Intelligent demercuration addition agent adding system for coal-fired power plant

Abstract

The invention discloses an intelligent demercuration addition agent adding system for a coal-fired power plant. The intelligent demercuration addition agent adding system comprises a smoke mercury continuous on-line monitoring plant, a crushing device, a screw feeder, a circulating flue, a fan and an intelligent control device, wherein a smoke outlet of the circulating flue is formed in the outlet of an economizer in a tail flue, and a smoke inlet of the circulating flue is formed in the inlet of an air preheater in the tail flue; the fan is arranged in the circulating flue, a feeding port of the screw feeder is communicated with a discharge port of the crushing device, the discharge port of the screw feeder leads to the circulating flue, and a monitoring probe of the smoke mercury continuous on-line monitoring plant is arranged in the tail flue; and the smoke mercury continuous on-line monitoring device and the screw feeder are respectively and electrically connected with corresponding ports of the intelligent control device. The intelligent demercuration addition agent adding system provided by the invention has the characteristics that additive amount of a demercuration addition agent is exact, the utilization efficiency is high and a demercuration effect is good.

Description

technical field [0001] The invention relates to a flue gas mercury removal device, in particular to an intelligent addition system for mercury removal additives used in coal-fired power stations. Background technique [0002] Mercury emitted from coal combustion is the main source of mercury pollution in the atmosphere. Mercury in the atmosphere can enter the human body through the respiratory tract or the food chain, endangering human health. Such as figure 1 As shown, the flue gas produced by the boiler furnace 1 in the existing coal-fired power station is discharged from the chimney 11 through the tail flue, and the tail flue is sequentially equipped with an economizer 2, an air preheater 8, an electrostatic precipitator 9 and a wet process Desulfurization tower 10. According to the research of Wang Qichao et al., the average mercury content in coal in my country is 0.22 mg / kg. The annual coal consumption in the country is estimated to be about 1.4 billion tons in 2010,...

AI Technical Summary

Problems solved by technology

Most of the traditional adding devices control the amount of additives added by the amount of coal fed, but for mercury removal devices, the added amount is not only affected by the amount of coal fed, but also affected by the mercury concentration of the coal, and the addition of additives is only controlled by the amount of coal fed The amount can not achieve the ideal addition effect

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