Multi-stage waste gas purification device of rotary kiln incinerator

Abstract

The multi-stage waste gas purification device comprises a multi-stage filtering mechanism, a water tower cleaning and cooling mechanism, an acid-base neutralization mechanism and a heavy metal treatment mechanism, the multi-stage filtering mechanism comprises a filtering box, and a sealing top cover is fixedly installed at the top end of the filtering box; three servo motors are evenly and fixedly installed at the top end of the sealing top cover, a first air inlet pipe is fixedly connected to one end of the filtering box, a first exhaust pipe is fixedly installed at the top end, away from one end of the first air inlet pipe, of the sealing top cover, and a controller is fixedly installed on one side of the top end of the sealing top cover. The tail gas purification device integrates multiple purification functions of impurity filtration, water tower cleaning and cooling, acid-base neutralization, heavy metal adsorption by activated carbon and the like, can comprehensively and effectively treat harmful substances such as large-particle impurities, dust, acidic or alkaline gas and heavy metal in tail gas of the rotary kiln incinerator, and improves the tail gas purification effect.

Description

Technical Field

[0001] The invention relates to the field of waste gas purification, in particular to a multi-stage waste gas purification device for a rotary kiln incinerator. Background Art

[0002] In the process of industrial production, especially in the operation of equipment such as rotary kiln incinerators, a large amount of exhaust gas will be generated, which contains large particle impurities, dust, acidic or alkaline gases, heavy metals and other harmful substances. If these exhaust gases are directly discharged into the atmosphere, they will cause serious pollution to the environment and pose a threat to human health. Traditional exhaust gas treatment methods often require shutdown maintenance, and there are problems of complex operation and high maintenance difficulty. Therefore, a multi-stage exhaust gas purification device for rotary kiln incinerators is urgently needed to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a multi-stage exhaust gas purification device for a rotary kiln incinerator to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-stage exhaust gas purification device for a rotary kiln incinerator, comprising a multi-stage filtering mechanism, a water tower cleaning and cooling mechanism, an acid-base neutralization mechanism and a heavy metal treatment mechanism, wherein the multi-stage filtering mechanism comprises a filter box, a sealing top cover is fixedly installed on the top of the filter box, three servo motors are evenly fixedly installed on the top of the sealing top cover, one end of the filter box is fixedly connected to a first air inlet pipe, a first exhaust pipe is fixedly installed on the top of the sealing top cover away from one end of the first air inlet pipe, a controller is fixedly installed on one side of the top of the sealing top cover, an impurity baffle is fixedly installed on the inner side of one end of the filter box close to the first air inlet pipe, and three servo motors are evenly fixedly connected to the inner bottom of the filter box. A support base plate, wherein two limit sliding rods are symmetrically fixedly installed on one side of the support base plate close to the impurity baffle, a threaded rod is rotatably installed on the middle part of one side of the support base plate close to the impurity baffle, the outer side of the threaded rod is threadedly connected with a lifting plate, two ends of the lifting plate are respectively slidably connected to the outer sides of the two limit sliding rods, a metal brush is fixedly installed on the side of the lifting plate away from the impurity baffle, three filter screens are evenly fixedly installed inside the multi-stage filtering mechanism, and the filter screens are located at the top end of the support base plate, and four conical storage bins are evenly fixedly connected to the bottom end of the filter box, a plug-in plate is movably plugged into the bottom end of one side of the conical storage bin, and each of the support base plates is located between two of the conical storage bins.

[0005] Preferably, the top end of the threaded rod is fixedly mounted on the driving end of the servo motor, the controller is electrically connected to the three servo motors respectively by wire, the end of the metal brush away from the lifting plate is in contact with the side of the filter screen close to the first air inlet pipe, the top end of the limiting sliding rod is fixedly mounted on the sealing top cover, and the top end of the threaded rod is rotatably connected to the sealing top cover.

[0006] Preferably, the water tower cleaning and cooling mechanism and the acid-base neutralization mechanism are configured the same, the water tower cleaning and cooling mechanism comprises a water tower, a second air inlet pipe is fixedly connected to the bottom end of one side of the water tower, a second exhaust pipe is fixedly installed on the top of the water tower, a storage bucket is provided on the side of the water tower, a water pump is fixedly installed on the top of the storage bucket, a water pipe is installed at the input end of the water pump, a branch water pipe is fixedly installed at the output end of the water pump, a drain pipe is fixedly connected to the bottom end of the outer side of the water tower, one end of the branch water pipe away from the water pump passes through the side wall of the water tower and is located inside the water tower, a plurality of annular water pipes are evenly fixedly installed above the interior of the water tower, the annular water pipes are connected to the branch water pipes, and a plurality of atomizing nozzles are evenly fixedly installed on the bottom end of the annular water pipes.

[0007] Preferably, the heavy metal processing mechanism includes a branch purification box, one end of the branch purification box is fixedly connected to a third air inlet pipe, two plug-in frames are fixedly connected inside the branch purification box, a partition plate is fixedly connected inside the branch purification box, and the partition plate is located at the center of the branch purification box, two activated carbon placement boxes are symmetrically and movably plugged into the plug-in frame, two sealing rubber rings are nested at the top end of the outer side of the activated carbon placement box, an activated carbon placement groove is provided at the bottom end of the activated carbon placement box, a second plug-in groove is provided at the bottom end of one side of the activated carbon placement box, a plug-in sealing plate is movably plugged into the inside of the second plug-in groove, two first slots are symmetrically provided in the middle part of the plug-in frame located near the third air inlet pipe near one side of the third air inlet pipe, two second slots are symmetrically provided on the inner side of the branch purification box near one end of the third air inlet pipe, and two support plate slots are symmetrically and fixedly connected to the bottom end of the interior of the branch purification box near one end of the third air inlet pipe.

[0008] Preferably, a top cover is fixedly installed on the top of the branch purification box, and two discharge tubes are symmetrically fixedly installed at one end of the top cover away from the third air inlet pipe, and four plug interfaces are symmetrically opened on the top of the top cover, and the top of the top cover away from the top of one end of the discharge tube is fixedly connected to a V-shaped support frame, and the top of the V-shaped support frame is symmetrically opened with two first plugging grooves, and the inner sides of the first plugging grooves are movably inserted with a cut-off plug plate, and the top of the top cover is located at the middle of both sides of the V-shaped support frame. The top of the top cover is located at the middle of the two sides of the V-shaped support frame, and a locking rod is slidably connected to the inside of the limiting ring, and a retaining ring is fixedly connected to the outside of the locking rod, and a spring is nested on the outside of the locking rod, one end of the locking rod is movably inserted in the middle of the bottom end of the V-shaped support frame, and a pull ring is threadedly connected to the end of the locking rod away from the V-shaped support frame, one end of the spring is close to the retaining ring, and the other end of the spring is close to the limiting ring.

[0009] Preferably, the two discharge cylinders are distributed on both sides of the partition plate, the activated carbon placement box is movably inserted into the inner side of the plug interface, the two sides of the truncated plug plate are movably inserted into the inner sides of the first slot and the second slot respectively, and the bottom end of the truncated plug plate is movably inserted into the top end of the support plate groove, a groove is provided at the bottom end of the truncated plug plate, a plug hole is penetrated through the middle part of the truncated plug plate near the top end, and the locking rod is movably inserted into the inner side of the plug hole in the middle part of the truncated plug plate near the top end.

[0010] Preferably, the first exhaust pipe is connected to the end of the second air inlet pipe in the water tower cleaning and cooling mechanism away from the water tower through a pipe, the water tower in the water tower cleaning and cooling mechanism is connected to the end of the second air inlet pipe in the acid-base neutralization mechanism away from the water tower through the second exhaust pipe, and the water tower in the acid-base neutralization mechanism is connected to the end of the third air inlet pipe away from the branch purification box through the second exhaust pipe.

[0011] Preferably, the three filters are filters of different mesh sizes, the filter close to the first air inlet pipe is a coarse filter, the filter in the middle is a fine filter, and the filter farthest from the first air inlet pipe is an ultrafine filter.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention integrates multiple purification functions such as impurity filtering, water tower cleaning and cooling, acid-base neutralization and activated carbon adsorption of heavy metals, and can comprehensively and effectively treat large-particle impurities, dust, acidic or alkaline gases, heavy metals and other harmful substances in the exhaust gas of the rotary kiln incinerator, thereby improving the exhaust gas purification effect. Through multiple filter screens and a timed metal brush cleaning mechanism, large-particle impurities in the exhaust gas and impurities adhering to the filter screen are effectively removed, and the stability and durability of the filtration efficiency are maintained. A more convenient operation method is designed for the replacement of activated carbon. The design of components such as the activated carbon placement box and the cut-off plug plate is convenient for replacement and maintenance, reducing the difficulty of maintenance. After the activated carbon adsorption is saturated, it can be easily replaced to ensure that the device continuously and effectively removes heavy metals and other harmful substances in the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main three-dimensional structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of the multi-stage filtering mechanism in the present invention;

[0016] Figure 3 It is a schematic diagram of the internal structure of the multi-stage filtering mechanism in the present invention;

[0017] Figure 4 It is a schematic diagram of the internal structure of the multi-stage filtering mechanism in the present invention;

[0018] Figure 5 It is a schematic diagram of the structure of the water tower cleaning and cooling mechanism in the present invention;

[0019] Figure 6 It is a schematic diagram of the cutaway structure of the water tower cleaning and cooling mechanism in the present invention;

[0020] Figure 7 It is a structural schematic diagram of the heavy metal treatment mechanism in the present invention;

[0021] Figure 8 This is a schematic diagram of the internal structure of the branch purification box in the present invention;

[0022] Fig. 9 It is a schematic diagram of the top cover structure of the heavy metal treatment mechanism in the present invention;

[0023] Fig.10 It is a schematic diagram of the structure of the activated carbon placement box in the present invention.

[0024] In the figure: 1-multi-stage filtering mechanism, 2-water tower cleaning and cooling mechanism, 3-acid-base neutralization mechanism, 4-heavy metal treatment mechanism, 5-filter box, 6-sealed top cover, 7-first air inlet pipe, 8-controller, 9-servo motor, 10-first exhaust pipe, 11-conical storage bin, 12-plug-in board, 13-impurity baffle, 14-lifting plate, 15-metal brush, 16-limiting slide rod, 17-threaded rod, 18-filter screen, 19-support bottom plate, 20-water tower, 21-second air inlet pipe, 22-drain pipe, 23-storage bucket, 24-water pump, 25-branch water pipe, 26-first Second exhaust pipe, 27-annular water pipe, 28-atomizing nozzle, 30-branch purification box, 31-top cover, 32-activated carbon placement box, 33-discharge tube, 34-third air inlet pipe, 35-cut-off plug-in plate, 36-plug-in frame, 37-partition plate, 38-first slot, 39-second slot, 40-support plate slot, 41-plug-in interface, 42-V-shaped support frame, 43-first plug-in slot, 44-limiting ring, 45-locking plug rod, 46-blocking ring, 47-spring, 48-pull ring, 49-sealing rubber ring, 50-activated carbon placement slot, 51-second plug-in slot, 52-plug-in sealing plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 4, an embodiment provided by the present invention: a multi-stage exhaust gas purification device for a rotary kiln incinerator, comprising a multi-stage filtering mechanism 1, a water tower cleaning and cooling mechanism 2, an acid-base neutralization mechanism 3 and a heavy metal treatment mechanism 4, characterized in that: the multi-stage filtering mechanism 1 comprises a filter box 5, a sealing top cover 6 is fixedly installed on the top of the filter box 5, three servo motors 9 are evenly fixedly installed on the top of the sealing top cover 6, one end of the filter box 5 is fixedly connected to a first air inlet pipe 7, a first exhaust pipe 10 is fixedly installed on the top of the sealing top cover 6 away from the first air inlet pipe 7, and the sealing top A controller 8 is fixedly installed on one side of the top of the cover 6, and an impurity baffle 13 is fixedly installed on the inner side of one end of the filter box 5 close to the first air inlet pipe 7. When the exhaust gas carrying large particles of impurities enters the interior of the filter box 5, it hits the impurity baffle 13 and falls downward, so that the first step of filtering can be performed, reducing the probability of clogging of the filter screen 18 and the impact of rapidly flowing impurities on the filter screen 18, thereby increasing its service life. The inner bottom end of the filter box 5 is evenly fixedly connected with three supporting bottom plates 19, and two supporting bottom plates 19 are symmetrically fixedly installed on one side of the supporting bottom plate 19 close to the impurity baffle 13. A limit slide bar 16 is provided, and a threaded rod 17 is rotatably installed in the middle of one side of the support bottom plate 19 close to the impurity baffle 13. The outer side of the threaded rod 17 is threadedly connected with a lifting plate 14. The two ends of the lifting plate 14 are respectively slidably connected to the outer sides of the two limit slide bars 16. The limit slide bars 16 are used to limit the lifting plate 14 so that it can move in the vertical direction. A metal brush 15 is fixedly installed on the side of the lifting plate 14 away from the impurity baffle 13. Three filter screens 18 are evenly fixedly installed inside the multi-stage filtering mechanism 1, and the filter screens 18 are located at the support bottom plate 19. At the top, three filters 18 are filters of different mesh sizes, the filter 18 close to the first air inlet pipe 7 is a coarse filter, the filter 18 in the middle is a fine filter, and the filter 18 far away from the first air inlet pipe 7 is an ultrafine filter. The triple filtration removes a large amount of particulate impurities, and the bottom end of the filter box 5 is evenly and fixedly connected with four conical storage bins 11, and a plug-in plate 12 is movably connected to the bottom end of one side of the conical storage bin 11, and each supporting bottom plate 19 is located between two conical storage bins 11, dividing the interior of the filter box 5 into four spaces.

[0027] The top end of the threaded rod 17 is fixedly mounted on the driving end of the servo motor 9, and the controller 8 is electrically connected to the three servo motors 9 by wires. The timing control program can be set through the controller 8 to realize the automatic lifting of the lifting plate 14 to clean the dust on the outside of the filter 18. The end of the metal brush 15 away from the lifting plate 14 is in contact and connected with the side of the filter 18 close to the first air inlet pipe 7. The top end of the limiting slide rod 16 is fixedly mounted on the sealing top cover 6, and the top end of the threaded rod 17 is rotatably connected to the sealing top cover 6.

[0028] See also Figure 5 and Figure 6The water tower cleaning and cooling mechanism 2 and the acid-base neutralization mechanism 3 are configured in the same manner. The water tower cleaning and cooling mechanism 2 includes a water tower 20. A second air inlet pipe 21 is fixedly connected to the bottom end of one side of the water tower 20. A second exhaust pipe 26 is fixedly installed on the top of the water tower 20. A storage barrel 23 is provided on the side of the water tower 20. Corresponding water or reaction regulating liquid is poured into the storage barrel 23. A water pump 24 is fixedly installed on the top of the storage barrel 23. A water pipe is installed at the input end of the water pump 24. The water pump 24 extracts the liquid in the storage barrel 23 through the water pipe. A distribution pipe is fixedly installed at the output end of the water pump 24. A branch water pipe 25 and a drain pipe 22 are fixedly connected to the bottom end of the outer side of the water tower 20. The end of the branch water pipe 25 away from the water pump 24 passes through the side wall of the water tower 20 and is located inside the water tower 20. A plurality of annular water pipes 27 are evenly and fixedly installed above the interior of the water tower 20. The annular water pipes 27 are connected to the branch water pipes 25. A plurality of atomizing nozzles 28 are evenly and fixedly installed at the bottom end of the annular water pipes 27. The liquid pumped out by the water pump 24 is transported to the interior of each annular water pipe 27 through the branch water pipes 25 and sprayed on the interior of the water tower 20 through the atomizing nozzles 28 to treat the exhaust gas.

[0029] See also Figure 7-Figure 10 The heavy metal treatment mechanism 4 includes a branch purification box 30, one end of which is fixedly connected to a third air inlet pipe 34, two plug-in frames 36 are fixedly connected inside the branch purification box 30, a partition plate 37 is fixedly connected inside the branch purification box 30, and the partition plate 37 is located at the center of the branch purification box 30. Two activated carbon placement boxes 32 are symmetrically and movably plugged into the plug-in frame 36, and two sealing rubber rings 49 are nested at the top of the outer side of the activated carbon placement box 32. An activated carbon placement groove 50 is provided at the bottom end of the activated carbon placement box 32, and a second plug-in groove 51 is provided at the bottom end of one side of the activated carbon placement box 32. The second plug-in groove 51 is provided inside A plug-in sealing plate 52 is movably inserted in the part, and activated carbon can be easily poured or loaded through the plug-in sealing plate 52. Two first slots 38 are symmetrically provided in the middle part of the plug-in frame 36 near the third air inlet pipe 34 on one side thereof, and two second slots 39 are symmetrically provided on the inner side of the branch purification box 30 near one end of the third air inlet pipe 34. Two support plate slots 40 are symmetrically fixedly connected to the inner bottom end of the branch purification box 30 near one end of the third air inlet pipe 34. The two sides of the cut-off plug-in plate 35 are respectively inserted in the inner sides of the first slot 38 and the second slot 39 and the bottom end of the cut-off plug-in plate 35 is inserted in the top of the support plate slot 40 to achieve exhaust gas interception.

[0030] A top cover 31 is fixedly installed on the top of the branch purification box 30, and two discharge cylinders 33 are symmetrically fixedly installed on the end of the top cover 31 away from the third air inlet pipe 34. Four plug interfaces 41 are symmetrically opened on the top of the top cover 31, and the plug interfaces 41 are used to facilitate the pulling out or plugging of the activated carbon placement box 32. A V-shaped support frame 42 is fixedly connected to the top of the top cover 31 away from the top of one end of the discharge cylinder 33. Two first plug-in grooves 43 are symmetrically opened on the top of the V-shaped support frame 42, and a cut-off plug-in plate 35 is movably inserted into the inner side of the first plug-in groove 43. The V-shaped design of the V-shaped support frame 42 makes the two cut-off plug-ins 35 inserted in the first plug-in groove 43 divide the interior of the branch purification box 30 into two channels. The diversion of the two channels can realize the replacement of activated carbon without stopping the machine. The top of the top cover 31 is located at the V-shaped support Limiting rings 44 are fixedly installed at the middle positions on both sides of the support frame 42, and a locking rod 45 is slidably connected inside the limiting ring 44, and a retaining ring 46 is fixedly connected to the outer side of the locking rod 45, and a spring 47 is embedded on the outer side of the locking rod 45. One end of the locking rod 45 is movably inserted in the middle of the bottom end of the V-shaped support frame 42, and a pull ring 48 is threadedly connected to the end of the locking rod 45 away from the V-shaped support frame 42, one end of the spring 47 is close to the retaining ring 46, and the other end of the spring 47 is close to the limiting ring 44. When the pull ring 48 is pulled away from the limiting ring 44 by external force, the pull ring 48 drives the locking rod 45 to move and at the same time drives the retaining ring 46 to move closer to the limiting ring 44. The movement of the retaining ring 46 squeezes the spring 47 to contract. When the tension is lost, the spring 47 rebounds and pushes the locking rod 45 to return to its initial position.

[0031] The two discharge cylinders 33 are distributed on both sides of the partition plate 37, the activated carbon placement box 32 is movably plugged into the inner side of the plug interface 41, the two sides of the cut-off plug plate 35 are movably plugged into the inner sides of the first slot 38 and the second slot 39 respectively, and the bottom end of the cut-off plug plate 35 is movably plugged into the top end of the support plate groove 40, a groove is provided at the bottom end of the cut-off plug plate 35, and a plug-in hole is provided through the middle position of the cut-off plug plate 35 near the top, the locking rod 45 is movably plugged into the inner side of the plug-in hole in the middle part of the cut-off plug plate 35 near the top, when the locking rod 45 is located at the groove at the bottom end of the cut-off plug plate 35, the inside of the branch purification box 30 is unobstructed, when the locking rod 45 is located in the plug-in hole at the top end of the cut-off plug plate 35, the exhaust gas flowing in the branch purification box 30 is cut off, and the two cut-off plug plates 35 can be staggered and inserted into the branch purification box 30 to cut off, so that the activated carbon can be replaced during the exhaust gas purification process.

[0032] See also Figure 1The first exhaust pipe 10 is connected to the end of the second air inlet pipe 21 in the water tower cleaning and cooling mechanism 2 away from the water tower 20 through a pipe. The water tower 20 in the water tower cleaning and cooling mechanism 2 is connected to the end of the second air inlet pipe 21 in the acid-base neutralization mechanism 3 away from the water tower 20 through the second exhaust pipe 26. The water tower 20 in the acid-base neutralization mechanism 3 is connected to the end of the third air inlet pipe 34 away from the branch purification box 30 through the second exhaust pipe 26. The four mechanisms are connected in sequence to perform multiple purification treatments on the exhaust gas.

[0033] Working principle: During use, firstly, the timing start program is set through the controller 8, and the lifting plate 14 is located at the top of the filter box 5 in the initial state, and then clean water is injected into the storage barrel 23 in the water tower cleaning and cooling mechanism 2, and acid-base neutralizing liquid is injected into the storage barrel 23 in the acid-base neutralization mechanism 3 according to the pH value in the tail gas, and the drainage pipes 22 in the water tower cleaning and cooling mechanism 2 and the acid-base neutralization mechanism 3 are connected to the wastewater collection box, and then activated carbon is filled in the activated carbon placement box 32, and then the end of the first air inlet pipe 7 away from the filter box 5 is connected to the tail gas discharge end of the rotary kiln incinerator;

[0034] The exhaust gas enters the interior of the filter box 5 through the first air inlet pipe 7. When large particles of impurities enter the interior of the filter box 5, they hit the impurity baffle 13 and fall downward to the interior of the conical storage bin 11. The exhaust gas flowing out from the side of the impurity baffle 13 is filtered through three filters 18 to remove the impurity particles in the exhaust gas. When the timing is reached, the controller 8 controls the servo motor 9 to start, and the driving end of the servo motor 9 drives the threaded rod 17 to rotate. Since the threaded rod 17 is threadedly connected to the middle part of the lifting plate 14, the rotating threaded rod 17 pushes the lifting plate 14 to move downward, and the movement of the lifting plate 14 drives the metal brush 15 to move downward, and the moving metal brush 15 The impurities adhered to the outside of the filter 18 are cleaned, and the impurities that fall after cleaning fall into the inside of the conical storage bin 11. When the lifting plate 14 moves to the bottom end of the threaded rod 17, the controller 8 controls the servo motor 9 to rotate in the opposite direction, and the driving end of the servo motor 9 drives the threaded rod 17 to reverse, thereby pushing the lifting plate 14 to move upward to the initial position. On the way, the filter 18 is cleaned for a second time, and the impurities inside the conical storage bin 11 are cleaned regularly. The plug-in board 12 is pulled away from the conical storage bin 11 by external force, and the impurities inside the conical storage bin 11 lose support and fall downward. After cleaning, the plug-in board 12 is pushed by external force to be plugged into the inside of the conical storage bin 11;

[0035] The filtered exhaust gas is transported to the inside of the second air intake pipe 21 in the water tower cleaning and cooling mechanism 2 through the first exhaust pipe 10. The second air intake pipe 21 transports the exhaust gas to the inside of the water tower 20. The input end of the water pump 24 extracts the clean water in the storage bucket 23 through the water pipe and transports it to the inside of the branch water pipe 25 through the output end. The branch water pipe 25 transports the clean water to the annular water pipe 27 respectively. The annular water pipe 27 sprays the clean water on the inside of the water tower 20 through the atomizing nozzle 28. The exhaust gas entering through the second air intake pipe 21 is directed to the inside of the water tower 20. During the upward flow, the water mist sprayed by the atomizing nozzle 28 absorbs the dust in the exhaust gas and condenses it into water droplets, which fall down and are discharged to the wastewater collection box through the drain pipe 22. At the same time, the temperature of the exhaust gas cleaned by the water mist drops, and then the water tower cleaning and cooling mechanism 2 transports the exhaust gas to the second air inlet pipe 21 in the acid-base neutralization mechanism 3 through the second exhaust pipe 26. The exhaust gas entering the water tower 20 through the second air inlet pipe 21 reacts with the acid-base neutralization liquid sprayed by the atomizing nozzle 28 to remove the acid or alkaline gas in the exhaust gas;

[0036] The tail gas after the acid-base neutralization treatment is transported to the third intake pipe 34 through the second exhaust pipe 26 in the acid-base neutralization mechanism 3, and the tail gas enters the interior of the branch purification box 30 through the third intake pipe 34, and the tail gas is divided into two streams for heavy metal treatment respectively, and the heavy metals and other harmful substances in the tail gas are adsorbed by the activated carbon in the activated carbon placement box 32, and the treated tail gas is discharged into the air through the discharge tube 33. When the activated carbon in the activated carbon placement box 32 needs to be replaced, the activated carbon in the activated carbon placement box 32 on one side is replaced first, and the pull ring 48 is pulled away by external force. The movement of the pull ring 48 drives the locking rod 45 to move and compress the spring 47 to contract. When the end of the locking rod 45 away from the pull ring 48 is away from the cutting plate 35, the cutting plate 35 is pressed downward by external force to insert the cutting plate 35 into the inner sides of the first slot 38 and the second slot 39, and the force applied to the pull ring 48 is removed until the bottom end of the cutting plate 35 is inserted into the top end of the support plate groove 40, and the insertion hole at the top position of the cutting plate 35 and the locking rod 45 are located at the same horizontal line. At this time, the locking rod 45 loses the support spring 47 of the cutting plate 35 to rebound and push The dynamic locking plug rod 45 is inserted through the plug hole at the top of the truncation plug plate 35 and inserted into the bottom inner side of the first plug groove 43. At this time, the truncation plug plate 35 cuts off the delivery of the exhaust gas on one side of the branch purification box 30, and then the activated carbon placement box 32 is pulled upward by external force until the bottom end of the activated carbon placement box 32 is separated from the top of the plug interface 41, and then the plug sealing plate 52 is pulled away from the activated carbon placement box 32 by external force, the activated carbon in the activated carbon placement box 32 is poured out and the new activated carbon is placed in the activated carbon placement box 32, and then the plug sealing plate 52 is completely pushed by external force. Insert it into the inner side of the second insertion groove 51, and completely insert the activated carbon placement box 32 into the inner side of the insertion interface 41. After the activated carbon on one side is replaced, replace the activated carbon on the other side. Pull the pull ring 48 away from the limit ring 44 through external force until the locking rod 45 is disengaged from the insertion hole of the cut-off plug plate 35, and then pull the cut-off plug plate 35 upward through external force. When the cut-off plug plate 35 moves to the bottom groove higher than the top of the locking rod 45, the spring 47 rebounds and pushes the locking rod 45 to be inserted into the inner side of the bottom end of the first insertion groove 43, and then the activated carbon on the other side can be replaced in the same way.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that numerous changes, modifications, substitutions and alterations may be made to the embodiments without departing from the spirit and scope of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage exhaust gas purification device for a rotary kiln incinerator, comprising a multi-stage filtering mechanism (1), a water tower cleaning and cooling mechanism (2), an acid-base neutralization mechanism (3) and a heavy metal treatment mechanism (4), characterized in that: The multi-stage filtering mechanism (1) comprises a filter box (5), a sealing top cover (6) is fixedly mounted on the top of the filter box (5), three servo motors (9) are evenly fixedly mounted on the top of the sealing top cover (6), one end of the filter box (5) is fixedly connected to a first air intake pipe (7), a first exhaust pipe (10) is fixedly mounted on the top of the sealing top cover (6) away from the first air intake pipe (7), a controller (8) is fixedly mounted on one side of the top of the sealing top cover (6), an impurity baffle (13) is fixedly mounted on the inner side of one end of the filter box (5) close to the first air intake pipe (7), three supporting bottom plates (19) are evenly fixedly mounted on the inner bottom of the filter box (5), two limiting sliding bars (16) are symmetrically fixedly mounted on one side of the supporting bottom plate (19) close to the impurity baffle (13), and the supporting A threaded rod (17) is rotatably mounted on the middle part of one side of the bottom plate (19) close to the impurity baffle (13); a lifting plate (14) is threadedly connected to the outer side of the threaded rod (17); two ends of the lifting plate (14) are respectively slidably connected to the outer sides of the two limit sliding rods (16); a metal brush (15) is fixedly mounted on the side of the lifting plate (14) away from the impurity baffle (13); three filter screens (18) are evenly fixedly mounted inside the multi-stage filtering mechanism (1), and the filter screens (18) are located at the top of the supporting bottom plate (19); four conical storage bins (11) are evenly fixedly connected to the bottom end of the filter box (5); a plug-in plate (12) is movably plugged into the bottom end of one side of the conical storage bin (11), and each of the supporting bottom plates (19) is located between two conical storage bins (11).

2. The multi-stage exhaust gas purification device of a rotary kiln incinerator according to claim 1, characterized in that: The top end of the threaded rod (17) is fixedly mounted on the driving end of the servo motor (9), the controller (8) is respectively electrically connected to the three servo motors (9) by wires, the end of the metal brush (15) away from the lifting plate (14) is in contact with a side of the filter screen (18) close to the first air inlet pipe (7), the top end of the limiting slide rod (16) is fixedly mounted on the sealing top cover (6), and the top end of the threaded rod (17) is rotatably connected to the sealing top cover (6).

3. The multi-stage exhaust gas purification device of a rotary kiln incinerator according to claim 1, characterized in that: The water tower cleaning and cooling mechanism (2) and the acid-base neutralization mechanism (3) are configured in the same manner. The water tower cleaning and cooling mechanism (2) comprises a water tower (20). A second air inlet pipe (21) is fixedly connected to the bottom end of one side of the water tower (20). A second air outlet pipe (26) is fixedly installed at the top of the water tower (20). A storage bucket (23) is provided on the side of the water tower (20). A water pump (24) is fixedly installed at the top of the storage bucket (23). A water pipe is installed at the input end of the water pump (24). A branch water pipe (25) is fixedly installed at the output end, a drain pipe (22) is fixedly connected to the outer bottom end of the water tower (20), one end of the branch water pipe (25) away from the water pump (24) passes through the side wall of the water tower (20) and is located inside the water tower (20), a plurality of annular water pipes (27) are evenly fixedly installed above the inside of the water tower (20), the annular water pipe (27) is connected to the branch water pipe (25), and a plurality of atomizing nozzles (28) are evenly fixedly installed at the bottom end of the annular water pipe (27).

4. The multi-stage exhaust gas purification device of a rotary kiln incinerator according to claim 1, characterized in that: The heavy metal treatment mechanism (4) comprises a branch purification box (30), one end of which is fixedly connected to a third air inlet pipe (34), two plug-in frames (36) are fixedly connected inside the branch purification box (30), a partition plate (37) is fixedly connected inside the branch purification box (30), and the partition plate (37) is located at the center of the branch purification box (30), two activated carbon placement boxes (32) are symmetrically and movably plugged inside the plug-in frame (36), two sealing rubber rings (49) are embedded at the top end of the outer side of the activated carbon placement box (32), and a movable opening is provided at the bottom end of the activated carbon placement box (32). The activated carbon placement slot (50) is provided with a second plug-in slot (51) at the bottom end of one side of the activated carbon placement box (32), and a plug-in sealing plate (52) is movably plugged in the interior of the second plug-in slot (51), and two first slots (38) are symmetrically provided in the middle of the plug-in frame (36) located near the third air inlet pipe (34) on one side thereof, and two second slots (39) are symmetrically provided on the inner side of the branch purification box (30) near one end of the third air inlet pipe (34), and two support plate slots (40) are symmetrically fixedly connected to the inner bottom end of the branch purification box (30) near one end of the third air inlet pipe (34).

5. The multi-stage exhaust gas purification device of a rotary kiln incinerator according to claim 4, characterized in that: A top cover (31) is fixedly installed on the top of the branch purification box (30), and two discharge tubes (33) are symmetrically fixedly installed on the top of the top cover (31) away from the third air inlet pipe (34). Four plug interfaces (41) are symmetrically provided on the top of the top cover (31). A top of the top cover (31) away from the end of the discharge tube (33) is fixedly connected to a V-shaped support frame (42), and two first plug grooves (43) are symmetrically provided on the top of the V-shaped support frame (42). A cut-off plug plate (35) is movably plugged into the inner side of the first plug groove (43). The top of the top cover (31) is located on the V-shaped support frame ( A limiting ring (44) is fixedly installed at the middle of both sides of the V-shaped support frame (42), a locking rod (45) is slidably connected inside the limiting ring (44), a retaining ring (46) is fixedly connected to the outer side of the locking rod (45), a spring (47) is embedded on the outer side of the locking rod (45), one end of the locking rod (45) is movably inserted into the middle of the bottom end of the V-shaped support frame (42), one end of the locking rod (45) away from the V-shaped support frame (42) is threadedly connected with a pull ring (48), one end of the spring (47) is in close contact with the retaining ring (46), and the other end of the spring (47) is in close contact with the limiting ring (44).

6. The multi-stage exhaust gas purification device of a rotary kiln incinerator according to claim 5, characterized in that: The two discharge cylinders (33) are distributed on both sides of the partition plate (37), the activated carbon placement box (32) is movably plugged into the inner side of the plug interface (41), the two sides of the truncation plug plate (35) are movably plugged into the inner sides of the first slot (38) and the second slot (39), respectively, and the bottom end of the truncation plug plate (35) is movably plugged into the top end of the support plate groove (40), a groove is provided at the bottom end of the truncation plug plate (35), a plug hole is provided through the middle position of the truncation plug plate (35) near the top, and the locking plug rod (45) is movably plugged into the inner side of the plug hole in the middle part of the truncation plug plate (35) near the top.

7. The multi-stage exhaust gas purification device of a rotary kiln incinerator according to claim 3 or 4, characterized in that: The first exhaust pipe (10) is connected to an end of the second air inlet pipe (21) in the water tower cleaning and cooling mechanism (2) away from the water tower (20) through a pipeline; the water tower (20) in the water tower cleaning and cooling mechanism (2) is connected to an end of the second air inlet pipe (21) in the acid-base neutralization mechanism (3) away from the water tower (20) through the second exhaust pipe (26); the water tower (20) in the acid-base neutralization mechanism (3) is connected to an end of the third air inlet pipe (34) away from the branch purification box (30) through the second exhaust pipe (26).

8. The multi-stage exhaust gas purification device of a rotary kiln incinerator according to claim 1, characterized in that: The three filter screens (18) are filter screens of different mesh sizes. The filter screen (18) close to the first air inlet pipe (7) is a coarse filter screen, the filter screen (18) in the middle is a fine filter screen, and the filter screen (18) far from the first air inlet pipe (7) is an ultrafine filter screen.

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