Low-deterioration soft coal pyrolyzing furnace

Abstract

The invention discloses a low-deterioration soft coal pyrolyzing furnace which comprises a furnace body, a coal adding device, a coal pyrolyzing and carbonizing device, a coke modifying device, a dry quenching device and a crude gas guiding device; and the coal adding device, the coal pyrolyzing and carbonizing device, the coke modifying device and the dry quenching device are integrally formed on the furnace body from top to bottom. The coal pyrolyzing furnace can be used for performing high-temperature pyrolysis on low-deterioration soft coal continuously, the combustion is realized by clean gas generated by crude gas which is subjected to the process of chemical production, recovery and purification and generated in the high-temperature pyrolysis process, the dry quenching cooling is carried out on 'smokeless carbon' which is changed by the high-temperature pyrolysis through low-temperature waste gas changed by waste gas which is incompletely burnt and subjected to heat storage and heat exchange, and high-temperature combustible waste gas generated in the process of dry quenching is burnt again with gas supply and then is used for preheating and drying the low-deterioration soft coal before the soft coal enters into the furnace, so that the coal pyrolyzing furnace does not need consuming foreign energy sources basically, and further, the production cost can be saved.

Description

technical field [0001] The invention relates to a coal pyrolysis furnace, in particular to a coal pyrolysis furnace integrating coal addition, carbonization, modification and dry quenching of low metamorphic bituminous coal. Background technique [0002] Studies have shown that the Jurassic coal reserves are the largest in my country from the perspective of formation age, accounting for about 45% of my country's proven coal reserves. Since the coal formed in this era except for a very small amount of anthracite, most of the rest are lignite , long-flame coal, non-caking coal, weakly caking coal and other low-metamorphic bituminous coals. The physical characteristics of low-metamorphic bituminous coals are high water content and high volatile components, especially lignite, which is a kind of brown-black between peat and bituminous coal. Dull low-grade coal has a moisture content of over 40% and contains free humic acid. It has strong chemical reactivity and is easily weathered...

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Problems solved by technology

[0003] However, low-modified bituminous coal and lignite are widely used in coking, oil refining, gasification, liquefaction, power and chemical industry. Dehydration and drying of low-modified bituminous coal and lignite, followed by low-temperature pyrolysis and dry distillation method, because dehydration and drying of metamorphic bituminous coal and lignite consumes a lot of energy, the production cost is high, and the coal chemical by-products obtained by low-temperature pyrolysis and dry distillation such as raw coal gas and tar It is also relatively low. At this stage, people are gradually studying the high-temperature pyrolysis process of low-metamorphic bituminous coal and lignite

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