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An oil shale/low-rank coal dry distillation process and device

A low-rank coal and oil shale technology, which is applied in the field of oil shale/low-rank coal carbonization technology and equipment, can solve the problems of high tar dust content and low tar recovery rate, and achieve quality improvement, production reduction, The effect of remarkable dust removal effect

Active Publication Date: 2021-05-07
BEIJING GUODIAN FUTONG SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of high tar dust content and low tar recovery rate in the dry distillation process for pyrolysis of small-sized oil shale / low-rank coal in the prior art, thereby providing a kind of tar Oil shale / low-rank coal dry distillation process and device with low dust content and high tar recovery rate

Method used

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  • An oil shale/low-rank coal dry distillation process and device
  • An oil shale/low-rank coal dry distillation process and device

Examples

Experimental program
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Effect test

Embodiment 1

[0043] This embodiment provides an oil shale / low rank coal dry distillation process, comprising the following steps,

[0044] S1: Pass hot flue gas into oil shale / low-rank coal, carry out winnowing and drying to oil shale / low-rank coal, remove moisture and dust in oil shale / low-rank coal, produce flue gas, wherein, The temperature of the hot flue gas is 180°C-350°C, such as 180°C, 200°C, 220°C, 250°C, 300°C, 350°C, etc.; calculated at the oil shale / low rank coal processing speed of 1t / h, the hot flue gas Gas flow rate is 2000Nm 3 / h-5000Nm 3 / h (Nm 3 is the standard cubic meter), such as 2000Nm 3 / h, 2500Nm 3 / h, 3000Nm 3 / h, 4000Nm 3 / h, 5000Nm 3 / h etc.;

[0045] S2: Pass the oil shale / low-rank coal after winnowing and drying into high-temperature gas for heating and dry distillation to produce raw coal gas and semi-coke;

[0046] S3: carry out dedusting and desulfurization treatment to the flue gas produced in winnowing drying, produce cold flue gas;

[0047] S4: ...

Embodiment 2

[0067] This embodiment provides an oil shale / low rank coal dry distillation device, such as figure 1 shown, including,

[0068] Air separation and drying device 1, used for air separation and drying treatment of oil shale / low rank coal;

[0069] Mixing chamber 2, is communicated with described winnowing and drying device 1, is used for producing the hot flue gas that oil shale / low rank coal is carried out winnowing and drying;

[0070] The dry distillation device is used to receive the oil shale / low-rank coal after winnowing and drying, and to heat and dry the oil shale / low-rank coal;

[0071] The combustion chamber 52 is communicated with the carbonization device, and is used to generate high-temperature gas for heating and carbonizing oil shale / low-rank coal;

[0072] Dust remover 11 and desulfurizer 12 connected in sequence, dust remover 11 and desulfurizer 12 communicate with the flue gas outlet of the described winnowing and drying device and the flue gas inlet of the d...

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Abstract

The invention provides an oil shale / low-rank coal carbonization process. Before the oil shale / low-rank coal is dry-distilled, the oil shale / low-rank coal is air-selected and dried to remove moisture and dust, especially After removing the dust in the oil shale / low rank coal, prevent the dust from entering the tar recovery system with the gas during the carbonization and pyrolysis process, and reduce the dust content in the tar. The dust removal and desulfurization treatment of the flue gas produced in winnowing and drying is used to cool the semi-coke, which can prevent dust and sulfur from penetrating into the semi-coke and improve the quality of the semi-coke. In addition, the high-temperature flue gas generated after cooling semi-coke is used to generate hot flue gas for winnowing and drying, which is circulated between equipment, so that the gas is reused and the amount of waste gas is reduced. At the same time, the thermal energy is fully utilized, and the thermal energy of the semi-coke is fully recovered.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to an oil shale / low-rank coal dry distillation process and device. Background technique [0002] Dry distillation is a reaction process in which solid or organic matter is heated and decomposed in the absence of air. The result of dry distillation is to generate various gases, steam and solid residues, and the mixture of gas and steam is divided into gas and liquid after cooling. Coal dry distillation is one of the important methods for chemical processing of coal. After coal dry distillation, the composition and aggregation state of the raw materials will change. The product contains solid, gaseous and liquid substances, and semi-coke, coal tar and Coke oven gas. [0003] Actual data show that a large amount of lump coal / shale and small particle size low-rank coal will be produced in coal mining production. Taking coal mining as an example, for manual mining, lump ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00C10B53/06C10B53/04
Inventor 石长江苗文华张东辉刘盼王兴坤刘大海
Owner BEIJING GUODIAN FUTONG SCI & TECH DEV