Dust Removal Equipment

Baghouse Dust Collector: A baghouse dust collector is a dry dust removal device. It is suitable for capturing fine, dry, non-fibrous dust. The filter bags are made of woven fabric or non-woven felt, utilizing the filtering effect of the fibrous fabric to filter dusty gas. When dusty gas enters the baghouse dust collector, particles with large size and high density settle down due to gravity, falling into the ash hopper. The gas containing finer dust is trapped by the filter material as it passes through, resulting in purified gas.

Operating Principle

Baghouse dust collectors and granular bed dust collectors are included in the filtration systems. The former typically uses filter bags made from organic or inorganic fiber fabrics as the filtering layer, while the latter often employs a filtering layer composed of particles of various sizes, such as quartz sand, river sand, ceramic balls, slag, graphite, carbon black, and ultrafine powder, etc.

As the powder repeatedly adheres to the outer surface of the filter bag, the powder layer continually thickens, increasing the resistance value of the fabric bag dust collector; the pulse valve diaphragm issues a command, and the pulse valve opens when submerged from both sides. The compressed air inside the high-pressure air bag is released. If there is no dust or it is reduced to a certain extent, the mechanical cleaning process will cease.

The bag dust collector consists mainly of the upper housing, middle housing, lower housing (ash hopper), cleaning system, and ash discharge mechanism, etc.

The performance of a bag dust collector is crucially dependent on not only the correct selection of filter bag material but also the cleaning system, which plays a decisive role. Therefore, the cleaning method is one of the characteristics that differentiate bag dust collectors and is an important aspect of their operation. It falls under the category of medium-efficiency dust collectors and is suitable for purifying high-temperature flue gases, making it a widely used type of dust collector, often applied in boiler flue gas dust removal, multi-stage dust removal, and pre-dust removal. Its main drawback is the relatively low efficiency in removing fine particles (less than 5μm).

2. Cyclone Dust Collector: A type of dust removal equipment, the cyclone dust collector operates by causing the dusty air stream to rotate, separating and capturing dust particles from the air flow with the help of centrifugal force, and then allowing the particles to fall into the hopper under the force of gravity.

3. Water Film Dust Collector: Dusty gas is introduced from the bottom of the筒体 in a tangential direction, rises in rotation, and dust particles are separated by centrifugal force, thrown against the inner wall of the筒体, and adsorbed by the water film layer flowing on the inner wall. They then flow to the bottom cone with the water stream and are discharged through the dust outlet. The formation of the water film is achieved by several nozzles located at the top of the筒体, which spray water tangentially to the wall. This ensures that a thin, downward-rotating water film is always present on the inner wall of the筒体, thereby enhancing the dust removal efficiency. This wet-type dust collector has a simple structure, low metal consumption, and low water consumption. However, its drawbacks include a high height, difficulty in arrangement, and the presence of water droplets during actual operation.