Deaerator Design and Operation

  • 12 February 2019
  • Author: Chem-Aqua, Inc
  • Number of views: 2112
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Deaerator Design and Operation

A deaerator preheats boiler feedwater and removes dissolved gases, especially oxygen and carbon dioxide. These gases are undesirable because they cause corrosion and increase treatment chemical requirements. 

Deaerators operate based on the reduced solubility of dissolved gases as temperature increases. For example, the solubility of oxygen decreases from about five ppm at 150ºF to about two ppm at 190ºF. Virtually all the free carbon dioxide gas is removed by increasing the temperature to greater than 170ºF.

Filtration Options for Closed Loop Systems

How they Apply to Different Types of Closed Loop Filtration

  • 4 December 2018
  • Author: Chem-Aqua, Inc
  • Number of views: 2298
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Filtration Options for Closed Loop Systems

Closed loop systems, typically hot and cold water recirculating systems, are often ignored when it comes to water treatment programs. Not only should closed loops be chemically treated to control corrosion and microbiological growth, they should also include a side-stream filter to remove suspended solids. 

Even though closed loop systems are theoretically “closed,” suspended solids can still be introduced as a result of corrosion, new construction, new additions to older systems, leaks, and poor commissioning practices. Turbidity or discoloration can be one sign of suspended solids.

How To Prepare Your Cooling Towers for Winter

Take Precautions to Avoid Issues

  • 20 November 2018
  • Author: Chem-Aqua, Inc
  • Number of views: 1821
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How To Prepare Your Cooling Towers for Winter

With the cooler months upon us, it is important to prepare your cooling towers for freezing temperatures.  Even in extremely icy conditions, cooling towers can be operated successfully if proper precautions and protocols are followed.  A frozen cooling tower is a major issue for business operations as well as from a cost standpoint.  Now is the time to prepare for winter weather.

Combatting Corrosion with Chem-Aqua

Know What You're Looking At

  • 13 November 2018
  • Author: Chem-Aqua, Inc
  • Number of views: 882
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Combatting Corrosion with Chem-Aqua

Corrosion costs money.  In fact, water system corrosion costs an estimated $50+ billion annually in the United States alone.  System life, maintenance costs, production time, deposition, and efficiency are all negatively impacted by corrosion.

How to Prepare Your Boiler for an Inspection

A Step-by-Step Guide

  • 6 November 2018
  • Author: Chem-Aqua, Inc
  • Number of views: 1067
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How to Prepare Your Boiler for an Inspection

Periodic boiler inspections are necessary to ensure that all equipment and components are operating safely and properly. When removing a boiler from service, the proper procedures should be used to reduce thermal stress and prevent sludge from settling and “baking on” waterside surfaces.

If a boiler is cooled too rapidly or unevenly, the extreme expansion and contraction stress can cause leaks to develop on rolled tube ends as well as damage firebrick or refractory material. Rapid cooling and draining can also cause any suspended solids in the boiler water to form hard, difficult-to-remove deposits. These deposits not only reduce heat transfer efficiency but could also lead to a false interpretation of the treatment program results.

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