转炉煤气除尘技术比较和新干法除尘技术探析

摘要

转炉煤气是高温高含尘烟气，不论湿法除尘还是干法除尘都要对其直接喷水降温，消耗大量冷却水，同时转炉煤气900℃以下显热能也白白浪费。介绍了现有转炉煤气除尘技术，包括湿法、干法以及半干法除尘技术，比较各自能量消耗。提出转炉煤气新干法除尘技术，该技术能显著减少系统冷却水消耗，并提高系统蒸汽回收量。%Converter gas is a flue gas with high dust content and high temperature, which is cooled by direct water spray no matter using wet or dry dust removal methods and consumes large amount of cooling water while the sensible heat of the converter gas under 900 ℃ is wasted. The existing converter gas dust removal techniques, including wet, dry and semi-dry dust removal methods, are introduced and their energy consumption performances are compared. A new dry dust removal technology for converter gas is put forward, which can significantly reduce cooling water consumption and increase steam recovery rate.