CN103527270A - Steam turbine thermalized steam flow single-reheat power and power co-production thermal system - Google Patents
Steam turbine thermalized steam flow single-reheat power and power co-production thermal system Download PDFInfo
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- CN103527270A CN103527270A CN201310475858.9A CN201310475858A CN103527270A CN 103527270 A CN103527270 A CN 103527270A CN 201310475858 A CN201310475858 A CN 201310475858A CN 103527270 A CN103527270 A CN 103527270A
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- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention relates to a steam turbine thermalized steam flow single-reheat power and power co-production thermal system. According to principles of a thermal power plant and by means of capacity-increasing heating energy-saving transformation of a condensing steam turbine or adjusting steam extraction of a heat supply turbine, internally-thermalized steam flow or externally-thermalized steam flow of a steam turbine of a coal-fired power plant serves as a power steam source of a thermalization peak regulation turbine generator set after single-reheat; by means of control and switching of valves and on the basis that operation functions of an original steam turbine of the coal-fired power plant are not influenced, the condensing steam turbine achieves the function of enhancing backheating effect, a power supply unit achieves the function of stabilizing thermalization load, and therefore potentials of a steam turbine generator unit of the coal-fired power plant are fully developed; the principle that reheat integration action between the thermalized steam flow of the steam turbine and steam improves circulating thermal efficiency is fully used, a thermodynamic cycle of the coal-fired power plant is improved, and the aim of large-scale energy conservation is achieved. The steam turbine generator unit reconstructed or newly built by means of the method can obtain considerable comprehensive benefits in energy conservation and emission reduction of the coal-fired power plant.
Description
Technical field
The present invention relates to a kind of heat power generating system, particularly thermodynamic system is produced in a kind of steam turbine thermalization steam flow single reheat electricity Electricity Federation.
Background technique
" 12 " planning has proposed energy-conservation and two restrictive targets of reduction of discharging to China's power industry; fired power generating unit is in the energy resource structure of Future in China; still account for more than 60%; along with the raising of energy structure optimizing and environmental protection requirement, further the requirement of energy-saving and emission-reduction is more and more higher, difficulty is increasing.
Greatly develop the cogeneration of heat and power of high efficient and reliable and the important means that central heating system has become city energy-conserving and environment-protective.Also be the extensive energy-conservation effective ways in traditional thermal power plant, wherein changing original condensed steam type unit into heat supply unit is to realize cogeneration of heat and power and central heat supply; Heat supply unit keeps reasonable operating conditions, and performance thermalization steam flow potential is the current engineering problem that needs solution.But.Owing to no matter being that condensed steam type Transformation of Unit becomes heat supply unit, still existing heat supply unit will keep annual total heat-economy, is all subject in various degree the impact of regional energy resource structure, climatic season variation, hot customer charge changes in demand.
Current, according to electric network source structure, adopt the cogeneration of heat and power of 300MW unit more applicable in China, but newly-built large quantities of 300MW heat supply unit needs larger investment and longer construction period, therefore, utilize the 300MW pure condensate unit of domestic a large amount of operations to carry out the heat load demand that heat supply transformation can meet the civilian and regional industry user in growing city.
The condensed steam type 300MW firepower unit of take is example, thermal power plant 300MW unit mesolow divides cylinder pressure many between 0.6-0.9MPa at present, suppose that heating parameter is just close to minute cylinder pressure, adopt in main steam turbine, low pressure (LP) cylinder installs modulating valve additional and control the heat supply shunting of drawing gas on connecting tube.If the vapour source by increase-volume heating steam 200T/h for thermalization peak regulation steam turbine, can increase power 50MW, unit net coal consumption rate is obviously declined.Consider heat load characteristic, general annual heat supply is calculated for 150 days, adopt thermodynamic system of the present invention, for heat supply unit during 215 days during non-heating, can make full use of and bring into play the advantage of thermalization air-flow, realize electric Joint Production function, coordinate final energy consumption electric boiler to substitute the policy guidance of coal heating boiler, therefore, economic benefit and the social benefit of the present invention in the energy-saving and emission-reduction of thermal power plant is very considerable.
Summary of the invention
The present invention be directed to thermal power plant condensing steam turbine increase-volume heating energy-saving transformation and the heat supply steam turbine adjustment problem that stable heating loads of drawing gas, propose a kind of steam turbine thermalization steam flow single reheat electricity Electricity Federation and produced thermodynamic system, utilize the potential of thermal power plant's main steam turbine thermalization steam flow again to generate electricity, played the effect of the synthetic energy-saving discharge-reducing of electric combined cycle and combined heat and power circulation.
Technological scheme of the present invention is: thermodynamic system is produced in a kind of steam turbine thermalization steam flow single reheat electricity Electricity Federation, comprise heat power plant boiler, superheater, main steam turbine, external steam reheater, main generator, thermalization peak regulation steam turbine, thermalization peaking generation machine, vapour condenser, condensate pump, bleeder heater group, feed water pump, hot user, heat supply waterback pump, modulating valve, main generator is driven by main steam turbine, the steam of heat power plant boiler, through superheater, draw, enter into main steam turbine acting, later thermalization steam flow does work, part thermalization air-flow is after the heating of external steam reheater, enter thermalization peak regulation steam turbine as power vapour source, drive thermalization peaking generation machine, form Electricity Federation and produce thermodynamic system, another part thermalization steam flow, through modulating valve, enters hot user, forms cogeneration of heat and power heating power system, after steam after the acting of thermalization peak regulation steam turbine enters vapour condenser, vapour condenser is sent to bleeder heater group by condensate pump by water, hot user returns to water by heat supply waterback pump and enters into bleeder heater group, feed water pump is passed through in the feedwater of bleeder heater group, feedwater is delivered to heat power plant boiler, complete the thermodynamic cycle of working medium, wherein thermalization peak regulation steam turbine and hot user can paired runnings, also can independent operating.
The thermal source of described external steam reheater, introduces waste heat by the flue of heat power plant boiler, then by another flue, gets back to heat power plant boiler.
The vapour source of described thermalization peak regulation steam turbine can be the fresh steam after the heating of external steam reheater from branch's steam flow of superheater; Also can be the secondary steam of main steam turbine bleed steam pipework after the heating of external steam reheater; The secondary steam after the heating of external steam reheater that can also be main steam turbine steam outlet pipe road through branch's steam flow of reheater.After described fresh steam and secondary steam can switch mutually, as the vapour source that enters thermalization peak regulation steam turbine.When described thermalization peak regulation steam turbine is back pressure machine, a thermalization peak regulation turbine discharge part enters hot user, and another part enters into reheater in boiler.
Beneficial effect of the present invention is: thermodynamic system is produced in steam turbine thermalization steam flow single reheat electricity of the present invention Electricity Federation, use Thermal Power Station's principle, the extensive energy-conservation effective ways in thermal power plant are improved in employing, original condensed steam type unit is carried out to increase-volume heat supply transformation, realize Electricity Federation and produce and thermoelectricity co-generating heat supplying; If the original unit in thermal power plant is heat supply unit, the technology of the present invention can keep its rational operating conditions, performance unit thermalization steam flow potential.This technology is aspect thermomechanics, make the thermodynamic cycle of thermal power generation unit more perfect, make unit thermalization steam flow heat load more stable, aspect Economy, after transformation, the complex art economic advantages of thermal power generation unit whole year are more outstanding, will produce the comprehensive benefit of huge thermal power plant energy-saving and emission-reduction.
Accompanying drawing explanation
Fig. 1 is a kind of steam turbine thermalization of the present invention steam flow single reheat electricity Electricity Federation heat production power system principle schematic diagram;
Fig. 2 is a kind of steam turbine thermalization of the present invention steam flow single reheat electricity Electricity Federation heat production power system architecture schematic diagram.
Embodiment
As shown in Figure 1 be a kind of steam turbine thermalization of the present invention steam flow single reheat electricity Electricity Federation heat production power system principle schematic diagram, comprise heat power plant boiler 1, main steam turbine 5,6,7, external steam reheater 3, thermalization peak regulation steam turbine 4, modulating valve 23, bleeder heater group 9, feed water pump 15, hot user 12, pipeline 30,32,33,34,40,41,42 etc.
The steam of heat power plant boiler 1 is by pipeline 34,32,30, enter into 5,6,7 actings of main steam turbine cylinder, the later thermalization steam flow that does work was shunted by connecting tube 40, wherein a part of steam enters into 3 heating of external steam reheater by pipeline 41, heat later steam and enter into 4 actings of thermalization peak regulation steam turbine, this steam flow completes electric Joint Production function; Another part steam by the road 42 and the adjusting by modulating valve 23 enter into hot user's 12 heat supplies, this steam flow completes combined heat and power energy production; After steam after 4 actings of thermalization peak regulation steam turbine enters vapour condenser 8, be sent to bleeder heater group 9, hot user's 12 production is returned to water and is entered into bleeder heater group 9, the feedwater of bleeder heater group 9 is by feed water pump 15, feedwater is delivered to heat power plant boiler 1, complete the thermodynamic cycle of working medium, wherein thermalization peak regulation steam turbine 4 and hot user 12 (heat supply network) can paired runnings, also can independent operating.
A kind of steam turbine thermalization steam flow single reheat electricity Electricity Federation heat production power system architecture schematic diagram as shown in Figure 2, steam from heat power plant boiler 1, after superheater 2 is drawn, part steam enters main steam turbine the first cylinder 5 by pipeline 34, the later steam that does work is by pipeline 31, enter the first reheater 16 heating, after heating, through the second reheater 17, heat again, heat later steam and enter into main steam turbine the second cylinder 6 actings through pipeline 32, the later steam that does work continues acting by introducing main steam turbine the 3rd cylinder 7 connecting tube 30, later steam does work, through outlet pipe 48, enter after vapour condenser 8 condenses into water, by condensate pump 13, boost and send into bleeder heater group 9 by pipeline 47, then after being boosted again by feed water pump 15, by supply pipe 33, send into heat power plant boiler 1, complete the thermodynamic cycle of former Turbo-generator Set.
Steam from heat power plant boiler 1, other a part of steam after superheater 2 is drawn is by pipeline 35, through separating valve 20, enter 3 heating of external steam reheater, heat later steam and through separating valve 53, pipeline 36, separating valve 18, pipeline 28, enter 4 actings of thermalization peak regulation steam turbine successively, this steam is joined with the vapour source from pipeline 29, outlet pipe 37 by thermalization peak regulation steam turbine 4 is drawn, and sends into vapour condenser 8 successively through pipeline 38, separating valve 25; Vapour source from the thermalization peak regulation steam turbine 4 of pipeline 29, branch's steam flow by connecting tube 30 enters into 3 heating of external steam reheater through pipeline 40, separating valve 22, pipeline 41, heat later steam and pass through successively separating valve 19, send into pipeline 29, then, this steam flow enters 4 actings of thermalization peak regulation steam turbine.
Vapour source from pipeline 28, can also through separating valve 49, separating valve 51, enter into 3 heating of external steam reheater by branch's steam flow of reheater 17, heating later steam passes through successively separating valve 50, pipeline 52, sends into pipeline 28, then, this steam flow enters 4 actings of thermalization peak regulation steam turbine.
Vapour source from pipeline 28, separately there is the drawing gas from the second cylinder 6 of main steam turbine of coming, successively by pipeline 54, separating valve 55, separating valve 51, enter into external steam reheater 3 heating, heating later steam passes through successively separating valve 50, pipeline 52, sends into pipeline 28, then, this steam flow enters 4 actings of thermalization peak regulation steam turbine.
Thermalization peaking generation machine 10 is driven by thermalization peak regulation steam turbine 4, and main generator 11 is driven by main steam turbine.
When thermalization peak regulation steam turbine 4 is back pressure machine, shunt after outlet pipe 37, its steam discharge part is successively by pipeline 43, separating valve 24, pipeline 44, pipeline 45, enter into hot user 12, another part of its steam discharge enters into the outlet port of the first reheater 16 successively by separating valve 21, pipeline 39.
When thermalization peak regulation steam turbine 4 is back pressure machine, steam discharge is supplied with hot user, and thermalization effect is more remarkable; When pipeline 28 is carried out in the vapour source of thermalization peak regulation steam turbine 4, the first pressing of thermalization peak regulation steam turbine 4, initial temperature are higher than the vapor pressure from pipeline 29, temperature, and a part of steam discharge when thermalization peak regulation steam turbine 4 is back pressure machine can enter boiler reheater.
The thermal source of external steam reheater 3, introduces waste heat by the flue 26 of heat power plant boiler 1, then by flue 27, gets back to heat power plant boiler 1.
If boiler 1 furnace inner space allows, external steam reheater can be arranged on the inside of boiler 1, as built-in steam reheater.
Hot user's 12 water outlet sends back in bleeder heater group 9 by outlet pipe 46, water pump 14.
The present invention first has realized Electricity Federation and has closed energy production; Second fully realizes combined heat and power energy production and energy production paired running is closed in Electricity Federation; The 3rd to have the power vapour source switchover operation mode of thermalization peak regulation steam turbine in multichannel vapour source flexible.Embodiment shows that the present invention will bring the increase of former thermal power plant unit generation capacity, and the thermomechanics of endless form is perfect, thereby, obtain economic benefit and the social benefit of considerable energy-saving and emission-reduction.
The thermalization peak regulation steam turbine of design, both can be used as condensing steam turbine increase-volume and optimized the energy-saving scheme of thermodynamic system, can be used as again condensing steam turbine heat supply transformation and existing its heat load of heat supply set steady, extend unit thermalization steam flow working time, effective behave of performance heat supply unit technology economy advantage.
Claims (5)
1. thermodynamic system is produced in a steam turbine thermalization steam flow single reheat electricity Electricity Federation, comprise heat power plant boiler (1), superheater (2), main steam turbine, external steam reheater (3), main generator (11), thermalization peak regulation steam turbine (4), thermalization peaking generation machine (10), vapour condenser (8), condensate pump (13), bleeder heater group (9), feed water pump (15), hot user (12), heat supply waterback pump (14), modulating valve (23), main generator (11) is driven by main steam turbine, it is characterized in that, the steam of heat power plant boiler (1), through superheater (2), draw, enter into main steam turbine acting, later thermalization steam flow does work, part thermalization air-flow is after external steam reheater (3) heating, enter thermalization peak regulation steam turbine (4) as power vapour source, drive thermalization peaking generation machine (10), form Electricity Federation and produce thermodynamic system, another part thermalization steam flow, through modulating valve (23), enters hot user (12), forms cogeneration of heat and power heating power system, after steam after thermalization peak regulation steam turbine (4) acting enters vapour condenser (8), vapour condenser (8) is sent to bleeder heater group (9) by condensate pump (13) by water, hot user (12) returns to water by heat supply waterback pump (14) and enters into bleeder heater group (9), the feedwater of bleeder heater group (9) is by feed water pump (15), feedwater is delivered to heat power plant boiler (1), complete the thermodynamic cycle of working medium, wherein thermalization peak regulation steam turbine and hot user (heat supply network) can paired runnings, also can independent operating.
2. thermodynamic system is produced in steam turbine thermalization steam flow single reheat electricity Electricity Federation according to claim 1, it is characterized in that, the thermal source of described external steam reheater (3), flue by heat power plant boiler (1) is introduced waste heat, then by another flue, gets back to heat power plant boiler.
3. thermodynamic system is produced in steam turbine thermalization steam flow single reheat electricity Electricity Federation according to claim 1, it is characterized in that, the vapour source of described thermalization peak regulation steam turbine (4) can be the fresh steam after external steam reheater (3) heating from branch's steam flow of superheater (2); Also can be the secondary steam of main steam turbine bleed steam pipework after external steam reheater (3) heating; The secondary steam after external steam reheater (3) heating that can also be main steam turbine steam outlet pipe road through branch's steam flow of reheater (17).
4. thermodynamic system is produced in steam turbine thermalization steam flow single reheat electricity Electricity Federation according to claim 3, it is characterized in that, after described fresh steam and secondary steam can switch mutually, as the vapour source that enters thermalization peak regulation steam turbine (4).
5. thermodynamic system is produced in steam turbine thermalization steam flow single reheat electricity Electricity Federation according to claim 3, it is characterized in that, when described thermalization peak regulation steam turbine (4) is back pressure machine, thermalization peak regulation steam turbine (4) steam discharge part enters hot user (12), and another part enters into reheater in boiler.
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| CN201310475858.9A CN103527270B (en) | 2013-10-12 | 2013-10-12 | Steam turbine thermalized steam flow single-reheat power and power co-production thermal system |
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| CN201310475858.9A CN103527270B (en) | 2013-10-12 | 2013-10-12 | Steam turbine thermalized steam flow single-reheat power and power co-production thermal system |
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| CN103527270B CN103527270B (en) | 2015-03-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103836604A (en) * | 2014-03-03 | 2014-06-04 | 上海宝钢节能环保技术有限公司 | Novel waste heat recovery combined heating and power system |
| CN108678819A (en) * | 2018-04-23 | 2018-10-19 | 华北电力科学研究院有限责任公司 | A kind of system for realizing thermoelectricity decoupling and quick peak regulation using bypass |
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| US2902831A (en) * | 1958-08-22 | 1959-09-08 | Gen Electric | Governing system for reheat steam turbine powerplant |
| JPH07269306A (en) * | 1994-03-30 | 1995-10-17 | Kawasaki Steel Corp | Recovery method of high temperature condensation |
| JPH11247622A (en) * | 1998-02-27 | 1999-09-14 | Mitsubishi Heavy Ind Ltd | Steam-cooled multi-shaft gas turbine composite plant and operation control method therefor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103836604A (en) * | 2014-03-03 | 2014-06-04 | 上海宝钢节能环保技术有限公司 | Novel waste heat recovery combined heating and power system |
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| CN108678819A (en) * | 2018-04-23 | 2018-10-19 | 华北电力科学研究院有限责任公司 | A kind of system for realizing thermoelectricity decoupling and quick peak regulation using bypass |
| CN108678819B (en) * | 2018-04-23 | 2024-01-26 | 华北电力科学研究院有限责任公司 | System for realizing thermal decoupling and rapid peak shaving by utilizing bypass |
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