Much attention is paid to the purification of process gases and air in production. This event is carried out to prevent environmental pollution, correct production processes and reduce equipment wear. For the purification of gaseous media, special equipment is used - filters.
Bag filters field of application
We will consider one of the types of cleaning devices - the so-called bag filter. This type of filter is the most effective and widespread in practice. Its design is fairly simple and cheap to maintain. Sleeve filters have proven themselves well:
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in the woodworking industry;
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at petrochemical plants;
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in flour factories;
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at enterprises of ferrous and non-ferrous metallurgy;
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In the production of glass and plastic.
The effectiveness of the use of baghouse filters is associated with their design, thanks to which any filter material can be used. At the same time, achieve the desired degree of purification that meets any requirements for production conditions.
Design and principle of operation
Bag filters are a metal case, inside of which there is a filter material in the form of a cloth. The fabric is sewn in such a way that it can be put on like a sleeve on a special frame (hence the name of the structure). Several sleeves inside the body are located so that their lower part is attached to the lattice nozzles, and the upper part is fixed to a common frame. Each sleeve has a cover.
The system operates as follows: contaminated gas or air is supplied to the lower part of the housing, passes through the filter material of the bags and comes out completely cleaned into the upper part of the apparatus. And from there it goes either further to the technological process or is emitted into the atmosphere.
Regeneration process
During a long continuous cleaning process, the fabric of the sleeves becomes overgrown with adhered dust, sawdust and other contaminants. This is detrimental to the efficiency of the apparatus. Leads to energy waste. A regeneration process is provided for cleaning the sleeves. Bag filter regeneration can be:
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mechanical;
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backward;
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impulse.
Pulse regeneration is the most effective. It is produced by applying a pulse of compressed air pressure to the inside of the sleeve. Dust and dirt fall off the fabric and fall into the bin space for further disposal. The sleeve is clean and ready to use again. Pulse regeneration is automatic and does not need to be constantly disassembled�
