Numerical Simulation In The Drum Of HS100 Centrifuge Using CFD Method And Improved Design

With the shortage of energy sources becoming severe in our country, production of soda from ammonia-soda is seriously troubled by the energy consumption in the production process. When the water content in sodium bicarbonate is reduced by 1%, 50kg of 3 kgf/cm2 saturated medium pressure steam can be economized, and at the same time, throughput in the calcining procedure can be increased by 5% to 8%, that is to say, the economic benefit is quite good. These days,the domestic soda manufacturers use the foreign centrifuges or the imitation ones to make the secondary separation of soda. Because the foreign centrifuge manufacturers are not familiar with the characteristics of the soda we use, there are many impractical parts in their centrifuges. To resolve this problem, with the help of the computer simulation, the author set about a study on the drive part-the most important part of a centrifuge, and then used the software of CFD to analyze the feed in the drum of the pusher centrifuge. According to the analysis, the drum was then redesigned to meet the production standard.The main research of this paper is:1. The virtual assembly and computer simulation of the drive part, which were done by the author, provided the foundation for the development of new production. By demonstrating some complicated process in the computer, it also helped to train workers, because the demonstration made it easy for the workers to understand.2. Through the numerical computation of the feed in the drum of the centrifuge, the author got its dynamic pressure and static pressure on the wall of the drum, as well as its locus and velocity in the drum, which provided theoretical foundation for redesign.3. Basing on the above-mentioned work, the author checked the structure parameter of the drum, improved the impractical parts, and then tested the redesigned drum on the pusher centrifuge introduced from abroad. It indicated that the output of sodium bicarbonate from the redesigned drum was raised by 27%, meeting the quality standard.