Hydrogen sulfide indirect generating device

Abstract

The utility model discloses a hydrogen sulfide indirect generating device which comprises a reaction kettle, an evaporation kettle and a safety absorption tank, an inner cavity of the safety absorption tank is filled with alkaline solution, the safety absorption tank is connected with the reaction kettle through a gas guide pipe, the gas outlet end of the gas guide pipe extends into the alkaline solution, and the gas outlet end of the gas guide pipe is connected with the evaporation kettle. A pneumatic adjusting valve is arranged on the gas guide pipe, and a sulfuric acid liquid inlet pipeline with a first electromagnetic valve, a vulcanizing agent liquid inlet pipe with a second electromagnetic valve, a gas outlet pipe with a third electromagnetic valve and stirring blades driven by a stirring motor are arranged on the reaction kettle; and the reaction kettle is connected with the evaporation kettle through a liquid discharge pipe with a fourth electromagnetic valve. Dilute sulfuric acid and vulcanizing agent slurry react to produce hydrogen sulfide gas, the hydrogen sulfide gas is fed into a rear-end valuable metal recovery section to be used for valuable metal precipitation and recovery, hydrogen sulfide and pickling solution react to produce metal precipitation, the copper removal effect is good, and other impurity ions cannot be introduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valuable metal recovery, in particular to a hydrogen sulfide indirect generating device. Background Art

[0002] During the pickling process of copper and copper alloy strips, a large amount of pickling liquid containing valuable metals copper and zinc will be produced. In order to improve the economic benefits of enterprises and reduce the pollution of waste acid discharge to the environment, it is of great significance to recover the valuable metals in the liquid after copper strip washing. Among them, the common methods for recovering Cu are zinc powder replacement method, electrolytic method and sulfidation method.

[0003] The existing sulfidation method generally uses the direct addition of sodium sulfide or sodium hydrogen sulfide solids into the pickling solution to precipitate copper. This method has a large processing capacity, high removal efficiency, and low energy consumption, but it will introduce a large amount of Na into the system. + , which is not conducive to the subsequent recycling of wastewater. Therefore, it is of great significance to provide an indirect hydrogen sulfide generator to solve this problem. Therefore, the present application provides an indirect hydrogen sulfide generator to meet the demand. Utility Model Content

[0004] The purpose of the present application is to provide a hydrogen sulfide indirect generation device for solving the technical problems raised in the above-mentioned background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a hydrogen sulfide indirect generation device, comprising a reactor, an evaporator and a safety absorption tank, the inner cavity of the safety absorption tank is filled with an alkaline solution, the safety absorption tank is connected to the reactor through an air duct, and the air outlet end of the air duct extends into the alkaline solution, a pneumatic regulating valve is arranged on the air duct, the reactor is provided with a sulfuric acid inlet pipe with a first solenoid valve, a sulfiding agent inlet pipe with a second solenoid valve, an air outlet pipe with a third solenoid valve and a stirring blade driven by a stirring motor, the reactor is connected to the evaporator through a discharge pipe with a fourth solenoid valve, a heater is arranged in the evaporator, and an exhaust pipe is arranged at the upper end of the evaporator.

[0006] As a preferred implementation manner in this embodiment, the air duct includes a U-shaped tube for connecting the reactor and the safety absorption tank, a hollow tube extending into the alkali solution is installed on the U-shaped tube through a rotating joint, a stirring rod is arranged on the outer wall of the hollow tube, and a plurality of installation air pipes are arranged in a circle at the lower end of the hollow tube, and the plurality of installation air pipes are all communicated with the inner cavity of the hollow tube, and the plurality of installation air pipes are located on the same side and are arranged in a straight line with a plurality of exhaust pipes with one-way exhaust valves.

[0007] As a preferred implementation manner in this embodiment, the inner cavity of the safety absorption tank is provided with an air collecting hood, and the air collecting hood is penetrated by the hollow tube. A sealing ring is provided at the connection between the hollow tube and the air collecting hood. The air outlet of the air collecting hood is connected to the air inlet of the circulation pipe. The air outlet of the circulation pipe extends into the alkaline solution of the bottom layer and is connected to the microporous aeration head. A pump body is provided on the circulation pipe.

[0008] As a preferred implementation manner in this embodiment, the stirring rod is configured as a triangular structure, and the tip of the stirring rod is consistent with the rotation direction of the stirring rod.

[0009] In summary, the technical effects and advantages of the utility model are:

[0010] The utility model has a reasonable structure, produces hydrogen sulfide gas by reacting dilute sulfuric acid and sulfiding agent slurry, and sends it to the rear valuable metal recovery section for valuable metal precipitation recovery, utilizes hydrogen sulfide and pickling liquid to react to produce metal precipitation, has good copper removal effect, and does not introduce other impurity ions;

[0011] In the utility model, a safety absorption tank is provided. When the reaction produces excessive hydrogen sulfide, the pneumatic regulating valve is opened by the internal air pressure, and part of the high-pressure hydrogen sulfide gas automatically enters the alkaline solution of the safety absorption tank through the air guide pipe and is absorbed by the reaction.

[0012] In the utility model, a gas collecting hood and a circulation pipe are provided, and the hydrogen sulfide gas 1 overflowing above the alkaline liquid surface can be pumped into the alkaline solution again through the pump body, so as to achieve complete elimination of the hydrogen sulfide gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the cross-section structure of the medium safety tank;

[0016] Figure 3 for Figure 2 Schematic diagram of the stirring rod structure.

[0017] In the figure: 1. Safety absorption tank; 2. Air guide pipe; 21. U-shaped pipe; 22. Rotary joint; 23. Hollow pipe; 24. Stirring rod; 25. Exhaust pipe; 26. Install air pipe; 27. Gas collecting hood; 28. Circulation pipe; 3. Pneumatic regulating valve; 4. First solenoid valve; 5. Sulfuric acid inlet pipeline; 6. Reactor; 7. Stirring blades; 8. Pressure sensor; 9. Stirring motor; 10. Third solenoid valve; 11. Air outlet pipe; 12. Second solenoid valve; 13. Vulcanizing agent inlet pipe; 14. Exhaust pipe guide; 15. Liquid discharge pipe; 16. Heater; 17. Fourth solenoid valve; 18. Evaporator. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example: Reference Figure 1-2 The indirect generation device of hydrogen sulfide shown in the figure comprises a reactor 6, an evaporator 18 and a safety absorber 1, the inner cavity of the safety absorber 1 is filled with an alkaline solution, the safety absorber 1 and the reactor 6 are connected by an air duct 2, and the air outlet end of the air duct 2 extends into the alkaline solution, a pneumatic regulating valve 3 is arranged on the air duct 2, a sulfuric acid inlet pipe 5 with a first solenoid valve 4, a sulfiding agent inlet pipe 13 with a second solenoid valve 12, an air outlet pipe 11 with a third solenoid valve 10 and a stirring blade 7 driven by a stirring motor 9 are arranged on the reactor 6, the reactor 6 is connected to the evaporator 18 through a liquid discharge pipe 15 with a fourth solenoid valve 17, a heater 16 is arranged in the evaporator 18, and an exhaust pipe 14 is arranged at the upper end of the evaporator 18.

[0020] The device consists of a safety absorption tank 1, a reactor 6 and an evaporator 18. Dilute sulfuric acid and sulfiding agent slurry are added to the reactor through the sulfuric acid inlet pipe 5 and the sulfiding agent inlet pipe 13, and the stirring motor 9 is started. The generated hydrogen sulfide gas is sent to the rear-end valuable metal recovery section through the outlet pipe 11 (which is connected to the aeration system in the reactor filled with pickling liquid) for valuable metal precipitation recovery. The metal precipitation is produced by the reaction of hydrogen sulfide and pickling liquid, with good copper removal effect and no introduction of other impurity ions. The liquid after the reaction enters the evaporator 18 through the discharge pipe 15, and is heated and evaporated by the heating resistance wire 19 to prepare the corresponding sulfates of various sulfides. The generated steam can be used to heat other Solution, reduce energy consumption, when using hydrogen sulfide gas to react with pickling solution to generate metal precipitation, it is necessary to control hydrogen sulfide within a certain flow rate range (avoid too fast flow rate, which may easily lead to insufficient reaction, incomplete precipitation or too fine precipitation particles generated, which are difficult to settle and separate). In order to prevent the reaction in the reactor 6 from producing excessive hydrogen sulfide gas, resulting in an increase in the internal air pressure of the reactor 6 and causing the flow rate of hydrogen sulfide gas introduced into the pickling solution to be too fast, a safety absorption tank 1 is provided. When the reaction produces excessive hydrogen sulfide, the pneumatic regulating valve 3 is opened by the internal air pressure, and part of the high-pressure hydrogen sulfide gas enters the alkaline solution of the safety absorption tank 1 through the air duct 2 and is absorbed by the reaction.

[0021] It should be noted that, first, a pressure sensor 8 can be set in the reactor 6 to detect the internal air pressure, and the pressure sensor 8, the stirring motor 9, the first solenoid valve 4, the second solenoid valve 12, the third solenoid valve 10 and the fourth solenoid valve 17 are all electrically connected to the PLC controller; second, the sulfiding agent used in the reactor can be one of the sulfides such as sodium sulfide, sodium hydrosulfide, potassium sulfide, potassium hydrosulfide, zinc sulfide, etc.

[0022] As a preferred implementation in this embodiment, Figure 2 As shown, the air duct 2 includes a U-shaped tube 21 for connecting the reactor 6 and the safety absorption tank 1, a hollow tube 23 extending into the alkali solution is installed on the U-shaped tube 21 through a rotating joint 22, a stirring rod 24 is arranged on the outer wall of the hollow tube 23, and a plurality of installation air pipes 26 are arranged in a circle at the lower end of the hollow tube 23, and the plurality of installation air pipes 26 are all communicated with the inner cavity of the hollow tube 23, and the plurality of installation air pipes 26 are located on the same side and are all arranged in a straight line with a plurality of exhaust pipes 25 with one-way exhaust valves.

[0023] After the high-pressure hydrogen sulfide gas flows into the air guide pipe 2 and is discharged from the exhaust pipe 25, it drives the hollow tube 23 to rotate, causing the stirring rod 24 to rotate for mixing, thereby improving the treatment effect of the hydrogen sulfide gas.

[0024] As a preferred implementation in this embodiment, Figure 2As shown, the inner cavity of the safety absorption tank 1 is provided with a gas collecting hood 27, and the gas collecting hood 27 is penetrated by the hollow tube 23. A sealing ring is provided at the connection between the hollow tube 23 and the gas collecting hood 27. The gas outlet of the gas collecting hood 27 is connected to the gas inlet of the circulation pipe 28. The gas outlet of the circulation pipe 28 extends into the alkaline solution of the bottom layer and is connected to the microporous aeration head. A pump body is provided on the circulation pipe 28.

[0025] Since part of the hydrogen sulfide gas will overflow to the top of the alkaline liquid when treating the hydrogen sulfide gas, in order to ensure the treatment effect of the hydrogen sulfide gas, a circulation pipe with a pump body is set up, and the hydrogen sulfide gas 1 overflowing to the top of the alkaline liquid surface can be pumped into the alkaline solution again through the pump body to achieve complete elimination of the hydrogen sulfide gas.

[0026] It should be noted that a pressure detection sensor electrically connected to the PLC controller can be provided in the safety absorption tube 1 to detect the air pressure above the alkaline liquid surface. When the air pressure above the alkaline liquid surface increases, the pump body can be controlled by the controller to pump the hydrogen sulfide gas into the alkaline solution. When the air pressure above the alkaline liquid surface returns to normal, the pump body is controlled and stopped.

[0027] As a preferred implementation in this embodiment, Figure 3 As shown, the stirring rod 24 is configured as a triangular structure, and the tip 19 of the stirring rod 24 is consistent with the rotation direction of the stirring rod 24 .

[0028] The tip 19 of the stirring rod 24 is consistent with the rotation direction of the stirring rod 24, so that the triangular structure of the stirring rod 24 has less resistance when rotating, and large bubbles can be sheared into smaller bubbles through the tip 19. This shearing effect helps to increase the contact area between the bubbles and the liquid, improve the solubility of the gas in the liquid, and promote the mixing and reaction of the gas and the liquid. At the same time, the triangular structure of the stirring rod 24 can form stronger convection and vortex in the reactor 6 during stirring, which helps to mix and disperse the reactants more evenly, promote sufficient contact between the reactants, and improve the reaction rate and efficiency.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A hydrogen sulfide indirect generating device, characterized in that: The invention comprises a reactor (6), an evaporator (18) and a safety absorption tank (1), wherein the inner cavity of the safety absorption tank (1) is filled with an alkaline solution, the safety absorption tank (1) and the reactor (6) are connected via an air guide pipe (2), and the air outlet end of the air guide pipe (2) extends into the alkaline solution, the air guide pipe (2) is provided with a pneumatic regulating valve (3), the reactor (6) is provided with a sulfuric acid inlet pipe (5) with a first electromagnetic valve (4), a sulfiding agent inlet pipe (13) with a second electromagnetic valve (12), an air outlet pipe (11) with a third electromagnetic valve (10), and a stirring blade (7) driven by a stirring motor (9), the reactor (6) is connected to the evaporator (18) via a liquid discharge pipe (15) with a fourth electromagnetic valve (17), a heater (16) is provided in the evaporator (18), and an exhaust pipe (14) is provided at the upper end of the evaporator (18).

2. A hydrogen sulfide indirect generating device according to claim 1, characterized in that: The air guide pipe (2) comprises a U-shaped pipe (21) for connecting the reactor (6) and the safety absorption tank (1); a hollow pipe (23) extending into the alkali solution is mounted on the U-shaped pipe (21) via a rotary joint (22); a stirring rod (24) is arranged on the outer wall of the hollow pipe (23); a plurality of installation air pipes (26) are arranged in a circular shape at the lower end of the hollow pipe (23); the plurality of installation air pipes (26) are all in communication with the inner cavity of the hollow pipe (23); and a plurality of exhaust pipes (25) with one-way exhaust valves are arranged on the same side of the plurality of installation air pipes (26) in a straight line.

3. A hydrogen sulfide indirect generating device according to claim 2, characterized in that: The inner cavity of the safety absorption tank (1) is provided with a gas collecting hood (27), the gas collecting hood (27) is penetrated by the hollow tube (23), a sealing ring is provided at the connection between the hollow tube (23) and the gas collecting hood (27), the gas outlet of the gas collecting hood (27) is connected to the gas inlet of the circulation tube (28), the gas outlet of the circulation tube (28) extends into the alkaline solution of the bottom layer and is connected to the microporous aeration head, and a pump body is provided on the circulation tube (28).

4. A hydrogen sulfide indirect generating device according to claim 2, characterized in that: The stirring rod (24) is configured as a triangular structure, and the tip (19) of the stirring rod (24) is consistent with the rotation direction of the stirring rod (24).

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