CONTAMINATED GAS OR DUSTY AIR CLEANING IN BAG FILTER WITH HELP OF SCREEN AND HORIZONTAL BAGS OF SAID FILTER Russian patent published in 2016 - IPC B01D46/02 B04C9/00 

FIELD: process engineering.

SUBSTANCE: invention can be used in ferrous and nonferrous metallurgy, chemical industry, food industry, production of construction materials, etc, where cleaning of gases or air from dust is required. This method comprises feed of contaminated gas or air into cyclone-type bag filter, into its top part. Note here that flow fed to filter case top part is swirled downward for coarse cleaning at case bottom. Then, said flow is fed to filter bags for fine cleaning of gas or air. Thereafter, cleaned gas or air is withdrawn from bag filter for filter bags to be cleaned in turns. Contaminated gas or air is fed into said case, in between screen flexile membrane outer surface and case top part wall inner surface. Note here that gas flows are swirled. Larger volume of gas or air is fed to filter bags via membrane screen meshes for further fine cleaning with the help of filter bags. Filter bags are flushed either all at a time or only their parts are flushed, Dust is removed from screen membrane by exciting it to oscillations by gas or air flow. Dust is removed from filter case top part inside by gas or air flow.

EFFECT: longer life of filter bag cloth, power saving for flushing.

2 cl, 3 dwg