A Method for Improving Coke Discharging Condition of Dry Quenching Coke
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A technology of CDQ and condition, which is applied in the field of coking, can solve the problems of high coke discharge temperature, uneven coke discharge, small coke discharge amount, etc., to reduce the coke discharge temperature, improve the coke discharge amount, and improve the focus discontinuity effect
Active Publication Date: 2021-04-02
ANGANG STEEL CO LTD
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a method for improving coke discharge in CDQ, improve the coke discharge temperature in CDQ, small amount of coke discharge, and uneven discharge of coke, improve the dry quenching rate of CDQ, and stabilize CDQ Production
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Embodiment 1
[0019] A method for improving the CDQ coke discharge condition, the specific steps are as follows:
[0020] 1) When the pre-storage section pressure is -50Pa~50Pa, the rotation speed of the circulating fan is gradually increased from the initial 1000r / min to more than 1170r / min, and the circulating air volume reaches 210000m 3 / h, so that the air-to-material ratio is controlled at 1300m 3 / t;
[0021] 2) Reduce the opening of CDQ peripheral air duct to 30%-35%, and increase the opening of central air duct to 95%;
[0022] 3) The CDQ adopts short-term large-amplitude decoking regularly, and 40% amplitude coking for 5 minutes, so as to accelerate the running-in of the inner wall of the CDQ;
[0023] 4) The CDQ cooling section temperature detection higher temperature point corresponds to the lower CDQ adjustment rod gradually increases the depth of insertion into the CDQ oven, the insertion depth is 50mm, and slows down the coke feeding speed;
[0024] 5) Add gaskets at the re...
Embodiment 2
[0027] A method for improving the CDQ coke discharge condition, the specific steps are as follows:
[0028] 1) When the pressure in the pre-stored section is -50Pa~50Pa, the number of rotations of the circulating fan is gradually increased from the initial 1000r / min to more than 1170r / min, and the circulating air volume reaches 238000m 3 / h, so that the air-to-material ratio is controlled at 1480m 3 / t;
[0029] 2) Reduce the adjustment of the CDQ peripheral air duct opening to 35%, and increase the central air duct opening adjustment to 97%;
[0030] 3) The CDQ adopts short-term large-amplitude decoking regularly, and 40% amplitude coking for 5 minutes, so as to accelerate the running-in of the inner wall of the CDQ;
[0031] 4) The CDQ cooling section temperature detection higher temperature point corresponds to the lower CDQ adjustment rod gradually increases the depth of insertion into the CDQ oven, the insertion depth is 50mm, and slows down the coke feeding speed;
[...
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Abstract
The invention relates to a method for improving the discharging condition of coke dry quenching. The method is as below: 1) adjusting a number of revolutions of a circulating fan and controlling an air to material ratio when pressure of a pre-storage section is -50 Pa to 50 Pa; 2) adjusting opening degree of an air duct around coke dry quenching and opening degree of a center air duct to ensure that full-section air distribution of a cooling section meets the requirements of the air to material ratio; 3) adding a gasket at the rear of a vibrating feeder to increase a gap between vibrating feeder coils and increase a given amplitude discharging amount of the vibrating feeder; a dry quenching furnace adopts short-term large-amplitude discharging to accelerate internal wall running-in of thedry quenching furnace, and improve unevenness of discharging; 4) an insertion depth of a coke dry quenching adjustment rod below a high temperature point of the coke dry quenching cooling section temperature detection increases to slow a coke feed rate; and 5) when the gas temperature in a rotary sealing valve is greater than 130 DEG C, the top of the rotary sealing valve is opened by nitrogen topblowing to cool the inside of the rotary sealing valve. The method improves the cooling effect of coke in the dry quenching furnace and improves the uniformity of coke feeding. The vibrating feeder coke removal capacity is increased by 20% to 30%.
Description
technical field [0001] The invention relates to the technical field of coking, in particular to a method for improving the coke discharge condition of CDQ. Background technique [0002] Due to the original construction and subsequent wear and tear of the cooling section of the CDQ furnace, the inner diameter of the cooling section deviates, and the distribution of coke in the cooling section is uneven, which not only affects the coke discharge temperature, but also causes uneven temperatures at four points in the cooling section, resulting in uneven coke lowering , the amount of coke in the four points is small, and the amount of coke in the center is too much; the number of rotations of the circulating fan cannot be effectively increased, the temperature of the rotary sealing valve is too high, and the temperature of the coke discharge is too high; at the same time, the increase in the amplitude is not obvious, and the amount of coke discharge is insufficient, resulting in C...
Claims
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Application Information
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