Desulfurization wastewater refers to the industrial wastewater generated in the wet desulfurization process of flue gas in coal-fired power plants. Due to the large amount of sulfur dioxide and other impurities in the flue gas, these substances will dissolve into the water to form desulfurization wastewater during the wet desulfurization process. This wastewater contains a high concentration of suspended solids, as well as heavy metal ions such as lead, mercury, cadmium, chromium, fluoride, sulfate and some soluble salts and other pollutants, if directly discharged, it will cause serious pollution to the environment.
The main methods for treating desulfurization wastewater include chemical precipitation, physicochemical method, evaporation concentration and other technologies. Due to the large pollution and harm of desulfurization wastewater, it is necessary to remove the harmful substances in the wastewater through reasonable treatment methods, so that it can be discharged or reused only after it meets the specified wastewater discharge standards, so as to achieve the dual benefits of environmental protection and resources.
Near-zero discharge of desulfurization wastewater is a well-established method. At present, the technology for desalination and separation in the zero-discharge treatment of desulfurization wastewater is the Neterfo limit separation system. The Neterfo Extreme Separation System uses membrane elements with strong anti-pollution performance, which has the characteristics of high salt resistance, high hardness resistance, high COD resistance, etc., and can filter suspended solids, solid impurities, acid ions, salts, etc. contained in desulfurization wastewater without the help of chemical reactions.
Compared with the biochemical treatment method, the membrane filtration precision is high, and the effluent quality after treatment is stable, which can effectively reduce the salt content in the effluent, so that it can be reused as a circulating water supplement. In addition, the Neterfo limit separation system relies on a variety of technical means such as large cross-flow PON pollution resistance technology and POM wide flow channel viaduct technology, which reduces the risk of pollution blockage while ensuring the best rate of the system, and reduces the burden for later maintenance. Therefore, the system has obvious advantages in the zero-discharge treatment of desulfurization wastewater.
The treatment of desulfurization wastewater should be based on the safety of the treatment process and the reliability of the treatment results, and based on the needs of environmental protection and sustainable development. Zero discharge treatment of desulfurization wastewater is a systematic and comprehensive process, and its treatment technology still has room for improvement.
Note: Zero Discharge is a near-zero emission treatment technology.
Editor: Novelty Technique: Muzi.
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