With the newly-built 1 million tons/year ethylene and its supporting projects fully put into operation, Sinopec Tianjin Branch’s refining capacity has tripled and its chemical production capacity has increased by 5 times this year. However, the emissions of sulfur dioxide, smoke, dust, etc., not only did not increase, but also greatly reduced. The annual emission of sulfur dioxide from the 21,000 tons before the start of construction of the project was reduced to the current 9400 tons, a drop of 54%. Tianjin Dawei has demonstrated and led the development of large-scale petrochemical high-energy and high-emission industries into the low-carbon economy development track.
“This has benefited from the huge investment in sewage, flue gas treatment, waste utilization, resource conservation, etc.†Yuan Zhongquan, Minister of Safety and Environmental Protection of Sinopec Tianjin Branch, introduced that the total investment of one million tons of ethylene and its supporting projects reached 34 billion yuan. Yuan, which invested more than 2 billion yuan in environmental protection and cleaner production.
For petrochemical companies, the greatest difficulty in reducing emissions is the treatment of flue gas. The production characteristics of Tianjin's 1 million-ton/year ethylene and auxiliary projects are to process high-sulfur crude oil, which imposes higher requirements on environmental protection equipment. In the thermal power project for the project, Sinopec Tianjin Branch newly built 3 CFB boilers, which greatly reduced the emission of pollutants. When talking about the environmental benefits realized after the boilers were put into use, Dong Hugen, secretary of the Joint No. 2 workshop of the Tianjin Petrochemical Thermoelectric Department, made a metaphor: “The three new CFB boilers are like cattle, eating grass, and squeezing out "High-sulfur heavy crude oil will generate a large amount of high-sulfur petroleum coke in the refining process. The CFB boiler uses advanced circulating fluidized bed technology, uses petroleum coke as fuel, and carries out furnace desulfurization and tail gas of petroleum coke at the same time." Desulfurization two-stage desulfurization greatly reduces the emission of atmospheric pollutants. Among them, the concentration of sulfur dioxide emitted from flue gas is reduced by 30 mg per cubic meter compared with the current boiler air pollutant emission standard in Tianjin, which is much lower than the national standard.
Fan Jinquan, director of the Refinery Department of the Eighth Workshop, introduced that Tianjin Petrochemical also invested more than 170 million yuan to support desulfurization and sulfur plant installations for large ethylene. This will not only enable hydrogen sulfide to reach zero emissions, meet the standard emission standards for flue gas, but also achieve full capacity at full load. Recovery of industrial sulfur production by 200,000 tons, sulfur recovery rate of more than 99.9%.
“This is a set of equipment that will bring new environmental standards to the environment.†Jia Shujun, director of the refinery department at Tianjin Petrochemical Company, said that the 10 million-ton oil refinery project has brought considerable pressure for environmental protection. With the implementation of large-scale projects, Tianjin Petrochemical Company has comprehensively reformed the weak links in the existing environmental protection facilities. The desulfurization equipment after the transformation basically meets the needs of oil refining production, not only further reducing the emission of hydrocarbon gases, but also desulfurizing sulfur-containing gases. The rate reached more than 95%.
Tianjin is the city with the lowest per capita water resources, and there is a serious shortage of fresh water resources. As a result, Tianjin's industrial projects have been leading the country in terms of reuse of fresh water or water, but surprisingly, Tianjin Petrochemical's annual consumption of 1 million tons of ethylene per year is zero. As the country’s first large ethylene project that only “drinks†seawater, it does not consume a drop of fresh water, saving up to nearly 40 million tons of fresh water in a year. Not only that, seawater desalination plants that supply millions of tons of ethylene are using warming and cooling seawater from the generator units of the Dagang Power Plant. This alone can save 3 million kilowatt-hours of electricity annually, reduce emissions of 2,620 tons of carbon dioxide, 8.5 tons of sulfur dioxide, and 7.4 tons of nitrogen oxides.
Tianjin Petrochemical's one-million-ton ethylene project is equipped with a huge water treatment system. These devices collect water from different sources such as sewage, polluted rainwater, and waste water, collect it, classify it, and reuse it in a circulating cooling water system. After all the sewage treatment facilities are put into use, the Tianjin Petrochemical wastewater reuse rate can reach 1,000 cubic meters per hour, the industrial water reuse rate can reach over 98%, and the water consumption per ton of oil can be reduced from the current 0.85 tons to below 0.6 tons. zero emission.
According to Yuan Zhongquan, in order to ensure safety in production, the 1 million-ton ethylene project considered the prevention and control of water pollution during the EIA, and two accident pools with capacities of 35,000 cubic meters and 15,000 cubic meters were successively constructed, which could be produced completely. In case of abnormal conditions, all wastewater will be contained to ensure no leakage of pollution.
“This has benefited from the huge investment in sewage, flue gas treatment, waste utilization, resource conservation, etc.†Yuan Zhongquan, Minister of Safety and Environmental Protection of Sinopec Tianjin Branch, introduced that the total investment of one million tons of ethylene and its supporting projects reached 34 billion yuan. Yuan, which invested more than 2 billion yuan in environmental protection and cleaner production.
For petrochemical companies, the greatest difficulty in reducing emissions is the treatment of flue gas. The production characteristics of Tianjin's 1 million-ton/year ethylene and auxiliary projects are to process high-sulfur crude oil, which imposes higher requirements on environmental protection equipment. In the thermal power project for the project, Sinopec Tianjin Branch newly built 3 CFB boilers, which greatly reduced the emission of pollutants. When talking about the environmental benefits realized after the boilers were put into use, Dong Hugen, secretary of the Joint No. 2 workshop of the Tianjin Petrochemical Thermoelectric Department, made a metaphor: “The three new CFB boilers are like cattle, eating grass, and squeezing out "High-sulfur heavy crude oil will generate a large amount of high-sulfur petroleum coke in the refining process. The CFB boiler uses advanced circulating fluidized bed technology, uses petroleum coke as fuel, and carries out furnace desulfurization and tail gas of petroleum coke at the same time." Desulfurization two-stage desulfurization greatly reduces the emission of atmospheric pollutants. Among them, the concentration of sulfur dioxide emitted from flue gas is reduced by 30 mg per cubic meter compared with the current boiler air pollutant emission standard in Tianjin, which is much lower than the national standard.
Fan Jinquan, director of the Refinery Department of the Eighth Workshop, introduced that Tianjin Petrochemical also invested more than 170 million yuan to support desulfurization and sulfur plant installations for large ethylene. This will not only enable hydrogen sulfide to reach zero emissions, meet the standard emission standards for flue gas, but also achieve full capacity at full load. Recovery of industrial sulfur production by 200,000 tons, sulfur recovery rate of more than 99.9%.
“This is a set of equipment that will bring new environmental standards to the environment.†Jia Shujun, director of the refinery department at Tianjin Petrochemical Company, said that the 10 million-ton oil refinery project has brought considerable pressure for environmental protection. With the implementation of large-scale projects, Tianjin Petrochemical Company has comprehensively reformed the weak links in the existing environmental protection facilities. The desulfurization equipment after the transformation basically meets the needs of oil refining production, not only further reducing the emission of hydrocarbon gases, but also desulfurizing sulfur-containing gases. The rate reached more than 95%.
Tianjin is the city with the lowest per capita water resources, and there is a serious shortage of fresh water resources. As a result, Tianjin's industrial projects have been leading the country in terms of reuse of fresh water or water, but surprisingly, Tianjin Petrochemical's annual consumption of 1 million tons of ethylene per year is zero. As the country’s first large ethylene project that only “drinks†seawater, it does not consume a drop of fresh water, saving up to nearly 40 million tons of fresh water in a year. Not only that, seawater desalination plants that supply millions of tons of ethylene are using warming and cooling seawater from the generator units of the Dagang Power Plant. This alone can save 3 million kilowatt-hours of electricity annually, reduce emissions of 2,620 tons of carbon dioxide, 8.5 tons of sulfur dioxide, and 7.4 tons of nitrogen oxides.
Tianjin Petrochemical's one-million-ton ethylene project is equipped with a huge water treatment system. These devices collect water from different sources such as sewage, polluted rainwater, and waste water, collect it, classify it, and reuse it in a circulating cooling water system. After all the sewage treatment facilities are put into use, the Tianjin Petrochemical wastewater reuse rate can reach 1,000 cubic meters per hour, the industrial water reuse rate can reach over 98%, and the water consumption per ton of oil can be reduced from the current 0.85 tons to below 0.6 tons. zero emission.
According to Yuan Zhongquan, in order to ensure safety in production, the 1 million-ton ethylene project considered the prevention and control of water pollution during the EIA, and two accident pools with capacities of 35,000 cubic meters and 15,000 cubic meters were successively constructed, which could be produced completely. In case of abnormal conditions, all wastewater will be contained to ensure no leakage of pollution.
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