Temperature control system for rotary dryers

Claim 1

A METHOD OF CONTROLLING THE RATE OF EVAPORATION OF MOISTURE FROM A PARTICLE-FORM CARBON BLACK COMPRISING: CONTINUOUSLY FLOWING AN ELONGATED BED OF SAID CARBON BLACK ALONG A SUBSTANTIALLY HORIZONTAL PATH; HEATING SUBSTANTIALLY THE ENTIRE LENGTH OF SAID BED TO EVAPORATE MOISTURE FROM SAID BED; MEASURING THE TEMPERATURE OF SAID BED AT A PLURALITY OF FIRST POINTS IN SAID BED, SPACED ALONG SAID BED AND SPANNING A PREDETERMINED FIRST LOCATION ALONG SAID BED AT WHICH A CONSTANT RATE OF EVAPORATION FROM SAID BED CHANGES TO A FALLING RATE OF EVAPORATION; ADDING THE MEASURED TEMPERATURES AT SAID PLURALITY OF FIRST POINTS TO OBTAIN A FIRST SUM OF SAID MEASURED TEMPERATURES; MEASURGING THE TEMPERATURE AT AN EQUAL NUMBER OF SECOND POINTS, AT A SECOND SUBSTANTIALLY SINGLE-POINT LOCATION ADJACENT THE MOST UPSTREAM ONE OF SAID PLURALITY OF FIRST POINTS; ADDING THE MEASURED TEMPERATURES AT SAID PLURALITY OF SECOND POINTS TO OBTAIN A SECOND SUM OF SAID MEASURED TEMPERATURES; SUBTRACTING SAID SECOND SUM OF SAID MEASURED TEMPERATURES FROM SAID FIRST SUM OF SAID MEASURED TEMPERATURES TO OBTAIN A DIFFERENTIAL VALUE OF TEMPERATURE; COMPARING SAID DIFFERENTIAL VALUE OF TEMPERATURE WITH A FIRST PREDETERMINED VALUE OF TEMPERATURE; ADJUSTING THE HEAT TO THE PORTION OF SAID BED UPSTREAM OF SAID PREDETERMINED FIRST LOCATION IN ACCORDANCE WITH THE VARIANCE OF SAID DIFFERENTIAL VALUE OF TEMPERATURE FROM SAID FIRST PREDETERMINED VALUE OF TEMPERATURE; MEASURING THE TEMPERATURE IN SAID BED AT A THIRD LOCATION, LONGITUDINALLY DISPLACED DOWNSTREAM FROM SAID FIRST LOCATION AND FROM THE MOST DOWNSTREAM ONE OF SAID PLURALITY OF FIRST POINTS; COMPARING THE TEMPERATURE MEASURED AT SAID THIRD LOCATION WITH A SECOND PREDETERMINED VALUE OF TEMPERATURE; AND ADJUSTING THE HEAT TO THE PORTION OF SAID BED DOWNSTREAM OF SAID FIRST LOCATION IN ACCORDANCE WITH THE VARIANCE OF THE TEMPERATURE MEASURED AT SAID THIRD LOCATION FROM SAID SECOND PREDETERMINED VALUE OF TEMPERATURE.

Claim 2

A METHOD OF CONTROLLING THE RATE OF EVAPORATION OF MOISTURE FROM A PARTICLE-FORM CARBON BLACK COMPRISING: CONTINUOUSLY FLOWING AN ELONGATED BED OF SAID CARBON BLACK ALONG A SUBSTANTIALLY HORIZONTAL PATH; HEATING SUBSTANTIALLY THE ENTIRE LENGTH OF SAID BED TO EVAPORATE MOISTURE FROM SAID BED; MEASURING THE TEMPERATURE OF SAID BED AT A PLURALITY OF FIRST POINTS IN SAID BED, SPACED ALONG SAID BED AND SPANNING A PREDETERMINED FIRST LOCATION ALONG SAID BED AT WHICH A CONSTANT RATE OF EVAPORATION FROM SAID BED CHANGES TO A FALLING RATE OF EVAPORATION; ADDING THE MEASURED TEMPERATURES AT SAID PLURALITY OF FIRST POINTS TO OBTAIN A FIRST SUM OF SAID MEASURED TEMPERATURES; MEASURGING THE TEMPERATURE AT AN EQUAL NUMBER OF SECOND POINTS, AT A SECOND SUBSTANTIALLY SINGLE-POINT LOCATION ADJACENT THE MOST UPSTREAM ONE OF SAID PLURALITY OF FIRST POINTS; ADDING THE MEASURED TEMPERATURES AT SAID PLURALITY OF SECOND POINTS TO OBTAIN A SECOND SUM OF SAID MEASURED TEMPERATURES; SUBTRACTING SAID SECOND SUM OF SAID MEASURED TEMPERATURES FROM SAID FIRST SUM OF SAID MEASURED TEMPERATURES TO OBTAIN A DIFFERENTIAL VALUE OF TEMPERATURE; COMPARING SAID DIFFERENTIAL VALUE OF TEMPERATURE WITH A FIRST PREDETERMINED VALUE OF TEMPERATURE; ADJUSTING THE HEAT TO THE PORTION OF SAID BED UPSTREAM OF SAID PREDETERMINED FIRST LOCATION IN ACCORDANCE WITH THE VARIANCE OF SAID DIFFERENTIAL VALUE OF TEMPERATURE FROM SAID FIRST PREDETERMINED VALUE OF TEMPERATURE; MEASURING THE TEMPERATURE IN SAID BED AT A THIRD LOCATION, LONGITUDINALLY DISPLACED DOWNSTREAM FROM SAID FIRST LOCATION AND FROM THE MOST DOWNSTREAM ONE OF SAID PLURALITY OF FIRST POINTS; COMPARING THE TEMPERATURE MEASURED AT SAID THIRD LOCATION WITH A SECOND PREDETERMINED VALUE OF TEMPERATURE; AND ADJUSTING THE HEAT TO THE PORTION OF SAID BED DOWNSTREAM OF SAID FIRST LOCATION IN ACCORDANCE WITH THE VARIANCE OF THE TEMPERATURE MEASURED AT SAID THIRD LOCATION FROM SAID SECOND PREDETERMINED VALUE OF TEMPERATURE.