Reverse jet technology bag filters for industrial applications
Dustdown® is a very high efficiency self-cleaning mechanical filter, equipped with an automatic on-line cleaning system with a Reverse Jet of compressed air. Dustdown® was designed by Tecnosida® to address the specific problems associated with treating emissions that contain a wide assortment of dust types; fine, very fine, potentially explosive (ATEX version), particulates, smoke and unburnt dust (BIOMASS version).
The air to be treated enters the lower part of the dust remover, passes through a pre-filtering chamber that allows the coarse dust to precipitate, protecting the filter from excessive dust loads. The flow then reaches the filtering surface and passes through it with consequent realization of the separation of the particulate.
The dust collected by the numerous sleeves then precipitates to the bottom of the filter where the hoppers direct it to the collection system (cochlea, rotary star valve, clapet valve or screw with conduit/pipe) or automatic discharge.The filtering surface is kept in perfect condition thanks to automatic cleaning cycles. These are managed on the basis of the filter pressure loss readings to limit the compressed air consumption (graph to the side) and increase the lifetime of the sleeves.
Filtering fabrics can also be made with different materials and with different features depending on the intended use. The following table shows the main variables:
MAXIMUM TEMPERATURE | RESISTANCE TO HYDROLYSIS | RESISTANCE TO ACID | RESISTANCE TO ALKALI | RESISTANCE TO OXIDATION | |
Polypropylene | 90/100 | excellent | excellent | excellent | bad |
Polyolefina for high temperature | 125/130 | excellent | excellent | excellent | bad |
Polyamide | 110/115 | bad | moderate | good | moderate |
Polyacrylonitrile c. | 110/115 | good | moderate | moderate | good |
Polyacrylonitrile o. | 125/130 | good | good | moderate | good |
Polyester | 150/150 | bad | moderate | bad | good |
M-aramid | 180/220 | moderate | moderate | moderate | good |
Polytetrafluoroethylene | 250/280 | excellent | excellent | excellent | excellent |
Tecnosida® is a perfect partner for planning and execution of ordinary and extraordinary maintenance services required to :
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