CN215628319U - Hydrogen-oxygen balance pressurization system for water electrolysis device - Google Patents
Hydrogen-oxygen balance pressurization system for water electrolysis device Download PDFInfo
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- CN215628319U CN215628319U CN202121927039.XU CN202121927039U CN215628319U CN 215628319 U CN215628319 U CN 215628319U CN 202121927039 U CN202121927039 U CN 202121927039U CN 215628319 U CN215628319 U CN 215628319U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
The utility model relates to a hydrogen-oxygen balance pressurization system for a water electrolysis device, which comprises an electrolytic cell, a hydrogen separation tank, an oxygen separation tank and an electrolysis power supply, wherein the hydrogen separation tank is provided with a first air inlet, a first air outlet and a first water discharge port; the oxygen separation tank is provided with a second air inlet, a second air outlet, a second water inlet and a second water outlet, the second air inlet is connected with an oxygen outlet of the electrolytic cell, a second back pressure valve is arranged at the second air outlet, the second water outlet is positioned at the bottom of the oxygen separation tank and is connected with a water inlet of the electrolytic cell, and the second water inlet is connected with a water source. The hydrogen and oxygen generated by the electrolytic cell are synchronously pressurized in the hydrogen tank and the oxygen tank respectively in the tank body, so that the output pressure of the gas is improved, the high-pressure storage can be directly carried out, the independent increase is not needed, the energy is saved, and the physical separation of the hydrogen and the oxygen is safer.
Description
Technical Field
The utility model relates to the technical field of water electrolysis, in particular to a hydrogen-oxygen balance pressurization system for a water electrolysis device.
Background
Hydrogen energy is a clean energy which has been vigorously developed in the 21 st century because it generates water after combustion and can release a large amount of energy. The industrial hydrogen is mainly prepared by electrolyzing water in an electrolytic tank at present, the conventional electrolytic tank comprises a pure water type electrolytic tank and an alkali liquor type electrolytic tank, both the pure water type electrolytic tank and the alkali liquor type electrolytic tank can be applied to the system, the electrolyzed water in the pure water type electrolytic tank is pure water, and the electrolyzed water in the alkali liquor type electrolytic tank is pure water and alkaline substances.
At present, the existing electrolytic cell has the following defects:
(1) the existing water electrolysis only carries out hydrogen side single-side pressurization or does not collect oxygen, so that oxygen is wasted, the pressure increase is limited, the balance is carried out by using a hydrogen-oxygen double tank through water level difference, the potential safety hazard of hydrogen-oxygen gas crossing exists, and the pressurization effect is general;
(2) the existing system is communicated by liquid through an electrolytic bath, a hydrogen separation tank and an oxygen separation tank or is not provided with the oxygen separation tank, the hydrogen separation tank and the oxygen separation tank, and the pressurization effect is poor;
(3) the gas output from the separation tank contains a large amount of water vapor.
Therefore, there is a need in the art for a safer and less wasteful hydrogen and oxygen balanced pressurizing system for water electrolysis devices.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to overcoming the above-mentioned drawbacks of the prior art and providing a balanced hydrogen and oxygen pressurization system for a water electrolysis device.
In order to achieve the object of the present invention, the present application provides the following technical solutions.
In a first aspect, the present application provides a hydrogen-oxygen balance pressurization system for a water electrolysis device, the system comprising an electrolysis cell, a hydrogen separation tank, an oxygen separation tank, and an electrolysis power supply, wherein,
the electrolytic cell is provided with a hydrogen outlet, an oxygen outlet and a water inlet and is connected with an electrolytic power supply;
the hydrogen separation tank is provided with a first air inlet, a first air outlet and a first water discharge port, the first air inlet is connected with a hydrogen outlet of the electrolytic cell, the first air outlet is positioned at the top of the hydrogen separation tank and is provided with a first back pressure valve, and the first water discharge port is positioned at the bottom of the hydrogen separation tank;
the oxygen separation tank is provided with a second air inlet, a second air outlet, a second water inlet and a second water outlet, the second air inlet is connected with an oxygen outlet of the electrolytic cell, the second air outlet is located at the top of the oxygen separation tank, a second back pressure valve is arranged, the second water outlet is located at the bottom of the oxygen separation tank and is connected with a water inlet of the electrolytic cell, and the second water inlet is connected with a water source.
In this application, set up hydrogen knockout drum and oxygen knockout drum respectively in hydrogen export and oxygen export, the oxyhydrogen gas that produces carries out physical separation, avoids its contact to cause the safety problem. Simultaneously, through setting up first back pressure valve for just discharge after the atmospheric pressure in the hydrogen separator reaches a definite value, and in the same way, just discharge after making the oxygen in the oxygen separator reach a definite value through setting up the second back pressure valve, thereby the pressure differential of adjustable electrolysis trough both sides makes it keep working in the best pressure differential within range, in order to improve the gaseous synchronous pressure boost of both sides, obtains high-pressure gas, reduces follow-up again and carries out the pressure boost to gas, reduces the intermediate link, reduces gaseous pressure boost loss.
In one embodiment of the first aspect, the system is provided with a monitoring device, the monitoring device comprises a detection unit and a control unit, the detection unit is used for detecting the pressure or the water level in the hydrogen separation tank or the oxygen separation tank, and the control unit is connected with the detection unit, controls the opening and closing of the first back pressure valve or the second back pressure valve, and controls the connection or disconnection of the second water inlet and the water source.
In one embodiment of the first aspect, the detection unit includes a first water level detection sensor disposed in the hydrogen separation tank, the first water discharge port is provided with a water discharge valve, the water discharge valve is connected to a control unit, the control unit is connected to the first water level detection sensor, and the control unit controls opening and closing of the water discharge valve based on a signal of the first water level detection sensor. When the liquid level in the hydrogen separation tank is too high, the first water level detection sensor transmits a signal to the control unit, the control unit controls the drain valve to be opened, and water is discharged from the first drain port. When the liquid level drops to a preset value, the drain valve is closed.
In one embodiment of the first aspect, the detection unit includes a first pressure detection sensor disposed at a top of the hydrogen separation tank, the control unit is connected to the first pressure detection sensor, and the control unit controls opening and closing of the first back pressure valve based on a signal of the first pressure detection sensor. When the air pressure in the hydrogen separation tank is higher than a certain set value, the first pressure detection sensor sends a signal to the control unit, and the control unit controls the first back pressure valve to be opened and outputs high-pressure hydrogen to the outside. When the air pressure is lower than the set value, the first backpressure valve is closed. This arrangement can ensure that the pressure of the hydrogen gas output outward is higher than a certain pressure value. And when the water level in the hydrogen separation tank was too high, opened the drain valve drainage, vacant volume grow in the hydrogen separation tank this moment can lead to the gas pressure to change down, first back pressure valve generally can close this moment.
In an embodiment of the first aspect, the detection unit includes a second water level detection sensor disposed in the oxygen separation tank, a water inlet valve is disposed on a connection pipeline between the second water inlet and the water source, the water inlet valve is connected to the control unit, the control unit is connected to the second water level detection sensor, and the control unit controls opening and closing of the water inlet valve based on a signal of the second water level detection sensor. The water in the oxygen separation tank is directly communicated with the electrolytic cell and is continuously fed into the electrolytic cell. Because the consumption during water electrolysis and the consumption when discharging from the hydrogen knockout drum, water in the entire system can constantly reduce, in order to avoid influencing the efficiency of water electrolysis, when the water level in the oxygen knockout drum is too low, second water level detection sensor signals for the control unit, the control unit control water intaking valve is opened, and the water source sends into pure water in to the oxygen knockout drum, guarantees the sufficiency of water.
In one embodiment of the first aspect, the second drain opening has a height greater than a height of the electrolytic cell.
In one embodiment of the first aspect, the detection unit includes a second pressure detection sensor provided at a top of the hydrogen separation tank, the control unit is connected to the second pressure detection sensor, and the control unit controls opening and closing of the second backpressure valve based on a signal of the second pressure detection sensor. When the air pressure in the oxygen separation tank is higher than a certain set value, the second pressure detection sensor sends a signal to the control unit, and the control unit controls the second back pressure valve to be opened and outputs high-pressure oxygen to the outside. When the air pressure is lower than the set value, the second backpressure valve is closed. The setting can ensure that the pressure of the oxygen output outwards is higher than a certain pressure value.
In one embodiment of the first aspect, the control unit comprises a PLC controller or a single chip microcomputer.
In one embodiment of the first aspect, the top of the hydrogen separation tank and the oxygen separation tank are provided with a first safety valve and a second safety valve, respectively.
In one embodiment of the first aspect, a liquid trap material is provided in an upper portion of each of the hydrogen separation tank and the oxygen separation tank. The liquid-catching material can be selected from metal mesh, microporous material, etc.
Compared with the prior art, the utility model has the beneficial effects that:
(1) by arranging the hydrogen separation tank and the oxygen separation tank at the same time, hydrogen and oxygen can be obtained without contacting with each other, so that the safety of the system is ensured;
(2) the output hydrogen and oxygen can be ensured to be high-pressure and relatively dry gases;
(3) the pressure difference of adjustable electrolysis trough both sides makes it keep working in the best pressure difference within range to improve the gaseous synchronous pressure boost of both sides, obtain high-pressure gas, reduce follow-up again and carry out the pressure boost to gas, reduce intermediate link, reduce gaseous pressure boost loss.
Drawings
FIG. 1 is a schematic diagram of the hydrogen-oxygen equilibrium pressurization system of the present application.
In the drawing, 1 is an electrolytic bath, 2 is an electrolytic power supply, 3 is a hydrogen separation tank, 4 is a drain valve, 5 is a first water level detection sensor, 6 is a first back pressure valve, 7 is a first pressure detection sensor, 8 is a first safety valve, 9 is an oxygen separation tank, 10 is a second water level detection sensor, 11 is a water inlet valve, 12 is a second back pressure valve, 13 is a second pressure detection sensor, 14 is a second safety valve, 15 is a controller, and 16 is a liquid trap net.
Detailed Description
Unless otherwise defined, technical or scientific terms used herein in the specification and claims should have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. All numerical values recited herein as between the lowest value and the highest value are intended to mean all values between the lowest value and the highest value in increments of one unit when there is more than two units difference between the lowest value and the highest value.
While specific embodiments of the utility model will be described below, it should be noted that in the course of the detailed description of these embodiments, in order to provide a concise and concise description, all features of an actual implementation may not be described in detail. Modifications and substitutions to the embodiments of the present invention may be made by those skilled in the art without departing from the spirit and scope of the present invention, and the resulting embodiments are within the scope of the present invention.
Examples
The following will describe in detail the embodiments of the present invention, which are implemented on the premise of the technical solution of the present invention, and the detailed embodiments and the specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
A hydrogen-oxygen balance pressurization system for a water electrolysis device is structurally shown in figure 1 and comprises an electrolytic cell 1, a hydrogen separation tank 3, an oxygen separation tank 9 and an electrolysis power supply 2, wherein the electrolytic cell 1 is provided with a hydrogen outlet, an oxygen outlet and a water inlet, and the electrolytic cell 1 is connected with the electrolysis power supply 2; the hydrogen separation tank 3 is provided with a first gas inlet, a first gas outlet and a first water discharge port, the first gas inlet is connected with a hydrogen outlet of the electrolytic cell 1, the first gas outlet is positioned at the top of the hydrogen separation tank 3 and is provided with a first back pressure valve 6, and the first water discharge port is positioned at the bottom of the hydrogen separation tank 3; the oxygen separation tank 9 is provided with a second air inlet, a second air outlet, a second water inlet and a second water outlet, the second air inlet is connected with an oxygen outlet of the electrolytic cell 1, the second air outlet is positioned at the top of the oxygen separation tank 9 and is provided with a second back pressure valve 12, the second water outlet is positioned at the bottom of the oxygen separation tank 9 and is connected with a water inlet of the electrolytic cell 1, and the second water inlet is connected with a water source.
The system further comprises a controller 15, and the present embodiment employs a PLC controller 15. A first water level detection sensor 5 is arranged in the hydrogen separation tank 3, a drain valve 4 is arranged at a first drain port, a first pressure detection sensor 7 and a first safety valve 8 are arranged at the top of the hydrogen separation tank 3, the drain valve 4 and a first back pressure valve 6 are connected with a controller 15, the controller 15 is connected with the first water level detection sensor 5, and the opening and closing of the drain valve 4 are controlled based on a signal of the first water level detection sensor 5; the controller 15 is connected to the first pressure detection sensor 7, and controls opening and closing of the first back pressure valve 6 based on a signal from the first pressure detection sensor 7. A second water level detection sensor 10 is arranged in the oxygen separation tank 9, a water inlet valve 11 is arranged on a connecting pipeline of a second water inlet and a water source, a second pressure detection sensor 13 and a second safety valve 14 are arranged at the top of the oxygen separation tank 9, the water inlet valve 11 and a second back pressure valve 12 are connected with a controller 15, the controller 15 is connected with the second water level detection sensor 10, and the opening and closing of the water inlet valve 11 are controlled based on a signal of the second water level detection sensor 10; the controller 15 is connected to the second pressure detection sensor 13, and controls opening and closing of the second back pressure valve 12 based on a signal from the second pressure detection sensor 13.
A liquid trap net 16 is provided at the middle upper part of the hydrogen separation tank 3 and the oxygen separation tank 9.
The electrolytic water is decomposed into hydrogen and oxygen in the electrolytic tank 1 by the electrolytic tank 1 under the action of the current of the electrolytic power supply 2, specifically, proper water is added into the oxygen separation tank 9, the water flows into the electrolytic tank 1 through the second water outlet and the pipeline, the water and the oxygen flow into the oxygen separation tank 9 simultaneously along with the output of the oxygen, the used electrolytic water works circularly, the electrolytic tank 1 can properly consume a small amount of electrolytic water during working, and the electrolytic water is supplemented to proper water amount from the outside (namely a water source) when the water amount of the electrolytic water is slightly small.
Hydrogen decomposed in the electrolytic cell 1 is output to a hydrogen separation tank 3 through a pipeline, liquid water contained in the hydrogen separates hydrogen and water in the separation tank, a liquid catching net 16 is arranged at the upper part of the separation tank and can catch water vapor in the hydrogen, when the water amount in the tank reaches a certain amount, a first water level detection sensor 5 transmits a signal to a controller 15, and the controller 15 sends an execution signal to a drain valve 4 to discharge proper water amount and ensure the water amount in the tank body; the hydrogen separation tank 3 and the oxygen separation tank 9 are synchronously pressurized, pressure detection is carried out on the respective separation tanks, and the pressure is balanced by adjusting respective back pressure valves to ensure that the pressure difference between the two tanks is in a proper range until the gas reaches the designed output pressure value; and a safety valve on the separation tank ensures the safety value of the gas in the tank body.
The separation tank has the advantages that the water level is detected, the water-gas mixture is separated into gas and water in the tank body according to the principle of gravity, the gas is provided with water vapor which is captured by the liquid capturing net 16 in the tank body, and the water content of the output gas is low; the output pressure of the separating tank can reach the pressure for charging the gas storage cylinder, and the gas can be directly charged into the external gas cylinder by simply purifying and drying the gas. The water in the oxygen separation tank 9 can perform a cooling function on the electrolytic cell 1 during operation, and a water pump can be added to a water pipeline output by the separation tank to control the speed or flow of water circulation.
The electrolyzed water is input into the oxygen separation tank 9 from the outside and stores a proper amount of liquid level, and when the liquid level is smaller, the electrolyzed water is input from an external water source; the position of the electrolytic water which is input into the electrolytic tank 1 at the oxygen side of the electrolytic tank 1 through a pipeline is lower than that of the electrolytic tank 1, the water used by the oxygen separation tank 9 can completely permeate into the electrolytic tank 1 or the electrolytic water is injected into the electrolytic tank 1 through a water pump; hydrogen and oxygen are decomposed in the electrolytic cell 1 through the electrolytic cell 1 of water under the action of current of an electrolytic power supply 2, the hydrogen output of the electrolytic cell 1 is input into a hydrogen separation tank 3 through a pipeline, water in the hydrogen is primarily separated in the hydrogen separation tank 3, the hydrogen is stored in a tank body, meanwhile, the oxygen output of the electrolytic cell 1 and water flow into an oxygen separation tank 9 together through a pipeline, the water is recycled as electrolyzed water, and the oxygen is stored in the tank body after the water is separated out from the oxygen in the separation tank; the electrolytic cell 1 continuously generates hydrogen and oxygen, more and more gas is in each tank body, the gas pressure in the tank bodies slowly and synchronously rises, the quantity of the generated hydrogen and the generated oxygen is 2:1, and the two separation tanks control the gas pressure and the gas output through a back pressure valve.
Signals acquired by pressure detection and water level detection are input into the controller 15 on the separating tank, and the controller 15 sends an operation instruction to the drain valve 4, the backpressure valve, the water inlet valve 11, the electrolysis power supply 2 and the like according to the acquired signals. The safety valve is a mechanical gas protection device, and an electronic protection function can be set through a pressure detection signal.
The embodiments described above are intended to facilitate the understanding and appreciation of the application by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present application is not limited to the embodiments herein, and those skilled in the art who have the benefit of this disclosure will appreciate that many modifications and variations are possible within the scope of the present application without departing from the scope and spirit of the present application.
Claims (10)
1. An oxyhydrogen balance pressurization system for a water electrolysis device, which is characterized by comprising an electrolysis bath, a hydrogen separation tank, an oxygen separation tank and an electrolysis power supply, wherein,
the electrolytic cell is provided with a hydrogen outlet, an oxygen outlet and a water inlet and is connected with an electrolytic power supply;
the hydrogen separation tank is provided with a first air inlet, a first air outlet and a first water discharge port, the first air inlet is connected with a hydrogen outlet of the electrolytic cell, the first air outlet is positioned at the top of the hydrogen separation tank and is provided with a first back pressure valve, and the first water discharge port is positioned at the bottom of the hydrogen separation tank;
the oxygen separation tank is provided with a second air inlet, a second air outlet, a second water inlet and a second water outlet, the second air inlet is connected with an oxygen outlet of the electrolytic cell, the second air outlet is located at the top of the oxygen separation tank, a second back pressure valve is arranged, the second water outlet is located at the bottom of the oxygen separation tank and is connected with a water inlet of the electrolytic cell, and the second water inlet is connected with a water source.
2. The system for balancing and pressurizing hydrogen and oxygen for a water electrolysis device according to claim 1, wherein the system is provided with a monitoring device comprising a detection unit for detecting the pressure or water level in the hydrogen separation tank or the oxygen separation tank and a control unit connected to the detection unit and controlling the opening and closing of the first back pressure valve or the second back pressure valve and the connection or disconnection of the second water inlet to the water source.
3. The system of claim 2, wherein the detection unit comprises a first water level detection sensor disposed in the hydrogen separation tank, the first water discharge port is provided with a water discharge valve, the water discharge valve is connected to the control unit, the control unit is connected to the first water level detection sensor, and the control unit controls the opening and closing of the water discharge valve based on a signal of the first water level detection sensor.
4. The system of claim 2, wherein the sensing unit comprises a first pressure sensing force sensor provided at the top of the hydrogen separation tank, the control unit is connected to the first pressure sensing force sensor, and the control unit controls the opening and closing of the first back pressure valve based on a signal of the first pressure sensing force sensor.
5. The system of claim 2, wherein the detection unit comprises a second water level detection sensor disposed in the oxygen separation tank, a water inlet valve is disposed on a connection pipeline between the second water inlet and the water source, the water inlet valve is connected to the control unit, the control unit is connected to the second water level detection sensor, and the control unit controls the opening and closing of the water inlet valve based on a signal of the second water level detection sensor.
6. The hydrogen and oxygen balance pressurization system for water electrolysis device according to claim 5, wherein the second water discharge outlet has a height higher than that of the electrolytic bath.
7. The system of claim 2, wherein the sensing unit comprises a second pressure sensing force sensor provided at the top of the hydrogen separation tank, the control unit is connected to the second pressure sensing force sensor, and the control unit controls the opening and closing of the second back pressure valve based on a signal of the second pressure sensing force sensor.
8. The system of any one of claims 2 to 7, wherein the control unit comprises a PLC controller or a single-chip microcomputer.
9. The hydrogen and oxygen balance pressurization system for water electrolysis device according to claim 1, wherein the top of the hydrogen separation tank and the oxygen separation tank are respectively provided with a first safety valve and a second safety valve.
10. The system for equalizing and boosting hydrogen and oxygen for water electrolysis apparatus according to claim 1, wherein a liquid trap material is provided in upper portions of the hydrogen separation tank and the oxygen separation tank.
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| CN202121927039.XU CN215628319U (en) | 2021-08-17 | 2021-08-17 | Hydrogen-oxygen balance pressurization system for water electrolysis device |
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| CN202121927039.XU CN215628319U (en) | 2021-08-17 | 2021-08-17 | Hydrogen-oxygen balance pressurization system for water electrolysis device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115652351A (en) * | 2022-11-03 | 2023-01-31 | 嘉庚创新实验室 | Asymmetric water electrolysis hydrogen production device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115652351A (en) * | 2022-11-03 | 2023-01-31 | 嘉庚创新实验室 | Asymmetric water electrolysis hydrogen production device |
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