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1. 发明专利

JPH0835611A POWER PLANT WITH FLUIDIZED-BED BOILER 失效
公开(公告)号：JPH0835611A
公开(公告)日：1996-02-06
申请号：JP17510494
申请日：1994-07-27
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MISHIMA NOBUYOSHI , UTAMURA MOTOAKI , KOMATSU HIDEAKI , MAO TAKASHI
IPC分类号： F23C10/28 , F22B1/02 , F23C10/16 , F23C11/02
摘要： PURPOSE:To enable bringing boiler operation to an emergency stop in a short time and shorten the time needed for the cooling in a power plant equipped with a fluidized-bed boiler forming a fluidized bed by providing a nozzle for feeding a cooling medium into the fluidized bed. CONSTITUTION:For example, with an atmospheric fluidized-bed boiler 1, a signal for exigency stop is transmitted to a control box 20 and a command signal from the control box 20 is made to stop the feeding of fuel, air for combustion, and air for fluidization. Furthermore, on the directions of a signal 31 a main inert-gas valve 28 is opened. Next by opening cooling intake dampers 24a, 24b, 24+c, 24d in this order as ordered by a signal 30 an inert gas from an inert-gas bomb 29 is injected through cooling-gas nozzles 23a, 23b, 23c, 23d into the upper part of the boiler furnace and into divided sections of the fluidized bed 5 so as to cool the boiler 1. After damping the fluidized bed to such a temperature as not to rekindle the unburnt coal therein, a blower 4 is actuated, a cooling-air damper 26 is opened as ordered by a signal 32, a signal 31 simultaneously issued causes the main inert-gas valve 28 to be turned off, and cooling air is injected though cooling-gas nozzles 23a, 23b, 23c, 23d.

2. 发明专利

JPS6338804A CONDENSATE DEVICE 失效
公开(公告)号：JPS6338804A
公开(公告)日：1988-02-19
申请号：JP18077486
申请日：1986-07-31
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KUBOTA SHOZO , KOMATSU HIDEAKI , HAMAURA KIICHI , ISHIMARU HITOSHI
IPC分类号： F22D11/00

3. 发明专利

JPH07208112A EXHAUST AFTERBURNING TYPE COMBINED PLANT OPERATING METHOD AND EXHAUST HEAT RECOVERING SYSTEM 失效
公开(公告)号：JPH07208112A
公开(公告)日：1995-08-08
申请号：JP567894
申请日：1994-01-24
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KUROBA SHIGEKI , ARASE HIROSHI , KURIBAYASHI TETSUZO , KOMATSU HIDEAKI
IPC分类号： F01K7/22 , F01K9/00 , F01K17/02 , F01K23/02 , F01K23/10 , F02C6/18
摘要： PURPOSE:To effectively use exhaust heat of a combined plant in air-conditioning, hot-water supply, and the like without returning excessive heat amount of a combined plant into a steam turbine cycle by separating a part of exhaust gas in a boiler, and supplying exhaust gas to the system outside a combined plant. CONSTITUTION:Exhaust gas of a boiler 5 is supplied to a high pressure gas heater 6 through a ventilation pipe 70, and heat recovery is carried out by the high pressure gas heater 6 at the time of feed water. Heat recovery is carried out by a low pressure gas heater 7 at the time of condensation, so that exhaust gas of the boiler 5 is cooled to about 100 deg. degree, and exhaust gas is discharged toward the atmosphere through a chimney 8. Especially, a branch pipe 71 for branching a part of exhaust gas of the boiler 5 is provided in the ventilation pipe 70. A heat accompanying supply plane 25 for supplying exhaust heat of boiler exhaust gas to the system outside a combined plant is arranged on one end of the branch pipe 71. It is thus possible to utilize exhaust heat of a power plant for air-conditioning, hot-water supply, and the like effectively without being influenced by the load fluctuation of a plant, improve overall heat efficiency, and reduce environmental pollution due to exhaust heat.

4. 发明专利

JPH06175729A DAMPER DEVICE AND GAS EQUIPMENT 失效
公开(公告)号：JPH06175729A
公开(公告)日：1994-06-24
申请号：JP32690192
申请日：1992-12-07
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MIYAKE SHOSUKE , KAWAUCHI AKIHIRO , KOMATSU HIDEAKI , KUROSAWA KAZUHIRO
IPC分类号： F16K31/00 , F23G5/50 , F23L3/00 , F23N3/06 , F23N5/24 , G05D7/06
摘要： PURPOSE:To reduce the cost of equipment by protecting the equipment without using a bypass line, etc., in consideration of the fault of a damper device. CONSTITUTION:The emergency drive means 14c and 15c are provided to open and close an emergency slat group 11c together with the flow rate control drive means 14a and 15a which open and close a flow rate control slat group 11a, an emergency control circuit 16c which inputs an emergency drive signal and controls the means 14c and 15c basing on the input emergency drive signal, and a flow rate control circuit 16a which inputs a control signal that controls the flow rate of gas passing through a gas path and controls the means 14a and 15a basing on the input control signal.

5. 发明专利

JPH07305608A BOILER EXHAUST HEAT RECOVERY EQUIPMENT OF FULL FIRED HEAT RECOVERY COMBINED PLANT 失效
公开(公告)号：JPH07305608A
公开(公告)日：1995-11-21
申请号：JP9606194
申请日：1994-05-10
申请人： HITACHI ENG CO LTD , HITACHI LTD
发明人： ARASE HIROSHI , KUROBA SHIGEKI , KURIBAYASHI TETSUZO , KOMATSU HIDEAKI
IPC分类号： F01K7/40 , F01K23/10 , F02C6/18 , F22B1/18 , F22B31/08
摘要： PURPOSE:To obtain boiler exhaust heat recovery equipment of a full fired heat recovery combined plant which shows excellence in economic performance and maintenance. CONSTITUTION:A condensate/forced draft air heat exchanger 20 is arranged in series to a condensate heating heat exchanger 7 in a condensate system III, and on a forced draft air feeding system I. A feedwater/forced draft air heat exchanger 21 is arranged serially to a feedwater heating heat exchanger 6 in a feedwater system IV, and on the forced draft air system I. Heat recovery to the forced draft air in the condensate/forced draft air heat exchanger 21 is conducted by condensate subjected to heat recovery from the boiler exhaust gas by the condensate heating heat exchanger 7. Heat to the forced draft air in the feedwater/forced draft air heat exchanger 20 is recovered by feedwater subjected to heat recovery from the boiler exhaust gas by the feedwater heating heat exchanger 6.

6. 发明专利

JPH06159008A MONITORING, PROTECTION, AND PERFORMANCE MANAGING DEVICE OF STEAM TURBINE FORCED COOLING DEVICE 失效
公开(公告)号：JPH06159008A
公开(公告)日：1994-06-07
申请号：JP31723092
申请日：1992-11-26
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SUZUKI SHINYA , KURIBAYASHI TETSUZO , KOMATSU HIDEAKI
IPC分类号： F01D25/00 , F01D25/12
摘要： PURPOSE:To carry out an effective monitoring and protection of a steam turbine forced cooling device and a turbine main engine in the forced cooling, and a highly accurate performance management which can predict the variation of the device performance following the change of the operating condition early, and can control the performance in an optimum condition. CONSTITUTION:Signals detected continuously by numerous detectors 19 to 31 provided to a steam turbine forced cooling device and to a turbine main engine are taken into a computer 32 to carry out a conversion, an operation, and a deciding process, the results are output to a CRT 33 to be displayed, and furthermore, when the turbine main engine or the device generates an abnormal condition, or the cooling property is made in a large deflection, it is output to an alarm device device 38 and a control device 43, so as to carry out an abnormality display and a protective control, or an optimum air flow control.

7. 发明专利

JPH0688601A FULL FIRED HEAT RECOVERY COMBINED PLANT, METHOD AND DEVICE FOR CONTROLLING ITS OPERATION, AND FUEL GAS-BURNING HEATER 失效
公开(公告)号：JPH0688601A
公开(公告)日：1994-03-29
申请号：JP23846292
申请日：1992-09-07
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YOSHINO SHOICHI , KUROSAWA KAZUHIRO , KOMATSU HIDEAKI
IPC分类号： F22B1/18
摘要： PURPOSE:To prevent overheating of condensate and feedwater that may occur when the load on the plant declines in the system of heating the condensate and feedwater by a gas-burning heater using the exhaust gas from the boiler. CONSTITUTION:A gas-burning heater 7 has a tubular heater comprising a primary heating tube 20 and a secondary heating tube 21 connected to each other. The inlet and outlet of the primary heating tube 20 open into piping channels 23A, 23B with the interposition of valves 22, 25 respectively. The secondary heating tube 21 is connected, on the side of its outlet, with a bypass 31 and also to the piping channel 23B with the interposition of a valve 29. When the load on the plant is high, water drawn in through the valve 22 is passed through the heating tubes 20, 21 and heated by exhaust gas from a downstream device 6 and the water thus heated is passed through the valve 29 and returned to the piping channel 23B. When the load on the plant is low, the water drawn in through the valve 22 and heated by passage through the heating tube 20 is in part returned to the piping channel 23B through the valve 25 and the rest of the water is heated further by passage through the secondary heating tube 21 and supplied to somewhere else through the bypass 31, not returned to the piping channel 23B.

8. 发明专利

JPS62189385A CONTROL DEVICE FOR NUMBER OF DRIVING PUMPS 失效
公开(公告)号：JPS62189385A
公开(公告)日：1987-08-19
申请号：JP3025486
申请日：1986-02-14
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHIMARU HITOSHI , KOMATSU HIDEAKI
IPC分类号： F04B49/06 , F04B49/00 , F04B49/02 , F04D15/00 , G21D3/04
摘要： PURPOSE:To prevent driving of a pump at the risk number of revolutions, by a method wherein the number of the driving pumps of a condensate feed system is controlled by means of a plant load, and during low load driving, control is made so that low and high pressure condensate pumps on the upper streams of a T-RFP (turbine-driven reactor water feed pump) are respectively brought into a one-pump driving mode. CONSTITUTION:When a plant load is below 25%, the number of driving low pressure condensate pumps 5 and that of driving high pressure condensate pumps 8 on the upper stream of a T-RFP 10 are brought into a one-pump driving mode by means of indicating devices 19 and 17, respectively. By preventing the occurrence of a fact that a suction pressure during running of the T-RFP 10 is increased any more than necessary, a RFP-T 21 is prevented from running at the risk number of revolutions. When a load exceeds 25%, in order to keep the suction pressure of the T-RFP 10 and an electric motor-driven water feed pump 11 at a high value, when it is detected by a detecting device 18 that a low pressure condensate pump 5 is one in the number of driving pumps, the number of driving high pressure condensate pump 8 can be set to one pump by means of an instruction device 17, and the number of the driving water feed pumps 11 can be set to one pump by means of an instruction device 15.

9. 发明专利

JPS61110877A Vacuum pump for condenser 失效
标题翻译：冷凝器真空泵
公开(公告)号：JPS61110877A
公开(公告)日：1986-05-29
申请号：JP23020784
申请日：1984-11-02
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： KANAZAWA MASAO , UENO TAKESHI , KOMATSU HIDEAKI , KONO TSUTOMU
IPC分类号： F28B9/10
CPC分类号： F28B9/10
摘要： PURPOSE:To increase holding capacity and to realize high vacuum operation of a condenser, by providing a steam ejector and a steam condenser to a water sealed rotary vacuum pump as a vacuum ejector for a condenser. CONSTITUTION:A steam ejector bypass valve 10 is closed, and driving steam is fed to a steam ejector 4 provided on the upstream side of a water sealed rotary vacuum pump 11, passing through a driving steam pipe 9, via a driving steam check valve 8 and a pressure reducing valve 17. The steam ejector 4 is operated by the steam to vacuumize the inside of a condenser up to the rated vacuum of it. Further, gas in the condenser 1 is sucked by the suction effect of a steam ejector 4. The driving steam and the sucked gas are mixed with each other, flowing into a steam condenser 5, exchanging heat with cooling water 6 at the inlet of a steam condenser, being condensed, and is discharged to a separator tank 12 by the water sealed rotary vacuum pump 11. With such an arrangement, holding capacity is increased by the steam ejector, and the capacity of a condenser can be increased without changing the water sealed rotary vacuum pump. Accordingly, high vacuum operation of a condenser can be taken place, suppressing the decrease of plant efficiency at the minimum possible.
摘要翻译：目的：为了提高容量并实现冷凝器的高真空运行，通过将蒸汽喷射器和蒸汽冷凝器提供给作为冷凝器的真空喷射器的水密封旋转真空泵。构成：关闭蒸汽喷射器旁通阀10，驱动蒸汽被供给到设置在水密封旋转真空泵11的上游侧的蒸汽喷射器4，通过驱动蒸汽管9经由驱动蒸汽止回阀8 和减压阀17.蒸汽喷射器4由蒸汽操作以将冷凝器的内部抽真空至其额定真空度。此外，冷凝器1中的气体被蒸汽喷射器4的吸入作用吸引。驱动蒸汽和吸入的气体彼此混合，流入蒸汽冷凝器5，与冷却水6在入口处的冷却水6进行热交换蒸汽冷凝器冷凝，并通过水密旋转真空泵11排出到分离罐12.通过这种布置，通过蒸汽喷射器提高了保持能力，并且可以增加冷凝器的容量而不改变水密封旋转真空泵。因此，可以发生冷凝器的高真空运转，尽量减少设备效率。

10. 发明专利

JP2002244115A CLEANING DEVICE FOR LIQUID CRYSTAL PANEL 失效
公开(公告)号：JP2002244115A
公开(公告)日：2002-08-28
申请号：JP2001036418
申请日：2001-02-14
申请人： HITACHI LTD
发明人： KOMATSU HIDEAKI , SAWAGUCHI TAKEO
IPC分类号： G02F1/13 , B08B1/04 , G02F1/1333
摘要： PROBLEM TO BE SOLVED: To reliably remove a foreign matter adhered to the surface of a glass substrate. SOLUTION: A cleaning device for a liquid crystal display panel is provided with a head part rotating and having a facing surface, parallel to and opposed to the surface of the liquid crystal display panel and a flat plate like blade attached to the facing surface on a virtual line, passing through the rotary axis of the head part the have 28-32 degrees for the inclined angle with respect to the surface of the liquid crystal display panel. The tip part of the blade is a wedge-shaped blade edge part, having 18-22 degrees angle toward the liquid crystal display panel side and 8-12 degrees angle toward the opposite side of the liquid crystal display panel to the inclined angle, and the blade edge has a flat part.

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