Corrosion-resistant self-cleaning filters run steadily for chemical wastewater reuse

Our corrosion-resistant self-cleaning filters are tailor-made pretreatment equipment for chemical industrial wastewater recycling systems, delivering long-term stable continuous filtration under harsh acidic, alkaline, saline and organic solvent wastewater conditions. Adopting full anti-corrosion stainless steel construction and automatic online scraper/suction cleaning mechanism, the unit removes suspended solids, chemical precipitates, colloidal sludge and granular pollutants without shutdown for filter element replacement, effectively protecting subsequent RO, ultrafiltration and biochemical treatment units, and realizing high-rate wastewater recovery & zero discharge for chemical plants.

Traditional bag/cartridge filters require frequent shutdown for media replacement in chemical wastewater, bringing high labor cost, production interruption risk and waste consumables. Our self-cleaning filter cancels disposable filter media, uses reusable wedge wire screen, and supports 24/7 unattended operation, perfectly matching the continuous production rhythm of chemical factories.

2. Four Core Performance Advantages

✅Ultra-strong corrosion resistance for chemical wastewaterThe filter tank, wedge wire screen, scraper and all wetted parts adopt SS316L stainless steel as standard, with optional titanium alloy & PTFE coated structure for strong oxidizing acid, chloride-rich wastewater. All sealing components use Viton fluororubber resistant to acid, alkali and organic solvents, avoiding leakage or aging failure caused by chemical medium erosion; service life of whole machine exceeds 10 years under normal chemical wastewater working conditions.

✅Uninterrupted stable operation, no system downtimeAdopt online automatic cleaning design: when the differential pressure between inlet and outlet reaches the preset threshold or the timing cycle ends, the motor-driven scraper/negative pressure suction nozzle automatically sweeps contaminants on the inner screen and discharges sludge via the blowdown valve. The main pipeline filtration flow will not be cut off during the whole cleaning process, maintaining consistent water supply to the wastewater reuse system and eliminating production fluctuation risks.

✅Low operation & maintenance cost, no disposable consumablesThe wedge wire filter screen is integrally welded and reusable permanently, eliminating repeated procurement of filter bags/cartridges. The cleaning cycle only consumes less than 1% of total treated water, with the cleaning motor power as low as 0.37kW. Equipped with PLC intelligent control box, it supports automatic alarm for faults, remote signal transmission and linkage with wastewater reuse control system, cutting manual maintenance labor by over 80%.

✅Wide adaptability to complex chemical wastewater working conditionsCustomizable filtration precision from 10μm to 3000μm, covering light organic wastewater, heavy metal precipitated wastewater, electroplating pickling wastewater, printing & dyeing alkaline wastewater, pesticide chemical sewage, etc. Support flow customization of 10–500 m³/h, DN50–DN600 flange interface, vertical/horizontal installation to adapt limited chemical workshop space.

3. Four Standard Technical Specifications for Chemical Wastewater Scenarios

✅Anti-corrosion material matching rules

• Weak acid/alkali, low chloride wastewater: Standard SS316L tank + SS316L wedge wire screen + Viton sealing

• Strong acid, chloride, high-salinity wastewater: Titanium alloy screen / PTFE lined tank + full PTFE sealing

• High-temperature chemical wastewater (≤120℃): High-temperature resistant fluororubber & reinforced drive shaft structure

✅Intelligent dual-trigger automatic cleaning control systemDual startup modes: differential pressure trigger (0.03–0.1MPa adjustable) + timing trigger (1–24h freely set). Equipped with LCD touch screen, real-time display of inlet/outlet pressure, cleaning records, fault codes; optional Modbus/BACnet communication protocol for centralized industrial control room monitoring.

✅Stable operating parameter rangeDesign pressure: 0.1–1.6MPa; working temperature: 5–80℃ (high temp customized up to 120℃); allowable influent TSS: ≤5000mg/L; blowdown duration: 5–30s adjustable, low backwash water consumption rate.

✅Complete export compliance certificationPass ISO9001 quality management, CE mechanical safety certification; provide material corrosion resistance test report, hydraulic pressure test report, factory operation manual, supporting chemical plant overseas project bidding and customs clearance documents.

4. Target Application Scope (Chemical Wastewater Reuse Scenarios)

Fine chemical & pharmaceutical factory wastewater pretreatment: Remove drug residues, fermentation sludge and chemical precipitates before UF/RO recycling

Electroplating & surface treatment industry: Intercept heavy metal hydroxide sludge, protect membrane system for nickel, copper, chromium wastewater recovery

Printing & dyeing textile chemical plant: Filter dye flocculants, fiber suspended solids for printing wastewater cyclic reuse

Pesticide, fertilizer inorganic chemical factory: Treat acidic ammonia nitrogen wastewater, reduce turbidity of recycled process water

Petrochemical & coating workshop: Separate oil sludge, paint particles from circulating washing wastewater

Comprehensive industrial park centralized wastewater recycling station: Large-flow multi-unit combined filtration for mixed acid-base sewage