Shanghai Tongjie touts modular seawater desalination builds and factory testing

Shanghai Tongjie is promoting prefabricated modular seawater desalination systems as a way to cut field work, reduce commissioning risk, and speed delivery for coastal and remote projects. The company highlights factory integration, pre-shipment testing, and remote monitoring as the main advantages for buyers planning SWRO installations.

Why it matters: - Modular seawater desalination can shift complex assembly from the jobsite to a controlled factory, which can shorten schedules and reduce field defects. - For coastal utilities, island resorts, industrial camps, and remote water projects, that can mean fewer labor bottlenecks and less commissioning delay. - The approach also aims to give buyers a clearer technical baseline before equipment leaves the factory.

What happened: - Shanghai Tongjie is positioning itself as a manufacturer of modular seawater desalination systems at technical events such as CaribDA. - The company says its systems use factory prefabrication and pre-shipment testing to reduce interface risks, field welding defects, and startup delays. - Shanghai Tongjie Environmental Protection Technology Co., Ltd. offers OEM manufacturing built to customer drawings and specifications. - The company directs prospective buyers to submit raw water test data, daily volume requirements, and site interface parameters through its inquiry channel before quotation. - Shanghai Tongjie lists company social media channels on LinkedIn, Facebook, TikTok, and X.

The details: - A modular SWRO package can arrive with membrane racks, energy recovery circuits, chemical dosing skids, and central control cabinets already integrated. - The factory work can include process integration, pipe fabrication, electrical wiring, and hydraulic verification under quality controls. - Standard container formats are described as 20-foot and 40-foot enclosures, with capacities from 20 to 500 tons per day per enclosure. - Internal treatment stages can include feed booster pumps, multi-media quartz sand and anthracite filters, 5-micron cartridge housings, dosing assemblies, high-pressure pumps, spiral-wound polyamide reverse osmosis membranes in FRP vessels, CIP skids, electrical distribution panels, VFDs, and PLCs. - Layouts are designed to preserve maintenance access, including minimum operating aisles of 800 mm. - The company says those layouts allow operators to extract 40-inch membrane elements, inspect pump seals, and replace filter cartridges without unbolting adjacent piping headers. - Factory testing includes hydrostatic pressure testing at 1.25 to 1.5 times maximum rated design pressure, up to 70–80 bar. - Hydraulic flow testing checks pump curves, pressure drops, and valve seating using clean water. - Electrical and control simulations test shutdowns for low suction pressure, high discharge pressure, motor overload, and emergency stop conditions. - Formal Factory Acceptance Testing documentation is used as the release baseline before transport. - Site work still requires intake facilities, brine discharge routing, an engineered foundation, and external tie-ins for water, permeate, concentrate, and power. - The modular units are described as depending on open-sea intakes, beach wells, or coastal collector sumps that can supply the specified flow at adequate suction head. - Foundations must support 20- to 35-ton static and dynamic loads without differential settling. - Remote installations can include industrial 4G/5G or satellite IoT gateways that transmit feedwater TDS, membrane pressure, permeate conductivity, and flow rates to cloud dashboards in real time.

Between the lines: - The pitch is less about the container shell and more about moving risk out of the field and into the factory. - That matters because desalination projects often fail on integration issues, not on the core process equipment itself. - The remote monitoring angle suggests Shanghai Tongjie is also selling lifecycle support, not just hardware.

What's next: - Buyers are expected to define raw water chemistry, target capacity, power availability, container size, FAT documentation, and battery-limit responsibilities before procurement. - Shanghai Tongjie says those inputs will be used to define the modular configuration, pre-shipment test scope, and delivery schedule. - Final site commissioning would still verify performance under actual feedwater, utility power, and discharge conditions.

The bottom line: - Shanghai Tongjie is framing modular desalination as a factory-built, test-before-shipping model that can simplify installation while leaving site utilities and civil works to project owners.