The water supply for the Cooling Tower can come from many different sources of the factory: Industrial zone water supply, factory raw treatment water, soft water... However, whether these water sources are treated or not, Good quality or not, there are still minerals, dissolved and suspended solids with different content. Therefore, after operating the cooling tower for a while, there will be corrosion and scale on the radiator plate, tower wall, pipeline...:

- Water with suitable pH threshold for cooling system: Cooling tower: 7-9, Chiller: 8-10.5.

- Cooling tower is always happening  : corrosion, scale and microorganisms.

- Even if the supply water is good (with a suitable pH for the cooling system), but usually the cooling water is circulating water, which, depending on the system and cooling purpose, can adversely affect water quality.

- Check the quality of cooling water to assess the actual condition occurring in the tower.

The use of chemicals for cooling towers depends on many factors. However, using chemicals in combination with proper operation will contribute to reducing the risk of corrosion, scale and microorganisms in the system. Because the cooling purpose of the system is different.

- With an open cooling system, under the influence of the environment: light, temperature, humidity, creating good conditions for microorganisms, algae and algae to grow.

- With a closed cooling system (chiller) due to low temperature operation, little addition of water, so dissolved solids are less concentrated. Therefore the problem of scale is less of a concern than the problem of corrosion.

For effective control of feed water quality and the most appropriate and optimal chemical program, please contact us for advice and treatment solutions.

Contact :

An Thy Environment Technology Company Limited

Headquarters :  Trau Quy Warehouse, No. 18, Lane 263, Nguyen Duc Thuan, Gia Lam, Hanoi.
South:  Floor 5, No. 90-92 Dinh Tien Hoang, Da Kao Ward, District 1, Ho Chi Minh City
Website: www.anthy.vn
Email: tech.chemical@anthy.vn
Tel: 024.3201.8585
Mobile : 093 110 6865

When working, the cooling tower is in direct contact with the environment, dust, temperature, humidity, and light. These are the factors that cause problems in cooling towers.

The criteria of the supply water and the water in the system, if not treated according to standards and strictly controlled, will cause:

- Corrosive

- Scale

- Microorganism

- Reduced system life

- Increased maintenance and maintenance costs

- Interruption of the production process.

1. Corrosion of cooling tower system

The source of water used exists contaminants such as: dissolved CO2 (from the air, the decomposition reaction of animal carcasses – present in water by oxygen), organic acid vapors (hydrolysis and oxidation of amines). , the decomposition reaction of organic compounds). Or the situation of using incorrect dosage chemicals for the purpose of system maintenance, and the corrosive nature of the system when operating at high temperatures…No matter more or less, it is the cause. cause corrosion in our system. The control of cooling tower system corrosion is based on the following mechanisms:

- Passivation: The inhibitor will create a film on the metal surface

- Precipitation: The inhibitor reacts with divalent ions to form a protective film on the metal surface.

- Absorption: The inhibitor is easily absorbed on the metal surface

- Removal: Removes corrosive agents

2. Close scale in cooling system

The water entering the system, whether or not treated, carries a mineral residue or has not been completely removed during the pre-treatment process. At the same time, because most of the long-term accumulation process under high temperature and pressure, the accumulation of scale in the system will be a cause that significantly affects the working performance of the system. Scale control in cooling tower systems includes:

- Concentration factor control (system operating cycle)

- Install automatic or manual blowdown system

- Using chemicals: Dispersing scale, breaking crystal structure, preventing precipitation of scale,

3. Microbial growth in cooling tower systems

The existence of organic substances in water, temperature, humidity, pH... are ideal conditions for microorganisms to grow. To overcome we can use chemicals: Chemicals used include 2 types of oxidizing and non-oxidizing agents.

- Non-oxidizing substances will react with the cell membrane to form a membrane surrounding the cell, resulting in the cell membrane not being able to exchange substances with the environment and microorganisms to be destroyed quickly.

- The oxidizing agent will destroy microorganisms when in contact with the surface or microbial cells, disrupting the structure of the cell.

In addition to the above problems, there are many other problems in the cooling tower system, please come to us for free advice, support solutions.

Contact :

An Thy Environment Technology Company Limited

Headquarters :  Trau Quy Warehouse, No. 18, Lane 263, Nguyen Duc Thuan, Gia Lam, Hanoi.
South:  Floor 5, No. 90-92 Dinh Tien Hoang, Da Kao Ward, District 1, Ho Chi Minh City
Website: www.anthy.vn
Email: tech.chemical@anthy.vn
Tel: 024.3201.8585
Mobile : 093 110 6865

The growth and development of microorganismsin the cooling system will produce compounds that are corrosive to metal materials.

We need to know: It is not only water quality that cause corrosion-scale but bacteria inside the cooling tower system can also cause corrosion-scale for this system.

Microbiological Effects on Cooling Towers

The main common problems inside the cooling system include:

Corrosive
Dirty
Microbiology
Cooling towers always have “microorganisms” that increase the risk of “scales and corrosion:

Corrosive:
Some types of bacteria will produce corrosive inorganic and organic compounds, algae, and fungi produce corrosive oxygen, and they are also a symbiotic food source with bacteria, forming a microbiome. negative impact on the cooling tower.

Scales:
Algae, fungi adhere to the surface of the device, reduce the heat exchange capacity of the tower and  are a carpet for impurities to reside. After being killed, algae will fall out of the device into plaques, settle to the bottom of the device and create scale. They also cause pipeline blockage, disturbance of pump flow, leading to some measuring sensors on the system notifying accurate signals to the controller.

Cause disease:
Another very serious consequence is that these microorganisms cause diseases for employees who come into contact with and work with the system such as Legionella bacteria that cause very serious lung disease. Along with that are other respiratory and digestive diseases. In addition, they also cause unsightly area, unsafe when manipulating the tower.

Microorganisms in natural conditions at the cooling tower all grow strongly, especially when there are all favorable factors such as moisture, light, food...

Surely, when you have a cooling tower, you will have a lot of headaches to find a solution to thoroughly solve the microbiological problem, please come to us for a free consultation. We will come up with a solution for you.

Contact :

An Thy Environment Technology Company Limited

Headquarters : Trau Quy Warehouse, No. 18, Lane 263, Nguyen Duc Thuan, Gia Lam, Hanoi.
South:  Floor 5, No. 90-92 Dinh Tien Hoang, Da Kao Ward, District 1, Ho Chi Minh City
Website: www.anthy.vn
Email: tech.chemical@anthy.vn
Tel: 024.3201.8585
Mobile : 093 110 6865

When operating the Cooling and Boiler systems, we often encounter a phenomenon that makes us anxious and worried. That is, we analyze water parameters such as Conductivity or  TDS, pH is within control limits, but the water of the system is cloudy. Why so ?

​

We distinguish these parameters as follows:

TDS is the total dissolved solids present in water, they are in the ionic, molecular form that is invisible to the naked eye. Some of these dissolved solids will form scale and corrosion in the system as they increase in concentration and time. When they have not formed scale and corrosion, no water changes are detected in the system.
Turbidity of water is caused by suspended substances in water, microorganisms, dirt and products of corrosion that have occurred during operation. In addition, it is also possible that Cooling is located in a place contaminated with dust, the air causes dirt to enter the water source of the  cooling tower.
Therefore, the TDS at the time of measurement is within the limits, but the water can still be cloudy due to the above process.

Technical staff should check the system, blow down or periodically clean the system. Combined with water treatment is always within control limits to prevent the formation of scale and corrosion later.

An Thy recommends that you use a specialized chemical program to deal with corrosion, scale and microbiological or other problems arising in the system. Please contact An Thy for a free consultation and the best solution.

Contact :

An Thy Environment Technology Company Limited

Headquarters : Trau Quy Warehouse, No. 18, Lane 263, Nguyen Duc Thuan, Gia Lam, Hanoi.
South:  Floor 5, No. 90-92 Dinh Tien Hoang, Da Kao Ward, District 1, Ho Chi Minh City
Website: www.anthy.vn
Email: tech.chemical@anthy.vn
Tel: 024.3201.8585
Mobile : 093 110 6865