Central air conditioning or process equipment uses cooling tower to dissipate heat. Its principle is to use the heat exchange function of latent heat (water vapor evaporation) and sensible heat (temperature drop) generated by cooling loop water and external air to achieve the purpose of waste heat removal. However, the circulating cooling water is mostly from tap water, groundwater, soft water or reclaimed water. The water contains a lot of dissolved solids. As the make-up water enters the system, the cooling water will evaporate when it is used in the circulating system. The concentration ratio of dissolved solids in the water will gradually increase in the circulating process of the system, and the water temperature will also increase. The water quality will change correspondingly When the concentration of scale exceeds its solubility, the scale will be generated, and will gather and adsorb on the surface of the heat exchanger, resulting in the decrease of the effective heat exchange area, the reduction of the pipe diameter, and the gradual decrease or even blockage of the effective circulation of the cooling loop water, which not only affects the heat exchange efficiency, but also may cause the system abnormality, and even the unit shutdown. Therefore, if the system scale and dirt are not effectively treated, the heat exchange system will have scaling, corrosion, slime and microbial proliferation, which will cause energy consumption, capacity reduction and unit shutdown, and increase unnecessary waste of enterprise resources.

Therefore, how to effectively prevent and control the formation of scale in cooling loop water system has a great impact on the smoothness of central air conditioning and process equipment. A good treatment scheme can not only improve the use efficiency of the equipment, but also extend the service life of the equipment, which is also of great help to energy conservation, emission reduction and sustainable environmental protection.

It consists of two systems: the electronic control host and the scale suction device. The low-voltage and high-frequency current generated by the electronic control host is applied to the water through the scale absorber, and the negative potential small molecule reduced water is produced by electrolysis of large molecule water mass. High frequency electromagnetic field changes the physical structure and characteristics of water, thus blocking the structure of ions and rust of iron ions in water. At the same time, the needle crystal of calcium, magnesium and other scaling materials on the pipe wall is changed into granular crystal, the mutual adhesion and polymerization characteristics are destroyed, the crystal loses its original gravity, falls off from the surface of heat exchanger and flue in a short time, recovers to the free state, and is absorbed by the scale absorber, so as to achieve the purpose of scale removal and rust inhibition.

Scale absorption and scale prevention

The main control board sends out high-frequency low-voltage current, and generates low-voltage high-frequency wave 1000 times higher than that of the magnet type electromagnetic coil through the scale absorber, so as to decompose the water body and generate negative potential small molecules to reduce water, so as to achieve the purpose of changing the ions in the water. Under the action of high frequency electromagnetic field, the crystal structure of ions in water has changed. The size of calcium crystal is reduced from 150um to about 20um. Moreover, the surface of needle like structure becomes smooth and loses viscosity. It is not easy to adhere to or deposit on the metal wall. The outer net of the scale adsorber processed with special data will attract free ions in the water, and then crystallize on the surface of the outer net. After adsorption and removal of free ions in the water, the content of calcium and magnesium plasma in the cooling water can be greatly reduced.

Killing bacteria and algae

High frequency activation of water treatment destroys the biofilm in water and the enzymes that algae rely on to survive, so that fungi and algae can not survive, so as to achieve the function of sterilization and algae killing.

Anti rust and anti rust

The rust (Fe2O3, Fe3O4, Fe (OH) 2, etc.) on the circulating water system equipment are magnetic iron oxides. High frequency electromagnetic activated water treatment produces electrolysis in the scale absorption process of cooling tower. The reduction potential of water decreases continuously, forming low potential reduction active water, which has strong reduction effect on rust, and passivates the inner wall of steel pipe (produces black Fe3O4 protective film), so as to reduce the corrosion of steel pipe and play the role of rust inhibition and rust prevention.

■Application of high frequency electromagnetic activation in water treatment

Industrial and commercial loop cooling tower, boiler make-up water, plate heat exchange system and heat recovery system, central air conditioning loop water system, process cooling water It has the functions of scale removal, sterilization, algae removal and rust prevention, and achieves the goal of energy saving, environmental protection and zero sewage discharge.

Comparison of different water treatment schemes

Cleaner for titanium mesh of scale absorber

■Purpose: to remove the scale attached to the titanium mesh of scale absorber and the pipes of various equipment systems, such as cold and heat exchangers, condensers, coolers and water-cooled machinery, so as to restore the heat exchange efficiency of the system.

■Characteristics: this agent is a scale cleaning agent of organic acid (mild and safe acid) and inert agent. It has high safety and easy operation. It has excellent protection function for equipment components made of iron, copper and copper alloy. It has little corrosiveness to metal, especially it is not easy to cause hydrogen embrittlement of metal. The corrosion rate is very low. It can prevent pipeline damage caused by excessive pickling It has good permeability and solubility, and can thoroughly clean the carbonate and deposited impurities in the pipeline.

■Dosage: to clean the titanium mesh of the scale aspirator, please pour this agent into the water tank of the plastic bucket to be cleaned, put the titanium mesh of the scale aspirator into operation, and the cleaning operation time is 2-4 hours.

Condenser local (side washing) cleaning: please pour this agent into the plastic tank to be cleaned, dilute it with 10-20% of the total amount of water, and recycle for 2-4 hours.

※The above value is the reference dosage, and the dosage will be increased or decreased depending on the thickness of scale deposit on site.

Treatment agent for air conditioning sump (long term anti clogging ingot)

■Purpose: it is used in air-conditioning system, such as forced draft fan, air-conditioning box, refrigerator and freezer system. After long-time use, the condensed water often produces various mucous membrane forms of scaling due to the mixing and accumulation of dust and dirt and bacterial slime, resulting in the blockage of drainage hole and overflow of water collecting pan. This product can prevent the odor of aerobic and anaerobic bacteria, and avoid the blockage caused by microorganism breeding in condensate collecting tray.

■Characteristics: This product is a long-term slow dissolving anti clogging ingot, which can effectively prevent rust and slime caused by microorganisms due to metal corrosion from accumulating in the air-conditioning condensate water collecting pan. After drying for a long time, the drain hole will be blocked and the condensate water will overflow. The plug proof ingot can keep the drainage system unblocked and effectively inhibit the peculiar smell emitted by microorganism and bacteria breeding, and has the ability to eliminate Legionnaires' bacteria, and has the effect of plug proof, disinfection and sterilization, so as to improve the living air quality.

■Usage: it is placed in the middle of the water flow in the water collecting pan under the cold air exhaust condensate pipe, and the farthest (highest) distance in the water flow. Each anti clogging tablet can treat 1000 l-2000 l of organic colloidal slime, and replenish it every 3 months (please remove all sludge blocking substances in the drain pipe of condensate water collecting pan before use, and then place anti clogging ingot).