Drying process for Haidao superfine composite fiber slice

A technology of ultra-fine composite fiber and drying process, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, rayon manufacturing, etc., and can solve the problems of inability to dry, low melting point of polyester chips, and slow crystallization speed

Inactive Publication Date: 2002-12-11
辽阳天利海岛纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core of the sea-island ultrafine composite fiber production process is the chip drying process. The low-melting point polyester chip has a low melting point, slow crystallization speed, and is easy to agglomerate during the pre-crystallization process. The special physical properties determine that it is different from the conventional chemical fiber chip pre-crystallization and drying process. The process conditions are completely different, and the conventional drying process cannot be used for drying

Method used

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  • Drying process for Haidao superfine composite fiber slice
  • Drying process for Haidao superfine composite fiber slice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0012] The sea-island ultrafine composite fiber chip drying process is further explained in conjunction with the process flow chart.

[0013] Drying equipment, including high-level hopper 1, pre-crystallizer 2, agitator 3, drying tower 4, pre-crystallization fan 5, pre-crystallization heater 6, cyclone separator 7, crystallization air filter 8, fresh air filter 9, drying air Heater 10, Raphael nozzle 11, refrigerated dehumidifier 12, molecular sieve dehumidifier 13, air filter 14, pressure reducing valve 15, air release valve 16.

[0014] The slice drying process flow is that the pre-crystallization fan 5 sends the air filtered by the fresh air filter 9 into the pre-crystallization heater 6 for heating, and becomes a pre-crystallization hot air. In order to achieve the stability of the required air volume, the frequency of the pre-crystallization fan 5 is 22HZ. Crystallization hot air enters from the bottom of pre-crystallizer 2. The wet slices are sucked to the high-level ho...

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Abstract

The present invention relates to a composite superfine fiber slice drying process and apparatus. Filtered air is blown by a fan into heater and heated air is fed to pre-crystallizer from its bottom while slice is fed in from the upper part. The slice is pre-crystallized during the heat exchange with heat air, and pre-crystallized slice enters into the drying tower from the upper part while heatedair, which is produced through compression, dehumidifying, filtering, pressure reducing and heating, enters in from the bottom. Through full heat exchange, the slice is dried finally to a water content less than 300 ppm.

Description

(1) Technical field [0001] The invention belongs to a chemical fiber production process, in particular to a sea-island ultrafine composite fiber chip drying production process. (2) Background technology [0002] my country is a big country of chemical fiber production, with an annual chemical fiber production capacity of about 6 million tons. Among them, 80% of chemical fiber enterprises have small production scales and low-grade products, making it difficult to participate in international market competition. 40% of the raw materials used in domestic high-end clothing fabrics rely on imports. Fiber is the main raw material for the production of high-grade clothing fabrics. The so-called sea-island ultrafine composite fiber is made of polyester chips PET as the island component, and low-melting point polyester chips COPET as the sea component. It is extruded through a twin-screw extruder, and the metering pump is accurately metered. After conjugate spinning, the island compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B13/06D01F1/00
Inventor 周峰赵军车剑锋房瑞峰袁长福
Owner 辽阳天利海岛纤维有限公司
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