CN222578283U - Gas-liquid tube heat exchanger - Google Patents

Abstract

The utility model discloses a gas-liquid tube type heat exchanger, which comprises a shell, wherein a smoke inlet is formed in the upper side of the shell, a smoke outlet is formed in the lower side of the shell, a plurality of groups of heat exchange tubes are sequentially arranged in the shell at intervals along the smoke flowing direction, an expansion joint is arranged on one side surface of the shell, adjacent heat exchange tubes are connected through bends, the bends are respectively arranged on the outer side of the shell, and the outermost ends of the heat exchange tubes are respectively connected with two headers. The gas-liquid tube type heat exchanger is simple in structure, easy to observe and convenient to maintain, has strong applicability in the gas-liquid tube type heat exchanger, is provided with the expansion joint, avoids weld cracking caused by displacement generated by the thermal expansion of the heat exchange tube, ensures the tightness of the weld joint and ensures the product quality.

Description

Gas-liquid tube type heat exchanger

Technical Field

The utility model belongs to the technical field of heat exchangers, and particularly relates to a gas-liquid tube type heat exchanger.

Background

The gas-liquid tube heat exchanger has very wide application in industrial production, such as superheaters and economizers of boiler equipment in industry, air heaters in drying and drying systems, air preheaters in garbage incineration power generation, and heat exchangers in steel-making, steel-rolling and galvanized sheet production processes are all application examples of gas-liquid tube heat exchangers. In the production process of the petrochemical industry, the application of heat exchangers is even more countless.

Therefore, the importance of the gas-liquid tube heat exchanger in industry is seen, the tube heat exchanger commonly used in the market, the elbow and the header pipe are wrapped on the inner side of the cover plate, and the heat pipe and the elbow are often leaked at the welding seam position in the using process of the equipment.

Disclosure of utility model

The utility model aims to provide a gas-liquid tube type heat exchanger so as to solve the problems in the background art.

In order to achieve the purpose, the utility model provides the technical scheme that the gas-liquid tube type heat exchanger comprises a shell, wherein a smoke inlet is formed in the upper side of the shell, a smoke outlet is formed in the lower side of the shell, a plurality of groups of heat exchange tubes are sequentially arranged in the shell along the smoke flowing direction at intervals, an expansion joint is arranged on one side face of the shell, adjacent heat exchange tubes are connected through elbows, the elbows are respectively arranged on the outer side of the shell, and the outermost ends of the heat exchange tubes are respectively connected with two headers.

Preferably, a front tube plate and a rear tube plate are arranged on the shell, the rear tube plate is connected with the expansion joint, and the heat exchange tubes penetrate through the front tube plate and the rear tube plate.

Preferably, the heat exchange tube is a fin heat exchange tube.

Preferably, the elbow is a U-shaped elbow.

Preferably, the two headers are connected to the liquid inlet and the liquid outlet, respectively.

Preferably, the shell is provided with C-shaped steel.

Preferably, the expansion joint is a U-shaped expansion corrugated pipe.

The gas-liquid tube type heat exchanger has the technical effects and advantages that the structure is simple, the observation is easy, the maintenance is convenient, the gas-liquid tube type heat exchanger has strong applicability, and the expansion joint is arranged, so that the cracking of welding seams caused by displacement generated by the thermal expansion of the heat exchange tube is avoided, the tightness of the welding seams is ensured, and the product quality is ensured.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic side view of the present utility model;

Fig. 3 is a schematic top view of the present utility model.

In the figure, 1, a front tube plate, 2, a smoke inlet, 3, a smoke outlet, 4, a rear tube plate, 5, an expansion joint, 6, a heat exchange tube, 7, an elbow, 8, a header, 9 and C-shaped steel.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

The utility model provides a gas-liquid tube type heat exchanger as shown in figures 1-3, which comprises a shell, wherein C-shaped steel 9 is welded at the edge of the shell, the strength of the shell can be increased, the shell is a channel which is penetrated up and down, a flue gas inlet 2 is arranged at the upper side of the shell, a flue gas outlet 3 is arranged at the lower side of the shell, a front tube plate 1 is arranged at the left side of the shell, a rear tube plate 4 is connected with the right side of the shell through an expansion joint 5, heat exchange tubes 6 penetrate through the front tube plate 1 and the rear tube plate 4 and are welded and span the shell, a plurality of groups of heat exchange tubes 6 are sequentially arranged in the shell along the flue gas flowing direction at intervals, the heat exchange tubes 6 are fin heat exchange tubes, adjacent heat exchange tubes 6 are connected through elbows 7, the elbows 7 are U-shaped elbows, a cover plate is not arranged at the outer sides of the elbows 7, the observation and the maintenance are facilitated, the elbows 7 are respectively arranged at the outer sides of the shell, the outermost ends of the heat exchange tubes 6 are respectively connected with two headers 8, the two headers 8 are respectively connected with a liquid inlet and a liquid outlet, and a liquid inlet are discharged from the liquid outlet.

In the using process of the gas-liquid tube type heat exchanger, when the heat exchange tube 6 is heated, thermal expansion exists, and the expansion joint 5 on the rear tube plate 4 absorbs displacement generated by the thermal expansion, so that the weld joint is prevented from being pulled apart after the heat exchange tube 6 is heated.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (7)

1. A gas-liquid tube type heat exchanger comprises a shell and is characterized in that a smoke inlet (2) is formed in the upper side of the shell, a smoke outlet (3) is formed in the lower side of the shell, a plurality of groups of heat exchange tubes (6) are sequentially arranged in the shell along the smoke flowing direction at intervals, an expansion joint (5) is arranged on one side face of the shell, adjacent heat exchange tubes (6) are connected through elbows (7), the elbows (7) are respectively arranged on the outer side of the shell, and the outermost ends of the heat exchange tubes (6) are respectively connected with two headers (8).

2. A gas-liquid tube heat exchanger according to claim 1 wherein the shell is provided with a front tube plate (1) and a rear tube plate (4), the rear tube plate (4) is connected with an expansion joint (5), and the heat exchange tubes (6) penetrate through the front tube plate (1) and the rear tube plate (4).

3. A gas-liquid tube heat exchanger according to claim 1 wherein the heat exchange tube (6) is a fin heat exchange tube.

4. A gas-liquid tube heat exchanger according to claim 1 wherein the elbow (7) is a U-bend.

5. A gas-liquid tube heat exchanger according to claim 1, wherein two header tanks (8) are connected to the liquid inlet and the liquid outlet, respectively.

6. A gas-liquid tube heat exchanger according to claim 1 wherein the housing is provided with C-section steel (9).

7. A gas-liquid tube heat exchanger according to claim 1 wherein the expansion joint (5) is a U-shaped expansion bellows.