BI Comb SGM.GB

4.2.3 COMBUSTON AIR FANS WITH RELATIVE DUCTSThese are ambient temperature-type ducts, with directly-coupledmotor. The combustion air is channelled in the metal-framedducts. The duct throttle valve is parallel with the externalarm, which rotates 90° in the sector. As a result, the throttlewill be open when the arm is positioned length-wise along theduct, and closed when it is positioned cross-wise.- PRIMARY AIR COMBUSTION FANMain primary air regulation registerDamper and counterweightUpper primary air register A3MS feeder primary air register A1Mobile grate primary air register A24.2.4 FURNACE IN COMBUSTION CHAMBERCOMPONENTS:- Welded high-thickness refractory steel trough, with stiffeningribs.- Row of grates in special cast iron, designed for high-temperatures.- Row of fixed, sloped refractory steel grates.All the grates are slotted into the structures below.To disassemble them, first remove the fixed sloped gratesby simply lifting them up, and then the mobile sloped grates,in the same way.- SECONDARY COMBUSTION AIR FANSR secondary air register above the grateL secondary air register above the grateR secondary post-combustion air registerL secondary post-combustion air registerA4A511