DRY TREATMENT APPARATUS FOR LOW TEMPERATURE EXHAUST GAS

摘要

PROBLEM TO BE SOLVED: To implement an approximately complete desulfurization in a precedent stage by using a carboneous granular catalyst and effectively and economically implement denitrification and dust removing in a subsequent stage by using cheap manganese ore as a catalyst. SOLUTION: A first stage moving bed reactor 5 packed with a carboneous granular catalyst 5a and a second stage moving bed reactor 21 having a vertically disposed gas-permeating wall structure 22 to form a coarse grained granular manganese ore catalyst moving bed 23a in a precedent side section and a fine grained manganese ore moving bed 23b in a subsequent side section are provided in a midway of an exhaust gas path. In the first stage reactor 5 an approximately complete desulfurization of exhaust gas is carried out by using the carboneous granular catalyst and in the second stage reactor denitrification of NOx is promoted in the fine grained bed and the coarse grained bed by using the cheap manganese ore as a catalyst, and in the fine grained bed a function as a dust filter medium is enhanced so as to effect effective dust removal and prevent dust from being secondarily scattered in an exhaust gas discharging side.