Customized Nickel Base Superheater And Reheater With Shield,High Efficient Heat Exchange Part
Product description of Superheater and Reheater
Superheater
Fossil fuel power plants often have a superheater section in the steam generating furnace.The steam passes through drying equipment inside the steam drum on to the superheater, a set of tubes in the furnace. Here the steam picks up more energy from hot flue gases outside the tubing, and its temperature is now superheated above the saturation temperature.
Reheater
Power plant furnaces may have a reheater section containing tubes heated by hot flue gases outside the tubes. Exhaust steam from the high-pressure turbine is passed through these heated tubes to collect more energy before driving the intermediate and then low-pressure turbines.
Product Functions of Superheater and Reheater
Superheater
1.The function of the superheater in the thermal power plant is to remove the last traces of moisture ( 1 to 2%) from the saturated steam coming out of boiler and to increase its temperature sufficiently above saturation temperature.
2.The super-heating heating raises overall overall cycle efficiency efficiency as well as avoids too much condensation in the last stages of the turbine which avoids the blade erosion.
3.The heat of combustion gases from furnace is utilized for the removal of moisture from steam and to superheat the steam.
4.Super-heaters usually have several tube circuits in parallel with one or more return bends, connected between headers.
Reheater
1.The function of the re-heaters is to resuperheat the partly expanded steam from the turbine.
This is done so that the steam remains dry as far as possible through the last stage of the turbine.
2.Location: Before or after the convective superheater in the convective zone of utility boilers. In modern high pressure boilers, reheaters are generally in two sections.
3.The primary section is placed in the convective zone and secondary section is placed just at the furnace exit hanging from the top.
4.The design consideration for reheaters are similar to those for superheaters.
5.It having same output temperatures but steam pressures are about 20-25% of those in superheaters. Hence lower grade steel alloy can be used for reheaters.
Type Advantages Disadvantages Supporting method
Pendant-type
1.Firm structural support
2. Flow blockage by condensed steam
3. Needs slow restart to purge the water that accumulates in the bottom. supported from above
Inverted-type
1.Proper drainage of the condensed steam
2. Lack the structural rigidity, especially in high speed gas flow Supported from below
Horizontal -type
1. Proper drainage
2. Good structural rigidity.
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.
Details of Superheater and Reheater
| 1 | Material composition | Carbon steel, alloy steel or heat-resistant steel, collection boxes and other supporting material. Tubes are customized types of specifications. |
| 2 | Design pattern | Vertical or horizontal layout. |
| 3 | Advantages | Beautiful appearance, size, accuracy, first-class bending and welding technology, first-class detection equipment. |
Manufacturing and acceptance criteria of Superheater and Reheater
1.JB/T1611 " Technical specification for manufacturing of boiler pipes."
2.JB/T1612 "boiler pressure test technical conditions. "
3.JB/T1613 "Technical specification for welding of pressure parts of boiler."
4.JB/T1615"Technical specification for painting and packing of boiler."
5. JB/T3375 "Rules for receiving acceptance of materials for boiler construction."
Product Display
Product Tags:
|
|
Customized Nickel Base Superheater And Reheater Heat Exchange Part With Shield Images
|
