Desulfurization specific defoaming agent by using wet flue gas desulfurization processing water as recycled water

Abstract

The invention discloses a desulfurization specific defoaming agent by using wet flue gas desulfurization processing water as recycled water, and belongs to the technical field of wet flue gas desulfurization. The defoaming agent is prepared from the following components in percentage by mass: 40-6- percent of methyl amylketone, 10-30 percent of cyclohexanone, 10-20 percent of sodium dodecyl benzene sulfonate, 8-15 percent of sodium cocoyl glutamate, 1-5 percent of hydroxyl-alkyl sodium sulfonate, 0.1-0.5 percent of polypropylene resin and 0.05-0.2 percent of sodium carboxymethylcellulose, totally 100 percent. Compared with the prior art, the defoaming agent is a high-efficiency nontoxic environment-friendly defoaming agent, is applicable to defoaming and foam inhibition of complicated ingredients in water aqueous solutions having relatively high content of heavy metals, COD, BOD, suspending substances and the like, and is especially applicable to defoaming in the field of recycled water application.

Description

technical field [0001] The invention belongs to the technical field of wet flue gas desulfurization, and in particular relates to a desulfurization special-purpose defoamer for urban reclaimed water used as process water of a wet flue gas desulfurization system. Background technique [0002] Limestone-gypsum wet flue gas desulfurization technology is more and more used in thermal power plants because of its high desulfurization efficiency. However, many impurity components in the absorption slurry will not only cause serious pollution to the environment, but also increase the surface tension of the slurry, which will easily cause foaming inside the absorption tower. Foam will cause the following adverse effects: 1) cause slurry overflow and pollute the environment; 2) booster fan blade damage, slurry pump failure; 3) hinder and interfere with the mass transfer process of the desulfurization tower absorbing slurry and flue gas; 4) can not be normal Discharging the gypsum pro...

AI Technical Summary

Problems solved by technology

Among the three necessary conditions, since the wet flue gas desulfurization system is equipped with necessary oxidation (aeration) fans, condition 2) cannot be eliminated, and condition 3) is also difficult to control or improve, so it should be eliminated or reduced from foaming Agents (or surface active substances) or conventional agents focus on one direction (air side, liquid side or foaming interface) for defoaming. Therefore, the initial defoaming performance is poor, the defoaming speed is slow, and the temperature resistance is also poor.

More importantly, the impurity components in reclaimed water are complex, so the application effect is poor

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