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1. 发明专利

JPH02157021A AMMONIA GAS PRODUCING APPARATUS FROM AMMONIA WATER 失效
公开(公告)号：JPH02157021A
公开(公告)日：1990-06-15
申请号：JP31101988
申请日：1988-12-10
申请人： BABCOCK HITACHI KK
发明人： EMOTO SHUNJI
IPC分类号： B01D53/94
摘要： PURPOSE:To separate NH3 gas by heating ammonia water. CONSTITUTION:Once stored ammonia water (a) in an ammonia water tank 11 by an ammonia water storage apparatus 10 is sent to an NH3 gas producing apparatus 20 by a pump 12. The flow rate of the ammonia water to meet the necessary amount of NH3 for a denitrification apparatus 40 is controlled by an adjusting valve 13. The ammonia water (a) sent to the NH3 gas producing apparatus 20 is heated so as to evaporate and separate saturated NH3. NH3 is evaporated and separated from the ammonia water perfectly and the ammonia water turns into harmless hot water. Meanwhile, supersaturated NH3 evaporated by heating is flow-transported by sending air from an air fan 31, and the resulting diluted NH3 (c) is injected to a flue 33 through a nozzle grid 32 set in the upper stream of a denitrification apparatus 40. By this method, ammonia gas is obtained from an ammonia water. Since NH3 is injected into the flue, even if sulfur oxide is present therein, corrosion of a tube does not occur and troubles of choking the tube with dust is prevented.

4. 发明专利

JPH01297130A EXHAUST GAS TREATMENT DEVICE 失效
公开(公告)号：JPH01297130A
公开(公告)日：1989-11-30
申请号：JP12715488
申请日：1988-05-26
申请人： BABCOCK HITACHI KK
发明人： EMOTO SHUNJI , MORI YOSHIMICHI , OGASAWARA TORU , KOUFUKU HIDEO , YOSHITAKE TSUNEO
IPC分类号： B01D46/00 , B01D53/86 , B01D53/94 , F02B3/06
摘要： PURPOSE:To allow exhaust gas to pass through an oil mist capturing device if oil mist is contained in the exhaust gas and thereby realize the efficient capturing of the oil mist by providing the oil mist capturing device in an exhaust gas flow path between a denitrification device and an exhaust gas generation source. CONSTITUTION:A denitrification device 3 is arranged in the downstream of an exhaust gas generation source where oil mist is mixed with the exhaust gas when a diesel engine 1 is started. An oil mist capturing device 7 is arranged in an exhaust gas flow path between the denitrification device 3 and the exhaust gas generation source. If the exhaust gas contains the oil mist, it is allowed to pass through the oil mist capturing device 7. Consequently, the oil mist can be captured efficiently, and if such a capturing is no longer necessary, the whole plant efficiency can be maintained at a high level without deteriorating the denitrification efficiency of the denitrification device located in the downstream.

8. 发明专利

JPH0194926A DENITRATION APPARATUS 失效
公开(公告)号：JPH0194926A
公开(公告)日：1989-04-13
申请号：JP25153887
申请日：1987-10-07
申请人： BABCOCK HITACHI KK
发明人： MORI YOSHIMICHI , EMOTO SHUNJI
IPC分类号： B01D53/94 , B01D53/86
摘要： PURPOSE:To enable a homogeneous dispersion of NH3 gas while preventing openings of upward nozzles for ammonia injection from being choked up with dust by arranging dust shelter plates over the nozzles of ammonia injection pipes. CONSTITUTION:Dust piled up on a vertical duct 9 or internal reinforcing members 12 during the operation of a boiler is apt to drop out and fail down at the start-up or shut-down of the boiler. By arranging a dust shelter plate 15 over every NH3 injection nozzle 11, a falling dust 13 is caught by a dust shelter plate 15 and an NH3 injection nozzle 11 underneath the plate 15 is not choked up with the falling dust 13. NH3 gas from the injection nozzle 11 collides with the dust shelter plate 15 and mixed with a flue gas homogeneously, resulting in an improvement in a denitration performance. Furthermore, the lower face of the dust shelter plate 15 is prevented from a dust adhesion, because an NH3 gas film is formed.

10. 发明专利

JPH11201403A BOILER DEVICE 失效
公开(公告)号：JPH11201403A
公开(公告)日：1999-07-30
申请号：JP129698
申请日：1998-01-07
申请人： BABCOCK HITACHI KK
发明人： MARUISHI KAZUYUKI , EMOTO SHUNJI
IPC分类号： F22B37/14
摘要： PROBLEM TO BE SOLVED: To improve the durability (to leasen life consumption) of a furnace waterwall, by reducing the temperature difference in feedwater within the furnace waterwall at start of a boiler. SOLUTION: If cold water collected in a downcomer 3 flows into furnace waterwalls 4 and 5 together with the feedwater having passed an economizer 1 at start of a boiler (especially, at cold start), the feedwater lower in temperature than the feedwater heated with an economizer 1 flows to the furnace waterwalls 4 and 5, so it follows that two types of water different in temperature coexists within the waterwalls 4 and 5, which shortens the life of waterwalls 4 and 5. So, the cold water collected in a downcomer 3 is returned to a drum 2 by the circulation pump 7 provided in a pipe 8 for circulation at start of a boiler. Hereby, the feedwater at equal temperature mixed within the drum 2 can be sent to the waterwalls 4 and 4, so it becomes possible to reduce the temperature difference arising between the waterwalls 4 and 5.

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