DEVICE FOR THE MULTISTAGE GAS CLEANING Russian patent published in 1995 - IPC

FIELD: chemical engineering. SUBSTANCE: plant has gas-cleaning apparatuses of the first and second stages of cleaning and an exhaust fan connected in series by means of gas conduits. The apparatuses of the first and second stages of cleaning are represented in the form of doubled dust extractors. Each of them has inner main and outer auxiliary dust extractors with the common exhaust pipe and the housing of the latter and with the additional chambers for cleaning the gas-dust mixture formed by the lateral surfaces of their housings and the surface of the covers of the auxiliary dust extractors. The open face end of the housing of the main dust extractor is located, as far as the height is concerned, between the branch pipe of the auxiliary dust extractor and the face end of the exhaust pipe. The input branch pipe of the main dust extractor of the apparatus of the first stage of cleaning is connected with the suction line, for example, with the source of raising dust whose exhaust pipe is connected with the sucking side of the gas conduit. The forcing side of the latter is connected with the branch pipe of the input of the main dust extractor of the apparatus of the second stage of cleaning. In this case the branch pipe of the output from the chamber for cleaning the auxiliary dust extractor of the apparatus of the second stage of cleaning is connected with the sucking side of the additionally mounted gas conduit whose forcing side is connected with the branch pipe of the input to the chamber for cleaning the auxiliary dust extractor of the apparatus of the first stage of cleaning and the additional transport line of the finally captured product from the apparatus of the second stage of cleaning whose exhaust pipe is connected with the atmosphere for example. The exhaust pipe of the apparatus of the second stage of cleaning can be additionally equipped with a gas conduit for removing the purified gas from the latter. As a variant it is possible to exclude the additional transport line of the finally captured product from the apparatus of the second stage of cleaning into the chamber of the final cleaning of the apparatus of the first stage of cleaning, and to directly feed the finally captured product into the line of utilization of the captured product in the apparatus of the first stage of cleaning. EFFECT: enhanced efficiency of cleaning, simpler design as a result of using the centralized, in one place, utilization of the captured product. 2 cl, 1 dwg