Method for gradient oxygen-increasing combustion supporting of glass melting furnace and special gradient oxygen-increasing combustion-supporting system

Abstract

The invention discloses a method for the gradient oxygen-increasing combustion supporting of a glass melting furnace and a special gradient oxygen-increasing combustion-supporting system. The system comprises an air separator; the system is characterized in that an oxygen collection tower is connected with an outlet end of the air separator through a pipeline, and an oxygen outlet of the oxygen collection tower is respectively connected with a low pressure distribution pipeline and a high pressure distribution pipeline which is connected with a tee joint reversing port through a tee joint distribution port which is connected in series by a pipeline; the end parts of the low pressure distribution pipeline and the high pressure distribution pipeline are connected with a regulating valve, a flowmeter and an oxygen combustion-supporting spray gun which are respectively communicated with one another; the oxygen combustion-supporting spray gun is assembled below a fire port which is formed on the side wall of the glass melting furnace and is matched and fixedly connected with a combustion spray gun which is fixedly assembled on the side wall of the original furnace; and oxygen with different pressures is respectively filled into an inner pipe and an outer pipe of the oxygen combustion-supporting spray gun on the bottom of a fuel spray gun, so that the flame temperature of the glass melting furnace is distributed in gradient, the unit glass energy consumption and NOx emission of the glass melting furnace can be effectively reduced, and the method and the system are suitable for being industrially popularized and applied.

Description

technical field [0001] The invention relates to a method for gradient oxygen increase and combustion support in a glass melting furnace and a special gradient oxygen increase combustion support system. The invention belongs to the field of furnace combustion method and equipment in the glass production process. Background technique [0002] Flat glass and its processed glass have become indispensable and important materials for the development of the national economy and the improvement of people's living standards. While the production capacity and quality of glass are continuously improving, the importance and urgency of energy saving and emission reduction in glass industry melting furnaces are also attracting increasing attention. [0003] NOx is an important pollutant that causes ozone and acid rain, and is one of the control indicators for glass factories in environmental protection regulations. Existing glass melting furnaces generally preheat the combustion air to ...

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Problems solved by technology

[0007] Oxygen-enriched combustion gradient oxygen-increasing technology has been applied at present. The oxygen-enriched gas produced by the single-stage rectification tower nitrogen production equipment of the float glass production line is used. The oxygen content in the oxygen-enriched gas is 33-35%, and the oxygen-enriched gas accounts for the total combustion air. The ratio is about 6%. Because the oxygen concentration and proportion are too low, the energy saving effect is not good. Although the method of preheating the oxygen-enriched gas is used, the method of increasing the initial temperature is used to improve the combustion effect; while the oxygen-enriched gas The preheating temperature should not be too high. If it is too high, the temperature in front of the oxygen-enriched spray gun will be high, the oxygen-enriched spray gun will be easily damaged, and the replacement operation will be difficult. In fact, it is also difficult to preheat the oxygen-enriched gas at a high temperature, so the actual application effect is not good. Good; at the same time, there is still a lot of nitrogen in the oxygen-enriched gas, which cannot reduce the NOx content in the flue gas, but increases it

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