The outcome of one-year joint development was the assembly of the new high-temperature oven PPP 1,3 10,4.225-HT,D with remarkable output 1 000 kg/hour. During 2016 the trial testing run was carried out in Netherlands, subsequently the assembly was then finished in Teheran.
The oven is intended for baking Iranian bread of „lavash“ type that gets its characteristic rectangular shape even after the finishing of baking by the manner so-called „breaking“ from the pre-arranged perforated stripe of dough. This dough stripe of width 1,3m and just 1 mm thickness is baked at high temperature 420°C during only 20 s. To achieve such a high temperature, 14 burners are used and they are built in the baking space of the oven.
One of the main requirement for the development of new type of oven was to separate the flame of the burner from the baking space to assure high quality of bread. Each burner transfers its heat into its own heat-exchanger that is warmed up to red colour and thus it ensures not only convection heat but also radiant heating. Radiant heating runs mostly in infra-red spectrum that penetrates even faster into the core of the product. The result is the shortened baking time and undried surface of the product.
The used conveyor is also one of the interesting things. The conveyor consists of cast iron plates 160mm wide with high thermal accumulating feature. Each upper side of single plate is perforated with dozens of thousand small holes and thus it creates unique pattern on bottom side of the baked bread. The integration of new system for heat transfer and baking on cast iron plates made possible keeping high quality and performance.
