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Help CenterCrude Oil Electrostatic Dehydration Tank Skid | Skid Mounted Dehydrator System Manufacturer China
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Crude Oil Dehydration Tank Skid – Detailed Product Page
1. Product Overview
The Crude Oil Dehydration Tank Skid (also known as Electrostatic Dehydrator Skid or Electric Treater Skid) is a modular final-stage separation unit engineered for oilfield surface facilities. Utilizing high-voltage AC/DC electric fields combined with thermal demulsification, it breaks persistent oil-water emulsions and reduces crude oil water cut from up to 30% down to ≤0.5% BS&W (Basic Sediment and Water), while optionally removing salts to ≤5–10 PTB—fully meeting pipeline export and refinery intake specifications.
Designed and fabricated in our Hebei production facility to ASME Section VIII Div.1 / API 12J / GB/T 150 standards, each skid integrates heating coils, chemical injection, high-voltage electrode assemblies, oil-water interface control, and PLC automation on a single structural base. With 100% shop assembly and FAT verification prior to shipment, on-site work is limited to positioning and utility connections, enabling commissioning in 3–5 days with minimal civil works.
2. Technical Specifications
Parameter |
Specification |
|---|---|
Vessel Volume |
10–200 m³ (customizable) |
Handling Capacity |
5–500 m³/h |
Inlet Water Cut |
Up to 30% (emulsified crude) |
Outlet BS&W |
≤0.5% (guaranteed) |
Outlet Salt Content |
≤5–10 PTB (desalting optional) |
Design Pressure |
0.6–3.0 MPa (as per project requirement) |
Design Temperature |
60–150°C |
Electric Field |
AC / DC / Combined AC-DC (selectable by emulsion severity) |
Electrode Type |
Cage-type / Plate-suspension |
Material |
Q345R / SS304 / SS316L (NACE MR0175 available for sour service) |
Heating System |
Heating coil / Shell & tube heat exchanger / Electric heater |
Control System |
PLC automatic control with remote monitoring & interface regulation |
Installation |
Fully skid-mounted, pre-assembled & tested |
Compliance |
ASME Sec VIII Div.1 / API 12J / GB/T 150 / NACE MR0175 |
3. System Configuration
Standard Scope of Supply
Pressure Vessel: Horizontal cylindrical dehydrator vessel with manways, nozzles, and internal distribution baffles
High-Voltage System: Transformer, control panel, and electrode assembly (AC/DC configurable)
Heating Package: Internal heating coil or external shell-and-tube exchanger
Chemical Dosing Skid: Demulsifier injection system with metering pumps
Instrumentation: Radar/magnetic level transmitter, pressure gauges, temperature sensors, sampling points
Piping & Valves: Inlet/outlet process piping, water drain valve, oil export valve, relief valves
Skid Base: Structural steel frame with lifting lugs, walkways, handrails, and anti-slip grating
Electrical & Controls: Local control panel with PLC, HMI touchscreen, explosion-proof enclosures
Optional Modules
Desalting wash water injection system
Online water-cut analyzer
Sand/jet sludge removal system
Heat tracing and insulation package
Remote SCADA/DCS integration
Third-party inspection (SGS/BV/TÜV)
4. Working Principle
Preheating: Produced fluid enters the heating section where temperature is raised to 60–80°C, reducing crude viscosity and enhancing gravity separation.
Chemical Injection: Demulsifier is injected upstream to weaken interfacial films between oil and water phases.
Electrostatic Coalescence: Fluid flows through the high-voltage electric field zone. Polarized water droplets collide and coalesce into larger drops under AC/DC field influence.
Gravity Settling: Enlarged water droplets settle to the vessel bottom by gravity; treated crude oil rises and overflows from the top collection section.
Interface Control: Continuous water drainage from the bottom and controlled oil export from the top are regulated by PLC based on real-time oil-water interface measurement.
Sludge Management: Heavy solids and sediment accumulate in the conical hopper for periodic removal.
5. Applications
Oil Gathering Stations – Final dehydration before pipeline transmission
Central Processing Facilities (CPF) – Primary dehydration node in large-scale field development
Early Production Facilities (EPF) – Rapid-deployment solution for new field startup
Modular Refineries – Crude feed pretreatment before distillation units
Offshore Platforms / FPSO – Space-saving topside dehydration replacing civil-built tanks
Heavy Oil / Bitumen Projects – Combined heating + electric field treatment for high-viscosity crudes
Mature Field Revamps – Replacement of aging treater vessels with modern skid-mounted units
EPC Turnkey Projects – Integrated supply with FWKO skids, storage tanks, and heat exchangers
6. Why Choose Us
Direct Factory in Hebei
Located in Hebei Province, approximately 2 hours from Tianjin Port, we operate in-house pressure vessel workshops, automated welding lines, NDT laboratories, and a dedicated skid integration bay. As a direct manufacturer, we eliminate trader markups and offer full transparency from design to delivery.
Certified Quality
A2 Pressure Vessel Manufacture License
ISO 9001 Quality Management System
Capability to execute projects to ASME U Stamp, API 12J, and NACE MR0175 requirements
Full material traceability and mill test certificates provided
Engineering Capability
Our technical team delivers complete documentation packages including:
Process flow diagrams (PFD) and piping & instrumentation diagrams (P&ID)
Mechanical design calculations and stress analysis reports
3D skid layout drawings and general arrangement drawings
Electrical schematics and control logic narratives
-
Operation & maintenance manuals (bilingual Chinese/English)
Fast Track Delivery
Standard lead time 45–60 days after down payment. Each unit undergoes hydrostatic testing, high-voltage insulation testing, and full PLC loop checking (FAT) prior to shipment. Video FAT records are provided for client witness when site attendance is not feasible.
Flexible Commercial Models
-
Direct Factory Supply – Competitive pricing for end users
OEM Branding – White-label manufacturing for trading companies and EPC contractors
EPC Package Integration – Coordinated supply of dehydration skids, FWKO skids, storage tanks, heat exchangers, and coupling products under a single responsibility umbrella
7. Ordering Guide
To receive an accurate proposal and quotation, please provide the following parameters:
Required Information |
Description |
|---|---|
Daily / Hourly Flow Rate |
e.g., 200 m³/d or 50 m³/h |
Inlet Water Cut |
e.g., 15% / 25% / up to 30% |
Crude Oil Properties |
Density @ 20°C, viscosity @ 50°C, pour point |
Produced Water Characteristics |
Salinity, H₂S/CO₂ content (for material selection) |
Design Pressure & Temperature |
Operating back pressure and ambient conditions |
Target Outlet BS&W |
Typically ≤0.5%, specify if different |
Desalting Requirement |
Yes/No, target salt content if required |
Power Supply |
Voltage, phase, frequency (e.g., 400V/3Ph/50Hz) |
Control Requirement |
Local PLC only / Remote SCADA / DCS integration |
Transportation Constraints |
Road width/height limits for skid dimensions |
Third-Party Inspection |
Any nominated inspector (SGS/BV/TÜV/etc.) |
Typical Quotation Turnaround: Preliminary budgetary quote within 24 hours upon receipt of above data. Formal proposal with commercial offer within 3–5 working days.
8. Contact Us
Provide your process parameters and project requirements—our engineering team will respond with a customized solution and competitive quotation within 24 hours.
Factory Direct Manufacturer in Hebei, China | Storage Tanks, Pressure Vessels & Industrial Equipment
Products: API 650 Storage Tanks, Crude Oil Storage Tanks, Diesel Storage Tanks, Chemical Storage Tanks, Pressure Vessels, Distillation Towers, Shell & Tube Heat Exchangers, and Industrial Couplings (Gear Couplings, Cardan Shaft Couplings, Diaphragm Couplings, Snake Spring Couplings, etc.).
Services: Engineering Design, Custom Manufacturing, OEM Production, Skid Integration, and EPC Project Support.
Contact: Li Fei
Mobile / WeChat: +86 15203283906
Email: 2247450686@qq.com
Send Inquiry to This Supplier
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