Evaporating unit and solution evaporating method

Abstract

The invention relates to the technical field of solution evaporation and especially relates to an evaporating unit and a solution evaporating method. The evaporating unit comprises a stock solution flash evaporator and a six-effect evaporator set, wherein the six-effect evaporator set comprises a sixth effect evaporator, a fifth effect evaporator, a fourth effect evaporator, a third effect evaporator, a second effect evaporator and a first effect evaporator; the stock solution flash evaporator is connected with the sixth effect evaporator through a flash liquid conveying pipeline; the stock solution flash evaporator is connected with the fourth effect evaporator or the fifth effect evaporator through a secondary stock solution flash steam pipeline. The original device is forcefully reformed into the stock solution flash evaporator which is organically combined with the six-effect evaporator set, so that the stock solution temperature is reduced, the stock solution concentration is increased, the full flashing of the materials is guaranteed, the evaporation efficiency is increased, the purposes of saving energy and reducing consumption are achieved, the reforming operation for the equipment is simple, the cost is low, the evaporation steam consumption is reduced under the condition that the capacity of the evaporation unit is not influenced, the cost is saved for the enterprise and the profit is increased.

Description

technical field [0001] The invention relates to the technical field of solution evaporation, in particular to an evaporation unit and a solution evaporation method. Background technique [0002] In recent years, enterprises have paid more and more attention to production energy consumption, and equipment energy consumption has gradually decreased, especially in the alumina industry. With the continuous expansion of domestic alumina production capacity, alumina has been in a market situation of oversupply for a long time, and enterprises must continue to reduce costs and increase efficiency In order to develop stably. The steam consumption of the evaporator occupies a large proportion in the production cost of alumina, which affects the operating profit of the enterprise. [0003] In the existing technology, the evaporation unit in the alumina production process adopts the supporting mode of "six-effect evaporator + strong effect evaporator". A large amount of carbon soda i...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an evaporation unit and a method for evaporating the solution, which solves the technical problem that the irrational structure of the evaporation unit in the existing alumina production causes waste of equipment resources and increases the production cost of the enterprise

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