China Supplier Boiler Fittings Super heater low temperature superheater
Superheater Tube Coils Description
1. Using superheated steam can reduce the moisture content in the exhaust steam of steam turbine.Depends on the boiler superheated steam temperature pressure, evaporation, steel and high temperature resistant performance and fuel price comparison of steel, for power plant boiler, boiler in general is about 450 ℃, 4 million mpa.
2. More than 10 million mpa boiler for 540 ~ 570 ℃.A handful of power station boiler also have higher superheat steam temperature (or even up to 650 ℃).
Boiler Superheater Structural character
1. The waste heat boiler is outdoor horizontal smoke tube boiler and is composed of boiler shell and inlet & outlet smoke box. Gas is diverted by inlet smoke box and washes smoke tube in vertical direction and finally converges and flows out from outlet smoke box.
2. In order to avoid a direct wash to front tube sheet by high-heat gas, a refractory protection is cast on the surface of front tube sheet and a refractory protective tube is installed on the inlet of the smoke tube.
3. Steam space is located on the upper part of boiler shell smoke tube, and a wire mesh demister is installed on the steam outlet for steam-water separation.
4. The whole waste heat boiler is supported by two saddles; one along the direction of the gas flow is fixed support and is fixed on the foundation by eight anchor bolts, others are sliding supports.
1. Superheating raises overall efficiency as well as avoids too much condensation in last stages of turbine which avoids blade erosion.
2. The heat of combustion gases from furnace is utilised for removal of moisture from steam and to superheat the steam.
3. Super-heaters ususlly have several tube circuits in parallel with one or more return bends,connected between headers.
4. Heat from the hot gases to the vapour in the surperheater is transferred at high temperatures.
5. Therefore promary section of superheater is arranged in counterflow and secondary section in parallel flow to reduce the temp.stressing of the tube wall.
Carbon steel,stainless steel,alloy steel
Carbon steel, alloy steel or heat-resistant steel, collection boxes and other supporting material. Tubes are customized types of specifications.