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Method and device for low temperature carbonization and pyrolysis of low-rank coal and oil shale

A technology of oil shale and low-rank coal, which is applied in the field of large-scale internal heating vertical furnace dry distillation process and use equipment, can solve the problems of increasing cost, restricting the comprehensive utilization of coal tar and gas deep processing, etc., to increase the calorific value and increase the use value , the effect of increasing the content

Active Publication Date: 2013-12-25
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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Problems solved by technology

This increases the cost of subsequent processing of coal tar and gas, and to a certain extent restricts the comprehensive utilization of further deep processing of coal tar and gas

Method used

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  • Method and device for low temperature carbonization and pyrolysis of low-rank coal and oil shale
  • Method and device for low temperature carbonization and pyrolysis of low-rank coal and oil shale
  • Method and device for low temperature carbonization and pyrolysis of low-rank coal and oil shale

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Embodiment

[0029] The gas preheating device includes a regenerative combustion furnace 1, which uses low calorific value gas as fuel to generate high-temperature flue gas at 1000-1300°C. The end and bottom of the regenerative combustion furnace 1 are equipped with double regenerative burners. There are radiant tube preheaters 4 evenly distributed inside; the regenerative combustion furnace 1 provides heat for the gas preheating device, and the radiant tube preheater 4 is the preheating system of the gas preheating device. Due to the adoption of regenerative combustion technology, It can maximize gas utilization and reduce fuel consumption.

[0030] The low calorific value gas sent from the gas purification workshop passes through the bottom double regenerative burner 2 and the end double regenerative burner 3 of the regenerative combustion furnace 1 to burn to produce high temperature flue gas of about 1000-1300 ℃, which will be sent by the gas purification workshop The cold gas sent ent...

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Abstract

The invention relates to a method and a device for low temperature carbonization and pyrolysis of low-rank coal and oil shale. The method comprises the steps of preheating coal gas to 700-800 DEG C with a coal gas preheating device, and then allowing the coal gas to enter an internal thermal vertical retort suitable for hot coal gas carbonization through a pipeline for carbonization and growth into flame coal, non-caking coal and weakly caking coal, wherein the coal gas preheating device consists of a heating system and a preheating system. The method and the device have the advantages that the cooled coal gas is preheated by the coal gas preheating device; high-quality iron alloy coke and calcium carbide coke are produced through a heating mode of the vertical retort and improvement of a retort structure, contents of hydrogen and methane in the coal gas are increased simultaneously, a content of nitrogen is reduced, and a calorific value of the coal gas is increased. The method and the device provide high-quality raw materials for comprehensive utilization of the coal gas for hydrogen, methanol and LNG (liquefied natural gas) preparation, by-product coal tar and the coal gas can be further deeply processed, and a use value is increased.

Description

technical field [0001] The invention relates to the technical field of vertical furnaces, in particular to a large-scale internal heat vertical furnace carbonization process and a device for carbonizing low-rank coal and oil shale with hot gas. Background technique [0002] Northwest my country is rich in low-ash, low-sulfur, high-volatility long-flame coal, non-caking coal and weakly caking coal resources. Dry distillation of this coal can produce high-quality ferroalloy coke and calcium carbide coke, and at the same time Coal tar and gas are produced. Coal tar and coal gas are further processed and comprehensively utilized. Coal gas is mainly used to produce hydrogen, methanol, LNG and other clean fuels with high added value. However, at present, the internal heating type vertical furnace uses the hot waste gas generated by coal gas combustion to carbonize the coal material. The gas produced by the carbonization furnace has a low calorific value, low hydrogen and methane c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B53/06C10G1/00
Inventor 陈巍李念慈李宝东吴萍丑明方会斌
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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