Method and equipment for dephenolizing cottonseed meal

Abstract

The invention relates to the technical field of cottonseed meal processing, in particular to a dephenolization method and equipment for cottonseed meal, and the dephenolization method for cottonseed meal comprises the following steps: step S1, leaching cottonseed meal by using a leaching solution to obtain cottonseed protein and a dephenolization solution; s2, slowly performing negative pressure evaporation concentration on the dephenolized liquid obtained in the step S1 through a slit from top to bottom to obtain solvent vapor and a phenol-containing base solution; s3, settling the phenol-containing base solution obtained in the step S2, and taking a supernatant to obtain a separation solution; s4, condensing the solvent steam obtained in the step S2 to obtain a polar solvent; and S5, mixing the separation liquid obtained in the step S3 with the polar solvent obtained in the step S4 to obtain the leaching liquid used in the step S1. According to the method, the wastewater discharge amount in the cottonseed dephenolization process can be reduced, the burden of sewage treatment and environmental pollution can be reduced, and the cottonseed protein product with higher nutritional value than the cottonseed protein prepared by the dephenolization method in the prior art can be obtained.

Description

Technical Field

[0001] The invention relates to the technical field of cottonseed meal processing, and in particular to a method and equipment for dephenolizing cottonseed meal. Background Art

[0002] With the advancement of technology, the cottonseed processing industry has shifted from the traditional high-temperature meal production process to the low-temperature dephenolization protein process. However, whether it is the chemical method, solvent extraction method or microbial fermentation method, dephenolization wastewater will be generated during the dephenolization process, commonly known as dephenolization liquid. These wastewaters are usually discharged directly or treated by traditional biochemical methods, which brings a great burden to the company. In addition, dephenolization liquid usually contains raffinose, protein, etc., which reduces the nutritional value of the product.

[0003] The invention patent with application number 201711245724.2 discloses an industrial method for recovering cottonseed sugar from waste. Although it can collect some materials from the waste to increase the added value of the product, it cannot reduce the amount of wastewater discharged and cannot reduce the burden on the enterprise.

[0004] Therefore, developing a method and equipment for dephenolizing cottonseed meal that can minimize wastewater discharge and improve the nutritional value of the product is an issue that urgently needs to be addressed. Summary of the invention

[0005] To solve the above problems, the present invention provides a method and equipment for dephenolizing cottonseed meal, which can reduce the amount of wastewater discharged during the cottonseed dephenolization process, reduce the burden of sewage treatment and environmental pollution, and another effect of the present invention is to obtain a product with higher nutritional value of cottonseed protein than that obtained by the dephenolization method of the prior art.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A method for dephenolizing cottonseed meal comprises the following steps:

[0008] Step S1: using a leaching solution to leaching cottonseed meal to obtain cottonseed protein and dephenolization solution;

[0009] Step S2: slowly passing the dephenolized liquid obtained in step S1 from top to bottom through the slit for negative pressure evaporation and concentration to obtain solvent vapor and phenol-containing bottom liquid;

[0010] Step S3: sedimenting the phenol-containing bottom liquid obtained in step S2, taking the upper layer liquid to obtain a separated liquid;

[0011] Step S4: condensing the solvent vapor obtained in step S2 to obtain a polar solvent;

[0012] Step S5: Mix the separated liquid obtained in step S3 with the polar solvent obtained in step S4 to obtain the leaching liquid used in step S1.

[0013] The method carries out negative pressure evaporation and concentration on the dephenolization liquid obtained after dephenolization, wherein the solvent vapor is condensed to form a polar solvent, after the polar solvent is removed, the gossypol is precipitated because the solubility of the gossypol in the phenol-containing base liquid is greatly reduced, the precipitated gossypol is precipitated to obtain a separation liquid, the separation liquid is mixed with the polar solvent to become an extract again, the wastewater discharge in the whole process is very small, and the gossypol crystals can be recovered, and the gossypol crystals are used as by-products after purification, and have extremely high economic value, which not only saves the economic pressure of wastewater treatment, but also can generate additional economic benefits.

[0014] In the dephenolization method of cottonseed meal of the present invention, since the separation liquid is reused, raffinose and protein are always dissolved in the separation liquid. In the process of evaporating the polar solvent, the solubility of raffinose and protein becomes larger and larger, and they will not precipitate with the cottonphenol. When the separation liquid is mixed with the solvent to form an exudate, the raffinose and protein are in a saturated state, and the raffinose and protein will not continue to be leached from the cottonseed meal, so that the raffinose and protein contents in the dephenolized cottonseed protein are higher than those obtained by the dephenolization method in the prior art. Therefore, the cottonseed protein produced by the present invention has higher nutritional value than the cottonseed protein produced by the prior art.

[0015] The slit heating evaporation can not only evaporate the dephenolization solution quickly, but also evaporate the polar solvent completely, so that the dephenolization solution produces a concentration gradient in the slit, thereby promoting the precipitation of cottonpol.

[0016] Furthermore, the leaching solution used in step S1 comprises, by mass percentage, 91%-94% methanol, 5%-9% water and 0.1% citric acid.

[0017] The use of the leaching solution of the present scheme can more effectively extract cottonseed phenol without causing the loss of cottonseed sugar and protein. A methanol ratio exceeding 90% is conducive to reducing the solubility of cottonseed sugar and protein. However, in order to prevent cottonseed sugar from precipitating when evaporating the polar solvent, the water content of the leaching solution cannot be too low, and needs to be at least 5%, that is, when the solution is concentrated 20 times, it is ensured that cottonseed sugar does not precipitate. During evaporation, cottonseed sugar and protein do not precipitate, and only cottonseed phenol precipitates. Under acidic conditions, it is conducive to converting bound cottonseed phenol into free cottonseed phenol. The leaching solution added with citric acid can more effectively promote the leaching of cottonseed phenol and reduce the cottonseed phenol content as a whole.

[0018] Furthermore, in step S1, the temperature for leaching the cottonseed meal with the leaching liquid is 40° C.-45° C., the solid-liquid ratio is 1:1.5-1:2, and the leaching time is 40 min-60 min.

[0019] The leaching temperature is close to the boiling point of methanol. On the one hand, it is beneficial to the evaporation of methanol. On the other hand, the relatively high temperature can promote the leaching of cottony phenol without causing the protein to combine with cottony phenol. When using negative pressure conditions, the temperature can be appropriately lowered.

[0020] Furthermore, in step S2, the pressure of evaporation and concentration of the dephenolization liquid is 0.5 atmospheres, and the temperature of the phenol-containing bottom liquid is greater than the boiling point of the polar solvent.

[0021] The temperature of the phenol-containing base liquid is greater than the boiling point of the polar solvent, which can ensure that the solvent is completely evaporated. The main component of the phenol-containing base liquid is water, which contains a small amount of citric acid, raffinose, protein and gossypol. At this time, the solvent is a 1%-2% aqueous solution of citric acid. The solubility of gossypol in this solvent is very low, and the precipitation is more complete and the enrichment is faster, which can maintain the leaching efficiency of the re-mixed extract at a high level.

[0022] A cottonseed meal dephenolization device comprises an extractor, a separator and a buffer tank, wherein the separator comprises:

[0023] A kettle body, wherein the upper end of the kettle body is connected to a condenser, a jacket is arranged outside the lower part of the kettle body, the lower end of the jacket is connected to an inlet pipe, and the upper end is connected to an outlet pipe, a liquid inlet pipe is connected to the middle of the side wall of the kettle body, the liquid inlet pipe is connected to a liquid outflow pipeline of the extractor through a first delivery pump, and a connecting pipe is arranged at the lower end of the kettle body;

[0024] A liquid receiving cylinder, the liquid receiving cylinder is connected to the upper part of the kettle body, the upper end opening of the liquid receiving cylinder is opposite to the reflux end of the condenser, the lower part of the liquid receiving cylinder is connected to a first liquid outlet pipe, and the first liquid outlet pipe passes through the kettle body and is connected to the buffer tank;

[0025] A separation body, wherein there is a gap between the separation body and the lower inner wall of the kettle body, and the gap between the separation body and the lower inner wall of the kettle body is a slit;

[0026] An enrichment box, wherein the enrichment box is sleeved outside the connecting pipe, and the upper end of the side wall of the enrichment box is connected with a second liquid outlet pipe, and the second liquid outlet pipe is connected with the buffer tank;

[0027] The lower part of the buffer tank is connected to the liquid inflow pipeline of the extractor through the second delivery pump.

[0028] The cottonseed meal dephenolization equipment of the present technical solution is different from the dephenolization equipment in the prior art because it has a separation body. There is a slit between the separation body and the lower inner wall of the kettle body. The slit allows the dephenolization liquid in the kettle body to form a concentration gradient in the slit. The dephenolization liquid in the slit facing the upper part of the separation body is evaporated and desolventized, and a phenol-containing bottom liquid is gradually formed in the slit facing the lower part of the separation body. The concentration gradient classification is achieved without using a distillation device. One device realizes steps S2 to S5 of the cottonseed meal dephenolization method of the present invention.

[0029] Furthermore, a plurality of flow guides located in the slits are provided on the side of the separation body facing the inner wall of the kettle body, the flow guides are spirally coiled and connected to the separation body, and the space between every two adjacent flow guides is a flow guide channel.

[0030] The guide channel lengthens the flow path of the phenolic base liquid, increases the heating time of the jacket, and increases the concentration gradient of the phenolic base liquid, which is more conducive to complete evaporation of the polar solvent.

[0031] Furthermore, a driving shaft is connected to the lower end of the separation body, and the lower end of the driving shaft passes through the connecting pipe and the enrichment box and is connected to the output shaft of the driving motor located below the enrichment box, and the flow guide is in sliding contact with the inner wall of the kettle body.

[0032] The separation body is driven by the driving motor to rotate, and the guide piece is in sliding contact with the inner wall of the kettle body, pushing the precipitated cottonphenol toward the connecting pipe to avoid blockage and make the enrichment of cottonphenol smoother.

[0033] Furthermore, the guide member is a tubular body with a closed lower end and an open upper end, and mesh holes are arranged on a side wall of the guide member facing the lower end of the separation body.

[0034] The mesh allows the vapor of the solvent to pass through, thereby separating the gas and liquid phases. The vapor of the polar solvent moves upward along the inner hole of the guide piece to avoid the dephenolization liquid being difficult to descend due to the vapor of the polar solvent. The mesh has the ability to break bubbles and can also inhibit the foaming of the phenol-containing bottom liquid.

[0035] Furthermore, the upper end of the separation body is connected to a cone, and the separation body and the cone are both made of stainless steel.

[0036] In the case of jacket heating, when there is no polar solvent in the phenolic base liquid, the temperature of the phenolic base liquid is higher than that of the polar solvent. The stainless steel material has good thermal conductivity. The separator and the cone can preheat the leachate above the separator and the cone due to the heat, thereby promoting evaporation.

[0037] Furthermore, the upper end of the jacket is higher than the upper end of the cone and lower than the lower end of the liquid receiving cylinder.

[0038] The purpose of setting the cone is to increase the liquid level of the leaching liquid in the kettle, increase the preheating area and increase the evaporation rate.

[0039] Furthermore, one end of the upper end of the enrichment box is high and the other end is low, the second liquid outlet pipe is connected to a side wall close to the lower side of the upper end of the enrichment box, the ratio of the inner diameter of the enrichment box to the inner diameter of the connecting pipe is greater than 5, and a filter net is provided in the enrichment box which is higher than the lower end of the connecting pipe and lower than the second liquid outlet pipe.

[0040] The enrichment box is used to settle the phenol-containing bottom liquid. When the ratio of the inner diameter of the enrichment box to the inner diameter of the connecting pipe is greater than 5, the flow rate in the enrichment box slows down rapidly, which is conducive to the deposition of cottonphenol crystals. The separated liquid passes through the filter screen and is extracted by the second liquid outlet pipe.

[0041] The enrichment box with one end higher than the other is mainly used to prevent the polar solvent from entering the second liquid outlet pipe in vapor state. When there is polar solvent vapor, it will first concentrate at the higher end of the enrichment box, and then condense into liquid and dissolve in the separation liquid as the temperature drops.

[0042] Beneficial Effects

[0043] The present invention discharges very little wastewater during the entire process of dephenolizing cottonseed meal, and can also recover cottonphenol crystals, which, as a by-product after purification, have extremely high economic value, not only saving the economic pressure of wastewater treatment, but also generating additional economic benefits.

[0044] The dephenolization method of the cottonseed meal of the present invention makes the raffinose and protein contents in the dephenolized cottonseed protein higher than those obtained by the dephenolization method in the prior art. Therefore, the cottonseed protein produced by the present invention has higher nutritional value than the cottonseed protein produced by the prior art.

[0045] The invention enables the cottonpol to be precipitated more completely and enriched more quickly, and can maintain the leaching efficiency of the remixed leaching solution at a higher level.

[0046] The cottonseed meal dephenolization device of the present invention is different from the devices in the prior art because it has a separation body with a slit between the separation body and the lower inner wall of the kettle body. This slit allows the dephenolization liquid in the kettle body to form a concentration gradient in the slit, and the concentration gradient classification is achieved without using a distillation device. One device can achieve steps S2 to S5 of the cottonseed meal dephenolization method of the present invention.

[0047] The cottonseed meal dephenolization device of the invention makes the extraction of cottonphenol more smooth and efficient, and can recover the cottonphenol. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural schematic diagram of a cottonseed meal dephenolization device of the present invention;

[0049] Figure 2 is a sectional front view of a separator of the present invention;

[0050] Figure 3 yes Figure 2 A magnified view of part A;

[0051] Figure 4 is a cross-sectional view of a separation body of the present invention;

[0052] Figure 5It is a bottom view of the separation body of the present invention.

[0053] The numbers in the attached drawings are: 1. extractor; 2. buffer tank; 3. kettle body; 4. condenser; 5. jacket; 6. liquid inlet pipe; 7. first delivery pump; 8. connecting pipe; 9. liquid receiving cylinder; 10. first liquid outlet pipe; 11. separation body; 12. slit; 13. enrichment box; 14. second liquid outlet pipe; 15. second delivery pump; 16. guide member; 17. drive shaft; 18. drive motor; 19. mesh; 20. cone; 21. filter screen. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0055] Embodiment 1:

[0056] A method for dephenolizing cottonseed meal comprises the following steps:

[0057] Step S1: using a leaching solution to leach cottonseed meal to obtain cottonseed protein and dephenolization solution, the leaching solution includes 90.9% methanol, 9% water and 0.1% citric acid by mass percentage, the leaching temperature is 45° C., the solid-liquid ratio is 1:1.5, and the leaching time is 60 minutes.

[0058] Step S2: slowly passing the dephenolized liquid obtained in step S1 from top to bottom through a slit to be evaporated and concentrated under negative pressure at 0.5 times the atmospheric pressure to obtain solvent vapor and a phenol-containing bottom liquid. The temperature of the phenol-containing bottom liquid is greater than the boiling point of the polar solvent. The lower the negative pressure evaporation pressure, the more favorable it is, but the energy consumption also gradually increases.

[0059] Step S3: sedimenting the phenol-containing bottom liquid obtained in step S2, taking the upper layer liquid to obtain a separated liquid;

[0060] Step S4: condensing the solvent vapor obtained in step S2 to obtain a polar solvent;

[0061] Step S5: Mix the separated liquid obtained in step S3 with the polar solvent obtained in step S4 to obtain the leaching liquid used in step S1.

[0062] Embodiment 2:

[0063] A method for dephenolizing cottonseed meal comprises the following steps:

[0064] Step S1: using an extracting solution to extract cottonseed meal to obtain cottonseed protein and dephenolized solution, the extracting solution comprises 93% methanol, 6.9% water and 0.1% citric acid by mass percentage, the extracting temperature is 45° C., the solid-liquid ratio is 1:1.5, and the extracting time is 40 minutes.

[0065] Step S2: slowly passing the dephenolized liquid obtained in step S1 from top to bottom through a slit to be evaporated and concentrated under negative pressure at 0.5 times the atmospheric pressure to obtain solvent vapor and a phenol-containing bottom liquid, wherein the temperature of the phenol-containing bottom liquid is greater than the boiling point of the polar solvent;

[0066] Step S3: sedimenting the phenol-containing bottom liquid obtained in step S2, taking the upper layer liquid to obtain a separated liquid;

[0067] Step S4: condensing the solvent vapor obtained in step S2 to obtain a polar solvent;

[0068] Step S5: Mix the separated liquid obtained in step S3 with the polar solvent obtained in step S4 to obtain the leaching liquid used in step S1.

[0069] Embodiment three:

[0070] A method for dephenolizing cottonseed meal comprises the following steps:

[0071] Step S1: using a leaching solution to leach cottonseed meal to obtain cottonseed protein and dephenolization solution, the leaching solution includes 94% methanol, 5.9% water and 0.1% citric acid by mass percentage, the leaching temperature is 40° C., the solid-liquid ratio is 1:1.2, and the leaching time is 40 minutes.

[0072] Step S2: slowly passing the dephenolized liquid obtained in step S1 from top to bottom through a slit to be evaporated and concentrated under negative pressure at 0.5 times the atmospheric pressure to obtain solvent vapor and a phenol-containing bottom liquid, wherein the temperature of the phenol-containing bottom liquid is greater than the boiling point of the polar solvent;

[0073] Step S3: sedimenting the phenol-containing bottom liquid obtained in step S2, taking the upper layer liquid to obtain a separated liquid;

[0074] Step S4: condensing the solvent vapor obtained in step S2 to obtain a polar solvent;

[0075] Step S5: Mix the separated liquid obtained in step S3 with the polar solvent obtained in step S4 to obtain the leaching liquid used in step S1.

[0076] Comparative Example:

[0077] A method for dephenolizing cottonseed meal comprises the following steps:

[0078] Step S1: using an extracting solution to extract cottonseed meal to obtain cottonseed protein and dephenolized solution, the extracting solution comprises 95% methanol, 4.9% water and 0.1% citric acid by mass percentage, the extracting temperature is 50° C., the solid-liquid ratio is 1:1.5, and the extracting time is 60 min.

[0079] Step S2: evaporating the leaching solution obtained in step S1, and collecting methanol and bottom liquid respectively;

[0080] Step S3: adding water and citric acid to the methanol obtained in step S2 according to the proportion in step S1 to form a new leachate;

[0081] Step S4: filtering the bottom liquid obtained in step S2 to obtain cottonyphenol and waste liquid;

[0082]

[0083]

[0084] In the examples of the present invention, the waste liquid mainly consists of the water entrained by the cottonpol, while the waste liquid in the comparative example mainly consists of the water added to the leaching solution.

[0085] like Figure 1 As shown, a cottonseed meal dephenolization device includes an extractor 1, a separator and a buffer tank 2, as shown in FIG. Figure 2 As shown, the separator comprises:

[0086] A kettle body 3, the upper end of which is connected to a condenser 4, the upper end of which is connected to a negative pressure pipeline, so that the pressure inside the kettle body is maintained at 0.5 atmospheres, a jacket 5 is arranged outside the lower part of the kettle body 3, a liquid inlet pipe 6 is connected to the middle of the side wall of the kettle body 3, the liquid inlet pipe 6 is connected to the liquid outflow pipeline of the extractor 1 through a first delivery pump 7, and a connecting pipe 8 is arranged at the lower end of the kettle body 3;

[0087] The liquid receiving barrel 9 is connected to the upper part of the kettle body 3, the upper end opening of the liquid receiving barrel 9 is opposite to the reflux end of the condenser 4, and the lower part of the liquid receiving barrel 9 is connected to the first liquid outlet pipe 10, which passes through the kettle body 3 and is connected to the buffer tank 2;

[0088] Separate 11, such as Figure 3 As shown, there is a gap between the separation body 11 and the lower inner wall of the kettle body 3, and the gap between the separation body and the lower inner wall of the kettle body is the slit 12;

[0089] An enrichment box 13, which is sleeved outside the connecting pipe 8, and an upper end of a side wall of the enrichment box 13 is connected with a second liquid outlet pipe 14, and the second liquid outlet pipe 14 is connected with the buffer tank 2;

[0090] The lower part of the buffer tank 2 is connected to the liquid inflow pipeline of the extractor 1 through the second delivery pump 15.

[0091] like Figure 4 and Figure 5 As shown, a plurality of flow guides 16 located in the slit 12 are provided on the side of the separation body 11 facing the inner wall of the kettle body 3. The plurality of flow guides 16 are spirally wound and connected to the separation body 11, and the space between each two adjacent flow guides 16 is a flow guide channel.

[0092] The lower end of the separation body 11 is connected to a driving shaft 17, and the lower end of the driving shaft 17 passes through the connecting pipe 8 and the enrichment box 13 and is connected to the output shaft of the driving motor 18 located below the enrichment box 13. The guide member 16 is in sliding contact with the inner wall of the kettle body 3. The sliding contact includes but is not limited to the guide member 16 directly contacting the inner wall of the kettle body 3, and an elastic scraper is provided on the guide member 16. The elastic scraper is in sliding contact with the inner wall of the kettle body 3, which is mainly used to make the precipitated cottonphenol fall into the connecting pipe 8 and not accumulate inside the kettle body 3.

[0093] The guide member 16 is a tubular body with a closed lower end and an open upper end. When the guide member 16 is spirally wound on the separation body 11, one of the side walls of the guide member 16 is connected to the separation body 11 and faces the center of the separation body 11, and the other side wall is inclined toward the lower end vertex of the separation body 11. Meshes 19 are arranged on one side wall of the guide member 16 facing the lower end of the separation body 11, and the meshes include but are not limited to circular meshes, triangular meshes or diamond meshes, and the mesh aperture is greater than the distance between two adjacent meshes.

[0094] like Figure 4 As shown, the upper end of the separation body 11 is connected to a cone 20 , and both the separation body 11 and the cone 20 are made of stainless steel. The upper end of the jacket 5 is higher than the upper end of the cone 20 and lower than the lower end of the liquid receiving cylinder 9 .

[0095] A rotary discharge valve or other online discharge mechanism (not shown) is provided at the lower end of the enrichment tank 13 to discharge cotton phenol during the production operation for continuous production.

[0096] like Figure 2 As shown, one end of the upper end of the enrichment box 13 is high and the other end is low, the second liquid outlet pipe 14 is connected to a side wall close to the lower side of the upper end of the enrichment box 13, the ratio of the inner diameter of the enrichment box 13 to the inner diameter of the connecting pipe 8 is greater than 5, and a filter screen 21 is provided in the enrichment box 13 which is higher than the lower end of the connecting pipe 8 and lower than the second liquid outlet pipe 14.

[0097] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

Claims

1. A method for dephenolizing cottonseed meal, characterized in that: The following steps are involved: Step S1: using a leaching solution to leaching cottonseed meal to obtain cottonseed protein and dephenolization solution; Step S2: slowly passing the dephenolized liquid obtained in step S1 from top to bottom through the slit (12) for negative pressure evaporation and concentration to obtain solvent vapor and phenol-containing bottom liquid; Step S3: sedimenting the phenol-containing bottom liquid obtained in step S2, taking the upper layer liquid to obtain a separated liquid; Step S4: condensing the solvent vapor obtained in step S2 to obtain a polar solvent; Step S5: Mix the separated liquid obtained in step S3 with the polar solvent obtained in step S4 to obtain the leaching liquid used in step S1.

2. The method for dephenolizing cottonseed meal according to claim 1, characterized in that: The leaching solution used in step S1 comprises, by mass percentage, 91%-94% methanol, 5%-9% water and 0.1% citric acid.

3. The method for dephenolizing cottonseed meal according to claim 2, characterized in that: In the step S1, the temperature for leaching the cottonseed meal with the leaching liquid is 40° C.-45° C., the material-liquid ratio is 1:1.5-1:2, and the leaching time is 40 min-60 min.

4. The method for dephenolizing cottonseed meal according to claim 1, characterized in that: The pressure of evaporation and concentration of the dephenolization liquid in step S2 is 0.5 atmospheres, and the temperature of the phenol-containing bottom liquid is greater than the boiling point of the polar solvent.

5. A cottonseed meal dephenolization device, using the cottonseed meal dephenolization method according to any one of claims 1 to 4, characterized in that: The invention comprises an extractor (1), a separator and a buffer tank (2), wherein the separator comprises: A kettle (3), wherein the upper end of the kettle (3) is connected to a condenser (4), a jacket (5) is arranged outside the lower part of the kettle (3), a liquid inlet pipe (6) is connected to the middle of the side wall of the kettle (3), the liquid inlet pipe (6) is connected to the liquid outflow pipeline of the extractor (1) through a first delivery pump (7), and a connecting pipe (8) is arranged at the lower end of the kettle (3); A liquid receiving cylinder (9), the liquid receiving cylinder (9) is connected to the upper part of the kettle body (3), the upper end opening of the liquid receiving cylinder (9) is opposite to the reflux end of the condenser (4), the lower part of the liquid receiving cylinder (9) is connected to a first liquid outlet pipe (10), and the first liquid outlet pipe (10) passes through the kettle body (3) and is connected to the buffer tank (2); A separation body (11), wherein a slit (12) is formed between the separation body (11) and the lower inner wall of the kettle body (3); An enrichment box (13), the enrichment box (13) is sleeved outside the connecting pipe (8), the upper end of the side wall of the enrichment box (13) is connected to a second liquid outlet pipe (14), and the second liquid outlet pipe (14) is connected to the buffer tank (2); The lower part of the buffer tank (2) is connected to the liquid inflow pipeline of the extractor (1) via a second delivery pump (15).

6. The dephenolization equipment for cottonseed meal according to claim 5, characterized in that: A plurality of flow guides (16) located in the slit (12) are provided on the side of the separation body (11) facing the inner wall of the kettle body (3); the flow guides (16) are spirally wound and connected to the separation body (11); and the space between each two adjacent flow guides (16) is a flow guide channel.

7. The dephenolization equipment for cottonseed meal according to claim 6, characterized in that: The lower end of the separation body (11) is connected to a driving shaft (17), and the lower end of the driving shaft (17) passes through the connecting pipe (8) and the enrichment box (13) and is connected to the output shaft of the driving motor (18) located below the enrichment box (13), and the flow guide (16) is in sliding contact with the inner wall of the kettle body (3).

8. The dephenolization equipment for cottonseed meal according to claim 6, characterized in that: The guide member (16) is a tubular body with a closed lower end and an open upper end. Meshes (19) are arranged on a side wall of the guide member (16) facing the lower end of the separation body (11).

9. The dephenolization equipment for cottonseed meal according to claim 5, characterized in that: The upper end of the separation body (11) is connected to a cone (20), and the separation body (11) and the cone (20) are both made of stainless steel. The upper end of the jacket (5) is higher than the upper end of the cone (20) and lower than the lower end of the liquid receiving cylinder (9).

10. The dephenolization equipment for cottonseed meal according to claim 5, characterized in that: The upper end of the enrichment box (13) is high at one end and low at the other end, and the second liquid outlet pipe (14) is connected to a side wall close to the lower side of the upper end of the enrichment box (13).

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