The structural optimization of gas-solid baffles on the cross-flow moving bed

Abstract

In the cross-flow moving bed, the gas-solid cross-flow pattern facilitates its high gas process capacity under relatively low pressure drop. In this paper, a structural optimization of gas-solid baffles, is proposed to enhance the bed operating flexibility by controlling the abnormal phenomena of cavity, pinning and air lock. According to experimental data, the relevant equations for predicting the occurrence of the abnormal phenomena are derived to explain the effects of the gas-solid baffles. It turns out that, with this proposed optimization, the cavity and pinning are weakened in both rectangular and radial beds; the air lock can be easily controlled by increasing the height and diameter of feed tube. The preferred gas-solid baffles is in the middle position (x/L=0.5) of the rectangular bed and/or (r-r1)/(r2-r1)<0.5 of the radial bed under different gas superficial velocities, particle diameters and bed voidages.

A B/S-Based Multi-Server Framework for Knowledge Component Implementation

“…Database server is used to store the component information (including input, template and output) and the runtime data produced during the executing process. The whole process that an individual knowledge component runs in this framework is listed as follows: (1) The web browser sends a HTTP request to the component engine; (2) The component engine reads the component ID form the database and starts a task thread; (3) The component engine write the new-started thread information to the database and set its state to "on"; (4) The component engine sends a message which includes the input parameters and template file of the knowledge component to the solver server, and start a related software tool, then waits until the software process is finished; (5) The solver server sends a message which includes the state of the solver service (available or not) and a result file to the application server; (6) The component engine write the result file to the database and set the state of the new-started thread to "off"; (7) The component engine send the result file to the web browser as a response.…”