Temperature control for a reactor
AssigneePhillips Petroleum Company
InventorDonald J. Makovec
Life of this patent
Estimating the term…
Abstract
Control of the temperature rise across a reactor where a portion of the product stream flowing from the reactor is recycled and mixed with the feed flowing to the reactor is accomplished by controlling the flow rate of the recycle stream to thus control the concentration of the reactants flowing to the reactor in such a manner that a desired temperature differential across the reactor is obtained. The inlet temperature to the reactor is controlled by manipulating the temperature of the recycle stream to thus maintain the inlet temperature to the reactor at some desired temperature. Ratio control is utilized to maintain a desired ratio of reactants flowing to the reactor if more than one reactant is flowing to the reactor.
Claims9
Apparatus comprising:
- a reactor;
- means for supplying a first feed stream containing a first reactant to the feed inlet of said reactor;
- means for withdrawing the reaction product from said reactor;
- means for passing a portion of said reaction product as a recycle stream to the feed inlet of said reactor;
- means for establishing a first signal representative of the flow rate of said first feed stream;
- means, responsive to said first signal, for establishing a second signal representative of the flow rate of the recycle stream required to substantially maintain a desired temperature differential across said reactor;
- means for establishing a third signal representative of the actual flow rate of said recycle stream;
- means for comparing said second signal and said third signal and for establishing a fourth signal responsive to the difference between said second signal and said third signal;
- and
- means for manipulating the flow rate of said recycle stream in response to said fourth signal to thereby maintain a desired temperature differential across said reactor.
A method for controlling the temperature differential across a reaction zone, where a portion of the product stream flowing from said reaction zone is passed as a recycle stream and mixed with the feed stream flowing to said reaction zone before said feed stream is introduced into said reaction zone, wherein said feed stream contains a first reactant, said method comprising the steps of:
- establishing a first signal representative of the flow rate of said feed stream before said feed stream is mixed with said recycle stream;
- establishing a second signal representative of the flow rate of said recycle stream required to substantially maintain a desired temperature differential across said reaction zone in response to said first signal;
- establishing a third signal representative of the actual flow rate of said recycle stream;
- comparing said second signal and said third signal and establishing a fourth signal responsive to the difference between said second signal and said third signal;
- and
- manipulating the flow rate of said recycle stream in response to said fourth signal to thereby maintain a desired temperature differential across said reaction zone.
A method for controlling the temperature differential across a reaction zone where a portion of the product stream flowing from said reaction zone is passed as a recycle stream and mixed with the reaction zone feed stream, which is formed from at least a first feed stream containing a first reactant and a second feed stream containing a second reactant, before said reaction zone feed stream is introduced into said reaction zone, said method comprising the steps of:
- establishing a first signal representative of the flow rate of said first feed stream;
- establishing a second signal representative of the flow rate of said recycle stream required to substantially maintain a desired temperature differential across said reaction zone in response to said first signal;
- establishing a third signal representative of the actual flow rate of said recycle stream;
- comparing said second signal and said third signal and establishing a fourth signal responsive to the difference between said second signal and said third signal;
- and
- manipulating the flow rate of said recycle stream in response to said fourth signal to thereby maintain a desired temperature differential across said reaction zone.
Dependencies are inferred from the claim text.