Biomass boiler device with multi-pipe dust removal mechanism and biomass power generation device

Abstract

The utility model relates to a biomass boiler device with a multi-pipe dust removal mechanism and a biomass power generation device. The multi-pipe dust removal mechanism comprises a first drainage pipeline, a horizontal flue assembly, a cyclone separator assembly and a second drainage pipeline, the horizontal flue assembly sequentially comprises a flue gas outlet space, a flue gas inlet space and an ash outlet space from top to bottom, and the first drainage pipeline communicates with the flue gas inlet space of the transition flue assembly and the flue gas inlet space of the horizontal flue assembly; a smoke inlet of the cyclone separator assembly is located in the smoke inlet space, a smoke outlet of the cyclone separator assembly is located in the smoke outlet space, an ash outlet of the cyclone separator assembly is located in the ash outlet space, and the second drainage pipeline is communicated with the smoke outlet space; and an economizer mechanism. According to the technical scheme, the problems of low heat exchange efficiency, high pressure difference and the like caused by the fact that a dust removal mechanism of a biomass boiler device is complex in internal structure and inconvenient to maintain and dust is easily accumulated on a tail heating surface are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biomass boiler ash equipment, in particular to a biomass boiler device with a multi-tube dust removal mechanism and a biomass power generation device. BACKGROUND

[0002] Biomass boilers, as a renewable energy utilization device, have been widely used in recent years. It generates heat energy by burning biomass fuel (such as crop straw, wood chips, forestry waste, etc.), which is used for heating, industrial production, etc. Biomass boilers have the advantages of environmental protection, renewable, low cost, etc., which meet the requirements of sustainable development. However, a large amount of ash and dust will be produced during the combustion of biomass fuel, which will deposit in the flue of the boiler.

[0003] The problem of flue ash deposition of biomass boiler seriously affects the operating efficiency and service life of the boiler. The thermal efficiency is reduced: the deposition of ash will reduce the heat transfer efficiency of the flue, which will lead to the insufficient transfer of heat, increase the fuel consumption, and reduce the overall thermal efficiency of the boiler. The pressure drop increases: the deposition of ash will reduce the flow area of the flue, increase the resistance of the flue gas flow, and increase the energy consumption of the fan, which may even affect the normal operation of the boiler. Safety hazards: too much ash deposition may cause local overheating, even cause secondary combustion, and exist safety hazards.

[0004] At present, the flue ash removal technology of biomass boiler mainly includes manual cleaning, mechanical vibration, steam blowing, acoustic blowing, etc. However, these methods have certain limitations. Manual cleaning: low efficiency, high labor intensity, and difficult to completely clean the ash, and there is a safety risk. Mechanical vibration: although it can remove part of the ash, but it is not good for the ash with strong adhesion, and the equipment is complex, the maintenance cost is high. Steam blowing: although the effect is good, but it needs to consume a lot of steam, the operation cost is high, and the sealing requirement of the equipment is high. Acoustic blowing: the cleaning effect of fine particles is limited, and the equipment cost is high, the maintenance is complex.

[0005] There are also some technologies that use dust removal equipment, such as the invention with the application number 201310386271.0 and the invention name of a multi-tube dust removal device inside the boiler. However, its internal structure is complex, inconvenient to repair and maintain, and the dust removal efficiency is not high. CONTENT OF THE UTILITY MODEL

[0006] The present application provides a biomass boiler device with a multi-tube dust removal mechanism and a biomass power generation device to solve the problems of complex internal structure of the dust removal mechanism of the biomass boiler device in the prior art, inconvenient repair and maintenance, and easy ash deposition on the tail heating surface, which leads to low heat exchange efficiency and high pressure difference.

[0007] According to the biomass boiler device with the multi-pipe dust removal mechanism provided in the application, the biomass boiler mechanism comprises a biomass boiler body and a transition flue assembly, the first end of the transition flue assembly is connected with the smoke outlet of the biomass boiler body, and the transition flue assembly is vertically arranged; the multi-pipe dust removal mechanism comprises a first flow guide pipe, a horizontal flue assembly, a cyclone separator assembly and a second flow guide pipe, the horizontal flue assembly comprises, from top to bottom, a smoke outlet space, a smoke inlet space and an ash outlet space, the first end of the first flow guide pipe is connected with the second end of the transition flue assembly, the second end of the first flow guide pipe is connected with the smoke inlet space of the horizontal flue assembly, the smoke inlet port of the cyclone separator assembly is located in the smoke inlet space, the smoke outlet port of the cyclone separator assembly is located in the smoke outlet space, the ash outlet port of the cyclone separator assembly is located in the ash outlet space, and the first end of the second flow guide pipe is connected with the smoke outlet space; the economizer mechanism comprises an economizer flue and a plurality of heat exchangers, the plurality of heat exchangers are arranged in the economizer flue at intervals, and the economizer flue is connected with the second flow guide pipe; the ash outlet mechanism is connected with the upper end of the ash outlet space and the lower end of the slag conveying mechanism.

[0008] Further, the horizontal flue assembly comprises a horizontal flue structure, a first separation fixing structure and a second separation fixing structure, the first separation fixing structure and the second separation fixing structure are horizontally arranged in the horizontal flue structure, the first separation fixing structure is located at the upper part of the second separation fixing structure, the first separation fixing structure and the upper part of the horizontal flue structure form the smoke outlet space, the first separation fixing structure and the second separation fixing structure form the smoke inlet space, and the second separation fixing structure and the lower part of the horizontal flue structure form the ash outlet space.

[0009] Further, the cyclone separator assembly comprises a separation cylinder and an air outlet cylinder, the upper port of the separation cylinder is located in the smoke inlet space, the lower port of the separation cylinder is located in the ash outlet space, the upper port of the air outlet cylinder is located in the smoke outlet space, and the lower port of the air outlet cylinder is located in the separation cylinder.

[0010] Further, the smoke inlet port of the separation cylinder is located at the side of the separation cylinder, and the inner wall of the separation cylinder is provided with spiral flow guide vanes.

[0011] Further, the ratio of the height H of the smoke inlet port of the separation cylinder to the width h of the smoke inlet port of the separation cylinder to the diameter D of the separation cylinder is (20-30):(13-20):(70-90).

[0012] Further, the separation cylinder is provided with a flow guide surface, and the flow guide surface is located at the opposite side of the smoke inlet port of the separation cylinder.

[0013] Further, the ratio of the diameter of the separation cylinder to the diameter of the air outlet cylinder is between 1.5 and 3.

[0014] Furthermore, the ash discharge mechanism includes an ash discharge connecting shell and an ash discharge pipe. The upper port of the ash discharge pipe is connected to the lower port of the ash discharge connecting shell. The cross-sectional area of ​​the ash discharge connecting shell gradually decreases from top to bottom, and the angle between the connecting shell and the horizontal direction is greater than or equal to 70°.

[0015] Furthermore, the economizer mechanism also includes a steam soot blowing assembly, the outlet of which is correspondingly set with multiple heat exchangers.

[0016] According to another aspect of this application, a biomass power generation device is also provided, which includes a biomass boiler unit, a steam turbine and a generator, with a steam soot blowing assembly connected to the main steam pipeline, and the biomass boiler unit is the aforementioned biomass boiler unit.

[0017] Applying the technical solution of this application, the biomass boiler body generates soot and other substances during operation. These substances are effectively separated using a cyclone separator assembly based on centrifugal force and other principles. This application divides the horizontal flue assembly into inlet, outlet, and ash removal spaces from top to bottom, ensuring that the inlet, outlet, and ash removal spaces do not interfere with each other. For example, flue gas without dust removal will contain a lot of soot. If a large area of ​​the outlet flue comes into contact with this flue gas, a significant amount of soot will accumulate over time, creating a safety hazard. Flue gas that has passed through a multi-tube dust removal mechanism is cleaner and then enters the economizer mechanism, greatly improving heat exchange efficiency. The technical solution of this application effectively solves the problems of complex internal structure of the dust removal mechanism in existing biomass boiler devices, inconvenient inspection and maintenance, and easy ash accumulation on the tail heating surface, leading to low heat exchange efficiency and high pressure differential. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the overall structure of a biomass boiler device with a multi-tube dust removal mechanism according to an embodiment of this application is shown.

[0021] Figure 2 It shows Figure 1 Enlarged schematic diagram of point A of the biomass boiler unit;

[0022] Figure 3 Fig. 1 shows a schematic diagram of a biomass boiler device according to an embodiment of the present application; Figure 1 Fig. 2 shows a schematic diagram of an internal view of a cyclone separator assembly of the biomass boiler device of Fig. 1;

[0023] Figure 4 Fig. 3 shows a schematic diagram of a partial structure of the cyclone separator assembly of Fig. 2; Figure 3 Fig. 4 shows a schematic diagram of a partial structure of the cyclone separator assembly of Fig. 2;

[0024] Figure 5 Fig. 5 shows a schematic diagram of a nozzle structure of the biomass boiler device of Fig. 1. Figure 1

[0025] Wherein, the above figures include the following reference signs:

[0026] 10, biomass boiler mechanism; 11, biomass boiler body; 12, transition flue assembly; 20, multi-tube dust removal mechanism; 21, first flow guide pipe; 22, horizontal flue assembly; 221, flue gas outlet space; 222, flue gas inlet space; 223, ash outlet space; 224, horizontal flue structure; 225, first partition fixing structure; 226, second partition fixing structure; 23, cyclone separator assembly; 231, separation cylinder; 232, gas outlet cylinder; 233, flow guide surface; 24, second flow guide pipe; 30, coal economizer mechanism; 31, coal economizer flue; 32, heat exchanger; 33, steam soot blowing assembly; 40, ash removal mechanism; 41, ash removal connecting shell; 42, ash removal pipe; 50, slag conveying mechanism. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0029] ​For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0030] like Figures 1 to 3 As shown, this embodiment of a biomass boiler device with a multi-tube dust removal mechanism includes: a biomass boiler mechanism 10, a multi-tube dust removal mechanism 20, an economizer mechanism 30, and an ash removal mechanism 40. The biomass boiler mechanism 10 includes a biomass boiler body 11 and a transition flue assembly 12. The first end of the transition flue assembly 12 is connected to the flue outlet of the biomass boiler body 11, and the transition flue assembly 12 is vertically arranged. The multi-tube dust removal mechanism 20 includes a first diversion pipe 21, a horizontal flue assembly 22, a cyclone separator assembly 23, and a second diversion pipe 24. The horizontal flue assembly 22 includes, from top to bottom, an exhaust gas space 221, an inlet gas space 222, and an ash outlet space 223. The first end of the first diversion pipe 21 is connected to the second end of the transition flue assembly 12, and the second end of the first diversion pipe 21 is connected to the inlet gas space 222 of the horizontal flue assembly 22. The inlet gas port of the cyclone separator assembly 23 is located in the inlet gas space 222, the outlet gas port of the cyclone separator assembly 23 is located in the exhaust gas space 221, and the ash outlet of the cyclone separator assembly 23 is located in the ash outlet space 223. The first end of the second diversion pipe 24 is connected to the exhaust gas space 221. The economizer mechanism 30 includes an economizer flue 31 and multiple sets of heat exchangers 32, which are spaced apart within the economizer flue 31. The economizer flue 31 is connected to the second diversion pipe 24. The upper end of the ash discharge mechanism 40 is connected to the ash discharge space 223, and the lower end of the ash discharge mechanism 40 is connected to the slag conveying mechanism 50.

[0031] The biomass boiler body 11 will generate ash and other substances during use, which are separated by the cyclone separator assembly 23 through centrifugal force. The embodiment separates the horizontal flue assembly from top to bottom into the smoke inlet space 222, the smoke outlet space 221 and the ash outlet space 223, so that the smoke inlet, smoke outlet and ash outlet do not interfere with each other. For example, the smoke without dust removal will have more ash, and if the large-area smoke outlet channel contacts the smoke, it will accumulate more ash over time, causing safety hazards. The smoke after the multi-tube dust removal mechanism 20 is relatively clean, and then enters the economizer mechanism 30, which greatly improves the heat exchange efficiency. The technical scheme of the embodiment effectively solves the problems of complex internal structure of the dust removal mechanism of the biomass boiler device in the prior art, inconvenient maintenance, and easy ash accumulation of the tail heating surface, resulting in low heat exchange efficiency and high pressure difference.

[0032] It should be noted that the first drainage pipe 21 is in an arc shape, and the second drainage pipe 24 is also in an arc shape. The above structure can reduce resistance and make the smoke flow more smoothly. In the smoke flow direction, the cross-sectional area of the first drainage pipe 21 gradually decreases.

[0033] As shown in Figure 1 and Figure 2 In the technical scheme of the embodiment, the horizontal flue assembly 22 includes a horizontal flue structure 224, a first partition fixed structure 225 and a second partition fixed structure 226. The first partition fixed structure 225 and the second partition fixed structure 226 are horizontally arranged in the horizontal flue structure 224. The first partition fixed structure 225 is located at the upper part of the second partition fixed structure 226. The first partition fixed structure 225 and the upper part of the horizontal flue structure 224 form the smoke outlet space 221. The first partition fixed structure 225 and the second partition fixed structure 226 form the smoke inlet space 222. The second partition fixed structure 226 and the lower part of the horizontal flue structure 224 form the ash outlet space 223. The above structure has low processing cost and is easy to operate. It should be noted that the first partition fixed structure 225 and the second partition fixed structure 226 are both horizontal plate structures, i.e., the first partition fixed structure 225 and the second partition fixed structure 226 are parallel. The horizontal flue structure 224 is a cylindrical structure with only a smoke inlet, a smoke outlet and an ash outlet, and the remaining positions are sealed structures.

[0034] As shown in Figures 1 to 3As shown, in this embodiment, the cyclone separator assembly 23 includes a separation cylinder 231 and an outlet cylinder 232. The upper port of the separation cylinder 231 is located within the flue gas inlet space 222, and the lower port is located within the ash outlet space 223. The upper port of the outlet cylinder 232 is located within the flue gas outlet space 221, and the lower port is located within the separation cylinder 231. Flue gas first spirals into the separation cylinder 231. Under centrifugal force, solid particles and gas separate; the solid particles descend, and the gas enters the outlet cylinder 232 within the separation cylinder 231, thus achieving flue gas separation. It should be noted that the first separating and fixing structure 225 seals and fixes the outlet cylinder, and the second separating and fixing structure 226 seals and fixes the separation cylinder. Thus, the first separating and fixing structure 225 and the second separating and fixing structure 226 not only separate the spaces but also fix the separation cylinder 231 and the outlet cylinder 232. There are multiple cyclone separator components 23, hence the name multi-tube dust removal mechanism. The first partition fixing structure 225 and the second partition fixing structure 226 are made of concrete.

[0035] like Figure 3 As shown, in this embodiment, the flue gas inlet of the separation cylinder 231 is located on the side of the separation cylinder 231, and the inner wall of the separation cylinder 231 has spiral guide vanes. This structure enables the flue gas to move in a spiral motion. It should be noted that the inlet of the separation cylinder 231 is also spiral-shaped, ensuring that the flue gas begins spiral motion as soon as it enters the separation cylinder 231. The spiral guide vanes further ensure the spiral effect of the flue gas. It should be noted that the height of the spiral guide vanes only needs to be set to 1 / 3 of the length of the separation cylinder 231; it is not necessary for the spiral guide vanes to fill the entire separation cylinder 231. The separation cylinder 231 includes an upper straight section and a lower frustum-shaped section. Experiments have shown that the flue gas separation efficiency of this embodiment can reach over 85%.

[0036] like Figure 3 and Figure 4 As shown, in this embodiment, the ratio of the height H of the flue gas inlet of the separation cylinder 231 to the width h of the flue gas inlet of the separation cylinder 231 to the diameter D of the separation cylinder 231 is (20-30):(13-20):(70-90). This structure ensures both compactness and high efficiency in flue gas dust removal. This embodiment uses a ratio of H:h:D of 27:14:80. It should be noted that the cyclone separator assembly 23 in this embodiment has four flue gas inlets, which are evenly distributed around the circumference of the cyclone separator assembly 23.

[0037] like Figure 4As shown, in this embodiment, the separation cylinder 231 has a guide surface 233, which is located on the opposite side of the smoke inlet of the separation cylinder 231. The guide surface 233 serves to guide the smoke, and its arrangement greatly reduces the resistance of the smoke entering the separation cylinder 231. It should be noted that the separation cylinder 231 is made of ceramic material. Through the above-mentioned structure and material arrangement, soot does not easily accumulate in the smoke inlet space 222. For example, the material has low friction, and the 78° inclination angle facilitates the slippage of soot. Furthermore, the flow of smoke within the smoke inlet space 222 allows the smoke to reach a certain equilibrium, which is also one of the factors contributing to the low ash accumulation.

[0038] like Figure 3 As shown, in this embodiment, the ratio of the diameter D of the separation cylinder 231 to the diameter d of the outlet cylinder 232 is between 1.5 and 3. This structure is compact and has high gas separation efficiency. In this embodiment, a ratio of 2.1 is used.

[0039] like Figure 1 As shown, in this embodiment, the ash discharge mechanism 40 includes an ash discharge connecting housing 41 and an ash discharge pipe 42. The upper port of the ash discharge pipe 42 is connected to the lower port of the ash discharge connecting housing 41. The cross-sectional area of ​​the ash discharge connecting housing 41 gradually decreases from top to bottom, and the angle between the connecting housing and the horizontal direction is greater than or equal to 70°. This structure allows the ash to fall under the influence of gravity, making it less likely to accumulate inside the ash discharge mechanism 40.

[0040] like Figure 1 and Figure 5 As shown, in this embodiment, the economizer mechanism 30 further includes a steam soot blowing assembly 33, the outlet of which is correspondingly arranged with multiple heat exchangers 32. The steam soot blowing assembly 33 includes a main pipe, multiple branch pipes, and multiple solenoid valves, with each branch pipe connected to the main pipe. One branch pipe corresponds to one heat exchanger 32, and one branch pipe corresponds to one solenoid valve. The end of each branch pipe is a nozzle, and each nozzle has two outlets with opposite directions (one clockwise and one counterclockwise). This improves the removal of floating ash from the heat exchangers 32, resulting in more thorough ash removal. Steam ash removal can remove some scale buildup on the heat exchangers, but it requires control of steam flow rate, pressure, and other factors. Each heat exchanger corresponds to six nozzles, which are evenly arranged circumferentially on the economizer flue 31. During ash removal, the steam ash removal time is controlled by the solenoid valves. For example, the solenoid valves activate once every 6 hours for ash removal, and then close after 5 minutes.

[0041] From the above, the embodiment greatly reduces the abrasion and dust deposition of each heating surface from the first stage tail heating surface to the last stage tail heating surface, especially the surface ammonium bisulfate entrained soot of the penultimate stage tail heating surface and the last stage tail heating surface, which causes the hardening and corrosion caused by deposition (the embodiment sets 7 heating surfaces, i.e. 7 heat exchangers).

[0042] The dust removal device (the multi-tube dust removal mechanism 20) is suitable for dust removal of 300-420℃ high dust flue gas, and the size can be designed according to different flue gas amounts. The dust removal device body of the embodiment has a pressure resistance not less than 2kpa, an overall pressure drop not greater than 1200pa, and a body air leakage rate not greater than 1.5%. In order to ensure wear resistance, the contact dust component of the dust removal device is made of ceramic material. In order to prevent the ash hopper from being accumulated and hardened, the angle between the ash hopper lower funnel wall (the ash discharge connecting shell 41) and the horizontal plane is not less than 70°.

[0043] The dust removal device in the application directly discharges the dust removal ash to the bottom slag conveying device of the boiler or uses pneumatic conveying to the ash and slag storage, for continuous ash discharge.

[0044] It should be noted that the biomass boiler device of the application can be used for external power generation, external heat supply, or external power generation and external heat supply.

[0045] According to another aspect of the application, a biomass power generation device is also provided, which comprises a biomass boiler device, a steam turbine and a generator, and a steam blowing and ash removal assembly is connected to the main steam pipeline. The biomass power generation device of the application has a high waste heat utilization efficiency.

[0046] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0047] It should be noted that the terms "first", "second", and the like, herein do not necessarily have an ordinal or chronological significance. These terms are used to distinguish a certain feature from another feature. It should be understood that the use of these terms is not intended to limit the scope of the application to any particular embodiment. In addition, the terms "comprise", "comprising", "include", "including", and the like, are used herein to indicate the presence of stated features, steps or elements, but do not preclude the presence or addition of one or more other features, steps, elements or groups thereof. The terms "comprise", "comprising", "include", "including", and the like, are used herein to indicate the presence of stated features, steps or elements, but do not preclude the presence or addition of one or more other features, steps, elements or groups thereof.

[0048] The preferred embodiments of the application are described above in detail. The application is not limited to the embodiments described above, but can vary and be modified within the spirit and scope of the application. Accordingly, any and all modifications, variations or equivalent arrangements which do not depart from the spirit or scope of the application should be considered to be within the scope of the application. The true scope of the application is set forth in the appended claims.

Claims

1. A biomass boiler apparatus having a multi-tube dust removal mechanism, characterized by comprising: The utility model relates to a biomass boiler mechanism (10) comprising a biomass boiler body (11) and a transition flue assembly (12), the first end of the transition flue assembly (12) is communicated with the smoke outlet of the biomass boiler body (11), and the transition flue assembly (12) is vertically arranged. A multi-tube dust removal mechanism (20) comprising a first flow guide pipe (21), a horizontal flue assembly (22), a cyclone separator assembly (23) and a second flow guide pipe (24), the horizontal flue assembly (22) comprises, from top to bottom, a smoke outlet space (221), a smoke inlet space (222) and an ash outlet space (223), the first end of the first flow guide pipe (21) is communicated with the second end of the transition flue assembly (12), the second end of the first flow guide pipe (21) is communicated with the smoke inlet space (222) of the horizontal flue assembly (22), the smoke inlet of the cyclone separator assembly (23) is located in the smoke inlet space (222), the smoke outlet of the cyclone separator assembly (23) is located in the smoke outlet space (221), the ash outlet of the cyclone separator assembly (23) is located in the ash outlet space (223), and the first end of the second flow guide pipe (24) is communicated with the smoke outlet space (221). A coal economizer mechanism (30) comprising a coal economizer flue (31) and a plurality of heat exchangers (32), the plurality of heat exchangers (32) are arranged in the coal economizer flue (31) at intervals, and the coal economizer flue (31) is communicated with the second flow guide pipe (24). An ash outlet mechanism (40) having an upper end communicated with the ash outlet space (223) and a lower end communicated with a slag conveying mechanism (50). The horizontal flue assembly (22) comprises a horizontal flue structure (224), a first partitioning and fixing structure (225) and a second partitioning and fixing structure (226), the first partitioning and fixing structure (225) and the second partitioning and fixing structure (226) are horizontally arranged in the horizontal flue structure (224), the first partitioning and fixing structure (225) is located in the upper part of the second partitioning and fixing structure (226), the first partitioning and fixing structure (225) forms the smoke outlet space (221) with the upper part of the horizontal flue structure (224), the first partitioning and fixing structure (225) and the second partitioning and fixing structure (226) form the smoke inlet space (222), and the second partitioning and fixing structure (226) forms the ash outlet space (223) with the lower part of the horizontal flue structure (224).

2. The biomass boiler apparatus having a multi-tube dust removing mechanism according to claim 1, characterized by, ​ 3. The biomass boiler apparatus having a multi-tube dust removing mechanism according to claim 2, characterized by, The cyclone separator assembly (23) comprises a separation cylinder (231) and a gas outlet cylinder (232), the upper end of the separation cylinder (231) is located in the flue gas inlet space (222), the lower end of the separation cylinder (231) is located in the ash outlet space (223), the upper end of the gas outlet cylinder (232) is located in the flue gas outlet space (221), and the lower end of the gas outlet cylinder (232) is located in the separation cylinder (231).

4. The biomass boiler apparatus having a multi-tube dust removing mechanism according to claim 3, characterized by, The flue gas inlet of the separation cylinder (231) is located on the side of the separation cylinder (231), and the inner wall of the separation cylinder (231) is provided with spiral guide vanes.

5. The biomass boiler apparatus having a multi-tube dust removing mechanism according to claim 4, characterized by, The ratio of the height H of the flue gas inlet of the separation cylinder (231) to the width h of the flue gas inlet of the separation cylinder (231) to the diameter D of the separation cylinder (231) is (20-30):(13-20):(70-90).

6. The biomass boiler apparatus having a multi-tube dust removing mechanism according to claim 4, wherein The separation cylinder (231) is provided with a guide surface located on the opposite side of the flue gas inlet of the separation cylinder (231).

7. The biomass boiler apparatus having a multi-tube dust removing mechanism according to claim 4, wherein The ratio of the diameter of the separation cylinder (231) to the diameter of the gas outlet cylinder (232) is between 1.5 and 3.

8. The biomass boiler apparatus having a multi-tube dust removing mechanism according to any one of claims 1 to 7, characterized by, The ash discharge mechanism (40) comprises an ash discharge connecting shell (41) and an ash discharge pipeline (42), the upper end of the ash discharge pipeline (42) is connected to the lower end of the ash discharge connecting shell (41), the cross-sectional area of the ash discharge connecting shell (41) gradually decreases in the direction from top to bottom, and the included angle between the connecting shell and the horizontal direction is greater than or equal to 70°.

9. The biomass boiler apparatus having a multi-tube dust removing mechanism according to any one of claims 1 to 7, characterized by, The economizer mechanism (30) further comprises a steam soot blowing assembly (33), and the outlet of the steam soot blowing assembly (33) is arranged corresponding to a plurality of heat exchangers (32).

10. A biomass power plant, characterized by The biomass power generation device comprises a biomass boiler device, a steam turbine and a generator, the steam soot blowing assembly is connected to a main steam pipeline, and the biomass boiler device is the biomass boiler device according to any one of claims 1 to 9. The biomass power generation device comprises a biomass boiler device, a steam turbine and a generator, the steam soot blowing assembly is connected to a main steam pipeline, and the biomass boiler device is the biomass boiler device according to any one of claims 1 to 9.

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