Reverse evaporating and concentrating system for molasses alcohol waste liquid

Abstract

The invention provides a reverse evaporating and concentrating system for molasses alcohol waste liquid. The flowing direction of a material is as follows in sequence: a V-effect evaporator, a IV-effect evaporator, a III-effect evaporator, a II-effect evaporator and a I-effect evaporator; low-concentration alcohol waste liquid at about 80 DEG C from a distillery enters the V-effect evaporator, and is pumped into the IV-effect evaporator and the III-effect evaporator in sequence; after medium-concentration alcohol waste liquid from the III-effect evaporator is heated to 95 DEG C or above through a first heater, the medium-concentration alcohol waste liquid precipitates and is clarified in a clarifying pond, then is heated to 105 DEG C through a second heater and a third heater, enters the I-effect evaporator, and then enters the II-effect evaporator. According to the reverse evaporating and concentrating system for the molasses alcohol waste liquid, the using amount of primary steam in alcohol production is reduced by utilizing an energy-saving transformation technical method of using secondary steam generated by multiple-effect evaporation of the waste liquid in alcohol distillation, so that the energy consumption of the alcohol production is reduced, and the production operation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of molasses alcohol waste liquid treatment devices, and more specifically relates to a reverse evaporation concentration system for molasses alcohol waste liquid. Background technique [0002] At present, molasses, the main by-product of Guangxi Sugar Factory, is mainly used as a raw material for the production of industrial alcohol. High energy consumption is an urgent problem faced by molasses alcohol production. With the improvement of national standards for energy conservation and consumption reduction in industrial production, the issue of energy conservation has become increasingly important to alcohol production enterprises. In order to comply with the requirements of the national energy-saving policy and to reduce the cost of production and operation, the research on the method of energy-saving transformation of alcohol distillation to reduce the energy consumption of alcohol production has become a...

AI Technical Summary

Problems solved by technology

Although this method can effectively treat alcohol waste liquid, it needs to consume a large amount of primary steam as a heat source for evaporation and concentration, which has problems such as high energy consumption and high operating costs.

[0004] The main reason for the high energy consumption in the production of molasses alcohol is that the evaporation and concentration of alcohol waste liquid requires a lot of heat. The secondary steam generated in the evaporation has no other use and enters the condenser to condense, resulting in a large loss of waste heat. In addition, the secondary steam needs to be cooled. Water cooling, consumes a lot of cooling water

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