Multi-channel rotating bed type two-step chemical looping combustion hydrogen production and synthesis gas reaction device and use method

Abstract

The invention relates to a multichannel rotating bed type two-step chemical looping combustion hydrogen production and synthesis gas reaction device and a using method, the multichannel rotating bed type two-step chemical looping combustion hydrogen production and synthesis gas reaction device comprises a rotating bed reactor support, a rotating bed reactor, an upper gas inlet chamber and a lower gas outlet chamber, the upper gas inlet chamber is fixedly installed on the rotating bed reactor support, and the lower gas outlet chamber is fixedly installed on the rotating bed reactor support. The rotating bed reactor is connected between the upper gas inlet chamber and the lower gas outlet chamber; the upper gas inlet chamber and the lower gas outlet chamber are respectively provided with four pipe orifices which respectively correspond to gas inlets and gas outlets of the fuel reactor, the steam reforming reactor and the two scavenging transition areas, the interior of the upper gas inlet chamber and the interior of the lower gas outlet chamber are divided into quartered areas through a plurality of partition plates, and the space in a cavity of the rotating bed reactor is divided into four areas; comprising a fuel reactor, a steam reforming reactor and two scavenging transition areas arranged at intervals. According to the invention, the continuous hydrogen production process with zero pollutant discharge and self-sufficient reaction heat is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical looping steam reforming of natural gas for hydrogen production, and in particular, to a multi-channel rotating bed type two-step chemical looping combustion hydrogen production and syngas reaction device and its use method. Background Art

[0002] In recent years, with the continuous increase in the global demand for clean energy and the continuous enhancement of environmental awareness, hydrogen production has become increasingly prominent in the energy field. As an efficient and clean energy carrier, hydrogen can be widely used in fields such as fuel cell vehicles and distributed power generation, reducing the dependence on traditional fossil fuels. And the hydrogen production reaction equipment, as the core component of hydrogen production technology, its performance directly determines the hydrogen production efficiency, cost, and product quality, playing a crucial role in the development of the entire hydrogen production industry.

[0003] Among the structures of many hydrogen production reaction equipment, the fluidized bed reactor is a commonly used one, which consists of an air reactor, a fuel reactor, and a cyclone separator. It has good gas-solid contact and high heat and mass transfer efficiency, but there are problems such as high energy consumption in particle circulation, the need for high-efficiency separation equipment, the influence of bubbles on the reaction, and the easy leakage of unreacted substances when dealing with solid fuels. The moving bed reactor uses a moving bed as the fuel reactor and a fast fluidized bed as the air reactor, with small gas-solid mixing, less product dilution, and high conversion rate. However, the temperature changes unevenly during the particle circulation process, gas leakage is easy to occur, and the control requirements are high. In the fixed bed reactor, oxygen carrier particles are filled in it, and the reaction is carried out by periodically switching the gas feed flow. It has the advantages of easy separation of gas and particles, a compact reactor, and good oxygen utilization, but there are disadvantages such as large temperature fluctuations, easy leakage of fuel during gas switching, and the need for a high-temperature and high-flow gas switching system. Summary of the Invention

[0004] In view of the above-mentioned technical problems, a multi-channel rotating bed type two-step chemical looping combustion hydrogen production and syngas reaction and its use method are provided. The multi-channel structure includes a large number of slender channels, which form a matrix structure, and the inner surfaces of the channels are all coated with oxygen carriers. It combines the advantages of a rotary heat exchanger and a chemical looping combustion device, can avoid gas-solid separation problems, is compact in design and easy to scale up, and can avoid fuel leakage.

[0005] The technical means adopted by the present invention are as follows:

[0006] A multi-channel rotating bed type two-step chemical looping combustion hydrogen production and syngas reaction device, comprising a rotating bed reactor support, a rotating bed reactor, an upper air inlet chamber and a lower exhaust chamber. The upper air inlet chamber is arranged at the upper part of the rotating bed reactor, and the lower exhaust chamber is arranged at the lower part of the rotating bed reactor. The upper air inlet chamber is fixedly installed on the rotating bed reactor support, and the lower exhaust chamber is fixedly installed on the rotating bed reactor support. The rotating bed reactor is connected between the upper air inlet chamber and the lower exhaust chamber;

[0007] Four nozzles are respectively provided on the upper air inlet chamber and the lower exhaust chamber, corresponding to the gas inlets and outlets of the fuel reactor, the steam reforming reactor and two scavenging transition zones. The interior of the upper air inlet chamber and the lower exhaust chamber is divided into four equal parts by several partition plates. The space inside the rotating bed reactor cavity is divided into four regions, including a fuel reactor, a steam reforming reactor and two scavenging transition zones arranged at intervals.

[0008] Furthermore, the rotating bed reactor support comprises a frame structure composed of several columns and crossbeams. The crossbeams include a top crossbeam, a middle support beam and a bottom crossbeam. The bottom of the columns is fixed to the ground through the bottom crossbeam. The top crossbeam is connected to the flange of the upper air inlet chamber, and the middle support beam is connected to the flange of the lower exhaust chamber.

[0009] Furthermore, a heat preservation outer shell is sleeved outside the reaction area of the rotating bed reactor shell.

[0010] Furthermore, the rotating bed reactor is driven by a rotor drive assembly to drive the guide shaft to rotate. Specifically, its power source is a motor arranged below the rotating bed reactor. A worm is provided at the output end of the motor. The rotor drive assembly is provided with a helical gear. Through the helical gear on the rotor drive assembly meshing with it, the guide shaft connected to the rotor drive assembly is driven to rotate, and the rotating bed reactor is driven to rotate through the guide shaft.

[0011] Furthermore, the rotating bed reactor comprises an upper inert channel protection shell, a reaction area heat preservation outer shell, and a lower inert channel protection shell. Among them, for the upper inert channel protection shell, an upper inert channel structure is arranged inside it. The upper inert channel structure is divided into four regions by an upper inert channel partition board, and a first radial sealing assembly is installed below the partition board to ensure that gases do not mix in each partition. Among them, for the lower inert channel protection shell, a lower inert channel structure is arranged inside it. The lower inert channel structure is divided into four regions by a lower inert channel partition board, and a second radial sealing assembly is installed above the partition board to ensure that gases do not mix in each partition. The reaction area channel outer shell has a rotating bed reactor cavity arranged inside it. The space inside the rotating bed reactor cavity is divided into four regions, including a steam reforming reaction area, a fuel reaction area, a first scavenging transition zone and a second scavenging transition zone.

[0012] The present invention also discloses a method for using the above multi-channel rotating bed type two-step chemical looping combustion hydrogen production and syngas reaction device, which includes the following steps:

[0013] Step 1: Introduce preset high-temperature carbon dioxide into the inlet of the purge transition zone to preheat the multi-channel structure inside the cavity;

[0014] Step 2: Start the motor to drive the rotation of the rotor drive assembly, thereby driving the rotation of the rotating bed reactor to homogenize the temperature field in the reactor. At the same time, the temperature in the reactor is monitored in real time. When the temperature in the reactor reaches the lowest reaction temperature, stop the purge of the reactor area;

[0015] Step 3: Start the feeding device to introduce natural gas into the reaction chamber through the fuel reactor inlet. The natural gas reacts chemically with the oxygen carrier on the surface of the multi-channel to generate syngas. The guiding shaft starts to rotate 90° periodically according to the preset residence time, so as to enter the next step;

[0016] Step 4: While maintaining the continuous supply of natural gas, when the reactor completes the first rotation, introduce high-temperature carbon dioxide into the outlet of the first purge transition zone to increase the temperature of this area and blow out the gas remaining in this area in the previous stage. After this operation, the guiding shaft rotates 90° periodically again according to the set residence time and enters the subsequent steps;

[0017] Step 5: Maintain the gas supply state in the previous steps. When the reactor completes the second rotation, introduce water vapor into the reaction chamber through the steam reforming reactor inlet. The reaction starts in this area. The water vapor reacts chemically with the oxygen carrier on the surface of the multi-channel to generate hydrogen, which enters the next chemical looping reaction cycle after being purged by carbon dioxide.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] By designing a scavenging system, the present invention effectively supplements the energy gap that appears during the reaction, ensuring the continuous stability of the reaction process. Scavenging forms a gas isolation zone between the reaction regions, avoiding gas cross-mixing, thereby maintaining the gas purity of each reaction zone and the stability of the reaction conditions, and greatly improving the safety and reliability of the reaction process. The present invention adopts a slender rectangular channel design, enabling the gas flow to have a longer contact time with the wall surface, enhancing the reaction efficiency between the gas flow and the oxygen carrier. This design not only avoids the energy loss caused by bubbles and particle circulation in traditional fluidized beds and moving beds but also achieves more efficient heat transfer and reaction rate. The structure of the slender channel makes the gas flow more uniform during the reaction process, further enhancing the stability of the reaction and the hydrogen production rate. Compared with traditional fluidized bed and moving bed reactors, the device structure of the present invention is simpler and more compact, with a smaller floor area, and can achieve efficient reactions in a more limited space. In the present invention, in order to further improve the sealing and safety of the device, especially in the high-pressure reaction region, the present invention designs an axial and partition sealing structure, effectively reducing the risk of gas leakage and ensuring the stability of the reaction process and the purity of the reaction gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 the description of the embodiments or the prior art. 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.

[0021] Figure 1 It is a three-dimensional structure diagram of the rotating bed reactor in the present invention.

[0022] Figure 2 It is the structure of the upper air inlet cavity and the inert zone in the present invention.

[0023] Figure 3 It is the structure of the reaction zone cavity in the present invention.

[0024] Figure 4 It is the structure of the lower exhaust cavity and the inert zone in the present invention.

[0025] Figure 5 It is the bearing sealing structure in the present invention.

[0026] Figure 6 It is a detailed diagram of the multi-channel structure of the oxygen carrier material in the present invention.

[0027] In the figure: 1 - guiding shaft; 2 - steam reforming reactor inlet; 3 - inlet of the first scavenging transition zone; 4 - inlet of the second scavenging transition zone; 5 - fuel reactor inlet; 6 - upper inlet chamber; 7 - upper inert channel protective housing; 8 - upper inert channel protective outer shell; 9 - first toothless slewing bearing; 10 - rotating bed reactor support; 11 - reaction zone heat preservation outer shell; 12 - second toothless slewing bearing; 13 - lower inert channel heat preservation outer shell; 14 - lower exhaust chamber; 15 - outlet of the first scavenging transition zone; 16 - outlet of the second scavenging transition zone; 17 - syngas outlet; 18 - motor; 19 - rotor drive assembly; 20 - partition plate of the upper inert channel partition; 21 - upper inert channel structure; 22 - first radial seal assembly; 23 - lower inert channel protective housing; 24 - partition plate of the lower inert channel partition; 25 - lower inert channel structure; 26 - second radial seal assembly; 27 - first circumferential seal assembly; 28 - reaction zone channel outer shell; 29 - second circumferential seal assembly; 30 - rotating zone connection disc; 31 - stationary zone connection disc; 32 - inner toothed sealing rubber ring; 33 - outer toothed sealing rubber ring; 34 - steam reforming reaction zone; 35 - first scavenging transition zone; 36 - fuel reaction zone; 37 - second scavenging transition zone; 38 - rotating bed matrix; 39 - oxygen carrier coating. Detailed implementation mode

[0028] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the 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. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] It should be noted that the terms used herein are only for describing the specific implementation mode and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the description. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof in subsequent drawings is not required.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention: the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0033] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0034] In addition, it should be noted that the use of words such as "first", "second" to define components is only for the convenience of differentiating the corresponding components. Without otherwise stating, the above words have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0035] Such as Figures 1 to 6As shown in the figure, an embodiment of the present invention discloses a multi-channel rotating bed type two-step chemical looping combustion hydrogen production and syngas reaction device, which includes a rotating bed reactor support 10, a rotating bed reactor, an upper air inlet chamber 6 and a lower exhaust chamber 14. The upper air inlet chamber 6 is arranged at the upper part of the rotating bed reactor, and the lower exhaust chamber 14 is arranged at the lower part of the rotating bed reactor. The upper air inlet chamber 6 is fixedly installed on the rotating bed reactor support 10, and the lower exhaust chamber 14 is fixedly installed on the rotating bed reactor support 10. The rotating bed reactor is connected between the upper air inlet chamber 6 and the lower exhaust chamber 14;

[0036] In this embodiment, the above-mentioned rotating bed is composed of an upper inert channel structure 21, a middle reaction channel structure, and a lower inert channel structure 25. And each layer of the channel structure has a channel protection outer shell on the outer layer, and there is a heat preservation outer shell outside the outer shell. The main part that rotates in the "rotating bed" referred to in this embodiment is the layer where the middle reaction channel structure is located; as other optional implementation manners, more or fewer layers are divided, as long as any layer including the layer where the middle reaction channel structure is located can be realized, and the rotating bed that completes the rotating function should fall within the protection scope of the present invention.

[0037] Specifically, in this embodiment, the upper air inlet chamber 6 and the upper inert channel protection outer shell 8 are connected by a flange. The upper inert channel protection outer shell 8 and the reaction zone channel outer shell 28 are connected by a first toothless slewing bearing 9, and a first circumferential sealing assembly 27 is installed above the first toothless slewing bearing 9 to ensure that there is no gas leakage in the circumferential direction when the upper structure rotates in the reaction zone. The lower exhaust chamber 14 and the lower inert channel protection outer shell 13 are connected by a flange. The lower inert channel protection outer shell 13 and the reaction zone channel outer shell 28 are connected by a second toothless slewing bearing 12, and a second circumferential sealing assembly 29 is installed below the second toothless slewing bearing 12 to ensure that there is no gas leakage in the circumferential direction when the lower structure rotates in the reaction zone.

[0038] Each of the upper air inlet chamber 6 and the lower exhaust chamber 14 is provided with four pipe orifices, corresponding to the gas inlets and outlets of the steam reforming reaction zone 34, the fuel reaction zone 36, the first scavenging transition zone 35, and the second scavenging transition zone 37 respectively. The interior of the upper air inlet chamber 6 and the lower exhaust chamber 14 is divided into four equal parts by a number of partition plates, including a fuel reactor, a steam reforming reactor, and two spaced scavenging transition zones;

[0039] The rotating bed reactor includes an upper inert channel protection housing 7, a reaction zone heat preservation outer shell 11, and a lower inert channel protection housing 23. Among them, for the upper inert channel protection housing 7, an upper inert channel structure 21 is provided inside it. The upper inert channel structure is divided into four regions by an upper inert channel partition board 20, and a first radial sealing assembly 22 is installed below the partition board to ensure that gases do not mix in each partition; among them, for the lower inert channel protection housing 23, a lower inert channel structure 25 is provided inside it. The lower inert channel structure 25 is divided into four regions by a lower inert channel partition board 24, and a second radial sealing assembly 26 is installed above the partition board to ensure that gases do not mix in each partition; a reaction zone channel outer shell 28, inside which a rotating bed reactor cavity is provided. The space inside the rotating bed reactor cavity is divided into four regions, including a steam reforming reaction zone 34, a fuel reaction zone 36, a first scavenging transition zone 35, and a second scavenging transition zone 37.

[0040] In the present invention, an oxygen carrier is attached inside an elongated rectangular channel, and multiple channels are combined and filled in a cylindrical rotating bed reactor to form an efficient reaction region. By controlling the rotation of the rotating bed reactor, the oxygen carrier is transferred to different reaction regions to achieve a two-step chemical reaction process.

[0041] Specifically, the device includes two main reaction regions. Methane is introduced into one region, and water vapor is introduced into the other region. As the oxygen carrier rotates, the residual gas in the channel may enter the opposite region, resulting in gas mixing and posing a safety risk. To solve this problem, two scavenging regions are provided between the two reaction regions, and CO2 gas is introduced for scavenging to avoid cross-mixing of gases and ensure the safety of the reaction process.

[0042] For the rotating bed reactor, through the periodic continuous rotation of the rotating bed, the oxygen carrier undergoes a chemical looping cycle reaction in each reaction region, thereby realizing the continuous hydrogen production process from natural gas.

[0043] In this embodiment, a first scavenging transition zone inlet 3, a fuel reactor inlet 5, a steam reforming reactor inlet 2, and a second scavenging transition zone inlet 4 are provided on the upper air inlet chamber 6, and a first scavenging transition zone outlet 15, a second scavenging transition zone outlet 16, a syngas outlet 17, and a hydrogen outlet are provided on the lower exhaust chamber 14.

[0044] The rotating bed reactor support includes a frame structure composed of several columns and crossbeams. The crossbeams include a top crossbeam, a middle support beam, and a bottom crossbeam. The bottom of the columns is fixed to the ground through the bottom crossbeam. The top crossbeam is connected to the flange of the upper air inlet chamber, and the middle support beam is connected to the flange of the lower exhaust chamber. Most of the weight of the rotating bed reactor is borne and fixed by the top crossbeam and the middle support beam.

[0045] The heat-insulating outer shell 11 of the reaction zone of the rotating bed reactor shell is used to insulate the reactor from the external environment.

[0046] As an alternative embodiment, the rotating bed reactor is driven by a rotor drive assembly 19 to drive the guide shaft 1 to rotate. Specifically, its power source is a motor 18 arranged below the rotating bed reactor. The output end of the motor is provided with a worm, and through the helical gear on the rotor drive assembly meshing with it, the guide shaft connected to the rotor drive assembly is driven to rotate. By driving the worm to rotate periodically by the motor, the middle reaction pore structure is driven to rotate, so as to realize the seamless switching connection of each reactor area of the rotating bed reactor, and realize the chemical looping reaction of the oxygen carrier on the rotating bed and the continuous and efficient hydrogen production process. A servo motor can be selected for the motor to achieve precise control of the rotation angle of the guide shaft.

[0047] In this embodiment, the outer surface of the rotor drive assembly is provided with a helical gear, and its internal part is provided with a component for installing the bottom or lower part of the guide shaft 1. After the two are assembled, the transmission of the motor torque is realized.

[0048] The above introduction is only an alternative embodiment. In other embodiments, a mechanical transmission structure that can directly or indirectly drive the guide rod to rotate by a power source should also fall within the protection scope of the present invention.

[0049] After the reaction zone between the upper inert pore structure 21 and the lower inert pore structure 25 is separated by a partition, through holes for assembling the upper and lower ends of the guide shaft are provided in the central regions of the upper inert pore structure 21 and the lower inert pore structure 25. As Figure 3 shown, in this embodiment, the position where the middle of the guide shaft contacts the reaction zone pore is set as a hexagonal prism protruding from the upper circular pipe diameter and the lower circular pipe diameter. The diameters of the upper circular pipe diameter and the lower circular pipe diameter are slightly smaller than the through holes provided in the middle position between the upper and lower inert zones, and bearings are provided at the contact positions. The central position of the middle reaction pore structure is a hexagonal hole adapted to the hexagonal prism, realizing the effect that the upper and lower inert zones are stationary and the middle reaction zone rotates.

[0050] Circumferential sealing components are provided at the contact positions between the bearings and the stationary cavity. The circumferential sealing components are formed by the upper and lower buckling of a rotating zone connection disk 30 and a stationary zone connection disk 31. An inward toothed sealing ring 32 is provided inside the rotating zone connection disk 30, and an outward toothed sealing rubber ring 33 is provided outside the stationary zone connection disk 31. After installation, the tooth parts of the two rubber rings face each other to form a sealing effect.

[0051] The steam reforming reaction zone, the first scavenging transition zone, the fuel reaction zone, and the second scavenging transition zone are provided with a multi-channel structure. The multi-channel structure includes a large number of slender channels, which form a matrix structure, and the inner surfaces of the channels are coated with an oxygen carrier. The oxygen carrier material channel layer is composed of a honeycomb ceramic block with a large number of micro-channels, serving as the rotating bed matrix 38. The inner wall surface of the channel is coated with a carrier using Al2O3 and MgAl2O4 as the oxygen carrier coating 39, and a catalyst coating of metal oxide oxygen carrier (Me x O y ) is distributed on the carrier. Among them, the oxygen carrier usually adopts transition metal oxides (such as NiO, Fe2O3, CuO, MnO2) or composite metal oxides (such as perovskite-type La 1-x Sr x FeO3), which can be reasonably selected according to production requirements. This invention patent does not make a clear limitation on this.

[0052] By calculating the reaction rates in each reactor region and reasonably designing the area of the fan-shaped reactor region, the sufficiency and efficiency of the chemical looping reaction of the oxygen carrier in each reactor region can be ensured. In addition, in this invention, carbon dioxide is used as the scavenging working medium, which can not only scavenge the miscellaneous gas in the rotating bed micro-channel region but also remove the carbon deposition phenomenon generated due to the incomplete oxidation of natural gas in the channel, reduce the temperature fluctuation in the reactor, avoid the sintering of the oxygen carrier catalyst, and effectively extend the cycle service life of the oxygen carrier.

[0053] Specifically, the processes carried out during the actual operation of this rotating bed reactor include:

[0054] The partial oxidation process of natural gas in the fuel reactor is as follows:

[0055] Under the action of the catalyst and at a high temperature of 800 - 1000 °C, the following chemical reactions mainly occur in the fuel reactor:

[0056] CH4 + Me x O y →CO + H2 + Me x O y-a

[0057] This reaction is an endothermic reaction, and the required heat is provided by the high-temperature carbon dioxide entering from the outlet of the first scavenging transition zone. Natural gas enters the oxygen carrier material channel layer from the fuel reactor inlet in the upper intake chamber and contacts the oxygen carrier wall surface to react. The syngas composed of carbon monoxide and hydrogen generated by the reaction leaves the reactor through the syngas outlet in the lower exhaust chamber.

[0058] The steam reforming process for hydrogen production in the steam reforming reactor is as follows:

[0059] Under the action of a catalyst and a high temperature of 800 - 1000 °C, the following chemical reactions mainly occur in the steam reforming reactor:

[0060] H2O + Me x O y-a →H2 + Me x O y

[0061] This reaction is a slightly exothermic reaction. Water vapor enters the oxygen carrier material channel layer from the steam reforming reactor inlet in the upper air inlet chamber and reacts with the oxygen carrier wall. The hydrogen generated by the reaction leaves the reactor through the hydrogen outlet in the lower exhaust chamber.

[0062] The carbon dioxide scavenging process in the scavenging transition zone is as follows:

[0063] Carbon dioxide enters the oxygen carrier material channel layer from the first scavenging transition zone inlet and the second scavenging transition zone inlet in the upper air inlet chamber. Through carbon dioxide scavenging, the residual gas in the previous reaction area is taken away from the reactor through the first scavenging transition zone outlet and the second scavenging transition zone outlet in the lower exhaust chamber, preventing the adverse effects caused by gas cross - over in adjacent reaction zones. At the same time, carbon dioxide scavenging provides a uniform and stable heat supply for the reactor, removes the carbon deposition on the oxygen carrier wall due to incomplete oxidation of natural gas, and reduces the sintering of the oxygen carrier caused by local high temperature in the reactor, effectively extending the cycle life of the oxygen carrier.

[0064] The present invention also discloses a use method of the above - mentioned multi - channel rotating bed - type two - step chemical looping combustion for hydrogen production and syngas reaction, including the following steps:

[0065] Step 1: Introduce high - temperature carbon dioxide into the scavenging transition zone inlet to preheat the multi - channel structure inside the cavity, creating suitable temperature conditions for subsequent reactions.

[0066] Step 2: Start the motor to drive the rotor drive assembly to rotate. The rotor drive assembly drives the guide shaft to rotate, and then drives the middle - layer reaction pore structure to rotate at a uniform and slow speed. During this process, continuously monitor the cavity temperature until the temperature of the entire cavity reaches a uniform state and meets the reaction temperature standard. After the temperature reaches the standard, stop introducing high - temperature carbon dioxide.

[0067] Step 3. When it rotates by a certain angle, i.e., the predetermined original calibration 0°, and the middle reaction channel structure is completely and tightly combined with the upper inert channel structure 21 and the lower inert channel structure 25, stop the rotation operation of the reactor. At this time, introduce natural gas into the reaction chamber through the fuel reactor inlet, and the reaction will start in this area immediately. The natural gas reacts chemically with the oxygen carrier on the multi-channel surface to generate syngas. At the same time, the guide shaft starts to rotate 90° periodically according to the preset residence time, thus entering the next step.

[0068] Step 4. While maintaining the continuous supply of natural gas, when the reactor completes the first rotation, introduce high-temperature carbon dioxide into the outlet of the first purge transition zone. The purpose of this operation is to increase the temperature of this area and blow out the gas remaining in this area in the previous stage. After completing this operation, the guide shaft rotates 90° periodically again according to the set residence time and enters the subsequent steps.

[0069] Step 5. Maintain the gas supply state in the previous steps. When the reactor completes the second rotation, introduce water vapor into the reaction chamber through the steam reforming reactor inlet, and the reaction starts in this area. The water vapor reacts chemically with the oxygen carrier on the multi-channel surface to generate hydrogen. So far, the entire reaction process has been fully started, and the guide shaft continuously rotates 90° periodically according to the set residence time to continuously generate hydrogen and the mixed gas.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-channel rotating bed type two-step chemical looping combustion hydrogen production and syngas reaction device, characterized in that, It includes a rotating bed reactor support, a rotating bed reactor, an upper air inlet chamber and a lower exhaust chamber. The upper air inlet chamber is arranged at the upper part of the rotating bed reactor, and the lower exhaust chamber is arranged at the lower part of the rotating bed reactor. The upper air inlet chamber is fixedly installed on the rotating bed reactor support, and the lower exhaust chamber is fixedly installed on the rotating bed reactor support. The rotating bed reactor is connected between the upper air inlet chamber and the lower exhaust chamber; Four nozzles are provided on each of the upper air inlet chamber and the lower exhaust chamber, corresponding to the gas inlets and outlets of the fuel reactor, the steam reforming reactor and two scavenging transition zones respectively. The interior of the upper air inlet chamber and the lower exhaust chamber is divided into four equal regions by a number of partition plates. The space inside the rotating bed reactor cavity is divided into four regions, including a fuel reactor, a steam reforming reactor and two scavenging transition zones arranged at intervals.

2. The multi-channel rotary bed type two-step chemical looping combustion hydrogen production and syngas reaction device according to claim 1, wherein The rotating bed reactor support includes a frame structure composed of a number of columns and cross beams. The cross beams include a top cross beam, a middle support beam and a bottom cross beam. The bottom of the columns is fixed to the ground through the bottom cross beam. The top cross beam is connected to the flange of the upper air inlet chamber, and the middle support beam is connected to the flange of the lower exhaust chamber.

3. The multi-channel rotating bed type two-step chemical looping combustion hydrogen production and syngas reaction device according to claim 1, characterized in that, A heat preservation outer shell is sleeved outside the reaction zone of the rotating bed reactor shell.

4. The multi-channel rotary bed type two-step chemical looping combustion hydrogen production and syngas reaction device according to claim 1, characterized in that, The rotation of the rotating bed reactor is realized through a worm and worm gear mechanism. Specifically, its power source is a motor arranged below the rotating bed reactor. A worm is provided at the output end of the motor. The worm drives a helical gear on the rotor drive assembly, driving the guide shaft connected to the rotor drive assembly to rotate, and driving the rotating bed reactor to rotate through the guide shaft.

5. The multi-channel rotating bed type two-step chemical looping combustion hydrogen production and syngas reaction device according to claim 1, wherein, The rotating bed reactor includes an upper inert channel protection shell, a reaction zone heat preservation outer shell, and a lower inert channel protection shell; Among them, for the upper inert channel protection shell, an upper inert channel structure is provided inside it. The upper inert channel structure is divided into four regions by an upper inert channel partition board, and a first radial sealing assembly is installed below the partition board to ensure that gases do not mix in each partition; Among them, for the lower inert channel protection shell, a lower inert channel structure is provided inside it. The lower inert channel structure is divided into four regions by a lower inert channel partition board, and a second radial sealing assembly is installed above the partition board to ensure that gases do not mix in each partition; The reaction zone channel outer shell has a rotating bed reactor cavity arranged inside it. The space inside the rotating bed reactor cavity is divided into four regions, including a steam reforming reaction zone, a fuel reaction zone, a first scavenging transition zone and a second scavenging transition zone.

6. A method for using a multi-channel rotating bed type two-step chemical looping combustion hydrogen production and syngas reaction device according to any one of claims 1 to 5, characterized in that, It includes the following steps: Step 1: Introduce preset high-temperature carbon dioxide into the scavenging transition zone air inlet to preheat the multi-channel structure inside the cavity; Step 2: Start the motor to drive the rotor drive assembly to rotate, and then drive the rotating bed reactor to rotate to make the temperature field inside the reactor uniform. At the same time, monitor the temperature inside the reactor in real time. When the temperature inside the reactor reaches the lowest reaction temperature, stop the scavenging of the reactor area; Step 3: Start the feeding device to introduce natural gas into the reaction chamber through the fuel reactor air inlet. The natural gas reacts chemically with the oxygen carrier on the surface of the multi-channel to generate syngas. The guide shaft starts to rotate 90° in a periodic manner according to the preset residence time, and thus enters the next step; Step 4, while maintaining the continuous supply of natural gas, after the reactor completes the first rotation, introduce high-temperature carbon dioxide into the outlet of the first purge transition zone to increase the temperature of this area and blow out the gas remaining in this area from the previous stage. After completing this operation, the guide shaft rotates 90° periodically again according to the set residence time and enters the subsequent steps; Step 5, maintain the gas supply state in the previous steps. After the reactor completes the second rotation, introduce water vapor into the reaction chamber through the inlet of the steam reforming reactor, and the reaction starts in this area. The water vapor chemically reacts with the oxygen carrier on the multi-channel surface to generate hydrogen, which enters the next chemical looping reaction cycle after being purged by carbon dioxide.

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