| Atmospheric fine particles is caused by one of the primary factors fog and haze, and seriously affect atmospheric visibility and traffic safety, can reach the alveoli through the respiratory tract, cause serious harm to human health. Since atmospheric fine particles having a small size and light weight characteristic quality, long-term suspended in the atmosphere, the use of atmospheric circulation is transferred to the surrounding distant area, causing a large area of air pollution.Experiment from fly ash and coal gangue, determination of binder kaolin, diatomite and bentonite, pore-forming agent sodium bicarbonate, calcium carbonate and starch in screening suitable raw material, binder and pore former. According to the quality ratio of aggregate: binder: pore forming agent = 6:1:3 carries on the ingredients, grind and become block, 1000 for sintering, holding time 1h. Finally concluded that coal gangue and fly ash as aggregate, pore-forming agent with Ca CO3 and starch, binder selection of kaolin, diatomite and bentonite, calcined samples due to not agglomeration, easy threshing and hardness is not up to standard, are unable to meet the requirements of the experimental results. Fly ash as the aggregate, pore-forming agent selected as Na HCO3, kaolin as binder, the fire sample hardness can meet the experimental requirements, sample surface high out of the hole rate, uniform distribution, size is unified.The use of fly ash as aggregate, kaolin as binder, sodium bicarbonate as pore preparation of fly ash based porous ceramic particle. The use of a porous ceramic grains as an integrated sampling pump air carrier trapping, trapping effect of porous ceramic grains of airborne fine particulate matter. The effects of sintering temperature, holding time, affect the amount of binder and pore dosage of fly ash-based porous ceramic particles capture functions. Through experimental study experimental formulation and process parameters on the porous ceramic grain trap filter out fine particles affect the performance of the process to determine the best route. Research results show that: in the fly ash was 63.33%, kaolin was 5%, Na HCO3 was 31.67%, calcination temperature 950 ℃, holding time of 1 h, under the conditions to obtain a pore size of 5~40μm ash porous ceramic grains, which atmospheric fine particles have better filtering effect of trapping, testing filtering effect can be up to 46%Porous ceramic filter out airborne fine particles on grain test results showed that: different grain size of the porous ceramic filter out the effects of atmospheric fine particles, filter out the effect of the law is to draw a small sample size of 60 to 40 mesh> Mixed particle samples> moderate sample size of 40 to 30 mesh> large sample size of 30 to 20 mesh. Filter out fine particles in the air to test small sample size of 60 to 40 mesh particle size filtered out better than the mixed samples and test hybrid particle filter the PM10 samples than the small sample size of 60 to 40 mesh. Experiments also found that the greater the concentration of PM2.5 and PM10 porous ceramic filter out the larger amount of grain to filter PM2.5 and PM10. Different grain size of the porous ceramic filter out different concentrations of PM2.5 and PM10 by its impact, medium particle size of 40 to 30 mesh particle size and mixed by the great influence of the concentration of the sample, while the large sample size of 30 to 20 mesh and small particle size 60 to 40 mesh sample concentration less affected. |
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