CN105402716A - Combined operation method for three low-voltage heaters - Google Patents
Combined operation method for three low-voltage heaters Download PDFInfo
- Publication number
- CN105402716A CN105402716A CN201510658581.2A CN201510658581A CN105402716A CN 105402716 A CN105402716 A CN 105402716A CN 201510658581 A CN201510658581 A CN 201510658581A CN 105402716 A CN105402716 A CN 105402716A
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- Prior art keywords
- low
- pressure
- door
- pressure heater
- vacuum
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
- F22D1/325—Schematic arrangements or control devices therefor
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- 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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
Abstract
The invention discloses a combined operation method for three low-voltage heaters. According to operation conditions of turbines, the best put-into-operation sequence of the low-voltage heaters of the turbines is optimized by gradually adjusting steam extraction valves, vacuum valves and all water draining pipelines, and it is ensured that temperatures and water levels of the low-voltage heaters are normal, so that safe and stable operation of a turbine set is guaranteed.
Description
Technical field
The present invention relates to steam turbine operating system, particularly relate to the cooperation method of the low-pressure heater of steam turbine.
Background technology
Dynamics factory mainly provides power source medium for main body factories and miness, and major product has 13 kinds of power source products such as blast furnace air, cogeneration, low pressure steam, compressed air, height, Jiao, coal gas of converter, soft water, demineralized water.60MW regenerative system of turbogenerator unit is generally provided with three low-pressure heaters, adopts stream-liquid two-phase flow automatic steam trap to be dredged by three low-pressure heater hydrophobic pressing force step by step sequences and squeezes into condensate system into condenser or through drainage pump.General load puts into operation when 10MW a low-pressure heater, and 15MW puts into operation two low-pressure heaters, and 25MW puts into operation three low-pressure heaters.In the unit regulation stage, put into operation low-pressure heater time on vacuum system impact larger, six take out temperature is difficult to stable and low-pressure heater blocked drain and causes the problems such as water level is high, through debugging unit, owner, overall budget side, steam-water two-phase flow drainer, drain valve and vacuum system are searched in many ways, do not find reason, be not resolved after unit puts into operation always, affect the safety of unit, stable operation.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention aims to provide a kind of cooperation method of three low-pressure heaters.
The present invention is achieved by following technical solution:
A cooperation method for three low-pressure heaters, the steps include:
(1) close the draining valve of three low-pressure heaters, open the steam trap entrance water valve of three low-pressure heaters, close bypass drain by-pass;
(2) run 1# low-pressure heater, the door that drawn gas by first paragraph is slowly opened and is controlled extraction temperature < 100 DEG C, when water level raises close to higher limit, opens drain by-pass valve 20 circle and makes water level decreasing within the scope of 695mm ~ 705m;
(3) run 2# low-pressure heater, the door that drawn gas by second segment is slowly opened and is controlled extraction temperature within the scope of 90 DEG C ~ 120 DEG C, adjustment drain by-pass valve by water lev el control within the scope of 325mm ~ 335mm;
(4) run 3# low-pressure heater, slowly open the 3rd section of door that draws gas, and the hydrophobic contact valve adjusting 2# low-pressure heater and 3# low-pressure heater keeps 3# low-temperature heater water level within the scope of 315mm ~ 325mm.
Described low-pressure heater needs the Vacuum door 1 to 2 opening each low-pressure heater of vacuum to enclose before running, do not go up to close Vacuum door, can go up and just can continue operation after the water yield in hydrophobic water seal declines as pressure drop.
After described three low-pressure heaters run, increase according to load, slowly need turn down draw gas door and adjustment Vacuum door and drain by-pass of second segment and first paragraph extraction temperature and each low-pressure heater water temperature are adjusted in each range of operation.
Described second segment draw gas door turn down to whole process 1/4 time, open large 3# low-pressure heater Vacuum door to vacuum pressure and not decline and water level do not occur sharply to change.
The invention has the beneficial effects as follows:
Compared with prior art, the cooperation method of a kind of three low-pressure heaters provided by the invention is according to steam turbine operation situation, the best optimizing steam turbine low-pressure heater puts into operation order, guarantees the normal and unit safety stable operation of low-pressure heating actuator temperature, water level.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described further, but described in required protection domain is not limited to;
As shown in the figure, the cooperation method of a kind of three low-pressure heaters provided by the invention, the steps include:
(1) close the draining valve of three low-pressure heaters, open the steam trap entrance water valve of three low-pressure heaters, close bypass drain by-pass;
(2) run 1# low-pressure heater, the door that drawn gas by first paragraph is slowly opened and is controlled extraction temperature < 100 DEG C, when water level raises close to higher limit, opens drain by-pass valve 20 circle and makes water level decreasing within the scope of 695mm ~ 705m;
(3) run 2# low-pressure heater, the door that drawn gas by second segment is slowly opened and is controlled extraction temperature within the scope of 90 DEG C ~ 120 DEG C, adjustment drain by-pass valve by water lev el control within the scope of 325mm ~ 335mm;
(4) run 3# low-pressure heater, slowly open the 3rd section of door that draws gas, and the hydrophobic contact valve adjusting 2# low-pressure heater and 3# low-pressure heater keeps 3# low-temperature heater water level within the scope of 315mm ~ 325mm.
Described low-pressure heater needs the Vacuum door 1 to 2 opening each low-pressure heater of vacuum to enclose before running, do not go up to close Vacuum door, can go up and just can continue operation after the water yield in hydrophobic water seal declines as pressure drop.
After described three low-pressure heaters run, increase according to load, slowly need turn down draw gas door and adjustment Vacuum door and drain by-pass of second segment and first paragraph extraction temperature and each low-pressure heater water temperature are adjusted in each range of operation.
Described second segment draw gas door turn down to whole process 1/4 time, open large 3# low-pressure heater Vacuum door to vacuum pressure and not decline and water level do not occur sharply to change.
Embodiment: Shoudu Iron and Steel Co Shui Gang dynamics factory newly-built 60MW generating set in 2012 is put into serial production, this unit, for being provided with three low-pressure heaters, adopting stream-liquid two-phase flow automatic steam trap to be dredged by three low-pressure heater hydrophobic pressing force step by step sequences and squeezes into condensate system into condenser or through drainage pump.And in the unit regulation stage, put into operation low-pressure heater time comparatively large on vacuum system impact, there is taking out temperature and be difficult to stable and 2# low-pressure heater blocked drain and cause the problems such as water level is high.
Its operating personnel start low-voltage device according to following steps.
The first step: close back three low-pressure heater row trench draining valves, check steam trap gateway water valve standard-sized sheet, drain by-pass door closes.
Second step: put into operation 1# low-pressure heater
(1) slightly open Vacuum door one to two circle, note the change of vacuum, do not go up should not close back the Vacuum door slightly opened if any decline, check hydrophobic water seal whether water-filling, as rise after declining can proceed the operation that puts into operation.
(2) slowly open first paragraph to draw gas door, observe first paragraph extraction temperature and drop to less than 100 DEG C, treat that water level is elevated to close to higher limit, 20 circles of adjustment drain by-pass door screw thread, water level should decline, and according to water level decreasing fine speed adjustment drain by-pass door, keeps water level to remain on 700mm.
3rd step: put into operation 2# low-pressure heater
(1) operate by put into operation 1 ~ 2 of step of 1# low-pressure heater.
(2) slowly open second segment to draw gas door, control two sections of extraction temperatures at about 100 DEG C.
(3) adjust 10 circles of 2# low-pressure heater drain by-pass door screw thread, observe SEA LEVEL VARIATION situation, rise according to water level or decline fine setting drain by-pass door, keeps water level about 330mm.
4th step: put into operation 2# low-pressure heater
(1) operate by put into operation 1 ~ 2 of step of 1# low-pressure heater, but do not open drain by-pass door.
(2) slowly the 3rd section of door that draws gas is opened.
(3) adjust 20 of 3# low-pressure heater and the hydrophobic communicating door screw thread of 2# low-pressure heater to enclose, maintenance water level is at about 320mm.
2, water level adjustment and extraction temperature adjustment
After low-pressure heater puts into operation, operation major control one section of extraction temperature of steam bleeding system below 100 and water level in normal range (NR).According to the change of load, one section of extraction temperature and three low-pressure heater water levels likely change, and the change of low-pressure heater water level simultaneously may affect again one section of extraction temperature, and method of adjustment is as follows:
(1) load increases, and one section of extraction temperature likely rises, and according to rising situation, slowly turns down five sections of doors that draw gas, and adjusting the change of Vacuum door and drain by-pass door cooperation adjustment water level simultaneously, should accomplish slow, patient when adjusting.
(2) if five sections are drawn gas and close enough little (being less than 1/4 of total travel), suitably can open large 3# low-pressure heater Vacuum door, the amplitude opened do not decline with vacuum and water level sharply change be as the criterion.
After above step operating unit, unit at full capacity time three sections of extraction temperatures 169 DEG C, two sections of extraction temperatures 102 DEG C, the 72 DEG C of stable operations of one section of extraction temperature, each low-pressure heater stable level is produced and is carried out smoothly.
Claims (4)
1. a cooperation method for three low-pressure heaters, the steps include:
(1) close the draining valve of three low-pressure heaters, open the steam trap entrance water valve of three low-pressure heaters, close bypass drain by-pass;
(2) run 1# low-pressure heater, the door that drawn gas by first paragraph is slowly opened and is controlled extraction temperature < 100 DEG C, when water level raises close to higher limit, opens drain by-pass valve 20 circle and makes water level decreasing within the scope of 695mm ~ 705m;
(3) run 2# low-pressure heater, the door that drawn gas by second segment is slowly opened and is controlled extraction temperature within the scope of 90 DEG C ~ 120 DEG C, adjustment drain by-pass valve by water lev el control within the scope of 325mm ~ 335mm;
(4) run 3# low-pressure heater, slowly open the 3rd section of door that draws gas, and the hydrophobic contact valve adjusting 2# low-pressure heater and 3# low-pressure heater keeps 3# low-temperature heater water level within the scope of 315mm ~ 325mm.
2. the cooperation method of a kind of three low-pressure heaters according to claim 1, it is characterized in that: described low-pressure heater needs to open each low-pressure heater of vacuum Vacuum door 1 to 2 before running encloses, do not go up to close Vacuum door as pressure drop, can go up after the water yield in hydrophobic water seal declines and just can continue operation.
3. the cooperation method of a kind of three low-pressure heaters according to claim 1, it is characterized in that: after described three low-pressure heaters run, according to load increase, need slowly turn down second segment draw gas door and adjustment Vacuum door and drain by-pass first paragraph extraction temperature and each low-pressure heater water temperature are adjusted in each range of operation.
4. the cooperation method of a kind of three low-pressure heaters according to claim 3, it is characterized in that: described second segment draw gas door turn down to whole process 1/4 time, open large 3# low-pressure heater Vacuum door to vacuum pressure and not decline and water level do not occur sharply to change.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510658581.2A CN105402716B (en) | 2015-10-12 | 2015-10-12 | A kind of cooperation method of three low-pressure heaters |
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| CN201510658581.2A CN105402716B (en) | 2015-10-12 | 2015-10-12 | A kind of cooperation method of three low-pressure heaters |
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| CN105402716A true CN105402716A (en) | 2016-03-16 |
| CN105402716B CN105402716B (en) | 2017-10-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154360A (en) * | 2021-05-13 | 2021-07-23 | 镇江裕太防爆电加热器有限公司 | Water level switching method of intelligent high-pressure heater for nuclear power |
| CN113819400A (en) * | 2021-07-30 | 2021-12-21 | 西安西热节能技术有限公司 | Multi-source integrated automatic switching combined steam supply system and method |
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| CN102588938A (en) * | 2012-02-14 | 2012-07-18 | 西安热工研究院有限公司 | Energy-saving quick power regulating system of thermal generator set and method |
| US20130188939A1 (en) * | 2012-01-19 | 2013-07-25 | Alstom Technology Ltd | Heating system for a thermal electric power station water circuit |
| CN203431826U (en) * | 2013-08-29 | 2014-02-12 | 北京京诚科林环保科技有限公司 | Steam turbine water supply heat regenerative system capable of recovering waste heat steam |
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2015
- 2015-10-12 CN CN201510658581.2A patent/CN105402716B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130188939A1 (en) * | 2012-01-19 | 2013-07-25 | Alstom Technology Ltd | Heating system for a thermal electric power station water circuit |
| CN102588938A (en) * | 2012-02-14 | 2012-07-18 | 西安热工研究院有限公司 | Energy-saving quick power regulating system of thermal generator set and method |
| CN203431826U (en) * | 2013-08-29 | 2014-02-12 | 北京京诚科林环保科技有限公司 | Steam turbine water supply heat regenerative system capable of recovering waste heat steam |
Non-Patent Citations (2)
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| 刘先荣: "50MW机组低加疏水系统的经济性分析与改造", 《湖北电力》 * |
| 许小聪: "低加疏水系统运行中的常见问题及治理建议", 《华东电力》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154360A (en) * | 2021-05-13 | 2021-07-23 | 镇江裕太防爆电加热器有限公司 | Water level switching method of intelligent high-pressure heater for nuclear power |
| CN113819400A (en) * | 2021-07-30 | 2021-12-21 | 西安西热节能技术有限公司 | Multi-source integrated automatic switching combined steam supply system and method |
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| CN105402716B (en) | 2017-10-31 |
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