Sulfonate substance extraction system

Abstract

The utility model relates to the technical field of sulfonated substance extraction, and discloses a sulfonated substance extraction system which comprises an extraction agent storage tank, a sulfonated substance storage tank, a first extraction device, a second extraction device and a washing device, and the first extraction device is communicated with the liquid outlet end of the extraction agent storage tank and is provided with a first light liquid outlet and a first heavy liquid outlet; the second extraction device is communicated with the first light liquid outlet and the liquid outlet end of the sulfonated substance storage tank and is provided with a second light liquid outlet and a second heavy liquid outlet, and the second heavy liquid outlet is communicated with the first extraction device; the washing device is communicated with the second light liquid outlet and is provided with a third light liquid outlet and a third heavy liquid outlet, and the second heavy liquid outlet is communicated with the second extraction device. The sulfonated material extraction system can realize the extraction of the sulfonated material, and can improve the purity and yield of the sulfonated material.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sulfonated substance extraction, and particularly relates to a sulfonated substance extraction system. BACKGROUND

[0002] 2-amino-3, 6, 8-naphthalene trisulfonic acid (K acid) is a light brown powder, slightly soluble in hot water, soluble in soda or caustic soda solution, and yellow-green with iron trioxide, mainly used for preparing azo reactive dyes, acid dyes and organic synthetic pigments. The traditional synthesis process of K acid mainly uses 2-naphthol as raw material, and carries out monosulfonation by using sulfuric acid and oleum to obtain G acid, R acid and Schaeffer's acid, separates the amino G salt by potassium chloride salting-out, obtains the amino G acid after the amino G salt is subjected to ammoniation, acid separation and drying, and carries out disulfonation on the amino G acid by using 65% oleum, and finally obtains the finished product K acid through dilution and centrifugation.

[0003] The production process of 2-amino-3, 6, 8-naphthalene trisulfonic acid disclosed in publication No. CN111909061B comprises the following steps: carrying out first sulfonation reaction on 2-naphthol to obtain sulfonated material; diluting the sulfonated material, then adding an extractant to carry out extraction to obtain dilute sulfuric acid and first organic phase; in the process of diluting the sulfonated material, the mass ratio of the sulfonated material to water is 1: (0.3-0.5), and the temperature is 70-85 DEG C; in the extraction process, the extractant is C8-C12 alkyl tertiary amine extractant, the mass ratio of the extractant to the diluted sulfonated material is 1: (1.0-1.2); the extraction temperature is controlled at 70-90 DEG C; the first organic phase is washed and separated to obtain washing water and second organic phase, then ammonia water is added to the second organic phase to pH 8-10, and the mixture is separated to obtain stripping liquid; in the process of obtaining the stripping liquid, the concentration of the ammonia water used is 10%-20%; ammoniation is carried out by adding ammonium bisulfite solution into the stripping liquid and simultaneously introducing liquid ammonia, after the ammoniation is completed, ammonia is removed; the material after the ammonia removal is acidified, then solid-liquid separation is carried out to obtain mixed dry powder; the mixed dry powder is subjected to second sulfonation reaction to obtain 2-amino-3, 6, 8-naphthalene trisulfonic acid.

[0004] In the process of extracting the sulfonated material, the water phase containing dilute sulfuric acid and the first organic phase containing the sulfonated material are obtained, after the water phase and the first organic phase are separated, the water phase still contains the sulfonated material that is not completely separated, causing the loss of the sulfonated material. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the above technical defects, and provides a sulfonated substance extraction system to solve the technical problem of the loss of sulfonated material in the extraction process in the prior art.

[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of sulfonate extraction system, comprising:

[0008] extractant storage tank;

[0009] sulfonate storage tank;

[0010] First extraction device, with the liquid outlet end of the extractant storage tank is communicated, and with first light liquid outlet and first heavy liquid outlet;

[0011] Second extraction device, with the first light liquid outlet and the liquid outlet end of the sulfonate storage tank is communicated, and with second light liquid outlet and second heavy liquid outlet, the second heavy liquid outlet with the first extraction device is communicated;And

[0012] Water washing device, with the second light liquid outlet is communicated, and with third light liquid outlet and third heavy liquid outlet, the second heavy liquid outlet with the second extraction device is communicated.

[0013] In one embodiment thereof, the water washing device includes a water washing assembly and a water storage tank, the water washing assembly is communicated with the second light liquid outlet, and has the third light liquid outlet and the third heavy liquid outlet;

[0014] The liquid outlet end of the water storage tank is communicated with the water washing assembly.

[0015] In one embodiment thereof, sulfonate extraction system further includes dilute acid storage tank, the liquid inlet end of the dilute acid storage tank is communicated with the first heavy liquid outlet.

[0016] In one embodiment thereof, sulfonate extraction system further includes stripping device, the stripping device includes stripping assembly, the stripping assembly is communicated with the third light liquid outlet, and the stripping assembly has ammonia inlet and liquid outlet.

[0017] In one embodiment thereof, the stripping device further includes ammonia storage tank, the ammonia storage tank is communicated with the ammonia inlet.

[0018] In one embodiment thereof, sulfonate extraction system further includes separation device, the separation device includes separation assembly, the separation assembly is communicated with the liquid outlet, and has fourth light liquid outlet and the fourth heavy liquid outlet.

[0019] In one embodiment thereof, the fourth light liquid outlet is communicated with the extractant storage tank.

[0020] In one embodiment thereof, the separation assembly further includes stripping liquid storage tank, the stripping liquid storage tank is communicated with the fourth heavy liquid outlet.

[0021] In one of the embodiments, the first extraction device comprises an extraction tank, a plurality of partitions, the extraction tank is provided with a first heavy liquid outlet and a first light liquid outlet, the plurality of partitions are arranged in the extraction tank and separate the internal cavity of the extraction tank into a mixing cavity and an overflow cavity, the partitions are arranged at intervals and form overflow channels, the overflow channels communicate the mixing cavity and the overflow cavity, the mixing cavity communicates with the first heavy liquid outlet, and the overflow cavity communicates with the first light liquid outlet.

[0022] In one of the embodiments, the first extraction device further comprises a stirring assembly, the stirring assembly comprises a stirring paddle and a driving member, the stirring paddle is rotatably arranged in the mixing cavity, and the driving member connects the extraction tank and the stirring paddle and drives the stirring paddle to rotate.

[0023] Compared with the prior art, the sulfonated material extraction system provided by the utility model, in the second extraction device, the sulfonated material is extracted with the extractant discharged from the first light liquid outlet of the first extraction device, the obtained organic phase enters the washing device from the second light liquid outlet after extraction, and the aqueous phase returns to the first extraction device from the second heavy liquid outlet; in the first extraction device, the extractant in the extractant storage tank enters the first extraction device, the extractant contacts the aqueous phase returned from the second extraction device, the formed organic phase is introduced into the second extraction device, and the formed aqueous phase is discharged for storage; in the washing device, the organic phase discharged from the second extraction device is washed in the washing device, the impurities mixed in the organic phase are fully separated from the aqueous phase in the process of washing, the separated organic phase is discharged from the third light liquid outlet, and the aqueous phase returns to the second extraction device from the third heavy liquid outlet, so that the organic phase and the aqueous phase in the washing water can be fully separated.

[0024] Through the above device, the organic phase in the extraction process can be twice extracted, and the aqueous phase formed in the washing process can be recycled, so that the sulfonated material can be fully collected and lost, meanwhile, the organic phase after extraction can be washed twice, so that the dilute acid in the sulfonated material can be fully separated, the sulfonated material can be purified, and the purity and yield of the sulfonated material are improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the structure schematic view of the sulfonated material extraction system provided by the utility model embodiment;

[0026] Figure 2 is the structure schematic view of the extractant storage tank, the first extraction device and the dilute acid storage tank in the sulfonated material extraction system provided by the utility model embodiment;

[0027] Figure 3 is the structure schematic view of the first extraction device in the sulfonated material extraction system provided by the utility model embodiment;

[0028] Figure 4 is a structural schematic view of a second extraction device in a sulfonated material extraction system provided by the embodiments of the present application;

[0029] Figure 5 is a structural schematic view of a water washing device in a sulfonated material extraction system provided by the embodiments of the present application;

[0030] Figure 6 is a structural schematic view of a back extraction device in a sulfonated material extraction system provided by the embodiments of the present application;

[0031] Figure 7 is a structural schematic view of a separation device in a sulfonated material extraction system provided by the embodiments of the present application.

[0032] Mark explanation:

[0033] extraction agent storage tank 1;

[0034] sulfonated material storage tank 2;

[0035] first extraction device 3; extraction tank 31; partition 32; stirring assembly 33; stirring paddle 331; driving member 332; first light liquid outlet 3a; first heavy liquid outlet 3b; mixing cavity 3c; overflow cavity 3d; overflow channel 3e;

[0036] second extraction device 4; second light liquid outlet 4a; second heavy liquid outlet 4b;

[0037] water washing device 5; water washing assembly 51; water washing tower 511; dispersion disc 512; water storage tank 52; third light liquid outlet 5a; third heavy liquid outlet 5b; light liquid inlet 5c; heavy liquid inlet 5d;

[0038] dilute acid storage tank 6;

[0039] back extraction device 7; back extraction assembly 71; ammonia water inlet 71a; liquid outlet 71b; ammonia water storage tank 72;

[0040] separation device 8; separation assembly 81; fourth light liquid outlet 81a; fourth heavy liquid outlet 81b; back extraction liquid storage tank 82. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0042] In order to solve the technical problem of loss of sulfonated material in the extraction process, the present application provides a sulfonated material extraction system, which can reduce the loss of sulfonated material in the extraction process.

[0043] It should be noted that the sulfonate extraction system in the present invention is used for but not limited to the extraction of sulfonated materials. For the sake of convenience, in the present invention, only the application of the sulfonate extraction system to the extraction of sulfonated materials is used as an example for explanation. The principles of the sulfonate extraction system applied to the extraction of other types of materials are essentially the same as those applied to the extraction of sulfonates, and will not be elaborated here.

[0044] See also Figure 1 , Figure 1 This is a structural schematic diagram of a sulfonate extraction system in one embodiment of the present invention. A sulfonate extraction system includes an extractant storage tank 1, a sulfonate storage tank 2, a first extraction device 3, a second extraction device 4, and a water washing device 5. The first extraction device 3 is connected to the liquid outlet of the extractant storage tank 1 and has a first light liquid outlet 3a and a first heavy liquid outlet 3b; the second extraction device 4 is connected to the first light liquid outlet 3a and the liquid outlet of the sulfonate storage tank 2, and has a second light liquid outlet 4a and a second heavy liquid outlet 4b, and the second heavy liquid outlet 4b is connected to the first extraction device 3; the water washing device 5 is connected to the second light liquid outlet 4a, and has a third light liquid outlet 5a and a third heavy liquid outlet 5b, and the second heavy liquid outlet 4b is connected to the second extraction device 4.

[0045] Specifically, in the second extraction device 4, the sulfonated material is extracted with the extractant discharged from the first light liquid outlet 3a of the first extraction device 3, and the organic phase obtained after extraction enters the water washing device 5 from the second light liquid outlet 4a, and the aqueous phase returns to the first extraction device 3 from the second heavy liquid outlet 4b; in the first extraction device 3, the extractant in the extractant storage tank 1 enters the first extraction device 3, and the extractant contacts the aqueous phase returned from the second extraction device 4, and the formed organic phase is passed into the second extraction device 4, and the formed aqueous phase is discharged for storage; in the water washing device 5, the organic phase discharged from the second extraction device 4 is washed with water in the water washing device 5, and during the washing process, the mixed impurities in the organic phase are fully separated from the aqueous phase, and the separated organic phase is discharged from the third light liquid outlet 5a, and the aqueous phase returns to the second extraction device 4 from the third heavy liquid outlet 5b, thereby being able to fully separate the organic phase and the aqueous phase in the washing water.

[0046] The above-mentioned device can perform secondary extraction on the organic phase in the extraction process and circulate the aqueous phase formed in the water washing process, thereby ensuring that the sulfonated material is fully collected and the loss of the sulfonated material is avoided. At the same time, the organic phase after extraction undergoes two extractions and water washings, which can fully separate the dilute acid in the sulfonated material, realize the purification of the sulfonated product, and improve the purity and yield of the sulfonated material.

[0047] It should be understood that the first extraction device 3 and the second extraction device 4 can be a centrifugal extractor, a sieve plate extraction column, a rotary disc extraction column, etc.

[0048] Specifically, as shown in Figure 2 and Figure 3 one of the embodiments, the first extraction device 3 comprises an extraction tank 31, a plurality of partitions 32, the extraction tank 31 is provided with a first heavy liquid outlet 3b and a first light liquid outlet 3a, the plurality of partitions 32 are built-in in the extraction tank 31 and separate the internal cavity of the extraction tank 31 into a mixing cavity 3c and an overflow cavity 3d, and the plurality of partitions 32 are arranged at intervals and are formed with overflow channels 3e, the overflow channels 3e communicate the mixing cavity 3c and the overflow cavity 3d, the mixing cavity 3c communicates with the first heavy liquid outlet 3b, and the overflow cavity 3d communicates with the first light liquid outlet 3a.

[0049] Specifically, during extraction, the extraction agent and the aqueous phase enter the mixing cavity 3c through the inlet provided on the extraction tank 31, and are mixed in the mixing cavity 3c. During the mixing process, the density of the organic phase is small, and the density of the aqueous phase is large. The organic phase overflows into the overflow cavity 3d through the overflow channels 3e, and flows out from the first light liquid outlet 3a at the bottom of the overflow cavity 3d. The aqueous phase flows out from the first heavy liquid outlet 3b at the bottom of the mixing cavity 3c.

[0050] Among them, the plurality of partitions 32 are distributed at intervals along the horizontal direction, and part of them are connected to the top inner wall of the extraction tank 31, and the other part are connected to the bottom inner wall of the extraction tank 31.

[0051] In order to promote the full mixing of the liquid in the stirring cavity, for this purpose, as shown in Figure 3 one of the embodiments, the first extraction device 3 further comprises a stirring assembly 33, the stirring assembly 33 comprises a stirring paddle 331 and a driving member 332, the stirring paddle 331 is rotatably built-in in the mixing cavity 3c, and the driving member 332 is connected to the extraction tank 31 and the stirring paddle 331 and is used to drive the stirring paddle 331 to rotate.

[0052] Start the driving member 332, and the driving member 332 drives the stirring paddle 331 to rotate. The rotating stirring paddle 331 mixes and stirs the liquid in the mixing cavity 3c. Among them, the driving member 332 can be a driving motor, a hydraulic motor, etc.

[0053] Among them, the structure of the second extraction device 4 is the same as that of the first extraction device 3, the second light liquid outlet 4a in the second extraction device 4 is the first light liquid outlet 3a in the first extraction device 3, and the second heavy liquid outlet 4b in the second extraction device 4 is the first heavy liquid outlet 3b in the first extraction device 3.

[0054] It should be understood that the water washing device 5 can be a stirring tank, a rotary disc type washer, etc., as shown in Figure 5As shown, in one embodiment, the water washing device 5 includes a water washing component 51 and a water storage tank 52. The water washing component 51 is connected to the second light liquid outlet 4a and has a third light liquid outlet 5a and a third heavy liquid outlet 5b; the liquid outlet end of the water storage tank 52 is connected to the water washing component 51.

[0055] By setting up a water washing component 51, the water washing component 51 can wash the organic phase discharged from the second extraction device 4 to remove acidic substances in the organic phase; by setting up a water storage tank 52, the water storage tank 52 can pass water into the water washing component 51 to supply water to the water washing component 51.

[0056] It should be understood that the water washing component 51 can be a vertical washing tower, a horizontal washing tower, a hollow washing tower, etc. Specifically, Figure 5 As shown, in one embodiment, the water washing component 51 includes a water washing tower 511 and a dispersion disk 512. The water washing tower 511 is provided with a third light liquid outlet 5a, a third heavy liquid outlet 5b, a light liquid inlet 5c, and a heavy liquid inlet 5d. The third light liquid outlet 5a is located above the third heavy liquid outlet 5b, and the heavy liquid inlet 5d is located above the light liquid inlet 5c. The light liquid inlet 5c is connected to the second light liquid outlet 4a, and the washing water enters the water washing tower 511 from the heavy liquid inlet 5d; the dispersion disk 512 is built into the water washing tower 511 and is arranged between the heavy liquid inlet 5d and the light liquid inlet 5c. The dispersion disk 512 is provided with a plurality of spaced liquid equalization holes.

[0057] The organic phase flowing out of the second extraction device 4 is introduced into the bottom of the water washing tower 511 from the light liquid outlet, and the washing water enters the top of the water washing tower 511 from the heavy liquid inlet 5d. The organic phase flows upward and the washing water flows downward, and the two are in countercurrent contact, which can wash the first organic phase. During the process of the organic phase rising and the washing water falling, they must pass through the liquid balancing holes of the dispersion disk 512, which can fully disperse the organic phase and washing water passing through, so that the organic phase and washing water are in full contact.

[0058] In order to collect the aqueous phase discharged from the first extraction device 3, for this purpose, as Figure 1 As shown, in one embodiment, the sulfonate extraction system further includes a dilute acid storage tank 6, and the liquid inlet end of the dilute acid storage tank 6 is connected to the first heavy liquid outlet 3b.

[0059] In the first extraction device 3 , the aqueous phase formed after extraction contains dilute acid, and the aqueous phase flows from the first heavy liquid outlet 3 b of the first extraction device 3 into the dilute acid storage tank 6 to collect the aqueous phase discharged from the first extraction device 3 .

[0060] In order to strip the material after extraction and washing, Figure 1 and Figure 6As shown in the drawings, in one of the embodiments, the sulfide extraction system further comprises a stripping device 7, the stripping device 7 comprises a stripping assembly 71, the stripping assembly 71 is connected with the third light liquid outlet 5a, and the stripping assembly 71 has an ammonia water inlet 71a and a liquid outlet 71b.

[0061] By arranging the stripping assembly 71, in the stripping assembly 71, the ammonia water is mixed with the organic phase, and after mixing, the stripping liquid and the extractant are obtained, and the stripping liquid and the extractant flow out from the liquid outlet 71b.

[0062] It should be understood that the stripping assembly 71 can be a mixing tank, a reaction kettle, a stirring tank, etc.

[0063] In order to supply the stripping assembly 71 with ammonia water, for this purpose, as shown in the drawings, Figure 6 in one of the embodiments, the stripping device 7 further comprises an ammonia water storage tank 72, and the ammonia water storage tank 72 is connected with the ammonia water inlet 71a.

[0064] By arranging the ammonia water storage tank 72, the ammonia water stored in the ammonia water storage tank 72 can enter the stripping assembly 71 through the ammonia water inlet 71a, and the ammonia water is stripped with the organic phase in the stripping assembly 71.

[0065] In order to separate the extractant and the stripping liquid obtained after stripping, for this purpose, as shown in the drawings, Figure 7 in one of the embodiments, the sulfide extraction system further comprises a separation device 8, the separation device 8 comprises a separation assembly 81, the separation assembly 81 is connected with the liquid outlet 71b, and has a fourth light liquid outlet 81a and a fourth heavy liquid outlet 81b.

[0066] After the extractant and the stripping liquid enter the separation assembly 81, they are allowed to stand and stratify, and then the extractant and the stripping liquid are separated after stratification.

[0067] It should be understood that the separation assembly 81 can be a centrifugal extractor, a sieve plate extraction column, a rotating disc extraction column, etc. Specifically, the separation assembly 81 is a separation tower, and the fourth light liquid outlet 81a is arranged at the top of the separation tower, and the fourth heavy liquid outlet 81b is arranged at the bottom of the separation tower.

[0068] After the mixed solution enters the separation tower, it is allowed to stand and stratify, the extractant flows out from the fourth light liquid outlet 81a, and the stripping liquid flows out from the fourth heavy liquid outlet 81b.

[0069] In order to reuse the extractant, for this purpose, as shown in the drawings, Figure 1 and Figure 4 in one of the embodiments, the fourth light liquid outlet 81a is connected with the extractant storage tank 1.

[0070] In the separation assembly 81, the extractant and the stripping solution are separated, the separated extractant is discharged from the fourth light liquid outlet 81a, and the discharged extractant is returned to the extractant storage tank 1, so that the extractant is recycled.

[0071] In order to collect the stripping solution separated in the separation assembly 81, as shown in Figure 1 and Figure 7 In one embodiment, the separation assembly 81 further comprises a stripping solution storage tank 82, which is connected to the fourth heavy liquid outlet 81b.

[0072] By providing the stripping solution storage tank 82, the stripping solution separated in the separation assembly 81 can be collected and stored.

[0073] It should be understood that in the K acid production process, the stripping solution needs to undergo ammoniation, deamination, acidification and solid-liquid separation. The ammoniation is carried out in a reaction kettle or a micro-reactor, the deamination is carried out in a distillation column, the acidification is carried out in a reaction kettle or a micro-reactor, and the solid-liquid separation is carried out in a solid-liquid separator. The reaction kettle, the distillation column, the reaction kettle and the solid-liquid separator are sequentially connected to treat the stripping solution. This process is the existing technology, which will not be described in detail in the present application.

[0074] It should be understood that in the present application, the parts that need to be connected are connected by pipelines, and the parts that need to be liquid-conveyed or liquid-introduced can be conveyed by a circulating pump and a conveying pump.

[0075] It should be understood that in the present application, valves can be provided on the liquid inlets, the liquid outlets, the heavy liquid outlets, the light liquid outlets and the pipelines, which are used to control the opening or closing of the corresponding openings and pipelines.

[0076] The specific embodiments of the present application described above do not constitute a limitation on the scope of protection of the present application. Any other corresponding changes and modifications made according to the technical concept of the present application shall be included in the scope of protection of the claims of the present application.

Claims

1. A sulfonate extraction system, characterized in that: include: Extractant storage tank; Sulfonate storage tanks; a first extraction device, connected to the liquid outlet of the extractant storage tank, and having a first light liquid outlet and a first heavy liquid outlet; a second extraction device, connected to the first light liquid outlet and the liquid outlet of the sulfonate storage tank, and having a second light liquid outlet and a second heavy liquid outlet, wherein the second heavy liquid outlet is connected to the first extraction device; and The water washing device is connected to the second light liquid outlet and has a third light liquid outlet and a third heavy liquid outlet. The second heavy liquid outlet is connected to the second extraction device.

2. The sulfonate extraction system according to claim 1, characterized in that: The water washing device includes a water washing component and a water storage tank, the water washing component is connected to the second light liquid outlet, and has the third light liquid outlet and the third heavy liquid outlet; The liquid outlet end of the water storage tank is communicated with the water washing component.

3. The sulfonate extraction system according to claim 1, characterized in that: It also includes a dilute acid storage tank, wherein the liquid inlet end of the dilute acid storage tank is connected to the first heavy liquid outlet.

4. The sulfonate extraction system according to claim 1, characterized in that: It also includes a stripping device, which includes a stripping component. The stripping component is connected to the third light liquid outlet, and the stripping component has an ammonia water inlet and a liquid outlet.

5. The sulfonate extraction system according to claim 4, characterized in that: The stripping device further comprises an ammonia water storage tank, which is connected to the ammonia water inlet.

6. The sulfonate extraction system according to claim 4, characterized in that: The invention also includes a separation device, which includes a separation component. The separation component is connected to the liquid outlet and has a fourth light liquid outlet and a fourth heavy liquid outlet.

7. The sulfonate extraction system according to claim 6, characterized in that: The fourth light liquid outlet is connected to the extractant storage tank.

8. The sulfonate extraction system according to claim 6, characterized in that: The separation component further includes a stripping liquid storage tank, which is connected to the fourth heavy liquid outlet.

9. The sulfonate extraction system according to claim 1, characterized in that: The first extraction device includes an extraction tank and multiple partitions. The extraction tank is provided with a first heavy liquid outlet and a first light liquid outlet. The multiple partitions are built into the extraction tank and divide the internal cavity of the extraction tank into a mixing chamber and an overflow chamber. The multiple partitions are arranged at intervals and form an overflow channel. The overflow channel connects the mixing chamber and the overflow chamber. The mixing chamber is connected to the first heavy liquid outlet, and the overflow chamber is connected to the first light liquid outlet.

10. The sulfonate extraction system according to claim 9, characterized in that: The first extraction device further includes a stirring assembly, which includes a stirring paddle and a driving member. The stirring paddle is rotatably built into the mixing chamber, and the driving member is connected to the extraction tank and the stirring paddle to drive the stirring paddle to rotate.

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