Research On Dust-Settling Technology By Self-Inhale Air Circumvolve Atomization Sprayer

For many years, the work environment are not good and the dust harm has been serious in our country.And every year the country have as much as 10 million Yuan direct economic losses because of pneumocons-is.Our country's pneumoconiosis harms are not only its sick the population, the disease incidence rate, but also its growth scope which takes the first place of the world.Although exsiting research about dust production mechanism and promotion of dust-settling Technology have done some thing to prevent dust pollution.but dust pollution problem has not been resolved.So while we are using exsiting technology ,wo have to study new dust-settling technology. Dust-settling work relates environment improvement, safety and the health of the people, the enlightened production, production cost reduction,and a smooth development production.The work is extremely significant.This article uses the means which unifies the theory and the experiment. Firstly ,we make research to the sprayer atomization mechanism, two phasecurrents hydromechanics theory, the atomization model, the design basis, the dust-settling principle,and dust removal efficiency influence factor.Secondly,in this article, on the basis of the past research, we used the basic theory of jet pump and venturitube to design several experiment models with different inside structure data, then we used the research method of orthogonal experimentation with the model to study the self-inhale air circumvolve atomization sprayer's structure parameters affect the effective range, jet angel , SMD(sauter mean diameter) and inhaled air quantity. We found the best structure parameters to have higher effective range, largerjet angle,lower SMD , inhaled air quantity with the same hydraulic quantity .Then we conducted the laboratory experiment to study sprayer.Through the orthogonal table experiment ,we found that when hydraulic pressure is 13 MPa, the diffuse angle is 30°,and the distance of larynx mouth is 48mm, we got the best matching of the self-inhale air atomization circumvolve sprayer's effective range, jet angle, inhaled air quantity and the effect of lower SMD with the same hydraulic quantity. Through experiment of the pressure discharge characteristic, the atomization characteristic experiment ,the atomization characteristics test fitting and the survey about atomizationfield work site,we obtained the sprayer characteristic parameters.We made some contrast experimentation with normal sprayer and self-inhale air circumvolve atomization sprayer,for example, experiment about air velocity distribution with different sprayer outlet section, overall and and the stage dust-settling efficiency and performance contrast.We found that air velocity distribution of self-inhale air circumvolve atomization sprayer is evener than incere cone sprayer at same sprayer outlet section; overall dust-settling efficiency of the two sprayer is similar,but breath dust-settling efficiency of self-inhale is better.Also we found SMD of self-inhale value is lower , and its effective range, jet angle is more or less, the research has its meaning.At last,we use fluent software to do numerical simulation research about flow field distribution , mean SMD of the droplet at the same sprayer outlet section, and droplet velocity distribution of normal sprayer and self-inhale air circumvolve atomization sprayer.We found that mean SMD of self-inhale air circumvolve atomization sprayer is lower than normal sprayer at the same sprayer outlet section; droplet velocity distribution with the same outlet section of self-inhale air circumvolve atomization sprayer is evener than incere cone sprayer.