Quench chamber is the most important component in the coal gasifier,and is easy to break.In order to find the pattern of turbulent flow and heat transfer of synthetic gas in the Vertical downward pipe,a numerical mode...Quench chamber is the most important component in the coal gasifier,and is easy to break.In order to find the pattern of turbulent flow and heat transfer of synthetic gas in the Vertical downward pipe,a numerical model based on analyzing the flow and heat transfer features of the vertical pipe in quench chamber is first presented.The variations of temperature,velocity of synthetic gas with the change in length and radius of the vertical pipe and the velocity of the gas are obtained,and the effect of radiation is found. The pattern of turbulent flow and heat transfer of synthetic gas in the vertical pipe is further revealed.展开更多
Supersonic extraction process of glycyrrhizia polysaccharide(GPS) was examined by orthogonal experiments . The optimized supersonic extraction process was obtained and mathematical simulation based on the supersonic e...Supersonic extraction process of glycyrrhizia polysaccharide(GPS) was examined by orthogonal experiments . The optimized supersonic extraction process was obtained and mathematical simulation based on the supersonic extraction was established. The optimized condition for extraction of GPS is as follows: supersonic treatment time is 3 5 h, supersonic treatment temperature is 81 ℃, liquid solid ratio is 10 mL/g, number of times of extraction is 1. Under the optimized condition, the extraction rate of GPS is 5 40%, purity is 39 95% and the relative deviation of repeated experiments is 2 54%.展开更多
文摘Quench chamber is the most important component in the coal gasifier,and is easy to break.In order to find the pattern of turbulent flow and heat transfer of synthetic gas in the Vertical downward pipe,a numerical model based on analyzing the flow and heat transfer features of the vertical pipe in quench chamber is first presented.The variations of temperature,velocity of synthetic gas with the change in length and radius of the vertical pipe and the velocity of the gas are obtained,and the effect of radiation is found. The pattern of turbulent flow and heat transfer of synthetic gas in the vertical pipe is further revealed.
文摘Supersonic extraction process of glycyrrhizia polysaccharide(GPS) was examined by orthogonal experiments . The optimized supersonic extraction process was obtained and mathematical simulation based on the supersonic extraction was established. The optimized condition for extraction of GPS is as follows: supersonic treatment time is 3 5 h, supersonic treatment temperature is 81 ℃, liquid solid ratio is 10 mL/g, number of times of extraction is 1. Under the optimized condition, the extraction rate of GPS is 5 40%, purity is 39 95% and the relative deviation of repeated experiments is 2 54%.
