Device for improving quality of coal by pyrolysis

A technology of coal pyrolysis and pyrolyzer, which is applied in direct heating carbonization, gas dedusting, petroleum industry, etc. It can solve the problems of low heat utilization rate, low quality of tar, poor effect of pyrolysis dedusting, etc., and achieve simplified operation and high efficiency. Dust removal efficiency, effect of solving tar dust clogging

Active Publication Date: 2009-12-23
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an improved coal pyrolysis upgrading device to overcome the defects of low heat utilization rate, poor pyrolysis dedusting effect and low tar quality in the prior art

Method used

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  • Device for improving quality of coal by pyrolysis
  • Device for improving quality of coal by pyrolysis
  • Device for improving quality of coal by pyrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Baorixile lignite with a particle size of ≤30mm (see Table 1 for coal quality analysis data) is continuously fed into the rotary dryer at a rate of 1.5t / h, and flows through the rotary dryer in parallel with hot flue gas at a temperature of about 460°C. During this process, the lignite and the hot flue gas exchange heat directly, and the moisture contained in the lignite is removed as much as possible. In the rotary dryer, the lignite raw material and the hot semi-coke from the pyrolyzer are subjected to indirect heat exchange at the same time, the raw coal and the hot flue gas flow through the inner sleeve, and the hot semi-coke flows through the inner sleeve and the inner sleeve of the rotary dryer. The annular space formed between the outer cylinders. Finally, the lignite is heated to about 130°C, the moisture in the lignite is reduced to about 4%, and the hot semi-coke is cooled to about 180°C.

[0051] The dried lignite at about 130°C and the high-temperature semi...

Embodiment 2

[0058] Raw material coal that present embodiment adopts, test device are identical with embodiment 1, and main operation step is also substantially identical with embodiment 1, and main difference is as follows:

[0059] The lignite is continuously fed into the rotary dryer at a rate of 1.5t / h, where it exchanges heat with hot flue gas at a temperature of 440°C and is dehydrated. Finally, the lignite is heated to 110°C, its moisture is reduced to about 6%, and the semi-coke product is cooled to Around 220°C.

[0060] The dried lignite and the hot semi-coke at about 750°C from the heating rotary kiln are mixed with a screw mixer at a weight ratio of 1:6, and then sent to the moving bed pyrolyzer. The lignite raw material and the high-temperature semi-coke are directly exchanged and Pyrolysis occurs to generate hot semi-coke and gas containing tar vapor, and the final pyrolysis temperature is about 650°C.

[0061] The gas containing tar vapor generated in the moving bed pyrolyz...

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Abstract

The invention provides a device for improving the quality of the coal by pyrolysis, comprising a rotary drier, a pyrolyzer and a heating rotary kiln. The rotary drier is used for receiving and drying raw coal with granularity being less than and equal to 30mm, and is provided with a sleeve structure to directly change heat between the raw coal and the hot flue gas and indirectly change heat between the raw coal and hot semicoke; the pyrolyzer receives mixture of the dried raw coal and the high-temperature semicoke by a feed line of solid material, directly changes heat between the raw coal and the hot semicoke, pyrolyzes the mixture, and is further provided with a heat clamping sleeve accompanied with high-temperature flue gas; and the heating rotary kiln is used for receiving the hot semicoke from the pyrolyzer and processing the hot semicoke by the means of heating. The device for improving the quality of the coal by pyrolysis has flexible operation, good quality of the generated semicoke and the generated tar, high cascade utilization of energy and high system thermal efficiency, properly solving the technical problems such as dust and tar blocking, high dust content in the tar, etc.

Description

technical field [0001] The invention relates to a coal pyrolysis upgrading device, more specifically, a device especially suitable for the low coalification degree coal pyrolysis upgrading process. Background technique [0002] Coal with low degree of coalification refers to lignite and bituminous coal with a low degree of metamorphism. Among them, low-metamorphic bituminous coal includes long-flame coal, non-caking coal, weakly caking coal, gas coal, etc., and its total amount accounts for more than 50% of my country's coal reserves. The characteristics of coal quality are: high volatile content, low-temperature pyrolysis tar yield High chemical reactivity, high comprehensive development and utilization value. Pyrolysis (or dry distillation) is a commonly used coal processing and utilization technology. Since the 1970s, the development of coal pyrolysis upgrading technology has generally received attention, and researchers have successively developed a variety of processes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B49/18C10B57/10C10B43/04C10K1/02
Inventor 郭治杜铭华杜万斗霍卫东张翠清麻林仝胜录王晓雷
Owner CHNA ENERGY INVESTMENT CORP LTD
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