A FAST METHOD OF ONLINE COAL IDENTIFICATION IN A

DROP TUBE FURNACE

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

METHODOLOGY

1. DROP TUBE FURNACE

2. FLAME MONITOR

3. DATA PROCESS

1. DROP TUBE FURNACE

CAN BE DIVIDED INTO TWO SECTIONS IGNITION SECTION &BURNOUT SECTION

IGNITION SECTION1. LENGTH 1500mm2. ELECTRIC POWER 20KW3. TEMPERATURE 850C

BURNOUT SECTION1. LENGTH 2000mm2. ELECTRIC POWER 20KW3. TEMPERATURE 1350C

2. FLAME MONITOR

OBSERVATION WINDOW

FLAMEDETECTOR

SIGNALPROCESSING

CIRCUIT

DATAACQUISITION PC

3. DATA PROCESS

where P(n) is the power density of the nth frequencycomponent f(n) of the flame signal, and N is the total

numberof frequency components

The following matrixes would be inducted.

Correlation coefficientof two matrixes X(n) and Y(n) can be calculated as following

RESULT AND DISCUSSION

1. IDENTIFICATION OF SINGLE COALS

2.IDENTIFICATION OF BLENDED COALS

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

REFERENCES

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