In 2011, with the promulgation and implementation of the new sulfuric acid industrial pollutant emission standard, China's sulfuric acid industry has accelerated the pace of technological innovation, and through the introduction of foreign technology, as well as independent research and development of new technologies, the continuous promotion of low-temperature waste heat recovery The waste heat recovery work has started the fight against energy-saving and emission reduction.
In 2011, with the increase in the consumption of sulfuric acid in industries other than chemical fertilizers, light industry, textiles, iron and steel, and the recovery of phosphate fertilizers, China's sulfuric acid production has shown a substantial growth. While the production capacity continues to grow, the sulfuric acid industry is facing increasing environmental pressure. The new standard stipulates: For established sulfuric acid enterprises, the emission concentration of sulfur dioxide pollutants shall fall below 860 mg/m3 from October 1, 2011 to September 30, 2013; existing from October 1, 2013 The SO2 emission concentration of the enterprise has dropped below 400 mg/m3. The new sulfuric acid enterprise, from the date of implementation of the new standard, the sulfur dioxide emission concentration must be below 400 mg/m3. This means that after the two-year transition period, companies that do not meet the emission standards will be eliminated. A new round of industry reshuffle will be inevitable, and the task of energy saving and emission reduction is imminent.
In this context, the sulfuric acid industry will lock in the strategic focus of the “12th Five-Year Plan†in the year to advance energy-saving and emission-reduction through technological advancement. A large number of sulfuric acid companies will then carry out technological transformation and industrial upgrading.
China Sulfuric Acid Industry Association organizes relevant experts and outstanding domestic and foreign enterprises to jointly explore new technologies and methods for energy saving and emission reduction. Such as: through the introduction of advanced technology, improve the large-scale sulfur acid plant low-temperature waste heat recovery rate, and through technological innovation to solve the low-temperature heat recovery system localization problems; actively promote high-concentration sulfur dioxide conversion technology; seek ways to reduce the amount of sulfur dioxide emissions To 400 mg/m3 or less; By improving the quality of the catalyst, ensuring high conversion rate of the device and reducing sulfur dioxide emissions; Through the introduction of high-tech colleges and universities and equipment, improve tail gas treatment efficiency.
The sulphuric acid industry uses the low-temperature waste heat from the sulphur-burning acid as a topic, and for the first time carried out the same-segment competition both at home and abroad. Foreign technology has won the attention of large-scale device companies with high efficiency, safety, and high technology. Domestic technology has been favored by small and medium-sized device companies with flexibility and low cost. Among them, Nanhua Engineering's independently-innovated low-temperature waste heat recovery technology for sulfuric acid production has been applied to large-scale installations with an annual output of 800,000 tons. Among the new catalyst technologies that have been promoted at home and abroad, there are both large-scale catalyst conversion technologies introduced by companies such as Mengmoke and Topsoe, which represent the world's top level, as well as Shandong Aobao Chemical Group Co., Ltd. and Xiangfan Jingxin Catalyst. Domestic products and technologies for new products represented by limited liability companies.
In terms of efficient treatment of tail gas of sulfuric acid, Beijing University of Chemical Technology has launched the scientific research results of the treatment of tail gas by a super-gravity machine on an annual output of 200,000 tons of sulfuric acid. Zhejiang Juhua Co., Ltd. has an annual output of 200,000 tons of sulfuric acid. , to achieve better emission reduction effect. Mengmoke's sulfuric acid tail gas treatment technology for power plant large-scale equipment treatment, and Canada's Kangshifu company's new amine as an absorbent solution for the recovery of sulfur dioxide technology, provides a new way to deal with tail gas sulfur dioxide.
While continuously promoting new technologies and equipment for energy conservation and emission reduction, the sulfuric acid industry has also promoted the development of low-temperature waste heat recovery technology through the development of CDM projects. At present, there are six sets of sulphuric acid plants successfully registered in the United Nations CDM project, a group of large and medium-sized sulfur acid and smelting acid enterprises enter the design and construction period of the waste heat recovery project, and they intend to apply for the registration of CDM projects.
Through the implementation of new technologies, sulfuric acid production waste heat has been fully utilized, and large-scale sulfuric acid production continues to advance towards low carbonization. The development of corrosion-resistant materials, the further development and improvement of low-temperature residual heat recovery technologies, and the completion of demonstration projects for the construction of ore-based acid waste heat recovery projects are gradually becoming targets for energy conservation and emission reduction in the next stage of the sulfuric acid industry.
In order to accelerate the promotion of energy-saving and emission-reduction in the whole industry, the sulfuric acid industry has made technological transformation and construction of existing installations and new installations. The Sulfuric Acid Association has organized experts to explore the technological transformation methods, specific design calculation methods, and the application of processes, equipment, and materials for the plant process, and to discuss the scientific management of sulfuric acid production, recommending the best operation and management technology, and achieving energy conservation, emission reduction, and high productivity. Low consumption.
In addition, in order to continuously improve the quality of domestic catalysts, some powerful sulfuric acid enterprises have begun to adopt advanced technologies such as the Chinese Academy of Sciences and other scientific research units to modify the vanadium catalyst carrier diatomite and develop high-quality catalysts.
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