Molecular distillation separation method for grease chemical product and equipment

Abstract

The invention discloses a molecular distillation separation method for a grease chemical product and equipment. A molecular distillation system consists of single molecular distillation equipment or multi-stage molecular distillation equipment in manners of serial connection, parallel connection or combination of serial connection and parallel connection; the multi-stage molecular distillation equipment is arranged in horizontal positions, up and down positions or combined way of horizontal positions and up and down positions; a product to be distilled is fed into the molecular distillation equipment from the top, is uniformly allocated for a first time through allocation tube holes or/and groove plates, is uniformly distributed to the upper part of a heating surface of the equipment to form a uniform film flowing from top to bottom, and is at least uniformly allocated further for a second time through an allocation groove plate or screening holes, and is uniformly distributed to the bottom from the heating surface of the equipment; under the action of heating and vacuum, a low-melting point oil chemical product is evaporated and recycled as a product of a first-class type; a high-melting point oil chemical product is fed to a next stage of molecular distillation; temperature and vacuum degrees of different stages of the molecular distillation equipment are determined according to low-melting point oil chemical products to be removed in equipment of a same stage, and various types of high-quality products can be prepared finally.

Description

technical field [0001] The invention belongs to the technical field of oleochemical products, and in particular relates to a method for distillation, purification and separation of different components of oleochemical products, other various chemical products, and plant extracts, in particular to a molecular distillation separation of oleochemical products Methods and equipment. Background technique [0002] At present, manufacturers of oleochemical products mainly use rising film and falling film evaporative distillation methods. These rising film and falling film evaporative distillation methods have several disadvantages. One is that the evaporation efficiency is not high, and the final material distillation residue is large. A material circulation pump is installed outside the distillation tower to heat the material repeatedly, so that the material produces new polymers. The third is that the evaporation and distillation time is long and the temperature is high, which ha...

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Problems solved by technology

However, there are certain limitations in this technique:

[0005] 1. The design body of the equipment has an oil cavity and a heat transfer oil cavity. The oil cavity is negative pressure, and the heat transfer oil cavity is positive pressure. If it goes into the oil cavity, the consequences will be unimaginable. At the same time, because the heating surface is not round and evenly stressed, it is also easily deformed, and the distillation and evaporation effect is not good.

[0006] 2. The oil chamber of this technology has chamber A on the top and chamber B below, which is equivalent to an oil storage tank with an oil storage function on the top and an oil storage tank with an oil storage function on the bottom. Such a main body The equipment is not scientific

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