In modern industry, steam generation plays a decisive role in ensuring production efficiency, energy savings, and environmental compliance. Among the various combustion technologies available today, CFBC boilers—short for Circulating Fluidized Bed Combustion boilers—have become an important solution for enterprises seeking both performance and sustainability.

The defining feature of CFBC boilers is their ability to burn a wide range of fuels with high efficiency and low emissions. Unlike conventional pulverized coal systems, the circulating fluidized bed operates at lower combustion temperatures, significantly reducing nitrogen oxide formation. At the same time, the technology allows desulfurization to occur directly during combustion, lowering sulfur dioxide emissions without the need for expensive flue gas treatment equipment. This dual benefit of low-NOx and in-furnace desulfurization makes CFBC technology an effective pathway to cleaner coal utilization.

Because of these advantages, CFBC boilers have been widely adopted in industries such as chemicals, building materials, power generation, and metallurgy. They are particularly suitable for regions with abundant but lower-grade coal resources, offering stable steam supply without compromising environmental standards. Against this background, ZOZEN Boiler has developed the SHX series CFBC boilers, providing advanced technical solutions for global customers.

ZOZEN SHX Series CFBC Boilers

ZOZEN Boiler has accumulated decades of design and manufacturing experience, and its SHX series represents the company’s expertise in the CFBC field. Designed for steam capacities ranging from 10 to 35 tons per hour, the SHX CFBC boiler has become a reliable choice for enterprises requiring steady energy output at a competitive cost.

ZOZEN 35 ton SHX cfbc boilers

At the heart of the SHX series is the circulating fluidized bed combustion technology, this low-temperature combustion environment results in nitrogen oxide emissions around 100 mg/Nm³, a figure far below that of conventional pulverized coal units. Moreover, the system enables in-situ desulfurization by adding limestone into the furnace. The reaction between limestone and sulfur dioxide removes sulfur directly during combustion, achieving high desulfurization efficiency at a fraction of the cost of installing and operating separate flue gas desulfurization systems.

The fuel adaptability of the SHX CFBC boiler is another core advantage. It can efficiently burn a variety of coals, including low-calorific and high-ash fuels, as well as biomass blends. This flexibility is critical in areas where coal quality is variable, reducing fuel supply risks and ensuring continuous operation.

The design of the SHX boiler also emphasizes high combustion efficiency and complete fuel utilization. The recirculation of solid particles within the furnace allows unburned fuel to be returned and burned again, pushing the overall combustion efficiency to higher levels than traditional grate-fired boilers. At the same time, the ash discharged from the furnace has high activity, making it suitable for secondary use in construction materials, thus minimizing waste and avoiding secondary pollution.

For the SHX series in the 10–35 ton range, the steam pressure options are typically between 1.25 MPa and 2.5 MPa, while steam temperatures vary from 194°C up to 400°C depending on design specifications. These parameters meet the requirements of a wide range of industrial processes, from chemical synthesis to material drying and product sterilization.

Another notable feature is the broad load adjustment capability of CFBC technology. The SHX boiler can reliably operate at as low as 30% of its rated load without compromising combustion stability. This flexibility allows factories to adapt to seasonal or process-related fluctuations in steam demand, avoiding energy waste during off-peak periods.

With its advanced furnace design, optimized air distribution system, and efficient heat exchange surfaces, the SHX CFBC boiler achieves thermal efficiencies exceeding 81%. This translates into lower fuel consumption and reduced operating costs over the lifetime of the boiler. Combined with its low-NOx and high in-furnace desulfurization performance, the SHX CFBC boiler ensures that enterprises meet stringent environmental standards without heavy investments in additional flue gas cleaning systems.

Case Study: Chemical Industry Application

The advantages of CFBC boilers are best illustrated through real industrial applications. A chemical company specializing in PVC production recently faced the challenge of securing a reliable and efficient steam supply while keeping energy costs under control. PVC production requires continuous high-temperature steam for various stages of the process, including polymerization and drying. The company’s existing equipment consumed significant amounts of fuel each year, raising both cost and environmental concerns.

After a comprehensive evaluation, the company decided to invest in two units of ZOZEN’s SHX series CFBC boilers, each rated at 35 tons per hour. These boilers, designed with steam pressures between 1.25 and 2.5 MPa and steam temperatures ranging from 194°C to 400°C, provided exactly the performance parameters needed for the PVC production line.

The decision quickly proved beneficial. The broad fuel adaptability allowed the company to utilize lower-grade coal resources, lowering fuel procurement costs without sacrificing steam quality. The high combustion efficiency of the SHX boilers further reduced fuel consumption, delivering notable savings. Preliminary calculations showed that the new boilers reduced fuel expenses by tens of thousands of yuan annually, while also significantly lowering power consumption thanks to the efficient air distribution and circulation systems.

In addition, the environmental performance of the boilers met national requirements without the need for costly end-of-pipe treatment. The in-furnace desulfurization process reduced sulfur emissions effectively, while nitrogen oxide levels remained far below regulatory limits. With ZOZEN’s technical support and on-site service, the project was smoothly implemented, ensuring the chemical enterprise could operate its PVC production lines with confidence and sustainability.

Conclusion: Why Choose ZOZEN CFBC Boilers 

As industries strive for efficiency, cost savings, and environmental responsibility, CFBC boilers have become a preferred solution. Their ability to burn low-grade fuels efficiently, reduce emissions through low-temperature combustion, and achieve in-furnace desulfurization offers significant advantages over conventional technologies.

ZOZEN’s SHX series CFBC boilers embody these strengths, providing robust performance, flexible fuel adaptability, and proven energy savings. The case of the chemical enterprise in PVC production highlights how these boilers can directly reduce costs while meeting environmental regulations.

With strong technical expertise, international project experience, and a customer-focused service model, ZOZEN Boiler continues to support global industries with advanced steam solutions. For companies evaluating their next investment in steam generation, choosing a ZOZEN CFBC boiler means securing not only reliable equipment but also long-term operational stability and support.