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1. 发明专利

JPH1144410A PRESSURIZED FLUIDIZED-BED COMPOSITE GENERATING SYSTEM AND METHOD AND APPARATUS FOR CONTROLLING IT 失效
公开(公告)号：JPH1144410A
公开(公告)日：1999-02-16
申请号：JP19806297
申请日：1997-07-24
申请人： HITACHI LTD , BABCOCK HITACHI KK , CHUGOKU ELECTRIC POWER
发明人： HOKARI NOBUYUKI , SATO YOSHIO , MIYAMOTO TOMOHIKO , HOTTA NOBUHIRO , TOYAMA EIJI , YAMAMOTO YASUISA , YOSHIMOTO SATOSHI , KIMURA KOJI
IPC分类号： F01K23/10 , F22B1/02 , F23C10/16 , F23C10/28 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To operate a fuel amount even according to a layer temperature with relativeness between a system for operating the fuel amount based on steam temperature and a system for operating a layer height based on the layer temperature. SOLUTION: The method for controlling a pressurized fluidized-bed composite generating system comprises the steps of generating a fuel amount target value 108 based on a fuel amount set value 106 generated from a functional generator 74, generating a fuel amount command value 110 according to the value 108, operating a coal charging amount in a fuel supply line according to the value 110, and correcting the operating amount according to an output from a controller 72 so that a deviation of the actual steam temperature from the set value becomes zero. Further, the method comprises the steps of correcting a layer height set value generated from a functional generator 96 in response to a deviation of the actual layer temperature from a set value by an adder 94, and operating the layer height based on the corrected layer height command value 116. And, the method also comprises the steps of outputting a signal responsive to a deviation of the actual layer temperature from the set value from a controller 86 to an adder 78 in response to a switching signal 113 from a condition deciding unit 90 to correct the value 110.

2. 发明专利

JPH1182992A CLOGGING PREVENTION METHOD OF FUEL FEED NOZZLE IN EMERGENCY SHUTDOWN OF FLUIDIZED BED BOILER, AND FUEL FEED NOZZLE 失效
公开(公告)号：JPH1182992A
公开(公告)日：1999-03-26
申请号：JP24086497
申请日：1997-09-05
申请人： HITACHI LTD , CHUGOKU ELECTRIC POWER , BABCOCK HITACHI KK
发明人： MIYAMOTO TOMOHIKO , MIZUMOTO MAMORU , YOSHII YASUO , ITO OSAMU , TOMURO JINICHI , ORITA HISAYUKI , YAMAZAKI TAKAKIMI , HISAMITSU MAKOTO
IPC分类号： F23C10/28 , F23C10/18 , F23C10/22 , F23K3/00 , F23K5/18 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To prevent a fuel feed nozzle from being closed due to sticking of fuel, by closing the tip hole of the fuel feed nozzle, and by washing the nozzle to discharge the residue at the time of emergency shutdown of a fluidized bed boiler. SOLUTION: A fuel feed nozzle 6 feeds the mixed fuel (in a paste form) of solid fuel and liquid to a fluidized bed together with air from the tip hole 21 of the nozzle. The tip hole 21 of the nozzle is provided with a closure mechanism which prevents the mixed fuel from sticking due to the entry of the heat into the fluidized bed 4 at the time of emergency shutdown of the operation of the fluidized bed 4. This mechanism allows the tip hole 21 of the nozzle to be closed by a bar 15 which is movably pushed through, and a plug 20 which is provided at the tip. Moreover, the mechanism, which discharges the mixed fuel outside the system, is attached to the feed nozzle 6. The mechanism which discharges the mixed fuel outside the system is to discharge it to CWP (the fuel in the form of paste) tank 18 outside the system, for example, by the pressurized water which is injected into the first space 22 by a water pipe 12 via valve V12.

3. 发明专利

JPH1147640A CYCLONE SYSTEM 失效
公开(公告)号：JPH1147640A
公开(公告)日：1999-02-23
申请号：JP21279397
申请日：1997-08-07
申请人： HITACHI LTD , CHUGOKU ELECTRIC POWER , BABCOCK HITACHI KK
发明人： OKAZAKI TERUYUKI , KAWABE RYUHEI , MIYAMOTO TOMOHIKO , ORITA HISAYUKI , IKEUCHI KAZUO , KURAMOTO MASAHARU , ITO SADAO
IPC分类号： B01D45/12 , B04C5/181
摘要： PROBLEM TO BE SOLVED: To enable blow down by using a pressure difference in a system by disposing a structure in which an outer diameter is set to specified times of an inner diameter of a waste gas inner cylinder at a lower part of a solid removing device arranged in a pressure vessel and connecting a solid particle removing part of the pressure vessel and outlet piping with piping. SOLUTION: A combustion gas generated in a pressure fluidized bed combustion device where a fluidized bed combustion of coal is executed is introduced to a cyclone 3 as the solid removing device through connecting piping 2. Relating to the cyclone 3, dust is separated by centrifugal force during a fluidization allowing to fall while revolving and a purified gas is discharged from the waste gas inner cylinder 7. At this time, a part of the gas in a dust hopper is introduced to a gas turbin 10 by bleeding by the blow down through the blow-down piping 9 connecting the dust hopper and the outlet piping 8. The structure having the diameter of 0.65 times of the inner diameter of the waste gas inner cylinder 7 of the cyclone 3 is disposed in a dust banker of the cyclone 3 to prevent a reversed inflow of the waste gas.

4. 发明专利

JPH1163420A PRESSURIZED FLUIDIZED BED BOILER AND ITS OPERATION METHOD 失效
公开(公告)号：JPH1163420A
公开(公告)日：1999-03-05
申请号：JP21279497
申请日：1997-08-07
申请人： HITACHI LTD , CHUGOKU ELECTRIC POWER , BABCOCK HITACHI KK
发明人： MIZUMOTO MAMORU , YOSHII YASUO , INADA TORU , MIYAMOTO TOMOHIKO , SATO YOSHIO , NISHIMURA SADAO , SAMEJIMA SATORU
IPC分类号： F23C10/28 , F23C10/16 , F23C10/24 , F27B15/00 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To prevent the stopping of a furnace by the growth of aggregate from fluid medium by arranging equipment classifying fluid medium between a fluidized bed furnace and fluid medium storing equipment, or providing the equipment in fluid medium storing equipment. SOLUTION: The quantity of the fluid medium equivalent to the fluid medium inside the furnace is transported from an evacuating pipe line of the fluid medium at the bottom part of a fluidized bed furnace through a transport pipe line 94 to storing equipment 95 provided with the equipment classifying the fluid medium. An inclined screen 51 is arranged to the inside of the storing equipment 95 and the transported fluid medium inside the storing equipment 95 is flowed down on the inclined screen 51. Smaller particles in the fluid medium are dropped to the bottom part of a container 95A though the meshes of the inclined screen 51 while the particles are flowed down. The particles of the size that cannot pass the meshes of the inclined screen 51 flow down on the inclined screen 51 without dropping and are taken out to the outside of the circulating path of the fluid medium through the discharging pipe line 97 of the coarse particles.

5. 发明专利

JPH10263439A MULTICYCLONE 失效
公开(公告)号：JPH10263439A
公开(公告)日：1998-10-06
申请号：JP7551997
申请日：1997-03-27
申请人： HITACHI LTD , BABCOCK HITACHI KK , CHUGOKU ELECTRIC POWER
发明人： OKAZAKI TERUYUKI , KAWABE RYUHEI , MIYAMOTO TOMOHIKO , ORITA HISAYUKI , KURAMOTO MASAHARU , IKEUCHI KAZUO , ITO SADAO , TOKUSHIGE KOUJI
IPC分类号： B04C5/28
摘要： PROBLEM TO BE SOLVED: To prevent decrease of the flow rate in upper parts in cyclone inlet pipes by widening the diameter of an introducing pipe wider on upstream side than that in the pipe terminal from which the cyclone inlet pipes are branched and making the upper faces of the inlet parts of the cyclone inlet pipes be inclined faces as to taper the inlet pipes toward cyclones. SOLUTION: This multicyclone is provided with one introducing pipe 1 to introduce a power dust gas vertically downward, a plurality of cyclone inlet pipes 2 branched radiately from the pipe terminal of the introducing pipe 1, and cyclones 3 connected with the cyclone inlet pipes 2, respectively, in the same number as that of the cyclone inlet pipes 2. The powder dust gas flowing through the introducing pipe 1 is introduced into the cyclones 3 through the cyclone inlet pipes 2 and the powder dust is separated by centrifugal separation in the cyclones 3. The diameter of the introducing pie 1 is widened more on the upstream side to the pipe terminal from which the cyclone inlet pies 2 are branched. The upper faces of the inlet parts of the cyclone inlet pies 2 are made to be inclined faces as to taper the cyclone inlet pipes 2 toward the cyclones 3.

6. 发明专利

JPH10249242A CYCLONE SYSTEM FOR SEPARATING SOLID COMPONENT IN GAS 失效
公开(公告)号：JPH10249242A
公开(公告)日：1998-09-22
申请号：JP5754797
申请日：1997-03-12
申请人： HITACHI LTD , BABCOCK HITACHI KK , CHUGOKU ELECTRIC POWER
发明人： MIYAMOTO TOMOHIKO , ORITA HISAYUKI , INADA TORU , KAWABE RYUHEI , OKAZAKI TERUYUKI , IKEUCHI KAZUO , KURAMOTO MASAHARU , NISHIMURA SADAO , HIRANE MASAMI
IPC分类号： F02C3/28 , B04C5/13 , B04C5/24 , F23C10/16 , F23J15/00 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To provide a cyclon system capable of enhancing the recovery efficiency of gas. SOLUTION: The second stage cyclones 60-1, 60-n are subjected to cascade connection on the outlet side of the first stage cyclones 30-1, 30-n. A solid component of gas flowing in from inlets 32-1, 30-n, 60-1, 60-n is separated by centrifugal force to be jetted from leg parts 36-1, 36-n, 66-1, 66-n and the gas from which the solid component is removed is taken out of inner cylinders 34-1, 34-n, 64-1, 64-n. The first stage small cyclone 100 introduces the gas jetted from the leg part side of the first stage cyclone from its inlet 102 and the gas from which the solid component is removed is taken out on the side of the inner cylinder 104 to be allowed to meet with the gas taken out on the inner cylinder side of the first stage cyclone to be recovered. The second stage small cyclone 120 is also same. The leg diameter of the cyclones 30-1, 30-n, 60-1, 60-n is made larger than the diameter of the inner cylinder to make the outlet pressure of the leg positive with respect to that of the inner cylinder to the cyclone.

7. 发明专利

JPH11148608A PRESSURIZED FLUIDIZED BED COMBINED POWER GENERATION SYSTEM AND ITS CONTROL METHOD 失效
公开(公告)号：JPH11148608A
公开(公告)日：1999-06-02
申请号：JP31476497
申请日：1997-11-17
申请人： HITACHI LTD , CHUGOKU ELECTRIC POWER , BABCOCK HITACHI KK
发明人： HOKARI NOBUYUKI , SATO YOSHIO , MIYAMOTO TOMOHIKO , TOYAMA EIJI , YAMAMOTO YASUISA , TOKURA SUMIO , YOSHIMOTO SATOSHI
IPC分类号： F02C3/28 , F23C10/16 , F23C10/28 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To reduce a layer height operation amount per one time when a temperature change amount after the layer height operation exceeds a previously set maximum allowable change amount. SOLUTION: A title method comprises the steps of: recording in a layer temperature change recording device 17 a change in elapsed time of a layer temperature measured value, the layer temperature being measured by a layer temperature measuring unit 3, estimating with a subtractor 19 a temperature change amount between a layer temperature measured value upon starting the layer height operation and a minimum layer temperature measured value within a predetermined time after the layer height operation; calculating with a subtractor 20 that the temperature change amount exceeds a previously set maximum allowable change amount (temperature change set value); and altering a maximum or a minimum of a layer height deviation and correcting a layer height operation amount per one time with a hysteresis generator 13 to be smaller by altering a maximum or a minimum of a layer height deviation.

8. 发明专利

JPH10253012A FLUIDIZED-BED BOILER AND METHOD FOR ITS CONTROL 失效
公开(公告)号：JPH10253012A
公开(公告)日：1998-09-25
申请号：JP5902097
申请日：1997-03-13
申请人： HITACHI LTD , BABCOCK HITACHI KK , CHUGOKU ELECTRIC POWER
发明人： YOSHII YASUO , MIYAMOTO TOMOHIKO , MIZUMOTO MAMORU , TOMURO JINICHI , INADA TORU , OKI KATSUYA , YOSHIMITSU AKINORI , SAMEJIMA SATORU
IPC分类号： F23C10/00 , F22B1/02 , F23C10/28 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To reduce the quantity of sulfur oxide (SOX) evolved from solid hydrocarbon fuel. SOLUTION: Usually fiuidization medium 5 of relatively large particle diameter in a storage tank 26 is supplied to a fluidized-bed boiler 15, whereas when SOX concentration increases, fluidization medium 4 of fine particle diameter is supplied from a storage tank 27 to the fluidized-bed boiler 15 so as to reduce the quantity of SOX evolved. When the height of the fluidized bed 6 exceeds the target value, the fluidization medium is drawn off from a fluidization medium-bleeding pipe 3 so as to maintain the height. This constitution enables suppressing SOX concentration to a low level.

9. 发明专利

JPH10300020A POWER GENERATION SYSTEM 失效
公开(公告)号：JPH10300020A
公开(公告)日：1998-11-13
申请号：JP10952397
申请日：1997-04-25
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： ORITA HISAYUKI , MIYAMOTO TOMOHIKO , KAWABE RYUHEI , OKAZAKI TERUYUKI , KURAMOTO MASAHARU , TAKAHASHI KOJI
IPC分类号： F23C10/28 , F23C10/24 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To improve dust removing performance for a combustion gas in a power generation system utilizing the combustion gas. SOLUTION: A fuel (CWP) in which coal and limestone are mixed and kneaded to be pasted is supplied to a boiler 4 from a QWP supply line 1 and the limestone as fluidizing medium is supplied from a limestone supply line 2. From ash discharged together with a combustion gas from the boiler 4, coarse grain ash is trapped by a cyclone 5 at the first stage and is cooled by a cooler 6 to be stored into a hopper 8. On the other hand, the gas cleared of the dust with the cyclone 5 is introduced to a dust remover at the rear stage from a line 11 to remove fine grain ash. The coarse grain ash stored in the hopper 8 is transferred to a pressure vessel 12 and a valve 13 is opened to supply the coarse grain ash to the boiler with an ejector 14. A differential pressure P1 is measured between a static pressure at a position near the boiler of a conveying line 27 and a static pressure of a backwash of the ejector and a differential pressure P, between a static pressure of the backwash of the ejector and the internal pressure of the pressure vessel 12 is measured to automatically control the flow rate of a drive fluid of the ejector 14 and the amount of the gas for pressurizing the pressure vessel based on the differential pressures P1 and P2 .

10. 发明专利

JPH10238713A PRESSURIZED FLUIDIZED BED BOILER AND ITS OPERATING METHOD 失效
公开(公告)号：JPH10238713A
公开(公告)日：1998-09-08
申请号：JP4057697
申请日：1997-02-25
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： MIZUMOTO MAMORU , YOSHII YASUO , INADA TORU , MIYAMOTO TOMOHIKO , TOMURO JINICHI
IPC分类号： F23C10/00 , F23C10/16 , F23C10/28 , F23C99/00 , F23C11/02 , F23C11/00
摘要： PROBLEM TO BE SOLVED: To provide a pressurized fluidized bed boiler and the operating method thereof, which are capable of restoring the desulfurizing performance of desulfurizing agent with a low running cost without increasing the leakage density of SOx. SOLUTION: In a pressurized fluidized bed boiler, provided with system for sending fluidizing medium, extracted out of a fluidized bed furnace 11, into fluidizing medium storage facility 95 in accordance with the change of load, and another system for supplying the fluidizing medium from the fluidizing medium storage facility 95 into the fluidized bed furnace 11, a facility, permitting an operation, in which the circulating direction of medium, flowing in the system, into a direction reversed from the same upon load adjusting, is provided in the systems.

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