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Method and device for drying coking coal in coking industry

A drying method and coking coal technology, applied in coking ovens, petroleum industry, heating devices, etc., can solve the problems of power consumption reduction, achieve the effects of reducing dust, reducing load, and reducing costs

Active Publication Date: 2016-12-14
迁安市九江煤炭储运有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the fluidized bed humidity control process, this process effectively overcomes the problem of over-drying fine powder, creates conditions for low-moisture drying, greatly reduces power consumption, and overcomes the severe dust caused by fluidized bed winnowing Dust removal problem; compared with the rotary tube coal humidity control method, this process effectively overcomes the problem of equipment wear, multi-effect indirect drying greatly saves energy, and provides technical means for solving technical and economic problems in this field

Method used

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  • Method and device for drying coking coal in coking industry
  • Method and device for drying coking coal in coking industry
  • Method and device for drying coking coal in coking industry

Examples

Experimental program
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Effect test

Embodiment 1

[0037] This embodiment is a multi-effect drying scheme for coking coal classification, such as figure 2 shown. The coking coal raw material 16 first enters the pre-dryer 17 for pre-drying. After the coking coal raw material no longer sticks to each other, it enters the vibrating screening sieve 18 from the coal inlet of the screening sieve. The vibrating screening sieve inlet is above the screening sieve. Coal raw material enters from above and rolls down along the inclined screen screen. At the same time, the screen vibrates up and down under the action of the vibrating power mechanism. The upper part of the net rolls along the sieving wire mesh to the coarse particle outlet of the sieving sieve at the bottom, and enters the coarse particle dryer 20 of the moving bed drying system for drying. The fine particle component 21 with a particle size of less than 0.3 mm passes through the screen and falls to the lower part of the screen, leaves the screen 18 from the fine particle...

Embodiment 2

[0043] The coking coal drying scheme of the present embodiment is as follows: image 3 As shown, the coking coal raw material 16 first enters the pre-dryer 17 for pre-drying. After the coking coal raw material no longer sticks to each other, it enters the screening sieve 18 (using a rolling sieve) from the coal inlet of the screening sieve. Above the screening screen, the coking coal raw material enters from above and rolls down along the inclined screening wire mesh. At the same time, under the action of the rolling power mechanism, the coarse particles 19 with a particle size greater than 0.3mm are screened by the screening wire. The net is trapped on the upper part of the net, and rolls along the screening wire mesh to the coarse particle outlet of the screening screen at the bottom, and enters the coarse particle dryer 20 of the moving bed drying system. Fine particles 21 with a particle size of less than 0.3 mm pass through the screen and fall to the lower part of the scr...

Embodiment 3

[0046] This example is basically the same as Example 1, except that the pre-drying process reduces the moisture content of the coal to less than 6%, and the classified fine powder granules are not dried after being granulated by mechanical pressure, but directly mixed with the dried coal. Coarse particles cooled to below 50°C are mixed and stored, and then enter the coking and coal charging process. When the moisture content of the coking coal raw material is low, the drying process can be paralleled, that is, the coal inlet of each effect dryer enters the coal material that has not been dried, and the coal material can be discharged after drying to complete the drying. This embodiment is suitable for coking coal raw materials with low water content, and the parallel operation of moving bed dryers also increases the drying efficiency and output of coal materials.

[0047]The moisture of the dried coarse particles is controlled below 2%, the moisture of the granulated fine powd...

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Abstract

The invention relates to a method and a device for drying coking coal in the coking industry. After a coking coal raw material is screened by utilizing a vibrating or rotary screening sieve, and graded indirect drying is performed by a moving bed dryer according to different granule sizes; a screening sieve grading device is arranged in front of the dryer device to achieve drying of coal granules with different granule sizes; fine granules are granulated to make the granule sizes larger or the fine granules are not dried, and coarse granules whose temperatures are reduced to below 70 DEG C after drying and the fine granules are stored separately and then mixed and charged into coal, so that dust pollution is significantly reduced; a moving bed drying system is a multi-effect dryer system, water vapor generated during front-effect drying enters a next-effect heating mechanism and is used as a heat source, so that the coal drying energy consumption is reduced; a heating tube nest, a heating jacket and a dryer cylinder are made of a non-metallic material, so that corrosion and scale formation are effectively controlled on the premise that the heat transfer efficiency is not changed; the method and the device have the characteristics of high coking coal quality, low investment cost, low power consumption, reliable humidity regulating effect, and effective control over the dust pollution.

Description

technical field [0001] The invention relates to a method and device for drying coking coal, in particular, after sieving coking coal raw materials by vibrating or rotating sieves, the moving bed drier is used for indirect multi-effect drying according to particle thickness, so as to realize low-moisture coking and reduce The energy consumption in the coking process, the heat energy consumption in the coal drying process, and the device for effectively controlling dust pollution belong to the fields of coking coal drying technology, energy conservation and environmental protection. Background technique [0002] During the coking process, the water brought in from the coking coal vaporizes into high-temperature water vapor, which is discharged with the raw gas and then condenses during the gas cooling process. Both vaporization and condensation require energy consumption, and in addition, vaporization will reduce the temperature of the carbonization chamber. Therefore, reducin...

Claims

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Application Information

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IPC IPC(8): C10B57/08C10B53/04C10B57/10F26B17/16F26B23/10F26B1/00
Inventor 张书廷宋欣楠
Owner 迁安市九江煤炭储运有限公司
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