Exhaust Heat Recovery Products

Cain Industries Boiler Economizers

Boiler Economizer Systems

Heat Transfer Systems for Boiler Exhaust Recovery
Cain Industries offers an extensive selection of boiler economizers specifically designed to recover BTU exiting the exhaust stack and transfer it back into a desired heat sink. Our broad line of economizers cover the spectrum of boiler sizes, ranging from very small hot water boilers with burner inputs of 200,000 BTU/hr to large boilers delivering steam at 250,000 lb/hr. Cain also produces boiler feedwater systems, condensate tank and pump systems, exclusive sootblower assemblies and unique modulating internal exhaust gas bypass systems.

Exhaust Applications
  • Steam Boilers
  • Hot Water Boilers
  • Hot Oil Heaters
  • Ovens and Dryers
  • Specific Combustion Sources
  Equipment Variety
  • Boiler Economizers
  • Sootblowers
  • Circulating System Components
  • Storage Tanks
  • Modulating Internal Exhaust Gas Bypass Assembly

System Function
Cain boiler economizers reduce energy cost by capturing valuable heat from boiler combustion exhaust that would typically escape up the stack and into the atmosphere. This recovered BTU is transferred back into heat sinks such as boiler feedwater, cold makeup water, process water, swimming pool water, glycol and thermal fluids. Combustion fuels include natural gas, propane, digester gas, diesel fuel and No. 2-6 fuel oil.

Proposal Considerations
Consider Cain for cylindrical or rectangular stack connections, large or small boilers, a particular pinch point requirement, stack or liquid temperature control, special heat sink requirements, special heat transfer metallurgy requirements, specific maintenance concerns, optional equipment requirements, installation space and weight concerns, and package system requirements.

Anticipated Results
  • Tremendous fuel savings typically pay for equipment and installation within 1 to 2 years of average use
  • Pollution reduction equivalent to lowered annual fuel usage
  • Longest heat exchanger life expectancy

Boiler Economizer Family
Click on a economizer series below for more information:

Online Resources
Cain Industries Boiler Economizer Systems PDF Brochure Boiler Economizer Systems (.pdf)
A PDF brochure of Cain Industries Boiler Economizer heat recovery systems that include models: RTR, FCR, B Series, EM, CXL and DXL.
Cain Industries Gas & Diesel Cogeneration Systems

Exhaust Heat Recovery for Gas & Diesel Engine Cogeneration (CHP) Systems

Heat Transfer Systems for Large to Small Industrial Engine Processes
Cain Industries manufactures heat recovery product lines for gas and diesel engines, gas turbines, and micro turbine generator retrofit applications. For these applications, we offer over 500 standard products to choose from and can typically provide a comprehensive analysis and quotation to fit your exact needs within 48 hours. Our equipment can be adapted and assembled to fit any application or complete installation.

Cogen Applications
  • Hospitals
  • Manufacturing Plants
  • Schools
  • Office Buildings
  • Shopping Malls
  • Drilling Platforms
  • Oil & Gas Plants
  • Marine
  Equipment Variety
  • Exhaust Steam Generators
  • Large Exhaust Recovery Silencers
  • Smaller Specialized Exhaust Recovery Silencers
  • Special Heat Transfer Configurations
  • Recirculating Engine Jacket Water Boilers

System Function
BTU is transferred from the exhaust stream to heat sinks such as water, glycol, therminol fluids, or steam production. Suitable fuel types for combustion sources include natural gas, propane, digester gas, diesel fuel and light to heavy fuel oils.

Proposal Considerations
  • Large or Irregular Exhaust Connections
  • High or Varying Exhaust Temperatures
  • Particular Pinch Point Requirements
  • Exhaust or Liquid Control
  • Special Heat Sink Requirements
  • Special Heat Transfer Metallurgy Requirements
  • Specific Maintenance Concerns
  • Optional Equipment Requirements
  • Installation Space and Weight Concerns
  • Package System Requirements
Anticipated Results
  • Tremendous fuel savings typically pay for equipment and installation within 1 to 3 years of average use.
  • Pollution reduction due to lowered annual fuel usage.
  • Lower exhaust temperatures and significantly reduced sound output levels (final sound attenuation is typically 15 - 25 dBA).

Gas & Diesel Cogeneration Family
Click on a cogen series below for more information:

Online Resources
Cain Industries Gas & Diesel Cogeneration Systems PDF Brochure Gas & Diesel Cogeneration Systems (.pdf)
A PDF brochure of Cain Industries Gas & Diesel Cogeneration heat recovery systems that include models: ESG1, HRSR, HRSA, UTR1 and UTR.
Cain Industries Fume Incineration Systems

Exhaust Heat Recovery for Fume Incinerators, Thermal Oxidizers, Catalytic Converters, Industrial Ovens, Kilns and Furnaces

Heat Transfer Systems for Industrial Combustion Processes
Selecting the appropriate heat exchanger or waste heat boiler for fume incineration and other industrial combustion processes involves much consideration. Important areas of concern are controlling/bypassing exhaust waste heat, optimizing heat transfer performance, steam operating pressures, equipment size, weight and installation. Cain Industries' industrial heat exchanger family is specifically designed to address these concerns and more with standard design features not found in conventional heat recovery equipment.

System Function
BTU is transferred from the exhaust of incinerators, thermal oxidizers, catalytic converters, boilers and hot oil heaters to heat sinks such as water, ethylene glycol, therminol fluids, or steam production. Suitable fuel types for combustion sources include natural gas, propane, digester gas, diesel fuel, and light to heavy fuel oils.

Anticipated Results
  • Tremendous fuel savings typically pay for equipment and installation within 1 to 3 years of average use.
  • Pollution reduction due to lowered fuel usage.
Industrial Combustion Applications

Industrial Heat Exchange Family
Click on a heat recovery series below for more information:

Online Resources
Steam Power by Cain Industries

Heat Recovery Steam Generators for Engines, Incinerators, Thermal Oxidizers and Catalytic Converters

Selecting the correct "Heat Recovery Steam Generator" (HRSG) for engine cogeneration (CHP) and other industrial waste heat systems involves much consideration. Important areas of focus are controlling/bypassing the exhaust heat, optimizing overall system performance, maintaining required operating pressures, the boiler size, weight and installation. Cain's HRSG families are specifically designed to address these concerns and more with standard design features not found in conventional waste heat boilers. Our equipment will adapt to any retrofit application or new installation. Contact our sales team to receive a comprehensive proposal and quotation engineered to meet your exact requirements (within 48 hours).

Cain HRSG vs. Conventional Firetube Boiler
  • Generates 99% Dry Steam
  • 5 to 10 Minute Startup to Full Output
  • 1/3 to 1/2 the Weight, Size and Footprint
  • Integrated Full Exhaust Modulating Bypass
  • "Explosion Proof" Heat Transfer Exchanger
  • High Circulating Flow Minimizes Scale Buildup
  • No Thermal Expansion Problems: Accepting Cold Water Boiler Feedwater
  • Lowest "Pinch Point" Provides Greater Thermal Efficiency
Anticipated Results
  • Tremendous fuel savings typically pay for installed equipment within 1 to 3 years of average use.
  • Pollution reduction due to lowered annual fuel usage.
  • Lower exhaust temperatures and significantly reduced sound output levels (final sound attenuation is typically 15 - 25 dBA).
Steam Applications
  • Hospitals
  • Manufacturing Plants
  • Schools
  • Office Buildings
  • Shopping Malls
  • Drilling Platforms
  • Oil & Gas Plants
  • Marine

Heat Recovery Steam Generator Family
Click on a steam generator series below for more information:

Online Resources
Cain Industries Industrial Spiral Finned Tubing

Industrial Spiral Finned Tubing

Maximize Heating & Cooling Surfaces
Cain Industries offers an extensive selection of boiler finned tubing. Its primary function is to maximize the amount of heating surface that can be utilized in a given volume of installation space. As an example when you compare the amount of heating surface within a lineal foot of a 1" OD bare tube to a lineal foot of a 1" OD tube with 6 fins per inch and .5" fin height, you increase the amount of heating surface by a factor of 12. This equates to 12 times more heating surface with a finned tube than a bare tube, per lineal foot. Or it could also be viewed as a finned tube one foot long, which provides the same amount of heating surface as a 12 foot long bare tube.

There are many different types and methods of fin to tube attachment. Cain Industries has accumulated years of experience in the field of waste heat recovery from our industrial combustion exhaust product lines. These product lines include boiler economizers, waste heat recovery silencers and packaged waste heat boilers... Which all utilize finned tubing under rigorous thermal load conditions.

We have determined which specific types of finned tubing can best withstand the extremes of temperature and environment in our customers' installations. As a result we have developed proprietary technology to produce a range of industrial grade products that meet the industry's stringent demands.

When you have a finned tube requirement, we will offer the best recommendation to suit your need at competitive pricing. We'll quote your specification or create a specification based on your exact needs. We can offer basic finned tubing in straight lengths or subassemblies, or a complete heat exchanger.

ASME Quality Control
ASME stamping is available to meet Sec.VIII Div.l ("U" symbol) and Sec.l ("S" symbol) and National Board Stamp.

Sample Designs
Cain Industries will provide prototype finned tubing or assemblies, when required, at a nominal cost.

Standard Finned Tubing Types Available (all are available for rapid quotation and delivery)
  • Stainless steel tube to aluminum fin with the AL-FUSE™ bonding method of fin tube attachment for temperatures to 750°F.
  • Stainless steel tube to stainless steel fin with Nickel Brazed/welded method of fin tube attachment for temperatures to 1,750°F.*
  • Stainless steel tube to carbon steel fin with Nickel Brazed/welded method of fin tube attachment for temperatures to 1,650°F.*
  • Carbon steel tube to carbon steel fin with Nickel Brazed/welded method of fin tube attachment for temperatures to 1,650°F.*
  • Copper or cupro nickel tube to copper fin with Nickel Brazed/welded method of fin tube attachment for temperatures to 1,750°F.*
* Nickel Clad Coating, up to 2 mil thickness, is available to provide extended corrosion protection.

AL-FUSE™ Spiral Finned Tubing

The AL-FUSE™ process bonds aluminum fin to stainless steel or aluminum tube and is available in a variety of tube sizes, fin spacings, heights, and tube and fin metal combinations.

The Exclusive AL-FUSE™ Bonding Process
Cain Industries' proprietary metal bonding process called AL-FUSE™ produces a permanent metallurgical bond between the dissimilar metals. One very popular type is aluminum fin bonded to stainless steel tube which assures the original performance at the rated capacity of the spiral finned surface during its lifetime.

Cain's proprietary process incorporates a liquid composition which, when subjected to heat, creates a reaction causing alloying of the metals. The result is an integral one-piece unit possessing maximum heat transfer capability and a protective coating offering high resistance to corrosion.

AL-FUSE™ Can Easily Bend and Twist In and Around Confined Spaces
The finned tubing can be twisted and bent into numerous shapes. By forming a tube length into a U-shape, circle, square, or serpentine configuration, limited space is utilized rather than being wasted. As fins are metallurgically bonded to tubes, expansion and contraction does not develop points of stress along the tube surface that can cause metal fatigue. And, unlike the "pinging" sounds created by the movement of fins which are mechanically bonded to tubes, expansion and contraction of the AL-FUSE™ tube is noiseless. Vibration and thermal shock will not cause separation of the fin and tube.

  • Highest Heat-Transfer Efficiency
  • Excellent Structural Formability
  • Rugged and Lightweight
  • Leakproof Reliability
  • High Corrosion Resistance

Typical Cooling Applications which Illustrate the Versatility of AL-FUSE™ Finned Tubing are:

Converter Cooler
With spiral finned tube across the face of the radiator, the engine powered fan cools the engine's jacket water as well as the circulated hot oil.

Custom Designed Radiator
Straight lengths of spiral finned tubing fitted into top and bottom tanks provide cooling for a closed system. Additional cooling is possible with a power-driven fan.

Air Compressor
Two short lengths of spiral finned tubing provide the surface required to cool compressor air.

Hydraulic Power Supply
Life of power source is lengthened by removing excess heat from hydraulic fluid used with machine tools. Hot fluid is cooled as it circulates through spiral finned tube placed in the path of the engine's combustion air supply.

Online Resources
Cain Industries Spiral Finned Tubing PDF Brochure Industrial Spiral Finned Tubing (.pdf)
A PDF brochure of Cain Industries spiral finned tubing for heat recovery in extreme temperatures.

Finned Tube Ordering
The following information is required to determine the proper finned tube solution for you:

What is flowing through the finned tube (i.e., air, water, glycol, therminol fluids, etc.)?

What is the maximum interior tube pressure and temperature?

What is flowing around the finned tube (i.e., ambient air, fan cooled, combustion exhaust, etc.)?

What is the maximum exterior finned tube temperature?

What tube diameter and thickness is required?

What tube construction material is required (i.e., 316 Stainless Steel, 304 Stainless Steel, Aluminum, Carbon Steel, Copper, etc.)?

What fin height is required?

What fin construction material is required (i.e., 316 Stainless Steel, 304 Stainless Steel, Aluminum, Carbon Steel, Copper, etc.)?