Abstract:
A device used for eliminating solid particles of pollutants contained in the cooling water of power stations and similar comprises a tubular body (1), on the inner wall (3) of which is fixed a separating sieve (4) in the form of a funnel, the point of which is oriented in the direction of flow, a pressurized water rinsing device (11) provided with a rotationally-symmetric rinsing arm (14) which turns on the external surface (23) of the separating sieve (4), and is provided with at least one ejection slot (15) oriented towards the external surface (23), and a suction pipe (8) which enters the separating chamber (10) of the separating sieve (4). In order to avoid blocking of the rotating parts by coarse particles of pollutant, the cleaning of the separating sieve (4) is performed solely by rinsing from its outer side. On the point of the separating sieve (4) is located a cylindrical vessel (5) the base (6) of which is closed and which is penetrated by the suction end (9) of the suction pipe (8). In order to introduce the rinsing water into the rinsing arm (14), its inner feed end is attached to a bucket (13) fixed to the rotary shaft (12) of the pressurized water rinsing device (11). The edge (19) of the bucket (13) is located level with the annular plain bearing (20) of a fixed distribution chamber (21) connected to the rinsing water pipeline.
Abstract:
A rotary disc filter is provided with a system for inhibiting biological fouling from biological growth on filters that form a part of the rotary disc filter. A biocide is pumped from a biocide supply tank to a manifold and mixed with a backwash to form a backwash-biocide solution. The backwash-biocide solution is sprayed onto filter media during a backwashing operation and the presence of the biocide inhibits and eliminates biological growth on the filter media.
Abstract:
This sludge thickener includes a sludge chamber with a filter surface. This is connected to sludge inlets with equipment producing a hydrostatic pressure for filtration. The sludge chamber is formed by pressure plates, which can be moved to reduce the chamber volume, having reached the hydrostatic dewatering pressure, in order to exert additional mechanical dewatering pressure. There is also a pre-dewatering device containing filtration surfaces and connected to a continuous sludge supply, with which the hydrostatic filtration pressure generator is connected. The filtration surfaces can move relative to the sludge chamber, allowing extraction of the filter cake after opening the pressure plates
Abstract:
A rotary disc filter is provided with a system for inhibiting biological fouling from biological growth on filters that form a part of the rotary disc filter. A biocide is pumped from a biocide supply tank to a manifold and mixed with a backwash to form a backwash-biocide solution. The backwash-biocide solution is sprayed onto filter media during a backwashing operation and the presence of the biocide inhibits and eliminates biological growth on the filter media.
Abstract:
The filtering device constructed according to a modular system comprises filtering plates (3) interassembled, said plates being used either to form a U-shaped gutter, or as a simple plate for a small filter, or as a replacement for a separation channel or as a horizontal filter. The cleaning of the filtering plates is effected on both sides by means of moving conduits spraying (7) and collecting the slurries (8). The upper surface of the filter is divided in small boxes (14) sealed on all sides by a support grid (2) so that the cleaning flow goes necessarily through the corresponding area of the filter. The collection of slurries is effected in a slurry collecting conduit (8) facing the spraying conduit.