Using IGCC technology to optimize the producer gas generator system
The producer gas generator adopted technology, widespread efficiency not high question, investigate its reason, is mainly because the energy is not complete. Therefore, we can use IGCC technology to mature, the producer gas generator technology to further improve, improve the efficiency of power generation.
IGCC is the "gas steam combined cycle power generation technology," from coal gas purification, gas turbine, steam generator is composed of three parts. IGCC technology is the use of fuel energy and heat energy power generation, including gas power and steam generation two stages. The first phase, combustion gas is the use of kinetic energy, the expansion of the gas burning after the second stage, recovery of high temperature flue gas burning power generation after the exclusion of, production of steam power generation, is the use of thermal energy. At present, the producer gas generator system, use only the first stage of IGCC or second stage, supplemented the lack of power stage, becomes a IGCC small power stations, power generation efficiency is improved obviously.
As far as IGCC is concerned, the gasifier, gas turbine and steam power generation equipment form without a fixed choice, according to the power station installed capacity, investment in areas such as Europe and the United States, Japan, and now Chinese built power plants in large scale, generally in the 250MW above, in the selection of the gas stove, it cannot choose the production of smaller atmospheric fixed bed coal gasifier, because of the need to select hundreds of furnace, so the general choice of pure oxygen gasification, and for 30MW the following power station, considering the gasification furnace capacity and investment issues, the atmospheric fixed bed gas producer is the best choice.
For example, an hour generating capacity of 10MW furnace gas power station, need to set the 500 kilowatt gas internal combustion generator sets 18 sets, each generator can be discharged flue gas 500-600 ℃ 12000m3/h, the production of steam for steam turbine power generation, every hour can power generation 2-3MW. Using IGCC technology, the efficiency of generating furnace gas power generation system is 1.2 - 1.3 times the original.