Study On The Transfer Characteristic Of Heavy Metals During Rubber Of MSW Incineration

With the increasing number of urban population and improvement of people’s livingstandards, the yield of Municipal Solid Waste (MSW), the proportion of organic componentsand the calorific value are also increasing. It can be seen from the composition changes ofMSW that rubber and plastic weight ratio of MSW in coastal areas have been increasing to8%to10%, the volume ratio of30%or more. How to achieve the volume reduction, harmlessnessand resource-oriented has become a worldwide research project.Compared with other recyclable waste technology, the incineration process can is notonly simple, but aslo can reduce90%volume and70%weight etc, thus it becomes themainstream of processing the MSW. With the social development and people’s higherenvironmental requirements, this needs higher requirements for waste incineration to dealwith MSW, thus the burning efficiency and possible secondary pollution problems, especiallyheavy metals, are also in the more stringent constraints.The basic characteristics and forms of several heavy metals (Cadmium, Lead, Chromium,Mercury and Arsenic) are comprehensive analyzed, and the different forms of environmentaltoxicological characteristics are compared from the source of the rubber production process tosum up the type, form, toxicity of heavy metals in rubbers. It is obtained that the curing agents,colorants, preservatives contain heavy metals in rubber composition of various additives, andthe arsenide is different from the lead and mercury, the inorganic arsenide is high toxic thanthe organic arsenic.This thesis summarizes the theoretical and applied research of the current situation ofmigration and distribution of heavy metals in MSW incineration process, starting fromone-component rubber waste incineration and using a laboratory tubular furnace to researchthe impact of incineration temperature, the organic chlorine and inorganic chlorine ondistribution characteristics of typical heavy metal pollutants (Cd, Pb, Zn and Cu). The resultsindicate that with the increase of combustion temperature and the addition of chlorine in therubber, heavy metals and their compounds is easier to distribute in fly ash or flue gas, and theburning temperature has obvious impact on the heavy metals with low evaporation pressure(Cd). Furthermore, the chlorine is good for volatile of heavy metals in the rubber andinorganic chlorine can affect more on on distribution characteristics of typical heavy metal.