Automatic control method for air current classifying and conditioning technique of coal

A kind of airflow classification and technical technology, which is applied in the direction of furnace safety device, petroleum industry, coke oven, etc., can solve the problems of low automation level, and achieve the effect of speed coordination and suction stability

Inactive Publication Date: 2008-06-04
SHANDONG IRON & STEEL CO LTD
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  • Automatic control method for air current classifying and conditioning technique of coal
  • Automatic control method for air current classifying and conditioning technique of coal
  • Automatic control method for air current classifying and conditioning technique of coal

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Embodiment Construction

[0022] As shown in Figure 1, the coke oven flue exhaust gas (about 230°C) is led out from the bottom of the 3# and 4# coke oven main flue through their respective exhaust gas induced draft fans (1# fan 1, 2# fan 2) and then distributed through the pipeline. Two paths are blown into the lower part of both sides of the fluidized bed equipment, and a total of 6 branch pipes (3 on each side) of the two paths enter the fluidized bed 3, pass through the sieve plate, and fully contact with the raw coal to evaporate the water in the coal to achieve the regulation. wet purpose. This process requires the flue suction of each coke oven to be stable, and the pressure behind the fan is stable, so as to ensure that the gas pressure entering the fluidized bed is stable. The exhaust gas from the top of the fluidized bed is drawn into the multi-pipe dust collector 5 and the bag filter 6 by the dust removal fan 4 (also known as the process dust removal fan). ℃) is drawn out through the circula...

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Abstract

The invention discloses an automatic control method for coal airflow classification and moisture control technology and belongs to the coking industry coal pretreatment automatic control field. The invention integrates frequency conversion technology, network technology, computer technology and control technology into a whole, ensures the movement and fluidization effect of the raw material coal, can control the fluidization time and the dry classification effect, and realizes that three functions-drying, classification and preheating of the mixed coal for coking are integrated into a whole. The technology realizes full-automatic operation of the whole process system flow by flexible and perfect control, and is applied to the control of the coal pretreatment system in the coking industry.

Description

technical field [0001] The invention relates to a continuous and stable control method for the heat source, power and coal material transportation of the coal airflow classification and humidity control system of a coal pretreatment device in the coking industry. Background technique [0002] The technologies related to the coking coal graded humidity control technology mainly include: the pneumatic selective crushing process developed by the former Soviet Union and the coal humidity control process developed by Nippon Steel in Japan with coke oven flue gas. The above two technologies were researched and developed by the former Soviet Union and Japan in the 1970s and 1980s, and domestic experimental and theoretical researches began after the 1990s. [0003] In the traditional coal preparation process, 100% of the mixed coal is crushed through the pulverizer at one time. This results in components that do not need to be crushed, such as soft particles, being crushed, resultin...

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Application Information

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IPC IPC(8): C10B41/00
Inventor 温燕明耿晓宁范昆姬厚华谢淑霞范者峰张成雷崔雪梅包敦武
Owner SHANDONG IRON & STEEL CO LTD
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