DE1551947A1 - Electromechanical control system for steam generator - Google Patents

Description

1 155 * 947

BW 524 / CE 2784

30ο 6.

kö / ko

Applicant: Combustion Engineering Ine ο ρ Windsor Connecticut. UoFoA ₀

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 _p which automatically starts the burners of a coal-fired multi-burner system of a steam generator depending on an increase in the load "

In recent years it has become common to control the firing of thermal power by a 'central control Raul from ,, where various instruments _t for at "showing the operating conditions of the unit are capable for _p, B ₀ Meters ₈ indicator lights and recording equipment together are arranged with control switches for the operation of the lighting devices. In such devices, the operating personnel perceive the steam boiler, the operating status of the plant and if deviations from the desired operating condition occur, suitable control switches are manually operated in order to regulate the firing system in such a way that the deviations are corrected · Decision de «/ left to operating personnel and is therefore human» Vsr-

100845/02 31 bad original

1 155 * 947

• «(• η exposed * As the size and capacity of the The number of measuring devices is also growing and the plant parts that are being monitored and kissing it will it is becoming increasingly difficult for the operating personnel to control the power plant more elcher and economically. Therefore there is one growing demand for automation of "he units" to relieve the operating personnel and to ensure the safety and economic efficiency of the operation of the power plant « The invention is aimed at this concern »

The invention is intended for use in power plants, which contain steam generators and use coal as their main fuel. The lighting system of such a unit consists of an arrangement of coal buckets <, dl · during the normal Work in the load area of the steam generator and from an auxiliary system old oil burner «, which is used to heat the a» the required heat before being sent to an energy supply system connected wlrdo The oil burner system delivers also the energy necessary to ignite the coal burner «Die Powder mills, which feed coal to the burners, are regarded as part of the furnace "because the operation of the distillery depending on the operation of the powder mills' regulated wlrdo

Together with known combustion regulators, the " underlying invention to »the control and steering one? Firing system of a large capacity steam generator to be carried out with a minimum of manual supervision Combustion controllers are analog controllers and the work of the burners in operation depends on fluctuations in load rules £ the present rule system consists of an improved one Type of digital control »which is safe and economical when the load is increased further burners in Starts operating ο

According to the invention this is done by a control system for the combustion chamber of an automated steam generator fed by powder Muhlen _p coal burners of the other

1098 AS / 0231 ^ß AD.o _{R / G1N / U}

Zc B "Oil burners have been ignited _p at the analog control a power output corresponding to the load fluctuations

The control of the operation of the mills and burners is ensured and the automatically determined coal mills and burners are put into operation depending on the 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 Detachment links. and is electrically connected to a large number of coal mill actuators via a pulse-controlled mill starter circuit and in which the pulse-controlled circuits are excited synchronously with one another by a pulse generation _P which is connected via a series-parallel circuit of a large number of switches _P whose open and / or closed positions indicate the load fluctuations and little stone indicates some of the operating conditions is connected to a power source

The cone system according to the invention are devices _r on _s supplying burners of the need for start-up of groups of coal "and depend on commissioning a suitable group of ülbrennern and then triggers the start-up of the coal mill * c coal such a group of burners, the ignited burners of the in-service group of OX = wirdc addition are intended to monitor devices around the plants readiness of the oil burner and the mills and around the Batrieb such a group of oil "burners only auesr.ulösen _r when it is ready and when the coal mill is also ready for operation _c which is connected to the coal burners _t which is ignited by the group of oil burners o further devices are provided ₀ in case the selected burner groups are not ready for operation? to put other groups of oil and coal burners into operation ο

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

^lar: 1098 4670 23 1

BAD ORlG ¹ NAL

155 * 947

- k

1: an echematic representation of a power plant according to of the present inventor> m £;

FIG. 2 is a schematic representation of the typical combustion systems in the corner of the combustion chamber of the steam generator of Figure 1;

FIG. 3 shows, schematically, a typical coal powder mill for use in accordance with the present invention;

Figure hi schematically gin oil supply eye system for use according to the present invention;

FIG. 5 ^: Schiaatiech the circuit of a pulse -> experience circle of the present power;

FIG. 6: the circuit of the oil burner satx selection circuit; FIG. 7: the circuit of the mill electoral district; Figure St a typical MUhI- »starting circle {

ijtir 3i a typical burner r * Zahlkr air to use the vox lying:.!

Figure 10: Schematises a · Mühle-In-Ddrieb Rückkopplun ^ srelaiaj Figure ll: echeff.atiecii «in Mühle-Available-RelaiSo

General arrangement

1 shows a thermal power plant 10 _r DAA according to the present invention operated wirdo It consists of a "steam generator and a turbine Ik _t is an electrical generator 16 drives," Analog ~ regulator in the form of a steam discharge controller 18

109848/0231

ORIGINAL

and Aine ^ ztaErnfungsreglera 20 are used ;, the force "w" rk according to the changes of the requested power to regelno Dieso Heßlar oind of bekannterKonetruktion and form no part i'.ar present invention ₀

Steam generator is 22 ₉ lined with flüsslgkeitsführenden Rohran Zk ieto .ν of a combustion chamber in the tubes 12?. Χ · ώ high temperature steam © raeugt _s and then via the

the turbine I ^ asugeführo Xn the line 26 is a 28 arranged _t depending on the

In order to regulate the steam supply for the turbine, a pressure sensor 30 is also arranged in the steam line 26 via the disconnector 20 to transmit a signal. can _ö This desire is used to adjust the liquid and fuel supply of the steam generator 12 _ϋ so that the power required by the turbine is delivered »

Bas Fföuertän ^ ssyetam ά®β steam generator consists of burner arrangement @ n3 ^ 3 which work in the heating chamber 22 "Xn dem darge", sfcoHt "β embodiment of the invention, the burner arrangement 32 are arranged in each of the four corners of the combustion chamber and the Bronner fire tangentially. Each arrangement 32 consists of alternately vertically spaced brasinsr η Jk for pulverized cabbage β ^ of oil runners 36 and auxiliary air nozzles 38. The details of the construction of these burner arrangements are known and their description is not necessary for understanding the present invention. The burners are arranged in sets on eleven levels AH and J ₈ K ₀ L ρ ν1® os is shown in Figure 2 o Each set consists of four burner nozzle ^ of which one is arranged in each corner of the iJrejrmkaiiiiaer 22 o On levels A ₀ G and L, these nozzles 38 serve to supply auxiliary air for the combustion into the combustion chamber 1 on the levels B ₀ D ₀ F ₉ H and K there are coal _{burners 34 and in the levels C 0} E and J and oil burners together with theirs Pilot burners ^ O arranged. Any set of

'10 * 846/0231

BATH ORIGINAL

155 * 947

■ 1

c 6 -

Coal burners 34 is of Kohlenühlen 42 ait their Zueatzaeer "g" t "n fed through coal supply pipes 44 ,, dl · old B _{r # nn>r"} inlassventilen 46 (Fieur 3) au for regulating the coal supply each of these burners are provided "Each set Ulbrennern 36 is fed with oil via an oil supply line 48 which is connected to a main oil line 50 (Figure 4) »

Cabbage feed system

FIG. 3 is a schematic representation of a typical coal feed system; the powder of the invention for iufuhr * »ieiorter coal to the burners 34 of each of the Xohlebrennersätze B ₉ DF ₀ H and K used _o Ee is composed of a carbon powder mill 42 $ of the broken by an unillustrated Saniiaeltrichter coal via a conveyor member 52 supplied _r which is driven by an r sgelbaren motor 54 'the pipes 56 and 58 include power-operated intake and exhaust valves 60 and 62 and connect the conveying member 52, the funnel and the MUhIer 42 «the speed _r old of the throat of the burners 34 fed _P is regulated by the combustion controller 20, which changes the speed of the motor 54 and switches to di-jat; U'eiea the feeding of the broken coal into the mill V2 and it also regulates the feed to the burners. Can f as "provided is a Geschwindigkeiteeesser 6k or derglc group; use u, a coal supply appropriate" return "coupling ^ signal back of Verbrennungaregier ZO to transfer, the toil '42' Leisee air via a line 66 with one.! supplied to the power-operated valve 68, "This air is used both for drying the coal in the mill as this" causes the pulverized coal to the burners 34 in transport <> Lotxtdres is achieved by a fan 70 _£ the hz between the mill and the line 44 is turned on ieto a power actuator: Lgtes Mühlenauslaasvantll 72 lot in the. Line 44 arranged after dea fan 70 and serves to the line for the

1QÖ0U / 0231

158) 947

Carbon "feed opening au or echlieeaen _o The temperature of the mill air is regulated by the supply of cold air over, rush line 7k, which led to an" A kraftbetfctigten valve 76 before the mill in dl · Heise air line 66, the entire Luftaufuhr the mill is governed by the Verbrennungβregler 2C Ube # ₉ flaps 78 while the temperature of M'lhlenluft e Inst ex your development of Heisa- and Kaltluftklitppen 80 and 82 through a controlled w.ird Huhí enluft "" tempera ture "R" gl ar Bk _p which a feedback "signal a van ^ is arranged for the temperature of 86 MUalenlvft erhSJte

oil supply system

.r k let a sohei & atiaone of the “division of the oil supply eye systems, in the preferred exemplary embodiment of an invention

virdo Ke consists of a main oil line 50 "which in general" is connected to all oil burners j6 .) ed "n ülbr" rriereatzea C _r £ and J is connected in the line? 0 is a force; actuated "oil" Regulating valve 9O disordered ₉ Una tie oil supply to the. Burners 36 under the effect of the exot-nnungereglers 2O regulated "or actual value d" r Uletrüaning in ö ^ r line 50 is a Struzungsmeseer °.? ₀ determined de ^ AEN signal as Bückkopplungeeignal 'for the combustion controller 20 dient- A Nebeneääias-> Strumungsregler 9 ^ li "gi parallel to the valve 90 and serves dascu ₀ the Oegenvart a Minriestfcld-ucks in the leading to the burners 36 ^ Leit juig to β ichern _ε gl el Ch ₁ ^ ₀ tVItIg which position valve 90 dan einnias.t _c wenr the oil feed "- eyetera in operation _o This Mimioat <?! pressure iet _p • that of the rioruarlich: Let ₇ to atomization of the üronnern zügefülirten oil to gew & hrleiaten ₀ eo dae · this is leioJ \ t can be gekündet _o In the present AuefUhnngsbeiepiel an oil pressure of approx & hr seven Uta (lOO p »i) except as looked-calibrating

Dx * line 50 carries the 01 to each burner set C ₉ E and J via branch lines kS xn _s, each bit of which is a force-controlled

1038AS / 0231

BATH

Actuated valve 98 equipped iet ₀ Gleiohermaeeen iat every oil burner. 36 is a valve 100 fitted? which cancels the operation of its burner including occurrence of an unsafe Bstriebszustandes _B by a connected control "device, (the 1st not shown), is determined is carried out" The ignition of the burner 36 ko by a pilot burner ₉ is allocated to each burner "Zuai purpose of Brief description, only one such pilot burner ko is shown in Figure k «Each ignition burner 4o _p, which is usually fired with gas, has a fuel valve _{102 and a spark plug 1Oh 9} which are actuated when the oil burners 36 are to be ignited« »

The oil burner system of the Plgur h is used to generate combustion energy in the furnace body 22 during the warm-up phase and to produce the ignition energy for the coal burners 3 * »during normal operation of the steam generator independent assistance controller (control sub-loop) controlled _t which each oil burner nlsnt in each set in a specific Sequence · in operation "so the temperature that dee steam generator each, and after up to ssiner Mjndeet ~ £ etrlabetemperatur erhöhtο to describe the present invention, it is notverdiß to understand-that then ₉ when the steam generator starts its Betriab _r - after <ier Anwäre _process. which is closed _for the synchronization dos elektriochen Gwiiex & rors Io ends - allr Ölbrennei-SFIT u * C, E and J during their B * trieb3 untai control d 's / ezbreanving * retlers HO fi ^ d * n iiTid long as ia Operation blexbeii- to the "Frzeufuntc der Vjrfccenn" agBi "n" rgie in the combustion chamber Z2 is taken over by the Kohlsbrern ^ r-Arala. This invention is ο

109846/0231

155i! 947

Control system

Bonhfilb Ainet gemäsß the present invention devices Vcrg "eeh * n _$ which each satellite χ of coolness burner" B _t t> _{p 0} F H K urd safe and more «« si In tetriab iiehueu _0. although automatically; without the need for manual monitoring lato

Devices beetäneji from elnea digital regulator with fixed

the Kahlo powder mills. 22 "dia r" each set of vph K ohl oil burners η connected alndp Depending on an increase in the required power, the damper "eu £ © r" starts up _o The Mühion k2 are put into operation in the following way In preferred Auef'iiiruiißibeiapiel dor result Jj-B ^ _o FHK consists They R ^ elvorriclitiingan according to the invention vox'liogonden t "" t "n the state of each Mühla hz, and n" HFT "tsi a ± m only in operations if the state her ο in ^ betriebntfhwe gemfcmttet »Ze case _p de.ee one or more of Mtae>» len in the wake of a secure establishments are unable or veiui iiire, Betrlebsbereitechaftp Ka B, for Vartune ^ örbelton, -unterbrooh ^ n been iet _t Can the Regeleyetein eXn «look for another mill in the sequence _p which can be driven *» and it is in operation nofrfitehp oo da ·· an increase in the specified et «ng Reohnuag wlrd _o

Obvchl biii the described implementation example of the invention dots Fe ui; runge system five levels νο: τι coal burners 3h, Aval Sboncn of «! burners J6 and three levels of Luittiüisivn 36 contains; where the individual eleib & rita of each level are arranged in each dex viei "Eckeii cifsr Brennkammor" ind _f it is ₀ that clique arrangement is only used for the awakening of the Veruneohaulichun ^ r and that ·· according to the present emptiness «» inβ grusssre or small «! '«» Anasahl of levels can be used «

Feuerungar e # ailusig

Xn Figure 1, a fire erosion IO6 is also shown _f the cure control of the operation of the cooling hz is used, which salnor-

109846/0231

BATH ORIGINAL

The combustion controller 106 works independently of the combustion controller 20 o The combustion controller 20 is an analog controller and controls the operation of the mills and the burners depending on changes in the state of the system _o According to the invention, the combustion controller 106 is a digital controller with fixed program and its control functions which are the Verfr ^ annungsreglers 20 superimposed ο particular means _c that the Verbrennungeregler 20, the supply of working fluid, however, namely, fuel and water to the steam generator as a function of Belasfcungsänderungen regeltο the combustion controller independently kz the number of Kohleipulvermühlen and _s are put into operation, therefore, the number of coal burner changes ,, ₀ It is to take on the task de <s firing controller 106 _P mills hZ and the burners Jk in operation and the combustion controller 20 to be "

to regulate these mills and the burner drive ,, v "nn she Workers To this aim wird- reached, the combustion controller 106 determines zunächsta when the need to use additional burner in operation to take _p auftrittο Naohdem has been determined that additional burners are _c necessary , the combustion controller 106 determines which of the mills k2 is ready for operation and is thereby charged _a whether a sufficient ignition energy from the connected Ölbrennersätζen on the heights C, e, and J for the ignition of the coal burners fed coal is available and also pulls the operability of the appropriate mills Consider _o How is the controller taking the appropriate steps? to put the selected mill and the corresponding coal burner replacement into operation _o This will be done in a specific sequence '. '·. · - ·. * ^'H' * - au · "guided However, if the selected mill and the burners set are not operated safely kamenο selects the furnace · - regulator 106 the next mill in sequence, and it begins to start, etc _ot until the requirements of the load" change taken into account isto

109846/0231

155 * 947 «Μ

Impulse generating circle

The combustion controller 106 consists of three T ed, your j serin. namely the pulse generating _{circuit (Figure 5) for} the oil burner * - set starting circuits (hall 6) and the mill starting circuit (Figure 7)

The pulse generation circuit or Figure 5 consists of a series and parallel arrangement of switches: which are connected to a power source and serve to excite a pulse generator. ls consists of parallel lines 112 and 114 _o Line 112 t - corrects the operation of the unit before any cooler has been put into operation, if a set of conditions is required to put a cover into operation _o Line 114 is operational when one ödere more is represents mills in operation or are, and another set of conditions applicable iat _o the line 112 contains a Serlenechaltung of switches IL6 _s 118 and 12O ₀ the switch 116 is a normally more open operated manually or by a relay Schalterü of the circuits Turbinengeneraters the 1st connected and closed Wix "d _c when the Gene" rat or S3 nchronislertr ^r is and the unit Therefore it is ready for an anochlups to an energy supply system. The switches 118 are normally closed, relals-operated switches which are connected to each of the mills kz and are therefore provided with the letters BD _f F _c H and X in the zoom dimensions; so d ao displayed iet _f which switch with which mill comparable = buna on Ie to each of the switch 118 remains gescnlosijen _r until it connected mill is in operation is made _t whereupon the suitable "switch by a feedback relay 272 (Figures 8 and 10 ) to interrupt the line 112 - it is opened so that no electrical current flows to the pulse generator 108 c The switch 120 is a normally open _c , relals-best & tlgtex 'switch _c that is connected to the oil stramungsiaeeaer 92 in the main oil supply line 5 ° (Figure h) connected iet _c

^108846/0231 BADOR ₁ G ₁ NAL

155t947

»12 -

Dl · arrangement let so? that an actuating relay (not shown) actuates switch 120 at a certain value 4 « _r oil flow. *. · ..: ^. · ■ ··. »·. - - closes to the burners 36, which becomes a Yarmepotential. because "· in addition to the heat potential of a connected oil burner set corresponds to the Värmepotential the least possible from a mill votes Kohleaenge used" the ignition supplied from the mill carbon · 'The purpose of this control element, it is ₀ to secure a heat balance in the combustion chamber 22 conservation When the source of combustion energy changes from oil to coal

Di · conduit 11 ** includes a serial scarf tune of switching input 122 and parallelgeochaltete switch 124. "The switch 122 ±» t a normally open _t relaie-confirmed switch "which is closed ^ if dl · Transmitter · load kz all working cooling at least 805 "the geeareten be of the mills triebekapasitüt amounts" D "r switch vlrd by a (not shown) relays operated _f which is controller by the burns 20 actuated when the mid" coal "bg &bt" of the mills in operation * 80% of your total capacity of which is determined by the Rückkopplungsuignale ρ * rswair.men of the speed "teaser 6k h, _v dler! örderglieö at each mills 52 is connected ₁₁ UIE switch a! in suitable Veieo with reference range vsrcoheri, <um

Which cooling ο jodex switches are “ngo closed let unG cle are rioramlervejae open relais-b“ activated switches dl “gesühloaean weiden _c vonri ihyc corresponding HUhIo is put into operation. On flieae Velae be ^ tlnnit the line

the operation of the Fauerungareglers JLOo suxohden, werAigratens one of Kohlamühlen kz has been taken in Setrieb ₀

The pulse generator circuit contains anaoerdora the switches 126 B _t 126 D _{connected in parallel;} . 126 F _p 126 H and 120 K ₁ . those connected in series with lines 112 and ll'j are «

109846/0231

155 * 5 (947

The * switches lft $ are normally open _{p confirmed} by relay 218 (Figure 9) · and switches connected to each of the enteprsehenden mills kZ? which are closed «when the corresponding grinder is ready for operation« with ". ' ready for operation · ^{1 means} that all necessary conditions for a safe MUhlenbetxleb are present ₀ which is indicated by actuation of elgneter feedback relays, which are dealt with in the following ₀ an additional point of view, which are taken into account with the term "ready for operation" muse _; consists in the fact that the mill 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

The pulse-Erzeugungskreie contains ausssrdem a series circuit with one another parallel-connected switch 128 C ₀ 128 I and 128J which are normally closed and are connected to each of the ent "speaking oil burner-SUtze and then opened ₆ when the corresponding set of burners is not put into operation ge" The switches 128 can be opened manually _ύ % o B ₀ if maintenance work has to be carried out on one of the corresponding burner sets or on several «They can also be opened automatically by a control relay» The arrangement is like this «<as the switches 128 then be automatically confirmed? if the number of operational oil burners 36 in each level C _v E and J is not sufficient " to sin the coal burners 3k of the connected coal burner set"

For this purpose, number circles _e such as * B _{0 shown} in FIG. 9 are used to indicate the actuation of a "

To prevent oil burner set "when more than one d * r four burners 36 of a proposition · inoperable 1st, as it turned out _p as ·· one set ₉ are operable in which three of four burners" a sufficiently · Knergi "EUR

BATH ORIGINAL

155 * 947

Ignition can produce all the coal burner 3k of the connected coal burner set _o The counting circuit consists of a series Paralleinschaltung normally open switch 130 'of which each of a d he "connected four burners that make up a particular set of" The numerals 130 are ait appropriate letters provided a _B b ₉ c and d _p to indicate which burner is connected to which switch. In the preferred exemplary embodiments, the switches 130 are end deflection holders ₉ which are actuated depending on the movement of each burner valve 100 and then opened when the valve is open _t so that it is displayed that the connected burner is in operation. If more than one valve 100 does not open, an electrical circuit is closed via the appropriate switch I30 to operate the relay I32, which then connects the faulty bracket 128 to the pulse generating circuit The figure 5 opens _o As shown, is there s Beiais 13? at the same time the actuator of switches 156 _P 158, 182 and 18U. These switches are used to generate feedback signals that indicate the operability of the connected burner set to the oil burner fuel constituency (Figure 6) and the MUhlen districts (Figure 7). A detailed explanation of the operation of these switches follows.

The pulse generator 108 which is driven by the Erzeugung8kreis Xmpuls <* can be formed as Sychronmotor a constant speed, drives a squatting 134 "" which _p is the switch I36 intermittently operated which then, in turn, the relay 138 energized intermittently. The motor runs at a speed of one revolution per minute and the switch I36 is closed for a period of two seconds at each revolution. In this way, the relay 138 is energized for two seconds every minute when the pulse generator 108 is energized * Di · Pulsation de «

BATH

- 13 -. / j

Peleie 13 "schliefet pleicbreitig the switch l4o and 142 * which the actuating elements of the oil burner set ~ Wählkreises (Figure 6) and the mill Vählkreises l46 (Figure 7) slnd _e

Oil burner replacement dials

The Ölbrennersata mode selector circuit of Figure 6 can transmit the actuators of the oil burner sets the pulses generated by the encoder 108 ,, the operation of this movement start laseeno the Kreie contains the pulsing switch is l4o ₀ operated the dee relay 138 '. The switch is connected to the three parallel ölbrenneraatz ° actuation = Relaie 154cρ \ 5 kB and 154 J "The arrangement is such ₀ that the closing of the switch l40 energizing only one of the relays 154 and corresponding commissioning of the connected • NEN oil burner set causes. In the described embodiment of the invention, it is advantageous to first start up the oil burner set C ₀ which ignites the neighboring coal burner sets B and D and then _{the oil burner set E 3} which ignites the coal burner sets B and F and finally the oil burner set J _t which is used to ignite the coal burner sets H and K "to put into operation ^ According to the circuit of FIG. 6, the closing of the pulsating switch IK) causes the relay 15 ** O _{9 to be} actuated, except when the oil burner set C is not in operation _s can be taken either because it has been switched off ρ or the mills of the coal burner sets B and D are both not ready for operation »If the relay 15 * t G cannot receive the signal, the relay If» ² * £ follows next and operates the burner 36 of the Ölbrennersatasee the plane e _£ Same "masses receives the relay 15 ^ £ Λ ^ η exciting signal so long _β

as it is not switched off itself or its connected mills 42 D and HZ F are not ready for operation "If neither the relay 154 C nor the relay 154 E is actuated by the impulse" then the relay 154 J receives the signal and takes the ones connected to it Mills 42 H and 42 K in operations The circuit shown in Figure 6 for performing this function is a series ~ parallel ~ circuit of switches 1569 158 _c I60 and

109846/0231

BATH ORIGINAL

■ - 16

I62ο For purposes is larger size clarity are equal · Switch "" provided it same COVERS numerals, but supplemented by appropriate letter ^ to indicate at which level _t which switch is connected _o the switch 156 are operated by the same burner counting circuit relay 132 and have the same meaning as the switches 128 in the pulse generation "circuit of FIG. 5 and are therefore closed" when the corresponding oil burner replacement is not switched off from the drive ". The. Switches 158 are also operated by relays 132; but have the opposite meaning to switches 156 _U Therefore, switches 158 are closed when switches 156 are open and vice versa «Closed switches I58 indicate that the corresponding oil generator has been switched off and therefore cannot be put into operation 160 are normally open and are operated by the mill ready relays 216 (FIGS. 8 and 10) and have the same meaning as the switches IIP in the d-air pulse generation circuit of FIG When the assigned mill H2 is ready for operation and the relay 216 is energized, the showers 162 are also actuated by the relay 216 but have the opposite meaning to the switches I60 and are therefore closed ^ when the switches I60 are open and vice versa, the closed switches I62 show on «that the assigned grinder is not ready for operation

shown; btatefc-t the oil burner substitute Vählki'eie (Figure 6) t.V9 diei partial circles l6k _T 3.66 and I68, <fie zuelnunrttr pari'.llel are gertchaitet and the impulse generated by the short-term closure of the'Ό one of the corresponding oil burner substitute Actuating relays 15 ² »C _f 15 ^ E and 15 '* J can transmit 0 The partial circuit 164 contains a series connection of switches 136 C with the parallel switches I60 B and I6O D, therefore an electric current flows to the relay 13k C. closed switch gate 1 ^ O ₁ , if the oil burner fuel C is not switched off and either the mill h2 B

10384670231

BATH ORIGINAL

- 17 or 42 D ready for operation ieto

The partial circuit 166 contains a similar circuit of switches 156 E ₀ 160 D and 160 F ₀ which allowed the relay 154 E to be energized by the pulse as long as the oil burner was not switched off and either one of the mills 42 D or 42 P is ready for operation, which supply coal to the coal burners 34 ₈ which are ignited by the burners 36 of set E _o The partial circle 166 also consists of a series-parallel arrangement of switches 158 G ₀ I62 B and I62 D ₀ the «internal power» JSF must & d achlieesen IBy the pitch circle ,, before the relay 154 £ pot are energized Therefore, the Heiais 154 e only excited by the _f by the Schliesaen of the switch pulse l4o generated ,, when the oil burner rate e is not turned off by the operation and one of Mills 42 E or 42 F is ready for operation but also possibly due to the fact that the oil burner C is not switched off from operation, which is indicated by closing switch 158 C or _{B or} that both mills 42 B and 42 D are not ready for operation, which is indicated by the closing of switches I62 B and 162 D.

The pitch circle 168 contains a similar array of switches 156 J ₀ 160 H and 160 K and the closing-esen of the former and furthermore one of the two allows the latter it _f, the relay 15 ^ 1 to erregeno this part circuit also includes -Still a series parallel Arrangement of switches 158 _s which are connected to the other oil burner sets C and £ together with the switches 1ό2 _β which are connected to the mills kz B ₈ 42 D and kZ F and this arrangement allows? as shown; the pulse only to the relay 15 ^ J _t to run if a condition exists ;, prevented the excitation of the other two relays 154 and 154 C E

Mills = Vählkrei

The mill Vählkreis the figure 7 selects "in · the cooling 42 Commissioning of _e if conditions _β enter the erfordernρ it

1Q384S / 0231

BATH

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1 155 * 947

the · · 1η further coal burner set is put into operation »The circle consists of« four parallel-connected partial circles 170 t 1729 174 and 176 _f, each of which the pulse generated by the closing of the switch 142 is one of the corresponding mill actuation relals 180 B, 180 D and I80 F, 18O H and 160 K transmitting can "the arrangement let so that _f triggered by the pulse" relay pulsed closure of switch 142, only one of the relay 180 is transferred _f üb its affiliated MUhIe 42 and the respective coal burner set in operation To take o In the embodiment of the invention described, the coal burner sets are put into operation in the sequence Ii-B *? "H = K. Therefore, the circuit is omr Figure 7 so that the Kelais 180 D is excited first and when the connected coal burner 0 cannot be operated safely _p either because the neighboring oil burner η 36 does not have sufficient ignition energy or the pressure is lost If 42 D is not ready for operation, the pulse is then • »received by the relay I80 B and etc. through the whole sequence

The Muhlen-VählkrelH of the figure. 7 Is a series ^ Parullel -Arrangement of switches 18 2 _p 184 _t 186 and 188 _o Again are the same for the purpose of description · F e are given the same reference numbers in addition to the appropriate letters? to - χ »igenc which burner set is connected to which switch _o

The switches 182 are normally open and are operated by dor. Burner-'2hhlkre ± 8-Rel * ie I32 (Figure 9) actuated and τίηύ g * tchloasen _c when the relay 132 is de-energized and on? .E ± ^ t ₀ that three out of four burners of an oil burner seat are in operation and that a sufficiently "SSündeaergie for igniting the coal iet available _c entströmt- 34 when the respective cooling taken into operation the burners

iome / 0231

155 * 947

The switches 184 are also actuated by the relays 132 but have an opposite sense to the switches 182, so that the former are closed when the latter are open and vice versa Sufficient ignition energy is generated to ignite the neighboring coal burners. The switches 186 are normally open and are operated by relays 216 (FIGS. 8 and 10) and have the same meaning as the switches 11b and 16o _b above. Closing the switch 186 therefore indicates that the assigned mill kz is ready for operation 188 _0, which are also operated by relay 216, have the opposite meaning to switches 186 and are therefore closed when the assigned MUhIe kz is not ready for operation

As shown in FIG. 7, each of the partial circles 17f> * 176 can direct the pulse generated by the closing of the switch I * t2 to one of the MUhI en-actuation β relays I80 _o The partial circle 170 to excite the relay 180 D includes a series connection of switches 186 D with the parallel lying switches 182 C and I82 Eo thus, a current flieset only by the circuit for Kelais 180 D after pulsed Close dos switch IKZ ₉ when at least one of the-two _t ülbrennerstttze C or e, the Kohlebrenneraats eind adjacent in the plane D ₀ into operation 1st and the mill is kz D ready _o the pitch circle 1? 2 to energize relay dee I80 B contains a SerienschaJtung of switches 182 C ₁ 186 B and 188 D ₀ on al tea wi 'ia · the corresponding relay is I80 B erregtp when the olbr "r.nereatK C IETP in operation which let indicated by <ias closing the switch 182 C and when the mill kz D not against _f the kz MUhIe B is ready for operation, which by the Schllessen S. switches 188 D and 186 B is displayed «, the partial circle 17 ** contains the switches I82 Ep 186 F and 188 D, which are in series with the switches ISk C and 188 D connected in parallel. The relay 130 F

109040/0231 _8AD original

1 155V9A7

is therefore energized according to the sole of the switch 142, when the oil burner unit C is not in operation or when it is in operation, no cooling unit 42 B or 42 D is ready for operation, provided that the oil burner unit E can provide sufficient ignition energy for the ignition Coal supply _p which is discharged by the burners 34 of one of the associated coal burner sets and is still provided? that the mill 42 F is ready for operation o -The partial claw 176 is arranged on actuation of the Müfclen actuation relay 18O H as well as the relay 180 K. The series »parallel arrangement of the various switches 182. 184 ₉ 186 and 188 is SOp that the relay 180 H is energized throws _P when β «Ana suck» arranged mill 42 H is ready for operation and the associated oil »burner set J has generated sufficient ignition energy C and 1β4 E closed line? when the oil burner cores C and E are both in operation | secondly via the line closed by switches 188 B _f 183-D and 184 B when the oil burner set C is in operation, but none of the mills 4? B or 42 E ready for operation and the oil burner set E is out of operation; thirdly, by the switches 188 _B1 188 D and 188 P ge "formed line when either or both oil burner sets C and E in operation eind _e but none of the mills 42 B, FEF D or kz F ready 1st ι and fourthly , through the line formed by switches 184 C "188 D and 188 F" when the oil burner set E is in operation but the mills kz D and kz T are not ready for operation and the üftrennereatx C is not in operation "Pieaer pitch circle 176 also contains the parallel switches 186 K and 188 H _s connected to the cooling relay 160 K «. This Weis "the relay gets · 180 K the excitation signal over one of the current paths described above, when d-arUberhinaue its associated mill kz K companies willing but the mill kz H is not ready _0"

108846/0231

155 * 947

Mills event circle.

Figure β did the soheciatic representation of a "Muhlon-Anlaraii;.riii."") A _c as it is used in the present invention, the circle shown is typical of the cone anorcmvmg, 41" because one of the powder mills is used hz in operation zxn nehss-m. ! In deapba β ore flat from ei führungsb play the invention "fvdrdtan five such circuits used, but that a unnötigr repetition vlrd avoided ₀ only one is Bosch rubbed, SSCR Mü2ilen ~ Anlaeskreie consists of a variety parallelgoecha) ■ -. Tet * r pitch circle 190 «202 _r , τοη each of which regulates different phases of the connected HUhIa kz. Her pitch circle 190 contains switches _p arranged in parallel which« signals are actuated »by the feedback, which are triggered by the different? to the measuring devices Depending <ier mill ang Kosponenten the circuits herstasmenu The measuring elements strier * n each of the different MUhIen-Bedlneuneenc that before the Zn "> the mill be satisfied etriebnah8M atUseen _a are for the purpose of a brief description only five such switches in dom pitch 190 shown o There are the switch 204 _c wcldisr * l; a HUckkopplun ^ ssignal from the Költluit-Einla * sventi..l 76 eMjp «t ₈ that indicated _c daes this opened ± * tj the switch 206 ad« r din feedback from ? ^ the Mühlctn AuslasaVentil 2 peels; the anxeigtp that this valve is geiiffnet:?. the switches 208 and ^ 1O _P, which "inzelgan * dtass the intake and exhaust valves 60 'and 62 of the Plirdsirgliedee opened tindj and the switch 282 _a of the of de »Relay 260 is actuated and indicates that the grinder is not switched off. With the exception of the signal for switch ZBz , these feedback signals can easily be received from end-of-line switches on the corresponding valves lten will be ₀ which are then closed "when the corresponding valve is open". In actual execution !, does this contain "? Partial circle some more sensual *

1 * - switches that indicate further states and the must be closed before the mill can be considered operational.These states or conditions include that the mill temperature is normalj an appropriate one

10ÖÖU / 0231

BAD ORiGlNAU

Lubricating oil »and cooling water supply exist; and more. If these conditions are satisfied ^ a circuit is closed by the sub-circuit 190 to the mill-ready relay 212 and thus the relay 212 is energized, which activates the switch 2l4 in the sub-circuit 192. The actuation of the mill-ready relay 212 indicates that all The conditions required for safe operation of the connected => closed mill 42 are satisfied ₀ If one of the conditions is not met _D the appropriate switch remains open and thus prevents the relay 212 from being excited ο

The sub-circuit 192 contains the mill-available relay 216, which is connected in series with the switches 214 and 218. As mentioned ofaon, the switch 214 is connected to the mill-ready relay 212 and is closed when energized. The switch 218 is normally closed and connected to the relay 272 (FIG lo) in the pitch circle 202, and _r is opened when the connected grinder is put into operation, "the relay 216 is then energized so by daa Schliessan of the pitch circle 192; when the Z ul & ssungs "conditions of the connected 3ind mill satisfies all provided _8; The mill is not already in operation. As shown in FIG. 10, the MU3ilo “availability relay 216 actuates various other switches to which reference was made above” ₀ These switches consist of switches I6O in switch 126 in the Irapula-Erzougungs-Kreia of FIG and 162 in the Ölbrennersatas selector circuit and switches 186 and 188 in the Mühlan selector circuit

The partial circle 194 of Figure 8 holds the motor drive of the mill timer 22O ₀ dor in series with the switches 217ρ 224 and 226 llegero The switch 217 is normally open and is actuated by the connected mill-available relay 216 ο Dor switch 224 is normally opened and is actuated by the relay 132 (Figure 9). In dom connected burner counting circuit which is then closed _c when a railcheode Z and energy is available to ignite the coal burners. The switch 226 is standardized! by

BATH ORIGINAL

155 * 947

da · connected MUhIen-Betatigunee relay which is set to 180 of the mill Wählkreiaes operated Daa Schllensen of the partial circuit 194 causes the resetting and starting dos timer 22O _{0 c} that it has a Perlode of at least 120 seconds has ο During this period "is any run the verechie _<0 3enen necessary for the mills' starting process steps; and xwar depending on the successive actuation of each of the timer contacts 228 "23O _P 232 and ZJk ₁ which can be actuated by Teasing or derglo" Daa closing the tent generator contacts 228 Ib sub-circles 196 energizes the parallel-connected electromagnet 244a, regulate, 244b, and 2Mc ZkUd ₉ which coal burner Eitslaaeventile 46 opening, the asu coal transfer the burners century in de "connected coal burner set

The sub-circle 198 contains the · Relal · 257. there · in series with the timer contact ·! » 230 and the switches 248 _f 250 and 252 switched lato The timer contact 230 let se set _e that it is at risk of 10 seconds after the contact 228 la sub-circles 196 gcechl & eoen «The switches 248 are noraalervei.se open £ xküt.vsechlag ~ 5chaXter _c the closed _r are wen "each of the connected valves 46 open aiehern i" t "the switches 250 and 252 are silt doe mill -Ready relay 212 and the burner -Zählkreif-Relaie 232." the "· two letxteren Sehalter la Teilkreia 198 an immediate · interruption de «<mills» & nf a & rvofgange _.e whom "Some state occurs _c would what & ftasuatend * eliminate the Bereitach the connected Muhi _s wa · by Aberrogung dee relay is indicated 212 or even if the ignite (srgle not Aehr available iet "what indicated by the / ^ excitation of the relay 132 virdo by closing the. pitch circle I98 is energized _v dae relay 257th the same time the Mühlenaiotor 254 and the solenoid 256 dea Heissl uft inlet valves »actuated by the Schliasserx of switches 258 and 260? Aaseerdeu the excitation causes the Relal · 257 · de Scltlleesen the switch 262 · 200 ₁ in the pitch circle of the motor 54 de Fördergllede · · _o energized, the motor 54 is

109846/0231

BATH

■ 1.

started after the relay 266 is actuated ₀ Dit> s shifted by the fact that the timer contact 32 and thereby the partial circle 200 is closed, namely .approximately 30 seconds the cooling motor 254 has been energized »Viede * ¹ : Ut the actuation of the motor 5 ^ of the conveyor link a dependent on the MUhI * v> Ready °> Relaie 212 and the Brennsr counting circuit relay 7 3- ^ j the sum of the gnomes of the switches 268 and 270 both remain energized

- Ue? Partial circle 202 contains: the relay 2? 2 ₈ because the mill is operating relay and by actuating the relay 266 on the excitation; is prepared and is finally excited by closing the timer contact 234, approximately 60 seconds after the timer contact 232 is closed o The energization of the relay 272 causes the opening of the normally closed switch 218 lsi pitch circle 19? "is deenergized whereby the mill ^ VarfügbRr-Relaia 2L6 and dl · 3CH% l-fr 162 _Φ 188 and 217 opened and the switches 126, 160 and 166 closed werdenύ

The excitation of the mthle-in-operation relay 2? 2 also causes the opening of the contact · 2? £ iu pitch circle 203 ° The pitch circle 203 contains the relay 28o «as in series. Since the switch £ 76 and de * B Zoitgeber contact 278 is arranged. The relay 280 i «t the mill switch-off R ^ lÄi»; and opens the switch 282 i »pitch circle 190 isMer when the mill-in operation ReJ * is 2? i. · is not excited. The tent donor "Xontakt 278 is set to _t he Αελλ about 5 seconds after schliertet deai contact 234. Thus, if the mill starting operation is not completely performed from any ^one reason is not the Releie 2? 2 _f special άζτη. the relay 28 /) excites what the opening of the Schfltori 282 in the Tetlkroie 190 and thereby the distraction of the Mtihle-Bex 212 uit <? then the MUhIe-V «rfUgbar-Relais 216»

Operation of the control stone

If you start the steam generator from the cold Zxx ^ stand, wire and daea all of the powder vents 42 are

109046/0231

ftlgbar and ready slnd ₀ The steam generator au · β then gradually initially on ( "be heated« · ο as "· dl · wide ·" nen pressurized parts of the unit are not subjected to undue thermal stresses _o The heating is done by Supply of vase from the pipes 12 and of oil from any of the oil burner sets C, E or Je. The heat generation in the combustion chamber 22 is gradually increased by increasing the oil supply through the control valve 90 in the main oil line 50 If the heating-up temperature is increased, additional oil burner sets are put into operation by an independent support that did not form part of the invention

After completion of the heating process, the power plant is ready to be connected to an energy supply system. This happens when the output voltage of the electric generator is in phase with that of the energy supply system, before the steam power plant operates under normal conditions and at this point there is firing -Controller 106 of the present invention effective to put the various coal burner sets B ₀ D ₀ P ₉ H and K into operation »

Under the above Bedindungen ₀ nämlioh that all the ölbrennereKtze C, E and J are in operation and none of the Vulvermühlen been taken kZ until now in operation 1st but fell · ready ", the electrical switch of the various sub Kreisee which the combustion controller 106 Bildanin the following state * The actuating button 110 (FIG. 5) of the pulse generation circuit is closed and the combustion controller 106 is activated as a result. In the mill (FIG. 8) to which each mill 42 is connected, all switches in the sub-circuit 190 are closed and the mill-ready relay 212 is energized "since all conditions for safe operation of the mills are present" Since the connected mill kZ is not in operation _tf , the MUhIe-in-operation relay 272 is de-energized and therefore the switch connected to it

1008 * 6/0231 _BAD

155 * 947

i «Yexikreie 192 closed«. From ** ra · * «lad« Si * Stsli »lt« r lit b to K in a # r line Ixü des l

sohlosssn, since the corresponding HUhi * -lu-i) »- t? ieli ~ R <» ifcic. 2? 2 de-energizes βΐηα and the switch iü4 B bi »E Iu de * line the xapuie-Erseutsungskrexees aim open» ami. «X ¥« ^ t «» i Berelt-Heiais 2x2 and aberregtea Hühie-xn ~ bet; rl «b« 4t «lai» '£'} k aind. dia switch 211 and 2xä la Tailkraia 192 daa mill-occasion-kraiaaa gaaohloaaan ₀ eo daa8 daa mill-Varfugbar ~ Relaie 2I6 % τ- r * «t is and then Schaitar 217 is Tailkraia 19h achliaaato Veit he« causes the excitement daa corresponding MUble »Available ~ Relaie 2.16 daa Closing the switch 126 B bla κ in the impulse ~ Eraeugungakreia _p daa Closing the Schaitar I60 B bia K and opening the switch 162 B to K in daa oil burner = dial (Figure 6) as well o Since all · ölbrennereätae C ₀ B and J in operation aind _p are the torch "Zählkreie ~ Relaie 132 energized daa Schlieaaen represent switch 186 B bia K and daa the Schaitar open 188 B bia K in de" mill VKhlkrela (Figure 7) and therefore the Shaitar 128 C ₉ 128 E and 128 J in the Iapula-Sraeugungekrela closed; la Ölbrenneraata «Vghlkrela (Figure 6) the switch I56 Cp I56 E and 156 J closed and the switch 158 C ₉ 158 E and 158 J open; and la Mühlen-Wahlkr "ia (Figure 7) the Schaitar 182 C ₉ 182 E and 182 J closed and the switches 184 C ₉ 184 E and 184 J open"

If the output voltage of the electrical generator 16 has been brought into phase with that of the energy supply system, the switch 116 in the line 112 is the lapuls generation "circuit (FIG. 5). If at this point in time the load on the unit is so small" the operation of the oil burner 36 in the oil burner boxes C ₉ E and J is sufficient? the corresponding output on the veiae is raised under the control of the pre-combustion controller 20 and the combustion controller 106 remains ineffective. However, if the load increases, the oil supply will through

109846/0231

1 155 * 947

the line 50 increased for a long time by actuation of the oil disturbance regulator 90 under the control of the · combustion · glider · 20 · o; The heat value of the oil supplied to the burners corresponds to the sum of the heat values of the coal that is supplied by a powder mill 42 at its minimum output in addition to the heat value of the oil burners used for ignition before the switch 120 actuated by the flow meter 92 schllesst and via the line 112 is a circuit for actuating the motor of the pulse "generator is made 103 _o his excitement Naoh _s is the Xmpuli timer 108 immediately returned to its starting position and immediately begins to exert ssine function, which consists in; to close the switch I36 intermittently for a period of two seconds during a period of 60 seconds, causing a pulsating closing of the switches l4o and l42 in the oil burner set selection circuit and the mill selection circuit o The operation of the pulse generator · 108 is like this? that this continues _r its periodic pulses send _e until the condition has been eliminated, the excitation of the pulse caused _«e This meant in addition to the elimination of the availability of all Pulvermtthlen k2 or the oil burner Titze _fi that the pulse generator 108, the switching he l4o and so ikz long pulsed closes wirdf taken up in a condition ^ where no mill is in operation "a mill in operation whereby the circuit would be interrupted via the line 112. in the pulse« £ rzougung8kreis or so long _s bul a state in which at least have one of the mills in operation _{c is} the mean value of the mill load of all mills in operation is below 80 pounds of their total capacity, which is determined by the combustion controller 20 _c whereby the circuit through the line XIk is interruptedo

The pulsed bottom closing of the switch 140 by the pulse generator 108 is transmitted in Figure 6 to the oil burner set ^ actuation ^ Relals 154 C via the partial circle 164 ^ because under the conditions set out above this is the only circle _c that is caused by the closing of switches 156 and 160 and the opening of the switches 156 and 162 is closed «The actuation of the relay 154 C would normally-

109846/0231 ₈ AD original

165 * 947

as the operation start dee ölbrenneraatzes C trigger ;, but due to the fact that the _c-ear Ölbrennersatζ is already in operation, for the reason _c because he remained after the end of Anheiz = process in operation ,, has the excitation de «relay 154 C No effect _o As a result of the pulsed closure of switch l4ö, the simultaneous closure of switch 142 causes the "transmission of the signal through the partial circle 170 (Figure 7) to operate the mill" relay 130 D "Since all switches 182 and 186 in the mills are closed are closed at this time and switches 184 and 188 are open _f the partial circle 170 is the only one through which a current can flow and therefore the Beiais 180 D is the only mill operation relay that can be excited _o When the mill activation relay 18C D is actuated, the mill start switch 226 in pitch circle 194 of the mill starter circuit (Figure 8) is pulsed? dttx- is connected to the mill 42 D ₀ which supplies coal to the coal burners 34 in the set on level D o By closing ο switch 226, the partial circle ί ° Λ is closed :; since the switches 217 and previously already through the excitation of the mill available relay 22.6 and the de-excitation of the oil burner set counting circuit relay 132 have been closed ^ so that the mill timer 220 is actuated ₀ which remains closed after its actuation signal and the successive closing of its connected Contacts 228 to 234 cause »

The mills timer is first contact 228 in the pitch circle 196 ten hours after & he shot it drives the timer by denBetrieb 220 closed se DAEs the Ma & natspulen operated 244 and jed 's of the intake valves are opened 246 of the burner in the plane D, "ihnn The valves 46 reach their position, vir <ä the final failure switch S48 in pitch circle 198 geachlosffan, which is connected to the corresponding burner. The switch tar 2 | ξΟ νηά 2 '$ 2 ± m I98 remain that way closed long? vi.9 the Müftl ^ i-Bas-eit relay 212 _c which is connected to the mill 42 D. It is fine, remains energized and the burner counting circuit relay 132 _s di © with iion oil burner saddles

155Ϊ947

C or E are connected _p-energized bieibeno This switch in the pitch circle 198 and the equivalent switch 268 and 270 are used in the pitch circle 200 to then _p the mills "start-to END® η ρ if © int" or more required for a safe mill operating conditions disappear "After the mill timer 220 has been energized" The timer contact 230 closes * t & hn seconds after contact 228 and when all burners "inlet valves are open;" 257 closed its excitation at the same time the actuation of the mill motor starter switch 258 and _{the hot air magnet switch 260 causes P to} start the motor 254 and to excite the hot air magnet switch 2 6 _B so that the hot air connected to the mill 42 D ^ Valve 68 open v? Lrd ₀ The excitation of the relay 257 also causes the safety of the motore chal tor β 252 of the conveyor link in the part "kr« is 20Oo This pitch circle is (grei s β ig seconds na eh the operation of relay 257 ge by the timer contact 232 = closed ^ da ee it has been found ₀ that thirty sufficient seconds !, to the mill is sufficient for their operation, air 'tamng9 The Schllessen suzuführeno of the pitch circle 200 causes the excitation of the conveyor motor start relay 266 _g that the engine start · = Sch & lt®r 267 echllesstp whereby the conveyor motor 54 is operated and the powder mill 42 D feeds broken coal The relay 266 is also used for closing * « n of switch 274 in pitch circle 202 so that the mill relay can be excited sixty seconds after actuation of the conveyor motor 5 by closing the timer contact 234 ₀ The excitation of the relay 272 causes the opening of the switch 218 in the partial circle 192 de »Mühlen-Anlasekreiseso whereby the mill -available relay 216 de-energizes and the switch 217 iia partial circle 194t, the switch 126 D in the pulse generation circuit (Figure 5) _c the switches 160 D in ÖlbrennerBata "¥ fihlkreis (Figure 6) and the switch 186 D in the mill constituency (Figure 7) open - and the switch 162 ΰ in the Öibrennereat""constituency and the switch 188 D in the mill constituency are closed ₀ By the excitation of the Relay 272 is also switch 118 D in line 112

109846/0731

BATH

155 * 947

- 3O -

of the pulse »generation circuits open and the switch 124 D in the line 11 * »closed, so that the pulse generator 108 de-energized -. and all further control of the mills from line 112 to line 114 of the circle (Figure 5) is transmitted o

If for any reason the mill 42 D cannot be put into operation _c the mill Xn operation relay 272 is de-energized and five seconds later after the timer contact 278 is closed, the mill switch-off relay 280 would be energized and the switch 282 in circle 190 open _D whereby the mill-ready-solenoid 212 and the mill-availability relay 216 are de-energized _o The de-energization of the mill-available relay 216 would open the switch 120 D in the iapuls = * generation _{circle s} the opening -At the switch 160 D in the oil burner set ^ WHhlkreis and the opening of the switch 186 D in the mill selection circuit and the closing of the switch 162 D in the oil burner set selection circuit and 188 O in the MÜhlen selection circuit. If the mill connected to the mill 42 D were not energized as 272, the pulse generator 108 would remain energized, since the error holders in the line 112 remained closed a further closing of the switch again pulsed Since the switch is open 186 D dea mills ^ Wählkrels now and the switches _c 198 D closed slnd the pulse sum mill Wuhl-Relaie l8o B transmission, which triggers 42 B the starting process of toil "» ^, which supplies coal to the burners of the cooling burner set B ₀ by means of the mill starting circuit (Figure 8) which is connected to the mill 42 B in the same way ₉ as was previously described for starting the mill 42 D

GlaJLchermaasen würda.j the mill 42 B is not ready for operation is ρ her mill »n-Afc. <3chali; ~ Ralais 280 one hundred fifteen seconds after the beginning of the second impulse are excited »by d *» as

109846/0231 bad ori _Qinal

1 155 * 947

open the switch 126 B in the impulse 1 generating decrels 18d B in the oil burner substitute electoral circle and 186 D in the mill electoral circle and to effect the "closing of the switches 162 B in the oil burner electoral electoral area and 188 B in the mill electoral area" Pa until now no mill has been put into operation ", the pulse generator 108 remains energized and still another pulse is generated * to the switch 142 (figures 5 and 7) au 3chllessen _Q closing the switch l42 now generates a pulse ^ to be the grinders -Wfchl = relay 180 P and then to the mills selector relays 180 H and 180 K Successively transmitted, namely in the case ₁ that the following mill is not ready for operation

Assuming that the mill 42 0 has been put into operation, pulverized coal is fed to the burners 34 of the coal burner set 0 via the associated line 44. In the combustion chamber, the coal is ignited by the burners 36 of the oil burner sets C and E and so the First coal burner set put into operation _o It is noted that a single oil burner set was sufficient to ignite the coal flowing out of a coal burner set 34. Due to the spatial arrangement of the burners 32, the coal ebvanner set D is located between the oil burner sets C and E. and can therefore be triggered by either of these two sentences _β

When the mill 4? D is put into operation ο the switch 118 B in the line 112 of the Impula production circuit is opened by the -Mühl®-In-Operation = .Relay 272, which interrupts the circuit and the pulse generator 108 is deactivated line 114 is closed and the operation en © Ijnpulsgefcere I08 has been After the mill and its Registered Assigned set of coal burners taken from the line 112 transmitted to the line 114 "once in Betrisb _t its operation remains subject to the control of dos Verbrennunge-Feglere 2D _r of the Coal supply to the mill and then depending on the burners

04 6/0231 'BAD ORIGINAL

1 sl. 155 * 947

The required output of the unit regulates »The combustion controller closes the main supply oil valves 96 in the three oil burner units at this point in time and thereby cuts off the oil supply through these valves Tributary flow recirculator 9 ^ c so that oil continued to flow to the oil burners 36 at a minimum pressure. This oil flow is sufficient to maintain a flame on the burners and to generate sufficient ignition energy for a neighboring group of coal burners "All the next" Chile "t of the combustion" regulator 20 all auxiliary flow "" valves 9k off "the oil burner set C _{0 assigned} to the coal burners 3% de sats D" This interruption of the oil supply is to be found Burners 36 occur through a partial circle of the combustion controller 20, which does not form part of the present invention and is therefore not described _{or the like}

At this point in time, the operation of the mill kZ D is controlled by the combustion controller 20 "As the load on the unit increases, the speed of the motor increases 5% of the conveyor 52 to which the mill% 2 D belongs," o da ·· the mill. • ine increased amount of coal supplied "If the load on the mill 80 it reached its capacity" as determined by the speedometer 6k "is the switch 122 in the line 114 of the pulse-Krzeuguneekreises closed and the pulse generator 108 reset · Anschlieesend it begins its operation and energizes the relay I38 and simultaneously actuates the switches 1 * 0 and 1 * 2 of the Ölbrennersats-Vählkrels and the Mühlen-Yähl <~ circuit with a pulse in 60 seconds »

By closing the switch IhO in the oil burner set valve circuit (FIG. 6), a current flows to relay 15 * C, since switches 160 B and 160 C are closed, the mill is ready for operation, while the oil burner set valve is not switched off '1st De. However, the oil br * eanersats C is already in operation, the excitation of the relay 15 * C has no effect. In contrast, in the mill constituency (Figure 7) by closing switch 1 * 2 of the

10ÖÖ467Ö231

155 * 947

Pitch 172 to energize the relay closed 180 B "because the switch is closed 182 C for the reason" well of the oil burner sat ζ provides sufficient to ignite the associated coal burner power and the switch is 188 D closed "because the mill k2 D Now in Is in operation and therefore cannot be put into operation again o The switch 188 B was closed when the relay; 217 of the mill kz D was de-energized and the switch 186 B is closed because the relay 217 of the mill k2 B is energized, namely due to the fact that his grinder actuation relay 180 B is energized and switch 218, which indicates that the grinder is not in operation, is closed Switch 226 in pitch circle 1 - 4 of the MUhlen selector circuit (Figure 8) * the mill kZ B pulsed * so that the sensor 220 is excited and the starting process for the mill kZ B is triggered.Bas starting this mill then runs on the gl calibrated way, as it was previously described for the mill 42 D ₀ After the start-up process, the mill-in-operation relay 172 is energized and opens the switch 218 in the pitch circle 192 to de-energize the mill-available relay 216 and the switch 118 B in the line 112 of the pulse ^ Erzeugungakrelaes and Sleeping umn switch 124b in dw line Hk ₀ Venn da · mill Yerfü _c bar-Kelais 2Io deenergized wirdρ be the damage 126 B in the pulse generating circuit, Switch 160 B in the Ölbrenneraatz-Vählkrei "and switch 186 D in the Mühlen-Vählkrei closed and switches 162 B in the Ölfhrenneraatz-Vählkrei · and 188 B in the Mtlhlen-Vählkrei» open, whereby the constituencies for the next «, The pulse generated by the pulse generator 108 must be prepared.

When the burner Jk of the coal burner set B put into ^ the switch 122 de in the line 112 * pulse generating circuit opens _c there are now two mills in operation and its average load is less al · required for a closure of the switch 8o £ is «The opening of the switch 222 interrupts the circuit through the line ilk _p because the pulse generator 108 is de-excited

1098 ^ 6/0231

BATH

- 3k - ■

Xn dot WmIl ₉ that the mill kZ B is not ready for operation, either because the necessary conditions are not met or because some part is not working properly? naehde * represents Schaltalllauf began in da * pitch _e but extends daa MUhIe-Available-Relaie 216 and achlieaat dia switch l6o B and 186 B and slide switch 162 B and 188 B in-.entsprechenden constituencies "When daa aratara happens" achlieast aioh one or more "the switch -20% -210 in the partial circle 190 is not and aina excitation da · mill-ready relay 212 is prevented" If daa latstara paasiert, daa Mühle-Abachalt-Relaia 280 is excited and opens the switch 282 in the pitch circle 190 and the Mühle-Berelt relay 212 is de-excited. Sin · oil rather process would ea require data another 8ats tob is genoMsen operating oil burners 36 before another Satat coal burners 34 could be genoaaien in operation, and awar because d% r Sats of Ölbrennsrn at the level of 0 for the burners Jk the coal burners on levels B and D can produce the necessary ignition * energi "Before the coal burners dea Satssee W can be put into operation" badly the oil burners 36 of Satsei 1 are working, since the Brennar dea Sataes F will be loaded "know"

The oil burner of Sataes K dedvroh gei in Batrieb is daaa Sebalter XkQ closed we "t" ed the pulse the Ölbrennersata ^ nf »hr-Helaie * 5 * B ettgelel ^ tet is" f to daa starting dmr dleaem Sata amgeerdiiete "SflmdbreiUBor effect ko am 'j and run the oil burner "fuel" * ts ". Hmvn the 8 * ~ I burner daa Satces C are working · the lfctifcl * * 2J> i "Bairie" let and the mill h2 B can not be started "soaehight ^; . {the · because the partial circle 166 la de «öXbre **» are% t * -lfahlkreis «te» Impula jetat Tom Sehalter 1 · Λ the fcelAif "* i $ k M over, the switches 162 B _f 162 D , 16o F and 156 E sulelte> « _f the 4 * * * * all geaehlossan alnd. The Pehalter 16t B and * <* * eimo agreed because the ordnaten them MUhla ^ T <Npf« ie »ar * lf ^ ais 216 The visual altar XtQ F let geecttia «aen _t because its ordered relay 216 * m * t iat and the visual altar S5 # F

109840/0231

OFtlGi _NAL

: 1

155 ^ 347

- 35 -

is closed, viii daa with lh * ν connected to the burner counting circuit relay 1 $ Z is de-excited and thereby indicates that the oil burners of level F are not switched off The switch is closed and the resulting pulse is then passed to relay 154 to trigger the start-up process of the oil burner 36 of the Satsee S. The start-up of the oil burner set is effected by first actuating the inlet valve 98 (FIG. 4) of the set and the valves 102 of the pilot burners are opened and that then the spark plug 104 is energized to ignite the pilot burners, which in turn ignite the oil flowing out of the burners 36 182 E closed and switches 184 F. opened «For the commissioning of an oil burner set,» approximately 50 seconds are necessary » If the next pulse is generated 60 seconds after the previous one, the pitch circle 1?% <t «n pulse from switch 142 via switches 188 B, 188 D, 18a K and 186 F to the Mühlen-Anless relay 180 F" When relay 180 F is energized and the mill starter controller of mill 4 * F is actuated, the start-up process of the mill then proceeds in the same way as was previously described with reference to mill 42 D.

Venn the mills 42 Bund 42 P and those fed by them Coal burners 34 of the 8KtKe B and D are in operation, and the load the unit continues to rise, so another Sat «has to be put into operation by coal burners 34 the mill 42 F is taken on the same titmouse as it has been described above, namely by the fact that the first pulse returned by the pulse generator 108 is sent to the oil burner replacement system 154 E and the next impulse then the MUhIen starter relay 180F is supplied · # ir ^ eiifcrete 164 the lepulse cannot Forward longer because di * ItUaIeH 42 B and 42 D are in operation and the switches I60 · un < I60 D are therefore open. Likewise the pitch circle 168 cannot forward the iepulse,

BADORiGiNAL

1 155 ^ 947

since the oil burner set ε is not switched off and the mill 42 F is ready for operation and therefore the switches 158 E and 16? F are open _a After the F switch 104 is closed, the current can therefore only flow via switches 162 B _t 162 D _p 160 F and I56 £ to relay 15 ** E and thereby "start the oil burner 36 of set E" When the pulse generator I08 generates the next pulse, it is sent from switch 1 * 12 to the Mühleri-Xählkreia via the partial circle 174, consisting of the Sohalter 188 B ₉ 188 D _P 182 E and 186 F, which are now all closed the relay 180 F supplied to the excitation, in the same way as described above and starting d he mill 42 F proceeds accordingly

When the coal burner sets B _p D and F are in operation and due to a further increase in the load it is necessary to start up another coal burner set 1stρ, the oil burners 36 of set J are started up and then the mills 42 H or 42 K are put into operation _o According to the sequence described the mill 42 H first put into operation if it is not ready for operation _c the mill 42 K starts operation The pulse passes through the switches 162 B ₈ 162 D "I62 F ₉ 160 H _p I60 K and I56 J ₀ which are all closed" because the mills 42 B _t 42 D and 42 F are now in operation and therefore cannot cope with an additional load ₀ so that their respective relays 216 are de-energized and the switches 162 _O connected to them _c are therefore closed Since each of the mills 42 H and 42 K is ready for operation _f their respective relays 216 are energized _c so that the switches I60 connected to them are closed o Since the oil burner set J is not in operation off is _s to him angesphlossene burner ZKhlkreie relay is de-energized and the switch 132 I56 J = closed After

109846/0231

BATH ORIGINAL

• 1 155 * 947

the oil burners 36 of set J are in operation ₉ the next pulse generated by the pulse generator 108 is via the switches 188 B _e 188 Dp 188 F ₀ 182 J and 186 H de · pitch circle 176 and the mill constituency ·· the * mills ~ Anla »* - Relay · 180 H aided, which reads the start of the mill 42 H«.

When the mill 42 H is available for operation "no current flows to the Beiais 180 Kp because the switch 188 H is then open lato If the mill 42 H were not ready for operation, the switch 186 H would be open" which prevents the relay 180 H from being energized and switch 188 H, which is actuated by this relay, has the opposite sense as switch 186 H _e is closed and causes relay I8o to be energized, "which triggers the start-up of mill 42 K"

After the mill 42 H has been put into operation, the switch 186 H is activated by actuating the relay 2? 2 in the pitch circle 20? opened, which in turn opens the switch 218 in the partial circle 192 and the relay 216 is de-energized. Opening the switch 186 Ii causes the switch 188 H ₀ to close so that the relay 180 K is generated by the tom pulse generator 108 _{upon receipt of the next pulse p c is being} prepared «If a further increase in load requires the commissioning of yet another coal burner replacement; Therefore, the excitation of the pulse generator · 108 causes the instantaneous generation of a pulse * which is received by the relay · 180X; in order to «start up the mill 42 K and put the coal burners 34 of set K into operation»

So Ss is an electromechanical ·· control system * for automatic Regulation of the start-up of burners of a coal-fired "Much" burner steam generator has been described * which is characterized by a simple construction and effective and flexible operation iet «With the present invention, the multitude of Powder mills »which is the operation of the throat burner firing · - determine the system of a steam generator of large capacity »so controlled be that only the set of coal burners in operation

"BADOBSQiNAL

155 * 947

who is also an · "safe operation is genoaaen _£ iat capable. The system also has devices that secure? because an increase in the load is also taken into account if the selected burner set cannot be put into operation _f by _c that another set is automatically selected and put into operation. Bowlers to control the burner operation · after their start-up is used _c can be achieved through them a total automation of the burner system of steam generators trosatr capacity »

Can be understood £ · 8lch _(that · the details described to illustrate the invention ^ materials and arrangements of parts of professionals amended _p without departing from the scope of the invention "

Enclosure 5 sheets of billing with
* "lO figures.
14 claims

OR | Q, _NAL

Claims (1)

155Ϊ9Α7 Claims ) Blektromeciianlsche Fegelanlage for the combustion chamber of an automated steam generator with coal burners fed by powder mills _c which are ignited by further, Z ₀ B _{0 oil burners c} with the analog regulator a power output corresponding to the load fluctuations by controlling the operation of the mills and the Burners secure and the automatically determined coal: -mills and burners depending on the load fluctuations and certain operating conditions in operation “characterized; that a firing cone (106) via a pulse-controlled oil burner selection circuit (Figure 6) with a large number of oil burner actuation elements (154 C ₉ 15k E _c 15h J) and via a pulse-controlled mill starting circuit ( Figure 7) with a large number of coal mills actuation gliders (I80 D ₉ I80 B _οο .ο) is
electrically connected, and that the pulse-controlled circuits (Figure 6 _t 7) synchronously with each other by a pulse-Erzeugungekreis (108 p 136 _t 13 &) _s are energized via a series-parallel ^ circuit (Figure 5) a plurality of switches (ll6 " . <. ».. _p 122 _{c 0} ... °.) _C whose open and / or closed positions indicate the load fluctuations and at least some of the operating conditions _{f is connected} to a power source o ) £ lektromechanische plant according to claim I ₉ characterized _£ that the ^ mpulsgesteuerte oil burner = WUhlkreis (Figure 6) of a plurality of Ülbrenner-BetUtigungekreisen (164 _Φ 166 _P I68) is ₀ each having an in series with its respective oil burner Betätigungsglled (154 C _f 154 Ep 15 ^ J) gesclialtetenp normally open? switches (1560/156 K, 156 J j) that depend on the operating conditions of the oil burner 109 * 46/0231., «, 155 * 947 - ko - ■ 5o) Electromechanical · control system according to claim 2 _S characterized ge · = · denotes _t, the · the inpulsgeeteuerte oil burner Wiihlkreis (Figure 6) further 164 »166 in all oil burner Betätigungskreieen (168) normally geüffnetep dependent on the operating conditions of the mill Switch (l6o) and in all oil burner actuation circuits (166 _P 168) except for one normally closed switch (I62), which depends on the operating conditions of the mill, contains _c and that these switches (l60ρ I62), through their interaction, ensure that the oil burner actuators are energized in the best possible sequence ο ko) Electromechanical · control system according to claim I ₅ 2, or 3 _C characterized in _t that the isipulsgesteuerte mill Anlaeskrels (Figure 7) from a plurality of mill Actuate the ~ gungskrelsen (l? 0, 172 _p 17 ^ »176), of each having an old in series eeinea corresponding mill Betätlgungs »membered (I8O D _f I8O B _c 000) connected _c usually ge-Hffneten, dependent on the operating conditions of the mill switch (186 D, 186 B, 186 F _C 186 H ₆₁₈₆ K) contain 5 x) Electromechanical · control system according to any of claims 1 - k _t wherein _f that the pulse-controlled mill starting circuit (Figure 7) further in all MUhIen "Be = tätigungskrelsen (17Op '') at least one normally-open" on the operating conditions of the. oil burner from "hangigen switch (182) and ( '17 * tp I72 176) in all mills Betätigungskrelsen up to a _P normally closed _f of the operating conditions of the mill-dependent switches" (188) and that the switch (182' 188) secured by their interaction, which * are the Mühlcn actuators (I80) by the oil burner ~ actuators (15 ¹ O · excite "■" 155H9A7 6o) Electromechanical © control system according to any one of claims 1 - 5p d-a characterized by; the "the series," parallel circuit (Figure 5) "in a first parallel line (.114) mineral normally open switch (122) (. the function of Belaetungsänderungen this line (11 * 0 at a certain Belastungawert for the pulse (I08) prepared ο Characterized 7o) Elektromechanlache control system according to any of Anspruch® 1 = 6 _C characterized _s that the series-parallel circuit (Figure 3) In a second parallel line (112) a normally open switch (ll6) comprises ^ the dependent one of the synchronization between Generator (Ho) and an energy supply system that provides this second line (112) for the pulse generator before a mill (42) is put into operation _{or the like} S ₀ ) electromechanical control system according to claim 6 and 7p characterized in _{that a} that the two lines (112, 114) are connected in parallel; the first (114) connected in series is a group of normally open switches connected in parallel with each other and closes when the corresponding mills are started up, and the second line (112) connected in series is a group of normally closed? with one another in series ~ switching toters when the corresponding mills are put into operation contain switches that open. 9o) Blektromeohanische control system according to claim 6 and 7 or S _0, characterized in that the series-parallel circuit (Figure 5) furthermore contains groups of switches (126 _e I28) connected in parallel and that the groups in series with the lines (XVd ₀ , Il4) and the pulse generator (108) llegeno 109846/0231 _BATH ΙΟ ·) Electromechanical · control system according to any one of claims · 2 - 9 »characterized _c d-ass at least · • inic · the Ü * lbr« nner-B * activation circuit · (166, IfS ) contain switches (158), dl · ensure that after the failure of an oil burner actuating element that has been selected for excitation, a pulsed signal is fed to a further oil burner actuating element. 11ο) Electromechanical * control system according to any one of claims k - 10, characterized in that at least some · of the _{grinder actuation claws (17? P} 17 * »ν 176) contain switches (188)? the secure _c ·· since the failure of a beet is "ten coal burner a pulsed signal of the operation · - member of a mill is fed, which feeds another coal burner · 12o) Electromechanical system according to any one of claims 1-11, characterized by sensing circuits with colais (13 ^ »212 _c 216» 272), which switch depends on the operability of each oil burner _for the operational readiness of each mill »Activate the operating status of the oil burners and the mills. 13 ·) Klectromechanical bowling system according to any one of the preceding claims · »characterized in that the pulse generator is a switch contact (136) driven by a motor» which periodically excites a relay (138) «which via its« contact · (ΐ * »0, l42) the oil burner electoral circuit (ikk) and the Mühlen-Anlaaekrai · (l * »6) excited. l4o) Electromechanical · control system according to any of claims · 1 - 13 _C, characterized in that for each MUhI · (42) • in MUhlen-Anlaeekrels (Figure 8) there is provided "d" r on a multitude of parallel pitch circles. (190 - 202) consists of »the sequence of the start-up program * β of the corresponding mill depending on a mill-ready 1098U / Ö231 8ADORfGiNAL 155-7947 Control relay (212) «indicates; whether the coolness all met the necessary conditions BAD OBIG'NAL 109846/0231 Blank page