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Low temperature distillation method and device for high volatile component weak viscosity coal

A high-volatile, weakly sticky coal technology, used in special forms of dry distillation, the preparation of liquid hydrocarbon mixtures, and the petroleum industry. The effect of junction, heat transfer rate and heat transfer intensity improvement

Inactive Publication Date: 2006-11-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the actual coal mining process, the output of lump coal (with a particle size of 25 mm to 100 mm) that can be used for dry distillation in the "continuous vertical carbonization furnace" is very limited, and a large amount of fine-grained coal is produced. These fine-grained coal Mutual sticking will occur in the above continuous vertical carbonization furnace, causing gas channeling in the furnace, charge blockage and shutdown

Method used

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  • Low temperature distillation method and device for high volatile component weak viscosity coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dried raw coal with a diameter of 1mm to 13mm (Fugu coal sample: water content M ad =5.5%, volatile matter V ad= 35.05%) The input riser moves the two side-by-side coal scuttles on the top of the external thermal retort furnace on both sides, and flows through the coal scuttle continuously through the coal scuttle from the coal inlet 6 at the upper end of the middle casing 2 to flow between the middle casing 2 and the inner casing 1 The coal material stays in the furnace for 30 minutes and the coal material is separated from each other by the multi-layer inverted cone baffle plate 13 during the downward movement, and the coal material is separated by the rotation of the inner casing 1. Agitation, displacement, and surface renewal, while being indirectly heated by high-temperature flue gas on both sides to precipitate moisture and volatile products, and finally produce semi-coke that is continuously discharged from the bottom of the carbonization furnace. When the carbo...

Embodiment 2

[0029] Example 2: The residence time of the coal in the retort furnace is within 70 minutes. When the retort temperature (the temperature at the bottom of the retort furnace body) is 540° C., the semi-coke V after retort is ad =18.3% (corresponding to 48% of the total volatile matter that has been removed).

Embodiment 3

[0030] Example 3: The residence time of the coal material in the retort furnace is within 50 minutes. When the retort temperature (the bottom temperature of the retort furnace body) is 658° C., the semi-coke V after retort is ad =12.9% (corresponding to 63% of the total volatile matter that has been removed).

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Abstract

The invention discloses a low-temperature retorting method of high-volatile flux fine particle, which is characterized by the following: the method adopts vertical pipe with inner, middle and outer concentric casing to move two sides of outer heat retort furnace, which produces char coal, gas and tar; the needed energy of retorting is provided by fine grain coal in the middle casing ring-shaped space from inner and outer casing high-temperature gas, which proceeds drying and charring steps; the steam and char volatile product are guided out of upper segment steam and lower segment char hole separately; the char coal falls in the char furnace chassis discharger, which is discharged from outlet.

Description

technical field [0001] The invention belongs to a low-temperature dry distillation method, in particular to a low-temperature dry distillation method and device for fine-grained weakly caking coal with high volatile content (volatile content greater than 35%). Background technique [0002] It has been more than 100 years to produce tar, high calorific value gas and semi-coke from high-volatile coal by dry distillation. Especially when dealing with viscous coal materials, external heat dry distillation furnaces with different structures are often selected in industry ( The furnace body is still or rotates) to carry out. In my country, for the coking and gas-making process of weakly cohesive lump coal (particle size 25mm ~ 100mm), Anshan Coking Refractory Design and Research Institute also carried out a special design of external heating "continuous vertical carbonization furnace" in the 1980s. The continuous operation of coal supply, dry distillation and coke discharge has be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10G1/00
Inventor 张济宇
Owner FUZHOU UNIV
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