Slurry distributor, system and method for using same

Patent metadata

Field	Value
Publication number	US-9616591-B2
Application number	US-201113341209-A
Country	US
Kind code	B2
Filing date	Dec 30, 2011
Priority date	Dec 30, 2010
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A slurry distribution system can include a feed conduit and a distribution conduit in fluid communication therewith. The feed conduit can include a first feed inlet and a second feed inlet disposed in spaced relationship thereto. The distribution conduit can extend generally along a longitudinal axis and include an entry portion and a distribution outlet in fluid communication therewith. The entry portion is in fluid communication with the first and second feed inlets of the feed conduit. The distribution outlet extends a predetermined distance along a transverse axis, which is substantially perpendicular to the longitudinal axis. The slurry distribution system can be placed in fluid communication with a gypsum slurry mixer adapted to agitate water and calcined gypsum to form an aqueous calcined gypsum slurry.

First claim

What is claimed is:

1. A gypsum slurry mixing and dispensing assembly comprising:
a gypsum slurry mixer adapted to agitate water and calcined gypsum to form an aqueous calcined gypsum slurry, the gypsum slurry mixer including a housing and an agitator, the housing defining a mixing chamber, a water inlet, and a calcined gypsum inlet, the water inlet and the calcined gypsum inlet in communication with the mixing chamber, and the agitator rotatably mounted within the mixing chamber;
a slurry distributor in fluid communication with the gypsum slurry mixer, the slurry distributor including:
a first entry segment with a first feed inlet in fluid communication with the gypsum slurry mixer and adapted to receive a first flow of aqueous calcined gypsum slurry from the gypsum slurry mixer,
a second entry segment with a second feed inlet in spaced relationship to the first feed inlet, the second feed inlet in fluid communication with the gypsum slurry mixer and adapted to receive a second flow of aqueous calcined gypsum slurry from the gypsum slurry mixer, the first and second feed inlets each having an opening with a cross-sectional area, and
a distribution conduit extending generally along a longitudinal axis and including an entry portion and a distribution outlet in fluid communication with the entry portion, the entry portion in fluid communication with both the first and the second feed inlets, the distribution outlet extending a predetermined distance along a transverse axis, the transverse axis being substantially perpendicular to the longitudinal axis, the distribution outlet having an outlet opening with a cross-sectional area which is greater than the sum of the cross-sectional areas of the openings of the first and second feed inlets, the outlet opening having a width, along the transverse axis, and a height, along a vertical axis mutually perpendicular to the longitudinal axis and the transverse axis, the width-to-height ratio of the outlet opening being about 4 or more, and the distribution conduit adapted such that the first and second flows of aqueous calcined gypsum slurry discharge from the slurry distributor through the outlet opening of the distribution outlet.

2. The gypsum slurry mixing and dispensing assembly of claim 1 , wherein the width-to-height ratio of the outlet opening is in a range between 4 and 288.

3. The gypsum slurry mixing and dispensing assembly of claim 2 , wherein the first and second feed inlets and the first and second entry segments are disposed at a respective feed angle in a range up to about 135° with respect to the longitudinal axis.

4. The gypsum slurry mixing and dispensing assembly of claim 2 , further comprising:
a delivery conduit disposed between and in fluid communication with the gypsum slurry mixer and the slurry distributor, the delivery conduit including a main delivery trunk and first and second delivery branches;
a flow splitter joining the main delivery trunk and the first and second delivery branches, the flow splitter disposed between the main delivery trunk and the first delivery branch and between the main delivery trunk and the second delivery branch;
wherein the first delivery branch is in fluid communication with the first feed inlet of the slurry distributor, and the second delivery branch is in fluid communication with the second feed inlet of the slurry distributor.

5. The gypsum slurry mixing and dispensing assembly of claim 2 , wherein the slurry distributor includes a feed conduit, the feed conduit including the first and second entry segments and a bifurcated connector segment including first and second guide surfaces, the first and second guide surfaces respectively adapted to redirect the first flow of aqueous calcined gypsum slurry moving in a first feed flow direction through the first inlet and the first entry segment by a change in direction angle in a range up to about 135° to an outlet flow direction and adapted to redirect the second flow of aqueous calcined gypsum slurry moving in a second feed flow direction through the second inlet and the second entry segment by a change in direction angle in a range up to about 135° to the outlet flow direction.

6. The gypsum slurry mixing and dispensing assembly of claim 2 , wherein the slurry distributor includes a feed conduit, the feed conduit including the first and second entry segments and a guide channel configured to have a larger cross-sectional area than an adjacent portion of the feed conduit to promote flow of slurry through the guide channel, the guide channel disposed adjacent to a wall surface.

7. The gypsum slurry mixing and dispensing assembly of claim 2 , wherein the slurry distributor includes a feed conduit, the feed conduit including the first and second entry segments, and at least one of the feed conduit and the distribution conduit includes an area of expansion having a cross-sectional flow area that is greater than a cross-sectional flow area of an adjacent area upstream from the area of expansion in a direction from the feed conduit toward the distribution conduit.

8. The gypsum slurry mixing and dispensing assembly of claim 2 , wherein the distribution conduit includes a converging portion having a height that is smaller than a height in an adjacent region effective to increase a local shear applied to a flow of aqueous calcined gypsum slurry passing through the converging portion relative to a local shear applied in the adjacent region.

9. The gypsum slurry mixing and dispensing assembly of claim 2 , wherein the slurry distributor includes a profiling system adapted to vary the shape and/or size of the distribution outlet along the transverse axis.

10. The gypsum slurry mixing and dispensing assembly of claim 1 , wherein the width-to-height ratio of the outlet opening is in a range between 18 and 160.

Assignees

• Li Alfred
• Lee Chris C
• Chan Cesar
• Schenck Ronald E
• Song Weixin David
• Loring Curtis B
• Wittbold James R
• Rago William J
• Nelson Christopher Robert
• United States Gypsum Co

Inventors

• Li Alfred
• Lee Chris C
• Chan Cesar
• Schenck Ronald E
• Song Weixin David
• Loring Curtis B
• Wittbold James R
• Rago William J
• Nelson Christopher Robert

Classifications

• B05C5/0254 Primary

  Coating heads with slot-shaped outlet (B05C5/0283 takes precedence) · CPC title

• Y10T137/0318

  Processes · CPC title

• B05C5/0262

  adjustable in width, i.e. having lips movable relative to each other in order to modify the slot width, e.g. to close it · CPC title

• Y10T137/87571

  Multiple inlet with single outlet · CPC title

• B28B19/0092 Primary

  to webs, sheets or the like, e.g. of paper, cardboard · CPC title