A gaseous carbon dioxide recovery device

Abstract

The utility model relates to the technical field of dangerous chemical article recovery, especially relates to a gaseous carbon dioxide recovery device, it includes input interface, recovery gas storage tank, pressure boost cooling mechanism, intermediate liquid storage tank and liquid carbon dioxide storage tank, the gas inlet of recovery gas storage tank with input interface passes through first pipeline intercommunication, the gas inlet of pressure boost cooling mechanism with the gas outlet of recovery gas storage tank passes through second pipeline intercommunication, the liquid inlet of intermediate liquid storage tank with the liquid outlet of pressure boost cooling mechanism passes through pipeline intercommunication, the liquid inlet of liquid carbon dioxide storage tank with the liquid outlet of intermediate liquid storage tank passes through third pipeline intercommunication, and is provided with liquid delivery pump on third pipeline, compared with prior art, the gaseous carbon dioxide recovery device of the utility model can promote economic efficiency and environmental safety, and can reduce the hidden danger of safety.

Description

Technical Field

[0001] This utility model relates to the field of hazardous chemical recycling technology, and in particular to a gaseous carbon dioxide recycling device. Background Technology

[0002] In the traditional liquid carbon dioxide production industry, carbon dioxide storage tanks and transport tank trucks generate large amounts of gaseous carbon dioxide emissions into the atmosphere during production or loading and unloading. The continuous release of gaseous carbon dioxide into the atmosphere exacerbates global warming and has a significant impact on the environment.

[0003] In the liquid carbon dioxide production industry, the main products include food-grade carbon dioxide conforming to GB 1886.228-2016 and industrial liquid carbon dioxide conforming to GB / T 6052-2011. These products are typically stored and transported in cylindrical or spherical liquid storage tanks.

[0004] In actual production and operation, to maintain the internal pressure of storage tanks within a safe operating range, it is often necessary to release large amounts of gaseous carbon dioxide from the top of the tank for pressure regulation. Furthermore, liquid carbon dioxide transport tankers also release large amounts of gaseous carbon dioxide during cleaning, replacement, or maintenance operations before filling. Currently, most of these emissions are directly released into the atmosphere, not only causing a serious waste of carbon dioxide resources and increasing production costs, but also impacting the environment. Additionally, there is a safety hazard of asphyxiation for people in the vicinity of the emission area. Utility Model Content

[0005] In view of the technical problem that existing technologies typically involve the direct emission of gaseous carbon dioxide during production and operation, lacking a systematic and efficient gas recovery and reuse solution, this utility model provides a gaseous carbon dioxide recovery device. This device can collect, stabilize, compress, liquefy, transport, and store emitted gaseous carbon dioxide, converting it into a standard-compliant industrial liquid carbon dioxide product. This achieves resource utilization of emitted gases, improving economic efficiency and environmental safety.

[0006] A gaseous carbon dioxide recovery device includes an input interface, a recovered gas storage tank, a pressurization and cooling mechanism, an intermediate liquid storage tank, and a liquid carbon dioxide storage tank. The air inlet of the recovered gas storage tank is connected to the input interface through a first pipeline; The air inlet of the pressurization and cooling mechanism is connected to the air outlet of the recovery storage tank through a second pipeline; The inlet of the intermediate storage tank is connected to the outlet of the pressurization and cooling mechanism via a pipeline. The inlet of the liquid carbon dioxide storage tank is connected to the outlet of the intermediate storage tank through a third pipeline, and a liquid transfer pump is installed on the third pipeline.

[0007] Preferably, the pressurization and cooling mechanism includes a gas booster pump and a refrigeration system; The inlet of the gas booster pump is connected to the outlet of the recovered gas storage tank through the second pipeline; The air inlet of the refrigeration system is connected to the air outlet of the gas booster pump through a pipeline. The inlet of the intermediate storage tank is connected to the outlet of the refrigeration system via a pipeline.

[0008] Preferably, a pressure reducing valve is installed on the second pipeline.

[0009] Preferably, the first pipeline is provided with an analysis branch and an emission branch, and the analysis branch is located in front of the emission branch.

[0010] Preferably, it also includes a gas recovery and utilization branch; The gas recovery and utilization branch and the second pipeline are respectively connected to the gas outlet of the gas recovery storage tank.

[0011] Preferably, a check valve and a shut-off valve are provided on the gas recovery and utilization branch; The input interface is equipped with a check valve and a shut-off valve.

[0012] Preferably, the upper part of the gas recovery storage tank is provided with a first pressure detection mechanism and a first pressure regulating mechanism; The upper part of the intermediate storage tank is equipped with a second pressure detection mechanism and a second pressure regulating mechanism.

[0013] Preferably, a gas detection branch is provided at the upper part of the intermediate liquid storage tank; The bottom of the intermediate storage tank is equipped with a carbon dioxide purity detection branch.

[0014] Preferably, multiple input interfaces are provided, and each input interface is connected to the first pipeline; The gas outlet at the top of the liquid carbon dioxide storage tank is connected to one of the input interfaces via a fourth pipeline.

[0015] Preferably, the third pipeline is provided with a flow detection mechanism and a flow regulating valve. The flow detection mechanism is used to detect the flow in the third pipeline in order to control the opening degree of the flow regulating valve.

[0016] Compared with the prior art, the gaseous carbon dioxide recovery device provided by this utility model includes an input interface, a recovery gas storage tank, a pressurization and cooling mechanism, an intermediate liquid storage tank, and a liquid carbon dioxide storage tank; the air inlet of the recovery gas storage tank is connected to the input interface through a first pipeline; the air inlet of the pressurization and cooling mechanism is connected to the air outlet of the recovery gas storage tank through a second pipeline; the liquid inlet of the intermediate liquid storage tank is connected to the liquid outlet of the pressurization and cooling mechanism through a pipeline; the liquid inlet of the liquid carbon dioxide storage tank is connected to the liquid outlet of the intermediate liquid storage tank through a third pipeline, and a liquid transfer pump is provided on the third pipeline. The gaseous carbon dioxide recovery device is equipped with an input interface, which allows connection to external devices. When the external storage tank needs to release gaseous carbon dioxide, its exhaust port can be connected to the input interface. The gaseous carbon dioxide will first flow into the recovery storage tank for temporary storage, and then flow into the pressurization and cooling mechanism to liquefy the gaseous carbon dioxide. The liquefied carbon dioxide will then flow into the intermediate liquid storage tank for temporary storage, and finally, the compliant liquid carbon dioxide will flow into the liquid carbon dioxide storage tank for storage, thus completing the recovery of gaseous carbon dioxide. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a gaseous carbon dioxide recovery device provided in one embodiment. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] It should be noted that when a component is referred to as being "mounted on", "fixed on", or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0021] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0022] This utility model provides a gaseous carbon dioxide recovery device, which includes an input interface, a recovery gas storage tank, a pressurization and cooling mechanism, an intermediate liquid storage tank, and a liquid carbon dioxide storage tank. The inlet of the recovery gas storage tank is connected to the input interface through a first pipeline; the inlet of the pressurization and cooling mechanism is connected to the outlet of the recovery gas storage tank through a second pipeline; the inlet of the intermediate liquid storage tank is connected to the outlet of the pressurization and cooling mechanism through a pipeline; the inlet of the liquid carbon dioxide storage tank is connected to the outlet of the intermediate liquid storage tank through a third pipeline, and a liquid transfer pump is installed on the third pipeline. The gaseous carbon dioxide recovery device is equipped with an input interface, which allows connection to external devices. When the external storage tank needs to release gaseous carbon dioxide, its exhaust port can be connected to the input interface. The gaseous carbon dioxide will first flow into the recovery storage tank for temporary storage, and then flow into the pressurization and cooling mechanism to liquefy the gaseous carbon dioxide. The liquefied carbon dioxide will then flow into the intermediate liquid storage tank for temporary storage, and finally, the compliant liquid carbon dioxide will flow into the liquid carbon dioxide storage tank for storage, thus completing the recovery of gaseous carbon dioxide.

[0023] Please refer to the following: Figure 1 In one embodiment, a gaseous carbon dioxide recovery device 100 is provided, which is mainly used to solve the problems of direct emission of gaseous carbon dioxide in the prior art, causing environmental pollution, resource waste, and safety hazards. The gaseous carbon dioxide recovery device 100 can perform a series of processes such as collection, pressure stabilization, compression, liquefaction, transportation, and storage of gaseous carbon dioxide, converting it into industrial liquid carbon dioxide products that meet the GB / T 6052-2011 standard, thereby realizing the resource utilization of emitted gases and improving economic efficiency and environmental safety.

[0024] In one embodiment, the gaseous carbon dioxide recovery device 100 is specifically used when carbon dioxide storage tanks or transport tanks are depressurized or under maintenance to pressurize and liquefy the emitted gaseous carbon dioxide, and then transport it through pipelines to the storage tank for storage and reuse.

[0025] The gaseous carbon dioxide recovery device 100 includes an input interface 10, a recovery storage tank 20, a pressurization and cooling mechanism 30, an intermediate liquid storage tank 40, and a liquid carbon dioxide storage tank 50. The input interface 10 is primarily used to connect with other equipment and structures, thereby inputting gaseous carbon dioxide into the gaseous carbon dioxide recovery device 100. The recovery storage tank 20 is primarily used to temporarily store and collect the input gaseous carbon dioxide. The pressurization and cooling mechanism 30 is primarily used to pressurize and cool the gaseous carbon dioxide, thereby liquefying it into liquid carbon dioxide. The intermediate liquid storage tank 40 is primarily used to temporarily store and collect liquid carbon dioxide, while the liquid carbon dioxide storage tank 50 serves as a standard-compliant storage and collection container for liquid carbon dioxide.

[0026] The air inlet of the recovery gas storage tank 20 is connected to the input interface 10 via a first pipeline 101. The air inlet of the pressurization and cooling mechanism 30 is connected to the air outlet of the recovery gas storage tank 20 via a second pipeline 102. The liquid inlet of the intermediate liquid storage tank 40 is connected to the liquid outlet of the pressurization and cooling mechanism 30 via a pipeline. The liquid inlet of the liquid carbon dioxide storage tank 50 is connected to the liquid outlet of the intermediate liquid storage tank 40 via a third pipeline 103, and a liquid transfer pump 60 is installed on the third pipeline 103. The main function of the liquid transfer pump 60 is to provide the power for the liquid carbon dioxide to flow in the pipeline. The liquid transfer pump 60 can transfer the standard-compliant liquid carbon dioxide in the intermediate liquid storage tank 40 to the liquid carbon dioxide storage tank 50 via the third pipeline 103.

[0027] When a liquid carbon dioxide transport tanker needs to discharge gaseous carbon dioxide, the outlet of the tanker's storage tank is connected to the input interface 10. The gaseous carbon dioxide discharged from the tanker first flows into the recovery storage tank 20 for temporary storage. Then, the gaseous carbon dioxide in the recovery storage tank 20 flows into the pressurization and cooling mechanism 30, where it is converted into liquid carbon dioxide. The converted liquid carbon dioxide then flows into the intermediate storage tank 40 for temporary storage. Finally, the compliant liquid carbon dioxide flows into the liquid carbon dioxide storage tank 50. This process achieves the recovery of gaseous carbon dioxide, avoiding direct emission that would cause environmental pollution and resource waste, while also reducing safety hazards.

[0028] Preferably, in one embodiment, the pressurization and cooling mechanism 30 includes a gas booster pump 31 and a refrigeration system 32. The inlet of the gas booster pump 31 is connected to the outlet of the recovered gas storage tank 20 through the second pipeline 102. The inlet of the refrigeration system 32 is connected to the outlet of the gas booster pump 31 through a pipeline. The inlet of the intermediate liquid storage tank 40 is connected to the outlet of the refrigeration system 32 through a pipeline. The main function of the gas booster pump 31 is to compress (pressurize) gaseous carbon dioxide and provide power to drive the gaseous carbon dioxide to be transported in the pipeline. The main function of the refrigeration system 32 is to reduce the temperature of the gaseous carbon dioxide, causing it to liquefy and thus convert into liquid carbon dioxide.

[0029] Specifically, in one embodiment, the refrigeration system 32 is a Freon refrigeration system, that is, the refrigeration system 32 is a system that uses fluorinated hydrocarbon refrigerant.

[0030] Preferably, in one embodiment, a pressure reducing valve 201 is provided on the second pipeline 102. The pressure reducing valve 201 can reduce the pressure of the flowing gaseous carbon dioxide to stabilize the inlet pressure of the gas booster pump 31. Preferably, in one embodiment, the first pipeline 101 is provided with an analysis branch 1011 and a discharge branch 1012, and the analysis branch 1011 is located in front of the discharge branch 1012. Here, "in front" refers to the flow direction of gaseous carbon dioxide in the first pipeline 101. That is, when gaseous carbon dioxide flows from the input port 10 towards the recovery storage tank 20 in the first pipeline 101, the gaseous carbon dioxide will first flow through the location of the analysis branch 1011, and then through the location of the discharge branch 1012. The main function of the analysis branch 1011 is to analyze the recovered gas flowing in from the input port 10, detect whether these gases meet the standards, and ensure that the gaseous carbon dioxide flowing into the recovery storage tank 20 is carbon dioxide that meets the standard requirements. If the gas fails the test by the analysis branch 1011, it can be discharged through the discharge branch 1012. To control gas emissions, shut-off valves can be installed at corresponding locations on each pipeline to control the opening and closing of the respective pipelines. In other words, in this embodiment, the first pipeline 101 has two gas path supports: one connected to the analysis branch 1011, and the other connected to the emission branch 1012.

[0031] Specifically, in one embodiment, when gas flows into the online analysis device through the analysis branch 1011, the gas can be analyzed by AI (e.g., carbon dioxide purity, total sulfur, oxygen, carbon monoxide, moisture, etc.). Unqualified gas is discharged through the emission branch 1012, while qualified gas that meets the requirements of GB / T 6052-2011 enters the recovery storage tank 20.

[0032] The number and location of the air inlets on the gas recovery tank 20 can be adjusted according to requirements.

[0033] Preferably, in one embodiment, the gaseous carbon dioxide recovery device 100 further includes a gas recovery and utilization branch 104, which, along with the second pipeline 102, is connected to the outlet of the recovered gas storage tank 20. The gas recovery and utilization branch 104 is primarily used to transport the gas from the recovered gas storage tank 20 to other production equipment, thereby reusing the gas in the recovered gas storage tank 20 as pretreatment regeneration supplementary gas.

[0034] Specifically, in one embodiment, the gas outlet of the gas recovery storage tank 20 is provided with a gas outlet pipe 23, and the gas recovery and utilization branch 104 and the second pipeline 102 are respectively connected to the gas outlet pipe 23.

[0035] Preferably, in one embodiment, the gas recovery and utilization branch 104 is provided with a check valve 202 and a shut-off valve 203. The main function of the check valve 202 is to prevent gas from flowing back into the recovery storage tank 20, and the main function of the shut-off valve 203 is to control the flow rate.

[0036] Preferably, in one embodiment, a check valve 202 and a shut-off valve 203 are provided at the input interface 10. The check valve 202 mainly prevents gas backflow, especially when there are multiple input interfaces 10, as it prevents cross-contamination. The shut-off valve 203 mainly controls the flow rate. Specifically, in one embodiment, the check valve 202 and the shut-off valve 203 are specifically installed on a pipeline connected to the input interface 10, thereby controlling the gas flow direction and flow rate at the input interface 10.

[0037] It should be noted that a shut-off valve 203 can be installed in each pipeline of the gaseous carbon dioxide recovery device 100, so as to control the on / off of the corresponding position of the pipeline. The valve can be selected and arranged according to actual needs.

[0038] Preferably, in one embodiment, the upper part of the gas recovery storage tank 20 is provided with a first pressure detection mechanism 21 and a first pressure regulating mechanism 22. The first pressure detection mechanism 21 is mainly used to detect the pressure inside the gas recovery storage tank 20, while the first pressure regulating mechanism 22 is mainly used to operate according to the detection result of the first pressure detection mechanism 21, thereby controlling the pressure inside the gas recovery storage tank 20 to be at a normal value, preventing overpressure, and ensuring safety.

[0039] Specifically, in one embodiment, the first pressure detection mechanism 21 employs remote pressure transmission; that is, the first pressure detection mechanism 21 uses an instrument device to convert the internal pressure signal of the storage tank into a standard electrical signal and transmit it to a remote control room or monitoring system. The first pressure regulating mechanism 22 is equipped with a first pressure regulating valve PV1, which automatically controls and regulates the pressure based on the detection results of the first pressure detection mechanism 21.

[0040] Preferably, in one embodiment, the upper part of the intermediate liquid storage tank 40 is provided with a second pressure detection mechanism 41 and a second pressure regulating mechanism 42. The second pressure detection mechanism 41 is mainly used to detect the pressure inside the intermediate liquid storage tank 40, while the second pressure regulating mechanism 42 is mainly used to operate according to the detection result of the second pressure detection mechanism 41, thereby controlling the pressure inside the intermediate liquid storage tank 40 to be at a normal value, preventing overpressure, and ensuring safety.

[0041] Specifically, in one embodiment, the second pressure detection mechanism 41 employs remote pressure transmission; that is, the second pressure detection mechanism 41 uses an instrument device to convert the internal pressure signal of the storage tank into a standard electrical signal and transmit it to a remote control room or monitoring system. The second pressure regulating mechanism 42 is equipped with a second pressure regulating valve PV2, which automatically controls and regulates the pressure based on the detection results of the second pressure detection mechanism 41.

[0042] Preferably, in one embodiment, the pipeline outlet of the second pressure regulating mechanism 42 is connected to the gas recovery and utilization branch 104, so that the gas flowing out of the intermediate storage tank 40 can also be transmitted to other production equipment for recovery and utilization through the gas recovery and utilization branch 104.

[0043] Preferably, in one embodiment, a gas detection branch 105 is provided on the upper part of the intermediate liquid storage tank 40. The gas detection branch 105 is mainly used to detect non-condensable gases (such as oxygen, nitrogen, hydrocarbons and other light components) flowing into the intermediate liquid storage tank 40.

[0044] Specifically, in one embodiment, when gas flows into the online analysis device through the analysis branch 1011, the gas can be analyzed with the help of AI.

[0045] Preferably, in one embodiment, a carbon dioxide purity detection branch 106 is provided at the bottom of the intermediate storage tank 40. The carbon dioxide purity detection branch 106 is mainly used to detect the purity of liquid carbon dioxide in the intermediate storage tank 40, so as to ensure that the liquid carbon dioxide that finally flows into the liquid carbon dioxide storage tank 50 is liquid carbon dioxide that meets the standard requirements.

[0046] Preferably, in one embodiment, multiple input interfaces 10 are provided, each input interface 10 being connected to the first pipeline 101, and the gas outlet at the top of the liquid carbon dioxide storage tank 50 is connected to one of the input interfaces 10 via a fourth pipeline. That is, in this embodiment, the gaseous carbon dioxide in the liquid carbon dioxide storage tank 50 can also flow back to the input interface 10 for further processing, thereby further reducing costs and improving utilization.

[0047] Preferably, in one embodiment, the third pipeline 103 is equipped with a flow detection mechanism 70 and a flow regulating valve FV1. The flow detection mechanism 70 is used to detect the flow rate in the third pipeline 103 to control the opening degree of the flow regulating valve FV1. Specifically, in one embodiment, the flow detection mechanism 70 uses remote flow transmission to convert the instantaneous and cumulative flow data of the fluid in the pipeline into standard signals, which are then transmitted via cable to a remote control room for real-time display, recording, and control. The flow regulating valve FV1 operates automatically through the flow detection mechanism 70.

[0048] In one embodiment, the operating principle and process of the gaseous carbon dioxide recovery device 100 are as follows: Three input interfaces 10 are arranged in a row. Two input interfaces 10 are connected to the storage tanks on two tank trucks, and the other input interface 10 is connected to the liquid carbon dioxide storage tank 50. Check valves 202 and shut-off valves 203 are respectively installed at the three input interfaces 10 to prevent cross-contamination between the tank trucks and storage tanks. An analysis branch 1011 is installed on the first pipeline 101 to analyze the recovered gas online (carbon dioxide purity, total sulfur, oxygen, carbon monoxide, moisture, etc.). Unqualified recovered gas is discharged through the discharge branch 1012. Qualified recovered gas that meets the requirements of GB / T 6052-2011 flows into the recovered gas storage tank 20 (tank pressure controlled at 0.2~1.5MPa, volume 100m³).

[0049] The upper part of the gas recovery storage tank 20 is provided with the first pressure detection mechanism 21 and the first pressure regulating mechanism 22, so that the pressure of the gas recovery storage tank 20 can be automatically controlled and regulated to prevent overpressure.

[0050] The gas flowing out of the gas recovery storage tank 20 has two routes: one route is to send the gas to the production unit via the gas recovery and utilization branch 104 after the flow rate is regulated by the check valve 202 and the shut-off valve 203, as pretreatment regeneration supplement gas (the regeneration gas pressure is controlled at 0.01~0.03MPa); the other route is to reduce the pressure to 0.05MPa through the pressure reducing valve 201, and then connect to the gas booster pump 31 through the second pipeline 102.

[0051] The recovered gas is pressurized to 2.0~2.2MPa by the gas booster pump 31 (the gas booster pump 31 adopts frequency conversion regulation, and the load control adjustment is performed according to the pressure of the recovered gas storage tank 20), and then sent to the refrigeration system 32 (Freon refrigerator) through pipeline. The pressurized gaseous carbon dioxide gas is cooled by the Freon refrigerator (pressure 2.0~2.2MPa and temperature 5~-10℃ before liquefaction) and becomes liquid carbon dioxide (pressure 2.0~2.2MPa and temperature -22~-25℃ after liquefaction).

[0052] Liquid carbon dioxide from the Freon refrigeration unit is piped to the intermediate storage tank 40 for storage. Simultaneously, some non-condensable gases (oxygen, nitrogen, hydrocarbons, hydrogen, and other light components) present in the liquid carbon dioxide also enter the intermediate storage tank 40. The top of the intermediate storage tank 40 is equipped with a second pressure detection mechanism 41 and a second pressure regulating mechanism 42 to automatically control and regulate the pressure of the intermediate storage tank 40, preventing overpressure. Additionally, a gas detection branch 105 is installed at the top of the intermediate storage tank 40 to detect non-condensable gases. When the concentration of non-condensable gases is ≥0.1%, the pressure regulating valve PV2 is opened to release the gas, which is then sent to the gas recovery and utilization branch 104. At the same time, a carbon dioxide purity detection branch 106 is installed at the bottom of the intermediate storage tank 40 to detect the purity of the carbon dioxide in the tank. When the carbon dioxide purity is ≤99.9%, the pressure regulating valve PV2 is opened to release the gas, controlling the purity of the liquid carbon dioxide to meet the requirements of GB / T 6052-2011 for industrial liquid carbon dioxide.

[0053] The liquid carbon dioxide from the intermediate storage tank 40 is piped to the inlet of the liquid transfer pump 60. The liquid carbon dioxide is pressurized to 1.8~2.0 MPa by the liquid transfer pump 60 and then piped to the flow regulating valve FV1. The flow rate of the liquid carbon dioxide is regulated and controlled by the flow regulating valve FV1, and then piped into the industrial-grade liquid carbon dioxide storage tank 50. The liquid carbon dioxide is stored in the liquid carbon dioxide storage tank 50 (tank pressure 1.7~1.8 MPa, temperature -22~-25℃).

[0054] The gaseous carbon dioxide recovery device 100, employing fully automated control and requiring minimal investment, enables the complete secondary recovery and reuse of carbon dioxide emissions while ensuring production safety and quality control. When used in conjunction with the carbon dioxide production unit, the recovery device can significantly improve the extraction rate of the production unit (from 90%-92% to 98%-99%), substantially reducing production costs. It can also be used independently. This can mitigate global warming, reduce environmental damage, and generate substantial economic benefits.

[0055] Economic Benefits: Taking a liquid carbon dioxide production unit with an annual output of 200,000 tons as an example, without carbon dioxide emission recovery, the normal production of 200,000 tons of liquid carbon dioxide requires approximately 222,300 tons of raw materials. After adopting the aforementioned gaseous carbon dioxide recovery device 100, the normal production of 200,000 tons of liquid carbon dioxide only requires approximately 202,000 tons of gaseous carbon dioxide raw materials. This results in a saving of 20,000 tons of raw material consumption and generates economic benefits of approximately 2 million yuan.

[0056] Environmental benefits: Equivalent to the carbon sequestration of 110,000 mature trees in a year (calculated at 18 kg carbon sequestration per tree per year), which can indirectly alleviate carbon absorption pressure on ecosystems such as forests and oceans, and contribute to biodiversity conservation. In the long term, it can reduce the probability of natural disasters caused by extreme weather (such as rainstorms and high temperatures) in local areas.

[0057] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. A gaseous carbon dioxide recovery device, characterized in that, Includes an input interface, a gas recovery tank, a pressurization and cooling mechanism, an intermediate liquid storage tank, and a liquid carbon dioxide storage tank; The air inlet of the recovered gas storage tank is connected to the input interface through a first pipeline; The air inlet of the pressurization and cooling mechanism is connected to the air outlet of the recovery storage tank through a second pipeline; The inlet of the intermediate storage tank is connected to the outlet of the pressurization and cooling mechanism via a pipeline. The inlet of the liquid carbon dioxide storage tank is connected to the outlet of the intermediate storage tank through a third pipeline, and a liquid transfer pump is installed on the third pipeline.

2. The gaseous carbon dioxide recovery device according to claim 1, characterized in that, The pressurization and cooling mechanism includes a gas booster pump and a refrigeration system; The inlet of the gas booster pump is connected to the outlet of the recovered gas storage tank through the second pipeline; The air inlet of the refrigeration system is connected to the air outlet of the gas booster pump through a pipeline. The inlet of the intermediate storage tank is connected to the outlet of the refrigeration system via a pipeline.

3. The gaseous carbon dioxide recovery device according to claim 2, characterized in that, A pressure reducing valve is installed on the second pipeline.

4. The gaseous carbon dioxide recovery device according to claim 1, characterized in that, The first pipeline is provided with an analysis branch and an emission branch, and the analysis branch is located in front of the emission branch.

5. The gaseous carbon dioxide recovery device according to claim 1, characterized in that, It also includes gas recovery and utilization branches; The gas recovery and utilization branch and the second pipeline are respectively connected to the gas outlet of the gas recovery storage tank.

6. The gaseous carbon dioxide recovery device according to claim 5, characterized in that, The gas recovery and utilization branch is equipped with a check valve and a shut-off valve. The input interface is equipped with a check valve and a shut-off valve.

7. The gaseous carbon dioxide recovery device according to claim 1, characterized in that, The upper part of the gas recovery tank is equipped with a first pressure detection mechanism and a first pressure regulation mechanism. The upper part of the intermediate storage tank is equipped with a second pressure detection mechanism and a second pressure regulating mechanism.

8. The gaseous carbon dioxide recovery device according to claim 1, characterized in that, A gas detection branch is provided at the top of the intermediate storage tank; The bottom of the intermediate storage tank is equipped with a carbon dioxide purity detection branch.

9. The gaseous carbon dioxide recovery device according to claim 1, characterized in that, The input interface is provided in multiple ways, and each input interface is connected to the first pipeline. The gas outlet at the top of the liquid carbon dioxide storage tank is connected to one of the input interfaces via a fourth pipeline.

10. The gaseous carbon dioxide recovery device according to claim 1, characterized in that, The third pipeline is equipped with a flow detection mechanism and a flow regulating valve. The flow detection mechanism is used to detect the flow rate in the third pipeline in order to control the opening degree of the flow regulating valve.

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