CN113790087A - 燃煤发电机组回热系统凝结水能量利用装置 - Google Patents

燃煤发电机组回热系统凝结水能量利用装置 Download PDF

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Publication number
CN113790087A
CN113790087A CN202111201202.9A CN202111201202A CN113790087A CN 113790087 A CN113790087 A CN 113790087A CN 202111201202 A CN202111201202 A CN 202111201202A CN 113790087 A CN113790087 A CN 113790087A
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coal
water
condensed water
regenerative system
generator set
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李建锋
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Beijing Zhongdian Changfeng Energy Saving Technology Co ltd
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Beijing Zhongdian Changfeng Energy Saving Technology Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/40—Use of two or more feed-water heaters in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/345—Control or safety-means particular thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/004—Valve arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Abstract

本发明公开了一种燃煤发电机组回热系统凝结水能量利用装置，其特征在于，包括加热器、水轮机、阀门、发电机，燃煤发电机组回热系统的2个相邻加热器之间的调节阀旁安装有旁路，旁路上安装有一个水轮机，水轮机的进出口均安装有阀门，水轮机的转轴与发电机相连接。

Description

燃煤发电机组回热系统凝结水能量利用装置
技术领域
本发明涉及一种燃煤发电机组回热系统凝结水能量利用装置。
背景技术
在大型火力发电厂中，为了提高系统效率，一般都采用多级回热的方法，即在汽轮机中多个部位抽取部分蒸汽，通过多个换热器将抽汽的热量释放给锅炉给水，从而逐渐提高给水的温度，最终提高火力发电厂的循环效率。抽汽在加热器内加热给水后将凝结成水，采用调节阀减压自流的方式进入下一级加热器内，并最终汇入锅炉给水中。具体而言，即回热系统的1号高压加热器凝结水将减压自流进入2号高压加热器、2号高压加热器的凝结水将流入3 号高压加热器，3号高压加热器的凝结水将流入除氧器内。同样的，低压加热器的凝结水也遵循同样的规律，最终全部流入汽轮机凝汽器的热水井。热水井里面的凝结水被凝结水泵加压，依次流经8号、7号、6号、5号低压加热器后进入除氧器，然后再经过给水泵加压后依次流经3号、2号、1号高压加热器进入锅炉省煤器。
这个系统尽管可以把抽汽的热量进行了充分地利用，但是却没有能够充分利用抽汽的压力能，比如600MW的火力发电机组，1级抽汽的压力一般在5～7MPa，即1号高压加热器的凝结水压力也在5～7MPa，但是除氧器的压力却仅有0.7～0.9MPa，因此，目前的逐级自流方式并没有能够将凝结水的压力能充分利用起来，而是白白浪费了。
发明内容
针对现有技术存在的不足，本发明旨在提供一种能够利用加热器凝结水压力能的装置。
本发明采用的技术方案为：一种燃煤发电机组回热系统凝结水能量利用装置，其特征在于，包括加热器、水轮机、阀门、发电机，燃煤发电机组回热系统的2个相邻加热器之间的调节阀旁安装有旁路，旁路上安装有水轮机，水轮机的进出口均安装有阀门，水轮机的转轴与发电机相连接。
本发明结构简单，投资较小，可以提高电厂的供电效率。
附图说明
附图1是本发明的示意图。
具体实施方式
下面结合附图对本发明作进一步详细的描述。
附图标记说明如下：
1、4、7——高压加热器 2、5、8——旁路调节阀门
1、3——加热器 2——调节阀 4——加热器凝结水出口
5、8——截止阀 6——发电机 7——水轮机
9——加热器凝结水进口
在图1所示的实施例中，燃煤发电机组回热系统的2个相邻加热器1与加热器3之间的调节阀2旁安装有旁路，旁路上安装有水轮机7，水轮机7的进口安装有截止阀8、出口安装有截止阀5，水轮机7与发电机6相连接。
在燃煤火力发电机组正常发电过程中，加热器1与加热器3之间的调节阀2关闭，旁路截止阀5与截止阀8打开，这样加热器1流出的凝结水即可驱动水轮机7旋转，水轮机7带动发电机6发电，从水轮机7中流出的水进入加热器3中。在水轮机7出现故障或需要维修时，可以关闭水轮机7进口处截止阀8和出口处截止阀5，同时打开调节阀2，同时，这样整个燃煤发电机组仍然可以正常运行。
本发明不局限于上述最佳实施方式，任何人在本发明的启示下都可得出其它各种形式的产品。但不论在其形状或结构上作任何变化，凡是与本发明相同或相近似的技术方案，均在其保护范围之内。

Claims (1)

1.一种一种燃煤发电机组回热系统凝结水能量利用装置，其特征在于，包括加热器、水轮机、阀门、发电机，燃煤发电机组回热系统的2个相邻加热器之间的调节阀旁安装有旁路，旁路上安装有水轮机，水轮机的进出口均安装有阀门，水轮机的转轴与发电机相连接。
CN202111201202.9A 2021-10-15 2021-10-15 燃煤发电机组回热系统凝结水能量利用装置 Pending CN113790087A (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103322551A (zh) * 2012-03-19 2013-09-25 李建锋 火力发电厂高压加热器的能量回收方法
CN104314628A (zh) * 2014-10-14 2015-01-28 华电电力科学研究院 一种燃煤机组与燃气轮机联合发电系统
CN107355268A (zh) * 2017-08-15 2017-11-17 西安西热节能技术有限公司 一种燃煤机组多能互补控制系统及方法
CN112178620A (zh) * 2020-11-05 2021-01-05 北京中电长峰节能科技有限公司 火力发电厂高压加热器凝结水能量利用装置
US20210033004A1 (en) * 2019-03-11 2021-02-04 Univ Xi An Jiaotong Flexible coal-fired power generation system and operation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103322551A (zh) * 2012-03-19 2013-09-25 李建锋 火力发电厂高压加热器的能量回收方法
CN104314628A (zh) * 2014-10-14 2015-01-28 华电电力科学研究院 一种燃煤机组与燃气轮机联合发电系统
CN107355268A (zh) * 2017-08-15 2017-11-17 西安西热节能技术有限公司 一种燃煤机组多能互补控制系统及方法
US20210033004A1 (en) * 2019-03-11 2021-02-04 Univ Xi An Jiaotong Flexible coal-fired power generation system and operation method thereof
CN112178620A (zh) * 2020-11-05 2021-01-05 北京中电长峰节能科技有限公司 火力发电厂高压加热器凝结水能量利用装置

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Application publication date: 20211214