Alkaline electrolytic bath heat preservation system utilizing solar heat

Abstract

The utility model provides an alkaline electrolytic bath heat preservation system utilizing solar heat. The alkaline electrolytic bath heat preservation system comprises a solar mirror field, a water tank, a heat exchanger, an alkaline water tank and an alkaline electrolytic bath, a solar mirror field is arranged above the water tank; a water outlet end of the water tank is connected to a heat source inlet of the heat exchanger; a heat source outlet of the heat exchanger is connected to a water return end of the water tank; an alkaline liquor outlet of the alkaline electrolytic bath is connected to an alkaline liquor inlet of the alkaline water tank; an alkaline liquid outlet of the alkaline water tank is connected to a cold source inlet of the heat exchanger; a cold source outlet of the heat exchanger is connected to an alkali liquor inlet of the alkaline electrolytic bath. According to the utility model, clean and renewable solar energy resources are fully utilized, and the solar energy resources are adopted to carry out heat preservation on the electrolyte in the electrolytic bath in a standby state, so that the electrolyte in the electrolytic bath reaches a starting temperature, and the electrolytic bath reaches a hot standby state; and then the electrolytic bath is started, and the electrolytic bath can enter a working state after about 5 minutes, so that the starting time is greatly shortened, and the power consumption in the starting stage is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen production by electrolysis of water, and in particular relates to an alkaline electrolytic cell insulation system utilizing solar heat. Background Art

[0002] Currently, in alkaline water electrolysis hydrogen production technology, the electrolyzer enters a cold standby state before startup—that is, a state where the electrolyte temperature within the electrolyzer is consistent with the ambient temperature. To start the electrolyzer in this cold standby state, the electrolyzer must first be warmed up to reach the acceptable temperature range before operation can begin. This long startup time typically exceeds 30 minutes, and the energy consumption during this phase is high. Addressing this issue, shortening the electrolyzer startup time, and reducing energy consumption during the startup phase are key issues currently under investigation. Utility Model Content

[0003] In view of the defects of the prior art, the utility model provides an alkaline electrolytic cell insulation system using solar heat, which can effectively solve the above problems.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] The utility model provides an alkaline electrolytic cell insulation system for utilizing solar heat, comprising: a solar mirror field (1), a water tank (2), a heat exchanger (5), an alkaline water tank (6) and an alkaline electrolytic cell (8);

[0006] The solar mirror field (1) is arranged above the water tank (2); the water outlet of the water tank (2) is connected to the heat source inlet of the heat exchanger (5) through a water supply pipeline (L1); the heat source outlet of the heat exchanger (5) is connected to the return water end of the water tank (2) through a return water pipeline (L2); thereby forming a water circuit circulation;

[0007] The alkali solution outlet of the alkaline electrolytic cell (8) is connected to the alkali solution inlet of the alkaline water tank (6) through a first alkali solution delivery pipeline (P1); the alkali solution outlet of the alkaline water tank (6) is connected to the cold source inlet of the heat exchanger (5) through a second alkali solution delivery pipeline (P2); the cold source outlet of the heat exchanger (5) is connected to the alkali solution inlet of the alkaline electrolytic cell (8) through a third alkali solution delivery pipeline (P3); thereby forming an alkali solution circulation.

[0008] Preferably, a circulating water pump (3) is arranged in the water supply pipeline (L1).

[0009] Preferably, a branch line is led out from the water delivery pipeline (L1) and connected to a hot water storage tank (4).

[0010] Preferably, the third alkali solution delivery pipeline (P3) is provided with an alkali solution circulation pump (7).

[0011] Preferably, the hydrogen generating port of the alkaline electrolytic cell (8) is connected to the air inlet of the hydrogen gas-liquid separator (9); and the exhaust end of the hydrogen gas-liquid separator (9) is connected to the air inlet of the hydrogen drying, purification and compression system (11).

[0012] Preferably, the oxygen generating port of the alkaline electrolytic cell (8) is connected to the air inlet of the oxygen-liquid separator (10); and the exhaust port of the oxygen-liquid separator (10) is connected to the air inlet of the oxygen drying, purification and compression system (12).

[0013] The utility model provides an alkaline electrolytic cell insulation system utilizing solar thermal energy, which has the following advantages:

[0014] The utility model provides an alkaline electrolytic cell insulation system utilizing solar thermal energy, which makes full use of clean and renewable solar energy resources. The solar energy resources are used to insulate the electrolyte in the electrolytic cell in a standby state, so that the electrolyte in the electrolytic cell reaches the starting temperature, generally a temperature of 70-90° C., so that the electrolytic cell reaches a hot standby state; and then the electrolytic cell is started, and the electrolytic cell can enter the working state in about 5 minutes, thereby greatly shortening the starting time and reducing the power consumption in the starting stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of an alkaline electrolytic cell insulation system using solar heat provided by the utility model.

[0016] in:

[0017] 1 Solar mirror field; 2 Water tank; 3 Circulating water pump; 4 Heat storage tank; 5 Heat exchanger; 6 Alkaline water tank; 7 Alkaline solution circulating pump; 8 Alkaline electrolyzer; 9 Hydrogen gas-liquid separator; 10 Oxygen gas-liquid separator; 11 Hydrogen drying, purification and compression system; 12 Oxygen drying, purification and compression system;

[0018] L1 water supply pipeline; L2 return water pipeline; P1 first alkali solution delivery pipeline; P2 second alkali solution delivery pipeline; P3 third alkali solution delivery pipeline. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] The utility model provides an alkaline electrolytic cell insulation system utilizing solar thermal energy, specifically an auxiliary insulation system for a shutdown electrolytic cell for large-scale alkaline water electrolysis hydrogen production using solar energy, which solves the technical problems in large-scale alkaline water electrolysis hydrogen production projects that a cold standby electrolytic cell cannot be quickly started due to low cell temperature and has high startup power consumption.

[0021] See Figure 1 The utility model provides an alkaline electrolytic cell insulation system for solar thermal utilization, comprising: a solar mirror field 1, a water tank 2, a heat exchanger 5, an alkaline water tank 6 and an alkaline electrolytic cell 8;

[0022] A solar array 1 is placed above the water tank 2. The water outlet of the water tank 2 is connected to the heat source inlet of the heat exchanger 5 via a water supply line L1. A circulating water pump 3 is installed in the water supply line L1. A branch line from the water supply line L1 is connected to a hot water storage tank 4. The heat source outlet of the heat exchanger 5 is connected to the return line of the water tank 2 via a return line L2, thus forming a water circuit.

[0023] The alkali liquid outlet of the alkaline electrolytic cell 8 is connected to the alkali liquid inlet of the alkaline water tank 6 through the first alkali liquid delivery pipeline P1; the alkali liquid outlet of the alkaline water tank 6 is connected to the cold source inlet of the heat exchanger 5 through the second alkali liquid delivery pipeline P2; the cold source outlet of the heat exchanger 5 is connected to the alkali liquid inlet of the alkaline electrolytic cell 8 through the third alkali liquid delivery pipeline P3; the third alkali liquid delivery pipeline P3 is arranged with an alkali liquid circulation pump 7; thereby, an alkali liquid circulation is formed.

[0024] The hydrogen generating port of the alkaline electrolytic cell 8 is connected to the air inlet of the hydrogen gas-liquid separator 9 ; the exhaust port of the hydrogen gas-liquid separator 9 is connected to the air inlet of the hydrogen drying, purification and compression system 11 .

[0025] The oxygen generating port of the alkaline electrolytic cell 8 is communicated with the air inlet of the oxygen-liquid separator 10 ; the exhaust port of the oxygen-liquid separator 10 is communicated with the air inlet of the oxygen drying, purification and compression system 12 .

[0026] The utility model provides an alkaline electrolytic cell insulation system utilizing solar thermal energy, which works as follows:

[0027] 1. Utilize solar mirror field 1 to concentrate solar radiation and heat the medium in water tank 2;

[0028] 2. After the medium in the water tank 2 is heated, a portion of it enters the heat exchanger 5 under the action of the circulating water pump 3 to heat the alkali solution in the electrolysis water system. The low-temperature medium after heat exchange in the heat exchanger 5 is recirculated to the mirror field area of ​​the water tank 2 for heating; the other portion enters the hot water storage tank 4 for storage and use at night or on rainy days;

[0029] 3. The alkaline water in the alkaline water tank 6 of the alkaline electrolysis water hydrogen production system reaches the alkaline electrolysis water working temperature after heat exchange in the heat exchanger 5, enters the alkaline electrolytic cell 8 through the alkaline solution circulation pump 7, and the low-temperature alkaline solution flows back into the alkaline water tank 6.

[0030] Through the above steps 1 to 3, the electrolyte in the alkaline electrolytic cell 8 in the standby state is kept warm by using solar energy resources, so that the electrolyte in the alkaline electrolytic cell 8 reaches the starting temperature, generally 70-90° C., and the alkaline electrolytic cell 8 reaches the hot standby state.

[0031] 4. Then, the alkaline electrolytic cell 8 is started to generate an electrolytic reaction, generating hydrogen and oxygen at two stages. The hydrogen can be used after passing through the hydrogen gas-liquid separator 9 and the hydrogen drying, purification and compression system 11; the oxygen can be used after passing through the oxygen gas-liquid separator 10 and the oxygen drying, purification and compression system 12.

[0032] The utility model provides an alkaline electrolytic cell insulation system utilizing solar thermal energy, which makes full use of clean and renewable solar energy resources. The solar energy resources are used to insulate the electrolyte in the electrolytic cell in a standby state, so that the electrolyte in the electrolytic cell reaches the starting temperature, generally a temperature of 70-90° C., so that the electrolytic cell reaches a hot standby state; and then the electrolytic cell is started, and the electrolytic cell can enter the working state in about 5 minutes, thereby greatly shortening the starting time and reducing the power consumption in the starting stage.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A solar thermal energy utilization alkaline electrolytic cell insulation system, characterized in that: include: Solar mirror field (1), water tank (2), heat exchanger (5), alkaline water tank (6) and alkaline electrolytic cell (8); The solar mirror field (1) is arranged above the water tank (2); the water outlet of the water tank (2) is connected to the heat source inlet of the heat exchanger (5) through a water supply pipeline (L1); the heat source outlet of the heat exchanger (5) is connected to the return water end of the water tank (2) through a return water pipeline (L2); thereby forming a water circuit circulation; The alkali solution outlet of the alkaline electrolytic cell (8) is connected to the alkali solution inlet of the alkaline water tank (6) through a first alkali solution delivery pipeline (P1); the alkali solution outlet of the alkaline water tank (6) is connected to the cold source inlet of the heat exchanger (5) through a second alkali solution delivery pipeline (P2); the cold source outlet of the heat exchanger (5) is connected to the alkali solution inlet of the alkaline electrolytic cell (8) through a third alkali solution delivery pipeline (P3); thereby forming an alkali solution circulation.

2. The alkaline electrolytic cell insulation system for solar thermal utilization according to claim 1, characterized in that: A circulating water pump (3) is arranged in the water delivery pipeline (L1).

3. The alkaline electrolytic cell insulation system for solar thermal utilization according to claim 1, characterized in that: The water delivery pipeline (L1) leads out a branch, which is connected to and installed in a hot water storage tank (4).

4. The alkaline electrolytic cell insulation system for solar thermal utilization according to claim 1, characterized in that: The third alkali solution delivery pipeline (P3) is provided with an alkali solution circulation pump (7).

5. The alkaline electrolytic cell insulation system for solar thermal utilization according to claim 1, characterized in that: The hydrogen generating port of the alkaline electrolytic cell (8) is communicated with the air inlet of the hydrogen gas-liquid separator (9); the exhaust port of the hydrogen gas-liquid separator (9) is communicated with the air inlet of the hydrogen drying, purification and compression system (11).

6. The alkaline electrolytic cell insulation system for solar thermal utilization according to claim 1, characterized in that: The oxygen generating port of the alkaline electrolytic cell (8) is communicated with the air inlet end of the oxygen-liquid separator (10); the exhaust end of the oxygen-liquid separator (10) is communicated with the air inlet end of the oxygen drying, purification and compression system (12).

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