Spray guns for glass kiln and glass kiln combustion method based on spray guns

Abstract

The invention provides spray guns for a glass kiln and a glass kiln combustion method based on the spray guns. The spray guns are arranged at the two sides of the glass kiln and are communicated withan internal combustion area; each spray gun includes a gun body and a adjusting rod assembly, each gun body includes a gun chamber, an outer pipe and an inner pipe, one end of each gun chamber is provided with an opening, the outer pipes extend into and are fixed to the openings of the gun chambers, and the inner pipes penetrate through the outer pipes and extend into the gun chambers, the adjusting rod assemblies are slidably mounted on the inner pipes in a sleeving mode and extend out of the tail portions of the gun chambers, and a fuel inlet is formed in each gun body and is communicated with the interior of the corresponding gun chamber. According to the spray guns for the glass kiln and the glass kiln combustion method based on the spray guns, by pushing and pulling the adjusting rodassemblies, adjusting pistons slide in the gun chambers along the inner pipes, and therefore the purposes of changing the fuel spraying speed and adjusting the flame length are achieved; the purpose is achieved that flame ends alternately reach a specific combustion area, the situation is avoided that a middle combustion area is heated continually, and the discharging concentration and total discharging amount of NOx in glass kiln exhaust gas are obviously reduced. The spray guns for the glass kiln and the glass kiln combustion method based on the spray guns are easy to apply and popularize inthe field of all kinds of combustion kilns which use air for supporting combustion.

Description

technical field [0001] The invention belongs to the technical field of glass manufacturing, and relates to a glass kiln combustion technology, in particular to a spray gun for a glass kiln with low cost, simple process, environmental protection and high efficiency, and a glass kiln combustion method based on the spray gun. Background technique [0002] The glass industry is a traditional energy-consuming industry, and a large amount of SO will be produced during the combustion process. 2 , NO X As well as harmful substances such as dust, it is easy to form acid rain and cause environmental pollution when discharged into the atmosphere. Ordinary float glass furnace with air as combustion medium, NO x The output is as high as 1800~3300mg / Nm 3 , SO 2 Up to 2000~6000mg / Nm 3 , the cost of flue gas treatment is high; at the same time, due to the relatively rough production methods of domestic production lines, the energy consumption is relatively high compared with foreign pr...

AI Technical Summary

Problems solved by technology

It can be seen that the flames generated by the injection of fuel from the combustion guns 4 on both sides overlap in area III and area IV, which causes the air in area III and area IV and the top of the glass furnace 2 to be continuously heated, and the temperature rises sharply. Nitrogen and oxygen in the regional space air react at high temperature to form nitrogen oxides (NO X ) is greatly increased, which eventually leads to a significant increase in the concentration and total emission of nitrogen oxides in the flue gas of glass kiln 2

[0004] Currently, glass kiln flue gas NO X The post-treatment method to reduce the emission of nitrogen oxides, that is, the NO in the flue gas of the glass kiln X Treat with physical and / or chemical means to reduce NO X content, the most commonly used methods are Selective Catalytic Reduction (SCR) and Selective Non-Catalytic Reduction (SNCR). There are problems such as ammonia leakage, catalyst poisoning, and secondary pollution.

In addition, the long-term adoption of this post-treatment method will make the cost of glass furnace flue gas treatment remain high, which is difficult for glass companies to bear, thus seriously affecting the product competitiveness of glass manufacturers

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