How to achieve zero discharge of desulfurization wastewater?

With the increasing development of industrial generation, especially in the field of power generation, we all know that this field relies more on coal burning. This process will produce sulfur dioxide, which is the main source of acid rain and air pollution. Therefore, in order to reduce air pollution and achieve green and eco-friendly, the source must be subject to scientific treatment. Because the large amount of wastewater generated during the desulfurization process will cause secondary pollution to the water body if it is discharged without proper treatment.

The following is a summary of how to achieve zero emissions of desulfurization wastewater and provide some help for the sustainable development of enterprises.

Where does desulfurization wastewater come from? What are the characteristics?

Desulfurization wastewater mainly comes from the wet flue gas desulfurization system. This process absorbs sulfur dioxide in the flue gas through limestone or gypsum, generating wastewater containing heavy metals, fluorides, chlorides, sulfites and other pollutants.

Desulfurization wastewater has the following characteristics:

1. High salinity: Contain large amounts of inorganic salts such as chlorides and sulfates.

2. High heavy metal content: Including toxic metal ions such as lead, cadmium, and mercury.

3. Large pH fluctuations: Affected by the desulfurization process, the wastewater may be strongly acidic or alkaline.

4. Contains suspended matter and fluoride: Pose potential threat to aquatic ecosystems.

How to achieve zero discharge of desulfurization wastewater?

In view of the complexity of desulfurization wastewater, Shangchen Environment has a complete zero-emission process solution, which has the following advantages:

● The process has strong adaptability. The pretreatment agent softening can realize automatic dosing adjustment according to the changes in wastewater quality, which can reduce errors, and boasts efficient performance and optimal balance;

● The special tubular ultrafiltration membrane effectively assists in reducing the hardness, and cooperates with the softening system to ensure the production efficiency of the membrane concentration and evaporation device;

● SPNR membrane combination system, which can double the salt concentration to 120,000-150,000 mg/L TDS, and can separate divalent and monovalent salt;

● After drying by the MVR evaporation system, NaCl with the purity higher than 97.5% can be obtained, reaching the second-level standard of refined industrial salt in GB/T5462-2003;

● After the equipment is put into operation, no sewage is discharged from the factory area, which not only meets the environmental protection requirements of zero wastewater discharge technically, but also the construction cost and economic cost are lower than other technical routes.

Zero discharge of desulfurization wastewater is not only a social call, but also a reflection of corporate social responsibility. More efficient, economical and environmentally friendly treatment solutions will continue to emerge, promoting win-win situation in global energy utilization and environmental protection. In the future, increasing investment in scientific research, promoting successful practical experience, and strengthening industry technical exchanges and cooperation, which will become an important driving force for improving the level of desulfurization wastewater treatment technology and protecting the ecological environment. Shangchen Environment will also strengthen cooperation with enterprises to provide more innovative technology output