摘要:
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.
摘要:
In a power generating plant which utilizes fuel gas for combustion at a predetermined pressure to drive a primary load, and where the fuel gas is supplied at a pressure higher than the predetermined pressure, an improvement is provided wherein a fuel gas expander is located downstream of a source of the fuel gas and upstream of a combustor for decreasing the pressure of the fuel gas, and wherein excess energy from the expander is used to drive a secondary load.
摘要:
In a power generating plant which utilizes fuel gas for combustion at a predetermined pressure to drive a primary load, and where the fuel gas is supplied at a pressure higher than the predetermined pressure, an improvement is provided wherein a fuel gas expander is located downstream of a source of the fuel gas and upstream of a combustor for decreasing the pressure of the fuel gas, and wherein excess energy from the expander is used to drive a secondary load.
摘要:
Low grade heat recovered from various sections of an integrated gasification system is used to drive an absorption chilling cycle. In an exemplary embodiment, the recovered low grade heat is used to heat a two component working solution that is pumped through a closed cycle absorption chilling system. The heated working solution is separated into a rich stream and a lean stream. The rich stream is condensed to produce a liquid rich stream that is throttled to reduce its temperature and then evaporated to produce a cooling load. The cooling load may be used for auxiliary cooling needs in the integrated gasification system. The rich vapor stream produced by the evaporating step is mixed with the lean stream to produce a mixed stream, which is cooled in an absorber to produce the working solution for the cycle to be repeated.
摘要:
An integrated turbomachine plant is provided and includes a combustor a turbomachine operably connected to the combustor and including a compressor and a turbine expander, a pathway to flow compressed air from the compressor through the turbine expander to heat the compressed air, an additional pathway by which high temperature fluids output from the turbomachine are employed to heat the compressed air and an air separation unit operably connected to the pathway and configured to separate the heated compressed air into oxygen and oxygen-depleted air.
摘要:
The present application thus provides an integrated gasification combined cycle system. The integrated gasification combined cycle system may include a water gas shift reactor system and a heat recovery steam generator. The water gas shift reactor system may include a recirculation system with a recirculation heat exchanger to heat a flow of syngas. The heat recovery steam generator may include a diverted water flow in communication with the recirculation heat exchanger.
摘要:
An external fluid in a closed loop is used to cool hot gas path components of gas turbine. After cooling the turbine components, the heated external fluid is dumped either in the compressor discharge casing or in the one of the turbine's stages. Where the external fluid is nitrogen to be dumped in the turbine compressor's discharge casing, the nitrogen is compressed using diluent nitrogen compressors. Alternatively, where the external fluid is nitrogen to be dumped in one of the stages of the turbine, the nitrogen is not compressed at all. The turbine blade heat exchangers in the turbine stages through which the nitrogen passes can be connected in parallel or in series for cooling the hot gas path components in the turbine stages. The nitrogen can optionally be mixed with air or steam or not mixed at all.
摘要:
A power plant is provided and includes a gas turbine engine having a combustor in which compressed gas and fuel are mixed and combusted, first and second supply lines respectively coupled to the combustor and respectively configured to supply the compressed gas and the fuel to the combustor and an exhaust gas recirculation (EGR) system to re-circulate exhaust gas produced by the gas turbine engine toward the combustor. The EGR system is coupled to the first and second supply lines and configured to combine first and second portions of the re-circulated exhaust gas with the compressed gas and the fuel at the first and second supply lines, respectively.
摘要:
A power generation system capable of eliminating NO components in the exhaust gas by using a 3-way catalyst, comprising a gas compressor to increase the pressure of ambient air fed to the system; a combustor capable of oxidizing a mixture of fuel and compressed air to generate an expanded, high temperature exhaust gas; a turbine that uses the force of the high temperature gas; an exhaust gas recycle (EGR) stream back to the combustor; a 3-way catalytic reactor downstream of the gas turbine engine outlet which treats the exhaust gas stream to remove substantially all of the NOx components; a heat recovery steam generator (HRSG); an EGR compressor feeding gas to the combustor and turbine; and an electrical generator.
摘要:
A system and method for recovering heat from dirty gaseous fuel (syngas), wherein the pressure of clean fuel gas is elevated to a pressure higher than that of the dirty syngas and then the pressurized clean fuel gas is fed to a heat recovery unit for heat exchange with the dirty syngas. Consequently, in the event of a leak in the heat recovery unit, the flow is from the clean fuel side to the dirty syngas side, thereby avoiding the possibility of contamination of the clean fuel gas.