Fhe Third Coke Oven Gas-to-Methanol Unit Put on Stream in Shandong

The 100 kt/a coke oven gas-to-methanol unit at Shandong Tengzhou Shenlong Coking Company designed by the No. 2 Design Institute of Chemical Industry has been successfully put on stream while cranking out high quality methanol. This is the third coke oven gas-to-methanol unit after successful commissioning of a 80 kt/a Yunnan methanol unit in 2004 and an 100 kt/a Hebei methanol unit in 2005. It is said that the design of this third methanol unit has been further optimized on the basis of the previous two units in order to improve the resource utilization rate and the environmental and economic benefits. The Tengzhou Shenlong Coking Company began to construct the coke oven gas-to-methanol unit starting from November 2004 while investing around 400 million RMB in the project. The construction of this unit was completed after two years. The operation of this unit can solve the wasteful usage of resources and environmental pollution related with venting of around 200 million m^3 of coke oven gas a year. Utilization of waste gas will bring about enormous economic benefits.

二段转化炉炉底球冠形刚玉砖拱使用问题分析及预防

焦炉煤气制甲醇装置甲烷转化系统二段转化炉运行过程中,由于高温烘烤、气流冲刷、热震等因素的影响,二段转化炉炉底球冠形刚玉砖拱之刚玉砖的强度会逐渐下降,出现局部裂纹、砖块剥落的现象。结合河北金牛旭阳化工有限公司的实际生产情况,简介刚玉砖拱的作用及结构、刚玉砖拱的使用情况,分析与探讨导致二段转化炉炉底球冠形刚玉砖拱损坏的原因,以及设计、制作与砌筑质量对刚玉砖拱使用寿命的影响,并提出了相应的生产操作注意事项。总之,刚玉砖拱要达到良好的使用效果、延长其使用寿命,首先是刚玉砖拱要设计合理、制作质量优良,其次是生产中要精心操作,保证温度、压力稳定,减少系统开/停车次数和检修频次,减缓刚玉砖拱强度下降的速率。