초록 ▼

A single pass, multiple stage, rotary drum heat exchange dryer (22) is provided for drying products such as distillers grains and includes a tubular shell (64) with a moist product inlet (66), an opposed dried product outlet (70), and an internal drying chamber (78). The chamber (78) includes a conv

A single pass, multiple stage, rotary drum heat exchange dryer (22) is provided for drying products such as distillers grains and includes a tubular shell (64) with a moist product inlet (66), an opposed dried product outlet (70), and an internal drying chamber (78). The chamber (78) includes a convection drying first stage (80), and conductive drying final curing stage (82) an intermediate stage (84); the stage (84) is subdivided into a plurality of preferably contiguous drying zones (86-92). The zones (86-92) include individual flighting assemblies (164, 214, 226, 234) which are of increasing density and present progressively increasing heat transfer ratios. Preferably, one of the initial zones has a heat transfer ratio of from about 1.5-2.5 ft-1,whereas another of the zones closer to the final stage has a heat transfer of from about 2.75-3.75 ft-1.

대표청구항 ▼

A single pass, multiple stage, rotary drum heat exchange dryer (22) is provided for drying products such as distillers grains and includes a tubular shell (64) with a moist product inlet (66), an opposed dried product outlet (70), and an internal drying chamber (78). The chamber (78) includes a conv

A single pass, multiple stage, rotary drum heat exchange dryer (22) is provided for drying products such as distillers grains and includes a tubular shell (64) with a moist product inlet (66), an opposed dried product outlet (70), and an internal drying chamber (78). The chamber (78) includes a convection drying first stage (80), and conductive drying final curing stage (82) an intermediate stage (84); the stage (84) is subdivided into a plurality of preferably contiguous drying zones (86-92). The zones (86-92) include individual flighting assemblies (164, 214, 226, 234) which are of increasing density and present progressively increasing heat transfer ratios. Preferably, one of the initial zones has a heat transfer ratio of from about 1.5-2.5 ft-1,whereas another of the zones closer to the final stage has a heat transfer of from about 2.75-3.75 ft-1. ding a core member having a first surface and a second surface; attaching a certain first material upon said first surface and upon said second surface, effective to form a first pre-circuit assembly; forming a first aperture within said first pre-circuit assembly; providing a first metal member having a first and a second surface and a second metal member having a first and a second surface; attaching a certain second material to said second surface of said first metal member and to said first surface of said second metal member; applying a certain liner material to said certain second material; engaging said first and second metal members; forming a second aperture through said engaged first and second metal members, through said certain second material, and through said certain liner material; separating said engaged first and second metal members; removing said certain liner material from said certain second material; selectively attaching said certain second material resident upon said first metal member to said certain first material resident upon said first pre-circuit assembly while causing said second aperture which is formed within said first metal member to communicate with said first aperture; selectively attaching said certain second material resident upon said second metal member to said certain material resident upon said first pre-circuit assembly while causing said second aperture which is formed within said first metal member to communicate with said first aperture; selectively removing said certain first and second metal members, effective to form a second pre-circuit assembly; providing third and fourth pre-circuit assemblies; attaching said third and fourth pre-circuit assemblies to said second pre-circuit assembly; and removing certain portions of said third and fourth pre-circuit assemblies, effective to form a third and fourth aperture which respectively communicate with said first and second apertures and which cooperate with said second pre-circuit assembly to form a circuit board having an aperture which extends through the formed circuit board. 2. The method of claim 1 wherein said core member comprises copper. 3. The method of claim 1 wherein said certain first material comprises epoxy. 4. The method of claim 1 wherein said certain second material comprises adhesive. 5. The method of claim 1 wherein said third pre-circuit assembly is formed by the process of: providing a member having a first surface and a second surface; applying a first electrically conductive material to said first surface and to said second surface of said member; selectively applying a photoresist material upon said certain portions of electrically conductive material; selectively removing certain portions of said first electrically conductive material, thereby exposing at least one portion of said first surface; applying a second electrically conductive material to said at least one portion of said first surface; and removing said photo resistive material, thereby forming a pre-circuit assembly. 6. The method of claim 1 wherein said second, third, and fourth apertures are substantially wider than said first aperture. 7. The method of claim 1 further comprising the step of placing electrically conductive material within said first, second, and third apertures. 8. A method for making a circuit board comprising the steps of: providing a first electrically conductive member having a first and a second surface; providing a second member having a first and a second surface; placing a dielectric material upon said first and second surface of said first electrically conductive member; forming a first aperture within said first electrically conductive member; placing an adhesive material upon said first surface of said second member; placing a liner material upon said adhesive material; providing a third member upon which a layer of said adhesive material is disposed; placing a layer of said liner