CHILLER CHEMICAL

Why Are Chiller Chemicals Used?

Chiller chemicals are used to control corrosion and to prevent bacteria growth. The most common chiller corrosion chemical is a closed-loop nitrite, borate, and silicate product. The second chemical is a cooling water biocide. The most common biocide used to control bacteria is glutaraldehyde and isothiazolinone. If freezing is a concern, you may consider using a propylene glycol solution such as Defrost. Advanced chemicals and engineering will provide you with the best quality of Chiller chemicals.

How Do I Feed My Chiller Chemicals?

If you cannot manually dump the chemicals into a basin, chiller chemicals are either injected into the water system with a metering pump through an injector quill or it is slug feed with a chemical pot feeder.

How Often Should I Check The Chemicals In My Chiller?

Depending on how critical your system is, you may need to check it daily. On most very general water systems, once a week is good. Properly operating Chiller chemicals systems are tight and should not lose much water. If you are losing chemical, you are losing water. So if you are always adding chemicals, you need to check for water losses.

What Tests Need To Be Perform On A Chiller System?

Monitor the conductivity of the water and keep this for reference. Conductivity is and chemical usage is important when troubleshooting a system. Monitor the nitrite or based product used as a corrosion inhibitor and use dip-slides to monitor bacteria development.

Available Water Treatment Methods:

Although chemical dosing is the most widely used method, to make the chemical treatment effective, it is recommended that more than one of the following methods should be used simultaneously in order to obtain the maximum benefits:

1. Chemical treatment (or dosing): Proprietary or generic chemicals (like Sodium Silicate, Sodium Nitrite, and Sodium Sulfite) compositions are used to prevent the Chiller chemicals system from corrosion, scaling, fouling, and microbiological growth. How? Mainly in three ways: first, these chemicals react with the pipes to form a protective thin inside layer; second, the chemicals help in maintaining the pH level; and third, the chemicals remove corrosive dissolved oxygen in the water. Dosing pumps are used for applying the predetermined quantities of chemicals at regular intervals.
2. Mechanical Treatment: Before commissioning, the whole system should be cleaned and flushed using treated water and commission it as soon as possible. Attend all the leaking points regularly.
3. Filtration: The filter is used for removing (or at least reducing) the solid particles (like welding flush, concrete particles, etc.).
4. UV and Ozone treatment: This method is effective for preventing microbiological growth in the system, but is not used widely for Chiller chemicals unless there is some restriction for chemical treatment. Unlike chemical dosing, this treatment does not generate harmful chemical by-products.

Saving Costs With Chiller Water Treatment:

Chiller chemicals water treatments should be a must for most chiller plants… where the pipes are made up of low carbon steel and normal water is used as the make-up water. Statistics say that for a 1,000-ton chiller, a whopping $15,000 (approx.) saving on the energy bill is possible by opting for an appropriate water treatment program. I want to emphasize the words “ appropriate treatment” especially for the chemical dosing, because otherwise, the by-product from the chemical reactions can adverse the quality of the water. For example, the higher concentration (900-1200 PPM) of the Sodium Nitrite (NaNO2) increases the mechanical seal and valve corrosion.

SA – 140

Liquid - Corrosion Inhibitor Ecolab Pte Ltd, Singapore.

GENERAL DECRIPTION
SA – 140 is a corrosion inhibitor for chiller systems. It quickly neutralizes the corrosive action of carbon di-oxide and other acidic components in the chilled water. The product is based on organic ingredient. It is specially effective in complex system where cooling pressure may become quite low before final condensation is achieved.

CHEMICAL COMPOSITION

• 1. Appearance Green Liquid
• 2. P^h 11.0
• 3. Specific gravity 0.9 – 1.005

CHEMICAL COMPOSITION

• 1. Diethylene glycol 50%
• 2. ORGANIC CORRISION (CONTROLER) 10%
• 3. PRESERVATIVET 5%
• 4. INORGANIC COMPONENT 10%
• 5. ORGANIC IMPURTIES3%
• 6. INORGANIC IMPURITITY 2%
• 7. SODIUM NITRATE 15%
• 8. SODIUM PHOSPHATE 5%