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Bag filter

Source: Unknown Author: admin Name: Time: 2018-05-12

Bag filter

During the steel sheet rolling process, a large amount of falling iron oxide powder, cooling water vapor and combustion ash of the lubricating oil are generated, and a large amount of harmful smoke and dust is generated between the rolling mill stands. The main components of the flue gas are FeO, Fe2O3, H2O, oil fume and so on. In order to reduce and eliminate the pollution of these harmful substances to the environment and improve the operating conditions, a smoke exhaust and dust removal system is installed in the frame of the finishing mill, so that all the flue gas generated by the mill is collected in a closed flue gas hood and sucked into a plastic burner dust collector for purification. The dust removal system consists of a dust suction hood, a manual regulating valve, an air pipe, a plastic burner dust collector, a fan, a muffler and a chimney. The dust removal and dust removal system of the finishing mill has multiple dust removal points, and the design air volume of each point is 10000-60000. The dust removal system process: the dust-containing gas at each dust source point captured by the dust extraction hood, enters the dust collector through the pipeline, passes through The plastic burning filter plate is used for dust and gas separation. The purified gas passes through the fan and muffler and is discharged into the atmosphere through the exhaust chimney. The dust attached to the surface of the plastic burning plate is guided by the solenoid valve to blow back the compressed air, and then falls into the dust hopper of the dust collector, and then is discharged through the screw conveyor and the rotary ash discharge valve for unified recovery and treatment. Because fine dust, especially dust below 5um, is the most harmful to human health, in this case, high requirements will be imposed on the dust collector, which requires the dust collector to have high efficiency in capturing dust, small size, and maintenance. Easy maintenance and long service life. Plastic burner dust collector is a new generation dust collector developed to meet these requirements. Plastic burning plate dust collector has the unique advantages of small size, high efficiency, convenient maintenance, filtering dust with high moisture absorption and high water content, filtering oily and fiber dust, and it is unmatched by electrostatic precipitator and bag type dust collector. Since the plastic burner plate dust collector is a dust collector which uses a plastic burner plate instead of a filter bag type filter element, it is suitable for the occasions with water and oil in the gas.

Bag filter

working principle

Dust-containing gas enters the ash hopper from the air inlet or enters the filter bag chamber through the open flange port. The dust-containing gas passes through the filter bag and is filtered to enter the clean air chamber, which is then exhausted by the fan through the exhaust port of the clean air chamber. Dust accumulates on the outer surface of the refilter bag, and it continues to increase, so that the resistance of the bag filter continues to increase. In order to prevent the equipment resistance from exceeding 1200Pa, the bag filter can continue to work, and the dust on the filter bag needs to be regularly removed. The ash cleaning is to start the pulse valve in sequence by the program controller, so that the compressed air (0.5 ~ 0.7MPa) in the air bag is ejected from the nozzle hole (called primary air), and the ambient air is induced by the venturi tube several times than the primary air. (Called secondary air) enters the filter bag and expands rapidly in an instant, and the dust is shaken off in the opposite direction of the air flow to achieve the purpose of dust removal.

Selection principle

(1) The main technical parameters for selecting a bag filter are air volume, gas temperature, dust concentration and humidity. According to the highest values of the air volume, gas temperature, and dust concentration in the process design, and the principle is slightly smaller than the values in the technical performance table, the corresponding dust collector model is the required dust collector model.

(2) The air consumption in the table is the situation when the factory is supplying air centrally. For example, when using the air compressor alone, the air consumption in the table should be enlarged by 1.5 times.

(3) Compressed air consumption column, the proposed air consumption is the maximum air consumption of this type of equipment.

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Bag filter
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Company Address: Shenyang Tongteng Environmental Protection Industrial Co., Ltd.
Phone: 13898801113
Fax: 024-86724248
Email: tongtengshiye@163.com
Address: Building A, Shenghua Youth Street, Shenhe District, Shenyang
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Company Address: Shenyang Tongteng Environmental Protection Industrial Co., Ltd.
Phone: 13898801113
Fax: 024-86724248
Email: tongtengshiye@163.com
Address: Building A, Shenghua Youth Street, Shenhe District, Shenyang