Observing the perspective of the birthplace of production: whether the new type of coal chemical industry can become the development direction
Sichuan Aerolite precision tools technology Co., LTD , https://www.klwoodcutter.com
It is undeniable that the new coal chemical industry is facing new development opportunities and long-term development prospects in China. At present, the technology of China's coking industry has entered the world's advanced ranks. Most of the new constructions are large-scale coke ovens with advanced technology and complete supporting facilities. Large-capacity coke ovens with a height of 6 meters in the carbonization room have been domesticated. In 2004, coke produced by mechanized coke ovens accounted for about 70% of the total output of coke; environmental protection technologies such as CDQ and ground dust removal stations have entered the practical stage; chemical product recovery capacity has been strengthened; and small-scale coke ovens that are poorly equipped and outdated have been eliminated. The progress of soil coke and modified coke ovens has accelerated.
Focusing on coal tar chemical products, focusing on deep processing and enhancing the effective use of coke oven gas have become the main targets for the comprehensive development of coking industry and the enhancement of competitiveness. For a large-scale coking enterprise with a more concentrated layout, it is necessary to make overall plans for the deep processing of tar and the utilization of surplus gas in order to achieve large-scale production and efficient and economical production.
The direct liquefaction and indirect liquefaction products of coal mainly consist of gasoline, diesel, aviation kerosene, naphtha, and olefins. The product has a huge market potential, and has a high concentration of process and engineering technologies. It is an important direction for China's new coal chemical technology and industry development. . In recent years, both technologies have been developed in research and development and demonstration of large-scale projects. Coal liquefaction has been realized in industrial production 50 years ago. The research and development of new technologies have been in foreign countries for nearly 30 years. It has accumulated a great deal of experience from basic process research to intermediate experiments. Domestic research has been for more than 20 years. Domestically, high-dispersion, direct liquefaction, and hydrogenation liquefaction catalysts have been developed in the laboratory. The catalysts have the advantages of low addition amount, good catalytic effect, low production cost, and significant increase in oil yield, and have reached the international advanced level. Based on the development of the “Shenhua Coal Direct Liquefaction New Processâ€, a process test device with a coal injection volume of 6t/d was built. From October to December 2004, solvent hydrogenation, continuous operation of hot oil, and 23-hour feeding test were conducted. The operation opened up the liquefaction process and achieved development results. The basic research and process development of a new CDCL direct liquefaction process for China's coal and coal has been initiated.
At present, some coal-producing provinces and regions in China and energy companies have combined technology acquisition and development, and have already or are currently conducting research and preliminary work on the construction of coal direct liquefaction plants.
At the same time, China's coal indirect liquefaction technology development and industrialization are accelerating. By the end of 2004, a low-temperature slurry bed synthetic oil (indirect liquefaction) pilot plant was built in China, long-period test operation was carried out, and the development of the supporting system catalyst was completed. The process software package design and engineering research of the demonstration plant was completed. Low-temperature slurry synthetic oil can obtain about 70% of diesel oil, cetane number reaches 70 or more, and other products include LPG (about 5% to 10%), oxygenated compounds, and the like. The development and operation of the indirect liquefaction pilot plant is a landmark achievement of the independent intellectual property coal-based synthetic oil technology and plays an important role in promoting the localization of technology and the development of industrialization.
Of course, the key to the development of the new coal chemical industry is the core technology issue. The development of new coal chemical technologies with independent intellectual property rights will be an important support for this proposition. At present, large-scale commercial production of indirect coal liquefaction is mature in foreign countries. Feasibility studies for the introduction of technology to build a 3 million-ton-class plant each year are in progress. However, if it is unable to have its own core technology, the development of new coal chemical industry will always be controlled by others.