Early boilers provided this stream of air, or draught, through the natural action of convection in a chimney connected to the exhaust of the combustion chamber. Since the heated flue gas is less dense than the ambient air surrounding the boiler, the flue gas rises in the chimney, pulling denser, fresh air into the combustion chamber.
09-12-2015· Exhaust gas boiler (EGB or EGE) or economiser described in this article is a smoke tube boiler with steam space, used for heat recovery from main engine exhaust gas. An illustration of the boiler is shown in figure below.
14-12-2018· As the exhaust gases cool, water vapor (a natural byproduct of combustion) condenses and turns to liquid water. This is why high-efficiency boilers are often called condensing boilers. Another efficiency feature of many high-efficiency boilers is sealed combustion.
Composite Boilers With diesel machinery the amount of heat carried away by the exhaust gases varies between 20 to 25 per cent of the total heat energy supplied to the engine. Recovery of some of this heat loss to the extent of 30 to 50 percent is possible by means of an exhaust gas boiler or water heater.
Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency (typically greater than 90% on the higher heating value) by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted.
· PDF fileThe exhaust gas economizer in this study would be installed on a Wärtsilä 9L20C engine, and the economizer selected is an Aalborg XS TC7A from Alfa Laval. The result shows the possibilities and potential savings of this investment in terms of lower fuel oil consumption for the auxiliary boilers, the environmental benefits with reduced emissions, a possible installation location and a reasonable pay …
A gaseous reductant, typically anhydrous ammonia, aqueous ammonia or urea, is added to a stream of flue or exhaust gas and is adsorbed [ citation needed ] onto a catalyst. Carbon dioxide, CO 2 is a reaction product when urea is used as the reductant. Selective catalytic reduction of NO
The exhaust gas pipe from the main engine to the exhaust gas boiler measured 50cm in diameter and was installed at the lower starboard side panel of the casing. A few hours after the vessel had berthed, the crew discovered that the exhaust gas boiler wall had heated up and was glowing red. The chief engineer was informed and the fire alarm was
Exhaust Gas Boilers And Economisers working procedure The use of exhaust gases from diesel engine : The use of exhaust gases from diesel main propulsion engines to generate steam is a means of heat energy recovery and improved plant efficiency. An exhaust gas heat exchanger is shown in Figure above.