Coking industry upgrade: the key is technological innovation - written at the time of the implementation of the local coking industry in our country
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There is no doubt that the key to achieving the objectives set forth in the "Regulations" is technological progress in coke production. Only by relying on technological progress can we achieve scale and intensification in order to achieve less pollution. What about the technical level of Shanxi's coke production industry?
Shanxi is a large coke producer in China, and its coke production accounts for 45% of the country's total production. The intensive production has made the coke problem in Shanxi a microcosm of China's coke problem. At present, China's coking industry mainly has three production processes, one is earth coke production, the other is machine coke production, and the third is clean production represented by SJ-96. Shanxi coke production also experienced soil coke, modified coke and small machine coke in turn. Until now, medium-sized and large-scale machine coke can be said that the overall technical level is continuously improving. However, according to environmental protection requirements, the overall level of Shanxi's coke production process technology is still very backward.
According to the “Regulationsâ€, 56% of the coke industry's total production scale in Shanxi Province should be eliminated and updated. If we compare with the developed countries in the world, our gap is even greater. The 4.3-meter coke oven that China's industrial policy supports and popularizes and uses is a type of stove that developed countries began to eliminate in the 1950s. It can be said that it has fallen behind for nearly 50 years. In 2003, the Yanzhou Mining Bureau of Shandong Province introduced a 7.3-meter coke oven from Germany. At present, the most advanced coke oven in Shanxi Province is TISCO's 2004 introduction of a 7.53-meter high coke oven with a 2×70 hole carbonization chamber. This type of furnace was the level of the 1970s. At present, the world’s most advanced furnace type is 8.43 meters with a capacity of 93 cubic meters, and China’s largest coke oven capacity is 38.5 cubic meters.
Therefore, some experts have suggested that the Shanxi coking industry must take the road of technological innovation to achieve industrial upgrading and sustainable development. Specifically speaking, it should be walked on two legs. The first is the traditional machine focusing on grouping and clean roads. The content includes the enlargement of the effective volume of the carbonization chamber and the adoption of new-type, high-efficiency pollution treatment devices. The scale of production is large and centralized to reduce Source of pollution. One of the world's technological development trends in the world's coking industry is the large furnace capacity, Shanxi should raise industrial policy standards, in the future will not be allowed to build new coke ovens under 6 meters, should actively introduce 7.63 meters and 8.43 meters large coke oven technology . Formulate corresponding policies to guide the encouragement of technological upgrading of enterprises from energy funds and sewage charges. The second is the development of clean coking processes. The world's recognized new coking technology is the "heat recovery coke oven." The countries in the world that possess this technology are the United States, Germany, and China's Shanxi Province.
SJ-96 coking technology is a coking technology developed by Shanxi Sanjia Coal Chemical Co., Ltd. after unremitting efforts for 13 years. It is a typical representative of China's energy industry to achieve innovation. According to reports, SJ-96 coke oven has four advantages in terms of technological innovation. The quality of coke is good. The use of pulverized coal smelting technology outside the furnace improves the cold strength and thermal stability of the coke. The quality of the produced coke is better than the national standard metallurgical coke standards. The main coke coal is saved, and this process technology can be allocated. 40% of weakly cohesive coal or 30% of smokeless pulverized coal saved the same amount of primary coking coal and reduced the production cost by nearly 30%; environmental pollution is small, coal dust is basically free from fugitive dust, and coke is not dusty Fly, the emission of exhaust gas is much lower than the emission of coke, which is better than the emission standard of coke oven pollutants in China; the comprehensive efficiency is good. According to the scale of 500,000 tons/year, the average ton of coke investment is 323.6 yuan, which is more than that of coke with the same scale. Nearly half of the investment. If both waste heat power generation and ferroalloy production are supported at the same time, all construction investment can be recovered in two years.
From a technical point of view, the clean coke oven process technology has basically matured and should be standardized and promoted. However, the promotion and application of new technologies often have a difficult process. Experts suggested that tamping heat recovery clean coke ovens be listed as a major new technology promotion demonstration project in Shanxi and the country and strive to obtain the support of the national industrial policy. Comprehensive evaluation of resource utilization, thermal energy balance, environmental indicators, and economic benefits of demonstration projects. On this basis, it will be gradually promoted; policy guidance should be strengthened to support environmental protection and energy-saving technologies, and high-pollution and high-energy-consumption technologies should be phased out.