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1. 发明专利

JPH04278101A EXHAUST HEAT RECOVERY BOILER 失效
公开(公告)号：JPH04278101A
公开(公告)日：1992-10-02
申请号：JP6378991
申请日：1991-03-06
申请人： BABCOCK HITACHI KK
发明人： SHIGENAKA TOSHINORI , FURUBAYASHI HAJIME , MIMURA TETSUO , SAKAMOTO KIMIYA
IPC分类号： F22B1/18 , F22B37/00
摘要： PURPOSE:To mitigate an abnormal rise of the steam pressure in a low pressure drum which is generated in the hot banking of an exhaust heat recovery boiler. CONSTITUTION:A condenser drain piping 26 and a drain tank drain piping 28 are provided between a condenser 26 and drain tank 27 from a low pressure main steam pipe 14, and one of a condenser drain valve and a drain tank drain valve 30 is opened or closed based on the difference between the pressure detection signal 32 and the pressure setting signal 34 from a pressure detection device 31 to make the steam from a low pressure drum 5 escape to the condenser 24 and drain tank 27.

2. 发明专利

JP2001355806A CONTROLLER FOR WASTE HEAT RECOVERY STEAM GENERATOR 失效
公开(公告)号：JP2001355806A
公开(公告)日：2001-12-26
申请号：JP2000177302
申请日：2000-06-13
申请人： BABCOCK HITACHI KK
发明人： FURUBAYASHI HAJIME
IPC分类号： F22B1/18 , F22D5/26 , F22D5/34
摘要： PROBLEM TO BE SOLVED: To provide a controller for waste heat recovery steam generator which can prevent the occurrence of cavitation in a high-pressure feed water pump which occurs when the flow rate of hot water in a high-pressure economizer-size pipeline increases due to the load change, etc., of a heat source. SOLUTION: When the valve travel control value (proportionally integrated value PI2) of a recirculating flow rate control valve outputted from a proportional integrator 23 becomes larger due to the valve travel control of the valve based on the temperature T of feed water in the pipeline at the inlet of a low-pressure economizer, the valve travel of the valve is limited so that the suction flow rate of the high-pressure water pump and the flow rate ir of hot water in the recirculation pipeline of a high-pressure economizer may respectively become the suction flow rate limiting value ils of the high-pressure feed water pump outputted from a signal generator 17 and a recirculating flow rate limiting valve ilr outputted from another signal generator 17 or smaller by finding the difference between the smaller one of the difference between the flow rate ih of hot water in the high-pressure economizer-side pipeline and the suction flow rate limiting valve ils and the recirculating flow rate limiting valve outputted from the signal generator 17 and the flow rate ir of the hot water in the recirculating pipeline of the economizer and limiting the valve travel to the valve travel limiting value Rg corresponding to the proportionally integrated value of the difference.

3. 发明专利

JP2000146108A WASTE HEAT RECOVERY BOILER AND CONTROL METHOD THEREOF 失效
公开(公告)号：JP2000146108A
公开(公告)日：2000-05-26
申请号：JP31565298
申请日：1998-11-06
申请人： BABCOCK HITACHI KK
发明人： FURUBAYASHI HAJIME
IPC分类号： F22B1/18 , F22D5/00
摘要： PROBLEM TO BE SOLVED: To prevent overloading of a feed water pump by suppressing a sharp increase in the flow rate of feed water by causing a phenomenon of sudden drop in the water level of a steam drum or the like in a waste heat recovery boiler. SOLUTION: In case a heat source of a heat source generator such as gas turbine is shut out by a trouble or the like, a set value of a water level of a high pressure steam drum 11 is lowered to limit the flow rate of feed water to be supplied to the high pressure steam drum 11, whereby overloading of a high pressure feed water pump 7 for supplying the feed water is prevented to enable the stable operation of a waste heat recovery boiler. In case the heat source such as gas turbine is shut out, a set value of a stream drum level is switched over to a value lower than the actual drum level. As a result, a feed water flow control valve 9 of high pressure water to be supplied to the high pressure steam drum 11 will not be opened by a proportional and integration operation, and is controlled under the full closure unless the actual water level of the high pressure steam drum 11 is lowered below a level set value set lower. Thus, there is no increase in the flow rate of feed water free from any sudden drop in the steam drum level, thereby eliminating excessive flow rate in the discharge of the high pressure feed water pump.

4. 发明专利

JPH08238416A METHOD AND APPARATUS FOR CONTROLLING INJECTION OF AMMONIA INTO DENITRATION APPARATUS 失效
公开(公告)号：JPH08238416A
公开(公告)日：1996-09-17
申请号：JP4463195
申请日：1995-03-03
申请人： BABCOCK HITACHI KK
发明人： FURUBAYASHI HAJIME
IPC分类号： B01D53/34 , B01D53/56 , B01D53/74 , B01D53/86 , B01D53/94
摘要： PURPOSE: To inject an appropriate amount of ammonia gas timely by calculating NOx concentration in a provisional inlet on the basis of the load of an apparatus discharging exhaust gas when the load of a combustion apparatus changes and correcting a calculated value by the detected value of the NOx concentration in an inlet when ammonia is injected into a denitration apparatus. CONSTITUTION: The total amount of NOx is calculated by multiplying the signal 7 of the flow rate of an exhaust gas injected into a denitration apparatus by the signal 25 of raw NOx concentration. The signal 11a of the preceding molar ratio of ammonia to exhaust gas is obtained by a function generator 11 from the set value of NOx concentration in an outlet and NOx concentration in an inlet, and a corrected signal 14a of the molar ratio is obtained on the basis of the deviation of a detected value from the set value of NOx concentration in the outlet to help controlling the amount of injected ammonia. In this process, the provisional signal 24a of raw NOx concentration in the inlet of a denitration reactor is set by a function generator 24 on the basis of a signal from a fuel flow rate command apparatus 20, the signal of the raw NOx concentration is corrected by the deviation from the signal 25 of the raw NOx concentration, and an appropriate amount of ammonia is injected without being affected by the change in a load.

5. 发明专利

JP2008075996A Exhaust heat recovery boiler and its steam pressure control method 有权
标题翻译：排气热回收锅炉及其蒸汽压力控制方法
公开(公告)号：JP2008075996A
公开(公告)日：2008-04-03
申请号：JP2006257917
申请日：2006-09-22
申请人： Babcock Hitachi Kk , バブコック日立株式会社
发明人： FURUBAYASHI HAJIME
IPC分类号： F22B37/42 , F22B1/18
摘要： PROBLEM TO BE SOLVED: To provide an exhaust heat recovery boiler and its steam pressure control method capable of preventing an increase in low pressure side steam pressure, only by adjusting opening of a high pressure side steam blowoff valve, when the low pressure side steam pressure increases to a preset value or more.
SOLUTION: Steam pipes 15 and 16 are arranged for respectively supplying steam of acquired respective pressures to respective steam turbines via respective steam drums 13 and 4, by generating two or more of steam pressures generated by an exhaust heat recovery boiler. The blowoff valve 17 is arranged for blowing off the steam from the higher pressure side steam drum 13 to the atmosphere only in the corresponding turbine steam pipe 15. The opening of the blowoff valve 17 is adjusted so that the steam pressure from the steam drum 13 does not become the preset value or more. When the low pressure side steam pressure increases to a specific value or more, the pressure preset value of the high pressure side steam blowoff valve 17 is reduced in response to its pressure increase quantity, and a high pressure side steam blowoff quantity is increased, and the opening of the blowoff valve 17 is adjusted so as to prevent an increase in the low pressure side steam pressure.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种排气热回收锅炉及其蒸汽压力控制方法，其能够仅通过调节高压侧蒸汽排出阀的开度来防止低压侧蒸汽压力的增加，当低压侧蒸汽压力侧蒸汽压力增加到预设值以上。解决方案：蒸汽管15和16布置成通过产生由废热回收锅炉产生的两个或更多个蒸汽压力，通过相应的蒸汽鼓13和4分别将相应的压力的蒸汽提供给相应的蒸汽轮机。排气阀17被布置成仅在相应的涡轮蒸汽管15中将来自高压侧蒸汽鼓13的蒸汽吹送到大气。排气阀17的开口被调节为使得来自蒸汽鼓13的蒸汽压力不成为预设值或更多。当低压侧蒸汽压力增加到特定值以上时，高压侧蒸汽排出阀17的压力预设值随其压力增加量而减小，高压侧蒸汽吹出量增加，调节排气阀17的开度，以防止低压侧蒸汽压力的增加。版权所有（C）2008，JPO＆INPIT

6. 发明专利

JP2002130610A CONTROLLER FOR WATER-LEVEL OF BOILER DRUM 失效
公开(公告)号：JP2002130610A
公开(公告)日：2002-05-09
申请号：JP2000325875
申请日：2000-10-25
申请人： BABCOCK HITACHI KK
发明人： KISHIMOTO TAKASHI , FURUBAYASHI HAJIME , YOKOTA HAYATO
IPC分类号： F22B35/14 , F22D5/00 , F22D5/26
摘要： PROBLEM TO BE SOLVED: To provide a controller for water-level of a boiler drum, in which water-level control of a boiler drum can be continued automatically, irrespective of the length of shutdown time of a plant. SOLUTION: In order to spread the level-control range from a normal range A to a lower part B, detection positions are provided in the pipe from an existing downcomer 3 and the drum 1 to a run-out main valve 42. Detection pipes 63 and 64 are newly provided to detect a differential pressure between them with a differential-pressure oscillator 72. Thus, even if a water level goes over the lower control limit of the level control range A, the level control can be continued in the level control range B.

7. 发明专利

JPH06249402A METHOD OF PROTECTING WASTE HEAT RECOVERY BOILER 失效
公开(公告)号：JPH06249402A
公开(公告)日：1994-09-06
申请号：JP3497593
申请日：1993-02-24
申请人： BABCOCK HITACHI KK
发明人： FURUBAYASHI HAJIME , SHIGENAKA TOSHINORI
IPC分类号： F22B37/42
摘要： PURPOSE:To prevent water hammer phenomena occurring at the time of restarting a gas turbine in a waste heat recovery boiler. CONSTITUTION:The title waste heat recovery boiler discharges, out of the system, drain which has condensed in a main steam pipe by fully opening drain valves 14, 15 of the main steam pipe for a certain period of time while the residual pressure within the main steam pipe is high in the process of hot banking of the gas turbine.

8. 发明专利

JPS63294928A DEVICE FOR CONTROLLING WET EXHAUST GAS DESULFURIZER 失效
公开(公告)号：JPS63294928A
公开(公告)日：1988-12-01
申请号：JP12701887
申请日：1987-05-26
申请人： BABCOCK HITACHI KK
发明人： FURUBAYASHI HAJIME
IPC分类号： B01D53/50 , B01D53/34 , B01D53/77
摘要： PURPOSE:To obtain a high oxidation rate even when the load of a boiler is changed by providing a specified pipeline for supplying a liq. absorbent slurry to a circulating tank at the dust collecting part from a liq. absorbent slurry tank, and respectively furnishing a means capable of supplying the liq. absorbent slurry to the circulating tank at the dust collecting part from the pipeline and a means capable of supplying the liq. absorbent slurry to a circulating tank at the absorption part from the liq. absorbent slurry tank. CONSTITUTION:In the wet exhaust gas desulfurizer, an auxiliary supply pipe 20 for the liq. absorbent slurry, a liq. absorbent slurry flow control valve 3 at the dust collecting part for controlling the supply of the liq. absorbent slurry, and a liq. absorbent slurry flow rate detector 30 at the dust collecting part are provided. As a result, a fresh liq. absorbent can be supplied to the circulating tank 9 at the dust collecting part from a liq. absorbent tank 14. Accordingly, the pH of the liq. absorbent in the circulating tank at the dust collecting part is stabilized, and the oxidation rate is not lowered. In addition, the liq. absorbent slurry flow control valve 48 at the absorption part for supplying the liq. absorbent to a circulating tank 19 at the absorption part and a liq. absorbent slurry flow rate detector 45 at the absorption part are provided. Consequently, the supply of the liq. absorbent is controlled, and a specified desulfurization rate can be maintained.

9. 发明专利

JPH07158812A CONTROLLING METHOD FOR BOILER AND CONTROL DEVICE FOR BOILER 失效
公开(公告)号：JPH07158812A
公开(公告)日：1995-06-20
申请号：JP31083093
申请日：1993-12-10
申请人： BABCOCK HITACHI KK
发明人： FURUBAYASHI HAJIME
IPC分类号： F22B35/00 , F22D5/30
摘要： PURPOSE:To enable a low pressure steam drum to keep its stable level even if a high pressure steam drum of a boiler shows a reduced level. CONSTITUTION:There are provided a high pressure steam drum and a low pressure steam drum, wherein boiler water in the low pressure drum is removed and fed to the high pressure drum and then water is supplied to the low pressure drum through a low pressure feedwater adjusting valve 2. A signal of a boiler water level transmitter 11 of the low pressure drum and a signal of a level setting device 12 are compared with each other by a comparator 13 so as to get a first signal. A signal of a steam flow rate transmitter 16 taken out of the low pressure drum and a signal from a feedwater flow rate transmitter 17 outputted through both high and low pressure drums are added by an adding device 18, this value and a signal of the feedwater flow rate transmitter 15 for the low pressure drum are compared to each other by a subtractor 13 so as to get a second signal. The low pressure feedwater adjusting valve 2 is controlled in response to a signal in which this signal and the first signal are added by an adder 18.

10. 发明专利

JPS6342721A CONTROLLING DEVICE FOR INJECTION AMOUNT OF AMMONIA 失效
公开(公告)号：JPS6342721A
公开(公告)日：1988-02-23
申请号：JP18532686
申请日：1986-08-08
申请人： BABCOCK HITACHI KK
发明人： IZUTSU MINORU , FURUBAYASHI HAJIME
IPC分类号： B01D53/56 , B01D53/34 , B01D53/74 , B01D53/94
摘要： PURPOSE:To reduce the amount of NH3 to be leaked at a time for starting a boiler in case the temp. of exhaust gas is low by changing over a switching device to a start-up arithmetic unit calculating both the compensation signal of molar ratio and the correction signal of molar ratio based on the signal of NH3 concn. in an outlet and controlling the flow rate of NH3 to be necessitated. CONSTITUTION:At the time of starting a boiler, when the temp. of exhaust gas is low, the preset signal 43 of NH3 concn. in an outlet is converted to a precedence signal 46 of molar ratio, on the other hand, both a signal 41 of NH3 concn. at the outlet and the preset signal 43 are converted to a compensation signal 44 of molar ratio, and the precedence signal 46 of molar ratio is converted to a correction signal 48 of molar ratio. Both the correction signal 48 of molar ratio and a signal 19 of total NOX amount are multiplied in a multiplier 30 to obtain a signal 31 of flow rate of NH3 to be necessitated, the deviation between the signal 31 and a signal 33 of measured flow rate of NH3 is made to a control signal 35, and the flow rate of NH3 to be injected is controlled thereby. When the gas temp. of exhaust gas is increased and the deviation between a signal 25 of measured NOX concn. in the outlet and a signal 21 of NOX concn. in the outlet is made to zero, a switching device 38 is changed over to perform ordinary control for the flow rate of NH3.

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