Oilfield sewage waste heat recycle and reclaimed water reuse method and device
A technology for oilfield sewage and waste heat recovery, applied in heating water/sewage treatment, preheating, supplementary water supply, etc. The effect of saving energy, reliable principle and simple process
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[0019] Implementation case: Taking 2000kW oilfield sewage waste heat recovery heat pump boiler combined system as an example, 90℃ oilfield sewage enters the flash tank for flash evaporation, the flow rate is 12409kg / h, and the working pressure of the flash tower is 0.02MPaa (that is, the pressure of the venturi tube injection port) , the steam pressure at the inlet of the Venturi tube is 1MPa, the flow rate is 2412kg / h, the state is wet and saturated, and the mixed outlet pressure of the Venturi tube is 0.1MPaa. The amount of flash steam is 661kg / h, and the flash evaporation rate of sewage is about 5.33%. The concentrated sewage discharged from the bottom of the flash tank is 11747kg / h and enters the sewage tank. The ejection coefficient of the Venturi tube can reach 0.274, and the heating coefficient of the system is 1.26.
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