COMBINED POWER PLANT AND OPERATING METHOD OF THE SAME

In accordance with one aspect of the present invention, a combined power generation system includes: a gas turbine generating a rotating force by combusting fuel; an exhaust heat recovery boiler heating water by using combustion gas discharged from the gas turbine and provided with a high-pressure u...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	CHA SONG HUN, KANG SUNG GJU, BAK BYOUNG GU, HA HONG GEUN
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS ENGINE PLANTS IN GENERAL ENGINE PLANTS NOT OTHERWISE PROVIDED FOR ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METHODS OF STEAM GENERATION NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ACCUMULATORS STEAM BOILERS STEAM ENGINE PLANTS STEAM ENGINES STEAM GENERATION WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	In accordance with one aspect of the present invention, a combined power generation system includes: a gas turbine generating a rotating force by combusting fuel; an exhaust heat recovery boiler heating water by using combustion gas discharged from the gas turbine and provided with a high-pressure unit, a medium-pressure unit and a low-pressure unit having different pressure levels; a fuel preheater heating the fuel supplied to the gas turbine and provided with a primary heating unit and a secondary heating unit; a high-pressure water supply pipe connected to the high-pressure unit to supply high-pressure water to the secondary heating unit; a water delivery pipe connecting the secondary heating unit and the primary heating unit to supply the water discharged from the secondary heating unit to the primary heating unit; and a water supply control pipe connected to the medium-pressure unit to supply medium-pressure water to the water delivery pipe, wherein the water supplied to the secondary heating unit through the high-pressure water supply pipe is formed of liquid, and the phase of the water is unchangeable in the fuel preheater. Therefore, the present invention is capable of preventing an impact and vibrations from occurring due to a phase change in water. 본 발명의 일 측면에 따른 복합 발전 시스템은 연료를 연소하여 회전력을 발생시키는 가스 터빈, 상기 가스 터빈에서 배출되는 연소 가스를 이용하여 급수를 가열하며 압력 레벨이 서로 상이한 고압부, 중압부, 저압부를 갖는 배열회수 보일러, 상기 가스 터빈으로 공급되는 연료를 가열하며 1차 가열부와 2차 가열부를 갖는 연료 예열기, 상기 고압부와 연결되어 상기 2차 가열부에 고압 급수를 공급하는 고압 급수관, 상기 2차 가열부와 상기 1차 가열부를 연결하여 상기 2차 가열부에서 배출된 급수를 상기 1차 가열부로 공급하는 급수 전달관, 상기 중압부와 연결되어 상기 급수 전달관으로 중압 급수를 공급하는 급수 제어관을 포함하며, 상기 고압 급수관을 통해서 상기 2차 가열부로 공급되는 급수는 액체로 이루어지고, 상기 연료 예열기에서 상기 급수의 상(phase)이 불변할 수 있다.