Fully Automatic Self Cleaning Filter Mesh Screen for Metallurgy Casting Cooling Water

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Automatic Self Cleaning Filter, Fully Automatic Filter, Mesh Screen Filter, Metallurgy Water Filter, Continuous Casting Water Filter, Industrial Water Filter, Self Cleaning Filter, Mesh Filter Screen, Automatic Backwash Filter, Metallurgy Filtration Equipment.

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Product Description

Product Introduction

The fully automatic self cleaning filter is an online filtration system designed for metallurgy casting cooling water, especially continuous casting mold cooling water, secondary cooling water and high pressure descaling water. It removes iron oxide scale, slag fines, sand and suspended solids from the circulating water, protecting the mold copper plates, spray nozzles, heat exchangers and pumps from clogging and abrasive wear.

Water enters the vessel and passes through a stainless steel mesh screen filter element from inside to outside. Contaminants are retained on the inner screen surface while clean water leaves through the outlet. When the differential pressure reaches the set value (normally 0.05 - 0.1 MPa), or when the preset time interval is reached, the PLC starts the cleaning cycle automatically: the motor drives a rotating brush or suction scanner across the screen, the electric drain valve opens, and the collected debris is flushed out within 10 - 60 seconds. The main flow is never interrupted, so the casting line keeps running with no shutdown and no bypass line.

Working Principle

1. Filtration: Raw cooling water enters the inlet, flows through the wedge wire / mesh screen, and impurities are trapped on the inner surface.
2. Trigger: A differential pressure transmitter monitors the screen. At the set ΔP (0.05 - 0.1 MPa), or at the preset timer, the PLC starts the cleaning program.
3. Automatic backwash: The motor drives the brush or suction scanner while the drain valve opens; clean water back-flushes the screen and discharges the debris with only 0.5% - 1% of the flow.
4. Reset: Once ΔP drops back to normal, the valve closes and the unit returns to filtration automatically, with fault alarm and motor overload protection.

Features of the Automatic Self Cleaning Filter

• Continuous online filtration with automatic backwash — no shutdown, no bypass, no manual screen cleaning.
• PLC control with differential pressure + timer + manual triple trigger; parameters adjustable on site.
• Low backwash water consumption (0.5% - 1%) and short cleaning cycle (10 - 60 s) for energy and water saving.
• Wedge wire screen with V-shaped profile wire resists clogging by hard iron oxide scale and allows thorough cleaning.
• High dirt holding capacity and large filtration area for high flow rates up to 1500 m³/h per unit.
• Optional brush type, suction scanner type or scraper type cleaning to match different impurity conditions.
• Modular vertical / horizontal / multi-column design, easy installation and maintenance with standard flanges.
• Motor overload protection, fault alarm and remote signal output for unattended operation.

Applications

• Continuous casting mold cooling water and secondary cooling water filtration
• High pressure descaling water and rolling mill cooling water in steel plants
• Clean and turbid circulating water systems of blast furnaces and sintering plants
• Power plant cooling tower and generator cooling water
• Petrochemical circulating water and oilfield injection water
• Central air conditioning chilled water and HVAC circulating water
• Municipal water supply pre-treatment, reclaimed water and waste water
• General industrial water filter duties protecting nozzles, heat exchangers and pumps

Material & Construction

The service life of a metallurgy water filter depends on how well the machine withstands hot, scale-laden cooling water. Every wetted part of this metallurgy filtration equipment is built from corrosion resistant materials. The housing, flanges, top head and drain assembly are manufactured as one complete filter unit; the internal screen is a separate serviceable part and can be replaced without replacing the vessel.

1. Vessel shell — SS304 / SS316LBrushed stainless steel cylindrical shell with clean TIG circumferential welds, pickled and passivated. Carbon steel with anticorrosion coating is available for neutral water to reduce cost.

2. Flanges & sealsBolted stainless steel inlet/outlet flanges to GB / HG / ANSI standard, with EPDM or PTFE gaskets rated for 90 °C cooling water and cooling water treatment chemicals.

3. Top head & drive assemblyStainless steel domed head with bolted cover flange carrying the motor and gearbox; all fasteners and the drive shaft are stainless steel for humid, dusty pump room conditions.

Material Specification Summary

Packaging & Shipping

Each unit is wrapped with anti-rust film, fixed on a fumigation-free plywood pallet and packed in a plywood case with the control cabinet, drain valve and spare seals packed separately. Installation drawing, operation manual and test report are supplied. Shipment by sea, rail or air according to order volume and destination.