Auxiliary equipment for skid-mounted alkaline water electrolysis hydrogen production system

Abstract

The invention discloses auxiliary equipment for a skid-mounted alkaline water electrolysis hydrogen production system, which comprises a box body, a power distribution cabinet room for supplying power is arranged in the box body, and the power distribution cabinet room is respectively connected with a water treatment equipment room, an air compressor equipment room and an output equipment room which are arranged in the box body through lines; the box body is provided with a power input port connected with an external power supply relative to the power distribution cabinet; a water source input port is formed in the box body opposite to the water treatment equipment room; the box body is provided with an air input port opposite to the air compressor equipment room; and an instrument gas output port, a raw material water output port, an alkali liquor output port and a purge gas output port are formed in the box body relative to the output equipment room. The pure water preparation system, the alkali preparation system, the compressed air system and the nitrogen system are integrated, the space utilization rate is increased, and the occupied space of auxiliary equipment is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen production by electrolysis of water, and in particular relates to auxiliary equipment for a skid-mounted alkaline water electrolysis hydrogen production system. Background Art

[0002] Alkaline water electrolysis technology is a low-temperature electrolysis technology that uses KOH and NaOH aqueous solutions as electrolytes. The concentration of the electrolyte is generally 20wt%~30wt%. PPS or high molecular polymers are used as diaphragms, and nickel-based materials are used as electrodes. Under the action of direct current, water is electrolyzed to produce hydrogen and oxygen.

[0003] Alkaline water electrolysis hydrogen production systems require auxiliary equipment to assist during alkaline water electrolysis. These auxiliary equipment primarily provides the system with deionized feedwater, KOH / NaOH lye, instrument air, and replacement nitrogen, among other components. These include a pure water preparation system, an alkali preparation system, a compressed air system, and a nitrogen system. The conventional layout of existing hydrogen production systems requires dedicated auxiliary rooms to house these systems, resulting in large footprints, low space utilization, and lengthy installation times. Summary of the Invention

[0004] The purpose of the present invention is to provide auxiliary equipment for a skid-mounted alkaline water electrolysis hydrogen production system, which integrates a pure water preparation system, an alkali preparation system, a compressed air system, and a nitrogen system, thereby improving space utilization and reducing the space occupied by the auxiliary equipment.

[0005] The technical solution adopted by the present invention is that the auxiliary equipment for the skid-mounted alkaline water electrolysis hydrogen production system includes a box body, in which a distribution cabinet room for power supply is provided, and the distribution cabinet room is respectively connected to the water treatment equipment room, air compressor equipment room and output equipment room arranged in the box body through lines; the box body is provided with a power input port for connecting to an external power supply at a position relative to the distribution cabinet room; the box body is provided with a water source input port at a position relative to the water treatment equipment room; the box body is provided with an air input port at a position relative to the air compressor equipment room; and the box body is provided with an instrument gas output port, a raw water output port, an alkali solution output port and a purge gas output port at a position relative to the output equipment room.

[0006] The present invention is also characterized in that The water treatment equipment room includes a raw water tank and an alkali preparation tank fixedly connected to the inside of the box body. The raw water tank is connected to the raw water tank through a water source input port. The raw water tank is connected to a pure water machine through a pipeline. The water outlet of the pure water machine is connected to a water supply pump through a pipeline. The water outlet of the water supply pump is connected to the pure water tank through a pipeline. The pure water in the pure water machine enters the pure water tank under the action of the water supply pump. The water outlet of the pure water tank is connected to two pipelines. One pipeline is connected to the output equipment room and is connected to the water supply pipeline of the alkaline water electrolysis hydrogen production system through the raw water output port; the other pipeline is connected to the alkali preparation tank, which is equipped with an automatic feeding hopper, a stirrer and an alkali solution concentration analyzer. The water outlet of the alkali preparation tank is connected to the output equipment room and is connected to the alkali solution pipeline of the alkaline water electrolysis hydrogen production system through the alkali solution output port.

[0007] A dosing system is installed above the water purifier, and a pressure gauge and conductivity meter are installed at the water outlet of the water purifier. When the water quality and pressure drop, the dosing system adds scale inhibitor into the water purifier.

[0008] A water suction pump is provided in the water purifier, and the water inlet of the water suction pump is connected to the raw water tank through a pipeline.

[0009] The air compressor equipment room includes an air compressor fixedly connected to the inner wall of the box. The air inlet of the air compressor is set relative to the air input port. The air outlet of the air compressor is connected to a dryer through a pipe. The dryer is used to filter oil and dust in the compressed air. The air outlet of the dryer is connected to the output equipment room through a pipe.

[0010] The output device room includes the following equipment: Compressed air buffer tank, which is connected to the dryer through a pipeline and supplies air to each pneumatic actuator of the alkaline water electrolysis hydrogen production system through the instrument air output port; Nitrogen container grid and busbar, which are connected to the nitrogen filling pipeline of the alkaline water electrolysis hydrogen production system through the purge gas output port; The water supply pump is connected to the pure water tank through a pipeline, and the pure water is connected to the water supply pipeline through the raw water output port; The alkali replenishing pump is connected to the alkali preparation tank through a pipeline, and the alkali solution prepared in the alkali preparation tank is connected to the alkali solution pipeline through the alkali solution output port; The compressed air buffer tank, nitrogen container grid and busbar, water supply pump and alkali supply pump are all fixedly connected to the inside of the box.

[0011] National standard hydrogen storage cylinders are installed in the nitrogen container.

[0012] Partition walls are set between the power distribution cabinet room, water treatment equipment room, air compressor equipment room and output equipment room. The pipes connecting various equipment are set at the bottom of the box, and the pipes pass through the partition walls from the bottom of the box.

[0013] The distribution cabinet room includes a distribution cabinet and a fire extinguisher. The distribution cabinet is fixedly connected to the box and is connected to the electrical equipment in the water treatment equipment room, air compressor equipment room and output equipment room through lines. The external power supply is connected to the distribution cabinet through the power input port.

[0014] The box is equipped with double doors relative to the power distribution cabinet room, water treatment equipment room, air compressor equipment room and output equipment room for equipment operation and maintenance.

[0015] The beneficial effects of the present invention are: The auxiliary equipment for the skid-mounted alkaline water electrolysis hydrogen production system of the present invention integrates multiple auxiliary equipment such as the power distribution cabinet, raw water tank, pure water machine, pure water tank, alkali preparation tank, air compressor, dryer, compressed air buffer tank, nitrogen container and bus, water supply pump, alkali supply pump, etc. of the traditional process, reducing the floor space occupied by the auxiliary equipment. The auxiliary equipment can be pre-installed in the box and transported as a whole to the installation site for installation. During on-site installation, it only needs to connect the reserved import and export pipelines before use, which greatly reduces the installation time of the auxiliary system and saves the construction cost of the auxiliary building. At the same time, the box is provided with a double-door structure relative to the power distribution cabinet room, water treatment equipment room, air compressor equipment room, and output equipment room to facilitate the operation and maintenance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the auxiliary equipment used in the skid-mounted alkaline water electrolysis hydrogen production system of the present invention.

[0017] In the figure, 1. Box body, 2. Distribution cabinet room, 201. Distribution cabinet, 202. Fire extinguisher, 3. Water treatment equipment room, 301. Raw water tank, 302. Pure water machine, 303. Water supply pump, 304. Dosing system, 305. Pure water tank, 306. Alkali preparation tank, 4. Air compressor equipment room, 401. Air compressor, 402. Dryer, 5. Output equipment room, 501. Compressed air buffer tank, 502. Nitrogen container and bus, 503. Water supply pump, 504. Alkali supply pump, 6. Power input port, 7. Water source input port, 8. Air input port, 9. Instrument gas output port, 10. Raw water output port, 11. Alkali solution output port, 12. Purge gas output port. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1 The present invention is used for auxiliary equipment of skid-mounted alkaline water electrolysis hydrogen production system, such as Figure 1As shown, the system comprises a housing 1 housing a power distribution cabinet room 2 for power supply. This cabinet room 2 is connected via wiring to a water treatment room 3, an air compressor room 4, and an output room 5, all located within the housing 1. The water treatment room 3 processes raw water to produce pure water, which is then used for replenishment or to prepare alkali solution for delivery to the hydrogen production system. The air compressor room 4 compresses, dries, and filters air, producing clean, high-pressure gas that is used to supply the pneumatic actuators of the hydrogen production system. The output room 5 primarily connects to the various pipelines of the hydrogen production system, transporting raw materials prepared by auxiliary equipment to the hydrogen production system.

[0020] Furthermore, box 1 is equipped with a power input port 6 for connecting to an external power source, located opposite the power distribution cabinet room 2; a water input port 7, located opposite the water treatment equipment room 3; an air input port 8, located opposite the air compressor equipment room 4; and an instrument air outlet 9, a raw water outlet 10, an alkali liquid outlet 11, and a purge air outlet 12, located opposite the output equipment room 5. Cable inlets utilize glands, and gas and water pipeline inlets and outlets utilize flange connections for easy on-site installation. Sewage lines from various equipment within box 1 are integrated into a single location for centralized discharge.

[0021] Furthermore, partition walls are set between the distribution cabinet room 2, the water treatment equipment room 3, the air compressor equipment room 4 and the output equipment room 5 to ensure the safety of independent installation of the main electrical, gas and water equipment. The pipes connecting various types of equipment are all set at the bottom of the box 1, and the pipes pass through the partition wall from the bottom of the box 1.

[0022] Example 2 The auxiliary equipment of the skid-mounted alkaline water electrolysis hydrogen production system includes a box body 1, in which a power distribution cabinet room 2, a water treatment equipment room 3, an air compressor equipment room 4 and an output equipment room 5 are arranged.

[0023] The water treatment equipment room 3 includes a raw water tank 301 and an alkali preparation tank 306 fixedly connected to the inside of the box body 1. The raw water tank 301 is connected to the raw water through the water source input port 7. The raw water tank 301 is connected to the pure water machine 302 through a pipeline. In the pure water machine 302, particulate matter, Fe, Cl and other ions are removed through filtration, reverse osmosis, electric desalination and other processes to obtain pure water that meets the electrolysis requirements. The pure water machine model is LDM-IE-2000 (4040-2). The water outlet of the pure water machine 302 is connected to the water supply pump 303 through a pipeline. The water outlet of the water supply pump 303 is connected to the pure water tank 305 through a pipeline. The pure water in the pure water machine 302 enters the pure water tank 305 under the action of the water supply pump 303.

[0024] Furthermore, a water suction pump is provided in the water purifier 302 , and the water inlet of the water suction pump is connected to the raw water tank 301 through a pipeline.

[0025] Furthermore, the water outlet of the pure water tank 305 is connected to two pipelines, one pipeline is connected to the output equipment room 5, and is connected to the water supply pipeline of the alkaline water electrolysis hydrogen production system through the raw water output port 10, for electrolysis reaction to produce hydrogen; the other pipeline is connected to the alkali preparation tank 306, which is used to prepare the alkali solution required for the hydrogen production system. The alkali preparation tank 306 is equipped with an automatic feeding hopper, a stirrer and an alkali solution concentration analyzer to realize automatic dosing and stirring and online concentration detection. The water outlet of the alkali preparation tank 306 is connected to the output equipment room 5, and the alkali solution with qualified concentration is connected to the alkali solution pipeline of the alkaline water electrolysis hydrogen production system through the alkali solution output port 11.

[0026] The air compressor equipment room 4 includes an air compressor 401 fixedly connected to the inner wall of the box body 1. The air inlet of the air compressor 401 is arranged relative to the air input port 8. The air outlet of the air compressor 401 is connected to the dryer 402 through a pipeline. The air is compressed and pressurized by the air compressor 401 and then enters the dryer 402 to remove moisture from the air. The model of the air compressor 401 is HMD7.5-10 screw air compressor.

[0027] Various levels of filters are installed before and after the dryer 402. The model of the dryer 402 is HAL-1.3-M membrane dryer, which can effectively filter oil and dust in the compressed air to meet the quality requirements of instrument air. The air outlet of the dryer 402 is connected to the output equipment room 5 through a pipeline.

[0028] Output device room 5 includes the following devices: The compressed air buffer tank 501 is connected to the dryer 402 through a pipeline and supplies air to the pneumatic actuators of the alkaline water electrolysis hydrogen production system through the instrument air outlet 9; KKJZ-25 nitrogen container and busbar 502, in which national standard hydrogen storage cylinders are installed. Nitrogen container and busbar 502 are connected to the nitrogen filling pipeline of the alkaline water electrolysis hydrogen production system through the purge gas outlet 12 via a pipeline; The water supply pump 503 is connected to the pure water tank 305 through a pipeline, and the pure water is connected to the water supply pipeline through the raw water output port 10; Alkali replenishing pump 504, alkali replenishing pump 504 is connected to alkali preparation tank 306 through a pipeline, and the alkali solution prepared by alkali preparation tank 306 is connected to the alkali solution pipeline through the alkali solution output port 11; The compressed air buffer tank 501 , the nitrogen container grid and bus 502 , the water supply pump 503 and the alkali supply pump 504 are all fixedly connected to the interior of the box body 1 .

[0029] Furthermore, the distribution cabinet room 2 includes a distribution cabinet 201 and a fire extinguisher 202. The distribution cabinet 201 is fixedly connected to the box body 1 and is connected to the electrical equipment in the water treatment equipment room 3, the air compressor equipment room 4 and the output equipment room 5 through lines. The external power supply is connected to the distribution cabinet 201 through the power input port 6.

[0030] Specifically, the prying force enters the distribution cabinet 201 through the power input port 6, and the distribution cabinet 201 supplies power to the electrical equipment such as the pure water machine 302, the alkali preparation box 306, the air compressor 401, the dryer 402, the nitrogen container and bus 502, the water supply pump 503, and the alkali supply pump 504.

[0031] Furthermore, the box body 1 is provided with double doors relative to the power distribution cabinet room 2, the water treatment equipment room 3, the air compressor equipment room 4 and the output equipment room 5 for operation and maintenance of the equipment.

[0032] Example 3 On the basis of Example 2, a dosing system 304 is provided above the water purifier 302 in the auxiliary equipment of the skid-mounted alkaline water electrolysis hydrogen production system of the present invention, and a pressure gauge and a conductivity meter are provided at the water outlet of the water purifier 302. When the water quality and pressure drop, the dosing system 304 adds scale inhibitor into the water purifier 302.

[0033] When using the auxiliary equipment of the skid-mounted alkaline water electrolysis hydrogen production system of the present invention, the equipment in the power distribution cabinet room 2, the water treatment equipment room 3, the air compressor equipment room 4 and the output equipment room 5 are first installed and fixed inside the box body 1, and then the box body 1 is transported as a whole to the site and connected and installed with the hydrogen production system. The power input port 6 is connected to the power supply through a gland to supply power to various electrical equipment in the auxiliary equipment. The water source input port 7, the air input port 8, the instrument gas output port 9, the raw water output port 10, the alkali solution output port 11 and the purge gas output port 12 are all connected to the corresponding pipelines through flanges before normal use.

Claims

1. Auxiliary equipment for skid-mounted alkaline water electrolysis hydrogen production system, characterized in that: The invention comprises a box body (1), wherein a power distribution cabinet room (2) for power supply is provided in the box body (1), and the power distribution cabinet room (2) is connected to a water treatment equipment room (3), an air compressor equipment room (4), and an output equipment room (5) provided in the box body (1) through lines; the box body (1) is provided with a power input port (6) for connecting to an external power supply at a position relative to the power distribution cabinet room (2); the box body (1) is provided with a water source input port (7) at a position relative to the water treatment equipment room (3); the box body (1) is provided with an air input port (8) at a position relative to the air compressor equipment room (4); and the box body (1) is provided with an instrument gas output port (9), a raw water output port (10), an alkali solution output port (11), and a purge gas output port (12) at a position relative to the output equipment room (5).

2. The auxiliary equipment for the skid-mounted alkaline water electrolysis hydrogen production system according to claim 1, characterized in that: The water treatment equipment room (3) comprises a raw water tank (301) and an alkali preparation tank (306) fixedly connected to the interior of the box body (1); the raw water tank (301) is connected to the raw water tank (301) via a water source input port (7); the raw water tank (301) is connected to a pure water machine (302) via a pipeline; the water outlet of the pure water machine (302) is connected to a water supply pump (303) via a pipeline; the water outlet of the water supply pump (303) is connected to a pure water tank (305) via a pipeline; the pure water in the pure water machine (302) enters the pure water tank (305) under the action of the water supply pump (303); The water outlet of the pure water tank (305) is connected to two pipelines, one pipeline is connected to the output equipment room (5), and is connected to the water supply pipeline of the alkaline water electrolysis hydrogen production system through the raw water output port (10); the other pipeline is connected to the alkali preparation tank (306), and the alkali preparation tank (306) is equipped with an automatic feeding hopper, a stirrer and an alkali solution concentration analyzer. The water outlet of the alkali preparation tank (306) is connected to the output equipment room (5), and is connected to the alkali solution pipeline of the alkaline water electrolysis hydrogen production system through the alkali solution output port (11).

3. The auxiliary equipment for the skid-mounted alkaline water electrolysis hydrogen production system according to claim 2, characterized in that: A dosing system (304) is provided above the water purifier (302), and a pressure gauge and a conductivity meter are provided at the water outlet of the water purifier (302). When the water quality and pressure drop, the dosing system (304) adds scale inhibitor into the water purifier (302).

4. The auxiliary equipment for the skid-mounted alkaline water electrolysis hydrogen production system according to claim 2, characterized in that: A water suction pump is provided in the water purifier (302), and the water inlet of the water suction pump is connected to the raw water tank (301) through a pipeline.

5. The auxiliary equipment for the skid-mounted alkaline water electrolysis hydrogen production system according to claim 2, characterized in that: The air compressor equipment room (4) includes an air compressor (401) fixedly connected to the inner wall of the box (1), the air inlet of the air compressor (401) is arranged relative to the air input port (8), the air outlet of the air compressor (401) is connected to a dryer (402) through a pipeline, and the dryer (402) is used to filter oil and dust in the compressed air. The air outlet of the dryer (402) is connected to the output equipment room (5) through a pipeline.

6. The auxiliary equipment for the skid-mounted alkaline water electrolysis hydrogen production system according to claim 5, characterized in that: The output device room (5) includes the following devices: A compressed air buffer tank (501), the compressed air buffer tank (501) is connected to the dryer (402) through a pipeline and supplies air to each pneumatic actuator of the alkaline water electrolysis hydrogen production system through an instrument air outlet (9); A nitrogen container grid and busbar (502), wherein the nitrogen container grid and busbar (502) are connected to a nitrogen filling pipeline of an alkaline water electrolysis hydrogen production system through a purge gas outlet (12); A water supply pump (503), the water supply pump (503) is connected to the pure water tank (305) through a pipeline, and the pure water is connected to the water supply pipeline through the raw water output port (10); an alkali replenishing pump (504), the alkali replenishing pump (504) being connected to the alkali preparation tank (306) via a pipeline, and connecting the alkali solution prepared in the alkali preparation tank (306) to the alkali solution pipeline via the alkali solution output port (11); The compressed air buffer tank (501), the nitrogen container grid and busbar (502), the water supply pump (503) and the alkali supply pump (504) are all fixedly connected to the interior of the box (1).

7. The auxiliary equipment for the skid-mounted alkaline water electrolysis hydrogen production system according to claim 6, characterized in that: A national standard hydrogen storage cylinder is installed in the nitrogen container.

8. The auxiliary equipment for the skid-mounted alkaline water electrolysis hydrogen production system according to any one of claims 2 to 7, characterized in that: A partition wall is provided between the power distribution cabinet room (2), the water treatment equipment room (3), the air compressor equipment room (4) and the output equipment room (5), and the pipelines connecting the various types of equipment are all provided at the bottom of the box body (1), and the pipelines pass through the partition wall from the bottom of the box body (1).

9. The auxiliary equipment for the skid-mounted alkaline water electrolysis hydrogen production system according to claim 1, characterized in that: The power distribution cabinet room (2) comprises a power distribution cabinet (201) and a fire extinguisher (202). The power distribution cabinet (201) is fixedly connected to the box body (1) and is connected to the electrical equipment in the water treatment equipment room (3), the air compressor equipment room (4) and the output equipment room (5) through lines. The external power supply is connected to the power distribution cabinet (201) through the power input port (6).

10. The auxiliary equipment for the skid-mounted alkaline water electrolysis hydrogen production system according to claim 1, characterized in that: The box body (1) is provided with double doors relative to the power distribution cabinet room (2), the water treatment equipment room (3), the air compressor equipment room (4) and the output equipment room (5) for operation and maintenance of the equipment.

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