Gas boiler structure:

   Hekou gas boilers are currently mainly available in the following types:WNSSeriesSZSSeries.WNSSeries boilers are primarily composed of the drum and the firebox as the two main components, featuring the second and third return螺纹tubes as the heating surface, also known as horizontal three-return boilers. What is meant by that is...“Wet Back Style” Boilers refer to the transition chamber of the boiler being moved into the interior of the drum, where the tube plate, back plate, and cylinder of the transition chamber are all surrounded by boiler water.(Immersed in furnace water)Therefore, it is referred to as“Wet Back Style”(Also known as water-backed style)。
   CurrentlyWNSAll the regenerative chambers in the series are submerged in water, making them wet-back boilers. The dry-back boilers do not have a full enclosure in water. The He Guo gas boilers use a wet-back structure. Additionally, to ensure the safe and economic operation of the boiler, auxiliary instruments, automatic control systems, and protection systems are also added.

    SZSSeries boilers belong to the vertical double-drum room-style fire-tube boilers. These boilers are of the up-and-down drum type with water-cooled walls. Between the drum and the lower header, there are downcomers and water-cooled wall tubes, forming the framework of the combustion chamber.

Gas boilers include gas water boiler, gas hot water boiler, gas steam boiler, etc. The gas hot water boiler is also known as gas heating boiler and gas bathing boiler. As the name implies, gas boilers refer to boilers fueled by gas. Compared to oil-fired and electric boilers, gas boilers are the most economical, which is why most people opt for gas boilers as equipment for steam, heating, and bathing.

Gas boilers include models such as the KS-Q Gas Water Boiler, CLHS (CWNS) Gas Hot Water Boiler, and LHS (WNS) Gas Steam Boiler. Among them, gas hot water boilers encompass both heating and bathing boilers. With the completion of the national "West Gas to East" project, gas boilers have gradually become the top choice for many.

The "Special Equipment Safety Supervision Regulations" define boilers as equipment that utilizes various fuels, electricity, or other energy sources to heat the contained liquid to certain parameters and then output thermal energy. The scope includes pressure steam boilers with a volume of 30L or more; pressure hot water boilers with an outlet water pressure of 0.1MPa or more (gauge pressure) and a rated power of 0.1Mw or more; and organic heat carrier boilers. [1]

Burner

The construction of the gas burner consists of the following 5 systems:

1. Air Distribution System

The function of the air supply system is to deliver air with a certain wind speed and volume into the combustion chamber, its main components include: the housing, fan motor,

Fan impeller, air gun nozzle, damper controller, damper blade, cam adjustment mechanism, diffuser disk.

2. Ignition System

The function of the ignition system is to ignite the mixture of air and fuel, with its main components including: ignition transformer, ignition electrode, and high-voltage ignition cable. A relatively safe type of ignition system is the electronic pulse igniter, widely used by manufacturers like Zhuoyi Energy-Saving for gas boilers. It is convenient and time-saving, requiring only a finger press to operate, and offers high safety, preventing accidents caused by accidental extinguishing. In case of a flame-out, the control system can promptly close the solenoid valve to shut off the gas supply.

3. Monitoring System

The function of the monitoring system is to ensure the safe and stable operation of the burner, with main components including flame sensors, pressure sensors, temperature sensors (as shown in the following illustration), etc.

4. Fuel System

The function of the fuel system is to ensure the fuel required for the burner's combustion. The fuel system of oil burners mainly includes: oil pipes and fittings, oil pumps, solenoid valves, nozzles, heavy oil preheaters. Gas burners primarily consist of filters, regulators, solenoid valve arrays, ignition solenoid arrays, and fuel butterfly valves.

5. Electric Control System

The electrical control system serves as the command and coordination center for all the aforementioned systems, primarily controlled by programmable controllers. Different programmable controllers are matched with various burners, with common types including the LFL series, LAL series, LOA series, and LGB series. The main difference lies in the varying duration of each program step.