Dust Removal Equipment

Dust removal equipment:

Baghouse Dust Collector: A baghouse dust collector is a dry dust filtration 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 action of the fibrous material to filter dust-laden gas. Upon entering 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 retained by the filter material as it passes through, thereby purifying the gas.

Working Principle

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

As the powder repeatedly adheres to the outer surface of the filter bag, the powder layer continuously thickens, causing the resistance value of the bag dust collector to increase accordingly; the pulse valve diaphragm issues a command, and when immersed on both sides, the pulse valve opens, allowing compressed air from the high-pressure air bag to flow through. If there is no dust left or it's reduced to a certain extent, the mechanical cleaning operation will cease.

The bag dust collector consists mainly of the upper body, middle body, lower body (ash hopper), cleaning system, and 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 distinguishes bag dust collectors and is a vital 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, commonly applied in boiler flue gas dust removal, multi-stage dust removal, and pre-dust removal. However, its main drawback is the lower 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 trapping dust particles against the wall of the collector with centrifugal force, and then allowing the particles to fall into the ash hopper under the influence of gravity.

3. Water Film Dust Collector: The dusty gas is introduced from the bottom of the筒体in a tangential direction, rotates upwards, and the dust particles are separated by centrifugal force, thrown towards the inner wall of the筒体, and adsorbed by the water film layer flowing on the inner wall of the筒体. They are then carried to the bottom cone with the water flow and discharged through the dust outlet. The formation of the water film is achieved by several nozzles located at the upper part of the筒体, which spray water tangentially to the wall. This ensures that a thin, spiraling water film flows downwards on the inner wall of the筒体, thereby enhancing the dust removal efficiency. This type of wet 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 in the operation.