CN202008178U - Low-pressure cylinder back pressure rotor interchanging circulating water heat supplying and energy saving system - Google Patents
Low-pressure cylinder back pressure rotor interchanging circulating water heat supplying and energy saving system Download PDFInfo
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- CN202008178U CN202008178U CN2011200170875U CN201120017087U CN202008178U CN 202008178 U CN202008178 U CN 202008178U CN 2011200170875 U CN2011200170875 U CN 2011200170875U CN 201120017087 U CN201120017087 U CN 201120017087U CN 202008178 U CN202008178 U CN 202008178U
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Abstract
The utility model discloses a low-pressure cylinder back pressure rotor interchanging circulating water heat supplying and energy saving system, which comprises a turbine high-pressure cylinder, a turbine low-pressure cylinder, a condenser, a heat supply network circulating pump, a circulating water pump, a heat supply network heater and a cooling tower, and is characterized in that the turbine high-pressure cylinder and the turbine low-pressure cylinder are connected through a connecting pipeline; a butterfly valve A is mounted on the connecting pipeline; both the turbine low-pressure cylinder and the turbine high-pressure cylinder are simultaneously connected with the heat supply network heater through a pipeline; the turbine low-pressure cylinder is connected with the condenser through a low-temperature exhaust pipeline; and the heat supply network heater, the condenser and the cooling tower are connected through a water inlet pipe and a water outlet pipe. By adopting the low-pressure cylinder back pressure rotor interchanging circulating water heat supplying and energy saving system, the improved assembly can achieve the maximum efficiency under winter heating operating condition, and the operating economical efficiency is no less than the level of the original straight condensing operating condition in non-heat supply time, therefore the objective of optimizing the annual operating economic benefit of the assembly is achieved.
Description
(1) technical field
The utility model relates to a kind of Thermal Power Station energy saver, and particularly a kind of low pressure (LP) cylinder back pressure rotor exchanges the circulating water heating energy conserving system.
(2) background technology
The research work of domestic 135～150MW unit low vacuum circulating water heating transformation at present rests on substantially to be carried out in the disposable transformation low pressure rotor and corresponding dividing plate, and the problem that this modification scheme brings is that non-heat supply phase performance driving economy worsens.After the unit transformation under the non-heat supply phase pure condensate operating mode heat consumption rate up to 9435kJ/kW.h, and unit output deficiency, annual overall economic efficiency is not obviously improved, therefore, for heating in the phase low vacuum circulating water heating operating mode turbine discharge waste heat all be utilized, cold source energy is reduced to 0, in the hope of obtaining maximum energy saving economy benefit, the unit heat consumption rate is not higher than the hear rate level under the former pure condensate design conditions under the non-heating period pure condensate operating condition, realize annual overall economic efficiency optimization, propose the imagination that " the two back pressure birotors of low pressure (LP) cylinder exchange " circulating water heating is transformed.
(3) summary of the invention
The utility model provides a kind of and has reduced energy loss and the low pressure (LP) cylinder back pressure rotor that off-energy makes full use of is exchanged the circulating water heating energy conserving system in order to remedy the defective of prior art.
The utility model is achieved by the following technical solution:
A kind of low pressure (LP) cylinder back pressure rotor exchanges the circulating water heating energy conserving system, comprise steam turbine high-pressure cylinder, turbine low pressure cylinder, condenser, pumps for hot water supply net, water circulating pump, heat exchangers for district heating, cooling tower, it is characterized in that: described steam turbine high-pressure cylinder, turbine low pressure cylinder is connected by connecting pipe, dish valve A is installed on its connecting pipe, turbine low pressure cylinder is connected with heat exchangers for district heating by pipeline simultaneously with steam turbine high-pressure cylinder, turbine low pressure cylinder is connected with condenser by the low pressure exhaust pipeline, heat exchangers for district heating, condenser, cooling tower is by advancing, outlet pipe is connected, pumps for hot water supply net and dish valve B are installed on its heat exchangers for district heating water inlet pipe, water circulating pump and butterfly valve E are housed on the condenser inlet channel.
Low pressure (LP) cylinder back pressure rotor of the present utility model exchanges the circulating water heating energy conserving system, and described heat exchangers for district heating water inlet pipe is communicated with the heat supply network return pipe, and butterfly valve C is installed on the heat supply network return pipe; On the described cooling tower water inlet pipe butterfly valve D is installed.
The beneficial effects of the utility model:
The utility model turbine low pressure cylinder internal rotor can exchange according to heating phase or non-heating period.After this project implementation, be expected to fundamentally solve the heat supply of existing high back pressure circulating water heating transformation existence and the deadly defect that non-heat supply phase unit operation economy produces a polarization, make and transform back unit heating operating mode in the winter time realization maximizing the benefits, but not heat supply phase performance driving economy is not less than former pure condensate operating mode level, thereby realizes the target of unit whole year operation optimal economic benefit.
(4) description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Accompanying drawing is a structural representation of the present utility model.
Among the figure, 1 steam turbine high-pressure cylinder, 2 butterfly valve A, 3 turbine low pressure cylinders, 4 low pressure pump-lines, 5 condensers, 6 pumps for hot water supply net, 7 butterfly valve B, 8 butterfly valve C, 9 butterfly valve D, 10 butterfly valve E, 11 water circulating pumps, 12 heat supply network return pipes, 13 heat supply network feed pipes, 14 heat exchangers for district heatings, 15 cooling towers.16 heat-net-pipelines.
(5) specific embodiment
Accompanying drawing is a kind of specific embodiment of the present utility model.This embodiment comprises steam turbine high-pressure cylinder 1, turbine low pressure cylinder 3, condenser 5, pumps for hot water supply net 6, water circulating pump 11, heat exchangers for district heating 14, cooling tower 15, steam turbine high-pressure cylinder 1, turbine low pressure cylinder 3 is connected by connecting pipe, dish valve A2 is installed on its connecting pipe, turbine low pressure cylinder is connected with heat exchangers for district heating 14 by pipeline 16 simultaneously with steam turbine high-pressure cylinder, turbine low pressure cylinder 3 is connected with condenser 5 by low pressure exhaust pipeline 4, heat exchangers for district heating 14, condenser 5, cooling tower 15 is by advancing, outlet pipe is connected, pumps for hot water supply net 6 and dish valve B7 are installed on its heat exchangers for district heating 14 water inlet pipes, water circulating pump 11 and butterfly valve E10 are housed on condenser 5 inlet channels; Heat exchangers for district heating 14 water inlet pipes are communicated with heat supply network return pipe 12, and butterfly valve C8 is installed on the heat supply network return pipe 12; On cooling tower 15 water inlet pipes butterfly valve D9 is installed.
As shown in Figure 1, the low pressure (LP) cylinder back pressure rotor exchange circulating water heating energy conserving system course of work is divided two kinds of operating modes: heating operating mode and non-heating operating mode.
When low vacuum circulating water heating operating mode is moved during heating, the low pressure rotor that turbine low pressure cylinder 3 uses sound blade progression to reduce relatively, condenser 5 operation high back pressures, needed cooling column 15 and water circulating pump 11 are out of service under the unit pure condensate operating mode, the circulation of condenser 5 is switched to the hot water pipe net circulating water loop that pumps for hot water supply net 6 is set up, form new " vapour-water " exchange system.Circulating water loop switch finish after, the discharge that enters condenser is reduced to 6000-9000t/h, back pressure of condenser rises to 30～45kPa about by 5～7kPa, the low pressure (LP) cylinder exhaust temperature rises to 69～78 ℃ (saturation temperatures of back pressure correspondence) by 30～40 ℃.Heat supply network recirculated water leaving water temperature is promoted to 66～75 ℃ (3 ℃ of condenser terminal differences) by 60 ℃, sends into heat exchangers for district heating 14 then after pumps for hot water supply net 6 boosts, and the heat supply network supply water temperature is further heated the back feed to heat supply network one time by heat supply network feed pipe 13.
The pure condensate rotor that non-heating period turbine low pressure cylinder 3 uses former design to be equipped with, the low back pressure of condenser 5 operations, when unit moves in the pure condensate operating mode, withdraw from pumps for hot water supply net 6 and heat exchangers for district heating 14 operations, recover former water circulating pump 11 and cooling tower 15 operations, back pressure of condenser returns to 5～7kPa, thereby makes unit recover former operating condition fully.
The utility model should be noted that following problem:
1, the two back pressure birotors of low pressure (LP) cylinder exchange the rotor that the circulating water heating transformation must be equipped with two different impeller progression, and the less relatively rotor of progression is used for high back pressure circulating water heating operating mode; Keep the rotor of first wife's pure condensate operating mode operation, be used for non-heating operating mode.
2, the annual more maintenance downtime of exchanging rotor of must arranging twice of unit is at every turn greatly about 8～10 days.(wherein once can carry out) in conjunction with the annual plan light maintenance.
3, change the high back pressure rotor before the heating in the winter time, after removing final stage and time L O section, answer fabrication and installation water conservancy diversion cover in low-pressure internal cylinder final stage and time L O section position, steam discharge water conservancy diversion behind the last level Four movable vane is transitted to former low pressure (LP) cylinder steam discharge deflector inlet, avoid producing eddy current and make the low-pressure internal cylinder local temperature too high.
4, because of the raising of heat supply running operating mode steam discharge back pressure and temperature, to make the swell increment and the swelling stress of parts such as cylinder, rotor (turbine low pressure cylinder the inside), low-pressure pumping steam pipeline, condenser that bigger variation takes place, therefore, should entrust steam turbine manufacturing (or transform) producer that indexs such as the mechanical strength of above-mentioned parts, the swelling stress limit, swell increment are checked calculating, and take necessary improvement and reinforcement measure according to result of calculation.Particularly whether condenser needs to be replaced by the pressure-bearing type condenser after improving back pressure, finally determines by checking result of calculation.
During 5, at 135MW-150MW machine configuration set steam feed pump, and with the shared condenser of main frame, feed pump capacity will reduce owing to the raising of back pressure during the high back pressure operation, and feed pump capacity very likely can't satisfy unit heavy-duty service needs after reducing.Should consider to increase electrically driven feed pump this moment, to satisfy unit heavy-duty service needs.
6, during steam turbine high back pressure circulating water heating improvement and design, the extraction flow design of mesolow communicating pipe should be satisfied the needs of the final heating-up temperature of heat supply network recirculated water, and recepts the caloric in condenser with heat supply network recirculated water and to be complementary.
7, after low pressure (LP) cylinder " two back pressure birotors exchange " circulating water heating was transformed, the open type water of the former use of this machine should be considered by providing as the occasion requires.Open type water, recirculated cooling water and heat supply network circulation all need to carry out corresponding transformation.
Claims (4)
1. a low pressure (LP) cylinder back pressure rotor exchanges the circulating water heating energy conserving system, comprise steam turbine high-pressure cylinder (1), turbine low pressure cylinder (3), condenser (5), pumps for hot water supply net (6), water circulating pump (11), heat exchangers for district heating (14), cooling tower (15), it is characterized in that: described steam turbine high-pressure cylinder (1), turbine low pressure cylinder (3) is connected by connecting pipe, dish valve A (2) is installed on its connecting pipe, turbine low pressure cylinder is connected with heat exchangers for district heating (14) by pipeline (16) simultaneously with steam turbine high-pressure cylinder, turbine low pressure cylinder (3) is connected with condenser (5) by low pressure exhaust pipeline (4), heat exchangers for district heating (14), condenser (5), cooling tower (15) is by advancing, outlet pipe is connected, pumps for hot water supply net (6) and dish valve B (7) are installed on its heat exchangers for district heating (14) water inlet pipe, water circulating pump (11) and butterfly valve E (10) are housed on condenser (5) inlet channel.
2. low pressure (LP) cylinder back pressure rotor according to claim 1 exchanges the circulating water heating energy conserving system, it is characterized in that: the pure condensate rotor that described turbine low pressure cylinder (3) uses former design to be equipped with at non-heating period, the low pressure rotor that uses sound blade progression to reduce relatively during the heating.
3. low pressure (LP) cylinder back pressure rotor according to claim 1 exchanges the circulating water heating energy conserving system, it is characterized in that: described heat exchangers for district heating (14) water inlet pipe is communicated with heat supply network return pipe (12), and butterfly valve C (8) is installed on the heat supply network return pipe (12).
4. low pressure (LP) cylinder back pressure rotor according to claim 1 exchanges the circulating water heating energy conserving system, it is characterized in that: on described cooling tower (15) water inlet pipe butterfly valve D (9) is installed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200170875U CN202008178U (en) | 2011-01-20 | 2011-01-20 | Low-pressure cylinder back pressure rotor interchanging circulating water heat supplying and energy saving system |
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| CN2011200170875U CN202008178U (en) | 2011-01-20 | 2011-01-20 | Low-pressure cylinder back pressure rotor interchanging circulating water heat supplying and energy saving system |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967464A (en) * | 2012-12-07 | 2013-03-13 | 山东电力集团公司电力科学研究院 | Method for evaluating performances of condensing steam turbine after high back pressure improvement |
| CN102997309A (en) * | 2012-12-26 | 2013-03-27 | 北京国电蓝天节能科技开发有限公司 | Classification heating system with high-temperature heat source heater bypass pipe |
| CN103016083A (en) * | 2012-12-26 | 2013-04-03 | 北京国电蓝天节能科技开发有限公司 | Back pressure and straight condensing switching heat supply system |
| CN103016082A (en) * | 2012-12-25 | 2013-04-03 | 华北电力大学 | 300MW-capacity-level low vacuum heat supply steam turbine system and adjusting method thereof |
| CN103063354A (en) * | 2012-12-28 | 2013-04-24 | 安徽省电力科学研究院 | Confirming method for turbine standard backpressure in thermal power generating unit energy consumption assessment and coal consumption check test |
| CN103697524A (en) * | 2013-12-24 | 2014-04-02 | 华电国际电力股份有限公司山东分公司 | Double-backpressure circulating water heating system |
| CN104235924A (en) * | 2014-10-11 | 2014-12-24 | 金陵科技学院 | Smart heat supply device with pressure regulating and releasing functions |
| CN104266172A (en) * | 2014-10-11 | 2015-01-07 | 金陵科技学院 | Smart heat supply device |
| CN104763484A (en) * | 2015-01-29 | 2015-07-08 | 河北省电力勘测设计研究院 | High backpressure heat supplying combined generating method for air-cooling steam turbine |
| CN106440019A (en) * | 2016-11-18 | 2017-02-22 | 新疆华电喀什热电有限责任公司 | High-backpressure operation optimization system for indirect air cooler unit |
| CN107191232A (en) * | 2017-06-06 | 2017-09-22 | 大唐东北电力试验研究所有限公司 | Electric heating unit heating system |
| CN107202355A (en) * | 2017-06-06 | 2017-09-26 | 大唐东北电力试验研究所有限公司 | High back pressure birotor electric heating unit heating system |
| CN108800976A (en) * | 2018-02-26 | 2018-11-13 | 西安热工研究院有限公司 | A kind of condensed water Water Level Regulating System and method being suitable for double back pressure thermal power plant units |
| CN108798810A (en) * | 2018-02-26 | 2018-11-13 | 西安热工研究院有限公司 | Double-work medium suitable for three-exhauster type Steam Turbine cools down heating system and method |
| CN110656986A (en) * | 2019-10-15 | 2020-01-07 | 中国电建集团山东电力建设第一工程有限公司 | Circulating cooling water system of steam turbine and operation method thereof |
| CN113883576A (en) * | 2021-09-02 | 2022-01-04 | 华能国际电力股份有限公司大连电厂 | Efficient and flexible heat supply and power generation system capable of realizing energy gradient recycling |
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2011
- 2011-01-20 CN CN2011200170875U patent/CN202008178U/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967464A (en) * | 2012-12-07 | 2013-03-13 | 山东电力集团公司电力科学研究院 | Method for evaluating performances of condensing steam turbine after high back pressure improvement |
| CN102967464B (en) * | 2012-12-07 | 2015-08-05 | 山东电力集团公司电力科学研究院 | The improved method of evaluating performance of condensing turbine high back pressure |
| CN103016082A (en) * | 2012-12-25 | 2013-04-03 | 华北电力大学 | 300MW-capacity-level low vacuum heat supply steam turbine system and adjusting method thereof |
| CN102997309A (en) * | 2012-12-26 | 2013-03-27 | 北京国电蓝天节能科技开发有限公司 | Classification heating system with high-temperature heat source heater bypass pipe |
| CN103016083A (en) * | 2012-12-26 | 2013-04-03 | 北京国电蓝天节能科技开发有限公司 | Back pressure and straight condensing switching heat supply system |
| CN103016083B (en) * | 2012-12-26 | 2015-11-18 | 北京国电蓝天节能科技开发有限公司 | Back pressure pure condensate switches heating system |
| CN103063354B (en) * | 2012-12-28 | 2015-01-28 | 安徽省电力科学研究院 | Confirming method for turbine standard backpressure in thermal power generating unit energy consumption assessment and coal consumption check test |
| CN103063354A (en) * | 2012-12-28 | 2013-04-24 | 安徽省电力科学研究院 | Confirming method for turbine standard backpressure in thermal power generating unit energy consumption assessment and coal consumption check test |
| CN103697524A (en) * | 2013-12-24 | 2014-04-02 | 华电国际电力股份有限公司山东分公司 | Double-backpressure circulating water heating system |
| CN103697524B (en) * | 2013-12-24 | 2015-12-09 | 华电国际电力股份有限公司山东分公司 | Two back pressure circulating water heating system |
| CN104266172A (en) * | 2014-10-11 | 2015-01-07 | 金陵科技学院 | Smart heat supply device |
| CN104235924A (en) * | 2014-10-11 | 2014-12-24 | 金陵科技学院 | Smart heat supply device with pressure regulating and releasing functions |
| CN104235924B (en) * | 2014-10-11 | 2017-02-15 | 金陵科技学院 | Smart heat supply device with pressure regulating and releasing functions |
| CN104763484A (en) * | 2015-01-29 | 2015-07-08 | 河北省电力勘测设计研究院 | High backpressure heat supplying combined generating method for air-cooling steam turbine |
| CN106440019A (en) * | 2016-11-18 | 2017-02-22 | 新疆华电喀什热电有限责任公司 | High-backpressure operation optimization system for indirect air cooler unit |
| CN107191232A (en) * | 2017-06-06 | 2017-09-22 | 大唐东北电力试验研究所有限公司 | Electric heating unit heating system |
| CN107202355A (en) * | 2017-06-06 | 2017-09-26 | 大唐东北电力试验研究所有限公司 | High back pressure birotor electric heating unit heating system |
| CN108800976A (en) * | 2018-02-26 | 2018-11-13 | 西安热工研究院有限公司 | A kind of condensed water Water Level Regulating System and method being suitable for double back pressure thermal power plant units |
| CN108798810A (en) * | 2018-02-26 | 2018-11-13 | 西安热工研究院有限公司 | Double-work medium suitable for three-exhauster type Steam Turbine cools down heating system and method |
| CN108800976B (en) * | 2018-02-26 | 2023-08-22 | 西安热工研究院有限公司 | Condensate water level adjusting system and method suitable for double back pressure heat supply unit |
| CN110656986A (en) * | 2019-10-15 | 2020-01-07 | 中国电建集团山东电力建设第一工程有限公司 | Circulating cooling water system of steam turbine and operation method thereof |
| CN110656986B (en) * | 2019-10-15 | 2024-01-19 | 中国电建集团山东电力建设第一工程有限公司 | Circulating cooling water system of steam turbine and operation method thereof |
| CN113883576A (en) * | 2021-09-02 | 2022-01-04 | 华能国际电力股份有限公司大连电厂 | Efficient and flexible heat supply and power generation system capable of realizing energy gradient recycling |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
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Owner name: SHANDONG HONG'AO ELECTRIC SCIENCE AND TECHNOLOGY C Effective date: 20111229 Owner name: SHILIQUAN POWER GENERATION PLANT OF HUADIAN POWER Free format text: FORMER OWNER: SHANDONG HONG'AO ELECTRIC SCIENCE AND TECHNOLOGY CO., LTD. Effective date: 20111229 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Duan Junzhai Inventor after: Song Tao Inventor after: Cheng Diewei Inventor after: He Hongbin Inventor after: Han Kuizheng Inventor after: Sun Guoqiang Inventor after: Han Rongli Inventor after: Wei Cunhai Inventor after: Liu Jinting Inventor before: Duan Junzhai Inventor before: Song Tao Inventor before: Cheng Diewei Inventor before: He Hongbin Inventor before: Wei Cunhai Inventor before: Liu Jinting |
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| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 250101 JINAN, SHANDONG PROVINCE TO: 277100 ZAOZHUANG, SHANDONG PROVINCE Free format text: CORRECT: INVENTOR; FROM: DUAN JUNZHAI SONG TAO CHENG XIEWEI HE HONGBIN WEI CUNHAI LIU JINTING TO: DUAN JUNZHAI SONG TAO CHENG XIEWEI HE HONGBIN HAN KUIZHENG SUN GUOQIANG HAN RONGLI WEI CUNHAI LIU JINTING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20111229 Address after: 277100 No. 143 Jiefang South Road, Shandong, Zaozhuang Co-patentee after: Shandong Hongao Electric Power Technology Co., Ltd. Patentee after: Huadian Power International Corporation Limited Shiliquan Plant Address before: 250101 Shandong Province, Ji'nan City Licheng District High-tech Development Zone, Road 359 No. three Hing century wealth center block B2 room 603 Patentee before: Shandong Hongao Electric Power Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111012 Termination date: 20200120 |
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| CF01 | Termination of patent right due to non-payment of annual fee |