Method for evaporating process wastewater

Details Method for evaporating process wastewater Method for evaporating process wastewater

1996-06-10

1998-08-11

Yoon, Tae

Concentrating evaporators

Processes

Involving waste liquid

210639, 210697, 210710, 48197A, B01D 126, C23F 1402

Patent

active

057923132

ABSTRACT:
In the evaporation of process wastewater comprising a mixture of different types of wastewater, problems arise due to the formation of reaction products, so-called incrustations, which are difficult to separate. These incrustations clog up the evaporator, thus necessitating frequent stoppages for chemical and mechanical cleaning of the evaporator. The invention concerns an improved method for concentrating process wastewater by evaporation. In this method, one acid process flow and one alkaline process flow are evaporated alternately in one and the same evaporator. With this method, precipitates that are difficult to separate are dissolved in the evaporator during the respective evaporations. As a result, stoppages motivated by the need to clean the evaporator may be avoided to the utmost possible extent, while less and cheaper processing equipment is required.

REFERENCES:
patent: 4800042 (1989-01-01), Kurumada et al.

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