zozen boiler
Home Service FAQs FAQ of gas-fired(oil-fired) boilers What is the structure and process principle of horizontal gas-fired three-pass boiler?

What is the structure and process principle of horizontal gas-fired three-pass boiler?

18 Nov 2022

Industry boiler is an important thermal power device, which is widely used in factory power, building heating, people's life and other aspects, with a large demand and a wide variety. According to the different flue gas passes, gas-fired boilers are divided into two-pass and three-pass boiler structures. Here, ZOZEN Boiler focuses on the structure and process principle of the common three-pass boiler.

 

The first pass: after the fuel is atomized by the burner, the formed torch is filled in the full-waveform furnace liner and transmits radiant heat through the wall of the furnace liner;

 

The second pass: the high-temperature flue gas generated by combustion gathers in the combustion chamber and turns into the second return journey, that is, the tube bundle area of the threaded flue pipe. After convective heat exchange, the flue gas temperature gradually decreases and then reaches the front flue box, where it turns into the third return journey;

 

The third pass: To reduce the resistance, the third return trip is designed as a smooth tube bundle area. After heat exchange, the flue gas then enters the condensing economizer and chimney through the rear smoke box, and is finally discharged into the atmosphere.

 

WNS horizontal gas-fired boiler produced by ZOZEN has three passes, with a single capacity of 1-20t/h, which has the characteristics of safety, reliability, high efficiency, energy saving and environmental protection, convenient maintenance, automatic and intelligent control, etc. The thermal efficiency of the boiler is as high as 98% or more, and the low nitrogen emission of NOx below 30mg/Nm³ can be realized.

Related news View More
  • ZOZEN Boiler Makes a Successful Appearance at the 2025 Russia Heating & Boiler Exhibition
    On May 29, 2025, the three-day Russia Heating Exhibition (HEAT&ELECTRO MACHINERY) successfully concluded at the Timiryazev Center in Moscow. As a prestigious professional exhibition for thermal and electric power equipment, this year’s event attracted 150 high-quality enterprises and over 8,000 professional visitors from around the world. ZOZEN Boiler, in collaboration with Manto Chemistry, showcased a range of high-efficiency and environmentally friendly boiler products, demonstrating...
    03 Jun 2025
  • ZOZEN Boiler's Reciprocating Grate Boilers Excel Overseas, Empowering Multiple Industries with Efficient Operation
    In recent years, as global energy demands continue to rise and environmental regulations become increasingly stringent, high-efficiency boiler equipment has garnered significant attention in international markets. As an industry-leading boiler supplier, ZOZEN Boiler has achieved repeated success in overseas markets through its self-developed reciprocating grate technology, providing customized thermal solutions for multiple industries. Numerous projects exported to countries including Kyrgyzstan...
    27 May 2025
  • ZOZEN Gas-fired Boilers: A Reliable Force Driving Green Upgrades in the Automotive Industry
    As a technological pioneer and quality benchmark in the industrial boiler field, ZOZEN Boiler, with profound technical expertise, outstanding innovation capabilities, and reliable product performance, has deeply integrated into the automotive industry supply chain, becoming a steadfast partner for many internationally renowned automotive companies in achieving green and intelligent manufacturing. ZOZEN Gas-fired Boilers: The Firm Choice of the Automotive Industry Geely Auto: WNS Series Boile...
    20 May 2025

Find the Right Boiler For You

Name *

Email *

WhatsApp/WeChat

Products

Power/Capacity