| 摘要 |
The invention relates to a method for cleaning filters for dust-laden waste gases, comprising several filter elements (2) which are arranged vertically in a filter housing (1) and which have an upper open end (16) and a lower close d end (15) with at least one feed line (9) for the dust-laden waste gases and at least one discharge line (11) for the cleaned waste gases, in addition to a device for injecting surges of compressed air into the open end (16) of the filter elements (2). In order to reduce pressure fluctuations in the filter and to provide efficient cleaning with pulsations of compressed air in the l ow pressure range i.e. from approximately 0.8 to 3 bars, the filter is divided into several filter modules (1) respectively comprising at least one filter element (2). At least two filter modules (1) are arranged in a filter housin g (10) or a filter chamber. The filter modules (1) are cleaned alternately and each filter module (1) is associated with a discharge line (11) with a shut- off element (3) for the clean gas. A control device (19) is provided for the shut-off elements (3), whereby when the filter modules (1) which are to be cleaned are changed, the shut-off element (3) of the cleaned filter modules (1) is open and the shut off element (3) is closed in a diametrically oppose d manner for the filter module (1) to be cleaned. As a result, any pressure fluctuations in the filter are minimised.
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