Emergency shutdown process and system for carbon black plant

Claim 1

IN A CARBON BLACK PLANT COMPRISING A FIRST REACTOR HAVING A FUEL GAS LINE FOR INJECTING FUEL GAS FROM A FUEL GAS SUPPLY LINE TNAGENTIALLY INTO SAID FIRST REACTOR, A FIRST AIR SUPPLY LINE FOR INJECTING AIR FROM A SOURCE THEREOF TANLINE FOR INJECTING CONVERSION OIL AXIALLY FROM AN OIL SOURCE INTO SAID FIRST REACTOR, AND FIRST EFFLUENT SMOKE CONDUIT MEANS LEADING TO FIRST CARBON BLACK COLLECTION MEANS, A SECOND REACTOR HAVING SECOND AIR SUPPLY LINES FOR INJECTING AIR FROM SAID SOURCE THEREOF INTO SAID SECOND REACTOR, A SECOND OIL SUPPLY LINE FOR INJECTING CONVERSION OIL FROM SAID OIL SOURCE AXIALLY INTO SAID SECOND REACTOR, AND SECOND EFFLUENT SMOKE CONDUIT MEANS LEADING TO SECOND CARBON BLACK COLLECTION MEANS; A SAFETY SYSTEM COMPRISING A FIRST RECYCLE LINE CONNECTING SAID FIRST OIL SUPPLY LINE AT A POINT UPSTREAM OF SAID FIRST REACTOR WITH SAID SOURCE OF OIL HAVING A NORMALLY CLOSED FIRST MOTOR VALVE THEREIN; A NORMALLY OPEN SECOND MOTOR VALVE IN SAID FIRST OIL SUPPLY LINE BETWEEN AFORESAID POINT, AND SAID FIRST REACTOR; CORRESPONDING SECOND OIL RECYCLE LINE AND THIRD AND FOURTH MOTOR VALVES CONNECTED WITH SAID SECOND OIL RECYCLE LINE AND SECOND OIL SUPPLY LINE, RESPECTIVELY; NORMALLY OPEN MOTOR VALVE MEANS IN SAID SCOND AIR SUPPLY LINES; FLOW RATE SENSING MEANS IN SAID SECOND AIR SUPPLY LINES; FLOW CONTROLLER MEANS ACTUATED BY SAID FLOW RATE SENSING MEANS AND ACTUATING SAID MOTOR VALVE MEANS TO MAINTAIN A SELECTED FLOW RATE THEREIN; AN ATOMIZING AIR LINE CONNECTED WITH SAID SECOND OIL LINE ADJACENT SAID SECOND REACTOR HAVING A NORMALLY OPEN FIFTH MOTOR VALVE THEREIN; A PURGE GAS LINE CONNECTED WITH SAID SECOND EFFLUENT SMOKE CONDUIT MEANS HAVING A NORMALLY CLOSED SIXTH MOTOR VALVE THEREIN; AN INSTRUMENT AIR HEADER; A FRIST AIR LINE FROM SAID INSTRUMENT AIR HEADER TO FLOW CONTROLLER MEANS; A FIRST SOLENOID-OPERATED 3-WAY VALVE IN SAID FIRST AIR LINE; A SECOND SOLENOID-OPERATED 3-WAY VALVE IN CONTROL OF SAID THIRD AND FOURTH MOTOR VALVES; A THIRD SOLENOID-OPERATED 3-WAY VALVE IN CONTROL OF SAID SIXTH MOTOR VALVE; A FOURTH SOLENOIDOPERATED 3-WAY VALVE IN CONTROL OF SAID FIFTH MOTOR VALVE; A FIRST CIRCUIT FROM AN ELECTRIC POWER SOURCE, THE SOLENOIDS OF SAID 3-WAY VALVES BEING CONNECTED THEREIN IN PARALLEL; SOLENOIDS AND SAID POWER SOURCE SENSITIVE TO THE OIL PRESSURE SWITCH TO DE-ENERGIZE SAID SOLENOIDS AND REVERSE SAID THEREIN OUTSIDE OF A SELECTED RANGE OPERATES SAID FIRST PRESSURE SWITCH TO DE-ENERGIZE SAID SOLENOIDS AND REVERSE SAID MOTOR VALVE MEANS AND SAID THIRD, FOURTH, FIFTH, AND SIXTH MOTOR VALVES.