Method for heating up or keeping warm the flow paths of a process plant
OwnerEberhard Kuske, Johannes Menzelinventors
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Abstract
The invention relates to a method for heating up or keeping warm the flow paths of a process plant, wherein a stream of fluid provided for heating up or keeping warm the flow paths is guided in a circuit which comprises a heating device (8) for warming up the stream of fluid. According to the invention, to equalize the pressure loss occurring in the circuit, the stream of fluid is supplied as a suction medium to a jet pump (5) arranged in the circuit and is exposed there to a pumping medium supplied at a higher pressure.
Claims17
A method of heating or keeping warm the flow passages of a process plant for the catalytic conversion of constituents of a process fluid outside the process operation during which the process fluid flows into the plant and there is subjected to a chemical or physical treatment or conversion, a fluid flow provided instead of the process fluid outside the process operation for heating or keeping warm the flow passages being guided in a closed loop containing a heater for warming up the fluid flow, wherein to compensate for the pressure loss occurring in the closed loop the fluid flow is fed as an inlet fluid to a jet pump in the closed loop and there is acted on with a motive fluid fed at a higher pressure.
(canceled)
A method of operating a process plant for the catalytic conversion of constituents of a process fluid where during normal operation of the plant the process fluid is fed into the plant, then passed through flow passages and flowed in a treatment stage over a bulk catalyst, and thereafter fed out of the plant, the method comprising, for heating or keeping warm the flow passages outside of normal operation, the steps of:
- providing a recovery line forming with the flow passages a closed loop passing through the treatment stage, through a heater, and from an inlet to an outlet of a jet pump having a motive-fluid nozzle;
- and
- supplying a motive fluid under higher pressure than the process fluid in the closed loop to the nozzle so as to circulate the process fluid through the closed loop such that heat picked up from the heater is transferred to the flow passages and bulk material in the treatment stage.
Dependencies are inferred from the claim text.