Produced Water Recovery and Disposal System
The Produced Water Recovery and Disposal System has been designed, engineered, fabricated, and field tested by HED. The commercial scale system built by HED has been proven a viable, heating, evaporation, recovery and disposal system to solve a segment of the serious economic and environmental problems created by the production of massive quantities of contaminated produced water throughout the global oil and gas production industry.
The System is not represented as a universal solution to every contaminated oilfield fluid problem. It will however make a significant contribution to the economic and environmental woes created by a segment of those problems.
It evaporates and recovers water from the contaminated produced water as distilled water. It uses a triple effect, two stage vacuum, two flash tank design, and a closed loop heating system, isolating the fluids to be processed from high temperature, direct fired, water heater. The system also recovers the total dissolved solids (TDS), predominantly Sodium Chloride, (NaCl), as 10 lb. per gal. Brine kill fluid.
The distilled water can either be used as “cutback water” reducing the raw produced water’s TDS to as low as 40,000 PPM for use as frac water for additional oilfield applications or it can be put through HED’s Force Draft Cooling Tower and evaporated into the atmosphere. The end result is a substantial reduction in the oilfield’s use of dwindling quantities of fresh water from the environment and a reduction in the wasteful disposal of a valuable natural resource by dumping it in a hole in the ground.
A unique vapor Incineration process is incorporated to environmentally dispose of volatile Hydrocarbons removed from the fluids during the vacuum evaporation step by conveying them directly to the direct-fired boiler, eliminating any toxic atmospheric emissions. Evaporation at temperatures below 180° reduce troublesome scaling tendencies in most oilfield fluids.
The System can accommodate a wide variety of heat sources from pipeline quality to Propane gasses, and any mixture in between. It can also utilize waste heat, available (above about 200F) from power generation and compressor stations.