Soap foot and oil foot acidification reaction system and process

Abstract

The invention belongs to the technical field of grease acidification, and particularly discloses a soapstock and oil foots acidification reaction system and a soapstock and oil foots acidification reaction process. The soapstock and oil foots acidification reaction system comprises a buffer tank for preheating raw materials, and an outlet pipeline of the buffer tank is communicated with an inlet of a heater; the soap stock and the oil stock heated by the heater are fed into a mixer to be mixed with acetic acid from an acetic acid tank in the mixer and then are fed into a reaction tank for reaction, a reactant from the reaction tank enters an intermediate tank to be cooled, and the reactant is fed into a centrifugal separator by the intermediate tank to be separated and then is divided into two parts; one part of sodium acetate is fed into a recovery treatment system to be further recycled, the other part of sodium acetate is a mixture of fatty acid and oil and is fed into a separation system to be further separated, and the device has the advantages of being simple in structure and high in production efficiency.

Description

technical field [0001] The invention belongs to the technical field of oil acidification, and in particular relates to a soapstock oil foot acidification reaction system and process. Background technique [0002] Soapstock is a by-product of the grain and oil processing industry, which is formed in the alkali refining and deacidification step of the oil refining section. This process uses sodium hydroxide to neutralize the free fatty acids (FFA) in the crude oil, and the generated soap absorbs some other impurities to settle and separate from the oil to form soapstock, which contains neutral oil, phospholipids, colloids, and proteins. , pigments and other impurities, the soapstock is thicker and difficult to transport, so it needs to be diluted with water. The main components of soapstock are as follows: sodium fatty acid (20-30%), neutral oil (10-15%), water (55-70%) and other impurities (1-3%). [0003] The information on the processing of soapstock is rarely mentioned i...

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Problems solved by technology

[0010] In order to overcome the problems of water environment pollution and solid waste pollution caused by the use of concentrated sulfuric acid acidification process, as well as the problem of poor product quality caused by the use of concentrated sulfuric acid, while reducing production costs and production safety risks, the present invention proposes a soapstock Oil foot acidification reaction system and process. The present invention uses acetic acid instead of sulfuric acid for acidification reaction, which can improve the treatment effect and greatly reduce environmental pollution. At the same time, the present invention uses acetic acid to carry out the acidification process of soapstock oil foot, and does not need to be processed at high temperature. The reaction is carried out under high-pressure conditions, the reaction conditions are mild and easy to achieve, the yield of the obtained product is about 45% (calculated based on 55% moisture), the solid phase is crude protein, which can be converted into organic fertilizer, and all output products can be resource The COD of the process wastewater has been determined to be 300-450mg / L, the BOD is 150-250mg / L, and the pH value is 6-7, which has basically met the national sewage discharge three-level standard and solved the long-term troubled environment of the soapstock processing industry. Contamination and Product Quality Issues

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