Active walls
First Claim
1. A powder distribution device for transporting and mixing of powder with a gas comprisinga distribution member body forming a connection between a source of fine powder and a discharge opening, whereby the distribution member body comprises a porous body having a first inlet portion and an outlet portion for a stream of a first gas mixed with the fine powder, the porous body being surrounded by a second gas, which when creating a positive pressure gradient between outer and inner regions of said distribution member body the surrounding second gas will leak through the porous body of the distribution member body, thereby preventing powder particles from sticking to the inside of the distribution member.
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Accused Products
Abstract
A powder distribution device for transporting and mixing a fine powder with a gas is disclosed. The device presents a distribution member forming a connection between a source of fine powder and a discharge opening. The distribution member has a first inlet portion (10) and an outlet portion (12) for a stream of a first gas (1) mixed with the fine powder. The main body of the distribution member constitutes a porous body portion (16) being surrounded by a second gas (2). If a pressure gradient is created between the second gas (2) and the first gas (1), i.e. the first gas (1) being at a slightly lower pressure, the second gas (2) will leak trough the porous body (16) and thereby preventing powder, in the mix of the first gas and fine powder, from sticking or clogging within the distribution member, which thereby forms an active non-sticking wall relative to of the fine powder.
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Citations
8 Claims
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1. A powder distribution device for transporting and mixing of powder with a gas comprising
a distribution member body forming a connection between a source of fine powder and a discharge opening, whereby the distribution member body comprises a porous body having a first inlet portion and an outlet portion for a stream of a first gas mixed with the fine powder, the porous body being surrounded by a second gas, which when creating a positive pressure gradient between outer and inner regions of said distribution member body the surrounding second gas will leak through the porous body of the distribution member body, thereby preventing powder particles from sticking to the inside of the distribution member.
Specification