Incinerator is in the shape of a vertical cylindrical chamber with an inverted funnel shaped chimney at the the top. The cylindrical chamber consists of a burning chamber just as in case of oil fired burners, which are lined with refractory materials at the inside. An oil fired burner is provided to initiate the ignition process. It is extremely important that the temperature inside the cylinder is controlled and for this reason thermostats are used. To provide an uninterrupted flow of air for the combustion, forced draft fans are provided. The air supplied is directed upwards in swirls with the help of strategically designed ports.
A rotating shaft with ...view middle of the document...
The oily sludge is first heated up to a temperature which can facilitate the difficult process of burning oily waste. Once optimum temperature is reached, the oil is passed into the combustion chamber.
The burner then burns the mixture at a thermostatically controlled temperature so as to induce a complete combustion. The force draught fan provides continuous supply of air and the rotating shaft creates the required swirling of air. The ash that is created is collected in the ash slide. This ash can be disposed to the sea or stored to dispose it at the next port.
In many ships these incinerators are not used properly and it should be made a practise so that all staff right from thejunior engineer, deck cadet to the chief engineer and master are aware of its use. This would go a long way in improving the quality of sea water as well as reduce stress on their minds in that they are doing everything as per themaritime law.
A waste treatment technology, which includes the combustion of waste for recovering energy, is called as “incineration”. Incineration coupled with high temperature waste treatments are recognized as thermal treatments. During the process of incineration, the waste material that is treated is converted in to IBM, gases, particles and heat. These products are later used for generation of electricity. The gases, flue gases are first treated for eradication of pollutants before going in to atmosphere.
Among waste-to-energy technologies, incineration stands taller. Other technologies are gasification, PDG, anaerobic digestion and Pyrolysis. Some times Incineration is conducted with out the reason for recovering energy.
In past, incineration was conducted with out separating materials thus causing harm to environment. This un-separated waste was not free from bulky and recyclable materials, even. This resulted in risk for plant workers health and environment. Most of such plants and incinerations never generate electricity.
Incineration reduces the mass of the waste from 95 to 96 percent. This reduction depends upon the recovery degree and composition of materials. This means that incineration however, does not replace the need for landfilling but it reduced the amount to be thrown in it.
Incineration comes with a number of benefits in specific areas like medical wastes and other life risking waste. In this process, toxins are destroyed when waste is treated with high temperature.
Incineration or thermal treatment of waste is much popular in countries like Japan where there is scarcity of land. The energy generated by incineration is highly demanded in countries like Denmark and Sweden. In year, 2005 it was estimated that 4.8 percent of the electricity as is consumed by Danish nation was produced by incineration and the amount of heat was some 13.7 percent out of total. Other then Denmark and Sweden many European countries are recovering heat and electricity from waste.
Incinerators and their...