A. Clarification and decompression technology
Decompression clarification is a method of reducing the pressure on the glass liquid to make the bubbles remaining in the glass liquid grow, float up quickly and be discharged. The advantages of decompression clarification are significant energy saving, which can reduce energy consumption by 30%; energy consumption is reduced, the amount of clarifier is reduced, and the emission of harmful gases such as NOx and SO2 is reduced; the melting rate of the melting furnace cycle is significantly improved.
B. Oxygen combustion technology
There are two main ways to apply oxyfuel combustion in glass melting furnaces: oxyfuel combustion and oxyfuel melting.
(1.) Oxygen combustion
Oxygen combustion glass melting furnace is a furnace that uses pure oxygen for combustion in the entire melting section. Its advantages are: ① Improve combustion efficiency and save 25%-55% of energy; Significant pollution reduction: NO, emissions are reduced by more than 80%, and dust emissions are reduced by 70%-80%; Low investment cost, simple furnace structure, small footprint, no heat storage chamber, combustion fan and denitrification device, etc.; Can improve the melting quality of glass: No reversal of combustion, more stable temperature and atmosphere distribution, help reduce streaks and small bubbles, improve glass quality; Short furnace construction time, less maintenance, long furnace life.
(2.) All-oxygen melting glass furnace
All-oxygen melting glass furnace is to use pure oxygen spray gun to heat the hot spots of the furnace or 0# small furnace (flat glass furnace) and other specific parts to promote glass melting and clarification. Its advantages are: it can increase the discharge volume by 5%~15%; improve thermal efficiency and save energy by 2%~10%; help reduce bubbles and streaks and improve glass quality; reduce pollution emissions by 5%~20%; overcome the limitations of the heat storage chamber and extend the life of the furnace.
C. Pool bottom bubbling technology
(1.) With the development of bubbling technology, the use of precision-controlled low-frequency bubbling (0-8/min) technology has become the current development trend of bubbling. It can achieve the usual bubbling effect and has the following outstanding advantages:
(2.) Promote the homogenization of glass liquid, prevent the batch material pile from entering the clarification area, improve the uniformity of glass liquid, and increase the discharge volume.
It improves the thermal efficiency of the melting furnace, saves about 5% of fuel, and shortens the material change time.
(3.) It is possible to precisely control the frequency of bubbling and independently adjust the size of bubbles. The quantification technology of bubbling frequency and bubble size is conducive to controlling and stabilizing the convection system of glass liquid, without generating secondary bubbles (due to independent bubbling and low frequency) and improving the quality of glass liquid. The loss of refractory materials is minimized by very low bubbling frequency.
(4.) Low-frequency and large bubbling and specially designed anti-clogging bubbling tubes ensure good homogenization effect without the risk of clogging of the usual bubbler.
D. Electric boosting heat dam technology
The purpose of the electric boosting heat dam is to use electric energy to create beneficial convection in the glass liquid. In this way, the electric boosting system not only adds energy to the melting process, but also effectively controls the glass liquid convection system, which is beneficial to the overall operation of the kiln, improves the uniformity of the glass liquid, prevents unmelted or unclarified glass liquid from reaching the flow hole too early, and helps improve the heat conduction from the large arch space at the top of the kiln.
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