A hydrochloric acid negative pressure recovery device

Abstract

The utility model provides a hydrochloric acid negative pressure recovery device, which belongs to the technical field of hydrochloric acid recovery. It includes a recovery box, which is respectively provided with a waste acid liquid chamber, a recovery chamber, and a negative pressure chamber from top to bottom, a stirring component is provided in the waste acid liquid chamber, a water pump is provided at the bottom of the recovery chamber, a ring-shaped nozzle connected to the water pump is provided at the top of the recovery chamber, and a negative pressure pump connected to the negative pressure chamber is provided at the top of the recovery box. The utility model can absorb the volatilized hydrochloric acid flowing into the recovery chamber into the sprayed pure water, and the aqueous solution absorbing the hydrochloric acid flows back into the pure water to form dilute hydrochloric acid, effectively preventing the finally recovered hydrochloric acid from volatilizing into the atmosphere, so as to prevent the hydrochloric acid gas from being discharged into the atmosphere and affecting the external environment; the negative pressure pump is started to vacuumize the negative pressure chamber, and then the gas transmission control valve is opened in sequence, so that negative pressure is formed in the waste acid liquid chamber and the recovery chamber, so that the hydrochloric acid volatilized from the waste acid liquid chamber quickly flows into the recovery chamber, thereby accelerating the recovery efficiency of the hydrochloric acid, so as to prevent the hydrochloric acid gas from being discharged into the atmosphere.

Description

Technical Field

[0001] The utility model provides a hydrochloric acid negative pressure recovery device, belonging to the technical field of hydrochloric acid recovery. Background Art

[0002] Hydrochloric acid, scientifically known as hydrochloric acid, is an aqueous solution of hydrogen chloride. Hydrochloric acid is a common chemical. As one of the important chemical raw materials, it is widely used in metallurgy, food, medicine, dyes and other industries. It is also used as a surface oxide cleaning agent in the steel production process. Therefore, a large amount of waste hydrochloric acid liquid is inevitably generated in the industrial production process. Since a large amount of waste hydrochloric acid liquid contains a considerable amount of hydrochloric acid, it is usually necessary to use a recovery device to separate and recover the hydrochloric acid in the waste hydrochloric acid liquid.

[0003] The existing hydrochloric acid recovery device can basically separate and recover the hydrochloric acid in the waste hydrochloric acid solution, but there are still certain defects: when recovering the hydrochloric acid in the waste hydrochloric acid solution, the waste hydrochloric acid solution in the recovery box 1 is often stirred by a stirring component, so that the hydrochloric acid in the waste hydrochloric acid solution is volatilized, and the volatilized hydrochloric acid flows into the condenser through the gas pipe for condensation, and then the hydrochloric acid is cooled and liquefied for discharge and collection. However, since the hydrochloric acid cooled and liquefied is usually concentrated hydrochloric acid, the concentrated hydrochloric acid has strong volatility, and the recovered concentrated hydrochloric acid will form acid mist and be discharged into the atmosphere, thereby affecting the external environment; and since the hydrochloric acid in the waste hydrochloric acid solution has a certain volatility, it is impossible to directly evacuate the recovery box, otherwise the hydrochloric acid gas will be discharged into the atmosphere, and the rate at which the hydrochloric acid gas flows into the condenser through its own volatility is often relatively slow. Based on this, the utility model provides a hydrochloric acid negative pressure recovery device. Utility Model Content

[0004] The technical problem solved by the utility model is that the recovered concentrated hydrochloric acid will form acid mist and be discharged into the atmosphere, thereby affecting the external environment; the recovery box cannot be directly evacuated, otherwise the hydrochloric acid gas will be discharged into the atmosphere, and the rate at which the hydrochloric acid gas flows into the condenser due to its own volatility is often relatively slow.

[0005] In order to solve the technical problem, the technical solution provided by the utility model is: a hydrochloric acid negative pressure recovery device, including a recovery box, the recovery box is respectively provided with a waste acid liquid chamber, a recovery chamber, and a negative pressure chamber from top to bottom, a stirring assembly is provided in the waste acid liquid chamber, a water pump is provided at the bottom of the recovery chamber, an annular nozzle connected to the water pump is provided at the top of the recovery chamber, a negative pressure pump connected to the negative pressure chamber is provided at the top of the recovery box, an air supply pipe 1 is provided between the upper wall of the waste acid liquid chamber and the upper wall of the recovery chamber, an air supply pipe 2 is provided between the upper wall of the recovery chamber and the negative pressure chamber, and air supply control valves are provided on both the air supply pipe 1 and the air supply pipe 2.

[0006] Furthermore, a liquid inlet 1 is provided on the upper wall of one side of the waste acid liquid chamber, a liquid outlet 1 is provided on the upper wall of the other side of the waste acid liquid chamber, a liquid inlet 2 is provided on the upper wall of one side of the recovery chamber, and a liquid outlet 2 is provided on the upper wall of the other side of the recovery chamber, and liquid inlet 1, liquid outlet 1, liquid inlet 2, and liquid outlet 2 are all provided with infusion control valves.

[0007] Furthermore, a hydrochloric acid concentration sensor is provided in the negative pressure chamber, and a controller is provided on the side wall of the recovery box.

[0008] Furthermore, a partition is provided between the waste acid liquid chamber and the recovery chamber, and between the recovery chamber and the negative pressure chamber.

[0009] Furthermore, a motor is provided at the bottom of the recycling box, and the stirring assembly includes a stirring rod fixedly connected to the output end of the motor, and a plurality of stirring blades are equidistantly provided on the stirring rod.

[0010] Furthermore, the water outlet of the water pump is connected to the water inlet of the annular nozzle via a delivery pipe, and a plurality of nozzles are equidistantly arranged at the bottom of the annular nozzle.

[0011] Beneficial effects of the utility model:

[0012] 1. By starting the water pump, the pure water in the recovery chamber flows into the annular nozzle through the delivery pipe and is sprayed out through multiple nozzles, so that the volatile hydrochloric acid flowing into the recovery chamber can be absorbed into the sprayed pure water, and the aqueous solution absorbing the hydrochloric acid flows back into the pure water to form dilute hydrochloric acid. Since the content of hydrogen chloride in the dilute hydrochloric acid is low, most of the hydrogen chloride molecules are captured by water molecules, so its volatility is relatively low, which effectively prevents the final recovered hydrochloric acid from volatilizing into the atmosphere, so as to prevent the hydrochloric acid gas from being discharged into the atmosphere and affecting the external environment;

[0013] 2. Start the negative pressure pump to evacuate the negative pressure chamber, then open the gas control valve on the gas pipe 2 and the gas control valve on the gas pipe 1 in sequence, so that negative pressure is formed in the waste acid liquid chamber and the recovery chamber, so that the hydrochloric acid volatilized from the waste acid liquid chamber flows quickly into the recovery chamber, and the air in the recovery chamber flows quickly into the negative pressure chamber, thereby accelerating the recovery efficiency of hydrochloric acid to prevent the hydrochloric acid gas from being discharged into the atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a hydrochloric acid negative pressure recovery device of the utility model. Figure 1 .

[0015] Figure 2 This is a schematic diagram of the structure of a hydrochloric acid negative pressure recovery device of the utility model. Figure 2 .

[0016] Figure 3 The utility model is a schematic plan view of a hydrochloric acid negative pressure recovery device.

[0017] Figure 4 The utility model is a schematic diagram of the annular nozzle structure of a hydrochloric acid negative pressure recovery device.

[0018] 1. Recovery box; 2. Waste acid liquid chamber; 3. Recovery chamber; 4. Negative pressure chamber; 5. Stirring assembly; 6. Water pump; 7. Annular nozzle; 8. Negative pressure pump; 9. Gas pipe 1; 10. Gas pipe 2; 11. Gas control valve; 12. Liquid inlet 1; 13. Liquid outlet 1; 14. Liquid inlet 2; 15. Liquid outlet 2; 16. Liquid infusion control valve; 17. Hydrochloric acid concentration sensor; 18. Partition; 19. Motor; 20. Stirring rod; 21. Stirring blade; 22. Delivery pipe; 23. Sprinkler. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings.

[0020] According to the attached Figure 1 , 2 As shown in Figure 3: The utility model provides a hydrochloric acid negative pressure recovery device: it includes a recovery box 1, which is respectively provided with a waste acid liquid chamber 2, a recovery chamber 3, and a negative pressure chamber 4 from top to bottom, and a partition 18 is provided between the waste acid liquid chamber 2 and the recovery chamber 3, and between the recovery chamber 3 and the negative pressure chamber 4, so as to make full use of the internal space of the recovery box 1 to separate the waste acid liquid chamber 2, the recovery chamber 3, and the negative pressure chamber 4, a liquid inlet 12 is provided on the upper wall on one side of the waste acid liquid chamber 2, a liquid outlet 13 is provided on the upper wall on the other side of the waste acid liquid chamber 2, a liquid inlet 2 14 is provided on the upper wall on one side of the recovery chamber 3, and a liquid outlet 2 15 is provided on the upper wall on the other side of the recovery chamber 3, and an infusion control valve 16 is provided on the liquid inlet 12, the liquid outlet 13, the liquid inlet 2 14, and the liquid outlet 2 15, waste hydrochloric acid solution is added to the waste acid liquid chamber 2 through the liquid inlet 12, and pure water is added to the recovery chamber 3 through the liquid inlet 2 14.

[0021] According to the attached Figure 3 As shown: a stirring assembly 5 is provided in the waste acid liquid chamber 2, a motor 19 is provided at the bottom of the recovery box 1, the stirring assembly 5 includes a stirring rod 20 fixedly connected to the output end of the motor 19, and a plurality of stirring blades 21 are equidistantly provided on the stirring rod 20. By starting the motor 19 to drive the stirring rod 20 to rotate, the stirring blades 21 are driven to rotate, so that the waste hydrochloric acid solution in the waste acid liquid chamber 2 can be fully stirred, so that the hydrochloric acid in the waste hydrochloric acid solution can be volatilized.

[0022] According to the attached Figure 3 , 4As shown: an air delivery pipe 9 is provided between the upper wall of the waste acid liquid chamber 2 and the upper wall of the recovery chamber 3, a water pump 6 is provided at the bottom of the recovery chamber 3, and an annular nozzle 7 connected to the water pump 6 is provided at the top of the recovery chamber 3. The water outlet of the water pump 6 is connected to the water inlet of the annular nozzle 7 by a delivery pipe 22, and a plurality of nozzles 23 are equidistantly provided at the bottom of the annular nozzle 7. The hydrochloric acid volatilized from the waste acid liquid chamber 2 flows into the recovery chamber 3 through the air delivery pipe 9. By starting the water pump 6, the pure water in the recovery chamber 3 flows into the annular nozzle 7 through the delivery pipe 22 and is sprayed out through the plurality of nozzles 23, so that the volatilized hydrochloric acid flowing into the recovery chamber 3 can be absorbed into the sprayed pure water, and the aqueous solution absorbing the hydrochloric acid flows back into the pure water to form dilute hydrochloric acid. Since the content of hydrogen chloride in the dilute hydrochloric acid is low, most of the hydrogen chloride molecules are captured by water molecules, so its volatility is relatively low, which effectively prevents the finally recovered hydrochloric acid from volatilizing into the atmosphere, so as to prevent the hydrochloric acid gas from being discharged into the atmosphere and affecting the external environment.

[0023] According to the attached Figure 1 , 3 As shown: a negative pressure pump 8 connected to the negative pressure chamber 4 is provided on the top of the recovery box 1, an air supply pipe 10 is provided between the upper wall of the recovery chamber 3 and the negative pressure chamber 4, and an air supply control valve 11 is provided on both the air supply pipe 1 9 and the air supply pipe 10, and a hydrochloric acid concentration sensor 17 is provided in the negative pressure chamber 4. The hydrochloric acid concentration sensor 17 monitors the hydrochloric acid concentration in the negative pressure chamber 4. When the hydrochloric acid flowing from the air supply pipe 10 into the negative pressure chamber 4 reaches a set threshold, the pure water that captures the hydrochloric acid gas in the recovery chamber 3 is discharged. Discharge, add new pure water, continue to recover hydrochloric acid, start the negative pressure pump 8 to evacuate the negative pressure chamber 4, and then open the gas control valve 11 on the gas pipe 2 10 and the gas control valve 11 on the gas pipe 1 9 in turn, so that negative pressure is formed in the waste acid liquid chamber 2 and the recovery chamber 3, so that the hydrochloric acid volatilized in the waste acid liquid chamber 2 flows quickly into the recovery chamber 3, and the air in the recovery chamber 3 flows quickly into the negative pressure chamber 4, thereby accelerating the recovery efficiency of the hydrochloric acid.

[0024] As an optional embodiment, a controller is provided on the side wall of the recovery box 1, and control buttons and a display screen are provided on the controller. The controller is used to receive the signal of the hydrochloric acid concentration sensor 17 and display it on the display screen in the form of a numerical value. The control button can control the opening and closing of the motor 19, the infusion control valve 16, the gas supply control valve 11, the water pump 6, and the negative pressure pump 8. The control method of the utility model is to automatically control through the controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The utility model is mainly used to protect mechanical devices, so the utility model will no longer explain the control method and circuit connection in detail.

[0025] Principle of the utility model

[0026] When in use, waste hydrochloric acid solution is added to the waste acid liquid chamber 2 through the liquid inlet 12, pure water is added to the recovery chamber 3 through the liquid inlet 2 14, and the negative pressure chamber 4 is evacuated by starting the negative pressure pump 8, and then the gas supply control valve 11 on the gas supply pipe 2 10 and the gas supply control valve 11 on the gas supply pipe 1 9 are opened in sequence. When the gas supply control valve 11 on the gas supply pipe 1 9 is opened, the gas supply control valve 11 on the gas supply pipe 2 10 is closed to prevent the hydrochloric acid gas from being discharged into the atmosphere, so that negative pressure is formed in the waste acid liquid chamber 2 and the recovery chamber 3, so that the hydrochloric acid volatilized in the waste acid liquid chamber 2 flows quickly into the recovery chamber 3, and the air in the recovery chamber 3 flows quickly into the negative pressure chamber 4, so as to accelerate the recovery efficiency of the hydrochloric acid, and the motor 19 is started to drive the stirring rod 20 to rotate, and then drive the stirring blade 21 to rotate, so that the waste hydrochloric acid solution in the waste acid liquid chamber 2 can be fully stirred, so that the hydrochloric acid in the waste hydrochloric acid solution is volatilized. The hydrochloric acid volatilized from the waste acid liquid chamber 2 flows into the recovery chamber 3 through the gas pipe 1 9. By starting the water pump 6, the pure water in the recovery chamber 3 flows into the annular nozzle 7 through the delivery pipe 22 and is sprayed out through multiple nozzles 23. The volatilized hydrochloric acid flowing into the recovery chamber 3 can be absorbed into the sprayed pure water, and the aqueous solution absorbing the hydrochloric acid flows back into the pure water to form dilute hydrochloric acid. Since the content of hydrogen chloride in the dilute hydrochloric acid is low, most of the hydrogen chloride molecules are captured by water molecules, so its volatility is relatively low, which effectively prevents the hydrochloric acid finally recovered from volatilizing into the atmosphere, so as to prevent the hydrochloric acid gas from being discharged into the atmosphere and affecting the external environment. The hydrochloric acid concentration in the negative pressure chamber 4 is monitored by the hydrochloric acid concentration sensor 17. When the hydrochloric acid flowing into the negative pressure chamber 4 from the gas pipe 2 10 reaches the set threshold, the pure water cannot effectively capture the hydrochloric acid at this time, and the pure water capturing the hydrochloric acid gas in the recovery chamber 3 is discharged, and new pure water is added to continue the recovery of the hydrochloric acid.

[0027] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A hydrochloric acid negative pressure recovery device, comprising a recovery box (1), characterized in that: The recovery box (1) is provided with a waste acid liquid chamber (2), a recovery chamber (3), and a negative pressure chamber (4) from top to bottom, respectively; a stirring assembly (5) is provided in the waste acid liquid chamber (2); a water pump (6) is provided at the bottom of the recovery chamber (3); a ring-shaped nozzle (7) connected to the water pump (6) is provided at the top of the recovery chamber (3); a negative pressure pump (8) connected to the negative pressure chamber (4) is provided at the top of the recovery box (1); an air supply pipe (1) (9) is provided between the upper wall of the waste acid liquid chamber (2) and the upper wall of the recovery chamber (3); an air supply pipe (2) (10) is provided between the upper wall of the recovery chamber (3) and the negative pressure chamber (4); and air supply control valves (11) are provided on the air supply pipe (1) and the air supply pipe (2) (10).

2. A hydrochloric acid negative pressure recovery device according to claim 1, characterized in that: A first liquid inlet (12) is provided on the upper wall of one side of the waste acid liquid chamber (2), a first liquid outlet (13) is provided on the upper wall of the other side of the waste acid liquid chamber (2), a second liquid inlet (14) is provided on the upper wall of one side of the recovery chamber (3), a second liquid outlet (15) is provided on the upper wall of the other side of the recovery chamber (3), and a liquid infusion control valve (16) is provided on the first liquid inlet (12), the first liquid outlet (13), the second liquid inlet (14), and the second liquid outlet (15).

3. A hydrochloric acid negative pressure recovery device according to claim 1, characterized in that: A hydrochloric acid concentration sensor (17) is provided in the negative pressure chamber (4), and a controller is provided on the side wall of the recovery box (1).

4. A hydrochloric acid negative pressure recovery device according to claim 1, characterized in that: A partition plate (18) is provided between the waste acid liquid chamber (2) and the recovery chamber (3), and between the recovery chamber (3) and the negative pressure chamber (4).

5. A hydrochloric acid negative pressure recovery device according to claim 1, characterized in that: A motor (19) is provided at the bottom of the recycling box (1), and the stirring assembly (5) comprises a stirring rod (20) fixedly connected to the output end of the motor (19), and a plurality of stirring blades (21) are equidistantly provided on the stirring rod (20).

6. A hydrochloric acid negative pressure recovery device according to claim 1, characterized in that: The water outlet of the water pump (6) is connected to the water inlet of the annular nozzle (7) via a delivery pipe (22), and a plurality of nozzles (23) are equidistantly arranged at the bottom of the annular nozzle (7).

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