Preparation method of waste tyre recycling material with modified surplus sludge

A technology for excess sludge and waste tires, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve problems such as secondary pollution, achieve strong hydrophilicity, widen application scope, and biocompatibility good effect

Active Publication Date: 2019-03-22
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, sludge disposal mainly relies on landfill, incineration and composting. With the strengthening of environmental protection awareness, the traditional methods of landfill, land use and incineration of sludge are subject to more and more restrictions. cause more serious secondary pollution

Method used

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  • Preparation method of waste tyre recycling material with modified surplus sludge
  • Preparation method of waste tyre recycling material with modified surplus sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 10g of waste rubber tires, crush and grind to form particles with a particle size of 1mm, and the tire particles are in N 2 Under the atmosphere, pyrolyze waste tires at 300°C for 2 hours to form waste tire pyrolytic carbon particles. Take 100g of residual sludge with a concentration of 10g / L and pyrolytic carbon particles for 40Hz ultrasonic mixing. The mixing time is 10h. After mixing, add 150g concentration 0.05g / L methyl cellulose, and then 50Hz ultrasonic mixing, mixing time is 1h. After that, the pyrolytic carbon with the remaining sludge adhered to the N 2 After pyrolysis at 400°C for 10 h in the atmosphere, the waste tire carbon material improved by excess sludge was finally prepared. The prepared carbon material is used for bio-filming. Taking ordinary waste tire pyrolysis carbon as a control, the bio-filming performance of waste tire carbon material improved by excess sludge is shown in the table below.

[0026] material name

Embodiment 2

[0028] Take 20g of waste rubber tires, crush and grind to form particles with a particle size of 0.5cm, and the tire particles are in N 2 Under the atmosphere, pyrolyze waste tires at 600°C for 5 hours to form pyrolytic carbon particles. Take 100g of residual sludge with a concentration of 5g / L and pyrolytic carbon particles for 70Hz ultrasonic mixing. The mixing time is 6h. After mixing, add 200g concentration 0.5g / L hydroxyethyl cellulose, and then 95Hz ultrasonic mixing, mixing time is 12h. After that, the pyrolytic carbon with the remaining sludge adhered to the N 2 Pyrolysis at 700°C for 7 hours in the atmosphere, finally prepared the waste tire carbon material modified by excess sludge. The prepared carbon material is used as an electrode material, and the ordinary waste tire pyrolysis carbon is used as a comparison. The electrochemical performance of the waste tire carbon material improved by excess sludge is shown in the following table.

[0029] material na...

Embodiment 3

[0031] Take 50g of waste rubber tires, crush and grind them to form particles with a particle size of 1cm. The tire particles are pyrolyzed at 1000°C for 10h in an Ar atmosphere to form waste tire pyrolysis carbon particles. Take 50g of excess sludge with a concentration of 0.1g / L Perform 100Hz ultrasonic mixing with pyrolytic carbon particles for 2 hours. After mixing, add 100 g of polyoxyethylene with a concentration of 1.0 g / L, and then perform 75 Hz ultrasonic mixing for 24 hours. After that, the pyrolytic carbon with the remaining sludge adhered to the N 2 After pyrolysis at 1000°C for 4 hours in the atmosphere, the waste tire carbon material modified with excess sludge was finally prepared. The prepared carbon material was used as an adsorption material, and ordinary waste tire pyrolytic carbon was used as a control, and phenol, phenanthrene, Cu 2+ As the adsorption object, the adsorption performance of waste tire carbon materials improved by excess sludge is shown in t...

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Abstract

The invention relates to a preparation method of a waste tyre recycling material with a modified surplus sludge. The method comprises the following steps: grinding a waste tyre into granules, and carrying out anaerobic high temperature pyrolysis on the waste tyre granules to form pyrolytic carbon; cleaning the pyrolytic carbon to remove the substances such as ash content and S; conducting ultrasonic mixing on the surplus sludge and the pyrolytic carbon to form a mixture; continuously carrying out ultrasonic mixing after adding a binder into the mixture; and taking out the pyrolytic carbon adhered with the surplus sludge from the mixture and carrying out anaerobic high temperature pyrolysis again to finally form the waste tyre recycling material with the modified surplus sludge. The waste tyre recycling material with the modified surplus sludge prepared by the method has the characteristics of being high in biocompatibility and hydrophilcity, can be used as a material such as a biofilmcolonization carrier, an adsorbing material and an electrode material, and has a very large application value in the industrial production.

Description

technical field [0001] The invention relates to a preparation method of a waste tire recycling material improved by surplus sludge, which belongs to the field of new materials. Background technique [0002] In recent years, the demand for various types of motor vehicles and means of transportation has increased significantly, followed by a sharp increase in the number of waste tires. Most waste tires end up in landfills, making this one of the most potentially hazardous waste disposal problems. At present, the recycling of waste tires through pyrolysis technology has become a research hotspot. Pyrolytic carbon is the main product of waste tire pyrolysis, with high carbon content, but due to the limitation of raw materials, waste tire rubber pyrolytic carbon contains a large amount of ash, inorganic impurities, etc., which reduces its surface polarity and affects its biocompatibility This limits the application of waste tire rubber pyrolysis carbon in agriculture, biology, ...

Claims

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Application Information

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IPC IPC(8): B09B3/00
CPCB09B3/00B09B3/40
Inventor 陈英文陈秀鹃范梦婕徐源徐海涛祝社民
Owner NANJING UNIV OF TECH
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