Slag exhaust gas circulating filtration device

Abstract

The invention relates to a slag exhaust gas circulating filtration device in the field of environmental protection. The slag exhaust gas circulating filtration device comprises an auxiliary gas inletsystem, the tail end of the auxiliary gas inlet system is fittingly provided with a primary spraying device, and the auxiliary gas inlet system is connected with the same through a first pipeline. A secondary spraying device is fittingly arranged beside the primary spraying device, the primary spraying device and the second spraying device are connected through a second pipeline, a third sprayingdevice is fittingly arranged beside the second spraying device, and the secondary spraying device and the third spraying device are connected through a third pipeline. The primary spraying device, thesecond spraying device and the third spraying device are fittingly provided with sewage collection and treatment systems respectively. By filtration through the multiple spraying devices, multistageharmless treatment of blast-furnace slag exhaust gas is realized, generated wastewater is repeatedly filtered through the sewage collection systems, and cost reduction is realized.

Description

technical field [0001] The invention relates to a slag exhaust gas circulation filter device in the field of environmental protection. Background technique [0002] Blast furnace slag is a solid waste formed from gangue in ore, ash in fuel and solvent, generally non-volatile components in limestone during the blast furnace ironmaking process; it mainly contains calcium, silicon, aluminum, magnesium and iron. Oxides and a small amount of sulfides; blast furnace slag is an industrial solid waste The slag discharged during the blast furnace ironmaking process, also known as blast furnace slag, can be divided into steelmaking pig iron slag, foundry pig iron slag, ferromanganese slag, etc.; China and the Soviet Union, etc. In some areas of China, titanomagnetite is used to make iron, and vanadium-titanium blast furnace slag is discharged; depending on the grade of the ore, 0.3 to 1 ton of slag is discharged for every ton of iron smelted, and the lower the grade of the ore, the gr...

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Problems solved by technology

[0002] Blast furnace slag is a solid waste formed from gangue in ore, ash in fuel and solvent, generally non-volatile components in limestone during the blast furnace ironmaking process; it mainly contains calcium, silicon, aluminum, magnesium and iron. Oxides and a small amount of sulfides; blast furnace slag is an industrial solid waste The slag discharged during the blast furnace ironmaking process, also known as blast furnace slag, can be divided into steelmaking pig iron slag, foundry pig iron slag, ferromanganese slag, etc.; China and the Soviet Union, etc. In some areas of China, titanomagnetite is used to make iron, and vanadium-titanium blast furnace slag is discharged; depending on the grade of the ore, 0.3 to 1 ton of slag is discharged for every ton of iron smelted, and the lower the grade of the ore, the greater the amount of slag discharged; Utilize blast furnace slag; after the middle of the 20th century, the comprehensive utilization of blast furnace slag developed rapidly; the utilization rate of blast furnace slag was 85% in Japan in 1980, over 70% in the Soviet Union in 1979, and 83% in China in 1981; although slag has been widely used use, but the flue gas and ash produced should be treated in time to reduce air pollution; and the dust (including fly ash and carbon black), sulfur and nitrogen oxides contained in the flue gas are all substances that pollute the atmosphere. After purification, its emission indicators may reach several times to dozens of times the environmental protection regulations; measures to control the emission of these substances include pre-combustion treatment, improved combustion technology, dust removal, desulfurization and denitrification, etc.; Concentrations of pollutants in the regional atmosphere

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