Concentrating evaporators – Processes – Involving waste liquid
Patent
1989-01-18
1989-10-10
Manoharan, Virginia
Concentrating evaporators
Processes
Involving waste liquid
34183, 34185, 34203, 159 261, 159DIG10, 159DIG32, 175 66, 175206, 202176, 202202, 202235, 203 14, 203 22, 203 74, 203 81, 203DIG8, B01D 104, E21B 2106, F26B 1100
Patent
active
048729493
ABSTRACT:
Used drilling muds containing substantial quantities of organic liquids and water-soluble salts are treated to render them environmentally acceptable for disposal purposes, by drying the muds to evaporate all liquids, aqueous and non-aqueous, preferably in a shell-and-tube type heat exchanger through which they are conveyed and held in suspension by screw conveyors, and preferably with the vapors thus generated flowing in a direction counter-current to the mud. Water-soluble salts are removed from the dried mud components by dissolving with water, and the vapors are condensed and phase separated for further purification and re-use if desired.
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