China Singspring Desalination Plant Factories & Factory Solutions

To provide an accurate technical projection and commercial offer, our engineering department requires: 1. A comprehensive raw water laboratory analysis including Total Dissolved Solids (TDS), electrical conductivity, pH, temperature range, silt density index (SDI), turbidity, total organic carbon (TOC), silica, and heavy metal concentrations. 2. Required permeate output volume (m³/day or GPD) and target water quality (e.g., WHO drinking water guidelines, boiler feed conductivity <0.1 μS/cm, or irrigation limits). 3. Site conditions including power grid voltage/frequency, intake structure type (open beach intake, deep sea subsea line, or beach well), brine disposal restrictions, and physical layout preferences (containerized ISO freight vs. skid-mounted building layout).

High-pressure reject brine in seawater RO retains up to 98% of the hydraulic pressure imparted by the high-pressure pump. Our Singspring plants utilize isobaric chamber energy recovery devices (such as ERI PX or Danfoss iSave). These devices transfer pressure directly from the reject stream to the incoming raw seawater feed with over 96% mechanical efficiency, reducing high-pressure pump sizing and slashing electrical energy consumption down to approximately 2.8 – 3.2 kWh per cubic meter of clean permeate produced.

High-salinity seawater with high dissolved oxygen poses extreme pitting and crevice corrosion hazards. Shanghai Tongjie specifies 2507 Super Duplex Stainless Steel (UNS S32750) or 2205 Duplex for all high-pressure manifolds, pump wetted parts, and high-pressure flex couplings. Low-pressure piping sections utilize corrosion-proof UPVC, CPVC, or industrial GFRP. Pressure vessels are constructed from high-tensile filament wound fiberglass rated up to 1,000 to 1,200 PSI.

Because our containerized plants are fully assembled, pre-piped, wired, and tested in our Shanghai factory under simulated load conditions, civil preparation on site requires only a reinforced concrete foundation pad, raw water intake connection, brine discharge drain, product water storage hookup, and main power tie-in. Once unloaded on-site, a standard 500 to 2,000 m³/day containerized plant can produce certified fresh water within 5 to 15 days of arrival.

With standard pre-treatment operation (maintaining feed SDI < 3 and proper antiscalant/biocide dosing), top-tier polyamide thin-film composite SWRO membranes (DuPont, Hydranautics, Toray) deliver a normal service life of 3 to 5 years before chemical rejuvenation or replacement is warranted. High-pressure pumps and isobaric ERD devices possess a design life exceeding 15 to 20 years with routine mechanical seal and bearing servicing according to our O&M protocols.

Yes. Beyond standard seawater desalination, our specialized high-pressure DTRO (Disc Tube Reverse Osmosis) and STRO (Spacer Tube RO) configurations are engineered specifically for high fouling, high COD, and high mineral scalants common in oil and gas fracturing flowback, landfill leachate, and chemical park effluents. With operating pressures up to 120 bar and open-channel fluid dynamics that prevent particulate trapping, these systems achieve over 75% to 85% water recovery in Zero Liquid Discharge (ZLD) concentrations.

Shanghai Tongjie Environmental Protection Technology Co., Ltd. holds full European CE Machinery and Pressure Equipment Directives certification, ISO 9001 (Quality Management), ISO 14001 (Environmental Management), and ISO 45001 (Occupational Health and Safety). We are accredited as a National High-Tech Enterprise and Shanghai Specialized & Sophisticated Enterprise, holding Class II contracting licenses for environmental and mechanical/electrical engineering with over 38 independent invention patents.

Yes. A significant portion of our Shanghai factory output consists of custom OEM/ODM production for international water treatment conglomerates, regional EPC contractors, and brand distributors. We offer customized skid frames, bespoke container exterior color schemes, private labeling, localized language HMI interfaces, and dedicated documentation packages matching the client’s corporate branding.

For open-sea intakes vulnerable to biological blooms, Singspring systems integrate multi-barrier pre-treatment including coagulation dosing, Dissolved Air Flotation (DAF), automatic backwashing media filtration, and pressurized hollow-fiber ultrafiltration (UF) modules. In addition, shock chlorination / dechlorination dosing skids and automated hot-water / chemical Clean-in-Place (CIP) systems are pre-programmed into the PLC for swift bio-film eradication.

We provide comprehensive lifecycle support via our Global Service program. Every plant ships with an essential 1-year operational consumable kit (cartridge filters, O-rings, calibration buffer solutions, sensor probes). Critical spare parts are stocked in Shanghai for priority courier dispatch within 48 hours. Furthermore, our remote telemetry diagnostics allows our senior technical specialists to review plant logs, diagnose hydraulic anomalies, and optimize operational settings collaboratively with your on-site team.