CN204535449U - 一种火力发电厂空冷机组、水冷机组冷端联运系统 - Google Patents

一种火力发电厂空冷机组、水冷机组冷端联运系统 Download PDF

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CN204535449U
CN204535449U CN201520231919.1U CN201520231919U CN204535449U CN 204535449 U CN204535449 U CN 204535449U CN 201520231919 U CN201520231919 U CN 201520231919U CN 204535449 U CN204535449 U CN 204535449U
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奚军
刘建亭
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Shaanxi Is Energy-Conservation Science And Technology Co Ltd Incomparably
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Abstract

本实用新型公开了一种火力发电厂空冷机组、水冷机组冷端联运系统,包括换热器和烟气换热器,换热器的进气端与空冷机组乏汽管道相连通,凝结水出口与空冷机组排汽装置热水井相连通,换热器的液相进口端经电动门与湿冷机组的凝结水管道相连,换热器的液相出口端分两路,一路经电动门与湿冷机组的低温加热器相连,一路经电动门与烟气换热器相连,烟气换热器的出口经电动门后与湿冷机组的低温加热器相连,换热器的真空接口通过真空管道与空冷机组真空系统相连接。该系统通过湿冷机组的凝结水冷却空冷机组的乏汽,降低了空冷机组的背压和空冷机组的煤耗,并通过2级提高湿冷机组的凝结水温度,提高了湿冷机组的热效率和运行经济性。

Description

一种火力发电厂空冷机组、水冷机组冷端联运系统
技术领域
本实用新型涉及火力发电厂汽轮机冷端系统,尤其涉及一种火力发电厂空冷机组、水冷机组冷端联运系统。
背景技术
目前不少电厂一期是湿冷机组,二期是空冷机组,在高温季节空冷机组运行背压偏高、热耗高,经济性差,严重影响了电厂经济性,同时湿冷机组则由于凝结水温度耗损较大,因而热效率低,机组运行的经济性差。
实用新型内容
本实用新型为了解决上述技术问题,提供了一种火力发电厂空冷机组、水冷机组冷端联运系统,降低空冷机组的背压,降低空冷机组的煤耗,提高湿冷机组的热效率,提高运行经济性。
本实用新型是通过以下技术方案来实现:
一种火力发电厂空冷机组、水冷机组冷端联运系统,包括换热器和烟气换热器,所述的换热器的进气端与空冷机组乏汽管道相连,凝结水出口与空冷机组排汽装置热水井相连通,换热器的液相进口端通过电动门与湿冷机组的凝结水管道相连通,换热器的液相出口端分两路,一路经电动门与湿冷机组的低温加热器相连通,一路经电动门与烟气换热器相连,烟气换热器的出口经电动门与湿冷机组的低温加热器相连通,换热器的真空接口通过真空管道与空冷机组真空系统相连接。
所述的换热器的液相进口端通过进口电动门后与湿冷机组的凝结水管道相连通,换热器的液相出口端一路经出口电动门与湿冷机组的低温加热器相连通。
所述的换热器的液相进口端通过进口电动门连接到湿冷机组的凝结水管道上的凝结水管道电动门前端,换热器的液相出口端一路经出口电动门连接到湿冷机组的凝结水管道上的凝结水管道电动门后端。
所述的换热器的液相出口端一路经电动门与烟气换热器凝结水进口相连,烟气换热器的凝结水出口经电动门后与湿冷机组的低温加热器相连通。
所述的换热器的进气端分两路经蒸汽管道后与空冷机组乏汽管道相连通。
与现有技术相比,本实用新型具有以下有益的技术效果:
本实用新型提供的火力发电厂空冷机组、水冷机组冷端联运系统,由于空冷机组和湿冷机组两种类型的机组在高温季节工况下排汽温度相差较大(20℃左右),如用湿冷机组凝结水冷却部分空冷机组的乏汽,同时将湿冷机组的凝结水温提高,则一方面减轻了空冷岛的负荷,降低空冷机组的背压;一方面通过空冷机组乏汽加热湿冷机组凝结水温度提高,再通过湿冷机组烟气换热器再次提高凝结水温度,大量减少回热抽汽量,降低了机组的热耗。
本实用新型提供的系统,通过湿冷机组的凝结水冷却空冷机组的乏汽,达到降低空冷机组的背压,降低空冷机组的煤耗,减低排放对环境的影响。同时,2级提高湿冷机组的凝结水温度,减少回热抽汽量,提高了湿冷机组的热效率和机组运行的经济性,达到节能的目的。
附图说明
图1为本实用新型提供的火力发电厂空冷机组、水冷机组冷端联运系统结构示意图。
其中:1为空气汽轮机低压缸;2为排气装置;3为空冷机组真空系统;4为真空泵;5为蒸汽管道;6为换热器;7为凝结水管道;8为进口电动门;9为出口电动门;10为凝结水管道电动门;11为电动门;12为烟气换热器;13为电动门;14为湿冷汽轮机低压缸;15为凝汽器;16为凝结水泵;17为轴封加热器;18为低温加热器;19为乏汽管道;20为真空管道。
具体实施方式
下面结合附图对本实用新型做进一步详细描述:
参见图1,一种火力发电厂空冷机组、水冷机组冷端联运系统,包括换热器6和烟气换热器12,所述的换热器6的进气端分两路经蒸汽管道5后与空冷机组乏汽管道19相连通,凝结水出口与空冷机组排汽装置2热水井相连通,换热器6的液相进口端通过电动门与湿冷机组的凝结水管道7相连通,换热器6的液相出口端分两路,一路经电动门与湿冷机组的低温加热器18相连通,一路经电动门与烟气换热器12相连,烟气换热器12的出口经电动门后与湿冷机组的低温加热器18相连通,换热器6的真空接口通过真空管道20与空冷机组真空系统3相连接。
具体的,所述的换热器6的液相进口端通过进口电动门8连接到湿冷机组的凝结水管道7上的凝结水管道电动门10前端,换热器6的液相出口端一路经出口电动门9连接到湿冷机组的凝结水管道7上的凝结水管道电动门10后端;所述的换热器6的液相出口端一路经电动门11与烟气换热器12凝结水进口相连,烟气换热器12的凝结水出口经电动门13后与湿冷机组的凝结水管道7相连通。
本实用新型的工作过程为:从空冷机组乏汽管道抽取部分乏汽进入换热器6,通过湿冷机组的凝结水冷却乏汽,本系统投运时,湿冷机组的凝结水管道电动门10关闭,循环水或凝结水管道的进口电动门8打开,使凝结水通过进入到换热器6中,凝结水通过换热器6换热后,经过打开的电动门11进入湿式机组的烟气换热器12再次加热,通过出口电动门13进入低温加热器18中。此时出口电动门9在关闭位置。换热器6冷却后凝结水自流至空冷机组原排汽装置2热水井,换热器6的真空口通过真空管道连接到空冷机组真空系统3,依靠原真空系统3的真空泵4保持换热器6的真空。若湿式机组烟气换热器故障,则关闭电动门11和13,打开出口电动门9,凝结水直接进入低温加热器。
本实用新型提供的火力发电厂空冷机组、水冷机组冷端联运系统,由于空冷机组和湿冷机组两种类型的机组在高温季节工况下排汽温度相差较大(20℃左右),如用湿冷机组凝结水冷却部分空冷机组的乏汽,同时将湿冷机组的凝结水温提高,则一方面减轻了空冷岛的负荷,降低空冷机组的背压;一方面通过空冷机组乏汽加热湿冷机组凝结水温度提高,再通过湿冷机组烟气换热器再次提高凝结水温度,大量减少回热抽汽量,降低了机组的热耗。
本实用新型提供的系统,通过湿冷机组的凝结水冷却空冷机组的乏汽,达到降低空冷机组的背压,降低空冷机组的煤耗,减低排放对环境的影响。同时,2级提高湿冷机组的凝结水温度,减少回热抽汽量,提高了湿冷机组的热效率和机组运行的经济性,达到节能的目的。
以上显示和描述了本实用新型的基本原理和主要特征和本实用新型的优点。本行业的技术人员应该了解,本实用新型不受上述实施例的限制,上述实施例和说明书中描述的只是说明本实用新型的原理,在不脱离本实用新型精神和范围的前提下,本实用新型还会有各种变化和改进,这些变化和改进都落入要求保护的本实用新型范围内。本实用新型要求保护范围由所附的权利要求书及其等效物界定。

Claims (5)

1.一种火力发电厂空冷机组、水冷机组冷端联运系统,其特征在于,包括换热器(6)和烟气换热器(12),所述的换热器(6)的进气端与空冷机组乏汽管道相连,凝结水出口与空冷机组排汽装置(2)热水井相连通,换热器(6)的液相进口端通过电动门与湿冷机组的凝结水管道(7)相连通,换热器(6)的液相出口端分两路,一路经电动门与湿冷机组的低温加热器(18)相连通,一路经电动门与烟气换热器(12)相连,烟气换热器(12)的出口经电动门与湿冷机组的低温加热器(18)相连通,换热器(6)的真空接口通过真空管道与空冷机组真空系统(3)相连接。
2.根据权利要求1所述的火力发电厂空冷机组、水冷机组冷端联运系统,其特征在于,所述的换热器(6)的液相进口端通过进口电动门(8)后与湿冷机组的凝结水管道(7)相连通,换热器(6)的液相出口端一路经出口电动门(9)与湿冷机组的低温加热器(18)相连通。
3.根据权利要求2所述的火力发电厂空冷机组、水冷机组冷端联运系统,其特征在于,所述的换热器(6)的液相进口端通过进口电动门(8)连接到湿冷机组的凝结水管道(7)上的凝结水管道电动门(10)前端,换热器(6)的液相出口端一路经出口电动门(9)连接到湿冷机组的凝结水管道(7)上的凝结水管道电动门(10)后端。
4.根据权利要求1所述的火力发电厂空冷机组、水冷机组冷端联运系统,其特征在于,所述的换热器(6)的液相出口端一路经电动门(11)与烟气换热器(12)凝结水进口相连,烟气换热器(12)的凝结水出口经电动门(13)后与湿冷机组的低温加热器(18)相连通。
5.根据权利要求1所述的火力发电厂空冷机组、水冷机组冷端联运系统,其特征在于,所述的换热器(6)的进气端分两路经蒸汽管道(5)后与空冷机组乏汽管道相连通。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109298690A (zh) * 2018-09-25 2019-02-01 浙江浙能技术研究院有限公司 一种开式循环水冷端系统优化控制方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109298690A (zh) * 2018-09-25 2019-02-01 浙江浙能技术研究院有限公司 一种开式循环水冷端系统优化控制方法

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