Harmless treatment of CaS from coal gas desusulfurization and other industries is of very importance for the environmental protection. In this paper, the experimental investigation of calcium sulfide regeneration with...Harmless treatment of CaS from coal gas desusulfurization and other industries is of very importance for the environmental protection. In this paper, the experimental investigation of calcium sulfide regeneration with steam at atmospheric pressure was carried out using TGA, fixed bed reactor and SEM-EDX analysis. The results show that the reaction mechanism of CaS with steam varies with temperature. The reaction occurs obviously at the temperature above 630°C and the dominant products include CaSO4 (or CaSO3) and H2S, as the temperature is over 850°C, the primary products become CaO, SO2 and H2S. The CaS regeneration reaction will strongly depend on the temperature and the data over 900 °C can be fitted by the Shrinking-Core Model (SCM).展开更多
In order to lighten the burden of health care workers and help people with Lower limb insufficiency to do rehabilitation training, this paper designs a model named exoskeletons rehabilitation robot to simulate the hum...In order to lighten the burden of health care workers and help people with Lower limb insufficiency to do rehabilitation training, this paper designs a model named exoskeletons rehabilitation robot to simulate the human gait, including exoskeletons and scooter structure, and designs the driver module. Finally, this paper uses Workbench software to do the stress and strain analysis, which validates the reliability of the whole design.展开更多
文摘为探究不同施磷量对滴灌紫花苜蓿根际土壤微环境及干草产量的影响,试验设置4个施磷(P_(2)O_(5))梯度:0(P_(0)),50(P_(1)),100(P_(2))和150 kg·hm^(-2)(P_(3)),采用滴灌模式随水滴施,测定紫花苜蓿根际土壤微生物数量、酶活性、土壤理化性质及干草产量,并进行综合分析。结果表明,紫花苜蓿根际土壤真菌、放线菌数量及脲酶、过氧化氢酶活性在P_(2)处理下达到最大值,分别为6.04,6.15 lg cfu·g^(-1)及933.54,945.91 U·g^(-1)·d^(-1);细菌数量在P_(3)处理达到最大值,为7.14 lg cfu·g^(-1);碱性磷酸酶活性在P_(1)处理达到最大值,为14939.80 U·g^(-1)·d^(-1)。根际土壤全磷及有效磷含量随着施磷量的增加呈逐渐增加的趋势,至P_(3)处理达到最大值,但根际土壤pH及含水率均为未施磷显著高于其他处理(P<0.05)。苜蓿干草产量在P_(2)处理达到最大值,为21.82 t·hm^(-2)。综合评定,适宜的施磷量(100 kg·hm^(-2))有利于改善紫花苜蓿根际土壤微环境,进而提高苜蓿干草产量。
基金Project 2002AA529080 supported by National High-Tech Research and Development Program of China (Progam 863)
文摘Harmless treatment of CaS from coal gas desusulfurization and other industries is of very importance for the environmental protection. In this paper, the experimental investigation of calcium sulfide regeneration with steam at atmospheric pressure was carried out using TGA, fixed bed reactor and SEM-EDX analysis. The results show that the reaction mechanism of CaS with steam varies with temperature. The reaction occurs obviously at the temperature above 630°C and the dominant products include CaSO4 (or CaSO3) and H2S, as the temperature is over 850°C, the primary products become CaO, SO2 and H2S. The CaS regeneration reaction will strongly depend on the temperature and the data over 900 °C can be fitted by the Shrinking-Core Model (SCM).
基金Supported by Science and Technology Department of Anhui Province Qiushi Plan(JZ2015QSJH0245)National College Students’Entrepreneurship Practice Project(201410359070)
文摘In order to lighten the burden of health care workers and help people with Lower limb insufficiency to do rehabilitation training, this paper designs a model named exoskeletons rehabilitation robot to simulate the human gait, including exoskeletons and scooter structure, and designs the driver module. Finally, this paper uses Workbench software to do the stress and strain analysis, which validates the reliability of the whole design.
