A lime kiln gas purification and dust removal device

Abstract

The application discloses a lime kiln gas purification and dust removal device, which comprises a purification tank, an air inlet pipe, a conical block, a first conical filter hopper, a second conical filter hopper, an annular pipe, an atomizing nozzle, a water pump and a lifting plate. The kiln gas is evenly distributed in the purification tank through the conical block, the first conical filter hopper and the second conical filter hopper are used for two-stage filtration of dust and impurities, the sodium hydroxide solution is atomized and sprayed into the kiln gas through the atomizing nozzle, harmful gases in the kiln gas are effectively absorbed, the used sodium hydroxide solution is collected through the lifting plate and recycled, resources are saved and pollution is reduced, the solid impurities on the inner walls of the first conical filter hopper and the second conical filter hopper are scraped and cleaned through the setting of a scraping rod and an obliquely arranged rod, the lime kiln gas can be effectively purified, and the pollution to the environment is reduced.

Description

Technical Field

[0001] This invention relates to the field of lime kiln gas purification and dust removal technology, specifically to a lime kiln gas purification and dust removal device. Background Technology

[0002] Lime, as an important basic industrial raw material, has wide applications in construction, metallurgy, chemical industry and other fields. The production of lime mainly relies on lime kilns, which calcine raw materials such as limestone at high temperatures to decompose them into products such as calcium oxide (CaO). However, the production process of lime kilns generates a large amount of kiln gas, which contains high concentrations of dust, sulfur dioxide (SO2), nitrogen oxides (NOx), carbon monoxide (CO) and other harmful gases, causing serious environmental pollution. It also affects the production efficiency and equipment life of lime kilns. Existing lime kiln gas purification and dust removal devices still have many problems in terms of dust removal efficiency, purification effect, operating cost, equipment stability and ease of operation.

[0003] A Chinese patent with publication number CN118416627B includes a housing, a swirl tube, a swirl vane, a rotary joint, and an atomizing nozzle. The housing has an air inlet, an air outlet, a water inlet, and a water outlet. The swirl tube is rotatably disposed within the housing. The swirl vane is disposed within the swirl tube and is spiral-shaped. The swirl tube is connected to the air inlet via the rotary joint. The atomizing nozzle is disposed within the housing and is connected to the water inlet. The atomizing nozzle faces the opening of the swirl tube.

[0004] When the above-mentioned device is in use, the rotary joint ensures the connection between the cyclone tube and the air inlet during rotation. The inner wall of the cyclone tube is equipped with cyclone vanes, which are spiral in shape and evenly distributed along the circumference. The cyclone tube drives the cyclone vanes to rotate, thereby generating vortices in the exhaust gas and discharging it out of the cyclone tube. The atomizing nozzle on the opposite side of the cyclone tube sprays atomized water vapor, which comes into full contact with the exhaust gas discharged from the cyclone tube, thereby washing away the dust and impurities contained in the exhaust gas. However, in actual use, the wastewater that has come into contact with the kiln gas is discharged from the outlet, which wastes water resources and is likely to pollute the surrounding environment. Therefore, it is difficult to collect and recycle the wastewater.

[0005] Therefore, we propose a lime kiln gas purification and dust removal device. Summary of the Invention

[0006] The purpose of this invention is to provide a lime kiln gas purification and dust removal device, which has the advantage of collecting and recycling wastewater, and solves the problems in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a lime kiln gas purification and dust removal device, comprising a purification tank and a sodium hydroxide solution at the bottom for absorbing and purifying harmful gases in the kiln gas. One side of the purification tank is penetrated and fixedly connected to an air inlet pipe for conveying the kiln gas into the purification tank. A conical block is fixedly connected to the end of the air inlet pipe to evenly distribute the kiln gas inside the purification tank. A first conical filter bucket and a second conical filter bucket are fixedly connected to the inner wall of the purification tank near the end for separating dust and impurities in the kiln gas. The bottoms of both the first and second conical filter buckets are fixedly connected... The purification tank is fixedly connected to an annular pipe. The inner wall of each annular pipe is penetrated and fixedly connected to multiple atomizing nozzles that atomize and spray sodium hydroxide solution into the kiln gas. A water pump is fixedly connected to the outer contour of the purification tank to draw sodium hydroxide solution from the bottom of the purification tank into the annular pipe. The liquid extraction pipe of the water pump is connected to the bottom of the purification tank, and the liquid discharge pipe of the water pump is connected to the inner wall of the annular pipe. A lifting plate is movable near the bottom of the purification tank to collect the used sodium hydroxide solution. The lifting plate is equipped with a liquid discharge mechanism for recycling the collected sodium hydroxide solution.

[0008] Preferably, an L-shaped tube is connected and fixedly connected to one side of the outer contour of the purification tank near the bottom. A filter plate for filtering impurities in the used sodium hydroxide solution is fixedly connected to the inner wall of the L-shaped tube near the end. An outlet pipe for discharging the sodium hydroxide solution collected on the lifting plate into the L-shaped tube is connected and fixedly connected to the outer contour of the purification tank near the end of the L-shaped tube.

[0009] Preferably, the draining mechanism includes a second spring fixedly connected to the bottom of the lifting plate and the opposite surface of the purification tank to guide the lifting plate to reset and move. The lifting plate is provided with moving grooves at symmetrical positions on both sides. The inner walls of the moving grooves on both sides are horizontally connected with locking rods. The purification tank is provided with locking grooves at symmetrical positions on both sides near the bottom of the outlet pipe for locking the lifting plate with the locking rods.

[0010] Preferably, a lifting rod is connected to the lifting plate through which it moves up and down. A float is fixedly connected to the end of the lifting rod. On both sides of the bottom of the float, which corresponds to the moving groove, there are adjustable rods that are rotatably connected to pull the locking rods on both sides to move towards or away from each other. The end of each adjustable rod away from the float is rotatably connected to the locking rod on the adjacent side. A first spring is fixedly connected to the bottom end of the lifting rod on the opposite surface of the lifting plate to guide the float to reset.

[0011] Preferably, exhaust pipes for discharging purified kiln gas are connected and fixedly connected to both sides of the end of the purification tank at symmetrical positions, and the exhaust pipes are provided with an exhaust mechanism to guide the kiln gas to the top. The exhaust mechanism includes two exhaust pipes, each with a fixed block fixedly connected to the inner wall near the bottom. A fan blade is rotatably connected to the fixed block to guide the kiln gas inside the purification tank to the top for discharge.

[0012] Preferably, the end of the purification tank is connected to a first gear that drives the fan blades on both sides to rotate on a fixed axis, and the bottom ends of the fan blades on both sides are coaxially fixed to a second gear, and the teeth of the second gears on both sides mesh with the teeth of the first gear.

[0013] Preferably, the first and second conical filter buckets are connected by a drive shaft that is coaxially fixed to the first gear and rotates around a fixed axis. Support blocks are fixedly connected to the outer contour of the drive shaft near the ends of the first and second conical filter buckets. Multiple evenly placed scrapers are fixedly connected to the outer contour of each support block, and the scrapers are in contact with the inclined surfaces of the inner walls of the first and second conical filter buckets.

[0014] Preferably, a circular plate is fixedly connected to the outer contour of the drive shaft at the top of the second conical filter bucket. Multiple evenly placed inclined rods are fixedly connected to the outer contour of the circular plate, and the inclined rods are in contact with the surface of the second conical filter bucket. A ring is fixedly connected to the bottom of the inclined rods, and multiple evenly arranged slag discharge holes are opened near the edge of the second conical filter bucket. A through hole is opened on the side of the ring near the inclined rods to discharge the sodium hydroxide solution after use on the surface of the second conical filter bucket through the slag discharge hole to the lifting plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: I. By setting up a purification tank, air inlet pipe, conical block, first conical filter bucket, second conical filter bucket, annular pipe, atomizing nozzle, and water pump, efficient purification and dust removal of kiln gas is achieved. First, the conical block can evenly distribute the kiln gas inside the purification tank, ensuring uniform airflow distribution. Second, the first and second conical filter buckets can perform two-stage filtration of dust and impurities in the kiln gas, improving the dust removal effect. Third, the atomizing nozzle sprays sodium hydroxide solution into the kiln gas after atomization, increasing the contact area between the liquid and pollutants in the kiln gas, effectively absorbing harmful gases in the kiln gas, and further improving the purification effect.

[0016] II. Through the installation of a lifting plate, a second spring, a moving groove, a locking rod, a lifting rod, a float, an adjusting rod, and a first spring, the automatic collection and discharge of used sodium hydroxide solution is achieved. When the sodium hydroxide solution on the lifting plate accumulates to a certain level, and the lifting plate drives the locking rod to descend to the corresponding position in the locking groove, the float rises under the action of buoyancy, causing the adjusting rod to pull the locking rod into the locking groove. The locking rod then locks the position of the lifting plate, and the lifting plate is located at the bottom of the outlet pipe. Thus, the used sodium hydroxide solution on the lifting plate can be discharged into the interior of the L-shaped pipe through the outlet pipe. At the same time, the filter plate on the inner wall of the L-shaped pipe filters the used sodium hydroxide solution and discharges it to the bottom of the purification tank for recycling, improving the stability and reliability of the equipment operation and further optimizing the resource recycling process.

[0017] Third, by setting up an exhaust pipe and exhaust mechanism, including a fixed block, fan blades, a first gear, and a second gear, the efficient discharge of purified kiln gas is achieved. The fan blades rotate on a fixed axis under the drive of the first and second gears, which can guide the kiln gas inside the purification tank to the top and discharge it, avoiding the accumulation of kiln gas in the purification tank and improving the purification efficiency of the kiln gas. At the same time, it ensures the flow stability of the kiln gas in the first and second conical filter buckets, further improving the dust removal effect of the first and second conical filter buckets, making the performance of the entire purification and dust removal device more stable and reliable, and effectively ensuring the purification quality of the lime kiln gas.

[0018] IV. By installing a drive shaft, support block, scraper, circular plate, inclined rod, ring, and slag discharge hole on the first and second conical filter buckets, automatic cleaning of the inner walls of the first and second conical filter buckets is achieved. The drive shaft rotates on a fixed axis under the drive of the first gear, which in turn drives the support block and scraper to rotate. The scraper can scrape and clean the solid impurities on the inner walls of the first and second conical filter buckets, preventing the accumulation of impurities from reducing the filtration effect. At the same time, the inclined rod on the circular plate can scrape off the solid impurities and some sodium hydroxide solution on the surface of the second conical filter bucket during rotation and guide them to the ring. The solution is then discharged into the sodium hydroxide solution on the lifting plate through the through hole and slag discharge hole on the ring, avoiding clogging of the surface of the second conical filter bucket by impurities. This ensures the cleanliness of the second conical filter bucket and the stability of the dust removal effect, further improving the operating efficiency and reliability of the entire purification and dust removal device.

[0019] The combined use of the above structures solves the problem that in the actual use of existing devices, wastewater that has come into contact with exhaust gas is discharged from the outlet, resulting in waste of water resources and easy pollution to the surrounding environment, making it difficult to collect and recycle wastewater. Attached Figure Description

[0020] Figure 1This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle; Figure 4 For the present invention Figure 2 Schematic diagram of the structure at point B; Figure 5 This is a three-dimensional cross-sectional view of the part where the first conical filter bucket of the present invention is located; Figure 6 For the present invention Figure 5 Schematic diagram of the structure at point C; Figure 7 This is a three-dimensional cross-sectional view of the part where the lifting plate of the present invention is located; Figure 8 This is an exploded three-dimensional structural diagram of the part where the ring is located in this invention; Figure 9 This is a cross-sectional schematic diagram of the three-dimensional structure of the L-shaped tube of the present invention.

[0021] In the diagram: 1. Purification tank; 101. Locking groove; 2. Air inlet pipe; 3. First conical filter bucket; 4. Second conical filter bucket; 401. Slag discharge hole; 5. Annular pipe; 6. Atomizing nozzle; 7. Water pump; 8. Conical block; 9. Lifting plate; 901. Moving groove; 10. Lifting rod; 11. Float; 12. First spring; 13. Second spring; 14. Locking rod; 15. Adjusting rod; 16. L-shaped pipe; 17. Filter plate; 18. Exhaust pipe; 19. Fixing block; 20. Fan blade; 21. First gear; 22. Second gear; 23. Water outlet pipe; 24. Drive shaft; 25. Support block; 26. Scraper; 27. Circular plate; 28. Inclined rod; 29. ​​Ring; 291. Through hole. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1:

[0024] Please see Figures 1 to 9This invention provides a technical solution: a lime kiln gas purification and dust removal device, comprising a purification tank 1 and a sodium hydroxide solution at the bottom for absorbing and purifying harmful gases in the kiln gas. One side of the purification tank 1 is penetrated and fixedly connected to an air inlet pipe 2 for conveying the kiln gas into the purification tank 1. A conical block 8 is fixedly connected to the end of the air inlet pipe 2 to evenly distribute the kiln gas inside the purification tank 1. A first conical filter hopper 3 and a second conical filter hopper 4 are fixedly connected to the inner wall of the purification tank 1 near its end for separating dust and impurities in the kiln gas. The bottoms of both the first conical filter hopper 3 and the second conical filter hopper 4 are fixedly connected to rings. The inner wall of each annular tube 5 is penetrated and fixedly connected to multiple atomizing nozzles 6 that atomize and spray sodium hydroxide solution into the kiln gas. A water pump 7 is fixedly connected to the outer contour of the purification tank 1 to draw sodium hydroxide solution from the bottom of the purification tank 1 into the annular tube 5. The liquid extraction pipe on the water pump 7 is connected to the bottom of the purification tank 1, and the liquid discharge pipe on the water pump 7 is connected to the inner wall of the annular tube 5. A lifting plate 9 is connected to the inner wall of the purification tank 1 near the bottom to collect the used sodium hydroxide solution. The lifting plate 9 is equipped with a liquid discharge mechanism for recycling the collected sodium hydroxide solution.

[0025] In use, the purification tank 1 is placed on the ground to ensure its stability. The air inlet pipe 2 on the purification tank 1 is connected to the inner wall of the purification tank 1, so that the air inlet pipe 2 can deliver the kiln gas into the purification tank 1. The conical block 8 on the air inlet pipe 2 guides the kiln gas and distributes it evenly inside the purification tank 1, ensuring the uniformity of airflow distribution.

[0026] The first conical filter bucket 3 and the second conical filter bucket 4 are fixedly supported on the inner wall of the purification tank 1. The aperture of the first conical filter bucket 3 is smaller than that of the second conical filter bucket 4. With the air inlet pipe 2, the kiln gas is transported to the inner wall of the purification tank 1. The second conical filter bucket 4 can filter larger dust and impurities in the kiln gas, while smaller dust and impurities flow through the second conical filter bucket 4 to the first conical filter bucket 3. Thus, the first conical filter bucket 3 can perform secondary filtration of smaller dust and impurities in the kiln gas, thereby improving the purification effect of the kiln gas.

[0027] The annular tubes 5 installed on the first conical filter hopper 3 and the second conical filter hopper 4 can be fixedly supported at the bottom of the first conical filter hopper 3 and the second conical filter hopper 4, respectively. The atomizing nozzles 6 installed on the annular tubes 5 can be connected to the inner wall of the annular tubes 5. The water pump 7 installed on the purification tank 1 is fixedly supported on the outer contour of the purification tank 1. First, the sodium hydroxide solution is stored inside the purification tank 1. The liquid extraction pipe on the water pump 7 is connected to the inner wall at the bottom of the purification tank 1, and the liquid discharge pipe on the water pump 7 is connected to the inner wall of the two annular tubes 5. The water pump 7 is started, which draws sodium hydroxide solution from the bottom of the purification tank 1 through the suction pipe and delivers it to the inner wall of the annular pipe 5 through the discharge pipe. Then, the atomizing nozzle 6 atomizes the sodium hydroxide solution and sprays it evenly into the kiln gas. The conical block 8 guides the kiln gas and distributes it evenly inside the purification tank 1. The atomized sodium hydroxide solution forms a large number of fine liquids, which increases the contact area between the liquid and the harmful gases in the kiln gas. This allows the sodium hydroxide solution to effectively absorb acidic gases in the kiln gas, such as sulfur dioxide and hydrogen fluoride, further improving the purification effect of the kiln gas.

[0028] The lifting plate 9 installed on the purification tank 1 can move up and down within the inner wall of the purification tank 1. The sodium hydroxide solution that comes into contact with the kiln gas can fall onto the surface of the lifting plate 9 under the action of gravity, so that the lifting plate 9 can collect the used sodium hydroxide solution. The draining mechanism installed on the lifting plate 9 can discharge the collected sodium hydroxide solution to the bottom of the purification tank 1 for recycling, thereby improving the utilization rate of resources.

[0029] An L-shaped tube 16 is fixedly connected to one side of the outer contour of the purification tank 1 near the bottom. A filter plate 17 is fixedly connected to the inner wall of the L-shaped tube 16 near the end to filter impurities in the used sodium hydroxide solution. An outlet pipe 23 is fixedly connected to the outer contour of the purification tank 1 near the end of the L-shaped tube 16 to discharge the sodium hydroxide solution collected on the lifting plate 9 into the L-shaped tube 16.

[0030] In use, the L-shaped tube 16 is fixedly supported on the purification tank 1, allowing it to communicate with the inner wall at the bottom of the purification tank 1. A filter plate 17 is also fixedly supported on the inner wall of the L-shaped tube 16. A water outlet pipe 23 is connected to the inner wall of the purification tank 1, allowing the subsequent drainage mechanism to discharge the used sodium hydroxide solution to the inner wall of the L-shaped tube 16. The filter plate 17 filters solid impurities from the sodium hydroxide solution, and the filtered sodium hydroxide solution enters the bottom of the purification tank 1 through the L-shaped tube 16 for recycling, ensuring the cleanliness of the sodium hydroxide solution and maintaining its purification effect.

[0031] Example 2:

[0032] Building upon Example 1, the following is a further step: The drainage mechanism includes a second spring 13 fixedly connected to the bottom of the lifting plate 9 and the opposite surface of the purification tank 1 to guide the lifting plate 9 to move back to its original position. The lifting plate 9 has a moving groove 901 on each side at a symmetrical position. The inner wall of the moving groove 901 on both sides is horizontally connected to a locking rod 14. The purification tank 1 has a locking groove 101 on each side at a symmetrical position near the bottom of the water outlet pipe 23 for locking the lifting plate 9 with the locking rod 14.

[0033] A lifting rod 10 is connected to the lifting plate 9 and moves up and down. A float 11 is fixedly connected to the end of the lifting rod 10. On the bottom of the float 11, at the symmetrical positions on both sides corresponding to the moving groove 901, there are adjustable rods 15 that pull the locking rods 14 on both sides to move towards or away from each other. The end of each adjustable rod 15 away from the float 11 is respectively rotatably connected to the locking rod 14 on the adjacent side. A first spring 12 is fixedly connected to the bottom end of the lifting rod 10 and the opposite surface of the lifting plate 9 to guide the float 11 to reset.

[0034] In use, the second spring 13 installed on the lifting plate 9 supports the position of the lifting plate 9, such as... Figure 2As shown, in the initial state, the lifting plate 9 is located at the extreme position at the bottom of the second conical filter hopper 4 under the action of the second spring 13. As the sodium hydroxide solution on the surface of the lifting plate 9 gradually increases, the lifting plate 9 can move vertically downward under the gravity of the sodium hydroxide solution. At the same time, the second spring 13 contracts under the action of the lifting plate 9. Through the lifting rod 10 provided on the lifting plate 9, and the float 11 provided on the lifting rod 10, the lifting rod 10 can drive the float 11 to move up and down on the lifting plate 9. When the sodium hydroxide solution is higher than the float 11, the sodium hydroxide solution applies an upward buoyancy force to the float 11.

[0035] The moving groove 901 on the lifting plate 9 and the locking rod 14 on the moving groove 901 allow the locking rod 14 to move horizontally along the inner wall of the moving groove 901. The adjusting rod 15 on the float 11 allows the two ends of the adjusting rod 15 to be fixedly rotatably supported on the float 11 and the locking rod 14 on the adjacent side. The locking groove 101 on the purification tank 1 allows the lifting plate 9 to move the locking rod 14 to the corresponding position in the locking groove 101. At this time, the float 11 can pull the lifting rod 10 to move vertically upwards under its own buoyancy. The adjusting rod 15 can pull the locking rods 14 on both sides to move horizontally in opposite directions under the action of the float 11. The locking rod 14 moves and inserts into the inner wall of the locking groove 101, thereby locking the position of the lifting plate 9. The lifting plate 9 is located at the bottom of the outlet pipe 23, so that the sodium hydroxide solution used on the lifting plate 9 can be discharged into the L-shaped pipe 16 through the outlet pipe 23.

[0036] When the float 11 moves the lifting rod 10 upwards via the first spring 12 on the lifting rod 10, the first spring 12 is compressed and contracted under the action of the lifting rod 10. As the liquid level on the lifting plate 9 falls below the float 11, the first spring 12, under its own elastic force, can pull the float 11 downwards via the lifting rod 10 to reset. The adjusting rod 15 can push the locking rods 14 on both sides to reset in opposite directions. The locking rods 14 then disengage from the locking groove 101. Consequently, the second spring 13, under its own elastic force, can push the lifting plate 9 upwards to reset, thus improving the stability and reliability of the equipment operation and further optimizing the resource recycling process.

[0037] Example 3:

[0038] Building upon Example 2, the following is a further step: The purification tank 1 has exhaust pipes 18 that are symmetrically connected to both sides of the end for discharging the purified kiln gas. The exhaust pipes 18 are equipped with exhaust mechanisms that guide the kiln gas to the top. The exhaust mechanism includes two exhaust pipes 18, each with a fixed block 19 fixedly connected to the inner wall near the bottom. The fixed block 19 is rotatably connected to a fan blade 20 that guides the kiln gas inside the purification tank 1 to the top for exhaust.

[0039] The purification tank 1 is connected to a first gear 21 that drives the fan blades 20 on both sides to rotate on a fixed axis. The bottom ends of the fan blades 20 on both sides are coaxially fixed with a second gear 22, and the teeth of the second gear 22 on both sides mesh with the teeth of the first gear 21.

[0040] In use, the exhaust pipe 18, which is fixedly supported on the purification tank 1, communicates with the inner wall of the purification tank 1. A fixing block 19 on the exhaust pipe 18 is fixedly supported on its inner wall. A fan blade 20, supported by the fixing block 19, allows the fan blade 20 to rotate on a fixed axis. A first gear 21 on the purification tank 1, powered by an energized motor, drives the first gear 21 to rotate on the purification tank 1. A second gear 22 on the fan blade 20, which is connected to the first gear... The teeth on gear 21 mesh with each other, and as the first gear 21 rotates on the fixed axis on the purification tank 1, the second gear 22, under the action of the first gear 21, can synchronously drive the fan blade 20 to rotate on the fixed axis on the fixed block 19. Thus, the rotation of the fan blade 20 can guide the kiln gas inside the purification tank 1 to flow towards the top and discharge the purified and dust-removed kiln gas through the exhaust pipe 18, avoiding the accumulation of kiln gas in the purification tank 1, improving the purification efficiency of the kiln gas, and ensuring the stability of the flow of kiln gas in the first conical filter bucket 3 and the second conical filter bucket 4, improving the dust removal effect of the first conical filter bucket 3 and the second conical filter bucket 4 on the kiln gas, making the performance of the entire purification and dust removal device more stable and reliable, and effectively ensuring the purification quality of the lime kiln gas.

[0041] Example 4:

[0042] Building upon Example 3, the following is a further step: The first conical filter bucket 3 and the second conical filter bucket 4 are connected by a drive shaft 24 that is coaxially fixed to the first gear 21. Support blocks 25 are fixedly connected to the outer contour of the drive shaft 24 near the ends of the first conical filter bucket 3 and the second conical filter bucket 4. Multiple evenly placed scraper rods 26 are fixedly connected to the outer contour of each support block 25, and the scraper rods 26 are in contact with the inclined surface of the inner wall of the first conical filter bucket 3 and the second conical filter bucket 4.

[0043] A circular plate 27 is fixedly connected to the outer contour of the drive shaft 24 at the top of the second conical filter hopper 4. Multiple evenly placed inclined rods 28 are fixedly connected to the outer contour of the circular plate 27, and the inclined rods 28 are in contact with the surface of the second conical filter hopper 4. A ring 29 is fixedly connected to the bottom of the inclined rod 28. Multiple evenly arranged slag discharge holes 401 are opened near the edge of the second conical filter hopper 4. A through hole 291 is opened on the side of the ring 29 near the inclined rod 28 to discharge the sodium hydroxide solution after use on the surface of the second conical filter hopper 4 through the slag discharge hole 401 to the lifting plate 9.

[0044] In use, a drive shaft 24 is mounted on the first conical filter bucket 3 and the second conical filter bucket 4, and the drive shaft 24 is coaxially fixedly connected to the first gear 21. This allows the drive shaft 24 to rotate synchronously with the first gear 21 on the first conical filter bucket 3 and the second conical filter bucket 4. A support block 25 is mounted on the drive shaft 24, which is fixedly supported on the outer contour of the drive shaft 24. A scraper 26 mounted on the support block 25 rotates along with the drive shaft 24, causing the support block 25 to be fixedly supported on the outer contour of the drive shaft 24. Under the action of 4, the scraper 26 can rotate synchronously, and the scraper 26 is in contact with the inclined surface of the inner wall of the first conical filter 3 and the second conical filter 4. Thus, the rotation of the scraper 26 can scrape and clean the solid impurities filtered on the inner wall of the first conical filter 3 and the second conical filter 4, preventing the accumulation of impurities from reducing the filtration effect. The solid impurities scraped off the inner wall of the second conical filter 4 fall into the sodium hydroxide solution on the lifting plate 9, while the fixed impurities scraped off the inner wall of the first conical filter 3 fall onto the surface of the second conical filter 4.

[0045] The filter plate 17 is fixedly supported on the drive shaft 24 by the circular plate 27. The drive shaft 24 can drive the circular plate 27 to rotate synchronously on a fixed axis. The inclined rod 28 on the circular plate 27 is placed at an angle and is in contact with the surface of the second conical filter 4. Under the action of the circular plate 27, the inclined rod 28 can rotate and scrape off solid impurities and some sodium hydroxide solution from the surface of the second conical filter 4. The ring 29 on the inclined rod 28 can rotate synchronously with the inclined rod 28. At the same time, under the action of the inclined rod 28, the solid impurities and some sodium hydroxide solution from the surface of the second conical filter 4 can be guided to the circular plate 27. On ring 29, through the slag discharge hole 401 opened on the second conical filter bucket 4 and the through hole 291 opened on ring 29, when ring 29 drives the through hole 291 to rotate and coincide with the slag discharge hole 401, the solid impurities and sodium hydroxide solution on ring 29 fall into the sodium hydroxide solution on lifting plate 9 through the slag discharge hole 401 and the through hole 291. This avoids the solid impurities falling from the inner wall of the first conical filter bucket 3 from clogging the surface of the second conical filter bucket 4, ensuring the cleanliness of the surfaces of the first conical filter bucket 3 and the second conical filter bucket 4, so as to maintain the dust removal effect of the first conical filter bucket 3 and the second conical filter bucket 4 on the kiln gas, and further improve the operating efficiency and reliability of the entire purification and dust removal device.

[0046] Furthermore, the existing device can recycle wastewater during actual use, making it convenient to use and superior to traditional products.

[0047] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lime kiln off-gas cleaning and dust removal device, characterized by: The system includes a purification tank (1) and a sodium hydroxide solution at the bottom for absorbing and purifying harmful gases in the kiln gas. One side of the purification tank (1) is connected to an inlet pipe (2) that transports the kiln gas into the purification tank (1). The end of the inlet pipe (2) is fixedly connected to a conical block (8) that evenly distributes the kiln gas inside the purification tank (1). Near the end of the purification tank (1), the inner wall is fixedly connected to a first conical filter bucket (3) and a second conical filter bucket (4) for separating dust and impurities in the kiln gas. The bottom of both the first conical filter bucket (3) and the second conical filter bucket (4) is fixedly connected to an annular pipe (5). Each of the annular pipes (5)... The inner wall of the 5) is connected to a plurality of atomizing nozzles (6) that atomize and spray sodium hydroxide solution into the kiln gas. The outer contour of the purification tank (1) is fixedly connected to a water pump (7) that draws sodium hydroxide solution from the bottom of the purification tank (1) into the annular pipe (5). The pumping pipe on the water pump (7) is connected to the bottom of the purification tank (1), and the drain pipe on the water pump (7) is connected to the inner wall of the annular pipe (5). The inner wall of the purification tank (1) near the bottom is connected to a lifting plate (9) for collecting sodium hydroxide solution after use. The lifting plate (9) is provided with a draining mechanism for recycling the collected sodium hydroxide solution. An L-shaped tube (16) is fixedly connected to one side of the outer contour of the purification tank (1) near the bottom. A filter plate (17) for filtering impurities in the used sodium hydroxide solution is fixedly connected to the inner wall of the L-shaped tube (16) near the end. An outlet pipe (23) for discharging the sodium hydroxide solution collected on the lifting plate (9) into the L-shaped tube (16) is fixedly connected to the outer contour of the purification tank (1) near the end of the L-shaped tube (16). The draining mechanism includes a second spring (13) that is fixedly connected to the bottom of the lifting plate (9) and the opposite surface of the purification tank (1) to guide the lifting plate (9) to move back to its original position. The lifting plate (9) is provided with moving grooves (901) at symmetrical positions on both sides. The inner walls of the moving grooves (901) on both sides are horizontally connected with locking rods (14). The purification tank (1) is provided with locking grooves (101) at symmetrical positions on both sides near the bottom of the water outlet pipe (23) for locking the lifting plate (9) with the locking rods (14). A lifting rod (10) is connected to the lifting plate (9) and moves up and down. A float (11) is fixedly connected to the end of the lifting rod (10). An adjusting rod (15) is rotatably connected to the bottom of the float (11) on both sides of the moving groove (901) to pull the locking rods (14) on both sides to move towards or away from each other. The end of the adjusting rod (15) on each side away from the float (11) is rotatably connected to the locking rod (14) on the adjacent side. A first spring (12) is fixedly connected to the bottom of the lifting rod (10) on the opposite surface of the lifting plate (9) to guide the float (11) to move back.

2. The lime kiln gas purification and dust removal device according to claim 1, characterized in that: The purification tank (1) has exhaust pipes (18) that are symmetrically connected to both sides of the end for discharging the purified kiln gas. The exhaust pipes (18) are equipped with exhaust mechanisms that guide the kiln gas to the top. The exhaust mechanism includes two exhaust pipes (18) with fixed blocks (19) fixedly connected to the inner walls near the bottom. The fixed blocks (19) are connected to fan blades (20) that guide the kiln gas inside the purification tank (1) to the top for discharge.

3. The lime kiln gas purification and dust removal device according to claim 2, characterized in that: The purification tank (1) is connected to a first gear (21) that drives the fan blades (20) on both sides to rotate on a fixed axis. The bottom ends of the fan blades (20) on both sides are coaxially fixed with a second gear (22). The second gears (22) on both sides mesh with the teeth of the first gear (21).

4. The lime kiln gas purification and dust removal device according to claim 3, characterized in that: The first conical filter bucket (3) and the second conical filter bucket (4) are connected by a drive shaft (24) that is coaxially fixed to the first gear (21). Support blocks (25) are fixedly connected to the outer contour of the drive shaft (24) near the ends of the first conical filter bucket (3) and the second conical filter bucket (4). Multiple uniformly placed scrapers (26) are fixedly connected to the outer contour of each support block (25), and the scrapers (26) are in contact with the inclined surfaces of the inner walls of the first conical filter bucket (3) and the second conical filter bucket (4).

5. The lime kiln gas purification and dust removal device according to claim 4, characterized in that: A circular plate (27) is fixedly connected to the outer contour of the drive shaft (24) at the top of the second conical filter bucket (4). Multiple evenly placed inclined rods (28) are fixedly connected to the outer contour of the circular plate (27), and the inclined rods (28) are in contact with the surface of the second conical filter bucket (4). A ring (29) is fixedly connected to the bottom of the inclined rod (28), and multiple evenly arranged slag discharge holes (401) are opened near the edge of the second conical filter bucket (4). A through hole (291) is opened on the side of the ring (29) near the inclined rod (28) to discharge the sodium hydroxide solution after the surface of the second conical filter bucket (4) through the slag discharge hole (401) to the lifting plate (9).

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