Cottonseed Protein Dephenolization Equipment

Section Introduction:

Cottonseed protein dephenolization production line fulfills continuous and mechanized production of cottonseed protein with CE, BV, and ISO 9001 approval This international advanced cottonseed protein technology designed compact process of crushing, imme

Cottonseeds Dephenolization Protein Extraction and Grinding Project
Cottonseed protein dephenolization production line

Cottonseed protein dephenolization production line fulfills continuous and mechanized production of cottonseed protein with CE, BV, and ISO 9001 approval. This international advanced cottonseed protein technology designed compact process of crushing, immersing, drying with stable operation, low solvent consumption, low production cost, high oil yield, complete dephenolization, high quality cottonseed protein and low residual methanol content etc.

Dephenolized cottonseed protein is a high quality feed protein material. Due to the use of a new process such as low temperature leaching and two solvent stepwise extraction in the process, the denaturation of the protein is greatly reduced, and the gossypol is taken out, so that the nutritional level is improved. The free gossypol content of dephenolated cottonseed protein product is less than or equal to 400ppm, the crude protein content is above 50%, and the ratio of total amino acid to crude protein is 95%, which can replace animal protein such as soybean meal, corn protein powder and fish meal. Widely Used in livestock and aquaculture feeds.

Cottonseed Protein Dephenolization Technology:
The patent technology of cottonseed protein dephenolization equipment obtains protein through process of low temperature pretreatment, oil extraction, dephenolization and other sections.
Secondary extraction dephenolization technology adopts two kinds of solvent to respectively extract oil and gossypol to ensure oil quality and complete dephenolization (free gossypol ≤0.04%, lower than food grade cotton protein free gossypol content regulated in WHO/FAO/INICEF international organization, and not more than 0.06%), while Phyllotreta enzymes generated by storage course of cottonseed is removed.
The wet meal with solvent is not processed but directly extracted to remove gossypol after oil extraction, which reduces consumption, and avoid thermal denaturation of the protein, and keeps product quality stable.

Cottonseed detoxification methods in China include chemical method, biological fermentation method, and solvent extraction method. Chemical method is to add metal ions to cotton meal to form a complex. The disadvantage is that the formed complex is still retained in cotton meal. The color is dark and the palatability is poor. Biological fermentation uses yeast to convert gossypol in cotton meal. The process conditions are difficult to control, and the nutritional value and effect are not guaranteed. The solvent extraction method uses the different solubility of gossypol in a certain solvent, extracts of gossypol and oil, and chooses a reasonable solvent to achieve its purpose, that is, the oil extraction rate is high, and the degree of protein destruction is the lowest. And gossypol is separated for reuse.
This process adopts our company's most advanced cottonseed dephenolized patented production process. This process inherits and develops the advantages of the solvent extraction method (to avoid as much as possible the thermal denaturation of protein and the combination of protein and free gossypol). Two solvents are used. The step-by-step extraction of oil and gossypol guarantees thorough dephenolization and the quality of the oil, and has perfect technological measures to ensure the separation and recovery of solvents, low solvent consumption, and avoiding thermal denaturation of proteins; making the product good in quality and nutritional value high. 

Extraction Dephenolization Process 
This process is one of the core processes, which is divided into five parts: (1) degreasing, (2) dephenolization, (3) mixed oil filtration, (4) mixed liquid filtration, (5) material transportation quantitative in and out transportation system.
Degreasing and dephenolization are completed in an extractor. The filtering system uses a vertical basket automatic filter. The key equipment includes: Extracting dephenolizer, filter, pump, scraper conveyor, and material level control system.

Protein dissolution is mainly divided into two parts: protein drying and solvent recovery
In order to improve the efficiency of protein drying, ensure the smooth production, and improve the quality of protein, three-stage drying technology is used for drying. The solvent recovery mainly includes recovery and separation of two solvents. The classified solvent separation system realizes effective separation and recycling of two solvents.

Evaporation, stream stripping
The mixed oil is filtered through a filter, and the separated mixed oil is fed into a salting-out tank, and the salted oil is introduced into the first evaporator, and the mixed oil from the first evaporator is introduced into the second evaporator, and the second evaporator is discharged. The oil enters the stripper, and the stripped oil into the crude oil tank is pumped to the refining workshop.

Solvent cooling and water separation section 
The recovery system includes methanol recovery system and hexane recovery system.
A. Distillation process of methanol
Methanol is recovered from phenol-containing methanol and phenol-free. The phenol-containing methanol mixture is filtered through two stages, and then enters the rectification tower for rectification and purification, and is cooled and recovered by the corresponding heat exchanger for reuse.
The phenol-free methanol is independently placed in a temporary storage tank, and is appropriately purified according to production needs and then entered into the production line for secondary use.
B. The hexane recovery is basically the same as the traditional process.
C. Exhaust gas recovery: Exhaust gas is composed of frozen recovery and paraffin recovery.

Main economic and technical indicators
1, cottonseed quality: a, A grade of cottonseed; b, light seed, cottonseed residual rate of 3 ~ 5%; c, moisture 8 ~ 12%, d, no mixed grade.
2, solvent quality: a, 6# solvent oil, in line with national standards. b. The quality of methanol is in line with national standards.
3. Quality of refined cottonseed oil: in line with GB1537-2003 standard.
4. Protein content ≥ 50%.
5. Free gossypol content <0.04%.
6, protein residual oil ≤ 1.5%.
7, protein residue: No. 6# solvent ≤ 0.05%, methanol content ≤ 0.08%.
8, water ≤ 6.
9, comprehensive solvent consumption: ≤ 10kg / ton cottonseeds (No. 6# solvent oil + methanol)

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