CN102434222A - Heating heat supply cogeneration steam turbine - Google Patents
Heating heat supply cogeneration steam turbine Download PDFInfo
- Publication number
- CN102434222A CN102434222A CN2011103854630A CN201110385463A CN102434222A CN 102434222 A CN102434222 A CN 102434222A CN 2011103854630 A CN2011103854630 A CN 2011103854630A CN 201110385463 A CN201110385463 A CN 201110385463A CN 102434222 A CN102434222 A CN 102434222A
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- heating
- low
- condenser
- pressure
- steam turbine
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000000605 extraction Methods 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000112 cooling gas Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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- Control Of Turbines (AREA)
Abstract
The invention discloses a heating cogeneration steam turbine, which comprises a low-pressure part, wherein a last-stage movable blade and a last-stage stationary blade are detached from the low-pressure part, and a protective blade root is additionally arranged on a next-to-last-stage movable blade. The low-pressure part is connected with a condenser, circulating water of the condenser can be switched to a communicated heating pipe network, in the aspect of heating configuration, the condenser is used for a primary heater, and steam extraction of the communicated pipe is used for secondary heating. The technical scheme of the invention has the advantages of high heat supply efficiency, strong safety guarantee, less investment and simple operation and maintenance.
Description
Technical field
The present invention relates to a kind of steam turbine, specifically, relate to a kind of heating co-generation turbine.
Background technique
What domestic existing high pressure series 100MW grade, ultrahigh pressure 135MW grade, ultrahigh pressure 200MW grade, subcritical 300MW grade, the medium-and-large-sized heating steam turbine of overcritical 350MW grade adopted all is the method for drawing gas; Exist heating load few, the problem that the hear rate high efficiency is low.
Conventional turbonator shafting adopts pressure, middle pressure zone low pressure, depression belt generator mode in the high pressure zone; Few for solving heating steam turbine heating load; The problem that the hear rate high efficiency is low; The solution that domestic existing is close be low pressure through press in automatic clutch band high pressure, the high pressure zone, middle pressure zone generator shaft is pattern, realizes the clutch of low pressure and high pressure, middle pressure, and then the realization condensing, draw gas, back pressure operation.
As shown in Figure 1, be that subcritical 330MW takes out type generator set system diagram with fixed attention in the existing technology.330MW takes out that with fixed attention type generator set turbine parameters is following:
Type: subcritical, three cylinders, two steam discharges, resuperheat are taken out wet cooling gas turbine with fixed attention
Model: NC330 (250)-17.75/0.4/540/540
Machine packet size: length overall 19121mm
Unit progression: high pressure I+10, middle pressure 12, low pressure 2 * 5
Heating extraction pressure: 0.4Mpa.a (0.25～0.5Mpa.a)
Heating extraction temperature: 241 ℃
Heating extraction flow: specified 550t/h, maximum 600t/h
Heating hear rate: the 5331kj/kw.h that draws gas
As shown in Figure 2, be that overcritical 350MW takes out type generator set system diagram with fixed attention in the existing technology.350MW takes out that with fixed attention type generator set turbine parameters is following:
Type: overcritical, two-cylinder two-exhaust, resuperheat are taken out wet cooling gas turbine with fixed attention
Model: NC350 (276)-24.2/0.4/566/566
Machine packet size: length overall 16511.5mm
Unit progression: high pressure I+7, middle pressure 7, low pressure 2 * 5
Heating extraction pressure: 0.4Mpa.a (0.25～0.5Mpa.a)
Heating extraction temperature: 253 ℃
Heating extraction flow: specified 500t/h, maximum 550t/h
Heating hear rate: the 5568kj/kw.h that draws gas
The solution that domestic existing is close be low pressure through press in automatic clutch band high pressure, the high pressure zone, middle pressure zone generator shaft is pattern, realizes the clutch of low pressure and high pressure, middle pressure, and then the realization condensing, draw gas, back pressure operation.Its shortcoming is: pressure zone generator in the axle system, and axle journal transmitting torque ability is little; Low pressure is through clutch band high pressure, and axle is that torsion Vibration assurance property is poor; Thereby what cause existing medium-and-large-sized heating steam turbine employing all is the method for drawing gas, and heating load is few, and the hear rate high efficiency is low, and energy utilization rate is low.
Summary of the invention
The technical problem that the present invention solved provides a kind of heating co-generation turbine, and heating efficiency is high, safety assurance property strong, little investment, operation maintenance are simple.
Technological scheme is following:
A kind of heating co-generation turbine comprises low-pressure section, and the inferior last stage movable vane of the low-pressure section behind dismounting final stage moving blade and the final stage stator blade adds the protection blade root.
Further: said low-pressure section connects condenser, and condenser circulating water switches to UNICOM's heating pipe network, and aspect the heating configuration, said condenser is used for the one-level heater, and drawing gas connecting tube is used for the secondary heating.
Technique effect contrasts as follows:
The existing technology unit:
Subcritical 330MW heating extraction flow: specified 550t/h, maximum 600t/h
Subcritical 330MW heating hear rate: the 5331kj/kw.h that draws gas
Overcritical 350MW heating extraction flow: specified 500t/h, maximum 550t/h
Overcritical 350MW heating hear rate: the 5568kj/kw.h that draws gas
Unit of the present invention:
Subcritical 330MW heating extraction flow:
500t/h (11479t/h, 91.0 ℃ of water), add 600t/h (11479t/h, 121.8 ℃ of water) as the occasion requires
Subcritical 330MW heating draw gas hear rate: 4181kj/kw.h, add 4830kj/kw.h as the occasion requires
Overcritical 350MW heating extraction flow: 500t/h (11275t/h, 91.7 ℃ of water), add 600t/h (11275t/h, 120.7 ℃ of water) as the occasion requires
Overcritical 350MW heating draw gas hear rate: 4243kj/kw.h, add 4670kj/kw.h as the occasion requires
Can find out that from contrast technological scheme heating efficiency of the present invention is high, safety assurance property is strong, little investment, operation maintenance are simple.
Description of drawings
Fig. 1 is that subcritical 330MW takes out with fixed attention type generator set system diagram in the existing technology, and A, the middle and high pressure main stop valve of C----, B, the middle and high pressure modulating valve of D----, E----heat supply network stop valve, I----draw gas and regulate the butterfly valve K----bypass safety valve that draws gas;
Fig. 2 is that overcritical 350MW takes out type generator set system diagram with fixed attention in the existing technology; A, the middle and high pressure main stop valve of C----, B, the middle and high pressure modulating valve of D----, E----heat supply network stop valve, the I----adjusting butterfly valve that draws gas, the K----bypass safety valve that draws gas;
Fig. 3 is the electrical systematic drawing that adopts the heating co-generation turbine among the present invention;
The C----high pressure main stop valve, the D----septum valve is pressed main stop valve among the A----, B----reheat control valve, E----heat supply network stop valve, the I----adjusting butterfly valve that draws gas, K----safety valve.
Embodiment
Technological scheme of the present invention adopts disassemble or assemble exhaust stage blade method to realize the steam turbine circulating water heating and the conventional pure condensate method of operation.
Below with reference to exemplary preferred embodiments and reference drawings, technological scheme of the present invention is described in detail.
As shown in Figure 3, be
system diagram that adopts the heating co-generation turbine among the present invention.
For heating improves the thermal efficiency in the heating phase, in the low-pressure section final stage of steam turbine, the dynamic and static blade of final stage is all dismantled, install the protection blade root additional at inferior last stage movable vane.Low temperature heating is the separate unit operation, does secondary with drawing gas during the high temperature heating and heats.
Steam turbine master thermodynamic system is constant.
Heating configuration aspect, condenser circulating water can switch to UNICOM's heating pipe network, adopt condenser as the one-level heater, draw gas connecting tube and heat as secondary.
Adopt the separate unit generator.
---major parameter (thermal parameter, general arrangement physical dimension)
Steam inlet condition: constant
Steam discharge parameter: 30kpa.a
Machine packet size: constant
Unit progression: low pressure reduces final stage
Heating pressure: 0.3Mpa.a (0.25～0.5Mpa.a)
Heating temperature: constant basically
The heating flow:
Sub type NB pattern 500t/h (11479t/h, 91.0 ℃ of water)
Add 600t/h (11479t/h, 121.8 ℃ of water) as the occasion requires
SC type NB pattern 500t/h (11275t/h, 91.7 ℃ of water)
Add 600t/h (11275t/h, 120.7 ℃ of water) as the occasion requires
The heating hear rate:
Sub type NB pattern 4181kj/kw.h
SC type NB pattern 4243kj/kw.h
Heating power:
Sub type NB pattern 265.8MW
SC type NB pattern 288.1MW
Non-heating period: each thermal parameter of unit is constant.
---body structure changes (each axle journal, fore bearing case internal sleeve, connecting tube)
The Sub type
Constant.
The SC type
Constant.
---subsystem (main oil pump, barring gear)
Lubricating oil system: constant.
Jacking oil system: constant.
Sealing system: constant.
Draining system: constant.
---subsidiary engine (condenser-circulating water pump configuration)
Vapour condenser changes circulating water heating mode, stoppages in transit such as circulating water pump into.
---control-protection
Increase B form operation control;
Monitoring and protection increase to two kinds of back pressure protection definite values.
---the start and stop operation
Can be fully according to taking out unit operation mode operation with fixed attention.
Claims (2)
1. a heating co-generation turbine comprises low-pressure section, it is characterized in that: the inferior last stage movable vane of the low-pressure section behind dismounting final stage moving blade and the final stage stator blade adds the protection blade root.
2. heating co-generation turbine as claimed in claim 1; It is characterized in that: said low-pressure section connects condenser, and condenser circulating water switches to UNICOM's heating pipe network, aspect the heating configuration; Said condenser is used for the one-level heater, draws gas connecting tube to be used for the secondary heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103854630A CN102434222A (en) | 2011-11-28 | 2011-11-28 | Heating heat supply cogeneration steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103854630A CN102434222A (en) | 2011-11-28 | 2011-11-28 | Heating heat supply cogeneration steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102434222A true CN102434222A (en) | 2012-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103854630A Pending CN102434222A (en) | 2011-11-28 | 2011-11-28 | Heating heat supply cogeneration steam turbine |
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| Country | Link |
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| CN (1) | CN102434222A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670547A (en) * | 2013-12-11 | 2014-03-26 | 东方电气集团东方汽轮机有限公司 | Method for enhancing heat supply capability of three-steam-exhaust 200MW turboset |
| CN103696819A (en) * | 2013-12-07 | 2014-04-02 | 广西柳州发电有限责任公司 | High pressure and low pressure two-stage industrial steam extraction heat supply device for steam turbine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57124003A (en) * | 1981-01-27 | 1982-08-02 | Toshiba Corp | Geothermal turbine |
| EP1391588A1 (en) * | 2002-08-13 | 2004-02-25 | GREENPOWER Anlagenerrichtungs- und Betriebs-GmbH | method and apparatus for generating of force and heat from waste heat or from fuels |
| CN101871371A (en) * | 2010-06-07 | 2010-10-27 | 北京联合优发能源技术有限公司 | Combined heat and power generation energy-saving device and method for supplying heat by waste heat |
| CN101949612A (en) * | 2010-08-27 | 2011-01-19 | 清华大学 | Cooling mode driven by utilizing urban heat supply network |
| CN102011616A (en) * | 2010-11-22 | 2011-04-13 | 山东泓奥电力科技有限公司 | High-flow, low-parameter and high-backpressure expansion power energy-saving system |
| CN202370595U (en) * | 2011-11-28 | 2012-08-08 | 北京北重汽轮电机有限责任公司 | Heating combined heat and power generating steam turbine |
-
2011
- 2011-11-28 CN CN2011103854630A patent/CN102434222A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57124003A (en) * | 1981-01-27 | 1982-08-02 | Toshiba Corp | Geothermal turbine |
| EP1391588A1 (en) * | 2002-08-13 | 2004-02-25 | GREENPOWER Anlagenerrichtungs- und Betriebs-GmbH | method and apparatus for generating of force and heat from waste heat or from fuels |
| CN101871371A (en) * | 2010-06-07 | 2010-10-27 | 北京联合优发能源技术有限公司 | Combined heat and power generation energy-saving device and method for supplying heat by waste heat |
| CN101949612A (en) * | 2010-08-27 | 2011-01-19 | 清华大学 | Cooling mode driven by utilizing urban heat supply network |
| CN102011616A (en) * | 2010-11-22 | 2011-04-13 | 山东泓奥电力科技有限公司 | High-flow, low-parameter and high-backpressure expansion power energy-saving system |
| CN202370595U (en) * | 2011-11-28 | 2012-08-08 | 北京北重汽轮电机有限责任公司 | Heating combined heat and power generating steam turbine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696819A (en) * | 2013-12-07 | 2014-04-02 | 广西柳州发电有限责任公司 | High pressure and low pressure two-stage industrial steam extraction heat supply device for steam turbine |
| CN103696819B (en) * | 2013-12-07 | 2015-10-28 | 广西柳州发电有限责任公司 | Steam turbine high low pressure two-stage extraction steam for factories heating arrangement |
| CN103670547A (en) * | 2013-12-11 | 2014-03-26 | 东方电气集团东方汽轮机有限公司 | Method for enhancing heat supply capability of three-steam-exhaust 200MW turboset |
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Application publication date: 20120502 |