降低铜精矿干燥窑尾气含尘生产实践
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摘要
大冶有色冶炼厂收尘系统已运行接近二十年,外排烟气含尘浓度偶尔无法达标,在不进行大规模的投资和改造下,对现有的备料电收尘系统进行了改造。改造措施包括:对干燥窑燃烧室拱顶使用耐火材料一次性浇筑,加强燃烧室的密封性能;对电收尘系统进行改造升级,并加强日常检查及维护;对动力波系统进行改造,并加强清理作业;在动力波洗涤液中添加起泡物质,增加动力波泡沫产生量。改造后,收尘效率大幅提升,尾气含尘浓度已下降至61 mg/Nm~3,满足环保外排烟气含尘浓度≤80 mg/Nm~3标准要求。此次改造成功对其他老旧电收尘系统的改造有一定的借鉴意义。
The dust collection system of Daye Nonferrous Smelter has been running for nearly 20 years, and the dust concentration of the exhaust smoke was occasionally unable to reach the standard. The existing electric dust collection system has been modified without large-scale investment and transformation. The transformation measures included the following aspects, using refractory material for one-time pouring on the vault of the drying kiln combustion chamber to enhance the sealing performance of the combustion chamber, transforming the power wave system and strengthening the cleaning operation, adding foaming substances to the power wave washing liquid to increase the amount of power wave foam generation. After the transformation, the dust collection efficiency has been greatly improved, and the dust concentration of the exhaust gas has dropped to 61 mg/Nm~3, which meets the requirements of the dust emission concentration ≤80 mg/Nm~3. The successful transformation has certain reference significance for other old electric dust collection systems.
The dust collection system of Daye Nonferrous Smelter has been running for nearly 20 years, and the dust concentration of the exhaust smoke was occasionally unable to reach the standard. The existing electric dust collection system has been modified without large-scale investment and transformation. The transformation measures included the following aspects, using refractory material for one-time pouring on the vault of the drying kiln combustion chamber to enhance the sealing performance of the combustion chamber, transforming the power wave system and strengthening the cleaning operation, adding foaming substances to the power wave washing liquid to increase the amount of power wave foam generation. After the transformation, the dust collection efficiency has been greatly improved, and the dust concentration of the exhaust gas has dropped to 61 mg/Nm~3, which meets the requirements of the dust emission concentration ≤80 mg/Nm~3. The successful transformation has certain reference significance for other old electric dust collection systems.
引文
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