Chamber Furnaces N(B) .. BO for Processes with High Evaporation Rates of Organics or for thermal cleaning by incineration
As an element of the safety system, the furnace chamber is constantly purged with fresh air during the process.
Function and equipment
The chamber furnaces of the series N .. BO (electrically heated) and NB .. BO (gas-fired) are designed for thermal treatment of products that release flammable gas mixtures when heated or that are themselves flammable but are not damaged by an uncontrolled rise in temperature that may occur during the process. Processes where the product or impurities are incinerated by ignition can also be carried out safely in these chamber furnaces.
Examples include residual dewaxing of molds or thermal treatment of catalytic converters to remove soot or fuel residues. Undesired organic components can be incinerated at temperatures up to 800 °C. The introduction of volatile organic compounds, such as solvents or substances that form flammable atmospheres below 80 °C is not permitted. Nabertherm offers other furnace concepts for the respective processes and will be happy to advise you.
The chamber furnaces are electrically heated or gas-fired. As an element of the safety system, the furnace chamber is constantly purged with fresh air during the process. The occurring exhaust gases are removed from the furnace via an exhaust air outlet with motor-driven flap. To ensure safe operation, the furnace door is locked when the program is started and can be opened only when the temperature has fallen below a defined value at the end of the process. The electrically heated chamber furnaces N .. BO are recommended for processes that rely on good temperature control via the heating program. For safety reasons, the furnace is then equipped with an integrated pilot burner to ignite the flammable components in the furnace atmosphere. This prevents an accumulation of flammable components and enables safe burning.
In gas-fired furnaces, this task is performed by the gas burner. In case of burner malfunctions or gas shortage the process is stopped. The gas-fired chamber furnaces NB .. BO, where the burner flame is directly in the furnace chamber, are suitable for simple burn-out or ashing processes where temperature accuracy is not an important aspect.
- Tmax 1000 °C
- Exclusive use of insulation materials without categorization according to EC Regulation No 1272/2008 (CLP). This explicitly means that alumino silicate wool, also known as “refractory ceramic fiber” (RCF), which is classified and possibly carcinogenic, is not used.
- Electrically heated or gas-fired
- 300 liters or 650 liters furnace chamber, other sizes on request
- Stainless steel exhaust flue
- Automatic temperature control
- Passive safety system BO with
- Monitored gas-fired pilot flame (natural gas or LPG)
- Monitored fresh air
- Fresh air fan to dilute the furnace atmosphere during burn-off and for cooling after the process
Switchgear mounted on the side of the furnace or alternatively installed in a separate upright cabinet (depending on furnace model) - Over-temperature limiter with adjustable cutout temperature as temperature limiter to protect the furnace and load
- HiProSystems H1700, including Siemens PLC control system and 7” touchpanel as operating interface
- Defined application within the constraints of the operating instructions
Further products
Catalog
A complete overview of our extensive range from the small laboratory furnace up to a combi furnace system for debinding and sintering in one process can be found in our catalog “Advanced Materials”.