DE1536915A1 - Switch-off device for individual filter plates in rotatable disc filters - Google Patents

Description

SMS Samesreuther Müller Schuss GmbH., 6308 Butzbach, loatfach 120

Shut-off device for individual filter plates included rotatable disc filters

The jilr invention concerns a rotatable disc filter with a standing, cylindrical filter housing, one in this mounted hollow shaft and a row of superimposed, each with a Stütagewebe and one above arranged filter mesh equipped circular disks, which are threaded onto the hollow shaft, by spacer rings of larger diameter than the hollow shaft from each other separated and connected to the inside of the hollow shaft via bores arranged in the hollow shaft in such a way that the filtrate along the support fabric in an annular space between Hollow shaft and spacer get and can pass through the holes in the hollow shaft through which it comes out of the Housing is led out

The operation of these known filters is such that first filtered and after completion of the filtration,

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i.e. after there is a sufficiently large cake on the filter cloth or after a corresponding decrease in the filter resistance in such a way that the power drops sharply, the sludge inlet is shut off, the filter is emptied and, after emptying, the hollow shaft with the circular disks secured against rotation is left in JreLur .r offset. ·. ird, ./odurcr. the cake is thrown against the cylindrical inner wall of the 3ehi use and from here. "- ntfer-nt ■ .-, can ground",

:.> It is based on the rubbing, the curtain for evacuation of the trice from the cover. Before the cake is thrown off the filter disks, it is known that the drainage flow, which is greatly delayed towards emptying, is due to the sinking of the liquid level in the housing and as a result of the reduction in the available filter surface by using compressed air However, since the compressed air passes through the cake into the hollow shaft and then into the riltrate line when the upper filter disks are free, impurities can be carried away, the air consumption is very high, an appropriate pressure in the filter housing cannot be maintained and there are disturbances and loads in the piltrate line »

1-1 aη nat has already tried to remedy this disadvantage by sucking off the remaining volume of the filter at the deepest point of the filter housing and using a distributor

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The bottom can flow onto the top filter disc and from here in sequence to all the other underlying filter discs through deflection arrangements, so that the cake is always kept moist. This arrangement is complex because it requires additional equipment and takes up space, since the height of the housing with the same number of rats in view of the additional, upper distributor base and the two disks to be arranged deflecting means considerably reduces, truer, these deflecting means den 3 c ". Ie u: i er catch behin-io: ¹ :! rtV:.; .- ::., x must rotate with the disks, dan: i '~ iie rl- ^ tte zylindri.-.- he The outer wall is not interrupted and, accordingly, the rotor is strongly protruding, as well as offering constructive difficulties.

According to the financial statement, a different approach should therefore be used be found, which consists in the fact that Absperror ^ -ane provided for the filtrate passage openings in the hollow shaft are.

It is now possible, according to the decrease in the Liquid level in the. Filter housing during the emptying process the released filter discs of the 5 mm hollow shaft and in particular shut off from the filtrate line

and thus a passage of compressed air into the hollow shaft to prevent" '

BAD ORfGINAL _ 4 _

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.ie shut-off valves must demgc ^? ::; "ö with η en passage no: 'fnun-" en vcn den liingswisehenruuinon ;;. view of the hollow shaft around ien Ms tan .: ring en der .Jchcil-e i; around iniion space d «" r "ioiil,. hurry to cooperate. 3i <; can at any

great. · (l · r hollow shaft, preferably abor on the inner wallun "cer hollow, / ·? He, so be provided inside, jydooh -is e3 also easily possible, from the iiiiigk ·: ^! · . * r ^j ei te each ,, cheibe forth in each opening a valve insert and else these valves in an appropriate V / to i3ch.-il-.on I. ie - done, '' attitude of the valves can in different ways.. . 80, it is enkbar, electrically, electromagnetically, pneumatically, hydraulically or mechanically actuated by a common ochwimtner, the beisrielöv / else near the eiehäu ^r;. einnenflache can operate the valves uivt be movable by means of stops or the like, S... may also each slice or each passage opening un "3 jeaetr relevant shut-off device on the hollow shaft in the annular space itself associated with a _float; be that / process performs the Schliei in this - arrangement of the turn-off of the released wafers automatically goes on...

Ii'an can also refer to the corresponding above described types, i.e. electrical, electromagnetic, pneumatic, hydraulic or mechanical - preferably but in the last-mentioned way - to operate the shut-off elements from the outside. This then has to take place axially through the storage of the hollow shaft, wherein

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each shut-off device also has a separate actuating device is to be assigned. This can also be done, for example, via Bowden cables and then allows each The shut-off device can be operated independently of the others and of the respective operating status. This arrangement has the additional advantage that in the event of malfunctions, e.g. if a filter fabric breaks and the filter fabric is contaminated as a result Filtrate can be observed through a sight glass switched into the filtrate line, which of the The filter panes have become damaged and then this switch off so that the operation with the remaining disks continues until a suitable break in operation can be.

Such a device can then also be a switching arrangement include, which is switched on when the filter housing is pressed empty and - controlled by a Float, a sight glass or the like. - Switching off the Filter disk from top to bottom in accordance with the drop in the liquid level in the filter housing controls. The switching process can also be done in the way control that the passage of compressed air into the hollow shaft or the filtrate line gives the command t for switching off the next filter disc there.

A simplification can be brought about according to the invention that each shut-off device of a group is assigned by superimposed disks.

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This increases the operational safety and the Reduced effort.

With such an arrangement, but also the above mentioned, it is recommended that the transmission means for the Jretätigun · ^ of the Afcsperrorgane coaxially to the hollow shaft to store. In particular, it is useful to have a to use only one valve rod with which all shut-off devices are firmly united. liese '/ entilstange can either by rotating or axially shifting the individual Operate shut-off devices. In the case of rotating the axis is ea advantageous to provide on this Radialariae or the like, the one adjacent to the inner turn of the hollow shaft, Have shut-off plates in the form of cylindrical segments, which close the corresponding openings. Even With such a uniform hollow shaft, a very large number of switching operations can be mastered and, if necessary, Switch each filter disk separately and independently of the others, especially when you turn to this! an axial movement of the valve rod is added and if you put the shut-off arms at the hollow% elle cäer die Shut-off plates are resiliently suspended on the arms so that they can be guided into the shut-off position, but then remain in this, although the valve rod is rotated or pushed further in the same directions.

In contrast, a further simplification is made in that the valve rod is in the hollow shaft

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1 n.lioh "!;Nr.; Vi = pushable rol'i, r <-r". int, lie Ab; M.-err- (M \ c- "ne from""tini-ri tzen in dt-r ilrh '. we] le and ent:.'ri; heirien ϊ ' ^: ί" πι · η . ei · 7 (nti]: '^ an, -e; ι; i "! ^; vt v.erden an; io. t." ^: in ο (it r Vl] ^ r from the ΛΊ u ~ on i; .> V ^ r ^ ^ eri chißi htun ^ n from above; _nh untnn no zune hear, '.air the ALXN-errcr-ano by Lon Ii .c' · ι; ntc η progressively UCHL ie.?en. -i'j ^ e arrangement- 'i.' \ äu>:.: reap simply ": and 'ον, - stirs a Cri ^ uppcnaVi} ·"". · ϊ1 1 unr the ocheibeiv vrn above n.'icii below , zu: "unuohat. i rd the upper doheibenfru] pe closed off, v; a'hrend the via-i'unt-rl j ·: 'form free bl-icen. Pein; ■ niichi.-ter. ..cha] tviMvar.f: i-blocks the second group of ob «n, while the ones below" i <.? - 'C -: -. ien continue to remain free, let ob. rcte .li'uri ο ..itnier l'rei ^ feben v / ird, jrul: tisch but by the darunto-rlierer.de and locked group also except Petri ^ b pet-et -. 't is, oo dal; the I? -ru .: do not divide jurch. the two obrron jruipen in the lower part of the hollow? .eile fei: .. iv cn '.; a :: n. "This 3or .-: lx; ^r or, -ang now puts itself under 'next' place..

^T J? "To continue to demand a quick evacuation, ka ;: n rr .--. N the lower rilt.-r disc un ■ .jgi. A c ^. ^ R vAs' -. Re ^ ^e: '-: riiberliegeiide zn special -3rupr.e summarize and let it end in a special Hing space of the hollow shaft extending from the cavity of the hollow shaft' is blocked Cffnet one then unt these Itingraun; arrive outside deipcheiben and iir the field of storage. su by Radialbokrungen by a stationary Rinrraum so here can be a drain line for the residual filtrate with a special stopcock provide. L'hese arrangement has the 00981 2/04 AO _8AD

Distribute, aai τιοη during operation this lower : Oh, you can leave it out of service, so there ... ay on her no cake forms.

If the filter door is emptied after the end of the p. This arrangement can also be combined with the previously described one in such a way that there is no separate drainage line and the king space for the lowest disk is connected to the interior of the hollow shaft via a bore which should be sha-iable in the same way as the other shut-off doors. When using a common verification command for all shut-offs ο r. ~ Ane it-; t then warn the circuit as follows: '' i .; During operation, the annular space of the lowest piltern disk is closed off from the interior of the hollow shaft, -.vänrend all the other linear threads of the remaining / filter disks remain open, on the other hand, when the uppermost group of disks is shut off by actuating the valve rod, the annulus of the lowest disk to the hollow shaft interior is at the same time is opened to _e

The invention is explained using an exemplary embodiment, that is reproduced in the drawing «Show here

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Pig. 1 a view e; nea. «Age after the iurfin-dunr ' with '.'sum part aurgeoroehen ·? !!! Filter housing;

Pig ". 2 the storage animal hollow shaft, the." 'Filter discs and the cordon according to Pig. 1 in enlarged: 'te: .n Massiitab and in partial cut;

1 ' ¹ Ig. 3 a modified form of embodiment es- / enübur that according to Mg. 2 in a more extensive but smaller Ijixrα division.

Like '«ag. 1; isplays, i ic: t- in cylindrical Filterrehüure 5 with ebenflächi _t 7em testicular 6 and the lid 7 situated by means of lateral lugs 8 on the Flur'9 means of uprights 10 'The housing is provided with a heating jacket 11, which via a Nozzle 12 is supplied with steam or a similar heating medium, while the condensate or the cooled heating medium is discharged via a support 12., Ird. The pulp is drawn into the lid ... via an inlet connection 1? introduced, there is a backward in the bottom 6;: outlet nozzle 14 ·

In the vessel there is a hollow shaft 15 in a lower larer 16 and an upper bearing 1? stored. She v / ied by one Electric motor 18 driven via a clutch 19 and a transmission cone gear 20 and a v; pus Coupling 21 rotates the hollow shaft.

As FIG. 2 shows, the coupling 21 has a stub shaft 22 connected, the radial thrust bearing 23 in

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uje 16 is caught. Ki: iiusem Vc ^ '. . (. -natural is' ie iiohlv.elle 15 uiirch Cl ^ winde and windward /,> j: * ü- urchwei..un ~ firmly connected.; Jie briefly points or · rn.'ilb de ο .indes aen ..v> i lenutumpfes? 2 a or mohr ·· ro Ra ϊ LaI-bohrunruxi.? - on, -ie in a ..ingkai.al '' {i ^ itic.j ij-tut :: enstüükea '.' 6 and v: iu -: ie3en. Ir. -.- inon ": ^r il ■ tattablaui '.- itut ^ en." ¹ V drive, »ie :: ci.l.veJle is at ^ Jd no'jLv. . v.Ir. -ιηκί'ΐ Ϊι> · λ · is an ;. Lv.ischenatuck 29 Fiela ^ ert, DAU to Aui'iiahr:. · · is of i.ichtun ^ c ^ ^f s paCivun 30. Incidentally, also jnt ^ preci'ond in otutser.st'ijk "c" vorreaehon aind. About a b ^ .- ^ ndoreu and also kit. i jr do.-. ^c : r ^; iC-.un "en v-ji 'Kühtii.os i-aor: unfr: 3a iLi'jK 31 is then the lower rlohl.vellenl-a ^^ rung mi ⁴ : J err. GefiüuHebo'len 6 tzv /. His La-'ei'stutsen 32 by 3chruuben united.

Au; "der:. 'Ohl, ve: ie is ob- rn ^ lb i-> r La ^ srung uri / i Abdi', · :. * .. <r ..- · a y] '-. n.; o ::. '. -: ".-- c rdne t _f :; d ε: em a 7r ^; . ·;) * · ':'; / ^ L vors'j: .rr.ul *. i. ^:: T. hieses trärt-, ine Ji2ht ^ n- :; i. ⁿ .ar: öC ".fj tte ^ 5 u-rrü süir.tlijr.e, au: '- the" onlv.-jlle threaded iilt-.racheiben; 6. r.iese sin 3 slightly ke -'- elstucipfförmlg · born upwards and rr.with a jtützgewece and a - "il tor ge wo be verr; eheno Ilia was, kept at a distance by Lästanzringe 37. In this way .verden between zv; ei überereirianderliorer. -on floors, the liatance rings 37 and the hollow / all 15 liing spaces 3 £ are formed, which are connected via openings 39 with the interior 40 of the hollow v / elle.

Yiie r'iga 1 zei " ¹ *;. Iet in the HOhI- ⁰ IIe 1? A 7-valve rod 38 longitudinally displaceable _s dj.u via a hand-

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■ ~ riff '* i'3 unJ ein ^: o, vden ;; ur 40 ν rjchiehlnr i; _; ··. and their, ie »oil ire Jtellunf an βϊη ·: -ΐ ·; kala 41 ni-r ■, inen:; it tem: inid,: ri ; Γ; "° connected -... i. Yv Ί?!" ■ at. ·.?. * Toü 3t; can be. An ior Ventilstance i: j: in ", '·; ηυία to.il.ur ■' · ', 4.4, 45 (i'ipe) -i't anceoi-'inet, ie i ^ iir. Deflect J ·, r Vc ^ til-3tan _; -e '■ - "iii. Vontils'itzen 46 L ::.:. .17 tsw. 4c rm urr on- ·., Ir-.en, u'v -.var -ierart, .ia ". ^; :".: .- r! --- :. c.-t -er V-: ΐϋ > ^ Γ. lor 4ϊ • e _; -e ^v n; .l ->? r iein V-intiltoller 4o seals and I / u-üt in '• ^Λ ϊ ^. ? .u « ^; il t.-rschciVic-nrruTi] e 4 ⁽ j at; .'- rerrt, v.ilhrond it-im weit.iren ^:.-er.ken der 7-iUil.?'an^e 5-6 the Te .ler 44 pereniiber ien: .jit-s 47 aufcor, ier.-rui pe 49 also no ·; ·: - · Λα .veitcre group 50: Λ cc'i: -ltet. "! ier bei iat 5ev valve disc 43 iViCi; below -uren ^: en valve seat 46 hinirax'h ütreie; .. Me Aboiclitun-: · can about 2: hliuo ::; ie: tun -en egg .v: l. uri ^v l.; en.

Ents -.- i ^i. Chi - ";i; os e.ril * ⁰ ^ i ö ^he lets th I hase t'ür ο on valve disc 45 '-' fnilb-.r of ^ ichtunr 48 bes' -f-lich a lower group ^ e ^ 1.

; τθΐηαϊ2 der. '• .uiführunf-sform after .-' ig. 2 ict below the lowermost liir.rsltses 48 a pipe 52 is welded, the one Hiugka ::::: ier 53 for the lowermost sieve bottom: 6 forms _o ") hese are located immediately above the floor of the β FIIT." Rgehäuses and empty via I-ohrunren 54 into the -lingkanmer 53. From here the residual filtrate passes through a bore 55 and a fixed and sealed annulus ^l } -6 into a remaining connection 57. This line is shut off during operation, so that you can lower filter discs 36 who have favourited a special group 58 sur

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form the remainder, exclusively for this one Are reserved for the purpose and allow quick emptying.

^ Zt valve stem "JB is guided according to FIG. 3 via a guide plate 59 with an annular seal 60 and at the lower end via a guide disk 61 connected to the hollow shaft.

! laugh i'ig. 3 is the annular chamber 53 according to FIG. 2 by a Sleeve 62 is formed, which via radial wings 63 with the hollow shaft connected is. The upper edge of this sleeve 62 acts in the operating position shown: sealing with the Valve seat 48 together, the lower one with a corresponding one Tentilsitz 64. 'If at the beginning of the emptying process the valve rod 38 is moved, this is first. Ringkarrmer 53 according to FIG. 3, which has no connection with a drain pipe had opened, so that the filter disc soot 58 to: Participates in the emptying process because now the connection to the interior of the hollow shaft is established. This arrangement has the advantage that it a special drain arrangement according to FIG. 2 is not required.

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Claims (7)

Expectations 1. Arrangement of rotatable disc filters for the bjsohleu-. nigen emptying of the slurry, geke η η ζ eic:. π et through in the hollow shaft (15) arranged Absrerror ^r ane (43, .46; 44, 47; 45, 48; 62, 48, 64) for üie u'iltratdurchtritt3Öffnuni ~ s (39). 2. Arrangement according to claim 1, characterized in that dai; every absrerrorran a jruppe (49 »50, 51, 58) of disks arranged one above the other i3t) assigned. 3. arrangement according to claim 1 o.-er 2, g e k e η η - η e i ο h η e t through a coaxial to the hollow shaft (15) stored valve stem-e (3B), the rait "all shut-off rrane (43, 44, 45, 62) test are united. 4. Arrangement according to claim 3, characterized in that the valve rod (36) is mounted so as to be longitudinally displaceable, the shut-off rings of ring seats (46, 47, 48) and corresponding plates (43, 44, 45) on the valve rod (38) are formed and let the distances of the plates from the seats in the direction of displacement from top to bottom increase so that the shut-off devices close progressively from top to bottom. 009812/0440 ^BAD 5 »Ano ^ dnun, - nuch oinerr. · Ίοχ · '.ücjrrüche 1 to 4, r ek e η η s. ijh η et by one or ::. jr.rere lower ocheiben (; '6, Jrur pe 5r) _t -ie in one with a * ibesonder · -. ¹ ! Sequence (5Ί) connected .iir. ~ K'ir. ::. Vr {"/ :) the hollow:; ■ ·.:." .. &. (' ^l } end, 6. Arrangement according to claim -; ■, thereby F ek ■■ η η seijhnetj iai, the t '-. H-njere Rin _f "ka ::; r.er (53) r.it "a special AbI ¹ IUf" Iκ! do. (57) vcrbunjon is, 7. Arrangement according to claim 5 _t £ eke η η ζ eich η et through «in the iiingkanner (57) with the Innenx'au" (40) rrer hollow shaft (15) connecting shut-off device (6.:, Ci, 4b, ^r C4 ), which is firmly connected to the valve punch (i'i) and is arranged in such a way that it is in the center! 43.46) öi'föet » hb 009812 / 0A40