Dry deslagging and dry distillation furnace for small oil shale grains

Abstract

The invention discloses a dry deslagging and dry distillation furnace for small oil shale grains, and belongs to the technical field of dry distillation furnaces. The dry deslagging and dry distillation furnace comprises a furnace body, a gas collecting umbrella, a gas eduction tube, a high-temperature radiation heat exchange small ring tube, a high-temperature radiation heat exchange large ring tube, a cone grate, a flue gas heat exchange guide tube, a slag scraping plate, an in-furnace slag discharging transmission device, an air and saturated steam mixed furnace inlet, a slag discharging box, a water jacket cooling spiral conveyor and a steam sealing heat exchange inlet. A 5-13 mm or 5-20 mm oil shale raw material is subjected to dry distillation oil refining; a dry deslagging mode is adopted, the height of the slag scraping plate in the furnace is set, and the rotating speed of a motor is adjusted through an adjustable frequency converter in the in-furnace slag discharging transmission device to control the deslagging amount; after ash is discharged, steam with a certain pressure is used for blocking the gas in the furnace from overflowing, and a part of steam exchanges heat with high-temperature ash and is pumped into the furnace, so the heat efficiency of the dry distillation furnace is improved; and the ash slag is cooled with the steam, and then passes through the waterjacket cooling spiral conveyer, and ash slag semicoke is conveyed out of the furnace.

Description

technical field [0001] The invention belongs to the technical field of carbonization furnaces, in particular to a carbonization furnace for dry slag removal of small particles of oil shale. Background technique [0002] The currently used oil shale retort furnace sieves small particles, which cannot be used for oil refining, forming a large amount of solid waste, occupying a large amount of land, and, after accumulation, spontaneous combustion will generate a large amount of oil and gas, affecting and destroying the environment. About 75% to 85% of the undersize is 5mm to 20mm or 5mm to 13mm oil shale waste, resulting in a waste of oil shale resources. [0003] Existing patent: A small particle oil shale retort device (CN200910176747) is a retort device for small particle oil shale under sieving, but the retort device uses a single-layer heat exchange ring tube, the heat transfer is uneven and the The heat rate is low, and the dry distillation device uses wet slag removal, ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a dry distillation furnace for oil shale small particles to solve the problem that the currently used oil shale carbonization furnace cannot use small particle oil shale for oil refining, and the existing small particle oil shale The dry distillation unit has low heat transfer rate and uses wet slag removal, a large amount of solid waste, environmental pollution and other technical problems

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