A flue gas treatment device for a biomass boiler

Abstract

The utility model relates to a boiler flue gas treatment technical field especially is a kind of flue gas treatment device for biomass boiler, including boiler body, the right end surface of boiler body is fixedly connected with gas pipe, the outer side of the one end of gas pipe away from boiler body is fixedly connected with initial filter box, the left top of initial filter box front end surface is fixedly connected with input pipe, initial filter box front end surface middle left is fixedly connected with output pipe;The design cooperation of initial filter box and output pipe makes the device can guide the flue gas generated by combustion in boiler body into the water in initial filter box, filters the sticky impurities such as tar substance, alkali metal salt mixture and wet dust in biomass flue gas by water, effectively avoids the sticky impurities in biomass flue gas adhere to the inner wall of subsequent processing equipment, leads to the situation of increasing cleaning difficulty.

Description

Technical Field

[0001] This utility model relates to the field of boiler flue gas treatment technology, and in particular to a flue gas treatment device for biomass boilers. Background Technology

[0002] A biomass boiler is a thermal energy device that uses renewable organic materials such as biomass fuels, such as straw, sawdust, rice husks, and forestry waste, as its energy source. It generates heat by burning biomass fuels for heating, power generation, or industrial production. During the combustion process, it releases flue gas containing pollutants such as tar, alkali metal salts, and dust. Compared with traditional coal-fired boilers, biomass boilers have advantages such as being carbon neutral, renewable, and environmentally friendly.

[0003] Patent specification CN222752798U discloses a flue gas treatment device for a biomass boiler. The device includes a flue gas treatment chamber, with a biomass boiler body mounted on one side of the chamber. A flue gas pipe is fixedly connected to one side of the boiler body. This invention utilizes components such as a brush, protective shell, striking ball, and lifting plate. A rotating shaft drives the shell and brush to rotate. The brush agitates the bottom of the filter screen, removing solid dust particles adhering to it. The rotating shaft drives the lifting plate to rotate, lifting the striking ball and dropping it onto the top of the protective shell to strike the shell and filter screen, further removing dust and impurities adhering to the gaps at the bottom of the filter screen. These impurities fall into the ash collection hopper and are discharged through the cleaning pipe. This automatic removal of dust and impurities prevents clogging, eliminates the need for disassembly and manual cleaning, and is more time-saving, labor-saving, and practical.

[0004] However, in implementing the relevant technology, the following problems were found with the aforementioned flue gas treatment device for biomass boilers: the flue gas generated during the combustion process of current biomass boilers contains a large amount of sticky impurities, such as tar-like substances, alkali metal salt mixtures, and wettable dust. These impurities easily adhere to the inner wall of the subsequent flue gas treatment equipment, which not only reduces the heat transfer efficiency and treatment effect of the equipment, but also causes equipment blockage due to impurity accumulation, seriously affecting the normal operation of the equipment; most of the aforementioned flue gas treatment devices adopt dry filtration dust removal methods, which are difficult to effectively remove these sticky impurities. Moreover, due to the characteristics of sticky substances, conventional cleaning methods are often unable to completely remove the impurities adhering to the inner wall of the equipment, resulting in high equipment maintenance costs, short cleaning cycles, and low operating efficiency; in addition, frequent cleaning and maintenance will also increase equipment downtime, affecting the continuous and stable operation of the biomass boiler system. In view of this, a flue gas treatment device for biomass boilers is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a flue gas treatment device for biomass boilers.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a flue gas treatment device for a biomass boiler, comprising a boiler body, a gas supply pipe fixedly connected to the right end face of the boiler body, a primary filter box fixedly connected to the outer side of the end of the gas supply pipe away from the boiler body, an input pipe fixedly connected to the top left side of the front end face of the primary filter box, and an output pipe fixedly connected to the middle left side of the front end face of the primary filter box.

[0007] As a further description of the above technical solution: a first observation window is provided in the middle of the front end face of the primary filter box; a hollow shell is fixedly connected to the middle of the top of the primary filter box; a motor is fixedly connected to the rear end face of the hollow shell; a bidirectional threaded rod is fixedly connected to the output end of the motor; a moving block is helically connected to the outer side of the bidirectional threaded rod; a connecting rod is rotatably connected to the bottom of the moving block; a defoaming plate is rotatably connected to the end of the connecting rod away from the moving block; a defoaming needle is fixedly connected to the bottom of the defoaming plate; an exhaust pipe is fixedly connected to the middle of the top right side of the defoaming plate; the middle of the left side inside the defoaming plate is slidably connected to the outer side below the air supply pipe; and the bidirectional threaded rod is located away from the motor. One end is rotatably connected to the middle of the front side inside the hollow shell, the surface of the moving block is slidably connected to the inner wall of the hollow shell, the middle of the lower part of the hollow shell is slidably connected to the middle of the upper part of the primary filter box, the edge of the defoaming plate is slidably connected to the inner wall of the upper part of the primary filter box, and the middle of the upper right side of the inner part of the primary filter box is fixedly connected to the outer side of the lower part of the exhaust pipe. The flue gas generated by combustion in the boiler body can be introduced into the water in the primary filter box to filter out sticky impurities in the biomass flue gas, such as tar-like substances, alkali metal salt mixtures, and wettable dust, effectively preventing sticky impurities in the biomass flue gas from adhering to the inner wall of subsequent treatment equipment, which would increase the difficulty of cleaning.

[0008] As a further description of the above technical solution: the end of the gas supply pipe away from the boiler body is located on the lower left side inside the primary filter box. The defoaming plate has a through hole from top to bottom in the middle of the left side, and the diameter of the through hole exceeds the outer diameter of the gas supply pipe by 2cm. This allows the gas supply pipe to not affect the normal up-and-down movement of the defoaming plate when it is moved up and down by the bidirectional threaded rod and the moving block, while also preventing large foam from appearing in the gap between the gas supply pipe and the defoaming plate.

[0009] As a further description of the above technical solution: an exhaust hole is provided in the middle of the right side of the defoaming plate, and the diameter of the exhaust hole matches the inner diameter of the bottom end of the exhaust pipe inside the primary filter box. The exhaust pipe and the defoaming plate are connected and fixed by a corrugated pipe. The corrugated pipe allows the bottom of the exhaust pipe to deform as the defoaming plate moves, so that the exhaust hole on the right side of the defoaming plate is always connected to the exhaust pipe.

[0010] As a further description of the above technical solution: A groove is provided from front to back in the lower middle of the hollow shell and the upper middle of the primary filter box, and the width of the groove matches the cross-sectional diameter of the connecting rod. The defoaming plate has several defoaming needles at its bottom, each 3cm in length. The movement of the moving block on the outside of the bidirectional threaded rod, via the connecting rod, moves the defoaming plate and defoaming needles inside the primary filter box up and down. The operator can observe the water level in the primary filter box through the first observation window, keeping the bottom of the defoaming needles flush with the water surface. This effectively prevents large bubbles from appearing on the water surface when viscous impurities in the biomass flue gas are discharged into the primary filter box through the gas delivery pipe.

[0011] As a further description of the above technical solution: an anti-backflow hopper is provided inside the exhaust pipe at one end near the boiler body; a sealing plug is spirally connected to the lower part of the exhaust pipe at one end near the boiler body; a water pump is fixedly connected to the rear left side of the top of the primary filter box; a water pump is fixedly connected to the input end of the water pump; the end of the water pump away from the water pump is fixedly connected to the lower rear side of the interior of the primary filter box; a water delivery pipe is fixedly connected to the output end of the water pump; the end of the water delivery pipe away from the water pump is fixedly connected to the upper part of the interior of the gas delivery pipe; a second observation window is provided on the front side of the end of the gas delivery pipe near the boiler body, which can flush the area with corners in the center of the gas delivery pipe, washing away sticky impurities in the biomass flue gas that easily adhere to the inner wall of the gas delivery pipe, thus avoiding the situation where the center of the gas delivery pipe is not easy to clean when the operator maintains the gas delivery pipe.

[0012] As a further description of the above technical solution: there are two sets of anti-backflow buckets, and the anti-backflow buckets are arranged facing each other on the inner wall of the gas transmission pipe in a manner that is wider on the outside and narrower on the inside. The sealing plug is located below the two sets of anti-backflow buckets. The end of the water transmission pipe inside the gas transmission pipe is located on the right side of the anti-backflow bucket. This can prevent water from flowing into the boiler body through the gas transmission pipe when the water flow impacts the inner wall of the gas transmission pipe. When cleaning the gas transmission pipe, the sealing plug below the end of the gas transmission pipe near the boiler body can be opened to discharge the water remaining between the two sets of anti-backflow buckets downwards, avoiding the situation where water enters between the two sets of anti-backflow buckets and is difficult to discharge.

[0013] This utility model has the following beneficial effects:

[0014] This utility model designs a flue gas treatment device for biomass boilers. Through the coordinated design of the pre-filter box and the output pipe, the device can guide the flue gas generated by combustion within the boiler body into the water within the pre-filter box. This filters out sticky impurities in the biomass flue gas, such as tar-like substances, alkali metal salt mixtures, and moist dust, effectively preventing these impurities from adhering to the inner walls of subsequent treatment equipment and increasing cleaning difficulty. A motor and a bidirectional threaded rod are installed at the top of the pre-filter box. The movement of the movable block on the outside of the bidirectional threaded rod, via a connecting rod, drives the defoaming plate and defoaming device inside the pre-filter box. As the defoaming needle moves up and down, the operator can observe the water level in the primary filter box through the first observation window. Keeping the bottom of the defoaming needle flush with the water surface effectively prevents large bubbles from forming on the water surface when sticky impurities in the biomass flue gas are discharged into the primary filter box through the gas delivery pipe. The generation of large bubbles occupies the effective gas-liquid contact area, reducing the collection efficiency of sticky impurities in the biomass flue gas. Sticky impurities and particulate impurities in the biomass flue gas are filtered by water, and the remaining flue gas is discharged to the next treatment equipment outside the primary filter box through the exhaust pipe set on the top right side of the defoaming plate, which improves the collection efficiency of sticky impurities in the biomass flue gas to a certain extent.

[0015] This utility model designs a flue gas treatment device for biomass boilers. Through the coordinated design of the water pump and water pipe, the device can flush the corner area in the center of the gas pipe, washing away sticky impurities in the biomass flue gas that easily adhere to the inner wall of the gas pipe. This avoids the situation where the center of the gas pipe is difficult to clean when the operator maintains the gas pipe. Two sets of opposing anti-backflow buckets are set inside the gas pipe near the filter body to prevent water from flowing into the boiler body when the water flow impacts the inner wall of the gas pipe. When cleaning the gas pipe, the sealing plug at the lower end of the gas pipe near the boiler body can be opened to discharge the water remaining between the two sets of anti-backflow buckets downwards, avoiding the situation where water enters between the two sets of anti-backflow buckets and is difficult to discharge. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the primary filter box of this utility model rotated 180° laterally.

[0018] Figure 3 This is a schematic diagram of the longitudinal cross-sectional structure of the primary filter box of this utility model;

[0019] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of the hollow shell of this utility model;

[0020] Figure 5 This is a schematic diagram of the defoaming board structure of this utility model, which is rotated 180° longitudinally.

[0021] Figure 6 This is a schematic diagram of the longitudinal cross-sectional structure of the gas pipeline of this utility model.

[0022] Legend:

[0023] 1. Boiler body; 2. Gas supply pipe; 3. Pre-filter box; 4. Exhaust pipe; 5. Input pipe; 6. Output pipe; 7. First observation window; 8. Hollow shell; 9. Motor; 10. Water pump; 11. Pumping pipe; 12. Water supply pipe; 13. Two-way threaded rod; 14. Moving block; 15. Defoaming plate; 16. Defoaming needle; 17. Second observation window; 18. Sealing plug; 19. Connecting rod; 20. Anti-backflow hopper. Detailed Implementation

[0024] Reference Figures 1 to 6 The present invention provides a flue gas treatment device for a biomass boiler, including a boiler body 1. The right end face of the boiler body 1 is connected to a gas supply pipe 2 through a flange. The outer side of the gas supply pipe 2 away from the boiler body 1 is inserted into the upper left side of the primary filter box 3 and fixed. The top left side of the front end face of the primary filter box 3 is penetrated and fixed by an input pipe 5. The middle left side of the front end face of the primary filter box 3 is penetrated and fixed by an output pipe 6.

[0025] A first observation window 7 is set in the middle of the front face of the primary filter box 3. The hollow shell 8 is fixed to the middle of the top of the primary filter box 3 by bolts. The motor 9 is fixed to the rear face of the hollow shell 8 by bolts. The output shaft of the motor 9 passes through the interior of the bidirectional threaded rod 13 and is fixed. The outer side of the bidirectional threaded rod 13 passes through the interior of the moving block 14 and is screwed with the internal thread of the moving block 14. The bottom of the moving block 14 is connected to the connecting rod 19 through a rotating shaft. The end of the connecting rod 19 away from the moving block 14 is connected to the defoaming plate 15 through a rotating shaft. The bottom of the defoaming plate 15 is welded with a defoaming needle 16. The middle of the right side of the top of the defoaming plate 15 is penetrated and fixed by the exhaust pipe 4. The middle of the left side of the interior of the defoaming plate 15 is slidably connected to the outer side below the air supply pipe 2. The end of 13 away from the motor 9 is rotatably connected to the middle of the front side inside the hollow shell 8. The surface of the moving block 14 is slidably connected to the inner wall of the hollow shell 8. The middle of the lower part of the hollow shell 8 is slidably connected to the middle of the upper part of the primary filter box 3. The edge of the defoaming plate 15 is slidably connected to the inner wall of the upper part of the primary filter box 3. The middle of the upper right side inside the primary filter box 3 is fixedly connected to the outer side of the lower part of the exhaust pipe 4. The flue gas generated by combustion in the boiler body 1 can be introduced into the water in the primary filter box 3. The sticky impurities in the biomass flue gas, such as tar-like substances, alkali metal salt mixtures, and wet dust, are filtered by the water, which effectively avoids the sticky impurities in the biomass flue gas from adhering to the inner wall of the subsequent treatment equipment, thus increasing the difficulty of cleaning.

[0026] As a further implementation of the above technical solution: the end of the gas pipe 2 away from the boiler body 1 is located at the lower left side of the interior of the primary filter box 3. The defoaming plate 15 has a through hole from top to bottom in the middle of the left side, and the diameter of the through hole exceeds the outer diameter of the gas pipe 2 by 2cm. This allows the gas pipe 2 to move up and down normally without affecting the normal up and down movement of the defoaming plate 15 when the bidirectional threaded rod 13 and the moving block 14 drive the defoaming plate 15. At the same time, it avoids large foam from appearing in the gap between the gas pipe 2 and the defoaming plate 15.

[0027] As a further implementation of the above technical solution: an exhaust hole is provided in the middle of the right side of the defoaming plate 15, and the diameter of the exhaust hole matches the inner diameter of the bottom end of the exhaust pipe 4 inside the primary filter box 3. The exhaust pipe 4 and the defoaming plate 15 are connected and fixed by a corrugated pipe. The corrugated pipe allows the bottom of the exhaust pipe 4 to deform as the defoaming plate 15 moves, so that the exhaust hole on the right side of the defoaming plate 15 is always connected to the exhaust pipe 4.

[0028] As a further implementation of the above technical solution: a groove is provided from front to back in the middle of the lower part of the hollow shell 8 and the middle of the upper part of the primary filter box 3. The width of the groove matches the cross-sectional diameter of the connecting rod 19. There are several defoaming needles 16 at the bottom of the defoaming plate 15. The length of each defoaming needle 16 is 3cm. The defoaming plate 15 and the defoaming needles 16 inside the primary filter box 3 can be moved up and down by the movement of the moving block 14 on the outside of the bidirectional threaded rod 13 and the connecting rod 19. The operator can observe the water level in the primary filter box 3 through the first observation window 7 and keep the bottom of the defoaming needles 16 flush with the water surface. This can effectively prevent large foams from appearing on the water surface when sticky impurities in biomass flue gas are discharged into the primary filter box 3 by the gas pipe 2.

[0029] As a further implementation of the above technical solution: the inside of the exhaust pipe 4 near the boiler body 1 is welded with an anti-backflow bucket 20. The inside of the exhaust pipe 4 near the boiler body 1 is penetrated by a sealing plug 18 and spiraled. The water pump 10 is fixed to the rear left side of the top of the primary filter box 3 by bolts. The input end of the water pump 10 is connected to the water suction pipe 11 through a flange. The end of the water suction pipe 11 away from the water pump 10 is fixedly connected to the lower rear side of the inside of the primary filter box 3. The output end of the water pump 10 is connected to the water supply pipe 12 through a flange. The end of the water supply pipe 12 away from the water pump 10 is fixedly connected to the upper inside of the gas supply pipe 2. A second observation window 17 is opened on the front side of the end of the gas supply pipe 2 near the boiler body 1. Water can be flushed in the area with corners in the center of the gas supply pipe 2 to wash away the sticky impurities in the biomass flue gas that are easy to adhere to the inner wall of the gas supply pipe 2, so as to avoid the situation that the center of the gas supply pipe 2 is not easy to be cleaned when the operator maintains the gas supply pipe 2.

[0030] As a further implementation of the above technical solution: there are two sets of anti-backflow buckets 20, and the anti-backflow buckets 20 are arranged facing each other on the inner wall of the gas transmission pipe 2 in a way that is wider on the outside and narrower on the inside. The sealing plug 18 is located below the two sets of anti-backflow buckets 20. The end of the water transmission pipe 12 inside the gas transmission pipe 2 is located on the right side of the anti-backflow bucket 20. This can prevent water from flowing into the boiler body 1 through the gas transmission pipe 2 when the water flow impacts the inner wall of the gas transmission pipe 2. When cleaning the gas transmission pipe 2, the sealing plug 18 below the end of the gas transmission pipe 2 near the boiler body 1 can be opened to discharge the water remaining between the two sets of anti-backflow buckets 20 downwards, avoiding the situation where water enters between the two sets of anti-backflow buckets 20 and is difficult to discharge.

[0031] Working principle:

[0032] When using this invention, water is injected into the primary filter box 3 through the input pipe 5. The operator observes the water level in the primary filter box 3 through the first observation window 7 in the middle of the front face of the primary filter box 3. After reaching the set position, water injection into the input pipe 5 is stopped, and the motor 9 at the top of the primary filter box 3 is started. The motor 9 drives the bidirectional threaded rod 13 at the output end to rotate inside the hollow shell 8. The moving block 14 on the outer side of the bidirectional threaded rod 13 moves towards the center, driving the connecting rod 19 at its bottom and the defoaming plate 15 at the bottom of the connecting rod 19 to move downwards in the primary filter box 3. The motor 9 is turned off when the operator observes through the first observation window 7 that the defoaming needle 16 at the bottom of the defoaming plate 15 contacts the water surface. As the defoaming plate 15 moves downwards, the corrugated pipe at the bottom of the exhaust pipe 4 connected to the defoaming plate 15 deforms. Then, the boiler body 1 can be used. The flue gas generated by combustion enters the water in the primary filter box 3 through the gas supply pipe 2. The large bubbles generated in the water are all punctured by the defoaming needle 16, preventing them from forming large bubbles, and thus the water is initially filtered. The flue gas is discharged through exhaust pipe 4 to the next flue gas treatment device, while the sticky impurities in the flue gas are filtered by water. After filtration, the water in the primary filter box 3 is discharged out through output pipe 6, and water is refilled into the primary filter box 3 for the next round of filtration. When it is necessary to clean the inner wall of the gas supply pipe 2, the sealing plug 18 on the lower left side of the exhaust pipe 4 is opened, and the water pump 10 at the rear left side of the top of the primary filter box 3 is started. The water pump 10 draws water out of the primary filter box 3 through the water suction pipe 11 and through the water supply pipe. 12 is conveyed into the gas transmission pipe 2. Water washes the inner wall of the gas transmission pipe 2, and the sticky impurities on the inner wall of the gas transmission pipe 2 are carried back into the primary filter box 3. Two sets of opposing anti-backflow buckets 20 are set inside the gas transmission pipe 2 near the filter body. This can prevent water from flowing into the boiler body 1 through the gas transmission pipe 2 when the water flow impacts the inner wall of the gas transmission pipe 2. The water remaining between the two sets of anti-backflow buckets 20 is discharged downward from the open sealing plug 18, avoiding the situation where water enters between the two sets of anti-backflow buckets 20 and is difficult to discharge.

[0033] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flue gas treatment device for a biomass boiler, comprising a boiler body (1), characterized in that: A gas supply pipe (2) is fixedly connected to the right end face of the boiler body (1). A primary filter box (3) is fixedly connected to the outer side of the end of the gas supply pipe (2) away from the boiler body (1). An input pipe (5) is fixedly connected to the top left side of the front end face of the primary filter box (3). An output pipe (6) is fixedly connected to the middle left side of the front end face of the primary filter box (3).

2. The flue gas treatment device for a biomass boiler according to claim 1, characterized in that: The primary filter box (3) has a first observation window (7) in the middle of its front end face. A hollow shell (8) is fixedly connected to the middle of the top of the primary filter box (3). A motor (9) is fixedly connected to the rear end face of the hollow shell (8). A bidirectional threaded rod (13) is fixedly connected to the output end of the motor (9). A moving block (14) is spirally connected to the outer side of the bidirectional threaded rod (13). A connecting rod (19) is rotatably connected to the bottom of the moving block (14). A defoaming plate (15) is rotatably connected to the end of the connecting rod (19) away from the moving block (14). A defoaming needle (16) is fixedly connected to the bottom of the defoaming plate (15). 15) An exhaust pipe (4) is fixedly connected to the middle of the top right side. The middle of the left side of the defoaming plate (15) is slidably connected to the outer side below the gas pipe (2). The end of the bidirectional threaded rod (13) away from the motor (9) is rotatably connected to the middle of the front side inside the hollow shell (8). The surface of the moving block (14) is slidably connected to the inner wall of the hollow shell (8). The middle of the lower part of the hollow shell (8) is slidably connected to the middle of the upper part of the primary filter box (3). The edge of the defoaming plate (15) is slidably connected to the inner wall of the upper part of the primary filter box (3). The middle of the upper right side inside the primary filter box (3) is fixedly connected to the outer side below the exhaust pipe (4).

3. The flue gas treatment device for a biomass boiler according to claim 2, characterized in that: The end of the gas supply pipe (2) away from the boiler body (1) is located on the lower left side inside the primary filter box (3). The defoaming plate (15) has a through hole from top to bottom in the middle of the left side, and the diameter of the through hole exceeds the outer diameter of the gas supply pipe (2) by 2cm.

4. The flue gas treatment device for a biomass boiler according to claim 2, characterized in that: The defoaming plate (15) has an exhaust hole in the middle of the right side, and the diameter of the exhaust hole matches the inner diameter of the bottom end of the exhaust pipe (4) inside the primary filter box (3). The exhaust pipe (4) and the defoaming plate (15) are connected and fixed by a corrugated pipe.

5. The flue gas treatment device for a biomass boiler according to claim 2, characterized in that: The hollow shell (8) has a groove in the middle of the lower part and the primary filter box (3) has a groove in the middle of the upper part. The width of the groove matches the cross-sectional diameter of the connecting rod (19). The defoaming plate (15) has several defoaming needles (16) at the bottom, and the length of each defoaming needle (16) is 3cm.

6. The flue gas treatment device for a biomass boiler according to claim 2, characterized in that: An anti-backflow hopper (20) is provided inside the exhaust pipe (4) at one end near the boiler body (1). A sealing plug (18) is spirally connected to the lower part of the exhaust pipe (4) at one end near the boiler body (1). A water pump (10) is fixedly connected to the rear left side of the top of the primary filter box (3). A water pump (11) is fixedly connected to the input end of the water pump (10). The end of the water pump (11) away from the water pump (10) is fixedly connected to the lower rear side of the interior of the primary filter box (3). A water supply pipe (12) is fixedly connected to the output end of the water pump (10). The end of the water supply pipe (12) away from the water pump (10) is fixedly connected to the upper part of the interior of the gas supply pipe (2). A second observation window (17) is opened on the front side of the end of the gas supply pipe (2) near the boiler body (1).

7. The flue gas treatment device for a biomass boiler according to claim 6, characterized in that: There are two sets of anti-backflow buckets (20), and the anti-backflow buckets (20) are arranged facing each other on the inner wall of the gas pipe (2) in a way that is wider on the outside and narrower on the inside. The sealing plug (18) is located below the two sets of anti-backflow buckets (20), and the end of the water pipe (12) inside the gas pipe (2) is located on the right side of the anti-backflow bucket (20).

Images