Dust monitors are used to detect changes in dust loading due to bag filter breakage or electrostatic precipitator (ESP) malfunction.
Air pollution control systems such as bag filters and electrostatic precipitators are used to separate particulate or dust from the gas stream before it is exhausted into the atmosphere. To maintain the dust concentration of the emission gas below the specified level through effective operation of the control system, it is essential to continuously monitor the dust concentration of the exhaust gas.
In pulverized coal injection systems used by the iron and steel industry, a bag filter separates pulverized coal from hot air. The pulverized coal is then conveyed to a storage tank and the hot air is discharged to the atmosphere. If the bag filter breaks, pulverized coal leaks out into the atmosphere.
Exhaust gases from a pulverized coal-fired boiler contain a large quantity of dust. To prevent this from being released into the atmosphere, an electrostatic precipitator (ESP) is used to remove the dust. To maintain the collection efficiency of an ESP and prevent dust emissions, abnormalities must be detected immediately.
The exhaust gases at a cement manufacturing plant contain a large amount of dust. To prevent dust from being released into the atmosphere, an exhaust gas treatment device such as an electrostatic precipitator (ESP) is used to remove the dust.
When cracks proliferate in the fire-resistant bricks used in a coke oven's combustion chamber, exhaust gases leak into the flue and the dust concentration increases there. By continuously measuring the dust concentration with DT450, emissions to the atmosphere can be controlled.
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