Wet chlorine gas analysis device and system

Abstract

The utility model discloses a wet chlorine gas analysis device and system, and belongs to the technical field of wet chlorine gas analysis. Comprising a gas-liquid separator, a vortex cooling dehumidifier connected with the gas-liquid separator, a fine filter connected with the vortex cooling dehumidifier, a membrane filter connected with the fine filter, a chromatographic instrument connected with the membrane filter, and a carrier gas semi-automatic switching assembly connected with the chromatographic instrument, wherein the fine filter and the membrane filter are respectively connected with a three-way switching valve; according to the wet chlorine gas analysis device and system, switching of multiple electrolytic cells is achieved, the safety, quality and efficiency of chlorine gas production are improved, the cost is reduced, and the environment and staff health are protected; potential safety hazards can be found in time by monitoring the content of impurities in chlorine on line, so that preventive measures are taken, and safety production accidents are avoided; and an enterprise can better control pollutant emission, and the risk that workers make contact with harmful gas is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wet chlorine gas analysis, specifically relates to a kind of wet chlorine gas analysis device and system. BACKGROUND

[0002] Chlorine is an important chemical in industrial production, but it is also highly corrosive and potentially dangerous. If the impurity content in chlorine is not detected in a timely manner, there may be potential safety hazards, such as the risk of explosion caused by hydrogen in chlorine. If preventive measures are not taken, safety accidents may occur. Enterprises cannot monitor the discharge of chlorine and its impurities in real time, cannot switch between multiple electrolytic tanks, cannot control pollutant emissions, increase the risk of employees being exposed to harmful gases, and cannot ensure the health of employees. Therefore, a new wet chlorine gas analysis device and system is needed to solve the existing problems. SUMMARY

[0003] The utility model aims to provide a kind of wet chlorine gas analysis device and system to solve the problem of not being able to monitor the impurity content in wet chlorine in real time.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a wet chlorine gas analysis device, comprising:

[0005] A gas-liquid separator connected to the sample inlet, a vortex cold dehumidifier connected to the gas-liquid separator, a fine filter connected to the vortex cold dehumidifier, a membrane filter connected to the fine filter, and a chromatograph connected to the membrane filter.

[0006] The gas-liquid separator is also connected to a liquid collection tank. The sample inlet is the target gas to be detected. A fourth valve is provided between the gas-liquid separator and the sample inlet.

[0007] Preferably, the fine filter F is connected to a first flow regulator, and the first flow regulator is connected to a second discharge port.

[0008] A second flow regulator is provided between the membrane filter and the chromatograph.

[0009] Preferably, the fine filter and the membrane filter are respectively connected to a three-way switch valve, and the three-way switch valve is further connected to a calibration gas cylinder through a calibration port.

[0010] Preferably, the chromatograph is further connected to a carrier gas semi-automatic switching assembly, and the carrier gas semi-automatic switching assembly includes a first carrier gas cylinder and a second carrier gas cylinder.

[0011] Preferably, the vortex cold dehumidifier includes a first vortex cold dehumidifier connected to the gas-liquid separator TF.

[0012] a second vortex cold dehumidifier connected with the first vortex cold dehumidifier.

[0013] Preferably, an air extraction pump is arranged between the first vortex cold dehumidifier and the second vortex cold dehumidifier.

[0014] Preferably, the air extraction pump is further connected with a needle valve.

[0015] Preferably, the gas-liquid separator is further connected with a nitrogen inlet for providing nitrogen, and a first valve is arranged between the nitrogen inlet and the gas-liquid separator to provide nitrogen to purge the whole system.

[0016] Preferably, the gas-liquid separator is further connected with a second valve PV2, and the second valve is connected with a tap water inlet; the tap water inlet provides tap water to clean the gas-liquid separator, for example, once a week.

[0017] Preferably, the gas-liquid separator is further connected with a third valve, and the third valve is connected with an instrument air inlet; an air filter pressure reducing valve is arranged between the third valve and the instrument air inlet; the instrument air inlet provides instrument air to provide power for pneumatic instruments to ensure normal operation.

[0018] Preferably, a fourth valve is arranged between the gas-liquid separator and the sample inlet.

[0019] Preferably, the first vortex cold dehumidifier and the second vortex cold dehumidifier are respectively connected with liquid collecting tanks.

[0020] Preferably, the three liquid collecting tanks are respectively provided with fifth valves, and the three fifth valves are connected with a first discharge port; the first discharge port is connected with a liquid collecting tank.

[0021] Preferably, an exhaust port of the liquid collecting tank is connected with a negative pressure recovery pipeline.

[0022] The utility model further provides a wet chlorine gas analysis system, which comprises a wet chlorine gas analysis device.

[0023] A multi-path switching assembly connected with the wet chlorine gas analysis device.

[0024] The multi-path switching assembly comprises:

[0025] A plurality of valves capable of switching different gas paths to input into the sample inlet; the sample inlet is connected with the gas-liquid separator.

[0026] The technical effects and advantages of the utility model are: the wet chlorine gas analysis device and system can effectively treat the impurity salts and moisture in the wet chlorine gas, can improve the accuracy and service life of the analyzer, realize the switching of multiple electrolytic tanks, improve the safety, quality and efficiency of chlorine gas production, reduce the cost, protect the environment and the health of employees, can discover potential safety hazards in time through online monitoring of the impurity content in the chlorine gas, so that preventive measures are taken to avoid the occurrence of safety production accidents, and are more helpful for enterprises to better control pollutant emissions and reduce the risk of employees contacting harmful gases. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a gas flow chart of the device, in the figure, the double solid line represents the CPVC pipe, the single solid line represents the PTFE pipe, and the dashed line represents the 316L pipe;

[0028] Figure 2 It is a frame schematic diagram of the system;

[0029] Figure 3 It is a front view of the device;

[0030] Figure 4 It is a right view of the device;

[0031] Figure 5 It is a top view of the device.

[0032] In the figure: 11, instrument air inlet; 12, nitrogen inlet; 13, tap water inlet; 14, sample inlet; 15, first discharge port; 16, second discharge port; 20, liquid collecting tank; 30, calibration port; 40, carrier gas semi-automatic switching assembly; 50, explosion-proof air conditioner; 60, first carrier gas bottle; 70, second carrier gas bottle; 80, standard gas bottle; 90, chromatograph. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0034] Embodiment one

[0035] The utility model provides a kind of wet chlorine gas analysis device as shown in Figure 1 In the figure, the double solid line represents the CPVC pipe, the single solid line represents the PTFE pipe, and the dashed line represents the 316L pipe;

[0036] The working principle of the chromatograph 90: the chromatograph 90 is equipped with a thermal conductivity detector TCD for the analysis of gas mixtures in percentage and ppm levels, the thermal conductivity detector TCD is connected with four sensing elements to form a Wheatstone bridge circuit, and the chromatograph 90 is provided with a column oven with independent heating function and a packed column with a separate temperature controller, which can ensure excellent stability, accuracy and repeatability.

[0037] The sample to be detected is switched by the sample inlet 14 and enters the pretreatment system, the pretreatment system separates the liquid through the gas-liquid separator TF, discharges the separated liquid through the liquid collection tank LG, removes the moisture and impurities, and further removes the moisture and filters the sample through the vortex cold dehumidifier, discharges the sample containing water through the liquid collection tank LG, and filters the sample through the fine filter, the membrane filter and the flow regulator, and then enters the chromatograph 90 for analysis;

[0038] The chromatograph 90 is also connected with the carrier gas semi-automatic switching assembly 40, which includes a first carrier gas cylinder 60 and a second carrier gas cylinder 70;

[0039] The fine filter F and the membrane filter MF are respectively connected with the three-way switching valve TWV; the three-way switching valve TWV is also connected with the standard gas cylinder 80 through the calibration port 30;

[0040] The gas-liquid separator TF is also connected with the liquid collection tank LG; the sample inlet 14 is the target gas to be detected; the fourth valve PV4 is arranged between the gas-liquid separator TF and the sample inlet 14;

[0041] The fine filter F is connected with the first flow regulator FL1, and the first flow regulator FL1 is connected with the second discharge port 16;

[0042] The membrane filter MF is provided with the second flow regulator FL2 between the membrane filter MF and the chromatograph 90.

[0043] Specific process: the sample gas is switched by the sample inlet 14 and enters the pretreatment system, and then the sample gas is treated by the pretreatment system to remove water and impurities, and then enters the chromatograph 90;

[0044] 1. Purging: open the first valve PV1, nitrogen enters from the nitrogen inlet 12, and purge the entire pipeline to ensure that there is no impurity in the pipeline;

[0045] 2. Calibration: open the three-way switching valve TWV, the standard gas of the standard gas cylinder 80 enters the chromatograph 90, calibrate and calibrate the chromatograph 90, realize zero point calibration and range calibration;

[0046] 3. Detection: open the fourth valve PV4, the sample gas enters the gas-liquid separator TF, the fifth valve PV5 is opened, the separated liquid is discharged to the liquid collection tank 20 through the liquid collection tank LG; open the third valve PV3, the air filter pressure reducing valve PFV reduces the pressure of the sample after removing water and impurities, and then further removes water and filters through the double vortex cold dehumidifier, the sample containing water is also discharged through the liquid collection tank LG, and the filtered sample enters the chromatograph 90 after passing through the fine filter F, the membrane filter MF and the second flow regulating meter FL2 for analysis, and the detection shows the content of different gases in the sample gas;

[0047] The gas-liquid separator TF is also connected with the second valve PV2, and the second valve PV2 is connected with the tap water inlet 13; the tap water inlet 13 provides tap water to clean the gas-liquid separator TF, for example, once a week;

[0048] The gas-liquid separator TF is also connected with the third valve PV3, and the third valve PV3 is connected with the instrument air inlet 11, and the air filter pressure reducing valve PFV is arranged between the third valve PV3 and the instrument air inlet 11; the instrument air inlet 11 provides instrument air to provide power for the pneumatic instrument to ensure normal operation;

[0049] The double vortex cold dehumidifier comprises: a first vortex cold dehumidifier VC1 connected with the gas-liquid separator TF;

[0050] And a second vortex cold dehumidifier VC2 connected with the first vortex cold dehumidifier VC1.

[0051] The first vortex cold dehumidifier VC and the second vortex cold dehumidifier VC are provided with a gas suction pump DP.

[0052] The gas suction pump DP is also connected with a needle valve NV.

[0053] The first vortex cold dehumidifier VC and the second vortex cold dehumidifier VC are respectively connected with a liquid collection tank LG.

[0054] The three liquid collection tanks LG are respectively provided with a fifth valve PV5, the three fifth valves PV5 are connected with a first discharge port 15, and the first discharge port 15 is connected with a liquid collection tank 20.

[0055] The pretreatment components and pipelines in contact with the sample are made of corrosion-resistant materials such as PFA PTFE CPVC;

[0056] Chlorine gas is generated when the liquid collection tank 20 discharges liquid, and the exhaust port of the liquid collection tank 20 is connected with a negative pressure recovery pipeline;

[0057] As Figure 3 , Figure 4 , Figure 5As shown, the wet chlorine gas analysis device is arranged in the cabinet, the cabinet is a heat preservation analysis cabinet, an explosion-proof air conditioner 50 is arranged outside the cabinet body, the first carrier gas bottle 60, the second carrier gas bottle 70 and the standard gas bottle 80 are all arranged outside the cabinet body, when installed, the distance between the first carrier gas bottle 60, the second carrier gas bottle 70 and the standard gas bottle 80 and the wall is 800mm, the distance between the explosion-proof air conditioner 50 and the wall is 600mm, the distance between the cabinet body and the wall is 600mm, after the cabinet door is opened, the distance between the cabinet door and the wall is 600mm, so that installation and personnel operation space are facilitated.

[0058] Example two

[0059] The utility model further provides a kind of wet chlorine gas analysis system as shown in Figure 2 As shown in a kind of wet chlorine gas analysis system, including wet chlorine gas analysis device, and the multiple-way switching component being connected with wet chlorine gas analysis device, the gas path of electrolytic cell wet chlorine gas is controlled to realize multiple-way switching using PLC to the valve on pipeline, set detection period to control sample gas to enter wet chlorine gas analysis device, reach the purpose of respectively detecting different gas path wet chlorine gas impurity content. With four ways as an example, specific process: when detecting 1 way gas, 2 way, 3 way, 4 way valve that enters analysis cabinet is all closed (i.e. valve b2, c2, d2 are all closed), valve b1, c1, d1 are opened normally and flow into chlorine gas main pipe, valve a1 is closed, valve a2 is opened and enters wet chlorine gas analysis device, output gas composition data, when 1 way gas path detection is completed, close valve a2, open valve a1, ensure that gas path is always in circulation.

[0060] The gas type and impurity index detected by the system are shown in Table 1:

[0061] Table 1 gas type and impurity index

[0062]

[0063]

[0064] The wet chlorine gas analysis device and system can effectively remove impurity salts and moisture from wet chlorine gas, improve the accuracy and service life of the analyzer, realize switching of multiple electrolytic cells, improve the safety, quality and efficiency of chlorine gas production, reduce costs, protect the environment and employee health, detect impurity content in chlorine gas online, discover potential safety hazards in time, take preventive measures and avoid safety accidents, better control pollutant emissions and reduce the risk of employees contacting harmful gases.

[0065] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A wet chlorine gas analysis device, characterized by: Comprising: a gas-liquid separator, a vortex cold dehumidifier connected to the gas-liquid separator, a fine filter connected to the vortex cold dehumidifier, a membrane filter connected to the fine filter, a chromatograph connected to the membrane filter, and a carrier gas semi-automatic switching assembly connected to the chromatograph; wherein the fine filter and the membrane filter are respectively connected to a three-way switching valve, and the three-way switching valve is further connected to a standard gas bottle.

2. A wet chlorine analysis apparatus according to claim 1, characterised in that: The fine filter is further connected to a first flow regulating meter. A second flow regulating meter is arranged between the membrane filter and the chromatograph.

3. A wet chlorine analysis apparatus according to claim 1, characterized in that: The chromatograph is further connected to a carrier gas semi-automatic switching assembly, and the carrier gas semi-automatic switching assembly comprises at least one carrier gas bottle.

4. A wet chlorine analysis apparatus according to claim 1, characterized in that: The vortex cold dehumidifier comprises: a first vortex cold dehumidifier connected to the gas-liquid separator; and 5. A wet chlorine analysis apparatus according to claim 4, characterised in that: a second vortex cold dehumidifier connected to the first vortex cold dehumidifier.

6. A wet chlorine gas analysis device according to any one of claims 1-5, characterized in that: An air extraction pump is arranged between the first vortex cold dehumidifier and the second vortex cold dehumidifier.

7. A wet chlorine gas analysis device according to any one of claims 1-5, characterized in that: The gas-liquid separator is further connected to an instrument air inlet for providing instrument air.

8. A wet chlorine gas analysis device according to any one of claims 1-5, characterized in that: The gas-liquid separator is further connected to a nitrogen inlet for providing nitrogen.

9. A wet chlorine analysis apparatus according to claim 6, characterised in that: The gas-liquid separator is further connected to a tap water inlet for providing tap water.

10. A wet chlorine gas analysis system characterized by: A third valve is arranged between the instrument air inlet and the gas-liquid separator, and an air filtration and pressure reduction valve is arranged between the third valve and the instrument air inlet. Comprising: the wet chlorine gas analysis device of any one of claims 1-9; and a multi-way switching assembly connected to the wet chlorine gas analysis device; wherein the multi-way switching assembly comprises: a plurality of valves capable of switching different gas paths to be input to the gas-liquid separator.

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