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A co-production technology for oil and gas of waste tires by catalytic cracking of waste heat of blast furnace slag

A technology for waste tires and blast furnace slag, which is applied in the field of solid waste recycling, can solve the problems of poor quality and quality of pyrolysis oil products, low energy recovery rate in the pyrolysis process, and low heating rate of tire pyrolysis, so as to improve the heat transfer efficiency. , the effect of promoting mass transfer efficiency, improving quality and quality

Active Publication Date: 2017-06-09
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The added value of oil in waste tire pyrolysis products is the highest, but the oil yield of the existing tire pyrolysis process is generally around 40% to 45%, and the economic benefits are low;
[0005] (2) Tire pyrolysis mostly uses its own pyrolysis product—gas for external heating, relying on heat conduction and heat radiation on the wall of the reactor. and poorer quality;
[0006] (3) The calorific value of gas produced in the tire pyrolysis process is relatively high, but most of it is used for tire pyrolysis heating, resulting in low energy recovery rate of the pyrolysis process

Method used

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  • A co-production technology for oil and gas of waste tires by catalytic cracking of waste heat of blast furnace slag
  • A co-production technology for oil and gas of waste tires by catalytic cracking of waste heat of blast furnace slag
  • A co-production technology for oil and gas of waste tires by catalytic cracking of waste heat of blast furnace slag

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Effect test

Embodiment 1

[0026] A technology for cogeneration of oil and gas from waste tires by using blast furnace slag waste heat catalytic cracking described in this embodiment is as follows:

[0027] (1) The liquid blast furnace slag discharged from the blast furnace is divided into multiple slag streams with a diameter of 10mm through the slag ditch, and enters the granulator for granulation. During the granulation process, the surface of the slag particles is sprayed according to the mass ratio of water to slag of 0.6:1 At the same time, NaOH powder is sprayed on the surface of the slag according to 50% of the mass of the slag, so that the surface of the slag particles forms porous and high-temperature particles loaded with NaOH, and the temperature of the slag particles is controlled at 600 ° C to discharge the granulator. Control within 3~5mm;

[0028] (2) The high-temperature slag particles loaded with NaOH enter the moving bed reactor and directly contact the crushed tire rubber powder as a...

Embodiment 2

[0032] A technology for cogeneration of oil and gas from waste tires by using blast furnace slag waste heat catalytic cracking described in this embodiment is as follows:

[0033] (1) The liquid blast furnace slag discharged from the blast furnace is divided into multiple slag streams with a diameter of 10mm through the slag ditch, and enters the granulator for granulation. During the granulation process, the surface of the slag particles is sprayed according to the mass ratio of water to slag of 0.8:1 At the same time, NaOH powder is sprayed on the surface of the slag according to 60% of the mass of the slag, so that the surface of the slag particles forms porous and high-temperature particles loaded with NaOH. Control within 2~3mm;

[0034] (2) The high-temperature slag particles loaded with NaOH enter the moving bed reactor and directly contact the crushed tire rubber powder as a heat carrier at a mass ratio of 0.8: 1. Part of the water vapor generated during the granulatio...

Embodiment 3

[0038] A technology for cogeneration of oil and gas from waste tires by using blast furnace slag waste heat catalytic cracking described in this embodiment is as follows:

[0039] (1) The liquid blast furnace slag discharged from the blast furnace is divided into multiple slag streams with a diameter of 10mm through the slag ditch, and enters the granulator for granulation. During the granulation process, the surface of the slag particles is sprayed according to the mass ratio of water to slag of 1.2:1 At the same time, NaOH powder is sprayed on the surface of the slag according to 80% of the mass of the slag, so that the surface of the slag particles forms porous and high-temperature particles loaded with NaOH. Control within 0~2mm;

[0040] (2) The high-temperature slag particles loaded with NaOH enter the moving bed reactor and directly contact the crushed tire rubber powder as a heat carrier at a mass ratio of 0.8:1. Part of the water vapor generated during the granulation...

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Abstract

The present invention provides a technology for catalytic cracking of waste tires for oil-gas co-production by using blast furnace slag waste heat. The liquid blast furnace slag is granulated into high-temperature slag particles, and after the catalyst is loaded on the surface, it directly contacts with tire rubber powder for heat exchange. Under the action of slag heat carrier and catalyst, cracking reaction occurs to realize oil and gas co-production. The technical proposal of the present invention adopts blast furnace slag waste heat as tire pyrolysis heat source to treat waste with waste, which not only realizes recycling and reduction treatment of waste tires, but also realizes efficient recovery and utilization of blast furnace slag waste heat. In addition, due to the direct contact heating method, the heat and mass transfer in the tire cracking reaction process can be significantly promoted, and the quality and quality of the high value-added product—pyrolysis oil product can be improved.

Description

technical field [0001] The invention relates to the technical field of solid waste recycling, in particular to a technology for catalytic cracking of waste tires for oil and gas cogeneration by utilizing waste heat of blast furnace slag. Background technique [0002] Waste tires are highly resistant to heat, machinery and degradation, and are difficult to digest naturally. If they are discarded in the natural environment, they will not only occupy land, waste resources, but also form a new kind of "black pollution". Therefore, realizing environmental protection and efficient utilization of waste tires has become a worldwide problem. The reclaimed rubber industry is the most important way to utilize waste tires in my country. The development of this industry has effectively made up for the serious shortage of rubber resources in my country. However, there are two fatal weaknesses in the development of reclaimed rubber industry - secondary pollution and flammable and explosiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/10C01B3/26
CPCY02P20/129
Inventor 罗思义王俊芝
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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