摘要
板式空气预热器在实际应用过程中由于各装置不同的情况产生了不同的问题。板式空气预热器在制氢转化炉低温段的应用过程中发生烟气侧堵塞,烟气侧前后压力差达到2.4 kPa,导致炉膛负压不足,转化炉负荷被迫降至50%,后因堵塞情况加剧,被迫停工拆卸空气预热器清洗。在2011年出现了烟气侧出口板片腐蚀穿孔,导致鼓风机空气短路,热风道风压力下降到0.38 kPa,只能满足60%转化炉负荷需要。就烟气侧堵塞和烟气侧板片腐蚀穿孔等实际问题进行了原因分析,并提出了在转化炉鼓风机出口设置前置预热器;改变低温空气预热器烟气出口型式;在低温空气预热器烟气出口板片增加热电偶测温点的数量等改进措施。
The different problems always occur in plate air preheaters in the process units of different operating conditions. In SINOPEC Luoyang Company, the flue gas side of plate air preheater in the low-temperature section of reforming furnace of hydrogen generation plant was blocked, and the pressure difference before and after the flue gas side had reached 2.4 kPa which caused insufficient negative pressure in the furnace chamber. The duty of the reforming furnace had to be reduced by 50% , and finally the air preheater had to be shutdown for cleaning because of serious blocking. In 2011, the outlet plate of flue gas side of the preheater failed from corrosion, causing the air flowing directly into the flue gas side and the pressure of the hot blast decreased to 0.38 kPa, which could only meet 60% of the convection furnace demand. The causes of blocking at flue gas side and corrosion failure of the outlet plates are analyzed. The improvement measures for design of preheater, flue gas outlet of low-temperature air preheater and design of thermocouple for outlet plate of the preheater are presented,
出处
《炼油技术与工程》
CAS
2012年第11期44-46,共3页
Petroleum Refinery Engineering
关键词
制氢转化炉
低温段
板式空气预热器
改进措施
reforming furnace for hydrogen generation, low-temperature section, air preheater, improvement measures
