Biomass boiler dust removal device

Abstract

The invention relates to the technical field of dust removal equipment, and provides a biomass boiler dust removal device which comprises a filter bag dust remover and a heat exchanger. The shell is provided with a heat exchange space, a flue gas inlet and a flue gas outlet, and the heat exchange space communicates with the outside through the flue gas inlet and the flue gas outlet; the disc-shaped heat exchange pipe is arranged in the heat exchange space, a heat exchange medium passes through the disc-shaped heat exchange pipe and exchanges heat with flue gas in the heat exchange space, the two ends of the disc-shaped heat exchange pipe are located outside the shell, and the disc-shaped heat exchange pipe is located on the same height plane of the heat exchange space; the sliding rod is arranged in the heat exchange space in a sliding mode, the sliding rod is close to or away from the disc-shaped heat exchange pipe after sliding, and the vertical distance between the sliding rod and the disc-shaped heat exchange pipe is fixed. One end of the scraper is rotationally arranged on the sliding rod, the other end of the scraper is used for scraping particle residues on the disc-shaped heat exchange tube, and the rotating axis of the scraper and the axis of the sliding rod are collinear. According to the technical scheme, the problem that in the prior art, smoke dust particles are attached to the surface of the heat exchanger, and heat exchange efficiency is reduced is solved.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal equipment, and in particular to a dust removal device for a biomass boiler. Background Art

[0002] With the growth of energy demand and increasingly stringent environmental protection requirements, biomass energy, as a renewable energy source, has been widely used in heating and power generation. However, biomass boilers produce a lot of smoke and pollutants during the combustion process, posing a threat to the environment and human health. The smoke and pollutants generated by the combustion of biomass boilers need to be removed by dust removal devices before they can be discharged into the atmosphere.

[0003] The existing biomass boiler dust removal device usually uses a pulse bag filter for dust removal. In order to prevent the high-temperature smoke from damaging the filter bag and reducing the service life of the filter bag, a heat exchanger is often added at the inlet of the bag filter to reduce the temperature of the smoke. However, in actual use, due to the characteristics of smoke generated by biomass combustion, some particles in the smoke will adhere to the surface of the heat exchanger, which will affect the heat exchange efficiency over a long period of time, thereby damaging the filter bag. Summary of the invention

[0004] The present invention provides a biomass boiler dust removal device, which solves the problem in the related art that smoke particles adhere to the surface of the heat exchanger and reduce the heat exchange efficiency.

[0005] The technical solution of the present invention is as follows: A biomass boiler dust removal device comprises a bag filter and a heat exchanger, wherein the heat exchanger comprises: A shell, the shell having a heat exchange space, a smoke inlet and a smoke outlet, wherein the heat exchange space is connected to the outside through the smoke inlet and the smoke outlet; A disc-shaped heat exchange tube is arranged in the heat exchange space, the disc-shaped heat exchange tube is used for heat exchange medium to pass through and to exchange heat with the flue gas in the heat exchange space, both ends of the disc-shaped heat exchange tube are located outside the shell, and the disc-shaped heat exchange tube is located at the same height plane of the heat exchange space; A sliding rod, slidably disposed in the heat exchange space, wherein the sliding rod is located above the disc-shaped heat exchange tube; A scraper has one end rotatably disposed on the sliding rod and the other end is used to scrape away particle residues on the disc-shaped heat exchange tube. The rotation axis of the scraper is colinear with the axis of the sliding rod.

[0006] Optionally, there are a plurality of scrapers, and the plurality of scrapers are rotatably disposed on the sliding rod, and the plurality of scrapers are sequentially distributed along the axis direction of the sliding rod, and further comprising: There are a plurality of first elastic members, one of which is disposed between each scraper and the sliding rod, and the first elastic member is used to provide a force for restoring the scraper after rotation.

[0007] Optionally, the disc-shaped heat exchange tube has a plurality of straight tube sections and a plurality of curved tube sections, the plurality of straight tube sections are sequentially staggered and connected with the plurality of curved tube sections, the axis of the straight tube section is parallel to the axis of the sliding rod, and the height of one end of the scraper away from the sliding rod is the same as the axis of the straight tube section, and further comprises: There are two scrapers, which are respectively located on both sides of one end of the scraper away from the sliding rod. After the sliding rod moves, the scrapers abut against the disc-shaped heat exchange tube.

[0008] Optionally, the scraper has a plurality of through holes, and the through holes are used for smoke to pass through.

[0009] Optionally, there are two sliding rods, which are respectively located at the upper and lower sides of the disc-shaped heat exchange tube, and a plurality of scrapers are rotatably disposed on the two sliding rods, and a plurality of scrapers are located between the two sliding rods.

[0010] Optionally, it also includes: A rotation drive device, disposed on the housing, the rotation drive device having a drive end; A screw, one end of which is arranged on the driving end, and the other end of which is rotatably arranged in the heat exchange space; The sliding plate is slidably arranged in the heat exchange space, the sliding rod is slidably arranged in the heat exchange space through the sliding plate, and the sliding plate has a threaded hole, and the threaded hole is threadedly connected with the screw rod.

[0011] Optionally, the housing has a mounting hole and further comprises: A mounting block has one end detachably arranged on the shell and the other end located in the heat exchange space. The mounting hole is used for one end of the mounting block to pass through. The end of the screw rod away from the rotation drive device is rotatably arranged in the heat exchange space through the mounting block.

[0012] Optionally, it also includes: There are several brushes, all of which are arranged on the sliding plate. The several brushes are respectively located around the screw rod. The brushes have bristles, and the bristles are used to scrape the smoke and dust particles on the screw rod.

[0013] Optionally, it also includes: There are several protective covers, all of which are arranged on the sliding plate. The several protective covers are respectively located at one end of the brush member away from the screw rod. The protective covers are used to prevent smoke and dust from falling onto the brush member.

[0014] Optionally, the bag filter dust collector comprises: A box body, the box body being in communication with the smoke outlet; There are several cloth bag supports, all of which are arranged in the box; A blowing pipe is arranged in the box body, and the blowing pipe is located above the cloth bag support; A support is arranged at one end of the bag holder away from the blowing pipe, the support has a bottom and a guiding bevel, the filter bag is located between the support and the bottom, and the guiding bevel is used to guide the wind sprayed from the blowing pipe to the axial direction of the bag holder.

[0015] The working principle and beneficial effects of the present invention are: In the present invention, the shell can be made of a high temperature resistant and corrosion resistant metal material, such as stainless steel. Its shape and size are designed according to the actual installation space and heat exchange requirements. The disc heat exchange tube can be made of a metal material with good thermal conductivity, such as a copper tube. It is installed in the heat exchange space through a bracket or a fixing to ensure that each section of the disc heat exchange tube is at the same height in the heat exchange space, which is convenient for cleaning the smoke and dust attachments on the surface of the disc heat exchange tube. The sliding rod is installed in the heat exchange space through a guide structure such as a guide rail or a slide groove so that it can slide smoothly. The sliding of the sliding rod can be achieved by a driving device such as an electric push rod, a hydraulic push rod or a screw nut mechanism. The scraper is made of a material that is resistant to high temperature and has a certain elasticity and hardness, such as high temperature resistant rubber or special plastic. One end of it is connected to the sliding rod through a rotating shaft, and the axis of the rotating shaft and the sliding rod are colinear to ensure that the scraper can rotate flexibly.

[0016] In actual operation, when it is necessary to clean the particle residue on the disc heat exchange tube, the sliding rod is driven to move toward the disc heat exchange tube so that the scraper contacts the heat exchange tube. As the sliding rod continues to move, the scraper rotates around the rotation axis to scrape off the particles on the heat exchange tube. The combination of the sliding rod and the scraper can timely and effectively remove the particles on the disc heat exchange tube, maintain the heat exchange efficiency, and extend the service life of the equipment. The rotation setting of the scraper enables it to better adapt to the cylindrical shape of the heat exchange tube, so that the scraper can scrape off the particles on the heat exchange tube along the outer wall of the heat exchange tube, improve the cleaning effect, and reduce the cleaning dead corners. This automatic cleaning structure not only reduces the workload and cost of manual maintenance, improves the operating stability and reliability of the equipment, but also can effectively avoid uneven heat exchange and local overheating caused by the attachment of particles, and protect the safe operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0018] Figure 1It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the structure of the heat exchanger of the present invention; Figure 3 Schematic diagram of the internal structure of the heat exchanger of the present invention; Figure 4 A top view of the heat exchanger of the present invention; Figure 5 For the present invention Figure 4 Middle BB section view; Figure 6 For the present invention Figure 5 The enlarged structural diagram at C in the middle; Figure 7 It is a schematic cross-sectional structural diagram of the heat exchanger of the present invention; Figure 8 For the present invention Figure 7 The enlarged structural diagram at D in the middle; Fig. 9 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Fig.10 It is a schematic diagram of the internal structure of the filter bag dust collector of the present invention; Fig.11 It is a schematic diagram of the support structure of the present invention.

[0019] In the figure: 100, filter bag dust collector, 200, heat exchanger, 210, shell, 211, heat exchange space, 212, flue gas inlet, 213, flue gas outlet, 220, disc heat exchange tube, 230, sliding rod, 240, scraper, 250, first elastic member, 221, straight pipe section, 222, curved pipe section, 241, scraper, 242, through hole, 261, rotation drive device, 262, screw, 270, sliding plate, 271, threaded hole, 214, mounting hole, 280, mounting block, 290, brush member, 291, protective cover, 110, box body, 120, bag bracket, 130, injection pipe, 140, support, 141, bottom, 142, guide bevel. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0021] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0022] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] Reference Figure 1 to Figure 11 The present invention proposes a dust removal device for a biomass boiler, comprising a bag filter 100 and a heat exchanger 200, wherein the heat exchanger 200 comprises a shell 210, wherein the shell 210 has a heat exchange space 211, a smoke inlet 212 and a smoke outlet 213, wherein the heat exchange space 211 is connected to the outside through the smoke inlet 212 and the smoke outlet 213; a disc-shaped heat exchange tube 220 is arranged in the heat exchange space 211, and the disc-shaped heat exchange tube 220 is used for heat exchange medium to pass through and to exchange heat with the smoke in the heat exchange space 211, and the disc-shaped heat exchange tube 220 is used for heat exchange medium to pass through and to exchange heat with the smoke in the heat exchange space 211. Both ends of 20 are located outside the shell 210, and the disc heat exchange tube 220 is located at the same height plane of the heat exchange space 211; the sliding rod 230 is slidably arranged in the heat exchange space 211, and the sliding rod 230 slides close to or away from the disc heat exchange tube 220, and the vertical distance between the sliding rod 230 and the disc heat exchange tube 220 is fixed; one end of the scraper 240 is rotatably arranged on the sliding rod 230, and the other end is used to scrape off the particle residue on the disc heat exchange tube 220, and the rotation axis of the scraper 240 is colinear with the axis of the sliding rod 230.

[0025] In this embodiment, the housing 210 can be made of a high temperature resistant and corrosion resistant metal material, such as stainless steel. Its shape and size are designed according to the actual installation space and heat exchange requirements. The disc heat exchange tube 220 can be made of a metal material with good thermal conductivity, such as a copper tube. It is installed in the heat exchange space 211 through a bracket or a fixing to ensure that each section of the disc heat exchange tube 220 is at the same height in the heat exchange space 211, which is convenient for cleaning the smoke and dust attachments on the surface of the disc heat exchange tube 220. The sliding rod 230 is installed in the heat exchange space 211 through a guide structure such as a guide rail or a slide groove, so that it can slide smoothly. The sliding of the sliding rod 230 can be achieved by a driving device such as an electric push rod, a hydraulic push rod or a screw nut mechanism. The scraper 240 is made of a material that is resistant to high temperature and has a certain elasticity and hardness, such as high temperature resistant rubber or special plastic. One end of it is connected to the sliding rod 230 through a rotating shaft, and the axis of the rotating shaft and the sliding rod 230 are colinear to ensure that the scraper 240 can rotate flexibly.

[0026] In actual operation, when it is necessary to clean the particle residue on the disc heat exchange tube 220, the sliding rod 230 is driven to move toward the disc heat exchange tube 220 so that the scraper 240 contacts the heat exchange tube. As the sliding rod 230 continues to move, the scraper 240 rotates around the rotation axis to scrape off the particles on the heat exchange tube. The combination of the sliding rod 230 and the scraper 240 can timely and effectively remove the particles on the disc heat exchange tube 220, maintain the heat exchange efficiency, and extend the service life of the equipment. The rotation setting of the scraper 240 enables it to better adapt to the cylindrical shape of the heat exchange tube, so that the scraper 240 can scrape off the particles on the heat exchange tube along the outer wall of the heat exchange tube, improve the cleaning effect, and reduce the cleaning dead corners. This automatic cleaning structure not only reduces the workload and cost of manual maintenance, improves the operating stability and reliability of the equipment, but also can effectively avoid uneven heat exchange and local overheating caused by the attachment of particles, and protect the safe operation of the equipment.

[0027] Reference Figure 4~Figure 6 Furthermore, there are a plurality of scrapers 240, and the plurality of scrapers 240 are rotatably arranged on the sliding rod 230, and the plurality of scrapers 240 are sequentially distributed along the axial direction of the sliding rod 230, and also include a first elastic member 250, and there are a plurality of first elastic members 250, and a first elastic member 250 is arranged between each scraper 240 and the sliding rod 230, and the first elastic member 250 is used to provide a force for the scraper 240 to reset after rotation.

[0028] In this embodiment, a plurality of scrapers 240, for example, 3 to 5, can be provided, which are made of high temperature resistant and wear-resistant materials, such as high temperature resistant nylon. These scrapers 240 are evenly distributed in sequence along the axial direction of the sliding rod 230. The first elastic member 250 can be a torsion spring. A torsion spring is installed at the connection between each scraper 240 and the sliding rod 230. One end of the torsion spring is fixed on the sliding rod 230, and the other end is fixed on the scraper 240. When the sliding rod 230 drives the scraper 240 to move toward the disc-shaped heat exchange tube 220 and scrape off the particles, the scraper 240 will rotate around its rotation axis, and the torsion spring will deform at this time. When the sliding rod 230 retreats, the restoring force of the torsion spring automatically resets the scraper 240 to the initial position. By sliding the sliding rod 230 in two directions, the particles on both sides of the annular heat exchange tube can be cleaned.

[0029] The arrangement of multiple scrapers 240 can more comprehensively and efficiently scrape off particles on the disc-shaped heat exchange tube 220, thereby improving the cleaning effect. The first elastic member 250 not only ensures that the scraper 240 can accurately and quickly reset after completing the scraping action, so as to prepare for the next cleaning, but also can generate a certain force between the disc-shaped heat exchange tubes 220, which is more conducive to the scraper 240 scraping off particles on the disc-shaped heat exchange tube 220.

[0030] When the scraper 240 moves to the gap of the disc heat exchange tube 220 driven by the sliding rod 230, it is reset under the action of the first elastic member 250 and can also have the effect of knocking the annular heat exchange tube, using vibration to remove particles on the scraper 240 and the annular heat exchange tube.

[0031] Reference Figure 3 , Figure 7 Furthermore, the disc-shaped heat exchange tube 220 has a plurality of straight tube sections 221 and a plurality of curved tube sections 222, and the plurality of straight tube sections 221 and the plurality of curved tube sections 222 are connected in sequence in an alternating manner, and the axis of the straight tube section 221 is parallel to the axis of the sliding rod 230, and the height of one end of the scraper 240 away from the sliding rod 230 is the same as the axis of the straight tube section 221, and also includes a scraper 241, and the scraper 241 has two scrapers 241, which are respectively located on both sides of one end of the scraper 240 away from the sliding rod 230. After the sliding rod 230 moves, the scraper 241 abuts against the disc-shaped heat exchange tube 220.

[0032] In this embodiment, the disc heat exchange tube 220 is composed of a plurality of straight tube sections 221 and curved tube sections 222 connected in sequence. The straight tube sections 221 and the curved tube sections 222 can be made of metal pipes of the same material, such as seamless steel pipes, and there is a gap between adjacent straight tube sections 221. The height of the end of the scraper 240 away from the sliding rod 230 is designed to be the same as the axis of the straight tube section 221 to ensure that it can effectively contact the straight tube section 221 for cleaning. The scraper 241 is made of a high-temperature resistant flexible material, such as a high-temperature resistant silicone sheet or a special high-temperature resistant fiber fabric to prevent the scraper 241 from damaging the surface of the disc heat exchange tube 220. The two scrapers 241 are fixed on both sides of the end of the scraper 240 away from the sliding rod 230 by gluing or riveting, so as to facilitate cleaning of both sides of the disc heat exchange tube 220. When the sliding rod 230 moves, the scraper 240 approaches the disc heat exchange tube 220, and the scraper 241 abuts against the surface of the disc heat exchange tube 220. Since the axis of the straight pipe section 221 is parallel to the axis of the sliding rod 230, the scraper 240 can move along the direction of the straight pipe section 221, and the scraper 241 can use its flexibility to better fit the surface of the heat exchange tube and improve the cleaning effect.

[0033] The straight tube section 221 and the curved tube section 222 of the disc-shaped heat exchange tube 220 are staggered in sequence, which increases the heat exchange area and improves the heat exchange efficiency. The scraper 240 has the same height as the axis of the straight tube section 221 and is provided with a scraper 241 made of a high-temperature resistant flexible material, which can clean the surface of the heat exchange tube more comprehensively and closely, further reduce the residual particles, and reduce the damage to the surface of the heat exchange tube.

[0034] Reference Figure 3 Furthermore, the scraper 240 has a plurality of through holes 242, and the through holes 242 are used for smoke to pass through.

[0035] In this embodiment, a plurality of through holes 242 are evenly distributed on the scraper 240, and the shape of the through holes 242 can be circular, square or other shapes. The size and number of the through holes 242 are reasonably designed according to the size of the scraper 240 and the requirements of smoke circulation. Under the premise of ensuring the strength of the scraper 240, the number and area of ​​the through holes 242 are increased as much as possible to reduce the obstruction to the smoke circulation. When it is not necessary to clean the particles on the surface of the disc heat exchange tube 220, the scraper 240 stays at a position close to the smoke inlet 212, and the scraper 240 can play a role in blocking part of the particles and reducing the attachment of the spacer on the disc heat exchange tube 220. Moreover, when the sliding rod 230 drives the scraper 240 to move to the gap between the adjacent straight pipe sections 221, the scraper 240 can play a role in knocking the straight pipe section 221 under the action of the first elastic member 250, so that the particles attached to the scraper 240 are shaken off.

[0036] Reference Figure 3 , Figure 7Furthermore, there are two sliding rods 230 , which are respectively located at the upper and lower sides of the disc-shaped heat exchange tube 220 , and a plurality of scrapers 240 are respectively rotatably arranged on the two sliding rods 230 , and the plurality of scrapers 240 are all located between the two sliding rods 230 .

[0037] In this embodiment, the sliding rod 230 is made of high-temperature resistant and high-strength metal. The two sliding rods 230 are respectively installed on the upper and lower sides of the disc-shaped heat exchange tube 220, and stable sliding is achieved through guide devices such as guide rails or sliders. The two ends of a plurality of scrapers 240 are respectively rotatably connected to the two sliding rods 230, and the scrapers 240 are evenly distributed between the two sliding rods 230.

[0038] Taking one arrangement as an example, the two sliding rods 230 have a certain distance in the sliding direction, and the scrapers 240 on the two sliding rods 230 have a partial overlapping portion. The distance between the two sliding rods 230 can avoid interference between the rotation of the scrapers 240, and the scrapers 240 on the two sliding rods 230 have an overlapping portion, which can further increase the cleaning area of ​​particles on the surface of the annular heat exchange tube.

[0039] The design of two sliding rods 230 and a plurality of scrapers 240 therebetween can clean the disc-shaped heat exchange tube 220 from both the upper and lower directions, thereby improving the comprehensiveness and efficiency of cleaning, enhancing the stability and reliability of the cleaning device, and reducing the problems of uneven force and incomplete cleaning caused by unilateral cleaning.

[0040] Reference Figure 7 Further, it also includes a rotation driving device 261, which is arranged on the shell 210, and the rotation driving device 261 has a driving end; one end of the screw 262 is arranged at the driving end, and the other end is rotatably arranged in the heat exchange space 211; the sliding plate 270 is slidably arranged in the heat exchange space 211, and the sliding rod 230 is slidably arranged in the heat exchange space 211 through the sliding plate 270, and the sliding plate 270 has a threaded hole 271, and the threaded hole 271 is threadedly connected to the screw 262.

[0041] In this embodiment, the rotation drive device 261 can be a motor, which is fixed to the outside of the housing 210 by bolts. The output shaft of the motor serves as the driving end. The screw 262 is made of a high-strength, wear-resistant metal material, such as alloy steel. One end of the screw 262 is connected to the driving end of the motor through a coupling, and the other end is installed in the heat exchange space 211 through a bearing to ensure that the screw 262 can rotate stably. The sliding plate 270 is made of a high-temperature resistant, wear-resistant metal material, such as stainless steel. A threaded hole 271 matching the screw 262 is machined on the sliding plate 270, and the threaded hole 271 forms a threaded transmission fit with the screw 262. The sliding rod 230 is fixed to the sliding plate 270 by welding, bolting, etc. The connection between the sliding rod 230 and the sliding plate 270 should avoid interference with the rotation of the scraper 240, thereby realizing the sliding of the sliding rod 230 in the heat exchange space 211. During operation, the motor drives the screw rod 262 to rotate. Due to the effect of the threaded connection, the sliding plate 270 moves along the axial direction of the screw rod 262, thereby driving the sliding rod 230 and the scraper 240 to perform a cleaning action.

[0042] The combination of the rotary drive device 261 and the screw 262 can provide accurate and stable driving force, control the moving speed and stroke of the sliding rod 230, and improve the controllability and accuracy of cleaning. The motor-driven method has a high degree of automation, reduces the burden of manual operation, and improves work efficiency. The screw 262 transmission has good self-locking performance, and can maintain the position of the sliding plate 270 and the sliding rod 230 when the motor stops rotating, ensuring the stability of the cleaning work.

[0043] It should be further explained that the portion where the screw 262 passes through the housing 210 should be sealed to prevent smoke in the heat exchange space 211 from escaping from the screw 262. The sliding plate 270 can also block smoke in the heat exchange space 211 to ensure that most of the smoke passes through the through hole 242 of the scraper 240 and contacts the disc-shaped heat exchange tube 220.

[0044] Reference Figure 7~Figure 9 Furthermore, the shell 210 has a mounting hole 214 and also includes a mounting block 280. One end of the mounting block 280 is detachably set on the shell 210, and the other end is located in the heat exchange space 211. The mounting hole 214 is used for one end of the mounting block 280 to pass through, and the end of the screw 262 away from the rotation driving device 261 is rotatably set in the heat exchange space 211 through the mounting block 280.

[0045] In this embodiment, the mounting hole 214 facilitates the installation of the mounting block 280, and the mounting block 280 enables the screw rod 262 to stably rotate in the heat exchange space 211. The detachable structure of the mounting block 280 can prevent the mounting block 280 from affecting the installation of the sliding rod 230 and the scraper 240. In the actual installation process, the mounting block 280 can be installed last through the mounting hole 214.

[0046] The portion of the mounting block 280 located outside the housing 210 can be fixed to the housing 210 by bolts, and a reasonable sealing structure is added between the mounting block 280 and the housing 210 to prevent smoke from leaking from the mounting hole 214 .

[0047] Reference Figure 7~Figure 9 Furthermore, it also includes a brush member 290 , which has a plurality of brush members 290 , all of which are arranged on the sliding plate 270 , and the plurality of brush members 290 are respectively located around the screw rod 262 , and the brush member 290 has bristles, which are used to scrape the smoke and dust particles on the screw rod 262 .

[0048] In this embodiment, the brush member 290 can be made of high temperature resistant and wear-resistant plastic or metal. Each brush member 290 is densely distributed with bristles, and the bristles can be made of materials with certain elasticity and hardness, such as nylon or steel wire. A number of brush members 290 are evenly distributed on the sliding plate 270 and surround the screw 262. The brush member 290 is fixed to the sliding plate 270 by welding, bolt connection or clamping. In the process of the sliding plate 270 moving along the screw 262, the bristles contact the surface of the screw 262 and scrape off the smoke particles attached to the screw 262.

[0049] The brush 290 can timely clean the smoke and dust particles on the screw 262 to prevent the accumulation of particles from affecting the normal rotation and transmission accuracy of the screw 262. Keeping the screw 262 clean helps to extend the service life of the screw 262 and reduce failures caused by wear and jamming. The stability and reliability of the entire drive system are improved, ensuring that the sliding rod 230 can move accurately and smoothly, thereby ensuring the cleaning effect of the scraper 240.

[0050] Reference Figure 7~Figure 9 Furthermore, it also includes a protective cover 291. There are several protective covers 291, all of which are arranged on the sliding plate 270. The several protective covers 291 are respectively located at one end of the brush member 290 away from the screw rod 262. The protective cover 291 is used to prevent smoke and dust from falling onto the brush member 290.

[0051] In this embodiment, the protective cover 291 can be made of a high temperature resistant metal material, such as a stainless steel sheet. Its shape can be customized according to the distribution and position of the brush member 290. The protective cover 291 is fixed to the sliding plate 270 by welding, screw fastening, etc. Each protective cover 291 corresponds to a brush member 290 and is located at one end of the brush member 290 away from the screw 262. The size of the protective cover 291 should be able to completely cover the brush member 290 to reduce the smoke and dust falling on the brush member 290.

[0052] The protective cover 291 reduces the need for frequent cleaning and maintenance of the brush member 290 due to smoke and dust accumulation, thereby extending the service life of the brush member 290.

[0053] Reference Figure 10~Figure 11 Further, the bag filter dust collector 100 includes a box body 110, which is connected to the smoke outlet 213; there are several bag holders 120, all of which are arranged in the box body 110; the blow pipe 130 is arranged in the box body 110, and the blow pipe 130 is located above the bag holder 120; the support 140 is arranged at one end of the bag holder 120 away from the blow pipe 130, the support 140 has a bottom 141 and a guide bevel 142, the filter bag is located between the support 140 and the bottom 141, and the guide bevel 142 is used to guide the wind sprayed from the blow pipe 130 to the axial direction of the bag holder 120.

[0054] In this embodiment, the housing 110 is made of a sturdy and durable metal material, such as carbon steel, and ensures that the connection with the smoke outlet 213 is tight and well sealed. The bag holder 120 is made of a high temperature resistant and corrosion resistant material, such as stainless steel. Several bag holders 120 are evenly distributed in the housing 110 by welding or bolting. The blow pipe 130 is installed in the upper position of the housing 110, connected to the external gas source through a pipeline, and a plurality of blow holes are distributed on its surface. The support 140 is also made of a high temperature resistant material, such as a heat resistant alloy. The support 140 is fixed to the bottom 141 of the bag holder 120, and has a bottom 141 for supporting the filter bag, and a guide bevel 142 is inclined at a certain angle. One end of the bag close to the blow pipe 130 is fixed to the bag holder 120, and the other end is located in the support 140.

[0055] When the blowing pipe 130 is blowing, the gas is ejected from the blowing hole, and when it meets the bottom 141, it will form a rotating wind along the guiding bevel 142, so that the gas can exert pressure on the bag from the side, causing the bag to shake, thereby improving the backblowing effect.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A biomass boiler dust removal device, comprising a bag filter (100) and a heat exchanger (200), characterized in that: The heat exchanger (200) comprises: A shell (210), the shell (210) having a heat exchange space (211), a smoke inlet (212), and a smoke outlet (213), wherein the heat exchange space (211) is connected to the outside through the smoke inlet (212) and the smoke outlet (213); a disc-shaped heat exchange tube (220) disposed in the heat exchange space (211); the disc-shaped heat exchange tube (220) is used for heat exchange medium to pass through and to exchange heat with flue gas in the heat exchange space (211); both ends of the disc-shaped heat exchange tube (220) are located outside the shell (210); and the disc-shaped heat exchange tube (220) is located at the same height plane as the heat exchange space (211); A sliding rod (230) slidably disposed in the heat exchange space (211), the sliding rod (230) being located above the disc-shaped heat exchange tube (220); A scraper (240) has one end rotatably disposed on the sliding rod (230) and the other end is used to scrape away particle residues on the disc-shaped heat exchange tube (220); the rotation axis of the scraper (240) is colinear with the axis of the sliding rod (230).

2. A biomass boiler dust removal device according to claim 1, characterized in that: There are a plurality of scrapers (240), and the plurality of scrapers (240) are all rotatably disposed on the sliding rod (230), and the plurality of scrapers (240) are sequentially distributed along the axis direction of the sliding rod (230), and further comprising: There are a plurality of first elastic members (250), one of which is disposed between each scraper (240) and the sliding rod (230), and the first elastic member (250) is used to provide a force for restoring the scraper (240) after rotation.

3. A biomass boiler dust removal device according to claim 1, characterized in that: The disc-shaped heat exchange tube (220) comprises a plurality of straight tube sections (221) and a plurality of curved tube sections (222), the plurality of straight tube sections (221) and the plurality of curved tube sections (222) being connected in sequence in an alternating manner, the axis of the straight tube section (221) being parallel to the axis of the sliding rod (230), and the height of one end of the scraper (240) away from the sliding rod (230) being the same as the axis of the straight tube section (221), and further comprising: There are two scrapers (241), and the two scrapers (241) are respectively located on both sides of an end of the scraper (240) away from the sliding rod (230). After the sliding rod (230) moves, the scrapers (241) abut against the disc-shaped heat exchange tube (220).

4. A biomass boiler dust removal device according to claim 1, characterized in that: The scraper (240) has a plurality of through holes (242), and the through holes (242) are used for smoke to pass through.

5. The biomass boiler dust removal device according to claim 1, characterized in that: There are two sliding rods (230), and the two sliding rods (230) are respectively located on the upper and lower sides of the disc-shaped heat exchange tube (220); a plurality of scrapers (240) are respectively rotatably arranged on the two sliding rods (230), and the plurality of scrapers (240) are all located between the two sliding rods (230).

6. A biomass boiler dust removal device according to claim 1, characterized in that: Also includes: A rotation drive device (261) is arranged on the housing (210), and the rotation drive device (261) has a drive end; A screw (262), one end of which is disposed on the driving end, and the other end of which is rotatably disposed in the heat exchange space (211); A sliding plate (270) is slidably disposed in the heat exchange space (211); the sliding rod (230) is slidably disposed in the heat exchange space (211) via the sliding plate (270); the sliding plate (270) has a threaded hole (271); and the threaded hole (271) is threadedly connected to the screw rod (262).

7. A biomass boiler dust removal device according to claim 6, characterized in that: The housing (210) has a mounting hole (214) and further comprises: A mounting block (280) has one end detachably mounted on the housing (210) and the other end located in the heat exchange space (211); the mounting hole (214) is used for one end of the mounting block (280) to pass through; and one end of the screw rod (262) away from the rotation drive device (261) is rotatably mounted in the heat exchange space (211) through the mounting block (280).

8. The biomass boiler dust removal device according to claim 6, characterized in that: Also includes: There are a plurality of brush members (290), all of which are arranged on the sliding plate (270). The plurality of brush members (290) are respectively located around the screw rod (262). The brush members (290) have bristles, and the bristles are used to scrape smoke particles on the screw rod (262).

9. A biomass boiler dust removal device according to claim 8, characterized in that: Also includes: There are a plurality of protective covers (291), all of which are arranged on the sliding plate (270). The plurality of protective covers (291) are respectively located at one end of the brush member (290) away from the screw rod (262). The protective covers (291) are used to prevent smoke and dust from falling onto the brush member (290).

10. The dust removal device for a biomass boiler according to claim 1, characterized in that: The filter bag dust collector (100) comprises: A box body (110), the box body (110) being in communication with the smoke outlet (213); A plurality of cloth bag supports (120) are provided, all of which are arranged in the box body (110); A blowing pipe (130) is arranged in the box body (110), and the blowing pipe (130) is located above the cloth bag support (120); A support (140) is arranged at one end of the bag support (120) away from the blowing pipe (130), the support (140) having a bottom (141) and a guide bevel (142), the filter bag is located between the support (140) and the bottom (141), and the guide bevel (142) is used to guide the wind sprayed from the blowing pipe (130) in the axial direction of the bag support (120).

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