A heat boiler is a core piece of thermal equipment widely used in district heating, industrial facilities, commercial buildings, and municipal infrastructure projects. Its primary function is to convert fuel energy into thermal energy and deliver hot water or heating media to end users in a stable and controlled manner. Compared with other thermal systems, a heat boiler emphasizes continuous operation, stable temperature output, and high reliability, which are especially important in large-scale heating applications where interruptions can directly affect daily life and industrial productivity.

As a professional industrial boiler manufacturer, ZOZEN BOILER has accumulated extensive experience in the design and manufacturing of heat boiler systems for industrial and municipal applications. Through continuous technical development and project-based optimization, ZOZEN BOILER provides heat boiler solutions that focus on structural reliability, thermal efficiency, and long-term operational stability. These solutions are widely applied in district heating networks and infrastructure projects that require dependable heat supply under demanding operating conditions.

SZS Gas-Fired Hot Water Boiler: Structure, Technology, and Heating Performance

Among ZOZEN BOILER’s heating products, the SZS series gas-fired hot water boiler is a representative heat boiler solution designed for medium- and large-scale heating systems. This series adopts a double-drum water tube structure, which allows for efficient heat transfer, stable circulation of the working medium, and reliable performance under continuous load conditions. The water tube configuration enhances heat absorption efficiency and ensures uniform temperature distribution throughout the boiler system.

ZOZEN SZS 50MW hot water heat boiler

The combustion system of the SZS heat boiler is designed to achieve complete and stable fuel combustion. By optimizing the furnace structure and combustion chamber layout, the boiler ensures that fuel and air are mixed effectively, allowing heat to be released evenly and transferred efficiently to the water circulation system. This design supports stable outlet water temperatures, which are essential for district heating applications where consistency directly affects user comfort and system reliability.

Thermal insulation plays a crucial role in the overall performance of a heat boiler. The SZS series integrates high-performance insulation materials into the boiler body to reduce heat loss during operation. By minimizing thermal dissipation to the surrounding environment, the boiler maintains higher energy utilization efficiency and supports stable heat output during long-term operation. This insulation design also contributes to safer surface temperatures, improving operational safety in heating facilities.

Another important technical feature of the SZS heat boiler is its membrane wall structure. The membrane wall enhances the overall rigidity of the furnace while improving sealing performance. This design helps prevent air leakage, supports stable combustion conditions, and promotes uniform heat transfer across the heating surfaces. By reducing localized overheating and thermal stress, the membrane wall structure contributes to the long-term durability of the boiler.

The combustion chamber of the SZS heat boiler is equipped with a narrow-pitch membrane water-cooled wall configuration. This arrangement increases the effective heat absorption area and improves the airtightness of the furnace. Enhanced airtightness ensures that fuel combustion occurs under controlled conditions, reducing unnecessary heat loss and supporting consistent heating performance. For large-scale heating systems, this design plays an important role in maintaining stable output temperatures during peak demand periods.

In terms of system control, the SZS heat boiler is designed to operate with advanced control systems that allow precise regulation of combustion, water circulation, and temperature output. Automated control helps the boiler respond smoothly to changing heating loads, which is particularly important for municipal heating systems that experience significant fluctuations between day and night or across seasons. This level of control supports safe operation, reduces manual intervention, and improves overall system reliability.

Heat Boiler Application in an Uzbekistan District Heating Project

With the acceleration of urbanization and economic development in Uzbekistan, municipal heating demand has increased significantly. Expanding residential areas, commercial buildings, and public infrastructure have placed higher requirements on the stability and capacity of centralized heating systems. In response to this growing demand, China Zhongyuan Company successfully won a key heating project in Uzbekistan, aiming to improve local heating infrastructure and ensure reliable heat supply for urban users.

Based on the project requirements, ZOZEN BOILER recommended a heating system consisting of two units of SZS30-1.6-120/70-YQ and one unit of SZS50-1.6-120/70-YQ gas-fired hot water boilers. These SZS series units were selected to meet the heating capacity and operational stability requirements of the Uzbekistan project while supporting continuous operation under varying load conditions.

To reduce heat loss and improve overall thermal efficiency, ZOZEN BOILER applied aluminum silicate fiber combined with refractory mortar as insulation materials on the boiler body. These materials provide strong thermal insulation performance and maintain stability under high-temperature conditions, ensuring that the heat boiler operates safely and efficiently over extended periods. This insulation approach supports consistent heat output and contributes to long-term energy efficiency.

The SZS heat boiler units also feature a full membrane wall structure, which allows for more uniform heat distribution and reduces the risk of localized overheating. This structural design improves the overall thermal conversion efficiency of the boiler and enhances operational stability, which is particularly important in municipal heating projects that require uninterrupted heat supply.

In addition, the combustion chambers of the SZS heat boiler units are equipped with narrow-pitch membrane water-cooled walls. This design improves furnace airtightness and ensures that fuel combustion occurs in a controlled environment. By enhancing heat absorption and reducing thermal losses, the combustion chamber design supports stable heating performance and reliable temperature control throughout the heating network.

Technical Advantages of ZOZEN Heat Boiler Solutions

ZOZEN BOILER’s heat boiler systems demonstrate clear technical strengths in terms of thermal efficiency, structural reliability, and operational stability. Optimized combustion systems ensure efficient fuel utilization, while advanced insulation materials minimize heat loss and support consistent output temperatures. The water tube structure and membrane wall design enhance heat exchange performance and improve overall system durability.

By integrating engineering design expertise with practical project experience, ZOZEN BOILER provides heat boiler solutions that are well suited to municipal heating and infrastructure applications. These systems are designed to operate reliably under continuous load conditions, adapt to changing heating demands, and maintain stable performance over long service periods.