Structural Composition

Vessel: Carbon steel / stainless steel (304/316L), pressure-bearing fully enclosed structure.

Filter Candles: Plum-blossom metal framework to support filter cloth and prevent cloth collapse.

Filter Cloth: Materials including PP, PE, PPS, PTFE, which determine filtration precision.

Control System: PLC automatically executes the full cycle: pre-coating, filtration, slag discharge, backblowing and washing.

Auxiliary Components: Air compressor, differential pressure gauge, valves, support frame and other accessories.

Working Principle

Initial Depth Filtration:Materials enter the vessel under a pressure of 0.1–0.6 MPa. Large particles are trapped on the surface of filter cloth, while fine particles penetrate into the pores of filter media and get adsorbed. The initial pressure drop ranges from 0.05–0.2 MPa.

Filter Cake Formation (Surface Filtration):Particles accumulate on the filter cloth to form a filter cake with thickness of 1–5 mm. The cake itself acts as an additional filtering layer, lifting the effective filtration precision from 10 μm up to 1 μm.

Stable Operation & Backblowing:When differential pressure rises to 0.3–0.5 MPa, the feed material inside the vessel is drained. Compressed air at 0.4–0.6 MPa is injected for backblowing to peel off and discharge the filter cake, allowing filter candles to be reused repeatedly.

Applicable Standards

Design & Manufacturing: HG/T 21637-1991, SH/T 3411

Flange Standards: GB, HG, ANSI, DIN, GOST

Electrical Control Standards: GB/T 14048.1, GB 50054

Core Features

High Precision:Filtration precision covers 0.1–80 μm. Pre-coating with diatomaceous earth or activated carbon is available to achieve finer filtration accuracy.

Fully Sealed Structure:Leak-tight design, applicable for toxic, flammable and sterile process conditions.

Automatic Operation:Equipped with PLC automatic control; multiple filters can be installed in parallel for uninterrupted continuous operation.

Reusable Filter Media:Filter candles and filter cloth can be cleaned and regenerated repeatedly to cut operating costs.

Multi-functional Performance:Integrated functions including filtration, concentration, cake washing, drying and filter cake recovery.

Parameters

Parameter Item	Standard Range	Remarks
Filtration Area	0.9 ~ 60 m²	Customizable up to 150 m²
Filter Candle Specification	φ60 ~ φ80 mm，L=1000 ~ 2000 mm	Plum-blossom tube / sintered mesh / composite filter cloth
Quantity of Filter Candles	5 ~ 61 pieces	Increases with model size
Filtration Precision	0.22 ~ 100 μm	Metal candle: 0.5 ~ 25 μm; PP/PTFE cloth: 1 ~ 100 μm
Design Pressure	0.6 / 1.0 / 1.6 / 2.0 MPa	Maximum customizable to 2.5 MPa
Operating Temperature	-20 ~ 250 ℃	PP ≤90°C; PE ≤130°C; metal material ≤250°C
Vessel Diameter	350 ~ 2500 mm	Matched according to filtration area
Flow Rate Range	10 ~ 300 m³/h	Related to filtration area, precision and fluid viscosity
Backblowing Pressure	0.2 ~ 0.6 MPa	Common working pressure: 0.3 MPa (compressed air / nitrogen)
Housing Material	304 / 316L stainless steel, rubber-lined carbon steel	316L is preferred for corrosive working conditions

Parameters