2. A FAST METHOD OF
ONLINE COAL
IDENTIFICATION IN A
DROP TUBE FURNACE

3. INTRODUCTION
AMONG ALL TYPES OF ENERGY THERMAL ENERGY PLAYS A KEY ROLE
 THE SAFETY AND EFFICIENCY OF RUNNING THE THERMAL POWER PLANTS ARE
VERY IMPORTANT
 THE TYPE OF COAL IS MADE SURE THE POWER PLANT SYSTEM CAN BE
CONTROLLED WELL
 BUT IDENTIFICATION OF THE COALS ONLINE IS HARD ESPECIALLY FOR THE
BLENDED COALS
3 FLAME INFORMATION INCLUDING AVG,STD DEV AND OSC FRE ARE EXTRACTED
BY A FLAME DETECTOR
USING THIS DATA FLAME FEATURE MATRIXES ARE FORMED
BY CALCULATING THE CORRELATION COEFFICIENT OF THE MATRIXES BOTH
SINGLE COALS&BLENDED COALS CAN BE IDENTIFIED WELL

4. METHODOLOGY
1. DROP TUBE FURNACE
2. FLAME MONITOR
3. DATA PROCESS

5. • DROP TUBE FURNACE
 CAN BE DIVIDED INTO TWO SECTIONS
IGNITION SECTION &BURNOUT SECTION
IGNITION SECTION
 LENGTH 1500mm
 ELECTRIC POWER 20KW
 TEMPERATURE 850C
BURNOUT SECTION
 LENGTH 2000mm
 ELECTRIC POWER 20KW
 TEMPERATURE 1350C

7. 1. FLAME MONITOR
SIGNAL DATA
OBSERVATION FLAME
WINDOW DETECTOR
PROCESSING ACQUISITION PC
CIRCUIT

8. 1. DATA PROCESS

9. where P(n) is the power density of the nth frequency
component f(n) of the flame signal, and N is the total
number
of frequency components
The following matrixes would be
inducted.

10. Correlation coefficient
of two matrixes X(n) and Y(n) can be calculated as following

11. RESULT AND DISCUSSION
• IDENTIFICATION OF SINGLE COALS

14. 1.IDENTIFICATION OF BLENDED COALS

18. CONCLUSION
A FLAME MONITOR INCLUDING FLAME DETECTOR IS USED TO IDENTIFY
COALS IN A DROP TUBE FURNACE.BY EXTRACTING AVG,STDDEV,OSC
FREQUENCY MATRIX OF FLAME SIGNAL.CALCULATE CORRELATION
COEFFICIENT OF THE MATRIXES BOTH SINGLE &BLENDED COALS CAN BE
IDENTIFIED FAST ONLINE

19. REFERENCES

20. A FAST METHOD OF ONLINE COAL
IDENTIFICATION IN A DROP TUBE FURNACE