fully wet back three return steam boiler, industrial boiler manufacturer ZOZEN boiler comprehensively analyzes the low nox principle of natural gas boilers
As an industrial boiler manufacturing company with more than 30 years of development history, ZOZEN today's achievements are inseparable from its sustainable development concept. Recently, ZOZEN reached cooperation with Libbey Inc., the global glassware industry giant. The two sides shared the same development concepts and became friendly and trustworthy partners.

fully wet back three return steam boiler, The SZS series oil-fired/gas-fired boiler proper adopts the D-type structure. One side is the furnace, and the other side is the convection heating surface. The partition walls around the furnace body, the partition wall between furnace and convection section, and the front and rear walls all adopt the membrane wall structure. There are foreign advanced burner, economizer and condenser installed at the end of flue gas duct, which can lower the exhaust gas temperature to 60℃, achieve the thermal efficiency of over 98% and control the emission of NOx to less than 30mg/Nm3. This kind of boiler has the characteristics of energy saving and environmental protection, safety and efficiency, simple operation and maintenance, and fully automatic control system which can realize unattended operation.
ZOZEN WNS series boiler is designed with large-diameter corrugated furnace and wet-back structure. Depending on the velocity of different flue gas, proper heat transfer element will be selected. Advantages:high efficiency, low back pressure, ultra-low NOx emissions.
As a professional industrial boiler manufacturer, Wuxi ZOZEN Boilers Co., Ltd. pays attention to quality and adheres to the spirit of craftsmanship to guarantee the quality of boiler products through a complete quality assurance system. In 2020, ZOZEN Boiler regards quality management as one of the key breakthroughs of corporate development, and adopts a series of powerful reform measures to enhance the quality awareness of all employees and the quality of corporate development, fully wet back three return steam boiler.
In Shandong area, ZOZEN Boiler has won a large number of loyal users with its strong corporate strength and good market reputation. ZOZEN’s local market share is still increasing. In March of this year, ZOZEN Boiler successfully reached the cooperation with Sinochem Hongrun, one of the top 100 enterprises in Shandong Province, and provided it with a number of YQL series gas-fired thermal oil heaters with good environmental protection performance.
Quality and service are the foundation of the company. Over the years, ZOZEN has won the recognition and trust of many enterprise users due to the high product quality guarantee the intimate service provided to customers in the sales and after-sales links.
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13 Jan 2026ASME Certification Powers ZOZEN Boiler’s Multi-Industry, Multi-Region Growth
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As clean heating upgrades continue to accelerate across northern China, high-efficiency and environmentally compliant heating equipment has become essential to ensuring winter heating security while supporting the country’s carbon reduction goals. In Tianjin, several large district heating companies have independently selected the same core solution — the ZOZEN SZS series gas-fired hot water boiler — delivering stable heat throughout the winter while contributing to improved ai...27 Jan 2026 -
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