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1. 发明专利

JPH0755103A STARTING CONTROL APPARATUS FOR VARIABLE PRESSURE ONCE-THROUGH BOILER 失效
公开(公告)号：JPH0755103A
公开(公告)日：1995-03-03
申请号：JP19632393
申请日：1993-08-06
申请人： BABCOCK HITACHI KK
发明人： KUNIHIRO YUJI
IPC分类号： F22B35/14
摘要： PURPOSE:To provide a starting control apparatus for a variable pressure once-through boiler in which the control of temperature raising and pressure raising of main steam can be constantly carried out according to an intended schedule without regard to whether the boiler is in hot mode or cold mode at the time of boiler firing. CONSTITUTION:A generated electric energy command signal (a) from a signal generator 20 is converted into a pressure raising target temperature by a signal changeover switch 22. Temperature raising rates for raising the boiler water temperature according to the target schedule are set in a temperature raising rate limiter by using a differential signal (b) between temperature and boiler water temperature detected by a temperature detector 22 at an water wall outlet at the time of boiler firing. An output signal (c) from the temperature raising rate limiter is converted into a saturated vapor pressure signal (d) corresponding to the temperature by means of a function generator 25, and the saturated vapor pressure signal is compared with a main steam pressure detected by a main steam pressure detector 26 by means of a subtracter 27. The size and code of the differential signal (f) thus obtained is utilized so as to obtain a drive signal (i) for bypass valves 10, 11 through a proportional/integrating device and a signal changeover device 29.

2. 发明专利

JPH01252803A HOT START METHOD FOR BOILER 失效
公开(公告)号：JPH01252803A
公开(公告)日：1989-10-09
申请号：JP7650788
申请日：1988-03-31
申请人： BABCOCK HITACHI KK
发明人： MORONAGA MASAHARU , KUNIHIRO YUJI , KITANI TADASHI
IPC分类号： F22B35/14 , F22B35/00
摘要： PURPOSE:To reduce the incurring of a starting loss by the shortening of a starting time, by a method wherein when a difference between a main steam temperature at a superheater outlet and a main steam temperature at a turbine inlet is at 30 deg.C and a above and an increase rate of the main steam temperature at the supercharger outlet exceeds 0.3 deg.C per hour, main steam is made to pass to the turbine side. CONSTITUTION:Primarily, a main steam pipe drain valve 12 is left closed, and a boiler is ignited in a state that a high pressure turbine bypass valve 11 is throttled. At this point of time, a superheater 8 is deprived of its metal possessing heat, and a steam temperature at the outlet of the superheater 8 is decreased. However, low temperature steam being generated is prevented from flowing through a main steam pipe 10, and the superheater is prevented from being deprived of a metal possessing temperature. Thereafter, the generated steam temperature of a boiler 1 is increased, and a steam temperature at the outlet of the superheater 8 is also increased. When a temperature difference between the main steam temperature at the outlet of the superheater and a main steam pipe temperature is 28 deg.C and the increasing rate of a steam temperature at the outlet port of the superheater is at least 0.3 deg.C/h, the high pressure turbine bypass valve 11 is closed, and main steam at the outlet port of the superheater 8 is made to pass through the main steam pipe 10 to a high pressure turbine 9.

3. 发明专利

JPS63148004A METHOD OF OPERATING ONCE-THROUGH BOILER 失效
公开(公告)号：JPS63148004A
公开(公告)日：1988-06-20
申请号：JP29161886
申请日：1986-12-09
申请人： BABCOCK HITACHI KK
发明人： KUNIHIRO YUJI
IPC分类号： F22B35/14 , F22B35/00 , F22G5/12

4. 发明专利

JPH07293807A METHOD FOR CONTROLLING WATER FEEDING IN BOILER OF MULTI-SHAFT TYPE COMBINED FACILITY AND WATER FEEDING CONTROL DEVICE 失效
公开(公告)号：JPH07293807A
公开(公告)日：1995-11-10
申请号：JP8500694
申请日：1994-04-22
申请人： BABCOCK HITACHI KK
发明人： KUNIHIRO YUJI , SHIGENAKA TOSHINORI
IPC分类号： F22D5/30
摘要： PURPOSE:To perform a fast adjustment of a flow rate of boiler feedwater at an operating shaft in concurrent with a trip of a condensate pump and continue a safe operation by a method wherein each of stages for feeding condensate flowed from a steam turbine to a boiler is provided and a flow rate of feedwater to the boiler is controlled with a valve opening degree signal calculated through each of the stages. CONSTITUTION:Signals obtained from a drum level setting device 1 and a drum level sensor 2 are calculated as deviation signals by a subtractor 3. In addition, a main steam flow rate signal 4 of generated steam obtained from each of drums and a feedwater flow rate signal 5 are calculated as deviation signals by a substractor 6. Then, a drum level deviation signal and complex deviation signals of three elements added by an adder 7 are made. A feedwater flow rate control valve opening degree signal for each of drums of a boiler is calculated in response to the produced signal. At this time, when a part of a condensate pump is tripped, the feedwater flow rate control valve opening degree signal is prevented from being increased to be higher than a proper boiler feedwater flow rate control valve opening degree signal, the feedwater flow rate is controlled to enable a continuous operation to be carried out.

5. 发明专利

JPH03245820A METHOD FOR SUPPLYING CALCIUM COMPOUND AND SODIUM COMPOUND TO ABSORBING TOWER OF WET WASTE GAS DESULFURIZING EQUIPMENT 失效
公开(公告)号：JPH03245820A
公开(公告)日：1991-11-01
申请号：JP4025990
申请日：1990-02-21
申请人： BABCOCK HITACHI KK
发明人： OKAWA TAKESHI , KUNIHIRO YUJI , KATSUBE TOSHIO , NAKAMOTO TAKANORI
IPC分类号： B01D53/50 , B01D53/34 , B01D53/77
摘要： PURPOSE:To stably operate desulfurizing equipment by correcting the supply amounts of a sodium compound and a calcium compound to an absorbing tower to proper amounts when an absorbing solution is judged to be abnormal because of the lowering of the activity of the absorbing solution diagnosed on the basis of the calculated velocity constant of dissolution of the calcium compound. CONSTITUTION:A calculated SO2 absorbing amount signal 17, an HCl concn. signal 18 and an HF concn. signal 19 are inputted and the concn. 20 of Ca in an absorbing solution, the concn. 21 of CaCO3 therein and the pH signal 12 of an absorbing tower are used by an absorbing tower liquid property operator 16 and the velocity constant 26 of dissolution of limestone is calculated by a limestone velocity constant-of- dissolution operator 22 and evaluated and diagnosed as the activity of the absorbing solution by an activity diagnosing device 24 and, when the constant 26 is judged to be abnormal, guidance is outputted and the elapse of abnormality is subjected to trend display. The optimum operation quantity 28 keeping normal activity is calculated from the diagnosed result, the concn. 21 of CaCO3, Na concn. 23 and the pH signal 12 of the absorbing tower by an optimum operation quantity operator 27 to be inputted to a control apparatus.

6. 发明专利

JPH03164601A PRESSURE CONTROLLER FOR AUXILIARY STEAM MOTHER PIPE IN BOILER 失效
公开(公告)号：JPH03164601A
公开(公告)日：1991-07-16
申请号：JP30325889
申请日：1989-11-24
申请人： BABCOCK HITACHI KK
发明人： TOKUDA YOSHIHARU , HASEGAWA HIROYUKI , KUNIHIRO YUJI , MIYAKE MORIJI
IPC分类号： F22B35/00 , F22B35/14
摘要： PURPOSE:To suppress variation in the steam pressure of auxiliary steam mother pipe to a much smaller variation by incorporating both pressure regulating valves of auxiliary steam mother pipes on the boiler side and low temperature reheating side into a starting bypass control system and switching gradually the pressure set values of the steam pressure regulating valves at the times of boiler starting and boiler stopping. CONSTITUTION:The pressure in an auxiliary steam mother pipe before the steam sources are switched is controlled to a set pressure by a pressure regulating valve 6 for the auxiliary steam mother pipe on the boiler side. The difference between the set value of the pressure on the side of low temperature reheating and the pressure detected by a pressure sensor 1 of the auxiliary steam mother pipe is zero, and the bias portion that is generated by an offset bias generator 8 is already subtracted and the signal to a pressure regulator 7 of the auxiliary steam mother pipe on the low temperature reheating side is always negative so that the valve 7 is fully closed. When the steam pressure on the low temperature reheating side is over a specified value, the signal from the offset bias generator 8 moves to the boiler side from the low temperature reheating side and the instruction signal to the pressure regulating valve 7 becomes positive and it is gradually opened. On the other hand the instruction signal to the pressure regulating valve 6 is negative because the offset bias portion is subtracted and it is gradually closed.

7. 发明专利

JPH02169918A AIR FLOW RATE CONTROL DEVICE 失效
公开(公告)号：JPH02169918A
公开(公告)日：1990-06-29
申请号：JP32189988
申请日：1988-12-22
申请人： BABCOCK HITACHI KK
发明人： KUNIHIRO YUJI
IPC分类号： F23N3/00 , F23N1/02
摘要： PURPOSE:To keep the combustion state stable as well as prevent the generation of unburnt matter by compensating the leak from a nonoperating burner and the increased portion of the leak air from an extinguished burner and supplying air for combustion burners of a burner group. CONSTITUTION:Leak air volume from unoperating burners can be created by a function generator 18 on the basis of the differential pressure signal detected by a furnace/wind box differential pressure detector 17. Then, a total signal of leak air volume of a burner group is produced by multiplying the leak air volume by the signal 16 of the number of nonoperating burners by means of a multiplier 19. The total signal of leak air volume is sent to an adder 13 to be added to the signal of necessary combustion-air flow rate in accordance with the fuel flow rate. The difference between this signal and the output of a detector 15 of air flow rate supplied to the burner group is created by a subtracter 14, and this deviation signal is converted to the operating signal of damper opening by a proportional integrator 20 in order to adjust an adjusting damper 22 through an automatic/manual operation switcher. In this way, the shortage of air for combustion of burners during combustion is prevented, and the optimum state of combustion is always maintained.

8. 发明专利

JPH07145928A METHOD AND APPARATUS FOR CONTROLLING FUEL GAS 失效
公开(公告)号：JPH07145928A
公开(公告)日：1995-06-06
申请号：JP29360493
申请日：1993-11-24
申请人： BABCOCK HITACHI KK
发明人： KUNIHIRO YUJI
IPC分类号： F23N1/00
摘要： PURPOSE:To save fuel and to stabilize controllability of a fuel. flow controller at the time of starting by eliminating dissipation of fuel gas into the atmosphere at the time of starting. CONSTITUTION:The apparatus for controlling fuel gas has a gas pressure regulating valve 2 at an upstream side of a gas supply conduit 10 to a burner 8 and a gas flow regulating valve 4 at its downstream, and comprises a unit for regulating a set pressure at the time of starting when a gas supply amount to the burner 8 is a predetermined amount or less and a unit for regulating a regulating gas pressure to the set pressure or more at the time of starting when the supply amount to the burner 8 is the predetermined amount or more. Dissipation of fuel gas into the atmosphere at the time of igniting the burner is prevented by providing a burner inlet gas pressure to a low value at the time of starting including the time of igniting the burner. Thus, noise can be prevented due to igniting and discharging of the gas fuel at the time of igniting the burner, the fuel can be saved, and a gas fuel flow control valve at the time of a low load can be stably operated.

9. 发明专利

JPH0427417A METHOD FOR CONTROLLING WET-TYPE STACK GAS DESULFURIZER 失效
公开(公告)号：JPH0427417A
公开(公告)日：1992-01-30
申请号：JP12812690
申请日：1990-05-19
申请人： BABCOCK HITACHI KK
发明人： KATSUBE TOSHIO , NAKAMOTO TAKANORI , KUNIHIRO YUJI , OKAWA TAKESHI
IPC分类号： B01D53/50 , B01D53/30 , B01D53/34 , B01D53/77
摘要： PURPOSE:To accurately recognize the concentration of the component in an absorbent slurry for which continuous measurement is not available by correcting the calculating results of the calculated concentration of the component from the sampling to the present time by using the manual analysis data sampled from absorbent slurry and manually analyzed as an initial data. CONSTITUTION:The various process data such as a flow rate signal 27 from a gas flow meter 22, a concentration signal 28 from inlet SO2 concentration meter 23, a concentration signal 29 from outlet SO2 concentration meter 24, a flow rate signal 30 from the flow meter of the absorbent slurry 25 and a flow rate signal 31 from the flow meter of outlet of an absorbent tower 26 are inputted into an arithmetic unit. These process data (signals 27-31) are recorded into the prescribed address of the data file 42 at every minute time DELTAt (within several second), and the amount of variation of composition is calculated. On the other hand, the analytical data of respective ingredients by manual analysis 40 is inputted into liquid arithmetic unit 39. Also, the concentration of components at the present time is accurately recognized by re-calculating the variation with the lapse of time of the concentration of the component using the analytical data by the manual analysis of the component at sampling time as the initial data.

10. 发明专利

JPH0398617A CONTROL DEVICE OF WET-TYPE EXHAUST SMOKE DESULFURIZATION DEVICE 失效
公开(公告)号：JPH0398617A
公开(公告)日：1991-04-24
申请号：JP23165689
申请日：1989-09-08
申请人： BABCOCK HITACHI KK
发明人： KATSUBE TOSHIO , NAKAMOTO TAKANORI , KUNIHIRO YUJI , OKAWA TAKESHI , NISHIMURA MASAKATSU , NOZAWA SHIGERU
IPC分类号： B01D53/50 , B01D53/34 , B01D53/77
摘要： PURPOSE:To supply a minimum possible amount of required sulfuric acid by controlling the purity of gypsum during operation and comparing the obtained purity with a reference value. CONSTITUTION:Measurement devices 27, 31 to 36 measure an exhaust gas flow amount signal 38 for the amount of an exhaust gas flowing into a desulfurization device, an exhaust gas sulfur oxide concentration signal 39, a sulfur oxide concentration signal in the exhaust gas at the outlet of a desulfurization device 41, a soot/dust concentration signal 40, an absorbent slurry flow amount signal for the flow amount of absorbent slurry supplied to an absorption tower of a desulfurization device 42, an absorbed slurry flow amount signal for the flow amount of absorbed slurry extracted from an absorption tower 37, a sulfuric acid flow amount signal for the flow amount of sulfuric acid supplied to turn lime in the absorbed slurry to gypsum 43 and the rate of oxide at which calcium sulfite is oxidized to gypsum. In addition, a gypsum purity calculator 44 calculates the purity of byproduct gypsum based on the measurement value of each measurement device. A required sulfuric acid amount calculation device 47 calculates a required sulfuric acid amount which satisfies the specified reference purity value 46 of byproduct gypsum based on the calculated purity of byproduct gypsum. A required sulfuric acid amount supply device 49 supplies the calculated required sulfuric acid amount to absorbed slurry.

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