Discussion on Emission and Purification of Exhaust Gas after Port Fumigation
The main fumigants adopted in ports include phosphine,methyl bromide and sulfuryl fluoride.The residual fumigants are directly discharged into the atmosphere,which has serious influence on local people and environment.At present,a few standards cover the emission and purification techniques of fumigants in China,which cannot effectively guide the purification treatment of fumigants.Based on the analysis and research of the emission standards of fumigants in China and abroad,the standard for the emission concentration of various fumigants are proposed.The purification techniques mainly include adhering,absorption,burning,condensation,biodegradation and plasma method.the residual fumigants in ports are characterized with low concentration and small emission volume.In the case,The above adhering method can be used to treat the residual phosphine and methyl bromide,and the alkali absorption method applies to sulfuryl fluoride.
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