DE1594535A1 - Process for cleaning used rolling mill oils - Google Patents

Description

, Dipl.-Ing. Dipl. Oec. publ, 1 C Q / C O C

DIETRICH LEWINSKY I θ »« «

PATENTS MVVALT »

Miiichen-Pasiin, A- ,: it. · -.- '■ ir-Siraße2β2
Telephone 1 81 39

I Dr. Fxpl.

I -.--- r ----- f -ι I Tl

Pennsalt Chemicals Corporation, Three Penn Center Plaea Philadelphia 2, Pennsylvania, 0SA

Procedure for cleaning used whale oils USA priority of 9th Quay 1963 based on the USA patent application

279 098

The invention relates to a method of purification Walawerköl. In particular, the invention relates to Removal of cooling water from the Walswerke, "Traepöl" (traep QiI) and clay of insoluble dirt such as soot, dust, bis-oxide and carbon from Valswerk oil.

In the manufacture of continuous bleohes from steel or For other metals it is customary to "kaitau-roll" a continuous strip of the metal, while rolling it through a series

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▼ on Druokwalsen, whereby each pair of rollers presses the strip into a »longer, dulled sheet. After such a way of working, «an. Manufacture sheet steel with a bead of 0.076mm to 0.102mm, the end product being useful in the manufacture of, for example, "tin" cans. In order to reduce the friction associated with the orphan, to avoid stiffness and heat anaamialung, and to remove oxides and dust, it has become customary to spray the metal that enters the nip of each pair of rollers with an expensive compound lubricating or rolling oil . Among other things, in a so-called "direct application ^N " to cool the operation, the thinner sheet, which emerges from the orphans, is sprayed with large amounts of water.

As the state of the art shows, it has become common Collect the mixture of rolling oil and cooling water in a pit or below the Druokwalsen and convey it to a settling tank, after which the lighter oil is pumped out and the Waisswerk sum renewed use again on clock t. That The settled water has also been reused or in In situations where water is abundant, it has been discarded. It is such a known practice in U.S. Patent 2 HO 289.

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Am toiah © r with such clarification connected "inevitable The problem was that relatively small amounts of tramp oil seeped into the system. frampOl is a nickname for Ul, which both summed up the Bruokwalsenlager, as is also used in the orphans' Druokay relievers. Bas TrampSl, constantly based on BrdOl, finds its way into that WalsOl-Kühlwaseer-Syetem usually by simply draining in the ßrube bsw. among the orphans. Veil it τοπ is low, it has become old in the past the VaIsOl and was sucked off the Valsöl and old sub Vledergebrauch again suggests “Das Traapöl has a dark color itself and in contact with Sohsrcrts etc. in the case of orphans, it becomes unpredictable with everyone darker. The consequence of this is that what is applied with the Valsöl Traapöl on the surface of the manufactured metal sheets, pustules, spots, and imperfections has brought about. Rather, raising the risk of a defective product, the Metallhereteller were forced to do so at frequent intervals Your Walsul completely abusetsen and the system under great Refill costs with fresh oil.

In addition to the contamination with Trampul, this contains VaIsOl after the course of oebrattohs the usual insoluble

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Impurities - Look, dust, egg oxide and carbon · the presence of which should be severely let and avoided. Easily abeetsen and aaa the system ale mud to be removed, indereraeita aind some feat « etoffe fine and ea was mower Praktleoh unattglieh, aie su remove"

Be a feature of the present invention »Remove parts of the trampling and a presence in the Walsttleystem, without excessive Walsul losses, within portable Orenaen keep it low.

Ba iet a further feature of the invention, aua dea whale »» Verkayatea remove fine insoluble substances »welohe eich Aohwer discontinue and what aonat with the orphan to the orphans Burttok turns were

Other features of the invention will be apparent to Paohmann with reference to the following description of an informed application form of the invention with further reference on the drawing “which is an ohematiaohe perspective View of the inventions Terfahrena 1st ·

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Vie soheMatisoh shown in the HLgur, work at the Bleohpresse a number of pairs or booths of susaaoenactors Orphans one after the other on the sheet metal · Each pair of whales can go out a floor or backward whale, which under the sheet metal is stored, and an upper orphan or working method exist, which is countered by a hydraulic pressure piston the lower valse is pressed, over a bruok against that Developing sheet metal between the orphans “The orphans are of course arranged on bearings, which by not soaked means are lubricated · Bas Sohmierul ron den The storage and the hydraulic fluid from the pressurized flasks contain the traapoil source, to which the Brfindung sioh observed · As also aohomatiooh sang in the figure » WaIsUl is sprayed against the sheet »when it hits the Pinch every Walsenpaaree entering. Where the sheet metal from each » Couple exits, cooling water is sprayed.

Underneath the press there is a reohteok-like pit, which is intended to store the used WaIsOl, the Walswerkktthlwaeser, insoluble substances and the Traapöl see below BanneIn, In the actual installation, you have a such pit a sufficient öröeee that it sioh under extends all working parts, of which those mentioned above

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Liquids can fall so that they can effectively this au hem · In.

As shown in the figure, the Gemieoh is made from Walsttl, WaIswerkktthlwasser and SrampQl from the pit su a large one Settling tank (for example with a capacity of about 38,000 liters or 10,000 gallons) and in In this settling tank, what has been collected begins to absorb the specific weight of its various parts. For example, they collect at the bottom of the tank the heavy test substances, so that they can be used as sole lambs can be drained from the system · Above the Sludge in the settling tank is an indefinite amount of cooling water in emulsion with the rolling oil, whereby the The proportion of oil when approaching the top of the sink is greater will. Within the entire emulsion there are fine solids which, owing to their small size, slowly appear absetssn. In laohbarsohaft the upper part of the settling tank what is collected is a layer of whale oil, which doesn’t go with it Cooling water is emulsified

has laohdem one door that collected some time since the beginning (for example, 50 minutes) left undisturbed in the tank ", the centrifugal separation de · Collected in its various

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Components begin and then done continuously will. As shown, liquid is drawn from point A near the bottom of the settling tank, but above it the sole of the lamb, sucked off, passed through a pair of aerators at B to allow the enclosed oasis to escape, and SU a pair of centrifuges C and S arranged in parallel pumped, if necessary or desired, with parts of the sludge waste. This fluidity can, for example, from Oil and 85 ^ water exist.

The centrifuges C and D are similar, and in fact solo, which have a massive beaker with an attachment tube on the circumference and a pair of coaxial ring dams over which the lighter oil and the heavier water emerge. Solohe centrifuges are of the Sharpies Corporation under trade names dam ^N Kozlejeotor ⁿ erhaltlioh. Each of the centrifuges contains Torzugswelse a stack of frustoconical-conical disks, within which the interface between the two liquids oil and water is held in a suitable manner.Thus, the zone with the greatest degree of separation, the disk stack, processes the most difficult part of the stubborn emulsion, breaks it and separates it them into their two components. As shown, the dam outflows from centrifuges C and D are collected together in a water collection tank, which holds the liquid in the outer dam of each machine

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lit and creates a Waeserablaas for the overall system;

/ dam an oil-amaeltank collects the omitted from the inner ring. The location of the flttohe within the Haeohinen G and 3) so controlled, daee dae Let drained water essentially free of Ul while The drained oil has a certain degree of humidity can · In other words, at this stage the process goes wrong more about having an oil-free water than an anhydrous Drain the oil.

Solids and water are emitted from the tubes of centrifuges C and D and are deposited in the one on the right The sludge container shown on the side of the figure is collected and allowed to set down before disposal.

Tom uleasuaeltank will dispose of the liquid as shown Pumped two tanks. The intermediate tank is also from one Punk * E in the Haohbarechaft the upper end of the Absetstanke Drained fed, which Walso1 with a lower örad of water contains than one in the emulsion can be found at the lower point in the settling tank. That of 8 sucked off can beiepielswelse from 15 £ Waeser and 85 * WaIa-Ul exist.

Tom's intermediate tank is made from rolling oil with small amounts of water

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. existing current «u a centrifuge T conducted. In the preferred Aueffflirungsform the invention, the centrifuge F asked the form of a centrifuge with maealTer wall with Ansats * tubes on Itafang and welohem ron a einsigen Ringdanmauelaee the clarified whale oil can be sucked · Xn of the centrifuge 1st also created a Itoteratromanordnung through which the inside A centrifuge of this kind is described in detail in patent application No. 3,047,214. In the door-to-door process, the underflow is created by a return tank, which, as it is, draws in what is released through the aneate tubes of the centrifuge. Bae through the approach pipes Auegelaeeene naturally contains a high proportion of water with some solids and it is this part of the water which, as a Unteretrömune to the Kasohine surttok, turns to meet the needs of the centrifugal pipe - bsw. su cover -umfangsöffnungen without the Sorohgang the lighter tfalsöle au permit * This Kaeenahmen can örenjBfläohe "wipe the wäesrlgen phase and the Wsleölphaee in IAHE the periphery to the centrifuge Bechere lokalieiert aueeerhalb dee Sohelbenstapels without the Oefahr of losing valuable Walsöls to ämn aqueous Ansatsrohrauegang · Bins such a machine, which takes into account the effectiveness of the process in high wetness, is available from the Sharplee Corporation under the trade name »

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required.

The ring outlet from the centrifuge * becomes an a-mI tank for clarified oil fed and sucked to the finish make pure whale oils for the Syate * au · Bs will sur Preeee returned and reapplied to the sheet when it enters each orphan couple.

As shown, the return tank contains an upright, tertiary partition G over which the lightest layer can fall into a separate compartment H. Bas water from the gröaee- TBn Department of Hüokfuhrtanke is not only the centrifuge F zurüokgelielert, au dine the approach pipe, but a part of this water is also returned, the Absetatank at a funct X sur reprocessing, which is preferably swisohen points A and S lies. Because it comes from a point J at a distance above the bottom wall of the steam tank, this water can contain some oil.

The liquid which flows over the partition α is drained off in the vicinity of the bottom wall of compartment H of the return tank. Tuck liquid contains geaäes analysis su Onea large Prosen teats 5raapöl, · "-wi # weloh - obta noticed who camp and the leakage of the hydraulic mim for Preeee due. The Traapölauelasβ not only contains

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a high Proaenteat * dee unwanted Traapöles, but a lot of / a Vsststoffe, welone by the settling tank went "■ TraaptSlauelaes Busaraen sit solids fine OrÖsse &% r elimination are sugeleitet.

The appearance of the »Trartpölö · La AüokiOärtank iet surprising. One would expect that, once ait dea WaIsUl dee VaIaverks! Eight, it could not be severely separated under any circumstances. Se appears jedooh consistently i "Sohvarauelaee the centrifuge t and einr wirkliohen Inet.% Ll & tion of Ausstoes has ext VaIsUl a Oleicngewicfct with only 1 ^ ig & r contamination at TrSJKpöl reached. This small amount of pollution is fully acceptable for the Proseea.

The örunö door the appearance of the old Traupöle the väesrigen outlet from the centrifuge P 1st unknown. It is assumed, however, that the mineral oil-based Traapttl in the Noraierweiee FstttSl containing Walsäl cooling water- ^ iuleion, xelciie nan encounters during the whale, not Iet Ala eise fllpJtaae moves the Traepöl into it to select the finer insoluble substances ia system su besieteen and \ m dim determine what can be considered as a lighter solid phase irtr-iKjIitet. These petroleum phaae, as they are from the WaJzöl-v * '

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differentiates which aioh rerhttlt like an aqueous phase » maintains their identity and moves eioh during the final clarification old out of the water in a junction from VaIsOl *

Sin Valsöl can oil from being overweight τοη to fettbssis there is essentially no petroleum distillate. Ouch rolling oil can consist of an oeaisoh, welohes 50jt one Petroleum distillate with the remainder of a Gemisohes τοη tftttöl such as palm oil and nonionic emulsifier. The bulge gives the mixture the properties of a homogeneous phase. Tramp oil, on the other hand, is stated to be a product petroleum based.

Other explanations for the success of the system are possible. However, it is sufficient to understand that the arrangement according to the invention reduces the amount of tramp oil which sum Rolling mill returns can be kept within acceptable limits. It is equally important that insoluble with the tramp oil Impurities are removed. Otherwise these impurities would return to the whale plant and may affect the quality of the whale product

Of course, the method according to the invention does not work limited to the form of execution shown here, for example. Rather, the skilled person is a variety of τοη Ab-

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changes oven · further · given * Aast · !! · the in the drawing «! Soaped pumps can be used with simple "gravity-working or difficult conveying means, furthermore" one can be used instead of the Parallelae & Trifugei C and 9 tos. Centrifuge of the same or similar type, use Aachen. For the preparation of the aafKng-Hohen SohiQAtung "which, how silted in the Abeetttank takes place," can also be used to simple cycloororrioAtions, atapielsveiee ale a pair in rows ait de "leiohtaualaee, eraten cyclones, usfaeeatiend among the Aualaeeeeae Pressure is supplied to the »sum» wide cyclone with recirculation, which appears at «funkt I in the figure · The Leiohtauelaee from the second centrifuge can consist of the outlet» which can be found at funct λ in the figure »while the bottom outlet of the bottom sole of the settling tank is at the bottom Thus, many changes to the preferred method are possible.

- patent claims -

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Claims (7)

Claims 1.) Procedure for cleaning used Yal »factory oils, which · All impurities in waeeers, solids and fram $ oils (such as defined), characterized in that d & ee man da brewed oil In an Abeet tank collects, dmaa aan from de » Lower Bereloh dee Abaetztanks a dense fraction aside, because the dense traction is entiifagiert to get here a light, oily fraction and a heavier ·, Separate water-containing fraction that Aan the separated oil-containing traction alt a less dense oil and water fraction mixes, welohe from a middle area of the Ah » set »tanks is sucked, and that you have the mixed oil and Waaaerf ration centrifuged to split them into two streams separate, namely into a purified whale oiletroe and a Vasseretrom, which contains the Iraa oils 2.) Method according to claim 1 «characterized by the «Supernatural Sohritt dee feeds · dee streams of water, veloher Contains sludge oils, and from the second centrifugation operation is obtained, to a second settling tank, whereby one des The collected material is allowed to settle and the upper layer, which contains the tramp oils, is τοη dear lower Wassar- • ohioht separates. 009830/1483 3.) sow ferfiteea claim 2, characterized * eiohnet, duf MA Vunt too the lower level in the first mentioned Utility tank surfioltfBhrt. 4) Terfahren according to claim 2 or 7 "by the fact that" en nMkaemtA der awviten 2 "atrifiitl" rop "ration ttas" r from the untvrtn 8olilolit la dl · mentioned · gealaobtt Ql- and Kuhn 5.) Τ · ρΓ · 1ΐΓ · η nmoh Anepraoh 4 _f dmdurob d ··· mui da · e «n« jmt · Va * a * r In di · Z «ntrifue & lton · in Iaob-Hue ·· itaTaiuc ·· surUcdcfttbrt * 6.) T «rf * hr« n naoh d «n Torherg« li «nd« ii AiwprUoh «n _t thereby g« no wage, that ·· emu “in“ Sohl ”fraction, from £ tcoe“ n au · D «iantereten Borelch de · he mentioned Abeetstanlu, with the dense fraction before the first centrifugal operation. 7.) The method according to the preceding speeches is characterized _{by the} fact that an extended centrifuge operation is carried out with alternate centrifuges which work in parallel. 009830/1483 Blank page