AUXILIARY STEAM PIPELINE FOR AUTONOMOUS STARTING OF UNIT ENGINE POWER 300 MW

摘要

Patent application refers to auxiliary steam pipelines for autonomous starting of 300MW power block in thermo electric power plant Nikola Tesla Obrenovac. Starting these blocks depends on operation of some other block for power supply of auxiliary steam of appropriate quality, primarily by steam for sealing turbine parts, which are initially under vacuum pressure. In case of simultaneous delay of all blocks, the starting is possible upon starting one of two blocks of engine power of 200MW which is risky for several reasons. Alternative to this is building in of auxiliary boiler house, which is as a standard approach, uneconomical. Building-in auxiliary steam pipeline, which couples boiler outlet inter-overheater (4) and turbine sealing system, solves this problem. For all this, inter-overheater (4) of boiler is maintained under pressure of 6 bar (no steam circulation), and by coupling two beams (3) of outlet inter-overheater (4) in series, even desirable temperature can be achieved around 300°C, by means of this is obtained high-quality auxiliary steam for sealing turbine (13) and also for the needs of some other consumers at starting the block, in this case - from proper sources.;Prijava patenta se odnosi na pomone parovode za autonomno startovanje bloka snage 300 MW u TENT-A Obrenovac. Startovanje ovih blokova je uslovljeno radom nekog drugog bloka radi snabdevanja pomonom parom odgovarajueg kvaliteta, prvenstveno parom za zaptivanje delova turbine koji su u startu pod vakuumskim pritiskom. U sluaju istovremenog zastoja svih blokova pokretanje je mogue po startu jednog od dva bloka snage 200 MW to je, iz vie razloga, riskantno. Alterntiva ovome je izgradnja pomone kotlarnice to je, kao klasian pristup, neracionalno. Ugradnjom pomonog parovoda koji spaja izlazni medjupregreja (4) kotla i sistem zaptivanja turbine ovaj problem se reava. Pri tome, medjupregreja (4) kotla se odrava pod pritiskom od 6 bar (bez cirkulacije pare), a povezianjem dva snopa (3) izlaznog medjupregrejaa (4) u serijski niz, moe se postii i poeljna temperatura oko 300В°C, ime se dobija kvalitetna pomona para za zaptivanje turbine (13) i za potrebe nekih drugih potroaa pri startovanju bloka, u ovom sluaju - iz sopstvenog izvora.[Patent application refers to auxiliary steam pipelines for autonomous starting of 300MW power block in thermo electric power plant Nikola Tesla Obrenovac. Starting these blocks depends on operation of some other block for power supply of auxiliary steam of appropriate quality, primarily by steam for sealing turbine parts, which are initially under vacuum pressure. In case of simultaneous delay of all blocks, the starting is possible upon starting one of two blocks of engine power of 200MW which is risky for several reasons. Alternative to this is building in of auxiliary boiler house, which is as a standard approach, uneconomical. Building-in auxiliary steam pipeline, which couples boiler outlet inter-overheater (4) and turbine sealing system, solves this problem. For all this, inter-overheater (4) of boiler is maintained under pressure of 6 bar (no steam circulation), and by coupling two beams (3) of outlet inter-overheater (4) in series, even desirable temperature can be achieved around 300В°C, by means of this is obtained high-quality auxiliary steam for sealing turbine (13) and also for the needs of some other consumers at starting the block, in this case - from proper sources.