Process for producing regenerated polyester chip by using regenerated bottle chip and device thereof

A technology of polyester bottle flakes and recycled polyester, which is applied in the direction of single-component polyester rayon, rayon recycling, spinneret assembly, etc. Technological progress, rising prices of raw chips, etc., have achieved the effects of strong controllability of raw material quality, stable drying effect, and high recycling rate

Inactive Publication Date: 2012-10-17
北京德通化纤工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, with the rising international crude oil prices, as a downstream product of petroleum, the price of raw slices continues to rise, which seriously restricts the development of related industries in our country
[0003] At present, polyester chip products in the prior art are generally dominated by conventional varieties, with low differentiation rate and technical added value, which is not conducive to the technological progress of downstream industries
In addition, due to the wide application of polyester plastics, the "white pollution" caused by waste polyester plastics such as discarded Coke bottles and mineral water bottles has become a major social public hazard, causing environmental degradation and serious waste of resources

Method used

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  • Process for producing regenerated polyester chip by using regenerated bottle chip and device thereof
  • Process for producing regenerated polyester chip by using regenerated bottle chip and device thereof
  • Process for producing regenerated polyester chip by using regenerated bottle chip and device thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] see figure 1 , figure 2 and image 3 , a schematic diagram of the equipment layout used in the embodiment of the present invention, including sequentially setting a slicing bin 1, a centrifugal dryer 2, an underwater pelletizer 3, a 2# filter 4, a 1# filter 5, a screw extruder 6, a spinning Front silo 7, feeding cage 8, high-speed mixer 12, high-speed mixer 12 is provided with metering tank 11, metering tank 11 is provided with bottle flake bin 10, bottle flake bin 10 is provided with cyclone separator 9. Metering pump 4.1 is set between 2# filter 4 and 1# filter 5, casting head 4.2 is set on 2# filter 4, centrifugal dryer 2 is connected with vibrating screen 2.1 and Roots blower 2.2 in turn, and cyclone separation Device 9 is connected to the 2# large rotary outlet.

[0052] The models of each equipment in the embodiment of the present invention are: 5m feeding cage before entering the rotary drying system; The feeding twisted cage is 4.6m, the pre-spinning silo i...

Embodiment 2

[0061] A process for producing recycled polyester chips by utilizing recycled polyester bottle flakes, comprising the following steps:

[0062] (1) rotary drying:

[0063] The regenerated polyester bottle flakes with a good ratio are transported to the 1# and 2# large rotary in series through the feeding twisted cage for continuous drying until the moisture content of the bottle flakes is below 0.0100% after drying;

[0064] (2) High-speed mixing:

[0065] The bottle flakes after rotary drying are sent to the large silo of the pelletizing workshop by air from the rotary workshop, and then sent to the high-speed mixer for high-speed mixing for 4-5 minutes after being metered by the metering tank;

[0066] (3) Screw melting:

[0067] The bottle flakes discharged after high mixing are lifted to the pre-spinning silo through the feeding cage, and fully melted and extruded by the screw extruder;

[0068] (4) Secondary filtration:

[0069] The polyester melt extruded by screw me...

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Abstract

The invention discloses a process for producing a regenerated polyester chip by using a regenerated bottle chip and a device thereof. The device comprises a chip bin, a centrifugal dryer, an underwater granulator, a No.2 filter, a No.1 filter, a screw extruder, a pre-spinning bin, a feeding winch and a high-speed mixer in turn, wherein the high-speed mixer is provided with a metering tank; the metering tank is provided with the bottle chip bin; the bottle chip bin is provided with a cyclone separator; a metering pump is arranged between the No.1 filter and the No.2 filter; a casting band headis arranged on the No.2 filter; the centrifugal dryer is connected with a vibrating screen and a Roots blower in turn; and the cyclone separator is connected with a No.2 large rotary outlet air supply pipeline. The bottle chip is prepared into a chip finished product by rotary drying, high-speed mixing, screw melting, secondary filtration, casting band granulation, drying and screening, chipping and packing. The method and the device have the advantages of resource saving, environmental protection, low production cost, good production continuity, high yield and stable process control.

Description

technical field [0001] The invention belongs to the field of resource regeneration and discloses a process method for producing recycled polyester chips by using recycled polyester bottle flakes. Background technique [0002] Primary polyester chips are derived from petroleum and are petrochemical products. Its chemical name is polyethylene terephthalate (abbreviated as PET). The main raw material is petroleum. The esterification-polycondensation reaction produces polyester chips, which are used as raw materials for the manufacture of polyester bottles, polyester fibers and other polyester products. The production process consumes a lot of resources and energy. At the same time, with the rising international crude oil prices, as a downstream product of petroleum, the price of raw slices continues to rise, which seriously restricts the development of related industries in our country. [0003] At present, polyester chip products in the prior art are generally conventional va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B9/04B29B9/06B29B9/16B29B13/06B29B7/28B29C47/92B29C48/92
CPCB29B9/065B29B7/726B29B9/12B29B7/007B29B7/90B29B7/885B29C48/0022D01D4/00B29K2105/26B29K2067/00B29C48/388B29C48/69B29C2793/009B29C2793/0027B29C48/05B29C48/04D01F6/62D01F13/04
Inventor 于志强李吉星
Owner 北京德通化纤工业有限公司
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