CN210795756U - A high-power sodium borohydride hydrolysis hydrogen production device - Google Patents

Abstract

The utility model discloses a high-power sodium borohydride hydrolysis hydrogen plant, it includes sodium borohydride solution storage tank, sodium borohydride solution feed system, sodium borohydride hydrolysis hydrogen production ware, hydrogen separator, hydrogen purger, waste liquid jar and control system. The utility model discloses a high-power sodium borohydride hydrogen plant that hydrolysises collects separation, the purification of hydrogen manufacturing and hydrogen and is multi-functional in an organic whole, but full automatic operation, reliable degree is high, safe in utilization, and the hydrogen output is big, and hydrogen purity is high, all can satisfy the hydrogen demand of using of 30kW hydrogen fuel battery system in the aspect of hydrogen production quality and hydrogen production speed etc. can obviously improve the mass energy density of whole system as the hydrogen supply system. Moreover, the high-power sodium borohydride hydrolysis hydrogen production device of the utility model is suitable for a fixed fuel cell system with an available water source nearby, and has a better application prospect.

Description

A high-power sodium borohydride hydrolysis hydrogen production device

technical field

The utility model relates to the technical field of hydrogen production by hydrolysis of sodium borohydride, in particular to a high-power sodium borohydride hydrolysis hydrogen production device for providing a fixed hydrogen source with high energy density for a 30kW hydrogen-air fuel cell.

Background technique

A fuel cell is a power generation device that directly converts chemical energy into electrical energy without combustion process. The conversion process is not limited by the Carnot cycle, and has the advantages of high energy conversion efficiency and environmental friendliness. The ideal fuel for fuel cells is hydrogen. .

At present, the hydrogen supply of fuel cells can adopt two ways: direct hydrogen storage or indirect hydrogen supply. Direct hydrogen storage methods include gaseous high-pressure storage, alloy solid-state storage, and cryogenic liquid storage, but all have problems such as low mass energy density, bulky energy storage systems, and unsafe hydrogen storage and transportation. At present, most of the indirect hydrogen supply research is the reforming of alcohols, but the CO content in the reformed hydrogen-rich hydrogen reaches 5%. It is necessary to develop a long-life cycle and high-temperature resistant membrane purifier. However, the current purification membrane technology is not mature, and the cost is expensive. It has a short life and is not suitable for fuel cells with large hydrogen production. Therefore, the development of hydrogen storage and supply technologies that match fuel cells is one of the core issues.

Sodium borohydride is a white crystalline powder with a mass hydrogen storage density of 10.8%. It can react with water at room temperature to generate hydrogen. The reaction formula is: NaBH ₄ +2H ₂ O→4H ₂ +NaBO _2. The reaction has no requirement on the nature of water, and even seawater can react directly. When used as a hydrogen source for a stationary hydrogen-air fuel cell, the existing water source nearby can be used. Therefore, the theoretical hydrogen mass hydrogen storage density of sodium borohydride can be as high as 21.6%.

Chinese utility model patent 201320130306.X discloses a sodium borohydride hydrogen production device, but the device uses a DC power source to catalyze the decomposition of sodium borohydride, and the hydrogen prepared by this hydrogen production method is reused for hydrogen-air fuel cell power generation, which will greatly reduce energy It can not be used as an independent power source to ensure the electricity demand of the power system in the absence of electricity.

Chinese invention patent 200810198544.8 uses a low-power hydraulic pump to automatically adjust the flow rate of sodium borohydride solution added to the reactor to control the reaction speed and the amount of hydrogen generated. Chinese invention patent 200910248746.6 also uses this method to control the reaction rate. However, the above patents disclosed are all small-scale hydrogen production devices, and the power of the matching fuel cell system is about 500W, which can only be used as a hydrogen source for portable mobile power sources, and cannot meet the hydrogen energy demand of high-power stationary hydrogen-air fuel cells. The existing hydrolysis hydrogen production device of sodium borohydride with large hydrogen production has the technical characteristics of uneven reaction, difficult control of the temperature in the reaction area, and difficulty in purification.

Utility model content

In order to solve the above-mentioned shortcomings and deficiencies in the prior art, the utility model provides a high-power sodium borohydride hydrolysis hydrogen production device with fully automatic operation, high reliability, safe use and high hydrogen purity, to match the 30kW fixed type. Hydrogen demand for hydrogen-air fuel cell systems.

A high-power sodium borohydride hydrolysis hydrogen production device, which comprises a sodium borohydride solution storage tank, a sodium borohydride solution feeding system, a sodium borohydride hydrolysis hydrogen production reactor, a hydrogen separator, a hydrogen cleaner, a waste liquid tank and Control System. The sodium borohydride solution storage tank supplies sodium borohydride solution to the sodium borohydride hydrolysis hydrogen production reactor through the sodium borohydride solution feeding system, and the hydrogen separator reacts the sodium borohydride hydrolysis to hydrogen production The hydrogen-containing liquid discharged from the separator is subjected to gas-liquid separation, the hydrogen cleaner purifies and cleans the hydrogen discharged from the hydrogen separator, and the waste liquid tank is used for the liquid discharged from the hydrogen separator and the hydrogen cleaner. collect. The control system is respectively connected with the sodium borohydride solution feeding system, the sodium borohydride hydrolysis hydrogen production reactor, the hydrogen separator and the hydrogen cleaning device to control the operation thereof.

As a preferred embodiment of the present invention, the sodium borohydride solution storage tank is provided with a sodium borohydride powder feeding port, a raw material water inlet, a sodium borohydride solution outlet, a DC stirring motor and a stirring shaft. The sodium borohydride powder feeding port is used for adding sodium borohydride powder into the sodium borohydride solution storage tank, and the raw material water inlet is used for adding raw material water into the sodium borohydride solution storage tank, and then by The direct current stirring motor drives the stirring shaft to stir to accelerate the dissolution of the sodium borohydride powder into the raw material water to form a sodium borohydride solution.

As a preferred embodiment of the present invention, the sodium borohydride solution feeding system includes a first-stage diaphragm pump, a second-stage gear pump and a third-stage gear pump that are connected in sequence along the liquid flow direction. The inlet of the first-stage diaphragm pump is connected to the The sodium borohydride solution storage tank is connected, and the outlet of the three-stage gear pump is connected with the sodium borohydride hydrolysis hydrogen production reactor. During operation, the sodium borohydride solution is pumped into the hydrogen production reactor by the hydrolysis of sodium borohydride through the first-stage diaphragm pump, the second-stage gear pump and the third-stage gear pump.

As a preferred embodiment of the present invention, the pipeline connecting the first-stage diaphragm pump with the sodium borohydride solution storage tank is provided with one of the filters and one of the solenoid valves, and the outlet of the first-stage diaphragm pump is provided with One of the pressure sensors, the outlet of the secondary gear pump is provided with the second pressure sensor, and the outlet of the tertiary gear pump is provided with the third pressure sensor and one of the check valves; the sodium borohydride solution feeding system It also includes an overpressure relief assembly whose one end is connected to the inlet of the first-stage diaphragm pump, and the other end is connected to the outlet of the third-stage gear pump. The overpressure relief assembly includes two connected check valves and pressure relief valve. In the utility model, the overpressure relief component is used as the overpressure work relief port of the first-stage diaphragm pump, the second-stage gear pump and the third-stage gear pump.

As a preferred embodiment of the present utility model, the sodium borohydride hydrolysis hydrogen production reactor adopts a suction cooling method. Specifically, the sodium borohydride hydrolysis hydrogen production reactor includes an air-cooled reactor body, and the air-cooled reactor body includes a tube box, and the tube box is provided with finned tubes, and the finned tubes are filled with sodium borohydride A hydrolysis catalyst, a cooling fan is also installed on the surface of the tube box. After entering the sodium borohydride hydrolysis hydrogen production reactor, the sodium borohydride solution passes through the tube of the finned tube and contacts with the sodium borohydride hydrolysis catalyst in the tube. Air traverses the finned tubes outside the tubes, cooling or condensing the fluid within the tubes. The cooling fan drives the air to flow to improve the air cooling effect.

Further, both ends of the tube box are respectively provided with an upper cover plate and a lower cover plate, the lower cover plate is provided with a liquid inlet communicating with one end of the finned tube, and the upper cover plate is provided with a liquid inlet communicating with one end of the finned tube. There is a drain port communicating with the other end of the finned tube. In order to facilitate maintenance and disassembly, the upper cover plate and the lower cover plate and the pipe box are connected by bolts.

Further, the sodium borohydride hydrolysis hydrogen production reactor also includes a spool, one end of the spool is a liquid inlet, which is connected with the liquid outlet of the air-cooled reactor body, and the other end of the spool is connected to an automatic overpressure release. The other end of the four-way is connected to a manual overpressure relief valve, and the last end of the four-way is a liquid discharge port, which is connected to the hydrogen separator. The liquid inlet of the air-cooled reactor body is provided with the second solenoid valve, and the second solenoid valve is connected with the sodium borohydride solution feeding system.

Preferably, the finned tubes are arranged in an equilateral triangle in the tube box. In this way, the air can be uniformly distributed and traversed through each of the finned tubes, so that the sodium borohydride hydrolysis hydrogen production reactor can dissipate heat evenly.

Preferably, both ends of the finned tube are provided with screens to prevent the sodium borohydride hydrolysis catalyst from leaving the tube, and the upper cover is provided with one of temperature sensors and four of pressure sensors.

In the utility model, the fins of the finned tube are integrally pressed and have good consistency. The upper and lower end faces of the pipe box are processed by the machine as a whole to ensure a good surface roughness Ra0.3, and the two ends are machined with gasket grooves, which can prevent the gasket from moving and ensure the sealing performance.

The sodium borohydride hydrolysis catalyst is a metal or bimetal, such as Pt, Rh, Ru, Co, etc., and is prepared by attaching to a porous medium carrier by a chemical deposition method. The carrier can be resin, activated carbon, or porous metal foam (such as foam nickel).

As a preferred embodiment of the present invention, the hydrogen separator adopts a cyclone liquid feeding method. Specifically, the hydrogen separator includes a separator body, the separator body includes a sealed cylindrical body, the upper side of the cylindrical body is provided with a reaction liquid inlet, and the top of the cylindrical body is provided with a hydrogen outlet, so The bottom end of the cylinder body is provided with a waste liquid outlet, and the inner and upper part of the cylinder body is provided with a spiral separation component 1, a spiral separation component 2 and an isolation plate, and the isolation plate is installed above the reaction liquid inlet. The first spiral separation assembly is fixedly connected with the isolation plate, and the second spiral separation assembly is installed inside the first spiral separation assembly.

Preferably, the helical separation assembly 1 comprises an open pipe 1 and one of a helical baffle plate, the upper end of the pipe 1 is connected with the isolation plate and the port is communicated with the hydrogen outlet, and the spiral baffle plate The inner side of one is connected with the outer wall of the first pipe, the outer side of one of the spiral baffles is in conflict with the inner wall of the cylinder, and the upper end of one of the spiral baffles is also in contact with the Reaction liquid inlet connection.

Preferably, the second helical separation assembly includes a second sealed pipe and the second helical baffle, the second pipe is installed in the first pipe through a fixing plate, and the inner side of the second helical baffle is connected to the second one. The outer wall surface of the second tube is connected, and the outer surface of the second spiral deflector is in conflict with the inner wall surface of the first tube.

Further, the reaction liquid inlet is provided with the third solenoid valve, the third solenoid valve is connected with the liquid discharge port of the four-way, the waste liquid outlet is connected with the waste liquid tank, and the hydrogen outlet is connected with the waste liquid tank. The hydrogen cleaner is connected, the cylinder body is provided with one liquid level sensor, the second temperature sensor and the fifth pressure sensor, and the second filter is also provided between the waste liquid outlet and the waste liquid tank , Waste liquid discharge pressure reducing valve and solenoid valve four.

The hydrogen separator of the utility model is a device which has the function of separating the reaction liquid containing fine hydrogen bubbles. After the reaction liquid mixed with hydrogen bubbles enters from the inlet of the reaction liquid, it flows downward in a cyclone under the action of one of the spiral guide plates of the first spiral separation component. During this process, the hydrogen in the reaction liquid flows down. The bubbles will be fully mixed with the reaction solution, and the small bubbles will continue to aggregate and annihilate, thereby generating large bubbles. The air bubbles are separated from the reaction liquid at the bottom of the cylinder, and the air bubbles move upwards and collect into hydrogen gas. The reaction liquid remains at the bottom of the cylinder to form waste liquid, which is finally discharged through the waste liquid outlet. The process of the bubbles escaping from the reaction liquid will carry part of the alkali mist, and the hydrogen needs to pass through the second spiral guide plate of the second spiral separation component during the upward movement. The high-speed hydrogen flow can realize hydrogen and alkali under the action of centrifugal force. Fog separation. Finally, the separated hydrogen is discharged from the hydrogen outlet, and the alkali mist merges into the bottom of the cylinder to form waste liquid.

When one of the liquid level sensors detects that the height of the waste liquid reaches a preset value, the fourth solenoid valve is opened, and the waste liquid passes through the second filter, the waste liquid discharge pressure reducing valve and the solenoid valve in turn. The fourth valve flows to the waste tank.

As a preferred embodiment of the present invention, the hydrogen cleaner includes a cleaner body, and the cleaner body includes a sealed washing pipe, a third spiral separation assembly, a diffusion box, a hydrogen inlet pipe, a hydrogen outlet pipe, and a clean water inlet pipe and a waste liquid outlet pipe, the spiral separation assembly 3 is located in the inner upper part of the washing pipe, the diffusion box is located in the inner and lower part of the washing pipe, and one end of the hydrogen inlet pipe is from the top of the washing pipe Inserted into and connected to the diffusion box, the hydrogen outlet pipe is arranged on the upper side of the washing pipe, the clean water inlet pipe is arranged on the lower side of the washing pipe, and the waste liquid outlet pipe is arranged on the Wash the side bottom of the tube.

Preferably, the helical separation assembly 3 includes a sealed pipe 3 and a third helical baffle, the pipe 3 is sleeved on the hydrogen inlet pipe, and the inner side of the third helical baffle is connected to the third helical baffle. The outer wall surface of the third pipe is connected, and the outer surface of the third spiral deflector is in conflict with the inner wall surface of the washing pipe.

Further, the diffusion box includes an inner steel paper layer and an outer steel paper layer, the inner steel paper layer is woven from 30-mesh steel paper, and the outer steel-paper layer is woven from 100-mesh steel paper. The diffusion box is connected with the hydrogen inlet pipe through a connecting plate.

Further, a fifth solenoid valve is provided on the pipeline connecting the hydrogen inlet pipe and the hydrogen separator, and the water purification inlet pipe is also connected with a cleaning liquid inlet system, and the cleaning liquid inlet system includes along the liquid The third one of the filter, the cleaning liquid inlet pump, the third one-way valve and the sixth one of the solenoid valve are arranged in sequence in the flow direction, and the hydrogen outlet pipe is also connected to the hydrogen outlet pressure reducing valve and the seventh solenoid valve arranged in sequence along the pipeline, The pipeline connecting the waste liquid outlet pipe and the waste liquid tank is also provided with a filter No. 4, a cleaning liquid discharge pressure reducing valve and a solenoid valve No. 8, and the washing pipe is also provided with a pressure sensor No. 6. The second position sensor, the third temperature sensor and the conductivity sensor.

The hydrogen cleaner of the utility model is a device with a special separation function for hydrogen and alkaline droplets; in order to improve the quality of the hydrogen, the hydrogen cleaner performs on-line and timely purification of the hydrogen separated by the hydrogen separator, and efficiently removes the entrained hydrogen in the hydrogen flow. NaOH, NaBO ₂ and NaBO ₃ and other impurities can ensure the quality of hydrogen and prevent impurities from entering the fuel cell with the hydrogen flow, which will cause adverse effects on the battery. The hydrogen cleaner of the utility model removes the lye through water cleaning, the hydrogen mixed with the lye enters the diffusion box through the hydrogen inlet pipe, and the diffusion box is arranged in the cleaning water in the washing pipe. After the gas passes through the diffusion box, the speed is reduced, and the lye is diffused and fully contacted with the cleaning water to ensure the cleaning effect.

When the device is started, the sixth solenoid valve is opened, the cleaning liquid inlet pump is started, and the cleaning water is pumped into the washing pipe through the third one-way valve. When the second liquid level sensor detects that the liquid level of the cleaning water in the washing pipe exceeds 450mm, the sixth solenoid valve is closed. The conductivity sensor can monitor the conductivity of the cleaning water in the washing pipe in real time. When the conductivity of the cleaning water reaches the set value (500μS/cm), open the eighth solenoid valve, the sixth solenoid valve and the cleaning liquid inlet pump, the liquid level The second sensor monitors the liquid level of the cleaning fluid in real time. Since the discharge volume is much larger than the liquid intake, when the liquid level is lower than 100mm, the eighth solenoid valve is closed. When the liquid level is higher than 450mm, close the sixth solenoid valve and the cleaning liquid inlet pump.

When the hydrogen gas escapes from the cleaning liquid, it will carry a small amount of cleaning droplets. Therefore, in the present invention, a third spiral separation component is designed on the inner and upper part of the cleaning pipe. The hydrogen gas needs to pass through the third spiral deflector of the third spiral separation component during the upward movement, and the high-speed hydrogen flow can realize the separation of hydrogen gas and liquid droplets under the action of centrifugal force. Finally, the separated hydrogen is discharged from the hydrogen outlet pipe, and flows into the hydrogen buffer tank or the use device through the pipeline, and the separated cleaning liquid is merged into the cleaning liquid at the bottom of the washing pipe.

As a preferred embodiment of the present invention, the control system includes a digital-to-analog converter, a Siemens microprocessor, a touch screen, a mouse, an intermediate relay and a relay. In the present invention, the digital-to-analog converter is respectively connected with the pressure sensor group, the temperature sensor group, the liquid level sensor group and the conductivity sensor, and the Siemens microprocessor is respectively connected with the digital-to-analog converter, the The touch screen, the mouse and the intermediate relay are connected, and the intermediate relay is respectively connected with the relay and the solenoid valve group; the relay is respectively connected with the air-cooled reactor body and the pump group. The pressure sensor group includes one of the pressure sensors, the second of the pressure sensors, the third of the pressure sensors, the fourth of the pressure sensors, the fifth of the pressure sensors, and the sixth of the pressure sensors. The temperature sensor group includes one of the temperature sensors, the second of the temperature sensors, and the third of the temperature sensors. The liquid level sensor group includes one of the liquid level sensors and two of the liquid level sensors. The solenoid valve group includes one of the solenoid valves, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, and the The seventh solenoid valve and the eighth solenoid valve. The pump set includes the first-stage diaphragm pump, the second-stage gear pump, the third-stage gear pump, and the cleaning liquid feed pump.

In the present invention, the digital-to-analog converter performs analog/digital and digital/analog conversion to realize the communication between the Siemens microprocessor and the connected components. The fourth pressure sensor collects the reaction pressure in the air-cooled reactor body, and transmits the signal to the Siemens microprocessor, so as to compare with the set pressure value, and adjust the speed of the secondary gear pump and the third gear pump, thereby controlling The hydrogen production rate of the system. One of the temperature sensors can detect the temperature of the reaction bed of the air-cooled reactor body, the second temperature sensor can detect the internal temperature of the separator body, and the third temperature sensor can detect the internal temperature of the cleaner body. All of the above sensor signals can be transmitted to the Siemens microprocessor and display real-time information on the touch screen.

When in use, the system is powered on and initialized, the hydrogen production rate is set through the touch screen or mouse, and the pressure and temperature parameters of the air-cooled reactor corresponding to different hydrogen production rates are preset in the Siemens microprocessor. The concentration of sodium solution and the expected conversion rate are calculated and controlled for the influent amount of sodium borohydride solution. When the pressure of the air-cooled reactor body is not within the set range, adjust the rotational speed of the secondary gear pump and the tertiary gear pump. When the bed temperature of the air-cooled reactor body is not within the set range, the rotational speed of its cooling fan is adjusted.

In order to meet the hydrogen demand of high-power fuel cells and improve the energy density of the entire system, the utility model adopts an air-cooled reactor structure, and integrates the air cooler and the reactor into one. In order to ensure the heat dissipation effect, the tube with fin structure is used, and the fins are pressed as a whole, with good consistency and uniform heat dissipation. The hydrogen produced by the hydrolysis reaction of the reactor is all tiny hydrogen bubbles, which are mixed in the reaction waste liquid, so it is necessary to separate the hydrogen and the reaction waste liquid, and the hydrogen separator of the present utility model can perform online separation of the hydrogen and the reaction waste liquid, The separation effect is good. In addition, alkaline droplets such as NaBO ₂ and NaOH are entrained in the hydrogen stream, which is a gas-liquid two-phase mixture, which is harmful to the fuel cell. Therefore, the utility model implements on-line purification of hydrogen through a hydrogen cleaner to remove harmful impurities. , improve the quality of hydrogen.

The high-power sodium borohydride hydrolysis hydrogen production device of the utility model integrates the functions of hydrogen production, separation and purification of hydrogen, can be fully automated, has high reliability, is safe to use, produces large amount of hydrogen, and has high hydrogen purity. The hydrogen quality and hydrogen production rate can meet the hydrogen demand of the 30kW hydrogen-air fuel cell system. As a hydrogen supply system, the mass energy density of the overall system can be significantly improved. Moreover, the high-power sodium borohydride hydrolysis hydrogen production device of the present invention is suitable for a stationary fuel cell system with an available water source nearby, and has a good application prospect.

Description of drawings

Fig. 1 is the process flow diagram of the high-power sodium borohydride hydrolysis hydrogen production device described in the utility model;

Fig. 2 is the sectional structure schematic diagram of the air-cooled reactor body according to the utility model;

Fig. 3 is the side structure schematic diagram of the air-cooled reactor body according to the utility model;

Fig. 4 is the sectional view of A-A surface in Fig. 2;

Fig. 5 is the sectional view of B-B surface in Fig. 2;

6 is a schematic cross-sectional structure diagram of the separator body according to the utility model;

Fig. 7 is a partial enlarged view of A in Fig. 6;

Fig. 8 is a partial enlarged view of B in Fig. 6;

FIG. 9 is a schematic cross-sectional structure diagram of the washer body according to the utility model;

10 is a bottom view of the washer body according to the utility model;

11 is a schematic cross-sectional view of the washer body according to the present invention in another direction;

Figure 12 is a partial enlarged view of C in Figure 11;

Figure 13 is a schematic diagram of the structural connection of the control system according to the present invention;

Figure 14 is a schematic diagram of the temperature and pressure PID regulation of the present invention.

In the figure, sodium borohydride solution storage tank 1; sodium borohydride solution feeding system 2, one of filters 201, one of solenoid valves 202, one-stage diaphragm pump 203, one of pressure sensors 204, two-stage gear pump 205, The second pressure sensor 206, the three-stage gear pump 207, the third pressure sensor 208, the one-way valve 209, the second one-way valve 210, the pressure relief valve 211; the sodium borohydride hydrolysis hydrogen production reactor 3, the solenoid valve Two 301, air-cooled reactor body 302, one of temperature sensors 303, four of pressure sensors 304, four-way 305, automatic overpressure relief valve 306, manual overpressure relief valve 307, tube box 308, finned tube 309, Cooling fan 310, upper cover 311, lower cover 312, liquid inlet 313, liquid outlet 314; hydrogen separator 4, solenoid valve 3 401, separator body 402, liquid level sensor 403, temperature sensor Two 404, pressure sensor five 405, filter two 406, waste liquid discharge pressure relief valve 407, solenoid valve four 408, cylinder 409, reaction liquid inlet 410, hydrogen outlet 411, waste liquid outlet 412, spiral separation component One 413, spiral separation assembly two 414, isolation plate 415, pipe one 416, one spiral deflector 417, pipe two 418, spiral deflector two 419, fixing plate 420, blocking plate 421, sealing plate 422, sealing Base 423; Hydrogen Cleaner 5, Solenoid Valve No. 5 501, Cleaner Body 502, Pressure Sensor No. 6 503, Liquid Level Sensor No. 2 504, Temperature Sensor No. 3 505, Conductivity Sensor 506, Cleaning Liquid Inlet System 507, Hydrogen outlet pressure reducing valve 508, solenoid valve 7 509, filter 4 510, cleaning fluid discharge pressure reducing valve 511, solenoid valve 8 512, filter 3 513, cleaning fluid inlet pump 514, one-way valve Three 515, solenoid valve six 516, washing pipe 517, spiral separation assembly three 518, diffusion box 519, hydrogen inlet pipe 520, hydrogen outlet pipe 521, water inlet pipe 522, waste liquid outlet pipe 523, pipe three 524, spiral baffle 3 525, sealing plate 526, sealing base 527, inner steel paper layer 528, outer steel paper layer 529, connecting plate 530; waste liquid tank 6; control system 7, digital-to-analog converter 701, Siemens microprocessor 702 , touch screen 703 , mouse 704 , intermediate relay 705 , relay 706 , pressure sensor group 707 , temperature sensor group 708 , liquid level sensor group 709 , solenoid valve group 710 , and pump group 711 .

Detailed ways

In order to better illustrate the purpose, technical solutions and advantages of the present utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments of the present invention are only used to illustrate the technical effects of the present invention, rather than to limit the protection scope of the present invention.

As shown in Figure 1, the high-power sodium borohydride hydrolysis hydrogen production device of the present invention comprises a sodium borohydride solution storage tank 1, a sodium borohydride solution feeding system 2, a sodium borohydride hydrolysis hydrogen production reactor 3, and a hydrogen separator 4. Hydrogen cleaner 5 , waste liquid tank 6 and control system 7 .

Specifically, the sodium borohydride solution storage tank 1 is provided with a sodium borohydride powder feeding port, a raw material water inlet, a sodium borohydride solution outlet, a DC stirring motor and a stirring shaft. Among them, the sodium borohydride powder feeding port is used to add sodium borohydride powder to the sodium borohydride solution storage tank, the raw material water inlet is used to add raw material water to the sodium borohydride solution storage tank, and then the stirring shaft is driven by a DC stirring motor Stir to accelerate the dissolution of the sodium borohydride powder into the raw water to form a sodium borohydride solution.

Specifically, the sodium borohydride solution feeding system 2 includes one of the filters 201 , one of the solenoid valves 202 , one of the first-stage diaphragm pumps 203 , one of the pressure sensors 204 , the second-stage gear pump 205 , the second of the pressure sensors 206 , which are connected in sequence. , a three-stage gear pump 207 , the third pressure sensor 208 and one of the one-way valves 209 ; it also includes an overpressure relief component, which includes the second one-way valve 210 and a pressure relief valve 211 connected. There are two connections at the outlet of the three-stage gear pump; one is used for overpressure relief, as the overpressure working pressure relief port of the gear pump, which is connected to the overpressure relief component, and then connected to the inlet of the first-stage diaphragm pump; One way is used as a reaction liquid pipeline, which is connected to the third pressure sensor and one of the one-way valves. The components of the sodium borohydride solution feeding system are connected by 316L stainless steel pipes and ferrule type pipe joints. One of the one-way valves is connected to the hydrogen production reactor by the hydrolysis of sodium borohydride through a 316L stainless steel pipe.

Specifically, the sodium borohydride hydrolysis hydrogen production reactor 3 includes the second solenoid valve 301, the air-cooled reactor body 302, the one temperature sensor 303, the fourth pressure sensor 304, the four-way 305, the automatic overpressure relief valve 306 and the manual Overpressure relief valve 307. The liquid inlet of the air-cooled reactor body is connected with the second solenoid valve, and the second solenoid valve is also connected with one of the check valves. One end of the four-way is the liquid inlet, which is connected to the liquid discharge port of the air-cooled reactor body, one end is connected to the automatic overpressure relief valve, the other end is connected to the manual overpressure relief valve, and the last end is the liquid discharge port, which is connected to the hydrogen separator. . One of the temperature sensors and the fourth of the pressure sensors are arranged on the body of the air-cooled reactor and are responsible for collecting the temperature and reaction pressure of the reaction bed in the body of the air-cooled reactor.

As shown in Figures 2 to 5, in this embodiment, the air-cooled reactor body 302 includes a tube box 308, and the tube box is equipped with finned tubes 309. The size of the finned tubes is Ф16×1.5mm, and the number of tubes is 105, which is in the form of 105 tubes. Equilateral triangle arrangement. The interior of the finned tube is filled with a square sodium borohydride hydrolysis catalyst, and the sodium borohydride hydrolysis catalyst is prepared by a chemical deposition method by using foamed nickel to support active ruthenium. The two nozzles of the finned tube are covered with a screen to fix the catalyst and prevent the catalyst from falling off the tube. A cooling fan 310 is installed on the surface of the tube box, an upper cover plate 311 and a lower cover plate 312 are respectively arranged on both ends of the tube box, and a liquid inlet 313 connected to one end of the finned tube is arranged on the lower cover plate. There is a drain port 314 communicating with the other end of the finned tube. In order to facilitate the maintenance and disassembly, the upper cover and the lower cover are connected with the pipe box by bolts. After the sodium borohydride solution enters from the liquid inlet, it passes through the tube of the finned tube and is in uniform contact with the sodium borohydride hydrolysis catalyst in the tube. The air traverses the finned tube, cooling or condensing the fluid in the tube. Cooling fans drive air flow for improved air cooling. The fins of the finned tube are integrally pressed and have good consistency. The upper and lower end faces of the pipe box are processed by the machine as a whole to ensure a good surface roughness Ra0.3, and the two ends are machined with gasket grooves, which can prevent the gasket from moving and ensure the sealing performance.

Specifically, the hydrogen separator 4 includes the third solenoid valve 401, the separator body 402, the first liquid level sensor 403, the second temperature sensor 404, the fifth pressure sensor 405, the second filter 406, and the waste liquid discharge pressure reducing valve. 407 and the fourth 408 of the solenoid valve. The third solenoid valve is respectively connected to the liquid discharge port of the four-way and the reaction liquid inlet of the separator body. the liquid level, and the temperature and pressure inside the separator body are collected. The waste liquid outlet of the separator body is sequentially connected to the second filter, the waste liquid discharge pressure reducing valve, the fourth solenoid valve and the waste liquid tank; the hydrogen outlet of the separator body is connected to the hydrogen cleaner.

As shown in Figures 6-8, in this embodiment, the separator body 402 includes a sealed cylinder 409, the upper side of the cylinder is provided with a reaction liquid inlet 410, the top of the cylinder is provided with a hydrogen outlet 411, The bottom end is provided with a waste liquid outlet 412 . The inner upper part of the cylinder is provided with a spiral separation assembly 413, a spiral separation assembly 2 414 and an isolation plate 415, wherein the isolation plate is installed above the inlet of the reaction liquid, the spiral separation assembly 1 is fixedly connected with the isolation plate, and the spiral separation assembly 2 is installed. inside the spiral separation assembly 1. Specifically, the spiral separation assembly 1 includes an open tube 416 and one of the spiral baffles 417. The upper end of the tube 1 is connected to the isolation plate and the port is communicated with the hydrogen outlet. The inner side of one of the spiral baffles is connected to the tube 1. The outer wall surface of one of the spiral guide plates is in contact with the inner wall surface of the cylinder, and the upper end of one of the spiral guide plates is also connected with the reaction liquid inlet. In this embodiment, the size of one of the spiral baffles is: Ф140mm/Ф64mm, the pitch is 100mm, and the total length is 350mm. The second spiral separation assembly includes a sealed tube two 418 and a second spiral guide plate 419. The second tube is installed in the first tube through the fixing plate 420, and the inner side of the second spiral guide plate is connected with the outer wall of the second tube. The outer side surface of the second flow plate is in conflict with the inner wall surface of the first pipe; the two ends of the second pipe are provided with sealing blocking plates 421 . In this embodiment, the size of the second spiral deflector is: Ф48mm/Ф22mm, the pitch is 100mm, and the total length is 350mm. The top of the cylinder is provided with a sealing plate 422 connected with its bolts, the hydrogen outlet is installed on the sealing plate, the bottom is provided with a sealing base 423 connected with its bolts, and the waste liquid outlet is installed on the sealing base.

After the reaction liquid mixed with hydrogen bubbles enters the separator body from the inlet of the reaction liquid, it flows down in a cyclone under the diversion effect of one of the spiral guide plates of the first spiral separation component. During this process, the hydrogen bubbles in the reaction liquid It will be fully mixed with the reaction solution, and the small bubbles will continue to aggregate and annihilate, thereby generating large bubbles. The air bubbles are separated from the reaction liquid at the bottom of the cylinder, and the air bubbles move upwards and collect into hydrogen gas. The reaction liquid remains at the bottom of the cylinder to form waste liquid, which is finally discharged through the waste liquid outlet. The process of the bubbles escaping from the reaction liquid will carry part of the alkali mist. The hydrogen needs to pass through the second spiral deflector of the 314 spiral separation component 2 during the upward movement. The high-speed hydrogen flow can realize the hydrogen and alkali mist under the action of centrifugal force. separation. Finally, the separated hydrogen is discharged from the hydrogen outlet, and the alkali mist flows into the bottom of the cylinder to form waste liquid. In this embodiment, when one of the liquid level sensors detects that the height of the waste liquid exceeds 450mm, the fourth solenoid valve is opened, and the waste liquid flows to the waste liquid tank through the second filter, the waste liquid discharge pressure reducing valve and the fourth solenoid valve in turn. .

Specifically, the hydrogen cleaner 5 includes the fifth 501 solenoid valve, the cleaner body 502, the sixth pressure sensor 503, the second liquid level sensor 504, the third temperature sensor 505, the conductivity sensor 506, the cleaning liquid inlet system 507, Hydrogen outlet pressure reducing valve 508, solenoid valve 7 509, filter 4 510, cleaning liquid discharge pressure reducing valve 511, solenoid valve 8 512. The fifth solenoid valve is respectively connected to the hydrogen outlet of the separator body and the hydrogen inlet pipe of the cleaner body. The sixth pressure sensor, the second liquid level sensor, the third temperature sensor and the conductivity sensor are respectively installed on the cleaner body and are responsible for monitoring The liquid level, pressure, temperature and conductivity of the liquid in the washer body. The clean water inlet pipe of the washer body is connected to the cleaning liquid inlet system, and the cleaning liquid inlet system includes the third filter 513, the cleaning liquid inlet pump 514, the third one-way valve 515 and the sixth solenoid valve connected in sequence 516. The waste liquid outlet pipe of the washer body is sequentially connected with the fourth filter, the cleaning liquid discharge pressure reducing valve, the eighth solenoid valve and the waste liquid tank. The hydrogen outlet pipe of the cleaner body is also connected to the hydrogen outlet pressure reducing valve and the seventh solenoid valve in sequence, and then connected to the hydrogen buffer tank or the use device through the pipeline.

When the device is started, the sixth solenoid valve is opened, the cleaning liquid inlet pump is started, and the cleaning water is pumped into the washer body through the third one-way valve. When the second liquid level sensor detects that the liquid level of the cleaning water in the washer body exceeds 450mm, the sixth solenoid valve is closed. The conductivity sensor can monitor the conductivity of the cleaning water in the cleaner body in real time. When the conductivity of the cleaning water reaches the set value (500μS/cm), open the eighth solenoid valve, the sixth solenoid valve and the cleaning liquid inlet pump. The second liquid level sensor monitors the liquid level height of the cleaning liquid in real time. Since the discharge volume is much larger than the liquid inlet volume, when the liquid level is lower than 100mm, the eighth solenoid valve is closed. When the liquid level is higher than 450mm, close the sixth solenoid valve and the cleaning liquid inlet pump.

As shown in FIGS. 9-12, in this embodiment, the washer body 502 includes a sealed washing pipe 517, a third spiral separation assembly 518, a diffusion tank 519, a hydrogen inlet pipe 520, a hydrogen outlet pipe 521, a clean water inlet pipe 522 and Waste liquid outlet pipe 523. The third spiral separation assembly is arranged on the inner and upper part of the washing pipe, the diffusion box is arranged on the inner and lower part of the washing pipe, one end of the hydrogen inlet pipe is inserted from the top of the washing pipe and connected with the diffusion box, and the hydrogen outlet pipe is arranged on the upper side of the washing pipe, The clean water inlet pipe is arranged at the lower side of the washing pipe, and the waste liquid outlet pipe is arranged at the side bottom of the washing pipe. Specifically, the third spiral separation assembly includes a sealed tube three 524 and a third spiral deflector 525, the third tube is sleeved on the hydrogen inlet pipe, the inner side of the third spiral deflector is connected with the outer wall of the third tube, and the spiral The outer side surface of the third deflector is in conflict with the inner wall surface of the washing pipe. The top of the washing pipe is provided with a sealing plate 526 which is bolted to it, and the bottom is provided with a sealing base 527 which is bolted to it. The diffusion box includes an inner steel paper layer 528 and an outer steel paper layer 529, the inner steel paper layer is woven from 30 mesh steel paper, and the outer steel paper layer is woven from 100 mesh steel paper. The diffusion box is connected to the hydrogen inlet pipe through the connecting plate 530 . In this embodiment, the diffusion box is arranged in the washing water of the washing pipe, 100 mm away from the bottom plate of the washing pipe. The hydrogen enters the diffusion box through the hydrogen inlet pipe, the speed of the gas decreases after passing through the diffusion box, the lye diffuses rapidly, and fully contacts with the cleaning water to ensure the cleaning effect. When the hydrogen escapes from the cleaning liquid, it will carry a small amount of droplets, but the hydrogen needs to pass through the third spiral deflector during the upward movement. The high-speed hydrogen flow can realize the separation of hydrogen and droplets under the action of centrifugal force. Finally, the separated hydrogen is discharged from the hydrogen outlet pipe, and flows into the hydrogen buffer tank or the use device through the pipeline, and the separated cleaning liquid is merged into the cleaning liquid at the bottom of the washing pipe.

The sodium borohydride solution storage tank, the air-cooled reactor body, the separator body, the cleaner body, etc. in this embodiment can be made of 316L stainless steel. The check valve can be a mechanical check valve with an opening pressure of 0.05MPa and a pressure resistance of 20MPa. The solenoid valve adopts the solenoid valve with corrosion resistance and pressure resistance level of 4.0MPa. The second-stage gear pump , the third-stage gear pump and the cleaning liquid inlet pump all use external gear pumps, the power supply voltage is DC24V or 48V, and the lift can reach 20bar. The first-stage diaphragm pump adopts high suction lift and low lift pump, and the power supply voltage is DC24V or 48V. Pressure relief valve, automatic overpressure relief valve set pressure relief pressure 4.0MPa. The pressure reduction range of waste liquid discharge pressure reducing valve, cleaning liquid discharge pressure reducing valve and hydrogen outlet pressure reducing valve is 0.1～1.2MPa.

Specifically, as shown in FIG. 13 , the control system 7 includes a digital-to-analog converter 701 , a Siemens microprocessor 702 , a touch screen 703 , a mouse 704 , an intermediate relay 705 and a relay 706 . The digital-to-analog converter is respectively connected with the pressure sensor group 707, the temperature sensor group 708, the liquid level sensor group 709 and the conductivity sensor 506, and the Siemens microprocessor is respectively connected with the digital-to-analog converter, the touch screen, the mouse and the intermediate relay. It is connected to the relay and the solenoid valve group 710 , and the relay is respectively connected to the air-cooled reactor body 302 and the pump group 711 . The pressure sensor group includes one pressure sensor, two pressure sensors, three pressure sensors, four pressure sensors, five pressure sensors and six pressure sensors. The temperature sensor group includes one of the temperature sensors, the second of the temperature sensors and the third of the temperature sensors. The liquid level sensor group includes one liquid level sensor and two liquid level sensors. The solenoid valve group includes one solenoid valve, two solenoid valves, three solenoid valves, four solenoid valves, five solenoid valves, six solenoid valves, seven solenoid valves and eight solenoid valves. The pump set includes a first-stage diaphragm pump, a second-stage gear pump, a third-stage gear pump and a cleaning liquid inlet pump.

The digital-to-analog converter performs analog/digital and digital/analog conversion to realize the communication between the Siemens microprocessor and the connected components. The fourth pressure sensor collects the reaction pressure in the air-cooled reactor body, and transmits the signal to the Siemens microprocessor, so as to compare with the set pressure value, adjust the speed of the secondary gear pump and the third gear pump, so as to control the system. Hydrogen production rate. One of the temperature sensors can detect the temperature of the reaction bed of the air-cooled reactor body, the second temperature sensor can detect the internal temperature of the separator body, and the third temperature sensor can detect the internal temperature of the cleaner body. All of the above sensor signals can be transmitted to the Siemens microprocessor and display real-time information on the touch screen.

As shown in Figure 14, when in use, the system is powered on and initialized, the hydrogen production rate is set through the touch screen or mouse, and the pressure and temperature parameters of the air-cooled reactor corresponding to different hydrogen production rates are preset in the Siemens microprocessor. The rate of hydrogen production, the concentration of sodium borohydride solution, and the expected conversion rate are calculated and controlled to control the influent amount of sodium borohydride solution. When the pressure of the air-cooled reactor body is not within the set range, adjust the rotational speed of the secondary gear pump and the tertiary gear pump. When the bed temperature of the air-cooled reactor body is not within the set range, the rotational speed of its cooling fan is adjusted. The parameters were set, the reaction pressure of the air-cooled reactor body 1 was set to 1.5-2.0 MPa, the temperature of the reaction bed was set to 80±10°C, and the hydrogen outlet pressure was set to 0.8-1.2 MPa.

In this embodiment, the pressure signal is mainly used as the feedback signal to control the hydrogen production rate of the device, so that the error between the hydrogen production rate and the initial set hydrogen production rate is within the allowable range. The adjustment of the hydrogen production rate sets a first-level feedback adjustment. The initial set hydrogen production rate is used to calculate the working control voltage and pressure set value of the gear pump. When the error between the pressure in the air-cooled reactor body and the set pressure value exceeds The allowable range, then further adjust the working control voltage of the gear pump until the pressure error value is within the allowable range. The temperature control of the reaction bed of the air-cooled reactor body is also set with a first-level feedback adjustment. The set temperature of the bed is 80 °C ± 10 °C. When the bed temperature is not within the set temperature range, adjust the cooling fan until the temperature reach the design value.

In this example, sodium borohydride solution with a concentration of 12% is used, the liquid inlet rate of the secondary gear pump and the third gear pump is 1500 mL/min, the system design pressure is 1.5～2.0MPa, and the pressure of the hydrogen outlet pressure reducing valve is 0.8～ 1.2MPa. The sensor feeds back the collected pressure, temperature, liquid level data, and conductivity signals to the Siemens microprocessor.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should It is understood that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims (15)

1. A high-power sodium borohydride hydrolysis hydrogen production device is characterized by comprising a sodium borohydride solution storage tank, a sodium borohydride solution feeding system, a sodium borohydride hydrolysis hydrogen production reactor, a hydrogen separator, a hydrogen cleaner, a waste liquid tank and a control system; the sodium borohydride solution storage tank supplies a sodium borohydride solution to the sodium borohydride hydrolysis hydrogen production reactor through the sodium borohydride solution feeding system, the hydrogen separator performs gas-liquid separation on hydrogen-containing liquid discharged by the sodium borohydride hydrolysis hydrogen production reactor, the hydrogen cleaner performs purification cleaning on hydrogen discharged by the hydrogen separator, and the waste liquid tank collects the liquid discharged by the hydrogen separator and the hydrogen cleaner; the control system is respectively connected with the sodium borohydride solution feeding system, the sodium borohydride hydrolysis hydrogen production reactor, the hydrogen separator and the hydrogen cleaner so as to control the operation of the hydrogen borohydride solution feeding system, the sodium borohydride hydrolysis hydrogen production reactor, the hydrogen separator and the hydrogen cleaner; the sodium borohydride hydrolysis hydrogen production reactor adopts an induced draft cooling mode, and the hydrogen separator adopts a cyclone liquid inlet mode.

2. The high-power sodium borohydride hydrolysis hydrogen production device according to claim 1, wherein the sodium borohydride solution feeding system comprises a first-stage diaphragm pump, a second-stage gear pump and a third-stage gear pump which are sequentially connected along a liquid flow direction, an inlet of the first-stage diaphragm pump is connected with the sodium borohydride solution storage tank, and an outlet of the third-stage gear pump is connected with the sodium borohydride hydrolysis hydrogen production reactor.

3. The high-power sodium borohydride water hydrolysis hydrogen production device according to claim 2, characterized in that a pipeline connecting the first-stage diaphragm pump and the sodium borohydride solution storage tank is provided with one of a filter and a solenoid valve, an outlet of the first-stage diaphragm pump is provided with one of a pressure sensor, an outlet of the second-stage gear pump is provided with a second of a pressure sensor, and an outlet of the third-stage gear pump is provided with a third of a pressure sensor and a one-way valve; the sodium borohydride solution feeding system further comprises an overpressure relief assembly, one end of the overpressure relief assembly is connected with the inlet of the first-stage diaphragm pump, the other end of the overpressure relief assembly is connected with the outlet of the third-stage gear pump, and the overpressure relief assembly comprises a second one-way valve and a relief valve which are connected.

4. The high-power sodium borohydride hydrolysis hydrogen production device according to claim 1, wherein the sodium borohydride hydrolysis hydrogen production reactor comprises an air cooling reactor body, the air cooling reactor body comprises a tube box, finned tubes are arranged in the tube box, sodium borohydride hydrolysis catalyst is filled in the finned tubes, and a heat dissipation fan is further mounted on the surface of the tube box.

5. The high-power sodium borohydride hydrolysis hydrogen production device according to claim 4, characterized in that an upper cover plate and a lower cover plate are respectively arranged at two ends of the tube box, a liquid inlet communicated with one end of the finned tube is arranged on the lower cover plate, a liquid outlet communicated with the other end of the finned tube is arranged on the upper cover plate, the finned tubes are arranged in the tube box in an equilateral triangle shape, screens for preventing the sodium borohydride hydrolysis catalyst from being separated from the tube are arranged at two ends of the finned tubes, and one of the temperature sensors and four of the pressure sensors are arranged on the upper cover plate.

6. The high-power sodium borohydride water hydrolysis hydrogen production device according to claim 5, wherein the sodium borohydride water hydrolysis hydrogen production reactor further comprises a cross joint, one end of the cross joint is a liquid inlet and is connected with a liquid outlet of the air cooling reactor body, the other end of the cross joint is connected with an automatic overpressure relief valve, the other end of the cross joint is connected with a manual overpressure relief valve, and the last end of the cross joint is a liquid outlet and is connected with the hydrogen separator; and a second electromagnetic valve is arranged at the liquid inlet of the air-cooled reactor body and is connected with the sodium borohydride solution feeding system.

7. The high-power sodium borohydride hydrolysis hydrogen production device according to claim 6, wherein the hydrogen separator comprises a separator body, the separator body comprises a sealed cylinder, a reaction liquid inlet is formed in the upper side of the cylinder, a hydrogen outlet is formed in the top end of the cylinder, a waste liquid outlet is formed in the bottom end of the cylinder, a first spiral separation assembly, a second spiral separation assembly and a partition plate are arranged on the inner upper portion of the cylinder, the partition plate is installed above the reaction liquid inlet, the first spiral separation assembly is fixedly connected with the partition plate, and the second spiral separation assembly is installed inside the first spiral separation assembly.

8. The high-power sodium borohydride water hydrolysis hydrogen production device according to claim 7, characterized in that the first spiral separation assembly comprises an open first pipe and one of spiral flow deflectors, the upper end of the first pipe is connected with the isolation plate and the port of the first pipe is communicated with the hydrogen outlet, the inner side surface of the one of the spiral flow deflectors is connected with the outer wall surface of the first pipe, the outer side surface of the one of the spiral flow deflectors is abutted against the inner wall surface of the cylinder, and the upper end of the one of the spiral flow deflectors is further connected with the reaction liquid inlet.

9. The high-power sodium borohydride water hydrolysis hydrogen production device according to claim 7, characterized in that the second spiral separation assembly comprises a sealed second pipe and a second spiral guide plate, the second pipe is installed in the first pipe through a fixing plate, the inner side surface of the second spiral guide plate is connected with the outer wall surface of the second pipe, and the outer side surface of the second spiral guide plate is abutted against the inner wall surface of the first pipe.

10. The high-power sodium borohydride water hydrolysis hydrogen production device according to claim 7, characterized in that the reaction liquid inlet is provided with a third electromagnetic valve, the third electromagnetic valve is connected with a liquid outlet of the four-way valve, the waste liquid outlet is connected with the waste liquid tank, the hydrogen outlet is connected with the hydrogen cleaner, the cylinder is provided with a first liquid level sensor, a second temperature sensor and a fifth pressure sensor, and a second filter, a waste liquid discharge pressure reducing valve and a fourth electromagnetic valve are further arranged between the waste liquid outlet and the waste liquid tank.

11. The high-power sodium borohydride hydrolysis hydrogen production device according to claim 1, characterized in that the hydrogen cleaner comprises a cleaner body, the cleaner body comprises a sealed washing pipe, a third spiral separation component, a diffusion box, a hydrogen inlet pipe, a hydrogen outlet pipe, a purified water inlet pipe and a waste liquid outlet pipe, the third spiral separation component is arranged at the upper part of the washing pipe, the diffusion box is arranged at the lower part of the washing pipe, one end of the hydrogen inlet pipe is inserted into the top end of the washing pipe and connected with the diffusion box, the hydrogen outlet pipe is arranged at the upper part of the washing pipe, the purified water inlet pipe is arranged at the lower part of the washing pipe, and the waste liquid outlet pipe is arranged at the bottom of the washing pipe.

12. The high-power sodium borohydride water hydrolysis hydrogen production device according to claim 11, characterized in that the third spiral separation assembly comprises a third sealed pipe and a third spiral guide plate, the third pipe is sleeved on the hydrogen inlet pipe, the inner side surface of the third spiral guide plate is connected with the outer wall surface of the third pipe, and the outer side surface of the third spiral guide plate is abutted against the inner wall surface of the washing pipe.

13. The high-power sodium borohydride water hydrolysis hydrogen production device according to claim 11, wherein the diffusion box comprises an inner steel paper layer and an outer steel paper layer, the inner steel paper layer is formed by weaving 30-mesh steel paper, the outer steel paper layer is formed by weaving 100-mesh steel paper, and the diffusion box is connected with the hydrogen inlet pipe through a connecting plate.

14. The high-power sodium borohydride water hydrolysis hydrogen production device according to claim 11, characterized in that a fifth electromagnetic valve is arranged on a pipeline connecting the hydrogen inlet pipe and the hydrogen separator, the purified water inlet pipe is further connected with a cleaning solution inlet system, the cleaning solution inlet system comprises a third filter, a third cleaning solution inlet pump, a third check valve and a sixth electromagnetic valve which are sequentially arranged along a liquid flow direction, the hydrogen outlet pipe is further connected with a hydrogen outlet pressure reducing valve and a seventh electromagnetic valve which are sequentially arranged along a pipeline, a fourth filter, a eighth cleaning solution discharge pressure reducing valve and an eighth electromagnetic valve are further arranged on a pipeline connecting the waste liquid outlet pipe and the waste liquid tank, and a sixth pressure sensor, a second liquid level sensor, a third temperature sensor and a conductivity sensor are further arranged on the cleaning pipe.

15. The high-power sodium borohydride hydrolysis hydrogen production device according to claim 1, wherein the control system comprises a digital-to-analog converter, a Siemens microprocessor, a touch screen, a mouse, an intermediate relay and a relay.

Images