Circulating dephenolizing device and circulating dephenolizing process for producing cottonseed protein by virtue of extraction method

Abstract

The invention relates to a circulating dephenolizing device and a circulating dephenolizing process for producing cottonseed protein by virtue of an extraction method. The device comprises a multistage spray extraction extractor, a precipitation type liquid separating tank, a rectifying tower, a condenser, a methanol mother liquor tank and a mother liquor pipe, wherein an external circulation circuit is arranged between the extractor and the liquid separating tank; an extract liquor recycling pipeline with a regulating valve is arranged between the upper part of a first-stage funnel tank of the extractor and the liquid separating tank; a methanol backflow pipeline is arranged between the lower part of the liquid separating tank and a back spray pipe at the upper part of the first stage of the extractor; a rectifying circuit is arranged between the methanol backflow pipeline and the mother liquor tank. The dephenolizing process comprises the steps of solvent extraction, methanol extraction dephenolization and methanol recycling, wherein the dephenolizing methanol solution coming out of the extractor is subjected to liquid separation via the precipitation type liquid separating tank; the organic solution at the upper part is returned to the extraction work section, a part of the methanol phenol-containing mixed liquor at the lower part returns to the extraction dephenolizing work section to be recycled and the other part of the mixed liquor is rectified, dephenolized and condensed to obtain liquid methanol so as to be recycled. In the dephenoling work section, the energy consumption is saved by 30% and the methanol is saved by above 10%.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a device and a process for producing cottonseed protein by an extraction method, in particular to a circulation dephenolization device and a process for producing cottonseed protein by an extraction method. Background technique [0002] In cottonseed processing, organic solvent is used to extract oil, and then methanol is used to remove gossypol to obtain feed grade cotton protein. Because it is a low-temperature extraction process, it can ensure that the cotton protein will not be denatured due to high temperature and overheating during the production process. At present, this production method has replaced the traditional hot pressing process as a conventional production method, which can not only obtain cottonseed oil, but also obtain high-quality feed protein. [0003] In the above-mentioned extraction production process, in order to save costs, it is necessary to recycle the ...

AI Technical Summary

Problems solved by technology

Although this process can realize the recycling of the extraction medium, the methanol distillation and reboiling loads are large, and a large amount of heat energy is consumed.

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