Pollution Control System & Dust Collection/Extraction system is generally comprises of Dust extracting, Bag filter & Ducting. We generally design the system based on the data of Packing Machines. Following are the description for the equipments to be used in the system
The bag filter is essentially a system containing a filter fabric of some kind which removes dust and particulate from a gas stream. The cleaned gas then can be vented to the atmosphere; the dust may be a product such as material dust, carbon black, fumes from furnace, fly ash from a boiler burning coal. Bag filters are among the oldest and most widely applied particulate emission control devices. The clean air emerges from one side of the medium while the dust is collected on to bottom. The pulsejet mechanism of compressed air facilities are continuous cyclic cleaning of bag dust cake.
These are employed for air containing dust or particles, fibers, flakes and having higher temperature than ambient. Usually offered in single inlet styled fans are moderately efficient and useful for dust collection, drafting and exhaust/pollution control duties. Impellers are radial tipped or backward inclined bladed type having flat of airfoil designs, with closed or open constructions. The p-v characteristic is flatter and blowers are designed for long hard duties.
Online Spark Arrestor:
A spark arrester is an online device which prevents the emission of flammable debris from combustion sources, such as internal, fireplaces, and wood burning stoves. Spark arresters play a critical role in the prevention of filter media fire and ignition and explosive atmospheres in bag house. As such, their use is required in the steel industry due to hot iron chips.
Cyclones (or centrifugal collectors) create a ‘cyclonic’ or centrifugal force, similar to water going down a drain, to separate dust from the polluted air stream. The centrifugal force is created when dust filled air enters the top of the cylindrical collector at an angle and is spun rapidly downward in a vortex (similar to a whirlpool action). As the air flow moves in a circular fashion downward, heavier dust particles are thrown against the walls of the collector, collect, and slide down into the hopper.