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Equipment and method for thermal removing of paint layers of waste metals

A waste metal and paint layer technology, applied in the field of circular economy technology and environmental protection, can solve the problems of poor working environment, low treatment efficiency, serious paint dust, etc., and achieve high paint stripping efficiency, good environment and economic benefits, and uniform heating. Effect

Active Publication Date: 2014-02-05
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flue gas from the combustion of organic matter is discharged into the atmosphere through vacuum pipes, causing pollution
The utility model patent "Iron drum paint removal device" (application number 201220134821.0) discloses an iron drum paint removal device, which uses a polishing motor to remove the paint on the inner wall of the paint bucket; Difference
Chinese invention patent "A Pollution-free Continuous Treatment Equipment and Method for Oil-Containing Industrial Waste" (Patent No. ZL201110153527.4) discloses continuous treatment equipment and technology for oil-contained industrial waste, which can realize the removal of water and oil in industrial waste Removal, but does not involve removal of solid paint from scrap metal

Method used

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  • Equipment and method for thermal removing of paint layers of waste metals

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Open gate valve 1 (3) and gate valve 2 (7), put the crushed waste aluminum cans into the furnace tube (10) through the feed port (2) and feed bin (1), and start the furnace Pipe (10) rotates and heats the switch, controls the inclination angle of 0°, the speed of 0rad / min, and dries at 140°C for 30 minutes; after the drying is completed, close valve 2 (6), gate valve 2 (7), and valve 3 ( 8), gate valve 3 (13) and valve 5 (15), turn on the mechanical pump (11) and valve 4 (12) for vacuuming; when the pressure of the furnace tube (10) is lower than 200Pa, turn off the mechanical pump (11 ) and valve 4 (12), open valve 3 (8) to fill the furnace tube (10) with a controlled atmosphere, and the oxygen partial pressure is 0 atm; keep the furnace tube (10) at a speed of 0 rad / min, and increase the temperature at a rate of 5 °C / min. Heat the furnace tube (10) to 240°C for 90 minutes of thermal paint removal; after the paint removal is complete, close the valve 3 (8), open the ga...

example 2

[0029]Open gate valve 1 (3) and gate valve 2 (7), put the crushed waste aluminum cans into the furnace tube (10) through the feed port (2) and feed bin (1), and start the furnace Rotate the tube (10) and heat the switch, control the inclination angle to 10°, the speed to 5rad / min, and dry at 120°C for 5 minutes; after drying, close valve 2 (6), gate valve 2 (7), and valve 3 ( 8), gate valve 3 (13) and valve 5 (15), turn on the mechanical pump (11) and valve 4 (12) for vacuuming; when the pressure of the furnace tube (10) is lower than 200Pa, turn off the mechanical pump (11 ) and valve 4 (12), open valve 3 (8) to fill the furnace tube (10) with a controlled atmosphere, and the oxygen partial pressure is 0 atm; keep the furnace tube (10) at a speed of 5 rad / min, and increase the temperature at a rate of 8 °C / min. Heat the furnace tube (10) to 300°C for 60 minutes of thermal stripping; after the paint stripping is completed, close the valve 3 (8), open the gate valve 3 (13), rev...

example 3

[0031] Open gate valve 1 (3) and gate valve 2 (7), put the crushed waste aluminum cans into the furnace tube (10) through the feed port (2) and feed bin (1), and start the furnace Pipe (10) rotates and heats the switch, controls the inclination angle of 15°, the rotation speed of 10rad / min, and performs drying at 100°C for 10 minutes; after drying, close valve 2 (6), gate valve 2 (7), and valve 3 ( 8), gate valve 3 (13) and valve 5 (15), turn on the mechanical pump (11) and valve 4 (12) for vacuuming; when the pressure of the furnace tube (10) is lower than 200Pa, turn off the mechanical pump (11 ) and valve 4 (12), open valve 3 (8) to fill the furnace tube (10) with a controlled atmosphere, the oxygen partial pressure is 0.04atm; keep the furnace tube (10) at a speed of 10rad / min, and heat up at a rate of 10°C / min Heat the furnace tube (10) to 400°C for 45 minutes of thermal stripping; after the paint stripping is completed, close the valve 3 (8), open the gate valve 3 (13), ...

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Abstract

The invention relates to equipment and a method for thermal removing of paint layers of waste metals. The removing equipment comprises a feed bin (1), a feed inlet (2), a gate valve 1 (3), a valve 1 (4), an isolation bin 1 (5), a valve 2 (6), a gate valve 2 (7), a valve 3 (8), a heating furnace (9), a furnace tube (10), a mechanical pump (11), a valve 4 (12), a gate valve 3 (13), an isolation bin 2 (14), a valve 5 (15), a valve 6 (16), a gate valve 4 (17) and a base (18). The equipment has the functions of carrying out drying and pollution-free thermal paint removing on the waste metals containing the paint layers. The method for removing the paint layers on the surfaces of the waste metals, disclosed by the invention, comprises the steps of material drying and controllable oxygen partial pressure rotary continuous thermal paint removing. The equipment and the method, disclosed by the invention, have the characteristics of heating uniformity, high paint removing efficiency and no pollution and can be widely applied to waste metal recovery.

Description

technical field [0001] The invention provides equipment for removing paint layers on the surface of waste metals and a thermal paint removal method, which belong to the fields of circular economy technology and environmental protection. technical background [0002] The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention. [0003] The consumption of aluminum foil / aluminum plate, carbon steel plate / foil and automotive steel plate used in the packaging field is increasing day by day. Due to anti-corrosion requirements, the metal surface is generally covered with paint coating. After the above-mentioned metals are scrapped, the challenge for recycling and...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
Inventor 张深根潘德安孙井志刘波田建军刘阳朱行欣
Owner UNIV OF SCI & TECH BEIJING
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