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Dryer-heat exchanger

A dryer and drying technology, which is applied in drying, drying machines, lighting and heating equipment, etc., can solve the problems of small component space size, high product material throughput, and low stacking density

Inactive Publication Date: 2003-06-04
BUHLER THERMAL PROCESSES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the component space size is small, which limits the high product material throughput under a long pause time
In addition, the product materials are relatively large and their bulk density is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The dryer-heat exchanger consists of a rectangular shell 1, which has a product material inlet 2 and a product outlet 3, as well as heating and cooling gas inlet and outlet pipes 4 and 5.

[0023] Inside, between the product material inlet 2 and the product outlet 3 is a channel for processing products. The channel has a plate 6 through which air can pass, which spans the entire width of the housing 1 and thus forms the boundary of the channel. If necessary, the plate 6 can also be installed to be flexible and movable so that the width of the channel can be adjusted. Advantageously, the plate 6 should be different according to its different tasks, such as dividing the gas flow or preventing dust from being blocked, but is different for gas entry and discharge. It has a corrugated or knife-shaped inner fitting (8) in the channel along the flow direction of the product material, and / or the plate 6 can itself be curved. The plate 6 itself also has openings 9 (holes, gaps, or g...

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PUM

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Abstract

The invention relates to a drier-heat-exchanger for heat-treating PET granulate and similar. Instead of the usual shaft covering the whole cross-section, the inventive drier only has a channel which is delimited by air-permeable sheets (6). This ensures that the product can pass through efficiently and evenly which in turn means that a higher gas speed can be used without the product being stirred up and therefore that shorter heating times are possible.

Description

Technical field [0001] The invention relates to a dryer or heat exchanger for drying or SSP (solid polycondensation) pretreatment (gradual heating without adhesion) of PET, PA, and PEN pellets, and can also be used to dry other loose particles material. Background technique [0002] The crystallization and post-condensation methods and equipment of PET in the solid state have long been familiar to everyone. The post-condensation (SSP) of PET in the solid state is carried out at a temperature above 200°C and lasts for several hours in a suitable reactor or dryer. The problem is how to obtain high-yield and high-quality materials with as little cost as possible. The process used is to discharge the reaction product material while completing the uniform heating of the PET. [0003] It is known to use top dryers (Daechertrockner) or column dryers for the SSP treatment of PET pellets. DE-A-4300913 gives a preheater with a top-shaped interior to get a uniform air flow in the countercur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B13/06C08J3/12F26B17/12
CPCB29B13/065F26B17/122B29B9/16F26B17/12
Inventor 汉斯·盖斯比勒菲利波·泰拉西
Owner BUHLER THERMAL PROCESSES