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Recovery device and recovery method for lyocell fiber spinning dope waste

A technology of spinning dope and recovery device, which is applied in the fields of rayon recycling, textile and papermaking, fiber chemical characteristics, etc., and can solve the problem that the spinning dope waste cannot be recycled.

Active Publication Date: 2016-10-05
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for recycling Lyocell fiber spinning dope waste to solve the problem that spinning dope waste cannot be recycled in the prior art

Method used

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  • Recovery device and recovery method for lyocell fiber spinning dope waste
  • Recovery device and recovery method for lyocell fiber spinning dope waste
  • Recovery device and recovery method for lyocell fiber spinning dope waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The amount of waste generated is 150kg / h, and the discharge is 3h

[0043] For discharge, use the pressure in the spinning dope pipeline to install an extrusion device with a small hole array at the discharge port. The diameter of the extrusion hole is 6mm, the number of holes is 20, the center distance of the holes is 18mm, and the area of ​​the holes is 80cm 2 . The waste material is extruded into strips with a diameter of 8-10 mm through the device.

[0044] After cooling, the thin strips of waste material fall into the long water tank located under the extrusion device, adjust the circulating water flow to drive the waste material to the shredder inlet at the other end of the water tank, and the moving speed of the waste material in the water flow is 0.2m / s , the length of the tank is 2m.

[0045] Shredding, using a shredder to shred the strip waste into granules with a particle size of 8-15mm, the granules fall into the stainless steel mesh basket located below ...

Embodiment 2

[0048] The amount of waste generated is 2000kg / h, and the discharge is 3h

[0049] For discharge, use the pressure in the spinning dope pipeline to install an extrusion device with a small hole array at the discharge port. The diameter of the extrusion hole is 8mm, the number of holes is 133, the center distance of the holes is 24mm, and the area of ​​the holes is 820cm 2 . The waste material is extruded into strips with a diameter of 10-12 mm through the device.

[0050] After cooling, the strip-shaped waste material falls into the long water tank located under the extrusion device, and the circulating water flow is adjusted to drive the waste material to move to the shredder inlet at the other end of the water tank. The moving speed of the waste material in the water flow is 0.3m / s , the length of the tank is 4m.

[0051] Shred, use a shredder to shred the strip waste into 10-20mm granules, the granules fall into the stainless steel mesh basket located below the discharge...

Embodiment 3

[0054] The amount of waste generated is 5000kg / h, and the discharge is 3h

[0055] For discharge, use the pressure in the spinning dope pipeline to install an extrusion device with a small hole array at the discharge port. The diameter of the extrusion hole is 10mm, the number of holes is 206, the center distance of the holes is 40mm, and the area of ​​the holes is 3600cm 2 . The waste material is extruded into strips with a diameter of 12-16 mm through the device.

[0056] After cooling, the strip-shaped waste material falls into the long water tank located under the extrusion device, and the circulating water flow is adjusted to drive the waste material to move to the shredder inlet at the other end of the water tank. The moving speed of the waste material in the water flow is 0.5m / s , the length of the tank is 5m.

[0057] Shredding, using a shredder to shred the strip waste into 12-30mm granules, the granules fall into the stainless steel mesh basket located below the d...

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Abstract

The invention provides a recycling device and a recycling method for Lyocell fiber spinning dope waste. The recovery unit includes waste pipeline, cooling unit, crushing unit and leaching unit. Wherein the waste pipeline has a spinning dope waste inlet and a spinning dope waste outlet, the spinning dope waste inlet is connected with the spinning dope waste output device; the cooling device has a cooling material inlet and a cooling material outlet, and the cooling material inlet is connected to the spinning dope waste output device. The waste material outlet is connected; the crushing device has a crushing material inlet and a crushing material outlet, and the crushing material inlet is connected to the cooling material outlet; the leaching device has a leaching material inlet, an NMMO leaching solvent inlet, a leaching liquid outlet and a leaching slag outlet, and the leaching material inlet and crushing and the waste material outlet of the waste material pipeline is provided with a plurality of extrusion holes. The recovery device can effectively recover the NMMO solvent in the waste material of the Lyocell fiber spinning stock solution, thereby reducing the manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of organic matter recovery, in particular to a recovery device and a recovery method for Lyocell fiber spinning dope waste. Background technique [0002] Lyocell fiber is a cellulose fiber that is wet-spun with N-methylmorpholine-N-oxide (NMMO) as a solvent. Its production process is to mix cellulose pulp in a certain proportion of NMMO / H 2 Dissolve in O solvent to obtain spinning dope. The spinning dope is heated up and pressurized, and then spun through the spinning hole to form it, and then the NMMO in the cellulose is dissolved and released in a water bath, and the cellulose is solidified to obtain the Lyocell precursor. Finally, the residual NMMO solvent in the raw silk is removed by washing with water, and the finished Lyocell fiber filament is obtained. During the entire production process, basically no chemical substances harmful to health or the environment are produced. [0003] However, NMMO is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F13/02
CPCD01F13/02Y02P70/62
Inventor 程鹏李克元蔡剑杨聪房凯
Owner CHINESE TEXTILE ACAD
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