Product  |  Description  |  Features
ggENOx, Enhanced Combustion Technology  ggENOx,
The Nitrogen oxide (NOx) production in thermal processes is one of the biggest problems at glass melting tanks. Rising environmental sensitiveness forces the local authorities to restrict the emission values of NOx. While the basic glass production methods are used since the beginning of glass melting, new challenges are issued by this economical and ecological boundary conditions.
The ggENOx system has been developed by glass global consulting with the aim to offer a low cost efficient NOx reduction system. This innovation is licensed exclusively to HORN for running as well as on new furnaces and fits environmental limits at low investment and simultaneous fuel cost reduction.
How does it work? 
The key in NOx reduction is to avoid temperature peaks and keep the local lambda low. The new ggENOx-Technology is based on an intelligent oxidizer supply system, which ensures complete combustion at very low excess oxygen concentrations. CO and NOx, produced former, are destroyed by controlled re-burning.
Specially designed lances / burners are installed at side wall of the furnace along with appropriate flow skid units including necessary controls. The lances / burners utilize natural gas, compressed air or oxygen, and are operated alternately with the furnace.
Together with the very low operating costs e.g. for compressed air - typically below 0.020 €/m³ - ggENOx is currently the most favorable system on the market to primary reduce NOx at regenerative end-port furnaces.
Depending on the individual conditions in the furnace different media volumes are required. The media volumes, depending on the furnace size, are between 80 and 150 Nm³/h. The exact design of the burners - the type of media, position and orientation – is determined by a CFD simulation of the furnace.
What can be reached? 
The ggENox-Technology reduces the NOx emission by up to 60% to values below 500 mg /Nm³ related to an oxygen concentration of 8% in the flue gas.
Figure 1: Flue gas composition measurement 
Due to the forced recirculation of the flame gases inside the tank hot-spots are reduced and the temperature is equalized. Because of the reduced peak temperature the furnace life time is expanded. The crown temperature above the batch is increasing and improves the heat transfer to the batch and results together with the reduction of preheated air volume flow in fuel saving of 2-3%. Additionally the heat transfer to the batch is increased by 4-10% due to the temperature increase above the batch and can be converted into a pull increase of 2.5-8%.
Because of the fuel consumption reduction the ggENOx application is amortized within 1-1½ years. A pull increase is resulting in a profit increase several times larger than the potential profit based on the fuel consumption reduction.
  • Quality increase 
  • Fuel cost reduction by 2 – 3% 
  • NOx emission reduction below 500 mg/Nm³ 
  • Low investment costs 
  • Very low operating costs 
  • Production increase by 2,5 – 8%

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