METHOD AND INTEGRAL SYSTEM FOR TREATING WATER FOR COOLING TOWERS AND PROCESSESS REQUIRING REMOVAL OF SILICA FROM THE WATER

Title:

METHOD AND INTEGRAL SYSTEM FOR TREATING WATER FOR COOLING TOWERS AND PROCESSESS REQUIRING REMOVAL OF SILICA FROM THE WATER

Document Type and Number:

WIPO Patent Application WO2007148954

Kind Code:

A8

Abstract:

The present invention relates to an integral system for treating the water for cooling towers and other processes such as reverse osmosis rejection, regeneration of the anionic units of demineralization systems, aircraft blue water and wastewater, in which it is desired to reduce and/or eliminate contaminants such as silica, total, of calcium and magnesium hardness, suspended solids, organic matter and microorganisms, heavy metals, detergents or arsenic, for obtaining a water quality that enables it to be reused in different industrial processes, generating savings in terms of water and chemicals. The system is characterized in that the water to be treated passes through an electrochemical cell with plates of aluminium, iron or some other metal, and, when an electric current is applied at an amperage that allows an optimum current density to yield the aluminium required to form a hydroxide of aluminium, iron or some other metal, which, when reacting with the contaminants present in the water to be treated, forms an iodine that is later separated out from the water, enabling the treated water to be reused by this system, by integrating the processes of filtration and ozonization it enables better water quality to be obtained for reuse in cooling towers, industrial processes, general services, irrigation of green areas or any other use. The technological innovation in the present invention is that it totally eliminates the silica present in industrial water, allowing reuse of this water in different processes owing to the quality obtained. In addition to reducing the calcium and magnesium hardness salt concentration, preventing the formation of encrustations and, in cooling-tower systems, making it possible to increase concentration cycles, thereby generating savings of water and chemicals, it reduces microbiological proliferation, which will enable industry in general to replace conventional industrial water-treatment programmes with this new technological alternative. The advantages and benefits of the present invention are that it allows reuse and recycling of 100% of the water that has to be discarded in cooling towers, reverse osmosis rejection, regeneration of the anionic units of demineralization systems and wastewater from industry, generating financial savings by allowing reuse of the water that it is currently necessary to discard, thereby reducing the quantity of required chemicals essential for cooling towers and wastewater, reducing the impact on the environment caused by water being discarded with a contaminants and chemicals content that makes it impossible for it to be reused. Furthermore, it allows the elimination of the contaminants present in the water from wells that contain contaminants such as arsenic, cyanide, iron, manganese and microorganisms, enabling the water to be used for drinking.

JP2019042646	TREATMENT DEVICE AND TREATMENT METHOD OF SILICA-CONTAINING WATER
JP6750168	Etching waste liquid treatment system and etching waste liquid treatment method
JP6091031	A water treatment process and a water disposal system