Regeneration operational parameters

Control Devices. Control devices have advanced from manual control to sophisticated computet-assisted operation. Radiation pyrometers in conjunction with thermocouples monitor furnace temperatures at several locations (see Temperature measurement). Batch tilting is usually automatically controlled. Combustion air and fuel are metered and controlled for optimum efficiency. For regeneration-type units, furnace reversal also operates on a timed program. Data acquisition and digital display of operating parameters are part of a supervisory control system. The grouping of display information at the control center is typical of modem furnaces. 

An even larger one-quarter barrel per day circulating unit came very close to simulating both the 200 B/D demonstration unit and later commercial operations. It also possessed a two-stage regenerator and vented riser (both hallmarks of the RCC process). This allowed simulation and evaluation of additional RCC operating parameters. 

To facilitate detailed technical analysis, additional technical data besides normal operating parameters for FFB regeneration will be presented in the following sections. 

The operating parameters influencing the bed density of an FFB regenerator are somewhat different from those of the turbulent bed. In the latter case, bed density changes only with gas velocity and catalyst inventory, while in the former, solid circulation rate exerts a major influence, as shown in Fig. 10. 

MTZ (mass transfer zone). 500. 501 multicomponent data, 503 operating cycles, 502 operating parameters, 502 operating practices, 504 packed beds, 500-504 regeneration, 502, 504 regeneration steam, 502 Adsorption equilibria, 495,497... 

In the design of SMB experiments, one is mostly concerned with the projection of the four-dimensional space, (j=l,...4), onto (m2,) plane, i.e., the plane in the operating parameter space spanned by the flow rate ratios of the two key seetions of the SMB unit. From adsorption isotherm determined previously and the feed eoncentration, complete separation regions for propranolol hydroehloride separation was constructed in the (m2, m3) plane, as shown in Figure 5. It is worth noting that for proper operation of SMB to obtain desired complete separation, adsorbent and fluid should be regenerated in section 1 and 4 respectively. 

The regenerator pressure fell by 28 mbar. This value was within the eontraetually agreed limits. Nevertheless, two further tests were performed with modified parameters. Five hours after beginning the optimization proeess, a test was performed in whieh the regenerator pressure dropped by just 8 mbar. This value is within the normal operating spread of the regenerator output pressure. 

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