CA1099494A - Rendering apparatus - Google Patents
Rendering apparatusInfo
- Publication number
- CA1099494A CA1099494A CA283,249A CA283249A CA1099494A CA 1099494 A CA1099494 A CA 1099494A CA 283249 A CA283249 A CA 283249A CA 1099494 A CA1099494 A CA 1099494A
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- CA
- Canada
- Prior art keywords
- cylinder
- discharge
- tube
- opening
- cylinders
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B1/00—Production of fats or fatty oils from raw materials
- C11B1/12—Production of fats or fatty oils from raw materials by melting out
Abstract
RENDERING APPARATUS
Abstract of the Disclosure An apparatus for the continuous rendering under vacuum of raw, animal material primarily composed of fat, meat and bone solids, and water into fluid fat and crack-lings. The apparatus includes a plurality of elongated, vertically spaced and horizontally oriented chambers that are interconnected for the sequential flow therethrough of the material to be rendered. Each chamber has the material discharge, inlet, and product steam vents located in the chamber ends so that the chamber is heated along its entire length and has agitator means also extending along its entire length for an efficient heat transfer to the material and removal of the water vapor developed.
Abstract of the Disclosure An apparatus for the continuous rendering under vacuum of raw, animal material primarily composed of fat, meat and bone solids, and water into fluid fat and crack-lings. The apparatus includes a plurality of elongated, vertically spaced and horizontally oriented chambers that are interconnected for the sequential flow therethrough of the material to be rendered. Each chamber has the material discharge, inlet, and product steam vents located in the chamber ends so that the chamber is heated along its entire length and has agitator means also extending along its entire length for an efficient heat transfer to the material and removal of the water vapor developed.
Description
Background of the Invention 1. Field of the Invention.
This invention pertains generally to apparatus for rendering fat from animal material.
This invention pertains generally to apparatus for rendering fat from animal material.
2. Description of the Prior Art.
A conventional apparatus for the continuous ren-dering of fat from animal material utilizes a series of heated, vertically spaced and interconnected horizontal cylinders or tubes for the sequential flow therethrough of material to be rendered. One such apparatus is dis-closed in U.S. Patent 3,410,882 granted November 12, 1968.
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However, no provision is shown therein for rendering under vacuum conditions. Inasmuch as substantial water vapor in the form of product steam is developed, the continuous removal thereof, aided by the vacuum, during the process is most desirable. Further, the vacuum pre-vents the oxidizing of the product fat because of the air-free environment. U.S. Patent 3,782,902 granted January 1, 1974, and assigned to assignee of sub~ect application discloses an apparatus to accomplish this result. The standpipe arrangement disclosed in this patent preserves the vacuum condition in the apparatus.
While the above-noted apparatus shown in U.S. Patent
A conventional apparatus for the continuous ren-dering of fat from animal material utilizes a series of heated, vertically spaced and interconnected horizontal cylinders or tubes for the sequential flow therethrough of material to be rendered. One such apparatus is dis-closed in U.S. Patent 3,410,882 granted November 12, 1968.
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However, no provision is shown therein for rendering under vacuum conditions. Inasmuch as substantial water vapor in the form of product steam is developed, the continuous removal thereof, aided by the vacuum, during the process is most desirable. Further, the vacuum pre-vents the oxidizing of the product fat because of the air-free environment. U.S. Patent 3,782,902 granted January 1, 1974, and assigned to assignee of sub~ect application discloses an apparatus to accomplish this result. The standpipe arrangement disclosed in this patent preserves the vacuum condition in the apparatus.
While the above-noted apparatus shown in U.S. Patent
3,702,902 has proved to be relatively efficlent, neverthe-less the output of the apparatus could be improved.
Because of the size of each tube, which may be 24 inches O.D. and the need to provide for the mounting of the agitator shaft on the ends thereof, the inlet and dis-charge were made through the tube wall. Of necessity, this restricted the length of the steam ~acket to a dimen-sion short of the full length of the tube. Also the agitator member had to have a length short of the full length of the tube to avoid interference with the dis-charge and to allow provision for a gateor dam to control material flow through the tube. Further, venting of the product steam was also provided through the tube wall and preferably at the discharge end. As a consequence of the above construction, the capacity of each tube in rendering or cooking output and evaporation rate is unduly low.
1~9949~
Summary of the Invention lhe present invention provides a continuous rendering apparatus of the type comprising: a plurality of generally horizontal cylinders having opposed end walls and arranged one above the other, connection means inter-coupling the discharge end of each cylinder and the entry end of the cylinder therebeneath, the discharge end of each cylinder being adjacent the entry end of the cylinder therebeneath, whereby the material to be rendered passes sequentially and downwardly through said cylinders, heating means for heating each cylinder, elongated agitator means rotatably positioned in each cylinder for moving the material about the inner circumference of each cylinder, vent means from each cylinder for venting the vaporized moisture, vacuum means connected to each of said vent means for creating a vacuum in each of said cylinders, and seal means connected to a discharge pipe of the lowest cylinder ; for preserving the vacuum in said cylinders, wherein the improvement com-prises: said connection means including a discharge opening in the exit end wall of each cylinder, an inlet opening in the entry end wall of the cylinder therebeneath, and a discharge chute for each discharge opening, each chute extending beyond the ends of said cylinders and intercoupling a respective discharge opening with the inlet opening therebelow; said discharge opening being generally L-shaped and having a curved surface extending only along a portion of the lower half of the cylinder and generally aligned with the inner periphery thereof and said opening extending over only a portion of the lower half of said cylinder with its highest point being on said curved surface in the direction of rotation of said agitator means.
The present invention also provides a continuous rendering apparatus of the type comprising: a plurality of generally horizontal cylinders having opposed end walls and arranged one above the other, connection means inter-coupling the discharge end of each cylinder and the entry end of the cylinder therebeneath, the discharge end of each cylinder being adjacent the entry end of the cylinder therebeneath, whereby the material to be rendered passes ~. -3-1~9949~
sequentially and downwardly through said cylinders, heating means for heating each cylinder, elongated agitator means rotatably positioned in each cylinder for moving the material about the inner circumference of each cylinder, vent means from each cylinder for venting the vaporized moisture, vacuum means connected to each of said vent means for creating a vacuum in each of said cylinders, and seal means connected to a discharge pipe of the lowest cylinder for preserving the vacuum in said cylinders, wherein the improvement com- -prises: said connection means including a discharge opening in the exit end wall of each cylinder, an inlet opening in the entry end wall of the cylinder 1~ therebeneath, and a discharge chute for each discharge opening, each chute extending beyond the ends of said cylinders and intercoupling a respective discharge opening with the inlet opening therebelow; said discharge opening having a curved surface extending only along a portion of the lower half of the cylinder and generally aligned with the inner periphery thereof and said opening extending over only a portion of the lower half of said cylinder with its highest point being on said curved surface in the direction of rotation of said agitator means; said opening being generally L-shaped with a generally vertical leg and a generally horizontal leg, said generally vertical leg extending upwardly along said curved surface to a point approximately on the horizontal diameter of said cylinder, said generally horizontal leg extending from the bottom of said vertical leg away from said curved surface a distance less than the full diameter of said cylinder.
Generally, the Applicant provides an apparatus that doubles the rendering output and evaporation rate without a similar increase in size.
Specifically, for example, Applicant increased each tube size from 24 inches O.D. to 36 inches O.D. for a five tube apparatus compared to a 6 tube apparatus of similar length, thus providing only 53% greater area. Further, and more importantly, for example, Applicant relocated the material inlet and dis-charge of each chamber or tube to the ends thereof and also the product steam vents along with the agitator bearings. According to the present invention " ~ ' -3a-1~399494 the steam jacket can extend the full length of the tube along with the agitator member. Hence, the heat transfer to the material is substantially improved since the entire length of tube is now utilized.
Also important in achieving the noted capacity is a consideration of the agitator operation. In apparatus of this type, the material moves sequentially through the tubes generally propelled by the incoming material and gravity. However, some longitudinal impetus is given to the material by the later to be described agitator. The agitator includes a shaft extending longitudinally through the tube and has a plurality of paddle-like elements thereon that extend toward the inner circumference of the tube.
Preferably the agitator is rotated at sufficient speed, which may be approximately 50 RPM, for the apparatus detailed to cause the material, which may cover the lower quarter of the tube at rest, to be thrown outwardly -3b-- ~199494 by centrifugal force against the inner circumference of the tube and move around same in a spiral fashion to a discharge. Speeds of 72 and 88 RPM have also proven to be satisfactory. Besides providing a good heat transfer rate to the material, this clears a large portion of the tube for product steam venting. The action of the agita-tor on the steam, aided by the vacuum also causes the steam to move in a spiral fashion through the tube toward the steam vents which are preferably located at each end of the tube for efficient removal at low back pressure.
For needed efficient material flow between tubes via the discharge end of one tube to the inlet of a lower tube, Applicant designed an end discharge that has a lower opening and an upper, preferably curved opening in the direction of rotation of the agitator that is located offset from the tube vertical centerline to accommodate the material moving about the inner circumference of the tube as it approaches the discharge end. The material --as it moves out this volute-like discharge falls into the inlet of the lower tube aligned with the discharge and similarly offset from its vertical centerline for a straight through material flow. The vent for this inlet tube end is located on the opposite side of the centerline to avoid the incoming material. Preferably a dam or gate is located in the discharge to control the flow of mater-ial through the tube. An upper vent is also provided in each discharge end of the tube. Manifolds located at each tube end and connected to the vents later combine to conduct the product steam to a condenser.
1~494 Also a part of the apparatus is a standpipe connected to the discharge of the bottom tube to allow continuous rendering while maintaining the vacuum in the tubes.
Suitable standpipe water sumps for each manifold collect solid residue carry over and provide vacuum and pressure reliefs. Preferably the material is also initially intro-duced into the top tube of the apparatus in an air free condition by a piston pump feed.
It is, therefore, an ob~ect of this invention to provide a new and improved apparatus for rendering animal material.
Another ob;ect of this invention is to provide an apparatus having a plurality of tubes wherein the entire length of the tubes is utilized for an improved heat transfer to the material and the tube ends for the mater-ial transfer and the removal of product steam.
Brief Description of the Drawings Fig. 1 is a front elevation (partially schematic) with portions cut away of the rendering apparatus of this invention;
Fig. 2 is a side view taken along line 2-2 of Fig. l;
Fig. 3 is a side view (partially schematic) taken along line 3-3 of Fig. l;
Fig. 4 is an enlarged elevation view similar to Fig.
2 of a discharge end of a chamber of the apparatus and a related chamber inlet, Fig. 5 is a sectional view taken along 5-5 of Fig.
Because of the size of each tube, which may be 24 inches O.D. and the need to provide for the mounting of the agitator shaft on the ends thereof, the inlet and dis-charge were made through the tube wall. Of necessity, this restricted the length of the steam ~acket to a dimen-sion short of the full length of the tube. Also the agitator member had to have a length short of the full length of the tube to avoid interference with the dis-charge and to allow provision for a gateor dam to control material flow through the tube. Further, venting of the product steam was also provided through the tube wall and preferably at the discharge end. As a consequence of the above construction, the capacity of each tube in rendering or cooking output and evaporation rate is unduly low.
1~9949~
Summary of the Invention lhe present invention provides a continuous rendering apparatus of the type comprising: a plurality of generally horizontal cylinders having opposed end walls and arranged one above the other, connection means inter-coupling the discharge end of each cylinder and the entry end of the cylinder therebeneath, the discharge end of each cylinder being adjacent the entry end of the cylinder therebeneath, whereby the material to be rendered passes sequentially and downwardly through said cylinders, heating means for heating each cylinder, elongated agitator means rotatably positioned in each cylinder for moving the material about the inner circumference of each cylinder, vent means from each cylinder for venting the vaporized moisture, vacuum means connected to each of said vent means for creating a vacuum in each of said cylinders, and seal means connected to a discharge pipe of the lowest cylinder ; for preserving the vacuum in said cylinders, wherein the improvement com-prises: said connection means including a discharge opening in the exit end wall of each cylinder, an inlet opening in the entry end wall of the cylinder therebeneath, and a discharge chute for each discharge opening, each chute extending beyond the ends of said cylinders and intercoupling a respective discharge opening with the inlet opening therebelow; said discharge opening being generally L-shaped and having a curved surface extending only along a portion of the lower half of the cylinder and generally aligned with the inner periphery thereof and said opening extending over only a portion of the lower half of said cylinder with its highest point being on said curved surface in the direction of rotation of said agitator means.
The present invention also provides a continuous rendering apparatus of the type comprising: a plurality of generally horizontal cylinders having opposed end walls and arranged one above the other, connection means inter-coupling the discharge end of each cylinder and the entry end of the cylinder therebeneath, the discharge end of each cylinder being adjacent the entry end of the cylinder therebeneath, whereby the material to be rendered passes ~. -3-1~9949~
sequentially and downwardly through said cylinders, heating means for heating each cylinder, elongated agitator means rotatably positioned in each cylinder for moving the material about the inner circumference of each cylinder, vent means from each cylinder for venting the vaporized moisture, vacuum means connected to each of said vent means for creating a vacuum in each of said cylinders, and seal means connected to a discharge pipe of the lowest cylinder for preserving the vacuum in said cylinders, wherein the improvement com- -prises: said connection means including a discharge opening in the exit end wall of each cylinder, an inlet opening in the entry end wall of the cylinder 1~ therebeneath, and a discharge chute for each discharge opening, each chute extending beyond the ends of said cylinders and intercoupling a respective discharge opening with the inlet opening therebelow; said discharge opening having a curved surface extending only along a portion of the lower half of the cylinder and generally aligned with the inner periphery thereof and said opening extending over only a portion of the lower half of said cylinder with its highest point being on said curved surface in the direction of rotation of said agitator means; said opening being generally L-shaped with a generally vertical leg and a generally horizontal leg, said generally vertical leg extending upwardly along said curved surface to a point approximately on the horizontal diameter of said cylinder, said generally horizontal leg extending from the bottom of said vertical leg away from said curved surface a distance less than the full diameter of said cylinder.
Generally, the Applicant provides an apparatus that doubles the rendering output and evaporation rate without a similar increase in size.
Specifically, for example, Applicant increased each tube size from 24 inches O.D. to 36 inches O.D. for a five tube apparatus compared to a 6 tube apparatus of similar length, thus providing only 53% greater area. Further, and more importantly, for example, Applicant relocated the material inlet and dis-charge of each chamber or tube to the ends thereof and also the product steam vents along with the agitator bearings. According to the present invention " ~ ' -3a-1~399494 the steam jacket can extend the full length of the tube along with the agitator member. Hence, the heat transfer to the material is substantially improved since the entire length of tube is now utilized.
Also important in achieving the noted capacity is a consideration of the agitator operation. In apparatus of this type, the material moves sequentially through the tubes generally propelled by the incoming material and gravity. However, some longitudinal impetus is given to the material by the later to be described agitator. The agitator includes a shaft extending longitudinally through the tube and has a plurality of paddle-like elements thereon that extend toward the inner circumference of the tube.
Preferably the agitator is rotated at sufficient speed, which may be approximately 50 RPM, for the apparatus detailed to cause the material, which may cover the lower quarter of the tube at rest, to be thrown outwardly -3b-- ~199494 by centrifugal force against the inner circumference of the tube and move around same in a spiral fashion to a discharge. Speeds of 72 and 88 RPM have also proven to be satisfactory. Besides providing a good heat transfer rate to the material, this clears a large portion of the tube for product steam venting. The action of the agita-tor on the steam, aided by the vacuum also causes the steam to move in a spiral fashion through the tube toward the steam vents which are preferably located at each end of the tube for efficient removal at low back pressure.
For needed efficient material flow between tubes via the discharge end of one tube to the inlet of a lower tube, Applicant designed an end discharge that has a lower opening and an upper, preferably curved opening in the direction of rotation of the agitator that is located offset from the tube vertical centerline to accommodate the material moving about the inner circumference of the tube as it approaches the discharge end. The material --as it moves out this volute-like discharge falls into the inlet of the lower tube aligned with the discharge and similarly offset from its vertical centerline for a straight through material flow. The vent for this inlet tube end is located on the opposite side of the centerline to avoid the incoming material. Preferably a dam or gate is located in the discharge to control the flow of mater-ial through the tube. An upper vent is also provided in each discharge end of the tube. Manifolds located at each tube end and connected to the vents later combine to conduct the product steam to a condenser.
1~494 Also a part of the apparatus is a standpipe connected to the discharge of the bottom tube to allow continuous rendering while maintaining the vacuum in the tubes.
Suitable standpipe water sumps for each manifold collect solid residue carry over and provide vacuum and pressure reliefs. Preferably the material is also initially intro-duced into the top tube of the apparatus in an air free condition by a piston pump feed.
It is, therefore, an ob~ect of this invention to provide a new and improved apparatus for rendering animal material.
Another ob;ect of this invention is to provide an apparatus having a plurality of tubes wherein the entire length of the tubes is utilized for an improved heat transfer to the material and the tube ends for the mater-ial transfer and the removal of product steam.
Brief Description of the Drawings Fig. 1 is a front elevation (partially schematic) with portions cut away of the rendering apparatus of this invention;
Fig. 2 is a side view taken along line 2-2 of Fig. l;
Fig. 3 is a side view (partially schematic) taken along line 3-3 of Fig. l;
Fig. 4 is an enlarged elevation view similar to Fig.
2 of a discharge end of a chamber of the apparatus and a related chamber inlet, Fig. 5 is a sectional view taken along 5-5 of Fig.
4; and 1~9949~
Fig.6 is a sectional view similar to Fig. 5 but of an inlet end of a chamber.
Description of the Preferred Embodiment .
Referring to Figs. 1-3, 10 indicates the rendering apparatus of this invention. Apparatus 10 includes a pair of similar lower supports 11 which consist of steel plates welded together to form a base for the apparatus.
Specifically, a support 11 includes bottom plate 12 and upper plate 14 with vertical reinforcing plates there-between. Mounted on the upper side of bottom plate 12 is generally rectangular reinforcement 15 for the chambers or tubes of the apparatus. Reinforcement 15 which is the same for both ends of lower tube 17 and the other tubes of cylinders 18, 19, 20 and 21 of the apparatus, includes end plate 23 welded to and surrounding the end of each tube. Also welded to end plate 23 and shown best in Fig.
4 are narrow upper and lower bars 24 and 25 which with the side bars 26 and 27 provide a box-like support structure at each end of the tube. Via suitable fasteners in the upper and lower bars 24 and 25, each tube is fastened to another and thus vertically supported to form the appar-atus starting from its base support 11.
Surrounding each tube of the apparatus is a steam ~acket 29 that extends between the end plates 23. Suit-able pipes 30 having attached flanges provide steam com-munication with ~acket 29 to thus heat each tube wherein the internal temperature may vary between the tubes from approximately 180F to 280F for the apparatus 10. The steam may vary from 110 P.S.I. and 320F to 150 P.S.I.
l~a~s4 and 365F and somewhat higher.
As shown best in Figs. 1 and 2, the material to berendered is introduced into the apparatus 10, in an air free state by preferably a piston type pump at flanged opening 30a at the left end of top tube 21. The material flow is in the general direction of solid line arrows through tube 21 into tube 20 below and hence, the length of tube 20 and down through the apparatus with eventual dis-charge at the discharge end of tube 17. As noted previously, the actual material flow is in a spiral fashion through each tube because of the agitation. A suitable air lock at the discharge end of tube 17, which may be a stand pipe, is required to maintain the vacuum, which may be 6 - 10 inches of H2O in the tubes.
Because of the sequential movement of the material through the tubes, varying end covers are provided. As shown generally in Figs. 1 and 2, each tube has a discharge end and an inlet end. Since the tubes are identical, as are the discharge ends except for hand, the discharge end of tube 18 will be described along with the inlet end of tube 17 associated therewith as shown in Fig. 4. It is to be noted that the covers selected depend upon the later to be des-cribed agitator rotation and vent connections to the mani-folds. As noted in Fig. 2, by the arrows, the rotation is clockwise for each tube with each agitator being driven by independent drives at approximately 50 R.P.M. for the apparatus described.
Figs. 4 and 5 show on a larger scale, the discharge end of tube 18. Cover 31 is removably fastened to end plate 23 by bolts 32 and nuts 34 with a gasket 35 therebetween. Cover 31 has an opening 36 therethrough in its bottom portion and ~'99494 thus in communication with the bottom portion of the tube orchamber. Opening 36 has a lower curved surface 37 that is generally aligned with the inner periphery of tube 18 and starts from a vertically extending surface 38 on one side of the vertical centerline of the tube and extends upwardly on a radius to above the horizontal centerline of the tube and on the opposite side of the vertical centerline thereby following the direction of rotation of the agitator. Vertical surfaces 38, 39, and 40, with essentially horizontal surfaces 41, 42, and 44 define a generally crescent shaped opening with a lower portion and an upper portion for the travel of rotatably agitated material to pass out of tube 18. Surround-ing opening 36 and welded to cover 31 and thus forming a part thereof, is discharge chute 45. Chute 45 has a flanged surface 46 that is located generally on the same side of the cover and hence tube vertical centerline as upper section of opening 36 and as the later to be described inlet cover.
Chute 45 also has a pad 48 on an exterior thereof for supporting pillow block bearing 49 for the agitator 50.
Agitator 50 has a longitudinally extending shaft 51 which is sealingly located in cover 31 by a stuffing box type seal 53. Mounted on cover 31 adjacent the lowest part of opening 36 is adjustable dam or gate 54 which controls the flow of material through tube 18. Access to gate 54 is had through aperture 55 in chute 45 which is closed by cap 56 via suitable fasteners. Also a part of cover 31 is upper vent opening 57 located in the upper portion of cover 31. Shown in dotted lines in Figure 4 and in solid lines in Fig. 1, is angle mount 59 of agitator 50. Each angle mount includes 4 spaced angles mounted on a supporting cluster which is keyed to shaft 51. The angles are located 1~99494 The angles are located on the shaft depending upon its rota-tion. As shown in Fig. 4, the angles are designed to rotate down into the material to be rendered which on start up may to cover the lower quarter of the tube, and by centrifugal force maintain the material about the periphery of the tube.
Some 4 spaced angle mounts are mounted on shaft 51 inter-spersed by 4 radially offset at preferably 45 but similar angle mounts 60. The angles of both angle mounts overlap longitudinally as shown in Fig. 1 which allows more angles(8) in ~e internal tube area. Due to the size of the material to be rendered, materials located in the clearance of the revolution between the angle and tube inner wall are com-pressed and thus moved longitudinally thereby assisting in the longitudinal travel of material through the tube which is particularly useful on discharge.
Referring to Fig. 6, therein is shown cover 61, which defines the inlet for tube 17 and which is in communication with the discharge of tube 18. Cover 61 is closed in its bottom portion but has upper opening 62 which extends a substantial portion of the width of cover 61. Below open-ing 62 is support plate 64 attached to cover 61 and mounted thereon is pillow block bearing 65 for shaft 51 of agitator 50. A suitable stuffing box seal seals the shaft 51 where same extends through cover 61.
As best shown in Figs. 4 and 2, the material transition conduit 67 is attached to surface g6 of chute 45 of discharge cover 31 by suitable fasteners and extends downwardly to attach to vent transition 68 of cover 61. Transition 68 is preferably a weldment made from 8 guage hot rolled steel.
Transition 68 has a large rectangular flanged surface 69 that is constructed to enclose opening 62 of tube 17.
_g_ , ~99494 Transition 68 also has an upper opening aligned with transi-tion conduit 67 and located on the same side of the vertical centerline for tubes 17 and 18 and the balance of the tubes.
Material can thus flow in the direction of the arrow through the transitions, which are welded together, vertically downward and enter into tube 17 through one side of opening 62. The other side of opening 62 is connected via vent portion 69a of transition 68 which extends away from tube 17 and has a flanged surface 70 which is adapted via fasteners to be connected to a vent system 71. Also connected to vent system 71 is vent transition72 which is attached to discharge cover 31 and encompasses upper opening 57. Vent transition 72 is similar to transition 68 but does not have the opening for the material travel. Only venting is per-formed via opening 57.
Vent system 71 for removing the product steam via the broken line arrows is shown best in Figs. 1 - 3. Vent system 71 consists of dual vertical manifolds 73 and 74 with an upper horizontal manifold 75 connecting same. Each tube 17 - 21 is vented at both ends at the adjacent vertical manifold. As shown best in Figs. 1 and 3, exemplary mani-fold 73 is supported on ~e apparatus 10 formed from the tubes by various structural members. One of the members, base plate 76 is attached by fasteners to support 11.
Channel 78 is attached to base plate 76 and extends upwardly to a position short of tube 21 and is supported in the ver-tical position by angles 79, 80, and 81, with 81 welded to plate 82 which is bolted to reinforcing member 15. Angle 79 is bolted to channel 78, thereby connecting manifold 73 to the apparatus. Similar lower structural members also provide support to manifold 73. Manifold 74 is similarly supported on the other side of apparatus 10 with manifolds ~(~9~9494 73 and 74 supporting manifold 75 which is connected to con-ventional condenser 84.
Referring to Fig. 1, schematically shown therein, is a water containing stand pipe pump 85 connected to manifold 73 by a pipe as large in diameter as the raw feed pipe to collect solid carry over material and which also serves as a positive pressure relief and a vacuum relief. Manifold 74 is intended to have a similar stand pipe pump (not shown).
Also a part of the apparatus, and shown schematically in Fig. 3, is a suitable air lock to maintain the vacuum applied to the vent system while discharging fat and crack-lings which is also of the standpipe variety. The standpipe arrangement incluaes a holding tank 86 extending below stand-pipe 87 connected to the discharge of lower tube 17. Tank 86 which has a drain 88, maintains a desired level of fluid fat therein that is above the lower end of the standpipe.
A conveyor 89 is provided to move the solids from tank 86.
A conventional add fat conduit 90 extending between holding tank 86 supplies fat as needed to opening 30 via an adjust-able speed pump 91 to prevent high protein glue from sticking to the tube inner surfaces.
In operation, raw animal material is fed in an air free state into flanged opening 30a connected to tube 21 which is otherwise identical to tube 17 and is heated by jacket 29.
Simultaneously via a vent portion, product steam is vented to manifold 74 connected via top manifold 75 to condenser 84. Agitator 50 rotating in a clockwise direction lifts the material from the tube bottom via angle mounts 59 and 60 and by centrifugal force throws same about the periphery of the inner tube circumference to be heated by the jacket. As the material continues to move into the tube, and due in part to 1~99494 the agitator action, the material moves in a spiral fashion through tube 21 toward the discharge end. The product steam, which occupies most of the tube volume, due to the agitator action and the vacuum, moves in a spiral fashion toward manifold 74 at the intake end and toward manifold 73 at the discharge end. At the discharge end of tube 21 (see Fig. 3) a certain amount of material is retained in the tube by the gate, thereby controlling the flow, and the balance moves down into tube 20 with simultaneous venting of steam to manifold 73. At this point it might be noted that the material held back by the dam is also being continuously removed to prevent overcooking. The material then moves sequentially through the length of the tubes down through the apparatus. It is to be noted that the discharge end of tube 21 is identical to discharge end of tube 18 except for hand and hence will be detailed in connection with tube 18.
When the material reaches the discharge end of tube 18 as shown best in Figs. 1, 4, and 5, gate 54 retains an amount of constantly renewed material in tube 18. The material is continually being moved about the periphery of the inner circumference of the tube. At the opening 36 in cover 31, the material enters same and as the agitator advances also moves out the upper curved portion of the opening via discharge chute 45 and transitions 67 and 68 into tube 17 on the same side of the centerline as chute 45.
Simultaneously steam is vented from tube 18 via vent tran-siston 72 to vertical manifold 74. Also vent portion 69a ~ -conducts steam from tube 17 via the part of opening 62 (not occupied by material) into manifold 74. The material then 1~999L94 moves to the discharge end of tube 17 where it leaves the tube while the air lock maintains the vacuum condition in the apparatus. At this end also, venting of product steam occurs to manifold 73.
In a 5 tube apparatus as shown in Fig. 1 with each tube having dimensions of 36 inches O.D. and 34 inches I.D.
with a length of 20 ft., 21,000 lbs. per hour of raw material were cooked with an evaporation rate of 11,700 lbs. per hour, which as mentioned previously represents double the output of 6 - 24 inches O.D. 22 inches I.D. 20 ft. long tubes with only a 53% increase in area.
Having thus described the invention, it will be clear to those skilled in the art that various changes and modifi-cations can be made without departing from the spirit of the invention or the scope of the appended claims.
Fig.6 is a sectional view similar to Fig. 5 but of an inlet end of a chamber.
Description of the Preferred Embodiment .
Referring to Figs. 1-3, 10 indicates the rendering apparatus of this invention. Apparatus 10 includes a pair of similar lower supports 11 which consist of steel plates welded together to form a base for the apparatus.
Specifically, a support 11 includes bottom plate 12 and upper plate 14 with vertical reinforcing plates there-between. Mounted on the upper side of bottom plate 12 is generally rectangular reinforcement 15 for the chambers or tubes of the apparatus. Reinforcement 15 which is the same for both ends of lower tube 17 and the other tubes of cylinders 18, 19, 20 and 21 of the apparatus, includes end plate 23 welded to and surrounding the end of each tube. Also welded to end plate 23 and shown best in Fig.
4 are narrow upper and lower bars 24 and 25 which with the side bars 26 and 27 provide a box-like support structure at each end of the tube. Via suitable fasteners in the upper and lower bars 24 and 25, each tube is fastened to another and thus vertically supported to form the appar-atus starting from its base support 11.
Surrounding each tube of the apparatus is a steam ~acket 29 that extends between the end plates 23. Suit-able pipes 30 having attached flanges provide steam com-munication with ~acket 29 to thus heat each tube wherein the internal temperature may vary between the tubes from approximately 180F to 280F for the apparatus 10. The steam may vary from 110 P.S.I. and 320F to 150 P.S.I.
l~a~s4 and 365F and somewhat higher.
As shown best in Figs. 1 and 2, the material to berendered is introduced into the apparatus 10, in an air free state by preferably a piston type pump at flanged opening 30a at the left end of top tube 21. The material flow is in the general direction of solid line arrows through tube 21 into tube 20 below and hence, the length of tube 20 and down through the apparatus with eventual dis-charge at the discharge end of tube 17. As noted previously, the actual material flow is in a spiral fashion through each tube because of the agitation. A suitable air lock at the discharge end of tube 17, which may be a stand pipe, is required to maintain the vacuum, which may be 6 - 10 inches of H2O in the tubes.
Because of the sequential movement of the material through the tubes, varying end covers are provided. As shown generally in Figs. 1 and 2, each tube has a discharge end and an inlet end. Since the tubes are identical, as are the discharge ends except for hand, the discharge end of tube 18 will be described along with the inlet end of tube 17 associated therewith as shown in Fig. 4. It is to be noted that the covers selected depend upon the later to be des-cribed agitator rotation and vent connections to the mani-folds. As noted in Fig. 2, by the arrows, the rotation is clockwise for each tube with each agitator being driven by independent drives at approximately 50 R.P.M. for the apparatus described.
Figs. 4 and 5 show on a larger scale, the discharge end of tube 18. Cover 31 is removably fastened to end plate 23 by bolts 32 and nuts 34 with a gasket 35 therebetween. Cover 31 has an opening 36 therethrough in its bottom portion and ~'99494 thus in communication with the bottom portion of the tube orchamber. Opening 36 has a lower curved surface 37 that is generally aligned with the inner periphery of tube 18 and starts from a vertically extending surface 38 on one side of the vertical centerline of the tube and extends upwardly on a radius to above the horizontal centerline of the tube and on the opposite side of the vertical centerline thereby following the direction of rotation of the agitator. Vertical surfaces 38, 39, and 40, with essentially horizontal surfaces 41, 42, and 44 define a generally crescent shaped opening with a lower portion and an upper portion for the travel of rotatably agitated material to pass out of tube 18. Surround-ing opening 36 and welded to cover 31 and thus forming a part thereof, is discharge chute 45. Chute 45 has a flanged surface 46 that is located generally on the same side of the cover and hence tube vertical centerline as upper section of opening 36 and as the later to be described inlet cover.
Chute 45 also has a pad 48 on an exterior thereof for supporting pillow block bearing 49 for the agitator 50.
Agitator 50 has a longitudinally extending shaft 51 which is sealingly located in cover 31 by a stuffing box type seal 53. Mounted on cover 31 adjacent the lowest part of opening 36 is adjustable dam or gate 54 which controls the flow of material through tube 18. Access to gate 54 is had through aperture 55 in chute 45 which is closed by cap 56 via suitable fasteners. Also a part of cover 31 is upper vent opening 57 located in the upper portion of cover 31. Shown in dotted lines in Figure 4 and in solid lines in Fig. 1, is angle mount 59 of agitator 50. Each angle mount includes 4 spaced angles mounted on a supporting cluster which is keyed to shaft 51. The angles are located 1~99494 The angles are located on the shaft depending upon its rota-tion. As shown in Fig. 4, the angles are designed to rotate down into the material to be rendered which on start up may to cover the lower quarter of the tube, and by centrifugal force maintain the material about the periphery of the tube.
Some 4 spaced angle mounts are mounted on shaft 51 inter-spersed by 4 radially offset at preferably 45 but similar angle mounts 60. The angles of both angle mounts overlap longitudinally as shown in Fig. 1 which allows more angles(8) in ~e internal tube area. Due to the size of the material to be rendered, materials located in the clearance of the revolution between the angle and tube inner wall are com-pressed and thus moved longitudinally thereby assisting in the longitudinal travel of material through the tube which is particularly useful on discharge.
Referring to Fig. 6, therein is shown cover 61, which defines the inlet for tube 17 and which is in communication with the discharge of tube 18. Cover 61 is closed in its bottom portion but has upper opening 62 which extends a substantial portion of the width of cover 61. Below open-ing 62 is support plate 64 attached to cover 61 and mounted thereon is pillow block bearing 65 for shaft 51 of agitator 50. A suitable stuffing box seal seals the shaft 51 where same extends through cover 61.
As best shown in Figs. 4 and 2, the material transition conduit 67 is attached to surface g6 of chute 45 of discharge cover 31 by suitable fasteners and extends downwardly to attach to vent transition 68 of cover 61. Transition 68 is preferably a weldment made from 8 guage hot rolled steel.
Transition 68 has a large rectangular flanged surface 69 that is constructed to enclose opening 62 of tube 17.
_g_ , ~99494 Transition 68 also has an upper opening aligned with transi-tion conduit 67 and located on the same side of the vertical centerline for tubes 17 and 18 and the balance of the tubes.
Material can thus flow in the direction of the arrow through the transitions, which are welded together, vertically downward and enter into tube 17 through one side of opening 62. The other side of opening 62 is connected via vent portion 69a of transition 68 which extends away from tube 17 and has a flanged surface 70 which is adapted via fasteners to be connected to a vent system 71. Also connected to vent system 71 is vent transition72 which is attached to discharge cover 31 and encompasses upper opening 57. Vent transition 72 is similar to transition 68 but does not have the opening for the material travel. Only venting is per-formed via opening 57.
Vent system 71 for removing the product steam via the broken line arrows is shown best in Figs. 1 - 3. Vent system 71 consists of dual vertical manifolds 73 and 74 with an upper horizontal manifold 75 connecting same. Each tube 17 - 21 is vented at both ends at the adjacent vertical manifold. As shown best in Figs. 1 and 3, exemplary mani-fold 73 is supported on ~e apparatus 10 formed from the tubes by various structural members. One of the members, base plate 76 is attached by fasteners to support 11.
Channel 78 is attached to base plate 76 and extends upwardly to a position short of tube 21 and is supported in the ver-tical position by angles 79, 80, and 81, with 81 welded to plate 82 which is bolted to reinforcing member 15. Angle 79 is bolted to channel 78, thereby connecting manifold 73 to the apparatus. Similar lower structural members also provide support to manifold 73. Manifold 74 is similarly supported on the other side of apparatus 10 with manifolds ~(~9~9494 73 and 74 supporting manifold 75 which is connected to con-ventional condenser 84.
Referring to Fig. 1, schematically shown therein, is a water containing stand pipe pump 85 connected to manifold 73 by a pipe as large in diameter as the raw feed pipe to collect solid carry over material and which also serves as a positive pressure relief and a vacuum relief. Manifold 74 is intended to have a similar stand pipe pump (not shown).
Also a part of the apparatus, and shown schematically in Fig. 3, is a suitable air lock to maintain the vacuum applied to the vent system while discharging fat and crack-lings which is also of the standpipe variety. The standpipe arrangement incluaes a holding tank 86 extending below stand-pipe 87 connected to the discharge of lower tube 17. Tank 86 which has a drain 88, maintains a desired level of fluid fat therein that is above the lower end of the standpipe.
A conveyor 89 is provided to move the solids from tank 86.
A conventional add fat conduit 90 extending between holding tank 86 supplies fat as needed to opening 30 via an adjust-able speed pump 91 to prevent high protein glue from sticking to the tube inner surfaces.
In operation, raw animal material is fed in an air free state into flanged opening 30a connected to tube 21 which is otherwise identical to tube 17 and is heated by jacket 29.
Simultaneously via a vent portion, product steam is vented to manifold 74 connected via top manifold 75 to condenser 84. Agitator 50 rotating in a clockwise direction lifts the material from the tube bottom via angle mounts 59 and 60 and by centrifugal force throws same about the periphery of the inner tube circumference to be heated by the jacket. As the material continues to move into the tube, and due in part to 1~99494 the agitator action, the material moves in a spiral fashion through tube 21 toward the discharge end. The product steam, which occupies most of the tube volume, due to the agitator action and the vacuum, moves in a spiral fashion toward manifold 74 at the intake end and toward manifold 73 at the discharge end. At the discharge end of tube 21 (see Fig. 3) a certain amount of material is retained in the tube by the gate, thereby controlling the flow, and the balance moves down into tube 20 with simultaneous venting of steam to manifold 73. At this point it might be noted that the material held back by the dam is also being continuously removed to prevent overcooking. The material then moves sequentially through the length of the tubes down through the apparatus. It is to be noted that the discharge end of tube 21 is identical to discharge end of tube 18 except for hand and hence will be detailed in connection with tube 18.
When the material reaches the discharge end of tube 18 as shown best in Figs. 1, 4, and 5, gate 54 retains an amount of constantly renewed material in tube 18. The material is continually being moved about the periphery of the inner circumference of the tube. At the opening 36 in cover 31, the material enters same and as the agitator advances also moves out the upper curved portion of the opening via discharge chute 45 and transitions 67 and 68 into tube 17 on the same side of the centerline as chute 45.
Simultaneously steam is vented from tube 18 via vent tran-siston 72 to vertical manifold 74. Also vent portion 69a ~ -conducts steam from tube 17 via the part of opening 62 (not occupied by material) into manifold 74. The material then 1~999L94 moves to the discharge end of tube 17 where it leaves the tube while the air lock maintains the vacuum condition in the apparatus. At this end also, venting of product steam occurs to manifold 73.
In a 5 tube apparatus as shown in Fig. 1 with each tube having dimensions of 36 inches O.D. and 34 inches I.D.
with a length of 20 ft., 21,000 lbs. per hour of raw material were cooked with an evaporation rate of 11,700 lbs. per hour, which as mentioned previously represents double the output of 6 - 24 inches O.D. 22 inches I.D. 20 ft. long tubes with only a 53% increase in area.
Having thus described the invention, it will be clear to those skilled in the art that various changes and modifi-cations can be made without departing from the spirit of the invention or the scope of the appended claims.
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A continuous rendering apparatus of the type comprising: a plurality of generally horizontal cylinders having opposed end walls and arranged one above the other, connection means intercoupling the discharge end of each cylinder and the entry end of the cylinder therebeneath, the discharge end of each cylinder being adjacent the entry end of the cylinder therebeneath, whereby the material to be rendered passes sequentially and downwardly through said cylinders, heating means for heating each cylinder, elongated agitator means rotatably positioned in each cylinder for moving the material about the inner circumference of each cylinder, vent means from each cylinder for venting the vaporized moisture, vacuum means connected to each of said vent means for creating a vacuum in each of said cylinders, and seal means connected to a discharge pipe of the lowest cylinder for preserving the vacuum in said cylinders, wherein the improvement comprises: said connection means including a discharge opening in the exit end wall of each cylinder, an inlet opening in the entry end wall of the cylinder therebeneath, and a discharge chute for each discharge opening, each chute extending beyond the ends of said cylinders and intercoupling a respective discharge opening with the inlet opening therebelow; said discharge opening being generally L-shaped and having a curved surface extending only along a portion of the lower half of the cylinder and generally aligned with the inner periphery thereof and said opening extending over only a portion of the lower half of said cylinder with its highest point being on said curved surface in the direction of rotation of said agitator means.
2. A continuous rendering apparatus of the type comprising: a plurality of generally horizontal cylinders having opposed end walls and arranged one above the other, connection means intercoupling the discharge end of each cylinder and the entry end of the cylinder therebeneath, the discharge end of each cylinder being adjacent the entry end of the cylinder therebeneath, whereby the material to be rendered passes sequentially and downwardly through said cylinders, heating means for heating each cylinder, elongated agitator means rotatably positioned in each cylinder for moving the material about the inner circumference of each cylinder, vent means from each cylinder for vent-ing the vaporized moisture, vacuum means connected to each of said vent means for creating a vacuum in each of said cylinders, and seal means connected to a discharge pipe of the lowest cylinder for preserving the vacuum in said cylinders, wherein the improvement comprises: said connection means including a discharge opening in the exit end wall of each cylinder, an inlet opening in the entry end wall of the cylinder therebeneath, and a discharge chute for each discharge opening, each chute extending beyond the ends of said cylinders and intercoupling a respective discharge opening with the inlet opening there-below; said discharge opening having a curved surface extending only along a portion of the lower half of the cylinder and generally aligned with the inner periphery thereof and said opening extending over only a portion of the lower half of said cylinder with its highest point being on said curved surface in the direction of rotation of said agitator means; said opening being generally L-shaped with a generally vertical leg and a generally horizontal leg, said generally vertical leg extending upwardly along said curved surface to a point approximately on the horizontal diameter of said cylinder, said generally horizontal leg extending from the bottom of said vertical leg away from said curved surface a distance less than the full diameter of said cylinder.
3. The apparatus of claim 2 in which each of said agitator means comprises: a shaft located in a cylinder and rotatably mounted on the exterior of the cylinder end walls, said shaft having a plurality of paddle elements mounted thereon located inside and extending substantially the full length of the cylinder.
4. The apparatus of claim 3 in which said plurality of paddle elements are located generally parallel to said shaft and consist of clusters of paddle elements longitudinally spaced along said shaft and connected to said shaft at radially spaced intervals with the paddles of one cluster overlapp-ing another longitudinally.
5. The apparatus of claim 4 in which said cylinder end walls are removable covers and the heating means is a steam jacket that surrounds and extends substantially the entire length of each cylinder.
6. The apparatus of claim 5 further comprising a gate removably located in each discharge for controlling the flow of material through each cylinder.
7. Apparatus according to claim 2 in which vent means are located in both ends of each cylinder.
8. Apparatus according to claim 7 in which each inlet opening of each cylinder is located in the upper portion of the entry end wall and each vent means at the entry end is located in the upper portion of the entry end wall in spaced relationship to said inlet opening.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US72040776A | 1976-09-03 | 1976-09-03 | |
| US720,407 | 1976-09-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1099494A true CA1099494A (en) | 1981-04-21 |
Family
ID=24893922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA283,249A Expired CA1099494A (en) | 1976-09-03 | 1977-07-21 | Rendering apparatus |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5331707A (en) |
| AR (1) | AR214891A1 (en) |
| AU (1) | AU509151B2 (en) |
| BE (1) | BE858379A (en) |
| BR (1) | BR7705761A (en) |
| CA (1) | CA1099494A (en) |
| DE (1) | DE2737451A1 (en) |
| DK (1) | DK143409C (en) |
| FR (1) | FR2363624A1 (en) |
| MX (1) | MX145762A (en) |
| NZ (1) | NZ184736A (en) |
| SE (1) | SE426075B (en) |
| ZA (1) | ZA774461B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113729473A (en) * | 2020-05-29 | 2021-12-03 | 佛山市顺德区美的电热电器制造有限公司 | Cooking method and cooking device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3938072A1 (en) * | 1989-02-20 | 1990-08-23 | Fettverarbeitung Geldern Mbh G | Melting and vacuum drying crude animal fat - at min. temp. to prevent brown discoloration |
| CN113693457A (en) * | 2021-09-16 | 2021-11-26 | 杭州老板电器股份有限公司 | Steaming oven with oil refining function and refining control method of animal fat |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB418107A (en) * | 1934-03-09 | 1934-10-18 | Aage Nyrop | Process and device for extracting fats and oils from animal and vegetable material |
| US3282972A (en) * | 1962-08-22 | 1966-11-01 | Acme Process Equipment Company | Method for the continuous rendering of organic material |
| US3410882A (en) * | 1963-12-09 | 1968-11-12 | Hormel & Co Geo A | Process and apparatus for continuous rendering operations |
| US3782902A (en) * | 1968-12-16 | 1974-01-01 | D Madsen | Apparatus for rendering |
-
1977
- 1977-07-21 CA CA283,249A patent/CA1099494A/en not_active Expired
- 1977-07-22 ZA ZA00774461A patent/ZA774461B/en unknown
- 1977-07-25 NZ NZ184736A patent/NZ184736A/en unknown
- 1977-07-28 AU AU27403/77A patent/AU509151B2/en not_active Expired
- 1977-08-10 AR AR268750A patent/AR214891A1/en active
- 1977-08-19 DE DE19772737451 patent/DE2737451A1/en not_active Withdrawn
- 1977-08-30 BR BR7705761A patent/BR7705761A/en unknown
- 1977-09-01 FR FR7726579A patent/FR2363624A1/en active Granted
- 1977-09-02 BE BE180660A patent/BE858379A/en not_active IP Right Cessation
- 1977-09-02 JP JP10621877A patent/JPS5331707A/en active Pending
- 1977-09-02 SE SE7709888A patent/SE426075B/en unknown
- 1977-09-02 DK DK391577A patent/DK143409C/en not_active IP Right Cessation
- 1977-09-02 MX MX170445A patent/MX145762A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113729473A (en) * | 2020-05-29 | 2021-12-03 | 佛山市顺德区美的电热电器制造有限公司 | Cooking method and cooking device |
| CN113729473B (en) * | 2020-05-29 | 2022-04-26 | 佛山市顺德区美的电热电器制造有限公司 | Cooking method and cooking device |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2740377A (en) | 1979-02-01 |
| DK391577A (en) | 1978-03-04 |
| AR214891A1 (en) | 1979-08-15 |
| FR2363624B1 (en) | 1982-04-02 |
| MX145762A (en) | 1982-03-29 |
| DE2737451A1 (en) | 1978-03-09 |
| ZA774461B (en) | 1978-06-28 |
| FR2363624A1 (en) | 1978-03-31 |
| JPS5331707A (en) | 1978-03-25 |
| SE426075B (en) | 1982-12-06 |
| AU509151B2 (en) | 1980-04-24 |
| DK143409C (en) | 1981-12-21 |
| SE7709888L (en) | 1978-03-04 |
| DK143409B (en) | 1981-08-17 |
| BR7705761A (en) | 1978-05-30 |
| BE858379A (en) | 1978-03-02 |
| NZ184736A (en) | 1980-04-28 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |