Dust Collector Solution for Biomass Boilers in Paper Mills

For the dust collector solution of biomass boilers in paper mills, the dust removal equipment adopts a high-efficiency, low-energy consumption injection device and advanced **off-line pulse ash cleaning technology**, which prevents secondary dust adsorption and ensures the equipment operates stably at low resistance at all times. The filter bags are made of PPS material with acid, alkali and high temperature resistance (204℃). The filter cages are silicone-treated (no adhesion to filter bags at high temperatures). The dust collector has a pressure resistance of 8000Pa. A fully sealed ash discharge device prevents bridging and clogging of recovered dust, ensuring smooth ash discharge. The dust collector features a bottom air intake design, which avoids direct scouring of filter bags by flue dust, thus extending the service life of filter bags. It also enables the natural sedimentation of large dust particles in flue dust, reduces dust concentration in flue gas, alleviates the working load of the dust collector, and allows normal operation of the dust collector without interruption during maintenance and repair.

Chemical Resistance of PPS (Polyphenylene Sulfide) High-Temperature Filter Material for Paper Mill Biomass Boiler Dust Collectors

PPS is resistant to almost all acids, alkalis and organic solvents, **except strong oxidants**.

Heat Resistance

PPS can be used continuously at temperatures below 190℃, with an instant maximum service temperature of 220℃. Its thermal shrinkage rate is less than 1% at 180℃ without any loss of tensile strength; even after 1200 hours of use at 204℃, the thermal shrinkage rate does not exceed 1.5% and the tensile strength is retained above 80%.

Excellent Hydrolysis Resistance

No loss of tensile strength occurs even after 500 hours of exposure to high temperature (160℃) and high humidity (79%) conditions.

 Application Fields of PPS High-Temperature Filter Material

Thermal coal power plant boilers, waste incinerators, coke ovens, industrial kilns, carbon black production, cement manufacturing and chemical industry.

 Structure, Working Principle and Operation Instructions of Pulse Baghouse Dust Collector

The dust collector consists of an upper box, middle box, hopper, deflector, support frame, filter bag assembly, injection device, off-line valve, ash discharge valve, bypass system, emergency water spray system, as well as detection and control systems. The complete dust collector unit also includes an inspection platform, lighting system and maintenance power supply.

Working Principle of the Dust Collector for Paper Mill Biomass Boilers

Dust-laden gas enters the hopper of each unit through the guide pipe. Under the guidance of the hopper diversion system, large dust particles fall directly into the hopper of each unit after passing through the large dust particle separator, while the remaining dust enters the filtration zone of the middle box with the air flow. The filtered clean gas passes through the filter bags and is discharged through the upper box, lift valve and exhaust pipe. During the filtration process, when dust accumulation on the filter bag surface reaches a certain level, the ash cleaning control device (controlled by differential pressure, timing or manual operation) closes the lift valve according to the set program, takes the current unit off-line, and opens the electromagnetic pulse valve for injection to shake off the dust on the filter bags. The dust falling into the hopper is discharged outward by the pneumatic conveying system.

Structural Features of the Dust Collector for Paper Mill Biomass Boilers

The dust collector for paper mill biomass boilers is an **outside-in type dust collector**, meaning dust-laden gas flows outside the filter bags and clean air flows inside, with filter bag openings facing upward. The ash cleaning function is realized by closing the ash cleaning chamber via the off-line valve (controlled by differential pressure, timing or manual operation) and activating the pulse injection valve for injection, which causes radial deformation of the filter bags to shake off dust. The dust collector is also equipped with an off-line maintenance function.