Dust Collectors
BCE offers the following types of dust collectors, engineered to suit your process:
BCE has standard lines of bag filters, ranging from 9 to 420 bags, predesigned for competitive pricing and quick turn-around. Standard pressure ratings are ±20" W.G. for flat-walled collectors and up to 17" Hg for round units. See these pages for descriptions and general drawings of BCE standard fabric filter dust collectors:- C-Series: Cylindrical, 7 to 154 bags, up to ±17" Hg design
- S-Series: Square, 9 to 400 bags, ±20" W.G. design
- R9-Series: Rectangular, 126 to 234 bags, 9-bags deep, ±20" W.G. design
- R14-Series: Rectangular, 252 to 420 bags, 14-bags deep, ±20" W.G. design
Where custom collectors are needed, BCE is fully capable to design, build and install everything from single units to entire systems, specific to your application. If high-pressure units are required, our engineers have decades of combined experience designing dust collectors to the ASME Code, Section VIII, Divisions 1 and 2. Call us to discuss your requirements.
For many applications where the dust is free-flowing and non-agglomerating, a collector with 6" diameter pleated filters is an economical choice over a bag filter. Although pleated filters operate at lower air-to-cloth ratio than bag filters, the large filter area per element typically results in a significantly smaller housing size. Call BCE and we will be happy to discuss whether a pleated filter is right for your application.
Large cartridge filters are ideal for low-temperature applications with a small dust loading and large air volume. As with pleated filters, cartridges provide a large filter area per element resulting in a compact unit, requiring much less headroom than a bag filter of comparable capacity. BCE uses a downflow design to promote dust settling and maximize the air-to-cloth ratio.
Fabric filter dust collectors are the equipment of choice to remove fine particulates from air with the efficiency to satisfy EPA regulations. In addition to their extremely high efficiency, they are easy to maintain, having no moving parts, and are very versatile with a wide range of fabrics available for just about any dust type, loading or process environment.
Dust-laden air enters the baghouse through one or more inlet nozzles. The air velocity drops, allowing larger particles to fall out of the air stream into the hopper. Dust is further separated when the air contacts a baffle, which serves to distribute the air, deflect dust into the hopper and protect the filter elements from direct, high-velocity, dust impingement. Fine particles are carried into the bag area and deposited on the exterior surfaces of the filters, as the cleaned air passes through to the insides of the bags and into the clean air plenum, leaving the collector through the outlet nozzle(s). The fabric provides a surface on which the dust collects and the operating efficiency is achieved when a sufficient dust cake forms, reducing permeability.
The filters are cleaned row-by-row when a short burst of compressed air fills a blowpipe above a row of bags, exiting the pipe through a series of orifices, one over each bag. Each bag is fitted with a venturi, designed to draw in air from the clean air plenum to create a powerful pneumatic shock, pressurizing the bag. The shock wave travels down the length of the bag and the dust is dislodged by the combined actions of flexing the bag and reversing the air flow. The dust falls into the hopper for removal by the discharge equipment. The cleaning pulse is extremely rapid (about 100 msec.) and only affects a fraction of the collector's overall filter area, allowing for continuous on-line operation. The efficiency of the cleaning pulse also allows pulse-jet filters to operate at higher air-to-cloth ratios than mechanical shakers or reverse-air collectors.
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