SE446945B

SE446945B - Device for filtration of water and wastewater

Info

Publication number: SE446945B
Application number: SE8302778A
Authority: SE
Inventors: G Fransen
Original assignee: Kommunernas Konsultbyra Foreni
Priority date: 1983-05-18
Filing date: 1983-05-18
Publication date: 1986-10-20
Also published as: SE8302778D0; SE8302778L

Abstract

This invention is a device for filtration of water and wastewater. The device of this invention is unique in that continually flushed filters are positioned with a sand filter base (2) made of perforated plates, whereby the parallel plates are connected to parallel conduits (4) hydraulically connected to pipe necks (6) and equipped with throttle holes (5) for even distribution of flush water, which is directed to the ends or outlet (6a, 6b, etc) of the pipe necks (6) through a travelling flush trolley (7) equipped with teeth (15) for agitating sand. The flush trolley is equipped with a flush-pump (8), which is equipped with a delivery pipe (9), cut-off discs (10, 11), and with a flush outlet pump (12) connected to a collecting pan (13), whereby the flush trolley (7) is continuously connected thereafter to the pipe necks (6), whereby the cut-off discs (10, 11) are designed to seal the ends or outlet (6a, 6b, etc) of the two pipe necks (6) which are situated in front and behind the flush trolley (7) as seen in its direction of travel and that the pipes (4) are preferably equipped with rectangular sections.<IMAGE>

Description

15 20 25 30 446 945 Funktionen enligt uppfinningen skall nu beskrivas. The function according to the invention will now be described.

Genom sandskiktet l, som vilar på en filterbotten 2, som består av perforerade plattor eller rör, filtrerar man vatten 3 genom strömning uppifrån och nedåt. Det filtrerade vattnet uppsamlas i ett företrädesvis med rektangulärt tvärsnitt bestående rör 4 genom ett antal, över rörlängden jämnt fördelade hål 5 och ledes vidare genom filtratutlopp 6a, 6b, 6c, 6d, 6e etc hos motsvarande rörstudsar eller celler 6 till en bassäng 16. När sandfiltret efter en tids drift blir igensatt, renspolar man filtret. Detta sker medelst en vandrande spolvagn 7 med vilken följer en spol- vattenpump 8, som är försedd med ett tryckrör 9, avstäng- ningsskivor 10 och ll och en med uppsamlingsränna 13 an- bragt spolavloppspump 12. Spolvattenpumpen 8 anslutes under spolvagnens 7 gång, till filtercell efter filtercell eller rörstuds efter rörstuds då cellmellanväggar saknas, genom .filtratutloppen 6a, 6b, 6c, 6d, 6e etc, som då tjänstgöra som spolvattentillopp, varvid spolvattnet fördelas genom hålen S. Vattenhastigheten genom hålen skall vara så hög att'jämn fördelning längs cellen uppnås. Det jämnt förde- lade vattenflödet föres vidare genom filterbottnen 2 och uppsamlas i rännan l3 och pumpas bort med spolavloppspumpen 12. Genom att utloppet före respektive efter den filter- cell, som är under spolning genom anslutning till tryck-~ röret 9 är avstängt, kunna cellmellanväggarna 14 slopas. Om så erfordras av utrymmesskäl, utför man avstängningsskivor- na automatiskt upplyftbara i ändlägena. Spolvattenmängderna kunna reduceras genom att tänder 15 vid spolvagnens 7 vand- ring kunna luckra upp sandens yta, utan att spolvattenpum- pen är i drift. Försök ha visat, att spolvattenmängden minst kan halveras. s 10 15 20 446 945 Man har således en sandfilterbotten 2, som före- trädesvis användes för kontinuerligt spolade filter och som består av perforerade plattor, monterade på parallella, med företrädesvis rektangulär sektion bestående rör 4 med hydraulisk förbindelse genom strypande öppningar så dimen- sionerade, att jämn fördelning uppnås, från rörens ände tillfört spolvatten efter genomgång av hålen 5, varvid spolvatten företrädesvis tillföres via en vandrande spol- vagn 7, som är så anordnad, att samtidigt som spolvatten tillföres ett rör äro närmast intilliggande rör avstängda medelst spolvagnen medföljande avstängningsskívor. Det \ speciellt nya är dels att filterbottnen utgöres av perfore- rade plattor eller rör som stå i hydraulisk förbindelse med rörstudsar eller celler med stryphâl för jämn fördelning av spolvatten vatten dels att spolvatten tillföres i ändarna eller utloppen 6a, 6b etc av rörstudsarna 6 genom en vand- rande spolvagn som efter hand anslutes till rörstudsarna.Through the sand layer 1, which rests on a filter bottom 2, which consists of perforated plates or pipes, water 3 is filtered by flowing from top to bottom. The filtered water is collected in a tube 4, preferably with a rectangular cross-section, through a number of holes 5 evenly distributed over the length of the tube and passed on through filtrate outlets 6a, 6b, 6c, 6d, 6e etc. of corresponding pipe spouts or cells 6 to a basin 16. When the sand filter is blocked after a period of operation, the filter is flushed. This is done by means of a traveling flushing carriage 7, which is accompanied by a flushing water pump 8, which is provided with a pressure pipe 9, shut-off discs 10 and 11 and a flushing drain pump 12 arranged with a collecting channel 13. The flushing water pump 8 is connected during the flushing carriage 7 to filter cell after filter cell or pipe spout after pipe spout when cell partitions are missing, through the filtrate outlets 6a, 6b, 6c, 6d, 6e etc., which then serve as rinsing water inlet, the rinsing water being distributed through the holes S. The water velocity through the holes must be so high that the cell is reached. The evenly distributed water flow is passed on through the filter bottom 2 and is collected in the gutter 13 and pumped away with the flushing drain pump 12. By the outlet before and after the filter cell, which is being flushed by connection to the pressure pipe 9, being able to the cell partitions 14 are eliminated. If required for space reasons, the shut-off discs are automatically raised in the end positions. The amounts of rinsing water can be reduced by allowing teeth 15 to loosen the surface of the sand during the travel of the rinsing trolley 7, without the rinsing water pump being in operation. Try to have shown that the amount of flushing water can be halved at least. s 10 15 20 446 945 Thus one has a sand filter bottom 2, which is preferably used for continuously flushed filters and which consists of perforated plates, mounted on parallel, with preferably rectangular section consisting of pipes 4 with hydraulic connection through restricted openings so dimensioned , to evenly distribute rinsing water supplied from the end of the pipes after passing through the holes 5, rinsing water preferably being supplied via a traveling rinsing trolley 7, which is arranged so that at the same time as rinsing water is supplied to a pipe, adjacent pipes are closed by means of rinsing carriage. . What is particularly new is that the filter bottom consists of perforated plates or pipes which are in hydraulic connection with pipe fittings or cells with throttle holes for even distribution of rinsing water, and that rinsing water is supplied at the ends or outlets 6a, 6b etc. of the pipe fittings 6 through a traveling flushing trolley which is gradually connected to the pipe fittings.

Uppfinningen är naturligtvis icke begränsad till detta utförande utan kan självklart varieras inom ramen för uppfinningstanken.The invention is of course not limited to this embodiment but can of course be varied within the scope of the inventive idea.

Claims

10 l5 20 446 945 4 Patent claims

Device for filtering water and wastewater, characterized in that continuously flushed filters are arranged with a sand filter bottom (2) made of perforated plates, the parallel plates being arranged on parallel pipes (4), which are in hydraulic connection with pipe fittings (6) and are provided with throttle holes (5) for even distribution of rinsing water, which is supplied to the ends or outlets (6a, 6b, etc.) of the pipe fittings (6) by a traveling, with teeth (15 ) for flushing trolley (7), which is provided with a flushing water pump (8), which is provided with a pressure pipe (9), shut-off discs (10 and 11) and a flushing drain pump (12) arranged with a collecting channel (13), and the flushing carriage (7) is continuously connected to the pipe spouts (6), the closing discs (10 and 11) being arranged to close the ends or the outlets (6a, 6b, etc.) of the two pipe spouts (6), which are located in front respectively behind the trolley (7) seen in its field tning.

Device according to claim 1, characterized in that. that the pipes (4) are made with a rectangular section.