Online chlorine gas sampling device

Abstract

The utility model discloses an on-line chlorine gas sampling device and relates to the field of fine chemical engineering. The chlorine gas online sampling device comprises a gas storage tank; the sampling pipe is fixedly communicated with the upper end of the gas storage tank; the valve I is mounted on the sampling tube; the purging pipe is fixedly communicated with one side of the sampling pipe and is positioned on the upper side of the valve I; the gas storage tank, the sampling pipe, the first valve, the purging pipe, the second valve and other components are used in cooperation, after a certain amount of chlorine is sampled into the gas storage tank, nitrogen can be purged into the sampling pipe through the purging pipe, part of residual chlorine in the sampling pipe is purged back into the chlorine storage tank, and it is avoided that after the sampling pipe is separated from the chlorine storage tank, the sampling pipe is separated from the chlorine storage tank, and the sampling pipe is separated from the chlorine storage tank. The chlorine remaining in the sampling pipe drifts into the air, so that sampling personnel are hurt, and the safety of the sampling device is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fine chemical industry, and specifically relates to an online chlorine gas sampling device. Background Art

[0002] In the analysis projects of the chemical industry, it is often necessary to sample and analyze some gases at normal temperature and pressure, such as chlorine. Since chlorine is a toxic gas with a yellow-green color and a strong irritating odor, it can cause people to sneeze, cough, shed tears, suffocate and other symptoms. Therefore, when sampling chlorine, it is necessary to strictly control the sealing of the gas pipeline to avoid leakage.

[0003] The existing device for sampling chlorine can ensure the airtightness between the chlorine storage tank, the gas pipeline and the gas storage tank when sampling chlorine. However, when the sampling of chlorine is completed and the gas pipeline is separated from the chlorine storage tank, since the connection port between the gas pipeline and the chlorine storage tank is in an open state, a small amount of chlorine remaining in the gas pipeline will float out of the gas pipeline after the gas pipeline and the chlorine storage tank are separated, causing harm to the sampling personnel. In view of this, the present utility model is specially proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a chlorine gas online sampling device which can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: an online chlorine sampling device, comprising: a gas storage tank; a sampling tube, fixedly connected to the upper end of the gas storage tank; a valve one, installed on the sampling tube; a purge tube, fixedly connected to one side of the sampling tube and located on the upper side of the valve one; a valve two, installed on the purge tube.

[0006] In order to improve the air tightness of the gas storage tank, further, two valves are installed on the sampling tube.

[0007] In order to improve the applicability of the device, it further includes a connecting hose, both ends of which are equipped with movable joints, and the two ends of the connecting hose are respectively connected to the sampling tube and the outlet pipe of the chlorine storage tank through the movable joints.

[0008] In order to ensure the concentration of chlorine, further, a suction pipe is fixedly connected to the bottom of the gas storage tank, and a valve three is installed on the suction pipe.

[0009] In order to facilitate the detection of the air pressure value in the gas storage tank, further, a negative pressure gauge is installed on the gas storage tank, and the detection end of the negative pressure gauge extends into the gas storage tank.

[0010] In order to ensure the stability of the chlorine content, further, a polytetrafluoroethylene layer is provided on the inner walls of the gas storage tank, the sampling tube, the purge tube, the suction tube, and the valve plate surfaces of valve one, valve two, and valve three.

[0011] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model uses the gas storage tank, sampling tube, valve one, purge tube and valve two and other components in coordination. After a certain amount of chlorine is sampled into the gas storage tank, nitrogen can be purged into the sampling tube through the purge tube, and part of the chlorine remaining in the sampling tube can be purged back into the chlorine storage tank, so as to avoid the chlorine remaining in the sampling tube from being dispersed into the air after the sampling tube is separated from the chlorine storage tank, causing harm to the sampling personnel, thereby effectively improving the safety of the sampling device.

[0012] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In the attached picture:

[0014] Figure 1 A schematic diagram of the structure of a chlorine gas online sampling device proposed in the utility model Figure 1 ;

[0015] Figure 2 A schematic diagram of the structure of a chlorine gas online sampling device proposed in the utility model Figure 2 ;

[0016] Figure 3 The utility model provides a partial cross-sectional structural schematic diagram of a chlorine online sampling device.

[0017] In the figure: 1. gas storage tank; 101. negative pressure gauge; 102. polytetrafluoroethylene layer; 2. sampling tube; 201. valve one; 202. purge tube; 203. valve two; 204. connecting hose; 205. movable joint; 3. suction tube; 301. valve three. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0019] Embodiment 1:

[0020] Reference Figure 1-Figure 3A chlorine online sampling device comprises: a gas storage tank 1; a sampling tube 2, fixedly connected to the upper end of the gas storage tank 1; a valve 201, installed on the sampling tube 2; a purge tube 202, fixedly connected to one side of the sampling tube 2 and located on the upper side of the valve 201; a valve 203, installed on the purge tube 202.

[0021] When it is necessary to sample and test the chlorine, first seal and connect the sampling tube 2 with the outlet pipe of the chlorine storage tank, connect the air inlet of the purge tube 202 with the outlet of the external nitrogen delivery equipment, then respectively open the valve at the outlet of the chlorine storage tank and the valve on the sampling tube 2, and ensure that the valve 203 is in the closed state, and then sampling can be carried out, and the chlorine is sampled into the gas storage tank 1. When the sampling is completed, the valve 1 201 can be closed, the valve 2 203 can be opened, and the external nitrogen delivery equipment can be started, and then the external nitrogen delivery equipment will blow nitrogen into the sampling tube 2 through the purge tube 202, so that part of the chlorine retained in the sampling tube 2 can be purged and blown back into the chlorine storage tank. The chemical properties of nitrogen are relatively stable, and it can only react with chlorine at temperatures above 1200 degrees. Therefore, it will not react with chlorine in the chlorine storage tank. In addition, since the density of nitrogen is less than that of chlorine, when part of the nitrogen enters the chlorine storage tank, it will float to the top of the chlorine storage tank. In actual use, it is only necessary to set the outlet pipe at the bottom of the chlorine storage tank. When the chlorine is recovered, the valve 203 and the valve on the outlet pipe of the chlorine storage tank can be closed, and the sampling tube 2 can be separated from the outlet pipe of the chlorine storage tank, thereby completing the leakage sampling of chlorine. Finally, the staff will send the gas tank 1 storing chlorine to the detection unit, and then the sampled chlorine can be subjected to subsequent detection operations.

[0022] Embodiment 2:

[0023] Reference Figure 1-Figure 3 , a chlorine online sampling device, which is basically the same as Example 1, and further: two valves 201 are installed on the sampling tube 2. By setting two valves 201, not only can the air tightness of the gas storage tank 1 be further improved, but when one of the valves 201 is damaged, the other valve 201 can also ensure the air tightness of the gas storage tank 1.

[0024] It also includes a connecting hose 204, both ends of which are installed with movable joints 205. The two ends of the connecting hose 204 are connected to the sampling tube 2 and the outlet pipe of the chlorine storage tank through the movable joints 205 respectively. Through the setting of the connecting hose 204, it can be suitable for outlet pipes at different heights on the chlorine storage tank, which effectively improves the applicability of the sampling device.

[0025] Embodiment 3:

[0026] Reference Figure 1-Figure 3 , a chlorine online sampling device, which is basically the same as Example 2, and further: a suction pipe 3 is fixedly connected to the bottom of the gas storage tank 1, and a valve three 301 is installed on the suction pipe 3. When it is necessary to sample the chlorine online, the suction pipe 3 is first connected to the external negative pressure pump, and then the valve three 301 is opened, and then the negative pressure pump can be started to discharge the air in the gas storage tank 1, so that the gas storage tank 1 is in a negative pressure state, which not only facilitates the chlorine to quickly enter the gas storage tank 1 and improve the sampling rate, but also reduces the influence of some substances in the air on the chlorine itself and the concentration of chlorine, effectively improving the subsequent detection accuracy of chlorine, and by arranging the suction pipe 3 at the bottom of the gas storage tank 1, since the density of chlorine is greater than the density of air, the chlorine will be deposited at the bottom of the gas storage tank 1, and the air will be squeezed to the top by the chlorine, when the sampled chlorine needs to be taken out of the gas storage tank 1 for detection, the valve three 301 can be opened to discharge the chlorine, effectively ensuring the concentration of the taken out chlorine.

[0027] A negative pressure gauge 101 is installed on the gas tank 1, and the detection end of the negative pressure gauge 101 extends into the gas tank 1. Through the setting of the negative pressure gauge 101, when the negative pressure in the gas tank 1 is drawn, the negative pressure value in the gas tank 1 can be monitored in real time through the negative pressure gauge 101, and when chlorine is sampled into the gas tank 1, a quantitative amount of chlorine can be delivered to the gas tank 1 according to the value displayed by the negative pressure gauge 101, thereby improving the sampling accuracy.

[0028] A polytetrafluoroethylene layer 102 is provided on the inner walls of the gas storage tank 1, the sampling tube 2, the purge tube 202, the suction tube 3, and the valve plate surfaces of the valve 1 201, the valve 2 203, and the valve 3 301. Since the existing sampling devices are generally made of stainless steel, but stainless steel has adsorption properties for chlorine, it will cause the concentration of chlorine to change. By providing the polytetrafluoroethylene layer 102, the adsorption of chlorine by conventional stainless steel materials can be avoided, thereby ensuring the stability of the chlorine content and thus ensuring the accuracy of subsequent chlorine analysis.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention.

Claims

1. A chlorine gas online sampling device, characterized in that: include: Gas tank (1); A sampling tube (2) is fixedly connected to the upper end of the gas storage tank (1); Valve 1 (201), installed on the sampling tube (2); A purge pipe (202) is fixedly connected to one side of the sampling pipe (2) and is located on the upper side of the valve 1 (201); Valve 2 (203) is installed on the purge pipe (202).

2. A chlorine gas online sampling device according to claim 1, characterized in that: Two valves (201) are installed on the sampling tube (2).

3. A chlorine gas online sampling device according to claim 1, characterized in that: It also comprises a connecting hose (204), both ends of which are provided with movable joints (205), and the two ends of the connecting hose (204) are respectively connected to the sampling tube (2) and the gas outlet pipe of the chlorine gas storage tank through the movable joints (205).

4. A chlorine gas online sampling device according to claim 1, characterized in that: The bottom of the gas storage tank (1) is fixedly connected to a suction pipe (3), and a valve three (301) is installed on the suction pipe (3).

5. A chlorine gas online sampling device according to claim 4, characterized in that: A negative pressure gauge (101) is installed on the gas storage tank (1), and a detection end of the negative pressure gauge (101) extends into the gas storage tank (1).

6. A chlorine gas online sampling device according to claim 4, characterized in that: A polytetrafluoroethylene layer (102) is provided on the inner walls of the gas storage tank (1), the sampling tube (2), the purge tube (202), the suction tube (3), and the surfaces of the valve plates of valve one (201), valve two (203), and valve three (301).

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