Temperature control loop design

Pre-

reaction of epoxy resin to meet the requirements under Art, design pre-reactor temperature control loop.
    To
the reactor using two co-accused of the variable temperature adjustment
bamboo to achieve single-loop, in which the manipulation of variables
TICH111 steam valve TV111C the opening tune, the latest of several
characteristics of the valve connection, they TCV111F, TCV111C, TCV111E
and trap together make up the heating circuit in Figure 1 with the
thick solid line;
TICL111 the cold water control valve manipulated
variable TV111CL the opening, they TCV111G, TCV111G together make up the
cooling circuit, in Figure 1 with thin solid line. In
the heating stage, the heating back on the road to open the valve to
maintain loop flow, the opening regulator TICH111 constant, while
closing the cooling loop, the heating start time, close the trap, making
full use of heat replied; when the temperature reached
the set temperature, the reaction started, you need to remove reaction
heat, the valve should be closed heating circuit, while the cooling
circuit, the regulator TICL111 settings set to the optimum temperature. This
realizes the reactor temperature control, enhance operational stability
of the reactor to improve the conversion rate of the reaction products.Practice
shows that the control scheme makes use of reactor temperature control
accuracy to within 1 ℃; the same time to switch from hot to cold water
speed is less than 5s; As a result of shut-off valve in sequence
control, greatly increase the reliability of temperature control : operation of the system failure rate and misuse zero.
From the original1gatevalve
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