Foreword: As the main mode of electricity in China, coal-fired power generation has attracted increasing attention to environmental protection and sustainable development in the context of energy structure transformation. Among them, the wastewater generated in the process of coal-fired power generation contains a large number of pollutants, such as sulfides and heavy metals, which not only pollute the environment, but also threaten human health. Therefore, it is necessary to treat and reduce the wastewater in the process of coal-fired power generation.
In the wastewater from coal-fired power generation, desulfurization wastewater is one of the main sources of pollution. The main pollutants in desulfurization wastewater include suspended solids, organic matter, sulfides, heavy metals, etc., which are very harmful to the environment and human health. Therefore, the treatment and emission reduction of desulfurization wastewater is one of the important tasks of coal-fired power generation enterprises.
Desulphurization wastewater from coal-fired power generation**:
At present, coal-fired power generation enterprises generally use wet desulfurization technology for desulfurization. However, wet desulfurization technology produces large amounts of wastewater that contain large amounts of pollutants that need to be treated before they can be discharged. The traditional desulfurization wastewater treatment method mainly adopts a combination of chemical treatment and physical treatment, although most of the pollutants can be removed, but it is difficult to achieve zero discharge of wastewater. Therefore, in order to achieve sustainable coal-fired power generation, better wastewater treatment technologies are needed.
The near-zero discharge process is a new type of wastewater treatment technology, which can achieve near-zero discharge of wastewater. In the field of coal-fired power generation, near-zero discharge processes have been widely used in desulfurization wastewater treatment. At present, the common near-zero discharge process used in the treatment of desulfurization wastewater in coal-fired power generation is "Wastout microwave high-efficiency sedimentation system + Neterfo limit separation system + MVR evaporation system", which has the advantages of long-term stable operation, and also has the characteristics of high salt resistance, high hardness resistance and high COD resistance. In the process of application of this process, we also found that while achieving the near-zero discharge treatment effect of desulfurization wastewater, it can also be used with other processes to reuse the wastewater, and the effect is also very impressive.
In addition, the Neterfo limit separation system applied in the process mainly adopts cross-flow PON anti-pollution technology and POM wide flow channel viaduct technology, which not only improves the anti-pollution performance of the system, but also reduces the risk of fouling and blockage while ensuring the best rate of the system, reduces the maintenance burden, and has obvious advantages in the process of near-zero discharge of desulfurization wastewater.
With the improvement of environmental protection requirements and the continuous development of technology, the application prospect of near-zero emission process in the field of coal-fired power generation is very broad. In the future, near-zero emission processes will be more mature and efficient, and can better meet the environmental requirements and sustainable development needs of coal-fired power generation enterprises. At the same time, with the continuous development of new membrane materials and new separation technologies, the zero-emission process will also become more diverse and efficient.
In addition, with the development of industrial Internet technology, more intelligent and automated technologies will be applied in near-zero emission processes. Through the application of intelligent and automation technologies, the efficiency and precision of near-zero emission processes can be further improved, so as to better meet the environmental protection requirements and sustainable development needs of coal-fired power generation enterprises.
Editor: Qiqi Technology: Muzi.
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