Unpowered stirring reaction system for preparing acid from sulfur

Abstract

The utility model provides an unpowered stirring reaction system for preparing acid from sulfur, which belongs to the technical field of preparing acid from sulfur and comprises a reaction tank, a liquid inlet pipeline and a liquid outlet pipeline, a heating tank is arranged in the middle of an inner cavity of the reaction tank, a spiral channel is spirally arranged in the inner cavity of the reaction tank from top to bottom, and the spiral channel surrounds the periphery of the heating tank. An exhaust pipe is arranged at the top of the reaction tank, a liquid inlet is tangentially formed in the upper portion of the side wall of the reaction tank, a liquid outlet is tangentially formed in the lower portion of the side wall of the reaction tank, the liquid inlet is located at an upper port of the spiral channel, the liquid outlet is located at a lower port of the spiral channel, the liquid inlet pipeline is connected to the liquid inlet, and the liquid outlet pipeline is connected to the liquid outlet. The liquid inlet pipeline and the liquid outlet pipeline are connected end to end through the booster pump. According to the unpowered stirring reaction system for preparing acid from sulfur provided by the utility model, a corresponding stirring mechanism is not arranged in the reaction tank, so that the service life of the reaction tank is ensured, the production efficiency is ensured, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of sulfuric acid production from sulfur, and more specifically, it relates to a power-free stirring reaction system for sulfuric acid production from sulfur. Background Art

[0002] The sulfuric acid production process from sulfur is a process for producing sulfuric acid. It uses sulfur as a raw material and converts it into sulfuric acid through chemical reactions.

[0003] After the sulfuric acid solution is prepared, it needs to be dried and concentrated acid treated to obtain the sulfuric acid product with the required concentration. When drying the sulfuric acid solution, it is necessary to heat and stir the sulfuric acid solution. The stirring mechanism in direct contact with sulfuric acid usually has a short service life and needs to be frequently replaced, which not only affects the production efficiency but also increases the cost. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a power-free stirring reaction system for sulfuric acid production from sulfur, aiming to solve the problem that the stirring mechanism in direct contact with sulfuric acid usually has a short service life and needs to be frequently replaced, which not only affects the production efficiency but also increases the cost.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a power-free stirring reaction system for sulfuric acid production from sulfur, including a reaction tank, a liquid inlet pipe and a liquid outlet pipe. A heating tank is arranged in the middle of the inner cavity of the reaction tank. A spiral channel is arranged in the inner cavity of the reaction tank in a spiral shape from top to bottom. The spiral channel surrounds the outer periphery of the heating tank. An exhaust pipe is arranged at the top of the reaction tank. A liquid inlet is tangentially arranged on the upper part of the side wall of the reaction tank. A liquid outlet is tangentially arranged on the lower part of the side wall of the reaction tank. The liquid inlet is located at the upper port of the spiral channel. The liquid outlet is located at the lower port of the spiral channel. The liquid inlet pipe is connected to the liquid inlet, and the liquid outlet pipe is connected to the liquid outlet. The liquid inlet pipe and the liquid outlet pipe are connected end to end through a booster pump.

[0006] In a possible implementation manner, the inner cavity of the heating tank is filled with heat-conducting oil, and a heating resistor for heating the heat-conducting oil is arranged in the inner cavity of the heating tank.

[0007] In a possible implementation manner, the spiral channel is fixedly welded to the inner peripheral wall of the reaction tank, and an air vent gap is arranged between the spiral channel and the heating tank.

[0008] In a possible implementation manner, a receiving cavity is arranged at the bottom of the inner cavity of the reaction tank, and the receiving cavity communicates with the air vent gap.

[0009] In a possible implementation, a reflux pipeline communicating with the accommodation chamber is provided at the bottom of the reaction tank, a negative pressure pipe section is provided on the liquid inlet pipeline, and the reflux pipeline is connected to the negative pressure pipe section.

[0010] In a possible implementation, the negative pressure pipe section includes a first pipe section and a second pipe section. The first pipe section and the second pipe section are hermetically connected by a flange. A necking pipe is provided at the end of the first pipe section connecting the second pipe section. A first chamber and a second chamber are sequentially arranged inside the second pipe section. A necking communication hole is provided between the first chamber and the second chamber. The necking pipe penetrates into the first chamber and extends to one side of the necking communication hole. The reflux pipeline is connected to the second pipe section and communicates with the first chamber.

[0011] In a possible implementation, a tapered hole with a gradually decreasing outer diameter is provided at the end of the necking pipe, and the tapered hole is coaxial with the necking communication hole.

[0012] In a possible implementation, a first tapered chamber is provided on one side of the first chamber close to the necking communication hole. The outer diameter of the first tapered chamber decreases from the first chamber towards the necking communication hole. A second tapered chamber is provided on one side of the second chamber close to the necking communication hole. The outer diameter of the second tapered chamber decreases from the second chamber towards the necking communication hole.

[0013] In a possible implementation, a liquid level gauge is provided on the upper part of the inner wall of the accommodation chamber, and an opening and closing valve is provided on the reflux pipeline.

[0014] The beneficial effects of a non-powered stirring reaction system for sulfuric acid production provided by the present utility model are as follows: Compared with the prior art, sulfuric acid liquid enters the inner cavity of the reaction tank from the liquid inlet pipeline through the liquid inlet. The sulfuric acid is spirally transmitted from top to bottom in the spiral channel in the inner cavity of the reaction tank. The heating tank dries the sulfuric acid liquid flowing through the spiral channel. The gas evaporated in the sulfuric acid liquid is discharged through the exhaust pipe at the top of the reaction tank. The sulfuric acid liquid passing through the spiral channel is discharged into the liquid outlet pipeline through the liquid outlet. Under the action of the booster pump, the sulfuric acid liquid in the liquid outlet pipeline returns to the liquid inlet pipeline again to perform cyclic drying on the sulfuric acid liquid until the required concentration is reached. A non-powered stirring reaction system for sulfuric acid production provided by the present utility model does not provide a corresponding stirring mechanism inside the reaction tank, ensuring the service life of the reaction tank, guaranteeing the production efficiency, and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of a power-free stirring reaction system for sulfuric acid production provided by the present utility model;

[0017] Figure 2 It is a schematic structural diagram of the reaction tank provided by the present utility model;

[0018] Figure 3 For Figure 1 It is a schematic structural diagram of area A in

[0019] In the figure:

[0020] 1. Reaction tank; 2. Heating tank; 3. Spiral channel; 4. Exhaust pipe; 5. Liquid inlet; 6. Liquid outlet; 7. Heat transfer oil; 8. Heating resistor; 9. Accommodation cavity; 10. Liquid level gauge; 11. Liquid inlet pipe; 12. Liquid outlet pipe; 13. Booster pump; 14. Return pipe; 15. First pipe section; 16. Second pipe section; 17. Necking pipe; 18. First chamber; 19. Second chamber; 20. Necking communication hole; 21. Conical hole; 22. First conical cavity; 23. Second conical cavity; 24. Opening and closing valve. Specific embodiments

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0022] In the claims, the description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are all used to distinguish different objects and are not used to describe a specific order.

[0023] In the claims, description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, for orientation terms, such as the use of terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. to indicate the orientation or positional relationship are based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the specific protection scope of the present utility model.

[0024] Please refer to Figure 1 and Figure 2 Now, a non-powered stirring reaction system for sulfuric acid production provided by the present utility model will be described. A non-powered stirring reaction system for sulfuric acid production includes a reaction tank 1, a liquid inlet pipe 11 and a liquid outlet pipe 12. A heating tank 2 is arranged in the middle of the inner cavity of the reaction tank 1. A spiral channel 3 is spirally arranged from top to bottom in the inner cavity of the reaction tank 1. The spiral channel 3 surrounds the outer periphery of the heating tank 2. An exhaust pipe 4 is arranged at the top of the reaction tank 1. A liquid inlet 5 is tangentially arranged on the upper part of the side wall of the reaction tank 1. A liquid outlet 6 is tangentially arranged on the lower part of the side wall of the reaction tank 1. The liquid inlet 5 is located at the upper port of the spiral channel 3. The liquid outlet 6 is located at the lower port of the spiral channel 3. The liquid inlet pipe 11 is connected to the liquid inlet 5. The liquid outlet pipe 12 is connected to the liquid outlet 6. The liquid inlet pipe 11 and the liquid outlet pipe 12 are connected end to end through a booster pump 13.

[0025] A non-powered stirring reaction system for sulfuric acid production provided by the present utility model, compared with the prior art, sulfuric acid liquid enters the inner cavity of the reaction tank 1 from the liquid inlet pipe 11 through the liquid inlet 5. The sulfuric acid is spirally transmitted from top to bottom in the spiral channel 3 in the inner cavity of the reaction tank 1. The heating tank 2 convects and dries the sulfuric acid liquid flowing through the spiral channel 3. The gas evaporated in the sulfuric acid liquid is discharged through the exhaust pipe 4 at the top of the reaction tank 1. The sulfuric acid liquid passing through the spiral channel 3 is discharged into the liquid outlet pipe 12 through the liquid outlet 6. Under the action of the booster pump 13, the sulfuric acid liquid in the liquid outlet pipe 12 returns to the liquid inlet pipe 11 again to circularly dry the sulfuric acid liquid until the required concentration is reached. A non-powered stirring reaction system for sulfuric acid production provided by the present utility model does not provide a corresponding stirring mechanism in the reaction tank 1, ensuring the service life of the reaction tank 1, guaranteeing the production efficiency and reducing the cost.

[0026] Please refer to Figure 2, the inner cavity of the heating tank 2 is filled with heat-conducting oil 7, and a heating resistor 8 for heating the heat-conducting oil 7 is arranged in the inner cavity of the heating tank 2. The upper end of the heating resistor 8 is connected to a power supply to heat the heat-conducting oil 7, and then the sulfuric acid liquid flowing through the spiral channel 3 is heated and dried.

[0027] Specifically, the spiral channel 3 is fixedly welded to the inner peripheral wall of the reaction tank 1, and an air vent gap is arranged between the spiral channel 3 and the heating tank 2. Under the action of centrifugal force, the sulfuric acid liquid entering the spiral channel 3 will rotate downward along one side of the inner peripheral wall of the reaction tank 1. The air vent gap communicates with multiple layers of spiral channels 3 from top to bottom, improving the exhaust effect.

[0028] In addition, a receiving cavity 9 is arranged at the bottom of the inner cavity of the reaction tank 1, and the receiving cavity 9 communicates with the air vent gap. When the sulfuric acid liquid flows along the spiral channel 3, a small part of the sulfuric acid liquid will fall to the lower layer of the spiral channel 3 through the air vent gap, and some sulfuric acid liquid will fall into the receiving cavity 9 at the bottom of the inner cavity of the reaction tank 1. Among them, a return pipeline 14 communicating with the receiving cavity 9 is arranged at the bottom of the reaction tank 1, and a negative pressure pipe section is arranged on the liquid inlet pipeline 11, and the return pipeline 14 is connected to the negative pressure pipe section. The sulfuric acid liquid falling into the receiving cavity 9 flows through the return pipeline 14 to the negative pressure pipe section and enters the reaction tank 1 again for drying and heating.

[0029] Please refer to Figure 3 , the negative pressure pipe section includes a first pipe section 15 and a second pipe section 16. The first pipe section 15 and the second pipe section 16 are hermetically connected by a flange. A necking pipe 17 is arranged at the end where the first pipe section 15 is connected to the second pipe section 16. A first chamber 18 and a second chamber 19 are sequentially arranged inside the second pipe section 16. A necking communication hole 20 is arranged between the first chamber 18 and the second chamber 19. The necking pipe 17 penetrates into the first chamber 18 and extends to one side of the necking communication hole 20. The return pipeline 14 is connected to the second pipe section 16 and communicates with the first chamber 18. The sulfuric acid liquid passes through the necking pipe 17 of the first pipe section 15 and enters the first chamber 18 of the second pipe section 16. Due to the change in the flow-through area of the necking pipe 17 and the necking communication hole 20, the flow rate of the sulfuric acid solution in the necking pipe 17 will increase under the hydraulic pressure. At this time, a negative pressure will be formed outside the necking pipe 17 in the first chamber 18. The sulfuric acid liquid in the return pipeline 14 is sucked into the first chamber 18 and then mixed with the sulfuric acid liquid entering from the necking pipe 17 and returns to the reaction tank 1 again for heating and drying. In addition, in order to ensure the return effect of the sulfuric acid liquid in the return pipeline 14, a power pump can also be arranged on the return pipeline 14.

[0030] Specifically, a tapered hole 21 with a gradually decreasing outer diameter is provided at the end of the necking tube 17. The tapered hole 21 is coaxial with the necking communication hole 20. The tapered hole 21 can further increase the flow rate and hydraulic pressure of the sulfuric acid liquid passing through the necking tube 17, thereby increasing the negative pressure of the sulfuric acid liquid flowing from the reflux pipe 14 to the first chamber 18.

[0031] Specifically, a first tapered chamber 22 is provided on one side of the first chamber 18 close to the necking communication hole 20. The outer diameter of the first tapered chamber 22 decreases from the first chamber 18 towards the necking communication hole 20. The first tapered chamber 22 is conducive to the mixing of the refluxed sulfuric acid liquid and the sulfuric acid liquid passing through the necking tube 17. A second tapered chamber 23 is provided on one side of the second chamber 19 close to the necking communication hole 20. The outer diameter of the second tapered chamber 23 decreases from the second chamber 19 towards the necking communication hole 20. The second tapered chamber 23 can evenly diffuse the sulfuric acid liquid passing through the necking communication hole 20 into the second chamber 19 for transmission.

[0032] Please refer to Figure 2 , a liquid level gauge 10 is provided on the upper part of the inner wall of the accommodation chamber 9, and an opening and closing valve 24 is provided on the reflux pipe 14. The liquid level gauge 10 can detect the liquid level height of the sulfuric acid solution in the accommodation chamber 9. When the liquid level of the sulfuric acid liquid in the accommodation chamber 9 reaches the liquid level gauge 10, the liquid level gauge 10 can give an alarm through an external alarm light, and then the operator can open the above-mentioned opening and closing valve 24. If the sulfuric acid solution in the accommodation chamber 9 does not reach the height of the liquid level gauge 10, the opening and closing valve 24 can be in a closed state.

[0033] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A non-powered stirring reaction system for sulfuric acid production, characterized in that: The invention comprises a reaction tank (1), a liquid inlet pipe (11) and a liquid outlet pipe (12); a heating tank (2) is arranged in the middle of the inner cavity of the reaction tank (1); a spiral channel (3) is arranged spirally from top to bottom in the inner cavity of the reaction tank (1); the spiral channel (3) is arranged around the outer periphery of the heating tank (2); an exhaust pipe (4) is arranged on the top of the reaction tank (1); a liquid inlet (5) is tangentially arranged on the upper part of the side wall of the reaction tank (1); a liquid outlet (6) is tangentially arranged on the lower part of the side wall of the reaction tank (1); the liquid inlet (5) is located at the upper end of the spiral channel (3); the liquid outlet (6) is located at the lower end of the spiral channel (3); the liquid inlet pipe (11) is connected to the liquid inlet (5); the liquid outlet pipe (12) is connected to the liquid outlet (6); the liquid inlet pipe (11) and the liquid outlet pipe (12) are connected end to end via a booster pump (13).

2. The unpowered stirring reaction system for sulfuric acid production according to claim 1, characterized in that: The inner cavity of the heating tank (2) is filled with heat-conducting oil (7), and the inner cavity of the heating tank (2) is provided with a heating resistor (8) for heating the heat-conducting oil (7).

3. The unpowered stirring reaction system for sulfuric acid production according to claim 1, characterized in that: The spiral channel (3) is fixed to the inner peripheral wall of the reaction tank (1) by welding, and a ventilation gap is provided between the spiral channel (3) and the heating tank (2).

4. The unpowered stirring reaction system for sulfuric acid production according to claim 3, characterized in that: The bottom of the inner cavity of the reaction tank (1) is provided with a receiving cavity (9), and the receiving cavity (9) is connected to the ventilation gap.

5. The unpowered stirring reaction system for sulfuric acid production according to claim 4, characterized in that: A reflux pipe (14) communicating with the accommodating chamber (9) is arranged at the bottom of the reaction tank (1), a negative pressure pipe section is arranged on the liquid inlet pipe (11), and the reflux pipe (14) is connected to the negative pressure pipe section.

6. The unpowered stirring reaction system for sulfuric acid production according to claim 5, characterized in that: The negative pressure pipe section comprises a first pipe section (15) and a second pipe section (16); the first pipe section (15) and the second pipe section (16) are sealed and connected via a flange; a necking tube (17) is provided at the end of the first pipe section (15) connected to the second pipe section (16); a first chamber (18) and a second chamber (19) are sequentially provided inside the second pipe section (16); a necking connecting hole (20) is provided between the first chamber (18) and the second chamber (19); the necking tube (17) penetrates into the first chamber (18) and extends to one side of the necking connecting hole (20); and the return pipe (14) is connected to the second pipe section (16) and communicates with the first chamber (18).

7. The unpowered stirring reaction system for sulfuric acid production according to claim 6, characterized in that: The end of the necked tube (17) is provided with a tapered hole (21) with a decreasing outer diameter, and the tapered hole (21) is coaxial with the necked connecting hole (20).

8. The unpowered stirring reaction system for sulfuric acid production according to claim 6, characterized in that: A first conical cavity (22) is provided on a side of the first chamber (18) close to the necked connecting hole (20), and the outer diameter of the first conical cavity (22) decreases from the first chamber (18) toward the necked connecting hole (20); a second conical cavity (23) is provided on a side of the second chamber (19) close to the necked connecting hole (20), and the outer diameter of the second conical cavity (23) decreases from the second chamber (19) toward the necked connecting hole (20).

9. The unpowered stirring reaction system for sulfuric acid production according to claim 5, characterized in that: A liquid level meter (10) is provided on the upper portion of the inner wall of the accommodating chamber (9), and an opening and closing valve (24) is provided on the reflux pipe (14).

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