Target Box
Dear Selvam,
Instead of designing and building a target box yourself, it will be more economical to buy an "off-the-shelf" target box. This item is available from several pneumatic conveying vendors. I can suggest a few names if you approach me off-line.
Regards,
A. T. Agarwal
Pneumatic Conveying Consulting LLC
email: polypcc@aol.com ■
Target Box
Mr. Selvam,
Unless you are concerned about particle breakage there is no reason to employ a target box. Conveying directly into the bin (through the roof using either 90 or 180-degree conveying bends) avoids particle-to-wall impaction and replaces it with particle-to-particle impaction, which is often a good trade-off.
You mentioned 50 Mt/h through a 150 mm pipeline which is optimistic at best. A realistic throughput for this pneumatic conveying system, be it dense-phase or dilute-phase, is closer to 20 Mt/h.
Dennis Hauch ■
Re: Target Box
Dear Selvem,
As Mr. Hauch has stated, target boxes are not a necessity in most installations but in many cases, they do serve a useful purpose. They can be fabricated locally much cheaper than you can buy one from a vendor. The designs are not complicated and if you e-mail me your fax number I would be happy to fax you some suggestions. ■
Target Box
Dear Selvam,
The following information may help you in your decision:
Target box is a colloquial name used for devices that assist separation of particulate solids from the gaseous stream by reducing their exit velocity. They work on the principle of direct impact or wall friction.
These devices can be a vertical impact plate, a pocket T, a short radius bend, a Vortex bend, a conical pyramid, or some other kind of a custom-designed unit. Their design and selection depend upon the physical and conveying properties of the solids.
Normally, these devices are installed on the top of a receiving bin or silo but sometimes they are installed inside the bins directly under the entering nozzle.
Regards,
A. T. Agarwal
Pneumatic Conveying Consulting Services
Email: polypcc@aol.com
Ph and Fax: 304 346 5125 ■
Target box
I am in the process of designing a system to pneumatically convey/transport limefines of -10mm size from a mobile tanker at ground level to the top of a storage tanker through pipeline at the rate of 50tph. The conveying pipe of 150mm dia is to be terminated at the top of the storage bunker for discharge of limefines through suitable "target box" at the top of the bunker. I am new to this area of designing. Can any body help me in designing /select a suitable target box for the case mentioned here? ■