Combined type gas full-cycle gas retort

Abstract

The invention discloses a gas retort, which comprises a plurality of retorting sub units and performs retorting and oil-refining to oil shale by the gas full-cycle technology. The combined type gas full-cycle gas retort is characterized by using gas generated in the retorting process of the oil shale as heat carrier to retort the oil shale, using cold gas to recycle semi-coke waste heat generated by the retorting of the oil shale, and using tracery walls to distribute the heat carrier, wherein a gas chamber, an inverted V-shaped beam, an inverted V-shaped baffle plate, tracery walls, a cooling water sleeve, a coke exhausting passage, a coke pusher, a scraper blade conveyor and a water sealing pond are arranged inside each retorting sub unit of the gas retort from top to bottom in sequence. The tracery walls of the retorting sub units are arranged vertical to the bottom part, and a passage is formed between every two tracery walls; spray holes for cold and heat recycle gases are arranged on the tracery walls. The actual daily capacity, which can reach more than 6000 tons, of the gas retort is in a direct proportion with the number of the retorting sub units. The combined type gas full-cycle gas retort is applicable to performing retorting and oil-refining to various oil shale with grain sizes of 5-75mm, low gas content, low fixed carbon content and low moisture content, and the oil recovery rate of the gas retort reaches about 90%.

Description

technical field

[0001] The invention relates to a technique and a device for carbonizing and refining oil shale by applying the gas full cycle technology. The carbonizing furnace is composed of several carbonizing sub-units. Background technique

[0002] At present, there are three domestic oil shale retort distillation methods. The first is the Fushun retort furnace, which has a cylindrical structure and is an internal combustion furnace. Saturated air is fed from the bottom of the retort furnace, and the oil shale in the upper part is retorted with the flue gas generated by combustion. In order to prevent the flue gas from being too high and coking in the furnace, a part of the gas at 550℃~650℃ is introduced into the upper part of the retort furnace. Adjust, the processing granularity is 12-75mm, and the single furnace processing capacity is 100 tons (see figure 1 ). The second type is the Maoming retort furnace, which has a square structure and is also an internal combu...

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