Complete alternation gas retort for treating 300 tons of wax shale mash gas a day

Abstract

The invention discloses equipment for carrying out carbonization on oil shale by utilizing gas as a heat carrier under the state of full circulation, which is suitable for processing the oil shale of 6 to 50mm; the daily processing capacity of the equipment is 300 tons and the oil yield is more than 90 percent. No gas engine is arranged in a carbonization furnace and no gas enters the carbonization furnace; all the heat needed by carbonization can be completely supplied by circulation gas. The oil shale through pre-heating carbonization enters the carbonization furnace from the upper part. A cloth tracery wall and a gas distribution structure the sizes of which are corresponding to that of the grains of the oil shale are arranged in the carbonization furnace. The thermal circulation gas of 700 DEG C is evenly and continuously fed into the middle part of the carbonization furnace. The cold circulation gas enters the carbonization furnace from the lower part to cool the semi-cokes after carbonization to 250 DEG C and the semi-cokes are discharged into a water-sealed semi-coke pool to be cooled to 80 DEG C and discharged outside the furnace by a drawing template. The highest temperature in the carbonization furnace is controlled below 550 DEG C, thus not only ensuring the complete carbonization of the oil shale, but also avoiding the problems like over-heating and caking.

Description

Technical field

[0001] The invention relates to a device for dry distillation of oil shale under the state of full circulation of gas by using gas as heat carrier. It is suitable for processing 6-50mm oil shale, with a daily processing capacity of 300 tons. The oil yield is above 90%. There is no internal combustion device in the carbonization furnace, no air enters, and all the heat required for carbonization is supplied by circulating gas. Background technique

[0002] At present, the domestic oil shale dry distillation refining method, one is the Fushun type circular furnace, which is semi-internal combustion, semi-circulation, with a large amount of water vapor and air entering, the oil recovery rate is 60-65%, and the processing particle size is 12-75mm. The processing capacity of a single furnace is 100 tons. A Maoming square furnace is a full internal combustion type, with air entering, the oil recovery rate is about 70%, and the treatment particle size is 30-120mm...

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