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Coal solid heat carrier pyrolysis method and system for guide type stripping reinforced oil gas accelerated introduction

A solid heat carrier and guided technology, which is applied in the field of coal chemical industry, can solve the problems of reduced coal pyrolysis tar yield, intensified secondary cracking reaction, and increased resistance to oil and vapor export, so as to improve yield and overcome easy damage , Improve the effect of coal pyrolysis tar yield

Inactive Publication Date: 2014-04-16
DALIAN UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of producing semi-coke, coal tar and gas by solid heat carrier pyrolysis of coal, it is relatively simple to use a moving bed reactor to realize the coal pyrolysis process, but because the solid heat carrier pyrolysis process deals with powdery coal , with the increase of the reactor capacity, especially after reaching the scale of industrial production, the bed height of the coal pyrolysis reaction material in the moving bed reactor increases, and the export resistance of the oil vapor (referring to gaseous coal tar) generated by the coal pyrolysis reaction increases, Oil-gas polymerization reaction and secondary cracking reaction intensify, and coal pyrolysis tar yield decreases accordingly

Method used

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  • Coal solid heat carrier pyrolysis method and system for guide type stripping reinforced oil gas accelerated introduction
  • Coal solid heat carrier pyrolysis method and system for guide type stripping reinforced oil gas accelerated introduction
  • Coal solid heat carrier pyrolysis method and system for guide type stripping reinforced oil gas accelerated introduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Using the above-mentioned system to implement the coal solid heat carrier pyrolysis method of guided gas stripping and accelerated export of oil and gas, the percentages involved in the following examples are all mass percentages (%). The properties of the powdered coal used in the experiment are shown in Table 1.

[0040] Table 1 Properties of powdery coal (air dry basis)

[0041]

[0042] The raw material used in this embodiment is bituminous coal 1. The coal solid heat carrier pyrolysis method using guided gas stripping to strengthen the accelerated export of oil and steam is 0.24 tons / day pyrolysis test device. The specific operation process is shown in the appendix figure 2 ; The dried powdery bituminous coal 1 and heat carrier 2 are imported into the mixer 3 at a mixing ratio of 1:2.5, and the powdery bituminous coal 1 and the heat carrier 2 are mixed into a uniform powder in the mixer 3, and the powder It enters the moving bed reactor 4 from the bottom of t...

Embodiment 2

[0048] In this example, the raw material is lignite 2, and a 0.24 ton / day pyrolysis test device is used for coal solid heat carrier pyrolysis method using guided gas stripping to strengthen the accelerated export of oil and vapor. The specific operation process is shown in the appendix figure 2 . The dried powdery lignite 1 and the heat carrier 2 are introduced into the mixer 3 at a mixing ratio of 1:4, and the powdery lignite 1 and the heat carrier 2 are evenly mixed into a uniform powder in the mixer 3, and the powder It enters the moving bed reactor 4 from the bottom of the mixer, and a pyrolysis reaction occurs in the moving bed reactor. The pyrolysis reaction temperature is 550° C., and the residence time is 20 minutes. To generate pyrolysis gas 8 and semi-coke, a stripping gas inlet pipe is provided at the lower part of the reaction section of the moving bed reactor, from which the stripping gas 9 enters the moving bed reactor and is evenly distributed in the material l...

Embodiment 3～7

[0054] The specific raw materials used are lignite 1,2 and bituminous coal 1,2. The coal solid heat carrier pyrolysis method 0.24 tons / day pyrolysis test device using the guided gas stripping enhanced oil vapor accelerated export method, the operating process is the same as the above-mentioned embodiment 2, and the specific process parameters and product yield are shown in Table 4.

[0055] Table 4 Process parameters and product yield

[0056]

[0057] Note: 1 The coal-to-coke ratio refers to the mass ratio of the amount of hot semi-coke to the dried coal sample;

[0058] 2 The increase percentage of tar yield refers to the comparison with the non-gas stripped gas under the same production conditions.

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Abstract

The invention discloses a coal solid heat carrier pyrolysis method and a system for guide type stripping reinforced oil gas accelerated introduction. In the process that powder particles flow in a mix apparatus, the segmentation, diversion and remixing effects of a mixed element can be used for reaching the purpose of uniform mixing of the solid materials. A pyrolysis reaction is generated in a moving-bed reactor, stripping gas is introduced into a distributor and is combined with a pyrolysis gas gas collection device by intersecting to realize partial lowering and accelerated introduction of oil gas, oil gas polymerization and secondary cracking reaction can be minimized, and the coal pyrolysis tar yield can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a solid heat carrier pyrolysis method in the process of producing semi-coke, coal tar and coal gas by pyrolysis of coal. Background technique [0002] As a fossil energy resource, coal is clean, efficient, and comprehensively transformed and utilized, which is the future development direction. Coal pyrolysis-based polygeneration or cascade (sub-quality) utilization conforms to the principles of clean, efficient, and comprehensive transformation and utilization, and has attracted the attention of researchers and developers. Coal pyrolysis, as its main process unit, has received more attention. In the coal pyrolysis process, solid heat carrier pyrolysis is one of the important methods. In the process of producing semi-coke, coal tar and gas by solid heat carrier pyrolysis of coal, it is relatively simple to use a moving bed reactor to realize the coal py...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B49/18
CPCY02P20/129
Inventor 张秋民刘家强杨占彪匡国柱贾可王树宽胡浩权于才渊关珺何德民
Owner DALIAN UNIV OF TECH
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