A biomass boiler flue gas purification device

Abstract

The present application relates to flue gas purification device technical field, especially a kind of biomass boiler flue gas purification device, specifically including shell, mounting plate, ceramic filter element, lifting drive mechanism and cutting support mechanism;Cutting support mechanism includes cutting support plate and cutting support knife, cutting support plate is equipped with multiple and evenly distributed in the periphery of ceramic filter element, cutting support plate towards the end face of ceramic filter element cutting support knife is equipped with cutting support knife.By setting cutting support mechanism, before blowback, the adherend on the outer wall of ceramic filter element is cut, can greatly reduce the overall adhesion of adherend on the surface of ceramic filter element, facilitate blowback cleaning, effectively solve the problem that conventional blowback mode is not convenient for cleaning viscous material and hard scale, improve the cleaning efficiency of ceramic filter element;During blowback process, cutting support knife can support ceramic filter element, improve the strength of ceramic filter element, improve blowback effect, while avoiding the damage of high-pressure airflow to filter element.

Description

Technical Field

[0001] This invention relates to the field of flue gas purification devices, and in particular to a flue gas purification device for a biomass boiler. Background Technology

[0002] Ceramic fiber filter elements are widely used in boiler flue gas purification. Ceramic fiber filter elements with catalytic function can achieve integrated dry desulfurization, dust removal and denitrification.

[0003] In existing ceramic filter cartridge filtration devices, flue gas dust particles are trapped on the surface of the ceramic filter cartridge. After dust removal, the flue gas passes through the porous ceramic filter cartridge. Under the action of a catalyst on the inner wall of the pores, nitrogen oxides in the flue gas are reduced to nitrogen gas. Then, the clean flue gas is discharged from the top outlet of the ceramic filter cartridge and discharged under the suction of an induced draft fan. The accumulation of dust particles on the surface of the ceramic filter cartridge increases the airflow resistance, leading to a decrease in filtration efficiency. Therefore, regular backflushing and cleaning of the ceramic filter cartridge is necessary.

[0004] However, when biomass fuel has a high humidity, it produces flue gas with high humidity. This causes viscous substances and solidified substances to form on the surface of the ceramic filter element. For example, organic materials such as plastics and rubber decompose under anaerobic conditions to produce tar, and unburned carbon particles combine with it to form a viscous tar-carbon complex. Alkali metal salts such as potassium chloride melt in high-temperature flue gas and solidify rapidly when they encounter low-temperature surfaces (such as ceramic filter elements) as the flue gas flows, forming a glassy adhesion layer. Sulfur trioxide in the flue gas reacts with potassium oxide, calcium oxide, etc. to produce sulfates (potassium sulfate, calcium sulfate), which form hard scale on the surface of the filter element.

[0005] Deposits such as viscous substances and scale adhere strongly to the surface of ceramic filter elements. Conventional low-pressure backflushing methods have insufficient pressure to effectively clean viscous substances and hard scale from the surface of ceramic filter elements. During high-pressure backflushing regeneration, because ceramic filter elements are brittle materials, they are easily broken under the high-speed impact of high-pressure air. Summary of the Invention

[0006] The purpose of this invention is to provide a biomass boiler flue gas purification device to solve problems such as the difficulty in cleaning hard scale on the surface of ceramic filter elements and the easy breakage of filter elements due to high-pressure backflushing.

[0007] To achieve the above objectives, the present invention provides a biomass boiler flue gas purification device, including a shell, a mounting plate, a ceramic filter element, a lifting drive mechanism, and a cutting support mechanism. The ceramic filter element is installed inside the shell through the mounting plate, which divides the shell into a filter chamber and an exhaust chamber. The filter chamber is located below the exhaust chamber. The shell is provided with an air inlet communicating with the filter chamber and an air outlet communicating with the exhaust chamber. The flue gas in the filter chamber enters the exhaust chamber after being purified by the ceramic filter element.

[0008] The cutting support mechanism corresponds one-to-one with the ceramic filter element, including a cutting support plate and a cutting support blade. Multiple cutting support plates are evenly distributed around the periphery of the ceramic filter element, with the length direction of the cutting support plate parallel to the axis of the ceramic filter element. A cutting support blade is mounted on the end face of the cutting support plate facing the ceramic filter element. Driven by a lifting mechanism, the cutting support plate approaches the ceramic filter element, allowing the cutting support blade to cut the deposits on the outer wall of the ceramic filter element. After cutting, the cutting support blade clamps the ceramic filter element to provide support. The cutting support blade can both cut deposits on the surface of the ceramic filter element and provide support during backflushing, preventing high-pressure airflow from damaging the filter element. This innovative structural design achieves dual technical effects, enhancing the practicality of the device.

[0009] Furthermore, the cutting support mechanism also includes guide rods, lifting rods, upper rollers, lower rollers, upper inclined blocks, and lower inclined blocks. At least two guide rods are fixed to the end face of the cutting support plate facing away from the cutting support blade. The guide rods are slidably connected to the lifting rods, which are driven to rise and fall by a lifting drive mechanism. The upper rollers and lower rollers are rotatably connected to the cutting support plate, and both the upper and lower inclined blocks are fixedly connected to the housing. When the lifting rod rises, the inclined surface of the upper inclined block rolls in cooperation with the upper roller to guide the cutting support plate closer to the ceramic filter element. When the lifting rod falls, the inclined surface of the lower inclined block rolls in cooperation with the lower roller to guide the cutting support plate away from the ceramic filter element. Through ingenious mechanical coordination, the cutting support plate achieves stable movement, allowing the cutting blade to move relative to the ceramic filter element with an inclined trajectory, improving the cutting effect on the surface deposits of the ceramic filter element.

[0010] Furthermore, the cutting support mechanism also includes a scraper plate, which corresponds one-to-one with the cutting support plate. The scraper plate is fixedly connected to the housing and is located between the cutting support plate and the ceramic filter element. The scraper plate has a scraping opening for the cutting support blade to pass through. When the cutting support blade passes through the scraping opening, the scraper plate can intercept any adhering substances on the cutting support blade. The scraper plate can promptly clean the adhering substances on the cutting support blade, ensuring the sharpness and cleanliness of the cutting support blade, continuously maintaining the cutting effect, avoiding the impact of adhering substances on cutting efficiency and quality, and further improving the reliability and service life of the device.

[0011] Furthermore, the lifting drive mechanism includes a power push rod, an upper connecting plate, a connecting rod, and a main push plate. The power push rod is fixedly installed at the top of the housing, and its output end is connected to the upper connecting plate. The upper end of the connecting rod is connected to the upper connecting plate, and its lower end extends into the housing and connects to the main push plate. The main push plate is fixedly connected to the lifting rod. Sliding sealing devices, which are slidably sealed to the connecting rod, are installed on both the mounting plate and the housing. The lifting drive mechanism provides a stable power source for the cutting support mechanism. The sliding sealing device ensures the internal sealing of the device, prevents flue gas leakage, and ensures that the flue gas purification process is carried out efficiently in a closed environment, improving the purification effect and safety.

[0012] Furthermore, a distribution plate is fixed inside the housing, dividing the filtration chamber into an air inlet chamber and a purification chamber. The air inlet chamber is located below the purification chamber, and the air inlet is located below the distribution plate. Several air distribution holes are formed on the distribution plate, through which the flue gas in the air inlet chamber enters the purification chamber. The distribution plate ensures that the flue gas entering the filtration chamber is evenly dispersed and enters the purification chamber in an orderly manner through the air distribution holes, avoiding local concentration or uneven flow of flue gas. This ensures that all parts of the ceramic filter element can fully contact the flue gas, improving the uniformity and efficiency of flue gas purification.

[0013] Furthermore, the main push plate has several ventilation holes. The ventilation hole design ensures smooth flow of flue gas within the housing, preventing the main push plate from obstructing the flow of flue gas and affecting the purification efficiency. This allows the flue gas to contact the ceramic filter element evenly, fully utilizing the purification function of the ceramic filter element.

[0014] Furthermore, the cutting support plate is equipped with multiple cutting support blades, with a pressure-reducing gap between adjacent cutting support blades. The arrangement of multiple cutting support blades enhances the ability to cut hard scale buildup on the surface of the ceramic filter element. The pressure-reducing gap design effectively disperses stress during the cutting process, avoiding damage to the ceramic filter element due to stress concentration. This ensures the cutting effect while protecting the filter element and extending its service life.

[0015] Furthermore, it also includes a backflush mechanism, which comprises a high-pressure air reservoir, a pulse backflush valve, a main high-pressure air output pipe, branch high-pressure air output pipes, and nozzles. The output end of the high-pressure air reservoir is connected to the main high-pressure air output pipe. Multiple branch high-pressure air output pipes are connected to the main high-pressure air output pipe, and pulse backflush valves and multiple nozzles are installed on the branch high-pressure air output pipes. Each nozzle corresponds to a ceramic filter element, and the nozzles are located directly above the ceramic filter elements. Using high-pressure air and pulse backflush valves, dust on the surface of the ceramic filter elements can be effectively cleaned.

[0016] Furthermore, it also includes a support frame, on which the housing is fixedly mounted. The support frame provides stable support for the housing, ensuring its stability during operation.

[0017] Furthermore, a slag discharge port is provided at the bottom of the shell, and an ash discharge valve is installed at the slag discharge port. The slag discharge port and ash discharge valve facilitate the timely discharge of dust and other impurities blown down from the backflow, preventing impurities from accumulating inside the shell and affecting the normal operation of the device, ensuring continuous and efficient operation of the device, simplifying the cleaning and maintenance process, and improving work efficiency.

[0018] The beneficial effects of this technical solution are:

[0019] 0. By setting up a cutting support mechanism, the deposits on the outer wall of the ceramic filter element are cut before backflushing, which can greatly reduce the overall adhesion of the deposits on the surface of the ceramic filter element, making it easier to clean by backflushing. This effectively solves the problem that conventional backflushing methods are not convenient for cleaning viscous substances and hard scale, and improves the cleaning efficiency of the ceramic filter element.

[0020] 1. During the backflushing process, the cutting support blade can support the ceramic filter element, which improves the strength of the ceramic filter element, enhances the backflushing effect, and avoids damage to the filter element by high-pressure airflow. Attached Figure Description

[0021] Figure 1 A schematic diagram of the structure of the biomass boiler flue gas purification device provided in the embodiments of this application;

[0022] Figure 2 A perspective view of a biomass boiler flue gas purification device provided in an embodiment of this application;

[0023] Figure 3 Rear view of the biomass boiler flue gas purification device provided in the embodiments of this application;

[0024] Figure 4 A side view of the biomass boiler flue gas purification device provided in an embodiment of this application;

[0025] Figure 5 for Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 6 for Figure 1 A magnified view of a section at point B in the middle;

[0027] Figure 7 for Figure 4 A cross-sectional view along the CC line;

[0028] Figure 8 for Figure 7 A magnified view of a section at point D;

[0029] Figure 9 This is a schematic diagram of the structure of the ceramic filter element and cutting support mechanism provided in the embodiments of this application;

[0030] In the diagram, 100 is the housing; 110 is the filter chamber; 111 is the air inlet chamber; 112 is the purification chamber; 120 is the exhaust chamber; 130 is the air inlet; 140 is the air outlet; 150 is the slag discharge port; 200 is the mounting plate; 300 is the ceramic filter element; 400 is the lifting drive mechanism; 410 is the power push rod; 420 is the upper connecting plate; 430 is the connecting rod; 440 is the main push plate; 441 is the ventilation hole; 450 is the sliding sealing device; 500 is the cutting support mechanism; and 510 is the cutting support plate. 520. Cutting support blade; 530. Guide rod; 540. Lifting rod; 550. Upper roller; 560. Lower roller; 570. Upper inclined block; 580. Lower inclined block; 590. Scraper plate; 591. Scraper nozzle; 600. Air distribution plate; 610. Air distribution hole; 700. Backflush mechanism; 710. High-pressure air storage tank; 720. Pulse backflush valve; 730. High-pressure air main output pipe; 740. High-pressure air branch output pipe; 750. Nozzle; 800. Bracket; 900. Ash discharge valve. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Please see Figures 1 to 9 This application provides a biomass boiler flue gas purification device, including a shell 100, a mounting plate 200, a ceramic filter element 300, a lifting drive mechanism 400, and a cutting support mechanism 500.

[0033] like Figure 1 As shown, the ceramic filter element 300 is installed inside the housing 100 via the mounting plate 200. The ceramic filter element 300 is a high-temperature ceramic fiber tube for denitrification and dust removal, open at the top and closed at the bottom. The ceramic filter elements 300 are arranged in a matrix. The upper part of the housing 100 is square, with the ceramic filter elements 300 located at the top of the housing 100. The lower part of the housing 100 gradually narrows to facilitate the accumulation of filtered impurities. In other embodiments, the upper part of the housing 100 may also be cylindrical, and correspondingly, the ceramic filter elements 300 are arranged in a ring.

[0034] Mounting plate 200 divides housing 100 into filter chamber 110 and exhaust chamber 120. Filter chamber 110 is located below exhaust chamber 120. Housing 100 is provided with air inlet 130 communicating with filter chamber 110 and air outlet 140 communicating with exhaust chamber 120. Flue gas generated by biomass boiler enters filter chamber 110 through air inlet 130. Dust particles are trapped on the surface of ceramic filter element 300. After dust removal, flue gas passes through porous ceramic filter element 300. Under the action of catalyst on porous inner wall, nitrogen oxides in flue gas are reduced to nitrogen. Then, clean flue gas is discharged from the top of ceramic filter element 300 to exhaust chamber 120 and discharged through air outlet 140. Under the suction of external induced draft fan, it is discharged into chimney.

[0035] The cutting support mechanism 500 corresponds one-to-one with the ceramic filter element 300, such as... Figure 5 , Figure 6 , Figure 8 , Figure 9 As shown, the cutting support mechanism 500 includes a cutting support plate 510 and a cutting support blade 520. In this embodiment, four cutting support plates 510 are evenly distributed around the ceramic filter element 300. In other embodiments, two, three, five, or more cutting support plates 510 can be used. The number of cutting support plates 510 is not limited. However, it should be noted that the more cutting support plates 510 there are, the better the support stability of the ceramic filter element 300 and the better the cutting and dispersing effect on the attached materials. However, the space occupied will be larger and the cost will be higher. Generally, the number of cutting support plates 510 should not exceed 12, and it is better to set the number of cutting support plates 510 to 4 to 8. The length direction of the cutting support plate 510 is parallel to the axial direction of the ceramic filter element 300, and the cutting support blade 520 is installed on the end face of the cutting support plate 510 facing the ceramic filter element 300. The length of the cutting support plate 510 is adapted to the length of the ceramic filter element 300, and the working range of the cutting support blade 520 is adapted to the length of the ceramic filter element 300, ensuring that the working range of the cutting support blade 520 can maximize the coverage of the ceramic filter element 300.

[0036] When using a biomass boiler flue gas purification device, the ceramic filter element 300 needs to be cleaned regularly. When the biomass fuel has a high moisture content, viscous substances or scale may appear on the surface of the ceramic filter element 300, and these substances have a strong adhesion to the surface of the ceramic filter element 300.

[0037] When using low-pressure backflushing for regeneration, the pressure acting on the filter element is <1200 Pa. Due to the low pressure, the risk of breakage of the ceramic filter element 300 is low, but it is not easy to efficiently clean the surface of the ceramic filter element 300 with viscous substances or scale. The best backflushing air source is high-pressure air, but if the high-pressure air backflushing air source acts directly on the ceramic filter element 300, the high-speed and high-pressure airflow can easily damage the filter element.

[0038] Therefore, to improve the cleaning effect on the ceramic filter element 300 and prevent its breakage, before backflushing, the cutting support plate 510, driven by the lifting drive mechanism 400, approaches the ceramic filter element 300, allowing the cutting support blade 520 to cut off deposits such as viscous substances and scale on the outer wall of the ceramic filter element 300. The cutting support blade 520 cuts and disperses deposits that are difficult to backflush from the surface of the ceramic filter element 300. In particular, after the deposits wrapped around the ceramic filter element 300 are cut and dispersed, the overall adhesion on the surface of the ceramic filter element 300 is greatly reduced, facilitating backflushing cleaning. During cutting, scale may also detach from the ceramic filter element 300, further facilitating backflushing cleaning.

[0039] When the cutting support plate 510 moves to the position closest to the ceramic filter element 300 under the drive of the lifting drive mechanism 400, each cutting support blade 520 simultaneously clamps the ceramic filter element 300. The cutting support blade 520 forms a support point by contacting the outer wall of the ceramic filter element 300, which can support the ceramic filter element 300.

[0040] During backflushing, high-pressure gas enters the ceramic filter element 300 and is discharged through the outer wall of the ceramic filter element 300. Due to the support of the cutting support blade 520 on the ceramic filter element 300, the risk of damage to the ceramic filter element 300 caused by the high-pressure airflow can be effectively reduced.

[0041] In one implementation of this application, to achieve the cutting support blade 520 cutting the surface attachments of the ceramic filter element 300, such as... Figure 5 , Figure 6 , Figure 8 , Figure 9 As shown, the cutting support mechanism 500 also includes guide rods 530, lifting rods 540, upper rollers 550, lower rollers 560, upper inclined blocks 570, and lower inclined blocks 580. Four guide rods 530 are fixed to the end face of the cutting support plate 510 facing away from the cutting support blade 520. The lifting rods 540 have circular holes through which the guide rods 530 pass, and the guide rods 530 are slidably connected to the lifting rods 540 through these holes. In other embodiments, guide sleeves can also be fixed to the lifting rods 540, and the guide sleeves can be slidably connected to the guide rods 530. The lifting rods 540 are driven to rise and fall by the lifting drive mechanism 400.

[0042] The cutting support plate 510 is rotatably connected to an upper roller 550 and a lower roller 560. By fixing a fixed shaft at both the upper and lower ends of the cutting support plate 510, the upper roller 550 and the lower roller 560 are rollers with built-in bearings. The upper roller 550 and the lower roller 560 are respectively installed on the fixed shafts at the upper and lower ends of the cutting support plate 510, thereby realizing the upper rotatable connection between the cutting support plate 510 and the upper roller 550 and the lower roller 560.

[0043] Both the upper inclined block 570 and the lower inclined block 580 are fixedly connected to the housing 100. The upper inclined block 570 is fixed to the lower end of the mounting plate 200. Both the upper inclined block 570 and the lower inclined block 580 have inclined surfaces.

[0044] When the lifting drive mechanism 400 drives the lifting rod 540 to rise, the lifting rod 540 drives the cutting support plate 510, the upper roller 550, and the lower roller 560 to rise. The inclined surface of the upper inclined block 570 rolls in cooperation with the upper roller 550. At the same time, under the guidance of the guide rod 530, the inclined surface of the upper inclined block 570 guides the cutting support plate 510 closer to the ceramic filter element 300. The cutting support blade 520 rises and approaches the ceramic filter element 300, that is, it cuts the attachments on the surface of the ceramic filter element 300 at an upward angle, which has the following advantages:

[0045] 2. The upward-tilting cutting method changes the direction and angle of the cutting force, allowing the component force generated when the cutting support blade 520 contacts the deposit to better peel off the hard scale. Compared with direct radial cutting, the blade can more easily cut into the interior of the deposit during tilted cutting, reducing cutting resistance and improving cutting efficiency.

[0046] 3. The reaction force on the cutting support blade 520 during the inclined cutting process is relatively small and the force is relatively uniform. This reduces the friction and wear between the blade and the attached material, reduces the wear of the cutting support blade 520, thereby reducing the frequency of blade replacement and maintenance costs, and improving the economic efficiency of the device operation.

[0047] 4. The upward-sloping cutting trajectory allows the cutting support blade 520 to cover a larger area of ​​the ceramic filter element 300 surface, avoiding blind spots caused by a single cutting angle, improving the cleaning effect, and ensuring the filtration performance of the ceramic filter element 300.

[0048] 5. The chips generated by the inclined cutting are more likely to fall off from the cutting area under the action of cutting force and their own gravity, and will not accumulate in large quantities between the cutting support blade 520 and the ceramic filter element 300, reducing the possibility of chip blockage and ensuring the continuous and efficient operation of the cutting support mechanism 500.

[0049] 6. The ceramic filter element 300 is relatively brittle. The concentrated pressure generated when cutting it radially directly can easily cause local stress overload, leading to cracking or damage. However, cutting it at an angle upwards can distribute the pressure along the inclined trajectory, making the ceramic filter element 300 more evenly and gently stressed. This effectively reduces the risk of breakage caused by uneven stress, greatly ensuring the integrity of the filter element and improving the economy and stability of equipment operation.

[0050] Both the upper roller 550 and the lower roller 560 have buffer rings made of high-temperature resistant elastic materials such as ceramic aerogel and nickel-based alloy foam on their wheel surfaces. These rings have a certain degree of elasticity and can play a buffering role to prevent the cutting support knife 520 from rigidly contacting the filter element and causing damage to the filter element.

[0051] After the backflushing is completed, when the lifting drive mechanism 400 drives the lifting rod 540 to descend, the inclined surface of the lower inclined block 580 rolls with the lower roller 560. At the same time, under the guidance of the guide rod 530, the inclined surface of the lower inclined block 580 guides the cutting support plate 510 away from the ceramic filter element 300, which facilitates the normal operation of the ceramic filter element 300.

[0052] In another implementation, the guide rod 530, lifting rod 540, upper roller 550, lower roller 560, upper inclined block 570, and lower inclined block 580 in the cutting support mechanism 500 can be replaced with hydraulic push rods. These hydraulic push rods are fixedly installed inside the housing 100, and each hydraulic push rod corresponds one-to-one with the cutting support plate 510. The hydraulic push rods push the cutting support plate 510 closer to and further away from the ceramic filter element 300. However, this method has the drawbacks of higher cost and the hydraulic push rods being easily damaged in high-temperature flue gas environments.

[0053] Optionally, to ensure the sharpness and cleanliness of the cutting support blade 520, such as Figure 8 As shown, the cutting support mechanism 500 also includes a scraper plate 590, which corresponds one-to-one with the cutting support plate 510. The scraper plate 590 is fixedly connected to the housing 100 and is located between the cutting support plate 510 and the ceramic filter element 300. The scraper plate 590 has a scraper opening 591 for the cutting support blade 520 to pass through. The upper end of the scraper plate 590 is fixedly connected to the mounting plate 200, which can achieve a stable fixed connection between the scraper plate 590 and the housing 100.

[0054] When the cutting support blade 520 approaches the ceramic filter element 300, the cutting support blade 520 will pass through the scraper opening 591. The scraper plate 590 can intercept the adhering objects on the cutting support blade 520, clean the adhering objects on the cutting support blade 520 in time, ensure the sharpness and cleanliness of the cutting support blade 520, maintain the cutting effect continuously, avoid the adhering objects affecting the cutting efficiency and quality, and further improve the reliability and service life of the device.

[0055] Furthermore, such as Figure 5 and Figure 8 As shown, a distribution plate 600 is fixed inside the housing 100. The distribution plate 600 divides the filter chamber 110 into an air inlet chamber 111 and a purification chamber 112. The air inlet chamber 111 is located below the purification chamber 112, and the air inlet 130 is located below the distribution plate 600. Several distribution holes 610 are opened on the distribution plate 600. The flue gas in the air inlet chamber 111 enters the purification chamber 112 through the distribution holes 610.

[0056] The flue gas generated by the biomass boiler enters the air inlet chamber 111 through the air inlet 130 of the shell 100, and enters the purification chamber 112 after being evenly distributed through the air distribution holes 610 on the air distribution plate 600.

[0057] The air distribution plate 600 allows the flue gas entering the filter chamber 110 to be evenly dispersed and enter the purification chamber 112 in an orderly manner through the air distribution holes 610, avoiding local concentration of flue gas or uneven flow rate, ensuring that all parts of the ceramic filter element 300 can fully contact the flue gas, and improving the uniformity and efficiency of flue gas purification.

[0058] The downward inclined block 580 is fixed to the air distribution plate 600. The air distribution plate 600 facilitates the fixing of the downward inclined block 580, since the air distribution plate 600 is fixedly connected to the housing 100. Therefore, the downward inclined block 580 and the housing 100 can be fixedly connected.

[0059] The air distribution plate 600 has an opening for the lifting rod 540 to pass through. The lifting rod 540 is slidably connected to the opening, so that the air distribution plate 600 also plays a guiding role in the lifting, so that the main push plate 440 drives the lifting rod 540 to rise and fall steadily in a straight line.

[0060] The lower end of the scraper blade 590 is fixedly connected to the air distribution plate 600, which can achieve a stable fixed connection between the scraper blade 590 and the housing 100.

[0061] Furthermore, such as Figure 1 and Figure 5 As shown, the lifting drive mechanism 400 includes a power push rod 410, an upper connecting plate 420, a connecting rod 430, and a main push plate 440. The power push rod 410 is fixedly installed on the top of the housing 100. The output end of the power push rod 410 is connected to the upper connecting plate 420. The upper end of the connecting rod 430 is connected to the upper connecting plate 420. The lower end of the connecting rod 430 extends into the housing 100 and is connected to the main push plate 440. The main push plate 440 is fixedly connected to the lifting rod 540. Both the mounting plate 200 and the housing 100 are equipped with sliding sealing devices 450 that are slidably sealed to the connecting rod 430.

[0062] The power push rod 410 is a hydraulic cylinder, but it can also be an electric push rod or a pneumatic cylinder. There are two connecting rods 430. The power push rod 410 drives the upper connecting plate 420, the connecting rod 430 and the main push plate 440 to rise and fall. The main push plate 440 drives the lifting rod 540 to rise and fall. The lifting drive mechanism 400 provides a stable power source for the cutting support mechanism 500.

[0063] The sliding sealing device 450 uses existing high-temperature ceramic packing seals, but flexible graphite packing seals, metal bellows mechanical seals, and high-temperature alloy labyrinth seals can also be used. The sliding sealing device 450 ensures the internal sealing of the device, prevents flue gas leakage, and ensures that the flue gas purification process is carried out efficiently in a closed environment, improving purification effect and safety.

[0064] The main push plate 440 has several ventilation holes 441. The design of the ventilation holes 441 ensures smooth flow of flue gas within the housing 100, avoids the main push plate 440 from obstructing the flow of flue gas and affecting the purification efficiency, and allows the flue gas to come into uniform contact with the ceramic filter element 300, so as to give full play to the purification function of the ceramic filter element 300.

[0065] In one implementation of this application, such as Figure 5 , Figure 6 , Figure 9 As shown, multiple cutting support blades 520 are mounted on the cutting support plate 510, with a pressure-reducing gap between adjacent cutting support blades 520. The arrangement of multiple cutting support blades 520 enhances the cutting ability against hard scale buildup on the surface of the ceramic filter element 300. The pressure-reducing gap design effectively disperses stress during the cutting process, preventing damage to the ceramic filter element 300 due to stress concentration. This ensures the cutting effect while protecting the filter element and extending its service life.

[0066] In one implementation of this application, such as Figure 1 , Figure 3 , Figure 4 , Figure 7 As shown, a backflush mechanism 700 is also provided. The backflush mechanism 700 includes a high-pressure air storage tank 710, a pulse backflush valve 720, a high-pressure air main output pipe 730, a high-pressure air branch output pipe 740, and nozzles 750. The output end of the high-pressure air storage tank 710 is connected to the high-pressure air main output pipe 730. Multiple high-pressure air branch output pipes 740 are connected to the high-pressure air main output pipe 730. The pulse backflush valve 720 and multiple nozzles 750 are installed on the high-pressure air branch output pipes 740. Each nozzle 750 corresponds to a ceramic filter element 300 and is located directly above the ceramic filter element 300.

[0067] The ceramic filter elements 300 are arranged in a matrix, divided into multiple rows. Each row corresponds to a high-pressure air branch output pipe 740. By controlling the corresponding pulse backflush valves 720 to open sequentially, the high-pressure gas in the high-pressure air storage tank 710 can enter the corresponding high-pressure air branch output pipe 740 through the high-pressure air main output pipe 730, and then be directly sprayed by the nozzle 750 onto the corresponding ceramic filter element 300, so that the deposits accumulated on the surface of the ceramic filter element 300 are removed and fall into the lower part of the housing 100, realizing the high-pressure backflush cleaning operation.

[0068] Employing high-pressure air and a pulse backflush valve 720, it enables rapid on / off switching and precise control of backflush time and airflow. While effectively cleaning dust from the surface of the ceramic filter element 300, it avoids adding extra load to the exhaust fan, reduces operating costs, and improves backflush efficiency and the economics of the device.

[0069] In one implementation of this application, such as Figures 1 to 4 As shown, a bracket 800 is also provided, and the housing 100 is fixedly mounted on the bracket 800. The bracket 800 provides stable support for the housing 100, ensuring the stability of the housing 100 during operation.

[0070] In one implementation of this application, such as Figures 1 to 4 As shown, the bottom of the housing 100 is provided with a slag discharge port 150, and an ash discharge valve 900 is installed at the slag discharge port 150.

[0071] The filtered dust and other impurities accumulate at the lower part of the shell 100. The slag discharge port 150 and the ash discharge valve 900 facilitate the timely discharge of dust and other impurities, preventing impurities from accumulating inside the shell 100 and affecting the normal operation of the device, ensuring the continuous and efficient operation of the device, simplifying the cleaning and maintenance process, and improving work efficiency.

[0072] It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the scope of protection of this invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0073] In the description of this invention, it should be understood that the terms "length", "upper", "lower", "top", "bottom", "inner", "outer", "radial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0074] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. A biomass boiler flue gas purification device, comprising: The system comprises a housing (100), a mounting plate (200), a ceramic filter element (300), and a backflushing mechanism (700). The ceramic filter element (300) is installed inside the housing (100) via the mounting plate (200). The mounting plate (200) divides the housing (100) into a filter chamber (110) and an exhaust chamber (120). The housing (100) is provided with an air inlet (130) communicating with the filter chamber (110) and an air outlet (140) communicating with the exhaust chamber (120). The flue gas in the filter chamber (110) enters the exhaust chamber (120) after being purified by the ceramic filter element (300). The system is characterized by further comprising a lifting drive mechanism (400) and a cutting support mechanism (500). The cutting support mechanism (500) corresponds one-to-one with the ceramic filter element (300). The cutting support mechanism (500) includes a cutting support plate (510) and a cutting support blade (520). The cutting support plate (510) is provided with multiple blades and is evenly distributed around the ceramic filter element (300). Multiple cutting support blades (520) are installed on the end face of the cutting support plate (510) facing the ceramic filter element (300). There is a pressure reduction gap between adjacent cutting support blades (520). The cutting support plate (510) can approach the ceramic filter element (300) under the drive of the lifting drive mechanism (400) so that the cutting support blades (520) can cut the attachments on the outer wall of the ceramic filter element (300). After the cutting is completed, the ceramic filter element (300) is clamped by the cutting support blades (520) to support the ceramic filter element (300). The cutting support mechanism (500) further includes a guide rod (530), a lifting rod (540), an upper roller (550), a lower roller (560), an upper inclined block (570), and a lower inclined block (580). At least two guide rods (530) are fixed to the end face of the cutting support plate (510) facing away from the cutting support blade (520). The guide rods (530) are slidably connected to the lifting rods (540). The lifting rods (540) are driven to rise and fall by a lifting drive mechanism (400). The cutting support plate (510) is rotatably connected to... The upper roller (550) and lower roller (560), the upper inclined block (570) and lower inclined block (580) are all fixedly connected to the housing (100); when the lifting rod (540) rises, the inclined surface of the upper inclined block (570) rolls with the upper roller (550) to guide the cutting support plate (510) closer to the ceramic filter element (300); when the lifting rod (540) falls, the inclined surface of the lower inclined block (580) rolls with the lower roller (560) to guide the cutting support plate (510) away from the ceramic filter element (300). The lifting drive mechanism (400) includes a power push rod (410), an upper connecting plate (420), a connecting rod (430), and a main push plate (440). The power push rod (410) is fixedly installed on the top of the housing (100). The output end of the power push rod (410) is connected to the upper connecting plate (420). The upper end of the connecting rod (430) is connected to the upper connecting plate (420). The lower end of the connecting rod (430) extends into the housing (100) and is connected to the main push plate (440). The main push plate (440) is fixedly connected to the lifting rod (540). The main push plate (440) has several ventilation holes (441). The mounting plate (200) and the housing (100) are both equipped with sliding sealing devices (450) that are slidably sealed to the connecting rod (430).

2. The biomass boiler flue gas purification device according to claim 1, characterized in that, The cutting support mechanism (500) also includes a scraper plate (590), which corresponds one-to-one with the cutting support plate (510). The scraper plate (590) is fixedly connected to the housing (100). The scraper plate (590) is located between the cutting support plate (510) and the ceramic filter element (300). The scraper plate (590) has a scraper opening (591) for the cutting support knife (520) to pass through. When the cutting support knife (520) passes through the scraper opening (591), the scraper plate (590) can intercept the attached material on the cutting support knife (520).

3. The biomass boiler flue gas purification device according to claim 2, characterized in that, A distribution plate (600) is fixed inside the housing (100). The distribution plate (600) divides the filter chamber (110) into an air inlet chamber (111) and a purification chamber (112). The air inlet chamber (111) is located below the purification chamber (112), and the air inlet (130) is located below the distribution plate (600). Several distribution holes (610) are opened on the distribution plate (600). The flue gas in the air inlet chamber (111) enters the purification chamber (112) through the distribution holes (610).

4. The biomass boiler flue gas purification device according to claim 1, characterized in that, The backflush mechanism (700) includes a high-pressure air reservoir (710), a pulse backflush valve (720), a high-pressure air main output pipe (730), a high-pressure air branch output pipe (740), and a nozzle (750). The output end of the high-pressure air reservoir (710) is connected to the high-pressure air main output pipe (730). Multiple high-pressure air branch output pipes (740) are connected to the high-pressure air main output pipe (730). The pulse backflush valve (720) and multiple nozzles (750) are installed on the high-pressure air branch output pipes (740). Each nozzle (750) corresponds to a ceramic filter element (300), and the nozzle (750) is located directly above the ceramic filter element (300).

5. The biomass boiler flue gas purification device according to claim 1, characterized in that, It also includes a bracket (800), and the housing (100) is fixedly mounted on the bracket (800).

6. The biomass boiler flue gas purification device according to claim 1, characterized in that, The bottom of the shell (100) is provided with a slag discharge port (150), and an ash discharge valve (900) is installed at the slag discharge port (150).

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