What is the function of exhaust gas economizer?
The Exhaust gas economiser in a ship is like a huge heat exchange that exchanges heat between exhaust gas from engines to water and produces steam for the same purpose that auxiliary boilers produce steam.
Which type of soot blower advances into the furnace cleans and retracts?
WALL DESLAGGER (SHORT RETRACTABLE SOOT BLOWER) (SRSB) Trust Well Wall Deslaggers designed to remove Soot/ Ash/ Slag deposited on Furnace Wall/ Side Wall Tubes. The lance Element retracts and cleans Soot deposited on side wall/ furnace tubes.
How do you fight EGB fire?
Steps for Prevention of Fire
- Avoid slow steaming of the main engine.
- Ensure good fuel combustion in the main engine.
- Ensure fuel is treated and is of good quality while supplying to the engine.
- Do regular soot blow of boiler tubes.
- Do water washing in ports at regular interval.
Why are nozzle tubes provided in the soot blowers?
Explanation: The products of combustion cling to the water tubes, economizer tubes, air preheater tubes and super heater tubes. This lowers the efficiency of the plant by reducing heat transfer. Explanation: Soot blower consists of a set of tubes fitted with nozzles carrying high velocity jet of steam or air.
What is the advantage of using retractable Sootblower?
These low cost, compact and easily maintainable sootblowers are constructed for dependable operation indoors or outdoors in all climates. They can use air, saturated or superheated steam as a cleaning medium and their compact design makes it possible to fit these units in tight spaces.
What are exhaust gas boilers and economisers for?
Exhaust Gas Boilers And Economisers Arrangement Auxiliary boilers on diesel main propulsion ships, other than tankers, are usually of composite form, enabling steam generation using oil firing or the exhaust gases from the diesel engine. With this arrangement the boiler acts as the heat exchanger and raises steam in its own drum.
How does the nozzle work on a soot blower?
The nozzle assembly moves slowly over the face of the heat transfer surface. The nozzle arm simultaneously swings in an arc across the face of the heat transfer surface. The blowing cycle takes one pass across the heating face either from the periphery of the rotor to the central rotor post or in the reverse direction.
Is it dangerous to use an exhaust gas economiser?
Soot fires in exhaust gas fired boilers and economisers are extremely dangerous, catastrophic and can seriously jeopardise the safety of the vessel. Ship’s staff should be aware of the dangers and methods of prevention.
Which is the best soot blower for air heater?
For air heater service, saturated steam is applied sporadically instead of the moisture content in that quality of steam. However, as per experience, dry superheated steam is found to be the most effective medium of AH soot blowing than either compressed air or saturated steam.