Process of dust removal equipment in iron and steel enterprises Coking Because the temperature of the coking flue gas is about 90 ° C, the instantaneous temperature can reach 130 ° C, the moisture content of the flue gas is small, and the sulfur content of the flue gas is large. After many years of use, the performance of the PTFE-coated polyester needle felt filter bag meets the requirements of flue gas capture At the same time, the concentration of particulate matter in the dust collection and discharge cylinder is basically controlled between 10 mg / m3 and 20 mg / m3, which fully complies with the emission standards and special emission limits implemented on January 1, 2015. According to different aspects of the process, dust removal of stick coke requires anti-static and flame retardant. Coke platform and dry quenching dust removal require anti-static. Screening dust removal requires water-proof, oil-proof and anti-static.
2. 烧结 Process of dust removal equipment in iron and steel enterprises 2. Sintering After the electric sintering of the sintering head, the flue gas is usually equipped with dry, semi-dry and wet desulfurization systems. After the semi-dry desulfurization system, bag dust removal is required. According to the flue gas temperature (about 90 ° C) after desulfurization of the sintering head and Composition (a small amount of SO2, NOx, dust), PTFE-coated polyester needle felt is used as filter bag to remove dust, which effectively guarantees the emission concentration standard requirements. The tail of the sintering machine, flux, ingredients, and whole grain dust removal currently uses an electric dust collector to capture the flue gas. In order to meet the special emission limit requirements of 20 mg / m3, an electric bag modification scheme is being considered. However, by sintering fuel For the analysis of the emission concentration of bag-type dust removal, the PTFE-coated polyester needle felt is used as the filter bag, and the emission concentration can be maintained at about 10 mg / m3. Therefore, coated polyester filter material can be used after the modification of the electric bag.
3. 高炉炼铁 Dust removal equipment process of iron and steel enterprises 3. Blast furnace ironmaking According to the characteristics of the blast furnace flue gas, all blast furnace flue gas dust removal uses water- and oil-resistant PTFE-coated polyester needle felt as a filter bag. The particle emission concentration is basically controlled within 10 mg / m3, which can meet the special emission of new atmospheric pollutants. Limit requirements. The main components of blast furnace gas are co, CO2, N2, H2 and CH4, of which the combustible component co accounts for about 25%. At present, blast furnace gas purification uses dry dust removal. Due to continuous operation, the flue gas temperature is above 200 ° C The filter material must use high temperature resistant glass fiber or p84 (polyimide). However, after actual use, the glass fiber filter material is easily broken and has a short service life, which cannot guarantee the filtration accuracy for a long time. PTFE coating p84 (imported from Austria) After needle punching the filter material, the normal service life reaches 3 years, and the concentration of particulate matter emissions is stably controlled at about 3 mg / m3, which fully meets the production needs.
4. 电炉 Dust removal equipment process of iron and steel enterprises 4. Electric furnace
At present, electric furnace dust removal uses a three-hole collection method with four holes and a top cover. The high-temperature flue gas and normal-temperature flue gas are properly mixed to effectively reduce the flue gas temperature at the inlet of the dust collector. However, considering sudden conditions, the flue gas temperature can reach above 200 ° C. Therefore The use of PTFE-coated element tower filter materials can not only reduce operating costs, but also effectively capture smoke and filters to ensure that the concentration of particulate emissions is controlled below 10 mg / m3. Of course, in actual use on site, due to space constraints, the duct between the dust collecting hood and the body of the cleaner is also short, and high temperature flue gas will enter the cleaner in a short time. Our company has one such cleaner. Generally speaking, There is no problem in the selection of PTFE-coated elementary filter materials. In an emergency, a large number of dust bags will be burned. Therefore, we chose glass fiber filter materials in the vacuum cleaner, which effectively avoided this situation.
5. 转换器 Dust removal equipment process of iron and steel enterprise 5. Converter The secondary flue gas of the converter belongs to the normal temperature range. The PTFE-coated polyester needle felt is used as a dust bag, and the emission concentration can be maintained at about 10 mg / m3, which fully meets the new requirements for particulate matter emission concentration.
6：烟气 Process 6 of dust removal equipment for iron and steel enterprises : flue gas
The aod refining process is a reduction reaction process. If the furnace flue gas and the roof flue gas are collected separately, the temperature of the flue gas in the furnace is high and alkaline, and the water-cooled flue gas leaks. Therefore, the selected filter must have water resistance and Alkali resistance. Therefore, a ptte-coated meta filter material is selected, which can be waterproof, alkali-resistant and high-temperature resistant. The dedusting of the top cover uses a Teflon-coated polyester needle felt as a filter bag, which can meet the collection and discharge. Requirements ... If the furnace flue gas and the furnace roof flue gas are mixed and collected by the dust collector, due to the mixing effect of the normal temperature flue gas on the furnace roof, the flue gas temperature at the inlet of the dust collector can meet the requirements of normal temperature, so the PTFE-coated polyester card clothing can be used as dust removal. Cloth bag use.
7、其他环境除尘 Dust removal equipment process of iron and steel enterprises 7. Other environmental dust removal In general, under the conditions of drying and flue gas temperature below 100 ℃, PTFE-coated polyester needle felt can be used as a filter bag for environmental dust filter. Related recommendations: Several models and uses of dust collector equipment
提供的钢铁企业除尘设备工艺流程，更多钢铁企业除尘方案、报价，欢迎致电400-622-6298，宇晨为您提供更多的信息！ The above is the process of dust removal equipment provided by Yuchen dust removal equipment manufacturers . For more steel enterprise dust removal solutions and quotations, please call 400-622-6298. Yu Chen will provide you with more information!