System for continuously preparing hydrogen sulfide

Abstract

The utility model belongs to the technical field of sulfide preparation, and particularly relates to a system for continuously preparing hydrogen sulfide, which comprises a reaction kettle, a cyclone separator arranged at the top of the reaction kettle, a washing kettle connected with the cyclone separator, a stirring turntable arranged at the bottom of the washing kettle, an absorption kettle connected with the top of the washing kettle, and a desorption kettle connected with the bottom of the absorption kettle, a spiral stirring paddle is arranged in the desorption kettle, the top of the desorption kettle is sequentially connected with a condenser, an adsorption tower, a compressor and a rectifying tower, a plurality of adsorption layers are arranged in the adsorption tower, and a pressure pump is arranged at the upper part of the rectifying tower. The utility model provides a device which is modularized, continuous and high in automation degree. Efficient production of hydrogen sulfide is achieved, purification of hydrogen sulfide is completed on line, high-purity hydrogen sulfide is directly produced, and production and use are achieved.

Description

Technical Field

[0001] This invention belongs to the field of sulfide preparation technology, specifically relating to a system for the continuous preparation of hydrogen sulfide. Background Technology

[0002] Hydrogen sulfide is an important chemical raw material and specialty gas, widely used in industrial and high-tech fields such as standard gas preparation, metal refining, lithium battery material preparation, and semiconductor doping and etching. Different applications have significantly different purity requirements for hydrogen sulfide, with extremely stringent limits on specific impurities such as moisture, oxygen, carbon dioxide, and total hydrocarbons.

[0003] Traditional hydrogen sulfide production is small-scale and intermittent, resulting in problems such as crude reaction control, low gas purity, easy leakage of highly toxic gases, extremely high risks of manual operation, and inability to obtain products continuously. Large-scale industrial production of hydrogen sulfide relies on complex Claus units or natural gas purification processes, mainly for resource disposal, which requires huge investments and is not suitable for small and medium-sized needs.

[0004] Furthermore, these methods suffer from problems such as discontinuous reactions, low production efficiency, unstable gas purity, high impurity content, and poor production safety, making it difficult to meet the demands of large-scale, high-quality, continuous, and stable industrial production. Particularly for battery-grade and electronic-grade applications, existing methods produce gases with low purity, lengthy processes, low yields, and high costs. Utility Model Content

[0005] Based on the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a system for continuous preparation of hydrogen sulfide, so as to realize the industrial continuous production of hydrogen sulfide and improve the purity and preparation efficiency of hydrogen sulfide.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] The system for continuous hydrogen sulfide production according to this utility model includes a reaction vessel, a cyclone separator at the top of the reaction vessel, a washing vessel connected to the cyclone separator, a stirring disc at the bottom of the washing vessel, an absorption vessel at the top of the washing vessel, a desorption vessel at the bottom of the absorption vessel, a spiral stirring paddle inside the desorption vessel, and a condenser, an adsorption tower, a compressor, and a distillation tower connected sequentially at the top of the desorption vessel. The adsorption tower has several adsorption layers inside, and a pressure pump is installed at the top of the distillation tower.

[0008] The reactor is equipped with a solid feed inlet and a liquid feed inlet at the top.

[0009] The reactor is equipped with a stirrer, which includes a semi-circular stirring paddle at the bottom and a stirring rod in the middle, and a motor is connected to the top of the stirrer.

[0010] The washing tank is equipped with a liquid sprayer, a gas disperser, and a wire mesh demister. The gas disperser is located at the bottom of the washing tank and above the stirring disc. The liquid sprayer and the wire mesh demister are located at the top of the washing tank, with the wire mesh demister above the liquid sprayer and the liquid sprayer above the gas disperser.

[0011] The top of the stirring turntable is provided with several turbulence blocks, and the bottom of the stirring turntable is connected to a motor.

[0012] An absorbent sprayer is provided on the upper inner side of the absorption vessel, a valve is provided between the absorption vessel and the washing vessel, and the top of the washing vessel is connected to the bottom of the absorption vessel.

[0013] The desorption vessel is equipped with a heating jacket.

[0014] The adsorption tower has four adsorption layers inside.

[0015] The distillation column is equipped with a light exhaust pipe at the top and a product pipe at the bottom.

[0016] The compressor inlet is connected to the top of the adsorption tower, and the compressor outlet is connected to the upper part of the distillation tower.

[0017] The beneficial effects of this utility model are:

[0018] This invention provides a modular, continuous, and highly automated device. It achieves efficient production of hydrogen sulfide and completes online purification of hydrogen sulfide, directly producing high-purity hydrogen sulfide for immediate use.

[0019] This invention achieves continuous operation of the entire process from reaction to distillation through cyclone separation, washing, absorption, desorption, adsorption drying, and low-temperature distillation. This significantly improves production efficiency, ensures stable product quality, and facilitates automated control, making it suitable for large-scale industrial production. The combined structure of adsorption drying, compression liquefaction, and low-temperature distillation effectively removes moisture, acid mist, non-condensable gases, and organic impurities, yielding high-purity hydrogen sulfide to meet market demands. Continuous and stable reaction and gas delivery avoid the safety hazards of sudden pressure changes and gas backflow that can occur in intermittent operations. The closed system also reduces the risk of toxic gas leakage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the stirring turntable structure of this utility model;

[0022] In the diagram: 1. Reactor; 2. Washing vessel; 3. Absorption vessel; 4. Desorption vessel; 5. Condenser; 6. Adsorption tower; 7. Cyclone separator; 8. Stirring disc; 9. Spiral agitator; 10. Pressure pump; 11. Compressor; 12. Distillation column; 13. Agitator; 14. Liquid sprayer; 15. Gas disperser; 16. Wire mesh demister; 17. Absorbent liquid sprayer; 18. Solid feed inlet; 19. Liquid feed inlet; 201. Valve; 401. Heating jacket; 1201. Light discharge pipe; 1202. Product pipe. Detailed Implementation

[0023] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0024] Example 1

[0025] like Figure 1-2 As shown, the continuous hydrogen sulfide preparation system of this utility model includes a reaction vessel 1, a cyclone separator 7 at the top of the reaction vessel 1, a washing vessel 2 connected to the cyclone separator 7, a stirring disc 8 at the bottom of the washing vessel 2, an absorption vessel 3 connected to the top of the washing vessel 2, a desorption vessel 4 connected to the bottom of the absorption vessel 3, a spiral stirring paddle 9 inside the desorption vessel 4, and a condenser 5, an adsorption tower 6, a compressor 11, and a distillation tower 12 connected sequentially to the top of the desorption vessel 4. The adsorption tower 6 has several adsorption layers inside, and a pressure pump 10 is installed on the upper part of the distillation tower 12.

[0026] The top of the reactor 1 is provided with a solid feed inlet 18 and a liquid feed inlet 19.

[0027] The reactor 1 is equipped with a stirrer 13, which includes a semi-circular stirring paddle at the bottom and a stirring rod in the middle. A motor is connected to the top of the stirrer 13.

[0028] The washing tank 2 is equipped with a liquid sprayer 14, a gas disperser 15 and a wire mesh demister 16. The gas disperser 15 is located at the bottom of the washing tank 2 and above the stirring turntable 8. The liquid sprayer 14 and the wire mesh demister 16 are located at the top of the washing tank 2. The wire mesh demister 16 is located above the liquid sprayer 14 and the liquid sprayer 14 is located above the gas disperser 15.

[0029] The top of the stirring disc 8 is equipped with several turbulent flow blocks, and the bottom of the stirring disc 8 is connected to a motor.

[0030] An absorbent sprayer 17 is provided on the upper inner side of the absorption vessel 3. A valve 201 is provided between the absorption vessel 3 and the washing vessel 2. The top of the washing vessel 2 is connected to the bottom of the absorption vessel 3.

[0031] A heating jacket 401 is provided on the outside of the desorption vessel 4.

[0032] The adsorption tower 6 has 4 adsorption layers inside.

[0033] A light exhaust pipe 1201 is provided at the top of the distillation column 12, and a product pipe 1202 is provided at the bottom of the distillation column 12.

[0034] The inlet of compressor 11 is connected to the top of adsorption tower 6, and the outlet of compressor 11 is connected to the upper part of distillation tower 12.

[0035] Working principle and process:

[0036] During the reaction, solid sulfur-containing reactants are fed into reactor 1 through solid feed inlet 18, followed by liquid feed inlet 19. The motor is then turned on to start stirring with agitator 13. The reaction generates hydrogen sulfide gas, which is initially separated by cyclone separator 7 and then fed into washing vessel 2 to absorb some gaseous impurities. Valve 201 is then controlled to allow the hydrogen sulfide gas to enter absorption vessel 3 at a uniform rate, ensuring complete absorption by the absorbent liquid. Unabsorbed gases are discharged from the top of absorption vessel 3. The absorbent liquid is then fed into desorption vessel 4 for heating and stirring to release the gases. Relatively pure hydrogen sulfide gas is then cooled and some absorbent droplets carried within the gas are adsorbed. The adsorbed and dried hydrogen sulfide gas is then compressed by compressor 11 to obtain liquid hydrogen sulfide. The liquid hydrogen sulfide is then transported to distillation column 12, where low-temperature nitrogen gas is supplied by pressure pump 10 to perform low-temperature distillation of the liquid hydrogen sulfide, resulting in pure liquid hydrogen sulfide. The low-temperature nitrogen gas can both control the internal temperature of distillation column 12 to maintain a low level and increase the internal pressure of the distillation column, ensuring the removal of low-boiling impurities and preventing hydrogen sulfide vaporization, thus obtaining high-purity hydrogen sulfide.

Claims

1. A system for continuous preparation of hydrogen sulfide, comprising a reaction vessel (1), characterized in that, A cyclone separator (7) is installed at the top of the reactor (1). The cyclone separator (7) is connected to a washing vessel (2). A stirring disc (8) is installed at the bottom of the washing vessel (2). An absorption vessel (3) is connected at the top of the washing vessel (2). A desorption vessel (4) is connected at the bottom of the absorption vessel (3). A spiral stirring paddle (9) is installed inside the desorption vessel (4). A condenser (5), an adsorption tower (6), a compressor (11), and a distillation tower (12) are connected in sequence at the top of the desorption vessel (4). Several adsorption layers are installed inside the adsorption tower (6). A pressure pump (10) is installed at the top of the distillation tower (12).

2. The system for continuous preparation of hydrogen sulfide according to claim 1, characterized in that, The reactor (1) is equipped with a solid feed inlet (18) and a liquid feed inlet (19) at the top.

3. The system for continuous preparation of hydrogen sulfide according to claim 1, characterized in that, The reactor (1) is equipped with a stirrer (13), which includes a semi-circular stirring paddle at the bottom and a stirring rod in the middle. A motor is connected to the top of the stirrer (13).

4. The system for continuous preparation of hydrogen sulfide according to claim 1, characterized in that, The washing tank (2) is equipped with a liquid sprayer (14), a gas disperser (15) and a wire mesh demister (16). The gas disperser (15) is located at the bottom of the washing tank (2) and above the stirring turntable (8). The liquid sprayer (14) and the wire mesh demister (16) are located at the top of the washing tank (2). The wire mesh demister (16) is located above the liquid sprayer (14), and the liquid sprayer (14) is located above the gas disperser (15).

5. The system for continuous preparation of hydrogen sulfide according to claim 1, characterized in that, The top of the stirring turntable (8) is equipped with several turbulent flow blocks, and the bottom of the stirring turntable (8) is connected to a motor.

6. The system for continuous preparation of hydrogen sulfide according to claim 1, characterized in that, An absorbent sprayer (17) is provided on the upper inner side of the absorption vessel (3). A valve (201) is provided between the absorption vessel (3) and the washing vessel (2). The top of the washing vessel (2) is connected to the bottom of the absorption vessel (3).

7. The system for continuous preparation of hydrogen sulfide according to claim 1, characterized in that, The desorption vessel (4) is equipped with a heating jacket (401).

8. The system for continuous preparation of hydrogen sulfide according to claim 1, characterized in that, The adsorption tower (6) has 4 adsorption layers inside.

9. The system for continuous preparation of hydrogen sulfide according to claim 1, characterized in that, A light exhaust pipe (1201) is provided at the top of the distillation column (12), and a product pipe (1202) is provided at the bottom of the distillation column (12).

10. The system for continuous preparation of hydrogen sulfide according to claim 1, characterized in that, The compressor (11) inlet is connected to the top of the adsorption tower (6), and the compressor (11) outlet is connected to the upper part of the distillation tower (12).

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