Movable closed sampling device
By designing a mobile closed sampling device, the use of hard tubes and alkali tanks to absorb and treat waste gas, the problem of chlorine overflow during the sampling of the anode gas of the electrolytic cell is solved, and a safe and efficient sampling process is achieved, which improves equipment utilization and reduces costs.
Patent Information
- Application Number
- CN202421638542.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-11
AI Technical Summary
In the prior art, during the sampling process of the anode gas of the electrolytic cell, there is a risk of chlorine overflow at the connection between the sampling device and the electrolytic cell, between the sampling device and the caustic soda exhaust gas pipeline, which leads to a threat to the sampling operator and the environment, and the equipment investment cost is high and the utilization rate is low.
A mobile closed sampling device is designed, including a housing, support wheel, upper cavity and lower cavity. A hard tube sampling feed pipe and a sampling and drainage pipe are used. The waste gas is introduced into the alkali liquid tank through the sampling and drainage pipe for absorption and treatment, avoiding overflow, and can push the device to move to the next electrolytic tank for sampling.
It effectively avoids chlorine spillage, reduces threats to people and the environment, improves equipment utilization, saves costs, and reduces the possibility of leakage through closed sampling.
Smart Images
Figure CN222964967U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sampling devices, and particularly relates to a mobile airtight sampling device. Background Art
[0002] At present, the production of caustic soda in the chlor-alkali industry mainly adopts the ion-exchange membrane method to electrolyze brine to produce caustic soda, and at the same time, two gases, chlorine and hydrogen, are generated.
[0003] In order to strictly control the indicators and ensure the safe and stable operation of the production system, on-site manual sampling is generally used to analyze the purity, impurity components and content of the generated chlorine gas. Chlorine is a highly toxic hazardous chemical and has a fatal destructive effect on humans and the environment.
[0004] In the prior art, the sampling method for chlorine gas in the electrolytic cell is to open the sampling valve and introduce the sample through a hose. Since the hose has elasticity, there is a risk of chlorine gas leakage at the connection between the valve and the hose. After sampling, the waste chlorine gas enters the waste gas absorption system through the medium outlet. It is necessary to weld an opening in the original caustic soda waste gas pipeline entering the waste gas treatment device, increasing the sealing points and the possibility of chlorine gas leakage. The overflow of chlorine gas has a greater impact on the sampling operators and the environment, is not conducive to safe production, and does not meet the environmental protection requirements. Moreover, in the prior art, each electrolytic cell is equipped with a fixed airtight sampling device to conduct airtight sampling of the anode discharge chlorine gas of each electrolytic cell respectively. The investment in equipment and supporting devices is large, the cost is high, and the equipment utilization rate is low. Summary of the Utility Model
[0005] In order to solve the technical problem that there is a risk of chlorine gas overflow at the connections between the sampling device and the electrolytic cell and between the sampling device and the caustic soda waste gas pipeline during the sampling process of the anode gas of the electrolytic cell in the prior art, the utility model provides a mobile airtight sampling device.
[0006] To achieve the above object, the technical solution adopted by the utility model is as follows:
[0007] A mobile airtight sampling device includes a housing. Support wheels are connected to the bottom of the housing. An upper cavity and a lower cavity are provided inside the housing. The lower cavity is located below the upper cavity. Openings are provided on the same side of the upper cavity and the lower cavity. An upper door plate is installed in the opening of the upper cavity, and a lower door plate is installed in the opening of the lower cavity. A sampling bottle is installed in the upper cavity, and an alkali solution tank is installed in the lower cavity. A sampling flange is installed on the outside of the housing. The sampling flange is communicated with one end of a sampling feed pipe. The other end of the sampling feed pipe extends into the upper cavity and is communicated with the inlet of the sampling bottle. An inlet valve is installed on the sampling feed pipe. The outlet of the sampling bottle is communicated with one end of a sampling sewage discharge pipe. The other end of the sampling sewage discharge pipe extends into the alkali solution tank in the lower cavity. A sewage discharge valve is installed on the sampling sewage discharge pipe. A manual pump is installed on the sampling feed pipe between the inlet valve and the sampling bottle or on the sampling sewage discharge pipe between the sampling bottle and the sewage discharge valve. Valves are provided at both the inlet and outlet of the sampling bottle.
[0008] With the above structural scheme, the waste gas can be introduced into the alkali solution tank through the sampling sewage discharge pipe for absorption treatment, avoiding the risk of personnel poisoning, asphyxiation and environmental pollution caused by the waste gas overflow. Moreover, after sampling one electrolytic cell, the housing can be pushed to the next electrolytic cell, and a new sampling bottle can be replaced for sampling, improving the utilization rate of the equipment and saving costs. In addition, valves and flanges are provided on the electrolytic cell. The flange of the electrolytic cell is docked with the sampling flange, and the sampling flange is directly connected to the sampling feed pipe, replacing the traditional hose connection and being not easy to leak.
[0009] As a preferred implementation mode of a mobile airtight sampling device, a discharge flange is further provided on the side of the housing where the sampling flange is provided. A discharge pipe extends from the sampling sewage discharge pipe between the sewage discharge valve and the sampling bottle. The other end of the discharge pipe is communicated with the discharge flange. A discharge valve is installed on the discharge pipe.
[0010] With the above structural scheme, the original discharge pipe is retained for emergencies.
[0011] As a preferred implementation mode of a mobile airtight sampling device, an emergency sampling pipe extends from the sampling feed pipe between the inlet valve and the sampling bottle. An emergency sampling valve is installed on the emergency sampling pipe.
[0012] With the above structural scheme, when it is too late to sample with the sampling bottle and emergency sampling is required, after connecting the sampling flange to the anode gas discharge pipe of the electrolytic cell, connect the sampling feed pipe to the emergency sampling container, keep the valves at the inlet and outlet of the sampling bottle and the sewage discharge valve on the sampling sewage discharge pipe closed, open the inlet valve, manual pump and emergency sampling valve on the sampling feed pipe, and pump the gas out through the emergency sampling pipe into the emergency sampling container.
[0013] As a preferred implementation mode of a mobile airtight sampling device, the emergency sampling pipe and the emergency sampling valve are located in the upper cavity.
[0014] With the above structural solution, there is no need to bend down during emergency sampling, which is convenient for emergency sampling.
[0015] As a preferred implementation of a mobile closed sampling device, a pipe protection frame is provided inside the upper cavity. The sampling feed pipe and the sampling sewage discharge pipe are both installed on one side of the pipe protection frame facing the inside of the upper cavity, and the sampling bottle, the inlet valve and the sewage discharge valve are all installed on one side of the pipe protection frame facing the upper door panel.
[0016] With the above structural solution, the pipe protection frame plays a supporting role, and the sampling bottle, the inlet valve and the sewage discharge valve are all installed on one side of the pipe protection frame facing the upper door panel, which is convenient for operation.
[0017] As a preferred implementation of a mobile closed sampling device, the manual pump is installed on the outer wall of the housing.
[0018] With the above structural solution, it is convenient to manually open and close the manual pump.
[0019] As a preferred implementation of a mobile closed sampling device, a handrail is installed on one side of the housing exterior opposite to the side wall where the sampling flange is located.
[0020] With the above structural solution, it is convenient to push and support the housing.
[0021] As a preferred implementation of a mobile closed sampling device, the upper door panel and the housing, and the lower door panel and the housing are all rotatably connected by hinges.
[0022] With the above structural solution, the structure is simple and the cost is relatively low.
[0023] As a preferred implementation of a mobile closed sampling device, door handles are installed on the outer sides of the upper door panel and the lower door panel.
[0024] With the above structural solution, it is convenient to open and close the upper door panel and the lower door panel.
[0025] As a preferred implementation of a mobile closed sampling device, two or three or four parallel support wheels are provided at the bottom of the housing.
[0026] The beneficial effects of the present utility model include:
[0027] In this application, the waste gas can be introduced into the lye tank through the sampling sewage discharge pipe for absorption treatment, avoiding the risk of personnel poisoning and asphyxiation and environmental pollution caused by waste gas overflow. Moreover, after sampling at one electrolytic cell is completed, the housing can be pushed to the next electrolytic cell, and a new sampling bottle can be replaced for sampling, improving the utilization rate of the equipment and saving costs. Description of the Drawings
[0028] To more clearly illustrate the technical solution of the present utility model, the accompanying drawings required for description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.
[0029] Figure 1 It is a schematic structural diagram of a mobile airtight sampling device in the specific embodiment of the present utility model;
[0030] Figure 2 It is a schematic internal structure diagram of a mobile airtight sampling device in the specific embodiment of the present utility model;
[0031] Figure 3 It is a simplified schematic diagram of the pipeline structure of a mobile airtight sampling device in the specific embodiment of the present utility model.
[0032] List of components and reference numerals:
[0033] 1. Housing; 2. Support wheel; 3. Upper cavity; 4. Lower cavity; 5. Upper door panel; 6. Lower door panel; 7. Hinge; 8. Door handle; 9. Sampling bottle; 10. Alkaline solution tank; 11. Sampling flange; 12. Sampling feed pipe; 13. Inlet valve; 14. Sampling sewage pipe; 15. Sewage valve; 16. Manual pump; 17. Emergency sampling pipe; 18. Emergency sampling valve; 19. Discharge flange; 20. Discharge pipe; 21. Discharge valve; 22. Handrail; 23. Pipeline protection rack. Specific embodiments
[0034] To make the purpose, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in this specific embodiment. Obviously, the embodiments described below are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.
[0035] Referring to Figures 1-3 , this embodiment provides a mobile airtight sampling device, including a housing 1. Two parallel support wheels 2 are connected to the bottom of the housing 1. An upper cavity 3 and a lower cavity 4 are provided inside the housing 1. The lower cavity 4 is located below the upper cavity 3. Openings are provided on the same side of the upper cavity 3 and the lower cavity 4. An upper door panel 5 is installed in the opening of the upper cavity 3, and a lower door panel 6 is installed in the opening of the lower cavity 4. The upper door panel 5 and the housing 1, and the lower door panel 6 and the housing 1 are rotatably connected through hinges 7. Door handles 8 are installed on the outer sides of the upper door panel 5 and the lower door panel 6.
[0036] A sampling bottle 9 is installed in the upper cavity 3. Valves are provided at both the inlet and outlet of the sampling bottle 9. An alkali solution tank 10 is installed in the lower cavity 4. A sampling flange 11 is installed on the outer side of the housing 1. The sampling flange 11 is communicated with one end of a sampling feed pipe 12. The sampling feed pipe 12 is a rigid pipe. The other end of the sampling feed pipe 12 extends into the upper cavity 3 and is communicated with the inlet of the sampling bottle 9. An inlet valve 13 is installed on the sampling feed pipe 12. The outlet of the sampling bottle 9 is communicated with one end of a sampling sewage discharge pipe 14. The other end of the sampling sewage discharge pipe 14 extends into the alkali solution tank 10 in the lower cavity 4. A sewage discharge valve 15 is installed on the sampling sewage discharge pipe 14. A manual pump 16 is installed on the sampling feed pipe 12 between the inlet valve 13 and the sampling bottle 9. The manual pump 16 is installed on the outer wall of the housing 1. An emergency sampling pipe 17 extends out of the sampling feed pipe 12 between the inlet valve 13 and the sampling bottle 9. An emergency sampling valve 18 is installed on the emergency sampling pipe 17. The emergency sampling pipe 17 and the emergency sampling valve 18 are located in the upper cavity 3.
[0037] On the side of the housing 1 where the sampling flange 11 is provided, a discharge flange 19 is also provided. A discharge pipe 20 extends out of the sampling sewage discharge pipe 14 between the sewage discharge valve 15 and the sampling bottle 9. The other end of the discharge pipe 20 is communicated with the discharge flange 19. A discharge valve 21 is installed on the discharge pipe 20. The original discharge method is retained for emergencies.
[0038] A handrail 22 is installed on the outer side of the housing 1 opposite to the side wall where the sampling flange 11 is located. A pipe protection rack 23 is provided in the upper cavity 3. The sampling feed pipe 12 and the sampling sewage discharge pipe 14 are both installed on the side of the pipe protection rack 23 facing the inside of the upper cavity 3. The sampling bottle 9, the inlet valve 13 and the sewage discharge valve 15 are all installed on the side of the pipe protection rack 23 facing the upper door panel 5.
[0039] The working principle of this embodiment is as follows:
[0040] When sampling is required, hold the handrail 22 and push the housing 1 so that the housing 1 moves to the designated position under the action of the support wheels 2. Then connect the sampling flange 11 to the anode gas discharge pipe of the electrolytic cell. Then open the inlet valve 13 on the sampling feed pipe 12, open the drain valve 15 on the sampling drain pipe 14, open the valves at the inlet and outlet of the sampling bottle 9, close the discharge valve 21 on the discharge pipe 20, and open the manual pump 16. Under the action of the manual pump 16, the gas is pumped into the sampling bottle 9 and retained in the sampling bottle 9. After the sampling bottle 9 is full, the excess gas will enter the lye tank 10 through the sampling drain pipe 14 for absorption treatment, avoiding the risk of personnel poisoning, asphyxiation and environmental pollution caused by waste gas overflow. Close the inlet valve 13, the manual pump 16 and the valves at the inlet and outlet of the sampling bottle 9, remove the sampling bottle 9, and send the sampling bottle 9 to the laboratory for analysis. The chlorine gas in the residual waste gas in the sampling drain pipe 14 will slowly be introduced into the lye tank 10. Thus, one sampling is completed, and the housing 1 can be pushed to the next electrolytic cell, and the above operations can be repeated for sampling.
[0041] When there is no time to sample with the sampling bottle 9 and emergency sampling is required, after connecting the sampling flange 11 to the anode gas discharge pipe of the electrolytic cell, connect the sampling feed pipe 12 to the emergency sampling container, keep the valves at the inlet and outlet of the sampling bottle 9 and the drain valve 15 on the sampling drain pipe 14 closed, open the inlet valve 13, the manual pump 16 and the emergency sampling valve 18 on the sampling feed pipe 12, and pump the gas out to the emergency sampling container through the emergency sampling pipe 17.
[0042] In this embodiment, three or four parallel support wheels 2 can also be provided at the bottom of the housing 1, and the housing 1 can be stably placed on the ground, and there is no need to lean the housing 1 against the wall or hold it by hand during sampling.
[0043] In this embodiment, the manual pump 16 can be used to pump the medium into the sampling bottle 9. The manual pump 16 can also be installed on the sampling drain pipe 14 between the sampling bottle 9 and the drain valve 15. After removing the sampling bottle 9, if the manual pump 16 continues to work, the residual waste gas in the sampling drain pipe 14 can be quickly pumped into the lye tank 10 for absorption treatment without waiting, further avoiding the risk of personnel poisoning, asphyxiation and environmental pollution caused by waste gas overflow.
[0044] In order to enable the residual waste gas in the sampling and sewage discharge pipe 14 to quickly enter the lye tank 10 for absorption treatment, on the basis that the manual pump 16 is installed on the sampling feed pipe 12 between the inlet valve 13 and the sampling bottle 9, a sewage pump can be installed on the sampling and sewage discharge pipe 14 to quickly pump the residual waste gas in the sampling and sewage discharge pipe 14 into the lye tank 10 for absorption treatment when the valves at the inlet and outlet of the sampling bottle 9 are closed. At the same time, a pressure display meter can also be installed on the sampling and sewage discharge pipe 14 to display the pressure in the sampling and sewage discharge pipe 14, judge whether the waste gas in the sampling and sewage discharge pipe 14 is completely discharged, and avoid the formation of a large negative pressure in the sampling and sewage discharge pipe 14; or a one-way valve communicating with the atmosphere can be provided on the sampling and sewage discharge pipe 14. The one-way valve only allows gas to enter the sampling and sewage discharge pipe 14 and does not allow gas to be discharged, thereby avoiding the formation of a large negative pressure in the sampling and sewage discharge pipe 14.
[0045] In this embodiment, those skilled in the art should understand that the structure of the sampling bottle 9 is existing, and the sampling bottle 9 can be disassembled for convenient analysis.
[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A mobile closed sampling device, comprising a housing (1), characterized in that: The bottom of the shell (1) is connected to a supporting wheel (2), an upper cavity (3) and a lower cavity (4) are provided in the shell (1), the lower cavity (4) is located below the upper cavity (3), the upper cavity (3) and the lower cavity (4) are both provided with openings on the same side, an upper door plate (5) is installed in the opening of the upper cavity (3), and a lower door plate (6) is installed in the opening of the lower cavity (4); a sampling bottle (9) is installed in the upper cavity (3), an alkali liquid box (10) is installed in the lower cavity (4), a sampling flange (11) is installed on the outside of the shell (1), the sampling flange (11) is connected to one end of a sampling feed pipe (12), and the other end of the sampling feed pipe (12) is connected to the sampling feed pipe (12). One end of the sampling feed pipe (12) extends into the upper cavity (3) and is connected to the inlet of the sampling bottle (9); an inlet valve (13) is installed on the sampling feed pipe (12); the outlet of the sampling bottle (9) is connected to one end of a sampling sewage discharge pipe (14); the other end of the sampling sewage discharge pipe (14) extends into the alkali liquid tank (10) in the lower cavity (4); a sewage discharge valve (15) is installed on the sampling sewage discharge pipe (14); a manual pump (16) is installed on the sampling feed pipe (12) between the inlet valve (13) and the sampling bottle (9) or on the sampling sewage discharge pipe (14) between the sampling bottle (9) and the sewage discharge valve (15); valves are provided at the inlet and outlet of the sampling bottle (9).
2. A mobile closed sampling device according to claim 1, characterized in that: The housing (1) is provided with a discharge flange (19) on one side of the sampling flange (11). A discharge pipe (20) extends from the sampling and sewage discharge pipe (14) between the sewage discharge valve (15) and the sampling bottle (9). The other end of the discharge pipe (20) is connected to the discharge flange (19). A discharge valve (21) is installed on the discharge pipe (20).
3. A mobile closed sampling device according to claim 1, characterized in that: An emergency sampling tube (17) extends from the sampling feed tube (12) between the inlet valve (13) and the sampling bottle (9), and an emergency sampling valve (18) is installed on the emergency sampling tube (17).
4. A mobile closed sampling device according to claim 3, characterized in that: The emergency sampling tube (17) and the emergency sampling valve (18) are located in the upper cavity (3).
5. A mobile closed sampling device according to claim 1, characterized in that: A pipe protection frame (23) is provided in the upper cavity (3); a sampling feed pipe (12) and a sampling sewage discharge pipe (14) are both installed on the side of the pipe protection frame (23) facing the interior of the upper cavity (3); and a sampling bottle (9), an inlet valve (13) and a sewage discharge valve (15) are all installed on the side of the pipe protection frame (23) facing the upper door panel (5).
6. A mobile closed sampling device according to claim 1, characterized in that: The manual pump (16) is mounted on the outer wall of the housing (1).
7. A mobile closed sampling device according to claim 1, characterized in that: A handrail (22) is installed on the side of the housing (1) opposite to the side wall where the sampling flange (11) is located.
8. The mobile closed sampling device according to claim 1, characterized in that: The upper door plate (5) and the housing (1), as well as the lower door plate (6) and the housing (1) are all rotatably connected via hinges (7).
9. The mobile closed sampling device according to claim 1, characterized in that: Door handles (8) are installed on the outer sides of the upper door panel (5) and the lower door panel (6).
10. The mobile closed sampling device according to claim 1, characterized in that: The bottom of the housing (1) is provided with two, three or four parallel supporting wheels (2).