Complete alternation gas retort for treating 300 tons of wax shale mash gas a day
A dry distillation furnace and oil shale technology, which is applied in special forms of dry distillation, coke ovens, petroleum industry, etc., can solve the problems of ineffective use of semi-coke, expensive imported equipment, small daily processing capacity, etc., and prolong life. and continuous working hours, reduced construction investment, and the effect of large processing capacity
Active Publication Date: 2009-04-08
辽宁成大能源科技有限公司
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[0003] The purpose of the present invention is to solve the problems of small daily processing capacity, large floor area, low oil recovery rate, environmental pollution, semi-coke not being effectively utilized, and expensive imported equipment in current domestic oil shale retorting refineries, and to provide a Large daily processing capacity, high oil recovery and environmentally friendly oil shale retort furnace
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[0009] The main points of the specific embodiment of the present invention: one is to ensure that the temperature of the retort section in the furnace is stable at about 550°C, neither too high nor too low, if it is too high, it will cause overheating, if it is too low, it will cause incomplete retort. This can be achieved by properly adjusting the ratio of the 700°C thermal cycle gas entering the middle and the 80°C cold cycle gas entering the lower part. The second is to ensure balanced contact between materials and circulating gas, in order to ensure balanced dry distillation. Therefore, the furnace is equipped with a herringbone distribution board and a flower wall to adjust the direction of the air flow; thirdly, a water seal and a cooling water jacket are installed at the lower part of the furnace, which are used to absorb the heat of semi-coke and prevent the gas from leaking out to protect the environment.
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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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IPC IPC(8): C10B53/06
Inventor 吴启成王志奉曹庆喜王鸿治孙朝辉姚桃清刘明伦
Owner 辽宁成大能源科技有限公司
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