CN205065867U - Indirect air cooling unit steam turbine steam exhaust waste heat recovery is used for heat supply network circulation water heating system - Google Patents

Indirect air cooling unit steam turbine steam exhaust waste heat recovery is used for heat supply network circulation water heating system Download PDF

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Publication number
CN205065867U
CN205065867U CN201520783784.XU CN201520783784U CN205065867U CN 205065867 U CN205065867 U CN 205065867U CN 201520783784 U CN201520783784 U CN 201520783784U CN 205065867 U CN205065867 U CN 205065867U
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China
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supply network
heat supply
heat
condenser
water
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魏显安
张波
裴育峰
王钟
赵连东
于凤新
郑乐宇
孟令国
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Northeast Electric Power Design Institute of China Power Engineering Consulting Group
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Northeast Electric Power Design Institute of China Power Engineering Consulting Group
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Abstract

The utility model provides an indirect air cooling unit steam turbine steam exhaust waste heat recovery is used for heat supply network circulation water heating system which characterized in that: including the intercooling tower, host computer circulating water pump, the condenser, heat supply network circulating water pump, heating network heater, heat supply network return water booster pump, heat supply network return water pipe is connected to the female pipe department of host computer condenser entry through circulating water dish valve all the way, another sweetgum fruit is crossed heat supply network return water booster pump and is connected to the female pipe department of condenser export, the host computer condenser is connected with the intercooling tower on the one hand, on the other hand passes through heat supply network circulating water pump and connects heating network heater, heating network heater is connected to heat supply network water supply pipe, host computer circulating water pump installs between intercooling tower and condenser. The utility model discloses waste heat recovery is used for heating system to creat to the intercooling unit, and system's investment is relatively low, and the system is simple reliable, has huge energy -conserving benefit, environmental protection profit, social and economic benefits. The industrial policy that accords with the important core " energy saving and emission reduction " of national social economic development.

Description

Indirect air cooling power generator turbine exhausted spare heat reclaims and is used for heat supply network circulating water heating system
Technical field
The utility model relates to a kind of circulating water heating system, especially a kind of indirect air cooling thermal power plant unit is related on the basis not changing turbine body, indirect cool tower present situation, turbine exhaust heat is fully reclaimed and is used for heat supply network circulating water heating system, significantly improve heat capacity and the efficiency of energy utilization of power plant.
Background technology
China is one of maximum in the world greenhouse gas emission state at present, and " energy-saving and emission-reduction " are important core of " 12 " period Chinese society economic development.Improving energy utilization rate, strengthening heat recovery is economize energy, the essential measure reducing carbon emission, protection of the environment.
The cold end loss in thermal power plant is the maximum loss of power plant thermal system.For power plant, specified under thermal condition in the winter time, turbine discharge loss can account for more than 39% of fuel gross calorific power.Turbine discharge loss is waste heat discharge for thermal power plant, but for low-grade building and heating, then forms huge energy waste.If exhaust steam in steam turbine waste heat can fully reclaim for heat supply, will significantly improve heat capacity and the efficiency of energy utilization of power plant, bring huge energy-saving benefit, environmental benefit and social benefit.
At present, indirect air cooling generating set utilizes exhaust steam in steam turbine low temperature exhaust heat to reclaim the cogeneration of heat and power technology of cold source energy, be mainly absorption heat pump heat supply technology, absorption heat pump need utilize high temperature heat source as driving working medium, extract the heat of low-temperature circulating water thermal source, utilize the exhaust steam residual heat of part steam turbine.For indirect air cooling thermal power plant unit, this technology need build lithium bromide absorption type heat pump, and quantity is more, it is huge to invest, and there is lithium bromide absorption type heat pump comparative lifetime shorter, the problems such as maintenance cost is high, significantly limit the development in exhaust steam in steam turbine waste heat recovery field.
Utility model content
For the problems referred to above, the utility model is based on indirect air cooling thermal power plant unit, reformed AHP has been carried out to exhaust steam in steam turbine residual neat recovering system, on the basis not changing turbine body, indirect cool tower present situation, at Heating Period, improve the back pressure of steam turbine, the waste heat utilizing heat supply network recirculated water backwater to reclaim turbine discharge by main frame condenser carries out one-level heating, utilize unit heating to draw gas by heat exchangers for district heating again and carry out post bake, meet heat supply network water supply requirement, realize the raising of unit heating heat capacity.In the non-heat supply phase, be switched to indirect cool tower and carry out the operation of pure condensate operating mode.When heat supply network recirculated water return water temperature is too high, enters indirect cool tower after being boosted by heat supply network backwater and lower the temperature, unit back pressuce is reduced, increases exhaust steam flow, guarantee unit safety operation.
For achieving the above object, the utility model provides a kind of indirect air cooling power generator turbine exhausted spare heat to reclaim for heat supply network circulating water heating system, comprise indirect cool tower, main frame water circulating pump, circulation pump of heat-supply network, heat exchangers for district heating, heat supply network backwater booster, it is characterized in that: heat supply network water return pipeline is leaded up to recirculated water dish valve and is connected to the female pipe place of condenser entrance, heat supply network backwater booster of separately leading up to is connected to condenser and exports female pipe place, main frame condenser is connected with indirect cool tower on the one hand, heat exchangers for district heating is connected on the other hand by circulation pump of heat-supply network, heat exchangers for district heating is connected to heat supply network water supply line, main frame water circulating pump is arranged between indirect cool tower and condenser.
The beneficial effects of the utility model are:
1, adopt indirect air cooling power generator turbine exhausted spare heat to reclaim and be used for heat supply network circulating water heating system, invest low, system is simple and reliable, without the need to redesigning indirect air cooling turbine body and main frame indirect cool tower or transform, additionally do not increase project land used.
2, the utility model reclaims the waste heat of exhaust steam in steam turbine to city heat supply, reclaimed account for fuel gross calorific power more than 39% steam discharge loss, turn waste into wealth, improve energy utilization rate, produce huge energy-saving benefit.
3, adopt the utility model, power plant soot amount significantly reduces, SO 2, NO 2effectively reduce with pollutant discharge amounts such as flue dust, produce huge environmental benefit.For the target of the important core " energy-saving and emission-reduction " realizing Chinese society economic development plays positive role.
4, adopt the utility model, expand the heat capacity of steam power plant, add the area of heat-supply service of steam power plant, improve reliability of heat-supply system, effectively can alleviate the problem of part city heat supply scarce capacity, produce good social benefit.
5, to city heat supply be the important means that electric power enterprise is increased income.The utility model expands the heat capacity of steam power plant, adds the area of heat-supply service of steam power plant, too increases the income of power plant simultaneously, produces considerable economic benefit.
In sum, between the utility model pair, the waste heat recovery of cold group is used for heating system and innovates, and system investments is relatively low, and system is simple and reliable, has huge energy-saving benefit, environmental benefit, Social benefit and economic benefit.Meet the industrial policy of the important core " energy-saving and emission-reduction " of national society's economic development.
Accompanying drawing explanation
Fig. 1 is the utility model detailed description of the invention structural representation.
1, indirect cool tower; 2, main frame water circulating pump; 3, condenser; 4, circulation pump of heat-supply network; 5, heat exchangers for district heating; 6, heat supply network backwater booster; 7, recirculated water butterfly valve; 8, heat supply network water return pipeline; 9, heat supply network water supply line.
Detailed description of the invention
With reference to Fig. 1, the utility model comprises indirect cool tower 1, main frame water circulating pump 2, condenser 3, circulation pump of heat-supply network 4, heat exchangers for district heating 5, heat supply network backwater booster 6, heat supply network water return pipeline 8 is leaded up to recirculated water dish valve 7 and is connected to the female pipe place of condenser 3 entrance, heat supply network backwater booster of separately leading up to is connected to condenser and exports female pipe place, main frame condenser is connected with indirect cool tower 1 on the one hand, heat exchangers for district heating 5 is connected on the other hand by circulation pump of heat-supply network 4, heat exchangers for district heating 5 is connected to heat supply network water supply line 9, main frame water circulating pump 2 is arranged between indirect cool tower 1 and condenser 3.
Heating Period indirect Air-cooled Unit high back pressure substitutes the cooling water source of main frame recirculated water as condenser using with heat supply network recirculated water when running.Because steam turbine low pressure (LP) cylinder is through-flow and the restriction of bank of condenser pipes flow velocity; heat supply network circulating water flow will ensure the minimum cooling water inflow being not less than condenser; for guaranteeing unit safety operation; indirect air cooling unit should area operation below turbine back pressure restrictive curve alarming line; when heat supply network recirculated water return water temperature is too high; heat supply network backwater is entered indirect cool tower lower the temperature, unit back pressuce is reduced, increases exhaust steam flow, guarantee unit safety operation.Because heat supply network pressure of return water is less, cannot indirect cool tower be entered, 3 boosters (2 fortune 1 are standby) are therefore set on heat supply network water return pipeline.For the power plant having cold group between 2, heat supply network water return pipeline can be connected to pipeline place, 2 unit condenser cooling water inlets respectively, realizes the high back pressure switchover operation of 2 units.When a cold group is at back pressure 33KPa(a) operating mode run time, by condenser, heat supply network backwater is heated to 67.3 DEG C.Between recycling, the heating of cold group is drawn gas by heat exchangers for district heating heating heat supply network recirculated water, meets heat supply network water supply requirement.
The course of work: Heating Period, when heat supply network recirculated water return water temperature is not more than design temperature, heat supply network recirculated water backwater enters main frame condenser 3 by heat supply network water return pipeline 8, improve the back pressure of steam turbine, after turbine discharge carries out one-level heating to heat supply network recirculated water backwater, heat supply network recirculated water backwater is boosted by circulation pump of heat-supply network 4 and enters heat exchangers for district heating 5, after being drawn gas and carried out post bake, delivers to heat user by heat supply network water supply line 9 by steam turbine heating.When heat supply network recirculated water return water temperature is greater than design temperature, for ensureing the area operation of steam turbine below back pressure restrictive curve alarming line, heat supply network recirculated water backwater enters indirect cool tower 1 by the boosting of heat supply network backwater booster 6 and is cooled to design temperature, main frame condenser 3 is entered by main frame water circulating pump 2, improve the back pressure of steam turbine, after turbine discharge carries out one-level heating to heat supply network recirculated water backwater, heat supply network recirculated water backwater is boosted by circulation pump of heat-supply network 4 and enters heat exchangers for district heating 5, after being drawn gas carried out post bake by steam turbine heating, heat user is delivered to by heat supply network water supply line 9.

Claims (1)

1. an indirect air cooling power generator turbine exhausted spare heat reclaims and comprises indirect cool tower for heat supply network circulating water heating system, main frame water circulating pump, circulation pump of heat-supply network, heat exchangers for district heating, heat supply network backwater booster, it is characterized in that: heat supply network water return pipeline is leaded up to recirculated water dish valve and is connected to the female pipe place of condenser entrance, heat supply network backwater booster of separately leading up to is connected to condenser and exports female pipe place, main frame condenser is connected with indirect cool tower on the one hand, heat exchangers for district heating is connected on the other hand by circulation pump of heat-supply network, heat exchangers for district heating is connected to heat supply network water supply line, main frame water circulating pump is arranged between indirect cool tower and condenser.
CN201520783784.XU 2015-10-12 2015-10-12 Indirect air cooling unit steam turbine steam exhaust waste heat recovery is used for heat supply network circulation water heating system Active CN205065867U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106196229A (en) * 2016-08-30 2016-12-07 中国能源建设集团广东省电力设计研究院有限公司 Air-introduced machine steam turbine low-vacuum-operating circulating water heating system and power-economizing method thereof
CN106468190A (en) * 2016-11-18 2017-03-01 新疆华电喀什热电有限责任公司 Indirect air cooling High Back Pressure Steam Turbine Units peak load regulation network ability and the coordinated control system of heat demand

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106196229A (en) * 2016-08-30 2016-12-07 中国能源建设集团广东省电力设计研究院有限公司 Air-introduced machine steam turbine low-vacuum-operating circulating water heating system and power-economizing method thereof
CN106468190A (en) * 2016-11-18 2017-03-01 新疆华电喀什热电有限责任公司 Indirect air cooling High Back Pressure Steam Turbine Units peak load regulation network ability and the coordinated control system of heat demand
CN106468190B (en) * 2016-11-18 2018-09-25 新疆华电喀什热电有限责任公司 The coordinated control system of indirect air cooling High Back Pressure Steam Turbine Units peak load regulation network ability and heat demand

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