Filtering apparatus

Abstract

A filtering apparatus with a plurality of filtering elements (11) which can be accommodated in a filter housing (1) having a filter inlet (7) for fluid to be filtered and a filter outlet (9) for the filtered fluid, wherein during the filtration operation, at least one of the filtering elements (11) can be back-flushed by means of a back-flushing device (45, 49) in order to dedust the effective filtering surface of said filtering element, the back-flushing device comprising a pressure control device (19) for assisting the back-flushing operation, is characterized in that the pressure control device comprises a hydraulic accumulator (19), the one fluid chamber (47) of which can be filled during the filtration operation with a quantity of dedusted fluid and can be connected for a back-flushing operation via a back-flushing guide (45) to the clean side (29) of the filtering element (11); to be dedusted, and in that, for a back-flushing operation, a further fluid chamber (48) of the hydraulic accumulator (19) can be subjected to a gas pressure in order, by means of a resultant movement of the separating element (59) of the hydraulic accumulator (19), to at least partially again dispense the filling amount of the dedusted fluid for the back-flushing operation from the first fluid chamber (47).

Description

technical field [0001] The invention relates to a filter device with a plurality of filter elements which can be accommodated in a filter housing which has a filter inlet for the fluid to be filtered and a filter inlet for the filtered fluid filter outlet, wherein during the filtration process, at least one of the filter elements can be backwashed to clean its effective filter area by means of a backwashing device comprising a pressure control device for assisting backwashing . Background technique [0002] A filter device of the same type is known from DE 10 2007 054 737 A1. A filter device of this type enables a continuous filter operation, in which the filter elements to be regenerated are backwashed one after the other, while the filtration continues on the remaining filter elements, so that the filter operation is not interrupted at any time. [0003] In known filter devices, the backflushing process is not only carried out in such a way that the system pressure prese...

AI Technical Summary

Problems solved by technology

[0005] However, the magnitude of the hydrodynamic effect produced by the blocking process depends on the flow rate and is therefore limited accordingly

Therefore, in areas of use where recalcitrant pollutants are considered to be difficult to strip from the filter area, there is the danger that the effect of the hydrodynamically assisted backflushing is not entirely satisfactory

Images