H fin bundle economizer seamless tube waste heat hot water boiler spare parts

H Finned Tube Economizer

1. The Economizer is a device installed in the lower part of the flue of the boiler to recover the waste heat of the exhausted flue gas, and the boiler feed water is heated to the heated surface of the saturated water under the steam drum pressure, because it absorbs the heat from the high temperature flue gas, and cools down the exhaust gas temperature of the flue gas saves energy and improves efficiency, so it is called an economizer.

2.The steel tube type economizer is not limited by pressure and can be used as a boiling type, and is generally made of a carbon steel pipe having an outer diameter of 32 to 51 mm. Fins and ribs are sometimes added to the tube to improve heat transfer. The steel tube type economizer consists of horizontally arranged parallel elbow tubes(known as serpentine tubes).
Economizers are mainly used in industry, and are gradually becoming popular in agriculture and some related industries.

Classification

There are many ways to classify economizers, which can be classified as follows:
1. According to the degree of heating of the feed water: it can be divided into non-boiling type and boiling type.
2. According to the manufacturing materials: there are two kinds of cast iron and steel tube economizer. Non-boiling type economizers are mostly made of cast iron, but they are also made of steel pipes, while boiling type economizers can only be made of steel pipes. Cast iron economizers are mostly used in boilers with a pressure of ≤2.5MPa. If the pressure exceeds 2.5 MPa, an economizer made of steel pipe should be used.
3. According to the form of the device: there are two types of vertical and horizontal.
4. According to the relative flow direction of smoke exhaust and feed water: there are three types: downstream, countercurrent and hybrid.
5. According to the structure: light pipe economizer and fin type economizer. The fin type economizer includes: an H-type economizer (used more) and a spiral fin economizer.
6. According to the form of heat conduction: direct conduction and indirect conduction;
Direct conduction is to directly use the boiler exhaust gas to directly preheat the boiler water; indirect conduction is to indirectly preheat the boiler water through the heat conduction medium; after the 1990s, the indirect conduction technology developed rapidly in the country, and made great breakthroughs in technology, mainly with heat conduction. Oil technology patent and superconducting energy saving technology patent. Especially since the beginning of the 21st century, the aerospace super-thermal material technology has been at the forefront of the world's boiler energy-saving field.

Principle

1. H fin tube is a kind of boiler parts, to have two steel circular symmetry to be welded on fluorescent tubes to form fins positive shap much like letter "H", so called H-fin tube. H-economizer widely used in utility boilers, industrial boilers, marine power, such as the tail of heat exchanger components.
2. H-economizer two rectangular fin, similar to a square, its edge length for the fluorescent tubes of 2-fold, an expansion of the heating surface.
3. H-economizer flash resistance welding processes used, the welding seam after the high rate of fusion, weld tensile strength, and has good thermal conductivity. H-economizer can also manufacture dual tube "double H" type fin tubes, its rigid structure, and can be applied to a longer tube row occasion.

Scope of H Finned Tube

Detailed Picture

    Dehai Boiler is a manufacturer of A-class boiler(Power station boiler,industrial boiler,HRSG,waste-to-energy boiler,biomass boiler) and correlated A-class pressure parts intergrating the design,fabrication,installation,repair and mainteance.

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