CN107120149B - The method and system of newly-built supercritical unit is debugged using external activated vapor - Google Patents
The method and system of newly-built supercritical unit is debugged using external activated vapor Download PDFInfo
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- CN107120149B CN107120149B CN201710567216.XA CN201710567216A CN107120149B CN 107120149 B CN107120149 B CN 107120149B CN 201710567216 A CN201710567216 A CN 201710567216A CN 107120149 B CN107120149 B CN 107120149B
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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
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
Abstract
The invention discloses a kind of method and systems that newly-built supercritical unit is debugged using external activated vapor, by operation unit height and it is cold again between install the first isolating door additional, by operation unit height and it is cold again between distance piece install contact pipeline additional, communicating door is set on contact pipeline, by newly-built supercritical unit is high and it is cold again between install the second isolating door additional；The first isolating door is closed, communicating door is opened, passes through the high other external steam to the offer of newly-built supercritical unit after pressure and temperature reducing of operation unit；Superheater and connecting pipe are purged using external steam pressure-reducing, decompression purging reheater steady using external steam and connecting pipe；Carry out newly-built Supercritical Pressure Steam Turbine the whole series Start-up and Adjustment.The present invention is in the case where new-built unit boiler misfires, the external steam provided using operation unit, the debugging efforts for completing unit steam-line blowing and a whole set of starting airport logistic park test run stage reduce the number of ignition of the boiler and the time in " non-economy area " operation in supercritical unit.
Description
Technical field
It is the present invention relates to firepower Thermal generation unit field, in particular to a kind of to debug newly-built surpass using external activated vapor
The method and system of criticality benchmark.
Background technique
Supercritical unit is created in blowpipe and airport logistic park test run stage, large number of equipment needs repeatedly starting and stopping, and boiler circuit needs anti-
Multiple to rinse, boiler is in oily coal multifuel combustion or the combustion-supporting underload of plasma, inefficient operating condition for a long time, to power plant in capital construction cost
It poses a big pressure in terms of environmental protection.
Existing new-built unit Start-up and Adjustment method has: one, the Start-up and Adjustment of most of supercritical units is all according to list
The thinking of first unit sequentially completes hot flushing, steam-line blowing, steam turbine red switch, electrical examination by ignition of the boiler produced vapor
It tests, the Start-up and Adjustments project such as generator connecting in parallel with system on-load, external steam is only used as auxiliary steam source；Two, small part power plant increases
The system for extracting the cold heating of the steam again water supply of adjacent machine realizes boiler and misfires and completes the hot flushing work of supercritical unit
Make, there is good energy conservation and environmental benefit, but because the cold amount of steam extraction again is limited, steam parameter cannot be adjusted flexibly, and be unable to satisfy more
The needs of more test run operating conditions.
Therefore, in the case where new-built unit boiler misfires, the external steam how to be provided using operation unit is complete
It is still technical problem to be solved at the debugging efforts of supercritical unit steam-line blowing and a whole set of starting airport logistic park test run stage.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, newly-built surpass is debugged using external activated vapor the present invention provides a kind of
The method and system of criticality benchmark utilizes the external steaming of the offer of operation unit in the case where new-built unit boiler misfires
Vapour completes the debugging efforts of unit steam-line blowing and a whole set of starting airport logistic park test run stage, reduces boiler in supercritical unit
The number of igniting and the time run in " non-economy area ", there is very big economical and environmentally friendly benefit.
The technical scheme adopted by the invention is that:
A method of newly-built supercritical unit is debugged using external activated vapor, comprising the following steps:
Step 1: operation unit high pressure bypass valve and it is cold again between install the first isolating door additional on pipeline, it is high in operation unit
Press bypass valve and it is cold again between distance piece install contact pipeline additional, communicating door is set on the contact pipeline, the pipeline of getting in touch with
End connects the cold pipeline again of newly-built supercritical unit, newly-built supercritical unit high pressure bypass valve and it is cold again between install additional on pipeline
Second isolating door；
Step 2: closing the first isolating door, opens communicating door, is provided to newly-built supercritical unit through throwing by operation unit
Main steam after producing unit high pressure bypass valve pressure and temperature reducing, using the main steam as the external steam of newly-built supercritical unit；
Step 3: using external steam pressure-reducing purging superheater and connecting pipe, until it is qualified to practice shooting；Superheater purging closes
After lattice, decompression purging reheater steady using external steam and connecting pipe, until it is qualified to practice shooting；
Step 4: newly-built Supercritical Pressure Steam Turbine the whole series Start-up and Adjustment is carried out.
Further, in the step 3, superheater and connecting pipe detailed process are purged using external steam pressure-reducing are as follows:
The spool for extracting newly-built supercritical unit high pressure bypass valve makes newly-built supercritical unit high pressure bypass valve be in connection state, closes
It closes the second isolating door, to water valve and face chongmen, external steam is by newly-built supercritical unit high pressure turbine by through superheater, separation
Device, water-cooling wall, economizer reversely charging vapour in front of the door, after external steam parameter meets preset blowpipe condition, close contact to water supply
Chongmen is faced in door, unlatching, to superheater and connecting pipe decompression purging, until it is qualified to practice shooting.
Further, in the step 3, the detailed process of reheater and connecting pipe is purged using external steam pressure-reducing
Are as follows: after superheater purging is qualified, external steam by newly-built supercritical unit high pressure turbine by through superheater, separator, water-cooling wall,
Economizer reversely charging vapour in front of the door, after external steam parameter meets preset blowpipe condition, closes communicating door, opens second to water supply
Isolating door, to reheater and connecting pipe decompression purging, until it is qualified to practice shooting.
Further, in the step 3, the detailed process of reheater and connecting pipe is purged using external steam pressure stabilizing
Are as follows: after superheater purging is qualified, restore the spool of newly-built supercritical unit high pressure bypass valve, and it is high to close newly-built supercritical unit
Bypass valve is pressed, the second isolating door and communicating door are opened, external steam parameter is controlled by operation unit high pressure bypass valve, to reheating
Device and connecting pipe pressure stabilizing purging, until it is qualified to practice shooting.
Further, in the step 4, the detailed process of Supercritical Pressure Steam Turbine the whole series Start-up and Adjustment is created are as follows:
Step 4.1: boiler thermal-state rinses and Air-Cooling Island rinses；
Step 4.2: steam turbine red switch；
Step 4.3: carrying out electrical test and auxiliary Power switching test before set grid-connection；
Step 4.4: low-pressure heater, No. 2 high-pressure heaters, No. 3 high-pressure heaters are tried to shoot and rinsed；
Step 4.5: carrying out the overspeed test and the verification of reheater safety door of steam turbine.
Further, in the step 4.1, the detailed process of boiler thermal-state flushing are as follows:
(1) the first isolating door and communicating door are opened, provides cold steam again to newly-built supercritical unit by operation unit；
(2) the second isolating door in newly-built supercritical unit is opened, provides steam to reheater and cold user again；
(3) open it is cold provide steam to auxiliary vapour header again, then provide steam to oxygen-eliminating device by auxiliary vapour header, by water supply plus
Heat is to 100 DEG C or more；
(4) steam is provided to axle envelope by auxiliary vapour header, establishes unit vacuum；
(5) unlatching is cold provides steam to high-pressure heater again, and water supply is heated to 190 DEG C or more, is carried out to boiler hot
It rinses, until water quality meets preset hot flushing acceptance condition；
The detailed process that Air-Cooling Island rinses are as follows:
(1) the first isolating door is closed, communicating door is opened, operation unit is provided to newly-built supercritical unit through operation unit
External steam after high pressure bypass valve pressure and temperature reducing；
(2) the second isolating door of new-built unit is opened, to auxiliary vapour header steam supply and unit vacuum is established, drops condenser pressure
As low as 15kPa or less；
(3) condensing system is introduced steam by low voltage bypass valve, starts to carry out Air-Cooling Island flushing；
(4) when the content of solid suspension reaches specified value 10ppm, and is intended to be further reduced, stop cleaning.
Further, in the step 4.2, the detailed process of steam turbine red switch are as follows:
(1) steam is provided to new-built unit reheater by operation unit high pressure bypass valve, by creating supercritical unit
Low voltage bypass valve adjustment reheater steam parameter meets the requirement of intermediate pressure cylinder start-up；
(2) steam turbine is started by operator's automated manner；
(3) steam turbine friction checks；
(4) medium-speed warming；
(5) after medium-speed warming, raising speed rate and rotating speed of target, steam turbine is selected to start raising speed, reaches and sets in turbine speed
When definite value, checks that confirmation jacking(oil) pump is automatically stopped, otherwise stop manually；
(6) when turbine speed rises to setting value, warming-up is simultaneously checked comprehensively；
(7) adjustment of oil pressure and main oil pump switching tests, oil filler test are lubricated, after pass the test, before doing set grid-connection
Test.
Further, in the step 4.4, low-pressure heater, No. 2 high-pressure heaters, No. 3 high-pressure heaters trial throw and
The detailed process of flushing are as follows:
(1) when unit medium-speed warming, each low-pressure heater is put into order；
(2) low-pressure heater emergency drain valve is opened, thrown low-pressure heater steam extraction non-return flap is opened, slightly opens thrown low add
Steam extraction electrically operated gate pre-warm is low to be added, and controls low plus leaving water temperature change rate less than 2 DEG C/min；
(3) slowly standard-sized sheet is low plus steam extraction electrically operated gate, the forward and backward drain valve of inspection steam extraction electrically operated gate are closed, and opens continuous exhaust pneumatic wallop
Valve, closes starting exhaust valve, and the normal hydrophobic investment of each heater is automatic；
(4) after unit load maintains 20% or so, prepare to put into No. 2 high-pressure heaters, No. 3 hyperbaric heatings in order
Device；
(5) check open No. 3 high-pressure heaters steam extraction non-return flap, extraction line draining valve, slightly open steam extraction motor-driven valve into
Horizontal high voltage heater warms up body, and control is high plus exit water temperature raising speed rate is not more than 2 DEG C/min；
(6) No. 3 high-pressure heaters are opened and starts exhaust valve, starting exhaust valve is closed when exhaust outlet has vapour discharge, is paid attention to
No. 3 high-pressure heater continuous exhaust pneumatic wallop valves are opened in the variation of unit vacuum；
(7) when exit water temperature tends towards stability, big steam extraction motor-driven valve is gradually opened until standard-sized sheet, adds normal hydrophobic adjusting for height
Valve and accident drain regulating valve investment " automatic ", notice that each hydrophobic valve events are normal, remain high plus water level is normal；
(8) investing method of No. 3 high-pressure heaters is pressed, then puts into No. 2 high-pressure heaters.
A kind of system for debugging newly-built supercritical unit using external activated vapor, including external steam steam-supplying system, institute
External steam steam-supplying system is stated for providing external steam to newly-built supercritical unit, including operation unit and creates overcritical machine
Group, operation unit include that operation unit high pressure bypass valve and operation unit are cold again；Newly-built supercritical unit is overcritical including creating
Unit high pressure bypass valve and newly-built supercritical unit are cold again；Between operation unit high pressure bypass valve and operation unit are cold again on pipeline
It is provided with the first isolating door, quantity of steam is adjusted by the first isolating door, it is cold again in operation unit high pressure bypass valve and operation unit
Between distance piece install contact pipeline additional, be provided with communicating door on the contact pipeline, the end connection of the contact pipeline creates
The cold pipeline again of supercritical unit, sets on pipeline between newly-built supercritical unit high pressure bypass valve and newly-built supercritical unit are cold again
It is equipped with the second isolating door.
It further, further include newly-built supercritical unit blow pipe system, the newly-built supercritical unit blow pipe system is used for
Blowpipe is carried out using external steam, including superheater, economizer, water-cooling wall, separator, reheater, to water valve and faces chongmen, institute
The entrance for stating superheater is connect by pipeline and boiler heating surface with to water valve, and the outlet of the superheater is overcritical by creating
The entrance of unit high pressure bypass valve and reheater, the connection of external steam outlet, the outlet of the superheater pass through pipeline and face
Chongmen connection, the chongmen that faces are connect with target plate；The outlet of the reheater passes through movable closure plate and connect with target plate, the target plate
The other end be connected with muffler.
Compared with prior art, the beneficial effects of the present invention are:
(1) present invention using external steam carry out blowpipe, it is desirable that blowpipe condition easily meet, eliminate ignition of the boiler and blow
The starting of large number of equipment and system needed for pipe, avoid between each system because progress it is different caused by largely coordinate problem, it is time saving,
Laborsaving, resource-saving.And really realize insulation blowpipe, enthalpy drop is fast, and blowpipe effect is good, bigger to double reheat power generation sets benefit；
(2) steam-line blowing of the invention and steam turbine the whole series Start-up and Adjustment stage are not necessarily to ignition of the boiler produced vapor, save
A large amount of fuel；
(3) supercritical boiler is under hygrometric state operating condition, and the quantity of steam emptied by activation system is very big, using outer
Carry out steam, reduces steam discharging loss, save a large amount of demineralized water；
(4) steam turbine red switch no longer needs the cooperation of boiler in the present invention, avoids coordination difficulty between the two, makes to rush
Turn that this is complicated and time-consuming work is more easily-controllable, more efficient；
(5) present invention realizes that station service is included, saves the cost of outsourcing station service before ignition of the boiler；Thoroughly avoid
Reheater dry combustion method easy overtemperature after ignition of the boiler is also easy to produce the problem of oxide skin falls off, and protects reheater, reduces solid
The generation that grain corrodes.
Detailed description of the invention
Fig. 1 is the flow chart of the method that newly-built supercritical unit is debugged using external activated vapor of the embodiment of the present invention；
Fig. 2 is the external steam steam-supplying system structural schematic diagram of the embodiment of the present invention；
Fig. 3 is the newly-built supercritical unit blow pipe system structural schematic diagram of the embodiment of the present invention；
Wherein, 1, operation unit, 2, newly-built supercritical unit, 3, operation unit high pressure bypass valve, 4, operation unit it is cold again,
5, create supercritical unit high pressure bypass valve, 6, newly-built supercritical unit it is cold again, the 7, first isolating door, the 8, second isolating door, 9,
Get in touch with pipeline, 10, communicating door, 11, external steam, 12, reheater, 13, economizer, 14, separator, 15, superheater, 16, water
Cold wall, 17, give water valve, 18, face chongmen, 19, target plate, 20, muffler, 21, main steam, 22, movable closure plate.
Specific embodiment
The following further describes the present invention with reference to the drawings.
Present embodiments provide a kind of system for debugging newly-built supercritical unit using external activated vapor, including external steaming
Vapour steam-supplying system and newly-built supercritical unit blow pipe system, wherein as shown in Fig. 2, the external steam steam-supplying system be used for
Newly-built supercritical unit provides external steam, including operation unit 1 and newly-built supercritical unit 2, operation unit include operation machine
Group high pressure bypass valve 3 and operation unit cold again 4, it includes newly-built supercritical unit high pressure bypass valve 5 and new for creating supercritical unit
Build supercritical unit cold again 6；Operation unit high pressure bypass valve is connect with external 11 conveyance conduit of steam, by operation unit high pressure
Road valve and operation unit it is cold again between be provided with the first isolating door 7 on pipeline, when making through operation unit high pressure bypass valve steam supply, steam
Vapour parameter can be with flexible modulation, without will affect reheated steam parameter；It is cold again in operation unit high pressure bypass valve and operation unit
Between distance piece install contact pipeline 9 additional, be provided with communicating door 10 on the contact pipeline, the head end for getting in touch with pipeline and operation
The cold pipeline again of unit connects, and the end of the contact pipeline connects the cold pipeline again of newly-built supercritical unit, is creating super face
Boundary's unit high pressure bypass valve and newly-built supercritical unit it is cold again between be provided with the second isolating door 8 on pipeline, when new-built unit is to neighbour
When machine steam supply, the second isolating door 8 have buffer action, the second isolating door 8 can also be played in newly-built supercritical unit blowpipe every
From valve and the effect for facing chongmen.
In the present embodiment, the first isolating door 7 is opened, communicating door 10 is opened, and operation unit high pressure bypass valve is closed, operation machine
Group can steam, evaporation capacity for engine can be adjusted by communicating door again to newly-built supercritical unit cooling supply；First isolating door 7 is closed, is got in touch with
Door 10 is opened, and operation unit high pressure bypass valve is opened, and operation unit can be to new-built unit for through operation unit high pressure bypass valve
Main steam 21 after pressure and temperature reducing, the external steam 11 by the main steam 21 as operation unit, evaporation capacity for engine is by new-built unit height
Pressure bypass valve regulation.
As shown in figure 3, the newly-built supercritical unit blow pipe system is used to carry out blowpipe, including overheat using external steam
Device 15, water-cooling wall 16, separator 14, reheater 12, to water valve 17 and faces chongmen 18 at economizer 13, and the superheater 15 enters
Mouth is connect by pipeline and boiler heating surface with to water valve, and the outlet of the superheater 15 is by creating by supercritical unit high pressure
Road valve 5 is connect with the entrance of reheater 12,11 conveyance conduit of external steam, and the outlet of the superheater 15 passes through pipeline and Lin Chong
Door 18 connects, and the chongmen 18 that faces is connect with target plate 19；The outlet of the reheater 12 passes through movable closure plate 22 and connects with target plate 19
It connects, the other end of the target plate 19 is connected with muffler 20.
As shown in Figure 1, present embodiment discloses a kind of method for debugging newly-built supercritical unit using external activated vapor,
Method includes the following steps:
Step 1: operation unit high pressure bypass valve and it is cold again between install the first isolating door additional on pipeline, in operation unit high pressure
Bypass valve and it is cold again between distance piece install contact pipeline additional, got in touch in the contact pipeline close to newly-built supercritical unit one end setting
The end of door, the contact pipeline connects the cold pipeline again of newly-built supercritical unit, in newly-built supercritical unit high pressure bypass valve
With it is cold again between install the second isolating door additional on pipeline.
Operation unit high pressure bypass valve and it is cold again between install the first isolating door additional on pipeline, make by by operation unit high pressure
When the valve steam supply of road, steam parameter can be with flexible modulation, without will affect reheated steam parameter；By newly-built supercritical unit high pressure
Road valve and it is cold again between install the second isolating door additional on pipeline, when new-built unit is to adjacent machine steam supply, have same as the first isolating door
Buffer action；Second isolating door can also play the role of isolating valve in new-built unit blowpipe and face chongmen.
Step 2: closing the first isolating door, open communicating door, provided to newly-built supercritical unit through throwing by operation unit
Main steam after producing the high pressure bypass valve pressure and temperature reducing of unit, using the external steam as the external steam for creating overcritical machine；
Wherein the quantity of steam of external steam can pass through the high pressure turbine by valve regulation of operation unit.
Step 3: carrying out blowpipe using external steam；
Step 3.1 purges superheater and connecting pipe in newly-built supercritical unit blow pipe system using external steam pressure-reducing
Detailed process are as follows: the spool for extracting newly-built supercritical unit high pressure bypass valve is in newly-built supercritical unit high pressure bypass valve
Connection state closes the second isolating door, to water valve and faces chongmen, and external steam passes through newly-built supercritical unit high pressure bypass valve warp
Superheater, separator, water-cooling wall, economizer reversely charging vapour to water supply in front of the door, when external steam parameter meets preset blowpipe condition
Afterwards, communicating door is closed, chongmen is faced in unlatching, to superheater and connecting pipe decompression purging, until it is qualified to practice shooting；
Step 3.2, decompression steady using external steam purge reheater and connecting tube in newly-built supercritical unit blow pipe system
Road；
Step 3.2.1, decompression purging reheater and connecting pipe have process are as follows: after superheater purging is qualified, external steaming
Vapour by newly-built supercritical unit high pressure bypass valve through superheater, separator, water-cooling wall, economizer reversely charging vapour to water supply in front of the door,
After external steam parameter meets preset blowpipe condition, communicating door is closed, the second isolating door is opened, to reheater and connecting tube
Road decompression purging, until it is qualified to practice shooting；
Step 3.2.2, pressure stabilizing purging reheater and connecting pipe detailed process are as follows: after superheater purging is qualified, restore new
Build the spool of supercritical unit high pressure bypass valve, and close newly-built supercritical unit high pressure bypass valve, open the second isolating door and
Communicating door controls external steam parameter by newly-built supercritical unit high pressure bypass valve, blows reheater and connecting pipe pressure stabilizing
It sweeps, until it is qualified to practice shooting.
In the present embodiment, using external steam-line blowing, it is desirable that blowpipe condition easily meet, eliminate ignition of the boiler blowpipe
The starting of required large number of equipment and system, avoid between each system because progress it is different caused by largely coordinate problem, it is time saving, save
Power, resource-saving, and really realize insulation blowpipe, enthalpy drop is fast, and blowpipe effect is good, bigger to double reheat power generation sets benefit.
Step 4: carrying out newly-built Supercritical Pressure Steam Turbine the whole series Start-up and Adjustment；
Step 4.1: boiler thermal-state rinses；
The detailed process that boiler thermal-state rinses are as follows:
Step 4.1.1: opening the first isolating door and communicating door, cold again to the offer of newly-built supercritical unit by operation unit
Steam；
Step 4.1.2: opening the second isolating door in newly-built supercritical unit, provides steam to reheater and cold user again；
Step 4.1.3: unlatching is cold to provide steam to auxiliary vapour header again, then provides steam to oxygen-eliminating device by auxiliary vapour header,
Water supply is heated to 100 DEG C or more；
Step 4.1.4: by auxiliary vapour header to shaft seal steam, unit vacuum is established；
Step 4.1.5: unlatching is cold to provide external steam to No. 2 high-pressure heaters again, further using external steam in height
Water supply is heated to 190 DEG C or more by heating water supply in pressure heater, carries out hot flushing to boiler, until water quality meet it is preset
Hot flushing acceptance condition.
Step 4.2: Air-Cooling Island rinses；
The detailed process that Air-Cooling Island rinses are as follows:
Step 4.2.1: closing the first isolating door, opens communicating door, and operation unit is provided to newly-built supercritical unit through throwing
External steam after producing the high pressure bypass valve pressure and temperature reducing of unit；
Step 4.2.2: the second isolating door of new-built unit is opened, to auxiliary vapour header steam supply and unit vacuum is established, makes condensing
Device pressure reduction is to 15kPa or less；
Step 4.2.3: introducing steam into condensing system by low voltage bypass valve, starts to carry out Air-Cooling Island flushing；First to nothing
The pipeline of steam discharge inlet valve is rinsed, and is then successively rinsed to the pipeline for having inlet valve, wherein quantity of steam about reaches
30%BMCR, condensing system pressure must not exceed 60kPa；
Step 4.2.4: when the content of solid suspension reaches specified value 10ppm, and is intended to be further reduced, stop
Cleaning.
Step 4.3: steam turbine red switch；
The detailed process of steam turbine red switch are as follows:
Step 4.3.1: steam is provided to newly-built supercritical unit reheater by operation unit high pressure bypass valve, by new
Build the requirement that supercritical unit low voltage bypass valve adjustment reheater steam parameter meets intermediate pressure cylinder start-up；
Step 4.3.2: steam turbine is started by operator's automated manner；
Step 4.3.3: when turbine speed is 500r/min, steam turbine friction is checked；
Step 4.3.4: after friction passed examination, when turbine speed is 1500r/min, medium-speed warming is carried out, when warming-up
Between about 240 minutes；
Step 4.3.5: after medium-speed warming, selecting raising speed rate and rotating speed of target, steam turbine to start raising speed, turns in steam turbine
When speed reaches setting value 2500r/min, checks that confirmation jacking(oil) pump is automatically stopped, otherwise stop manually；
Step 4.3.6: 3000r/min when turbine speed rises to setting value, warming-up 100 minutes is simultaneously checked comprehensively；
Step 4.3.7: being lubricated adjustment of oil pressure and main oil pump switching tests, oil filler test, after pass the test, does unit
Test before grid-connected.
In the present embodiment, steam turbine red switch process no longer needs the cooperation of boiler, avoids coordination difficulty between the two,
Making red switch, this is complicated and time-consuming work is more easily-controllable, more efficient.
Step 4.4: carrying out electrical test before set grid-connection；
The detailed process of electrical test before set grid-connection are as follows:
Step 4.4.1: after Turbo-generator Set constant speed 3000r/min, generator outlet short-circuit test, main transformer short circuit are carried out
Test, high factory become short-circuit test；
Step 4.4.2: main transformer no-load test；
Step 4.4.3: field regulator test；
Step 4.4.4: false contemporary trials；
Step 4.4.5: shield of insuring checks route, set grid-connection；
Step 4.5: auxiliary Power switching test；
The detailed process of auxiliary Power switching test are as follows:
Step 4.5.1: evaporation capacity for engine is adjusted by operation unit high pressure bypass valve, steps up unit load；
Step 4.5.2: unit load in the case where overtemperature, is not maintained 20% or so by monitoring Thrust-vectoring nozzle；
Step 4.5.3: auxiliary Power switching is self-powered to the machine.
In the present embodiment, realize that station service is included, saves the cost of outsourcing station service before making ignition of the boiler, the present invention
It thoroughly avoids the easy overtemperature of reheater dry combustion method after ignition of the boiler, be also easy to produce the problem of oxide skin falls off, protect reheater, reduce
The generation of solid particle erosion.
Step 4.6: low-pressure heater, No. 2 high-pressure heaters, No. 3 high-pressure heaters are tried to shoot and rinsed；
The detailed process that low-pressure heater, No. 2 high-pressure heaters, No. 3 high-pressure heaters are tried to shoot and rinsed are as follows:
Step 4.6.1: when unit medium-speed warming, each low-pressure heater is put into order；
Step 4.6.2: opening low-pressure heater emergency drain valve, opens thrown low-pressure heater steam extraction non-return flap, slightly opens
Throw low plus steam extraction electrically operated gate pre-warm it is low plus, control low plus leaving water temperature change rate less than 2 DEG C/min；
Step 4.6.3: slow standard-sized sheet is low plus steam extraction electrically operated gate, the forward and backward drain valve of inspection steam extraction electrically operated gate are closed, the company of unlatching
Continuous exhaust valve, closes starting exhaust valve, and the normal hydrophobic investment of each heater is automatic；
Step 4.6.4: after unit load maintains 20% or so, prepare to put into No. 3 high-pressure heaters, No. 2 height in order
Press heater；
Step 4.6.5: checking steam extraction non-return flap, the extraction line draining valve for opening No. 3 high-pressure heaters, slightly opens steam extraction electricity
Dynamic valve carries out high-pressure heater and warms up body, and control is high plus exit water temperature raising speed rate is not more than 2 DEG C/min；
Step 4.6.6: opening No. 3 high-pressure heaters and start exhaust valve, and starting steam discharge is closed when exhaust outlet has vapour discharge
Door, pays attention to the variation of unit vacuum, opens No. 3 high-pressure heater continuous exhaust pneumatic wallop valves；
Step 4.6.7: when exit water temperature tends towards stability, big steam extraction motor-driven valve is gradually opened until standard-sized sheet, height is added normal
Drain regulating valve and accident drain regulating valve investment " automatic ", notice that each hydrophobic valve events are normal, remain high plus water level is normal；
Step 4.6.8: pressing the investing method of No. 3 high-pressure heaters, then puts into No. 2 high-pressure heaters.
Step 4.7: carrying out the overspeed test of steam turbine；
The detailed process of the overspeed test of steam turbine are as follows:
Step 4.7.1: unit band 20% is specified or the above load operation is after 4 hours, gradually reduces load, unit trip,
Steam turbine maintains 3000r/min revolving speed；
Step 4.7.2:OPC test: when revolving speed reaches 3090r/min, OPC movement, high-pressure governing valve and middle pressure pitch are closed
It closes, revolving speed is then turned on when declining 3000r/min, and stabilization of speed is in 3000r/min；
Step 4.7.3: electric overspeed test: setting rotating speed of target 3310r/min, raising speed, when generating unit speed rises to 3300r/
When min, exceed the speed limit electromagnetism valve events, steam turbine tripping；
Step 4.7.4: steam turbine raising speed does mechanical overspeed protection control test；Movement rotating speed difference is no more than 18r/min twice, resets
Revolving speed should be greater than working speed.
Step 4.8: the verification of reheater safety door；
Reheater safety door verification detailed process be；
Step 4.8.1: adjustment reheater outlet pressure is that safety door plays the 70~80% of seat pressure, and pressure is kept to stablize；
Step 4.8.2: manual trial jump safety valve is secondary, checks safety valve steam discharge and hydrophobic whether unimpeded, expansion whether by
Resistance, and will damage outside the foreign debris blowout valve of valve；
Step 4.8.3: pressurizeing to oil pressure jump aid, and until safety valve is opened, record is pacified with the jump help of oil pressure jump aid
The pressure of hydraulic oil when full valve opens；
Step 4.8.4: the release pressure of safety valve is calculated.
The present invention use external steam-line blowing, it is desirable that blowpipe condition easily meet, eliminate needed for ignition of the boiler blowpipe
Large number of equipment and system starting, avoid between each system because progress it is different caused by largely coordinate problem, it is time saving, laborsaving,
Resource-saving, and really realize insulation blowpipe, enthalpy drop is fast, and blowpipe effect is good, bigger to double reheat power generation sets benefit.
The present invention is not necessarily to boiler using external steam-line blowing and newly-built Supercritical Pressure Steam Turbine the whole series Start-up and Adjustment stage
Igniting produced vapor, saves a large amount of fuel.
For usually newly-built supercritical boiler under hygrometric state operating condition, the quantity of steam emptied by activation system is very big,
The present invention reduces steam discharging loss, saves a large amount of demineralized water by rinsing to boiler thermal-state.
Steam turbine red switch process of the invention no longer needs the cooperation of boiler, avoids coordination difficulty between the two, makes
This is complicated and time-consuming work is more easily-controllable, more efficient for red switch.
The present invention realizes that station service is included, saves the cost of outsourcing station service before making ignition of the boiler.
The present invention thoroughly avoids the easy overtemperature of reheater dry combustion method after ignition of the boiler, is also easy to produce the problem of oxide skin falls off, and protects
Reheater has been protected, the generation of solid particle erosion is reduced.
After the present invention makes ignition of the boiler, fuel burns at " hot wind, hot stove ", without being maintained at oily coal for a long time
Multifuel combustion or the combustion-supporting underload of plasma, inefficient operating condition, this greatly reduces the discharges of pollutant.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (10)
1. a kind of system for debugging newly-built supercritical unit using external activated vapor, characterized in that including external steam steam supply
System and newly-built supercritical unit, the external steam steam-supplying system are used to provide external steam to newly-built supercritical unit, outside
Carrying out vapour system includes operation unit, and operation unit includes that operation unit high pressure bypass valve and operation unit are cold again；Create super face
Boundary's unit includes that newly-built supercritical unit high pressure bypass valve and newly-built supercritical unit are cold again；Operation unit high pressure bypass valve with
Operation unit it is cold again between be provided with the first isolating door on pipeline, quantity of steam is adjusted by the first isolating door, in operation unit high pressure
Bypass valve and operation unit it is cold again between distance piece install additional contact pipeline, distance piece be located at operation unit high pressure bypass valve in first every
It is located between newly-built supercritical unit high pressure bypass valve and the second isolating door from the end between door, getting in touch with pipeline, described
Communicating door is provided on network pipeline, the end of the contact pipeline connects the cold pipeline again of newly-built supercritical unit, newly-built super
Criticality benchmark high pressure bypass valve and newly-built supercritical unit it is cold again between be provided with the second isolating door on pipeline.
2. a kind of system for debugging newly-built supercritical unit using external activated vapor according to claim 1, feature
Being further includes newly-built supercritical unit blow pipe system, the newly-built supercritical unit blow pipe system be used for using external steam into
Row blowpipe, including superheater, economizer, water-cooling wall, separator, reheater, to water valve and face chongmen, the entrance of the superheater
It is connect by pipeline and boiler heating surface with to water valve, the outlet of the superheater is by creating supercritical unit high pressure bypass valve
It is connect with the entrance of reheater, external steam outlet, the outlet of the superheater is connect by pipeline with chongmen is faced, described to face
Chongmen is connect with target plate；The outlet of the reheater passes through movable closure plate and connect with target plate, and the other end of the target plate is connected with
Muffler.
3. a kind of method for debugging newly-built supercritical unit using external activated vapor, based on as claimed in claim 2 using outer
Carry out the system that activated vapor debugs newly-built supercritical unit to realize, characterized in that the following steps are included:
Step 1: closing the first isolating door, opens communicating door, is provided to newly-built supercritical unit through operation machine by operation unit
Main steam after group high pressure bypass valve pressure and temperature reducing, using the main steam as the external steam of newly-built supercritical unit；
Step 2: using external steam pressure-reducing purging superheater and connecting pipe, until it is qualified to practice shooting；Superheater purging is qualified
Afterwards, steady using external steam, decompression purging reheater and connecting pipe, until it is qualified to practice shooting；
Step 3: newly-built Supercritical Pressure Steam Turbine the whole series Start-up and Adjustment is carried out.
4. a kind of method for debugging newly-built supercritical unit using external activated vapor according to claim 3, feature
It is in the step 2, to purge superheater and connecting pipe detailed process using external steam pressure-reducing are as follows: extraction creates overcritical
The spool of unit high pressure bypass valve makes newly-built supercritical unit high pressure bypass valve be in connection state, closes the second isolating door, gives
Water valve and face chongmen, external steam by newly-built supercritical unit high pressure bypass valve through superheater, separator, water-cooling wall, save coal
Device reversely charging vapour in front of the door, after external steam parameter meets preset blowpipe condition, closes communicating door to water supply, and chongmen is faced in unlatching,
To superheater and connecting pipe decompression purging, until it is qualified to practice shooting.
5. a kind of method for debugging newly-built supercritical unit using external activated vapor according to claim 3, feature
It is that in the step 2, the detailed process of reheater and connecting pipe is purged using external steam pressure-reducing are as follows: superheater purging closes
After lattice, external steam is by newly-built supercritical unit high pressure bypass valve through superheater, separator, water-cooling wall, economizer reversely charging vapour
In front of the door to water supply, after external steam parameter meets preset blowpipe condition, communicating door is closed, the second isolating door is opened, to again
Hot device and connecting pipe decompression purging, until it is qualified to practice shooting.
6. a kind of method for debugging newly-built supercritical unit using external activated vapor according to claim 3, feature
It is that in the step 2, the detailed process of reheater and connecting pipe is purged using external steam pressure stabilizing are as follows: superheater purging closes
After lattice, restore the spool of newly-built supercritical unit high pressure bypass valve, and close newly-built supercritical unit high pressure bypass valve, opens the
Two isolating doors and communicating door control external steam parameter by operation unit high pressure bypass valve, steady to reheater and connecting pipe
Pressure purging, until it is qualified to practice shooting.
7. a kind of method for debugging newly-built supercritical unit using external activated vapor according to claim 3, feature
It is in the step 3, to create the detailed process of Supercritical Pressure Steam Turbine the whole series Start-up and Adjustment are as follows:
Step 4.1: boiler thermal-state rinses and Air-Cooling Island rinses；
Step 4.2: steam turbine red switch；
Step 4.3: carrying out electrical test and auxiliary Power switching test before set grid-connection；
Step 4.4: low-pressure heater, No. 2 high-pressure heaters, No. 3 high-pressure heaters are tried to shoot and rinsed；
Step 4.5: carrying out the overspeed test and the verification of reheater safety door of steam turbine.
8. a kind of method for debugging newly-built supercritical unit using external activated vapor according to claim 7, feature
It is, in the step 4.1, the detailed process of boiler thermal-state flushing are as follows:
(1) the first isolating door and communicating door are opened, provides cold steam again to newly-built supercritical unit by operation unit；
(2) the second isolating door in newly-built supercritical unit is opened, provides steam to reheater and cold user again；
(3) unlatching is cold provides steam to auxiliary vapour header again, then provides steam to oxygen-eliminating device by auxiliary vapour header, and water supply is heated to
100 DEG C or more；
(4) steam is provided to axle envelope by auxiliary vapour header, establishes unit vacuum；
(5) unlatching is cold provides steam to No. 2 high-pressure heaters again, and water supply is heated to 190 DEG C or more, carries out hot punching to boiler
It washes, until water quality meets preset hot flushing acceptance condition；
The detailed process that Air-Cooling Island rinses are as follows:
(1) the first isolating door is closed, communicating door is opened, operation unit provides the high pressure through operation unit to newly-built supercritical unit
External steam after bypass valve pressure and temperature reducing；
(2) the second isolating door of new-built unit is opened, to auxiliary vapour header steam supply and unit vacuum is established, is reduced to condenser pressure
15kPa or less；
(3) condensing system is introduced steam by low voltage bypass valve, starts to carry out Air-Cooling Island flushing；
(4) when the content of solid suspension reaches specified value 10ppm, and is intended to be further reduced, stop cleaning.
9. a kind of method for debugging newly-built supercritical unit using external activated vapor according to claim 7, feature
It is, in the step 4.2, the detailed process of steam turbine red switch are as follows:
(1) steam is provided to new-built unit reheater by operation unit high pressure bypass valve, by creating supercritical unit low pressure
Bypass valve adjustment reheater steam parameter meets the requirement of intermediate pressure cylinder start-up；
(2) steam turbine is started by operator's automated manner；
(3) steam turbine friction checks；
(4) medium-speed warming；
(5) after medium-speed warming, raising speed rate and rotating speed of target, steam turbine is selected to start raising speed, reaches setting value in turbine speed
When, it checks that confirmation jacking(oil) pump is automatically stopped, otherwise stops manually；
(6) when turbine speed rises to setting value, warming-up is simultaneously checked comprehensively；
(7) it is lubricated adjustment of oil pressure and main oil pump switching tests, oil filler test, after pass the test, is tested before doing set grid-connection.
10. a kind of method for debugging newly-built supercritical unit using external activated vapor according to claim 7, feature
Be, in the step 4.4, low-pressure heater, No. 2 high-pressure heaters, No. 3 high-pressure heaters trial throw and flushing detailed process
Are as follows:
(1) when unit medium-speed warming, each low-pressure heater is put into order；
(2) low-pressure heater emergency drain valve is opened, thrown low-pressure heater steam extraction non-return flap is opened, slightly opens thrown low plus steam extraction
Electrically operated gate pre-warm is low to be added, and controls low plus leaving water temperature change rate less than 2 DEG C/min；
(3) slowly standard-sized sheet is low plus steam extraction electrically operated gate, the forward and backward drain valve of inspection steam extraction electrically operated gate are closed, and opens continuous exhaust pneumatic wallop valve, closes
Starting exhaust valve is closed, the normal hydrophobic investment of each heater is automatic；
(4) after unit load maintains 20% or so, prepare to put into No. 2 high-pressure heaters, No. 3 high-pressure heaters in order；
(5) steam extraction non-return flap, the extraction line draining valve for opening No. 3 high-pressure heaters are checked, steam extraction motor-driven valve is slightly opened and carries out height
Heater is pressed to warm up body, control is high plus exit water temperature raising speed rate is not more than 2 DEG C/min；
(6) No. 3 high-pressure heaters are opened and starts exhaust valve, starting exhaust valve is closed when exhaust outlet has vapour discharge, pays attention to unit
No. 3 high-pressure heater continuous exhaust pneumatic wallop valves are opened in the variation of vacuum；
(7) when exit water temperature tends towards stability, gradually open big steam extraction motor-driven valve until standard-sized sheet, by height plus normal drain regulating valve and
Accident drain regulating valve puts into " automatic ", notices that each hydrophobic valve events are normal, remains high plus water level is normal；
(8) investing method of No. 3 high-pressure heaters is pressed, then puts into No. 2 high-pressure heaters.
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| CN107842843A (en) * | 2017-12-06 | 2018-03-27 | 中国大唐集团科学技术研究院有限公司华东分公司 | Supercritical unit voltage stabilizing steam-line blowing method for supplementing water and water charging system |
| CN108533335A (en) * | 2018-05-28 | 2018-09-14 | 华电莱州发电有限公司 | A kind of big bypass reheat unit neighbour machine heating system of level-one |
| 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 |
| CN111911252B (en) * | 2020-08-04 | 2024-04-02 | 福建省鸿山热电有限责任公司 | Supercritical heat supply unit and cold starting method thereof |
| CN112879890B (en) * | 2021-02-22 | 2022-08-19 | 西安热工研究院有限公司 | Automatic starting control method for whole process of coal-fired unit based on electric water feeding pump |
| CN113701138B (en) * | 2021-09-08 | 2023-05-05 | 杭州意能电力技术有限公司 | Automatic control method for depressurization blowpipe of boiler |
| CN114216114B (en) * | 2021-12-08 | 2023-07-28 | 西安热工研究院有限公司 | Supercritical once-through boiler quick start system heated by means of temporary boiler steam |
| CN114233406A (en) * | 2022-01-14 | 2022-03-25 | 西安热工研究院有限公司 | System and method for carrying out turbine running by utilizing external steam |
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