CN212425434U

CN212425434U - Integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device

Info

Publication number: CN212425434U
Application number: CN202021844304.3U
Authority: CN
Inventors: 刘啸; 谢镭; 郑捷; 李星国; 时雨; 臧翔
Original assignee: Jiangsu Jicui Molecule Engineering Research Institute Co ltd
Current assignee: Suzhou Qingde Hydrogen Energy Technology Co ltd
Priority date: 2020-08-29
Filing date: 2020-08-29
Publication date: 2021-01-29
Anticipated expiration: 2030-08-29

Abstract

The utility model provides an integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device, which comprises an outer shell, wherein the inner part of the outer shell is sequentially provided with a waste liquid area, a reaction area and a separation and purification area from bottom to top; the reaction zone is provided with a catalyst lifting basket, a raw material liquid inlet is arranged on the outer shell corresponding to the reaction zone, and the raw material liquid inlet is provided with a feeding pipe extending downwards to the bottom of the catalyst lifting basket; an annular baffle is arranged between the reaction zone and the separation and purification zone. The device has high integration level, can realize continuous hydrogen production, and does not need to stop in the supply and discharge processes; the raw material liquid is fully contacted with the catalyst, and the reaction conversion rate is high; the prepared hydrogen is fully purified and can be directly supplied to a fuel cell for use.

Description

Integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device

Technical Field

The utility model belongs to the technical field of hydrogen preparation, especially, provide a but continuous operation's integrated form kilowatt level fuel cell sodium borohydride hydrogen plant that hydrolysises.

Background

The proton exchange membrane fuel cell is a power generation device which directly converts chemical energy stored in fuel into electric energy through electrochemical reaction, has the advantages of high energy density, high energy conversion efficiency, environmental friendliness and the like, and is a preferred power source for new energy automobiles, mobile electronic equipment, unmanned aerial vehicles, communication base stations and the like. To realize the scale application of fuel cells, high-density storage and rapid and safe supply of pure hydrogen are important problems to be solved urgently at present.

At present, the supply of hydrogen fuel mainly comprises two modes of physical hydrogen storage and chemical hydrogen production. The physical hydrogen storage method mainly comprises high-pressure gaseous hydrogen storage and low-temperature liquid hydrogen storage. Wherein, the high-pressure gaseous hydrogen storage is convenient to use and has wide application range, but the volume energy density is low; the low-temperature liquid hydrogen storage has high energy density, but the system is complex and the cost is high. The chemical hydrogen production mainly comprises hydrocarbon steam conversion hydrogen production, methanol reforming hydrogen production, water electrolysis hydrogen production and inorganic hydride hydrolysis hydrogen production. The hydrogen production by the hydrocarbon steam conversion method and the methanol reforming method is widely applied in industry, but the prepared hydrogen contains a certain amount of CO impurities and can be used only after being purified, and the hydrogen production equipment by the two methods is complex and difficult to miniaturize; the purity of hydrogen obtained by hydrogen production through water electrolysis is very high, but the hydrogen production cost is high, the power consumption is large, and large-scale popularization cannot be realized temporarily; the hydrolysis of inorganic hydride to produce hydrogen is used as a small-sized hydrogen production method, and is very suitable for being applied to portable low-power fuel cells.

The inorganic hydride mainly comprises alkali metal hydride, alkaline earth metal hydride, borohydride and aluminum hydride, wherein, the hydrogen production by hydrolysis of sodium borohydride is the current relatively hot on-site hydrogen production technology, and the advantages mainly comprise: (1) the hydrogen production efficiency is high. The hydrogen content of sodium borohydride is up to 10.8 wt%, and hydrogen is completely released under the catalytic action of the catalyst, which can reach over 90%. (2) The purity of the hydrogen is higher. The hydrogen generated by the hydrolysis of sodium borohydride does not contain CO, and complex purification treatment is not needed. (3) The reaction condition is mild, and the speed is controllable. The hydrolysis reaction of sodium borohydride can be carried out at room temperature, and the hydrogen production rate can be conveniently controlled by controlling the concentration and the feeding flow of the sodium borohydride solution. (4) The safety is high. The sodium borohydride is stable in nature in dry air, convenient to store and transport, and the alkaline solution is very stable and can not undergo self-hydrolysis.

At present, in the published documents of sodium borohydride hydrogen production reaction devices (such as CN103253631A, CN106744678B, CN203238030U, CN203402923U, CN203741035U, etc.), part of reaction raw material liquid in the devices passes through the catalyst coated on the bed layer from top to bottom or from bottom to top, so that the contact time between the raw material liquid and the catalyst is short and insufficient, and incomplete reaction or low hydrogen production rate is easily caused. Part of the hydrogen production devices are fed intermittently, and hydrogen cannot be produced continuously. In addition, NaOH and NaBO can be entrained in hydrogen generated by hydrolysis reaction of sodium borohydride₂If alkaline impurities enter the fuel cell, the performance and the service life of the cell are greatly influenced, so that hydrogen prepared by hydrolyzing sodium borohydride can be supplied to the fuel cell only after being sufficiently purified, and the problem is not solved in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device, which has high integration level, can realize continuous hydrogen production and does not need to be stopped in the supply and discharge processes; the raw material liquid is fully contacted with the catalyst, and the reaction conversion rate is high; the prepared hydrogen is fully purified and can be directly supplied to a fuel cell for use.

The utility model discloses a realize like this:

an integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device comprises an outer shell, wherein a waste liquid area, a reaction area and a separation and purification area are sequentially arranged inside the outer shell from bottom to top; the reaction zone comprises a reactor, a catalyst lifting basket is arranged in the reactor, a raw material liquid inlet is arranged on an outer shell corresponding to the reaction zone, and a feeding pipe extending downwards to the bottom of the catalyst lifting basket is arranged on the raw material liquid inlet; an annular baffle is arranged between the reaction zone and the separation and purification zone.

Specifically, the reaction zone is provided with a first temperature display table for measuring the reaction temperature; the catalyst lifting basket is used for containing a catalyst and comprises a solid bottom surface, a solid side wall arranged around the solid bottom surface, a mesh side wall arranged above the solid side wall, a mesh cover arranged on the inner side of the mesh side wall and a mesh hanging lug arranged above the mesh side wall; the catalyst lifting basket is fixed in the outer shell of the reaction area through mesh hangers.

The device further comprises a raw material liquid storage tank, wherein the raw material liquid storage tank is communicated with the feeding pipe through a feeding pump; the raw material liquid storage tank is provided with a first high/low liquid level indicator, and the inlet pipe is provided with a one-way valve.

Specifically speaking, the top of the raw material liquid storage tank is provided with an emptying valve and a raw material liquid inlet, and the raw material liquid inlet is provided with a first electromagnetic valve interlocked with a first high/low liquid level indicator.

Further, the separation purification area comprises a condenser and a drying and alkali removal tank, the condenser comprises a plurality of heat exchange tubes arranged in parallel, and hydrogen generated by reaction in the reaction area is cooled through the heat exchange tubes; cooling water cavities are arranged among the heat exchange tubes and between the heat exchange tubes and the outer shell, and a liquid inlet and a liquid outlet are formed in the outer shell corresponding to the condenser; and a second temperature display table for measuring the temperature of the cooled gas is arranged between the condenser and the drying and alkali removing tank.

Specifically, mesh baffles are arranged on the upper part and the lower part of each drying and alkali removing tank, and a drying agent and an alkali removing agent are filled between the two mesh baffles; the shell body above the drying agent and the alkali removing agent is provided with a hydrogen outlet.

Further, the waste liquid district includes the waste liquid storage tank, waste liquid storage tank bottom is equipped with heat exchange coil, heat exchange coil one end links to each other with the liquid outlet on the condenser shell body, and the other end extends the shell body that the waste liquid district corresponds.

Specifically, a waste liquid outlet is formed in the bottom of the waste liquid area, a second high-low liquid level indicator is arranged in the waste liquid area, and a second electromagnetic valve linked with the second high-low liquid level indicator is arranged on the waste liquid outlet; the waste liquid area is provided with a third temperature display meter for measuring the temperature of the cooled waste liquid.

Preferably, the waste liquid area is provided with a pressure display meter and a pressure relief pipe, and the pressure relief pipe is provided with a safety valve interlocked with the pressure display meter.

The utility model has the advantages that:

(1) the hydrogen production device has high integration level. The reactor, the condenser, the drying alkali removal tank and the waste liquid storage tank are designed into a whole, so that the volume and the weight of the device are greatly reduced, and the hydrogen storage density of the device is obviously improved.

(2) The hydrogen production device of the utility model has high automation degree. Through the interlocking of high-low liquid level indicator and solenoid valve, can the automatic control feed liquor's fluid replacement and the emission of waste liquid, supply and discharge process need not to shut down, and hydrogen manufacturing can go on in succession.

(3) The hydrogen production device of the utility model has short hydrogen production response time, stable hydrogen production speed and sufficient reaction. The raw material liquid gradually rises from the bottom of the catalyst lifting basket after entering the reactor, and is discharged out of the catalyst lifting basket after reaching the side wall of the mesh, the retention time of the raw material liquid is sufficient, the raw material liquid can fully contact and react with the catalyst, and the reaction conversion rate can reach more than 85%.

(4) The hydrogen production rate of the hydrogen production device of the utility model is adjustable. The hydrogen production rate can be very conveniently controlled by changing the concentration of sodium borohydride in the raw material liquid and the feeding rate of the feeding pump, and the method is suitable for fuel cells with different powers from tens of watts to thousands of watts.

(5) The hydrogen purity of the hydrogen production device of the utility model is high. The condenser has the functions of condensation and gas-liquid separation, and can separate most of water vapor carried in hydrogen, NaOH and NaBO₂When the alkaline impurities are equal, the drying agent and the alkaline removing agent in the drying alkaline removing tank can further dry and purify the hydrogen, and the purified hydrogen can beFor direct supply to the fuel cell.

(6) The hydrogen production device of the utility model is safe to use. The temperature of the reaction zone, the temperature of the cooled hydrogen and the temperature of the cooled waste liquid can be monitored in real time through the temperature display meter, and the reaction condition can be mastered at any time. The device is provided with a safety valve, and when the pressure of the system reaches a high limit, the safety valve automatically opens the relief pressure to prevent the system from generating accidents due to overpressure.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of an integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device of the present invention;

fig. 2 is a schematic structural diagram of the catalyst basket of the present invention.

Icon:

1-raw material liquid storage tank, 2-feeding pump, 3-one-way valve, 4-1 high/low liquid level indicator, 5-1 electromagnetic valve, 6-emptying valve, 7-reactor, 8-catalyst basket, 9-feeding pipe, 10-ring baffle, 11-1 temperature indicator, 12-condenser, 13-2 temperature indicator, 14-drying alkali removal tank, 15-mesh baffle, 16-flange, 17-waste liquid storage tank, 18-2 high/low liquid level indicator, 19-2 electromagnetic valve, 20-heat exchange coil, 21-3 temperature indicator, 22-pressure indicator, 23-safety valve, 24-cooling water inlet, 25-cooling water outlet, 26-solid bottom surface, 27-solid side wall, 28-mesh side wall, 29-mesh cover, 30-mesh hangers.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

The purpose of this embodiment is in order to provide an integrated form kilowatt-level fuel cell sodium borohydride hydrogen plant that hydrolysises, including shell body and raw materials liquid storage tank 1, inside waste liquid district, reaction zone and the separation purification zone of establishing in proper order from up down of shell body. Referring to fig. 1, the waste liquid zone is a waste liquid storage tank 17, the reaction zone is a reactor 7, and the separation and purification zone comprises a condenser 12 and a drying and alkali removal tank 14. That is, essentially, the apparatus is composed of a raw material liquid storage tank 1, a feed pump 2, a reactor 7, a condenser 12, a dry alkali removal tank 14, a waste liquid storage tank 17, and other accessories.

In detail, the raw material liquid storage tank is connected with a feed pump through a pipeline, the feed pump is connected into the reactor through an inlet pipe 9, and an annular baffle plate 10 is welded on the inlet pipe. A one-way valve 3 is arranged on a pipeline between the feeding pump and the reactor to prevent the backflow of the fluid. Be provided with 1 high/low liquid level indicator 4 in the raw materials liquid storage tank, 1 high/low liquid level indicator interlocks with 1 solenoid valve 5, can carry into the raw materials liquid storage tank with the raw materials liquid automatically. The stock solution storage tank top design atmospheric valve 6 prevents jar interior negative pressure.

The reactor 7, the condenser 12, the drying and alkali removing tank 14 and the waste liquid storage tank 17 are designed into a whole, and share one outer shell. Wherein the top ends of the reactor and the dry caustic removal tank are sealed with a flange 16. A catalyst basket 8 is provided in the reactor.

Referring to fig. 2, the catalyst basket 8 is fixed inside the reactor and used for containing the catalyst, and the catalyst basket 8 can be directly taken out of the reactor, so that the catalyst can be conveniently replaced. The raw material liquid enters the reactor and reacts with the catalyst in the catalyst basket 8 to generate hydrogen, and the hydrogen enters the tube pass of the condenser 12 from the top of the reactor. A temperature display table No. 1 was inserted into the reactor 7 to indicate the temperature of the reaction zone. The feeding pipe extends into the bottom of the catalyst lifting basket in the reactor; the catalyst can be one or more of a supported noble metal catalyst, a supported non-noble metal catalyst or a supported non-metal catalyst. In detail, the catalyst carrier 8 comprises a solid bottom surface 26, a solid side wall 27, a mesh side wall 28, a mesh cover 29 and a mesh lug 30, wherein the solid bottom surface 26 and the solid side wall 27 enable reaction liquid to have enough residence time in the catalyst carrier 8 to fully react with a catalyst, the mesh side wall enables raw material liquid after full reaction to overflow from a mesh and enter a waste liquid storage tank, the mesh cover is used for fixing the catalyst and simultaneously enabling hydrogen generated by reaction to pass, and the mesh lug is used for fixing the catalyst carrier in a reactor. The raw material liquid is a mixed solution of sodium borohydride and sodium hydroxide, and the solution is alkaline and can inhibit the self-hydrolysis reaction of the sodium borohydride.

The condenser 12 cools water vapor and solution droplets carried in the hydrogen gas into a liquid phase state by external cooling water, and the cooled hydrogen gas enters a drying and alkali removing tank. A No. 2 temperature display table 13 is connected between the condenser 12 and the drying and alkali removing tank 14 and used for indicating the temperature of the cooled gas. External cooling water enters from a cooling water inlet 24, sequentially passes through the condenser and the heat exchange coil at the bottom of the waste liquid storage tank, and then flows out from a cooling water outlet 25.

The drying and alkali removing tank 14 is filled with a drying agent and an alkali removing agent for further drying and alkali removing purification treatment of the cooled hydrogen. The upper end and the lower end of the drying and alkali removing tank 14 are both provided with mesh baffles 15 for fixing a drying agent and an alkali removing agent; the top of the drying and alkali removing tank is provided with a pure hydrogen outlet for a fuel cell. The drying agent in the drying and alkali removing tank 14 can be one or a mixture of more of molecular sieve, sponge, anhydrous calcium chloride, allochroic silica gel, cotton, activated carbon and the like; the alkali remover can be one or a mixture of more of molecular sieve, heteropoly acid, boric acid, cation exchange resin and the like; the drying agent is arranged before the alkali remover or the drying agent is arranged before and after the alkali remover.

A No. 2 high/low liquid level indicator 18 is arranged in the waste liquid storage tank, and the No. 2 high/low liquid level indicator is interlocked with a No. 2 electromagnetic valve 19 and can automatically discharge waste liquid. The bottom of the waste liquid storage tank is provided with a heat exchange coil 20, and waste liquid heat is carried away by external cooling water. A No. 3 temperature display table 21 is connected into the waste liquid storage tank and used for indicating the temperature of the cooled waste liquid. A pressure display meter 22 is connected into the waste liquid storage tank and is interlocked with a safety valve 23, and when the pressure in the waste liquid storage tank reaches a high limit, the safety valve automatically opens the pressure of a discharge system.

In addition, each part of the hydrogen production apparatus of this embodiment is made of an alkali corrosion resistant material, such as stainless steel or polytetrafluoroethylene.

When in use, the flow is as follows:

before hydrogen production, raw material liquid is supplemented into a raw material liquid storage tank 1 from the outside, when the liquid level of the raw material liquid reaches the high liquid level of a No. 1 high/low liquid level indicator 4, a No. 1 electromagnetic valve 5 is closed, and liquid supplement is stopped; the catalyst in the catalyst basket 8 and the drying agent and the alkali removing agent in the drying alkali removing tank 14 are filled, and the flange is screwed down.

When the device is used for producing hydrogen, external cooling water is opened, enters from a cooling water inlet 24, sequentially passes through the condenser 12 and the heat exchange coil 20, and flows out from a cooling water outlet 25; the flow rate of the feed pump 2 is set and then started. The feed pump carries the raw materials liquid in the raw materials liquid storage tank to catalyst basket 8 bottom in reactor 7, and the raw materials liquid takes place the reaction after contacting with the catalyst and begins to produce hydrogen, and solid bottom surface 26 and solid lateral wall 27 of catalyst basket make the reaction liquid have enough dwell time fully to react in the catalyst basket, and when the raw materials liquid level reached the mesh lateral wall 28 of catalyst basket, the raw materials liquid after the full reaction spills over from the mesh and gets into waste liquid storage tank 17. The hydrogen generated by the reaction passes through the mesh cover 29 of the catalyst basket and enters the tube side of the condenser 12 to be cooled, the water vapor and the solution fog drops carried in the hydrogen are cooled to be in a liquid phase state, the water vapor and the solution fog drops cooled to be in the liquid phase drop from the condenser onto the annular baffle plate 10, and then the water vapor and the solution fog drops penetrate through the meshes of the mesh hangers 30 to enter the waste liquid storage tank. And the cooled hydrogen enters a drying and alkali removing tank for further drying and alkali removing purification treatment, and the purified hydrogen is used for the fuel cell.

When the liquid level of the raw material liquid in the raw material liquid storage tank is reduced to the low liquid level of the No. 1 high/low liquid level indicator, the No. 1 electromagnetic valve is opened to supplement the liquid. When the liquid level of the waste liquid in the waste liquid storage tank reaches the high liquid level of the No. 2 high/low liquid level indicator 18, the No. 2 electromagnetic valve 19 is opened, and the waste liquid in the waste liquid storage tank is discharged outwards. When the liquid level of the waste liquid is reduced to the low liquid level of the No. 2 high/low liquid level indicator, the No. 2 electromagnetic valve is closed, and the liquid discharge is stopped.

When the pressure display meter 22 detects that the pressure in the waste liquid storage tank reaches a high limit, the safety valve 23 automatically opens the relief pressure to prevent the system from generating danger due to overpressure.

In order to better verify the use effect of the hydrogen production device in the embodiment, the following experiments are specifically performed:

example 1

According to the assembly device shown in the figure 1, the whole device is made of stainless steel, the raw material solution is 5 wt% of sodium borohydride + 2 wt% of sodium hydroxide solution, the catalyst is a supported non-noble metal catalyst, the drying agent and the alkali remover are allochroic silica gel and a molecular sieve respectively, the allochroic silica gel is placed in front of the molecular sieve, and the flow rate of the feeding pump is set to be 60 mL/min.

Tests show that the hydrogen production rate is stable after feeding for 1.5 min, the hydrogen production rate is 6.4L/min, and hydrogen can be continuously supplied to a fuel cell with the power of 500W. After the hydrogen is continuously and stably produced for 150 min, the conversion rate of the sodium borohydride hydrogen production is calculated to be 91%, hydrogen produced by the device is introduced into a certain amount of deionized water, the pH value of the deionized water is not changed, and the prepared hydrogen is fully purified.

Example 2

According to the assembly device shown in the figure 1, the whole device is made of stainless steel, the raw material solution is 10 wt% of sodium borohydride + 4 wt% of sodium hydroxide solution, the catalyst is a supported non-noble metal catalyst, the drying agent and the alkali removing agent are respectively molecular sieves and boric acid, the molecular sieves are arranged before and after the boric acid, and the flow rate of the feeding pump is set to be 52 mL/min.

Tests show that the hydrogen production rate is stable after feeding for 2.5 min, the hydrogen production rate is 11.9L/min, and hydrogen can be continuously supplied to a fuel cell with the power of 1000W. After 120 min of continuous and stable hydrogen production, the conversion rate of hydrogen production by sodium borohydride is calculated to be 88%, hydrogen produced by the device is introduced into a certain amount of deionized water, the pH value of the deionized water is not changed, and the prepared hydrogen is fully purified.

Example 3

According to the assembly device shown in the figure 1, the whole device is made of stainless steel, the raw material solution is 15 wt% of sodium borohydride and 5 wt% of sodium hydroxide solution, the catalyst is a supported non-noble metal catalyst, the drying agent and the alkali removing agent are allochroic silica gel and heteropoly acid respectively, the allochroic silica gel is placed in front of and behind the heteropoly acid, and the flow rate of the feeding pump is set to be 60 mL/min.

Tests show that the hydrogen production rate is stable after feeding for 4.5 min, the hydrogen production rate is 20.8L/min, and hydrogen can be continuously supplied to a fuel cell with the power of 2000W. After 120 min of continuous and stable hydrogen production, the conversion rate of sodium borohydride hydrogen production is calculated to be 85%, hydrogen produced by the device is introduced into a certain amount of deionized water, the pH value of the deionized water is not changed, and the prepared hydrogen is fully purified.

Therefore, the hydrogen production device can solve the technical problems of incomplete reaction, low hydrogen production rate, discontinuous hydrogen production and incomplete hydrogen purification in the conventional sodium borohydride hydrolysis hydrogen production device. The integration level is high, hydrogen can be continuously produced, and the supply and discharge processes do not need to be stopped; the raw material liquid is fully contacted with the catalyst, and the reaction conversion rate is high; the prepared hydrogen is fully purified and can be directly supplied to a fuel cell for use.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device is characterized by comprising an outer shell, wherein a waste liquid area, a reaction area and a separation and purification area are sequentially arranged inside the outer shell from bottom to top; the reaction zone comprises a reactor (7), a catalyst basket (8) is arranged in the reactor, a raw material liquid inlet is arranged on an outer shell corresponding to the reaction zone, and a feeding pipe (9) extending downwards to the bottom of the catalyst basket is arranged on the raw material liquid inlet; an annular baffle (10) is arranged between the reaction zone and the separation and purification zone.

2. The integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device according to claim 1, characterized in that the reaction zone is provided with a temperature display table (11) for measuring the reaction temperature; the catalyst lifting basket (8) is used for containing a catalyst and comprises a solid bottom surface (26), a solid side wall (27) arranged around the solid bottom surface, a mesh side wall (28) arranged above the solid side wall, a mesh cover (29) arranged on the inner side of the mesh side wall and a mesh hanging lug (30) arranged above the mesh side wall; the catalyst lifting basket is fixed in the outer shell of the reaction area through mesh hangers.

3. The integrated kilowatt-grade fuel cell sodium borohydride hydrolysis hydrogen production device according to claim 1 or 2, characterized by further comprising a raw material liquid storage tank (1) which is communicated with the feeding pipe (9) through a feeding pump (2); the raw material liquid storage tank is provided with a first high/low liquid level indicator (4), and the inlet pipe is provided with a one-way valve (3).

4. The integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device according to claim 3, characterized in that the top of the raw material liquid storage tank is provided with a vent valve (6) and a raw material liquid inlet, and the raw material liquid inlet is provided with a first electromagnetic valve (5) interlocked with a first high/low liquid level indicator.

5. The integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device according to claim 4, characterized in that the separation purification area comprises a condenser (12) and a drying and alkali removal tank (14), the condenser comprises a plurality of heat exchange tubes arranged in parallel, and hydrogen generated by the reaction in the reaction area is cooled through the heat exchange tubes; cooling water cavities are arranged among the heat exchange tubes and between the heat exchange tubes and the outer shell, and a liquid inlet and a liquid outlet are formed in the outer shell corresponding to the condenser; and a second temperature display table (13) for measuring the temperature of the cooled gas is arranged between the condenser and the drying and alkali removing tank.

6. The integrated kilowatt-grade fuel cell sodium borohydride hydrolysis hydrogen production device according to claim 5, characterized in that the drying and alkali removal tank (14) is provided with mesh baffles at the upper and lower sides, and a drying agent and an alkali removal agent are filled between the two mesh baffles; the shell body above the drying agent and the alkali removing agent is provided with a hydrogen outlet.

7. The integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device according to any one of claims 4-6, characterized in that the waste liquid area comprises a waste liquid storage tank (17), a heat exchange coil (20) is arranged at the bottom of the waste liquid storage tank, one end of the heat exchange coil is connected with a liquid outlet on the outer shell of the condenser, and the other end of the heat exchange coil extends out of the outer shell corresponding to the waste liquid area.

8. The integrated kilowatt-level fuel cell sodium borohydride hydrolysis hydrogen production device according to claim 7, characterized in that a waste liquid outlet is arranged at the bottom of the waste liquid area, a second high-low liquid level indicator (18) is arranged in the waste liquid area, and a second electromagnetic valve (19) interlocked with the second high-low liquid level indicator is arranged on the waste liquid outlet; the waste liquid area is provided with a third temperature display meter (21) for measuring the temperature of the cooled waste liquid.

9. The integrated kilowatt-grade fuel cell sodium borohydride hydrolysis hydrogen production device according to claim 8, characterized in that the waste liquid area is provided with a pressure display meter (22) and a pressure relief pipe, and the pressure relief pipe is provided with a safety valve (23) interlocked with the pressure display meter.