[China Glass Network] Efforts: First, promote green production, vigorously improve energy and resource utilization efficiency and efficiency, and build "two-type" industries; second, actively develop green products with superior quality, energy-saving and safety functions. We will improve the green manufacturing technology guarantee centered on energy conservation and emission reduction, and actively develop green products and markets, especially in collaboration with downstream industries. The focus is on synergy with the construction industry and expanding the market for energy conservation and emission reduction products, which is an important task facing the industry.
Further promote green production
The greening of production mainly refers to cleaner production, efficient use of resources and energy. Through technological innovation, using melting furnace insulation, large furnace kiln, kiln insulation, furnace structure optimization, dust removal and desulfurization technologies, the comprehensive energy consumption and pollutant emission levels of flat glass in China are declining. From 2005 to 2010, China's flat panels The comprehensive energy consumption of glass unit products decreased by 4.9% annually. In 2010, it dropped to 16.9 kg of standard coal/weight box. Among them, float glass averaged below 16 kg of standard coal/weight box, and the carbon emissions per unit of product decreased by 4.7 per year. %, SO2 unit emissions are down by 4% annually. Since 2008, the Huaerrun Group has built a front-slab flat glass melting furnace waste heat power station. In the past three years, China has built more than 10 flat glass kiln waste heat power stations. Not long ago, China’s first all-oxygen combustion demonstration line was announced. .
1. Take comprehensive measures for energy conservation and emission reduction
More than 75% of the production of flat glass is consumed in the melting furnace. The melting furnace is the key to achieving energy saving and emission reduction. In the future, comprehensive energy saving and emission reduction measures with kiln as the core should be further implemented, and the advanced kiln structure technology should be promoted. , melting furnace waste heat power generation technology, high-efficiency flue gas dedusting and desulfurization technology, research and development and promotion of diversified high-efficiency clean fuel and advanced combustion technology equipment (including all-oxygen combustion system technology and equipment), popularizing advanced inverter motors. As far as emission reduction is concerned, in addition to being based on prevention, energy conservation measures can reduce emissions and strengthen effective governance. In the “Twelfth Five-Year Plan†period, in addition to soot and sulphide, the focus of emission control of flat glass air pollutants should also include nitride emission indicators, which will also be included in the “12th Five-Year†development plan of the building materials industry (glass industry) to be released. Make clear goals.
2. Strengthen the stable operation of the desulfurization facility
The particle size range of the flue gas of glass melting furnace is 0.1~0.5μm. Gravity dust collector, inertial precipitator and centrifugal dust collector cannot capture small particle size dust below 1μm. The company mainly uses wet dust removal, electrostatic precipitator and bag filter. Dust removal. The flue gas SO2 control mainly adopts the wet method, the dry method and the semi-dry method, and more than 80% of the enterprises adopt the wet flue gas dedusting and desulfurization. According to the different absorbents, wet desulfurization is divided into calcium method, ammonia method, magnesium method, sodium method, double alkali method and the like. According to the specific conditions of the production line, especially the fuel situation, reasonable selection of dust removal and desulfurization equipment to enable the equipment to operate stably and efficiently is a problem that enterprises should fully consider before implementing the project. Some enterprises have encountered difficulties in the operation after the installation of the facility, and they have to be demolished and rebuilt. In addition, reducing the operating cost of desulfurization equipment is also a concern. At present, there are nearly 70 production lines in China that use non-natural gas (heavy oil, coal tar, oil coke, petroleum coke, gas, etc.) as fuel to build or are building dust removal and desulfurization devices.
3. Accelerate the breakthrough of technical restrictions on nitrogen oxide emission reduction
The “Twelfth Five-Year Plan†incorporates nitrogen oxides into environmentally binding targets, and reducing nitrogen oxide emissions is a serious challenge for glass companies. It is estimated that the output of flat glass in China will reach 750 million to 820 million weight boxes in 2015, which is more than 100 million weight boxes more than 2010, and the nitrogen oxide emissions will be reduced by 10%. The task is very arduous. The nitrogen oxides in the glass melting furnace are produced by air combustion and decomposition of a small amount of nitrate in the glass raw material. Usually, the flue gas contains 2000 mg/Nm3, which is reduced to 700 mg/Nm3 according to relevant standards. At present, the first way to reduce nitrogen oxides is source control, such as the use of advanced combustion technology such as pure oxygen combustion, and the second is to carry out end treatment, using effective denitration technology.
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