Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Integrated process for flue gas purification and cementing material preparation
The invention discloses an integrated process for flue gas purification and cementing material preparation. The process comprises the following steps: (1) carrying out pre-dedusting treatment on raw flue gas to obtain pre-dedusted flue gas; enabling the pre-dedusted flue gas to be in contact with a gas containing oxychloride in a flue gas pipeline before the flue gas enters a desulfurization and denitrification tower, so as to form oxidized flue gas; contacting the oxidized flue gas with treatment slurry containing sodium hydrogen sulfite and magnesium hydroxide to obtain desulfurized and denitrified flue gas and desulfurized and denitrified slurry; wherein the gas containing the oxychloride contains chlorine dioxide, and the molar ratio of the chlorine dioxide to nitric oxide in the pre-dedusted flue gas is 1.1-1.8; and (2) crystallizing, drying and grinding the desulfurization and denitrification slurry to obtain a solid product, and uniformly mixing the solid product, light calcined magnesia, a mineral admixture and an additive to obtain the cementing material. The concentrations of nitric oxide and sulfur dioxide in the purified flue gas obtained by the method are very low, and the obtained cementing material is excellent in performance.
本发明公开了一种烟气净化及胶结材料制备的一体化工艺。该工艺包括以下步骤：(1)将原烟气经过预除尘处理，得到预除尘烟气；将预除尘烟气与含氯氧化物的气体在进入脱硫脱硝塔之前的烟气管道内接触，从而形成氧化烟气；将氧化烟气与含有亚硫酸氢钠和氢氧化镁的处理浆液接触，从而获得脱硫脱硝烟气和脱硫脱硝浆液；其中，所述含氯氧化物的气体中含有二氧化氯，二氧化氯与预除尘烟气中的一氧化氮的摩尔比为1.1～1.8；(2)将脱硫脱硝浆液经过结晶、干燥和粉磨处理得到固体产物，再将固体产物、轻烧氧化镁、矿物掺合料和外加剂混合均匀，得到所述胶结材料。本发明的方法所得净化烟气的氮氧化物和二氧化硫浓度很低，所得胶结材料性能优异。
Integrated process for flue gas purification and cementing material preparation
The invention discloses an integrated process for flue gas purification and cementing material preparation. The process comprises the following steps: (1) carrying out pre-dedusting treatment on raw flue gas to obtain pre-dedusted flue gas; enabling the pre-dedusted flue gas to be in contact with a gas containing oxychloride in a flue gas pipeline before the flue gas enters a desulfurization and denitrification tower, so as to form oxidized flue gas; contacting the oxidized flue gas with treatment slurry containing sodium hydrogen sulfite and magnesium hydroxide to obtain desulfurized and denitrified flue gas and desulfurized and denitrified slurry; wherein the gas containing the oxychloride contains chlorine dioxide, and the molar ratio of the chlorine dioxide to nitric oxide in the pre-dedusted flue gas is 1.1-1.8; and (2) crystallizing, drying and grinding the desulfurization and denitrification slurry to obtain a solid product, and uniformly mixing the solid product, light calcined magnesia, a mineral admixture and an additive to obtain the cementing material. The concentrations of nitric oxide and sulfur dioxide in the purified flue gas obtained by the method are very low, and the obtained cementing material is excellent in performance.
本发明公开了一种烟气净化及胶结材料制备的一体化工艺。该工艺包括以下步骤：(1)将原烟气经过预除尘处理，得到预除尘烟气；将预除尘烟气与含氯氧化物的气体在进入脱硫脱硝塔之前的烟气管道内接触，从而形成氧化烟气；将氧化烟气与含有亚硫酸氢钠和氢氧化镁的处理浆液接触，从而获得脱硫脱硝烟气和脱硫脱硝浆液；其中，所述含氯氧化物的气体中含有二氧化氯，二氧化氯与预除尘烟气中的一氧化氮的摩尔比为1.1～1.8；(2)将脱硫脱硝浆液经过结晶、干燥和粉磨处理得到固体产物，再将固体产物、轻烧氧化镁、矿物掺合料和外加剂混合均匀，得到所述胶结材料。本发明的方法所得净化烟气的氮氧化物和二氧化硫浓度很低，所得胶结材料性能优异。
Integrated process for flue gas purification and cementing material preparation
烟气净化及胶结材料制备的一体化工艺
TONG SHANGHUI (Autor:in)
16.07.2021
Patent
Elektronische Ressource
Chinesisch
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