Water-tube boiler sections

Last time we talking about water tube boiler in Singapore.Today, we will discuss water tube boiler sections as below:VR4Horizontal boiler

Water tube boiler sections:

The energy from the heat source may be extracted as either radiant or convection and conduction.VR4Horizontal boiler

The water tube boiler furnace or radiant section

This is an open area accommodating the flame from the burner. If the flames were allowed to come into contact with the boiler tubes, serious erosion and finally tube failure would occur. The walls of the water tube boiler furnace section are lined with finned tubes called membrane panels, which are designed to absorb the radiant heat from the flame.VR4Horizontal boiler

 Heat transfer in the furnace or radiant section.pngVR4Horizontal boiler
Heat transfer in the furnace or radiant sectionVR4Horizontal boiler

Convection sectionVR4Horizontal boiler
This part is designed to absorb the heat from the hot gases by conduction and convection.Large water tube boilers may have several tube banks (also called pendants) in series, in order to gain maximum energy from the hot gases.VR4Horizontal boiler

 Heat transfer in the convection section.pngVR4Horizontal boiler
Heat transfer in the convection sectionVR4Horizontal boiler

Water-tube boiler designation

Water-tube boilers are usually classified according to certain characteristics, see Table below:VR4Horizontal boiler

Water-tube boiler classifications.pngVR4Horizontal boiler
  Water-tube boiler classificationsVR4Horizontal boiler

Alternative water-tube boiler layouts

The following layouts work on the same principles as other water-tube boilers, and are available with capacities from 5 000 kg/h to 180 000 kg/h.VR4Horizontal boiler
Longitudinal drum boilerVR4Horizontal boiler
The longitudinal drum boiler was the original type of water-tube boiler that operated on the thermo-siphon principle (see Figure Longitudinal drum boiler below).VR4Horizontal boiler
VR4Horizontal boiler
Cooler feedwater is fed into a drum, which is placed longitudinally above the heat source. The cooler water falls down a rear circulation header into several inclined heated tubes. As the water temperature increases as it passes up through the inclined tubes, it boils and its density decreases, therefore circulating hot water and steam up the inclined tubes into the front circulation header which feeds back to the drum. In the drum, the steam bubbles separate from the water and the steam can be taken off.VR4Horizontal boiler
VR4Horizontal boiler
Typical capacities for longitudinal drum boilers range from 2 250 kg/h to 36 000 kg/h.VR4Horizontal boiler

Longitudinal drum boiler.pngVR4Horizontal boiler
Longitudinal drum boilerVR4Horizontal boiler

More water tube boiler, contact us to know more, like water tube boiler price (cost) , water tube boiler design,water tube boiler drawing etc.  [email protected]VR4Horizontal boiler

Tag: horizontal boiler,Water-tube boiler sections,Water-tube boiler classifications

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