On some conditions, de-dust efficiency is up to92%, by installing water scrubber to remore dust from blow-run gas, The blow-run gas after treatment could meet national emission standard. 对煤气发生炉的吹风气增设反击式旋风水膜除尘器,在一定的条件下,吹风气中烟尘去除率可达92%以上,治理后的吹风气达到国家排放标准。