1 - Boiler tubes, best-practise cham-fered and root welded, individually exchangeable if needed
2 - Water-cooled boiler jacket absorbs the heat from the firebox (heat exchanger’s first pass) qand preheats the return via a duct along the boiler jacket
3 - Secondary air supply, lambda-controlled, with optimally arranged nozzles for excellent mixing
4 - Anti-burnback provisions
• controlled negative pressure inside the combustion unit
• thermostatic sensor intervening PLC routine
• direct-acting thermostatic water dousing system
• approved spring-loaded damper or rotary air valve
• monitored fuel barrier or 2-fold mechanical separation
5 - Moving grate boiler from > 150 kW
• large-scale solution now available for commercial applications
• fuel is evenly distributed and pre-dried
• automatic de-ashing into a single ash container
• powered by heavy-duty hydraulic unit
6 - Grate element, made of high temperature cast chromium alloy, sectional for easy replacement
7 - Primary air supply, lambda-controlled, with load-dependent distribution to combustion and burnout zone
8 - Ash scraper, for de-ashing of the entire boiler base
9 - Ash auger, for removal of the ash into the central container
10 - Industrial quality
• Wall thickness (standard): Exchanger: 6 mm, Boiler base: 10 resp. 5 mm
• heavy-duty cleaning doors and inspection apertures, functionally arranged
11 - Grate screen, prevents damage from debris to the ash auger
12 - Radiation arch, with optimised air flow, made of high temp firebricks
13 - Combustion chamber
• stoichiometrically designed three zone system
• completey lined with refractory brickwork
14 - Boiler tube cleaning
• unique high-velocity fluegas circulation system
• avoids emission peaks generated by air blasts
• automatic de-ashing in preset intervals, with cleaning effect over the entire tube length
• no interference with the combustion process
15 - Lining with standard firebricks instead of manufacturer specific moulded bricks: simple and cheap to repair