Modular pulverizer

Abstract

A pulverizer is provided having a top having an inlet and a bottom having an outlet. A modular drum has a drum housing wall with a plurality of planar panel portions extending between the top and the bottom and connected together. A drum liner is disposed inside the drum housing wall, the drum liner including a plurality drum liner portions to attached to the planar panel portions, each drum liner portion being at least partially planar and extending along a corresponding planar panel portion, each drum liner portion being detachable from the planar panel portion independently from the other drum liner portions. A rotating shaft is mounted within the modular drum and has radially extending arms creating flow currents within the pulverizer for reducing a size of product input fed into the inlet and producing a size reduced material that is discharged through the outlet.

Claims

1. A pulverizer comprising: a top having an inlet; a bottom discharge portion having an outlet offset from the top by a vertical distance; a modular drum comprising: a drum housing wall comprising a plurality of planar panel portions extending between the top and the bottom discharge portion and connected together; and a drum liner disposed inside the drum housing wall, the drum liner including a plurality of drum liner portions attached to the planar panel portions, the plurality of drum liner portions extending along a majority of the vertical distance of a corresponding planar panel portion, each drum liner portion being detachable from the planar panel portion independently from the other drum liner portions; a rotating shaft mounted within the modular drum and having radially extending arms creating flow currents within the pulverizer for reducing a size of product input fed into the inlet and producing a size reduced material that is discharged at the outlet; and at least one shelf extending away from the drum housing wall and into a center of the drum, the at least one shelf being angled downwardly relative to a horizontal direction for directing flow inside the pulverizer, each shelf extending along a plane between an upper end connected to the drum housing wall and a lower end located away from the upper end wherein the bottom discharge portion is distinct from the modular drum and is secured thereto, the bottom discharge portion including a curved substantially annular inner surface defining a substantially cylindrical bottom cavity in communication with an interior of the modular drum, wherein the drum housing wall includes a plurality of panels, each panel including a first one of the planar panel portions and a second one of the planar panel portions disposed adjacent, and angled relative to, the first one of the planar panel portions, wherein each panel has lips, the lips of adjacent panels cooperating together to provide a location for connecting the adjacent panels together, wherein the lips extend inwardly into the modular drum at an obtuse angle respectively relative to the first and second ones of the planar panel portions.

2. The pulverizer of claim 1, wherein each shelf is disposed over a seam defined between adjacent ones of the drum liner portions to cover the seam.

3. The pulverizer of claim 1, wherein the drum liner portions are made of at least one of fiberglass, high-density polyethylene (HDPE) ceramic or steel.

4. The pulverizer of claim 1, wherein the drum liner portions include a chromium carbide overlay.

5. The pulverizer of claim 1, wherein the drum liner portions include a ceramic overlay.

6. The pulverizer of claim 1, wherein each planar panel portion includes feet connected to the bottom.

7. The pulverizer of claim 6, wherein the feet include a plurality of bores and the bottom includes corresponding bores, the bores of the feet and the bores of the bottom being configured for receiving connectors therethrough for connecting the feet to the bottom.

8. The pulverizer of claim 1, wherein the first one of the planar panel portions and the second one of the planar panel portions are angled relative to each other at an angle which is consistent between the top and the bottom.

9. The pulverizer of claim 8, wherein the first one of the planar panel portions and the second one of the planar panel portions are angled relative to each other at an angle of 30 degrees.

10. The pulverizer of claim 1, wherein at least some of the plurality of panels have a width being identical to each other.

11. The pulverizer of claim 1, wherein the lips have shoulders extending outside the modular drum to provide connection locations on an external surface of the drum.

12. A pulverizer comprising: a top having an inlet; a bottom discharge portion having an outlet offset from the top; a modular drum having a plurality of drum panels each extending between the top and the bottom discharge portion and connected together along lateral sides to define a perimeter of the modular drum; and a drum liner disposed inside the modular drum and configured to protect the drum panels from impact, the drum liner including a plurality of drum liner portions separated in a vertical direction by seams, each drum liner portion being independently detachable from the other drum liner portions; a plurality of shelves, wherein at least one shelf covers each seam, each one of the at least one shelf connected to the modular drum along an upper end and extending downwardly relative to a horizontal direction into the drum for directing flow inside the pulverizer; and a rotating shaft mounted within the modular drum and having radially extending arms creating flow currents within the pulverizer for reducing a size of product input fed into the inlet and producing a size reduced material that is discharged at the outlet, wherein the bottom discharge portion is distinct from the modular drum and is secured thereto, the bottom discharge portion including a curved substantially annular inner surface defining a substantially cylindrical bottom cavity in communication with an interior of the modular drum, wherein the plurality of drum panels each including a first planar panel portion and a second planar panel portion disposed adjacent, and angled relative to, the first the planar panel portion, wherein each drum panel has lips, the lips of adjacent drum panels cooperating together to provide a location for connecting the adjacent drum panels together, wherein the lips extend inwardly into the modular drum at an obtuse angle respectively relative to the first and second planar panel portions.

13. The pulverizer of claim 12, wherein the plurality of drum liner portions and the plurality of shelves cover a majority of a vertical distance between the top and the bottom.

14. A pulverizer comprising: a top having an inlet; a bottom discharge portion having an outlet offset from the top in a vertical direction; a plurality of modular drum panels each extending between the top and the bottom discharge portion and connected together along lateral sides to define a circumference of a pulverizing chamber along inner walls; and a plurality of drum liner portions attached to the inner walls of the plurality of modular drum panels and configured to protect the drum panels from impact, each of the plurality of drum liner portions being independently detachable, the plurality of drum liner portions being separated in the vertical direction by seams; a plurality of shelves each connected to the inner walls of the plurality of modular drum panels and extending downwardly relative to a horizontal direction into the pulverizing chamber for directing flow inside the pulverizer, wherein at least one shelf covers each seam between the drum liner portions; and a rotating shaft mounted within the modular drum and having radially extending arms creating flow currents within the pulverizer for reducing a size of product input fed into the inlet and producing a size reduced material that is discharged at the outlet, wherein the bottom discharge portion is distinct from the modular drum and is secured thereto, the bottom discharge portion including a curved substantially annular inner surface defining a substantially cylindrical bottom cavity in communication with the pulverizing chamber defined by the modular drum panels, wherein the plurality of drum panels each including a first planar panel portion and a second planar panel portion disposed adjacent, and angled relative to, the first the planar panel portion, wherein each drum panel has lips, the lips of adjacent drum panels cooperating together to provide a location for connecting the adjacent drum panels together, wherein the lips extend inwardly into the modular drum at an obtuse angle respectively relative to the first and second planar panel portions.

15. The pulverizer of claim 14, wherein the plurality of drum liner portions and the plurality of shelves cover a majority of a vertical distance between the top and the bottom.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The particular features and advantages of the invention as well as other objects will become apparent from the following description taken in connection with the accompanying drawings in which:

(2) FIG. 1 is a pulverizer construction of the presently preferred embodiment of the present invention;

(3) FIG. 2 is an exploded construction view showing the components of a pulverizer shown in FIG. 1; and

(4) FIG. 3 is a cross-sectional view of a pulverizer drum with drum liner attachments as used with a presently preferred embodiment of the invention as shown in FIGS. 1 and 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(5) FIG. 1 shows a pulverizer 10 in accordance with one embodiment of the present application. The pulverizer may be constructed with a modular drum configuration. Specifically, a series of panels 12,14,16,18,20,22, many if not all of which may be similarly constructed, may be connected together with adjacent lips 24,26 to form a drum 11. Specifically, the first lip 24 may connect to a second lip 26 of an adjacent panel 22 either internally or externally relative to the inside of the drum 11. The panels 12-22 may have bores such as a series of bores 28,30 etc. to allow for a connection to be made. Bolts may connect many adjacent panels 12-22 or the lips 24,26 may be otherwise connected for many adjacent panels 12-22 such as by welding, etc. The bores 28,30 may also be used for other features as will be described in further detail below, and additionally, there may be external connectors which may connect at shoulders 32,34 to assist in connecting adjacent panels such as 16,18 as well as feet 36,38 which may also connect together, possibly to a bottom portion 40. The feet 36,38 can connect to discharge piece or bottom portion 40 such as at perimeter bores 42,44. Furthermore, perimeter bores 46,48 of bottom portion 40 may be useful to connect to perimeter bores 150,151 of the panels 12-22. A top can be similarly or dissimilarly connected.

(6) In one embodiment, the panels 12-22 can be made similarly or even identically and so that the six panels 12-22 can come together to form a circumference about the perimeter 50 of the bottom portion 40. This way, the panels 12-22 need not be rolled after forming to a precise circumference. Instead, each of the panels 12-22 may have first and second portions 52,53 which may angularly meet together such as at about 30 degrees so that the six panels 12-22 can come together to form a complete circumference about the perimeter 50 of the bottom portion 40 so that no material escapes between the adjacent panels 12-22 during operation by connecting lips such as lips 24,26 to one another or alternatively either in a permanent manner such as by welding or using connectors such as through bores 28-30 and/or other connection. It may also be alternatively possible that at least one of the panels 12-22 is configured as a door relative to the other panels and may selectively lock in position during use in a locked configuration and then be able to be hingedly connected to an adjacent panel such as having panel 16 be hingedly connected to panel 14 while having the capability of locking the panel 18 during operation while also allowing the panel 16 to rotate open to an open configuration during periods of non-use as one of ordinary skill in the art would understand to perform service internal to the drum 11.

(7) Lips 24,26 are shown extending at obtuse angles from the panel portions 52, 53, although the lips 24, 26 may extend at acute angles or be perpendicular to panel portions 52,53 and/or along radius of the drum (if thought of as round) and/or housing 61 to facilitate connection and/or construction.

(8) Generally a consistent circumference about a large diameter cylindrical housing has been found to be expensive particularly when utilizing AR 400 or other metal. Few machine shops have been found to be willing to roll unitary drums to the desired shape. By providing the panel construction, the cost to form the housing or drum would significantly decrease.

(9) Furthermore, by providing six separate panels 12-22 to provide a drum 11, possibly modular in nature, if any one of the panels 12-22 is damaged, they could simply be replaced without having to replace the entire housing. Furthermore, shipment of panels 12-22 as opposed to a unitary drum is generally easier as well. The amount of steel can be decreased and assembly is believed to be greatly improved in efficiency compared to other options. While six panels 12-22 are shown each having two portions, such as the planar portions 52,53. Other embodiments may have other numbers of panels 12-22, possibly with other numbers of portions 52-53 and/or meeting at other angles. Furthermore, not all panels 12-22 need necessarily be similarly constructed for all embodiments.

(10) While AR 400 or other high strength metal can be utilized, the various improvements disclosed herein can provide a design providing more panels than the six panels 12-22 illustrated and still other improvements.

(11) Additionally, while making a modular drum construction, it is further anticipated that drum liner attachments could be modular in nature for at least some embodiments.

(12) FIG. 3 shows first, second, third and fourth drum liner attachment portions 54,56,58,60 forming a drum liner 59 which can be located against drum 11 or housing wall 61 i.e. along any of the panels 12-22 shown in FIG. 10 or against a drum or housing wall of any other pulverizer as is known in the art. Housing wall 61 may be curved (such as cylindrical) or angled (i.e. made of planar panel portions meeting at an angle) as described above or otherwise along insides of the drum 11. Specifically, the drum liner attachment portions 54-60 can have seams 62,66,67 as well as 68,70 which may be protected from contact such as by shelves 72,74,76 as well as guards 78,79 at the top 80 and bottom 82 respectively

(13) By providing a drum liner 59 in the form of portions such as the portions 54,56,58,60 it may be possible to test different materials other than just AR400 rolled steel as has traditionally been utilized as a drum housing wall 61 in the past. It may be that there is a low cost wear product whether a fiberglass, an HDPE high density polyethylene, a ceramic, some steels, chromium carbide overlays, ceramic overlays and/or other materials that may benefit from being utilized as any of the drum liner attachment portions 54-60 as would be understood by the reference to FIG. 3 and FIG. 2 if four portions 54,56,58,60 were utilized per panel, then a total of twenty-four total portions 54,56,58,60 (four times six) could then be utilized. Of course, the drum 11 could be less wear resistant than prior art designs (or not) and the liner(s) 59 could address impact internal to the drum 11 and/or address other concerns. Internal surfaces 55 of the drum liner 59 could be curved, like a cylinder or otherwise, or be planar regardless of the curvature or planar nature of the housing wall 61 depending upon the design objectives of the pulverizer 10.

(14) Of course, other constructions could provide fewer or more portions 54-60. Utilizing the shelves 72,74,76 it has been found that they provide a particularly efficient way to cover over the seams 62,66,67 of adjacent portions as described above while other methods could connect in different ways. Additionally, the deflectors and/or shelves themselves may also be made in modular sets such as could be connected to each of the respective panels 12-22 such as in the form of portions 54-60 illustrated in FIG. 3 possibly only extending the width 84 of a single panel such as 18. Other portions 54-60 for other embodiments may be made to extend circumferentially about the entire drum. Other portions may extend vertically from top 80 to bottom 82 or anywhere in between.

(15) Deflectors and/or shelves as shown in FIG. 1 may also be provided in modular form for at least some embodiments. The first and second planar portions 52,53 may be representative for each of the panels 12-22 or it may be that additional or fewer portions 52,53 would be provided for a respective panel. Portions 52,53 may be planar and connect with an interface such as at interface 86 which may define a consistent angle from a top 88 to a bottom 90 of the panel 12. Other embodiments could be constructed differently.

(16) Furthermore, an intermediate lateral brace 92 could be provided for structural support and can be in addition to a bottom base 94 as well as an upper extension 96 for structural integrity of each of the panels 12-22. The brace 92, the bottom base 94 and the upper extension 96 are shown extending from lip to lip 24,26 of each panel, for at least some embodiments.

(17) By constructing panels 12-22 and/or drum liner attachment portions 54-60 in such a way that the scalability can be increased, modularity can be made more efficient and the cost can be dropped to provide easier assembly for at least some embodiments.

(18) Accordingly, a pulverizer 10 may comprise a top 80 having a perimeter 81, a bottom 82 having a perimeter 83, and a plurality of planar panel portions 52,53 connected together between the top 80 to the bottom 82 to provide a modular drum 11 construction. The pulverizer 10 also has a rotating shaft 190 having radially extending arms 191,192,193 (or other numbers, at possibly the same or other elevations as better described by the patents/patent applications incorporated by reference herein) creating flow currents within the pulverizer 10 thereby reducing the size of product input 194 near the top and discharged at the bottom as output 195. Unlike prior art constructions, the panel portions 52,53 can be planar, and preferably modular, rather than being formed of a single cylindrically rolled drum, which can be rather expensive to produce.

(19) The pulverizer 10 can connect the top 80 to the plurality of panel portions 52,53 as well the bottom 82. The top 80 can have an inlet 196 while the bottom has an outlet 197 whereby material to be pulverized is fed in the inlet 196 as input 194, broken into smaller pieces, and then discharged from the outlet 197 as output 195.

(20) Panels 12,14,16,18,20,22 and/or others can have multiple panel portions 52,53, such as first and second panel portions 52,53. Some, many or even all of the panels 12-22 may be similarly constructed. The panels 12-22 can have feet 36,38 which connect to the bottom 82, such as with respective bores 150,151 etc. and 46,48, etc. in each receiving connectors therethrough, or otherwise. The panels 12-22 can have lips 24,26 whereby adjacent lips 24,26 may connect with one another to assist in forming the drum 11. The lips 24,26 may also have shoulders 32 which can provide connection locations on an external surface of the drum 11.

(21) For some embodiments, at least one panel portion 52,53, if not a panel 12-22, forms the door as shown in FIG. 1 or otherwise by being hingedly connected to another panel portion 52 or 53 (if not another panel 12-22) and having a locked shut configuration and an open configuration as described above, or otherwise.

(22) Internal to the drum 11 can be at least one drum liner 59, if not a plurality of drum liner portions 54-60. The drum liner 59 can meet the top 80 and bottom 82 at seams 68,70, and drum liner portions 54-60 can meet one another at seams 62,66,67. The seams 62,66,67,68,70 can be covered with at least one of shelves 72,74,76 and/or guards 78,79. Shelves 72,74,76 can assist in directing flow in the pulverizer 10.

(23) Numerous alterations of the structure herein disclosed will suggest themselves to those skilled in the art. However, it is to be understood that the present disclosure relates to the preferred embodiment of the invention which is for purposes of illustration only and not to be construed as a limitation of the invention. All such modifications which do not depart from the spirit of the invention are intended to be included within the scope of the appended claims.