CN211872097U - A wide-power electrolysis water hydrogen production system - Google Patents

Abstract

The utility model discloses a wide-power electrolysis water hydrogen production system, which comprises a rectifier transformer and an electrolytic cell. The rectifier transformer converts alternating current into direct current and then passes it into the electrolytic cell, and further comprises a gas-liquid separator, a gas cooler, a gas A droplet catcher, the rectifier transformer is connected to a fluctuating power supply, the gas-liquid separator includes a hydrogen separator and an oxygen separator, the gas cooler includes a hydrogen cooler and an oxygen cooler, and the gas droplet catcher includes Hydrogen drop catcher and oxygen drop catcher, the catholyte liquid outlet of the electrolytic cell is communicated with the hydrogen separator of the gas-liquid separator, and the anolyte liquid outlet of the electrolytic cell is separated from gas and liquid The oxygen separators of the generator are connected to each other. The utility model can effectively solve the problems of the limited power adjustable range of the current electrolyzed water hydrogen production system and the insufficient response capability of the system pressure adjustment during wide power fluctuations.

Description

A wide-power electrolysis water hydrogen production system

technical field

The utility model relates to the technical field of electrolysis water for hydrogen production, in particular to a wide-power electrolysis water hydrogen production system.

Background technique

Hydrogen energy is a green and efficient secondary energy, which has broad application prospects in the fields of transportation, electricity and fuel. At present, hydrogen mainly comes from coal to hydrogen, natural gas reforming to hydrogen and other fossil fuel hydrogen production. However, fossil fuel hydrogen production has serious pollution and is limited by resource endowment and other problems. With the large-scale development of renewable energy such as wind power and photovoltaics, the use of renewable energy to electrolyze water to produce hydrogen provides a green, low-carbon, low-cost and sustainable production method for hydrogen energy.

However, due to the volatility of power sources such as wind power and photovoltaics, higher requirements are placed on the power fluctuation range and system control of the electrolytic water hydrogen production system. The power adjustable range of the existing electrolyzed water hydrogen production system is limited, the response capability such as system pressure adjustment during wide power fluctuation is insufficient, and the gas purity decreases under low power conditions.

Utility model content

In order to solve the above problems, the purpose of the present invention is to provide a wide-power electrolysis water hydrogen production system, which is used to solve the stable electrolysis hydrogen production work under the power supply of fluctuating power supply.

In order to realize the above-mentioned purpose, the technical scheme adopted by the present utility model is:

A wide-power electrolysis water hydrogen production system, comprising a rectifier transformer, an electrolytic cell, a gas-liquid separator, a gas cooler and a gas drop catcher;

The fluctuating power supply is connected to the electrolytic cell through a rectifier transformer to supply power to the electrolytic cell;

The gas-liquid separator includes a hydrogen separator and an oxygen separator, the gas cooler includes a hydrogen cooler and an oxygen cooler, the gas drop catcher includes a hydrogen drop catcher and an oxygen drop catcher, and the electrolytic cell The catholyte liquid outlet is communicated with the hydrogen separator of the gas-liquid separator, the anolyte liquid outlet of the electrolytic cell is communicated with the oxygen separator of the gas-liquid separator, and the hydrogen separator is in communication with each other. The air outlet is communicated with the air inlet of the hydrogen cooler, the air outlet of the oxygen separator is communicated with the air inlet of the oxygen cooler, and the air outlet of the hydrogen cooler is connected with the hydrogen droplet trapping. The air inlet of the oxygen cooler communicates with each other, and the air outlet of the oxygen cooler communicates with the air inlet of the oxygen droplet catcher.

Further, the fluctuating power source includes wind power or photovoltaic.

Further, the electrolyte residual liquid outlet of the gas-liquid separator is communicated with the liquid infusion port of the electrolytic cell through an electrolyte heat exchanger for recycling of the electrolyte.

Further, a water replenishing device is provided on the pure water replenishing port of the gas-liquid separator.

Further, a circulating cooling system is also included, and the circulating cooling system performs heat exchange with the gas cooler and the electrolyte heat exchanger respectively.

Further, the circulating cooling system is a liquid circulating cooling system or a gas circulating cooling system.

Further, an electrolytic cell controller is provided on the electrolytic cell for controlling the operating current, pressure, temperature, gas purity, electrolyte flow rate, and liquid level of the electrolytic cell.

Further, the electrolytic cell is an alkaline water electrolytic cell or a solid polymer electrolytic cell.

Further, the number of the electrolytic cells is one or more, and a parallel mode is used for multiple electrolytic cells.

The beneficial effects of the present utility model are:

(1) After the utility model adjusts the fluctuating power supply to a stable DC power supply through the rectifier transformer, supplies power to the electrolyzer, so that the electrolyzer can effectively utilize the renewable energy to carry out the electrolysis of water for hydrogen production, while reducing the production cost, improving The work efficiency is improved, and the electrolysis of water can be continuously carried out for hydrogen production, and the gas-liquid separator, gas cooler, and gas drop catcher included in the utility model can respectively cool and dry the hydrogen and oxygen produced by the electrolyzed water. The final result is high-purity hydrogen and oxygen.

(2) In order to realize the recycling of the electrolyte and further reduce the production cost, the electrolyte residual liquid outlet of the gas-liquid separator is communicated with the infusion port of the electrolytic cell through the electrolyte heat exchanger, and the electrolyte heat exchanger can The electrolyte solution is heat exchanged due to the high temperature generated by the electrolysis reaction, so that the electrolyte solution can be adjusted for secondary utilization.

(3) Since water will be consumed in the electrolysis process, a water replenishing device is installed on the pure water replenishment port of the gas-liquid separator, and the pure water is replenished into the gas-liquid separator by using the water replenishing device, thereby ensuring the normal operation of the equipment.

(4) in order to enable the electrolyte heat exchanger and the gas cooler to drop the temperature rapidly, avoid affecting the operation of the equipment because the temperature is too high, therefore, the utility model connects the circulating cooling system on the gas cooler and the electrolyte heat exchanger respectively to carry out heat exchange.

(5) In order to improve the work efficiency, reduce the difficulty of equipment maintenance, and improve the operability of the equipment, the cooling medium of the circulating cooling system adopts liquid or gas.

(6) In order to control and grasp the operating current, pressure, temperature, gas purity, electrolyte flow and liquid level of the electrolytic cell in real time, the electrolytic cell is provided with an electrolytic cell controller.

(7) In order to improve the working efficiency of the equipment, reduce the difficulty of equipment maintenance and operating costs, and improve the operability of the equipment, the electrolytic cell is an alkaline water electrolytic cell or a solid polymer electrolytic cell.

(8) The utility model widens the power operation range of the electrolytic water hydrogen production system by means of multiple electrolytic cells in parallel and single electrolytic cell independent control, and can utilize fluctuating power sources such as renewable energy to carry out electrolysis for hydrogen production, and through multiple electrolysis The tank shares the gas-liquid separator, the gas cooler, and the gas drop catcher, which reduces the complexity and cost of the hydrogen production system.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 is the principle diagram of the utility model.

Among them, 1-rectifier transformer, 2-electrolyzer, 3-gas-liquid separator, 4-gas cooler, 5-gas drip catcher, 6-electrolyte heat exchanger, 7-circulating cooling system, 8-water replenishment device , 9 - Electrolyzer controller.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict.

The following detailed descriptions are all exemplary descriptions and are intended to provide further detailed descriptions of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. The terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention.

As shown in Figure 1, a wide-power electrolysis water hydrogen production system includes a rectifier transformer 1 and an electrolytic cell 2. The rectifier transformer 1 converts alternating current into direct current and then passes it into the electrolytic cell 2, and also includes a gas-liquid separator 3, a gas The cooler 4, the gas drop catcher 5, the rectifier transformer 1 are connected with the fluctuating power supply, the fluctuating power supply includes wind power or photovoltaic, the gas-liquid separator 3 includes a hydrogen separator and an oxygen separator, and the gas cooler 4 includes a hydrogen cooler and The oxygen cooler, the gas drop catcher 5 includes a hydrogen drop catcher and an oxygen drop catcher, the catholyte liquid outlet of the electrolytic cell 2 is communicated with the hydrogen separator of the gas-liquid separator 3, and the anolyte of the electrolytic cell 2 is communicated with each other. The liquid outlet is communicated with the oxygen separator of the gas-liquid separator 3, the air outlet of the hydrogen separator is communicated with the air inlet of the hydrogen cooler, and the air outlet of the oxygen separator is communicated with the air inlet of the oxygen cooler. The outlet of the hydrogen cooler communicates with the inlet of the hydrogen drop catcher, the outlet of the oxygen cooler communicates with the air inlet of the oxygen drop catcher, the outlet of the hydrogen drop catcher discharges dry hydrogen, and the oxygen catches The air outlet of the dropper discharges dry oxygen, and the electrolyte residual liquid outlet of the gas-liquid separator 3 is communicated with the infusion port of the electrolytic cell 2 through the electrolyte heat exchanger 6 for the recycling of the electrolyte, and the gas-liquid separator 3 A water replenishing device 8 is arranged on the pure water replenishment port of the 1000-degree pure water, the utility model also includes a circulating cooling system 7, the circulating cooling system 7 conducts heat exchange with the gas cooler 4 and the electrolyte heat exchanger 6 respectively, and the cooling medium of the circulating cooling system 7 adopts liquid Or gas, electrolyzer 2 is provided with electrolyzer controller 9, is used to control the operating current, pressure, temperature, gas purity, electrolyte flow, liquid level of electrolyzer 2, electrolyzer 2 is alkaline water electrolyzer or solid For polymer electrolytic cells, the number of electrolytic cells 2 is one or more, and the parallel mode is used when multiple electrolytic cells are used.

The electrolytic cell 2 is one of an alkaline water electrolytic cell or a solid polymer electrolytic cell; the number of electrolytic cells 2 is one or more, and the parallel mode is used for multiple electrolytic cells, and each electrolytic cell can operate independently; 2 When the parallel mode is adopted, a set of gas-liquid separator 3, gas cooler 4, gas drop catcher 5, electrolyte heat exchanger 6, circulating cooling system 7, water replenishing device 8, and electrolytic cell controller 9 are shared.

Example 1

When the utility model is in operation, wind power or photovoltaic power is converted into direct current that can be used for electrolysis of water through a rectifier transformer 1, and an alkaline electrolyzed water electrolyzer is used in the electrolytic cell 2, and the total hydrogen production scale is 1000Nm ³ /h. In the parallel-connected mode, the hydrogen production scale of each electrolyzer is 500Nm ³ /h, and the minimum hydrogen production capacity of each electrolyzer is 200Nm ³ /h. Output situation: When the required hydrogen production reaches 1000Nm ³ /h, the two electrolytic cells 2 are running at full power, and the electrolyte flowing out of the cathodes of the two electrolytic cells 2 is merged into the hydrogen separator of the gas-liquid separator 3. After escaping from the separator, it enters the hydrogen cooler of the gas cooler 4 for cooling, the cooled hydrogen enters the hydrogen droplet catcher of the gas droplet catcher 5 to remove water vapor, and the hydrogen at the outlet of the hydrogen droplet catcher can be collected, purified or utilized. . The electrolyte flowing out of the anodes of the two electrolytic cells 2 is merged into the oxygen separator of the gas-liquid separator 3. After the oxygen escapes in the oxygen separator, it enters the oxygen cooler of the gas cooler 4 for cooling, and the cooled oxygen enters the gas trap. The oxygen drop catcher of the dropper 5 removes water vapor, and the oxygen at the outlet of the oxygen drop catcher can be collected, purified or utilized. The electrolyte solution remaining after the gas in the gas-liquid separator 3 escapes is circulated through the electrolyte solution heat exchanger 6 for cooling, and is circulated back to the electrolytic tank 2 . The circulating cooling system 7 uses water as the cooling medium, and the cooling medium is passed into the electrolyte heat exchanger 6 and the gas cooler 3 to cool the electrolyte and the gas respectively. Water is consumed during the electrolysis process, and the water replenishing device 8 replenishes pure water into the gas-liquid separator 3 .

Example 2

As shown in Figure 1, wind power or photovoltaic is used as a power source and is converted into direct current that can be used for electrolysis of water through a rectifier transformer 1. Electrolyzer 2 uses an alkaline electrolyzed water electrolyzer with a total hydrogen production scale of 1000Nm ³ /h. Two electrolyzers are used. In parallel mode, the hydrogen production scale of each electrolyzer is 500Nm ³ /h, the minimum hydrogen production capacity of each electrolyzer is 200Nm ³ /h, and the electrolyzer controller 9 determines the output of the electrolyzer according to the output of wind power and photovoltaics Situation: When the required hydrogen production reaches 200Nm ³ /h, one electrolytic cell 2 stops running, the other electrolytic cell 2 produces 200 Nm ³ /h of hydrogen output, and the electrolytic cell 2 stops running, the electrolyte is no longer circulating, and at the same time, the electrolysis The current is adjusted to zero, and in the running electrolyzer 2, the electrolyte flowing out of the cathode is merged into the hydrogen separator of the gas-liquid separator 3, and after the hydrogen escapes in the hydrogen separator, it enters the hydrogen cooler of the gas cooler 4 for cooling, The cooled hydrogen enters the hydrogen drop catcher of the gas drop catcher 5 to remove water vapor, and the hydrogen at the outlet of the hydrogen drop catcher can be collected, purified or utilized. In the electrolytic cell 2 in operation, the electrolyte flowing from the anode enters the oxygen separator of the gas-liquid separator 3. After the oxygen escapes from the oxygen separator, it enters the oxygen cooler of the gas cooler 4 for cooling, and the cooled oxygen enters the oxygen separator of the gas cooler 4. The oxygen droplet catcher of the gas droplet catcher 5 removes water vapor, the oxygen at the outlet of the oxygen droplet catcher can be collected, purified or utilized, and the remaining electrolyte after the gas escapes in the gas-liquid separator 3 circulates through the electrolyte heat exchanger 6 The temperature is lowered and circulated back to the electrolytic cell 2. The circulating cooling system 7 adopts water as the cooling medium, and the cooling medium is passed into the electrolyte heat exchanger 6 and the gas cooler 3 to cool the electrolyte and the gas respectively. Water is consumed during the electrolysis process, and the water replenishing device 8 replenishes pure water into the gas-liquid separator 3 .

It can be known from the technical common sense that the present invention can be realized by other embodiments without departing from its spirit or essential characteristics. Accordingly, the above-disclosed embodiments are, in all respects, illustrative and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims (9)

1. a wide power electrolyzed water hydrogen production system is characterized in that: comprise rectifier transformer (1), electrolyzer (2), gas-liquid separator (3), gas cooler (4) and gas drip catcher (5) ); The fluctuating power supply is connected to the electrolytic cell (2) through the rectifier transformer (1), for supplying power to the electrolytic cell (2); The gas-liquid separator (3) comprises a hydrogen separator and an oxygen separator, the gas cooler (4) comprises a hydrogen cooler and an oxygen cooler, and the gas drop catcher (5) comprises a hydrogen drop catcher and Oxygen drop catcher, the catholyte liquid outlet of the electrolytic cell (2) is communicated with the hydrogen separator of the gas-liquid separator (3), and the anolyte liquid outlet of the electrolytic cell (2) It is communicated with the oxygen separator of the gas-liquid separator (3), the air outlet of the hydrogen separator is communicated with the air inlet of the hydrogen cooler, and the air outlet of the oxygen separator is communicated with the oxygen cooler. The air inlets of the oxygen coolers are communicated with each other, the air outlet of the hydrogen cooler is communicated with the air inlet of the hydrogen droplet catcher, and the air outlet of the oxygen cooler is communicated with the air inlet of the oxygen droplet catcher. . 2 . The wide-power electrolysis water hydrogen production system according to claim 1 , wherein the fluctuating power source comprises wind power or photovoltaic. 3 . 3. a kind of wide power electrolyzed water hydrogen production system according to claim 1 is characterized in that: the electrolyte residual liquid outlet of described gas-liquid separator (3) passes through electrolyte heat exchanger (6) and described The infusion port of the electrolytic cell (2) is communicated for the recycling of the electrolyte. 4. A wide-power electrolysis water hydrogen production system according to claim 1 or 3, characterized in that: a water replenishing device (8) is provided on the pure water replenishing port of the gas-liquid separator (3). 5. A wide-power electrolysis water hydrogen production system according to claim 3, characterized in that: further comprising a circulating cooling system (7), the circulating cooling system (7) and the gas cooler (4) are respectively Exchange heat with the electrolyte heat exchanger (6). 6 . The wide-power electrolysis water hydrogen production system according to claim 5 , wherein the circulating cooling system ( 7 ) is a liquid circulating cooling system or a gas circulating cooling system. 7 . 7. A kind of wide power electrolysis water hydrogen production system according to claim 1, is characterized in that: described electrolyzer (2) is provided with electrolyzer controller (9), is used for controlling described electrolyzer (2) ) operating current, pressure, temperature, gas purity, electrolyte flow, liquid level. 8. A wide-power electrolysis water hydrogen production system according to claim 1, wherein the electrolytic cell (2) is an alkaline water electrolytic cell or a solid polymer electrolytic cell. 9. a kind of wide power electrolysis water hydrogen production system according to claim 1 or 2 or 3 or 5 or 6 or 7 or 8, is characterized in that: the quantity of described electrolyzer (2) is one or more, Parallel mode is used when multiple electrolyzers are used.

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