Electrostatic desalting and dehydration packages with an engineering focus on heavy and viscous crude, integrating vessels, high-voltage power, wash-water mixing and controls.
Crude and wash water are mixed under controlled conditions before fine droplets coalesce in the electric field and separate by gravity. Staging, drainage recycle, and bypasses are configured for the crude and unit duty.
Wash water and, when required, demulsifier are metered into the crude stream. Mixing transfers dissolved salts into the dispersed water phase before electrostatic treatment.
Water ratio, mixing intensity, and chemical dosage are selected for crude properties and outlet targets. Static mixers, control valves, and flow interlocks can be included.
The conditioned crude enters the first vessel, where a high-voltage electric field polarizes fine water droplets so they coalesce and settle, removing most free water and salts.
Electrode arrangement, field type, and operating temperature are selected for conductivity and throughput, with pressure, temperature, interface, and current monitoring.
First-stage oil passes through a second electric field for further coalescence and separation, reducing residual salt and water before downstream refining.
The staged arrangement can include parallel trains, operating bypasses, and maintenance changeover provisions. Final boundaries follow the project agreement.
Separated water is routed to recycle or downstream treatment according to quality and plant conditions, coordinating fresh-water demand with oily-wastewater load.
Drainage and recycle loops can include interface control, flow regulation, and a dedicated blowdown branch arranged around the project water system.
High-voltage power, instrumentation, valve assemblies, skid piping, and controls are integrated to monitor key variables and protect the package during abnormal conditions.
Monitoring can cover voltage, current, temperature, pressure, flow, and oil-water interface, with communication interfaces for the plant DCS or SIS.
The desalting and dehydration package combines process vessels, high-voltage power, electrode assemblies, wash-water mixing, instrumentation, valves, and controls. Each unit is matched to crude salt content, water content, throughput, and downstream feed requirements to form a complete two-stage process.
The package can be supplied as an integrated skid or in transportable modules, with drainage recycle, interface control, protective interlocks, and DCS / SIS communication for installation, commissioning, and long-term maintenance.
The package is configured around crude properties and downstream feed targets, integrating wash-water mixing, high-voltage coalescence, two-stage settling, drainage recycle, and protective controls into one continuous process. Stable control of temperature, pressure, current, and oil-water interface reduces residual salt and water through feed variation while balancing fresh-water use, oily wastewater, and maintenance changeover requirements.
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Start with the project data already available. We can identify the remaining duty and interface information. For a retrofit, include existing drawings and operating records.
