초록 ▼

An integrated gasification combined cycle plant is combined with a Kalina bottoming cycle. High thermal energy streams 31, 69, 169 from the gasification system are provided in heat exchange relation with the two component working fluid mixture at appropriate locations along the Kalina bottoming cycl

An integrated gasification combined cycle plant is combined with a Kalina bottoming cycle. High thermal energy streams 31, 69, 169 from the gasification system are provided in heat exchange relation with the two component working fluid mixture at appropriate locations along the Kalina bottoming cycle units to supplement the thermal energy from the gas turbine exhaust 28 which heats the working fluid supplied to the vapor turbines. Particularly, low temperature heat recovery fluid from the low temperature cooling section 50b of the gasification system lies in heat exchange relation 27 with the condensed working fluid from the distillation/condensation sub-system of the Kalina cycle to preheat the working fluid prior to entry into the heat recovery vapor generator 12. Heat recovery fluid from the high temperature gas cooling section 50a of the gasification system is placed in heat exchange relation 23 and 65 with the working fluid at an intermediate location along the heat recovery vapor generator 12. By supplementing the heat of the gas turbine exhaust with available heat from the gasification system, and optimal integration, increased power output and improved efficiency are obtained.

대표청구항 ▼

[ What is claimed is:] [1.]1. In an integrated gasification combined cycle power generating system having a plurality of turbines, including first and second vapor turbines and a gas turbine for driving one or more generators for generating electricity or mechanical work, and a fuel gasifier for gen

[ What is claimed is:] [1.]1. In an integrated gasification combined cycle power generating system having a plurality of turbines, including first and second vapor turbines and a gas turbine for driving one or more generators for generating electricity or mechanical work, and a fuel gasifier for generating fuel gas for the gas turbine, a method of operating the system comprising the steps of:(a) generating fuel gas from the fuel gasifier;(b) providing a heat recovery fluid from the fuel gasifier;(c) supplying the fuel gas from said fuel gasifier to a combustor for the gas turbine to drive the gas turbine;(d) expanding a two-component working fluid through the first vapor turbine;(e) reheating the expanded two-component working fluid from the first vapor turbine;(f) expanding the reheated two-component working fluid through the second vapor turbine;(g) condensing the working fluid exhausted from said second vapor turbine in a distillation/condensation sub-system;(h) passing the condensed working fluid in heat exchange relation with hot exhaust gases from the gas turbine for flowing heated working fluid to the vapor turbines; and(i) additionally heating the two-component working fluid supplied to the vapor turbines by passing the working fluid in heat exchange relation with the heat recovery fluid.