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Graphite longitudinal fin flue gas heat exchange tube and its manufacture method

A technology of graphite fins and heat exchange tubes, applied in the field of heat exchange equipment, can solve problems such as poor corrosion resistance, and achieve the effects of small equipment volume, low smoke resistance, and high heat exchange efficiency

Inactive Publication Date: 2008-09-10
SHANDONG BEICHEN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during use, it was found that due to the use of aluminum materials to make heat transfer tubes, the corrosion resistance is poor, and it is not suitable for users with various corrosive gases in the flue gas.

Method used

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  • Graphite longitudinal fin flue gas heat exchange tube and its manufacture method
  • Graphite longitudinal fin flue gas heat exchange tube and its manufacture method
  • Graphite longitudinal fin flue gas heat exchange tube and its manufacture method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, a flue gas heat exchange tube with graphite longitudinal fins, the heat exchange tube includes a tube body and a joint, and its structure is: the tube body is composed of a graphite inner tube 3 and graphite fins distributed longitudinally on the outer surface It is composed of sheet 4, and the two ends of the graphite inner tube are equipped with metal joints 1. The metal joint and the inner pipe are connected by threads, and there is an adhesive layer between the inner thread of the inner pipe and the outer thread of the metal joint.

Embodiment 2

[0021] Embodiment 2, a graphite longitudinal fin flue gas heat exchange tube, the heat exchange tube includes a tube body and a joint, and its structure is: the tube body is composed of a graphite inner tube 3 with a circular cross section and an outer surface Composed of graphite fins 4 distributed longitudinally, the inner tube of the pipe body and the fins distributed longitudinally along the outer surface are extruded with a mold in a special extruder heated internally and externally, and the specific steps are:

[0022] a. Modulate graphite raw material,

[0023] b. Put the raw materials into the special extruder and extrude them into shape,

[0024] c. Drying and curing.

[0025] The special equipment used in the manufacturing method of the graphite longitudinal finned flue gas heat exchange tube includes an outer heating layer 7, an insulating layer 6, a mold 11, and an inner mold 9, wherein an inner heating layer 10 is housed in the tube of the tubular inner mold. Af...

Embodiment 3

[0026] Embodiment 3, a graphite longitudinal fin flue gas heat exchange tube, the heat exchange tube includes a tube body and a joint, and its structure is: the tube body is composed of a graphite inner tube 3 with a circular cross section and an outer surface It consists of graphite fins 4 distributed longitudinally, and metal joints 1 are installed at both ends of the graphite inner tube. The metal joint and the inner pipe are connected by threads, and there is an adhesive layer between the inner thread of the inner pipe and the outer thread of the metal joint, and the inner surface of the graphite inner pipe has longitudinal ribs 5 . Such as figure 1 and Figure 4 shown.

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Abstract

The invention discloses a graphite vertical fin flue gas heat exchange tube and a production method thereof, and in particular relates to an element of a common heat exchange or transmission device and a production method thereof, belonging to the heat exchange device. The heat exchange tube comprises a tube body and a connector, and is characterized in that the tube body consists of graphite fins which are distributed lengthways on the inner graphite tube and the outside surface, the two ends of the inner graphite tube are provided with metal connectors. The heat exchange tube is made of graphite and the two ends are provided with metal connectors, the graphite is the nonmetal material with the best thermal conductivity which is about twice of the raw steel material and has good anticorrosion performance and the metal connectors solve the problem of connecting a tube or a box; therefore, the heat exchange device assembled by the graphite vertical fin flue gas heat exchange tube has the advantages of high heat exchange efficiency, corrosion resistance, small flue gas resistance force, great circulation area of the cross section, small volume of the device, low possibility of the accumulation of ash and scale, small necessary fan power, low electricity consumption and convenient maintenance, etc.

Description

Technical field [0001] The invention belongs to a heat exchange device, in particular to a component of a general heat exchange or heat transfer device and a manufacturing method thereof. Background technique [0002] Generally known flue gas heat exchange devices commonly used in desulfurization projects use water as the heat transfer medium in the heat exchange tubes. In order to enhance the heat transfer on the flue gas side and make the heat exchange device compact in structure, it is usually outside the heat exchange tube bundle Fins are installed and staggered arrangement is adopted. The disadvantage of this flue gas heat exchange device is that the flue gas side resistance is relatively large, it is easy to accumulate dust and block, and the structure is not compact, resulting in relatively high equipment costs and operating costs. CN2682368 discloses a longitudinal fin tube flue gas heat exchange device capable of cooling or heating flue gas in boiler tail gas desulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F1/20F28F21/02
Inventor 李本远毛文邦叶龙
Owner SHANDONG BEICHEN GROUP
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