CWPC (China Western Power Industrial Co., Ltd.) boasts profound technical accumulation and extensive engineering practice in bagasse boilers, with its products and technologies ranking among the industry leaders worldwide.

Product Portfolio & Technological Evolution

In the 1980s, CWPC pioneered the layout of renewable energy equipment and focused on R&D of biomass-fired boiler technologies. The company launched a full lineup of eco-friendly equipment, including pure bagasse-fired boilers, bagasse-coal co-firing boilers, and multi-biomass co-firing boilers with bagasse as the base fuel, setting multiple industry milestones. Its independently developed 75 t/h bagasse boiler, the first of its kind in China, filled the domestic technological void at that time.

CWPC features a complete portfolio of bagasse boilers, spanning capacities capacities from 35 t/h to 260 t/h and pressure levels from 3.82 MPa to 10.5 MPa, fully meeting the customized needs of sugar mills and biomass power generation projects of various scales. Taking the core 170 t/h bagasse boiler as an example, its design thermal efficiency is ≥90%, with stable annual operation exceeding 7,500 hours. Its environmental emission indicators are better than industry standards, offering excellent operational economy and environmental performance.

Core Technical Features and Structure

CWPC’s bagasse boilers are uniquely customized according to the inherent combustion characteristics of bagasse fuel, enabling high-efficiency, stable and long-term reliable operation.

Fuel Adaptability: The boilers support 100% pure bagasse combustion and co-firing of bagasse with pulverized coal and other biomass fuels. They are applicable to conventional biomass such as sugarcane leaves, wood chips and bark, and can also achieve stable co-firing of special biomass feedstock such as marabu shrubs for Cuba projects, meeting application demands under diverse fuel supply conditions across regions.

Key Structure and Systems: The boilers adopt industry-proven natural circulation and fully suspended membrane water wall structure. Core components including furnace, evaporator, superheater, economizer and air preheater are optimized based on fluid dynamics and combustion dynamics, delivering outstanding operational efficiency and structural stability. The steam drum is equipped with a dual steam-water separation device consisting of guided flow cyclone separators and louver separators to maximize steam quality. A dedicated pneumatic fuel spreading feeder ensures even fuel distribution on the grate for complete and balanced combustion.

Customized Technical Solutions: Bagasse is a high-volatile and low ash-melting-point biomass fuel. It is highly sensitive to moisture in ignition temperature, prone to uneven combustion mixing, poor ignition stability, irregular particle combustion and unclear combustion zones. Its high moisture content also raises flue gas dew point, causing potential low-temperature corrosion and ash deposition on rear low-temperature heating surfaces. To address these industry pain points, CWPC has adopted a full set of customized technical solutions:

1.Optimize the combustion mode to improve thermal efficiency

By employing a combined layer-fired and fluidized-bed combustion method, coupled with staged air supply and precise combustion air control technology, the system enhances the mixing and turbulence of air and fuel, extends the fuel’s residence time in the furnace, ensures complete fuel combustion, and significantly improves the boiler’s overall thermal efficiency.

2. Prevent operational risks and ensure equipment reliability

By optimizing the furnace cross-sectional dimensions and appropriately setting the refractory lining height and flue gas temperature at the furnace outlet, we address issues such as incomplete combustion of carbon particles, ash accumulation, coking, and low-temperature corrosion at the design stage, thereby enhancing the boiler’s operational reliability and economic efficiency.

3.Maintain a stable steam temperature to prevent equipment failures

The superheater system employs a combined radiation-convection structure and two-stage water-injection desuperheating technology, effectively addressing flue gas temperature deviations caused by uneven combustion, preventing superheater tube bursts due to overheating, and ensuring stable and controllable steam temperature parameters.

4.Resolving corrosion and ash buildup at the outlet to extend equipment lifespan

By optimizing the layout of the air preheater, selecting large-diameter tubes and specialized corrosion-resistant materials, and effectively controlling air and flue gas temperatures, we have addressed the industry-wide challenges of corrosion and ash buildup in the rear heat transfer surfaces by adopting a multi-faceted approach that encompasses structure, materials, and operating parameters.

Typical Projects and Market Recognition

CWPC’s bagasse boiler technology, with its mature processes and excellent performance, has been widely applied in both domestic and international markets, earning high industry recognition and establishing CWPC as a key equipment supplier in the global bagasse biomass power generation sector.

Overseas Benchmark Project: CWPC supplied one 75 t/h high-temperature, high-pressure bagasse boiler and one 160 t/h medium-temperature, medium-pressure bagasse boiler for the Ratchaburi Sugar Mill Project in Thailand. As core equipment for the project, it helped the project win the 2018 China Construction Engineering Luban Prize (Overseas Project). Since commissioning, the project has operated stably, with all performance indicators meeting design requirements, delivering significant economic benefits to the owner.

Luban Prize (Overseas Project) – Ratchaburi Sugar Mill Project, Thailand

Innovative Co-firing Project: In the Cuban market, CWPC undertook the world’s first 2×130 t/h high-temperature, high-pressure special biomass boiler for co-firing bagasse and marabu shrubs. In the project’s early stage, CWPC specially shipped local marabu shrub fuel back for comprehensive trial combustion tests. Precise data analysis was used to optimize the design, ensuring successful one-time commissioning and operation, pioneering the application of special biomass co-firing boilers

Extensive Market Application: CWPC has served over 100 projects with its bagasse boilers, maintaining a leading market share. In the domestic market, core installations are concentrated in Guangxi, China’s main sugarcane-producing region, serving major sugar enterprises such as Guangxi East Asia Sugar Group, Guangxi Tiandong Nanhua Sugar, Guangxi Ningming Biomass Energy, Guangxi State Farms Sugar Group Liuxing Sugar Refinery, and Guangxi Guigang Ganhua Co., Ltd., with various bagasse boiler models (65 t/h – 170 t/h) reliably supporting local sugar and biomass energy industries

In the international market, products have been successfully exported to Thailand, Brazil, Vietnam, Ethiopia, Cuba, and other countries. Key projects include Uthai Thani 120 t/h in Thailand, Thai EKALUCK POWER CO., LTD. 250 t/h in Thailand, and OMO1-OMO3 170 t/h in Ethiopia, reflecting the continuous deepening of CWPC’s global presence.

SADA Bagasse Boiler, Brazil

CWPC remains focused on the bagasse boiler sector. Supported by a complete product lineup, mature core technologies, continuous innovation capability and rich engineering experience, the company has achieved outstanding results in improving fuel utilization efficiency, ensuring long-cycle reliable equipment operation, and advancing the development of biomass circular economy. It has grown into a highly competitive core supplier in the global renewable energy equipment industry.