Water electrolysis hydrogen production sampling analysis device and water electrolysis hydrogen production equipment

Abstract

The utility model belongs to the technical field of water electrolysis hydrogen production, and particularly relates to a water electrolysis hydrogen production sampling analysis device and water electrolysis hydrogen production equipment. The inlet end of a first pressure reducing valve is connected with an oxygen side outlet of an electrolytic bath through a pipeline, and a gas-water separator is arranged on the pipeline, connected with the oxygen side outlet of the electrolytic bath, of the first pressure reducing valve; the outlet end of the pressure reducing valve I is connected with the inlet end of a condensation separator through a pipeline, and a liquid outlet of the gas-water separator and a liquid outlet of the condensation separator are connected with an alkali liquor recovery device through pipelines; the inlet end of the second pressure reducing valve is connected with the outlet end of the condensation separator through a pipeline, the outlet end of the second pressure reducing valve is connected with the inlet end of the dryer through a pipeline, the outlet end of the dryer is connected with the analyzer through a pipeline, a first adjusting valve is arranged at the inlet end of the dryer, and a discharge branch pipe is further arranged on the pipeline where the second pressure reducing valve is connected with the dryer. The waste of alkali liquor can be reduced, the hysteresis of the detection result of the analyzer is reduced, and the hydrogen content in oxygen can be detected more quickly, stably and accurately.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electrolytic water hydrogen production, specifically relates to a kind of electrolytic water hydrogen production sampling analysis device and electrolytic water hydrogen production equipment. BACKGROUND

[0002] In the large-scale project of alkaline electrolytic water hydrogen production, in order to improve economic benefits, multiple electrolytic cells are usually connected in parallel, and a large gas-liquid separation device is shared. In order to monitor the gas purity generated by each electrolytic cell and ensure the safe operation of the electrolytic cell, the hydrogen concentration in oxygen needs to be detected. Currently, an analyzer is installed at the oxygen side outlet of each electrolytic cell, and the gas is sampled and detected along the oxygen side outlet. However, the gas usually carries a certain amount of alkali liquor, and a large amount of alkali liquor can be taken away during the sampling process, which not only affects the detection of the analyzer, but also causes waste of alkali liquor. In addition, with the development of the hydrogen production industry, the stability and response speed of sampling and analysis are continuously improved. However, the existing technology is relatively simple in terms of processing before detection after sampling. A pressure reducing valve is generally provided for pressure reduction and a dryer is provided for drying. The commonly used hydrogen content analyzer based on thermal conductivity principle has a pressure resistance of about 0.1 MPa and requires a certain range of gas flow per unit time. The gas pressure along the oxygen side outlet is usually 1.8-3.2 MPa, and the degree of pressure reduction is relatively large. The opening degree of the pressure reducing valve needs to be set small, which results in a small amount of gas flowing through the pressure reducing valve per unit time. There is a large amount of gas to be reduced in the pipeline connected to the inlet end of the pressure reducing valve, and the gas sampled along the oxygen side outlet cannot pass through the pressure reducing valve in a short time, which causes a lag in the detection results of the analyzer. SUMMARY

[0003] The utility model solves the technical problem of reducing alkali liquor waste, reducing the lag of analyzer detection results, and enabling faster, more stable and accurate detection of hydrogen content in oxygen.

[0004] The utility model relates to a kind of electrolytic water hydrogen production sampling analysis device, including sampling device, analysis device and alkali liquor recovery device;

[0005] The sampling device includes a gas-water separator, a pressure reducing valve one and a condensation separator. The inlet end of the pressure reducing valve one is connected to the oxygen side outlet of the electrolytic cell through a pipeline. The gas-water separator is arranged on the pipeline connecting the oxygen side outlet of the electrolytic cell to the pressure reducing valve one. The outlet end of the pressure reducing valve one is connected to the inlet end of the condensation separator through a pipeline. The liquid outlet of the gas-water separator and the liquid outlet of the condensation separator are both connected to the alkali liquor recovery device through a pipeline.

[0006] The analysis device comprises a pressure reducing valve two, a dryer and an analyzer, the inlet end of the pressure reducing valve two is connected with the outlet end of the condensing separator through a pipeline, the outlet end of the pressure reducing valve two is connected with the inlet end of the dryer through a pipeline, the outlet end of the dryer is connected with the analyzer through a pipeline, and the inlet end of the dryer is provided with an adjusting valve one, a discharge branch pipe is further arranged on the pipeline connecting the pressure reducing valve two with the dryer, and an adjusting valve two is arranged on the discharge branch pipe.

[0007] Further, a liquid discharge tank is arranged on the pipeline connecting the gas-water separator and the condensing separator with the lye recovery device, and a check valve one is arranged between the liquid discharge tank and the lye recovery device on the pipeline connecting the gas-water separator with the lye recovery device.

[0008] Further, a filter is arranged on the pipeline connecting the pressure reducing valve two with the condensing separator.

[0009] Further, a sampling branch pipe one is further arranged between the filter and the pressure reducing valve two on the pipeline connecting the pressure reducing valve two with the condensing separator, and an adjusting valve three is arranged on the sampling branch pipe one.

[0010] Further, a pressure relief branch pipe is further arranged between the pressure reducing valve two and the discharge branch pipe on the pipeline connecting the pressure reducing valve two with the dryer, and a pressure relief valve is arranged on the pressure relief branch pipe.

[0011] Further, the dryer comprises two drying pipes, one end of the two drying pipes is connected with a three-way valve one, the three-way valve one is connected with the adjusting valve one, the other end of the two drying pipes is connected with a three-way valve two, and the three-way valve two is connected with the analyzer through a pipeline.

[0012] Further, a three-way valve three is further arranged on the pipeline connecting the three-way valve two with the analyzer, and a sampling branch pipe two is connected with the three-way valve three.

[0013] Further, the lye recovery device comprises a liquid collecting tank, a liquid level meter and a switch valve two, the liquid discharge port of the gas-water separator and the liquid discharge port of the condensing separator are connected with the liquid collecting tank through pipelines, the liquid level meter is used for detecting the liquid level height in the liquid collecting tank, and the switch valve two is arranged at the liquid outlet of the liquid collecting tank.

[0014] Further, the lye recovery device further comprises an exhaust pipe and a pressure transmitter, the exhaust pipe is connected at the top of the liquid collecting tank, and the pressure transmitter is arranged on the pipeline connecting the gas-water separator and the condensing separator with the liquid collecting tank.

[0015] The utility model discloses a kind of electrolytic water hydrogen production equipment, including electrolytic cell, oxygen separator, hydrogen separator, water replenishing tank and the electrolytic water hydrogen production sampling analysis device as above, the oxygen side outlet of the electrolytic cell is connected with oxygen separator by pipeline, hydrogen side outlet is connected with hydrogen separator by pipeline, and the liquid outlet of oxygen separator, hydrogen separator is connected with electrolytic cell by pipeline, the liquid outlet of the lye recovery device is connected with water tank by pipeline, the water tank is used to electrolytic cell and / or to oxygen separator, hydrogen separator liquid replenishing.

[0016] The utility model has the advantages of: alkali liquor carried by sampling gas can be effectively separated, and recovered by lye recovery device for subsequent use, so that the detection of analyzer is not affected by alkali liquor carried in gas, and the waste of alkali liquor is reduced, and the stability of pressure reducing valve one is improved.

[0017] Two-stage pressure reduction is performed on gas by pressure reducing valve one and pressure reducing valve two, which not only meets the pressure reduction requirement of gas and improves the stability of gas pressure after final pressure reduction, but also reduces the degree of pressure reduction required by single pressure reducing valve, so that the opening of single pressure reducing valve can be set larger, the gas flow through single pressure reducing valve per unit time can be larger, and the gas sampled along oxygen side outlet per unit time can be reduced faster and flow to analyzer, so that the hysteresis of analyzer detection result is reduced, the hydrogen content in oxygen can be detected faster and more stably, and the current situation of gas at oxygen side outlet of electrolytic cell can be better reflected. Based on the setting of regulating valve one, discharge branch pipe and regulating valve two, the gas flow per unit time flowing to analyzer can be adjusted, the requirement of gas flow per unit time during analyzer detection is met, and the accuracy of detection is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of the utility model electrolytic water hydrogen production equipment.

[0019] Figure 2 It is a schematic view of the utility model sampling device.

[0020] Figure 3 It is a schematic view of the utility model analysis device.

[0021] In the figure: 1, electrolytic cell; 2, sampling device; 201, switch valve one; 202, gas-water separator; 203, pressure reducing valve one; 204, condensing separator; 205, liquid discharge tank; 206, check valve one; 207, pressure reducing valve three; 208, ball valve one; 3, analysis device; 301, filter; 302, pressure reducing valve two; 303, regulating valve one; 304, three-way valve one; 305, drying tube; 306, three-way valve two; 307, three-way valve three; 308, analyzer; 309, regulating valve two; 310, regulating valve three; 311, flow meter one; 312, flow meter two; 313, pressure relief valve; 314, check valve two; 315, ball valve two; 4, lye recovery device; 401, liquid collection tank; 402, liquid level meter; 403, switch valve two; 404, water pump one; 405, exhaust pipe; 406, pressure transmitter; 5, oxygen separator; 6, hydrogen separator; 7, water pump two; 8, water tank; 9, water pump three. DETAILED DESCRIPTION

[0022] As Figures 1-3 shown, the utility model provides a kind of hydrogen sampling analysis device for electrolytic water, including sampling device 2, analysis device 3 and lye recovery device 4.

[0023] The sampling device 2 includes gas-water separator 202, pressure reducing valve one 203 and condensing separator 204.The inlet end of pressure reducing valve one 203 is connected with the oxygen side outlet of electrolytic cell 1 by pipeline, the gas-water separator 202 is arranged on the pipeline of pressure reducing valve one 203 connected with the oxygen side outlet of electrolytic cell 1, and the gas flowing along the oxygen side outlet of electrolytic cell 1 towards pressure reducing valve one 203 first enters gas-water separator 202 to separate the lye carried.The outlet end of pressure reducing valve one 203 is connected with the inlet end of condensing separator 204 by pipeline, and the gas after preliminary pressure reduction by pressure reducing valve one 203 enters condensing separator 204 to cool down and separate lye secondly, and the liquid discharge port of gas-water separator 202 and the liquid discharge port of condensing separator 204 are connected with lye recovery device 4 by pipeline, to recover the lye separated by gas in gas-water separator 202 and condensing separator 204 by lye recovery device 4.

[0024] The analysis device 3 comprises a pressure reducing valve two 302, a dryer and an analyzer 308. The inlet end of the pressure reducing valve two 302 is connected with the outlet end of the condensing separator 204 through a pipeline, and the gas after being cooled and secondarily separated by the condensing separator 204 in the sampling device 2 flows towards the pressure reducing valve two 302 in the analysis device 3, and is secondarily reduced under the action of the pressure reducing valve two 302. The outlet end of the pressure reducing valve two 302 is connected with the inlet end of the dryer through a pipeline, and the outlet end of the dryer is connected with the analyzer 308 through a pipeline, and the gas reduced by the pressure reducing valve two 302 and flowing towards the analyzer 308 is dried by the dryer. The inlet end of the dryer is provided with an adjusting valve one 303, and the pipeline connecting the pressure reducing valve two 302 with the dryer is further provided with a discharge branch pipe, and the discharge branch pipe is provided with an adjusting valve two 309. The adjusting valve one 303 and the adjusting valve two 309 are valves that can be opened and closed and the opening degree thereof can be adjusted, so as to adjust the flow rate of the gas that can pass through per unit time, for example, a needle valve.

[0025] The electrolytic water hydrogen sampling analysis device provided by the utility model can effectively separate the alkali liquor carried by the sampling gas based on the setting of the gas-water separator 202 and the condensing separator 204, and recycle the alkali liquor through the alkali liquor recycling device 4 for subsequent use, so as to avoid the influence of the alkali liquor carried in the gas on the detection of the analyzer 308 and reduce the waste of the alkali liquor. After the gas and the alkali liquor are preliminarily separated by the gas-water separator 202 and then enter the pressure reducing valve one 203 for pressure reduction, the gas does not contain a large amount of alkali liquor when passing through the pressure reducing valve one 203, the influence on the pressure reducing valve one 203 is reduced, and the stability of the pressure reducing valve one 203 is improved. The two-stage pressure reduction of the gas by the pressure reducing valve one 203 and the pressure reducing valve two 302 not only meets the pressure reduction requirement of the gas and improves the stability of the pressure of the gas after the final pressure reduction, but also makes the degree of pressure reduction required by a single pressure reducing valve lower, the opening degree of the single pressure reducing valve can be set larger, the flow rate of the gas passing through the single pressure reducing valve per unit time can be larger, and the gas sampled along the oxygen side outlet per unit time can be more quickly reduced in pressure and flow to the analyzer 308, so as to reduce the hysteresis of the detection result of the analyzer 308, the hydrogen content in the oxygen can be more quickly and stably detected, and the current situation of the gas at the oxygen side outlet of the electrolytic tank 1 can be better reflected. Based on the setting of the adjusting valve one 303, the discharge branch pipe and the adjusting valve two 309, the flow rate of the gas flowing to the analyzer 308 per unit time can be adjusted, the requirement of the analyzer 308 for the flow rate of the gas per unit time during detection can be met, and the accuracy of the detection is ensured. The excess gas is not dried and is directly discharged through the discharge branch pipe.

[0026] The gas-water separator 202 and the condensing separator 204 are connected with the pipeline of the lye recovery device 4, and each is provided with a liquid discharge tank 205. The lye separated by the gas-water separator 202 and the condensing separator 204 is guided into the corresponding liquid discharge tank 205, when the liquid level of the liquid discharge tank 205 reaches a set height, the liquid discharge tank 205 is automatically opened, and the lye flows into the lye recovery device 4, and when the liquid level of the liquid discharge tank 205 does not reach the set height, the liquid discharge tank 205 remains closed, the gas is blocked, and the waste caused by the gas flowing to the lye recovery device 4 is reduced, and the specific structure of the liquid discharge tank 205 is the prior art, which will not be repeated here. Since the gas-water separator 202 is the first stage of gas-water separation for sampling, the amount of separated lye is relatively more, and a check valve one 206 is preferably arranged on the pipeline of the gas-water separator 202 connected with the lye recovery device 4 between the liquid discharge tank 205 and the lye recovery device 4 to prevent backflow of the lye.

[0027] In one setting mode of the utility model, the condensing separator 204 specifically comprises a shell and a condenser body arranged inside the shell, the inlet end and the outlet end of the condenser body are both connected with a pipeline for medium flow, the inlet end, the outlet end and the liquid outlet of the condensing separator 204 are specifically arranged on the shell, the gas after pressure reduction by the pressure reducing valve one 203 enters the shell and exchanges heat with the medium to cool down when passing through the surface of the condenser body, wherein the condensed lye is separated from the gas and flows out along the liquid outlet, and the cooled gas flows to the analysis device 3 along the outlet end. Wherein, the medium can be cooling water or low-temperature compressed air, when the medium is low-temperature compressed air, a pressure reducing valve three 207 is arranged on the pipeline connected with the inlet end of the condenser body. In other setting modes of the utility model, the condensing separator 204 can also be other devices meeting the requirements.

[0028] A filter 301 is arranged on the pipeline connected with the condensing separator 204 and used for filtering the gas flowing to the pressure reducing valve two 302 to separate dust, condensed water and the like and improve the cleanliness of the gas. The filter 301 can be a T-shaped filter, as shown in Figure 3 A blowdown pipe is connected below the filter 301, and the dirt after gas filtration can be discharged from the blowdown pipe.

[0029] In the sampling device 2, the pressure reducing valve one 203 is connected with the pipeline of the oxygen side outlet of the electrolytic cell 1 and arranged between the gas-water separator 202 and the oxygen side outlet of the electrolytic cell 1, and a switch valve one 201 is further arranged and used for opening or closing the pipeline of the pressure reducing valve one 203 connected with the oxygen side outlet of the electrolytic cell 1. As shown in Figure 2As shown, ball valve one 208 is arranged at the position of the pipeline connecting electrolytic tank 1 oxygen side outlet between switch valve one 201 and electrolytic tank 1 oxygen side outlet, the position of the pipeline connecting gas-liquid separator 202 between back valve one 206 and alkali liquor recovery device 4, and the position of the pipeline connecting condensing separator 204 between liquid discharge tank 205 and alkali liquor recovery device 4. In normal operation state, ball valve one 208 is kept open. In some abnormal or maintenance conditions, ball valve one 208 at the corresponding position can be closed to meet the corresponding use requirements.

[0030] The pipeline connecting condensing separator 204 and reducing valve two 302 is further provided with sampling branch pipe one, and adjusting valve three 310 is arranged on the sampling branch pipe one. The sampling branch pipe one is arranged to facilitate sampling of gas before reducing valve two 302, so as to detect and judge the gas condition at this stage. Adjusting valve three 310 is a valve, such as a needle valve, which can be opened and closed and the opening degree can be adjusted, so as to adjust the flow rate of gas passing through per unit time.

[0031] The pipeline connecting reducing valve two 302 and the dryer is further provided with pressure relief branch pipe, and pressure relief valve 313 is arranged on the pressure relief branch pipe. If the pressure after pressure reduction by reducing valve two 302 exceeds the set pressure, pressure relief valve 313 is automatically opened to release the pressure through the pressure relief branch pipe to the safe range, thereby improving the safety of operation.

[0032] The dryer includes two drying pipes 305. One end of the two drying pipes 305 is connected with three-way valve one 304 through a pipeline, and three-way valve one 304 is connected with adjusting valve one 303. The end connected with adjusting valve one 303 of three-way valve one 304 is the inlet end of the dryer. The other end of the two drying pipes 305 is connected with three-way valve two 306 through a pipeline, and three-way valve two 306 is connected with analyzer 308 through a pipeline. The end connected with analyzer 308 of three-way valve two 306 is the outlet end of the dryer. Based on the above arrangement, when the currently connected drying pipe 305 is used for a certain period of time, the other drying pipe 305 is connected by switching three-way valve one 304 and three-way valve two 306, so that the corresponding replacement operation of the previous drying pipe 305 can be performed without stopping the machine.

[0033] Three-way valve three 307 is further arranged on the pipeline connecting analyzer 308 and three-way valve two 306, and sampling branch pipe two is connected to three-way valve three 307. Figure 3As shown, the branch pipe connected below the three-way valve three 307 is the sampling branch pipe two. Based on the setting, the gas at this stage can be sampled by the sampling pipe two through the switching of the three-way valve three 307, so as to detect the gas at this stage and calibrate the analyzer 308.

[0034] As shown in the analysis device 3, Figure 3 As shown, the analyzer 308 is connected with a discharge main pipe for discharging the gas detected by the analyzer 308 to the outside, and one end of the discharge main pipe connected with the analyzer 308 is provided with a check valve two 314 to avoid backflow of the gas. The discharge branch pipe and the pressure relief branch pipe are both connected with the discharge main pipe, and the gas detected by the analyzer 308, the excess gas discharged by the discharge branch pipe, and the gas discharged by the pressure relief branch pipe are all discharged to the outside from the end of the discharge main pipe. Compared with the connection between the pressure relief branch pipe and the discharge main pipe, the connection between the discharge branch pipe and the discharge main pipe is located upstream of the discharge main pipe. A flow meter one 311 is arranged on the pipeline connecting the three-way valve three 307 with the analyzer 308 for detecting the flow rate of the gas flowing to the analyzer 308, and a flow meter two 312 is arranged on the discharge branch pipe for detecting the flow rate of the gas discharged by the discharge branch pipe. The pressure relief valve two 302 is arranged on the pipeline connecting the condensation separator 204 between the filter 301 and the condensation separator 204, and a ball valve two 315 is arranged on the blowdown pipe and the discharge main pipe, and the ball valve two 315 on the discharge main pipe is located between the discharge branch pipe and the pressure relief branch pipe. In the normal operation state, the ball valve two 315 is kept open, and in some abnormal or maintenance conditions, the ball valve two 315 at the corresponding position can be closed to meet the corresponding use requirements.

[0035] The alkali liquor recovery device 4 includes a liquid collecting tank 401, a liquid level meter 402, and a switch valve two 403. The liquid discharge ports of the gas-water separator 202 and the condensation separator 204 are specifically connected with the liquid collecting tank 401 through pipelines. The liquid level meter 402 is used to detect the liquid level height in the liquid collecting tank 401. The switch valve two 403 is arranged at the liquid outlet of the liquid collecting tank 401, and the switch valve two 403 is the liquid outlet of the alkali liquor recovery device 4. The liquid level meter 402 and the switch valve two 403 are electrically connected with an external controller. When the liquid level meter 402 detects that the liquid in the liquid collecting tank 401 reaches the set liquid level height, the switch valve two 403 is opened.

[0036] The alkali liquor recovery device 4 further comprises an exhaust pipe 405 connected at the top of the liquid collecting tank 401 and a pressure transmitter 406 arranged on the pipeline connecting the gas-water separator 202 and the condensing separator 204 with the liquid collecting tank 401. The exhaust pipe 405 can keep the inside of the liquid collecting tank 401 at a normal pressure, and the pressure transmitter 406 is used to detect the pressure of the pipeline connecting the gas-water separator 202 and the condensing separator 204 with the liquid collecting tank 401. When the sampling device 2 fails to cause gas leakage and the pressure of the pipeline exceeds a set value, the pressure transmitter 406 sends a high-pressure alarm to prompt.

[0037] The utility model discloses further provide a kind of electrolytic water hydrogen production equipment, as shown in figure Figure 1 The oxygen side outlet of the electrolytic tank 1 is connected with the oxygen separator 5 through a pipeline, and the hydrogen side outlet is connected with the hydrogen separator 6 through a pipeline. The liquid outlets of the oxygen separator 5 and the hydrogen separator 6 are connected with the electrolytic tank 1 through a pipeline. A water pump 7 is arranged on the pipeline connecting the electrolytic tank 1 with the oxygen separator 5 and the hydrogen separator 6. The alkali liquor separated by the oxygen separator 5 and the hydrogen separator 6 is sent back to the electrolytic tank 1 through the water pump 7. As shown in figure Figure 1 When there are more than two electrolytic tanks 1, the sampling device 2 and the analysis device 3 in the electrolytic water hydrogen production sampling and analysis device are correspondingly provided with more than two.

[0038] The liquid outlet of the alkali liquor recovery device 4 is connected with the water tank 8 through a pipeline, i.e. the on-off valve 2 403 is connected with the water tank 8 through a pipeline. The alkali liquor recovery device 4 further comprises a water pump 1 404 arranged on the pipeline connecting the liquid collecting tank 401 with the water tank 8. The water pump 1 404 is used to drive the alkali liquor in the liquid collecting tank 401 to flow into the water tank 8 after the on-off valve 2 403 is opened. The alkali liquor mixed with the water in the water tank 8. The water tank 8 is used to supplement the electrolytic tank 1 and / or the oxygen separator 5 and the hydrogen separator 6 with liquid. In one arrangement of the utility model, the water tank 8 is connected with the electrolytic tank 1 through a pipeline, and a water pump 3 9 is arranged on the pipeline. The water pump 3 9 is used to pump water from the water tank 8 to directly supplement the electrolytic tank 1 with liquid. In another arrangement of the utility model, as shown in figure Figure 1 The water tank 8 is connected with the oxygen separator 5 and the hydrogen separator 6 through a pipeline, and a water pump 3 9 is arranged on the pipeline. When the liquid level of the oxygen separator 5 and the hydrogen separator 6 is low, the water pump 3 9 is used to pump water from the water tank 8 to supplement. The water tank 8 can be connected with a pure water machine to supplement the water in the water tank 8.

[0039] The electrolytic water hydrogen production equipment provided by the utility model, because of setting above-mentioned electrolytic water hydrogen production sampling analysis device, can recycle lye in sampling gas and continue to use, reduce the waste of lye, guarantee the efficiency of electrolytic water hydrogen production. When improving the pressure stability of sampling gas output to analyzer 308, the hysteresis of analyzer 308 detection result is reduced, the hydrogen content in oxygen can be detected more quickly and stably, the current situation of oxygen side outlet gas of electrolytic tank 1 is better reflected, and the safety and stability of equipment operation are improved.

[0040] Those skilled in the art should understand: the discussion of the above any embodiment is only exemplary, and is not intended to imply that the protection scope of the present application is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of one or more embodiments of the present application as described above, which are not provided in details for brevity.

[0041] One or more embodiments of the present application are intended to cover all such alternatives, modifications and variations falling within the broad scope of the present application. Therefore, any omission, modification, equivalent replacement, improvement, etc. made in the spirit and principle of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A sampling and analysis device for hydrogen production via water electrolysis, characterized in that, It includes a sampling device (2), an analysis device (3), and an alkali recovery device (4); The sampling device (2) includes a gas-liquid separator (202), a pressure reducing valve (203), and a condenser (204). The inlet end of the pressure reducing valve (203) is connected to the oxygen side outlet of the electrolytic cell (1) through a pipeline. The gas-liquid separator (202) is installed on the pipeline connecting the pressure reducing valve (203) to the oxygen side outlet of the electrolytic cell (1). The outlet end of the pressure reducing valve (203) is connected to the inlet end of the condenser (204) through a pipeline. The drain outlet of the gas-liquid separator (202) and the drain outlet of the condenser (204) are both connected to the alkali recovery device (4) through pipelines. The analytical device (3) includes a pressure reducing valve (302), a dryer, and an analyzer (308). The inlet end of the pressure reducing valve (302) is connected to the outlet end of the condenser separator (204) through a pipeline. The outlet end of the pressure reducing valve (302) is connected to the inlet end of the dryer through a pipeline. The outlet end of the dryer is connected to the analyzer (308) through a pipeline. A regulating valve (303) is provided at the inlet end of the dryer. A discharge branch pipe is also provided on the pipeline connecting the pressure reducing valve (302) to the dryer. A regulating valve (309) is provided on the discharge branch pipe.

2. The electrolytic water hydrogen production sampling and analysis device as described in claim 1, characterized in that, Both the gas-water separator (202) and the condenser separator (204) are equipped with a drain tank (205) on the pipeline connecting them to the alkali recovery device (4). Furthermore, a check valve (206) is provided between the drain tank (205) and the alkali recovery device (4) on the pipeline connecting the gas-water separator (202) and the alkali recovery device (4).

3. The electrolytic water hydrogen production sampling and analysis device as described in claim 1 or 2, characterized in that, A filter (301) is installed on the pipeline connecting the pressure reducing valve (302) to the condenser separator (204).

4. The electrolytic water hydrogen production sampling and analysis device as described in claim 3, characterized in that, On the pipeline connecting the pressure reducing valve 2 (302) to the condenser separator (204), a sampling branch pipe 1 is also provided between the filter (301) and the pressure reducing valve 2 (302), and a regulating valve 3 (310) is provided on the sampling branch pipe 1.

5. The electrolytic water hydrogen production sampling and analysis apparatus as described in any one of claims 1, 2, and 4, characterized in that, On the pipeline connecting the pressure reducing valve 2 (302) to the dryer, a pressure relief branch pipe is also provided between the pressure reducing valve 2 (302) and the discharge branch pipe, and a pressure relief valve (313) is provided on the pressure relief branch pipe.

6. The electrolytic water hydrogen production sampling and analysis apparatus as described in any one of claims 1, 2, and 4, characterized in that, The dryer includes two drying tubes (305), one end of which is connected to a three-way valve (304), and the three-way valve (304) is connected to a regulating valve (303). The other end of the two drying tubes (305) is connected to a three-way valve (306), and the three-way valve (306) is connected to an analyzer (308) through a pipeline.

7. The electrolytic water hydrogen production sampling and analysis device as described in claim 6, characterized in that, A three-way valve three (307) is also installed on the pipeline connecting the three-way valve two (306) to the analyzer (308), and a sampling branch pipe two is connected to the three-way valve three (307).

8. The electrolytic water hydrogen production sampling and analysis apparatus as described in any one of claims 1, 2, 4, and 7, characterized in that, The alkali recovery device (4) includes a collection tank (401), a level gauge (402), and a second switch valve (403). The drain outlet of the gas-liquid separator (202) and the drain outlet of the condenser separator (204) are connected to the collection tank (401) through pipelines. The level gauge (402) is used to detect the liquid level inside the collection tank (401). The second switch valve (403) is located at the outlet of the collection tank (401).

9. The electrolytic water hydrogen production sampling and analysis device as described in claim 8, characterized in that, The alkali recovery device (4) also includes an exhaust pipe (405) and a pressure transmitter (406). The exhaust pipe (405) is connected to the top of the collection tank (401), and the pressure transmitter (406) is installed on the pipeline connecting the gas-liquid separator (202) and the condenser separator (204) to the collection tank (401).

10. A water electrolysis hydrogen production device, characterized in that, The device includes an electrolytic cell (1), an oxygen separator (5), a hydrogen separator (6), a water replenishment tank (8), and an electrolytic water hydrogen production sampling and analysis device as described in any one of claims 1-9. The oxygen-side outlet of the electrolytic cell (1) is connected to the oxygen separator (5) via a pipeline, and the hydrogen-side outlet is connected to the hydrogen separator (6) via a pipeline. The outlets of the oxygen separator (5) and the hydrogen separator (6) are connected to the electrolytic cell (1) via pipelines. The outlet of the alkali recovery device (4) is connected to the water tank (8) via a pipeline. The water tank (8) is used to replenish the electrolytic cell (1) and / or the oxygen separator (5) and the hydrogen separator (6).

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