As a professional supplier of industrial liquid filtration solutions centered on Liquid Filters, we develop dedicated high rejection RO elements customized for power station boiler makeup water treatment. This industrial spiral wound product is defined as professional RO membrane for power plant, specifically engineered to satisfy ultra-strict water purity requirements of subcritical, supercritical and combined-cycle power generating units.
As a professional supplier of industrial liquid filtration solutions centered on Liquid Filters, we develop dedicated high rejection RO elements customized for power station boiler makeup water treatment. This industrial spiral wound product is defined as professional RO membrane for power plant, specifically engineered to satisfy ultra-strict water purity requirements of subcritical, supercritical and combined-cycle power generating units.
Boiler feed water requires extremely low concentrations of dissolved salts, silica, sodium and chloride ions. Trace mineral impurities will trigger scaling on boiler tubes and corrosion of turbine blades, leading to unplanned unit shutdowns and substantial economic losses. This element adopts optimized polyamide separation layer structure to deliver consistent deep desalination effect, maintaining stable low permeate TDS under long continuous operation and fully matching the rigorous water quality standards of power plant boiler systems.
Adopting universal spiral wound dimensional specifications, it matches all mainstream industrial pressure vessels and supports direct replacement of old membrane elements on existing boiler water treatment lines without large-scale pipeline and pump reconstruction. It has become the core pre-desalination component of full-process boiler feed water systems across thermal power, gas-fired power and waste heat power plants.
The separation mechanism complies with standard solution-diffusion theory rather than simple physical screening. Dense cross-linked polyamide active layer acts as a selective barrier: water molecules dissolve and diffuse through the membrane matrix under driving pressure, while dissolved monovalent and divalent salt ions are repelled via Donnan electrostatic exclusion effect.
Compared with general industrial RO membrane, this power plant dedicated element upgrades surface charge density and tightens molecular arrangement of the separation layer, greatly lowering ion penetration rate to achieve certified high salt rejection under steady long-term operation. Meanwhile, wide streamline feed spacers eliminate internal flow dead zones and suppress concentration polarization, avoiding gradual performance decay caused by local pollutant accumulation during round-the-clock power station service.
Equipped with a smooth hydrophilic membrane surface, it slows the adhesion of calcium-magnesium scale precursors and tiny colloids from raw water. Under our standardized chemical cleaning scheme (pH 1–13, temperature ≤35°C, single cleaning cycle ≤2 hours), its salt rejection and permeate flux can recover to over 96% of factory calibrated value, retaining stable deep purification capacity for boiler feed water over extended service cycles.
All indicators below are certified test values under standardized reference conditions, providing complete technical data support for power plant boiler feed water system design:
Product Positioning: High rejection RO membrane for power plant boiler feed water
Structural Type: Spiral wound industrial RO membrane element
Standard Test Condition: 25°C, 225 psi, 2000 ppm simulated brackish feed water
Stabilized Salt Rejection Rate: ≥99.3%
Silica Rejection Rate: ≥98.5%
Rated Permeate Flux (8040 specification): 8500–10200 GPD
Continuous Operating Pressure Range: 110–160 psi
Maximum Continuous Operating Temperature: ≤45°C
Long-Term Stable pH Range: 2.0–11.0
Short-Term Chemical Cleaning pH Limit: 1.0–13.0
Maximum Allowable Feed SDI: ≤3
Single Element Pressure Drop: ≤14 psig
Flux and salt rejection data are calibrated at 25°C standard temperature; permeate flux drops roughly 3% per 1°C temperature reduction, salt rejection slightly decreases under high water temperature. Temperature correction factors must be applied for engineering calculation.
Stable ≥99.0% salt rejection and ≥98.0% silica rejection can be guaranteed within operating temperature 15–45°C and feed SDI ≤3.
Long-cycle high rejection performance is premised on complete removal of free chlorine in pretreatment system to prevent irreversible oxidation damage to polyamide layer.
Ultra-stable high salt & silica rejection reduces post-treatment load
The certified ≥99.3% salt rejection and ≥98.5% silica rejection realize deep interception of dissolved minerals in one separation stage, significantly lowering permeate TDS and silica content. It cuts the operation load of downstream mixed bed or EDI polishing equipment, reducing regeneration frequency of ion exchange resin and consumption of acid & alkali chemicals, which effectively controls overall water treatment operating expenditure for power stations. High silica removal avoids hard silicate scale forming on high-temperature boiler pipes and turbine blades, eliminating costly shutdown maintenance caused by silica fouling.
Optimized flow channel adapts to 24/7 uninterrupted power station operation
The wide anti-concentration-polarization feed spacer design maintains consistent separation performance during non-stop running. Compared with our previous generation industrial RO membrane with a standard 90-day cleaning cycle, this model extends routine chemical maintenance intervals to 110–115 days, cutting system shutdown frequency and improving power generation unit availability.
Universal industrial specification cuts equipment renovation investment
Standard spiral wound size is fully compatible with mainstream pressure vessels on the market. When aging membrane elements need replacement, on-site upgrade can be completed without pipeline or pump reconstruction, shortening construction cycle and lowering transformation costs for power plant water workshops.
Optimized surface modification extends overall RO membrane lifespan
The anti-scaling hydrophilic layer delivers excellent cleaning recovery performance under standardized maintenance, sustaining qualified salt and silica rejection indicators for longer service cycles and reducing annual membrane replacement volume for power generation facilities.
Relying on consistent high salt and silica rejection tailored to boiler feed water standards, this industrial RO membrane is widely deployed in all types of power generation facilities. All design and performance indicators conform to GB/T 12145 and DL/T 912 power industry standards for water treatment systems.
Thermal power plants (subcritical / supercritical units): Core pre-desalination component for large-volume boiler makeup water, restricting mineral content to protect high-temperature boiler and turbine equipment.
Combined-cycle gas power stations: Compact RO system matching modular boiler water treatment, stabilizing water quality under fluctuating raw water TDS.
Waste heat & biomass power plants: Adaptable to complex local surface and groundwater sources, simplifying pretreatment layout while meeting strict boiler water purity criteria.
Cogeneration industrial power stations: Segmented membrane layout supports simultaneous supply of qualified boiler feed water and factory process purified water.
For power plant water treatment engineers and EPC designers, complete salt rejection, silica rejection, flux and temperature correction test data provide reliable basis for membrane quantity, high-pressure pump and pretreatment system sizing, supporting standardized design of low-maintenance boiler feed water RO systems compliant with national power industry specifications.
Every batch of power plant high rejection RO membrane undergoes simulated boiler feed water full performance testing before delivery, with serial-numbered inspection reports recording salt rejection, silica rejection, flux, pressure drop and cleaning recovery indicators. Full production flow follows ISO 9001 quality management system, all water-contact raw materials satisfy industrial boiler water safety specifications, and core rejection indicators pass third-party power water treatment certification.
Complete datasheets with temperature correction curves, cleaning operation guidelines and batch traceability documents are delivered together for project tender filing, engineering design and plant acceptance inspection. Finished elements are vacuum sealed with dedicated anti-drying preservation liquid to avoid separation layer damage during transit and storage, ensuring on-site installation performance consistent with factory certified high rejection benchmarks under qualified pretreatment conditions.
Our R&D team continues to optimize the polyamide separation layer compactness and surface anti-scaling modification for this boiler feed water element. Ongoing formulation improvements target further stabilization of long-cycle salt & silica rejection and enhanced tolerance to raw water quality fluctuations — reinforcing the low-maintenance, long-life performance that power plant water systems require. Future generations will build on this proven platform to deliver even greater operational economy.
This industrial spiral wound RO membrane for power plant takes certified high salt and silica rejection as core technical advantage, specially developed to satisfy ultra-purity requirements of power station boiler feed water. Through compact optimized polyamide separation layer and wide anti-polarization feed spacer design, it realizes deep interception of dissolved salts, silica and colloids under 24-hour continuous power plant operation.
Compared with conventional industrial RO elements, this boiler-dedicated membrane delivers steady long-term separation performance, effectively reducing post-treatment chemical consumption and maintenance downtime, bringing stable water quality guarantee and long-term operation cost reduction for power plant water workshops. For power EPC companies, power station operation and maintenance teams and water treatment design institutes pursuing consistent low-TDS, low-silica boiler makeup water, it is a reliable high-performance industrial RO element solution.
Q1: What is the core advantage of this high rejection membrane over general industrial RO membrane for power plants?
A1: It adopts tighter modified polyamide separation layer to achieve ≥99.3% salt rejection and ≥98.5% silica rejection, greatly lowering permeate mineral content. It reduces regeneration frequency of downstream ion exchange equipment and extends chemical cleaning intervals, perfectly fitting the 24-hour continuous operation mode of power generation units.
Q2: Can this element replace existing 8040 RO membrane on the original boiler water system?
A2: Yes, it adopts universal industrial spiral wound size matching mainstream pressure vessels. Minor adjustment of operating pressure after replacement can restore certified high rejection flux performance; temperature correction coefficients should be adopted for long-term design calculation.
Q3: What pretreatment indexes must be controlled to sustain long-term high rejection performance?
A3: Feed water SDI shall be stably controlled below 3, all free chlorine must be neutralized via activated carbon or reducing agent, and softening equipment shall be configured for high-hardness raw water to prevent irreversible scaling damage to the separation layer. Operating temperature shall never exceed 45°C to avoid permanent membrane deterioration.
Q4: Is this power plant dedicated membrane suitable for seawater desalination projects?
A4: This element is optimized for brackish raw water boiler feed water scenarios. For high-salinity seawater desalination, dedicated seawater RO membrane series with high pressure resistance are recommended.
Get a FREE Quote
RELATED PRODUCTS
Leave a message
If you want to get more details about filter and filtration equipment, you can send E-mail to filter01@lefilter.com. You can consult our professional engineer and specialized sales team with leave a message in below form. We will contact with you ASAP. You also can visit our factory in Henan China.