DD208509A1 - METHOD AND ARRANGEMENT FOR ACCESSING A CARBON STEAM GENERATOR - Google Patents

Abstract

The invention relates to a method and an arrangement for starting up a coal dust-fired steam generator, wherein a suitable secondary energy carrier for heating up the combustion chamber and a process engineering solution is to be developed. This is achieved in that, according to the invention, the pulverized coal / air mixture of a pulverized coal mill of an operating steam generator is completely or partially controllable and conveys the steam generator to be approached into the pulverized coal main, auxiliary and / or auxiliary burner system and / or a pulverized coal mill after reaching the combustion chamber temperature required for ignition, via the pulverized coal main burner plant of the pulverized coal air mixture, the coal dust duct of a pulverized coal mill of the steam generator in operation is connected to the pulverized coal duct of a pulverized coal mill of the steam generator to be approached via a controllable connecting duct.

Description

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Title of the invention. -

Method and arrangement for starting up a pulverized steam boiler

• Field of application of the invention

The invention "relates to a method and an arrangement for starting a coal dust-fired steamer

Characteristic of the known technical solutions

The start of a coal dust-fired steamer Eger is done so that. the combustion chamber of the steam generator via a coal dust-fired pilot burner system, via a gas or oil-fired pilot burner system, rust-assisted pilot burner system and / or via residual heat supply (hot air, flue gases, electric energy) to the ignition of the pulverized coal Warmed up to the required temperature, then the sole dust firing system, put into operation and, under stable combustion, the ignition aids are set down.

The known measures and solutions, however, have a number of disadvantages, so that a "realization" has not been done so far

'- Powdered coal-fired pilot burner systems (DR-PS 755 552, 743 o34, 746 929, 926 024, 923 213, DB-OS 2 806 363, DD-PS 120 533, DD-PS.). IP W 23 C / 222 330'and DD-PS. "♦ .. · - WP F .23 C / 225 188) special expenses for the preparation, drying and ignition of coal dust;

- Gas- or oil-fired Sündbrenner-Anlagen- (DD-PS 120 920, 90 bOO, DE-OS 2,854 21S, 2353 589) high-quality Priaerenergieträger, 2 »'B · in. The order of 30 t to 50 t fuel oil per startup ;

-S ^^ poor feed (DR PS 479 432, DD-PS 143 816, 7 637, DE-OS 2816 674) further additional preheating and / or high expenditure 'for wear repairsj

- rust-based pilot burner systems · (DD-PS 127 937, DE-AS 1067 558, 1044 336, DS-PS 879 751, DE-OS 1948 154) high system engineering · .. Prerequisites and separate feeds.

Object of the invention

Siel the invention is to achieve low maintenance high maintenance of the combustion chamber, without using primary energy sources or complex secondary energy sources.

Explanation of the essence of the invention

The invention has the object - to find a geeigenten secondary energy source for heating the combustion chamber, dss approaching steam generator and develop a procedural solution for the realization-,

This achieves, by this means, that according to the invention the pulverized coal / air mixture of a pulverized coal mill of a steam generator in operation is wholly or partly controllable into the coal dust main, auxiliary and / or ignition burner plant and / or or a pulverized coal mill of the steam generator to be approached, and after reaching the required combustion chamber burner temperature, the pulverized coal-air mixture is controllably injected via the coal dust-main burner furnace. The pulverized coal-air-oil mixture is passed through a separator-bunker System fed to the pilot burner system, conveyed via the auxiliary burner system to a grate arranged in the combustion chamber or ixbev the pulverized coal main burner and auxiliary burner system promoted to a host arranged in the combustion chamber · In deregistered induced draft of the approaching steam generator the resulting flue gases on a pulverized coal mill of the steam to be approached eugers promoted in the combustion chamber of the operating steam generator. In addition, premold heat from the steam generator in operation is controllably conveyed to the steam generator to be approached. To realize the Kohlenstaubkänal a pulverized coal mill of the operating steam generator with. the Kohlenstaubkanai a pulverized coal mill to be approached steam generator via a controllable

Connection line connected * The steam generator in operation and the steam generator to be approached have a host supplied with an auxiliary braking system, the auxiliary burner installations being connected via controlled pulverized coal ducts and connection lines and a cross connection being incorporated in the connection lines. The coal dust duct of a pulverized coal mill of the steam generator in operation is connected to the ignition and / or Eilfsbrenner system of the steam generator to be approached via a controllable connection line and the Kohlenstaubkanal a Kohlsnstaubmühle the steam generator to be approached with the ignition and / or auxiliary burner system in operation located steam generator connected via another controllable connection line.

embodiment

The invention is explained in more detail in one embodiment. The drawing shows:

Pig. 1: the binding of the pulverized coal-air mixture of the steam generator in operation in the steam generator to be approached,

Pig "2: the sinusoidal bonding of the coal dust-air mixture of the steam generator in operation" with host ,. /

FIG. 3 shows the sinter bonding of the pulverized coal / air mixture of the steam generator in operation with crossed connection lines. FIG.

Example 1 (Pig .. 1)

The steam generator 1A is in operation and the steam generator 1B is to be put into operation · the steam generators IA; 13 are connected to the pulverized coal pulverizers 2Aj: 23, the puffing gas recirculation 3A; 33, the allocators 4A; 43, the dust channels 5A; 5B with sliders-6A; 63 and flaps 7A; 7B and. the main coal dust burners SA; S3 equipped. ·

These are the coal dust Zündbrennsr systems. with the pilot burners 9A; 93, the separator banker systems 10A; 1OB, the flaps 1Aj and the sliders 12A; 13A; 14A; 15A; 123; 133; 143; 153 arranged. The dust channels 5A; 53 of the steam generators 1A,... 1B are connected via the pulverized coal-air-geyser connection line 16, the connections being

make it line 16 via lines 17A; 173 with the flue gas recirculation 3A; 33 is connected. In this case, the connecting line 16, the slider 13A; 18B and the lines 17A; 173, the sliders 19A; 193 on. Alternatively, instead of connecting line 16, connecting line 20 with sliders and lines 17A; 173 the. Lines 21Aj 21B. with sliders to arrange. The dust channels 5A; 5B have the vertical channels 22A; 22B; 23A; 233 and the horizontal channels 24A ;. 24B on. The Absorber Bunker System 1OA; 103 are connected via the lines 25A5 253 with the flue gas recirculation 3A 33.

The mode of action is the following:

The one in cold. Steam generator 1B is temporarily preheated by hot steam (hot air, flue gases) from the steam generator 1A in operation by an oil burner system and / or by the coal dust pilot burner 9B 103 with pre-bunkered coal dust. The further Anwärsien done so that the flaps 73; 11B in working position, the slide 143 ;. 183 closed, and the slide 6Aj 12B; 193 are opened. The in-service steam generator 1A is prepared so that the spool 18A is opened, the spool 19A is closed, and the door 7A is fully or partially closed, thus bringing the warm coal dust-air mixture into operation located steam generator '1A. via the connecting line 16 and the line 17B to the pulverized coal mill 23 which has been started up. The pulverized coal mill 23 fills the pulverized coal / air mixture of the steam generator 1A with the ignition burner, 93 "Should the pilot burner. 9B do not stably ignite, can, by opening the slide 143, the Abseheide-Bnnker- system 1OB. filled with recycled coal dust and. in order that the pilot burner be operated completely with bunkered pulverized coal when the slide 12B is closed or when the slide 12B is open When the heating chamber of the steam generator 13 heats up, the flap 7B is opened and the main coal separator SB is put into operation.

Upon reaching the temperature required for ignition in the combustion chamber, the distributor 4B is put into operation and the valves 18A .; 13B ;, 19A} 193 are closed, so that a safe operation of the pulverized coal main burner 33 is ensured. There are also other combined circuits. Modes of action

Seeds and alternate operations Zündbrermer, pulverized coal main burner and / or coal dust mill feasible. These modes are also achievable in that the connection 20 is connected to the lines 21A; 213 and the flaps 11A; 113 and the associated Schisbern in operation. This is the coal dust-air mixture of the steam generator 1A. via the channel 22A with open flap 11A ₁ closed slide 14-A via the connecting line 20 either via the line 213 in the flue gas duct 33 or with the flap closed 11B and opened Schieber.14B in the separator Bunäer-S-system 103 promoted.

However, the steam generator 1B, which is in the cold state, can also be preheated in the first start-up phase without foreign wands, oil burners or "without pre-bunkered dust, because the dried pulverized coal-air mixture passes from the mill 2A in operation

- Lines 1β, 173 in operation mill 23, channel 223 and or

- Lines 22A, 14A, 20 ', 143 in out of service ülühle 2B

the dust is bunkered in the separation bunker system 103 and then at the pilot burner 9A. ignited and burned. The further starting operation takes place as already described.

Example 2 (Mg. 2)

The steam generator TA "is in operation and the steam generator is to be put into operation * The steam generators 1A, 13 have the heaters 29A, 293 and the burners 28A, 2SB .. The burners 23A, 28B are connected via the connecting lines 26A 263 with flap 27 and the dust channels 5Aj 5B are connected to slides 18, 183 via the connecting line 16 '. The connecting lines 16, 26 are connected to each other via the line 30 *.

The mode of action is the following:

The steam generator 13 to be approached is prepared so that the slides 63; 183 are geschbssen and the flap 27 is brought into working position. The steam generator 13 is heated by residual heat (hot air, flue gases) from the steam generator 1A in operation by means of an oil burner system and / or by the pulverized coal firing system, which can also be operated with the burner 283.

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kertem coal dust preheated for a short time. Thereby, the slider 18A is opened, so that the coal dust-air mixture of the steam generator 1A in operation via the Yerbindungsleitung 16, the line 30 and the Verbindungsieitung 263 is conveyed to the burner 283. There, the pulverized coal-air geyser is ignited and blown on the grate 29B and settles there as a fuel layer. With the addition of air below the grate 293, a glowing layer forms, -velohe the coal dust-air mixture at the burner 283 constantly ignites. Upon reaching the Breankamraertemperatur with the glowing fuel layer on the grate 293 slide 13 A; 183 open and slide 6B closed and allocators 43 and. Kohlsnstaubiaühle 2B put into operation without warm flue gases are sucked from the steam generator 13 · This is done in the connecting line 16, a mixture of warm Sohlenstaub-air mixture from the steam generator 1A with the cold coal dust-air mixture from the steam generator 13. This mixture is conveyed via the line 30 and Yerbindungsleitung 26B to the burner 283 and blown onto the grate 29. 3in part of the mixture ignites immediately, the other rope is deposited on the glowing fuel layer and ignites there .. Thereafter, the slide 1Si. closed. The coal dust mill 23 is acted upon by the distributor 4B higher with increasing combustion chamber temperature, so that the heat output of the burner 233 and the grate 293 is gradually increased. At the same time, the gate 63 is opened step by step and the sole dust main burner TB is put into operation Part of the injected pulverized coal of the .Gemisches ignites in the lower part of the combustion chamber, the other part is deposited on the grate 293 and ignites there. With a stable flame on the pulverized coal burner 73, the slide 183 is closed and thus the burner 283 is taken out of operation. Again, other combined circuits and Pahrweisen for common, and alternate operation of a pilot burner system, the burner 283, the main pulverized coal burner 73 and / or the pulverized coal mill 23 can be realized.

Example 3 (Fig. 3)

This arrangement differs from FIG. 2 in that two connecting lines 16; 26 are provided and connected to a line 30.

The mode of action is the following:

It is thus possible to use each connected mill system 2A; 23 adjacent steam generator when approaching mill 2A with partially or fully closed slide oA and opened slide ISA processed dust-Luit-Geaiisch. to promote the burner 23B and at the same time with closed slide 30 and 633, open slide 18B and in operation mill 23 from the steam generator flue gas and also unswept coal dust on the Eauchgasrücksaugung to suck 3B and the connection they tion tion 1βΒ; Blow in 2oA at the burner 2SA «. This is in the starting operation, the A'bgasanlage the steam generator 13 out of service removable. By further combinations, already described and v / eiters manners can be realized via the connecting line 30.

By the invention v / earth the following advantages achieved: 1 «elimination of Heisöleinsatz for the purpose of starting.

2 * Start-up of the steam generator with processed coal dust without special storage of processed coal dust »

3. 3s is constantly recycled coal dust available either by the in-service, located steam generator or by bunkering.

4. Low technical requirements, that large bunkers and complicated Iieitungsführung and drive units for promotion accounts «. ,

5. External heat and flue gases can be conveyed at the same time through the connection lines ·

ß "Transport and swiveling connection cables ensure the maintenance and transport of the system *

Claims (5)

Srfindungsansprucb, 1. A method for starting a pulverized coal-fired steam generator, characterized in that the pulverized coal-air mixture of a Kohlenstaubrnühle a steam generator in operation wholly or partially controllable in dis coal dust main, auxiliary and /. Or -Zündbrenner plant and / or a coal dust mill of the steam generator to be approached and after reaching the BrennkaisEierteiüperatur required for the ignition on the coal dust main burner plant the coal dust-air Geinisch. taxable ^{x is} blown. 2 * Method according to item I _1, characterized in that the coal dust-air mixture is fed to the pilot burner system via a separator bunker system » 3. Arrangement according to item 7, characterized in that the connecting line is incorporated into a controllable dust line of the coal dust ducts after pulverized coal mill. 10. Arrangement for carrying out the method according to item 4, characterized in that the steam generator in operation and the steam generator to be approached have a grate loaded with an auxiliary burner system, wherein the auxiliary burner system is connected via controlled air-quenching dust ducts and connecting lines and in that the connecting lines is a cross connection integrated. '. 11. Arrangement for carrying out the method according to Funkt 1 to 5, characterized in that the coal dust duct a Kohlenstaubsiühls of the steam generator in operation with the ignition and / or auxiliary burner system of the steam generator to be approached is connected via a controllable connection line 'and that of the coal dust duct .a Kchlenstaubmünle the steam generator to be approached old of the ignition and / or auxiliary burner system of the steam generator in operation is connected via a further controllable connection line. 12 »arrangement according to item 11, characterized in that the connecting lines are connected by a controllable cross-connection. 3. The method according to item 1-, characterized in that the pulverized coal-air mixture is conveyed via the auxiliary burner system to a grate arranged in the combustion chamber * 4 »Method nach..Punkt 1 _r, characterized in that the coal dust-IiUft mixture is conveyed through the coal dust Hauütbrenner- and auxiliary burner Änlage on a host arranged in the combustion chamber. ', 5. The method according to item 4, characterized in that when out of service befindlicher induced draft of, to be approached steam generator, the resulting flue gases via a pulverized coal mill to be approached steam generator, be promoted in the combustion chamber of the operating steam steamer. 6. The method according to item 1 to 5, characterized in that additionally foreign wonders from the steam generator located in Batrieb in the approaching steam generator controlled promoted irird. 7. Arrangement for carrying out the method according to item 1, characterized in that the coal dust duct of a pulverized coal mill of the steam generator in operation with the coal dust duct a Sohlenstaubmünle of the approaching steam generator is connected via a controllable connection line » 8. Arrangement according to point 7, characterized in that the connection ¹ tion line is integrated immediately after pulverized coal mill in the coal dust channels. , 5 Npfra
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