Dust removal equipment is generally divided into bag dust collectors and cartridge dust collectors based on the filtering material

Introduction to Bag Filter

Bag dust collector generally refers to a bag type dust collector, which is a dry dust filtering device. It is suitable for capturing small, dry, and non fibrous dust. The filter bag is made of textile filter cloth or non textile felt, and uses the filtering effect of fiber fabric to filter the dust containing gas. When the dust containing gas enters the bag dust collector, the large and heavy particles of dust settle down due to the action of gravity and fall into the ash hopper. When the gas containing finer dust passes through the filter material, the dust is blocked and the gas is purified.

Working principle of bag filter

(1) The efficient dust removal efficiency of a bag filter is inseparable from its dust removal mechanism. When dusty gas enters the ash hopper through the lower intake pipeline of the dust collector and the guide plate, due to the collision of the guide plate and the reduction of gas velocity, coarse dust will fall into the ash hopper, while other small dust particles will enter the filter bag room with the gas. Due to the inertia, diffusion, obstruction, hooking, static electricity and other effects of the filter material fibers and fabrics, the dust is trapped inside the filter bag. The purified gas escapes from the bag and is discharged through the exhaust pipe.

(2) The accumulated dust on the filter bag is removed by gas reverse washing method, and the removed dust is discharged to the ash hopper and discharged to the ash conveying device through a double layer ash discharge valve. The dust accumulation on the filter bag can also be removed by spraying pulse airflow to achieve the purpose of cleaning. The dust removed is discharged by the ash discharge device.

(3) As the powder repeatedly adheres to the outer surface of the filter bag, the powder layer continuously thickens, and the resistance value of the bag filter also increases; The pulse valve diaphragm sends a command, and when the left and right sides are submerged, the pulse valve opens. The compressed air inside the high-pressure air bag passes through. If there is no dust or it is too small to a certain extent, the mechanical dust cleaning work will stop working.

(4) The gas purification method of the low-pressure pulse bag filter is external filtration, and the dusty gas enters the filter rooms of each unit through a guide tube. Due to the design, the vertical distance between the bottom of the filter bag and the upper opening of the air inlet is sufficient and reasonable, and the air flow is evenly distributed throughout the filter room through appropriate guidance and natural flow direction. The particulate dust in the dusty gas directly falls into the ash hopper after natural sedimentation and separation, Under the guidance of the diversion system, the remaining dust enters the filtering area of the middle box with the airflow and adsorbs on the outer surface of the filter bag. The filtered clean gas is discharged through the upper box and exhaust duct through the filter bag.

Application of Bag Filter

With the development of bag filter technology and the increasing requirements of environmental protection, the application of bag filter is more and more extensive, such as high temperature, high humidity gas, cohesive dust, explosive dust, corrosive gas, abrasive dust, etc.

Structure diagram of bag filter

Engineering case:

Introduction to filter cartridge dust collector

The filter cartridge dust removal equipment is a new type of filter dust removal device, which is composed of filter cartridges as filtering elements or uses pulse jet dust removal. The filtering element of the filter cartridge dust collector is the filter cartridge. The structure of the filter cartridge is divided into four parts: a top cover, a metal frame, a pleated filter material, and a base.

Characteristics of filter cartridge dust collector

The wear of the filter cartridge is small and does not require frequent replacement.

The dust collector has high dust removal efficiency, good filtering effect, small overall size, and stable operation.

The filter cartridge is installed in a skeleton style, with good sealing performance and reliability.

The box is designed with air tightness, with good sealing performance. The inspection door is made of excellent sealing materials, and the air leakage rate is very low.

The arrangement of inlet and outlet air ducts is scientific, and the airflow resistance is small.

Working principle of filter cartridge dust collector

During normal operation of the filter cartridge dust collector, dusty gas enters the dust collector from the top inlet and passes through the filter cartridge. During this process, dust is trapped on the outer surface of the filter cartridge, and clean air enters the clean air chamber through the filter cartridge before being discharged through the outlet. When cleaning the filter cartridge, the control timer will automatically select one or more pairs of filter cartridges for cleaning. At this time, the controller will open the electromagnetic pulse valve, and high-pressure air will directly enter the selected filter cartridge to blow away the dust collected on the surface of the filter cartridge. Dust flows in the direction of the main airflow and falls into the ash hopper under the action of gravity.

Application of filter cartridge dust removal

Filter cartridge dust collectors are mainly used in chemical production lines, pharmaceutical production lines, cigarette production lines, glass production lines, powder coating lines, cement production lines, drilling rig dust collection boxes, coating assembly lines, electrostatic spraying systems, shipbuilding, power, metallurgy, and engineering machinery; Other industrial dust removal and dust recovery systems.

Engineering case: Hangxiao Steel Structure (Hebei) Construction Co., Ltd. 120000m ³/ H Centralized dust removal equipment