DE1557947A1 - Electromechanical control system for steam generator - Google Patents

Description

BW 52h / CE 2784

30ο 6. 1967 kö / ko

Applicant's Combustion Engineering ₉ Inc, Windsorρ Connecticuts UoF ₀ A,

Electromechanical ^ control system for steam generators

The present invention relates to automatic firing systems for steam generators _o In particular, the invention relates to an electromechanical control system ₈ which automatically ninuato the burners of a coal-fired multi-burner system of a steam generator depending on an increase in the load

Ia recent years iat become common to control the firing of thermal power plants of einem'zentralen control Raul from (. _C in which various instruments to Anaeige the operating condition of the unit f & hig are $ z "B ₀ Meee ^ equipment ο indicator lights and recording equipment together aind arranged with control switches for operating the lighting devices "In such devices, the operation takes = personnel the boiler ;, the operating state of the plant is true and when deviations from the desired operating state, manually suitable control switches are operated _s to control so to the firing system that the deviations are corrected ο With these systems, the decision is left to the dent / operating personnel and is therefore human

/ 0 2 3 1

exposed say * With growing Gross® and capacity of "iarapiT" rzeugenden units also increases the number of gauges and the system Telle _p need to be monitored and it is to control for the operator ever more difficult "reading power plant safely and economically. Therefore there is a growing demand for automation of the units o to relieve the operating personnel and to ensure the safety and economic efficiency & ®a operation of the power plant® »The invention is directed to this concern o

The invention is intended for use in power plants which contain steam generators and which use coal as the main fuel. The Befeuerungssyetem such a unit consists of an arrangement of coal burners ₀ DL® the steam generator work and "provide heat aer fueling unit required" what to from an auxiliary system with oil burners "before ei" is connected to "in power system during normal load range" The oil burner system also supplies the energy required to ignite the coal burners. «The powder mills which supply the cabbage burners are considered part of the combustion system ₉ because the operation of the Brennes is regulated depending on the operation of the powder mills

Together with known combustion regulators, the present invention serves to monitor and control a combustion system of a large capacity steam generator with a minimum of manual monitoring _The present control system consists of an improved type of digital control which safely and economically puts additional burners into operation when the load increases

According to the invention, this is done by a control system for the combustion chamber of an automated steam generator with Coal burners fed by powder mills o those of others

109848/0231

1557347

ζ «Β«, ϋΐ burners are ignited, with the analog regulator one the rental fee corresponding to the fluctuations in load

control c * ä safeguards the drives of the mills and burners and puts the automatically determined coal mills and burners into operation depending on the load fluctuations and certain operating conditions and with a combustion controller via a pulse-controlled oil burner selector circuit with a large number of oil burner actuators . and via a pulse-controlled MUhI at an occasion circuit with a large number of Kohlerühl © n <= actuationf; <members are electrically connected and in which the pulse-driven circle "are excited synchronously with each other by a Iiapulse" Er · = aougungekreie , the over a series-parallel "connection of a plurality of switches ,, & ONS their open and / odor £ föi3chlo" 8ene the positions and little Belastungsschw = stone show some of the operations conditions, is connected to current source ein® _o

The Hegel plant according to the invention specifies devices that depend on the need to start up groups of coal burners and to start up a suitable group of oil burners, and which then aen Anfalirvorgang the coal mill c feeds the coal to such a group of burners _for the the group of oil-burners ignited = wirdo addition, located in Botrieb are devices vorgefc> _{address. UBi to monitor the operations readiness of the oil burner and the mills and the operation of such a group of oil = "burners only auszulöeen _r if they let ready and when the coal mill ready for operation _c <UEE is connected to the charcoal burner is _e which of the group is ignited by oil burners o Further devices are provided, in order to put other groups of oil and coal burners into operation in the event that the selected burner groups are not ready for operation

For a better understanding, the invention is described with reference to the accompanying drawings

^lar: 1098A6 / 0231

Figure Ij is a schematic representation of a power plant according to of the present inventor> ui £;

FIG. 2i or echematic representation of the typical combustion systems in the corner of the combustion chamber of the steam generator from FIG. 1;

FIG 3'J sch "matically a typischo coal pulverizer for use according animal vorliögenden invention ι

Figure ht »choiaatiech © in oil supply yetea for use in accordance with the present invention}

Figure ^5: schematiech ύοη circuit a "pulse Iir; circle eugunge · the present

6: the circuit of the oil burner atx -wähllrreiisoe j 7 ". The circuit of the MUhlen-Vählkreiees; Figui · 8: a typical MUhlen-Anlaeekreiej

Fii ^ ur $ t a typical Brenner »counting man for wounding ^; eat this one:,!

'F1.QUT 10: schemtk + .isch ein · Mühle -In-Dstr Job -Rückkopp.lunfjarelais ι 11: echerratiecii «in Mühle-Yerfüßbar-Relaiso

arrangement

FIG. 1 shows a thermal power station 10 _r which is operated according to the present invention. It consists of a steam generator and a turbine Ik _t which drives an electrical generator 16, analog Hegler in the form of a steam discharge valve 18

109846/0231

ηηά «iiiöö ^ lssrafungsreglers 20 have been used to control the force»
5j «rk according to» ά®η to regulate changes to the requested service ₀
DlosG he & lsr bind of well-known construction and do not form one
Tail c. or the present invention _α

Steam generator 12 consists of. a combustion chamber 22 “the
rait liquid transfer pipes 24 lined lato in the
v *.?. · «· High temperature steam generated - and then via the

* ■ & fed to the turbine 14 ο Xn of the line 26 is © in
^ vaatil 28 arranged ,, that depending!:;.} Ir, of which
^ ab ^ regier .18 sur Regulation of the steam supply for the turbine
at v / irdo Auaserdora ität in oer steam line 26 a pressure =
^ O arranged,> the demi ^ jrenmmgsrogler 20 © in Signal
The bag gate is used for setting
- wild fuel supply dea steam generator β 12 _c go
; 1ε.ίί.ί dia requested by the Ji'urb Ins * »Service is submitted _o

of the steam generator ventilates from Brenneran = ■

who work in the combustion chamber 22. Zn the shown ι

Execution example of the invention aind the Brenneran · = ι

32 arranged in each of the four corners of the combustion chamber [

d ± 9 burners fire tangentially. Each arrangement 32 consists of f

ans abvjöcheelte arranged in ßenki-realom distance from each other,

Brsanern 3 ^ for pulverized® coal _c from oil burners » $ 6 and j

ftdUeen 38 _O The details of the construction of this Ί

are known and their description is to j

The j

Burners are in sentences on eleven levels AH and J, K _t L

ordsitatp wi © © s is shown in Figure 2. Every sentence consists of I.

aas four Br © nnerdüs®n _c , one in each corner of the j

Bri & rinkaiiftMQr 22 is arrangedo On levels A ₀ G and L I serve

Serve Missen 38 to supply auxiliary air for the combustion in j

the combustion chamber; on levels B ' _c D _c P ₈ -H and K there are j

Coal burners 3k and on levels C ₀ E and J there are oil burners J6 j

each set of i

1 098Λ6 / 0 231

Cabbage burners 34 are supplied by KohlenUhlen 42 with their additional registers via coal supply lines 44 which are supplied with Br "ßn" r®i ^nlae * ^venti ^ · ¹¹ ^^ (Figure 3) to regulate the coal supply to each of these burners Each set of _G are Ulbrennern 36 vlrd sit oil via an oil supply! eitune ^ 8 e ^e ~ vomit "the lato connected to a iiauptölleltung 50 (Figure 4)

Coal feed system

FIG. 3 is a schematic representation of "a typical cabbage" supply system * which, according to the invention, is used to supply powdered coal with the burners 34 of each of the cabbage burner sets B _e DF ₀ H and K ". It consists of one coal -Pulvermühl® 42 _t of supplied from an unillustrated Senuneltrichter, broken coal via a conveyor member 52 w ± rd _f which is driven by a controllable motor 5 ^ "the lines 56 and 58 include power-operated intake and exhaust valves 60 and 62 and connect the Conveyor link 52 _s the funnel and the mill 42 <, Die Geschvlndlgkeit ,. with which the throat is fed to the burners 3 ^ _P is regulated by the combustion controller 20, which changes the speed of the motor 5 ^ and on y ^ 'lea the feed of the gt / brocherien Kohl / Ir * eile mill and d & fliit also the supply * to the burners regulates. How darlt. k & nn a speed ame β β er 64 or dergle da:.: u vervenüoi; will? a "feedback = coupling signal to be sent back to the combustion controller 20" corresponding to the coal supply. "The mill" 42 is supplied with air via a line 66 with a power-operated valve 68 ". This air serves eowohl for drying the coal in the mill and to ₀ the pulverized coal to the burners 34 ru tränepostieren "Letitoree is effected by a Geb.läee 70; which is connected between the mill ^ Z and the line 44 ieto A power-operated Mühlenauelaesvsntll 72 iot in the. Line 44 arranged after the fan 70 and is used to o oils line for the

109346/0231

Open or close coal supply _o The temperature of the mill air is regulated by the supply of cold air via line 7k, which is exhausted with a power-operated valve 76 in front of the mill in the heating air line 66. The air supply to the mill is controlled by the combustion regulator 2C via flaps 78, while the temperature of the mill air is controlled by the hot and cold air clusters 80 and 8 2 by means of a furnace air t "temperature <-R" glsr 8k controlled νίτά ₉ which a feedback "" i £ nal vo ». a suitable an ^ eo 86 for the temperature of the mill.

Oil supply system

k let a schem & tinohe representation d ".e oil supply eye temer, dnc in TFEB beirorxu ^ th AusfUhrun ^ Ebel game eggs invention ver ™ virdo Ke benteht of a main -Oil line 5O _t in the lnea all nit oil burners 36 3ed <* n Ölbr-srnersatzes C _r £ and J connected is "In the Leltuziif JO i§i tin power-operated Gl <-R" £ ullerrentll 90 ftngeorünei, dta ti "oil supply asu der. Burners 36 controls "under the fc'irituiüg the VerbrcnnungaregUre 20, If the actual value d" r ületrtticung lsi ömr Le TION 50 vlrd by a Strueuneemeeeer 92 beatiesioto d * ?. een ^£: igoal as RÜclckoppluneesignal serves for the Verbrennungereeler 20th A Kebens HBES £ ~ ^ Str0mung8regler 9 lie "parallel below the valve 90, serving d" ₀ Tzu to secure the burners 36 leading the line Oegenvart a MlnrJestbld-ucks in the EU glelch _c ^ _c ifltig what? Position as "valve 90 EIIM ± afö.t _c wenr the Ölzufuixr" - syateci let into operation ieto This minimum oil pressure one ^ of eriorctarlicl: 1st, vm atomization dee the burners zügefülirten oils au ensure ;, eo <LAEE they can be easily ignited . In the example at hand, a <Jld3-uck of about seven ntta, (100 ptl) is considered sufficient

Dx * Line 50 carries the oil to each burner set C, E and J via branch lines kB xu _e, each of which has a force-operated

109846/0231

operated valve 98 equipped lato Gleioherioassen is oil burner. Equipped 36 with eineia valve 100 ^ which the operation of its burner beles occurrence a "$ uncertain Be drive concluded β cancels _B by a connected device (not let shown), it is determined ₀ Ignition of the burner 36 is made by a pilot burner Uo ₉ of each burner "ug © assigns is" Zuai purpose of a brief description is only one such pilot burner kO shown k in Figure "Every ZUndbrenner ^ O ₀ usually with Ga" is fired, be · ffiitxt a fuel valve 102 and a spark plug 10h _g the be operated; when the oil burner 36 is heated thinner ₀

The oil burners & nLocated the figure, h is used to generate the combustion energy in the combustion chamber 22 _s during the Aiivärm-Phaae and for the preparation of fires once ^ Senergie for coal burner 3 ^ during normal operation of the Dampferzeugerβ _n During d "r Anwitrm ^ phase, the Ölbrannersystem is automatically regulated by an independent auxiliary regulator (control sub-loop) which operates each oil burner in each set in a specific sequence, so that the temperature is calibrated? doe Dampferseugexe each and afterwards up to its handsetHPvetriab Temperaturo to describe the present invention it is necessary *

themselves

ν earthy to understand - that danri, when the steam generator «goes into operation _r - after the advances in front of g * ng ■ _, tier in the synchronization dos elektriochen O * iaiei £ .t.ore Io ends _f ai> closed i »T ■ = · - all oil burner seeds-2λ C _; E and J wehrrand have their "B * drieb3" i der Kontirolie d * a Vei bi '* an «ui, g * f« i: lere HO be fi3J.d * n and gelange ii B * itriäb bJLe.ü ">"; N _; until the recitation of the v" rerenoungunnergie in <\ vr BrermkP.jiEiirr 2 ^ γοη. The coal brar-nor-A: ilaje über.-irnomnsen becomes _r deirsn Regoi, u / jg the main state of the present invention is"

10S846 / 0231

Control system®

Boutin Ib elnd gemäsfe devices of the present invention Vcrg "EEH * n _t how" every ta Se; from Kohlbrennejm B ₄ . I> _c F _P H ccd K safe and effective © * «in £ atriat» s> _{ahmen 0} and i «ar autolar.ti ^ chj without an overvision by hand necessary IqI ₀ D1 & S4I Vo." Directions also exist of a digital controller with Pτο gr suam _B der dia K.:>hIo"Pulv rniü3ilen. 22 _f die p.ä, each sentence vc-tj cabbage burner & nge »; include a _p depending on an increase dor &« ße! T> irdert «n performance there«. DampforE & u £ er "takes o the effort k2 werdöii in oestimmter result in Betrisb genomoen _r preferred in dom Aue.t *> ^ ihrvii? beiapiel in dor sequence D-J3-FHK ordered ₀ the R ^ elvorriciitingan by dex * vorliogönden invention scan the Zuβΐam * each Mdhla ^ S from \ xrxA nsthmwatate only then in operation: When the person at the time had put it into operation _c In cases _3, one or more of the iti; * len in the result of safe operation are incapable or if their operational status before. JTt ^ e ₀ B ₀ for Ve.r tungs <f work on _s unt «rt> smelled-» n been ietp kmm the Regeleyeteui a «other mill in the field fire _P which can be operated and it is in operation _P ao because an increase in the specified three-way line is taken into account.

Cbv; ch; bax the described Auefuhrun ^ ftbeiapi ^ i. dor £ rfi.ndung the Feuirungeoystetn fUciT levels VOA Kohlf.brintern 3 ^ r dictating that they Sbencn of oil burners 3 ^ and three Kbenen of LurtciUncvn J8 ent hO.lt _t the "iUÄelnen Elaute-nto jrcier level in each 'iei Viei' Eckeii Φ '.τ Brennkamiaor arranged "in ^ lf vwreteht ea eich ₀ dti.3s (υ»; «® arrangement is only for the purpose of veranisohaullchung and dthiea after the presenti emptiness""entered" 3 "or smaller number of Eb € »Nen ν <* i turns in front: can.

In Figuir 1 let furthermore a firing controller 106 dargeatellt; the! Kur regulation of the operations of the KUbIo k2 serves what aelnor * »

109846/0231

The burner controller 106 works independently of the combustion controller 2Oo The burner controller © glar 20 is an analog controller and controls the operation of the mills and the burners depending on changes in the state of the system. The combustion controller 1O6 Let, according to the invention, a digital regulator with a fixed program and its control function are superimposed on the property regleys 20 ο Xnsbe8 © nd®r® 'ts * 5ti®tit »t the _E that the Vsrbrenntr« &·.' ?. he · however, 20 di © supply of work equipment ;, nämlioh Brmxaatoff and Vasasr sum DampforBeuger depending on Bölaeiungaäntierungen regeltt> the combustion controller independently the number of coal ^ Pulvcrmühlen k2 and hence the number dor coal burners are taken _£ in operation ,, changes "e · let the task d «> 5 combustion controller _{106 v to put} the mills k2 and the burners jk into operation and that of the combustion controller 20, the Be =

to regulate these mills and the burner drove ^ when workers ensure that this target wird- reached, the combustion controller 106 _B, in addition "Brenner first determines when the need in operation to take _p auftrittο Having determined ± et _e that additional burners are necessary ? the furnace controller 306 determines which of the mills 42 is ready for operation and takes into account whether there is sufficient ignition energy from the connected oil burners at heights C, E and J to ignite the coal supplied to the coal burners and also determines the operability the appropriate mills into consideration <> in this way, takes the controller the appropriate steps _r to the selected mill and "to take the appropriate Kohlebrennereatz in operation this is in a certain sequence '. ^{% i} .: ■ - ■ _ ν · « r- ^% - off» but the selected mill and the burner set cannot be operated in a calibrated manner ₉ the firing controller 106 selects the next mill in the sequence and starts it up, etc. _f until the requirements of the load change are taken into account lato

10984.6 / 0231

Impulse ore © ugtmg6kr®ia.

The firing controller 106 consists of three components. ;

namely the Xcipule-Eraseügungekreie (Figure 5) _f the oil burner ™ ί Eatz ArUasskrei "(Figure 6) and the mills -Anlasekreis (Figure 7}

The pulse viewing circuit in FIG. 5 divides a series and parallel arrangement of switches; the ar. © © are connected in the power source and are used for excitation ein®ε Pulse Generator "108" through a power switch 13 0 the combustion controller is manually deployed ₀ The circle beetent au "the parallel lines 112 and 114 _a line 112 • loading the tiBunt operation of the unit has been before genosssen any mill is in operation, when a set of conditions required iet for commissioning a mill ₀ ßi "line 114 lot in Betrieba vsnn a ödere more of the mills in operation or eind and another * set of conditions applicable lato Di © line 112 contains a series connection

ναι failure Il6 _s 118 and 12Ö _O The switch 116 is ®in \

nornaierweie · more open manually. or by a relay loaded -j

trinbener switch; dor ν to the circuits of the 1st Turbinengene- raters connected and geechlosson is _c when the generator is e ^ Tichronisierf and the unit therefore for oen Ali \

echlur.8 on «in power supply aye tem ready iet _o The switches 118 are normally closed, relay-operated switches; the angeschloseen to each of the mills k2 and are therefore in the Znichiixungen with the letters fi.D _{(F r} H and κ provided> so dsiae displayed _f which switch with which mill iet connected Isto Joder the switch HB remains geschloarjen _r until it connected grinder is put into operation _t whereupon the geeien "*" switch through "in Rüclfkopplungs relay t 272 (figures 8 and 10), overall the interruption of the line 112 ^J öffnst _vird; so that no electric current to the pulse generator 108 fliesstc I>"r switch 120 is a normally open _r, relaie-confirmed switch _c of the oil Stramungstaeeieer 92 in the main Olasufuhrleitung 50 (FIG h) connected iet _e

109846/0231 [

Di arrangement © i "t _c so that ®in (not shown) Be-t% ~ tigunge Italale the switch 120 b © l einera certain value d @ r Öletröraung. "· · ■ · ■. '« ■ · ^r "' to amn burners 36 closes _s des? a% farm «potential beeitzt ,, dssa dem. Wftraeepotential of the lowest possible K © lil # men.g © emitted by a mill, in addition to the ¥ ££ srm®potenti & l of a connected oil burner set, corresponds to ₉ that for ignition: ύ®τ used by the MUhl # aug © fülirt © n Kohl® willo the purpose of this. K.ontrollelementee is _ββ ν, preserving einos Vfirraegl ^ ichgowicht® in Brewuikammcsr 22 su verifiable _"rn if dl © Quell® c; r © V®rbrenn, ungaenerg i" changes from oil zn coal.

The line 11 ^ contains a series connection of switches 122 and switches 12 connected in parallel * " _O Dey switch 122 is, min noraalsrwelae ^ e" opens # r _s relaie-operated switch ^ the g "8ohlos" en "ird ^" enn the aaittlere loading of all Brb @ iter "l * jj mills k2 at least 80 $ of geeansten out Plant & intensity is <ä®r mills» Dar switch visrd ago (© .icht shown) relays. _£ operated as "ditiin is operated by the, combustion ^ _f regier 20 when 'the mid' * Kohlet b ^ & ba. the mills' 8O ^ in operation is their total capacity _$ what wirdp beetiimut by Rtiökkopplungsuignale atm from the Greechwindigkeitstfetaeer 6H / i * re wan-.men ,. clei * an every mill! order member 52 angeachiosseu is "Dl" switch one! in poigneter Vaieo with B @ zui; 8r.eichcft vsi-eohöri ,, um

Which Mühlo joder switches »ngos <3hloe« en i & t uric cie are norisialervejae open. r.ftlais-b »made ScJieltev, dl« geschlocseon verden _c wönii iharc ent apre chezide Mllhl © in Bfj-

txieb g «-noBimeP. becomes ,, on csieae Vclae beutinuat di «line

the operation of the »combustion controller 20ό _; nuchdent littleetena one of the KohlamUhlen 42 has been in operation ie to

The Imp \ ile-Ersöuguneekreis contains ausaerdora the parallel switched switches 126 B _c 126 D _; 126 F _p 126 H and 126 K "those with lines 112 and 11 '" connected in series "alnd _e

108846/0231

The switch 1 ££ normally g®öffnete _p of relay 218 (Figure 9) confirmed and to each of the appropriate mills k2 connected switches "are closed when the corresponding Muhl © plants ready Isto By" · "plants ready ^w is meant here. se all the necessary conditions for one
^"1 Reläie is displayed, DI® discussed below ,, An additional aspect which, in the term" safe Mtihlenbetxi © b present "ind ₀ wae by actuating suitable Rückkopplung8 muee be drawn ready" into _{consideration;} is ₀ that the Muhl ® calibrated is not already in operation This state is also determined by the actuation of a suitable feedback relay, which is also dealt with in the following ο

The pulse generation circuit also contains a series connection of switches 128 C ₀ 12β and 128J connected in parallel, which are normally closed and connected to each of the corresponding oil burner sets and then opened
_ύ if the corresponding burner set cannot be nominated in operation ₀ The switches 128 can be opened manually
become _b x ₀ B ₀ if maintenance work has to be carried out on one of the corresponding burner sets or on several sets, but they can be opened automatically by a control relay
, The arrangement let βο _ρ <aes the switches 128 are then automatically confirmed _c if the number of oil burners 36 operable in each level C “£ and J is not sufficient” around the
Coal burner 3k of the connected coal burner set a too
Blind en ο

For this purpose, burner counting circles ₀ such as B _{0 of} the in
Figure 9 shown »; uses "to operate a <

Ölbrenn®reata®e to prevent if more than one of the four burners 36 a® © set is not operational ± et ₀ because it

'hatf da.® »a. Sats _p b @ id®m three out of four

1S57947

Ignition all the coal burners 3k can generate the connected _{coal burner sets o} Boron counting circuit consists of a 3®ri®n ~ P & r &lle> l ~ circuit normally open switch 130p, each of which is connected to @ in © and the four burners are connected from which a certain set consists «The reference characters 130 are provided with suitable letters ^ a _c b _p s and d _{r; 0} to anzuaseigen which burner with w "lch® & 2 switches connected isto In the bsvoratigten Ausführussgsbeiepiel the switch I30 are Endausschlßgschalter ₈ are j®d in response to the movement" e © operated burner valve 100 and then _opened; when the valve is open _(as shown ds.es vird _s that d®r aga schloesene Branner in operation isto If so does not open more than one valve 100, an electric current price on the suitable switch I30 is closed to operate the relay I32, j is then the connected switches to I28 in dep-pulse generating circuit of Figure 5 opened as is = provided let the Pelaie 13? at the same time the actuator of the switch 156P 158, 182, and l & k <. These switches are used for producing feedback signals _r the Betriebsfähigkelt The connected oil burner cores, the oil brewer cores (Fig. 6) and the Mühlen-Vahlkreis (Fig. 7) are shown. A detailed explanation of the operation of these switches follows.

D®r encoder 108 _c of wlrd operated by the Xtspuls -Brzeugungskreis ^ _s can ale Sychronaotor constant Geschwindlgkeit formed eein which drives a cam _Ι3Ί? which activates the switch I36 intermittently _c which then in turn excites the keiais I3Ö interstittA®r © nd. The motor runs at a speed of 1 revolution per minute and the switch I36 is for di @ Dau · ^ · of two seconds at j # the Ufüdrshtssng g- @ © ehIoffs®Bo In this way the R @ leis I38 J ®d «Minute sw # i S®te.im <a®n long excited _e the EiEpul8g © b®r 10®» excites

»13 -

Pelele 13 «estelleest e lei cb« β it ig the switches l4o and l42 _s which are the actuating elements® of the oil burner set ^ Wilhlkxelee l44 (Figure 6) and the Mühlen-Wahlkreis®® l46 (Figure 7)

Oil burner set ^ selector switch @ is

The ö! Brennereat25 ~ Wählkr © he d®T Figure 6, the pulse generated by the encoder 108 si the operating Egli springs one of the ÖlbxennereätsE® üb © raiitteln _r. the operation of this sentence "be ~ ginnen au iaoeen _o üer Kr" is contains uen pulsating switch l4o _c operated by the Heiais 138th B © r switch is on, the three parallel Öltorennereatz-Betätigtsnge-Relai "15 ^ Cp 134e and 154 J" connected, the arrangement being such ₀ dase the Schlieeeen dee switch l40, the excitation of only one ύατ relay I54 and corresponding start NEN of the connected causes oil burner replacement. In the described embodiment of the invention, β is favorable ₉ the oil burner substitute C ₁ . which ignites the neighboring cabbage burner sets B and D _{v first} put them into operation u & u. Subsequently the oil burner set B ₀ which "burns" the cabbages B and F ignites and finally the oil burner & tas J ₍ which is used to ignite the coal burner sets H and K; put into operation ^ after the switching of the figure causes the closing of the pulsating switch IK) the actuation of the relay 15 ** C ₉ except when the oil burner set C cannot be put into operation _c either because it has been switched off or the mills of the coal burner sets B and O are both not ready for operation. If the relay 154 C cannot receive the signal _{f the} next thing follows the heat 15 ^ E and activates the burner 36 of the oil burner etch of the level E _{c the} same "- masses the relay 15 ^ E receives the exciting signal as long as"

as it is not switched off itself or its connected mills 42 D and kZ F are not ready for operation "If neither relay 154 C nor relay 154 E is actuated by the pulse" then relay 154 J receives the signal and takes the mills connected to the lira 42 H and 42 K in operations The circuit shown in FIG. 6 for performing this function is a series = parallel <= circuit of switches 156 _c 158 _ε Ι6θ and

1O'9046 '/ - O231

16 ,, ·

162o For the purpose of greater clarity, the same switches have been given the same prefixes _P but supplemented by suitable letters ^ to indicate which switch is connected _{to which level s o} The switches 156 are operated and have the same burner control circuit relay 132 the same sense as the switch 128 in d @ ra Itnpule generation circuit of Figure 5 and are therefore closed when the corresponding Ölbr "ianereatz not disconnected from the operation _o the switch 158 just fall from the relay 132 operated _s but have the opposite sense to switch 156 _Ο Therefore switches 138 are closed when switches I56 are open and vice versa ₀ Closed switches I58 show that the oil burner etch has been switched off and therefore cannot be put into operation are normally open and are operated by the mill ready relay 216 (FIGS. 8 and 10) level and have the same sense as the Pchaltox IIP in d-anr pulse Erzeugungskreie FIG Therefore 5- (jieaa switches are closed 160 when the associated mill h2 operation feareit and energizes relay 216 iet _s Schaller 162 are also of the relay 216 actuated _c but lift the enteegengasdtaten sense like the switch I60 and are therefore guechloaen, vttui the switches I60 are open and vice versa ß the switch 162 indicate that the connected mill is not ready for operation

Vie dATgaa shares; consists of the Ölbrenneraatz Wahlkreis (FJ.gur 6) e. \ i9 di one sub-districts I6i4 _f 3.66 and I68, 4i «zuclnundtr pandl ·! and the impulse generated by the short-term failure of the failure can be transmitted to one of the corresponding oil burner operation (? - Relay 15 ^ C _r Ij4 K and 15> * J0 The -.Part circle 164 contains a series circuit of switches 136 C with the parallelgeeohaltet "! n switches I60 B lind I6O D. Therefore flieast an electric current to the relay I54 C with closed switch 1 ^ O _1, the C Ölbrennereatz the mill, the wnun not switched off vox Ketrieb and entw""h'i B

109846/0231

- 17 odor 42 D is ready for use *

The pitch circle 166 includes ein® similar circuit of switches 156 E ₀ 16O D and 160 Fp which allows' the relay to energize 154 E by dsn Impule so lasige "as the oil Brann replacement E is not turned off by the operation and either one of the mills 42 D or KZ F is ready for operation _? w © leh © the coal burners 34 supply coal which are ignited by the burners 36 of set E «Dar T © .t.1.kr © ris 166 furthermore consists of a series-parallel anardiaung of switches I38 Cc & 62 B and I62 ü _s the one Stroäa ~ Sstfud 'close by the partial circle uiüsoeno before the Ralais 15'ä' can be rrogt? Therefore, the relay is energized 154 E by d © n _$ by the Schli®isseTi d © s switch l4o generated pulse siur ,, is wsnn d © r Ölbx-ennereatis E not abgeschältQt the operating and "in © represents Mills 42 E or hz F is ready for use but also evtlc due to the fact that the oil burner ₈ set G: nloht turned off by the operating iet _s vas by closing switch 158 C dsa displayed iet _B or both mills 42 B umi. If D are not ready for operation ^ which is indicated by the closing of the switch I62 B and 102 D.

The Tiiilkrais 16ö contains a "similar arrangement of switches Λ.56 -J ₁ , 16Ο H and 16Ο κ and since β closing the first en and we.i s & rhtn one of the two!" It allows _c the relay 154 1 asu energized, This partial circle also contains a Sβx'i. «η Parallel arrangement of switches 158» which are connected to the other »ÖlbreniTsreätasen C and E together with the switches Io2 _s which are connected to the MUhlsn 42 B ₉ 42 D and 42 F ainö usio dies® arrangement allows e «as shown; d © ni Itapule only d & zin aura relay 1 ^ 4 J au -run _E when a state © sli! ted; the dia excitation of the toeidsn other relay 154 C I54 E. prevents ο

■ Ϊ Mills ~ Wfehlkre1β

■ ■ · '- ■, f

The mill selection circuit of FIG. 7 selects one of the mills 42 for f

Commissioning off «if conditions occur _D that require it ₀ ι

46/0 23 1 \

that another coal burner set is a Commission _o Dor circuit consists of four parallelg "βehalteten pitch circles 170 _c 172" _ρ I? '* and 176, each of which the by closing de' pulse generated switch 1 ^ 2 one of the respective mill Actuating relays 180 B ₉ 180 D and 180 F, 180 H and 180 K transmit karm _o Di® arrangement let eo _f that the pulse generator »relay» u © $ | @lii »te pulsed® closure of switch 1 ^ 2 only one of R®I »± ® 180 transfer is _c usa di © him connected mill h2 and the corresponding Kohlebrenuera & tz au operate" at the fo © sch3ri @ b © n @ n Ausführuingebeiapiel the invention, the Kohlebrsnnersätae in episode 1 are> ? -B - * · - ■ HK _o genotsmen in operation Therefore, the circuit of Figure 7 let _βο; that the li »Iaio 180 D is energized first and if the connected Kohlebr" nnersatz D eicher can not be in operation ga nGSüBsen _p. either, there will be no sufficient ignition sources available from the neighboring oil burners ^ ateht or the MUhIe ^ 2 D is not ready for operation _f the impulse is then received by the Relate I80 B and etc. through the whole sequence

The MUhlon-Vählkrei "of the figure-7 1st an Seriexv-Parallei -Anordmtng of switches 182 _P 184 _t 186 and 183 _O Wied & r are for the purpose dex 'description, the same F he ehalt with same Bf * 2ugszllfern additionally provided the appropriate Buoh8tab" n _P am? .nauz & igen _c which ärennereat ?; rait velchera switch verbun4 # n is _c

The switches I82 alnd normally gets ff net * and are used by dei. Brennwr- ^ iihlkreis-Ral & ia 132 (Figure 9) is actuated and Zind closed; wean au " Ra.laie 132 3bo7 * r" gt .1st and ftnaei. ^ t, that at least three out of four Erennarn © inoe oilhreanersatses are in operation and that "a sufficient ignition% n®: ~ gi.o to ignite the coal is available _t the sntströmt the burners century _"; ντβϊΐη the enteproehemiexi mills in Betri®b genoraisexi bandage.

As shown in FIG. 7, “each of the partial circles 1? 0 · - 176 d * n can generate a“ The MUhlen- ~ Be actuation® relay I80 auleitanc The partial circle 170 to excite the relay 180 by closing the switch IA2 D includes a series connection of switches 186 D with umn p rallelliegenden switches 18? C and 182 E ₀ A Strocs only flows through the circle zuss Kelais 180 D after the pulsed closing of the switch I ^ _p when at least one of the two oil burner sets C or E _t that is adjacent to the coal burner & ts in level D _{and D is} in operation and the mill is ready for D k2 "the pitch circle 172 to energize the relay 180 B includes a serial circuit of switches 182 I86 G ₁ B and 188 D ₀ In this Wales will get noticed enteprochende Helaiis energized I80 B _P when the ölbrcrnereata. C in operation iet ₀ which is indicated by the closing of the switch 182 C and if the mill k2 D is not, - on the other hand the mill k'Z B is ready for operation, - what is indicated by the closing of the switches 188 D and 186 B »Der Part circle 17 ** contains the switches 182 E ₀ 186 F and 188 D _f which are in series with the switches 134 C and 188 D connected in parallel. The relay 130 F

■)

The switches 18k are actuated by the relays 132 but have an opposite sense as the switches 182 ₉ | so the only closed when the latter is opened ;; are and reversed Therefore, the closing of the switch shows; 184 indicates that the assigned oil burnereatζ does not generate sufficient ignition energy to ignite the neighboring coal burners. [

The switch 186 are normally open and operated 216 (Figures 8 and 1O) of Relaie and have lib the same sense as the obenatehenden switch and 100t, The Schliesaen the switch 186 therefore indicates that the associated "" toil £ a k2 ready is. Di "switch 188 _D the just fall through" SI® relay 216 operated "ind _t have" inen opposite direction as the switch 186 and therefore are closed when the associated mill · h2 not ready companies

4 «eh & lb after the switch 1Λ2 has been switched off,« if the oil forcimereat C is not in operation or if it is in operation, “none of the mills 42 B or 42 D is ready for operation / provided the burnereate” E can provide sufficient ignition © nergy Aror ignition of the coal supply is removed from the burners 3k @ in © ed @ rs * s <g "arrange th f & ohlebrennere & tze ^ and further provided _c öase the mill 42 F companies willing ieto -The T®ilkr« i »I76. is on actuation of the mill actuation relay I80 H al © also the relay 160 K angeoidnato The series »parallel arrangement of the various switches 182, 184, 186 and is SO ₀ that the relay ISO H is energized ± r £ _f when his' iuse-MUhIe k2 H is ready for operation and the associated oil »J generates sufficient ignition energy» First of all the Ströse sub Reiaie fliseet over the line from the failures 18 ^ C and Wk S geeohloeeessen ^ when the oil burners C and E both & ttfee «r operation ei &d; aweittcs uxtsi Wk B when the oil burner is tn operation, but none of the mills B hs ODSR k2 E operational and the Ölbrennersats E is auseer operation over of the switches 183-D geechloesene line; thirdly, through the line formed by switches 188 B, 188 O and 188 P, vezm one of the two or both oil burner sets C and E in operation and _p but none of the mills k2 B _t K ^m f D or ^ 2 F ready for operation ietj uföd fourthly _t through the line formed by the failures l & k C ₀ 188 D and 188 P when the oil burner stits £ let in operation but the mills 42 D and k2 F are not operational and the ÜS ^ rennersats C are not in operation ieto l'ieaer pitch circle I76 Also contains the parallel switches 186 K and 188 H ₅ which are connected to the Ktihl.en-Acting relay I60 K and ₀ At this point, the relay 180 K receives the excitation signal via one of the above-described current paths if you go beyond the one assigned to it MUhIe 42 K ready for operation but the mill 42 H is not ready for operation

102UC / 0231

Cooling system

Figos: The societal representation is a "Mühlsn-Anl a.-is |

_e as "r is used in the present invention, the illustrated circuit is © is the typioch ;.» used for the Kegelanorßmmg, · -1Ie, _B one of the powder mills kz in Bettlet. In the case of the written execution example of the force five different currents are used, but in order to avoid unnecessary stress, only one bad will live e-acha) · - teter pitch circle 190 «202 _ί? eat the Measvorrichtungan j your mill components of Schaltkraiee hsratasiBaeno The Meeeglleder ffl - are each different phases eng Anfahrprogramme the angeecflloaeeneu Mühla 42 regulated Oer pitch circle 190 includes parallel arranged Schalterp di & Don feedback "βigixaläii actuated by the VCR · echiisdeneii, _t trier «τι jeöe der vareehi« den <m Mlihlen-Bedineujißanp which must be satisfied before the In "> etx iebnaijUB® of the mill _Q For the sake of a brief description there are only five such" switches "shown in the pitch circle l $ fO the switch 204 _P which "La HÜckkopplunjgaaignal of the KöltlusTt-Einlaseventl 76 ^ t ^ t mpfikj - the anaeigt _c that this geöifnat i itj the switch 2O6 ₃ represents din feedback.!" signal from the Milhljn--AH8la3eVent.il | 72 E ^ hH.it; da «indicates ₂ that this valve is open: the j Sc.iialtor 203 and i; 10 _Ρ die _: which ana β ig en _f di & se die £ i]

and Äuelaeeventile opened 60 and 62 of the Pördergliedea and the switch 282 / operated by de »Relays 260 and displays ₅ daß8 di" coolness not shut istο Except to the signal for <£ s switch ZBZ this return Kopp lung signals slightly from Endaueeohlae RCCBs at the corresponding valves are obtained ₀ which are then closed,> if the corresponding valve is opened ₆ In the actual design, this partial circuit contains some more Khnlic «1. - · switch (r Show the other states and the need to geschloseen before the mill werden'kann considered as working properly "This ZuatHrwie ODSR conditions entaffilt" n _v that Mühlfiiitesaperatur is norraal} "ine appropriate

109846/0231

- · 22

Lubricating oil and cooling water supply baetaht; and much more, if svllο satisfies these conditions SiHd ₀ a circuit through the Teilkreie 190 Suia Mühl® ~ ~ Ready Relai © 212 is closed, thereby energizing the relay 212 ,, the dan switch 2lh fflohliesstc in the pitch circle 192 DI® Batätigung "iee mill - = B © r®lt relay 212 seigt of _p all® that for safe operation a®r ang®- g) chics Oenen mill h2 satisfies required conditions "ind 1st one of the condition is not reached on _ΰ remains d © r suitable © Switch open and so there is © excitation of the relay

The tail circuit 192 contains the Mühle ~ Y®available relay 216-, which is connected in series with the switches 21 '* and 218 ± st _o Wi® mentioned above, the switch ZIk is terminated and is connected to the Müfele-ready relay 212 by its excitation geschloseeri "the switch 218 iet normally closed and connected to the relay 272 (FIG lo) In Teilkrola 202 and _r is opened.

is di © angöschloasene Hühle operating genoiaiasn, =, relay 216 so then energizes the mill will dag _£ By Schlieeean ueos pitch ©© 192 when the Zulaeoungo-Bedingungan the nec © a chic, there are bcsfrledigt "non grinder all provided _t iet ₀ How daisesteilte not already in operation in Figure 10 operates the Mühlo = Available-Relai3 216 various other switch & nf the above Beaug ganozasssii was ₀ These switches exist in the switch 126 in Impula-ICrseugungs ^ Ereis the figure 5 _S switches 16Ο and 162 ± n dom oil burner set ^ Vählkrels and the switches 186 and I88 in the Mühlen-Wahlkreiso

Dor Teilkx-elö 194 of Figure 8 holds the motor drive of the cooling ZQitgöberes 22O ₀ dor in series with switches 2l7 ₀ ~ 2P.h and 226 is o The switch 217 is normally open and is controlled by the »ng®schloss®.» © MÜhl © nV @ available = relay 216 actuated Dföf Schialter 224 iet siorra; *.! proved β opened and is actuated by the relay 132 (FIG. 9) in the connected burner = counting circuit _p ά &. & then closed v ± Td _{ if an aur ignition of the coal burner 3 ^ * · auysc »; LciMittde 2üEisi®n®rgie is present. The switch 226. ieI aorJ®ii®irw®is® opens and is through

557947

the connected mills ° -Betäti & ung @ ~ relay 180 of the mill constituency betätigtο The Schlieasen dee Teilkreis® © 19 ^ causes Zurücketeilung and the start-up dos Z © itg®b © rs 2; o _r the iet adjusted _c dese he a A period of at least 120 seconds has ο During this period, each U9 »T different steps necessary for the milling process are carried out depending on the following each of the timings 228s 230 _P 232 and ? .3k _s . . vcn the teasing or derglo actuated könntsp "The Schl ± ®gg®.n timer-Kontaktee 228 ± m pitch 196 ®rregt" the parallel-connected solenoid * © 2kh _&: S ^^ b ,. 2 ^ 4c and ZkUu ₉ which open the coal burner inlet & 08V <g> ntile k6, which open the coal supply to the burners Jk in the a, n ^ e @chloesenen Mohl burnereat

Forms part of circuit 198 of the relay includes 257 "the ltet in Saris with the timer contacts 230 and the switches 248 _f 250 and 252 geech & istο The 2" it £ © b © r-Sontakt 230 let ec set _£ that sr URG * ffehr 10 seconds naoh de »contact 228 las pitch circle 1 $ 6 is« the «switches 2 ^ 8 are nor» eierve ^ se open

Switches the g®ecbJ.oecQn when each of the closed valve k6 is open «The switches 250 and 252 are connected to the MUhIe = B®reit relay 212 and the Breimer counting circuit kelaie 232 yerbund» n _e these two «^ the latter switch in pitch circle 198 assures an® immediate «interruption of the; Mill ^ nft ".rrvor _(c gaiigee if some condition occurs _r which the BereitschaftsKuetand d * r ^ at sechloesenen Hiihl" eliminate would, as indicated by sine Aberrogung do Beiais £ 212 or & lthough the Zund # nurgie not available ECHR iet _f indicated by the de-excitation CIEE relay 132 shown virdo by SchlJessen de "Teilltreises 198 is energized dae relay 257, the | equilateral dmn MtDiIentsotor 2 $ k and the solenoid 2 $ 6 of the | Heieeluft-EinlRBeventilea by Schliöesen the switch]

2 $ 8 and 260 actuated In addition, the excitation of J

Relay 257 the closing of the switch 262 ie pitch circle 200 _t |

■ ■■ '. ·· ■■. I.

which excited the motor 5k of the conveyor element © «. The motor 5 ^ becomes |

nachdatn the Relate 266 operated w ± rd _o Dl "> e overall -echieht characterized _β as" a, the timer contact 232 and dadur ~ d * r partial circle 200 is gaschiοescn, namely unfsfähr 30 lesraderi n cndera the MUhleraotor let been energized 254 ₀ Vied «* ·: J.» T dl «Actuation of the Kotore S ^ of the conveyor link®» depending on the MUlil8 .- <- B © i ^l «it '» R «lais 212 and d ©! T Brennsr-B & hlkreis- Rolaiß J 3 ^ j «? .L * IUB Schlieaaen'd« r switches 268 and "270 both remain energized

Partial circle 20 ^ «ntMJ Λ the relay-272p that the mill

Batrleb-Kelai ». and is prepared .by the 3 © ty ± supply de "Relaiß 266 zv .. \ f 2Trrogun3 χχηά schliss I si by the

The Zei ^ $ «is excited via" contact "e ZJk " v "e about 6ö seconds after the bottom of the timer contact 232 |« ^ @chieht ₀ The Srreguiis dee relay 272 causes the opening of the jiorciaierwöise · eechloasonsn switch 218 Is partial circle 19? _R whereby the KU & le-AVAILABILITY-Rälais 2I6 is excited uud -dl * 3ch »lr <» r 162p 138 and 217 opened and the switches I26, 160 wad 1C6

Dl "excitement dee mill-in-Eetrieb Rclale 272 causes au ^ li dl <i opening of the contacts 2? 6 iai pitch 203 * The telik ^ aJ.β contains 203 dae relay 28o _c in the Serie.mit the switch £? 6 and your Zoitgsbor contact 278 is arranged. The relay 280 i * t the MUhle-Absch & lt «R <9laifrj ussd tfffaet the switch 282 ii? T * ii circle 190 ln "er then, if the cool-ln-bstrieb-Relttie 27 ^ not (BJTTA ₃ Jt ie t _e The timer-Xoa clock 2? Β is so" ingeotellt? Each he is about 5 seconds n & dh deea contact 23 ^ achlienst Wmin DLSO the Mühlec "start-from any? Grun <! not fully implemented vill not the relay 272 is _r sondsrn the relay 2ßP" excited, opening wae dea Schelturs 282 In letlkro.ie 190 and thereby di # Aberrregun ^ des Mtihle-Sei cit-Rvlnie 2X2 Uli "? Then the"Mühle-VorfUg'oar-Relfti"216 brought about

Operation cies neg «lsyot« ma

Zuxilchat «ird angonoi & men _P daaa the steam generator started from the cold 'Zn stand weo and that all of the' Palveriatihlen h2

109646/02 31

fugbax and ready for operation »iad ₀ i) © r D & tstpfgenerator rough» a then after ueö sirch are first heated, »o that the various pressurized« »parts of the unit are not exposed to inadmissible high voltages« because «heating occurs through the supply of water to the. Pipes 12 and oil such as any of the * oil burner "! &Tas" G ₉ E or Jo Di "Heat generation in the Br" nnkaia9s®r 22 is gradually increased by increasing the oil supply through the control valve $ 0 ± n ά®τ main oil line 5 ^Ö v @ rgrösa «rto With a further increase in the appendix, additional oil burners will be put into operation and they will not be part of the process through an independent process Invention formed

Do termination do ^ Anheisivorgan ^ ee is the powerhouse ready _p i'ür connection to eln®ss £ nar $ i "zufuhreye'teieo This ^ egohieh ^ p when the AuAg & ngsap & mumg electric Generatore in Ph se" lit the dee Kn "rgi * -Züruhrayeteta is working whereupon the steam power plant UMter normal Bedlngunjgen and dieβem time animal Fauerun & e <~ regulator XO6 is άβτ present invention virkeatSc for startup of the various Kohlebrenn®rsät2 $ B ₀ D _c F _t, nehpen n H and K in operating% »

Let been described above Bedineun £ dn _e näralich, d ee & waste from the oil distillery * tee C, E and J are in operation and kein® the VulvernUhlen kz am now ®noiasen running £ but & 11 · betri "beberelt Ainet" are verifiable dl "Electrical switches of the various partial circles" which "form the fftuerun £ e-9egl" r 106 in the foleende "£ ue $" ndt The activity person 110 (Figure 5) the inpule generator circuit is chechlose and άβ> τ Feuerunge-Pegler 106 thereby (8 figure) iet tHAT CONDITION & ra geseachto in the Kühlen- ^ nlasekreia "angeachloeeen to d ^ n 4®d® mill ** 2 _e are e.11 © switch in de & circuit part 190 is closed and as" mill- = When "Relay 212 is erred" because all conditions for "safe operation of the mills are present" Since the connected cooling " kZ is not in operation" ₁ , the mill is in operation 272 but Ißö therefore the & n connected to it © «Φ switch Ü16

09846/0231

2ί>

± m l '«± Ikr« ± s 19% closed Auess & i-t & fcKs are üi & Schalt «! - llü Ii to K in the line Hi: de® liapuAttH & rsetoU & uutiiikvtiiiittfc $ ** = sohl OS» sen ρ da di © corresponding MUhiä "> lu <=> 13bt « ^> lel>« ~ R0i. &: i. & 2? 2 & fe®rr®gt are uiKi as switches lük B to K iu ά »ϊ ^ι L, & itua & IIh

are g

slxui. di @ switch 21 "* i uiwi 2iö iss pitch circle 192 de® HÜJilen-Anlaes-Kr®i @ ®a g © 8chloeeea ₀ so that® the mill-Vsravailable-Relaia 2i6 is excited ^ and ύ®η Schalt @ r 21? i »T @ ilkr # is 19 ^ Schliss« t ₀ W®it @ rhia fesworks the © excitation d® »© ntspr®oh®si <l © n Mühl®« = available "R®! ®is> 2.16 that Selii ± © ®s @ Ki d <= © r switch 126 B to K In dem

Generation circuitry «Sa® closing the switch l6o B to K opening the switch l6S.B'ble K in the®Bi Ölfor @ nn« r ~ selector = · circle (Figure 6) as well as the Schli® @ s @ xi the switch 136 B to K and the opening of the Sch & .ltcsr 138 B to K in the mill selection circuit (Figure 7) ο Ö & all © öibrexHiersäts © C ₀ E and J in operation & ind _P are the Brenncsr- Sählkrels-Belai® 132 de-energizes and therefore switches 128 C ₀ 128 E and 128 J in the less Iffipuls generation circuit. In the 9lbr © iin © rffiats- ¥ ählkr @ is (Figure 6) the switches I56 Cp 156 E and 156 J g © 8chlO8S®n and the switches I58 C _s I58 E and 158 J open; and in the Mühl®n ~ selector circuit (Figure 7) the switches 182 C ₁ , 182 £ and 182 J are closed and the switches 184 C ₉ 184 S and 184 J are open »

When the output voltage; the electric generator has been brought to 16 with the dee energy Versorgunge ^ Syetense in phase, last ύ "τ switch II6 in the conduit 112 of the Xmpule-" generation "= circle (Figure 5) closed" If au this tent point the load on the Elash © it se small is _p das® d © s ^; Operation of the oil burner 36 in the oil burners C ₀ B and J is sufficient, the corresponding output is generated on the dl @@ © V @ i «@ under the Κοκtroxl® of the Vor-R @ glers6 20 and the control @ »R © gl © r I06 remains, but if the load increases«, the oil supply is increased

10 8846/023

di © line 50 by actuating the ÖX-gtrßssungereglera $ ü the control of the combustion «-Segler® 20 so long®« rhßht _p until the heat «®w®ri dee doit burners stsgsfüforten oils d®r Sussra® d @r Wärraewerte of carbon "e & _s teprieht by © liier Pulv®rn" wird.zue tTHL "42 in your minimum performance SEttgefüfort & tslich to d & m worth sur ignition serving oil burner, preceded the betätigt® d 'm' Strttanuigsiaeeeer 92 switch 120" I schilpest "2nd Via line 112 a Stroaskr®ie ssura B @ activity biot © r of the Xstpule" transmitter 108 produced wiirdo Hmcsh e ".lß @ r excitation"is'öer Xmpul donor! OS immediately & ut & ® ± ϊι® St & rtgtell ^ m ^ postponed, its function as aissss ^ üfeeiip dl® in it begins b @@ t @ ht _t Sch & lter 136 int © rait tier @ siä for the farmers of ssw®i seconds during a period of 60 seconds to echll @ se®s &; by a pulsating Sohli @ e @@ n the switches l4o and lh2 ± n the oil burner sats-selector circuit and the mill ^ selector circuits is effectedc The operation • »of the pulse generator © 108 is so _p d & it continues» its p »rlo-« diachen ! «Pulse out _c until the state _{9 of} the dl® excitation dee! in addition to the elimination of the availability of all powder coolers kz or J of the oil burner ^ tsej, that the Issrulegeber 108 echlieest the switches 14o I and 1 * »2 so long pulsed» until at a train station _s where [ no mill is yet in operation _s taken a mill in operation I wirdf, whereby the Stronkreis on the line 112 in coil "! | £ raeugun £ 8krele would be interrupted or eo long _c bni a state at dta at least one of the mills is already in operation _e the mean value of the mill load of all mills in operation is below 80 $ of their total capacity, which is due to the combustion «= Controller 20 is determined _c whereby the circuit through line 114 is interrupted "

The pulsed closing the switch 1 ^ 0 by the encoder 108 is transmitted in Figure 6 to the oil burner set-Betätlgunss ^ relay 154 C on the pitch circle 164 _c since under the outlined above conditions this is the einzig® circuit lst _c by the Schlieesen the switch 156 and I60 and opening switches 158 and 162 is closed ₀ you actuating relay 15 ^ C would be normal =

10 9846/0231 ■

weis® initiate the start of operation of the oil burner substitute C, but due to the fact that “the» di®- = s «r oil burner» atζ is already in operation, and that is why it _remained in operation after the end of the heating-up process ₈ , the excitation of the relay 154 C has no effect. Parts of the pulsed closing of the switch IkQ causes the simultaneous closing of the switch 142 to transmit the signal through the pitch circle 170 (Figure 7) to the mill relay 180 D ₀ are Da all® Sehalter 182 and 186 according to the Mtihlen ~ ¥ ählkr "ie to this Z and dl © closed switch is opened 184 and 188 sin.d _f is the pitch 170 of the tile by the einsEig® _c © in current © «can imd d» «half is the Beiais 180 D da® only © Mühlen ·». Activity ^ Kel & is, da. β can be excited «? When the mill actuation relay 18C D is actuated, the mill "Anlaas = switching" r 226 in the subcircle 194 is pulsed? of the mill 42 Ω angesch ^ osesm _c which the Kohlobrennern 3 '* in the set to represent plane D coal charging thereto through dae Schllesean of the switching gates 226, the pitch circle is ^ closed 194 because dl "switch 217 and 22k asuvor already by the excitation been the mill Available relay 216 and de-energizing of the oil burner set number circuit relay 132 g © closed slnd _c so that d @ r mills timer 220 actuates wlrd ₀ remains closed after βeinem Betätigunsesignal and the successive Schliesaen its ang;. esohlor @ enes contact «228 to 234 causes _o

Due to the operation of the mill timer 220, the contact 228 in the pitch circle 19 & ten S / o! ; and then the timer would be closed, so that the magnetic coils 244 are actuated and each of the inlet valves 2.U6 of the burners 34 in the level of the burner are opened . the valves 46 reach their position _tl will uqt end a as sehlag - switch 248 in pitch circle 198 geachlosesnj d & r '~ is connected to each of the corresponding burner- the switches 5? 5 ^ and 2 $ 2 in pitch circle I98 remain closed as long as öas Mühl? * n «Ready -Pvelais 212 _c des an die Mühle 42 D ans: '. h3.essen if? t _; "Ix-excited remains NND the Brenner Ztihlkreis-'Relale I32 _υ with the

109846/0 ??!

C or E connected sizidp abebrind; bi.eiben _o DIEA © switch in the pitch circle I98 and the comparable switches 268 and 270 serve dasu then don _t = Mühlön starting process to be "@ nd @ n _e weim © ine or m®hrer © in the pitch circle 200 required for a safe Mühlanbetrieb been w®ßfallen conditions _p after the mills ^ time = · encoder 220 excited lst _o the timer contact 230 ?? schlisset to "/ hn S®ktsnd © si after d®m contact 228 and warm all burners" open Einlassventil® " ind _D is the circuit to mills' 257-Reiais etätigunge closed ^ whose excitement equal = di * operating d® $ MÜhleniHotor-event switch 258 and the H © isölaft- = Magnafschalters 260 causes _P uza the engine 254 at * = down and excite the hot air t <magnet switch © r 256 so that the Helsslu? t connected to the dl® mill k2 J) becomes <~ Vdntll 68 g® & ££ n @ t. o The excitation of the R © laie 257 also causes the sehlieasexi de © motor switch 262 of the conveyor link in the sub-circle 20O ₀ The sub-circle is priced seconds after the operation Bg dos relay 257 duroh the timer contact 232 g = © da © e has been found that ₀ thirty seconds to the mill a sufficient "for your business aviation

no The closing of the tail circle 200 causes that of the conveyor motor ^ Anlaiss-Rölals 266 ₀ which closes the motor Aiilaee = 267 , whereby the conveyor motor 5 ^ is actuated and the puivermünl «42 D broken Kohl® clocks ₀ The relay 266 is also used to close © "the switch 274 in the part"

S02 _c so that the MUhle »Xn» Betr'i <s ~ b -Relaie sixty seconds for Batäti ^ tsng of the conveyor motor 5 ^ through Schlieseen dee

ktffis 234 can be excited «The excitation of Beiais 272 causes the opening of the switch« ro 218 Io pitch circle 192 <i «3 Mühi.esi starter circuit ₀ whereby the mill availability relay 216 is off (örr®igt and the switch 21-7 in the partial circle 19 ⁵ H the switch I26 D in the Isnpulis generation circuit (FIG. 5) _c the switches I60 D ± m Ölbr "mierijat ^ - ¥ ählkr" is (FIG. 6) tsad the switch 186 D in the mills Wahlkreis {Figw 7) opened · - and the switch 162 D in the Ölbrenneraat * ~ Vählkra ± 8 and the switch l & ^{8 D ± n} HUhlen-Vählkreie are chloeeed o By the excitation of the relay 272 the switch 118 D is also in the line

1Q9846 / 0731

«30 _-.

of the Ißipulß-Erseugungekreiaes opened and the switch 124 D closed in line 114; so that pulse generator 108 de-energized · and the entire further control of the mills from the line 112 to the line 11 ** of this circle (Figure 5) transfer

If for some reason the Mühle h? _ D will not be in operation karm _c is the Mtihle-In-B "trieb-ReIaie 272" borregt and five seconds later after the timer Kon takt®8 2? 8 closes that would mill Absciialt-Paleis 280 © rregt and dan Schaltor 282 in a circle I90 8ffn®n _t so because "mILL-Berait-Rolais 212 and Muehl @ <= Available-Rel" .t © 216 energized wirdo slide Aborregwng of mill ^ Vsrfügbar ^ Relale 216 would open the switch I26 D in the itapula ^ Erseugungskrels _£ da * Open the switch I60 D in the Ölbresmeraatis constituency and open the switch 186 D in the mill constituency and close the switch 162 Ώ in the Ölbrennorsatz ^ selector circuit, and 188 D in dam mills mode selector circuit b @ virksn "the dignity di" mill kZ D connected Mühl9 "not excite in" Betrisb ™ relay 272; bliobe eggs encoder 108 excited "because the switch ± n the line 112 d-sa liliesaung the switch Ik2 ornciut pulsed Since the switch I86 D in dt & m Mtihl «n» WShlkrdla is now open and the switch IQ8 D feschlosseii 8in'd ₀ \ ± rd the pulse sum Mühlen-WiUtI-Heiais I80 B transmitted, the the starting process of the effort *. « h2. B triggers ^ which the Bremer dee Xiifc.l © "Brsxinersatsss B supplies coal ₀ in the middle of the MUhIen-Anl & sekreis (Figure 8) which is connected to the MUhIe 42 B in the same Wwlae» as it smror: for the Anlaset) η the mill h'i D

wUrdo.j. Voiui the Hülilo hz B is ready for operation ₀ your MUhlsn-Afcaehalt-Rslais Z30 eln hundredfUrAfsohn ■ seconds after the start of the svaiten impulse was excited «by the time

109846/0231

Open the switch 126 B in the Inapuls-1 rzeugungskrsi® 186 B in the Ulbrennere & tss-Wahlkreie and 186 D in the Mühlen ~ ¥ ahlkreie and close the switch l6z B in the Ölbrennersatas "constituency and 188 B in the MUhIen <= electoral circle ®ie been taken to effect "Ba to jetst no mill is in operation iat _r the pulse 108 remains energized and even" in further pulse is generated "by the switch 142 (figures 5 and 7) su's.chliesseno the Schliesotm de" switch 142 now generates a pulse γ which is transmitted to the mill dial = R®laia 180 F and then to the mill- ¥ & hl = Steles.is 180 H and 180 K in succession, and zv & v in the case ₀ the in the The following mill is not ready for operation

Assuming that the mill k2 D has been put into operation, pulverized coal is fed to the burners 3 ^ of the coal burner set D via the associated line kk o In the combustion chamber, the coal is ignited by the burner "} 6 of the oil burner sets C and E, and so the first Coal burner etch put into operation ^ It is noted that a single oil burner is sufficient to ignite the coal flowing out of a charcoal burner set 3 ^ Due to the spatial arrangement of the burners 32, the charcoal burner etch D is located between the oil burner etchings C and E and can therefore be removed from one of these two sentences can be ignited =

When the mill h2 D is put into operation iat _P , the switch 118 D in the line 112 of the pulse generation circuit is opened by the mill ^ a operation relay 272, thereby interrupting the circuit and de-energizing the pulse generator 108. “At the same time, the switch 12k D in the conduit IXK closed and the operation of the pulse generator "108 of the line 112 transmitted to the line 114. After the mill and its Registered Assigned set has been removed from coal burners once in Betrisb _t unterlia ^ * their operation continues the control of the Verbrennungo ^ Poglere 20 - which depends on the coal feed sur mill and Ίεηη to the burners

of the requested Lei "tung the unit regulates _o Verbrennunge" regulator that it excludes at this time first, the main supply "Ölventlle 96 in the three oil burner propositions and blocks thereby the supply of oil through these valves from ₀ However, there is further toward a Öletrömmg by each of the tributary ~ Str <imungsreßler 94 _C bo daes the oil continues with a Mindeetdruek the oil burners 36 ssuetrüatto This oil flow is sufficient "to maintain the Flaora® burners and to generate sufficient ignition energy for a neighboring group of cabbage®- burners? Next, you read the combustion; "" Kegler 20 all tributaries "valve" 94 except that of the oil burner cores C ₀ which is assigned to the coal burners Jk urn set D The oil supply to the burners 36 is interrupted by a partial circle of the combustion controller 20p which does not form part of the present invention and is therefore not described ieto

At this time, the control of the operation subject of the mill 42 D to the combustion controller 20 _o With increasing loading of the unit, the speed is dee motor 54 of the conveyor 52p of the mill listened 42 D "vergraseert _p so that the mill increased Kohletaenge is supplied ₀ When the load on the mill reaches 80 % of its capacity, which is determined by the speedometer 6k _c the switch 122 in the line 114 of the Impule ° generating circuit is closed and the pulse generator 108 is _{reset 0} Then it starts its operation and energizes the relay I38 and at the same time actuates switches 140 and 142 of the Ölbrennereatz selection circuit and the MUhIen selection circuit with an impulse in 60 seconds «»

When the switch l40 in the oil burner switch selector circuit (FIG. 6) is closed, a current flows to the relay l $ k C, since the switches I60 B and JL60 C are closed. the mill 42 is operational and the Ölbrennereatz mode selector circuit is not switched off 'lf ₀ However, since the Ölbz ^ ennefeatz C iet already in operation _f is the excitation of the relay _o 154 C no effect other hand, in the mill Vählkreie (Figure 7) is determined by the Schlleasen of switch 142 of

1ÖÖÖ46 / 0231

Pitch 172 to energize relay dee 180 B closed as the switch is closed 182 C for the reason ₉ well of Ölbrenneraatz provides sufficient for ignition of the associated coal burner power and the switch 188 D is closed "because the mill is 42 D now in operation and therefore cannot be put into operation again <> The switch 188 D was closed, when the relay 217 of the mill 42 D was de-energized and the switch 186 B is closed, because the relay 217 of the mill 42 B is energized _e and Although due to the fact ₀ that its mills 3 © tatigungs relay 180 B is energized and the switch 218 "indicates ₀ that the mill is not in operation _P is closed * by the excitation of the mill Anlaes relay 180 B is the Switch 226 in the partial circle 194 of the mill selector circuit (Figure 8) of the mill 42 B pulsed so that the timer 220 is excited and the starting process for the mill 42 B is triggered »The starting of this mill then runs on di e same way & To _g as it was previously described for mill 42 ϋ. After the start-up process, the mill = »In => operation = relay 172 is energized and opens switch 218 in partial circle 192 to de-energize mill-available relay 216 as well as switch 118 B in line 112 of the pulse generation circuit and it closes the switch 124B in the line II4 _o When the mill-available relay 216 is de-energized, the damage 126 B in the pulse-generating circuit _ß the switch 160 B in the oil burner set »selector circuit and the switch 186 D in the mill selector circuit closed and the switches 162 B in the ÖlT> renn Ersatz-Wahlkreis and 188 B in the Mühlen-Wählkreie openρ whereby the constituencies are prepared for the next " pulse generated by the pulse generator 108"

When the burner 34 of the coal burner set B has been put into operation, "the switch 122 in the line 112 of the pulse" = - generating circuit "e is opened * since two mills are now in operation and their average load is less than that for one Closing the switch is required 8o # « Opening the switch 222 interrupts the circuit through the line Il4 _p so that the pulse generator 108 is de-excited

1Ö9Ö46 / 0231

- 3k ~

In dom Fail ₉ the mill that 42 B inoperable let _p ent "not veil the .notwendigen conditions are not met or because some part is not working properly ^ after the shift" running began in the pitch circle ₀ is the mill Available relay 216 de-energizes and closes switches l6o B and 186 B and also switches 102 B and 188 B in the corresponding constituencies When the first © happens _? If one or more of the switches 2o4-210 does not close in the pitch circle I90 and excitation of the mill <= B @ reit ~ Relai® 212 is prevented opens d © n switch 282 in the pitch circle 190 and daa mill ~ Ready <~ R @ relay 212 is off, "rr®gt _o such a process would require" the "another set taken from öibrennern 36 in operation before _ff another set of coal burners 3k start operating can can _© ε therefore produce namely _e because the rate of oil burner "at the level of G only for the burner 3k coal burners on ά®η levels B and D DI® necessary Zündungaenergi ₀ Before el & o dl® coal burners of set F can be put into operation? the oil burners 36 of the set £ arbelten ₀ so that the burners of the set F can be ignited0

The oil burner of the set E are thus a Commission? that the switch l40 is closed and the entep-calculating "impulse to the oil burner sat2" start-up = relay 15 ^ S is sent ₀ to cause the ignition of the pilot burner kG subordinate to this set and to run the ο! burners fuel _o When the oil burners of set C are working, the mill © k ?. D is in operation and the mill h2 B cannot be put into operation _t this happens because the ύ®τ Tellkr «ie, l66 in the Öibrennereatz selector circuit the pulse now from switch l4o to the relay 15 ^ E via the switch 162 B ₀ 162 D _s l60 F and 156 E 2sul®it @ t _e which are now all closed. The switches 162, B ηηύ 162 D are closed because; di® assigned to them Mühle-Verrügbar-Relais 216 & hBTV @ &% sistdo The Sehalter I60 F is closed _p because its assigned relay 2l6 © rr © gt and umr switch 156 F

109846/0231

■. ■ - 35 -

Let closed * because the burner counting circuit relay 132 connected to it is de-energized and thereby indicates that the oil burner of level P is not switched off from operation _{and the} excitation of the auxiliary 138 by the pulse generator 108 therefore causes the switch 1 to be closed 0 and the resulting impulse is then sent to the relay 15 ** £ to trigger the process of the oil burner 36 of the SatE®s ÜD Jeu, fel © lt®t _e Da® starting the oil burner & this is caused by ₉ that the inlet valve 98 ( Figure 4) of the set 102 is actuated and opened -Be DI® Ventil® the pilot burner, and that subsequently the spark plug 104 to ignite the pilot burner gesetst under Strcia ₀ which in turn ignite the oil 36 flowing from the burners "When the burner is set in operation enjoyed »In the mill» constituency, switches 182 S are closed and dl © switch 184 E is opened «, PUr starting up an oil burner set takes approximately 50 seconds« With the next pulse 60 seconds after the "previous one generated", the partial circle 1? 4 can route the pulse from switch XhZ via switches 188 B ₆ 188 D ₀ 182 E and 186 P "to grinder starter relay 180 P". If the relay 180 F is energized and ύ®ν the mill system controller of the mill kZ T is operated »the start-up process of the mill then proceeds in the same way as it was previously described using the mill hz D ·

When the mills 4Z B and kZ D and the coal burners 34 of the sows B and D, which are fed by them, are in operation and the load on the unit continues to rise _f so that another j set of coal burners 34 will be in operation the mill 42 P is put into operation in the same way "as described above _c by the fact that the first pulse generated by the pulse generator is sent to the oil burner & ta-anlaee relay 154 E and the next" pulse then to the mill <-Anlas8 " Relay I80F is fed o The partial circuit 164 can no longer pass the pulses on, because the mills 42 B and 42 D are in operation and the switches 160 B and I60 15 are therefore open. Same =, when wet, the pitch circle 168 cannot pass on impulses »

103846/0231

since the oil burner set E is not switched off and the grinder 42 F is ready for operation and therefore switches 158 E and 162 F are open «, After the switch 104 has been closed, the current can only be switched on via switch 162 B" I62 D " 160 F and 156 E to relay 154 E fHessen and thereby start the oil burner 36 of set E. When the pulse generator I08 generates the next pulse, it is sent from switch 142 to the mill circuit via the pitch circle 1 - 4 the so holder 188 B ₉ 188 D "182 E and 186 F" which are now all closed and fed to the relay 180 F for excitation _p in the same way as described above and the starting of the mill 42 F proceeds accordingly _o

When the coal burners sets B _r D and F are in operation and on the basis of a further Belaetungssteigerung commissioning a further coal burner set is required ", the oil burner 36 dee set J approached and anschllessend the mills is 42 H or 42 K in operation taken vegetables to the procedure described the mill first genoanen 42 H in operation if they iet not ready _c takes the mill 42 K to operate on "This is done folgenderraassen1 the pulse generated by the pulse generator 108 after the Schllessen the switch in Xmpuls-Erzeugungskrels after Schllessen the switch l4o via The pulse passes through the switches I62 B, 162 0, 162 F ₉ 160 H _p 160 K and I56 J "which are half closed" because the mills 42 B _v 42 D and 42 F are now in operation and therefore cannot cope with an additional load «so that their respective relays 216 are de-energized and the S The switches I62o connected to them (are therefore closed because each of the mills 42 H and 42 K is ready for operationf their respective relays 216 are energizedf so that the switches I60 connected to them are closed ot) & the oil burner set J is not in operation When switched off, the burner connected to it is de-energized and the switch I56 J closed

109846/0231

The oil burner 36 of the set J is put into operation and ₉ the next Tom pulse generator 108 is generated via the switches 188 B ₁₇ 188 Dp 188 F ₀ 182 J and 186 H of the pitch circle 176 and the mills «constituency denr; Mühlen-Anleeo-Relais 180 H supplied «which triggered the start of the mill 42 H

If the Mühl® 42 H is available for operation iat _p no current flows ssura relay 180 K _n because the switch 188 H is then open, but if the mill 42 H was not ready for operation, the switch 186 H would be open, which excites the relay ISO H is prevented and the switch 188 H ₈ which is actuated by this relay _D but has the opposite sense as the switch 186 H _c is closed and causes the relay 180 _{p to be} energized which causes the start- up Mill 42 K triggers «,

After the mill 42 H has been put into operation _P is the switch 186 H by actuating the relay 272 in the pitch circle 20? open ^ which in turn opens the switch 218 in the partial circle 192 and the relay 216 is de-energized _o opening the switch 186 H causes the switch 188 H ₀ to close so that the relay 180 K on receipt of the next pulse _P generated by the pulse generator 108; , is prepared o If a further increase in loads requires the commissioning of yet another coal burner «set ©»; therefore causes the excitation of the pulse generator β 108 to generate a pulse ₉ that is received by the relay 180 K ρ to start the mill 42 K and to put the coal burner 34 of the set K into operation _D

Ee has been so electromechanical described a '' control system ^ for automatically controlling the start-up of burners of a coal-fired _p Much = burner »Steam generators» ,, the ■ by ei.ue simple design and effective and flexible operation characterized isto With the present invention, the multitude of powder mills which determine the operation of the coal burners in the firing - ayetem of a steam generator of large capacity - are controlled in such a way that only the set of coal burners is in operation

10Ö846 / 0231

is taken; who also lacks safe operation. The system also has devices that secure the ₅ "e"ir; .he loads increase even accounting wlrd _worn; . when the suagevnhite set of burners can not be operated _r namely that dadurchp automatically another set gevühlt and wirdo put into operation, if the invention in connection with Analog · Heglern for controlling the burner operations hm na following its commissioning, it is used _f can by them a total automation of the Branner plant can be achieved by Daiapf producers {..roeaer capacity,

Eo is understood that the dor SLCH _D invention illustrating details described .; Materials and arrangements of parts can be changed by those skilled in the _art without departing from the scope of the invention

Appendix 5 sheets of drawings with 10 figures Ik claims

Claims (1)

Claims JL /) Electromechanical «control system for the combustion chamber of an automated steam generator a with powder mills fed coal burners _c that of other, jb ₀ B ₀ oil burners with the analog; the operation of the mills and the burner elchern and the automatically determined coal mills and burner depending on the Belastungeechwankungen and certain operating conditions in operation nlRrat _c characterized ,, DAEs a Feuerungs-ltegler (106) via a impulsgeβteuerten oil burner "mode selector circuit (Figure 6) with a large number of oil burner control elements (15 ^ C, Hk E ₃ 15 ^ J) and a pulley-controlled mill ring (Figure 7) with a large number of sahl von KohlBÜhlen »actuation leather (l8o O ₇ 180 B cooo) 1st electrically connected and that the pulse-controlled circuits (FIG. 6 ( FIG. 7) are excited synchronously with one another by a pulse generator (10 8 _P 136 _t 136) which, via a series-parallel connection (FIG. 5), has a large number of Switches (116 _g . _E ... _p 122 «)" their open and / or closed positions the load «fluctuations and indicate at least some of the operating conditions to one Power source connected letο 2 ") Elektromechanisehe system labeled in according to claim 1" characterized "is characterized in that the itmpulageeteuerte oil burners 6)" constituency (figure from a plurality of oil burner Bettttigungekrelsen {L6K _p 166 _P 168) ₀ each having an in series with its respective oil burner -Botätlgunglled (15 ** C « 15k £ ₍ 134 J) switched» normally open. Switches (156C ₅ 156 T., 156 J) depending on the operating conditions of the oil burner contain 169146/0231 3o) Electromechanical ^ Hegelanlage according to claim ■ 2. _t thereby ge = characterize ^ das8 the pulse-controlled oil burner selection circuit (Figure 6) continues in all oil burner actuation circuits (164 ^ 166 ₁ 168) normally open ^ from the operating conditions of the Mill-dependent switches (l6o) and in all oil burners ^ actuating cranks (l66 "168) bie on a normally closed ^ switch (I62) dependent on the operating conditions of the mill, and that these switches (160ρ 162) ensure through their interaction that the Oil burner actuation members are energized in a specific sequence ο ko) electromechanical © control system according to claim l _s 2 or 3 ₀ characterized; that the pulse controlled mill control circuit (FIG. 7) consists of a large number of mill control circuits (170 »172 _P 17 ^ ₉ I76), each of which is linked in series with its corresponding mill control (180 D, 180 B _c 000) switched ^ normally "open" switches depending on the operating conditions of the mill (186 D ₀ 186 B, 186 F _£ 186 H _c , 186 K) 5 ») Elektroaechanieche control system according to any of claims 1 - in Af characterized _t that the pulse-controlled muhi ene" Anlas skr ice (Figure 7) further actuation circuits Muhlen (17O _P <> ..) uffneten a normally g "at least in all" on the operating conditions of the oil burner dependent switch (182) and in all mill actuation circuits (I72p 17 ^ p 176) except for one? _f normally closed on the operating conditions of the mill-dependent switch _c (188), and in that these switches (I82 _f 188) secured by their Zueamiaenvlrken? that the Mühlcn actuators (I80) after the oil burner actuators (15) are excited " 100046/0231 -. ■ .'- 41 - 6o) Eloktr © mechanical control system according to any one of claims 1 - 5d d-a characterized _{ that the series-Parall®l ~ circuit (Figure 5) in a first parallel = · line 4 ^ 1 * 0 ® »a normally open switch (122) contains _P which, depending on changes in load, divided this line (il4) at a certain load value for the pulse generator (I08) 7o) Electromechanical © Regelanlag © according to any of Anspi'üch © 1-6 _r characterized ₉ that the series-parallel circuit (Figure 5) i ^ a second parallel "= line (ils) a normally open switch (ll6) © athältß the depending on the synchronization between a generator (Ho) and an energy supply system, this second line (ll2) for the pulse generator "provides" before a mill (42) is put into operation " 80) Elffiktromechanische Rogelanlage according to claim 6 and 7p characterized ₉ that the two lines (112,114) parallelgeechaltet _f the first (.114) ge in series "a group of switches normally open ^ unterein = other in parallel and ent at start-up"? · Speaking Mühlen calibrated sender switch (12 ^) and di® siiQite line (112) connected in series a group of normally closed? _{c connected} in series with one another when the corresponding mills are put into operation would contain a gap gate 9o) Electromechanical ^ Regolanlag © according to claim 6 and 7 or S _0, characterized in that the Serion-Parallel = circuit (Figure 5) also contains groups of parallel connected switches (126 _C 128) and that the groups in series between the Lsituxtgen (112p . Il4) and your impulse generator (108) let « 1G9846 / Ö231 10 «) Electromechanical« control system according to any one of claims 2–9, characterized in that a few of the oil separator actuation circuits (166 ₉ 1 <£ 8) contain switches (158) that cut; that after the failure of an oil burner activation element selected for excitation, a pulsed signal is sent to a further oil burner activation element. llo) Electromechanical control system according to any one of claims 4-10, characterized in that at least some of the mill actuation circuits (17? ρ 17 * 1? 176) contain switches (l8ö) which ensure a pulsed signal if a certain coal burner fails the actuating "- a member of a mill fed _e is the another coal burner fed ₀ 12o) Electromechanical «control system · according to any one of claims 1 - 11p characterized by sensing circuits with Rolaie (132» 212 _C 216p 272) ϊ which «switches depending on the operability of each oil burner _f the operational readiness of each mill o the operating status of the oil burner and represents Operate grinders ο 13p) Electromechanical · bowling system n & oh any of the preceding claims? characterized in that the pulse generator is a driven by a motor switch "contact (136) 1st" energizes a relay (133) periodically _p which via "a contacts (ΐ ** 0 _Γ l42) the oil burner-Wählkrela {ikk) and Mühlen-Arilasskreie (l * t6) excited Elektroiaechaniechö control system according to any of claims 1 - 13 _r characterized in that for each mill (42) ^f a mill Anlaeskreis (Figure 8) is provided _p of pax of a plurality with each other * allelgeschalt "ter pitch circles (I90 - 202) consists ₉ the sequence of the start-up program of the corresponding mill depending on a mill-ready 109846/0231 Relay (212) control that filled indicating _Ρ whether the MUhIe all the necessary conditions 109846/0231