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Method for improving coal quality through multi-layer roaster

A multi-layer roaster and coal technology, which is applied in the field of coal coking, can solve the problems of long process time and waste of coal resources, and achieve the effect of low process requirements, high production efficiency and guaranteed contact

Inactive Publication Date: 2015-11-25
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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  • Method for improving coal quality through multi-layer roaster
  • Method for improving coal quality through multi-layer roaster
  • Method for improving coal quality through multi-layer roaster

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Using coal from a certain area in Xinjiang, the technical indicators are as follows:

[0047] Particle size: <20mm;

[0048] Total moisture (MT): 18-22%;

[0049] Ash content (Ad): 8-10%;

[0050] Volatile matter (Vad): 40-45%;

[0051] Calorific value (Qgr): 4000~5000kcal / kg;

[0052] Viscosity (R.I): <10;

[0053] The scheme of the present invention that adopts is: adopt multi-layer roasting furnace, multi-layer roasting furnace comprises outer furnace body 1 with heating device, is provided with heating furnace 2 in outer furnace body 1, and heating furnace 2 top is provided with feed inlet 21, coal gas A collection port 22, a discharge port 23 is provided at the bottom of the heating furnace 2, and at least 3 layers of furnace plates 24 are arranged at intervals along the height direction in the heating furnace 2, and the furnace plate 24 of the Nth layer has a middle feeding hole 241, and the N+1 layer The furnace tray 24 has an end feeding hole 242, forming a...

Embodiment 2

[0066] The furnace tray 24 adopts the alloy steel materials shown in Table 4, all of which can well meet the working conditions of the present invention.

[0067] Table 4 alloy steel composition

[0068]

Embodiment 3

[0070] Table 5 Comparison table between the present invention and internal heating type vertical square furnace quality improvement process

[0071]

[0072] It can be seen from the comparison in Table 5 that:

[0073] 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.

[0074] 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...

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Abstract

The invention relates to a method for improving coal quality through a multi-layer roaster, and belongs to the technical field of coal coking. The multi-layer roaster is adopted and comprises an outer roaster body provided with a heating device. A heating furnace is disposed in the outer roaster body. A feed inlet and a gas collecting port are formed in the top of the heating furnace. A discharge opening is formed in the bottom of the heating furnace. At least three layers of roaster plates are arranged in the heating furnace in the height direction at intervals. The Nth layer of roaster plate is provided with a middle discharge hole, and the N+1th layer of roaster plate is provided with an end discharge hole, so that an S-shaped discharge channel is formed. When coal quality is improved, the heating furnace is preheated through the heating device, then a coal raw material is added from the feed inlet in the top of the heating furnace, the coal raw material gradually falls through the S-shaped discharge channel, the coal raw material makes contact with the heated roaster plates in the discharge process so as to be heated, and accordingly the coal quality is improved. Finally, raw gas and tar are obtained from the gas collecting port in the top of the heating furnace, and semi coke is obtained from the discharge opening in the bottom of the heating furnace.

Description

technical field [0001] The invention relates to a method for improving the quality of coal by using a multi-layer roasting furnace, belonging to the technical field of coal coking. 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 car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B49/22C10B57/00C10J3/48C10J3/82
Inventor 刘东远朱尉铭
Owner 刘东远
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