CN106640235A - Subcritical direct air cooling unit cold starting method - Google Patents
Subcritical direct air cooling unit cold starting method Download PDFInfo
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- CN106640235A CN106640235A CN201611262882.4A CN201611262882A CN106640235A CN 106640235 A CN106640235 A CN 106640235A CN 201611262882 A CN201611262882 A CN 201611262882A CN 106640235 A CN106640235 A CN 106640235A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
- F01K3/20—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters with heating by combustion gases of main boiler
- F01K3/22—Controlling, e.g. starting, stopping
Abstract
The invention discloses a subcritical direct air cooling unit cold starting method. The subcritical direct air cooling unit cold starting method includes that a unit power generator set boiler is prepared, and the boiler is made to reach a preset steam supply condition; the boiler generates steam to built system pressure; the output steam is put into a main steam supply shaft seal system for pipe heating, and is put into a steam turbine shaft seal, so that the unit vacuum can be built; and the output cold is then put into an auxiliary steam system for pipe heating, and is put into an oxygen removing heater and the furnace bottom for heating. A new control manner and a new work method are adopted, after the boiler generates the steam, the operation that pipe heating of the main steam supply shaft seal system is performed, the steam is supplied to the steam turbine shaft seal, the steam is put into the auxiliary gas system for pipe heating, and the steam is put into the oxygen removing heater and the furnace bottom for heating is firstly performed, and a proper running environment is provided for running of a unit in advance, so that starting of the unit can be assisted, an external auxiliary gas source is not needed again, the self-supplied steam enters a pipeline in advance for pipe heating, cleaning and impurity removing are performed, impurities are prevented from entering a steam turbine, the work efficiency of equipment is improved, and the energy consumption needed in the starting stage is reduced.
Description
Technical field
The present invention relates to Large-scale machine set equipment technical field, more particularly, it relates to a kind of subcritical Direct Air-cooled Unit
Cold start method.
Background technology
It is subcritical to refer to the status condition that material is present, refer to Cucumber in temperature higher than its boiling point but less than stagnation temperature
Degree, with fluid form and pressure is less than the material that its critical pressure is present.When temperature is less than a certain numerical value, gas is carried out to add
Pressure, can make gas liquefaction, and more than the temperature, plus much pressure can not all make gas liquefaction；Direct Air-cooled Unit
Refer to that steam turbine finishes the cooling element such as finned-tube bundle that the steam discharge of work(is directly entered air cooling tubes condenser, cooling air is in axle stream wind
The finned-tube bundle of air cooling tubes condenser is flow through in the presence of machine with certain flow rate, the turbine discharge in condenser is directly condensed into knot
Cheng Shui returns to steam exhaust device.Without auxiliary steam source cold start：Refer to that governing stage inwall metal temperature carries out less than 121 DEG C without auxiliary
The startup of vapour source.
Due to being affected by electricity market, unit is declined to a great extent using hourage, and especially summer and autumn wind-powered electricity generation, water power, photovoltaic are sent out
When electricity is high, Large-sized Coal-fired Power group faces two-shipper full cut-off situation, and resume operation two large-scale coal burning machines as reached 330MW
How group, in the case of itself does not introduce standby auxiliary steam source, realize safe and reliable startup, is just particularly important.
Starting trouble exits standby when unit normally runs, and test run starting trouble equipment is arranged before two-shipper full cut-off, and input opens
Dynamic ignition of the boiler, heat-insulation pressure keeping, after two-shipper full cut-off during unit cold start, starting trouble is heated up, boosts to qualified auxiliary steam
To auxiliary vapour system steam supply, subcritical Direct Air-cooled Unit has carried out auxiliary steam source cold start.
During the full cold start of subcritical Direct Air-cooled Unit at this stage, needs separately arrange starting trouble outside working boiler
Steam is provided, carrying out starting front oxygen-eliminating device heating, furnace bottom heating, turbine shaft gland sealing steam supply, air preheater carries out continuous soot blowing, so
The operating cost and maintenance cost of starting trouble are increased, while also result in a certain degree of environmental pollution.
In sum, when how to efficiently solve generation current unit and carrying out the full cold start of subcritical Direct Air-cooled Unit
Need separately to arrange starting trouble, be current ability the problems such as causing operation and maintenance cost higher, and increase environmental pollution
Field technique personnel's urgent problem.
The content of the invention
In view of this, it is an object of the invention to provide a kind of subcritical Direct Air-cooled Unit cold start method, the Asia
Critical Direct Air-cooled Unit cold start method can efficiently solve generation current unit carries out subcritical Direct Air-cooled Unit
Need separately to arrange starting trouble during full cold start, cause operation and maintenance cost higher, and increase environmental pollution etc. to ask
Topic.
In order to achieve the above object, the present invention provides following technical scheme：
A kind of subcritical Direct Air-cooled Unit cold start method, including：
Elementary generator group boiler prepares, and makes the boiler reach default steam supply condition；
Boiler steams and sets up system pressure；
Output steam input main steam is carried out into heating coil for gland seal system, and puts into turbine shaft seal, it is true to set up unit
It is empty；
Auxiliary vapour system is put into again carry out output is cold heating coil, and put into deaerating heater and furnace bottom heating.
Preferably, in above-mentioned startup method, the preparation boiler is described to make the boiler reach default steam supply condition,
Including：
Start water pump to boiler water filling, rinse boiler certain hour；
The feedwater flow of control boiler and time, make the up-draft gasifier of drum less than 40 DEG C, steam water-level reaches ﹣
50mm。
Preferably, in above-mentioned startup method, the boiler steams and sets up system pressure, including：
Prepare and debug spike cooling system；
Whole valves that drum, superheater, reheater lead to emptying are opened, steam drain valve is adjusted, pot is controlled
Stove 5% starts hydrophobic；
Recover fuel system, start an oil pump, charge oil pressure is controlled in 3.0Mpa-3.2Mpa, including endpoint value.
Preferably, in above-mentioned startup method, the boiler steams and sets up system pressure, also includes：
Start the first air-introduced machine, and run first and second pressure fan, make the total blast volume of the boiler is carried out for 400t/h
Burner hearth soot blowing；
Condensate system of resuming operation and vacuum system, start vavuum pump, and unit vacuum is evacuated to more than -28Kpa；
The total blast volume is gradually reduced to 246t/h；
Start the boiler.
Preferably, in above-mentioned startup method, the boiler steams and sets up system pressure, also includes：
Oil gun and cigarette temperature probe are put into predeterminated position in the burner hearth of the boiler, is entered using air preheater supply pulse acetylene
The continuous soot blowing of row.
Preferably, in above-mentioned startup method, the boiler steams and sets up system pressure, also includes：
Unit high pressure turbine by pitch aperture is adjusted into 50%, the steam isolating door of the spike cooling system is opened, is condensed
Water electrically operated gate, electrically operated gate is vacuumized, open specified valve of the final reheater to idle discharge vapour, prevent the reheater tube wall from surpassing
Temperature；
Low pressure cylinder spray valve is opened, steam exhaust device pressure is monitored, when condensing water temperature reaches 45 DEG C, is strengthened to condenser
Change water；And monitor that body expands drain temperature, open body and dredge according to water temperature condition adaptability and expand desuperheat water valve；
When the pressure of the drum reaches 0.15MPa, furnace side superheater emptying manually operated door, drum emptying door are closed electronic
Door, and in boiler of increasing input specified location angle oil gun.
Preferably, it is described that output steam is put into heating coil of the main steam for gland seal system in above-mentioned startup method, and put into
Turbine shaft seal, to set up unit vacuum, including：
When main vapour pressure 0.24Mpa, temperature are 133 DEG C, output steam input main steam is carried out into heating coil for gland seal system；
During the cold 0.3Mpa of pressure again, by steam put into it is cold again for auxiliary vapour system, auxiliary vapour for oxygen-eliminating device system, auxiliary vapour for etc. from
Sub- steam air heater system starts heating coil.
Preferably, it is described that output steam is put into heating coil of the main steam for gland seal system in above-mentioned startup method, and put into
Turbine shaft seal, to set up unit vacuum, also includes：
When unit vacuum reaches -62.5Kpa, by the low bypath system operation of output steam input machine, the reheater is closed
Electrically operated gate to idle discharge vapour；
Start seal fan, the first primary air fan, the second primary air fan and the second air-introduced machine successively；
When it is 181 DEG C that auxiliary vapour header pressure reaches 0.77Mpa, temperature, steam is put into the auxiliary vapour for oxygen-eliminating device system
System and the auxiliary vapour supply plasma steam air heater system；
The row air cooling blower fan of startup first, second, third and the 4th；
When pulverizer outlet temperature reaches 70 DEG C, start coal pulverizer, make it run in minimum coal amount, Boiler pressure control is in 40t/
h-50t/h；
When the air preheater outlet temperature rises to 140 DEG C, the coal pulverizer, plasma steam air heater are fallen as hot blast adjustment
Door；After coal pulverizer is stable, oil gun operation is progressively exited, until removing oil gun operation entirely；
Gradually increase coal amount, progressively rise parameter to steam turbine red switch condition, rolling parameter requires to meet steam turbine cold start pair
The requirement of parameter.
Preferably, in above-mentioned startup method, also include：
The main vapour that puts into operation supplies gland seal system, sets up steam exhaust device vacuum.
Preferably, in above-mentioned startup method, the main vapour that puts into operation supplies gland seal system, sets up steam exhaust device vacuum, including：
Before ignition of the boiler, start a vavuum pump and vacuumize, make unit vacuum maintain -28Kpa；
After ignition of the boiler, when it is 130 DEG C that main vapour pressure reaches 0.25MPa, Stream temperature degree, axle envelope system is supplied to the main vapour
System heating coil is hydrophobic；
After heating coil terminates, when main vapour pressure reaches 0.4MPa, put into main vapour and supply shaft seal steam source, the main vapour of standard-sized sheet to adjust for axle envelope
Valve, axle envelope is hydrophobic to be adjusted to press interruption unlatching height, intermediate pressure cylinder axle envelope filter screen sewage door hydrophobic；
With the rising of main vapour pressure and shaft seal steam main-piping pressure, during main steam supplies shaft seal steam source, axle envelope is adjusted
Header vapor pressure；
When condenser vacuum is gradually increased to -60KPa, the electrically operated gate of the low bypath system of machine is opened, close the reheater
To idle discharge vapour.
The subcritical Direct Air-cooled Unit cold start method that the present invention is provided, including：Elementary generator group boiler prepares,
The boiler is made to reach default steam supply condition；Boiler steams and sets up system pressure；Output steam input main steam is supplied into axle envelope
System carries out heating coil, and puts into turbine shaft seal, to set up unit vacuum；Auxiliary vapour system put into again carry out output is cold heating coil,
And put into deaerating heater and furnace bottom heating.This cold start method provided using the present invention, using new control mode
And method of work, after boiler produces steam.No longer unit operation is directly driven by boiler, but first carry out main steam and supply axle
The heating coil of envelope system, to turbine shaft gland sealing steam supply, be that the operation of unit provides in advance suitable running environment；And it is auxiliary to carry out input
Vapour system carries out heating coil, and puts into the operation of deaerating heater and furnace bottom heating to aid in the startup of unit, this startup side
Formula scheme compared to existing technology adopts new boiler steam supply and working method, it is no longer necessary to external auxiliary source of the gas, directly
Pipeline heating coil is introduced into advance by itself supply steam, the effect with cleaning removal of impurities is prevented from impurity and enters steam turbine, carries
The operating efficiency of equipment is risen, the energy consumption needed for reducing startup stage efficiently solves generation current unit and carries out Asia and faces
Need separately to arrange starting trouble during the full cold start of boundary's Direct Air-cooled Unit, cause operation and maintenance cost higher, and increase
Plus the problems such as environmental pollution.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of subcritical Direct Air-cooled Unit cold start method provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the invention discloses a kind of subcritical Direct Air-cooled Unit cold start method, to solve generation current machine
Group carries out needing separately to arrange starting trouble during the full cold start of subcritical Direct Air-cooled Unit, cause operation and maintenance cost compared with
Height, and the problems such as increase environmental pollution.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is referred to, Fig. 1 is the flow process of subcritical Direct Air-cooled Unit cold start method provided in an embodiment of the present invention
Schematic diagram.
The subcritical Direct Air-cooled Unit cold start method that embodiments of the invention are provided, including：S01：Unit generates electricity
Unit boiler prepares, and makes the boiler reach default steam supply condition；S02：Boiler steams and sets up system pressure；S03：By output
Steam input main steam carries out heating coil for gland seal system, and puts into turbine shaft seal, to set up unit vacuum；S04：Output is cold
Putting into auxiliary vapour system again carries out heating coil, and puts into deaerating heater and furnace bottom heating.
This cold start method provided using the present embodiment, using new control mode and method of work, in boiler
After producing steam.No longer unit operation is directly driven by boiler, but first carry out main steam for the heating coil of gland seal system, to vapour
Turbine shaft seal steam, is that the operation of unit provides in advance suitable running environment；And carry out putting into auxiliary vapour system and carry out heating coil, and
The operation of deaerating heater and furnace bottom heating is put into aid in the startup of unit, this Starting mode side compared to existing technology
Case adopts new boiler steam supply and working method, it is no longer necessary to external auxiliary source of the gas, directly pre- by itself supply steam
Pipeline heating coil is introduced into, the effect with cleaning removal of impurities is prevented from impurity and enters steam turbine, improves the work effect of equipment
Rate, the energy consumption needed for reducing startup stage, efficiently solving generation current unit, to carry out subcritical Direct Air-cooled Unit complete
Need separately to arrange starting trouble during cold start, the problems such as causing operation and maintenance cost higher, and increase environmental pollution.
It is preferred on the basis of above-described embodiment further to optimize above-mentioned technical proposal, in above-mentioned startup method, institute
Preparation boiler is stated, it is described to make the boiler reach default steam supply condition, including：
Start water pump to boiler water filling, rinse boiler certain hour；
The feedwater flow of control boiler and time, make the up-draft gasifier of drum less than 40 DEG C, steam water-level reaches ﹣
50mm。
It is preferred on the basis of above-described embodiment further to optimize above-mentioned technical proposal, in above-mentioned startup method, institute
State boiler and steam and set up system pressure, including：
Prepare and debug spike cooling system；
Whole valves that drum, superheater, reheater lead to emptying are opened, steam drain valve is adjusted, pot is controlled
Stove 5% starts hydrophobic；
Recover fuel system, start an oil pump, charge oil pressure is controlled in 3.0Mpa-3.2Mpa, including endpoint value.
It is preferred on the basis of above-described embodiment further to optimize above-mentioned technical proposal, in above-mentioned startup method, institute
State boiler and steam and set up system pressure, also include：
Start the first air-introduced machine, and run first and second pressure fan, make the total blast volume of the boiler is carried out for 400t/h
Burner hearth soot blowing；
Condensate system of resuming operation and vacuum system, start vavuum pump, and unit vacuum is evacuated to more than -28Kpa；
The total blast volume is gradually reduced to 246t/h；
Start the boiler.
It is preferred on the basis of above-described embodiment further to optimize above-mentioned technical proposal, in above-mentioned startup method, institute
State boiler and steam and set up system pressure, also include：
Oil gun and cigarette temperature probe are put into predeterminated position in the burner hearth of the boiler, is entered using air preheater supply pulse acetylene
The continuous soot blowing of row.
In the technical scheme that the present embodiment is provided, a set of soot blower system is further specially provided with, by air preheater pulse
Acetylene combustion gas soot blowing, can take away the remaining coal dust in boiler, prevent coal powder second burning from causing equipment deformation to cause to stop transport.
It is preferred on the basis of above-described embodiment further to optimize above-mentioned technical proposal, in above-mentioned startup method, institute
State boiler and steam and set up system pressure, also include：
Unit high pressure turbine by pitch aperture is adjusted into 50%, the steam isolating door of the spike cooling system is opened, is condensed
Water electrically operated gate, electrically operated gate is vacuumized, open specified valve of the final reheater to idle discharge vapour, prevent the reheater tube wall from surpassing
Temperature；
Low pressure cylinder spray valve is opened, steam exhaust device pressure is monitored, when condensing water temperature reaches 45 DEG C, is strengthened to condenser
Change water；And monitor that body expands drain temperature, open body and dredge according to water temperature condition adaptability and expand desuperheat water valve；
When the pressure of the drum reaches 0.15MPa, furnace side superheater emptying manually operated door, drum emptying door are closed electronic
Door, and in boiler of increasing input specified location angle oil gun.
It is preferred on the basis of above-described embodiment further to optimize above-mentioned technical proposal, in above-mentioned startup method, institute
State and output steam is put into heating coil of the main steam for gland seal system, and put into turbine shaft seal, to set up unit vacuum, including：
When main vapour pressure 0.24Mpa, temperature are 133 DEG C, output steam input main steam is carried out into heating coil for gland seal system；
During the cold 0.3Mpa of pressure again, by steam put into it is cold again for auxiliary vapour system, auxiliary vapour for oxygen-eliminating device system, auxiliary vapour for etc. from
Sub- steam air heater system starts heating coil.
It is preferred on the basis of above-described embodiment further to optimize above-mentioned technical proposal, in above-mentioned startup method, institute
State and output steam is put into heating coil of the main steam for gland seal system, and put into turbine shaft seal, to set up unit vacuum, also wrap
Include：
When unit vacuum reaches -62.5Kpa, by the low bypath system operation of output steam input machine, the reheater is closed
Electrically operated gate to idle discharge vapour；
Start seal fan, the first primary air fan, the second primary air fan and the second air-introduced machine successively.
When it is 181 DEG C that auxiliary vapour header pressure reaches 0.77Mpa, temperature, steam is put into the auxiliary vapour for oxygen-eliminating device system
System and the auxiliary vapour supply plasma steam air heater system；
The row air cooling blower fan of startup first, second, third and the 4th；
When pulverizer outlet temperature reaches 70 DEG C, start coal pulverizer, make it run in minimum coal amount, Boiler pressure control is in 40t/
h-50t/h；
Preferred technical scheme is to strengthen hearth combustion, the monitoring of each portion's cigarette temperature, adjustment, on the spot flame-observing hole observation during this period
Hearth combustion situation, it is ensured that flameholding, prevents furnace puff, back-end ductwork accumulated powder from burning again.
When the air preheater outlet temperature rises to 140 DEG C, the coal pulverizer, plasma steam air heater are fallen as hot blast adjustment
Door；After coal pulverizer is stable, oil gun operation is progressively exited, until removing oil gun operation entirely；
After coal pulverizer is stable, gradually increase coal amount, progressively rise parameter to steam turbine red switch condition, rolling parameter is required
Meet requirement of the steam turbine cold start to parameter.
Preferred technical scheme is that at least to put into two oil guns of respective layer in stove before set grid-connection stable, starts second
Coal pulverizer, feeder operation, after generator connecting in parallel with system, unit load increases to 30MW and exits oil gun operation by propping up.
Further unit progressively load up to 80MW, warming-up 30 minutes, period will feed water by bypass down to main road operation,
Station service is become into tape splicing by the standby paramount factory of switching that becomes is opened, and starts the operation of the 3rd coal pulverizer, after 80MW load warming-ups terminate, quickly
Load up is to 175MW.
For further optimization above-mentioned technical proposal, in above-mentioned startup method, go back on the basis of above-described embodiment preferably
Including：
The main vapour that puts into operation supplies gland seal system, sets up steam exhaust device vacuum.
It is preferred on the basis of above-described embodiment further to optimize above-mentioned technical proposal, in above-mentioned startup method, institute
State the main vapour that puts into operation and supply gland seal system, set up steam exhaust device vacuum, including：
Before ignition of the boiler, start a vavuum pump and vacuumize, make unit vacuum maintain -28Kpa；
After ignition of the boiler, when it is 130 DEG C that main vapour pressure reaches 0.25MPa, Stream temperature degree, axle envelope system is supplied to the main vapour
System heating coil is hydrophobic；
After heating coil terminates, when main vapour pressure reaches 0.4MPa, put into main vapour and supply shaft seal steam source, the main vapour of standard-sized sheet to adjust for axle envelope
Valve, axle envelope is hydrophobic to be adjusted to press interruption unlatching height, intermediate pressure cylinder axle envelope filter screen sewage door hydrophobic；
With the rising of main vapour pressure and shaft seal steam main-piping pressure, during main steam supplies shaft seal steam source, axle envelope is adjusted
Header vapor pressure；
When condenser vacuum is gradually increased to -60KPa, the electrically operated gate of the low bypath system of machine is opened, close the reheater
To idle discharge vapour.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (10)
1. a kind of subcritical Direct Air-cooled Unit cold start method, it is characterised in that include：
Elementary generator group boiler prepares, and makes the boiler reach default steam supply condition；
Boiler steams and sets up system pressure；
Output steam input main steam is carried out into heating coil for gland seal system, and puts into turbine shaft seal, to set up unit vacuum；
Cold by output puts into again auxiliary vapour system and carries out heating coil, and put into deaerating heater and furnace bottom heating.
2. startup method according to claim 1, it is characterised in that the preparation boiler, it is described to make the boiler reach
Default steam supply condition, including：
Start water pump to boiler water filling, rinse boiler certain hour；
The feedwater flow of control boiler and time, make the up-draft gasifier of drum less than 40 DEG C, steam water-level reaches ﹣ 50mm.
3. startup method according to claim 2, it is characterised in that the boiler steams and sets up system pressure, including：
Prepare and debug spike cooling system；
Whole valves that drum, superheater, reheater lead to emptying are opened, steam drain valve is adjusted, boiler 5% is controlled
Start hydrophobic；
Recover fuel system, start an oil pump, charge oil pressure is controlled in 3.0Mpa-3.2Mpa, including endpoint value.
4. startup method according to claim 3, it is characterised in that the boiler steams and sets up system pressure, also includes：
Start the first air-introduced machine, and run first and second pressure fan, make the total blast volume of the boiler carries out burner hearth for 400t/h
Soot blowing；
Condensate system of resuming operation and vacuum system, start vavuum pump, and unit vacuum is evacuated to more than -28Kpa；
The total blast volume is gradually reduced to 246t/h；
Start the boiler.
5. startup method according to claim 4, it is characterised in that the boiler steams and sets up system pressure, also includes：
Oil gun and cigarette temperature probe are put into predeterminated position in the burner hearth of the boiler, is connected using air preheater supply pulse acetylene
Continuous soot blowing.
6. startup method according to claim 5, it is characterised in that the boiler steams and sets up system pressure, also includes：
Unit high pressure turbine by pitch aperture is adjusted into 50%, the steam isolating door of the spike cooling system is opened, is condensed water power
Dynamic door, electrically operated gate is vacuumized, open specified valve of the final reheater to idle discharge vapour, prevent the reheater overtemperature of tube wall；
Low pressure cylinder spray valve is opened, steam exhaust device pressure is monitored, when condensing water temperature reaches 45 DEG C, reinforcement is changed condenser
Water；And monitor that body expands drain temperature, open body and dredge according to water temperature condition adaptability and expand desuperheat water valve；
When the pressure of the drum reaches 0.15MPa, furnace side superheater emptying manually operated door, drum emptying door electrically operated gate are closed,
And in boiler of increasing input specified location angle oil gun.
7. startup method according to claim 6, it is characterised in that described that output steam input main steam is supplied into axle envelope system
The heating coil of system, and turbine shaft seal is put into, to set up unit vacuum, including：
When main vapour pressure 0.24Mpa, temperature are 133 DEG C, output steam input main steam is carried out into heating coil for gland seal system；
During the cold 0.3Mpa of pressure again, steam is put into and cold is warmed up for plasma for oxygen-eliminating device system, auxiliary vapour for auxiliary vapour system, auxiliary vapour again
Wind device system starts heating coil.
8. startup method according to claim 7, it is characterised in that described that output steam input main steam is supplied into axle envelope system
The heating coil of system, and turbine shaft seal is put into, to set up unit vacuum, also include：
When unit vacuum reaches -62.5Kpa, by the low bypath system operation of output steam input machine, the reheater is closed to sky
The electrically operated gate of steam discharge；
Start seal fan, the first primary air fan, the second primary air fan and the second air-introduced machine successively；
When auxiliary vapour header pressure reach 0.77Mpa, temperature for 181 DEG C when, steam is put into the auxiliary vapour for oxygen-eliminating device system and
The auxiliary vapour supplies plasma steam air heater system；
The row air cooling blower fan of startup first, second, third and the 4th；
When pulverizer outlet temperature reaches 70 DEG C, start coal pulverizer, make it run in minimum coal amount, Boiler pressure control is in 40t/h-
50t/h；
When the air preheater outlet temperature rises to 140 DEG C, the coal pulverizer, plasma steam air heater are adjusted into door for hot blast；Mill
After coal machine is stable, oil gun operation is progressively exited, until removing oil gun operation entirely；
Gradually increase coal amount, progressively rise parameter to steam turbine red switch condition, rolling parameter requires to meet steam turbine cold start to parameter
Requirement.
9. startup method according to claim 8, it is characterised in that also include：
The main vapour that puts into operation supplies gland seal system, sets up steam exhaust device vacuum.
10. startup method according to claim 9, it is characterised in that the main vapour that puts into operation supplies gland seal system, sets up steam discharge
Device vacuum, including：
Before ignition of the boiler, start a vavuum pump and vacuumize, make unit vacuum maintain -28Kpa；
It is warm for gland seal system to the main vapour when it is 130 DEG C that main vapour pressure reaches 0.25MPa, Stream temperature degree after ignition of the boiler
Pipe is hydrophobic；
After heating coil terminates, when main vapour pressure reaches 0.4MPa, put into main vapour and supply shaft seal steam source, the main vapour of standard-sized sheet to adjust valve, axle for axle envelope
Envelope is hydrophobic to be adjusted to press interruption unlatching height, intermediate pressure cylinder axle envelope filter screen sewage door hydrophobic；
With the rising of main vapour pressure and shaft seal steam main-piping pressure, during main steam supplies shaft seal steam source, shaft seal steam is adjusted
Main-piping pressure；
When condenser vacuum is gradually increased to -60KPa, the electrically operated gate of the low bypath system of machine is opened, close the right of the reheater
Idle discharge vapour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611262882.4A CN106640235A (en) | 2016-12-30 | 2016-12-30 | Subcritical direct air cooling unit cold starting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611262882.4A CN106640235A (en) | 2016-12-30 | 2016-12-30 | Subcritical direct air cooling unit cold starting method |
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| CN108692308A (en) * | 2018-06-07 | 2018-10-23 | 北京能源集团有限责任公司 | A kind of startup control method of power station dum boiler |
| CN108716666A (en) * | 2018-06-20 | 2018-10-30 | 华润电力（渤海新区）有限公司 | A kind of hot purging method of super critical boiler system and system |
| CN109539223A (en) * | 2018-11-27 | 2019-03-29 | 国投北部湾发电有限公司 | A kind of 320MW fired power generating unit is started without the cold start method of boiler |
| CN109539232A (en) * | 2018-10-24 | 2019-03-29 | 大唐陕西发电有限公司 | A kind of upper water method when unit starting |
| CN110131002A (en) * | 2018-02-09 | 2019-08-16 | 上海明华电力技术工程有限公司 | Subcritical Units senior school biology control method based on environmental objective |
| CN111042882A (en) * | 2019-12-17 | 2020-04-21 | 广州中电荔新电力实业有限公司 | Single machine cold state starting method without auxiliary steam source |
| CN111059523A (en) * | 2019-12-31 | 2020-04-24 | 新疆生产建设兵团第八师天山铝业股份有限公司 | Cold-state starting method for unit |
| CN112343678A (en) * | 2020-11-05 | 2021-02-09 | 华能国际电力股份有限公司玉环电厂 | Starting control method of thermal power generating unit |
| CN113431646A (en) * | 2021-07-02 | 2021-09-24 | 华能巢湖发电有限责任公司 | Auxiliary-steam-free isolated thermal state starting method for condensing type external heat supply unit |
| CN114934828A (en) * | 2022-05-13 | 2022-08-23 | 华电电力科学研究院有限公司 | Operation method based on supercritical reheating type double-extraction heat supply backpressure unit system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110131002A (en) * | 2018-02-09 | 2019-08-16 | 上海明华电力技术工程有限公司 | Subcritical Units senior school biology control method based on environmental objective |
| CN108692308A (en) * | 2018-06-07 | 2018-10-23 | 北京能源集团有限责任公司 | A kind of startup control method of power station dum boiler |
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| CN108716666B (en) * | 2018-06-20 | 2023-11-10 | 华润电力（渤海新区）有限公司 | Thermal state flushing method and system for supercritical boiler system |
| CN109539232A (en) * | 2018-10-24 | 2019-03-29 | 大唐陕西发电有限公司 | A kind of upper water method when unit starting |
| CN109539223B (en) * | 2018-11-27 | 2020-04-21 | 国投北部湾发电有限公司 | Cold-state starting method for 320MW thermal power generating unit without starting boiler |
| CN109539223A (en) * | 2018-11-27 | 2019-03-29 | 国投北部湾发电有限公司 | A kind of 320MW fired power generating unit is started without the cold start method of boiler |
| CN111042882A (en) * | 2019-12-17 | 2020-04-21 | 广州中电荔新电力实业有限公司 | Single machine cold state starting method without auxiliary steam source |
| CN111059523A (en) * | 2019-12-31 | 2020-04-24 | 新疆生产建设兵团第八师天山铝业股份有限公司 | Cold-state starting method for unit |
| CN111059523B (en) * | 2019-12-31 | 2022-02-18 | 新疆生产建设兵团第八师天山铝业股份有限公司 | Cold-state starting method for unit |
| CN112343678A (en) * | 2020-11-05 | 2021-02-09 | 华能国际电力股份有限公司玉环电厂 | Starting control method of thermal power generating unit |
| CN113431646A (en) * | 2021-07-02 | 2021-09-24 | 华能巢湖发电有限责任公司 | Auxiliary-steam-free isolated thermal state starting method for condensing type external heat supply unit |
| CN114934828A (en) * | 2022-05-13 | 2022-08-23 | 华电电力科学研究院有限公司 | Operation method based on supercritical reheating type double-extraction heat supply backpressure unit system |
| CN114934828B (en) * | 2022-05-13 | 2023-08-22 | 华电电力科学研究院有限公司 | Method for putting supercritical reheating type double-pumping heat supply back pressure unit system into operation |
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Application publication date: 20170510 |