Small-sized integrated double-temperature-zone cooling-water machine of PEM water electrolysis hydrogen production system

Abstract

The invention discloses a small-sized integrated double-temperature-zone water chiller of a PEM water electrolysis hydrogen production system. The small-sized integrated double-temperature-zone water chiller comprises a partition plate with a thermal insulation layer in a water tank, a cold water tank and a hydrogen production water tank, a liquid level balance hole formed in the bottom to adjust the liquid level difference, a water injection hole formed in the bottom of the cold water tank, a water supplementing pipe arranged on the top of the hydrogen production water tank, independent water supplementing and double-temperature-zone integration to save space; the hydrogen production system comprises a circulating water pump, a compressor, a condenser and the like, the circulating water pump injects cold water into the cold water tank, the condenser and the compressor are connected with an evaporator through pipelines, the evaporator is arranged in the cold water tank, and an electric actuator is connected with the two tanks and can control cold water circulation; the temperature transmitter monitors the temperature of the two boxes and dynamically adjusts the temperature; the liquidometer is matched with the water supplementing pipe to keep the liquid level, and automation and reliability of the system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen production by electrolysis of water, and particularly relates to a double-temperature-zone water tank integrated into a PEM hydrogen production system by electrolysis of water. BACKGROUND

[0002] PEM hydrogen production by electrolysis of water is a technology for producing hydrogen by electrolysis of water through a proton exchange membrane, noble metal catalyst and bipolar plate. The technology has the characteristics of high hydrogen purity and fast dynamic response, can be directly adapted to fluctuating renewable energy such as wind power and photovoltaic power, and realizes zero carbon emission in the whole process. The technical principle is that water molecules are decomposed into oxygen and hydrogen ions under the action of iridium catalyst at the anode, and the hydrogen ions migrate to the cathode through the proton exchange membrane and combine with electrons on the surface of the platinum catalyst to generate hydrogen.

[0003] The existing complete set of hydrogen production by electrolysis of water needs a hydrogen production machine by electrolysis of water, cooperates with a water chiller or cooling tower, and when the hydrogen outlet pressure does not meet the customer's demand, a booster mechanism is also needed. A general hydrogen production system by electrolysis of water is composed of an electrolysis tank, an electrolysis power supply, a water-gas separation device, a purification device, a collection controller, a hydrogen production water tank, a water chiller and other main components. The whole running device occupies a large area, has many connecting pipelines between the devices, has high difficulty in collaborative work, is relatively complicated, has low running efficiency, has high system failure rate, and is not convenient for maintenance and replacement.

[0004] Therefore, it is necessary to invent a double-temperature-zone water tank integrated into a small PEM hydrogen production system by electrolysis of water to solve the above problems. SUMMARY

[0005] (I) Invention purpose The purpose of the present application is to provide a small integrated double-temperature-zone water chiller for a PEM hydrogen production system by electrolysis of water.

[0006] (II) Technical scheme In order to achieve the above purpose, the present application provides the following technical scheme: a small integrated double-temperature-zone water chiller for a PEM hydrogen production system by electrolysis of water, comprising a box body, wherein a top cover is installed on the top of the box body, support feet are installed on the four corners of the bottom of the box body, and a support bottom plate is arranged at the bottom of the support feet; A partition plate is arranged in the box body, one side of the partition plate is provided with a cold water tank, and the other side is provided with a hydrogen production water tank; A temperature insulation layer is arranged in the partition plate, a liquid level balance hole is further arranged at the bottom of the partition plate, the liquid level balance hole balances the liquid level difference between the cold water tank and the hydrogen production water tank, and a water injection hole is further arranged at the bottom of the cold water tank; A circulating water pump and a compressor are installed on the support bottom plate, one end of the circulating water pump extends a cold water inlet, the other end of the circulating water pump is connected to the water injection hole, and cold water is injected into the cold water tank; The condenser is installed between the two supporting legs on the bottom side, and the condenser and the compressor are jointly connected with the evaporator through a pipeline; An electric actuator is installed above the top cover, one side of the electric actuator is provided with a connecting pipe, both ends of the connecting pipe are connected with the cold water tank and the hydrogen water tank respectively, and a cold water outlet extends from one side of the connecting pipe; A temperature transmitter is installed on the top of the cold water tank and the hydrogen water tank; A liquid level meter and a water supplement pipe are also installed on the top of the top cover, the liquid level meter extends to the hydrogen water tank, and the water supplement pipe is arranged on the top of the hydrogen water tank.

[0007] Preferably, a plurality of mounting holes are formed in the top cover, the diameters of the mounting holes are matched with the installation equipment, two mounting holes are arranged on the top of the cold water tank, one end of the connecting pipe and the temperature transmitter are installed in the two mounting holes respectively, and four mounting holes are arranged on the top of the hydrogen water tank, the connecting pipe, the temperature transmitter, the liquid level meter and the water supplement pipe are installed in the four mounting holes respectively.

[0008] Preferably, a plurality of through holes are arranged on the top cover, the through holes are arranged on the top of the cold water tank, the pipeline between the condenser and the compressor passes through the through holes, and the evaporator is arranged in the cold water tank through the through holes.

[0009] Preferably, the overall size of the cold water tank is smaller than the overall size of the hydrogen water tank, and the tank is coated with a heat preservation layer.

[0010] Preferably, the temperature insulation layer is a polyurethane temperature insulation layer, and the partition plate is a stainless steel double-layer partition plate.

[0011] Preferably, two groups of heat dissipation fans are installed on the condenser, and a drying filter is arranged on one side of the condenser.

[0012] Preferably, the electric actuator controls the temperature in the hydrogen water tank by controlling the amount of water entering the hydrogen water tank from the cold water tank.

[0013] Preferably, two groups of temperature transmitters are arranged on the top of the cold water tank and the hydrogen water tank respectively.

[0014] Compared with the prior art, the above technical scheme of the present application has the following beneficial effects: 1. The cooling water and hydrogen production water of the cold water machine adopt the same water tank design, which can ensure that the hydrogen production water quantity meets the hydrogen production requirement, since the working temperatures of the cooling water and the hydrogen production water of the cold water machine are different, a double-layer stainless steel partition plate is arranged in the tank body, and the middle part is filled with a polyurethane heat preservation layer for effective temperature insulation, a liquid level balance hole for balancing the water level is arranged at the bottom, so that the liquid levels of the cooling water area and the hydrogen production water area can be balanced, the outer surface of the water tank is covered with a heat preservation layer, which can effectively reduce the energy consumption of the device, and also reduce the generation of condensed water; 2. The cooling circulating water adopts a single cooling water circulating pump to cool the gas-water separation and other equipment, the cooling water temperature is generally 3-10 DEG C, and the temperature is controlled in real time through the acquisition controller; the hydrogen production water temperature generally needs to be controlled at 30-60 DEG C, when the temperature reaches the set value, the cooling water exchange amount is controlled through the proportional adjustment of the electric actuator of the acquisition controller to achieve the purpose of accurate temperature control; the hydrogen production water temperature is controlled through the adjustment of the electric actuator, which can reduce the use of the circulating water pump, reduce the use frequency of the equipment parts, further reduce the equipment space, and achieve the purpose of small integration. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0016] Figure 1 The overall structure of the present application Figure 1 ; Figure 2 The overall structure of the present application Figure 2 ; Figure 3 The tank body and internal equipment of the present application are shown in the structure diagram. Figure 4 The side structure of the present application is shown in the structure diagram. Figure 5 The overall split structure of the tank body of the present application is shown in the structure diagram. Figure 6 The overall structure of the tank body of the present application is shown in the structure diagram.

[0017] Explanation of reference signs: 1, box; 11, top cover; 111, mounting hole; 112, through hole; 12, support foot; 13, support bottom plate; 14, partition plate; 15, cold water tank; 16, hydrogen water tank; 17, temperature insulation layer; 18, liquid level balance hole; 19, water injection hole; 2, circulating water pump; 21, cold water inlet; 3, compressor; 4, condenser; 41, cooling fan; 5, evaporator; 6, electric actuator; 61, connecting pipe; 62, cold water outlet; 7, temperature transmitter; 8, liquid level meter; 9, water supply pipe; 10, drying filter. DETAILED DESCRIPTION

[0018] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the drawings.

[0019] The present application provides a small integrated double-temperature-zone cold water machine for a PEM electrolytic water hydrogen production system as shown in Figures 1-6 The box 1 is provided with a top cover 11 on the top, support feet 12 on the bottom corners, and a support bottom plate 13 at the bottom of the support feet 12. Specifically, the box 1 is provided with a partition plate 14, one side of which is a cold water tank 15 and the other side is a hydrogen water tank 16. Specifically, the partition plate 14 is provided with a temperature insulation layer 17 inside, and a liquid level balance hole 18 at the bottom of the partition plate 14, which balances the liquid level difference between the cold water tank 15 and the hydrogen water tank 16 on both sides. The cold water tank 15 is further provided with a water injection hole 19 at the bottom.

[0020] Specifically, the top cover 11 is provided with a plurality of mounting holes 111, the diameters of which are matched with the installation equipment. The cold water tank 15 is provided with two mounting holes 111 at the top, and the hydrogen water tank 16 is provided with four mounting holes 111 at the top.

[0021] Specifically, the top cover 11 is further provided with a plurality of through holes 112, which are arranged at the top of the cold water tank 15.

[0022] Specifically, the overall size of the cold water tank 15 is smaller than that of the hydrogen water tank 16, and the box 1 is covered with a thermal insulation layer.

[0023] Specifically, the temperature insulation layer 17 is a polyurethane temperature insulation layer, and the partition plate 14 is a stainless steel double-layer partition plate.

[0024] In the application, the box body 1 is installed with support feet 12 at the bottom of four corners, and then the support bottom plate 13 is fixed at the bottom of the support feet 12 to form a stable support structure. Then the top cover 11 is installed on the top of the box body 1, and a plurality of mounting holes 111 and through holes 112 are pre-formed on the top cover 11, wherein two mounting holes 111 are arranged on the top of the cold water tank 15, four mounting holes 111 are arranged on the top of the hydrogen water tank 16, and a plurality of through holes 112 are arranged on the top of the cold water tank 15, and the diameters of the mounting holes 111 are matched with the equipment to be installed.

[0025] Specifically, the partition plate 14 is installed in the box body 1, the partition plate 14 is made of stainless steel double-layer material, and the inside is provided with a polyurethane temperature insulation layer 17, so that one side of the box body 1 is divided into a cold water tank 15 and the other side is divided into a hydrogen water tank 15, and the overall size of the cold water tank 15 is smaller than that of the hydrogen water tank 16. At the same time, the liquid level balance hole 18 is arranged at the bottom of the partition plate 14 for balancing the liquid level difference of the water tanks on both sides, and the water injection hole 19 is arranged at the bottom of the cold water tank 15.

[0026] Specifically, the box body 1 is coated with a heat preservation layer to reduce the heat exchange between the water tank and the external environment and maintain the stable temperature in the box.

[0027] Referring to Figures 1-3 , the circulating water pump 2 is fixed on the support bottom plate 13, one end of the circulating water pump 2 extends with a cold water inlet 21, the other end of the circulating water pump 2 is connected with the water injection hole 19, and the cold water is injected into the cold water tank 14; Specifically, the compressor 3 is fixed on the support bottom plate 13; Specifically, the condenser 4 is installed between the two support feet 12 at the bottom, and the condenser 4 and the compressor 3 are connected with the evaporator 5 through the pipeline, and the pipeline places the evaporator 5 in the cold water tank 15 through the through hole 112; Specifically, the electric actuator 6 is installed above the top cover 11, one side of the electric actuator 6 is provided with a connecting pipe 61, both ends of the connecting pipe 61 are connected with the mounting holes 111 on the top of the cold water tank 15 and the hydrogen water tank 16, and one side of the connecting pipe 61 extends with a cold water outlet 62; Specifically, the temperature transmitter 7 is arranged on the top of the cold water tank 15 and the hydrogen water tank 16; Specifically, the liquid level meter 8 is installed in the mounting hole 111 on the top of the top cover 11, and the bottom of the liquid level meter 8 extends into the hydrogen water tank 16; Specifically, the water supplement pipe 9 is installed in the mounting hole 111 on the top of the top cover 11, and is arranged on the top of the hydrogen water tank 16 Referring to Figures 1-3Two groups of heat dissipation fans 41 are installed on one side of the condenser 4, and a drying filter 10 is also arranged on one side of the condenser 4, Specifically, the electric actuator 6 controls the temperature in the hydrogen production water tank 16 by controlling the amount of water in the cold water tank 15 entering the hydrogen production water tank 16. Specifically, the temperature transmitter 7 is provided with two groups, which are respectively installed on the top of the cold water tank 15 and the hydrogen production water tank 16.

[0028] In the present application, the circulating water pump 2 is fixed on the support bottom plate 13, one end of which extends out of the cold water inlet 21, and the other end is connected to the water injection hole 19 at the bottom of the cold water tank 15. The compressor 3 is also fixed on the support bottom plate 13, and the condenser 4 is installed between the two support feet 12 at the bottom, and two groups of heat dissipation fans 41 and a drying filter 10 are installed on one side of the condenser 4.

[0029] Specifically, the condenser 4 and the compressor 3 are connected to the evaporator 5 through a pipeline, the pipeline passes through the through hole 112 on the top cover 11, and the evaporator 5 is placed in the cold water tank 15. The electric actuator 6 is installed above the top cover 11, and the connecting pipe 61 on one side of the electric actuator 6 is connected to the installation hole 111 on the top of the cold water tank 15 and the hydrogen production water tank 16, respectively, and the connecting pipe 61 extends out of the cold water outlet 62.

[0030] Specifically, two groups of temperature transmitters 7 are respectively installed on the top of the cold water tank 15 and the hydrogen production water tank 16 for monitoring the temperature of the two water tanks. The liquid level meter 8 is installed in the installation hole 111 on the top of the top cover 11 corresponding to the hydrogen production water tank 16, and the bottom of the liquid level meter 8 extends into the hydrogen production water tank 16 for monitoring the liquid level of the hydrogen production water tank 16. The water replenishing pipe 9 is installed in the installation hole 111 on the top of the top cover 11 corresponding to the hydrogen production water tank 16 for replenishing water to the hydrogen production water tank 16.

[0031] In the present application, the electric actuator 6 can accurately control the temperature in the hydrogen production water tank 16 by controlling the amount of water in the cold water tank 15 entering the hydrogen production water tank 16. At the same time, the two groups of temperature transmitters 7 respectively monitor the temperature of the cold water tank 15 and the hydrogen production water tank 16 in real time, providing accurate data basis for temperature control, and ensuring that the hydrogen production reaction is carried out under suitable temperature conditions. In the present application, the liquid level balance hole 18 at the bottom of the partition plate 14 can effectively balance the liquid level difference between the cold water tank 15 and the hydrogen production water tank 16, avoiding the problem of unstable system operation caused by unbalanced liquid level. The liquid level meter 8 can monitor the liquid level of the hydrogen production water tank 16 in real time, and replenish water in time through the water replenishing pipe 9 to ensure the continuous progress of the hydrogen production process. The heat preservation layer outside the box body 1 and the polyurethane temperature insulation layer 17 in the partition plate 14 can significantly reduce heat transfer, so that the cold water tank 15 and the hydrogen production water tank 16 can maintain a relatively stable temperature environment respectively, energy consumption is reduced, and the operation efficiency of the system is improved. In the application, the circulating water pump 2, the compressor 3, the condenser 4 and the evaporator 5 and other equipment work cooperatively to form an effective refrigeration cycle, so that the cold water tank 15 can be provided with continuous cold water supply, and the stable and efficient operation of the whole hydrogen production system is ensured.

[0032] It is worth mentioning that the integrated double-temperature-zone water tank is small in size, the electrolytic water hydrogen production system is installed in the integrated double-temperature-zone water tank, the purification unit in the small hydrogen production system is cooled, and the electrolytic water tank is cooled, so that the whole equipment is small in size, the medium container is provided by the box body, the volume of the whole equipment is changed, and the cooling of the internal equipment is facilitated.

[0033] The above only describes some exemplary embodiments of the application by way of illustration, and it is needless to say that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the application. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the application.

Claims

1. A small integrated dual-temperature-zone cold water machine for a PEM electrolytic water hydrogen production system, characterized by: Including box (1), the top of the box (1) is provided with a top cover (11), and the bottom four corners are provided with supporting legs (12), and the bottom of the supporting legs (12) is provided with a supporting bottom plate (13) in common; The box (1) is provided with a partition plate (14) inside, one side of the partition plate (14) is provided with a cold water tank (15), and the other side is provided with a hydrogen water tank (16); The partition plate (14) is provided with a temperature insulation layer (17) inside, and the partition plate (14) is further provided with a liquid level balance hole (18) at the bottom, the liquid level balance hole (18) balances the liquid level difference of the cold water tank (15) and the hydrogen water tank (16) on both sides, and the cold water tank (15) is further provided with a water injection hole (19) at the bottom; The supporting bottom plate (13) is provided with a circulating water pump (2) and a compressor (3), one end of the circulating water pump (2) extends a cold water inlet (21), the other end is connected with the water injection hole (19), and cold water is injected into the cold water tank (14); The condenser (4) is installed between the supporting legs (12) on both sides of the bottom, and the condenser (4) and the compressor (3) are connected with an evaporator (5) through a pipeline in common; The top cover (11) is provided with an electric actuator (6) above, one side of the electric actuator (6) is provided with a connecting pipe (61), both ends of the connecting pipe (61) are connected with the top of the cold water tank (15) and the hydrogen water tank (16) respectively, and one side of the connecting pipe (61) extends a cold water outlet (62); The cold water tank (15) and the hydrogen water tank (16) are provided with a temperature transmitter (7) on the top; The top cover (11) is further provided with a liquid level meter (8) and a water supplement pipe (9) on the top, the liquid level meter (8) extends into the hydrogen water tank (16) at the bottom, and the water supplement pipe (9) is arranged on the top of the hydrogen water tank (16), and the above-mentioned equipment is used for PEM electrolytic water hydrogen system.

2. The small integrated dual-temperature zone cold water machine of the PEM water electrolysis hydrogen production system according to claim 1, characterized in that: A plurality of mounting holes (111) are formed in the top cover (11), the diameters of the mounting holes (111) are matched with the installation equipment, two mounting holes (111) are arranged on the top of the cold water tank (15), and one end of the connecting pipe (61) and the temperature transmitter (7) are arranged in the two mounting holes (111) respectively, four mounting holes (111) are arranged on the top of the hydrogen water tank (16), and the other end of the connecting pipe (61), the temperature transmitter (7), the liquid level meter (8) and the water supplement pipe (9) are arranged in the four mounting holes (111) respectively.

3. The small integrated dual-temperature zone cold water machine of the PEM water electrolysis hydrogen production system according to claim 1, characterized in that: The top cover (11) is further provided with a plurality of through holes (112), a plurality of through holes (112) are arranged on the top of the cold water tank (15), the pipeline between the condenser (4) and the compressor (3) passes through the through holes (112), and the pipeline places the evaporator (5) in the cold water tank (15) through the through holes (112).

4. The small integrated dual temperature zone cold water machine of a PEM electrolytic water hydrogen system according to claim 1, characterized in that: The overall size of the cold water tank (15) is smaller than that of the hydrogen water tank (16), and the box (1) is covered with a heat preservation layer.

5. A small integrated dual temperature zone cold water machine for a PEM electrolytic water splitting hydrogen generation system according to claim 1, characterized in that: The temperature insulation layer (17) is a polyurethane temperature insulation layer, and the partition plate (14) is a stainless steel double-layer partition plate.

6. A small integrated dual temperature zone cold water machine for a PEM electrolytic water splitting hydrogen generation system according to claim 1, characterized in that: Two groups of heat dissipation fans (41) are installed on the condenser (4), and a drying filter (10) is arranged on one side of the condenser (4).

7. A small integrated dual temperature zone cold water machine for a PEM electrolytic water splitting hydrogen generation system according to claim 1, characterized in that: The electric actuator (6) controls the temperature in the hydrogen production water tank (16) by controlling the amount of water in the hydrogen production water tank (16) from the cold water tank (15).

8. A small integrated dual temperature zone cold water machine for a PEM electrolytic water splitting hydrogen generation system according to claim 1, characterized in that: The temperature transmitter (7) is provided with two groups, which are respectively installed on the top of the cold water tank (15) and the hydrogen production water tank (16).

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