In the global industrial market, the demand for coal fired steam boiler for sale remains significant, particularly in industries such as paper manufacturing, textiles, food processing, building materials, and power generation. These boilers continue to be an important source of high-temperature steam, which is indispensable for heating, drying, and sterilization processes. One of the reasons they maintain strong market demand is their ability to deliver stable and continuous energy at relatively low fuel costs, especially in regions where coal remains abundant and affordable.

The price of a coal fired steam boiler for sale varies widely depending on capacity, design, auxiliary equipment, and environmental compliance requirements. Factors such as steam output , operating pressure, efficiency levels, and emission controls significantly influence the final investment cost. For large-scale enterprises, the decision is not simply about upfront purchase price but also about long-term operating costs, fuel flexibility, and service reliability.

Within this competitive landscape, ZOZEN Boiler has established itself as a trusted supplier of industrial steam systems. With years of experience in designing and manufacturing large-capacity coal-fired units, the company offers solutions that combine advanced engineering with practical operation, helping enterprises secure both efficiency and durability.

SZL Series Coal Fired Steam Boiler: Parameters, Technology, and Advantages

The SZL series coal fired steam boiler for sale represents one of ZOZEN’s key product lines, designed to meet the high-volume steam requirements of industries that rely on coal as their primary fuel. This boiler adopts a double-drum, chain-grate structure with a longitudinal layout, making it suitable for evaporation capacities ranging from 6 tons to 35 tons per hour.

ZOZEN 25 ton SZL coal-fired boiler

Structural and Technical Features

Double-Drum Layout: The SZL boiler is built with two drums arranged longitudinally, which creates a large heating surface and improves steam-water circulation. This ensures stable steam generation and reduces the risk of water carryover.

Chain Grate Feeding System: Fuel is evenly delivered into the furnace by a moving chain grate, guaranteeing continuous combustion. This design minimizes fuel waste and ensures uniform burning, which directly improves heat transfer efficiency.

Independent air bunker: Different numbers of independent air bunkers are set according to the tonnage of the boiler, and the air distribution can be adjusted according to the combustion conditions to ensure sufficient combustion of the fuel.

Water-Cooled Membrane Wall: The furnace adopts a tightly sealed membrane water wall structure that reduces radiation heat loss and enhances overall boiler efficiency. This also increases the durability of the furnace by protecting against high-temperature deformation.

Convective Heating Surface: The boiler is equipped with convection tube bundles, which expand the heat transfer area and maximize energy utilization. Together with economizers and air preheaters, flue gas temperature is effectively reduced, and thermal efficiency can reach above 81%.

The SZL series is designed to deliver high-quality steam , a crucial factor in processes where moisture reduction is essential, such as pulp drying, food sterilization, and chemical synthesis. The large furnace volume allows for full fuel combustion, while independent air chambers enable precise air distribution across the grate. This not only improves combustion stability but also helps adapt to coal of different calorific values.

For enterprises seeking a coal fired steam boiler for sale, the SZL boiler offers a combination of steady output, high thermal efficiency, and fuel adaptability. Additionally, emission reduction devices such as dust collectors, desulfurization units, and denitrification systems can be integrated to meet increasingly stringent environmental regulations.

Considerations When Purchasing a Coal Fired Steam Boiler for Sale

When evaluating a coal fired steam boiler for sale, companies should pay close attention to several aspects:

Fuel Availability and Quality: The type and consistency of coal supply directly impact combustion stability and operating costs.

Steam Requirements: Accurate calculation of required steam tonnage, working pressure, and temperature ensures the boiler matches production needs without overloading.

Efficiency and Auxiliary Systems: The presence of economizers, air preheaters, and advanced control systems greatly affects long-term energy consumption.

Environmental Compliance: With tightening global emission standards, the inclusion of flue gas treatment systems is critical.

Service and Maintenance: Reliable after-sales support ensures reduced downtime and longer equipment lifespan.

ZOZEN SZL Coal Fired Steam Boiler in Indonesia Paper Industry

One of the representative projects showcasing ZOZEN’s expertise involves a paper mill in Indonesia. As paper manufacturing is heavily dependent on consistent high-temperature steam, the company required a reliable solution to enhance production efficiency and maintain product quality.

ZOZEN supplied two 25-ton per hour SZL series coal fired steam boilers for this project. The boilers were designed to generate steam with high dryness, which minimized heat loss during energy transfer. In paper production, steam is vital for both pulp heating and drying processes, and the availability of high-quality steam significantly improved the removal of moisture during sheet formation.

The use of chain grate combustion played a decisive role in ensuring the efficiency of the system. By feeding coal evenly across the furnace, the grate achieved consistent fuel distribution and uniform burning. This stable combustion guaranteed steady heat release, maximizing the effectiveness of heat exchange surfaces. For the paper mill, this meant not only improved steam quality but also higher energy utilization, leading to reduced operating costs.

Through this project, ZOZEN demonstrated how its SZL series is not only capable of meeting large-scale industrial steam demands but also adaptable to the operational realities of enterprises in emerging markets, where coal remains a primary energy resource.

Choosing ZOZEN for Coal Fired Steam Boiler for Sale

The demand for coal fired steam boiler for sale continues across industries where coal is still an essential energy source. While prices vary depending on capacity, auxiliary equipment, and emission standards, enterprises must look beyond upfront investment and consider efficiency, reliability, and after-sales service.

ZOZEN’s SZL series delivers dependable solutions with advanced design, strong fuel adaptability, and proven application across industries such as textiles, chemicals, paper manufacturing, and food processing. Beyond supplying high-performance equipment, ZOZEN emphasizes comprehensive after-sales services, including on-site installation guidance, operator training, and long-term maintenance support.

By combining engineering expertise with customer-focused service, ZOZEN Boiler provides not only a coal fired steam boiler for sale but also a complete energy solution that helps enterprises achieve production stability, operational efficiency, and long-term sustainability.