Air fuel multi-layer three-dimensional grading low-nitrogen gas burner

Abstract

The invention discloses an air fuel multi-layer three-dimensional grading low-nitrogen gas burner. Four-stage combustion-supporting gas can be formed through a central air cylinder, an annular cavity between the central air cylinder and an inner rotational flow air cylinder, an annular cavity between the inner rotational flow air cylinder and an outer direct flow air outer cylinder, and an annular cavity between the outer direct flow air outer cylinder and an outer secondary air outer cylinder; gas fuel sprayed by the center fuel gun, an inner primary fuel gun, an outer primary fuel gun and a secondary fuel gun can be mixed with the four-stage combustion-supporting gas, on one hand, the mode that the whole burner is in an oxygen-deficient and outer-ring oxygen-enriched combustion mode in the center area of the combustion end can be achieved, and the gathering degree of fuel in the center area and the intense degree of combustion in the initial stage are reduced, so that the combustion temperature is reduced, and generation of thermal NOx is inhibited; and on the other hand, direct-flow air and rotational-flow air are arranged in the center while the fuel is diffused to the outer ring as much as possible for combustion, so that the flame mixing stability in the center area is guaranteed, the combustion efficiency is improved, and emission of nitric oxide is reduced.

Description

technical field [0001] The invention belongs to the technical field of ultra-low-nitrogen clean combustion, and relates to an air-fuel multi-layer three-dimensional graded low-nitrogen gas burner. Background technique [0002] In recent years, the demand and price of energy have been rising, while the supply of energy is relatively tight, and the problem of energy gap has become more and more obvious. At the same time, global environmental problems have become increasingly prominent, such as climate warming, acid rain and photochemical smog. Attention, at present, the world's energy supply mainly depends on fossil energy, and combustion is the main way of its energy conversion, which converts the chemical energy of the fuel into heat energy, and the energy obtained by burning fossil fuels accounts for more than 90% of the world's total energy consumption. The task of energy conservation and emission reduction is arduous. [0003] Gas fuel has the characteristics of high com...

AI Technical Summary

Problems solved by technology

At present, the burners using this gas fuel are still graded by traditional low-nitrogen technology, and the effect is not good.

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