CN219318445U - Positive pressure garbage incinerator with movable grate and secondary combustion chamber - Google Patents

Abstract

The utility model is a positive pressure garbage incinerator with a movable grate and a secondary combustion chamber, comprising: a furnace body of the incinerator, a wet garbage feeding bin, a dry garbage feeding bin, a material pushing device, a water pipe type furnace bridge, Water tank, secondary combustion chamber, movable grate, slag conveyor and blower; waste incineration under positive pressure can improve the penetration of oxygen, heat radiation and heat transfer, increase the speed of waste incineration, and have high thermal efficiency; The "other dry garbage" and "kitchen wet garbage" sorted out by the community are burned to ashes in the same incinerator through their respective feeding ports, which overcomes the fact that traditional garbage incinerators can only incinerate "other dry garbage" with low moisture content limitations.

Description

A positive pressure garbage incinerator with movable grate and secondary combustion chamber

technical field

The utility model relates to a garbage incinerator, in particular, a movable grate equipped with wet garbage drying and slag removal, a secondary combustion chamber and a positive pressure garbage incinerator for generating steam and hot water for heating, belonging to environmental protection equipment field;

Background technique

Generally, the calorific value of well-sorted community dry waste is 2100-3300 kcal/kg, compared to 1200-1600 kcal/kg for unsorted mixed waste, and the calorific value of dry waste is larger than that of mixed waste The range is improved, and it can be incinerated well in the furnace, generating high temperature and releasing a lot of heat; the sorted wet kitchen waste contains plastic packaging bags, melon and fruit peels and kitchen residues, with low calorific value, which can be fermented and degraded or baked Drying and dehydration can increase the heat and then be reused. The classified dry waste can be incinerated to reduce the amount of resources; After drying and storage, it enters the pyrolysis gasification furnace for treatment, and the heavy kitchen wet waste under the sieve is used as the raw material for burning bricks, which increases the equipment investment and floor space for wet waste treatment. The light waste that comes out needs to be dried and dehydrated by hot air, and then enters the pyrolysis and vaporization furnace for treatment, which increases the equipment investment, operating cost and floor space for drying the waste; Garbage is sorted to obtain perishable organic matter and combustibles; the combusted matter is used for incineration to generate electricity, and aerobic microorganisms are used to degrade perishable organic matter. However, perishable organic matter or kitchen waste after garbage sorting contains A lot of plastic packaging and non-fermentable sundries are not conducive to the fermentation of organic matter, the fermentation time is long, the floor area is large, the fertilizer efficiency of the fermentation product is low, the commercial value is small, and the operating cost is high; the conventional large-scale waste incineration of more than 500 tons/day Power generation belongs to the incineration of mixed waste. The mixed waste has high moisture content, high humidity, and low calorific value. The waste is not fully incinerated in the furnace, and the temperature of the furnace is low. -1000℃ burns dioxin, carbon monoxide and organic volatiles in the decomposition flue gas, which greatly increases the energy cost of waste incineration.

Contents of the invention

The purpose of this utility model is to overcome and make up for the defects and deficiencies of the prior art, thereby providing a kind of "other dry garbage" and "dining and kitchen wet garbage" after the household garbage of troops, schools, institutions, streets and communities, and villages and towns is classified. "It is a kind of positive pressure garbage incinerator that is directly incinerated in the same incinerator through the respective feeding ports, and the "food and kitchen wet garbage" is heated, dehydrated and dried on the movable grate of the incinerator before incineration;

The utility model is a positive pressure garbage incinerator with a movable grate and a secondary combustion chamber, which is realized in the following manner:

A positive pressure garbage incinerator with a movable grate and a secondary combustion chamber, including: the furnace body of the incinerator, the wet garbage feeding bin, the dry garbage feeding bin, the pushing device, the water tube type furnace bridge, the water tank, the secondary Combustion chambers, moving grates, slag conveyors and blowers;

The flue gas outlet at the lower part of the furnace body of the incinerator communicates with the air inlet of the secondary combustion chamber through a flange connection. The feeding port of the conveyor is connected, and the feeding port at one end of the movable grate shell is connected with the discharge port of the wet garbage feeding bin. The upper part of the wet garbage feeding bin is equipped with gate valve three, and the lower part of the wet garbage feeding bin is equipped with gate valve four. The air outlet is connected to the second air inlet of the secondary combustion chamber through pipes and valve 1, and the air outlet of the blower is connected to the air inlet of the air bin through pipes and valve 2; the top of the incinerator is equipped with a dry garbage feeding bin. The top of the dry garbage feeding bin is equipped with gate valve 1 and the bottom is equipped with gate valve 2. Below the gate valve 2 is the garbage burning buffer area in the furnace body; the water tank is connected to the upper shell of the incinerator through the pipeline 2 with a water jacket;

The furnace body of the incinerator is a cylindrical shell made of metal. The inner wall of the lower part of the furnace body of the incinerator is built with a layer of refractory insulation material. The upper shell of the furnace body of the incinerator is equipped with a water jacket. According to the horizontal direction, the pusher plate of the pusher device is arranged. The lower part of the pusher plate is equipped with a water tube type furnace bridge. The water tube type furnace bridge is connected to the water jacket through the water pipe. The gas outlet and the air chamber are arranged on the outer layer of the lower part of the furnace body of the incinerator. The furnace body of the incinerator is the incineration high-temperature area, and multiple connected air inlets are arranged between the incineration high-temperature area and the air chamber. The gas outlet at the upper part of the furnace body communicates with the gas inlet at the lower part of the furnace body of the incinerator through pipeline one;

The movable grate includes a reciprocating grate or a chain grate, which is driven by a motor or a hydraulic motor. The grate shell is a sealed cuboid made of metal, and the movable grate is arranged inside the grate shell;

The slag conveyor includes a scraper type slag extractor, a screw slag extractor and a crawler conveyor;

The pusher device belongs to a conventional electric telescopic screw pusher, comprising an electric screw pusher control device and a pusher plate, the pusher plate is fixed on the top end of the telescopic rod of the screw pusher, and the other end of the screw is connected to the The screw pusher control device is connected. When the motor is started, the screw of the screw pusher rotates. When the screw rotates clockwise, the screw extends from the outside of the furnace body into the furnace body, and the pusher plate pushes the garbage in the garbage incineration buffer area to the furnace. The middle part of the body, in order to prevent the garbage from being heated and coked into lumps, staying in the furnace body and not falling into the high-temperature area of garbage incineration for incineration; when reversing, the screw retracts from the furnace body;

The secondary combustion chamber is composed of a steel pipe and a refractory material. A layer of refractory material is built on the inner wall of the steel pipe for heat preservation. A plurality of connected air inlet holes 2 are arranged between the air ducts of the secondary combustion chamber;

The air bin described above belongs to the wind buffer area or the air inlet box;

The water tank described above belongs to a conventional boiler water inlet or make-up water tank, and is equipped with a water level controller and a sight glass inside;

In the utility model, the "other dry garbage" with high calorific value and "kitchen wet garbage" with low calorific value after community classification are added to the garbage incinerator through their respective feeding ports; wherein, the "other dry garbage" with high calorific value is heated The value is high, and it can be fully burned in the high-temperature area of the incinerator's furnace body, and a large amount of heat is generated; while the "food and kitchen wet garbage" is dehydrated after absorbing the heat released by the incineration of "other dry garbage" on the movable grate. Drying makes the wet garbage become dry garbage, and the calorific value of the garbage is greatly increased. The dry garbage is transported to the high-temperature area of the garbage incineration furnace body of the incinerator with the movement of the movable grate for high-temperature incineration to embers. One of the main features of the new type.

In the utility model, the "other dry garbage" in the shell of the garbage incinerator is affected by the high-temperature heat radiation and heat transfer in the high-temperature zone of garbage incineration, the moisture in the "other dry garbage" is continuously evaporated into water vapor, and the "other dry garbage" The calorific value of "is greatly increased, and higher temperatures are generated during incineration, and waste plastics and rubber wastes are thermally cracked and turned into tar gas phases of hydrocarbons, and the water vapor and tar gas phases are decompressed or returned through the vent pipe. Go to the waste incineration high-temperature zone at the lower part of the low-pressure garbage incinerator for incineration, and the water vapor will undergo a water-gas reaction in the high-temperature zone of incineration, producing combustible hydrogen and carbon monoxide with increased calorific value, increasing the combustion temperature of the incinerator, and tar gas phase Combustion in the high-temperature area of waste incineration reduces the amount of tar emissions in the flue gas; at the same time, the incineration of tar also improves the heat utilization rate of waste incineration, and the combustion temperature in the high-temperature area of waste incineration reaches 850-1100 ° C; this is One of the main features of the utility model.

The traditional garbage drying is to transport the broken pieces of garbage to the rotary drying cylinder, and transport the electric hot air or the hot air of the oil furnace into the rotary drying cylinder, and the garbage will be dehydrated and dried after direct contact with the hot air to generate heat transfer; this increases the The electricity consumption cost or fuel consumption cost of generating hot air also increases the investment and floor area of the drying equipment; Carry out dehydration and drying in the same incinerator to turn into dry garbage and then incinerate to embers. The heat utilization rate of garbage incineration is high, which saves the cost of electric heat or fuel oil that needs to be consumed for drying and dehydrating wet garbage; this is one of the main features of the utility model. ;

The working principle of the utility model is:

First open the upper gate valve 1 of the dry garbage feeding bin on the top of the garbage incinerator, close the lower gate valve 2 of the dry garbage feeding bin, and add the high calorific value "other dry garbage (hereinafter referred to as dry garbage)" sorted by the community into the In the dry garbage feeding bin, close the upper gate valve 1 of the dry garbage feeding bin, open the lower gate valve 2 of the dry garbage feeding bin, and then the dry garbage will fall down to the top of the water pipe furnace bridge in the incinerator, and then close the lower part of the dry garbage feeding bin Gate valve 2, open the upper gate valve 1 of the dry garbage feeding bin, and then add the high calorific value "other dry garbage" (hereinafter referred to as dry garbage) classified by the community into the dry garbage feeding bin through the lifting conveyor, and close the upper part of the dry garbage feeding bin Gate valve 1, when it is necessary to add dry garbage to the furnace body of the garbage incinerator, then open the lower gate valve 2 of the dry garbage feeding bin, and the dry garbage will fall downward into the furnace body of the garbage incinerator, and the furnace of the garbage incinerator is recycled in the above-mentioned way. The "other dry garbage" sorted by the community is added to the body for incineration; under the pressurization of the air delivered by the blower, the dry garbage is incinerated under positive pressure in the high temperature area of the incinerator (the pressure in the incinerator is controlled at 3000-5000Pa), and the dry garbage A large amount of heat is released during incineration, and the incineration temperature reaches 900-1100°C. The open flame smoke generated by incineration is discharged into the secondary combustion chamber from the flue gas outlet. In the secondary combustion chamber, the air sent by the blower and the smoke in the Dioxins, carbon monoxide, and organic waste gas further undergo combustion oxidation-reduction reactions. After the high-temperature flue gas discharged from the secondary combustion chamber undergoes conventional flue gas heat recovery and flue gas purification to meet the standard treatment, the standard flue gas is discharged to the environment through the chimney. ;Open the upper gate valve three of the wet garbage feeding bin, close the lower gate valve four of the wet garbage feeding bin, and add the low calorific value "food kitchen wet garbage (hereinafter referred to as wet garbage)" classified by the community into the wet garbage feeding bin through the lifting conveyor , close the upper gate valve 3 of the wet garbage feeding bin, and then open the lower gate valve 4 of the wet garbage feeding bin, the wet garbage will fall down from the wet garbage feeding bin onto the movable grate, then close the lower gate valve 4 of the wet garbage feeding bin, and open the gate valve 3. Add the wet garbage sorted by the community into the wet garbage feeding bin through the lifting conveyor, and close the upper gate valve of the wet garbage feeding bin. 3. When it is necessary to add wet garbage to the movable grate, open the wet garbage feeding bin The lower gate valve four, the wet garbage falls down onto the movable grate, and the above method is used to add the wet garbage to the movable grate for drying, dehydration, and then become dry garbage before incineration; the wet garbage on the movable grate Affected by the heat radiation and heat transfer in the high-temperature area of waste incineration, the water in the wet waste is evaporated, and the wet waste is dried into dry waste. The dry waste moves to the high-temperature area of waste incineration at the lower part of the incinerator as the movable grate moves. Burned to ashes, the ash or slag produced in the high-temperature area of waste incineration is transported to the slag collection tank with the movement of the movable grate, and the ash or slag is discharged out of the waste incinerator through the slag conveyor;

The incinerator is equipped with a water tube furnace bridge. After the furnace bridge is heated, the water in the water pipe becomes hot water or steam. The water takes away the heat from the outer wall of the water pipe to prevent the thermal deformation of the furnace bridge from bending after the furnace bridge is heated. At the same time, implement the resource utilization of hot water and steam generated by waste incineration;

In the upper part of the garbage incinerator, water vapor and tar gas will be generated after the garbage is heated, increasing the pressure on the upper part of the incinerator, and a safety accident will occur when the pressure exceeds the standard. In the lower part of the pressured waste incinerator, water vapor is introduced into the high-temperature area of waste incineration to undergo a water-gas reaction, which produces combustible hydrogen and carbon monoxide with increased calorific value, and increases the combustion temperature of the incinerator; the tar gas produced by the incinerator is introduced into the Combustion in the high-temperature zone of waste incineration reduces the amount of tar emissions in the flue gas; at the same time, the incineration of tar also improves the heat utilization rate of waste incineration;

When the garbage is burned in the incinerator, the garbage will be heated into mounds and agglomerated, resulting in the garbage not falling naturally on the water tube furnace bridge for normal incineration. The electric screw pusher device is used to heat the inside of the incinerator into mounds Push and loosen the agglomerated garbage and fall into the water tube furnace bridge for normal incineration;

Equipped with a fire viewing camera probe on the garbage incinerator, it is convenient to operate the air intake of the blower, the temperature of the incinerator and the status of the garbage incinerated to ashes;

Using the alternate opening or closing of the upper gate valve and the lower gate valve of the "dry garbage feeding bin" and "wet garbage feeding bin" can effectively prevent the water vapor and tar gas phase in the garbage incinerator when adding garbage raw materials to the garbage incinerator. The overflow from the incinerator will cause environmental pollution, which can ensure that the continuous normal operation of the garbage incinerator will not be affected when adding garbage raw materials.

The positive pressure of the blower (ie 3000-5000pa) is used to transport the air into the incinerator. There is only one flue gas outlet for pressure relief in the furnace body of the incinerator and the movable grate shell, and the discharge of the wet garbage feeding bin and the dry garbage The unloading of the feeding bin is all unloading under the condition of sealing; the garbage incineration under the positive pressure of the utility model can improve the penetration of oxygen, heat radiation and heat transfer, and increase the oxygen pressure to enter the deep inside of the garbage Combustion results in a high incineration temperature in the high-temperature area of waste incineration and a fast waste incineration speed; at the same time, the smoke with an open flame is ejected from the flue gas outlet at the lower part of the incinerator and enters the secondary combustion chamber;

The advancement of the present utility model is:

1. The high-temperature heat generated by the incineration of "other dry waste" with high calorific value is supplied to the heat required for drying and dehydrating the "wet kitchen waste" with low calorific value, which makes full use of the thermal efficiency of waste incineration and overcomes the conventional use of electric heat for drying waste Or the defect of high energy consumption of hot air drying garbage produced by fuel incineration;

2. The garbage incinerator of the present utility model can directly incinerate the "other dry garbage" and "dining and kitchen wet garbage" classified by the community to the same incinerator through their respective feeding ports, which overcomes the traditional garbage incinerator. The limitation that only "other dry waste" can be incinerated;

3. The "kitchen wet waste" sorted out by the community has low calorific value and high moisture content, so it cannot be incinerated. It is usually crushed, squeezed and dehydrated, and then fermented to reduce the amount. Fermentation requires additional equipment. Fermentation It needs hot air or heat conduction oil to heat to maintain the fermentation temperature, which increases the processing cost and equipment footprint of "wet kitchen garbage". "All incinerated to ashes in the same waste incinerator, which reduces the equipment investment and operating costs for the harmless and reduction treatment of community domestic waste;

4. The utility model adopts the garbage incineration under positive pressure, which can improve the penetration of oxygen, heat radiation and heat transfer, and increase the oxygen pressure to enter the deep inside of the garbage for combustion, resulting in high incineration temperature in the high-temperature area of garbage incineration. The speed of waste incineration is fast, and the thermal efficiency of waste incineration is high;

Description of drawings

Fig. 1 is a structural representation of a positive pressure garbage incinerator with a movable grate and a secondary combustion chamber of the utility model;

Fig. 2 is the lower structure C-C section top view of the furnace body of the incinerator of the present utility model;

Fig. 3 is the A-A cross-sectional top view of the body of furnace middle structure of the incinerator of the present utility model;

Fig. 4 is the top view of the structure B-B section above the movable grate shell of the utility model;

Fig. 5 is the secondary combustion chamber structure D-D sectional top view of the utility model;

Fig. 6 is the E-E sectional top view of the structure above the movable grate of the present utility model;

In the above-mentioned Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, 1-gate valve one, 2-dry garbage feeding bin, 3-gate valve two, 4-gas outlet, 5-the furnace body of the incinerator , 6-steam outlet, 7-incineration high temperature zone, 8-water level controller, 9-water tank, 10-water jacket, 11-water pipe, 12-pipeline one, 13-electric screw pusher control device, 14-push Material plate, 15-gas inlet, 16-water pipe furnace bridge, 17-refractory brick material, 18-fire viewing camera probe, 19-gate valve three, 20-wet garbage feeding bin, 21-gate valve four, 22-air inlet hole 1. 23-blower, 24-grate shell, 25-rotating shaft cylinder of the grate, 26-movable grate, 27-air chamber, 28-air inlet 1, 29-valve 1, 30-slag collection tank, 31-Slag conveyor, 32-Air inlet 2, 33-Air duct of secondary combustion chamber, 34-Secondary combustion chamber shell, 35-Air inlet 2, 36-Slag outlet, 37-Slag conveyor motor , 38-the flue gas outlet of the secondary combustion chamber, 39-the motor of the grate, 40-valve 2, 41-the air chamber shell, 42-flange, 43-the secondary combustion chamber, 44-feed port, 45- Pipeline 2, 46-waste incineration buffer area, 47-flue gas outlet, 48-refractory material;

Detailed ways

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, a kind of positive pressure garbage incinerator with movable grate and secondary combustion chamber comprises: the furnace body (5) of the incinerator , wet garbage feeding bin (20), dry garbage feeding bin (2), pushing device, water tube furnace bridge (16), water tank (9), secondary combustion chamber (43), movable grate (26), slag Conveyor (31) and blower (23);

The lower flue gas outlet (47) of the furnace body (5) of the incinerator communicates with the air inlet of the secondary combustion chamber (43) through a flange (42). (24) is connected in the middle of the top, the slag outlet of the movable grate (26) is connected with the feed inlet of the slag conveyor (31), and the feed inlet (44) of the movable grate shell (24) one end is connected with the wet garbage The discharge port of the feeding bin (20) is connected, the upper part of the wet garbage feeding bin (20) is equipped with gate valve three (19), the bottom of the wet garbage feeding bin (20) is configured with gate valve four (21), and the air outlet of the blower (23) Connect and communicate with the casing air inlet two (32) of secondary combustion chamber (43) by pipeline and valve one (29); The tuyere (28) is connected and communicated; the top of the furnace body (5) of the incinerator is arranged in the garbage feeding bin (2), and the top of the dry garbage feeding bin (2) is equipped with a gate valve one (1) and a gate valve two (3) at the bottom, Below the gate valve two (3) is the garbage burning buffer area (46) in the furnace body (5); the water tank (9) is connected to the furnace body (5) upper shell of the incinerator through the pipeline two (45) and equipped with a water jacket (10) The body of furnace (5) of the incinerator belongs to a cylindrical shell of metal material, and the inner wall of the body of furnace (5) bottom of the incinerator is built with a layer of refractory insulation material (17), and the body of furnace (5) upper shell of the incinerator is equipped with water Cover (10), the middle and lower part of the furnace body (5) of the incinerator, the pusher plate (14) of the pusher device is arranged in the horizontal direction, the water tube type furnace bridge (16) is arranged at the bottom of the pusher plate (14), and the water pipe Type furnace bridge (16) is connected and communicated with water jacket (10) by water pipe (11), and the flue gas outlet (47) of body of furnace is configured on the side of the body of heater (5) of water pipe type furnace bridge (16) bottom, and wind storehouse ( 27) It is arranged on the outer layer of the lower part of the furnace body (5) of the incinerator. The lower part of the furnace body (5) of the incinerator is the incineration high-temperature zone (7). A connected air inlet one (22), the gas outlet (4) on the top of the body of heater (5) of the incinerator is communicated with the gas inlet (15) on the bottom of the body of heater (5) of the incinerator through the pipeline one (12); Movable fire grate (26), comprises reciprocating fire grate or chain fire grate, is driven by electric motor or hydraulic motor, and fire grate casing (24) belongs to the sealing cuboid of metal material, and movable fire grate (26) is arranged on fire grate casing (24 ) inside; slag conveyor (31), including scraper type slag extractor, screw slag extractor and crawler conveyor; The feeder control device (13) and the pusher plate (14), the pusher plate (14) is fixed on the telescopic rod top of the screw pusher, and the other end of the screw is connected with the screw pusher control device (13), when the motor is started Finally, the screw of the screw pusher rotates, and when clockwise, the screw extends into the furnace body (5) from the outside of the body of furnace (5), and the pushing plate (14) pushes the garbage in the garbage incineration buffer zone (46) To the middle part of the body of furnace (5), in case the rubbish is heated and coked into lumps, stays in the body of furnace (5) and does not fall into the burning high temperature zone (7) of the rubbish for burning; ) retracts; the secondary combustion chamber (43) is made of steel pipe and refractory material, the inner wall of the steel pipe is built with a layer of refractory material (48) for heat preservation, and the outer layer of the steel pipe is equipped with a secondary combustion chamber housing (34). Two air inlets (32) are arranged on the body (34), and a plurality of connected air inlet two (35) are arranged between the interior of the steel pipe and the air duct (33) of the secondary combustion chamber; The buffer area or the air inlet box; the water tank is a conventional boiler water intake or water supply tank, and is equipped with a water level controller and a sight glass inside;

When working, first open the upper gate valve one (1) of the dry garbage feeding bin (2) on the top of the garbage incinerator, close the lower gate valve two (3) of the dry garbage feeding bin (2), and classify the high calorific value "other Dry garbage (hereinafter referred to as dry garbage)" is added into the dry garbage feeding bin (2) through the lifting conveyor, and after opening the lower gate valve 2 (3) of the dry garbage feeding bin (2), the dry garbage falls into the incinerator. Above the water pipe type furnace bridge (16), then close the lower gate valve two (3) of the dry garbage feeding bin (2), open the upper gate valve one (1) of the dry garbage feeding bin (2), and then classify the high calorific value of the community "Other dry garbage (hereinafter referred to as dry garbage) is added into the dry garbage feeding bin (2) by the lifting conveyor, and the upper gate valve one (1) of the dry garbage feeding bin (2) is closed. (5) When adding dry garbage, open the second gate valve (3) of the lower part of the dry garbage feeding bin (2), and the dry garbage will fall downwards into the furnace body (5) of the incinerator, and the garbage incinerator will be fed to the garbage incinerator in the above-mentioned way in a cycle. "Other dry garbage" classified by the community is added in the furnace body (5), and under the pressurization of the blower (23) conveying air, the dry garbage burns in the high-temperature zone (7) in the incinerator to generate a gas that is higher than atmospheric pressure (that is, 3000 -5000pa) positive pressure incineration, when dry waste is incinerated, a large amount of heat is released, and the incineration temperature reaches 900-1100°C;

Open the upper gate valve three (19) of the wet garbage feeding bin (20), close the lower gate valve four (21) of the wet garbage feeding bin (20), and classify the low calorific value "kitchen wet garbage (hereinafter referred to as wet garbage)" from the community Add in the wet garbage feeding bin (20) by the hoisting conveyor, close the upper gate valve three (19) of the wet garbage feeding bin (20), and then open the lower gate valve four (21) of the wet garbage feeding bin (20), and the wet garbage will flow from the wet garbage feeding bin (20). The wet garbage feeding bin (20) falls downwards on the movable fire grate (26), then closes the lower gate valve four (21) of the wet garbage feeding bin (20), opens the gate valve three (19), and then the wet garbage sorted out by the community Garbage is added in the wet garbage feeding bin (20) by the lifting conveyor, and the upper gate valve three (19) of the wet garbage feeding bin (20) is closed, and when wet garbage needs to be added on the movable grate (26), the wet garbage is opened again. The gate valve four (21) at the lower part of the garbage feeding bin (20) allows the wet garbage to fall downwards onto the movable grate (26), and the wet garbage is added to the movable grate (26) in the above-mentioned manner for drying and dehydration. Become dry rubbish, the wet rubbish on the movable fire grate (26) is subjected to the effect of heat radiation and heat transfer of the incineration high temperature zone (7) of rubbish, the moisture in the wet rubbish is evaporated, and the wet rubbish is dried and becomes dry rubbish , the dry rubbish is burned to embers in the burning high-temperature zone (7) of the bottom garbage of the body of furnace (5) of the incinerator along with the movement of the movable fire grate (26), and the ash or slag produced by the burning high-temperature zone (7) moves The movement of the fire grate (26) is conveyed to the slag collection tank (30), and the ash or slag is run through the slag conveyor (31), and discharged from the garbage incinerator through the slag outlet (36); the water pipe type furnace bridge ( 16), after the furnace bridge (16) is heated, the water in the water pipe becomes hot water or water vapor for resource utilization of heating; when the garbage is burned in the incinerator, an electric screw pusher plate (14) is used to remove In the incinerator, the heated mounds and agglomerated rubbish are pushed and loosened for normal incineration; the fire viewing camera probe (18) is arranged on the garbage incinerator to facilitate the control of the air intake of the blower (23) and to control the temperature in the incinerator and waste incineration to ashes;

The dry waste is incinerated at a positive pressure higher than atmospheric pressure (ie 3000-5000pa) in the high temperature zone (7) of the incinerator, and the open flame smoke generated by the incineration is discharged into the secondary combustion chamber (43) from the flue gas outlet (38). In the secondary combustion chamber (43), the positive pressure air sent by the blower (23) and the dioxin, carbon monoxide and organic waste in the flue gas are further decomposed by the oxidation-reduction reaction of combustion, and the secondary combustion chamber ( 43) After the exhausted high-temperature flue gas is subjected to the standard treatment of conventional rapid cooling and heat exchange, lye spray tower deacidification, electrostatic dust removal and activated carbon adsorption, the standard flue gas is discharged to the environment through the chimney; All indicators have reached the emission standards of the national standard GB18485-2014 "Pollution Control Standards for Domestic Waste Incineration". Among them, the content of dioxin is 0.051TEQng/Nm ³ , the content of carbon monoxide (CO) is less than 3mg/m ³ , and the blackness of smoke (Green Mann level) is less than 1.

Claims (1)

1. A positive-pressure garbage incinerator with a movable grate and a secondary combustion chamber, comprising: a furnace body (5) of the incinerator, a wet garbage feeding bin (20), a dry garbage feeding bin (2), a pusher device, water tube type furnace bridge (16), water tank (9), secondary combustion chamber (43), movable fire grate (26), slag conveyor (31) and blower (23); it is characterized in that: the furnace of incinerator The flue gas outlet (47) at the lower part of the body (5) communicates with the air inlet of the secondary combustion chamber (43) through a flange (42). The middle of the top is connected, the slag discharge port of the movable fire grate (26) is connected with the feed port of the slag conveyor (31), and the feed port (44) at one end of the movable fire grate shell (24) is connected with the wet garbage feeding bin (20 ), the upper part of the wet garbage feeding bin (20) is equipped with gate valve three (19), the lower part of the wet garbage feeding bin (20) is equipped with gate valve four (21), and the air outlet of the blower (23) passes through the pipeline and the valve One (29) is connected with the shell air inlet two (32) of the secondary combustion chamber (43), and the air outlet of the blower (23) passes through the air inlet (28) of the air bin (27) through the pipeline and valve two (40) The connection is connected; the furnace body (5) of the incinerator is equipped with a dry garbage feeding bin (2) at the top, and the top of the dry garbage feeding bin (2) is equipped with a gate valve one (1) and a gate valve two (3) at the bottom, and the gate valve two (3) ) below is the garbage burning buffer area (46) in the body of heater (5); the water tank (9) is connected with the body of heater (5) upper shell configuration water jacket (10) of the incinerator through pipeline two (45); The furnace body (5) is a cylindrical shell made of metal. The inner wall of the lower part of the furnace body (5) of the incinerator is built with a layer of refractory insulation material (17), and the upper shell of the furnace body (5) of the incinerator is equipped with a water jacket (10). , the middle and lower part in the body of furnace (5) of the incinerator, according to the pusher plate (14) of the pusher device arranged in the horizontal direction, the bottom of the pusher plate (14) is equipped with a water tube type furnace bridge (16), and the water tube type furnace bridge ( 16) Connect and communicate with the water jacket (10) through the water pipe (11), the flue gas outlet (47) of the furnace body is arranged on the side of the furnace body (5) at the bottom of the water pipe type furnace bridge (16), and the air chamber (27) is arranged in the The outer layer of the lower part of the furnace body (5) of the incinerator, the lower part of the furnace body (5) of the incinerator is an incineration high-temperature zone (7), and a plurality of connection links are arranged between the incineration high-temperature zone (7) and the air chamber (27). Air inlet one (22), the gas outlet (4) of the body of heater (5) top of the incinerator communicates with the gas inlet (15) of the body of heater (5) bottom of the incinerator through pipeline one (12); 26), including a reciprocating grate or a chain grate, driven by a motor or a hydraulic motor, the grate shell (24) is a sealed cuboid made of metal, and the movable grate (26) is arranged inside the grate shell (24); Conveyor (31), comprises scraper type slag extractor, screw slag extractor and crawler conveyor; Described pushing device belongs to conventional electric telescopic screw pusher, comprises electric screw pusher control device (13) and the pusher plate (14), the pusher plate (14) is fixed on the telescopic rod top of the screw pusher, and the other end of the screw is connected with the screw pusher control device (13). After starting the motor, the screw pushes The screw rod of feeder rotates, and screw rod stretches in the body of heater (5) from the outside of body of heater (5) during forward rotation, and pusher plate (14) pushes the rubbish in the rubbish incineration buffer area (46) to body of heater ( 5), in order to prevent the garbage from being heated and coked into lumps and stay in the furnace body (5) and not fall down to the high temperature zone (7) of garbage incineration for incineration; when reversing, the screw retracts from the furnace body (5) The secondary combustion chamber (43) is made of steel pipe and refractory material, and the inner wall of the steel pipe is built with a layer of refractory material (48) for insulation, and the outer layer of the steel pipe is equipped with a secondary combustion chamber housing (34), and the housing (34) Air inlet 2 (32) is configured on the top, and multiple connected air inlet holes 2 (35) are arranged between the inside of the steel pipe and the air duct (33) of the secondary combustion chamber; The air inlet box; the water tank is a conventional boiler water inlet or make-up water tank, and is equipped with a water level controller inside.

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