Research on Energy-saving Approach of Glass Furnace

The energy consumption of glass melting furnaces accounts for 70% of the total energy consumption of glass plants. In the past decade or so, many energy-saving measures have been taken, involving the formulation of glass frits, heating systems, combustion systems, kiln insulation, waste heat utilization, and job control. Energy consumption has dropped significantly.

1 kiln heat insulation The glass melting furnace has large heat dissipation area, high appearance and high temperature. Its heat dissipation children are about 20~30% of the total heat, especially after using heavy oil as fuel and using fused refractories. After the kiln heat insulation, the fuel saving is 15~20%, and the flame shizhi is 20~30°C.
Insulation sites should be based on the principle of “guarantee for security” and expand the insulation surface as much as possible. However, the kiln body insulation should pay attention to the following issues.
The pool wall of 200~300mm below the 1 liquid surface line can not keep warm, and it needs strong cooling;
2 For leakproof material, brick joints should be allowed when the wall is insulated;
8 When the bottom of the pool is heated, the quality of the furnace must be guaranteed, and the floating bricks and leakage materials must be strictly prevented.
4 When the wall is warm, the steel structure should be exposed to avoid affecting the strength;
5 Insulation of the urn and breast wall can only be carried out when the temperature of the kiln is greater than 700°C. An insulating brick can be temporarily placed before the temperature of 700°C so that the silicon bricks can be evenly expanded at both ends.

2 Expand the temperature of the flue gas leaving the furnace kiln flame space in the regenerator glass melting furnace can reach 1400 °C or more, the taken away heat energy generally accounts for 50 - 70% of the heat supply in the kiln, and the waste heat is recovered on the glass furnace Has special significance. In the past 10 years, the refrigerated chamber lattice brick occupied by unit melting area of ​​the glass tank furnace has reached a heating area of ​​20m2/m2. Individual furnaces up to 47m2/m2'. The top air temperature is also increased from 1000°C to 1240-1300°C.
The comprehensive insulation of the melting furnace and the expansion of the regenerator are the main technical measures for the energy saving of the glass melting furnace.

3 Use heavy oil as fuel Glass melting mainly depends on radiation heating, heavy oil flame heat radiation is very suitable for melting process requirements. As the country has increased the supply of glass melter fuel oil, the oil-fired melting kiln has developed rapidly in the past 10 years and has achieved remarkable results in reducing fuel consumption and reducing pollution.

4 The use of high-quality refractories and rationalization of the use of fused corundum brick cementing pool, and attach importance to the overall material of the furnace kiln, furnace life can be extended for more than 1 year.

5 Perfection and Development of Furnaces The thermal process is controlled automatically by the automatic control of the thermal parameters of the furnace. The development of the school over the past 10 years has improved the operating level of the furnace.

6 Auxiliary electrofusion For the melting kiln whose product is changeable and whose fuel quality is unstable, use the electrofusion method to adjust the production capacity of the kiln, so that the production capacity of the kiln is often at full load.

(7) Strengthen pre-melting, strengthen homogenization Strengthen the pre-melting of batch materials, and control the cooperation.

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