The Study of Applying the Microbubble Column System for Dust Removal Control in Livestock Buildings
Date Issued
2008
Date
2008
Author(s)
Lu, Yin-Chieh
Abstract
This research is applying the simple microbubble generated device and bubble column system, join proper Pyroligneous acid to dust Control in Livestock Buildings.ccording to the result of minimizing bubble size，adding Pyroligneous acid can influences bubble size more than 80%,but the coverage of the other factors(the type of the device、Area of air vent、Ａir vent number、Ａir vent location、Ａngle of the device)and it’s interaction are just about 20%~40% .In addition, Ａngle of the device and adding Pyroligneous acid can also influence 76.1% and 70.2% spreading ability of bubbles. And then add 2%、1%、0.8%、0.5%、0.2%、0.1% of Pyroligneous acid to water. Test and show, concentration between 0.1%~0.5%、pH between 6.39~4.55 can reach its top performance.ccording to the result of device testing, liquid temperature has a equivalent distribution in the bubble column, and it is the most important factor of the system. Therefore, add 3.2g dust when system reach 25℃、30℃、35℃、40℃、45℃. Results show that the system has two stages reactions in accordance with tiny dust concentration. In the preceding stage, ability of flotation can be estimated by liquid temperature, and reach its top and bottom when 30℃ and 42.5℃ separately. On the other hand, the later stage’s ability of flotation can be estimated by the tiny dust concentration at the end of the first stage, and the flotation ability is only 2%~8% of the preceding stage. The results also show that flotation efficiency (mg/s) can estimate flotation ability more precisely than multiple of condensation (1/min). Conjecturing that is because part of dust dissolved in the liquid and underestimated the multiple of condensation.
Subjects
microbubble column
froth flotation
pyroligneous acid
livestock building
dust remove
Type
thesis
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