DK170037B1 - Device for a sedimentation tank for removing deposited sediment from the bottom of the tank - Google Patents
Device for a sedimentation tank for removing deposited sediment from the bottom of the tank Download PDFInfo
- Publication number
- DK170037B1 DK170037B1 DK558987A DK558987A DK170037B1 DK 170037 B1 DK170037 B1 DK 170037B1 DK 558987 A DK558987 A DK 558987A DK 558987 A DK558987 A DK 558987A DK 170037 B1 DK170037 B1 DK 170037B1
- Authority
- DK
- Denmark
- Prior art keywords
- basin
- wedge
- mat
- sludge
- conveyor
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/18—Construction of the scrapers or the driving mechanisms for settling tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G25/00—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement
- B65G25/04—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement the carrier or impeller having identical forward and return paths of movement, e.g. reciprocating conveyors
- B65G25/08—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement the carrier or impeller having identical forward and return paths of movement, e.g. reciprocating conveyors having impellers, e.g. pushers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
- Removal Of Floating Material (AREA)
Description
DK 170037 B1DK 170037 B1
Opfindelsen angår en indretning til et sedimenterings-bassin eller lignende anlæg, og som tjener til at flytte og fjerne aflejret sediment og/eller slam fra bassinets nedre del, hvorved der er anbragt en af en line 5 trukket transportør, som kan forskydes frem og tilba ge langs med bassinets bund og herved flytte sediment og·/ eller slam hen mod bassinets ene ende med henblik på at opsamle det her.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a sedimentation basin or similar facility which serves to move and remove deposited sediment and / or sludge from the lower part of the basin, thereby providing a forward and retractable conveyor pulled by a line 5 pass along the bottom of the basin, thereby moving sediment and / or sludge towards one end of the basin in order to collect it here.
10 Hidtil har der i mange sedimenteringsbassiner været anvendt kædeskrabere til at fjerne det slam, som efterhånden falder til bunds i bassinet. Disse kædeskrabere består af et eller flere skraberblade, som strækker sig på tværs i bassinets breddeudstrækning, og 15 som slæbes fremefter ved hjælp af kontinuerligt løbende kæder i en paternosterværksbevægelse. Disse konstruktioner har visse fordele, idet de giver et godt rensningsresultat og i øvrigt har god funktionssikkerhed så længe som konstruktionen er intakt. Trods disse 20 kædeskraberes solide grundkonstruktion indtræffer der imidlertid ofte alvorlige havarier. Disse beror på den kraftige korrosion, som alle komponenter, inclusive kæderne bliver udsat for. I sedimenteringsbassiner til rensningsanlæg findes der nemlig et meget 25 korrosivt miljø pa grund af, at der i rensningsværker-nes indgående kemiske fældningstrin anvendes sure a-luminium- og jernsalte, som udnyttes til bl.a. fosfatudfældning .So far, in many sedimentation basins, chain scrapers have been used to remove the sludge which eventually falls to the bottom of the basin. These chain scrapers consist of one or more scraper blades extending transversely in the width of the basin, and 15 being dragged forward by continuously running chains in a paternoster mill movement. These designs have certain advantages in that they provide a good cleaning result and otherwise have good functional safety as long as the structure is intact. However, despite these 20 chain scrapers' solid foundation construction, serious accidents often occur. These are due to the strong corrosion to which all components, including the chains, are exposed. Namely, in sedimentation basins for wastewater treatment plants, there is a very high corrosive environment due to the use of acidic alumina and iron salts in the incoming chemical precipitation stages of the wastewater treatment plants. phosphate precipitation.
Det har også været foreslået at anvende en travers, 30 som trækkes frem over vandoverfladen i bassinet. På arme på denne travers er der monteret en skraber, som kan hæves og sænles. En ulempe ved denne konstruktion er, at den er for kompliceret at anvende til eksisterende bassiner, som ofte er forsynet med forskellige slags 35 udrustninger over bassinet, såsom gangbroer og anden udrustning, som virker hindrende. Endvidere forstyrres DK 170037 B1 2 sedimenteringen af de vertikale organer, som holder skraberen.It has also been proposed to use a traverse, 30 which is pulled forward over the water surface of the basin. On the arms of this traverse is a scraper that can be raised and lowered. A disadvantage of this construction is that it is too complicated to apply to existing basins, which are often provided with various kinds of equipment over the basin, such as walkways and other obstructions which appear obstructive. Furthermore, the settling of the vertical members holding the scraper is disturbed by DK 170037 B1 2.
Det har endvidere været foreslået at anvende linetruk- , ne skrabere eller skraberanordninger, hvor en eller 5 flere liner trækker en med skrabere monteret vogn f.Furthermore, it has been proposed to use line pullers, scrapers or scraper devices, where one or 5 more lines draw a carriage mounted with scrapers f.
eller slæde hen over eller mod bassinets bund i en frem og tilbagegående bevægelse. (SE-B-423 968; US-A-2 866 557; US-A-2 768 749; US-A-4 090 966, GB-A-1 504 518). I forhold til de tidligere kædetrukne 10 skrabere udgør denne teknik en forbedring ved dens betydeligt enklere, lettere og billigere konstruktion. Systemet indebærer imidlertid, at der må anvendes forskellige indretninger til at vende skraberbladene og styre denne vending fra vertikal til horisontal 15 stilling og omvendt under den frem- og tilbagegående bevægelse, som udføres med linen. Skraberbladene, som består af metalblade, som er kantstillede i skraberet-ningen og ofte er forsynet med gummikantlister, strækker sig i bassinets breddeudstrækning vinkelret på 20 transportretningen. Ved skraberbladenes frem- og tilbagegående bevægelse hvirvles der imidlertid slam op, såkaldt slamflugt, på grund af den turbulens, som opstår bag bladene, og der kan derfor ikke opnås maximal virkningsgrad. Den belastning, som indretnin-25 gerne udsættes for, medfører også, at de skal fremstilles af metal, og for at de ikke alt for hurtigt skal blive tæret op af korrosion, skal de fremstilles af et mere syrefast materiale, hvorved fremstillingsomkostningerne forøges.or sliding across or toward the bottom of the basin in a reciprocating motion. (SE-B-423 968; US-A-2 866 557; US-A-2 768 749; US-A-4 090 966; GB-A-1 504 518). Compared to the previous chain-drawn 10 scrapers, this technique represents an improvement over its considerably simpler, lighter and cheaper construction. However, the system implies that different devices must be used to turn the scraper blades and control this turn from vertical to horizontal position and vice versa during the reciprocating movement performed with the line. The scraper blades, which consist of metal blades, which are bordered in the scraper direction and often provided with rubber edge strips, extend in the width of the basin perpendicular to the direction of transport. However, in the reciprocating movement of the scraper blades, sludge, so-called sludge escape, is swirled due to the turbulence that occurs behind the blades, and therefore maximum efficiency cannot be achieved. The load to which the devices are subjected also causes them to be made of metal, and so as not to be corroded too quickly by corrosion, they must be made of a more acid-resistant material, thereby increasing manufacturing costs.
30 Der er derfor behov for andre typer skrabe- eller * transportindretninger til transport af sediment og slam i sedimenteringsbassiner, hvor belastningen Å finder sted på en anden måde, således at indretningen kan fremstilles af et lettere, men dog korrosions-35 bestandigt materiale. Der er endvidere behov for at DK 170037 B1 3 kunne forøge virkningsgraden ved at minimere slamflugten.Therefore, other types of scraping or transporting devices are required for transporting sediment and sludge in sedimentation basins, where the load Å takes place in a different way, so that the device can be made of a lighter, yet corrosion-resistant material. Furthermore, there is a need for DK 170037 B1 3 to increase efficiency by minimizing sludge escape.
Det er formålet med opfindelsen at anvise en indretning af den indledningsvis nævnte art, som opfylder 5 disse krav.It is an object of the invention to provide a device of the type mentioned in the preamble which meets these requirements.
Det har nu overraskende vist sig, at dette kan opnas, idet indretningen ifølge opfindelsen er ejendommelig ved, at transportøren består af en måtte med et antal organer, som hvert har et kileformet tværsnit 10 og er anbragt i hovedsagen vinkelret på transportørens forskydningsretning med kilespidsen vendende i den tilbagegående retning og kilefoden i den fremadgående retning.It has now surprisingly been found that this can be achieved, the device according to the invention being characterized in that the conveyor consists of a mat with a plurality of means, each having a wedge-shaped cross-section 10 and arranged substantially perpendicular to the displacement direction of the conveyor with the wedge tip facing. in the backward direction and the wedge foot in the forward direction.
Ydereligere ejendommelige egenskaber for indretninqen i-15 følge opfindelsen er angivet i. p.atentkravene.Further peculiar characteristics of the device according to the invention are given in the patent claims.
Turbulensen omkring "skrabe"-indretningerne bliver ved hjælp af opfindelsen minimal, og hele måtten udgør i princippet en transporterende enhed. Indret-20 ningen ifølge opfindelsen kan gives en længde, som er nøje tilpasset det pågældende bassins form og længde. Endvidere kan den frem- og tilbagegående bevægelsesslaglængde tilpasses indenfor vide grænser, men kan frem for alt gøres meget kort, hvilket med-25 fører, at der kan anvendes enkel hydraulik-eller pneumatikteknik.The turbulence around the "scraper" devices is minimized by means of the invention, and the whole mat is in principle a transport unit. The device according to the invention can be given a length which is closely adapted to the shape and length of the pool in question. Furthermore, the reciprocating stroke stroke length can be adjusted within wide limits, but above all can be made very short, which means that simple hydraulic or pneumatic techniques can be used.
Opfindelsen forklares nedenfor under henvisning til tegningen, hvor fig. 1 set fra siden viser et sedimenteringsbassin 30 med en indretning ifølge opfindelsen, DK 170037 B1 4 fig. 2 en indretning ifølge opfindelsen set fra oven, fig. 3 en yderligere udførelsesform for en indretning ifølge opfindelsen set fra siden, og fig. 4 endnu en ud før eises form for indretningen ifølge 5 opfindelsen set fra.oven.The invention is explained below with reference to the drawing, in which fig. 1 is a side view of a sedimentation pool 30 with a device according to the invention; FIG. 2 is a plan view of a device according to the invention; FIG. 3 is a side view of a further embodiment of a device according to the invention; and FIG. 4 shows a further view of the form of the device according to the invention seen from above.
Et langstrakt sedimenteringsbassin er i sin helhed angivet med henvisningstallet 1. Bassinet 1 afgræn-ses af en bund 2, to langsider 3, en bageste kort side 4 og en forreste kort side 5. En slamlomme 6 10 er indrettet i den forreste del af bassinet.An elongated sedimentation basin is indicated in its entirety by reference numeral 1. The basin 1 is bounded by a bottom 2, two long sides 3, a rear short side 4 and a front short side 5. A sludge pocket 6 10 is arranged in the front part of the basin. .
Med henvisningstallet 7 er angivet et armeret plastnet, som har en naskevidde på 150 mm, og som bærer et antal transportorganer 8, som er fastgjort på nettet 7 vinkelret på bassinet l's længderetning. Som det frem-15 går af figur 1, har transportorganerne 8 hvert et kileformet tværsnit i form af en vinkelret trekant. Organerne 8 kan ganske enkelt bestå af trykimprægneret træ, idet et brædt med rektangulært tværsnit opsaves langs tværsnittets diagonal, således at der dannes to 20 organer 8. Hvert organ 8's kilespids'9 er rettet mod bassinets bageste korte side 4, og dets katete 10 er rettet mod den forreste korte side 5. Midt på nettet 7 i længderetningen løber et trækoptagende bånd 11 af rustfrit stål. Om ønsket kan der i stedet for båndet 25 11 anvendes en mindre fleksibel stang. Båndet eller trækstangen 11 er i hver ende fastgjort til en line 12, som via fire venderuller 13a,b,c,d, to i hver ende af bassinet 1, leder linen til en drivmeka- ’Reference numeral 7 denotes a reinforced plastic mesh having a nose width of 150 mm and carrying a plurality of transport means 8 secured to the mesh 7 perpendicular to the longitudinal direction of the basin 1. As can be seen from Figure 1, the conveying means 8 each have a wedge-shaped cross section in the form of a perpendicular triangle. The members 8 may simply consist of pressure-impregnated wood, a board of rectangular cross-section being sown along the diagonal of the cross-section, so as to form two 20 members 8. Each wedge tip 9 of each member 8 is directed to the rear short side 4 of the basin and its catheter 10 directed to the front short side 5. In the middle of the web 7 in the longitudinal direction, a tensile receiving band 11 of stainless steel runs. If desired, a less flexible bar may be used instead of the belt 25 11. The belt or drawbar 11 is attached at each end to a line 12 which, via four turning rollers 13a, b, c, d, two at each end of the basin 1, directs the line to a drive mechanism.
nisme 14, som trækker linen 12 skiftevis i den ene 30 og anden retning. Drivmekanismen 14 kan i denne Anism 14, which draws the line 12 alternately in one 30 and another direction. The drive mechanism 14 can in this A
forbindelse være en gearmotor med linetromle eller et hydraulisk cylindersystem, som har en frem- og tilbagegående bevægelse, og i hvis ender linen 12 er DK 170037 B1 5 fastgjort. Ved dels at placere venderullerne 13a,b i niveau lige over bassinbunden 2, dels som følge af linen 12's opstramning, og dels yderligere i dette tilfælde som følge af organerne 8's lille massetæthed 5 kommer nettet 7 med organerne 8 blot til at berøre bunden 2 ganske let, hvilket medfører, at såvel slidtage som driftmodstand bliver minimal. Ved på udsatte steder, såsom trækstangen 11 at belægge nettets underside med såkaldt glideplast undgås, at enheden sli-10 des.connection may be a gear motor with a line drum or a hydraulic cylinder system having a reciprocating movement, and at whose ends the line 12 is fixed DK 170037 B1 5. By placing the rollers 13a, at level just above the basin bottom 2, partly as a result of the tightening of the line 12, and partly further in this case due to the small mass density 5 of the members 8, the net 7 with the means 8 simply touches the bottom 2 quite easily. , which means that both wear and operating resistance become minimal. By coating the underside of the net with so-called sliding plastic in exposed places, such as the drawbar 11, the unit 10 is not worn.
Såfremt bassinet er meget bredt, kan der, hvis det er nødvendigt for at opnå en jævn gang, anbringes flere trækliner 12 eller flere trækstænger 11.If the basin is very wide, if necessary to achieve a smooth course, several pull lines 12 or more draw bars 11 can be placed.
Den i fig. 1 viste indretning arbejder med en frem- og 15 tilbagegående bevægelse, som har en slaglængde på 40 -50 cm.The FIG. 1 shows a reciprocating and reciprocating movement having a stroke length of 40-50 cm.
Slaglængden kan yderligere afkortes ved at anvende en række kileformede elementer, som er indbyrdes sammenkoblede, som vist i fig. 3, hvorved trækstangen 11 20 eller trækbåndet/linen 11/12 forløber gennem elemen terne. Organerne 8 danner da i sig selv en måtte.The stroke can be further shortened by using a series of wedge-shaped elements which are interconnected, as shown in FIG. 3, whereby the drawbar 11 20 or the drawbar / line 11/12 extend through the elements. The organs 8 then in themselves form a mat.
Ved en udførelsesTorm for indretningen ifølge opfindelsen kan denne i stedet for nettet 7 have fleksible, uelastiske bånd 15, hvorpå organerne 8 er fastgjort.In an embodiment of the device according to the invention, instead of the net 7, it may have flexible, inelastic bands 15 on which the means 8 are attached.
25 Båndet 15 er da i hver ende fastgjort til en trækstang 16. Båndet kan ligeledes erstattes med uelastiske liner. Trækstangen 16 er igen forbindet med træklinen 12 til at trække indretningen.The belt 15 is then attached at each end to a drawbar 16. The belt can also be replaced with inelastic lines. The drawbar 16 is again connected to the draw line 12 to pull the device.
Organerne 8 kan, som nævnt ovenfor, bestå af træ, men 30 de kan også vers formdannede faste elementer, som kan være forsynet med kQ'blingsindretninger 17,18 til drejeligt eller stift at sammenkoble elementerne indbyrdes, som vist i fig. 3.The means 8, as mentioned above, may consist of wood, but they may also be verse shaped solid elements which may be provided with cables 17,18 for rotating or rigidly interconnecting the elements as shown in FIG. Third
DK 170037 B1 6DK 170037 B1 6
Forsøg, som har været udført, har godtgjort, at en indretning ifølge opfindelsen har samme kapacitet som en kædeskraber, der, som nævnt ovenfor, hidtil har været anset som den bedste slamtransportør i sedimenterings-5 bassiner, og indretningen ifølge opfindelsen er såle des de ovennævnte såkaldte lineskrabere overlegen. Det har også vist sig, at såvel energiforbruget som slidtagen under drift er overordentlig lav.Tests that have been carried out have shown that a device according to the invention has the same capacity as a chain scraper, which, as mentioned above, has hitherto been considered the best sludge conveyor in sedimentation basins, and the device according to the invention is thus the The above-mentioned line scrapers are superior. It has also been found that both energy consumption and wear during operation are extremely low.
I ovennævnte udførelsesform har måtten være forsynet 10 med en trækline 12, som trækker i begge ender af måtten. Ued en anden udførelsesform kan den del af linen 12, som trækker måtten tilbage, elimineres og erstattes med en fjederindretning, som spændes, når der trækkes i linen 12, og som siden trækker måtten tilbage, 15 når linen 12 slækkes.In the above embodiment, the mat has 10 provided with a draw line 12 which pulls at both ends of the mat. In another embodiment, the part of the line 12 which withdraws the mat can be eliminated and replaced with a spring device which is tensioned when the line 12 is pulled and which subsequently withdraws the mat 15 when the line 12 is extinguished.
Det er af stor betydning, at måtten indeholder gennemstrømningsåbninger, således at væske/slam kan passere fra måttens underside til dens overside, da der ellers ville bygges sediment op under måtten. Dette opnås 20 ved den fig. 3 viste udførelsesform ved hjælp af en spalte, som findes mellem elementerne.It is of great importance that the mat contains flow openings so that liquid / sludge can pass from the bottom of the mat to its upper side, as sediment would otherwise build up under the mat. This is achieved by the FIG. 3, by means of a gap which exists between the elements.
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8604573A SE454140B (en) | 1986-10-27 | 1986-10-27 | APPLICATION OF A FORMING AND RETURNING SCRAP TRANSPORT FOR THE TRANSFER OF METAL HYDROXIDE SLIDES IN SEDIMENTATION POOLS AND SIMILAR IN WATER PURIFICATIONS |
| SE8604573 | 1986-10-27 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK558987D0 DK558987D0 (en) | 1987-10-26 |
| DK558987A DK558987A (en) | 1988-04-28 |
| DK170037B1 true DK170037B1 (en) | 1995-05-08 |
Family
ID=20366083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK558987A DK170037B1 (en) | 1986-10-27 | 1987-10-26 | Device for a sedimentation tank for removing deposited sediment from the bottom of the tank |
Country Status (4)
| Country | Link |
|---|---|
| DK (1) | DK170037B1 (en) |
| FI (1) | FI94596C (en) |
| NO (1) | NO168871C (en) |
| SE (1) | SE454140B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE507592C2 (en) * | 1991-08-13 | 1998-06-22 | K Z Handels Ab | Transport element at a reciprocating scrap conveyor for moving sludge at sedimentation pools and the like at water treatment plants |
| EP2289607A1 (en) | 2009-07-30 | 2011-03-02 | Alonso Sánchez Osma | Sludge sweeper scraper |
| SE534576C2 (en) | 2010-02-23 | 2011-10-11 | Zickert Foervaltnings Ab K | sludge conveyor |
-
1986
- 1986-10-27 SE SE8604573A patent/SE454140B/en not_active IP Right Cessation
-
1987
- 1987-10-26 DK DK558987A patent/DK170037B1/en not_active IP Right Cessation
- 1987-10-26 FI FI874703A patent/FI94596C/en not_active IP Right Cessation
- 1987-10-26 NO NO874461A patent/NO168871C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NO874461L (en) | 1988-04-28 |
| NO874461D0 (en) | 1987-10-26 |
| FI94596C (en) | 1995-10-10 |
| SE8604573D0 (en) | 1986-10-27 |
| NO168871B (en) | 1992-01-06 |
| SE454140B (en) | 1988-04-11 |
| DK558987D0 (en) | 1987-10-26 |
| DK558987A (en) | 1988-04-28 |
| FI94596B (en) | 1995-06-30 |
| NO168871C (en) | 1992-04-15 |
| FI874703A (en) | 1988-04-28 |
| FI874703A0 (en) | 1987-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105417790B (en) | Removable belt thickener filters pressing complete machine | |
| EP0532484B1 (en) | Transporting element of a reciprocable scraper for moving sludge in settling basins and similar objects at water purification plants | |
| DE2053203C3 (en) | Method and apparatus for collecting and removing floating sludge from the surface of an enclosed liquid | |
| DK170037B1 (en) | Device for a sedimentation tank for removing deposited sediment from the bottom of the tank | |
| JP6970504B2 (en) | Chain and sludge scraper | |
| US3962086A (en) | Apparatus for the separation of the components of an aqueous concrete grout | |
| JP2006247536A (en) | Sedimentation basin | |
| KR20130018693A (en) | Apparatus for the transport of sludge | |
| KR101182753B1 (en) | The High Speed Screens with floating apparatus | |
| JP6984811B2 (en) | Settling basin equipment | |
| JP2017077507A (en) | Scum-gathering device, and sludge-scraping machine having the same | |
| WO2005066420A1 (en) | System and method to prevent the impingement of marine organisms at the intake of power plants | |
| JP2019135045A (en) | Precipitate removal device | |
| JP2007117870A (en) | Moving bed apparatus for sludge collection and method for sludge collection | |
| US3799349A (en) | Apparatus for cleaning muddy water | |
| JP6008701B2 (en) | Flight and sludge scraper | |
| US1763412A (en) | Sewage-disposal apparatus | |
| SE521171C2 (en) | Sludge scraper arrangement, comprises movable scraper with curved or bent transport part | |
| JPS59139905A (en) | Screening and apparatus for conveying scraped sand | |
| JP2000334216A (en) | Flight for sludge raking machine | |
| KR20130139552A (en) | Sludge collector | |
| JP4680954B2 (en) | Dust remover | |
| DE2726434A1 (en) | Oil slick cleaning device - uses ship with two articulated jibs, each float supported, and with rotary steel bridge connecting both floats | |
| CN114259783A (en) | A thick grid structure for dirty treatment facility of excrement | |
| NO145906B (en) | DEVICE FRAME FRAME WITH SAFETY CASE SHEET. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed |