Cooling Tower Water Treatment

Pulsafeeder manufacturer's solutions for pH neutralizer or adjustment, disinfection, fluoride and equipment upkeep.

What do Controllers do?

Measure Parameters of industrial processes
  • Cooling towers 
  • Boilers
  • Other Processes 
Control equipment
  • Metering pumps (chemical feed timers)
  • Solenoid Valves & motorized valves
Facilitate Data Acquisition
  • Download the measurements to a PC
     

Using MicroVision series of controllers, including our cloud connected MicroVision EX controller and PULSAtron pumps to increase energy efficiency, reduce water consumption, reduce manpower, and optimize chemical utilization by:

  • Controlling conductivity to prevent scaling 
  • Controlling pH by metering acids and caustics to maintain a pH range that prevents corrosion
  • Controlling ORP by metering bromine or chlorine to prevent biological growth and fouling
  • Controlling inhibitor levels by monitoring PTSA 
  • Controlling and monitoring corrosion rates using different metal tips like stainless steel, copper, etc. 
  • Metering inhibitors such as polyphosphates or molybdates to inhibit corrosion
  • Timed dispensing of biocides such as gluteraldehyde or isothiazilone to prevent biological growth and fouling

 

What do we measure?

Conductivity
  • The ability of a substance to conduct electric current.
  • The basic unit of measure is µS/cm
  • Also may be expressed as Total Dissolved Solids (TDS) 
Conductivity Control
  • As conductivity increases, potential for precipitation increases.
  • Scaling reduces system efficiency.
  • Conductivity control balances water use and system efficiency.
  • Conductivity is reduced by adding lower conductivity water to a system.
pH 
  • Scientific Definition - Negative Logarithm of hydrogen ion activity in moles per liter
  • Practical Definition - measures the effectiveness of acidity of an aqueous solution
  • pH is represented by a unitless scale of 0 – 14
  • Where 0 pH is acidic, 7 pH is neutral, and 14 is considered very alkaline or a strong base

     

pH control
  • pH imbalance accelerates corrosion.
  • pH imbalance reduces chemical effectiveness.
  • pH is controlled by adding (pumping) acid or a base into a system.
  • Water must be a certain pH to be discharged.
ORP 
  • Oxidation Reduction Potential or Redox
  • Measured in millivolts 
  • Typically used in conjunction with pH
  • Provides an indication of the solution’s ability to oxidize or reduce another material.
     

Commonly used oxidizers:    

  • Chlorine
  • Bromine
  • Ozone
  • Sodium Hypochlorite
  • Hydrogen Peroxide

 

Commonly used reducers:

  • Sodium Bisulfite
  • Sulfur Dioxide
  • Ferrous Sulfate

 

ORP Control

Typically oxidizers and reducers are added to processes such as:

  • Water Disinfection
  • Bleaching
  • Cyanide destruction
  • Chrome Reduction
  • Metal Etching
  • De-chlorination
PTSA
  • PTSA is p-Toluenesulfonic acid
  • Uses traceable additive for chemical dosing
  • Exhibits response to UV excitation
PTSA Control
  • Concentrations can be detected and tied to chemical control in a MicroVision EX using a 4-20mA loop and set point control for superior control and less chemical waste

 

Corrosion Sensor
  • The sensor is equipped with different metal tips to gauge the corrosion rates, similar to the Corrosion Coupon Racks. 
  • Common metal tips
  • Mild steel
  • Copper
  • Can also try other tips like stainless steel, aluminum, or brass. 

 

Corrosion Sensor Control
  • Corrosion sensors measure the corrosion rates that the cooling tower material will experience over a period of time.

     

 

What is a Cooling Tower
  • Open recirculating cooling water system used to extract heat from processes or equipment on premises. Examples include air conditioning chillers, industrial processes and related equipment. 
  • A large device, in the form of a tower-shaped building, in which warm water is cooled by evaporation caused by circulating currents of air 
  • A cooling system used in industry to cool hot water (by partial evaporation) before reusing it as a coolant

Common Products for Cooling Tower Water Treatment:

PULSAtron

Typical applications are acids, caustics, polymers, bleaches, pH control, solvents, dyes/ink, catalyst, cleaning agents, and much more.

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MicroVision

MicroVision is designed for cooling tower and boiler applications.

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MicroVision EX

The MicroVision EX is a microprocessor controller used in cooling tower applications.

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