CN110259527A - A kind of power output of super-pressure 200MW low pressure (LP) cylinder zero flexibility transformation steam turbine - Google Patents
A kind of power output of super-pressure 200MW low pressure (LP) cylinder zero flexibility transformation steam turbine Download PDFInfo
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- CN110259527A CN110259527A CN201910673660.9A CN201910673660A CN110259527A CN 110259527 A CN110259527 A CN 110259527A CN 201910673660 A CN201910673660 A CN 201910673660A CN 110259527 A CN110259527 A CN 110259527A
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- 230000009466 transformation Effects 0.000 title abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 169
- 238000001816 cooling Methods 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 239000007921 spray Substances 0.000 claims abstract description 24
- 238000000605 extraction Methods 0.000 claims abstract description 21
- 230000000740 bleeding effect Effects 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims description 23
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 238000012856 packing Methods 0.000 claims description 12
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 6
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- 238000009833 condensation Methods 0.000 claims 1
- 230000005494 condensation Effects 0.000 claims 1
- 230000003628 erosive effect Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 206010037660 Pyrexia Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009418 renovation Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Classifications
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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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
-
- 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
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
-
- 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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
Abstract
A kind of power output of super-pressure 200MW low pressure (LP) cylinder zero flexibility transformation steam turbine, belongs to steam turbine technology field.The present invention is that there are dynamic stress risk, air blast risk and water erosion risks to solve the problems, such as the transformation of the power output flexibility peak regulation of low pressure (LP) cylinder zero.The present invention includes high pressure cylinder, intermediate pressure cylinder, low pressure (LP) cylinder, low pressure cools down vapour system, heating steam bleeding system and low pressure cylinder spray system, mesolow communicating pipe is provided between intermediate pressure cylinder and low pressure (LP) cylinder, heating steam extraction interface is disposed with along vapour direction out on mesolow communicating pipe, low pressure (LP) cylinder cooling steam venthole, butterfly valve and low pressure (LP) cylinder cooling steam air intake, the air intake of the cooling vapour system of low pressure is connected on low pressure (LP) cylinder cooling steam venthole, the venthole of the cooling vapour system of low pressure is connected on low pressure (LP) cylinder cooling steam air intake, the air intake of heating steam bleeding system is connected on heating steam extraction interface, low pressure cylinder spray system carries out spray desuperheating to the final stage moving blade of low pressure (LP) cylinder.Present invention is mainly used for steam turbine reformations.
Description
Technical field
The invention belongs to steam turbine technology fields, and in particular to a kind of power output flexibility of low pressure (LP) cylinder zero of super-pressure 200MW
The steam turbine of transformation.
Background technique
Mode is transformed in existing 200MW grade heat supply retrofitted unit, such as high back pressure transformation, optical axis back pressure machine, still follows
The principle of electricity determining by heat, heat and power supply have relevance, while meeting power plant's heat demand, are unable to satisfy the electric peak regulation of power plant
Demand, there is an urgent need to new flexibility peak regulations, and type is transformed in market.
It is a kind of completely new operational mode proposed in recent years, low pressure that the power output operation of low pressure (LP) cylinder zero, which is transformed, in fired power generating unit flexibility
The power output of cylinder zero is Steam Turbine under supplying thermal condition, and intermediate pressure cylinder discharge steam removes heating, and low pressure (LP) cylinder does not do work, with other fire
Motor group flexibility renovation technique, such as heat storage can heat supply, electric boiler heat supply, bypass heat supply mode compare, in economic benefit, society
There can be very big advantage in terms of benefit, environmental benefit, it is main that steam turbine carries out the power output flexibility peak regulation transformation of low pressure (LP) cylinder zero
There are dynamic stress risk, air blast risk and water erosion risks, take which kind of measure, guarantee unit safety stable operation, are low pressure (LP) cylinders
The key of zero power output flexibility peak regulation renovation technique, there are no the power output flexibility transformation of low pressure (LP) cylinder zero is long-term steady for domestic each power plant
Surely the precedent run.
Summary of the invention
The present invention is to solve existing 200MW steam turbine progress low pressure (LP) cylinder zero power output flexibility peak regulation transformation and mainly deposit
Dynamic stress risk, air blast risk and the water erosion risk the problem of；A kind of power output of super-pressure 200MW low pressure (LP) cylinder zero flexibility is now provided
Steam turbine is transformed.
The technical solution adopted by the present invention is that:
A kind of super-pressure 200MW low pressure (LP) cylinder zero flexibility transformation steam turbine of contributing includes high pressure cylinder, intermediate pressure cylinder 2, low pressure (LP) cylinder
3, the cooling vapour system 5 of low pressure, heating steam bleeding system 6 and low pressure cylinder spray system 7, are provided between intermediate pressure cylinder 2 and low pressure (LP) cylinder 3
Mesolow communicating pipe 1, it is disposed with along vapour direction out that heating steam extraction interface, low pressure (LP) cylinder are cooling to be steamed on mesolow communicating pipe 1
Vapour venthole, butterfly valve 4 and low pressure (LP) cylinder cooling steam air intake, it is cold that the air intake of the cooling vapour system 5 of low pressure is connected to low pressure (LP) cylinder
But on Vapor outlet, the venthole of the cooling vapour system 5 of low pressure is connected on low pressure (LP) cylinder cooling steam air intake, heating steam extraction
The air intake of system 6 is connected on heating steam extraction interface, and low pressure cylinder spray system 7 sprays water to the final stage moving blade of low pressure (LP) cylinder
Desuperheat.
Further, the cooling vapour system 5 of the low pressure include packing pipeline 5-1, electric gate valve 5-8, two it is hydrophobic
Pipeline 5-2, two the second regulating valve 5-3, the first electric flow control valve 5-4, temperature regulation station 5-5, thermocouple 5-6 and pressure
Table 5-7；
The admission end of packing pipeline 5-1 is connected on low pressure (LP) cylinder cooling steam venthole, and the steam output end of packing pipeline 5-1 connects
It connects on low pressure (LP) cylinder cooling steam air intake, is disposed with electric brake along the flow direction of steam on packing pipeline 5-1
Valve 5-8, the first drain water piping water outlet, the first electric flow control valve 5-4, temperature regulation station 5-5, the water outlet of the second drain water piping
Mouth, thermocouple 5-6 and pressure gauge 5-7, wherein a drain water piping 5-2 is connected on the first drain water piping water outlet, another
Drain water piping 5-2 is connected on the second drain water piping water outlet, and second regulating valve is respectively set on every drain water piping 5-2
5-3；
Temperature regulation station 5-5 includes condensate line 5-5-1, the 7th hand stop valve 5-5-2, the adjusting of the second electric flow
Valve 5-5-3, the 8th hand stop valve 5-5-4, attemperator 5-5-5, the 9th hand stop valve 5-5-6, and condensed water branch line
The water inlet of 5-5-7, condensate line 5-5-1 are connected on condensate pump, and the water outlet of condensate line 5-5-1, which is connected to, to be subtracted
On warm device 5-5-5, the 7th hand stop valve 5-5-2, second are disposed with along water (flow) direction on condensate line 5-5-1
Electric flow control valve 5-5-3 and the 8th hand stop valve 5-5-4, condensed water branch line 5-5-7 and condensate line 5-5-1
It is arranged in parallel, the inlet and outlet of condensed water branch line 5-5-7 are connected on condensate line 5-5-1, and solidifying
The water inlet of branch line 5-5-7 is born water in the front end of the 7th hand stop valve 5-5-2, condensed water branch line 5-5-7's
Water outlet is in being provided with the 9th hand stop valve on the rear end of the 8th hand stop valve 5-5-4, condensed water branch line 5-5-7
5-5-6。
Further, the heating steam bleeding system 6 includes extraction line 6-1, safety valve 6-2, non-return valve 6-3, adjusts
Valve 6-4 and shut-off valve 6-5, the admission end of extraction line 6-1 are connected on heating steam extraction interface, on extraction line 6-1 along
Vapour direction is disposed with safety valve 6-2, non-return valve 6-3, regulating valve 6-4 and shut-off valve 6-5 out.
Further, the low pressure cylinder spray system 7 includes first via water injection system and the second tunnel water injection system；
Wherein first via water injection system includes the first water pipe 7-1, the first branch line 7-4, first manual shut-off valve
7-2, the second hand stop valve 7-5, third hand stop valve 7-6 and the first regulating valve 7-3, the water inlet of the first water pipe 7-1
Mouthful be connected on condensed water water outlet, the water outlet of the first water pipe 7-1 be divided into two strands and respectively with an atomizer phase
Even, first manual shut-off valve 7-2, the first regulating valve 7-3 and second are disposed with along water (flow) direction on the first water pipe 7-1
Hand stop valve 7-5, the first branch line 7-4 are arranged in parallel with the first water pipe 7-1, the water inlet of the first branch line 7-4
Mouth is connected on the first water pipe 7-1 with water outlet, and the water inlet of the first branch line 7-4 is cut in first manual
Only before valve 7-2, the water outlet of the first branch line 7-4 is after the second hand stop valve 7-5, the first branch line 7-4
On be provided with third hand stop valve 7-6；
Wherein the second tunnel water injection system includes the second water pipe 7-7, second branched pipe road 7-8, the 4th hand stop valve
7-9, the 5th hand stop valve 7-10, the 6th hand stop valve 7-11 and third regulating valve 7-12, the second water pipe 7-7 into
The mouth of a river is connected on condensed water water outlet, the water outlet of the second water pipe 7-7 be divided into two strands and respectively with an atomizer
Be connected, on the second water pipe 7-7 along water (flow) direction be disposed with the 4th hand stop valve 7-9, third regulating valve 7-12 and
5th hand stop valve 7-10, second branched pipe road 7-8 are arranged in parallel with the second water pipe 7-7, second branched pipe road 7-8's
Water inlet and water outlet are connected on the second water pipe 7-7, and the water inlet of second branched pipe road 7-8 is in the 4th hand
Before dynamic shut-off valve 7-9, the water outlet of second branched pipe road 7-8 is after the 5th hand stop valve 7-10, second branched pipe
The 6th hand stop valve 7-11 is provided on the 7-8 of road.
Further, the top of 3 exhaust stage blade of low pressure (LP) cylinder is provided with shroud structure 3-1,3 exhaust stage blade of low pressure (LP) cylinder
Middle upper section be provided with boss tie pieces 3-2.
Further, the lagging edge of the last stage and penultimate stage rotor blade of low pressure (LP) cylinder has carried out the spray intensified processing in surface.
The beneficial effect that the present invention generates compared with prior art is:
1, after the present invention using the cooling vapour system of low pressure is used to that flexibility is prevented to be transformed, low pressure (LP) cylinder is because of low pressure rotor air blast
Fever deformation, has an impact shaft system of unit；
2, the part high-temperature steam in intermediate pressure cylinder is used for the heat supply of user by heating steam bleeding system；
3, low pressure cylinder spray system is put into stage by stage using two-way water injection system, not only guarantees temperature lowering effect, but also avoid spraying water
It is excessive, reduce blade erosion caused by desuperheating water flows back.
Detailed description of the invention
Fig. 1 is heating steam bleeding system figure；
Fig. 2 is the cooling vapour system figure of low pressure；
Fig. 3 is low pressure cylinder spray system diagram；
Fig. 4 is the structural schematic diagram of low pressure (LP) cylinder exhaust stage blade.
Specific embodiment
Specific embodiment 1: embodiment is described with reference to Fig. 1, and in present embodiment, a kind of super-pressure
The power output flexibility transformation steam turbine of 200MW low pressure (LP) cylinder zero includes high pressure cylinder, intermediate pressure cylinder 2, low pressure (LP) cylinder 3, the cooling vapour system of low pressure
5, heating steam bleeding system 6 and low pressure cylinder spray system 7, are provided with mesolow communicating pipe 1 between intermediate pressure cylinder 2 and low pressure (LP) cylinder 3, in it is low
Heating steam extraction interface, low pressure (LP) cylinder cooling steam venthole, butterfly valve 4 and low are disposed with along vapour direction out on pressure communicating pipe 1
The air intake of cylinder pressure cooling steam air intake, the cooling vapour system 5 of low pressure is connected on low pressure (LP) cylinder cooling steam venthole, low pressure
The venthole of cooling steam system 5 is connected on low pressure (LP) cylinder cooling steam air intake, and the air intake of heating steam bleeding system 6 is connected to
On heating steam extraction interface, low pressure cylinder spray system 7 carries out spray desuperheating to the final stage moving blade of low pressure (LP) cylinder.
After using the cooling vapour system of low pressure being used to that flexibility is prevented to be transformed in the present invention, low pressure (LP) cylinder is because of low pressure rotor air blast
Fever deformation, has an impact shaft system of unit, generates air blast risk；
When butterfly valve on mesolow communicating pipe is closed, a part of steam in intermediate pressure cylinder is used by heating steam bleeding system
The heat supply at family, another part steam is to carry out cooling processing to low pressure (LP) cylinder；
Low pressure cylinder spray system is used to carry out spray desuperheating to the final stage moving blade of low pressure (LP) cylinder.
Specific embodiment 2: embodiment is described with reference to Fig. 2, and in present embodiment, the low pressure cooling steam
System 5 includes packing pipeline 5-1, electric gate valve 5-8, two drain water piping 5-2, two the second regulating valve 5-3, the first electronic streams
Adjustable valve 5-4, temperature regulation station 5-5, thermocouple 5-6 and pressure gauge 5-7；
The admission end of packing pipeline 5-1 is connected on low pressure (LP) cylinder cooling steam venthole, and the steam output end of packing pipeline 5-1 connects
It connects on low pressure (LP) cylinder cooling steam air intake, is disposed with electric brake along the flow direction of steam on packing pipeline 5-1
Valve 5-8, the first drain water piping water outlet, the first electric flow control valve 5-4, temperature regulation station 5-5, the water outlet of the second drain water piping
Mouth, thermocouple 5-6 and pressure gauge 5-7, wherein a drain water piping 5-2 is connected on the first drain water piping water outlet, another
Drain water piping 5-2 is connected on the second drain water piping water outlet, and second regulating valve is respectively set on every drain water piping 5-2
5-3；
Temperature regulation station 5-5 includes condensate line 5-5-1, the 7th hand stop valve 5-5-2, the adjusting of the second electric flow
Valve 5-5-3, the 8th hand stop valve 5-5-4, attemperator 5-5-5, the 9th hand stop valve 5-5-6, and condensed water branch line
The water inlet of 5-5-7, condensate line 5-5-1 are connected on condensate pump, and the water outlet of condensate line 5-5-1, which is connected to, to be subtracted
On warm device 5-5-5, the 7th hand stop valve 5-5-2, second are disposed with along water (flow) direction on condensate line 5-5-1
Electric flow control valve 5-5-3 and the 8th hand stop valve 5-5-4, condensed water branch line 5-5-7 and condensate line 5-5-1
It is arranged in parallel, the inlet and outlet of condensed water branch line 5-5-7 are connected on condensate line 5-5-1, and solidifying
The water inlet of branch line 5-5-7 is born water in the front end of the 7th hand stop valve 5-5-2, condensed water branch line 5-5-7's
Water outlet is in being provided with the 9th hand stop valve on the rear end of the 8th hand stop valve 5-5-4, condensed water branch line 5-5-7
5-5-6。
The cooling gas resources of low pressure cooling system are a part of steam drawn from intermediate pressure cylinder, via electric gate valve, flow
Enter low pressure (LP) cylinder after the components desuperheats such as orifice plate, pressure and temperature reducing valve group, temperature, pressure-measuring-point to be cooled down, by the lower steaming of temperature
Vapour is sent into low pressure (LP) cylinder, reduces low pressure (LP) cylinder internal temperature.
Other compositions and connection type are same as the specific embodiment one.
Specific embodiment 3: embodiment is described with reference to Fig. 1, and in present embodiment, the heating steam bleeding system 6
Including extraction line 6-1, safety valve 6-2, non-return valve 6-3, regulating valve 6-4 and shut-off valve 6-5, the admission end of extraction line 6-1
It is connected on heating steam extraction interface, is disposed with safety valve 6-2, non-return valve 6- along vapour direction out on extraction line 6-1
3, regulating valve 6-4 and shut-off valve 6-5.
Other compositions and connection type are same as the specific embodiment one.
Specific embodiment 4: embodiment is described with reference to Fig. 3, and in present embodiment, the low pressure cylinder spray system
System 7 includes first via water injection system and the second tunnel water injection system；
Wherein first via water injection system includes the first water pipe 7-1, the first branch line 7-4, first manual shut-off valve
7-2, the second hand stop valve 7-5, third hand stop valve 7-6 and the first regulating valve 7-3, the water inlet of the first water pipe 7-1
Mouthful be connected on condensed water water outlet, the water outlet of the first water pipe 7-1 be divided into two strands and respectively with an atomizer phase
Even, first manual shut-off valve 7-2, the first regulating valve 7-3 and second are disposed with along water (flow) direction on the first water pipe 7-1
Hand stop valve 7-5, the first branch line 7-4 are arranged in parallel with the first water pipe 7-1, the water inlet of the first branch line 7-4
Mouth is connected on the first water pipe 7-1 with water outlet, and the water inlet of the first branch line 7-4 is cut in first manual
Only before valve 7-2, the water outlet of the first branch line 7-4 is after the second hand stop valve 7-5, the first branch line 7-4
On be provided with third hand stop valve 7-6；
Wherein the second tunnel water injection system includes the second water pipe 7-7, second branched pipe road 7-8, the 4th hand stop valve
7-9, the 5th hand stop valve 7-10, the 6th hand stop valve 7-11 and third regulating valve 7-12, the second water pipe 7-7 into
The mouth of a river is connected on condensed water water outlet, the water outlet of the second water pipe 7-7 be divided into two strands and respectively with an atomizer
Be connected, on the second water pipe 7-7 along water (flow) direction be disposed with the 4th hand stop valve 7-9, third regulating valve 7-12 and
5th hand stop valve 7-10, second branched pipe road 7-8 are arranged in parallel with the second water pipe 7-7, second branched pipe road 7-8's
Water inlet and water outlet are connected on the second water pipe 7-7, and the water inlet of second branched pipe road 7-8 is in the 4th hand
Before dynamic shut-off valve 7-9, the water outlet of second branched pipe road 7-8 is after the 5th hand stop valve 7-10, second branched pipe
The 6th hand stop valve 7-11 is provided on the 7-8 of road.
Low pressure cylinder spray system all uses stainless steel product, guarantees system stable operation, using atomizer, guarantees spray
Water temperature lowering effect；
Using two-way water injection system, first via water injection system is used under non-heating operating condition use, second under non-heating operating condition
Road water injection system does not come into operation, and first via water injection system and the second road water spray come into operation under heating operating condition, throws stage by stage
Enter, not only guarantee temperature lowering effect, but also avoid water spray excessive, reducing desuperheating water reflux leads to blade erosion.
Other compositions and connection type are same as the specific embodiment one.
Specific embodiment 5: embodiment is described with reference to Fig. 4, and in present embodiment, the 3 final stage leaf of low pressure (LP) cylinder
The top of piece is provided with shroud structure 3-1, and the middle upper section of 3 exhaust stage blade of low pressure (LP) cylinder is provided with boss tie pieces 3-2.
Low pressure (LP) cylinder end two-stage moving-stator blade is replaced, there is novel 730mm final stage moving blade very high safety and water erosion resistent to rush
Brush performance, novel 730mm final stage moving blade are included shroud structure, have boss tie pieces, using multifork root, safety can be protected
Card has passed through design strength check.
Other compositions and connection type are same as the specific embodiment one.
Specific embodiment 6: the lagging edge of the last stage and penultimate stage rotor blade of the low pressure (LP) cylinder has carried out surface spraying
Intensive treatment has carried out supersonic flame spraying protective treatment, improve the performance that blade water erosion resistent washes away.
For prevention air blast risk and dynamic stress risk, low pressure (LP) cylinder flow passage component operating status need to be monitored, it is ensured that unit safety
It runs, newly-increased low pressure (LP) cylinder final stage, penult movable vane outlet temperature measuring point 4, before intermediate pressure cylinder exhaust steam pressure measuring point heat supply butterfly valve, 1
It is a and temperature point 1, increase low pressure (LP) cylinder initial steam pressure measuring point 1 and temperature point 1.
Other compositions and connection type are identical as specific embodiment five.
Claims (6)
1. a kind of super-pressure 200MW low pressure (LP) cylinder zero is contributed, steam turbine is transformed in flexibility, it is characterised in that: it include high pressure cylinder, in
Cylinder pressure (2), low pressure (LP) cylinder (3), low pressure cooling vapour system (5), heating steam bleeding system (6) and low pressure cylinder spray system (7), middle pressure
It is provided between cylinder (2) and low pressure (LP) cylinder (3) mesolow communicating pipe (1), is successively set on mesolow communicating pipe (1) along vapour direction out
It is equipped with heating steam extraction interface, low pressure (LP) cylinder cooling steam venthole, butterfly valve (4) and low pressure (LP) cylinder cooling steam air intake, low pressure is cooling
The air intake of vapour system (5) is connected on low pressure (LP) cylinder cooling steam venthole, and the venthole of low pressure cooling vapour system (5) connects
It connects on low pressure (LP) cylinder cooling steam air intake, the air intake of heating steam bleeding system (6) is connected on heating steam extraction interface, low pressure (LP) cylinder
Water injection system (7) carries out spray desuperheating to the final stage moving blade of low pressure (LP) cylinder.
2. a kind of super-pressure 200MW low pressure (LP) cylinder zero according to claim 1 is contributed, steam turbine is transformed in flexibility, and feature exists
In: the low pressure cooling vapour system (5) includes packing pipeline (5-1), electric gate valve (5-8), two drain water piping (5-
2), two the second regulating valves (5-3), the first electric flow control valve (5-4), temperature regulation station (5-5), thermocouple (5-6) and
Pressure gauge (5-7)；
The admission end of packing pipeline (5-1) is connected on low pressure (LP) cylinder cooling steam venthole, and the steam output end of packing pipeline (5-1) connects
It connects on low pressure (LP) cylinder cooling steam air intake, is disposed on packing pipeline (5-1) along the flow direction of steam electronic
It is gate valve (5-8), the first drain water piping water outlet, the first electric flow control valve (5-4), temperature regulation station (5-5), second hydrophobic
Pipe water outlet, thermocouple (5-6) and pressure gauge (5-7), wherein a drain water piping (5-2) is connected to the first drain pipe and says
On the mouth of a river, another drain water piping (5-2) is connected on the second drain water piping water outlet, on every drain water piping (5-2) respectively
One the second regulating valve (5-3) is set；
Temperature regulation station (5-5) includes condensate line (5-5-1), the 7th hand stop valve (5-5-2), the second electric flow tune
Save valve (5-5-3), the 8th hand stop valve (5-5-4), attemperator (5-5-5), the 9th hand stop valve (5-5-6), and condensation
The water inlet of moisture bye-pass (5-5-7), condensate line (5-5-1) is connected on condensate pump, condensate line (5-5-1)
Water outlet be connected on attemperator (5-5-5), be disposed with the 7th along water (flow) direction on condensate line (5-5-1)
Hand stop valve (5-5-2), the second electric flow control valve (5-5-3) and the 8th hand stop valve (5-5-4) condense water branch
Pipeline (5-5-7) is arranged in parallel with condensate line (5-5-1), the inlet and outlet of condensed water branch line (5-5-7)
It is connected on condensate line (5-5-1), and the water inlet of condensed water branch line (5-5-7) is in the 7th manual shutoff
The front end of valve (5-5-2), the water outlet of condensed water branch line (5-5-7) in the rear end of the 8th hand stop valve (5-5-4),
The 9th hand stop valve (5-5-6) is provided on condensed water branch line (5-5-7).
3. a kind of super-pressure 200MW low pressure (LP) cylinder zero according to claim 1 is contributed, steam turbine is transformed in flexibility, and feature exists
In: the heating steam bleeding system (6) includes extraction line (6-1), safety valve (6-2), non-return valve (6-3), regulating valve (6-4)
With shut-off valve (6-5), the admission end of extraction line (6-1) is connected on heating steam extraction interface, on extraction line (6-1) along
Vapour direction is disposed with safety valve (6-2), non-return valve (6-3), regulating valve (6-4) and shut-off valve (6-5) out.
4. a kind of super-pressure 200MW low pressure (LP) cylinder zero according to claim 1 is contributed, steam turbine is transformed in flexibility, and feature exists
In: the low pressure cylinder spray system (7) includes first via water injection system and the second tunnel water injection system；
Wherein first via water injection system includes the first water pipe (7-1), the first branch line (7-4), first manual shut-off valve
(7-2), the second hand stop valve (7-5), third hand stop valve (7-6) and the first regulating valve (7-3), the first water pipe
The water inlet of (7-1) is connected on condensed water water outlet, and the water outlet of the first water pipe (7-1) is divided into two strands and respectively with one
A atomizer is connected, and is disposed with first manual shut-off valve (7-2), the along water (flow) direction on the first water pipe (7-1)
One regulating valve (7-3) and the second hand stop valve (7-5), the first branch line (7-4) is in parallel with the first water pipe (7-1) to be set
It sets, the water inlet and water outlet of the first branch line (7-4) are connected on the first water pipe (7-1), and the first branch
The water inlet of pipeline (7-4) is before first manual shut-off valve (7-2), and the water outlet of the first branch line (7-4) is in
After two hand stop valves (7-5), third hand stop valve (7-6) is provided on the first branch line (7-4)；
Wherein the second tunnel water injection system includes the second water pipe (7-7), second branched pipe road (7-8), the 4th hand stop valve
(7-9), the 5th hand stop valve (7-10), the 6th hand stop valve (7-11) and third regulating valve (7-12), the second sparge pipe
The water inlet on road (7-7) is connected on condensed water water outlet, the water outlet of the second water pipe (7-7) be divided into two strands and respectively with
One atomizer is connected, on the second water pipe (7-7) along water (flow) direction be disposed with the 4th hand stop valve (7-9),
Third regulating valve (7-12) and the 5th hand stop valve (7-10), second branched pipe road (7-8) and the second water pipe (7-7) are simultaneously
Connection setting, the water inlet and water outlet of second branched pipe road (7-8) are connected on the second water pipe (7-7), and second
The water inlet of branch line (7-8) is before the 4th hand stop valve (7-9), the water outlet of second branched pipe road (7-8)
After the 5th hand stop valve (7-10), the 6th hand stop valve (7-11) is provided on second branched pipe road (7-8).
5. a kind of super-pressure 200MW low pressure (LP) cylinder zero according to claim 1 is contributed, steam turbine is transformed in flexibility, and feature exists
In: the top of described low pressure (LP) cylinder (3) exhaust stage blade is provided with shroud structure (3-1), the middle upper section of low pressure (LP) cylinder (3) exhaust stage blade
It is provided with boss tie pieces (3-2).
6. a kind of super-pressure 200MW low pressure (LP) cylinder zero according to claim 5 is contributed, steam turbine is transformed in flexibility, and feature exists
In: the lagging edge of the last stage and penultimate stage rotor blade of low pressure (LP) cylinder has carried out the spray intensified processing in surface.
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Application publication date: 20190920 |