| The environment problem brought by Municipal Solid Waste(MSW) has attracted generally attention all over the world, so the effective and sound treatment was an important part in the field of environment protection. The non-disposal or improper disposal of MSW caused serious problems, such as trenching on infield, contaminateding water source, disfeaturing nature scenery, even endangering people' s life and properties. At present, there were three main mature methods in the disposal MSW: landfill, compost and incineration. The incineration was a quick and effective method, through which could kill germina completely, recovery energy and reduce the volume of MSW obviously. The method was becoming a main approach of disposal MSW in domestic and abroad. The effective controlling of combustion conditions and secondary pollution was the key to MSW incineration. There was serious secondary pollution during incineration. The secondary pollution including fly ash, heavy metals, HC1, SOx, NOx, HF, CO, bottom ash, dioxins and others poisonous organic pollutant. Some pollutants with deadly toxicity and complex form, such as HC1, heavy metals and dioxins were very harmful to peopel health and environment. It is very nessary to research formation and control mechanism of these harmful pollutants during the MSW incineration.In this thesis, the behaviors of sulfur and chlorin and their influence factorswere discussed. The major reseach results are as fellows:1. The component of experiment sample: 50.29% kitchen waste, 14.17% waste paper, 0.61% rubber and plastic, 1.16% fiber, 0.92% metal, 0.8% glass, 32.05% grass and others. There are 0. 54% S in the sample.(1) The behaviors of sulfur in MSW were influenced obviously by incineration temperature) the conversion ratio of S02 increased with the temperature, the ratio aroud 60. 32 % in 600癈and 83% in 1000 C; The max concetration of S02 got at 5 minute, most S02 emission within the 10 minutes; After 25 minutes there were almost not SO2 emission(2) The S02 emission quantity were decreased obviously by dashing CaCO3 with MSWduring incineration , consequently the secondary pollution declined; The best sulfur fixation temperature of CaC03 were 700 C~900 C, the max of sulfur fixation ratio was 88% .(3) The co-combustion of municipal solid waste (MSW) and coal could ensure stable combustion; The concetration of SO2 increased with the co-combustion ratio; The concetration of S02 increased with the temperature.2. We increased the ratio of plastic and rubber in waste to study the chlorin behavior during incineration, the sample EDS: Cy67. 09%, Oy22. 03%, SyO. 29%, Cly4. 18%, and others 6. 41%.(1) The conversion ratio of HC1 ( Hcl) humdrum and slow increase from 80% (600 C ) to 89% (1000 C) with the temperature get high; The trendline was steep correspondingly from 600C~700C.(2) The air volume influenced on the conversion ratio of HC1 ( HCl) ; In 600 C, HCl increased rapidly from 74%( a =1) to 89% ( a =1. 5), but HCl decreased slowly when a >1.5, HCl was 84% when a =3. (3) The chlorin was solidfied obviously in the slag when dashing CaCO3, with MSW during incineration, the chlorin fixation ratio increased with Ca/(S+0. 5C1) added; When Ca/(S+0. 5C1) =2. 5, the chlorin fixation was 82. 23%, this ratio of Ca/(S+0. 5C1) can settle for perfect purpose of chlorin fixation; When CaCO?supplied continued, the ues factor of CaC03 decreased; Ca/(S+0. 5Cl)=2. 5 better than others based on the chlorin ratio and the ues of factor of CaCO3.(4)The chlorin fixation of CaC03 was inflenced by temperature, the reaction of chlorin fixation was disadvantagous with the temperature; hen Ca/(S+0. 5C1) =2. 5, the chlorin fixation decreased from 80. 97% to 11. 24% with the temperature increased from 600 C to 1000 C. |
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