Separation equipment for supercritical CO2 extraction
By introducing structures such as spiral channels and stainless steel wire mesh fillers into supercritical CO2 extraction equipment, combined with centrifugal and gravity separation, the problems of unclear separation and low efficiency of existing equipment are solved, and more efficient separation and automated emissions are achieved.
Patent Information
- Application Number
- CN202422079223.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The existing supercritical CO2 extraction and separation equipment only adopts the principle of gravity separation, resulting in unclear separation and low separation efficiency.
The separation equipment including a separator and a separator intermediate tank is adopted, combined with spiral channels, stainless steel wire mesh packing and hot water jacket, the dual effects of centrifugal separation and gravity separation are achieved, and precise discharge is achieved through throttle valves and pulse discharge valves.
The separation efficiency is improved by 25%, the precise emission and automation of extracts are achieved, labor costs are reduced, and the application scope is expanded.
Smart Images
Figure CN223144177U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of supercritical extraction, in particular to the separation of supercritical extracts, and specifically to a separation device for supercritical CO2 extraction. Background Art
[0002] Existing supercritical CO2 extraction and separation devices generally use the principle of gravity separation. Due to structural limitations, separators that only use the principle of gravity separation have problems of incomplete separation and low separation efficiency. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a separation device for supercritical CO2 extraction in view of the problems existing in the prior art.
[0004] The purpose of the utility model is solved by the following technical solutions:
[0005] A separation device for supercritical CO2 extraction, characterized in that: the separation device includes a separation kettle and a separator intermediate tank. A mixed vapor inlet pipe is arranged on the separation kettle, a spiral channel spiraling downward is arranged on the inner wall of the separation kettle, and an air outlet pipe is arranged in the middle of the separation kettle. The mixed vapor inlet pipe is arranged opposite to the inlet of the spiral channel, and the bottom inlet of the air outlet pipe is not lower than the outlet of the spiral channel. The mixed vapor inlet pipe, the spiral channel, and the air outlet pipe form the steam inlet and separation section of the separation device; the separator intermediate tank is connected to the bottom of the separation kettle through a separation kettle discharge pipe with a separation kettle pulse discharge valve. A middle tank pulse discharge valve is arranged on the discharge pipe of the separator intermediate tank with a middle tank hot water jacket. The separator intermediate tank and the separation kettle pulse discharge valve and the middle tank pulse discharge valve on its upper and lower sides form the on-line discharge section of the separation device.
[0006] The spiral inclination angle range of the spiral channel is 45° - 75°, and a further preferred range is 55° - 65°.
[0007] The mixed vapor inlet pipe is tangent to the kettle body of the separation kettle.
[0008] The head at the top of the separation kettle is filled with stainless steel wire mesh packing, and the bottom-closed stainless steel wire mesh packing is connected to the top outlet of the air outlet pipe. A throttle valve is arranged on the air outlet pipe at the top of the head at the top of the separation kettle. The throttle valve and the stainless steel wire mesh packing form the packing section of the separation device.
[0009] The pore size of the stainless steel wire mesh packing is 400 mesh - 1000 mesh.
[0010] A hot water coil is arranged in the lower cavity of the separation kettle, and the hot water coil is located directly below the spiral channel and the air outlet pipe.
[0011] A separating kettle flap level gauge is provided on the kettle body of the separating kettle corresponding to the hot water coil, and the hot water coil and the separating kettle flap level gauge constitute the heat preservation and state preservation section of the separating equipment.
[0012] Both the hot water inlet and the hot water outlet of the hot water coil are located at the top of the hot water coil.
[0013] The cylindrical part of the separating kettle is wrapped with a separating kettle hot water jacket. The hot water inlet and the hot water outlet of the separating kettle hot water jacket are respectively located at the bottom and the upper part of the separating kettle. The top of the separating kettle hot water jacket reaches the mixed steam inlet pipe area, and the bottom wraps the bottom head of the separating kettle.
[0014] An intermediate tank flap level gauge is arranged outside the tank body of the separated material intermediate tank.
[0015] An intermediate tank hot water jacket is arranged outside the tank body of the separated material intermediate tank. The hot water inlet and the hot water outlet of the intermediate tank hot water jacket are respectively located at the bottom of the tank body and the top of the tank body of the separated material intermediate tank.
[0016] The utility model has the following advantages compared with the prior art:
[0017] The separating kettle adopted by the supercritical CO2 extraction and separation equipment provided by the utility model has the dual effects of centrifugal separation and gravity separation, can improve the separation efficiency by 25% compared with the conventional gravity separation equipment, and has the characteristics of accurate extraction material discharge, high automation degree, reduction of labor cost and improvement of economic benefit. In addition, through the setting of the heat preservation and state preservation section and the on-line discharge section, the discharge of the extraction material is smoother and more reasonable.
[0018] The supercritical CO2 extraction and separation equipment provided by the utility model adopts the form of a four-section vertical pressure vessel including a packing section, a steam inlet separation section, a heat preservation and state preservation section and an on-line discharge section, so that the application range of the separation equipment is wider. Description of the Drawings
[0019] Att Figure 1 is a schematic structural diagram of the separation equipment for supercritical CO2 extraction of the utility model;
[0020] Att Figure 2 is Figure 1 the schematic cross-sectional structure diagram of A-A of Att
[0021] Wherein: 1 - throttle valve; 2 - stainless steel wire mesh packing; 3 - mixed steam inlet pipe; 4 - separating kettle hot water jacket; 5 - spiral channel; 6 - gas outlet pipe; 7 - hot water coil; 8 - separating kettle flap level gauge; 9 - intermediate tank flap level gauge; 10 - separated material intermediate tank; 11 - intermediate tank pulse discharging valve; 12 - intermediate tank hot water jacket; 13 - separating kettle pulse discharging valve. Detailed Embodiment
[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this utility model will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed description will be omitted.
[0023] The terms "a", "an", "the", and "said" are used to denote the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.
[0024] As Figure 1-2 shown: A separation device for supercritical CO2 extraction, the separation device includes a separation kettle and a separated matter intermediate tank 10. A mixed vapor inlet pipe 3 is arranged on the separation kettle, a spiral channel 5 arranged spirally downward is arranged on the inner wall of the separation kettle, and an air outlet pipe 6 is arranged in the middle of the separation kettle. The mixed vapor inlet pipe 3 is arranged opposite to the inlet of the spiral channel 5 and the bottom inlet of the air outlet pipe 6 is not lower than the outlet of the spiral channel 5. Preferably, the mixed vapor inlet pipe 3 is arranged tangentially to the kettle body of the separation kettle. The mixed vapor inlet pipe 3, the spiral channel 5, and the air outlet pipe 6 constitute the steam inlet separation section of the separation device; the separated matter intermediate tank 10 is connected to the bottom of the separation kettle through a separation kettle discharge pipe with a separation kettle pulse discharge valve 13. An intermediate tank pulse discharge valve 11 is arranged on the separated matter discharge pipe of the separated matter intermediate tank 10 configured with an intermediate tank hot water jacket 12. The separated matter intermediate tank 10 and the separation kettle pulse discharge valve 13 and the intermediate tank pulse discharge valve 11 on its upper and lower sides constitute the on-line discharge section of the separation device.
[0025] In the above separation device, a stainless steel wire mesh packing 2 with a pore size of 400 mesh - 1000 mesh is filled in the head at the top of the separation kettle, and the bottom-closed stainless steel wire mesh packing 2 is connected to the top outlet of the air outlet pipe 6. A throttle valve 1 is arranged on the air outlet pipe at the top of the head at the top of the separation kettle. The throttle valve 1 and the stainless steel wire mesh packing 2 constitute the packing section of the separation device.
[0026] In the above-mentioned separation device, a hot water coil 7 is arranged in the lower cavity of the separation kettle. The hot water coil 7 is located directly below the spiral channel 5 and the gas outlet pipe 6. Both the hot water inlet and the hot water outlet of the hot water coil 7 are located at the top of the hot water coil 7. A flapper level gauge 8 for the separation kettle is provided on the kettle body of the separation kettle corresponding to the hot water coil 7. The hot water coil 7 and the flapper level gauge 8 for the separation kettle constitute the heat preservation and state preservation section of the separation device. It has been found in practice that the components of plant extracts are relatively complex, containing not only useful components but also substances such as phospholipids and waxes that are prone to agglomeration. When the temperature is low, they become gelatinous and are not easily discharged. The separation device provided by the present utility model is specially provided with a heat preservation and state preservation section. The hot water coil 7 is arranged in the kettle body of the separation kettle mainly to keep the temperature of the extract in a liquid state so that it is easy to discharge.
[0027] In the above-mentioned separation device, the column part of the separation kettle is wrapped with a hot water jacket 4 for the separation kettle. The hot water inlet and the hot water outlet of the hot water jacket 4 for the separation kettle are respectively located at the bottom and the upper part of the separation kettle. The top of the hot water jacket 4 for the separation kettle reaches the area of the mixed gas inlet pipe 3, and the bottom wraps the bottom head of the separation kettle.
[0028] In the above-mentioned separation device, a flapper level gauge 9 is arranged outside the tank body of the intermediate tank 10 for separated substances, and a hot water jacket 12 for the intermediate tank is arranged outside the tank body of the intermediate tank 10 for separated substances. The hot water inlet and the hot water outlet of the hot water jacket 12 for the intermediate tank are respectively located at the bottom and the top of the tank body of the intermediate tank 10 for separated substances.
[0029] The separation kettle and the intermediate tank 10 for separated substances of the separation device adopt a common support.
[0030] The working principle of a separation device for supercritical CO2 extraction provided by the present utility model will be described below through a specific embodiment.
[0031] As Figure 1-2 shown, a separation device for supercritical CO2 extraction includes a packing section, a steam inlet separation section, a heat preservation and state preservation section, and an on-line discharge section. Among them, the main bodies of the packing section, the steam inlet separation section, and the heat preservation and state preservation section are the separation kettle, and the main body of the on-line discharge section is the intermediate tank 10 for separated substances. Specifically, the packing section is composed of a throttle valve 1 and a stainless steel wire mesh packing 2; the steam inlet separation section is composed of a mixed gas inlet pipe 3, a hot water jacket 4 for the separation kettle, a spiral channel 5, and a gas outlet pipe 6; the heat preservation and state preservation section is composed of the hot water jacket 4 for the separation kettle, a hot water coil 7, and a flapper level gauge 8 for the separation kettle; the on-line discharge section is composed of a pulse discharging valve 13 for the separation kettle, a flapper level gauge 9 for the intermediate tank, an intermediate tank 10 for separated substances, a pulse discharging valve 11 for the intermediate tank, and a hot water jacket 12 for the intermediate tank.
[0032] The specific operating principle of the separation kettle part of a separation device for supercritical CO2 extraction provided by the present utility model is as follows: When the mixed vapor enters the separation kettle from the mixed vapor inlet pipe 3, the mixed vapor will run downward along the spiral channel 5. Since the mixed vapor inlet pipe 3 is tangent to the kettle body of the separation kettle, the mixed vapor will undergo centrifugal separation and the heavy extract will flow downward along the inner wall of the separation kettle body. The CO2 gas will flow upward through the gas outlet pipe 6 in the middle of the separation kettle to the packing section; the stainless steel wire mesh packing 2 has extremely fine pores (400 mesh - 1000 mesh), and CO2 molecules can easily pass through, while a small amount of heavy extract molecules mixed in the CO2 gas will be intercepted by the stainless steel wire mesh packing 2 and flow downward under gravity. A hot water jacket 4 for the separation kettle is provided outside the separation kettle body to prevent the CO2 mixed vapor from cooling due to volume expansion, ensure the separation temperature of the mixed vapor, and maximize the separation efficiency.
[0033] The specific operating principle of the on-line discharge section of a separation device for supercritical CO2 extraction provided by the present utility model is as follows: When the tipping level gauge 8 of the separation kettle in the heat preservation and state maintenance section detects that the liquid level of the separation kettle is high, the pulsed discharge valve 13 of the separation kettle is opened for discharging. When the tipping level gauge 8 of the separation kettle detects that the liquid level of the separation kettle is low, the pulsed discharge valve 13 of the separation kettle is closed; the extract enters the separation intermediate tank 10. Similarly, when the tipping level gauge 9 of the intermediate tank detects that the liquid level of the separation intermediate tank 10 is high, the pulsed discharge valve 11 of the intermediate tank is opened to discharge the separated material. When the tipping level gauge 9 of the intermediate tank detects that the liquid level of the separation intermediate tank 10 is low, the pulsed discharge valve 11 of the intermediate tank is closed. The use of two sets of pulsed valves here is mainly to ensure smooth pressure discharge and prevent impact. During the discharge process of the extract, the pressure is reduced sequentially from the heat preservation and state maintenance section to the on-line discharge section, which is beneficial to the on-line automatic continuous discharge of the extract. A hot water jacket 12 for the intermediate tank is provided outside the separation intermediate tank 10 to ensure that the extract has a certain temperature and maintain the fluidity of the extract for smooth discharge.
[0034] In the embodiments of the present utility model, the term "a plurality of" refers to two or more, unless otherwise clearly defined. Terms such as "installation", "connection", and "fixation" should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.
[0035] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the embodiments of the present utility model.
[0036] In the description of this specification, the descriptions of terms such as "one embodiment" and "one preferred embodiment" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0037] The above embodiments are only for illustrating the technical idea of the present utility model, and the protection scope of the present utility model cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present utility model falls within the protection scope of the present utility model; the technologies not involved in the present utility model can be realized by the existing technologies.
Claims
1. A separation device for supercritical CO2 extraction, characterized in that: The separation device includes a separation kettle and a separated material intermediate tank (10). A mixed vapor inlet pipe (3) is arranged on the separation kettle, a spiral channel (5) spiraling downward is arranged on the inner wall of the separation kettle, and an air outlet pipe (6) is arranged in the middle of the separation kettle. The mixed vapor inlet pipe (3) is arranged opposite to the inlet of the spiral channel (5), and the bottom inlet of the air outlet pipe (6) is not lower than the outlet of the spiral channel (5). The mixed vapor inlet pipe (3), the spiral channel (5), and the air outlet pipe (6) form the steam inlet separation section of the separation device; the separated material intermediate tank (10) is connected to the bottom of the separation kettle through a separation kettle discharge pipe with a separation kettle impulse discharge valve (13). An intermediate tank impulse discharge valve (11) is arranged on the separated material discharge pipe of the separated material intermediate tank (10) equipped with an intermediate tank hot water jacket (12). The separated material intermediate tank (10) and the separation kettle impulse discharge valve (13) and the intermediate tank impulse discharge valve (11) on its upper and lower sides form the on-line discharge section of the separation device.
2. The separation device for supercritical CO2 extraction according to claim 1, characterized in that: The mixed vapor inlet pipe (3) is tangent to the kettle body of the separation kettle.
3. The separation device for supercritical CO2 extraction according to claim 1, wherein: The head at the top of the separation kettle is filled with stainless steel wire mesh packing (2), and the stainless steel wire mesh packing (2) with a closed bottom is connected to the top outlet of the air outlet pipe (6). A throttle valve (1) is arranged on the air outlet pipe at the top of the head at the top of the separation kettle. The throttle valve (1) and the stainless steel wire mesh packing (2) form the packing section of the separation device.
4. The separation device for supercritical CO2 extraction according to claim 3, characterized in that: The pores of the stainless steel wire mesh packing (2) are 400 mesh - 1000 mesh.
5. The separation device for supercritical CO2 extraction according to claim 1, characterized in that: A hot water coil (7) is arranged in the lower cavity of the separation kettle, and the hot water coil (7) is located directly below the spiral channel (5) and the air outlet pipe (6).
6. The separation device for supercritical CO2 extraction according to claim 5, characterized in that: A separation kettle flap level gauge (8) is arranged on the kettle body of the separation kettle corresponding to the hot water coil (7). The hot water coil (7) and the separation kettle flap level gauge (8) form the heat preservation and state maintenance section of the separation device.
7. The separation device for supercritical CO2 extraction according to claim 5, characterized in that: Both the hot water inlet and the hot water outlet of the hot water coil (7) are located at the top of the hot water coil (7).
8. The separation device for supercritical CO2 extraction according to claim 1 or 5, characterized in that: The column part of the separation kettle is wrapped with a separation kettle hot water jacket (4). The hot water inlet and the hot water outlet of the separation kettle hot water jacket (4) are respectively located at the bottom and the upper part of the separation kettle; the top of the separation kettle hot water jacket (4) reaches the area of the mixed vapor inlet pipe (3), and the bottom wraps the bottom head of the separation kettle.
9. The separation device for supercritical CO2 extraction according to claim 1, characterized in that: An intermediate tank flap level gauge (9) is arranged outside the tank body of the separated material intermediate tank (10).
10. The separation device for supercritical CO2 extraction according to claim 1 or 9, characterized in that: An intermediate tank hot water jacket (12) is arranged outside the tank body of the separated material intermediate tank (10). The hot water inlet and the hot water outlet of the intermediate tank hot water jacket (12) are respectively located at the bottom and the top of the tank body of the separated material intermediate tank (10).