CN109441575A - The method of steam combined cycle power generating unit heat supply period heat network system operation - Google Patents
The method of steam combined cycle power generating unit heat supply period heat network system operation Download PDFInfo
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- CN109441575A CN109441575A CN201811153771.9A CN201811153771A CN109441575A CN 109441575 A CN109441575 A CN 109441575A CN 201811153771 A CN201811153771 A CN 201811153771A CN 109441575 A CN109441575 A CN 109441575A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000010438 heat treatment Methods 0.000 claims description 47
- 230000002209 hydrophobic effect Effects 0.000 claims description 22
- 239000003921 oil Substances 0.000 claims description 21
- 238000002485 combustion reaction Methods 0.000 claims description 19
- 239000002918 waste heat Substances 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 9
- 238000011161 development Methods 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 7
- 230000036760 body temperature Effects 0.000 claims description 6
- 238000012790 confirmation Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 239000008236 heating water Substances 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000003303 reheating Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000003134 recirculating effect Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims description 3
- 230000008034 disappearance Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 239000000567 combustion gas Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention relates to a kind of methods of gas-steam combined circulating generation unit heat supply period heat network system operation, pass through the control to high pressure turbine by and intermediate pressure by-pass valve, desuperheating water, steam parameter, give full play to the effect of steam turbine " high pressure turbine by " and " intermediate pressure by-pass ", high temperature and high pressure steam is set to pass through bypass " bypass " steam turbine, realize that 900MW grades of gas-steam combined cycle sets under the operating condition for cutting steam turbine entirely, are realized and carry out heat supply to heat supply network.The present invention solves the problems, such as that gas-steam combined cycle set steam turbine leads to not carry out safety and stability heat supply to heat supply network in heat supply period because cause specific (during capital construction do not complete the system debug of steam turbine whole, there are major defects to run for turbine system) can not be passed through high temperature and high pressure steam, operations staff is helped to cut off steam turbine in heat supply period " safety ", the safe and stable operation for gas-steam combined cycle set heat supply period heat network system provides technical support and reference.
Description
Technical field
The invention belongs to gas-steam combined cycle sets to be safely operated technical field, and especially a kind of Steam Combined is followed
The method of ring generating set heat supply period heat network system operation.
Technical background
Gas-steam Combined Cycle device (abbreviation combined cycle power plant) can combine the advantages of the two.It is followed
Ring had not only had the heating high temperature of gas turbine, but also the heat release low temperature with Steam Power Equipment, to have the higher thermal efficiency, greatly
Amplitude improves the thermal efficiency in thermal power plant, and pollution problem is made to achieve a solution, and promotes " clean combustion of coal ", is before having development
The generation technology on way.
The heat supply steam extraction of 900MW gas-steam combined cycle set heat supply period heat exchangers for district heating comes from extracted steam from turbine, mesh
Preceding there are no gas-steam combined cycle sets to carry out heat supply to heat supply network under the operating condition that steam turbine is cut entirely, causes combustion gas-steaming
Vapour combined cycle unit steam turbine (does not complete the system debug of steam turbine whole during capital construction, turbine system is deposited because of cause specific
Should not be run in major defect) it can not be passed through high temperature and high pressure steam, but still need to the operating condition that safety and stability heat supply is carried out to heat supply network
Lack necessary technical support.
Summary of the invention
The present invention overcomes the deficiencies in the prior art, provide by high pressure turbine by and intermediate pressure by-pass valve, desuperheating water, steaming
The control of vapour parameter gives full play to the effect of steam turbine " high pressure turbine by " and " intermediate pressure by-pass ", high temperature and high pressure steam is made to pass through side
Road " bypass " steam turbine realizes that 900MW grades of gas-steam combined cycle sets under the operating condition for cutting steam turbine entirely, are realized to heat
The method that net carries out a kind of steam combined cycle power generating unit heat supply period heat network system operation of heat supply.
The technical proposal adopted by the invention to solve the above technical problems is that:
A kind of method of steam combined cycle power generating unit heat supply period heat network system operation, it is characterised in that: including following
Step:
(1) investment is configured to the main logic protection of each system of gas-steam combined cycle set；
(2) gas-steam combined cycle set auxiliary system and its equipment are normally put into；
(3) heat supply network circulation puts into operation；
(4) turbine by-pass puts into operation, and heat exchangers for district heating vapour side is put into operation；
(5) heat network system is hydrophobic puts into operation.
Further more, the main logic protection of each system of gas-steam combined cycle set is configured throwing in the step (1)
Enter to specifically include:
The protection of 1.1 heat exchangers for district heating liquid levels needs to put into, and protection value is put by design is operated normally；
The liquid level protection (high level and low value) of 1.2 hot wells needs to put into, and protection value is put by design is operated normally；
The normal investment of pressure minimum living shield of 1.3 condensate pump entrances；
The body temperature of 1.4 condenser hydrophobic development units needs to put into, and condenser hydrophobic development unit desuperheating water is adjustable；
1.5 condenser body temperatures need to put into, and the water curtain water spray of condenser is adjustable；
1.6 when four heat exchangers for district heatings close entirely into vapour entrance electrically operated gate, waste heat boiler tripping, interlocking combustion engine tripping；
1.7 when four circulation pump of heat-supply network full cut-ofves, waste heat boiler tripping, interlocking combustion engine tripping；
1.8 when four water circulating pump full cut-ofves, waste heat boiler tripping, interlocking combustion engine tripping；
Other in 1.9 to open to condenser electrically operated gate and (take and close disappearance of signal), water curtain desuperheating water pitch 50% is opened in interlocking, together
Shi Liansuo opens low pressure cylinder spray pitch 50%；
Low side decompression valve opening is greater than 5% in 1.10, and water curtain desuperheating water pitch 50% is opened in interlocking, while it is low to interlock unlatching
Cylinder pressure water spray pitch 50%.
Further more, gas-steam combined cycle set auxiliary system and its equipment normally put into specific packet in the step (2)
It includes:
2.1 put into operation compressed air system, confirm system pressure within the scope of 0.45-0.8MPa；
2.2 put into operation circulation, open cooling water system；
2.3 put into operation closed cooling water system, confirm system pressure within the scope of 0.45-0.6MPa；
2.4 put into operation lubricating oil, Seal Oil, jacking oil system, and confirmation lubrication pressure, oil temperature, Seal Oil oil hydrogen differential pressure etc. are just
Often, the spare investment of equipment；
2.5 investment jiggering operations, confirmation jiggering electric current is normal, stablizes, and inside is without abnormal sound；
Compressed air is filled in 2.6 generators, maintains internal engine pressures 0.05MPa, is checked sealing oil system operation, is guaranteed
Sealing oil pressure is higher than pressure 0.035MPa in machine；
2.7 starting furnace ignitings are normal, auxiliary vapour header steam-supplying system normal operation input；
2.8 investment condensate systems, do starting for water on waste heat boiler low-pressure drum and prepare；
2.9 successively put into gland seal system and vacuum system；
After 2.10 condenser vacuums are established, the hydrophobic manual, electric valve on all steam turbine ontologies of steam turbine is gradually opened；
2.11 main, reheaing steam pipes and low-pressure steam pipeline draining system: when master, reheaing steam pipe and low-pressure steam
After pipeline plays pressure, before successively opening pipeline non-return valve, electronic main gate valve is forward and backward, the manual, electric drain valve before regulating valve；
2.12 check high pressure cylinder steam discharges to cold reentrancy cut-off gate, adjustment door open, high pressure live steam piping bypass to it is cold again
Inlet duct without hit, without leakage, bypass manually, automatically engage normal operation；
Pressure live steam piping, which is bypassed to heat supply network steam extraction electrically operated valve, in 2.13 inspections opens, until condenser electrically operated valve is closed,
Pipeline without hit, without leakage, intermediate pressure by-pass automatically engages normal operation；
2.14 inspection low pressure live steam piping to auxiliary vapour header motor-driven valves are closed.It is opened to heat supply network steam extraction motor-driven valve.To condensing
Device bypass duct without hit, without leakage, low voltage bypass is closed；
2.15DCS picture checks that high pressure, middle pressure, each valve location of low-pressure bypass system are correct, and state is normal；Bypass desuperheat
Water has been connected, and has investment condition；Bypath system investment automatically controls.
Further more, in the step (3) after circulation pump of heat-supply network starting, after checking circulation pump of heat-supply network normal operation, manually
Increase its scoop tube aperture, checks that circulation pump of heat-supply network revolving speed rises, heat supply network circulating water flow increases；Optionally start second heat
Net water circulating pump after being incorporated to operation, adjusts two water pump torque equilibriums, meets Thermal Corp's heat supply network circulating water flow demand.
Further more, in the step (4) turbine bypass system the concrete operations requirement that puts into operation are as follows:
4.1 bypath system parameters are according to by 10% load of gas-steam combined cycle set #1 gas turbine, #2 combustion gas wheel
0% load of machine, the full cutting condition of #3 steam turbine are designed control；
After 4.2 high pressure main steams depressurize desuperheat by No. 1 high side valve, into cold section of vapour system of reheating, high other control master
Steam pressure 0.9MPa, 240 DEG C -340 DEG C of temperature after desuperheat；
4.3 reheating hot arc steam come out rear heating network system, middle collateral line system control hot re-compaction power from side valve in No. 1
0.5MPa, after desuperheat between 220 DEG C -320 DEG C of temperature, middle side to turbine condenser electrically operated gate is closed, if heat exchangers for district heating
Initial steam pressure is greater than 0.56MPa, and side controls heat exchangers for district heating initial steam pressure and be less than to turbine condenser electrically operated gate in crawl
0.56MPa；
It is closed in 4.4 low collateral line system operations, the main vapour of low pressure to heat supply network electrically operated gate is opened, the main vapour heating network system of low pressure.
Further more, it is to check that high, medium and low voltage is steamed before combustion engine igniting that the vapour side of heat exchangers for district heating, which is put into operation, in the step (4)
The drain valve of vapour system is opened, and for heat exchangers for district heating by the way of random start, two groups are respectively thrown a heater；Combustion engine igniting,
After each jet chimney heating coil is completed, each drain valve is progressively closed off, while adjusting high, intermediate pressure by-pass system, to heat exchangers for district heating
Warm body heating is carried out with drain cooler；Heat exchangers for district heating initial operation stage notices that opening starting is vented, after normal operation, switching
It is vented to operation；
During putting into operation, adjustment thermic load slowly uniformly should guarantee that heat exchangers for district heating inlet pressure is less than 0.57MPa, enter
Between 220-320 DEG C of temperature of mouth, each heat exchangers for district heating outlet temperature pace of change≤1~3 DEG C/min, heat network system circulating water temperature
≤ 1 DEG C/min of degree variation.
Further more, heat supply network draining system puts into operation when requiring heat exchangers for district heating water level 500 to 600mm or so in the step (5),
Recirculating line conducting, heat supply network drainage pump variable frequency starting；As evaporation capacity for engine increases, heat exchangers for district heating water level is increased, appropriate to open
The hydrophobic outer recirculated water that drains into carries out hot flushing；After heat supply network drain water quality is qualified, by adjusting recirculating line pitch and heat supply network
It is hydrophobic to be matched to condensate system pitch aperture maintenance heat supply network is hydrophobic with the preposition pump discharge pressure of condensed water；Spare heat supply network drainage pump
It optionally puts into spare.
What the present invention obtained has the technical effect that
The present invention gives full play to steamer by the control to high pressure turbine by and intermediate pressure by-pass valve, desuperheating water, steam parameter
The effect of machine " high pressure turbine by " and " intermediate pressure by-pass " makes high temperature and high pressure steam by bypass " bypass " steam turbine, realizes 900MW grades
Gas-steam combined cycle set is realized under the operating condition for cutting steam turbine entirely and carries out heat supply to heat supply network.The present invention solves combustion
Gas-Steam Combined Cycle power generator turbine (does not complete the system debug of steam turbine whole, steam turbine system because of cause specific during capital construction
System there are major defects to run) can not be passed through high temperature and high pressure steam lead to not heat supply period to heat supply network carry out safety it is steady
Determine the problem of heat supply, operations staff is helped to cut off steam turbine in heat supply period " safety ", is gas-steam combined cycle set heat supply
The safe and stable operation of phase heat network system provides technical support and reference.
Detailed description of the invention
Fig. 1 is system connection schematic diagram of the invention.
Specific embodiment
Below by case study on implementation and comparative example, the present invention is further elaborated, but is not limited to the present embodiment.
Heat network system is run under a kind of full cutting condition of 900MW grades of gas-steam combined cycle set heat supply period steam turbine
The innovation of method, invention is: specific step is as follows for this method:
(1) investment is configured to the main logic protection of each system of gas-steam combined cycle set；
(2) gas-steam combined cycle set auxiliary system and its equipment are normally put into；
(3) heat supply network circulation puts into operation；
(4) turbine by-pass puts into operation, and heat exchangers for district heating vapour side is put into operation；
(5) heat network system is hydrophobic puts into operation.
Wherein, the main logic protection of each system of gas-steam combined cycle set is configured throwing in the step (1)
Enter to specifically include:
The protection of 1.1 heat exchangers for district heating liquid levels needs to put into, and protection value is put by design is operated normally；
The liquid level protection (high level and low value) of 1.2 hot wells needs to put into, and protection value is put by design is operated normally；
The normal investment of pressure minimum living shield of 1.3 condensate pump entrances；
The body temperature of 1.4 condenser hydrophobic development units needs to put into, and condenser hydrophobic development unit desuperheating water is adjustable；
1.5 condenser body temperature needs to put into, the water curtain water spray of condenser is adjustable；
1.6 when four heat exchangers for district heatings close entirely into vapour entrance electrically operated gate, waste heat boiler tripping, interlocking combustion engine tripping；
1.7 when four circulation pump of heat-supply network full cut-ofves, waste heat boiler tripping, interlocking combustion engine tripping；
1.8 when four water circulating pump full cut-ofves, waste heat boiler tripping, interlocking combustion engine tripping；
Other in 1.9 to open to condenser electrically operated gate and (take and close disappearance of signal), water curtain desuperheating water pitch 50% is opened in interlocking, together
Shi Liansuo opens low pressure cylinder spray pitch 50%；
Low side decompression valve opening is greater than 5% in 1.10, and water curtain desuperheating water pitch 50% is opened in interlocking, while it is low to interlock unlatching
Cylinder pressure water spray pitch 50%.
Wherein, gas-steam combined cycle set auxiliary system and its equipment normally put into specific packet in the step (2)
It includes:
2.1 put into operation compressed air system, confirm system pressure within the scope of 0.45-0.8MPa；
2.2 put into operation circulation, open cooling water system；
2.3 put into operation closed cooling water system, confirm system pressure within the scope of 0.45-0.6MPa；
2.4 put into operation lubricating oil, Seal Oil, jacking oil system, and confirmation lubrication pressure, oil temperature, Seal Oil oil hydrogen differential pressure etc. are just
Often, the spare investment of equipment；
2.5 investment jiggering operations, confirmation jiggering electric current is normal, stablizes, and inside is without abnormal sound；
Compressed air is filled in 2.6 generators, maintains internal engine pressures 0.05MPa, is checked sealing oil system operation, is guaranteed
Sealing oil pressure is higher than pressure 0.035MPa in machine；
2.7 starting furnace ignitings are normal, auxiliary vapour header steam-supplying system normal operation input；
2.8 investment condensate systems, do starting for water on waste heat boiler low-pressure drum and prepare；
2.9 successively put into gland seal system and vacuum system；
After 2.10 condenser vacuums are established, the hydrophobic manual, electric valve on all steam turbine ontologies of steam turbine is gradually opened.
2.11 main, reheaing steam pipes and low-pressure steam pipeline draining system: when master, reheaing steam pipe and low-pressure steam
After pipeline plays pressure, before successively opening pipeline non-return valve, electronic main gate valve is forward and backward, the manual, electric drain valve before regulating valve.
2.12 check high pressure cylinder steam discharges to cold reentrancy cut-off gate, adjustment door open, high pressure live steam piping bypass to it is cold again
Inlet duct without hit, without leakage, bypass manually, automatically engage normal operation.
Pressure live steam piping, which is bypassed to heat supply network steam extraction electrically operated valve, in 2.13 inspections opens, until condenser electrically operated valve is closed,
Pipeline without hit, without leakage, intermediate pressure by-pass automatically engages normal operation.
2.14 inspection low pressure live steam piping to auxiliary vapour header motor-driven valves are closed.It is opened to heat supply network steam extraction motor-driven valve.To condensing
Device bypass duct without hit, without leakage, low voltage bypass is closed.
2.15DCS picture checks that high pressure, middle pressure, each valve location of low-pressure bypass system are correct, and state is normal.Bypass desuperheat
Water has been connected, and has investment condition.Bypath system investment automatically controls.
Wherein, in the step (3) after circulation pump of heat-supply network starting, after checking circulation pump of heat-supply network normal operation, manually
Increase its scoop tube aperture, checks that circulation pump of heat-supply network revolving speed rises, heat supply network circulating water flow increases.Optionally start second heat
Net water circulating pump after being incorporated to operation, adjusts two water pump torque equilibriums, meets Thermal Corp's heat supply network circulating water flow demand.
Wherein, in the step (4) turbine bypass system the concrete operations requirement that puts into operation are as follows:
4.1 bypath system parameters are according to by 10% load of gas-steam combined cycle set #1 gas turbine, #2 combustion gas wheel
0% load of machine, the full cutting condition of #3 steam turbine are designed control；
After 4.2 high pressure main steams depressurize desuperheat by No. 1 high side valve, into cold section of vapour system of reheating, high other control master
Steam pressure 0.9MPa, 240 DEG C -340 DEG C of temperature after desuperheat；
4.3 reheating hot arc steam come out rear heating network system, middle collateral line system control hot re-compaction power from side valve in No. 1
0.5MPa, after desuperheat between 220 DEG C -320 DEG C of temperature, middle side to turbine condenser electrically operated gate is closed, if heat exchangers for district heating
Initial steam pressure is greater than 0.56MPa, and side controls heat exchangers for district heating initial steam pressure and be less than to turbine condenser electrically operated gate in crawl
0.56MPa；
It is closed in 4.4 low collateral line system operations, the main vapour of low pressure to heat supply network electrically operated gate is opened, the main vapour heating network system of low pressure.
Wherein, it is to check that high, medium and low voltage is steamed before combustion engine igniting that the vapour side of heat exchangers for district heating, which is put into operation, in the step (4)
The drain valve of vapour system is opened, heat exchangers for district heating (two groups are respectively thrown a heater) by the way of random start.Combustion engine igniting,
After each jet chimney heating coil is completed, each drain valve is progressively closed off, while adjusting high, intermediate pressure by-pass system, to heat exchangers for district heating
Warm body heating is carried out with drain cooler.Heat exchangers for district heating initial operation stage notices that opening starting is vented, after normal operation, switching
It is vented to operation.
During putting into operation, adjustment thermic load slowly uniformly should guarantee that heat exchangers for district heating inlet pressure is less than 0.57MPa, enter
Between 220-320 DEG C of temperature of mouth, each heat exchangers for district heating outlet temperature pace of change≤1~3 DEG C/min, heat network system circulating water temperature
≤ 1 DEG C/min of degree variation.
Wherein, heat supply network draining system puts into operation when requiring heat exchangers for district heating water level 500 to 600mm or so in the step (5),
Recirculating line conducting, heat supply network drainage pump variable frequency starting.As evaporation capacity for engine increases, heat exchangers for district heating water level is increased, appropriate to open
The hydrophobic outer recirculated water that drains into carries out hot flushing.After heat supply network drain water quality is qualified, by adjusting recirculating line pitch and heat supply network
It is hydrophobic to be matched to condensate system pitch aperture maintenance heat supply network is hydrophobic with the preposition pump discharge pressure of condensed water.Spare heat supply network drainage pump
It optionally puts into spare.
The advantages and positive effects of the present invention are:
The present invention gives full play to steamer by the control to high pressure turbine by and intermediate pressure by-pass valve, desuperheating water, steam parameter
The effect of machine " high pressure turbine by " and " intermediate pressure by-pass " makes high temperature and high pressure steam by bypass " bypass " steam turbine, realizes 900MW grades
Gas-steam combined cycle set is realized under the operating condition for cutting steam turbine entirely and carries out heat supply to heat supply network.The present invention solves combustion
Gas-Steam Combined Cycle power generator turbine (does not complete the system debug of steam turbine whole, steam turbine system because of cause specific during capital construction
System there are major defects to run) can not be passed through high temperature and high pressure steam lead to not heat supply period to heat supply network carry out safety it is steady
Determine the problem of heat supply, operations staff is helped to cut off steam turbine in heat supply period " safety ", is gas-steam combined cycle set heat supply
The safe and stable operation of phase heat network system provides technical support and reference.
Claims (7)
1. a kind of method of steam combined cycle power generating unit heat supply period heat network system operation, it is characterised in that: including following step
It is rapid:
(1) investment is configured to the main logic protection of each system of gas-steam combined cycle set；
(2) gas-steam combined cycle set auxiliary system and its equipment are normally put into；
(3) heat supply network circulation puts into operation；
(4) turbine by-pass puts into operation, and heat exchangers for district heating vapour side is put into operation；
(5) heat network system is hydrophobic puts into operation.
2. the method for steam combined cycle power generating unit heat supply period heat network system operation according to claim 1, feature
Be: the main logic protection of each system of gas-steam combined cycle set is configured the specific packet of investment in the step (1)
It includes:
The protection of 1.1 heat exchangers for district heating liquid levels needs to put into, and protection value is put by design is operated normally；
The liquid level protection (high level and low value) of 1.2 hot wells needs to put into, and protection value is put by design is operated normally；
The normal investment of pressure minimum living shield of 1.3 condensate pump entrances；
The body temperature of 1.4 condenser hydrophobic development units needs to put into, and condenser hydrophobic development unit desuperheating water is adjustable；
1.5 condenser body temperatures need to put into, and the water curtain water spray of condenser is adjustable；
1.6 when four heat exchangers for district heatings close entirely into vapour entrance electrically operated gate, waste heat boiler tripping, interlocking combustion engine tripping；
1.7 when four circulation pump of heat-supply network full cut-ofves, waste heat boiler tripping, interlocking combustion engine tripping；
1.8 when four water circulating pump full cut-ofves, waste heat boiler tripping, interlocking combustion engine tripping；
Other in 1.9 to open to condenser electrically operated gate and (take and close disappearance of signal), water curtain desuperheating water pitch 50% is opened in interlocking, is joined simultaneously
Lock opens low pressure cylinder spray pitch 50%；
Low other decompression valve opening is greater than 5% in 1.10, and water curtain desuperheating water pitch 50% is opened in interlocking, while interlocking unlatching low pressure (LP) cylinder
Water spray pitch 50%.
3. the method for steam combined cycle power generating unit heat supply period heat network system operation according to claim 1, feature
Be: gas-steam combined cycle set auxiliary system and its equipment normally put into and specifically include in the step (2):
2.1 put into operation compressed air system, confirm system pressure within the scope of 0.45-0.8MPa；
2.2 put into operation circulation, open cooling water system；
2.3 put into operation closed cooling water system, confirm system pressure within the scope of 0.45-0.6MPa；
2.4 put into operation lubricating oil, Seal Oil, jacking oil system, and confirmation lubrication pressure, oil temperature, Seal Oil oil hydrogen differential pressure etc. are normal, if
Standby spare investment；
2.5 investment jiggering operations, confirmation jiggering electric current is normal, stablizes, and inside is without abnormal sound；
Compressed air is filled in 2.6 generators, maintains internal engine pressures 0.05MPa, is checked sealing oil system operation, is guaranteed sealing
Oil pressure is higher than pressure 0.035MPa in machine；
2.7 starting furnace ignitings are normal, auxiliary vapour header steam-supplying system normal operation input；
2.8 investment condensate systems, do starting for water on waste heat boiler low-pressure drum and prepare；
2.9 successively put into gland seal system and vacuum system；
After 2.10 condenser vacuums are established, the hydrophobic manual, electric valve on all steam turbine ontologies of steam turbine is gradually opened；
2.11 main, reheaing steam pipes and low-pressure steam pipeline draining system: when master, reheaing steam pipe and low-pressure steam pipeline
After playing pressure, before successively opening pipeline non-return valve, electronic main gate valve is forward and backward, the manual, electric drain valve before regulating valve；
2.12 check that high pressure cylinder steam discharge to cold reentrancy cut-off gate, adjustment door is opened, and high pressure live steam piping is bypassed to cold reentrancy
Pipeline without hit, without leakage, bypass manually, automatically engage normal operation；
Pressure live steam piping, which is bypassed to heat supply network steam extraction electrically operated valve, in 2.13 inspections opens, until condenser electrically operated valve is closed, pipeline
Without hit, without leakage, intermediate pressure by-pass automatically engages normal operation；
2.14 inspection low pressure live steam piping to auxiliary vapour header motor-driven valves are closed.It is opened to heat supply network steam extraction motor-driven valve.To by condenser
Road pipeline without hit, without leakage, low voltage bypass is closed；
2.15DCS picture checks that high pressure, middle pressure, each valve location of low-pressure bypass system are correct, and state is normal；Bypass desuperheating water
Conducting, has investment condition；Bypath system investment automatically controls.
4. the method for steam combined cycle power generating unit heat supply period heat network system operation according to claim 1, feature
It is: in the step (3) after circulation pump of heat-supply network starting, after checking circulation pump of heat-supply network normal operation, increases its spoon manually
Pipe aperture checks that circulation pump of heat-supply network revolving speed rises, and heat supply network circulating water flow increases；Optionally start second heat supply network recirculated water
Pump, after being incorporated to operation, adjusts two water pump torque equilibriums, meets Thermal Corp's heat supply network circulating water flow demand.
5. the method for steam combined cycle power generating unit heat supply period heat network system operation according to claim 1, feature
It is: the concrete operations requirement that puts into operation of turbine bypass system in the step (4) are as follows:
4.1 bypath system parameters are according to by 10% load of gas-steam combined cycle set #1 gas turbine, #2 gas turbine
0% load, the full cutting condition of #3 steam turbine are designed control；
After 4.2 high pressure main steams depressurize desuperheat by No. 1 high side valve, into cold section of vapour system of reheating, the high other main vapour pressure of control
Power 0.9MPa, 240 DEG C -340 DEG C of temperature after desuperheat；
4.3 reheating hot arc steam come out rear heating network system from side valve in No. 1, and middle collateral line system control hot re-compaction power 0.5MPa subtracts
After temperature between 220 DEG C -320 DEG C of temperature, middle side to turbine condenser electrically operated gate is closed, if heat exchangers for district heating initial steam pressure is big
It is other to turbine condenser electrically operated gate in 0.56MPa, crawl, it controls heat exchangers for district heating initial steam pressure and is less than 0.56MPa；
It is closed in 4.4 low collateral line system operations, the main vapour of low pressure to heat supply network electrically operated gate is opened, the main vapour heating network system of low pressure.
6. the method for steam combined cycle power generating unit heat supply period heat network system operation according to claim 1, feature
Be: it is to check high, medium and low voltage vapour system before combustion engine igniting that the vapour side of heat exchangers for district heating, which is put into operation, in the step (4)
Drain valve is opened, and for heat exchangers for district heating by the way of random start, two groups are respectively thrown a heater；Combustion engine igniting, each steam pipe
After road heating coil is completed, each drain valve is progressively closed off, while adjusting high, intermediate pressure by-pass system, to heat exchangers for district heating and hydrophobic cold
But device carries out warm body heating；Heat exchangers for district heating initial operation stage notices that opening starting is vented, after normal operation, switches to operation row
Gas；
During putting into operation, adjustment thermic load slowly uniformly should guarantee that heat exchangers for district heating inlet pressure is less than 0.57MPa, entrance temperature
Between 220-320 DEG C of degree, each heat exchangers for district heating outlet temperature pace of change≤1~3 DEG C/min, heat network system circulating water temperature becomes
Change≤1 DEG C/min.
7. the method for steam combined cycle power generating unit heat supply period heat network system operation according to claim 1, feature
Be: heat supply network draining system puts into operation in the step (5) when requiring heat exchangers for district heating water level 500 to 600mm or so, recirculation pipe
Road conducting, heat supply network drainage pump variable frequency starting；As evaporation capacity for engine increases, heat exchangers for district heating water level is increased, and suitably opens hydrophobic outlet
Hot flushing is carried out to recirculated water；It is hydrophobic to solidifying by adjusting recirculating line pitch and heat supply network after heat supply network drain water quality is qualified
Bearing water system pitch aperture maintains heat supply network hydrophobic and the preposition pump discharge pressure matching of condensed water；Spare heat supply network drainage pump is optionally thrown
Enter spare.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110043335A (en) * | 2019-04-30 | 2019-07-23 | 北京龙威发电技术有限公司 | A kind of matched annular multistage reducing-and-cooling plant of turbine bypass system |
| CN110159360A (en) * | 2019-06-11 | 2019-08-23 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of Gas-steam Combined Cycle power plant shaft seal steam supply system and steam supplying method |
| CN110848124A (en) * | 2019-09-30 | 2020-02-28 | 国电浙能宁东发电有限公司 | Automatic switching control method and device for electric pump and steam pump and storage medium |
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| CN110043335A (en) * | 2019-04-30 | 2019-07-23 | 北京龙威发电技术有限公司 | A kind of matched annular multistage reducing-and-cooling plant of turbine bypass system |
| CN111895488A (en) * | 2019-05-06 | 2020-11-06 | 河北大唐国际张家口热电有限责公司 | Steam inlet regulating valve applied to heat supply network system and control method |
| CN110159360A (en) * | 2019-06-11 | 2019-08-23 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of Gas-steam Combined Cycle power plant shaft seal steam supply system and steam supplying method |
| CN110159360B (en) * | 2019-06-11 | 2023-12-26 | 中国电力工程顾问集团西北电力设计院有限公司 | Shaft seal steam supply system and method for gas-steam combined cycle power plant |
| CN110848124A (en) * | 2019-09-30 | 2020-02-28 | 国电浙能宁东发电有限公司 | Automatic switching control method and device for electric pump and steam pump and storage medium |
| CN110848124B (en) * | 2019-09-30 | 2021-07-16 | 国电浙能宁东发电有限公司 | Automatic switching control method and device for electric pump and steam pump and storage medium |
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| CN112902203A (en) * | 2021-03-05 | 2021-06-04 | 西安热工研究院有限公司 | Power station boiler steam soot blowing system and intelligent leakage detection identification method thereof |
| CN113606003A (en) * | 2021-08-05 | 2021-11-05 | 国网天津市电力公司电力科学研究院 | Method for quickly starting F-grade gas-steam combined cycle unit to rated load |
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