How to calculate the charged amount of powder in pneumatic conveying
? ? ?Inpneumatic conveyingIn order to better understand the conveying methods of materials with static electricity in pipelines, it is necessary to know the static electricity of materials in pipelines. Therefore, based on these, let the editor of Shandong Juheng introduce the charged amount of powders in pneumatic conveying
The charge capacity of the powder
1. The measurement of powder charge is shown in Figure 1. The powder particles flowing through fall between the plates, and the camera (shutter speed of 1/10s) captures the sinusoidal waveform motion trajectory of the particles from the side. Then, the static charge is calculated according to the following formula:
Figure 1
In the formula, e represents the static charge (x10-C);
????A - wavelength of sine wave (cm);?
????G - Gravity acceleration (cm/3);?
????F - Frequency of communication (Hz);?
????L - spacing between electrode plates (cm);?
????V - Actual AC voltage (V);?
????A - amplitude of sine waveform (cm);?
????m, --The mass of particles (g).
2. The charge and particle size of wheat flour increase with the increase of particle surface area, but there is a tendency towards saturation. In addition, the positive and negative charges are basically equal.?
Table 1 shows the charged amount of quartz powder when flying in several different material pipelines, as well as the charged amount of the pipes.
Table 1 Quartz powder flying and charged in different material pipelines
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