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Device and method for recovering organic solvent in flammable and explosive high-viscosity polymer waste

A high-viscosity polymer, flammable and explosive technology, applied in the field of organic solvents, can solve the problems of inability to recover solvents, flash explosions, environmental pollution, etc., and achieve the effects of improving air pollution, reducing pollution, and reducing production costs

Active Publication Date: 2020-08-04
SINOPEC YIZHENG CHEM FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since more than 90% of this flammable and explosive high-viscosity polymer is an organic solvent, the prior art cannot recycle the solvent in this polymer, but uses a vacuum calciner for calcination to dispose of these waste materials. All the compounds are discharged into the atmosphere and sewage, a large amount of solvents are wasted, and even cause serious environmental pollution
Due to the use of ordinary calciners for calcination, open flames exist at high temperatures, and flash explosions often occur during heating and calcination, so there are serious safety hazards in the process of disposing of these wastes

Method used

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  • Device and method for recovering organic solvent in flammable and explosive high-viscosity polymer waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: The production of high-performance fibers requires replacement of components and melt filters every 7 days. There is about 0.25 kg of melt in each component and about 15 kg of melt in each filter. This embodiment is a device for recovering organic solvents in flammable and explosive high-viscosity polymer waste, which can process 50 components and 2 filters each time. The system can process about 42.5 kg of melt in total and recover 80% of the solvent.

[0020] Such as figure 1 As shown, it includes far-infrared furnace, buffer tank, filter, condenser, solvent recovery tank, booster pump, and circulating water tank. Among them, far-infrared furnace, buffer tank, filter, and condenser are connected in sequence, and the condenser is connected to solvent recovery. The tank is connected to the water tank through a vacuum pump, and the side of the water tank has an overflow port. In this embodiment, the vacuum pump is a water ring vacuum pump, which is connected ...

Embodiment 2

[0028] Embodiment 2: roughly the same as Embodiment 1, the difference is that the outer surface of the silicon carbide plate is provided with a refractory brick insulation material with a thickness of 100mm. When the vacuum degree of the system reaches an absolute pressure of 8KPa, the far-infrared furnace starts to heat, and the heating The temperature is set to about 160°C, and the heating time is 10h.

Embodiment 3

[0029] Embodiment 3: roughly the same as Embodiment 1, the difference is that the outer surface of the silicon carbide plate is provided with a rock wool insulation material with a thickness of 400mm. When the vacuum degree of the system reaches an absolute pressure of 15KPa, the far-infrared furnace starts to heat, and the heating The temperature is set to about 180°C, and the heating time is 0.5h.

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Abstract

The invention discloses a device and method for recovering organic solvents in flammable and explosive high-viscosity polymer waste. Far-infrared furnaces, buffer tanks, filters, and condensers are connected in sequence, and the condenser is connected to the solvent recovery tank at the same time through a vacuum pump. The water tank has an overflow port on the side of the water tank; the heating element of the far-infrared furnace is a silicon carbide plate that is arranged outside the furnace and coated with far-infrared paint. Paste the outer wall of the far-infrared furnace. The invention recycles the waste slurry block and the solvent in the flammable and explosive materials adhering to the metal surface by heating and condensing in a vacuum state, and adopts a far-infrared furnace to heat, and the furnace is evenly heated without local high temperature and open flame. There will be no flash explosion phenomenon, the waste slurry block and the flammable and explosive melt material adhered to the metal surface are separated under high vacuum and high temperature, and the flammable and explosive organic solvent evaporated from the separation is condensed into liquid and collected Reuse enables the spinning solvent to be recycled, reduces raw material consumption, and lowers production costs.

Description

technical field [0001] The invention relates to an organic solvent, in particular to a method for recovering the organic solvent. Background technique [0002] The production of high-performance chemical fibers generally uses flammable and explosive organic solvents as raw materials, and is blended into a flammable, explosive, and high-viscosity polymer for spinning. In the production, flammable, explosive, and high-viscosity polymer waste will inevitably be produced. This material adheres to the surface of the metal equipment through which the wire melt passes. Since more than 90% of this flammable and explosive high-viscosity polymer is an organic solvent, the prior art cannot recycle the solvent in this polymer, but uses a vacuum calciner for calcination to dispose of these waste materials. All the compounds are discharged into the atmosphere and sewage, a large amount of solvents are wasted, and even serious environmental pollution is caused. Due to the use of ordinary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D5/00B01D50/00F27B14/06F27B14/14B09B3/00B09B5/00
CPCB01D5/00F27B14/06F27B14/14B09B3/00B09B5/00B09B3/40B01D50/20
Inventor 沈云周桂存杨勇张长城张其宝刘锦江沈睿
Owner SINOPEC YIZHENG CHEM FIBER
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