Power Station Energy Saving Boiler Spare Parts Superheater Coils
HRSG Boiler Superheater and Reheater Desuperheater system ASME Standard Chinese Manufacturer
Superheating system Superheater Coi
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Superheater is a part of a boiler that heats the steam from the saturation temperature to the overheating temperature. It is also called a steam superheater.Superheater can be divided into convective type, radial type and semi-radial type according to heat transfer mode;According to the characteristics of the structure, it can be divided into serpentine pipe type, screen type, wall type and wall type.They are made up of parallel pipes and inlet and outlet manifold.
Most industrial boilers do not have superheaters because many industrial processes and living facilities require only saturated steam.In power stations, locomotives and Marine boilers, superheater is usually installed to improve the circulating thermal efficiency of the whole steam power plant.
Desuperheating syste
- Three major systems are adopted the world over: the injection type, the flue gas flow diverting type, and the burner tilt. The last two are adopted for reheater steam temperature control. The first one is adopted for superheater temperature control.
- It also used in reheaters during emergencies when there is a need to quench the temperature even after reaching the maximum of control on the normal system adopted.
- The material selection for the superheater before the injection will be greatly influenced by the quantity of injection.
Functions and characteristics of superheaters and reheaters
functions of superheaters and reheaters:
Superheaters and reheaters are important parts for the heating surfaces, used to increase steam temperature, aiming to improve steam enthalpy and further to increase the thermal circulation efficiency for power station.
Superheaters work to heat surnatured steam to superheated steam with a certain tempetature. When boiler loads or other working conditions change, it is necessary to make sure superheated steam temperature to be normal, and within allowable range of temperature variation.
From the thermal circulation in power station, the original parameters of pressure and temperature is higher, the thermal efficiency of circulation is better, or the steam humidity of the steam turbine rear is too high, influencing its safety. While the superheaer steam temperature is limited by metal materials, at present, due to limitation of metal materials, superheated temperature for most power station boilers are still within the range of 540-555 dgrees, and to avoid the steam humidity of blade of steam turbine rear too big, thus middle reheating system is applied.
What are the differences of Superheater And Reheater?
| Type | Advantages | Disadvantages | Supporting method |
| Pendant-type | 1.Firm structural support | 1. Flow blockage by condensed steam 2. Needs a slow restart to purge the water that accumulates in the bottom. | supported from above |
| Inverted-type | 1.Proper drainage of the condensed steam | 1. Lack the structural rigidity, especially in high speed gas flow | Supported from below |
| Horizontal -type | 1. Proper drainage 2. Good structural rigidity. | 1. They do not view the flam directly so they are mainly from the convective type | Usually supported in the vertical gas ducts parallel to the main furnace.
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Details
| Setting Information |
| process | welding |
| structure | horizontal or vertical |
| material | carbon steel, alloy steel |
| tubes | φ32, 38, 42, etc. |
| size | customized |
| brand | HTEG |
| Warranty | 18 months
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Design structure
1. heating saturated steam, temperature up to 900 degree C.
2. high efficiency, >90%.
3. high speed heating.
4. design with stainless steel.
5. long design service life, 15 years.
Send us required technical data, such as steam capacity, presure, required temperature etc. We will design accordingly.
HD Boiler offers a best in class facility
For over 30years, Hua Dong Boiler has been consistently innovating and improving our boiler superheaters and reheaters.The improvements in bending,welding and design ensure our products meet both Euorpean and American standards, ensuring a relabile performance.
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ASME Grade A Power Station Energy Saving Boiler Spare Parts Reheater Coil Images
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