Thermal cracking comprehensive utilization method for iron and steel industry solid waste and hazardous waste resources

A technology of thermal cracking in the iron and steel industry, which is applied in the fields of thermal cracking, solid waste and hazardous waste treatment, and the iron and steel industry. The effect of saving investment in environmental protection

Inactive Publication Date: 2020-12-11
SHANDONG 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 solid waste generated in the production process of iron and steel enterprises, such as iron-containing solid waste, carbon-containing solid waste, water slag, etc., are effectively disposed of through internal recycling or export sales, while waste cloth bags, waste plastics, waste transportation Waste oil, oily sludge, tar residue and other crackable solid waste and hazardous waste products need to be treated by a professional solid waste and hazardous waste treatment company. The main treatment method is incineration, but this treatment method has high costs and pollution. Large, low comprehensive utilization of resources and other issues

Method used

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  • Thermal cracking comprehensive utilization method for iron and steel industry solid waste and hazardous waste resources

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] After pretreatment of 100 tons of waste cloth bags, thermal cracking treatment is carried out in the continuous thermal cracking host, and the final temperature of cracking is set between 300-600°C, and the cracking reaction time is set between 0.5-2h;

[0043] The high-temperature gas generated by the pyrolysis reaction is cooled by the oil-gas separation cooler to obtain two products: combustible gas and fuel oil; the combustible gas is desulfurized by the desulfurization device and then sent to the gas cabinet, and part of the combustible gas is passed to the combustion heating device. Provide high-temperature flue gas for the pyrolysis main engine, and the surplus combustible gas is used for power generation, rotary kiln, and merged into the gas pipeline network; fuel oil is stored for export;

[0044] The solid product obtained from the thermal cracking reaction is sent to the ash slag bin through the discharge system, and is used as raw material for the solid waste t...

Embodiment 2

[0048] After pretreatment of 100 tons of oily sludge, thermal cracking treatment is carried out in the main engine of continuous thermal cracking, and the final temperature of cracking is set between 200-500°C, and the cracking reaction time is set between 0.5-2h; finally The fuel oil is about 70 tons, and its combustion value is about 40000kj / kg; the ash residue is about 2 tons, of which the C content is about 60%, and the TFe content is about 20%; the obtained combustible gas combustion value is about 14000KJ / Nm 3 , in addition to the fuel required for the combustion of the heating device in this system, it can also generate electricity of about 30,000kW·h.

[0049] Its processing method route is with embodiment 1.

Embodiment 3

[0051] After pretreatment of 100 tons of tar residue, thermal cracking treatment is carried out in the main engine of continuous thermal cracking, and the final temperature of cracking is set between 300-600°C, and the cracking reaction time is set between 0.5-2h; the final fuel About 30 tons of oil, its combustion value is about 40000kj / kg; about 35 tons of ash, of which the C content is about 75%; the combustion value of combustible gas obtained from cracking is about 7500Kj / Nm 3 , in addition to the fuel required for the combustion of the heating device in this system, it can also generate electricity of about 10000kW·h.

[0052] Its processing method route is with embodiment 1.

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Abstract

The invention relates to the technical field of iron and steel industry, solid waste and hazardous waste treatment and thermal cracking, in particular to a thermal cracking comprehensive utilization method for iron and steel industry solid waste and hazardous waste resources. Cracking raw materials obtained after pretreatment of iron and steel industry solid waste and hazardous waste resources enter a thermal cracking main machine through a feeding system and are heated to 200-600 DEG C in an air-isolated environment for a continuous thermal cracking reaction, and a high-temperature gaseous product and a solid product (ash residues) are generated; the high-temperature gaseous product generated by cracking passes through an oil-gas separation cooler to obtain a gaseous product (combustiblegas) and a liquid product (fuel oil); and flue gas discharged from an iron and steel industry solid waste treatment rotary kiln enters a rotary kiln flue gas treatment system, and the treated flue gasis discharged after reaching the standard. By adopting the method disclosed by the invention, the crackable solid waste and hazardous waste products in the iron and steel industry can be recycled andutilized in a high-valued manner, up-to-standard emission of waste gas and zero emission of waste water and waste residues are realized, and meanwhile, considerable economic benefits are obtained.

Description

technical field [0001] The invention relates to the technical fields of iron and steel industry, solid waste and hazardous waste treatment, and thermal cracking, and in particular to a method for comprehensive utilization of thermal cracking of solid and hazardous waste resources in the iron and steel industry. Background technique [0002] The iron and steel industry is the basic industry of the national economy, and it is also a high-consumption and high-emission industry. The largest emission in the entire industrial chain is solid waste and hazardous waste generated during the production process. At present, most of the solid waste generated in the production process of iron and steel enterprises, such as iron-containing solid waste, carbon-containing solid waste, water slag, etc., are effectively disposed of through internal recycling or export sales, while waste cloth bags, waste plastics, waste transportation Waste oil, oily sludge, tar residue and other crackable sol...

Claims

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Application Information

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IPC IPC(8): C10B53/00C10B57/00
CPCC10B53/00C10B57/00
Inventor 曾晖董洪壮陈万福袁宇皓王念欣张戈栾吉益
Owner SHANDONG IRON & STEEL CO LTD
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