In Guohua Taicang Power Plant Hall electronic display, real-time display of the two plant emissions data. The emission data of dust, sulfur dioxide, nitrogen oxides and so on from Unit 7, upgraded and upgraded comprehensively by energy conservation and environmental protection, is much lower than that of Unit 8, in which the emission of dust and soot is only 0.37 mg / Of the fraction, the real realization of "zero emission."
Starting from September last year, Guohua Taicang Power Plant invested 170 million yuan, on the 7th unit conducted a "zero emission" transformation. In December that year, the State Council executive meeting decided that by 2020 the full implementation of ultra-low-emission coal-fired power plants and energy-saving transformation. Ultra-low emission standards, dust does not exceed 5 mg / standard cubic meters, sulfur dioxide does not exceed 35 mg / standard cubic meters, nitrogen oxides not exceeding 50 mg / standard cubic meters.
"Our power plant's zero emission standard is far below the national ultra-low emission standards," said Wang Baozheng, senior director of environmental protection at Taicang Power Plant in Guohua. After the rebuild of Unit 7, the dust index dropped to 0.37 mg / dm3 and the sulfur dioxide To 8 mg / dm3 and nitrogen oxides as low as 16 mg / dm3, becoming the first unit in the domestic mainstream large-scale unit (600MW-class) supercritical unit to break through the emission of 1 mg / The lowest emission reduction record in Jiangsu Province record.
In addition to the "zero emission" transformation, Guohua Unit 7 comprehensive energy-saving environmental protection upgrade also includes energy-saving transformation. In this regard, Guohua Electric Power invested 200 million yuan, of which the main is the steam turbine on the 7th through the flow of transformation. After the transformation, every 1 kWh of electricity will save 17 grams of standard coal.
It is understood that last year, Guohua Taicang Power Plant completed revenue 2.16 billion yuan, net profit of 553 million yuan. A total of up to 370 million yuan a unit of the transformation of investment, accounting for two-thirds of the plant's annual profit.
According to the plan, the reconstruction of Unit 8 will also be started in August this year.
In the view of Wang Baozheng, this expensive retrofit investment is absolutely necessary. "After the reformation of Unit 7, about 252 tons of dust, about 675.6 tons of sulfur dioxide and about 377.2 tons of nitrogen oxides will be emitted annually, with less impact on the environment "
The long-term benefits from the business point of view, the comprehensive upgrade of energy-saving environmental protection is also outweigh the benefits. At present, Guohua Taicang Power Plant two generating units in the annual generating capacity of 7 billion kwh. After the transformation, Unit 7 can save more than 50,000 tons of standard coal a year. Just this one can save nearly 20 million yuan for power plants every year.
In addition, Guohua Taicang Power Plant also received the national 1-point / kWh electricity price support since the reformed emission standard passed the national ultra-low emission standard. According to the policy of saving the standard coal amount and enjoying the government electricity price, after all the two units are transformed, they can increase the revenue by more than 100 million yuan every year.
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