Manufacturing method and application of fly-ash-based aircraft tail flame infrared suppression material

Abstract

The invention relates to a manufacturing method and application of a fly-ash-based aircraft tail flame infrared suppression material. The manufacturing method comprises the steps of S1, manufacturing an N-TiO2 composite material; S2, pretreating fly ash, mixing the pretreated fly ash with an NaOH solid, and then conducting high-temperature calcination to obtain alkali-molten ash; S3, adding deionized water into the N-TiO2 composite material and the alkali-molten ash, mixing the materials, and then conducting aging operation; and S4, crystallizing, filtering, washing and drying the aged materials to obtain the fly-ash-based aircraft tail flame infrared suppression material. The material manufactured according to the manufacturing method realizes the suppression on infrared radiation of a tail flame of an aircraft. A particle spraying pipe is designed to spray particles towards the center of the tail flame, and therefore the zeolite particles and the tail flame gas can be fully mixed, the high-emissivity radiation gas of the tail flame is adsorbed by utilizing the high adsorbability of the particles, the gas radiation characteristic of the tail flame is changed, the purpose that the radiation wave band is located outside the detection range is achieved, and the uncombusted combustible gas is subjected to catalytic oxidation through illumination loaded titanium dioxide to prevent recombustion.

Description

technical field [0001] The invention relates to a preparation method and application of a fly ash-based aircraft tail flame infrared suppression material, belonging to the technical field of materials. Background technique [0002] Fly ash is the pulverized coal of a thermal power plant that is burned in a suspended state to form fine droplets, which are rapidly cooled to form fine particles when passing through the furnace tail, and then collected by a dust collector to obtain fly ash. As a kind of solid waste, fly ash has an annual output of 600-700 million tons, but its comprehensive utilization rate is not high. In order to realize its high-value utilization, fly ash is usually made into zeolite molecular sieves and used in various fields. [0003] TiO 2 As the most commonly used photocatalyst, it has the characteristics of relatively low price and good photocatalytic performance, but on the one hand, TiO 2 Visible light is not very active, so it is usually modified. T...

AI Technical Summary

Problems solved by technology

[0005] Traditional fly ash based zeolite / N-TiO 2 The preparation technology of composite materials needs to be loaded on after a series of operation steps after synthesizing zeolite molecular sieve, the cost is high and the operation steps are complicated; the traditional raw materials are usually chemical reagents as the source of silicon and aluminum, which has a certain cost; fly ash The use value in the application field is not high; the infrared radiation suppression method and the materials used for the aircraft plume have little research on the arrangement of particles, and there are few reference materials for structural design optimization. The research and evaluation indicators for particle materials are relatively single. The analysis method is simple, the overall development is relatively slow, and the cost of infrared suppression materials is relatively high

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