High-temperature-resistant metal fiber bag type dust collector

Abstract

The invention belongs to the technical field of dust removers, and particularly relates to a high-temperature-resistant metal fiber bag type dust remover, the high-temperature-resistant metal fiber bag type dust remover comprises a centralizing channel, ash hoppers and an ash groove, a plurality of ash hoppers are arranged below the centralizing channel, a hollow cavity is formed in the middle of the centralizing channel, a dispersing barrel is arranged at the position of the hollow cavity, and a plurality of dispersing holes are formed in the dispersing barrel. The upper end of the dispersing cylinder is connected with an input pipeline, the input pipeline penetrates through the hollow cavity, the top in each dust hopper is fixedly connected with a plurality of filter bags, the dust hoppers are communicated with a centralizing channel through the filter bags, the input pipeline is used for inputting untreated tail gas, and the centralizing channel is used for centralizing treated tail gas. According to the high-temperature-resistant metal fiber bag type dust collector, the metal fiber filter bag with high temperature resistance, corrosion resistance, high strength and good wear resistance is adopted, the interception efficiency is high, the ultra-low emission requirement can be met, dust is easy to clean, and the service life is long.

Description

Technical Field

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

[0002] Dust collector is a common facility in boilers and industrial production. It transports dusty gas to the dust removal device through pipeline gas path, collects dust in the dust removal device after gas-solid separation, and the clean gas is introduced into the main pipe or directly discharged into the atmosphere. The performance of the 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, operation and maintenance costs, service life and difficulty of operation and management of the dust collector are also important factors to consider its performance.

[0003] The internal structure of the existing dust collector is complex. When dust removal is performed, dust sedimentation is likely to occur in the air intake system. At the same time, during use, the filter bag and the bag cage are installed in the dust collector as a whole. The structure is complex, and dust accumulation is serious during use. The accumulation of dust is likely to cause metal corrosion, which reduces the service life of the equipment. Summary of the invention

[0004] Based on the background technology, the existing dust collector has a complex internal structure, and during dust removal, dust settling is easily seen in the air intake system. The present invention proposes a high-temperature resistant metal fiber bag dust collector.

[0005] The high temperature resistant metal fiber bag dust collector proposed in the present invention comprises a centralized channel, an ash hopper and an ash trough, a plurality of ash 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, an input pipe is connected to the upper end of the dispersion cylinder, the input pipe passes through the hollow cavity, a plurality of filter bags are fixedly connected to the top of each ash hopper, the ash hopper is connected to the centralized channel through the plurality of filter bags, the input pipe is used to input untreated exhaust gas, and the centralized channel is used to concentrate the treated exhaust gas;

[0006] One side of each of the connecting tubes is connected to the dispersion tube through an upper connecting tube and a lower connecting tube, the upper connecting tube is arranged above the lower connecting tube, the installation angles of the upper connecting tube and the lower connecting tube are inclined and both are inclined toward one side of the dispersion tube, a cleaning mechanism is arranged on the inner wall of the dispersion tube, a connecting sleeve frame is fixedly connected between the lower ends of the plurality of filter bags in the ash hopper, the connecting sleeve frame is connected to a linkage shaft, and the linkage shaft is connected to 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 connected with the ash trough, and a partition mechanism is provided at the connection point between the lower end of the dispersion cylinder and the ash trough, and the ash trough is used to transport dust.

[0008] Preferably, the lower surface of the ash trough is inclined, and one side of the concentrated channel is connected to an output port, and the output port is used to output the treated exhaust gas.

[0009] Preferably, the partition mechanism includes two baffles which are symmetrically and obliquely inserted into the dispersion cylinder, the upper ends of the two baffles are rotatably connected to connecting rods, a fixed plate is fixedly connected to the outer surface of the dispersion cylinder, a telescopic shaft is connected between the two connecting rods, an energized spring is fixedly connected to the telescopic shaft, and the end of the energized spring away from the telescopic shaft is fixedly connected to the fixed plate.

[0010] Preferably, the cleaning mechanism includes two scraping strips, and the two scraping strips are symmetrically and slidingly 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 movable shaft. Moving rails are symmetrically arranged on both sides of the upper end of the movable shaft. A fixed rail is also arranged on the inner wall of the dispersion cylinder. Slide blocks are fixedly connected to the two scraping strips, and the slide blocks slide and penetrate the fixed rail and the movable rail at the same time.

[0011] Preferably, the fixed rail is arranged between the scraper strip and the movable rail, a first slide groove is provided on the fixed rail, a second slide groove is provided on the movable rail, the movable rail is arranged at an inclined angle, and the height difference between the upper and lower ends of the movable rail is the same as the diameter length of the cross section of the lower connecting tube.

[0012] Preferably, a limiting groove is provided on one side of the upper and lower ends of the scraper strip, the limiting groove is fixedly connected to the inner wall of the dispersion cylinder, a limiting block is fixedly connected to the scraper strip, a third slide groove is provided on the limiting groove, and the limiting block is slidably inserted in the third slide groove.

[0013] Preferably, a solenoid valve is provided at the position where the lower end of each ash pipe is connected to the ash trough, a bag rack is provided at the upper end of the ash hopper, the upper end of the filter bag is fixedly connected to the bag rack, a pulse spray valve corresponding to the filter bag is installed on the bag rack, and the filter bag is made of metal fiber.

[0014] Preferably, a control template is provided between the ash hopper and the dispersion tube, the limit groove and the control template are electrically connected, and the pulse injection valve and the control template are also electrically connected.

[0015] Preferably, the dispersion cylinder is formed by splicing a plurality of side surfaces used in conjunction with the ash hopper.

[0016] The method for using the high temperature resistant metal fiber bag dust collector includes the following steps:

[0017] Step S1: The tail gas generated by the titanium dioxide calcining kiln is transported to the dispersion cylinder through the input pipeline. The tail gas enters the dispersion cylinder and diffuses to the connected connecting cylinder through the upper connecting pipe and the lower connecting pipe. The space of the ash hopper is larger than the space of the connecting cylinder, and the tail gas will eventually enter the ash hopper;

[0018] Step S2: A plurality of filter bags are arranged in the ash hopper, and a centralized channel is connected to the plurality of ash hoppers. Under the action of pressure, the exhaust gas will eventually pass through the filter bags to filter out the particulate matter therein;

[0019] Step S3: the filtered tail gas continues to be transported upward and concentrated into the concentrated channel, and the treated tail gas is finally discharged through the output port;

[0020] Step S4: When there is a lot of dust on the surface of the filter bag, the connecting sleeve frame and the filter bag will combine to form a relative surface, which will float upward under the influence of the exhaust gas, and then the lower connecting pipe and the moving shaft will be pulled upward, and the cleaning mechanism will take effect, so that the two scrapers will move relative to each other to clean the inner surface of the dispersion cylinder;

[0021] Step S5: the scraper in the cleaning mechanism moves, the position of the limit block relative to the limit slot changes, the resistance of the limit slot connected to the control template changes, and the control template controls the pulse spray valve to vibrate the filter bag to clean the dust on the surface of the filter bag;

[0022] Step S6: The cleaned dust in the dispersion cylinder falls and gathers at the lower end, and the dust in the ash hopper falls and gathers at the lower end of the ash pipe. The solenoid valve at the lower end of the ash pipe opens, and the dust in the ash hopper enters the ash trough. The partition mechanism opens, and the dust in the dispersion cylinder also enters the ash trough.

[0023] Step S7: After the dust enters the ash chute, the solenoid valve and the partition mechanism are closed, the dust is output through the ash chute, and the ash hopper continues to process the exhaust gas.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. High temperature resistant metal fiber bag dust collector adopts high temperature resistant, corrosion resistant, high strength and good wear resistant metal fiber bag filter bag, with high interception efficiency, can meet ultra-low emission requirements, easy to clean and long service life.

[0026] 2. When using this device, the filter bag is directly hung in the ash hopper without using a bag cage, which reduces the complexity of the internal structure and maximizes the contact area between the exhaust gas and the filter bag. At the same time, during use, a connecting sleeve frame is provided at the lower end of the filter bag, which is connected to a cleaning mechanism through a linkage shaft, thereby fixing the filter bag, avoiding collision and friction of the filter bag, and extending the service life of the system and the filter bag.

[0027] 3. When using this device, when a lot of dust accumulates on the surface of the filter bag, under the action of air pressure, the opposite surface will move upward due to the action of high-temperature exhaust gas, and the connecting sleeve frame at the bottom of the filter bag will move upward. Finally, the upward movement of the movable rail will push the slider to slide in the fixed rail, and the two scrapers will approach each other under the action of the slider, and the scrapers will scrape the surface of the dispersion cylinder to clean up the dust attached during the exhaust gas circulation process, thereby achieving the effect of automatic dust cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic side view of the structure of the high temperature resistant metal fiber bag filter proposed by the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the high temperature resistant metal fiber bag filter proposed by the present invention from a bottom view;

[0030] Figure 3 A schematic diagram of the partial structure of the high temperature resistant metal fiber bag filter proposed by the present invention;

[0031] Figure 4 This is a schematic diagram of the top plan structure of the high temperature resistant metal fiber bag dust collector proposed by the present invention;

[0032] Figure 5 It is a structural schematic diagram of the partition mechanism;

[0033] Figure 6 It is a schematic diagram of the structure inside the ash hopper;

[0034] Figure 7 It is a schematic diagram of the local structure in the dispersion tube;

[0035] Figure 8 for Figure 7 A magnified view of the structure at center A;

[0036] Fig. 9 It is a schematic diagram of the structure of the cleaning mechanism;

[0037] Fig.10 Schematic diagram of the moving trajectory of the moving shaft and the scraper.

[0038] In the figure: 1 ash hopper, 2 centralized channel, 3 connecting cylinder, 4 ash pipe, 5 input pipeline, 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 scraper, 16 limit groove, 17 moving shaft, 18 moving rail, 19 fixed rail, 20 limit block, 21 slider, 22 baffle, 23 connecting rod, 24 fixed plate, 25 power spring, 26 telescopic shaft. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] Reference Figure 1-Figure 10 , a high temperature resistant metal fiber bag dust collector, comprising a centralized channel 2, an ash hopper 1 and an ash trough 10, a plurality of ash 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, an input pipe 5 is connected to the upper end of the dispersion cylinder 7, the input pipe 5 passes through the hollow cavity, a plurality of filter bags 11 are fixedly connected to the top of each ash hopper 1, the ash hopper 1 is connected to the centralized channel 2 through the plurality of filter bags 11, the input pipe 5 is used to input untreated exhaust gas, and the centralized channel 2 is used to concentrate the treated exhaust gas;

[0041] One side of each connecting tube 3 is connected to the dispersion tube 7 through 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 a 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.

[0042] 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 connected with an ash trough 10. A partition mechanism is provided at the connection between the lower end of the dispersion cylinder 7 and the ash trough 10. The ash trough 10 is used to transport dust.

[0043] The lower surface of the ash trough 10 is inclined, and one side of the concentrated channel 2 is connected to an output port 6, which is used to output the treated exhaust gas. When the exhaust gas is treated, the exhaust gas to be treated is transported to the dispersion tube 7 through the input pipe 5, and the exhaust gas in the dispersion tube 7 is transported to each ash hopper 1 through the upper connecting pipe 8 and the lower connecting pipe 9. The filter bag 11 in the ash hopper 1 filters the exhaust gas, and the filtered exhaust gas will be concentrated in the concentrated channel 2 and finally output through the output port 6.

[0044] The partition mechanism includes two baffles 22 symmetrically and obliquely inserted into the dispersion tube 7, the upper ends of the two baffles 22 are rotatably connected to the connecting rods 23, the outer surface of the dispersion tube 7 is fixedly connected to the fixing plate 24, the two connecting rods 23 are connected to the telescopic shaft 26, the telescopic shaft 26 is fixedly connected to the power-on spring 25, and the end of the power-on 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 tube 7, the partition mechanism is started, the power-on spring 25 is energized and contracted to make the telescopic shaft 26 move upward, and the upward movement of the telescopic shaft 26 will drive the connecting rod 23 and the baffle 22 to move upward, and the telescopic shaft 26 can adapt to the width change, so that the two baffles 22 can be separated, and the dust in the dispersion tube 7 will fall into the ash trough 10, and finally the dust will be output from the ash trough 10.

[0045] The cleaning mechanism includes two scraping bars 15, which are symmetrically slidably arranged on both sides of the inner wall of one side of the dispersion tube 7. The lower end of the linkage shaft 13 passes through the lower connecting pipe 9 and is inserted into the dispersion tube 7, and is fixedly connected with a moving shaft 17. The upper end of the moving shaft 17 is symmetrically provided with moving rails 18 on both sides. A fixed rail 19 is also provided on the inner wall of the dispersion tube 7. Slide blocks 21 are fixedly connected to the two scraping bars 15, and the slide blocks 21 slide and penetrate the fixed rails 19 and the moving rails 18 at the same time. When the moving shaft 17 moves up and down, the slide blocks 21 are restricted by the fixed rails 19 and the moving rails 18. When the moving shaft 17 moves, the relative position between the moving rails 18 and the fixed rails 19 will change. The intersection position of the fixed rails 19 and the moving rails 18 is the position of the slide blocks 21, so that the position of the two slide blocks 21 is changed by the movement of the moving rails 18, and then the positions of the two scraping bars 15 are changed. As the scraping bars 15 move, the inner wall of the dispersion tube 7 can be scraped.

[0046] The fixed rail 19 is arranged between the scraper bar 15 and the movable rail 18. The fixed rail 19 is provided with a first slide groove, and the movable rail 18 is provided with a second slide groove. 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 tube 9. The movable rail 18 has a vertical movement range of the diameter length of the lower connecting tube 9, and the vertical movement range of the movable shaft 17 is limited by the space inside the lower connecting tube 9. The movable rail 18 is arranged at an inclined angle, so that as the movable rail 18 moves up and down, the slider 21 can move back and forth, thereby finally achieving the movement effect of the scraper bar 15.

[0047] The scraper strip 15 is provided with a limiting groove 16 at one side of the upper and lower ends, the limiting groove 16 is fixedly connected to the inner wall of the dispersion tube 7, the scraper strip 15 is fixedly connected to a limiting block 20, the limiting groove 16 is provided with a third slide groove, and the limiting block 20 is slidably inserted in the third slide groove. The limiting block 20 moves in the third slide groove in the limiting groove 16, and the limiting groove 16 plays a role of limiting the scraper strip 15.

[0048] 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, and a pulse spray valve corresponding to the filter bag 11 is installed on the bag rack 12. The filter bag 11 is made of metal fiber. When the dust on the filter bag 11 needs to be processed, the pulse spray valve can be activated to vibrate the filter bag 11, and the dust attached to the surface can be shaken off, and the dust falls to the bottom, and the solenoid valve is opened to output the dust.

[0049] A control template is provided between the ash hopper 1 and the dispersion tube 7, the limit groove 16 is electrically connected to the control template, and the pulse injection valve is also electrically connected to the control template. The dispersion tube 7 is formed by splicing a plurality of side surfaces used in conjunction with the ash hopper 1.

[0050] A method for using a high temperature resistant metal fiber bag dust collector comprises the following steps:

[0051] 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 will eventually enter the ash hopper 1;

[0052] 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 the particulate matter therein;

[0053] Step S3: the filtered tail gas continues to be transported upward and concentrated into the concentrated channel 2, and the treated tail gas is finally discharged through the output port 6;

[0054] Step S4: When there is a lot of dust on the surface of the filter bag 11, the connecting frame 14 and the filter bag 11 will be combined to form a relative surface, which will float upward under the influence of the exhaust gas, and then the lower connecting pipe 9 and the moving shaft 17 will be pulled upward, and the cleaning mechanism will take effect, so that the two scraping strips 15 will move relative to each other to clean the inner surface of the dispersion tube 7;

[0055] 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 to clean the dust on the surface of the filter bag 11;

[0056] Step S6: The cleaned dust in the dispersion cylinder 7 falls and is concentrated at the lower end, and the dust in the ash hopper 1 falls and is concentrated at the lower end of the ash pipe 4. The solenoid 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.

[0057] Step S7: After the dust enters the ash chute 10, the solenoid valve and the partition mechanism are closed, the dust is output through the ash chute 10, and the ash hopper 1 continues to process the tail gas.

[0058] The tail gas generated by the titanium dioxide calcining kiln is transported to the dispersion tube 7 through the input pipe 5. There are multiple sides in the dispersion tube 7, each side corresponds to an ash hopper 1, and each side is connected to the connecting tube 3 through the upper connecting pipe 8 and the lower connecting pipe 9. The tail gas can be transported to 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 action of pressure. The high-temperature and high-pressure gas in the ash hopper 1 moves upward to circulate in the concentrated channel 2. The gas will inevitably pass through the filter bag 11 when entering the concentrated channel 2. 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.

[0059] The filter bag 11 is directly suspended in the ash hopper 1 without using a bag cage, which reduces the complexity of the internal structure and maximizes the contact area between the exhaust gas and the filter bag 11. At the same time, during use, a connecting sleeve frame 14 is provided at the lower end of the filter bag 11, which is connected to a cleaning mechanism through a linkage shaft 13, and plays a role in fixing the filter bag 11, avoiding collision and friction of the filter bag 11, and extending the service life of the system and the filter bag 11;

[0060] When a lot of dust accumulates on the surface of the filter bag 11, the filtering effect of the filter bag 11 on the exhaust gas is limited, and the filtering efficiency of the exhaust gas is reduced. The surface of the filter bag 11 is blocked by dust, and the exhaust gas continues to flow inward. The exhaust gas entering the ash hopper 1 is a high-temperature and high-pressure gas. Under the action of air pressure, the opposite surface will be moved upward by the high-temperature exhaust gas, and the connecting sleeve frame 14 at the bottom of the filter bag 11 will move upward. The connecting sleeve frame 14 drives the linkage shaft 13 and the moving shaft 17 upward, and the moving shaft 17 drives the moving rail 18 upward. The upward movement of the moving rail 18 will push the slider 21 to slide in the fixed rail 19, and the two scrapers 15 are close to each other under the action of the slider 21, and the scraper bar 15 scrapes the surface of the dispersion tube 7 to clean up the dust attached during the exhaust gas circulation process.

[0061] The movement of the scraper bar 15 will drive the limit block 20 in the limit slot 16, and the limit slot 16 is connected to the control template. The contact between the limit block 20 and the limit slot 16 at different positions will affect the resistance of the limit slot 16 connected to the control template. The resistance affects the current. The change in current indicates that there is a lot of dust gathered on the surface of the filter bag 11, which needs to be dealt with immediately. The pulse spray valve installed on the upper end of the filter bag 11 will be started, and the filter bag 11 will be pulse-vibrated and blown to clean the dust on the surface of the filter bag 11. 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.

[0062] When cleaning, an upper connecting pipe 8 and a lower connecting pipe 9 are connected between the connecting tube 3 and the dispersion tube 7. Two upper and lower pipes are set to avoid limited space in one pipe. The exhaust gas can enter the ash hopper 1 through the upper connecting pipe 8, and then flow back through the lower connecting pipe 9, so that the exhaust gas flows in a directional manner instead of an irregular flow, so that the cleaned dust can also move in an orderly manner, which is conducive to the sedimentation of dust. Dust with larger mass will gradually concentrate and fall on the lower end of the dispersion tube 7 and the ash pipe 4.

[0063] While waiting for the dust to gather, the upper ends of the filter bags 11 remain closed, and the ash hopper 1 there is in a relatively static state. After the dust gathers at the lower end, the solenoid valve and the partition mechanism are opened, and the dust falls into the ash trough 10 and is transported downward along the lower surface of the ash trough 10. After the ash is discharged, the solenoid valve and the partition mechanism are closed.

[0064] A plurality of ash hoppers 1 are arranged around a dispersion tube 7. When a single ash hopper 1 is to be cleaned, it can be closed, and other ash hoppers 1 can continue to be processed, and the cleaning and exhaust gas filtration will not be affected.

[0065] The whole equipment adopts corrugated plate structure, which can effectively overcome the thermal expansion caused by high temperature. The parts in contact with flue gas and materials are made of 304 or 316 materials to prevent metal corrosion in high acid environment from affecting the purity of recovered titanium dioxide. It also adopts anti-condensation design and high-clean air chamber structure to greatly reduce equipment air leakage. It adopts 200-250mm thick multi-layer high-performance insulation to ensure that the temperature drop of the equipment is always within 10℃. 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 manhole door and other parts that need to be sealed will not leak due to high temperature. To ensure that the air leakage rate is less than 1%, during the manufacturing process, the flower holes are cut by laser with high cutting accuracy, which is more convenient for the sealing of the filter bag 11. The high sealing design has less air leakage and a small oxygen content conversion. The reasonable filtering wind speed and structural design have a low wind speed through the filter bag 11 and a small rising wind speed. The exhaust gas temperature of the metal fiber filter bag 11 is high and almost free of impurities. The waste heat recovery efficiency is high, the air permeability is good, the resistance is small, the operating energy consumption is low, the recycling value is high, and it will not cause secondary pollution to the environment; the conductive performance can avoid accidents caused by static electricity.

[0066] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. High temperature resistant metal fiber bag dust collector, characterized in that: 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) through 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 the treated exhaust gas; One side of each of the connecting tubes (3) is connected to the dispersion tube (7) through 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.

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 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: 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 the two scraping strips (15) are fixedly connected to a slider (21), and the slider (21) is slidably inserted on the fixed rail (19) and the moving rail (18) at the same time.

5. The high temperature resistant metal fiber bag dust collector according to claim 4, characterized in that: 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 a height difference between an upper end and a lower end of the movable rail (18) is the same as a diameter length of a cross section of the lower connecting pipe (9).

6. The high temperature resistant metal fiber bag dust collector according to claim 5, characterized in that: 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.

7. The high temperature resistant metal fiber bag dust collector according to claim 6, 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.

8. The high temperature resistant metal fiber bag dust collector according to claim 7, characterized in that: A control template is provided between the ash hopper (1) and the dispersion tube (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.

9. The high temperature resistant metal fiber bag dust collector according to claim 8, 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).

10. The method for using the high temperature resistant metal fiber bag filter according to claim 9, 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 there is a lot of dust on the surface of the filter bag (11), the connecting sleeve frame (14) and the filter bag (11) will be combined to form a relative surface, and the relative surface will float upward under the influence of the exhaust gas transported, and then the lower connecting pipe (9) and the moving shaft (17) will be pulled upward, and the cleaning mechanism will take effect, so that the two scrapers (15) move relative to each other to treat and 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) to clean 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 tail gas.

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