Huakang's LCM-D/G series long bag offline pulse dust collector is a product that integrates current long bag offline pulse dust removal technology and is introduced to users.

Advantages and Applications of Long Bag Offline Pulse Bag Dust Collector

The long bag offline pulse dust collector is a large-scale dust removal equipment with high processing air volume, good dust cleaning effect, high dust removal efficiency, reliable operation, easy maintenance, and small footprint. Widely used for dust control and material recovery in metallurgical industries such as steelmaking blast furnaces, raw material coal injection preparation factories, building materials industries, power, chemical industries, carbon black, asphalt concrete mixing, boilers, flue gas dust removal and other industries.

Structure Description of Long Bag Offline Pulse Bag Dust Collector

(1) Shell part: including clean room (or gas purification box, gas box), filter box. Partition partitions, maintenance doors, and shell structures. The cleaning room is equipped with a lift valve, a flower board, and a short spray pipe; The filtering room is equipped with filter bags and their frameworks.

(2) Ash hopper and ash unloading mechanism: There are ash hoppers and screw conveyors.

(3) Inlet and outlet bellows body: including inlet and outlet air ducts and intermediate partitions.

(4) Pulse dust cleaning device: including pulse valve, air bag, lifting valve cylinder and its solenoid valve, etc.

(5) Compressed air pipeline and its pressure reducing device, oil-water separator, oil mist device, etc.

(6) Ladder platform and railing: This part fully considers the convenience of maintenance and ensures operation.

(7) If the equipment is used for dust removal in power plant boilers, its structure has another design to meet the special requirements of users.

Working principle of long bag offline pulse bag dust collector

The LCM-D/G series long bag offline pulse dust collector is mainly composed of an upper box body, a middle box body, an ash hopper, an inlet air equalizing pipe, a bracket, a filter bag and blowing device, an ash unloading device, etc. The dusty air enters the ash hopper of each compartment from the inlet air equalizing pipe of the dust collector, and under the guidance of the ash hopper guide device, the large particle dust is separated and directly falls into the ash hopper, while the finer dust uniformly enters the middle box body and is adsorbed on the surface of the filter bag. The clean air enters the upper box body and is discharged into the atmosphere through various offline valves and exhaust pipes. As the filtration process progresses, the dust on the filter bag accumulates more and more. When the equipment resistance reaches the limited resistance value (usually set at 1500Pa), the cleaning device automatically closes the offline valve of one room according to the differential pressure setting value. Then, the electromagnetic pulse valve is opened according to the set program to stop air blowing. Compressed air is used to instantly blow the pressure increase inside the filter bag, shaking off the dust on the filter bag into the ash hopper and discharging it through the ash discharge valve.

Filtering condition:

The dusty gas is distributed into the ash hoppers of each filtration unit through the middle inlet duct. Coarse dust particles directly fall into the ash hoppers under the action of inertia and gravity, while fine dust particles enter the filtration chamber with the turning of the airflow. Under the filtering effect of the dust cake on the surface of the filter bag, the dust accumulates on the outer surface of the filter bag. The filtered gas enters the upper box from the inside of the filter bag and converges to the clean gas collection pipe - exhaust duct, and is discharged into the atmosphere through the system fan.

Dust cleaning condition:

As dust accumulates on the surface of the filter bag, the filtration resistance will continue to increase, and the cleaning process needs to be initiated. The LCM-D/G series long bag offline pulse dust collector adopts an offline dust cleaning mechanism with separate chambers and air shut-off. At the beginning of the dust cleaning process, first close the clean air outlet duct of one of the filtration units, so that the filter bag of that unit is in a state of no airflow passing through. Then open the electromagnetic pulse valve to spray compressed air into the filter bag, and make the clean air in the clean air chamber form secondary air and be sucked into the inside of the filter bag. The filter bag deforms and vibrates rapidly, shaking off dust. After a period of settling, open the clean air outlet of the unit to restore the filtering state, and the next filtering unit enters the cleaning state until all units implement a pulse cleaning, completing one cleaning cycle of the dust collector.

Dust removal control:

The dust collector adopts a PLC control system, and according to different processing techniques, pressure difference control and timed control can be selected for back blowing and dust cleaning. The pressure difference control mechanism is based on the resistance value of the dust collector to open and close the reverse blowing process. When the resistance of the dust collector reaches the preset value for dust cleaning start-up, usually 1200-1500Pa, a control signal for starting the reverse blowing cycle is issued. The dust collector repeats the cycle of "cleaning settling filtering" unit by unit until the resistance of the dust collector decreases to the set lower limit of 1000Pa. The pressure difference control mechanism can keep the resistance of the dust collector within a certain range, ensuring good dust removal efficiency and low operating energy consumption.

Timed control refers to arranging timed blowback based on empirical values, generally used to handle systems with relatively stable operating conditions.

Dust treatment:

The dust collected by the dust collector falls into the ash hopper and is transported to the ash storage bin through equipment such as chain conveyors and elevators, and is regularly transported out.

Drawing of Long Bag Offline Pulse Bag Dust Collector

Long bag offline pulse bag dust collector case

Customer situation: A smelting manufacturer in Hefei has ordered a long bag offline pulse bag dust collector from our company. After trial operation, the export smoke and dust content can reach below 30mg/m ³, meeting environmental protection requirements.

Usage effect: It can purify the smoke and dust generated during the smelting process, improve the working environment of workers, and gain recognition from users.