Cement production line gas recycling system with dechlorination function

Abstract

The invention relates to the technical field of dechlorination systems, in particular to a cement production line gas recycling system with a dechlorination function, which comprises a gas suction device, a shock cooling device, an upper transverse pipe, a vertical pipe and a lower transverse pipe, a middle pipe with the top face closed and the lower end penetrating through the inner pipe is fixedly arranged at the vertical axis of the inner pipe, a limiting iron ring is fixedly arranged on the lower portion of the inner side of the middle pipe, a magnet piece is matched above the limiting iron ring, and the bottom face of the magnet piece is fixedly connected with a rubber plug for sealing the limiting iron ring. The inner diameter of the limiting iron ring is consistent with the outer diameter of the cleaning pipe, and the cleaning pipe is located under the limiting iron ring. Recycling of potassium chloride potassium salt is achieved, a heat source is provided by smoke, meanwhile, after filtering is completed, the inner pipe is taken down, cleaned clinker in the inner pipe is poured into the drying chamber to be dried, and recycling of the clinker is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of dechlorination systems, and specifically relates to a gas recovery and utilization system for a cement production line with dechlorination function. Background Art Raw materials such as limestone, sandstone, shale, and iron ore are mixed and ground in a certain proportion and then calcined at high temperature to produce cement clinker. Since limestone, sandstone, shale, iron ore and other raw materials all come from nature and contain different proportions of chloride ions, which will be solidified in the clinker during the calcination process. However, chloride ions are strong acid radicals and have strong corrosiveness. During the production of reinforced concrete, they are likely to react with steel bars and alkaline substances generated by the hydration of clinker, affecting the temperature resistance of concrete and thus the service safety of the entire building.

[0002] Therefore, during the production of cement clinker, the chloride ion content needs to be strictly controlled, generally controlled below 0.06%. If it exceeds, problems such as serious system scaling and unqualified clinker quality will occur. Therefore, a dechlorination system needs to be set up during the clinker production process to discharge chloride ions from the firing system.

[0003] The existing dechlorination system is to set an air intake on the kiln tail smoke chamber and use an air suction device to suck out part of the flue gas, so as to discharge the chlorine mixed in the flue gas. However, when dechlorinating in this way, the chlorine ash in the flue gas will also be discharged together. Since the flue gas also contains a certain amount of potassium chloride and the dust is chlorine ash, and the flue gas also has a certain temperature when discharged for the clinker to be recycled again, to a certain extent, it causes waste of potassium, heat and clinker. Summary of the Invention The invention provides a gas recovery and utilization system for a cement production line with dechlorination function to solve the defects in the prior art.

[0004] The invention is realized through the following technical solutions: A gas recovery and utilization system for a cement production line with a chlorine removal function. Among them, an air intake port is arranged in the kiln tail smoke chamber, an air suction device is arranged at the air intake port, the air outlet end of the air suction device is communicated with a quenching device, the air outlet end of the quenching device is communicated with an upper horizontal pipe, vertical pipes are communicated on both sides of the upper horizontal pipe, the lower ends of the two vertical pipes are communicated through a lower horizontal pipe, the lower horizontal pipe is vertically communicated with an air outlet main pipe, the lower end of the air outlet main pipe is closed and communicated with a first branch pipe and a second branch pipe, the first branch pipe is communicated with the hot gas intake end of an evaporation crystallizer, the second branch pipe is communicated with the intake end of a drying device, and the vertical pipes are controlled by electromagnetic valves; an inner pipe is coaxially arranged in the vertical pipe, a through hole is opened on the lower end surface of the vertical pipe, the lower end of the inner pipe is slidably sealed with the through hole and the lower end of the inner pipe is closed, air outlet holes are opened in the inner pipe and the inner wall of the inner pipe is wrapped with a dust removal cloth, an iron sheet is fixedly connected to the upper end edge of the inner pipe, and an electromagnet capable of adsorbing the iron sheet is fixedly arranged in the vertical pipe; a cleaning tank is fixedly arranged below the vertical pipe, a liquid storage chamber is communicated with the lower part of the cleaning tank, the liquid storage chamber is communicated with the evaporation chamber of the evaporation crystallizer through a connecting pipe, a valve is arranged on the connecting pipe, a cleaning pipe is vertically and fixedly arranged in the cleaning tank, an external water outlet hole is opened on the cleaning pipe, the cleaning pipe is communicated with a water source through a water inlet pipe and is controlled by a control device to spray water, a middle pipe with a closed top surface and a lower end passing through the inner pipe is fixedly arranged at the vertical axis of the inner pipe, a limiting iron ring is fixedly arranged at the lower part of the inner side of the middle pipe, a magnet sheet is adapted above the limiting iron ring, a rubber plug for sealing and limiting the iron ring is fixedly connected to the bottom surface of the magnet sheet, the inner diameter of the limiting iron ring is the same as the outer diameter of the cleaning pipe and the cleaning pipe is located directly below the limiting iron ring.

[0005] When the present application is in use, the flue gas in the smoke chamber at the tail of the kiln is extracted and passes through a quenching device, and the temperature is reduced to about 400 degrees. After the temperature is reduced, the chloride ions crystallize and attach to the chlorine ash and enter the upper horizontal pipe with the flue gas, and then enter the corresponding vertical pipe through the upper horizontal pipe. After entering the vertical pipe, the chlorine ash is filtered by the dust removal cloth in the inner pipe, and the flue gas enters the lower horizontal pipe through the vertical pipe, and enters the first branch pipe and the second branch pipe respectively through the lower horizontal pipe and the exhaust main pipe. The flue gas in the first branch pipe and the second branch pipe can provide heat support for the evaporator crystallizer and the drying device respectively, thereby realizing the rational use of heat in the flue gas; and after the dust removal cloth collects the chlorine ash for a period of time, it first closes the solenoid valve on the corresponding side and opens the solenoid valve on the other side, and then closes the solenoid valve on the other side. The electromagnet on this side, the inner tube slides out of the vertical tube from the through hole under the action of gravity and falls vertically under the limit of the through hole, so that the cleaning tube is inserted into the middle tube, and then the control device is used to make the cleaning tube spray water from the external water hole and make the water enter the middle tube through the dust removal cloth to clean the chlorine ash in the middle tube. During the cleaning, the potassium chloride on the chlorine ash merges with water to form a potassium chloride solution, and the solution enters the liquid storage chamber. When necessary, the corresponding valve is opened to allow the liquid to enter the evaporation crystallizer, and the evaporation crystallization is potassium chloride crystals to realize the recovery of potassium salt, and the heat source is provided by the flue gas. At the same time, after the filtration is completed, the inner tube is removed, and the cleaned clinker inside is poured into the drying chamber for drying to realize the recycling of clinker. Among them, the cooperation of the limit iron ring, the magnet sheet and the rubber plug can realize the sealing of the middle tube and when the inner tube falls, it leaves the position under the push of the cleaning tube, and when the inner tube moves upward, it can return to its position under the action of gravity.

[0006] Preferably, the control device comprises an inner water inlet pipe with a closed top surface and an inner sliding seal in the cleaning pipe, the top surface of the inner water inlet pipe is fixedly connected to the inner wall of the top surface of the cleaning pipe by a spring, the inner water inlet pipe passes through the cleaning tank and is connected to an external water source, the inner wall of the top surface of the cleaning pipe and the top surface of the inner water inlet pipe are fixedly connected by a spring, and the inner water outlet holes which can be staggered with the outer water hole are respectively opened on the side of the inner water inlet pipe, and when the spring is compressed, the outer water hole is connected with the inner water outlet hole. The dropped inner pipe presses down the cleaning pipe under the action of gravity, and the cleaning pipe slides downward under the action of pressure and makes the outer water hole opposite to the inner water outlet hole, so that the water in the inner water inlet pipe is sprayed out through the inner water outlet hole and the outer water hole, and because the water discharge is achieved by gravity, automatic water discharge and spraying can be achieved, and when the inner pipe is pulled out upward, the spring pushes the cleaning pipe upward, so that the outer water hole and the inner water outlet hole are staggered.

[0007] Preferably, the lower end of the vertical pipe is closed by a circular plate. The circular plate is provided with a circular hole. An inner plate is rotatably connected in the circular hole through a sealing bearing. A through hole is provided on the inner plate. A horizontal shaft is fixedly arranged in the vertical pipe. A through hole is provided on the horizontal shaft. A first rotating shaft is rotatably connected to the through hole through a bearing. A first fan blade is arranged on the first rotating shaft. An inner ring is fixedly arranged in the vertical pipe. The inner ring is rotatably connected to the upper pipe through a bearing. The electromagnet is fixedly arranged on the bottom surface of the upper pipe. The upper pipe and the inner pipe communicate vertically. The upper end of the upper pipe is coaxial with and fixedly connected to the first rotating shaft. When the gas flows, the first fan blade drives the rotation of the first rotating shaft. The rotation of the first rotating shaft drives the rotation of the upper pipe. The rotation of the upper pipe can realize the rotation of the inner pipe, so that the dust removal cloth in the inner pipe can filter the chlorine ash more evenly, avoiding the accumulation of chlorine ash in one position of the dust removal cloth, resulting in a poor later filtering effect. Among them, the inner plate is rotatably connected to the circular plate, and the sliding seal with the inner pipe can be realized through the inner plate. At the same time, the rotation of the inner pipe is satisfied through the rotatable connection. Preferably, a card slot is vertically opened in the lower part of the inner wall of the cleaning pipe. A clamping block is slidably matched in the card slot. The clamping block is fixedly connected to the inner water inlet pipe. The lower end of the inner water inlet pipe passes through the cleaning tank and is coaxially and rotatably connected to the upper end of the water inlet pipe through a sealing bearing. A second rotating shaft fixedly connected to the inner water inlet pipe is coaxially arranged in the water inlet pipe. A rotating paddle is sleeved on the second rotating shaft. An iron ring gasket is fixedly arranged on the bottom surface of the middle pipe. A circular through slot is opened on the bottom surface of the cleaning chamber. An inner magnet plate is rotatably connected in the circular through slot through a sealing bearing. The inner water inlet pipe passes through the inner magnet plate and is rotatably connected to the inner magnet plate through a sealing bearing. The bottom surface of the inner magnet plate is fixedly connected to an outer pipe. The inner water inlet pipe is coaxial with the outer pipe and passes through the outer pipe. The outer pipe is driven to rotate by a rotating device, and the rotation direction is opposite to that of the inner water inlet pipe. A rotating shaft is vertically connected upward at the center of the top surface of the cleaning pipe. The rotating shaft is sleeved with a rotating support plate through a bearing. When the cleaning water sprays out, it will flow in the water inlet pipe, thus driving the rotation of the rotating paddle. The rotation of the rotating paddle drives the rotation of the second rotating shaft. The rotation of the second rotating shaft drives the rotation of the inner water inlet pipe. The rotation of the inner water inlet pipe drives the synchronous rotation of the cleaning pipe through the cooperation of the clamping block and the card slot, so as to realize uniform water spraying, and then rinse the dust removal cloth more cleanly. The rotating device drives the rotation of the outer pipe, so as to drive the rotation of the inner magnet plate through the rotation of the outer pipe. The rotation of the inner magnet plate drives the rotation of the inner pipe, and the rotation direction of the inner pipe is opposite to that of the cleaning pipe, so as to achieve a better rinsing effect. At the same time, the rotation of the inner pipe can achieve the effect of dehydration, and better throw the water out of the inner pipe.

[0008] Preferably, the rotating device includes a third rotating shaft coaxially arranged in the main gas outlet pipe. A second fan blade is sleeved on the third rotating shaft, and a first driving bevel gear is also sleeved on the second rotating shaft. A horizontal shaft is transversely arranged in the main gas outlet pipe. Both ends of the horizontal shaft penetrate through the main gas outlet pipe and are rotatably connected to the outside of the main gas outlet pipe through sealed bearings. A first driven bevel gear meshing with the first driving bevel gear is sleeved on the horizontal shaft. A second driving bevel gear is sleeved on the outer end of the horizontal shaft. A cross plate is further arranged on the side of the cleaning tank. A vertical shaft is rotatably connected to the cross plate through a bearing. A driving sprocket and a second driven bevel gear meshing with the second driving bevel gear are sleeved on the vertical shaft. A driven sprocket is sleeved on the outer pipe. The driving sprocket and the driven sprocket are driven by a chain. When the gas flows in the main gas outlet pipe, it drives the rotation of the second fan blade. The rotation of the second fan blade drives the rotation of the third rotating shaft. The rotation of the third rotating shaft drives the rotation of the first driving bevel gear. The rotation of the first driving bevel gear drives the rotation of the first driven bevel gear. The rotation of the first driven bevel gear drives the rotation of the horizontal shaft. The rotation of the horizontal shaft drives the rotation of the second driving bevel gear, and then drives the rotation of the second driven bevel gear. The rotation of the second driven bevel gear drives the rotation of the vertical shaft. The rotation of the vertical shaft drives the rotation of the driving sprocket. The rotation of the driving sprocket drives the rotation of the driven sprocket, and then drives the rotation of the outer pipe, so as to realize driving the rotation of the inner pipe by using the flue gas power as the power source.

[0009] Preferably, the connecting pipe includes a branch connecting pipe and a main connecting pipe. The branch connecting pipe is communicated with the corresponding cleaning tank. The branch connecting pipes are all communicated with the main connecting pipe, and the main connecting pipe is inclined downward in the direction of the liquid storage chamber. The inclined downward main connecting pipe can ensure that the water flows down better.

[0010] The beneficial effects of the present invention are as follows: By using this application, the chlorine ash containing potassium chloride in the flue gas can be filtered out by the dust removal cloth, and potassium chloride solution can be generated by using water, realizing the recovery of potassium salts. The heat source is provided by the flue gas. After the filtration is completed, the inner pipe is removed, and the cleaned chlorine ash clinker inside is poured into the drying chamber for drying, realizing the recycling of the clinker. At the same time, the flow of the flue gas and the flow of water can be used as power, so that the inner pipe and the cleaning pipe rotate in the opposite direction, which not only meets the backwashing of the dust removal cloth, but also has higher cleaning efficiency. And through the rotation of the inner pipe, the water in the inner pipe can be thrown out. Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0012] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 is the partial enlarged view of I; Figure 3 is Figure 1 the partial enlarged view of II of; Figure 4 is Figure 1 the partial enlarged view of III of; Figure 5 is Figure 1 the partial enlarged view of IV of.

[0013] As shown in the figure: 1. Upper horizontal pipe, 2. Vertical pipe, 3. Lower horizontal pipe, 4. First branch pipe, 5. Second branch pipe, 6. Evaporation crystallizer, 7. Drying device, 8. Inner pipe, 9. Electromagnet, 10. Cleaning tank, 11. Liquid storage chamber, 12. Cleaning pipe, 13. Outer water outlet hole, 14. Inner water inlet pipe, 15. Inner water outlet hole, 16. Intermediate pipe, 17. Limit iron ring, 18. Spring, 19. Inner plate, 20. First rotating shaft, 21. First fan blade, 22. Upper pipe, 23. Second rotating shaft, 24. Rotating paddle, 25. Inner magnet plate, 26. Outer pipe, 27. Third rotating shaft, 28. Second fan blade, 29. First driving bevel gear, 30. First driven bevel gear, 31. Second driving bevel gear, 32. Second driven bevel gear, 33. Driving sprocket, 34. Driven sprocket, 35. Branch connecting pipe, 36. Main connecting pipe, 37. Quenching device. Specific embodiments

[0014] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0015] A gas recovery and utilization system for a cement production line with a chlorine removal function, such as Figures 1 - 5As shown in the figure. Among them, an air intake is provided in the tail gas chamber of the kiln. An air suction device is provided at the air intake. The air outlet end of the air suction device is connected to the quenching device 37. The air outlet end of the quenching device 37 is connected to the upper horizontal pipe 1. Both sides of the upper horizontal pipe 1 are connected with vertical pipes 2. The lower ends of the two vertical pipes 2 are connected through a lower horizontal pipe 3. The lower horizontal pipe 3 is vertically connected with an air outlet main pipe. The lower end of the air outlet main pipe is closed and connected with a first branch pipe 4 and a second branch pipe 5. The first branch pipe 4 is connected to the hot air intake end of the evaporation crystallizer 6. The second branch pipe 5 is connected to the intake end of the drying device 7. The vertical pipes 2 are controlled by electromagnetic valves; an inner pipe 8 is coaxially arranged in the vertical pipe 2. A through hole is opened on the lower end surface of the vertical pipe 2. The lower end of the inner pipe 8 is slidably sealed with the through hole and the lower end of the inner pipe 8 is closed. The inner pipe 8 is provided with air outlet holes and the inner wall of the inner pipe 8 is wrapped with a dust removal cloth. An iron sheet is fixedly connected to the upper edge of the inner pipe 8. An electromagnet 9 capable of adsorbing the iron sheet is fixedly arranged in the vertical pipe 2. The electromagnet 9 is of an annular structure; a cleaning tank 10 is fixedly arranged below the vertical pipe 2. The lower part of the cleaning tank 10 is connected with a liquid storage chamber 11. The liquid storage chamber 11 is connected to the evaporation chamber of the evaporation crystallizer 6 through a connecting pipe. A valve is arranged on the connecting pipe. A cleaning pipe 12 is vertically and fixedly arranged in the cleaning tank 10. External water outlet holes 13 are opened on the cleaning pipe 12. The cleaning pipe 12 is connected to a water source through a water inlet pipe and is controlled by a control device to spray water. A middle pipe 16 with a closed top and a lower end passing through the inner pipe 8 is fixedly arranged at the vertical axis of the inner pipe 8. A limiting iron ring 17 is fixedly arranged at the lower part inside the middle pipe 16. A magnet sheet is adapted above the limiting iron ring 17. A rubber plug for sealing and limiting the iron ring 17 is fixedly connected to the bottom surface of the magnet sheet. The inner diameter of the limiting iron ring 17 is the same as the outer diameter of the cleaning pipe 12 and the cleaning pipe 12 is located directly below the limiting iron ring 17.

[0016] Among them, the evaporation crystallizer 6 and the drying device 7 are both prior arts, so their principles will not be described in detail.

[0017] The control device includes an inner water inlet pipe 14 with a closed top and slidably sealed inside the cleaning pipe 12. The top surface of the inner water inlet pipe 14 is fixedly connected to the inner wall of the top surface of the cleaning pipe 12 through a spring 18. The inner water inlet pipe 14 passes through the cleaning tank 10 and is connected to an external water source. The inner wall of the top surface of the cleaning pipe 12 and the top surface of the inner water inlet pipe 14 are fixedly connected through a spring 18. Inner water outlet holes 15 that can be misaligned with the external water outlet holes 13 are respectively opened on the side surface of the inner water inlet pipe 14. When the spring 18 is compressed, the external water outlet holes 13 communicate with the inner water outlet holes 15.

[0018] The lower end of the vertical pipe 2 is closed by a circular plate. A round hole is provided on the circular plate. An inner plate 19 is rotatably connected in the round hole through a sealed bearing. The through hole is arranged on the inner plate 19. A horizontal shaft is fixedly arranged in the vertical pipe 2. A through hole is provided on the horizontal shaft. The through hole is rotatably connected to a first rotating shaft 20 through a bearing. A first fan blade 21 is arranged on the first rotating shaft 20. An inner ring is fixedly arranged in the vertical pipe. The inner ring is rotatably connected to the upper pipe through a bearing. The electromagnet 9 is fixedly arranged on the bottom surface of the upper pipe 22. The upper pipe 22 and the inner pipe communicate vertically. The upper end of the upper pipe 22 is coaxial with and fixedly connected to the first rotating shaft 20. Specifically, a horizontal rod is fixedly arranged at the upper end of the inner pipe, and the first rotating shaft is vertically connected to the horizontal rod.

[0019] A clamping groove is vertically opened in the lower part of the inner wall of the cleaning pipe 12. A clamping block is slidably fitted in the clamping groove. The clamping block is fixedly connected to the inner water inlet pipe 14. The lower end of the inner water inlet pipe 14 passes through the cleaning tank 10 and is coaxially and rotatably connected to the upper end of the water inlet pipe through a sealed bearing. A second rotating shaft 23 fixedly connected to the inner water inlet pipe 14 is coaxially arranged in the water inlet pipe. A rotating paddle 24 is sleeved on the second rotating shaft 23. An iron ring gasket is fixedly arranged on the bottom surface of the middle pipe 16. A circular through groove is opened on the bottom surface of the cleaning chamber. An inner magnet plate 25 is rotatably connected in the circular through groove through a sealed bearing. The inner water inlet pipe 14 passes through the inner magnet plate 25 and is rotatably connected to the inner magnet plate 25 through a sealed bearing. The bottom surface of the inner magnet plate 25 is fixedly connected to an outer pipe 26. The inner water inlet pipe 14 is coaxial with the outer pipe 26 and passes through the outer pipe 26. The outer pipe 26 is driven to rotate by a rotating device and the rotation direction is opposite to the rotation direction of the inner water inlet pipe 14. A rotating shaft is vertically connected upward at the center of the top surface of the cleaning pipe 12. The rotating shaft is sleeved with a rotating support plate through a bearing. The rotating support plate not only plays a role, but also reduces the friction between the inner pipe 8 and the cleaning pipe 12.

[0020] The rotating device includes a third rotating shaft 27 coaxially arranged in the total air outlet pipe. A second fan blade 28 is sleeved on the third rotating shaft 27. A first driving bevel gear 29 is also sleeved on the second rotating shaft 23. A horizontal shaft is transversely arranged in the total air outlet pipe. Both ends of the horizontal shaft pass through the total air outlet pipe and the passing parts are rotatably connected to the total air outlet pipe through sealed bearings. A first driven bevel gear 30 meshing with the first driving bevel gear 29 is sleeved on the horizontal shaft. A second driving bevel gear 31 is sleeved on the outer end of the horizontal shaft. A cross plate is also arranged on the side of the cleaning tank 10. A vertical shaft is rotatably connected to the cross plate through a bearing. A driving sprocket 33 and a second driven bevel gear 32 meshing with the second driving bevel gear 31 are sleeved on the vertical shaft. A driven sprocket 34 is sleeved on the outer pipe 26. The driving sprocket 33 and the driven sprocket 34 are driven by a chain.

[0021] When the present application is in use, the flue gas in the smoke chamber at the tail of the kiln is extracted and passes through the quenching device 37, and the temperature is reduced to about 400 degrees. After the temperature is reduced, the chloride ions crystallize and attach to the chlorine ash and enter the upper horizontal pipe 1 with the flue gas, and then enter the corresponding vertical pipe 2 through the upper horizontal pipe 1. After entering the vertical pipe 2, the chlorine ash is filtered by the dust removal cloth in the inner pipe 8, and the flue gas enters the lower horizontal pipe 3 through the vertical pipe 2, and enters the first branch pipe 4 and the second branch pipe 5 through the lower horizontal pipe 3 and the exhaust main pipe, respectively. The flue gas in the first branch pipe 4 and the second branch pipe 5 can provide heat support for the evaporation crystallizer 6 and the drying device 7, respectively, so as to realize the reasonable utilization of the heat in the flue gas; and after collecting the chlorine ash for a period of time, the dust removal cloth first closes the corresponding side. The electromagnetic valve opens the electromagnetic valve on the other side, and then closes the electromagnet 9 on that side. The inner tube 8 slides out of the vertical pipe 2 from the through hole under the action of gravity and falls vertically downward under the limit of the through hole, so that the cleaning pipe 12 is inserted into the middle tube 16. The fallen inner tube 8 presses the cleaning pipe 12 downward under the action of gravity. The cleaning pipe 12 slides downward under the action of pressure and makes the outgoing water hole 13 opposite to the inner water outlet hole 15, so that the water in the inner water inlet pipe 14 is sprayed out through the inner water outlet hole 15 and the outgoing water hole 13. Since the water outlet is realized by gravity, automatic water outlet and spraying can be realized. When the inner tube 8 is pulled out upward, the spring 18 pushes the cleaning pipe 12 upward, so that the outgoing water hole 13 and the inner water outlet hole 15 are staggered.

[0022] Among them, because water enters the middle tube 16 through the dust removal cloth, the chlorine ash in the middle tube 16 is cleaned, and when cleaning, the potassium chloride on the chlorine ash merges with water to form a potassium chloride solution, and the solution enters the liquid storage chamber 11, and the corresponding valve is opened when necessary, so that the liquid enters the evaporation crystallizer 6, and the evaporation crystallization is potassium chloride crystal, so as to realize the recovery of potassium salt, and the heat source is provided by the flue gas. At the same time, after the filtration is completed, the inner tube 8 is removed, and the cleaned clinker inside is poured into the drying chamber for drying, so as to realize the recycling of the chlorine ash clinker. Among them, the cooperation of the limit iron ring 17 and the magnet sheet and the rubber plug can realize the sealing of the middle tube 16, and when the inner tube 8 falls, it leaves the position under the push of the cleaning pipe 12, and when the inner tube 8 is moved upward, it can return to its position under the action of gravity. When cleaning, since the direction of the cleaning water entering the inner tube 8 is opposite to the filtering direction of the dust removal cloth, it can realize the backwashing of the chlorine ash on the dust removal cloth, so as to realize better cleaning of the dust removal cloth.

[0023] Among them, the first fan blade 21 drives the rotation of the first rotating shaft 20 when the gas flows, and the rotation of the first rotating shaft 20 drives the rotation of the first magnet block 22, and then drives the second magnet block to rotate, thereby realizing the rotation of the inner tube 8, so that the dust cloth in the inner tube 8 can filter the chlorine ash more evenly, and avoid the accumulation of chlorine ash in one position in the dust cloth, resulting in poor filtering effect in the later stage. Among them, the inner plate is rotatably connected to the circular plate, and a sliding seal with the inner tube 8 can be achieved through the inner plate, and the rotation of the inner tube 8 is satisfied through the rotating connection. When the inner pipe 8 lands on the cleaning pipe 12, the cleaning water will flow in the water inlet pipe when spraying, thereby driving the rotation of the rotating paddle 24. The rotation of the rotating paddle 24 drives the rotation of the second rotating shaft 23. The rotation of the second rotating shaft 23 drives the rotation of the inner water inlet pipe 14. The rotation of the inner water inlet pipe 14 drives the cleaning pipe 12 to rotate synchronously through the cooperation of the clamping block and the clamping groove, so as to realize uniform water spraying, and then rinse the dust removal cloth more cleanly. The rotating device drives the rotation of the outer pipe 26, so that the rotation of the outer pipe 26 drives the rotation of the inner magnet plate 25. The rotation of the inner magnet plate 25 drives the rotation of the inner pipe 8 and the inner pipe 8 rotates in the opposite direction to the cleaning pipe 12, so as to achieve a better flushing effect. At the same time, the rotation of the inner pipe 8 can achieve the effect of dehydration, and better throw the water out of the inner pipe 8.

[0024] At the same time, when the gas flows in the main gas outlet pipe, it drives the rotation of the second fan blade 28. The rotation of the second fan blade 28 drives the rotation of the third rotating shaft 27. The rotation of the third rotating shaft 27 drives the rotation of the first driving bevel gear 29. The rotation of the first driving bevel gear 29 drives the rotation of the first driven bevel gear 30. The rotation of the first driven bevel gear 30 drives the rotation of the horizontal shaft. The rotation of the horizontal shaft drives the rotation of the second driving bevel gear 31, and then drives the rotation of the second driven bevel gear 32. The rotation of the second driven bevel gear 32 drives the rotation of the vertical shaft. The rotation of the vertical shaft drives the rotation of the driving sprocket 33. The rotation of the driving sprocket 33 drives the rotation of the driven sprocket 34, and then drives the rotation of the outer pipe 26, so as to realize driving the rotation of the inner pipe 8 by using the flue gas power as the power source.

[0025] The connecting pipe includes a branch connecting pipe 35 and a main connecting pipe 36. The branch connecting pipe 35 is communicated with the corresponding cleaning tank 10, and the branch connecting pipes 35 are all communicated with the main connecting pipe 36 and the main connecting pipe 36 is inclined downward in the direction of the liquid storage chamber 11. The inclined downward of the main connecting pipe 36 can ensure that the water can flow down better.

[0026] The use of this application can filter out the chlorine ash containing potassium chloride in the flue gas by using the dust removal cloth, and generate potassium chloride solution by using water, and recycle the potassium salt. The heat source is provided by the flue gas. After the filtration is completed, the inner pipe 8 is removed, and the cleaned chlorine ash clinker inside is poured into the drying chamber for drying to realize the recycling of the clinker. At the same time, the flow of the flue gas and the flow of water can be used as power, so that the inner pipe 8 and the cleaning pipe 12 rotate in opposite directions, which not only satisfies the backwashing of the dust removal cloth, but also has higher cleaning efficiency, and through the rotation of the inner pipe 8, the water in the inner pipe 8 is thrown out. At the same time, the hot gas in this application does not contact the water, which can ensure that the hot gas maintains its heat as much as possible and realizes better heating.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas recovery and utilization system for a cement production line with a chlorine removal function, characterized in that: An air intake port is provided in the kiln tail smoke chamber. An air suction device is provided at the air intake port. The outlet end of the air suction device is communicated with a quenching device. The outlet end of the quenching device is communicated with an upper horizontal pipe. Vertical pipes are communicated on both sides of the upper horizontal pipe. The lower ends of the two vertical pipes are communicated through a lower horizontal pipe. The lower horizontal pipe is vertically communicated with an outlet main pipe. The lower end of the outlet main pipe is closed and communicated with a first branch pipe and a second branch pipe. The first branch pipe is communicated with the hot gas intake end of an evaporation crystallizer. The second branch pipe is communicated with the intake end of a drying device. The vertical pipes are controlled by solenoid valves; an inner pipe is coaxially arranged in the vertical pipe. A through hole is provided on the lower end surface of the vertical pipe. The lower end of the inner pipe is slidably sealed with the through hole and the lower end of the inner pipe is closed. The inner pipe is provided with air outlet holes and the inner wall of the inner pipe is wrapped with a dust removal cloth. An iron sheet is fixedly connected to the upper end edge of the inner pipe. An electromagnet capable of adsorbing the iron sheet is fixedly arranged in the vertical pipe; a cleaning tank is fixedly arranged below the vertical pipe. The lower part of the cleaning tank is communicated with a liquid storage chamber. The liquid storage chamber is communicated with the evaporation chamber of the evaporation crystallizer through a connecting pipe. A valve is arranged on the connecting pipe. A cleaning pipe is vertically and fixedly arranged in the cleaning tank. The cleaning pipe is provided with outer water outlet holes. The cleaning pipe is communicated with a water source through a water inlet pipe and is controlled by a control device to spray water. A middle pipe with a closed top surface and the lower end passing through the inner pipe is fixedly arranged at the vertical axis of the inner pipe. A limiting iron ring is fixedly arranged at the lower part inside the middle pipe. A magnet sheet is adapted above the limiting iron ring. A rubber plug for sealing and limiting the iron ring is fixedly connected to the bottom surface of the magnet sheet. The inner diameter of the limiting iron ring is the same as the outer diameter of the cleaning pipe and the cleaning pipe is located directly below the limiting iron ring.

2. The gas recovery and utilization system for a cement production line with a chlorine removal function according to claim 1, characterized in that: The control device includes an inner water inlet pipe with a closed top surface and slidably sealed inside the cleaning pipe. The top surface of the inner water inlet pipe is fixedly connected with the inner wall of the top surface of the cleaning pipe through a spring. The inner water inlet pipe passes through the cleaning tank and is communicated with an external water source. The inner wall of the top surface of the cleaning pipe is fixedly connected with the top surface of the inner water inlet pipe through a spring. Inner water outlet holes that can be misaligned with the outer water outlet holes are respectively arranged on the side surface of the inner water inlet pipe. When the spring is compressed, the outer water outlet holes are communicated with the inner water outlet holes.

3. The gas recovery and utilization system for a cement production line with chlorine removal function according to claim 2, characterized in that: The lower end of the vertical pipe is closed by a circular plate. A circular hole is provided on the circular plate. An inner plate is rotatably connected in the circular hole through a sealed bearing. The through hole is arranged on the inner plate. A horizontal shaft is fixedly arranged in the vertical pipe. A through hole is provided on the horizontal shaft. A first rotating shaft is rotatably connected to the through hole through a bearing. A first fan blade is arranged on the first rotating shaft. An inner ring is fixedly arranged in the vertical pipe. The inner ring is rotatably connected with an upper pipe through a bearing. The electromagnet is fixedly arranged on the bottom surface of the upper pipe. The upper pipe and the inner pipe are vertically communicated and the upper end of the upper pipe is coaxial and fixedly connected with the first rotating shaft.

4. The gas recovery and utilization system for a cement production line with chlorine removal function according to claim 3, characterized in that: A card slot is vertically opened in the lower part of the inner wall of the cleaning pipe. A clamping block is slidably fitted in the card slot, and the clamping block is fixedly connected to the inner cleaning pipe. The lower end of the inner cleaning pipe penetrates out of the cleaning tank and is coaxially and rotatably connected to the upper end of the water inlet pipe through a sealing bearing. A second rotating shaft is coaxially arranged in the water inlet pipe, and a rotating paddle is sleeved on the second rotating shaft. A iron ring gasket is fixedly arranged on the bottom surface of the middle pipe. A circular through groove is opened on the bottom surface of the cleaning chamber. An inner magnet plate is rotatably connected in the circular through groove through a sealing bearing. The inner water inlet pipe penetrates through the inner magnet plate and is rotatably connected to the inner magnet plate through a sealing bearing. The bottom surface of the inner magnet plate is fixedly connected to an outer pipe. The inner water inlet pipe and the outer pipe are coaxial and penetrate out of the outer pipe. The outer pipe is driven to rotate by a rotating device, and the rotation direction is opposite to the rotation direction of the inner water inlet pipe. The center of the top surface of the cleaning pipe is vertically connected upward with a rotating shaft, and the rotating shaft is sleeved with a rotating support plate through a bearing.

5. The gas recovery and utilization system for a cement production line with a chlorine removal function according to claim 4, characterized in that: The rotating device includes a third rotating shaft coaxially arranged in the total air outlet pipe. A second fan blade is sleeved on the third rotating shaft. A first driving bevel gear is also sleeved on the second rotating shaft. A cross shaft is horizontally arranged in the total air outlet pipe. Both ends of the cross shaft penetrate out of the total air outlet pipe and are rotatably connected through a sealing bearing where they penetrate out of the total air outlet pipe. A first driven bevel gear meshing with the first driving bevel gear is sleeved on the cross shaft. A second driving bevel gear is sleeved on the outer end of the cross shaft. A cross plate is also arranged on the side of the cleaning tank. A vertical shaft is rotatably connected to the cross plate through a bearing. A driving gear and a second driven bevel gear meshing with the second driving bevel gear are sleeved on the vertical shaft. A driven gear is sleeved on the outer pipe. The driving gear and the driven gear are driven by a chain.

6. The gas recovery and utilization system for a cement production line with a chlorine removal function according to claim 1, characterized in that: The connecting pipe includes a branch connecting pipe and a main connecting pipe. The branch connecting pipe is communicated with the corresponding cleaning tank, and the branch connecting pipes are all communicated on the main connecting pipe, and the main connecting pipe inclines downward in the direction of the liquid storage chamber.

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