Coal low temperature dry distillation method

A low-temperature, dry distillation technology, applied in the field of coal dry distillation, can solve the problems of high energy consumption and difficult processing, and achieve the effects of improving dry distillation efficiency, reducing the amount of fine powder and preventing clogging

Inactive Publication Date: 2015-12-02
CHINA COAL ENERGY HEILONGJIANG COAL CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a low-temperature coal dry distillation method to solve the technical problems of high energy consumption and difficult processing of the existing pulverized coal that needs to be pressure-molded before it can be dry-distilled

Method used

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  • Coal low temperature dry distillation method

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specific Embodiment approach 1

[0027] Specific Embodiment 1: In this embodiment, the coal low-temperature carbonization method includes a coal preparation unit, a carbonization unit, a carbonization tail gas recovery unit, and a carbonization heat source generation unit. The coal low-temperature carbonization method is as follows:

[0028] 1. Coal preparation unit:

[0029] The coal is crushed into coal powder with a particle size of less than 10mm, and sent to the airflow dryer 6, and the coal powder enters the classifier 7 along with the hot flue gas for particle size classification, so that the coal powder larger than 0.5mm after classification is sent through the rotary valve 15. Enter the retort furnace 16, the coal powder with particle size less than 0.5mm enters the bag type dust collector 8 for dust removal along with the dry tail gas, and the heat source required by the airflow dryer 6 is provided by the incinerator 12;

[0030] 2. Dry distillation unit:

[0031] In step 1, the pulverized coal sen...

specific Embodiment approach 2

[0036] Specific embodiment two: the difference between this embodiment and specific embodiment one is that a part of the tail gas after the bag filter 8 dedusts in step one is sent into the chimney by the induced draft fan 14 through the incinerator 12, and a part is sent back to incineration by the circulating fan 9 The hot flue gas outlet of the furnace 12 is used as dry mixed temperature air, and the dust collected by the bag filter 8 is merged by the dust collector conveyor and sent to the mixing humidifier 11 through the rotary valve 10 for processing. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0037] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the retort furnace 16 in step 1 is a lined internal heat rotary cylinder furnace. Others are the same as those in the first or second embodiment.

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Abstract

The invention discloses a low-temperature dry distillation method of coal, relates to the technical field of full and reasonable utilization of coal resources and particularly relates to a dry distillation method of coal. The method disclosed by the invention can be used for solving the technical problem that the energy consumption is high and the treatment difficulty is great as existing coal ash cannot be dry-distilled until being compressed and moulded. According to the low-temperature dry distillation method of coal, a coal preparation unit, a dry distillation unit, a dry distillation tail gas recovery unit and a dry distillation heat source generating unit are adopted. The coal gas generated by dry distillation is heated by adopting a heat storage type heating furnace as a dry distillation heat source, so that the heat value of the dry distillation coal gas is improved to the maximum extent. A dry distillation grading system is arranged, so that the amount of fine powder entering into a dry distillation furnace is reduced while improving the dry distillation efficiency, and thus the load of oil-sludge separation by a tail gas treatment system is reduced.

Description

technical field [0001] The invention relates to the technical field of fully and rationally utilizing coal resources, in particular to a coal dry distillation method. Background technique [0002] Developing coal drying, dry distillation, upgrading, processing and comprehensive utilization industries can effectively alleviate the tight supply of high-quality thermal coal, use low-grade coal to broaden the resource channels of high-quality thermal coal, extend the industrial chain of the coal industry, and improve the comprehensive utilization of coal resources The efficiency and environmental benefits of coal utilization can better meet domestic energy demand and provide a strong security guarantee for national economic development. [0003] There are many coal dry distillation (pyrolysis) upgrading processes, and the dry distillation process is an endothermic process, which can be divided into external heat type and internal heat type according to different heat supply meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/04C10B57/10C10B57/14C10K1/08
Inventor 陈庆良赵旭张志华詹仲福王正忠孙中心徐俭臣令永功牛玉梅窦岩赵长林杨少华杨洪文高妍王伟东董青生徐立新洪利强戴伟姜海潮刘晓生初海滨张学权王洪升刘跃高天宇
Owner CHINA COAL ENERGY HEILONGJIANG COAL CHEM
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