CN207299513U - Biomass thermal wind furnace and fully-automatic biomass hot-blast stove - Google Patents

Abstract

The utility model relates to the field of combustion furnace equipment. The biomass hot blast stove provided includes an auger feeding assembly, a furnace body assembly and an air distribution device. The furnace body assembly includes a combustion furnace and divides the combustion furnace into a primary combustion chamber and a secondary combustion chamber. The partition board of the combustion chamber, the combustion furnace is provided with a feed port and a fire grate, and the partition board is provided with a primary fire outlet for connecting the primary combustion chamber and the secondary combustion chamber; the auger feeding assembly is connected with the feed port; the air distribution The device includes a primary combustion-supporting air device and a secondary combustion-supporting air device. The primary combustion-supporting air device includes a primary combustion-supporting air duct, a spiral air duct and a first fan. Extending into the bottom of the fire grate, the spiral air pipe extends into the top of the fire grate; the secondary combustion-supporting air device includes a secondary combustion-supporting air pipe and a second fan, and the secondary combustion-supporting air pipe extends above the primary combustion chamber and the primary fire outlet. The furnace structure design is reasonable, the primary suspension spiral combustion plus secondary combustion, complete combustion.

Description

Biomass hot blast stove and fully automatic biomass hot blast stove

technical field

The utility model relates to the field of combustion furnace equipment, in particular to a biomass hot blast stove and a fully automatic biomass hot blast stove.

Background technique

The combustion furnaces in the prior art are suitable for coal-fired furnaces, but not for biomass fuels. The furnace structure is unreasonable, and the fuel is directly piled up in the furnace, which is prone to slagging, coking and explosion. Gas, the temperature rise of the primary combustion chamber is slow, and the secondary combustion is difficult to activate, resulting in incomplete fuel combustion, and the emissions contain many harmful substances, polluting the environment.

Utility model content

The purpose of the utility model is to provide a biomass hot blast stove, which can be applied to various biomass pulverized fuels, and has more complete combustion, no pollution of emissions, and a cleaner environment.

Another object of the present utility model is to provide a fully automatic biomass hot blast stove capable of fully automatic control of the biomass hot blast stove, saving time and effort.

Embodiments of the utility model are achieved in that:

A biomass hot blast stove, which includes an auger feeding assembly, a furnace body assembly and an air distribution device. The furnace body assembly includes a combustion furnace and a partition. The grate and the partition divide the combustion furnace into a primary combustion chamber and a secondary combustion chamber. The partition is provided with a primary fire outlet for connecting the primary combustion chamber and the secondary combustion chamber; The wind device includes a primary combustion-supporting air device, and the primary combustion-supporting air device includes a primary combustion-supporting air duct, a spiral air duct and a first fan. One end extends below the fire grate, and the end of the spiral air duct away from the first blower extends to the top of the fire grate along the tangential direction of the furnace body of the combustion furnace.

Further, in other preferred embodiments of the present utility model, the above-mentioned air distribution device also includes a secondary combustion-supporting air device, the secondary combustion-supporting air device includes a secondary combustion-supporting air duct and a second fan, and the secondary combustion-supporting air duct includes a built-in The pipe and the external pipe, the two ends of the external pipe are respectively connected with the built-in pipe and the second fan, the built-in pipe is hovering in the primary combustion chamber and is set close to the partition, and the internal pipe is provided with a plurality of first fans connected with the primary combustion chamber. outlet duct.

Further, in other preferred embodiments of the present utility model, the above-mentioned built-in pipeline is also provided with a plurality of second air outlet pipes communicating with the secondary combustion chamber, and the second air outlet pipes extend from the primary combustion chamber through the primary fire outlet to the secondary combustion chamber.

Further, in other preferred embodiments of the present utility model, the above-mentioned feed port is connected with a feed pipe, and the end of the feed pipe close to the furnace body is provided with a plurality of anti-tempering air inlet holes, and the feed pipe is close to the furnace. One end of the body is provided with an anti-tempering air chamber, and the air distribution device also includes an anti-tempering air duct, and the two ends of the anti-tempering air duct communicate with the anti-tempering air chamber and the first fan respectively.

Further, in other preferred embodiments of the present utility model, the above-mentioned air distribution device also includes a first air distribution box and a second air distribution box, the first air distribution box communicates with the first fan, the primary combustion air duct and the second air distribution box It communicates with the first sub-air box, and the spiral air duct and anti-tempering air duct communicates with the second sub-air box.

Further, in other preferred embodiments of the present utility model, the above-mentioned biomass hot blast stove also includes a combustion-supporting water device, the combustion-supporting water device includes a water pipe and a bucket, and one end of the water pipe extends from the furnace body through the primary fire outlet into the secondary combustion chamber , the other end of the water pipe communicates with the bucket.

Further, in other preferred embodiments of the present utility model, the above-mentioned auger feeding assembly also includes an auger barrel, a feeding auger, a material box and an anti-shed material device, the feeding auger is installed in the auger barrel, and the material The box is connected with the auger barrel, and the anti-shed material device is installed in the material box, and the anti-shed material device is intermittently in contact with the feeding auger.

Further, in other preferred embodiments of the present utility model, the above-mentioned material-preventing device includes a stepped shaft and a material-moving assembly, and the material-moving assembly includes a support tube, a first material-moving fin and a second material-moving fin, and the support tube can be The first material-moving fin and the second material-moving fin protrude from the two ends of the support tube along the radial direction of the support tube and are rotatably sleeved on the stepped shaft.

Further, in other preferred embodiments of the present utility model, the above-mentioned primary combustion chamber is ellipsoidal, the secondary combustion chamber is hemispherical, and both the primary combustion chamber and the secondary combustion chamber are provided with refractory layers.

In addition, a fully automatic biomass hot blast stove includes a combustion controller and the above-mentioned biomass hot blast stove, and the combustion controller is connected with the biomass hot blast stove.

The beneficial effects of the utility model embodiment are:

The biomass hot blast stove provided by the utility model separates the combustion furnace to form a primary combustion chamber and a secondary combustion chamber through a partition, and communicates with the primary combustion chamber and the secondary combustion chamber through a primary fire outlet. The combustion-supporting air duct enters the air from the bottom of the grate to push the fuel upward, while the spiral air duct enters the air tangentially from the top of the grate along the inner wall of the furnace body to push the fuel to move in a spiral form. The primary combustion-supporting air duct and the spiral air The combination of the pipe makes the fuel rise in a spiral shape, which provides more sufficient time for the combustion of the fuel. After the fuel is burned, it enters the secondary combustion chamber through the primary fire escape. Combustion, primary combustion and secondary combustion are more complete, energy saving, and pollution-free. The fuel has wide applicability, and all kinds of crushed materials such as straw and sawdust can be used as fuel to save fuel costs.

The fully automatic biomass hot blast stove provided by the utility model can realize automatic control of the biomass hot blast stove, saving time and effort.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly introduced in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 is the structural representation of the biomass hot blast stove provided by the embodiment of the present invention under the first viewing angle;

Fig. 2 is a schematic structural view of the furnace body assembly of the biomass hot blast stove provided by the embodiment of the present invention;

Fig. 3 is a partial enlarged view of III in Fig. 1 provided by the embodiment of the present invention;

Fig. 4 is a schematic structural view of a biomass hot blast stove provided by an embodiment of the present invention under a second viewing angle;

Fig. 5 is the sectional view of Fig. 4 provided by the embodiment of the present invention at line A-A;

Fig. 6 is a schematic diagram of the cooperation between the anti-shedding device of the biomass hot blast stove and the feeding auger provided by the embodiment of the utility model.

Icon: 10-biomass hot blast stove; 100-furnace body assembly; 101-combustion furnace; 110-furnace body; 111-feed inlet; 112-feed pipe; Fire inlet hole; 115-coaling door; 116-ash door; 117-igniter; 118-fire grate; 119-fire viewing pipe; 120-furnace top; Frame; 130-partition; 131-primary combustion chamber; 132-secondary combustion chamber; 133-primary fire exit; 134-secondary fire exit; 200-air distribution device; 201-primary combustion air device; 202-secondary Combustion-supporting air device; 210-first fan; 211-primary combustion-supporting air duct; 212-spiral air duct; 213-anti-tempering air duct; 214-first air box; 215-second air box; ;220-second fan;221-secondary combustion air duct;222-built-in pipeline;223-external pipeline;224-first air outlet;225-second air outlet;300-combustion water device;310- Water pipe; 320-bucket; 400-heat exchanger assembly; 410-heat exchanger; 420-chimney; 500-auger feeding assembly; 510-auger barrel; 520-feeding auger; 530-feeding motor; 540-Material box; 550-Anti shed material device; 551-Step shaft; 552-Drawing component; 553-Support tube;

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present utility model, it should be noted that terms such as "first", "second", and "third" are only used to distinguish descriptions, and should not be understood as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a A detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary, and it may be an internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Example

Please refer to FIG. 1 , this embodiment provides a biomass hot blast stove 10 , which includes a furnace body assembly 100 , an air distribution device 200 , a combustion-supporting water device 300 , a heat exchanger assembly 400 and an auger feeding assembly 500 . Among them, the furnace body assembly 100 is respectively connected with the air distribution device 200, the combustion-supporting water device 300, the heat exchanger assembly 400 and the auger feeding assembly 500. Next, the above furnace body assembly 100 and the air distribution device 200 will be described in detail. , the specific structure and connection relationship of the combustion-supporting water device 300, the heat exchanger assembly 400 and the auger feeding assembly 500.

Please refer to Fig. 1, Fig. 2 and Fig. 3 for the structure of the furnace body assembly 100:

The furnace body assembly 100 is used for fuel combustion, and the furnace body assembly 100 includes a combustion furnace 101. The combustion furnace 101 includes a furnace body 110 and a furnace roof 120. The combustion furnace 101 can be a vertical combustion furnace or a horizontal combustion furnace. combustion furnace. In this embodiment, the specific structure of the combustion furnace 101 is described by taking a vertical combustion furnace as an example. The furnace body 110 of the combustion furnace 101 is provided with a feed inlet 111 , a coal feeding door 115 , an ash outlet door 116 , an igniter 117 and a fire grate 118 .

In this embodiment, the furnace body 110 and the furnace top 120 are connected by a sealing groove, and a partition 130 is arranged inside the combustion furnace 101 , and the partition 130 divides the combustion furnace 101 into a primary combustion chamber 131 and a secondary combustion chamber 132 . Wherein, the dividing plate 130 is arranged close to the connection position between the furnace body 110 and the furnace roof 120, the dividing plate 130 and the furnace body 110 form a primary combustion chamber 131, the dividing plate 130 and the furnace roof 120 form a secondary combustion chamber 132, and the primary combustion chamber 131 Located below the secondary combustion chamber 132, the partition 130 is provided with a primary fire exit 133, the furnace roof 120 is provided with a secondary fire exit 134, and the primary fire exit 133 is used to communicate with the primary combustion chamber 131 and the secondary combustion chamber 132, so that The flue gas and flame produced by combustion in the primary combustion chamber 131 enter the secondary combustion chamber 132 to continue combustion, and the secondary fire outlet 134 is used to discharge hot gas through the heat exchanger 410 for heat exchange.

The primary fire exit 133 and the secondary fire exit 134 can be provided at any position of the partition plate 130 and the furnace roof 120, for example: left, right or middle. Specifically in this embodiment, the opening position of the primary fire exit 133 is located on the left side of the partition 130, the opening position of the secondary fire exit 134 is located on the right side of the furnace roof 120, the opening of the primary fire exit 133 and the secondary fire exit 134 The position can make the flue gas produced by the primary combustion chamber 131 fully burn in the secondary combustion chamber 132, lengthen the stroke of the flue gas flow, make the space of the secondary combustion chamber 132 fully utilized, and prolong the flow of the flue gas in the secondary combustion chamber. The residence time of 132 can completely decompose the harmful substances in the flue gas.

In this embodiment, an elliptical primary combustion chamber 131 is formed by stacking refractory materials in the furnace body 110 , and the elliptical shape is similar to that of a duck egg. The elliptical primary combustion chamber 131 has the structural characteristics of being large in the middle and small at both ends. The volume near the primary fire exit 133 is reduced, which is beneficial to the rapid increase of the furnace pressure during combustion, so that the temperature in the furnace body 110 increases rapidly, and it is easy to burn at the primary fire exit 133. trigger secondary combustion. In this embodiment, however, the furnace roof 120 is stacked with refractory materials to form a hemispherical secondary combustion chamber 132 , which can burn the flue gas entering the secondary combustion chamber 132 to a greater extent. The refractory layer formed by the refractory material of the primary combustion chamber 131 and the secondary combustion chamber 132 can be adapted to the high temperature conditions of the primary combustion chamber 131 and the secondary combustion chamber 132 .

The furnace roof 120 is provided with a support frame for connecting the heat exchanger assembly 400, specifically, as shown in the positional relationship shown in Figure 2 and Figure 4, a first support frame 121 is provided on the left side of the furnace roof 120, and on the furnace roof A second support frame 122 is provided on the right side of 120 , and the furnace roof 120 is connected to the heat exchanger assembly 400 through the first support frame 121 and the second support frame 122 . Wherein, the second supporting frame 122 is a tubular structure and communicates with the secondary fire outlet 134 , which facilitates exhausting the completely combusted flue gas in the secondary combustion chamber 132 into the heat exchanger assembly 400 through the secondary fire outlet 134 for heat exchange. The specific structure of the heat exchanger assembly 400 will be explained below.

The feeding port 111 is arranged in the middle of the front of the furnace body 110 , and the feeding port 111 is used to connect the auger feeding assembly 500 . Please refer to Fig. 2 and Fig. 3 in combination, in the present embodiment, the feed port 111 is connected with the feed pipe 112, and the end of the feed pipe 112 near the furnace body 110 is provided with a plurality of anti-tempering air inlet holes 114, and the feed pipe The front end of 112 is provided with an anti-backfire air chamber 113 at a position corresponding to the anti-backfire air inlet hole 114 . The anti-backfire air chamber 113 is used to connect with the air distribution device 200 to enter the air into the anti-backfire air chamber 113, which can effectively prevent the auger feeding assembly 500 from backfire. The specific structures of the air distribution device 200 and the auger feeding assembly 500 will be described below.

The coal charging door 115 is arranged below the feed port 111 , and the coal charging door 115 is used for supplying fuel into the furnace body 110 . The inside of the coal charging door 115 is set on the furnace door plug (not shown). When the biomass fuel is in short supply, the furnace door plug is pulled out to add coal. The spiral combustion is carried out normally, and the coal charging door 115 is welded on the furnace body 110 .

The fire grate 118 is arranged below the coal charging door 115, and the fire grate 118 is made of three cast iron materials for holding and receiving fuel. In this embodiment, the fire grate 118 is movable and can be replaced from the coal charging door 115 .

An igniter 117 is arranged between the coal charging door 115 and the fire grate 118 , in other words, the igniter 117 is arranged below the coal charging door 115 and above the fire grate 118 .

The ash outlet 116 is arranged below the fire grate 118, and is used for accommodating completely burned fuel ashes. The furnace body 110 is provided with a fire viewing tube 119 near the feed port 111. The fire viewing tube 119 is used to observe the fuel combustion situation in the furnace body 110, so as to adjust the combustion parameters of the combustion furnace 101 in time according to the combustion situation.

The air distribution device 200 is used to provide air for the furnace body assembly 100 to facilitate fuel combustion in the furnace body assembly 100 . Please refer to FIG. 1 , FIG. 2 , FIG. 4 and FIG. 5 for the structure of the air distribution device 200 .

The air distribution device 200 includes a primary combustion-supporting air device 201 and a secondary combustion-supporting air device 202. The primary combustion-supporting air device 201 includes a first fan 210, a primary combustion-supporting air duct 211, a spiral air duct 212, an anti-backfire air duct 213, a first Air distribution box 214 , second air distribution box 215 and air control valve 216 ; the secondary combustion air device 202 includes a second fan 220 and a secondary combustion air pipe 221 .

Please refer to Figure 1 and Figure 4, the first fan 210 communicates with the first air distribution box 214, the primary combustion air duct 211 communicates with the second air distribution box 215 and the first air distribution box 214, and the primary combustion air duct 211 is far away from the first air distribution box 214 One end stretches into the below of fire grate 118. The spiral air duct 212 and the anti-backfire air duct 213 communicate with the second sub-air box 215 respectively. The end of the spiral air duct 212 away from the second sub-air box 215 extends to the top of the fire grate 118 along the tangential direction of the furnace body 110 of the combustion furnace 101, and is used to provide spiral upward wind into the furnace body 110, and the anti-backfire air duct 213 It communicates with the anti-backfire air chamber 113 in the feed pipe 112 and is used to supply air to the anti-backfire air chamber 113 . The primary combustion-supporting air duct 211 provides upward wind for the furnace body 110, and the spiral air duct 212 extends into the furnace body 110 along the tangential direction of the furnace body 110 to provide spiral upward wind for the furnace body 110. The primary combustion-supporting air duct 211 and the spiral air duct 212 and the two are used in conjunction to make the fuel suspended on the fire grate 118 burn in a spiral manner.

Please refer to Fig. 5, the second fan 220 communicates with the secondary combustion-supporting air duct 221, and the secondary combustion-supporting air duct 221 includes a built-in duct 222 and an external duct 223, wherein the two ends of the external duct 223 are connected to the built-in duct 222 and the second duct respectively. The two fans 220 are connected, and the built-in pipeline 222 is hovered in the primary combustion chamber 131 and is arranged near the partition plate 130. The built-in pipeline 222 is provided with a plurality of first air outlet pipes 224, and the first air outlet pipes 224 communicate with the primary combustion chamber 131. The swirling wind is provided into the primary combustion chamber 131 to prevent biomass combustion particles from entering the secondary combustion chamber 132 from the primary combustion chamber 131 prematurely. Specifically in this embodiment, the built-in duct 222 spirals in the primary combustion chamber 131 in a circular shape, and the number of the first air outlet pipes 224 is three, and the three first air outlet pipes 224 are evenly distributed around the circumference. The first air outlet pipe 224 is arranged at an angle with its tangent, and the included angle can be 45-75 degrees, preferably 60 degrees. The secondary air is fully mixed and effectively prevents biomass powder combustion particles from entering the secondary combustion chamber 132 from the primary combustion chamber 131 prematurely.

In addition, referring to Fig. 2, a plurality of second air outlet pipes 225 are also arranged on the built-in pipe 222, and the second air outlet pipe 225 communicates with the secondary combustion chamber 132, and since the built-in pipe 222 is arranged in the primary combustion chamber 131, The second air outlet pipe 225 extends from the primary combustion chamber 131 to the secondary combustion chamber 132 along a direction close to the axis of the furnace body 110 through the primary fire outlet 133 . That is, the second air outlet pipe 225 obliquely extends from the primary combustion chamber 131 into the secondary combustion chamber 132 . The secondary air from the second air outlet pipe 225 provides enough combustion-supporting air for the secondary combustion chamber 132 to make the secondary combustion more complete and thorough.

Please refer back to Fig. 1, the air control valve 216 is arranged between the first air distribution box 214 and the second air distribution box 215, and the air control valve 216 is controlled by the combustion controller to control the rotating wind provided by the spiral combustion air duct and the The anti-backfire wind provided by the anti-backfire air duct 213 keeps the fire or low fire state from extinguishing, and guarantees that it will not backfire in any burning state.

The combustion-supporting water device 300 is used to provide auxiliary fuel to the furnace body assembly 100. Please refer to FIG. 1 and FIG. , the other end of the water pipe 310 stretches into the secondary combustion chamber 132 from the middle part of the furnace body 110 through the primary fire outlet 133 . The water pipe 310 is carried out from the middle part of the furnace body 110 to the furnace body 110, and the water in the water pipe 310 in the primary combustion chamber 131 becomes water vapor under high temperature conditions, and the temperature at the primary fire outlet 133 is high, further dispelling the water in the water pipe 310. The high-temperature cracking of water vapor forms hydrogen and oxygen, which further provides fuel for secondary combustion.

The heat exchanger assembly 400 is used to realize the heat exchange between the hot gas discharged from the furnace body assembly 100 and the use environment. Please refer to FIG. 1 and FIG. 4 in conjunction. The structure of the heat exchanger assembly 400 is as follows: it includes a heat exchanger 410 And the chimney 420 , the chimney 420 is welded on the heat exchanger 410 , specifically located on the left side of the heat exchanger 410 , and the chimney 420 communicates with the smoke outlet of the heat exchanger 410 . In this embodiment, the heat exchange tubes of the heat exchanger 410 are arranged in the form of "433", that is, four finned cooling tubes are used in the lower layer, three finned cooling tubes are used in the middle layer, and three finned cooling tubes are used in the upper layer. of heat pipes. Such an arrangement increases the heat exchange area, and the heat exchange effect is good. The heat exchanger 410 is connected to the first support frame 121 of the furnace body 110 through its left connecting plate, and its right side communicates with the secondary combustion chamber 132 of the furnace body 110 through the second support frame 122 .

The auger feeding assembly 500 is used to provide biomass fuel to the furnace body assembly 100. Please refer to Fig. 1, Fig. 5 and Fig. 6 in conjunction. The structure of the auger feeding assembly 500 is as follows: Dragon 520, hopper 540, feeding motor 530 and shed-proof material device 550.

One end of the auger barrel 510 has a connecting flange, which is connected to the feed pipe 112 of the furnace body 110 through the connecting flange. The feeding motor 530 is installed with the end of the auger barrel 510 away from the feed pipe 112. 520 is installed in the auger barrel 510, and is connected with the feeding motor 530 shaft. The feed box 540 is arranged above the auger barrel 510 for feeding into the auger barrel 510 , and the fuel is sent to the furnace body 110 through the rotation of the auger 520 . The anti-filling device 550 is arranged in the feeder box 540 for agitating the fuel in the feeder box 540 to prevent fuel buildup in the feeder box 540 . The anti-filling device 550 is intermittently in contact with the feeding auger 520 , so as to achieve intermittent agitation of the fuel in the feed tank 540 .

Specifically, referring to FIG. 6 , the anti-slip device 550 includes a stepped shaft 551 and a shifting assembly 552, and the shifting assembly 552 includes a support tube 553, a first shifting fin 554 and a second shifting fin 555, and the support tube 553 can be Rotatably sleeved on the stepped shaft 551 , the first shifting fin 554 and the second shifting fin 555 protrude from both ends of the support tube 553 along the running direction of the support tube 553 .

In this embodiment, the upper part of the material box 540 is a cuboid structure, and the lower part is a quadrangular pyramid structure. The stepped shaft 551 is fixedly installed on the lower part of the material box 540, and the support tube 553 is installed on the stepped shaft 551 obliquely. The length of 554 is greater than the length of the second feeding auger 555, and the second feeding auger 555 stretches out of the discharge port of the feed box 540 and intermittently contacts the feeding auger 520. Because the feeding auger 520 is in a spiral shape, the feeding auger When 520 rotates, it will intermittently stir the second material-moving fin 555, thereby driving the second material-moving wing 555 to rotate, and the second material-moving wing 555 then drives the support tube 553 and the first material-moving wing connected to the support tube 553 554 rotates, thereby plays the effect of anti-shed material, effectively prevents the phenomenon that the fuel in the material box 540 takes place the shed material.

Please refer to Fig. 1 and Fig. 2 together, the working principle of the biomass hot blast stove 10 is: the combustion furnace 101 is divided into a primary combustion chamber 131 and a secondary combustion chamber 132 by a partition 130, and the fuel in the material box 540 passes through the feeding auger 520 Delivered to the feed port 111, the fuel falls onto the fire grate 118. Air is fed into the body of furnace 110 through the first blower fan 210, wherein the primary combustion-supporting air duct 211 enters the air from below the fire grate 118, and the spiral air duct 212 enters the air tangentially along the inner wall of the combustion furnace from above the fire grate 118. With the cooperation of the primary combustion air duct 211 and the spiral air duct 212, the fuel burns spirally upwards in the primary combustion chamber 131, and the burned smoke, flame and part of the unburned floating ashes enter the secondary combustion chamber from the primary fire outlet 133. The secondary combustion chamber 132 continues to burn, and the setting of the secondary combustion-supporting air duct 221 not only provides secondary air for the primary combustion, but also prolongs the combustion of smoke, flame and partially unburned floating ashes from the primary fire exit. 133 enters the time of secondary combustion chamber 132, has further strengthened the combustion state of primary combustion. The secondary combustion chamber 132 can fully burn harmful substances in the flue gas, and cooperate with the second air outlet pipe 225 of the secondary combustion pipe to provide air for the secondary combustion chamber 132. Fuel is provided, which is conducive to strengthening the combustion of smoke, flame and partially unburned floating ash in the secondary combustion chamber 132, so that the harmful substances can be burned more completely, and then the smoke after combustion is removed from the secondary combustion chamber. The discharge from the fire outlet 134 is discharged into the atmosphere after heat exchange by the heat exchanger assembly 400, and the content of harmful substances is low.

In addition, the embodiment of the utility model also provides a fully automatic biomass hot blast stove (not shown in the figure), which includes a combustion controller (not shown in the figure) and the above-mentioned biomass hot blast stove 10, the combustion controller and the biomass hot blast stove 10 connections.

Combustion controller is the core of realizing automatic feeding and automatic fire control, and is electrically connected with primary combustion-supporting blower, secondary combustion-supporting blower, air control valve 216, feeding motor 530, and igniter 117. For the convenience of explanation, the combustion state of the biomass hot blast stove 10 is divided into four states: ignition, low fire, medium fire and high fire. The combustion parameters of each combustion state include feed time, feed stop time (cycle intermittent feeding), combustion fan voltage, air control valve 216 opening state and stage time; each combustion parameter can be adjusted in real time according to fuel conditions. The working modes of the combustion controller include automatic control and manual control. In the automatic control mode, manual intervention can be performed on each executive component; in the manual control mode, the fire intensity can be selected in real time and continue to work according to the selected fire intensity.

The control method of automatic control is as follows:

The temperature requirement of the application is the basic basis for the control. The fire intensity is determined by comparing the measured temperature of the application site measured by the combustion controller with the required target temperature.

Ignition: The igniter 117 is powered on, the feeding motor 530 starts feeding, and stops feeding when the feeding time is up; the first blower 210 delays the high-pressure start and low-pressure operation, the air control valve 216 is closed, and the second blower 220 starts high-pressure and low-pressure operation When the feeding stop time is up, the igniter 117 loses power, and now the fuel has been ignited, if it does not need to heat up, it will enter the fire preservation state, and if it needs to heat up, it will enter the middle fire state. If the wind is given too early or the wind is too strong, the fuel will be blown away from the igniter 117, making the ignition ineffective; if the wind is given too late, smoke will be emitted, and the ignition time will be extended.

Fire protection: the feeding motor 530 first feeds materials according to the given feeding time, and then stops feeding according to the feeding stop time. If there is no demand for heating up, the cycle continues; the first fan 210 operates at medium pressure, and the air control valve 216 is half opened , the second blower 220 runs at full pressure; if there is a demand for temperature rise, it will enter the medium fire state, and if there is no demand for temperature rise, it will continue to keep the fire. In the fire keeping state, when entering the fire keeping stage, there is less fuel in the furnace, so the fuel is supplied first to ensure that the fire is small and not extinguished; the secondary combustion is difficult to activate, so the first fan 210 operates at medium pressure, and the second fan 220 runs at full pressure operation, to prevent smoke from entering the secondary combustion chamber 132, and ensure the primary combustion rate of fuel; if the opening of the air control valve 216 is too small, it will smoke and tend to return to the material box 540; if the opening of the air control valve 216 is too large, the fuel will be blown Too loose, or even turn off the flame.

Medium fire: The feeding motor 530 first feeds the material according to the given feeding time, then stops feeding according to the feeding stop time, and continues to circulate within the set medium fire time period, the first fan 210 and the second fan 220 are fully pressed Operation, the wind control valve 216 is fully opened; when the time is up in the middle fire stage, if it needs to heat up, it will turn to the high fire state, if it does not need to heat up, it will enter the low fire operation.

Low fire: The feeding motor 530 first does not feed according to the given feeding stop time, then feeds according to the feeding time, and continues to circulate within the set low fire time period, the first fan 210 operates at medium pressure, and the air control valve 216 is turned on halfway, and the second fan 220 runs at full pressure; when the time is up for the low fire stage, if there is a demand for heating, it will enter the medium fire state, and if there is no demand for temperature rise, it will enter the fire preservation state. The stage of low fire is transferred from the stage of high fire or medium fire, and there are more fuels in the furnace, so the fuel is not fed first, and then the fuel is fed. The other control principles are the same as that of fire protection.

Large fire: The feeding motor 530 first feeds the material according to the given feeding time, then stops feeding according to the feeding stop time, and continues to circulate when the measured temperature can meet the temperature rise requirement, the first fan 210 and the second fan 220 run at full pressure, The air control valve 216 is fully opened; when the measured temperature rises too fast, it means that the fuel supply is too much, so reduce the feeding time of the feeding motor 530 or prolong the stop feeding time; when the measured temperature rise speed does not meet the temperature rise requirement , indicating that the fuel supply is insufficient, increase the feeding time of the feeding motor 530 or reduce the feeding stop time;

In the stage of medium fire and high fire, the first blower 210 and the second blower 220 run at full pressure, the air control valve 216 is fully opened, and the combustion of fuel in the primary combustion chamber 131 is fully realized. A small amount of water in the device 300 is vaporized and cracked to assist combustion.

According to the specific biomass fuel and application requirements, the adjustment of combustion parameters is only carried out when the fire is adjusted for the first time, and it can be fully automatically controlled during normal use.

In summary, the biomass hot blast stove 10 provided by the utility model separates the combustion furnace 101 to form a primary combustion chamber 131 and a secondary combustion chamber 132 through a partition 130, and communicates with the primary combustion chamber 131 and the secondary combustion chamber 131 through a primary fire exit 133. The combustion chamber 132 and the fire grate 118 are used to hold the fuel. The primary combustion air duct 211 enters the air from the bottom of the fire grate 118 to push the fuel to burn and move upward. The spiral air intake in the tangential direction pushes the fuel combustion to move in a spiral form. The primary combustion-supporting air duct 211 and the spiral air duct 212 cooperate to make the fuel rise in a spiral shape, which not only increases the contact area and contact time of fuel combustion, but also provides The combustion of the fuel provides more sufficient time. After the fuel burns, it enters the secondary combustion chamber 132 through the primary fire outlet 133. The setting of the secondary combustion chamber 132 enables the harmful substances in the flue gas to be fully burned. More fully, save energy, and no pollution. The fuel has wide applicability, and all kinds of crushed materials such as straw and sawdust can be used as fuel to save fuel costs.

The fully automatic biomass hot blast stove provided by the utility model can realize the automatic control of the biomass hot blast stove 10, saving time and effort.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A kind of 1. biomass thermal wind furnace, it is characterised in that it includes auger feeding assembly, furnace body assembly and air distribution device,

   The furnace body assembly includes combustion furnace and partition plate, and feed inlet and the stove for access fuel are offered on the combustion furnace The combustion furnace is divided into primary zone and secondary combustion chamber by row, the partition plate, and the partition plate is provided with for connecting once Combustion chamber and secondary combustion chamber once walk burner；The auger feeding assembly is connected with the feed inlet；

   The air distribution device includes once combustion-supporting wind apparatus, and the once combustion-supporting wind apparatus includes once combustion-supporting air hose, spiral wind Pipe and the first wind turbine, the once combustion-supporting air hose and the spiral duct are connected with first wind turbine respectively, described once to help The lower section of the fire grate is stretched into the one end of combustion air hose away from first wind turbine, and the spiral duct is away from first wind turbine The tangential direction of one end along the furnace body of the combustion furnace extends to the top of the fire grate.
2. 2. biomass thermal wind furnace according to claim 1, it is characterised in that the air distribution device further includes secondary combustion-supporting wind Device, the secondary combustion-supporting wind apparatus include secondary combustion-supporting air hose and the second wind turbine, and the secondary combustion-supporting air hose includes built-in pipe Road and external pipeline, the both ends of the external pipeline are connected with the built-in pipe and second wind turbine respectively, described built-in Pipeline hovers above the primary zone and is set close to the partition plate, and the built-in pipe is provided with multiple once to be fired with described Burn the first discharge pipe of room connection.
3. 3. biomass thermal wind furnace according to claim 2, it is characterised in that the built-in pipe is additionally provided with multiple and institute The second discharge pipe of secondary combustion chamber connection is stated, second discharge pipe is once walked burner described in from the primary zone and prolonged Extend the secondary combustion chamber.
4. 4. biomass thermal wind furnace according to claim 1, it is characterised in that the feed inlet is connected with feed pipe, described One end on feed pipe close to the furnace body is provided with multiple anti-backfire air inlet holes, and the feed pipe is close to one end of the furnace body Outside is provided with anti-backfire air compartment, and the air distribution device further includes anti-backfire air hose, the both ends of the anti-backfire air hose respectively with The anti-backfire air compartment is connected with first wind turbine.
5. 5. biomass thermal wind furnace according to claim 4, it is characterised in that the air distribution device further includes the first draught distributing box With the second draught distributing box, first draught distributing box is connected with first wind turbine, the once combustion-supporting air hose and second point of wind Case is connected with first draught distributing box, and the spiral duct and the anti-backfire air hose are connected with second draught distributing box.
6. 6. according to Claims 1 to 5 any one of them biomass thermal wind furnace, it is characterised in that the biomass thermal wind furnace is also Including combustion-supporting water installations, the combustion-supporting water installations include water pipe and bucket, and one end of the water pipe is described by being passed through in the furnace body Once walk burner and stretch into the secondary combustion chamber, the other end of the water pipe is connected with the bucket.
7. 7. according to Claims 1 to 5 any one of them biomass thermal wind furnace, it is characterised in that the auger feeding assembly is also Including auger cylinder, feeding auger, hopper and anti-scaffold device, the feeding auger is installed in the auger cylinder, the hopper Be connected with the auger cylinder, the anti-scaffold device is installed in the hopper, the anti-scaffold device by phased manner with it is described Feeding auger contacts.
8. 8. biomass thermal wind furnace according to claim 7, it is characterised in that the anti-scaffold device includes multi-diameter shaft and dials Expect component, the material toggling component includes support tube, the first material toggling wing and the second material toggling wing, the support tube and is rotationally sheathed on On the multi-diameter shaft, the first material toggling wing and the second material toggling wing protrude along the radial direction of the support tube set respectively In the both ends of the support tube.
9. 9. biomass thermal wind furnace according to claim 1, it is characterised in that the primary zone is elliposoidal, described Secondary combustion chamber is hemispherical, and flame retardant coating is both provided with the primary zone and the second-time burning room.
10. 10. a kind of fully-automatic biomass hot-blast stove, it is characterised in that it includes combustion controller and such as claim 1~9 times Biomass thermal wind furnace described in one, the combustion controller are connected with the biomass thermal wind furnace.