Air distribution device for smoke and garbage incinerator

Abstract

The invention provides an air distribution device for smoke and a garbage incinerator. The air distribution device comprises at least two layers of spraying openings formed in a throat outlet of the incinerator, so that the smoke can be sprayed into the incinerator, wherein each layer is provided with multiple spraying openings. According to each two layers of vertically adjacent spraying openings, the spraying direction of the multiple spraying openings of one layer rotates clockwise in a hearth to form a tangent circle, the spraying direction of the multiple spraying openings of the other layer rotates anticlockwise in the hearth to form a tangent circle, and thus perturbation of the smoke near the throat of the incinerator is increased. According to the scheme, the low level of the oxygen content of the incinerator throat can be ensured while complete burning of CO is ensured, thus generation of NOx is restrained, uniformity of the section temperature field of the throat outlet of the incinerator can also be facilitated, and the possibility that high-temperature smoke gets close to a rear wall, and a large scale of coking is produced on the rear wall is avoided.

Description

technical field [0001] The invention relates to a flue gas air distribution device and a garbage incinerator. Background technique [0002] Waste incineration is one of the main ways to realize waste reduction, harmless and resourceful treatment. At present, garbage incineration has gradually become the main way to deal with urban domestic garbage. After modern incineration, the volume of garbage can generally be reduced by 80%-90%. At the same time, various pathogens can be eliminated, and harmful substances can be converted into harmless substances. resource utilization. [0003] An existing garbage incinerator includes a feed inlet, a feed grate, a grate for garbage incineration located in the furnace, a primary air supply system located at the lower part of the incinerator grate, and a secondary air supply system located at the throat of the incinerator. Secondary air supply system and slag outlet. The primary air is sent in from the air chamber at the bottom of the i...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned secondary air distribution technology mainly has the following disadvantages: First, in order to cause sufficient disturbance effects, the number of secondary air injection ports is large and the pipe diameter is small, which easily causes wear near the injection ports. If the injection speed is reduced, the In the process of violent combustion, it is very likely to cause coking and blockage of the injection port; moreover, due to the small injection port and high speed, the power consumption of the secondary fan of the power plant is relatively large, which is not economical; moreover, the local oxygen at the throat The content and temperature are usually high, which is likely to cause the violent generation of pollutant NOx; finally, the number of injection ports at the throat is large, which is not conducive to on-site processing, installation and maintenance

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