Method and device of electrochemical descaling, corrosion inhibition, sterilization and algae removal for cooling circulating water

Abstract

The invention discloses a method and a device of electrochemical descaling, corrosion inhibition, sterilization and algae removal for cooling circulating water, which belong to the field of water treatment and energy saving and emission reduction. A group or multiple groups of cathode plates (11) and anode plates (12) are arranged in an electrochemical reaction chamber (8) of the device. When direct current is loaded, interfaces of the cathode plates and the anode plates are in electrochemical reaction, calcium ions, magnesium ions, ferrous ions, other metal ions, silicate, phosphate and the like in water are settled to form loose needle-like grained stone type mineral crystals. Reactive oxygen, free hydroxyls, ozone and the like are generated at the anode plates (12) to inactivate algae in water, and treated water mixed with the circulating water can keep certain inactivating and restraining functions on algae and bacteria. The device is provided with a residue hopper (15), and when polarities of the anode and the cathode are exchanged, limescale is removed, sinks down to the residue hopper (15) and discharged through a residue discharging pipe (13). When the device is mounted on a circulating water bypass, a compact iron oxide film layer is formed on the tube wall and device wall of a circulating system, so that corrosion is hindered.

Description

technical field [0001] The invention relates to the field of water treatment technology and energy saving and emission reduction, in particular to a method and device for electrochemical descaling, corrosion inhibition, sterilization and algae removal of cooling circulating water. Background technique [0002] Cooling circulating water is generally treated by chemical methods, that is, adding scale inhibitors, corrosion inhibitors, and bactericidal algicides to the circulating water, but scale inhibitors and corrosion inhibitors cannot reduce the concentration of Ca and Mg ions in the water, and the formation of scale is inevitable Once the scale is precipitated on the pipe wall and wall of the cooling circulating water system, it will not only greatly reduce the heat exchange efficiency of the cooling facility, but also cause corrosion under the scale, and the circulating water will pollute the environment when the circulating water is discharged; Bactericide and algicide C...

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Problems solved by technology

[0002] Cooling circulating water is generally treated by chemical methods, that is, adding scale inhibitors, corrosion inhibitors, and bactericidal algicides to the circulating water, but scale inhibitors and corrosion inhibitors cannot reduce the concentration of Ca and Mg ions in the water, and the formation of scale is inevitable Once the scale is precipitated on the pipe wall and wall of the cooling circulating water system, it will not only greatly reduce the heat exchange efficiency of the cooling facility, but also cause corrosion under the scale, and the circulating water will pollute the environment when the circulating water is discharged; Bactericide and algicide Corrosion to pipelines and heat exchange equipment

[0003] Others such as ultrasonic method, electronic descaling method, etc., can only change the crystal form of scale, but cannot reduce water hardness, have limited scale inhibition effect, and have no bactericidal and algae killing effect

Existing electrochemical cooling water treatment technologies such as sacrificial anode protection method and electrolysis method are limited to certain functions in scale removal, corrosion inhibition, sterilization and algae removal, and mostly use high-voltage direct current or alternating current for treatment, which consumes a lot of energy and runs at high cost

At present, there is no low-consumption method and device for cooling circulating water treatment that can simultaneously realize the functions of descaling, corrosion inhibition, and sterilization of algae.

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