CN206310568U - Feed pump turbine low-vacuum-operating circulating water heating system - Google Patents

Feed pump turbine low-vacuum-operating circulating water heating system Download PDF

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Publication number
CN206310568U
CN206310568U CN201620991879.5U CN201620991879U CN206310568U CN 206310568 U CN206310568 U CN 206310568U CN 201620991879 U CN201620991879 U CN 201620991879U CN 206310568 U CN206310568 U CN 206310568U
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feed pump
water
pump turbine
heating
vacuum
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CN201620991879.5U
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仲伟龙
吴家凯
马雪松
李伟科
范永春
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China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
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China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
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Abstract

The utility model is related to feed pump turbine low-vacuum-operating circulating water heating system and its power-economizing method, include feed pump turbine group, cooling tower and space-heating installation, feed pump turbine group includes several feed pump turbine structures, the recirculated water water side of feed pump turbine structure connects the input of switching valve, one of output end of switching valve passes sequentially through circulation pump of heat-supply network structure, heat exchangers for district heating structure connects the recirculated water water inlet end of space-heating installation, the recirculated water water inlet end that the recirculated water backwater end of space-heating installation passes through one of switch valve connection feed pump turbine structure, form heating circular water-loop;The recirculated water water inlet end of two company's cooling towers of the output end of switching valve, the recirculated water backwater end of cooling tower forms non-heating circular water-loop by the two of the switch valve recirculated water water inlet end for connecting feed pump turbine structures;Each feed pump turbine structure is connected and composed by feed pump turbine and condenser.The utility model can improve the reaction rate of feed pump turbine efficiency and varying load condition regulation, realize that high efficiency of energy is comprehensively utilized.

Description

Feed pump turbine low-vacuum-operating circulating water heating system
Technical field
The utility model is related to a kind of heating system, and in particular to a kind of feed pump turbine low-vacuum-operating circulating water is adopted The heat energy that warm heating system power plant feed pump turbine is produced carries out conversion, to meet urban heat supplying demand.Belong to power plant Recirculated water heating equipment technical field.
Background technology
Main steam turbine Heat Supplying with Low Vacuum is a kind of steam turbine operation pattern of eighties of last century rise at the end of the sixties, is mainly used in Small-sized fired power generating unit steam turbine (small unit such as such as 12MW, 24MW) the heating transformation project in the north.The original of the technology Reason is, using turbine steam condenser cooling Water Sproading this partial heat energy, and these cooling waters to be supplied directly to heat user, After heat user is finished and sends turbine condenser back to and do and used as cooling water again, that is, form a cyclic process.
Because heat supply network return water temperature is generally 60-70 degree, higher than the coolant-temperature gage that cooling tower return comes is more, returns to condensing Heat transfer effect is deteriorated after device, that is, the condensation efficiency reduction to turbine discharge, then results in the afterbody vacuum of steam turbine Reduce, steam turbine runs under partial vacuum.Due to this phenomenon because what heat supply caused, then there is ' Heat Supplying with Low Vacuum ' Word.
At present, main steam turbine Heat Supplying with Low Vacuum is generally used for small thermal power unit heat supply transformation.Heating period, is followed using low vacuum Ring water heat supply running, condenser is used as thermal source, and heat supply network recirculated water is heated using turbine discharge.Non- heating period, steam turbine Vacuum is run, and recirculated water is by cooling tower cooler.It has the disadvantage:(1) steam turbine is mainly used for generating electricity, and is transported in the case of low vacuum Capable steam turbine, can cause generating set to be unable to reach unit design load, so as to cause generating set to expire in Heating Season The requirement that sufficient power network generates electricity to unit by nameplate electricity;(2) steam turbine is very low in the efficiency of low-vacuum-operating, and economy is poor, It is not suitable for Large-scale fire-electricity unit;(3) steam turbine is very poor to heat supply network heating demand variation adaptability, and system reliability is low.
Utility model content
The purpose of this utility model, is to solve existing feed pump turbine low-vacuum-operating circulating water heating system The efficiency of operation is low, less economical, the adaptability not low problem of strong, system reliability, there is provided a kind of feed pump turbine is low true Dry running recirculated water heating system.With the requirement for meeting power network and possessing to unit nameplate generating capacity, it is applicable not only to Small thermal power unit heat supply is transformed and the characteristics of suitable for Large-scale fire-electricity unit.
The utility model purpose can be achieved through the following technical solutions:
Feed pump turbine low-vacuum-operating circulating water heating system, includes feed pump turbine group, cooling tower And space-heating installation, it is characterised in that:Feed pump turbine group includes several feed pump turbine structures, feed pump turbine The recirculated water water side of structure connects one of the input of switching valve, output end of switching valve and passes sequentially through circulation pump of heat-supply network knot Structure, heat exchangers for district heating structure connect the recirculated water water inlet end of space-heating installation, and the recirculated water backwater end of space-heating installation is by opening The recirculated water water inlet end of one of valve connection feed pump turbine structure is closed, heating circular water-loop is formed;The output of switching valve The recirculated water water inlet end of two company's cooling towers at end, the recirculated water backwater end of cooling tower connects feed pump steamers by the two of switch valve The recirculated water water inlet end of machine structure, forms non-heating circular water-loop;Each feed pump turbine structure is by feed pump turbine Connected and composed with condenser, condenser is specifically set on feed pump turbine, formation is transported by feed pump turbine low vacuum Row, condenser are the heating heat supply network circulating water structure of thermal source heat exchanger, or form the operation of feed pump turbine high vacuum, condensing Device is the cooling circulating water structure of cooling heat exchanger.
The utility model purpose can also be achieved through the following technical solutions:
Further, the heat exchangers for district heating structure is composed in parallel by several heat exchangers for district heatings.
Further, the circulation pump of heat-supply network structure is connected by several water pumps, and several are composed in parallel.
Further, it is provided with regulating valve in the junction of heat exchangers for district heating structure and circulation pump of heat-supply network structure.
Further, it is provided with electronic with the input junction of one of switch valve in the recirculated water backwater end of space-heating installation Water filter.
Further, the input of the three connection circulation pump of heat-supply network structures that the output end of electric water filter passes through switch valve End.
It is significant progress that the utility model has substantive distinguishing features following prominent:
1st, the feed pump turbine low-vacuum-operating circulating water heating system that the utility model is related to, due to its feedwater One of the input of the recirculated water water side connection switching valve of pump steam turbine structure, output end of switching valve pass sequentially through heat supply network and follow Ring water pump structure, heat exchangers for district heating structure connect the recirculated water water inlet end of space-heating installation, the recirculated water backwater of space-heating installation End forms heating circular water-loop by the recirculated water water inlet end of one of switch valve connection feed pump turbine structure;Conversion The recirculated water water inlet end of two company's cooling towers of the output end of valve, the recirculated water backwater end of cooling tower by the two of switch valve connect to The recirculated water water inlet end of water pump steam turbine structure, forms non-heating circular water-loop;Each feed pump turbine structure is by feeding water Mercury vapour turbine and condenser are connected and composed, and condenser is specifically set on feed pump turbine, are formed by feed pump turbine Low-vacuum-operating, condenser are the heating heat supply network circulating water structure of thermal source heat exchanger, or form feed pump turbine high vacuum Operation, condenser is the cooling circulating water structure of cooling heat exchanger;Therefore, it is possible to solve existing feed pump turbine low vacuum fortune The operation of row recirculated water heating system efficiency is low, less economical, the adaptability not low problem of strong, system reliability, have Efficiency high, good economy performance, strong adaptability, system reliability effect high, disclosure satisfy that power network possesses nameplate generating energy to unit The requirement of power, is applicable not only to small thermal power unit heat supply transformation and the characteristics of suitable for Large-scale fire-electricity unit.
2nd, the feed pump turbine low-vacuum-operating circulating water heating system that the utility model is related to by respectively to Condenser is set on water pump steam turbine, and each group feed pump steam turbine wheel low-vacuum-operating, steam thermal energy is processed by respective condenser By heat supply network periodical feeding pipeline to heating user, described heat exchangers for district heating group is set on circulating heating heat supply pipeline; In low-vacuum-operating to improve exhaust temperature, heat supply network periodical feeding pipeline recirculated water is heated using condenser, realize external heating Heat supply and the target of energy saving.Feed pump turbine operating load and exhaust temperature change can be eliminated simultaneously to main steam turbine Low pressure (LP) cylinder efficiency and condenser heat exchange efficiency have undesirable effect, and improve main steam turbine low pressure (LP) cylinder efficiency and power plant comprehensively effect Rate.Therefore, the utility model can both improve the reaction rate of feed pump turbine efficiency and varying load condition regulation, again can be The cold end loss of feed pump turbine can be reduced during Heating Season, while heating steam consumption and fuel consumption can also be saved, Realize that high efficiency of energy is comprehensively utilized.
3rd, the utility model passes through and is provided with switching valve in non-heating circulation water loops and circulating heating heat supply loop Door is switched over.Heating period and non-heating period is switched over by switch valve and is used, thus, the utility model can be strengthened and adopted The adaptability and system reliability of warm load variations, and effectively improve main steam turbine generating efficiency and reduce boiler oil consumption, Reduce power plant's totality auxiliary power consumption level and improve unit heat economy.
Brief description of the drawings
Fig. 1 is one theory diagram of specific embodiment of the utility model.
Specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Specific embodiment 1:
Feed pump turbine low-vacuum-operating circulating water heating system shown in reference picture 1, includes feedwater mercury vapour Wheel unit, cooling tower 2 and space-heating installation, feed pump turbine group include several feed pump turbine structures, and feed water mercury vapour The recirculated water water side of turbine structure connects one of the input of switching valve 9, output end of switching valve 9 and passes sequentially through heat supply network circulation Water pump structure 10, heat exchangers for district heating structure 7 connect the recirculated water water inlet end of space-heating installation 6, and the recirculated water of space-heating installation 6 is returned Water end (W.E.) forms heating circular water-loop 4 by the recirculated water water inlet end of one of switch valve connection feed pump turbine structure;Turn The recirculated water water inlet end of two company's cooling towers 2 of the output end of valve 9 is changed, the recirculated water backwater end of cooling tower 2 passes through the two of switch valve The recirculated water water inlet end of feed pump turbine structure is connected, non-heating circular water-loop 3 is formed;Each feed pump turbine structure Connected and composed by feed pump turbine 1 and condenser 5, condenser 5 is set specifically on feed pump turbine 1, formed by giving The low-vacuum-operating of water pump steam turbine 1, condenser 5 are the heating heat supply network circulating water structure of thermal source heat exchanger, or form feed pump The high vacuum of steam turbine 1 is run, and condenser 5 is the cooling circulating water structure of cooling heat exchanger.
In real specific implementation, the heat exchangers for district heating structure 7 is composed in parallel by several heat exchangers for district heatings.The heat supply network is followed Ring water pump structure 10 is connected by several water pumps, and several are composed in parallel.In heat exchangers for district heating structure 7 and circulation pump of heat-supply network knot The junction of structure 10 is provided with regulating valve 7-1, and heating amount is adjusted using regulating valve 7-1.
Further, it is contemplated that cycling use of water long-term use certainly will produce impurity and influence water quality, so influence heat supply effect Really, the recirculated water backwater end in space-heating installation 6 is provided with electric water filter 8 with the input junction of one of switch valve, the electricity The input of the three connection circulation pump of heat-supply network structures 10 that the output end of dynamic water filter 8 passes through switch valve.By electric water filter Carry out the impurity of filtration cycle water.
The power-economizing method of above-mentioned feed pump turbine low-vacuum-operating circulating water heating system:
1) main steam turbine with power plant is as generating set, feed pump turbine 1 described in claim 1 and is attached thereto The subsidiary engine equipment of equipment power plant, by described feed pump turbine 1 in low-vacuum-operating to improve exhaust temperature, using condensing Device 5 heats heat supply network recirculated water, to realize external heating and energy saving;
2) main steam turbine operation is not influenceed by Heating Season and non-heating season;Heating Season, the low vacuum of feed pump turbine 1 fortune OK, condenser 5 is used as thermal source heat exchanger, and heat supply network recirculated water is heated using turbine discharge;Non-heating season, feed pump steamer The high vacuum of machine 1 is run, and condenser 5 uses as cooling heat exchanger, and used heat is taken away using circulating cooling water of power plant system, finally by Power plant cooling tower discharges used heat in environment;Two kinds of operating conditions switch to realize by valve 9.
Specifically power-economizing method is:
In Heating Season, to heating reliability and heat supply network varying duty strong adaptability, do not born by feed pump turbine operation Lotus influence change;To heating varying load condition, water temperature and Flow-rate adjustment bypass are provided with, the change of heating user and load can be met Change.
When the conversion steam thermal energy of condenser 5 can not meet heating user's request, using on heat supply network periodical feeding pipeline 4 Heat exchangers for district heating 7 is set and is adjusted heat energy.I.e. described heating period and non-heating period are by non-heating circular water-loop 3 The switch valve 9 being provided with heating circular water-loop 4 is switched over, and heating can not be met in the conversion steam thermal energy of condenser 5 During user's request, heat energy is adjusted using the heat exchangers for district heating 7 set on heat supply network periodical feeding pipeline 4.
Condenser 5, i.e. each group feed pump turbine 1 are respectively arranged with group feed pump turbine 1 and are separately configured solidifying Vapour device 5, makes each group feed pump turbine 1 carry out energy conversion each via the condenser 5 being separately configured, and is transported by low vacuum Row heats the recirculated water of heat supply network periodical feeding pipeline using condenser 5 to improve exhaust temperature, and abbreviation heat supply network recirculated water is realized The target of external heating and energy saving.
When feed pump turbine low-vacuum-operating circulating water heating system runs, heating is not received in main steam turbine operation Season and non-heating season are influenceed, and the condenser on main steam turbine is not influenceed by the steam discharge of each group feed pump turbine 1 and improves heat exchange Efficiency.Heating Season, feed pump turbine low-vacuum-operating, condenser 5 is used as thermal source heat exchanger, using turbine discharge plus Heat supply network recirculated water.Non-heating season, the normal high vacuum operation of feed pump turbine, condenser 5 is used as cooling heat exchanger, profit Used heat is taken away with power plant's recirculating cooling water system, used heat is finally discharged in environment by power plant cooling tower 2.The Heating Season and non- Two kinds of operating conditions of Heating Season cut 9 and bring realization by valve.
During the utility model application, with good heating reliability and varying duty adaptability, in Heating Season, to adopting Warm reliability of heat-supply system and heat supply network varying duty strong adaptability, are not influenceed change by feed pump turbine operating load.Negative is become to heating Lotus operating mode, is provided with water temperature and Flow-rate adjustment bypass, can meet the change of heating user and load.
The economic well-being of workers and staff of the feed pump turbine low-vacuum-operating circulating water heating system and its application process:
1) feed pump turbine waste heat from exhaust can be reclaimed in Heating Season, reduces cold end loss.
2) heating steam consumption can be saved in Heating Season, improves main steam turbine generating efficiency and reduce boiler oil consumption.
3) circulating cooling water of power plant pump auxiliary power consumption can be reduced in Heating Season, reduces power plant's totality auxiliary power consumption level and carry Unit heat economy high.
4) strong adaptability is changed to heating load and system reliability is high.
The explanation of technical terms that the utility model is related to is as follows:
1) main frame steam turbine:Power plant is used for the steam turbine for generating electricity
2) steam feed pump:The feed pump driven using small steam turbine
3) feed pump turbine:Drive subsidiary engine equipment small steam turbine
4) turbine discharge:After superheated steam with calorific potential energy introduces steam turbine through pipeline, just calorific potential can be transformed into Kinetic energy.Swiftly flowing Steam Actuation turbine rotor is rotated, and forms mechanical energy.Discharge calorific potential can steam under steam turbine The steam drain discharge in portion.
5) cold end loss:The heat that turbine discharge contains is taken away by the cooling water of condenser, and the part of heat energy belongs to electricity Factory's used heat.
6) condenser:Turbine discharge is condensed into a kind of water-cooled surfaces formula heat exchanger of water, cooling water is (also known as circulation Water) discharged into cooling tube bundle and from outlet hydroecium from import hydroecium.To ensure to maintain height during steam condensation in condenser Vacuum and good heat-transfer effect, are also equipped with air-extractor, and it will constantly leak into air and other non-condensing gas in condenser Body is extracted out.Air-extractor mainly has water jet air ejector, stream-jet ejector, oil-sealed rotary pump etc..
7) main frame steam turbine:Power plant is used for the steam turbine for generating electricity
8) low-vacuum-operating:Steam turbine runs under running vacuum levels apparently higher than normal power generation power generator turbine
9) Heating Season:The cities and towns Heating Season of northern area, generally October~Second Year April or so, by area and temperature It is determined that specific period.
10) circulating cooling water of power plant system:Contain used heat cooling system for take away power plant's main steam turbine steam discharge.Power plant Recirculating cooling water system includes cooling tower, water circulating pump and relevant connection pipe-line system.
11) auxiliary power consumption:Refer to that Controlling Auxiliaries in Power Plants equipment runs necessary electrisity consumption.

Claims (6)

1. feed pump turbine low-vacuum-operating circulating water heating system, includes feed pump turbine group, cooling tower (2) And space-heating installation, it is characterised in that:Feed pump turbine group includes several feed pump turbine structures, feed pump turbine One of the input of recirculated water water side connection switching valve (9) of structure, output end of switching valve (9) pass sequentially through heat supply network circulation The recirculated water water inlet end of water pump structure (10), heat exchangers for district heating structure (7) connection space-heating installation (6), space-heating installation (6) Recirculated water backwater end forms heating recirculated water by the recirculated water water inlet end of one of switch valve connection feed pump turbine structure Loop (4);The recirculated water water inlet end of two companies' cooling tower (2) of the output end of switching valve (9), the recirculated water backwater of cooling tower (2) The recirculated water water inlet end of the two connection feed pump turbine structures that end passes through switch valve, forms non-heating circular water-loop (3); Each feed pump turbine structure is connected and composed by feed pump turbine (1) and condenser (5), specifically in feed pump turbine (1) condenser (5) is set on, the adding for thermal source heat exchanger by feed pump turbine (1) low-vacuum-operating, condenser (5) is formed Heat supply network circulating water structure, or the operation of feed pump turbine (1) high vacuum is formed, condenser (5) is cold for cooling heat exchanger But circulating water structure.
2. feed pump turbine low-vacuum-operating circulating water heating system according to claim 1, it is characterised in that: The heat exchangers for district heating structure (7) is composed in parallel by several heat exchangers for district heatings.
3. feed pump turbine low-vacuum-operating circulating water heating system according to claim 1, it is characterised in that: The circulation pump of heat-supply network structure (10) is connected by several water pumps, and several are composed in parallel.
4. feed pump turbine low-vacuum-operating circulating water heating system according to claim 1, it is characterised in that: Regulating valve (7-1) is provided with the junction of heat exchangers for district heating structure (7) and circulation pump of heat-supply network structure (10).
5. feed pump turbine low-vacuum-operating circulating water heating system according to claim 1, it is characterised in that: In the recirculated water backwater end of space-heating installation (6) electric water filter is provided with the input junction of one of switch valve(8).
6. feed pump turbine low-vacuum-operating circulating water heating system according to claim 5, it is characterised in that: The input of three connections circulation pump of heat-supply network structure (10) that the output end of electric water filter (8) passes through switch valve.
CN201620991879.5U 2016-08-30 2016-08-30 Feed pump turbine low-vacuum-operating circulating water heating system Active CN206310568U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106225039A (en) * 2016-08-30 2016-12-14 中国能源建设集团广东省电力设计研究院有限公司 Feed pump turbine low-vacuum-operating circulating water heating system and power-economizing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106225039A (en) * 2016-08-30 2016-12-14 中国能源建设集团广东省电力设计研究院有限公司 Feed pump turbine low-vacuum-operating circulating water heating system and power-economizing method thereof

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