The Farsta district heating plant was built in the late fifties and is today serving as a peak load plant. Fortum plans to replace the existing boilers in the plant with one new oil fired boiler, HOB. The new boiler will be fired with light fuel oil no.1 (EO1). It shall also be designed for the possibility of firing Bio oil RME in the future. The boiler shall be directly connected to the district heating system. An economizer is not foreseen. Circulation through the boiler for the purpose of minimum flow and inlet water temperature shall be made with a separate circulation pump. The boiler is expected to be directly fired, without a flue gas fan. Combustion air shall be a mixture of indoor and outdoor air. No flue gas filter is foreseen initially.
The thermal rating is 95 MW fuel input. District heating temperature to the plant around 60°C and from the plant 115°C. Design data for mechanical design is Water side: 16 Bar(g)/120°C. The mechanical design needs to be selected such that the equipment is fitted in the available space in the existing building.
The dimensions of the available space are: With: 9,6 meters, Height: 14,6 meters, Length: 15,7 meters.
The boiler and flue gas fans shall be located within the available space.
The boiler will be installed during the first half of 2018.
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