A method for controlling smoke when CDQ is loaded

Abstract

A method for controlling smoke generation during dry quenching coke loading, comprising the following steps: 1) pre-storage chamber pressure setting: optimizing pre-stored chamber pressure setting value, adjusting from 0 to the range of 0 to -30 Pa; making the pre-stored chamber pressure to be within a controlled negative pressure range; 2) adjusting according to the pressure setting value, and increasing the opening degree by 15-35% on the basis of the original opening degree of a regulating value of the pre-storage chamber; 3) establishing an interlocking relationship between the pre-storagechamber pressure detecting and the coke loading operation and establishing interlocking between the pre-storage chamber pressure detecting and coke loading operation; 4) establishing an interlockingrelationship between the speed increase and reduction of a dust removal fan and the lifting and descending height of a crane; and 5) adjusting the height of a flue gas recovery cover above a flue gasdischarge port until the distance between the flue gas recovery cover and the flue gas discharge port is at least 80 cm. By the above method, the impact of red coke loaded to an air circulation systemof a dry quenching furnace, pressure balance and stability of the air circulation system are maintained, and flying dust and smoke can be more effectively prevented during the coke loading operation.

Description

technical field [0001] The invention relates to coke oven technology, in particular to a method for controlling smoke emission when CDQ coke is loaded, which is used for controlling smoke emission when red coke is loaded into the CDQ furnace, and promotes the improvement of the site environment. Background technique [0002] The pressure of the CDQ furnace pre-storage chamber is designed within a certain range, and the pressure detection device installed in the pre-storage chamber issues instructions through the pressure detection signal, and controls and regulates it through the pre-storage chamber regulating valve at the outlet of the circulating fan. [0003] The control of the existing technology is only to achieve the minimum loss of circulating air volume, to achieve the normal circulation and heat exchange of the gas in the circulating system, and at the same time to ensure that the thermal buoyancy generated by the red coke in the CDQ furnace will not spread to the fu...

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Problems solved by technology

[0003] The control of the existing technology is only to achieve the minimum loss of circulating air volume, to achieve the normal circulation and heat exchange of the gas in the circulation system, and at the same time to ensure that the thermal buoyancy generated by the red coke in the CDQ furnace will not spread to the furnace mouth, thereby avoiding the overheating of the equipment at the furnace mouth The purpose of damage, but there is no causal relationship between its pressure level and whether the crane can load coke

[0004] Field practice shows that when the air volume flow of the circulation system does not reach a balanced state, the pressure of the pre-storage chamber will deviate. One situation is that the pressure of the pre-storage chamber will rise. During the coke loading operation, the superposition of the additional heat energy attached to the newly loaded red coke and the heat energy accumulated in the red coke itself in the pre-storage room will generate higher positive pressure in the CDQ furnace, which often or inevitably causes dust and ash emission. Cause fugitive emissions and pollute the environment

For this abnormal situation, according to the existing control technology, it is impossible to avoid

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