Multifunctional equipment and method for treating industrial waste salt

Abstract

This invention proposes a multifunctional industrial waste salt treatment device and method, comprising an inclined waste salt treatment cylinder. Bearings are rotatably connected to both sides of the outer wall of the waste salt treatment cylinder, and sealing baffles are fixedly connected to the sides of the bearings that are far apart from each other. A rotating mechanism is provided on the waste salt treatment cylinder to enable its circumferential rotation. Multiple horizontally arranged spiral feeding plates are provided on the inner wall of the waste salt treatment cylinder to move the internal heat carrier from a low horizontal position to a high horizontal position. The sides of two horizontally adjacent spiral feeding plates overlap longitudinally but are separated laterally. This invention uses a continuously upward-moving high-temperature heat carrier to exchange heat with the continuously downward-moving waste salt, forming multiple temperature zones. This gradually refines the waste salt containing different impurities, resulting in fully refined waste salt, and prevents the problem of waste salt sticking to the waste salt treatment tank.

Description

Technical Field

[0001] The invention relates to the field of waste salt treatment, and in particular to a multifunctional industrial waste salt treatment device and a treatment method. Background Art

[0002] The main directions of waste salt treatment are: directly sending it to landfill or making it harmless through appropriate pre-treatment technology before landfill or discharge into the sea; purifying and recycling the inorganic salts in it for reuse. Common waste salt treatment technologies include heat treatment, salt washing, oxidation, recrystallization, membrane separation, soda ash production, direct utilization and other technologies.

[0003] Thermal treatment uses high temperature to gasify and decompose organic matter to achieve the purpose of inorganic salt purification. This method is very suitable for treating waste salt with more organic impurities. Usually the organic matter removal rate can reach more than 99%.

[0004] The salt washing method is a method to separate the components according to their different solubility in the solvent. By selecting the appropriate volume, the purpose of removing heavy metals or organic matter from the waste salt can be achieved.

[0005] Oxidation is a treatment method that uses oxidants to oxidize organic impurities in waste salt to purify inorganic salts. Commonly used oxidants include sodium hypochlorite, hydrogen peroxide, ozone, etc. The oxidation method is suitable for waste salts with few organic impurities and easy to oxidize. It will not cause secondary pollution and will not introduce new impurities after the reaction. The amount of oxidant required for the treatment of waste salts with high organic content and difficult to oxidize is large. Sometimes it is necessary to increase the oxidizing property of the oxidant by heating and pressurizing, and to treat the oxidation residues with activated carbon, which undoubtedly increases environmental risks and economic investment. The treatment effect of the oxidation method is closely related to the nature of the organic matter, and the types of organic matter in the waste salts produced by different products and different production processes are very different, which makes it difficult to determine the operating parameters such as dosage and treatment time, and its application is limited.

[0006] Recrystallization is a method of separating and purifying salt by dissolving a mixed salt containing one or more impurity salts in water, and then saturating one of the components and crystallizing it by changing the temperature or evaporating the water. Recrystallization is widely used in the production of inorganic salts. The premise is to remove impurities such as organic matter in the waste salt.

[0007] Membrane salt separation is a method of using nanofiltration membranes or ion exchange membranes to intercept divalent ions such as calcium, magnesium, and sulfate, while allowing monovalent ions such as sodium and chloride to pass through, thereby separating monovalent salts from high-valent salts. Membrane treatment of waste salt needs to be combined with crystallization technology, and membrane separation can be considered a pretreatment process for crystallization.

[0008] The soda ash production method is a waste salt resource utilization method that uses waste salt as raw material to produce sodium carbonate. It is mainly suitable for waste salt containing sodium chloride and sodium sulfate.

[0009] In addition to being processed and recycled to meet relevant standards and sold as products, certain non-toxic and harmless industrial waste salts can also be directly used in the production process.

[0010] Solid waste pyrolysis has been used in actual industrial applications for nearly 20 years. Among them, high-temperature pyrolysis has a longer history and more mature technology. However, high-temperature pyrolysis equipment is very expensive, and the technology is currently only used in small-scale solid waste disposal. The large-scale use of low-temperature pyrolysis has a history of less than 10 years. Low-temperature pyrolysis equipment is simple, with low investment, and the pyrolysis products produced have higher heat than high-temperature pyrolysis, and have been increasingly favored by the solid waste disposal industry. However, during use, due to the complex composition of waste salts and the presence of some impurities, the melting point of waste salts is often low, resulting in waste salts sticking to the equipment during the pyrolysis process, which can easily cause the equipment to get stuck, severely limiting the stable operation of waste salt pyrolysis equipment. Therefore, there is an urgent need to develop a pyrolysis equipment that is suitable for low-melting-point salts. Summary of the invention

[0011] The technical problem to be solved by the present invention is to overcome the defects of the prior art. The present invention proposes a multifunctional treatment device and a treatment method for industrial waste salt.

[0012] In order to solve the above technical problems, the technical solution adopted by the present invention is: a multifunctional industrial waste salt treatment equipment, comprising an inclined waste salt treatment cylinder, on which a running mechanism for making it rotate in a circle is arranged;

[0013] The inner wall of the waste salt treatment cylinder is provided with a plurality of spiral feeding plates arranged horizontally to move the heat carrier containing high temperature inside from a low level position to a high level position. The sides of two horizontally adjacent spiral feeding plates close to each other overlap in the longitudinal direction and are isolated from each other in the transverse direction. A spiral baffle is provided at the end of the spiral feeding plate. The spiral feeding plate is provided with a leakage hole, and the diameter of the leakage hole is smaller than the diameter of the heat carrier.

[0014] It also includes a loading mechanism for inputting the heat carrier with a preset high temperature into a low level position of the waste salt treatment cylinder.

[0015] Further, the feeding mechanism comprises a material transfer pipe connected to the high level position of the waste salt treatment barrel, the end of the material transfer pipe away from the waste salt treatment barrel is connected to a heating box for transferring the heat carrier removed from the waste salt treatment barrel to the heating box for heating, the waste salt treatment barrel is connected to a second material discharge pipe at a low level, the end of the second material discharge pipe away from the waste salt treatment barrel is connected to the material transfer pipe for transferring the removed waste salt to the material transfer pipe, and a mesh is provided at a portion of the material transfer pipe where both the heat carrier and the waste salt pass through to screen out the waste salt to the outside, and the aperture of the mesh is smaller than the diameter of the heat carrier;

[0016] One side of the heating box is connected to a first discharge pipe, and the side of the first discharge pipe away from the heating box is arranged at the feed port of the screw feeder for transferring the heated heat carrier to the screw feeder. The discharge port of the screw feeder is provided with a delivery pipe, and one end of the delivery pipe away from the screw feeder is arranged at a low level position of the waste salt treatment cylinder for transferring the heated heat carrier to the low level position of the waste salt treatment cylinder.

[0017] Furthermore, bearings are rotatably connected to the left and right sides of the outer wall of the waste salt treatment cylinder, and sealing baffles are fixedly connected to the sides of the two bearings that are away from each other. The material transfer pipe passes through the sealing baffle with a high horizontal position, and the second material discharge pipe passes through the sealing baffle with a low horizontal position.

[0018] Furthermore, the operating mechanism includes a reduction motor, a second gear is fixedly installed on the power output end of the reduction motor, a first gear is fixedly connected to the outer wall of the waste salt treatment cylinder, and the second gear is meshed with the first gear to drive the waste salt treatment cylinder to rotate in a circle;

[0019] It also includes at least two auxiliary shaft rings. The outer wall of the waste salt treatment cylinder is fixedly connected with auxiliary support shaft rings with the same number as the auxiliary shaft rings. The auxiliary support shaft rings are rotatably connected in the auxiliary shaft rings.

[0020] Furthermore, a plurality of spiral feeding plates are radially arranged in the waste salt treatment cylinder.

[0021] Furthermore, it also includes a support plate installed on the ground, on which the screw feeder is fixed via a connecting plate, and the auxiliary shaft sleeve and the reduction motor are both fixed on the top of the support plate.

[0022] Furthermore, a waste salt input pipe for inputting waste salt from the outside is connected to the sealing baffle at a high level, and the waste salt input pipe is provided with a sealing door.

[0023] Furthermore, the waste salt treatment cylinder is connected to a first air outlet pipe, the side of the first air outlet pipe away from the waste salt treatment cylinder is connected to a combustion box, the combustion box is connected to a second air outlet pipe, and the end of the second air outlet pipe away from the combustion box is connected to the heating box.

[0024] Furthermore, the first air outlet pipe and the second air outlet pipe are both provided with a gas backflow prevention device.

[0025] A multifunctional method for treating industrial waste salt comprises the following steps:

[0026] Step 1: Set the waste salt treatment barrel to an inclined shape, then add the high-temperature heat carrier to the feed port of the screw feeder, start the power of the screw feeder, and transfer the high-temperature heat carrier to the lower level position of the sealed waste salt treatment barrel through the feed pipe;

[0027] Step 2: Start the power of the heating box, and input the waste salt from the outside into the high level position of the waste salt treatment cylinder through the waste salt input pipe;

[0028] Step 3: Start the power supply of the reduction motor, the reduction motor drives the second gear to rotate, and the second gear meshes with the first gear to make the waste salt treatment barrel rotate in a circle. At this time, multiple spiral feeding plates move the high-temperature heat carrier from a low level position to a high level position. When the heat carrier moves to the end of a single spiral feeding plate, it follows the spiral baffle to rotate in a circle for a preset distance and then falls onto the next spiral feeding plate. The falling heat carrier smashes the waste salt; the waste salt moves from the high level position of the waste salt treatment barrel to the second discharge pipe at a low level position along with the tilted waste salt treatment barrel and the leakage hole; and the heat carrier continuously exchanges heat with the waste salt moving downward during the upward movement, so that the waste salt moves to the low level position. During the horizontal transmission, the temperature gradually increases to form multiple temperature zones, and the waste salt with various impurities is refined; the high-temperature waste salt moves from the second discharge pipe to the transfer pipe, and the heat carrier that continuously moves upward moves to the transfer pipe. At this time, the high-temperature salt and the low-temperature heat carrier that has been removed from the waste salt treatment cylinder exchange heat. After the heat exchange is completed, the waste salt is removed through the filter and collected through the collection box. At this time, the heat carrier enters the heating box for reheating. The heat carrier that has finished heating moves to the first discharge pipe under the cooperation of gravity. The heat carrier in the first discharge pipe enters the spiral feeder and is again transferred to the low-level position in the waste salt treatment cylinder through the conveying pipe with the reheated heat carrier.

[0029] Step 4: Start the power supply of the combustion box, and the gas decomposed in the waste salt treatment cylinder moves from the first outlet pipe to the combustion box for combustion. The combustion box transmits the hot gas after combustion to the heating box to heat the heat carrier, thereby maximizing the utilization of thermal energy.

[0030] Compared with the prior art, the beneficial effects of the present invention include: the high-temperature heat carrier that continuously moves upward exchanges heat with the waste salt that continuously moves downward, forming multiple temperature zones, gradually refining the waste salt containing different impurities, thereby obtaining completely refined waste salt, and preventing the problem of waste salt sticking to the waste salt treatment box;

[0031] The upward-moving heat carrier will fall down to break up the agglomerated waste salt after each distance it moves. The broken waste salt is convenient for subsequent collection and is also conducive to high-temperature refining of the waste salt.

[0032] The leakage holes also prevent the accumulated waste salt from falling to the outside, which greatly promotes and improves the overall process of the device;

[0033] The set transfer pipe exchanges heat between the refined high-temperature salt and the cold heat carrier, maximizing the use of heat and greatly saving resources;

[0034] The spiral feeder allows the heat carrier to be continuously recycled, and the heating box ensures that there is always a high-temperature heat carrier to heat the waste salt.

[0035] The combustion box can burn the gas generated by impurities and transfer the heat to the already cold heat carrier, which greatly saves resources. The combustion of exhaust gas greatly reduces the pollution of exhaust gas to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0037] Figure 1 A schematic diagram of a waste salt treatment structure proposed according to an embodiment of the present invention is shown;

[0038] Figure 2 A schematic diagram of an impurity gas combustion structure proposed according to an embodiment of the present invention is shown;

[0039] Figure 3 A schematic diagram of the radial structure of a waste salt treatment cylinder according to one embodiment of the present invention is shown;

[0040] Figure 4 The schematic diagram of the spiral feeding structure proposed according to one embodiment of the present invention is shown schematically.

[0041] Numbers in the figure: 1. Waste salt treatment cylinder; 2. First gear; 3. Bearing; 4. Sealing baffle; 5. Auxiliary support shaft ring; 6. Feed pipe; 7. Transfer pipe; 8. Second gear; 9. Reducer motor; 10. Screw feeder; 11. Heating box; 12. First discharge pipe; 13. Collecting box; 14. Leakage net; 15. Second discharge pipe; 16. Auxiliary shaft ring; 17. Waste salt input pipe; 18. Support plate; 19. Spiral baffle; 20. Spiral feeding plate; 21. Leakage hole; 22. First outlet pipe; 23. Combustion box; 24. Second outlet pipe. DETAILED DESCRIPTION

[0042] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0043] According to one embodiment of the present invention, Figure 1 A multifunctional industrial waste salt treatment device includes an inclined waste salt treatment barrel 1, on which a running mechanism for making the waste salt treatment barrel 1 rotate in a circle is arranged;

[0044] The inner wall of the waste salt treatment cylinder 1 is provided with a plurality of spiral feeding plates 20 arranged horizontally to move the heat carrier containing high temperature inside from a low level position to a high level position. The sides of two horizontally adjacent spiral feeding plates 20 close to each other overlap in the longitudinal direction and are isolated from each other in the transverse direction. A spiral baffle 19 is provided at the end of the spiral feeding plate 20; the spiral feeding plate 20 is provided with a leak hole 21, and the diameter of the leak hole 21 is smaller than the diameter of the heat carrier;

[0045] It also includes a feeding mechanism for inputting a heat carrier with a preset high temperature into the low level position of the waste salt treatment barrel 1. The waste salt treatment barrel 1 is tilted at 2 to 5 degrees. The feeding mechanism inputs the high-temperature heat carrier into the low level position of the waste salt treatment barrel 1. With the cooperation of the operating mechanism, the waste salt treatment barrel 1 rotates in a circle. Multiple spiral feeding plates 20 move the high-temperature heat carrier from the low level position of the waste salt treatment barrel 1 to the high level position. Waste salt is poured into the high level position of the spiral feeding plate 20. The inclined waste salt treatment barrel 1 cooperates with the leak hole 21 of the spiral feeding plate 20 to move the waste salt from the high level position to the low level position. The high-temperature heat carrier and the low-temperature heat carrier contact in opposite directions for heat exchange, and they are all continuous states, which will cause the waste salt moving downward to form multiple temperature zones, and the temperature of the multiple temperature zones is gradually increased, and the waste salt with multiple impurities can be gradually decomposed to obtain refined waste salt. The multiple temperature zones can be divided into a drying section, a low-temperature pyrolysis section, a medium-temperature pyrolysis section, and a high-temperature heat stage. In addition, when the heat carrier is transported by the multiple spiral feeding plates 20, the heat carrier will generate a falling impact force to break the waste salt. The waste salt is broken during the process of removing impurities. The process is integrated and the experimental effect is significant. The temperature zone with gradually increasing temperature also avoids the problem that the waste salt with different impurities directly melts and sticks to the inner wall of the waste salt treatment cylinder 1 when heated.

[0046] Specifically, the feeding mechanism includes a feeding pipe 7 connected to the high level position of the waste salt treatment barrel 1, and the end of the feeding pipe 7 away from the waste salt treatment barrel 1 is connected to the heating box 11 for transferring the heat carrier removed from the waste salt treatment barrel 1 to the heating box 11 for heating, and the low level position of the waste salt treatment barrel 1 is connected to a second discharge pipe 15, and the end of the second discharge pipe 15 away from the waste salt treatment barrel 1 is connected to the feeding pipe 7 for transferring the removed waste salt to the feeding pipe 7, and the part of the feeding pipe 7 where the heat carrier and the waste salt are passed at the same time is provided with a leakage net 14 for screening the waste salt to the outside, and the aperture of the leakage net 14 is smaller than the diameter of the heat carrier;

[0047] One side of the heating box 11 is connected to a first discharge pipe 12. The first discharge pipe 12 is arranged at the feeding port of the screw feeder 10 away from the heating box 11 to transfer the heated heat carrier to the screw feeder 10. The discharge port of the screw feeder 10 is provided with a conveying pipe 6. The end of the conveying pipe 6 away from the screw feeder 10 is arranged at a low level position of the waste salt treatment cylinder 1 to transfer the heated heat carrier to the low level position of the waste salt treatment cylinder 1. The crushed high-temperature waste salt will enter the second discharge pipe 15, and enter the transfer pipe 7 from the second discharge pipe 15. At this time, the heat carrier moving upward enters the transfer pipe 7. The heat of the high-temperature waste salt and the already cold heat carrier is exchanged with each other, and the heat of the waste salt that does not need to be heated again is transferred to the heat carrier, so as to make full use of the heat of the device. After exchanging the heat of the waste salt, the waste salt leaks out from the leakage net 14 and is collected by the external collection box. At this time, the heat carrier is heated by the heating box 11 and enters the feeding port of the spiral feeder 10. The feeder 10 transfers the heat carrier to the feeding pipe 6 and enters the low level position of the waste salt treatment cylinder 1. The above actions are repeated continuously to collect a large amount of refined salt. The heat carrier is continuously reused to refine the waste salt, which deepens the use of existing resources and greatly saves costs.

[0048] Specifically, the left and right sides of the outer wall of the waste salt treatment cylinder 1 are rotatably connected with bearings 3, and the sides of the two bearings 3 that are away from each other are fixedly connected with sealing baffles 4, the material transfer pipe 7 passes through the sealing baffle 4 with a high horizontal position, and the second discharge pipe 15 passes through the sealing baffle 4 with a low horizontal position. The two sealing baffles 4 are set so that the temperature of the heat carrier is absorbed by the waste salt to the maximum extent, reducing the loss of heat. And the device is almost not affected by the external environment.

[0049] Specifically, as shown in Figure 2, the operating mechanism includes a reduction motor 9, a second gear 8 is fixedly installed at the power output end of the reduction motor 9, a first gear 2 is fixedly connected to the outer wall of the waste salt treatment barrel 1, and the second gear 8 is meshed with the first gear 2 to drive the waste salt treatment barrel 1 to rotate in a circle. It also includes at least two auxiliary shaft rings 16, and the outer wall of the waste salt treatment barrel 1 is fixedly connected with auxiliary support shaft rings 5 ​​with the same number as the auxiliary shaft rings 16, and the auxiliary support shaft rings 5 ​​are rotatably connected in the auxiliary shaft rings 16. The power supply of the reduction motor 9 is started to drive the second gear 8 to rotate, and the second gear 8 rotates the waste salt treatment barrel 1 in a circle through meshing with the first gear 2. The use of the auxiliary circumferential ring 16 and the auxiliary support shaft ring 5 allows the waste salt treatment barrel 1 to rotate in a stable circle.

[0050] Specifically, Figure 1 As shown, a plurality of spiral feeding plates 20 are arranged radially on the waste salt treatment cylinder 1. The plurality of spiral feeding plates 20 arranged radially enable the heat carrier to move upward better and can crush the waste salt better.

[0051] Specifically, Figure 1 As shown, it also includes a support plate 18 installed on the ground, the screw feeder 10 is fixed on the support plate 18 through a connecting plate, and the auxiliary shaft ring 16 and the reduction motor 9 are fixed on the top of the support plate 18. The setting of the support plate 18 makes the device integrated and convenient for overall installation.

[0052] Specifically, Figure 1 As shown, the sealing baffle 4 at a high level is connected with a waste salt input pipe 17 for inputting waste salt from the outside, and the waste salt input pipe 17 is provided with a sealing door. It is convenient for the outside to input waste salt, and the outside uses a spiral feeder to load the waste salt.

[0053] Specifically, Figure 2 As shown, the waste salt treatment cylinder 1 is connected to a first gas outlet pipe 22, and the first gas outlet pipe 22 is connected to a combustion box 23 at a side away from the waste salt treatment cylinder 1, and the combustion box 23 is connected to a second gas outlet pipe 24, and the second gas outlet pipe 24 is connected to the heating box 11 at one end away from the combustion box 23. The gas decomposed by the impurities is burned, and the heat generated by the combustion can be transferred to the heating box 11 to heat the heat carrier, making full use of the heat of the device.

[0054] Specifically, Figure 1 As shown, both the first gas outlet pipe 22 and the second gas outlet pipe 24 are provided with a gas backflow prevention device to prevent gas backflow from damaging the life of the device.

[0055] A multifunctional method for treating industrial waste salt comprises the following steps:

[0056] Step 1: Set the waste salt treatment barrel 1 to an inclined shape, then add a high-temperature heat carrier to the feed port of the screw feeder 10, start the power supply of the screw feeder 10, and transfer the high-temperature heat carrier to the lower level position of the sealed waste salt treatment barrel 1 through the feed pipe 6;

[0057] Step 2: Start the power supply of the heating box 11, and input the waste salt from the outside into the high level position in the waste salt treatment cylinder 1 through the waste salt input pipe 17;

[0058] Step 3: Start the power supply of the reduction motor 9, the reduction motor 9 drives the second gear 8 to rotate, and the second gear 8 makes the waste salt treatment barrel 1 rotate in a circle through the meshing action with the first gear 2. At this time, multiple spiral loading plates 20 move the high-temperature heat carrier from a low level position to a high level position. When the heat carrier moves to the end of a single spiral loading plate 20, it follows the spiral baffle 19 to rotate in a circle for a preset distance and then falls on the next spiral loading plate 20. The falling heat carrier smashes the waste salt; the waste salt moves from the high level position of the waste salt treatment barrel 1 to the second discharge pipe 15 at a low level position as the waste salt treatment barrel 1 is tilted and cooperates with the leakage hole 21; and the heat carrier continuously exchanges heat with the waste salt moving downward during the upward movement, so that the waste salt moves upward. During the transmission process at the low level, the temperature gradually increases, forming multiple temperature zones, and the waste salt with various impurities is refined; the high-temperature waste salt moves from the second discharge pipe 15 to the transfer pipe 7, and the heat carrier that continuously moves upward moves to the transfer pipe 7. At this time, the high-temperature salt and the low-temperature heat carrier removed from the waste salt treatment cylinder 1 perform heat exchange. After the heat exchange is completed, the waste salt is removed through the filter 14 and collected through the collection box 13. At this time, the heat carrier enters the heating box 11 for reheating. The heat carrier that has finished heating moves to the first discharge pipe 12 under the cooperation of gravity. The heat carrier in the first discharge pipe 12 enters the spiral feeder 10, and the reheated heat carrier is transferred to the low level position in the waste salt treatment cylinder 1 through the conveying pipe 6 again;

[0059] Step 4: Start the power supply of the combustion box 23, and the gas decomposed in the waste salt treatment cylinder 1 moves from the first outlet pipe 22 to the combustion box 23 for combustion. The combustion box 23 transmits the hot gas after combustion to the heating box 11 to heat the heat carrier, thereby maximizing the utilization of thermal energy.

[0060] Three specific embodiments:

[0061] Example 1

[0062] For industrial sodium chloride waste salt, the melting point of the waste salt is 750-800℃, and the moisture content is 10%. The waste salt passes through the drying section, low-temperature pyrolysis section, medium-temperature pyrolysis section, and high-temperature pyrolysis section in sequence. The temperature of the high-temperature pyrolysis section is set at 700℃, and the heat carrier is mullite with a particle size of 20mm. The device has an inclination angle of 3%, a rotation speed of 2r / min, and a waste salt residence time of 45min.

[0063] After pyrolysis, the removal rate of organic matter in waste salt reaches more than 99%.

[0064] Example 2

[0065] For industrial potassium chloride waste salt, the melting point of waste salt is 700-720℃, and the moisture content is 5%. The waste salt passes through the drying section, low-temperature pyrolysis section, medium-temperature pyrolysis section, and high-temperature pyrolysis section in sequence. The temperature of the high-temperature pyrolysis section is set at 650℃, and the heat carrier is made of corundum with a particle size of 10mm. The device has an inclination angle of 2%, a rotation speed of 1r / min, and a waste salt residence time of 70min.

[0066] After pyrolysis, the removal rate of organic matter in waste salt reaches more than 99%.

[0067] Example 3

[0068] For industrial aluminum sulfate waste salt, the melting point of the waste salt is 200-300℃, and the moisture content is 15%. The waste salt passes through the drying section, low-temperature pyrolysis section, medium-temperature pyrolysis section, and high-temperature pyrolysis section in sequence. The temperature of the high-temperature pyrolysis section is set at 550℃, and the heat carrier is high-aluminum with a particle size of 8mm. The device has an inclination angle of 2%, a rotation speed of 1r / min, and a waste salt residence time of 90min.

[0069] After pyrolysis, the removal rate of organic matter in waste salt reaches more than 99%.

[0070] In this embodiment, a high-temperature heat carrier is added to the feeding port of the spiral feeder 10, and enters the low-level position of the waste salt treatment tube 1 through the spiral feeder 10, and then the waste salt is input into the high-level position of the waste salt treatment tube 1 through the external spiral feeder, and the power supply of the reduction motor 9 is started to drive the second gear 8 to rotate, and the second gear 8 makes the waste salt treatment tube 1 rotate in a circle through the meshing action with the first gear 2. At this time, multiple spiral feeding plates 20 move the high-temperature heat carrier from the low-level position of the waste salt treatment tube 1 to the high-level position, and the inclined waste salt treatment tube 1 cooperates with the leakage hole 21 of the spiral feeding plate 20 to move the waste salt from the high-level position to the low-level position. The high-temperature heat carrier and the low-temperature heat carrier contact in opposite directions for heat exchange, and they are all in a continuous state, which will cause the waste salt moving downward to form multiple temperature zones, and the temperature of the multiple temperature zones is gradually increased, and the waste salt with multiple impurities can be gradually decomposed, thereby obtaining refined waste salt. And it also avoids the problem of waste salt directly melting and sticking to the inner wall of the waste salt treatment tube 1 when heated due to impurities. The spiral baffle 19 is set so that the heat carrier will suddenly fall and hit the waste salt when it is transmitted upward, so that the waste salt is broken. The broken high-temperature waste salt will enter the second discharge pipe 15, and enter the transfer pipe 7 from the second discharge pipe 15. At this time, the heat carrier moving upward enters the transfer pipe 7, and the high-temperature waste salt and the already cold heat carrier exchange heat with each other, and the heat of the waste salt that does not need to be heated again is transferred to the heat carrier, so as to make full use of the heat of the device. After exchanging the heat of the waste salt, the waste salt leaks out of the leakage net 14 and is collected by the external collection box. At this time, the heat carrier is heated by the heating box 11 and enters the feed port of the spiral feeder 10. The feeder 10 transfers the heat carrier to the feed pipe 6 and enters the low level position of the waste salt treatment cylinder 1. The above actions are repeated continuously to collect a large amount of refined salt.

[0071] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A multifunctional equipment for treating industrial waste salt, characterized in that: The waste salt treatment barrel (1) is provided with a tilted waste salt treatment barrel (1) and a running mechanism for causing it to rotate in a circular motion; The inner wall of the waste salt treatment cylinder (1) is provided with a plurality of spiral loading plates (20) arranged horizontally so as to move the heat carrier containing high temperature inside from a low level position to a high level position, and the sides of two horizontally adjacent spiral loading plates (20) close to each other overlap in the longitudinal direction and are isolated from each other in the transverse direction, and a spiral baffle (19) is provided at the end of the spiral loading plate (20); the spiral loading plate (20) is provided with a leakage hole (21), and the diameter of the leakage hole (21) is smaller than the diameter of the heat carrier; It also includes a loading mechanism for inputting the heat carrier with a preset high temperature into a low level position of the waste salt treatment cylinder (1); The feeding mechanism comprises a material transfer pipe (7) connected to the high level position of the waste salt treatment cylinder (1); one end of the material transfer pipe (7) away from the waste salt treatment cylinder (1) is connected to a heating box (11) for transferring the heat carrier removed from the waste salt treatment cylinder (1) to the heating box (11) for heating; a second material discharge pipe (15) is connected to the low level position of the waste salt treatment cylinder (1); one end of the second material discharge pipe (15) away from the waste salt treatment cylinder (1) is connected to the material transfer pipe (7) for transferring the removed waste salt to the material transfer pipe (7); a mesh (14) is provided at a position of the material transfer pipe (7) through which the heat carrier and waste salt pass at the same time for screening the waste salt to the outside; the aperture of the mesh (14) is smaller than the diameter of the heat carrier and larger than the diameter of the waste salt; One side of the heating box (11) is connected to a first discharge pipe (12), and the side of the first discharge pipe (12) away from the heating box (11) is arranged at the feed port of the screw feeder (10) for transferring the heated heat carrier to the screw feeder (10), and the discharge port of the screw feeder (10) is provided with a delivery pipe (6), and one end of the delivery pipe (6) away from the screw feeder (10) is arranged at a low level position of the waste salt treatment cylinder (1) for transferring the heated heat carrier to the low level position of the waste salt treatment cylinder (1); A plurality of spiral loading plates (20) are arranged radially on the waste salt treatment cylinder (1).

2. The multifunctional industrial waste salt treatment equipment according to claim 1 is characterized in that: The left and right sides of the outer wall of the waste salt treatment cylinder (1) are rotatably connected to bearings (3), and the sides of the two bearings (3) that are away from each other are fixedly connected to sealing baffles (4), the material transfer pipe (7) passes through the sealing baffle (4) at a higher horizontal position, and the second discharge pipe (15) passes through the sealing baffle (4) at a lower horizontal position.

3. The multifunctional equipment for treating industrial waste salt according to claim 1, characterized in that: The operating mechanism comprises a reduction motor (9), a second gear (8) is fixedly mounted on the power output end of the reduction motor (9), a first gear (2) is fixedly connected to the outer wall of the waste salt treatment cylinder (1), and the second gear (8) and the first gear (2) are meshed with each other to drive the waste salt treatment cylinder (1) to rotate in a circular motion; It also comprises at least two auxiliary shaft rings (16), the outer wall of the waste salt treatment cylinder (1) is fixedly connected with auxiliary support shaft rings (5) having the same number as the auxiliary shaft rings (16), and the auxiliary support shaft rings (5) are rotatably connected in the auxiliary shaft rings (16).

4. The multifunctional equipment for treating industrial waste salt according to claim 3, characterized in that: It also includes a support plate (18) installed on the ground, on which the screw feeder (10) is fixed via a connecting plate, and the auxiliary shaft sleeve (16) and the reduction motor (9) are both fixed on the top of the support plate (18).

5. The multifunctional industrial waste salt treatment equipment according to claim 2 is characterized in that: The sealing baffle (4) at a high level is connected to a waste salt input pipe (17) for inputting waste salt from the outside, and the waste salt input pipe (17) is provided with a sealing door.

6. The multifunctional equipment for treating industrial waste salt according to claim 3, characterized in that: The waste salt treatment cylinder (1) is connected to a first air outlet pipe (22), and the first air outlet pipe (22) is connected to a combustion box (23) at a side away from the waste salt treatment cylinder (1), and the combustion box (23) is connected to a second air outlet pipe (24), and the second air outlet pipe (24) is connected to the heating box (11) at one end away from the combustion box (23).

7. The multifunctional equipment for treating industrial waste salt according to claim 6, characterized in that: The first gas outlet pipe (22) and the second gas outlet pipe (24) are both provided with a gas backflow prevention device.

8. A multifunctional method for treating industrial waste salt according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: The waste salt treatment cylinder (1) is arranged to be inclined, and then a high-temperature heat carrier is added to the feed port of the screw feeder (10), and the power supply of the screw feeder (10) is started to transfer the high-temperature heat carrier to the lower level position of the sealed waste salt treatment cylinder (1) through the feed pipe (6); Step 2: Start the power supply of the heating box (11) to input the waste salt from the outside into the high level position of the waste salt treatment cylinder (1) through the waste salt input pipe (17); Step 3: Start the power supply of the reduction motor (9), the reduction motor (9) drives the second gear (8) to rotate, and the second gear (8) causes the waste salt treatment barrel (1) to rotate in a circle through meshing with the first gear (2). At this time, multiple spiral loading plates (20) move the high-temperature heat carrier from a low level position to a high level position. When the heat carrier moves to the end of a single spiral loading plate (20), it follows the spiral baffle (19) to rotate in a circle for a preset distance and then falls onto the next spiral loading plate (20). The falling heat carrier continuously crushes the waste salt. The waste salt moves from the high level position of the waste salt treatment barrel (1) to the second discharge pipe (15) at a low level position along with the inclined waste salt treatment barrel (1) and the leak hole (21). In addition, the heat carrier continuously exchanges heat with the waste salt moving downward during the upward movement, so that the waste salt During the transmission to the lower level, the temperature gradually increases, forming multiple temperature zones, and the waste salt with various impurities is refined; the high-temperature waste salt moves from the second discharge pipe (15) to the transfer pipe (7), and the heat carrier that continuously moves upward moves to the transfer pipe (7). At this time, the high-temperature salt and the low-temperature heat carrier removed from the waste salt treatment cylinder (1) perform heat exchange. After the heat exchange is completed, the refined waste salt is removed through the filter (14) and collected through the collection box (13). At this time, the heat carrier enters the heating box (11) for reheating. The heat carrier that has been heated moves to the first discharge pipe (12) under the cooperation of gravity. The heat carrier in the first discharge pipe (12) enters the spiral feeder (10), and the reheated heat carrier is transferred to the lower level position in the waste salt treatment cylinder (1) through the feed pipe (6). Step 4: Start the power supply of the combustion box (23), and the gas decomposed in the waste salt treatment cylinder (1) moves from the first outlet pipe (22) to the combustion box (23) for combustion. The combustion box (23) transmits the hot gas after combustion to the heating box (11) to heat the heat carrier, thereby maximizing the utilization of thermal energy.

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