Chembond Ashland Water Technologies Limited

The water used for boilers usually contains various substances such as suspended solids, dissolved solids and gases. When used directly such raw water results in problems such as scale, corrosion, carryover, etc. in the boiler and accessory equipment. In low pressure boilers usually there are problems of hardness and silica scale and corrosion due to dissolved oxygen throughout the system and corrosion due to carbon-dioxide in the condensate line. In medium and high pressure boilers, metal oxides are deposited on the heating surface, corrosion of accessory and scale problem in the superheater and turbines, etc.

Deposits directly reduce heat transfer, causing higher fuel consumption, high metal temperatures and eventually failures. Corrosion not only results in failure at the point of attack, but also produces serious levels of metal oxide contamination, which in turn may cause deposits elsewhere. Carryover results in superheater turbine and condensate system deposits, corrosion and/or erosion problems.

Therefore the three main objectives of a boiler water treatment program are to:

• Prevent formation of deposits
• Reduce corrosion of metals
• Prevent boiler water carryover

Chlorine dioxide is ideal for industrial waters and as a disinfectant in drinking water.

Advantages of chlorine dioxide:

• The bactericidal efficiency of chlorine dioxide is independent of pH values between 4 and 10
• Chlorine dioxide is superior to chlorine in the destruction of spores, bacteria's, viruses and other pathogen organisms on lower dosage
• The required contact time for ClO2 is lower
• Chlorine dioxide has better solubility
• Chlorine dioxide does not react with NH3 or NH4+
• It destroys THM precursors and increases coagulation
• Chlorine dioxide is also effective at controlling algae, slime and biofilm found in cooling water, process water, and paper mill whitewater systems
• In potable water applications it is a proven technology for improving taste and removing odors, algae, decaying vegetation, odor-producing phenolic compounds, mercaptans, and disubstituted organic sulfides

Cooling water treatment programs are designed to achieve control of corrosion and scale as well as microbiological fouling and contamination in open re-circulating system, closed re-circulating system and in once through cooling system.

Corrosion and scale lead to:

• Leakage in exchangers
• Unscheduled shutdown
• Reduction in water flow
• Loss of production
• Poor heat transfer
• Reduction in plant load

Microbiological growth also leads to microbiological induced corrosion, damage to wooden parts of cooling tower.

Our wide arrays of products are designed to achieve the following:

• Controlled corrosion
• Enhanced equipment and pipeline life
• No microbiological fouling
• No shutdown/production losses
• Greater water conservation

In the area of waste water management, we possess a complete range of products at highly competitive prices and offer on-site technical service & trouble shooting capabilities. Our total treatment approach integrates chemical treatment, state-of-the-art feeding & control technology and a commitment to outstanding customer service.

Application:

Clarification-KEMFLOC, AMERFLOC, DREWFLOC CHARGEPAC and PERFORMAX polymers comprise a complete range of organic, inorganic & blended coagulants and high-performance flocculants, which improve clarification, thickening, flotation and dewatering operation efficiency.

De-emulsification-A broad line of emulsion breakers "break" emulsions into the oil, water and solids phases.

Foam Control-Drewplus foam control agents are used to suppress, eliminate, control or prevent foam.

Metals Precipitation-Amersep metals precipitants are organosulfur-based compounds that remove metals in solution by a metal-Amersep precipitant complex and quickly precipitate to form solutions. These products are often used with Charge Pac coagulants and/or Drewfloc flocculants.

Odor Control-Amerscent neutralizing agents and ENZYBATE odor control agents prevent odors at the plant site, downstream of the discharge point, and at the sludge landfill. Our patented GENEROX TM chlorine dioxide generator system is used for oxidation odor control.

Slop Oil Treatment/ Recovery-Our emulsion breakers, coagulants and flocculants are used to treat oily wastewater and oily skimming in refineries & petrochemical plants, automotive parts & appliance manufacturers, can-stamping plants, foundries, steel mills, aluminum casting plants and food processing plants.