Quite specifically, during the “Twelfth Five-Year Plan†period, the “Eleventh Five-Year†emission reductions will continue: sulfur dioxide and chemical oxygen demand (COD, an indicator of how much organic matter in water) are two binding indicators. We have seen that the United States has reduced its sulfur dioxide emissions from 25 million tons per year to 8 million tons per year from the late 1980s to the early 1990s. Therefore, regardless of the “12th Five-Year Planâ€, the reduction of these two indicators in China If the row strength drops by 10% or 15%, there is enough room for reduction.
At the same time, the water-rich oxidation phenomenon of rivers and lakes in China is serious, and the pollution of Taihu Lake and Dianchi Lake is serious. The emission reduction of COD and phosphide is imperative.
But this is not enough. The "Twelfth Five-Year Plan" will also add new content: such as the reduction of nitrogen oxides emissions. With the rapid growth of China's automobile sales, the nitrogen oxides emitted from automobile exhausts have increased greatly; and denitration after desulfurization of coal combustion is also to reduce the emission of nitrogen oxides.
In addition, it will include reducing dust in the atmosphere and increasing forest coverage. The goal of increasing 40 million hectares of forest by 2020 is about 4% of China's land area. Follow the "Twelfth Five-Year Plan" and do more ideas. The forest coverage of the "Twelfth Five-Year Plan" must be increased by at least two percentage points, and 3% can be better.
In addition to conventional environmental pollutants, it will increase internationally binding targets for greenhouse gas emissions, which is closely related to the decline in energy consumption per unit of GDP. All of the above are relatively clear content, and there will be further clear goals.
Targets such as the protection of biodiversity, the prevention and control of heavy metal pollution in land, and the reforestation of land should be put on the agenda, but the specific amount may not be determined in one step.
Of course, in view of the national image of the country, the transformation of the domestic development model, and the three-way synergy of the quality of life of residents, the intensity of energy conservation and emission reduction in the “Twelfth Five-Year Plan†will not be lower than that of the “Eleventh Five-Year Planâ€.
Metallurgical Machinery Bearings
Bearings play an important role in the metallurgical industry, mainly in the following aspects:
1. Equipment operation: The metallurgical industry uses a large number of rotating equipment, such as rolling mills, ovens, cooling equipment, etc., and the normal operation of these equipment is inseparable from the support and guarantee of bearings. Bearings can reduce the friction and wear of equipment, improve the reliability and operation efficiency of equipment.
2. Load bearing: The equipment in the metallurgical industry usually needs to bear heavy loads, and the bearings can bear and distribute these loads to ensure the stable operation of the equipment. For example, in the rolling process, bearings are subjected to high temperatures, high speeds and large loads, which can ensure the normal operation of the rolling mill.
3. Temperature and environmental adaptability: The working environment of the metallurgical industry is usually harsh, such as high temperature, high humidity, corrosive gas, etc., and the bearing needs to have good high temperature resistance, corrosion resistance and other characteristics to adapt to these harsh environments.
4. Energy saving and emission reduction: The optimal design and selection of bearings can reduce energy consumption and emissions, and improve the energy utilization rate of equipment. For example, the use of low-friction bearings and high-efficiency sealing structures can reduce energy consumption and lubricant consumption.
To sum up, bearings in the metallurgical industry not only ensure the normal operation of equipment, but also improve the reliability, stability and energy efficiency of equipment, and play an important supporting role in the development of the metallurgical industry
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