초록 ▼

A plurality of fuel nozzles X1 and X2 in combustor X are supplied with fuel gas from a fuel gas system and fuel oil from a fuel oil system, respectively. Gas turbine operation is performed with fuel being changed over to either gas or oil. Fuel oil distribution control system A controls oil flowing

A plurality of fuel nozzles X1 and X2 in combustor X are supplied with fuel gas from a fuel gas system and fuel oil from a fuel oil system, respectively. Gas turbine operation is performed with fuel being changed over to either gas or oil. Fuel oil distribution control system A controls oil flowing into a plurality of fuel pipings. When oil is changed over to gas, fuel oil purge system B is supplied with air of an appropriate temperature and pressure from purging air supply system C. This air flows into fuel oil pipings and nozzles X2 for purging residual oil therein. Fuel nozzle wash system D is supplied with water by-passing from a wash water tank for compressor washing. This water flows through nozzles X2 for washing thereof.

대표청구항 ▼

1. A gas turbine fuel oil purge system in a gas turbine fuel oil supply system comprising a plurality of fuel oil supply pipings for supplying fuel oil to a plurality of fuel nozzles via a header; and a drain piping connected to said plurality of fuel oil supplying pipings, wherein there are provide

1. A gas turbine fuel oil purge system in a gas turbine fuel oil supply system comprising a plurality of fuel oil supply pipings for supplying fuel oil to a plurality of fuel nozzles via a header; and a drain piping connected to said plurality of fuel oil supplying pipings, wherein there are provided a sealing connection pipe close to said fuel nozzles in each of said fuel oil supply pipings between said header and fuel nozzles; and a purging air supply piping for supplying air to each said sealing connection pipe, and each said sealing connection pipe causes the air from said purging air supply piping to flow toward said fuel nozzles as well as to flow into said fuel oil supply pipings on the opposite sides of said fuel nozzles to be discharged from said drain piping.