Thursday, February 24, 2011

MAIN ENGINE SCAVENGE FIRE , ON CHEMICAL TANKERS-- CAPT AJIT VADAKAYIL




SCAVENGE FIRE CHECK LIST


Cb
S No

                                                 Description


INDICATIONS

1
Activation of High temperature alarm of the respective unit’s scavenge port .

2
High Exhaust temperature.

3
Abnormal behavior of Main Engine.

4
Surging of Turbochargers with smoke emanating.

5
Sparks / flame from scavenge drain ( check under piston space through sight glass if fitted )

6
Heavy black smoke from funnel, sparks are visible at night.

7
Hunting due to unbalance of power on each cylinder.



ACTION


Inform bridge and Chief Engineer. Activate Engineer’s call alarm.


Increase Cylinder Lubrication to maximum


Change over ME controls from bridge to ECR.


Instruct crew to keep clear of scavenge doors


Slow down Main Engine to dead slow ahead—if not automatically slowed down.


Stop the auxiliary blowers and decrease fuel handle for 0.5 bars scavenge pressure.


Shut the scavenge drains of affected unit—ensure they are shut all the time.


Use relative wind to keep soot on poop deck.


Cut out unit and change over  to D.O.


Start Standby Auxiliary Engine.


Stop the Fresh Water Generator.


Stop Main Engine. Do not stop any circulating (J. C .W., P. C. W., L. O.) pumps.


Engage turning gear immediately, open indicator cocks and keep turning engine , all the while operating Cylinder lubricator manually.


Cover Turbo Charger air suction filter and shut off Engine Room fans to reduce ingress of air.


Drain off water from steam smothering line.


Inject dry steam to the unit concerned and wait for temperature to fall.


Keep portable extinguishers standby near scavenge doors.


After the fire is extinguished, first wait for the temperatures to fall and then only open scavenge doors .


Clean scavenge space and check carefully for any damage. Examine the condition of scavenge valves, piston rings, stuffing box, liner & piston rod.


Clear scavenge drains and clean the scavenge space.


With main LO pump running check the scavenge spaces for LO leakage.


Start Main Engine and operate under strict monitoring.


Revert back to original MECYL feed rate .


Find out the cause of the scavenge fire and take action to prevent recurrance.



PROBABLE CAUSES

a
Gas blow by due to liner wear.

b
Gas blow by due to bad piston rings.

c
Excessive accumulation of sludge in scavenge spaces.

d
Poor atomization / combustion due to bad injection nozzles.

e
Prolonged slow speed operation of M/E with poor quality combustion.

f
Leakage of piston cooling lubricating oil.

g
Excessive MECYL lubrication.

h
Hot spots due to insufficient MECYL feed.


Notes:
Thermocheck by touch and feel to see if scavenge drain pipes are clogged. If so remove sludge.

Read fuel analysis reports and take corrective action for proper viscosity injection

Keep a watch on reconditioned and suspect piston crowns.

Visually inspect from scavenge ports to check leakage of MECYL.

Most efficient way is to inject steam as soon as engine is stopped with propeller still turning engine on inertia.

Fire in scavenge AIR space can trigger explosion in exh gas manifold and damage constant pressure T/C. The BDC cylinder will have both ports open –flame will burn liner. Hence you must consider to cut off fuel to cylinder which is on  fire.


CAPT AJIT VADAKAYIL
..

3 comments:

  1. Great post! I've got an idea here. Thanks for sharing this information. It will really help.

    Fire Extinguisher Sales & Service in Las Vegas

    ReplyDelete
  2. nm rk
    November 2, 2017 at 12:02 PM
    Dear Captainji,Readers

    This is regarding NTPC RaeBareily Accident involving many lives.


    https://timesofindia.indiatimes.com/india/ntpc-plant-boiler-explosion-18-dead-toll-may-rise-as-many-feared-trapped/articleshow/61426217.cms
    XXXXXX

    Heads responsible must be dismissed and severely punished.I pray to Bhagwan wishing the departed souls to rest in peace.


    With Regards,
    Rajkiran

    Delete
    #####################
    Capt. Ajit Vadakayil
    November 2, 2017 at 1:05 PM

    I HAVE PREDICTED SEVERAL MAJOR DISASTERS AT SEA-- AND INCLUDED IT IN THE SHIPS SAFETY COMMITTEE REPORT WELL IN ADVANCE.

    ALL OF IT CAME TRUE

    AS A CAPTAIN I COULD NOT GO TO ENGINE ROOM TO SABOTAGE , RIGHT?

    LET ME REMEMBER THE LAST ONE ABOUT A BOILER

    I RAISED THE ISSUE IN THE SHIPs SAFETY COMMITEE MEETING --AND THE STUPID SARDARJEE CHIEF ENGINEER STARTED FIGHTING WITH ME-- HE SAID MY FEARS ARE UNFOUNDED

    BASICALLY HE WAS TRYING TO KEEP HIS OWN CHAIR SAFE— AND HE DID NOT EVEN UNDERSTAND BASICS .

    #################

    I JOINED THE SHIP AT PANAMA CANAL

    THE WINCHES WERE STEAM--THE BOILERS WERE HUGE

    WHILE ENTERING THE CANAL THE WINCHES WENT PHUTTT AS BOILERS TRIPPED

    SOMEHOW I MANAGED BY GETTING ALL HANDS ON DECK TO PULL ROPES WITH SHEER MUSCLE POWER-- AND I ASKED THE PILOT NOT TO REPORT IT ( WHISKY ) AND CAUSE A DELAY

    IN SUCH SCENARIOS IF CAPTAIN PUTS PRESSURE ON HIS ENGINE STAFF--THEY BYPASS USUAL SAFETY PROCEDURES, TO SAVE THEIR OWN JOBS

    THE SHIP HAD COME OUT OF DRYDOCK ONLY A MONTH AGO, AND DURING BRIEFING AT THE US OFFICE , I FOUND THAT THE ATMOSPHERIC CONDENSER TUBES -- 900 OF THEM WERE RENEWED.

    THE BOILER WAS TRIPPING AS WATER MUST ENTER THE BOILER -- NOT STEAM

    WHEN YOU HAVE STEAM WINCHES THE " NARROW" INLET TUBES ON DECK OF A 900 FOOT LONG SHIP TAKES THE STEAM TO THE WINCHES --IT EXPANDS AFTER THE WORK IS DONE AND THE DEPLETED STEAM COMES BACK VIA A " WIDE " RETURN PIPE.

    IT S THEN CONDENSED TO WATER AND SEND BACK TO BOILER --AS A CLOSED LOOP SYSTEM

    HOWEVER IF THE STEAM IS USED TO HEAT CARGO INSIDE TANKS -- THE ENGINEERING IS REVERSE—

    HERE THE INLET STEAM TUBES ARE "WIDE" AND THE RETURN WATER TUBES ARE "NARROW" AFTER EXCHANGING HEAT-- WATER IS INSIDE THE RETURN TUBES GO BACK TO THE BOILER HOTWELL AND THEN INTO THE BOILER --AS A CLOSED LOOP SYSTEM

    I HAVE NEVER SEEN ANY CUNT ENGINEER AT SEA UNDERSTANDING THIS SIMPLE CONCEPT

    EVERY SHIP I GO, I TELL THE SHORE OFFICE TO CHANGE THE INSTRUCTIONS IN THE TECHNICAL MANUALS .

    ON CHEMICAL TANKERS IGNORANCE CAN BE DANGEROUS

    http://ajitvadakayil.blogspot.in/2010/06/steam-heating-on-chemical-tankers-capt_06.html

    http://ajitvadakayil.blogspot.in/2011/11/marine-engineering-self-examiner.html

    SO SO SO

    AFTER TRANSITTING THE PANAMA CANAL, I HELD A SAFETY COMMITEE MEETING

    I FOUND THE SARDARJEE CHIEF ENGINEER ( WE HAD SAILED BEFORE WHEN I WAS SECOND MATE ON A 3 LAKH TONNER CRUDE CARRIER VLCC-- HE WAS TRAINEE FIFTH ENGINEER ) AND HIS ENGINEERING TEAM TO BE STUPID-NAY –CUNTS .

    ANYWAY I GAVE ORDERS - -THE STEAM WINCH "WIDE" SILVER PAINTED RETURN PIPE CARRYING STEAM BACK TO THE ATMOSPHERIC CONDENSER ( ALMOST ALL TUBES CHOKED BY TOUGH SCALE ) --800 FEET IN LENGTH MUST BE PAINTED BLACK--

    THE COLOUR BLACK IS A GOOD RADIATOR OF HEAT

    THE CUNT ENGINEER DID NOT EVEN KNOW THE PROPERTIES OF SILVER AND BLACK COLOUR

    CONTINUED TO 2-

    ReplyDelete
    Replies
    1. CONTINUED FROM 1-

      THE NEXT FIAT WAS-- TILL THE 90% CHOKED TUBES OF THE ATMOSHPERIC CONDENSOR WAS CLEARED , THE STEAM WINCH MUST BE KEPT ROTATING IDLE --FOR AT LEAST 20 MINUTES BEFORE ACTUAL USE

      THIS WAS TO PREVENT JHATKA ( SURGE )- WHERE WATER FROM COLD RETURN PIPES GOES INTO THE BOILER FIRST AND THEN SUDDENLY HOT STEAM ENTERS

      JATKA CAN MAKE HONI INTO ANHONI-- AND ANHONI INTO HONI ( MAKE OR BREAK WHERE REVERSE HOLDS TRUE )

      I USED JHATKA AS A CHANGE MANAGEMNT TOOL TOO.—THE FAMOUS VADAKAYIL KALARI TAP ON NOSE

      LATER I USED THE SAME JHATKA PRINCIPLE TO CLEAR THE SCALE CHOKED TUBES WITH HOT STEAM AND COLD FREON GAS

      http://ajitvadakayil.blogspot.in/2011/10/marine-engineering-self-examiner-water.html

      YOU KNOW HOW A CHAMPION RACE HORSE FEELS WHILE IN THE SOLE COMPANY OF DONKEYS -- AND HE IS FORCED TO BRAAAAY --JUST TO BLEND IN AND BE PART OF THE FUCKIN’ TEAM

      LATER THE SAME BOILER FURNACE HAD A EXPLOSION ( THE WEAK AREA OF THE FURNACE GAVE WAY ) AND SAVED THE SHIP-- I KNEW THE SPOT ..

      WHEN THE FURNACE EXPLODED I ASKED THE CHIEF ENGINEER TO CHECK THE DELIBERATE WEAK CRUMPLE ZONE SPOT AND HE CONFIRMED IT— LEST THE EXPLOSION BECOMES A BOMB . HERE A BOMB IS CONVERTED TO A WEAK POOFFFF

      I HAD PREDICTED THIS A WEEK IN ADVANCE AND SEND SEVERAL MESSAGES TO THE SHORE BOSSES.

      THIS WAS ABOUT THE WATER WALL PROTECTING THE REFRACTORY. IF THERE IS NO WATERWALL THE REFRACTORY OF THE FURNACE BECOME WHITE HOT --AND BECOMES A PERMANENT HEAT LEG OF THE FIRE TRAINGLE

      IN BOILER FURNACE-- AS SOON AS THE BOILER TRIPS HUGE FD FANS INJECT FRESH AIR BY ACC ( AUTOMATIC COMBUSTION CONTROL )

      SO SO SO

      HEAT IS THERE . FRESH OXYGEN IS INJECTED AND FUEL REMAINS IN A PUDDLE ( FURNACE OIL ) AT THE BOTTOMF THE FURNACE AS THE INJECTION NOZZLE AND SWIRLER IS NO GOOD WITH IMPROPERLY MAINTAINED OIL TEMPERATURES FOR FUEL INJECTION VISCOSITY

      http://ajitvadakayil.blogspot.in/2011/02/naive-sailor-low-sulphur-fuels-capt.html

      ASK ANY MARINE ENGINEER ANYWHERE ON THIS PLANET TO READ THIS COMMENT AND EXPLAIN THE GIST-- HE WILL SHIT IN HIS ENGINEERING LANGOT AND KEEP QUIET. HE WILL NOT BE GOOD ENOUGH TO COMMENT

      FUCKIN' CUNTS !

      READ THE SOLE COMMENT IN THE POST BELOW--

      http://defenseblog-njs.blogspot.in/2012/09/ins-vikramaditya-trial-malfunctions-to.html

      http://ajitvadakayil.blogspot.in/2011/01/economiser-on-chemical-tankers-capt.html

      http://ajitvadakayil.blogspot.in/2011/01/naive-sailor-fire-fighting-capt-ajit.html

      http://ajitvadakayil.blogspot.in/2011/02/me-crankcase-oil-mist-detector-alarm-on.html

      http://ajitvadakayil.blogspot.in/2011/02/main-engine-scavenge-fire-on-chemical.html

      BELOW IS AN EXAMPLE OF JHATKA—HONI CAN BECOME ANHONI

      http://ajitvadakayil.blogspot.in/2012/05/liquid-hammer-on-chemical-tankers-capt.html

      capt ajit vadakayil
      ..

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