Alkaline water electrolysis hydrogen production device system

Abstract

The utility model provides an alkaline water electrolysis hydrogen production device system. The alkaline water electrolysis hydrogen production device system comprises an alkaline electrolytic bath, a hydrogen-alkali liquor separator, an oxygen-alkali liquor separator, an alkali liquor cooler and an alkali liquor-heat source heat exchanger, the alkaline electrolytic bath is respectively connected with the hydrogen-alkaline liquid separator and the oxygen-alkaline liquid separator; the hydrogen-alkali liquor separator and the oxygen-alkali liquor separator are both connected with the alkali liquor cooler; the alkali liquor cooler, the alkali liquor-heat source heat exchanger and the alkaline electrolytic bath are connected in sequence; and the alkaline bath heat insulation sleeve is arranged outside the alkaline electrolytic bath. The alkaline water electrolysis hydrogen production device system is simple in structure and reasonable in design, realizes rapid cold start, improves the operation efficiency, and is suitable for large-scale application in a photovoltaic, wind power and other renewable energy source coupling alkaline water electrolysis hydrogen production system.

Description

Technical Field

[0001] The utility model relates to the technical field of alkaline electrolyzed water hydrogen production, in particular to an alkaline electrolyzed water hydrogen production device system. Background Technique

[0002] Hydrogen energy is a clean and carbon-free energy with high energy density, having attributes such as an energy carrier, a storage carrier, and a chemical raw material. It can help large-scale consumption of renewable energy, achieve large-scale peak shaving of the power grid and cross-seasonal and cross-regional energy storage, and accelerate the low-carbonization of industries such as industry, construction, and transportation. In recent years, the coupling of renewable energy such as photovoltaic and wind power with the alkaline electrolyzed water hydrogen production process has been widely promoted and applied.

[0003] Due to the obvious randomness and volatility characteristics of renewable energy such as wind power and photovoltaic power, and the alkaline electrolyzed water hydrogen production system has certain requirements for the operating load (30% - 100%), there may be a problem of power failure in the alkali tank due to lack of wind and light in a certain time range in wind and photovoltaic power generation. Therefore, the alkaline electrolyzed water hydrogen production system often faces the problem of secondary startup after shutdown. Especially in the case of photovoltaic power generation, it cannot operate at night, which may cause the temperature of the alkali tank to drop to near room temperature. As is well known, the startup time of the alkaline electrolyzed water hydrogen production system is relatively long. During the startup process, only about 25% of its own total power is used for system heating, resulting in a slow heating rate. It takes more than 3 hours to cold start from about 20°C to the normal working temperature of 85°C.

[0004] The deficiencies of the traditional alkaline electrolyzed water hydrogen production system are as follows: ① At low temperature (<30°C), only about 25% of its own total power is used for heating the circulating alkali liquid in the system, and the overall heating rate of the alkali liquid is relatively slow; ② The alkali tank is not provided with a heat preservation device, resulting in a temperature difference between the alkaline electrolytic cell itself and the outside air during the cold startup process, and a considerable amount of heat will be lost due to heat transfer, further slowing down the rise of the alkali liquid temperature in the alkali tank; ③ During the heating process of the alkali tank, due to the low temperature of the alkali liquid (<80°C), a mass transfer process cannot be effectively formed, hydrogen cannot be normally produced, and the purification system cannot be started. The startup process of the alkali tank takes a long time (more than 3 hours). On the one hand, the system operation efficiency is low, and on the other hand, a large amount of photovoltaic and wind power may not be effectively utilized during the self-startup period, resulting in a large waste of renewable resource electric energy.

[0005] CN117684185A discloses an alkaline water electrolysis hydrogen production device and method. The device comprises an electrolyzer, a hydrogen separator, an oxygen separator, a heat exchanger, and a deoxygenation reactor. By providing a heat exchanger, the alkaline solution in the electrolyzer is used to exchange heat with the hydrogen, thereby reducing the relative humidity of the hydrogen and extending the service life of the deoxygenation catalyst. Furthermore, the temperature of the hydrogen is increased, and upon entering the deoxygenation reactor, efficient deoxygenation is achieved. The alkaline solution circulates within the device, ensuring the continuous stability of the electrolyte in the electrolyzer. Heat exchange within the device is achieved, improving operating efficiency and reducing energy consumption.

[0006] CN116752164A discloses a novel alkaline water electrolysis hydrogen production process system, comprising an electrolysis water hydrogen production purification system, an electrolysis water oxygen production purification system, an electrolyte circulation system, and a water (alkali) adding system. On the one hand, the hydrogen and oxygen gases produced by the electrolysis alkali solution enter a washing cooler after being separated by a gas-liquid separator and are washed and cooled, and then are merged into a collecting system by a film regulating valve after being dried and dehydrated by a drier, thereby reducing alkali content and water content therein to greatest extent. On the other hand, the washings recovered by the washing cooler and the electrolyte recovered by gas-liquid separation are gathered into an alkali adding tank and regulated alkalinity after being filtered through a filter, and then are imported into an electrolyzer after being filtered through a filter and heat exchanger, forming a closed-loop system.

[0007] CN115323419A discloses an alkaline water electrolysis hydrogen production device and a control method thereof. The alkaline water electrolysis hydrogen production device includes: an electrolytic cell suitable for electrolyte; a gas-liquid separation device connected to the outlet of the electrolytic cell; a heat control device including a selectively activated cooling system and a solar thermal system, wherein the cooling system is connected to both the gas-liquid separation device and the solar thermal system to cool the electrolyte to a preset temperature, and the solar thermal system is connected to the inlet of the electrolytic cell to heat the electrolyte to a preset temperature.

[0008] However, the above-mentioned alkaline water electrolysis hydrogen production device still has problems such as complex structure, slow alkali solution heating rate, and low water electrolysis hydrogen production efficiency. Utility Model Content

[0009] In view of the problems existing in the prior art, the utility model provides an alkaline water electrolysis hydrogen production device system. By arranging an alkali tank insulation jacket, an alkali solution-heat source heat exchanger, an air-heat source heat exchanger and an air heater, the alkali solution in the alkaline water electrolysis hydrogen production device system can be quickly heated up, and the entire system can be quickly cold-started, thereby improving the efficiency of water electrolysis hydrogen production.

[0010] To achieve this purpose, the present invention adopts the following technical solutions:

[0011] The present utility model provides an alkaline electrolyzed water hydrogen production device system, and the alkaline electrolyzed water hydrogen production device system includes an alkaline electrolytic cell, a hydrogen-alkali liquid separator, an oxygen-alkali liquid separator, an alkali liquid cooler, and an alkali liquid-heat source heat exchanger;

[0012] The alkaline electrolytic cell is respectively connected to the hydrogen-alkali liquid separator and the oxygen-alkali liquid separator; both the hydrogen-alkali liquid separator and the oxygen-alkali liquid separator are connected to the alkali liquid cooler; the alkali liquid cooler, the alkali liquid-heat source heat exchanger, and the alkaline electrolytic cell are connected in sequence;

[0013] The alkali tank heat insulation jacket is arranged outside the alkaline electrolytic cell.

[0014] The alkaline electrolyzed water hydrogen production device system of the present utility model includes an alkaline electrolytic cell, an alkali tank heat insulation jacket, a hydrogen-alkali liquid separator, an oxygen-alkali liquid separator, an alkali liquid cooler, and an alkali liquid-heat source heat exchanger. By using the alkali liquid-heat source heat exchanger to utilize an external heat source to rapidly heat up part of the alkali liquid, and at the same time by arranging the alkali tank heat insulation jacket to avoid the heat exchange and cooling between the surface of the alkali tank and the external ambient air, the rapid heating of the alkali liquid during the cold start process of the alkaline electrolyzed water hydrogen production device is realized, greatly reducing the start-up time of the alkaline electrolyzed water hydrogen production system. It can not only greatly improve the operation efficiency, but also ensure that the alkaline electrolyzed water hydrogen production device can quickly respond to renewable energy sources such as wind power and photovoltaic power with randomness and volatility through rapid start-up, and make full use of renewable energy.

[0015] The external heat source introduced into the alkali liquid-heat source heat exchanger of the present utility model can be a low-pressure steam heat source or a heat-conducting oil.

[0016] Preferably, the alkaline electrolyzed water hydrogen production device system further includes an alkali liquid buffer tank, a filter, and an alkali liquid circulation pump.

[0017] Preferably, the alkali liquid buffer tank is connected to the alkali liquid cooler through a first pipeline.

[0018] Preferably, a first stop valve is arranged on the first pipeline.

[0019] Preferably, the alkali liquid buffer tank is connected to the filter through a second pipeline.

[0020] Preferably, a second stop valve is arranged on the second pipeline.

[0021] Preferably, the alkali liquid cooler is connected to the filter through a third pipeline.

[0022] Preferably, a third stop valve is arranged on the third pipeline.

[0023] Preferably, the filter, the alkali liquid circulation pump, and the alkaline electrolytic cell are connected in sequence.

[0024] Preferably, a fourth stop valve is provided between the lye circulation pump and the alkaline electrolyzer.

[0025] Preferably, the lye circulation pump is connected to the lye-heat source heat exchanger through a fourth pipeline.

[0026] Preferably, a fifth stop valve is provided on the fourth pipeline.

[0027] Preferably, a sixth stop valve is provided between the lye-heat source heat exchanger and the alkaline electrolyzer.

[0028] Preferably, the lye-heat source heat exchanger is connected to an external heat source delivery pipeline.

[0029] Preferably, the first stop valve, the second stop valve, the third stop valve, the fourth stop valve, the fifth stop valve, and the sixth stop valve each independently include a pneumatic stop valve or an electric stop valve.

[0030] Preferably, the alkaline electrolyzed water hydrogen production device system further includes an air-heat source heat exchanger and an air heater.

[0031] Preferably, the air-heat source heat exchanger is connected to the lye-heat source heat exchanger to perform cascade multi-effect utilization of the external heat source, so as to give full play to the potential of the heat source, save the energy consumption of the air heater, and achieve comprehensive energy saving and consumption reduction of the alkaline electrolyzed water hydrogen production device system.

[0032] Preferably, the air-heat source heat exchanger, the air heater, and the lye tank heat insulation jacket are connected in sequence.

[0033] Preferably, the air-heat source heat exchanger is connected to an air delivery pipeline.

[0034] Preferably, the air heater includes any one of an electric air heater, a gas air heater, or a heat pump air heater.

[0035] Preferably, the lye tank heat insulation jacket includes a box-type frame structure and is composed of several frame modules.

[0036] The lye tank heat insulation jacket of the present utility model is easy to disassemble, assemble and transport, has excellent heat insulation effect, can effectively isolate the contact and heat exchange cooling between the alkaline electrolyzer and normal temperature air, and at the same time can provide heat for the alkaline electrolyzer in the reverse direction, achieving multiple benefits.

[0037] Preferably, a single frame module is composed of a frame unit, a heat insulation and heat preservation unit, and a fixing unit arranged in sequence.

[0038] In the present utility model, the frame unit supports one side of the heat insulation and heat preservation unit, and the fixing unit locks the other side of the heat preservation unit to obtain a single frame module; the lye tank heat insulation jacket is obtained by combining several frame modules.

[0039] Preferably, the frame unit includes a frame structure spliced by lightweight metal bars.

[0040] Preferably, the lightweight metal bars include stainless steel bars or aluminum alloy bars.

[0041] Preferably, the heat insulation unit is composed of a polyvinyl chloride shell and polyurethane insulating cotton arranged inside the polyvinyl chloride shell.

[0042] Preferably, the fixing unit includes a clamp.

[0043] The present utility model does not specifically limit the structure of the clamp, as long as it can fix the frame unit and the heat insulation unit together.

[0044] The frame unit in the present utility model is made of lightweight metal material, which is easy to carry; the heat insulation unit and the fixing unit are easy to install and disassemble; thus ensuring that the alkali tank heat insulation sleeve is easy to disassemble and assemble.

[0045] Preferably, the alkaline electrolytic water hydrogen production device system further includes an alkali liquid temperature control feedback system and an air temperature control feedback system.

[0046] Preferably, the alkali liquid temperature control feedback system is arranged between the alkali liquid circulation pump and the alkaline electrolytic cell, controlling the temperature of the alkali liquid entering the alkaline electrolytic cell to be 85 - 90 °C in the rapid heating stage, 75 - 80 °C in the transition startup stage; and 65 - 70 °C in the normal operation stage.

[0047] Preferably, the air temperature control feedback system is arranged between the air heater and the alkali tank heat insulation sleeve, and can control the output power of the air heater through the air temperature feedback in the alkali tank heat insulation sleeve, so as to ensure that the air inside the alkali tank heat insulation sleeve reaches the set temperature of 85 - 90 °C.

[0048] The operation method of the alkaline electrolytic water hydrogen production device system described in the present utility model includes a rapid heating stage, a transition startup stage and a normal operation stage, and the specific working processes are as follows:

[0049] (1) Rapid heating stage: The first stop valve, the second stop valve and the fourth stop valve are closed, the third stop valve, the fifth stop valve and the sixth stop valve are opened, and the alkaline electrolytic cell is not powered on;

[0050] About 50% of the designed circulating flow rate of the lye is pumped into the alkaline electrolyzer by the lye circulation pump, and then enters the hydrogen-lye separator and the oxygen-lye separator respectively. The lye passing through the hydrogen-lye separator and the oxygen-lye separator enters the filter after passing through the lye cooler without cooling water input, and then enters the lye-heat source heat exchanger under the action of the lye circulation pump, and exchanges heat with the external heat source: low-pressure steam with a temperature of 100-120°C and a pressure of 0.2-0.3 MPa or heat-conducting oil with a temperature of 100-200°C and a pressure of 0.3-0.5 MPa to increase the temperature. Through the control of the lye temperature control feedback system, the temperature of the lye is quickly increased to 85-90°C; the normal-temperature air with a pressure of 0.1-0.2 MPa from the air source exchanges heat with the air-heat source heat exchanger to obtain a preliminary temperature increase, and then enters the air heater. Through the control of the air temperature control feedback system, the temperature of the air in the heat insulation jacket of the lye tank is quickly increased, so as to prevent the lye tank from exchanging heat with the external air and cooling down;

[0051] (2) Transition startup stage: Open the first stop valve and the second stop valve, close the third stop valve, keep the fourth stop valve closed, keep the fifth stop valve and the sixth stop valve open, and the alkaline electrolyzer starts to operate under power;

[0052] About 50% of the designed circulating flow rate of the lye is pumped into the alkaline electrolyzer by the lye circulation pump, and then enters the hydrogen-lye separator and the oxygen-lye separator respectively. The lye passing through the hydrogen-lye separator and the oxygen-lye separator enters the lye buffer tank to mix with the remaining lye after passing through the lye cooler without cooling water input, and then enters the lye-heat source heat exchanger after passing through the filter and the lye circulation pump respectively, exchanges heat with the external heat source to increase the temperature. Through the control of the lye temperature control feedback system, the temperature of the lye is quickly increased to 75-80°C; the normal-temperature air with a pressure of 0.1-0.2 MPa from the air source exchanges heat with the air-heat source heat exchanger to obtain a preliminary temperature increase, and then enters the air heater. Through the control of the air temperature control feedback system, the temperature of the air in the heat insulation jacket of the lye tank is quickly increased, so as to prevent the lye tank from exchanging heat with the external air and cooling down; Together, the remaining lye in the lye buffer tank that has not been heated is quickly heated to the set temperature of 65-70°C, so as to meet the normal operating conditions of the system;

[0053] (3) Normal operation stage: Keep the third stop valve closed, keep the first stop valve and the second stop valve open, open the fourth stop valve, close the fifth stop valve and the sixth stop valve, keep the alkaline electrolyzer powered on, disconnect the air source and the external heat source, and turn on the cooling water of the lye cooler;

[0054] The lye circulation pump extracts lye with about 100% of the designed circulation flow rate and sends it into the alkaline electrolyzer. Then it enters the hydrogen-lye separator and the oxygen-lye separator respectively. After that, the lye passing through the hydrogen-lye separator and the oxygen-lye separator enters the lye cooler in the cooling water system to control the temperature of the circulating lye at 65 - 70°C, and then enters the lye buffer tank. Then it passes through the filter and the lye circulation pump respectively and enters the alkaline electrolyzer for circulation.

[0055] Compared with the prior art, the utility model has at least the following beneficial effects:

[0056] (1) An alkaline electrolytic water hydrogen production device system provided by the utility model, based on the traditional process system, integrates and applies an external heat source heating system, an external air multi-stage heating system, and an alkali tank heat insulation jacket, etc., to significantly reduce the cold start time, realize the rapid cold start of the system, and further improve the efficiency of electrolytic water hydrogen production. It is especially suitable for photovoltaic and wind power renewable energy-coupled alkaline electrolytic water hydrogen production systems with randomness and volatility. The cold start time of the system can be reduced to 30 minutes.

[0057] (2) The alkali tank heat insulation jacket in the alkaline electrolytic water hydrogen production device system provided by the utility model is not only easy to disassemble and assemble, but also can effectively isolate the contact and heat exchange cooling between the alkali tank and normal temperature air, and at the same time can provide heat to the alkali tank in the reverse direction, further reducing the cold start time of the alkaline electrolytic water hydrogen production device system.

[0058] (3) An alkaline electrolytic water hydrogen production device system provided by the utility model, on the one hand, exchanges heat for part of the lye through the external heat source and the lye temperature control feedback system to realize the rapid heating of the lye. On the other hand, through the multi-stage stepwise heating of the air source, the waste heat utilization of the external heat source, and the air temperature control feedback system, the heat insulation and heating of the external air of the alkaline electrolyzer are realized, achieving the effect of rapidly increasing the temperature of the lye in the alkaline electrolyzer; at the same time, in the transition stage, combined with the heating of the alkaline electrolyzer startup, the heating of the external heat source and the air source, the rapid heating of all the lye in the alkaline electrolytic water hydrogen production device system is realized; thus, rapid startup is achieved to adapt to photovoltaic, wind power and other renewable energy-coupled alkaline electrolytic water hydrogen production systems with randomness and volatility. Description of the Drawings

[0059] Figure 1 is a schematic diagram of the alkaline electrolytic water hydrogen production device system in the specific implementation manner of the utility model.

[0060] Figure 2 is a schematic diagram of the alkali tank heat insulation jacket.

[0061] Figure 3 is a schematic diagram of the frame unit.

[0062] Figure 4It is a schematic diagram of an adiabatic insulation unit.

[0063] Figure 5 It is a sectional view of the adiabatic insulation unit.

[0064] Figure 6 It is a schematic diagram of a single frame module.

[0065] In the figure: 101 - alkaline electrolyzer; - alkali tank heat insulation sleeve; 201 - hydrogen-alkali liquid separator; 202 - oxygen-alkali liquid separator; 301 - alkali liquid cooler; 401 - alkali liquid buffer tank; 501 - filter; 601 - alkali liquid circulation pump; 701 - alkali liquid-heat source heat exchanger; 801 - air-heat source heat exchanger; 901 - air heater; 1001 - first stop valve; 1002 - second stop valve; 1003 - third stop valve; 1004 - fourth stop valve; 1005 - fifth stop valve; 1006 - sixth stop valve; 1101 - alkali liquid temperature control feedback system; 1201 - air temperature control feedback system; 1301 - polyvinyl chloride housing; 1401 - polyurethane insulation cotton. Specific embodiments

[0066] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0067] The present utility model will be further described in detail below. However, the following examples are only simple examples of the present utility model and do not represent or limit the scope of the rights protection of the present utility model. The scope of protection of the present utility model shall be subject to the claims.

[0068] It should be understood that in the description of the present utility model, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0069] It should be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "arranged", "connected", and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0070] Those skilled in the art should understand that the present utility model necessarily includes necessary pipelines, conventional valves, and general pump equipment for realizing a complete process. However, the above contents do not belong to the main inventive points of the present utility model. Those skilled in the art can add and arrange them by themselves based on the process flow and equipment structure selection, and the present utility model does not make special requirements and specific limitations on this.

[0071] As a specific embodiment of the present utility model, a system for an alkaline electrolytic water hydrogen production device is provided, and its schematic diagram is as Figure 1 shown.

[0072] The system for the alkaline electrolytic water hydrogen production device includes an alkaline electrolytic cell 101, an alkali tank heat insulation jacket 102, a hydrogen-alkali liquid separator 201, an oxygen-alkali liquid separator 202, an alkali liquid cooler 301, and an alkali liquid-heat source heat exchanger 701;

[0073] The alkaline electrolytic cell 101 is respectively connected to the hydrogen-alkali liquid separator 201 and the oxygen-alkali liquid separator 202; both the hydrogen-alkali liquid separator 201 and the oxygen-alkali liquid separator 202 are connected to the alkali liquid cooler 301; the alkali liquid cooler 301, the alkali liquid-heat source heat exchanger 701, and the alkaline electrolytic cell 101 are connected in sequence;

[0074] The alkali tank heat insulation jacket 102 is arranged outside the alkaline electrolytic cell 101, and the schematic diagram of the alkali tank heat insulation jacket 102 is as Figure 2 shown.

[0075] The system for the alkaline electrolytic water hydrogen production device further includes an alkali liquid buffer tank 401, a filter 501, and an alkali liquid circulation pump 601;

[0076] The alkali liquid buffer tank 401 is connected to the alkali liquid cooler 301 through a first pipeline;

[0077] A first stop valve 1001 is arranged on the first pipeline;

[0078] The alkali liquid buffer tank 401 is connected to the filter 501 through a second pipeline;

[0079] A second stop valve 1002 is arranged on the second pipeline;

[0080] The alkali liquid cooler 301 is connected to the filter 501 through a third pipe;

[0081] The third pipeline is provided with a third stop valve 1003;

[0082] The filter 501, the alkali solution circulation pump 601 and the alkaline electrolytic cell 101 are connected in sequence;

[0083] A fourth stop valve 1004 is provided between the alkali solution circulation pump 601 and the alkaline electrolytic cell 101;

[0084] The alkali solution circulation pump 601 is connected to the alkali solution-heat source heat exchanger 701 through a fourth pipeline;

[0085] The fourth pipeline is provided with a fifth stop valve 1005;

[0086] A sixth stop valve 1006 is provided between the alkali solution-heat source heat exchanger 701 and the alkaline electrolytic cell 101 .

[0087] The alkali solution-heat source heat exchanger 701 is connected to an external heat source delivery pipeline.

[0088] The first stop valve 1001 , the second stop valve 1002 , the third stop valve 1003 , the fourth stop valve 1004 , the fifth stop valve 1005 and the sixth stop valve 1006 are all pneumatic stop valves.

[0089] The alkaline water electrolysis hydrogen production device system further includes an air-heat source heat exchanger 801 and an air heater 901;

[0090] The air-heat source heat exchanger 801 is connected to the alkali solution-heat source heat exchanger 701;

[0091] The air-heat source heat exchanger 801, the air heater 901 and the alkali tank thermal insulation cover 102 are connected in sequence.

[0092] The air-heat source heat exchanger 801 is connected to the air delivery pipeline.

[0093] The air heater 901 is a gas air heater.

[0094] The alkali tank thermal insulation cover 102 comprises a box-type frame structure, which is composed of 40 frame modules;

[0095] A single frame module is composed of a frame unit, a heat insulation unit and a fixing unit which are arranged in sequence.

[0096] The schematic diagram of the frame unit is as follows Figure 3 As shown; the schematic diagram of the thermal insulation unit is as shown Figure 4as shown; the sectional view of the adiabatic heat preservation unit is as Figure 5 shown; the schematic diagram of a single frame module is as Figure 6 shown.

[0097] The frame unit includes a frame structure spliced by stainless steel bars;

[0098] The adiabatic heat preservation unit is composed of a polyvinyl chloride shell 1301 and a polyurethane heat preservation cotton 1401 arranged inside the polyvinyl chloride shell 1301;

[0099] The fixing unit is a fixture.

[0100] The alkaline electrolyzed water hydrogen production device system further includes an alkali liquid temperature control feedback system 1101 and an air temperature control feedback system 1201;

[0101] The alkali liquid temperature control feedback system 1101 is arranged between the alkali liquid circulation pump 601 and the alkaline electrolytic cell 101;

[0102] The air temperature control feedback system 1201 is arranged between the air heater 901 and the alkali tank heat insulation jacket 102.

[0103] As a specific embodiment of the present invention, a running method of the above-mentioned alkaline electrolyzed water hydrogen production device system is further provided, including a rapid heating stage, a transition start-up stage and a normal operation stage. The specific working processes are as follows:

[0104] (1) Rapid heating stage: The first stop valve 1001, the second stop valve 1002, and the fourth stop valve 1004 are closed, the third stop valve 1003, the fifth stop valve 1005, and the sixth stop valve 1006 are opened, and the alkaline electrolytic cell 101 is not powered on;

[0105] About 50% of the designed circulation flow of the alkali liquid is pumped into the alkaline electrolytic cell 101 through the alkali liquid circulation pump 601, and then enters the hydrogen-alkali liquid separator 201 and the oxygen-alkali liquid separator 202 respectively. The alkali liquid passing through the hydrogen-alkali liquid separator 201 and the oxygen-alkali liquid separator 202 enters the filter 501 after passing through the alkali liquid cooler 301 without cooling water being input, and then enters the alkali liquid-heat source heat exchanger 701 through the action of the alkali liquid circulation pump 601, and exchanges heat with an external heat source: low-pressure steam with a temperature of 100 °C and a pressure of 0.2 MPa to increase the temperature. The rapid increase of the alkali liquid temperature to 85-90 °C is realized through the control of the alkali liquid temperature control feedback system 1101; the normal-temperature air with a pressure of 0.1 MPa from the air source exchanges heat with the air-heat source heat exchanger 801 to obtain a preliminary temperature rise, and then enters the air heater 901. The rapid increase of the air temperature in the alkali tank heat insulation jacket 102 is realized through the control of the air temperature control feedback system 1201, so as to prevent the alkali tank from exchanging heat with the external air and cooling down;

[0106] (2) Transitional startup stage: Open the first shut-off valve 1001 and the second shut-off valve 1002, close the third shut-off valve 1003, keep the fourth shut-off valve 1004 closed, keep the fifth shut-off valve 1005 and the sixth shut-off valve 1006 open, and the alkaline electrolyzer 101 starts to operate with power on;

[0107] Extract about 50% of the designed circulation flow rate of the alkaline solution through the alkaline solution circulation pump 601 and enter the alkaline electrolyzer 101, and then enter the hydrogen-alkaline solution separator 201 and the oxygen-alkaline solution separator 202 respectively. The alkaline solution passing through the hydrogen-alkaline solution separator 201 and the oxygen-alkaline solution separator 202 enters the alkaline solution buffer tank 401 after passing through the alkaline solution cooler 301 without cooling water input and is mixed with the remaining alkaline solution, and then enters the alkaline solution - heat source heat exchanger 701 after passing through the filter 501 and the alkaline solution circulation pump 601 respectively, exchanges heat with the external heat source and rises in temperature. Through the control of the alkaline solution temperature control feedback system 1101, the temperature of the alkaline solution is quickly raised to 75 - 80°C; The normal-temperature air with a pressure of 0.1 MPa from the air source exchanges heat with the air - heat source heat exchanger 801 to obtain a preliminary temperature rise, and then enters the air heater 901. Through the control of the air temperature control feedback system 1201, the temperature of the air in the alkaline tank heat insulation jacket 102 is quickly raised, thereby preventing the alkaline tank from exchanging heat with the external air and cooling down; Together, the remaining unheated alkaline solution in the alkaline solution buffer tank 401 is quickly raised to the set temperature of 65 - 70°C, so as to reach the normal operating conditions of the system;

[0108] (3) Normal operation stage: Keep the third shut-off valve 1003 closed, keep the first shut-off valve 1001 and the second shut-off valve 1002 open, open the fourth shut-off valve 1004, close the fifth shut-off valve 1005 and the sixth shut-off valve 1006, keep the alkaline electrolyzer 101 powered on, disconnect the air source and the external heat source, and turn on the cooling water of the alkaline solution cooler 301;

[0109] Extract about 100% of the designed circulation flow rate of the alkaline solution through the alkaline solution circulation pump and enter the alkaline electrolyzer 101, and then enter the hydrogen-alkaline solution separator 201 and the oxygen-alkaline solution separator 202 respectively. Then, the alkaline solution passing through the hydrogen-alkaline solution separator 201 and the oxygen-alkaline solution separator 202 enters the alkaline solution buffer tank 401 after the temperature of the circulating alkaline solution is controlled at 65 - 70°C by the alkaline solution cooler 301 with the cooling water system input, and then enters the alkaline electrolyzer 101 for circulation after passing through the filter 501 and the alkaline solution circulation pump 601 respectively.

[0110] In summary, the alkaline electrolyzed water hydrogen production device system provided by the present utility model has a simple structure and reasonable design. By integrating and applying an external heat source heating system, an external air multi-stage heating system, an alkali tank heat insulation jacket, etc. on the basis of the traditional process system, the cold start time of the alkaline electrolyzed water hydrogen production device system is significantly reduced, and the electrolyzed water hydrogen production efficiency is improved. It is suitable for wide promotion and application in the photovoltaic and wind power renewable energy coupled alkaline electrolyzed water hydrogen production system with randomness and volatility.

[0111] The applicant declares that the present utility model uses the above embodiments to illustrate the detailed structural features of the present utility model, but the present utility model is not limited to the above detailed structural features, that is, it does not mean that the present utility model must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvement to the present utility model, the equivalent replacement of the components selected for the present utility model, the addition of auxiliary components, the selection of specific methods, etc. all fall within the protection scope and the disclosure scope of the present utility model.

[0112] The preferred embodiments of the present utility model have been described in detail above. However, the present utility model is not limited to the specific details in the above embodiments. Within the technical concept scope of the present utility model, various simple modifications can be made to the technical solution of the present utility model, and these simple modifications all belong to the protection scope of the present utility model.

Claims

1. An alkaline electrolyzed water hydrogen production device system, characterized in that, The alkaline electrolyzed water hydrogen production device system includes an alkaline electrolyzer (101), an alkali tank heat insulation jacket (102), a hydrogen-alkali liquid separator (201), an oxygen-alkali liquid separator (202), an alkali liquid cooler (301), and an alkali liquid-heat source heat exchanger (701); The alkaline electrolyzer (101) is respectively connected to the hydrogen-alkali liquid separator (201) and the oxygen-alkali liquid separator (202); both the hydrogen-alkali liquid separator (201) and the oxygen-alkali liquid separator (202) are connected to the alkali liquid cooler (301); the alkali liquid cooler (301), the alkali liquid-heat source heat exchanger (701), and the alkaline electrolyzer (101) are connected in sequence; The alkali tank heat insulation jacket (102) is arranged outside the alkaline electrolyzer (101).

2. The alkaline electrolyzed water hydrogen production device system according to claim 1, wherein The alkaline electrolyzed water hydrogen production device system further includes an alkali liquid buffer tank (401), a filter (501), and an alkali liquid circulation pump (601); The alkali liquid buffer tank (401) is connected to the alkali liquid cooler (301) through a first pipeline; A first stop valve (1001) is arranged on the first pipeline; The alkali liquid buffer tank (401) is connected to the filter (501) through a second pipeline; A second stop valve (1002) is arranged on the second pipeline; The alkali liquid cooler (301) is connected to the filter (501) through a third pipeline; A third stop valve (1003) is arranged on the third pipeline; The filter (501), the alkali liquid circulation pump (601), and the alkaline electrolyzer (101) are connected in sequence; A fourth stop valve (1004) is arranged between the alkali liquid circulation pump (601) and the alkaline electrolyzer (101); The alkali liquid circulation pump (601) is connected to the alkali liquid-heat source heat exchanger (701) through a fourth pipeline; A fifth stop valve (1005) is arranged on the fourth pipeline; A sixth stop valve (1006) is arranged between the alkali liquid-heat source heat exchanger (701) and the alkaline electrolyzer (101); The alkali liquid-heat source heat exchanger (701) is connected to an external heat source delivery pipeline.

3. The alkaline electrolyzed water hydrogen production device system according to claim 2, characterized in that, The first stop valve (1001), the second stop valve (1002), the third stop valve (1003), the fourth stop valve (1004), the fifth stop valve (1005), and the sixth stop valve (1006) each independently include a pneumatic stop valve or an electric stop valve.

4. The alkaline electrolyzed water hydrogen production device system according to claim 1, characterized in that, The alkaline electrolyzed water hydrogen production device system further includes an air-heat source heat exchanger (801) and an air heater (901); The air-heat source heat exchanger (801) is connected to the alkali liquid-heat source heat exchanger (701); The air-heat source heat exchanger (801), the air heater (901), and the alkali tank heat insulation jacket (102) are connected in sequence.

5. The alkaline electrolyzed water hydrogen production device system according to claim 4, characterized in that, The air-heat source heat exchanger (801) is connected to an air delivery pipeline.

6. The alkaline electrolyzed water hydrogen production device system according to claim 4, characterized in that, The air heater (901) includes any one of an electric air heater, a gas air heater, or a heat pump air heater.

7. The alkaline electrolyzed water hydrogen production device system according to claim 1, characterized in that, The alkali tank heat insulation jacket (102) includes a box-type frame structure and is composed of a plurality of frame modules; A single frame module is composed of a frame unit, a heat insulation unit, and a fixing unit arranged in sequence.

8. The alkaline electrolyzed water hydrogen production device system according to claim 7, characterized in that, The frame unit includes a frame structure spliced by lightweight metal strips; The lightweight metal strips include stainless steel strips or aluminum alloy strips.

9. The alkaline electrolyzed water hydrogen production device system according to claim 7, characterized in that, The heat insulation unit is composed of a polyvinyl chloride housing (1301) and polyurethane insulation cotton (1401) arranged inside the polyvinyl chloride housing (1301); The fixing unit includes a fixture.

10. The alkaline electrolyzed water hydrogen production device system according to claim 1, wherein, The alkaline electrolyzed water hydrogen production device system further includes an alkali solution temperature control feedback system (1101) and an air temperature control feedback system (1201); The alkali solution temperature control feedback system (1101) is arranged between the alkali solution circulation pump (601) and the alkaline electrolytic cell (101); The air temperature control feedback system (1201) is arranged between the air heater (901) and the alkali tank heat insulation jacket (102).

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