A biomass carbon sequestration system and method

Abstract

The present invention relates to a biomass carbon sequestration system and method; a secondary combustion chamber is arranged on the top of an oxygen-added secondary burner, a grate is arranged at the bottom of a material adding combustion chamber, an ash collecting chamber is arranged at the bottom of the grate, one side of the oxygen-added secondary burner is connected with an induced draft fan through an oxygen-added pipeline, the top of the secondary combustion chamber is connected with a fire passage, a heat energy recovery converter is arranged in a heat conversion box, a replaceable dust filter is arranged in a smoke filter, and the smoke filter is connected with an integrated carbon dioxide recovery device through a gas reverse flow valve; the overall control operation is realized by continuous automation and intelligentization, the control can be implemented according to the operating state of the biomass combustion furnace, the connection between components and smooth and continuous sequestration operation are realized through a controller, the system is suitable for small-scale promotion and use, and is suitable for flexible selection and collection operations at the source of carbon dioxide.

Description

Technical Field

[0001] The present invention relates to the field of advanced environmental protection industry in energy-saving and environmental protection industry, and in particular to a biomass carbon sequestration system and method. Background Art

[0002] According to research, in recent years, the greenhouse effect has led to a series of serious environmental problems, such as accelerated melting of glaciers, frequent extreme weather, warming of the oceans and changes in temperate zones. These environmental problems caused by air pollution have brought unprecedented threats to human survival and sustainable development. As the concentration of carbon dioxide in the atmosphere continues to rise, measures to alleviate and control atmospheric environmental pollution by simply reducing emissions are obviously not effective in curbing the intensification of the greenhouse effect problem.

[0003] Carbon capture and storage technology can capture carbon dioxide by physical or chemical methods before it is emitted into the atmosphere and then store it in the deep sea or underground soil. Negative emission technology refers to the collective name of new technologies that can absorb and capture carbon dioxide from the atmosphere. The CCS technology and NETs technology involved in the current traditional technologies can play an important role in achieving a significant reduction in atmospheric CO 2 concentration. Unlike traditional CCS technology and NETs technology, biomass carbon sequestration technology is a very promising new negative emission technology that has attracted widespread attention. Biomass carbon sequestration technology is a technology that combines biomass energy and carbon dioxide capture and storage to achieve negative greenhouse gas emissions. Biomass carbon sequestration technology uses plant photosynthesis to convert carbon dioxide in the atmosphere into organic matter and accumulate and store it in the form of plant biomass. This part of biomass can be directly used for combustion to generate heat and energy, or chemical reactions can be used to synthesize other high-value clean energy such as natural gas or hydrogen. The carbon dioxide produced during the combustion process is captured and injected into suitable geological structures for permanent storage after treatment.

[0004] There are some disadvantages in the operation of traditional biomass carbon sequestration, which are mainly reflected in the following aspects: first, in the operation of traditional carbon sequestration, its automation and intelligent control are relatively weak, the overall continuity is not strong, and there is a defect of weak continuity in the collection process. The overall efficient recovery of carbon dioxide cannot be achieved through automatic control, and its energy consumption is high. It can generally only be used in large carbon dioxide emission areas and production locations. The overall equipment is expensive and not suitable for large-scale use and promotion; secondly, the traditional biomass carbon sequestration has a relatively single form of transportation for the captured carbon dioxide, often adopting a single transportation mode, and cannot implement the corresponding selection of various output storage modes according to the carbon capture amount and the specific external environment, resulting in a lack of flexibility in its use. There is an output instability or a decrease in collection efficiency due to changes in carbon dioxide output, resulting in a decrease in carbon dioxide collection concentration and an increase in energy consumption in the later storage process; thirdly, the overall thermal conversion efficiency of biomass fuels in the use of traditional biomass carbon sequestration is low, which causes part of the thermal energy to be unable to be fully utilized in the process of thermal energy conversion. At the same time, there is a phenomenon of carbon dioxide escaping into the atmosphere during the thermal energy conversion process, resulting in a decrease in thermal energy utilization efficiency and a decrease in carbon dioxide collection efficiency.

[0005] To sum up, in view of the shortcomings of the prior art, the present invention provides a biomass carbon sequestration system and method with simple structure, convenient operation, energy saving and environmental protection, high degree of intelligence, high degree of automation, low energy consumption, high working and operation efficiency, wide application range, flexible output mode, and the ability to reasonably and effectively transport and store carbon dioxide according to the output, high thermal energy utilization rate, and ensure efficient collection of carbon dioxide. The method is simple and easy to operate, and has broad market prospects. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a biomass carbon sequestration system and method which has a simple structure, convenient operation, energy saving and environmental protection, a high degree of intelligence, a high degree of automation, low energy consumption, high working and operating efficiency, a wide range of applications, flexible output methods, and can reasonably and effectively transport and store carbon dioxide according to the output, has a high thermal energy utilization rate, ensures efficient collection of carbon dioxide, and is simple and easy to operate, so as to overcome the defects in the prior art.

[0007] The technical solution of the present invention is achieved as follows: a biomass carbon sequestration system includes a biomass combustion furnace, a heat conversion box connected to the biomass combustion furnace through a fire passage, and a smoke filter connected to the heat conversion box through a pipeline. An oxygen-added secondary burner is fixedly installed in the middle of the inner cavity of the biomass combustion furnace, a material addition combustion chamber is arranged at the bottom of the oxygen-added secondary burner, a secondary combustion chamber is arranged at the top of the oxygen-added secondary burner, a grate is arranged at the bottom of the material addition combustion chamber, and an ash collection chamber is arranged at the bottom of the grate. One side of the oxygen-added secondary burner is connected to the induced draft fan through an oxygen-added pipeline, and the top of the secondary combustion chamber is connected to the fire passage. A heat recovery converter is arranged in the heat conversion box, a replaceable dust filter is arranged in the smoke filter, and the smoke filter is connected to the integrated carbon dioxide recovery device through a gas reverse flow valve.

[0008] The integrated carbon dioxide recovery device comprises a carbon dioxide recovery tank whose bottom is connected to a gas countercurrent valve, a monoethanolamine solution is added in the carbon dioxide recovery tank, the bottom of the other side of the carbon dioxide recovery tank is connected to a liquid extraction pipe through a first liquid extraction pump, the liquid extraction pipe is connected to the top of the carbon dioxide separation tank, a central heating pipe with a heating coil inside is fixedly installed at the center of the inner cavity of the carbon dioxide separation tank, a plurality of heating reaction tanks with annular groove structures with openings on the top are fixedly mounted on the outer wall of the central heating pipe from top to bottom, the uppermost heating reaction tank is connected to the bottom of the liquid extraction pipe, the two connected heating reaction tanks are connected through a vertical connecting pipe, the lowermost heating reaction tank is connected to the middle and lower part of the carbon dioxide separation tank through a bottom outflow pipe, one side of the bottom of the carbon dioxide separation tank is connected to a liquid recovery pump through a liquid recovery pipe, and the liquid recovery pump is connected to the top of the carbon dioxide recovery tank through a pipeline;

[0009] A control cabinet is provided at the bottom of the carbon dioxide separation tank, and a controller is provided in the control cabinet. The controller is connected to the electric heater through a wire, and the output end of the electric heater is connected to the heating coil. The other side of the top of the carbon dioxide separation tank is connected to the carbon dioxide output pipe, and the carbon dioxide output pipe is connected to the top of the radiator. The bottom of the radiator is connected to the input end of the gas compressor through the carbon dioxide recovery pipe, and the output end of the gas compressor is connected to the pipeline installed with a gas three-way solenoid valve. The gas three-way solenoid valve, the first liquid pump, and the liquid recovery pump are connected to the controller through wires.

[0010] The heat conversion box is a rectangular cavity structure, the fire channel is connected to the middle part of one side of the heat conversion box, the heat recovery converter is a square block structure that can recover the heat energy provided by the fire channel, the heat recovery converter is located at the center of the inner cavity of the heat conversion box, and the middle part of the other side of the heat conversion box is connected to the smoke filter through a pipe, and the replaceable dust filter is movably inserted into the smoke filter through the top of the smoke filter.

[0011] The oxygen-adding secondary burner is a funnel-shaped structure with a circular ring in the middle and mutually symmetrical upper and lower parts. A middle ventilation ring is arranged in the middle of the oxygen-adding secondary burner. The top of the middle ventilation ring is connected to the bottom of the upper expanding bin, and the bottom of the middle ventilation ring is connected to the top of the lower shrinking bin. The top of the material adding combustion chamber is connected to the middle ventilation ring through the lower shrinking bin, and the middle ventilation ring is connected to the secondary combustion chamber through the upper expanding bin. The top outer wall of the upper expanding bin is fixedly connected to the inner wall of the biomass combustion furnace, and the bottom outer wall of the lower shrinking bin is fixedly connected to the inner wall of the biomass combustion furnace. There is a cavity structure between the middle ventilation ring and the inner wall of the biomass combustion furnace, and the cavity structure is connected to the outlet of the oxygenation pipeline. Oxygenation holes are provided on the middle ventilation ring and the upper expanding bin.

[0012] The grate is located between the material adding combustion chamber and the ash collecting chamber. An igniter connected to an external ignition device is arranged in the material adding combustion chamber on one side of the upper part of the grate. An opening and closing closed door is arranged on the biomass combustion furnace corresponding to the material adding combustion chamber. The inlet end of the gas reverse flow valve is connected to the outlet end of the smoke filter.

[0013] The carbon dioxide recovery tank is a tank structure with a smoke exhaust port on the top, a liquid material addition pipe is arranged on one side of the smoke exhaust port, the top liquid level of the monoethanolamine solution is located in the upper middle position of the longitudinal part of the carbon dioxide recovery tank, a touch display and control buttons connected to the controller are arranged on the outer wall of the control cabinet, and a liquid extraction pipe solenoid valve electrically connected to the controller is arranged on the liquid recovery pipe.

[0014] The carbon dioxide separation tank is a sealed tank structure, the top of the liquid extraction pipe and the top of the carbon dioxide output pipe are symmetrically distributed on the top surface of the carbon dioxide separation tank, the central heating tube is a cylindrical tubular structure, the bottom of the central heating tube is fixedly connected to the bottom wall of the carbon dioxide separation tank, the top of the central heating tube is fixedly connected to the lower surface of the top wall of the carbon dioxide separation tank, and the heating coil is a single spiral structure at the junction of the outer side and the inner wall of the central heating tube.

[0015] The top of the heating reaction tank is connected to the inner cavity of the carbon dioxide separation tank, the inner diameter of the heating reaction tank is matched with the outer wall of the central heating tube, the outer diameter of the heating reaction tank is not larger than the inner diameter of the carbon dioxide separation tank, a gas withdrawal chamber is arranged in the carbon dioxide separation tank, the top of the gas withdrawal chamber is connected to the bottom of the carbon dioxide output tube, there are at least two heating reaction tanks, all the heating reaction tanks are evenly distributed on the outer wall of the central heating tube from top to bottom, the length of the bottom outflow pipe below the bottommost heating reaction tank is half of the length of the bottom outflow pipe located at the top, the bottom surface of the bottommost bottom outflow pipe is located above the bottom wall of the carbon dioxide separation tank, and the length between the bottom wall of the carbon dioxide separation tank and the bottom surface of the bottommost bottom outflow pipe is not less than the thickness of the heating reaction tank.

[0016] The radiator is provided with heat sinks, which are distributed on the inner wall of the radiator in an up-and-down staggered manner. The radiator is a rectangular cavity structure. A first support platform is provided at the bottom of the radiator, and the bottom of the first support platform is fixedly connected to the top of the gas compressor. A second support platform is provided at the bottom of the gas compressor, and a bottom support frame is provided below the second support platform. The bottom of the carbon dioxide output pipe is located at the top of one side of the radiator, the top of the carbon dioxide recovery pipe is located at the bottom of the other side of the radiator, the bottom of the carbon dioxide recovery pipe is located at the top of one side of the gas compressor, the top of the pipeline equipped with a gas three-way solenoid valve is located at the bottom of the other side of the gas compressor, and the bottom of the pipeline equipped with a gas three-way solenoid valve is located below the top platen of the bottom support frame, and a clamping fixing hole for clamping the pipeline equipped with the gas three-way solenoid valve is provided on the top platen;

[0017] One side outlet of the three-way solenoid valve is connected to the long-distance carbon dioxide transmission pipeline through an anti-backflow valve. A pipeline support frame is provided below the long-distance carbon dioxide transmission pipeline. The other end of the long-distance carbon dioxide transmission pipeline is connected to the connecting valve. The connecting valve is connected to the secondary pressurizing conveyor through a switching three-way pipeline. The secondary pressurizing conveyor is connected to one side of the underground carbon sequestration chamber through a pipeline with an air intake down-transmission control valve. The other side of the carbon sequestration chamber is connected through the bottom of the output pipeline equipped with an up-transmission control valve. A secondary safety control valve is installed on the top of the output pipeline.

[0018] The other side outlet of the three-way solenoid valve is connected to the top of the carbon dioxide pressurized storage tank movably installed under the bottom support frame through the storage tank high-pressure one-way valve. Series pressurized closing valves that cooperate with the connecting valve and the switching three-way pipe are installed in the middle of the front and rear sides of the carbon dioxide pressurized storage tank. The series pressurized closing valves cooperate with the series pressure supply pipes arranged outside.

[0019] A biomass carbon sequestration method of the biomass carbon sequestration system as described above, wherein the method comprises:

[0020] S1. Open the closed door, add the pre-compressed biomass fuel into the material adding combustion chamber, then close the closed door, turn on the igniter to ignite the biomass fuel, and the biomass fuel slowly burns in the material adding combustion chamber. A large amount of carbon monoxide is generated during the combustion process. The carbon monoxide enters the middle ventilation ring through the lower shrinking bin, and the external induced draft fan is turned on. The external air enters the middle ventilation ring and the upper expanding bin cavity through the oxygen addition hole. The carbon monoxide generated by incomplete combustion is mixed with the externally injected oxygen in the secondary combustion chamber and then fully burned:

[0021] S2. The flame of the secondary combustion chamber continues to move toward the heat conversion box in the fire passage, and the heat energy is recovered by the heat recovery converter in the heat conversion box, and carbon dioxide is generated in the process of heat energy recovery. The flue gas containing high concentration of carbon dioxide enters the smoke filter, and after the dust is filtered by the replaceable dust filter, it enters the bottom of the carbon dioxide recovery tank through the gas reverse flow valve;

[0022] S3. In the carbon dioxide recovery tank, the high-temperature carbon dioxide and flue gas pass through the monoethanolamine solution from bottom to top, the carbon dioxide therein is absorbed by the monoethanolamine solution to form a carbon dioxide absorption liquid, the excess flue gas is discharged through the exhaust port, and the carbon dioxide absorption liquid is sucked into the carbon dioxide separation tank through the first liquid pumping pump and the liquid pumping pipe;

[0023] S4, the uppermost heating reaction tank in the carbon dioxide separation tank receives the carbon dioxide absorption liquid discharged from the liquid extraction pipe, and the electric heater is turned on in advance to heat the heating coil, and the heat is transferred to the central heating tube through the heating coil. The outer wall of the central heating tube directly performs a thermal reaction on the carbon dioxide absorption liquid in the heating reaction tank, and the carbon dioxide in the carbon dioxide absorption liquid is separated from the carbon dioxide absorption liquid by heating. During the separation process, the carbon dioxide absorption liquid in the uppermost heating reaction tank continues to descend through the vertical connecting tube, and the separation and decomposition of carbon dioxide in the carbon dioxide absorption liquid is fully completed during the descending process. Finally, all the resolved monoethanolamine solution flows into the bottom of the carbon dioxide separation tank again through the bottommost vertical connecting tube;

[0024] S5. The monoethanolamine solution flowing into the bottom of the carbon dioxide separation tank is recovered into the carbon dioxide recovery tank through the liquid recovery pipe provided with a liquid extraction pipe solenoid valve, and the carbon dioxide separated by analysis is recovered into the radiator through the gas re-extraction chamber and the carbon dioxide output pipe, and the carbon dioxide is cooled by the heat sink installed in the radiator, and then transported to the pipeline equipped with a gas three-way solenoid valve through the carbon dioxide recovery pipe and the gas compressor;

[0025] S6. According to the preset working time of the biomass combustion furnace, the corresponding outlet end of the three-way solenoid valve is selected to be opened. When the biomass combustion furnace is in a single short-time operation, the outlet on one side of the biomass combustion furnace is connected to the high-pressure one-way valve of the storage tank, and the carbon dioxide output by the gas compressor is recovered through the carbon dioxide pressurized storage tank. After the recovery is completed, the carbon dioxide pressurized storage tank is stored and transported; when the biomass combustion furnace is in a long-term operation, the outlet on the other side of the biomass combustion furnace is connected to the anti-backflow valve, and the carbon dioxide output by the gas compressor is recovered through the carbon dioxide long-distance transmission pipeline. The continuously output carbon dioxide is transported through the carbon dioxide long-distance transmission pipeline. Finally, the connecting valve is connected to the inlet of one side of the transfer three-way pipeline, and the transported carbon dioxide is transported to the pipeline with the air intake and downward transmission control valve through the secondary pressurization conveyor, and the carbon dioxide is finally sealed in the carbon sequestration chamber. After the carbon dioxide pressurized storage tank recovered by the storage and transportation operation is transported to a position near the secondary pressurization conveyor, several carbon dioxide pressurized storage tanks are connected in series in a series manner, and the series pressurization sealing valve set on one side of the carbon dioxide pressurized storage tank at the starting position is connected to the series pressure supply pipeline, and the series pressurization sealing valve set on the other side of the carbon dioxide pressurized storage tank at the ending position is connected to the connecting valve, so that the carbon dioxide in the carbon dioxide pressurized storage tank is finally sealed in the carbon sequestration chamber;

[0026] S7. When the carbon dioxide sealed in the carbon storage chamber needs to be reused, the upper control valve and the secondary safety control valve are opened, and the carbon dioxide sealed in the carbon storage chamber is output through the output pipeline to the reuse end or to the carbon dioxide pressurized storage tank for recycling and reuse. At the same time, the carbon dioxide output from the gas compressor through the carbon dioxide pressurized storage tank can be directly recycled and reused when needed.

[0027] The present invention has the following positive effects:

[0028] First of all, the present invention utilizes an integrated carbon dioxide recovery device in series with a biomass furnace to implement biomass carbon sequestration operations. The overall continuity is strong, and the carbon dioxide discharged from the biomass combustion furnace is directly recovered and then sealed. The overall control operation is realized by a coherent automated intelligent system. The control can be implemented according to the operating status of the biomass combustion furnace, and the connection between components and smooth and coherent sequestration operations can be achieved through the controller. It is suitable for small-scale promotion and use, and is suitable for flexible selection and collection operations at the source of carbon dioxide.

[0029] Secondly, the present invention can implement different modes of carbon dioxide collection operations according to the operating status of the biomass combustion furnace. During the short-term single operation stage of the biomass combustion furnace, a small-capacity recovery operation is implemented through a carbon dioxide pressurized storage tank. When the biomass combustion furnace runs for a long time or at a high power, recovery and sealing operations are implemented through a long-distance carbon dioxide transmission pipeline, thereby realizing flexible selection of collection and transportation methods according to the carbon dioxide collection output, and improving the stability and practicality of the system during operation.

[0030] Thirdly, the present invention is provided with a heat recovery converter, which can provide heat energy collection and transmission operations for various heat energy needs. The whole operates in a closed space, which improves the utilization efficiency of heat energy. At the same time, carbon dioxide will not escape, and efficient recovery can be achieved while fully utilizing heat energy, thereby improving the overall recovery capture efficiency and storage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is one of the partial main view structure schematic diagrams of the present invention.

[0032] Figure 2 This is the second partial main structural schematic diagram of the present invention.

[0033] Figure 3 For the present invention Figure 1 Schematic diagram of the internal structure.

[0034] Figure 4 For the present invention Figure 2 Schematic diagram of the internal structure.

[0035] Figure 5 This is one of the schematic diagrams of the use state structure of the present invention.

[0036] Figure 6 This is the second schematic diagram of the structure of the use state of the present invention.

[0037] Figure 7 For the present invention Figure 5 Schematic diagram of the carbon storage end structure.

[0038] Figure 8 For the present invention Figure 6 Schematic diagram of the carbon storage end structure. DETAILED DESCRIPTION

[0039] like Figure 1 , 2As shown in Figures 3, 4, 5, 6, 7 and 8, a biomass carbon sequestration system comprises a biomass combustion furnace 1, a heat conversion box 6 connected to the biomass combustion furnace 1 through a fire passage 5, and a smoke filter 7 connected to the heat conversion box 6 through a pipeline, an oxygenating secondary burner 35 is fixedly installed in the middle of the inner cavity of the biomass combustion furnace 1, a material adding combustion chamber 39 is arranged at the bottom of the oxygenating secondary burner 35, a secondary combustion chamber 41 is arranged at the top of the oxygenating secondary burner 35, a grate 38 is arranged at the bottom of the material adding combustion chamber 39, and an ash collecting chamber 40 is arranged at the bottom of the grate 38, one side of the oxygenating secondary burner 35 is connected to the induced draft fan 3 through an oxygenating pipeline 4, the top of the secondary combustion chamber 41 is connected to the fire passage 5, a heat recovery converter 42 is arranged in the heat conversion box 6, a replaceable dust filter 43 is arranged in the smoke filter 7, and the smoke filter 7 is connected to the integrated carbon dioxide recovery device through a gas backflow valve 8. The integrated carbon dioxide recovery device includes a carbon dioxide recovery tank 9 whose bottom is connected to a gas countercurrent valve 8, a monoethanolamine solution 44 is added to the carbon dioxide recovery tank 9, the bottom of the other side of the carbon dioxide recovery tank 9 is connected to a liquid extraction pipe 13 through a first liquid extraction pump 12, the liquid extraction pipe 13 is connected to the top of a carbon dioxide separation tank 14, a central heating pipe 47 with a heating coil 48 inside is fixedly installed at the center of the inner cavity of the carbon dioxide separation tank 14, the outer wall of the central heating pipe 47 is fixedly provided with a plurality of heating reaction grooves 49 with annular groove structures with openings on the top from top to bottom, the uppermost heating reaction groove 49 is connected to the bottom of the liquid extraction pipe 13, the two connected heating reaction grooves 49 are connected by a vertical connecting pipe 50, the bottommost heating reaction groove 49 is connected to the middle and lower part of the carbon dioxide separation tank 14 through a bottom outflow pipe 51, and the carbon dioxide One side of the bottom of the separation tank 14 is connected to the liquid recovery pump 25 through the liquid recovery pipe 32, and the liquid recovery pump 25 is connected to the top of the carbon dioxide recovery tank 9 through a pipeline; a control cabinet 15 is provided at the bottom of the carbon dioxide separation tank 14, and a controller 45 is provided in the control cabinet 15, and the controller 45 is connected to the electric heater 46 through a wire, and the output end of the electric heater 46 is connected to the heating coil 48, and the other side of the top of the carbon dioxide separation tank 14 is connected to the carbon dioxide output pipe 18, and the carbon dioxide output pipe 18 is connected to the top of the radiator 19, and the bottom of the radiator 19 is connected to the input end of the gas compressor 22 through the carbon dioxide recovery pipe 21, and the output end of the gas compressor 22 is connected to the pipeline installed with the gas three-way solenoid valve 23, and the gas three-way solenoid valve 23, the first liquid pump 12, the liquid recovery pump 25 and the controller 45 are connected through a wire.

[0040] The heat conversion box 6 is a rectangular cavity structure, the fire channel 5 is connected to the middle part of one side of the heat conversion box 6, the heat energy recovery converter 42 is a square block structure that can recover the heat energy provided by the fire channel 5, and the heat energy recovery converter 42 is located at the center of the inner cavity of the heat conversion box 6. The middle part of the other side of the heat conversion box 6 is connected to the smoke filter 7 through a pipe, and the replaceable dust filter 43 is movably inserted into the smoke filter 7 through the top of the smoke filter 7. The oxygen-adding secondary burner 35 is a funnel-shaped structure with a circular ring in the middle and mutually symmetrical upper and lower parts. A middle ventilation ring 35-3 is arranged in the middle of the oxygen-adding secondary burner 35. The top of the middle ventilation ring 35-3 is connected to the bottom of the upper expansion bin 35-1, and the bottom of the middle ventilation ring 35-3 is connected to the top of the lower shrinking bin 35-2. The top of the material adding combustion chamber 39 is connected to the middle ventilation ring 35-3 through the lower shrinking bin 35-2. 35-3 is connected to the secondary combustion chamber 41 through the upper expansion chamber 35-1, the top outer wall of the upper expansion chamber 35-1 is fixedly connected to the inner wall of the biomass combustion furnace 1, the bottom outer wall of the lower contraction chamber 35-2 is fixedly connected to the inner wall of the biomass combustion furnace 1, and there is a cavity structure between the middle ventilation ring 35-3 and the inner wall of the biomass combustion furnace 1, which is connected to the outlet of the oxygenation pipeline 4, and oxygenation holes 36 are provided on the middle ventilation ring 35-3 and the upper expansion chamber 35-1. The grate 38 is located between the material addition combustion chamber 39 and the ash collection chamber 40, and an igniter 37 connected to an external ignition device is arranged in the material addition combustion chamber 39 on the upper side of the grate 38, and an opening and closing closed door 2 is arranged on the biomass combustion furnace 1 corresponding to the material addition combustion chamber 39, and the inlet end of the gas reverse flow valve 8 is connected to the outlet end of the smoke filter 7.

[0041] The carbon dioxide recovery tank 9 is a tank structure with a smoke exhaust port 11 on the top, and a liquid material addition pipe 10 is arranged on one side of the smoke exhaust port 11. The top liquid level of the monoethanolamine solution 44 is located at the upper position of the longitudinal middle of the carbon dioxide recovery tank 9. The outer wall of the control cabinet 15 is provided with a touch display 16 and a control button 17 connected to the controller 45, and a liquid extraction pipe solenoid valve 33 electrically connected to the controller 45 is arranged on the liquid recovery pipe 32. The carbon dioxide separation tank 14 is a sealed tank structure, and the top of the liquid extraction pipe 13 and the top of the carbon dioxide output pipe 18 are symmetrically distributed on the top surface of the carbon dioxide separation tank 14. The central heating pipe 47 is a cylindrical tubular structure, the bottom of the central heating pipe 47 is fixedly connected to the bottom wall of the carbon dioxide separation tank 14, and the top of the central heating pipe 47 is fixedly connected to the lower surface of the top wall of the carbon dioxide separation tank 14. The heating coil 48 is a single spiral structure at the junction of the outer side and the inner wall of the central heating pipe 47. The top of the heating reaction groove 49 is connected to the inner cavity of the carbon dioxide separation tank 14, the inner diameter of the heating reaction groove 49 is matched with the outer wall of the central heating tube 47, the outer diameter of the heating reaction groove 49 is not larger than the inner diameter of the carbon dioxide separation tank 14, and a gas withdrawal chamber 52 is provided in the carbon dioxide separation tank 14, the top of the gas withdrawal chamber 52 is connected to the bottom of the carbon dioxide output pipe 18, there are at least two heating reaction grooves 49, all the heating reaction grooves 49 are evenly distributed on the outer wall of the central heating tube 47 from top to bottom, the length of the bottom outflow pipe 51 below the bottommost heating reaction groove 49 is half of the length of the bottom outflow pipe 51 located at the top, the bottom surface of the bottommost bottom outflow pipe 51 is located above the bottom wall of the carbon dioxide separation tank 14, and the length between the bottom wall of the carbon dioxide separation tank 14 and the bottom surface of the bottommost bottom outflow pipe 51 is not less than the thickness of the heating reaction groove 49.

[0042] The radiator 19 is provided with heat sinks 53, which are distributed on the inner wall of the radiator 19 in an up-and-down staggered shape. The radiator 19 is a rectangular cavity structure. A first support platform 20 is provided at the bottom of the radiator 19, and the bottom of the first support platform 20 is fixedly connected to the top of the gas compressor 22. A second support platform 24 is provided at the bottom of the gas compressor 22, and a bottom support frame 29 is provided below the second support platform 24. The bottom of the carbon dioxide output pipe 18 is located at the top of one side of the radiator 19, the top of the carbon dioxide recovery pipe 21 is located at the bottom of the other side of the radiator 19, and the bottom of the carbon dioxide recovery pipe 21 is located at the top of one side of the gas compressor 22. The top of the pipeline equipped with the gas three-way solenoid valve 23 is located at the bottom of the other side of the gas compressor 22, and the bottom of the pipeline equipped with the gas three-way solenoid valve 23 is located below the top platen of the bottom support frame 29, and a clamping fixing hole for clamping the pipeline equipped with the gas three-way solenoid valve 23 is provided on the top platen.

[0043] One side outlet of the three-way solenoid valve 23 is connected to the long-distance carbon dioxide transmission pipeline 27 through the anti-backflow valve 26. A pipeline support frame 28 is arranged below the long-distance carbon dioxide transmission pipeline 27. The other end of the long-distance carbon dioxide transmission pipeline 27 is connected to the connecting valve 56. The connecting valve 56 is connected to the secondary pressurizing conveyor 57 through the switching three-way pipeline 55. The secondary pressurizing conveyor 57 is connected to one side of the underground carbon sequestration chamber 59 through a pipeline with an air intake and downward transmission control valve 58. The other side of the carbon sequestration chamber 59 is connected to the upper transmission control valve 58 installed. The bottom of the output pipe 61 of the control valve 60 is connected, and a secondary safety control valve 62 is installed on the top of the output pipe 61; the other side outlet of the three-way solenoid valve 23 is connected to the top of the carbon dioxide pressurized storage tank 31 movably installed under the bottom support frame 29 through the storage tank high-pressure one-way valve 30, and a series pressurized closing valve 34 that cooperates with the connecting valve 56 and the switching three-way pipe 55 is installed in the middle of the front side and the middle of the rear side of the carbon dioxide pressurized storage tank 31. The series pressurized closing valve 34 cooperates with the series pressure supply pipe 54 arranged on the outside.

[0044] Embodiment 1: When the present invention is in operation, the opening and closing closed door 2 is opened, and the biomass fuel that has been compressed and formed in advance is added to the material adding combustion chamber 39, and then the opening and closing closed door 2 is closed, and the igniter 37 is turned on to ignite the biomass fuel. The biomass fuel slowly burns in the material adding combustion chamber 39, and a large amount of carbon monoxide is generated during the combustion process. The carbon monoxide enters the middle ventilation ring 35-3 through the lower contraction bin 35-2, and the external induced draft fan 3 is turned on. The external air enters the middle ventilation ring 35-3 and the inner cavity of the upper expansion bin 35-1 through the oxygen addition hole 36. The carbon monoxide generated by incomplete combustion is mixed with the oxygen injected from the outside in the secondary combustion chamber 41 and fully burned. The flame of the secondary combustion chamber 41 continues to move toward the heat conversion box 6 in the fire passage 5, where the heat energy is recovered by the heat recovery converter 42, and carbon dioxide is generated in the process of heat energy recovery. The flue gas containing high concentration of carbon dioxide enters the smoke filter 7, and after the dust is filtered by the replaceable dust filter 43, it enters the bottom of the carbon dioxide recovery tank 9 through the gas backflow valve 8.

[0045] In the carbon dioxide recovery tank 9, the high-temperature carbon dioxide and flue gas pass through the monoethanolamine solution 44 from bottom to top, and the carbon dioxide therein is absorbed by the monoethanolamine solution 44 to form a carbon dioxide absorption liquid. The excess flue gas is discharged through the smoke exhaust port 11, and the carbon dioxide absorption liquid is sucked into the carbon dioxide separation tank 14 through the first liquid extraction pump 12 and the liquid extraction pipe 13. The uppermost heating reaction tank 49 in the carbon dioxide separation tank 14 receives the carbon dioxide absorption liquid discharged from the liquid extraction pipe 13, and the electric heater 46 is turned on in advance to heat the heating coil 48. The heat is transferred to the central heating pipe 47 through the heating coil 48. The outer wall of the central heating pipe 47 directly performs a thermal reaction on the carbon dioxide absorption liquid in the heating reaction tank 49, and the carbon dioxide in the carbon dioxide absorption liquid is separated from the carbon dioxide absorption liquid by heating. In the separation process, the carbon dioxide absorption liquid in the uppermost heating reaction tank 49 continues to descend through the vertical connecting pipe 50, and the separation of carbon dioxide in the carbon dioxide absorption liquid is fully completed during the descending process. Finally, all the resolved monoethanolamine solution 44 flows into the bottom of the carbon dioxide separation tank 14 again through the bottommost vertical connecting pipe 50. The monoethanolamine solution 44 flowing into the bottom of the carbon dioxide separation tank 14 is recovered into the carbon dioxide recovery tank 9 through the liquid recovery pipe 32 provided with a liquid extraction pipe solenoid valve 33, and the separated carbon dioxide is recovered into the radiator 19 through the gas re-extraction chamber 52 and the carbon dioxide output pipe 18. The carbon dioxide is cooled by the heat sink 53 installed in the radiator 19, and then transported to the pipeline equipped with the gas three-way solenoid valve 23 through the carbon dioxide recovery pipe 21 and the gas compressor 22.

[0046] When the biomass combustion furnace 1 is in a single short-time operation, the outlet of one side of the biomass combustion furnace 1 is connected to the storage tank high-pressure one-way valve 30, and the carbon dioxide output by the gas compressor 22 is recovered through the carbon dioxide pressurized storage tank 31. After the recovery is completed, the carbon dioxide pressurized storage tank 31 is stored and transported. After the carbon dioxide pressurized storage tank 31 recovered by the storage and transportation operation is transported to a position near the secondary pressurized conveyor 57, a plurality of carbon dioxide pressurized storage tanks 31 are connected in series in a series manner, and the series pressurized closed valve 34 set on one side of the carbon dioxide pressurized storage tank 31 at the starting position is connected to the series pressure supply pipeline 54, and the series pressurized closed valve 34 set on the other side of the carbon dioxide pressurized storage tank 31 at the end position is connected to the connecting valve 56. Under the continuous operation of the series pressure supply pipeline 54, the carbon dioxide output after the series is transported to the pipeline with the air intake down-transmission control valve 58 through the secondary pressurized conveyor 57, and finally the carbon dioxide is sealed in the carbon storage chamber 59.

[0047] When the carbon dioxide sealed in the carbon storage chamber 59 needs to be reused, the upper control valve 60 and the secondary safety control valve 62 are opened, and the carbon dioxide sealed in the carbon storage chamber 59 is output to the reuse end or the carbon dioxide pressurized storage tank 31 through the output pipe 61 for recycling and reuse. At the same time, the carbon dioxide output from the gas compressor 22 through the carbon dioxide pressurized storage tank 31 can be directly recycled and reused when needed.

[0048] Embodiment 2: Open the opening and closing closed door 2, add the pre-compressed biomass fuel into the material adding combustion chamber 39, then close the opening and closing closed door 2, turn on the igniter 37 to ignite the biomass fuel, and the biomass fuel slowly burns in the material adding combustion chamber 39, and a large amount of carbon monoxide is generated during the combustion process. The carbon monoxide enters the middle ventilation ring 35-3 through the lower shrinking bin 35-2, and the external induced draft fan 3 is turned on. The external air enters the middle ventilation ring 35-3 and the inner cavity of the upper expanding bin 35-1 through the oxygen addition hole 36. The carbon monoxide generated by incomplete combustion is mixed with the oxygen injected from the outside in the secondary combustion chamber 41 and fully burned. The flame of the secondary combustion chamber 41 continues to move toward the heat conversion box 6 in the fire passage 5, where the heat energy is recovered by the heat recovery converter 42, and carbon dioxide is generated in the process of heat energy recovery. The flue gas containing high concentration of carbon dioxide enters the smoke filter 7, and after the dust is filtered by the replaceable dust filter 43, it enters the bottom of the carbon dioxide recovery tank 9 through the gas backflow valve 8.

[0049] In the carbon dioxide recovery tank 9, the high-temperature carbon dioxide and flue gas pass through the monoethanolamine solution 44 from bottom to top, and the carbon dioxide therein is absorbed by the monoethanolamine solution 44 to form a carbon dioxide absorption liquid. The excess flue gas is discharged through the smoke exhaust port 11, and the carbon dioxide absorption liquid is sucked into the carbon dioxide separation tank 14 through the first liquid extraction pump 12 and the liquid extraction pipe 13. The uppermost heating reaction tank 49 in the carbon dioxide separation tank 14 receives the carbon dioxide absorption liquid discharged from the liquid extraction pipe 13, and the electric heater 46 is turned on in advance to heat the heating coil 48. The heat is transferred to the central heating pipe 47 through the heating coil 48. The outer wall of the central heating pipe 47 directly performs a thermal reaction on the carbon dioxide absorption liquid in the heating reaction tank 49, and the carbon dioxide in the carbon dioxide absorption liquid is separated from the carbon dioxide absorption liquid by heating. In the separation process, the carbon dioxide absorption liquid in the uppermost heating reaction tank 49 continues to descend through the vertical connecting pipe 50, and the separation of carbon dioxide in the carbon dioxide absorption liquid is fully completed during the descending process. Finally, all the resolved monoethanolamine solution 44 flows into the bottom of the carbon dioxide separation tank 14 again through the bottommost vertical connecting pipe 50. The monoethanolamine solution 44 flowing into the bottom of the carbon dioxide separation tank 14 is recovered into the carbon dioxide recovery tank 9 through the liquid recovery pipe 32 provided with a liquid extraction pipe solenoid valve 33, and the separated carbon dioxide is recovered into the radiator 19 through the gas re-extraction chamber 52 and the carbon dioxide output pipe 18. The carbon dioxide is cooled by the heat sink 53 installed in the radiator 19, and then transported to the pipeline equipped with the gas three-way solenoid valve 23 through the carbon dioxide recovery pipe 21 and the gas compressor 22.

[0050] When the biomass combustion furnace 1 is in operation for a long time, the outlet on the other side of the biomass combustion furnace 1 is connected to the anti-backflow valve 26, and the carbon dioxide output by the gas compressor 22 is recovered through the long-distance carbon dioxide transmission pipeline 27. The continuously output carbon dioxide is finally connected to the inlet on one side of the transfer three-way pipeline 55 through the connecting valve 56 through the long-distance carbon dioxide transmission pipeline 27, and the transported carbon dioxide is transported to the pipeline with the air intake down-transmission control valve 58 through the secondary pressurization conveyor 57, and finally the carbon dioxide is sealed in the carbon sequestration chamber 59. After the carbon dioxide pressurized storage tank 31 recovered by the storage and transportation operation is transported to a position near the secondary pressurization conveyor 57, a plurality of carbon dioxide pressurized storage tanks 31 are connected in series in a series manner, and the series pressurization closing valve 34 set on one side of the carbon dioxide pressurized storage tank 31 at the starting position is connected to the series pressure supply pipeline 54, and the series pressurization closing valve 34 set on the other side of the carbon dioxide pressurized storage tank 31 at the end position is connected to the connecting valve 56, so that the carbon dioxide in the carbon dioxide pressurized storage tank 31 is finally sealed in the carbon sequestration chamber 59.

[0051] When the carbon dioxide sealed in the carbon storage chamber 59 needs to be reused, the upper control valve 60 and the secondary safety control valve 62 are opened, and the carbon dioxide sealed in the carbon storage chamber 59 is output to the reuse end or the carbon dioxide pressurized storage tank 31 through the output pipe 61 for recycling and reuse. At the same time, the carbon dioxide output from the gas compressor 22 through the carbon dioxide pressurized storage tank 31 can be directly recycled and reused when needed.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biomass carbon sequestration system, comprising a biomass combustion furnace (1), a heat conversion box (6) connected to the biomass combustion furnace (1) through a fire passage (5), and a smoke filter (7) connected to the heat conversion box (6) through a pipeline, characterized in that: An oxygenating secondary burner (35) is fixedly installed in the middle of the inner cavity of the biomass combustion furnace (1); a material adding combustion chamber (39) is arranged at the bottom of the oxygenating secondary burner (35); a secondary combustion chamber (41) is arranged at the top of the oxygenating secondary burner (35); a grate (38) is arranged at the bottom of the material adding combustion chamber (39); an ash collecting chamber (40) is arranged at the bottom of the grate (38); one side of the oxygenating secondary burner (35) is connected to the induced draft fan (3) through an oxygenating pipeline (4); the top of the secondary combustion chamber (41) is connected to the fire passage (5); a heat energy recovery converter (42) is arranged in the heat conversion box (6); a replaceable dust filter (43) is arranged in the smoke filter (7); and the smoke filter (7) is connected to the integrated carbon dioxide recovery device through a gas reverse flow valve (8); The integrated carbon dioxide recovery device comprises a carbon dioxide recovery tank (9) whose bottom is connected to a gas countercurrent valve (8), a monoethanolamine solution (44) is added to the carbon dioxide recovery tank (9), the bottom of the other side of the carbon dioxide recovery tank (9) is connected to a liquid extraction pipe (13) via a first liquid extraction pump (12), the liquid extraction pipe (13) is connected to the top of a carbon dioxide separation tank (14), a central heating pipe (47) with a heating coil (48) mounted therein is fixedly installed at the center of the inner cavity of the carbon dioxide separation tank (14), and the outer wall of the central heating pipe (47) is fixedly mounted with a heating coil (48) from top to bottom. A plurality of heating reaction grooves (49) having an annular groove structure with an opening at the top, the uppermost heating reaction groove (49) being connected to the bottom of the liquid extraction pipe (13), the two connected heating reaction grooves (49) being connected to each other via a vertical connecting pipe (50), the lowermost heating reaction groove (49) being connected to the middle and lower part of the carbon dioxide separation tank (14) via a bottom outflow pipe (51), the bottom side of the carbon dioxide separation tank (14) being connected to a liquid recovery pump (25) via a liquid recovery pipe (32), and the liquid recovery pump (25) being connected to the top of the carbon dioxide recovery tank (9) via a pipeline; A control cabinet (15) is provided at the bottom of the carbon dioxide separation tank (14), and a controller (45) is provided in the control cabinet (15). The controller (45) is connected to an electric heater (46) via a wire, and an output end of the electric heater (46) is connected to a heating coil (48). The other side of the top of the carbon dioxide separation tank (14) is connected to a carbon dioxide output pipe (18), and the carbon dioxide output pipe (18) is connected to the top of a radiator (19). The bottom of the radiator (19) is connected to an input end of a gas compressor (22) via a carbon dioxide recovery pipe (21). The output end of the gas compressor (22) is connected to a pipeline equipped with a gas three-way solenoid valve (23). The gas three-way solenoid valve (23), a first liquid extraction pump (12), and a liquid recovery pump (25) are connected to the controller (45) via a wire. The top of the heating reaction tank (49) is connected to the inner cavity of the carbon dioxide separation tank (14), the inner diameter of the heating reaction tank (49) matches the outer wall of the central heating tube (47), the outer diameter of the heating reaction tank (49) is not larger than the inner diameter of the carbon dioxide separation tank (14), a gas re-extraction chamber (52) is provided in the carbon dioxide separation tank (14), the top of the gas re-extraction chamber (52) is connected to the bottom of the carbon dioxide output tube (18), there are at least two heating reaction tanks (49), all of which are The heating reaction grooves (49) are evenly distributed on the outer wall of the central heating tube (47) from top to bottom; the length of the bottom outflow pipe (51) below the bottommost heating reaction groove (49) is half the length of the bottom outflow pipe (51) located at the top; the bottom surface of the bottom outflow pipe (51) is located above the bottom wall of the carbon dioxide separation tank (14); and the length between the bottom wall of the carbon dioxide separation tank (14) and the bottom surface of the bottom outflow pipe (51) is not less than the thickness of the heating reaction groove (49).

2. The biomass carbon sequestration system according to claim 1, characterized in that: The heat conversion box (6) is a rectangular cavity structure. The fire passage (5) is connected to the middle of one side of the heat conversion box (6). The heat recovery converter (42) is a square block structure capable of recovering heat energy provided by the fire passage (5). The heat recovery converter (42) is located at the center of the inner cavity of the heat conversion box (6). The middle of the other side of the heat conversion box (6) is connected to the smoke filter (7) through a pipeline. The replaceable dust filter (43) is movably inserted into the smoke filter (7) through the top of the smoke filter (7).

3. The biomass carbon sequestration system according to claim 1, characterized in that: The oxygen-adding secondary burner (35) is a funnel-shaped structure with a circular ring in the middle and mutually symmetrical upper and lower parts. A middle ventilation ring (35-3) is arranged in the middle of the oxygen-adding secondary burner (35). The top of the middle ventilation ring (35-3) is connected to the bottom of the upper expansion bin (35-1), and the bottom of the middle ventilation ring (35-3) is connected to the top of the lower shrinking bin (35-2). The top of the material adding combustion chamber (39) is connected to the middle ventilation ring (35-3) through the lower shrinking bin (35-2). -3) is connected to the secondary combustion chamber (41) through an upper expansion chamber (35-1), the top outer wall of the upper expansion chamber (35-1) is fixedly connected to the inner wall of the biomass combustion furnace (1), the bottom outer wall of the lower contraction chamber (35-2) is fixedly connected to the inner wall of the biomass combustion furnace (1), a cavity structure is formed between the middle ventilation ring (35-3) and the inner wall of the biomass combustion furnace (1), the cavity structure is connected to the outlet of the oxygenation pipeline (4), and oxygenation holes (36) are provided on the middle ventilation ring (35-3) and the upper expansion chamber (35-1).

4. The biomass carbon sequestration system according to claim 1, characterized in that: The grate (38) is located between the material adding combustion chamber (39) and the ash collecting chamber (40); an igniter (37) connected to an external ignition device is arranged in the material adding combustion chamber (39) on one side of the upper part of the grate (38); an opening and closing closed door (2) is arranged on the biomass combustion furnace (1) corresponding to the material adding combustion chamber (39); and the inlet end of the gas backflow valve (8) is connected to the outlet end of the smoke filter (7).

5. The biomass carbon sequestration system according to claim 1, characterized in that: The carbon dioxide recovery tank (9) is a tank structure with a smoke exhaust port (11) on the top, a liquid material addition pipe (10) is arranged on one side of the smoke exhaust port (11), the top liquid level of the monoethanolamine solution (44) is located at the upper middle position of the carbon dioxide recovery tank (9) in the longitudinal direction, a touch display (16) and a control button (17) connected to the controller (45) are arranged on the outer wall of the control cabinet (15), and a liquid extraction pipe solenoid valve (33) electrically connected to the controller (45) is arranged on the liquid recovery pipe (32).

6. The biomass carbon sequestration system according to claim 1, characterized in that: The carbon dioxide separation tank (14) is a sealed tank structure, the top of the liquid extraction pipe (13) and the top of the carbon dioxide output pipe (18) are symmetrically distributed on the top surface of the carbon dioxide separation tank (14), the central heating pipe (47) is a cylindrical tubular structure, the bottom of the central heating pipe (47) is fixedly connected to the bottom wall of the carbon dioxide separation tank (14), the top of the central heating pipe (47) is fixedly connected to the lower surface of the top wall of the carbon dioxide separation tank (14), and the heating coil (48) is a single spiral structure at the junction of the outer side and the inner wall of the central heating pipe (47).

7. The biomass carbon sequestration system according to claim 1, characterized in that: The radiator (19) is provided with fins (53), which are distributed on the inner wall of the radiator (19) in an up-and-down staggered manner. The radiator (19) is a rectangular cavity structure. A first support platform (20) is provided at the bottom of the radiator (19). The bottom of the first support platform (20) is fixedly connected to the top of the gas compressor (22). A second support platform (24) is provided at the bottom of the gas compressor (22). A bottom support frame (29) is provided below the second support platform (24). The bottom of the carbon dioxide output pipe (18) is located at the bottom of the gas compressor (22). At the top of one side of the radiator (19), the top of the carbon dioxide recovery pipe (21) is located at the bottom of the other side of the radiator (19), the bottom of the carbon dioxide recovery pipe (21) is located at the top of one side of the gas compressor (22), the top of the pipe on which the gas three-way solenoid valve (23) is installed is located at the bottom of the other side of the gas compressor (22), the bottom of the pipe on which the gas three-way solenoid valve (23) is installed is located below the top platform of the bottom support frame (29), and a clamping fixing hole for clamping the pipe on which the gas three-way solenoid valve (23) is installed is opened on the top platform; One side outlet of the three-way solenoid valve (23) is connected to the long-distance carbon dioxide transmission pipeline (27) through an anti-backflow valve (26); a pipeline support frame (28) is provided below the long-distance carbon dioxide transmission pipeline (27); the other end of the long-distance carbon dioxide transmission pipeline (27) is connected to a connecting valve (56); the connecting valve (56) is connected to a secondary pressurizing conveyor (57) through a switching three-way pipeline (55); the secondary pressurizing conveyor (57) is connected to one side of an underground carbon sequestration chamber (59) through a pipeline with an air intake downward transmission control valve (58); the other side of the carbon sequestration chamber (59) is connected through the bottom of an output pipeline (61) equipped with an upward transmission control valve (60); a secondary safety control valve (62) is installed at the top of the output pipeline (61); The outlet on the other side of the three-way solenoid valve (23) is connected to the top of a carbon dioxide pressurized storage tank (31) movably installed below the bottom support frame (29) through a storage tank high-pressure non-return valve (30). A series pressurized closing valve (34) that cooperates with a connecting valve (56) and a switching three-way pipe (55) is installed in the middle of the front side and the middle of the rear side of the carbon dioxide pressurized storage tank (31). The series pressurized closing valve (34) cooperates with a series pressure supply pipe (54) arranged outside.

8. A biomass carbon sequestration method of the biomass carbon sequestration system according to any one of claims 1 to 7, characterized in that: The method is: S1, opening the opening and closing closed door (2), adding the biomass fuel that has been compressed and formed in advance into the material adding combustion chamber (39), then closing the opening and closing closed door (2), turning on the igniter (37) to ignite the biomass fuel, and the biomass fuel slowly burns in the material adding combustion chamber (39), and a large amount of carbon monoxide is generated during the combustion process. The carbon monoxide enters the middle ventilation ring (35-3) through the lower contraction chamber (35-2), and the external induced draft fan (3) is turned on, and the external air enters the middle ventilation ring (35-3) and the inner cavity of the upper expansion chamber (35-1) through the oxygen addition hole (36). The carbon monoxide generated by incomplete combustion is mixed with the oxygen injected from the outside in the secondary combustion chamber (41) and then fully burned: S2, the flame of the secondary combustion chamber (41) continues to move in the fire passage (5) toward the heat conversion box (6), and heat energy is recovered in the heat conversion box (6) through the heat energy recovery converter (42), and carbon dioxide is generated in the process of heat energy recovery. The flue gas containing high concentration of carbon dioxide enters the smoke filter (7), and after the dust is filtered by the replaceable dust filter (43), it enters the bottom of the carbon dioxide recovery tank (9) through the gas reverse flow valve (8); S3. In the carbon dioxide recovery tank (9), the high-temperature carbon dioxide and flue gas pass through the monoethanolamine solution (44) from bottom to top, the carbon dioxide therein is absorbed by the monoethanolamine solution (44) to form a carbon dioxide absorption liquid, the excess flue gas is discharged through the exhaust port (11), and the carbon dioxide absorption liquid is sucked into the carbon dioxide separation tank (14) through the first liquid extraction pump (12) and the liquid extraction pipe (13); S4, the uppermost heating reaction tank (49) in the carbon dioxide separation tank (14) receives the carbon dioxide absorption liquid discharged from the liquid extraction pipe (13), and pre-starts the electric heater (46) to heat the heating coil (48), and the heat is transferred to the central heating pipe (47) through the heating coil (48). The outer wall of the central heating pipe (47) directly performs a thermal reaction on the carbon dioxide absorption liquid in the heating reaction tank (49), and the carbon dioxide in the carbon dioxide absorption liquid is separated from the carbon dioxide absorption liquid by heating. During the separation process, the carbon dioxide absorption liquid in the uppermost heating reaction tank (49) continues to descend through the vertical connecting pipe (50), and the separation of carbon dioxide in the carbon dioxide absorption liquid is fully completed during the descending process. Finally, the monoethanolamine solution (44) after all the decomposition flows back into the bottom of the carbon dioxide separation tank (14) through the lowermost vertical connecting pipe (50); S5, the monoethanolamine solution (44) flowing into the bottom of the carbon dioxide separation tank (14) is recovered into the carbon dioxide recovery tank (9) through the liquid recovery pipe (32) provided with a liquid extraction pipe electromagnetic valve (33), and the carbon dioxide separated by analysis is recovered into the radiator (19) through the gas re-extraction chamber (52) and the carbon dioxide output pipe (18), and the carbon dioxide is cooled by the heat sink (53) installed in the radiator (19), and then transported to the pipeline equipped with the gas three-way electromagnetic valve (23) through the carbon dioxide recovery pipe (21) and the gas compressor (22); S6. According to the preset working time of the biomass combustion furnace (1), the corresponding outlet end of the three-way solenoid valve (23) is opened. When the biomass combustion furnace (1) is in a single short-time operation, the outlet on one side of the biomass combustion furnace (1) is connected to the storage tank high-pressure check valve (30), and the carbon dioxide output from the gas compressor (22) is recovered through the carbon dioxide pressurized storage tank (31). After the recovery is completed, the carbon dioxide pressurized storage tank (31) is stored and transported. When the biomass combustion furnace (1) is in a long-term operation, the outlet on the other side of the biomass combustion furnace (1) is connected to the anti-backflow valve (26), and the carbon dioxide output from the gas compressor (22) is recovered through the carbon dioxide long-distance transmission pipeline (27). The continuously output carbon dioxide is finally transported through the carbon dioxide long-distance transmission pipeline (27) through the connecting valve. (56) is connected to one side inlet of the transfer three-way pipeline (55), and the transported carbon dioxide is transported to the pipeline with the air intake and down-transmission control valve (58) through the secondary pressurization conveyor (57), and finally the carbon dioxide is sealed in the carbon sequestration chamber (59). After the carbon dioxide pressurized storage tank (31) recovered by the storage and transportation operation is transported to a position near the secondary pressurization conveyor (57), a plurality of carbon dioxide pressurized storage tanks (31) are connected in series in a series manner, and the series pressurization sealing valve (34) provided on one side of the carbon dioxide pressurized storage tank (31) at the starting position is connected to the series pressure supply pipeline (54), and the series pressurization sealing valve (34) provided on the other side of the carbon dioxide pressurized storage tank (31) at the ending position is connected to the connecting valve (56), so that the carbon dioxide in the carbon dioxide pressurized storage tank (31) is finally sealed in the carbon sequestration chamber (59); S7. When the carbon dioxide sealed in the carbon sealing chamber (59) needs to be reused, the upper control valve (60) and the secondary safety control valve (62) are opened, and the carbon dioxide sealed in the carbon sealing chamber (59) is output through the output pipeline (61) to the reuse end or the carbon dioxide pressurized storage tank (31) for recycling and reuse. At the same time, the carbon dioxide output from the gas compressor (22) can be directly recycled and reused through the carbon dioxide pressurized storage tank (31) when needed.

Images