High-temperature resistant metallic fiber bag filter

Abstract

The present invention belongs to the technical field of dust collectors, and particularly relates to a high-temperature resistant metal fiber bag dust collector. The high-temperature resistant metal fiber bag dust collector includes a centralized channel, a dust hopper, and an ash chute. A plurality of dust hoppers are arranged below the centralized channel. A hollow cavity is formed in the middle of the centralized channel. A dispersion cylinder is arranged at the position of the hollow cavity. The upper end of the dispersion cylinder is connected with an input pipeline. The input pipeline passes through the hollow cavity. A plurality of filter bags are fixedly connected to the top in each dust hopper. The dust hopper is communicated with the centralized channel through the plurality of filter bags. The input pipeline is used for inputting untreated tail gas, and the centralized channel is used for centralized treated tail gas. The high-temperature resistant metal fiber bag dust collector of the present invention adopts a metal fiber bag filter bag with high temperature resistance, corrosion resistance, high strength, and good wear resistance. The interception efficiency is high, which can meet the requirements of ultra-low emissions, is easy to clean ash, and has a long service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of dust collectors, and particularly relates to a high-temperature resistant metal fiber bag type dust collector. Background Art

[0002] A dust collector is a commonly used facility in boilers and industrial production. Through a pipeline gas path, the dust-containing gas is transported to the dust removal device, where gas-solid separation is carried out. After that, the dust is collected in the dust removal device, and the clean gas is introduced into the main pipe or directly discharged into the atmosphere. The performance of a dust collector is expressed by the amount of gas that can be processed, the resistance loss when the gas passes through the dust collector, and the dust removal efficiency. The price of the dust collector, the operation and maintenance costs, the length of the service life, and the ease of operation and management are also important factors to consider its performance.

[0003] The internal structure of the existing dust collectors is complex. When dust removal is carried out, dust settlement is likely to occur in the air inlet system. At the same time, during use, the filter bag and the cage are integrally installed in the dust collector, with a complex structure. During use, serious dust accumulation occurs, and the accumulation of dust is likely to cause metal corrosion and reduce the service life of the equipment. Summary of the Invention

[0004] Based on the technical problem that the internal structure of the existing dust collectors is complex and dust settlement is likely to occur in the air inlet system when dust removal is carried out, the present invention provides a high-temperature resistant metal fiber bag type dust collector.

[0005] The high-temperature resistant metal fiber bag type dust collector provided by the present invention includes a centralized channel, a hopper, and an ash trough. A plurality of hoppers are arranged below the centralized channel. A hollow cavity is formed in the middle of the centralized channel. A dispersion cylinder is arranged at the position of the hollow cavity. The upper end of the dispersion cylinder is connected with an input pipeline, and the input pipeline passes through the hollow cavity. A plurality of filter bags are fixedly connected to the top of each hopper. The hopper is communicated with the centralized channel through the plurality of filter bags. The input pipeline is used for inputting untreated tail gas, and the centralized channel is used for centralized treatment of the tail gas;

[0006] One side of each connecting cylinder is communicated with the dispersion cylinder through an upper connecting pipe and a lower connecting pipe. The upper connecting pipe is arranged above the lower connecting pipe. The installation angles of the upper connecting pipe and the lower connecting pipe are inclined and both inclined towards the side of the dispersion cylinder. A cleaning mechanism is arranged on the inner wall of the dispersion cylinder. A connecting sleeve frame is fixedly connected between the lower ends of the plurality of filter bags in the hopper. The connecting sleeve frame is connected with a linkage shaft, and the linkage shaft is connected with the cleaning mechanism;

[0007] The connecting cylinder is connected with an ash pipe. The lower end of each ash pipe and the lower end of the dispersion cylinder are both communicated with the ash trough. A partition mechanism is arranged at the connection between the lower end of the dispersion cylinder and the ash trough. The ash trough is used for transporting dust;

[0008] The cleaning mechanism includes two scraping bars, which are symmetrically and slidably arranged on both sides of the inner wall of one side of the dispersion cylinder. The lower end of the linkage shaft passes through the lower connecting pipe and is inserted into the dispersion cylinder, and is fixedly connected with a moving shaft. On both sides of the upper end of the moving shaft, moving rails are symmetrically arranged. Fixed rails are also arranged on the inner wall of the dispersion cylinder. Sliders are fixedly connected to both scraping bars, and the sliders are simultaneously slidably inserted on the fixed rails and the moving rails;

[0009] When a relatively large amount of dust accumulates on the surface area of the filter bag, the connecting sleeve frame and the filter bag will form a relative surface. Affected by the tail gas transported, the relative surface will float upward, thus pulling the lower connecting pipe and the moving shaft upward;

[0010] The fixed rail is arranged at the position between the scraping bar and the moving rail. A first chute is opened on the fixed rail, a second chute is opened on the moving rail, the moving rail is arranged obliquely, and the height difference between the upper end and the lower end of the moving rail is the same as the diameter length of the cross-section of the lower connecting pipe;

[0011] On one side of the upper and lower ends of the scraping bar, a limiting groove is arranged, the limiting groove is fixedly connected to the inner wall of the dispersion cylinder, a limiting block is fixedly connected to the scraping bar, a third chute is opened on the limiting groove, and the limiting block is slidably inserted into the third chute.

[0012] Preferably, the lower surface of the ash trough is inclined, an output port is communicated with one side of the centralized channel, and the output port is used for outputting the processed tail gas.

[0013] Preferably, the partition mechanism includes two baffles that are symmetrically and obliquely inserted into the dispersion cylinder. Connecting rods are rotatably connected to the upper ends of the two baffles. A fixing plate is fixedly connected to the outer surface of the dispersion cylinder. A telescopic shaft is connected between the two connecting rods, and an energized spring is fixedly connected to the telescopic shaft. The end of the energized spring far away from the telescopic shaft is fixedly connected to the fixing plate.

[0014] Preferably, electromagnetic valves are arranged at the positions where the lower ends of each ash pipe are connected to the ash trough. A bag rack is arranged at the upper end of the ash hopper. The upper end of the filter bag is fixedly connected to the bag rack. A pulse jet valve corresponding to the filter bag is installed on the bag rack. The filter bag is made of metal fiber.

[0015] Preferably, a control template is arranged between the ash hopper and the dispersion cylinder. The limiting groove is electrically connected to the control template, and the pulse jet valve is also electrically connected to the control template.

[0016] Preferably, the dispersion cylinder is formed by splicing multiple sides that cooperate with the ash hopper.

[0017] The using method of the high-temperature resistant metal fiber bag filter includes the following steps:

[0018] Step S1: The tail gas generated by the titanium dioxide calcination kiln is transported through the input pipeline into the dispersion cylinder. The tail gas enters the dispersion cylinder and diffuses into the connected connection cylinder through the upper connecting pipe and the lower connecting pipe. The space of the ash hopper is larger than that of the connection cylinder, and the tail gas will eventually enter the ash hopper.

[0019] Step S2: A plurality of filter bags are arranged in the ash hopper, and a centralized channel is communicated with the plurality of ash hoppers. Under the action of pressure, the tail gas will eventually pass through the filter bags to filter out the particulate matter therein.

[0020] Step S3: The filtered tail gas continues to be transported upward and concentrated into the centralized channel, and the treated tail gas is finally discharged through the output port.

[0021] Step S4: When more dust accumulates on the surface of the filter bag, the connecting sleeve frame and the filter bag will form a relative surface. Affected by the transported tail gas, the relative surface will float upward, then the lower connecting pipe and the moving shaft will be pulled upward, and the cleaning mechanism will take effect, so that the two scraping bars move relatively to clean the inner surface of the dispersion cylinder.

[0022] Step S5: As the scraping bar in the cleaning mechanism moves, the position of the limiting block relative to the limiting groove changes, the resistance of the limiting groove connected to the control template changes, and at the same time, the control template controls the pulse jet valve to vibrate the filter bag to clean the dust on the surface of the filter bag.

[0023] Step S6: The dust cleaned in the dispersion cylinder falls and concentrates at the lower end, and the dust in the ash hopper falls and concentrates at the lower end of the ash pipe. The solenoid valve at the lower end of the ash pipe is opened, and the dust in the ash hopper enters the ash trough. The partition mechanism is opened, and the dust in the dispersion cylinder also enters the ash trough.

[0024] Step S7: After the dust enters the ash trough, both the solenoid valve and the partition mechanism are closed, the dust is output through the ash trough, and the ash hopper continues to treat the tail gas.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. The high-temperature resistant metal fiber bag type dust collector adopts metal fiber bag filter bags with high temperature resistance, corrosion resistance, high strength and good wear resistance. It has a high interception efficiency, can meet the requirements of ultra-low emissions, is easy to clean ash, and has a long service life.

[0027] 2. When using this device, the filter bag is directly suspended in the ash hopper without using a cage, which reduces the complexity of the internal structure and maximizes the contact area between the tail gas and the filter bag. At the same time, during use, a connecting sleeve frame is arranged at the lower end of the filter bag and is connected to a cleaning mechanism through a linkage shaft, which plays a role in fixing the filter bag, avoiding the collision and friction of the filter bag, and extending the service life of the system and the filter bag.

[0028] 3. When using this device, when a large amount of dust accumulates on the surface of the filter bag, under the action of air pressure, the opposite side will move upward under the action of high-temperature tail gas. The connecting sleeve frame at the bottom of the filter bag will move upward. Finally, the upward movement of the moving rail will push the slider to slide within the fixed rail, and then the two scraping bars will approach each other under the action of the slider. The scraping bars will scrape the surface of the dispersion cylinder to clean the dust attached during the passage of the tail gas flow, achieving the effect of automatic dust cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic side view structure diagram of the high-temperature resistant metal fiber bag type dust collector proposed by the present invention;

[0030] Figure 2 is a schematic bottom view structure diagram of the high-temperature resistant metal fiber bag type dust collector proposed by the present invention;

[0031] Figure 3 is a schematic partial structure diagram of the high-temperature resistant metal fiber bag type dust collector proposed by the present invention;

[0032] Figure 4 is a schematic top view plane structure diagram of the high-temperature resistant metal fiber bag type dust collector proposed by the present invention;

[0033] Figure 5 is a schematic structure diagram of the partition mechanism;

[0034] Figure 6 is a schematic structure diagram inside the ash hopper;

[0035] Figure 7 is a schematic partial structure diagram inside the dispersion cylinder;

[0036] Figure 8 is Figure 7 an enlarged structure diagram at position A in

[0037] Figure 9 is a schematic structure diagram of the cleaning mechanism;

[0038] Figure 10 is a schematic diagram of the movement trajectories of the moving shaft and the scraping bars.

[0039] In the figure: 1 ash hopper, 2 centralized channel, 3 connecting cylinder, 4 ash pipe, 5 input pipe, 6 output port, 7 dispersion cylinder, 8 upper connecting pipe, 9 lower connecting pipe, 10 ash trough, 11 filter bag, 12 bag rack, 13 linkage shaft, 14 connecting sleeve frame, 15 scraping bar, 16 limiting groove, 17 moving shaft, 18 moving rail, 19 fixed rail, 20 limiting block, 21 slider, 22 baffle, 23 connecting rod, 24 fixing plate, 25 energized spring, 26 telescopic shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0041] Referring to Figures 1 - 10 , a high-temperature resistant metal fiber bag filter, comprising a centralized channel 2, a dust hopper 1 and an ash chute 10. A plurality of dust hoppers 1 are arranged below the centralized channel 2. A hollow cavity is formed in the middle of the centralized channel 2. A dispersion cylinder 7 is arranged at the position of the hollow cavity. The upper end of the dispersion cylinder 7 is connected with an input pipeline 5. The input pipeline 5 passes through the hollow cavity. A plurality of filter bags 11 are fixedly connected to the top in each dust hopper 1. The dust hopper 1 is communicated with the centralized channel 2 through a plurality of filter bags 11. The input pipeline 5 is used for inputting untreated tail gas, and the centralized channel 2 is used for centralized treated tail gas;

[0042] One side of each connecting cylinder 3 is communicated with the dispersion cylinder 7 through an upper connecting pipe 8 and a lower connecting pipe 9. The upper connecting pipe 8 is arranged above the lower connecting pipe 9. The installation angles of the upper connecting pipe 8 and the lower connecting pipe 9 are inclined and both inclined towards the dispersion cylinder 7. A cleaning mechanism is arranged on the inner wall of the dispersion cylinder 7. A connecting sleeve frame 14 is fixedly connected between the lower ends of a plurality of filter bags 11 in the dust hopper 1. The connecting sleeve frame 14 is connected with a linkage shaft 13, and the linkage shaft 13 is connected with the cleaning mechanism;

[0043] The connecting cylinder 3 is connected with an ash pipe 4. The lower end of each ash pipe 4 and the lower end of the dispersion cylinder 7 are both communicated with the ash chute 10. A partition mechanism is arranged at the connection between the lower end of the dispersion cylinder 7 and the ash chute 10. The ash chute 10 is used for transporting dust.

[0044] The lower surface of the ash chute 10 is inclined. An output port 6 is communicated with one side of the centralized channel 2. The output port 6 is used for outputting treated tail gas. When treating the tail gas, the tail gas to be treated is transported into the dispersion cylinder 7 through the input pipeline 5. The tail gas in the dispersion cylinder 7 is transported into each dust hopper 1 through the upper connecting pipe 8 and the lower connecting pipe 9. The filter bags 11 in the dust hopper 1 filter the tail gas. The filtered tail gas will be concentrated in the centralized channel 2 and finally output through the output port 6.

[0045] The partition mechanism includes two baffles 22 symmetrically and obliquely inserted into the dispersion cylinder 7. The upper ends of the two baffles 22 are rotatably connected with a connecting rod 23. A fixing plate 24 is fixedly connected to the outer surface of the dispersion cylinder 7. A telescopic shaft 26 is connected between the two connecting rods 23. An energized spring 25 is fixedly connected to the telescopic shaft 26. One end of the energized spring 25 away from the telescopic shaft 26 is fixedly connected to the fixing plate 24. When dust is collected at the lower end of the dispersion cylinder 7, the partition mechanism is activated. The energized spring 25 contracts when energized, which can cause the telescopic shaft 26 to move upward. The upward movement of the telescopic shaft 26 will drive the connecting rod 23 and the baffle 22 to move upward. The telescopic telescopic shaft 26 can adapt to the width change, so that the two baffles 22 can be separated, and the dust in the dispersion cylinder 7 will fall into the ash trough 10 along the trend, and finally the dust will be output from the ash trough 10.

[0046] The cleaning mechanism includes two scraping strips 15. The two scraping strips 15 are symmetrically and slidably arranged on both sides of the inner wall of one side of the dispersion cylinder 7. The lower end of the linkage shaft 13 passes through the lower connecting pipe 9 and is inserted into the dispersion cylinder 7, and is fixedly connected with a moving shaft 17. Moving rails 18 are symmetrically arranged on both sides of the upper end of the moving shaft 17. A fixed rail 19 is also arranged on the inner wall of the dispersion cylinder 7. Sliders 21 are fixedly connected to both scraping strips 15. The sliders 21 are simultaneously slidably inserted into the fixed rail 19 and the moving rail 18. When the moving shaft 17 moves up and down, the sliders 21 are restricted by the fixed rail 19 and the moving rail 18. When the moving shaft 17 moves, the relative position between the moving rail 18 and the fixed rail 19 will change. The intersection position of the fixed rail 19 and the moving rail 18 is the position of the slider 21. Thus, the position of the two sliders 21 is changed by the movement of the moving rail 18, and then the position of the two scraping strips 15 is changed. As the scraping strips 15 move, the inner wall of the dispersion cylinder 7 can be scraped.

[0047] The fixed rail 19 is arranged at the position between the scraping strip 15 and the moving rail 18. A first chute is opened on the fixed rail 19. A second chute is opened on the moving rail 18. The moving rail 18 is arranged at an inclined angle. The height difference between the upper end and the lower end of the moving rail 18 is the same as the diameter length of the cross-section of the lower connecting pipe 9. The up and down movement range of the moving rail 18 is the diameter length of the lower connecting pipe 9. The up and down movement range of the moving shaft 17 is restricted by the space in the lower connecting pipe 9. The moving rail 18 is arranged at an inclined angle, so that as the moving rail 18 moves up and down, the back-and-forth movement effect of the slider 21 can be realized, and finally the movement effect of the scraping strip 15 can be realized.

[0048] Limit grooves 16 are arranged on one side of the upper and lower ends of the scraping strip 15. The limit grooves 16 are fixedly connected to the inner wall of the dispersion cylinder 7. Limit blocks 20 are fixedly connected to the scraping strip 15. A third chute is opened on the limit groove 16. The limit blocks 20 are slidably inserted into the third chute. The limit blocks 20 move in the third chute in the limit groove 16, and the limit groove 16 plays a role in limiting the scraping strip 15.

[0049] An electromagnetic valve is provided at the connection position between the lower end of each ash pipe 4 and the ash trough 10. A bag rack 12 is provided at the upper end of the ash hopper 1. The upper end of the filter bag 11 is fixedly connected to the bag rack 12. A pulse jet valve corresponding to the filter bag 11 is installed on the bag rack 12. The filter bag 11 is made of metal fiber. When it is necessary to process the dust on the filter bag 11, starting the pulse jet valve can vibrate the filter bag 11 to shake off the dust attached to the surface. The dust falls downward, and the electromagnetic valve is opened to output the dust.

[0050] A control template is provided between the ash hopper 1 and the dispersion cylinder 7. The limit groove 16 is electrically connected to the control template, and the pulse jet valve is also electrically connected to the control template. The dispersion cylinder 7 is composed of a plurality of sides that cooperate with the ash hopper 1.

[0051] A method for using a high-temperature resistant metal fiber bag filter, comprising the following steps:

[0052] Step S1: The tail gas generated by the titanium dioxide calcination kiln is transported through the input pipe 5 into the dispersion cylinder 7. The tail gas enters the dispersion cylinder 7 and diffuses into the connecting cylinder 3 through the upper connecting pipe 8 and the lower connecting pipe 9. The space of the ash hopper 1 is larger than the space of the connecting cylinder 3, and the tail gas will finally enter the ash hopper 1.

[0053] Step S2: A plurality of filter bags 11 are provided in the ash hopper 1, and a central channel 2 is connected to the plurality of ash hoppers 1. Under the action of pressure, the tail gas will finally pass through the filter bags 11 to filter out the particulate matter therein.

[0054] Step S3: The filtered tail gas continues to be transported upward and concentrated into the central channel 2, and the processed tail gas finally discharges through the outlet 6.

[0055] Step S4: When there is more dust accumulated on the surface area of the filter bag 11, the connecting sleeve frame 14 and the filter bag 11 will form a relative surface. The relative surface will float upward under the influence of the transported tail gas, then pull the lower connecting pipe 9 and the moving shaft 17 upward, and the cleaning mechanism will take effect, causing the two scraping bars 15 to move relatively to process and clean the inner surface of the dispersion cylinder 7.

[0056] Step S5: As the scraping bar 15 in the cleaning mechanism moves, the position of the limit block 20 relative to the limit groove 16 changes, the resistance of the limit groove 16 connected to the control template changes, and at the same time, the control template controls the pulse jet valve to vibrate the filter bag 11 to clean the dust on the surface of the filter bag 11.

[0057] Step S6: The dust cleaned in the dispersion cylinder 7 falls and concentrates at the lower end, and the dust in the ash hopper 1 falls and concentrates at the lower end of the ash pipe 4. The electromagnetic valve at the lower end of the ash pipe 4 is opened, and the dust in the ash hopper 1 enters the ash trough 10. The partition mechanism is opened, and the dust in the dispersion cylinder 7 also enters the ash trough 10.

[0058] Step S7: After the dust enters the ash hopper 10, both the solenoid valve and the partition mechanism are closed, and the dust is output through the ash hopper 10, and the ash hopper 1 continues to treat the tail gas.

[0059] The tail gas generated by the titanium dioxide calcination kiln is transported through the input pipeline 5 into the dispersion cylinder 7. There are multiple sides in the dispersion cylinder 7, and each side corresponds to an ash hopper 1. Each side is respectively communicated with the connection cylinder 3 through the upper connecting pipe 8 and the lower connecting pipe 9. The tail gas can be transported into the ash hopper 1 through the upper connecting pipe 8 and the lower connecting pipe 9. The high temperature of the tail gas will move upward under the pressure. The high-temperature and high-pressure gas in the ash hopper 1 moves upward and flows into the central channel 2. When the gas enters the central channel 2, it will surely pass through the filter bag 11. The filter bag 11 filters out the particulate matter in the tail gas. The tail gas after passing through the filter bag 11 is the treated tail gas without particulate matter, and the particles in the tail gas contain recyclable substances.

[0060] The filter bag 11 is directly suspended in the ash hopper 1 without using a cage, which reduces the complexity of the internal structure and maximally increases the contact area between the tail gas and the filter bag 11. At the same time, during use, a connection sleeve frame 14 is provided at the lower end of the filter bag 11 and is connected with a cleaning mechanism through a linkage shaft 13, which plays a role in fixing the filter bag 11, avoiding the collision and friction of the filter bag 11, and prolonging the service life of the system and the filter bag 11;

[0061] When a large amount of dust accumulates on the surface of the filter bag 11, the filtering effect of the filter bag 11 on the tail gas is limited, the filtering efficiency of the tail gas decreases, the surface of the filter bag 11 is blocked by dust, and the tail gas continues to be introduced inward. The tail gas entering the ash hopper 1 is high-temperature and high-pressure gas. Under the action of air pressure, the opposite surface will move upward under the action of the high-temperature tail gas. The connection sleeve frame 14 at the bottom of the filter bag 11 will move upward, the connection sleeve frame 14 drives the linkage shaft 13 and the moving shaft 17 upward, the moving shaft 17 drives the moving rail 18 to move upward, and the upward movement of the moving rail 18 will push the slider 21 to slide in the fixed rail 19. Then the two scraping bars 15 approach each other under the action of the slider 21, and the scraping bars 15 scrape the surface of the dispersion cylinder 7 to clean the dust attached during the passage of the tail gas flow.

[0062] The movement of the scraping bar 15 will drive the limit block 20 in the limit groove 16. The limit groove 16 is connected to the control template. The contact of the limit block 20 with different positions of the limit groove 16 will affect the resistance of the limit groove 16 connected to the control template. The resistance affects the current. When the current changes, it indicates that there is more dust accumulated on the surface of the filter bag 11 and it needs to be treated immediately. Then the pulse jet valve installed at the upper end of the filter bag 11 will be activated to perform pulse vibration and blowing on the filter bag 11 to clean the dust on the surface of the filter bag 11, and the vibration of the filter bag 11 will also affect the linkage shaft 13 and the cleaning mechanism, and the dust attached to the surface of the cleaning mechanism can also be cleaned.

[0063] When cleaning the ash, an upper connecting pipe 8 and a lower connecting pipe 9 are connected between the connecting cylinder 3 and the dispersion cylinder 7. By setting up and down two pipes, it can avoid the limited space of a single pipe. The tail gas can enter the ash hopper 1 through the upper connecting pipe 8 and then flow back through the lower connecting pipe 9, making the tail gas flow directionally instead of randomly. This enables the dust cleaned down to move orderly, which is beneficial to the sedimentation of dust. The dust with a larger mass will gradually concentrate and fall at the lower ends of the dispersion cylinder 7 and the ash pipe 4.

[0064] During the process of waiting for the dust to concentrate, the upper ends of the respective filter bags 11 are kept in a closed state, and the ash hopper 1 at this location is in a relatively static state. After the dust has concentrated at the lower end position, the solenoid valve and the partition mechanism are opened, and the dust falls into the ash trough 10 and is conveyed downward along the lower surface of the ash trough 10. After the ash discharging is completed, the solenoid valve and the partition mechanism are closed.

[0065] A plurality of ash hoppers 1 are arranged around a single dispersion cylinder 7. When a single ash hopper 1 is being cleaned, it can be closed, and the other ash hoppers 1 can still continue to operate, without affecting either the ash cleaning or the tail gas filtration.

[0066] The overall equipment adopts a profiled sheet structure, which can effectively overcome the thermal expansion caused by high temperature. The parts in contact with the flue gas and materials are made of 304 or 316 materials to prevent metal corrosion in a high-acid environment from affecting the purity of the recovered titanium dioxide. It also adopts an anti-condensation design and a high-clean gas chamber structure, greatly reducing the air leakage of the equipment. It uses 200 - 250 mm thick multi-layer high-performance thermal insulation to ensure that the temperature drop of the equipment is always within 10°C. The ash hopper 1 adopts a star-shaped air lock valve combined with a material seal and a double-layer manhole door to ensure that the parts that need to be sealed, such as the manhole door, do not leak due to high temperature, ensuring that the air leakage rate is less than 1%. When manufacturing, the perforated holes are cut by laser, with high cutting accuracy, which is more convenient for the sealing of the filter bags 11. With a high-sealing design, less air leaks in, the oxygen content conversion is small, with a reasonable filtration air velocity and structural design, the air velocity through the filter bags 11 is low, the upward air velocity is small, the exhaust gas temperature of the filter bags 11 made of metal fiber material is high, there are almost no impurities, the waste heat recovery thermal efficiency is high, the air permeability is good, the resistance is small, the operation energy consumption is low, the recycling value is high, and it will not cause secondary pollution to the environment; it has electrical conductivity to avoid accidents caused by static electricity.

[0067] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. High temperature resistant metal fiber bag dust collector, characterized by: It comprises a centralizing channel (2), an ash hopper (1) and an ash trough (10), wherein a plurality of ash hoppers (1) are arranged below the centralizing channel (2), a hollow cavity is formed in the middle of the centralizing channel (2), a dispersion tube (7) is arranged at the position of the hollow cavity, an input pipe (5) is connected to the upper end of the dispersion tube (7), the input pipe (5) passes through the hollow cavity, a plurality of filter bags (11) are fixedly connected to the top of each of the ash hoppers (1), the ash hoppers (1) are connected to the centralizing channel (2) via the plurality of filter bags (11), the input pipe (5) is used to input untreated exhaust gas, and the centralizing channel (2) is used to centralize treated exhaust gas; One side of each connecting tube (3) is connected to the dispersion tube (7) via an upper connecting tube (8) and a lower connecting tube (9); the upper connecting tube (8) is arranged above the lower connecting tube (9); the installation angles of the upper connecting tube (8) and the lower connecting tube (9) are inclined and both are inclined toward one side of the dispersion tube (7); a cleaning mechanism is arranged on the inner wall of the dispersion tube (7); a connecting sleeve frame (14) is fixedly connected between the lower ends of the plurality of filter bags (11) in the ash hopper (1); the connecting sleeve frame (14) is connected to a linkage shaft (13); and the linkage shaft (13) is connected to the cleaning mechanism; The connecting cylinder (3) is connected to an ash pipe (4), the lower end of each ash pipe (4) and the lower end of the dispersion cylinder (7) are connected to an ash trough (10), a partition mechanism is provided at the connection point between the lower end of the dispersion cylinder (7) and the ash trough (10), and the ash trough (10) is used to transport dust; The cleaning mechanism comprises two scraping strips (15), the two scraping strips (15) are symmetrically slidably arranged on both sides of the inner wall of one side of the dispersion cylinder (7), the lower end of the linkage shaft (13) passes through the lower connecting pipe (9) and is inserted into the dispersion cylinder (7), and is fixedly connected to a moving shaft (17), and moving rails (18) are symmetrically arranged on both sides of the upper end of the moving shaft (17), and a fixed rail (19) is also arranged on the inner wall of the dispersion cylinder (7), and a slider (21) is fixedly connected to the two scraping strips (15), and the slider (21) is slidably inserted on the fixed rail (19) and the moving rail (18) at the same time; When a large amount of dust accumulates on the surface of the filter bag (11), the connecting sleeve frame (14) and the filter bag (11) are combined to form a relative surface, which floats upward under the influence of the exhaust gas transported, thereby pulling the lower connecting pipe (9) and the moving shaft (17) upward; The fixed rail (19) is arranged between the scraper strip (15) and the movable rail (18), a first slide groove is provided on the fixed rail (19), a second slide groove is provided on the movable rail (18), the movable rail (18) is arranged at an inclined angle, and the height difference between the upper end and the lower end of the movable rail (18) is the same as the diameter length of the cross section of the lower connecting pipe (9); Limiting grooves (16) are provided on one side of the upper and lower ends of the scraper bar (15); the limiting grooves (16) are fixedly connected to the inner wall of the dispersion cylinder (7); a limiting block (20) is fixedly connected to the scraper bar (15); a third sliding groove is provided on the limiting groove (16); and the limiting block (20) is slidably inserted in the third sliding groove.

2. The high temperature resistant metal fiber bag dust collector according to claim 1, characterized in that: The lower surface of the ash trough (10) is arranged to be inclined, and one side of the concentrated channel (2) is connected to an output port (6), and the output port (6) is used to output the treated exhaust gas.

3. The high temperature resistant metal fiber bag dust collector according to claim 2, characterized in that: The partition mechanism comprises two baffles (22) which are symmetrically and obliquely inserted into the dispersion cylinder (7); the upper ends of the two baffles (22) are rotatably connected to a connecting rod (23); a fixing plate (24) is fixedly connected to the outer surface of the dispersion cylinder (7); a telescopic shaft (26) is connected between the two connecting rods (23); an energized spring (25) is fixedly connected to the telescopic shaft (26); and one end of the energized spring (25) away from the telescopic shaft (26) is fixedly connected to the fixing plate (24).

4. The high temperature resistant metal fiber bag dust collector according to claim 3, characterized in that: A solenoid valve is provided at the position where the lower end of each ash pipe (4) is connected to the ash trough (10); a bag rack (12) is provided at the upper end of the ash hopper (1); the upper end of the filter bag (11) is fixedly connected to the bag rack (12); a pulse spray valve corresponding to the filter bag (11) is installed on the bag rack (12); and the filter bag (11) is made of metal fiber.

5. The high temperature resistant metal fiber bag dust collector according to claim 4, characterized in that: A control template is provided between the ash hopper (1) and the dispersion cylinder (7), the limit groove (16) and the control template are electrically connected, and the pulse injection valve and the control template are also electrically connected.

6. The high temperature resistant metal fiber bag dust collector according to claim 5, characterized in that: The dispersion cylinder (7) is formed by splicing together a plurality of side surfaces used in conjunction with the ash hopper (1).

7. The method for using the high temperature resistant metal fiber bag filter according to claim 6, characterized in that: The following steps are involved: Step S1: the tail gas generated by the titanium dioxide calcining kiln is transported to the dispersion tube (7) through the input pipe (5). The tail gas enters the dispersion tube (7) and diffuses to the connected connecting tube (3) through the upper connecting tube (8) and the lower connecting tube (9). The space of the ash hopper (1) is larger than the space of the connecting tube (3), and the tail gas finally enters the ash hopper (1); Step S2: a plurality of filter bags (11) are arranged in the ash hopper (1), and a centralized channel (2) is connected to the plurality of ash hoppers (1). Under the action of pressure, the exhaust gas will eventually pass through the filter bags (11) to filter out particulate matter therein; Step S3: the filtered tail gas continues to be transported upward and concentrated into the concentration channel (2), and the treated tail gas is finally discharged through the output port (6); Step S4: When a large amount of dust accumulates on the surface of the filter bag (11), the connecting sleeve frame (14) and the filter bag (11) are combined to form a relative surface, which floats upward under the influence of the exhaust gas transported, thereby pulling the lower connecting pipe (9) and the moving shaft (17) upward, and the cleaning mechanism takes effect, so that the two scraping strips (15) move relative to each other to clean the inner surface of the dispersion tube (7); Step S5: the scraper bar (15) in the cleaning mechanism moves, the position of the limit block (20) relative to the limit slot (16) changes, the resistance of the limit slot (16) connected to the control template changes, and the control template controls the pulse spray valve to vibrate the filter bag (11), thereby cleaning the dust on the surface of the filter bag (11); Step S6: the dust cleaned from the dispersion cylinder (7) falls and is collected at the lower end, the dust in the ash hopper (1) falls and is collected at the lower end of the ash pipe (4), the solenoid valve at the lower end of the ash pipe (4) is opened, the dust in the ash hopper (1) enters the ash trough (10), the partition mechanism is opened, and the dust in the dispersion cylinder (7) also enters the ash trough (10); Step S7: After the dust enters the ash trough (10), the solenoid valve and the isolation mechanism are closed, the dust is discharged through the ash trough (10), and the ash hopper (1) continues to process the exhaust gas.

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