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Koji su faktori koji utiču na efekat atomizacije mlaznice za raspršivanje

Apr 10, 2022

Zapravo, efekat atomizacije mlaznice za raspršivanje vezan je za mnoge aspekte, a različiti oblici raspršivača utječu na njega različito, kao što su:


1. Raspršivač pod pritiskom


Kada se koristi mlaznica za raspršivanje pod pritiskom (direktna i centrifugalna) za izvođenje raspršivanja prašine, efikasnost uklanjanja prašine zavisi uglavnom od pritiska dovoda vode, a pritisak vode različitih veličina čestica je različit za određene prilike upotrebe. Što je veći pritisak sitnije prašine, to je veći pritisak. Visok pritisak dovoda vode ne može samo da dobije finu vodenu maglu čestica, već i da čestice vodene magle imaju veliku brzinu kretanja i veliki sadržaj vode u prostoru, što je veoma korisno za metodu smanjenja prašine zasnovanu na mehanizmu sudara. Prema stvarnoj disperziji čestica prašine i zahtjevima efikasnosti smanjenja prašine, pozivanjem na odgovarajuću krivu za odabir odgovarajućeg pritiska vode mogu se postići dobri rezultati i najbolja ekonomska korist. Zaključak je primjenjiv na svako radno mjesto gdje se raspršivač pod pritiskom koristi za raspršivanje i taloženje ugljene prašine.


2. Dvofazni raspršivač


① Influence of mixing tube diameter and length: the smaller inner diameter of mixing tube can increase the relative velocity of gas-liquid two phases, which is conducive to atomization, but it will affect the re aggregation of atomized particles. Because the mixing tube is too long and the gas energy loss is too much, the atomization of liquid flow will become worse; If the mixing tube is too short, the gas energy can not be fully utilized, resulting in insufficient atomization of liquid flow.


② Effect of nozzle: because reducing the outlet area will increase the outlet pressure drop, the acceleration of gas-liquid mixture is significantly enhanced, and the relative velocity of gas-liquid phase increases, which also makes the liquid phase break finer. However, the increase of outlet pressure drop will inevitably increase the pressure in the mixing pipe, resulting in the decrease of the relative velocity of gas-liquid two phases in the mixing pipe, which will make the atomization worse.


③ Relationship between gas-liquid ratio and atomized particle size: with the increase of gas-liquid ratio, the atomized particle size decreases. Therefore, increasing the gas-liquid ratio can increase the relative velocity of gas-liquid two phases and make the liquid film break finer. However, when the gas-liquid ratio increases to a certain extent, the change of particle size is not obvious.


④ Change of droplet concentration with gas-liquid ratio: with the increase of gas-liquid ratio, the particle concentration of water decreases, which is caused by the decrease of water mass fraction in air


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