Dual-cycle coke hydrogen production system and hydrogen production method based on high-concentration light collection by Fresnel mirrors

Abstract

The present invention relates to the technical field of hydrogen production, and particularly to a dual-cycle coke hydrogen production system and a hydrogen production method based on high-concentration light collection by a Fresnel mirror, which includes a carbon dioxide and water production unit, a high-concentration light collection photoelectric unit, a carbon monoxide production unit, a hydrogen production unit, a dual-cycle unit, and an auxiliary heating unit; the dual-cycle unit includes a gas pipeline, a water tank, and a water pipeline; the carbon dioxide and water production unit, the carbon monoxide production unit, and the hydrogen production unit are sequentially connected in series through the gas pipeline to form a closed pipeline; both ends of the water pipeline are connected to the water tank, the water pipeline runs through the hydrogen production system, and the high-concentration light collection photoelectric unit is connected to the auxiliary heating unit, so that the water in the water pipeline flowing through the carbon monoxide production unit and the hydrogen production unit is cooled by heat exchange and returns to the water tank. The present invention realizes the dual cycle of carbon dioxide and water, and directly or indirectly uses solar energy to create the high-temperature environment required by the carbon monoxide production unit and the hydrogen production unit, ensuring the hydrogen production productivity of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production, and relates to a dual-cycle coke hydrogen production system and a hydrogen production method based on high-concentration Fresnel mirror light collection. Background Art

[0002] With the development of the economy and the progress of society, people have put forward higher and higher requirements for energy, and finding new energy has become an urgent issue faced by mankind. As a clean and efficient new energy, solar energy utilization has become an important part of the national sustainable development strategy in various countries. Hydrogen is currently recognized as a clean energy and is also a very important chemical raw material. The calorific value of hydrogen combustion is the highest among various fuels, 3 to 4 times that of petroleum; the product of hydrogen combustion is water, which does not cause any pollution to the environment; currently, countries around the world attach great importance to the research on hydrogen as a new energy. However, the important factor restricting the large-scale commercial application of hydrogen energy is that a cheap hydrogen production technology has not been found yet. Solar energy is the most common primary energy, and the operating cost of solar energy collection and heating technology is very low, completely green and zero-emission. Combining solar energy with hydrogen energy to develop a cheaper hydrogen production technology is the focus of the present invention.

[0003] Currently, there are mainly two methods for producing hydrogen. One method uses other hydrogen-containing raw materials, such as methane / steam, etc. to produce hydrogen through chemical reactions. Methane / steam reforming to produce hydrogen has the advantages of simple process and low cost, and is one of the most mature methods for industrial hydrogen production. It not only converts the greenhouse gas methane, but also produces a large amount of hydrogen during the reaction. In addition, as the cleanest energy, hydrogen has a wide range of application fields. However, the methane / steam reforming reaction is a strongly endothermic reaction. To obtain a higher methane conversion rate, the reaction generally needs to be carried out at a high temperature (600 - 800 °C). The extremely high reaction temperature has a high cost and a large price. Therefore, how to seek a cheap and clean high-temperature heat source to provide the heat required for the methane / steam reforming reaction is the key to promoting the development and application of the methane / steam reforming technology. Another method uses electrolysis to produce hydrogen. For example, the high-temperature steam electrolysis hydrogen production technology uses a high-temperature solid oxide electrolyzer (SOEC) to electrolyze water vapor. This technology has the advantages of less power consumption, high efficiency, and low cost. Providing high-quality heat energy above 800 °C for the electrolyzer can be achieved by renewable energy or nuclear energy, but obtaining heat energy by burning fossil energy is considered uneconomical and not environmentally friendly. Conventional solar thermal concentrating systems cannot provide stable heat energy. As the weather changes or after sunset, the system cannot operate stably and continuously.

[0004] Therefore, how to provide a hydrogen production system with a stable heat source and capable of ensuring the continuous and stable operation of the system is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a dual-cycle coke hydrogen production system and a hydrogen production method based on high-concentration Fresnel mirror condensation, which uses the coke after coal coking as the hydrogen production raw material, not only reducing the environmental pollution caused by industrial by-products, but also improving the resource utilization rate and economic effect by using solar energy.

[0006] In order to achieve the above object, the technical solution provided by the present invention is as follows: In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A dual-cycle coke hydrogen production system based on high-concentration Fresnel mirror condensation includes a carbon dioxide and water production unit, a high-concentration Fresnel mirror optoelectronic unit, a carbon monoxide production unit, a hydrogen production unit, a dual-cycle unit and an auxiliary heating unit;

[0008] The dual-cycle unit includes an air pipeline, a water tank and a water pipeline;

[0009] The carbon dioxide and water production unit, the carbon monoxide production unit and the hydrogen production unit are sequentially connected in series through the air pipeline to form a closed pipeline structure; the carbon dioxide and water production unit supplies the carbon dioxide required for the reaction to the carbon monoxide production unit, and the mixed gas generated by the reaction of carbon dioxide with coke in the carbon monoxide production unit is purified and separated. The separated carbon monoxide enters the hydrogen production unit, and the separated waste gas is harmlessly discharged after passing through the waste gas treatment module; in the hydrogen production unit, the incoming carbon monoxide reacts with water, and the generated high-temperature mixed gas is cooled and separated. The separated hydrogen is collected; the separated carbon dioxide enters the carbon dioxide and water production unit for the next cycle, thus realizing the carbon cycle;

[0010] Both ends of the water pipeline are connected to the water tank. The water pipeline runs through the hydrogen production system, and the high-concentration Fresnel mirror optoelectronic unit is connected to the auxiliary heating unit, so that the water in the water pipeline flowing through the carbon monoxide production unit and the hydrogen production unit is cooled by heat exchange and returns to the water tank. Enter the next cycle, thus realizing the water cycle.

[0011] Further, the carbon dioxide and water production unit includes a condensation heating unit and a carbon dioxide collection chamber; a semiconductor condensation heating layer is arranged inside the condensation heating unit, and a mesh hole is distributed on the semiconductor condensation heating layer. The semiconductor condensation heating layer divides the condensation heating unit into a condensation chamber and a gasification chamber from top to bottom; an air coil is arranged in the condensation chamber, and a number of round holes are distributed on the air coil. The gasification chamber includes a first chamber and a second chamber. The first chamber is communicated with the carbon dioxide collection chamber, and the second chamber is communicated with the water tank.

[0012] Further, the high-concentration photovoltaic power unit provides electrical energy for the hydrogen production system, and includes a Fresnel mirror I, a photovoltaic power generation panel, a low-temperature water coil, and a storage battery; the Fresnel mirror I is embedded above the photovoltaic power generation panel, the low-temperature water coil is arranged on the back of the photovoltaic power generation panel, the input end of the low-temperature water coil is connected to the water tank, and the output end is connected to the hydrogen production unit; the photovoltaic power generation panel is connected to the storage battery.

[0013] Further, the hydrogen production unit includes a Fresnel mirror high-concentration photothermal module, a hydrogen reaction chamber, and a mixed gas treatment module. The Fresnel mirror high-concentration photothermal module is arranged above the hydrogen reaction chamber; the mixed gas treatment module is connected to the output end of the hydrogen reaction chamber.

[0014] Further, the hydrogen reaction chamber from the outside to the inside is successively a heat collection layer, a water layer I, and a hydrogen reaction cavity. The Fresnel mirror high-concentration photothermal module focuses light to the heat collection layer, and the output ends of the low-temperature water coils are respectively connected to the input ends of the water layer I and the hydrogen reaction cavity.

[0015] Further, the mixed gas treatment module includes a gas cooling unit, a hydrogen and carbon dioxide separation module, a hydrogen collection chamber, and a residual gas purification chamber. The gas cooling unit is arranged at the output end of the hydrogen reaction chamber and is connected to the hydrogen and carbon dioxide separation module. The hydrogen separated by the hydrogen and carbon dioxide separation module enters the hydrogen collection chamber, and the separated carbon dioxide enters the carbon dioxide and water preparation unit; other residual gases enter the residual gas purification chamber.

[0016] Further, the carbon monoxide production unit includes a coke raw material chamber, a carbon monoxide reaction chamber, and a carbon monoxide mixed gas purification and separation chamber connected in sequence; the output end of the carbon monoxide mixed gas purification and separation chamber is connected to the hydrogen reaction cavity.

[0017] Further, the carbon monoxide reaction chamber includes a carbon monoxide reaction cavity and a water layer II wrapped outside the carbon monoxide reaction cavity. The output end of the water layer I is connected to the water layer II.

[0018] Further, the auxiliary heating unit includes an electric heating plate I, an electric heating plate II, and an energy storage tank; the electric heating plate I is arranged in the carbon monoxide production unit, the electric heating plate II is arranged in the hydrogen production unit, the storage battery is connected to the electric heating plate I and the electric heating plate II, the input end of the energy storage tank is connected to the carbon monoxide production unit, and the output end is connected to the mixed gas treatment module.

[0019] The second object of the present invention is to provide a hydrogen production method for a double-cycle coke hydrogen production system based on high-concentration Fresnel mirror light collection, which has the same technical effects.

[0020] The chemical reactions involved in the present invention are:

[0021] C + CO 2 = 2CO (high temperature); CO + H 2O=CO 2 +H 2 (at high temperature).

[0022] A hydrogen production method for a double-cycle coke hydrogen production system based on high-concentration Fresnel mirror condensation, comprising the following steps:

[0023] S01: The carbon dioxide generated by the carbon dioxide and water production unit enters the carbon monoxide production unit along the conveying direction of the gas pipeline; reacts with the coke inside the carbon monoxide production unit to generate carbon monoxide;

[0024] S02: The high-temperature water vapor heated in the water pipeline enters the hydrogen reaction chamber and reacts with the carbon monoxide output from the carbon monoxide production unit to generate a mixed gas of hydrogen and carbon dioxide;

[0025] S03: Separate the mixed gas generated in step S02, collect hydrogen, and input the separated carbon dioxide into the carbon dioxide and water production unit to participate in the next reaction;

[0026] S04: The unreacted high-temperature water vapor in step S02 is cooled by heat exchange through the auxiliary heating unit and returns to the water tank.

[0027] The beneficial effects of the present invention are:

[0028] The present invention transfers carbon dioxide to the carbon monoxide production unit through the carbon dioxide and water production unit for producing carbon monoxide, then reacts carbon monoxide with water to generate hydrogen and carbon dioxide, and then realizes the dual cycle of carbon dioxide and water through the double-cycle unit, improving the resource utilization rate. Further, the high-concentration Fresnel mirror photoelectric unit provides electric energy for the entire system. Through its connection with the auxiliary heating unit, the light energy and heat energy of solar energy are used to directly or indirectly create the high-temperature environment required by the carbon monoxide production unit and the hydrogen production unit, which is clean and environmentally friendly; ensuring the hydrogen production productivity of the hydrogen production system. Compared with the prior art, the present system realizes the recycling of carbon dioxide and water, not only saving costs, improving resource utilization rate and economic benefits, but also reducing pollution and improving the environment.

[0029] Green chemistry has an important position internationally. The "5R" principle is the core content of green chemistry. This invention uses coke as a hydrogen production raw material to react with carbon dioxide to produce carbon monoxide, making full use of industrial by-products. It not only saves costs, improves resource utilization rate and economic benefits, but also reduces pollution and improves the environment. High-concentration solar heating, circulating water heating, and electromagnetic heat pipe heating are used to achieve the high-temperature conditions required for the reaction, and the addition of a controller ensures the controllability and safety of the reaction. Through a double-cycle unit, the recycling of carbon dioxide and water is realized. During the reaction, the generation of waste can be reduced and comprehensive recycling can be achieved. Compared with the existing technology, this invention realizes the comprehensive utilization of solar energy and develops a more inexpensive hydrogen production technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the double-cycle coke hydrogen production system of the present invention;

[0032] Figure 2 It is a schematic structural diagram of the carbon dioxide and water production unit of the present invention;

[0033] Figure 3 It is a schematic structural diagram of the high-concentration solar photovoltaic unit of the present invention;

[0034] Figure 4 It is a schematic structural diagram of the hydrogen production unit of the present invention;

[0035] Figure 5 It is a schematic structural diagram of the carbon monoxide reaction chamber of the present invention;

[0036] Figure 6 It is a circulation route diagram of the double-cycle coke hydrogen production system of the present invention;

[0037] Figure 7 It is a step flow chart of the hydrogen production method of the present invention.

[0038] In the figure: 1. Carbon dioxide and water production unit; 11. Condensation and heating unit; 111. Semiconductor condensation and heating layer; 112. Condensation chamber; 113. Vaporization chamber; 114. Air coil; 115. First chamber; 116. Second chamber; 12. Carbon dioxide collection chamber; 2. High-concentration sunlight photovoltaic unit; 21. Fresnel mirror I; 22. Photovoltaic power generation panel; 23. Low-temperature water coil; 24. Storage battery; 3. Carbon monoxide production unit; 31. Coke raw material chamber; 32. Carbon monoxide reaction chamber; 321. Carbon monoxide reaction cavity; 322. Water layer II; 323. Temperature and humidity measuring instrument I; 33. Carbon monoxide mixed gas purification and separation chamber; 4. Hydrogen production unit; 41. High-concentration sunlight solar thermal module of Fresnel mirror; 42. Hydrogen reaction chamber; 421. Heat collection layer; 422. Water layer I; 423. Hydrogen reaction cavity; 424. Temperature and humidity measuring instrument II; 43. Mixed gas treatment module; 431. Gas cooling unit; 432. Hydrogen and carbon dioxide separation module; 433. Hydrogen collection chamber; 434. Residual gas purification chamber; 435. Cold water coil; 5. Double-cycle unit; 51. Gas pipeline; 52. Water tank; 53. Water pipeline; 54. Electric water pump; 55. Solenoid valve; 6. Auxiliary heating unit; 61. Electric heating plate I; 62. Electric heating plate II; 63. Energy storage tank. Detailed implementation mode

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation mode.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0042] Such as Figures 1 to 6The double-cycle coke hydrogen production system based on high-concentration Fresnel mirror condensation shown in the figure includes a carbon dioxide and water production unit 1, a high-concentration Fresnel mirror photoelectric unit 2, a carbon monoxide production unit 3, a hydrogen production unit 4, a double-cycle unit 5, and an auxiliary heating unit 6; the double-cycle unit 5 includes an air pipeline 51, a water tank 52, and a water pipeline 53;

[0043] The carbon dioxide and water production unit 1, the carbon monoxide production unit 3, and the hydrogen production unit 4 are sequentially connected in series through the air pipeline 51 to form a closed pipeline structure; the carbon dioxide and water production unit 1 supplies the carbon dioxide required for the reaction to the carbon monoxide production unit 3. The mixed gas generated by the reaction of carbon dioxide with coke in the carbon monoxide production unit 3 is purified and separated. The separated carbon monoxide enters the hydrogen production unit 4, and the separated waste gas is harmlessly discharged after passing through the waste gas treatment module; in the hydrogen production unit 4, the incoming carbon monoxide reacts with water, and the generated high-temperature mixed gas is cooled and separated. The separated hydrogen is collected; the separated carbon dioxide enters the carbon dioxide and water production unit 1 for the next cycle. In summary, the carbon cycle is realized.

[0044] Both ends of the water pipeline 53 are connected to the water tank 52. The water pipeline 53 runs through the hydrogen production system. The high-concentration Fresnel mirror photoelectric unit 2 is connected to the auxiliary heating unit 6, so that the water in the water pipeline 53 flowing through the carbon monoxide production unit 3 and the hydrogen production unit 4 is cooled by heat exchange and returns to the water tank 52. Specifically, in this embodiment, the electric water pump 54 is turned on, and the low-temperature water enters the low-temperature water coil 23 below the high-concentration Fresnel mirror photoelectric unit 2 from the water tank 52. The low-temperature water in the low-temperature water coil 23 undergoes heat exchange to generate high-temperature water vapor; a part of the generated high-temperature water vapor directly enters the hydrogen production unit 4 to react with carbon monoxide, and a part enters the water layer I of the hydrogen production unit 4 to create a high-temperature environment for the reaction in the hydrogen production unit 4. The water layer I of the hydrogen production unit 4 is connected to the water layer II 322 of the carbon monoxide production unit 3. When the high-temperature water vapor flows through the water layer II 322 of the carbon monoxide production unit 3, it also creates a high-temperature environment for the reaction in the cavity. Then, the high-temperature water vapor is cooled by heat exchange through the auxiliary heating unit 6, and at the same time, the low-temperature water is preheated and returns to the water tank 52 for the next cycle. In summary, the water cycle is realized.

[0045] In the present invention, carbon dioxide is transmitted to the carbon monoxide production unit 3 through the carbon dioxide and water production unit 1 for the production of carbon monoxide. Then, hydrogen and carbon dioxide are generated by the reaction of carbon monoxide and water. The double circulation unit 5 is used to achieve the double circulation of carbon dioxide and water, improving the resource utilization rate. Furthermore, the high-concentration photovoltaic power unit 2 provides electric energy for the entire system. By connecting it with the auxiliary heating unit 6, the light energy and heat energy of solar energy are used to directly or indirectly create the high-temperature environment required by the carbon monoxide production unit 3 and the hydrogen production unit 4, which is clean and environmentally friendly; and the hydrogen production productivity of the hydrogen production system is ensured. Compared with the prior art, the present system realizes the recycling of carbon dioxide and water, not only saving costs, improving resource utilization rate and economic benefits, but also reducing pollution and improving the environment.

[0046] Green chemistry has an important position internationally. The "5R" principle is the core content of green chemistry. In the present invention, coke is used as the hydrogen production raw material to react with carbon dioxide to prepare carbon monoxide, making full use of industrial by-products, not only saving costs, improving resource utilization rate and economic benefits, but also reducing pollution and improving the environment. Multiple heating methods such as high-concentration photovoltaic heating, circulating water heating, and electromagnetic heat pipe heating are used to achieve the high-temperature conditions required for the reaction. The addition of a controller ensures the controllability and safety of the reaction. The double circulation unit 5 realizes the recycling of carbon dioxide and water, and can reduce the generation of waste and achieve comprehensive recovery during the reaction. Compared with the prior art, the present invention realizes the comprehensive utilization of solar energy and develops a cheaper hydrogen production technology.

[0047] As Figure 2 shown, the carbon dioxide and water production unit 1 includes a condensation and heating unit 11 and a carbon dioxide collection chamber 12; a semiconductor condensation and heating layer 111 is arranged inside the condensation and heating unit 11, and a mesh of holes is distributed on the semiconductor condensation and heating layer 111. The semiconductor condensation and heating layer 111 divides the condensation and heating unit 11 from top to bottom into a condensation chamber 112 and a gasification chamber 113; an air coil 114 is arranged in the condensation chamber 112, and a number of round holes are distributed on the air coil 114. The gasification chamber 113 includes a first chamber 115 and a second chamber 116. The first chamber 115 is communicated with the carbon dioxide collection chamber 12, and the second chamber 116 is communicated with the water tank 52. When the semiconductor heating and condensation layer is powered on, the upper end is the cold end and the lower end is the hot end. The cold end reduces the temperature of the condensation chamber 112, and the hot end increases the temperature of the gasification chamber 113. The condensation temperature of different chambers can be controlled by the power-on time, and the electric energy required by the semiconductor heating and condensation layer is provided by the storage battery 24; when the system is in use, the external air passes through the air coil 114, and the condensed low-temperature water and carbon dioxide fall from the round holes on the air coil 114 respectively due to different condensation temperatures, and then come to the gasification chamber 113 through the mesh of holes of the semiconductor condensation and heating layer 111, and enter the water tank 52 and the carbon dioxide collection chamber 12 respectively after being heated.

[0048] As Figure 3 shown, the high-concentration photovoltaic power generation unit 2 supplies electrical energy to the hydrogen production system, and includes a Fresnel mirror I 21, a frame-shaped photovoltaic power generation panel 22, a low-temperature water coil 23, and a storage battery 24; the Fresnel mirror I 21 is embedded above the photovoltaic power generation panel 22, and the low-temperature water coil 23 is arranged on the back of the photovoltaic power generation panel 22 to take away the excess heat of the photovoltaic power generation panel 22 and improve the power generation efficiency of the photovoltaic power generation panel 22. The input end of the low-temperature water coil 23 is connected to the water tank 52 for introducing low-temperature water, and the output end is connected to the hydrogen production unit 4; a part of the generated high-temperature water is connected to the water layer I of the hydrogen production chamber to create a temperature condition for the reaction, and the other part is introduced into the hydrogen production unit 4 to react with carbon monoxide. The photovoltaic power generation panel 22 is connected to the storage battery 24, converts the sunlight concentrated by the Fresnel mirror I 21 into electrical energy, and stores it in the storage battery 24 to supply electrical energy to the entire system.

[0049] As Figure 1 and 5 shown, the carbon monoxide production unit 3 includes a coke raw material chamber 31, a carbon monoxide reaction chamber 32, and a carbon monoxide mixed gas purification and separation chamber 33 connected in sequence; the output end of the carbon monoxide mixed gas purification and separation chamber 33 is connected to the hydrogen production unit 4. A temperature and humidity measuring instrument I is arranged inside the carbon monoxide production unit 3, and the reaction condition can be monitored in real time through the temperature and humidity measuring instrument I. The carbon monoxide reaction chamber 32 includes a carbon monoxide reaction cavity 321 and a water layer II 322 wrapped outside the carbon monoxide reaction cavity 321. The cavity wall of the carbon monoxide reaction cavity 321 is made of a heat-absorbing material, which can absorb the heat of the water layer II 322 to provide a high-temperature condition for the reaction of carbon dioxide and coke; the carbon monoxide reaction cavity 321 is connected to the carbon dioxide collection chamber 12 to provide carbon dioxide for the reaction and is connected to the coke raw material chamber 31 to provide coke for the reaction; carbon dioxide and coke react in the carbon monoxide reaction cavity 321, and the generated mixed gas is purified and separated by the carbon monoxide mixed gas purification and separation chamber 33. The separated carbon monoxide enters the hydrogen production unit 4, and the separated waste gas is harmlessly discharged after passing through the waste gas treatment module. Specifically, in this embodiment, the coke raw materials required for the reaction in the carbon monoxide production unit 3 include any one of semi-coke, full coke, coke powder, coke granules, clean-type carbon, semi-coke, activated carbon, coke-containing granules, and tar.

[0050] As Figure 4As shown, the hydrogen production unit 4 includes a Fresnel mirror high-concentration solar thermal module 41, a hydrogen reaction chamber, and a mixed gas treatment module. The Fresnel mirror high-concentration solar thermal module 41 is arranged above the hydrogen reaction chamber; the mixed gas treatment module is connected to the output end of the hydrogen reaction chamber. A temperature and humidity meter II is arranged inside the hydrogen production unit 4, and the reaction condition can be monitored in real time through the temperature and humidity meter II. The hydrogen reaction chamber includes a heat collection layer, a water layer I, and a hydrogen reaction cavity from outside to inside. The Fresnel mirror high-concentration solar thermal module 41 concentrates sunlight onto the heat collection layer to provide high-temperature conditions for the reaction. The output end of the low-temperature water coil 23 and the output end of the carbon monoxide production unit 3 are both connected to the input end of the hydrogen reaction cavity. Specifically, the hydrogen reaction cavity is connected to the high-temperature water end of the low-temperature water coil 23 to provide H 2 O for the reaction, and is connected to the carbon monoxide and mixed gas purification and separation chamber 33 to provide carbon monoxide for the reaction; the high-temperature mixed gas generated in the hydrogen reaction cavity is cooled by the mixed gas treatment module and then purified and separated.

[0051] Specifically, the mixed gas treatment module includes a gas cooling unit 431, a hydrogen and carbon dioxide separation module, a hydrogen collection chamber 433, and a residual gas purification chamber 434. The gas cooling unit 431 is arranged at the output end of the hydrogen reaction chamber and is connected to the hydrogen and carbon dioxide separation module. The high-temperature mixed gas generated in the hydrogen reaction cavity first enters the hydrogen and carbon dioxide separation module after being cooled by the gas cooling unit 431. The hydrogen separated by the hydrogen and carbon dioxide separation module enters the hydrogen collection chamber 433, and the separated carbon dioxide enters the carbon dioxide collection chamber 12 of the carbon dioxide and water production unit 1 and is connected to the carbon monoxide production unit 3 for recycling; other residual gases enter the residual gas purification chamber 434. Specifically, in this embodiment, the hydrogen and carbon dioxide separation module 432 is composed of a gas separation chamber, a carbon dioxide semi-permeable membrane, and a hydrogen semi-permeable membrane. When the mixed gas enters the gas separation chamber, carbon dioxide passes through the carbon dioxide semi-permeable membrane, and hydrogen passes through the hydrogen semi-permeable membrane. The non-passing residual gases enter and exit the residual gas purification chamber 434; a cold water coil 435 is arranged inside the gas cooling unit 431; one end of the cold water coil 435 is connected to the energy storage tank 63 for accessing cold water, and the other end is connected to the water tank 52; the cold water coil 435 is arranged inside the cold water coil 435, and the cold water in the cold water coil 435 cools the high-temperature mixed gas and then returns to the water tank 52 to participate in the next water cycle.

[0052] As Figure 6As shown, the double circulation unit 5 further includes an electric water pump 54 and a solenoid valve 55; the electric water pump 54 is arranged on the water pipeline 53 to provide power for the water circulation system. The water circulation system runs through the whole system. The water tank 52 is connected to the input end (cold water end) of the low-temperature water coil 23 through the water pipeline 53 to introduce low-temperature water. The output end (high-temperature water end) of the low-temperature water coil 23 is communicated with the water layer I of the hydrogen production chamber and the hydrogen reaction chamber. The water layer I of the hydrogen production chamber is communicated with the water layer II 322 of the carbon monoxide reaction chamber 32. The high-temperature water in the water layer II 322 of the carbon monoxide reaction chamber 32 becomes low-temperature water. The low-temperature water passes through the water pipeline 53 and then further reduces the temperature of the water through the auxiliary heating unit 6 to generate cold water, and then is introduced into the gas cooling unit 431 to cool the high-temperature mixed gas, and then returns to the water tank 52 to enter the next cycle.

[0053] Solenoid valves 55 are installed on the gas pipelines 51 involved in the use of this system and are signal-connected to the intelligent controller to achieve the control of the reaction process and the guarantee of safety.

[0054] Please continue to refer to Figure 1 , the auxiliary heating unit 6 includes an electric heating plate I 61, an electric heating plate II 62 and an energy storage tank 63; the electric heating plate I 61 is arranged in the carbon monoxide production unit 3, and the electric heating plate II 62 is arranged in the hydrogen production unit 4. The storage battery 24 is connected to the electric heating plate I 61 and the electric heating plate II 62. The input end of the energy storage tank 63 is connected to the carbon monoxide production unit 3, and the output end is connected to the gas cooling unit 431. Specifically, in this embodiment, the electric heating plate I 61 is arranged at the bottom of the carbon monoxide reaction chamber 32. The high-temperature water vapor in the water layer I of the hydrogen production chamber is introduced into the water layer II 322 of the carbon monoxide reaction chamber 32 to provide the required temperature for the reaction together with the electric heating plate I 61; the electric heating plate II 62 is arranged below the hydrogen reaction chamber to assist the heat collection layer and the water layer I to create suitable high-temperature reaction conditions for the hydrogen production chamber.

[0055] As Figure 7 shown, a hydrogen production method of a double circulation coke hydrogen production system based on high-concentration Fresnel mirror condensation includes the following steps:

[0056] S01: The carbon dioxide generated by the carbon dioxide and water production unit 1 enters the carbon monoxide production unit 3 along the conveying direction of the gas pipeline 51; reacts with the coke inside the carbon monoxide production unit 3 to generate carbon monoxide;

[0057] S02: The heated high-temperature water vapor in the water pipeline 53 enters the hydrogen reaction chamber and reacts with the carbon monoxide output from the carbon monoxide production unit 3 to generate a mixed gas of hydrogen and carbon dioxide;

[0058] S03: Separate the mixed gas generated in step S02, collect hydrogen, and input the separated carbon dioxide into the carbon dioxide and water production unit 1 to participate in the next reaction;

[0059] S04: The unreacted high-temperature water vapor in step S02 exchanges heat and cools down through the auxiliary heating unit 6 and returns to the water tank 52.

[0060] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-cycle coke hydrogen production system based on high-concentration Fresnel mirror condensation, characterized in that, it includes a carbon dioxide and water production unit, a high-concentration Fresnel mirror photoelectric unit, a carbon monoxide production unit, a hydrogen production unit, a dual-cycle unit and an auxiliary heating unit; the dual-cycle unit includes an air pipeline, a water tank and a water pipeline; the carbon dioxide and water production unit, the carbon monoxide production unit, and the hydrogen production unit are sequentially connected in series through the air pipeline to form a closed pipeline structure; both ends of the water pipeline are connected to the water tank, the water pipeline runs through the hydrogen production system, and the high-concentration Fresnel mirror photoelectric unit is connected to the auxiliary heating unit, so that the water in the water pipeline flowing through the carbon monoxide production unit and the hydrogen production unit is cooled by heat exchange and returns to the water tank; the high-concentration Fresnel mirror photoelectric unit provides electric energy for the hydrogen production system, and includes a Fresnel mirror I, a photovoltaic panel, a low-temperature water coil and a storage battery; the Fresnel mirror I is embedded above the photovoltaic panel, the low-temperature water coil is arranged on the back of the photovoltaic panel, the input end of the low-temperature water coil is connected to the water tank, and the output end is connected to the hydrogen production unit; the photovoltaic panel is connected to the storage battery; the hydrogen production unit includes a high-concentration Fresnel mirror solar thermal module, a hydrogen reaction chamber and a mixed gas treatment module, and the high-concentration Fresnel mirror solar thermal module is arranged above the hydrogen reaction chamber; the mixed gas treatment module is connected to the output end of the hydrogen reaction chamber; the hydrogen reaction chamber is composed of a heat collection layer, a water layer I and a hydrogen reaction cavity from the outside to the inside, the high-concentration Fresnel mirror solar thermal module condenses light to the heat collection layer, and the output end of the low-temperature water coil is respectively connected to the input ends of the water layer I and the hydrogen reaction cavity.

2. The dual-cycle coke hydrogen production system based on high-concentration Fresnel mirror condensation according to claim 1, characterized in that, the carbon dioxide and water production unit includes a condensation heating unit and a carbon dioxide collection chamber; a semiconductor condensation heating layer is arranged inside the condensation heating unit, and the semiconductor condensation heating layer divides the condensation heating unit into a condensation chamber and a gasification chamber from top to bottom; the gasification chamber includes a first chamber and a second chamber, the first chamber is communicated with the carbon dioxide collection chamber, and the second chamber is communicated with the water tank.

3. The dual-cycle coke hydrogen production system based on high-concentration Fresnel mirror condensation according to claim 1, characterized in that, the mixed gas treatment module includes a gas cooling unit, a hydrogen and carbon dioxide separation module, a hydrogen collection chamber and a residual gas purification chamber, the gas cooling unit is arranged at the output end of the hydrogen reaction chamber and is connected to the hydrogen and carbon dioxide separation module, the hydrogen separated by the hydrogen and carbon dioxide separation module enters the hydrogen collection chamber, and the separated carbon dioxide enters the carbon dioxide and water production unit; other residual gases enter the residual gas purification chamber.

4. The dual-cycle coke hydrogen production system based on high-concentration Fresnel mirror condensation according to claim 1, characterized in that, The carbon monoxide production unit includes a coke raw material chamber, a carbon monoxide reaction chamber, and a carbon monoxide mixed gas purification and separation chamber connected in sequence; the output end of the carbon monoxide mixed gas purification and separation chamber is connected to the hydrogen reaction chamber.

5. The dual-cycle coke hydrogen production system based on high-concentration Fresnel mirror condensation according to claim 4, characterized in that the carbon monoxide reaction chamber includes a carbon monoxide reaction cavity and a water layer II wrapped outside the carbon monoxide reaction cavity, and the output end of the water layer I is connected to the water layer II.

6. The dual-cycle coke hydrogen production system based on high-concentration Fresnel mirror condensation according to claim 1, characterized in that the auxiliary heating unit includes an electric heating plate I, an electric heating plate II, and an energy storage tank; the electric heating plate I is arranged in the carbon monoxide production unit, the electric heating plate II is arranged in the hydrogen production unit, the storage battery is connected to the electric heating plate I and the electric heating plate II, the input end of the energy storage tank is connected to the carbon monoxide production unit, and the output end is connected to the mixed gas treatment module.

7. The hydrogen production method of the dual-cycle coke hydrogen production system based on high-concentration Fresnel mirror condensation according to claim 1, characterized in that it includes the following steps: S01: The carbon dioxide generated by the carbon dioxide and water production unit enters the carbon monoxide production unit along the conveying direction of the gas pipeline; reacts with the coke inside the carbon monoxide production unit to generate carbon monoxide. S02: The high-temperature water vapor heated in the water pipeline enters the hydrogen reaction chamber and reacts with the carbon monoxide output from the carbon monoxide production unit to generate a mixed gas of hydrogen and carbon dioxide. S03: Separate the mixed gas generated in step S02, collect hydrogen, and input the separated carbon dioxide into the carbon dioxide and water production unit to participate in the next reaction. S04: The unreacted high-temperature water vapor in step S02 is cooled by heat exchange through the auxiliary heating unit and returns to the water tank.

Images