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Tire rubber cracking method capable of inhibiting generation of dioxin

A rubber and tire technology, applied in the field of tire rubber cracking, can solve problems such as strong toxicity, environmental and human hazards, and achieve the effect of avoiding and inhibiting the formation of dioxins

Inactive Publication Date: 2020-09-25
安徽克林泰尔环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the waste tires are thermally cracked through the pyrolysis furnace to realize the recycling of waste tires. However, when using the above-mentioned equipment to crack waste tires, some air will inevitably be brought in during the feeding process, so that the intermediate produced in the tire cracking process The products (such as benzene, chlorine, chlorobenzene, etc.) will react with the air brought in to form dioxins
Dioxins are chlorine-containing organic compounds containing 2 or 1 oxygen linking 2 benzene rings, which are highly toxic and extremely harmful to the environment and human body.

Method used

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  • Tire rubber cracking method capable of inhibiting generation of dioxin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The cracking method of the tire rubber that suppresses dioxin to produce, concrete steps are as follows:

[0026] (1) Put the waste tire rubber material into the preheating furnace, preheat it at 220°C for 20 minutes, and remove the gas generated during the preheating process under vacuum;

[0027] (2) The material that step (2) is obtained is transported in the cracking furnace through the screw conveyor, utilizes blower fan to blow into carbon dioxide gas in the cracking furnace, controls the oxygen content in the cracking furnace below 5%, utilizes blower fan to pulverize simultaneously The limestone particles are brought into the cracking furnace;

[0028] Among them, the mass ratio of limestone to tire rubber is 1:10, and the particle size of limestone is 100 mesh.

[0029] (3) Heating the temperature of the cracking furnace, raising the temperature to 540°C at a heating rate of 15°C / min, and heating for 40 minutes under this temperature condition range, controlli...

Embodiment 2

[0033] The cracking method of the tire rubber that suppresses dioxin to produce, concrete steps are as follows:

[0034] (1) Put the waste tire rubber material into the preheating furnace, preheat it at 220°C for 20 minutes, and remove the gas generated during the preheating process under vacuum;

[0035] (2) The material that step (2) is obtained is transported in the cracking furnace through the screw conveyor, utilizes blower fan to blow into carbon dioxide gas in the cracking furnace, controls the oxygen content in the cracking furnace below 5%, utilizes blower fan to pulverize simultaneously The limestone particles are brought into the cracking furnace;

[0036] Among them, the mass ratio of limestone to tire rubber is 1:15, and the particle size of limestone is 100 mesh.

[0037] Other conditions are identical with embodiment 1.

Embodiment 3

[0039] The cracking method of the tire rubber that suppresses dioxin to produce, concrete steps are as follows:

[0040] (1) Put the waste tire rubber material into the preheating furnace, preheat it at 220°C for 20 minutes, and remove the gas generated during the preheating process under vacuum;

[0041] (2) The material that step (2) is obtained is transported in the cracking furnace through the screw conveyor, utilizes blower fan to blow into carbon dioxide gas in the cracking furnace, controls the oxygen content in the cracking furnace below 5%, utilizes blower fan to pulverize simultaneously The limestone particles are brought into the cracking furnace;

[0042] Among them, the mass ratio of limestone to tire rubber is 1:10, and the particle size of limestone is 200 mesh.

[0043] Other conditions are identical with embodiment 1.

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Abstract

The invention discloses a tire rubber cracking method capable of inhibiting the generation of dioxin. The method comprises the following steps: carrying out a preheating treatment on tire rubber undera low-temperature condition, then carrying out an oxygen-deficient cracking treatment on the tire rubber by adopting a two-stage cracking mode under the action of limestone, and controlling the two-stage cracking temperatures to be 500-580 DEG C and 600-850 DEG C respectively. Calcium oxide generated by high-temperature decomposition of limestone reacts with gases such as hydrogen chloride generated by cracking of tire rubber to realize sulfur fixation and chlorine fixation, so that the chlorine source does not participate in reactions, thus the generation of dioxin is inhibited; meanwhile, the oxygen content is controlled, and the generation of dioxin is inhibited from two aspects: chlorine control and oxygen control.

Description

technical field [0001] The invention relates to the technical field of tire rubber cracking, in particular to a tire rubber cracking method for suppressing dioxin production. Background technique [0002] At present, the waste tires are thermally cracked through the pyrolysis furnace to realize the recycling of waste tires. However, when using the above-mentioned equipment to crack waste tires, some air will inevitably be brought in during the feeding process, so that the intermediate produced in the tire cracking process The products (such as benzene, chlorine, chlorobenzene, etc.) will react with the entrained air to form dioxins. Dioxin is a chlorine-containing organic compound containing 2 or 1 oxygen connecting 2 benzene rings, which has strong toxicity and is extremely harmful to the environment and human body. [0003] Dioxins are mainly caused by chlorine sources (such as PVC, chlorine, HCl, etc.) and incomplete combustion in substances. Oxygen, chlorine and metal e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/07C10B57/12B01D53/50B01D53/68B01D53/83
CPCB01D53/508B01D53/685B01D2251/404B01D2251/602B01D2257/2045C10B53/07C10B57/12Y02P20/143
Inventor 高玉斌
Owner 安徽克林泰尔环保科技有限公司