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Qingdao Foundry Machine Co.,Ltd.
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Special Report
Air from the high-voltage pulse electromagnetic pulse valve by pipeline from the high-speed spray blowing holes through the dust bag at the top of the neck of the venturi tube, including induction of secondary air, into the bag inside, generated along the longitudinal direction of the bag short pulse pressure wave, will be deposited on the surface of the dust bag is peeled off, the dust falling into the ash bucket, clean gas through the net gas chamber to exclude outside. When the solenoid valve power, pulse valve diaphragm closes off the only high-voltage pulse stream, once the end of the cleaning.
Online cleaning problem is the high-voltage pulse is generated by the air stream with the main reverse pressure air bag crossed the jitter of the bag, remove the bag surface dust accumulation, into a piece of dust dropped into the lower portion of the precipitator ash hopper , and then by the discharge means from the plane. In this process, the main high-voltage pulse to overcome air resistance to air flow, its strength is bound to be weakened. Effective filtration area of the filter is also an instant (milliseconds) is reduced. From an industrial point of view, this area is to reduce the impact on the process generated by the system is negligible. In recent years, online filter cleaning method has been widely used in various welding smoke, dusty industrial workplace.
2. The off-line cleaning
Line cleaning filter design requirements for the multi-chamber combination thereof, to achieve by room cleaning. When a filter chamber needs cleaning, the filter chamber with the primary air flow to isolate, isolated by filtration chamber is disposed at the inlet or outlet valves to achieve. This process is about holding 2 ~ 3min. Such a result, the process of cleaning operation every precipitator total filter area (or called gross filtration area) is reduced with a chamber filter cloth area, to reduce the total filtration area also results in an effective filtration area (also known as net filter area) is reduced, it is clearly not economical, increased investment in infrastructure, at odds with the wishes of the owners. In this respect inferior to the superior cleaning online. However, the gas stream from the main bag isolated on the implementation of cleaning, technically there are a number of advantages:
The amount of air through the high-voltage pulse bag
1.Do not have a lot to effective cleaning and lower pressure required.
1.Do not have a lot to effective cleaning and lower pressure required.
2.Be cleared from the surface of the bag down into a piece of dust have enough time to fall into the hopper, little chance of flying again.
3.Cleaning frequency drops, bag life is extended.
3.Cleaning frequency drops, bag life is extended.
Small number of pulse valve configuration can reduce the time of investment and maintenance.
Cleaning required amount of compressed air less, save energy.
Cleaning required amount of compressed air less, save energy.
High cleaning efficiency, dust can be kept low pressure drop, with the result that operating costs dedusting system decreases.
