Specifically, the present control technique is particularly directed toward control of the temperature increase experienced through an exothermic, catalytic reaction zone in which endothermic reactions are also taking place. In many such processes, the reactions being effected are both exothermic and endothermic, with the former generally predominating.
Principally exothermic processes include hydrodesulfurization, hydrodenitrification, dealkylation, hydrotreating (olefin saturation), hydrocracking, etc., all of which have been previously categorized as hydroprocesses. a combination of hydrotreating followed by catalytic reforming. The latter are prevalent in a multitude of hydrocarbon conversion processes widely utilized throughout the petroleum industry, and are often integrated in combination with an endothermic reaction process - e.g. dehydrogenation of naphthenes to aromatic hydrocarbons - are endothermic in nature, hydrogen-consuming reactions are primarily exothermic. Whereas hydrogen-producing reactions - e.g. Therefore, the present invention essentially involves a method for controlling the temperature rise through a catalytic reaction zone in which exothermic reactions predominate. My inventive concept, as herein more fully described, encompasses a technique for preventing and alleviating so-called temperature run-away prevalent in catalytic hydrocarbon conversion processes in which the reactions effected are both exothermic and endothermic. Enhanced control is afforded by selecting the higher of the intermediate and outlet temperatures, developing another representative signal and adjusting the signal being transmitted to the charge stock bypass regulating means. The signal is transmitted to the inlet temperature recorder controller to adjust the set point thereof, and the quantity of charge stock bypassing the feed heater is further regulated responsive thereto. The difference between the inlet and intermediate temperatures, and that between the intermediate and outlet temperatures are determined to produce two delta-T signals which are transmitted to a double differential temperature recorder controller (DdTRC) which develops a signal representing the difference between the two delta-T signals, compared to a preset difference.
The inlet temperature sensor co-acts with a temperature recorder controller (TRC) having an adjustable set point, to produce a representative signal which is transmitted to flow-regulating means which adjusts the quantity of charge stock bypassing the feed heater.
#Temperature recorder controller trc portable
New Features Calibration Certificate Included Bench-Top Design with Tilt Handle Standard Illuminated Power Switch Companion hot pointTM Dry Block Probe Calibrator Available (Model CL900A/950A) New Stylish Design Portable Rugged Case for Use in the Factory, Calibration Laboratory, or Instrument Department Built-in Temperature Readout with 0.Control of temperature increase (delta-T) through a reaction zone, in which both exothermic and endothermic reactions are effected, is achieved by sensing the inlet temperature of the charge stock, an intermediate temperature within the reaction zone and the outlet temperature of the effluent from the reaction zone. OMEGACARESM covers parts, labour and equivalent loaners.
#Temperature recorder controller trc full
Ask your sales representative for full details when placing an order. OMEGACARESM extended warranty programme is available for models shown on this page. The alternate freezing and thawing of the ice accurately maintains a 0☌ environment around the reference wells. The increase in volume produced by the creation of ice crystals within the cell is sensed by the expansion of a bellows, which operates a microswitch and Probes sold separately please see page 275 TRCIII-A, £990, shown smaller than actual size. The outer walls of the chamber are cooled by thermoelectric cooling elements.
Each well extends into a sealed cylindrical chamber containing the distilled deionised water. The TRCIII-A ice pointTM Reference Chamber relies on the equilibrium of ice and distilled, deionised water at atmospheric pressure to maintain 6 reference wells at precisely 0☌. 268 TRCIII-A £990 All Models ice point™ Calibration Reference Chamber High Precision Thermoelectric Chamber Uses Water to Maintain 0☌ Continuously The ice pointTM TRCIII-A Calibration Reference Chamber is the latest addition to OMEGA’s fine range of calibration reference instrumentation.
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