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Method for preparing sulfuric acid from desulfurization catalyst residues
The invention discloses a method for preparing sulfuric acid from desulfurization catalyst slag, which comprises the following steps: drying the desulfurization catalyst slag, and then ball-milling and mixing with pyrite concentrate at low temperature; calcining the mixture in a fluidized bed furnace, removing dust from the generated sulfur dioxide through an electrostatic dust removal device, and catalyzing through a catalytic contact oxidation tower to obtain mixed gas of sulfur trioxide and part of uncatalyzed sulfur dioxide; and the mixed gas is introduced into a three-stage tail gas treatment system, sulfuric acid is prepared under the synergistic effect of ultrasonic cavitation treatment, the prepared sulfuric acid is filtered through a membrane filtering device, and finally iron powder is recycled. According to the method, sulfide in the waste and inactivated ferric oxide desulfurization slag can be converted into sulfuric acid, and the residual ferric oxide after treatment is high in iron content and can be used for ferrous metallurgy and cement manufacturing. The method is economical, practical and environment-friendly, and has huge development potential.
本发明公开了一种脱硫催化剂渣制硫酸的方法，包括：将脱硫催化剂渣烘干后，与硫精砂低温球磨混合；将混合物置于沸腾炉中煅烧，生成的二氧化硫通过静电除尘装置除尘，再通过催化接触氧化塔催化，得到三氧化硫和部分未被催化的二氧化硫混合气体；将混合气体通入三级尾气处理系统，在超声波空化处理的协同作用下制得硫酸，通过膜过滤装置对制成硫酸进行过滤，最后回收铁粉。本发明不仅可以将废弃失活的氧化铁脱硫渣中硫化物转化处理成硫酸，而且处理后剩余的氧化铁含铁量高，可以被用于钢铁冶金和水泥制造。本发明经济实用、绿色环保，具有巨大的发展潜力。
Method for preparing sulfuric acid from desulfurization catalyst residues
The invention discloses a method for preparing sulfuric acid from desulfurization catalyst slag, which comprises the following steps: drying the desulfurization catalyst slag, and then ball-milling and mixing with pyrite concentrate at low temperature; calcining the mixture in a fluidized bed furnace, removing dust from the generated sulfur dioxide through an electrostatic dust removal device, and catalyzing through a catalytic contact oxidation tower to obtain mixed gas of sulfur trioxide and part of uncatalyzed sulfur dioxide; and the mixed gas is introduced into a three-stage tail gas treatment system, sulfuric acid is prepared under the synergistic effect of ultrasonic cavitation treatment, the prepared sulfuric acid is filtered through a membrane filtering device, and finally iron powder is recycled. According to the method, sulfide in the waste and inactivated ferric oxide desulfurization slag can be converted into sulfuric acid, and the residual ferric oxide after treatment is high in iron content and can be used for ferrous metallurgy and cement manufacturing. The method is economical, practical and environment-friendly, and has huge development potential.
本发明公开了一种脱硫催化剂渣制硫酸的方法，包括：将脱硫催化剂渣烘干后，与硫精砂低温球磨混合；将混合物置于沸腾炉中煅烧，生成的二氧化硫通过静电除尘装置除尘，再通过催化接触氧化塔催化，得到三氧化硫和部分未被催化的二氧化硫混合气体；将混合气体通入三级尾气处理系统，在超声波空化处理的协同作用下制得硫酸，通过膜过滤装置对制成硫酸进行过滤，最后回收铁粉。本发明不仅可以将废弃失活的氧化铁脱硫渣中硫化物转化处理成硫酸，而且处理后剩余的氧化铁含铁量高，可以被用于钢铁冶金和水泥制造。本发明经济实用、绿色环保，具有巨大的发展潜力。
Method for preparing sulfuric acid from desulfurization catalyst residues
一种脱硫催化剂渣制硫酸的方法
XIE YOUCAI (author) / LIU FENG (author) / WANG SHENGYI (author) / LI MING (author) / ZHAO RUJIAN (author) / FAN SHIXIAN (author)
2023-03-31
Patent
Electronic Resource
Chinese
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