化肥设计
化肥設計
화비설계
CHEMICAL FERTILIZER DESIGN
2013年
5期
43-45,48
,共4页
赵飞%冯德音%姚青伟
趙飛%馮德音%姚青偉
조비%풍덕음%요청위
尿素%精馏塔/循环加热器,换热效率%结垢%清洗
尿素%精餾塔/循環加熱器,換熱效率%結垢%清洗
뇨소%정류탑/순배가열기,환열효솔%결구%청세
urea%rectifying tower /circular heater,heat transfer rate%fouling%washing
介绍了二氧化碳汽提法尿素装置低压分解系统的工艺流程和精馏塔/循环加热器的结构特点；从工艺操作和设备等方面分析了精馏塔/循环加热器换热效率差的原因。结果表明：循环加热器列管结垢是造成精馏塔/循环加热器换热效率差的主要原因。通过采取相应的在线处理措施以及化学清洗和机械清理的方法，有效解决了循环加热器列管结垢的问题，满足了装置的运行要求。
介紹瞭二氧化碳汽提法尿素裝置低壓分解繫統的工藝流程和精餾塔/循環加熱器的結構特點；從工藝操作和設備等方麵分析瞭精餾塔/循環加熱器換熱效率差的原因。結果錶明：循環加熱器列管結垢是造成精餾塔/循環加熱器換熱效率差的主要原因。通過採取相應的在線處理措施以及化學清洗和機械清理的方法，有效解決瞭循環加熱器列管結垢的問題，滿足瞭裝置的運行要求。
개소료이양화탄기제법뇨소장치저압분해계통적공예류정화정류탑/순배가열기적결구특점；종공예조작화설비등방면분석료정류탑/순배가열기환열효솔차적원인。결과표명：순배가열기렬관결구시조성정류탑/순배가열기환열효솔차적주요원인。통과채취상응적재선처리조시이급화학청세화궤계청리적방법，유효해결료순배가열기렬관결구적문제，만족료장치적운행요구。
Author has introduced the process flow of low pressure decomposition system in urea plant by carbon dioxide stripping and the structural features of rectifying tower /circular heater; has analyzed the reason of the poor heat transfer rate for rectifying tower and circular heater from aspects of process operation and equipment etc.Result indicates that the fouling for tubes of circular heater is the main reason causing poor heat transfer rate for rec -tifying tower /circular heater, the fouling problem is solved effectively for the tubes of circular heater by means of adopting appropriate online disposal measures as well as the chemically washing method and mechanically cleanimg method, it can meet the running requirement of the plant.
