“The power supply situation this summer is actually better than last year.†Xue Jing, an expert from China Electricity and Electric Power, told the China Securities Journal that the current coal inventory of power generation companies is at a historical high, and power generation companies are more concerned about how to go to stocks. A few days ago, the State Grid predicted a peak power shortage of 37 million kilowatts in summer. At the beginning of the year, CEC also predicted that there will be a power shortage of about 35 million kilowatts in extreme weather conditions. The news that the power gap this summer exceeded last year was widely circulated. In this regard, Xue Jing explained that the above judgment on the power gap is based on the influence of the supply of coal and the uncertainty of the water and electricity supply. From the current situation of the water supply and the supply of coal to the thermal power plant, Yingfeng The actual power gap in the summer is about 20 million kilowatts. The power gap is exaggerated. The State Grid Corporation recently held a peak summer meeting. During the period from June to September, “there is no continuous high temperature, coal supply and demand continues to be better, and the water used for hydropower is normal†In the case of a power gap of 25 million kilowatts, the power gap will reach 37 million kilowatts if there is a “large area of ​​the country, continuous extreme high temperature weather and dry waterâ€. Xue Jing pointed out that the State Grid has made the above predictions premise, that is, the water supply situation is dry and the supply of coal is problematic. However, from the current situation, these two factors do not exist. This year's power gap may be about 20 million kilowatts. The regions with gaps are mainly in North China, East China and Central China. “The power gap is not a power shortage.†Xue Jing believes that there is a power gap, which is different from the large-scale and persistent “power shortage†in the country. It is generally a structural power shortage. By adopting an orderly power supply measure, the cross-section is increased. Cross-provincial power supply support and effective coordination of coal-electricity contradictions can alleviate the contradiction between supply and demand and reduce the gap to a certain extent. The historical high level of thermal coal stocks is currently at a historically high level for domestic coal-fired power generation. Take the Central China region as an example. As of May 22, the thermal coal power plant inventory of the whole region exceeded 25 million tons, an increase of 14 million tons, and the available days exceeded 30 days. Since April, the water supply in South China, Central China and East China has been better, and hydropower has become the main force. According to the energy consumption report released by the Energy Bureau in April, the utilization hours of thermal power equipment in January-April was 1705 hours, a drop of 30 hours. The drastic changes in the electricity consumption situation have also greatly reduced the consumption of coal. In April, China's total electricity consumption increased by 3.7% year-on-year, an increase of 16 months since January 2011; the growth rate was 3.3 percentage points lower than the same period of last year, down 7.5 percentage points year-on-year. Electricity consumption in May does not seem to be ideal. In Central China, for example, the average daily electricity consumption in May decreased by 5.91%. According to Xue Jing, in order to avoid reappearing the shortage of thermal coal last year, domestic enterprises purchased a large amount of imported coal when the imported coal price was lower than that of domestic coal. Statistics show that in the first four months of this year alone, China's total coal imports reached 86.55 million tons, an increase of 69.6%. "At present, the coal stock is sufficient. If there is a power gap, it will actually benefit the thermal power enterprises." Xue Jing said that in order to make up for the power shortage, the grid company will pay higher electricity prices for power generation companies in the summer, and the current coal price level thermal power Enterprises have been able to achieve profitability. If there is a power gap, it proves that demand is strong, and it is actually good for thermal power companies.
During the production of highway painting, put glass bead into paint based on the ratio of 18-25% (weight percentage), so that the highway paint can still keep reflectivity during wear and friction. The ratio is refer to the specification of Communication Industry Standard of the People`s Republic of China No. JT/T280-2004, the standards which is different in different countries and areas.
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The appearance of glass bead should be colorless, loosen and spherical particle, should be clean without impurity, and without agglomeration |
According to the specification of Communication Industry Standard of the People`s Republic of China No.GB/T24722-2009, the granulometry is shown in the table below:
The glass bead can be produced based on the standard of countries or areas, such as EN1423/1424, AASHTO M247, BS6088, JIS R3301 and KS L2521 etc.
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