Lens temperature refractory observation holes in the combustor of a gas burner or bad tone for fire work is more important. Gas combustion is good or bad, except by excess exhaust gas analyzer calculates the coefficient to determine, but usually more is to visually observe the flame, the gas and air with the judgment is appropriate, whether the "short circuit", for cracks burner nozzle Have Dropped and brick gas path without leakage, etc., based on experience, when burning oven gas, in the case of normal coke, ovens during the day to see the rice yellow, fire nozzle hole away from the cycle of fire road, the flame was slender torch-like, slightly white; the white light when night observation, fire circulation holes near the mouth of the fire road, full of fire and flue gas mixing. When the air much gas is low, the flame off, observed during the day is bright white glare; less gas when the air a long time, the flame dark smoke; when the air and gas are less so, compared with the same number of fire lanes, which are small flame; If the air and gas are more, compared with the same number of fire road, the flame larger. In order to determine the flame, in addition to observe updraft flame, it must also observe the fall colors stream at the bottom to determine the temperature level. When heated with a blast furnace gas, the combustion flame is blue and transparent, it is difficult to accurately grasp the situation by observing the flame burning. Therefore, in order to analyze the exhaust air coefficient combustion as the primary means of inspection. Observe the flame mainly to see the location of the flame. Since in most cases it is more than the amount of gas than air, and therefore not in the middle of a normal flame but tend to air oblique crossing. When the mixed gas, the flame position with the mixing ratio of the size vary, mixing ratio, the more biased gas oblique crossing. If the flame too much biased air oblique crossing then the air less gas and more; if biased gas oblique crossing the opposite. When the temperature is low, the blue flame seen more clearly, the higher the temperature the more obvious. This is available from two obliquely crossing to determine the depth of color, which is darker oblique crossing large amount of gas; also available from path of fire to determine the degree of opacity, normal clear not mix, the more turbid, the amount of gas more. When excessive amount of gas, the fire hole out from watching the blue flames. Relationship furnace brick color and temperature range: about 600 ℃ dark red, can be seen at night from about 700 ℃ dark red, can be seen at night from about 800 ℃ about 900 ℃ deep cherry red cherry red cherry red light about 1000 ℃ about 1100 ℃ dark orange about 1200 ℃ bright orange about 1300 ℃ orange-white about 1400 ℃ dazzling white Name: product launches - high pressure Glass Description: Glass composition selection Li2O-Al2O3-SiO2 system that uses rolling production, with high transparency, suitable chemical steel, such as Features. This kind of glass and steel bending strength after treatment up to 500MPa, and has good thermal stability, it is a typical high temperature resistance, high-voltage products, and erosion has good acid and alkali capacity, is an industrial endoscope, level meter, the ideal window material. High temperature applications performance remained stable (temperature <900 ℃), suitable as high temperature and pressure vessels, piping, instrumentation, high-temperature furnace observation window, in the fields of electric power, petroleum, chemical, pharmaceutical, scientific experiments and other widely used.