Maintenance of air quality is vital in any working
environment. Dust removal systems do exactly this through removal of
the particulate materials from the air and internal environment. A
simple working formula of these systems is to capture, transmit and
collect these impurities. Capturing is done through devices such as
capture hoods, transmission through ducting system and final collection
through either simple filters to more complicated devices like
scrubbers or electrostatic precipitators.
Operation of Dust Collection Systems
The main aim of filtration is to remove particles
from the air usually in the range of 2 – 10 micrometers and to handle
large volume of air continuously. Simple dust collection systems
operate via a single unit vacuum system to develop suction and complete
air filtration. Particulate matter is pulled into the impeller and
into a container of a bag. The clean air can then be re-circulated into
the room.
Larger and more complex systems have a two stage process, which is able to isolate particles based on their sizes. Cyclone systems are a good example of these systems. The air can then be exhausted outside or can be re circulated back to the house or production facility.
Oxidizing Air Pollution Control Systems
Air Pollution Control Systems use heat or elements with additives to
stimulate oxidation reactions. These oxidizers “wash” polluted air
through platinum or palladium and cause oxygen to separate and result
to formation of non toxic waste products such as nitrogen and oxygen.
Non – Oxidizing Air Pollution Control Systems
These equipments use a different method to filter
out impurities. They use air scrubbers (wet or dry) to complete the
filtration. The dry types are able to remove gases like sulfuric oxides
or hydrogen chlorides, by use of alkaline materials. Wet scrubbers
clean out dust and larger pollutants using water or other reagents.
Electrostatic filters operate with electrical fields to clean out air.
They clean out smoke, mists and liquid contaminants in the air.
Pulse Jet Cartridge
This type of filtration system is basically applied
for areas with ambient temperature conditions and basically for free
flowing dusts and materials. They are thus suitable for lighter to
heavy volumes of particles in the air. Their typical processing volumes
are 1.7 – 60 cubic meters of air.
Pulse Jet Hose Bag Type Filter
Some great advantages of this type of filters are
they have longer life of the filter bags, lesser emission levels,
reduced power consumption, and also lesser space requirement on the
floor. They are very suitable where air flows are in very large
volumes, higher temperatures, and harder to clean materials.
Furnace Fume Extraction Systems
They are applied in areas of operation where high
heat is and fumes are generated. They serve to extract these flames and
smoke from the sites or the workshop thus making the working
environment pleasurable and friendly. These fumes are purified through
the pollution prevention and treatment sites. Areas best suited are
Induction furnaces, AOD furnaces, exothermic reaction furnaces and
electric arc furnaces.
