Power generation and gas supply system comprising microwave heating ammonia decomposition hydrogen production device

Abstract

The invention discloses a power generation and gas supply system containing a microwave heating ammonia decomposition hydrogen production device, which comprises an ammonia tank, an ammonia decomposition hydrogen production device, a water circulation mechanism, a gas production mechanism and a power generation mechanism, and the ammonia tank is communicated with the ammonia decomposition hydrogen production device; the water circulation mechanism comprises a water tank, a first heat exchanger and a plurality of water coolers which are circularly communicated; the decomposed gas outlet is sequentially communicated with the first heat exchanger and the water coolers; the water cooler is connected with the power generation mechanism; the gas production mechanism comprises a compressor, a first buffer tank, a second buffer tank and a first pressure swing adsorption device; the compressor is connected with the first buffer tank in series, and the first buffer tank is connected with the first pressure swing adsorption device; the first pressure swing adsorption device comprises a first molecular sieve and a second molecular sieve which are arranged in parallel, and a plurality of nitrogen valves are arranged between the first molecular sieve and the second molecular sieve. According to the power generation and gas supply system containing microwave heating ammonia decomposition hydrogen production, organic combination of ammonia decomposition hydrogen production and power generation and oxygen and nitrogen production is achieved, and energy consumption in the operation process of the whole system is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of ammonia decomposition equipment, and particularly relates to a power generation and gas supply system containing a microwave heating ammonia decomposition hydrogen production device that uses microwave heating to promote ammonia decomposition. Background Art

[0002] With the continuous growth of global energy demand and the increasing awareness of environmental protection, the development of efficient and environmentally friendly new energy power generation technologies has become a hot topic in current scientific research; ammonia, as a potential hydrogen energy carrier, has the advantages of wide sources, convenient storage and transportation, etc., so ammonia decomposition hydrogen production technology has received extensive attention; however, traditional ammonia decomposition hydrogen production methods usually have problems such as high energy consumption, low reaction efficiency, and complex equipment, which limit their large-scale application; in addition, with the continuous increase in the demand for oxygen in medical, industrial and other fields, oxygen separation technology has also developed rapidly; however, existing oxygen separation methods often have problems such as high energy consumption and low separation efficiency, and it is difficult to meet the large-scale, efficient, and low-cost oxygen supply demand; in some cases where oxygen or nitrogen is required and power supply is also required, it is difficult to balance the gas supply and power supply at both ends.

[0003] Chinese Patent CN118738448A discloses a cold row power supply balance system for an ammonia decomposition hydrogen production device, including an ammonia supply mechanism, an ammonia decomposition reactor, a first water cooler, a purification device, a fuel cell and a water tank; the ammonia supply mechanism is used to provide ammonia; the ammonia decomposition reactor includes a plurality of flue gas pipes and a plurality of ammonia pipes, and each flue gas pipe is fixed with a plurality of ammonia pipes, and the plurality of flue gas pipes are connected to each other; there is a gap between the plurality of ammonia pipes and the corresponding flue gas pipes; the ammonia pipe communicates with the first water cooler; the first water cooler communicates with the purification device, and the purification device communicates with the fuel inlet of the fuel cell; the outlet end of the fuel cell communicates with the cooler; the cooler also communicates with the flue gas pipe, the purification device and the second water cooler respectively; the second water cooler and the water tank form a closed loop; this cold row power supply balance system reduces heat by exchanging heat between high-temperature flue gas and ammonia through the setting of an evaporator and a plurality of water coolers, realizes the separation and recycling of liquid water, and improves the water cycle utilization rate and effective temperature control; however, while improving the water cycle rate, this system is difficult to effectively utilize and balance the distribution of energy, and it is impossible to simultaneously and effectively carry out power generation and oxygen production when combined with an oxygen separation system. Summary of the Invention

[0004] In view of the defects in the existing oxygen separation system and ammonia decomposition system, such as high energy consumption, low system operation efficiency, and difficulty in effectively coupling the two, making it difficult to synchronously and effectively carry out oxygen production and power supply; a power generation and gas supply system containing a microwave-heated ammonia decomposition hydrogen production device is provided, which can reduce energy consumption while improving the system operation efficiency, realize the synchronous and efficient operation of oxygen production and power supply, and can effectively utilize and balance the distribution of energy.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a power generation and gas supply system containing microwave-heated ammonia decomposition hydrogen production, including an ammonia tank, an ammonia decomposition hydrogen production device, a water circulation mechanism, an oxygen production mechanism, and a power generation mechanism. The ammonia tank is connected to the ammonia gas inlet of the ammonia decomposition hydrogen production device; the ammonia decomposition hydrogen production device includes a microwave heating part and a decomposition part. The upper end of the decomposition part is connected to the ammonia gas inlet and the decomposition gas outlet; the decomposition part is located inside the microwave heating part; the water circulation mechanism includes a water tank, a first heat exchanger, a first water cooler, and a second water cooler. The water tank is interconnected with the first water cooler; the water tank is interconnected with the second water cooler; the decomposition gas outlet is sequentially connected to the first heat exchanger and the first water cooler; the liquid water in the water tank can circulate between the first water cooler and the second water cooler; the first water cooler is connected to the power generation mechanism; the gas production mechanism includes a compressor, a first buffer tank, a second buffer tank, and a first pressure swing adsorption device; the compressor is connected in series with the first buffer tank, and the first buffer tank is then connected to the first pressure swing adsorption device; the first pressure swing adsorption device includes a first molecular sieve and a second molecular sieve arranged in parallel. The outlet of the first molecular sieve is connected to the outlet of the second molecular sieve. Multiple nitrogen valves are arranged between the outlet of the first molecular sieve and the outlet of the second molecular sieve; the inlet of the first molecular sieve is connected to the inlet of the second molecular sieve. Multiple nitrogen valves are arranged between the inlet of the first molecular sieve and the inlet of the second molecular sieve; the outlet of the first molecular sieve is also connected to the inlet of the second molecular sieve. Multiple nitrogen valves are arranged between the outlet of the first molecular sieve and the inlet of the second molecular sieve; the outlet of the second molecular sieve is also connected to the inlet of the first molecular sieve. Multiple nitrogen valves are arranged between the outlet of the second molecular sieve and the inlet of the first molecular sieve.

[0006] Further, the ammonia decomposition hydrogen production device includes a microwave heating part and a decomposition part. The microwave heating part is of a hollow structure. The decomposition part is located at the exact center inside the microwave heating part. There is a gap between the outer wall of the decomposition part and the inner wall of the microwave heating part; a ceramic block is provided between the bottom of the decomposition part and the microwave heating part; the decomposition part is made of ceramic material.

[0007] Further, a solid pipeline is provided in the decomposition body of the decomposition part. A plurality of catalytic pipelines are provided in the solid pipeline, and both ends of the catalytic pipelines respectively penetrate through the upper surface and the lower surface of the solid pipeline; the plurality of catalytic pipelines are arranged at intervals from each other; a first baffle and a second baffle are fixed on the upper surface of the solid pipeline, the first baffle and the second baffle are arranged perpendicular to each other, and both the first baffle and the second baffle are fixedly connected to the top surface of the decomposition body at the same time; a third baffle is vertically fixed on the bottom surface of the decomposition body, and the third baffle is also fixedly connected to the bottom surface of the decomposition body at the same time; the first baffle and the second baffle divide the upper surface of the solid pipeline into a first surface, a second surface and a third surface, and the third baffle divides the lower surface of the solid pipeline into a fourth surface and a fifth surface; the first surface, the first baffle, the second baffle and the top surface of the decomposition body together form a first interval; the fourth surface, the third baffle and the bottom surface of the decomposition body together form a second interval; the third surface, the first baffle and the top surface of the decomposition body together form a third interval; the fifth surface, the third baffle and the bottom surface of the decomposition body together form a fourth interval; the second surface, the second baffle, the first baffle and the top surface of the decomposition body together form a fifth interval; the first interval and the second interval are communicated through a plurality of catalytic pipelines, the second interval and the third interval are communicated through a plurality of catalytic pipelines, the third interval and the fourth interval are communicated through a plurality of catalytic pipelines, and the fourth interval and the fifth interval are communicated through a plurality of catalytic pipelines.

[0008] Further, the first baffle is located at the horizontal center line position of the upper surface of the solid pipeline, the second baffle is located at the vertical center line position of the upper surface of the solid pipeline, and the third baffle is located at the vertical center position of the lower surface of the solid pipeline; an ammonia decomposition catalyst is filled in the catalytic pipeline.

[0009] Further, the power generation mechanism includes a purification device, a fuel cell, a storage battery and a power conversion module; the purification device is connected to the fuel cell, the fuel cell is connected to the storage battery, the storage battery is then connected to the power conversion module, and the purification device is connected to the first water cooler.

[0010] Further, the purification device and the first water cooler are connected through a pipeline, and a first heater is arranged in parallel on the pipeline between the purification device and the first water cooler; the first heat exchanger is connected to the outlets of the first molecular sieve and the second molecular sieve, and the first heat exchanger is then connected to the purification device.

[0011] Further, the water circulation mechanism further includes an evaporator, the evaporator is arranged between the ammonia tank and the ammonia decomposition hydrogen production device and is respectively connected to the ammonia tank and the hydrogen inlet of the ammonia decomposition hydrogen production device; the evaporator is also connected to the water tank and the second water cooler; the compressor is connected to the second water cooler.

[0012] Furthermore, the inlet of the first molecular sieve is connected to the inlet of the second molecular sieve through a first pipeline and a second pipeline arranged in parallel; a first nitrogen valve and a second nitrogen valve are arranged in series on the first pipeline, a third nitrogen valve and a fourth nitrogen valve are arranged in series on the second pipeline, the first nitrogen valve and the third nitrogen valve are arranged close to the inlet of the first molecular sieve, and the second nitrogen valve and the fourth nitrogen valve are arranged close to the inlet of the second molecular sieve; the inlet of the first molecular sieve is connected to the inlet of the second molecular sieve through a third pipeline and a fourth pipeline arranged in parallel; a tenth nitrogen valve is arranged on the third pipeline, an eleventh nitrogen valve and a twelfth nitrogen valve are arranged in series on the fourth pipeline, the eleventh nitrogen valve is arranged close to the first molecular sieve, and the twelfth nitrogen valve is arranged close to the second molecular sieve; the outlet of the first molecular sieve is connected to the inlet of the second molecular sieve through a fifth pipeline, and a sixth nitrogen valve, a seventh nitrogen valve and an eighth nitrogen valve are sequentially arranged on the fifth pipeline, the sixth nitrogen valve is arranged close to the inlet of the second molecular sieve, and the eighth nitrogen valve is arranged close to the outlet of the first molecular sieve; the outlet of the second molecular sieve is connected to the inlet of the first molecular sieve through a sixth pipeline, the sixth pipeline intersects with the fifth pipeline and is connected through the seventh nitrogen valve on the fifth pipeline; a fifth nitrogen valve and a ninth nitrogen valve are further arranged on the sixth pipeline, the fifth nitrogen valve is arranged close to the first molecular sieve, and carbon molecular sieves are filled in both the first molecular sieve and the second molecular sieve.

[0013] Furthermore, a second pressure swing adsorption device is further included, the second pressure swing adsorption device includes a third molecular sieve and a fourth molecular sieve arranged in parallel, the outlet of the third molecular sieve is connected to the outlet of the fourth molecular sieve, and a plurality of oxygen valves are arranged between the outlet of the third molecular sieve and the outlet of the fourth molecular sieve; the inlet of the third molecular sieve is connected to the inlet of the fourth molecular sieve, and a plurality of oxygen valves are arranged between the inlet of the third molecular sieve and the inlet of the fourth molecular sieve; the outlet of the third molecular sieve is further connected to the inlet of the fourth molecular sieve, and a plurality of oxygen valves are arranged between the outlet of the third molecular sieve and the inlet of the fourth molecular sieve; the outlet of the fourth molecular sieve is further connected to the inlet of the third molecular sieve, and a plurality of oxygen valves are arranged between the outlet of the fourth molecular sieve and the inlet of the third molecular sieve.

[0014] Furthermore, zeolite molecular sieves are filled in both the third molecular sieve and the fourth molecular sieve; the outlets of the third molecular sieve and the fourth molecular sieve are simultaneously connected to a third buffer tank.

[0015] A power generation and gas supply system with a microwave heating ammonia decomposition hydrogen production device according to the present invention uses an ammonia decomposition hydrogen production device made of ceramic materials with microwave heating. By combining multiple catalytic pipelines and the setting of baffles at different positions, ammonia flows back and forth up and down in multiple catalytic pipelines in the decomposition part, increasing the flow distance of ammonia while constantly oscillating and rubbing, enabling more complete heating and decomposition, greatly improving the decomposition efficiency of ammonia and the heat exchange effect of the device. At the same time, by combining a water tank, a first water cooler, a second water cooler, and an evaporator that are interconnected and circulated, the heat generated during the operation of the system can be transferred between multiple components through the flow of liquid water, meeting the temperature requirements for the operation of each component, as well as the recycling and reuse of liquid water and heat. In the gas production mechanism, by using molecular sieves arranged in parallel and connecting the outlets and inlets of the molecular sieves arranged in parallel, the molecular sieves arranged in parallel can be used alternately in a cycle, and the generated gas is fully and effectively utilized during use, achieving on-line adsorption and desorption of the molecular sieve while also protecting the molecular sieve, improving the efficiency of gas separation from the air in the system and the energy utilization rate during the operation of the system. It realizes the organic combination of ammonia decomposition hydrogen production power generation and air liquefaction separation for oxygen and nitrogen production, reduces the energy consumption and temperature balance during the operation of the overall system, and is beneficial to the stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the specific embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a power generation and gas supply system with a microwave heating ammonia decomposition hydrogen production device according to the present invention;

[0018] Figure 2 It is a schematic structural diagram of an ammonia decomposition hydrogen production device of a power generation and gas supply system with a microwave heating ammonia decomposition hydrogen production device according to the present invention;

[0019] Figure 3 It is a schematic structural diagram of the decomposition part of an ammonia decomposition hydrogen production device of a power generation and gas supply system with a microwave heating ammonia decomposition hydrogen production device according to the present invention;

[0020] Figure 4 It is a schematic internal structural diagram of the decomposition part of an ammonia decomposition hydrogen production device of a power generation and gas supply system with a microwave heating ammonia decomposition hydrogen production device according to the present invention;

[0021] Figure 5Top view of the decomposition part of the ammonia decomposition hydrogen production device in a power generation and gas supply system containing a microwave heating ammonia decomposition hydrogen production device according to the present invention;

[0022] Figure 6 Bottom view of the decomposition part of the ammonia decomposition hydrogen production device in a power generation and gas supply system containing a microwave heating ammonia decomposition hydrogen production device according to the present invention;

[0023] Figure 7 Schematic diagram of gas flow in the decomposition part of the ammonia decomposition hydrogen production device in a power generation and gas supply system containing a microwave heating ammonia decomposition hydrogen production device according to the present invention. Specific embodiments

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figures 1 to 7 shown, a power generation and gas supply system containing microwave heating ammonia decomposition hydrogen production according to the present invention includes an ammonia tank 1, an ammonia decomposition hydrogen production device 2, a water circulation mechanism 3, a gas production mechanism 4, and a power generation mechanism 5;

[0026] The ammonia tank 1 is communicated with the ammonia gas inlet 221 of the ammonia decomposition hydrogen production device 2; the ammonia decomposition hydrogen production device 2 includes a microwave heating part 21 and a decomposition part 22, and the upper end of the decomposition part 22 is communicated with the ammonia gas inlet 221 and the decomposed gas outlet 222; the decomposition part 22 is located inside the microwave heating part 21;

[0027] The water circulation mechanism 3 includes a water tank 31, a first heat exchanger 32, a first water cooler 33, and a second water cooler 34. The water tank 31 is communicated with the first water cooler 33; the water tank 31 is communicated with the second water cooler 34; the decomposed gas outlet 22 is sequentially communicated with the first heat exchanger 32 and the first water cooler 33; the liquid water in the water tank 31 can circulate between the first water cooler 33 and the second water cooler 34; the first water cooler 33 is connected to the power generation mechanism 5;

[0028] The gas generation mechanism 4 includes a compressor 41, a first buffer tank 42, a second buffer tank 43, and a first pressure swing adsorption device 45. The compressor 41 is connected in series with the first buffer tank 42, and the first buffer tank 42 is further connected to the first pressure swing adsorption device 45. The first pressure swing adsorption device 45 includes a first molecular sieve A45 and a second molecular sieve B45 arranged in parallel. The outlet of the first molecular sieve A45 is connected to the outlet of the second molecular sieve B45, and a plurality of nitrogen valves are arranged between the outlet of the first molecular sieve A45 and the outlet of the second molecular sieve B45. The inlet of the first molecular sieve A45 is connected to the inlet of the second molecular sieve B45, and a plurality of nitrogen valves are arranged between the inlet of the first molecular sieve A45 and the inlet of the second molecular sieve B45. The outlet of the first molecular sieve A45 is further connected to the inlet of the second molecular sieve B45, and a plurality of nitrogen valves are arranged between the outlet of the first molecular sieve A45 and the inlet of the second molecular sieve B45. The outlet of the second molecular sieve B45 is further connected to the inlet of the first molecular sieve A45, and a plurality of nitrogen valves are arranged between the outlet of the second molecular sieve B45 and the inlet of the first molecular sieve A45.

[0029] As Figures 3 to 7 shown, the ammonia decomposition hydrogen production device 2 includes a microwave heating part 21 and a decomposition part 22. The microwave heating part 21 is a hollow cylindrical structure, and the decomposition part 22 is arranged inside the microwave heating part 21, and there is a gap between the outer wall of the decomposition part 22 and the inner wall of the microwave heating part 21. The microwave heating part 21 is connected to an external power supply and can generate microwaves inside, converting external electrical energy into microwave energy to heat the inside. Preferably, in order to heat each part of the decomposition part 22 sufficiently and evenly, the decomposition part 22 is located at the exact center inside the microwave heating part 21, the shape of the decomposition part 22 corresponds to the shape of the microwave heating part 21, and a ceramic block (not shown) is arranged between the bottom of the decomposition part 22 and the microwave heating part 21. The ceramic block is used to support the decomposition part 22 so that the decomposition part 22 is located at the exact center inside the microwave heating part 21, and thus during the power-on heating process, each part of the decomposition part 22 can be heated sufficiently and evenly, which is beneficial to improving the heating effect on ammonia.

[0030] As Figure 4 and Figure 5As shown, the decomposition part 22 is of a cylindrical structure. A solid pipeline 223 is provided in the decomposition body 220 of the decomposition part 22. The solid pipeline 223 is of a solid structure. A plurality of catalytic pipelines 225 are provided in the solid pipeline 223. The two ends of the catalytic pipeline 225 correspondingly pass through the upper surface and the lower surface of the solid pipeline 223. The installation direction of the catalytic pipeline 225 is parallel to the installation direction of the solid pipeline 223. The plurality of catalytic pipelines 225 are spaced apart from each other. The plurality of catalytic pipelines 225 are parallel to each other and evenly arranged inside the solid pipeline 223. Among them, a first baffle 2241 and a second baffle 2242 are vertically fixed on the upper surface of the solid pipeline 223. The first baffle 2241 and the second baffle 2242 are perpendicular to each other. Both the first baffle 2241 and the second baffle 2242 are fixedly connected to the top surface of the decomposition body 220 at the same time. As Figure 6 shown, the first baffle 2241 and the second baffle 2242 divide the upper surface of the solid pipeline 223 into a first surface A1, a second surface A2, and a third surface A3. A plurality of the catalytic pipelines 225 are distributed on the first surface A1. A plurality of the catalytic pipelines 225 are distributed on the second surface A2. A plurality of the catalytic pipelines 225 are distributed on the third surface A3. More preferably, the first baffle 2241 is located at the horizontal center line position of the upper surface of the solid pipeline 223, and the second baffle 2242 is located at the vertical center line position of the upper surface of the solid pipeline 223.

[0031] Similarly, as Figure 7 shown, a third baffle 2243 is vertically fixed on the bottom surface of the decomposition body 220. The third baffle 2243 is also fixedly connected to the bottom surface of the decomposition body 220 at the same time. The third baffle 2243 divides the lower surface of the solid pipeline 223 into a fourth surface B1 and a fifth surface B2. A plurality of the catalytic pipelines 225 are evenly distributed on the fourth surface B1. A plurality of the catalytic pipelines 225 are evenly distributed on the fifth surface B2. More preferably, the third baffle 2243 is located at the vertical center position of the lower surface of the solid pipeline 223.

[0032] The first surface A1, the first baffle 2241, the second baffle 2242 and the top surface of the decomposition body 220 together form a first interval; the fourth surface B1, the third baffle 2243 and the bottom surface of the decomposition body 220 together form a second interval; the third surface A3, the first baffle 2241 and the top surface of the decomposition body 220 together form a third interval; the fifth surface B2, the third baffle 2243 and the bottom surface of the decomposition body 220 together form a fourth interval; the second surface A2, the second baffle 2242, the first baffle 2241 and the top surface of the decomposition body 220 together form a fifth interval; multiple ones of the catalytic pipelines 225 in the first interval are also communicated with the second interval, some of the catalytic pipelines 225 in the second interval are the same as the catalytic pipelines 225 in the first interval, and some of the catalytic pipelines 225 in the second interval are communicated with the third interval; some of the catalytic pipelines 225 in the third interval are the same as the catalytic pipelines 225 in the second interval, some of the catalytic pipelines 225 in the third interval are communicated with the fourth interval, some of the catalytic pipelines 225 in the fourth interval are the same as the catalytic pipelines 225 in the third interval, and some of the catalytic pipelines 225 in the fourth interval are communicated with the fifth interval; more specifically, the first interval is communicated with the ammonia inlet 221, and the fifth interval is communicated with the decomposition gas inlet 222.

[0033] After ammonia gas enters the ammonia decomposition hydrogen production device 2 through the ammonia gas inlet 221, the ammonia gas first enters the first section through the ammonia gas inlet 221 and then enters a plurality of the catalytic pipelines 225 on the first surface A1; the gas flows through a plurality of the catalytic pipelines 225 on the first surface A1 and enters the second section, and under the blocking effect of the third baffle 2243, the gas enters a plurality of the catalytic pipelines 225 communicating the second section with the third section and flows into the third section; under the blocking effect of the first baffle 2241, the gas continues to enter the fourth section through a part of the catalytic pipelines 225 communicating the third section with the fourth section; under the blocking effect of the third baffle 2243, the gas enters the fifth section through a plurality of the catalytic pipelines 225 on the fourth section communicating with the fifth section, and finally is discharged from the decomposition part through the decomposition gas inlet 222 communicated with the fifth section; during the gas flow process, ammonia continuously absorbs the heat generated by heating in the microwave heating part 21 and undergoes a decomposition reaction to generate hydrogen and nitrogen; by arranging a plurality of baffles and combining the catalytic pipelines 225 penetrating through the solid pipeline 223, ammonia can flow up and down inside the decomposition part 22, so the flow distance and flow time of the gas are prolonged, and ammonia can fully absorb heat and decompose into hydrogen and nitrogen; moreover, by guiding ammonia through a plurality of the catalytic pipelines 225, the heat exchange effect between the inside of the decomposition part 22 and the microwave heating part 21 is also strengthened, and the heating effect and decomposition effect of ammonia are improved; similarly, the microwave heating 21 heats ammonia in the form of microwaves, and the microwaves directly act on the ammonia in a plurality of the catalytic pipelines 225. Ammonia belongs to polar molecules, and polar molecules will vibrate and rub violently in the microwave field, so as to be heated, achieving the effects of temperature rise and decomposition of ammonia; compared with traditional electric heating and flue gas heating, it has the advantages of good heating effect and high efficiency; more preferably, the whole decomposition part 22 is made of ceramic material or glass material to reduce the damage during the microwave heating process. Compared with the traditional metal material reactor, the heat loss during the heating process is also reduced; the catalytic pipelines 225 are correspondingly filled with ammonia decomposition catalysts, such as ruthenium-based catalysts or nickel-based catalysts, to improve the decomposition rate of ammonia.

[0034] In Figure 1Among them, the ammonia tank 1 is connected to the ammonia inlet 221 of the ammonia decomposition hydrogen production device 2, and the ammonia tank 1 is used to introduce ammonia into the ammonia inlet 221; ammonia is decomposed into a mixed gas of hydrogen and nitrogen in the ammonia decomposition hydrogen production device 2, and the decomposed hydrogen and nitrogen mixed gas is introduced into the first heat exchanger 32 for heat exchange; after heat exchange, the hydrogen and ammonia are discharged from the first heat exchanger 32 and then enter the first water cooler 33; the liquid water in the water tank 31 flows into the first water cooler 33 to cool down the mixed gas discharged from the first heat exchanger 32; after the temperature is reduced, the temperature of the liquid water rises and is discharged from the first water cooler 33 and flows back to the water tank 31; the cooled mixed gas is discharged from the first water cooler 33 and enters the power generation mechanism 5 for power generation; the power generation mechanism 5 includes a purification device 51, a fuel cell 52, a storage battery 53, and a power conversion module 54 connected in series in sequence; the purification device 51 is used to purify and remove the unreacted ammonia remaining in the mixed gas; to be suitable for the operation of the subsequent fuel cell; the fuel cell 52 converts the chemical energy of the gas into electrical energy, and the converted electrical energy is stored and converted in the storage battery 53 and the power conversion module 54 and finally output.

[0035] The water circulation mechanism further includes an evaporator 35, the evaporator 35 is arranged between the ammonia tank 1 and the ammonia decomposition hydrogen production device 2 and is respectively connected to the ammonia tank 1 and the hydrogen inlet 221 of the ammonia decomposition hydrogen production device 2; the evaporator 35 is also connected to the water tank 31 and the second water cooler 34; the liquid water in the water tank 31 can enter the evaporator 35 to provide heat, promote the temperature rise of the liquid ammonia or ammonia introduced from the ammonia tank 1, achieve the heating and evaporation effect of the liquid ammonia, so as to increase the heat of the ammonia entering the ammonia decomposition hydrogen production device, and then improve the decomposition efficiency of the subsequent ammonia decomposition. At the same time, it can also reduce the additional energy consumption of the system and improve the overall energy utilization rate of the system; the liquid water after heating and evaporation is discharged from the water tank 31 and then enters the second water cooler 34, realizing the circulating flow of the liquid water in the water tank 31 and the temperature balance between the first water cooler 33 and the evaporator 35, which is beneficial to the temperature balance of the whole system and the reuse of energy.

[0036] The compressor 41 in the gas generating mechanism 4 is connected to the second water cooler 34. The compressor 41 is used to preliminarily filter and compress air, preliminarily reduce the air pressure and remove impurities therein. The compressed air enters the second water cooler 34. In the second water cooler 34, the evaporated and cooled liquid water introduced from the evaporator 35 cools the air compressed by the compressor 41, reducing the content of saturated water in the air. The saturated water in the air forms condensed water after cooling and separates from the air, achieving the drying effect on the air. The separated condensed water is discharged together with the remaining liquid water in the second water cooler 34 and reflows into the water tank 31, and then enters the first water cooler 33 again for cooling the mixed gas. It achieves the supplementary effect on the liquid water in the water tank 31, and also helps to control the temperature in the water tank 31 and the cooling effect of the first water cooler 33, enabling the liquid water to circulate between the water tank 31, the first water cooler 33, the second water cooler 34 and the evaporator 35, achieving the temperature balance control of each part and the corresponding evaporation and cooling effects, and effectively utilizing the energy generated during the operation of the system. The second water cooler 34 is then connected to the first buffer tank 42. The dried air is discharged from the second water cooler 34 and enters the first buffer tank 42 for buffering, and then enters the first pressure swing adsorption device 45 for pressure swing adsorption to separate nitrogen from the air.

[0037] The first pressure swing adsorption device 45 includes a first molecular sieve A45 and a second molecular sieve B45. The first molecular sieve A45 and the second molecular sieve B45 are arranged in parallel. Specifically, the inlet of the first molecular sieve A45 is connected to the inlet of the second molecular sieve B45, and the inlet of the first molecular sieve A45 and the inlet of the second molecular sieve B45 are connected by a first pipeline and a second pipeline arranged in parallel; a first nitrogen valve N1 and a second nitrogen valve N2 are arranged in series on the first pipeline, a third nitrogen valve N3 and a fourth nitrogen valve N4 are arranged in series on the second pipeline, the first nitrogen valve N1 and the third nitrogen valve N3 are arranged close to the inlet of the first molecular sieve A45, and the second nitrogen valve N2 and the fourth nitrogen valve N4 are arranged close to the inlet of the second molecular sieve B45; the outlet of the first molecular sieve A45 is connected to the outlet of the second molecular sieve B45, and the inlet of the first molecular sieve A45 and the inlet of the second molecular sieve B45 are connected by a third pipeline and a fourth pipeline arranged in parallel; a tenth nitrogen valve N10 is arranged on the third pipeline, an eleventh nitrogen valve N11 and a twelfth nitrogen valve N12 are arranged in series on the fourth pipeline, the eleventh nitrogen valve N11 is arranged close to the first molecular sieve A45, and the twelfth nitrogen valve N12 is arranged close to the second molecular sieve B45; in order to balance the pressure during the adsorption and desorption processes of the two molecular sieves and reduce the gas consumption during the gas separation process; preferably, the outlet of the first molecular sieve A45 and the inlet of the second molecular sieve B45 are connected by a fifth pipeline, and a sixth nitrogen valve N6, a seventh nitrogen valve N7 and an eighth nitrogen valve N8 are successively arranged on the fifth pipeline, the sixth nitrogen valve N6 is arranged close to the inlet of the second molecular sieve B45, and the eighth nitrogen valve N8 is arranged close to the outlet of the first molecular sieve A45; the outlet of the second molecular sieve B45 and the inlet of the first molecular sieve A45 are connected by a sixth pipeline, the sixth pipeline intersects with the fifth pipeline and is connected through the seventh nitrogen valve N7 on the fifth pipeline; a fifth nitrogen valve N5 and a ninth nitrogen valve N9 are also arranged on the sixth pipeline, and the fifth nitrogen valve N5 is arranged close to the first molecular sieve A45; by opening the corresponding nitrogen valves on the corresponding pipelines, the flow direction of the gas between the first molecular sieve A45 and the second molecular sieve B45 is adjusted, and the online switching of adsorption and desorption between the two molecular sieves is realized, so as to improve the nitrogen separation efficiency of the first pressure swing adsorption device 45 and reduce the air consumption of the device.

[0038] The buffered air discharged from the first buffer tank 42 enters the first pipeline of the first pressure swing adsorption device 45. Open the first nitrogen valve N1 and the eleventh nitrogen valve N11 and keep the remaining nitrogen valves closed, so that all the air enters the first molecular sieve A45 for adsorption separation. The separated nitrogen is discharged through the eleventh nitrogen valve N11 above the first molecular sieve A45. When the first molecular sieve A45 is saturated with adsorption, close the first nitrogen valve N1 and the eleventh nitrogen valve N11, open the second nitrogen valve N2 and the twelfth nitrogen valve N12 and keep the remaining nitrogen valves closed, and introduce the air into the second molecular sieve B45 to separate the nitrogen in the air through the second molecular sieve B45. The separated nitrogen is discharged through the twelfth nitrogen valve N12. After operating for a period of time, open the ninth nitrogen valve N9 connected to the outlet of the second molecular sieve B45, the fifth nitrogen valve N5 connected to the inlet of the first molecular sieve A45, and the seventh nitrogen valve N7 located between the ninth nitrogen valve N9 and the fifth nitrogen valve N5. At the same time, open the tenth nitrogen valve N10 at the outlets of the first molecular sieve A45 and the second molecular sieve B45, so that part of the nitrogen separated by adsorption passes through the outlet of the second molecular sieve B45 and enters the first molecular sieve A45 through the outlet of the first molecular sieve A45, and part of the air that has not been fully separated flows through the ninth nitrogen valve N9, the seventh nitrogen valve N7 and the fifth nitrogen valve N5, and enters the first molecular sieve A45 through the inlet of the first molecular sieve A45; thereby increasing the internal pressure in the first molecular sieve A45, achieving the equalization pressure effect of the first molecular sieve A45 and the second molecular sieve B45, avoiding damage to the internal bed process caused by the first molecular sieve A45 being in a low-pressure state for a long time, and also being beneficial to reducing the energy required for subsequent adsorption in the first molecular sieve A45, so that the first molecular sieve A45 can reach the pressure requirements for nitrogen separation and adsorption by introducing a small amount of air, that is, quickly carry out nitrogen adsorption and separation in the first molecular sieve A45; then open the third nitrogen valve N3 to gradually reduce the air pressure in the first molecular sieve A45 and achieve the desorption effect on the first molecular sieve A45, and also make the gas desorbed from the first molecular sieve A45 discharged through the third nitrogen valve N3; for subsequent nitrogen separation of the first molecular sieve A45.

[0039] Similarly, after the first molecular sieve A45 continues to operate for a period of time, the eighth nitrogen valve N8 connected to the outlet of the first molecular sieve A45, the sixth nitrogen valve N6 connected to the inlet of the second molecular sieve B45, and the seventh nitrogen valve N7 located between the eighth nitrogen valve N8 and the sixth nitrogen valve N6 are opened. At the same time, the tenth nitrogen valve N10 located at the outlets of the first molecular sieve A45 and the second molecular sieve B45 is opened, so that part of the nitrogen separated by adsorption passes through the outlet of the first molecular sieve A45 and enters the second molecular sieve B45 through the outlet of the second molecular sieve B45, and part of the air that has not been fully separated flows through the eighth nitrogen valve N8, the seventh nitrogen valve N7, and the sixth nitrogen valve N6 and enters the second molecular sieve B45 through the inlet of the second molecular sieve B45; thereby increasing the internal pressure in the second molecular sieve B45, achieving the pressure equalization effect between the first molecular sieve A45 and the second molecular sieve B45, and being more suitable for the separation of nitrogen in the air by the second molecular sieve B45; more specifically, both the first molecular sieve A45 and the second molecular sieve B45 are filled with carbon molecular sieve, and the outlets of the first molecular sieve A45 and the second molecular sieve B45 are simultaneously connected to the second buffer tank 43.

[0040] In order to effectively utilize the energy of the separated nitrogen and better improve the power generation efficiency of the system, preferably, the outlets of the first molecular sieve A45 and the second molecular sieve B45 are simultaneously connected to the first heat exchanger 32, and the first heat exchanger 32 is further connected to the purification device 51; the nitrogen separated from the first molecular sieve A45 or the second molecular sieve B45 enters the first heat exchanger 32 to exchange heat with the decomposed hydrogen-nitrogen mixed gas, reducing the temperature of the hydrogen-nitrogen mixed gas to be suitable for the power generation of the subsequent fuel cell 54; the nitrogen after heat exchange is discharged from the first heat exchanger 32 and then enters the purification device 51, and exchanges heat again with the cooled hydrogen-nitrogen mixed gas discharged from the first water cooler 33, and the nitrogen after heat exchange is discharged from the purification device 51.

[0041] Similarly, the first buffer tank 42 is also connected to a second pressure swing adsorption device 46. The second pressure swing adsorption device 46 includes a third molecular sieve C46 and a fourth molecular sieve D46. The third molecular sieve C46 and the fourth molecular sieve D46 are arranged in parallel. Specifically, the inlet of the third molecular sieve C46 is connected to the inlet of the fourth molecular sieve D46, and the inlet of the third molecular sieve C46 and the inlet of the fourth molecular sieve D46 are connected by a seventh pipeline and an eighth pipeline arranged in parallel; a first oxygen valve M1 and a second oxygen valve M2 are arranged in series on the seventh pipeline, and a third oxygen valve M3 and a fourth oxygen valve M4 are arranged in series on the eighth pipeline. The first oxygen valve M1 and the third oxygen valve M3 are arranged close to the inlet of the third molecular sieve C46, and the second oxygen valve M2 and the fourth oxygen valve M4 are arranged close to the inlet of the fourth molecular sieve D46; the outlet of the third molecular sieve C46 is connected to the outlet of the fourth molecular sieve D46, and the inlet of the third molecular sieve C46 and the inlet of the fourth molecular sieve D46 are connected by a ninth pipeline and a tenth pipeline arranged in parallel; a tenth oxygen valve M10 is arranged on the ninth pipeline, and an eleventh oxygen valve M11 and a twelfth oxygen valve M12 are arranged in series on the tenth pipeline. The eleventh oxygen valve M11 is arranged close to the third molecular sieve C45, and the twelfth oxygen valve M12 is arranged close to the fourth molecular sieve D45; in order to balance the pressure during the adsorption and desorption processes of the two molecular sieves and reduce the gas consumption during the gas separation process; preferably, the outlet of the third molecular sieve C45 is connected to the inlet of the fourth molecular sieve D45 through an eleventh pipeline, and a sixth oxygen valve M6, a seventh oxygen valve M7, and an eighth oxygen valve M8 are sequentially arranged on the eleventh pipeline. The sixth oxygen valve M6 is arranged close to the inlet of the fourth molecular sieve D46, and the eighth oxygen valve M8 is arranged close to the outlet of the third molecular sieve C46; the outlet of the fourth molecular sieve D46 and the inlet of the third molecular sieve C46 are connected by a twelfth pipeline. The twelfth pipeline intersects with the eleventh pipeline and is connected through the seventh oxygen valve M7 on the eleventh pipeline; a fifth oxygen valve M5 and a ninth oxygen valve M9 are also arranged on the twelfth pipeline. The fifth oxygen valve M5 is arranged close to the third molecular sieve C46; by opening the corresponding oxygen valves on the corresponding pipelines, the flow direction of the gas between the third molecular sieve C46 and the fourth molecular sieve D46 is adjusted, and the on-line switching of adsorption and desorption between the two molecular sieves is realized, improving the oxygen separation efficiency of the second pressure swing adsorption device 46 and reducing the air consumption of the device.

[0042] The buffered air discharged from the first buffer tank 42 enters the seventh pipeline of the second pressure swing adsorption device 46. The first oxygen valve M1 and the eleventh oxygen valve M11 are opened, and the remaining oxygen valves are maintained closed, so that all the air enters the third molecular sieve C46 for adsorption separation. The separated oxygen is discharged through the eleventh oxygen valve M11 above the third molecular sieve C46. When the third molecular sieve A45 is saturated with adsorption, the first oxygen valve M1 and the eleventh oxygen valve M11 are closed, the second oxygen valve M2 and the twelfth oxygen valve M12 are opened, and the remaining oxygen valves are maintained closed. The air is introduced into the fourth molecular sieve D46 to separate the oxygen in the air through the fourth molecular sieve D46. The separated oxygen is discharged through the twelfth oxygen valve M12. After running for a period of time, the ninth oxygen valve M9 connected to the outlet of the fourth molecular sieve D46, the fifth oxygen valve M5 connected to the inlet of the third molecular sieve C46, and the seventh oxygen valve M7 located between the ninth oxygen valve M9 and the fifth oxygen valve M5 are opened. At the same time, the tenth oxygen valve M10 located at the outlets of the third molecular sieve C46 and the fourth molecular sieve D46 is opened, so that part of the oxygen separated by adsorption passes through the outlet of the fourth molecular sieve B45, enters the third molecular sieve C46 through the outlet of the third molecular sieve C46, and part of the air that has not been fully separated flows through the ninth oxygen valve M9, the seventh oxygen valve M7, and the fifth oxygen valve M5, and enters the third molecular sieve C46 through the inlet of the third molecular sieve C46; thereby increasing the internal pressure in the third molecular sieve C46, achieving the equalization effect of the third molecular sieve C46 and the fourth molecular sieve D46, avoiding damage to the internal bed process caused by the third molecular sieve C46 being in a low-pressure state for a long time, and also being beneficial to reducing the energy required for subsequent adsorption in the third molecular sieve C46, enabling the third molecular sieve C46 to reach the pressure requirements for nitrogen separation and adsorption by introducing a small amount of air, that is, quickly carrying out oxygen adsorption and separation in the third molecular sieve C46; Subsequently, the third oxygen valve M3 is opened to gradually reduce the air pressure in the third molecular sieve C46 and achieve the desorption effect on the third molecular sieve C46, and the gas desorbed from the third molecular sieve C46 is also discharged through the third oxygen valve M3; for subsequent oxygen separation of the third molecular sieve C46.

[0043] Similarly, after the third molecular sieve C46 continues to operate for a period of time, the eighth oxygen valve M8 connected to the outlet of the third molecular sieve C46, the sixth oxygen valve M6 connected to the inlet of the fourth molecular sieve D46, and the seventh oxygen valve M7 located between the eighth oxygen valve M8 and the sixth oxygen valve M6 are opened. At the same time, the tenth oxygen valve M10 located at the outlets of the third molecular sieve C46 and the fourth molecular sieve D46 is opened, so that part of the oxygen separated by adsorption passes through the outlet of the third molecular sieve C46 and the outlet of the fourth molecular sieve D46 and enters the fourth molecular sieve D46. Part of the air that has not been fully separated flows through the eighth oxygen valve M8, the seventh oxygen valve M7, and the sixth oxygen valve M6 and enters the fourth molecular sieve D46 through the inlet of the fourth molecular sieve D46; thereby increasing the internal pressure in the fourth molecular sieve D46, achieving the pressure equalization effect between the third molecular sieve C46 and the fourth molecular sieve D46, and better applying to the separation of oxygen in the air by the fourth molecular sieve D46; more specifically, both the third molecular sieve C46 and the fourth molecular sieve D46 are filled with zeolite molecular sieves; the outlets of the third molecular sieve C46 and the fourth molecular sieve D46 are simultaneously connected to the third buffer tank 44.

[0044] The power generation and gas supply system of a hydrogen production device by ammonia decomposition with microwave heating according to the present invention, by adopting an ammonia decomposition hydrogen production device made of microwave heating and ceramic materials, combined with the setting of multiple catalytic pipelines and baffles at different positions, enables ammonia to flow back and forth up and down in multiple catalytic pipelines in the decomposition part, so that while the flow distance of ammonia is lengthened, it continuously oscillates and rubs, and is heated and decomposed more fully and completely, greatly improving the decomposition efficiency of ammonia and the heat exchange effect of the device; at the same time, combined with the mutually circulating and communicating water tank, the first water cooler, the second water cooler and the evaporator, the heat generated during the operation of the system can be transferred between multiple components through the flow of liquid water, meeting the temperature requirements for the operation of each component, as well as the recycling and reuse of liquid water and heat; in the gas production mechanism, by adopting molecular sieves arranged in parallel and connecting the outlets and inlets of the molecular sieves arranged in parallel to each other, the molecular sieves arranged in parallel can be used alternately in a cycle, and the generated gas is fully and effectively utilized during the use process, achieving on-line adsorption and desorption of the molecular sieves while also protecting the molecular sieves, improving the efficiency of gas separation from the air in the system and the energy utilization rate during the operation of the system; realizing the organic combination of ammonia decomposition hydrogen production power generation and air liquefaction separation for oxygen and nitrogen production, reducing the energy consumption and temperature balance during the operation of the overall system, and being beneficial to the stable operation of the system.

[0045] Obviously, the above embodiments are merely examples given for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or variations derived therefrom still fall within the protection scope of the present invention.

Claims

1. A power generation and gas supply system containing a hydrogen production device by ammonia decomposition with microwave heating, comprising an ammonia tank, a hydrogen production device by ammonia decomposition, a water circulation mechanism, a gas production mechanism, and a power generation mechanism, characterized in that: The ammonia tank is communicated with the ammonia gas inlet of the hydrogen production device by ammonia decomposition; the hydrogen production device by ammonia decomposition includes a microwave heating part and a decomposition part, the upper end of the decomposition part is communicated with the ammonia gas inlet and the decomposed gas outlet; the decomposition part is located inside the microwave heating part; The water circulation mechanism includes a water tank, a first heat exchanger, a first water cooler, and a second water cooler. The water tank is communicated with the first water cooler; the water tank is communicated with the second water cooler; the decomposed gas outlet is sequentially communicated with the first heat exchanger and the first water cooler; the liquid water in the water tank can circulate between the first water cooler and the second water cooler; the first water cooler is connected to the power generation mechanism; The gas production mechanism includes a compressor, a first buffer tank, a second buffer tank, and a first pressure swing adsorption device. The compressor is connected in series with the first buffer tank, and the first buffer tank is then connected to the first pressure swing adsorption device; the first pressure swing adsorption device includes a first molecular sieve and a second molecular sieve arranged in parallel. The outlet of the first molecular sieve is connected to the outlet of the second molecular sieve, and multiple nitrogen valves are arranged between the outlet of the first molecular sieve and the outlet of the second molecular sieve; the inlet of the first molecular sieve is connected to the inlet of the second molecular sieve, and multiple nitrogen valves are arranged between the inlet of the first molecular sieve and the inlet of the second molecular sieve; the outlet of the first molecular sieve is also connected to the inlet of the second molecular sieve, and multiple nitrogen valves are arranged between the outlet of the first molecular sieve and the inlet of the second molecular sieve; the outlet of the second molecular sieve is also connected to the inlet of the first molecular sieve, and multiple nitrogen valves are arranged between the outlet of the second molecular sieve and the inlet of the first molecular sieve.

2. The power generation and gas supply system comprising a microwave heating ammonia decomposition hydrogen production device according to claim 1, characterized in that: The hydrogen production device by ammonia decomposition includes a microwave heating part and a decomposition part. The microwave heating part is of a hollow structure, the decomposition part is located at the exact center position inside the microwave heating part, and there is a gap between the outer wall of the decomposition part and the inner wall of the microwave heating part; a ceramic block is arranged between the bottom of the decomposition part and the microwave heating part; the decomposition part is made of ceramic material.

3. The power generation and gas supply system with a microwave heating ammonia decomposition hydrogen production device according to claim 2, wherein: A solid pipeline is arranged in the decomposition body of the decomposition part, and multiple catalytic pipelines are arranged in the solid pipeline. The two ends of the catalytic pipeline respectively pass through the upper surface and the lower surface of the solid pipeline; the multiple catalytic pipelines are spaced from each other; a first baffle and a second baffle are fixed on the upper surface of the solid pipeline. The first baffle and the second baffle are perpendicular to each other and are both fixedly connected to the top surface of the decomposition body at the same time; a third baffle is vertically fixed on the bottom surface of the decomposition body, and the third baffle is also fixedly connected to the bottom surface of the decomposition body at the same time; The first surface, together with the first baffle, the second baffle, and the top surface of the decomposition body, jointly form a first interval; the fourth surface, together with the third baffle and the bottom surface of the decomposition body, jointly form a second interval; the third surface, the first baffle, and the top surface of the decomposition body jointly form a third interval; the fifth surface, the third baffle, and the bottom surface of the decomposition body jointly form a fourth interval; the second surface, the second baffle, the first baffle, and the top surface of the decomposition body jointly form a fifth interval. The first interval and the second interval are connected by a plurality of the catalytic pipelines; the second interval and the third interval are connected by a plurality of the catalytic pipelines; the third interval and the fourth interval are connected by a plurality of the catalytic pipelines; the fourth interval and the fifth interval are connected by a plurality of the catalytic pipelines.

4. A power generation and gas supply system comprising a microwave heating ammonia decomposition hydrogen production device according to claim 3, characterized in that: The first baffle is located at the horizontal center line position of the upper surface of the solid pipeline; the second baffle is located at the vertical center line position of the upper surface of the solid pipeline; the third baffle is located at the vertical center position of the lower surface of the solid pipeline; the catalytic pipelines are filled with ammonia decomposition catalysts.

5. A power generation and gas supply system comprising a microwave heating ammonia decomposition hydrogen production device according to claim 1, characterized in that: The power generation mechanism includes a purification device, a fuel cell, a storage battery, and a power conversion module; the purification device is connected to the fuel cell, the fuel cell is connected to the storage battery, the storage battery is then connected to the power conversion module, and the purification device is connected to the first water cooler.

6. The power generation and gas supply system with a microwave heating ammonia decomposition hydrogen production device according to claim 5, characterized in that: The purification device and the first water cooler are connected by a pipeline, and a first heater is arranged in parallel on the pipeline between the purification device and the first water cooler; the first heat exchanger is connected to the outlets of the first molecular sieve and the second molecular sieve, and the first heat exchanger is then connected to the purification device.

7. A power generation and gas supply system comprising a microwave heating ammonia decomposition hydrogen production device according to claim 1, characterized in that: The water circulation mechanism further includes an evaporator, which is arranged between the ammonia tank and the ammonia decomposition hydrogen production device and is respectively connected to the ammonia tank and the hydrogen inlet of the ammonia decomposition hydrogen production device; the evaporator is also connected to the water tank and the second water cooler; the compressor is connected to the second water cooler.

8. A power generation and gas supply system comprising a microwave heating ammonia decomposition hydrogen production device according to claim 1, characterized in that: The inlet of the first molecular sieve is connected to the inlet of the second molecular sieve through a first pipeline and a second pipeline arranged in parallel; a first nitrogen valve and a second nitrogen valve are arranged in series on the first pipeline, a third nitrogen valve and a fourth nitrogen valve are arranged in series on the second pipeline, the first nitrogen valve and the third nitrogen valve are arranged close to the inlet of the first molecular sieve, and the second nitrogen valve and the fourth nitrogen valve are arranged close to the inlet of the second molecular sieve; the inlet of the first molecular sieve is connected to the inlet of the second molecular sieve through a third pipeline and a fourth pipeline arranged in parallel; a tenth nitrogen valve is arranged on the third pipeline, an eleventh nitrogen valve and a twelfth nitrogen valve are arranged in series on the fourth pipeline, the eleventh nitrogen valve is arranged close to the first molecular sieve, and the twelfth nitrogen valve is arranged close to the second molecular sieve; the outlet of the first molecular sieve is connected to the inlet of the second molecular sieve through a fifth pipeline, and a sixth nitrogen valve, a seventh nitrogen valve and an eighth nitrogen valve are successively arranged on the fifth pipeline, the sixth nitrogen valve is arranged close to the inlet of the second molecular sieve, and the eighth nitrogen valve is arranged close to the outlet of the first molecular sieve; the outlet of the second molecular sieve is connected to the inlet of the first molecular sieve through a sixth pipeline, the sixth pipeline intersects with the fifth pipeline and is connected through the seventh nitrogen valve on the fifth pipeline; a fifth nitrogen valve and a ninth nitrogen valve are further arranged on the sixth pipeline, the fifth nitrogen valve is arranged close to the first molecular sieve, and carbon molecular sieves are filled in both the first molecular sieve and the second molecular sieve.

9. The power generation and gas supply system comprising a microwave heating ammonia decomposition hydrogen production device according to claim 1, wherein: It further includes a second pressure swing adsorption device, and the second pressure swing adsorption device includes a third molecular sieve and a fourth molecular sieve arranged in parallel. The outlet of the third molecular sieve is connected to the outlet of the fourth molecular sieve, and a plurality of oxygen valves are arranged between the outlet of the third molecular sieve and the outlet of the fourth molecular sieve; the inlet of the third molecular sieve is connected to the inlet of the fourth molecular sieve, and a plurality of oxygen valves are arranged between the inlet of the third molecular sieve and the inlet of the fourth molecular sieve; the outlet of the third molecular sieve is further connected to the inlet of the fourth molecular sieve, and a plurality of oxygen valves are arranged between the outlet of the third molecular sieve and the inlet of the fourth molecular sieve; the outlet of the fourth molecular sieve is further connected to the inlet of the third molecular sieve, and a plurality of oxygen valves are arranged between the outlet of the fourth molecular sieve and the inlet of the third molecular sieve.

10. A power generation and gas supply system comprising a microwave heating ammonia decomposition hydrogen production device according to claim 9, characterized in that: Zeolite molecular sieves are filled in both the third molecular sieve and the fourth molecular sieve; the outlets of the third molecular sieve and the fourth molecular sieve are simultaneously connected to a third buffer tank.

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