Closed sampling device of ionic membrane caustic soda device

Abstract

The utility model relates to the technical field of caustic soda preparation equipment, and provides a closed sampling device of an ionic membrane caustic soda device, which comprises an anolyte sampling tube, a catholyte sampling tube, a first valve, a second valve, a cabinet body and an exhaust fan, one end of the anolyte sampling tube is connected with the electrolytic bath, the other end of the anolyte sampling tube extends into the cabinet body, one end of the catholyte sampling tube is connected with the electrolytic bath, and the other end of the catholyte sampling tube extends into the cabinet body; the first valve is arranged on the anolyte sampling tube, and the second valve is arranged on the catholyte sampling tube; a placing plate for placing a sampling bottle is arranged in the cabinet body; a sampling window capable of being opened and closed is arranged on the cabinet body; and a liquid discharge pipeline is arranged at the bottom of the cabinet body and is connected with the exhaust fan. The direct contact between caustic soda and an operator can be avoided through closed sampling, and the risks of chemical burn and respiratory tract injury are remarkably reduced. Meanwhile, leakage of harmful gas is reduced, the working environment is improved, the morbidity of occupational diseases is reduced, the service life of equipment is prolonged, and the long-term operation cost is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of caustic soda preparation equipment, and more specifically, relates to a closed sampling device for an ion membrane caustic soda device. Background Art

[0002] During the production of ion-exchange membrane caustic soda, regular testing of the anolyte and catholyte is required to ensure stable production and assess product quality. Existing sampling methods involve directly collecting samples from the electrolytic cell using sampling bottles. However, because toxic and hazardous substances such as sodium hydroxide (NaOH) and chlorine (Cl2) are generated during caustic soda production, the highly corrosive NaOH can cause severe skin burns and eye damage when operators are sampling. Furthermore, the pungent chlorine generated by the anolyte is prone to leakage, causing respiratory damage. Utility Model Content

[0003] In view of the shortcomings of the above-mentioned existing sampling methods, the purpose of the embodiments of the present application is to provide a closed sampling device for an ion-exchange membrane caustic soda device, which can directly reduce the risk of contact with hazardous substances, avoid the occurrence of safety accidents, improve the safety of the sampling process, and improve production efficiency.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide a closed sampling device for an ion membrane caustic soda device, comprising: an anolyte sampling tube, a cathode liquid sampling tube, a first valve, a second valve, a cabinet and an exhaust fan;

[0005] One end of the anolyte sampling tube is connected to the electrolytic cell, and the other end extends into the cabinet; one end of the catholyte sampling tube is connected to the electrolytic cell, and the other end extends into the cabinet; the first valve is provided on the anolyte sampling tube, and the second valve is provided on the catholyte sampling tube;

[0006] A placement plate for placing sampling bottles is provided in the cabinet;

[0007] The cabinet is provided with an openable and closable sampling window;

[0008] A drainage pipe is provided at the bottom of the cabinet, and the drainage pipe is connected to the exhaust fan.

[0009] In one embodiment, the placement plate is a multi-well plate.

[0010] In one embodiment, a positioning slot frame is provided on the placement plate.

[0011] In one embodiment, a gas-liquid separator is connected to the liquid discharge pipe, a gas outlet end of the gas-liquid separator is connected to the exhaust fan, and a gas outlet end of the exhaust fan is connected to a chlorine gas removal tower.

[0012] In one embodiment, the liquid discharge pipe is inclined, and a neutralization tank is connected to the lower end of the liquid discharge pipe.

[0013] In one embodiment, the cabinet is a transparent cabinet.

[0014] In one embodiment, both the first valve and the second valve are ball valves.

[0015] In one embodiment, the sampling window is circular or oval.

[0016] The beneficial effects of the closed sampling device for the ion-exchange membrane caustic soda device provided by this application are as follows: Compared with the prior art, the closed sampling of the closed sampling device for the ion-exchange membrane caustic soda device of this application can avoid the direct contact between caustic soda and operators, significantly reducing the risks of chemical burns and respiratory injuries. At the same time, it reduces the leakage of harmful gases, improves the working environment, reduces the incidence of occupational diseases, extends the service life of equipment, and reduces long-term operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a simplified structural schematic diagram of the closed sampling device for the ion-exchange membrane caustic soda device provided by the embodiment of this application.

[0019] Among them, the reference numerals in the figure are as follows:

[0020] 1. Anolyte sampling pipe; 2. Catholyte sampling pipe; 3. First valve; 4. Second valve; 5. Cabinet; 6. Exhaust fan; 7. Placing plate; 8. Sampling window; 9. Positioning groove rack; 10. Gas-liquid separator; 11. Chlorine decontamination tower; 12. Neutralization tank; 13. Sampling bottle; 14. Liquid discharge pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further describes this application in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0025] As Figure 1 shown, a closed sampling device for an ion-exchange membrane caustic soda device provided by an embodiment of the present application will now be described. The closed sampling device includes: an anolyte sampling pipe 1, a catholyte sampling pipe 2, a first valve 3, a second valve 4, a cabinet 5, and a suction fan 6. The cabinet 5 is disposed on a bracket; one end of the anolyte sampling pipe 1 is connected to an electrolytic cell, and the other end extends into the cabinet 5; one end of the catholyte sampling pipe 2 is connected to the electrolytic cell, and the other end extends into the cabinet 5; the liquid outlets of the anolyte sampling pipe 1 and the catholyte sampling pipe 2 are arranged downward.

[0026] Among them, the first valve 3 is disposed on the anolyte sampling pipe 1, and the second valve 4 is disposed on the catholyte sampling pipe 2; both the first valve 3 and the second valve 4 are located outside the cabinet 5, and both the first valve 3 and the second valve 4 are ball valves, which can control the sampling flow rate.

[0027] In this embodiment, a placement plate 7 for placing a sampling bottle 13 is provided inside the cabinet 5; the sampling bottle 13 is placed directly below the liquid outlet; a sample-taking window 8 that can be opened and closed is provided on the cabinet 5; the sample-taking window 8 is used for taking and placing the sampling bottle 13, and during the sampling process, the sample-taking window 8 is closed to prevent chlorine gas from escaping.

[0028] In this embodiment, a liquid discharge pipeline 14 is provided at the bottom of the cabinet body 5, and the liquid discharge pipeline 14 is connected to the exhaust fan 6; the liquid discharge pipeline 14 is used to discharge the excess sample liquid and at the same time extract chlorine gas. The exhaust fan 6 is used to create a negative pressure inside the cabinet body 5, and extract the volatilized chlorine gas from the bottom to prevent the chlorine gas from escaping and causing harm to the staff when the sampling window 8 is opened.

[0029] In this embodiment, the placement plate 7 is a perforated plate, which facilitates the excess sample liquid to flow into the liquid discharge pipeline 14 below during sampling.

[0030] In this embodiment, a positioning groove rack 9 is provided on the placement plate 7. The positioning groove rack 9 is used to position and stabilize the sampling bottle 13 to prevent the sampling bottle 13 from tipping over. The sampling bottle 13 is a cylindrical bottle, and the positioning groove rack 9 is provided with a circular hole for the sampling bottle 13 to be inserted.

[0031] In this embodiment, a gas-liquid separator 10 is connected to the liquid discharge pipeline 14 for separating gas and liquid; the gas outlet end of the gas-liquid separator 10 is connected to the exhaust fan 6, and the exhaust outlet end of the exhaust fan 6 is connected to a chlorine gas decontamination tower 11 for purifying the chlorine gas to prevent air pollution. The liquid discharge pipeline 14 is inclined, and the lower end of the liquid discharge pipeline 14 is connected to a neutralization tank 12 for neutralizing the sample liquid. The upper end of the liquid discharge pipeline 14 is a closed end, and an air inlet is provided at the top of the cabinet body 5 to form an air flow flowing from top to bottom inside the cabinet body 5 to carry away the chlorine gas.

[0032] In this embodiment, the cabinet body 5 is a transparent cabinet body 5, which is convenient for the staff to observe the sampling situation. Specifically, it is made of polyvinyl chloride (PVC for short) material. In this embodiment, the sampling window 8 is circular or oval.

[0033] During use, the operator opens the sampling window 8, places the dedicated anode and cathode liquid sampling bottle 13 in the positioning groove rack 9, closes the sampling window 8, slightly opens the first valve 3 and the second valve 4, and after cleaning the sampling bottle 13 for a period of time, the operator monitors the sampling situation through the transparent cabinet body 5, fills in a certain amount of sampling liquid. After sampling, the operator opens the sampling window 8, seals the sampling bottle 13, then takes away the sample to be tested, and closes the window. During the sampling process, the toxic gas chlorine gas entrained in the anode liquid can be recovered by the exhaust fan 6 of the gas-liquid separator 10 and processed in the chlorine gas decontamination tower 11. In addition, the liquid overflowed during the cleaning process flows through the perforated plate into the liquid discharge pipeline 14 and is finally discharged into the neutralization tank 12 for treatment.

[0034] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A closed sampling device for an ion-exchange membrane caustic soda plant, characterized in that, Including: Anolyte sampling tube (1), catholyte sampling tube (2), first valve (3), second valve (4), cabinet (5) and exhaust fan (6); One end of the anolyte sampling tube (1) is connected to the electrolytic cell, and the other end extends into the cabinet (5). One end of the catholyte sampling tube (2) is connected to the electrolytic cell, and the other end extends into the cabinet (5). The first valve (3) is arranged on the anolyte sampling tube (1), and the second valve (4) is arranged on the catholyte sampling tube (2); A placement plate (7) for placing the sampling bottle (13) is arranged in the cabinet (5); A sample-taking window (8) that can be opened and closed is arranged on the cabinet (5); A drain pipe (14) is arranged at the bottom of the cabinet (5), and the drain pipe (14) is connected to the exhaust fan (6).

2. The closed sampling device of the ion-exchange membrane caustic soda device according to claim 1, wherein: The placement plate (7) is a perforated plate.

3. The closed sampling device for an ion-exchange membrane caustic soda device according to claim 2, characterized in that: A positioning groove rack (9) is arranged on the placement plate (7).

4. The closed sampling device for an ion-exchange membrane caustic soda plant according to claim 1, characterized in that: A gas-liquid separator (10) is connected to the drain pipe (14). The gas outlet end of the gas-liquid separator (10) is connected to the exhaust fan (6), and the exhaust fan (6) is connected to a chlorine decontamination tower (11).

5. The closed sampling device for an ion-exchange membrane caustic soda plant as claimed in claim 4, wherein: The drain pipe (14) is inclined, and a neutralization tank (12) is connected to the lower end of the drain pipe (14).

6. The closed sampling device for an ion-exchange membrane caustic soda device according to any one of claims 1-5, characterized in that: The cabinet (5) is a transparent cabinet.

7. The closed sampling device for the ion-exchange membrane caustic soda device according to claim 6, characterized in that: Both the first valve (3) and the second valve (4) are ball valves.

8. The closed sampling device of the ion-exchange membrane caustic soda device according to claim 6, characterized in that: The sample-taking window (8) is circular or oval.

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