HCBBS Forum (English)
Submit Chemical Projects / Find Solutions
Amplify Your Requirements on a Broader Chemical Platform *Engineering · Technology · Equipment · Solutions*
Submit Request

Requirements for water quality in circulating cooling water and problems encountered during operation

2016-07-06View Original

Thread Content

In many industrial processes, water is one of the important raw materials used directly or indirectly, with a large amount of it being employed as a cooling medium. When choosing water as a cooling medium, it is necessary to ensure that it meets the following requirements: 1) The water temperature should be as low as possible; under the same equipment conditions, the lower the water temperature, the higher the daily production volume. At the same time, the lower the temperature of the cooling water, the less water is used accordingly. 2) Water quality to prevent scaling: In the use of cooling water, it is necessary to ensure that scale does not form on the heat transfer surfaces of the heat exchange equipment, so as not to affect its heat transfer efficiency. This is crucial for safe production in factories. Production experience shows that it is common for poor water quality to lead to scale formation, thereby affecting factory operations; therefore, it is very important to add scale inhibitors such as ATMP, HEDP, and DTPMPA to circulating cooling water. 3) Water quality has little effect on the corrosion of metal equipment. When using cooling water, it is desirable that no corrosion occur in the metal equipment; if corrosion is inevitable, it is better that its severity be as low as possible, so as to prevent heat transfer equipment from having its effective heat transfer area reduced rapidly due to corrosion or from becoming unusable prematurely. Corrosion inhibitors such as sodium DTPMP and other specialized inhibitors can also be added. 4) Water quality to prevent the growth of bacteria and algae: In cooling water systems, it is necessary to prevent microorganisms such as bacteria and algae from growing and multiplying in the water. This helps to avoid or reduce the formation of excessive sludge and dirt resulting from their proliferation, as excessive sludge and dirt can cause pipe blockages and corrosion. Adding bactericides, algaecides, and sludge removers to water will yield even better results. The problems that arise during the operation of circulating cooling water pose threats to such systems. As the cooling water is reused repeatedly, factors such as rising water temperature, changes in flow velocity, water evaporation, concentration of various inorganic ions and organic substances, as well as exposure of cooling towers and cold water tanks to sunlight, wind, rain, dust, and other debris outdoors, along with the design and materials of the equipment, can lead to three main types of damage: 1) severe scale formation, 2) equipment corrosion, and 3) excessive growth of bacteria, algae, and other microorganisms, which results in sludge buildup that can block pipes. These issues can threaten and disrupt the safe and continuous operation of factories, even leading to economic losses. Therefore, they cannot be ignored. During daily operations, it is necessary to choose an economical and effective water treatment solution along with appropriate chemicals to minimize costs while achieving the best possible results, thereby reducing or even eliminating these damages

Submit a Project

**Looking for Chemical Technology, Equipment & Solutions?** No Registration Required Broader Platform Exposure | Global Chemical Service Provider Connections

Submit Request — Free Consultation

Disclaimer

This is an automated machine translation of the original thread. Some technical terms may have inaccuracies; the original text shall prevail. Click "View Original" at the top right to access the source page, which supports IP-based automatic real-time language translation. Please watch out for contact details and sales inducements to prevent fraud. All content and translations are for reference only, representing solely the poster's personal views. For enquiries, email service@hcbbs.com.