CN207245782U - Coal-burning power plant's turbine by-pass steam thermal energy retracting device - Google Patents
Coal-burning power plant's turbine by-pass steam thermal energy retracting device Download PDFInfo
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- CN207245782U CN207245782U CN201721305010.1U CN201721305010U CN207245782U CN 207245782 U CN207245782 U CN 207245782U CN 201721305010 U CN201721305010 U CN 201721305010U CN 207245782 U CN207245782 U CN 207245782U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000006837 decompression Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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Abstract
The utility model provides a kind of coal-burning power plant's turbine by-pass steam thermal energy retracting device, including bypass duct, the bypass duct is divided into two-way, bypass duct communicating valve preceding pipeline all the way, another way connection small steam turbine steam inlet pipe road, the small steam turbine steam inlet pipe road is connected to small steam turbine, small steam turbine connection small steam turbine discharge duct, and small steam turbine discharge duct is connected to exhaust pipe；The valve preceding pipeline connection bypass steam converter valve, bypass steam converter valve is connected to pipeline after valve, pipeline is connected to exhaust pipe after valve, the bypass steam converter valve has also accessed bypass desuperheat waterpipe, another paths of the utility model increase bypass, impact of the steam to bypass valve and its downstream line can be reduced, while reduce the water slug of host using the steam energy for flowing through turbine by-pass.
Description
Technical field
Coal-burning power plant's steam turbine energy recycle device is the utility model is related to, is specifically coal-burning power plant's turbine by-pass steam
Heat-energy recovering apparatus.
Background technology
Coal-burning power plant's steam turbine hp and lp bypass is mainly used in unit starting, shutdown and special operation condition.Unit opens
When dynamic, bypass is used for main reheated steam increasing temperature and pressure, the temperature of main reheated steam is risen to and metal temperature in cylinder of steam turbine
Matching, then start into vapour；During compressor emergency shutdown, certain steam through-current capacity is maintained, it is ensured that Boiler Stable Combustion；Special operation condition
When, carry out main reheated steam pressure release.
At present, hp and lp bypass is most of is depressured by valve throttle, is then re-introduced into water to steam temperature reducing.Unit
During startup, the spool of valve, sealing surface of seat are by blow loss steam converter valve by steam and water bursting, and long-time thermal damage is serious, valve
Door sealing damage leakage vapour, valve are not closed completely；After valve is closed, temperature can go up always after valve, and when highest may reach
460 degree of road, temperature is excessive after high side valve and water spray is incorrect, while tube metal is thinning after causing high side valve, influences unit
Security.High side needs to open desuperheating water, is easy to cause water and enters steam turbine high-pressure cylinder.During unit starting, unit is run into
Start time length, the amount of heat of main reheated steam is cooled down by desuperheating water, and high-quality heat energy directly slatterns, and does not obtain profit
With.
Utility model content
Deficiency provides a kind of coal-burning power plant's turbine by-pass steam thermal energy recycling dress to the utility model according to prior art
Put, coal-burning power plant's turbine by-pass steam thermal energy retracting device can recover energy, and reduce change steam flow and valve and pipeline are rushed
Brush, reduces the risk of high pressure cylinder water slug.
The technical solution of the utility model：A kind of coal-burning power plant's turbine by-pass steam thermal energy retracting device, including bypass
Pipeline, the bypass duct are divided into two-way, and communicating valve preceding pipeline, another way connect small steam turbine steam inlet pipe to bypass duct all the way
Road, the small steam turbine steam inlet pipe road are connected to small steam turbine, and small steam turbine connection small steam turbine discharge duct is small
Type gas turbine exhaust gas pipeline is connected to exhaust pipe；The valve preceding pipeline connection bypass steam converter valve, bypasses steam converter valve
Pipeline after valve is connected to, pipeline is connected to exhaust pipe after valve, and the bypass steam converter valve has also accessed bypass desuperheat water pipe
Road.
The bypass duct is when unit starting and main reheat steam temperature are less than 200 DEG C and emergency situation, reject steam
By bypass duct, valve preceding pipeline is flowed through, then to bypass steam converter valve, through bypassing steam converter valve decompression and bypass desuperheating water
Exhaust pipe is flowed out to after the water desuperheat of pipeline.
The bypass duct is in the case of unit starting or other use bypasses, and main reheat steam temperature is more than 200 DEG C
And main reheated steam, when having more than the 56 DEG C degrees of superheat, reject steam is introduced by bypass duct through small steam turbine steam inlet pipe road
Small steam turbine simultaneously does work small steam turbine, then is discharged through small steam turbine blow-off line, into exhaust pipe.
The technique effect of the utility model：Increase another paths of bypass, the steam for flowing through turbine by-pass can be utilized
Energy, reduces impact of the steam to bypass valve and its downstream line, while reduces the water slug of host.
Brief description of the drawings
Fig. 1 is the utility model overall structure diagram.
Figure label represents respectively：1- bypass ducts, 2- valve preceding pipelines, 3- bypass steam converter valves, 4- bypass desuperheating waters
Pipeline, pipeline after 5- valves, 6- small steam turbine steam inlet pipes road, 7- small steam turbines, 8- small steam turbine blow-off lines, 9- tail gas
Pipeline.
Embodiment
The utility model is further illustrated below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of coal-burning power plant's turbine by-pass steam thermal energy retracting device, including bypass duct 1, the side
Road pipeline 1 divides for two-way, 1 one road communicating valve preceding pipeline 2 of bypass duct, another way connection small steam turbine steam inlet pipe road 6, described
Small steam turbine steam inlet pipe road 6 is connected to small steam turbine 7, and small steam turbine 7 connects small steam turbine discharge duct 8, small-sized
Gas turbine exhaust gas pipeline 8 is connected to exhaust pipe 9；The connection of the valve preceding pipeline 2 bypass steam converter valve 3, bypasses pressure and temperature reducing
Valve 3 is connected to pipeline 5 after valve, and pipeline 5 is connected to exhaust pipe 9 after valve, and the bypass steam converter valve 3, which also accesses, has bypass to subtract
Warm water pipe 4.
At unit starting initial stage, when the main reheat steam temperature of unit starting is less than 200 DEG C and emergency situation, reject steam
By bypass duct 1, valve preceding pipeline 2 is flowed through, then to bypass steam converter valve 3, steam converter valve 3 depressurizes and bypass subtracts through bypassing
Exhaust pipe 9 is flowed out to after the water desuperheat of warm water pipe 4.
It is unit starting initial stage, other when main reheat steam temperature reaches more than 200 DEG C, and has more than 56 degree of the degree of superheat
Road steam is introduced small steam turbine 7 through small steam turbine steam inlet pipe road 6 and is done work to small steam turbine 7 by bypass duct 1,
Discharged again through small steam turbine blow-off line 8, into exhaust pipe 9, main reheated steam circulation passage be switched to small turbine into
The main reheated steam energy regenerating of row.After steam stream with certain pressure and temperature crosses small steam turbine, steam obtain desuperheat and
Decompression, the energy of steam is recycled, while reduces high-temperature steam and valve and pipeline are washed away, and reduces steam-water mixing not
Steam flowing caused by deteriorates and the generation of jump in temperature situation, alleviates desuperheat valve and the easy thermal stress damage of pipeline, together
When reduce water spray by height and pour in down a chimney possibility into high pressure cylinder.
The turbine by-pass steam energy recycling device of the utility model, it is (small-sized for bypass steam converter valve configuration bypass
Steam turbine), compared with original designs, flowing through the high-grade energy of the steam of bypass can be utilized, and be converted into the dynamic of small turbine
Energy；Reduce the great fluctuation process of flowing and temperature of the steam in steam converter valve, reduce the Thermal Stress of steam, reduce
Impact of the steam to pipeline；The usage amount of by-pass reducing valve water spray is greatly reduced, reduces the risk of cylinder body of host machine water slug.
Above content is only to illustrate the technological thought of the utility model, it is impossible to the protection model of the utility model is limited with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical solution, each falls within this reality
Within protection domain with new claims.
Claims (3)
- A kind of 1. coal-burning power plant's turbine by-pass steam thermal energy retracting device, it is characterised in that：Including bypass duct, the bypass Pipeline is divided into two-way, and communicating valve preceding pipeline, another way connect small steam turbine steam inlet pipe road, the small size gasoline to bypass duct all the way Turbine steam inlet pipe road is connected to small steam turbine, small steam turbine connection small steam turbine discharge duct, small steam turbine exhaust Pipeline is connected to exhaust pipe；The valve preceding pipeline connection bypass steam converter valve, bypass steam converter valve are managed after being connected to valve Road, pipeline is connected to exhaust pipe after valve, and the bypass steam converter valve has also accessed bypass desuperheat waterpipe.
- 2. turbine by-pass steam thermal energy retracting device in coal-burning power plant's according to claim 1, it is characterised in that：The side For road pipeline when unit starting and main reheat steam temperature are less than 200 DEG C and emergency situation, reject steam passes through bypass duct, stream Through valve preceding pipeline, then to bypass steam converter valve, after the water desuperheat of the decompression of bypass steam converter valve and bypass desuperheat waterpipe Flow out to exhaust pipe.
- 3. turbine by-pass steam thermal energy retracting device in coal-burning power plant's according to claim 2, it is characterised in that：The side In the case of unit starting or other use bypasses, main reheat steam temperature has road pipeline more than 200 DEG C and main reheated steam During more than the 56 DEG C degrees of superheat, reject steam introduces small steam turbine and right by bypass duct, through small steam turbine steam inlet pipe road Small steam turbine does work, then is discharged through small steam turbine blow-off line, into exhaust pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721305010.1U CN207245782U (en) | 2017-10-11 | 2017-10-11 | Coal-burning power plant's turbine by-pass steam thermal energy retracting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721305010.1U CN207245782U (en) | 2017-10-11 | 2017-10-11 | Coal-burning power plant's turbine by-pass steam thermal energy retracting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207245782U true CN207245782U (en) | 2018-04-17 |
Family
ID=61891165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721305010.1U Active CN207245782U (en) | 2017-10-11 | 2017-10-11 | Coal-burning power plant's turbine by-pass steam thermal energy retracting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207245782U (en) |
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2017
- 2017-10-11 CN CN201721305010.1U patent/CN207245782U/en active Active
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