A 6 tph boiler, or a 6 tons per hour steam boiler, is widely used in medium-scale industrial production lines where a stable and continuous steam supply is essential. With a capacity to generate six tons of steam each hour, this category of boiler is ideally suited for enterprises seeking efficiency, reliability, and cost management in their energy systems. Steam remains one of the most important energy carriers in industries such as building materials, textiles, food processing, chemicals, and light manufacturing.

The 6 tph boiler is typically applied in production processes that require consistent thermal energy for heating, drying, or sterilization. Due to its moderate steam capacity, it bridges the gap between smaller boilers designed for localized tasks and larger units built for heavy industry. One of the major advantages of a 6 tph unit is its adaptability; it can be configured to burn various fuels, including natural gas, oil, coal, or biomass. This flexibility allows industries to select the most cost-effective and sustainable option based on their local fuel availability.

Among the many boiler manufacturers in the market, ZOZEN Boiler has established itself as a trusted name. With over three decades of experience in boiler research, design, and production, ZOZEN provides 6 tph boilers tailored to different industrial applications. Its product portfolio includes fuel oil and gas boilers, biomass boilers, and coal-fired boilers, each designed with advanced technical features to ensure safety, efficiency, and environmental compliance.

ZOZEN WNS gas-fired 6 tph boiler

ZOZEN 6 TPH Boiler Product Range

The WNS series is a shell-type, three-pass, wet-back boiler designed for fuel oil or gas firing. As a 6 tph boiler, the WNS model features a large diameter, fully corrugated furnace which enhances heat transfer and provides ample space for combustion. The threaded smoke tubes further expand the heating surface and improve overall thermal efficiency.One of the technical highlights of the WNS series is the use of condensing economizers and energy-saving devices installed at the flue gas exit. By recovering waste heat from flue gases, the system can increase boiler efficiency to above 98%, significantly reducing fuel consumption and operational costs. This makes the WNS series particularly attractive for industries facing high energy expenditures.The intelligent control system integrated into the WNS boiler allows for automated monitoring of pressure, temperature, and water levels. Combined with advanced low-NOx burners, the unit not only ensures safe operation but also minimizes nitrogen oxide emissions, aligning with increasingly strict environmental standards.

ZOZEN’s DZL series is a biomass-fired, single-drum boiler well-suited for enterprises seeking renewable energy solutions. As a 6 tph boiler, it incorporates a chain grate feeding system, enabling continuous fuel supply and stable combustion. The furnace chamber is designed with a sufficient volume to allow complete fuel burning, while water-cooled membrane walls improve heat transfer and sealing performance.This model is highly adaptable to a variety of biomass fuels, including wood chips, rice husks, and agricultural residues. Depending on the fuel’s ash content and particle size, ZOZEN offers customized grate systems to ensure consistent efficiency. With an optimized air distribution design, the DZL series maintains clean combustion and reduces particulate emissions. Its single-drum structure simplifies operation and maintenance while ensuring long-term reliability.

For industries where coal remains a primary fuel, ZOZEN’s SZL series provides a reliable 6 tph boiler option. This double-drum, water-tube boiler features a chain grate stoker and a layout that enhances water circulation and steam output stability. The furnace is designed with a large volume and arranged with densely packed water-cooling tubes, significantly improving heat absorption.The SZL series also offers effective ash-handling systems and optimized convection heating surfaces that reduce the risk of fouling. By adopting independent air chambers beneath the grate, the combustion process can be finely controlled, leading to complete fuel utilization and reduced emissions. For clients operating in regions where coal is abundant and cost-effective, the SZL series provides a practical and durable solution.

Case Study: AAC Block Production

In the production of autoclaved aerated concrete (AAC) products, multiple stages such as crushing, grinding, mixing, and autoclaving rely heavily on steam. Among these, the autoclave curing process is particularly critical, as it determines the final strength, durability, and quality of AAC blocks. The autoclave system requires stable and continuous steam supply, making the selection of a dependable boiler a key factor in project success.

A construction materials enterprise engaged in AAC block production partnered with ZOZEN Boiler to meet its energy needs. For this project, ZOZEN supplied a WNS series 6 tph boiler fueled by natural gas. The unit’s three-pass wet-back structure ensured efficient combustion and heat transfer, while the corrugated furnace provided ample space for complete fuel burning. The threaded smoke tubes expanded the heat exchange area, improving thermal performance.

To further increase efficiency, the client opted for a condensing economizer installed at the boiler’s tail section. This addition allowed recovery of waste heat from flue gases, raising the boiler’s efficiency to more than 98%. For the AAC block production line, this meant reduced fuel expenses, stable steam supply, and improved product quality through consistent curing conditions. The WNS boiler’s intelligent control system also ensured safe operation with minimal operator intervention, reducing labor costs and supporting streamlined plant management.

This case demonstrates the suitability of a 6 tph boiler for medium-scale industrial projects, where steam continuity, fuel efficiency, and environmental compliance are all essential. By providing a customized solution, ZOZEN enabled the client to secure reliable steam while achieving long-term cost savings.

Advantages of Choosing ZOZEN 6 TPH Boiler

The advantages of ZOZEN’s 6 tph boiler offerings lie in their combination of engineering innovation, fuel adaptability, and lifecycle support. Each model—whether WNS, DZL, or SZL—has been developed with a focus on maximizing efficiency while reducing environmental impact. The design elements, such as corrugated furnace structures, optimized convection surfaces, and multi-zone air distribution, ensure complete fuel combustion and consistent steam output.

Beyond the technical merits, ZOZEN stands out with its comprehensive service framework. From initial consultation and customized design to installation, commissioning, and operator training, the company provides end-to-end support. After commissioning, ZOZEN offers ongoing inspection services, spare parts supply, and technical upgrades, ensuring clients benefit from stable and efficient operation throughout the boiler’s lifecycle.

For enterprises seeking dependable, efficient, and adaptable steam solutions, choosing a ZOZEN 6 tph boiler is a strategic investment in sustainable industrial development.