DK201800050A1

DK201800050A1 - Centrifuge and operating method therefor

Info

Publication number: DK201800050A1
Application number: DKPA201800050A
Authority: DK
Inventors: Yuji Sano; Yuusuke Watanabe; Hisashi Okeya
Original assignee: Mitsubishi Heavy Ind Ltd; Japan Engine Corp
Priority date: 2015-07-31
Filing date: 2018-02-01
Publication date: 2018-02-12
Also published as: WO2017022529A1; DK180120B1; JP5829352B1; CN107921446B; JP2017029919A; CN107921446A; KR102110055B1; KR20180021189A

Abstract

Provided is a centrifuge that, while using a simple configuration, is capable of stabilizing, at a high level, the density of a solid component in waste discharged from a separation chamber of the centrifuge , is capable of reducing the discharge amount of the waste, and is capable of reducing the storage space for the waste. The centrifuge of a separation plate type is provided with a system controller 17 that includes : a memory 17A storing therein a discharge trigger table generated from initial turbidity levels organized into a plurality of groups and a plurality of change in NTU values respectively corresponding to the plurality of groups of initial turbidity levels; and a central processing unit 17B that calculates a discharge reference value at which the solid component S in the separation chamber 15 is to be discharged, on the basis of an initial turbidity level and the change of NTU value corresponding to the initial turbidity level in the discharge trigger table.

Description

DSSCRI'FfiPi

CENTRIFUGE' .RNb »ERbilNG. METH-hD: ThEREFOR

Field (QQQl ]; The present inherition relates; to; a centrifuge used. with ,a. flue: gas- scrubber and·.bn operacbag method therefor and specificelip relates bo. the- centrifuge and the operating.. method therefor .applied1 to a fine: gas· scrubber; used., in a: flue gat scrnfebinip p roe ess for pisset engine s G:f: Par.ins cessets on the like:,

Baei.gr ound .[00:02.] There: ate: strict. environmental regulations about·, flue, gat: from, diesel engines of marine vessels.:/ among others:/ so. as to' strietlt regulate.. discharging SOc and ΝΟχ. contained in.: the tine gas« ¢0 cope: with the: reguiations,/ fine gas: scrubbing: processes here, conventionally been performed by using: fide gas scrubbers, SO rabbi h-g-purpose· water (hereinafter/ ''so^rubber waterHl that eir.Gniat.es in fine gas scrubbers contain particulate maiters: such as unbanned oarbbné: and the- like.. hneerdingly/. the: :paf fisnlafe matters: are: separated, and., removed., from, the scrubber water/, by using a centrifugal separation procedure,, for example:., When a.: centrifugal. force of >a csuiti.iags is applied thereto/· the. particuiate. mattere; acchmuiate as a solid. component in a., part, of -a separation chamber having the: largest: diameter ibereinaf terf '''mafimum. diameter part"); , .hocbrdingi.p/ the solid cbmpbhébt is iffefTSitteutly discharged: to the .outside;/ together·; with the. scrubber water·/, through a .discharge, pert formed in: the maximum, diameter part of the separat ion Chamber;« Because, it· is not-perm:! tied: to directly discard:the scrubber: water containing the. solid .component, into the ocean·,; the scrubber1 water containing,; the Solid, bcmpbnehh isistbred in the .marine vessel as waste.- 10:003] However, because; keeping space for Luggage: and. passengers in marine vessels &a-s? a higher priority/· there' is; not much room for auif icrchtiy .reserving; the space fob storing sych waste. Accordingly, methade for keeping such waste as little as possible: bate, cobventinnally .been sought for,: hot example·* patent1 titefatsre 1 deecrfbes: .a technique· for keeping waste: output froia a .centrifuge as little as possible':, hocordiug to. this: teobnigys, for the pur pote' of .keeping the discharge amount of" watte output from the centrifuge; as little as possible;/ the turbidity: level oh po,st“prO'Oe;ss.in.gf scrubber water scrubbed: by: the centrifuge; is measured by using', a turbidity meter so that, when the' measured; valne, exceeds s’ predetermined threshold; value·/ the: .accumulated. solid component is discharged, as waste,., from the separation1 chamber·, of the-, .centrifuge,· In this banner, ah endeavor it made to reduce: the watte occurring from., the: centrifuge. In other words./ by monitoring the turbidity level of the peat “pro cess rng scrubber 'water processed by the centrifuge* the density or the ambuht; ..gf the. solid component aeenmixLatihg ih: the separat:!o-n chamber of the- centrifuge ie monitored'.. In addition, hateht Imterahure. ! alsø: indicates that it La important: to keep· the amount, dt waste to; a. minimumi Citation: .list Patent Literature 1:00:0-4] :Patent .Literature·: II dayansse. hatIbhgi:

Publication; of Internationa:!. Patent, hpeileation ¥©;· 30 Xd:-50:730:8:

Summary technical ’ Problem [.0005] However, the content rati©;; .Of particulate, matters: such as unbuxned carbons in-: .flue .gas £lncteaf.es depending on the state of a load an the diesel engines of the marine yesoel. Accordingly, the. turbidity level of 'the. scrubber, water also fluctuates,..· in ebber words,: because cite: processing. capability Of: the ebbfriføgb is; at a cehabaht; level, when the density of the solid, component i.p the scrubber water flowing into the centrifuge: if higher:, separation efficiency of: the centrifuge: becomes higher,.: By contrast:» when the: .density e,f fb.e; solid: component; .in hhe. scrubber water flowing into, foe centrifuge: ίο lower,, separation efficiency of the- centr if ugh 'becomes lowet. Consequently,. ths; turbidity level of the: poo.t-prc.eescing: scrubber water processed by 'the centrifuge: fluctuates.

Thus* the turbidity levels do nob necossafiiy correcpond tø:. the density Or the, amount of the' solid ccdbonenf in the separation:, chamber::,, in addition, because, the turbidity let el of the scrubber water flowing Inin the centrifuge fluctuated»: the time peridd ft tikes Before the solid component deeds: to: be discharged, from, the: inside; of the. separat inn chamber also fluctuates,· when: the density of the·:· .solid component in the separation, chamber is; 'high, it, will become difficult id. discharge; the solid, component unless the; solid component is discharged' at· on early stage;.. By contrast,, when the density Of the·: del id .component in the· separation chamber 'is low# 'it is nechshary to wait until the density becomes: 'high enough,,· [00.0.1] According: to the .method described, in Patent Literature: :.1 by which, the cebumuldt i.hg solid, cbmpbhéht is discharged: from the separation chamber as the waste .when the turbidity level of the. post^prccessing: scrubber water processed: ;by the. centrifuge: etceedS·' the predetermined thresh old: valuer .because the. density of the; solid: .component in the waste is not stable:,: problems remain where,, when the. density of the solid, ndmpbneht in the waste it lohery the· amount of waste 'becomes larger, which will require .larger storage space. By aobtrsst,, when; the density of the: solid' competent in the '-waste is higher#, it becomes more: difficult to discharge the solid aomponeht gs waste through the discharge port.

[00073 TO.· solve; the problems described .above, it. is ah object ot the present invention' to, provide·,a centrifuge: and; an operating- method therefor that, .by using a. simple cohf igaraition,# are; bapafeie; of stabiliz-ing-# at a: high-level, the density of the: solid eompohbnt in the, waste discharged from the separation, ,chamber of the, : centrifuge,# are: capable of reducing the discharge-.amormt- of' the, waste,, and' are-capable of reducing the storage· space for the waste,. Solution to Problem [0008] A centrifuge according: to, the- present invention:,: under control of a system .controller#. performs a: separating procecs to separate a solid ,temporent ffob serdfeber water by applying a centrifugal .barge. to: the sgruhber water containing the solid, oomporenb arvj being: supplied: from a: f lue gee scrubber to an inside o.f .a rotating' -separatioh chamber# fufthef measures; a. turbidity level: of bhe: post-processing .scrubber· : water- by a si ng a turbidity meter, and' i b fc ermittéh'fclf discharges the .solid: Component as, waste fibim the separatioh chamber by opening .a, valfe oh a basis pf a. measured value of the turbidity .meter . By using the turbidity meter,· a first turbidity ,ls:ve:.i is:, measured .as an initial, turbidity .lévé.1. with respect· be each of a, pliyaiity' of bodteo. ::of scrubber water that- .are; arranged to .hane mutually-different: turbidity .levels:' In advance#, immediately after the processing is Started oh each of- the bodies of scrubber water, .and when m, tessiff of the .salid component· in the waste discharged from the: separation chamber has. reached a predetermined density level during follbw-hp .processing performed after the initial, turbidity level is. .measured, a. s:aPoi3# turbidity level of each of the. todies, oh scrubber eater discharged iron the separation. chamber is: measured,· on. a heals of the: measured values,· the system. Controller Caiaui.ates a difiOrehde· ΔΝ10 between the Oebdhd: turbidity level and. the initial turbidity: level with respect tn: each of : the plurality: oh bodies: of scrubber water having· the· ddthal.i.y:“di.f.fe:reht· initial. turbidity levele* also classifies' the .initial turbidity levels pf the-plurality :o:f bodies1 of scrubber water haying the· ;®atu:ally^: different initial turbidity .levels in:td: a, plurality of groups according to magnitudes: thereof·#· and; .generates a discharge' trigger' tab la on a. basis: of the: .initial turbidity1 levels organized in the .plurality· of groups: and the, ANtd values respectively cor responding, to the. initial turbidity: levels., and. the System. Controller includes a memory storing., therein the discharge trigger table:,, and a certrsi :proce.ssing .unit that calculates, as: a discharge reference-, value.,· a turbidity level at.: which the solid: cCmpenenf is to be .discharged,. on. a basts· of .an initial turbidity: level of the scrubber water measured by the: turbidity meter :and the: thTU value corresponding to the· initial turbidity level in the discharge trigger table·:.

[0009] Further, the discharge reference; •value is. -a value obtained by adding together· ihe: initial turbidity level and the. tbib value , .[ΟΡΙΟ.]. Further, the solid component in the separation chamber is bi.i;ph urged by gge.hihg the valve :wheh the turbidity level· of, the scrubber water discharged f rom, the coparation .chamber· has. reached, the discharge reference value.

[001.1.]. Further, a, centrifuge: operating: .method for operating;, .a. centrifuge according to.: the present .invention. under control od .3, g ya: ten c o n t miler , performs a. separating process to separate: -a. snild- component from scrubber1 water· by applying a centrifugal force to the scrubber wafer containing the solid component and· being supplied. from V fine gas so rubber, to an inside efts, rotating separation chamber; farther measures e turbidity level of the- poet-precessing scrubber »aber?;by using: a turbidity meter, and1 intermittently discharges the solid;. eemponsut as vas'S from the separation chamber by opening: a valve, on a basis of a, : measured. value e.f the turbidity ./meter.. f her centr.i fuge operating, method includes: .an., operation preparing step performed oh. the. centrifuge, and art operation executing step performed; on the' centrifuge.,.: fhetopo rati on preparing step includes steps of measuring a. first curfoidify level, as an initial turbidity level, fid .respect to: each of a./ plurality: of bodies Of scrubber eater arranged to have /mutually-different turbidity levels., .in advance., immediately after the. processing i s started on- each of the pier,allty of, Codies Of' scrubber Pater having the, mutualiy:“di.fferent tufbidity ley els, .measuring, -a .second, turbidity level of each of the. .plurality of bodies: of , .scrubber water having, the: mutually “biff brent initial· turbidity1 levels1 and: being discharged from the separation chamber,· When. a density of the. solid component in the: waste discharged from: the separation chamber has reached, a predetermined, density level during follow-up processing., performed -after· the initial turbidity .level is measured:, .calculating: .a difference: ΔΝΤϋ between the/ second1 turbidity level and. the initial turbidity level with· respect , .to each, of the plurality of bodies of scrubber water having" the. m||fdaily-different initial turbidity .levelsy classifying the/ /initial, turbidity levels/ of /the plurality ef bodies/ of scrubber water having the1 /mutually-Pif fere fit- initial,· turbidity levels: into. a. plurality ο;£: groups gonording to magnitudes thereof, and .generating a: 'discharge- trigger: table1 an a ..Basis of tie initial ..turbidity levels organised ih 'the plurality: °f groups and the. dNTU values resp’edtiveiy oorraspouding ts: t:h.e initial turbidity levels, and configuring the discharge: trigger. table into, the: system a On broiler,. .and the operation éreodting; step, includes steps· of measuring· an initral turbidity· level %£·.: the scrubber water observed iHraediately· after flie, separating: process ±B]·· performed thereon,· calculating a discharge: reference rainé: used for discharging the, solid cggponent', on a basis of the·· initial turbidity: ledel of' the scrubber pater and the EdiU value corresponding to the; initial turbidity .level, measuring a later turbidity level, of the- scrubber water:, subsequent to the measuring, of the' initial., turbidity ledel, and opening: the: valve when the turbidity level has reached the. discharge .reference valuer [00121 Further,: at the: operation·' preparing· step:, the ΔΜΤυ value, is :se:f.: to a larger value:· when the: initial turbidity level is lower, whereas the ΔϋΓΪΧ value is set to a: smaller· value when the initial turbidity level is. higher·.. [0:01.3] Further, at the operation.::, executing step, a vaiue· obtained by adding together the initial: turbidity' level: and the: ditto value oorrespondihg to She: initial turbidity level, is .Used as the discharge reference.; value:, advantageous· Effects of Invention [00141. .According to the pre.sent: invent ion,·: it Is:: possible to provide·: the. debt .r.if age grid the Operatihg method therafsr that.., by using a, simple: configuration,: aregapable of s tabil icing,, at .a, high level ,· the densit y Of the solid component in: the. baste discharged: ftom the. separation chamber· of: the centr Huge, ate capable of. .reducing:;· the. discharge. amount o£ the waste, grut age capable at reducing: the: -storage space1 tor the: waste,..

Brief Description of Dfawitigs |:0QI5j; FIG.. I. is: a coptigoration .riiagrasroiliestrating. .an embodiment; .of ;a cent rifuge; .of the present. indention.:: applied, to å- e;et udbar v FIG.., '2;: is a: schematic; .drawing; illustrating, a relevant part, of the; -cant rif age illustrated, in FIG,, f ...

Description of Embodiments. £0016j The present intention will, foe expiainedifoelowy on. the basis:,of an embodiment. illustrated. in FIGS, X and. f...

For .aKampTe;,, as: i.linetrated. in FIG. .1,- a cerf.refuge, .10 agcotbihg to the .eMaodittent is oonneeted tfo a flue, gas scrubber 30 via a: .first circulation pipe. 40 ». While; scrubber -watex rest-iting frem a. scrubbing prbees;s: per termed,· bp the fide gas Scrubber 30 Is circulating:; through: the first otroulaflon pipe 40 as prerpr'ocess.ing: pcr.nbfoer wafer; w, a separat ing process is perf armed: oh: part ion, late· mat tara pp the centrifuge 10, sfo that postpyrecesslfg .scrubber water if is returned tb; the .flue geo scrubber 10' via, the first circulation· pipe 40;. as ill. no tea ted; in FIG-;, 1, the; first cirouiafien pipe iO .incladet a. first; pipe 41-and a second pipe· 42: connected to the first pipe 41.· Xh the present embodiment:·,, a eentrifage of: a separation plate: type;' is used at the centrifuge: 10.. Farther., the: flue gas sfortbfoef 30 is connected, to a diesel .engine· SO; via a.second circulation; pigs: iO. the fine gas, se.rabber :30 performs a., scrubbing, process·, bn- flue ..gas output, from, the diesei. engine SO. The. diesei engine St is. fobnfigkred to reduce 'FOy and the; like in combustion gas, an a result of sucking; in,· again,, the flue gas; made: Gleaner1 by the scrubbing proeese. tOfil] hs .illustrated in-: :F.1G1 1., the centrifuge;: TO is provided for- second: pipe: 12 and is' configured to apply a centrifugal:. force. ho. the pre-process J;:ng scrubber water W ©.applied: fcherefe flam the first pipe: .41,. so; at: to: per farm the: Papa fating gracese fa separate. particalafa matters derived from the flee gas; and contained: rrr the sa ebber water W as a- solid; aompahanf ahd to farther retwn.· the slain pott-p rapesstop-' sdtubPet Pater b' to; the flee pas: scrubber 3:0:.: The· ties gas: scrubber .30. ip ..eø.n.ffgured: to. remove' the; part.! cel ate matters: from the flee; pas: ostput. freer the diesel engine 50 via. the scrubber nater Si in this el tuition , in FfOh; 1.,: forwarding· means; shah as a pump to ο1ηρ«1ηηβ the: satubber· water h .and. the .flue gas: la omitted from;: the. drawing. :Farther, in the· following sections, the scrubber water supplied from. the flee, has scrubber 30 c© the: eentrifnge 1..0.. wi.l.i he. referred, to; as pre-processing sarnhbe.r water W..· The ole-an sfeubhef· water·. W* resulting from1 the processing: performed by the· centrifuge: IP will be referred, to as p;est-.process lug scrubber water W» [Odli] hs the flee gas scrubber, it i.S; possible: to ube ax)v:: pi various types ox ggftbbers that, are; pphpapt.iphhily and pebliely ;known.. For example, as. for the f lea; .gas scrubber 313 i lie St rated it fl§. 1, the pefep^abssing scrubber 'water d oircuiatxhg it the· .first: Pip# 41 .and the. pdsfc-pro:C:es:sing sarubber water W output. from, the centrifuge 1.0 join each other in the: first pipe: 41., so that; the; joined water is sprayed into the fine gds scrubber 3(1 via a. spray nareie: ..31 agnoeoted ta: the first, pipe 41, so .as; to; aatoh and. remove, .the par tren late matters: ..floating In the fine das therein.. As; the fine gas acrUbber 50', a; scthbbe.r configured, to inj.©e.t:. the scrubber water W mb© a filler and. to. remove, particulate matters by using a: liguid film farmed; on the sarfabe of; the filler, or the life·, fey be- used. [0:010] dent, the centrifuge 10 .according, to the present. embodiment. will fun than .ter :erplaired with reference, to FTGb, 1 end .2,,, To: the; second pipe 22. of the first dircuiatian, pipe 10 for the centrifuge 10,*: a: rampling-purposa pips JQ that sajttpies the- post-proces sing scrubber water : WT is connected:, The sadpTing-pniposs. pipe 7Θ. Is, provided, with, a:n; Mr separator 7.1 that performs a bubble removing.’ ptooesa on the post-processing scrubber pater vFl .Further^ on the; downstream: side of the aim separator 7.1 for the samp] in··;-purpose -pipe 70*· a turbidity meter 7.2 la provided. Accordingly, after· the air. separator: 71. has; .removed .babbies; from the: po,st“prooas,s.in.g scrubber water If , the turbidity meter 7:2 is: able. to. measure, the turbidity levei of, the post-processing scrubber water W7 with a| .high level of precision. The turbidity meter 72, :deteoto the turbidity level aa .an analog: signal, so that, the analog .signal :i,s. converted into a digital Signal bp :a system. cbhtrbiier 17u When, the: turbidity lever reaches a certain: value: te.-gi, the 'discharge, reference value:” explained later),,, the: system oontrolier 17 transmits a signal, to a. va;lve, opanldg; add closing mechanism, so as, to, open a, die.,charge: port ob the centrifugs: 10, to discharge.a solid component as waste together' with the. scrubber:, water;, and., to have the:· waste aecnmixXated In a epliediion tank t:0. Whan the waste stored, in the col beet.ion tank id has reached., a predetermined., amount.,, the, .waste: is transferred to, .another "storage1 location, sid a pump hi. 10.020’.], further,: :as iliusiratedlin F1.S.« 2, for example./ the. centrifuge 10. includes,;, an inflow pipe ii into· which the, .flew of the pfe-prCGessihg scrubber 'water W Outpht From: the: flue gas nerubbec 3Q enters; a rotating drum, .(net Illustrated) .of which the, upper end,, la open; a. rotating member lid 12 that forms a rotating. member as being, fitted to the iipper-end opening, of the .rotating dram; a partition plate 13 arranged tao. have. a. gap with, respect to the. inner, surface of the rotating member lid: IE-;: a: main, waive· .1:.4 float opens anci closes the discharge port: .(hot: illustrated): formed In a lateral part; of. the rotating, dram by moving la up-and-down directions at: indidafed by the.· arrow: while being inserted in the rotating dram; a separation.: chamber 13 formed between the main· yglve li. and the: partition. plate; 13:1 and a: pier a lit y of separat ion: plates: Id that are arranged in the separation chamber .15 so: as:: to be; iayeradon top of ore another while: having, .predetermined intervals;: therebetween, in: the: up-and-down. direction-:« dnder control of . the dyafem. oehtrelier 17, the. .pce-prece'seing scrubber water W is supplied: frob. the; inflow pipe' .11 ip the. inside: of the separation: chamber .13 via. a., guiding: tube 18;,

Because the. parfieniate matters, have a. larger spedr io gravity: than that of the Scrubber wafer, when, a centrifugal force Is. applied within the; reparation chamber 15, the pert ion late matters are separated: from the: scrubber water: as a. solid component. S, by: the separatio.n plated 16 as a; result of: bdntfifugatldh:, the pb:st”pfdpé.s.s:ing scrubber water W1 in- the: separat!dp chamber 15 is. .discharged to the-outside1 via a centripetal pump IB had; Sri .outflow pipe 10.., in fib:,:. 1# the post-processing sOrhhber water vf' is: |.h the regions indicated with lighter hatching, whereas· the solid: component: ,s is in the regions indicated with, darker hatching 10.02.1.].. further,: in the separation chamber 1.3, when, the .particulate, matters: are separated from the post-processing; scrubber -water W' a.s the. solid tompbneut S as a result of. the; centrifugation, the solid: component $: ace nmol a tee in a recessed part including the. discharge port:·, (not illustrated:): formed· in the-mahiimlm diameter part bf: the separat ion chamber IS.,. An interface. I is. formed between the.:. gout-pro ces si ug scrubber water ;w*' and the solid; comg:ouent. .8.., Farther* a: very" small .part 0:1 feta soil'd component S positioned at "the interface: I mooes: lii the direction of the arrow,, along with, the flow or .the·, postprocessing scrubber w:ater.W', so as.: to be discharged, to the: outside through the: outflow. pipe 2b> While· .feeing: in a turbid state as being mlwed: in the: post^proeeasing: scrubber water W,:l .it is possible to: measure ;ths turbidity layel o# the: poo[.-processing scrubber water W bp using a turbidity:, met· er,. 1012 2.] The centripetal pugg 1¾ .is disposed. so; as to face, the:·, .interior of a rhomber .2:3· formed, at. an upper' end. of the· partition plate. 13, The' centripetal pump· 131 is configured to: : discharge. the post-processing: scrubber, -water S’ that has. ererf lowed from the. separat ion chamber 15- : and. fa accumulating In the bhamber :23 , /Because- the interface 1 between the/ Solid. component. $ and. the post-processing · scrubber water W advances toward: the denter of the· separation chamber· lb .owes the Gdursa .of time., it becomes:· necessary to discharge the; ..gelid: ocbpohent: 3 .from, the separation chamber .15. As a result of opening the; d i srna rge port formed.: .in the.:: lateral, part of the rotating; drum, the .sotid compohent ..© la discharged, as wastes together with, a part, of: thecpost-procesarng scrubberwater: W* 'held in the separ at ion. chamber 15.. When the?: density oil the: solid1 component :$ in. the waste is lew.,; the amount of waste increases;. Bp contrast:., when the: density eft the. solid· component S is high, it in difficult. to discharge the solid component S: through the discharge port.· Accordingly;, when operating the; 'centrifuge 10* i.t, is: important to discharge the solid, dompenent d without fail by. stabilising the density Of the- solid component -8 at a predetermined density level . To cope with. this, .situation:, in the present embodiment^ a. trigger (hereinafter,. ”a discharge. trigger"| by which the, discharge port of the .separation chamber id is,: opened is set IP advance as appropriate, ih achordanos with fluctuation, of the. turbidity Isyel of the;· tte^proeesBing, scrubber water 1,. lith this, arrangement.:, it it pons ibis be discharge a minimum .amount of Watte without- fail, by’ stabilising the density of the solid, .component ip. the waste..: 10023.1,. An operating method.of the ceataifuge: according·1 to the present embodiment includes; as operation preparing step of preparing, various-: types. g:f. data necessary for the;: operation:, ouch: as:'initial turbiditylevels.;- and an, operation: steshtihg step Of. .etecutihg the operation1 by using ihe: data obtained at’ the opbrafion: prepacihg -Si-ep.: ft the operation preparing step, the: discharge trigger is sot. by performing, the foil-owing procedure,; to sat. the discharge1 trigger, a plurality oh bodies Ofscrubber- Water haying mutualIy-diffsbent turbidity levels are prepared, east as pre-processing scrubber water Wh One or the bodies di -.pre-process ing scrubber water W: pr:ebar.ed it advance and having a certain turbidity1 level is brought subject to a separating process, to separate the- solid1 component.· therefrom. by using:- the eshtiifuge: 10 „ The. turbidity level of thé body- of pod--t--p:fdceo:si:-n-g adfhhbdr waief vf' is-’' measured immediatsiy -after, the processing: is started,. In the, present: invention, the turbidity ’level measured, immediately' after the proces sa hg is shafted is. defined as an "initial, turbidity1- level" During the operation of the, centrifuge, dø, the. .initial, turbidity level, of the body of. post-processing scrubber Water vd having the certain turbidity level is measured. by using the: turbidity meter 72. Port hex*, at an: appropriate: time during tbiiow-np processing performed subsequently, the turbidity level of the: postprocessing scrubber water·· Wf’ is measured as. appropriate, and immediately after that, the solid component Stis discharged, as waste, front the separate oh, .chamber· 1δ together with the post-processing scrilbber: water b’ , aid also., the:. density of the- solid. cgjnpojVBh.t; in .the waste Us: measured,; The timing· with -which: the, trrMdify level of the: pc bt~prose being: scxhbber water. W"’ is. med® firede i® varied at appropriate,. so. that the. measured1 density valne fan, analysis calrai of: the solid component in the waste: at a certain tide reaches a predetermined density· level (mg-..·,, 7 wfi) ,: fie. .turbidity level if ths: p.opf-prpoeadin.g. scrubber water at the certain. time .is : measured by- u:slng: the torpidity meter 72: aid is. recorded,, The difference:· between-the. fnrbidity' level o 1 the, post-processing scribber water WJ .and the: initial, turbidity level, .corresponding· to, the· time when, the density of the .solid, component in the. waste-. riache® the predetermined density .level fT wtil id defined as :å; turfcidi ty difference (AHiU) ,.

[iff4]: The initial tnrb.id.ify level varies among, the bodies of pre-processing scrubber: water: W flowing: into the: centrifuge 10. .hecordingly, with r espe et to· bach of the: plurality of bodies of pre-processing .sdrubbeb watef :W that are. arranged., to: have, fie .mnfnally-different tfirhldity levels in advance>. » ΛΗΤΟ vaisa is· cal.mala.ted and .recorded, from the difference: between the- initial density: thereof: and: the later tnfpidity level ®f the. body Pf .post-ptoce.ssihg sorubfeer wate.r W ! corresponding to- the: time:' when: the density of the solid· component in. fie waste1 reaches-: the: predetermined density' level (7 w.t%) . The ebOvementiOhed. predetermined density- level of the, so.lid component in ihe wasfe canibe changed, as appropriate: depending on operation: conditions-, In this manner,: for example., a discharge trigger table 11,1 not rated, in, Tabie: ,1 is· generated by ealceiatiby: the initial turbidity levels- of the. plurality of bodies of pre-processing scrubber water W having the· mutualiy-different turbidity levels and thd: respective bodies of post-processing scrubber water W’,· and dorréspbhbing AbTIJ values: thereof .- 100251 As illustrated: bn. -Table;. 1.,. the' initial, turbidity levels or the plurality o-f bodied of pte-pro'eessing scrubber water. W tbit ere arranged; iri advare© to be mutually different: are measured in the range pi 0. to 3.,000, for .example:. Within, this: range, the, initial turbidity levels are: divided: into sect ions, by .increments of. :2Q.8,., tor example, so -that the. range, of the; initial, turbidity .leyels; is: .divided into: a plurality of groups ouch as Q: to J00’.,. 20.1. fed lot., . , .. and :.2, -8:01 to. 3,.001):, The total range:,· o.f tEo: initial: turbidity levels: and. tiielhUmber of groups,· thereof can- be set, .as appropriate, .on. the basis: of, the. ope rat. ion environment, such .as an: expected turbidity level of the pre— pfbeesniny,: scrubber water: W, specificatiphn: (a measurable· range, errors)' of the turbidity meter 72, .and, the: ,11 be.,, As, 1,1,1 not rated, in Table 1., in the present embodiment., the plurality' ,d£ groups obtained by dividing the range of initial, turbidity levels. ,by:: increments o.f: 20.0 are written,: in: tbé top section; of the table., whereas EtlTb Valnes, corresponding to: the. groups pi initial turbidity1 levels: are; written in the bottom., section bf- the, table, in the:· present, embodiment,, Table 1. generated in this manner i:s defined. 4® the. discharge trigger table. The discharge:: trigger table' is prepared, in advance at: the operation preparing step on. the: basis· et measured data such as. the turbidity, levels, and is configured, into the system, eontr0.1.1 e,r 17.

[002 6]

I OS 2 7] The discharge trigger table generated a:s

Illustrated. in Table 1 is. stored into S ;mefaoty 17Ά of the system centnerler 17 ip advance and: is. used: at .the·, operation exesatiag step at. the operating yme.thbd: for operating tie geptrxfage· 10 .according'to the present embodiment * An operator: refers- to;, the discharge, trigger: table it lust: ra. ted .as fab it 1-.. Fbr: 'example:,, when: an. initial., torpidity·. level isribwer, the oberater determines that the-amount of the solid. .component b aocumuXating· at the· recessed part in: the separation chamber- IS i.:S smaller and: arranges a larger ΔΜΤϋ value- ip .be assigned:, in the- system controller 17, By .contrast.,,., when, the initial turbidity level is higher, the operator determines that the amount oh the solid component... t at the recessed.: part., in. the.: separation chamber· IS ie larger and: -a,Sr an,gen a smaller ΔΜ.Τ0' value to be. assigned., in the. system controlier 17:., tOOahi When implementing the operating method bn; the centrifuge:, the operator1 measures the initial tarbidity level of the post-processing scrubber water ¥*„ either immediately after the .operation o.f the Centrifuge 1-0 lb started or immediately after the solid bOmponeh.t S is discharged from the. centrifuge IQ:.. buhs.e-queabJy, the operator selects .a: turbidity- difference: value AhTU corresponding to the: measured.: .initial turbidity level from the dxboharge trigger table stored in the. modify 171' dt the system, cent roller 17. The operat:ør calculates a: discharge: reference: value: fv the initial turbidity level a turbidity' diffexence value: AbTb) for. the solid, component S:.,: by': using th.e: initial turbidity level add the. turbidity difference, value ΔΒΤίΙ, more specif i.dairy by adding the ΔΡΤΡ value td the; initial, turbidity level, via a- central processing uu.it lib of the system controller 17... Utter that, the: operator GQ.ilfigures; the biscbafge reference. vallie into the system: GSRtifllex 17.. Daring the. .operation of tire:, ren hr if age XQ the system: cdntrqiXer 17 automatically controls: the: timing: with which., a waive, opening aha. Closing me chan ism 27 opens and closes, on the basis ofresult's of comparing the discharge meference. vales with measured values of: the turbidity .meter 72 , .When the measured value - of the.·· turbidity meter: 72· ba,s, reached the: -discharge reference: value, the : system: central let 1.7 outputs at: open signal to the- valve-opening. and elas.ing ire-oh a hi Sm: 21» Open .receipt: of. the open sighs!, the. valve opening -and; closing gyeh-anism. 25- opens .a, predetermined valve (net. illustrated), s©:·. an to. supply open-valve epexation water) to move the main valve 14 downward to open- the discharge port of the separation chamber 15, and to.vdischsxge the: accumulated· gelid' component S: towar d: the col lection, tank tø.» Si-tet that, the -valve is; closed to" stop the, openavalvé operation: water . Sobse-quahhly, the. valve: (got illustrated) operates according. to- a close. .signal to supply close-waive;:, opera Sion, water, and the main valve. 14 l.s: closed hi step the .close-' valve operation water, (.0029:1: .Mest, the operating1 method,· tor operating: the centrifuge 10 sccerbing he: the present embodiment: will, be: explained:. :(0.030.1, hirst, when flue; gas of the diesel, engine .50 flows Into: the flue, gas scrubber 3b via: an, outbound pipe· Olof the second: cifchiationuipipe 00, the sorubber wathr in the; fine pus mc-rubber 3,Q. .becomes, turbid due: to unburned particulate, matters In the flue gas; missing into the. scrubber 'Water·, While the· :pre:-.prbcess:ihg: scrubber .water W Output from, the flue gas. s:qrubber 30 -circulates through the first 41 of the··' first. rircwiaiion pipe: 4:-0.,. a; .pert of the scrubber eater W is: supplied: to; the centrifuge deVito 1.0 via the. second' pipe it . Ip the. centrifuge i.Cl, the preprocessing seiuiabei;· water If is introduced he the' inside of the separation chamber 15 via the inflow: pipe .11 and. the goiping; tube 18: or the dehtrifiuge If), &f; this time, because the: rotating· dram: ef' the. oentrifuge; 10 ip .rotating, at a high .speed, a: ©entr 1 hagai force is applied to. the preprocessing scrubber· water W- flowing; .into; the separation chamber 1.5,: so that, the part icuighermathers;.-are separated' and:. accumulate in: the recessed, part at the: mawxmum: diameter· part in the- separation chamber 15, as the solid DompPhert :-3.. (see: 'FIG:. )2:).,, The., post-preeessihgiocriiober1 water if' f rom, which the. particulate matters have: been separated. ,inc.reases, gradual Ijw flows: toward, the. behte-r. :o:f the- separation chamber IS, end reaches a .chamber. 23... The: pdøt-p.ro0essing:; scrubber water W) in... the Chamber 2:3 f lows to the; outside: through: the outflow: pipe 35 due to the operation of.. the centripetal, pump ISC The pdst:-proo:e:ss;ind. scrubber water W·' output fromt: the oh:t.flow pipe:; bh goer through·.· the second pipe. 42 and joins.:, in the- first pipe if., the pre-processing scrubber· water W .output f rom: the flue gas Scrubber: :30 and thus iiturhs to the .fide. ga;s aftrobber d:P> 1.0.0:31:]' -The post-pxo.cess.ing·" scrubber water b! output from thS: centrifuge 10 is aampied at a flow rate of 3 admin., for eaa'mpi.e.., via the sampling-purpcse pipe 78: provided: for the second pipe 4.3,,. The sampled water-gee.® through the sir separator 71, where bubblea are removed therefrom... An initial turbidity level of the sampled Water from: which: the: bubbles have been removed is measured:by the turbidity meter 7.2:, The sampled water- of which the- initial turbidity level has been measured is .discharged inti a predetermined tank (not illustrated) . The wafer· noo.umulati.ng in the tank returns: tø; the :flue.: ©s© serubber 30 vig the;. first pipe i!., .[0.032] As the; centrifugation on. tis® pr e-pro. ces® lug scrubber water W: pr og råb ses, the interface. .1 between., the splid cssipsnent i and the:. .post-processing seriibbex watsr Wf in the sepafatich chamber. l.S gradually advances: toward the, center of the separation: chaibdr 15,. during· this tide .period also,, a email, portion of the; sslil .component :S positioned at the .interface. X floats, off as: parti On late matters and .is discharged- to. the d«t&i'd3k# aociompauyihg the: flow of the post-prccesslrg. .©ο-rubber:· water W:,: , .[0013] In. a while, as: the aooumuisteh: amount of .solid: component --S· 1 her eases.,: the- turbidity level. of the post'd preessBihgi scrubber water -Ml increases to] .reach the, discharge, .referenda: value,, At this. time., the valve::, opening and, closing mechanism 25: is. driven-1 by an Open .signs:! Output from the System controller 12.,- so; as to: open the valve and forwards the open-valve. operation water to; the main; valve; if;, and the main valve 1,4, is- thus opened,, ha a result;, the-discharge port of' the .separatfon chamber 1-5;' is opened, so-that, the accumulating solid compehent 8 Is diecharged together with . the- 'pos:.t-p:reeeH.s:ing. .scrulhB&rtwater tT’ and is, collected in the eolieefcion bath SO, -Stthseqnehfcly,: the supply of the open-valve, operation water· is' stopped. After that., the valve is opened due to; a'elgs-e signal from the system controller 12, and the close1 operation Water is forwarded so as to close thé Mai.fi: valve. 14, ghd the. .valve is eiosed: so as to atop; the supply- of the close-valve op.erat 1 on. wafer.. ;fΟ034] The discharge reference. value is set by adding together the initial, turbidity level, and the. 'turbidity dif ferehc®; ,ίρτϋ>· as. efplal ned, above. When, the initial turbidity level isihlgher, a. .smaller' turbidity difference, ..AhTU is s;ef., by contrast, when the; initial, turbidity level. is lower, :§ large χ· tu;rb:ld;i ty difference: APSU; 1$: ©dig. 1¾. otter words,- by setting; the turbidity dif ferencs ΛΪ0® tg: ad appropriate;· value. varied id. go-cprdance with. the- initial turbidity level of the positpr© é:é s s -in g scrubber hafer s?J * it is possible t.o rl.sbi1J.ro tic density of the solid; component S in the waste di.acharg.ed: from the centrifuge If at; the predetermined density level .(7 wt.% In the 'present, dthcdimdht.) .: Adderdingly, ip la· eooelble' to reduce the: storage space 'for the waste.

[0035] As explained above*; the present· enhodirøent;. provides, the centrifuge 10 that* under the: control of the; ay stem. controller 17, per forms tho:. eepa rating process on the; solid component S in the scrubber water· vf by; applying; the:·. :c:ehtrifuga 1 force.:,; Ιη the separation chamber- 15,. to the;· pre-processihb scrubber water W supplied from the fide gas scrubber 35 to the; inside ;:o;i the centrifuge; 15y, further me as-ures; the turbidity level of the. po-stp £ ©cess ing scrubber water W! by using; the turbidity meter 72 while the :pcpt~prDC.e:ssin:g scrubber wafer W.·* JO returning from; the. separation chamber .15 to: the fine, gas scrubber 3.5., and intermittently discharges; the solid ecmpdheht S' from the: ix):side el the .separation chamber: IS by bringing: the valve, opening and closing mechanism 25: into operation on the basis of: the· measured; value:. By: using the turbidity meter; 72the first turbidity level is measured .a® the: initial tarhidity level with, .respect, to. each., of the; plurality ox. bodies1 of pre-processrng acrubber water that: are arranged to have the; mutually~diffetérif fcnrbfdify: Ibve.lb. in: advahc a,. immediately after the processing; is; started on each of the, bodies of pre-'p:f:oee;Ssihg scrubber - Water W,. Aiscn when the density of the solid eemponehS S in- the 'waste discharged from; the: separation. :cbambor IS has renched' the predetermined density level during.: the fol l:e:w:-up processing; performed. aides the; initial, t-urPidity level, in measured*, the: second turbidity· dedal of each. id! the: bodies1 oftpcBt;--procesding sbruhber:: later VP ib measured.. fbrtber,- the system. Controller 17 calculates· the: biff οτύηόή. ΛΜ’ΓΠ between the second. turb-idi hy level of e-abb· .si the; bodies: of postr-processing .scrubber pater ..W* add the. initial turbidity level, With ::raspeet to each of the· bluraliby’ af bodies of scrubber pater d haring tie mutually:-dift.eraad turbidity level;®,, .M-sq,. the: eastern: controller 17 class! fret: the: initial turbidity :levels, o.f the plurality· a;f bodies11 of scrubbed- paler li .'davids tire mutual lp~dilleren.d turbidity: levels info tha plurality .-of groups in the; .order, af' the magnitudes thereof., -add generates, the discharge: trigger fable on the, bas:!® ..of bhe; initial turbidity levels-organ if fed; id the: plurality of groups add the AFiO values re s pe c tlyely corre spo ndi. n.g; to the 1 n 111 a 1 turbid 1.1 y . lev els. In addition-, the: system sent roil fee. 17 includes i the. memory·: 17A: storing therein- the diso:harge: trigger- table:; and tile uenfral. .procéiss-ing unit 17¾ that calculates, the. discharge; refedenoe. value used, lor .disbdargiag the solid component: S': f rom: the: inside of the separation .chamber io„ on: the basis 0:f; the initial turbidity; l-acsi and the AHTIJ Value; cobrespanding to the:: initial turbidity level in. the discharge- trigger- table-.. Accordingly, at. the operation preparing: step, the: discharge trigger table:- .Id generated;, and the disaharge reference value 'based On the qisbhgrge; 1 rigger table Ιο calculated,· Further;,, at: the operation executing1 step.,, the: turbidity level;® of the post pgr ocsssiny1· scrubber water It* output f;fom the centrifuge 10' are· seguentialfp measured, so. as to discharge· the solid component ;S accumulating in the separation·: akambfe-r. 15 :at the time when the: turbidity .level .has reached the- disaharge reference value..,, these arrangements,: by ping the simple conf iguratibn, it is possible: to stabiles:®1 th® density of the Collet component S; ih the ©apt« dlschafgeh. from, the' centrifuge. lu at the predetermined: density leyel (7 wbt in the present emfebdimebtd * Consequently, it Is posåibt®: to reduce the discterpetamottt of the Waste and; to alee reduce the storage space for- the waste,, IQ03.6.1... Further, because1, the s,ystem iCentroiler .17' hae the. dischargé; trigger table, by Oimpiy measuring the ihit:ial tnrbidity level of the post “processing scrubber water W* while risking th® turbidity meter 72, it is possible to set bh«: discharge reference value by selecting" an. appropriate· ΔΐίΤϊΐ value: ootrespondinc fee. the measured: Initial turbidity levelfrom.: within the discharge' trigger table..

Consequentiyr .ife is: .possible to, stably control the density of: the solid, cooponieut .S. in the waste :at: the p.redete.mined. density level, further, ilia economical because· the centrifuge: 10 Is. sufficiently structured with, the; simple; system o o nf igurat1οn, 1.0837] The present invention .1 s :hot:, by: any means,: limited to; the eitbodimehtO decof Ibed appye.;, ha long at: there is no: confiict„ with the gist.· of the; invention·: of the; present application, it is possible· to apply design changes" thereto as appropriate., when hecebsafy:.:

Re fere nee · S ign & L i s fc.

[0038] 10 FEbTEIFOSE ii. idFtow fife: 12 [ROThilHS; MEMSER Xlh: 1.4 ,ΜΔ1Μ hh.LFE: (ΧΔΙΡΕ.) IS SEFhRhTIGS; CHRMlER:. id SEFlFbllPi fialE .17 SYSTEM GQliXRQELlE Ί7Α "MEMORY: ϊΙβ: :CENBBSL :εβ:@βε|β;ι.ΙΘ, obit;

Claims

claims; I. :A centrifuge1 that, ånder control ©:t a, system controller, performs a separating process to separate d solid cssipsnent irsia .scrubber water· by applying a cent rtf a gal force: to, the. scrubber .water' containing·: the solid, component and.· being supplied'f rom a- fine gas Scrubber' to: at Inside- of a .rotating separation, chamber,: further sEgasures a: turbidity levei of the· 'post-processing5 scrubber1 wafer by. using a turbidity met ex, and intermittent ly discharges:: the spild component r®· raste from the: separation, oha-mber by opening: a. valve on. a: basis of a: measured, value·: of. the turbidity: jtfeter.r wherein by using the; turbidity meter, d first tuybidity: ibtel. is measured: an so: .initial turbidity1 Level with· respect to. each, of a ;p:Lu:rs.lify of bodies of scrubber: water that are. arranged to have mutual I y^&rffé rent. turbidity levels in advance, immediately .after: the processing is started on each of the bodies .of scrubber water, and: when a: density of, the solid: component in the wasfeidischarged from the separat icuy .chaiiber: bat reached a pfedeterhtined density level during -follow-up processing, 'perfommed after the initial turbidity: ledel is .measured, a cebond: turbidity: level of each of the.bodies'of sdrUbber water diddhatged from the separation: chamber is measured, bn a: basis of the measured values., the system:: controller, calculated a. diffemenne .ΔΒΤ11 between, the second turbidity .level, and the. initial, turbidity· .level with respect to each of the plurality of: bodies:: of scrubber water having the :.mr.tually-dif fefeht. initial, .turbidity levels, also blasSl ties' the: Initial turbidity levels of the plurality uf bodies1 of .scrubber water haying the . mat tally--different. initial turbidity levels into a: plurality :of groups: according to, magnitudes: thereof:, ahd, generates a discharge trigger table or, .a, basic ,o:f the. .initial turbidity1 levels; organised in, the .plurality :o.£ groups: and the; hfeTO values: .respectively corresponding to: the initial turbidity levels,, end. the' system controller roellides::, a. memory storing therein· the discharge: trigger table;· and; o·. central processing unit that ealeuiates*. as a discharge reference: value, a turbidity level at which, the· solid eoSpohsht- is. to be discharged.,, on a, basis of ah. initial turbidity· .level of the scrubber water measured fey the: turbidity meteii and the: Mrid value dorrespbhdihg to the initial turbidity level in the discharge, trigger, table, 2.1 The. aentrifuge:. :adcor.dihg td, claim wherein· the discharge .reierenee; value .Is a value obtained, by :adding together; the:: initial turbidity ley el and th.e.: hMTlJ value,

1, The .centrifuge according· te claim 1 hr :2.,- wherein the: Solid, component in the separation 'Chamber is discharged fey opening the calve. when the: turbidity level, of the: scrubber water discharged from: the separation, chamber1 has: reached the ;dlecha.£:ge refefenee value,
4., A centrifuge. Operating; .method lor operating: a centrifuge' that.. Under control of la, system eont toilet#, perler me a separating1 pr ope,se to: separate a- eel id component., from. Scrubber water by applying a:' centrifugal force to the OCrufefeer water contdining: the solid cdmfecnent ahd: fecihg supplied from a flue, gas scrubber teyan inside of a rotating separation chamber, further' measures a turbidity, level Of the poat^precesslng ucrhbber water by Using a turbidity meter* .pi interirittentiy discharges the: solid, component .as 'waste £ rom the: separation chamber b:y opening a valve ah a basis of' a aeesbreb value of trie, turbidity siet ep/ the. peat;!:.·.rage operating method comprising.;:: a® Operation preparing step performed: on the·: centrifuge.. agd ah: epetatieh. eeddutiiag step- performed on the cent px fuge > »here in: the operation preparing^ Step" i naiades', a t&ps o#'*: . measuring" -a. first turbidity ievei as an initial turbidity" level, with reopeet to., each. sfa plurality ofte dies of scrubber water arranged tp·: hare "mutual ly-di tfer en i turbidity levels én advance.,:: immediately: atter the. processing xs started; en ea.gh of" the' plnta.l:ity: pf bodies: of scrubber water "haying the: mutusllyngifferent t urhidiiy 1eveIse .measuring a seeded, .turbidify level df each of the plurality of fepdies, of scrubber water having the; mutually"-dif ferenf. initial turbidity1 levels .add being discharged f rom: th© separation ehstaet, when .a density of the solid compbaant in. the waste discharged .from, the; separation chamber has reached a predetermined density level during, follow-up· 'prbG.essing· performed, after the initial turbidity level is heastred; calcUlatingr a difference' ΔΝΤϋ between the’ second: turbidity level· and the. initial· turbidity level with., respect to; each ef; the plurality; of boaies Of' scrubber water having the rut'hai.ly-different ibi'fcial. turbidity i eve is;. classifying the initial, turbidity levels', of the plurality of bodies of scrubber water having" the. Tsilthaliy-different: .initial turfeidify .levels into a: .plurality of groups according to.: magnet odea thereof/ and gen era. ting a: discharge: trigger table on. a.· basis", .of the;:initial turbidity levels: organIced in the plurality; of groups and the AbTø values: respectively .corresponding. ao:, the. initial, turbidity lewis i and ton figuring the discharge· fripget table into the. system controller·,: and the. operation eseorting step includes: stops. ofr measuring, .an initial tuhbidity level of the scrubber water observed immediately· attar:: the separating· process is: performed. thereon..;· ealoulatihg a dis.Chargé:: refetines value; need, tor discharging. .the solid, component 1 on a basis;. of the: initial turbidity Intel oh the SerUbher water and the AMlif value: corresponding to the .initial, turbidity level.; measuring a. later turbidity level, of the· s:drnbber hater, subsequent to the. beaturlng' of the initial turbidity leve.!·;·, and. opening the valve, when the turbidity level hat: reached the discharge referehee value. S> lie centr if ago operating method: according to; claim 1, wherein., at. the. operation preparing step, the Adld, value is set "to a iargef value when the initial turbidity level is: lower, whereas1 the ΔΝΧΈ valae is set·: to a smaller value when., the initial turbidity1 .level is. higher;.. 0.. the oentr.Ifnge; operating itiétMod according: tC claim 4· cut 1,. wherein*, a t the bpera tibh edecdting s tep/ · a. value obtained by adding together the initial turbidity level and the: .Ahii3 value covrespording to the: initial, .turbidity level, is, .used as. the discharge1 reference value.