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Treatment method and system for chlorine-containing waste plastic

A treatment method and technology for waste plastics, applied in the treatment of hydrocarbon oil, gas treatment, separation methods, etc., can solve problems such as secondary pollution

Pending Publication Date: 2020-09-15
汕头市谷源新能源有限公司
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Problems solved by technology

The currently reported treatment methods for chlorine-containing waste plastics are mainly incineration, cracking and gasification. These traditional treatment methods will generate a large amount of toxic smoke, HCl and other pollutants. The source of pollutants is mainly chlorine in chlorine-containing waste plastics. , therefore, it is very easy to produce serious secondary pollution, especially the carcinogen dioxin
At present, there is no report on the technology that can protect the chlorine in chlorine-containing plastics.

Method used

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  • Treatment method and system for chlorine-containing waste plastic
  • Treatment method and system for chlorine-containing waste plastic
  • Treatment method and system for chlorine-containing waste plastic

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Experimental program
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Embodiment 1

[0096] The composition analysis of waste plastics rich in polyvinyl chloride (PVC) is shown in Table 1:

[0097] Table 1

[0098] Moisture % Ash % Volatile % Fixed carbon % Chlorine content% raw material 30.00 8.12 58.01 3.87 1.0

[0099] The waste plastic containing PVC containing 30% water is dried in a drier at a drying temperature of 105°C, and the water content of the waste plastic is 8% after drying. The dried waste plastics are sent to the crushing device, and the particle size after crushing is less than 60mm. The crushed waste plastics are sent to the dechlorination device, heated to a temperature of 320°C for dechlorination, and the material is in a molten state. The gas exported from the dechlorination unit contains HCl and a small amount of CO 2 , CO, H 2 Wait for the gas, send the gas to the spray absorption tower, use NaHCO 3 The solution is absorbed, and NaCl salt solution is generated after absorption, CO 2 gas and water....

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Abstract

The invention provides a sectional treatment method for chlorine-containing waste plastic. The method comprises the following steps: S1, carrying out dechlorination treatment on pretreated chlorine-containing waste plastic in a dechlorination device, and obtaining a molten material and chlorine-containing gas, wherein the dechlorinating device comprises at least one dechlorinating chamber body, aflue gas chamber body surrounding the periphery of the dechlorinating chamber body and a heat preservation layer wrapping the outer wall of the flue gas chamber body; and S2, performing pyrolysis treatment on the molten material in a pyrolysis device under the vacuum condition and at the temperature of 500-700 DEG C, and generating pyrolytic carbon and pyrolytic steam. The sectional treatment method realizes comprehensive environmental protection and recycling of harmful substances of the chlorine-containing waste plastic.

Description

technical field [0001] The invention relates to the field of solid waste treatment, in particular to a treatment method and system for chlorine-containing waste plastics. Background technique [0002] Chlorine-containing plastics are an important component of plastic waste, and the amount of polyvinyl chloride (PVC) is second only to polyethylene (PE), and the amount of polyvinyl chloride accounts for about 40% of the total amount of plastics. The currently reported treatment methods for chlorine-containing waste plastics are mainly incineration, cracking and gasification. These traditional treatment methods will generate a large amount of toxic smoke, HCl and other pollutants. The source of pollutants is mainly chlorine in chlorine-containing waste plastics. Therefore, it is very easy to produce serious secondary pollution, especially the carcinogen dioxin. At present, no technology has been reported to be able to protect the chlorine in chlorine-containing plastics. Ther...

Claims

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Application Information

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IPC IPC(8): C10B53/07C10B57/08C10B57/10C10G1/10B01D53/78B01D53/68B09B3/00B09B5/00
CPCC10B53/07C10B57/10C10B57/08C10G1/10B01D53/78B01D53/68B09B3/00B09B5/00C10G2300/1003B01D2251/304B01D2257/2045B09B3/40Y02P20/143
Inventor 王雨田
Owner 汕头市谷源新能源有限公司
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