Industrial waste salt microwave treatment system
Through the industrial waste salt microwave treatment system, the waste salt is cracked and roasted by using microwave heating technology, which solves the problems of slow heating speed and uneven heating in the existing technology, and realizes the harmlessness and reduction of waste salt, and has the advantages of saving energy and improving labor conditions.
Patent Information
- Application Number
- CN202421599691.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-08
AI Technical Summary
The prior art has problems such as slow heating speed, unevenness, large equipment footprint, high ambient temperature, and poor working conditions for operators when dealing with industrial waste salt. The high-temperature treatment method is prone to external coke endogenous phenomena, and the treatment cost is high and the environmental hazards are great.
The industrial waste salt microwave treatment system is used to crack and roast the waste salt through a microwave pyrolysis furnace to achieve harmless and reduced waste salt. The system includes waste salt input pipeline, hopper, cloth machine, drying furnace, exhaust gas treatment device, microwave pyrolysis furnace, water-cooled screw conveyor and discharge conveyor. The microwave heating method has the characteristics of fast heating speed, uniform heating, selectivity, catalyticity, energy saving, etc.
The rapid and even heating of waste salt is achieved, the equipment footprint and ambient temperature is reduced, the working conditions of operators are improved, energy is saved, and waste salt is effectively treated, reducing environmental hazards.
Smart Images
Figure CN222805774U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of waste salt pyrolysis treatment, and in particular to an industrial waste salt microwave treatment system. Background Art
[0002] Many enterprises in the industrial sector produce a large amount of waste salt residue during the production process. For example, in the industrial production processes of pesticide intermediates, drug synthesis and printing and dyeing, as well as solid-liquid separation, solution concentration crystallization and sewage treatment, waste salt residue is produced. Generally, it contains one or more of sodium chloride, sodium sulfate, sodium nitrate, etc., and often carries a large amount of organic matter. It has the characteristics of a wide variety, complex composition, many sources, high processing cost and great environmental harm. Because it contains some organic and inorganic impurities, these waste salt residues cannot be directly used as industrial raw salt, let alone used in the food or pharmaceutical industry. The latest version of the "National List of Hazardous Wastes" has been officially implemented, and a series of technical and institutional documents for environmental damage identification and assessment have also been issued, indicating that my country's hazardous waste management will be more stringent.
[0003] At present, there are roughly three methods for resource utilization of industrial waste salt in China, namely salt washing method, alkali production method and high temperature treatment method. The salt washing method is to use organic or inorganic solvents to dissolve organic matter in waste salt to separate impurities from salt. This method has high disposal costs and the organic solvents used are prone to secondary pollution. The alkali making method is to use other substances to react with sodium chloride in industrial waste salt slag to obtain alkali. This method has a long process route, large investment and high production cost. The high-temperature treatment method is to use high-temperature pyrolysis or incineration process to decompose organic matter in waste salt slag into gas and volatilize it. The high-temperature treatment method usually uses a conventional heating furnace to treat waste salt at high temperature. The conventional heating furnace is externally heated, and heat is first transferred to the surface of the heated material by heat conduction, convection and thermal radiation, and then the center temperature is gradually increased by heat conduction. It takes a certain amount of heat conduction time to make the center reach the required temperature. When heating by conventional heating method, in order to increase the heating speed, the external temperature needs to be increased, and the temperature gradient is increased, which is easy to produce external coke endogenous phenomenon. At the same time, conventional industrial heating equipment is relatively large. When treating waste salt, the equipment occupies a lot of space, the ambient temperature is also relatively high, and the working conditions of the operators are poor and the intensity is high. Utility Model Content
[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a microwave treatment system for industrial waste salt, which achieves harmlessness and reduction of waste salt, and has the characteristics of fast heating speed, uniform heating, selectivity, catalysis, no direct contact between the heating source and the heating material, easy automatic control, and energy saving through microwave heating.
[0005] The present application provides an industrial waste salt microwave treatment system, comprising: a waste salt input pipeline, a loading hopper, a material distributor, a drying furnace, an exhaust gas treatment device, a microwave pyrolysis furnace, a water-cooled screw conveyor, and a discharge conveying pipeline;
[0006] The output end of the waste salt input pipeline is connected to the feed end of the upper hopper, the discharge end of the upper hopper is connected to the input end of the material distributor, the output end of the material distributor is connected to the feed end of the drying furnace, the salt slag discharge end of the drying furnace is connected to the feed port of the microwave pyrolysis furnace, the waste gas discharge end of the drying furnace is connected to the tail gas treatment device, the product discharge end of the microwave pyrolysis furnace is connected to the feed end of the water-cooled screw conveyor, the waste gas exhaust port of the microwave pyrolysis furnace is connected to the tail gas treatment device, and the discharge end of the water-cooled screw conveyor is connected to the discharge conveying pipeline;
[0007] The water-cooled screw conveyor is provided with a water cooling device, the waste salt input pipeline is used to convey the waste salt to be treated to the drying furnace through the upper hopper and the distribution machine in sequence, the drying furnace is used to dry out the pyrolysis gas in the waste salt to be treated by mixing the high-temperature flue gas with the waste salt to be treated and discharge it to the tail gas treatment device, the drying furnace is also used to convey the first waste salt obtained after the drying treatment to the microwave pyrolysis furnace, the microwave pyrolysis furnace is used to crack and roast the first waste salt to obtain cracking waste gas and target industrial salt and discharge the cracking waste gas to the tail gas treatment device, and convey the target industrial salt to the water-cooled screw conveyor, the water-cooled screw conveyor is used to cool the target industrial salt while conveying it, and the water-cooled screw conveyor is also used to output the target industrial salt from the discharge conveying pipeline.
[0008] According to some embodiments of the present application, the industrial waste salt microwave treatment system also includes a hoist, which is connected to the output end of the waste salt input pipeline, and is used to lift the waste salt to be treated transported from the waste salt input pipeline to the feed end of the upper hopper and transport the waste salt to be treated to the upper hopper.
[0009] According to some embodiments of the present application, a discharge valve is provided on the discharge conveying pipeline, and the discharge valve is used to output the target industrial salt that has been cooled.
[0010] According to some embodiments of the present application, the industrial waste salt microwave treatment system also includes a condenser and a condensed water collection tank, the exhaust gas discharge end of the drying furnace is connected to the input end of the condenser, the exhaust gas output end of the condenser is connected to the exhaust gas treatment device, and the condensed water output end of the condenser is connected to the condensed water collection tank.
[0011] According to some embodiments of the present application, the industrial waste salt microwave treatment system also includes a fan, and the exhaust gas outlet of the microwave pyrolysis furnace is connected to the exhaust gas treatment device through the fan.
[0012] According to some embodiments of the present application, the industrial waste salt microwave treatment system also includes a discharging hopper, an input end of the discharging hopper is connected to the product discharging end of the microwave pyrolysis furnace, and an output end of the discharging hopper is connected to the feeding end of the water-cooled screw conveyor.
[0013] According to some embodiments of the present application, the microwave pyrolysis furnace is equipped with a 1.5KW industrial-grade microwave source.
[0014] According to some embodiments of the present application, the microwave pyrolysis furnace uses microwave antenna energy feeding.
[0015] In the present application, the waste salt input pipeline is used to transport the waste salt to be processed to the drying furnace through the upper hopper and the distributor in sequence, the drying furnace is used to dry out the pyrolysis gas in the waste salt to be processed by mixing the high-temperature flue gas with the waste salt to be processed and discharge it to the tail gas treatment device, the drying furnace is also used to transport the first waste salt obtained by drying to the microwave pyrolysis furnace, the microwave pyrolysis furnace is used to crack and roast the first waste salt to obtain cracking waste gas and target industrial salt and discharge the cracking waste gas to the tail gas treatment device, and transport the target industrial salt to the water-cooled screw conveyor, the water-cooled screw conveyor is used to cool the target industrial salt while transporting it, and the water-cooled screw conveyor is also used to output the target industrial salt from the discharging conveying pipeline. Through this arrangement, the present application realizes the harmlessness and reduction of waste salt, and through microwave heating, it has the characteristics of fast heating speed, uniform heating, selectivity, catalysis, no direct contact between the heating source and the heating material, easy automatic control, and energy saving.
[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0018] Figure 1 A partial structural schematic diagram of an industrial waste salt microwave treatment system provided in an embodiment of the present application;
[0019] Figure 2 Another partial schematic diagram of the industrial waste salt microwave treatment system provided for an embodiment of the present application.
[0020] Reference numerals:
[0021] Waste salt input pipeline 110, elevator 111, upper hopper 112, material distributor 113, drying furnace 114, condenser 115, condensate collection tank 116, tail gas treatment device 117;
[0022] Microwave pyrolysis furnace 120, fan 121, discharge hopper 122, water-cooled screw conveyor 123, discharge valve 124, discharge conveying pipeline 125, return pipe 126, soft water inlet pipe 127;
[0023] A feed inlet 131 and a waste gas outlet 132 . DETAILED DESCRIPTION
[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0025] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.
[0026] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0027] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.
[0028] Many enterprises in the industrial sector produce a large amount of waste salt residue during the production process. For example, in the industrial production processes of pesticide intermediates, drug synthesis and printing and dyeing, as well as solid-liquid separation, solution concentration crystallization and sewage treatment, waste salt residue is produced. Generally, it contains one or more of sodium chloride, sodium sulfate, sodium nitrate, etc., and often carries a large amount of organic matter. It has the characteristics of a wide variety, complex composition, many sources, high processing cost and great environmental harm. Because it contains some organic and inorganic impurities, these waste salt residues cannot be directly used as industrial raw salt, let alone used in the food or pharmaceutical industry. The latest version of the "National List of Hazardous Wastes" has been officially implemented, and a series of technical and institutional documents for environmental damage identification and assessment have also been issued, indicating that my country's hazardous waste management will be more stringent.
[0029] At present, there are roughly three methods for resource utilization of industrial waste salt in China, namely salt washing method, alkali production method and high temperature treatment method. The salt washing method is to use organic or inorganic solvents to dissolve organic matter in waste salt to separate impurities from salt. This method has high disposal costs and the organic solvents used are prone to secondary pollution. The alkali making method is to use other substances to react with sodium chloride in industrial waste salt slag to obtain alkali. This method has a long process route, large investment and high production cost. The high-temperature treatment method is to use high-temperature pyrolysis or incineration process to decompose organic matter in waste salt slag into gas and volatilize it. The high-temperature treatment method usually uses a conventional heating furnace to treat waste salt at high temperature. The conventional heating furnace is externally heated, and heat is first transferred to the surface of the heated material by heat conduction, convection and thermal radiation, and then the center temperature is gradually increased by heat conduction. It takes a certain amount of heat conduction time to make the center reach the required temperature. When heating by conventional heating method, in order to increase the heating speed, the external temperature needs to be increased, and the temperature gradient is increased, which is easy to produce external coke endogenous phenomenon. At the same time, conventional industrial heating equipment is relatively large. When treating waste salt, the equipment occupies a lot of space, the ambient temperature is also relatively high, and the working conditions of the operators are poor and the intensity is high.
[0030] In order to solve the above-mentioned problems, the present application proposes a microwave treatment system for industrial waste salt. The embodiments of the present application are further described below in conjunction with the accompanying drawings.
[0031] Reference Figure 1 to Figure 2The present application provides an industrial waste salt microwave treatment system, comprising: a waste salt input pipeline 110, an upper hopper 112, a distributor 113, a drying furnace 114, an exhaust gas treatment device 117, a microwave pyrolysis furnace 120, a water-cooled screw conveyor 123 and a discharge conveying pipeline 125; the output end of the waste salt input pipeline 110 is connected to the feed end of the upper hopper 112, the discharge end of the upper hopper 112 is connected to the input end of the distributor 113, and the distributor 114 is connected to the feed end of the upper hopper 112. The output end of 13 is connected to the feed end of the drying furnace 114, the salt slag discharge end of the drying furnace 114 is connected to the feed port 131 of the microwave pyrolysis furnace 120, the waste gas discharge end of the drying furnace 114 is connected to the tail gas treatment device 117, the product discharge end of the microwave pyrolysis furnace 120 is connected to the feed end of the water-cooled screw conveyor 123, the waste gas exhaust port 132 of the microwave pyrolysis furnace 120 is connected to the tail gas treatment device 117, the water-cooled screw conveyor 123 The discharge end is connected to the discharge conveying pipeline 125; the water-cooled screw conveyor 123 is provided with a water cooling device, the waste salt input pipeline 110 is used to convey the waste salt to be treated to the drying furnace 114 through the upper hopper 112 and the distributor 113 in sequence, the drying furnace 114 is used to dry out the pyrolysis gas in the waste salt to be treated by mixing the high-temperature flue gas with the waste salt to be treated and discharge it to the exhaust gas treatment device 117, the drying furnace 114 is also used to convey the first waste salt obtained after the drying treatment to the microwave pyrolysis furnace 120, the microwave pyrolysis furnace 120 is used to crack and roast the first waste salt to obtain cracking waste gas and target industrial salt and discharge the cracking waste gas to the exhaust gas treatment device 117, and convey the target industrial salt to the water-cooled screw conveyor 123, the water-cooled screw conveyor 123 is used to cool the target industrial salt while conveying it, and the water-cooled screw conveyor 123 is also used to output the target industrial salt from the discharge conveying pipeline 125.
[0032] It should be noted that the microwave heating used in the microwave pyrolysis furnace 120 has the following advantages: (1) It belongs to internal heating. Electromagnetic energy directly acts on the medium molecules to convert into heat energy, and the transmission causes the inside and outside of the medium to be heated at the same time. Heat conduction is not required, so uniform heating can be achieved in a short time. Specifically, microwave heating is volume heating caused by dielectric loss in the electromagnetic field. Under the action of the electromagnetic field, the molecular motion changes from the original chaotic state to orderly high-frequency vibration, and the molecular kinetic energy is converted into heat energy to achieve the purpose of uniform heating. Therefore, microwave heating is also called "volume heating" without temperature gradient, so the heating is uniform; (2) It has the advantages of strong penetration ability and high energy utilization efficiency. The penetration ability is the ability of electromagnetic waves to penetrate into the interior of the medium. The penetration depth and wavelength of electromagnetic waves are of the same order of magnitude. Except for larger objects that cannot be penetrated, microwaves can directly penetrate into the interior of the material and heat the inside and outside of the material evenly. The energy utilization efficiency is very high and the material temperature rises very quickly; 3) It has the advantage of selective heating. Since the ability of a material to absorb microwave energy depends on its own dielectric properties, each component in the mixed material can be selectively heated. Generally speaking, a medium with a large dielectric constant is easy to heat with microwaves, while a medium with a small dielectric constant is difficult to heat with microwaves. Iron ore has a large dielectric constant, so it is easy to absorb microwaves and heat. (4) Microwaves have a catalytic effect on the material being heated, promoting the heating of the material. (5) It is energy-saving and efficient. During microwave heating, the heated material is placed in a metal furnace cavity. The electromagnetic waves cannot leak out and can only be absorbed by the heated object. The air in the heating room and the corresponding container will not be heated, so the thermal efficiency is high and the production environment is significantly improved. (6) It is clean, hygienic and environmentally friendly. Generally, industrial heating equipment is relatively large, occupies a large area, and the ambient temperature is relatively high. The working conditions of the operators are poor and the intensity is high. Microwave heating equipment occupies a small area, avoids high ambient temperature, and greatly improves the working environment of the workers. Microwaves themselves do not produce any pollutants, which is beneficial to environmental protection; (7) Easy to control, the microwave power is automatically adjusted by program and electronic control, it is ready to use, the thermal inertia is extremely small, it can achieve rapid control of temperature rise and fall, the control accuracy is high, it is conducive to continuous production and automatic control. It can be seen that microwave heating technology has the characteristics of fast heating speed, selectivity, catalysis, no direct contact between the heating source and the heating material, easy automatic control, and energy saving.
[0033] It should be noted that if Figure 1 As shown, the soft water inlet pipe 127 and the return pipe 126 are combined to form a circulating cooling water system for the water-cooled screw conveyor 123 and the microwave pyrolysis furnace 120. In this embodiment, the water delivered by the soft water inlet pipe 127 has a flow rate of 15m 3 / h, the temperature is less than 30℃, and the return water temperature output from the return pipe 126 rises by 3-5℃.
[0034] In the present application, the waste salt input pipeline 110 is used to transport the waste salt to be treated to the drying furnace 114 through the upper hopper 112 and the distributor 113 in sequence. The drying furnace 114 is used to dry out the pyrolysis gas in the waste salt to be treated by mixing the high-temperature flue gas with the waste salt to be treated and discharge it to the exhaust gas treatment device 117. The drying furnace 114 is also used to transport the first waste salt obtained after drying to the microwave pyrolysis furnace 120. The microwave pyrolysis furnace 120 is used to crack and roast the first waste salt to obtain cracking waste gas and target industrial salt and discharge the cracking waste gas to the exhaust gas treatment device 117, and transport the target industrial salt to the water-cooled screw conveyor 123. The water-cooled screw conveyor 123 is used to transport and cool the target industrial salt. The water-cooled screw conveyor 123 is also used to output the target industrial salt from the discharge conveying pipeline 125. Through this arrangement, the present application realizes the harmlessness and reduction of waste salt. Through microwave heating, it has the characteristics of fast heating speed, uniform heating, selectivity, catalysis, no direct contact between the heating source and the heating material, easy automatic control and energy saving.
[0035] Reference Figure 2 It can be understood that the industrial waste salt microwave treatment system also includes a hoist 111, which is connected to the output end of the waste salt input pipeline 110. The hoist 111 is used to lift the waste salt to be treated transported from the waste salt input pipeline 110 to the feed end of the upper hopper 112 and transport the waste salt to be treated to the upper hopper 112.
[0036] It should be noted that, by setting up the elevator 111, the waste salt to be processed transported to the elevator 111 is lifted to the same level as the feed end of the upper hopper 112, and the waste salt to be processed is transported to the feed end of the upper hopper 112.
[0037] Reference Figure 1 It can be understood that a discharge valve 124 is provided on the discharge conveying pipeline 125, and the discharge valve 124 is used to output the target industrial salt that has been cooled.
[0038] It should be noted that only when the temperature of the target industrial salt delivered by the water-cooled screw conveyor 123 is less than 100° C., the discharge valve 124 is opened to deliver the target industrial salt from the discharge delivery pipeline 125 to the next process.
[0039] Reference Figure 1 It can be understood that the industrial waste salt microwave treatment system also includes a condenser 115 and a condensed water collection tank 116, the exhaust gas discharge end of the drying furnace 114 is connected to the input end of the condenser 115, the exhaust gas output end of the condenser 115 is connected to the exhaust gas treatment device 117, and the condensed water output end of the condenser 115 is connected to the condensed water collection tank 116.
[0040] It should be noted that the hot and humid air output from the drying furnace 114 is discharged to the condenser 115 and condensed to obtain condensed water and waste gas. The condensed water is transported to the condensed water collection tank 116 for collection, and the waste gas is transported to the exhaust gas treatment device 117 for treatment.
[0041] It should be noted that Figure 1 A1 in the figure indicates that the work in this area is the responsibility of the user, specifically the process of waste salt input pipeline 110 - elevator 111 - upper hopper 112 - material distributor 113 - drying furnace 114 - condenser 115 - condensate collection tank 116 and tail gas treatment device.
[0042] Reference Figure 1 It can be understood that the industrial waste salt microwave treatment system also includes a fan 121, and the exhaust gas outlet 132 of the microwave pyrolysis furnace 120 is connected to the exhaust gas treatment device 117 through the fan 121.
[0043] It should be noted that, by providing the fan 121 , the cracked waste gas obtained by cracking and roasting the first waste salt can be better transported to the tail gas treatment device 117 .
[0044] Reference Figure 1 It can be understood that the industrial waste salt microwave treatment system also includes a discharge hopper 122, the input end of the discharge hopper 122 is connected to the product discharge end of the microwave pyrolysis furnace 120, and the output end of the discharge hopper 122 is connected to the feed end of the water-cooled screw conveyor 123.
[0045] It should be noted that the target industrial salt outputted from the exhaust port 132 of the microwave pyrolysis furnace 120 is transported from the discharge hopper 122 to the water-cooled screw conveyor 123 .
[0046] It can be understood that the microwave pyrolysis furnace 120 is equipped with a 1.5KW industrial-grade microwave source.
[0047] It should be noted that the microwave pyrolysis furnace 120 is equipped with a 1.5KW industrial-grade microwave source with adjustable power to ensure that the cavity temperature of the microwave pyrolysis furnace 120 is uniform, adjustable and controllable, which can meet the requirements of different technical processes and ensure 24-hour uninterrupted use. However, the 1.2KW and 1.0kw household-grade microwave source systems used in related technologies cannot work continuously for 24 hours and the power cannot be continuously adjusted, which cannot ensure the uniformity, controllability and adjustable temperature of the cavity material, and cannot meet the requirements of different processes.
[0048] It can be understood that the microwave pyrolysis furnace 120 uses microwave antenna energy feeding.
[0049] It should be noted that the microwave pyrolysis furnace 120 uses microwave antenna energy feeding to ensure that the microwave field is uniform and microwave reflection does not damage the magnetron, ensuring that the magnetron can be used 24 hours a day without stopping, and has a long service life (the life of the magnetron is generally affected by the microwave reflection power and cooling method). At the same time, the wearing parts (magnetron) can be replaced without stopping the machine without causing microwave leakage. The related technology usually uses microwave direct energy feeding, which is difficult to ensure the uniform temperature of the microwave cavity material, and it is also impossible to replace the magnetron online without stopping the machine.
[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0051] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.
[0052] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.
Claims
1. An industrial waste salt microwave treatment system, characterized in that: include: Waste salt input pipeline, loading hopper, material distributor, drying furnace, tail gas treatment device, microwave pyrolysis furnace, water-cooled screw conveyor and discharge conveying pipeline; The output end of the waste salt input pipeline is connected to the feed end of the upper hopper, the discharge end of the upper hopper is connected to the input end of the material distributor, the output end of the material distributor is connected to the feed end of the drying furnace, the salt slag discharge end of the drying furnace is connected to the feed port of the microwave pyrolysis furnace, the waste gas discharge end of the drying furnace is connected to the tail gas treatment device, the product discharge end of the microwave pyrolysis furnace is connected to the feed end of the water-cooled screw conveyor, the waste gas exhaust port of the microwave pyrolysis furnace is connected to the tail gas treatment device, and the discharge end of the water-cooled screw conveyor is connected to the discharge conveying pipeline; The water-cooled screw conveyor is provided with a water cooling device, the waste salt input pipeline is used to convey the waste salt to be treated to the drying furnace through the upper hopper and the distribution machine in sequence, the drying furnace is used to dry out the pyrolysis gas in the waste salt to be treated by mixing the high-temperature flue gas with the waste salt to be treated and discharge it to the tail gas treatment device, the drying furnace is also used to convey the first waste salt obtained after the drying treatment to the microwave pyrolysis furnace, the microwave pyrolysis furnace is used to crack and roast the first waste salt to obtain cracking waste gas and target industrial salt and discharge the cracking waste gas to the tail gas treatment device, and convey the target industrial salt to the water-cooled screw conveyor, the water-cooled screw conveyor is used to cool the target industrial salt while conveying it, and the water-cooled screw conveyor is also used to output the target industrial salt from the discharge conveying pipeline.
2. The industrial waste salt microwave treatment system according to claim 1, characterized in that: The industrial waste salt microwave treatment system also includes a hoist, which is connected to the output end of the waste salt input pipeline. The hoist is used to lift the waste salt to be treated transported from the waste salt input pipeline to the feed end of the upper hopper and transport the waste salt to be treated to the upper hopper.
3. The industrial waste salt microwave treatment system according to claim 1, characterized in that: The discharging conveying pipeline is provided with a discharging valve, and the discharging valve is used to output the target industrial salt after cooling treatment.
4. The industrial waste salt microwave treatment system according to claim 1, characterized in that: The industrial waste salt microwave treatment system also includes a condenser and a condensed water collection tank. The waste gas discharge end of the drying furnace is connected to the input end of the condenser, the waste gas output end of the condenser is connected to the tail gas treatment device, and the condensed water output end of the condenser is connected to the condensed water collection tank.
5. The industrial waste salt microwave treatment system according to claim 1, characterized in that: The industrial waste salt microwave treatment system also includes a fan, and the exhaust gas outlet of the microwave pyrolysis furnace is connected to the tail gas treatment device through the fan.
6. The industrial waste salt microwave treatment system according to claim 1, characterized in that: The industrial waste salt microwave treatment system also includes a discharge hopper, the input end of the discharge hopper is connected to the product discharge end of the microwave pyrolysis furnace, and the output end of the discharge hopper is connected to the feed end of the water-cooled screw conveyor.
7. The industrial waste salt microwave treatment system according to claim 1, characterized in that: The microwave pyrolysis furnace is equipped with a 1.5KW industrial-grade microwave source.
8. The industrial waste salt microwave treatment system according to claim 7, characterized in that: The microwave pyrolysis furnace adopts microwave antenna energy feeding.