What do Controllers do?
Measure Parameters of industrial processes
- Cooling towers
- Other Processes
- 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?
- 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)
- 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.
- 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 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.
- 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:
- Sodium Hypochlorite
- Hydrogen Peroxide
Commonly used reducers:
- Sodium Bisulfite
- Sulfur Dioxide
- Ferrous Sulfate
Typically oxidizers and reducers are added to processes such as:
- Water Disinfection
- Cyanide destruction
- Chrome Reduction
- Metal Etching
- PTSA is p-Toluenesulfonic acid
- Uses traceable additive for chemical dosing
- Exhibits response to UV excitation
- 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
- The sensor is equipped with different metal tips to gauge the corrosion rates, similar to the Corrosion Coupon Racks.
- Common metal tips
- Mild steel
- 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:
Swimming Pool Water Treatment
RO/Desalination Water Treatment
Residential Potable Water
Municipal Waste Water
Municipal Potable Water
Industrial Water Treatment
Food & Beverage Disinfection/Sanitation
Cooling Tower Water Treatment
Boiler Water Treatment