CN103696819B - Steam turbine high low pressure two-stage extraction steam for factories heating arrangement - Google Patents
Steam turbine high low pressure two-stage extraction steam for factories heating arrangement Download PDFInfo
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- CN103696819B CN103696819B CN201310667813.1A CN201310667813A CN103696819B CN 103696819 B CN103696819 B CN 103696819B CN 201310667813 A CN201310667813 A CN 201310667813A CN 103696819 B CN103696819 B CN 103696819B
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Abstract
The invention discloses a kind of steam turbine high low pressure two-stage extraction steam for factories heating arrangement, comprise high-pressure cylinder, intermediate pressure cylinder and low pressure (LP) cylinder, hp by-pass system is provided with between the steam inlet pipe and exhaust steam pipe of high-pressure cylinder, at intermediate pressure cylinder admission install pipeline low-pressure bypass system, the steam line before hp by-pass system is connected with high pressure extraction pipeline; Steam line before low-pressure bypass system is connected with low-pressure pumping steam pipeline.Transform pure condensate Turbo-generator Set as thermal power plant unit, realize that unit generates electricity, heat supply function simultaneously.The maximum amount of drawing gas of unit high pressure steam is 100t/h, the maximum amount of drawing gas of low pressure steam is 130t/h, adds up to the maximum amount of drawing gas to be 230t/h.High and low pressure draws gas by heat supply network after pressure and temperature reducing, is delivered to heat user, can meet the demand of heat user high and low pressure two-stage steam.
Description
Technical field
The present invention relates to condensing steam turbine generator set technical field, especially a kind of 220MW condensing steam turbine generator set realizes high low pressure two-stage extraction steam for factories heating arrangement.
Background technique
Owing to there is the cold source energy of steam discharge in condensing steam turbine generator set, efficiency of energy utilization is lower.The efficiency of energy utilization of the 1000MW condensing steam turbine generator set that the highest current grade, also only reach about 45%, and Liu electricity company 200MW(of the same type is containing the 220MW through the transformation of increase-volume consumption reduction) efficiency of energy utilization of level condensing steam turbine generator group is only about 35%.Because 200MW level condensing steam turbine generator set efficiency of energy utilization is low, energy waste is large; Therefore, from 2005, domestic 200MW level condensing steam turbine generator set carries out heat supply process transformation successively, straight condensing turbine generator set is transformed into heat, electric dual purpose unit.Its structure as shown in Figure 1, the superheated vapor of coming from boiler superheater enters steam turbine high-pressure cylinder 1 by two main steam lines 11, high-pressure cylinder steam discharge after acting drains into boiler reheater by two steam lines 12, steam after reheater heating enters Steam Turbine Through IP Admission 2 through two steam lines 21 and does work, / 3rd of a steam total amount after intermediate pressure cylinder 2 does work enters and intermediate pressure cylinder low-pressure section (low pressure (LP) cylinder 3), accounting for the steam of total amount 2/3rds in addition by draining into low pressure (LP) cylinder 4 and 5 connecting tube 22, continuing acting.High, medium and low cylinder pressure and generator coaxle, by the expansion work of steam in cylinder, pushing turbine macro-axis rotates, thus drive electrical generators generating.Conveniently unit starting and accident treatment, arranges hp by-pass system (being equivalent to short circuit high-pressure cylinder) between high-pressure cylinder steam inlet pipe and exhaust steam pipe, carries out hp by-pass system carry out controlling, regulating high pressure turbine by steam flow by high pressure turbine by valve 13; At intermediate pressure cylinder admission install pipeline low-pressure bypass system (being equivalent to short circuit intermediate pressure cylinder, low pressure (LP) cylinder), controlled by low voltage bypass valve 23, regulate low voltage bypass flow.During normal operation, high pressure turbine by valve 13 and low pressure bypass valve arrangement 23 are all closed, only when unit starting, stopping or accident, in order to ensure the safety of unit, open high pressure bypass valve 13 and the steam flow of low voltage bypass valve 23 also by regulating aperture to control high pressure turbine by and low voltage bypass respectively.
The heat supply renovation technique that current 200MW level condensing steam turbine generator group adopts, mainly punched to the connecting tube between low pressure (LP) cylinder by the intermediate pressure cylinder steam discharge at steam turbine and draw gas, the steam extracted out is for urban heating heat supply, extraction pressure 0.25MPa, temperature 245 DEG C, peak rate of flow 200t/h.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose a kind of steam turbine high low pressure two-stage extraction steam for factories heating arrangement, power generation and heat supply carries out simultaneously, and heating load is large.
In order to realize foregoing invention object, the invention provides following technological scheme: a kind of steam turbine high low pressure two-stage extraction steam for factories heating arrangement, comprise high-pressure cylinder, intermediate pressure cylinder and low pressure (LP) cylinder, hp by-pass system is provided with between the steam inlet pipe and exhaust steam pipe of high-pressure cylinder, at intermediate pressure cylinder admission install pipeline low-pressure bypass system, the steam line before hp by-pass system is connected with high pressure extraction pipeline; Steam line before low-pressure bypass system is connected with low-pressure pumping steam pipeline.
Further, described high pressure extraction pipeline is provided with high pressure extraction power door operation and high pressure steam converter valve.
Further, described low-pressure pumping steam pipeline is provided with low-pressure pumping steam power door operation and low pressure steam converter valve.
Further, described hp by-pass system is high pressure bypass valve.
Further, described low-pressure bypass system is low voltage bypass valve.
Compared with prior art, the present invention has the following advantages: transform pure condensate Turbo-generator Set as thermal power plant unit, realizes that unit generates electricity simultaneously, heat supply function.The maximum amount of drawing gas of unit high pressure steam is 100t/h, the maximum amount of drawing gas of low pressure steam is 130t/h, adds up to the maximum amount of drawing gas to be 230t/h.High and low pressure draws gas by heat supply network after pressure and temperature reducing, is delivered to heat user, can meet the demand of heat user high and low pressure two-stage steam.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art;
Fig. 2 is structural representation of the present invention.
Embodiment
Describe the present invention below in conjunction with accompanying drawing, the description of this part is only exemplary and explanatory, should not have any restriction to protection scope of the present invention.
A kind of steam turbine high low pressure two-stage extraction steam for factories heating arrangement as shown in Figure 2, the superheated vapor of coming from boiler superheater enters steam turbine high-pressure cylinder 1 by two main steam lines 11, high-pressure cylinder steam discharge after acting drains into boiler reheater by two steam lines 12, steam after reheater heating enters Steam Turbine Through IP Admission 2 through two steam lines 21 and does work, / 3rd of a steam total amount after intermediate pressure cylinder 2 does work enters and intermediate pressure cylinder low-pressure section (low pressure (LP) cylinder 3), account for the steam of total amount 2/3rds in addition by draining into low pressure (LP) cylinder 4 and 5 connecting tube 22, continue acting.High, medium and low cylinder pressure and generator coaxle, by the expansion work of steam in cylinder, pushing turbine macro-axis rotates, thus drive electrical generators generating.Conveniently unit starting and accident treatment, arranges hp by-pass system (being equivalent to short circuit high-pressure cylinder) between high-pressure cylinder steam inlet pipe and exhaust steam pipe, carries out hp by-pass system carry out controlling, regulating high pressure turbine by steam flow by high pressure turbine by valve 13; At intermediate pressure cylinder admission install pipeline low-pressure bypass system (being equivalent to short circuit intermediate pressure cylinder, low pressure (LP) cylinder), controlled by low voltage bypass valve 23, regulate low voltage bypass flow.During normal operation, high pressure turbine by valve 13 and low pressure bypass valve arrangement 23 are all closed, only when unit starting, stopping or accident, in order to ensure the safety of unit, open high pressure bypass valve 13 and the steam flow of low voltage bypass valve 23 also by regulating aperture to control high pressure turbine by and low voltage bypass respectively.
Steam line before high pressure bypass valve 13 picks out high pressure extraction pipeline 14, by being supplied to heat supply network for industrial heat user after high pressure extraction power door operation 15 and high pressure steam converter valve 16, vapor pressure 10MPa, temperature 500 DEG C, peak rate of flow 100t/h after pressure and temperature reducing; Steam line before low voltage bypass valve 23 picks out low-pressure pumping steam pipeline 24, uses, vapor pressure 1.3MPa, temperature 320 DEG C, peak rate of flow 130t/h after pressure and temperature reducing by being supplied to heat supply network heat supply user after low-pressure pumping steam power door operation 25 and low pressure steam converter valve 26.
This heat supply process modification scheme is different from the heat supply process modification scheme that current domestic 200MW level condensing steam turbine generator set adopts, what adopt is the steam line before turbine high-pressure by-pass valve and the steam line before low voltage bypass valve punch draw gas, draw gas after temperature-decreased pressure reducer, be supplied to the industrial heat user of heating network, achieve high pressure and low pressure two-stage extraction steam for factories.
By above technical innovation, transform pure condensate Turbo-generator Set as thermal power plant unit, realize that unit generates electricity, heat supply function simultaneously.The maximum amount of drawing gas of unit high pressure steam is 100t/h, the maximum amount of drawing gas of low pressure steam is 130t/h, adds up to the maximum amount of drawing gas to be 230t/h.High and low pressure draws gas and pass through heat supply network after pressure and temperature reducing, be delivered to heat user, the demand of heat user high and low pressure two-stage steam can be met, compare existing renovation technique and only can supply heating, this technology can meet the diversity of the industrial heat user such as chemical plant, brewery to different pressures grade, temperature requirements, substitute arcola, the small turbine generator set of industrial heat user, reach energy-saving and cost-reducing object.
Claims (3)
1. a steam turbine high low pressure two-stage extraction steam for factories heating arrangement, comprise high-pressure cylinder, intermediate pressure cylinder and low pressure (LP) cylinder, high pressure bypass valve is provided with between the steam inlet pipe and exhaust steam pipe of high-pressure cylinder, at intermediate pressure cylinder admission install pipeline low voltage bypass valve, it is characterized in that: the steam line before high pressure bypass valve is connected with high pressure extraction pipeline; Steam line before low voltage bypass valve is connected with low-pressure pumping steam pipeline.
2. steam turbine high low pressure two-stage extraction steam for factories heating arrangement as claimed in claim 1, is characterized in that: described high pressure extraction pipeline is provided with high pressure extraction power door operation and high pressure steam converter valve.
3. steam turbine high low pressure two-stage extraction steam for factories heating arrangement as claimed in claim 1 or 2, is characterized in that: described low-pressure pumping steam pipeline is provided with low-pressure pumping steam power door operation and low pressure steam converter valve.
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| CN201310667813.1A CN103696819B (en) | 2013-12-07 | 2013-12-07 | Steam turbine high low pressure two-stage extraction steam for factories heating arrangement |
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| CN201310667813.1A CN103696819B (en) | 2013-12-07 | 2013-12-07 | Steam turbine high low pressure two-stage extraction steam for factories heating arrangement |
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| CN103696819A CN103696819A (en) | 2014-04-02 |
| CN103696819B true CN103696819B (en) | 2015-10-28 |
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| CN104594963B (en) * | 2014-12-05 | 2016-09-14 | 东方电气集团东方汽轮机有限公司 | Steam power plant's high pressure industrial heat supply method |
| CN105066214A (en) * | 2015-07-31 | 2015-11-18 | 中能世华(北京)节能科技有限公司 | Steam heating energy saving system |
| CN106523049B (en) * | 2015-09-11 | 2018-03-16 | 上海上电漕泾发电有限公司 | A kind of extracted steam from turbine heating system |
| CN106194295A (en) * | 2016-08-31 | 2016-12-07 | 上海量朝能源科技有限公司 | The coalignment of a kind of fired power generating unit heating parameter and method |
| CN107060916A (en) * | 2016-12-16 | 2017-08-18 | 大唐东北电力试验研究所有限公司 | Cogeneration units depth peak regulation system and method are improved using regenerative apparatus heat supply |
| CN107060917A (en) * | 2016-12-16 | 2017-08-18 | 大唐东北电力试验研究所有限公司 | Cogeneration units depth peak regulation system and method are improved using unit bypass heat supply |
| CN108730765B (en) * | 2017-04-25 | 2020-04-07 | 中国石化工程建设有限公司 | Steam system energy-saving device and method |
| CN107420139B (en) * | 2017-07-26 | 2023-09-01 | 华电电力科学研究院有限公司 | Low-pressure cylinder cooling steam device and operation method |
| CN110030608A (en) * | 2018-11-22 | 2019-07-19 | 国电电力发展股份有限公司大连开发区热电厂 | Thermoelectricity based on height bypass combined heat mode decouples system and method |
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| JP2007205169A (en) * | 2006-01-31 | 2007-08-16 | Hitachi Ltd | Energy supply system and energy supply method |
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Inventor after: Tang Junsheng Inventor after: Mai Yongjun Inventor after: Wu Qiang Inventor after: Wang Qiang Inventor after: Chen Xianhui Inventor after: Huang Jichang Inventor after: Lin Qiang Inventor before: Tang Junsheng Inventor before: Chen Xianhui Inventor before: Wu Qiang Inventor before: Wang Qiang Inventor before: Huang Jichang Inventor before: Lin Qiang |
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Free format text: CORRECT: INVENTOR; FROM: TANG JUNSHENG CHEN XIANHUI WU QIANG WANG QIANG HUANG JICHANG LIN QIANG TO: TANG JUNSHENG MAI YONGJUN WU QIANG WANG QIANG CHEN XIANHUI HUANG JICHANG LIN QIANG |
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