Waste liquid recovery and resource utilization system

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This post was last edited by Tanran Zhi Feng on 2021-7-16 at 15:48. It is primarily used to recover components such as NH3, H2SO4, HF, HCl, NH4CL, (NH4)2SO4, NH4NO3, and NaOH from wastewater. Common basic unit operations include oil removal, heavy metal removal, pH adjustment, distillation, condensation, electrodialysis, the dual-membrane process, evaporation crystallization, or combinations of different processes. Our company carries out process design based on the specific components of the wastewater, as well as the owner’s requirements regarding the quality or concentration of the recovered products, so that the emissions from the entire system meet environmental regulations while also achieving high economic benefits from recovery. Examples of applicable industries: (1) In the hydrometallurgical processing of tantalum, niobium, etc., large amounts of hydrofluoric acid and sulfuric acid are used in production, resulting in waste acids. These waste acids are mixed acids containing various salts; they are difficult to treat and incur high costs. Recycling the hydrofluoric acid from this waste acid yields significant economic benefits. (2) Ammonia-containing wastewater generated during the hydrometallurgical processing of tungsten, vanadium, titanium, etc., due to the use of ammonia water, can be recycled through ammonia evaporation. (3) During the fiber production process, hydrochloric acid and nitric acid are used, resulting in a large amount of waste acid that must be sold at a loss. This waste acid can be separated and reused. (4) In the production process of ammonium paratungstate (APT), the crystallization mother liquor is a waste fluid containing large amounts of NH4Cl; recycling this NH4Cl not only helps to address environmental issues but also brings significant economic benefits. (5) During the production of ammonium paratungstate, a mixed waste liquid containing Na2WO4 and NaOH is generated; this alkaline liquid can be recycled, offering a high value in terms of recovery. (6) During the production of ammonium paratungstate, a composite waste liquid containing HCl and CaCl2 is generated, and the waste acid can be recycled. If you have any questions, you can add me on WeChat to discuss them. Looking forward to your joining: 13302089230