Thread Content
Electro-adsorption zero-discharge full-process new technology debuts at the Environmental Expo to solve the problem of wastewater recycling and zero-discharge Author/Source: Sinochem New Network Date: 2023-04-21 Click rate: 28 On April 20, at the launch platform of the 24th China Environmental Expo held at the Shanghai New International Expo Center, Shanghai Hongji Water Technology Co., Ltd. (hereinafter referred to as Hongji Water Science), a leader in international electro-adsorption technology, released a series of new products for the entire process of electro-adsorption desalination, concentration, and salt separation suitable for sewage water reclamation and zero discharge, attracting the attention of many domestic and foreign visitors. “The desalination of high-hardness and high-salt industrial wastewater is a difficulty in the utilization of industrial wastewater resources, and it is also a bottleneck restricting the high-value resource reuse of industrial wastewater in my country. Currently, desalination technology is dominated by membrane technology. ”Dr. Sun Xiaowei, one of the founders of the International Electro-Adsorption Technology Working Organization and Chairman of Hongji Water Science, said in an interview with reporters that industrial wastewater has the characteristics of complex and changeable water quality components, large fluctuations in water volume, and strong pollution. Membrane technology has extremely strict requirements for water inlet indicators, and requires the addition of a large amount of chemicals during treatment and reuse. It is costly and can easily cause secondary pollution, which to a large extent restricts the expansion of the scale of advanced wastewater treatment and reuse. For a long time, foreign companies have occupied a monopoly in my country's reverse osmosis market. According to Sun Xiaowei, Hongji Water Science and Technology has used its long-term accumulation in the research and development and industrial application of electro-adsorption technology to develop a series of new products for desalination, reuse and zero-discharge of sewage and wastewater based on the current situation of high water costs in industrial enterprises, difficulty in recycling wastewater resources, and difficulty in implementing zero-discharge. At present, the company has completely independent intellectual property rights in the trinity of "material technology, equipment manufacturing and engineering application integration" of electrosorption, and can provide systematic, professional and integrated comprehensive solutions for water conservation and emission reduction. Chen Baihuai, general manager of Hongji Water Science and Technology, told reporters that for high-water-consuming enterprises, industrial wastewater can be desalted and reused through an electro-adsorption system, and then the concentrated brine can be separated, concentrated and reduced through electro-adsorption products, and then resourced and harmlessly treated, which can avoid costly The investment costs and operation and maintenance costs of the concentration and salt separation, evaporation and crystallization links can not only achieve the goal of water conservation and emission reduction, reduce corporate water costs, but also avoid the solid waste treatment generated at the end of the sewage and wastewater desalination and reuse project, producing significant economic and social benefits. “This set of economical, reliable, and down-to-earth solutions was not created out of thin air, but was gradually grown and matured based on independent research and development, through multiple engineering practice tests and experience accumulation. ”Sun Xiaowei said that in 2018, Hongji Water Science launched the first EX series continuous water production electro-adsorption module. After recent years of actual engineering application and the needs of enterprises for water conservation and emission reduction, the company has enriched its product categories on the original basis and developed large-throughput low-power desalination series, concentration series, salt separation series and other electro-adsorption module products. The process of small-scale test, pilot test, small-batch engineering application and large-scale engineering application shows that these products are highly reliable and have low investment and operation and maintenance costs in the desalination and reuse of industrial wastewater, especially high-salinity and high-hardness wastewater, and salt concentration and reduction. They can provide core technical support for improving enterprise water efficiency, water conservation and emission reduction, and effectively solve the water dilemma faced by enterprises. According to reports, since 2018, the company has established a series of wastewater desalination and reuse projects in petrochemical, chemical, coal mining, steel, electric power and other fields where wastewater treatment is difficult, with significant water saving and emission reduction benefits. A petrochemical company's advanced refining wastewater treatment and reuse project with a daily processing capacity of 10,000 tons was completed in 2018. The reused wastewater is 9,000 tons per day, which can reduce sewage discharge by 3 million tons and reduce the withdrawal of fresh water by 2.8 million tons per year. The comprehensive near-zero discharge sewage treatment project of an electric power company in Inner Mongolia that was upgraded in 2019 has a daily processing capacity of 15,000 tons and a daily recycled water consumption of 13,500 tons. It can reduce sewage discharge by 5 million tons and reduce the withdrawal of fresh water by 4.5 million tons per year. In 2021, the company completed the RO concentrated water, comprehensive wastewater desalination and reuse and near-zero discharge project of a biomass power plant, with a water recovery rate as high as 97%. In 2022, the company desalted, reused, concentrated and reduced the wastewater from a petrochemical group plant. The treatment scale was 10,000 cubic meters per day, reducing sewage discharge by 3 million tons per year and reducing the withdrawal of fresh water by nearly 3 million tons. The reporter noticed that after the press conference, Hongji Water Science’s booth received a large number of inquiries from visitors. “The northwestern region of my country is resource-based water shortage, and the southeastern coastal areas are water-quality-based water shortage. Water resource scarcity is more serious. Industrial water consumption accounts for 35% of the total water volume, so industrial wastewater reuse and zero discharge are of great significance. ”An exhibitor from a chemical company told reporters that they were "very interested" in the technology. It is understood that regarding wastewater reuse, * * We have also made frequent efforts in terms of policies. 2019 * * The National Development and Reform Commission and the Ministry of Water Resources jointly issued the * * "Water Saving Action Plan" proposes overall goals for my country's industrial water conservation and emission reduction and specific measures such as "vigorously promote water-saving technology and recycled water reuse and transformation, promote high-water-consuming enterprises to strengthen the advanced treatment and standard reuse of wastewater, and actively promote the cascade utilization of water cycle". June 20, 2022 * * Six ministries and commissions jointly issued the "Industrial Water Efficiency Improvement Action Plan", which made an overall plan for industrial water conservation and emission reduction, and the utilization of wastewater resources. It clearly proposed that "adhere to the water management idea of 'water conservation priority, spatial balance, systematic governance, and two-hand effort', with the goal of realizing the conservation and intensive recycling of industrial water resources, and targeting the main water-using industries and water-scarce areas." Focusing on the district, taking the creation of water-saving benchmarks and the promotion and application of advanced technologies as the starting point, using the cultivation and transformation and upgrading of the water-saving service industry as the driving force, we should optimize the industrial water structure and management methods, accelerate the formation of efficient, green, and digital water-saving production methods, comprehensively improve the efficiency and effectiveness of industrial water use, and promote high-quality economic and social development." December 13, 2022 * * The "Guiding Opinions on Further Promoting the Green Development of Industry in the Yellow River Basin" was issued and clearly stated that "by 2025, the level of industrial green development in the Yellow River Basin will be significantly improved, the industrial structure and layout will be more reasonable, the relocation and transformation of hazardous chemical production enterprises in densely populated urban areas will be fully completed, the energy consumption, water consumption, and carbon emission intensity of traditional manufacturing industries will be significantly reduced, the recycling of industrial wastewater, comprehensive utilization of solid waste, clean production levels and industrial digitalization levels will be further improved, green and low-carbon technology and equipment will be widely used, and the level of green manufacturing will be comprehensively improved."