Crude Oil Tank Water Cut Treatment Technology in Refining

In the production units and oil storage areas of the petroleum and petrochemical industries, crude oil water cut treatment is a necessary operation. Since oil (or liquefied gas) usually contains a small amount of water, this water will accumulate at the bottom of the storage container to form stagnant water. To avoid the impact of water on the quality and storage safety of oil products, water cut treatment is required, that is, draining the stagnant water in the container. However, traditional crude oil tank farm water cut treatment technologies, such as sedimentation, cyclone, and membrane types, have the following problems: - Difficult to completely separate: Crude oil and water are mixed very closely in the oil tank. If not properly treated, some moisture and impurities may remain, which will directly affect the quality of the oil product. - High treatment cost: Traditional technologies require a large amount of energy and chemical agents to achieve separation, which increases the treatment cost. - High safety risk: If the water separation treatment in the oil tank is not timely or thorough, it may lead to unstable pressure and temperature in the oil tank, and may even cause an oil tank explosion accident. - Environmental pollution: The wastewater generated during the treatment process may contain harmful substances such as grease and heavy metals. If not properly treated, it may cause serious harm to the environment. To solve the problems of traditional technologies, a new crude oil tank farm water cut treatment process has been developed. This process adopts a pure physical technology without adding chemical agents, and realizes demulsification and oil-water separation through patented equipment such as "coalescing oil-water separator + CDFU cyclone dissolved air flotation", thus better solving the problem of crude oil tank farm water cut treatment.

Process Flow Diagram of Water Cut Treatment in Oil Depot Tank Farm

The process flow is as follows: The oily wastewater from each tank farm is collected in the oily wastewater collection tank through the pump lifting of the decontamination oil tank, and then enters the tank farm water cut buffer tank. The water in the buffer tank enters the coalescing oil remover for treatment, and the treated water then enters the CDFU (cyclone dissolved air flotation) for further treatment. The treated water is discharged to the sewage treatment plant, and the separated oil is recycled or disposed of properly. The nitrogen gas generated during the process is sent to the waste gas treatment system.

Advantages of the Process- Good separation effect: Adopting pure physical technology without adding chemical agents, and realizing demulsification and oil-water separation through patented equipment, with good separation effect and complete separation of oil and water. - Low treatment cost: Does not require a large amount of energy and chemical agents, and the treatment cost is low. - High safety: Good separation effect can avoid unstable pressure and temperature in the oil tank and reduce safety risks. - Good environmental protection: Does not require the use of chemical agents, and the wastewater generated during the treatment process does not contain harmful substances such as grease and heavy metals, and has no pollution to the environment. - Automation: Automated, simple operation and maintenance, short construction period, and can be implemented online. - Strong impact resistance: Strong impact resistance, stable operation, and can withstand large water quality fluctuations. - Small footprint: Equipment skid-mounted, short process flow, compact equipment structure, and small footprint.

A Petrochemical Enterprise Oil Depot Water Cut Treatment Site

Crude oil water cut is an inevitable operation in the petroleum and petrochemical industries, but traditional treatment technologies have problems such as incomplete separation, high cost, high safety risks, and environmental pollution. Now, the crude oil tank farm water cut treatment process with the coalescing oil remover and CDFU as the core adopts pure physical technology without adding chemical agents, and realizes demulsification and oil-water separation through patented equipment, thus better solving these problems. The emergence of this new technology will bring better solutions to the crude oil water cut operation in the production units and oil storage areas of the petroleum and petrochemical industries.