Method and device for recycling Freon from rigid foam insulating material of waste and old refrigerator and ice tank

A thermal insulation material and freon technology, applied in the field of separation and recovery of freon, can solve the problems of strong corrosion of equipment, high equipment maintenance and operation costs, waste gas treatment costs, toxic and harmful substances in thermal insulation materials, etc., to achieve efficient separation, avoid high energy consumption and environmental pollution. effect of the problem

Active Publication Date: 2011-11-23
AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrogen chloride and hydrogen fluoride are strong acid gases, which have a strong corrosive effect on equipment. In addition, toxic and harmful substances will be produced when insulation materials are incinerated, which requires high equipment maintenance and operation costs and waste gas treatment costs.

Method used

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  • Method and device for recycling Freon from rigid foam insulating material of waste and old refrigerator and ice tank
  • Method and device for recycling Freon from rigid foam insulating material of waste and old refrigerator and ice tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Put the granular hard foam insulation material (with a particle size range of 2 to 5mm) into the hopper 4 and connect the whole equipment. The No. 1 three-way valve 9 connects ab and closes c, and the second three-way valve 15 opens de and closes f , turn on the vacuum pump 14 to make the system in a vacuum state, the system pressure is 30Pa, turn on the No. 1 heating unit 5 and No. 2 heating unit 8 to heat the incoming material, the heating temperature is 100 ° C, turn on the motor 1, and use the screw feeder 7 to feed the hard The foam insulation material is slowly sent into the defluorination reactor 6;

[0036] 2. Incoming materials are subjected to heat preservation treatment in the defluorination reactor 6, the heat preservation temperature is 100°C, and the heat preservation time is 30 minutes;

[0037] 3. Set the condensation temperature of the condensation recovery machine 11 to 20°C, and the gas after condensation recovery treatment is filtered by the activ...

Embodiment 2

[0040] 1. Put the granular hard foam insulation material (with a particle size range of 2 to 5mm) into the hopper 4 and connect the whole equipment. The No. 1 three-way valve 9 connects ab and closes c, and the second three-way valve 15 opens de and closes f , turn on the vacuum pump 14 to make the system in a vacuum state, the system pressure is 20Pa, turn on the No. 1 heating unit 5 and No. 2 heating unit 8 to heat the incoming materials, the heating temperature is 120 ° C, turn on the motor 1, and use the screw feeder The foam insulation material is slowly sent into the defluorination reactor 6;

[0041] 2. Incoming materials are subjected to heat preservation treatment in the defluorination reactor 6, the heat preservation temperature is 120°C, and the heat preservation time is 1h;

[0042] 3. Set the condensation temperature of the condensation recovery machine 11 to 10°C, and the gas after condensation recovery treatment is filtered by the activated carbon adsorption box...

Embodiment 3

[0045] 1. Put the granular hard foam insulation material (with a particle size range of 2 to 5mm) into the hopper 4 and connect the whole equipment. The No. 1 three-way valve 9 connects ab and closes c, and the second three-way valve 15 opens de and closes f , turn on the vacuum pump 14 to make the system in a vacuum state, the system pressure is 10Pa, turn on the No. 1 heating unit 5 and No. 2 heating unit 8 to heat the incoming material, the heating temperature is 140 ° C, turn on the motor 1, and use the screw feeder The foam insulation material is slowly sent into the defluorination reactor 6;

[0046] 2. Incoming materials are subjected to heat preservation treatment in the defluorination reactor 6, the heat preservation temperature is 140°C, and the heat preservation time is 1.5h;

[0047] 3. Set the condensation temperature of the condensation recovery machine 11 to 0°C, and the gas after condensation recovery treatment is filtered by the activated carbon adsorption box...

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Abstract

The invention discloses a method and device for recycling Freon from rigid foam insulating material of waste and old refrigerators and ice tanks. The method comprises the following steps of: (1) crushing waste and old refrigerator and ice tank box overall in a closed container to obtain granular rigid foam insulating material, or disassembling to obtain the rigid foam insulating material; (2) slowly feeding the granular rigid foam insulating material into a defluorination reactor in a vacuum state by virtue of a spiral feeder, and heating the rigid foam insulating material in the spiral feeder and the defluorination reactor, wherein the heating temperature is controlled to be 100-160 DEG C; (3) insulating the rigid foam insulating material in the defluorination reactor at 100-160 DEG C for 0.5-2 hours, and condensing and recycling the rigid foam insulating material in a condensing and recycling machine, wherein the temperature of the condensing and recycling machine is controlled to be minus 20 DEG C to 20 DEG C; and (4) pumping the gas, which is subjected to condensing and recycling and is filtered by an activated carbon adsorption box, into the air by virtue of a vacuum pump. Byadopting the method and device for recycling Freon from waste and old refrigerator rigid foam insulating material, Freon can be thoroughly separated from the waste and old refrigerator freezer rigid foam insulating material, and the Freon can be collected and recycled.

Description

technical field [0001] The invention relates to a method and a device for recovering freon, in particular to a method and a device for separating and recovering freon from hard foam insulation materials of waste refrigerators and freezers. Background technique [0002] Since the middle and late 1980s, a large number of electronic and electrical products have entered Chinese households. Calculated based on the service life of 10 to 15 years, household appliances have reached the peak of elimination and scrapping since 2003. Relevant data show that the social ownership of refrigerators in my country has exceeded 150 million units, and the average annual scrap volume is more than 4 million units. Discarded refrigerators and freezers contain Freon and other substances harmful to the environment, which need to be properly disposed of. The freon in the refrigerator is mainly contained in the compressor and polyurethane hard foam insulation material. After research, it is found tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCY02W30/20Y02W30/82
Inventor 周益辉
Owner AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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