Desulfurization system for dry coke quenching device

Abstract

The invention discloses a desulfurization system for a dry coke quenching device. The desulfurization system comprises a dry quenching furnace, a gas collecting bag, a desulfurization unit and a chimney, wherein a dry quenching top common bleeder gas outlet, a dry quenching filling port dust removal gas outlet and a dry quenching coke outlet dust removal gas outlet of the dry quenching furnace arecommunicated with the gas inlet of the gas collecting bag; the gas outlet of the gas collecting bag is communicated with the gas inlet of the desulfurization unit; and the gas outlet of the desulfurization unit is communicated with the gas inlet of the chimney. Contamination gas discharged by the dry quenching furnace repeatedly is mixed by the gas collecting bag so as to stabilize the concentration of SO2, the fluctuation range is narrowed, the SO2 concentration of environmental dust removal gas and the gas amount are stabilized in a narrow range, the gas is supplied to the desulfurization unit for desulfurization, and selection and design for performing the subsequent desulfurization process according to the maximum values of the concentration and gas amount can be avoided. Therefore, waste of desulfurization capacity is avoided, and the energy consumption is saved.

Description

technical field [0001] The invention relates to the technical field of black smelting, in particular to a desulfurization system of a dry coke quenching device. Background technique [0002] The dedusting gas discharged from the CDQ device is mainly composed of three parts: (1) the exhaust gas commonly used at the top of the CDQ; (2) the dedusting gas at the coke outlet of the CDQ; . These three gases are combined by the fan and discharged from the same chimney. Due to the intermittence of coke loading, the amount of flue gas emitted is between 100,000 and 300,000 m 3 Fluctuates between / h, SO 2 The content is 180-650mg / Nm 3 Fluctuates between, so it cannot meet the SO requirements of GB16171-2012 2 Content less than 80mg / m 3 standard. [0003] Therefore, it is necessary to control the SO in the dedusting gas 2 Perform removal treatment. However, due to flue gas volume and SO 2 The content fluctuates within a relatively large range. If the subsequent desulfurizatio...

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Problems solved by technology

[0004] The present invention solves the technical problem of waste of desulfurization treatment capacity in the prior art by providing a desulfurization system for coke CDQ, and realizes the technical effect of saving energy consumption

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