注汽锅炉真空除氧器给水加热系统
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摘要
针对注汽锅炉真空除氧器冬季产水含氧量严重超标这一情况,分析真空除氧器除氧运行的特点,利用注汽锅炉已有的低压蒸汽,设计了一套全自动给水蒸汽加热系统,该系统采用管壳式换热器作为水蒸汽换热器,蒸汽经计量喷嘴和调节阀后进入换热器,冷凝水进入除氧器的回收水箱,采用PLC作为控制器,触摸屏作为人机界面,采集给水流量,通过热平衡原理对加热后水温度进行建模,计算出所需加热的蒸汽量,采集喷嘴差压,计算出蒸汽流量,经PID控制器调节蒸汽流量,使给水温度加热到预定值,保证真空除氧器产水含氧达标,该系统在油田稠油开采行业具有推广应用价值。
In this article,in view of the fact that the oxygen content of the vacuum deaerator in the steam injection boiler is seriously exceeding the standard in the winter,the characteristics of the deaerator in the vacuum deaerator are analyzed.a set of automatic water heating steam heating system was designed,by using the low pressure steam of the steam injection boiler,the system uses shell-and-tube heat exchanger as water vapor steam heat exchanger,the steam through the measurement of the nozzle and control valve into the heat exchanger,the condensate into the deaerator recovery tank,the use of PLC as a controller,touch screen As the man-machine interface,collecting water flow,through the principle of heat balance after heating the water temperature modeling,calculate the required heating steam,the nozzle differential pressure to calculate the steam flow,the PID controller to regulate the steam flow,The temperature is heated to a predetermined value,and the oxygen production rate of the vacuum deaerator is ensured.The system has the application value in the heavy oil extraction industry of the oil field.
In this article,in view of the fact that the oxygen content of the vacuum deaerator in the steam injection boiler is seriously exceeding the standard in the winter,the characteristics of the deaerator in the vacuum deaerator are analyzed.a set of automatic water heating steam heating system was designed,by using the low pressure steam of the steam injection boiler,the system uses shell-and-tube heat exchanger as water vapor steam heat exchanger,the steam through the measurement of the nozzle and control valve into the heat exchanger,the condensate into the deaerator recovery tank,the use of PLC as a controller,touch screen As the man-machine interface,collecting water flow,through the principle of heat balance after heating the water temperature modeling,calculate the required heating steam,the nozzle differential pressure to calculate the steam flow,the PID controller to regulate the steam flow,The temperature is heated to a predetermined value,and the oxygen production rate of the vacuum deaerator is ensured.The system has the application value in the heavy oil extraction industry of the oil field.
引文
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[3]邵拥军,张文林.板式换热器的研究现状与应用进展[J].医药工程设计,2012,(3):58-61.
[4]陈亮.管壳式换热器热工选型计算[J].化学工程与装备,2014,(1):101-104.
[5]高丽梅.蒸汽加热换热器的优化控制[J].石油化工自动化,2015,(4):74-76.
[6]张倩,陈锐.水和水蒸汽性质公式与Excel联合应用[J].化学工程与装备,2015,(2):41-43.
[7]张宝,顾正皓,童小.忠汽轮机调节阀中蒸汽流量的计算[J].发电设备,2012,(11):389-391.
[8]孙飞,张娜,吴少鹏,庄春鑫.基于PLC的模糊PID炉温控制系统设计与开[J].工业控制计算机,2015,(2):50-51.
[9]王鑫民.一体化喷嘴在蒸汽计量中的应用[J].石油化工自动化,2014,(6):61-64.
[10]中华人民共和国国家标准.GB/T2624.3-2006.第三部分:喷嘴和文丘里喷嘴,2007.07.01.
[11]王晗丁.超临界快堆电站系统安全分析程序[D].华北电力大学,2012.
[12]阎秦.太阳能辅助燃煤发电系统热力特性研究[D].华北电力大学(北京),2011.
[13]孟凤果.单片机在太阳能中央热水系统中的应用[D].河北工业大学,2008.
[14]杜增辉,叶晓东.汽液两相流自调节水位控制器的应用[J].发电设备,2002,(03):19-21.
[15]张杰飞.在负荷变化大的工况下的工业燃煤锅炉PI-模糊串级控制[D].昆明理工大学,2001.