Starting method of activated coke dry adsorption purification device

Abstract

The invention relates to a starting method of an activated coke dry adsorption purification device, which comprises the following steps: (1) introducing air into an activated coke adsorption tower filled with fresh activated coke to passivate the fresh activated coke; (2) enabling nitrogen to enter an active coke adsorption tower to displace at least part of air; and (3) introducing to-be-purifiedflue gas into the activated coke adsorption tower, enabling the initial introduction amount of the to-be-purified flue gas not to exceed 80% of the designed load of the device, gradually increasing the introduction amount of the to-be-purified flue gas until the introduction amount of the to-be-purified flue gas reaches 100% of the designed load of the device, and enabling the activated coke dryadsorption purification device to operate normally. According to the start-up method disclosed by the invention, the activated coke is passivated by adopting air circulation before the flue gas is introduced; the adsorption activity is reduced, the overtemperature phenomenon of an active coke bed layer when smoke is introduced is avoided, the air passivation process of the active coke can be independently carried out in advance by an upstream system, the starting time of the device is shortened, and meanwhile, the safe and stable operation of the active coke adsorption tower is ensured.

Description

technical field [0001] The present disclosure relates to the technical field of activated coke dry method flue gas desulfurization technology, and in particular, relates to a start-up method of an activated coke dry method adsorption purification device. Background technique [0002] Activated coke dry purification technology began to be applied industrially in the 1980s. It has outstanding advantages such as high desulfurization efficiency, no water consumption for reaction, no waste water and residue discharge, and no equipment corrosion problems. With the increasing requirements of environmental protection, this technology has attracted more and more attention and has been widely used. Applying activated coke dry purification technology to catalytic cracking unit can effectively remove SO in regeneration flue gas 2 / SO 3 , while for NO x , particles and VOCs also have a synergistic removal effect, combined with the upstream SCR and downstream bag filter, the entire pur...

AI Technical Summary

Problems solved by technology

When the existing active coke dry purification device is started for the first time, the amount of flue gas introduced initially is only 40-50% of the design load, and the temperature of the flue gas is controlled not to exceed 120°C. After the activated coke adsorption tower is operated for 7-8 days, the adsorption activity will be corresponding After the reduction, gradually increase the flue gas volume to the normal design load. The whole start-up process is relatively long, usually 7-10 days, which brings some inconvenience to the timely commissioning of the device.

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