A method of using waste plastics to replace part of coal to produce coke

A technology of waste plastics and replacement parts, applied in products, coke ovens, special forms of dry distillation, etc., can solve problems such as land occupation and secondary pollution, achieve good economic and environmental benefits, and reduce environmental pollution.

Active Publication Date: 2017-05-31
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the waste plastics are disposed of by landfill or combustion, but these two methods have insurmountable problems such as occupying a large amount of land and causing serious secondary pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Slowly heat medium-temperature asphalt from Shanghai Mingtong Subgrade Material Co., Ltd. to 125°C. During the heating process, waste polypropylene granular plastics with a particle size of less than 2 mm are added. The mass ratio of waste polypropylene granular plastics to asphalt is 1:6. The tar residue accounting for 4% of the weight of the asphalt is added while stirring. After it is completely melted, it is kept for 5 minutes and then cooled to 20°C and crushed until the particle size is less than 4mm. Add the processed mixed material to the blended coal with a particle size of less than 6mm according to the weight ratio of 5% of the blended coal. The composition of the blended coal is Ad=8%, VMd=24%. After fully mixing, put it into a pulverizer for pulverization, and the particle size of the pulverized material is less than 1mm. Put the crushed material into a 40kg small coke oven and heat it up to 1050°C at a heating rate of 2.5°C / min, then stop heating and keep ...

Embodiment 2

[0029] Slowly heat medium-temperature asphalt from Shanghai Mingtong Subgrade Material Co., Ltd. to 130°C. During the heating process, waste polyvinyl chloride granular plastics with a particle size of less than 2 mm are added. The mass ratio of waste polyvinyl chloride granular plastics to asphalt is 2:5. At the same time, add tar residue accounting for 5% of the weight of the asphalt, and add it while stirring. After it is completely melted, keep it for 5 minutes, cool to 25°C, and then crush it to a particle size of less than 4mm. Add the processed mixed material to the blended coal with a particle size of less than 6mm according to the weight ratio of 7% of the blended coal. The composition of the blended coal is Ad=9%, VMd=25%. After fully mixing, put it into a pulverizer for pulverization, and the particle size of the pulverized material is less than 1mm. Put the crushed material into a 40kg small coke oven and heat it up to 1050°C at a heating rate of 2.5°C / min, then st...

Embodiment 3

[0031] Slowly heat medium-temperature asphalt from Shanghai Mingtong Subgrade Material Co., Ltd. to 130°C. During the heating process, waste polystyrene granular plastics with a particle size of less than 2 mm are added. The mass ratio of waste polystyrene granular plastics to asphalt is 2:5. At the same time, add tar residue accounting for 7% of the weight of the asphalt, and add it while stirring. After it is completely melted, keep it for 5 minutes, cool to 30°C, and then crush it to a particle size of less than 4mm. Add the processed mixed material to the blended coal with a particle size of less than 6mm according to the weight ratio of 7% of the blended coal. The composition of the blended coal is Ad=10%, VMd=26%. After fully mixing, put it into a pulverizer for pulverization, and the particle size of the pulverized material is less than 1mm. Put the crushed material into a 40kg small coke oven and heat it up to 1050°C at a heating rate of 2.5°C / min, then stop heating an...

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Abstract

The invention discloses a method for producing coke by replacing a part of coal with waste plastics, wherein the method includes the following steps: (1) heating and co-melting asphalt, the waste plastics and tar residues at the temperature of 125-135 DEG C, completely melting for 5 min, and stopping heating; (2) cooling to 20-30 DEG C, then crushing into particles with the particle size of 4 mm or less, adding mixed coal, fully mixing, adding into a crusher, crushing, and thus obtaining a mixed material with the particle size of 1 mm or less after crushing; (3) adding the mixed material into a coke oven, heating to 1050 DEG C, then stopping heating, maintaining the oven temperature for 3 h, carrying out pyrolysis into coke, and cooling the generated coke by a coke dry quenching way. Co-carbonization of the waste plastics and the coking coal provides an effective method for utilization of the waste plastics, environmental pollution of the waste plastics is reduced, at the same time, a part of replacing raw material is provided for the shortage of coking coal resources, and the good economic benefits and environment benefits are provided.

Description

technical field [0001] The invention relates to high-temperature pyrolysis of coal into coke and comprehensive utilization technology of waste plastics, in particular to a method for producing coke by using waste plastics instead of part of coal. Background technique [0002] Due to the rapid development of economic construction, the plastic industry has developed rapidly. Plastics after processing and production are increasing day by day. In 2010, the output of plastics in the world market exceeded 250 million tons. And my country has also become a veritable big country in plastic production, consumption and import. Due to the corrosion resistance, drug resistance and aging resistance of plastic itself, it exists in nature for a long time and is difficult to degrade, causing serious "white pollution". The "white pollution" produced by waste plastics is not only an environmental problem, but also a social problem. Environmental protection issues have always been the main ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/07
CPCY02P20/143
Inventor 王玉明胡德生钱晖毛晓明
Owner BAOSHAN IRON & STEEL CO LTD
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