Mixed dry-distillation oil refining method for wrapping oil shales with small particles and blocky oil shales, and wrapping bags

Abstract

The invention relates to a mixed dry-distillation oil refining method for wrapping oil shales with small particles and blocky oil shales, which is characterized in that a traditional gas heat carrier dry-distillation process or a traditional solid heat carrier rotating dry-distillation process is not changed, only oil shales with small particles, which are wrapped by using a plurality of wrappingbags and are smaller than 8mm, are mixed into blocky oil shales of 8 to 85mm in the working procedure of proportioning of the oil shales, the total weight of the oil shales with the small particles, which are wrapped by the wrapping bags and are smaller than 8mm, accounts for 20 to 30 percent of the total weight of dry-distillation oil shales, the dry-distillation oil refining of the oil shales can be realized by utilizing the traditional gas heat carrier dry-distillation process or the traditional solid heat carrier rotating dry-distillation process, the oil yield is more than 90 percent, resources can be utilized more effectively, the economic benefit is enhanced, and the environment protection is benefited. Open wrapping bags manufactured by at least one kind of fibre cloth of medium-alkali glass fibre cloth, alkali-free glass fibre cloth, asbestos fibre cloth and ceramic fibre cloth are adopted for the wrapping bags, and bag openings are sewn and sealed after the oil shales with the small particles, which are smaller than 8mm, are wrapped into the wrapping bags; and or, the wrapping bags are manufactured by metal nets.

Description

technical field [0001] The invention relates to the field of oil shale carbonization and refining, more specifically, a mixed carbonization and refining method of wrapping small-particle oil shale and massive oil shale and a wrapping bag, without changing the existing gas heat carrier carbonization process or solid On the premise of the heat carrier rotary dry distillation process, the small particle oil shale of <8mm can also be used for dry distillation and refining. Background technique [0002] The world's oil shale resources are very rich, and its deposits are all over the place, but its distribution is not even. According to existing statistics, the total proven oil shale reserves of 37 countries are converted into about 400 billion tons of shale oil, exceeding the world's proven recoverable oil reserves of 170 billion tons. The proven reserves of oil shale in the United States rank first in the world, converting to more than 300 billion tons of shale oil, accounti...

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Problems solved by technology

[0003] The existing oil shale retort equipment can usually only be used for 8-85mm oil shale lumps, but for about 20% of the oil shale small particles <8mm produced during mining, transportation and crushing At home and abroad, the following three methods are usually used for processing: one is to adopt new dry distillation equipment, which can realize oil shale <20mm for dry distillation and refining, such as: Fushun Mining Group introduced Australian ATP oil shale dry distillation equipment , the annual oil shale processing volume is 600,000 tons, but the equipment investment exceeds 1.7 billion yuan, which is seriously disproportionate to the income, and the technology of the carbonization equipment is not yet mature, and the oil yield is low, only 63-90%

The second is that the technology of making oil shale balls from small grains of oil shale <8mm by using a binder has been reported a lot at home and abroad. It is difficult for the binder not to decompose at a high temperature of 300°C, and the optimum temperature for oil shale carbonization is 550°C, and the oil shale balls made will expand and break at 500°C, which affects the heat conduction in the furnace and changes the temperature of the furnace. The thermal cycle affects the dry distillation effect, oil yield, and the production of oil shale pellets has a low pelleting rate, high cost, and lack of practical application value.

The third is to use heaping and discarding. At present, about 20% of the small particle oil shale of <8mm cannot be put into the carbonization furnace for carbonization and refining. It also takes up a large area of ​​land and pollutes the environment

[0004] So far, there have been no literature reports and practical applications on the method of packing small-grained oil shale < 8 mm in bags, and mixing small-grained oil shale < 8 mm with massive oil shale for dry distillation and refining.

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