Boiler bag filter is a kind of high-efficiency, low-resistance, low-energy consumption dust removal equipment, which is widely used in industrial boiler flue gas dust removal in electric power, chemical industry, metallurgy, building materials and other industries. This article will introduce the boiler bag filter in detail, including its working principle, structural characteristics, design selection, application scope and maintenance.
First, the working principle.
When the dust-containing gas passes through the dust collector, the dust with larger particles slides down the surface of the filter bag to the ash hopper under the action of inertia force and gravity, and the small particles of dust are trapped on the surface of the filter bag. As time goes by, the dust on the surface of the filter bag accumulates more and more, and the resistance of the dust collector gradually rises, and when the resistance reaches the set value, the ash cleaning device starts to work, removing the dust adhering to the surface of the filter bag and falling into the ash hopper. After the cleaning is completed, the resistance of the dust collector decreases, and the dust collector starts working again.
Second, structural characteristics.
The boiler bag filter is composed of air inlet, ash hopper, filter bag, ash cleaning device and air outlet. Among them, the filter bag is the core component of the dust collector, which is usually made of textile or felt and other materials, which has good air permeability and filtration effect. The ash cleaning device can be selected according to different working conditions and needs.
3. Design selection.
The following factors need to be considered when selecting and designing a boiler bag filter:
1.Treatment air volume: Determine the treatment air volume of the dust collector according to factors such as flue gas flow and temperature.
2.Filtration area: The filtration area of the dust collector is calculated based on factors such as processing air volume and filtration speed.
3.Filtration speed: The faster the filtration speed, the higher the dust removal efficiency, but the greater the resistance. It needs to be selected according to the actual working conditions.
4.Inlet dust concentration: according to the particle size and concentration of dust in the flue gas, select the appropriate filter bag material and ash cleaning method.
5.Outlet Emission Concentration: Determine the outlet emission concentration according to environmental protection requirements, and select the appropriate number of filter bags and ash cleaning method.
6.Equipment resistance: The lower the equipment resistance, the lower the energy consumption. It is necessary to select the appropriate filter material and filtration method to reduce the resistance of the equipment.
Fourth, the scope of application.
Boiler bag filters are widely used in various types of industrial boilers, such as chain furnaces, reciprocating furnaces, boiling furnaces, etc. It has strong adaptability and can be used for the supporting construction of new boilers and the renovation of old boilers. At the same time, the boiler bag filter can also be applied to flue gas dust removal in other industrial fields, such as cement, chemical, metallurgical and other industries.
5. Maintenance.
In order to ensure the stable operation of the boiler bag filter and prolong its service life, regular maintenance is required. Specific measures include: regularly check the wear and tear of the filter bag, and replace the seriously worn filter bag in time;Regularly check the operation of the ash cleaning device to ensure that it is working normally;Perform regular and comprehensive inspections and maintenance of the dust collector to ensure its proper operation. At the same time, it is also necessary to pay attention to the daily maintenance and maintenance of the equipment, such as keeping the equipment clean and preventing dust accumulation.
In short, as a high-efficiency, low-resistance, low-energy dust removal equipment, boiler bag filter has a wide range of application prospects in industrial boiler flue gas dust removal. Understanding and mastering the knowledge of its working principle, structural characteristics, design selection, application scope and maintenance will help to better use and maintain the boiler bag filter, improve its operation efficiency and prolong its service life.