High Efficiency Boiler Parts Superheater And Reheater ASME Standard
Product Details
| Application: | Power Station And Industry | Fuel Of Boiler: | Coal/Gas/Coal-fired/Water Heat |
|---|---|---|---|
| Keyword: | Boiler Superheater Tube | Packing: | Seaworthy Packing |
| Product Name: | Superheater Tube | Surface Treatment: | Painted |
| Highlight |
convection superheater,superheater in boiler |
||
Product Description
Hight Efficiency Superheater&Reheater Boiler Parts,Utility/Power Station Plant Using,ASME Standard
Product Description
A super-heater is a device used to convert saturated steam or wet steam into superheated steam or dry steam. It is used in power stations. Super-heaters are used in steam engines or in processes, such as steam reforming. There are three types of super-heaters: radiant, convection, and separately fired. A super-heater can vary in size from a few tens of feet to several hundred feet (a few meters to some hundred meters).
Re-heaters are the same as the super-heaters but as their exit temperature is a little bit less than super-heaters and their pressure is 20%-25% less than the super-heater, they can stand less quality material alloys.
Details
• Superheating raises overall efficiency as well as avoids too much condensation in last stages of turbine which avoids blade erosion.
• The heat of combustion gases from furnace is utilised for removal of moisture from steam and to superheat the steam.
• Super-heaters ususlly have several tube circuits in parallel with one or more return bends,connected between headers.
• Heat from the hot gases to the vapour in the surperheater is transferred at high temperatures.
• Therefore promary section of superheater is arranged in counterflow and secondary section in parallel flow to reduce the temp.stressing of the tube wall.
Differences
| Type | Advantages | Disadvantages | Supporting method |
| Pendant-type | 1.Firm structural support | 1. Flow blockage by condensed steam 2. Needs 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. |
Manufacturing and acceptance criteria
JB/T1611 " Technical specification for manufacturing of boiler pipes."
JB/T1612 "boiler pressure test technical conditions. "
JB/T1613 "Technical specification for welding of pressure parts of boiler."
JB/T1615"Technical specification for painting and packing of boiler."
JB/T3375 "Rules for receiving acceptance of materials for boiler construction."
Functions
The functions of superheater as below:
1. The dry saturated steam drum to further make the superheated steam heating. When the soda coexist, the soda heating the mixture, add heat can only be used to make soda water evaporate into steam in the mixture, and cannot make steam temperature of superheated steam. To get to the superheated steam, the commonly used method is to steam separated from the mixture of soda, for its further heating, accomplish this task components become the superheater.
2.reduce the temperature of flue gas, recover the heat in the flue gas, improve boiler efficiency.
Reheater is a kind of steam superheater that reheats the low-pressure steam that has done work and reaches a certain temperature. The role of reheater further improves the thermal efficiency of power plant circulation, and makes the steam temperature of the final stage blade of steam turbine controlled within the allowable range.
1, the role of the reheater, is to do some work in the steam turbine high-pressure cylinder steam, back to the boiler for reheating.Then it is sent back to the middle and low pressure cylinders of the turbine to continue the work.
2. Meet the parameters of reheater installation: in order to improve the cycle efficiency of the unit, only increase the steam pressure and not increase the temperature, will make the steam turbine exhaust humidity is too high, affecting the safety of the steam turbine.Further increase of steam temperature is limited by the high temperature characteristics and cost of steel.Using reheat cycle, the useful enthalpy drop of steam in steam turbine increases, which can further improve the cycle efficiency (primary reheat can improve the cycle efficiency by 4%-6%, secondary reheat can increase by about 2%), in addition, the exhaust humidity can be significantly reduced.
Certifications
Company Introduction
Established in 1985,Zhangjiagang Hua Dong Boiler Co.,Ltd.(trading as HD Boiler),produces power plant; industrial; waste heat; waste incineration; biomass; organic heat carrier and electric steam boilers. Coupled with a comprehensive range of heating surfaces, HD Boiler brings to the market a unique service including boiler design , fabrication, installation, maintenance and replacement of boiler pressure parts.
1. Fabrication area of 200,000 square meters
2. 150 Engineers
3. 600 Coded welders
4. 60 Licensed Inspectors(NDT Level-III instructors)
5. Class-A Licenses for Design and Manufacture Boiler
6. ISO 9001:2008 Quality System
7. ASME Certificate of Power Boilers
8. ASME 'S','U' and NB stamp authorization
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Hight Efficiency Superheater&Reheater Boiler Parts,Utility/Power Station Plant Using,ASME Standard Product Description A super-heater is a device used to convert saturated steam or wet steam into superheated steam or dry steam. It is used in power stations. Super-heaters are used in steam engines or ...
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