祥光铜业废水处理与烟气超低排放技术的发展历程

介绍了祥光铜业从建设初期至今废水处理与烟气超低排放技术的发展过程。通过对全厂水资源的统一调配,对生产废水循环利用和梯度利用,最终实现了生产废水的资源化和减量化。在烟气治理方面,遵循分而治之的思路,根据各工序产出的烟气性质不同,对烟气处理系统不断优化,采用布袋除尘、高温陶瓷膜除尘、湿法洗涤除尘、高浓度SO₂制酸、钠碱法脱硫、离子液脱硫、双氧水脱硫、低温氧化脱硝等除尘、脱硫、脱硝烟气处理技术进行合理组合,实现烟气超低排放的同时,提高了烟尘和硫资源的利用率。烟气经处理后,尾气中污染物的浓度稳定达到了含尘(ρ)在10 mg/m³以下,ρ(SO₂)在100 mg/m³以下,ρ(NO_x)在100 mg/m³以下。在无组织排放控制方面,祥光铜业经过长时间的排查治理和技术改造,无组织排放达到可控状态。

Development process of wastewater treatment and ultra-low emission technology of smelting flue gas in Xiangguang Copper

The development process of wastewater treatment and ultra-low emission technology of flue gas in Xiangguang copper from the initial stage of construction to now are introduced. Through the unified allocation of water resources in the whole plant, the recycling and gradient utilization of production wastewater, the recycling and reduction of production wastewater are finally realized. In the aspect of flue gas treatment, according to the different nature of flue gas produced in each process, the flue gas treatment system is continuously optimized. The flue gas treatment technologies such as bag dust removal, electric dust removal, high temperature ceramic membrane dust removal, wet scrubbing dust removal, high concentration SO2 acid production, sodium alkali desulfurization, ionic liquid desulfurization, hydrogen peroxide desulfurization, low temperature oxidation denitration are adopted. The reasonable combination of technologies can realize ultra-low emission of flue gas and improve the utilization rate of flue gas and sulphur resources. After flue gas treatment, the concentration of pollutants in the exhaust gas is stable, and the dust content(ρ) of off-gas is below 10 mg/m3, the SO2 content is below 100 mg/m3, and the NOx content is below 100 mg/m3. In terms of unorganized emission control, Xiangguang Copper has achieved a controllable state of unorganized emission after a long period of investigation and technical transformation.