A high pressure watertube boiler (also spelled water-tube and water tube) is a type of boiler in which water circulates in tubes heated externally by the fire. Fuel is burned inside the furnace, creating hot gas which heats water in the steam-generating tubes.
Coal-fired water tube boiler systems generate approximately 38% of the electric power generation worldwide and will continue to be major contributors in the future. Pulverized coal fired boilers, which are the most popular utility boilers today, have a high efficiency but a costly SOx and NOx control.
Bend Tube Boiler or Sterling Boiler is the developed version of water tube boiler. The working principle of bend tube boiler is more or less same as other water tube boilers, but it utilizes four drums.
A double solenoid safety system dumps over heated water in the storage tank to drain in addition to closing the flow of boiler water/HTHW to the heating coils. This option requires 120-volt, 5-amp electrical service. See page 23 for details. Anticipator Control System
Information and material submitted under this section shall be marked "SUBMITTED UNDER SECTION 23 52 33, WATER TUBE BOILERS", with applicable paragraph identification. Manufacturer's Literature and Data including: Full item description and optional features and accessories.
2. FEATURES OF FIRE-TUBE BOILERS The fire-tube boilers are potentially dangerous as the steam pressures are high and volume of hot water and steam content is large. * water surrounds the tubes through which hot combustion gases pass before venting to atmosphere through gas uptakes.
PROCESS DESIGN OF STEAM BOILERS (PROJECT STANDARDS AND SPECIFICATIONS) Page 3 of 45 Rev: 01 April 2011 SCOPE This Project Standards and Specifications is intended to cover minimum requirements for process design of field erected water tube boilers. REFERENCES Throughout this Standard the following dated and undated standards/codes are referred to.
Water Tube Water tube boilers have a heating surface that consists of a large number of relatively small-diameter tubes that contain the water. The heat is applied to the external side of the tubes. Other Other unlisted technology types. Search Logic:
Special features of water tube boiler: Water tube boilers have the high evaporating capacity (20,000 to 40,000 kg/h) compared with other boilers. The operating pressure lies between 11.5 to 17.5 bar. The draft losses are minimum. The defective tubes in water tube boilers can be identified and replaced easily.