Carbon dioxide ore-smelting gasification integrated collaborative device

Abstract

The invention discloses a carbon dioxide ore-smelting gasification integrated collaborative device. The device comprises a carbon dioxide gasification unit used for converting liquid carbon dioxide into gaseous carbon dioxide; the carbon dioxide mineralization reaction unit is used for performing mineralization reaction on gaseous carbon dioxide; the hot air circulation system is connected between the mineralization reaction unit and the gasification unit and is used for transferring heat released by the mineralization reaction unit to the gasification unit; the cold air circulating system is connected between the gasification unit and the mineralization reaction unit and is used for returning cold air generated in the gasification process to the mineralization reaction unit for heating; and the ambient air introduction system is used for introducing ambient air into the air heating channel of the mineralization reaction unit, and the ambient air is used for heat exchange of the gasification unit after being heated. Through the synergistic effect of heat released by the mineralization reaction unit and the gasification unit, internal energy self-circulation is formed, efficient gasification and mineralization of carbon dioxide are achieved, energy consumption is reduced, and carbon emission is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy conservation and environmental protection, and relates to an integrated synergy device for carbon dioxide mineral gasification. Background Art

[0002] As a carbon dioxide utilization technology in carbon capture and storage (CCS) technology, carbon dioxide mineralization technology is a technology that converts carbon dioxide into solid minerals. It reacts carbon dioxide with metal ions in natural minerals or industrial by-products through chemical reactions to generate stable mineral compounds, thereby achieving long-term storage of carbon dioxide. This technology not only helps to reduce the concentration of carbon dioxide in the atmosphere, but also provides a more durable and environmentally friendly carbon storage method.

[0003] Traditional carbon dioxide mineralization technologies usually require reactions under high temperature or high pressure conditions, consume a large amount of energy, and heat is released during the carbon dioxide mineralization process. If this heat fails to be effectively managed, it will lead to excessive heat emission into the surrounding environment, not only increasing energy waste, but also possibly causing local thermal pollution. In large-scale industrial applications, it may change local climate conditions and affect the surrounding ecosystem and biological habitats.

[0004] In the carbon dioxide capture stage, it usually focuses on efficiently capturing carbon dioxide from industrial emission sources or the air. After a series of purification operations, liquid high-pressure carbon dioxide is filled into a carbon dioxide gasification skid-mounted device for gasification. Traditional carbon dioxide gasification devices generally convert liquid carbon dioxide into gaseous carbon dioxide by adding a large amount of air, heating, and depressurizing at the present stage. There are still some problems in actual applications: First, a large amount of air needs to be continuously introduced into the gasification skid device to maintain the gasification process; the heating gasification method requires a large amount of energy to provide heat; although the pressure reduction gasification method can reduce part of the energy consumption, it still requires a part of energy input to maintain pressure control, which will cause high energy consumption problems. Second, cold gas will be emitted from the gasification device during the gasification process of liquid carbon dioxide, which will cause cold pollution to the surrounding environment. Especially when some gasification devices are operating on a large scale, the emission of cold gas will affect the temperature and humidity of the surrounding environment and have a negative impact on the nearby ecological environment.

[0005] In the current carbon dioxide CCUS technology, the carbon dioxide capture and mineralization utilization links are usually relatively independent, ignoring the potential synergy between the capture and mineralization processes and not fully considering the integrated synergy effect of the two. Summary of the Invention

[0006] The main object of the present invention is to achieve efficient gasification of carbon dioxide, recycling of energy, reduction of system energy consumption and environmental impact through the synchronous operation of mineralization reaction and gasification, and provide an integrated synergistic device for carbon dioxide mineral-thermal gasification.

[0007] The present invention includes: A carbon dioxide gasification unit for converting liquid carbon dioxide into gaseous carbon dioxide; A carbon dioxide mineralization reaction unit for carrying out a mineralization reaction on gaseous carbon dioxide, and the mineralization reaction unit releases heat during the mineralization process; A hot air circulation system connected between the mineralization reaction unit and the gasification unit for transferring the heat released by the mineralization reaction unit to the gasification unit to improve the gasification efficiency of liquid carbon dioxide; A cold air circulation system connected between the gasification unit and the mineralization reaction unit for returning the cold air generated during the gasification process to the mineralization reaction unit for heating to achieve energy recycling; An ambient air introduction system for introducing ambient air into the air heating channel of the mineralization reaction unit, and the ambient air is used for heat exchange in the gasification unit after being heated.

[0008] Through the synergistic effect of the heat released by the mineralization reaction unit and the gasification unit, the collaborative device forms an internal energy self-circulation, realizes efficient gasification and mineralization of carbon dioxide, reduces energy consumption and carbon emissions.

[0009] The beneficial effects of the present invention: Based on the heat released by the carbon dioxide mineralization reaction, the heat is collected and used for heat exchange inside the gasification skid device to improve the gasification efficiency of liquid carbon dioxide, so that gaseous carbon dioxide is continuously and efficiently produced and introduced into the carbon dioxide mineralization reaction device, which helps to improve the carbon dioxide mineralization efficiency. It can not only greatly reduce the large amount of air required for gasification of the carbon dioxide gasification skid device at present stage, and the environmental problem that the cold gas discharged may cause cold pollution to the surrounding environment, but also collect and utilize the heat released by the mineralization reaction, and realize the recycling of energy through the energy circulation mechanism, and also ensure that the heat generated by the mineralization reaction will not cause thermal pollution to the environment in large-scale industrial applications.

[0010] In terms of carbon dioxide treatment, the system realizes the integrated synergistic effect of carbon dioxide mineralization and gasification by effectively connecting the gasification and mineralization steps, greatly reducing the original required air volume, system energy consumption and process cost, and at the same time greatly reducing the system's dependence on external energy, optimizing the overall energy management. No matter in what operating state, the system can maintain efficient energy utilization, continuously achieve high energy-saving effect, and significantly reduce carbon emissions.

[0011] In summary, the present invention fully considers the synergistic integration effect between the carbon dioxide mineralization and gasification skid-mounted device. And fully combines the two, taking into account the utilization of the heat released during the carbon dioxide mineralization process, and synergistically acting with the carbon dioxide gasification skid-mounted device to form an integrated internal self-circulation system. The heat generated by carbon dioxide mineralization is used to heat the air introduced into the gasification skid-mounted device to improve the gasification efficiency of liquid carbon dioxide. The cold air generated after the gasification of liquid carbon dioxide is reused and introduced into the carbon dioxide mineralization system again for heating, realizing an internal closed system for the synergistic integration operation of carbon dioxide mineralization and gasification, achieving the recycling of energy, and at the same time being able to solve the high energy consumption caused by the existing mineralization and gasification systems, reducing pollution emissions and carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the device according to the embodiment of the present application; Figure 2 It is a schematic diagram of the heat transfer cross-section of the carbon dioxide gasification skid-mounted device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] The present invention will be further described below with reference to the drawings: As Figure 1 shown, a carbon dioxide mineral heat gasification integrated synergistic device provided by an embodiment of the present application includes a high-pressure liquid carbon dioxide inlet pipe 1, a liquid carbon dioxide flow regulating valve 2, a carbon dioxide gasification skid-mounted device 3, an air blower 4, a gaseous carbon dioxide delivery pipe 5, a gaseous carbon dioxide flow regulating valve 6, a hot air circulation pipe 7, a hot air flow regulating valve 8, a cold air circulation pipe 9, a cold air circulation pipe stop valve 10, a cold air circulation flow regulating valve 11, an initial cold air discharge pipe 12, an initial cold air discharge pipe stop valve 13, a carbon dioxide mineralization reaction device 14, an ambient air inlet pipe 15, a dust removal net 16, an ambient air flow regulating valve 17, an ambient air inlet pipe stop valve 18, and a dehumidification device 19.

[0014] The shell layer of the carbon dioxide mineralization reaction device 14 is provided with a gaseous carbon dioxide inlet, and an air heating channel is arranged on the outer layer. A heat preservation layer is arranged on the outer layer of the air heating channel. The air heating channel is also provided with an ambient air inlet, a circulating cold air inlet, and a hot air outlet. The ambient air inlet is directly connected to the circulating cold air inlet pipe. A dust removal net 16, a flow regulating valve 17, a stop valve 18, and a dehumidification device 19 are arranged on the ambient air inlet pipe; the circulating cold air inlet is directly connected to the cold air outlet of the gasification skid-mounted device through the cold air circulation pipe 9. A flow regulating valve 11 and a stop valve 10 can be arranged on the cold air circulation pipe 9; the hot air outlet is connected to the hot air inlet of the carbon dioxide gasification skid-mounted device through the hot air circulation pipe 7. A flow regulating valve 8 and a hot air induced draft fan 4 are arranged on the hot air circulation pipe.

[0015] Furthermore, the carbon dioxide gasification skid device 3 is also provided with a high-pressure liquid carbon dioxide inlet pipe 1, a gaseous carbon dioxide outlet, and an initial cold air discharge pipe 12. A carbon dioxide liquid flow regulating valve 2 is provided on the high-pressure liquid carbon dioxide inlet pipe; the gaseous carbon dioxide outlet pipe is directly connected to the carbon dioxide inlet of the mineralization reaction device 14 through a gaseous carbon dioxide delivery pipe 5 to enter the mineralization reaction device for mineralization reaction. A gas flow regulating valve 6 can be provided on the gaseous carbon dioxide delivery pipe to cooperate with the liquid carbon dioxide flow regulating valve to control the carbon dioxide gasification amount required for mineralization; a stop valve 13 is provided on the initial cold air discharge pipe.

[0016] In some embodiments, the mineralization reaction device can be a conventional pressure mineralization reaction kettle, a mechanical stirring reaction kettle, an air-lift reaction kettle, etc. Among these reaction devices, a pressure reaction kettle can be preferably considered. The working pressure of common industrial pressure reaction kettles is usually between 0.5 MPa and 30 MPa, and some special high-pressure reaction kettles can even reach above 40 MPa.

[0017] In some embodiments, the gasification skid device can adopt different types of heat exchangers, such as shell-and-tube heat exchangers, finned-tube heat exchangers, spiral plate heat exchangers, plate-fin heat exchangers, etc. Preferably, it is a shell-and-tube heat exchanger; the heat exchange process is mainly completed through the heat exchange between the air outside the shell or the heated hot air and the high-pressure liquid carbon dioxide inside the tube; the heated hot air ( Figure 2 the arrow in shows its flow direction) is used as a heat source to exchange heat with the high-pressure liquid carbon dioxide inside the tube to improve the gasification efficiency. The hot air enters the inside of the gasification skid device (a rain shield 20 can be covered on its top) through a pipeline, and the temperature difference between the hot air and the cooling medium - high-pressure liquid carbon dioxide drives the transfer of heat, resulting in the temperature rise of the high-pressure liquid carbon dioxide and gasification occurring during this process, as shown in Figure 2 .

[0018] The fan is located near the nozzle of the hot air circulation pipeline of the gasification skid device, and efficiently conveys air and heated hot air to the heat exchanger of the gasification skid device; the fan is equipped with a variable-frequency drive device. In the initial stage of starting the gasification skid device, the system requires a large air flow rate to quickly heat the gas, and at this time, the fan speed is very high. While in the stable operation stage, when the gasification rate tends to be stable, the fan automatically reduces the speed to reduce unnecessary energy consumption.

[0019] Furthermore, the air heating channel of the mineralization reaction device can adopt a spiral channel structure, add baffle plates, or design a corrugated structure on the outer wall of the air channel to increase the flow path of the hot air in the heating channel and maximize the heat exchange effect.

[0020] Furthermore, the ambient air inlet can preferably be arranged at the bottom of the mineralization reaction device. A dust removal net, a flow regulating valve, a flow cut-off valve, and a dehumidification structure device can be provided at the inlet. This inlet arrangement can optimize the air flow distribution, ensure uniform gas flow during the reaction process, and thus improve the efficiency and stability of air heating. In regions with more rainfall in the south, the air humidity is relatively high. Arranging the ambient air inlet at the bottom of the mineralization reaction device can also effectively prevent rainwater from entering the air heating channel through the connection gaps. Meanwhile, it is particularly important to set up a dehumidification structure device, which can effectively remove moisture in the air, prevent the moisture from having an adverse impact on the system process, and avoid affecting the heat exchange effect and gas flow. The setting of the dust removal net can filter particulate matter in the air, prevent these impurities from entering the reaction device, and ensure the cleanliness and long-term stable operation of the air heating channel. At the same time, the flow regulating valve and the flow cut-off valve can flexibly adjust the air flow, optimize the gas supply according to the system requirements, and further improve the energy efficiency and reaction efficiency of the system. The overall design helps to improve the operating stability of the mineralization reaction device, extend the service life of the equipment, and reduce the maintenance cost, and can be applicable to industrial applications in any environment.

[0021] Furthermore, the dehumidification device structure can adopt various design forms, specifically including but not limited to a condensation structure, a hygroscopic material structure, a heat exchange structure, etc., and can be reasonably selected according to different industrial environments.

[0022] In some embodiments, if the ambient air inlet is arranged at one end of the bottom of the mineralization reaction device, the hot air outlet should be arranged at the other end of the top of the mineralization reaction device to achieve the maximum flow of air in the heating channel, so that the cold air can be fully heated.

[0023] The gaseous carbon dioxide delivery pipeline and the hot air circulation pipeline can be arranged in the thermal insulation layer to prevent heat loss to the environment, thereby improving the energy efficiency of the system. This design can effectively maintain the gas temperature in the pipeline, ensure that the heat of the hot air and carbon dioxide is not wasted during the transportation process, and helps to improve the heat exchange efficiency. In addition, the setting of the thermal insulation layer can also prevent the influence of condensation or heat loss outside the pipeline on the environment. Especially in low-temperature or humid environments, it can ensure the stable operation of the system. By reducing heat loss, the system can more efficiently recover and utilize energy, reduce energy consumption, improve the energy efficiency utilization rate during the mineralization reaction process, and thus further improve the economy and sustainability of the overall system.

[0024] The working process of this device: In the initial stage, the cut-off valve of the cold air circulation pipeline is in the closed state, while the cut-off valves of the initial cold air discharge pipeline and the ambient air inlet pipeline are in the open state. High-pressure liquid carbon dioxide enters the gasification skid device from the high-pressure liquid carbon dioxide transportation pipeline; ambient air enters from the ambient air inlet pipeline, passes through processes such as dust removal and dehumidification, through the air heating channel outside the carbon dioxide mineralization equipment, and is introduced into the carbon dioxide gasification skid device by a fan through the hot air circulation pipeline. At this time, the ambient air introduced has not been heated yet, and it exchanges heat with the liquid carbon dioxide in the pipes of the gasification skid device, causing the liquid carbon dioxide to gasify. At the same time, the cold air generated during the gasification process in the gasification skid device is discharged outside the device through the initial cold air discharge pipeline. The generated gaseous carbon dioxide enters the carbon dioxide mineralization device through the gaseous carbon dioxide transportation pipeline for mineralization reaction. The energy released by the carbon dioxide mineralization is collected by the thermal insulation layer set outside the carbon dioxide mineralization device and used to heat the air entering the air heating channel from the environment. The heated air is introduced into the gasification skid device by a fan through the hot air circulation pipeline. At this time, due to the increase in the internal air temperature of the gasification skid device, the gasification efficiency of the liquid carbon dioxide is improved, the amount of gaseous carbon dioxide introduced into the carbon dioxide mineralization device is increased, and the mineralization rate of carbon dioxide is further improved.

[0025] When it is detected that the carbon dioxide mineralization rate enters a stable state and the internal energy of the system reaches the stage where it can support the internal self-circulation and utilization of the system, the cut-off valves of the initial cold air discharge pipeline and the ambient air inlet pipeline are closed, and at the same time, the cut-off valve of the cold air circulation pipeline is opened, so that the cold air generated by the gasification skid device enters the air heating channel through the cold air circulation pipeline for heating treatment. The heated hot air enters the gasification skid device again through the hot air circulation pipeline to achieve the internal closed-loop heat energy circulation of the system. When the carbon dioxide mineralization reaction ends, the heat released by the mineralization reaction device will gradually decrease, thereby affecting the gasification efficiency in the gasification skid device and causing the gasification rate to gradually decrease until the temperature in the gasification skid device reaches equilibrium and the liquid carbon dioxide no longer gasifies. At this time, the system stops working, and subsequent other operations of carbon dioxide mineralization can be carried out.

[0026] This system can not only achieve the rapid, efficient, and stable linkage and coordinated integrated treatment of the carbon dioxide gasification and mineralization processes, improve the gasification efficiency of liquid carbon dioxide, further enhance the carbon dioxide mineralization efficiency, reduce carbon emissions, and greatly reduce energy consumption.

[0027] Based on the principles of heat transfer and recycling, the mineralization reaction is a heat-releasing chemical process. The released heat can be transferred outward to the air heating channel and exchange heat with the cold air in the channel. The heat is conducted from the side of the mineralization reaction device with a higher temperature to the air side with a relatively lower temperature, achieving the purpose of heating the air in the air heating channel. The heated air, with increased temperature and internal energy, enters the gasification skid device through the hot air circulation pipeline. The heat carried by the hot air can provide energy support for the high-pressure liquid carbon dioxide in the gasification skid device. The high-pressure liquid carbon dioxide absorbs heat and is converted into gaseous carbon dioxide. The cooled cold air re-enters the air heating channel through the cold air circulation pipeline for heating again. By optimizing the energy flow path and strengthening the energy efficiency management of each link, the closed-loop recycling of energy is realized, which not only improves the overall energy utilization efficiency of the system, but also promotes the sustainable utilization of resources, reduces energy waste, and helps to achieve the low-carbon transformation of the energy system and the goal of environmentally friendly development.

[0028] In summary, by combining the carbon dioxide mineralization reaction system with the gasification system, this application constructs a carbon dioxide mineral heat gasification integrated collaborative device system. Based on the heat released by the carbon dioxide mineralization reaction, the system collects the heat and uses it for heat exchange inside the gasification skid device to improve the gasification efficiency of liquid carbon dioxide, enabling continuous and efficient production of gaseous carbon dioxide to be introduced into the carbon dioxide mineralization reaction device, which helps to improve the carbon dioxide mineralization efficiency. It can not only greatly reduce the large amount of air required for gasification of the carbon dioxide gasification skid device at present and the environmental problem of cold pollution that the discharged cold gas may cause to the surrounding environment, but also collect and utilize the heat released by the mineralization reaction. Through the energy cycle mechanism, the recycling of energy is realized, and it also ensures that the heat generated by the mineralization reaction will not cause thermal pollution to the environment in large-scale industrial applications. In terms of carbon dioxide treatment, the system effectively connects the gasification and mineralization steps to achieve the integrated collaborative effect of carbon dioxide mineralization and gasification, greatly reducing the original required air volume, system energy consumption, and process cost. At the same time, it also significantly reduces the system's dependence on external energy and optimizes the overall energy management. No matter in what operating state, the system can maintain high-efficiency energy utilization, continuously achieve high-efficiency energy-saving effects, and significantly reduce carbon emissions.

[0029] The above-described embodiments are only descriptions of the preferred embodiments of the present invention and do not limit the scope of the invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An integrated synergistic device for carbon dioxide mineral gasification, characterized in that, Comprising: A carbon dioxide gasification unit for converting liquid carbon dioxide into gaseous carbon dioxide; A carbon dioxide mineralization reaction unit for carrying out a mineralization reaction on gaseous carbon dioxide, wherein heat is released during the mineralization process in the mineralization reaction unit; A hot air circulation system connected between the mineralization reaction unit and the gasification unit for transferring the heat released by the mineralization reaction unit to the gasification unit to improve the gasification efficiency of liquid carbon dioxide; A cold air circulation system connected between the gasification unit and the mineralization reaction unit for returning the cold air generated during the gasification process to the mineralization reaction unit for heating to achieve the recycling of energy; An ambient air introduction system for introducing ambient air into the air heating channel of the mineralization reaction unit, and the ambient air is used for heat exchange in the gasification unit after being heated; Through the synergistic effect of the heat released by the mineralization reaction unit and the gasification unit, the cooperative device forms an internal energy self-circulation, realizes the efficient gasification and mineralization of carbon dioxide, reduces energy consumption and carbon emissions.

2. The integrated synergy device for carbon dioxide gasification with mine heat as claimed in claim 1, wherein, The carbon dioxide gasification unit includes: A high-pressure liquid carbon dioxide inlet for receiving liquid carbon dioxide; A gaseous carbon dioxide outlet for outputting the gasified carbon dioxide; A heat exchanger for carrying out heat exchange with hot air to achieve the gasification of liquid carbon dioxide.

3. The integrated synergy device for carbon dioxide gasification with mine heat as claimed in claim 1, wherein, The carbon dioxide mineralization reaction unit includes: A gaseous carbon dioxide inlet for receiving the gasified carbon dioxide; An air heating channel for heating the incoming air or cold air; A heat insulation layer for collecting the heat released during the mineralization reaction process.

4. The integrated carbon dioxide mine gasification synergistic device according to claim 2 or 3, characterized in that The hot air circulation system includes: A hot air circulation pipeline for transporting the heated air to the carbon dioxide gasification unit; A hot air flow regulating device for regulating the flow rate of hot air.

5. The integrated carbon dioxide mineral gasification synergy device according to claim 2 or 3, characterized in that The cold air circulation system includes: A cold air circulation pipeline for transporting the cold air generated during the gasification process to the air heating channel of the mineralization reaction unit; A cold air flow regulating device for regulating the flow rate of cold air.

6. The integrated synergy device for carbon dioxide gasification with mine heat according to any one of claims 1 to 3, characterized in that, The ambient air introduction system includes: An ambient air inlet pipeline for introducing ambient air; A dust removal device for filtering particulate matter in the ambient air; A dehumidification device for removing moisture in the ambient air; An air flow regulating device for regulating the flow rate of ambient air.

7. The integrated synergy device for carbon dioxide gasification with mine heat as claimed in claim 6, wherein, The mineralization reaction unit is one or more of a pressure mineralization reaction kettle, a mechanical stirring reaction kettle or an air-lift reaction kettle.

8. The integrated synergistic device for carbon dioxide gasification with mine heat according to claim 6, characterized in that, The heat exchanger is one or more of a shell-and-tube heat exchanger, a finned-tube heat exchanger, a spiral plate heat exchanger or a plate-fin heat exchanger.

9. The integrated synergy device for carbon dioxide gasification with mine heat according to claim 1, wherein The cooperative device further includes a fan, and the fan is located on the hot air circulation pipeline for efficiently transporting hot air to the carbon dioxide gasification unit, and is equipped with a variable frequency drive device to adjust the fan speed.

10. The integrated carbon dioxide mine gasification synergistic device according to claim 1 or 9, characterized in that The cooperative device further includes an initial cold air discharge pipeline for discharging cold air from the system at the initial stage of the system, and a stop valve is provided on the initial cold air discharge pipeline for controlling the discharge of cold air.

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