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A method for pyrolyzing coal using a regenerative rotary furnace

A rotary furnace, regenerative technology, used in coke ovens, special forms of dry distillation, petroleum industry and other directions, can solve the problems of difficult removal, complex treatment process, low single furnace output, etc., to achieve short process, high efficiency and simple process. Effect

Inactive Publication Date: 2011-12-14
BEIJING HUAFU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Taking the vertical furnace as an example, there are at least the following disadvantages: poor control of residence time, uneven temperature control, low output of a single furnace, and poor quality uniformity of the semi-coke obtained; the mixture of flue gas and retort gas makes the subsequent treatment process complicated; Part of the coal powder will be brought out with dry distillation gas, and the tar obtained by water cooling will contain coal powder, which is difficult to remove

Method used

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  • A method for pyrolyzing coal using a regenerative rotary furnace
  • A method for pyrolyzing coal using a regenerative rotary furnace
  • A method for pyrolyzing coal using a regenerative rotary furnace

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The regenerative rotary furnace structure described in embodiment 1

[0031] Such as figure 1 As shown, the regenerative rotary furnace includes a furnace wall 1, a furnace roof 2 and a furnace bottom 3, and the furnace wall, furnace roof and furnace bottom form a furnace 4; the furnace bottom is a rotary furnace bottom, Horizontal rotation in the furnace; the upper space of the furnace is provided with one or more regenerative radiant tubes 5 .

[0032] Such as figure 1 As shown, the regenerative radiant tube is a straight tube.

[0033] or, as in figure 2 As shown, the regenerative radiant tube is a U-shaped tube.

[0034] or, as in image 3 As shown, the regenerative radiant tube is a W-shaped tube.

[0035] Such as figure 2 with image 3 As shown, one end of the regenerative radiant tube is provided with a burner 6 , the burner is provided with a gas inlet 7 and an air inlet 8 , and the other end of the regenerative radiant tube is a flue gas outlet 9 .

...

Embodiment 2

[0039] Embodiment 2 Utilizes the method for thermally decomposing coal in a regenerative rotary furnace

[0040] The method comprises the steps of:

[0041] 1), crushing and drying: crushing, screening and drying the raw materials to be pyrolyzed;

[0042] The crushing particle size is 10-100 mm; raw materials larger than 100 mm are further crushed and sieved, and raw materials smaller than 10 mm are pressed into pellets.

[0043] 2) Cloth pyrolysis: Distribute the crushed and dried raw materials on the bottom of the regenerative rotary furnace through the distributing device, heat to 400°C-700°C, keep for 30-120 minutes, and the raw materials are pyrolyzed Generate semi-coke and dry distillation gas;

[0044] 3) Discharge: semi-coke is discharged through the discharge device, and semi-coke at 400°C-700°C is quenched and sent to the finished product yard; the dry distillation gas is separated from oil and gas to obtain product tar and raw gas.

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Abstract

The invention discloses a method for pyrolyzing coal in a regenerative rotary furnace, which is to distribute a certain amount of raw materials to be pyrolyzed into the bottom of the rotary furnace through a distributing device after being crushed, screened and dried, and adopts the method of radiation Heat to 400-700°C without air, and keep for 30-120 minutes. After the dry distillation gas from the top of the rotary furnace is separated from oil and gas, tar and crude gas are obtained. The solid product discharged from the bottom of the rotary furnace through the discharge device is cooled to obtain semi-coke. The method of the invention has simple process, high efficiency, does not need gas or solid heat carrier, and is suitable for coal types of various qualities.

Description

technical field [0001] The invention relates to a method for pyrolyzing coal by using a regenerative rotary furnace. Background technique [0002] my country's coal resources are abundant and cheap, but they have not been widely used for a long time. [0003] With the rapid development of the national economy and the implementation of the western development strategy, how to effectively develop and utilize coal, especially low-grade coal, has attracted much attention. [0004] Coal is heated under air-isolated conditions, and a complex process of a series of physical changes and chemical reactions at different temperatures is called coal pyrolysis or coal carbonization. Coal dry distillation can obtain semi-coke, tar and raw gas, tar can be hydrotreated to obtain gasoline and diesel components, and raw gas can be used as chemical raw materials. [0005] The pyrolysis of coal is one of the important processes of coal chemical industry. According to the difference in the fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B53/00C10B53/02C10B53/06C10B57/00
CPCY02E50/14Y02E50/10
Inventor 吴道洪丁力
Owner BEIJING HUAFU ENG
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