Low grade oil shale processing technique

Abstract

The invention provides a low grade oil shale processing technique. Shale of a retort furnace is preheated in a dry distillation section on the upper part of the furnace to raise temperature, and the water content and wetted gas on the surface of the shale are removed; the temperature of the shale is increasingly raised in a process of moving the dry distillation section down, and when the temperature is raised to 120 DEG C, the water content on the surface is evaporated completely; when the temperature is raised to between 150 and 180 DEG C, gases adsorbed in the shale are released; when the temperature exceeds 180 DEG C, organic matters in the shale are started to be decomposed to generate water content, gases such as carbon dioxide, sulfureted hydrogen and the like; and when the temperature of the shale is continuously raised to 520 DEG C, tar oil in the shale is fundamentally released; temperatures of various parts of the retort furnace are controlled, and the final temperature of the retort furnace is mainly controlled to 520 DEG C; and a thermometer is arranged under an arch abutment of a mixing chamber, and is inserted in the depth of between 1.0 and 1.5 meters. The low gradeoil shale processing technique has the advantages that: the oil rate of the 5 percent low grade oil shale is over 75 percent, and more shale oil can be extracted from low grade shale ore through themeasure.

Description

technical field [0001] The invention relates to the field of petrochemical technology, and in particular provides a low-grade oil shale processing technology. Background technique [0002] With the rapid development of my country's national economy and the rapid growth of oil consumption, my country's dependence on foreign oil resources has gradually increased. In order to reduce dependence on oil imports, people have adopted corresponding security strategies, such as optimizing the energy structure and vigorously developing natural gas. Industry, timely development of coal liquefaction to oil, etc. Due to the advantages of oil shale resources and the characteristics of products, oil shale oil production has become one of the countermeasures. It is relatively easy to obtain shale oil from oil shale, and its composition and properties are similar to natural petroleum, so it is an ideal source of liquid fuel. With my country's entry into the WTO, it is inevitable that the pri...

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Problems solved by technology

[0003] my country has abundant kerogen shale reserves, but the oil content varies greatly. Although shale oil manufacturers in my country have produced shale oil for decades, they consider shale mines with a content of less than 5% to be unworthy. The extraction of shale oil results in a great waste of resources