CN118729263A - A boiler ash taking and material return circulation system - Google Patents

Abstract

The invention provides a boiler ash taking and returning circulation system, which relates to the technical field of thermoelectric devices and comprises the following components: the boiler comprises a boiler main body, wherein an inclined feeding pipe is fixedly arranged on the outer end face of the boiler main body, and a gas pipe with a circular ring structure is arranged below the outer end face of the boiler main body; the cyclone separator is characterized in that the upper end part of the cyclone separator is of a cylindrical structure, the middle part of the cyclone separator is of a truncated cone-shaped structure, and the lower end part of the cyclone separator is of a cylindrical structure. According to the invention, the gas in the third connecting pipe is sprayed to the lower end part of the feed back pipe, the gas mixed with powder particles enters the boiler main body from the feed back pipe, the powder and the oxygen can be fully mixed, the powder can be fully combusted, the problem that the separated particles are intensively put into the boiler to ensure that the particles cannot be fully mixed and contacted with air, and when normal-temperature air is directly sprayed to the surface of combusted coal, the temperature of the coal is reduced to ensure that the coal cannot be fully combusted is solved.

Description

A boiler ash taking and material return circulation system

Technical Field

The invention relates to the technical field of thermoelectric devices, and in particular to a boiler ash taking and material returning circulation system.

Background Art

When the coal in the boiler is not completely burned, a large amount of smoke particles will be produced. When these particles are directly discharged into the atmosphere, they will not only cause air pollution but also cause waste of energy. Therefore, these particles are recycled.

Referring to the patent of CN111351032, it relates to a boiler ash taking and returning circulation system, which includes a boiler, the boiler is provided with a cyclone separator, a slag treatment device and a flue gas treatment device, a flue is connected between the cyclone separator and the flue gas treatment device, the flue is connected with a sampling part, the sampling part includes a frame fixedly connected to the flue and a protective door installed on the frame, the protective door and the frame are detachable; the frame is movably provided with an ash taking part, the ash taking part is provided with a handle at one end away from the flue, the handle is provided with a plug-in column for rotating outward, the frame is provided with a plug-in hole for plugging in the plug-in column, and a clamping assembly for clamping the ash taking part is provided between the plug-in column and the frame. Through the above technical scheme, it is possible to facilitate the ash taking operation of the flue gas, reduce the time of high temperature operation of the staff, and ensure the safety of the ash taking work of the staff.

Based on the search of the above patents and combined with the current boiler ash taking device, it is found that the current boiler ash taking and returning system still has the following two shortcomings in use:

First, the cyclone separator collects the particles in the flue gas and puts them back into the boiler. Since the particles are gathered together and put into the boiler, the particles and air cannot be fully mixed and contacted, resulting in low combustion efficiency.

Secondly, when the boiler is burning, a large amount of air needs to be input into the boiler. When this normal temperature air directly enters the boiler, it will absorb part of the heat inside the boiler. When the normal temperature air is directly sprayed onto the surface of the burning coal, the temperature of the coal will drop, making it impossible for the coal to burn fully.

Summary of the invention

In view of this, the present invention provides a boiler ash removal and return circulation system, in which the electric control valve is electrically connected to the controller. When the block is opened, the controller transmits a signal to the electric control valve. At this time, the electric control valve on the surface of the connecting pipe is opened, and the gas inside the third connecting pipe is sprayed to the lower end part of the return pipe. The gas mixed with powder particles enters the boiler body from the return pipe. The powder and oxygen can be fully mixed to allow the powder to be fully burned. The high-temperature gas inside the recovery pipe heats the gas inside the heat absorption pipe, so that the air finally entering the boiler body is hot, which will not reduce the internal temperature of the boiler body, and can allow the coal to be fully burned, thereby improving the utilization efficiency of the coal heat.

The present invention provides a boiler ash taking and returning material circulation system, which specifically includes: a boiler main body;

An inclined feed pipe is fixedly installed on the outer end surface of the boiler body, and a gas delivery pipe with a circular ring structure is installed below the outer end surface of the boiler body;

A cyclone separator, wherein the upper end of the cyclone separator is a cylindrical structure, the middle part of the cyclone separator is a truncated cone structure, and the lower end of the cyclone separator is a cylindrical structure;

A storage box, wherein an inclined smoke return pipe is fixedly installed on one side of the inner end of the storage box, the end of the smoke return pipe is fixedly connected to the boiler body, and an L-shaped material return pipe is fixedly installed on the lower end of the storage box, and the material return pipe is fixedly connected to the boiler body;

A connecting shaft, the connecting shaft is located inside the storage box, and six fan blades are fixedly installed outside the connecting shaft, the six fan blades are arranged in a ring structure, and grooves are evenly opened on the outside of the fan blades;

A dust shield, the dust shield is located at the discharge end of the return pipe, and the top of the dust shield is rotatably connected to the top of the return pipe;

A recovery pipe, a protective cover is fixedly installed on the outside of the recovery pipe, a gap is formed between the protective cover and the recovery pipe, a second connecting pipe is fixedly installed on the top of the recovery pipe, the second connecting pipe is fixedly connected to the top of the cyclone separator, a fixed pipe is fixedly installed below the air inlet end of the second connecting pipe, the fixed pipe is located inside the cyclone separator, and a smoke exhaust pipe is fixedly installed on the lower end of the recovery pipe;

A heat absorption pipe, wherein the heat absorption pipe is located in the gap between the protective cover and the recovery pipe, the air inlet end of the heat absorption pipe is connected to the fan, the air outlet end of the heat absorption pipe is connected to the third connecting pipe, and the third connecting pipe is fixedly connected to the gas delivery pipe;

The driving motor is fixedly mounted on the outside of the vertical pipe of the return pipe, and a stopper is connected to the front end of the driving motor.

Furthermore, a first connecting pipe is fixedly installed on the outer end surface of the cyclone separator, an air inlet end of the first connecting pipe is tangent to the cyclone separator, and the other end of the first connecting pipe is fixedly connected to the boiler body.

Furthermore, the boiler body is connected to the cyclone separator through a first connecting pipe, and the cross-sectional area of the air inlet end of the first connecting pipe is larger than the cross-sectional area of the air outlet end.

Furthermore, a limit block is respectively installed on the inner end surface of the front and rear side panels of the storage box, and the two limit blocks are arranged in a symmetrical structure, and a device groove is opened inside the limit blocks.

Furthermore, a fixing block is respectively installed at the front and rear ends of the connecting shaft, and the two fixing blocks are rotatably connected to the device grooves inside the two limit blocks.

Furthermore, the front and rear ends of the stopper are arc-shaped structures, the outer end surface of the stopper is in contact with the inner end surface of the return pipe, and a pressure sensor is fixedly mounted on the upper end surface of the stopper, and the pressure sensor is electrically connected to the controller.

Furthermore, a fixed baffle is installed at the discharge end of the return pipe, and when the dust baffle is in a vertical state, the inner end surface of the dust baffle is in contact with the fixed baffle.

Furthermore, three coil springs are fixedly installed above the outer end surface of the dust shield, and the upper end surfaces of the three coil springs are fixedly connected to the upper end surface of the return pipe.

Furthermore, four nozzles are fixedly installed on the inner end surface of the gas delivery pipe, and the nozzles are clamped inside the side wall of the boiler body, and the nozzle body is an inclined structure.

Furthermore, a connecting pipe is fixedly installed below the vertical pipe of the return pipe, an electric-controlled valve is fixedly installed on the surface of the connecting pipe, a fourth connecting pipe is fixedly installed on the outer end of the connecting pipe, the fourth connecting pipe is connected to the third connecting pipe, and the electric-controlled valve is electrically connected to the controller.

The present invention provides a boiler ash taking and material returning circulation system, which has the following beneficial effects:

In the present invention, the boiler body and the cyclone separator are connected by a first connecting pipe, and the flue gas burned in the boiler body enters the cyclone separator through the first connecting pipe. The first connecting pipe is a structure that is wide at the front and narrow at the back, so that when the gas moves forward inside the first connecting pipe, the gas flow rate can be increased due to the narrowing of the path. When the accelerated flue gas enters the cyclone separator, it is convenient to separate the particles.

In addition, the middle part of the cyclone separator is a truncated cone structure, so that the dust in the flue gas will hit the inner wall of the cyclone separator and then fall into the storage box at the lower end of the cyclone separator, and a fixed pipe is fixedly installed at the lower position of the air inlet end of the recovery pipe, and the purified flue gas will enter the second connecting pipe from the fixed pipe, and a return smoke pipe is fixedly installed on the inner end face of the storage box, and the end of the return smoke pipe is fixedly connected to the boiler body, so that part of the flue gas entering the storage box will enter the boiler body from the return smoke pipe.

In addition, fan blades are fixedly installed on the outside of the connecting shaft, and part of the gas inside the cyclone separator will enter the storage box. When the airflow hits the surface of the fan blades, the impact force of the airflow can be converted into the kinetic energy of the fan blades. At the same time, part of the airflow can be blocked back to the inside of the cyclone separator. The surface of the fan blades is also evenly provided with grooves, so that the fixed particles that fall on the surface of the fan blades can better fall into the storage box.

In addition, a pressure sensor is installed on the upper end surface of the block. The pressure sensor can sense the change in the weight of the particles inside the storage box. When there are more particles inside the storage box, the pressure sensor can transmit the signal to the controller, and the controller will feed back the signal to the drive motor. The transmission shaft at the front end of the drive motor will drive the block to rotate, and then the powder particles inside the storage box will fall to the lower end of the return pipe.

In addition, the electric control valve is electrically connected to the controller. When the block is opened, the controller will transmit a signal to the electric control valve. At this time, the electric control valve on the surface of the connecting pipe will open, and the gas inside the third connecting pipe will be sprayed to the lower end of the return pipe. The gas mixed with powder particles enters the boiler body from the return pipe. The powder and oxygen can be fully mixed, allowing the powder to burn fully.

The upper end of the dust shield is rotatably connected to the top end of the return pipe, and when the dust shield is in a vertical state, the dust shield fits with the fixed baffle, so that when the electric control valve on the surface of the fourth connecting pipe is not opened, the dust shield can prevent the smoke inside the boiler main body from entering the return pipe, and three coil springs are fixedly installed above the outer end surface of the dust shield. Under the action of the elastic force of the coil springs, the dust shield can fit tightly with the fixed baffle, thereby improving the sealing performance of the dust shield, and when the electric control valve on the surface of the fourth connecting pipe is opened, the gas inside the third connecting pipe will be sprayed into the return pipe. At this time, the dust shield will tilt outward under the impact of the airflow, and the airflow mixed with particles will re-enter the boiler main body.

In addition, four nozzles are installed on the inner end surface of the gas pipe, so that fresh air from the outside can enter the boiler body from the nozzles on the surface of the gas pipe, bringing sufficient oxygen to the combustion of coal. The four nozzles are arranged in a ring structure, so that the air can be blown evenly to the position where the coal is burning, allowing the coal to burn more fully. The heat absorption pipe and the gas pipe are connected by a third connecting pipe. When the fresh air from the outside passes through the heat absorption pipe, the high-temperature gas inside the recovery pipe will heat the gas inside the heat absorption pipe, so that the air that finally enters the boiler body is hot, which will not lower the internal temperature of the boiler body, allowing the coal to burn fully and improving the utilization efficiency of the coal heat.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

In the attached picture:

FIG1 is a schematic diagram of the overall structure of the device of the present invention;

FIG2 is a schematic cross-sectional view of the boiler body and the cyclone separator of the present invention;

FIG3 is a schematic diagram of a partial enlarged structure of point A in FIG2 of the present invention;

FIG4 is a schematic diagram of the structure of the cyclone separator, the first connecting pipe and the boiler body of the present invention;

5 is a schematic diagram of the structure of the second connecting pipe and the fixing pipe of the present invention;

FIG6 is a schematic diagram of the structure of the third connecting pipe and the gas transmission pipe of the present invention;

7 is a schematic diagram of the dust shield and coil spring structure of the present invention;

FIG8 is a schematic diagram of the internal structure of the storage box of the present invention;

FIG. 9 is a schematic diagram of the structure of the heat absorbing pipe, the third connecting pipe and the gas transmission pipe of the present invention.

Reference numerals:

1. Boiler body; 101. Feed pipe; 2. Cyclone separator; 201. First connecting pipe; 3. Storage box; 301. Smoke return pipe; 302. Return pipe; 3021. Fixed baffle; 4. Limit block; 401. Device slot; 5. Connecting shaft; 501. Fixed block; 502. Fan blade; 5021. Groove; 6. Dust shield; 601. Coil spring; 7. Recovery pipe; 701. Second connecting pipe; 7011. Fixed pipe; 702. Smoke exhaust pipe; 8. Protective cover; 9. Heat absorption pipe; 10. Third connecting pipe; 11. Gas pipe; 1101. Nozzle; 12. Drive motor; 1201. Block; 1202. Pressure sensor; 13. Connecting pipe; 1301. Fourth connecting pipe; 1302. Electric control valve.

DETAILED DESCRIPTION

The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of specific embodiments of the present invention.

Embodiment 1: Please refer to Figures 1 to 9:

The present invention provides a boiler ash taking and material returning circulation system, comprising a boiler main body 1;

An inclined feed pipe 101 is fixedly installed on the outer end surface of the boiler body 1, and a circular gas delivery pipe 11 is installed below the outer end surface of the boiler body 1;

A cyclone separator 2, wherein the upper end of the cyclone separator 2 is a cylindrical structure, the middle portion of the cyclone separator 2 is a truncated cone structure, and the lower end of the cyclone separator 2 is a cylindrical structure;

A storage box 3, an inclined smoke return pipe 301 is fixedly installed on one side of the inner end of the storage box 3, the end of the smoke return pipe 301 is fixedly connected to the boiler body 1, and an L-shaped return pipe 302 is fixedly installed on the lower end of the storage box 3, and the return pipe 302 is fixedly connected to the boiler body 1;

The connecting shaft 5 is located inside the storage box 3. Six fan blades 502 are fixedly installed outside the connecting shaft 5. The six fan blades 502 are arranged in an annular structure. The outside of the fan blades 502 is evenly provided with grooves 5021.

A dust shield 6, the dust shield 6 is located at the discharge end of the return pipe 302, and the top end of the dust shield 6 is rotatably connected to the top end of the return pipe 302;

Recovery pipe 7, a protective cover 8 is fixedly installed on the outside of the recovery pipe 7, a gap is present between the protective cover 8 and the recovery pipe 7, a second connecting pipe 701 is fixedly installed on the top of the recovery pipe 7, the second connecting pipe 701 is fixedly connected to the top of the cyclone separator 2, a fixed pipe 7011 is fixedly installed below the air inlet end of the second connecting pipe 701, the fixed pipe 7011 is located inside the cyclone separator 2, and a smoke exhaust pipe 702 is fixedly installed on the lower end of the recovery pipe 7;

The heat absorption pipe 9 is located in the gap between the protective cover 8 and the recovery pipe 7. The air inlet end of the heat absorption pipe 9 is connected to the fan, and the air outlet end of the heat absorption pipe 9 is connected to the third connecting pipe 10. The third connecting pipe 10 is fixedly connected to the gas delivery pipe 11;

The driving motor 12 is fixedly mounted on the outside of the vertical tube of the return tube 302 , and the front end of the driving motor 12 is transmission-connected with a stopper 1201 .

Among them, a first connecting pipe 201 is fixedly installed on the outer end surface of the cyclone separator 2, the air inlet end of the first connecting pipe 201 is tangent to the cyclone separator 2, and the other end of the first connecting pipe 201 is fixedly connected to the boiler body 1. The boiler body 1 is connected to the cyclone separator 2 through the first connecting pipe 201, and the cross-sectional area of the air inlet end of the first connecting pipe 201 is larger than the cross-sectional area of the air outlet end.

By adopting the above scheme, the technical effect brought about is: when the coal is not completely burned, the flue gas contains a large amount of solid particles. If these particles are directly discharged into the atmosphere, it will not only cause air pollution, but also cause energy waste. The boiler body 1 and the cyclone separator 2 are connected through the first connecting pipe 201. The flue gas burned by the boiler body 1 will enter the cyclone separator 2 through the first connecting pipe 201. The first connecting pipe 201 is a structure that is wide at the front and narrow at the back. When the gas moves forward inside the first connecting pipe 201, the gas flow rate can be increased due to the narrowing of the path. When the flue gas is accelerated After entering the cyclone separator 2, since the middle part of the cyclone separator 2 is a truncated cone structure, the dust in the flue gas will hit the inner wall of the cyclone separator 2 and then fall into the storage box 3 at the lower end of the cyclone separator 2. A fixed pipe 7011 is fixedly installed at the lower position of the air inlet end of the recovery pipe 7, and the purified flue gas will enter the second connecting pipe 701 from the fixed pipe 701. A return smoke pipe 301 is fixedly installed on the inner end surface of the storage box 3, and the end of the return smoke pipe 301 is fixedly connected to the boiler body 1, so that part of the flue gas entering the storage box 3 will enter the boiler body 1 from the return smoke pipe 301.

Among them, a fixed baffle 3021 is installed at the discharge end of the return tube 302. When the dust shield plate 6 is in a vertical state, the inner end surface of the dust shield plate 6 is in contact with the fixed baffle 3021. Three coil springs 601 are fixedly installed above the outer end surface of the dust shield plate 6. The upper end surfaces of the three coil springs 601 are fixedly connected to the upper end surface of the return tube 302.

By adopting the above scheme, the technical effect brought about is: the upper end of the dust shield plate 6 is rotatably connected to the top end of the return pipe 302, and when the dust shield plate 6 is in a vertical state, the dust shield plate 6 fits with the fixed baffle 3021, so that when the electric control valve 1302 on the surface of the fourth connecting pipe 1301 is not opened, the dust shield plate 6 can prevent the smoke inside the boiler body 1 from entering the return pipe 302, and three coil springs 601 are fixedly installed above the outer end surface of the dust shield plate 6. Under the action of the elastic force of the coil spring 601, the dust shield plate 6 can fit tightly with the fixed baffle 3021, thereby improving the sealing performance of the dust shield plate 6, and when the electric control valve 1302 on the surface of the fourth connecting pipe 1301 is opened, the gas inside the third connecting pipe 10 will be sprayed into the return pipe 302. At this time, the dust shield plate 6 will tilt outward under the impact of the airflow, and the airflow mixed with particles will re-enter the boiler body 1.

Among them, four nozzles 1101 are fixedly installed on the inner end surface of the gas delivery pipe 11. The nozzles 1101 are clamped inside the side wall of the boiler body 1, and the main body of the nozzles 1101 is an inclined structure.

By adopting the above scheme, the technical effect brought about is: four nozzles 1101 are installed on the inner end surface of the gas pipe 11, so that fresh air from the outside can enter the boiler body 1 from the nozzles 1101 on the surface of the gas pipe 11, bringing sufficient oxygen to the combustion of coal. The four nozzles 1101 are arranged in a ring structure, so that the air can be evenly blown to the position where the coal is burning, allowing the coal to burn more fully. The heat absorption pipe 9 and the gas pipe 11 are connected by the third connecting pipe 10. When the fresh air from the outside passes through the heat absorption pipe 9, the high-temperature gas inside the recovery pipe 7 will heat the gas inside the heat absorption pipe 9, so that the air finally entering the boiler body 1 is hot, which will not reduce the internal temperature of the boiler body 1, and can improve the utilization efficiency of the coal heat.

Embodiment 2: The present invention provides a boiler ash removal and material return circulation system, based on Embodiment 1, as shown in Figures 1-9, further comprising: wherein, a limit block 4 is respectively installed on the inner end faces of the front and rear side plates of the storage box 3, and the two limit blocks 4 are arranged in a symmetrical structure, and a device groove 401 is opened inside the limit block 4, and a fixed block 501 is respectively installed at the front and rear ends of the connecting shaft 5, and the two fixed blocks 501 are respectively rotatably connected in the device grooves 401 inside the two limit blocks 4.

By adopting the above scheme, the technical effect brought about is: two limit blocks 4 are symmetrically installed inside the storage box 3, and a device groove 401 is opened inside the limit block 4. The two ends of the connecting shaft 5 are rotatably connected to the inside of the device groove 401 inside the limit block 4, and the outside of the connecting shaft 5 is fixedly installed with a fan blade 502. Part of the gas inside the cyclone separator 2 will enter the storage box 3. When the airflow hits the surface of the fan blade 502, the impact force of the airflow can be converted into the kinetic energy of the fan blade 502. At the same time, part of the airflow can be blocked back to the inside of the cyclone separator 2. The surface of the fan blade 502 is also evenly provided with grooves 5021, so that the fixed particles falling on the surface of the fan blade 502 can better fall into the storage box 3.

Embodiment 3: The present invention provides a boiler ash removal and material return circulation system, which, based on Embodiment 1, as shown in Figures 1-9, also includes: wherein the front and rear ends of the block 1201 are arc-shaped structures, the outer end face of the block 1201 is in contact with the inner end face of the return pipe 302, and the upper end face of the block 1201 is fixedly mounted with a pressure sensor 1202, and the pressure sensor 1202 is electrically connected to the controller.

By adopting the above scheme, the technical effect brought about is: a pressure sensor 1202 is installed on the upper end face of the block 1201, and the pressure sensor 1202 can sense the change in the weight of the particles inside the storage box 3. When there are more particles inside the storage box 3, the pressure sensor 1202 can transmit the signal to the controller, and the controller will feed back the signal to the drive motor 12. The transmission shaft at the front end of the drive motor 12 will drive the block 1201 to rotate, and then the powder particles inside the storage box 3 will fall to the lower end part of the return pipe 302. After the particles have finished falling, the drive motor 12 drives the block 1201 to reverse, and the block 1201 blocks the upper end of the return pipe 302.

Embodiment 4: The present invention provides a boiler ash removal and return circulation system. Based on Embodiment 1, as shown in Figures 1 to 9, it also includes: a connecting pipe 13 is fixedly installed below the vertical pipe of the return pipe 302, an electric-controlled valve 1302 is fixedly installed on the surface of the connecting pipe 13, a fourth connecting pipe 1301 is fixedly installed on the outer end of the connecting pipe 13, the fourth connecting pipe 1301 is connected to the third connecting pipe 10, and the electric-controlled valve 1302 is electrically connected to the controller.

By adopting the above scheme, the technical effect brought about is: when the particles inside the storage box 3 fall downward, the controller will also transmit a signal to the electric control valve 1302. At this time, the electric control valve 1302 on the surface of the connecting pipe 13 will open, and the gas inside the third connecting pipe 10 will be sprayed to the lower end part of the return pipe 302. The gas mixed with powder particles enters the boiler body 1 from the return pipe 302, and the powder and oxygen can be fully mixed, allowing the powder to be fully burned.

Specific usage and function of this embodiment: In the present invention, when the coal inside the boiler body 1 is not completely burned, the flue gas will contain a large amount of solid particles. If these particles are directly discharged into the atmosphere, it will not only cause air pollution, but also cause energy waste. The boiler body 1 and the cyclone separator 2 are connected through the first connecting pipe 201. The flue gas burned by the boiler body 1 will enter the cyclone separator 2 through the first connecting pipe 201. The first connecting pipe 201 is a structure with a wide front and a narrow back, so that the gas moves inside the first connecting pipe 201. At this time, the flow rate of the gas can be increased due to the narrowing of the path. When the flue gas after the acceleration enters the cyclone separator 2, since the middle part of the cyclone separator 2 is a truncated cone structure, the dust in the flue gas will hit the inner wall of the cyclone separator 2, and then fall into the storage box 3 at the lower end of the cyclone separator 2, and a fixed pipe 7011 is fixedly installed below the air inlet end of the recovery pipe 7, and the purified flue gas will enter the second connecting pipe 701 from the fixed pipe 7011, and the inner end surface of the storage box 3 is fixedly installed with a return smoke pipe 301, and the end of the return smoke pipe 301 is connected to the second connecting pipe 701. The boiler body 1 is fixedly connected so that part of the flue gas entering the storage box 3 will enter the boiler body 1 from the smoke return pipe 301. Two limit blocks 4 are symmetrically installed inside the storage box 3. The limit blocks 4 are provided with installation grooves 401. Both ends of the connecting shaft 5 are rotatably connected to the installation grooves 401 inside the limit blocks 4, and the outside of the connecting shaft 5 is fixedly installed with fan blades 502. Part of the gas inside the cyclone separator 2 will enter the storage box 3. When the airflow hits the surface of the fan blade 502, the impact force of the airflow can be converted into kinetic energy of the fan blade 502. At the same time, part of the airflow can be blocked back to the inside of the cyclone separator 2, and the surface of the fan blade 502 is evenly provided with grooves 5021, so that the fixed particles falling on the surface of the fan blade 502 can fall into the storage box 3 better. The upper end surface of the block 1201 is installed with a pressure sensor 1202, and the pressure sensor 1202 can sense the change in the weight of the particles inside the storage box 3. When there are more particles inside the storage box 3, the pressure sensor 1202 can transmit the signal to the controller, and the controller will feed back the signal to the drive motor 12, and the drive motor 1 The transmission shaft at the front end of the second connection pipe 13 drives the stopper 1201 to rotate, and then the powder particles in the storage box 3 fall to the lower end of the return pipe 302. After the particles have fallen, the driving motor 12 drives the stopper 1201 to reverse, and the stopper 1201 blocks the upper end of the return pipe 302. When the particles in the storage box 3 fall downward, the controller also transmits a signal to the electric control valve 1302. At this time, the electric control valve 1302 on the surface of the connecting pipe 13 opens, and the gas in the third connecting pipe 10 is sprayed to the lower end of the return pipe 302, and the powder particles mixed with the gas are discharged. The gas of the particles enters the interior of the boiler body 1 from the return pipe 302, and the powder and oxygen can be fully mixed, so that the powder can be fully burned. The upper end of the dust shield 6 is rotatably connected to the top of the return pipe 302, and when the dust shield 6 is in a vertical state, the dust shield 6 fits with the fixed baffle 3021, so that when the electric control valve 1302 on the surface of the fourth connecting pipe 1301 is not opened, the dust shield 6 can prevent the smoke inside the boiler body 1 from entering the interior of the return pipe 302, and three coil springs 601 are fixedly installed above the outer end surface of the dust shield 6. Under the action of elastic force, the dust shield 6 can be closely fitted with the fixed baffle 3021, thereby improving the sealing performance of the dust shield 6. When the electric control valve 1302 on the surface of the fourth connecting pipe 1301 is opened, the gas inside the third connecting pipe 10 will be sprayed into the return pipe 302. At this time, the dust shield 6 will tilt outward under the impact of the airflow, and the airflow mixed with particles will re-enter the boiler body 1. Four nozzles 1101 are installed on the inner end surface of the gas delivery pipe 11, so that fresh air from the outside can enter the boiler from the nozzles 1101 on the surface of the gas delivery pipe 11 The inside of the main body 1 provides sufficient oxygen for the combustion of coal. The four nozzles 1101 are arranged in a ring structure, so that the air can be blown evenly to the position where the coal is burning, allowing the coal to burn more fully. The heat absorption pipe 9 and the gas pipe 11 are connected by a third connecting pipe 10. When the fresh air from the outside passes through the heat absorption pipe 9, the high-temperature gas inside the recovery pipe 7 will heat the gas inside the heat absorption pipe 9, so that the air that finally enters the boiler main body 1 is hot, which will not reduce the internal temperature of the boiler main body 1, and can improve the utilization efficiency of the coal heat.

Claims (10)

1. A boiler ash taking and returning circulation system, characterized in that it comprises: a boiler body (1), the outer end surface of the boiler body (1) is fixedly mounted with an inclined feed pipe (101), and a gas delivery pipe (11) with a circular ring structure is mounted below the outer end surface of the boiler body (1); a cyclone separator (2), the upper end of the cyclone separator (2) is a cylindrical structure, the middle part of the cyclone separator (2) is a truncated cone structure, and the lower end of the cyclone separator (2) is a cylindrical structure; a storage box (3), the inner end of the storage box (3) is fixedly mounted with an inclined An oblique smoke return pipe (301), the end of which is fixedly connected to the boiler body (1); a return pipe (302) of an L-shaped structure is fixedly installed at the lower end of the storage box (3); the return pipe (302) is fixedly connected to the boiler body (1); a connecting shaft (5), the connecting shaft (5) is located inside the storage box (3); six fan blades (502) are fixedly installed outside the connecting shaft (5); the six fan blades (502) are arranged in an annular structure, and grooves (5021) are evenly opened on the outside of the fan blades (502); a dust shield (6), the dust shield ( 6) is located at the discharge end of the return pipe (302), the top end of the dust shield (6) is rotatably connected to the top end of the return pipe (302); a recovery pipe (7), a protective cover (8) is fixedly installed on the outside of the recovery pipe (7), a gap exists between the protective cover (8) and the recovery pipe (7), a second connecting pipe (701) is fixedly installed on the top end of the recovery pipe (7), the second connecting pipe (701) is fixedly connected to the top end of the cyclone separator (2), a fixed pipe (7011) is fixedly installed below the air inlet end of the second connecting pipe (701), and the fixed pipe (7011) is located at the cyclone separator Inside the separator (2), a smoke exhaust pipe (702) is fixedly installed at the lower end of the pipe recovery pipe (7); a heat absorption pipe (9), the heat absorption pipe (9) is located in the gap between the protective cover (8) and the recovery pipe (7), the air inlet end of the heat absorption pipe (9) is connected to the fan, the air outlet end of the heat absorption pipe (9) is connected to the third connecting pipe (10), and the third connecting pipe (10) is fixedly connected to the gas supply pipe (11); a drive motor (12), the drive motor (12) is fixedly installed on the outside of the vertical pipe of the return pipe (302), and the front end of the drive motor (12) is transmission-connected with a stopper (1201). 2. A boiler ash removal and return circulation system as claimed in claim 1, characterized in that a first connecting pipe (201) is fixedly installed on the outer end surface of the cyclone separator (2), the air inlet end of the first connecting pipe (201) is tangential to the cyclone separator (2), and the other end of the first connecting pipe (201) is fixedly connected to the boiler body (1). 3. A boiler ash removal and return circulation system as claimed in claim 1, characterized in that: the boiler body (1) is connected to the cyclone separator (2) through a first connecting pipe (201), and the cross-sectional area of the air inlet end of the first connecting pipe (201) is larger than the cross-sectional area of the air outlet end. 4. A boiler ash removal and return circulation system as claimed in claim 1, characterized in that: a limit block (4) is respectively installed on the inner end surface of the front and rear side plates of the storage box (3), the two limit blocks (4) are arranged in a symmetrical structure, and a device groove (401) is opened inside the limit block (4). 5. A boiler ash removal and return circulation system as claimed in claim 1, characterized in that: a fixing block (501) is respectively installed at the front and rear ends of the connecting shaft (5), and the two fixing blocks (501) are respectively rotatably connected in the device grooves (401) inside the two limit blocks (4). 6. A boiler ash removal and return circulation system as described in claim 1, characterized in that: the front and rear ends of the block (1201) are arc-shaped structures, the outer end surface of the block (1201) is in contact with the inner end surface of the return pipe (302), and a pressure sensor (1202) is fixedly installed on the upper end surface of the block (1201), and the pressure sensor (1202) is electrically connected to the controller. 7. A boiler ash removal and return circulation system as described in claim 1, characterized in that a fixed baffle (3021) is installed at the discharge end of the return pipe (302), and when the dust baffle (6) is in a vertical state, the inner end surface of the dust baffle (6) is in contact with the fixed baffle (3021). 8. A boiler ash removal and return circulation system as claimed in claim 1, characterized in that three coil springs (601) are fixedly installed above the outer end surface of the dust shield (6), and the upper end surfaces of the three coil springs (601) are fixedly connected to the upper end surface of the return pipe (302). 9. A boiler ash removal and return circulation system as claimed in claim 1, characterized in that four nozzles (1101) are fixedly installed on the inner end surface of the gas supply pipe (11), the nozzles (1101) are clamped inside the side wall of the boiler body (1), and the nozzle (1101) body is an inclined structure. 10. A boiler ash removal and return circulation system as described in claim 1, characterized in that: a connecting pipe (13) is fixedly installed below the vertical pipe of the return pipe (302), an electric control valve (1302) is fixedly installed on the surface of the connecting pipe (13), a fourth connecting pipe (1301) is fixedly installed on the outer end of the connecting pipe (13), the fourth connecting pipe (1301) is connected to the third connecting pipe (10), and the electric control valve (1302) is electrically connected to the controller.