Zhangjiagang HuaDong Boiler Co., Ltd.
Zhangjiagang HuaDong Boiler Co., Ltd.
Add to Cart
Biomass Steam Boiler Economizer Boiler Grate Accessories 2.5m High Pressure Economizer Tube
Functions of Boiler Economizer
1.absorb the heat of low temperature flue-gas to reduce the temperature,fuel saving.
2.Feed water is heated in econimizer before entering the evaporating heating surface,it's reduce heat absorbed of water in evaporating heating surface.Therefore,cheapr economizer surface can replace some of expensive evaporating surface,more economically.
3.Increase the temperature of water before entering steam drum,reduce temperature difference between feed water and steam drum.Thus,the thermal stress of steam drum is reduced and entend service life.
Details of Boiler Economizer
| 1 | Economizers must be sized for the volume of flue gas, its temperature, the maximum pressure drop allowed through the stack, what kind of fuel is used in the boiler, and how much energy needs to be recovered. |
| 2 | Economizers designed for natural gas only, would likely plug-up if installed on a coal boiler and would face increased risk of corrosion if installed on an oil-fired boiler. |
| 3 | Some units are designed to keep the flue gases above condensation temperature, and others are made of materials that resist the corrosive effect of condensed flue gases.
|
Product Description of Boiler Economizer
Economizer is a mechanical device intended to reduce energy consumption, or to perform another useful function like preheating a fluid. The economizer is used for other purposes as well boiler, powerplant, and heating, ventilating, and air-conditionin(HVAC) uses are discussed in this article. In simple terms, an economizer is a heat exchanger.
Specification: Specification: Economizer in 500MW super-critical boilers to be exported to the U. S. A.
Application:
In boilers, economizers are heat exchange devices that heat fluids, usually water, up to but not normally beyond the boiling point of that fluid. Economizers are so named because they can make use of the enthalpy in fluid streams that are hot, but not hot enough to be used in a boiler, thereby recovering more useful enthalpy and improving the boiler's efficiency. They are a device fitted to a boiler which saves energy by using the exhaust gases from the boiler to preheat the cold water used to fill it (the feed water).
When you purchase a thermal fluid heater, the cost of fuel to operate the heater is a major concern. The amount of fuel needed is related to the thermal efficiency of the heater. Increasing its thermal efficiency reduces the amount of fuel needed as well as operating costs.
An effective way to increase a heater’s thermal efficiency and reduce fuel costs is to install a special heat exchanger in the heater’s exhaust stack. The heat exchanger recovers heat from the exhaust stack that would otherwise be lost into the atmosphere.
This special type of heat exchanger is known generically as an economizer or convection section. It consists of an enclosure that contains coils of pipe, and the enclosure fits between the heater and the bottom of the exhaust stack.
| 1 | Economizers are mechanical devices intended to reduce energy consumption, or to perform useful function such as preheating a fluid. |
| 2 | The term economizer is used for other purposes as well. Boiler, power plant, heating, Refrigeration, ventilating, and air conditioning (HVAC) uses are discussed in this article. |
| 3 | In simple terms, an economizer is a heat exchanger.The economizer has advanced manufacturing technology, strict production technology, detection means, with high-tech snake-like tube production lines. |
Parameter of Boiler Economizer
| Name(unit) | Specification(mm) |
| Bare pipe(OD) | 25-165 |
| Bare pipe(Thickness) | 2-8 |
| Fin (Thickness) | 0.6-3.0 |
| Fin (Height) | 5-30 |
| Fin tube thread pitch | 5-30 |
| Fin tube length | ≤12000 |
*Note:HD BOILER can bespoke special type of economizer according to customer's requirement.
Application of Boiler Economizer
| 1 | During boiler operation in typical commercial and industrial applications, approximately 10-20% of the heating value of fuel is expelled with the stack gases to the atmosphere. |
| 2 | Stack economizers are designed to recover significant amounts of this stack gas energy loss, thereby vastly improving boiler system efficiency. |
| 3 | There are several considerations when selecting an economizer |
| 4 | Gas-side Pressure Drop. Added back-pressure on the boiler stack affects the combustion air fan throughput capability. The economizer and combustion air fan(s) must be sized properly in order to assure a suitable system operation and capacity. |
| 5 | Feedwater Temperature. The feedwater to the economizer must be deaerated and the temperature setpoint minimally at 220oF to prevent tube corrosion. |
| 6 | Water-side Pressure Drop. Feedwater pumps must be sized to accommodate the economizer pressure drop. Additionally, a continuous modulating feedwater system is required to ensure proper flow rates through the economizer. |
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. |
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.
• Fabrication area of 400,000 square meters
• 150 Engineers
• 600 Coded welders
• 60 Licensed Inspectors(NDT Level-III instructors)
• Class-A Licenses for Design and Manufacture Boiler
• ISO 9001:2008 Quality System
• ASME Certificate of Power Boilers
• ASME 'S','U' and NB stamp authorization