Device and method for catalytically converting carbon dioxide into high-value chemicals

Abstract

The invention discloses a device and a method for catalytically converting high-value chemicals from carbon dioxide. A fluidized bed reactor is vertically arranged in an electric heating furnace, and solid catalyst particles are filled in the fluidized bed reactor; the upper part of the fluidized bed reactor is respectively connected with a charging hopper and a condenser through guide pipes; a rotational flow plate, an air distribution plate and a conical funnel are arranged below the fluidized bed reactor, the conical funnel is respectively connected with a gas inlet pipe, a waste collecting tank and an N2 gas tank through guide pipes, CO2 flue gas and H2 are mixed and preheated and then are introduced into solid catalyst particles in the fluidized bed reactor to be heated and pressurized, and under the action of a catalyst, the CO2 flue gas and H2 are mixed and preheated; high-value chemicals such as oxygen-containing compounds such as methanol and hydrocarbons such as low-carbon olefins are generated; the conversion method is high in reaction rate, high in reaction efficiency and large in product generation amount, gas circulation is achieved in the reactor, the raw material utilization rate and the energy efficiency of the whole reaction system can be effectively improved, and the method is suitable for large-scale industrial application of devices for catalytic conversion of high-value chemicals through carbon dioxide.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon dioxide utilization, and particularly relates to a device and a method for catalytic conversion of carbon dioxide into high-value chemicals. Background Art

[0002] CO2 capture, utilization and storage (referred to as CCUS) technology is currently the main technical means to slow down climate deterioration, significantly reduce CO2 emissions and achieve sustainable development, and is a greenhouse gas solution with great potential and high effectiveness in the next few decades. Among them, converting the captured CO2 into high-value chemicals and fuels to realize the resource utilization of CO2 is an important carbon emission reduction technology and is of great significance for alleviating the energy crisis.

[0003] Due to the high thermal stability of CO2, its dissociation requires extremely high temperatures. The current chemical utilization of CO2 mainly focuses on catalytic hydrogenation of CO2 to oxygen-containing compounds such as methanol and hydrocarbon compounds such as light olefins and other high-value chemicals, CO2 to syngas, CO2 synthesis of carbonates and carboxylic acids, etc. The main disadvantages of these processes are that the utilization rate of the catalyst in traditional fixed-bed reactors is not high, and high conversion of raw materials and high selectivity of products cannot be guaranteed simultaneously in a single-pass reaction. Moreover, the catalyst is prone to deactivation under high-temperature and high-pressure reaction conditions, resulting in a decline in equipment performance. How to improve the gas-solid reaction performance in the reactor by changing the gas flow state is also a difficult problem. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and a method for catalytic conversion of carbon dioxide into high-value chemicals to overcome the technical problems of low utilization rate of the catalyst, low raw material conversion rate and low energy utilization efficiency in traditional fixed-bed reactors.

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] A device for catalytic conversion of carbon dioxide into high-value chemicals includes a fluidized bed reactor. A sealed heating mechanism is arranged outside the fluidized bed reactor. A feeding mechanism is connected to the upper end of the fluidized bed reactor. A gas distribution plate is installed at the lower end of the fluidized bed reactor, and a conical gas distributor is connected to the lower side of the gas distribution plate;

[0007] The gas distribution plate and the conical gas distributor are both provided with air inlets. The air inlet of the conical gas distributor is connected to a waste collection tank and an N2 gas tank through a conduit. An inlet pipe is connected to the air inlet of the conical gas distributor, and a CO2 flue gas source inlet pipeline and a hydrogen source inlet pipeline are connected to the inlet pipe;

[0008] Inside the fluidized bed reactor, a cyclone separator, solid catalyst particles and a swirl plate are provided. The cyclone separator is arranged at the top of the fluidized bed reactor. The solid catalyst particles are arranged above the swirl plate, and the swirl plate is placed on the air distribution plate.

[0009] The cyclone separator is connected to the intake port of an exhaust pipe, and the outlet of the exhaust pipe is connected to a condenser. The outlet end of the condenser is respectively connected to a gas collector and a CO2 analyzer.

[0010] A reflux pipe is also led out from the exhaust pipe, and the outlet of the reflux pipe is connected to the intake hole on the conical air distribution hopper.

[0011] Furthermore, a refractory layer is provided between the sealed heating mechanism and the fluidized bed reactor.

[0012] Furthermore, the sealed heating mechanism is an electric heating furnace, and sealing covers and sealing buckles are respectively installed at the upper and lower ends of the electric heating furnace.

[0013] Furthermore, a pressure gauge and an intelligent temperature control sensor are installed on the inner wall of the fluidized bed reactor.

[0014] Furthermore, a mixing preheater is installed on the intake pipe.

[0015] Furthermore, the CO2 flue gas source intake pipeline includes a CO2 flue gas source. The CO2 flue gas source and the intake pipe are connected through a first intake pipe, and a ball valve, a filter, a flow controller and a check valve are installed on the first intake pipe.

[0016] The hydrogen source intake pipeline includes a hydrogen source. The CO2 flue gas source and the intake pipe are connected through a second intake pipe, and a ball valve, a filter, a flow controller and a check valve are installed on the second intake pipe.

[0017] Furthermore, the outlet end of the condenser is connected to an exhaust pipe. The exhaust pipe is connected to the gas collector through a first exhaust branch pipe, and the exhaust pipe is connected to the CO2 analyzer through a second exhaust branch pipe.

[0018] Furthermore, a filter and a back pressure valve are installed on the exhaust pipe, and a pressure reducing valve is installed on the second exhaust branch pipe.

[0019] Furthermore, electric stop valves are provided at the feeding mechanism, the waste collection tank and the N2 gas tank.

[0020] A compressor (41) is installed on the reflux pipe (39).

[0021] Second, a method for catalytic conversion of carbon dioxide into high-value chemicals is provided, including the following steps:

[0022] The solid catalyst particles are introduced into the fluidized bed reactor through the feeding mechanism.

[0023] The intake holes on the conical gas distributor receive the reaction gases provided by the CO2 flue gas source inlet pipeline and the hydrogen source inlet pipeline;

[0024] The reaction gases pass through the air distribution plate and the swirl plate and then enter the fluidized bed reactor to react with the solid catalyst particles. N2 is blown into the lower end of the fluidized bed reactor from the N2 gas tank through a conduit, causing the solid catalyst particles to move in suspension in the fluidized bed reactor and isolating the reaction from air. During the reaction process, it is sealed and heated by a sealing heating mechanism;

[0025] The cyclone separator separates the reacted gases and catalyst particles in the fluidized bed reactor. The unexpired solid catalyst particles return to the inside of the reactor to participate in the reaction again, and the expired solid catalyst particles are discharged into the waste collection tank;

[0026] Part of the reacted gases enter the conical gas distributor through the reflux pipe, mix with the fresh reaction gases, and then enter the fluidized bed reactor again. The remaining reacted gases flow through the condenser through the exhaust pipe. The gas products flow into the CO2 analyzer and the gas collector respectively, and the liquid products are collected through the condenser.

[0027] Compared with the prior art, the present invention has the following beneficial technical effects:

[0028] The present invention provides a device for catalytic conversion of carbon dioxide into high-value chemicals, including a fluidized bed reactor arranged in a sealing heating mechanism. The upper part of the fluidized bed reactor is connected to a feeding mechanism and a condenser respectively through conduits, and a lower part is provided with an air distribution plate and a conical funnel. Inside the fluidized bed reactor, there are solid catalyst particles, a swirl plate and a cyclone separator. The conical funnel is connected to an inlet pipe, a waste collection tank and an N2 gas tank respectively through conduits. The present invention adopts a fluidized bed reactor with an internal cyclone separator, which has a large internal capacity, the reactants can be continuously added, and it can effectively prevent the loss of the catalyst and extend the catalyst life; the unreacted gases are re-introduced into the reactor for reaction through the reflux pipe, realizing the gas circulation in the system, effectively improving the utilization rate of raw materials, and the heat carried by the gases can also be recycled, thereby improving the energy efficiency of the whole system.

[0029] Preferably, the sealing heating mechanism is an electric heating furnace. The electric heating furnace is used to heat the fluidized bed reactor. The electric heating furnace has a small equipment volume, flexible installation, and high thermal efficiency. It can be used in conjunction with an intelligent temperature control sensor installed on the side wall of the fluidized bed reactor to accurately control the temperature of the reactor.

[0030] Preferably, holes are opened on the air distribution plate, the hole layout of the air distribution plate is optimized, and a swirl plate is arranged inside the reactor to increase the contact time between gas and solid and reduce the axial backmixing of gas, effectively improving the gas distribution and channeling phenomenon inside the reactor, thereby significantly improving the reaction performance of the reactor.

[0031] Preferably, a swirl plate is arranged above the air distribution plate, which can enable the mixed gas of reactants CO2 and H2 and solid catalyst particles to flow suspended inside the fluidized bed reactor and fully mix and react.

[0032] Preferably, the gas outlet end of the condenser is connected to a CO2 analyzer through a second exhaust pipe. By analyzing the CO2 concentration in the product gas through the CO2 analyzer, the reaction degree can be further known.

[0033] The present invention provides a method for catalytic conversion of carbon dioxide into high-value chemicals. After preheating the mixture of CO2 flue gas and H2 and introducing it into the solid catalyst particles in the fluidized bed reactor, heating and pressurizing are carried out. Under the action of the catalyst, high-value chemicals such as oxygen-containing compounds like methanol and hydrocarbon compounds like light olefins are generated. This conversion method has a fast reaction rate, high reaction efficiency, and a large amount of product generation. Gas circulation is achieved inside the reactor, which can effectively improve the raw material utilization rate and the energy efficiency of the entire reaction system. At the same time, automatic feeding and discharging can be realized, and it is suitable for large-scale industrial application of carbon dioxide catalytic conversion of high-value chemical devices.

[0034] Preferably, the present invention adopts a control method of controlling the on-off of the electric stop valve through a control cabinet to realize the automatic feeding and discharging of the device, ensuring that the device can work effectively for a long time under a high reaction rate and a low maintenance cost. Description of the Drawings

[0035] Figure 1 It is a structural diagram of a device for catalytic conversion of carbon dioxide into high-value chemicals in an embodiment of the present invention;

[0036] Figure 2 It is a top view of the air distribution plate in an embodiment of the present invention;

[0037] Figure 3 It is a schematic structural diagram of a conical air distributor in an embodiment of the present invention;

[0038] Figure 4 It is a schematic structural diagram of a swirl plate in an embodiment of the present invention;

[0039] Figure 5 It is a process flow diagram of a method for catalytic conversion of carbon dioxide into high-value chemicals in an embodiment of the present invention.

[0040] In the figure, 1 is the CO2 flue gas source; 2 is the hydrogen source; 3 is the ball valve; 4 is the filter; 5 is the flow controller; 6 is the check valve; 7 is the mixing preheater; 8 is the sealing cover; 9 is the sealing buckle; 10 is the electric heating furnace; 11 is the pressure gauge; 12 is the intelligent temperature control sensor; 13 is the solid catalyst particles; 14 is the fluidized bed reactor; 15 is the air distribution plate; 16 is the conical air distributor; 17 is the first electric stop valve; 18 is the feeding hopper; 19 is the second electric stop valve; 20 is the first exhaust pipe; 21 is the pressure reducing valve; 22 is the condenser; 23 is the back pressure valve; 24 is the CO2 analyzer; 25 is the third electric stop valve; 26 is the waste collection tank; 27 is the fourth electric stop valve; 28 is the N2 gas tank; 29 is the gas collector; 30 is the inlet pipe; 31 is the first intake branch pipe; 32 is the second intake branch pipe; 33 is the second exhaust pipe; 34 is the first exhaust branch pipe; 35 is the second exhaust branch pipe; 36 is the refractory layer; 37 is the swirl plate; 38 is the cyclone separator; 39 is the return pipe; 40 is the control cabinet; 41 is the compressor. Detailed implementation manners

[0041] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer and more understandable, the following specific embodiments are used to further elaborate on the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] 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 accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0045] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and defined, if the terms "set", "installed", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] A device for catalytically converting carbon dioxide into high-value chemicals, as Figure 1 shown, includes a sealed heating mechanism, a fluidized bed reactor 14 vertically placed in the sealed heating mechanism, and solid catalyst particles 13 are contained in the closed fluidized bed reactor 14; a distributor plate 15 and a conical gas distributor 16 are provided below the fluidized bed reactor 14, which are connected to a waste collection tank 26 and an N2 gas tank 28 through a conduit, and the air is isolated by the method of N2 pressurization; the conical gas distributor 16 is covered with small holes and is connected to a CO2 flue gas source inlet pipeline and a hydrogen source inlet pipeline through an inlet pipe 30; a cyclone separator 38 is arranged inside the fluidized bed reactor 14 and is connected to a condenser 22 through a first exhaust pipe 20, and a return pipe 39 led out from the first exhaust pipe 20 is connected to the conical gas distributor 16; a swirl plate 37 is horizontally arranged inside the fluidized bed reactor 14, and the swirl plate 37 is arranged above the distributor plate 15; the exhaust pipe on one side of the condenser 22 is respectively connected to a gas collector 29 and a CO2 analyzer 24; the reactant CO2 and H2 mixed gas and the solid catalyst particles 13 are suspended and flow inside the fluidized bed reactor 14, and are fully mixed and reacted.

[0047] Specifically, the sealed heating mechanism is an electric heating furnace 10, and sealed covers 8 and sealed buckles 9 are respectively installed at the upper and lower ends of the electric heating furnace 10. A refractory layer 36 is provided between the outer wall of the fluidized bed reactor 14 and the inner wall of the electric heating furnace 10. The material of the refractory layer 36 can be phosphate refractory, silicon carbide refractory, corundum refractory or silicon nitride bonded silicon carbide products, etc. The side wall of the fluidized bed reactor 14 is connected with a pressure gauge 11 and an intelligent temperature control sensor 12 through wires;

[0048] The CO2 flue gas source inlet pipeline connected to the inlet pipe 30 includes a CO2 flue gas source 1 and a first inlet pipe 31, and a ball valve 3, a filter 4, a flow controller 5 and a check valve 6 are installed on the first inlet pipe 31; the hydrogen source inlet pipeline connected to the inlet pipe 30 includes a hydrogen source 1 and a second inlet pipe 32, and a ball valve 3, a filter 4, a flow controller 5 and a check valve 6 are installed on the second inlet pipe 32;

[0049] The inlet of the condenser 22 is connected to the first exhaust pipe 20. After the second exhaust pipe 33 at the outlet passes through the filter 4 and the back pressure valve 23, it is divided into a first exhaust branch pipe 34 and a second exhaust branch pipe 35 and is respectively connected to the gas collector 29 and the CO2 analyzer 24;

[0050] The cyclone separator 38 is a single-cylinder tangential inlet structure resistant to high temperature and high pressure. As Figure 4 shown, the swirl plate 37 is a circular disc-shaped structure with a central hole. The air distribution plate 15 is circular in shape, with a hole in the middle and is connected to the conduit; a plurality of small holes with the same size and evenly distributed are opened around the middle hole of the air distribution plate 15, and the side wall of the conical air distributor 16 is provided with holes;

[0051] In an embodiment of the present invention, a device for catalytically converting carbon dioxide into high-value chemicals mainly includes a CO2 flue gas source 1, a hydrogen source 2, an N2 gas tank 28, a flow controller 5, a mixing preheater 7, an electric heating furnace 10, a fluidized bed reactor 14, a feeding funnel 18, a back pressure valve 23, a pressure reducing valve 21, a CO2 analyzer 24, a waste collection tank 26, a condenser 22, a process pipeline and a control cabinet 40. The CO2 flue gas source 1, the hydrogen source 2, and the flow controller 5 are respectively connected to the mixing preheater 7 through a first intake branch pipe 31 and a second intake branch pipe 32. The mixing preheater 7, the condenser 22, the feeding funnel 18, the waste collection tank 26, and the N2 gas tank 28 are respectively connected to the fluidized bed reactor 14 through an intake pipe 30, an exhaust pipe 20, and a conduit. The upper and lower ends of the electric heating furnace 10 are equipped with a sealing cover 8 and a sealing buckle 9; two holes are opened in the upper sealing cover of the electric heating furnace 10, and are respectively connected to the feeding funnel 18 and the condenser 22 through a conduit and an exhaust pipe 20. One hole is opened at the lower end of the electric heating furnace 10, and the lower end of the fluidized bed reactor 14 is fixed on the hole wall; the fluidized bed reactor 14 is vertically placed in the electric heating furnace 10. A cyclone separator 38 and a swirl plate 37 are arranged inside the fluidized bed reactor. There is a refractory layer 36 between the outer wall of the fluidized bed reactor 14 and the inner wall of the electric heating furnace 10. Solid catalyst particles 13 are filled in the fluidized bed reactor 14.

[0052] The side wall of the fluidized bed reactor 14 is respectively provided with a pressure gauge 11 and an intelligent temperature control sensor 12, which are connected by wires; a air distribution plate 15 and a conical air distributor 16 are arranged below the fluidized bed reactor 14, and are connected to the waste collection tank 26 and the N2 gas tank 28 through a conduit; the conical air distributor 16 is covered with small holes and is connected to the mixing preheater 7 through an intake pipe 30.

[0053] The solid catalyst particles 13 are made of copper-zinc-aluminum alloy, in which copper is 60%, zinc is 30%, and aluminum is 10%; the upper and lower ends of the electric heating furnace 10 are equipped with a sealing cover 8 and a sealing buckle 9 for sealing the fluidized bed reactor 14; the materials of the fluidized bed reactor 14 and the sealing cover 8 are both made of 316L stainless steel and are fixed by a sealing buckle 9.

[0054] The solid catalyst particles 13 enter the fluidized bed reactor 14 through the feeding hopper 18; an annular rubber tube is wrapped around the outer wall of the conical gas distributor 16, and the mixed gas of CO2 and H2 passes through the small holes on the outside of the conical gas distributor 16 and enters the partition gas chamber, and then enters the fluidized bed reactor 14 through the holes on the air distribution plate 15.

[0055] Figure 2 It is a top view of the air distribution plate 15. The air distribution plate 15 is circular in shape, with a hole in the middle, which is connected to the conduit; there are 2 rows of holes outside the middle hole of the air distribution plate 15, 11 on the inner side and 16 on the outer side, with the same size and uniform distribution.

[0056] Figure 3 It is a structural schematic diagram of the conical gas distributor 16. The number of rows of holes on the side wall of the conical gas distributor 16: 10 - 20; the number of holes in each row: 8 - 20; the hole diameter: 0.5 - 1.0 cm.

[0057] A second electric stop valve 19 is installed on the conduit at the outlet of the feeding hopper 18, a first electric stop valve 17 is installed at the air inlet of the conical gas distributor 16, a third electric stop valve 25 is installed at the inlet of the waste collection tank 26, and a fourth electric stop valve 27 is installed at the outlet of the N2 gas tank 26. The above-mentioned electric stop valves are all connected to the control cabinet 40.

[0058] The present invention also provides a method for catalytic conversion of carbon dioxide into high-value chemicals, such as Figure 4 shown, including the following steps:

[0059] The solid catalyst particles 13 are introduced into the fluidized bed reactor 14 through the feeding mechanism;

[0060] The intake holes on the conical gas distributor 16 receive the reaction gases provided by the CO2 flue gas source inlet pipe and the hydrogen source inlet pipe;

[0061] The reaction gases pass through the air distribution plate 15 and the cyclone plate 37 and then enter the fluidized bed reactor 14 to react with the solid catalyst particles 13. N2 is blown into the fluidized bed reactor 14 from the lower end through the conduit by the N2 gas tank 28, so that the solid catalyst particles 13 move in suspension in the fluidized bed reactor 14, and the reaction is isolated from the air. During the reaction process, it is sealed and heated by the sealing heating mechanism;

[0062] The cyclone separator 38 separates the reacted gases and catalyst particles in the fluidized bed reactor 14. The un-deactivated solid catalyst particles 13 return to the inside of the reactor to participate in the reaction again, and the deactivated solid catalyst particles 13 are discharged into the waste collection tank 26;

[0063] After partial reaction, the gas is led out from the exhaust pipe 20 and enters the reflux pipe 39. After being pressurized by the compressor 41 on the reflux pipe 39, it enters the conical gas distributor 16, mixes with the fresh reaction gas, and then enters the fluidized bed reactor 14 again. The remaining reacted gas flows through the condenser 22 through the first exhaust pipe 20. The gas product flows into the CO2 analyzer 24 and the gas collector 29 respectively through the second exhaust pipe 33, and the liquid product is collected through the condenser 22.

[0064] Specifically, the specific steps of the above control method are as follows:

[0065] 1. Close the first electric stop valve 17, the fourth electric stop valve 27 and the third electric stop valve 25, open the second electric stop valve 19, and add a certain amount of solid catalyst particles 13 into the fluidized bed reactor 14 through the feeding funnel 18.

[0066] 2. Close the second electric stop valve 19 and the third electric stop valve 25, open the first electric stop valve 17 and the fourth electric stop valve 27, open the N2 valve, and make N2 in the N2 gas tank 28 enter the fluidized bed reactor 14 through the conduit at a certain flow rate (greater than the critical fluidization velocity), so that the solid catalyst particles 13 in the fluidized bed reactor 14 are suspended and flow. According to the pressure gauge 11 on the side wall of the fluidized bed reactor 14, control the pressure in the reactor between 1 - 10 MPa.

[0067] 3. Turn on the electric heating furnace 10 to increase the temperature in the fluidized bed reactor 14, and control the temperature between 200 - 400 °C.

[0068] 4. After passing the CO2 flue gas from the CO2 flue gas source 1 and H2 from the hydrogen source 2 through the mixing preheater 7, pass them into the solid catalyst particles 13 in the fluidized bed reactor 14 at a certain flow rate through the inlet pipe 30.

[0069] 5. Make the CO2 and H2 mixed gas in the fluidized bed reactor 14 react with the solid catalyst particles 13 under constant temperature and pressure to obtain high-value chemicals such as oxygen-containing compounds like methanol and hydrocarbon compounds like light olefins.

[0070] 6. When the reaction ends or the CO2 analyzer 24 detects a high CO2 concentration, discharge the material. Close the second electric stop valve 19 and the fourth electric stop valve 27, open the first electric stop valve 17 and the third electric stop valve 25, and the catalyst waste is introduced into the waste collection tank 26 through the bottom conduit of the fluidized bed reactor 14. The upper end of the fluidized bed reactor 14 is connected to the condenser 22 through the first exhaust pipe 20, and the reacted gas is liquefied to form a liquid product in the condenser 22 and collected; after the upper end of the condenser 22 is connected to the second exhaust pipe 33, it is respectively connected to the gas collector 29 through the first exhaust branch pipe 34 and connected to the CO2 analyzer 24 through the second exhaust branch pipe 35 to measure the CO2 concentration at the outlet.

[0071] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. An apparatus for catalytic conversion of carbon dioxide into high-value chemicals, characterized in that, It includes a fluidized bed reactor (14), and a sealed heating mechanism is provided outside the fluidized bed reactor (14). A feeding mechanism is connected to the upper end of the fluidized bed reactor (14), and a gas distribution plate (15) is installed at the lower end of the fluidized bed reactor (14). A conical gas distributor (16) is connected to the lower side of the gas distribution plate (15); Both the gas distribution plate (15) and the conical gas distributor (16) are provided with air inlet holes. The air inlet of the conical gas distributor (16) is connected to a waste collection tank (26) and an N2 gas tank (28) through a conduit. An inlet pipe (30) is connected to the air inlet hole of the conical gas distributor (16), and a CO2 flue gas source inlet pipeline and a hydrogen source inlet pipeline are connected to the inlet pipe (30); A cyclone separator (38), solid catalyst particles (13) and a swirl plate (37) are arranged inside the fluidized bed reactor (14). The cyclone separator (38) is arranged at the top of the fluidized bed reactor (14), the solid catalyst particles (13) are arranged above the swirl plate (37), and the swirl plate (37) is placed on the gas distribution plate (15); The cyclone separator (38) is connected to the air inlet of a first exhaust pipe (20), and the outlet of the first exhaust pipe (20) is connected to a condenser (22). The outlet end of the condenser (22) is connected to a gas collector (29) and a CO2 analyzer (24) respectively through a second exhaust pipe (33); A return pipe (39) is also led out from the first exhaust pipe (20), and the outlet of the return pipe (39) is connected to the air inlet hole on the conical gas distributor (16).

2. The device for catalytic conversion of carbon dioxide into high-value chemicals according to claim 1, characterized in that, A refractory layer (36) is arranged between the sealed heating mechanism and the fluidized bed reactor (14).

3. The device for catalytic conversion of carbon dioxide into high-value chemicals according to claim 1 or 2, characterized in that, The sealed heating mechanism is an electric heating furnace (10), and a sealed cover (8) and a sealed buckle (9) are respectively installed at the upper and lower ends of the electric heating furnace (10).

4. The device for catalytic conversion of carbon dioxide into high-value chemicals according to claim 1, characterized in that, A pressure gauge (11) and an intelligent temperature control sensor (12) are installed on the inner wall of the fluidized bed reactor (14).

5. The device for catalytic conversion of carbon dioxide into high-value chemicals according to claim 1, characterized in that, A mixing preheater (7) is installed on the inlet pipe (30).

6. The device for catalytic conversion of carbon dioxide into high-value chemicals according to claim 1, characterized in that, The CO2 flue gas source inlet pipeline includes a CO2 flue gas source (1). The CO2 flue gas source (1) and the inlet pipe (30) are connected through a first inlet pipe (31). A ball valve (3), a filter (4), a flow controller (5) and a check valve (6) are installed on the first inlet pipe (31); The hydrogen source inlet pipeline includes a hydrogen source (2). The hydrogen source (2) and the inlet pipe (30) are connected through a second inlet pipe (32). A ball valve (3), a filter (4), a flow controller (5) and a check valve (6) are installed on the second inlet pipe (32).

7. The device for catalytic conversion of carbon dioxide into high-value chemicals according to claim 1, characterized in that, The second exhaust pipe (33) is connected to the gas collector (29) through a first exhaust branch pipe (34), and the exhaust pipe (33) is connected to the CO2 analyzer (24) through a second exhaust branch pipe (35).

8. The device for catalytic conversion of carbon dioxide into high-value chemicals according to claim 7, characterized in that, A filter (4) and a back pressure valve (23) are installed on the second exhaust pipe (33), and a pressure reducing valve (21) is installed on the second exhaust branch pipe (35).

9. The apparatus for catalytic conversion of carbon dioxide into high-value chemicals according to claim 1, wherein, Electric stop valves are provided at the feeding mechanism, the waste collection tank (26) and the N2 gas tank (28); A compressor (41) is installed on the reflux pipe (39).

10. A method for catalytic conversion of carbon dioxide into high-value chemicals, characterized in that, The device for catalytic conversion of carbon dioxide into high-value chemicals according to any one of claims 1-9 includes the following steps: Solid catalyst particles (13) are introduced into the fluidized bed reactor (14) through a feeding mechanism; The intake holes on the conical gas distributor (16) receive the reaction gases provided by the CO2 flue gas source inlet pipe and the hydrogen source inlet pipe; The reaction gases pass through the air distribution plate (15) and the cyclone plate (37) and then enter the fluidized bed reactor (14) to react with the solid catalyst particles (13). N2 is blown into the lower end of the fluidized bed reactor (14) from the N2 gas tank (28) through a conduit, causing the solid catalyst particles (13) to move in suspension in the fluidized bed reactor (14) and isolating the reaction from air. During the reaction process, it is sealed and heated by a sealing heating mechanism; The cyclone separator (38) separates the reacted gases and catalyst particles in the fluidized bed reactor (14). The un-deactivated solid catalyst particles (13) are returned to the inside of the reactor to participate in the reaction again, and the deactivated solid catalyst particles (13) are discharged into the waste collection tank (26); Part of the reacted gases enter the conical gas distributor (16) through the reflux pipe (39), are mixed with the fresh reaction gases, and then enter the fluidized bed reactor (14) again. The remaining reacted gases flow through the condenser (22) through the first exhaust pipe (20). The gas products flow into the CO2 analyzer (24) and the gas collector (29) respectively through the second exhaust pipe (33), and the liquid products are collected by the condenser (22).

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