Waste liquid treatment device, solid-state battery production system and waste liquid treatment method

Abstract

The invention discloses a waste liquid treatment device, a solid-state battery production system and a waste liquid treatment method, and the waste liquid treatment device comprises a reaction tank which is provided with a reaction cavity, and waste liquid is suitable for generating chemical reaction in the reaction cavity to generate hydrogen sulfide; the first liquid inlet pipe is connected with the reaction tank and is connected in series with a first driving pump for conveying waste liquid to the reaction cavity; the second liquid inlet pipe is connected with the reaction tank and is used for conveying a solution which reacts with sulfide in the waste liquid; the first exhaust pipe is connected with the reaction tank and is used for exhausting gas in the reaction cavity; the gas detector is mounted in the reaction tank and is used for detecting hydrogen sulfide in the reaction tank. According to the waste liquid treatment device, sulfide in the waste liquid is fully treated before the waste liquid is transferred, so that the probability that hydrogen sulfide is generated in the waste liquid transfer process can be reduced, the occupational health of operators can be protected, meanwhile, the situation of over-treatment can be prevented, resource waste is reduced, and economical efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production waste liquid treatment, and in particular to a waste liquid treatment device, a solid-state battery production system and a waste liquid treatment method. Background Art

[0002] In the relevant technology, a large amount of waste liquid is generated during the production process of solid-state batteries, and these waste liquids contain a large amount of trimethylbenzene, sulfide and chloride ions. Due to the presence of these substances, solid-state battery waste liquid needs to be transferred to a manufacturer with professional qualifications for treatment. However, due to the large amount of sulfide contained in the waste liquid, when it comes into contact with air, water and other substances during the transportation and treatment of the waste liquid, it is very easy to produce hydrogen sulfide, sulfurous acid and other substances that are harmful to the human body, which will threaten the occupational health of operators. Summary of the invention

[0003] 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 waste liquid treatment device, which can fully treat the sulfide in the waste liquid before the waste liquid is transferred, thereby reducing the probability of generating hydrogen sulfide during the waste liquid transportation process, thereby protecting the occupational health of operators, and at the same time, by setting up a gas detector, it can also prevent over-treatment from occurring, thereby reducing resource waste and improving economic efficiency.

[0004] The present application also proposes a solid-state battery production system having the above-mentioned waste liquid treatment device.

[0005] The application also proposes a waste liquid treatment method.

[0006] In the first aspect, an embodiment of the present application provides a waste liquid treatment device, which is used to treat waste liquid generated in the production process of solid-state batteries. The waste liquid treatment device includes: a reaction tank, having a reaction chamber, and the waste liquid is suitable for chemically reacting in the reaction chamber to generate hydrogen sulfide; a first liquid inlet pipe, connected to the reaction tank, and connected in series with a first drive pump for transporting the waste liquid to the reaction chamber; a second liquid inlet pipe, connected to the reaction tank, for transporting a solution that reacts with sulfides in the waste liquid; a first exhaust pipe, connected to the reaction tank, for exhausting gas in the reaction chamber; a gas detector, installed in the reaction tank, for detecting hydrogen sulfide in the reaction tank.

[0007] In the above technical scheme, by setting up a reaction tank and a gas detector, the sulfide in the waste liquid can be fully treated before the waste liquid is transferred, thereby reducing the probability of generating hydrogen sulfide during the waste liquid transportation process, thereby protecting the occupational health of the operators. At the same time, by setting up a gas detector, over-treatment can be prevented, thereby reducing resource waste and improving economic efficiency.

[0008] In some embodiments, the waste liquid treatment device further includes: a first detection component, which is disposed on the reaction tank and is used to detect the liquid capacity in the reaction chamber in real time.

[0009] In the above technical solution, by setting up the first detection component, the liquid capacity in the reaction chamber can be detected in real time, so that when the waste liquid is transported into the reaction chamber, the occurrence of bubbling can be effectively prevented. At the same time, it is also possible to determine whether leakage occurs by detecting the liquid capacity, which can help the staff to promptly discover potential leakage problems and quickly take corresponding measures, thereby reducing the risks and losses in the waste liquid treatment process.

[0010] In some embodiments, the first detection component includes: a liquid level meter for detecting the liquid level height in the reaction tank; and / or a weighing sensor for detecting the weight of the reaction tank; and / or a high liquid level sensor for detecting the highest liquid level in the reaction tank.

[0011] In the above technical scheme, by setting the first detection component to include a liquid level meter, the liquid intake amount can be intuitively reflected, thereby, the liquid intake amount can be more effectively controlled, and the reaction tank can be prevented from bubbling; by setting the first detection component to include a weighing sensor, it can be unaffected by the liquid surface state, thereby improving the measurement accuracy and system reliability; by setting the first detection component to include a high liquid level sensor, the reaction tank can be further prevented from bubbling.

[0012] In some embodiments, the first detection assembly further includes: an actuator configured to stop the first liquid inlet pipe from conveying waste liquid to the reaction chamber when the waste liquid reaches a maximum liquid level.

[0013] In the above technical solution, by setting up an actuator, the waste liquid can be stopped from being transported to the reaction chamber when the waste liquid reaches the highest liquid level. In this way, the reaction tank can be prevented from bubbling, thereby reducing the probability of danger in the waste liquid treatment process.

[0014] In some embodiments, the first drive pump is a pneumatic pump, and the actuator includes: an air pipe and a control valve. The air pipe is connected to the pneumatic pump and is used to provide compressed air to the pneumatic pump. The control valve is connected in series to the air pipe. When the waste liquid reaches the highest liquid level, the control valve is closed to stop supplying air to the pneumatic pump.

[0015] In the above technical solution, by providing the actuator including: an air pipe and a control valve, the overall structure of the first detection component can be simplified, thereby reducing the production cost of the first detection component.

[0016] In some embodiments, the waste liquid treatment device further includes: a first air inlet pipe, which is connected to the reaction tank and is used to provide inert gas to the reaction tank so that hydrogen sulfide is discharged from the reaction tank through the first exhaust pipe.

[0017] In the above technical solution, by providing the first air inlet pipe to provide inert gas to the reaction tank, the hydrogen sulfide in the reaction tank can be quickly discharged, thereby improving the waste liquid treatment efficiency; at the same time, due to the good stability of the inert gas, the risk in the waste liquid treatment process can also be reduced.

[0018] In some embodiments, a nozzle is provided at the outlet end of the second liquid inlet pipe, and the nozzle is disposed in the reaction tank for spraying deionized water into the reaction tank.

[0019] In the above technical solution, by providing a nozzle, the uniformity of the distribution of the liquid in the entire tank can be improved, thereby better promoting the mixing of the waste liquid and deionized water, thereby improving the efficiency of hydrogen sulfide generation.

[0020] In some embodiments, the waste liquid treatment device also includes: a standing tank, which is used to stand and separate the treated liquid obtained after treatment in the reaction tank; a third liquid inlet pipe, which is connected between the reaction tank and the standing tank; and a second driving pump connected in series to the third liquid inlet pipe, which is used to pump the treated liquid into the standing tank.

[0021] In the above technical solution, by setting up a static tank, the separation of water and trimethylolus can be achieved, so that only trimethylolus can be processed, thereby reducing the cost of transferring and processing waste liquid.

[0022] In some embodiments, the waste liquid treatment device further includes: an oil-water interface measuring instrument, which is installed on the static tank and is used to measure the oil-water interface of the liquid in the static tank.

[0023] In the above technical solution, by setting up an oil-water interface measuring instrument, it is helpful to separate water from the organic solvent, so that the water in the treatment liquid can be effectively removed, thereby reducing the cost of transfer treatment.

[0024] In some embodiments, the waste liquid treatment device further includes: a second detection component, which is disposed on the static tank and is used to detect the liquid capacity in the static tank in real time.

[0025] In the above technical solution, by setting up a second detection component, the liquid capacity in the static tank can be detected in real time, so that when the waste liquid is transported into the static tank, the occurrence of bubbling can be effectively prevented. At the same time, it is also possible to determine whether leakage occurs by detecting the liquid capacity, which can help staff to promptly discover potential leakage problems and quickly take corresponding measures, thereby reducing the risks and losses in the waste liquid treatment process.

[0026] In some embodiments, the waste liquid treatment device further includes: a solid-liquid separator, which is used for solid-liquid separation and is connected in series between the reaction tank and the second driving pump.

[0027] In the above technical solution, by setting up a solid-liquid separator, the solid waste and liquid waste in the waste liquid treatment device can be treated in a targeted manner, thereby improving the treatment efficiency of the overall process.

[0028] In some embodiments, the waste liquid treatment device further includes: a transfer tank and a transfer pump, the transfer tank is connected to the static tank, and the transfer pump is used to transfer the organic solvent in the static tank to the transfer tank.

[0029] In the above technical solution, by providing a transfer tank and a transfer pump, the organic solvent can be transferred to a relevant treatment agency for centralized treatment.

[0030] In some embodiments, the transfer tank is an explosion-proof tank.

[0031] In the above technical solution, by setting the transfer tank as an explosion-proof tank, the explosion risk during the transfer and processing of trimethylol can be further reduced.

[0032] In some embodiments, anti-corrosion parts are provided on the inner wall of the transfer tank.

[0033] In the above technical solution, by arranging anti-corrosion parts on the inner wall of the transfer tank, the corrosion of the transfer tank by the waste liquid can be effectively reduced, thereby further improving the service life and reliability of the transfer tank.

[0034] In some embodiments, the anti-corrosion member is a Teflon member.

[0035] In the above technical solution, by setting the anti-corrosion part as a Teflon part, the durability of the transfer tank can be improved, and then the reliability of the transfer tank can be improved, while the maintenance cost can be reduced, and the maintenance cost of the waste liquid treatment device can be reduced. In some embodiments, the thickness of the Teflon part ranges from 0.4mm to 0.5mm.

[0036] In the above technical solution, by setting the thickness range of the Teflon part to 0.4mm-0.5mm, the anti-corrosion part can meet the anti-corrosion conditions without being too thick, thereby reducing the production cost of the entire transfer tank.

[0037] In some embodiments, the waste liquid treatment device further includes: a second air inlet pipe, which is connected to the transfer tank to provide inert gas into the transfer tank.

[0038] In the above technical solution, by providing a second air inlet pipe to provide inert gas into the transfer tank, oxygen among the three elements of combustion can be isolated, thereby further reducing the risk of explosion of the trimethylol solution.

[0039] In some embodiments, the inert gas is nitrogen.

[0040] In the above technical solution, by setting the inert gas to nitrogen, the cost in the waste liquid treatment process can be further reduced.

[0041] In some embodiments, the transfer tank is provided with: a detection device, which is provided on the transfer tank and is used to detect the liquid level, temperature and / or oxygen concentration in the transfer tank in real time; a pressure relief mechanism, which is provided on the transfer tank and is used to release the pressure in the transfer tank.

[0042] In the above technical scheme, by setting up a detection device, the liquid level, temperature and / or oxygen concentration in the transfer tank can be detected in real time, and then it can be indirectly detected whether the solution in the transfer tank has potential leakage, explosion and combustion problems, so that corresponding measures can be taken quickly, thereby reducing the risk of explosion and loss; by setting up a pressure relief mechanism, the pressure can be automatically released when the pressure in the transfer tank exceeds the set range, thereby preventing explosions or other safety accidents caused by overpressure.

[0043] In some embodiments, the waste liquid treatment device further includes: a third detection component, which is disposed on the transfer tank and is used to detect the liquid capacity in the transfer tank in real time.

[0044] In the above technical solution, by setting up a third detection component, the liquid capacity in the transfer tank can be detected in real time, so that when transporting waste liquid into the transfer tank, it can effectively prevent the occurrence of bubbling. At the same time, it is also possible to determine whether leakage occurs by detecting the liquid capacity, which can help staff to promptly discover potential leakage problems and quickly take corresponding measures, thereby reducing the risks and losses during the waste liquid transfer process.

[0045] In some embodiments, the waste liquid treatment device also includes: a temporary storage tank, having a holding cavity, the holding cavity is configured to store waste liquid, the temporary storage tank is connected to the reaction tank through a first liquid inlet pipe; a fourth liquid inlet pipe, connected to the temporary storage tank, for conveying waste liquid into the holding cavity; a third drive pump connected in series to the fourth liquid inlet pipe, the third drive pump is configured to pump waste liquid into the holding cavity.

[0046] In the above technical solution, by providing a temporary storage tank, the stability of the first driving pump's delivery can be guaranteed, thereby achieving the continuity of waste liquid treatment, and thereby improving the waste liquid treatment rate.

[0047] In the second aspect, an embodiment of the present application also provides a solid-state battery production system, comprising: a stirring device and a waste liquid treatment device according to the first aspect of the present application, the waste liquid treatment device is used to treat the cleaning waste liquid in the stirring device, the stirring device has a waste liquid pipe, and the waste liquid pipe is connected to the first liquid inlet pipe.

[0048] In the above technical scheme, by setting up the waste liquid treatment device of the first aspect of the present application, the sulfide in the waste liquid generated in the solid-state battery production system can be fully treated, thereby reducing the probability of generating hydrogen sulfide during the waste liquid transportation process, thereby protecting the occupational health of operators. At the same time, by setting up a gas detector, over-treatment can be prevented, thereby reducing resource waste and improving economic efficiency.

[0049] In the third aspect, an embodiment of the present application further provides a waste liquid treatment method, which is used in a solid-state battery production system according to the second aspect of the present application, and the waste liquid treatment method includes: step S11, injecting waste liquid into a reaction tank; step S12, adding deionized water to the reaction tank in batches, and introducing nitrogen at the same time; step S13, detecting hydrogen sulfide in the reaction tank; step S14, confirming that hydrogen sulfide has not been detected for a preset time, and then the waste liquid treatment in the reaction tank is terminated.

[0050] In the above technical scheme, by using the waste liquid treatment device of the first aspect to treat the waste liquid, the sulfide in the waste liquid can be fully treated, thereby reducing the probability of hydrogen sulfide being produced during the transportation of the waste liquid, thereby protecting the occupational health of the operators. At the same time, over-treatment can be prevented, thereby reducing resource waste and improving economic efficiency.

[0051] In some embodiments, the preset time is 15 min-25 min.

[0052] In the above technical solution, by setting the preset time to 15min-25min, the time can be prevented from being too long, thereby causing problems such as too low processing rate and waste of resources. At the same time, the preset time is not too short, thereby effectively preventing the occurrence of incomplete processing.

[0053] In some embodiments, the waste liquid treatment device also includes: a standing tank, the liquid inlet end of the standing tank is connected to the liquid outlet end of the reaction tank, and the waste liquid treatment method also includes: transferring the treated liquid obtained after the reaction in the reaction tank to the standing tank and standing until stratification.

[0054] In the above technical solution, by transferring the treated liquid obtained after the reaction in the reaction tank to a standing tank and standing it until stratification, water and trimethylol can be treated separately, thereby reducing the cost of waste liquid transfer treatment.

[0055] In some embodiments, the waste liquid treatment device also includes: a solid-liquid separator, which is connected between the reaction tank and the standing tank, and transfers the treated liquid obtained after the reaction in the reaction tank to the standing tank and stands until stratification, including: step S21, pumping out the treated liquid formed after the reaction in the reaction tank; step S22, opening the solid-liquid separator to separate solids and liquids; step S23, driving the liquid into the standing tank and standing until stratification.

[0056] In the above technical solution, by opening the solid-liquid separator to separate the solid and the liquid, the solid waste and the liquid waste in the treatment liquid can be treated in a targeted manner, thereby improving the treatment efficiency of the overall process.

[0057] In some embodiments, the waste liquid treatment device also includes: a transfer tank, which is connected to the standing tank, and the waste liquid treatment method also includes: step S31, transferring the upper liquid in the standing tank to the transfer tank; step S32, introducing nitrogen into the transfer tank to replace the air in the transfer tank.

[0058] In the above technical solution, by setting up a transfer tank, the upper liquid in the static tank can be transferred to a professional department for treatment; by introducing nitrogen into the transfer tank to isolate oxygen among the three elements of combustion, the risk of explosion of the trimethylol solution can be further reduced.

[0059] 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

[0060] Figure 1 is a schematic diagram of a solid-state battery production system according to an embodiment of the present application; Figure 2 is a schematic diagram of the connection between the reaction tank and other components according to an embodiment of the present application; Figure 3 is a schematic diagram of the connection between the static tank and other components according to an embodiment of the present application; Figure 4 is a schematic diagram of the connection between the transfer tank and other components according to an embodiment of the present application; Figure 5 This is a schematic diagram of the connection between the temporary storage tank and other components according to an embodiment of the present application.

[0061] Reference numerals: 1000. Solid-state battery production system; 100. Waste liquid treatment device; 10. reaction tank; 11. first liquid inlet pipe; 12. second liquid inlet pipe; 13. nozzle; 14. first driving pump; 15. gas detector; 16. first detection assembly; 161. liquid level meter; 162. weighing sensor; 163. high liquid level sensor; 164. actuator; 1641. gas pipe; 1642. control valve; 20. Standing tank; 21. Third liquid inlet pipe; 22. Second driving pump; 23. Oil-water interface measuring instrument; 24. Second detection assembly; 30. Solid-liquid separator; 40. transfer tank; 41. transfer pump; 42. third detection component; 50. Temporary storage tank; 51. Fourth liquid inlet pipe; 52. Third driving pump; 53. Fourth detection assembly; 200. Stirring device; 300. Central control system. DETAILED DESCRIPTION

[0062] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0064] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0065] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0066] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0067] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0068] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0069] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0070] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0071] In the relevant technology, a large amount of waste liquid is generated during the production process of solid-state batteries, and these waste liquids contain a large amount of trimethylbenzene, sulfide and chloride ions. Due to the presence of these substances, solid-state battery waste liquid needs to be transferred to a manufacturer with professional qualifications for treatment. However, due to the large amount of sulfide contained in the waste liquid, when it comes into contact with air, water and other substances during the transportation and treatment of the waste liquid, it is very easy to produce hydrogen sulfide, sulfurous acid and other substances that are harmful to the human body, which will threaten the occupational health of operators.

[0072] Based on the above considerations, in order to solve the problem that a large amount of sulfide contained in the waste liquid is very likely to produce hydrogen sulfide, sulfurous acid and other substances harmful to the human body during the waste liquid transportation and treatment process, posing a threat to the occupational health of operators, the present application proposes a waste liquid treatment device, which includes: a reaction tank and a gas detector, wherein the reaction tank has a reaction chamber, and the waste liquid is suitable for chemical reaction in the reaction chamber to generate hydrogen sulfide; the gas detector is installed in the reaction tank, and is used to detect the hydrogen sulfide in the reaction tank. In this way, the sulfide in the waste liquid can be fully treated before the waste liquid is transferred, thereby reducing the probability of hydrogen sulfide being generated during the waste liquid transportation process, thereby protecting the occupational health of operators. At the same time, by setting up a gas detector, over-treatment can also be prevented, thereby reducing resource waste and improving economic efficiency.

[0073] Reference below Figure 1-Figure 5 A waste liquid treatment device 100 according to an embodiment of the first aspect of the present application is described. Figure 1 is a schematic diagram of a solid-state battery production system 1000 according to an embodiment of the present application, Figure 2 is a schematic diagram of the connection between the reaction tank 10 and other components according to an embodiment of the present application, Figure 3 is a schematic diagram of the connection between the static tank 20 and other components according to an embodiment of the present application, Figure 4 is a schematic diagram of the connection between the transfer tank 40 and other components according to an embodiment of the present application; Figure 5 It is a schematic diagram of the connection between the temporary storage tank 50 and other components according to an embodiment of the present application.

[0074] The embodiment of the present application provides a waste liquid treatment device 100, referring to Figure 1-Figure 2 The waste liquid treatment device 100 is used to treat the waste liquid generated in the production process of the solid-state battery. The waste liquid treatment device 100 includes: a reaction tank 10, a first liquid inlet pipe 11, a second liquid inlet pipe 12, a first exhaust pipe, a first driving pump 14 and a gas detector 15.

[0075] Specifically, the reaction tank 10 has a reaction chamber, and the waste liquid is suitable for chemically reacting in the reaction chamber to generate hydrogen sulfide. It is understood that the reaction tank 10 is a reaction container that can store waste liquid, and the waste liquid can chemically react in the reaction chamber in the reaction tank 10. It should be noted that the reaction tank 10 can be a reactor or a storage tank with certain strength and corrosion resistance.

[0076] The first liquid inlet pipe 11 is connected to the reaction tank 10, and is serially connected with a first driving pump 14 for conveying waste liquid to the reaction chamber. The first liquid inlet pipe 11 has a circulation channel, and the circulation channel is suitable for the circulation of waste liquid. The first driving pump 14 is serially connected to the first liquid inlet pipe 11, and is used to drive the circulation of waste liquid in the first liquid inlet pipe 11 to provide driving force.

[0077] The second liquid inlet pipe 12 is connected to the reaction tank 10, and is used to transport a solution that reacts with the sulfide in the waste liquid. Specifically, the second liquid inlet pipe 12 has a fluid channel, and the solution that reacts with the sulfide can be input into the reaction chamber of the reaction tank 10 through the fluid channel to react with the sulfide in the waste liquid. It should be noted that the solution that reacts with the sulfide can be selected according to actual processing requirements.

[0078] The first exhaust pipe is connected to the reaction tank 10 and is used to exhaust the gas in the reaction chamber. Specifically, the first exhaust pipe is mainly used to exhaust hydrogen sulfide to prevent hydrogen sulfide from overflowing from the reaction tank 10 and causing damage to the human body.

[0079] The gas detector 15 is installed in the reaction tank 10 to detect the hydrogen sulfide in the reaction tank 10. Specifically, the gas detector 15 is mainly used to detect the concentration of hydrogen sulfide in the reaction tank 10, so as to indirectly detect whether the sulfide in the waste liquid in the reaction tank 10 is fully reacted, thereby preventing the occurrence of incomplete treatment and over-treatment.

[0080] Specifically, the treatment process of the waste liquid in the reaction tank 10 is as follows: first, the first driving pump 14 is started, and the first driving pump 14 drives the waste liquid into the reaction tank 10 through the first liquid inlet pipe 11, and then, the first driving pump 14 is turned off, and then a solution that reacts with the sulfide in the waste liquid is added to the reaction tank 10 through the second liquid inlet pipe 12. At the same time, the first exhaust pipe is opened, so that the hydrogen sulfide generated by the reaction is discharged from the reaction tank 10 through the first exhaust pipe. At the same time, the gas detector 15 monitors the concentration of hydrogen sulfide in the reaction tank 10 in real time. When hydrogen sulfide is not detected for a certain period of time, the waste liquid treatment in the reaction tank 10 is completed.

[0081] In the above technical solution, by setting up the reaction tank 10 and the gas detector 15, the sulfide in the waste liquid can be fully treated before the waste liquid is transferred, thereby reducing the probability of generating hydrogen sulfide during the waste liquid transportation process, thereby protecting the occupational health of the operators. At the same time, by setting up the gas detector 15, over-treatment can be prevented, thereby reducing resource waste and improving economic efficiency.

[0082] In some embodiments, reference Figure 2 The waste liquid treatment device 100 further includes: a first detection component 16, which is disposed on the reaction tank 10 and is used to detect the liquid capacity in the reaction chamber in real time.

[0083] It should be noted that the first detection component 16 can detect the liquid capacity in the reaction chamber in real time in a variety of ways. For example, the liquid level height can be detected by the liquid level meter 161, and then the liquid capacity in the reaction chamber can be calculated by the size of the reaction chamber. It can also be detected by the overall weight of the reaction tank 10, and then the liquid capacity in the reaction chamber can be calculated by converting the mass fraction of the waste liquid.

[0084] In the above technical solution, by setting up the first detection component 16, the liquid capacity in the reaction chamber can be detected in real time, so that when the waste liquid is transported into the reaction chamber, the occurrence of bubbling can be effectively prevented. At the same time, it is also possible to determine whether leakage occurs by detecting the liquid capacity, which can help the staff to promptly discover potential leakage problems and quickly take corresponding measures, thereby reducing the risks and losses in the waste liquid treatment process.

[0085] In some embodiments, reference Figure 2 The first detection component 16 includes: a liquid level meter 161, used to detect the liquid level height in the reaction tank 10; and / or a weighing sensor 162, used to detect the weight of the reaction tank 10; and / or a high liquid level sensor 163, which is used to detect the highest liquid level in the reaction tank 10.

[0086] It is understandable that the first detection component 16 may include one or more of a liquid level meter 161 , a weighing sensor 162 and a high liquid level sensor 163 .

[0087] The liquid level meter 161 is mainly used to detect the liquid level in the reaction tank 10, so that the amount of liquid inflow can be directly reflected, thereby more effectively controlling the amount of liquid inflow, and thus preventing the reaction tank 10 from bubbling. It should be noted that there are many types of liquid level meters 161, such as ultrasonic liquid level meters 161, radar liquid level meters 161, magnetic flap liquid level meters 161, etc.

[0088] The weighing sensor 162 is mainly used to detect the weight of the reaction tank 10 and estimate the liquid capacity in the reaction tank 10 by weight. The weighing sensor 162 is mainly arranged on the outside of the reaction tank 10. Therefore, it can be understood that the weighing sensor 162 does not contact the waste liquid and is not affected by the surface state of the liquid, thereby improving the measurement accuracy and system reliability.

[0089] The high liquid level sensor 163 is used to detect the maximum liquid level in the reaction tank 10. When the liquid in the reaction tank 10 reaches the maximum liquid level, the staff can close the liquid inlet of the reaction tank 10, thereby effectively preventing the reaction tank 10 from bubbling.

[0090] Optionally, the first detection component 16 includes: a liquid level meter 161, a weighing sensor 162 and a high liquid level sensor 163, wherein the detection results of the liquid level meter 161 and the weighing sensor 162 are linked and checked against each other. When the two conversion results are inconsistent, it is determined that an abnormality occurs in the inlet and outlet of the liquid. At this time, the control system immediately takes emergency measures such as stopping the pump, closing the valve, and issuing an alarm.

[0091] In the above technical scheme, by setting the first detection component 16 including a liquid level meter 161, the liquid intake amount can be intuitively reflected, thereby, the liquid intake amount can be more effectively controlled, and further, the reaction tank 10 can be prevented from bubbling; by setting the first detection component 16 including a weighing sensor 162, it can be unaffected by the liquid surface state, thereby improving the measurement accuracy and system reliability; by setting the first detection component 16 including a high liquid level sensor 163, the reaction tank 10 can be further prevented from bubbling.

[0092] In some embodiments, reference Figure 2 The first detection assembly 16 further includes: an actuator 164, which is configured to stop the first liquid inlet pipe 11 from transporting the waste liquid to the reaction chamber when the waste liquid reaches a maximum liquid level.

[0093] It can be understood that the actuator 164 of the present application is linked to the high liquid level sensor 163. When the high liquid level sensor 163 detects that the waste liquid reaches the highest liquid level, the actuator 164 is activated to stop the first liquid inlet pipe 11 from transporting the waste liquid to the reaction chamber.

[0094] It should be noted that the actuator 164 includes multiple types. For example, the actuator 164 operates a valve or a pump according to the instruction of the controller to stop the input of waste liquid. For example, when the high liquid level sensor 163 detects that the waste liquid has reached the highest liquid level, it sends an alarm signal to the central control system 300. The central control system 300 receives and controls the first drive pump 14 to stop running or close the liquid inlet valve on the first liquid inlet pipe 11, thereby stopping the delivery of liquid to the reaction chamber.

[0095] In the above technical solution, by setting the actuator 164, the waste liquid can be stopped from being transported to the reaction chamber when the waste liquid reaches the highest liquid level. In this way, the reaction tank 10 can be prevented from bubbling, thereby reducing the probability of danger in the waste liquid treatment process.

[0096] In some embodiments, reference Figure 2 The first driving pump 14 is a pneumatic pump, and the actuator 164 includes: an air pipe 1641 and a control valve 1642. The air pipe 1641 is connected to the pneumatic pump and is used to provide compressed air to the pneumatic pump. The control valve 1642 is connected in series to the air pipe 1641. When the waste liquid reaches the highest liquid level, the control valve 1642 is closed to stop supplying air to the pneumatic pump.

[0097] Specifically, the pneumatic pump is a pump that uses compressed air as a power source. Therefore, when the waste liquid reaches the highest liquid level, the control valve 1642 is closed, and the air supply to the pneumatic pump is stopped, thereby stopping the pneumatic pump from running, thereby achieving the goal of pumping the waste liquid into the reaction tank 10.

[0098] For example Figure 2As shown, the high liquid level sensor 163 and the actuator 164 are combined to form a float liquid level switch assembly, which includes: a float liquid level switch and an air pipe 1641, wherein the float liquid level switch and parts of the air pipe 1641 are arranged in the reaction chamber, and the float liquid level switch includes: a float, a connecting rod and a ball valve, the ball valve is connected in series to the air pipe 1641, and is connected to the float through the connecting rod. When the pneumatic pump is normally filled with liquid, the ball valve is in an open state, and the air pipe 1641 provides air intake for the ball valve. When the waste liquid gradually rises in the reaction chamber, the waste liquid drives the float to rise. When the highest liquid level is reached, the float drives the ball valve through the connecting rod to close the gas channel of the air pipe 1641, thereby stopping the pneumatic pump from running, thereby achieving pumping of waste liquid into the reaction tank 10.

[0099] In the above technical solution, by providing the actuator 164 including: an air pipe 1641 and a control valve 1642 , the overall structure of the first detection component 16 can be simplified, thereby reducing the production cost of the first detection component 16 .

[0100] In some embodiments, the waste liquid treatment device 100 further includes: a first air inlet pipe, which is connected to the reaction tank 10 and is used to provide inert gas to the reaction tank 10 so that hydrogen sulfide is discharged from the reaction tank 10 through the first exhaust pipe.

[0101] Among them, inert gas refers to a class of elements that are not easy to react chemically with other substances at normal temperature and pressure, and its chemical stability is relatively high. There are many types of inert gases, such as argon, helium, neon, nitrogen, etc.

[0102] Optionally, the inert gas of the present application is nitrogen, wherein the chemical properties of nitrogen are relatively stable and the cost is relatively low. Therefore, using nitrogen as the inert gas can further reduce the cost in the waste liquid treatment process.

[0103] In the above technical solution, by providing the first air inlet pipe to the reaction tank 10 with inert gas, the hydrogen sulfide in the reaction tank 10 can be quickly discharged, thereby improving the waste liquid treatment efficiency; at the same time, due to the good stability of the inert gas, the risk in the waste liquid treatment process can also be reduced.

[0104] In some embodiments, reference Figure 2 A nozzle 13 is provided at the outlet end of the second liquid inlet pipe 12 . The nozzle 13 is disposed in the reaction tank 10 and is used to spray deionized water into the reaction tank 10 .

[0105] Deionized water is mainly used as a solvent to help sulfide dissolve and release sulfur ions, thereby promoting the production of hydrogen sulfide. Deionized water is sprayed into the reaction tank 10 through the nozzle 13, so that the uniformity of the distribution of the liquid in the entire tank can be improved, and the mixing of the waste liquid and the deionized water can be better promoted, thereby improving the production efficiency of hydrogen sulfide.

[0106] In the above technical solution, by providing the nozzle 13, the uniformity of the distribution of the liquid in the entire tank body can be improved, thereby better promoting the mixing of the waste liquid and the deionized water, thereby improving the efficiency of hydrogen sulfide generation.

[0107] In some embodiments, reference Figure 1 and Figure 3 The waste liquid treatment device 100 also includes: a standing tank 20, a third liquid inlet pipe 21 and a second driving pump 22 connected in series to the third liquid inlet pipe 21. The standing tank 20 is used for standing and separating the treated liquid obtained after being treated in the reaction tank 10; the third liquid inlet pipe 21 is connected between the reaction tank 10 and the standing tank 20; the second driving pump 22 is used for pumping the treated liquid into the standing tank 20.

[0108] Specifically, the third liquid inlet pipe 21 cooperates with the second driving pump 22 to allow the treated liquid in the reaction tank 10 to enter the static tank 20 for storage and static storage. The second driving pump 22 is mainly used to provide driving force for the circulation of the treated liquid.

[0109] It should be noted that the treatment liquid includes trimethylol and water, wherein trimethylol is insoluble in water. Therefore, the treatment liquid will be stratified after standing in the standing tank 20. In this way, after standing and stratifying, the water can be discharged and only the trimethylol can be treated. It should be further noted that the trimethylol solution needs to be centrally treated by a professional organization, thereby reducing the cost of transferring and treating the waste liquid.

[0110] In the above technical solution, by setting up the static tank 20, the separation of water and trimethylolus can be achieved, so that only trimethylolus can be processed, thereby reducing the cost of transferring and processing the waste liquid.

[0111] In some embodiments, reference Figure 3 The waste liquid treatment device 100 further includes: an oil-water interface measuring instrument 23 , which is installed on the static tank 20 and is used to measure the oil-water interface of the liquid in the static tank 20 .

[0112] It should be noted that the oil-water interface measuring instrument 23 is a device specifically used to detect and monitor the position of the oil-water interface in the oil-water mixture. There are many types of oil-water interface measuring instruments, such as a float level gauge 161, a capacitive level gauge 161, an ultrasonic level gauge 161, and the like.

[0113] In the above technical solution, the oil-water interface measuring instrument 23 is provided to help separate water from the organic solvent, thereby effectively removing water from the treatment liquid, thereby reducing the cost of transfer treatment.

[0114] In some embodiments, reference Figure 3 The waste liquid treatment device 100 further includes: a second detection component 24, which is disposed on the static tank 20 and is used to detect the liquid capacity in the static tank 20 in real time.

[0115] It should be noted that the structure of the second detection component 24 can be the same as that of the first detection component 16. The second detection component 24 includes: one or more of a liquid level meter 161, a weighing sensor 162 and a high liquid level sensor 163, wherein the liquid level meter 161 is used to detect the liquid level height in the static tank 20; the weighing sensor 162 is used to detect the weight of the static tank 20; and the high liquid level sensor 163 is used to detect the highest liquid level in the static tank 20.

[0116] In the above technical solution, by setting up the second detection component 24, the liquid capacity in the static tank 20 can be detected in real time, so that when the waste liquid is transported into the static tank 20, the occurrence of bubbling can be effectively prevented. At the same time, it is also possible to determine whether leakage occurs by detecting the liquid capacity, which can help the staff to promptly discover potential leakage problems and quickly take corresponding measures, thereby reducing the risks and losses in the waste liquid treatment process.

[0117] In some embodiments, reference Figure 1 The waste liquid treatment device 100 further includes: a solid-liquid separator 30 , which is used for solid-liquid separation and is connected in series between the reaction tank 10 and the second driving pump 22 .

[0118] The solid-liquid separator 30 is mainly used to separate the solid from the liquid to make the liquid enter the static tank 20 through the second driving pump 22 for static treatment, and the solid waste is sent to the solid waste treatment site.

[0119] It should be noted that the solid waste in the treatment liquid of the present application is mainly ternary powder and reaction gel.

[0120] Optionally, the solid-liquid separator 30 of the present application is a rotary wet-dry filter, wherein the rotary wet-dry filter mainly realizes solid-liquid separation through a rotating component, wherein the rotary wet-dry filter has a high processing rate and can quickly and effectively separate solids and liquids, thereby improving work efficiency.

[0121] Optionally, the solid-liquid separator 30 is used in one and is in standby mode. Thus, when one of the solid-liquid separators is damaged and needs to be repaired, the other one can be started, thereby ensuring the normal operation of the waste liquid treatment and improving the rate of waste liquid treatment.

[0122] In the above technical solution, by providing the solid-liquid separator 30, the solid waste and liquid waste in the waste liquid treatment device 100 can be treated specifically, thereby improving the treatment efficiency of the overall process.

[0123] In some embodiments, the waste liquid treatment device 100 further includes: a transfer tank 40 and a transfer pump 41 . The transfer tank 40 is connected to the static tank 20 . The transfer pump 41 is used to transfer the organic solvent in the static tank 20 to the transfer tank 40 .

[0124] The transfer tank 40 is mainly used to store and transfer the organic solvent in the static tank 20, so that the organic solvent can be transferred to a relevant processing mechanism for processing. The transfer pump 41 mainly provides a driving force for the transfer of the organic solvent. It should be noted that the organic solvent is a trimethylol solution.

[0125] Optionally, the transfer pump 41 is a pneumatic pump, wherein since the pneumatic pump is driven by compressed air instead of electricity, it has better explosion-proof performance and can be used in flammable and explosive environments.

[0126] In the above technical solution, by providing a transfer tank 40 and a transfer pump 41, the organic solvent can be transferred to a relevant processing institution for centralized processing.

[0127] In some embodiments, the transfer tank 40 is an explosion-proof tank.

[0128] Among them, explosion-proof tanks are containers specially designed for the safe storage and transportation of explosives or potentially explosive dangerous goods.

[0129] It should be noted that explosion-proof tanks are generally metal tanks, for example, metal tanks made of 316 stainless steel, metal tanks made of 304 stainless steel, and the like.

[0130] In the above technical solution, by setting the transfer tank 40 as an explosion-proof tank, the explosion risk during the transfer and processing of trimethylol can be further reduced.

[0131] In some embodiments, an anti-corrosion component is provided on the inner wall of the transfer tank 40 .

[0132] Among them, anti-corrosion parts refer to parts made of specific materials or processing techniques and have the ability to resist corrosion. It should be noted that wastewater contains a large amount of chloride ions. Therefore, anti-corrosion parts are provided on the inner wall of the transfer tank 40 to effectively prevent chloride ions from corroding the explosion-proof tank, thereby further improving the service life and reliability of the transfer tank 40.

[0133] It should be further explained that the anti-corrosion part can be a lining or a coating, which is not limited to this in the present application; the material of the anti-corrosion part can be polytetrafluoroethylene, polyvinylidene fluoride and other materials resistant to chemical corrosion, and the specific material can be selected according to actual needs.

[0134] In the above technical solution, by providing anti-corrosion parts on the inner wall of the transfer tank 40, the corrosion of the transfer tank 40 caused by the waste liquid can be effectively reduced, thereby further improving the service life and reliability of the transfer tank 40.

[0135] In some embodiments, the anti-corrosion member is a Teflon member.

[0136] Among them, the Teflon parts are polytetrafluoroethylene parts, and the polytetrafluoroethylene parts have good chemical resistance and good thermal stability. Therefore, the anti-corrosion parts are Teflon parts, which can improve the durability of the transfer tank 40, and then improve the use reliability of the transfer tank 40, and at the same time can reduce maintenance costs and reduce the maintenance costs of the waste liquid treatment device 100.

[0137] In the above technical solution, by setting the anti-corrosion parts to Teflon parts, the durability of the transfer tank 40 can be improved, and then the reliability of the use of the transfer tank 40 can be improved. At the same time, the maintenance cost can be reduced, and the maintenance cost of the waste liquid treatment device 100 can be reduced.

[0138] In some embodiments, the thickness of the Teflon piece ranges from 0.4 mm to 0.5 mm.

[0139] For example, the thickness of the Teflon piece may range from 0.4 mm, 0.45 mm, or 0.5 mm.

[0140] In the above technical solution, by setting the thickness of the Teflon part to 0.4mm-0.5mm, the anti-corrosion part can meet the anti-corrosion conditions without being too thick, thereby reducing the production cost of the entire transfer tank 40.

[0141] In some embodiments, the waste liquid treatment device 100 further includes: a second air inlet pipe, which is connected to the transfer tank 40 to provide inert gas into the transfer tank 40.

[0142] Among them, inert gas refers to a class of elements that are not easy to react chemically with other substances at normal temperature and pressure, and its chemical stability is relatively high. There are many types of inert gases, such as argon, helium, neon, nitrogen, etc.

[0143] It should be noted that the second air inlet pipe is connected to the transfer tank 40 to provide inert gas to the transfer tank 40 to replace the air in the transfer tank 40, so that there is no oxygen in the transfer tank 40. It should be further noted that the transfer tank 40 mainly stores a trimethylol solution, which has the characteristics of low flash point and easy explosion. Therefore, by providing a second air inlet pipe to provide inert gas to the transfer tank 40, oxygen in the three elements of combustion can be isolated, thereby further reducing the risk of explosion of the trimethylol solution.

[0144] In the above technical solution, by providing a second air inlet pipe to provide inert gas into the transfer tank 40, oxygen among the three elements of combustion can be isolated, thereby further reducing the risk of explosion of the trimethylol solution.

[0145] In some embodiments, the inert gas is nitrogen.

[0146] Among them, the chemical properties of nitrogen are relatively stable and the cost is relatively low. Therefore, using nitrogen as the inert gas can further reduce the cost in the waste liquid treatment process.

[0147] In the above technical solution, by setting the inert gas to nitrogen, the cost in the waste liquid treatment process can be further reduced.

[0148] In some embodiments, the transfer tank 40 is provided with: a detection device, wherein the detection device is provided on the transfer tank 40 and is used to detect the liquid level, temperature and / or oxygen concentration in the transfer tank 40 in real time; It is understandable that the detection device includes at least one detector for real-time detection of one or more of the liquid level, temperature and oxygen concentration in the transfer tank 40. For example, when the detection device is used to detect the liquid level in the transfer tank 40, the detector may be a liquid level meter 161; when the detection device is used to detect the temperature in the transfer tank 40, the detector may be a temperature sensor; when the detection device is used to detect the oxygen concentration in the transfer tank 40, the detector may be an oxygen concentration detector.

[0149] It should be noted that the detection device is used to detect the liquid level of the transfer tank 40, mainly used to detect the real-time liquid level in the transfer tank 40. In this way, when the transfer pump is used to inject liquid into the transfer tank 40, real-time monitoring can be carried out to prevent bubbling. When a certain amount of solution is stored in the transfer tank 40, it is also possible to determine whether leakage occurs by detecting the liquid level, which can help staff to promptly discover potential leakage problems and take corresponding measures to reduce risks and losses.

[0150] The detection device is used to detect the temperature in the transfer tank 40, and can indirectly detect whether the solution in the transfer tank 40 has potential explosion and combustion problems, so that corresponding measures can be taken to reduce the risk of explosion and losses.

[0151] The detection device is used to detect the oxygen concentration in the transfer tank 40, mainly used to detect whether the oxygen in the transfer tank 40 is discharged when nitrogen replaces the air in the transfer tank 40, thereby ensuring that there is no oxygen in the transfer tank 40, thereby reducing the risk of explosion of the trimethylol solution.

[0152] It should be further explained that when the detection device is used to detect the liquid level of the transfer tank 40, the detector used can be a third detection component 42 that is the same as the first detection component 16 and the second detection component 24, and the specific components are not described in detail in this embodiment.

[0153] Optionally, the detection device also has an alarm function, such as a low liquid level alarm, a high liquid level alarm, an over-temperature alarm, etc. This allows operators to more clearly and quickly discover the existence of problems, thereby improving processing speed and effectively reducing the probability of accidents.

[0154] The transfer tank 40 is also provided with a pressure relief mechanism, which is arranged on the transfer tank 40 and is used to release the pressure in the transfer tank 40 .

[0155] Among them, the pressure relief mechanism is mainly used to automatically release the pressure when the pressure in the tank exceeds the set range, thereby preventing explosions or other safety accidents caused by overpressure.

[0156] It should be noted that the pressure relief mechanism may be a valve for releasing pressure, such as an explosion-proof valve or a safety valve.

[0157] In the above technical scheme, by setting up a detection device, the liquid level, temperature and / or oxygen concentration in the transfer tank 40 can be detected in real time, and then it can be indirectly detected whether the solution in the transfer tank 40 has potential leakage, explosion and combustion problems, so that corresponding measures can be taken quickly, thereby reducing the risk of explosion and loss; by setting up a pressure relief mechanism, the pressure can be automatically released when the pressure in the transfer tank 40 exceeds the set range, thereby preventing explosions or other safety accidents caused by overpressure.

[0158] In some embodiments, reference Figure 4 The waste liquid treatment device 100 also includes: a third detection component 42, which is arranged on the transfer tank 40 and is used to detect the liquid capacity in the transfer tank 40 in real time.

[0159] It should be noted that the structure of the third detection component 42 can be the same as that of the first detection component 16. The third detection component 42 includes: one or more of a liquid level meter 161, a weighing sensor 162 and a high liquid level sensor 163, wherein the liquid level meter 161 is used to detect the liquid level height in the transfer tank 40; the weighing sensor 162 is used to detect the weight of the transfer tank 40; and the high liquid level sensor 163 is used to detect the highest liquid level in the transfer tank 40.

[0160] In the above technical solution, by setting up the third detection component 42, the liquid capacity in the transfer tank 40 can be detected in real time, so that when the waste liquid is transported into the transfer tank 40, it is possible to effectively prevent the occurrence of overflow. At the same time, it is also possible to determine whether leakage occurs by detecting the liquid capacity, which can help the staff to promptly discover potential leakage problems and quickly take corresponding measures, thereby reducing the risks and losses in the waste liquid transportation process.

[0161] In some embodiments, reference Figure 1 and Figure 5 The waste liquid treatment device 100 also includes: a temporary storage tank 50, a fourth liquid inlet pipe 51 and a third driving pump 52 connected in series to the fourth liquid inlet pipe 51, wherein the temporary storage tank 50 has a containing chamber, the containing chamber is configured to store waste liquid, and the temporary storage tank 50 is connected to the reaction tank 10 through the first liquid inlet pipe 11; the fourth liquid inlet pipe 51 is connected to the temporary storage tank 50, and is used to transport the waste liquid into the containing chamber; the third driving pump 52 is configured to pump the waste liquid into the containing chamber.

[0162] It can be understood that the waste liquid of the present application first enters the temporary storage tank 50 for storage, and then is sent to the reaction tank 10 through the first driving pump 14 and the first liquid inlet pipe 11 for reaction treatment. In this way, the stability of transportation can be guaranteed, the continuity of waste liquid treatment can be achieved, and the treatment rate of waste liquid can be improved.

[0163] In the above technical solution, by providing the temporary storage tank 50, the stability of the delivery of the first driving pump 14 can be guaranteed, thereby achieving the continuity of waste liquid treatment, and further improving the treatment rate of the waste liquid.

[0164] In some embodiments, reference Figure 5 The waste liquid treatment device 100 further includes: a fourth detection component 53, which is disposed on the temporary storage tank 50 and is used to detect the liquid capacity in the temporary storage tank 50 in real time.

[0165] It should be noted that the structure of the fourth detection component 53 can be the same as that of the first detection component 16. The fourth detection component 53 includes: one or more of a liquid level meter 161, a weighing sensor 162 and a high liquid level sensor 163, wherein the liquid level meter 161 is used to detect the liquid level height in the temporary storage tank 50; the weighing sensor 162 is used to detect the weight of the temporary storage tank 50; and the high liquid level sensor 163 is used to detect the highest liquid level in the temporary storage tank 50.

[0166] In the above technical solution, by setting up the fourth detection component 53, the liquid capacity in the temporary storage tank 50 can be detected in real time, so that when the waste liquid is transported into the temporary storage tank 50, it is possible to effectively prevent the occurrence of overflow. At the same time, it is also possible to determine whether leakage occurs by detecting the liquid capacity, which can help the staff to promptly discover potential leakage problems and quickly take corresponding measures, thereby reducing the risks and losses in the waste liquid transportation process.

[0167] Reference below Figure 1 A solid-state battery production system 1000 according to an embodiment of the second aspect of the present application is described. Figure 1 is a schematic diagram of a solid-state battery production system 1000 according to an embodiment of the present application.

[0168] An embodiment of the present application also provides a solid-state battery production system 1000, comprising: a stirring device 200 and a waste liquid treatment device 100 according to the first aspect of the present application, the waste liquid treatment device 100 is used to treat the cleaning waste liquid in the stirring device 200, the stirring device 200 has a waste liquid pipe, and the waste liquid pipe is connected to the first liquid inlet pipe 11.

[0169] Specifically, the stirring device 200 is a device in the solid-state battery production process, which is mainly used to stir the mixed slurry. After the production is completed, the stirring device 200 needs to be cleaned, and the waste liquid after cleaning enters the waste liquid treatment device 100 through the waste liquid pipe for treatment.

[0170] For example Figure 1 As shown, the solid-state battery production system 1000 also includes: a central control system 300, which is communicatively connected with the waste liquid treatment device 100 and the stirring device 200 to enhance the automation of the solid-state battery production system 1000.

[0171] In the above technical scheme, by setting up the waste liquid treatment device 100 of the first aspect of the present application, the sulfide in the waste liquid generated in the solid-state battery production system 1000 can be fully treated, thereby reducing the probability of generating hydrogen sulfide during the waste liquid transportation process, thereby protecting the occupational health of operators. At the same time, by setting up the gas detector 15, over-treatment can be prevented, thereby reducing resource waste and improving economic efficiency.

[0172] In a third aspect, an embodiment of the present application further provides a waste liquid treatment method, which is used in the solid-state battery production system 1000 according to the second aspect of the present application. The waste liquid treatment method includes: Step S11, injecting waste liquid into the reaction tank 10; Step S12, adding deionized water into the reaction tank 10 in portions, and introducing nitrogen at the same time; Step S13, detecting hydrogen sulfide in the reaction tank 10; Step S14, confirming that hydrogen sulfide is not detected within a preset time, and then the waste liquid treatment in the reaction tank 10 is completed.

[0173] Specifically, first, the reaction tank 10 sends a material request signal. At this time, the first drive pump 14 is started, and the first drive pump 14 drives the waste liquid into the reaction tank 10 through the first liquid inlet pipe 11. Then, the first drive pump 14 is turned off, and then deionized water is added to the reaction tank 10 in batches through the second liquid inlet pipe 12. At the same time, nitrogen is introduced into the reaction tank 10 to discharge the hydrogen sulfide produced by the reaction from the reaction tank 10. At the same time, the gas detector 15 monitors the concentration of hydrogen sulfide in the reaction tank 10 in real time. When hydrogen sulfide is not detected continuously within the preset time, the waste liquid treatment in the reaction tank 10 is completed.

[0174] It should be noted that when deionized water is added to the reaction tank 10 in batches, a certain time interval is required. At the same time, the amount of deionized water is kept consistent, and the specific dosage is calculated based on actual conditions.

[0175] In the above technical scheme, by using the waste liquid treatment device 100 of the first aspect to treat the waste liquid, the sulfide in the waste liquid can be fully treated, thereby reducing the probability of hydrogen sulfide being produced during the transportation of the waste liquid, thereby protecting the occupational health of the operators. At the same time, over-treatment can be prevented, thereby reducing resource waste and improving economic efficiency.

[0176] In some embodiments, the preset time is 15 min-25 min.

[0177] For example, the preset time may be 15 minutes, 20 minutes or 25 minutes.

[0178] In the above technical solution, by setting the preset time to 15min-25min, the time can be prevented from being too long, thereby causing problems such as too low processing rate and waste of resources. At the same time, the preset time is not too short, thereby effectively preventing the occurrence of incomplete processing.

[0179] In some embodiments, the waste liquid treatment device 100 also includes: a standing tank 20, the liquid inlet end of the standing tank 20 is connected to the liquid outlet end of the reaction tank 10, and the waste liquid treatment method also includes: transferring the treated liquid obtained after the reaction in the reaction tank 10 to the standing tank 20 and standing until stratification.

[0180] It should be noted that the treatment liquid includes trimethylol and water, wherein trimethylol is insoluble in water. Therefore, the treatment liquid will be stratified after standing in the standing tank 20. In this way, after standing and stratifying, the water can be discharged and only the trimethylol can be treated. It should be further noted that the trimethylol solution needs to be centrally treated by a professional organization, thereby reducing the cost of transferring and treating the waste liquid.

[0181] In the above technical solution, by transferring the treated liquid obtained after the reaction in the reaction tank 10 to the standing tank 20 and standing until stratification, water and trimethylol can be treated separately, thereby reducing the cost of waste liquid transfer treatment.

[0182] In some embodiments, the waste liquid treatment device 100 further includes: a solid-liquid separator 30, which is connected between the reaction tank 10 and the static tank 20. The treated liquid obtained after the reaction in the reaction tank 10 is transferred to the standing tank 20 and is allowed to stand until stratification, including: Step S21, pumping out the treatment liquid formed after the reaction in the reaction tank 10; Step S22, start the solid-liquid separator 30 to separate the solid and the liquid; Step S23, driving the liquid into the standing tank 20 to stand until stratification.

[0183] Specifically, the treated liquid formed after the reaction in the reaction tank 10 is first pumped out, the solid-liquid separator 30 is opened, and the pumped treated liquid flows into the solid-liquid separator 30. The solid-liquid separator 30 separates the treated liquid, and then the separated liquid is transported to the standing tank 20 and stood until stratification.

[0184] In the above technical solution, by opening the solid-liquid separator 30 to separate the solid and the liquid, the solid waste and the liquid waste in the treatment liquid can be treated specifically, thereby improving the treatment efficiency of the overall process.

[0185] In some embodiments, the waste liquid treatment device 100 further includes: a transfer tank 40, the transfer tank 40 is connected to the static tank 20, and the waste liquid treatment method further includes: Step S31, transferring the upper layer of liquid in the static tank 20 to the transfer tank 40; Step S32, introducing nitrogen into the transfer tank 40 to replace the air in the transfer tank 40.

[0186] It should be noted that the treatment liquid includes trimethylol and water, wherein trimethylol is insoluble in water and has a density less than that of water, so that when the treatment liquid is left standing in the standing tank 20, trimethylol floats on the upper side of the water. Therefore, when the trimethylol is transferred to the transfer tank 40, the water in the lower layer needs to be discharged first, and then the trimethylol in the upper layer needs to be pumped into the transfer tank 40. In addition, since the trimethylol solution has the characteristics of low flash point and easy explosion, after the trimethylol is transferred to the transfer tank 40, nitrogen is introduced into the transfer tank 40 to replace the air in the transfer tank 40, which can isolate oxygen in the three elements of combustion, thereby further reducing the risk of explosion of the trimethylol solution.

[0187] In the above technical solution, by setting up a transfer tank 40, the upper liquid in the static tank 20 can be transferred to a professional department for processing; by introducing nitrogen into the transfer tank 40 to isolate oxygen among the three elements of combustion, the risk of explosion of the trimethylol solution can be further reduced.

[0188] The following will refer to Figure 1-Figure 5 A solid-state battery production system 1000 according to a specific embodiment of the present application is described.

[0189] Reference Figure 1 The solid-state battery production system 1000 includes: a central control system 300, a stirring device 200 and a waste liquid treatment device 100, wherein the waste liquid treatment device 100 is used to treat the cleaning waste liquid in the stirring device 200; the stirring device 200 has a waste liquid pipe, and the stirring device 200 is connected to the waste liquid treatment device through the waste liquid pipe; the central control system 300 is communicatively connected with the stirring device 200 and the waste liquid treatment device 100.

[0190] Specifically, the waste liquid treatment device 100 includes: a plurality of tank bodies, the plurality of tank bodies include: a temporary storage tank 50, a reaction tank 10 and a standing tank 20, wherein the temporary storage tank 50, the reaction tank 10 and the standing tank 20 are connected in sequence, the temporary storage tank 50 has a containing cavity, and the containing cavity is configured to store waste liquid; the reaction tank 10 has a reaction cavity, and the waste liquid is suitable for chemically reacting in the reaction cavity to generate hydrogen sulfide; the standing tank 20 is used for standing and separating the treated liquid obtained after being treated by the reaction tank 10.

[0191] Specifically, the liquid inlet end of the temporary storage tank 50 is connected to the waste liquid pipe of the stirring device 200 through the fourth liquid inlet pipe 51, the liquid outlet end of the temporary storage tank 50 is connected to the liquid inlet end of the reaction tank 10 through the first liquid inlet pipe 11, and the liquid outlet end of the reaction tank 10 is connected to the liquid inlet end of the static tank 20 through the third liquid inlet pipe 21.

[0192] The waste liquid treatment device 100 also includes: multiple driving pumps, wherein the multiple driving pumps include: a first driving pump 14, a second driving pump 22 and a third driving pump 52. Specifically, the first driving pump 14 is connected in series to the first liquid inlet pipe 11, and is used to transport the waste liquid in the temporary storage tank 50 to the reaction tank 10. The second driving pump 22 is connected in series to the third liquid inlet pipe 21, and is used to transport the treated liquid after the reaction in the reaction tank 10 to the static tank 20. The third driving pump 52 is connected in series to the fourth liquid inlet pipe 51, and is used to transport the cleaning waste liquid in the stirring device 200 to the temporary storage tank 50 for storage.

[0193] The waste liquid treatment device 100 also includes: multiple detection components, wherein the multiple detection components include: a first detection component 16, a second detection component 24 and a fourth detection component 53, wherein the first detection component 16, the second detection component 24 and the fourth detection component 53 are respectively arranged on the reaction tank 10, the standing tank 20 and the temporary storage tank 50, for real-time detection of the liquid capacity in the reaction tank 10, the standing tank 20 and the temporary storage tank 50.

[0194] Specifically, the first detection component 16, the second detection component 24 and the fourth detection component 53 have the same structure, and all include: a liquid level meter 161 for detecting the liquid level height in the reaction tank 10, a weighing sensor 162 for detecting the weight of the reaction tank 10, a high liquid level sensor 163 for detecting the maximum liquid level in the reaction tank 10, and an actuator 164 configured to stop the driving pump when the waste liquid reaches the maximum liquid level.

[0195] Furthermore, the multiple driving pumps are all pneumatic pumps, and the high liquid level sensors 163 and the actuators 164 of the multiple detection sensors are combined to form a float liquid level switch assembly, which includes: a float liquid level switch and an air pipe 1641, wherein the float liquid level switch and parts of the air pipe 1641 are arranged in the reaction chamber, and the float liquid level switch includes: a float, a connecting rod and a ball valve, the ball valve is connected in series on the air pipe 1641, and is connected to the float through a connecting rod. When the pneumatic pump is normally filled with liquid, the ball valve is in an open state, and the air pipe 1641 provides air intake for the ball valve. When the waste liquid gradually rises in the multiple tanks, the waste liquid drives the float to rise. When the highest liquid level is reached, the float drives the ball valve through the connecting rod to close the gas channel of the air pipe 1641, thereby stopping the pneumatic pump.

[0196] The waste liquid treatment device 100 also includes: a first air inlet pipe, a first exhaust pipe, a gas detector 15, a second liquid inlet pipe 12 and a nozzle 13, wherein the first air inlet pipe, the first exhaust pipe, the gas detector 15, and the second liquid inlet pipe 12 are all arranged on the reaction tank 10 and are connected to the reaction chamber of the reaction tank 10.

[0197] Specifically, the first exhaust pipe is connected to the reaction tank 10 and is used to exhaust the gas in the reaction chamber; the first air inlet pipe is connected to the reaction tank 10 and is used to provide inert gas to the reaction tank 10 so that hydrogen sulfide can be discharged from the reaction tank 10 through the first exhaust pipe; the gas detector 15 is installed in the reaction tank 10 and is used to detect the hydrogen sulfide in the reaction tank 10; the nozzle 13 is arranged in the reaction tank 10 and is connected to the outlet end of the second liquid inlet pipe 12, and is used to spray deionized water into the reaction tank 10.

[0198] The waste liquid treatment device 100 also includes: an oil-water interface measuring instrument 23 and a solid-liquid separator 30, wherein the oil-water interface measuring instrument 23 is installed on the static tank 20, and is used to measure the oil-water interface of the liquid in the static tank 20; the solid-liquid separator 30 is used for solid-liquid separation, and the solid-liquid separator 30 is connected in series between the reaction tank 10 and the second driving pump 22.

[0199] The waste liquid treatment device 100 further includes: a transfer tank 40 and a transfer pump 41 , wherein the transfer tank 40 is connected to the static tank 20 , and the transfer pump 41 is used to transfer the organic solvent in the static tank 20 to the transfer tank 40 .

[0200] Specifically, the transfer tank 40 is an explosion-proof tank, and a Teflon lining is provided on the inner wall of the transfer tank 40. The transfer tank 40 is provided with: a detection device and a pressure relief mechanism, wherein the detection device is provided on the transfer tank 40 for real-time detection of the liquid level, temperature and / or oxygen concentration in the transfer tank 40, and the pressure relief mechanism is provided on the transfer tank 40 for releasing the pressure in the transfer tank 40.

[0201] The waste liquid treatment device 100 also includes: a second air inlet pipe, which is connected to the transfer tank 40 and is used to provide nitrogen to the transfer tank 40 to replace the air in the transfer tank 40.

[0202] The waste liquid treatment device 100 also includes: a third detection component 42, which is arranged on the transfer tank 40 and is used to detect the liquid capacity in the transfer tank 40 in real time. The third detection component 42 has the same structure as the first detection component 16.

[0203] Refer to the following Figure 1 A waste liquid treatment method for a solid-state battery production system 1000 is described.

[0204] First, the cleaning waste liquid generated by the stirring device 200 is pumped to the temporary storage tank 50 through the third driving pump 52 for storage. When the storage volume reaches a certain amount, the waste liquid treatment process is started.

[0205] First, the reaction tank 10 sends a material request signal to the central control system 300, and the central control system 300 controls the first driving pump 14 to start and transport waste liquid into the reaction tank 10. When a certain height is reached, the first driving pump 14 stops running, and then deionized water is added to the reaction tank 10 in batches through the second liquid inlet pipe 12. At the same time, nitrogen is introduced into the reaction tank 10 to discharge the hydrogen sulfide generated by the reaction from the reaction tank 10. At the same time, the gas detector 15 monitors the concentration of hydrogen sulfide in the reaction tank 10 in real time. When hydrogen sulfide is not detected within a preset time, the waste liquid treatment in the reaction tank 10 is terminated.

[0206] When the reaction in the reaction tank 10 is finished, the second driving pump 22 is turned on to pump out the treated liquid obtained after the reaction in the reaction tank 10. At the same time, the solid-liquid separator 30 is turned on to separate the solid and the liquid. The second driving pump 22 drives the liquid into the standing tank 20 to stand until stratification.

[0207] When the treated liquid in the static tank 20 is stratified, the transfer pump 41 is started to transfer the upper layer of liquid in the static tank 20 to the transfer tank 40, and nitrogen is introduced into the transfer tank 40 to displace the air in the transfer tank 40, thereby nitrogen sealing the liquid in the transfer tank 40.

[0208] In the above technical scheme, by setting up the waste liquid treatment device 100 of the first aspect of the present application, the sulfide in the waste liquid generated in the solid-state battery production system 1000 can be fully treated, thereby reducing the probability of generating hydrogen sulfide during the waste liquid transportation process, thereby protecting the occupational health of operators. At the same time, by setting up the gas detector 15, over-treatment can be prevented, thereby reducing resource waste and improving economic efficiency.

[0209] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A waste liquid treatment device, which is used to treat waste liquid generated in the production process of solid-state batteries, characterized in that: include: A reaction tank (10) having a reaction chamber, wherein the waste liquid is suitable for chemically reacting in the reaction chamber to generate hydrogen sulfide; A first liquid inlet pipe (11), connected to the reaction tank (10), and serially connected to a first driving pump (14) for conveying the waste liquid to the reaction chamber; A second liquid inlet pipe (12), connected to the reaction tank (10), for conveying a solution for reacting with the sulfide in the waste liquid; A first exhaust pipe connected to the reaction tank (10) and used to exhaust the gas in the reaction chamber; A gas detector (15) is installed in the reaction tank (10) and is used to detect hydrogen sulfide in the reaction tank (10).

2. The waste liquid treatment device according to claim 1, characterized in that: Also includes: A first detection component (16), wherein the first detection component (16) is arranged on the reaction tank (10) and is used for detecting the liquid volume in the reaction chamber in real time.

3. The waste liquid treatment device according to claim 2, characterized in that: The first detection component (16) comprises: a liquid level meter (161), used to detect the liquid level in the reaction tank (10); and / or, a weighing sensor (162), used for detecting the weight of the reaction tank (10); and / or, A high liquid level sensor (163) is used to detect the highest liquid level in the reaction tank (10).

4. The waste liquid treatment device according to claim 3, characterized in that: The first detection component (16) further comprises: an actuator (164) configured to stop the first liquid inlet pipe (11) from conveying the waste liquid to the reaction chamber when the waste liquid reaches a maximum liquid level.

5. The waste liquid treatment device according to claim 4, characterized in that: The first driving pump (14) is a pneumatic pump, The actuator (164) comprises: an air pipe (1641) and a control valve (1642); the air pipe (1641) is connected to the pneumatic pump and is used to provide compressed air to the pneumatic pump; the control valve (1642) is connected in series to the air pipe (1641); when the waste liquid reaches a maximum liquid level, the control valve (1642) is closed to stop supplying air to the pneumatic pump.

6. The waste liquid treatment device according to claim 1, characterized in that: Also includes: A first air inlet pipe is connected to the reaction tank (10) and is used to provide inert gas to the reaction tank (10) so that the hydrogen sulfide is discharged from the reaction tank (10) through the first exhaust pipe.

7. The waste liquid treatment device according to claim 1, characterized in that: A nozzle (13) is provided at the outlet end of the second liquid inlet pipe (12); the nozzle (13) is arranged in the reaction tank (10) and is used to spray deionized water into the reaction tank (10).

8. The waste liquid treatment device according to any one of claims 1 to 7, characterized in that: Also includes: A standing tank (20), the standing tank (20) is used for standing and separating the treated liquid obtained after being treated in the reaction tank (10); A third liquid inlet pipe (21), the third liquid inlet pipe (21) being connected between the reaction tank (10) and the static tank (20); The second driving pump (22) connected in series to the third liquid inlet pipe (21) is used to pump the treatment liquid into the static tank (20).

9. The waste liquid treatment device according to claim 8, characterized in that: Also includes: An oil-water interface measuring instrument (23) is installed on the static tank (20) and is used to measure the oil-water interface of the liquid in the static tank (20).

10. The waste liquid treatment device according to claim 8, characterized in that: Also includes: A second detection component (24), the second detection component (24) is arranged on the static tank (20) and is used to detect the liquid capacity in the static tank (20) in real time.

11. The waste liquid treatment device according to claim 8, characterized in that: Also includes: A solid-liquid separator (30), the solid-liquid separator (30) is used for solid-liquid separation, and the solid-liquid separator (30) is connected in series between the reaction tank (10) and the second driving pump (22).

12. The waste liquid treatment device according to claim 8, characterized in that: Also includes: A transfer tank (40) and a transfer pump (41), wherein the transfer tank (40) is connected to the static tank (20), and the transfer pump (41) is used to transfer the organic solvent in the static tank (20) to the transfer tank (40).

13. The waste liquid treatment device according to claim 12, characterized in that: The transfer tank (40) is an explosion-proof tank.

14. The waste liquid treatment device according to claim 13, characterized in that: An anti-corrosion component is provided on the inner wall of the transfer tank (40).

15. The waste liquid treatment device according to claim 14, characterized in that: The anti-corrosion component is a Teflon component.

16. The waste liquid treatment device according to claim 15, characterized in that: The thickness of the Teflon piece ranges from 0.4 mm to 0.5 mm.

17. The waste liquid treatment device according to claim 12, characterized in that: Also includes: A second air inlet pipe, the second air inlet pipe is connected to the transfer tank (40) and is used to provide inert gas into the transfer tank (40).

18. The waste liquid treatment device according to claim 17, characterized in that: The inert gas is nitrogen.

19. The waste liquid treatment device according to claim 12, characterized in that: The transfer tank (40) is provided with: a detection device, the detection device being arranged on the transfer tank (40) and being used for detecting the liquid level, temperature and / or oxygen concentration in the transfer tank (40) in real time; A pressure relief mechanism is provided on the transfer tank (40) and is used to release the pressure in the transfer tank (40).

20. The waste liquid treatment device according to claim 12, characterized in that: It also includes: a third detection component (42), which is arranged on the transfer tank (40) and is used to detect the liquid capacity in the transfer tank (40) in real time.

21. The waste liquid treatment device according to claim 1, characterized in that: Also includes: A temporary storage tank (50) having a receiving chamber, wherein the receiving chamber is configured to store the waste liquid, and the temporary storage tank (50) is connected to the reaction tank (10) via the first liquid inlet pipe (11); a fourth liquid inlet pipe (51), connected to the temporary storage tank (50), and used for conveying the waste liquid into the containing chamber; A third driving pump (52) is serially connected to the fourth liquid inlet pipe (51), and the third driving pump (52) is configured to pump the waste liquid into the containing chamber.

22. The waste liquid treatment device according to claim 21, characterized in that: Also includes: A fourth detection component (53), the fourth detection component (53) is arranged on the temporary storage tank (50) and is used to detect the liquid capacity in the temporary storage tank (50) in real time.

23. A solid-state battery production system, characterized in that: include: A stirring device and a waste liquid treatment device according to any one of claims 1 to 22, wherein the waste liquid treatment device is used to treat the cleaning waste liquid in the stirring device, and the stirring device has a waste liquid pipe, which is connected to the first liquid inlet pipe (11).

24. A method for treating waste liquid, characterized in that: The waste liquid treatment method is used in the solid-state battery production system according to claim 23, and the waste liquid treatment method comprises: Step S11, injecting waste liquid into the reaction tank (10); Step S12, adding deionized water into the reaction tank (10) in portions, and introducing nitrogen at the same time; Step S13, detecting hydrogen sulfide in the reaction tank (10); Step S14, confirming that hydrogen sulfide is not detected continuously within a preset time, and then the waste liquid treatment in the reaction tank (10) is completed.

25. The waste liquid treatment method according to claim 24, characterized in that: The preset time is 15min-25min.

26. The waste liquid treatment method according to claim 25, characterized in that: The waste liquid treatment device further comprises: a stationary tank (20), wherein the liquid inlet end of the stationary tank (20) is connected to the liquid outlet end of the reaction tank (10), and the waste liquid treatment method further comprises: The treated liquid obtained after the reaction in the reaction tank (10) is transferred to a standing tank (20) and allowed to stand until stratification.

27. The waste liquid treatment method according to claim 26, characterized in that: The waste liquid treatment device further comprises: a solid-liquid separator (30), wherein the solid-liquid separator (30) is connected between the reaction tank (10) and the static tank (20). The treated liquid obtained after the reaction in the reaction tank (10) is transferred to a standing tank (20) and allowed to stand until stratification, comprising: Step S21, pumping out the treatment liquid formed after the reaction in the reaction tank (10); Step S22, start the solid-liquid separator (30) to separate the solid and the liquid; Step S23, driving the liquid into a standing tank (20) to stand until stratification.

28. The waste liquid treatment method according to claim 26, characterized in that: The waste liquid treatment device further comprises: a transfer tank (40), wherein the transfer tank (40) is connected to the static tank (20), and the waste liquid treatment method further comprises: Step S31, transferring the upper layer of liquid in the static tank (20) to the transfer tank (40); Step S32, introducing nitrogen into the transfer tank (40) to replace the air in the transfer tank (40).

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