Chemical waste salt high-temperature pyrolysis harmless treatment device and treatment method

Abstract

The invention discloses a chemical waste salt high-temperature pyrolysis harmless treatment device and method, and belongs to the technical field of waste salt incineration pyrolysis. A chemical waste salt high-temperature pyrolysis harmless treatment device comprises a pyrolyzing furnace, a feeding pipe is arranged at the top of a furnace body, a discharging pipe is arranged at the bottom of the furnace body, an exhaust port for exhausting waste gas is formed in the upper portion of the furnace body, and a heating element is arranged on the side wall of the furnace body. The furnace body is internally provided with a dispersing mechanism for dispersing waste salt, the dispersing mechanism is located under the feeding pipe, the furnace body is internally provided with a homogenizing mechanism for homogenizing the waste salt, the homogenizing mechanism is located under the dispersing mechanism, and the dispersing mechanism and the homogenizing mechanism are connected through a transmission mechanism; and an air nozzle for suspending waste salt is arranged in the furnace body. By adopting the high-temperature pyrolysis harmless treatment device and method for the chemical waste salt, the problems that the incineration temperature is high and the waste salt is prone to caking and slagging in the incineration treatment process of the waste salt can be solved, and harmless treatment of the waste salt is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of waste salt incineration and pyrolysis, and in particular to a high-temperature pyrolysis harmless treatment device and a treatment method for chemical waste salt. Background Art

[0002] Industrial waste salt residue is mainly produced in industrial production processes such as pesticide intermediates, drug synthesis and printing and dyeing, as well as solid-liquid separation, solution concentration crystallization and sewage treatment. It has the characteristics of various types, complex composition, many sources, high treatment cost and great environmental harm. At present, waste salt is generally treated by enterprises building warehouses for centralized temporary storage, but how to thoroughly treat and dispose of it harmlessly has become a practical problem that needs to be solved urgently.

[0003] The existing terminal treatment technologies for waste salt are mainly landfill, incineration and harmless comprehensive utilization. Landfill is to solidify the waste salt with concrete and send it to a rigid landfill for sanitary landfill disposal in accordance with landfill technical specifications. Incineration is to heat the waste salt to 900 ℃, and the inorganic salt melts and flows into the bottom of the furnace. After cooling, it is recovered, and the organic matter volatilizes and decomposes at high temperature. Due to the large fluctuation in the melting point range of waste salt, adverse phenomena such as slagging and agglomeration are very likely to occur during the incineration process, affecting the stability of the process. In this context, the harmless resource comprehensive utilization of waste salt has become an inevitable way out for waste salt, and the factors restricting its large-scale resource development are mainly the removal of organic matter in waste salt. Summary of the invention

[0004] The purpose of the present invention is to provide a high-temperature pyrolysis harmless treatment device and method for chemical waste salt, so as to solve the problems of high incineration temperature of waste salt and easy agglomeration and slagging of waste salt during incineration treatment, and realize harmless treatment of waste salt.

[0005] To achieve the above-mentioned purpose, the present invention provides a high-temperature pyrolysis and harmless treatment device for chemical waste salt, including a pyrolysis furnace, the pyrolysis furnace including a furnace body, a feed pipe is arranged on the top of the furnace body, a discharge pipe is arranged on the bottom of the furnace body, an exhaust port for exhausting waste gas is arranged on the upper part of the furnace body, and a heating element is arranged on the side wall of the furnace body; a dispersion mechanism for dispersing the waste salt is arranged inside the furnace body, the dispersion mechanism is located directly below the feed pipe, a uniform mechanism for homogenizing the waste salt is arranged inside the furnace body, the uniform mechanism is located below the dispersion mechanism, and the dispersion mechanism and the uniform mechanism are connected by a transmission mechanism; a tuyere is arranged inside the furnace body to suspend the waste salt.

[0006] Preferably, the dispersion mechanism includes a sleeve and an inner rod, the inner rod is located inside the sleeve and is rotatably connected to the sleeve, the bottom end of the sleeve is provided with a spiral first dispersion blade, the first dispersion blades are distributed in a circular array at the bottom end of the sleeve, the bottom end of the inner rod is provided with a spiral second dispersion blade, the second dispersion blades are distributed in a circular array at the bottom end of the inner rod, the width of the second dispersion blade is greater than the width of the first dispersion blade, and the spiral directions of the first dispersion blade and the second dispersion blade are opposite; a rotating structure is provided on the furnace body to drive the inner rod and the outer tube to rotate in opposite directions.

[0007] Preferably, the rotating structure includes a motor, which is arranged at the top of the furnace body, and a second gear is arranged on the output shaft of the motor, and the second gear is meshed with the first gear arranged on the first transmission shaft, and the first transmission shaft is rotatably connected to the furnace body, and a third bevel gear is arranged at one end of the first transmission shaft, and the third bevel gear is located between the first bevel gear and the second bevel gear, and the third bevel gear is meshed with the first bevel gear and the second bevel gear, and the first bevel gear is arranged at the top of the sleeve, and the second bevel gear is arranged at the top of the inner rod; the other end of the first transmission shaft is connected to the transmission mechanism.

[0008] Preferably, a conical feed plate is provided at the inner top of the furnace body, a fixed seat is provided at the middle part of the bottom end of the feed plate, the fixed seat is connected to the feed plate through the fixed plate, a feed inlet for waste salt to enter is formed between the fixed seat and the feed plate, the sleeve is rotatably connected to the fixed seat, and the sleeve is rotatably connected to the furnace body; a conical guide plate is provided between the second dispersing blade and the uniform mechanism, and the guide plate is fixed on the inner wall of the furnace body.

[0009] Preferably, the uniformity mechanism includes a first rotating shaft and a second rotating shaft, the second rotating shaft is arranged parallel to the first rotating shaft, the second rotating shaft is located below the first rotating shaft, and the first rotating shaft and the second rotating shaft are both rotatably connected to the furnace body; a plurality of rows of first uniformity rods and second uniformity rods are evenly arranged in a circular array on the first rotating shaft, and the first uniformity rods and the second uniformity rods are arranged at intervals; a plurality of rows of third uniformity rods and fourth uniformity rods are evenly arranged in a circular array on the second rotating shaft, and the third uniformity rods and the fourth uniformity rods are arranged at intervals; fins are arranged on the first uniformity rod, the second uniformity rod, the third uniformity rod and the fourth uniformity rod; the first rotating shaft and the second rotating shaft are connected by a reverse rotation structure.

[0010] Preferably, the reverse rotation structure includes a transmission gear, which is arranged at one end of the first rotating shaft extending out of the furnace body, and the transmission gear is connected to the transmission mechanism. An intermediate gear is arranged for the external rotation of the furnace body, and the intermediate gear is meshed with the transmission gear. A first transmission wheel is arranged on the axle of the intermediate gear, and a second transmission wheel is arranged at one end of the second rotating shaft extending out of the furnace body. The first transmission wheel and the second transmission wheel are connected by a transmission belt.

[0011] Preferably, the transmission mechanism includes a transmission box, which is arranged on the furnace body, one end of the first transmission shaft is inserted into the transmission box and is rotatably connected to the transmission box, the first transmission shaft is connected to the second transmission shaft through a swinging structure, the second transmission shaft is coaxially arranged with the first transmission shaft, the second transmission shaft is rotatably connected to the transmission box, and one end of the second transmission shaft located outside the transmission box is connected to the transmission gear through a transmission structure.

[0012] Preferably, the swing structure includes a transmission seat, the transmission seat is located inside the transmission box, guide blocks are provided at both ends of the transmission seat, guide grooves compatible with the guide blocks are provided on the inner wall of the transmission box, the guide blocks are located in the guide grooves and are slidably connected with the guide grooves, the guide grooves and the guide blocks have a guiding effect on the up and down sliding of the transmission seat, the transmission seat is provided with a first slide groove and a second slide groove parallel to each other, a first slider is slidably provided in the first slide groove, the first slider is connected to the first rotating plate through a first connecting shaft, the first connecting shaft and the first rotating plate and the first slider are all rotatably connected, the first rotating plate is coaxially arranged at the end of the first transmission shaft, a second slider is slidably provided in the second slide groove, the second slider is connected to the connecting plate through the second connecting shaft, the second connecting shaft and the second slider and the connecting plate are all rotatably connected, the connecting plate is arranged on the second rotating plate, and the second rotating plate is coaxially arranged on the second transmission shaft; the distance from the second connecting shaft to the axis of the second transmission shaft is greater than the distance from the first connecting shaft to the axis of the first transmission shaft.

[0013] Preferably, the transmission structure includes a swing plate, the top of the swing plate is fixedly connected to the second transmission shaft, the bottom end of the swing plate is provided with an arc-shaped tooth plate, the center of the circle where the tooth plate is located is located on the axis of the second transmission shaft, the tooth plate is meshed with the transmission gear, and the two sides of the first rotating plate are connected to the two ends of the arc through a reinforcing plate.

[0014] The treatment method based on the above-mentioned high-temperature pyrolysis harmless treatment device for chemical waste salt comprises the following steps: S1, start the heating element to heat the furnace body, feed the dried waste salt into the furnace body through the feed pipe, and the waste salt falls downward from the feed port onto the first dispersing blade under the guidance of the feed plate; S2, the motor drives the second gear to rotate, the second gear drives the first transmission shaft to rotate through the first gear, the first transmission shaft drives the third bevel gear to rotate, the third bevel gear drives the first bevel gear and the second bevel gear to rotate in the opposite direction, the first bevel gear and the second bevel gear respectively drive the sleeve and the inner rod to rotate in the opposite direction, the waste salt on the first dispersing blade slides along the first dispersing blade under the action of centrifugal force and is thrown outward, the waste salt on the first dispersing blade falls on the second dispersing blade, and the waste salt is further thrown under the action of the second dispersing blade to disperse the waste salt; S3, the first transmission shaft drives the first rotating plate to rotate, the first rotating plate drives the first slider to move through the first connecting shaft, the first slider drives the transmission seat to slide up and down along the guide groove under the action of the first slide groove, and the first slider slides back and forth in the first slide groove; the transmission seat drives the second slider to rise and fall through the second slide groove, and the second slider slides along the second slide groove under the action of the connecting plate and the second rotating plate, and the second slider drives the second transmission shaft to rotate through the second connecting shaft, the connecting plate and the second rotating plate. Since the distance from the second connecting shaft to the second transmission shaft is greater than the distance from the first connecting shaft to the first transmission shaft, the second slider can only slide back and forth in part of the second slide groove, driving the second transmission shaft to swing; the second transmission shaft drives the toothed plate to swing through the swinging plate, the toothed plate drives the transmission gear to rotate reciprocatingly, the transmission gear drives the first rotating shaft to rotate reciprocatingly, the transmission gear drives the first transmission wheel to rotate reversely through the intermediate gear, the first transmission wheel drives the first transmission wheel to rotate reciprocatingly through the transmission belt, and the first transmission wheel drives the second rotating shaft to rotate reversely; S4. The dispersed waste salt is heated in the furnace body and falls on the first uniform rod, the second uniform rod and the fins of the uniform mechanism to stir and disperse the waste salt; the waste salt passes through the first rotating shaft and falls on the third uniform rod, the fourth uniform rod and the fins on the second rotating shaft to further stir and disperse the waste salt; the fan blows air into the furnace body through the air nozzle to extend the descending speed of the waste salt, so that the organic matter contained in the waste salt is fully volatilized or decomposed into gas, and the organic gas is discharged through the exhaust port set on the upper part of the furnace body for subsequent treatment, and the treated waste salt is discharged from the furnace body through the discharge port under the action of gravity.

[0015] The advantages and positive effects of the high-temperature pyrolysis harmless treatment device and treatment method of chemical waste salt described in the present invention are: 1. The spiral directions of the first dispersing blade and the second dispersing blade of the dispersing mechanism are opposite, and the rotation directions are opposite. The first dispersing blade and the second dispersing blade both drive the waste salt to rotate and sprinkle downward, so that the waste salt is fully dispersed, so that the waste salt is evenly sprinkled in the furnace body, which is convenient for fully removing organic matter in the waste salt.

[0016] 2. The first rotating shaft and the second rotating shaft of the uniform mechanism rotate in opposite directions. The reverse rotation allows the waste salt to fully contact the uniform mechanism, thereby improving the removal effect of organic matter in the waste salt. The first uniform rod and the second uniform rod are arranged at intervals on the first rotating shaft, and the third uniform rod and the fourth uniform rod are arranged at intervals on the second rotating shaft, so that the waste salt can fully contact the first uniform rod, the second uniform rod, the third uniform rod, the fourth uniform rod, and the fins, thereby improving the dispersion effect of the waste salt, promoting the full volatilization and decomposition of organic matter in the waste salt, and improving the treatment effect of the waste salt. During the falling process, the waste salt hits the first uniform rod, the second uniform rod, the third uniform rod, the fourth uniform rod, and the fins, thereby reducing the agglomeration of the waste salt and improving the removal of organic matter in the waste salt.

[0017] 3. The uniform mechanism and the dispersed mechanism are connected through a transmission mechanism, which is beneficial to improve the synergy and coordination of the uniform mechanism and the dispersed mechanism and improve the compactness of the structure.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention; Figure 2 It is a side view structural schematic diagram of an embodiment of the present invention; Figure 3 It is a schematic diagram of a top-down stereoscopic structure of an embodiment of the present invention; Figure 4 Schematic diagram of the internal structure of an embodiment of the present invention; Figure 5 It is a schematic diagram of the longitudinal cross-section structure of an embodiment of the present invention; Figure 6 is a schematic diagram of a cross-sectional structure of an embodiment of the present invention; Figure 7 It is a schematic diagram of the structure of the dispersion mechanism of an embodiment of the present invention; Figure 8 It is a schematic diagram of the uniform mechanism structure of an embodiment of the present invention; Fig. 9 Schematic diagram of the internal structure of the transmission box according to the embodiment of the present invention Figure 1 ; Fig.10 Schematic diagram of the internal structure of the transmission box according to the embodiment of the present invention Figure 2 ; Fig.11 It is a schematic diagram of the cross-sectional structure of a transmission box according to an embodiment of the present invention.

[0020] Reference numerals 1. Pyrolysis furnace; 11. Furnace body; 12. Feed pipe; 13. Discharge pipe; 14. Feed plate; 15. Guide plate; 16. Fixed seat; 17. Fixed plate; 18. Feed port; 19. Air nozzle; 2. Dispersing mechanism; 21. Sleeve; 22. Inner rod; 23. First dispersing blade; 24. Second dispersing blade; 25. First bevel gear; 26. Second bevel gear; 27. Third bevel gear; 28. First transmission shaft; 29. ​​First gear; 210. Second gear; 211. Motor; 3. Evenness mechanism; 31. First rotating shaft; 32. First evenness rod; 33. Second evenness rod; 34. Second rotating shaft; 35. Third evenness rod; 36. Fourth evenness rod; 37. Fin; 38. Transmission gear; 39. Intermediate gear; 310. First transmission wheel; 311. Second transmission wheel; 312. Transmission belt.

[0021] 4. Transmission mechanism; 41. Transmission box; 42. Transmission seat; 43. Guide groove; 44. Guide block; 45. First rotating plate; 46. First sliding block; 47. First connecting shaft; 48. First sliding groove; 49. Second transmission shaft; 410. Second rotating plate; 411. Connecting plate; 412. Second sliding block; 413. Second connecting shaft; 414. Second sliding groove; 415. Swinging plate; 416. Tooth plate; 417. Reinforcement plate. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] like Figure 1 , Figure 4 , Figure 5 As shown. A high-temperature pyrolysis harmless treatment device for chemical waste salt includes a pyrolysis furnace 1, and the waste salt is harmlessly treated in the pyrolysis furnace 1. The pyrolysis furnace 1 includes a furnace body 11, and the furnace body 11 is fixed on the ground. A heat insulation layer is arranged on the furnace body 11, which can reduce the heat loss in the furnace body 11. A feed pipe 12 is arranged on the top of the furnace body 11 to facilitate the waste salt to enter the furnace body 11. A discharge pipe 13 is arranged at the bottom of the furnace body 11, and the treated waste salt is discharged from the furnace body 11 through the discharge pipe 13. An exhaust port for exhausting waste gas is arranged on the upper part of the furnace body 11, and a fan can be arranged at the exhaust port to discharge the volatilized or decomposed organic gas from the furnace body 11. A heating element is arranged on the side wall of the furnace body 11, and the heating element can be a heating wire or a heating rod. The heating element is arranged in the interlayer of the furnace body 11 to uniformly heat the furnace body 11. The interior of the furnace body 11 is made of high thermal conductivity material, so that heat can be fully transmitted to the interior of the furnace body 11.

[0025] A dispersing mechanism 2 for dispersing waste salt is provided inside the furnace body 11, and the dispersing mechanism 2 is located directly below the feed pipe 12. The dispersing mechanism 2 is used to disperse the waste salt so that the waste salt can be fully heated, promote the volatilization and decomposition of organic matter in the waste salt, which is beneficial to improve the removal effect of organic matter in the waste salt, and is beneficial to reduce the heating temperature of the waste salt. A uniform mechanism 3 for homogenizing the waste salt is provided inside the furnace body 11, and the uniform mechanism 3 is located below the dispersing mechanism 2. The uniform mechanism 3 is used to homogenize the waste salt, promote the volatilization or decomposition of organic matter, and realize the removal of organic matter in the waste salt.

[0026] The furnace body 11 is provided with a tuyere 19 for suspending the waste salt, and the tuyere 19 is connected to an external fan. The tuyere 19 is arranged obliquely upward, and the tuyere 19 is arranged on the inner wall of the furnace body 11 or the bottom of the furnace body 11, or can be arranged between two uniform mechanisms 3, to provide a certain suspension force for the waste salt, slow down the falling speed of the waste salt, and fully remove the organic matter contained in the waste salt. The falling speed of the waste salt can be achieved by controlling the size of the wind speed.

[0027] like Figure 7 As shown. The dispersion mechanism 2 includes a sleeve 21 and an inner rod 22, wherein the inner rod 22 is located inside the sleeve 21 and is rotatably connected to the sleeve 21. A spiral first dispersion blade 23 is fixedly provided at the bottom end of the sleeve 21, and the first dispersion blade 23 is distributed in a circumferential array at the bottom end of the sleeve 21. A spiral second dispersion blade 24 is fixedly provided at the bottom end of the inner rod 22, and the second dispersion blade 24 is distributed in a circumferential array at the bottom end of the inner rod 22. The width of the second dispersion blade 24 is greater than the width of the first dispersion blade 23, so that the second dispersion blade 24 can receive the waste salt thrown from the first dispersion blade 23. The spiral directions of the first dispersion blade 23 and the second dispersion blade 24 are opposite, and the first dispersion blade 23 and the second dispersion blade 24 both drive the waste salt to rotate and throw downward, so that the waste salt is fully dispersed, so that the waste salt is evenly thrown in the furnace body 11, which is convenient for fully removing organic matter in the waste salt.

[0028] like Figure 3 As shown. A rotating structure is provided on the furnace body 11 to drive the inner rod 22 and the outer tube to rotate in the opposite direction. The rotating structure includes a motor 211, and the motor 211 is fixedly arranged at the top of the furnace body 11. A second gear 210 is fixedly arranged on the output shaft of the motor 211, and the second gear 210 is meshed with a first gear 29 fixedly arranged on the first transmission shaft 28. The first transmission shaft 28 is rotatably connected to the furnace body 11 through a bearing seat, and the bearing seat is fixed on the furnace body 11. A third bevel gear 27 is fixedly arranged at one end of the first transmission shaft 28, and the third bevel gear 27 is located between the first bevel gear 25 and the second bevel gear 26. The third bevel gear 27 is meshed with both the first bevel gear 25 and the second bevel gear 26. The first bevel gear 25 is fixedly arranged at the top of the sleeve 21, and the second bevel gear 26 is fixedly arranged at the top of the inner rod 22.

[0029] The motor 211 drives the first transmission shaft 28 to rotate through the first gear 29 and the second gear 210, and the first transmission shaft 28 drives the first bevel gear 25 and the second bevel gear 26 to rotate through the third bevel gear 27, thereby driving the sleeve 21 and the inner rod 22 to rotate, and then driving the first dispersing blade 23 and the second dispersing blade 24 to rotate in the opposite direction, so that the waste salt is fully thrown into the furnace body 11.

[0030] like Figure 6 As shown. A conical feed plate 14 is fixedly arranged at the top of the furnace body 11, and the feed plate 14 has a guiding effect on the waste salt, so that the waste salt enters the dispersion mechanism 2 from the center of the furnace body 11. A fixed seat 16 is arranged at the middle of the bottom end of the feed plate 14, and the fixed seat 16 is fixedly connected to the feed plate 14 through a fixed plate 17. A feed port 18 for the waste salt to enter is formed between the fixed seat 16 and the feed plate 14. The sleeve 21 is rotatably connected to the fixed seat 16 through a bearing, and the sleeve 21 is rotatably connected to the furnace body 11 through a bearing and a sealing ring.

[0031] like Figure 8 As shown. The uniform mechanism 3 includes a first rotating shaft 31 and a second rotating shaft 34. The second rotating shaft 34 is arranged parallel to the first rotating shaft 31 and is located below the first rotating shaft 31. The first rotating shaft 31 and the second rotating shaft 34 are both connected to the furnace body 11 through bearings and sealing rings for sealing and rotation. A plurality of first uniform rods 32 and second uniform rods 33 are uniformly arranged in a circular array on the first rotating shaft 31. The first uniform rods 32 and the second uniform rods 33 are arranged at intervals. A plurality of rows of third uniform rods 35 and fourth uniform rods 36 are evenly arranged in a circular array on the second rotating shaft 34, and the third uniform rods 35 and the fourth uniform rods 36 are arranged at intervals. Fins 37 are fixedly arranged on the first uniform rod 32, the second uniform rod 33, the third uniform rod 35, and the fourth uniform rod 36, and the fins 37 on the first uniform rod 32 and the second uniform rod 33 overlap each other, and the fins 37 on the third uniform rod 35 and the fourth uniform rod 36 overlap each other. The first uniform rod 32 and the second uniform rod 33 are arranged at intervals, and the third uniform rod 35 and the fourth uniform rod 36 are arranged at intervals, so that the waste salt can fully contact the first uniform rod 32, the second uniform rod 33, the third uniform rod 35, the fourth uniform rod 36, and the fins 37, thereby improving the uniformity of the waste salt heating, promoting the volatilization and decomposition of organic matter in the waste salt, and improving the treatment effect of the waste salt.

[0032] like Figure 2As shown. The first rotating shaft 31 and the second rotating shaft 34 are connected by a reverse rotation structure. The reverse rotation structure includes a transmission gear 38, which is fixedly arranged at the end of the first rotating shaft 31 extending out of the furnace body 11. The transmission gear 38 is connected to the transmission mechanism 4, and the transmission gear 38 is driven to rotate by the transmission mechanism 4. An intermediate gear 39 is rotatably arranged on the outside of the furnace body 11 through a bearing, and the intermediate gear 39 is meshed with the transmission gear 38. A first transmission wheel 310 is fixedly arranged on the axle of the intermediate gear 39, and a second transmission wheel 311 is fixedly arranged at the end of the second rotating shaft 34 extending out of the furnace body 11, and the first transmission wheel 310 and the second transmission wheel 311 are connected by a transmission belt 312. The first rotating shaft 31 drives the second rotating shaft 34 to rotate in the opposite direction through the transmission gear 38, the intermediate gear 39, the first transmission wheel 310, the transmission belt 312 and the second transmission wheel 311.

[0033] The waste salt hits the first uniform rod 32, the second uniform rod 33, the third uniform rod 35, the fourth uniform rod 36 and the fins 37 during the falling process, thereby reducing the agglomeration of the waste salt and improving the removal of organic matter in the waste salt.

[0034] In order to improve the removal effect of organic matter in the waste salt, a plurality of uniform mechanisms 3 can be arranged in the furnace body 11 to improve the removal effect of organic matter.

[0035] A conical guide plate 15 is provided between the second dispersing blade 24 and the uniform mechanism 3, and the guide plate 15 is fixed on the inner wall of the furnace body 11. The guide plate 15 has a relatively large inclination angle, and guides the dispersed waste salt to the uniform mechanism 3 to avoid passing through the gap between the uniform mechanism 3 and the furnace body 11.

[0036] The dispersion mechanism 2 is connected to the uniform mechanism 3 through a transmission mechanism 4. The transmission mechanism 4 includes a transmission box 41, which is fixedly arranged on the furnace body 11. One end of the first transmission shaft 28 is inserted into the transmission box 41 and is rotatably connected to the transmission box 41 through a bearing. The first transmission shaft 28 is connected to the second transmission shaft 49 through a swing structure to achieve reciprocating rotation of the second transmission shaft 49. The second transmission shaft 49 is coaxially arranged with the first transmission shaft 28, and the second transmission shaft 49 is rotatably connected to the transmission box 41 through a bearing.

[0037] like Fig. 9 , Fig.10 , Fig.11As shown. The swing structure includes a transmission seat 42, and the transmission seat 42 is located inside the transmission box 41. Guide blocks 44 are provided at both ends of the transmission seat 42, and guide grooves 43 adapted to the guide blocks 44 are provided on the inner wall of the transmission box 41. The guide blocks 44 are located in the guide grooves 43 and are slidably connected with the guide grooves 43. The guide grooves 43 and the guide blocks 44 have a guiding effect on the up and down sliding of the transmission seat 42. A first slide groove 48 and a second slide groove 414 are provided inside the transmission seat 42, and a first slider 46 is slidably provided in the first slide groove 48. The first slider 46 is connected to the first rotating plate 45 through a first connecting shaft 47, and the first connecting shaft 47 is rotatably connected to the first rotating plate 45 and the first slider 46. The first rotating plate 45 is coaxially fixedly arranged at the end of the first transmission shaft 28. A second slider 412 is slidably disposed in the second slide groove 414. The second slider 412 is connected to the connecting plate 411 via a second connecting shaft 413. The second connecting shaft 413 is rotatably connected to the second slider 412 and the connecting plate 411. The connecting plate 411 is fixedly disposed on the second rotating plate 410, and the second rotating plate 410 is coaxially fixedly disposed on the second transmission shaft 49. The distance from the second connecting shaft 413 to the axis of the second transmission shaft 49 is greater than the distance from the first connecting shaft 47 to the axis of the first transmission shaft 28, so that the continuous rotation of the first slider 46 is converted into the reciprocating swing of the second slider 412.

[0038] One end of the second transmission shaft 49 located outside the transmission box 41 is connected to the transmission gear 38 through a transmission structure. The transmission structure includes a swing plate 415, and the top of the swing plate 415 is fixedly connected to the second transmission shaft 49. An arc-shaped tooth plate 416 is fixedly provided at the bottom end of the swing plate 415, and the center of the circle where the tooth plate 416 is located is located on the axis of the second transmission shaft 49. The tooth plate 416 is meshed with the transmission gear 38. Both sides of the first rotating plate 45 are connected to the two ends of the arc through reinforcing plates 417 to improve the stability of the swing of the tooth plate 416.

[0039] The treatment method based on the above-mentioned high-temperature pyrolysis harmless treatment device for chemical waste salt comprises the following steps: S1. Start the heating element to heat the furnace body 11. After the temperature of the furnace body 11 reaches the set temperature, the waste salt after drying is fed into the furnace body 11 through the feed pipe 12. The waste salt falls downward from the feed port 18 onto the first dispersing blade 23 under the guidance of the feed plate 14. The moisture content of the waste salt after drying is less than 10%.

[0040] S2, the motor 211 drives the second gear 210 to rotate, the second gear 210 drives the first transmission shaft 28 to rotate through the first gear 29, the first transmission shaft 28 drives the third bevel gear 27 to rotate, the third bevel gear 27 drives the first bevel gear 25 and the second bevel gear 26 to rotate in the opposite direction, the first bevel gear 25 and the second bevel gear 26 respectively drive the sleeve 21 and the inner rod 22 to rotate in the opposite direction, the waste salt on the first dispersing blade 23 slides along the first dispersing blade 23 under the action of centrifugal force and is thrown outward, the waste salt on the first dispersing blade 23 falls on the second dispersing blade 24, and the waste salt is further thrown under the action of the second dispersing blade 24 to disperse the waste salt.

[0041] S3, the first transmission shaft 28 drives the first rotating plate 45 to rotate, the first rotating plate 45 drives the first slider 46 to move through the first connecting shaft 47, the first slider 46 drives the transmission seat 42 to slide up and down along the guide groove 43 under the action of the first slide groove 48, and the first slider 46 slides back and forth in the first slide groove 48. The transmission seat 42 drives the second slider 412 to rise and fall through the second slide groove 414, the second slider 412 slides along the second slide groove 414 under the action of the connecting plate 411 and the second rotating plate 410, the second slider 412 drives the second transmission shaft 49 to rotate through the second connecting shaft 413, the connecting plate 411 and the second rotating plate 410, because the distance from the second connecting shaft 413 to the second transmission shaft 49 is greater than the distance from the first connecting shaft 47 to the first transmission shaft 28, the second slider 412 can only slide back and forth in part of the second slide groove 414, driving the second transmission shaft 49 to swing back and forth. The second transmission shaft 49 drives the tooth plate 416 to swing through the swing plate 415, the tooth plate 416 drives the transmission gear 38 to rotate back and forth, the transmission gear 38 drives the first rotating shaft 31 to rotate back and forth, the transmission gear 38 drives the first transmission wheel 310 to rotate back and forth in the opposite direction through the intermediate gear 39, the first transmission wheel 310 drives the first transmission wheel 310 to rotate back and forth through the transmission belt 312, and the first transmission wheel 310 drives the second rotating shaft 34 to rotate back and forth in the opposite direction.

[0042] S4. The dispersed waste salt is heated in the furnace body 11 and falls on the first uniform rod 32, the second uniform rod 33 and the fin 37 of the uniform mechanism 3, and the waste salt is stirred and dispersed. After passing through the first rotating shaft 31, the waste salt falls on the third uniform rod 35, the fourth uniform rod 36 and the fin 37 on the second rotating shaft 34, and the waste salt is further stirred and dispersed. The fan blows air into the furnace body 11 through the air nozzle 19 to extend the falling speed of the waste salt, so that the organic matter contained in the waste salt is fully volatilized or decomposed into gas, and the organic gas is discharged through the exhaust port set at the top of the furnace body 11 for subsequent treatment, which can be incineration or collection of the organic gas. The treated waste salt is discharged from the furnace body 11 through the discharge port under the action of gravity.

[0043] The temperature in the furnace body 11 is 200° C.-600° C., which realizes the decomposition and volatilization of organic matter and the harmless treatment of waste salt at a relatively low temperature.

[0044] Therefore, the high-temperature pyrolysis harmless treatment device and method for chemical waste salt described in the present invention can solve the problem of high incineration temperature of waste salt during incineration treatment and easy agglomeration and slagging of waste salt, thereby achieving harmless treatment of waste salt.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A high-temperature pyrolysis and harmless treatment device for chemical waste salt, characterized in that: The invention comprises a pyrolysis furnace, which comprises a furnace body, a feed pipe is arranged on the top of the furnace body, a discharge pipe is arranged on the bottom of the furnace body, an exhaust port for exhausting waste gas is arranged on the upper part of the furnace body, and a heating element is arranged on the side wall of the furnace body; a dispersion mechanism for dispersing waste salt is arranged inside the furnace body, the dispersion mechanism is located directly below the feed pipe, a uniform mechanism for uniformizing waste salt is arranged inside the furnace body, the uniform mechanism is located below the dispersion mechanism, and the dispersion mechanism and the uniform mechanism are connected by a transmission mechanism; and a tuyere is arranged inside the furnace body for suspending waste salt.

2. The high-temperature pyrolysis harmless treatment device for chemical waste salt according to claim 1 is characterized by: The dispersion mechanism includes a sleeve and an inner rod, the inner rod is located inside the sleeve and is rotatably connected to the sleeve, a first spiral dispersion blade is arranged at the bottom end of the sleeve, the first dispersion blade is distributed in a circular array at the bottom end of the sleeve, a second spiral dispersion blade is arranged at the bottom end of the inner rod, the second dispersion blade is distributed in a circular array at the bottom end of the inner rod, the width of the second dispersion blade is greater than the width of the first dispersion blade, and the spiral directions of the first dispersion blade and the second dispersion blade are opposite; a rotating structure is arranged on the furnace body to drive the inner rod and the outer tube to rotate in opposite directions.

3. A high-temperature pyrolysis harmless treatment device for chemical waste salt according to claim 2, characterized in that: The rotating structure includes a motor, which is arranged at the top of the furnace body. A second gear is arranged on the output shaft of the motor, and the second gear is meshed with the first gear arranged on the first transmission shaft. The first transmission shaft is rotatably connected to the furnace body. A third bevel gear is arranged at one end of the first transmission shaft, and the third bevel gear is located between the first bevel gear and the second bevel gear. The third bevel gear is meshed with the first bevel gear and the second bevel gear. The first bevel gear is arranged at the top of the sleeve, and the second bevel gear is arranged at the top of the inner rod; the other end of the first transmission shaft is connected to the transmission mechanism.

4. The high-temperature pyrolysis harmless treatment device for chemical waste salt according to claim 3 is characterized by: A conical feed plate is provided at the inner top of the furnace body, a fixed seat is provided at the middle of the bottom end of the feed plate, the fixed seat is connected to the feed plate through the fixed plate, a feed port for waste salt to enter is formed between the fixed seat and the feed plate, the sleeve is rotatably connected to the fixed seat, and the sleeve is rotatably connected to the furnace body; A conical material guide plate is arranged between the second dispersing blade and the uniform mechanism, and the material guide plate is fixed on the inner wall of the furnace body.

5. The high-temperature pyrolysis harmless treatment device for chemical waste salt according to claim 4 is characterized by: The uniform mechanism includes a first rotating shaft and a second rotating shaft, the second rotating shaft is arranged parallel to the first rotating shaft, the second rotating shaft is located below the first rotating shaft, and the first rotating shaft and the second rotating shaft are both rotatably connected to the furnace body; a plurality of rows of first uniform rods and second uniform rods are evenly arranged in a circular array on the first rotating shaft, and the first uniform rods and the second uniform rods are arranged at intervals; a plurality of rows of third uniform rods and fourth uniform rods are evenly arranged in a circular array on the second rotating shaft, and the third uniform rods and the fourth uniform rods are arranged at intervals; fins are arranged on the first uniform rod, the second uniform rod, the third uniform rod and the fourth uniform rod; the first rotating shaft and the second rotating shaft are connected by a reverse rotation structure.

6. The high-temperature pyrolysis harmless treatment device for chemical waste salt according to claim 5 is characterized by: The reverse rotation structure includes a transmission gear, which is arranged at one end of the first rotating shaft extending out of the furnace body, and the transmission gear is connected to the transmission mechanism. An intermediate gear is arranged for external rotation of the furnace body, and the intermediate gear is meshed with the transmission gear. A first transmission wheel is arranged on the axle of the intermediate gear, and a second transmission wheel is arranged at one end of the second rotating shaft extending out of the furnace body. The first transmission wheel and the second transmission wheel are connected by a transmission belt.

7. The high-temperature pyrolysis harmless treatment device for chemical waste salt according to claim 6 is characterized by: The transmission mechanism includes a transmission box, which is arranged on the furnace body. One end of the first transmission shaft is inserted into the transmission box and is rotatably connected to the transmission box. The first transmission shaft is connected to the second transmission shaft through a swing structure. The second transmission shaft is coaxially arranged with the first transmission shaft, and the second transmission shaft is rotatably connected to the transmission box. One end of the second transmission shaft located outside the transmission box is connected to the transmission gear through a transmission structure.

8. The high-temperature pyrolysis harmless treatment device for chemical waste salt according to claim 7, characterized in that: The swing structure includes a transmission seat, the transmission seat is located inside the transmission box, guide blocks are arranged at both ends of the transmission seat, guide grooves adapted to the guide blocks are arranged on the inner wall of the transmission box, the guide blocks are located in the guide grooves and are slidably connected to the guide grooves, the guide grooves and the guide blocks have a guiding effect on the up and down sliding of the transmission seat, the transmission seat is provided with a first slide groove and a second slide groove in parallel, a first slider is slidably arranged in the first slide groove, the first slider is connected to the first rotating plate through a first connecting shaft, the first connecting shaft and the first rotating plate and the first slider are all rotatably connected, the first rotating plate is coaxially arranged at the end of the first transmission shaft, a second slider is slidably arranged in the second slide groove, the second slider is connected to the connecting plate through the second connecting shaft, the second connecting shaft and the second slider and the connecting plate are all rotatably connected, the connecting plate is arranged on the second rotating plate, and the second rotating plate is coaxially arranged on the second transmission shaft; the distance from the second connecting shaft to the axis of the second transmission shaft is greater than the distance from the first connecting shaft to the axis of the first transmission shaft.

9. The high-temperature pyrolysis harmless treatment device for chemical waste salt according to claim 8, characterized in that: The transmission structure includes a swing plate, the top of which is fixedly connected to the second transmission shaft, the bottom of which is provided with an arc-shaped tooth plate, the center of the circle where the tooth plate is located is located on the axis of the second transmission shaft, the tooth plate is meshed with the transmission gear, and the two sides of the first rotating plate are connected to the two ends of the arc through a reinforcing plate.

10. A treatment method based on the high-temperature pyrolysis harmless treatment device for chemical waste salt according to claim 9, characterized in that: The following steps are involved: S1, start the heating element to heat the furnace body, feed the dried waste salt into the furnace body through the feed pipe, and the waste salt falls downward from the feed port onto the first dispersing blade under the guidance of the feed plate; S2, the motor drives the second gear to rotate, the second gear drives the first transmission shaft to rotate through the first gear, the first transmission shaft drives the third bevel gear to rotate, the third bevel gear drives the first bevel gear and the second bevel gear to rotate in the opposite direction, the first bevel gear and the second bevel gear respectively drive the sleeve and the inner rod to rotate in the opposite direction, the waste salt on the first dispersing blade slides along the first dispersing blade under the action of centrifugal force and is thrown outward, the waste salt on the first dispersing blade falls on the second dispersing blade, and the waste salt is further thrown under the action of the second dispersing blade to disperse the waste salt; S3, the first transmission shaft drives the first rotating plate to rotate, the first rotating plate drives the first slider to move through the first connecting shaft, the first slider drives the transmission seat to slide up and down along the guide groove under the action of the first slide groove, and the first slider slides back and forth in the first slide groove; the transmission seat drives the second slider to rise and fall through the second slide groove, and the second slider slides along the second slide groove under the action of the connecting plate and the second rotating plate, and the second slider drives the second transmission shaft to rotate through the second connecting shaft, the connecting plate and the second rotating plate. Since the distance from the second connecting shaft to the second transmission shaft is greater than the distance from the first connecting shaft to the first transmission shaft, the second slider can only slide back and forth in part of the second slide groove, driving the second transmission shaft to swing; the second transmission shaft drives the toothed plate to swing through the swinging plate, the toothed plate drives the transmission gear to rotate reciprocatingly, the transmission gear drives the first rotating shaft to rotate reciprocatingly, the transmission gear drives the first transmission wheel to rotate reversely through the intermediate gear, the first transmission wheel drives the first transmission wheel to rotate reciprocatingly through the transmission belt, and the first transmission wheel drives the second rotating shaft to rotate reversely; S4. The dispersed waste salt is heated in the furnace body and falls on the first uniform rod, the second uniform rod and the fins of the uniform mechanism to stir and disperse the waste salt; the waste salt passes through the first rotating shaft and falls on the third uniform rod, the fourth uniform rod and the fins on the second rotating shaft to further stir and disperse the waste salt; the fan blows air into the furnace body through the air nozzle to extend the descending speed of the waste salt, so that the organic matter contained in the waste salt is fully volatilized or decomposed into gas, and the organic gas is discharged through the exhaust port set on the upper part of the furnace body for subsequent treatment, and the treated waste salt is discharged from the furnace body through the discharge port under the action of gravity.

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