Economic for Api Oil Water Separator

Topics: Water, Heat exchanger, Liquid Pages: 2 (678 words) Published: April 30, 2013
Labour: 3 people (8 hr. /ppl)
Installation+capital cost: $1,835,202.809
Utilities| Quality|
Electricity (pump 70 KW × 8 pumps)| 560 KW|
Service water | 224,779.5 kg/hr.|

Maintenance: $13,499 /year
The wastewater from oil refinery plant will store in the decant tank before go to the CPI oil/water separator process. Due to the condition if CPI separator needs the temperature around 50°C but the wastewater from oil refinery has temperature high to 107°C. Therefore the heat exchanger needs to present in this process. The amount of wastewater is 14,000 m3day-1 so three heat exchanges need to present for separate the flow rate. Pump will apply in each heat exchanger or other part in this process that have to transfer the wastewater. Pumps (Single state centrifugal)

The pumps that present in this process are centrifugal pump because the water contains more oil. For pump use with heat exchanger will transfer the flow rate of water about 54 L/sec (for each pump) and the area of heat exchanger calculate from the diameter 1.2 m. and long about 8 m. (according from part 2). For three heat exchanger will get Ce = 33,844.86 The pump for service water will present 3 pumps. Due to the service water will apply in the process depend on the control system or the season change so the flow rate approximately to 150 L/sec. The Ce can calculate by use the data in SINNOTT book this Ce include the cooling water and pump that use in this process. For three service water tank will get Ce = 623,042.35 The free oil pump will remove free oil and some water from CPI tan and sent it to incinerator. The flow rate of this pump will calculate from the flow rate of free oil and water that is 16 L/sec (according from mass balance in part 2). So the value of Ce = 7506.48 The sludge pump will remove sludge and some water and sent it to the dewatering process. The flow rate for this pump includes the flow rate if sludge and water that is 1.14 L/sec...
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