A kind of flushing emulsion for wet electrostatic precipitator and preparation method thereof

Abstract

The invention discloses a flushing emulsion for a wet type electric dust collector. The flushing emulsion comprises the following components in percentage by weight: 5-10% of a solvent, 1-2% of a surfactant, 0.5-0.8% of an additive, 1-3% of NaOH, and the balance deionized water. According to the flushing emulsion disclosed by the invention, selected materials are excellent, a scientific processing method is adopted, and the processed flushing emulsion can cooperatively remove SOX, soluble salts, Hg and the like in smoke gas, so that the comprehensive purifying capacity is improved; emulsion droplets have relatively great interfacial areas, so that the inter-phase contact area is increased, and the heat exchange process is strengthened; and meanwhile, a hybrid type surfactant is added into the emulsion, and the flushing emulsion is prepared in a high-temperature high-pressure environment, so that a gas-liquid mass transfer coefficient can be increased, and the dispersity and the activity of the emulsion are strengthened; obvious effect-raising action is achieved on the wet type electric dust collector while ash is conveniently flushed in a flushing process, so that deep purification can be realized more effectively; and the flushing emulsion has remarkable environmental benefits, economic benefits and social benefits.

Description

Technical field [0001] The invention belongs to the technical field of flushing emulsions, and particularly relates to a flushing emulsion used for improving the efficiency of a wet electric precipitator. Background technique [0002] In order to achieve "ultra-low emission" of flue gas pollutants, coal-fired power plants will choose to install a wet electrostatic precipitator as the terminal purification device. However, the effect of wet electrostatic precipitator on the removal of fine particles is not stable enough, and the flue gas after desulfurization generally contains soluble salts (fluoride, chloride, etc.), SO X , NO X Strong corrosive substances such as high corrosion strength, strong permeability and difficult to prevent low-temperature and high-humidity dilute acid corrosion conditions. The flue gas environment (low temperature, high humidity, etc.) after desulfurization further aggravates the corrosion conditions. When the temperature of the liquid is 40℃-80℃, it i...

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Problems solved by technology

[0004] The flushing water of the wet electrostatic precipitator is generally taken directly from the circulating industrial water of the power plant or connected through other water sources whose water quality is equal to the desulfurization process water. The flushing is mainly for dust removal or anti-corrosion. The purpose is relatively single, and the effect is not as expected.

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