Process and installation for the intermittent cleaning of dust-l

Gas separation – Means within gas stream for conducting concentrate to collector

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Details

55 99, 55131, 55133, 55136, 55474, 55479, 55150, B03C 300

Patent

active

044066724

ABSTRACT:
An intermittently operated apparatus for cleaning dust laden gases has a gas-tight housing, a pair of spaced gas-permeable walls holding a filter bed consisting of granular filter material. A centrally located conveying pipe is mounted to the housing for regenerating the filter bed after a predetermined amount of operating time. A high electric potential is applied in the region of the filter bed for removing dust particles from the dust laden gas which is flowing through the permeable walls and the filter bed. From time to time, the gas cleaning mode is interrupted and the granular filter material of the filter bed is regenerated by fluidizing the same in the conveying pipe. A system comprising a plurality of such filtering apparatus always maintains one of the apparatus in a regenerating mode while the remaining filter devices are in gas cleaning mode. Thus, the simultaneous operation of cleaning and regenerating is accomplished. The use of a filter bed having a thickness of about 25 to 100 mm. and consisting of granular filter material having a grain size of about 0.5 to 2.0 mm. in combination with application of high electric potential charge of about 10,000 to 60,000 volts achieves significant improvement over prior apparatus and methods.

REFERENCES:
patent: 4142873 (1979-03-01), Berz
patent: 4203736 (1980-05-01), Berz
patent: 4220478 (1980-09-01), Schuff
patent: 4295867 (1981-10-01), Shopin et al.
patent: 4308036 (1981-12-01), Zahedi et al.

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