Boiler Blog | Nationwide Boiler Inc.

Nationwide Boiler news and events, industry updates, technical resources and more. You hear it first on The Nationwide Boiler Blog!

Steam: An Essential Utility, and the Rental Boiler Industry

Rental boilers are often overlooked as a necessity for many processing industries. However, in the midst of a crisis, the need for steam becomes much more apparent to the public eye. In the latest podcast episode from Inside the Boiler Room, ABMA President Scott Lynch discusses the rental boiler industry with Larry Day, Nationwide Boiler's President & CEO. Larry shares his insights on the world of rental boilers, which has significant relevance during the COVID-19 crisis with boilers near capacity at many hospitals and food processing facilities.

Larry and Scott discuss an array of topics, including the importance of rental boilers in times of crisis. As Larry stated, "Anytime there is a natural disaster, rental boilers are looked at almost like generators or air compressors. Steam is a utility, and that's where it comes in as an emergency condition. [Many businesses] need that utility to keep running." 

A rental boiler can provide added capacity for increased production needs or it can temporarily replace an existing boiler to keep a plant running. Specific information about the process must be known for the supplier to accurately quote a rental boiler application. This includes:  

  •    (1) Boiler Size / Steam Capacity Requirement (typically in HP or lb/hr)
  •    (2) Operating Pressure
  •    (3) Saturated or Superheated Steam Need (if superheat, what temperature)
  •    (4) Fuel Requirement
  •    (5) Any Auxiliary Equipment Needs
  •    (6) Emissions Requirements

Listen to the podcast now to learn more about rental boiler basics, the evolution of the rental boiler industry, and potential challenges with different technology and maintenance of rental boiler systems. Also, be sure to check out the ABMA’s Guideline for Rental Boilers, developed by members of the ABMA Rental Boiler Group, including Nationwide Boiler Inc.  

  399 Hits
  0 Comment
399 Hits
0 Comment

National Board Shares Jurisdiction Regulatory Changes Due to COVID-19

Businesses across the globe are being affected by the current state of the COVID-19 pandemic. Today the National Board posted a supplement to NB-370, The National Board Synopsis of Boiler and Pressure Vessel Laws, Rules and Regulations, which contains temporary changes being made by individual National Board member jurisdictions.

The newly curated webpage provides important and up-to-date policies for installation and inservice inspections, for each jurisdiction that has implemented temporary changes. The database will be updated continually as the crisis evolves.

To learn about regulatory changes in your jurisdiction, visit the National Board website.
  346 Hits
  0 Comment
346 Hits
0 Comment

Boiler Basics 101: Deaerators & Feedwater Systems

Deaeration of boiler feed water is primarily known to remove dissolved oxygen from the water, however, there are four additional advantages of utilizing a deaerator: (1) carbon dioxide removal, (2) improved operation, (3) improved heat transfer, and (4) energy savings. In this month’s edition of Boiler Basics 101, we review the importance of including deaerators as part of your boiler plant.

Corrosion in boilers from dissolved gases leads to reduced heat transfer and efficiency losses. Both oxygen and carbon dioxide, if not removed from the water entering a boiler, will cause corrosion. Dissolved oxygen will attach to the metallic components of a steam system and form oxides, or rust, on boiler heat transfer surfaces. If carbon dioxide is present with the oxygen, the two gases together can be up to 40 percent more corrosive than if they were acting individually. Removing non-condensable gases and limiting or avoiding corrosion will greatly improve heat transfer.

Deaerators also serve the purpose of pre-heating the water before it enters the boiler. This process saves energy by recovering flash and exhaust steam from plant returns, energy that would normally be lost to the atmosphere, and utilizing it to pre-heat the feedwater. This recovered steam can account for 20 percent of the fuel typically required to provide heat for that process. Pre-heating the feedwater will also greatly reduce the chance of thermal shock caused by the expansion and contraction of heating surfaces and will ultimately improve the operation of your boiler.

Deaerators and atmospheric feedwater systems both have the same purpose and are made up of several individual devices including feed pumps, a corrosion resistant receiver tank, and a control panel. A deaerator does its job by mixing steam with soft water inside a pressurized tank, removing oxygen molecules which are then vented into the atmosphere. Atmospheric feedwater systems are non-pressurized and perform the same function while operating at a lower (atmospheric) pressure. A notable disadvantage of operating at a lower pressure is that a lesser amount of dissolved gases are removed. Although atmospheric systems are more cost effective, process requirements will dictate which system is ideal for your application.

Overall, if boiler feed water is not properly deaerated, corrosion will occur, and a boiler will operate less efficiently with a higher possibility of facing costly downtime and boiler repairs. Nationwide Boiler provides new deaerators and maintains a rental fleet of deaerating boiler feedwater systems for both low and high pressure applications. Our systems range in size for boilers 24,000 to 225,000 lb/hr, and are configured one of two ways: a skid-mounted deaerator with feed pump stand or complete mobile feedwater system including the deaerator, feed water pumps, water softener, and chemical feed system, all pre-piped and wired and installed inside of a trailer-mounted van.  

Be sure to check out our previous Boiler Basics 101 blogs and stay tuned for the next edition!

  578 Hits
  0 Comment
578 Hits
0 Comment

Boiler Basics 101: Burners

The burner is the key equipment component for combustion control systems, providing the heat required for a boiler to convert water into steam. Ideally, a burner should achieve the highest degree of combustion efficiency with the lowest possible excess air. In this month’s edition of Boiler Basics 101, we will discuss the importance of burners and how they fit into the overall picture within the boiler system.

An industrial burner provides a basic function with a simple concept: it mixes fuel and air together to create combustion. Burners can be fired on various types of fuel but the most common utilized are natural gas, oil, propane and coal. In recent years, facilities have moved away from the use of coal to a more efficient and cleaner fuel like natural gas.

Regardless of the type of fuel used, the burner must perform five functions:

  1. Deliver fuel to the combustion chamber
  2. Deliver air to the combustion chamber
  3. Mix the fuel and air
  4. Ignite and burn the mixture
  5. Remove the products of combustion

Complete combustion occurs when all combustible elements and compounds of the fuel are entirely oxidized. However, with complete combustion comes harmful byproducts of combustion, including NOx and CO.

The amount of NOx and CO generated depends greatly on the burner design as well as the fuel fired. Burners with uncontrolled NOx may produce 60 ppm or more. Low NOx burners are the current standard and typically produce NOx of 30 ppm. Ultra-low NOx designs have been developed but are limited to firing on natural gas or propane. These types of burners will reduce NOx emissions to as low as 5 ppm to meet strict environmental requirements that are now common in certain parts of the country. If further NOx reduction is required, Nationwide Boiler’s CataStak™ SCR system can be utilized in conjunction with a low NOx burner.

The right burner design, along with proper combustion controls, will maximize the efficiencies of your boiler system. And as a representative of Webster Combustion, Nationwide Boiler and Pacific Combustion Engineering can help in the proper selection of your new or retrofit burner.

Be sure to check out our next Boiler Basics 101 blog to continue learning about various boiler-related topics.

  1016 Hits
  0 Comment
1016 Hits
0 Comment