CN103016082A - 300MW-capacity-level low vacuum heat supply steam turbine system and adjusting method thereof - Google Patents
300MW-capacity-level low vacuum heat supply steam turbine system and adjusting method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of thermoelectricity, and relates to a 300MW-capacity-level low vacuum heat supply steam turbine system and an adjusting method thereof. The system consists of a 300MW-capacity-level low vacuum heat supply steam turbine generator set and a power plant cold end and heat supply load coupling adjusting system. A steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a steam turbine low-pressure cylinder I, a steam turbine low-pressure cylinder II and a generator are uniaxially arranged in the steam turbine generator set. In the heating period, the back pressure of the two low-pressure cylinders rises, and a steam turbine set runs under low vacuum; steam is uniformly divided into two strands when entering a communicating pipe at the front of the two low-pressure cylinders, so that the flow of each low-pressure cylinder is half the flow of the low-pressure cylinder of the 300MW-capacity-level steam turbine in the prior art, and the flow is greatly reduced; the length of the last-stage blade is shortened, the adjusting range of back pressure is expanded, and the safety of the system is improved; and in the non-heating period, the steam turbine set runs under the straight condensing condition. The invention is applicable for a 300MW-capacity-level combined heat and power steam turbine set to implement low vacuum heat supply.
Description
Technical field
The invention belongs to the pyroelectric technology field, particularly a kind of 300MW capacitance grade Heat Supplying with Low Vacuum turbine system and regulating method thereof.
Background technique
The cogeneration of heat and power of " Energy Conservation Law of the People's Republic of China " Chinese Home encourage growth, central heat supply improve the utilization ratio of thermoelectric unit.Point out also in " country is about the regulation of Cogeneration " that cogeneration of heat and power has energy saving, improves environment, improves the comprehensive benefits such as heating quality, the supply that increases electric power, the construction of thermoelectricity plant is the important measures of Urban Governance pollution of atmosphere and raising energy utilization rate, being the important component part of central heat supply, is the public welfare Infrastructure that improves people's living standard.The vapour condenser low-vacuum-operating, the mode of circulating water heating is a kind of as the central heat supply mode, and large and high characteristics of efficiency of energy utilization more and more come into one's own with its heating load.The principle of steam turbine rough vacuum circulating water heating is to reduce the degree of vacuum of vapour condenser, improves the exhaust temperature of steam turbine, is hot user's heat supply as the heating water directly with the circulating water of vapour condenser, realizes the purpose of steam turbine rough vacuum circulating water heating.After steam turbine changes Heat Supplying with Low Vacuum into, in fact just become " cooling tower " of thermoelectricity plant hot user of heat supply phase, the exhausted spare heat of steam turbine has obtained effective utilization, has avoided cold source energy, has greatly improved the comprehensive utilization ratio of thermoelectricity plant's energy.Yet the unit of at present steam turbine rough vacuum circulating water heating is by Small And Medium Capacity pure condensate Transformation of Unit, its maximum can realize that capacity levels is the 100MW level, be difficult to then realize that its main cause is that 300MW capacitance grade unit low pressure (LP) cylinder single cylinder arranges that exhaust steam flow is large for 300MW capacitance grade unit, exhaust stage blade is high, during Heat Supplying with Low Vacuum, exhaust steam pressure raises, and directly affects the thermal expansion of unit, the indexs such as differential expansion, vibration, string axle, unit can not safe and stable operation.
Therefore, in order to solve the rough vacuum circulating water heating problem of 300MW capacitance grade steam turbine set, must arrange from the low pressure (LP) cylinder that changes 300MW capacitance grade unit and start with, carry out the design of heat supply steam turbine group, obtain 300MW capacitance grade Heat Supplying with Low Vacuum turbine system.
Summary of the invention
The object of the invention is to solve the 300MW capacitance grade steam turbine set low-vacuum-operating described in the background technique and utilize the problem of circulating water heating, for 300MW level capacity unit Heat Supplying with Low Vacuum provides technical support, proposed a kind of 300MW capacitance grade Heat Supplying with Low Vacuum turbine system and regulating method thereof, its technological scheme is:
300MW capacitance grade Heat Supplying with Low Vacuum turbine system is made of 300MW capacitance grade Heat Supplying with Low Vacuum Turbo-generator Set and power plant's cold junction and heating demand coupling regulating system, in the described 300MW capacitance grade Heat Supplying with Low Vacuum Turbo-generator Set, steam turbine high-pressure cylinder 1, Steam Turbine Through IP Admission 2, steam turbine I low pressure (LP) cylinder 3, steam turbine II low pressure (LP) cylinder 4 and generator 5 single shafts are arranged; Steam turbine high-pressure cylinder 1 and Steam Turbine Through IP Admission 2 are closed cylinder and are arranged, the axle of Steam Turbine Through IP Admission 2 is connected with the axle of steam turbine I low pressure (LP) cylinder 3 one sides with coupling I 7, the axle of steam turbine I low pressure (LP) cylinder 3 opposite sides is connected with the axle of steam turbine II low pressure (LP) cylinder 4 one sides with coupling II 8, and the axle of steam turbine II low pressure (LP) cylinder 4 opposite sides is connected with the axle of generator 5 with coupling III 9;
The high-pressure cylinder steam inlet of steam turbine high-pressure cylinder 1 is connected with boiler main steam tube 15, the intermediate pressure cylinder steam inlet of Steam Turbine Through IP Admission 2 is connected with boiler reheated steam hot arc pipe 16, cold section pipe 17 of the high-pressure cylinder steam-expelling port of steam turbine high-pressure cylinder 1 and boiler reheated steam is connected, the II LP steam admission of the I LP steam admission of steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4 all is connected with the intermediate pressure cylinder steam-expelling port of Steam Turbine Through IP Admission 2, the I low pressure (LP) cylinder steam-expelling port of steam turbine I low pressure (LP) cylinder 3 all is connected with the vapour condenser steam inlet of vapour condenser 6 with the II low pressure (LP) cylinder steam-expelling port of steam turbine II low pressure (LP) cylinder 4, and the condenser condensed water outlet of vapour condenser 6 is connected with power plant thermal system condensate pipe 18;
In described power plant cold junction and the heating demand coupling regulating system, the outlet of the vapour condenser cold side of vapour condenser 6 is connected with the heat supply network water pipe with the water intake of circulating water pump I 12 and is connected, the vapour condenser cold side import of vapour condenser 6 is connected with the water outlet of circulating water pump II 13, the water intake of circulating water pump II 13 is connected with heat supply network return pipe 20, the water outlet of circulating water pump I 12 is connected with the cooling tower water intake of cooling tower 10 by valve I 11, and the cooling tower water outlet of cooling tower 10 is connected with heat supply network return pipe 20 by valve II 14;
Described 300MW capacitance grade Heat Supplying with Low Vacuum generator set comprises 300MW, 350MW normal capacity steam turbine and 200MW～400MW non-standard capacity steam turbine;
Described steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4 all adopt the structural configuration of two cylinders, four steam discharges, and namely each low pressure (LP) cylinder has two cylinder bodies that are arranged symmetrically with, and each cylinder body has two steam-expelling ports.
It all is 4kPa～40kPa that the back pressure of described steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4 is transferred scope.
300MW capacitance grade Heat Supplying with Low Vacuum Turbo-generator Set of the present invention has kept the project organization of traditional 300MW capacity unit high-pressure cylinder and intermediate pressure cylinder, be that steam turbine high-pressure cylinder 1 and Steam Turbine Through IP Admission 2 are closed the cylinder layout, main steam enters steam turbine high-pressure cylinder 1 and enter boiler reheater by cold section pipe 17 of boiler reheated steam after the high-pressure cylinder acting, enters Steam Turbine Through IP Admission 2 by boiler reheated steam hot arc pipe 16 after the heat again.After steam is discharged by Steam Turbine Through IP Admission 2, by two low pressure (LP) cylinders that are delivered to connecting tube of intermediate pressure cylinder and two low pressure (LP) cylinders, i.e. steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4.Steam is equally divided into two strands in the connecting tube before entering steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4, because two low pressure (LP) cylinders of unit are divided equally the intermediate pressure cylinder exhaust steam flow, each low pressure (LP) cylinder flow becomes half of existing 300MW capacitance grade turbine low pressure cylinder flow, flow reduces greatly, final blade length shortens, enlarge the backpressure regulation scope, improved Security of the system.Therefore, adopt the steam turbine structure of above-mentioned design, the back pressure of steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4 can satisfy the unit safety operation requirement when reaching 40kPa.
Steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4 are arranged symmetrically with, all from the separately middle part admission of cylinder body, and two ends steam discharge, the structural configuration of formation twin-tub four steam discharges.Low pressure (LP) cylinder back pressure adjustable extent increases, and at heating period, back pressure can be brought up to 40kPa, realizes Heat Supplying with Low Vacuum, at non-heating period, can adjust low pressure (LP) cylinder back pressure value with reference to ambient temperature, realizes the pure condensate generating.Steam enters vapour condenser 6 condensations after the steam-expelling port of steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4 is discharged.Turbine discharge condensation process heating heat supply network supplies water.The axle of the steam turbine high-pressure cylinder 1 of unit, Steam Turbine Through IP Admission 2, steam turbine I low pressure (LP) cylinder 3, steam turbine II low pressure (LP) cylinder 4 and generator 5 is linked together by coupling I 7, coupling II 8 and coupling III 9, and single shaft is arranged.Regulate the unit back pressure by cooling tower 10, circulating water pump I 12 and valve I 11 and valve II 14, and then realize the adjusting of heating demand.
The regulating method of 300MW capacitance grade Heat Supplying with Low Vacuum turbine system:
One, at non-heating period, the excision heat supply network, valve I 11 and valve II 14 are all opened, the back pressure of regulating steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4 by the flow of adjusting circulating water pump I 12 and circulating water pump II 13, make back pressure not be higher than 20kPa, steam turbine set pure condensate operation;
Two, at heating period, open heat supply network, reduce the open degree of valve I 11 and valve II 14, the hot water that flows out from the vapour condenser cold side outlet of condenser 6 enters heat supply network, heating network operation, regulate circulating water pump II 13 flows, so that the backpressure rising of the steam turbine I low pressure (LP) cylinder 3 of steam turbine set and steam turbine II low pressure (LP) cylinder 4 is to 20kPa～40kPa, the steam turbine set low-vacuum-operating;
When the heat load changes in demand, carry out as follows the adjustment of heating demand:
A. when the heat load demand increases, turn the flow of circulating water pump I 12 down, reduce simultaneously the open degree of valve I 11 and valve II 14, the heat supply network supply water temperature raises and the heat supply network water supply flow becomes large, the heat supply network return water temperature raises, and the steam turbine I low pressure (LP) cylinder 3 of steam turbine set and the backpressure rising of steam turbine II low pressure (LP) cylinder 4 are to 30kPa～40kPa scope and keep stable;
B. when the heat load demand reduces, tune up the flow of circulating water pump I 12, the open degree of while intensifying valve I 11 and valve II 14, the reduction of heat supply network supply water temperature and hot net water quantitative change are little, the heat supply network return water temperature reduces, and the steam turbine I low pressure (LP) cylinder 3 of steam turbine set and the back pressure of steam turbine II low pressure (LP) cylinder 4 are reduced to 20kPa～30kPa scope and keep stable.
Beneficial effect of the present invention is, the present invention adopts the arrangement of two low pressure (LP) cylinder settings and low pressure (LP) cylinder twin-tub four steam discharges, steam is equally divided into two strands in the connecting tube of intermediate pressure cylinder and low pressure (LP) cylinder, with the single low pressure (LP) cylinder admission of the 300MW steam turbine set of prior art and structural parameter contrast, because two low pressure (LP) cylinders of unit of the present invention are divided equally the intermediate pressure cylinder exhaust steam flow, each low pressure (LP) cylinder flow becomes half of existing 300MW capacitance grade turbine low pressure cylinder flow, flow reduces greatly, final blade length shortens, increased the adjustable extent of unit low pressure (LP) cylinder back pressure, when reaching 40kPa, back pressure also can satisfy the safe operation requirement, improve Security of the system, solved the problem that 300MW capacitance grade steam turbine set can not carried out Heat Supplying with Low Vacuum.
Description of drawings
Fig. 1 is 300MW capacitance grade Heat Supplying with Low Vacuum turbine system schematic representation.
Among the figure, 1--steam turbine high-pressure cylinder, 2--Steam Turbine Through IP Admission, 3--steam turbine I low pressure (LP) cylinder, 4--steam turbine II low pressure (LP) cylinder, 5--generator, 6--vapour condenser, 7--coupling I, 8--coupling II, 9--coupling III, 10--cooling tower, 11--valve I, 12--circulating water pump I, 13--circulating water pump II, 14--valve II, 15--boiler main steam tube, 16--boiler reheated steam hot arc pipe, cold section pipe of 17--boiler reheated steam, 18--power plant thermal system condensate pipe, 19--heat supply network water pipe, 20--heat supply network return pipe.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and instantiation.
Fig. 1 is 300MW capacitance grade Heat Supplying with Low Vacuum turbine system schematic representation.
300MW capacitance grade Heat Supplying with Low Vacuum turbine system is made of 300MW capacitance grade Heat Supplying with Low Vacuum Turbo-generator Set and power plant's cold junction and heating demand coupling regulating system.In the 300MW capacitance grade Heat Supplying with Low Vacuum Turbo-generator Set, steam turbine high-pressure cylinder 1, Steam Turbine Through IP Admission 2, steam turbine I low pressure (LP) cylinder 3, steam turbine II low pressure (LP) cylinder 4 and generator 5 single shafts are arranged.Steam turbine high-pressure cylinder 1 and Steam Turbine Through IP Admission 2 are closed cylinder and are arranged, the axle of Steam Turbine Through IP Admission 2 is connected with the axle of steam turbine I low pressure (LP) cylinder 3 one sides with coupling I 7, the axle of steam turbine I low pressure (LP) cylinder 3 opposite sides is connected with the axle of steam turbine II low pressure (LP) cylinder 4 one sides with coupling II 8, and the axle of steam turbine II low pressure (LP) cylinder 4 opposite sides is connected with the axle of generator 5 with coupling III 9.Heat Supplying with Low Vacuum generator set in the present embodiment is 350MW normal capacity steam turbine.
The high-pressure cylinder steam inlet of steam turbine high-pressure cylinder 1 is connected with boiler main steam tube 15, the intermediate pressure cylinder steam inlet of Steam Turbine Through IP Admission 2 is connected with boiler reheated steam hot arc pipe 16, cold section pipe 17 of the high-pressure cylinder steam-expelling port of steam turbine high-pressure cylinder 1 and boiler reheated steam is connected, the II LP steam admission of the I LP steam admission of steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4 all is connected with the intermediate pressure cylinder steam-expelling port of Steam Turbine Through IP Admission 2, the I low pressure (LP) cylinder steam-expelling port of steam turbine I low pressure (LP) cylinder 3 all is connected with the vapour condenser steam inlet of vapour condenser 6 with the II low pressure (LP) cylinder steam-expelling port of steam turbine II low pressure (LP) cylinder 4, and the condenser condensed water outlet of vapour condenser 6 is connected with power plant thermal system condensate pipe 18.Steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4 all adopt the structural configuration of two cylinders, four steam discharges.
In power plant's cold junction and the heating demand coupling regulating system, the outlet of the vapour condenser cold side of vapour condenser 6 is connected with the heat supply network water pipe with the water intake of circulating water pump I 12 and is connected, the vapour condenser cold side import of vapour condenser 6 is connected with the water outlet of circulating water pump II 13, the water intake of circulating water pump II 13 is connected with heat supply network return pipe 20, the water outlet of circulating water pump I 12 is connected with the cooling tower water intake of cooling tower 10 by valve I 11, and the cooling tower water outlet of cooling tower 10 is connected with heat supply network return pipe 20 by valve II 14.
It all is 4kPa～40kPa that the back pressure of steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4 is transferred scope.
The regulating method of 300MW capacitance grade Heat Supplying with Low Vacuum turbine system is:
One, at non-heating period, the excision heat supply network, valve I 11 and valve II 14 are all opened, the back pressure of regulating steam turbine I low pressure (LP) cylinder 3 and steam turbine II low pressure (LP) cylinder 4 by the flow of adjusting circulating water pump I 12 and circulating water pump II 13, make back pressure not be higher than 20kPa, steam turbine set pure condensate operation;
Two, at heating period, open heat supply network, reduce the open degree of valve I 11 and valve II 14, the hot water that flows out from the vapour condenser cold side outlet of condenser 6 enters heat supply network, heating network operation, regulate circulating water pump II 13 flows, so that the backpressure rising of the steam turbine I low pressure (LP) cylinder 3 of steam turbine set and steam turbine II low pressure (LP) cylinder 4 is to 20kPa～40kPa, the steam turbine set low-vacuum-operating;
When the heat load changes in demand, carry out as follows the adjustment of heating demand:
A. when the heat load demand increases, turn the flow of circulating water pump I 12 down, reduce simultaneously the open degree of valve I 11 and valve II 14, the heat supply network supply water temperature raises and the heat supply network water supply flow becomes large, the heat supply network return water temperature raises, and the steam turbine I low pressure (LP) cylinder 3 of steam turbine set and the backpressure rising of steam turbine II low pressure (LP) cylinder 4 are to 30kPa～40kPa scope and keep stable;
B. when the heat load demand reduces, tune up the flow of circulating water pump I 12, the open degree of while intensifying valve I 11 and valve II 14, the reduction of heat supply network supply water temperature and hot net water quantitative change are little, the heat supply network return water temperature reduces, and the steam turbine I low pressure (LP) cylinder 3 of steam turbine set and the back pressure of steam turbine II low pressure (LP) cylinder 4 are reduced to 20kPa～30kPa scope and keep stable.
The present invention is applicable to 300MW capacitance grade co-generation turbine group and implements Heat Supplying with Low Vacuum.
The above; only for the better embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (5)
1. 300MW capacitance grade Heat Supplying with Low Vacuum turbine system, it is characterized in that, 300MW capacitance grade Heat Supplying with Low Vacuum turbine system is made of 300MW capacitance grade Heat Supplying with Low Vacuum Turbo-generator Set and power plant's cold junction and heating demand coupling regulating system, in the described 300MW capacitance grade Heat Supplying with Low Vacuum Turbo-generator Set, steam turbine high-pressure cylinder (1), Steam Turbine Through IP Admission (2), steam turbine I low pressure (LP) cylinder (3), steam turbine II low pressure (LP) cylinder (4) and generator (5) single shaft are arranged, steam turbine high-pressure cylinder (1) and Steam Turbine Through IP Admission (2) are closed cylinder and are arranged, the axle of Steam Turbine Through IP Admission (2) is connected with the axle of steam turbine I low pressure (LP) cylinder (3) one sides with coupling I (7), the axle of steam turbine I low pressure (LP) cylinder (3) opposite side is connected with the axle of steam turbine II low pressure (LP) cylinder (4) one sides with coupling II (8), and the axle of steam turbine II low pressure (LP) cylinder (4) opposite side is connected with the axle of generator (5) with coupling III (9);
The high-pressure cylinder steam inlet of steam turbine high-pressure cylinder (1) is connected with boiler main steam tube (15), the intermediate pressure cylinder steam inlet of Steam Turbine Through IP Admission (2) is connected with boiler reheated steam hot arc pipe (16), the high-pressure cylinder steam-expelling port of steam turbine high-pressure cylinder (1) is connected with cold section pipe of boiler reheated steam (17), the II LP steam admission of the I LP steam admission of steam turbine I low pressure (LP) cylinder (3) and steam turbine II low pressure (LP) cylinder (4) all is connected with the intermediate pressure cylinder steam-expelling port of Steam Turbine Through IP Admission (2), the I low pressure (LP) cylinder steam-expelling port of steam turbine I low pressure (LP) cylinder (3) all is connected with the vapour condenser steam inlet of vapour condenser (6) with the II low pressure (LP) cylinder steam-expelling port of steam turbine II low pressure (LP) cylinder (4), and the condenser condensed water outlet of vapour condenser (6) is connected with power plant thermal system condensate pipe (18);
In described power plant cold junction and the heating demand coupling regulating system, the vapour condenser cold side outlet of vapour condenser (6) is connected 19 with the water intake of circulating water pump I (12) with the heat supply network water pipe) be connected, the vapour condenser cold side import of vapour condenser (6) is connected with the water outlet of circulating water pump II (13), the water intake of circulating water pump II (13) is connected with heat supply network return pipe (20), the water outlet of circulating water pump I (12) is connected with the cooling tower water intake of cooling tower (10) by valve I (11), and the cooling tower water outlet of cooling tower (10) is connected with heat supply network return pipe (20) by valve II (14).
2. 300MW capacitance grade Heat Supplying with Low Vacuum turbine system according to claim 1, it is characterized in that described 300MW capacitance grade Heat Supplying with Low Vacuum generator set comprises 300MW, 350MW normal capacity steam turbine and 200MW～400MW non-standard capacity steam turbine.
3. 300MW capacitance grade Heat Supplying with Low Vacuum turbine system according to claim 1 is characterized in that, described steam turbine I low pressure (LP) cylinder (3) and steam turbine II low pressure (LP) cylinder (4) all adopt the structural configuration of two cylinders, four steam discharges.
4. 300MW capacitance grade Heat Supplying with Low Vacuum turbine system according to claim 1 is characterized in that, it all is 4kPa～40kPa that the back pressure of described steam turbine I low pressure (LP) cylinder (3) and steam turbine II low pressure (LP) cylinder (4) is transferred scope.
5. the regulating method of a 300MW capacitance grade Heat Supplying with Low Vacuum turbine system is characterized in that, the regulating method of 300MW capacitance grade Heat Supplying with Low Vacuum turbine system as claimed in claim 1 is:
One, at non-heating period, the excision heat supply network, valve I (11) and valve II (14) are all opened, the back pressure of regulating steam turbine I low pressure (LP) cylinder (3) and steam turbine II low pressure (LP) cylinder (4) by the flow of regulating circulating water pump I (12) and circulating water pump II (13), make back pressure not be higher than 20kPa, steam turbine set pure condensate operation;
Two, at heating period, open heat supply network, reduce the open degree of valve I (11) and valve II (14), the hot water that flows out from the vapour condenser cold side outlet of condenser 6 enters heat supply network, heating network operation, regulate circulating water pump II (13) flow, so that the backpressure rising of the steam turbine I low pressure (LP) cylinder (3) of steam turbine set and steam turbine II low pressure (LP) cylinder (4) is to 20kPa～40kPa, the steam turbine set low-vacuum-operating;
When the heat load changes in demand, carry out as follows the adjustment of heating demand:
A. when the heat load demand increases, turn the flow of circulating water pump I (12) down, reduce simultaneously the open degree of valve I (11) and valve II (14), the heat supply network supply water temperature raises and the heat supply network water supply flow becomes large, the heat supply network return water temperature raises, and the steam turbine I low pressure (LP) cylinder (3) of steam turbine set and the backpressure rising of steam turbine II low pressure (LP) cylinder (4) are to 30kPa～40kPa scope and keep stable;
B. when the heat load demand reduces, tune up the flow of circulating water pump I (12), the open degree of while intensifying valve I (11) and valve II (14), the reduction of heat supply network supply water temperature and hot net water quantitative change are little, the heat supply network return water temperature reduces, and the steam turbine I low pressure (LP) cylinder (3) of steam turbine set and the back pressure of steam turbine II low pressure (LP) cylinder (4) are reduced to 20kPa～30kPa scope and keep stable.
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| CN104482582A (en) * | 2014-12-12 | 2015-04-01 | 华电电力科学研究院 | Fully-adaptive single-rotor low-vacuum circulating water heating system |
| CN105019957A (en) * | 2015-07-27 | 2015-11-04 | 中国能源建设集团广东省电力设计研究院有限公司 | Efficient heat regenerative system and method |
| CN106949521A (en) * | 2017-04-01 | 2017-07-14 | 祝凤娟 | A kind of heat supply remodeling method for realizing the operation of turbine condenser high vacuum |
| CN106949521B (en) * | 2017-04-01 | 2017-12-08 | 晟源高科(北京)科技有限公司 | A kind of heat supply remodeling method for realizing the operation of turbine condenser high vacuum |
| CN109489098A (en) * | 2018-11-22 | 2019-03-19 | 李申强 | A kind of circulating water heating system for large-scale Condensing steam turine |
| CN112432219A (en) * | 2020-11-20 | 2021-03-02 | 西安西热节能技术有限公司 | Double-cold-source efficient heating system suitable for large four-exhaust steam turbine unit |
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