CN101936669A - Hybrid high-efficiency and composite condensation method and condenser - Google Patents

Hybrid high-efficiency and composite condensation method and condenser Download PDF

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Publication number
CN101936669A
CN101936669A CN 201010269871 CN201010269871A CN101936669A CN 101936669 A CN101936669 A CN 101936669A CN 201010269871 CN201010269871 CN 201010269871 CN 201010269871 A CN201010269871 A CN 201010269871A CN 101936669 A CN101936669 A CN 101936669A
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condenser
vaporation
type condenser
air cooling
condensate
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CN101936669B (en
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董晓强
李占强
李俊梅
杜少旭
申德用
李卫
张勤铎
金元勇
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Longhua Technology Group (Luoyang) Limited by Share Ltd
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LUOYANG LONGHUA HEAT TRANSFER TECHNOLOGY Co Ltd
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Abstract

The invention discloses a hybrid high-efficiency and composite condensation method and a condenser. An air-cooled condenser (13) and a first evaporative condenser (16) are connected in parallel to exchange heat; waste steam delivered by a steam exhaust pipeline of a steam turbine is delivered to an air-cooled heat exchange downstream tube bundle of the air-cooled condenser (13) and an evaporative heat exchange downstream tube bundle of the first evaporative condenser (16) through a steam distribution pipe (12) for parallel heat exchange; and the waste steam which is subjected to parallel heat exchange performs serial heat exchange with an evaporative heat exchange counter-flow tube bundle of a second evaporative condenser. The condenser has the water-saving advantages of the air-cooled condenser and the advantages of high heat exchange efficiency, energy conservation, low condensation back pressure and the like of the evaporative condenser; and a system runs stably, safely and reliably.

Description

Efficient compound condensing method of a kind of series parallel type and condenser
Technical field
The present invention relates to the condenser technical field of exhaust steam condensation, relate in particular to efficient compound condensing method of a kind of series parallel type and condenser.
Background technology
At present, the process that condensing power plant produces electric energy is the process of a power conversion, the chemical energy that is fuel is transformed into saturated vapor by boiler 1 with water, saturated vapor becomes superheated steam after superheater 2 is overheated, the superheated steam acting of in steam turbine 3, expanding, change the heat energy of steam into mechanical energy, by generator 4 the most at last mechanical energy convert electric energy to.The low-pressure saturated steam that expands after doing work is condensed into condensate water through condenser 5, deliver to condensate polishing system by condensate pump 6 then, it is recycling to get back to boiler 1 after the processing, promptly delivering to condensate water precision processing center 7 by condensate pump 6 handles, condensate water after the processing enters deaerating plant 9 after low-pressure heater 8 heating, deliver to high-pressure heater 11 by feed pump 10 again, it is recycling that permanent set water is got back to boiler 1 once more, as shown in Figure 1.
In order to improve the conversion ratio of energy, reduce thermal loss as far as possible, the efficient of the core steam turbine 3 of raising system is particularly crucial.The condensing effect of condenser 5 has determined the vacuum of steam turbine in power plant system, and the vacuum of steam turbine directly affects the efficient of steam turbine 3, so the choose reasonable of condenser 5 plays key effect to the efficient of power plant.
Be rich coal and the area of lack of water in NORTHWEST CHINA, North China, so power plant has all adopted Direct Air-Cooled formula condensing system mostly, but when summer or environment temperature were higher, air cooling condensing effect descended significantly, and the generated energy of unit also descends thereupon; And be peak times of power consumption summer, and low excessively generating efficiency has a strong impact on the normal operation of national economic system, and the solution of this problem is imminent.Normal direct air cooling system and the indirect air cooling system of adopting in the existing power plant condensing system, described direct air cooling system, adopt turbine discharge to deliver in the finned-tube bundle of air cooling tubes condenser 13 through steam-distributing pipe 12, the cooling air condenses by the steam that axial flow blower 14 will flow finned tube outside in will managing, and the condensate water that obtains enters condensate tank 15 and then delivers to boiler by condensate pump 6 and carry out recycling.This system does not need intermediate cooling mediums such as cooling water, and initial temperature differences is big.Equipment is few, and system is simple, and capital expenditure is less, takes up an area of few.The adjusting of air capacity is flexible, and the preventing freeze in winter measure is reliable.But, also increased noise simultaneously because Direct Air-Cooled adopts forced ventilation mostly, thereby has increased the station-service electric weight.And its heat exchange effect is subject to external environment dry bulb temperature ball impact, and temperature is high eventually by cold medium, back pressure height, generating efficiency instability.And the Hai Le system of indirect air cooling system and Harmon system equipment complexity, investment, production cost height.
Summary of the invention
For solving the problems of the technologies described above, the invention provides efficient compound condensing method of a kind of series parallel type and condenser; The advantage of existing air cooling tubes condenser water saving has vaporation-type condenser heat exchange efficiency height, energy-conservation, advantage such as the condensing back pressure is low again; And system is stable, and is safe and reliable.
For achieving the above object, the present invention adopts following technical scheme:
The efficient compound condensing method of a kind of series parallel type, adopt the air cooling tubes condenser and the first vaporation-type condenser parallel heat exchanging, the evaporation and heat-exchange following current that the exhaust steam that the turbine discharge pipeline is carried is delivered to the air cooling heat exchange following current tube bank of air cooling tubes condenser and the first vaporation-type condenser through steam-distributing pipe is restrained and is carried out parallel heat exchanging; Exhaust steam behind parallel heat exchanging is restrained the heat exchange of connecting with the evaporation and heat-exchange adverse current of the second vaporation-type condenser again; Be about to the adverse current that the exhaust steam after the following current tube bank heat exchange of the following current tube bank by air cooling tubes condenser and the first vaporation-type condenser delivers to the second vaporation-type condenser by the condensate water header and restrain, carry out evaporation and heat-exchange once more; Condensate water comes together in the condensate water header in the second vaporation-type condenser, and entering condensate tank by pipeline, to send into condensate polishing system by condensate pump recycling; Incoagulable gas is discharged by pumped vacuum systems on the adverse current tube bank top of the second vaporation-type condenser.
A kind of series parallel type condenser, comprise: air cooling tubes condenser, the first vaporation-type condenser, the second vaporation-type condenser, the steam-distributing pipe of carrying blow-off line to be communicated with steam turbine directly feeds the air cooling tubes condenser and the first vaporation-type condenser, be communicated with the condensate water header by the following current tube bank of air cooling tubes condenser, the following current tube bank of the first vaporation-type condenser, the condensate water header is communicated with pumped vacuum systems by the tube bank of the second vaporation-type condenser adverse current, and described condensate water header is communicated with condensate tank by pipeline.
Described series parallel type condenser, the top of air cooling tubes condenser is provided with axial flow blower.
Described series parallel type condenser, the first vaporation-type condenser is provided with spray system, water collection device, axial flow blower; The condensate water header below of the first vaporation-type condenser is provided with air intake window and water tank.
Described series parallel type condenser, the second vaporation-type condenser is provided with spray system, water collection device, axial flow blower; The condensate water header below of the second vaporation-type condenser is provided with air intake window and water tank.
Because adopt aforesaid technical scheme, the present invention has following superiority:
1, the advantage of existing air cooling tubes condenser heat exchange water saving has vaporation-type condenser heat exchange efficiency height, energy-conservation, advantage such as the condensing back pressure is low again; And system is stable, and is safe and reliable.
When 2, air cooling tubes condenser can satisfy system's needs when environment temperature is low, the vaporation-type condenser can be sentenced closed condition, and condenser is water consumption not fully.
3, when environment temperature is higher than a certain temperature, when air cooling tubes condenser can not be satisfied the demand, open the vaporation-type condenser, because of the vaporation-type condenser adopts the latent heat heat transfer mechanism, good effect of heat exchange, the condensing back pressure is low, and water consumption is little; The overall water consumption of condenser is little.
Description of drawings
Fig. 1 is existing direct air cooled condenser user mode figure;
Fig. 2 is the exhaust steam of the present invention user mode schematic diagram that condenses;
Among the figure: 1-boiler, 2-superheater, 3-steam turbine, 4-generator, the 5-condenser, 6-condensate pump, 7-condensate water precision processing center, the 8-low-pressure heater, 9-deaerating plant, 10-feed pump, the 11-high-pressure heater, 12-steam-distributing pipe, 13-air cooling tubes condenser, the 14-axial flow blower, 15-condensate tank, the 16-first vaporation-type condenser, the 17-second vaporation-type condenser, 18-pumped vacuum systems, 19-condensate water header.
The specific embodiment
As shown in Figure 2: the efficient compound condensing method of a kind of series parallel type, adopt air cooling tubes condenser in parallel with the first vaporation-type condenser, the series parallel type condenser of connecting with the second vaporation-type condenser again and constituting, in the series parallel type condenser, exhaust steam enters air cooling tubes condenser 13 following currents tube bank and the first vaporation-type condenser, 16 following currents tube bank by steam-distributing pipe 12, and air cooling tubes condenser 13 following currents tube bank is the air cooling heat exchange, and the first vaporation-type condenser, 16 following currents tube bank is evaporation and heat-exchange; Uncooled exhaust steam enters the intrafascicular evaporation and heat-exchange that carries out once more of the second vaporation-type condenser, 17 reverse stream pipes along condensate water header 19 in air cooling tubes condenser 13 following currents tube bank and the first vaporation-type condenser, the 16 following currents tube bank; Incoagulable gas is discharged by the pumped vacuum systems 18 on the second vaporation-type condenser, 17 adverse currents tube bank top, comes together in the condensate water in the condensate water header 19, introduces condensate tank 15 by pipeline, and it is recycling to deliver to condensate polishing system by condensate pump 6 again.
As shown in Figure 2: a kind of series parallel type condenser, comprise: air cooling tubes condenser 13, the first vaporation-type condenser 16, the second vaporation-type condenser 17, the steam-distributing pipe 12 of carrying blow-off line to be communicated with steam turbine directly feeds air cooling tubes condenser, the first vaporation-type condenser, and the steam-distributing pipe 12 that is positioned at air cooling tubes condenser 13 is communicated with condensate water header 19 by the following current tube bank; The steam-distributing pipe 12 that is positioned at the first vaporation-type condenser 16 is communicated with condensate water header 19 by the following current tube bank; The following current tube bank of air cooling tubes condenser, the following current tube bank of the first vaporation-type condenser are communicated with the adverse current tube bank of the second vaporation-type condenser by condensate water header 19; The end of second vaporation-type condenser adverse current tube bank is provided with pumped vacuum systems 18; The condensate water header is communicated with condensate tank 15 by pipeline 19.The top of described air cooling tubes condenser 13 is provided with axial flow blower 14.
Steam-distributing pipe 12 tops in the described first vaporation-type condenser 16 are provided with spray system, water collection device, axial flow blower; Condensate water header 19 belows in the first vaporation-type condenser are provided with air intake window and water tank.
The described second vaporation-type condenser, 17 adverse currents tube bank top is provided with spray system, water collection device, axial flow blower; Condensate water header 19 belows in the second vaporation-type condenser are provided with air intake window and water tank.
Efficient compound condensing method of a kind of series parallel type and series parallel type condenser that the present invention proposes are to change the tube bank of the part in traditional air cooling tubes condenser into evaporation and heat-exchange by the air cooling heat exchange, and based on the air cooling heat exchange, evaporation and heat-exchange is auxilliary.In the series-parallel connection condenser, adopt air cooling and the cold parallel heat exchanging of evaporation between the following current tube bank, the employing heat exchange of connecting between following current tube bank and the adverse current tube bank; Especially be useful in the condense application in field of general vapour.
A kind of course of work of series parallel type condenser: be that air cooling tubes condenser 13 is in parallel with the first vaporation-type condenser 16, the formation of connecting with the second vaporation-type condenser 17 again after the parallel connection; In the series-parallel connection condenser, exhaust steam enters air cooling tubes condenser 13 following currents tube bank and the first vaporation-type condenser, 16 following currents tube bank by steam-distributing pipe 12, and air cooling tubes condenser 13 following currents tube bank is the air cooling heat exchange, the first vaporation-type condenser, 16 following currents tube bank is evaporation and heat-exchange, because both are relation in parallel, so back pressure can be consistent.Air cooling tubes condenser 13 following currents tube bank and 16 following currents of the first vaporation-type condenser are restrained uncooled exhaust steam and are entered the intrafascicular evaporation and heat-exchange that carries out once more of the second vaporation-type condenser, 17 reverse stream pipes along condensate water header 19.Incoagulable gas is discharged by pumped vacuum systems 18 on the second vaporation-type condenser, 17 adverse currents tube bank top, condensate water comes together in the condensate water header 19, introduce condensate tank 15 by the pipeline that the second vaporation-type condenser 17 is provided with, it is recycling to send into condensate polishing system by condensate pump 6 again.
1, the efficient compound condensing method of a kind of series parallel type, it is characterized in that: adopt the air cooling tubes condenser (13) and first vaporation-type condenser (16) parallel heat exchanging, the evaporation and heat-exchange following current that the exhaust steam that the turbine discharge pipeline is carried is delivered to the air cooling heat exchange following current tube bank of air cooling tubes condenser (13) and the first vaporation-type condenser (16) through steam-distributing pipe (12) is restrained and is carried out parallel heat exchanging; Exhaust steam behind parallel heat exchanging is restrained the heat exchange of connecting with the evaporation and heat-exchange adverse current of the second vaporation-type condenser (17) again; The following current that is about to the following current tube bank by air cooling tubes condenser (13) and the first vaporation-type condenser (16) is restrained the adverse current that the exhaust steam after the heat exchange delivers to the second vaporation-type condenser (17) by condensate water header (19) and is restrained, and carries out evaporation and heat-exchange once more; Condensate water comes together in the condensate water header (19) in the second vaporation-type condenser (17), and entering condensate tank (15) by pipeline, to send into condensate polishing system by condensate pump (6) recycling; Incoagulable gas is discharged by pumped vacuum systems (18) on the adverse current tube bank top of the second vaporation-type condenser (17).
2, implement a kind of series parallel type condenser of said method, it is characterized in that: comprising: air cooling tubes condenser (13), the first vaporation-type condenser (16), the second vaporation-type condenser (17), the steam-distributing pipe (12) of carrying blow-off line to be communicated with steam turbine directly feeds the air cooling tubes condenser (13) and the first vaporation-type condenser (16), following current tube bank by air cooling tubes condenser (13), the following current tube bank of the first vaporation-type condenser (16) is communicated with condensate water header (19), condensate water header (19) is communicated with pumped vacuum systems by the adverse current tube bank of the second vaporation-type condenser (17), and described condensate water header (19) is communicated with condensate tank (15) by pipeline.
3, series parallel type condenser as claimed in claim 2 is characterized in that: the top of air cooling tubes condenser (13) is provided with axial flow blower (14).
4, series parallel type condenser as claimed in claim 2 is characterized in that: the first vaporation-type condenser (16) is provided with spray system, water collection device, axial flow blower; Condensate water header below in the first vaporation-type condenser (16) is provided with air intake window and water tank.
5, series parallel type condenser as claimed in claim 2 is characterized in that: the second vaporation-type condenser (17) is provided with spray system, water collection device, axial flow blower; The condensate water header below of the second vaporation-type condenser (17) is provided with air intake window and water tank.
The present invention discloses efficient compound condensing method of a kind of series parallel type and condenser, adopt the air cooling tubes condenser (13) and first vaporation-type condenser (16) parallel heat exchanging, the evaporation and heat-exchange following current that the exhaust steam that the turbine discharge pipeline is carried is delivered to the air cooling heat exchange following current tube bank of air cooling tubes condenser (13) and the first vaporation-type condenser (16) through steam-distributing pipe (12) is restrained and is carried out parallel heat exchanging; Exhaust steam behind parallel heat exchanging is restrained the heat exchange of connecting with the evaporation and heat-exchange adverse current of the second vaporation-type condenser (17) again.The advantage of the existing air cooling tubes condenser of the present invention water saving has vaporation-type condenser heat exchange efficiency height, energy-conservation, advantage such as the condensing back pressure is low again; And system is stable, and is safe and reliable.

Claims (5)

1. efficient compound condensing method of series parallel type, it is characterized in that: adopt the air cooling tubes condenser (13) and first vaporation-type condenser (16) parallel heat exchanging, the evaporation and heat-exchange following current that the exhaust steam that the turbine discharge pipeline is carried is delivered to the air cooling heat exchange following current tube bank of air cooling tubes condenser (13) and the first vaporation-type condenser (16) through steam-distributing pipe (12) is restrained and is carried out parallel heat exchanging; Exhaust steam behind parallel heat exchanging is restrained the heat exchange of connecting with the evaporation and heat-exchange adverse current of the second vaporation-type condenser (17) again; The following current that is about to the following current tube bank by air cooling tubes condenser (13) and the first vaporation-type condenser (16) is restrained the adverse current that the exhaust steam after the heat exchange delivers to the second vaporation-type condenser (17) by condensate water header (19) and is restrained, and carries out evaporation and heat-exchange once more; Condensate water comes together in the condensate water header (19) in the second vaporation-type condenser (17), and entering condensate tank (15) by pipeline, to send into condensate polishing system by condensate pump (6) recycling; Incoagulable gas is discharged by pumped vacuum systems (18) on the adverse current tube bank top of the second vaporation-type condenser (17).
2. implement a kind of series parallel type condenser of said method, it is characterized in that: comprising: air cooling tubes condenser (13), the first vaporation-type condenser (16), the second vaporation-type condenser (17), the steam-distributing pipe (12) of carrying blow-off line to be communicated with steam turbine directly feeds the air cooling tubes condenser (13) and the first vaporation-type condenser (16), following current tube bank by air cooling tubes condenser (13), the following current tube bank of the first vaporation-type condenser (16) is communicated with condensate water header (19), condensate water header (19) is communicated with pumped vacuum systems by the adverse current tube bank of the second vaporation-type condenser (17), and described condensate water header (19) is communicated with condensate tank (15) by pipeline.
3. series parallel type condenser as claimed in claim 2 is characterized in that: the top of air cooling tubes condenser (13) is provided with axial flow blower (14).
4. series parallel type condenser as claimed in claim 2 is characterized in that: the first vaporation-type condenser (16) is provided with spray system, water collection device, axial flow blower; Condensate water header below in the first vaporation-type condenser (16) is provided with air intake window and water tank.
5. series parallel type condenser as claimed in claim 2 is characterized in that: the second vaporation-type condenser (17) is provided with spray system, water collection device, axial flow blower; The condensate water header below of the second vaporation-type condenser (17) is provided with air intake window and water tank.
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102384670A (en) * 2011-10-11 2012-03-21 杭州杭氧换热设备有限公司 Auxiliary device for insufficient load of air cooling island of air separation plant in summer
CN102393153A (en) * 2011-07-11 2012-03-28 华东理工大学 Condensation mode and condensing unit of steam turbine set used in summer peak
US20140202151A1 (en) * 2013-01-21 2014-07-24 Alliance For Sustainable Energy, Llc Hybrid Air-Cooled Condenser For Power Plants and Other Applications
CN104279884A (en) * 2014-08-08 2015-01-14 北京大学工学院包头研究院 Direct air cooling condenser temperature lowering system
RU2561799C1 (en) * 2014-08-14 2015-09-10 Акционерное общество "Опытное Конструкторское Бюро Машиностроения имени И.И. Африкантова" (АО "ОКБМ Африкантов") Air cooling heat exchange unit
CN105080177A (en) * 2015-09-14 2015-11-25 李永堂 Efficient separation and vacuum condensation system for non-condensable gas
CN108662915A (en) * 2018-07-19 2018-10-16 河南省九冶化工设备有限公司 The indirect heat exchange vaporization type condensing system of the general vapour of concentration evaporator system end effect
US10132568B2 (en) 2015-08-20 2018-11-20 Holtec International Dry cooling system for powerplants
US10161683B2 (en) 2015-08-20 2018-12-25 Holtec International Dry cooling system for powerplants
DE102017130807A1 (en) * 2017-12-20 2019-06-27 Enexio Germany Gmbh Air-cooled condenser system
CN113670085A (en) * 2021-08-13 2021-11-19 广州环投福山环保能源有限公司 Cold end optimization scheduling system and method for waste incineration power plant
CN113983452A (en) * 2021-09-18 2022-01-28 杭州中能汽轮动力有限公司 Parallel peak cooling air-cooled steam turbine generator unit and condensing method

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Publication number Priority date Publication date Assignee Title
CN102393153A (en) * 2011-07-11 2012-03-28 华东理工大学 Condensation mode and condensing unit of steam turbine set used in summer peak
CN102384670A (en) * 2011-10-11 2012-03-21 杭州杭氧换热设备有限公司 Auxiliary device for insufficient load of air cooling island of air separation plant in summer
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CN104279884A (en) * 2014-08-08 2015-01-14 北京大学工学院包头研究院 Direct air cooling condenser temperature lowering system
RU2561799C1 (en) * 2014-08-14 2015-09-10 Акционерное общество "Опытное Конструкторское Бюро Машиностроения имени И.И. Африкантова" (АО "ОКБМ Африкантов") Air cooling heat exchange unit
US10132568B2 (en) 2015-08-20 2018-11-20 Holtec International Dry cooling system for powerplants
US10161683B2 (en) 2015-08-20 2018-12-25 Holtec International Dry cooling system for powerplants
CN105080177A (en) * 2015-09-14 2015-11-25 李永堂 Efficient separation and vacuum condensation system for non-condensable gas
DE102017130807A1 (en) * 2017-12-20 2019-06-27 Enexio Germany Gmbh Air-cooled condenser system
CN108662915A (en) * 2018-07-19 2018-10-16 河南省九冶化工设备有限公司 The indirect heat exchange vaporization type condensing system of the general vapour of concentration evaporator system end effect
CN113670085A (en) * 2021-08-13 2021-11-19 广州环投福山环保能源有限公司 Cold end optimization scheduling system and method for waste incineration power plant
CN113983452A (en) * 2021-09-18 2022-01-28 杭州中能汽轮动力有限公司 Parallel peak cooling air-cooled steam turbine generator unit and condensing method

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