Product discharge value

Product classification is generally realised by product discharge through an elutrlation leg which also serves as a washing step to remove contaminated mother liquor. The stable operation of such an elutrlation leg is difficult and the separation efficiency is unsatisfactory. Previous results ) show that values of both the average size and the coefficient of variation in the product stream delivered from the elutrlation leg differed only slightly from those in the circulation mains in a forced circulation pilot plant crystalllser, as illustrated in Table 1. 

A globe valve (which has a typically high pressure drop) mounted under an SRV can in fact only be suitable for liquid thermal relief due to the very low lift of the SRV and the very small amount of product discharged per relief cycle. Other valves may be used under a PRV as long as they are full bore and can be locked open. In Figure 6.2, some L/D values are given for some traditional valve inlet configurations. 

The Nernst equation helps us understand why the emf of a voltaic cell drops as the cell discharges. As reactants are converted to products, the value of Q increases, so the value of E decreases, eventually reaching E = 0. Because AG = —nEE (Equation 20.11), it follows that AG = 0 when E = 0. Recall that a system is at equilibrium when AG = 0. = (Section 19.7) Thus, when E = 0, the cell reaction has reached... 

Prior to the steady-state phase of the production usually the bed has to be filled to a certain level, that is, mainly depending on the design of the equipment and the pressure drop over the bed. The constancy of the bed height can also be ensured via the pressure drop. Therefore, this value is important for the control of the powder feed and product discharge. 

Because of the formation of nitrogen oxides, a steady-state ozone concentration cannot be obtained instead, due to the buHdup of nitrogen oxides, an increase in residence time in the discharge results in a decrease in ozone concentration beyond the maximum value. Thus, there is an optimum residence time for maximum ozone production. 

In order to establish safe values for velocity-diameter product, various studies have been made to determine the minimum liquid surface potential that will result in an incendive discharge in the presence of a grounded electrode. Studies reviewed in [8] showed that for credible charging conditions, liquids must be negatively charged to yield incendive bmsh discharges. The consensus has been that to avoid incendive discharges the maximum liquid... 

The power required for pumping will be given by the product of the volumetric flowrate and the pressure difference between the pump outlet and the discharge end of the pipeline. Taking note of the fluctuating nature of the flow, it is necessary to consider the energy transferred to the fluid over a small time interval and to integrate over the cycle to obtain the mean value of the power. 

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