Carbon dioxide recovery device of supercritical carbon dioxide extraction equipment

Abstract

The utility model discloses a carbon dioxide recovery device of supercritical carbon dioxide extraction equipment, the recovery device comprises a heat exchange assembly, the heat exchange assembly is communicated with a preheating device, the heat exchange assembly can cool carbon dioxide discharged from the preheating assembly so as to separate the carbon dioxide from impurities. According to the utility model, the separation of moisture and essential oil in gas is realized, so that the gas is more pure, and the recycling of the gas is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of extraction equipment, in particular to a carbon dioxide recovery device for supercritical carbon dioxide extraction equipment. Background Art

[0002] Supercritical carbon dioxide fluid extraction is a highly efficient material separation technology with a wide range of applications. It should be widely used in the fields of petroleum, textiles, traditional Chinese medicine, etc.

[0003] Existing essential oil extraction often uses a supercritical carbon dioxide extraction device to extract the essential oil from the material to be extracted. After the essential oil is extracted, the essential oil and carbon dioxide are separated by heating. At this time, the carbon dioxide retains a certain amount of heat, resulting in the essential oil still containing gaseous moisture and essential oil components, which can easily cause the recovered carbon dioxide to be impure and not conducive to use. Utility Model Content

[0004] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a carbon dioxide recovery device for supercritical carbon dioxide extraction equipment, wherein the recovery device comprises a heat exchange component, the heat exchange component is connected to a preheating device, and the heat exchange component can cool the carbon dioxide discharged from the preheating device to separate the carbon dioxide from impurities;

[0005] The heat exchange component comprises

[0006] An air intake part, which is connected to the heat exchange component, and includes an air intake cavity, in which a cavity capable of buffering gas is provided, and an air intake pipe is provided at the end of the air intake cavity;

[0007] A heat exchange part, wherein the air inlet part is fixedly mounted at one end of the heat exchange part and is connected to the heat exchange part, and the heat exchange part is tilted from top to bottom as a whole, and the end away from the air inlet part is the lowest end; and

[0008] An air outlet portion is fixedly mounted on one end of the heat exchange portion away from the air inlet portion, the air outlet portion comprises an air outlet cavity, a separation cavity is arranged in the air outlet cavity, the air outlet cavity is connected to the heat exchange portion, and an air outlet pipe and a liquid outlet pipe are respectively arranged at the top and the bottom of the air outlet cavity.

[0009] The gas separated by heating up the preheating device is input into the heat exchange component through the pipeline, that is, the gas enters the air intake cavity through the air intake pipe of the air intake part, and the gas entering the air intake cavity flows slowly in the cavity and fills the air intake cavity. In this process, the flow velocity and kinetic energy loss can be reduced, thereby achieving the effect of buffering the gas flow. Then the gas enters the heat exchange part, and fully exchanges heat with the heat exchange medium in the heat exchange part. At this time, the moisture and essential oil components in the gas are liquefied and separated from the gas. The screened gas enters the air outlet part through the heat exchange part and is discharged through the air outlet pipe. Since the heat exchange part is tilted from top to bottom as a whole, the separated liquid components will flow into the air outlet cavity and be discharged through the liquid outlet pipe.

[0010] Furthermore, the heat exchange unit includes

[0011] The heat exchange cylinder is tilted from top to bottom as a whole, the air inlet cavity is fixedly mounted at the maximum height end of the heat exchange cylinder, the air outlet cavity is fixedly mounted at the minimum height end of the heat exchange cylinder, and a liquid inlet pipe and a liquid discharge pipe are respectively arranged at the top and bottom of the heat exchange cylinder;

[0012] A gas pipeline, wherein the gas pipeline is provided in a plurality of groups, and the plurality of groups of gas pipelines are evenly arranged inside the heat exchange cylinder parallel to the axis of the heat exchange cylinder; and

[0013] The partition is sealed in both ends of the heat exchange tube, and the partition forms a seal with the inner wall of the heat exchange tube. The gas pipeline passes through the partition and is connected with the air inlet and the air outlet, and the gas pipeline forms a seal with the partition.

[0014] The multiple groups of gas pipelines are fully wrapped by the heat exchange medium filled in the heat exchange cylinder, so that the gas in the gas pipeline can fully exchange heat with the heat exchange medium, with high heat exchange efficiency and good gas-liquid separation effect.

[0015] Furthermore, the recovery device also includes a filter assembly, which is connected to the air outlet pipe of the above-mentioned heat exchange assembly.

[0016] Furthermore, the filter assembly includes an air duct, the air duct has a channel for gas flow, and has an air inlet and an air outlet at both ends of the air duct. The air inlet is connected to the above-mentioned air outlet pipe. In the channel, a drying plate, an activated carbon plate and an ionization filter are arranged in sequence from the air inlet to the air outlet, and the above-mentioned drying plate, activated carbon plate and ionization filter are each provided with at least one group.

[0017] The preliminarily screened gas enters the filter assembly, where the moisture in the gas is removed by the drying plate, the impurities in the gas are adsorbed by the activated carbon plate, and the impurities in the gas are further adsorbed and removed by the ionization filter, thereby purifying the gas, improving the purity of the gas, and removing impurities or moisture in the gas that are difficult to remove by heat exchange.

[0018] Furthermore, a pump body is provided in the channel to drive the gas to flow, and the pump body drives the gas to flow, providing power for the gas flow, so as to avoid the gas having difficulty in flowing due to insufficient pressure, thereby affecting the filtering efficiency.

[0019] Furthermore, an ultraviolet sterilization lamp is also arranged in the channel to remove microorganisms that may exist in the gas through irradiation of the ultraviolet sterilization lamp, thereby preventing the microorganisms from existing in the gas and causing the microorganisms to be mixed in the extracted essential oil.

[0020] Furthermore, a circulating air duct is provided below the passage;

[0021] A baffle is provided between the activated carbon plate and the ionization filter, the baffle forms a seal with the channel, and a connecting air port is opened in the middle of the baffle, and the channel is connected through the connecting air port;

[0022] A circulating air outlet connecting the above-mentioned channel and the circulating air duct is provided on the side of the baffle away from the activated carbon plate, and a circulating air inlet connected to the circulating air duct is provided near the air outlet of the channel;

[0023] An exhaust valve is provided between the air outlet and the circulating air inlet, and a circulating valve is provided between the connecting air port and the circulating air outlet.

[0024] The air outlet is closed by the exhaust valve and the air outlet tank is connected by the circulation valve, so that a circulation passage is formed inside the filter component, which allows the gas to circulate in the filter component and realize multiple filtration and sterilization of the gas.

[0025] The utility model has the following advantages:

[0026] The gas separated by heating up the preheating device is input into the heat exchange component through the pipeline, that is, the gas enters the air intake cavity through the air intake pipe of the air intake part, and the gas entering the air intake cavity flows slowly in the cavity and fills the air intake cavity. In this process, the flow velocity and kinetic energy loss can be reduced, thereby achieving the effect of buffering the gas flow. Then the gas enters the heat exchange part, and fully exchanges heat with the heat exchange medium in the heat exchange part. At this time, the moisture and essential oil components in the gas are liquefied and separated from the gas. The screened gas enters the air outlet part through the heat exchange part and is discharged through the air outlet pipe. Since the heat exchange part is tilted from top to bottom as a whole, the separated liquid components will flow into the air outlet cavity and be discharged through the liquid outlet pipe.

[0027] The multiple groups of gas pipelines are fully wrapped by the heat exchange medium filled in the heat exchange cylinder, so that the gas in the gas pipeline can fully exchange heat with the heat exchange medium, with high heat exchange efficiency and good gas-liquid separation effect.

[0028] The preliminarily screened gas enters the filter assembly, where the moisture in the gas is removed by the drying plate, the impurities in the gas are adsorbed by the activated carbon plate, and the impurities in the gas are further adsorbed and removed by the ionization filter, thereby purifying the gas, improving the purity of the gas, and removing impurities or moisture in the gas that are difficult to remove by heat exchange.

[0029] The pump body drives the gas flow and provides power for the gas flow, so as to avoid the gas from having difficulty in flowing due to insufficient pressure and affecting the filtration efficiency. The ultraviolet sterilization lamp is used to remove the microorganisms that may exist in the gas, so as to avoid the presence of microorganisms in the gas and causing the microorganisms to mix in the extracted essential oil.

[0030] The air outlet is closed by the exhaust valve and the air outlet tank is connected by the circulation valve, so that a circulation passage is formed inside the filter component, which allows the gas to circulate in the filter component and realize multiple filtration and sterilization of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the connection between the recovery device, the extraction device and the preheating device;

[0032] Figure 2 yes Figure 1 A schematic diagram of the structure of the heat exchange component in the recovery device shown;

[0033] Figure 3 yes Figure 2 A schematic diagram of the internal structure of the heat exchange component shown;

[0034] Figure 4 yes Figure 1 A schematic diagram of the structure of the filter assembly in the recovery device shown;

[0035] Figure 5 yes Figure 4 A longitudinal cross-sectional schematic diagram of the filter assembly shown;

[0036] In the figure:

[0037] 100. Supercritical carbon dioxide extraction equipment;

[0038] 200. Preheating device;

[0039] 300, heat exchange assembly; 310, heat exchange part; 311, heat exchange cylinder; 312, liquid inlet pipeline; 313, liquid discharge pipeline; 314, gas pipeline; 315, partition; 320, air inlet part; 321, air inlet pipeline; 322, air inlet cavity; 330, air outlet part; 331, air outlet pipeline; 332, liquid outlet pipeline; 333, air outlet cavity;

[0040] 400, filter assembly; 401, air duct; 402, channel; 403, drying plate; 404, exhaust valve; 405, activated carbon plate; 406, ultraviolet germicidal lamp; 407, ionization filter; 408, pump body; 409, circulating air duct; 410, baffle; 411, circulating valve. DETAILED DESCRIPTION

[0041] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0042] In this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0043] As described in the background technology, existing essential oil extraction often uses a supercritical carbon dioxide extraction device to extract the essential oil from the material to be extracted. After the essential oil is extracted, the essential oil and the carbon dioxide are separated by heating. At this time, the carbon dioxide retains a certain amount of heat, resulting in the essential oil still containing gaseous moisture and essential oil components, which easily causes the recovered carbon dioxide to be impure and not conducive to use.

[0044] Embodiment 1:

[0045] Therefore, in order to solve the above technical problems, this embodiment proposes a carbon dioxide recovery device for supercritical carbon dioxide extraction equipment, such as Figure 1 As shown, the recovery device includes a heat exchange component 300, which is connected to the preheating device 200. The heat exchange component 300 can cool the carbon dioxide discharged from the preheating device to separate the carbon dioxide from impurities;

[0046] like Figure 2 , 3 As shown, the heat exchange component 300 includes

[0047] An air inlet portion 320, which is connected to the heat exchange assembly 300, and includes an air inlet cavity 322, wherein a cavity capable of buffering gas is provided in the air inlet cavity 322, and an air inlet pipe 321 is provided at the end of the air inlet cavity 322;

[0048] The heat exchange part 310, the air inlet part 320 is fixedly mounted at one end of the heat exchange part 310 and is connected to the heat exchange part 310, the heat exchange part 310 is tilted from top to bottom as a whole, and the end away from the air inlet part 320 is the lowest end; and

[0049] The air outlet part 330 is fixedly installed at one end of the above-mentioned heat exchange part 310 away from the air inlet part. The air outlet part 330 includes an air outlet cavity 333. A separation cavity is provided in the air outlet cavity 333. The air outlet cavity 333 is connected to the above-mentioned heat exchange part 310. An air outlet pipe 331 and a liquid outlet pipe 332 are respectively provided at the top and the bottom of the air outlet cavity 333.

[0050] In this embodiment, the gas separated by heating by the preheating device 200 is input into the heat exchange component through a pipeline, that is, the gas enters the air intake chamber 322 through the air intake pipe 321 of the air intake part, and the gas entering the air intake chamber 322 flows slowly in the cavity and fills the air intake chamber. In this process, the flow velocity and kinetic energy loss can be reduced, thereby achieving the effect of buffering the gas flow. Then the gas enters the heat exchange part 310, and fully exchanges heat with the heat exchange medium in the heat exchange part 310. At this time, the moisture and essential oil components in the gas are liquefied and separated from the gas. The screened gas enters the air outlet part 330 through the heat exchange part, and is discharged through the air outlet pipe 331. Since the heat exchange part is tilted from top to bottom as a whole, the separated liquid component will flow into the air outlet chamber and be discharged through the liquid outlet pipe 332.

[0051] This embodiment realizes the separation of water and essential oil in the gas, making the gas more pure and facilitating the recycling of the gas.

[0052] like Figure 3 As shown, the heat exchange part 310 in this embodiment includes

[0053] The heat exchange tube 311 is tilted from top to bottom as a whole, the air inlet chamber 322 is fixedly installed at the maximum height end of the heat exchange tube 311, the air outlet chamber 333 is fixedly installed at the minimum height end of the heat exchange tube, and a liquid inlet pipe 312 and a liquid discharge pipe 313 are respectively provided at the top and bottom of the heat exchange tube;

[0054] A gas pipeline 314, wherein the gas pipeline 314 is provided in a plurality of groups, and the plurality of groups of gas pipelines are evenly arranged inside the heat exchange tube 311 parallel to the axis of the heat exchange tube 311; and

[0055] The partition 315 is sealed inside the two ends of the heat exchange tube 311, and the partition 315 forms a seal with the inner wall of the heat exchange tube 311. The gas pipeline 314 passes through the partition 315 and is connected with the air inlet and the air outlet, and the gas pipeline 314 forms a seal with the partition.

[0056] Heat exchange medium is input into the heat exchange cylinder through the liquid inlet pipe, and the multiple groups of gas pipelines 314 are fully wrapped by the heat exchange medium filled in the heat exchange cylinder, so that the gas in the gas pipeline can fully exchange heat with the heat exchange medium, with high heat exchange efficiency and good gas-liquid separation effect.

[0057] It should be noted that the above-mentioned heat exchange medium is a medium with a preset cooling capacity, and the medium can be a fluid-like liquid or gas that has been reduced to a preset temperature, such as water, nitrogen, etc.

[0058] In this embodiment, the above-mentioned gas pipeline can be set up in a group. At this time, the shape of the gas pipeline is not limited. It can be set parallel to the axis of the heat exchange tube or in a spiral disk shape. At this time, in order to improve the recovery efficiency, it is necessary to increase the diameter of the gas pipeline to provide a sufficiently large space for gas flow. However, as the diameter of the gas pipeline increases, the gas volume in the unit pipeline increases, which will make it difficult to transfer heat to the gas at the center of the pipeline, and the heat exchange efficiency is greatly reduced. Therefore, in order to ensure the gas recovery efficiency, the above-mentioned method of setting multiple groups of gas pipelines parallel to the axis of the heat exchange tube is preferred. This method can not only improve the gas heat exchange efficiency, but also accommodate a larger number of gas exchanges, thereby maximizing the recovery efficiency.

[0059] Embodiment 2:

[0060] After a large amount of moisture or impurities are removed by the heat exchange component in Example 1, a small amount of moisture and essential oil still exist in the gas, which are difficult to remove by heat exchange. At the same time, dust, microorganisms and other substances that may affect the quality of the essential oil in the future may also exist in the gas.

[0061] Therefore, in order to solve this technical problem, Figure 1 As shown, this embodiment is based on Embodiment 1, and a filter assembly 400 is further provided in the recovery device, and the filter assembly 400 is connected to the air outlet pipe of the above-mentioned heat exchange assembly 300.

[0062] like Figure 4 , 5As shown, the filter assembly includes an air duct 401, the air duct 401 has a channel 402 for gas flow, and has an air inlet and an air outlet at both ends of the air duct 401. The air inlet is connected to the above-mentioned air outlet pipe, and a drying plate 403, an activated carbon plate 405 and an ionization filter 407 are arranged in sequence from the air inlet to the air outlet in the channel 402. The above-mentioned drying plate 403, activated carbon plate and ionization filter are each provided with at least one group.

[0063] The preliminarily screened gas enters the filter assembly, where the moisture in the gas is removed by the drying plate, the impurities in the gas are adsorbed by the activated carbon plate, and the impurities in the gas are further adsorbed and removed by the ionization filter, thereby purifying the gas, improving the purity of the gas, and removing impurities or moisture in the gas that are difficult to remove by heat exchange.

[0064] like Figure 5 As shown, a pump body 408 for driving the gas flow is also provided in the channel. The pump body drives the gas flow, provides power for the gas flow, and avoids the gas from having difficulty in flowing due to insufficient pressure of the gas itself, thereby affecting the filtering efficiency.

[0065] In this embodiment, an ultraviolet sterilization lamp 406 is further provided in the channel. The ultraviolet sterilization lamp 406 removes microorganisms that may exist in the gas, thereby preventing the microorganisms from being mixed in the extracted essential oil.

[0066] In addition, if Figure 5 As shown, a circulating air duct 409 is provided below the passage;

[0067] A baffle 410 is provided between the activated carbon plate 405 and the ionization filter 407, the baffle 410 forms a seal with the channel, and a connecting air port is opened in the middle of the baffle 410, through which the channel is connected;

[0068] A circulating air outlet connecting the above-mentioned channel and the circulating air duct is provided on the side of the baffle 410 away from the activated carbon plate, and a circulating air inlet connected to the circulating air duct is provided near the air outlet of the channel;

[0069] An exhaust valve 404 is provided between the air outlet and the circulating air inlet, and a circulating valve 411 is provided between the connecting air port and the circulating air outlet.

[0070] The exhaust valve 404 closes the air outlet and the circulation valve connects the air outlet tank, so that a circulation passage is formed inside the filter assembly, and the gas can circulate in the filter assembly to achieve multiple filtration and sterilization of the gas. When the gas is discharged, it is only necessary to close the circulation air inlet through the exhaust valve and the circulation air outlet through the circulation valve.

[0071] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A carbon dioxide recovery device for supercritical carbon dioxide extraction equipment, characterized in that: The recovery device includes a heat exchange component, which is connected to the preheating device and can cool the carbon dioxide discharged from the preheating device to separate the carbon dioxide from impurities; The heat exchange component comprises An air intake part, which is connected to the heat exchange component, and includes an air intake cavity, in which a cavity capable of buffering gas is provided, and an air intake pipe is provided at the end of the air intake cavity; A heat exchange part, wherein the air inlet part is fixedly mounted at one end of the heat exchange part and is connected to the heat exchange part, and the heat exchange part is tilted from top to bottom as a whole, and the end away from the air inlet part is the lowest end; and An air outlet portion is fixedly mounted on one end of the heat exchange portion away from the air inlet portion, the air outlet portion comprises an air outlet cavity, a separation cavity is arranged in the air outlet cavity, the air outlet cavity is connected to the heat exchange portion, and an air outlet pipe and a liquid outlet pipe are respectively arranged at the top and the bottom of the air outlet cavity.

2. The carbon dioxide recovery device of the supercritical carbon dioxide extraction equipment according to claim 1, characterized in that: The heat exchange part includes The heat exchange cylinder is tilted from top to bottom as a whole, the air inlet cavity is fixedly mounted at the maximum height end of the heat exchange cylinder, the air outlet cavity is fixedly mounted at the minimum height end of the heat exchange cylinder, and a liquid inlet pipe and a liquid discharge pipe are respectively arranged at the top and bottom of the heat exchange cylinder; A gas pipeline, wherein the gas pipeline is provided in a plurality of groups, and the plurality of groups of gas pipelines are evenly arranged inside the heat exchange cylinder parallel to the axis of the heat exchange cylinder; and The partition is sealed in both ends of the heat exchange tube, and the partition forms a seal with the inner wall of the heat exchange tube. The gas pipeline passes through the partition and is connected with the air inlet and the air outlet, and the gas pipeline forms a seal with the partition.

3. The carbon dioxide recovery device of the supercritical carbon dioxide extraction equipment according to claim 1, characterized in that: The recovery device also includes a filter assembly, which is connected to the air outlet pipe of the heat exchange assembly.

4. The carbon dioxide recovery device of the supercritical carbon dioxide extraction equipment according to claim 3, characterized in that: The filter assembly includes an air duct, which has a channel for gas flow, and has an air inlet and an air outlet at both ends of the air duct. The air inlet is connected to the above-mentioned air outlet pipe. A drying plate, an activated carbon plate and an ionization filter are arranged in sequence from the air inlet to the air outlet in the channel, and the above-mentioned drying plate, activated carbon plate and ionization filter are each provided with at least one group.

5. The carbon dioxide recovery device of the supercritical carbon dioxide extraction equipment according to claim 4, characterized in that: A pump body for driving the gas flow is also arranged in the channel.

6. The carbon dioxide recovery device of the supercritical carbon dioxide extraction equipment according to claim 5, characterized in that: An ultraviolet sterilization lamp is also arranged in the passage.

7. The carbon dioxide recovery device of the supercritical carbon dioxide extraction equipment according to claim 6, characterized in that: A circulating air duct is provided below the passage; A baffle is provided between the activated carbon plate and the ionization filter, the baffle forms a seal with the channel, and a connecting air port is opened in the middle of the baffle, and the channel is connected through the connecting air port; A circulating air outlet connecting the above-mentioned channel and the circulating air duct is provided on the side of the baffle away from the activated carbon plate, and a circulating air inlet connected to the circulating air duct is provided near the air outlet of the channel; An exhaust valve is provided between the air outlet and the circulating air inlet, and a circulating valve is provided between the connecting air port and the circulating air outlet.

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