Thermal technologies for industrial process heat

The Callens Group develops and integrates thermal technologies for industrial process heat across a wide range of sectors. As an EPCS integrator, we design, build and maintain complete heat installations: from steam boilers to industrial heat pumps and hybrid systems.

To do so, we don’t start from a particular technology, but from your specific situation. That way, you always get the thermal technologies that best combine efficiency, flexibility, operational reliability and sustainability.

Discuss your heat demand

Process heat tailored to your operational context

What is the most optimal thermal technology? That very much depends on operational factors such as

  • required temperature
  • pressures
  • flow rates
  • production continuity

Fluctuating energy prices and stricter emission targets also factor into the choice.

At the Callens Group, we start from your operational context to create the heat solution that offers the best balance between energy efficiency, operational reliability and sustainability.

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Typical challenges the Callens Group takes account of

  • Rising energy prices and pressure on operational efficiency.
  • Stricter CO2 and NOX targets stemming from regulations and your own sustainability strategy.
  • Reducing the risk of production downtime caused by malfunctions in your thermal installations.
  • Limited in-house capacity or expertise to manage complex thermal systems.
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Which thermal technology suits your process?

Not every industrial application calls for the same form of heat. Some processes need high temperatures, while others run perfectly well on low to medium temperatures.

The right industrial thermal technology depends on more than just the required power. The heat transfer medium, desired pressure, usage profile, capacity and available space will also have a major influence on the choice of installation.

That is why our engineers always analyze the local conditions of your production environment.

Your situation or heat demandPossible thermal technologyPossible energy sourceWhen is this worthwhile?
You need steam for production, cleaning, sterilization, drying or process heatingSteam boilerNatural gas, biogas, hydrogen, syngas, electricity, dual fuel, exhaust gases or waste heatFor processes that use steam, constant pressure, peak demand or high availability
You need high process temperatures without high system pressureThermal oil boilerNatural gas, biogas, hydrogen, syngas, electricity, liquid waste streams or dual fuelFor processes where temperature stability and high temperatures are important
You need heat via hot water or industrial central heatingHot water or industrial central heating boilerNatural gas, biogas, hydrogen, syngas, electricity, a hybrid set-up or dual fuelFor process heating, building heating, production areas or supporting utilities
You want to treat odors, VOCs, vapors or process emissionsThermal oxidationNatural gas, biogas, electricity, waste heat or recovered heatFor emission streams that require thermal or catalytic treatment
You want to reuse waste heat or electrify heat processesIndustrial heat pumpElectricity combined with available waste heatWhen usable waste heat is available and the required temperature level is achievable
Solutions

Industrial thermal technologies for every heat demand

Based on a thorough analysis of your process parameters and the wider operational context, our engineers work out the most suitable heat solution. That can range from a traditional boiler installation to a hybrid energy system where several heat sources work in sync. This ensures you have an efficient, reliable and future-proof heat supply.

Steam boilers

A steam boiler for industrial processes, heating or driving machinery.

From electrode boilers and electric steam boilers, to hybrid steam boilers, (bio)gas-fired boilers and hydrogen-fired steam boilers.

Discover all steam boilers

Thermal oil boilers

A boiler installation that heats thermal oil to extremely high temperatures and circulates it as a heat carrier.

From electric and (bio)gas-fired boilers, to syngas and hydrogen-fired thermal oil boilers.

Discover all thermal oil boilers

Hot water & industrial central heating boilers

Heating systems designed to produce large volumes of water for industrial processes.

From electric, hybrid and (bio)gas-fired boilers, to syngas and hydrogen-fired industrial boilers.

Discover all boilers

Thermal oxidizers

Installations that thermally combust volatile organic compounds, odorous gases or process emissions at high temperatures.

Our thermal oxidizers focus on maximum recovery of the released heat for your production process.

Discover all thermal oxidizers

Industrial heat pumps

A system that upgrades waste heat from production processes to a suitable temperature level with considerably lower energy consumption than a classic boiler, and up to a 100 % reduction in CO2 emissions if green electricity is used.

Our range includes both open and closed heat pump systems. In the closed systems, we work with natural refrigerants or refrigerants with a low GWP. In the open systems, we compress residual vapors in one or more stages to the desired temperature level, otherwise known as Mechanical Vapor Recompression (MVR).

Discover all industrial heat pumps

Combined heat and power systems

A CHP unit simultaneously produces electricity and process heat from a single fuel stream. This significantly increases the overall energy efficiency of your site.

To build a powerful CHP unit, the Callens Group uses gas turbines.

Discover all CHP units

Which technology suits your production?

Tell us about your challenges and discover the ideal solution.

Ask the experts
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Rental boilers

Do you temporarily need extra thermal capacity to keep production running?

The Callens Group offers a wide range of rental boilers for industrial heat applications: from steam boilers and thermal oil boilers to industrial central heating boilers to get you up and running quickly. Available for short and long-term rental.

The rental installations are equipped with the best technologies available to ensure that they meet the strictest emission standards. What is more, we can even supply you with electric or hybrid versions.

Discover all rental boilers
Sustainability

Make use of waste heat and lower emissions

Bedrijven staan onder toenemende druk om hun CO2-uitstoot, NOX-emissies en energieverbruik te verminderen. En dat zonder in te boeten op bedrijfszekerheid en rendement.  

Via onze duurzaamheidsoplossingen ondersteunen we industriële bedrijven met elektrificatie, energierecuperatie, warmtekrachtkoppelingen, valorisatie van reststromen, rookgasbehandeling en andere technologieën. 

Read more about CO2-reduction

Reducing your CO2 emissions

Reducing your NOX emissions

Optimizing your energy efficiency

TURNKEY PROJECTS

What can you expect from the Callens Group?

With the Callens Group, you choose a partner that manages your entire heat project from A to Z. As an EPCS integrator, we combine engineering, procurement, construction and service under one roof. That translates into maximum peace of mind, efficient execution, reliable continuity, flexible solutions and a service that goes well beyond commissioning.

Complete peace of mind

You have a single point of contact during every project phase. That keeps things clear and reduces the need for coordination between different parties.

Efficiency

The phases of each project follow one another seamlessly. As a result, the lead time is reduced considerably: no waiting times between project phases, and no loss of information between different parties.

Continuity

Because the Callens Group knows your installation context inside out, maintenance, interventions and temporary solutions are arranged quickly. That way, you maximize the uptime of your processes.

Unique service

With a dedicated service team of 120 service and maintenance technicians, a fast response time and a broad range of spare parts, you enjoy maximum operational reliability, even in critical situations.

Technology-independent

At the Callens Group, we are not tied to a single manufacturer, brand or technology. That means we always start from real needs and objectives. Our engineers compare different technologies and energy carriers to design the best solution, both technically and economically.

Flexibility

Thanks to a pragmatic organization and short decision-making lines, we quickly and flexibly respond to change. A fixed contact person oversees your project phase by phase and keeps track of the big picture.

Our workflow

EPCS projects: from analysis to service

01 /6

On-site analysis

Every request starts with a thorough on-site analysis. We collect process data, take measurements and map out technical parameters such as energy consumption, grid capacity and heat demand. This lays a solid foundation for a solution that is tailored to your production environment.

02 /6

Design

Based on our analysis, we design the most effective heat solution. To do so, we take account of performance, energy efficiency, operational reliability, sustainability and future expansion possibilities.

03 /6

Detailed engineering

Once the design been approved, our engineers work out the technical details.

04 /6

Procurement

Thanks to our many years of experience and strong relationships with leading suppliers, we can select the right components and purchase them efficiently. That guarantees quality, reliability and a competitive project cost.

05 /6

Installation & testing

Specially trained people come on site for installation and testing. Where possible, we prepare components in one of our workshops to speed up start-up. Testing is strictly regulated to guarantee safety and required performance.

06 /6

Service & maintenance

Is your installation fully up and running? Congratulations! From here, the Callens Group’s service and maintenance team takes over. They monitor operation and make proactive adjustments. If urgent help is needed, you can count on a technician 24/7.

What is your challenge?

 We’ll find a solution. With more than 400 experts in-house, no question goes unanswered.

Challenge us

View our projects

All projects
Volvo
Thermal technology

Residual heat makes its way to the boiler room

Output2 x 12.5 MW
Operating conditions125 °C - 12 barg
<Digimax S500 / Kenox S500 / Digimax Cyber 530>
Thermal technology Hot water & industrial central heating boilers Gas-fired

Condensing central heating boilers keep transport tanks nice and clean

Output2 x 2,000 kW
Fuelnatural gas
Combustion efficiency106 %

Questions? We have the answers.

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