碳钢酸洗液净化再生与失效酸资源化处理

        碳钢酸洗常用酸为盐酸、硫酸及磷酸等，盐酸酸洗效率高、表面质量好，硫酸成本低、适用于常温或中温工况，磷酸能在高碳钢表面生成磷酸铁盐形成一层致密的保护膜。道川环保针对酸洗废液，采用膜分离和耦合蒸发结晶工艺，实现酸液的高效净化再生，再生酸可直接回用于酸洗工序；对于失效废酸，通过资源化处理技术，提取其中的铁盐等有价成分，制成净水剂、工业级硫酸亚铁等产品，形成“酸洗-废酸再生-资源回收”的闭环模式，既降低企业酸洗成本，又解决废酸处置难题，助力工业清洁生产。

Purification and Regeneration of Pickling Solution for Carbon Steel Workpieces and Resource Utilization of Spent Acid Materials

1. Dual-Acid Solution：Hydrochloric acid (high efficiency, superior surface quality) & sulfuric acid (cost-effective, adaptable to normal/medium temperature).

2. Closed-Loop Technology：Membrane separation + evaporative crystallization for waste acid purification & regeneration, reusable directly in pickling.

3. Total Resource Utilization：Extract iron salts from spent acid to produce water purifiers, industrial ferrous sulfate, etc.

4. Dual Benefits：Cut enterprise pickling costs significantly & solve waste acid disposal challenges.

5. Eco-Friendly Orientation：Enable cleaner production and support sustainable industrial development.