Method for changing decomposition process of ammonium perchlorate to remove peculiar smell during setting off of cold light firework

Abstract

The invention discloses a method for changing a decomposition process of ammonium perchlorate to remove a peculiar smell during setting off of a cold light firework. According to the method, one substance selected from a transition metal (such as Ni and Cu), a transition metal oxide (such as Fe2O3, Co2O3, NiO and CuO) and a transition metal composite oxide (such as MnFe2O4 and CoCr2O4) is used as a functional additive, 2-5% (mass percentage) of the functional additive is mixed with the ammonium perchlorate which is crushed to 500 mesh, the mixture is fully wetted by water spraying, a sieve of 80-120 mesh is used for sieving and granulation, and then a composite particle comprising the functional additive and the ammonium perchlorate is prepared by drying. The composite particle as an oxidizing agent is used with components such as nitrocotton, titanium powder and the like to prepare the cold light firework according to a conventional formula and production technology of the cold light firework. When the cold light firework is set off, no peculiar smell may be smelt by a nose, no peculiar smell component may be detected by an infrared remote sensing spectrometer, the peculiar smell during setting off of the cold light firework can be thoroughly removed, and the principle of removing of the peculiar smell is that the functional additive changes the decomposition process of the ammonium perchlorate.

Description

technical field [0001] The invention relates to the field of luminescent fireworks, in particular to a method for changing the decomposition process of ammonium perchlorate to eliminate the peculiar smell of luminescent fireworks. Background technique [0002] Cold light fireworks, also known as indoor fireworks, are a new type of civilian entertainment pyrotechnic products developed in recent years. They are high-end products among various fireworks products, with high technical content, good safety, and strong ornamental value. They are suitable for more Occasion discharge and other characteristics, the market prospect is very broad. [0003] The formula components of cold light fireworks generally include oxidant (ammonium perchlorate), combustible agent (nitrocellulose), metal powder (titanium powder), etc. After ignition, ammonium perchlorate first decomposes to release heat, producing by-products and oxygen, oxygen Combustion reaction with combustible agent, release m...

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Problems solved by technology

[0004] Because the by-products produced during the decomposition of ammonium perchlorate contain NH 3 (g), Cl 2 (g) and HCl(g), forming obvious throat-piercing, pungent and uncomfortable odors in the air, seriously polluting the environment, endangering human health, and restricting the development and use of this product

At present, there are methods for eliminating peculiar smell: Zhang Youshan covers and weakens the peculiar smell of luminescent fireworks by adding fragrance components to cover up and weaken the peculiar smell of cold light fireworks. In the case of a small amount of discharge, although there is a certain effect of covering peculiar smell, the peculiar smell component still exists, although it is not smellable Perception, but it will still cause respiratory damage to the personnel at the scene of setting off, and cause environmental pollution. In addition, the salt in the solid phase component and the neutralization effect of the generated HCl gas are also very limited (Zhang Youshan, "A luminescent fireworks deodorant Production method”, China, 200810030448.2 (2009))

[0005] The above method does not fundamentally eliminate the odorous components produced when the cold light fireworks are set off, but only plays a role in covering the odor, the effect is very limited, and it does not eliminate the pollution of the odorous components to the environment and the damage to the human body, and the addition of too many inert components It will also affect the viewing effect when burning

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