Advanced Thermal Solutions:
The Precision of the Electric Immersion Heater

Electric Heater LLC provides high-performance thermal solutions for the most demanding industrial environments worldwide. Our engineering team focuses on delivering reliable equipment that enhances operational efficiency and ensures long-term durability. We specialize in custom designs that meet rigorous international safety and performance standards.

Understanding the Electric Immersion Heater

An electric immersion heater consists of a specialized heater bundle installed directly into tanks or pressure vessels. In these specific applications, there is typically very little flow across the heater bundle itself. Consequently, heat transfer occurs predominantly through natural conduction and convection.

Because this equipment has a lower heat transfer coefficient, engineers must carefully select an appropriate heat flux for each project. Selecting the correct heat flux keeps the bundle’s operating temperature within an acceptable, safe range. We typically see heat flux ratings ranging from 10 to 30 watts per square inch in these setups.

Common Applications for Immersion Technology

You will frequently find an electric immersion heater installed to raise the temperature of liquid in caustic tanks and bath heaters. In petrochemical complexes, these heaters are essential for vaporizing liquids within knock-out drums before they reach the flare tower. This method prevents liquids from reaching the flare, protecting the environment and equipment.

Similar technology is used in vaporizer systems that require lower heat flux for immersion service. If the system involves active flow, we can safely increase the unit’s heat flux. Furthermore, an electric immersion heater in a kettle-style reboiler typically operates with minimal flow across the heating elements.

Specialized Water and Salt Bath Heating

Water bath heaters often utilize a mixture of water and glycol as the primary heating media. Water has excellent heat transfer properties, enabling efficient operation even in stagnant immersion services. The heater sits at the bottom of the bath to provide consistent thermal energy to the process.

On the far extreme, we manufacture an electric immersion heater for molten salt applications in specialized industries. These projects involve melting the salt and raising its temperature once it becomes liquid. A very low heat flux is strictly required here to ensure a long and productive heater life.

Expertise as an Electric Process Heater Manufacturer

As a premier electric process heater manufacturer, we design systems where the process flows directly through the heater assembly. These units heat the process in single or multi-pass configurations, often utilizing higher heat flux ratings. Depending on the specific application, these ratings typically range from 10 to 30 watts per square inch.

One common use for this technology is heating natural gas, often called an electric fuel gas heater. These heaters raise the gas temperature above the dew point upstream of combustion gas turbine fuel lines. This prevents condensation and ensures the turbine operates with a clean, dry fuel source at all times.

Pressure Regulation and Petrochemical Processes

In gas transmission pipelines, gas temperature drops significantly due to the Joule-Thomson effect during pressure reduction. An electric preheater is employed to counteract this cooling effect and protect downstream equipment from freezing. Alternatively, a natural gas preheater may be used before the pressure regulation station to improve efficiency.

Our units are also found in petrochemical refineries, heating nitrogen and process gases for vital chemical reactions. These systems often operate at extremely high temperatures and benefit from our specialized stand-off housing designs. To maintain these complex systems, we also offer a comprehensive electric heater repair service for our global clients.

Custom Shell and Tube Exchangers

Shell-and-tube exchangers are similar in construction to electric heaters but function very differently in practice. These exchangers utilize hollow tubes with process flowing on both the inside and the outside of the bundle. Unlike an active electric heater, these units depend entirely on thermal gradients for effective heat transfer.

We manufacture custom, high-specification shell-and-tube exchangers tailored to your unique industrial requirements. Our Houston-based facility also produces ASME VIII U-stamp pressure vessels and filtration systems for liquid and solid separation. Please contact us today to discuss how our engineering expertise can support your next major project.

Partner with Experts for Your Custom Electric Immersion Heater

Are you looking for a partner that combines high-level engineering with fast and reliable turnaround times? Contact Electric Heater LLC today to work with us for your custom electric immersion heater or to learn more about our global manufacturing capabilities. Our application specialists are ready to help you find the perfect solution for your next industrial project.