In order to improve the utilization rate of foam,an arc jet nozzle was designed for precise dust control.Through theoretical analysis,the different demands of foam were compared amongst arc jets,flat jets and full con...In order to improve the utilization rate of foam,an arc jet nozzle was designed for precise dust control.Through theoretical analysis,the different demands of foam were compared amongst arc jets,flat jets and full cone jets when the dust source was covered identically by foam.It is proved that foam consumption was least when an arc jet was used.Foam production capability of an arc jet nozzle under different conditions was investigated through experiments.The results show that with the gas liquid ratio(GLR)increasing,the spray state of an arc jet nozzle presents successively water jet,foam jet and mist.Under a reasonable working condition range of foam production and a fixed GLR,foam production quantity increases at first,and then decreases with the increase of liquid supply quantity.When the inner diameter of the nozzle is 14 mm,the best GLR is 30 and the optimum liquid supply quantity is0.375 m^3/h.The results of field experiments show that the total dust and respirable dust suppression efficiency of arc jet nozzles is 85.8%and 82.6%respectively,which are 1.39 and 1.37 times higher than the full cone nozzles and 1.20 and 1.19 times higher than the fiat nozzles.展开更多
This work is devoted to developing of the ecologically safe technology of chickpea cultivation by using microbial biopreparations, based on the effective heterotrophic （nodulating, growth-promoting and phosphate mobi...This work is devoted to developing of the ecologically safe technology of chickpea cultivation by using microbial biopreparations, based on the effective heterotrophic （nodulating, growth-promoting and phosphate mobilizing bacteria, and microorganisms-antagonists of the phytopathogenes） and phototrophic microorganisms （cyanobacteria）. These preparations were used for pre-sowing treatment of seeds and for treatment of the plants in the vegetation period for optimization of symbiotic nitrogen fixation and growing of ecologically safe production （without application of mineral fertilizers） in the steppe non-irrigated areas of Ukraine.展开更多
基金supported by the National Natural Science Foundation of China(No.51474216)
文摘In order to improve the utilization rate of foam,an arc jet nozzle was designed for precise dust control.Through theoretical analysis,the different demands of foam were compared amongst arc jets,flat jets and full cone jets when the dust source was covered identically by foam.It is proved that foam consumption was least when an arc jet was used.Foam production capability of an arc jet nozzle under different conditions was investigated through experiments.The results show that with the gas liquid ratio(GLR)increasing,the spray state of an arc jet nozzle presents successively water jet,foam jet and mist.Under a reasonable working condition range of foam production and a fixed GLR,foam production quantity increases at first,and then decreases with the increase of liquid supply quantity.When the inner diameter of the nozzle is 14 mm,the best GLR is 30 and the optimum liquid supply quantity is0.375 m^3/h.The results of field experiments show that the total dust and respirable dust suppression efficiency of arc jet nozzles is 85.8%and 82.6%respectively,which are 1.39 and 1.37 times higher than the full cone nozzles and 1.20 and 1.19 times higher than the fiat nozzles.
文摘This work is devoted to developing of the ecologically safe technology of chickpea cultivation by using microbial biopreparations, based on the effective heterotrophic （nodulating, growth-promoting and phosphate mobilizing bacteria, and microorganisms-antagonists of the phytopathogenes） and phototrophic microorganisms （cyanobacteria）. These preparations were used for pre-sowing treatment of seeds and for treatment of the plants in the vegetation period for optimization of symbiotic nitrogen fixation and growing of ecologically safe production （without application of mineral fertilizers） in the steppe non-irrigated areas of Ukraine.
