Laserfiche WebLink
C <br />0 <br />u <br />0 <br />C <br />r], <br />n <br />u <br />I <br />C <br />0 <br />u <br />n <br />I1 <br />F <br />Ii <br />7 <br />controlled using a Proportional — Integral — Derivative (PID) controller. <br />The PID controller shall maintain the temperature within +/- 10 degrees F <br />of the set point temperature. <br />B. If during normal run time operation the flare experiences a flare failure, the <br />control logic shall automatically try to re -light the flare one time. If this is <br />successful, the flare operation will continue as normal. <br />A. The logic for timed operation is identical to that of normal operation except <br />that the flare will operate on a timed cycle (to be programmable by the <br />system operator) intermittently throughout the day. The program should be <br />suitable for starting and stopping the flare up to four times per day. The <br />flare will operate in the timed mode when the "FLARE' switch is placed in <br />the "TME1D" position rather than the "AUTO" position. <br />1.05 DIGITAL OUTPUTS TO DIALER <br />A. The PLC will give discrete output signals to the dialer for any of the <br />following conditions: <br />1. If the compressed air pressure falls below the set point <br />2. If the flare temperature falls below the low temperature set point <br />(to be determined) <br />3. The flare temperature rises above the high temperature set point <br />4. If the LFG flow is less than the minimum set -point <br />5. If the LFG flow exceeds the maximum set -point <br />6. A flame failure from the flame safeguard system <br />7. An additional channel will indicate if the main flame is on. This <br />channel will not call out an alarm. It is to indicate that the flare is <br />operating when the operator calls the station. <br />8. Power failure (built into the dialer) <br />North County LFG Collection System 3 <br />San Joaquin County Public Works <br />FLARE STATION PLC CONTROL <br />Section 16020 <br />