FUEL FIRED CREMATOR FURNACE
India has the world’s largest population adopting the cremation method for funerals. The traditional method is by wooden pyre and in larger towns and cities by electric cremator furnaces.
Due to ecological reasons, the wooden pyre method will gradually phase out. The current technology level which depends on Electric Cremator furnace has many shortcomings, mainly relating to capital cost, cost of operation, compliance with pollution norms etc. For a more detailed comparison of electric furnace with Oil and Gas fired furnace, please see attached write-up.
In the near future, fuel fired Cremators will become the preferred route for cremations, as in the rest of the world, because of its many advantages.
The Wesman – Furnace Construction “Joule” Cremator Furnace is manufactured to the design of our collaborator M/s. Furnace Construction Company Ltd., U.K. and is designed to comply with the current pollution norms of U.K. and other advanced countries, more stringent than current “Indian Pollution Norms” with proven economical operation, long life with low maintenance cost. Furnace Construction has the largest share of the cremator market in the U.K. and have over 350 installations worldwide.
The “Joule” Cremator comprises a unique patented secondary combustion system, built inside a high quality ceramic fiber lined enclosure, surmounting the main or primary combustion chamber. The whole cremator is encased in a rigid steel casing mounted on legs to raise the cremator above floor level and provide ground level ventilation to the Furnace Room floor slab.
The cremator is provided with automatically clamped charge and rake doors to ensure tight sealing during operation. This eliminates the problem of ‘foul smell’ during the cremation process.
The “Joule” cremator incorporates several unique safety features including a patented atomized water mist injector which retards body ignition until the charge door is lowered, thus protecting the Operator from the dangers of “flash-back” on charging and totally eliminating the release of fumes into the furnace room.
The “Joule” cremators are more flexible in their control system, recognizing and responding to a much wider range of operating condition. The system automatically pre-heats the cremator and once charged, will automatically compensate for size and type of body with the help of pre-set timer.
On start up, the charge door is inhibited until the correct temperature has been achieved. Once the cremator is loaded, the door will again be inhibited thus preventing accidental operation.
The quantity of primary and secondary air will be constantly regulated to match the requirements at all stages of operations i.e., when
The body with carrier is charged and
The body becomes the primary source of combustion.
The “Joule” cremator is provided with automatic temperature controlling instruments for both primary and secondary chambers with other safety devices.
Combustion products exit the main chamber through a slot in the rear of the roof, separating the main and secondary zones. The products are mixed with secondary air supplied through a swirler and through the flame of the secondary burner into secondary chamber. The secondary burner modulates and for the major part of the process will be on low fire. The high intensity combustion tube ensures that the products are thoroughly mixed with air and totally burned. The products then exit the tube into a ceramic fiber lined enclosure which being maintained at about 8500C, provides the extra volume required to achieve the designated retention time, which is two seconds as per U.K. norms. Alternatively as per Indian norms, the temperature can be maintained at 10500C. and gases retained for one second. These ensure that no additional pollution control apparatus are needed to meet the pollution norms.
On completion of the cremation the cremated remains are raked into an ash sump at the end of the main hearth, where they are finally collected and cooled in a funnel type ash pan.
A sophisticated computerized control system for fully automatic operation and continuous monitoring and data logging of the cremator can be offered, as an option, if required by customer. The whole system is designed to be operated by a person without need for a special skills
Wesman supplies a complete installation on turn-key basis complete with oil storage tanks, oil heating and pumping systems, oil, gas,air, water pipelines, gas trains, burner ignition and safety systems and a 30 meter high chimney.
In areas where power outages are common, the Fuel Fired cremator has a distinct advantage over Electric Cremators as the process can be continued without interruption by standby diesel power generators. Also unlike Electric cremators, the fuel fired cremators can be started and stopped at will as the warm up time is short.
The Cremator can be easily modified to be used as a hospital incinerator upto a capacity of 1 MT/hour of hospital waste.