Apparatus for producing lithium sulfide
By designing a lithium sulfide preparation device, we have achieved efficient and environmentally friendly production of lithium sulfide, solved the problem that the preparation devices in the existing technology are not suitable, and improved production efficiency and product purity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN UNION SHINE NEW ENERGY SCI TECH CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-21
AI Technical Summary
Existing methods for preparing lithium sulfide suffer from problems such as high raw material costs, long reaction times, numerous impurities, severe environmental pollution, and complex reaction conditions. In particular, the lithium hydroxide sulfide method lacks a complete preparation apparatus.
A lithium sulfide preparation device was designed, comprising a reaction device, a hydrogen sulfide gas dust removal device, a dust removal liquid treatment device, a hydrogen sulfide heating device, and a hydrogen sulfide waste gas treatment device. Through continuous reaction and multi-stage treatment, the device achieves efficient production and resource recycling of lithium sulfide.
It has enabled continuous production of lithium sulfide, improved production efficiency, reduced costs, met environmental protection and safety requirements, and achieved a product purity of 99.99%, with a particle size superior to market products.
Smart Images
Figure CN224524703U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of solid-state battery manufacturing technology, and in particular to an apparatus for preparing lithium sulfide. Background Technology
[0002] Lithium sulfide, as a core raw material for sulfide solid-state batteries, plays a crucial role in the synthesis of solid electrolytes and as a high-energy-density cathode material. Existing technologies for preparing lithium sulfide mainly include ball milling, solvent methods, direct carbon composite methods, and lithium hydroxide sulfide methods. Specifically, 1) Ball milling: Under an inert gas atmosphere, elemental sulfur and metallic lithium / lithium hydride are mixed in a certain proportion and added to a ball mill jar for mechanical ball milling. After the reaction, under an argon atmosphere, the solid product from the ball mill jar (protected by an inert proton reagent) is removed and placed in a vacuum drying oven at 85℃-90℃ for 2-3 hours to obtain a solid powder product. Finally, the vacuum-packed sample is taken to a calcination chamber, placed in a tube furnace, and calcined using argon as an inert protective gas. This process uses a high-cost raw material (lithium hydride), has a long reaction time, and a low conversion rate. The resulting product contains many impurities such as lithium sulfate, which are difficult to purify and are not suitable for industrial mass production. 2) Solvent Method: This method involves reacting lithium / lithium compounds and sulfur / sulfur compounds in an organic solvent medium to prepare lithium sulfide. The organic solvents used in this process are flammable, explosive, and volatile, easily causing significant environmental pollution. Furthermore, the reaction products contain impurities such as lithium sulfide, requiring further purification. 3) Direct Carbon Composite Method: This method utilizes the strong reducing properties of carbon, directly adding carbon materials / carbon precursors to the lithium sulfide preparation reaction to synthesize lithium sulfide / carbon composite materials in a one-step process. However, the process technology still needs optimization and improvement, product quality is unstable, and the morphology of the composite material is poorly controllable. 4) Lithium Sulfide Hydroxide Method: This method involves mixing hydrogen sulfide gas and solid lithium oxide (or lithium hydroxide) in a reaction apparatus and heating them to directly generate lithium sulfide and water vapor. In this method, the toxicity of hydrogen sulfide gas is difficult to control, and the reaction conditions (temperature / protective atmosphere) are complex to control. Currently, there is no perfect preparation apparatus for this method. Summary of the Invention
[0003] The purpose of this application is to provide an apparatus for preparing lithium sulfide, so as to solve the problem that the preparation apparatus in the prior art is not suitable for preparing lithium sulfide by the lithium hydroxide sulfide method.
[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: This application provides an apparatus for preparing lithium sulfide, including a reaction device, a hydrogen sulfide gas dust removal device, a dust removal liquid treatment device, a hydrogen sulfide heating device, and a hydrogen sulfide waste gas treatment device. The reaction device has a reaction chamber containing powdered raw materials, hydrogen sulfide gas raw materials, and an inert gas. The product outlet of the reaction device is connected to a product receiving device for conveying the reacted lithium sulfide product to the product receiving device. The inlet of the hydrogen sulfide gas dust removal device is connected to the gas outlet of the reaction device for receiving water vapor, excess hydrogen sulfide gas, inert gas, and lithium sulfide dust from the reaction device. The inlet of the dust removal liquid treatment device is connected to the liquid outlet of the hydrogen sulfide gas dust removal device for receiving the liquid from the hydrogen sulfide gas dust removal device. The treated dust removal liquid; the inlet of the hydrogen sulfide heating device is connected to the gas outlet of the hydrogen sulfide gas dust removal device to receive the water vapor, inert gas, and hydrogen sulfide mixture after treatment by the hydrogen sulfide gas dust removal device; the first outlet of the hydrogen sulfide heating device is connected to the inlet of the reaction device to transport part of the hydrogen sulfide gas and inert gas to the reaction device; the inlet of the hydrogen sulfide waste gas treatment device is connected to the second outlet of the hydrogen sulfide heating device to receive part of the hydrogen sulfide gas and inert gas after treatment by the hydrogen sulfide heating device; the liquid outlet of the hydrogen sulfide waste gas treatment device is connected to the inlet of the dust removal liquid treatment device to transport the treated waste liquid to the dust removal liquid treatment device; the gas outlet of the hydrogen sulfide waste gas treatment device is used to discharge inert gas.
[0005] In one or more embodiments of this application, the powder raw material in the reaction device is lithium oxide or lithium hydroxide powder raw material, the pressure in the reaction chamber is -0.09~0.09MPa, the temperature is 100~400℃, and the reaction device is selected from one of rotary kiln reactor, fluidized bed reactor or multi-type composite reactor.
[0006] In one or more embodiments of this application, the pressure inside the hydrogen sulfide gas dust removal device is -0.09~0.09MPa and the temperature is 5~400℃.
[0007] In one or more embodiments of this application, the hydrogen sulfide gas dust removal device is selected from one of the following: a spray dust collector, a filter dust collector, or a multi-type composite dust collector.
[0008] In one or more embodiments of this application, the dust removal liquid treatment device contains sodium hydroxide solution and oxygen. The concentration of sodium hydroxide solution is 5-35%, the concentration of oxygen is 98-99.9%, the pressure inside the dust removal liquid treatment device is -0.09-0.09 MPa, and the temperature is 5-100°C. The outlet of the dust removal liquid treatment device is connected to a by-product containing device for discharging the treated by-products into the by-product containing device.
[0009] In one or more embodiments of this application, the dust removal liquid treatment device is selected from one of the following: a spray reactor, a stirred reactor, a gas-liquid mixing reactor, or a multi-type composite reactor.
[0010] In one or more embodiments of this application, the pressure inside the hydrogen sulfide heating device is -0.09~0.09MPa and the temperature is 5~400℃.
[0011] In one or more embodiments of this application, the hydrogen sulfide heating device is provided with one of the following: an electric heat tracing heater, an electromagnetic induction heater, a resistance wire heater, or a heat exchanger.
[0012] In one or more embodiments of this application, the hydrogen sulfide waste gas treatment device contains a sodium hydroxide solution, and the pressure inside the hydrogen sulfide waste gas treatment device is -10 kPa to atmospheric pressure, and the temperature is 10 to 60°C.
[0013] In one or more embodiments of this application, the hydrogen sulfide waste gas treatment device is selected from one or more of the following: a spray tower, a flare device, or a combination of multiple types of waste gas treatment devices.
[0014] Based on the above technical solution, the lithium sulfide preparation apparatus of this application has at least the following beneficial technical effects: The lithium sulfide preparation apparatus of this application enables continuous lithium sulfide production. The lithium sulfide preparation reaction is carried out in a reaction device, and the lithium sulfide product is discharged to a product containing device. The water vapor, excess hydrogen sulfide gas, inert gas, and lithium sulfide dust generated during the reaction are fed into a hydrogen sulfide gas dust removal device for treatment. The water vapor, inert gas, and hydrogen sulfide mixture generated after treatment by the hydrogen sulfide gas dust removal device are fed into a hydrogen sulfide heating device for further treatment. The dust removal liquid from the hydrogen sulfide gas dust removal device is fed into a dust removal liquid treatment device. A portion of the hydrogen sulfide gas heated by the hydrogen sulfide heating device is then fed back into the reaction device for further reaction. This recycling of hydrogen sulfide gas improves its utilization rate and reduces production costs. The remaining hydrogen sulfide gas enters the hydrogen sulfide waste gas treatment device for processing. The waste liquid obtained after treatment by the hydrogen sulfide waste gas treatment device enters the dust removal liquid treatment device. The dust removal liquid treatment device treats the dust removal liquid and waste liquid and then discharges the by-products. The inert gas after treatment by the hydrogen sulfide waste gas treatment device is discharged into the atmosphere, thus meeting the design requirements of the chemical production device. The configuration of automated equipment enables the entire preparation device to operate automatically, meeting the requirements of small footprint, few operators, and high production efficiency.
[0015] On the other hand, the hydrogen sulfide waste gas treatment device in the preparation apparatus of this utility model has good sealing performance in all parts, which meets the environmental protection and safety requirements of chemical production equipment and eliminates hydrogen sulfide poisoning safety accidents. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a block diagram of the lithium sulfide preparation apparatus provided in the embodiments of this application.
[0018] Figure 2 This is an example of the appearance of lithium sulfide prepared by the preparation apparatus of this application.
[0019] Figure 3 This is an image of the appearance of a lithium sulfide product solution prepared by the preparation apparatus of this application.
[0020] Figure 4 This is the standard X-ray diffraction (XRD) pattern of lithium sulfide.
[0021] Figure 5 This is an X-ray diffraction (XRD) pattern of a lithium sulfide product prepared by the preparation apparatus of this application in one embodiment.
[0022] Figure 6 This is an XPS image of a lithium sulfide product prepared by the preparation apparatus of this application in one embodiment.
[0023] Figure 7 This is a particle size analysis diagram of the lithium sulfide product produced by the preparation apparatus of this application.
[0024] In the diagram: 1-Reaction apparatus; 2-Hydrogen sulfide gas dust removal device; 3-Dust removal liquid treatment device; 4-Hydrogen sulfide heating device; 5-Hydrogen sulfide waste gas treatment device; 6-By-product containment device; 7-Product containment device. Detailed Implementation
[0025] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0029] The technical solution of this application will now be described in detail with reference to the accompanying drawings.
[0030] Please refer to Figure 1 This application provides an apparatus for preparing lithium sulfide, comprising: a reaction device 1, a hydrogen sulfide gas dust removal device 2, a dust removal liquid treatment device 3, a hydrogen sulfide heating device 4, and a hydrogen sulfide waste gas treatment device 5. The reaction device 1 has a reaction chamber containing lithium oxide or lithium hydroxide powder raw materials, hydrogen sulfide gas raw materials, and an inert gas, for carrying out the lithium sulfide preparation reaction within the reaction chamber. The product outlet of the reaction device 1 is connected to a product containing device 7 for conveying the reacted lithium sulfide product to the product containing device 7; that is, the lithium sulfide product after the reaction in the reaction device 1 is completed is conveyed through the product outlet of the reaction device 1 to the product containing device 7 for storage and packaging as a product. The pressure inside the reaction chamber of the reaction device 1 is -0.09~0.09MPa, and the temperature is 100~400℃, where the raw materials react at high temperature to generate lithium sulfide product and water vapor.
[0031] In some embodiments, the reaction apparatus 1 may be one of a rotary kiln reactor, a fluidized bed reactor, or a multi-type composite reactor.
[0032] Please refer to Figure 1The inlet of the hydrogen sulfide gas dust removal device 2 is connected to the gas outlet of the reaction device 1, and it is used to receive water vapor, excess hydrogen sulfide gas, inert gas, and lithium sulfide dust from the reaction device 1. Since an inert gas, such as argon, is introduced into the reaction device 1 for protection and to regulate the concentration of hydrogen sulfide gas, and water vapor is generated during the lithium sulfide reaction, the reaction device 1 will contain water vapor, inert gas, unreacted excess hydrogen sulfide gas, and generated lithium sulfide dust after the reaction. This water vapor, excess hydrogen sulfide gas, lithium sulfide dust, and inert gas enter the hydrogen sulfide gas dust removal device 2 through the gas outlet of the reaction device 1 for dust removal, allowing the reaction in the reaction device 1 to proceed continuously. The pressure inside the hydrogen sulfide gas dust removal device 2 is -0.09~0.09 MPa, and the temperature is 5~400℃. In some embodiments, the hydrogen sulfide gas dust removal device 2 is selected from a spray dust collector, a filter dust collector, or a multi-type composite dust collector.
[0033] Please refer to Figure 1 The inlet of the dust removal liquid treatment device 3 is connected to the liquid outlet of the hydrogen sulfide gas dust removal device 2, and is used to receive the dust removal liquid after treatment by the hydrogen sulfide gas dust removal device 2. Since the hydrogen sulfide gas dust removal device 2 produces dust removal liquid as well as a mixed gas of water vapor, inert gas and low dust content of hydrogen sulfide after dust removal, the generated dust removal liquid is transported to the dust removal liquid treatment device 3 through the liquid outlet for further processing, while the generated mixed gas of water vapor, inert gas and low dust content of hydrogen sulfide enters the hydrogen sulfide heating device 4 for heating treatment.
[0034] Please refer to Figure 1 The inlet of the hydrogen sulfide heating device 4 is connected to the gas outlet of the hydrogen sulfide gas dust removal device 2, and is used to receive the water vapor, inert gas, and hydrogen sulfide mixture after treatment by the hydrogen sulfide gas dust removal device 2. The treated hydrogen sulfide gas has a high purity. The first outlet of the hydrogen sulfide heating device 4 is connected to the inlet of the reaction device 1, and is used to transport part of the hydrogen sulfide gas and inert gas to the reaction device 1. This allows the hydrogen sulfide gas to be recycled, improving the utilization rate of hydrogen sulfide gas and reducing production costs. Excess hydrogen sulfide gas and inert gas in the hydrogen sulfide heating device 4 can be transported to the hydrogen sulfide waste gas treatment device 5 for waste gas treatment. The pressure inside the hydrogen sulfide heating device 4 is -0.09~0.09MPa, and the temperature is 5~400℃. In some embodiments, the hydrogen sulfide heating device 4 is equipped with one of the following: an electric heat tracing heater, an electromagnetic induction heater, a resistance wire heater, or a heat exchanger, to heat the hydrogen sulfide mixture to obtain high-purity hydrogen sulfide.
[0035] Please refer to Figure 1The inlet of the hydrogen sulfide waste gas treatment device 5 is connected to the second outlet of the hydrogen sulfide heating device 4, and is used to receive part of the hydrogen sulfide gas and inert gas after treatment by the hydrogen sulfide heating device 4. The hydrogen sulfide waste gas treatment device 5 contains an auxiliary liquid, namely sodium hydroxide solution. The sodium hydroxide solution reacts with the hydrogen sulfide gas to neutralize the acid and base, absorbing excess hydrogen sulfide gas to produce waste liquid. The unabsorbed inert gas can be discharged into the atmosphere after passing environmental emission standards. The gas outlet of the hydrogen sulfide waste gas treatment device 5 is used to discharge the inert gas. The pressure inside the hydrogen sulfide waste gas treatment device 5 is -10 kPa to atmospheric pressure, and the temperature is 10 to 60°C. In some embodiments, the hydrogen sulfide waste gas treatment device 5 is selected from one or more of the following: a spray tower, a flare device, or a combination of various types of waste gas treatment devices. The hydrogen sulfide waste gas treatment device has good sealing performance throughout, meeting the environmental protection and safety requirements of chemical production equipment, and preventing hydrogen sulfide poisoning accidents.
[0036] Please refer to Figure 1 The liquid outlet of the hydrogen sulfide waste gas treatment device 5 is connected to the inlet of the dust removal liquid treatment device 3, which is used to transport the treated waste liquid to the dust removal liquid treatment device 3. Thus, the dust removal liquid treatment device 3 contains the dust removal liquid from the hydrogen sulfide gas dust removal device 2 and the waste liquid from the hydrogen sulfide waste gas treatment device 5. The dust removal liquid treatment device 3 contains auxiliary liquid, namely sodium hydroxide solution and auxiliary gas, oxygen. The concentration of sodium hydroxide solution is 5~35%, the concentration of oxygen is 98~99.9%, the pressure inside the dust removal liquid treatment device 3 is -0.09~0.09MPa, and the temperature is 5~100℃. The waste liquid and dust removal liquid are then treated to obtain a mixed liquid of sodium sulfate, lithium hydroxide, and sodium hydroxide as a byproduct. The outlet of the dust removal liquid treatment device 3 is connected to the byproduct receiving device 6, which is used to discharge the treated byproduct into the byproduct receiving device 6 for collection or reuse.
[0037] In some embodiments, the dust removal liquid treatment device 3 is selected from one of a spray reactor, a stirred reactor, a gas-liquid mixing reactor, or a multi-type composite reactor.
[0038] The lithium sulfide preparation apparatus of this application can realize continuous operation of lithium sulfide production, and at the same time, it can process and recycle the generated products, thereby improving production efficiency and reducing production costs.
[0039] On the other hand, this application also provides a method for preparing lithium sulfide, which is prepared by the aforementioned preparation apparatus and includes the following steps: (1) Use an inert gas to replace the gas in the reaction device 1. After evacuating, fill the reaction chamber of the reaction device 1 with hydrogen sulfide gas with a purity of 99.9% and let it circulate under no load to the reaction conditions. Add lithium oxide or lithium hydroxide powder raw material and hydrogen sulfide gas raw material into the reaction device 1, carry out the reaction in the reaction device 1, and discharge the lithium sulfide product after the reaction to the product container 7.
[0040] (2) The water vapor, excess hydrogen sulfide gas, inert gas and lithium sulfide dust after the reaction in the reaction device 1 are transported to the hydrogen sulfide gas dust removal device 2 through its gas outlet for dust removal treatment.
[0041] (3) The dust removal liquid after being processed by the hydrogen sulfide gas dust removal device 2 is discharged to the dust removal liquid treatment device 3, and the water vapor, inert gas and hydrogen sulfide mixed gas after being processed by the hydrogen sulfide gas dust removal device 2 are transported to the hydrogen sulfide heating device 4.
[0042] (4) Part of the hydrogen sulfide gas after being treated by the hydrogen sulfide heating device 4 is introduced into the reaction device 1, and part of the hydrogen sulfide gas is introduced into the hydrogen sulfide waste gas treatment device 5.
[0043] (5) Add sodium hydroxide solution to hydrogen sulfide waste gas treatment device 5 to treat hydrogen sulfide gas, and discharge the treated waste liquid to dust removal liquid treatment device 3. At the same time, discharge the treated inert gas through the gas outlet of hydrogen sulfide waste gas treatment device 5.
[0044] (6) Add sodium hydroxide solution to the dust removal liquid treatment device 3 and introduce oxygen to treat the dust removal liquid and waste liquid, and discharge the treated by-products to the by-product containment device 6.
[0045] like Figure 2 and Figure 3 As shown, Figure 2 The diagram shows the appearance of lithium sulfide product prepared according to an embodiment of the preparation apparatus of this application. Figure 3 The diagram shows the appearance of a lithium sulfide product solution prepared according to an embodiment of the preparation apparatus of this application. Figure 2 and Figure 3 As can be seen, lithium sulfide products are white in appearance, and a 100 mg / ml aqueous solution of lithium sulfide is clear.
[0046] The lithium sulfide produced using the preparation apparatus of this application is of superior quality to existing products on the market, with a purity of up to 99.99%, and its chemical composition is shown in Table 1 below.
[0047] Table 1 Chemical composition of lithium sulfide
[0048] Figure 7The particle size distribution diagram of the lithium sulfide product produced by the preparation apparatus of this application is shown. Testing revealed that the particle size of the lithium sulfide product produced using the preparation apparatus of this application reaches D90 < 5 μm. Here, D90 represents the particle size corresponding to a cumulative particle size distribution percentage of 90% in the sample.
[0049] Figure 4 The standard X-ray diffraction (XRD) pattern for lithium sulfide is shown below. Figure 5 The X-ray diffraction (XRD) pattern of a lithium sulfide product prepared using the preparation apparatus of this application shows that the polyimide tape of the lithium sulfide product exhibits excellent water-resistant test results, consistent with the standard pattern.
[0050] Figure 6 XPS plot of lithium sulfide product prepared by the preparation apparatus of this application is shown. The test results show that all sulfur ions in the product are in the -2 valence state and the product does not contain polysulfides. However, XPS test results of lithium sulfide products produced by other process equipment on the market show that the products contain polysulfides and the purity of lithium sulfide is not high.
[0051] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An apparatus for preparing lithium sulfide, characterized in that, include: The reaction device (1) has a reaction chamber inside, which contains powder raw materials, hydrogen sulfide gas raw materials and inert gas. The product outlet of the reaction device (1) is connected to the product containing device (7) for conveying the lithium sulfide product after the reaction to the product containing device (7). Hydrogen sulfide gas dust removal device (2), the inlet of which is connected to the gas outlet of the reaction device (1), is used to receive water vapor, excess hydrogen sulfide gas, inert gas and lithium sulfide dust from the reaction device (1) after the reaction. Dust removal liquid treatment device (3), the inlet of the dust removal liquid treatment device (3) is connected to the liquid outlet of the hydrogen sulfide gas dust removal device (2), and is used to receive the dust removal liquid after being treated by the hydrogen sulfide gas dust removal device (2); A hydrogen sulfide heating device (4) is provided, the inlet of which is connected to the gas outlet of the hydrogen sulfide gas dust removal device (2) for receiving water vapor, inert gas and hydrogen sulfide mixed gas after being processed by the hydrogen sulfide gas dust removal device (2). The first outlet of the hydrogen sulfide heating device (4) is connected to the inlet of the reaction device (1) for conveying part of the hydrogen sulfide gas and inert gas to the reaction device (1). The hydrogen sulfide waste gas treatment device (5) has its inlet connected to the second outlet of the hydrogen sulfide heating device (4) for receiving part of the hydrogen sulfide gas and inert gas after treatment by the hydrogen sulfide heating device (4). The liquid outlet of the hydrogen sulfide waste gas treatment device (5) is connected to the inlet of the dust removal liquid treatment device (3) for transporting the treated waste liquid to the dust removal liquid treatment device (3). The gas outlet of the hydrogen sulfide waste gas treatment device (5) is used to discharge inert gas.
2. The preparation apparatus according to claim 1, characterized in that, The powder raw material in the reaction device (1) is lithium oxide or lithium hydroxide powder raw material. The pressure in the reaction chamber is -0.09~0.09MPa and the temperature is 100~400℃. The reaction device (1) is selected from one of the rotary kiln reactor, fluidized bed reactor or multi-type composite reactor.
3. The preparation apparatus according to claim 1, characterized in that, The pressure inside the hydrogen sulfide gas dust removal device (2) is -0.09~0.09MPa, and the temperature is 5~400℃.
4. The preparation apparatus according to claim 3, characterized in that, The hydrogen sulfide gas dust removal device (2) is selected from one of the following: spray dust collector, filter dust collector or multi-type composite dust collector.
5. The preparation apparatus according to claim 1, characterized in that, The dust removal liquid treatment device (3) contains sodium hydroxide solution and oxygen. The concentration of the sodium hydroxide solution is 5-35%, and the concentration of the oxygen is 98-99.9%. The pressure inside the dust removal liquid treatment device (3) is -0.09-0.09 MPa, and the temperature is 5-100℃. The outlet of the dust removal liquid treatment device (3) is connected to the by-product container (6) for discharging the treated by-product into the by-product container (6).
6. The preparation apparatus according to claim 5, characterized in that, The dust removal liquid treatment device (3) is selected from one of the following: spray reactor, stirred reactor, gas-liquid mixing reactor or multi-type composite reactor.
7. The preparation apparatus according to claim 1, characterized in that, The pressure inside the hydrogen sulfide heating device (4) is -0.09~0.09MPa, and the temperature is 5~400℃.
8. The preparation apparatus according to claim 7, characterized in that, The hydrogen sulfide heating device (4) is equipped with one of the following: an electric heat tracing heater, an electromagnetic induction heater, a resistance wire heater, or a heat exchanger.
9. The preparation apparatus according to claim 1, characterized in that, The hydrogen sulfide waste gas treatment device (5) contains a sodium hydroxide solution. The pressure inside the hydrogen sulfide waste gas treatment device (5) is -10kPa to atmospheric pressure, and the temperature is 10 to 60℃.
10. The preparation apparatus according to claim 9, characterized in that, The hydrogen sulfide waste gas treatment device (5) is selected from one or more of the following: spray tower, flare device or composite waste gas treatment device.