CN213984694U

CN213984694U - Sleeve type heat exchanger

Info

Publication number: CN213984694U
Application number: CN202022780991.3U
Authority: CN
Inventors: 李超; 段有龙; 曲斌; 于涛; 曹培城
Original assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Current assignee: Acre Coking and Refractory Engineering Consulting Corp MCC
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-08-17
Anticipated expiration: 2030-11-26

Abstract

The utility model relates to a heat exchanger especially relates to a double pipe heat exchanger. Comprises a straight pipe section and a connecting section; the straight pipe section and the connecting section respectively comprise an inner cylinder body, a spiral sheet, an outer cylinder body, a medium inlet, a medium outlet and a flange, the medium inlet, the medium outlet and the flange are fixedly connected onto the outer cylinder body, the spiral sheet is fixedly connected onto the inner cylinder body, and the inner cylinder body is arranged in the outer cylinder body; the outer cylinder body and the inner cylinder body of the connecting section are provided with the same 0-360-degree bend, and the straight pipe section is connected with the connecting section, the connecting section is connected with the connecting section, and the straight pipe section is connected with the straight pipe section through flanges. The inner cylinder body is additionally provided with the spiral sheet, so that a shell pass medium is in a spiral flowing state, the heat transfer coefficient of a shell pass is improved, the heat exchange area is increased, and a supporting effect is achieved. The two ends of the outer cylinder are directly welded with the flanges, so that the unheated area is reduced, and the heat exchange area is increased. The straight pipe section and the connecting section can be combined randomly, and the heat exchange area is increased.

Description

Sleeve type heat exchanger

Technical Field

The utility model relates to a heat exchanger especially relates to a double pipe heat exchanger.

Background

The double-pipe heat exchanger is a heat exchanger which is most widely applied in petrochemical production at present, and when the material viscosity is high and uniform heating is required but local overheating is not allowed, a double-pipe heater is generally selected. The casing heater consists of casing, U-shaped elbow, stuffing box, etc. the required pipes may be made of common carbon steel, cast iron, copper, titanium, ceramic glass, etc. and are fixed onto the support. Two different media can flow in the tube in opposite directions (or in the same direction) to achieve the purpose of heat exchange, when the heat exchange is carried out in the opposite direction, hot fluid enters from the upper part, cold fluid enters from the lower part, and heat is transferred to the other fluid from one fluid through the wall of the inner tube.

The prior casing heat exchanger has no spiral sheet between the inner cylinder and the outer cylinder, and has low heat efficiency; the end part is welded by adopting a pipe cap, and an unheated area is arranged between the end part and the end flange, so that heat exchange is influenced; usually, the connecting pipe only has an inner cylinder connecting flange.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a can improve heat exchange efficiency's double pipe heat exchanger.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a double-pipe heat exchanger comprises a straight pipe section and a connecting section; the straight pipe section and the connecting section respectively comprise an inner cylinder body, a spiral sheet, an outer cylinder body, a medium inlet, a medium outlet and a flange, the medium inlet, the medium outlet and the flange are fixedly connected onto the outer cylinder body, the spiral sheet is fixedly connected onto the inner cylinder body, and the inner cylinder body is arranged in the outer cylinder body; the outer cylinder body and the inner cylinder body of the connecting section are provided with the same 0-360-degree bend, and the straight pipe section is connected with the connecting section, the connecting section is connected with the connecting section, and the straight pipe section is connected with the straight pipe section through flanges.

The flanges are fixedly connected to two ends of the outer cylinder, the medium inlet and the medium outlet are fixedly connected to the cylinder wall of the outer cylinder, and the medium inlet and the medium outlet are close to the flanges.

The flange is a jacket flange.

The expansion joint is further included, and the outer cylinder body of the straight pipe section is connected with the expansion joint.

The number of the straight pipe sections and the number of the connecting sections are one or more, and the straight pipe sections are connected with the straight pipe sections, the straight pipe sections are connected with the connecting sections or the connecting sections are connected with the connecting sections.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the inner cylinder body is additionally provided with the spiral sheet, so that a shell pass medium is in a spiral flowing state, the heat transfer coefficient of a shell pass is improved, the heat exchange area is increased, and a supporting effect is achieved.

2. The two ends of the outer cylinder are directly welded with the flanges, so that the unheated area is reduced, and the heat exchange area is increased.

3. The straight pipe section and the connecting section can be combined randomly, and the heat exchange area is increased.

Drawings

FIG. 1 is a schematic structural view of a straight pipe section of the present invention;

fig. 2 is a schematic structural view of the connection section (bent at 90 °) of the present invention;

fig. 3 is the structure diagram of the connection section (bent to 180 °) of the present invention.

In the figure: 1-inner cylinder 2-spiral slice 3-outer cylinder 4-flange 5-medium inlet 6-medium outlet

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

example (b):

as shown in fig. 1 to 3, a double pipe heat exchanger includes a straight pipe section and a connection section. The number of the straight pipe sections and the number of the connecting sections are one or more, the straight pipe sections are connected with the straight pipe sections, the straight pipe sections are connected with the connecting sections or the connecting sections are connected with the connecting sections. The two mediums of the straight pipe section and the connecting section are in countercurrent contact. The straight pipe section and the connecting section can be combined in any combination.

As shown in fig. 1, the straight pipe section includes an inner cylinder 1, a spiral piece 2, an outer cylinder 3, a medium inlet 5, a medium outlet 6 and a flange 4. The helical fin 2 is welded on the inner cylinder body 1, the helical fin 2 improves the heat transfer coefficient, increases the heat exchange area and plays a supporting role. The medium inlet 5 and the medium outlet 6 are welded on the wall of the outer cylinder 3 and positioned at two ends of the outer cylinder 3, the outer cylinder 3 is assembled on the inner cylinder 1, and two ends are butted with the flange 4. The flange 4 is a sleeve flange. The outer cylinder 3 can be added with an expansion joint when the medium temperature is high.

As shown in fig. 2, the connection section includes an inner cylinder 1, a spiral piece 2, an outer cylinder 3, a medium inlet 5, a medium outlet 6, and a flange 4. The inner cylinder body 1 is made of a 90-degree elbow, the spiral sheets 2 are welded on the inner cylinder body 1, the spiral sheets 2 improve the heat transfer coefficient, the heat exchange area is increased, and the supporting effect is achieved. The medium inlet 5 and the medium outlet 6 are welded on the wall of the outer cylinder 3 and positioned at two ends of the outer cylinder 3, the outer cylinder 3 is assembled on the inner cylinder 1 after being sliced and cut and then welded, and two ends are welded with the flange 4.

As shown in fig. 3, the connection section includes an inner cylinder 1, a spiral piece 2, an outer cylinder 3, a medium inlet 5, a medium outlet 6, and a flange 4. The inner cylinder body 1 is made of 180-degree elbows, the spiral sheets 2 are welded on the inner cylinder body 1, the spiral sheets 2 improve the heat transfer coefficient, the heat exchange area is increased, and the supporting effect is achieved. The medium inlet 5 and the medium outlet 6 are welded on the wall of the outer cylinder 3 and positioned at two ends of the outer cylinder 3, the outer cylinder 3 is assembled on the inner cylinder 1 after being sliced and cut and then welded, and two ends are welded with the flange 4.

The utility model discloses interior barrel 1 increases flight 2, makes the shell side medium realize spiral helicine mobile state, improves the coefficient of heat transfer of shell side, increases heat transfer area, plays the supporting role. Two ends of the outer cylinder 3 are directly welded with the flanges 4, so that the unheated area is reduced, and the heat exchange area is increased. The straight pipe section and the connecting section can be combined randomly, and the heat exchange area is increased.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A double pipe heat exchanger characterized in that: comprises a straight pipe section and a connecting section; the straight pipe section and the connecting section respectively comprise an inner cylinder body, a spiral sheet, an outer cylinder body, a medium inlet, a medium outlet and a flange, the medium inlet, the medium outlet and the flange are fixedly connected onto the outer cylinder body, the spiral sheet is fixedly connected onto the inner cylinder body, and the inner cylinder body is arranged in the outer cylinder body; the outer cylinder body and the inner cylinder body of the connecting section are provided with the same 0-360-degree bend, and the straight pipe section is connected with the connecting section, the connecting section is connected with the connecting section, and the straight pipe section is connected with the straight pipe section through flanges.

2. A double pipe heat exchanger according to claim 1, wherein: the flanges are fixedly connected to two ends of the outer cylinder, the medium inlet and the medium outlet are fixedly connected to the cylinder wall of the outer cylinder, and the medium inlet and the medium outlet are close to the flanges.

3. A double pipe heat exchanger according to claim 1, wherein: the flange is a jacket flange.

4. A double pipe heat exchanger according to claim 1, wherein: the expansion joint is further included, and the outer cylinder body of the straight pipe section is connected with the expansion joint.

5. A double pipe heat exchanger according to claim 1, wherein: the number of the straight pipe sections and the number of the connecting sections are one or more, and the straight pipe sections are connected with the straight pipe sections, the straight pipe sections are connected with the connecting sections or the connecting sections are connected with the connecting sections.