| 摘要 |
<p>Apparatus for forming an aqueous dilution or aqueous solution of a water-soluble or water swellable particulate material in which the material is a water-soluble or water swellable polymer with a weight average particle size of no more than 2000 µm, comprising:
a make up unit (18),
a scroll conveying line (6) comprising a duct (6A) defined by a wall and a scroll conveyor (6B) within said duct, wherein the scroll conveying line has an inlet (6D) through which material enters and an outlet (6C) through which the material leaves the scroll conveying line, and
an air conveying line (3) comprising a duct through which an air stream conveys the material to the make up unit (18) in which the material is hydrated or dissolved to form an aqueous dilution or aqueous solution,
in which the air conveying line is provided with an air pressure of at least 20 milli Bar,
in which the scroll conveying line (6) is provided with a means for ensuring the material substantially fills the space between the scroll conveyor and the wall of the duct at least at the outlet end of the conveying line,
wherein the means is selected from,
(a) the scroll conveying line (6) or outlet (6C) is in communication with an element that restricts the flow of material from the outlet, and/or
(b) the scroll conveying line (6) is mounted at a gradient or a substantially vertical orientation, such that the outlet (6C) is positioned higher than the inlet (6D).</p> |
