HUMIDITY AND TEMPERATURE CONTROL IN WATER BOX ( CONFINED SPACE ) OF OPERATING SINGLE PASS STEAM TURBINE CONDENSER

DATE : 15.11.2009

STEAM TURBINE CONDENSER ( TUBES AND SHELL DESIGN) OPERATING CONDITIONS :

1. WATER INLET TEMP : 29 DEG C ( IN NOVEMBER )

2. WATER OUTLET TEMP : 40 DEG C

3. CONDENSATE TEMP : 47 DEG C

4. WATER FLOW : 26500 T/ HR

5. NO. OF PASSES : 2

6. NO. OF TUBES : 19000

7. TUBES MATERIAL : SS

8. STEAM TURBINE CONNECTED WITH TWO BOILERS.

- CONDENSER TUBES FOULING DETEORIATES VACUUM THEREBY

LOWERS PERFORMANCE AND EFFICIENCY OF THE PLANT .

- STEAM TURBINE SHUT DOWN REQUIRED FOR 10 DAYS TO CLEAN

THE CONDENSER COMPLETELY

- ALTERNATIVELY WHEN ONE GAS TURBINE / WHRB IS UNDER

SHUT DOWN , STEAM TURBINE CONDENSER COULD BE CLEANED

ONE PASS AT A TIME BY ISOLATING THE PASS WITH CLOSING OF

INLET AND OUTLET VALVES , OPENNING OF CONDENSER INLET

AND OUTLET MANHOLE DOORS , DRAIN AND VENT LINES

.condenser open.jpg

CONDITION INSIDE THE SINGLE PASS OPERATING CONDENSER WATER BOX IS NOT HUMANLY COMFORTABLE OF LONG DUARTION OF WORK

TEMPERATURE : 46 DEG C

HUMIDITY : 80 %

TO MAKE THE WORKING CONDITION COMFORATBLE & CONDUCIVE TO WORK , M/S TECHNICAL DRYING SERVICES WERE ENGAGED FOR

REDUCING TEMPERATURE & HUMIDITY , INSIDE THE WATER BOX

SYSTEM CONSISTS OF DE HUMIDIFIER , CONDENSER ( REFRIGERATOR UNIT ) AND BLOWER . AIR SUCKED FROM THE ATMOSPHERE PASSES THROUGH DE HUMIDIFIER , THEN THROUGH THE REFRIGERATOR , FINALLY INTO THE WATER BOX THROUGH A FLEXIBLE DUCT . AIR ENTERS FROM THE FRONT MANHOLE AND EXISTS FROM THE BACK MANHOLE THROUGH THE TUBES .

CONDITONS INSIDE THE WATER BOX ACHIEVED WAS

TEMPERATURE 24 DEG C

HUMIDITY 50 %

Humidfier and condenser.jpg air duct to condenser 1.jpg air duct to condenser.jpg air duct to condenser 2.jpg

CONDITIONS IMPROVED FOR CONTINUOS WORKING INSIDE THE CONDENSER WATER BOX

AND THIS WHAT THE WORKERS HAVE TO SAY !!!!!

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