U-shaped flame low-nitric-oxide combustor for high-temperature hearth

Abstract

The invention discloses a U-shaped flame low-nitric-oxide combustor for a high-temperature hearth. A combustor steel structure body and an air and fuel gas mixing brazier brick are included. The U-shaped flame low-nitric-oxide combustor is characterized in that the brazier brick is a square rectangular brazier brick with the uneven wall thickness; the combustor steel structure body comprises an air distributor, an air channel and a fuel gas pipeline, and a flame stabilizing cover and an incandescent light are further included; the fuel gas pipeline comprises a fuel gas gathering pipe, an innergas gun and an outer gas gun, and five fuel gas branch pipes are designed on the gathering pipe; and a first-level gas sprayer is arranged on the top of the inner gas gun, and a second-level gas sprayer is arranged on the top of the outer gas gun. According to the U-shaped flame low-nitric-oxide combustor, in the combustion environment where the hearth temperature of a steam overheating furnace,an ethylene cracking furnace and the like exceeds 1,000 DEG C, through furnace wall local high temperature restraining, the flame dividing technology, thick and thin combustion and other technologies,generation of nitric oxide is restrained, and the emission of the nitric oxide in the environment where the hearth temperature exceeds 1,000 DEG C is lower than 80 mg / m<3>.

Description

technical field [0001] The invention relates to the technical field of combustion and environmental protection of tubular heating furnaces in the petroleum industry, in particular to a U-shaped flame low nitrogen oxide burner for a high-temperature furnace. Background technique [0002] In recent years, as the country pays more and more attention to environmental protection, the emission requirements for the petrochemical industry are getting higher and higher. Nitrogen oxides and sulfides are the main air pollution emissions in petrochemical heating furnaces. Traditional low-nitrogen oxide burners can basically meet the national emission requirements when the furnace temperature of the heating furnace is below 800 °C. However, when faced with combustion environments such as steam superheating furnaces and ethylene cracking furnaces, where the furnace temperature exceeds 1000°C, both traditional flat flame burners and wall flame burners have the problem of excessive nitrogen...

AI Technical Summary

Problems solved by technology

However, when faced with combustion environments such as steam superheating furnaces and ethylene cracking furnaces, where the furnace temperature exceeds 1000 °C, both the traditional flat flame burner and the wall flame burner have the problem of excessive nitrogen oxide emissions

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