Dear onyxgaze,

Pneumatic conveying loves materials that flow like water.

The set up of such a pneumatic conveying system depends on the project conditions.

However, there are a number of solutions for various situations.

If you describe the particle size, conveying rate and application conditions, the forum members will certainly come up with suggestions.

Have a nice day

Teus ■

Originally Posted by onyxgaze

We are presently using screw conveyor which discharges into a redler with an upward incline.

Interesting, I've know quite a few such arrangements work with fine powders that can fluidise? Who supplied the 'redler' (remembering that Redler is registered trade mark) ■

Originally Posted by onyxgaze

Hi,

We have an application wherein we have de-oiled Spent Bleaching Earth which is to be conveyed.

This material is finer than talcum powder and is at almost 80-90 degC.

WHat would be the correct method of conveying such material?

We are presently using screw conveyor which discharges into a redler with an upward incline.

Both do not work very well since the powder has a tendency to flow like water.

Thanks in advance.

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A diapragm pump can and will move powders easily and their are many manufacturers including Warren Rupp, Wilden, and Ingersoll Rand.

These pumps use single or double diapragm pumps to move powders with ease reducing dust and handling problems.

Here are a few links;

warrenrupp.com

wildenpump.com

ingersollrand.com

lzaharis ■

Dear onyxgaze,

You have not described the problems, which you experience with the conveying of the bleach with the screw and the chain conveyor.

However, I assume it is related to irregular rates, due to the fluidizability of the bleach, causing volumetric filling problems in the screw and flow back in the inclined chain conveyor.

The capacity of 50 tons/hr # 2.1 tons/hr # 0.58 kg/sec # 1.16 dm3/sec is not much.

Also assuming that the transport distance is rather short, a pneumatic conveying system, designed for a very low pressure could work with a solid conveying eductor.

Have a look at: http://www.foxvalve.com/iindex2.html

The eductor creates a slight under pressure at the outlet of the feeding screw and thereby improves the functioning of the screw.

The receiving hopper needs to be closed and equipped with a self cleaning de-dusting filter with fan, pressure safety valve and level-testers.

A blow pot system is also an option, but probably more expensive.

Ask a quotation from a respectable vendor.

Success

Teus ■