Water quality influence on hydrogen production by electrolysis detection system and use method

Abstract

The present application relates to the technical field of water electrolysis hydrogen production detection equipment, and discloses a water quality influence on water electrolysis hydrogen production detection system and use method, comprising: a tank body; a single electrolytic cell electrolysis hydrogen production system is arranged at the hydrogen inlet end of the tank body; an analysis and detection system is arranged at the hydrogen outlet end of the tank body; an inert gas purging system comprises: an inert gas bottle and an inert gas pressure control tank; in use, the system can realize the evaluation of the influence of water quality on water electrolysis hydrogen production in a low-cost manner, avoiding direct evaluation on the industrial device, which can cause the destruction of the hydrogen production industrial device and bring immeasurable loss; at the same time, the data obtained by using a small area electrolytic cell can be used to guide industrial production and provide a basis for expanding the water source problem of water electrolysis; the problem of single monitoring parameter of the existing water quality detection system, which is difficult to meet the high requirements of water quality for water electrolysis hydrogen production, is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of water electrolysis hydrogen production detection equipment, and particularly relates to a water quality influence on water electrolysis hydrogen production detection system and a use method. BACKGROUND

[0002] In the water electrolysis hydrogen production technology, water quality has a direct and key influence on hydrogen production efficiency and hydrogen quality. At present, the water electrolysis hydrogen production technology is widely used in the industrial and energy fields, but due to the difference in electrolysis characteristics under different water quality conditions, the hydrogen production efficiency and purity exist great fluctuations. The existing water electrolysis hydrogen production system often ignores the influence of water quality on the hydrogen production process, which not only limits the improvement of electrolysis efficiency, but also affects the quality of hydrogen, and further restricts its wide application in the clean energy field.

[0003] Impurities in water, such as minerals, microorganisms, organic matter, etc., can change the conductivity and pH value of the electrolyte, and further affect the electrolysis efficiency. For example, calcium and magnesium ions in high-hardness water can form deposits and block the electrode surface, reducing the electrolysis efficiency; the presence of organic matter may produce by-products in the electrolysis process, affecting the purity of hydrogen. In addition, the heat generated during electrolysis also affects the water quality, such as temperature rise may cause the change of water conductivity, further affecting the electrolysis efficiency. The existing water quality detection system and method mainly focuses on drinking water and wastewater treatment field, and the real-time monitoring and control technology for water quality characteristics in the process of water electrolysis hydrogen production is still in the initial stage. Lack of a system that can accurately detect water quality changes and real-time evaluate its influence on water electrolysis hydrogen production efficiency and hydrogen quality, limits the application of water quality control technology in the process of water electrolysis hydrogen production. Therefore, developing a system that can real-time monitor water quality changes and accurately evaluate its influence on water electrolysis hydrogen production is of great significance to improve the efficiency of water electrolysis hydrogen production and hydrogen quality, and promote its application in the field of clean energy.

[0004] Therefore, in order to solve the above problems, the application designs a water quality influence on water electrolysis hydrogen production detection system and use method, to realize the evaluation of water quality influence on water electrolysis hydrogen production at laboratory scale level and low cost, and to provide direct data support for industrial water electrolysis hydrogen production and basis for expanding water source problem of water electrolysis. SUMMARY

[0005] In view of the deficiencies of the prior art, the application provides a water quality influence on water electrolysis hydrogen production detection system and use method, which can evaluate the influence of water quality on industrial-scale water electrolysis hydrogen production through laboratory equipment, provide basis for expanding water source problem of water electrolysis, further reduce hydrogen production cost, and the application also provides a use method of the water quality influence on water electrolysis hydrogen production detection system; solves the problem of application feasibility evaluation of different water quality in the process of water electrolysis hydrogen production in the prior art.

[0006] To achieve the above-mentioned purpose of studying the influence of different water qualities on the effect of electrolytic water hydrogen production, the present application provides the following technical solutions:

[0007] The present application provides a first scheme: a water quality influence detection system for electrolytic water hydrogen production, comprising:

[0008] A tank body;

[0009] A single electrolytic cell electrolytic hydrogen production system is arranged at the hydrogen inlet end of the tank body and communicates with the tank body;

[0010] An analysis and detection system is arranged at the hydrogen outlet end of the tank body and communicates with the tank body;

[0011] A waste gas venting pipeline is arranged at the waste gas outlet end of the tank body and communicates with the tank body;

[0012] An inert gas purging system comprises:

[0013] An inert gas cylinder communicates with an inert gas pressure control tank, a single electrolytic cell electrolytic hydrogen production system and a collection system through an inert gas supply pipeline one;

[0014] The inert gas pressure control tank communicates with the tank body and the collection system through an inert gas supply pipeline two.

[0015] In a preferred embodiment of the present application, the single electrolytic cell electrolytic hydrogen production system comprises:

[0016] A single electrolytic cell, and connected with the single electrolytic cell:

[0017] A liquid inlet and supplement pipeline is arranged at the liquid supplement end of the single electrolytic cell and comprises a liquid supplement pipe and a liquid tank, the liquid supplement pipe is arranged between the single electrolytic cell and the liquid tank, and a first control valve and a liquid pump are arranged on the pipeline of the liquid supplement pipe;

[0018] A hydrogen purification pipeline is arranged at the hydrogen outlet end of the single electrolytic cell and comprises a hydrogen outlet pipeline, the hydrogen outlet pipeline is arranged between the single electrolytic cell and the tank body, and a hydrogen purification separator and a third control valve are arranged on the hydrogen outlet pipeline;

[0019] The single electrolytic cell electrolytic hydrogen production system further comprises:

[0020] An oxygen venting pipeline connected with the single electrolytic cell, and a second control valve is arranged on the oxygen venting pipeline.

[0021] In a preferred embodiment of the present application, the water quality influence detection system for electrolytic water hydrogen production further comprises a collection system, which is arranged on the hydrogen purification pipeline of the single electrolytic cell electrolytic hydrogen production system and communicates with the hydrogen outlet pipeline of the hydrogen purification pipeline, and comprises:

[0022] A hydrogen collection pipeline is arranged between the hydrogen discharge pipeline and the hydrogen pressurizing cylinder, and a hydrogen input end of the hydrogen collection pipeline is connected with the hydrogen discharge pipeline between the hydrogen purification separator and the third control valve, a discharge end is connected with the hydrogen pressurizing cylinder, and a fourth control valve and a one-way valve are arranged on the hydrogen collection pipeline;

[0023] A hydrogen collection tank is connected with the hydrogen pressurizing cylinder through a hydrogen pipeline, and a fifth control valve is arranged on the hydrogen pipeline;

[0024] The hydrogen purification pipeline of the single electrolytic cell hydrogen production system is further provided with a hydrogen evacuation pipeline, a hydrogen input end of the hydrogen evacuation pipeline is connected with the hydrogen discharge pipeline between the hydrogen purification separator and the third control valve, and the hydrogen evacuation pipeline is provided with a seventeenth control valve.

[0025] In a preferred embodiment of the present application, an inert gas input end of the inert gas supply pipeline one is connected with an inert gas bottle, two branches of an inert gas output end are respectively connected with a single electrolytic cell and an inert gas pressure control tank, a sixteenth control valve is arranged on the branch connected with the single electrolytic cell, and a thirteenth control valve is arranged on the branch connected with the inert gas pressure control tank.

[0026] In a preferred embodiment of the present application, one end of the inert gas supply pipeline two is connected with an inert gas discharge end of the inert gas pressure control tank, the other end is connected with an inert gas supplement end of the tank body, a ninth control valve, a first pressure gauge and an eleventh control valve are further arranged on the pipeline of the inert gas supply pipeline two, an inert gas pressure control pipeline and a pressurized gas supply pipeline are further arranged on the pipeline between the ninth control valve and the eleventh control valve, the other end of the inert gas pressure control pipeline is in communication with the inert gas pressure control tank, the pressurized gas supply pipeline is arranged at the hydrogen output end of the inert gas pressure control pipeline and is in communication with the hydrogen pressurizing cylinder, the first pressure gauge is arranged on the pipeline between the ninth control valve and the inert gas pressure control pipeline, a fourteenth control valve is further arranged on the pressurized gas supply pipeline, the pressurized gas supply pipeline is further connected with an inert gas output end branch of the inert gas bottle, and a fifteenth control valve is arranged on the inert gas output end branch.

[0027] In a preferred embodiment of the present application, the inert gas pressure control pipeline comprises a high-pressure unloading electromagnetic valve, and an eighth control valve and a tenth control valve arranged on the inert gas delivery control pipeline; the high-pressure unloading electromagnetic valve is arranged on the pipeline of the inert gas supply pipeline two and is connected with an inert gas input end of the inert gas delivery control pipeline, and an output end of the inert gas delivery control pipeline is in communication with the inert gas pressure control tank.

[0028] In a preferred embodiment of the present application, a pressurized bypass is further arranged on the bypass of the inert gas delivery control pipeline between the eighth control valve and the tenth control valve, a motor, a twelfth control valve and an inert gas control tank are arranged on the pressurized bypass, and the twelfth control valve is arranged at the gas inlet end of the inert gas control tank.

[0029] In a preferred embodiment of the present application, the analysis detection system comprises:

[0030] A chromatograph is connected with the tank body through a detection end hydrogen gas conduit, and a sixth control valve is arranged on the detection end hydrogen gas conduit; and a computer is electrically connected with the chromatograph.

[0031] The exhaust gas venting pipeline is further provided with a seventh control valve and a second pressure gauge.

[0032] The present application provides a second scheme: a use method of a water quality influence detection system for hydrogen production by electrolysis of water, comprising the following steps:

[0033] Step one: air tightness check

[0034] All control valves of the system are closed, the sixteenth control valve, the third control valve and the seventh control valve are opened, and the pressure value of the whole system is 0.12 MPa, the pressure is maintained for 30 minutes, and the numerical value change of the second pressure gauge is observed;

[0035] Step two: inert gas purging

[0036] All control valves of the system are closed, the sixteenth control valve, the third control valve and the seventh control valve are opened, and the system is purged for 5 minutes, then the seventh control valve, the sixteenth control valve and finally the third control valve are closed;

[0037] Step three: electrolytic hydrogen production

[0038] All control valves of the system are closed, the second control valve and the seventeenth control valve are opened, the first control valve and the liquid pump are opened, direct current and the liquid to be detected are introduced into the single electrolytic cell, hydrogen and oxygen are obtained through chemical reaction, the oxygen is discharged through the oxygen exhaust pipeline, and the hydrogen is discharged through the seventeenth control valve pipeline;

[0039] Step four: sampling test

[0040] The fourth control valve is closed, the third control valve is opened, the time is maintained for 1 minute, the third control valve is closed, the fourth control valve is opened, the eleventh control valve and the sixth control valve are opened, and the hydrogen sample is blown into the chromatograph.

[0041] The present application provides a third scheme: a use method of a water quality influence detection system for hydrogen production by electrolysis of water, comprising the following steps:

[0042] Step one: air tightness check

[0043] Close all control valves of the system, open the sixteenth control valve, the third control valve, and control the valve to the whole system pressure value 0.12MPa, and pressurize for 30 minutes, and watch the value change of the second pressure table;

[0044] Step two: inert gas purging

[0045] Close all control valves of the system, open the sixteenth control valve, the third control valve, and the seventh control valve to purge the system, and the purging time is 5 minutes, then close the seventh control valve, the sixteenth control valve, and finally close the third control valve;

[0046] Step three: electrolytic hydrogen production

[0047] Close all control valves of the system, open the second control valve and the seventeenth control valve, open the first control valve and the liquid pump, and pass the direct current and the liquid to be tested into the single electrolytic cell, so as to obtain hydrogen and oxygen through chemical reaction, the oxygen is discharged through the oxygen discharge pipeline, and the hydrogen is discharged through the seventeenth control valve pipeline;

[0048] Step four: hydrogen collection

[0049] Open the fourth control valve and the one-way valve to make hydrogen enter the hydrogen pressurizing cylinder, open the fifth control valve and the fifteenth control valve, and the high-pressure inert gas pushes the piston to press the hydrogen into the hydrogen collection tank, and the piston is reset due to the spring;

[0050] Step five: sampling test

[0051] Close the fourth control valve, open the third control valve, maintain for 1 minute, close the third control valve, open the fourth control valve, and open the eleventh control valve and the sixth control valve at the same time, and blow the hydrogen sample into the chromatograph.

[0052] Compared with the prior art, the present application provides a water quality influence detection system for electrolytic water hydrogen production and a use method, which has the following beneficial effects:

[0053] The present application designs a laboratory water quality influence detection system for electrolytic water hydrogen production, which comprises a single electrolytic cell electrolytic hydrogen production system, a tank body, an analysis and detection system, an inert gas purging system and a collection system, which can:

[0054] (1) improve the electrolysis efficiency: by accurately controlling and monitoring the water quality, the influence of impurities on the electrolysis efficiency is avoided, and the hydrogen production efficiency is improved;

[0055] (2) promote water quality regulation: provide data support for the application of water quality regulation technology in the process of electrolytic water hydrogen production, and optimize the water quality regulation strategy through real-time data feedback;

[0056] (3) Promote the development of clean energy: by improving the efficiency of water electrolysis and hydrogen quality, promote the wide application of hydrogen energy as a clean energy, contribute to the sustainable energy development;

[0057] At the same time, the system can realize the evaluation of the influence of water quality on hydrogen production by water electrolysis in a low-cost way, avoiding direct evaluation on industrial devices, which may cause irreparable loss due to the destruction of hydrogen production industrial devices; the data obtained by the small area electrolytic cell used in the system can be used to guide industrial production and provide basis for expanding the water source problem of water electrolysis. BRIEF DESCRIPTION OF DRAWINGS

[0058] Figure 1 The system structure diagram of the water quality influence detection system for water electrolysis hydrogen production of the application is shown in the figure.

[0059] In the figure: 1, tank body; 2, liquid tank; 3, first control valve; 4, liquid pump; 5, single electrolytic cell; 6, second control valve; 7, purification separator; 8, third control valve; 9, fourth control valve; 10, check valve; 11, hydrogen gas pressurizing cylinder; 12, fifth control valve; 13, hydrogen gas collecting tank; 14, sixth control valve; 15, chromatograph; 16, computer; 17, seventh control valve; 18, inert gas pressure control tank; 19, eighth control valve; 20, ninth control valve; 21, tenth control valve; 22, first pressure gauge; 23, eleventh control valve; 24, motor; 25, twelfth control valve; 26, thirteenth control valve; 27, fourteenth control valve; 28, fifteenth control valve; 29, sixteenth control valve; 30, piston; 31, spring; 32, inert gas bottle; 33, second pressure gauge; 34, high pressure unloading electromagnetic valve; 35, inert gas control tank; 36, seventeenth control valve. DETAILED DESCRIPTION

[0060] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0061] Please refer to Figure 1 The application provides a technical solution:

[0062] The utility model relates to a kind of water quality influences detection system of electrolytic water preparation hydrogen, for the evaluation experiment of water quality influence electrolytic hydrogen production effect in laboratory, including single electrolytic cell electrolytic hydrogen production system, tank 1 and analysis detection system, the single electrolytic cell electrolytic hydrogen production system is used to change the water of different water quality in use to carry out electrolytic hydrogen production, including single electrolytic cell 5, and with single electrolytic cell 5 connection liquid inlet liquid supplement pipeline, oxygen emptying pipeline and hydrogen purification pipeline, the hydrogen gas inlet end of the tank 1 is connected with hydrogen purification pipeline, for the hydrogen gas after purification is introduced into tank 1, the analysis detection system is set in the hydrogen gas discharge end of tank 1, including chromatograph 15 and computer 16, the chromatograph 15 is communicated with the hydrogen gas discharge end of tank 1 by detection end hydrogen gas guide pipe, for detecting hydrogen quality, and sixth control valve 14 is set on the detection end hydrogen gas guide pipe and controls hydrogen guide pipe, the computer 16 is connected with chromatograph 15 by wire, for recording and showing the detection result of chromatograph 15, complete the evaluation process of the hydrogen quality generated under the condition of different water quality.

[0063] The liquid inlet liquid supplement pipeline is set in the water supplement end of single electrolytic cell 5, including liquid supplement water pipe and liquid tank 2, one end of the liquid supplement water pipe is connected with single electrolytic cell 5, the other end is immersed in liquid tank 2, for supplementing the water in liquid tank 2 to single electrolytic cell 5, to ensure the process of electrolytic hydrogen production, and to control the opening and closing of liquid supplement water pipe in use, first control valve 3 and liquid pump 4 are also provided on the pipeline of the liquid supplement water pipe, the flow in the liquid supplement water pipe is ensured by liquid pump 4 in use, the opening and closing of liquid supplement water pipe is controlled by first control valve 3, and the water supplement process of single electrolytic cell 5 is controlled by first control valve 3 in use.

[0064] The oxygen emptying pipeline is set in the oxygen discharge end of single electrolytic cell 5, for discharging and collecting the oxygen generated, including oxygen exhaust pipe, one end of the oxygen exhaust pipe is connected with single electrolytic cell 5, the other end is connected with emptying end or oxygen collection end, and second control valve 6 is also provided on the pipeline of the oxygen exhaust pipe, the opening and closing of oxygen exhaust pipe is controlled by second control valve 6, and the process of oxygen discharge is controlled by second control valve 6 in use.

[0065] The hydrogen purification pipeline is set in the hydrogen discharge end of single electrolytic cell 5, including hydrogen discharge pipeline, one end of the hydrogen discharge pipeline is connected with single electrolytic cell 5, the other end is connected with the hydrogen gas inlet end of tank 1, and hydrogen purification separator 7 and third control valve 8 are provided on the hydrogen discharge pipeline, hydrogen purification separator 7 is used for purifying the hydrogen generated by electrolytic water in use, the opening and closing of hydrogen discharge pipeline is controlled by third control valve 8, and then the hydrogen supply process in tank 1 is controlled by third control valve 8 in use.

[0066] The tank body 1 is also provided with a tank body exhaust pipeline at one end away from the hydrogen inlet end, the tank body exhaust pipeline comprises a tank body exhaust pipeline, and a seventh control valve 17 and a second pressure gauge 33 are arranged on the tank body exhaust pipeline. In use, the opening and closing of the tank body exhaust pipeline is controlled through the seventh control valve 17, thereby controlling the exhaust process of the residual gas in the tank body 1, and the pressure and flow of the tank body exhaust pipeline are observed through the second pressure gauge 33 of the tank body exhaust pipeline.

[0067] As a preferred embodiment, please refer to Figure 1 The water quality influence detection system for hydrogen production by electrolysis of water also comprises a collection system for hydrogen collection and sampling, which is in communication with the hydrogen exhaust pipeline of the hydrogen purification pipeline and comprises a hydrogen collection pipeline, a hydrogen pressurizing cylinder 11 and a hydrogen collection tank 13. One end of the hydrogen collection pipeline is connected with the hydrogen exhaust pipeline between the hydrogen purification separator 7 and the third control valve 8, the other end is connected with the hydrogen pressurizing cylinder 11, and a fourth control valve 9 and a one-way valve 10 are arranged on the hydrogen collection pipeline. The one-way valve 10 is arranged on the hydrogen collection pipeline close to the pressurizing cylinder 11. The hydrogen collection tank 13 is connected with the hydrogen pressurizing cylinder 11 through a hydrogen pipeline, and a fifth control valve 12 is arranged on the hydrogen pipeline. The hydrogen collection process of the hydrogen collection tank 13 is controlled through the fifth control valve 12. When the hydrogen is collected by using the collection system, the third control valve 8 is closed and the fourth control valve 9 is opened, so that the hydrogen purified by the hydrogen purification separator 7 can enter the hydrogen pressurizing cylinder 11 through the one-way valve 10, and is gathered in the hydrogen pressurizing cylinder 11. When the hydrogen pressure reaches a certain value, the fifth control valve 12 is opened, so that the hydrogen enters the hydrogen collection tank 13 for collection.

[0068] The hydrogen pressurizing cylinder 11 is also provided with a piston plate 30 and a spring 31. The piston plate 30 is movably installed in the hydrogen pressurizing cylinder 11 and is connected with one end of the spring 31. The other end of the spring 31 is connected with the side wall of the end of the hydrogen pressurizing cylinder 11. In use, the hydrogen in the hydrogen pressurizing cylinder 11 is pushed out by controlling the elongation of the spring 31, so that the hydrogen enters the hydrogen collection tank 13 for collection.

[0069] The hydrogen exhaust pipeline is not purged and the impure hydrogen in the hydrogen exhaust pipeline is not exhausted during the hydrogen collection process. An exhaust branch is arranged between the hydrogen purification separator 7 and the third control valve 8, and a seventeenth control valve 36 is arranged on the exhaust branch to control the opening and closing of the exhaust branch.

[0070] As a preferred embodiment, please refer to Figure 1The water quality affecting electrolytic water hydrogen production detection system further comprises an inert gas purging system for purging the entire system, the inert gas purging system comprising an inert gas bottle 32 and an inert gas pressure control tank 18; the inert gas bottle 32 is used to provide inert gas to the entire system and purge the system pipeline to ensure experimental quality. The inert gas bottle 32 is connected to the inert gas supplement end of the inert gas pressure control tank 18 through an inert gas supply pipeline I, and provides inert gas to the inert gas pressure control tank 18 through the inert gas supply pipeline I; the inert gas discharge end of the inert gas pressure control tank 18 is connected to the inert gas supplement end of the tank body 1 through an inert gas supply pipeline II, and provides inert gas to the tank body 1 to achieve the purpose of pressurizing hydrogen in the tank body 1, and at the same time, the tank body 1 is purged by introducing inert gas into the tank body 1 during use to ensure experimental quality.

[0071] The inert gas input end of the inert gas supply pipeline I is connected to the inert gas bottle 32, and the two branches of the inert gas output end are respectively connected to the single electrolytic cell 5 and the inert gas pressure control tank 18; a sixteenth control valve 29 is arranged on the branch connected to the single electrolytic cell 5, and the opening and closing of the corresponding branch is controlled through the sixteenth control valve 29, so that inert gas can enter the single electrolytic cell 5 to purge the entire single electrolytic cell hydrogen production system; a thirteenth control valve 26 is arranged on the branch connected to the inert gas pressure control tank 18, and the thirteenth control valve 26 controls the opening and closing of the corresponding branch to supplement the inert gas pressure control tank 18.

[0072] One end of the second inert gas supply pipeline is connected with the inert gas discharge end of the inert gas pressure tank 18, and the other end is connected with the inert gas supplement end of the tank body 1. A ninth control valve 20, a first pressure gauge 22 and an eleventh control valve 23 are further arranged on the pipeline of the second inert gas supply pipeline. The ninth control valve 20 is arranged at the inert gas input end of the second inert gas supply pipeline, the eleventh control valve 23 is arranged at the inert gas output end of the second inert gas supply pipeline, and an inert gas pressure pipeline and a pressurized gas supply pipeline are further arranged on the pipeline between the ninth control valve 20 and the eleventh control valve 23. The other end of the inert gas pressure pipeline is connected with the inert gas pressure tank 18, the pressurized gas supply pipeline is arranged at the hydrogen output end of the inert gas pressure pipeline and communicates with the hydrogen pressurizing cylinder 11, and the first pressure gauge 22 is arranged on the pipeline between the ninth control valve 20 and the inert gas pressure pipeline. In use, the inert gas in the inert gas pressure tank 18 is introduced into the tank body 1 by opening the ninth control valve 20 and the eleventh control valve 23, so as to pressurize the hydrogen in the tank body 1, and at the same time, the tank body 1 is cleaned by introducing the inert gas into the tank body 1. The inert gas pressure pipeline can ensure the stability and pressure of the inert gas injected into the tank body 1, and pressurize the gas in the tank body 1. The pressurized and stable inert gas is introduced into the rear end of the hydrogen pressurizing cylinder 11 through the pressurized gas supply pipeline, the spring 31 is elongated, the hydrogen in the hydrogen pressurizing cylinder 11 is pushed out, so that the hydrogen enters the hydrogen collecting tank 13 for collection, and the fourteenth control valve 27 is further arranged on the pressurized gas supply pipeline to control the opening and closing of the pressurized gas supply pipeline. The first pressure gauge 22 is used to monitor the inert gas flow in the second inert gas supply pipeline.

[0073] The pressurized gas supply pipeline is further connected with the inert gas output end branch of the inert gas bottle 32 to provide inert gas for the hydrogen pressurizing cylinder 11, and the fifteenth control valve 28 is further arranged on the branch.

[0074] The inert gas pressure control pipeline comprises a high-pressure unloading electromagnetic valve 34, and an eighth control valve 19 and a tenth control valve 21 arranged on the inert gas delivery control pipeline; the high-pressure unloading electromagnetic valve 34 is arranged on the pipeline of the second inert gas supply pipeline and connected with the inert gas input end of the inert gas delivery control pipeline; when the inert gas is supplied at normal pressure, the eighth control valve 19 and the tenth control valve 21 are closed; when the inert gas is supplied at constant pressure, when the gas pressure in the pipeline of the second inert gas supply pipeline is less than the set threshold value of the high-pressure unloading electromagnetic valve 34, the high-pressure unloading electromagnetic valve 34 is closed, the eighth control valve 19 and the tenth control valve 21 are opened, and the inert gas in the second inert gas supply pipeline is returned to the inert gas pressure control tank 18 through the inert gas delivery control pipeline. Meanwhile, a pressurizing bypass is arranged on the bypass of the inert gas delivery control pipeline, and a motor 24, a twelfth control valve 25 and an inert gas control tank 35 are arranged on the pressurizing bypass; the twelfth control valve 25 is arranged at the gas inlet end of the inert gas control tank 35; during the circulation of the inert gas, the twelfth control valve 25 is opened (at this time, the eighth control valve 19 can also be closed; during this process, the main function of the eighth control valve 19 is to protect the pressurizing bypass pipeline; closing the eighth control valve 19 can realize the rapid collection of the inert gas in the inert gas control tank 35), and the inert gas enters the inert gas control tank 35 through the pressurizing bypass to be collected; when the amount of the collected inert gas in the inert gas control tank 35 reaches the required amount, the eighth control valve 19 and the ninth control valve 20 are closed, and the tenth control valve 21, the eleventh control valve 23, the twelfth control valve 25 and the motor 24 are opened; under the action of the motor 24, the inert gas entering the high-pressure unloading electromagnetic valve 34 can be greater than the set threshold value of the high-pressure unloading electromagnetic valve 34, so that the tank body 1 is stably pressurized.

[0075] In order to evaluate the oxygen content in hydrogen, the purpose of this embodiment is to test the reliability of the equipment and measure the oxygen content in hydrogen electrolyzed by ultra-pure water in a small area single cell, so as to evaluate the safety, and also as a blank comparison for other embodiments.

[0076] The experimental liquid to be electrolyzed is ultra-pure water.

[0077] Step one: air tightness test

[0078] Close all control valves of the system, open the sixteenth control valve 29 and the third control valve 8, and the pressure value of the whole system is 0.12 MPa; pressure is maintained for 30 minutes, and the value change of the second pressure table 33 is observed;

[0079] Step two: inert gas purging

[0080] Close all control valves of the system, open the sixteenth control valve 29, the third control valve 8, and the seventh control valve 17 to purge the system, and the purging time is 5 minutes. Then, close the seventh control valve 17 first, then close the sixteenth control valve 29, and finally close the third control valve 8.

[0081] Step three: electrolytic hydrogen production

[0082] Close all control valves of the system, open the second control valve 6 and the seventeenth control valve 36, open the first control valve 3 and the liquid pump 4, and pass direct current and the liquid to be tested into the single electrolytic cell 5 to obtain hydrogen and oxygen through chemical reaction. The oxygen is discharged through the oxygen discharge pipeline, and the hydrogen is discharged through the seventeenth control valve 36 pipeline.

[0083] Step four: sampling test

[0084] Close the fourth control valve 9, open the third control valve 8, and maintain for 1 minute. Then, close the third control valve 8, open the fourth control valve 9, and open the eleventh control valve 23 and the control valve 14 to blow the hydrogen sample into the chromatograph 15. The detector is a TCD detector. The chromatographic detection results are shown in Table 1.

[0085] Table 1: Oxygen content in hydrogen

[0086] Date Time Oxygen in hydrogen (mole fraction) 20231114 9:30 0.00021 20231114 10:00 0.00022 20231114 10:30 0.00021 20231114 11:00 0.00022

[0087] The electrolysis of organic wastewater on the hydrogen quality evaluation, using ethanol, acetic acid, ethyl acetate solution, solution water using the ultrapure water of example 1, COD value using COD reagent (Germany Rovi ET99974) and visible spectrophotometer (Rovi SpectroDirect) test. The COD of the prepared solution is 2760 mg / L.

[0088] Step one: air tightness check

[0089] Close all control valves of the system, open the sixteenth control valve 29, the third control valve 8, and the seventh control valve 17 to purge the system, and the purging time is 5 minutes. Then, close the seventh control valve 17 first, then close the sixteenth control valve 29, and finally close the third control valve 8.

[0090] Step two: inert gas purging

[0091] Close all control valves of the system, open the sixteenth control valve 29, the third control valve 8, and the seventh control valve 17 to purge the system, and the purging time is 5 minutes. Then, close the seventh control valve 17 first, then close the sixteenth control valve 29, and finally close the third control valve 8.

[0092] Step three: electrolytic hydrogen production

[0093] Close all control valves of the system, open the second control valve 6 and the fourth control valve 9, open the first control valve 3 and the liquid pump 4, pass direct current and the liquid to be tested into the single electrolytic cell 5, and obtain hydrogen and oxygen through chemical reaction, the oxygen is discharged through the oxygen discharge pipeline, and the hydrogen is collected through the fourth control valve 9 pipeline;

[0094] Step four: hydrogen collection

[0095] Open the fourth control valve and the one-way valve 10, hydrogen enters the hydrogen pressurizing cylinder 11, open the fifth control valve 12 and the fifteenth control valve 28, the high-pressure inert gas pushes the piston 30 to press the hydrogen into the hydrogen collection tank 13, and the piston 30 is reset due to the spring 31;

[0096] Step five: sampling test

[0097] Close the fourth control valve 9, open the third control valve 8, and maintain for 1 minute, close the third control valve 8, open the fourth control valve 9, and open the eleventh control valve 23 and the sixth control valve 14 at the same time, blow the hydrogen sample into the chromatograph 15; the detector in the chromatograph is selected as a TCD detector, and the standard GB / T 8984-2008 is executed; the chromatographic detection result: the oxygen content in hydrogen is shown in Table 2:

[0098] Table 2: Oxygen content in hydrogen Table 2

[0099] Date Time Carbon monoxide Carbon dioxide 20231115 9:30 0.0008 0.0032 20231115 10:00 0.0008 0.0034 20231115 10:30 0.0007 0.0032 20231115 11:00 0.0008 0.0033

[0100] The influence of electrolysis of potassium chloride inorganic salt solution on the quality of hydrogen is evaluated, and the balance is configured with potassium chloride solution, and the solution concentration is 2.3547g / L.

[0101] Step one: air tightness check

[0102] Close all control valves of the system, open the sixteenth control valve 29 and the third control valve 8, and the pressure value of the whole system is 0.12MPa, and the pressure is maintained for 30 minutes, and the value change of the second pressure table 33 is observed;

[0103] Step two: inert gas purging

[0104] Close all control valves of the system, open the inert gas sixteenth control valve 29, the third control valve 8 and the seventh control valve 17 to purge the system, the purging time is 5 minutes, then close the seventh control valve 17, then close the sixteenth control valve 29, and finally close the third control valve 8;

[0105] Step three: electrolytic hydrogen production

[0106] Close all control valves of the system, open the second control valve 6 and the fourth control valve 9, open the first control valve 3 and the liquid pump 4, pass direct current and the liquid to be tested into the single electrolytic cell 5, and obtain hydrogen and oxygen through chemical reaction, the oxygen is discharged through the oxygen discharge pipeline, and the hydrogen is collected through the fourth control valve 9 pipeline;

[0107] Step four: hydrogen collection

[0108] Open the fourth control valve 9 and the one-way valve 10, hydrogen enters the hydrogen pressurizing cylinder 11, open the fifth control valve 12 and the fifteenth control valve 28, the high-pressure inert gas pushes the piston 30 to press the hydrogen into the hydrogen collection tank 13, and the piston 30 is reset due to the spring 31;

[0109] Step five: sampling test

[0110] Close the fourth control valve 9, open the third control valve 8, maintain for 1 minute, close the third control valve 8, open the fourth control valve 9, and open the eleventh control valve 23 and the sixth control valve 14 at the same time, and blow the hydrogen sample into the chromatograph 15;

[0111] The detector in the chromatograph is a TCD detector

[0112] The chromatographic detection result: the oxygen content in the hydrogen is shown in Table 3;

[0113] Table 3: Oxygen content in hydrogen Table 3

[0114] Date Time Chlorine 20231116 9:30 0.00011 20231116 10:00 0.00012 20231116 10:30 0.00011 20231116 11:00 0.00011

[0115] The influence of electrolysis of potassium sulfate inorganic salt aqueous solution on the quality of hydrogen is evaluated, and the balance is configured with potassium sulfate solution, and the solution concentration is 3.2467g / L.

[0116] Step one: air tightness check

[0117] Close all control valves of the system, open the sixteenth control valve 29 and the third control valve 8, and the whole system pressure value is 0.12MPa, and the pressure is maintained for 30 minutes, and the value change of the second pressure table 33 is observed;

[0118] Step two: inert gas purging

[0119] Close all control valves of the system, open the sixteenth control valve 29, the third control valve 8 and the seventh control valve 17 to purge the system, the purging time is 5 minutes, then close the seventh control valve 17, then close the sixteenth control valve 29, and finally close the third control valve 8;

[0120] Step three: electrolytic hydrogen production

[0121] Close all control valves of the system, open the second control valve 6 and the fourth control valve 9, open the first control valve 3 and the liquid pump 4, pass direct current and the liquid to be tested into the single electrolytic cell 5, and obtain hydrogen and oxygen through chemical reaction, the oxygen is discharged through the oxygen discharge pipeline, and the hydrogen is collected through the fourth control valve 9 pipeline;

[0122] Step four: hydrogen collection

[0123] Open the fourth control valve 9 and the one-way valve 10, hydrogen enters the hydrogen pressurizing cylinder 11, open the fifth control valve 12 and the fifteenth control valve 28, the high-pressure inert gas pushes the piston 30 to press the hydrogen into the hydrogen collection tank 13, and the piston 30 is reset due to the spring 31;

[0124] Step five: sample test

[0125] Close the fourth control valve 9, open the third control valve 8, maintain for 1 minute, close the third control valve 8, open the fourth control valve 9, open the eleventh control valve 23 and the sixth control valve 14 at the same time, and blow the hydrogen sample into the chromatograph 15; in the chromatograph, the detector is selected as an SCD detector;

[0126] Chromatographic detection result: the oxygen content in hydrogen is shown in Table 4:

[0127] Table 4: Oxygen content in hydrogen Table 4

[0128] Date Time Sulfur dioxide 20231117 9:30 Not detected 20231117 10:00 Not detected 20231117 10:30 Not detected 20231117 11:00 Not detected

[0129] As can be seen from the above embodiment 2 to embodiment 5, the water quality influence detection system designed in embodiment 1 of the present application can effectively complete the experiment of the influence of water quality on the effect of hydrogen production by electrolysis in the laboratory.

[0130] It should be noted that, in this text, relational terms such as first and second are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article, or equipment. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article, or equipment including the element.

[0131] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A laboratory-grade water quality influence detection system for hydrogen production by electrolysis of water, characterized by: The application relates to a hydrogen production system, which comprises the following components: a tank (1); a single electrolytic cell hydrogen production system arranged at a hydrogen inlet end of the tank (1) and in communication with the tank (1); an analysis and detection system arranged at a hydrogen outlet end of the tank (1) and in communication with the tank (1); a waste gas venting pipeline arranged at a waste gas outlet end of the tank (1) and in communication with the tank (1), wherein the waste gas venting pipeline is further provided with a seventh control valve (17) and a second pressure gauge (33); an inert gas purging system, which comprises: an inert gas bottle (32) in communication with an inert gas pressure tank (18), the single electrolytic cell hydrogen production system and a collection system through an inert gas supply pipeline I; the inert gas pressure tank (18) in communication with the tank (1) and the collection system through an inert gas supply pipeline II; the single electrolytic cell hydrogen production system comprises: a single electrolytic cell (5) and the following components connected with the single electrolytic cell (5): a liquid inlet and supplement pipeline arranged at a liquid supplement end of the single electrolytic cell (5) and comprising a liquid supplement pipeline and a liquid tank (2), wherein the liquid supplement pipeline is arranged between the single electrolytic cell (5) and the liquid tank (2), and a first control valve (3) and a liquid pump (4) are arranged on the liquid supplement pipeline; a hydrogen purification pipeline arranged at a hydrogen outlet end of the single electrolytic cell (5) and comprising a hydrogen outlet pipeline arranged between the single electrolytic cell (5) and the tank (1), wherein a hydrogen purification separator (7) and a third control valve (8) are arranged on the hydrogen outlet pipeline; the single electrolytic cell hydrogen production system further comprises: an oxygen venting pipeline connected with the single electrolytic cell (5) and provided with a second control valve (6); the collection system is arranged on the hydrogen purification pipeline of the single electrolytic cell hydrogen production system and in communication with the hydrogen outlet pipeline of the hydrogen purification pipeline, and comprises: a hydrogen collection pipeline arranged between the hydrogen outlet pipeline and a hydrogen pressurizing cylinder (11), wherein a hydrogen input end of the hydrogen collection pipeline is connected with the hydrogen outlet pipeline between the hydrogen purification separator (7) and the third control valve (8), a hydrogen outlet end of the hydrogen collection pipeline is connected with the hydrogen pressurizing cylinder (11), and a fourth control valve (9) and a one-way valve (10) are arranged on the hydrogen collection pipeline; a hydrogen collection tank (13) connected with the hydrogen pressurizing cylinder (11) through a hydrogen pipeline, wherein a fifth control valve (12) is arranged on the hydrogen pipeline; the hydrogen purification pipeline of the single electrolytic cell hydrogen production system is further provided with a hydrogen venting pipeline, a hydrogen input end of the hydrogen venting pipeline is connected with the hydrogen outlet pipeline between the hydrogen purification separator (7) and the third control valve (8), and the hydrogen venting pipeline is provided with a seventeenth control valve (36); an input end of the inert gas supply pipeline I is connected with the inert gas bottle (32), two branches of an output end of the inert gas supply pipeline I are respectively connected with the single electrolytic cell (5) and the inert gas pressure tank (18), a sixteenth control valve (29) is arranged on the branch connected with the single electrolytic cell (5), and a thirteenth control valve (26) is arranged on the branch connected with the inert gas pressure tank (18). One end of the second inert gas supply pipeline is connected with the gas discharge end of the inert gas surge tank (18), the other end is connected with the inert gas supplement end of the tank body (1), and a ninth control valve (20), a first pressure gauge (22) and an eleventh control valve (23) are further arranged on the pipeline of the second inert gas supply pipeline, and an inert gas control pipeline and a pressurized gas supply pipeline are further arranged on the pipeline between the ninth control valve (20) and the eleventh control valve (23); the other end of the inert gas control pipeline is communicated with the inert gas surge tank (18), the pressurized gas supply pipeline is arranged at the inert gas output end of the inert gas control pipeline and communicated with the hydrogen pressurizing cylinder (11), and the first pressure gauge (22) is arranged on the pipeline between the ninth control valve (20) and the inert gas control pipeline; and a fourteenth control valve (27) is further arranged on the pressurized gas supply pipeline, and the pressurized gas supply pipeline is further connected with the inert gas output end branch of the inert gas cylinder (32) and provided with a fifteenth control valve (28) on the inert gas output end branch; The inert gas control pipeline comprises a high-pressure unloading electromagnetic valve (34), an eighth control valve (19) and a tenth control valve (21) arranged on the inert gas delivery control pipeline; the high-pressure unloading electromagnetic valve (34) is arranged on the pipeline of the second inert gas supply pipeline and connected with the inert gas input end of the inert gas delivery control pipeline, and the output end of the inert gas delivery control pipeline is communicated with the inert gas surge tank (18); A pressurized bypass is further arranged on the bypass of the inert gas delivery control pipeline between the eighth control valve (19) and the tenth control valve (21), and a motor (24), a twelfth control valve (25) and an inert gas control tank (35) are arranged on the pressurized bypass, and the twelfth control valve (25) is arranged at the gas inlet end of the inert gas control tank (35).

2. The system for detecting the influence of laboratory-grade water quality on hydrogen production by electrolysis of water according to claim 1, characterized in that: The analysis and detection system comprises: A chromatograph (15) is communicated with the tank body (1) through a detection end hydrogen gas conduit, and a sixth control valve (14) is arranged on the detection end hydrogen gas conduit; a computer (16) is electrically connected with the chromatograph (15).

3. The use method of the laboratory grade water quality influence on hydrogen production by electrolysis of water detection system, which is realized by the laboratory grade water quality influence on hydrogen production by electrolysis of water detection system of claim 2, characterized in that: The method comprises the following steps: Step one: air tightness check Close all control valves of the system, open the sixteenth control valve (29) and the third control valve (8) to make the whole system pressure value 0.12 MPa, and pressurize for 30 minutes to observe the value change of the second pressure gauge (33); Step two: inert gas purging Close all control valves of the system, open the sixteenth control valve (29), the third control valve (8) and the seventh control valve (17) to purge the system, and the purging time is 5 minutes; then close the seventh control valve (17), the sixteenth control valve (29) and finally the third control valve (8); Step three: electrolytic hydrogen production Close all control valves of the system, open the second control valve (6) and the seventeenth control valve (36), open the first control valve (3) and the liquid pump (4), and input direct current and the liquid to be tested into the single electrolytic cell (5) to obtain hydrogen and oxygen through chemical reaction, the oxygen is discharged through the oxygen discharge pipeline, and the hydrogen is discharged through the seventeenth control valve (36) pipeline; Step four: sampling test At the same time, close the fourth control valve (9), open the third control valve (8), maintain for 1 minute, close the third control valve (8), open the fourth control valve (9), open the eleventh control valve (23) and the sixth control valve (14) at the same time, and blow the hydrogen sample into the chromatograph (15).

4. The use method of the laboratory grade water quality influence on hydrogen production by electrolysis of water detection system, which is realized by the laboratory grade water quality influence on hydrogen production by electrolysis of water detection system of claim 2, characterized in that: The method comprises the following steps: Step one: air tightness check Close all control valves of the system, open the sixteenth control valve (29) and the third control valve (8) at the same time, and maintain the pressure value of the whole system to be 0.12 MPa, and pressurize for 30 minutes, and observe the value change of the second pressure gauge (33); Step two: inert gas purging Close all control valves of the system, open the sixteenth control valve (29), the third control valve (8) and the seventh control valve (17) to purge the system, and the purging time is 5 minutes, then close the seventh control valve (17) and the sixteenth control valve (29) in sequence, and finally close the third control valve (8); Step three: electrolytic hydrogen production Close all control valves of the system, open the second control valve (6) and the seventeenth control valve (36) at the same time, open the first control valve (3) and the liquid pump (4), pass the direct current and the liquid to be tested into the single electrolytic cell (5), obtain hydrogen and oxygen through chemical reaction, discharge the oxygen through the oxygen discharge pipeline, and discharge the hydrogen through the seventeenth control valve (36) pipeline; Step four: hydrogen collection Open the fourth control valve (9) and the check valve (10), and hydrogen enters the hydrogen pressurizing cylinder (11), open the fifth control valve (12) and the fifteenth control valve (28), and the high-pressure inert gas pushes the piston (30) to press the hydrogen into the collection tank (13), and the piston (30) is reset due to the spring (31); Step five: sampling test At the same time, close the fourth control valve (9), open the third control valve (8), maintain for 1 minute, close the third control valve (8), open the fourth control valve (9), open the eleventh control valve (23) and the sixth control valve (14) at the same time, and blow the hydrogen sample into the chromatograph (15).

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