Among China's coal resources, lignite and low-grade bituminous coal account for about 54%. The National "Eleventh Five-Year Plan for Energy Development" encourages enterprises to make full use of such resources as low-quality coal, by-products from coal washing and processing, coal mine gas, and mine water. Compared with other coals, lignite has a high internal water content of 30%, a calorific value of only about 14 MJ/kg, a low density, a large change in ash content and ash melting point, and is a poor quality coal that is difficult to use. How to comprehensively develop and utilize energy-saving and environment-friendly lignite resources with huge reserves, and seek scientific and reasonable lignite deep processing technology is an important issue that needs to be solved urgently in the field of coal chemical engineering.
"SES gasification system lignite industrial gasification technology" is based on the original SES fluidized bed gasification furnace innovation, based on trial burn 3400 tons of Inner Mongolia lignite, continuous operation for 14 days, the indicators are stable: daily processing coal 150 -200 tons; Gas production 7000-10000Nm3/hr net syngas; Carbon conversion rate 95.8%; Cold gas efficiency 81.5%; Specific oxygen consumption 300Nm3/Km3(CO+H2+CH4); Specific coal consumption 1052Kg/Km3(CO+H2 +CH4); effective synthesis gas composition (CO+H2+CH4) 68.2%; residual carbon residue 0.65%; fly ash residual carbon 13.0%. Using fieldbus to control the FCS technology, the equipment chaining rate is 100%, and the equipment automation level is high; the fly ash is recovered with the pressure bag type dust collector structure, the investment is saved, and the effect is good; the ash removal at the bottom of the gasifier adopts double ash cooler technology To ensure continuous and stable operation of slag discharge operation; dry slag discharge, tar and phenol are not included in the product gas, and the amount of sewage is small. After conventional biochemical sewage treatment, the discharge can be achieved and meet the environmental protection requirements; pulverized coal raw materials less than 6mm can be used. , Coal variety of adaptability.
Assessed by the appraisal committee, the technical innovation point is obvious, and it has reached the international advanced level of fluidized bed coal gasification technology and has great promotion value. The successful development of the project is of great significance to the full use of lignite resources, increase the added value of coal, and promote the development of coal chemical industry in the whole province and even the whole country.
Recently, entrusted by the Science and Technology Department of Shandong Province, Zaozhuang Municipal Science and Technology Bureau presided over the “SES Gasification System Lignite Industry Gasification†jointly researched by Axins (Zaozhuang) New Gas Co., Ltd. and Shandong Lunan Coal Chemical Engineering Technology Research Institute. Technical "technical appraisal meeting. Eight well-known experts from the domestic coal chemical industry conducted a technical appraisal of the project.