Extraction and suction filtration integrated device

Abstract

The utility model provides an extraction and suction filtration integrated device, and belongs to the technical field of solid-liquid separation. The inner cylinder is arranged in the outer cylinder; a plurality of liquid leakage holes are formed in the bottom of the inner cylinder; the filter membrane is arranged at the inner bottom of the inner cylinder; the periphery of the filter membrane is propped against the bottom edge of the inner cylinder; the annular sealing plate is arranged on the outer wall of the inner cylinder; the periphery of the annular sealing plate abuts against the inner wall of the outer cylinder through a rubber ring. An air exhaust hole and a water pumping hole are formed in the annular sealing plate; in an extraction state, the bottom of the inner cylinder is propped against the bottom of the outer cylinder; and in a suction filtration state, the inner cylinder is fixed and suspended in the outer cylinder through a fixing piece. The extraction and suction filtration integrated device disclosed by the utility model integrates extraction and suction filtration, can complete multiple times of extraction and suction filtration, and effectively improves the extraction efficiency. According to the device disclosed by the utility model, multiple extraction and solid-liquid separation of a solid sample can be completed in one device, so that the loss of secondary extraction transfer of separated precipitates is avoided, the operation process is simplified, and the consumption of a filter material is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to solid -liquid separation technical field, more specifically, it relates to a leaching and filtration integrated device. BACKGROUND

[0002] Gallium (Ga) is a rare and dispersed metal, with a content of only 0.0015% in the earth's crust, known as "the food of electronic industry", mainly used in semiconductor, catalysis, medical treatment, thermal interface material and optical fields. Gallium does not form ore independently in nature, usually enters other minerals in the form of isomorphism, mainly associated with bauxite, and exists in minerals such as diaspore, apatite, nepheline, alunite and aluminosilicate.

[0003] Gallium is mainly extracted from bauxite and zinc smelting slag. Although the annual output is increasing year by year, it is still lower than the increase speed of gallium industrial demand, so many scientists try to recover gallium from gallium-containing waste to alleviate the contradiction between supply and demand. Although the gallium content in coal and fly ash generated by coal combustion is low, the reserves are large and the potential economic value is huge, so it is considered as one of the potential sources of gallium.

[0004] Because of the similar properties of aluminum and gallium, gallium often co-precipitates with aluminum in the form of hydroxide during the process of extracting aluminum from fly ash. The methods for extracting gallium from aluminum-gallium co-precipitate mainly include carbon separation method (CN101130835A, CN101368231A), resin adsorption method (CN101838738A, CN103805794B or CN112981092B) and extraction method (CN109897961A) and the like. Among them, the carbon separation method is based on the difference in solubility of aluminum and gallium under the same pH condition in weak alkaline solution, CO2 is introduced into the sodium hydroxide alkaline solution to adjust the pH to the range of 9.7-10.6, so that gallium is dissolved, and it is dissolved in the form of Ga(OH)4 - . This pH range can reduce the dissolution of aluminum, increase the gallium-aluminum ratio from less than 1:15000 in fly ash to more than 1:30 (CN104745841A) or 1:340 (CN102191384A), and then treat the solution after the first carbon separation and solid-liquid separation to obtain gallium-rich liquid. However, the gallium-aluminum ratio obtained by the first carbon separation with CO2 is still not high enough. Studies have shown that multiple carbon separation of aluminum hydroxide can effectively improve the gallium-aluminum ratio in the leaching solution and realize the enrichment of gallium.

[0005] However, the existing leaching and solid-liquid separation devices are separated, and for single leaching and separation, it is simple, but for aluminum hydroxide which needs to be leached multiple times, the aluminum hydroxide after solid-liquid separation needs to be leached with carbon separation buffer solution again, so that the operation is complicated. Therefore, it is necessary to design a leaching and filtration integrated device. UTILITY MODEL CONTENT

[0006] The purpose of this utility model is to provide an integrated leaching and filtration device that combines leaching and filtration, enabling multiple leaching and filtration operations, effectively improving leaching efficiency and simplifying the leaching and filtration process.

[0007] To achieve the above objectives, this utility model provides an integrated leaching and filtration device, comprising:

[0008] outer cylinder;

[0009] An inner cylinder is placed inside the outer cylinder; the bottom of the inner cylinder is provided with multiple leakage holes;

[0010] A filter membrane is placed at the bottom of the inner cylinder; the outer periphery of the filter membrane abuts against the bottom edge of the inner cylinder; and,

[0011] An annular sealing plate is disposed on the outer wall of the inner cylinder; the outer periphery of the annular sealing plate abuts against the inner wall of the outer cylinder through a rubber ring; the annular sealing plate is provided with an air extraction hole and a water extraction hole;

[0012] In the extraction state, the bottom of the inner cylinder abuts against the bottom of the outer cylinder;

[0013] In the filtration state, the inner cylinder is fixed and suspended inside the outer cylinder by a fastener.

[0014] Furthermore, the fixing component includes a fixing cover and a first connecting rod. The annular sealing plate is provided with a connecting post. The fixing cover is provided with a first fixing hole and a second fixing hole. One end of the connecting post is inserted into the first fixing hole to connect the fixing cover to the annular sealing plate. The outer cylinder is provided with a third fixing hole. The first connecting rod passes through the second fixing hole and the third fixing hole to connect the fixing cover and the outer cylinder.

[0015] Furthermore, the inner cylinder includes an annular cylindrical wall and a membrane support bottom cylinder that is snapped onto the lower side of the annular cylindrical wall. The outer wall of the annular cylindrical wall abuts against the inner wall of the membrane support bottom cylinder. A plurality of leakage holes are provided on the membrane support bottom cylinder, and the filter membrane is placed on the membrane support bottom cylinder.

[0016] Furthermore, the fixing cover is annular.

[0017] Furthermore, the fixing cover includes at least two symmetrical fan-shaped rings.

[0018] Furthermore, the first connecting rod is a screw or bolt.

[0019] Furthermore, the connecting post is a stud.

[0020] Furthermore, the first fixing hole is evenly provided on the fixing cover in multiple ways.

[0021] Furthermore, multiple second fixing holes are evenly provided on the fixing cover.

[0022] Furthermore, it also includes a pressure cap and a rubber gasket, the rubber gasket being disposed at the inner bottom of the outer cylinder, and the pressure cap covering the inner cylinder so that the bottom of the inner cylinder abuts against the bottom of the outer cylinder through the rubber gasket.

[0023] Furthermore, it also includes a second connecting rod and a sealing ring. The sealing ring is fitted onto the upper edge of the inner cylinder. The pressure cap is provided with a fourth fixing hole. The second connecting rod passes through the third fixing hole and the fourth fixing hole to connect the pressure cap to the outer cylinder, and the pressure cap abuts against the sealing ring.

[0024] Furthermore, the inner cylinder is also equipped with an electric stirring device, and the pressure cap is provided with perforations.

[0025] Furthermore, the fourth fixing hole is evenly provided on the pressure cap in multiple portions.

[0026] Compared with the prior art, the present invention has the following technical effects:

[0027] This utility model discloses an integrated extraction and filtration device comprising an inner cylinder and an outer cylinder. In extraction mode, the solid substance is extracted through the inner cylinder. After extraction, the inner cylinder is lifted, separating its bottom from the bottom of the outer cylinder. The inner cylinder is then fixed and suspended within the outer cylinder by a fixing component, thus transitioning to filtration mode. A negative pressure environment is created by drawing air out of the space between the annular sealing plate and the outer cylinder through the air extraction holes on the annular sealing plate. This allows the extractant in the inner cylinder to continuously leak through the leakage holes at its bottom to the bottom of the outer cylinder. The extractant is then extracted through the water extraction holes on the annular sealing plate, completing one extraction and filtration process. This integrated extraction and filtration device combines extraction and filtration into one unit, effectively achieving solid-liquid separation. It can perform multiple extractions and filtrations, significantly improving extraction efficiency. This integrated extraction and filtration device can complete multiple extractions and solid-liquid separations of solid samples within a single device, avoiding losses from secondary extraction and transfer of sediment after separation, simplifying the operation process, and reducing filter material consumption. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1A schematic diagram of the structure of an integrated extraction and filtration device provided in an embodiment of this utility model;

[0030] Figure 2 for Figure 1 Schematic diagram of the inner cylinder structure;

[0031] Figure 3 for Figure 2 A top-view structural diagram;

[0032] Figure 4 This is a schematic diagram of the structure of the membrane support bottom cylinder provided in an embodiment of the present utility model;

[0033] Figure 5 for Figure 4 A top-view structural diagram;

[0034] Figure 6 This is a schematic diagram of the structure of a fixing cover provided in an embodiment of the present utility model;

[0035] Figure 7 This is a schematic diagram of a pressure cap provided for an embodiment of the present utility model.

[0036] The following are the labeling elements in the figure:

[0037] 1. Outer cylinder, 2. Inner cylinder, 3. Third fixing hole, 4. Pressure cap, 5. Annular sealing plate, 6. Connecting column, 7. Water extraction hole, 8. Air extraction hole, 9. First fixing hole, 10. Filter membrane, 11. Fixing cap, 12. Second fixing hole, 13. Fourth fixing hole, 14. Perforation, 201. Annular cylinder wall, 202. Membrane support bottom cylinder. Detailed Implementation

[0038] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0039] In this invention, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0040] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0041] It should be understood that the terms "length", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] The terminology used in the embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The singular forms “a,” “the,” and “the” as used in the embodiments of this utility model and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0043] The terms "first" and "second" are used for descriptive purposes only, to distinguish objects, such as substances, from one another, and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. For example, without departing from the scope of the embodiments of this utility model, a first XX can also be referred to as a second XX, and similarly, a second XX can also be referred to as a first XX. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0044] Please see Figures 1-7 The present invention will now describe an integrated extraction and filtration device provided by an embodiment of the present invention.

[0045] In one embodiment of this utility model, an integrated extraction and filtration device includes an outer cylinder 1, an inner cylinder 2, a filter membrane 10, and an annular sealing plate 5. The inner cylinder 2 is placed inside the outer cylinder 1; the bottom of the inner cylinder 2 is provided with multiple leakage holes; the filter membrane 10 is placed at the bottom of the inner cylinder 2; the outer periphery of the filter membrane 10 abuts against the bottom edge of the inner cylinder 2; the annular sealing plate 5 is disposed on the outer wall of the inner cylinder 2, and the outer periphery of the annular sealing plate 5 abuts against the inner wall of the outer cylinder 1 through a rubber ring, and the annular sealing plate 5 is used to seal the gap between the inner and outer cylinders; the annular sealing plate 5 is provided with an air extraction hole 8 and a water extraction hole 7. In the extraction state, the bottom of the inner cylinder 2 abuts against the bottom of the outer cylinder 1; in the filtration state, the inner cylinder 2 is fixed and suspended inside the outer cylinder 1 by a fixing member.

[0046] In the extraction and filtration integrated device of this utility model embodiment, when used in the extraction state, the solid material to be extracted is added to the inner cylinder 2, and the extraction solution is added to the inner cylinder 2 at the same time. The extraction of the solid material is completed through the inner cylinder 2. During the extraction process, the bottom of the inner cylinder 2 is in close contact with the bottom of the outer cylinder 1, so that the extraction solution in the inner cylinder 2 cannot leak out through the leakage hole at the bottom of the inner cylinder 2. After extraction, the inner cylinder 2 is lifted up, separating the bottom of the inner cylinder 2 from the bottom of the outer cylinder 1. The inner cylinder 2 is then fixed in place by a fastener and suspended inside the outer cylinder 1, thus switching to filtration mode. In filtration mode, the water extraction hole 7 is blocked, and a vacuum pump is connected through the air extraction hole 8 on the annular sealing plate 5. This creates a negative pressure environment by drawing air out of the space between the annular sealing plate 5 and the outer cylinder 1, causing the extract in the inner cylinder 2 to continuously leak through the leakage hole at its bottom to the bottom of the outer cylinder 1. Then, the water extraction hole 7 is opened, and the extract is extracted through the water extraction hole 7 on the annular sealing plate 5, thus completing one extraction and filtration process.

[0047] This invention discloses an integrated extraction and filtration device that combines extraction and filtration into one unit. It is an effective integrated device for solid-liquid separation, capable of performing multiple extractions and filtrations, thus significantly improving extraction efficiency. This integrated extraction and filtration device can complete multiple extractions and solid-liquid separations of solid samples within a single device, avoiding losses due to secondary extraction and transfer of precipitate after separation, simplifying the operation process, and reducing filter material consumption.

[0048] Furthermore, in this embodiment, the inner cylinder 2 includes an annular cylindrical wall 201 and a membrane support bottom cylinder 202 snapped onto the lower side of the annular cylindrical wall 201. The outer wall of the annular cylindrical wall 201 abuts against the inner wall of the membrane support bottom cylinder 202. The bottom of the membrane support bottom cylinder 202 is provided with multiple leakage holes, and the filter membrane 10 is placed on the membrane support bottom cylinder 202. By designing the inner cylinder 2 as two detachably connected parts, the annular cylindrical wall 201 and the membrane support bottom cylinder 202, after the extraction and filtration are completed, the membrane support bottom cylinder 202 can be detached from the lower side of the annular cylindrical wall 201, making it convenient to remove the fixed material inside the inner cylinder 2 and replace the filter membrane 10.

[0049] Furthermore, the fixing components in this embodiment include a fixing cover 11 and a first connecting rod (not shown in the figure). A connecting post 6 is provided on the annular sealing plate 5, and the fixing cover 11 has a first fixing hole 9 and a second fixing hole 12. One end of the connecting post 6 is inserted into the first fixing hole 9 to connect the fixing cover 11 to the annular sealing plate 5. A third fixing hole 3 is provided at the edge of the outer cylinder 1's opening. The first connecting rod passes through the second fixing hole 12 and the third fixing hole 3 to connect the fixing cover 11 and the outer cylinder 1. By setting the fixing cover 11 and the first connecting rod, after the extraction is completed and the inner cylinder 2 is lifted, the lifted inner cylinder 2 can be fixed to the outer cylinder 1 via the annular sealing plate 5 on its outer wall through the fixing cover 11 and the first connecting rod, so that the lifted inner cylinder 2 can be stably fixed at this position, facilitating subsequent filtration operations. Specifically, the first connecting rod can be a screw, and the connecting post 6 can also be a stud provided on the upper side of the annular sealing plate 5. In this way, the lifted inner cylinder 2 and the outer cylinder 1 can be connected and fixed by simple bolts (or screws) and nuts. The fixed cover 11 can be annular or include at least two symmetrically arranged fan-shaped annular sections. Figure 4 The displayed fixing cover 11 consists of two symmetrically arranged fan-shaped rings. Multiple first fixing holes 9 can be evenly provided on the fixing cover 11, and correspondingly, multiple connecting posts 6 are also provided. Multiple second fixing holes 12 can also be evenly provided on the fixing cover 11, so as to make the connection between the fixing cover 11, the outer cylinder 1, and the inner cylinder 2 more stable.

[0050] Furthermore, the device in this embodiment also includes a pressure cap 4 and a rubber gasket (not shown in the figure). The rubber gasket is located at the inner bottom of the outer cylinder 1, and the thickness of the rubber gasket can be 0.5-3mm. The pressure cap 4 covers the inner cylinder 2 so that the bottom of the inner cylinder 2 and the bottom of the outer cylinder 1 are tightly abutted by the rubber gasket. During the extraction operation, if the bottom of the inner cylinder 2 and the bottom of the outer cylinder 1 cannot be completely tightly fitted, causing the extraction liquid in the inner cylinder 2 to leak out from the leakage hole at its bottom, a pressure cap 4 is added to the upper side of the inner cylinder 2. The pressure cap 4 applies downward pressure to the inner cylinder 2, so that the bottom of the inner cylinder 2 and the bottom of the outer cylinder 1 can be tightly fitted to prevent the extraction liquid in the inner cylinder 2 from leaking out.

[0051] Furthermore, the device in this embodiment also includes a second connecting rod and a sealing ring (not shown in the figure). The sealing ring is fitted around the upper edge of the inner cylinder 2, making the upper end of the inner cylinder 2 10.2-1mm higher than the outer cylinder. The pressure cap 4 is provided with a fourth fixing hole 13. The second connecting rod passes through the third fixing hole 3 and the fourth fixing hole 13 to connect the pressure cap 4 to the outer cylinder 1, and the pressure cap 4 abuts against the sealing ring. Specifically, the second connecting rod can be a screw, so that the tight connection between the screw and the nut allows the pressure cap 4 to apply a stable downward force to the inner cylinder 2, making the bottom of the inner cylinder 2 fit tightly against the bottom of the outer cylinder 1, thus preventing the extraction liquid in the inner cylinder 2 from leaking out. Multiple fourth fixing holes 13 can be evenly provided on the pressure cap 4 to make the connection between the pressure cap 4 and the outer cylinder 1 more secure.

[0052] Furthermore, the inner cylinder 2 of this embodiment is also equipped with an electric stirring device (not shown in the figure), and the pressure cap 4 is provided with a perforation 14. The electric stirring device stirs the extract in the inner cylinder 2 to improve the extraction efficiency. The electric stirring device can be supported by an external support device, and the connecting wire of the electric stirring device can be led out from the perforation 14.

[0053] The enrichment of gallium in aluminum hydroxide products using the integrated leaching and filtration device of this embodiment can be carried out by the following steps:

[0054] (1) Place the inner cylinder 2 into the outer cylinder 1, and use the pressure cap 4 and the second connecting rod to make the bottom surfaces of the inner and outer cylinders fit tightly and prevent water leakage; add the aluminum hydroxide product to be extracted into the inner cylinder 2, and then add carbonate extraction solution with a concentration of not less than 1 mol / L and pH = 10.5-11.5 according to the solid-liquid mass ratio of 5:1-200:1. Turn on the electric stirring device placed in the inner cylinder 2 and stir for 5-120 minutes until the extraction is completed.

[0055] (2) Unscrew the second connecting rod and nut on the pressure cap 4, remove the pressure cap 4, lift the inner cylinder 2 to the opening of the outer cylinder 1 where the annular sealing plate 5 reaches, put on the fixing cap 11 and fix the fixing cap 11 to the outer cylinder 1 with the first connecting rod, and fix the fixing cap 11 to the annular sealing plate 5 through the connecting column 6.

[0056] (3) Connect the air extraction hole 8 of the annular sealing plate 5 to the vacuum pump with a rubber tube. Seal the water extraction hole 7 with a threaded cap. Turn on the vacuum pump to perform negative pressure filtration. Filter until there is no solution in the inner cylinder 2. Then turn off the vacuum pump, remove the rubber tube connected to the air extraction hole 8, open the water extraction hole 7 and insert the water extraction pipe to the bottom of the outer cylinder 1 to extract the solution in the outer cylinder 1.

[0057] (4) Unscrew the first connecting rod and nut on the fixed cover 11, remove the fixed cover 11, and lower the inner cylinder 2 to the bottom position where it contacts the outer cylinder 1. Repeat the above process (1)-(3) immersion filtration process 2-4 times, and combine the obtained filtrate.

[0058] The following are two specific embodiments to illustrate how an integrated leaching and filtration device using this embodiment can effectively enrich gallium in aluminum hydroxide products:

[0059] Example 1

[0060] A 0.45 μm aqueous filter membrane 10 is fixed at the bottom of the inner cylinder 2. The inner cylinder 2 is placed inside the outer cylinder 1, and the pressure cap 4 is placed on top and tightened. 6.3 g of solid aluminum hydroxide (aluminum-gallium ratio of 190) is weighed and placed in the inner cylinder 2 of the integrated extraction and filtration device of this embodiment. 200 mL of 1 mol / L carbonate solution with pH = 10.6 is added, and the mixture is stirred for 60 min. The pressure cap 4 is removed, the inner cylinder 2 is raised to the opening of the outer cylinder 1, and the inner cylinder 2 is tightened with the fixing cap 11. Then, a vacuum pump is connected, and filtration is performed under sealed conditions. After completion, the filtrate is extracted. The extraction and filtration are repeated once, and a filtrate mixture with an aluminum-gallium ratio of 20.1 is finally obtained. The gallium-aluminum ratio is increased by about 9.5 times, and the gallium extraction rate is 66%, effectively achieving gallium enrichment.

[0061] Example 2

[0062] A 0.45 μm aqueous filter membrane 10 is fixed at the bottom of the inner cylinder 2. The inner cylinder 2 is placed inside the outer cylinder 1, and the pressure cap 4 is placed on top and tightened. 20 g of solid aluminum hydroxide (aluminum-gallium ratio of 620) is weighed and placed in the inner cylinder 2 of the integrated extraction and filtration apparatus of this embodiment. 200 mL of 1 mol / L carbonate solution with pH = 10.6 is added, and the mixture is stirred for 60 min. The pressure cap 4 is removed, and the inner cylinder 2 is raised to the opening of the outer cylinder 1 and tightened with the fixing cap 11. Then, a vacuum pump is connected, and filtration is performed under sealed conditions. After completion, the filtrate is extracted. The extraction and filtration are repeated once, and a filtrate with an aluminum-gallium ratio of 21.7 is finally obtained. The gallium-aluminum ratio is increased by about 28.6 times, and the gallium extraction rate is 82%, effectively achieving gallium enrichment.

[0063] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An integrated extraction and filtration device, characterized in that, include: outer cylinder; An inner cylinder is placed inside the outer cylinder; the bottom of the inner cylinder is provided with multiple leakage holes; A filter membrane is placed at the bottom of the inner cylinder; the outer periphery of the filter membrane abuts against the bottom edge of the inner cylinder; and, An annular sealing plate is disposed on the outer wall of the inner cylinder; the outer periphery of the annular sealing plate abuts against the inner wall of the outer cylinder through a rubber ring; the annular sealing plate is provided with an air extraction hole and a water extraction hole; In the extraction state, the bottom of the inner cylinder abuts against the bottom of the outer cylinder; In the filtration state, the inner cylinder is fixed and suspended inside the outer cylinder by a fastener.

2. The integrated extraction and filtration device as described in claim 1, characterized in that, The fastener includes a fixing cover and a first connecting rod. The annular sealing plate is provided with a connecting post. The fixing cover is provided with a first fixing hole and a second fixing hole. One end of the connecting post is inserted into the first fixing hole to connect the fixing cover to the annular sealing plate. The outer cylinder is provided with a third fixing hole. The first connecting rod passes through the second fixing hole and the third fixing hole to connect the fixing cover and the outer cylinder.

3. The integrated extraction and filtration device as described in claim 1, characterized in that, The inner cylinder includes an annular cylindrical wall and a membrane support bottom cylinder that is snapped onto the lower side of the annular cylindrical wall. The outer wall of the annular cylindrical wall abuts against the inner wall of the membrane support bottom cylinder. A plurality of leakage holes are provided on the membrane support bottom cylinder, and the filter membrane is placed on the membrane support bottom cylinder.

4. The integrated extraction and filtration device as described in claim 2, characterized in that, The fixing cover is annular; or the fixing cover comprises at least two symmetrical fan-shaped annular sections.

5. The integrated extraction and filtration device as described in claim 2, characterized in that, The first connecting rod is a screw or bolt; and / or the connecting post is a stud.

6. The integrated extraction and filtration device as described in claim 2, characterized in that, The first fixing hole is provided in a plurality of evenly distributed forms on the fixing cover; and / or the second fixing hole is provided in a plurality of evenly distributed forms on the fixing cover.

7. The integrated extraction and filtration device as described in claim 2, characterized in that, It also includes a pressure cap and a rubber gasket, the rubber gasket being disposed at the inner bottom of the outer cylinder, and the pressure cap covering the inner cylinder so that the bottom of the inner cylinder abuts against the bottom of the outer cylinder through the rubber gasket.

8. The integrated extraction and filtration device as described in claim 7, characterized in that, It also includes a second connecting rod and a sealing ring. The sealing ring is fitted around the upper edge of the inner cylinder. The pressure cap is provided with a fourth fixing hole. The second connecting rod passes through the third fixing hole and the fourth fixing hole to connect the pressure cap to the outer cylinder, and the pressure cap abuts against the sealing ring.

9. The integrated extraction and filtration device as described in claim 7, characterized in that, The inner cylinder is also equipped with an electric stirring device, and the pressure cap is provided with perforations.

10. The integrated extraction and filtration device as described in claim 8, characterized in that, The fourth fixing hole is evenly provided on the pressure cover.

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