What are industrial circulating cooling water treatment chemicals?

Industrial cooling water treatment chemicals are a class of chemicals specifically designed to improve and maintain the water quality of industrial circulating cooling water systems. These chemicals prevent scale formation, reduce corrosion, control microbial growth, and disperse suspended solids through a variety of mechanisms, thus ensuring the efficient operation of cooling water systems and extending the service life of equipment.

1. Main functions

1. Scale inhibitor:

• Role: Prevent hardness ions such as calcium and magnesium in water from forming scale on the surface of pipelines, heat exchangers and other equipment.
• Principle: prevent scale formation by forming stable complexes or lattice distortion with hardness ions.
• Common types: organic phosphonates (such as HEDP, ATMP), polycarboxylic acids (such as PAA, PMA), inorganic phosphates and so on.

Corrosion inhibitor:

• Role: Form a protective film on the metal surface to slow down the corrosion rate of the metal.
• Principle: by adsorption on the metal surface, forming a physical or chemical protective layer, isolating the corrosion medium.
• Common types: zinc salt, molybdate, nitrite, organic amines, etc..

Bactericide:

• Role: kill bacteria, algae and fungi in water to prevent microbial contamination.
• Principle: By destroying the cell structure or metabolic process of microorganisms, to achieve bactericidal effect.
• Common types: sodium hypochlorite, chlorine dioxide, isothiazolinone, bromide and so on.

Dispersant:

• Role: dispersing suspended matter and tiny particles in water, preventing them from being deposited on the surface of equipment.
• Principle: through electrostatic repulsion or space resistance effect, keep the particles in suspension.
• Common types: polyacrylic acid, polymaleic anhydride, polyaspartic acid and so on.

pH adjusting agent:

• Role: Adjust the pH value of water, maintain it in a suitable range and prevent acidic or alkaline corrosion.
• Principle: Adjust the pH of water by adding acid or alkali.
• Common types: sodium hydroxide, sulfuric acid, hydrochloric acid, etc.

Antifoamer:

• Function: Eliminate air bubbles in water and prevent foam from affecting the system.
• Principle: By lowering the surface tension of the liquid, the bubbles will be ruptured.
• Common types: silicone oil, polyether, etc.

2. Application Scenario

Industrial circulating cooling water system is widely used in many industries, including but not limited to:

• Power industry: cooling towers and condensers in power plants.
• Chemical industry: reactors and heat exchangers in chemical plants.
• Metallurgical industry: cooling systems in steel mills.
• Petroleum industry: cooling towers and heat exchangers in refineries.
• Air-conditioning system: central air-conditioning system for large commercial buildings and industrial facilities.

3. Usage

1. Dosage control: According to the specific application and water quality, determine the appropriate amount to add. Typically, the amount of agent added is 1-100 ppm of the volume of circulating cooling water.
2. Dosing method: the agent can be added directly to the circulating cooling water system through a metering pump, or through a mixer and water mixing and then added.
3. Regular monitoring: regularly monitor the water quality and equipment conditions, and adjust the amount of chemicals added according to the actual situation.

4. Cautions

1. Compatibility: Before adding the chemicals to the circulating cooling water system, make sure it is compatible with other water treatment chemicals to avoid unnecessary chemical reactions.
2. Dosage control: the correct dosage is to ensure that the agent to play the best effect of the key, too much or too little will affect the treatment effect.
3. Safety: Safety procedures should be followed during storage and use, avoiding direct contact with skin and eyes and taking appropriate protective measures.

Conclusion

Industrial circulating cooling water treatment chemicals play an important role in maintaining the efficient operation of the cooling water system and extending the service life of the equipment. Through the rational selection and use of these agents, the reliability and economy of the system can be significantly improved. If you need more detailed technical support or consultation, we recommend contacting a professional chemical supplier.

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