Scope of Application

This device is primarily designed for the evaporation and crystallization of solutions with precipitated crystals, widely used in the chemical industry, metallurgical processing of metal mines, acid pickling waste liquids from large steel mills, and wet flue gas desulfurization waste liquid treatment from power plants (including sodium chloride, phenylacetic acid, sodium sulfate, ammonium chloride, glycine; barium chloride, zinc sulfate, calcium chloride, ammonium sulfate, sodium hydroxide).

In light of the unique and complex characteristics of various factory solutions, our company will provide specific technical solutions for the composition and concentration of the solutions with crystalline precipitation that our customers provide, for their reference and selection!

Equipment Composition

This unit is composed of a heater, a forced circulation pump, an evaporator separator, a crystallizer, a condenser, various material pumps, a condensate water pump, a vacuum pump, an operation platform, an electrical and instrument control cabinet, and pipeline valves within the unit.

Working Principle

The liquid is heated by steam outside the heat exchanger tubes in the heater, causing the temperature to rise. Under the action of the circulating pump, the material rises to the evaporative separator, where it evaporates due to the decrease in static pressure. The evaporated material, forming secondary steam, overflows from the liquid, concentrating the material and leading to supersaturation, which promotes crystal growth. The supersaturated material enters the forced circulation pump and, under the pump's action, is transferred to the heat exchanger. This cycle of evaporation and crystallization continues, achieving separation between substances and purifying chemical substances to obtain chemical products.

Key Features:

Based on the characteristics of the material and the evaporation volume, the unit can be designed as a single-effect or multi-effect evaporator system.

The unique crystallizer design meets the 0-process requirements for continuous feeding and discharging, with the evaporator's forced circulation forming a good match. Its internal structure effectively facilitates rapid separation of crystals and clear liquid.

The entire process is carried out under vacuum conditions, with relatively low temperatures and rapid evaporation rates. The evaporation consumes less energy, results in higher concentration, and facilitates the flow and evaporation of thick, viscous liquids, making scaling less likely.