Heat exchange tube supporting structure of coiled tube high-pressure heater

Abstract

The utility model discloses a heat exchange tube supporting structure of a coiled tube high-pressure heater. The heat exchange tube supporting structure comprises a plurality of rows of heat exchange tubes, a middle hook plate is arranged between every two adjacent rows of heat exchange pipes, and outer hook plates are arranged on the outer sides of the two rows of heat exchange pipes located on the edge. A plurality of folded plates are fixedly arranged on the two side surfaces of the middle hook plate at intervals, and the folded plates on the two side surfaces are arranged in a staggered manner; a plurality of folded plates are fixedly arranged on the side faces, adjacent to the heat exchange tubes, of the outer hook plates at intervals, and the folded plates of the outer hook plates and the folded plates on the adjacent side faces of the adjacent middle hook plates are arranged in a staggered mode. The plurality of folded plates on each side surface are inserted between the two heat exchange tubes of the adjacent row of heat exchange tubes or are arranged on the outer sides of the two heat exchange tubes on the edge in the adjacent row of heat exchange tubes; the utility model can effectively avoid the problem of ultrahigh assembly of the tube bundle, is simple to install and easy to operate in the assembly process, has good support strength, can effectively reduce the vibration risk of the heat exchange tube in the operation process, and ensures the longitudinal flow heat exchange effect of the tube bundle.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heat exchange pipe support structure, especially a heat exchange pipe support structure of serpentine tube high pressure heater. BACKGROUND

[0002] The serpentine tube high pressure heater is used for high parameter and large capacity unit, and can adapt to frequent start and sharp load change of the unit. The serpentine tube high pressure heater is generally composed of a superheating section, a saturation section and a desuperheating section. The steam flow rate of the shell side of the superheating section is large, and the temperature is high. If the traditional baffle heat exchange structure is used, the problems of large pressure loss and easy erosion and damage of the heat exchange tube caused by too high steam flow rate will be faced. The longitudinal flow heat exchange can solve the problem well. However, the heat exchange tube of the serpentine tube high pressure heater is not a straight tube structure, and cannot be assembled in the form of a preassembled integral support device. The support device for realizing longitudinal flow of the heat exchange tube of the existing serpentine tube high pressure heater is as follows:

[0003] (1) a special V-shaped pressing strip is used. However, the manufacturing difficulty is large, and the precision requirement is high. Since the arrangement of the serpentine tube is relatively compact, the problem of excessive height caused by cumulative tube bundle assembly error is prone to occur.

[0004] (2) a steel strip structure is used. Two rows of rectangular folded plates are arranged on the steel strip in a staggered manner. The rectangular folded plates are inserted between the adjacent two heat exchange tubes. The one-way arrangement of the rectangular folded plates has the problems of low support strength and poor anti-tube bundle vibration effect.

[0005] The above problems are difficult to guarantee the longitudinal flow heat exchange effect of the tube bundle during operation. SUMMARY

[0006] The utility model aims at the above-mentioned defects of the prior art, and provides a heat exchange tube support structure of serpentine tube high pressure heater. The heat exchange tube support structure can effectively avoid the problem of excessive height of the tube bundle assembly, and has simple installation and easy operation during assembly. In addition, the heat exchange tube support structure has good support strength, can effectively reduce the vibration risk of the heat exchange tube during operation, and guarantees the longitudinal flow heat exchange effect of the tube bundle.

[0007] In order to achieve the above-mentioned purpose, the heat exchange tube support structure of the serpentine tube high pressure heater comprises a plurality of rows of heat exchange tubes. Characterized in that: intermediate hook plates are arranged between the adjacent two rows of heat exchange tubes. The outer sides of the two rows of heat exchange tubes located at the edges are each provided with an outer hook plate. A plurality of folded plates are fixedly arranged on the two side surfaces of the intermediate hook plate in a staggered manner in the length direction. A plurality of folded plates are fixedly arranged on the side surface of the heat exchange tube adjacent to the outer hook plate in a staggered manner in the length direction. The plurality of folded plates of the outer hook plate are arranged on the side surface of the heat exchange tube adjacent to the outer hook plate in a staggered manner in the length direction. The plurality of folded plates on each side surface are inserted between the two heat exchange tubes of the adjacent row of heat exchange tubes or arranged on the outer sides of the two heat exchange tubes located at the edges in the adjacent row of heat exchange tubes. Each heat exchange tube is clamped between the two folded plates on different side surfaces.

[0008] The utility model discloses when assembling, set up a row of heat exchange pipes on the outer hook plate, then lay a middle hook plate, and each heat exchange pipe is clamped between two flaps on different sides, and the next row of heat exchange pipes is continued to assemble after the heat exchange pipe is pressed flat by the middle hook plate, and the above operation is repeated until the heat exchange pipe assembly is completed, the manufacturing difficulty of each hook plate is low, and the precision is high, can effectively avoid the problem of the tube bundle assembly overheight, and the assembly process is simple to install and easy to operate, the flaps on different sides are staggered, the overall support stability of the hook plate to the heat exchange pipe is higher, has good support strength, can effectively reduce the vibration risk of the heat exchange pipe in the operation process, and guarantees the tube bundle longitudinal flow heat exchange effect.

[0009] As a further improvement of the utility model, the height of each flap is not less than half of the outer diameter of the heat exchange pipe, realizing the line contact of the flap and the heat exchange pipe, preventing the vibration risk, and improving the tube bundle longitudinal flow heat exchange effect.

[0010] As a further improvement of the utility model, each flap is a trapezoidal flap, and the flaps on the same side are arranged in a single row, the single row arrangement can increase the width of the trapezoidal flap, thereby increasing the support strength of the hook plate.

[0011] In summary, the utility model can effectively avoid the problem of the tube bundle assembly overheight, and the assembly process is simple to install and easy to operate, has good support strength, can effectively reduce the vibration risk of the heat exchange pipe in the operation process, and guarantees the tube bundle longitudinal flow heat exchange effect. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the front view of the utility model embodiment.

[0013] Figure 2 It is the front view of the middle hook plate of Figure 1 .

[0014] Figure 3 It is the plan view of Figure 2 . DETAILED DESCRIPTION

[0015] The utility model will be further explained in connection with the drawings.

[0016] As Figures 1 to 3As shown, the heat exchange tube support structure of the serpentine tube high-pressure heater of the embodiment comprises a plurality of rows of heat exchange tubes 1 (only three rows are shown in the figure) ; an intermediate hook plate 2 is arranged between every two adjacent rows of heat exchange tubes 1, and the outer side of the two rows of heat exchange tubes 1 located at the edge is provided with an outer hook plate 3; a plurality of trapezoidal flaps 4 or 5 are integrally and fixedly arranged on the two side surfaces of the intermediate hook plate 2 at intervals, and the plurality of trapezoidal flaps 4 and 5 on the two side surfaces are staggered in the length direction; a plurality of trapezoidal flaps 6 are integrally and fixedly arranged on the side surface adjacent to the heat exchange tube 1 of the outer hook plate 3 at intervals, and the plurality of trapezoidal flaps 6 on the outer hook plate 3 are staggered in the length direction with the plurality of trapezoidal flaps 5 on the adjacent side surface of the intermediate hook plate 2; the plurality of trapezoidal flaps 4 or 5 or 6 on the same side surface are arranged in a single row; the plurality of trapezoidal flaps 4 or 5 or 6 on each side surface are inserted between the two heat exchange tubes of the adjacent row of heat exchange tubes 1 or arranged on the outer side of the two heat exchange tubes 7 located at the edge in the adjacent row of heat exchange tubes 1, and each heat exchange tube is clamped between the two trapezoidal flaps 4 and 5 or the two trapezoidal flaps 5 and 6 on different side surfaces, and the heights of the trapezoidal flaps 4, 5 and 6 are not less than half of the outer diameter of the heat exchange tube 1.

[0017] The heights of the trapezoidal flaps 4, 5 and 6 in the utility model are formed by stamping and flanging; when assembling, after arranging a row of heat exchange tubes 1 on an outer hook plate 3, a middle hook plate 2 is laid, each heat exchange tube 1 is clamped between the two trapezoidal flaps 5 and 6 on different side surfaces, the heat exchange tube 1 is flattened by the middle hook plate 2, and then the next row of heat exchange tubes is assembled, and the above operation is repeated until the heat exchange tube assembly is completed, thereby forming an integral support structure; the manufacturing difficulty of each hook plate 2 and 3 is low and the precision is high, which can effectively avoid the problem of over-high tube bundle assembly; and the assembly process is simple to install and easy to operate; the trapezoidal flaps 4 and 5 or 5 and 6 on different side surfaces are arranged in a staggered manner, each heat exchange tube is clamped between the two trapezoidal flaps 4 and 5 or the two trapezoidal flaps 5 and 6 on different side surfaces, so that the overall support stability of the hook plate to the heat exchange tube is higher, has good support strength, can effectively reduce the vibration risk of the heat exchange tube in the running process, and ensures the longitudinal flow heat exchange effect of the tube bundle;

[0018] The heights of the trapezoidal flaps 4-6 are not less than half of the outer diameter of the heat exchange tube 1, which can realize linear contact between the flaps and the heat exchange tube 1, prevent vibration risk, and improve the longitudinal flow heat exchange effect of the tube bundle; single-row arrangement can increase the width of the trapezoidal flaps, thereby increasing the support strength of the hook plate;

[0019] The above embodiment is described, but it should be understood that the above embodiment is only for the purpose of example and illustration, and is not intended to limit the utility model to the described embodiment.

Claims

1. A heat exchanging tube support structure of a serpentine tube high pressure heater comprising a plurality of rows of heat exchanging tubes; characterized in that: Intermediate hook plates are arranged between two adjacent rows of heat exchange pipes, and outer hook plates are arranged outside the two heat exchange pipes at the edge; a plurality of flaps are fixedly arranged on the two side faces of the intermediate hook plate at intervals, and the flaps on the two side faces are staggered in the length direction; a plurality of flaps are fixedly arranged on the side face adjacent to the heat exchange pipe of the outer hook plate at intervals, and the flaps on the outer hook plate are staggered with the flaps on the side face of the adjacent intermediate hook plate in the length direction; the flaps on each side face are inserted between two heat exchange pipes of an adjacent row of heat exchange pipes or are arranged outside the two heat exchange pipes at the edge of an adjacent row of heat exchange pipes, and each heat exchange pipe is clamped between two flaps on different side faces.

2. A heat exchanger tube support structure for a high pressure heater of a serpentine tube type according to claim 1, characterized in that: The height of each flap is not less than half of the outer diameter of the heat exchange pipe.

3. A heat exchanger tube support structure for a high pressure heater of a serpentine tube type according to claim 1 or 2, characterized in that: Each flap is a trapezoidal flap, and the flaps on the same side face are arranged in a single row.

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