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Rotary drier for plants for the production of bituminous macadams with the use of recycled materials

A rotary dryer, bituminous gravel technology, applied in the direction of roads, road repairs, roads, etc., can solve the problems of not being able to ensure good mixing of hot aggregates and cold cutting materials, harmful to the environment, uneven temperature distribution of cutting materials, etc.

Active Publication Date: 2012-05-23
AMMANN ITAL SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] A second disadvantage of the prior art devices lies in the fact that they do not ensure a good mixing of the hot aggregate and the cold cutting material added, which means that the temperature distribution in the cutting material is very uneven, resulting in Formation of emissions harmful to the environment

Method used

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  • Rotary drier for plants for the production of bituminous macadams with the use of recycled materials
  • Rotary drier for plants for the production of bituminous macadams with the use of recycled materials
  • Rotary drier for plants for the production of bituminous macadams with the use of recycled materials

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Embodiment Construction

[0033] With reference to these figures, reference number 1 generally shows a rotary dryer for a plant for the production of asphalt macadam from recycled materials, made according to the invention. As is known, a dryer 1 comprises a first hollow rotating cylinder 2 comprising a first end 3 , a second end 4 and an axis of rotation 5 extending from the first end 3 to the second end 4 .

[0034] Although not shown in these figures, at least in operation, the axis of rotation 5 is inclined such that the first end 3 and the second end 4 are at different heights above the ground. Advantageously, the angle of the axis relative to the horizontal is on the order of a few degrees (typically between 2° and 6°), so that the cylinder 2 is practically reclining.

[0035] In addition, the cylinder 2 has a predetermined direction of rotation, which is referred to in the illustrated embodiment Image 6 For counterclockwise direction. The cylinder 2 can be made to rotate by means of two supp...

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Abstract

A rotary drier for plants for the production of bituminous macadams with the use of recycled materials comprises a hollow rotary cylinder (2), heating means (9) connected to one end (4) of the cylinder (2), an aggregates infeed section (7) connected to one end (3), (4) of the cylinder (2), and a dried material outfeed section (8) connected to the other end (3), (4), an insertion section (24) for inserting recycled material into the cylinder (2), the insertion section being connected to an intermediate portion of the cylinder (2). The inside of the cylinder (2) is axially divided into a first, convection heat exchange zone (12), equipped with material tipping blades (14), and into a second, radiation and conduction heat exchange zone, and the cut material insertion section (24) is positioned inside the first heat exchange zone (12).; A first group (25) of tipping blades (14) is mounted circumferentially inside the cylinder (2) between the insertion section (24) and the second heat exchange zone (13).

Description

technical field [0001] The invention relates to a rotary dryer of the type stated in the preamble of claim 1 for a plant for producing asphalt macadam from recycled materials. Background technique [0002] A dryer of this type comprises a hollow rotating cylinder which, at least in operation, is inclined such that its two ends are at different heights relative to the ground. Overall, the angle of the axis relative to the horizontal is on the order of a few degrees. [0003] Attached to one end of the cylinder are heating means, usually consisting of a burner producing a flame extending inside the cylinder. [0004] The combustion fumes then pass through the remainder of the cylinder and to a chimney which is usually connected to the end of the cylinder opposite the end connected to the burner. [0005] In addition, at both ends of the cylinder there is connected an inlet section through which the aggregate to be dried is inserted and an outlet section through which the tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/10
CPCE01C2019/1095E01C19/1036E01C2019/109
Inventor F·马莫利
Owner AMMANN ITAL SPA