Fly ash chelating agent is a chemical agent used to treat fly ash in flue gas of thermal power plants, mainly composed of ethylene diamine tetraacetic acid (EDTA) and its sodium salt. Ethylenediaminetetraacetic acid (EDTA) is an organic acid with good chelation properties, which can form stable complexes with metal ions. It can convert heavy metal ions (such as mercury, cadmium, lead, etc.) in fly ash into insoluble precipitates, thereby achieving the goal of reducing heavy metal emissions.
In addition, other auxiliary agents such as alkaline substances, surfactants, emulsifiers, etc. are often used in the treatment process of fly ash to promote the reaction and accelerate the precipitation of precipitates. It should be noted that when using chelating agents to treat fly ash, it is necessary to strictly follow the instructions for the use of the agents and relevant environmental regulations, and pay attention to the safe operation of the agents.