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Dehumidification methods for materials in granular form

A particle form, hopper technology, applied in the field of dehumidification of particle form materials

Active Publication Date: 2014-10-29
MORETTO SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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This makes the system less efficient

Method used

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  • Dehumidification methods for materials in granular form
  • Dehumidification methods for materials in granular form
  • Dehumidification methods for materials in granular form

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Experimental program
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Embodiment approach

[0046] According to a general embodiment of the invention, the dehumidification device 1 comprises:

[0047] - an air distribution loop comprising at least one common supply line 2 and one common return line 3;

[0048]- a plurality of dry air generators 11, 12, 13, 14 connected in parallel to the two common supply lines 2 and the common return line 3;

[0049] - one or more hoppers 21 , 22 , 23 , 24 connected side by side to said common line 2 , 3 and adapted to contain granular material, especially plastic material, for dehumidification before feeding into the processing machine M ;with

[0050] - Electronic management and control unit 4 of the device 1 .

[0051] The plant 1 comprises a first valve 31 ′, 32 ′, 33 ′, 34 ′ and a second valve 31 ″, 32 ″, 33 ″, 34 ″ respectively downstream and upstream of each generator 11 , 12 , 13 , 14 , which The valves are automatically controlled by the aforementioned management and control unit 4, so as to fluidly disconnect or connec...

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Abstract

The present invention regards a method and a plant for the dehumidification of materials in granular form, particularly of plastic materials. The method comprises the following operating steps: a) providing a number of dry air generators and hoppers containing granular material; b) for each dry air generator evaluating the dry air flow generable and / or high energy efficiency functioning time; c) calculation of the dry air flow rate for each single hopper depending on the characteristics of the granular material; d) activation of a number of generators sufficient to deliver a total dry air flow rate equal to the sum of the flow rates required by the hoppers, the number of said generators and the generators to be activated being chosen depending on the flow rate deliverable by each and / or by their respective ranges of functioning at high energy efficiency according to an energy saving logic; and e) deactivation of the remaining generators.

Description

technical field [0001] The invention relates to a method for dehumidifying granular materials and a dehumidifying device thereof, in particular to a method for dehumidifying granular materials composed of one or more plastic materials. Background technique [0002] In the processing of plastic materials, the dehumidification of plastic material particles before melting is extremely important. [0003] It is well known that plastic materials in granular form contain water molecules due to their hygroscopic properties. During the melting step, water molecules are incorporated into the molecular chains of the polymer. This will cause surface defects, blisters and poor structure and color homogeneity in the final product, thereby compromising the quality of the product. [0004] There are many kinds of dehumidification equipment of granular plastic materials on the market. Most involve the use of adsorption devices such as molecular sieves. [0005] Molecular sieves are kno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F26B21/12B29B13/06B01D53/26
CPCF26B21/12F26B21/04F26B21/083B29B9/16B29B13/065B29B7/826B29B7/60B29B7/728B01D39/00B01D53/1412B01D53/1425
Inventor 雷纳托·莫雷托
Owner MORETTO SPA