Condensing Steam Boiler —— Dongguan Xinhuanna Boiler Co., Ltd. The condensing steam boiler is designed with advanced and reasonable features, ensuring performance that is safe and reliable. The WNS model features a wet back three-pass design, full corrugated furnace shell, and threaded flue tube structure, which boasts excellent thermal expansion properties. The tube plate and cylinder are connected using a flange connection structure, and the main body welds are of the butt joint type, all employing submerged arc automatic welding. The boiler has ample heating surface area, a large furnace chamber structure, micro-positive pressure combustion, low combustion heat load, and minimal emissions of harmful substances. The boiler combustion chamber design is rational and fully adaptable to various fuels such as city gas, light diesel oil, heavy oil, and more. The fuel burns under micro-positive pressure within the furnace, ensuring complete combustion with minimal smoke pollutants. The technical indicators such as smoke gas opacity, dust opacity, concentration, and noise of the boiler all exceed the national first-class area standards. High thermal efficiency. The boiler's radiant heating surface is a full corrugated furnace shell, and the convective heating surface uses threaded flue tubes, with a large heating surface area, achieving a boiler thermal efficiency of over 95%, exceeding the national regulations. High-quality welding. The main longitudinal and circular welds of the boiler are heat-treated after welding according to JB/T1613 to eliminate stress, ensuring high welding quality. Automated welding equipment is used. Aesthetic and innovative appearance. The boiler's outer shell is made of colored steel plates, with hinged smoke boxes at the front and rear, and a high-temperature spray-painted surface for a fresh and beautiful look. Burners are imported from international brands such as Italy's Liao, Italy's Bader, and Finland's Oylin. Key valves, such as Siemens from Germany, Schneider from France, and Omron from Japan, are provided to ensure safe boiler operation. PLC Full Intelligent Control System. The company has independently designed and developed an intellectual property rights-owned PLC full automatic intelligent control system, utilizing a combination of mechanical and electrical integration control equipment and programmable logic controllers (PLCs). The programmable logic controller (PLC) serves as the "central processing unit" of the control system. The control system is operated via a touch screen, significantly enhancing the level of automation and reliability of the boiler, making operation simpler and more intuitive.