System and method for optimizing ozone operation in coking flue gas desulfurization and denitrification process

Abstract

The invention discloses a system for optimizing ozone operation during a coking gas desulfurization and denitrification process, which comprises a working condition judgment system, a timing module, a process model module, and a decoupling and control module, wherein the working condition judgment system is used for determining the current production working condition according to real-time data during the desulfurization and denitrification process; the timing module is used for determining a commutation period according to the determined current production working condition; the process model module is used for determining a process model according to the determined current production working condition; and the decoupling and control module is used for carrying out decoupling and control on the denitrification process according to the commutation period and the process model, and thus, the ozone output amount during the denitrification process is fit to nitrogen oxide concentration changes in the gas, and the nitrogen oxide output concentration is ensured to be only influenced by the ozone output amount. The invention also discloses a method of optimizing the ozone operation during the coking gas desulfurization and denitrification process. Control on the denitrification process can be realized, the denitrification process is ensured to be strictly below the environmental protection requirements, and the ozone use amount and the operation cost are reduced maximally.

Description

technical field [0001] The invention relates to the field of denitrification and optimization control of coking flue gas, in particular to a system and method for optimizing ozone operation in the process of desulfurization and denitrification of coking flue gas. Background technique [0002] my country is the largest coking producer in the world. The new environmental protection law officially implemented on January 1, 2015 puts forward strict and clear quantitative requirements for the emission indicators of sulfur dioxide and nitrogen oxides in the coking chemical industry. The integrated process device of forced turbulent desulfurization and forced oxidized urea denitrification by wet ammonia method is an important means to treat coking industrial flue gas. [0003] Such as figure 1 As shown, the integrated process device includes an induced draft fan 301, a waste heat recovery boiler 302, a booster fan 303, a desulfurization tower 304, a denitrification tower 305, and ...

AI Technical Summary

Problems solved by technology

However, in the conventional control method at this stage, the ozone is always in the state of maximum power operation. Although the concentration of nitrogen oxides at the outlet is lower than the standard requirement, it causes a huge waste of energy, greatly increases the cost of the enterprise, and is not conducive to the optimal operation and technology of the device. popularization of

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