Design of 1,000-100,000 Liter/Hour Single-Stage Reverse Osmosis Systems for Refineries

1. Background Requirements:

Oil refineries are high water consuming industries and are used for cooling, boiler make-up, and process reactions. Because the raw water may contain suspended solids, salts, oils and organic contaminants leading to equipment fouling, corrosion and loss of efficiency. The single-stage reverse osmosis system effectively removes 97%~99% of dissolved salts and impurities through physical filtration to provide stable, high-purity water to meet the stringent water quality requirements of the oil refining process.

2. Overall Design

• Continuous and stable water production
• Water production capacity: 1-100,000 L/H
• Inlet water standard: conductivity ≤ 2000 μS/cm
• Energy-saving: Low energy consumption design with China Energy Efficiency Commission labeling
• Adaptability: Compatible with complex raw water conditions in refineries (oil, high salt, fluctuating water quality).

3. System Composition

3.1 Pre-treatment System

• Multi-media filter: remove suspended solids, rust, colloid (precision 10-20 μm).
• Activated carbon filter: adsorb oil, organic matter and residual chlorine (to protect RO membrane from oxidation).
• Water softening filter/Dosing device: reduce water hardness and prevent scaling
• Precision security filter: 5 μm filter element intercepts small particles to ensure that the feed water SDI ≤ 5.

3.2 Reverse Osmosis Host

• Membrane module: choose anti-pollution rolled composite membrane or low-pressure composite membrane. Single membrane water production 1.5m³/h, according to the site conditions combined with the realization of high efficiency capacity.
• High-pressure pump: frequency control stainless steel high-efficiency centrifugal pump (pressure 0.6 ~ 1.5 MPa)
• Desalination rate: ≥98
• Conductivity of produced water ≤50 μS/cm.
• Recovery rate: 60%~75% (adjusted according to the salinity of raw water to reduce the discharge of concentrated water).

3.3 Post-treatment System and Intelligent Control

• PH adjustment
• PLC control system for real-time monitoring of pressure, flow, conductivity, automatic flushing and alarm.
• Data remote access to support integration with refinery DCS system to achieve centralized management.

4. Daily Maintenance

• Record pressure and conductivity data daily.
• Monthly cleaning of pretreatment filter media, checking the sealing.
• Chemically clean RO membrane (citric acid + NaOH) every 3~6 months.
• Usually replace RO membrane every 3 years
• Backup pumps and membrane housings are prepared to ensure quick switchover in case of failure.

Shandong Tonglida Heavy Industry Machinery Co., Ltd. is a professional company that produces and manufactures a variety of water treatment equipment, national “high-tech enterprises”, national “an enterprise and a technology innovation enterprise”. Our company is a member of the Water Treatment Association, providing various water treatment equipment and solutions to meet the requirements of different industries. Our company has many patented technologies and soft writings of scientific and technological research results. Its the internship base of Shandong University of Science and Technology. ISO9001 quality system certification has been passed by our company.

Our company's main products are: Condensate Recovery Devices, Reverse Osmosis Equipment, Industrial Sand Filter, Fully Automatic Water Softener, Water Supply Equipment, Chemical Dosing Device, Air Compressor Heat Recovery, Water Treatment Accessories, Container Flipper, Container Loading And Unloading Machine, Truck Flipper, Electric Transfer Cart, Electric Weight-bridge, Mobile Loading Dock Ramp etc.

Our products are known for their reliable performance, easy installation, competitive pricing, and have been widely promoted and applied domestically and internationally. We undertake complete sets of water treatment engineering design, manufacturing, installation, service, training, etc.

Our mission is to lead the industry with cutting-edge water treatment technology to help our customers meet their toughest water quality challenges.

Our vision is to create a clean, safe world where future generations can enjoy pure water.

Our enterprise purpose is to "continuously improve product quality and provide excellent after-sales service." We are committed to offering advanced technology, high-quality products, reasonable prices, and satisfactory services. We sincerely look forward to cooperating with you.