A continuous multi-stage cooling and dewaxing method and system for grease

Abstract

The invention discloses a method and a system for continuous multistage cooling and dewaxing of oil. The method comprises the following steps that: A, a predetermined ratio of a filter aid is added into corn oil and the corn oil and the filter aid are mixed uniformly; B, the corn oil uniformly mixed with the filter aid successively enter a plurality of crystallizing tanks in a one-by-one overflowing manner for cooling and crystal growing step by step; and C, the corn oil with grown crystals in the plurality of crystallizing tanks is filtered and dewaxed, so dewaxing is completed. According to the method and the system for continuous multistage cooling and dewaxing of oil provided by the invention, step-by-step cooling and crystal growing and better control of the crystallization rate are realized through arrangement of the plurality of crystallizing tanks and usage of the one-by-one overflowing manner, and formed crystal particles are big; a fast filtration speed is obtained by filtering the corn oil one tank after another tank, so production efficiency is improved and continuous production is realized; moreover, arrangement of an automatic filter aid adding device enables the filter aid and the oil to be accurately proportioned and stability of product quality to be ensured.

Description

technical field [0001] The invention relates to the technical field of oil processing, in particular to a continuous multi-stage cooling and dewaxing method and system for oil. Background technique [0002] During the production of corn oil, the neutralized corn oil is dewaxed to remove the wax contained therein. [0003] The current process is carried out according to the following steps: the neutralized corn oil is rapidly cooled from 35°C to 8°C through a plate heat exchanger, pumped into a single crystallization tank and cooled and grown in it, and at the same time, the amount of oil is manually added 0.5 % of the filter aid is used as a crystal aid. After the corn oil is kept at 6°C for 8 hours for crystal growth, it is filtered to complete dewaxing. [0004] Due to the rapid cooling of the above process, the crystal grains are too fine, and the fine grains are difficult to filter, and the filtration speed is slow, and the production efficiency is low. In addition, man...

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a continuous multi-stage cooling dewaxing method and system for oil, aiming to solve the problems of slow filtration speed, low production efficiency and unstable product quality in the current oil dewaxing process. question

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