摘要
合成氨生产中常采用碳丙或热钾碱脱除合成气中的二氧化碳 ,它们的共性是塔内液体流率都比较大 ,气液流动参数都高达 2以上 ,都属于加压下的高液气比操作。对于板式塔 ,在扩能改造中往往是塔板的降液管成为瓶颈 ,易发生降液管液泛现象。DJ塔板具有多根矩形降液管 ,溢流周边比常规塔板长 2～ 5倍 ,可通过更大的液量 。
In ammonia production the propylene carbonate or hot potassium carbonate process is usually used to remove CO 2 from syngas. The similarity of the two processes is that the liquid flowrate in the tower is high, the gas liquid flow coefficient is above 2, and the two processes operate at high liquid gas ratio under pressure. For the plate tower, in revamp for capacity increase the downpipe of the plates generally becomes the bottleneck, and flooding of the downpipe is liable to occur. The DJ type plates have several rectangular downpipes attached, the overflow periphery is 3～6 times longer than that of conventional plates, so larger liquid volumes may pass through, and they have been used successfully in the design of the CO 2 removing tower for capacity increase.
出处
《化肥工业》
CAS
2002年第3期10-12,20,共4页
Chemical Fertilizer Industry
