The filter operates under vacuum and is installed in front of an exhaust fan. The unit is equipped with a control device for monitoring the contamination of filter elements (cartridges) and their automatic regeneration (cleaning from settled dust) as they become contaminated. Shaking is carried out by means of pulsed blowing by a compressed air stream.
The filter can be operated in the industrial premises with a temperature of -5…+40C. The ambient medium and air to be cleaned should not contain corrosive gases and vapors.
Composition of the product
The filter consists of the following major components: housing, cartridges, units of regeneration, dust collector, control Cabinet with the controller.
Device and operation
The housing is designed to receive dust and gas emissions through the inlet branch pipe, providing their movement through the cartridges, and removing the purified air to the exhaust fan through the outlet branch pipe. The housing is a hollow metal structure made from profiles and sheet metal.
The housing consists of three main parts: bin, filtering chamber with cartridges and clean air chamber.
In the clean air chamber, there are pipes to supply compressed air for cartridges regeneration. The bottom of the chamber is a mounting plate (sieve) with cartridges to be attached to it. For this purpose, holes are inserted in the mounting plate through which a flow of air from the filter chamber enters the clean air chamber.
The regeneration unit serves for the compressed air accumulation and supply for cartridges regeneration. It is a cylindrical tank with pipes for supply and discharge of compressed air. The solenoid valves, blow-off tubes are included in the set of each unit. The regeneration units are attached to the side wall of the housing on special brackets. The connection of the outlet branch pipes of the units to the compressed air supply pipes is carried out by pressure hoses with the use of clips.
Dust collector (storage tank) is designed to collect dust deposited in the bins when cleaning dust and gas-and-air emissions in the filtering chamber. Dust collector is a metal tank on wheels welded from sheet steel. Dust collectors, using the quick release locking mechanism, are attached to the bottom of the bin.
Oil-free compressed air, which should be drained to the dew point -40C and have a pressure of 0.5-0.7 MPa, is used for regeneration. On the compressed air supply line, it is recommended to install a compressed air control cabinet, which includes a ball valve and a filter regulator with a pressure gauge.
The filter control cabinet with the controller is designed for adjusting and supplying control signals for opening valves, through which a short pulse of compressed air is supplied, which makes dusty cartridges regeneration.
Due to the vacuum created by the fan, dust and gas emissions through the supply flue ducts get inside the filter housing, where they are cleaned with the help of cartridges. The cleaned air from the filter is removed through the outlet branch pipes of the clean air chamber.
Pneumatic equipment and electrical equipment provide automatic regeneration (cleaning) of cartridges as they are contaminated. The degree of cartridges contamination is controlled by a differential pressure gauge, the controller, when reaching the set level of cartridge contamination, sends a signal for cartridges regeneration.
The cartridges are regenerated by shaking the dust deposited on the outer walls of the cartridges. Such shaking is performed by pulsed blowing of cartridges with compressed air. At the command of the controller, a pulsed periodic opening of the solenoid valves installed on the regeneration units occurs, whereupon the compressed air from the blowing units enters the filter housing through the pipes to blow out the cartridges in the sequence specified on the controller. The dust settles when the cartridges are shaken, and dust falls into the bins, and then through the sloping walls of the bins enters the dust collector.