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Carbonaceous material pyrolysis system and pyrolysis process thereof

A carbonaceous material and pyrolysis technology, which is applied to the endothermic pyrolysis system and its process field, and can solve the problems of pyrolysis gas back-mixing, pressure fluctuation, etc.

Active Publication Date: 2014-01-15
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, regenerative heat exchange switching will bring problems such as pressure fluctuations and pyrolysis gas back-mixing.

Method used

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  • Carbonaceous material pyrolysis system and pyrolysis process thereof
  • Carbonaceous material pyrolysis system and pyrolysis process thereof
  • Carbonaceous material pyrolysis system and pyrolysis process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] use image 3 The pyrolysis system and process of the present invention shown pyrolyze lignite coal whose coal quality analysis data are shown in Table 1 below.

[0056] Table 1

[0057]

[0058] The process scale of this example is 1 million tons / year (3500 tons / day), and the raw coal S1 feed rate is 145 tons / hour.

[0059] 1) After the raw coal S1 is crushed to ≤50mm, it enters the drying device 1 and is heated to about 200°C to remove most of the moisture. After drying, the moisture content of the coal is about 5%;

[0060] 2) The dry tail gas S5 from the drying device 1 has a temperature of about 110°C. After being dedusted by the gas-solid separator 11, about 70% is used as the circulating tail gas S8, and the rest S13 is discharged into the atmosphere after desulfurization and other treatments; the circulating tail gas S8 is mixed with the waste heat gas S17 from the solid medium heater 6 to about 300°C, and enters the drying device 1 as the drying medium S21;...

Embodiment 2

[0069] use image 3 The pyrolysis system and process of the present invention shown pyrolyzes long flame coal whose coal quality analysis data are shown in Table 2 below.

[0070] Table 2

[0071]

[0072]

[0073] The process scale of this example is 1 million tons / year (3500 tons / day), and the raw coal S1 feed rate is 145 tons / hour.

[0074] 1) After the raw coal S1 is crushed to ≤50mm, it enters the drying device 1 and is heated to about 180°C to remove most of the moisture. After drying, the moisture content of the coal is about 1%;

[0075] 2) The dry tail gas S5 from the drying device 1 has a temperature of about 110°C. After being dedusted by the gas-solid separator 11, about 50% is used as the circulating tail gas S8, and the remaining part S13 is discharged into the atmosphere after desulfurization and other treatments; the circulating tail gas S8 is mixed with the waste heat gas S17 from the burner 6 to about 300°C, and enters the drying device 1 as the dryin...

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Abstract

The invention discloses a coal pyrolysis system and process. The system comprises a drying device, a pyrolysis device, an optional cooling device, a liquid oil recovery unit and a heat carrier heating unit, wherein the drying device is used for drying coal; the pyrolysis device is optionally communicated with the drying device, coal or dried coal are pyrolyzed in the pyrolysis device by utilizing heat of a gas heat carrier so as to generate coarse pyrolysis gases and solid pyrolysis products; the optional cooling device is communicated with the pyrolysis device, and is used for cooling or passivating the solid pyrolysis products; the liquid oil recovery unit is connected with the pyrolysis device in a gas phase mode, receives the coarse pyrolysis gases generated by the pyrolysis device, and condenses the coarse pyrolysis gases so as to obtain the liquid oil and the net pyrolysis gases; the heat carrier heating unit is communicated with the pyrolysis device, and is used for heating solid media and / or cold solid media which move in the heat carrier heating unit in a circulation mode, and heating the pyrolysis gases by utilizing the heated solid media so as to generate a gas heat carrier and cold solid media.

Description

technical field [0001] The invention relates to a carbonaceous material pyrolysis system and a process thereof, in particular to an internal heat type pyrolysis system for producing medium calorific value gas and a process thereof. Background technique [0002] In the context of the increasing shortage of global oil and gas resources, how to rationally utilize coal resources in a low-cost and environmentally friendly manner to realize coal's supplementation and even substitution of oil and gas resources has become an important research topic in the energy industry. [0003] After many years of research and a large number of experiments, it can be determined that the rational utilization of coal resources is to refine and comprehensively utilize coal according to the different characteristics of coal quality and coal types. Drying and pyrolysis technology is one of the basic ways for coal graded refining and comprehensive utilization. Generally, the pyrolysis of solid carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B49/02C10B57/10
Inventor 秦强李初福翁力卢洪刘科
Owner CHNA ENERGY INVESTMENT CORP LTD