CN202442614U - Bushing type heat exchanger - Google Patents

Abstract

The utility model relates to a bushing type heat exchanger, which comprises a heat exchange tube, wherein the heat exchange tube consists of an inner tube and an outer tube; the inner tube and the outer tube are concentric to each other; the tube wall of the inner tube faces outwards to form arc-shaped edges; the arc-shaped edges are uniformly formed along the circumferential direction of the inner tube; an arc-shaped recess is formed between two adjacent arc-shaped edges; the arc-shaped edges and the arc-shaped recesses extend along the axial direction; and heat exchange sheets are arranged on the arc-shaped recesses along the axial direction. The arc-shaped edges are formed on the tube wall of the inner tube, so that a cavity between the outer tube and the inner tube is occupied more by the tube wall of the inner tube, the heat exchanging area between the outer tube and the inner wall is increased, and the heat exchanging efficiency is increased.

Description

Tube heat exchanger

technical field

The utility model belongs to a heat exchanger for heat exchange in the petrochemical industry, in particular to a casing heat exchanger.

Background technique

Heat exchanger is a widely used heat exchange equipment in the petrochemical industry. The casing heat exchanger is a concentric casing made of straight pipes with different diameters and connected by U-shaped elbows. At present, this type of heat exchange In the device, as shown in Figure 1, the heat exchange tube, that is, the concentric sleeve tube, is formed by inner and outer tubes, the inner tube is a circular tube, and the outer tube is also a circular tube. When exchanging heat, one fluid flows through the inner tube, and the other An annular cavity in which fluid travels between the inner and outer tubes. During the heat exchange process of this casing-type heat exchanger, the heat exchange area between the outer tube and the inner tube is only the tube wall of the inner tube, thereby affecting the heat exchange efficiency.

Contents of the invention

The purpose of the utility model is to provide a casing heat exchanger, which is used to solve the problem of low heat exchange efficiency of the existing casing heat exchanger.

The technical scheme adopted by the utility model to solve the technical problem is: the casing heat exchanger includes a heat exchange tube, the heat exchange tube is composed of an inner tube and an outer tube, the inner tube and the outer tube are concentric, and the tube wall of the inner tube Arc-shaped ribs are formed outward, and the arc-shaped ribs are evenly arranged along the circumferential direction of the inner tube. There is an arc-shaped depression between two adjacent arc-shaped ribs. The arc-shaped rib and the arc-shaped depression extend along the axial direction, and the arc-shaped Heat exchange fins are arranged in the depression along the axial direction.

There are six arc ribs in the above-mentioned scheme.

Beneficial effect:

1. The arc edge formed on the tube wall of the inner tube in the utility model makes the tube wall of the inner tube occupy more of the cavity between the outer tube and the inner tube, increasing the gap between the outer tube and the inner tube. The heat exchange area improves the heat exchange efficiency.

2. The heat exchange fins in the utility model also increase the heat exchange area between the inner tube and the outer tube, which further improves the heat exchange efficiency.

3. The utility model has a simple structure and can be widely used in the petrochemical industry.

Description of drawings

Fig. 1 is the structural representation of existing casing heat exchanger;

Fig. 2 is a structural representation of the utility model;

Fig. 3 is a schematic diagram of the structure of the inner tube in the utility model.

1 Inner tube 2 Outer tube 3 Heat exchange fins 4 Arc edge.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 2, this casing heat exchanger includes heat exchange tubes, the heat exchange tubes are composed of a coaxial inner tube 1 and an outer tube 2, the inner tube 1 and the outer tube 2 are concentric, and the tube wall of the inner tube 1 Arc-shaped ribs 4 are formed outwards, and there are six arc-shaped ribs 4. The arc-shaped ribs 4 are evenly arranged along the circumferential direction of the inner tube. There is an arc-shaped depression between two adjacent arc-shaped ribs 4. The arc-shaped ribs 4 and The arc-shaped depressions extend along the axial direction, the arc-shaped ribs 4 are arranged alternately with the arc-shaped depressions, and the arc-shaped depressions are provided with heat exchange fins 3 along the axial direction.

When the utility model is exchanging heat, the fluid in the inner tube 1 and the fluid flowing in the cavity between the inner tube 1 and the outer tube 2 can be fully absorbed at the arc-shaped edge 4 and the arc-shaped depression during the flow process. The heat exchange increases the heat exchange area, and the arrangement of the heat exchange fins 3 further increases the heat exchange area and further improves the heat exchange efficiency.

Claims (2)

1. A casing heat exchanger, characterized in that: the casing heat exchanger comprises a heat exchange tube, the heat exchange tube is composed of an inner tube (1) and an outer tube (2), and the inner tube (1) Concentric with the outer tube (2), the tube wall of the inner tube (1) forms an arc-shaped edge (4) outward, and the arc-shaped edge (4) is evenly arranged along the circumferential direction of the inner tube (1), and two adjacent arcs There are arc-shaped depressions between the shaped ribs (4), the arc-shaped ribs (4) and the arc-shaped depressions extend axially, and the arc-shaped depressions are provided with heat exchange fins (3) along the axial direction. 2. The tubular heat exchanger according to claim 1, characterized in that there are six arc-shaped ribs (4).

Images