CN114904292A

CN114904292A - Supercritical extraction kettle

Info

Publication number: CN114904292A
Application number: CN202210357847.XA
Authority: CN
Inventors: 徐卫华; 周财华; 熊启川
Original assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Current assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-08-16
Anticipated expiration: 2042-04-06
Also published as: CN114904292B

Abstract

The invention relates to a supercritical extraction kettle, which comprises: the device comprises a reaction kettle extraction mechanism and an extraction powder recovery mechanism. The extraction powder recovery mechanism is used for intercepting and recovering fine powder materials carried in carbon dioxide discharged from the interior of the reaction kettle extraction mechanism. Reation kettle extracts mechanism includes: extraction reation kettle main part, reactant agitating unit, pan feeding mouth and bin outlet. The reactant stirring device is arranged on the extraction reaction kettle main body. The pan feeding mouth sets up the side on extraction reation kettle main part top. The discharge gate sets up the bottom at the extraction reation kettle main part. The extraction powder recovery mechanism comprises: the device comprises a gas discharge assembly, an extract backflow assembly, a spray dust collecting assembly and a secondary filtering and collecting assembly. The present invention is advantageous in that it is possible to perform multiple filtration of the powder material mixed in the discharged carbon dioxide. The extracted substance is collected to the maximum extent. Avoiding the loss of the extracted substances. The quality of the extraction reaction meets the standard requirement.

Description

Supercritical extraction kettle

Technical Field

The invention relates to the technical field of extraction kettles, in particular to a supercritical extraction kettle.

Background

Extraction is also known as solvent extraction or liquid-liquid extraction. Is a unit operation that takes advantage of the different solubilities of the components in the system in the solvent to separate the mixture. I.e. by using the difference in solubility or partition coefficient of substances in two mutually immiscible (or sparingly soluble) solvents. A method for transferring solute material from one solvent to another solvent. The method is widely applied to chemical, metallurgical, food and other industries and is generally applied to petroleum refining industry. The operation of separating the two immiscible liquids after extraction is called liquid separation.

Although extraction is often used in chemical experiments, its operation does not result in a change (or chemical reaction) in the chemical composition of the extracted substance. The extraction operation is a physical process.

Extraction is one of the means used in organic chemistry laboratories to purify and purify compounds. The desired substance can be extracted from the solid or liquid mixture by extraction.

When the existing supercritical carbon dioxide extraction kettle extracts fine powder materials, part of the materials can be mixed in carbon dioxide gas and carried out while discharging carbon dioxide, so that the quality of products in the extraction kettle is reduced to some extent, the extraction reaction quality of the extraction kettle cannot meet the standard requirement, and the production and processing quality of the products is greatly influenced.

Disclosure of Invention

The invention aims to provide a supercritical extraction kettle to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a supercritical extraction tank, comprising: reaction kettle extraction mechanism and extraction powder recovery mechanism. The extraction powder recovery mechanism is used for intercepting and recovering fine powder materials carried in carbon dioxide discharged from the interior of the reaction kettle extraction mechanism. Reation kettle extracts mechanism includes: extraction reation kettle main part, reactant agitating unit, pan feeding mouth and bin outlet. The reactant stirring device is arranged on the extraction reaction kettle main body. The pan feeding mouth sets up the side on extraction reation kettle main part top. The discharge gate sets up the bottom at the extraction reation kettle main part. The extraction powder recovery mechanism comprises: the device comprises a gas discharge assembly, an extract backflow assembly, a spray dust collecting assembly and a secondary filtering and collecting assembly. The gas discharge assembly is arranged on the extraction reaction kettle main body and used for discharging carbon dioxide in the extraction reaction kettle main body. The extract backflow component is arranged on the gas discharge component and used for intercepting and recovering carbon dioxide containing powder substances discharged by the gas discharge component. The spraying dust collecting assembly is arranged on the gas discharging assembly. The secondary filtering and collecting component is arranged at the side of the gas discharging component and is used for further recovering mixed powder in the carbon dioxide gas.

As a further scheme of the invention: the gas discharge assembly includes: the mixed gas recovery bin, the exhaust pipeline, the exhaust hood, the exhaust hole and the side connecting plate. The mixed gas recovery bin is arranged above the extraction reaction kettle main body. The exhaust pipeline is vertically inserted at the top end of the extraction reaction kettle main body. The top end of the exhaust pipeline passes through the mixed gas recovery bin. The exhaust hood is arranged at the outlet of the exhaust pipeline. The exhaust holes are uniformly arranged on the exhaust cover. The side connecting plate sets up in the outside of exhaust hood, and the side connecting plate all is located the top in exhaust hole.

As a further scheme of the invention: the exhaust hood is in an inverted funnel shape which is convenient to flow away from the liquid.

As a further scheme of the invention: the side connecting plates are inclined to facilitate the liquid to flow away.

As a further scheme of the invention: the extract reflux assembly comprises: the gas slow flow net, the first backflow connecting pipe and the second backflow connecting pipe. The gas slow flow net is arranged in the mixed gas recovery bin. The gas slow flow net is positioned above the exhaust hood. The first backflow connecting pipe is arranged on one side of the bottom end of the mixed gas recovery bin and is used for communicating the mixed gas recovery bin with the extraction reaction kettle main body. The second backflow connecting pipe is arranged on the other side of the bottom end of the mixed gas recovery bin and is used for communicating the mixed gas recovery bin with the extraction reaction kettle main body.

As a further scheme of the invention: the spray dusting assembly comprises: the extraction liquid storage bin, the extraction water pump, the first connecting pipeline, the second connecting pipeline, the spraying fixing plate, the water mist spray head and the water delivery pipeline. The extraction liquid storage bin is arranged above the mixed gas recovery bin. The extraction water pump is arranged on the side of the extraction reaction kettle main body. The first connecting pipeline is communicated with the input end of the extraction water pump. The other end of the first connecting pipeline extends into the extraction reaction kettle main body. The second connecting pipeline is communicated with the output end of the extraction water pump, and the other end of the second connecting pipeline is communicated with the extraction liquid storage bin. The spraying fixing plate is arranged above the gas slow flow net. The water spray nozzle is arranged at the bottom side of the spraying fixing plate. The water pipe connects the water spray nozzle and the extract liquor storage bin.

As a further scheme of the invention: the second connecting pipeline is fixed on the extraction reaction kettle main body through a fixing clamp.

As a further scheme of the invention: the secondary filter collection assembly includes: the filter recovery bin, the annular gas passing pipe, the precision filter screen, the collection connecting pipe, the collection recovery pipe, the control valve, the powder collection bin, the vent pipe, the vent hole and the mixed gas through hole. The filtering recovery bin is arranged on the side of the mixed gas recovery bin. The annular gas is arranged in the filtering and recycling bin through a pipe. The fine filter screen is arranged in the pipe of the annular gas passing pipe and used for filtering the powder substances again. The collecting connecting pipe is communicated with the bottom end of the annular gas passing pipe. The collecting and recycling pipe is communicated with the collecting and connecting pipe. The bottom end of the collecting and recycling pipe passes through the filtering and recycling bin. The control valve is arranged on the collecting and recycling pipe. The powder collecting bin is arranged below the filtering and recovering bin. The bottom end of the collecting and recycling pipe is communicated with the powder collecting bin. The vent pipe is communicated with the annular gas through a pipe. The vent hole is arranged at the top end of the mixed gas recovery bin. The vent pipe is communicated with the vent hole. The mixed gas through hole is arranged on the spray fixing plate.

As a further scheme of the invention: the vent hole is obliquely arranged at the side corner of the top end of the mixed gas recovery bin.

As a further scheme of the invention: the annular gas is in a multi-section rotary bending shape through the pipe, and the annular gas penetrates out of the filtering and recycling bin through the tail end of the pipe. And the top end of the filtering and recycling bin is provided with a baffle plate for preventing dust from falling into the annular gas passing pipe.

Compared with the prior art, the invention has the beneficial effects that: it is possible to perform multiple filtration by mixing the powder material in the discharged carbon dioxide. The extracted substance is collected to the maximum extent. Avoiding the loss of the extracted substances. The quality of the extraction reaction meets the standard requirement.

By being provided with the extraction powder recovery mechanism. And an extract reflux assembly and a spray dust collecting assembly are arranged on the gas discharge assembly in the extraction powder recovery mechanism. The spraying dust collecting assembly can spray and reduce dust of mixed gas entering the mixed gas recovery bin. Thereby leading large-particle powder in the mixed gas to be gathered and flow back to the main body of the extraction reaction kettle through the spraying dust collecting component. And the loss of substances is reduced. And the secondary filtering and collecting component arranged on the side edge of the gas discharging component can further enhance the filtering of the mixed gas powder. The discharged carbon dioxide is cleaner. The recycling of the extracted substances is increased.

Other features and advantages of the present invention will be disclosed in more detail in the following detailed description of the invention and the accompanying drawings.

Drawings

FIG. 1 is a schematic structural diagram of a supercritical extraction kettle according to the present invention;

FIG. 2 is a schematic structural section view of a supercritical extraction kettle according to the present invention.

FIG. 3 is a schematic sectional view of the structure of the extraction powder recovery mechanism shown in FIG. 2 according to the present invention.

Fig. 4 is an enlarged view of the structure of the vent hole in fig. 3 according to the present invention.

Fig. 5 is an enlarged view of the structure of the vent pipe shown in fig. 3 according to the present invention.

List of reference numerals: a supercritical extraction kettle 100; a reaction kettle extraction mechanism 10; an extraction reaction kettle main body 11; a reactant stirring device 12; a feeding port 13; a discharge opening 14; an extraction powder recovery mechanism 20; a gas discharge assembly 21; a mixed gas recovery bin 210; an exhaust duct 211; an exhaust hood 212; an exhaust hole 213; side connection plates 214; an extract reflux assembly 22; a gas buffer network 220; a first return connection pipe 221; a second return connection pipe 222; a spray dusting assembly 23; an extract storage bin 230; an extraction water pump 231; a first connection pipe 232; a second connecting pipe 233; a spray fixing plate 234; a water mist spray head 235; a water conduit 236; a secondary filtration collection assembly 24; a filtration recovery silo 240; the ring gas passes through the pipe 241; a fine filter screen 242; a collection connection pipe 243; a collection recovery pipe 244; a control valve 245; a powder collection bin 246; a vent pipe 247; a vent hole 248; mixed gas holes 249.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 5, in an embodiment of the present invention, a supercritical extraction tank 100 includes: a reaction kettle extraction mechanism 10 and an extraction powder recovery mechanism 20. The extraction powder recovery mechanism 20 is used for intercepting and recovering fine powder materials carried in carbon dioxide discharged from the interior of the reaction kettle extraction mechanism 10. The reaction kettle extraction mechanism 10 includes: extraction reation kettle main part 11, reactant agitating unit 12, pan feeding mouth 13 and bin outlet 14. The reactant stirring device 12 is provided on the extraction reaction tank main body 11. The feeding port 13 is arranged at the side of the top end of the extraction reaction kettle main body 11. The discharge port 14 is provided at the bottom end of the extraction reaction vessel main body 11. The extraction powder recovery mechanism 20 includes: a gas discharge assembly 21, an extract return assembly 22, a spray dust collection assembly 23 and a secondary filtration collection assembly 24. The gas discharge assembly 21 is disposed on the extraction reaction vessel body 11 and is used for discharging carbon dioxide inside the extraction reaction vessel body 11. The extract reflux unit 22 is disposed on the gas exhaust unit 21 for intercepting and recovering the carbon dioxide containing powder material exhausted from the gas exhaust unit 21. The spray dust collecting assembly 23 is provided on the gas discharge assembly 21. The secondary filtering and collecting assembly 24 is disposed at the side of the gas discharge assembly 21 for further recovering the mixed powder in the carbon dioxide gas.

In the embodiment, when the existing supercritical carbon dioxide extraction kettle extracts fine powder materials, part of the materials can be mixed in carbon dioxide gas and carried out together while discharging carbon dioxide, so that the quality of products in the extraction kettle is reduced, the quality of extraction reaction of the extraction kettle does not meet the standard requirement, and the production and processing quality of the products is greatly influenced.

The extraction powder recovery mechanism 20 is provided outside the extraction reactor main body 11. The gas discharge unit 21 in the extraction powder recovery mechanism 20 can discharge excess carbon dioxide gas. Since the discharged carbon dioxide is mixed with the extraction substance powder, the extraction substance is prevented from flowing away. By arranging an extract reflux assembly 22 and a spray dust collection assembly 23 on the gas discharge assembly 21. The extract liquid in the extraction reaction kettle main body 11 is extracted and sprayed through the spraying dust collecting component 23. So that the gas exhausted from the inside of the gas exhaust assembly 21 is humidified during the upward movement. The powder material mixed in the gas can then be agglomerated into small particles by the action of the moisture and fall onto the extract return assembly 22. The extract material is secondarily returned to the extraction reaction vessel main body 11 through the extract returning block 22. And the loss of extraction substances is reduced. And a secondary filtering and collecting assembly 24 is arranged at the side of the spraying dust collecting assembly 23. The secondary filter collection assembly 24 further filters the humidified gas. So that the extraction powder material not removed in the carbon dioxide is filtered off again. Ensuring that the discharged carbon dioxide gas does not contain extraction powder substances. Improve the material quality accuracy of the extraction device.

As shown in fig. 1 to 5, in the embodiment of the present invention, the gas discharge assembly 21 includes: a mixed gas recovery bin 210, an exhaust duct 211, an exhaust hood 212, exhaust holes 213, and side connection plates 214. The mixed gas recovery bin 210 is disposed above the extraction reaction kettle main body 11. The exhaust pipe 211 is vertically inserted into the top end of the extraction reaction vessel main body 11. The top end of the exhaust duct 211 passes through the mixed gas recovery bin 210. An exhaust hood 212 is provided at the outlet of the exhaust duct 211. The exhaust holes 213 are uniformly opened in the exhaust hood 212. The side connection plates 214 are disposed outside the exhaust hood 212, and the side connection plates 214 are located above the exhaust holes 213.

The exhaust hood 212 has an inverted funnel shape to facilitate the flow of liquid.

The side webs 214 are angled to facilitate fluid flow away.

In this embodiment, the excessive gas in the extraction reaction vessel 11 enters the mixed gas recovery bin 210 through the exhaust pipe 211 arranged at the upper end of the extraction reaction vessel 11, and passes through the exhaust hood 212 arranged at the outlet of the top end of the exhaust pipe 211. The mixed gas flow discharged from the exhaust duct 211 can be diverted in the flowing direction. The mixed gas enters the inside of the mixed gas recovery bin 210 through the exhaust hole 213.

As shown in fig. 1 to 5, in the present embodiment, the extract reflux unit 22 includes: a gas buffer network 220, a first return connection pipe 221 and a second return connection pipe 222. The gas slow flow net 220 is disposed in the mixed gas recovery bin 210. The gas buffer screen 220 is located above the exhaust hood 212. The first backflow connecting pipe 221 is disposed at one side of the bottom end of the mixed gas recycling bin 210, and the mixed gas recycling bin 210 is communicated with the extraction reaction kettle main body 11 through the first backflow connecting pipe 221. The second backflow connecting pipe 222 is disposed at the other side of the bottom end of the mixed gas recycling bin 210, and the mixed gas recycling bin 210 is communicated with the extraction reaction kettle main body 11 through the second backflow connecting pipe 222.

The spray dusting assembly 23 comprises: an extract liquid storage bin 230, a water extraction pump 231, a first connecting pipeline 232, a second connecting pipeline 233, a spraying fixing plate 234, a water mist spray head 235 and a water conveying pipeline 236. An extract storage bin 230 is disposed above the mixed gas recovery bin 210. The extraction water pump 231 is provided at the side of the extraction reaction tank main body 11. The first connection pipe 232 is in communication with an input of the extraction water pump 231. The other end of the first connecting pipe 232 extends into the extraction reaction kettle main body 11. The second connecting pipe 233 is communicated with the output end of the extraction water pump 231, and the other end of the second connecting pipe 233 is communicated with the extract storage bin 230. The shower fixing plate 234 is disposed above the gas buffer flow net 220. A water mist spray head 235 is provided at the bottom side of the spray fixing plate 234. A water pipe 236 connects the water mist spray head 235 with the extract storage bin 230.

The second connecting pipe 233 is fixed to the extraction reaction tank main body 11 by a fixing clip.

In the present embodiment, when the mixed gas enters the inside of the mixed gas recovery bin 210, the extraction water pump 231 is simultaneously activated. The extraction liquid in the extraction reaction tank main body 11 is extracted by an extraction water pump 231 through a first connection pipe 232. The extraction liquid is further transported to the extraction liquid storage bin 230 through a second connecting pipe 233. The extraction liquid is fed into the water mist spray head 235 through the water pipe 236. The inside of the mixed gas recovery bin 210 is sprayed by the water mist spray head 235, so that the inside of the mixed gas recovery bin 210 is filled with water mist. And further humidifies the extracted substances in the mixed gas that has entered the mixed gas recovery silo 210. Making it agglomerate into small granules. Falls to the bottom end of the mixed gas recovery bin 210. And is returned to the inside of the extraction reactor main body 11 again through the first return connection pipe 221 and the second return connection pipe 222. The inclined exhaust hood 212 and the side connection plates 214 facilitate the sprayed extract and agglomerated powder material to flow to the bottom end of the mixed gas recycling bin 210. The expansion of the recycling work is accelerated.

As shown in fig. 1 to 5, in the present embodiment, the secondary filtration collection assembly 24 includes: the filter recovery bin 240, the annular gas passing pipe 241, the fine filter 242, the collection connecting pipe 243, the collection recovery pipe 244, the control valve 245, the powder collection bin 246, the vent pipe 247, the vent hole 248 and the mixed gas through hole 249. The filtering recovery bin 240 is disposed at a side of the mixed gas recovery bin 210. The annular gas is disposed within the filtration recovery silo 240 via a pipe 241. A fine filter screen 242 is provided in the pipe of the annular gas passing pipe 241 for re-filtering the powder material. The collecting connection pipe 243 communicates with the ring gas through the bottom end of the pipe 241. The collection recovery pipe 244 communicates with the collection connection pipe 243. The bottom end of the collection and recovery pipe 244 passes through the filtration and recovery tank 240. A control valve 245 is provided on the collection recovery pipe 244. The powder collecting bin 246 is disposed below the filtering recovery bin 240. The bottom end of collection recovery tube 244 communicates with powder collection bin 246. The vent tube 247 communicates with the annular gas through tube 241. The vent hole 248 is opened at the top end of the mixed gas recovery bin 210. The vent tube 247 communicates with the vent hole 248. The mixed gas through hole 249 is opened in the shower fixing plate 234.

The vent hole 248 is obliquely arranged at the side corner of the top end of the mixed gas recovery bin 210.

The annular gas passes through the pipe 241 and is in a multi-section rotary bending shape, and the annular gas passes through the tail end of the pipe 241 and passes out of the filtering and recycling bin 240. And the top end of the filtration recovery bin 240 is provided with a baffle preventing dust from falling into the annular gas passing pipe 241.

In the embodiment of the invention, in order to further improve the filtration purity of the mixed gas, the extraction substance powder in the mixed gas is removed to the maximum extent. The filtering recovery bin 240 is arranged at the side of the mixed gas recovery bin 210. The mixed gas removed by the first-step water mist enters the upper end of the mixed gas recovery bin 210 through the mixed gas through hole 249. Through the vent hole 248 and into the interior of the vent tube 247. Through the vent tube 247 and into the annular gas passage tube 241. And is in a shape of a turning curve due to the annular gas passing pipe 241. And thus the gas entering the ring gas passing pipe 241 has a longer residence time. And dust fall of powder substances is facilitated. And is filtered again by the fine filter 242 when passing through the fine filter 242. The filtered powder enters the annular gas passing tube 241 at its bottom end, passes through the collection connection tube 243 and enters the interior of the collection recovery tube 244. And the fine filter 242 filters the carbon dioxide again to remove the powdered carbon dioxide to the maximum extent. Ensuring that the gas exiting the annular gas discharge opening through the pipe 241 is free of extracted matter. Collecting after a period of time. He opens the control valve 245. The collected powder can be gathered into the powder collecting bin 246, and the powder is recycled by extracting the powder in the powder collecting bin 246, so that the loss of the powder is reduced.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A supercritical extraction kettle, comprising: the reaction kettle extraction mechanism and the extraction powder recovery mechanism; the extraction powder recovery mechanism is used for intercepting and recovering fine powder materials carried in carbon dioxide discharged from the interior of the reaction kettle extraction mechanism; the reation kettle extracts the mechanism and includes: the extraction reaction kettle comprises an extraction reaction kettle main body, a reactant stirring device, a feeding port and a discharging port; the reactant stirring device is arranged on the extraction reaction kettle main body; the feeding port is arranged on the side edge of the top end of the extraction reaction kettle main body; the discharge port is arranged at the bottom end of the extraction reaction kettle main body; the extraction powder recovery mechanism comprises: the device comprises a gas discharge assembly, an extract backflow assembly, a spray dust collecting assembly and a secondary filtering and collecting assembly; the gas discharge assembly is arranged on the extraction reaction kettle main body and is used for discharging carbon dioxide in the extraction reaction kettle main body; the extract reflux assembly is arranged on the gas discharge assembly and is used for intercepting and recovering carbon dioxide containing powder substances discharged by the gas discharge assembly; the spraying dust collecting assembly is arranged on the gas discharging assembly; the secondary filtering and collecting assembly is arranged on the side edge of the gas discharging assembly and is used for further recovering mixed powder in the carbon dioxide gas.

2. The supercritical extraction kettle according to claim 1,

the gas discharge assembly includes: the mixed gas recovery bin, the exhaust pipeline, the exhaust hood, the exhaust hole and the side connecting plate are arranged on the side wall of the exhaust hood; the mixed gas recovery bin is arranged above the extraction reaction kettle main body; the exhaust pipeline is vertically inserted at the top end of the extraction reaction kettle main body; the top end of the exhaust pipeline penetrates through the mixed gas recovery bin; the exhaust hood is arranged at an outlet of the exhaust pipeline; the exhaust holes are uniformly formed in the exhaust cover; the side connecting plate sets up the outside of exhaust hood, just the side connecting plate all is located the top of exhaust hole.

3. The supercritical extraction kettle according to claim 2,

the exhaust hood is in an inverted funnel shape which is convenient to flow away from liquid.

4. The supercritical extraction vessel according to claim 3 is characterized in that,

the side connecting plate is in an inclined shape which is convenient for liquid to flow away.

5. The supercritical extraction kettle according to claim 4,

the extract reflux assembly comprises: the gas slow flow net, the first reflux connecting pipe and the second reflux connecting pipe are arranged in the gas slow flow net; the gas slow flow net is arranged in the mixed gas recovery bin; the gas slow flow net is positioned above the exhaust hood; the first backflow connecting pipe is arranged on one side of the bottom end of the mixed gas recovery bin and is used for communicating the mixed gas recovery bin with the extraction reaction kettle main body; the second backflow connecting pipe is arranged on the other side of the bottom end of the mixed gas recovery bin and is used for communicating the mixed gas recovery bin with the extraction reaction kettle main body.

6. The supercritical extraction kettle according to claim 5,

the spray dusting assembly comprising: the extraction liquid storage bin, the extraction water pump, the first connecting pipeline, the second connecting pipeline, the spray fixing plate, the water mist spray head and the water conveying pipeline; the extraction liquid storage bin is arranged above the mixed gas recovery bin; the extraction water pump is arranged on the side of the extraction reaction kettle main body; the first connecting pipeline is communicated with the input end of the extraction water pump; the other end of the first connecting pipeline extends into the extraction reaction kettle main body; the second connecting pipeline is communicated with the output end of the extraction water pump, and the other end of the second connecting pipeline is communicated with the extraction liquid storage bin; the spraying fixing plate is arranged above the gas slow flow net; the water mist spray head is arranged at the bottom side of the spraying fixing plate; the water pipeline is used for communicating the water mist spray head with the extract liquor storage bin.

7. The supercritical extraction kettle according to claim 6,

the second connecting pipeline is fixed on the extraction reaction kettle main body through a fixing clamp.

8. The supercritical extraction kettle according to claim 7,

the secondary filter collection assembly comprises: the device comprises a filtering recovery bin, an annular gas passing pipe, a precision filter screen, a collecting connecting pipe, a collecting recovery pipe, a control valve, a powder collecting bin, a vent pipe, a vent hole and a mixed gas through hole; the filtering recovery bin is arranged on the side edge of the mixed gas recovery bin; the annular gas is arranged in the filtering and recovering bin through a pipe; the precise filter screen is arranged in the pipe of the annular gas passing pipe and is used for filtering the powder substances again; the collecting connecting pipe is communicated with the bottom end of the annular gas passing pipe; the collecting and recycling pipe is communicated with the collecting and connecting pipe; the bottom end of the collecting and recycling pipe penetrates through the filtering and recycling bin; the control valve is arranged on the collecting and recovering pipe; the powder collecting bin is arranged below the filtering and recovering bin; the bottom end of the collecting and recycling pipe is communicated with the powder collecting bin; the vent pipe is communicated with the annular gas through pipe; the vent hole is formed in the top end of the mixed gas recovery bin; the vent pipe is communicated with the vent hole; the mixed gas through hole is formed in the spraying fixing plate.

9. The supercritical extraction kettle according to claim 8,

the vent hole is obliquely arranged at a side angle of the top end of the mixed gas recovery bin.

10. The supercritical extraction kettle according to claim 9,

the annular gas passes through the pipe and is in a multi-section rotary bending shape, and the annular gas passes through the tail end of the pipe and penetrates out of the filtering and recovering bin; and the top end of the filtering and recovering bin is provided with a baffle plate for preventing dust from falling into the annular gas passing pipe.