A spray drying device

Abstract

The invention provides a fluid atomizing nozzle, a density measuring device with the nozzle and a drying device with the nozzle. According to the fluid atomizing nozzle, fluid enters the atomizing nozzle in the tangential direction of the side wall of the atomizing nozzle, the ratio of the upper diameter to the lower diameter of an inner cavity of the nozzle is increased, the methods that the rotating direction of the fluid is controlled, and the outlet diameters and number of single-hole sprayers on different atomizing nozzles, fluid pressure, measurement and the like are adjusted are adopted, and rotation of the fluid is improved. When angular momentums of multiple kinds of fluid are the same in size and opposite in direction, mixing among the fluid can be enhanced, the side effect that single fluid enters the inner cavity of the nozzle in the tangential direction can be avoided, and positive effects are generated for improving fuel combustion performance and driving force of rockets and jet aircrafts and on other occasions needing uniform atomizing density; when umbrella-shaped fog columns are needed, rotation of the multiple kinds of fluid can be controlled to be identical to achieve the effect of increasing the diameter of large particles. The effects that the needed minimum pressure is small and the fluid rotates at an ultra-high speed can be achieved without adding a rotating part.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and in particular relates to an atomizing nozzle with high efficiency, low resistance and multiplied rotational speed. Background technique [0002] Atomizing nozzles have a wide range of uses, and have many applications in industry, agriculture, national defense, etc., and are often key equipment. The current atomizing nozzle structure can be roughly divided into four categories according to the atomization method: ①Single-hole high-pressure direct spraying; ②Centrifugal atomizing nozzles, one is under high pressure, allowing the fluid 1 to generate radial rotation through an equal-diameter spiral channel Then mix and atomize with the fluid 2 coming straight through the axial direction, or directly let the fluid 1 enter the fluid mixing chamber along the small hole in the tangential direction of the side wall of the mixing chamber for rotating mixing and atomizing; ③Under high p...

AI Technical Summary

Problems solved by technology

Among them, ① the structure is the simplest, but the scope of application is narrow, the pressure loss is large, and the particle size distribution of "fog" is the widest; The radius is dozens of times of the nozzle radius so that after the fluid leaves the nozzle constraint, it still maintains a high rotational speed, and this factor will lead to a decrease in the density of the fog column axis

③Compared with ②, although the pressure loss is reduced, the limited number of gas outlets will definitely make the particle size distribution of the "fog" wider; ④Compared with ②, the applicable range is wider and the required pressure is smaller. The particle size distribution range of "fog" is mainly determined by the rotation speed of the turntable. The higher the rotation speed, the smaller the particles of the "fog" and the narrower the particle size distribution range. The disadvantage is that additional power equipment is required, especially when the rotation speed is high. The precision requirements are high, and there is also the problem of shaft sealing

[0003] To sum up, although the current centrifugal nozzle has certain advantages for low-viscosity fluids, it also has a disadvantage, that is, the rotation of the spray fluid is beneficial to mixing with other low-density fluids, but it is not conducive to the formation of "fog". Evenly distributed

And this will inevitably reduce its propulsion for rockets and jet aircraft

[0004] Secondly, there is no technical means to accurately measure the spray density of the nozzle in the prior art, resulting in a lack of comprehensive scientific basis for the evaluation of the nozzle performance

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