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1. 发明专利

JPH11350974A PRESSURISED FLUIDISED BED TYPE COMBINED POWER PLANT 失效
公开(公告)号：JPH11350974A
公开(公告)日：1999-12-21
申请号：JP16175598
申请日：1998-06-10
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SATO KAZUHIKO , MISHIMA NOBUYOSHI , MAO TAKASHI
IPC分类号： F02C3/28 , F02C7/00
摘要： PROBLEM TO BE SOLVED: To prevent corrosion due to dew formation on the gas turbine by-pass piping when the gas turbine by-pass system is not used. SOLUTION: For the purpose that the gas that stays in a by-pass piping 8 in the downstream side of a by-pass valve 9 does not get condensed by the heat radiation of the by-pass piping and form dews by highly moist combustion gas flown in through a gas turbine exhaust duct 6, a piping 12 for supplying dry air is provided to the by-pass valve outlet piping. Accordingly, corrosion of the gas turbine by-pass piping 8 is prevented.

2. 发明专利

JPH1054211A BM TANK EXHAUST GAS COOLER HEAT RECOVERY DEVICE AND PRESSURIZED FLUID FLOOR COMBINED PLANT 失效
公开(公告)号：JPH1054211A
公开(公告)日：1998-02-24
申请号：JP21276496
申请日：1996-08-12
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： TSUCHIDA SHINICHIRO , MAO TAKASHI , MISHIMA NOBUYOSHI , YOSHINARI YUKIMASA
IPC分类号： F01K9/00 , F01K23/02 , F01K23/10 , F02C3/28 , F22B1/02 , F22B1/18
摘要： PROBLEM TO BE SOLVED: To provide a BM exhaust gas cooler heat recovery device which can correspond to a processing of a BM tank exhaust gas cooler recovery heat quantity by improving a plant efficiency at the time of a normal drive and a fall rate at the time of load drop in a pressurized fluid floor boiler combined power generation plant. SOLUTION: In a pressurized fluid floor combined plant, a BM tank exhaust cooler 20 is set between a BM tank 19 and an inlet gas piping of the exhaust heat recovery heat exchanger 11. A piping 45 and a vane 15 for guiding water supply and water circulation which serve as a medium for receiving heat, a vane 16 or piping 58 and 59, and a vane 57 for guiding water to a water circulator 8 after heat recovery, and piping 61 and 62 and a vane 60 for guiding water to a blow down tank 63 after heat recovery are provided. At a normal operation of the plant, exhaust gas to the BM tank can be cooled, and at the same time, a high temperature supply water is supplied to the pressurized fluid floor boiler, recycled heat amount can be dumped to a water circulator at the time of the load drop. At the time of an unusual condition, the recycled heat amount can be exhausted with the result that a plant can be constituted which has attained an efficient normal drive and is improved in load drop rate and which can correspond to an operation at the time of a drive in an unusual condition.

3. 发明专利

JP2001090507A ELECTRIC POWER PLANT 失效
公开(公告)号：JP2001090507A
公开(公告)日：2001-04-03
申请号：JP27069599
申请日：1999-09-24
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YOSHINARI YUKIMASA , MAO TAKASHI , UENO TAKESHI , MISHIMA NOBUYOSHI , HIRONO MASAMITSU
IPC分类号： F01K7/24 , F01K23/06 , F01K23/10
摘要： PROBLEM TO BE SOLVED: To enhance reliability of an electric power plant, and suppress shortening of the life of a steam turbine, when the plant is stopped emergently. SOLUTION: This power plant includes a pressurized fluidized-bed boiler 6, a main steam pipe 7 for introducing steam from the boiler 6 to a high- pressure turbine 18, a low temperature reheated-stream pipe 19 for introducing the steam form an outlet of the turbine 18 to a reheater 20, a high-temperature reheated-steam pipe 21 for introducing the steam from the reheater 20 to a medium-pressure turbine 22, a gland steam supplying mother pipe 44 for supplying gland steam to a turbine gland part 45 for the respective turbines 18, 22 and a deaerator 29 for deaerating condensate. The steam pipe 21 is connected to the mother pipe 44 by a high-temperature reheated-steam supplying pipe 49 interposed with an inlet valve 50 for a high-temperature reheated-steam supplying valve 51 and the valve 51, and the steam pipe 19 is connected to the steam supplying pipe 49 in the downstream of the steam supplying pipe 51 by a low-temperature reheated-steam supplying pipe 52.

4. 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.

5. 发明专利

JPH06213401A PRESSURIZED FLUIDIZED BED COMBINED PLANT 失效
公开(公告)号：JPH06213401A
公开(公告)日：1994-08-02
申请号：JP734293
申请日：1993-01-20
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SUZUMURA TAKESHI , MISHIMA NOBUYOSHI , SATO KAZUHIKO , MAO TAKASHI , MORIYA SHINICHI
IPC分类号： F01D15/10 , F01K13/00 , F01K23/02 , F01K23/06 , F01K23/10 , F22B1/02
摘要： PURPOSE:To make minimum or avoide a reverse response of a gas turbine output by constructing a gas turbine and a steam turbine as a single shaft coupled construction and absorbing a delayed response operation of the gas turbine by making use of an increased moment of inertia of the coupled construction. CONSTITUTION:Combustion gas 30 of a pressurized fluidized bed boiler 3 is supplied to an expansion turbine 12 through a fuel gas piping 32 after passage of a dust removal device 31 and a precision dust removal device 31 to generate power. A gas turbine 4, a steam turbine 5 and an electric generator 6 are mechanically connected through a shaft, and the power of the expansion turbine 12 serves to drive an air compressor 11 and the electric generator 6. With an increase of moment of inertia caused by the one shaft arrangement of the gas turbine 4 and the steam turbine 5, there can be minimized and absorbed the follow-up of the gas turbine to the electric generator due to the promotion of an in-furnace combustion reaction caused by an increase of the capacity of a pressure vessel of the pressurized fluidized bed boiler upon a change in a load.

6. 发明专利

JP2012158996A Thermal power plant with carbon dioxide capture scrubbing equipment 有权
标题翻译：二氧化碳捕集设备热电厂
公开(公告)号：JP2012158996A
公开(公告)日：2012-08-23
申请号：JP2011017391
申请日：2011-01-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MISHIMA NOBUYOSHI , SUGIURA TAKASHI , SAKAKURA TAKAHIKO
IPC分类号： F01K17/02 , B01D53/62 , C01B32/50 , F01K7/38 , F01K9/00 , F22B3/00
CPC分类号： F22B1/006 , B01D53/1425 , B01D53/1475 , B01D2257/302 , B01D2257/404 , B01D2258/0283 , B01D2259/65 , F01K13/00 , Y02A50/2342 , Y02C10/04 , Y02C10/06 , Y02E10/46 , Y02E20/326
摘要： PROBLEM TO BE SOLVED: To provide thermal power plant with a carbon dioxide capture scrubbing equipment that suppresses reductions in the efficiency and output of a steam turbine, and, at the same time, reduces variations in the amount of steam supplied from a solar heat collection apparatus to a reboiler and variations in the temperature and pressure of reboiler generated steam, and stably carries out reactions for separating carbon dioxide from an absorbent by heating.SOLUTION: The thermal power plant with the carbon dioxide capture scrubbing equipment includes a carbon dioxide separating-absorbing device 200 for capturing carbon dioxide from boiler exhaust gas, and the solar heat collection apparatus 300. Steam generated by the solar heat collection apparatus 300 is supplied to the reboiler 26 provided for a regeneration tower 21 of the carbon dioxide separating-absorbing device 200. When the amount of steam generated by the solar heat collection apparatus 300 falls below the amount of steam required for the reboiler 26, extraction steam extracted from the steam turbine 2 is supplied to the reboiler 26, and when the amount of steam generated by the solar heat collection apparatus 300 exceeds the amount of steam required for the reboiler 26, surplus steam of the solar heat collection apparatus 300 is discharged to a condenser 3.
摘要翻译：要解决的问题：为火力发电厂提供二氧化碳捕集洗涤设备，其抑制蒸汽轮机的效率和输出的降低，并且同时减少从一个蒸汽轮机供应的蒸汽量的变化再沸器的太阳能热收集装置和再沸器产生的蒸汽的温度和压力的变化，并且稳定地进行通过加热从吸收剂中分离二氧化碳的反应。解决方案：具有二氧化碳捕集洗涤设备的火力发电厂包括用于从锅炉废气中捕获二氧化碳的二氧化碳分离吸收装置200和太阳能热采集装置300.太阳能热采集装置产生的蒸汽 300被供给到用于二氧化碳分离吸收装置200的再生塔21的再沸器26.当太阳能热收集装置300产生的蒸汽量低于再沸器26所需的蒸汽量时，提取蒸汽从蒸汽轮机2抽出的蒸气被提供给再沸器26，并且当太阳能热收集装置300产生的蒸汽量超过再沸器26所需的蒸汽量时，太阳能热收集装置300的多余的蒸汽被排放到冷凝器3.版权所有（C）2012，JPO＆INPIT

7. 发明专利

JP2000213306A PRESSURE FLUIDIZED BED COMPOUND POWER PLANT 失效
公开(公告)号：JP2000213306A
公开(公告)日：2000-08-02
申请号：JP1293399
申请日：1999-01-21
申请人： HITACHI LTD
发明人： YOSHINARI YUKIMASA , MAO TAKASHI , UENO TAKESHI , MISHIMA NOBUYOSHI
IPC分类号： F01K23/06 , F01K23/10 , F02C3/26
摘要： PROBLEM TO BE SOLVED: To reduce in-plant power at the stoppage and to improve reliability at the stoppage by providing a means for stopping steaming of condensate at an outlet of a low temperature waste heat recovery heat exchanger and steaming of feed water at an outlet of a high temperature waste heat recovery heat exchanger at the normal plant stopping and emergency stopping. SOLUTION: A high temperature gas discharge pipe 29 having a high temperature gas discharge valve 30 is connected between a high temperature gas pipe 25 at the upstream of a gas turbine inlet valve 26 and a gas turbine outlet pipe 28. By a control device 33 for inputting a signals of a pressure detector 31 a temperature sensor 32 and the like of a pressure fluidized bed boiler pressure vessel 5, at the normal plant stopping, fuel inside a pressure fluidized bed boiler 6 is burned, thereafter an air compressor outlet valve 23 and the gas turbine inlet valve 26 are fully closed, an air supply valve 27 is opened, to isolate a boiler 6 side. Next, the high temperature gas discharge valve 30 is opened, and the high temperature gas is discharged to reduce pressure on the boiler 6 side. Operation of a gas turbine 2 is stopped after completion of pressure reduction of the boiler 6.

8. 发明专利

JPH109512A REVERSE FLOW PREVENTIVE DEVICE IN STARTING GAS TURBINE IN PRESSURIZED FLUIDIZED BED COMBUSTION DEVICE 失效
公开(公告)号：JPH109512A
公开(公告)日：1998-01-16
申请号：JP16315696
申请日：1996-06-24
申请人： BABCOCK HITACHI KK , HITACHI LTD
发明人： OSHIMA SHIGENOBU , MISHIMA NOBUYOSHI
IPC分类号： F02C3/28 , F02C9/40 , F23C10/16 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To prevent the reverse flow of the hot gas from a gas turbine to a boiler side when the gas turbine is started. SOLUTION: A device to drive a gas turbine 7 by the exhaust gas from a pressurized fluidized bed combustion device is provided with a pressure boosting fan 9 to feed the pressurized air to a pressure vessel 10 of the pressurized fluidized bed combustion device, a hot gas stop valve 6 provided between a combustor to be ignited when the gas turbine 7 is started and the pressurized fluidized bed combustion device, and a gas turbine bypass piping 17 to connect the pressurized fluidized bed combustion device side of the hot gas stop valve 6 to an outlet of the gas turbine. By operating the pressure boosting fan 9 and the gas turbine bypass piping 17 when the gas turbine is started, the hot gas leaking from the hot gas stop valve 6 is prevented from reversely flowing to the pressurized fluidized bed combustion device side.

9. 发明专利

JPS63223311A CHATTERING PREVENTING SYSTEM FOR CHECK VALVE 失效
公开(公告)号：JPS63223311A
公开(公告)日：1988-09-16
申请号：JP5404387
申请日：1987-03-11
申请人： HITACHI LTD
发明人： MISHIMA NOBUYOSHI
IPC分类号： F01K7/38 , F01D25/00 , F16K15/03
摘要： PURPOSE:To prevent failure due to the chattering of a check valve in a system composed of the check valve, a stop valve and piping by additionally providing a system for bypassing the check valve and the stop valve to avoid the operation of the check valve in its chattering occurrence range. CONSTITUTION:Steam flowing through a turbine 6 is partially introduced through an extraction stop valve 4 and an extraction check valve 3 provided on an extraction steam pipe 5 into a feed water heater 7. The above-mentioned piping system is provided with a small bypass valve 1 and bypass piping 2 to bypass the extraction stop valve 4 and the extraction check valve 3. When a steam flow rate is small on condition that a load is below a certain low load exceeding a chattering one, and the extraction pressure of a turbine 6 is higher than an internal pressure in the feed water heater 7, the extraction stop valve 4 is fully closed, and the small bypass valve 1 is fully opened. The opening and closing moments of the extraction check valve 3 can be therefore balanced respectively to avoid operation of the extraction check valve in its chattering occurrence range.

10. 发明专利

JP2013217588A Method of drying low grade coal and thermal power plant using low grade coal as fuel 审中-公开
标题翻译：使用低等级煤炭燃料干燥低等级煤和热力发电厂的方法
公开(公告)号：JP2013217588A
公开(公告)日：2013-10-24
申请号：JP2012088990
申请日：2012-04-10
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MISHIMA NOBUYOSHI , SUGIURA TAKASHI , SAKAKURA TAKAHIKO
IPC分类号： F26B23/00 , C10L9/08 , F23K1/00 , F23K1/04 , F26B17/32
CPC分类号： Y02P70/405
摘要： PROBLEM TO BE SOLVED: To provide a method of drying low grade coal which suppresses reduction of output and efficiency of a thermal power plant, reduces problems such as sulphate corrosion, and can dry low grade coal, when the low grade coal such as brown coal is dried and used as fuel for the thermal power plant, and to provide the thermal power plant using the low grade coal as fuel.SOLUTION: A portion of a boiler exhaust gas at a desulfurization equipment outlet is extracted, the boiler exhaust gas is heated using solar heat energy, and the heated boiler exhaust gas at high temperature is used to directly heat and dry low grade coal such as brown coal. For instance, a boiler exhaust gas at an outlet of the desulfurization equipment 46 is pressure-increased by a dry gas pressure-increasing fan 51, the resultant is fed to a solar heat collecting apparatus 54, the boiler exhaust gas heated by the solar heat collecting apparatus 54 is supplied to a brown coal drying apparatus 23 to dry brown coal, the dried brown coal is supplied via a brown coal mill 25 to a boiler 1, and is burned therein.
摘要翻译：要解决的问题：提供一种干燥低品位煤的方法，抑制火电厂的产出和效率的降低，减少硫酸盐腐蚀等问题，并可以干燥低品位煤，当低等级煤如褐煤被干燥并用作火力发电厂的燃料，并提供使用低等级煤作为燃料的火力发电厂。解决方案：一部分脱硫设备出口处的锅炉废气被抽出，锅炉废气被加热使用太阳能热能，高温锅炉废气用于直接加热和干燥褐煤等低品位煤炭。例如，脱硫装置46的出口处的锅炉废气由干燥气体增压风扇51增压，将其输送到太阳能集热装置54，由太阳能热量加热的锅炉排气收集装置54被供应到褐煤干燥装置23以干燥褐煤，干棕色煤通过褐煤磨机25供应到锅炉1，并在其中燃烧。

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