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A bent 3-point spiral baffle heat exchanger

A technology of helical baffles and baffles, applied in indirect heat exchangers, heat exchanger types, heat exchanger shells, etc., can solve the problems of many plates, increased difficulty and workload in processing and assembly, etc. Achieve the effect of improving comprehensive performance, orderly fluid flow, and alleviating leakage problems

Active Publication Date: 2020-06-16
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason is that the 6 equally divided spiral baffles use too many plates at the same axial distance, which greatly increases the difficulty and workload for processing and assembly.

Method used

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  • A bent 3-point spiral baffle heat exchanger
  • A bent 3-point spiral baffle heat exchanger
  • A bent 3-point spiral baffle heat exchanger

Examples

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] As shown in Figure 1, a bent 3-point spiral baffle heat exchanger includes a spiral baffle body installed in the heat exchanger cylinder, a spiral baffle body installed on the spiral baffle body for axial Through the tube hole of the heat exchange tube, the helical baffle body has a bend in the spiral direction, where: Figure 1(a) is a schematic diagram of the size of the 3-point bent helical baffle: where L 1 , L 2 is the distance from the two ends of the bending baffle to the bend, h is the height of the axial baffle, S 2 is the distance between the two ends of the baffle. Figure 1(b) is a schematic diagram of the size of the traditional three-point spiral baffle: where α is the helix angle, L is the distance between the two ends of the baffle in the direction of the cross-section of the heat exchanger cylinder, and S 1 is the distance bet...

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Abstract

The invention discloses a bent trisection spiral baffle plate heat exchanger. A bending angle is added in the middle of each spiral baffle plate body on the basis of a conventional trisection spiral baffle plate, and therefore each spiral baffle plate body is more similar to a hex-section spiral baffle plate, and the structure can have the advantages of the conventional trisection spiral baffle plate and a conventional hex-section spiral baffle plate heat exchanger. The bent trisection spiral baffle plate heat exchanger comprises a cylindrical body, the spiral baffle plate bodies and pipe holes. The spiral baffle plate bodies are installed in the cylindrical body of the heat exchanger, and the pipe holes are formed in the spiral baffle plate bodies and used for allowing heat exchange pipesto pass through in the axial direction. Bends are arranged on the spiral baffle plate bodies in the spiral direction, each baffle plate body is divided by the corresponding bent portion into a portion A and a portion B, and the spiral angle of each baffle plate body in the circumferential direction of the cylindrical body is 120 degrees. By the adoption of the bent trisection spiral baffle plateheat exchanger, the total heat transfer coefficient of the heat exchanger can be effectively increased, the inlet and outlet pressure drop of the heat exchanger can be reduced, the flow leakage regionand the dead region inside the cylindrical body can be improved, and the overall performance of the heat exchanger can be improved.

Description

technical field [0001] The invention belongs to the technical field of shell-and-tube type spiral baffle heat exchangers, and relates to a bent three-point spiral baffle heat exchanger. Background technique [0002] Spiral baffle heat exchanger is a kind of shell-and-tube heat exchanger, which is mainly used in pharmaceutical, petroleum, chemical, shipbuilding, central heating, refrigeration and air conditioning, machinery, metallurgy, electric power, food and other fields. At present, the 2-4 equal-section spiral baffle heat exchanger is widely used in engineering, because the 2-4 equal-section spiral baffle is easy to install inside the heat exchanger cylinder, and the installation required The number of flow plates is within a controllable range. [0003] At present, the structural optimization of most baffles mostly adopts the "blocking" method. For example, some scholars use insert plates to block the leakage area. Studies have shown that this spiral baffle has better...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D7/16F28F9/22
CPCF28D7/1607F28F9/22F28F2009/224
Inventor 张宏柴大利梁栋高业会李陈晨丁览
Owner DALIAN UNIV OF TECH
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