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Waste filter bag cleaning and recycling device and method

A technology of recycling equipment and recycling methods, which is applied in the direction of plastic recycling and recycling technology, can solve the problems that affect the recycling of polytetrafluoroethylene filter bags, and the surface stains cannot be cleaned thoroughly, so as to prolong the storage time and reduce the price. Effect

Inactive Publication Date: 2020-01-17
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem in the prior art that the stains on the surface of waste polytetrafluoroethylene filter bags cannot be thoroughly cleaned, which affects the recycling of polytetrafluoroethylene filter bags, the present invention provides a cleaning and recycling equipment and method for waste polytetrafluoroethylene filter bags; Use surfactants to clean the stains on the surface of the filter bag, and at the same time pickle the cleaned filter bag to remove the metal oxides on the surface of the filter bag, which can better remove the stains on the surface of the filter bag and obtain a relatively pure polymer. Tetrafluoroethylene particles

Method used

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  • Waste filter bag cleaning and recycling device and method
  • Waste filter bag cleaning and recycling device and method
  • Waste filter bag cleaning and recycling device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0045] to combine figure 1 , a cleaning and recovery equipment for waste filter bags in this implementation, including a conveyor belt 5 and a drum 6, the drum 6 drives the conveyor belt 5 to move; Cargo area 7, cleaning area 1, spraying area 2, drying area 3 and unloading area 4. Wherein, the cleaning area 1 has a length of 2m and a width of 1.2m. The spray area 2 has a length of 2m and a width of 1m. The conveying speed of the conveyor belt 5 can be 0.8-1.2m / min, which is set to 0.8m / min in this embodiment.

[0046] to combine figure 2 The inside of the cleaning area 1 and the spraying area 2 is provided with a cleaning assembly, the cleaning assembly includes a water supply main pipe 8 and a water supply branch pipe 9, the water supply branch pipe 9 is connected with the water supply main pipe 8, and the water supply branch pipe 9 is along the water supply main pipe 8 There are many roots arranged side by side in the length direction. Specifically in this embodiment, ...

Embodiment 2

[0050] The cleaning and recovery equipment of a waste polytetrafluoroethylene microporous membrane filter bag in this implementation is basically the same in design as that of Example 1, the difference is that the transmission speed of the conveyor belt 5 is set to 1.2m / min in this example. Set the nozzle 10 of the cleaning area 1 at a distance of 500 mm from the filter bag, and the pressure of the nozzle 10 is 0.5 MPa. The nozzle 10 of the spraying area 2 is 500mm away from the filter bag, and the pressure of the nozzle 10 is 3MPa. The distance between the tuyere 11 of the drying zone 3 and the filter bag is 500mm, and the wind speed of the tuyere 11 is 10m / s.

Embodiment 3

[0052] The cleaning and recovery equipment of a waste polytetrafluoroethylene microporous membrane filter bag in this implementation is basically the same in design as in Example 1, the difference is that in this example, the conveying speed of the conveyor belt 5 is set to 1.0 m / min. Set the nozzle 10 of the cleaning area 1 at a distance of 400 mm from the filter bag, and the pressure of the nozzle 10 is 0.4 MPa. The nozzle 10 of the spraying area 2 is 400 mm away from the filter bag, and the pressure of the nozzle 10 is 2 MPa. The distance between the tuyere 11 of the drying zone 3 and the filter bag is 400mm, and the wind speed of the tuyere 11 is 7m / s.

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Abstract

The invention discloses a waste filter bag cleaning and recycling device and method, and belongs to the technical field of material recovery. According to the method, a waste polytetrafluoroethylene microporous membrane filter bag is subjected to processes of pre-cleaning, surface active agent cleaning, acid pickling, classification, heating quenching and mechanical crushing, the waste filter bagis cleaned, the problem of incomplete cleaning of the waste filter bags in the prior art is solved, when a surface active agent is used for cleaning, the the cleaning device conveys the waste filter bags through a conveying belt to sequentially pass through a feeding area, a cleaning area, a spraying area, a drying area and a discharging area, the device uses high pressure to remove dust and organic stains on the surfaces of the waste filter bags through the arranged water supply dry pipes, water supply branch pipes and nozzles in the cleaning area and the spraying area, and the waste filter bags are dried in the drying area through hot air and repeatedly cleaned for several times, so that dust and organic matters on the surfaces of the filter bags can be completely removed. According to the device and the method, the waste filter bags are thorough in cleaning, so that the polytetrafluoroethylene particles are high in recovery purity.

Description

technical field [0001] The invention relates to the technical field of material recycling, and more specifically, to a cleaning and recycling device and method for waste filter bags. Background technique [0002] Smoke and dust emissions from waste incineration plants, coal-fired power plants, and iron and steel production are major sources of air pollution. The bag filter has the characteristics of high dust removal efficiency, wide range of processing air volume, insensitivity to dust characteristics, and can operate in high temperature environments. It has a wide range of fields such as boiler dust removal in coal-fired power plants, dust removal in mining industries, and waste incineration tail gas purification. application. [0003] At present, the raw materials of the filter bag in the bag filter mainly include polyphenylene sulfide (PPS), polytetrafluoroethylene (PTFE), polyimide (PI) and glass fiber. Among them, polytetrafluoroethylene (PTFE), commonly known as the...

Claims

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Application Information

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IPC IPC(8): B29B17/00B29B17/04B29K27/18
CPCB29B17/00B29B17/0412B29B2017/0015B29K2027/18Y02W30/62
Inventor 钱付平魏民董伟陈路敏叶蒙蒙鲁进利韩云龙
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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