The Application of Air Purification Technology base on Dry Dust Removal in Long Tunnel Construction

Abstract

In order to solve the prominent problems of long distance ventilation, such as large energy consumption, high cost, poor ventilation effect and poor air quality in the tunnel, the mechanism of dry dust-removal technology is analyzed and the technology and performance of a dry dust-removing machine are discussed in this paper based on research of state-of-the-art dust-removal technologies at home and abroad. The results show that the dry dusting machine being installed in the dust concentration site which is around 30m away from the Tunnel face is effective to the centralized dedusting on the procedures of blasting and sprayed concrete. The results showed that Additional ventilation system can discharge the harmful gas like CO. Meanwhile, the duster, after 2-min operation, resulted in the reduction of dust concentration from 75mg/m3 to 3mg/m3. Therefore, the combination of dry duster and jet fan ventilation can succeed in solving the excessive concentration of dust under tunnel construction.