CN104235819A - Control method for parallel operation of steam-driven induced draft fan and electric induced draft fan of thermal power generating unit - Google Patents
Control method for parallel operation of steam-driven induced draft fan and electric induced draft fan of thermal power generating unit Download PDFInfo
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Abstract
The invention relates to a control method for parallel operation of steam-driven induced draft fans and an electric induced draft fan of a thermal power generating unit. The method is used for the working condition of parallel operation of two steam-driven induced draft fans and one electric induced draft fan after energy-saving and emission-reducing upgrade reconstruction of a unit; the electric induced draft fan is placed between the two steam-driven induced draft fans and is used as a public induced draft fan; at the startup stage of the unit, since the steam source pressure of the steam-driven induced draft fans is not enough, the electric induced draft fan is utilized for establishing an air passage for furnace purge and boiler ignition, the steam-driven induced draft fans are not started up until a boiler has enough steam source pressure and vacuum of a small steam turbine condenser is established, and after the steam-driven induced draft fans are connected into a system, the electric induced draft fan exits system operation; furnace pressure control comprises electric induced draft fan stationary blade control, steam-driven induced draft fan stationary blade control, steam-driven induced draft fan revolving speed control and steam-driven induced draft fan system connection control. The control method for parallel operation of the steam-driven induced draft fans and the electric induced draft fan of the thermal power generating unit has the advantages that the effects of steam-driven induced draft fan energy saving and emission reduction are realized under normal operating conditions, the electric induced draft fan can guarantee the effect of safe operation of the unit in unit startup, shutdown and accident states, and the diversification of furnace pressure control methods is realized.
Description
technical field
The invention belongs to thermal power generation unit automatic control technology field, particularly relate to a kind of fired power generating unit steam-driven induced draft fan and electronic air-introduced machine paired running control method, can be used for after unit carries out energy-saving and emission-reduction upgrading, the automatic control of 2 steam-driven induced draft fans and 1 electronic air-introduced machine paired running.
Background technology
Along with China's putting more effort to energy-saving and emission-reduction, the air and flue system of each Thermal Power Enterprises to unit is transformed, after increase denitrating system and desulphurization system canceling gas bypass baffle plate, flue gas resistance increases, need the capacity increasing air-introduced machine, adopt steam-driven induced draft fan and electronic air-introduced machine paired running to be a kind of new technology.Adopt 2 steam-driven induced draft fans to run when unit normally runs and control furnace pressure, Unit Commitment stage and accident conditions adopt electronic air-introduced machine isolated operation to control furnace pressure or steam-driven induced draft fan and electronic air-introduced machine paired running and control furnace pressure.Adopt steam-driven induced draft fan can put forward high-octane utilization ratio, reduce station service power consumption rate simultaneously, and avoid id-motor to drive the large problem of starting current produced.In research unit running process, the control problem of 3 air-introduced machines, has very important practical significance to the guarantee safe and stable operation of unit and the effects of energy saving and emission reduction of unit.
Numerous domestic scholars was studied and discussion fired power generating unit steam-driven induced draft fan control relevant issues in recent years, " 1036MW unit steam-driven induced draft fan control strategy optimization and the degree of depth energy saving research thereof " of such as " Proceedings of the CSEE " introduces the system configuration of steam-driven induced draft fan, analyze the adjusting function of steam-driven induced draft fan, energy-saving run and in actual motion Problems existing, and the energy conservation optimizing method of control strategy is proposed, not only increase the security of the fault fast cutback of air-introduced machine, and the quick-reaction capability added combustion chamber draft, reach the object that the steam-driven induced draft fan degree of depth is energy-conservation." debugging of back pressure type steam-driven induced draft fan " of " China Power " describes carbonated drink flow process and the flue gas system flow process of back pressure type steam-driven induced draft fan, the rotating speed of air-introduced machine before and after the system reform, power, control strategy are compared, proposes how to judge whether adjustable speed fan brings the regulating measures in load and fan parallel-connection process on the method for operation, control strategy." application of steam-driven induced draft fan in ultra supercritical 1000MW unit " of " thermal power generation " adopts small turbine to drive air-introduced machine after merging for certain power plant ultra supercritical 1000MW unit boiler air-introduced machine and desulphurization devices, analyze steam-driven induced draft fan to the impact of the main operating index of power plant, result shows, after Large Copacity blower fan adopts small turbine to drive, avoid the impact to station service electrical system in blower fan starting process, significantly reduce station service power consumption rate.Chinese patent " Thermal generation unit air-introduced machine small turbine drive hearth vacuum control method and system " number of patent application CN201110099445.6, propose a kind of combustion chamber draft autocontrol method and system of gigawatt Thermal generation unit air-introduced machine small turbine drive: combustion chamber draft to be exerted oneself size adjustment by air-introduced machine, by changing guide-vane for fan aperture and driving the little steam turbine rotating speed of air-introduced machine to control, automatic control process has been come by control loop, control loop measures the negative pressure in burner hearth in real time, and the negative pressure measured and setting value are compared, by regulating loops such as the proportional integral links of control loop Program, signal and control air-introduced machine guide vane opening or small turbine rotating speed, to maintain the stable of combustion chamber draft.Chinese patent " thermal power plant steam-driven induced draft fan steam discharge cooling indirect air cooling system " number of patent application CN201220654754.5, propose a kind of thermal power plant steam-driven induced draft fan steam discharge cooling indirect air cooling system, be applicable to the time use that thermal power plant main frame is indirect air cooling system.Chinese patent " the online diagnosis of energy saving control system of a kind of thermal power plant steam-driven induced draft fan " number of patent application CN201310211401.7, propose the online diagnosis of energy saving control system of a kind of thermal power plant steam-driven induced draft fan, comprise diagnosis of energy saving device, diagnosis of energy saving device comprises data acquisition module, ature of coal and electricity price information acquisition module, database and administration module, online diagnosis of energy saving module, user interface information processing module and display, thus realizes carrying out real-time online coal consumption difference analysis to operating steam-driven induced draft fan.
These documents and patent are mainly set forth from steam-driven induced draft fan aspects such as the exhaust types of cooling of the control of furnace pressure, the energy-saving effect of steam-driven induced draft fan and steam-driven induced draft fan above, and propose steam-driven induced draft fan Control System Design method and application example, but after carrying out energy-saving and emission-reduction upgrading to unit, the control problem of 2 steam-driven induced draft fans and 1 electronic air-introduced machine paired running is not studied targetedly.
summary of the invention
For above-mentioned problems of the prior art, the invention provides a kind of fired power generating unit steam-driven induced draft fan and electronic air-introduced machine paired running control method, its objective is to solve after fired power generating unit carries out energy-saving and emission-reduction upgrading, the control problem of 2 steam-driven induced draft fans and 1 electronic air-introduced machine paired running, while meeting unit energy-saving and emission-reduction requirement, ensure the stability of major parameter.
The object of the invention is to be achieved through the following technical solutions:
Fired power generating unit steam-driven induced draft fan and electronic air-introduced machine paired running control method, is characterized in that comprising the following steps:
The first step: unit starting process steps is as follows: 1) start electronic air-introduced machine, set up air duct, controls furnace pressure by electronic air-introduced machine; 2) ignition of the boiler, heats up, boosts; 3) steam turbine red switch, grid-connected, load up; 4), after steam-driven induced draft fan vapour source meets the demands, the 1st steam-driven induced draft fan is started; 5) the 1st steam-driven induced draft fan is incorporated to air and flue system, with electronic air-introduced machine paired running, controls furnace pressure; 6) unit load continues to raise, and starts the 2nd steam-driven induced draft fan; 7) the 2nd steam-driven induced draft fan is incorporated to air and flue system, and electronic air-introduced machine exits air and flue system simultaneously, controls furnace pressure by 2 steam-driven induced draft fans; 8) stop electronic air-introduced machine, proceed to stand-by state;
Second step: compressor emergency shutdown process steps is as follows: 1) unit reduces load, and 1 steam-driven induced draft fan exits air and flue system, stops the steam-driven induced draft fan exiting; 2) start electronic air-introduced machine, be incorporated to air and flue system; 3) unit continues to reduce load, and the 2nd steam-driven induced draft fan exits air and flue system, stops the steam-driven induced draft fan exiting; 4) unit controls furnace pressure by electronic air-introduced machine, continues to reduce load; 5), after load is reduced to tolerance level, shut down.
Described steam-driven induced draft fan and electronic air-introduced machine paired running refer to: unit carries out energy-saving and emission-reduction upgrading, increase denitrating system and desulphurization system canceling gas bypass baffle plate, air-introduced machine is transformed, totally 3 air-introduced machines after transformation, 2 steam-driven induced draft fans simultaneously, 1 electronic air-introduced machine, and this electronic air-introduced machine is placed in the middle of 2 steam-driven induced draft fans, at the unit starting initial stage, control furnace pressure by electronic air-introduced machine, when unit normally runs, control furnace pressure by 2 steam-driven induced draft fans.
Described electronic air-introduced machine is placed in the middle of 2 steam-driven induced draft fans and refers to: electronic air-introduced machine uses as the public air-introduced machine in the middle of 2 steam-driven induced draft fans, the unit starting stage, vapour source insufficient pressure, electronic air-introduced machine is utilized to set up air duct, carry out furnace purge and ignition of the boiler, possess after vapour source and small turbine condenser vacuum are set up until boiler and restart steam-driven induced draft fan, after steam-driven induced draft fan is incorporated to system, electronic air-introduced machine logs off operation.
Described electronic air-introduced machine uses as air-introduced machine for subsequent use and refers to: electronic air-introduced machine is positioned in the middle of 2 steam-driven induced draft fans, be connected with flue gas system by mother's pipe, therefore electronic air-introduced machine both can use as the air-introduced machine of A side, coordinate with A Lateral supply machine, also can use as the air-introduced machine of B side, coordinate with B Lateral supply machine, electronic air-introduced machine in the stand-by state, after there is any 1 steam-driven induced draft fan tripping operation, while there is RB action in unit, the electronic air-introduced machine of interlocked startup, is incorporated to air and flue system, ensures the capacity of unit.
Described furnace pressure controls to comprise 4 kinds of modes: 1) electronic air-introduced machine stack vane control, this control loop is used for the Unit Commitment stage and steam-driven induced draft fan is incorporated to the air and flue system stage, adopt conventional unity loop control strategy, and the function introducing pressure fan movable vane aperture is as feedforward instruction, 2) steam-driven induced draft fan stack vane control, this control loop is used for steam-driven induced draft fan shutdown process and unit low load stage, adopts conventional unity loop control strategy, and the function introducing pressure fan movable vane aperture is as feedforward instruction, 3) steam-driven induced draft fan rotating speed controls, this control loop is used for unit normal operating phase, adopt cascade loop control strategy, master selector equals setting value for controlling boiler furnace pressure actual value, and the function introducing pressure fan movable vane aperture is as feedforward instruction, secondary controller is that rotating speed controls, and the automatic adjustable range of rotating speed is 3000 ~ 6000 r/min., 4) steam-driven induced draft fan is incorporated to Systematical control, this control relates to electronic air-introduced machine stack vane control, steam-driven induced draft fan stack vane control and steam-driven induced draft fan rotating speed control, when 1st steam-driven induced draft fan is incorporated to air and flue system, first electronic air-introduced machine stator blade is dropped into automatically, maintain furnace pressure, it is constant that steam-driven induced draft fan small turbine rotating speed maintains 3000 r/min, increase steam-driven induced draft fan stator blade aperture gradually, after significant change appears in furnace pressure, then show that steam-driven induced draft fan is incorporated to system, the 2nd steam-driven induced draft fan is restarted in increase along with load, be incorporated to system, then electronic air-introduced machine turns down stator blade gradually and to log off operation.
The invention has the beneficial effects as follows:
(1) for realizing after fired power generating unit carries out energy-saving and emission-reduction upgrading, in air and flue system, the control problem of 2 steam-driven induced draft fans and 1 electronic air-introduced machine paired running provides technology to ensure.
(2), under realizing accidental conditions, the effect of steam-driven induced draft fan energy-saving and emission-reduction, under Unit Commitment and accident condition, electronic air-introduced machine can ensure the effect of the safe operation of unit.
(3) realize the variation of furnace pressure control mode, comprise electronic air-introduced machine stack vane control, steam-driven induced draft fan stack vane control, the control of steam-driven induced draft fan rotating speed.
accompanying drawing illustrates:
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is air and flue system figure of the present invention;
Fig. 2 is steam-driven induced draft fan boiler circuit of the present invention.
Detailed description of the invention
The present invention is a kind of fired power generating unit steam-driven induced draft fan and electronic air-introduced machine paired running control method, comprises the steps:
The first step: unit starting process steps is as follows: 1) start electronic air-introduced machine, set up air duct, controls furnace pressure by electronic air-introduced machine; 2) ignition of the boiler, heats up, boosts; 3) steam turbine red switch, grid-connected, load up; 4), after steam-driven induced draft fan vapour source meets the demands, the 1st steam-driven induced draft fan is started; 5) the 1st steam-driven induced draft fan is incorporated to air and flue system, with electronic air-introduced machine paired running, controls furnace pressure; 6) unit load continues to raise, and starts the 2nd steam-driven induced draft fan; 7) the 2nd steam-driven induced draft fan is incorporated to air and flue system, and electronic air-introduced machine exits air and flue system simultaneously, controls furnace pressure by 2 steam-driven induced draft fans; 8) stop electronic air-introduced machine, proceed to stand-by state;
Second step: compressor emergency shutdown process steps is as follows: 1) unit reduces load, and 1 steam-driven induced draft fan exits air and flue system, stops the steam-driven induced draft fan exiting; 2) start electronic air-introduced machine, be incorporated to air and flue system; 3) unit continues to reduce load, and the 2nd steam-driven induced draft fan exits air and flue system, stops the steam-driven induced draft fan exiting; 4) unit controls furnace pressure by electronic air-introduced machine, continues to reduce load; 5), after load is reduced to tolerance level, shut down.
Described fired power generating unit steam-driven induced draft fan and electronic air-introduced machine paired running control method, it is characterized in that: described steam-driven induced draft fan and electronic air-introduced machine paired running refer to: unit carries out energy-saving and emission-reduction upgrading, increase denitrating system and desulphurization system canceling gas bypass baffle plate, air-introduced machine is transformed simultaneously, totally 3 air-introduced machines after transformation, 2 steam-driven induced draft fans, 1 electronic air-introduced machine, and this electronic air-introduced machine is placed in the middle of 2 steam-driven induced draft fans, the unit starting initial stage, furnace pressure is controlled by electronic air-introduced machine, when unit normally runs, furnace pressure is controlled by 2 steam-driven induced draft fans.
Described fired power generating unit steam-driven induced draft fan and electronic air-introduced machine paired running control method, it is characterized in that: described electronic air-introduced machine is placed in the middle of 2 steam-driven induced draft fans and refers to: electronic air-introduced machine uses as the public air-introduced machine in the middle of 2 steam-driven induced draft fans, the unit starting stage, vapour source insufficient pressure, electronic air-introduced machine is utilized to set up air duct, carry out furnace purge and ignition of the boiler, steam-driven induced draft fan is restarted after boiler possesses vapour source and small turbine condenser vacuum is set up, after steam-driven induced draft fan is incorporated to system, electronic air-introduced machine logs off operation.
Described fired power generating unit steam-driven induced draft fan and electronic air-introduced machine paired running control method, it is characterized in that: described electronic air-introduced machine uses as air-introduced machine for subsequent use and refers to: electronic air-introduced machine is positioned in the middle of 2 steam-driven induced draft fans, be connected with flue gas system by mother's pipe, therefore electronic air-introduced machine both can use as the air-introduced machine of A side, coordinate with A Lateral supply machine, also can use as the air-introduced machine of B side, coordinate with B Lateral supply machine, electronic air-introduced machine in the stand-by state, after there is any 1 steam-driven induced draft fan tripping operation, while there is RB action in unit, the electronic air-introduced machine of interlocked startup, be incorporated to air and flue system, ensure the capacity of unit.
Described fired power generating unit steam-driven induced draft fan and electronic air-introduced machine paired running control method, it is characterized in that: described furnace pressure controls to comprise 4 kinds of modes: 1) electronic air-introduced machine stack vane control, this control loop is used for the Unit Commitment stage and steam-driven induced draft fan is incorporated to the air and flue system stage, adopt conventional unity loop control strategy, and the function introducing pressure fan movable vane aperture is as feedforward instruction, 2) steam-driven induced draft fan stack vane control, this control loop is used for steam-driven induced draft fan shutdown process and unit low load stage, adopts conventional unity loop control strategy, and the function introducing pressure fan movable vane aperture is as feedforward instruction, 3) steam-driven induced draft fan rotating speed controls, this control loop is used for unit normal operating phase, adopt cascade loop control strategy, master selector equals setting value for controlling boiler furnace pressure actual value, and the function introducing pressure fan movable vane aperture is as feedforward instruction, secondary controller is that rotating speed controls, and the automatic adjustable range of rotating speed is 3000 ~ 6000 r/min, 4) steam-driven induced draft fan is incorporated to Systematical control, this control relates to electronic air-introduced machine stack vane control, steam-driven induced draft fan stack vane control and steam-driven induced draft fan rotating speed control, when 1st steam-driven induced draft fan is incorporated to air and flue system, first electronic air-introduced machine stator blade is dropped into automatically, maintain furnace pressure, it is constant that steam-driven induced draft fan small turbine rotating speed maintains 3000 r/min, increase steam-driven induced draft fan stator blade aperture gradually, after significant change appears in furnace pressure, then show that steam-driven induced draft fan is incorporated to system, the 2nd steam-driven induced draft fan is restarted in increase along with load, be incorporated to system, then electronic air-introduced machine turns down stator blade gradually and to log off operation.
Core concept of the present invention is for realizing after fired power generating unit carries out energy-saving and emission-reduction upgrading, in air and flue system, the control problem of 2 steam-driven induced draft fans and 1 electronic air-introduced machine paired running provides technology to ensure, under realizing accidental conditions simultaneously, the effect of steam-driven induced draft fan energy-saving and emission-reduction, under Unit Commitment and accident condition, electronic air-introduced machine can ensure effect and the variation of furnace pressure control mode of the safe operation of unit.
For certain power plant, transformation and upgrade are carried out to the air and flue system of 600MW supercritical unit below, introduce fired power generating unit steam-driven induced draft fan and electronic air-introduced machine paired running control method.
Unit overview: the overcritical Thermal generation unit boiler of this 600MW is that Harbin Boiler Co., Ltd. manufactures, steam turbine is that Harbin Turbine Factory Co., Ltd. manufactures, and generator is that Harbin Electric Machine Co., Ltd. manufactures.This unit boiler is supercritical parameter Once-through Boiler, resuperheat, single burner hearth balanced draft, ∏ type layout, opposed firing swirl flow combustion mode, all steel framework overhung construction, closed seal, dry ash extraction pulverized-coal fired boiler.Pulverized coal preparation system adopts malleation direct-firing, is furnished with 6 coal pulverizers, and the former electronic air-introduced machine being designed to two 50% capacity maintains furnace pressure.After unit increases denitrating system and desulphurization system canceling gas bypass baffle plate, flue gas resistance increases, the off-capacity of air-introduced machine, air-introduced machine is transformed, intrinsic 2 electronic air-introduced machines are cancelled 1, leaving 1 as starting and air-introduced machine for subsequent use, newly increasing 2 steam-driven induced draft fans as equipment during normal operation.Unit does not need external heat supply, select condensing-type steam-driven induced draft fan, totally 3 air-introduced machines after transformation, newly-increased 2 steam-driven induced draft fans, retain the electronic air-introduced machine in original B side, and this electronic air-introduced machine is placed in the middle of 2 steam-driven induced draft fans, the called after steam-driven induced draft fan A of 3 air-introduced machines, steam-driven induced draft fan B, electronic air-introduced machine, improved air and flue system is as shown in Figure 1.
Electronic air-introduced machine and steam-driven induced draft fan control characteristic difference are comparatively large, therefore control separately electronic air-introduced machine, use as the public air-introduced machine in the middle of 2 steam-driven induced draft fans.In the unit starting stage, vapour source insufficient pressure, utilizes electronic air-introduced machine to set up air duct, carry out furnace purge and ignition of the boiler, possess after vapour source and small turbine condenser vacuum are set up until boiler and restart steam-driven induced draft fan, after steam-driven induced draft fan is incorporated to system, electronic air-introduced machine logs off operation.
Retain the electronic air-introduced machine measuring point in original B side wiring position in the controls after transformation, the roll-call in former controller and control logic are revised accordingly, matches with new control strategy.Electronic air-introduced machine starts B side air duct in enabled condition and sets up, and is revised as A side or the foundation of B side air duct.In electronic fan trip condition, B side air-introduced machine runs and trips with B side air preheater, tripping operation B side air-introduced machine, and be revised as the operation of electronic air-introduced machine and trip with A, B side air preheater, trip electronic air-introduced machine.
Electronic air-introduced machine stator blade cut manual condition (or): electronic air-introduced machine stops; Electronic air-introduced machine entrance stator blade actuator failure; Furnace pressure measuring point fault; Steam-driven induced draft fan stator blade is in automated manner; Steam-driven induced draft fan rotating speed is in automated manner.
Electronic air-introduced machine is positioned in the middle of 2 steam-driven induced draft fans, and be connected with flue gas system by mother's pipe, therefore electronic air-introduced machine both can use as the air-introduced machine of A side, coordinated with A Lateral supply machine, also can use as the air-introduced machine of B side, coordinate with B Lateral supply machine.Pressure fan starts in permission has 1 operation in 2 air-introduced machines, changes in 3 air-introduced machines and has 1 operation; In A (B) Lateral supply machine trip condition, A (B) air-introduced machine stops, and changes A (B) steam-driven induced draft fan into and stops and the stopping of electronic air-introduced machine; In primary air fan trip condition, 2 air-introduced machines stop, and change 3 air-introduced machines into and stop; In MFT condition, 2 air-introduced machines stop, and change 3 air-introduced machines into and stop; There is 1 operation in 2 air-introduced machines in purging condition, change in 3 air-introduced machines and have 1 operation.
The control of steam-driven induced draft fan is more complicated than the control of steam feed pump, and mainly caused by system architecture and controlled device characteristic complexity, improved steam-driven induced draft fan boiler circuit as shown in Figure 2.The design of control strategy is mainly divided into auxiliary control system and main system to control 2 parts.Steam-driven induced draft fan controls newly-increased 4 pairs of controllers, and wherein 2 pairs of controllers are used for auxiliary control system, and 2 pairs of controllers are used for main system and control.
Auxiliary control system is: every platform air-introduced machine small turbine vacuum system configures 2 vavuum pumps, for subsequent use each other.Condensate return system configures 2 condensate pumps, for subsequent use each other, and condensate water is reclaimed by access host condenser after condensate pump boosting, and condensate pump exports female pipe 1 pneumatic adjustment doors, controls condenser water level.Gland seal system steam supply gets vapour source identical with small turbine admission, and by governor valve control pressure as small turbine shaft seal steam, small turbine gland packing leakage is by the special shaft sealing cooler condensation arranged.Lubricating oil system configures 2 interchange oil pumps, 1 direct current oil pump, and lower 2 the interchange oil pumps of nominal situation are for subsequent use each other, chain promoter direct current oil pump under accident conditions.
Main system controls: the rotating speed control and protection tripping operation of steam-driven induced draft fan controls close with the relevant control of steam feed pump.Difference is that steam-driven induced draft fan is when starting red switch, needs the adjustment of air-introduced machine stator blade to coordinate, and steam feed pump, when starting red switch, needs the adjustment of feed pump recirculation door to coordinate.The trip protection of steam-driven induced draft fan comprises the protection of small turbine and the protection of air-introduced machine body, and the trip protection of steam feed pump comprises the protection of small turbine and the protection of feed pump body.Steam-driven induced draft fan is when starting, and small turbine subpunch goes to warming-up rotating speed, and stator blade is opened to 5% and kept, after warming-up terminates, small turbine continues raising speed, after rotating speed reaches 3000 r/min, drop into remote control mode, regulated according to furnace pressure by operations staff, startup completes.The stopping process of steam-driven induced draft fan in contrast, after small turbine rotating speed is lower than 2800 r/min, closes stator blade gradually, and after stator blade aperture is lower than 10%, small turbine continues to reduce rotating speed, beats gate stop-start.
The automated manner of steam-driven induced draft fan comprises stator blade automated manner and rotating speed automated manner, 2 kinds of automated manners can only select a kind of input with the time, in order to ensure no-harass switch, before 2 kinds of modes switch, first stator blade and rotating speed are all switched to manually, then select a kind of mode to drop into automatically.
Claims (5)
1. fired power generating unit steam-driven induced draft fan and electronic air-introduced machine paired running control method, is characterized in that comprising the following steps:
The first step: unit starting process steps is as follows: 1) start electronic air-introduced machine, set up air duct, controls furnace pressure by electronic air-introduced machine; 2) ignition of the boiler, heats up, boosts; 3) steam turbine red switch, grid-connected, load up; 4), after steam-driven induced draft fan vapour source meets the demands, the 1st steam-driven induced draft fan is started; 5) the 1st steam-driven induced draft fan is incorporated to air and flue system, with electronic air-introduced machine paired running, controls furnace pressure; 6) unit load continues to raise, and starts the 2nd steam-driven induced draft fan; 7) the 2nd steam-driven induced draft fan is incorporated to air and flue system, and electronic air-introduced machine exits air and flue system simultaneously, controls furnace pressure by 2 steam-driven induced draft fans; 8) stop electronic air-introduced machine, proceed to stand-by state;
Second step: compressor emergency shutdown process steps is as follows: 1) unit reduces load, and 1 steam-driven induced draft fan exits air and flue system, stops the steam-driven induced draft fan exiting; 2) start electronic air-introduced machine, be incorporated to air and flue system; 3) unit continues to reduce load, and the 2nd steam-driven induced draft fan exits air and flue system, stops the steam-driven induced draft fan exiting; 4) unit controls furnace pressure by electronic air-introduced machine, continues to reduce load; 5), after load is reduced to tolerance level, shut down.
2. fired power generating unit steam-driven induced draft fan according to claim 1 and electronic air-introduced machine paired running control method, it is characterized in that: described steam-driven induced draft fan and electronic air-introduced machine paired running refer to: unit carries out energy-saving and emission-reduction upgrading, increase denitrating system and desulphurization system canceling gas bypass baffle plate, air-introduced machine is transformed simultaneously, totally 3 air-introduced machines after transformation, 2 steam-driven induced draft fans, 1 electronic air-introduced machine, and electronic air-introduced machine is placed in the middle of 2 steam-driven induced draft fans, the unit starting initial stage, furnace pressure is controlled by electronic air-introduced machine, when unit normally runs, furnace pressure is controlled by 2 steam-driven induced draft fans.
3. fired power generating unit steam-driven induced draft fan according to claim 2 and electronic air-introduced machine paired running control method, it is characterized in that: described electronic air-introduced machine is placed in the middle of 2 steam-driven induced draft fans and refers to: electronic air-introduced machine uses as the public air-introduced machine in the middle of 2 steam-driven induced draft fans, the unit starting stage, vapour source insufficient pressure, electronic air-introduced machine is utilized to set up air duct, carry out furnace purge and ignition of the boiler, steam-driven induced draft fan is restarted after boiler possesses vapour source and small turbine condenser vacuum is set up, after steam-driven induced draft fan is incorporated to system, electronic air-introduced machine logs off operation.
4. fired power generating unit steam-driven induced draft fan according to claim 1 and electronic air-introduced machine paired running control method, it is characterized in that: described electronic air-introduced machine uses as air-introduced machine for subsequent use and refers to: electronic air-introduced machine is positioned in the middle of 2 steam-driven induced draft fans, be connected with flue gas system by mother's pipe, therefore electronic air-introduced machine both can use as the air-introduced machine of A side, coordinate with A Lateral supply machine, also can use as the air-introduced machine of B side, coordinate with B Lateral supply machine, electronic air-introduced machine in the stand-by state, after there is any 1 steam-driven induced draft fan tripping operation, while there is RB action in unit, the electronic air-introduced machine of interlocked startup, be incorporated to air and flue system, ensure the capacity of unit.
5. fired power generating unit steam-driven induced draft fan according to claim 1 and electronic air-introduced machine paired running control method, it is characterized in that: described furnace pressure controls to comprise 4 kinds of modes: 1) electronic air-introduced machine stack vane control, this control loop is used for the Unit Commitment stage and steam-driven induced draft fan is incorporated to the air and flue system stage, adopt conventional unity loop control strategy, and the function introducing pressure fan movable vane aperture is as feedforward instruction, 2) steam-driven induced draft fan stack vane control, this control loop is used for steam-driven induced draft fan shutdown process and unit low load stage, adopts conventional unity loop control strategy, and the function introducing pressure fan movable vane aperture is as feedforward instruction, 3) steam-driven induced draft fan rotating speed controls, this control loop is used for unit normal operating phase, adopt cascade loop control strategy, master selector equals setting value for controlling boiler furnace pressure actual value, and the function introducing pressure fan movable vane aperture is as feedforward instruction, secondary controller is that rotating speed controls, and the automatic adjustable range of rotating speed is 3000 ~ 6000 r/min, 4) steam-driven induced draft fan is incorporated to Systematical control, this control relates to electronic air-introduced machine stack vane control, steam-driven induced draft fan stack vane control and steam-driven induced draft fan rotating speed control, when 1st steam-driven induced draft fan is incorporated to air and flue system, first electronic air-introduced machine stator blade is dropped into automatically, maintain furnace pressure, it is constant that steam-driven induced draft fan small turbine rotating speed maintains 3000 r/min, increase steam-driven induced draft fan stator blade aperture gradually, after significant change appears in furnace pressure, then show that steam-driven induced draft fan is incorporated to system, the 2nd steam-driven induced draft fan is restarted in increase along with load, be incorporated to system, then electronic air-introduced machine turns down stator blade gradually and to log off operation.
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| CN201410363184.8A CN104235819A (en) | 2014-07-29 | 2014-07-29 | Control method for parallel operation of steam-driven induced draft fan and electric induced draft fan of thermal power generating unit |
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| CN201410363184.8A CN104235819A (en) | 2014-07-29 | 2014-07-29 | Control method for parallel operation of steam-driven induced draft fan and electric induced draft fan of thermal power generating unit |
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| CN201410363184.8A Pending CN104235819A (en) | 2014-07-29 | 2014-07-29 | Control method for parallel operation of steam-driven induced draft fan and electric induced draft fan of thermal power generating unit |
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| CN104914735A (en) * | 2015-05-08 | 2015-09-16 | 华北电力科学研究院有限责任公司 | Fan decoupling control method and fan decoupling control device |
| CN104948240A (en) * | 2015-06-01 | 2015-09-30 | 宋子琛 | Exhaust steam waste heat recycling system for small steam turbine of induced draft fan through circulating water based on steam turbine driving |
| CN105387478A (en) * | 2015-12-08 | 2016-03-09 | 江苏方天电力技术有限公司 | Air deflector structure in main used after flow converging of induced draft fans |
| CN105927961A (en) * | 2016-04-22 | 2016-09-07 | 国家电网公司 | Automatic paralleling method and device for steam-driven induced draft fans of thermal power generating unit |
| CN106050336A (en) * | 2016-05-24 | 2016-10-26 | 大唐淮北发电厂 | Ultra-supercritical generator set |
| TWI655397B (en) * | 2017-12-15 | 2019-04-01 | 潔醇事業股份有限公司 | Turbocharged burner |
| TWI655396B (en) * | 2017-12-15 | 2019-04-01 | 潔醇事業股份有限公司 | Supercharged burner |
| CN110410367A (en) * | 2019-08-06 | 2019-11-05 | 华能国际电力股份有限公司海门电厂 | A kind of steam-driven induced draft fan guide vane adaptive-optimum control method |
| CN110630551A (en) * | 2019-09-10 | 2019-12-31 | 中国能源建设集团华中电力试验研究院有限公司 | Automatic paralleling method and system for induced draft fans of thermal generator set |
| CN112228893A (en) * | 2020-10-23 | 2021-01-15 | 大唐湘潭发电有限责任公司 | Air volume adjusting device and method for draught fan of large power station boiler |
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| CN114296341A (en) * | 2021-12-30 | 2022-04-08 | 华润电力技术研究院有限公司 | Control method of generator set and related equipment |
| CN114483630A (en) * | 2022-01-14 | 2022-05-13 | 华能(浙江)能源开发有限公司玉环分公司 | Steam-driven draught fan stationary blade control system of thermal power plant |
| CN114607632A (en) * | 2022-03-22 | 2022-06-10 | 中国能源建设集团华中电力试验研究院有限公司 | Method, system and device for operating induced draft fan of thermal generator set |
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| CN104914735A (en) * | 2015-05-08 | 2015-09-16 | 华北电力科学研究院有限责任公司 | Fan decoupling control method and fan decoupling control device |
| CN104948240A (en) * | 2015-06-01 | 2015-09-30 | 宋子琛 | Exhaust steam waste heat recycling system for small steam turbine of induced draft fan through circulating water based on steam turbine driving |
| CN105387478A (en) * | 2015-12-08 | 2016-03-09 | 江苏方天电力技术有限公司 | Air deflector structure in main used after flow converging of induced draft fans |
| CN105927961A (en) * | 2016-04-22 | 2016-09-07 | 国家电网公司 | Automatic paralleling method and device for steam-driven induced draft fans of thermal power generating unit |
| CN106050336A (en) * | 2016-05-24 | 2016-10-26 | 大唐淮北发电厂 | Ultra-supercritical generator set |
| TWI655397B (en) * | 2017-12-15 | 2019-04-01 | 潔醇事業股份有限公司 | Turbocharged burner |
| TWI655396B (en) * | 2017-12-15 | 2019-04-01 | 潔醇事業股份有限公司 | Supercharged burner |
| CN110410367A (en) * | 2019-08-06 | 2019-11-05 | 华能国际电力股份有限公司海门电厂 | A kind of steam-driven induced draft fan guide vane adaptive-optimum control method |
| CN110630551A (en) * | 2019-09-10 | 2019-12-31 | 中国能源建设集团华中电力试验研究院有限公司 | Automatic paralleling method and system for induced draft fans of thermal generator set |
| CN110630551B (en) * | 2019-09-10 | 2020-07-31 | 中国能源建设集团华中电力试验研究院有限公司 | Automatic paralleling method and system for induced draft fans of thermal generator set |
| CN112228893A (en) * | 2020-10-23 | 2021-01-15 | 大唐湘潭发电有限责任公司 | Air volume adjusting device and method for draught fan of large power station boiler |
| CN114017764A (en) * | 2021-11-19 | 2022-02-08 | 西安热工研究院有限公司 | Automatic switching system and method for guide vane and rotating speed control of pneumatic draught fan |
| CN114017764B (en) * | 2021-11-19 | 2023-05-23 | 西安热工研究院有限公司 | Automatic switching system and method for guide vane and rotating speed control of pneumatic induced draft fan |
| CN114296341A (en) * | 2021-12-30 | 2022-04-08 | 华润电力技术研究院有限公司 | Control method of generator set and related equipment |
| CN114296341B (en) * | 2021-12-30 | 2024-03-08 | 华润电力技术研究院有限公司 | Control method of generator set and related equipment |
| CN114483630A (en) * | 2022-01-14 | 2022-05-13 | 华能(浙江)能源开发有限公司玉环分公司 | Steam-driven draught fan stationary blade control system of thermal power plant |
| CN114607632A (en) * | 2022-03-22 | 2022-06-10 | 中国能源建设集团华中电力试验研究院有限公司 | Method, system and device for operating induced draft fan of thermal generator set |
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