Flue gas repeated aeration desulfurization and denitrification system and control method thereof

Abstract

The invention discloses a flue gas repeated aeration desulfurization and denitrification system which comprises a tower body, a basic solution tank, a recycling tank, a smoke passage, a chimney, a monitoring device, an executive device, a computing control device and two aeration rooms, wherein each aeration room comprises an aeration tank and a spraying rack. The invention further discloses a fuzzy control method for the flue gas repeated aeration desulfurization and denitrification system. The fuzzy control method comprises the following steps: step 1, generating a fuzzy control model rule list; step 2, adjusting and controlling the liquid level height of alkali wastewater in the aeration tanks; step 3: adjusting and controlling the water flow of spraying passages. Through the utilization of the alkali wastewater to perform flue gas desulfurization and denitrification treatment, the cost of the flue gas desulfurization and denitrification in the prior art is reduced.

Description

technical field [0001] The invention relates to the field of coal-fired boiler flue gas treatment technology and automatic control, in particular to a flue gas multiple aeration desulfurization and denitrification system and a fuzzy control method. Background technique [0002] Coal is the main fuel for thermal power generation in my country. The sulfur oxides and nitrogen oxides produced in the coal combustion process have caused increasingly serious harm to the atmospheric environment in my country. The commonly used flue gas desulfurization method is the lime / limestone-gypsum wet method, which has relatively high efficiency. However, domestic research on this technology has not yet made a breakthrough. At present, the system is mainly imported from Japan, and 70% of small and medium-sized boiler enterprises in my country cannot afford the massive infrastructure investment and high operating costs of the commonly used desulfurization process. In addition, low-grade gypsum...

AI Technical Summary

Problems solved by technology

[0003] One of the objectives of the present invention is to provide a flue gas multiple aeration desulfurization and denitrification system, which uses the chemical reaction between alkaline wastewater and flue gas to remove high-valence nitrogen oxides and sulfur oxide pollutants in the flue gas, and Reduce the PH value of alkaline wastewater, aiming to solve the problem of high cost of existing flue gas desulfurization and denitrification and alkaline wastewater treatment

Images