Spray drying gun head assembly

Abstract

The invention provides a spray drying gun head assembly which comprises a spraying nozzle fixing head, an adjusting ring, an adjusting cover and a spraying nozzle. The spraying nozzle comprises a barrel and a convex extending ring, the convex extending ring is provided with a plurality of rotational flow channels, a through hole is formed in the bottom of the adjusting cover, and a liquid inlet and an air inlet are formed in the side portion of the spraying nozzle fixing head; a first cavity and a second cavity which are through are formed inside the spraying nozzle fixing head, the liquid inlet is communicated with the first cavity, the air inlet is communicated with the second cavity, and a radial shrinkage part and a spraying pipe are formed in the tail end of the barrel; the spraying pipe penetrates the through hole, and an annular gap is formed between the spraying pipe and the through hole; and a reverse stopping device is arranged in the first cavity to prevent back flow of the liquid to the liquid inlet. In the spray drying gun head assembly, the reverse stopping device is arranged in a liquid conveying channel, and therefore the liquid and air mixing efficiency is improved, air can be effectively prevented from reversely flowing into the liquid channel, and the atomization effect is improved.

Description

technical field [0001] The invention relates to the field of spray drying equipment, in particular to a spray drying nozzle assembly. Background technique [0002] The spray drying equipment uses the pressure of the high-pressure pump to atomize the solution or slurry material into fine droplets, so that the surface area is significantly increased, and it can be quickly dried by sufficient heat exchange with hot air, so as to obtain powder or fine particle products. The spray drying gun is an important accessory in the spray drying equipment. [0003] A spray drying gun head must be assembled in the spray drying gun to atomize the liquid material. Due to the influence of factors such as high salt content and high viscosity of the material in the actual use of the existing spray drying gun, the nozzle is prone to be blocked by high temperature coking and the droplet is relatively large (generally, the diameter of the droplet is between 20 ~ 80um), at the same time, the exis...

AI Technical Summary

Problems solved by technology

Due to the influence of factors such as high salt content and high viscosity of the material in the actual use of the existing spray drying gun, the nozzle is prone to be blocked by high temperature coking and the droplet is relatively large (generally, the diameter of the droplet is between 20 ~ 80um), at the same time, the existing atomization is insufficient, and it is easy to produce linear flow and other phenomena; at the same time, the existing spray drying gun is easy to exceed the standard due to the moisture content, and the heat exchange between the atomized material liquid and the hot air is not sufficient.

More importantly, when the liquid and gas are mixed, due to the change of the internal pressure of the atomization drying tower, the gas may be reversed to enter the liquid delivery channel, and this gas backflow phenomenon will lead to the reduction of the spray drying effect

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