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Moisture control grading system and moisture control grading method for materials

A grading system and material technology, applied in chemical instruments and methods, solid separation, petroleum industry, etc., can solve the problems of increased resistance and blockage of pipelines in the chemical production recovery system, and achieve the effect of wide selection

Active Publication Date: 2012-07-25
钢研晟华科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At the same time, due to the inevitable collision and wear of coking coal in the process of mining, crushing, transportation, storage and transshipment to produce pulverized coal, the increase in the proportion of pulverized coal in the coking production process will cause the entrainment of pulverized coal in the raw gas. , resulting in an increase in the resistance of the chemical recovery system, and even blockage of the pipeline in severe cases

Method used

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  • Moisture control grading system and moisture control grading method for materials
  • Moisture control grading system and moisture control grading method for materials
  • Moisture control grading system and moisture control grading method for materials

Examples

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Embodiment 1

[0056]The material (for example, pulverized coal) to be humidified is conveyed to the silo 1 of the multi-tube rotary drying device 31 through the belt conveyor 52, and then the material is passed through the exhaust air induced draft fan in the feeding system that can prevent the drying medium from entering the silo 1. 512 The coke oven flue gas (200-300° C.) introduced through the first air inlet 4 is contacted to dry the material. Since the rotary cylinder 6 of the rotary drying device 31 is at a certain angle to the horizontal direction, and under the rotation of the rotary cylinder 6 and the push of the exhaust gas from the coke oven flue, the material moves toward the cylinder discharge port 21 of the rotary drying device 31 flow. There is a scraper inside the rotary cylinder 6, and the material is continuously brought to the top of the rotary cylinder 6 during the downward movement, and falls to the bottom under the action of gravity. In addition, the drying medium (fo...

Embodiment 2

[0059] The material to be humidified (for example, pulverized coal, etc.) is transported to the silo 1 through the belt conveyor 52, enters the silo 1 of the feeding unit, and introduces high-temperature exhaust gas (for example, about 500° C.) through the first air inlet 4 . Drying the pulverized coal by the high-temperature waste gas may cause the water content in the pulverized coal to be too low, and when the oxygen content in the rotary cylinder 6 reaches a certain level, the fine pulverized coal may cause combustion or explosion. Therefore, in order to prevent combustion or explosion, a certain amount of inert gas (for example, nitrogen) is also introduced into the rotary cylinder 6 for adjustment. Cooling water can also be introduced from the second air inlet 15 to prevent the material in the rotary cylinder 6 from overheating if necessary.

[0060] By adjusting the flue gas flow rate, the pulverized coal dried by high-temperature flue gas in the rotary cylinder 6 meets...

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Abstract

The invention discloses a moisture control grading system and a moisture control grading method for materials, which are particularly suitable for coke and coal pretreatment processes in the coking industry. The method adopts a rotary drying unit to carry out drying, multiple layers of return pipes and scrapers are arranged in the rotary drying unit, and after being dried, materials enter a vibrating graded drying unit and are further dried and graded. The method can adopt single gas or liquid medium to carry out drying alone, and also can use two types of drying media to simultaneously dry the materials, and for overhigh-temperature drying media, inert gas can be filled to prevent the overdrying of pulverized coal; and in addition, the method also can grade the dried materials in order to prevent ultrafine-granularity materials from entering a coke oven to increase the amount of dust in the coke oven. The technical method has the advantages of high treatment capability, high applicability, abundant drying medium sources, adjustable drying degree and the like.

Description

technical field [0001] The present invention relates to a material (for example, coal or pulverized coal) humidity control and classification system and humidity control and classification method, in particular to a material humidity control and classification system and humidity control and classification method suitable for the coking coal process in the coking industry. Background technique [0002] Coal humidity control technology can reduce the water content of pulverized coal into the furnace, reduce fuel consumption in the coking process, increase coking output and improve coke quality. It is a new way to save energy and reduce emissions in the coking production process. my country has large reserves of coking coal, and its coke output ranks first in the world. However, the moisture content of coking coal is relatively high, and the energy consumption of the coking process is higher than the average level in foreign countries. In 2010, my country's coke output was 375...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/10B07B1/28
Inventor 郭玉华王海风王锋俞佳师学峰高建军徐洪军周和敏沈朋飞
Owner 钢研晟华科技股份有限公司