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04.09.2015. Construction and Working of Waste Oil Incinerator
According to Annex V of MARPOL 1973/78 convention of IMO, guidelines regarding the waste materialstorage and disposal of waste at sea need to be strictly followed. Incineration of various materials suchas galley waste, food scraps, accommodation waste, linen, card boards, oil sludge from lubricating oil,fuel oil, bilge and purifier, and sewage sludge, is one of the most effective ways of disposal and savingstorage capacity of the tanks and waste storage containments on ships.
Moreover, the residue left from the incineration can be easily disposed off as it mainly consists of ash.
The image below shows the diagram of a vertical cyclone type incinerator with a rotating arm device toimprove combustion and remove ash and non combustibles from the surface.
04.09.2015. Construction and Working of Waste Oil Incinerator
A sludge burner is placed in the incinerator to burn and dispose sewage, sludge and waste oil. Anauxiliary oil burner is also fitted to ignite the refuse. Automatic controls provided for the system securethe igniter when the refuse starts burning without the need of the igniter. Combustion air is supplied withthe help of forced draught fan.
A loading door, pneumatically operated, is provided to load the refuse. An interlock is also provided withburner and forced draught fan, which trips when the loading door is in open condition as part of thesafety.
Solid waste is fed from the loading door and the incineration process starts after closing the door. Liquid
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waste is fed into the system when the refractory of the incinerator becomes hot.
After the completion of the incineration process, the incinerator is allowed to cool down and residue likeash and the non combustibles are removed by pulling the ash slide door. The rotating arm scrapes offthe entire solid residue in the ash box which can be easily disposed.
During incineration it is important to control the exhaust temperature, which should not be very high ortoo low. High temperature could lead to melting of metal and can cause damage to the machinery,whereas too low temperature will not be able to burn the residue and sterilize and remove odor from theresidue.
This temperature control can be achieved by introducing colddiluted air in the exhaust stream at thepoint which is as close to incinerator discharge.
About MohitMohit Kaushik is a marine engineer sailing with Maersk Shipping. He handles website developmentand technical support at Marine Insight. Apart from handling web development projects, he alsomanages a logistics company and have a keen interest in modern logistic technologies .
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04.09.2015. Construction and Working of Waste Oil Incinerator