Under the backdrop of the "dual carbon" goal and increasingly strict environmental policies, thermal power plants, as major water consumers, have faced the challenge of treating their desulfurization wastewater, which has become a pain point and focus in the industry. The traditional treatment methods are unable to completely address the environmental risks and disposal difficulties posed by high-salt and high-mercury wastewater. The zero-emission transformation of desulfurization wastewater has become the inevitable path for the green transformation and sustainable development of thermal power plants.
Baohupu Environmental Protection, as a leading provider of industrial water treatment and resource utilization solutions in China, has profound technical expertise and rich engineering experience in the field of zero discharge of wastewater from thermal power plants. Taking a successful renovation project of a large coal-fired power plant as an example, we demonstrate the technical strength and outstanding results of the zero discharge renovation of desulfurization wastewater.
Project Challenges:
The desulfurization wastewater from this power plant has the characteristics of complex water quality, extremely high salt content (TDS > 50,000 mg/L), high levels of chloride ions and heavy metals, and significant fluctuations. The original treatment method is costly, generates a large amount of hazardous waste sludge, and cannot achieve true "zero discharge". The environmental compliance pressure is extremely high.
Baihupu Environmental Protection Solution:
The environmental protection team of Baohupu conducted a thorough analysis of the water quality characteristics and, in combination with the actual needs of the power plant, tailored a mature, reliable and economically optimal technology route for the zero discharge transformation of desulfurization wastewater:
Deep pre-treatment enhancement: Utilizing an efficient chemical softening process combined with tubular microfiltration/ultrafiltration (TMF/UF) technology, calcium, magnesium, silicon, suspended solids, and some heavy metals are precisely removed, significantly reducing the risk of subsequent membrane scaling and contamination, laying the foundation for the stable operation of the membrane concentration system.
2. Efficient membrane cascade concentration: The core technology employs the high-pressure reverse osmosis (HPRO) + disc-tube reverse osmosis (DTRO) combined process developed by Baohupu Environmental Optimization. This enables high-scale concentration of wastewater (>90% recovery rate), significantly reduces the volume of waste, and markedly lowers the processing load and energy consumption of the evaporation crystallization unit.
3. Key Point: Evaporation and Crystallization for Salt Separation: For the concentrated high-concentration brine, the mature mechanical vapor recompression (MVR) evaporation and crystallization technology is adopted. The unique advantage of Baohupu Environmental Protection in this stage lies in integrating advanced salt separation and crystallization processes, successfully separating and purifying sodium sulfate and sodium chloride from the wastewater, obtaining crystalline salt products of sodium sulfate (Na₂SO₄) and sodium chloride (NaCl) that meet industrial standards, truly achieving the goal of "transforming waste into resources". The amount of impurities is minimized.
4. Intelligent Control and Optimization: Deploy advanced DCS control systems and online monitoring instruments to achieve full-process automation and intelligent operation, ensuring the system operates efficiently, stably, and with low consumption.
Transformation effect:
Zero emissions: The project successfully achieved 100% recycling and utilization of desulfurization wastewater, with no liquid pollutants discharged, and the utilization of crystalline salts. The impurity salt rate was less than 5%, completely solving the environmental protection problem.
Significant economic benefits: Significantly reduce the costs of hazardous waste disposal and water resource fees; The high-quality industrial salt recovered brings additional economic gains; The energy consumption of the system is significantly optimized compared to traditional solutions, resulting in lower total life cycle costs.
Environmental and social benefits: Significantly reduced the environmental pressure on water bodies and soil, enhanced the social image and green competitiveness of the power plant, and fully met the latest national environmental protection standards requirements.
Stable and reliable operation: Since the system was put into operation, it has been running stably, with strong resistance to impact loads, and easy to operate and maintain.
Bai Huipu Environmental Protection - A Reliable Partner in the Field of Zero Emission
This classic case fully demonstrates the technical leadership and engineering implementation capabilities of Baohupu Environmental Protection in the field of zero discharge transformation of desulfurization wastewater in thermal power plants. We not only provide technology, but also offer full life-cycle services including consultation and diagnosis, scheme design, core equipment supply, engineering construction, and intelligent operation.
Choosing Baihupu Environmental Protection means choosing:
Core technology for zero discharge of desulfurization wastewater that can withstand verification
An efficient, stable and low-operating-cost solution
Rich project experience and outstanding engineering delivery capabilities
The entire process of resource utilization and the concept of green sustainability
Towards a green future, achieving zero burden of wastewater!
Baohupu Environmental Protection is willing to collaborate with more thermal power enterprises, using innovative technologies and reliable engineering solutions, to jointly promote the zero-emission transformation of desulfurization wastewater in thermal power plants. We aim to contribute to the clean and low-carbon transformation of the industry and the ecological civilization construction of the country!
