Sewage treatment and reuse is the key to reflecting the advanced nature of large-scale refineries and plays a crucial role in the construction of large-scale refineries. Recently, CNPC completed and put into operation in Guangxi Petrochemical Branch the first water purification plant with micro-bubble air flotation and precision filtration integrated daily processing capacity of 50,000 tons, indicating that China's water purification process and assembly have entered The world goes first.
Guangxi Petrochemical Water Purification Plant is an auxiliary construction for the company's annual 10 million-ton refinery project. Its effluent turbidity is less than 0.3NTU, which is much better than the quality standard of China's tap water turbidity less than 3NTU. In particular, the high removal rate of humic organic molecules and silica colloids from the water purification plant's difficult to separate surface water provides industrial boilers with high-quality and safe water. The water quality, automation and energy consumption of the effluent are all achieved. The international advanced level.
According to investigations, there are currently representative mature biorefinery wastewater treatment technologies in foreign countries: A/O process, PACT+WAR (powdered activated carbon combined with bio-sludge process), and MBR process. Backwater treatment technology mainly includes membrane separation technology and chemical precipitation technology. Sewage treatment and reuse water treatment processes in refinery companies are relatively complex. PetroChina has adopted mature wastewater reuse technologies at Dagang Petrochemical, Harbin Petrochemical, and Karamay Petrochemical, with significant results. While located in Qinzhou, Guangxi, in southern China, surface water quality is affected by seasonal conditions. The impact of the changes is very large. During the rainy season, the sediment content is high. The content of organic corrosive substances and metal minerals, especially silica colloids, is high. It is difficult to guarantee the quality of water using conventional water purification processes, and it constitutes a safe water supply for the industry. Certain threats have become a new problem that has plagued China's industrial water use.
The relevant technical experts of Guangxi Petrochemical and the technicians of Dalian Petrochemical Design Institute of PetroChina conducted extensive investigation, research and demonstration, and adopted the “Flocculation + Microbubble Air Flotation + Precision Filtration†independently developed by Dasmar Environmental Technology (Beijing) Co., Ltd. Integrated new water purification process. This process fills the gap in China's surface water treatment technology.
The characteristics of the process include the fully automated precise control of the mixing and flocculation of the dosing process, which not only saves chemicals, but also ensures the best flocculation effect; the use of special pressurized dissolved gas release technology, the volume of bubbles is small , Long life, to ensure a high removal rate of suspended solids; Filtration process using multi-stage filter layer according to the reasonable size of the trapped pore size distribution and high precision of the installation process, so that the pressure difference between the filter layer control uniform, ensure floc Effective interception and separation.
The operation proved that this process can effectively remove difficult-to-isolated humus organic molecular groups and silica colloidal substances from surface water, and the effluent water quality is stable and is not affected by changes in surface water quality, ensuring the use of Guangxi Petrochemical refining production and domestic water. The requirements of the indicators meet the design requirements.
Guangxi Petrochemical Water Purification Plant is an auxiliary construction for the company's annual 10 million-ton refinery project. Its effluent turbidity is less than 0.3NTU, which is much better than the quality standard of China's tap water turbidity less than 3NTU. In particular, the high removal rate of humic organic molecules and silica colloids from the water purification plant's difficult to separate surface water provides industrial boilers with high-quality and safe water. The water quality, automation and energy consumption of the effluent are all achieved. The international advanced level.
According to investigations, there are currently representative mature biorefinery wastewater treatment technologies in foreign countries: A/O process, PACT+WAR (powdered activated carbon combined with bio-sludge process), and MBR process. Backwater treatment technology mainly includes membrane separation technology and chemical precipitation technology. Sewage treatment and reuse water treatment processes in refinery companies are relatively complex. PetroChina has adopted mature wastewater reuse technologies at Dagang Petrochemical, Harbin Petrochemical, and Karamay Petrochemical, with significant results. While located in Qinzhou, Guangxi, in southern China, surface water quality is affected by seasonal conditions. The impact of the changes is very large. During the rainy season, the sediment content is high. The content of organic corrosive substances and metal minerals, especially silica colloids, is high. It is difficult to guarantee the quality of water using conventional water purification processes, and it constitutes a safe water supply for the industry. Certain threats have become a new problem that has plagued China's industrial water use.
The relevant technical experts of Guangxi Petrochemical and the technicians of Dalian Petrochemical Design Institute of PetroChina conducted extensive investigation, research and demonstration, and adopted the “Flocculation + Microbubble Air Flotation + Precision Filtration†independently developed by Dasmar Environmental Technology (Beijing) Co., Ltd. Integrated new water purification process. This process fills the gap in China's surface water treatment technology.
The characteristics of the process include the fully automated precise control of the mixing and flocculation of the dosing process, which not only saves chemicals, but also ensures the best flocculation effect; the use of special pressurized dissolved gas release technology, the volume of bubbles is small , Long life, to ensure a high removal rate of suspended solids; Filtration process using multi-stage filter layer according to the reasonable size of the trapped pore size distribution and high precision of the installation process, so that the pressure difference between the filter layer control uniform, ensure floc Effective interception and separation.
The operation proved that this process can effectively remove difficult-to-isolated humus organic molecular groups and silica colloidal substances from surface water, and the effluent water quality is stable and is not affected by changes in surface water quality, ensuring the use of Guangxi Petrochemical refining production and domestic water. The requirements of the indicators meet the design requirements.
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