Solids conveying with multi-diameter piping circuit
AssigneeBraskem America, Inc.
InventorsShady Henry, Ronald Lutz
Life of this patent
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Abstract
A mixture of gas and solid particles are conveyed through a piping circuit connected between initial and terminal points. The gas is introduced at the initial point and the particles are introduced between the initial and terminal points. A diameter of the piping circuit increases downstream of where the particles are introduced, and a velocity of the gas is at least as great as a pick-up velocity of the particles at the point where the particles are introduced into the piping circuit. In addition to the above constraints, the piping circuit is sized so that total pressure losses due to flow in the piping circuit between the initial and terminal points are within a designated amount.
Claims8
A piping circuit for conveying particles comprising:
- a first segment comprising an intersection where particles dispersed in a first gas combine with a second gas form a mixture, a cross sectional area inside the first segment strategically sized so that when the mixture flows through the first segment the particles are at a velocity at least as great as a pick up velocity of the particles, the intersection comprising a junction where a first pipe carrying the first gas and the particles joins directly with a second pipe carrying the second gas so that the first gas and particles are introduced directly into a flow of the second gas within the second pipe;
- and
- a second segment comprising an upstream end in communication with the first segment, a terminal end distal from the upstream end, and a cross sectional area greater than the cross sectional area of the first segment and strategically sized so that when the mixture flows through the second segment the particles are at a velocity at least as great as a saltation velocity of the particles.
Dependencies are inferred from the claim text.