CN105257352A - Industrial heat supply steam extraction method - Google Patents
Industrial heat supply steam extraction method Download PDFInfo
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- CN105257352A CN105257352A CN201510620092.8A CN201510620092A CN105257352A CN 105257352 A CN105257352 A CN 105257352A CN 201510620092 A CN201510620092 A CN 201510620092A CN 105257352 A CN105257352 A CN 105257352A
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- heat supply
- pressure
- extraction
- flow
- steam
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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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Abstract
Provided is an industrial heat supply steam extraction method. A medium-pressure outer cylinder of a steam turbine is provided with a rotating diaphragm steam extraction opening and a heat supply butterfly valve steam extraction opening so as to extract steam of two pressure levels. The steam extraction flow is controlled by adjusting the rotation angle of a rotating diaphragm and the opening degree of a heat supply butterfly valve. The rated power of the steam turbine is 660 MW. After the rotating diaphragm steam extraction opening corresponds to sixth-level medium-pressure through flow, the steam extraction pressure is 1.0 Mpa. After the heat supply butterfly valve steam extraction opening corresponds to ninth-level medium-pressure through flow, the steam extraction pressure is 0.38 Mpa.
Description
Technical field
The invention belongs to thermal power generating technology, relate to the external heat supply of thermoelectricity plant and to draw gas method, specifically, is that a kind of industrial heating draws gas method.
Background technique
Thermoelectricity plant, while generating, also will provide steam to other industrial heat user.Have two kinds of heat-supplying modes, one is with a boiler specially to industrial heat user steam supply, and concerning thermoelectricity plant, this is very uneconomic, seldom adopts now; Another kind draws gas in steam turbine, is the mode that current thermoelectricity plant generally adopts, but can only provides the steam of a pressure rating, and steam supply flow is also constant.
In recent years, industrial heat user is increasing, and their industry is different, and the pressure rating of steam used is also different.In the face of the market demand, non-adjustable steam extraction thermal power plant unit has following narrow limitation: steam parameter is fixed, steam flow is fixed, the demand that heat user is different cannot be adapted to, waste or the deficiency of thermal source may be caused, the heat supply network Economy of complete machine is reduced, and this also just directly results in the competitive ability of power plant in thermal source user and declines.
Summary of the invention
For above problem, the invention provides a kind of industrial heating and to draw gas method, can provide the heating steam of two kinds of pressure ratings, and steam supply flow is adjustable, its technical solution is:
A kind of industrial heating draws gas method, presses outer shell to arrange rotating barrier extraction opening and heat supply butterfly valve extraction opening, extracts the steam of two kinds of pressure ratings, control extraction flow by the adjustment angle of swing of rotating barrier and the aperture of heat supply butterfly valve in steam turbine.
The rated power 660MW of described steam turbine, after pressing through-flow 6th grade in described rotating barrier extraction opening correspondence, extraction pressure 1.0Mpa; After pressing through-flow 9th grade in described heat supply butterfly valve extraction opening correspondence, extraction pressure 0.38Mpa.
Extraction flow≤the 1000t/h of described rotating barrier extraction opening, the extraction flow≤800t/h of heat supply butterfly valve extraction opening.
Beneficial effect of the present invention:
1, heat supply network user dynamic need is met;
2, unit economy and the competitive ability of unit in heat supply network market is promoted;
3, reduce hazardous emission, in environmental protection, energy-saving and emission-reduction, there is obvious benefit.
Accompanying drawing explanation
Fig. 1 is the outer cylinder structure of middle pressure of the present invention and bleeding point position figure.
Fig. 2 is rotating barrier structural drawing.
Embodiment
See Fig. 1, Fig. 2, this industrial heating draws gas method, in steam turbine, press outer shell that rotating barrier extraction opening and heat supply butterfly valve extraction opening are set, extract the steam of two kinds of pressure ratings, control extraction flow by the adjustment angle of swing of rotating barrier and the aperture of heat supply butterfly valve.
The rated power 660MW of described steam turbine, after pressing through-flow 6th grade in described rotating barrier extraction opening correspondence, extraction pressure 0.8 ~ 1.5Mpa; After pressing through-flow 9th grade in described heat supply butterfly valve extraction opening correspondence, extraction pressure 0.35 ~ 0.55Mpa, the extraction flow≤1000t/h of described rotating barrier extraction opening, the extraction flow≤800t/h of heat supply butterfly valve extraction opening.
By adjusting the aperture (can stop at an arbitrary position from standard-sized sheet to complete shut-down) of rotating barrier and heat supply butterfly valve, realize the extraction flow size that it is controlled separately; Do not need to carry out any one grade draw gas time, rotating barrier and heat supply butterfly valve are all in fully open position.
Above two grades of adjustable draw gas parameter and flows need calculate according to unit actual motion condition be determined.Heat Balance Calculation after determining based on various operating mode of drawing gas, the balance of thermodynamic system and stable when realizing drawing gas working conditions change.
When unit load takes certain proportion to, heat supply of bleeding (comprise extraction steam for factories and heat supply is drawn gas) can put into operation.Drop into pressure governor, make heat supply butterfly valve and rotating barrier drop into regulating of heating net, open the Electric Actuated Stop Valves of extraction for heat supply gradually, adjustment pressure governor makes heat supply pressure flow meet usage requirement.When extraction for heat supply drops into, exhaust point pressure, after pressure governor adjustment, can should drop into a little more than the pressure after the valve be connected with heat supply.The working condition monitoring whole voltage-regulating system should be noted in band heat load process; monitor the respectively section of drawing gas pressure, axial displacement, the change of the table such as relative expansion meter; simultaneously for ensureing unit safety operation, the blade also before centering pressure exhaust stage blade, rotating barrier is specially provided with reports to the police and blocking protection.The speed of increase and decrease heat load need be strictly controlled.
For improving the Economy of unit operation, in guarantee under the condition of the normal heat supply of heat user, the pressure of exhaust point should be made to remain on the minimum point of heat supply network allowable pressure as far as possible.Pressure governor adjusts butterfly valve opening automatically, ensures heating demand (for supplying thermal pressure during unit operation).The given adjustment heat load of pressure governor can be operated as required.
The input of heating system, monitoring when exiting and regular maintenance are extremely important, need operate in strict accordance with related request.
Claims (3)
1. industrial heating draws gas a method, presses outer shell to arrange rotating barrier extraction opening and heat supply butterfly valve extraction opening in steam turbine, extracts the steam of two kinds of pressure ratings, controls extraction flow by the adjustment angle of swing of rotating barrier and the aperture of heat supply butterfly valve.
2. industrial heating as claimed in claim 1 draws gas method, it is characterized in that, the rated power 660MW of described steam turbine, after pressing through-flow 6th grade in described rotating barrier extraction opening correspondence, and extraction pressure 1.0Mpa; After pressing through-flow 9th grade in described heat supply butterfly valve extraction opening correspondence, extraction pressure 0.38Mpa.
3. industrial heating as claimed in claim 2 draws gas method, it is characterized in that, the extraction flow≤1000t/h of described rotating barrier extraction opening, the extraction flow≤800t/h of heat supply butterfly valve extraction opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510620092.8A CN105257352A (en) | 2015-09-25 | 2015-09-25 | Industrial heat supply steam extraction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510620092.8A CN105257352A (en) | 2015-09-25 | 2015-09-25 | Industrial heat supply steam extraction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105257352A true CN105257352A (en) | 2016-01-20 |
Family
ID=55097239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510620092.8A Pending CN105257352A (en) | 2015-09-25 | 2015-09-25 | Industrial heat supply steam extraction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105257352A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1426564A1 (en) * | 2002-11-21 | 2004-06-09 | Siemens Aktiengesellschaft | Method and device for controlling the output of a combined heat and power plant |
| CN1632291A (en) * | 2004-12-30 | 2005-06-29 | 东方汽轮机厂 | Non-tight high temperature steam turbine rotary spacing plate |
| CN101285405A (en) * | 2008-06-03 | 2008-10-15 | 东方电气集团东方汽轮机有限公司 | Steam turbine steam extraction regulation valve |
| CN101344019A (en) * | 2008-07-24 | 2009-01-14 | 东方电气集团东方汽轮机有限公司 | Cogeneration turbine |
| CN103644001A (en) * | 2013-12-19 | 2014-03-19 | 东方电气集团东方汽轮机有限公司 | Turboset for dynamically regulating double-extraction heating steam |
-
2015
- 2015-09-25 CN CN201510620092.8A patent/CN105257352A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1426564A1 (en) * | 2002-11-21 | 2004-06-09 | Siemens Aktiengesellschaft | Method and device for controlling the output of a combined heat and power plant |
| CN1632291A (en) * | 2004-12-30 | 2005-06-29 | 东方汽轮机厂 | Non-tight high temperature steam turbine rotary spacing plate |
| CN101285405A (en) * | 2008-06-03 | 2008-10-15 | 东方电气集团东方汽轮机有限公司 | Steam turbine steam extraction regulation valve |
| CN101344019A (en) * | 2008-07-24 | 2009-01-14 | 东方电气集团东方汽轮机有限公司 | Cogeneration turbine |
| CN103644001A (en) * | 2013-12-19 | 2014-03-19 | 东方电气集团东方汽轮机有限公司 | Turboset for dynamically regulating double-extraction heating steam |
Non-Patent Citations (3)
| Title |
|---|
| 张学凯: "《300MW热-电联供机组抽汽方式选型及结构特定》", 《发电设备》 * |
| 王汝武: "《汽轮机抽汽调压装置旋转隔板和压力匹配器热力性能分析》", 《热电技术》 * |
| 胡泽丰: "《高参数旋转隔板在300MW等级抽汽式机组上的运用》", 《热力透平》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160120 |