Dedusting and filtering equipment for supercritical CO2 extraction

Abstract

The utility model discloses dust removal filtering equipment for supercritical CO2 extraction, which comprises a steam inlet filtering section based on a cyclone separator and a powder liquid discharge section based on an isolate intermediate tank, a mixed steam inlet pipe is arranged on a spherical sealing head at the top of the cyclone separator, a filter assembly is arranged in the middle of an inner cavity of the cyclone separator, and an outlet of the filter assembly upwards penetrates out of a gas outlet of the cyclone separator; the separator intermediate tank is connected with the bottom of the cyclone separator through a discharge pipe with an intermediate pulse discharge valve; and an intermediate tank pulse discharge valve is arranged on the separator discharge pipe of the separator intermediate tank provided with an intermediate tank hot water jacket. The whole dedusting and filtering equipment adopts a steel structure in sealed connection, dust-free mixed steam is discharged from the inner cavity of the filter inner cylinder, and dust-containing and separated liquid is discharged from the powder-liquid discharge section, so that the problem of filtering dust and impurities in supercritical CO2 extraction is solved, and the subsequent separation is purer.

Description

Technical Field

[0001] The utility model relates to the technical field of supercritical extraction, in particular to dust removal and filtration of supercritical extraction, specifically to a dust removal and filtration device for supercritical CO2 extraction. Background Art

[0002] Currently, the dust removal equipment available on the market is generally designed for low-pressure or no-pressure dust collection, usually including bag dust collectors and filter dust collectors. The supercritical CO2 extraction process requires the dust removal equipment to be able to withstand a pressure of about 25MPa, so the existing dust removal equipment is not suitable for use in the supercritical CO2 extraction process. Utility Model Content

[0003] The purpose of the utility model is to provide a dust removal and filtering device for supercritical CO2 extraction in order to solve the problems existing in the prior art.

[0004] The purpose of this utility model is solved by the following technical solutions:

[0005] A dust removal and filtering device for supercritical CO2 extraction is characterized in that: the dust removal and filtering device includes a steam inlet filtration section based on a cyclone separator and a powder and liquid discharge section based on a separator intermediate tank, a mixed steam inlet pipe is arranged on the spherical head at the top of the cyclone separator, and a filter assembly is provided in the middle of the inner cavity of the cyclone separator, and the outlet of the filter assembly passes upward through the air outlet of the cyclone separator; the separator intermediate tank is connected to the bottom of the cyclone separator through a discharge pipe with an intermediate pulse discharge valve, and an intermediate tank pulse discharge valve is arranged on the separation discharge pipe of the separator intermediate tank equipped with an intermediate tank hot water jacket.

[0006] The mixed steam inlet pipe is tangentially arranged on the spherical head and is tilted downward; an air intake throttle valve is arranged on the mixed steam inlet pipe.

[0007] The mixed steam inlet pipe is tilted downward by 10°-30° to improve feeding efficiency.

[0008] The filter assembly consists of a filter inner cylinder, a filter outer cylinder and a middle filter bag. The filter inner cylinder is located in the inner cavity of the filter outer cylinder and the middle filter bag is arranged in the annular cavity between the filter inner cylinder and the filter outer cylinder.

[0009] The intermediate filter bag is a polytetrafluoroethylene filter bag with a pore size of 2000 meshes.

[0010] An air outlet throttle valve is provided on the portion of the filter inner cylinder that passes upward through the air outlet of the cyclone separator.

[0011] A separator hot water jacket is arranged outside the shell of the cyclone separator, and a hot water inlet and a hot water outlet of the separator hot water jacket are respectively located at the bottom of the cyclone separator and the bottom of the spherical head.

[0012] A tundish tank flap level gauge is arranged outside the tank body of the separator tundish.

[0013] The hot water inlet and the hot water outlet of the hot water jacket of the intermediate tank are respectively located at the bottom and the top of the tank body of the separator intermediate tank.

[0014] A receiving tank is arranged between the cyclone separator and the separator intermediate tank, and the intermediate pulse discharge valve is located on the discharge pipe between the receiving tank and the separator intermediate tank.

[0015] A receiving tank hot water jacket is arranged outside the shell of the receiving tank, and the hot water inlet and hot water outlet of the receiving tank hot water jacket are respectively located at the bottom and top of the tank body of the receiving tank; a receiving tank flap liquid level gauge is arranged outside the tank body of the receiving tank.

[0016] The steel structure cyclone separator, receiving tank, separation intermediate tank and connecting parts are sealed and connected with octagonal gaskets.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The dust removal and filtering equipment of the present invention adopts a steel structure and an octagonal gasket sealing connection as a whole, so that the dust removal and filtering equipment can withstand a pressure of up to 25MPa. The structure of the dust removal and filtering equipment is divided into a steam inlet filtering section and a powder-liquid discharge section. The dust-containing mixed steam enters the steam inlet filtering section for high-pressure cyclone separation, and then passes through the filter component to further retain the dust. The dust-free mixed steam is discharged from the inner cavity of the filter inner cylinder, and the dust-containing and separated liquid are discharged together from the powder-liquid discharge section; the dust removal and filtering equipment solves the problem of dust and impurity filtration in supercritical CO2 extraction, makes subsequent separation purer, can realize production automation, use less labor, save labor costs, and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attachment Figure 1 This is a schematic structural diagram of the dust removal and filtration equipment for supercritical CO2 extraction of the present invention;

[0020] Attachment Figure 2 For attachment Figure 1 AA cross-sectional structural diagram in;

[0021] Attachment Figure 3 For attachment Figure 1 Schematic diagram of the enlarged structure of part B in FIG.

[0022] Among them: 1—air outlet; 2—air inlet throttle valve; 3—mixed steam inlet pipe; 4—separator hot water jacket; 5—receiving tank flap level gauge; 6—receiving tank hot water jacket; 7—intermediate tank flap level gauge; 8—intermediate tank hot water jacket; 9—intermediate tank pulse discharge valve; 10—separator intermediate tank; 11—intermediate pulse discharge valve; 12—receiving tank; 13—cyclone separator; 14—spherical head; 15—filter assembly; 151—filter inner cylinder; 152—filter outer cylinder; 153—intermediate filter bag; 16—air outlet throttle valve. DETAILED DESCRIPTION

[0023] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0024] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0025] like Figure 1-3 As shown: A dust removal and filtering equipment for supercritical CO2 extraction, the dust removal and filtering equipment includes a steam inlet filtration section based on a cyclone separator 13 and a powder and liquid discharge section based on a separator intermediate tank 10, a mixed steam inlet pipe 3 is arranged on the spherical head 14 at the top of the cyclone separator 13, and a filter assembly 15 is provided in the middle of the inner cavity of the cyclone separator 13, and the outlet of the filter assembly 15 passes upward through the air outlet 1 of the cyclone separator 13; the separator intermediate tank 10 is connected to the bottom of the cyclone separator 13 through a discharge pipe with an intermediate pulse discharge valve 11, and an intermediate tank pulse discharge valve 9 is arranged on the separation discharge pipe of the separator intermediate tank 10 equipped with an intermediate tank hot water jacket 8.

[0026] In the dust removal and filtering equipment of the above structure, the mixed steam inlet pipe 3 is tangentially arranged on the spherical head 14 and is inclined downward. In addition, an air intake throttle valve 2 is arranged on the mixed steam inlet pipe 3.

[0027] In the dust removal and filtering equipment of the above structure, the filter assembly 15 is composed of a filter inner cylinder 151, a filter outer cylinder 152 and an intermediate filter bag 153. The filter inner cylinder 151 is located in the inner cavity of the filter outer cylinder 152, and an outlet throttle valve 16 is provided on the part of the filter inner cylinder 151 that passes upward through the air outlet 1 of the cyclone separator 13. The intermediate filter bag 153 is arranged in the annular cavity between the filter inner cylinder 151 and the filter outer cylinder 152. The intermediate filter bag 153 is a polytetrafluoroethylene filter bag with a pore size of 2000 mesh, so that the mixed gas after dust removal and filtration is further purified.

[0028] In the dust removal and filtering equipment of the above structure, a separator hot water jacket 4 is arranged outside the shell of the cyclone separator 13, and the hot water inlet and hot water outlet of the separator hot water jacket 4 are respectively located at the bottom of the cyclone separator 13 and the bottom of the spherical head 14.

[0029] In the dust removal and filtering equipment of the above structure, an intermediate tank flap level gauge 7 is arranged outside the tank body of the separator intermediate tank 10; the hot water inlet and hot water outlet of the intermediate tank hot water jacket 8 are respectively located at the bottom and top of the tank body of the separator intermediate tank 10.

[0030] In the dust removal and filtration equipment of the above structure, a receiving tank 12 is arranged between the cyclone separator 13 and the separator intermediate tank 10, and the intermediate pulse discharge valve 11 is located on the discharge pipe between the receiving tank 12 and the separator intermediate tank 10; a receiving tank hot water jacket 6 is arranged outside the shell of the receiving tank 12, and the hot water inlet and hot water outlet of the receiving tank hot water jacket 6 are respectively located at the bottom and top of the tank body of the receiving tank 12; a receiving tank flap liquid level gauge 5 is arranged outside the tank body of the receiving tank 12.

[0031] The working principle of the dust removal and filtration equipment for supercritical CO2 extraction provided by the present invention is explained below through a specific embodiment.

[0032] like Figure 1-3 The dust removal and filtering equipment shown is used for supercritical CO2 extraction, which includes a steam inlet filtration section based on a cyclone separator 13 and a powder and liquid discharge section based on a separator intermediate tank 10, specifically: a steam inlet filtration section consisting of an air outlet 1, an air inlet throttle valve 2, a mixed steam inlet pipe 3, a separator hot water jacket 4, a cyclone separator 13, a spherical head 14, a filter assembly 15 and an air outlet throttle valve 16, wherein the filter assembly 15 consists of a filter inner cylinder 151, a filter outer cylinder 152 and an intermediate filter bag 153; a powder and liquid discharge section consisting of a receiving tank flap level gauge 5, a receiving tank hot water jacket 6, an intermediate tank flap level gauge 7, an intermediate tank hot water jacket 8, an intermediate tank pulse discharge valve 9, a separator intermediate tank 10, a receiving tank pulse discharge valve 11 and a receiving tank 12.

[0033] The present invention provides a dust removal and filtration device for supercritical CO2 extraction, and the operating principle of the steam inlet filtration section is as follows: a dust-laden mixed gas passes through the throttle valve 2 on the mixed gas inlet pipe 3 and enters the cyclone separator 13 for cyclonic centrifugal separation. Dust remains on the inner wall of the cyclone separator 13, and the mixed gas is then discharged through the filter assembly 15 and the throttle valve 16 to the subsequent separator. The cyclone separator 13 is provided with a separator hot water jacket 4 to prevent the dust-laden CO2 mixed gas from cooling due to volume expansion. In addition to separating the dust from the dust-laden mixed gas in the cyclone separator 13, some liquid extract is typically also separated, forming a powder-liquid mixture. The filter inner cylinder 151 and filter outer cylinder 152 in the filter assembly 15 are both strong enough to withstand the impact of the high-pressure mixed gas flow. The intermediate filter bag 153, a 2000-mesh polytetrafluoroethylene filter bag, installed between the filter inner cylinder 151 and the filter outer cylinder 152, further purifies the mixed gas after dust removal and filtration.

[0034] The powder-liquid discharge section of the dust removal and filtration equipment for supercritical CO2 extraction, provided in this utility model, operates as follows: the powder-liquid mixture flows downward by gravity into a receiving tank 12. When the receiving tank flap level gauge 5, mounted on receiving tank 12, detects a high liquid level, the intermediate pulse discharge valve 11 is opened. When the receiving tank flap level gauge 5 detects a low liquid level, the intermediate pulse discharge valve 11 is closed, allowing the powder-liquid mixture to enter the separation intermediate tank 10. Similarly, when the intermediate tank flap level gauge 7 detects a high liquid level, the intermediate tank pulse discharge valve 9 is opened. When the intermediate tank flap level gauge 7 detects a low liquid level, the intermediate tank pulse discharge valve 9 is closed, achieving automatic and continuous discharge of the powder-liquid mixture. The two sets of pulse valves employed here primarily ensure smooth pressure discharge and prevent shock. During the discharge process, the powder-liquid mixture is sequentially depressurized (≤25MPa - approximately 10MPa - 0MPa) from the steam inlet filtration section to the powder-liquid discharge section, facilitating discharge. The receiving tank hot water jacket 6 outside the receiving tank 12 and the intermediate tank hot water jacket 8 outside the separator intermediate tank 10 are both used to ensure that the powder-liquid mixture has a certain temperature and maintains the fluidity of the powder and liquid for smooth discharge.

[0035] The dust removal and filtration equipment provided by the utility model realizes high-pressure dust removal and filtration during the extraction process, improves the purity of the extract, and provides convenience for subsequent further processing.

[0036] In the embodiments of the present invention, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art will understand the specific meanings of these terms in the embodiments of the present invention based on the specific circumstances.

[0037] In the description of the embodiments of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention 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 direction. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0038] Throughout this specification, terms such as "one embodiment" and "a preferred embodiment" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0039] The above embodiments are only for illustrating the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention; any technology not involved in the present invention can be realized by existing technology.

Claims

1. A dust removal and filtration device for supercritical CO2 extraction, characterized by: The dust removal and filtering equipment comprises a steam inlet filtration section based on a cyclone separator (13) and a powder-liquid discharge section based on a separator intermediate tank (10); a mixed steam inlet pipe (3) is arranged on a spherical head (14) at the top of the cyclone separator (13); a filter assembly (15) is provided in the middle of the inner cavity of the cyclone separator (13); the outlet of the filter assembly (15) passes upward through the gas outlet (1) of the cyclone separator (13); the separator intermediate tank (10) is connected to the bottom of the cyclone separator (13) through a discharge pipe with an intermediate pulse discharge valve (11); and an intermediate tank pulse discharge valve (9) is arranged on the separator discharge pipe of the separator intermediate tank (10) equipped with an intermediate tank hot water jacket (8).

2. The dust removal and filtering equipment for supercritical CO2 extraction according to claim 1, characterized in that: The mixed steam inlet pipe (3) is tangentially arranged on the spherical head (14) and is arranged obliquely downward; an air intake throttle valve (2) is arranged on the mixed steam inlet pipe (3).

3. The dust removal and filtration equipment for supercritical CO2 extraction according to claim 1 or 2, characterized in that: The filter assembly (15) is composed of a filter inner cylinder (151), a filter outer cylinder (152) and an intermediate filter bag (153), wherein the filter inner cylinder (151) is located in the inner cavity of the filter outer cylinder (152) and the intermediate filter bag (153) is arranged in an annular cavity between the filter inner cylinder (151) and the filter outer cylinder (152).

4. The dust removal and filtration equipment for supercritical CO2 extraction according to claim 3, characterized in that: The intermediate filter bag (153) is a polytetrafluoroethylene filter bag, and the pore size of the polytetrafluoroethylene filter bag is 2000 meshes.

5. The dust removal and filtration equipment for supercritical CO2 extraction according to claim 3, characterized in that: An air outlet throttle valve (16) is provided on the portion of the filter inner cylinder (151) that passes upward through the air outlet (1) of the cyclone separator (13).

6. The dust removal and filtration equipment for supercritical CO2 extraction according to claim 1 or 2, characterized in that: A separator hot water jacket (4) is arranged outside the shell of the cyclone separator (13), and a hot water inlet and a hot water outlet of the separator hot water jacket (4) are respectively located at the bottom of the cyclone separator (13) and the bottom of the spherical head (14).

7. The dust removal and filtration equipment for supercritical CO2 extraction according to claim 1, characterized in that: An intermediate tank flap level gauge (7) is arranged outside the tank body of the separator intermediate tank (10).

8. The dust removal and filtration equipment for supercritical CO2 extraction according to claim 1, characterized in that: The hot water inlet and the hot water outlet of the intermediate tank hot water jacket (8) are respectively located at the bottom and the top of the tank body of the separator intermediate tank (10).

9. The dust removal and filtration equipment for supercritical CO2 extraction according to any one of claims 1, 7, and 8, characterized in that: A receiving tank (12) is arranged between the cyclone separator (13) and the separator intermediate tank (10), and the intermediate pulse discharge valve (11) is located on the discharge pipe between the receiving tank (12) and the separator intermediate tank (10).

10. The dust removal and filtering equipment for supercritical CO2 extraction according to claim 9, characterized in that: A receiving tank hot water jacket (6) is arranged outside the shell of the receiving tank (12), and a hot water inlet and a hot water outlet of the receiving tank hot water jacket (6) are respectively located at the bottom and the top of the tank body of the receiving tank (12); and a receiving tank flap level gauge (5) is arranged outside the tank body of the receiving tank (12).

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