CN101852105A - Steam exhaust direct-discharge system of feed pump turbine of direct air-cooling unit - Google Patents
Steam exhaust direct-discharge system of feed pump turbine of direct air-cooling unit Download PDFInfo
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- CN101852105A CN101852105A CN 201010184985 CN201010184985A CN101852105A CN 101852105 A CN101852105 A CN 101852105A CN 201010184985 CN201010184985 CN 201010184985 CN 201010184985 A CN201010184985 A CN 201010184985A CN 101852105 A CN101852105 A CN 101852105A
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Abstract
The invention discloses a steam exhaust direct-discharge system of a feed pump turbine of a direct air-cooling unit, which solves the problems of system complexity, huge primary investment, relatively larger occupation and high water consumption in the prior art. The steam exhaust direct-discharge system comprises a main steam pipeline (1), a main turbine (3), a shaft coupling (4), a generator (5), a main turbine steam discharge pipeline (6), a main turbine steam discharge device (7), a direct air-cooling steam discharge pipeline (8), direct air-cooling radiators (9) and a direct air-cooling condensed water pipeline (10). A steam introduction pipeline (12) of the feed pump turbine is communicated together with the feed pump turbine (14) through a feed pump turbine union valve (13); a feed pump turbine steam discharge pipeline (17) is communicated together with the main turbine steam discharge device (7); and the feed pump turbine steam discharge pipeline (17) is provided with an electric steam discharge butterfly valve (18). The steam exhaust direct-discharge system is particularly suitable for the direct air-cooling units of 300,000 or above.
Description
Technical field
The present invention relates to the exhaust steam cooling system of a kind of thermal power plant Direct Air-cooled Unit feed pump turbine, be the cooling system that feed pump turbine exhaust steam steam discharge and main steam turbine exhaust steam steam discharge are combined, changed the mode of existing Direct Air-cooled Unit feed pump turbine steam discharge cooling.
Background technique
In the most of area of northern China, water has become the principal element of restriction electric power industry development.According to the national policy of sustainable development, build the inevitable choice that the air cooling power station is a development national economy in rich coal water-deficient area.Boiler feed pump is one of subsidiary engine equipment important in the power plant, and the drive form of choose reasonable feed water pump plays important effect for the cost and the safety and economic operation of whole generating factory.Gone into operation at present and in the thermal power plant Direct Air-cooled Unit of building, the driving pattern of feed water pump mainly contains following two kinds: motoring pattern and Steam Turbine Driven pattern.There is power plant's auxiliary power consumption height in motoring feed water pump form, and generated energy is few, the problem that economic benefit is low.In Steam Turbine Driven feed water pump form, the exhaust steam in steam turbine cooling system can be divided into dual mode again: a kind of is that the steam feed pump steam turbine carries the clammy form of vapour condenser, and another kind is that the steam feed pump steam turbine carries the indirect methods for cooling of vapour condenser.The steam feed pump steam turbine carries the vapour condenser humid-cool system and exists equipment many, system complex, and first investment is big, and floor space is bigger, and water usage is big, the defective that deviates to some extent with Air-cooled Unit water saving theory.And carrying the vapour condenser indirect cooling system, the steam feed pump steam turbine exist equipment many, first investment is big, and floor space is big, system's bulky complex, underground water pipeline complicated layout when causing site operation, technical problem such as air cooling heat radiator winter bursting by freezing takes place easily, leak.
Summary of the invention:
The in line system of driving feed pump turbine provided by the invention exhaust steam has solved existing steam feed pump steam turbine and has carried the complex structure that the vapour condenser humid-cool system exists, first investment is big, floor space is bigger, the problem that water usage is big, also having solved simultaneously existing steam feed pump steam turbine, to carry the system that the vapour condenser indirect cooling system exists huge, underground water pipeline complicated layout, air cooling heat radiator easily generation bursting by freezing in winter, the technical problem of leaking.
The present invention overcomes the above problems by following scheme:
The in line system of the exhaust steam of Direct Air-cooled Unit feed pump turbine, comprise main steam line, main vapour associating steam valve, main steam turbine, coupling, generator, the main steam turbine blow-off line, the main steam turbine steam exhaust device, the direct air cooling blow-off line, the direct air cooling radiator, direct air cooling condensing water conduit and main frame hot well, the steam input pipe road of feed pump turbine is connected together through feed pump turbine associating steam valve and feed pump turbine, the mechanical output shaft of feed pump turbine is mechanically coupled together by coupling and boiler feed pump, feed pump turbine blow-off line and main steam turbine steam exhaust device are connected together, and the feed pump turbine blow-off line is provided with feed pump turbine steam discharge butterfly valve.
Described feed pump turbine be back pressure at 7-55 kPa, the warning multiplication of voltage is 65 kPas, shuts down back pressure and be 65-75 kPa feed pump turbine.
Described feed pump turbine steam discharge butterfly valve is an electric butterfly valve, and this butterfly valve start up period of described main steam turbine or operation-stopping stage be in automatic closed condition, thereby play the effect that main steam turbine group and feed pump turbine is cut off at above-mentioned two working stages.
The invention has the beneficial effects as follows, feed pump turbine exhaust steam steam discharge and main steam turbine exhaust steam steam discharge are come together in the main frame steam exhaust device, adopt a cover direct air cooling system, changed the feed pump turbine steam discharge type of cooling.System of the present invention is simple, first little investment, and floor space is little, and water usage is little.
Description of drawings:
Fig. 1 is a structural representation of the present invention
Embodiment
Unite steam valve 2, enter main steam turbine 3 actings through main steam line 1, main vapour from the main steam that boiler comes, the output shaft of main steam turbine 3 drives generators 5 generatings by coupling 4.Exhaust steam after the acting through main steam turbine blow-off line 6, enter main steam turbine steam exhaust device 7, again through direct air cooling blow-off line 8, enter direct air cooling radiator 9, with the air surface heat exchange, the exhaust steam condensation is after direct air cooling condensing water conduit 10, enter main frame hot well 11.
Unite steam valve 13, enter feed pump turbine 14 actings through steam line 12, the feed pump turbine of feed pump turbine from another road steam that main steam turbine draws gas, it is boiler pump water that the mechanical output shaft of feed pump turbine 14 drives boiler feed pumps 16 through coupling 15; Exhaust steam after the acting through feed pump turbine blow-off line 17, feed pump turbine steam discharge butterfly valve 18, enter main steam turbine steam exhaust device 7.
The feed pump turbine blow-off line is provided with electronic steam discharge butterfly valve 18, is used for when unit starting or feed pump turbine when stopping transport, thereby plays at above-mentioned two working stages the effect of main steam turbine group with feed pump turbine group partition.
Described feed pump turbine 14 be back pressure at 7-55 kPa, the warning multiplication of voltage is 65 kPas, shuts down back pressure and be 65-75 kPa feed pump turbine.
Feed pump turbine exhaust steam steam discharge and main steam turbine exhaust steam steam discharge are come together in main steam turbine steam exhaust device 7, adopt a cover direct air cooling system 9, two systems are organically combined, cooling has changed the feed pump turbine steam discharge type of cooling together, and system is simple.Native system is applicable to the thermal power plant Direct Air-cooled Unit, is particularly suitable for 300,000 and above Direct Air-cooled Unit.
Claims (3)
1. the in line system of the exhaust steam of a Direct Air-cooled Unit feed pump turbine, comprise main steam line (1), main vapour associating steam valve (2), main steam turbine (3), coupling (4), generator (5), main steam turbine blow-off line (6), main steam turbine steam exhaust device (7), direct air cooling blow-off line (8), direct air cooling radiator (9), direct air cooling condensing water conduit (10) and main frame hot well (11), it is characterized in that, the steam input pipe road (12) of feed pump turbine is connected together through feed pump turbine associating steam valve (13) and feed pump turbine (14), the mechanical output shaft of feed pump turbine (14) is mechanically coupled together by coupling (15) and boiler feed pump (16), feed pump turbine blow-off line (17) is connected together with main steam turbine steam exhaust device (7), and feed pump turbine blow-off line (17) is provided with feed pump turbine steam discharge butterfly valve (18).
2. the in line system of the exhaust steam of Direct Air-cooled Unit feed pump turbine according to claim 1; it is characterized in that; described feed pump turbine (14) be back pressure at 7-50 kPa, the warning multiplication of voltage is 60 kPas, shuts down back pressure and be 65-70 kPa feed pump turbine.
3. the in line system of the exhaust steam of Direct Air-cooled Unit feed pump turbine according to claim 1 and 2, it is characterized in that, described feed pump turbine steam discharge butterfly valve (18) is an electric butterfly valve, and this butterfly valve described main steam turbine (3) start up period or operation-stopping stage be in automatic closed condition, thereby play the effect that main steam turbine group and feed pump turbine group is cut off at above-mentioned two working stages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010184985 CN101852105A (en) | 2010-05-25 | 2010-05-25 | Steam exhaust direct-discharge system of feed pump turbine of direct air-cooling unit |
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| CN 201010184985 CN101852105A (en) | 2010-05-25 | 2010-05-25 | Steam exhaust direct-discharge system of feed pump turbine of direct air-cooling unit |
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| CN101852105A true CN101852105A (en) | 2010-10-06 |
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| CN 201010184985 Pending CN101852105A (en) | 2010-05-25 | 2010-05-25 | Steam exhaust direct-discharge system of feed pump turbine of direct air-cooling unit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288043A (en) * | 2011-08-01 | 2011-12-21 | 山西省电力勘测设计院 | Direct air cooling system and method for arranging inter-column isolating valve |
| CN102322748A (en) * | 2011-08-01 | 2012-01-18 | 山西省电力勘测设计院 | Direct air-cooling system with peak cooling device |
| CN102322307A (en) * | 2011-06-18 | 2012-01-18 | 山西省电力勘测设计院 | Condensed water automatic discharging system of water-feeding pump steam turbine of direct air cooling unit |
| CN102393149A (en) * | 2011-11-15 | 2012-03-28 | 东方希望重庆水泥有限公司 | Thermotechnical linkage power system utilizing waste heat of cement production system and using method thereof |
| CN104405457A (en) * | 2014-11-28 | 2015-03-11 | 中国华能集团公司 | Energy cascade utilization system of back pressure turbine heating |
| CN106050320A (en) * | 2016-07-13 | 2016-10-26 | 东方电气集团东方汽轮机有限公司 | Water supply system of 1000MW grade air cooling steam turbine power generating unit and last-stage moving blade of water feed pump steam turbine |
| CN106246261A (en) * | 2016-08-31 | 2016-12-21 | 中电投宁夏能源铝业中卫热电有限公司 | The system of the 350MW supercritical in line Air-Cooling Island of double extraction unit feed pump turbine and method of work thereof |
| CN106368751A (en) * | 2016-08-31 | 2017-02-01 | 中电投宁夏能源铝业中卫热电有限公司 | Back pressure interference suppression method for system of 350 MW supercritical double-extraction unit water-feeding pump steam turbine direct discharging air cooling island |
| CN110295957A (en) * | 2019-07-09 | 2019-10-01 | 北京龙威发电技术有限公司 | A kind of feed pump turbine system |
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| JPH0466703A (en) * | 1990-07-04 | 1992-03-03 | Mitsubishi Heavy Ind Ltd | Power generation plant |
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2010
- 2010-05-25 CN CN 201010184985 patent/CN101852105A/en active Pending
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| JPH0466703A (en) * | 1990-07-04 | 1992-03-03 | Mitsubishi Heavy Ind Ltd | Power generation plant |
| JP2002371807A (en) * | 2001-06-15 | 2002-12-26 | Mitsubishi Heavy Ind Ltd | Turbine equipment and steam converting device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322307A (en) * | 2011-06-18 | 2012-01-18 | 山西省电力勘测设计院 | Condensed water automatic discharging system of water-feeding pump steam turbine of direct air cooling unit |
| CN102288043A (en) * | 2011-08-01 | 2011-12-21 | 山西省电力勘测设计院 | Direct air cooling system and method for arranging inter-column isolating valve |
| CN102322748A (en) * | 2011-08-01 | 2012-01-18 | 山西省电力勘测设计院 | Direct air-cooling system with peak cooling device |
| CN102288043B (en) * | 2011-08-01 | 2012-10-10 | 山西省电力勘测设计院 | Direct air cooling system for arranging inter-column isolating valve |
| CN102393149A (en) * | 2011-11-15 | 2012-03-28 | 东方希望重庆水泥有限公司 | Thermotechnical linkage power system utilizing waste heat of cement production system and using method thereof |
| CN102393149B (en) * | 2011-11-15 | 2013-10-30 | 东方希望重庆水泥有限公司 | Thermotechnical linkage power system utilizing waste heat of cement production system and using method thereof |
| CN104405457A (en) * | 2014-11-28 | 2015-03-11 | 中国华能集团公司 | Energy cascade utilization system of back pressure turbine heating |
| CN106050320A (en) * | 2016-07-13 | 2016-10-26 | 东方电气集团东方汽轮机有限公司 | Water supply system of 1000MW grade air cooling steam turbine power generating unit and last-stage moving blade of water feed pump steam turbine |
| CN106246261A (en) * | 2016-08-31 | 2016-12-21 | 中电投宁夏能源铝业中卫热电有限公司 | The system of the 350MW supercritical in line Air-Cooling Island of double extraction unit feed pump turbine and method of work thereof |
| CN106368751A (en) * | 2016-08-31 | 2017-02-01 | 中电投宁夏能源铝业中卫热电有限公司 | Back pressure interference suppression method for system of 350 MW supercritical double-extraction unit water-feeding pump steam turbine direct discharging air cooling island |
| CN106368751B (en) * | 2016-08-31 | 2017-12-15 | 中电投宁夏能源铝业中卫热电有限公司 | The interference suppressing method of the system of the overcritical in line Air-Cooling Islands of double extraction unit feed pump turbine of 350MW |
| CN110295957A (en) * | 2019-07-09 | 2019-10-01 | 北京龙威发电技术有限公司 | A kind of feed pump turbine system |
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Application publication date: 20101006 |