Across many process industries, steam remains one of the most widely used energy carriers, capable of transferring heat efficiently while supporting diverse technological operations such as disinfection, drying, heating, extraction, distillation and CIP cleaning. In this environment, the diesel steam boiler has established an important position, especially in facilities where liquid fuel supply is convenient and where stable combustion characteristics and high-energy density are needed to match continuous production demands.

ZOZEN Boiler has built strong capabilities in designing and supplying diesel steam boiler systems for various industrial sectors. Whether users need a compact diesel steam boiler for a washing plant, or a higher-capacity boiler supporting multi-line industrial production, ZOZEN offers integrated solutions from scheme selection and sizing to installation guidance and operation support, helping the diesel steam boiler become a dependable energy center instead of an isolated standalone machine.

WNS and SZS Series: Core Diesel Steam Boiler Technologies from ZOZEN

Among ZOZEN’s product portfolio, the WNS and SZS series oil/gas fired steam boilers represent two mature technical routes for diesel steam boiler applications. They are designed to meet different layout conditions, capacity ranges and performance preferences while sharing the same focus on safety, heat-transfer optimization and automatic control integration.

ZOZEN 3 ton WNS series diesel steam boiler

The WNS series diesel steam boiler adopts a horizontal internal-combustion design with a full wet-back structure. In this configuration, the furnace and reversal chamber are completely surrounded by water-cooled surfaces, creating a closed and compact heat transfer environment. This arrangement not only increases the heat absorption area but also enhances the structural adaptability under thermal expansion conditions, reducing the stress concentration that typically occurs during start-up, shut-down and load change. As a result, the diesel steam boiler in WNS configuration performs with stable pressure-bearing characteristics and solid durability during long-term industrial operation.

The furnace in the WNS diesel steam boiler often uses a corrugated structure, which enlarges the radiant heating surface and strengthens the disturbance of flue gas flow, allowing more effective heat transfer to the boiler water. Threaded smoke tubes placed in the convection section further increase turbulence, enhancing convective heat exchange efficiency. With optimized flue gas pathways and reasonable furnace volume, the WNS diesel steam boiler can achieve efficient combustion of diesel fuel while maintaining steady steam output under rated conditions.

The SZS series diesel steam boiler represents another important design concept. It is typically configured as a double-drum, D-type water tube boiler, with the furnace and convection heating surfaces arranged in a compact, well-organized layout. Water tube design enhances circulation reliability and allows larger evaporation capacity options, which makes the SZS diesel steam boiler suitable for medium to large industrial plants that demand higher steam output and stable long-term continuous operation. The membrane wall structure forming the furnace enclosure provides good sealing and heat retention properties, supporting efficient radiation heat transfer while reducing heat losses.

Both WNS and SZS series diesel steam boiler products are equipped with advanced automatic control systems that integrate water level, steam pressure, temperature and burner management. Through an intuitive human–machine interface, operators can monitor real-time parameters and perform adjustments as necessary, simplifying management and contributing to safe operation. Burner systems can be configured for light diesel or heavy oil according to the project’s fuel conditions, while combustion organization is optimized to promote complete fuel burning and uniform flame distribution, minimizing localized overheating and helping maintain better emission performance.

Diesel Steam Boiler Supporting Hotel Laundry Operations in Hong Kong

The customer ordered multiple WNS series 3-ton diesel steam boiler units from ZOZEN. During the early stage of the project, the installation site presented a special challenge: the boilers had to be hoisted into the building through windows, and the allowable window height was only 2.3 meters. However, the standard design height of the ZOZEN 3-ton diesel steam boiler is about 2.4 meters, making direct hoisting impossible under these constraints. Instead of requiring the user to modify the building structure, ZOZEN’s design team analyzed the layout carefully and proposed a customized solution.

The designers reasonably changed the boiler height to approximately 2.2 meters and appropriately extended the body length of the diesel steam boiler, keeping the heating surface arrangement and performance parameters within the required range while enabling the equipment to pass through the existing window opening. Through structural adjustments and careful redesign of the layout of components, the installation difficulty was resolved without compromising the operating functions of the boiler. This reflects how the diesel steam boiler solution is not only about standard products, but also about engineering adaptability to real construction conditions.

Since the dimensions and structure of the multiple diesel steam boiler units ordered by the customer were adjusted from standard models, ZOZEN also provided professional pre-delivery commissioning services. Before leaving the factory, technical personnel performed targeted debugging, checking steam output performance, combustion stability, water circulation and control system coordination, ensuring that each customized diesel steam boiler met the required steam supply characteristics. By carrying out these tests ahead of shipment, the later on-site installation and start-up process became smoother, and the customer received equipment whose performance had already been verified under simulated operating conditions.

Choosing ZOZEN Diesel Steam Boiler for Stable Industrial Steam Supply

In modern industrial scenarios, the diesel steam boiler continues to play a vital role wherever dependable steam is essential and liquid fuel supply is feasible. Selecting an appropriate diesel steam boiler involves evaluating structural design, heat transfer configuration, combustion system, automatic control, environmental adaptability and service capability, all of which require a manufacturer with comprehensive technical background.

Through the WNS and SZS series oil and gas fired steam boilers, ZOZEN offers a rich set of solutions to users who need diesel steam boiler equipment with reliable performance, flexible engineering adaptation and strong support throughout the whole project cycle. From consultation and sizing to customization for installation constraints, along with pre-delivery commissioning and technical guidance, ZOZEN helps ensure that the diesel steam boiler becomes a stable part of the production system rather than a bottleneck.

For enterprises in hotel laundry, textiles, food processing, light industry and many other fields, partnering with ZOZEN for a diesel steam boiler solution means gaining not only a boiler body, but also integrated design, manufacturing and service support that contributes to secure steam supply and sustainable operation of their facilities.