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US 4,286,883 AGranted
Blending apparatus for bulk solids
AssigneeJenike & Johanson, Inc.
InventorJerry R. Johanson
Life of this patent
Estimating the term…
Abstract
Apparatus for blending bulk particulate solids comprises a distribution chute bin, a cone section having outer and inner cones, and a flow pattern controller outlet device. The solids may be recirculated from the outlet device to the chute bin for additional blending. The chute bin prevents particle size segregation by causing mixing of coarse and fine particles. The inner cone permits mass flow adjacent the outer cone, and also enforces the flow velocity profile imposed at the bottom of the cones to continue to the top of the inner cone. The flow pattern controller is operable to shift between a blending mode resulting from the difference in the velocity profiles within and around the inner cone and a uniform flow mode useful when emptying the apparatus.
Claims26
Blending apparatus for bulk solids comprising particles of coarse and fine sizes, including the combination of
- a bin having discharge means,
- a conical distribution chute with a downwardly and outwardly sloping wall situated within the bin and having a greater coefficient of friction with the fine particles than with the coarse particles,
- a deflector plate supported coaxially with the chute and within the bin and having a cylindrical interior surface spaced radially outwardly of the base of the chute, and
- a catch cylinder supported coaxially with and above the chute in position to direct said solids falling therefrom on to said sloping wall, whereby the fine particles fall from said sloping wall in a lower trajectory than that of the coarse particles as a result of said different coefficients of friction, the deflector plate having its lowermost extremity above the trajectory of the fine particles and extending vertically from said extremity a sufficient distance to intersect the trajectory of the coarse particles so as to deflect the coarse particles while permitting the fine particles to fall undeflected therebeneath, whereby the coarse and fine particles are caused to collide.
1 more element
Blending apparatus for bulk solids comprising particles of different sizes, including the combination of
- a bin having discharge means,
- an outer cone having a frustoconical closed annular inwardly and downwardly sloping interior surface forming a first angle with the vertical,
- an inner cone coaxially supported within the outer cone and having a closed annular inwardly and downwardly sloping exterior surface forming a second angle with the vertical which is smaller than said first angle, the difference between the first and second angles being less than the mass flow angle for said solids,
- a conical distribution chute with a downwardly and outwardly sloping wall situated within the bin and above the inner cone,
- a deflector plate supported coaxially with the chute and within the bin and having a cylindrical interior surface spaced radially outwardly of the base of the chute, and
- a catch cylinder supported coaxially with and above the chute in position to direct said solids falling therefrom on to said sloping wall.
3 more elements
A bin for bulk particulate solids having, in combination,
- an outer cone having a frustoconical closed annular inwardly and downwardly sloping interior surface forming a first angle with the vertical,
- a cylindrical section connecting with the lower extremity of said surface,
- an inner cone coaxially supported within the outer cone and having a closed annular inwardly and downwardly sloping exterior surface forming a second angle with the vertical which is smaller than said first angle,
- means for directing a flow of particulate solids into the annulus formed by the outer and inner cones, the first angle being greater and the difference between the first and second angles being less than the mass flow angle for said solids,
- and discharge means connecting with the lower end of the cylindrical section comprising a hopper having an inwardly and downwardly sloping surface forming an angle with the vertical which is less than the mass flow angle for said solids.
2 more elements
Blending apparatus for bulk solids comprising particles of different sizes, including the combination of
- a bin having discharge means,
- a conical distribution chute with a downwardly and outwardly sloping wall situated within the bin and supported for vertical movement,
- a deflector plate supported coaxially with the chute and within the bin and having a cylindrical interior surface spaced radially outwardly of the base of the chute,
- a catch cylinder supported coaxially with and above the chute in position to direct said solids falling therefrom on to said sloping wall, and
- feed control means responsive to a weight of solids on the chute exceeding a predetermined value to lower the chute.
2 more elements
A bin for bulk particulate solids having, in combination,
- an outer cone having a frustoconical closed annular inwardly and downwardly sloping interior surface forming a first angle with the vertical and having discharge means connecting with its lower end, and
- an inner cone coaxially supported within the outer cone and having a closed annular inwardly and downwardly sloping exterior surface forming a second angle with the vertical which is smaller than said first angle, the difference between the first and second angles being less than the mass flow angle for said solids,
- said inner and outer cones each comprising a plurality of connecting frustoconical sections of which the surfaces form differing angles with the vertical.
A bin for bulk particulate solids having, in combination,
- an outer cone having a frustoconical closed annular inwardly and downwardly sloping interior surface forming a first angle with the vertical,
- an inner cone coaxially supported within the outer cone and having closed annular inwardly and downwardly sloping exterior and interior surfaces each forming a second angle with the vertical, said second angle and the difference between the first and second angles both being less than the mass flow angle for said solids, and
- discharge means including a hopper having an inwardly and downwardly sloping interior surface forming an angle with the vertical that is less than the mass flow angle for said solids, and including means to raise and lower the hopper in relation to the lower extremity of the inner cone.
A bin for bulk particulate solids having, in combination,
- an outer cone having a frustoconical closed annular inwardly and downwardly sloping interior surface forming a first angle with the vertical,
- an inner cone coaxially supported within the outer cone and having closed annular inwardly and downwardly sloping exterior and interior surfaces forming a second angle with the vertical, the inner cone having a sleeve vertically adjustably extending from its lower extremity, said second angle and the difference between the first and second angles both being less than the mass flow angle for said solids, and
- discharge means including a hopper connecting with the lower end of the outer cone radially outwardly of the sleeve and having an inwardly and downwardly sloping interior surface forming an angle with the vertical that is less than the mass flow angle for said solids.
A bin for bulk particulate solids having, in combination,
- an outer cone having a frustoconical closed annular inwardly and downwardly sloping interior surface forming a first angle with the vertical, a cylindrical section connecting with the lower extremity of said surface, and discharge means connecting with the lower end of the cylindrical section,
- an inner cone coaxially supported within the outer cone and having a closed annular inwardly and downwardly sloping exterior surface forming a second angle with the vertical which is smaller than said first angle, and
- means for directing a flow of particulate solids simultaneously into the inner cone and the annulus formed by the outer and inner cones, the difference between the first and second angles being less than the mass flow angle for said solids.
A bin for bulk particulate solids having, in combination,
- an outer cone having a frustoconical closed annular inwardly and downwardly sloping interior surface forming a first angle with the vertical,
- discharge means comprising a conical hopper having an inwardly and downwardly sloping surface contiguous at the upper extremity with the lower extremity of the outer cone and forming an angle with the vertical which is less than the mass flow angle for said solids,
- an inner cone coaxially supported within the outer cone and having a closed annular inwardly and downwardly sloping exterior surface forming a second angle with the vertical which is smaller than said first angle, and
- means for directing a flow of particulate solids, simultaneously into the inner cone and the annulus formed by the outer and inner cones, the difference between the first and second angles being less than the mass flow angle for said solids.
1 more element
A bin for bulk particulate solids having, in combination,
- an outer cone having a frustoconical closed annular inwardly and downwardly sloping interior surface forming a first angle with the vertical and having discharge means including a hopper connecting with its lower end, said hopper having an inwardly and downwardly sloping interior surface forming an angle with the vertical that is less than the mass flow angle for said solids,
- an inner cone coaxially supported within the outer cone, open at its upper and lower extremities, having a closed annular inwardly and downwardly sloping exterior surface forming a second angle with the vertical which is smaller than said first angle, having a closed annular inwardly and downwardly sloping interior surface forming an angle with the vertical that is less than the mass flow angle for said solids, and a sleeve vertically adjustably extending from its lower extremity, the hopper connecting with the lower end of the outer cone radially outwardly of the sleeve, and
- means for directing a flow of particulate solids into the annulus formed by the outer and inner cones, the first angle being greater and the difference between the first and second angles being less than the mass flow angle for said solids.
Dependencies are inferred from the claim text.