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What is the use temperature of the finned tube radiator related?

Release time:

Jul 04,2023

And fin material, such as fin material for aluminum, melting point is 660 ℃. Therefore, the steel-aluminum composite finned tube is not suitable for the heat exchange system of high temperature flue gas. Considering that the high-temperature flue gas has sulfur components, the finned tube radiator uses ND steel, and the fin type uses high-frequency spiral finned tubes.

1, and fin material, such as fin material is aluminum, the melting point is 660 ℃. Therefore, the steel-aluminum composite finned tube is not suitable for the heat exchange system of high temperature flue gas. Considering that the high-temperature flue gas has sulfur components, the finned tube radiator uses ND steel, and the fin type uses high-frequency spiral finned tubes.

2, and processing technology. For example, the steel-aluminum composite finned tube starts to be reflected at 210 ℃, while the ordinary finned tube wound around the steel sheet starts from about 150 ℃, and its contact thermal resistance curve shows an obvious upward trend.

3. In general, there is little influence on the wall thickness of the base pipe. The normal wall thickness of ordinary seamless steel pipe, its pressure capacity is relatively high, the wall thickness of the steel pipe is certain, with the increase of the diameter of the steel pipe, the pressure capacity decreased.

4. It is related to the design strength of tube plate and tube box. The thicker the wall thickness of the tube sheet and tube box, the higher the pressure bearing capacity of the finned tube radiator.

5, and welding process related. The pores, slag inclusions, incomplete penetration, cracks, etc. generated during welding all affect the pressure-bearing capacity of the finned tube radiator, and the pressure and temperature are generally proportional.

Focus on hot spots

Characteristics and application fields of high frequency welding finned tube radiator

The base tube and the fin are firmly welded, the contact thermal resistance is small, the sheet distance is uniform, the wrinkle is small, it is not easy to accumulate dust, and the heat exchange efficiency is greatly improved. It is widely used in the waste heat recovery of heating furnaces, boilers, kilns, hot air furnaces and drying towers. Compared with traditional wound-tube air coolers, the outstanding advantages of high-frequency welded finned tube radiators are large heat dissipation area and cooling capacity. High, low air resistance, and its performance remains basically unchanged with the increase of service life.

How to buy SRZ finned tube radiator

The base tube of the traditional SRZ finned tube radiator is generally Φ 21*2 stainless steel or carbon steel tube, the height of the strip steel used for winding the sheet is 15mm, and the sheet distance is 5-8mm. The thickness of the sheet is generally 0.23-0.38mm.

Advantages of spiral high frequency welding finned tube

As a commonly used heat exchange element, high frequency welding finned tube needs to work for a long time under high temperature flue gas environment. For example, finned tubes used in boiler heat exchangers are used in harsh environments, high temperature and pressure, and corrosive environments. High-frequency welded finned tubes should have high-performance indicators, mainly including: corrosion resistance, wear resistance, low contact thermal resistance, high stability and anti-fouling ability.

Advantages of finned tube radiators

The finned tube radiator is not easy to ash. The cause of dust accumulation is the Karman vortex gap. Ash deposition will affect the flow of steam in the pipeline, and then affect the heat transfer efficiency of steam. After hot-dip galvanizing, the gap of the heat pipe is reduced, and it is not easy to form a dust accumulation angle, which affects the heat transfer efficiency. The integral finned tube radiator has stable performance and long service life. The thermal test has stable heat transfer performance and is suitable for various drying chambers and large and medium heating systems. The heat transfer efficiency is high, the corrosion resistance of the entire hot-dip galvanized layer is improved, and the service life is extended.

How to choose the material of finned tube radiator

The choice of finned tube radiator material determines the life of the heat exchanger and the cost of the equipment. When we choose the material according to the working conditions, we can choose the radiator with high cost performance, thereby reducing the production cost of the enterprise.