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Paper mill waste plastic treatment method

A treatment method and technology for waste plastics, applied in the treatment of hydrocarbon oil, chemical instruments and methods, solid waste removal, etc., can solve the problems of uneven cracking heating, poor continuity of slag discharge, low heat transfer efficiency of reactors, etc., to achieve Solve the effect of low energy utilization and large scale

Pending Publication Date: 2020-09-15
汕头市谷源新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Other treatment methods for plastic waste have been disclosed in reports, such as pyrolysis methods, but the currently developed plastic pyrolysis methods have many defects, for example, the scale is difficult to scale up, the heat transfer efficiency of the reactor is low, and the continuity of slag discharge is poor. , uneven pyrolysis heating leads to coking during the pyrolysis process, and the quality of the oil produced at the same time is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] The analysis results of waste plastics rich in polyethylene (PE) in a paper mill are shown in Table 1:

[0089] Table 1

[0090] Moisture % Ash% Volatile % Fixed carbon % raw material 70.00 3.70 25.30 1.00 After filter press 35.00 8.10 54.82 2.08 after drying 6.00 11.59 79.28 3.13

[0091] After being extruded by a filter press, the moisture content of the waste plastics is 35%. The waste plastics after filtration are sent to the chain plate dryer for flue gas drying. The drying temperature is 90°C, and the moisture content of the waste plastics after drying is 6%. The dried waste plastics are sent to the crushing device, and the particle size after crushing is less than 50mm. The crushed waste plastics are sent to the pyrolysis device, where pyrolysis reaction occurs, the final temperature of pyrolysis is controlled at 550°C, and the pyrolysis steam enters the spray tower for spray cooling, and the temperature of the sp...

Embodiment 2

[0098] The analysis results of waste plastics rich in polypropylene (PP) in a paper mill are shown in Table 3:

[0099] table 3

[0100] Moisture % Ash% Volatile % Fixed carbon % raw material 80.00 2.2 15.30 2.5 After filter press 40.00 8.10 54.82 2.08 after drying 10.00 11.59 79.28 3.13

[0101] After being extruded by a filter press, the moisture content of the waste plastics is 40%. The waste plastics after filtration are sent to the chain plate dryer for flue gas drying. The drying temperature is 100°C, and the moisture content of the waste plastics after drying is 10%. The dried waste plastics are sent to the crushing device, and the particle size after crushing is less than 50mm. The crushed waste plastics are sent to the pyrolysis device, where pyrolysis reaction occurs, the final temperature of pyrolysis is controlled at 700°C, and the pyrolysis steam enters the spray tower for spray cooling, and the temperature of the ...

Embodiment 3

[0108] The analysis results of waste plastics rich in polyvinyl chloride (PVC) in a paper mill are shown in Table 5:

[0109] table 5

[0110] Moisture % Ash% Volatile % Fixed carbon % raw material 70.00 2.6 26.3 1.1 After filter press 30.00 6.07 61.37 2.57 after drying 5.00 8.23 83.28 3.48

[0111] After being extruded by a filter press, the waste plastic has a moisture content of 30%. The waste plastic after filtration is sent to the chain plate dryer for flue gas drying. The drying temperature is 100°C, and the waste plastic moisture after drying is 5%. The dried waste plastics are sent to the crushing device, and the particle size after crushing is less than 50mm. The crushed waste plastics are sent to the pyrolysis device, where pyrolysis reaction occurs, the final temperature of pyrolysis is controlled at 500°C, and the pyrolysis steam enters the spray tower for spray cooling, and the temperature of the spray tower is 70°...

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Abstract

The invention provides a paper mill waste plastic treatment method which comprises the following steps: (1) dehydrating papermaking waste plastic to enable the water content of the material to be lower than 40 wt%; (2) drying the dehydrated material, wherein the water content of the dried material is lower than 10 wt%; (3) crushing the dried material to enable the particle size of the material tobe less than 50mm; (4) sending the crushed materials into a pyrolysis reactor for pyrolysis and cracking, and generating pyrolysis steam and pyrolysis carbon, wherein the temperature in the pyrolysisreactor is controlled to be 500-700 DEG C; and (5) performing spray cooling on the pyrolysis steam, obtaining a pyrolysis gas and oil-water mixture, and then feeding the oil-water mixture into an oil-water separator to be separated, wherein the spray cooling temperature ranges from 70 DEG C to 80 DEG C. The paper mill waste plastic treatment method can truly realize harmless and resourceful treatment of the waste plastics, and is an ultimate treatment means of organic wastes.

Description

technical field [0001] The invention relates to the field of solid waste treatment, in particular to a treatment method and system for paper mill waste plastics. Background technique [0002] In recent years, with the industrial development of plastic products, composite paper packaging materials have been widely used, the most common being paper / plastic composite materials. At present, the most important way to recycle such materials is to recycle paper. As a result, the amount of waste plastic produced in the recycling process is also increasing year by year. Because waste plastics are light and bulky, they are not easy to decompose after being discarded, causing soil compaction, hindering crops from breathing and absorbing nutrients, and emitting CO, vinyl chloride monomer, HCl, methane, NOx, SO under the action of ultraviolet rays or when burned 2 , Aromatic hydrocarbons, etc. pollute water bodies and air, and chlorine-containing plastics incinerate harmful substances ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/07C10B57/10C10B57/00C10B47/00C10G1/10B09B3/00B09B5/00
CPCC10B53/07C10B57/10C10B57/00C10B47/00C10G1/10B09B3/00B09B5/00C10G2300/1003B09B3/40Y02P20/143
Inventor 王雨田
Owner 汕头市谷源新能源有限公司
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