What are the 123 times of dust removal in steelmaking

The secondary and tertiary dust removal of the steelmaking plant is now for a dust removal, and the primary dust removal refers to the process of cooling and purifying the high-temperature flue gas generated in the converter blowing process through the flue, in order to achieve the purpose of energy saving and protecting the equipment, the fan of the general primary dust removal is running at low speed in the converter tapping and slag sputtering, that is, the non-blowing time, so that the dust removal can not play the role of dust removal. At the same time, in the blowing process of the converter, in order to improve the gas, the furnace mouth needs a certain positive pressure difference, that is to say, a dust removal can not suck all the smoke and dust away, considering that there will be a certain amount of smoke and dust during the blowing process, there will also be a certain amount of smoke and dust in the process of escaping steel, so there is a secondary and tertiary dust removal equipment. In fact, secondary and tertiary dust removal is relatively simple gravity dust removal and bag dust removal.

His air inlet is generally around the first flue and is connected to the dust removal equipment through the pipe. To put it bluntly, the second and third dust removal is an environmental protection measure taken to make up for the lack of primary dust removal.

Dust removal: A technical measure to remove particulate matter from dusty gases to reduce their emissions to the atmosphere.

Dust-containing industrial waste gases may be generated from mechanical processes such as crushing, screening, transportation, and blasting of solid substances, or from processes such as combustion, high-temperature melting, and chemical reactions. The former contains dust with large particle size and the same chemical composition as the original solid substance, while the latter contains small particle size and chemical properties.

Soot is different from the substance from which it is generated. Improving production processes and combustion technology can reduce the generation of particulate matter. Dust collectors are widely used to control the dust and fumes that have already been generated.

Primary dust removal refers to the process of cooling and purifying the high-temperature flue gas generated in the converter blowing process through the flue; The secondary and tertiary dust removal is the real environmental protection equipment dust removal, which uses gravity dust collector and cyclone dust collector to settle and separate the flue gas dust; The third is to use a bag filter with strong filtration capacity for high filtration purification and dust collection. The whole process is closely related to all aspects of steelmaking. Contact me with questions.

1. Wet desulfurization process.

At present, the most widely used wet desulfurization process is limestone (lime)-gypsum method, ammonia-thiamine method, seawater desulfurization method, etc., among which limestone-gypsum desulfurization process is also the most mature and widely used desulfurization technology, wet desulfurization is suitable for medium and high (SO2 concentration less than 2000 mg per cubic meter) working conditions of desulfurization needs.

2. Semi-dry desulfurization process.

The semi-dry desulfurization process occupies a small area and has no wastewater, which is suitable for medium and low sulfur (SO2 concentration is not more than 2000 mg per cubic meter).

3. Dry desulfurization process.

The dry desulfurization process mainly refers to the activated coke (carbon) adsorption method, which realizes the combined removal of NOX, dioxins and heavy metals at the same time of desulfurization. Since TISCO first introduced this technology, it has also been applied in sintering flue gas desulfurization in many iron and steel enterprises at home and abroad. There are quite a lot of dust removal equipment at the Shanghai International Solid Waste Gas Exhibition this year, so you can go to the exhibition to take a look.