External heat type multilayer baking furnace for coal upgrading

A multi-layer roasting furnace and external heating technology, which is applied in coking ovens, special forms of dry distillation, petroleum industry, etc., can solve the problems of long process time and waste of coal resources, and achieve good quality, high production efficiency, and elimination of coal materials. overheating effect

Inactive Publication Date: 2015-12-09
刘东远
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional vertical square furnace and internal heat pyrolysis method can only use lump coal (particle size > 20mm) because of its heating needs to be in full contact with the air, which is a great waste of coal resources
At the same time, the traditional upright cubic internal thermal pyrolysis method has a very long process time, and it takes 6 to 7 hours to complete a dry distillation

Method used

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  • External heat type multilayer baking furnace for coal upgrading
  • External heat type multilayer baking furnace for coal upgrading
  • External heat type multilayer baking furnace for coal upgrading

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Using coal from a certain area in Xinjiang, the technical indicators are as follows:

[0044] Particle size: <20mm;

[0045] Total moisture (MT): 18-22%;

[0046] Ash content (Ad): 8-10%;

[0047] Volatile matter (Vad): 40-45%;

[0048] Calorific value (Qgr): 4000~5000kcal / kg;

[0049] Viscosity (R.I): <10;

[0050] The scheme of the present invention adopted is as follows: an outer furnace body 1 with a heating device is included, a heating furnace 2 is arranged in the outer furnace body 1, a feeding port 21 and a gas collection port 22 are arranged on the top of the heating furnace 2, and a heating furnace 2 bottom is provided with Outlet 23, at least 3 layers of furnace trays 24 are arranged at intervals along the height direction in the heating furnace 2, the furnace tray 24 of the Nth layer has a middle part feeding hole 241, and the N+1th layer of furnace tray 24 has an end feeding hole 242, Form an S-shaped feeding channel. The heating device is that a hot ...

Embodiment 2

[0060] The furnace tray 24 is made of alloy steel materials shown in Table 3, all of which can well meet the working conditions of the present invention.

[0061] Table 3 alloy steel composition

[0062]

Embodiment 3

[0064] Table 4 Comparison between the present invention and the internal heating type vertical square furnace quality improvement process

[0065]

[0066] It can be seen from the comparison in Table 4 that:

[0067] The raw material requirement of the traditional internal heating vertical square furnace upgrading process is higher than that of the present invention, and its production cost is relatively high, resource utilization rate is relatively low and production efficiency is low.

[0068] The quality of the semi-coke produced by the upgrading process of the internal heating type vertical square furnace is lower than that of the present invention, and the semi-coke produced by the present invention can replace part of anthracite as a fuel for blast furnace injection in the iron and steel industry; as a reducing agent for metallurgical industry; activation Washing process produces activated carbon or adsorbent, which is used for the treatment of waste water and waste g...

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Abstract

The present invention relates to an external heat type multilayer baking furnace for coal upgrading, and belongs to the technical field of coal coking equipment. The external heat type multilayer baking furnace comprises an outer furnace having a heating device, wherein a heating furnace is arranged inside the outer furnace, the top portion of the heating furnace is provided with a material inlet and a coal gas collection port, the bottom portion of the heating furnace is provided with a material outlet, at least three layers of furnace trays are arranged inside the heating furnace along the height direction at intervals, the N-layer furnace tray is provided with a middle portion material discharge hole, and the N+1-layer furnace tray is provided with an end portion material discharge hole so as to form a S-shaped material discharge channel. According to the present invention, the external heat type heating pyrolysis way and the turning-back type S-shaped material discharge are performed on the coal, such that the produced coal gas is pure and has the high heat value, the semi-coke quality is good, and the production efficiency is high.

Description

technical field [0001] The invention relates to an externally heated multi-layer roaster for coal quality improvement, belonging to the technical field of coal coking equipment. Background technique [0002] Coal upgrading refers to the process of removing moisture from coal by physical or chemical methods, accompanied by changes in the composition and structure of coal. At present, the traditional coal upgrading method at home and abroad is to use the vertical square furnace to carry out the internal heat pyrolysis upgrading method. The internal heating type is to transfer heat to the coal material by means of a heat carrier, and the gas heat carrier directly enters the retort chamber, passes through the block-shaped retort material layer, and transfers heat to the material layer. The internal heat upgrading process is divided into gas heat carrier upgrading process and solid heat carrier upgrading process according to the difference of heating medium. The gas heat carrie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00
Inventor 刘东远朱尉铭
Owner 刘东远
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