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1. 发明专利

JPH08117553A METHOD AND DEVICE FOR CONTROLLING INJECTION AMOUNT OF AMMONIA OF DENITRATION APPARATUS 失效
公开(公告)号：JPH08117553A
公开(公告)日：1996-05-14
申请号：JP26280594
申请日：1994-10-26
申请人： BABCOCK HITACHI KK
发明人： HIRAGA HISANORI
IPC分类号： B01D53/34 , B01D53/56 , B01D53/74 , B01D53/86 , B01D53/94
摘要： PURPOSE: To suppress a momentary discharge amt. of NOx to a prescribed value or less while holding a time average discharge amt. of NOx to a prescribed value or less in the control of the injection amt. of NH3 of a denitration apparatus. CONSTITUTION: An NH3 injection amt. signal 14 is calculated on the basis of the flow rate 22 of exhaust gas to be treated, the NOx concn. at the inlet of a denitration apparatus, the NOx concn. 3a at the outlet thereof and an outlet NOx concn. set value 6a while an NH3 injection amt. correction signal 23a is calculated on the basis of the deviation of the moving average operation value 5a over a predetermined time of the outlet NOx concn. and the outlet NOx concn. set value 6a and an NH3 injection amt. setting signal 14a is calculated on the basis of both signals 14, 23a and an NH3 flow rate adjusting valve is controlled on the basis of the signal 14a and an actually measured NH3 injection amt. signal 4a.

2. 发明专利

JPH11141465A FEED WATER CONTROL DEVICE OF DRUM BOILER 失效
公开(公告)号：JPH11141465A
公开(公告)日：1999-05-25
申请号：JP30582797
申请日：1997-11-07
申请人： BABCOCK HITACHI KK
发明人： KUNIHIRO YUJI , HIRAGA HISANORI
IPC分类号： F04B49/10
摘要： PROBLEM TO BE SOLVED: To control a boiler feed flow rate to the limited flow rate of a boiler feed water pump or lower by determining the valve opening signal of a regulating valve, and controlling the regulating valve so that valve opening speed gradually gets close to zero as a boiler feed water signal gets close to a boiler limited flow rate. SOLUTION: A composed deviation signal consisting of a drum level signal 1, a feed water flow rate signal 2 and a main steam flow rate signal 3 is formed by an adder 8, and the opening instruction signal of a feed water flow rate regulating valve 15 is formed by a proportional integrator 9 on the basis of the composed deviation signal to control the feed water flow rate. A change ratio limiter 20 effective for only the valve opening increasing direction is set on the output side of the opening instruction signal from the proportional integrator 9, and the valve opening speed is controlled to a value formed by a function generator as the change ratio set signal from the feed water flow rate signal 2. Namely, the valve opening side operating speed is controlled so as to start to be gradually reduced when it is close to a boiler feed water pump limit value, and be zero at the pump flow rate limit value.

3. 发明专利

JPH11531A CONTROLLING DEVICE FOR INJECTION OF AMMONIA TO DENITRIFICATION REACTOR 失效
公开(公告)号：JPH11531A
公开(公告)日：1999-01-06
申请号：JP15684297
申请日：1997-06-13
申请人： BABCOCK HITACHI KK
发明人： NISHIMURA YUJI , HIRAGA HISANORI
IPC分类号： B01D53/56 , B01D53/74 , B01D53/94
摘要： PROBLEM TO BE SOLVED: To suppress the exit NOx concn. of a denitrification reactor to be a specified value or lower and to decrease the deviation from the setting point by detecting the changes in the air flow when the changes in the load reach prior to the rapid changes to the NOx concn. assumed after the changes in the load reach, and by increasing or decreasing to correct the injection amt. of NH3 . SOLUTION: An adding means 48 of NH3 injection amt. bias-corrects the injection amt. of NH3 (required NH3 flow signal 33) when a boiler load as the load changes by the load command 49. The correcting means 55 of the injection amt. of NH3 of a NH3 injection controlling device 7 increases or decreases to correct the necessary NH3 flow signal 33 outputted by the NH3 injection amt. calculating means 9 corresponding to the deviation calculated by a comparator 61 prior to rapid changes to the NOx concn. assumed after the changes in the boiler load reach. The comparator 61 calculates the deviation between the air flow demand 58 as the air demand amt. required when changes in the load reach and the air flow (real air flow) calculated from the load generated by a function generator 60 based on the load command 49.

4. 发明专利

JP2000199583A PIPING SUPPORT STRUCTURE 失效
公开(公告)号：JP2000199583A
公开(公告)日：2000-07-18
申请号：JP269999
申请日：1999-01-08
申请人： BABCOCK HITACHI KK
发明人： ENKO KANEHIRO , OGAUCHI TOSHIO , HIRAGA HISANORI
IPC分类号： F16L3/12
摘要： PROBLEM TO BE SOLVED: To cause rainwater to hardly penetrate through a gap part between a heat insulation external plate and a support member. SOLUTION: The fixing plate 12a of a support member 12 in an H-shape in cross section consisting of a parallel fixing plate 12a, a support plate 12c, and a coupling plate 12b intercoupling the fixed plate 12a and the support plate 12c is fixed at a fixing part 11 having a vertical surface by a nut 13, and the end face of the coupling plate 12b is inclined relative to the support plate 12c. The support plate 12c is positioned above the fixing plate 12a, a U-bolt 14 is fixed at the support plate 12c, a piping 15 in a vertical direction is mounted on the support 12c by a U-bolt 14, and a heat insulation material 16 is arranged at the periphery of the piping 15. A heat insulation external plate 17 is arranged at the outer peripheral part of the heat insulation material 16, and a gap between the heat insulation external plate 17 and the coupling plate 12b of the support member 12 is filled with a caulking material 18.

5. 发明专利

JPH05215321A STOVE BLOWER AND CLEANING METHOD OF HEATING SURFACE BY STOVE BLOWER 失效
公开(公告)号：JPH05215321A
公开(公告)日：1993-08-24
申请号：JP2020692
申请日：1992-02-05
申请人： BABCOCK HITACHI KK
发明人： HIRAGA HISANORI
IPC分类号： F23J3/00 , F28G1/16
摘要： PURPOSE:To reduce the abrasion of a heat-transfer tube by installing pressure throttling mechanisms to a medium supply tube and an inwall near the connecting section of an inner tube respectively and rotating the inner tube while being synchronized with an outer tube to the medium supply tube. CONSTITUTION:An inner-tube side pressure throttling mechanism 27 is mounted to an inner tube 14 and a steam supply-tube side pressure throttling mechanism 26 to a steam supply tube 29. When the inner-tube side pressure throttling mechanism 27 is turned with the revolution of the inner tube 14, the steam passing area of a steam path passing through both throttling mechanisms is changed. According to such operation, regions in the axial direction of heat-transfer tubes 23 can be cleaned, and abrasion by dust is reduced in crossing regions. Accordingly, the abrasion of the heat-transfer tubes by dust is diminished, and the surfaces of the heat-transfer tubes can be cleaned.

6. 发明专利

JPH07163836A METHOD AND DEVICE FOR CONTROLLING CONCENTRATION OF NITROGEN OXIDE AND FOR DENITRATION 失效
公开(公告)号：JPH07163836A
公开(公告)日：1995-06-27
申请号：JP31351893
申请日：1993-12-14
申请人： BABCOCK HITACHI KK
发明人： WATANABE KO , INATSUNE YOSHIROU , HIRAGA HISANORI , KORENAGA NORINAO
IPC分类号： B01D53/34 , B01D53/56 , B01D53/74 , B01D53/86 , B01D53/94
摘要： PURPOSE:To prevent a frequently occurring abnormal alarm of NOx concentration and to control NOx concentration of mean value per unit time after denitration reaction of gas to be treated at the value not exceeding the regulatory value. CONSTITUTION:An NOx concentration signal inputted to an alarm 7 corresponds to the transit means NOx concentration D of (y) minute (y

7. 发明专利

JPH0674440A CONTROLLER FOR MULTIFUEL COMBUSTION BURNER OF BOILER 失效
公开(公告)号：JPH0674440A
公开(公告)日：1994-03-15
申请号：JP22741592
申请日：1992-08-26
申请人： BABCOCK HITACHI KK
发明人： HIRAGA HISANORI
IPC分类号： F22B35/00 , F23D17/00 , F23N1/00 , F23N5/18
摘要： PURPOSE:To prevent damage to a burner and a furnace wall by burning and prevent decrease of the output of a boiler to an unnecessarily low output by a method wherein the maximum of the amount of fuel which can be fed is obtained on the basis of the difference between the heat input per unit burner and the allowable heat input of the burner and an amount of fuel based on the result is fed. CONSTITUTION:A signal 35 representing the maximum amount of coal which can be fed per unit burner is obtained by calculating from a signal 33 representing an allowable heat input of a burner and from a signal 34 representing a set calorific value of coal set by a setting means 11 of the calorific value of coal. By calculating from the signal 35 representing the maximum amount of coal which can be fed per unit burner and from a signal 39 representing a set number of burners given by a setting means 14 of the number of burners per unit mill a signal 36 representing the maximum amount of coal which can be fed per unit mill, which is obtained, is compared with a signal 37 representing an amount of coal supply to be demanded of a coal feeder and the lower value of the two is used as a signal 38 representing a command to the coal feeder for a supply of coal. As a result, the heat input per unit burner is kept from exceeding the limit.

8. 发明专利

JP2000161608A WATER SUPPLY CONTROL DEVICE FOR DRUM BOILER 失效
公开(公告)号：JP2000161608A
公开(公告)日：2000-06-16
申请号：JP33433998
申请日：1998-11-25
申请人： BABCOCK HITACHI KK
发明人： HIRAGA HISANORI
IPC分类号： F22D5/26
摘要： PROBLEM TO BE SOLVED: To ensure long service life of a water supply flow rate control valve without causing abnormal pressure rise of a coal saving apparatus, and achieve safe operation continuously at all times. SOLUTION: The present control device comprises a vapor drum, a water supply pump for supplying water to the vapor drum through a coal saving apparatus, a water supply flow rate control valve 11 interposed between the coal saving apparatus and the vapor drum for controlling a water supply flow rate, and a coal saving apparatus pressure control valve 26 provided on an inlet side of the coal saving apparatus for controlling a pressure difference between the coal saving apparatus and the vapor drum. In this case, it is detected at a monitor switch 12 that an opening signal of the water supply flow rate control valve is fully closed or it is detected that pressure of the coal saving apparatus rises abnormally compared with predetermined pressure. A minimum opening 29 is selected with the detection at the monitor switch 12 as an opening of the coal saving apparatus pressure control valve, and the water supply flow rate control valve 11 and the coal saving apparatus pressure control valve 26 are controlled to prevent the water supply flow rate control valve 11 and the coal saving apparatus pressure control valve 26 from being closed simultaneously, whereby the coal saving apparatus is prevented from being abnormarily raised in its pressure.

9. 发明专利

JPS58185407A Operation of tower for reducing gas containing sulfur oxides 失效
标题翻译：用于减少含有硫氧化物的气体的塔的操作
公开(公告)号：JPS58185407A
公开(公告)日：1983-10-29
申请号：JP6714982
申请日：1982-04-23
申请人： Babcock Hitachi Kk
发明人： HIRAGA HISANORI
IPC分类号： B01D53/50 , B01D53/34 , B01D53/81 , B01J19/00 , C01B17/04
摘要： PURPOSE: To carry out the reduction of a gas containing sulfur oxides with carbon packed in a reduction tower, in high efficiency, by measuring the temperature in the tower at plural points, and using the highest temperature as the tower temperature.
CONSTITUTION: A gas rich in SO
2 is supplied through the pipe 2 to the bottom of the reduction tower 1, made to contact with carbon to reduce SO
2 to S, and discharged from the system through the outlet pipe 4. The temperature in the reduction tower 1 is measured by plural thermometers placed at plural points, and the highest temperature is selected by the high-selector 11. The obtained highest temperature is compared with the target temperature given by the function generator 10 by the controller 12, and controlled by proportional and integral action. As a result, the target oxygen concentration is preset by the controller 13, the target air feed signal is transmitted, and the operation signal is transmitted from the controller 14 to the air flow control valve 7. The reduction of SO
2 can be carried out by this process in high conversion.
COPYRIGHT: (C)1983,JPO&Japio
摘要翻译：目的：通过在多个点测量塔中的温度，以最高的温度作为塔温度，以高效率，在还原塔中进行包含碳的含硫氧化物的气体的还原。构成：通过管2将富含SO2的气体供给到还原塔1的底部，与碳接触以将SO 2还原成S，并通过出口管4从系统排出。还原塔中的温度 1通过放置在多个点处的多个温度计测量，并且通过高选择器11选择最高温度。将所获得的最高温度与由控制器12由功能发生器10给出的目标温度进行比较，并通过比例和积分行动。结果，目标氧浓度由控制器13预先设定，目标送风信号被传送，操作信号从控制器14传送到气流控制阀7. SO2的还原可以通过这个过程在高转化。

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