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1. 发明专利

JPH10204451A DECREASE IN NITROGEN OXIDE ON STARTUP OF COAL GASIFICATION PLANT 失效
公开(公告)号：JPH10204451A
公开(公告)日：1998-08-04
申请号：JP1232197
申请日：1997-01-27
申请人： BABCOCK HITACHI KK
发明人： HIRONO YUICHIRO , HANAYAMA FUMIHIKO
IPC分类号： C10J3/46
摘要： PROBLEM TO BE SOLVED: To decrease nitrogen oxides(NOx) on the start-up of coal gasifier to inhibit the pH drop of the waste water from the gas washer and facilitate the waste water treatment by operating the start-up burner using an oxygen- excessive air and injecting ammonia gas into the coal gasification furnace. SOLUTION: In the coal gasifier equipped with the coal gasification furnace 6 by reaction of coal 1 with a gasification agent, the start-up burner 25 arranged in the coal gasification furnace 6 and the gas-washing means as a water-washing column 15, the start-up burner 25 is operated in an oxygen-excessive state at the start up of the coal gasifier, ammonia gas 27 is injected into the coal gasification furnace to reduce the NOx at the start-up of the coal gasifier.

2. 发明专利

JP2002250206A COAL GASIFICATION POWER GENERATION SYSTEM 失效
公开(公告)号：JP2002250206A
公开(公告)日：2002-09-06
申请号：JP2001045922
申请日：2001-02-22
申请人： ELECTRIC POWER DEV CO , BABCOCK HITACHI KK
发明人： IRITANI JUNICHI , HIRONO YUICHIRO , WATABE YOSHIKI
IPC分类号： F01D17/00 , C10J3/46 , F01K23/10
摘要： PROBLEM TO BE SOLVED: To prevent misfire of a gas firing apparatus, by ensuring a minimum gas flow rate required to keep combustion of the gas firing apparatus, in a coal gasification power generation system. SOLUTION: In a coal gasification furnace 8, combustible gas is generated from fine powder carbon and gasifying agent. After removing char 13 from the combustible gas by a cyclone 17 and a char filter 18, the combustible gas is demineralized by a flushing column 24, and is desulfurized by an absorbing column 26 to be purified gas 29. A gas turbine 31 is rotated by using the Purified gas 29 as fuel, and a power generator 32 is driven by the rotations of the gas turbine. The gas firing apparatus 38 is disposed to burn the purified gas 29 at the time of trip or fluctuation of load of the gas turbine 31. A pressure regulating valve 39 is disposed in front of the gas burning apparatus 38, and the opening angle of the pressure regulating valve 39 is controlled so that the pressure in the coal gasification furnace 8 is constant. A flowmeter 40 and a flow regulating valve 41 are disposed parallel with the pressure regulating valve 39, so that the minimum flow rate of the purified gas 29 required for keeping the combustion is introduced into the gas burning apparatus 38.

3. 发明专利

JP2000328074A COAL GASIFICATION SYSTEM 失效
公开(公告)号：JP2000328074A
公开(公告)日：2000-11-28
申请号：JP14090599
申请日：1999-05-21
申请人： BABCOCK HITACHI KK
发明人： HIRONO YUICHIRO
IPC分类号： C10J3/46
摘要： PROBLEM TO BE SOLVED: To prevent condensation of the water content in a gas when a carrier gas is mixed with a powder fuel and to stably effect carrying of the powder fuel. SOLUTION: This system has a coal gasification furnace 8 for forming a combustible gas by reacting pulverized coal with a gasifying agent, and the pulverized coal obtained by grinding coal is supplied to this coal gasification furnace 8. Further, char 13 is generated upon forming a combustible gas and this char 13 is recovered by a cyclone 17 and a filter 18 and recycled to the coal gasification furnace 8. In such a coal gasification system, part of the combustible gas after recovering the char is withdrawn and heated by a heat exchanger 44. Then, with the use of the combustible gas after heating as the carrier gas, the pulverized coal and the char are supplied to the coal gasification furnace 8.

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