CN115747823A - Pure water electrolysis hydrogen production system - Google Patents

Abstract

The embodiment of the invention provides a pure water electrolytic hydrogen production system which comprises an electrolysis unit, a gas-water separation unit, a pure water tank and a water supplementing pipeline, wherein the inner cavity of the pure water tank comprises a first chamber and a second chamber which are separated, the first chamber is divided into a first sub-chamber and a second sub-chamber by a first partition piece with a plurality of first through holes, the second chamber is divided into a third sub-chamber and a fourth sub-chamber by a second partition piece with a plurality of second through holes, and the water supplementing pipeline is communicated with the first sub-chamber and the third sub-chamber. The pure water tank of the pure water electrolysis hydrogen production system in the embodiment of the invention is communicated with the electrolysis unit and the gas-water separation unit, the mixture of oxygen and water discharged by the electrolysis unit separates oxygen bubbles in water under the separation of the second separation member, and the mixture of hydrogen and water discharged by the gas-water separation unit separates hydrogen bubbles in water under the separation of the first separation member, so that the problems that a water pump generates cavitation and the hydrogen content in pure water is too high to influence the safe and stable operation of the electrolysis hydrogen production system are solved.

Description

Pure water electrolysis hydrogen production system

Technical Field

The invention relates to the technical field of hydrogen production systems, in particular to a pure water electrolysis hydrogen production system.

Background

The pure water electrolysis hydrogen production system obtains hydrogen by electrolyzing pure water. In the related art, the pure water in the pure water tank of the pure water electrolytic hydrogen production system has high gas content, gas is easy to be generated and is sucked into the water supply pump to cause cavitation of the water pump, and the hydrogen content in the pure water supplied to the electrolytic unit by the pure water tank is too high to influence the safe and stable operation of the electrolytic hydrogen production system.

Disclosure of Invention

The present invention is directed to solving, at least in part, one of the technical problems in the related art. To this end, embodiments of the present invention provide a pure water electrolytic hydrogen production system having an advantage of being able to separate pure water from gas through a pure water tank.

The pure water electrolysis hydrogen production system of the embodiment of the invention comprises:

an electrolysis unit for electrolyzing pure water and discharging a mixture of hydrogen and water and a mixture of oxygen and water;

the gas-water separation unit is used for receiving the mixture of the hydrogen and the water discharged by the electrolysis unit so as to separate the hydrogen and the water;

the inner cavity of the pure water tank comprises a first cavity and a second cavity which are separated, a first barrier piece is arranged in the first cavity, the first barrier piece divides the first cavity into a first sub-cavity and a second sub-cavity, a hydrogen vent communicated with the second sub-cavity is arranged on the cavity wall of the second sub-cavity, a plurality of first through holes are formed in the first barrier piece, the first through holes are communicated with the first sub-cavity and the second sub-cavity, a second barrier piece is arranged in the second cavity, the second barrier piece divides the second cavity into a third sub-cavity and a fourth sub-cavity, an oxygen vent communicated with the third sub-cavity is formed in the cavity wall of the third sub-cavity, a plurality of second through holes are formed in the second barrier piece, the second through holes are communicated with the third sub-cavity and the fourth sub-cavity, the electrolytic unit is communicated with the third sub-cavity to introduce a mixture of discharged oxygen into the third sub-cavity, the electrolytic unit is communicated with the fourth sub-cavity to receive pure water, the pure water is supplied to the fourth sub-cavity, and the electrolytic unit is communicated with the second sub-cavity to receive pure water, and the mixture of the pure water, and the pure water is communicated with the second sub-cavity to store the pure water and store the hydrogen discharge raw material;

the water supplementing pipeline is communicated with the first sub-cavity and the third sub-cavity and used for supplying pure water in the first sub-cavity into the third sub-cavity.

According to the pure water electrolytic hydrogen production system provided by the embodiment of the invention, the first barrier piece with the plurality of first through holes and the second barrier piece with the plurality of second through holes are arranged in the pure water tank, the mixture of oxygen and water discharged by the electrolysis unit can realize the separation of oxygen and water after entering the pure water tank, particularly the separation of oxygen bubbles in water under the barrier action of the second barrier piece, the mixture of hydrogen and water discharged by the gas-water separation unit can realize the separation of hydrogen and water after entering the pure water tank, particularly the separation of hydrogen bubbles in water under the barrier action of the first barrier piece, so that the problems that a water pump generates a cavitation phenomenon and the hydrogen content in pure water is too high to influence the safe and stable operation of the electrolytic hydrogen production system can be avoided.

In some embodiments, each of the first and second through-holes comprises a lower through-hole located below a lowest liquid level of the first or second chamber and an upper through-hole located above a highest liquid level of the first or second chamber.

In some embodiments, the pure water electrolytic hydrogen production system further comprises a water purifier assembly, the water purifier assembly comprises a water purifier water supply pipeline, a water purifier body and a water purifier water discharge pipeline which are sequentially communicated, the water purifier water supply pipeline is used for supplying raw material water to the water purifier body, the water purifier body is used for generating the raw material pure water from the raw material water, and the water purifier water discharge pipeline is communicated with the first sub-cavity to supply the raw material pure water to the first sub-cavity.

In some embodiments, the pure water electrolysis hydrogen production system further comprises a first heat exchanger, the first heat exchanger is provided with a first medium pipeline and a second medium pipeline, the mediums in the first medium pipeline and the second medium pipeline can exchange heat, the pure water machine water supply pipeline is communicated with the first medium pipeline, and the water replenishing pipeline is communicated with the second medium pipeline.

In some embodiments, the pure water electrolytic hydrogen production system further comprises a first control valve, wherein the first control valve comprises a first valve port, a second valve port and a third valve port, the first valve port is communicated with the first heat exchanger, the second valve port is communicated with the first sub-cavity, and the third valve port is communicated with the fourth sub-cavity, so that the first control valve can be used for regulating the on-off of the first sub-cavity and the first heat exchanger, and the on-off of the fourth sub-cavity and the first heat exchanger.

In some embodiments, a regulating pump is disposed on the water replenishing pipeline, a first temperature sensor is disposed on the water supply pipeline of the water purification machine, the first temperature sensor is located downstream of the first heat exchanger, the first temperature sensor is configured to acquire a temperature of raw water in the water supply pipeline of the water purification machine, and the first temperature sensor is electrically connected to the regulating pump to regulate a flow rate of the regulating pump according to the temperature acquired by the first temperature sensor.

In some embodiments, the pure water electrolytic hydrogen production system further includes a second control valve and a water supplement branch, a first cooler and an ion exchanger are disposed on the water supplement branch, the ion exchanger is used for reducing the conductivity of pure water in the water supplement branch, the second control valve includes a first interface, a second interface and a third interface, the first interface is communicated with the first heat exchanger, the second interface is communicated with the third sub-cavity through the water supplement branch, and the third interface is communicated with the third sub-cavity through the water supplement branch, so that the communication route of the first heat exchanger and the third sub-cavity is switched through the second control valve.

In some embodiments, the pure water electrolysis hydrogen production system further comprises an electrolysis water supply pipeline, the electrolysis water supply pipeline is provided with a conductivity tester and a second cooler, the fourth sub-cavity is communicated with the electrolysis unit through the electrolysis water supply pipeline, the conductivity tester is used for obtaining the conductivity of the pure water in the electrolysis water supply pipeline, and the second control valve is adjusted according to the obtained conductivity to control the opening and closing of the first heat exchanger and the water supplementing branch.

In some embodiments, the pure water electrolytic hydrogen production system further comprises a source of cooling medium;

the first cooler comprises a second heat exchanger which is respectively communicated with the cooling medium source and the water supplementing branch so as to be used for heat exchange between the cooling medium supplied by the cooling medium source and the pure water in the water supplementing branch; and/or

The second cooler comprises a third heat exchanger which is respectively communicated with the cooling medium source and the electrolysis water supply pipeline and is used for carrying out heat exchange on the cooling medium supplied by the cooling medium source and the pure water in the electrolysis water supply pipeline.

In some embodiments, a first regulating valve is arranged on a pipeline for supplying liquid to the first cooler, a second temperature sensor is arranged on the water supplementing branch, the second temperature sensor is located at the downstream of the first cooler, the second temperature sensor is used for acquiring the temperature of pure water in the water supplementing branch, and the second temperature sensor is electrically connected with the first regulating valve and used for regulating the flow of the first regulating valve according to the acquired temperature;

the cooling medium source is communicated with the second cooler and is used for supplying liquid to the second cooler, a second regulating valve is arranged on a pipeline, a third temperature sensor is arranged on the electrolysis water supply pipeline and is located at the downstream of the second cooler, the third temperature sensor is used for obtaining the temperature of pure water in the electrolysis water supply pipeline, and the third temperature sensor is electrically connected with the second regulating valve and is used for regulating the flow of the second regulating valve according to the obtained temperature.

In some embodiments, pure water electrolysis hydrogen manufacturing system still includes hydrogen purification unit, hydrogen purification unit with the gas-water separation unit passes through purification pipeline intercommunication to be used for receiving gas-water separation unit exhaust hydrogen, be equipped with third governing valve and pressure transmitter on the purification pipeline, pressure transmitter is used for acquireing hydrogen pressure in the purification pipeline, the third governing valve with pressure transmitter electricity is connected in order to be based on hydrogen pressure that pressure transmitter acquireed adjusts hydrogen pressure in the purification pipeline.

Drawings

FIG. 1 is a schematic diagram of a pure water electrolytic hydrogen production system according to an embodiment of the present invention;

FIG. 2 is a top view of the deionized water tank of FIG. 1;

fig. 3 is a front sectional view of the deionized water tank of fig. 1.

Reference numerals:

1. an electrolysis unit; 2. a gas-water separation unit; 3. a pure water tank; 301. a first chamber; 3011. a first sub-cavity; 3012. a second subchamber; 302. a second chamber; 3021. a third sub-cavity; 3022. a fourth subchamber; 303. a first barrier; 304. a second barrier; 305. a hydrogen vent; 306. an oxygen vent; 4. a water replenishing pipeline; 401. adjusting the pump; 5. a water purifier component; 501. a water supply pipeline of the water purifier; 5011. a first temperature sensor; 502. a water purifier body; 503. a water discharge pipeline of the water purifier; 6. a first heat exchanger; 7. a first control valve; 8. a second control valve; 9. a first cooler; 10. an ion exchanger; 11. a conductivity meter; 12. a second cooler; 13. a first regulating valve; 14. a second temperature sensor; 15. a second regulating valve; 16. a third temperature sensor; 17. a hydrogen purification unit; 18. a third regulating valve; 19. a pressure transmitter; 20. and a water supply pump.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A system for producing hydrogen by electrolyzing pure water according to an embodiment of the present invention will be described with reference to fig. 1 to 3.

As shown in fig. 1 to 3, the pure water electrolytic hydrogen production system according to the embodiment of the present invention includes an electrolysis unit 1, a gas-water separation unit 2, a pure water tank 3, and a water supply line 4. The electrolysis unit 1 is used for electrolyzing pure water and discharging a mixture of hydrogen and water and a mixture of oxygen and water, and the gas-water separation unit 2 is used for receiving the mixture of hydrogen and water discharged by the electrolysis unit 1 to separate hydrogen and water. Specifically, the electrolysis unit 1 includes an electrolysis cell, and the gas-water separation unit 2 includes a gas-water separator.

The inner cavity of the pure water box 3 comprises a first cavity 301 and a second cavity 302 which are separated, a first barrier member 303 is arranged in the first cavity 301, the first barrier member 303 divides the first cavity 301 into a first sub-cavity 3011 and a second sub-cavity 3012, a hydrogen vent 305 communicated with the second sub-cavity 3012 is arranged on the cavity wall of the second sub-cavity 3012, a plurality of first through holes are formed in the first barrier member 303, the first through holes are communicated with the first sub-cavity 3011 and the second sub-cavity 3012, a second barrier member 304 is arranged in the second cavity 302, the second barrier member 304 divides the second cavity 302 into a third sub-cavity 3021 and a fourth sub-cavity 3022, an oxygen vent 306 communicated with the third sub-cavity 3021 is arranged on the cavity wall of the third sub-cavity 3021, the second barrier member 304 is provided with a plurality of second through holes, the second through holes are communicated with the third sub-cavity 3021 and the fourth sub-cavity 3022, the electrolysis unit 1 is communicated with the third sub-cavity 3021 to receive a mixture of the discharged oxygen and water, the fourth sub-cavity 3022, pure water is communicated with the hydrogen discharge unit 3022, and pure water is received by the pure water receiving unit, and pure water receiving pure water is communicated with the pure water receiving unit 3011 and is communicated with the fourth sub-cavity 3022.

Specifically, as shown in fig. 1 to fig. 3, the inner cavity of the deionized water tank 3 includes a first chamber 301 and a second chamber 302 which are separated, the first chamber 301 and the second chamber 302 are respectively independent closed spaces, the first chamber 301 is located on the right side, the second chamber 302 is located on the left side, the first chamber 301 and the second chamber 302 are not communicated with each other inside the deionized water tank 3, the first blocking member 303 is transversely disposed in the first chamber 301 and divides the first chamber 301 into a first sub-chamber 3011 and a second sub-chamber 3012, the first sub-chamber 3011 and the second sub-chamber 3012 are disposed side by side in the horizontal direction, the first blocking member 303 is provided with a plurality of first through holes which penetrate through the first blocking member 303 along the arrangement direction of the first sub-chamber 3011 and the second sub-chamber 3012, so that the first sub-chamber 3011 and the second sub-chamber 3012 are communicated with each other through the plurality of first through holes, the hydrogen vent 305 is arranged on the cavity wall of the second sub-cavity 3012, the hydrogen vent 305 is located above the highest liquid level of the second sub-cavity 3012, the second blocking member 304 is transversely arranged in the second cavity 302 and divides the second cavity 302 into a third sub-cavity 3021 and a fourth sub-cavity 3022, the third sub-cavity 3021 and the fourth sub-cavity 3022 are arranged side by side in the horizontal direction, a plurality of second through holes penetrating through the second blocking member 304 along the arrangement direction of the third sub-cavity 3021 and the fourth sub-cavity 3022 are arranged on the second blocking member 304, so that the third sub-cavity 3021 and the fourth sub-cavity 3022 are communicated through the plurality of second through holes, the oxygen vent 306 is arranged on the cavity wall of the third sub-cavity 3021, and the oxygen vent 306 is located above the highest liquid level of the third sub-cavity 3021.

It is understood that the number of the first blocking members 303 and the second blocking members 304 is not limited to one, and in other embodiments, a plurality of the first blocking members 303 are arranged at intervals along the arrangement direction of the first sub-cavity 3011 and the second sub-cavity 3012, and a plurality of the second blocking members 304 are arranged at intervals along the arrangement direction of the third sub-cavity 3021 and the fourth sub-cavity 3022.

The water replenishing pipeline 4 is communicated with the first sub-cavity 3011 and the third sub-cavity 3021 so as to be used for supplying pure water in the first sub-cavity 3011 into the third sub-cavity 3021.

When the pure water electrolytic hydrogen production system is in operation, raw pure water is supplied into the first sub-cavity 3011 and stored, pure water in the first sub-cavity 3011 is supplied into the third sub-cavity 3021 through the water replenishing pipeline 4, pure water in the third sub-cavity 3021 enters the fourth sub-cavity 3022 through the plurality of second through holes, pure water in the fourth sub-cavity 3022 is supplied into the electrolysis unit 1 under the power of the water supply pump 20 for electrolysis, and a mixture of hydrogen and water and a mixture of oxygen and water are generated, wherein the mixture of oxygen and water flows back into the third sub-cavity 3021 through the pipeline, and is separated from oxygen and water under the action of gravity, oxygen separated from the third sub-cavity 3021 is discharged out of the pure water tank through the oxygen outlet 306, but at this time, the separated water still has more oxygen bubbles, so that more oxygen bubbles are mixed in the pure water in the third sub-cavity 3021, pure water in the third sub-cavity 3021 is discharged into the fourth sub-cavity 3022 through the second through holes, the second blocking piece 304 and the second through holes have a blocking effect of blocking oxygen bubbles, so that the oxygen bubbles in the fourth sub-cavity 3022 cannot enter the fourth sub-cavity 3022, and the fourth sub-cavity 3022, thereby preventing the pure water supply pump 3022 from generating corrosion phenomenon.

The mixture of hydrogen and water generated by the electrolysis unit 1 enters the gas-water separation unit 2 to separate the hydrogen and the water, then the separated water flows back to the second sub-cavity 3012, the second sub-cavity 3012 is communicated with the atmosphere through the hydrogen vent 305 so that the second sub-cavity 3012 has normal pressure in the atmospheric environment, the water with hydrogen bubbles generated by the gas-water separation unit 2 is in a high-pressure state of 1-3 MPa, when the water with the hydrogen bubbles enters the second sub-cavity 3012, pressure is released in the second sub-cavity 3012, so that the hydrogen and the water are separated, and the hydrogen separated from the second sub-cavity 3012 is discharged through the hydrogen vent 305. But still have more hydrogen bubble in the water of backward flow, in second sub-chamber 3012, the hydrogen bubble of aquatic can separate with water, at the water of backward flow simultaneously with the second sub-chamber 3012 in original pure water mix and to the in-process that first sub-chamber 3011 flows, first separation piece 303 and first through-hole have the separation effect to the hydrogen bubble of aquatic, make the hydrogen bubble separation in second sub-chamber 3012 and can't get into in first sub-chamber 3011, thereby avoid getting into second chamber 302 and electrolysis unit 1's pure water has the too high problem of hydrogen content.

Therefore, in the pure water electrolytic hydrogen production system of the embodiment of the invention, the first barrier member with the plurality of first through holes and the second barrier member with the plurality of second through holes are arranged in the pure water tank, so that the mixture of oxygen and water discharged by the electrolysis unit can realize the separation of oxygen and water in the pure water tank, especially the separation of oxygen bubbles in water under the barrier action of the second barrier member, the mixture of hydrogen and water discharged by the gas-water separation unit can realize the separation of hydrogen and water in the pure water tank, especially the separation of hydrogen bubbles in water under the barrier action of the first barrier member, and therefore, the problems that the cavitation phenomenon of a water pump occurs and the safe and stable operation of the electrolytic hydrogen production system is influenced by the overhigh hydrogen content in pure water can be avoided.

In some embodiments, each of the first and second through holes comprises a lower through hole 3031 and an upper through hole 3032, the lower through hole 3031 being located below the lowest liquid level of the first or second chamber 301 or 302, and the upper through hole 3032 being located above the highest liquid level of the first or second chamber 301 or 302.

As shown in fig. 2 and 3, the first blocking member 303 and the second blocking member 304 respectively extend from top to bottom to the bottom surface of the deionized water tank 3 along the vertical direction, each of the first through hole and the second through hole includes a lower through hole 3031 and an upper through hole 3032, the plurality of upper through holes 3032 are arranged at intervals above the highest liquid level of the first chamber 301 or the second chamber 302, the plurality of upper through holes 3032 on the first blocking member 303 are used for balancing the air pressure in the first sub-chamber 3011 and the second sub-chamber 3012, the plurality of upper through holes 3032 on the second blocking member 304 are used for balancing the air pressure in the third sub-chamber 3021 and the fourth sub-chamber 3022, the plurality of lower through holes 3031 on the first blocking member 303 are located below the lowest liquid level of the first chamber 301 or the second chamber 302, the plurality of lower through holes 3031 on the first blocking member 303 are used for pure water to flow between the first sub-chamber 3011 and the second sub-chamber 3012 and play a role of blocking pure water bubbles in hydrogen gas flow between the third sub-chamber 3021 and the fourth sub-chamber 3012, and blocking pure water. Since the plurality of upper through holes 3032 are located above the highest liquid level and the plurality of lower through holes 3031 are located below the lowest liquid level, the plurality of upper through holes 3032 and the plurality of lower through holes 3031 are spaced apart from each other by a predetermined distance in the up-down direction.

It is understood that the first through holes and the second through holes are not limited to be divided into lower through holes and upper through holes which are arranged at intervals, and in other embodiments, a plurality of first through holes are uniformly distributed on the first blocking member, and a plurality of second through holes are uniformly distributed on the second blocking member.

In some embodiments, the pure water electrolytic hydrogen production system according to the embodiment of the present invention further includes a water purifier assembly 5, the water purifier assembly 5 includes a water purifier water supply line 501, a water purifier body 502, and a water purifier water discharge line 503, which are sequentially connected, the water purifier water supply line 501 is configured to supply raw material water to the water purifier body 502, the water purifier body 502 is configured to generate raw material pure water from the raw material water, and the water purifier water discharge line 503 is connected to the first sub-chamber 3011 to supply raw material pure water to the first sub-chamber 3011.

As shown in fig. 1, a water purifier module 5 is disposed upstream of the first sub-chamber 3011, the water purifier module 5 includes a water purifier water supply line 501, a water purifier body 502, and a water purifier water discharge line 503 which are sequentially communicated, the water purifier water supply line 501 is communicated with a tap water source for supplying tap water into the water purifier body 502, and the water purifier body 502 converts the tap water into pure water and supplies the pure water as raw material pure water into the first sub-chamber 3011 through the water purifier water discharge line 503.

In other embodiments, the pure water electrolytic hydrogen production system may not have a pure water machine component, and a pure water tank for storing pure water is provided upstream of the first sub-chamber, and raw pure water is supplied to the first sub-chamber through the pure water tank.

In some embodiments, the pure water electrolysis hydrogen production system according to the embodiments of the present invention further includes a first heat exchanger 6, where the first heat exchanger 6 has a first medium pipeline and a second medium pipeline, the mediums in the first medium pipeline and the second medium pipeline can exchange heat, the water supply pipeline 501 of the pure water machine is communicated with the first medium pipeline, and the water supplement pipeline 4 is communicated with the second medium pipeline.

As shown in FIG. 1, the first medium pipeline of the first heat exchanger 6 is connected to the water supply pipeline 501 of the water purification machine and located at the upstream of the water purification machine body 502, the second medium pipeline of the first heat exchanger 6 is connected to the water supply pipeline 4, the operating temperature of the electrolytic tank of the electrolytic unit 1 is 70 ℃ -80 ℃, so that the pure water in the water purification tank 3 which forms a water circulation with the electrolytic unit 1 has a certain temperature, the temperature of the tap water in the water supply pipeline 501 of the water purification machine is 5 ℃ -18 ℃, but the temperature of the optimal operating condition of the water purification machine body 502 is 22 ℃ -28 ℃, so that the first heat exchanger 6 can exchange heat with the tap water in the water supply pipeline 501 through the pure water in the water supply pipeline 4 to make the temperature of the tap water entering the water purification machine body 502 be 22 ℃ -28 ℃, thereby making the water purification machine body 502 work under the optimal operating condition. The first heat exchanger 6 is preferably a plate heat exchanger.

Of course, the first heat exchanger 6 can be started or stopped according to the operation requirement of the pure water electrolysis hydrogen production system.

It is understood that in other embodiments, the pure water electrolytic hydrogen production system may not have the first heat exchanger 6.

In some embodiments, the pure water electrolytic hydrogen production system of the embodiment of the present invention further includes a first control valve 7, where the first control valve 7 includes a first valve port, a second valve port and a third valve port, the first valve port is communicated with the first heat exchanger 6, the second valve port is communicated with the first sub-chamber 3011, the third valve port is communicated with the fourth sub-chamber 3022, so as to adjust the on-off of the first sub-chamber 3011 and the first heat exchanger 6, and the on-off of the fourth sub-chamber 3022 and the first heat exchanger 6 through the first control valve 7.

As shown in fig. 1, the first port is a port a of the first control valve 7, the first port is communicated with the second medium pipeline of the first heat exchanger 6 through a water supplement pipeline 4, the second port is a port B of the first control valve 7, the second port is communicated with the first sub-chamber 3011 through the water supplement pipeline 4, the third port is a port C of the first control valve 7, and the third port is communicated with the fourth sub-chamber 3022 through a pipeline.

When the first control valve 7 opens the a-B circuit, the pure water in the first sub-chamber 3011 is supplied to the third sub-chamber 3021 to replenish water, and when the first heat exchanger 6 is in an open state, the pure water discharged into the water replenishing pipeline 4 through the first sub-chamber 3011 raises the temperature of the tap water in the water supply pipeline 501 of the water purification machine. When the first control valve 7 opens the a-C circuit, pure water in the fourth sub-chamber 3022 is supplied to the water replenishing pipe 4 and then supplied to the third sub-chamber 3021 for replenishing water, and when the first heat exchanger 6 is in an open state, pure water discharged into the water replenishing pipe 4 through the fourth sub-chamber 3022 heats up tap water in the water supply pipe 501 of the water purification machine.

In some embodiments, the adjusting pump 401 is disposed on the water replenishing pipeline 4, the first temperature sensor 5011 is disposed on the water supply pipeline 501 of the water purification machine, the first temperature sensor 5011 is located downstream of the first heat exchanger 6, the first temperature sensor 5011 is used for acquiring the temperature of the raw water in the water supply pipeline 501 of the water purification machine, and the first temperature sensor 5011 is electrically connected with the adjusting pump 401 to adjust the flow rate of the adjusting pump 401 according to the temperature acquired by the first temperature sensor 5011.

As shown in fig. 1, the water replenishing pipeline 4 is provided with an adjusting pump 401 to pump the pure water in the first sub-cavity 3011 or the pure water in the fourth sub-cavity 3022 into the third sub-cavity 3021 through the adjusting pump 401, the water supply pipeline 501 of the water purification machine is provided with a first temperature sensor 5011 located at the downstream of the first heat exchanger 6 to obtain the temperature of the tap water heated by the first heat exchanger 6 in the water supply pipeline 501 of the water purification machine, the first temperature sensor 5011 is electrically connected with the adjusting pump 401 to adjust the flow rate of the adjusting pump 401 according to the temperature obtained by the first temperature sensor 5011, so that the temperature of the tap water heated in the water supply pipeline 501 of the water purification machine is 22 ℃ to 28 ℃, preferably 25 ℃, and the temperature of the tap water is prevented from being out of the temperature range of the optimal operating condition of the water purification machine body 502. The conditioning pump 401 is preferably a variable frequency circulation pump having multiple operating frequencies. The first temperature sensor 5011 is preferably a thermocouple.

It is understood that the pure water electrolytic hydrogen production system may not have the first temperature sensor and the regulating pump, and in other implementations, the temperature of the tap water in the water supply line of the water purification machine after being heated is 22-28 ℃ by setting the flow rate of the pure water in the water supply line and the flow rate of the tap water in the water supply line of the water purification machine.

In some embodiments, the pure water electrolytic hydrogen production system of the embodiment of the present invention further includes a second control valve 8 and a water replenishing branch, the first cooler 9 and the ion exchanger 10 are disposed on the water replenishing branch, the ion exchanger 10 is used for reducing the conductivity of pure water in the water replenishing branch, the second control valve 8 includes a first interface, a second interface and a third interface, the first interface is communicated with the first heat exchanger 6, the second interface is communicated with the third sub-chamber 3021 through the water replenishing pipeline 4, and the third interface is communicated with the third sub-chamber 3021 through the water replenishing branch, so as to switch the communication route of the first heat exchanger 6 and the third sub-chamber 3021 through the second control valve 8.

As shown in fig. 1, the first port is a port a of the illustrated second control valve 8, the first port is communicated with the second medium pipeline of the first heat exchanger 6 through the water replenishing pipeline 4, the second port is a port B of the illustrated second control valve 8, the second port is communicated with the third sub-chamber 3021 through the water replenishing pipeline 4, the third port is a port C of the illustrated second control valve 8, the third port is communicated with the third sub-chamber 3021 through a water replenishing branch, the water replenishing branch is provided with a first cooler 9 and an ion exchanger 10, the ion exchanger 10 is used for reducing the conductivity of pure water in the water replenishing branch to reduce the conductivity of pure water in the second chamber 302, so that the conductivity of pure water supplied to the electrolysis unit 1 meets the requirement, and the first cooler 9 is used for reducing the water temperature of pure water supplied to the ion exchanger 10 to meet the requirement of the water temperature of the ion exchanger 10.

When the second control valve 8 opens the a-B loop, pure water in the first sub-cavity 3011 or pure water in the fourth sub-cavity 3022 enters the third sub-cavity 3021 through the water replenishing pipeline 4 to replenish water to the third sub-cavity 3021. When the second control valve 8 opens the a-C circuit, pure water in the first sub-chamber 3011 or pure water in the fourth sub-chamber 3022 enters the third sub-chamber 3021 through the water replenishment branch, and the conductivity of the pure water is lowered after passing through the ion exchanger 10. Preferably, the first control valve 7 opens the a-C circuit when the second control valve 8 opens the a-C circuit, which is used to circulate the third sub-chamber 3021 and the fourth sub-chamber 3022 through the water replenishment branch having the ion exchanger 10 when the conductivity of the pure water in the second chamber 302 is higher than the demand of the electrolysis unit 1, and to reduce the conductivity of the pure water during the circulation to reduce the conductivity of the pure water in the second chamber 302.

The ion exchanger is arranged on the water supplementing branch, on one hand, the opening and closing of the ion exchanger can be regulated and controlled through the opening and closing of the water supplementing branch, on the other hand, the flow processed by the ion exchanger is small, and the ion exchange load of the ion exchanger and the cooling load of the first cooler can be reduced.

It is to be understood that the pure water electrolytic hydrogen production system is not limited to having a make-up water branch, and in other embodiments, an ion exchanger is provided on the make-up water branch.

In some embodiments, the pure water electrolysis hydrogen production system of the embodiment of the present invention further includes an electrolysis water supply pipeline, the electrolysis water supply pipeline is provided with a conductivity meter 11 and a second cooler 12, the fourth sub-cavity 3022 is communicated with the electrolysis unit 1 through the electrolysis water supply pipeline, the conductivity meter 11 is configured to obtain the conductivity of the pure water in the electrolysis water supply pipeline, and adjust the second control valve 8 according to the obtained conductivity to control the opening and closing of the first heat exchanger 6 and the water replenishing branch.

As shown in fig. 1, the fourth sub-chamber 3022 is communicated with the electrolytic unit 1 through an electrolytic water supply pipeline, a water supply pump 20, a conductivity meter 11 and a second cooler 12 are arranged on the electrolytic water supply pipeline, the water supply pump 20 is used for pumping the pure water in the fourth sub-chamber 3022 into the electrolytic unit 1, the conductivity meter 11 is used for obtaining the conductivity of the pure water in the electrolytic water supply pipeline to know whether the conductivity of the pure water supplied to the electrolytic unit 1 meets the requirement of the electrolytic unit 1, when the conductivity of the pure water in the electrolytic unit 1 exceeds the conductivity requirement value of the electrolytic unit 1, the first control valve 7 opens the a-C loop when the second control valve 8 opens the a-C loop, and the conductivity of the pure water in the second chamber 302 is reduced through the water supply branch with the ion exchanger 10, so that the conductivity of the pure water supplied to the electrolytic unit 1 by the fourth sub-chamber 3022 meets the requirement of the electrolytic unit 1. The second cooler 12 is used to reduce the water temperature of the pure water fed into the electrolysis unit 1 to meet the water temperature requirement of the electrolysis unit 1.

It will be appreciated that in other embodiments, a conductivity meter may also be provided on the pure water tank to obtain the conductivity of the pure water in the second chamber.

In other embodiments, a pure water electrolytic hydrogen production system of embodiments of the present invention further comprises a source of cooling medium. Specifically, the cooling medium source is preferably an air-cooled chiller, and may also be a tap water source, or a storage device storing cooling water.

The first cooler 9 comprises a second heat exchanger which is respectively communicated with the cooling medium source and the water replenishing branch for heat exchange between the cooling medium supplied by the cooling medium source and the pure water in the water replenishing branch. Specifically, as shown in fig. 1, the first cooler 9 includes a second heat exchanger, and the second heat exchanger is respectively communicated with the cooling medium source and the water replenishing branch, so as to cool down the pure water in the water replenishing branch by the cooling medium introduced into the second heat exchanger through the cooling medium source. The second heat exchanger is preferably a plate heat exchanger.

The second cooler 12 includes a third heat exchanger that is in communication with the cooling medium source and the electrolytic water supply line, respectively, for heat exchange of the cooling medium supplied from the cooling medium source with the pure water in the electrolytic water supply line. Specifically, as shown in fig. 1, the second cooler 12 includes a third heat exchanger, and the third heat exchanger is respectively communicated with the cooling medium source and the electrolyzed water supply pipeline, so that the cooling medium introduced into the third heat exchanger through the cooling medium source can cool the pure water in the electrolyzed water supply pipeline. The third heat exchanger is preferably a plate heat exchanger.

The energy consumption of the cooling work can be effectively reduced by respectively cooling the corresponding water supplementing branch and the electrolysis water supply pipeline in a heat exchange mode through the second heat exchanger and the third heat exchanger.

It is understood that in other embodiments, both the first cooler and the second cooler may employ air-cooled coolers, or one of the first cooler and the second cooler may employ air-cooled coolers and the other may employ heat exchangers.

In some embodiments, a first regulating valve 13 is disposed on a pipeline of the cooling medium source, which is communicated with the first cooler 9 and used for supplying liquid to the first cooler 9, a second temperature sensor 14 is disposed on the water replenishing branch, the second temperature sensor 14 is located downstream of the first cooler 9, the second temperature sensor 14 is used for acquiring the temperature of pure water in the water replenishing branch, and the second temperature sensor 14 is electrically connected with the first regulating valve 13 and used for regulating the flow rate of the first regulating valve 13 according to the acquired temperature.

Specifically, as shown in fig. 1, a first regulating valve 13 is disposed on a pipeline through which the cooling medium source supplies liquid to the first cooler 9, a second temperature sensor 14 is disposed on the water replenishing branch, the second temperature sensor 14 is located at the downstream of the first cooler 9, the temperature of the pure water cooled by the second heat exchanger in the water replenishing branch is obtained through the second temperature sensor 14, and the opening degree of the first regulating valve 13 is regulated and controlled through the temperature obtained by the second temperature sensor 14, so as to regulate and control the flow rate of the cooling medium source supplied to the second heat exchanger, so that the temperature of the pure water cooled by the second heat exchanger in the water replenishing branch is kept stable and meets the requirements of the ion exchanger 10. The second temperature sensor 14 is preferably a thermocouple. The first regulating valve 13 is preferably a pneumatic regulating valve.

The cooling medium source is communicated with the second cooler 12 and is provided with a second regulating valve 15 on a pipeline for supplying liquid to the second cooler 12, a third temperature sensor 16 is arranged on the electrolysis water supply pipeline, the third temperature sensor 16 is positioned at the downstream of the second cooler 12, the third temperature sensor 16 is used for acquiring the temperature of pure water in the electrolysis water supply pipeline, and the third temperature sensor 16 is electrically connected with the second regulating valve 15 and is used for regulating the flow of the second regulating valve 15 according to the acquired temperature.

Specifically, as shown in fig. 1, a second regulating valve 15 is disposed on a pipeline for supplying the cooling medium source to the second cooler 12, a third temperature sensor 16 is disposed on the electrolytic water supply pipeline, the third temperature sensor 16 is located at the downstream of the second cooler 12, the temperature of the pure water cooled by the third heat exchanger in the electrolytic water supply pipeline is obtained by the third temperature sensor 16, and the opening degree of the second regulating valve 15 is regulated by the temperature obtained by the third temperature sensor 16, so as to regulate the flow rate of the cooling medium source supplied to the third heat exchanger, so that the temperature of the pure water cooled by the third heat exchanger in the electrolytic water supply pipeline is kept stable and meets the requirement of the electrolysis unit 1. The third temperature sensor 16 is preferably a thermocouple. The second regulating valve 15 is preferably a pneumatic regulating valve.

In some embodiments, the pure water electrolysis hydrogen production system of the embodiment of the invention further includes a hydrogen purification unit 17, the hydrogen purification unit 17 is communicated with the gas-water separation unit 2 through a purification pipeline to receive hydrogen discharged by the gas-water separation unit 2, a third regulating valve 18 and a pressure transmitter 19 are arranged on the purification pipeline, the pressure transmitter 19 is used for acquiring hydrogen pressure in the purification pipeline, and the third regulating valve 18 and the pressure transmitter 19 are electrically connected to adjust hydrogen pressure in the purification pipeline according to the hydrogen pressure acquired by the pressure transmitter 19.

As shown in fig. 1, hydrogen discharged from the gas-water separation unit 2 is fed into the hydrogen purification unit 17 through a purification pipeline to perform hydrogen purification, a third regulating valve 18 and a pressure transmitter 19 are arranged on the purification pipeline, the pressure transmitter 19 is used for acquiring hydrogen pressure in the purification pipeline, the third regulating valve 18 and the pressure transmitter 19 are electrically connected to adjust the hydrogen pressure in the purification pipeline according to the hydrogen pressure acquired by the pressure transmitter 19, and the hydrogen discharged from the gas-water separation unit 2 enters the hydrogen purification unit 17 after the pressure in the purification pipeline is adjusted by the third regulating valve 18 and the pressure transmitter 19 in a linkage manner before entering the hydrogen purification unit 17, so as to meet the pressure requirement of the hydrogen purification unit 17. The hydrogen purification unit 17 preferably comprises a drying tower and a detector, the hydrogen purification unit 17 is provided with a qualified gas outlet and an unqualified gas outlet, the purified hydrogen detected by the detector is discharged from the qualified gas outlet for use or stored, and the purified hydrogen detected by the detector is discharged from the unqualified gas outlet. The third regulator valve 18 is preferably a pneumatic regulator valve.

In some embodiments, the conditioning pump 401 has a first frequency, a second frequency, a third frequency, a fourth frequency and a fifth frequency when operating, wherein the first frequency corresponds to a flow rate required for water replenishing of the second chamber 302, a range from the second frequency to the third frequency corresponds to a flow rate required for heat exchange of the first heat exchanger, the fourth frequency corresponds to a flow rate required for operation of the ion exchanger 10, the fifth frequency is a lower limit of an operating frequency of the conditioning pump 401, and the fifth frequency corresponds to a flow rate required by the pure water electrolytic hydrogen production system when there is no water replenishing, no heat exchange of the first heat exchanger 6, and no functional requirement of the ion exchanger to reduce the conductivity. Preferably, the fifth frequency is greater than the first frequency and less than the second frequency and less than the third frequency, the magnitude of the fourth frequency is selected according to the operation condition of the ion exchanger 10, and the fourth frequency is greater than or equal to the first frequency.

The pure water electrolysis hydrogen production system provided by the embodiment of the invention is suitable for a differential pressure type hydrogen production system so as to avoid ultrahigh hydrogen content in oxygen caused by partial dissolved hydrogen in return water on the hydrogen side, and the differential pressure type hydrogen production system can safely operate.

The pure water electrolytic hydrogen production system of the embodiment of the invention has the following use states:

the first use state: the water supply line 501 of the water purification machine is not supplied with tap water as a raw material, the water supply line 501 of the water purification machine stops supplying water to the water purification machine body 502, the first control valve 7 opens the a-B circuit, the second control valve 8 opens the a-B circuit, and the adjusting pump 401 is set at the first frequency. At this time, the pure water in the first sub-cavity 3011 is supplied to the third sub-cavity 3021 through the water replenishing pipeline 4 to replenish the water to the second chamber 302, and the heat of the pure water in the water replenishing pipeline 4 is naturally dissipated at the first heat exchanger 6.

The second use state: the water supply pipeline 501 of the water purification machine supplies water to the water purification machine body 502, the first control valve 7 opens the A-B loop, the second control valve 8 opens the A-B loop, and the adjusting pump 401 is adjusted between a second frequency and a third frequency under the regulation of the first temperature sensor 5011, wherein the second frequency is greater than or equal to the first frequency, and the third frequency is greater than the second frequency. At this time, the pure water in the first sub-cavity 3011 is supplied to the third sub-cavity 3021 through the water replenishing pipeline 4 to replenish the water in the second sub-cavity 302, and meanwhile, the pure water in the water replenishing pipeline 4 exchanges heat with the pure water in the water supply pipeline 501 of the water purifier at the first heat exchanger 6, so that the temperature of the tap water entering the water purifier body 502 is 22-28 ℃, preferably 25 ℃, and the frequency of the pump 401 is adjusted to enable the water flow in the water replenishing pipeline 4 to meet the heat exchange requirement and meet the water replenishing requirement.

The third use state: the water supply pipeline 501 of the water purification machine supplies water to the water purification machine body 502, the first control valve 7 opens the A-B loop, the second control valve 8 opens the A-C loop, and the adjusting pump 401 adjusts between the second frequency and the third frequency under the regulation of the first temperature sensor 5011. At this time, the pure water in the first sub-chamber 3011 is supplied to the water replenishing branch via the water replenishing pipeline 4, and enters the third sub-chamber 3021 after the conductivity of the pure water is reduced at the ion exchanger 10 on the water replenishing branch, so as to replenish the second chamber 302, and meanwhile, the pure water in the water replenishing pipeline 4 exchanges heat with the pure water in the water supply pipeline 501 of the water purifying machine at the first heat exchanger 6. On the water supply pipeline 4, the first regulating valve 13 and the second temperature sensor 14 are matched to realize the water temperature regulation of the pure water entering the ion exchanger 10 by controlling the flow of the cooling water entering the first cooler 9, and meanwhile, because the upper stream of the first cooler 9 is cooled down to the pure water through the first heat exchanger 6, the heat exchange quantity of the second heat exchanger in the first cooler 9 is greatly reduced, and the energy consumption of a pure water electrolysis hydrogen production system can be effectively reduced.

The fourth use state: the water supply pipeline 501 of the water purification machine supplies water to the water purification machine body 502, the first control valve 7 opens the A-C loop, the second control valve 8 opens the A-B loop, and the adjusting pump 401 adjusts between the second frequency and the third frequency under the regulation of the first temperature sensor 5011. At this time, the pure water in the fourth sub-chamber 3022 is supplied to the third sub-chamber 3021 through the water replenishing pipeline 4, and the pure water in the water replenishing pipeline 4 exchanges heat with the pure water in the water supply pipeline 501 of the water purification machine at the first heat exchanger 6, so that the temperature of the tap water entering the water purification machine body 502 is 22 ℃ to 28 ℃, preferably 25 ℃, and the temperature of the pure water in the second chamber 302 can be reduced, thereby reducing the energy consumption of the second cooler 12 and the pure water electrolysis hydrogen production system.

A fifth use state: the water supply pipeline 501 of the water purification machine supplies water to the water purification machine body 502, the first control valve 7 opens the A-C loop, the second control valve 8 opens the A-C loop, and the adjusting pump 401 adjusts between the second frequency and the third frequency under the regulation of the first temperature sensor 5011. At this time, the pure water in the fourth sub-chamber 3022 is supplied to the water replenishing branch through the water replenishing pipeline 4, and enters the third sub-chamber 3021 after the conductivity of the ion exchanger 10 on the water replenishing branch is reduced, and meanwhile, the pure water in the water replenishing pipeline 4 exchanges heat with the pure water in the water supplying pipeline 501 of the water purifying machine at the first heat exchanger 6.

Sixth use state: the water supply line 501 of the water purification machine is not supplied with tap water as the raw material water, the water supply line 501 of the water purification machine stops supplying water to the water purification machine body 502, the first control valve 7 opens the a-C circuit, the second control valve 8 opens the a-C circuit, and the adjusting pump 401 is at the fourth frequency. At this time, the pure water in the fourth sub-chamber 3022 is supplied to the water replenishing branch through the water replenishing pipeline 4, the conductivity of the pure water is reduced at the ion exchanger 10 on the water replenishing branch, and then the pure water enters the third sub-chamber 3021, and the pure water in the water replenishing pipeline 4 naturally dissipates heat at the first heat exchanger 6.

Seventh use state: the water supply line 501 of the water purification machine is not supplied with tap water as the raw material water, the water supply line 501 of the water purification machine stops supplying water to the water purification machine body 502, the first control valve 7 opens the a-B circuit, the second control valve 8 opens the a-C circuit, and the adjusting pump 401 is at the fourth frequency which is equal to or higher than the first frequency. At this time, the pure water in the first sub-chamber 3011 is supplied to the water replenishing branch through the water replenishing pipeline 4, the conductivity of the pure water is reduced at the ion exchanger 10 on the water replenishing branch, and then the pure water enters the third sub-chamber 3021, and the pure water in the water replenishing pipeline 4 naturally dissipates heat at the first heat exchanger 6.

Eighth use state: the water supply line 501 of the water purification machine is not supplied with tap water as raw material water, the water supply line 501 of the water purification machine stops supplying water to the water purification machine body 502, the first control valve 7 opens the a-C loop, the second control valve 8 opens the a-B loop, the adjusting pump 401 is at a fifth frequency, and the fifth frequency is the lower limit of the operating frequency of the adjusting pump 401. At this time, the pure water in the fourth sub-chamber 3022 is supplied to the third sub-chamber 3021 through the water replenishing pipeline 4 to circulate, so that frequent start and stop of the regulating pump 401 are avoided, and the regulating pump 401 operates at the fifth frequency to reduce the energy consumption of the regulating pump 401 when the pure water electrolytic hydrogen production system has no water replenishing, no heat exchange of the first heat exchanger 6 and no ion exchanger to reduce the functional requirements of conductivity.

Preferably, the eight states of use can be automatically switched by the controller receiving and monitoring the liquid level in the second chamber 302, the temperature obtained by the first temperature sensor 5011 and the conductivity obtained by the conductivity meter 11.

In the description of the present invention, it is to be understood that the terms "lateral," "vertical," "horizontal," "top," "bottom," and the like, as used herein, are defined based on the orientation or positional relationship shown in the drawings and are used merely for convenience in describing the present invention and to simplify the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used merely to distinguish one element from another, and are not to be construed as indicating or implying any relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although the above embodiments have been shown and described, it should be understood that they are exemplary and should not be construed as limiting the present invention, and that many changes, modifications, substitutions and alterations to the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (11)

1. A pure water electrolysis hydrogen production system is characterized by comprising:

an electrolysis unit (1), said electrolysis unit (1) being adapted to electrolyze pure water and to discharge a mixture of hydrogen and water and a mixture of oxygen and water;

the gas-water separation unit (2), the gas-water separation unit (2) is used for receiving the mixture of the hydrogen and the water discharged by the electrolysis unit (1) to separate the hydrogen and the water;

pure water box (3), the inner chamber of pure water box (3) includes first cavity (301) and second cavity (302) of separated, be equipped with first separation piece (303) in first cavity (301), first separation piece (303) will first cavity (301) divide into first sub cavity (3011) and second sub cavity (3012), be equipped with on the chamber wall of second sub cavity (3012) with hydrogen drain (305) of second sub cavity (3012) intercommunication, be equipped with a plurality of first through-holes on first separation piece (303), first through-hole intercommunication first sub cavity (3011) with second sub cavity (3012), be equipped with second separation piece (304) in second cavity (302), second separation piece (304) will second chamber (302) divide into third sub-chamber (3021) and fourth sub-chamber (3022), be equipped with on the chamber wall of third sub-chamber (3021) with oxygen drain (306) of third sub-chamber (3021) intercommunication, second separation piece (304) are equipped with a plurality of second through-holes, second through-hole intercommunication third sub-chamber (3021) and fourth sub-chamber (3022), electrolysis unit (1) with third sub-chamber (3021) intercommunication is in order to let in the mixture of discharge oxygen and water third sub-chamber (3021), electrolysis unit (1) with fourth sub-chamber (3022) intercommunication is in order to receive the pure water of fourth sub-chamber (3022) supply The gas-water separation unit (2) is communicated with the second sub-cavity (3012) to lead the discharged mixture of hydrogen and water into the second sub-cavity (3012), and the first sub-cavity (3011) is used for receiving and storing raw material pure water;

water supply pipeline (4), water supply pipeline (4) intercommunication first sub-chamber (3011) with third sub-chamber (3021), with be used for with pure water in first sub-chamber (3011) supplies into third sub-chamber (3021).

2. A pure water electrolytic hydrogen production system according to claim 1, wherein each of the first through hole and the second through hole comprises a lower through hole (3031) and an upper through hole (3032), the lower through hole (3031) being located below the lowest liquid level of the first chamber (301) or the second chamber (302), and the upper through hole (3032) being located above the highest liquid level of the first chamber (301) or the second chamber (302).

3. The system for electrolytic production of hydrogen by pure water according to claim 1, further comprising a water purification machine assembly (5), wherein the water purification machine assembly (5) comprises a water purification machine water supply line (501), a water purification machine body (502) and a water purification machine water discharge line (503) which are sequentially communicated, the water purification machine water supply line (501) is used for supplying raw material water to the water purification machine body (502), the water purification machine body (502) is used for generating the raw material pure water from the raw material water, and the water purification machine water discharge line (503) is communicated with the first sub-chamber (3011) to supply the raw material pure water to the first sub-chamber (3011).

4. The system for producing hydrogen through electrolysis of pure water as claimed in claim 3, further comprising a first heat exchanger (6), wherein the first heat exchanger (6) is provided with a first medium pipeline and a second medium pipeline, the mediums in the first medium pipeline and the second medium pipeline can exchange heat, the water purifier water supply pipeline (501) is communicated with the first medium pipeline, and the water replenishing pipeline (4) is communicated with the second medium pipeline.

5. The system for electrolytic production of hydrogen by pure water according to claim 4, further comprising a first control valve (7), wherein the first control valve (7) comprises a first valve port, a second valve port and a third valve port, the first valve port is communicated with the first heat exchanger (6), the second valve port is communicated with the first sub-cavity (3011), the third valve port is communicated with the fourth sub-cavity (3022), so that the first sub-cavity (3011) and the first heat exchanger (6) can be switched on and off, and the fourth sub-cavity (3022) and the first heat exchanger (6) can be switched on and off through the first control valve (7).

6. The system for electrolytic hydrogen production of pure water according to claim 4, wherein an adjusting pump (401) is disposed on the water replenishing pipeline (4), a first temperature sensor (5011) is disposed on the water supply pipeline (501) of the water purification machine, the first temperature sensor (5011) is located at the downstream of the first heat exchanger (6), the first temperature sensor (5011) is used for acquiring the temperature of the raw material water in the water supply pipeline (501) of the water purification machine, and the first temperature sensor (5011) is electrically connected with the adjusting pump (401) to adjust the flow rate of the adjusting pump (401) according to the temperature acquired by the first temperature sensor (5011).

7. A system for electrolytic production of hydrogen by pure water according to any one of claims 4-6, characterized by further comprising a second control valve (8) and a water replenishing branch, wherein a first cooler (9) and an ion exchanger (10) are provided in the water replenishing branch, the ion exchanger (10) is used for reducing the conductivity of pure water in the water replenishing branch, the second control valve (8) comprises a first interface, a second interface and a third interface, the first interface is communicated with the first heat exchanger (6), the second interface is communicated with the third sub-chamber (3021) through the water replenishing branch, and the third interface is communicated with the third sub-chamber (3021) through the water replenishing branch, so as to switch the lines of the first heat exchanger (6) and the third sub-chamber (3021) through the second control valve (8).

8. The system for electrolytic hydrogen production of pure water according to claim 7, further comprising an electrolytic water supply line provided with a conductivity meter (11) and a second cooler (12), wherein the fourth sub-chamber (3022) is communicated with the electrolysis unit (1) through the electrolytic water supply line, and the conductivity meter (11) is used for acquiring the conductivity of the pure water in the electrolytic water supply line and adjusting the second control valve (8) according to the acquired conductivity to control the on-off of the first heat exchanger (6) and the water supplementing branch.

9. The system for the electrolytic production of hydrogen by pure water according to claim 8, further comprising a source of cooling medium;

the first cooler (9) comprises a second heat exchanger which is respectively communicated with the cooling medium source and the water supplementing branch so as to be used for carrying out heat exchange between the cooling medium supplied by the cooling medium source and the pure water in the water supplementing branch; and/or

The second cooler (12) comprises a third heat exchanger which is respectively communicated with the cooling medium source and the electrolytic water supply pipeline and is used for carrying out heat exchange between the cooling medium supplied by the cooling medium source and the pure water in the electrolytic water supply pipeline.

10. The system for producing hydrogen through electrolysis of pure water according to claim 9, wherein the cooling medium source is communicated with the first cooler (9) and is provided with a first regulating valve (13) on a pipeline for supplying liquid to the first cooler (9), the water supplementing branch is provided with a second temperature sensor (14), the second temperature sensor (14) is located at the downstream of the first cooler (9), the second temperature sensor (14) is used for acquiring the temperature of pure water in the water supplementing branch, and the second temperature sensor (14) is electrically connected with the first regulating valve (13) and is used for regulating the flow of the first regulating valve (13) according to the acquired temperature;

the cooling medium source is communicated with the second cooler (12) and used for supplying liquid to the second cooler (12), a second regulating valve (15) is arranged on a pipeline of the second cooler (12), a third temperature sensor (16) is arranged on an electrolytic water supply pipeline, the third temperature sensor (16) is located at the downstream of the second cooler (12), the third temperature sensor (16) is used for obtaining the temperature of pure water in the electrolytic water supply pipeline, and the third temperature sensor (16) is electrically connected with the second regulating valve (15) and used for regulating the flow of the second regulating valve (15) according to the obtained temperature.

11. The pure water electrolysis hydrogen production system according to claim 1, characterized by further comprising a hydrogen purification unit (17), the hydrogen purification unit (17) is communicated with the gas-water separation unit (2) through a purification pipeline to be used for receiving the hydrogen discharged by the gas-water separation unit (2), a third regulating valve (18) and a pressure transmitter (19) are arranged on the purification pipeline, the pressure transmitter (19) is used for obtaining the hydrogen pressure in the purification pipeline, and the third regulating valve (18) is electrically connected with the pressure transmitter (19) to adjust the hydrogen pressure in the purification pipeline according to the hydrogen pressure obtained by the pressure transmitter (19).

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