Nigre removal process and equipment for vegetable oil and vegetable oil production process

Abstract

A nigre removal process for vegetable oil comprises the steps of introducing nigre-containing vegetable oil into a hargil filter tank (52) forming a filter cake layer (520), discharging the vegetable oil into a nigre removal oil tank after the nigre removal treatment, introducing the vegetable oil with the nigre removed into a hargil mixed reaction tank for decoloring, introducing the mixture of the hargil and the vegetable oil into a hargil filter tank (51), keeping the hargil into the hargil filter tank (51) to form a filter cake layer (510), discharging the filtered vegetable oil into a decoloring oil tank, introducing and switching the nigre-containing vegetable oil into the hargil filter tank (51) forming the filter cake layer (510) when the pressure in the hargil filter tank (52) reaches the preset threshold, and discharging the vegetable oil into the nigre removal oil tank after the nigre removal treatment. The invention further discloses nigre removal equipment and a vegetable oil production process. The nigre removal process adopts a dry method to remove nigre, so that a large amount of water resource is saved, the process of wastewater treatment is omitted, and the requirements of zero pollution and zero emission are basically met.

Description

technical field [0001] The invention relates to the field of oil refining, in particular to a dry soap removal process for vegetable oil. Background technique [0002] In the refining method of vegetable oil, there are roughly two methods of chemical refining and physical refining. The former process can be divided into degumming, alkali deacidification, decolorization, and deodorization, and the latter process can be divided into degumming, decolorization, and deodorization processes. In the chemical refining method, the degumming process is the process of removing colloids contained in crude oil, and the alkali deacidification process is the process of removing free fatty acids contained in crude oil, and soap will be produced during the neutralization reaction between adding alkali and free fatty acids The soap foot is a product, in order to ensure the quality of the vegetable oil, it is necessary to remove the soap foot from the vegetable oil. [0003] The existing soa...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a vegetable oil soap removal process, soap removal equipment, and vegetable oil production process, the main purpose of which is to overcome the existing wet soap removal methods that consume a large amount of water resources, produce waste water that pollutes the environment, and that subsequent waste water treatment is difficult advanced defects

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