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1. 发明专利

JP2003222301A OPERATION CONTROL METHOD AND SYSTEM OF PROCESS STEAM GENERATION EQUIPMENT FOR INDUSTRY 审中-公开
公开(公告)号：JP2003222301A
公开(公告)日：2003-08-08
申请号：JP2002023229
申请日：2002-01-31
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： AMANO HAJIME , MAO TAKASHI , SATO SHUJI
IPC分类号： F02G5/02 , F02G5/04 , F22B1/18 , F22B35/00
摘要： PROBLEM TO BE SOLVED: To solve such a problem that in equipment in which a plurality of devices are installed having a motor, power generator, an exhaust heat recovery boiler for exhaust heat of the motor and a fuel fired boiler, control has been made with emphasis on generated power and has not been necessarily efficient and economical in view of the generated steam volume in the number of operating units and the demand and supply balance of steam, and to provide an operating system and a system of process steam generation equipment with efficient operation. SOLUTION: Steam generation efficiency of a first steam generation equipment and a second steam generation equipment are calculated, operating priority is determined from the higher of the calculated steam generation efficiency for the increase of steam demand of a process for supplying steam, while the operating priority is determined from the lower of the calculated steam generation efficiency for the decrease of the steam demand of the process, and operation is made sequentially according to the order of the determined operating priority so as to supply steam to the process. COPYRIGHT: (C)2003,JPO

2. 发明专利

JPH1073207A PRESSURIZED FLUIDIZED BED PLANT AND OPERATION OF SAME 失效
公开(公告)号：JPH1073207A
公开(公告)日：1998-03-17
申请号：JP19539697
申请日：1997-07-22
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SASAKI TOSHIHIKO , SUZUMURA TAKESHI , MAO TAKASHI , SATO KANZO , HASA SUMIHITO
IPC分类号： F01K23/10 , F01K23/06 , F02C3/28 , F02C6/10 , F02C7/057 , F23C10/16 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To improve operation characteristics during the change of load of a plant by discharging the air or gas of an air and gas system to other system during the change of load or bypassing the air or gas in the air and gas system. SOLUTION: A pipeline by which the discharge side of an air compressor 1 is connected to the exhaust part of a gas turbine 2 and an extracted air flow control valve 41 on this pipeline are provided, so that a part of compressed air is not supplied to a pressurized fluid bed boiler 14 by releasing the extracted air flow control valve 41 during the fall of load. The opening degree of the extracted air flow control valve 41 is controlled according to a load request signal commanded by the pressurized fluid bed plant. When the load is lowered, the change characteristics of the transient flow rate and pressure of a compressed air supply system are previously obtained, and the extracted air flow rate of the air compressor 1 is precendently controlled depending on the rate of change during the fall of load. Thus, the delay of the pressure and flow rate of the compressed air supply system relative to the flow rate of the discharge air of the air compressor 1 can be set to a value within a prescribed range.

3. 发明专利

JP2002053874A APPARATUS FOR PRODUCING GAS FUEL AND METHOD FOR OPERATING THE SAME 失效
公开(公告)号：JP2002053874A
公开(公告)日：2002-02-19
申请号：JP2000244004
申请日：2000-08-07
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHIMARU HITOSHI , MAO TAKASHI , UTAMURA MOTOAKI , KOYAMA KAZUHITO , MITSUI YOSHIO
IPC分类号： C08J11/10 , C10J3/00 , C10J3/02 , C10J3/20
摘要： PROBLEM TO BE SOLVED: To efficiently convert a carbon component contained in a waste into a gas fuel containing hydrogen. SOLUTION: A carbon resource which is the waste is fed into a blast furnace 1 and the carbon resource is gasified in the blast furnace 1 in a high-temperature state. Superheated steam produced in a gasifying reformer 2 and oxygen are fed into the blast furnace 1. The gas produced from the carbon resource is reformed into the gas fuel containing the hydrogen, carbon monoxide or a hydrocarbon by actions of the superheated steam and oxygen. The gas fuel is burned with a recycled gasified fuel combustion boiler 3 to heat a condensate fed to the recycled gasified fuel combustion boiler 3 and generate steam which is utilized in a steam utilizing apparatus 6. Thereby, the gas fuel can efficiently be produced from the unutilized carbon resource and the apparatus is capable of contributing to a resource recycling type economic society.

4. 发明专利

JPH07109905A METHOD AND APPARATUS FOR CONTROLLING STEAM TEMPERATURE IN COMPOSITE POWER GENERATION PLANT 失效
公开(公告)号：JPH07109905A
公开(公告)日：1995-04-25
申请号：JP25564793
申请日：1993-10-13
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MAO TAKASHI , SHIMANE YASUSHI , MATSUMURA JUBE , AKIYAMA KOSEI
IPC分类号： F01K23/10 , F22B1/18 , F22G5/12
摘要： PURPOSE:To provide a steam temperature controlling technique for a composite power generation plant which can control the steam temperature to a same constant value as a rated point in the partial load running without pouring in spray water. CONSTITUTION:The deviation of a actual steam received heat amount calculated from a set value 89 of steam side heat receiving energy corresponding to loads required by steam using facilities 30, 32 and the detecting value of steam temperature Ts in an exhaust heat recovering boiler 11 is calculated, and at least one of fuel flow and compressor passing air flow for satisfying a limiting condition for cancelling the deviation and fixing burning temperature Texh and steam temperature Ts from a rated point to partial load is calculated. At least one of the openings of a fuel flow adjusting valve 6 of a gas turbine 1 and the opening of a compressor inlet guide blade 4 is controlled according to the calculated value.

5. 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.

6. 发明专利

JPH1047014A HIGH TEMPERATURE COOLING WATER SYSTEM 失效
公开(公告)号：JPH1047014A
公开(公告)日：1998-02-17
申请号：JP20462196
申请日：1996-08-02
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YOSHINARI YUKIMASA , UENO TAKESHI , MAO TAKASHI , TSUCHIDA SHINICHIRO
IPC分类号： F01K9/00 , F22B1/02
摘要： PROBLEM TO BE SOLVED: To improve reliability and thermal efficiency by a method wherein, in a pressure fluidized bed composition generating plant, high temperature cooling water necessary for prevention of the occurrence of acid dew point corrosion and ash fixing is always ensured and stably fed. SOLUTION: Feed water in a deaerator 19 is fed to a high temperature cooling water tank 26 through a high temperature cooling water tank water level regulating valve 25. After the feed water is boosted by a high temperature cooling water pump 27 and heat-exchanged (or heated) by a filter ash cooler 12, it is returned to the high temperature cooling water tank 26 through a pressure regulation valve 28. Quantities of exchange heat of various coolers 10, 11, and 12 are flashed in the tank 26 and recovered to a low pressure feed water heater 18 through a pressure regulation valve 29. During the stop of starting, feed water is fed from a steam generating device 22 to a deaerator 19 through a deaerator pressure regulating valve 23 to produce high temperature cooling water, from which a necessary temperature is ensured. Thereby, the high temperature cooling water is necessary to prevention of acid dew point corrosion and high temperature cooling water for cooling ash in exhaust gas and heating an apparatus is stably fed and heat is recovered in a cycle.

7. 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.

8. 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.

9. 发明专利

JPH05332102A PRESSURE FLUIDIZED BED BOILER POWER PLANT 失效
公开(公告)号：JPH05332102A
公开(公告)日：1993-12-14
申请号：JP13948892
申请日：1992-05-29
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SATO KANZO , SUGITA NARIHISA , SUZUMURA TAKESHI , SASAKI TOSHIHIKO , MAO TAKASHI
IPC分类号： F01K13/02 , F01K23/06 , F01K23/10
摘要： PURPOSE:To protect a boiler and to safely stop it by way of restraining pressure difference between a pressure vessel and a furnace within an allowable range at the time of emergency at a pressure fluidized bed (PFBC) boiler power plant. CONSTITUTION:A combustion air adjustment system connected to a pressure vessel 5 and furnished with a combustion air amount adjustment valve 120 and a combustion gas by-pass adjustment system furnished with a combustion gas amount adjustment valve 130 to by-pass combustion gas of a furnace 6 are provided. At the time of emergency, combustion air is flowed to the combustion air adjustment system, and simultaneously, combustion gas in the furnace 6 is flowed to the combustion gas by-pass system. Consequently, at the time of emergency, it comes to be possible to maintain pressure difference between the pressure vessel 5 and the furnace 6 within an allowable range and simultaneously to restrain generation of overspeed of a gas turbine minimum.

10. 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.

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