Audited Supplier
Steam Superheater Coils in Power Plant Chemical and Operations With ASME Standard
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.
| 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. |
Superheating system Superheater Coil
- Superheaters in large capacity boilers are of both convective and radiant type.
- The convective type superheaters are placed in the second pass of the boiler, and these are also called low temperature super heaters. Generally about a 40 to 60 degree centigrade temperature pick up takes place on the steam side in this superheater.
- The steam from this moves to a radiant type superheater called the panel or platen superheater, and about a 70 to 100 degree centigrade pickup take place there.
- This is followed by the final superheater, and the remaining required temperature is picked up here. One has to understand that the designer can vary the pickup pattern depending upon his way of practice or requirement.
- But in all the methods adopted, the final temperature must be within a narrow range generally plus / minus five degrees centigrade. The superheaters are so surfaced that, for the design fuel of the boiler, there will not be any desuperheating requirement.
Quality Control
1. Impact test and Strength calculation report with applied materials information.
2. 100%NDT(non-destructive inspection) report of steel plate, tube and electrode.
3. X-ray, γ-ray and liquid penetrant test inspection report (welding seam): to ensure the quality of the entire boiler.
4. Hydraulic test report: ensure the standard working pressure and safety.
Packaging & Shipping
·For special cargos, such as overlength, overwidth, overheight and overweight cargos, we will choose frame boxes for easy handling.
·For regular goods, we prefer ordinary containers.
·After loading the goods, we will reinforce them in all aspects.
Zhangjiagang Hua Dong Boiler Co., Ltd.,
founded in 1985, is an enterprise specializing in manufacturing power station boilers, industrial boilers, HRSGs, waste incineration boilers, biomass boilers and related heating surface components in China. Hua Dong Boiler provides clients with integrated services from design, manufacturing to installation and maintenance.
Complete quality assurance and control system which certified according to the International Quality Standard.
Establish a quality assurance system faithfully in compliance with the national regulations, standards and other technical requirements. The quality of process and products is 100% under control. Ensured all the products are manufactured faithfully in accordance with the contract requirements, national regulations and standards by stringent inspection and test over materials and products during manufacturing.
Global Sales
FAQ
Q1: How long is the warranty period?
Q2: How can we guarantee quality?
1) All machines are in strict accordance with the ISO quality and CE system requirements.
2) Each procedure is crafted by professional Skilled labour, followed by particular QC
3) All information of our products can be checked in efficient management system.
Q3: What can you buy from us?
CFB Boiler, HRSG Boiler, Boiler Economizer, Boiler Fin tube, Boiler Air preheater, Boiler superheater, Boiler membrane wall,
Boiler manifold headers and other pressure spare parts.
Q4: What kind of service do you provide?
Before sales:
Provide productinformations, market research forecasting, product customization,product processing,consultation and other services for your convenience.
After sales:
1. Technical training on according to customer requirements;
2. We promise replacement under warranty;
3. We promise to supply the maintenance spare parts;
4. Regular call back or visit customers;
5. On time response to mail and phone calls of your complaints or consultation.
Accepted Delivery Terms: FOB, CFR, CIF, EXW, FCA;
Accepted Payment Currency: USD, CNY;
Accepted Payment Type: T/T, L/C, MoneyGram, Western Union, Cash;
Language Spoken:English,Chinese
We are a factory, just 130km(2 hours by car) away from Shanghai Airport.
