MQ energy conservation and environmental protection system is applied to metallurgical cement power petrochemical industrial area, such as coal mining, the main business include: environmental protection equipment general contracting of converter dry dedusting method (LT) converter wet precipitation (3 generation OG method and new OG method) dry blast furnace dust at the top of the vibration of electrostatic precipitator pulse bag filter wet electrostatic precipitator dry fog dust suppression evaporative cooler (quench tower) and flue gas desulfurization denitration, etc