A waste gas recovery device for tin stripping water

Abstract

The present application relates to the technical field of waste gas recovery, and provides a waste gas recovery device for tin stripping water, which includes a tank body and a waste gas collection pipe arranged above the tank body, the waste gas collection pipe includes an outlet pipe fixedly arranged in the tank body, a recovery pipe fixedly connected to the outlet pipe, and a delivery pipe fixedly connected to the recovery pipe in a direction away from the tank body, the recovery pipe is arranged in an S shape, an absorption liquid is arranged in the recovery pipe, the liquid level of the absorption liquid is higher than the height of the recovery pipe at the trough, and lower than the height of the recovery pipe at the peak, the delivery pipe is used to deliver the absorption liquid to the recovery pipe, the recovery pipe is provided with a drain pipe at the trough, and the delivery pipe and the drain pipe are both provided with a control valve. The present application has the beneficial effect of reducing the recovery cost of nitric acid waste gas.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas recovery, and in particular to a waste gas recovery device for tin stripping water. Background Art

[0002] In the production process of tin stripping water tanks, nitric acid is often used as the main component of tin stripping water. Nitric acid vapor will be generated in the production of tin stripping water. However, if the nitric acid waste gas is directly discharged, it will pollute the environment and pose a safety hazard. Therefore, through the waste gas recovery technology, due to its important application value in this field, it can reduce volatilization, that is, reduce environmental pollution from the source and reduce volatilization loss and waste.

[0003] At present, the commonly used waste gas recovery method is to guide the waste gas to the absorption tower through a pipeline and use the absorption liquid to absorb the waste gas. However, when this method is used to treat the absorption liquid containing nitric acid, the absorption tower usually occupies a large area and the corresponding cost will also increase, so further improvement is needed. Utility Model Content

[0004] In order to reduce the recovery cost of nitric acid waste gas, the present application provides a waste gas recovery device for tin stripping water.

[0005] The present application provides a waste gas recovery device for tin stripping water, which adopts the following technical solution:

[0006] A waste gas recovery device for tin stripping water comprises a tank body and a waste gas collecting pipe arranged above the tank body, wherein the waste gas collecting pipe comprises, in sequence in a direction away from the tank body, an outlet pipe fixedly arranged through the tank body, a recovery pipe fixedly connected to the outlet pipe, and a delivery pipe fixedly connected to the recovery pipe, wherein the recovery pipe is arranged in an S shape, and an absorption liquid is arranged in the recovery pipe, wherein the liquid level of the absorption liquid is higher than the height of the recovery pipe at a wave trough and lower than the height of the recovery pipe at a wave crest, and wherein the delivery pipe is used for delivering the absorption liquid into the recovery pipe, and a discharge pipe is arranged at the wave trough of the recovery pipe, and control valves are arranged on both the delivery pipe and the discharge pipe.

[0007] By adopting the above technical solution, the absorption liquid is transported to the recovery pipe through the delivery pipe. Since the recovery pipe is arranged in an S shape, when the absorption liquid falls into the trough of the recovery pipe, it will be temporarily stored to form a waste gas treatment chamber. When the liquid level of the absorption liquid is lower than the height of the recovery pipe at the crest, the corresponding product can be produced in the tank body, and the nitric acid vapor rises through the gas outlet pipe into the recovery pipe and is absorbed by the absorption liquid. When a certain amount is absorbed and the tank body stops working, the control valve arranged on the drain pipe is opened to recover the absorption liquid through the drain pipe. The waste gas collection pipe is used as a simple waste gas treatment chamber and absorption liquid storage pipe to reduce the cost of setting up an absorption tower.

[0008] Preferably, the absorption liquid is water.

[0009] By adopting the above technical scheme, since the absorption liquid is water and its absorption rate of nitric acid is high, it can be absorbed by water in time and can directly pass through the tank body through the drain pipe into the tin stripping water product for continued use. Therefore, in the production and configuration of tin stripping water, volatilization is reduced, that is, environmental pollution is reduced from the source, and volatilization loss and waste are reduced. It also reduces other processing costs brought about by recovering nitric acid through other alkaline solutions as absorption liquids, thereby increasing the recovery efficiency of nitric acid waste gas.

[0010] Preferably, a pressure regulating valve is provided on the air outlet pipe.

[0011] By adopting the above technical solution, a pressure regulating valve is set on the outlet pipe to adjust the pressure of the nitric acid waste gas entering the recovery pipe to ensure uniform distribution of the waste gas in the pipeline, further improving the treatment effect and the absorption efficiency of nitric acid.

[0012] Preferably, a control component for controlling the connection between the air outlet pipe and the recovery pipe is provided in the recovery pipe.

[0013] By adopting the above technical solution, although the outlet pipe, the recovery pipe and the delivery pipe can be connected, when the saturated absorption liquid in the recovery pipe is discharged through the drain pipe, the nitric acid vapor may diffuse into the waste gas collection pipe and may be discharged from the drain pipe, causing pollution. If the method of discharging and delivering the absorption liquid is selected, the absorption rate of nitric acid by the absorption liquid may be reduced. Therefore, a control component is provided to control the connection between the recovery pipe and the outlet pipe to improve the recovery efficiency of the absorption liquid for nitric acid waste gas.

[0014] Preferably, the control assembly includes a control plate rotatably connected to the inner wall of the recovery pipe and a control member that forces the control plate to rotate and abut against the inner wall of the recovery pipe. The height of the connection between the control plate and the recovery pipe is higher than the height of the recovery pipe at the trough and lower than the height of the absorption liquid level.

[0015] By adopting the above technical solution, when the control valve on the drain pipe is opened, the absorption liquid in the recovery pipe is discharged along with the drain pipe, and the height of the absorption liquid is reduced. When it is reduced to a height lower than the free end of the control board, the water pressure on the control board is gradually reduced. At this time, the control board rotates under the elastic force of the control member, and when it rotates to abut against the inner wall of the recovery pipe, the connection between the recovery pipe and the outlet pipe is disconnected to reduce the discharge of nitric acid vapor along with the drain pipe. At this time, due to the control board, a accommodating cavity for nitric acid vapor to be retained can be formed between the outlet pipe and the recovery pipe to reduce the possibility of stopping the work in the tank. After closing the drain pipe and opening the control valve on the delivery pipe, the absorption liquid is input into the recovery pipe. As the liquid level of the absorption liquid rises, when the liquid level is higher than the trough of the recovery pipe, the water pressure of the absorption liquid gradually forces the control board to rotate in a direction away from the inner wall of the recovery pipe, so that the recovery pipe and the outlet pipe are connected, and the nitric acid waste gas enters the absorption liquid for absorption.

[0016] Preferably, a rotating rod is rotatably provided on the control plate, and the rotating rod is fixedly connected to the inner wall of the recovery pipe. The control component is a torsion spring coaxially sleeved on the rotating rod, and both ends of the torsion spring are respectively fixedly connected to the recovery pipe and the control plate.

[0017] Preferably, the control member is a floating plate arranged on the lower surface of the control board.

[0018] Preferably, a sealing ring abutting against the control panel is fixedly connected to the inner wall of the recovery pipe.

[0019] By adopting the above technical solution and providing a sealing ring, the sealing effect when the abutting plate abuts against the inner wall of the recovery pipe to disconnect the recovery pipe from the air outlet pipe is improved.

[0020] In summary, the utility model has the following beneficial effects:

[0021] 1. By providing an exhaust gas collection pipe as a simple exhaust gas treatment room and absorption liquid storage pipe, the cost of setting up an absorption tower can be reduced.

[0022] 2. Since the absorption liquid is water and its absorption rate for nitric acid is high, the recovery efficiency of nitric acid waste gas can be enhanced; and after absorption, it can be used as a nitric acid liquid with a lower concentration to reduce other processing costs when recovering nitric acid through other alkaline solutions as absorption liquids.

[0023] 3. A control component is provided to control the connection between the recovery pipe and the gas outlet pipe, so as to improve the recovery efficiency of the nitric acid waste gas by the absorption liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0025] Figure 2 is a schematic cross-sectional structural diagram of the exhaust gas collection pipe in Example 1 of the present application;

[0026] Figure 3 is a schematic diagram of the structure of the control component in Example 2 of the present application;

[0027] Figure 4 is a schematic diagram of the structure of the torsion spring in Example 2 of the present application;

[0028] Figure 5 It is a schematic diagram of the structure of the floating plate in Example 2 of the present application.

[0029] Explanation of the reference numerals: 1. tank body; 2. exhaust gas collection pipe; 21. exhaust pipe; 211. pressure regulating valve; 22. recovery pipe; 221. liquid level sensor; 222. temperature sensor; 223. sealing ring; 23. delivery pipe; 3. absorption liquid; 4. drain pipe; 5. control valve; 6. control assembly; 61. control board; 62. control part. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 , further details of this application are given.

[0031] The embodiment of the present application discloses a waste gas recovery device for tin stripping water.

[0032] Embodiment 1:

[0033] A waste gas recovery device for tin stripping water, referring to Figure 1 , Figure 2 , including a tank body 1 and an exhaust gas collecting pipe 2 arranged above the tank body 1. In this embodiment, the cross-section of the exhaust gas collecting pipe 2 along its own radial direction is circular, that is, the exhaust gas collecting pipe 2 is arranged in a circular tube, and the exhaust gas collecting pipe 2 includes an outlet pipe 21, a recovery pipe 22 and a delivery pipe 23 in sequence in the direction away from the tank body 1.

[0034] The length direction of the gas outlet pipe 21 is perpendicular to the upper surface of the tank body 1, and the lower end of the gas outlet pipe 21 is fixedly penetrated through the upper surface of the tank body 1. The recovery pipe 22 is arranged in an S shape, the recovery pipe 22 is arranged horizontally, the crest end of the recovery pipe 22 is arranged close to the gas outlet pipe 21, one end of the recovery pipe 22 is fixedly connected to the upper end of the gas outlet pipe 21, and the recovery pipe 22 is provided with an absorption liquid 3 at the trough, and the liquid level of the absorption liquid 3 is higher than the height at the trough itself and lower than the height at the crest itself, so as to form a waste gas treatment chamber to absorb the nitric acid waste gas entering the recovery pipe 22 through the gas outlet pipe 21. In this embodiment, the absorption liquid 3 is specifically water.

[0035] Among them, the length direction of the delivery pipe 23 is parallel to the length direction of the outlet pipe 21, the lower end of the delivery pipe 23 is fixedly connected to the end of the recovery pipe 22 away from the outlet pipe 21, and the delivery pipe 23 is arranged close to the trough end of the recovery pipe 22. The delivery pipe 23 is used to transport new absorption liquid 3 to the recovery pipe 22.

[0036] For the treatment of the absorption liquid 3 after absorbing the nitric acid waste gas, in this embodiment, the recovery pipe 22 is located at the trough and fixedly penetrated with a drain pipe 4, the drain pipe 4 is fixedly connected with a control valve 5, and the delivery pipe 23 is also provided with a control valve 5 to control the new absorption liquid 3. It should be noted that the liquid outlet of the drain pipe 4 can be connected to the tank body 1 to enter the tin stripping water product for continued use, so in the production and configuration of tin stripping water, volatilization is reduced, that is, environmental pollution is reduced from the source, and volatilization loss and waste are reduced.

[0037] Furthermore, a pressure regulating valve 211 is provided on the gas outlet pipe 21 to adjust the pressure of the nitric acid waste gas flowing into the recovery pipe 22, so as to improve the uniform distribution of the nitric acid waste gas in the gas outlet pipe 21 and the recovery pipe 22, so as to further improve the absorption effect and efficiency of the waste gas by the absorption liquid 3. In order to facilitate real-time monitoring of the temperature and liquid level in the treatment chamber and ensure the stability and safety of the treatment process, in this embodiment, a liquid level sensor 221 and a temperature sensor 222 are provided in the recovery pipe 22. The liquid level sensor 221 and the temperature sensor 222 are both electrically connected to the solenoid valve (not shown in the figure), the solenoid valve is electrically connected to the host computer, and the control valve 5 on the delivery pipe 23 is electrically connected to the solenoid valve to transmit the corresponding monitored data to the host computer.

[0038] The implementation principle of the waste gas recovery device for tin stripping water in the embodiment of the present application is as follows: the absorption liquid 3 is transported to the recovery pipe 22 through the delivery pipe 23. Since the recovery pipe 22 is arranged in an S shape, when the absorption liquid 3 falls into the trough of the recovery pipe 22, it will be temporarily stored to form a waste gas treatment chamber. When the liquid level of the absorption liquid 3 is lower than the height of the recovery pipe 22 at the crest, the corresponding product can be produced in the tank body 1 at this time, and the nitric acid vapor rises through the outlet pipe 21 into the recovery pipe 22 and is absorbed by the absorption liquid 3. When a certain amount is absorbed and the tank body 1 stops working at this time, the control valve 5 arranged on the drain pipe 4 is opened at this time to recover the absorption liquid 3 through the drain pipe 4, or directly discharge it into the tank body 1. The waste gas collection pipe 2 is used as a simple waste gas treatment chamber and absorption liquid storage pipe to reduce the cost of setting up an absorption tower.

[0039] Embodiment 2:

[0040] Reference Figure 3 , Figure 4The difference from Example 1 is that a control component 6 for controlling the connection between the outlet pipe 21 and the recovery pipe 22 is provided in the recovery pipe 22. The control component 6 is used to control the connection between the recovery pipe 22 and the outlet pipe 21 to improve the recovery efficiency of the absorption liquid 3 for the nitric acid waste gas.

[0041] Specifically, the control assembly 6 specifically includes a control plate 61 rotatably connected to the inner wall of the recovery pipe 22 and a control member 62 that forces the control plate 61 to rotate and abut against the inner wall of the recovery pipe 22, wherein the control plate 61 is rotatably connected to a rotating rod, the rotating rod is fixedly connected to the inner wall of the recovery pipe 22, and the height of the connection with the recovery pipe 22 is higher than the height of the recovery pipe 22 at the trough, and lower than the height of the liquid level of the absorption liquid 3. In this embodiment, the control member 62 can be a torsion spring coaxially sleeved on the rotating rod, such as Figure 4 As shown, it can also be a floating plate fixedly connected to the lower surface of the control plate 61, such as Figure 5 shown.

[0042] It should be noted that when the control member 62 is a torsion spring, the two ends of the torsion spring are respectively fixedly connected to the recovery pipe 22 and the control plate 61. When the liquid level of the absorption liquid 3 is higher than the height of the control plate 61 at the rotating rod, as the liquid level of the absorption liquid 3 rises, the water pressure of the absorption liquid 3 forces the free end of the control plate 61 to rotate in a direction away from the wall of the recovery pipe 22, so that the recovery pipe 22 and the gas outlet pipe 21 are connected. When the control member 62 is a floating plate, as the height of the liquid level rises, the buoyancy of the floating plate drives the free end of the control plate 61 to rotate in a direction away from the wall of the recovery pipe 22, so that the recovery pipe 22 and the gas outlet pipe 21 are connected.

[0043] Furthermore, a sealing ring 223 abutting against the control board 61 is fixedly connected to the inner wall of the recovery pipe 22 .

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A waste gas recovery device for tin stripping water, characterized in that: The invention comprises a tank body (1) and an exhaust gas collection pipe (2) arranged above the tank body (1), wherein the exhaust gas collection pipe (2) comprises, in sequence in a direction away from the tank body (1), an exhaust pipe (21) fixedly arranged through the tank body (1), a recovery pipe (22) fixedly connected to the exhaust pipe (21), and a delivery pipe (23) fixedly connected to the recovery pipe (22), wherein the recovery pipe (22) is arranged in an S shape, wherein an absorption liquid (3) is arranged in the recovery pipe (22), wherein the liquid level of the absorption liquid (3) is higher than the height of the recovery pipe (22) at the trough and lower than the height of the recovery pipe (22) at the peak, wherein the delivery pipe (23) is used to deliver the absorption liquid (3) to the recovery pipe (22), wherein a liquid discharge pipe (4) is arranged at the trough of the recovery pipe (22), and wherein both the delivery pipe (23) and the liquid discharge pipe (4) are provided with control valves (5).

2. A waste gas recovery device for tin stripping water according to claim 1, characterized in that: The absorption liquid (3) is water.

3. A waste gas recovery device for tin stripping water according to claim 1, characterized in that: The air outlet pipe (21) is provided with a pressure regulating valve (211).

4. A waste gas recovery device for tin stripping water according to claim 1, characterized in that: A control component (6) for controlling the communication between the air outlet pipe (21) and the recovery pipe (22) is arranged in the recovery pipe (22).

5. A waste gas recovery device for tin stripping water according to claim 4, characterized in that: The control assembly (6) comprises a control plate (61) rotatably connected to the inner wall of the recovery pipe (22) and a control member (62) forcing the control plate (61) to rotate and abut against the inner wall of the recovery pipe (22), wherein the height of the connection between the control plate (61) and the recovery pipe (22) is higher than the height of the recovery pipe (22) at the trough and lower than the height of the liquid level of the absorption liquid (3).

6. A waste gas recovery device for tin stripping water according to claim 5, characterized in that: The control plate (61) is rotatably penetrated by a rotating rod, the rotating rod is fixedly connected to the inner wall of the recovery pipe (22), the control member (62) is a torsion spring coaxially sleeved on the rotating rod, and the two ends of the torsion spring are respectively fixedly connected to the recovery pipe (22) and the control plate (61).

7. A waste gas recovery device for tin stripping water according to claim 5, characterized in that: The control member (62) is a floating plate arranged on the lower surface of the control plate (61).

8. A waste gas recovery device for tin stripping water according to claim 5, characterized in that: The inner wall of the recovery pipe (22) is fixedly connected with a sealing ring (223) that abuts against the control panel (61).

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