Steam Boiler Type TDC

The boilers have been designed in accordance with the latest principles with a view to achieving the greatest possible total efficiency and performace - and at the same time complying with present environmental stipulations. The boilers are three-pass fire-tube boilers designed for pressurized combustion with oil or gas and incorporating a furnace with generous design characteristics, i.e. low furnace load and furnace temperature, thus ensuring optimal combustion and minimal NOx emmisions. The convection part consists of two horizontal fire-tube sections of plain steel tubes, without turbulators, dimensioned for efficiently cooling down the flue gases. Design and Workmanship The boilers are of the wet back design. This, coupled with the supporting of the boilers being established by use of drilled stay bolts, allows the boilers optimal flexibility. The boilers are constructed with pressed end plates, and boilers with duties of 4 ton/h or more are provided with fully corrugated furnace. The boilers are manufactured of top quality boiler materials and in compliance with the TRD and DOSH regulations. The boilers comply with the requirements stipulated by relevant design authorities as concerns unattended operation when using approved control and safety equipment. Insulation and Cladding Heat losses are minimized by the application of a 150 mm insulation (mineral wool) on the cylindrical surface of the boiler and front and rear ends alike. The heavy front door insulated in 3x25 mm Rock-wool combines with the extra cover door (standard supply) to reduce to a minimum the radiation loss from the front reversing chamber. Boiler cradles and all suppports for cover plates and platform are insulated so as to omit any direct contact with the boiler pressure part. Furthermore, man holes and access doors are provided with insulated covers. The cladding of the entire boiler surface is finished in blue plastic-coated steel plates with aluminium cover trim. The insulated platform at the top of the boiler protects the cladding and permits ease of installation and general service and maintenance.