DK156276B

DK156276B - Sludge wagon with means for concentrating the sludge

Info

Publication number: DK156276B
Application number: DK591986A
Authority: DK
Inventors: Henning Frederik Andersen
Original assignee: Larsen I S V Torben Hvidtved L
Priority date: 1986-12-10
Filing date: 1986-12-10
Publication date: 1989-07-24
Also published as: NL8702985A; DE3741936A1; SE8704941D0; DK591986A; DK156276C; DK591986D0; SE8704941L

Description

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Den foreliggende opfindelse angâr en slamsugervogn af den art, osm er angivet i indledningen til krav 1.The present invention relates to a sludge suction vehicle of the kind disclosed in the preamble of claim 1.

Ved almindelig anvendelse opsuges der slam i slamtanken, ofte under samtidig udtrykning af spulevand fra en spule- vandtank pâ vognen til det omrâde, hvorfra slammet suges 5 op, og nâr slamtanken er passende fyldt k0res vognen til et aflæsningssted, hvor slammet kan modtages og eventuelt behandles. Aflæsningen sker normalt ved âbning af tankens endedel. Det er velkendt, at det kan være 0nskeligt at 10 opkoncentrere slammet, og der er udviklet forskellige former for anlæg hertil, som ved modtagestederne kan ud-f0re en afdræning af en stor del af slammets vand- eller væskeindhold.In general use, sludge is sucked into the sludge tank, often during simultaneous expression of flushing water from a flushing water tank on the trolley to the area from which the sludge is drawn up, and when the sludge tank is appropriately filled, the trolley is driven to a discharge point where the sludge can be received and possibly treated. The reading is usually done by opening the end part of the tank. It is well known that it may be desirable to concentrate the sludge, and various types of plants have been developed for this, which at the receiving points can drain a large portion of the water or liquid content of the sludge.

Ved opfindelsen arbejdes ud fra den betragtning, at det 15 ville være fordelagtigt, om en sâdan dræning kunne finde sted allerede i forbindelse med opsugningen af slammet, men ingen af de kendte anlæg er velegnede til i lille mâlestok at anbringes pâ en slamsugervogn. Ved opfindelsen tilstræbes det sâledes at angive en slamsugervogn, 20 som pâ hensigtsmæssig mâde er udformet med et opkoncentre-ringsanlæg for slammet.The invention works on the assumption that it would be advantageous if such a drainage could take place already in connection with the suction of the sludge, but none of the known plants are suitable to be placed on a sludge vacuum cleaner on a small scale. According to the invention, it is thus sought to provide a sludge suction vehicle 20 which is suitably designed with a sludge concentrator.

Vognen if01ge opfindelsen er ejendommelig ved, at den er indrettet som angivet i den kendetegnende del af krav 1.The carriage according to the invention is characterized in that it is arranged as defined in the characterizing part of claim 1.

Slam som indfyldes i tankrummet mellem den âbnelige vægdel 25 og stemplet, vil herved kunne underkastes en filterpresning pâ en sâdan mâde, at væsken afdrænes derfra, medens det kun let fugtige slammateriale 2Sludge filled in the tank compartment between the open wall part 25 and the piston will thereby be subjected to a filter pressing in such a way that the liquid is drained from it, while the only slightly moist sludge material 2

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koncentreres i en kage imellem stemplet og den âbnelige vægdel, hvorved denne kage er let udtagelig ved âbningen af denne vægdel.is concentrated in a cake between the plunger and the open wall part, whereby this cake is easily removable at the opening of this wall part.

Pâ slamsugerens arbejdssted kan den afdrænede væske normalt 5 tilbagef0res umiddelbart til omgivelserne i fbrbindelse med slamopsugningsstedet, hvorved det opnâs, at slamsugeren ikke skal borttransportere nogen st0rre mængde af vand eller uskadelig slamvæske, og at modtagestedet for slammet ikke beh0vër at være udrustet med slamkoncentreringsudstyr 10 med nogen stor kapacitet. Sidstnævnte gælder ogsâ, selvom man i visse tilfælde kan vælge at opsamle den afdrænede væske i slamsugeren for udt0mning andetsteds, idet det væsentlige er, at slamsugeren selv kan opkoncentrere slammet i st0rre eller mindre portioner.At the work site of the sludge cleaner, the drained liquid can normally be returned immediately to the surroundings in connection with the sludge suction site, whereby it is obtained that the sludge cleaner must not carry away any large amount of water or harmless sludge liquid and that the receiving site of the sludge does not need to be equipped with the sludge extractor. any great capacity. The latter also applies, although in some cases it is possible to choose to collect the drained liquid in the sludge suction unit for discharge elsewhere, since it is essential that the sludge suction unit can concentrate the sludge in larger or smaller portions.

Det skal bemærkes, at det allerede er kendt at arbejde med en forskydelig tværvæg i en slamtank, nemlig sâledes at tanken opdeles i et rum for spulevand og et slamtank-rum, hvorved man ved forskydning af tværvæggen kan variere forholdet mellem de to tankrum og sâledes g0re vandtank-20 rummet mindre og slamtankrummet st0rre efterhânden som dette bliver muligt og 0nskeligt.It should be noted that it is already known to work with a displaceable transverse wall in a sludge tank, such that the tank is divided into a space for flushing water and a sludge tank space, whereby the displacement of the transverse wall can vary the ratio between the two tank spaces and thus make the water tank space smaller and the sludge tank larger as this becomes possible and desirable.

Ved opfindelsen kan med fordel bygge videre pâ netop et sâdant System, da man sâ med simple midler kan tilvejebrin-ge det 0nskede pressetryk pâ det nævnte stempel, nemlig 25 blot ved at sætte tryk pâ vandtanken. Det hule stempel kan herved med stor kraft trykkes mod slamrummet og f0rst udvirke, at dette ved den tilh0rende indsnævring udfyldes totalt med vâdt slam, hvorefter væsken i slammet trykkes ind gennem filterpladen for optagelse i og udledning fra 30 hulrummet i stemplet. Det herved opkoncentrerede slamstof vil normalt presses til en flad kage, som udfylder hele tanktværsnittet, og som er umiddelbart tilgængelig ved âbningen af endedelen af tanken, nemlig sædvanligvis den-nes bageste endebund.The invention can advantageously build on just such a system, since it is possible to provide the desired pressure pressure on the said piston with simple means, namely simply by putting pressure on the water tank. The hollow piston can hereby be forcefully pressed against the sludge chamber and first cause it to be filled completely with wet sludge by the associated constriction, after which the liquid in the sludge is forced through the filter plate for admission into and discharge from the cavity in the plunger. The concentrated sludge thereby concentrated will usually be pressed into a flat cake which fills the entire tank cross section and is readily available at the opening of the end portion of the tank, usually its rear end bottom.

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Den afdrænede slamvæske kan udledes til aflevering f.eks. til det System, hvorfra der suges slam, eller den kan ind-pumpes i vandtankrummet eller i et særligt, dertil bereg-net, yderligere tankafsnit.The drained sludge liquid can be discharged for delivery e.g. to the System from which sludge is sucked or it can be pumped into the water tank or in a special, specially designed, additional tank section.

5 I slamsugervogne med i 0vrigt sædvanlig udrustning har man ikke brug for eller râdighed over sâdanne midler, som er n0dvendige for at kunne etablere et blot nogenlunde stort tryk i vandtankrummet for ud0velse af et kraftigt tryk pâ filterstemplet. Hvor et sâdant kraftigt tryk er 10 pâkrævet kan der i stedet benyttes en hydraulisk cylinder indskudt mellem stemplet og den faste endevæg af tanken modsat slamrummet.5 In sludge suction trucks with otherwise usual equipment, there is no need or availability of such means as are necessary to be able to establish a fairly large pressure in the water tank chamber for exerting a strong pressure on the filter piston. Where such a high pressure is required, a hydraulic cylinder inserted between the piston and the fixed end wall of the tank may be used instead of the sludge chamber.

Opfindelsen forklares i det f0lgende nærmere under henvis-ning til tegningen, pâ hvilken 15 fig. 1 i et skematisk sidebillede viser en udf0relsesform for en vogn if0lge opfindelsen, medens fig. 2 er et længdesnitbillede af en del af en anden udf0-relsesform for vognen.BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explained in more detail with reference to the accompanying drawings, in which: FIG. 1 in a schematic side view shows an embodiment of a carriage according to the invention, while FIG. 2 is a longitudinal sectional view of part of another embodiment of the carriage.

I fig. 1 er vist en slamsugervogn forsynet med en slamtank 20 2, der for oven har dels en udsugningsstuts 4 med en til- h0rende slange 6, hvorigennem der fra en ikke vist vacuum-pumpe kan sættes sug pâ tanken 2, og dels en indsugnings-stuts 8 med en tilh0rende slange 10, som er slamsugerens opsugningsslange. Begge stutsene 4 og 8 er forsynet med 25 afspærringsventiler, henholdsvis 12 og 14, og desuden er stutsen 4 pâ ikke vist, men konventionel mâde forsynet med en overfyldningsventil, som ved hjælp af et flyde-legeme lukker ved total væskefyldning af tanken 2.In FIG. 1, there is shown a sludge suction carriage fitted with a sludge tank 20 2, which above has partly a suction plug 4 with an associated hose 6, through which suction on tank 2 can be sucked from a vacuum pump (not shown) and partly a suction plug 8 with an associated hose 10 which is the suction suction hose of the mud cleaner. Both studs 4 and 8 are provided with 25 shut-off valves, 12 and 14, respectively, and in addition, plug 4 is not shown, but conventionally provided with a overflow valve, which, by means of a float body, closes at total liquid filling of the tank 2.

Tanken 2 har pâ sædvanlig mâde en bageste, âbnelig ende-30 bund 16.The tank 2 usually has a rear, open end bottom 16.

Inde i tanken er lejret et pressestempel.18, som er for- 4Inside the tank is a press piston.18, which is front 4

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bundet med en vandretliggende hydraulisk cylinder 20 ud-gâende fra forenden 22 af tanken 2. Dette stempel er ud-f0rt med en filterplade 22 vendende imod den bageste ende-bund 16 og med en tæt forplade 24, sâledes at der mellem 5 pladerne 22 og 24 er dannet et hulrum, der gennem en nedre stuts 26 i forpladen 24 er forbundet med en slange 28, som pâ udpræget sammenb0jelig mâde strækker sig fremad gennem det forreste tankrum til en udledningsstuts 30 pâ forende-bunden 22 af tanken 2.bonded with a horizontal hydraulic cylinder 20 extending from the front end 22 of the tank 2. This piston is provided with a filter plate 22 facing the rear end bottom 16 and with a dense front plate 24, so that between the plates 22 and 24, a cavity is formed which, through a lower plug 26 of the front plate 24, is connected to a hose 28 which extensively projects forwardly through the front tank compartment to a discharge plug 30 on the front end 22 of the tank 2.

10 Nâr stemplet 18 star i den med fuld optrukne linier viste stilling foran de 0vre stutse 4 og 8, vil tanken 2 være anvendelig som en konventionel slamsugertank, som kan opsuge slam gennem slangen 10 under indtryk af det pâ tanken pâtrykte vacuum gennem udsugningsstutsen 4, ligesom 15 det opsugede slam derefter kan borttransporteres til en losseplads og udt0mmes ved àbning af den bageste endebund 16.When the piston 18 is stationary in the fully drawn line position in front of the upper studs 4 and 8, the tank 2 will be usable as a conventional sludge suction tank which can absorb sludge through the hose 10 under the pressure applied to the tank through the suction outlet 4. just as 15 the soaked sludge can then be carried away to a landfill and discharged by opening the rear end floor 16.

Nâr det er 0nskeligt at presse slammet, aktiverer man cy-linderen 20 for tilbagepresning af filterstemplet 18, enten med afspærringsventilerne 12 og 14 lukket eller med sâ 2o lidt slam i tanken, at denne ikke 10ber over gennem stut-sen 8 ved det aftagende volumen, medens stemplet 18 bevæ-ges forbi stutsene 4 og 8. Dog skal naturligvis suget pâ stutsen 4 være bragt til oph0r. Eventuelt kan der pâ tanken være anbragt en 0vre udluftningsventil, som lukker, nâr 25 slammet helt udfylder det bageste tankafsnit. En vis inde-spærret luftmængde vil dog normalt være acceptabel.When it is desirable to squeeze the sludge, the cylinder 20 is de-energized for re-pressing the filter piston 18, either with the shut-off valves 12 and 14 closed or with so little sludge in the tank that it does not pass through the nozzle 8 at the decreasing volume. while the plunger 18 moves past the studs 4 and 8. However, of course, the suction on the plug 4 must be brought to an end. Optionally, an upper vent valve may be provided on the tank which closes when the slurry completely fills the rear tank section. However, some indoor airflow will normally be acceptable.

Under trykopbygningen med filterstemplet 18 vil vand fra slammet trykkes ind gennem filterpladen 22 for indl0b i hulheden i stemplet, hvorfra det udledes gennem slangen 30 28 og stutsen 30, eventuelt ved aktiv udpumpning fra denne. Ved en sâdan udpumpning kan tilvejebringes et under-tryk i stempelhulrummet, hvilket vil fremme indtrængningen af slamvandet gennem filterpladen.During the pressure build-up with the filter piston 18, water from the mud will be forced through the filter plate 22 for inlet into the cavity of the piston, from which it is discharged through the hose 30 28 and the plug 30, possibly by active pumping out thereof. In such a pumping out, an underpressure in the piston cavity can be provided, which will promote the penetration of the sludge water through the filter plate.

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Nâr det konstateres, at selv en lille tilf0rsel af tryk-olie til cylinderen 20 bevirker en stor trykstigning, vil dette betyde, at s laminet nu er vidtgâende afdrænet, idet stemplet herved f.eks. kan indtage den med punkterede li-5 nier viste stilling nær bagenden af tanken, hvor tankrummet nu vil indeholde en prèsset slamkage.When it is found that even a small supply of pressurized oil to the cylinder 20 causes a large increase in pressure, this will mean that the laminate is now extensively drained. can occupy the position shown in broken lines near the back of the tank, where the tank space will now contain a pressed mud cake.

Herefter kan stemplet trækkes fremad, idet der pâ enhver egnet mâde s0rges for, at der samtidigt kan indf0res luft i presserummet, hvadenten det sker gennem slangen 28 eller 10 gennem et særligt luftindtag mellem stemplets for- og bag-side eller endda gennem den faste tankvæg. Nâr stemplet er fremtrukket til sin begyndelsesstilling, kan operationen gentages, sâledes at en st0rre filterkage kan opbygges ved flere operationer.Thereafter, the plunger can be pulled forward, in any suitable way ensuring that air can be simultaneously introduced into the press room, whether through hose 28 or 10 through a special air intake between the front and rear sides of the piston or even through the fixed tank wall. . Once the plunger is advanced to its initial position, the operation can be repeated so that a larger filter cake can be built up in several operations.

15 Nâr filterkagen eller -proppen skal aflæsses, kan dette pâ enkel mâde ske ved, at endebunden 16 âbnes og stemplet 18 aktiveres til udtrykning af det opkoncentrerede slam gennem bagenden af tanken.15 When the filter cake or plug is to be unloaded, this can be done simply by opening the end bottom 16 and the plunger 18 activating the concentrated sludge through the back of the tank.

For den beskrevne funktion kan det være væsentligt, at 2o slamkagen ved returneringen af stemplet ikke blot f0lger med dette, da der derved kan ske en blokering af stutsene 4 og 8. Da slammet er blevet trykket mod filterpladen 22 kan der forekomme en god vedhæftning til perforationerne i pladen, og det kan derfor være n0dvendigt at preparere 25 indersiden af den bageste endebund 16 pâ en sâdan mâde, at der ved presningen af slamkagen opnâs en endnu bedre vedhæftning af denne til endebunden 16. Som vist i fig. 2 kan denne eventuelt hâve en indvendig plade 32, som pâ ikke vist mâde kan være tildannet med holdedele sâsom 30 underskârne spor eller celler til fastholdt optagelse af bagsiden af slamkagen. Pladen 32 kan endda være perforeret, sâledes at rummet i endebunden kan udnyttes til modtagelse og afdræning af vand fra slammet, og herved er det en mu-lighed, at pressepladen 22 ikke beh0ver at være en filter-plade, idet visse typer af slam vil kunne behandles alene 6For the described function, it may be important that the mud cake does not just follow this upon return of the piston, as there may be a blockage of the studs 4 and 8. As the mud has been pressed against the filter plate 22, a good adhesion to the the perforations in the plate, and it may therefore be necessary to prepare the inside of the rear end 16 in such a way that an even better attachment thereof to the end 16 is obtained as shown in FIG. 2, it may optionally have an inner plate 32, which in a manner not shown can be formed with holding parts such as 30 cut grooves or cells for retaining the back of the mud cake. The plate 32 may even be perforated so that the space at the end bottom can be utilized for receiving and draining water from the sludge, and there is a possibility that the pressing plate 22 need not be a filter plate, as certain types of sludge will could be treated alone 6

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ved antrykning mod en fast filterplade ved bagenden af tanken.by pressing against a fixed filter plate at the rear of the tank.

Modsvarende er det en mulighed, at udsugningsstutsen 4 kan placeres bagest pâ tanken 2, sâledes som det er vist i fig.Similarly, there is a possibility that the suction plug 4 can be placed at the back of the tank 2 as shown in FIG.

5 2, hvor ogsâ tilsugningsstutsen 8 er vist anbragt bagest, nemlig 0verst pâ endebunden 16. Nâr den aktuelle slamtype tillader denne anbringelse, nemlig ved at tillade bide luftudsugning og slamindtrædning gennem en allerede delvis opbygget slamkage, vil dette arrangement byde pâ den for-10 del, at presse- eller filterstemplet 18 ikke ved hver operation skal returneres helt til den i fig. 1 viste begyn-delsesstilling, men ved de f0rste operationer kan udgâ fra en stilling væsentligt længere tilbage i tanken, hvilket navnlig er af betydning ved behandling af forholdsvis h0jt =j5 koncentreret slam.5 2, where the suction plug 8 is also shown at the rear, namely at the top of the bottom floor 16. When the current sludge type allows this placement, namely by allowing bite air suction and sludge entry through an already partially constructed sludge cake, this arrangement will offer the pre-10 part, that the press or filter piston 18 does not have to be returned to the operation of FIG. 1, but in the first operations may be from a position substantially further back in the tank, which is particularly important in the treatment of relatively high-concentration concentrated sludge.

Det ved presningen afdrænede vand fra stutsen 30 og/eller fra en tilsvarende stuts pâ bagendebunden 16 kan tilbage-f0res til det milj0, hvorfra slamopsugningen finder sted, eller vandet kan indledes i et særligt afsnit af tanken 20 2, eventuelt endda direkte i tankrummet foran pressestemp- plet 18.The water drained by the pressing from the butt 30 and / or from a corresponding butt on the back end 16 can be returned to the environment from which the sludge suction takes place, or the water can be introduced into a special section of the tank 20 2, possibly even directly in the tank space in front. press stamped 18.

Dette tankrum foran prèssestemplet kan dog ogsâ udnyttes til fremkaldelse af det 0nskede pressetryk pâ stemplet 18, sâledes at cylinderen 20 kan undværes. Nâr der med egnede 25 midler kan indpumpes luft eller fortrinsvis vand i dette tankrum med et passende h0jt tryk, vil dette være tilstræk-keligt til at fremkalde det bagudgâende pressetryk pâ stemplet, og for returneringen af stemplet kan man sâ blot s0rge for, at der modsvarende kan indledes trykluft eller 30 -væske i rummet umiddelbart bag stemplet.However, this tank space in front of the press piston can also be utilized to produce the desired compressive pressure on the piston 18, so that the cylinder 20 can be avoided. When, with suitable means, air or preferably water can be pumped into this tank space at a suitably high pressure, this will be sufficient to induce the backward pressure on the plunger, and for the return of the plunger to be ensured that correspondingly, compressed air or liquid 30 can be introduced into the compartment immediately behind the piston.

Claims

A sludge suction vehicle having a cylindrical sludge tank (2) connected to a vacuum pump and a suction line (10) and having an open end bottom (16) for closing the suction sludge, and of the kind inside the tank (2) 5 is arranged a transversely adjustable displaceable middle wall (18) in the longitudinal direction of the tank, characterized in that the intermediate wall is designed as a pressure piston (18) which is operable to strongly compress the suction amount of mud between this piston (18). ) and the retractable end bottom (16), the piston and / or end bottom being constructed with a filter plate (22/32) facing the sludge in question, through which water is discharged at compression to a drainage space located behind the filter plate, from which the water can be drained further and the plunger (18) is further expressable for extruding the pressed mud cake through the open tank.

Sewage suction vehicle according to claim 1, characterized in that the tank's connecting plug to the vacuum pump and the suction line are located on the half of the tank 2 @ which is opposite to the open end portion.

Sludge vacuum cleaner according to claim 1 or 2, characterized in that the means for exerting pressure on the piston are made up of means for substantially increasing the pressure in the space behind the piston.

4. Sewage suction vehicle according to claim 1 or 2, characterized in that the means for compressing the piston are made up of a pressure cylinder.

Sludge vacuum cleaner according to claim 1, characterized in that the plunger is provided with an inner cavity which is confined to the sludge by a filter plate, possibly with a filter cloth, and that the cavity is connected to a discharge plug at the closed end of the tank. through a VkM-i λ! 1 ΛΓ r * 1 ο n r * r \ ί ί · Κ in Iran DK 156276 B

6. Sludge vacuum cleaner according to claim 1, characterized in that the openable end floor is formed internally with holding parts such as cut grooves or cells to increase the attachment of the pressed mud cake.