Development and Field Installation of a System of Simultaneously Removing Dust and Volatile Organic Compounds from Furan Process in Foundry

摘要

A foundry makes various machinery parts made by iron.For manufacturing machinery parts,they usually uses wooden mold with molding sand and pour the molten iron into wooden mold through inlet.A foundry have many processes including Furan process,In Furan process workers prepares a wooden mold in the molding sand.So they fixes wooden mold in sand housing and then they fill the molding sand in the sand housing.Molding sand should be sticky enough to sustain the shape of wooden mold,so several materials are needed to prepare the suitable molding sand.The first step of Furan process is making the molding sand with molding sand and Voltaic Organic Compounds (VOC) and the second step of Furan process is pour the molding sand into the wooden molding housing.This two step of process generated noxious VOC and various size of dust.So the process is very dirty and dangerous one.Because of these,Workers frequently shrink out of the plant.The company related with foundry usually faced on the difficult situation for engagement and always have shortage of hiring problem.Through this study,we developed a system which removes toxic VOC and dust simultaneously.We design and construct real system and install it at real plant.Before setting up this system,the working surroundings VOC (for formaldehyde) 15 ppm and Dust(for PM_(10)) 8,000 mu g/m~3.After setting up this system,working surroundings is improved by VOC (for formaldehyde) 0 ppm,Dust(for PM_(10)) 4 mu g/m~3,and the work evasion factor is removed.So we contribute to solve hiring problem of this company and increasing the productivity also.