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Destructive distillation method and device for brown coal

A technology for dry distillation and lignite, which is used in special forms of dry distillation, combined direct and indirect heating for dry distillation, and gas dust removal. The effect of low ash content, high gas calorific value and low dust content

Inactive Publication Date: 2014-08-13
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the external thermal pyrolysis of lignite has the problem of low thermal efficiency; the solid heat carrier has problems such as large dust in the gas and large ash content in semi-coke; the rapid pyrolysis of gas has a large amount of gas circulation, low thermal efficiency of heating and cooling cycle gas, and large dust in the gas. And other issues
There is no widely promoted production process and device

Method used

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  • Destructive distillation method and device for brown coal

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Embodiment

[0043] refer to figure 1 , the device of this embodiment comprises: drying furnace 14, dry distillation furnace 11, coke oven 12, feed bin 1, condenser 2, gas cooling purifier 4, bag filter 5, cyclone dust collector 6, fine coke powder bin 7, Air-flue gas heat exchange device 8 , semi-coke lifting device 9 , semi-coke cooling device 10 , steam coil 13 and coal gas particle dust removal device 3 .

[0044] Wherein the carbonization furnace 11 is located on the first floor of the production building, and the drying furnace 14 and the coke oven 12 are located on the second floor; coke.

[0045] The coal gas produced in the dry distillation process is dedusted by the intermittent particle dust collector, and the final semi-coke product is recovered after being cooled by the semi-coke cooling device 10 .

[0046] The specific dry distillation process is as follows:

[0047] Raw coal is lignite with particles smaller than 30mm.

[0048] The drying furnace 14 is a steam fluidized...

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Abstract

The invention relates to a destructive distillation method and device for brown coal. The destructive distillation method for brown coal comprises the following steps: fluidizing, drying and heating raw coal by circular steam; indirectly heating the preheated and dried raw coal by hot smoke and directly heating the preheated and dried raw coal by a hot carrier; taking one part of coal after destructive distillation as a semicoke product while the other part as circulating semicoke; sieving the circulating semicoke into coarse and fine cokes; heating the coarse semicoke by combusting the fine coke powder, and taking the heated coarse coke as the hot carrier, wherein the hot smoke required by destructive distillation of coal is from smoke generated by combusting fuel; and generating steam for drying the raw coal when semicoke is cooled. The device comprises a drying furnace, a destructive distillation furnace combining external heat with the hot carrier, a coal gas dedusting device of a coke oven, a semicoke cooling and lifting device and the like. The destructive distillation method for brown coal provided by the invention transfers heat comprehensively, and the energy consumption of brown coal for destructive distillation and pyrolysis is less, the content of coal gas dust is low, the heat efficiency is high and the ash content of coke powder is low.

Description

technical field [0001] The invention relates to coal dry distillation technology, in particular to a lignite dry distillation method and device. Background technique [0002] There are many technologies for pyrolysis and upgrading of lignite at home and abroad, but mainly include external heat pyrolysis, solid heat carrier pyrolysis, rapid gas pyrolysis, etc. Among them, the external thermal pyrolysis of lignite has the problem of low thermal efficiency; the solid heat carrier has problems such as large dust in the gas and large ash content in semi-coke; the rapid pyrolysis of gas has a large amount of gas circulation, low thermal efficiency of heating and cooling cycle gas, and large dust in the gas. And other issues. There is no widely promoted production process and device. Contents of the invention [0003] In view of the defects or deficiencies in the prior art, one of the objectives of the present invention is to provide a lignite dry distillation method. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B15/00C10B51/00C10B57/10C10B53/04C10B57/00C10B39/00C10K1/02
CPCY02P20/10
Inventor 赵鹏
Owner CHANGAN UNIV
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