Biomass boiler furnace ash filtering device

Abstract

The utility model discloses a biomass boiler hearth ash filtering device, which relates to the field of biomass boilers, and comprises a box body, a heat conducting plate is arranged in the box body, the heat conducting plate divides the interior of the box body into a heat storage cavity and a flue, two ends of the flue are provided with flue gas ports, and the flue gas ports are communicated with the heat storage cavity. A first ash filtering assembly, a second ash filtering assembly and a third ash filtering assembly are arranged at the front end, the middle end and the rear end of the flue correspondingly. The n-shaped heat conduction plate is arranged in the box body, the box body is divided into the heat storage cavity and the flue, and the first ash filtering assembly, the second ash filtering assembly and the third ash filtering assembly in the flue filter particles in flue gas in a layered mode. The filtered particles are respectively deposited in the first ash filtering assembly, the second ash filtering assembly and the third ash filtering assembly, so that the situation that a large amount of flue gas particles are deposited in an independent ash filtering device, and the flue gas is not smoothly filtered is avoided.

Description

Technical Field

[0001] The utility model relates to the field of biomass boilers, in particular to a biomass boiler furnace ash filtering device. Background Art

[0002] Since the ash melting point of biomass fuel is low, when the high-temperature flue gas after combustion in the furnace meets the low-temperature heating surface, especially the heat exchange tube bundle, it is easy to produce ash accumulation, slagging, fouling and corrosion. The ash accumulation adheres to the wall of the heating surface tube, forming an ash fouling layer, or even coking, which causes the heat exchange tube bundle to lose its heat exchange function, greatly reducing the heat exchange efficiency of the boiler, and in severe cases, causing the flue to be blocked, making the boiler unable to operate normally.

[0003] The utility model patent with publication number CN 207112842 U discloses a biomass atmospheric pressure boiler flue gas ash filter, the ash filter includes a lower water pipe, an ash filter air pipe bundle, an upper water pipe, an upper connecting elbow and a lower connecting elbow, the upper water pipe is radially connected to the upper end of the ash filter air pipe bundle, the lower water pipe is radially connected to the lower end of the ash filter air pipe bundle, and the pipelines of the ash filter air pipe bundle, the upper water pipe and the lower water pipe are connected; one end of the upper water pipe and the lower water pipe are both sealed, the other end of the upper water pipe is detachably connected to the first water pipe connecting pipe of the boiler through the upper connecting elbow, and the other end of the lower water pipe is detachably connected to the second water pipe connecting pipe of the boiler through the lower connecting elbow.

[0004] When the high-temperature flue gas and water in the boiler pass through the above utility model, the soot carried in the flue gas is adsorbed by the ash filter bundle, thereby cleaning the flue gas. The clean flue gas enters the heat exchange bundle of the boiler, avoiding the accumulation of dust, contamination, and coking on the heat exchange bundle. However, the above utility model has a single ash removal method, and the amount of ash accumulation is large, which is not easy to discharge and requires frequent disassembly. Therefore, it is necessary to invent a biomass boiler furnace ash filter device to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a biomass boiler furnace ash filtering device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a biomass boiler furnace ash filter device, comprising a box body, a heat conduction plate is arranged inside the box body, the heat conduction plate divides the interior of the box body into a heat storage chamber and a flue, both ends of the flue are provided with flue gas outlets, and the front, middle and rear ends of the flue are respectively provided with a first ash filter assembly, a second ash filter assembly and a third ash filter assembly.

[0007] Preferably, both the first ash filtering assembly and the third ash filtering assembly include a first cover plate which is arranged outside the openings formed at both ends of the top of the box body. On both sides of the lower surface of the first cover plate, two symmetrically distributed connecting sleeves are fixed. A connecting rod is inserted into the inner part of the connecting sleeve, and a frame is fixed at the bottom end of the connecting rod.

[0008] Preferably, vibration motors are fixed at both ends of the upper surface of the first cover plate. The output shaft of the vibration motor is connected to the upper surface of the frame, and a plurality of sealing strips which are vertically distributed at equal intervals are adhesively bonded to the outer side of the frame.

[0009] Preferably, the frame on the first ash filtering assembly is a first mounting frame, and the frame on the third ash filtering assembly is a second mounting frame.

[0010] Preferably, the third ash filtering assembly includes a second cover plate which is arranged outside the opening formed in the middle of the top end of the box body. A sealing plate is fixed to the lower surface of the second cover plate, a first filter plate is fixed to the lower surface of the sealing plate, and a collection box is fixed to one side of the first filter plate.

[0011] Preferably, an inclined plate is fixed to the lower end of the inner cavity of the first mounting frame. A smoke guiding plate is arranged above the opening of the inclined plate. A second filter plate is installed at the upper end opening of the first mounting frame, and a plurality of third filter plates which are vertically distributed at equal intervals are fixed to the inner wall of the second mounting frame.

[0012] The technical effects and advantages of the present utility model:

[0013] In the present utility model, a U-shaped heat conducting plate is arranged inside the box body, dividing the box body into a heat storage cavity and a flue. The first ash filtering assembly, the second ash filtering assembly and the third ash filtering assembly in the flue filter the particles in the flue gas in layers. The filtered particles are respectively deposited in the first ash filtering assembly, the second ash filtering assembly and the third ash filtering assembly, avoiding the situation that a large amount of flue gas particles are deposited in a single ash filtering device, resulting in poor flue gas filtration. At the same time, the first ash filtering assembly, the second ash filtering assembly and the third ash filtering assembly are all arranged as detachable structures, facilitating the cleaning of the deposited flue gas particles inside them. When the flue gas flows in the flue, the heat inside it heats the water in the heat storage cavity through the heat conducting plate, achieving the energy-saving effect of recovering and utilizing the waste heat of the flue gas. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0015] Figure 2 It is a schematic cross-sectional view of the overall structure of the present utility model.

[0016] Figure 3Schematic structural diagram of the first ash filtering component and the third ash filtering component of the present utility model.

[0017] Figure 4 Schematic structural diagram of the sealing strip of the present utility model.

[0018] Figure 5 Schematic cross-sectional view of the first installation frame structure of the present utility model.

[0019] Figure 6 Schematic cross-sectional view of the second installation frame structure of the present utility model.

[0020] In the figure: 1, box body; 2, heat conduction plate; 3, heat storage cavity; 4, flue; 6, flue gas port; 7, first ash filtering component; 8, second ash filtering component; 9, third ash filtering component; 10, first cover plate; 11, connecting sleeve; 12, connecting rod; 13, frame; 131, first installation frame; 132, second installation frame; 14, vibration motor; 15, sealing strip; 16, second cover plate; 17, sealing plate; 18, first filter plate; 19, collection box; 20, inclined plate; 21, smoke guiding plate; 22, second filter plate; 23, third filter plate. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] The present utility model provides a biomass boiler furnace ash filtering device as shown in Figure 1-6 which includes a box body 1. A heat conduction plate 2 is arranged inside the box body 1. The heat conduction plate 2 is arranged in a U-shaped structure and plays a role in heat conduction. The heat conduction plate 2 divides the inside of the box body 1 into a heat storage cavity 3 and a flue 4. Both ends of the flue 4 are provided with flue gas ports 6. The two flue gas ports 6 are respectively for inlet flue gas and outlet flue gas. The front, middle and rear ends of the flue 4 are respectively provided with a first ash filtering component 7, a second ash filtering component 8 and a third ash filtering component 9. The three groups of ash filtering components play a role in filtering flue gas particles in layers.

[0023] Specifically, the first ash filter assembly 7 and the third ash filter assembly 9 both include a first cover plate 10, which is fixed to the box body 1 by a plurality of bolts, and the first cover plate 10 is arranged on the outside of the openings opened at both ends of the top of the box body 1, and two symmetrically distributed connecting sleeves 11 are fixed on both sides of the lower surface of the first cover plate 10, and a connecting rod 12 is inserted into the inside of the connecting sleeve 11, and the top two sides of the connecting rod 12 are connected to the sliding groove in the connecting sleeve 11 through sliders, which limit the connecting rod 12 and prevent the connecting rod 12 from separating from the connecting sleeve 11, and a frame 13 is fixed to the bottom end of the connecting rod 12, and vibration motors 14 are fixed at both ends of the upper surface of the first cover plate 10, and the output shaft of the vibration motor 14 is connected to the upper surface of the frame 13, and the two vibration motors 14 are synchronous motors, which drive the frame 13 to vibrate slightly up and down, and a plurality of sealing strips 15 vertically distributed at equal intervals are bonded to the outside of the frame 13, and the sealing strips 15 play a sealing role.

[0024] The frame 13 on the first ash filter assembly 7 is a first mounting frame 131, and the frame 13 on the third ash filter assembly 9 is a second mounting frame 132. An inclined plate 20 is fixed to the lower end of the inner cavity of the first mounting frame 131. The lower surface of the inclined plate 20 plays a role in guiding smoke. The upper surface of the inclined plate 20 cooperates with the first mounting frame 131 to collect smoke particles. A smoke guide plate 21 is arranged above the opening of the inclined plate 20. The smoke guide plate 21 plays a role in guiding smoke and guiding smoke particles, so that the smoke particles can be collected by the mobile phone. In the installation frame 131, a second filter plate 22 is installed at the upper opening of the first installation frame 131. The second filter plate 22 plays a role in filtering smoke particles. At the same time, the filter holes of the second filter plate 22 are larger than the filter holes of the first filter plate 18. A plurality of third filter plates 23 are fixed on the inner wall of the second installation frame 132 at equal intervals and vertically distributed. The third filter plate 23 plays a role in filtering smoke particles. At the same time, the filter holes of the third filter plate 23 are smaller than the filter holes of the first filter plate 18, and the filter holes of the plurality of third filter plates 23 decrease successively from top to bottom.

[0025] More specifically, the third ash filter assembly 9 includes a second cover plate 16, which is arranged on the outside of an opening opened in the middle of the top of the box body 1, and a sealing plate 17 is fixed to the lower surface of the second cover plate 16, and the sealing plate 17 plays a sealing role. A first filter plate 18 is fixed to the lower surface of the sealing plate 17, and the first filter plate 18 plays a role in filtering flue gas particles. A collecting frame 19 is fixed to one side of the first filter plate 18, and the collecting frame 19 is arranged to be an L-shaped structure, and the collecting frame 19 cooperates with the inner wall of the box body 1 to form a collecting box, which plays a role in collecting flue gas particles. The first filter plate 18 is arranged to be an inwardly inclined structure to facilitate the flue gas particles to fall into the collecting frame 19.

[0026] Working principle of this utility model:

[0027] When the device is working, the smoke enters the flue 4 through the smoke port 6 on one side of the box body 1, and then the smoke enters the first installation frame 131 along the inclined plate 20, and is filtered by the second filter plate 22. The filtered smoke particles fall into the collection box formed by the first installation frame 131 and the inclined plate 20. The smoke that has been initially filtered contacts the first filter plate 18 along the flue 4, and the smoke particles filtered by the first filter plate 18 fall into the collection frame 19. The smoke that has passed the first filter plate 18 contacts the third filter plate 23 along the flue 4. The plurality of third filter plates 23 can fully filter the particles in the smoke, and the remaining smoke passes through another side of the box body 1. The smoke is discharged from the smoke outlet 6 on the side, and the vibration motor 14 drives the first mounting frame 131 and the second mounting frame 132 to vibrate up and down, so as to shake off the smoke particles attached to the second filter plate 22 and the third filter plate 23 to prevent the smoke particles from clogging the filter plates. When the smoke passes through the flue 4, the heat transfer plate 2 stores the residual heat in the smoke in the heat storage chamber 3, and the heat energy in the heat storage chamber 3 is transferred through the external medium, so as to achieve the effect of energy saving. After working for a period of time, the limit of the first cover plate 10 and the second cover plate 16 is released by removing the bolts, and then the first cover plate 10 and the second cover plate 16 are picked up, and then the frame 13 and the collection frame 19 are taken out, and the smoke particles therein are cleaned up.

[0028] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A biomass boiler furnace ash filtering device, comprising a box (1), characterized in that: A heat conduction plate (2) is arranged inside the box body (1), and the heat conduction plate (2) divides the inside of the box body (1) into a heat storage chamber (3) and a flue (4). Both ends of the flue (4) are provided with flue gas outlets (6), and the front, middle and rear ends of the flue (4) are respectively provided with a first ash filter assembly (7), a second ash filter assembly (8) and a third ash filter assembly (9).

2. The biomass boiler furnace ash filtering device according to claim 1 is characterized in that: The first ash filter assembly (7) and the third ash filter assembly (9) both comprise a first cover plate (10), the first cover plate (10) being arranged outside openings opened at both ends of the top of the box body (1), two symmetrically distributed connecting sleeves (11) being fixed on both sides of the lower surface of the first cover plate (10), a connecting rod (12) being inserted into the interior of the connecting sleeve (11), and a frame (13) being fixed to the bottom end of the connecting rod (12).

3. The biomass boiler furnace ash filtering device according to claim 2 is characterized in that: Vibration motors (14) are fixed to both ends of the upper surface of the first cover plate (10), the output shaft of the vibration motor (14) is connected to the upper surface of the frame (13), and a plurality of sealing strips (15) vertically distributed at equal intervals are bonded to the outer side of the frame (13).

4. The biomass boiler furnace ash filtering device according to claim 3 is characterized in that: The frame (13) on the first ash filter assembly (7) is a first installation frame (131), and the frame (13) on the third ash filter assembly (9) is a second installation frame (132).

5. The biomass boiler furnace ash filtering device according to claim 4 is characterized in that: The third ash filter assembly (9) comprises a second cover plate (16), the second cover plate (16) being arranged outside an opening opened in the middle of the top end of the box body (1), a sealing plate (17) being fixed to the lower surface of the second cover plate (16), a first filter plate (18) being fixed to the lower surface of the sealing plate (17), and a collecting frame (19) being fixed to one side of the first filter plate (18).

6. The biomass boiler furnace ash filtering device according to claim 5, characterized in that: An inclined plate (20) is fixed at the lower end of the inner cavity of the first mounting frame (131), a smoke guide plate (21) is arranged above the opening of the inclined plate (20), a second filter plate (22) is installed at the upper opening of the first mounting frame (131), and a plurality of third filter plates (23) are fixed on the inner wall of the second mounting frame (132) and are vertically distributed at equal intervals.

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