NO117675B

NO117675B -

Info

Publication number: NO117675B
Application number: NO0225/68A
Authority: NO
Inventors: A Oekvist; N Nilsmar
Original assignee: Maskin Ab Na Eie
Priority date: 1967-01-26
Filing date: 1968-01-19
Publication date: 1969-09-08
Also published as: DE1627847A1; GB1164952A; US3491682A; AT281868B; FR1561323A

Description

Pressavvanner. Press dewatering.

Foreliggende oppfinnelse henfbrer seg til avvanningsanordninger for slam o.l. og angår spesielt en anordning som arbeider ved hjelp av et presstempel. The present invention relates to dewatering devices for sludge etc. and relates in particular to a device which works by means of a pressing piston.

Det er tidligere kjent slike anordninger hvor et presstempel beveger seg frem og tilbake mot et mottrykksorgan, There are previously known such devices where a pressure piston moves back and forth against a counter-pressure means,

f.eks. en avvanningskjegle. Ved de fleste kjente anordninger utmates det pressete materiale ved hjelp av presstemplet, etterat mottrykks-organet er fort bort eller forbi dette. Ved en sådan anordning skjer komprimeringen normalt i et ikke lukket (sluttet) rom, derved at materialet presses mot avvanningskjeglen og mates ut forbi dennes basis under selve pressarbeidet. Herved oppstår det kanaldannelse og ujevn komprimering av materialet, hvorfor torrheten ikke blir ens-artet tvers gjennom det utmatete materiale. En sådan anordning er således ikke tilfredsstillende, hvis det avvannete materiale skal brennes umiddelbart. e.g. a dewatering cone. With most known devices, the pressed material is discharged by means of the pressing piston, after the counter-pressure means has quickly moved away or past it. With such a device, the compaction normally takes place in a non-closed (closed) space, whereby the material is pressed against the dewatering cone and fed out past its base during the pressing work itself. This results in channel formation and uneven compression of the material, which is why the dryness is not uniform across the discharged material. Such an arrangement is thus not satisfactory if the dewatered material is to be burned immediately.

Foreliggende oppfinnelse tilsikter en forbedret pressavvanner, som kontinuerlig kan gi materiale med meget hby torr-het og som er billig i drift, billig i anskaffelse og krever liten plass. The present invention aims at an improved pressure dewaterer, which can continuously provide material with very high dryness and which is cheap to operate, cheap to acquire and requires little space.

Oppfinnelsen innbefatter et presshus med innmatningstrakt og perforert avvanningssylinder, et presstempel og en mot dette rettet avvanningskjegle samt utmatningsorgan for det avann-ete slam og karakteriseres ved at utmatningsorganet utgjbres av en frem og tilbake bevegelig hylse, forsynt med et antall hull innrettet til å fylles med avvannet slam for å mate ut dette utenfor avvanningssylinderen. The invention includes a press housing with a feed funnel and a perforated dewatering cylinder, a press piston and a dewatering cone directed towards this as well as a discharge means for the dewatered sludge and is characterized by the discharge means being formed by a back and forth moving sleeve, provided with a number of holes designed to be filled with dewatered sludge to feed this outside the dewatering cylinder.

For tbmming av hullene i utmatningshylsen anvendes radialt mot hylsen rettete trykkluftstråler umiddelbart utenfor avvanningssylinderen. To seal the holes in the discharge sleeve, compressed air jets directed radially towards the sleeve are used immediately outside the dewatering cylinder.

Oppfinnelsen vil bli beskrevet nærmere i det fblgende under henvisning til tegningene. Fig. 1 viser et lengdesnittsriss gjennom en utfbringsform for oppfinnelsen:, Fig. 2 viser et tversnitt gjennom utmatnings-hylsenj Fig. 3 viser en annen utfbringsform for oppfinnelsen; Fig. 4 viser et avvanningsaggregat med et antall pressavvannere. Fig. 1 viser en horisontal pressavvanner, som innbefatter et langstrakt presshus 1 forsynt med en vertikal innmatningstrakt 2 og en under denne beliggende horisontal avyannings-sylinder 3, hvis vegger er utformet med en mengde små hull. Avvanningssylinderen 3 er borttagbar for rensning eller utskiftning og er festet til en stbttevegg 12 og en skillevegg 13 i presshuset 1. Ved avvanningsylinderens ene ende er et presstempel 4 ved hjelp av en trykklylinder 10 forskyvbart frem og tilbake og ved avvanningssylinderens motstående ende er en avvanningskjegle 5 stasjonært anordnet ved en andre skillevegg 14 i presshuset. The invention will be described in more detail below with reference to the drawings. Fig. 1 shows a longitudinal section view through an embodiment of the invention: Fig. 2 shows a cross-section through the output sleeve; Fig. 3 shows another embodiment of the invention; Fig. 4 shows a dewatering unit with a number of pressure dewaterers. Fig. 1 shows a horizontal press dewaterer, which includes an elongated press housing 1 provided with a vertical feed funnel 2 and a horizontal de-aeration cylinder 3 located below this, the walls of which are designed with a number of small holes. The dewatering cylinder 3 is removable for cleaning or replacement and is attached to a supporting wall 12 and a partition wall 13 in the press housing 1. At one end of the dewatering cylinder, a press piston 4 is movable back and forth by means of a pressure cylinder 10 and at the opposite end of the dewatering cylinder is a dewatering cone 5 stationary arranged at a second partition wall 14 in the press housing.

Ved samme ende av avvanningssylinderen som avvanningskjeglen 5 er anordnet en utmatningshylse 6, som er forskyvbar et stykke inn i og ut av avvanningssylinderen. Utmatningshylsen 6, som er nærmere vist i fig. 2, er utformet med et antall tett inntil hverandre anordnete, fortrinnsvis avlange utad konende hull 7, hvis lengderetning ligger i radialplan langs hylsens omkrets. Hullene 7 er hensiktsmessig forskudt i forhold til hverandre for effektiv At the same end of the dewatering cylinder as the dewatering cone 5, a discharge sleeve 6 is arranged, which is displaceable a distance into and out of the dewatering cylinder. The output sleeve 6, which is shown in more detail in fig. 2, is designed with a number of closely arranged, preferably oblong, outwardly conical holes 7, the longitudinal direction of which lies in a radial plane along the circumference of the sleeve. The holes 7 are suitably offset in relation to each other for efficiency

.utmatning^av presset materiale. Utmatningshylsens 8 i avvannings- .discharge^of pressed material. The discharge sleeve 8 in the dewatering

sylinderen forskyvbare kant er skråfaset til skrapeegg,innrettet til å skrape bort avsatt slam fra avvanningssylinderens vegg. Umiddelbart innenfor skrapekanten er utmatningshylsen 6 langs omkretsen forsynt med et spor for en tetning for å forhindre at slam presses ut av avvanningssylinderen mellom denne og utmatningshylsen. Dette tetningsspor fylles raskt av slam som bygges opp til en meget effektiv og billig tetning. the cylinder's movable edge is chamfered to form a scraper egg, designed to scrape away deposited sludge from the dewatering cylinder's wall. Immediately inside the scraper edge, the discharge sleeve 6 is provided along its circumference with a groove for a seal to prevent sludge from being forced out of the dewatering cylinder between this and the discharge sleeve. This sealing groove is quickly filled with mud which builds up to a very effective and cheap seal.

Avvanningskjeglens 5 inne i avvanningssylinderen The dewatering cone's 5 inside the dewatering cylinder

3 liggende basisdel er utformet med et tilsvarende tetningsspor, 3 horizontal base part is designed with a corresponding sealing groove,

som sporet i utmatningshylsen, for effektivt å tette mellomrommet mellom utmatningshylsen og avvanningskjeglens basis. as the groove in the discharge sleeve, to effectively seal the space between the discharge sleeve and the base of the dewatering cone.

Avvanningskjeglens 5 utenfor avvanningssylinderen 3 beliggende basisdel er forsynt med et antall radialt utad rettete trykkluftskanaler, betegnet med 9, som retter trykkluft innenifra og utad mot hullene 7 i utmatningshylsen 6 for å blåse hullene rene for utmatet materiale. The base part of the dewatering cone 5 located outside the dewatering cylinder 3 is provided with a number of radially outwardly directed compressed air channels, denoted by 9, which direct compressed air from the inside outwards towards the holes 7 in the discharge sleeve 6 to blow the holes clean of discharged material.

Fra skilleveggen 13 til presshusets motsatte From partition 13 to the press house opposite

ende strekker seg en oppsamlingstrakt 15 for utpresset vann o.l. Mellom skilleveggene 13 og 14 er en utmatningstrakt 16, i hvilken utmatningssylinderen tommer det utmatete materiale ved hjelp av tidligere nevnte trykkluftstråler, hvoretter materialet kan opp-samles på et under nevnte sjakt lbpende transportbånd e.l. end extends a collection funnel 15 for squeezed water etc. Between the partitions 13 and 14 is a discharge hopper 16, in which the discharge cylinder empties the discharged material with the help of previously mentioned compressed air jets, after which the material can be collected on a conveyor belt or the like running below said shaft.

Utmatningssylinderen manbvreres ved hjelp av en ved presshusets motsvarende ende beliggende trykksylinder 11 via en stempelstang 17, og trykkluften for renblåsing av utmatningshylsens hull mates gjennom roret 18 ved skilleveggen 14. The discharge cylinder is operated by means of a pressure cylinder 11 located at the opposite end of the press housing via a piston rod 17, and the compressed air for blowing clean the holes of the discharge sleeve is fed through the rudder 18 at the partition wall 14.

Pressavvanneren ifblge foreliggende oppfinnelse arbeider på fblgende måte: Slammet innmates gjennom trakten 2 til avvanningssylinderen 3, hvoretter trykksylinderen 11 forer frem utmatningshylsen 6 til dens ytterste stilling. Deretter trykkes presstemplet 4 frem mot avvanningskjeglen 5 under sammenpressing av det i avvanningssylinderen 3'værende slam. Skulle det vise seg at det er tilfort for lite slam for at avvanneren skal bli effektiv, så kan selvsagt presstemplet trekkes tilbake inntil ytterligere slam er tilfort, hvoretter det igjen presser frem slammet mot avvanningskjeglen. Denne er utformet med to eller flere konsiteter for bkning av effektiviteten ved avvanningen. Under presstemplets press fylles utmatningshylsens 6 hull 7 med avvannet slam. På grunn av avvanningskjeglens etappeform skjer den stbrste avvanning ved dens mellomste del. The pressure dewaterer according to the present invention works in the following way: The sludge is fed through the funnel 2 to the dewatering cylinder 3, after which the pressure cylinder 11 advances the discharge sleeve 6 to its outermost position. The press piston 4 is then pressed forward against the dewatering cone 5 while compressing the sludge in the dewatering cylinder 3. Should it turn out that too little sludge has been added for the dewaterer to be effective, the pressure piston can of course be retracted until further sludge has been added, after which it again pushes the sludge forward towards the dewatering cone. This is designed with two or more concinities to increase the efficiency of the dewatering. Under the pressure of the press piston, the hole 7 of the discharge sleeve 6 is filled with dewatered sludge. Due to the stage shape of the dewatering cone, the steepest dewatering occurs in its middle part.

Etterat presstemplet har nådd sin ytterste stilling bringes trykksylinderen 11 til å trekke tilbake utmatningshylsen 6, hvis hull 7 er fylt med avvannet slam. Under utmatningshylsens bevegelse utad oker trykket i slammet på grunn av at utmatningshylsen medbringer en del slam, som presses inn i det nærmere avvanningskjeglens basis værende slam, hvorved oppnås meget hoyt avvanningstrykk under en viss tidsperiode. After the press piston has reached its extreme position, the pressure cylinder 11 is brought to retract the discharge sleeve 6, whose hole 7 is filled with dewatered sludge. During the outward movement of the discharge sleeve, the pressure in the sludge increases due to the fact that the discharge sleeve carries some sludge, which is pressed into the sludge that is closer to the base of the dewatering cone, whereby a very high dewatering pressure is achieved during a certain period of time.

Når hullene 7 i utmatningshylsen 6 passerer trykkluftskanalene 9 ved avvanningskjeglens basis utenfor avvanningssylinderen, renses de for det utmatete slam, som faller'ned i utmat-ningssjakten og bortfores. When the holes 7 in the discharge sleeve 6 pass the compressed air channels 9 at the base of the dewatering cone outside the dewatering cylinder, they are cleaned of the discharged sludge, which falls into the discharge chute and is carried away.

Presstemplet kan bli i sin ytterste stilling inntil utmatningssylinderen er helt i sin innerste stilling eller kan trekkes tilbake avhengig av kontinuiteten ved tilfbrsel av nytt slam, slammets tbrr-het og konsistens o.s.v. The press piston can remain in its outermost position until the discharge cylinder is completely in its innermost position or can be retracted depending on the continuity of the supply of new mud, the viscosity and consistency of the mud, etc.

Ved de i fig. 3 og 4 viste utfbringsformer for oppfinnelsen arbeider avvanningspressen vertikalt, hvorved ytterligere plass kan spares. At those in fig. 3 and 4 shown embodiments of the invention, the dewatering press works vertically, whereby further space can be saved.

Fig. 3 viser et lengdesnitt gjennom en vertikal avvanningspresse. I et vertikalt presshus 21eriden ovre ende anordnet en innmatningstrakt 22, som er forbundet med en nedenfor beliggende vertikal avvanningssylinder 23. Ved dennes ovre ende er anordnet et presstempel 24 og ved dens nedre ende en avvanningskjegle 25, omkring hvilken" en utmatningshylse 26 er forskyvbar frem og tilbake i avvanningssylinderen. Fig. 3 shows a longitudinal section through a vertical dewatering press. In a vertical press housing 21, an infeed funnel 22 is arranged at the upper end, which is connected to a vertical dewatering cylinder 23 located below. and back into the dewatering cylinder.

Ved den viste utfbringsform er presstemplet 24 stasjonært mens et aggregat bestående av innmatningstrakten 22, avvanningssylinderen 23, ayvarnlngskjeglen 25 og utmatningshylsen 26 beveger seg oppad og nedad i forhold til presstemplet.Utmatningshylsen 26 arbeider derved i to trinn, et komprimeringstrinn, hvor-under den beveger seg samtidig med de bvrige bevegelige deler oppad, og et fyllingstrinn, da den skyves inn i avvanningssylinderen, hvor-under dens hull fylles med slam. Selvsagt kan utmatningshylsen skyves frem til sin fyliingsstilling forst og deretter bevege seg oppad sammen med de bvrige deler under komprimeringstrinneto In the embodiment shown, the press piston 24 is stationary while an assembly consisting of the feed funnel 22, the dewatering cylinder 23, the eye warning cone 25 and the discharge sleeve 26 moves up and down in relation to the press piston. The discharge sleeve 26 thereby works in two stages, a compression stage, during which it moves simultaneously with the other moving parts upwards, and a filling step, when it is pushed into the dewatering cylinder, where-under its hole is filled with sludge. Of course, the discharge sleeve can be pushed forward to its filling position first and then move upwards together with the other parts during the compression stage two

Etterat pressingen er skjedd beveger hele det bevegelige aggregatet seg nedad til sin nederste stilling, hvoretter utmatningshylsen 26 trekkes ut av avvanningssylinderen og renses for slam ved hjelp av trykkluft, som tilfores gjennom kanaler i avvanningskjeglens basis utenfor avvanringssylinderen. After the pressing has taken place, the entire movable unit moves downwards to its lowest position, after which the discharge sleeve 26 is pulled out of the dewatering cylinder and cleaned of sludge with the help of compressed air, which is supplied through channels in the base of the dewatering cone outside the dewatering cylinder.

Ifblge en annen ikke vist utfbringsform for oppfinnelsen, der det likeledes skjer vertikal pressing,arbeider presstemplet og utmatningshylsen på liknende måte som ved den horisontale pressavvanner. According to another not shown embodiment of the invention, where vertical pressing also takes place, the pressing piston and the discharge sleeve work in a similar way as with the horizontal pressing dewaterer.

Ved å anvende en pressavvanner ifblge fig.3 sparer man omkostningene for hydraulorganene ved presstemplet. Begge disse sistnevnte utfbringsformer egner seg imidlertid ut-merket for sammenbygging til avvanningsaggregatet av det slag som vises i fig» 4, der man anvender sentral innmatning og utmatning og der et antall pressavvannere er plassert i sirkel omkring inn-og utmatningsanordningen. Det dreier seg altså her om et kompakt aggregat med stor kapasitet, der selvsagt ikke alle avvannere må arbeide samtidig, men hvor en eller flere kan stå i reserve. By using a pressure dewaterer according to fig.3, the costs for the hydraulic organs at the press piston are saved. However, both of these latter embodiments are excellently suited for assembly into the dewatering unit of the type shown in Fig. 4, where central infeed and outfeed is used and where a number of pressure dewaterers are placed in a circle around the infeed and outfeed device. It is therefore a compact unit with a large capacity, where of course not all dewaterers have to work at the same time, but where one or more can stand in reserve.

Selvom bare et par utfbringsformer for oppfinnelsen er vist og beskrevet, er det åpenbart at mange ulike modifikasjoner kan tenkes innenfor rammen for oppfinnelsestanken, f. eks. med hensyn til drift, innmatning og utmatning, delenes innbyrdes plassering og bevegelse o.s.v. Although only a couple of embodiments of the invention have been shown and described, it is obvious that many different modifications can be thought of within the scope of the inventive idea, e.g. with regard to operation, input and output, the relative position and movement of the parts, etc.

Claims

1. Pressure dewatering for sludge etc. including a press housing with a feed pipe and perforated dewatering cylinder, press piston and a dewatering cone directed towards this as well as a discharge means for the dewatered sludge, characterized in that the discharge means is produced by a discharge sleeve (6) which moves in and out of the dewatering cylinder (3), which is provided with a number of holes (7) arranged to be filled with dewatered sludge to feed the sludge out of the dewatering cylinder.

2. Pressure dewaterer according to claim 1, characterized in that the holes (7) in the discharge sleeve (6) are elongated and taper outwards and extend in a radial plane close to each other along the circumference.

3. Pressure dewaterer according to claims 1 and 2, characterized in that the edge arranged in the discharge sleeve (6) in the dewatering cylinder (3) is chamfered to form a scraping egg (8) closest to the wall of the dewatering cylinder.

4 Pressure dewatering according to requirements 1-3, characterized in that the holes (7) in the discharge sleeve (6) are offset in relation to each other for more efficient discharge.

5 Pressure dewaterer according to claims 1-4, characterized by compressed air being fed radially towards the discharge sleeve (6) through channels (9) at the base of the dewatering cone (5) immediately outside the dewatering cylinder (3) for emptying the holes (7) in the discharge sleeve for the discharged sludge.

6. Press dewaterer according to claims 1-5, characterized in that the press housing (l) is arranged horizontally and that the press piston (4) and the discharge sleeve (6) are horizontally displaceable in the dewatering cylinder (3) by means of pressure cylinders (lo,li), when feeding of sludge occurs vertically.

7. Press dewaterer according to claims 1-4, characterized in that the press housing (21) is vertical and that the feed hopper (22), the dewatering cylinder (23), the dewatering cone (25) and the discharge cylinder (26) move together to and from a stationary press apple (24) ), the discharge cylinder being arranged to carry out a further movement, namely discharge movement, in relation to the other movable members.

8. Press dewaterer according to claims 1-4, characterized in that the press housing is arranged vertically and that the press piston and the discharge sleeve are vertically displaceable in the dewatering cylinder by means of pressure cylinders, as sludge is fed in vertically through a feed funnel, which is arranged around the press stamp.