Switchable salt solution multi-effect concentration and evaporation system and effect reduction operation method thereof

Abstract

The invention relates to a switchable salt solution multi-effect concentration and evaporation system and an effect reduction operation method thereof, and provides the switchable salt solution multi-effect concentration and evaporation system and the effect reduction operation method, the effect reduction operation can be carried out once a certain effect is blocked, and meanwhile, a rapid matching method of operation parameters after effect reduction is provided. The temperature and pressure of evaporation operation are rapidly matched, the evaporation capacity of each effect evaporator and the steam heat source supply amount of an evaporation system are rapidly adjusted, and therefore continuous production operation is achieved, the operation flexibility is high, the device runs rapidly to reach the stable state, the product performance is kept stable, the maintenance workload and maintenance cost of the device are reduced, and the production efficiency is improved. And the economic benefit is improved.

Description

technical field [0001] The invention relates to the technical field of multi-effect evaporation and concentration, in particular to a switchable salt solution multi-effect concentration and evaporation system and an efficiency reduction operation method thereof. Background technique [0002] The salt solution concentration and evaporation system generally has the problem of easy clogging. Once the clogging affects the continuity of production, it not only causes economic losses, but also makes subsequent maintenance and treatment difficult. [0003] The previous application with the publication number CN 203108242U discloses a two-effect evaporation system for ammonium sulfate concentration, including an evaporator for concentrating the ammonium sulfate solution from the acrylonitrile unit, and a circulation pump for driving the circulation of the ammonium sulfate solution , a steam heater for heating the heating medium in the evaporator, a condenser for condensing the steam...

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned existing patents or patent applications disclose the process of concentrating and evaporating a salt solution or a certain kind of saline solution—ammonium sulfate solution. During the process of concentrating and evaporating the solution, there is a common problem that it is not easy to maintain after being blocked.

Although CN104162285B provides a solution, it lacks flexibility for the scheme of simultaneously stringing steam and feed liquid to each effect evaporator. For example, the evaporation system includes four evaporators. When the third effect is blocked, the efficiency must be reduced Up to two-effect operation, and the operation stability of the device is difficult to guarantee

Images