CN104566331A - Back-pressure type heat regenerative system for combined heat and power generation - Google Patents

Back-pressure type heat regenerative system for combined heat and power generation Download PDF

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Publication number
CN104566331A
CN104566331A CN201410812850.1A CN201410812850A CN104566331A CN 104566331 A CN104566331 A CN 104566331A CN 201410812850 A CN201410812850 A CN 201410812850A CN 104566331 A CN104566331 A CN 104566331A
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pressure
steam
heater
turbine
feed pump
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CN201410812850.1A
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CN104566331B (en
Inventor
林俊光
张卫灵
光旭
沈又幸
李琪
袁勤勇
徐红波
黄琪薇
吴猛
卢婉珍
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Energy source in China construction group Zhejiang Province Power Design Institute Co., Ltd
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Zhejiang Electric Power Design Institute
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Abstract

The invention relates to a back-pressure type heat regenerative system for combined heat and power generation. The back-pressure type heat regenerative system mainly comprises a back-pressure type generator set, a No.1 high pressure heater, a No.2 high pressure heater, a high pressure deaerator, a steam feed pump, a feed pump turbine and a surface type water supplemental heater, wherein most steam exhausted from a back-pressure type steam turbine is used as low pressure heat supply steam for supplying heat outwards through a main steam exhaust pipeline, part of steam exhausted from the back-pressure steam turbine acts as deaeration steam of the high pressure deaerator, and part of steam exhausted from the back-pressure type steam turbine acts as driving steam for the feed pump turbine, that is to say, a pipeline is guided from the main steam exhaust pipeline and is connected with the feed pump turbine through a fourth valve; steam exhausted from the feed pump turbine enters the surface type water supplemental heater, and is used for heating chemical supplemental water discharged from a sealing heater; the surface type water supplemental heater is connected with the high pressure deaerator, and after being deaerated, the chemical supplemental water is connected with the No.2 high pressure heater for further heating fed water, through a water supply pump driven by the steam exhausted from the back-pressure type steam turbine, and then enters a boiler through connecting with the No.1 high pressure heater.

Description

A kind of cogeneration of heat and power back pressure type heat regenerative system
Technical field
The invention belongs to energy field, particularly relate to a kind of back pressure type heat regenerative system for new and effective cogeneration of heat and power.
Background technology
In order to respond the call that national energy-saving reduces discharging, most area all takes central heating mode to industrial park inside and outside the province at present.Back pressure unit, due to features such as its thermal efficiency are high, heating load is large, becomes the first-selection of thermic load Nesting Zone.
For small-sized back pressure unit, the deoxygenation of general employing two-stage, its deaerating effect is relatively good, it is comparatively reasonable on steam energy level gradient utilizes, but when variable load operation, atmospheric type deaerator mates with feed pump turbine steam discharge is more difficult, and two-stage deoxygenation is relatively poor to the adaptability of operating mode, and compared with single-stage deoxygenation, main building and body equipment investment increase.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, and provide a kind of rational in infrastructure, easy to use and reliable, variable parameter operation good stability, reduces investment outlay, and reduces operating cost, the back pressure type heat regenerative system of the cogeneration of heat and power of economize energy.
The object of the invention is to be achieved through the following technical solutions: a kind of cogeneration of heat and power back pressure type heat regenerative system, it mainly comprises: back pressure type generating set, a high-pressure heater, No. two high-pressure heaters, higher-pressure deaerator, steam feed pump, feed pump turbine, surface-type moisturizing heaters, described back pressure steam turbine steam discharge major part as low pressure heating steam by the external heat supply of main blow-off line; A part, as the deoxygenation steam of higher-pressure deaerator, is namely drawn a road pipeline and is connected with higher-pressure deaerator by the 3rd valve on main blow-off line; Some is as the driving steam of feed pump turbine, on main blow-off line, namely draws a road pipeline be connected with feed pump turbine by the 4th valve;
Described feed pump turbine steam discharge enters surface-type moisturizing heater, goes heating gland heater chemical feed water out; After surface-type moisturizing heater connects higher-pressure deaerator 8 deoxygenation, the feed pump driven by back of the body formula vapor wheel press steam discharge connects No. two further heated feed waters of high-pressure heater, then enters boiler through connection high-pressure heater.
First described chemical feed water heats through gland heater; Described surface-type moisturizing heater condensate is returned on the chemical feed water main pipeline between surface-type moisturizing heater and higher-pressure deaerator by drainage pump; The hydrophobic of a high-pressure heater flows automatically to No. two high-pressure heaters, enters into higher-pressure deaerator after mixing with No. two high-pressure heaters hydrophobic; The hydrophobic of gland heater is returned on the chemical feed water main pipeline before gland heater by drainage pump.
Described back pressure steam turbine (1) mainly contains three tunnels and draws gas: the first via is connected with a high-pressure heater by the first valve, and the second tunnel is connected with No. two high-pressure heaters by the second valve, and the 3rd tunnel is as the external heat supply of middle pressure heating steam.
The present invention is by adopting two-stage high-pressure heater and single-stage high voltage oxygen-eliminating device, and utilize back pressure machine part steam discharge to drive steam feed pump, feed pump turbine steam discharge enters surface-type moisturizing heater and adds thermalization moisturizing, thus forms new and effective back pressure machine heat regenerative system.
The invention has the beneficial effects as follows, compared with joining steam feed pump system with two-stage deoxygenation, native system variable parameter operation good stability, main building and body equipment investment are saved more.Compared with moving feed-water pump with single-stage deoxygenation distribution, it is more reasonable that native system steam energy level gradient utilizes, for the back pressure unit of 50MW, native system supplying power for outside amount at least increases 3000kw, by the gross earnings often spending electricity 0.32 yuan, annual increase gross earnings about 5,280,000 yuan (per year hours of operation 5500 hours meters).
The present invention has rational in infrastructure, easy to use and reliable, and variable parameter operation good stability, reduces investment outlay, and reduces operating cost, the features such as economize energy.
Accompanying drawing explanation
fig. 1 is the operation logic schematic diagram of cogeneration of heat and power back pressure type heat regenerative system of the present invention.
Label in figure is: back pressure steam turbine 1, generator 2, boiler 3, feed pump turbine 4, steam feed pump 5, high-pressure heater 6, No. two high-pressure heaters 7, higher-pressure deaerator 8, surface-type moisturizing heater 9, gland heater 10, drainage pump 11, axle pressure heater and drainage pump 12 and the first valve 101 are to the 4th valve 104.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.Shown in Fig. 1, a kind of cogeneration of heat and power back pressure type heat regenerative system of the present invention, it mainly comprises: back pressure type generating set 1, high-pressure heater 6, No. two high-pressure heaters 7, higher-pressure deaerator 8, steam feed pump 5, feed pump turbine 4, surface-type moisturizing heater 9.Described back pressure steam turbine 1 steam discharge major part as low pressure heating steam by the external heat supply of main blow-off line; A part, as the deoxygenation steam of higher-pressure deaerator, is namely drawn a road pipeline and is connected with higher-pressure deaerator 8 by the 3rd valve 103 on main blow-off line; Some is as the driving steam of feed pump turbine, on main blow-off line, namely draws a road pipeline be connected with feed pump turbine 4 by the 4th valve 104;
Described feed pump turbine 4 steam discharge enters surface-type moisturizing heater 9, goes heating gland heater 10 chemical feed water out; After surface-type moisturizing heater 9 connects higher-pressure deaerator 8 deoxygenation, the feed pump 5 driven by back of the body formula vapor wheel press 1 steam discharge connects No. two high-pressure heaters 7 heated feed water further, then enters boiler through connection high-pressure heater 6.
Shown in figure, first described chemical feed water heats through gland heater 10; Described surface-type moisturizing heater 9 is hydrophobic to be returned on the chemical feed water main pipeline between surface-type moisturizing heater 9 and higher-pressure deaerator 8 by drainage pump 11; The hydrophobic of a high-pressure heater 6 flows automatically to No. two high-pressure heaters 7, enters into higher-pressure deaerator 8 after mixing with No. two high-pressure heaters 7 hydrophobic; The hydrophobic of gland heater 10 is returned on the chemical feed water main pipeline before gland heater 10 by drainage pump 12.
Back pressure steam turbine 1 of the present invention mainly contains three tunnels and draws gas: the first via is connected with a high-pressure heater 6 by the first valve 101, second tunnel is connected with No. two high-pressure heaters 7 by the second valve 102, and the 3rd tunnel is as the external heat supply of middle pressure heating steam.
Embodiment: shown in Fig. 1, the present invention mainly comprises the equipment such as boiler 3, back pressure steam turbine 1, generator 2, high-pressure heater 6, No. two high-pressure heaters 7, higher-pressure deaerator 8, steam feed pump 5, feed pump turbine 4, surface-type moisturizing heater 9, gland heater 10, drainage pump 11, axle pressure heater and drainage pump 12 and related valve 101 ~ 104.
This system water supplement is come by chemical feed water, moisturizing is first after gland heater 10 heats, enter the surface-type moisturizing heater 9 that feed pump turbine 4 steam discharge heats, after higher-pressure deaerator 8 deoxygenation, No. two high-pressure heaters 7 heated feed water further got to by the feed pump 5 driven by back pressure machine 1 steam discharge, enters boiler through a high-pressure heater 6.
The hydrophobic of a high-pressure heater 6 flows automatically to No. two high-pressure heaters 7, enters into higher-pressure deaerator 8 after mixing with No. two high-pressure heaters 7 hydrophobic.Surface-type moisturizing heater 8 is hydrophobic to be returned on the chemical feed water main pipeline between surface-type moisturizing heater 9 and higher-pressure deaerator 8 by drainage pump 11.The hydrophobic of gland heater 10 is returned on the chemical feed water main pipeline before gland heater 10 by drainage pump 12.
The main steam produced from boiler enters back pressure turbine generating set 1 ~ 2 acting generating, described back pressure steam turbine 1 mainly contains three tunnels and draws gas: the first via is connected with a high-pressure heater 6 by the first valve 101, second tunnel is connected with No. two high-pressure heaters 7 by the second valve 102, and the 3rd tunnel is as the external heat supply of middle pressure heating steam.
Back pressure steam turbine steam discharge major part steam discharge as low pressure heating steam by the external heat supply of main blow-off line; A part, as the deoxygenation steam of higher-pressure deaerator 8, is namely drawn a road pipeline and is connected with higher-pressure deaerator by the 3rd valve 103 on main blow-off line; Some is as the driving steam of feed pump turbine 4, on main blow-off line, namely draws a road pipeline be connected with feed pump turbine by valve.Feed pump turbine steam discharge enters surface-type moisturizing heater 9, goes heating gland heater 10 chemical feed water out.
The course of work of the present invention is as follows:
Mainly be divided into three parts.Part I, the heating of feedwater.The moisturizing of this system is come by chemical feed water, moisturizing is first after gland heater heating, the surface-type moisturizing heater entering feed pump turbine steam discharge to heat, after higher-pressure deaerator deoxygenation, No. two further heated feed waters of high-pressure heater got to by the feed pump driven by back pressure machine steam discharge, enter boiler through a high-pressure heater.
Part II, back pressure turbine draws gas.Extract three road steam out from back pressure steam turbine cylinder body, wherein one take out the steam taken out with two and heat one-level high-pressure heater and secondary high-pressure heater respectively, also have a road as the external heat supply of middle pressure heating steam.
Part III, back pressure steam turbine steam discharge.It mainly contains three kinds of purposes: most of steam discharge as low pressure heating steam by the external heat supply of main blow-off line; A part is as the deoxygenation steam of higher-pressure deaerator; Some is as the driving steam of feed pump turbine.Feed pump turbine steam discharge enters surface-type moisturizing heater, goes heating gland heater chemical feed water out.

Claims (3)

1. a cogeneration of heat and power back pressure type heat regenerative system, it mainly comprises: back pressure type generating set, a high-pressure heater, No. two high-pressure heaters, higher-pressure deaerator, steam feed pump, feed pump turbine, surface-type moisturizing heaters, is characterized in that described back pressure steam turbine (1) steam discharge major part as low pressure heating steam by the external heat supply of main blow-off line; A part, as the deoxygenation steam of higher-pressure deaerator, is namely drawn a road pipeline and is connected with higher-pressure deaerator (8) by the 3rd valve (103) on main blow-off line; Some is as the driving steam of feed pump turbine, on main blow-off line, namely draws a road pipeline be connected with feed pump turbine (4) by the 4th valve (104);
Described feed pump turbine (4) steam discharge enters surface-type moisturizing heater (9), goes to heat gland heater (10) chemical feed water out; After surface-type moisturizing heater (9) connects higher-pressure deaerator (8) deoxygenation, the feed pump (5) driven by back of the body formula vapor wheel press (1) steam discharge connects No. two high-pressure heaters (7) heated feed water further, then passes through connection high-pressure heater (6) and enter boiler.
2. cogeneration of heat and power back pressure type heat regenerative system according to claim 1, is characterized in that first described chemical feed water heats through gland heater 10; Described surface-type moisturizing heater (9) is hydrophobic returns on the chemical feed water main pipeline between surface-type moisturizing heater (9) and higher-pressure deaerator (8) by drainage pump (11); The hydrophobic of a high-pressure heater (6) flows automatically to No. two high-pressure heaters (7), enters into higher-pressure deaerator (8) after mixing with No. two high-pressure heaters (7) hydrophobic; The hydrophobic of gland heater (10) is returned on the front chemical feed water main pipeline of gland heater (10) by drainage pump (12).
3. cogeneration of heat and power back pressure type heat regenerative system according to claim 1, it is characterized in that described back pressure steam turbine (1) mainly contains three tunnels and draws gas: the first via is connected with a high-pressure heater (6) by the first valve (101), second tunnel is connected with No. two high-pressure heaters (7) by the second valve (102), and the 3rd tunnel is as the external heat supply of middle pressure heating steam.
CN201410812850.1A 2014-12-24 2014-12-24 A kind of cogeneration of heat and power back pressure type heat regenerative system Active CN104566331B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105910092A (en) * 2015-11-26 2016-08-31 中国能源建设集团浙江省电力设计院有限公司 Back pressure turbine vacuum deaerator system and condensation water circulation method
CN106195995A (en) * 2016-08-04 2016-12-07 联合瑞升(北京)科技有限公司 A kind of heating power jet pump height adds steam-supplying system
CN106402840A (en) * 2016-09-14 2017-02-15 上海明华电力技术工程有限公司 Method for cutting out high-pressure heater steam side valve for participating in unit primary frequency modulation and load adding
CN107060919A (en) * 2017-05-31 2017-08-18 邯钢集团邯宝钢铁有限公司 A kind of gas fired-boiler steam turbine power generation Quick starting energy-saving device and method
CN108613237A (en) * 2018-04-28 2018-10-02 东南大学 A kind of thermal power cogeneration central heating system based on temperature counterpart cascade utilization
CN110566298A (en) * 2019-09-30 2019-12-13 大唐郓城发电有限公司 Method for optimizing regenerative cycle efficiency
CN111120013A (en) * 2019-12-13 2020-05-08 山东中实易通集团有限公司 Reliable steam supply system under unavailable working condition of steam turbine generator unit

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CN102720550A (en) * 2012-07-02 2012-10-10 上海汽轮机厂有限公司 Dual-machine regenerative steam extraction steam thermodynamic system
CN102828791A (en) * 2012-09-06 2012-12-19 中国电力工程顾问集团华东电力设计院 Thermal power plant and united thermodynamic system for thermal power plant
CN103498708A (en) * 2013-10-10 2014-01-08 中国电力工程顾问集团华东电力设计院 Air-cooling reheating unit system arranged in small back-pressure type steam turbine and used for driving feed pump

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US7607304B2 (en) * 2003-02-07 2009-10-27 Elsam Engineering A/S Steam turbine system
CN201715492U (en) * 2010-05-28 2011-01-19 济南市琦泉热电有限责任公司 Set back-heating system adopting different pressure ratings of steam
CN102392700A (en) * 2011-08-23 2012-03-28 福建省石狮热电有限责任公司 Novel backpressure turbine with low vacuum regenerative heat
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105910092A (en) * 2015-11-26 2016-08-31 中国能源建设集团浙江省电力设计院有限公司 Back pressure turbine vacuum deaerator system and condensation water circulation method
CN105910092B (en) * 2015-11-26 2018-06-12 中国能源建设集团浙江省电力设计院有限公司 A kind of back pressure unit vacuum dust cather system and condensation water round-robin method
CN106195995A (en) * 2016-08-04 2016-12-07 联合瑞升(北京)科技有限公司 A kind of heating power jet pump height adds steam-supplying system
CN106402840A (en) * 2016-09-14 2017-02-15 上海明华电力技术工程有限公司 Method for cutting out high-pressure heater steam side valve for participating in unit primary frequency modulation and load adding
CN106402840B (en) * 2016-09-14 2019-04-26 上海明华电力技术工程有限公司 Cut off the method that high-pressure heater vapour side valve door participates in unit primary frequency modulation application of load
CN107060919A (en) * 2017-05-31 2017-08-18 邯钢集团邯宝钢铁有限公司 A kind of gas fired-boiler steam turbine power generation Quick starting energy-saving device and method
CN107060919B (en) * 2017-05-31 2019-05-03 邯钢集团邯宝钢铁有限公司 A kind of gas fired-boiler steam turbine power generation Quick starting energy-saving device and method
CN108613237A (en) * 2018-04-28 2018-10-02 东南大学 A kind of thermal power cogeneration central heating system based on temperature counterpart cascade utilization
CN110566298A (en) * 2019-09-30 2019-12-13 大唐郓城发电有限公司 Method for optimizing regenerative cycle efficiency
CN111120013A (en) * 2019-12-13 2020-05-08 山东中实易通集团有限公司 Reliable steam supply system under unavailable working condition of steam turbine generator unit

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Address after: No. 68 GUCUI Road, Hangzhou, Zhejiang Province

Patentee after: Energy source in China construction group Zhejiang Province Power Design Institute Co., Ltd

Address before: No. 68 GUCUI Road, Hangzhou, Zhejiang Province

Patentee before: Zhejiang Electric Power Design Institute