Multi-stage dehydrogenation device and method for organic liquid hydrogen storage

Abstract

The invention relates to the technical field of organic liquid dehydrogenation, in particular to a multistage dehydrogenation device and method for organic liquid hydrogen storage. Compared with the prior art, the multistage dehydrogenation device for organic liquid hydrogen storage has the advantages that the motor drives the stirring part to rotate, materials are stirred through the stirring part, and the materials can be uniformly heated in a water bath heating mode in cooperation with stirring of the stirring part; the first reaction tank and the second reaction tank can generate heat during dehydrogenation operation, and the heat can be transferred to a first heat exchange plate and a second heat exchange plate through heat conduction fins, so that circulating liquid in a first annular water tank and a second annular water tank can be heated; circulating liquid in the first annular water tank and the second annular water tank can be pumped into the water bath tank through a third water pump, heat released by the first reaction tank and the second reaction tank can be utilized, the initial temperature of the circulating liquid is increased, the heating time of the heater is shortened, and then the purpose of saving energy is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of organic liquid dehydrogenation, and in particular to a multi-stage dehydrogenation device and method for storing hydrogen in organic liquid. Background Art

[0002] Organic liquid hydrogen storage is a hydrogen storage technology that utilizes a chemical reaction between hydrogen and an organic medium, primarily a hydrogenation process, to store hydrogen in liquid organic matter. The basic principle of organic liquid hydrogen storage is that hydrogen is added to a liquid hydrogen storage carrier through a catalytic reaction, forming a hydrogen storage organic liquid compound that can be stably stored under normal temperature and pressure conditions. The hydrogenated product is called a hydrogen storage organic liquid or hydrogen oil, which can be transported to the user end via ordinary tank trucks. At the user end, the hydrogen storage organic liquid undergoes a catalytic dehydrogenation reaction in a dehydrogenation reaction device. After the reaction products undergo gas-liquid separation, the hydrogen is transported to hydrogen-using ends such as fuel cells.

[0003] A multi-stage dehydrogenation device is a type of dehydrogenation equipment and is a device used for hydrogen storage and dehydrogenation of organic liquids. It includes multiple dehydrogenation reactors, each of which performs a different dehydrogenation reaction to achieve staged dehydrogenation. The advantage of a multi-stage dehydrogenation device is that the dehydrogenation reaction can be performed in stages, thereby achieving efficient separation of hydrogen and efficient recovery of organic liquids. However, the dehydrogenation device generates a large amount of waste heat during operation. If it is directly dissipated into the air, it will cause a large amount of energy waste. Therefore, a propane dehydrogenation device is proposed to solve the above problems. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the shortcomings of the existing technology, the present invention provides a multi-stage dehydrogenation device and method for storing hydrogen in organic liquid, which has the advantages of energy saving and solves the problem of high energy consumption.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a multi-stage dehydrogenation device for storing hydrogen in an organic liquid, characterized in that it comprises a first reaction tank, a second reaction tank and a heating tank, the bottom of the heating tank is connected to a first water pump through a pipeline, the output end of the first water pump is fixedly connected to a feed pipe, the top of the feed pipe is fixedly connected to two shunt pipes, the two shunt pipes are respectively connected to the first reaction tank and the second reaction tank, a water bath is provided on the outside of the heating tank, the outer surfaces of the first reaction tank and the second reaction tank are fixedly connected to heat-conducting fins, the One side of the heat-conducting fin is slidably connected to the first heat exchange plate and the second heat exchange plate, one side of the first heat exchange plate is fixedly connected to the first annular water tank, and one side of the second heat exchange plate is fixedly connected to the second annular water tank. The first annular water tank and the second annular water tank are fixedly connected to the first reaction tank and the second reaction tank by bolts. The top of the water bath is fixedly connected to the second water pump and the third water pump, the second water pump is connected to the top of the first annular water tank and the second annular water tank through a tee pipe, and the third water pump is connected to the bottom of the first annular water tank and the second annular water tank through a tee pipe.

[0008] Preferably, the first reaction tank and the second reaction tank are arranged in parallel, and catalyst releasers are provided inside the first reaction tank and the second reaction tank.

[0009] Preferably, the height of the heating tank is equal to the depth of the water bath, and the bottom of the heating tank is fixedly connected to the water bath by bolts.

[0010] Preferably, a heater is fixedly connected to the outer surface of the water bath, and an output end of the heater is located inside the water bath.

[0011] Preferably, a motor is fixedly connected to the top surface of the heating tank, and a stirring member is fixedly connected to the output end of the motor, and the stirring member is located inside the heating tank.

[0012] Preferably, a fourth water pump is provided on the feed pipe between the first reaction tank and the second reaction tank, and electromagnetic valves are provided on the two diversion pipes and the output end of the first water pump.

[0013] Preferably, there are a plurality of heat-conducting fins, and the heat-conducting fins are linearly distributed. The thickness of the first heat exchange plate and the second heat exchange plate are both equal to the spacing between the heat-conducting fins.

[0014] Preferably, a connecting pin is fixedly connected to one side of the first heat exchange plate, and a connecting hole is opened on one side of the second heat exchange plate, and the connecting pin is slidably connected to the second heat exchange plate through the connecting hole.

[0015] Preferably, the input end of the second water pump is fixedly connected to a water pumping pipe, the input end of the third water pump is fixedly connected to a drainage pipe, the port of the water pumping pipe is located at the bottom of the water bath, and the port of the drainage pipe is located at the top of the water bath.

[0016] The present invention also proposes a multi-stage dehydrogenation method for organic liquid hydrogen storage, comprising the following steps:

[0017] Step 1: Inject the organic hydrogen storage liquid from the feed pipe on the top of the heating tank, then turn on the heater to heat the circulating liquid inside the water bath, and heat the material inside the heating tank through a water bath.

[0018] Step 2: During the heating of the material, the motor can be turned on to drive the stirring element to rotate, and the material can be stirred by the stirring element.

[0019] Step 3: The heated material is input into the first reaction tank through the first water pump, and an appropriate amount of catalyst is released into the first reaction tank through the catalyst releaser inside the first reaction tank, and a preliminary dehydrogenation reaction is carried out under the action of the catalyst.

[0020] Step 4: The material after the primary reaction is pumped into the second reaction tank through the fourth water pump, and a secondary dehydrogenation reaction is performed in the second reaction tank.

[0021] Step 5: The first reaction tank and the second reaction tank will generate heat during the dehydrogenation operation. The heat can be transferred to the first heat exchange plate and the second heat exchange plate through the heat-conducting fins, and the circulating liquid inside the first annular water tank and the second annular water tank can be heated. The circulating liquid inside the first annular water tank and the second annular water tank can be pumped into the water bath through the third water pump.

[0022] Step 6: Use the second water pump to pump the circulating liquid inside the water bath back into the first annular water tank and the second annular water tank for circulation.

[0023] (3) Beneficial effects

[0024] Compared with the prior art, the present invention provides a multi-stage dehydrogenation device and method for storing hydrogen in organic liquid, which has the following beneficial effects:

[0025] The multi-stage dehydrogenation device and method for organic liquid hydrogen storage injects organic hydrogen storage liquid from a feed pipe at the top of a heating tank, then turns on a heater to heat the circulating liquid inside a water bath, and heats the material inside the heating tank by means of a water bath. During the heating of the material, a motor can be turned on to drive a stirring element to rotate, and the material is stirred by the stirring element. The material can be heated uniformly by the heating method of the water bath and the stirring of the stirring element. The first reaction tank and the second reaction tank generate heat during the dehydrogenation operation, and the heat can be transferred to the first heat exchange plate and the second heat exchange plate through heat-conducting fins, so as to heat the circulating liquid inside the first annular water tank and the second annular water tank. The circulating liquid inside the first annular water tank and the second annular water tank can be pumped into the water bath by a third water pump, and the heat released by the first reaction tank and the second reaction tank can be utilized, thereby increasing the starting temperature of the circulating liquid and reducing the heating time of the heater, thereby achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the assembly of the present invention from a first perspective;

[0027] Figure 2 A schematic structural diagram of the assembly of the present invention from a second perspective;

[0028] Figure 3 It is a structural schematic diagram of the reaction tank of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the water bath of the present invention;

[0030] Figure 5 Schematic diagram of the cross-sectional structure of the water bath of the present invention;

[0031] Figure 6 This is a schematic structural diagram of the first annular water tank of the present invention;

[0032] Figure 7 It is a structural schematic diagram of the second annular water tank of the present invention.

[0033] In the figure: 1-first reaction tank, 2-second reaction tank, 3-heating tank, 4-first water pump, 5-feeding pipe, 6-diverter pipe, 7-water bath, 8-heat conducting fins, 9-first heat exchange plate, 10-second heat exchange plate, 11-first annular water tank, 12-second annular water tank, 13-second water pump, 14-third water pump, 15-heater, 16-motor, 17-stirring element, 18-fourth water pump, 19-electromagnetic valve, 20-connecting pin, 21-connecting hole, 22-water pump, 23-drain pipe. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] See also Figure 1-7 A multi-stage dehydrogenation device for storing hydrogen in an organic liquid is characterized in that it includes a first reaction tank 1, a second reaction tank 2 and a heating tank 3. The bottom of the heating tank 3 is connected to a first water pump 4 through a pipeline. The output end of the first water pump 4 is fixedly connected to a feed pipe 5. The top of the feed pipe 5 is fixedly connected to two branch pipes 6. The two branch pipes 6 are respectively connected to the first reaction tank 1 and the second reaction tank 2. A water bath 7 is provided on the outside of the heating tank 3. The outer surfaces of the first reaction tank 1 and the second reaction tank 2 are fixedly connected to heat-conducting fins 8. One side of the heat-conducting fins 8 is slidably connected to a first heat exchange plate 9. A first annular water tank 11 is fixedly connected to the second heat exchange plate 10 and one side of the first heat exchange plate 9. A second annular water tank 12 is fixedly connected to one side of the second heat exchange plate 10. The first annular water tank 11 and the second annular water tank 12 are fixedly connected to the first reaction tank 1 and the second reaction tank 2 by bolts. A second water pump 13 and a third water pump 14 are fixedly connected to the top of the water bath 7. The second water pump 13 is connected to the top of the first annular water tank 11 and the second annular water tank 12 through a tee pipe. The third water pump 14 is connected to the bottom of the first annular water tank 11 and the second annular water tank 12 through a tee pipe.

[0036] In a preferred embodiment: the first reaction tank 1 and the second reaction tank 2 are arranged in parallel, and a catalyst releaser is provided inside the first reaction tank 1 and the second reaction tank 2. Through the arrangement of the two reaction tanks, the organic hydrogen storage liquid can be subjected to multi-stage dehydrogenation to achieve staged dehydrogenation, thereby achieving efficient separation of hydrogen and efficient recovery of organic liquid.

[0037] In a preferred embodiment, the height of the heating tank 3 is equal to the depth of the water bath 7, and the bottom of the heating tank 3 is fixedly connected to the water bath 7 by bolts. Water bath heating can heat the reaction system evenly, thereby ensuring a more stable reaction.

[0038] In a preferred embodiment: the top surface of the heating tank 3 is fixedly connected to a motor 16, and the output end of the motor 16 is fixedly connected to a stirring member 17, and the stirring member 17 is located inside the heating tank 3. During the heating of the material, the motor 16 can be turned on, and the stirring member 17 is driven by the motor 16 to rotate, and the material is stirred by the stirring member 17. The stirring can make the medium in the heating process receive uniform heat transfer, thereby avoiding local overheating or uneven heating.

[0039] In a preferred embodiment: a fourth water pump 18 is provided on the feed pipe 5 between the first reaction tank 1 and the second reaction tank 2, and an electromagnetic valve 19 is provided on the two branch pipes 6 and the output end of the first water pump 4. The setting of multiple electromagnetic valves can facilitate the control of the material delivery direction.

[0040] In a preferred embodiment, the number of heat-conducting fins 8 is several, and the heat-conducting fins 8 are linearly distributed. The thickness of the first heat exchange plate 9 and the second heat exchange plate 10 are equal to the spacing between the heat-conducting fins 8. Heat can be transferred to the first heat exchange plate 9 and the second heat exchange plate 10 through the heat-conducting fins 8, and the circulating fluid inside the first annular water tank 11 and the second annular water tank 12 can be heated, thereby realizing waste heat utilization.

[0041] In a preferred embodiment: a connecting pin 20 is fixedly connected to one side of the first heat exchange plate 9, and a connecting hole 21 is opened on one side of the second heat exchange plate 10. The connecting pin 20 is slidably connected to the second heat exchange plate 10 through the connecting hole 21. The snap-fit ​​between the connecting pin 20 and the connecting hole 21 can make the connection between the first annular water tank 11 and the second annular water tank 12 more secure.

[0042] In a preferred embodiment: the input end of the second water pump 13 is fixedly connected to a water pumping pipe 22, the input end of the third water pump 14 is fixedly connected to a drain pipe 23, the port of the water pumping pipe 22 is located at the bottom of the water bath 7, and the port of the drain pipe 23 is located at the top of the water bath 7. The second water pump 13 draws the circulating liquid inside the water bath 7 back into the first annular water tank 11 and the second annular water tank 12 for circulation, thereby realizing the recycling of the circulating liquid.

[0043] The working process of the multi-stage dehydrogenation device for organic liquid hydrogen storage includes the following steps:

[0044] Step 1: Inject the organic hydrogen storage liquid from the feed pipe on the top of the heating tank 3, then turn on the heater 15 to heat the circulating liquid inside the water bath 7, and heat the material inside the heating tank 3 by means of a water bath.

[0045] Step 2: During the heating of the material, the motor 16 can be turned on to drive the stirring element 17 to rotate, and the stirring element 17 can be used to stir the material.

[0046] Step 3: The heated material is input into the first reaction tank 1 through the first water pump 4, and an appropriate amount of catalyst is released into the first reaction tank 1 through the catalyst releaser inside the first reaction tank 1, and a preliminary dehydrogenation reaction is carried out under the action of the catalyst.

[0047] Step 4: The material after the primary reaction is pumped into the second reaction tank 2 by the fourth water pump 18 , and a secondary dehydrogenation reaction is performed in the second reaction tank 2 .

[0048] Step 5: The first reaction tank 1 and the second reaction tank 2 generate heat during the dehydrogenation operation. The heat can be transferred to the first heat exchange plate 9 and the second heat exchange plate 10 through the heat-conducting fins 8, and the circulating liquid inside the first annular water tank 11 and the second annular water tank 12 can be heated. The circulating liquid inside the first annular water tank 11 and the second annular water tank 12 can be pumped into the water bath 7 through the third water pump 14.

[0049] Step 6: The circulating liquid in the water bath 7 is pumped back into the first annular water tank 11 and the second annular water tank 12 by the second water pump 13 for circulation.

[0050] The electrical components mentioned in this article are all connected to an external main controller and 220V AC power, and the main controller can be a conventional known device that performs control such as a computer.

[0051] In summary, the multi-stage dehydrogenation device and method for organic liquid hydrogen storage is to inject the organic hydrogen storage liquid from the feed pipe at the top of the heating tank 3, and then turn on the heater 15 to heat the circulating liquid inside the water bath 7, and heat the material inside the heating tank 3 by means of a water bath. During the heating of the material, the motor 16 can be turned on, and the stirring member 17 can be driven by the motor 16 to rotate, and the material can be stirred by the stirring member 17. The material can be evenly heated by the heating method of the water bath and the stirring of the stirring member. The first reaction tank 1 and the second reaction tank 1 are heated by the stirring member. Tank 2 generates heat during the dehydrogenation operation, and the heat can be transferred to the first heat exchange plate 9 and the second heat exchange plate 10 through the heat-conducting fins 8, so as to heat the circulating fluid inside the first annular water tank 11 and the second annular water tank 12. The circulating fluid inside the first annular water tank 11 and the second annular water tank 12 can be pumped into the water bath 7 through the third water pump 14, so that the heat released by the first reaction tank 1 and the second reaction tank 2 can be utilized, thereby increasing the starting temperature of the circulating fluid and reducing the heating time of the heater 15, thereby achieving the purpose of energy saving.

[0052] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0053] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage dehydrogenation device for storing hydrogen in an organic liquid, characterized in that: It comprises a first reaction tank, a second reaction tank and a heating tank, wherein the bottom of the heating tank is connected to a first water pump through a pipeline, the output end of the first water pump is fixedly connected to a feed pipe, the top of the feed pipe is fixedly connected to two shunt pipes, the two shunt pipes are respectively connected to the first reaction tank and the second reaction tank, and a water bath is arranged outside the heating tank; The outer surfaces of the first reaction tank and the second reaction tank are fixedly connected with heat-conducting fins, one side of the heat-conducting fins is slidably connected with the first heat exchange plate and the second heat exchange plate, one side of the first heat exchange plate is fixedly connected with the first annular water tank, one side of the second heat exchange plate is fixedly connected with the second annular water tank, and the first annular water tank and the second annular water tank are fixedly connected with the first reaction tank and the second reaction tank by bolts; The top of the water bath is fixedly connected with a second water pump and a third water pump. The second water pump is connected to the top of the first annular water tank and the second annular water tank through a three-way pipe. The third water pump is connected to the bottom of the first annular water tank and the second annular water tank through a three-way pipe.

2. A multi-stage dehydrogenation device for storing hydrogen in organic liquid according to claim 1, characterized in that: The first reaction tank and the second reaction tank are arranged in parallel, and catalyst releasers are arranged inside the first reaction tank and the second reaction tank.

3. A multi-stage dehydrogenation device for storing hydrogen in organic liquid according to claim 1, characterized in that: The height of the heating tank is equal to the depth of the water bath, and the bottom of the heating tank is fixedly connected to the water bath by bolts.

4. A multi-stage dehydrogenation device for storing hydrogen in organic liquid according to claim 1, characterized in that: A heater is fixedly connected to the outer surface of the water bath, and an output end of the heater is located inside the water bath.

5. A multi-stage dehydrogenation device for storing hydrogen in organic liquid according to claim 1, characterized in that: A motor is fixedly connected to the top surface of the heating tank, and a stirring member is fixedly connected to the output end of the motor. The stirring member is located inside the heating tank.

6. A multi-stage dehydrogenation device for storing hydrogen in organic liquid according to claim 1, characterized in that: A fourth water pump is arranged on the feed pipe between the first reaction tank and the second reaction tank, and electromagnetic valves are arranged on the two branch pipes and the output end of the first water pump.

7. A multi-stage dehydrogenation device for storing hydrogen in organic liquid according to claim 1, characterized in that: The number of the heat-conducting fins is several, and the heat-conducting fins are linearly distributed. The thickness of the first heat exchange plate and the second heat exchange plate are both equal to the spacing between the heat-conducting fins.

8. A multi-stage dehydrogenation device for storing hydrogen in organic liquid according to claim 1, characterized in that: A connecting pin is fixedly connected to one side of the first heat exchange plate, and a connecting hole is opened on one side of the second heat exchange plate. The connecting pin is slidably connected to the second heat exchange plate through the connecting hole.

9. The multi-stage dehydrogenation device for organic liquid hydrogen storage according to claim 1, characterized in that: The input end of the second water pump is fixedly connected with a water pumping pipe, the input end of the third water pump is fixedly connected with a drainage pipe, the port of the water pumping pipe is located at the bottom of the water bath, and the port of the drainage pipe is located at the top of the water bath.

10. A multi-stage dehydrogenation method for hydrogen storage in organic liquid, characterized in that: The steps include: Step 1: inject the organic hydrogen storage liquid from the feed pipe on the top of the heating tank, then turn on the heater to heat the circulating liquid inside the water bath, and heat the material inside the heating tank by means of a water bath; Step 2: During the heating process of the material, the motor can be turned on to drive the stirring element to rotate, and the material can be stirred by the stirring element; Step 3: The heated material is input into the first reaction tank through the first water pump, and a proper amount of catalyst is released into the first reaction tank through the catalyst releaser inside the first reaction tank, and a preliminary dehydrogenation reaction is carried out under the action of the catalyst; Step 4: pumping the material after the primary reaction into the second reaction tank through the fourth water pump, and performing a secondary dehydrogenation reaction in the second reaction tank; Step 5: The first reaction tank and the second reaction tank generate heat during the dehydrogenation operation, and the heat can be transferred to the first heat exchange plate and the second heat exchange plate through the heat conducting fins, so as to heat the circulating liquid inside the first annular water tank and the second annular water tank, and the circulating liquid inside the first annular water tank and the second annular water tank can be pumped into the water bath through the third water pump; Step 6: The circulating liquid in the water bath is pumped back into the first annular water tank and the second annular water tank through the second water pump for circulation.

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