Heat exchange tube fixing and supporting device

Abstract

The utility model relates to a heat exchange tube fixing and supporting device which is characterized in that a supporting unit comprises a plurality of rings which are arranged in a concentric circle mode, every two concentric adjacent rings are connected through rib plates which are arranged in the radial direction, and one ends of the rib plates which are evenly distributed in the circumferential direction are fixed to the outer circumferential face of the ring on the inner side. The other ends of the rib plates are fixed to the inner circumferential face of the ring on the outer side, sleeves are evenly distributed on the outer circumferential face of the ring on the inner side in every two adjacent rings, the sleeves are separated from the ring on the adjacent outer side, and heat exchange pipes are inserted into the sleeves in a one-to-one correspondence and penetrating mode. The ring, the rib plate and the sleeve are adopted in the supporting unit of the heat exchange pipe, the arrangement mode is reasonable, the structure is simple, medium circulation is free of resistance, air pressure difference cannot be formed, in the same section, the rib plate occupies small space, the space outside the sleeve can allow media to pass through without resistance, a gap is reserved between the sleeve and the heat exchange pipe in a sleeving mode, the heat exchange pipe is heated to deform, stress can be released, and the service life of the heat exchange pipe is prolonged. And overall vibration of the equipment cannot be generated.

Description

Technical Field

[0001] The utility model relates to the technical field of conversion furnaces, in particular to a heat exchange tube fixing and supporting device. Background Art

[0002] The shift converter is a core and necessary equipment in the carbon monoxide production section of a synthetic ammonia plant. Usually, heat exchange tubes are set in the catalytic chamber, and cooling water is used to take away the heat of the catalyst layer, thereby reducing the temperature of the catalyst layer and ensuring the safe and stable operation of the shift converter. The common heat exchange tube support structure on the market has the following problems: it is only applicable to the range of heat exchangers, not to the range of reactor heat transfer technology, the support structure blocks the flow of gas, resulting in a large pressure difference during equipment operation, the heat exchange tube is prone to vibration, there is a dead zone for medium flow, and it is difficult to insert the heat exchange tube during manufacturing. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a heat exchange tube fixing support device to solve the problem that the reaction airflow outside the heat exchange tube in the conversion furnace is not smooth and the heat exchange tube is easy to vibrate.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A heat exchange tube fixing support device comprises a plurality of support units which are arranged in a spaced relationship from one end to the other end of the heat exchange tube along the axial direction. The support units comprise a plurality of rings which are arranged in concentric circles on the same plane. Each ring is perpendicular to the axial direction of the heat exchange tube. Two concentric adjacent rings are connected by ribs which are arranged in a radial direction. One end of the ribs which are evenly distributed on the circumference is fixed on the outer circumferential surface of the inner ring, and the other end of the ribs is fixed on the inner circumferential surface of the outer ring. Sleeves are evenly distributed on the outer circumferential surface of the inner ring of two adjacent rings. The sleeves are spaced from the adjacent outer rings, and heat exchange tubes are inserted through the sleeves in a one-to-one correspondence.

[0006] As a preferred embodiment, the two adjacent innermost rings of the support unit are connected by a rib plate, and no sleeve is arranged between the two adjacent innermost rings.

[0007] As a preferred embodiment, no rib is provided between two adjacent outermost rings of the support unit, and the opposite parts of the two adjacent outermost rings are fixedly connected to the two sides of the sleeve.

[0008] As a preferred embodiment, a rib plate is provided between every two sleeves on the same circumference in the support unit.

[0009] As a preferred embodiment, the length of the weld between any sleeve and the ring is smaller than the axial length of the sleeve, and the weld is located in the middle of the sleeve.

[0010] The beneficial effects of the utility model are as follows: the support unit of the heat exchange tube adopts a ring, a rib plate and a sleeve, the arrangement method is reasonable, the structure is simple, the medium flows without resistance, and no pressure difference is formed. In the same cross section, the space occupied by the rib plate is small, and the space outside the sleeve can be used for the medium to pass without resistance. A gap is reserved between the sleeve and the heat exchange tube sleeve, and the heat exchange tube can release stress when deformed by heat, and the overall vibration of the equipment will not be generated. There will be no gas dead zone between the support units in the reaction gas flow. The sleeve is first sleeved on the outside of the heat exchange tube. When threading the tube, it is installed layer by layer from the inside to the outside. After the support is threaded on a layer of heat exchange tube, the sleeve is fixed, and then the next layer of tube is threaded. Therefore, the positioning of the tube threading is convenient, and there will be no difficulty in threading the tube when the sleeve and the heat exchange tube are installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the innermost layer of the ring of the utility model;

[0014] Figure 3 It is a schematic diagram of the middle part of the ring of the utility model;

[0015] Figure 4 This is a schematic diagram of the outermost layer of the ring of the utility model;

[0016] Figure 5 for Figure 1 A magnified view of the local area A;

[0017] Figure 6 is a cross-sectional view of the casing;

[0018] Figure 1 to Figure 6 Explanation of the reference numerals in the accompanying drawings: 1, ring; 11, weld; 2, casing; 3, rib plate; 4, heat exchange tube. DETAILED DESCRIPTION

[0019] The specific implementation scheme of the utility model is described in detail below in conjunction with the accompanying drawings.

[0020] like Figure 1 to Figure 6The heat exchange tube fixing support device shown comprises a plurality of support units arranged from one end to the other end along the axial direction of the heat exchange tube 4, the support unit comprises a plurality of concentrically arranged rings 1 on the same plane, each ring 1 is perpendicular to the axial direction of the heat exchange tube 4, two concentric adjacent rings 1 are connected by a radially arranged rib plate 3, one end of the circumferentially uniformly distributed rib plate 3 is fixed on the outer circumferential surface of the inner ring 1, and the other end of the rib plate 3 is fixed on the inner circumferential surface of the outer ring 1, and the outer circumferential surface of the inner ring 1 of the two adjacent rings 1 is uniformly distributed with a sleeve 2, the sleeve 2 is separated from the adjacent outer ring 1, and the heat exchange tube 4 is inserted into the sleeve 2 in a one-to-one correspondence. Among them, the innermost two adjacent rings 1 of the support unit are connected by the rib plate 3, and the sleeve 2 is not arranged between the innermost two adjacent rings 1. The outermost two adjacent rings 1 of the support unit are not arranged with a rib plate 3, and the opposite part of the outermost two adjacent rings 1 is fixedly connected to the two sides of the sleeve 2. A rib plate 3 is provided between every two sleeves 2 on the same circumference in the support unit. The length of the weld 11 between any sleeve 2 and the ring 1 is less than the axial length of the sleeve 2, and the weld is located in the middle of the sleeve 2, reducing the thermal effect of welding on the heat exchange tube 4 in the sleeve 2.

[0021] Specifically, the sleeves 2 on the circumference of the same ring 1 are evenly distributed on the circumference, and each heat exchange tube 4 is correspondingly inserted into each sleeve 2, so that the heat exchange tubes 4 are arranged in concentric circles. According to process calculations, the distance between the heat exchange tubes 4 on the same circumference is consistent, and the spacing between the heat exchange tubes 4 on different circumferences tends to gradually decrease from the inner layer to the outer layer. The heat exchange tubes 4 are arranged in the conversion furnace, and a reaction gas flow passes through the outside of the heat exchange tubes 4 in the conversion furnace. Most of the heat generated during the reaction is absorbed and taken away by the heat exchange tubes 4, so that the equipment can operate safely. The distance between the heat exchange tubes 4 is as large as possible while meeting the support weight, so that it is not easy to be blocked and stuck when the catalyst is placed, thereby affecting the filling and unloading of the catalyst.

[0022] During assembly, first weld the rib plate 3 to connect the two adjacent rings 1. When welding the corresponding sleeve 2, first install the single movable sleeve 2 on the heat exchange tube 4, and then weld the sleeve 2 on the outer circumference of the corresponding ring 1. In this way, it is installed layer by layer from the inside to the outside while welding, and there is no need to strictly control the problem of being unable to center when threading the pipe. It is easy to operate. After completing the positioning and installation, the overall structure has high strength and good stability. There are multiple support units distributed at intervals along the axial direction of the bundled heat exchange tube 4. When the reaction gas flow passes through the support unit of the heat exchange tube 4, it is smooth and unobstructed, and there will be no pressure difference due to the change in the direction of the gas flow. The heat exchange tube 4 will not vibrate. The medium can easily pass through the support unit of the heat exchange tube 4 without accumulation, which well protects the life of the heat exchange tube 4. Within the pipe circumference of each heat exchange tube 4, the heat exchange tube 4 is evenly arranged. The support gap between each circle of heat exchange tubes 4 meets the requirements of gas flow and catalyst reaction. The support gap between the heat exchange tubes 4 does not affect the functions of loading and unloading of the catalyst.

[0023] The working process of the utility model is as follows:

[0024] As shown in Figures 1-6, first, the two inner rings 1 are welded and fixedly connected by the rib plate 3, and at the same time, each independent heat exchange tube 4 is sleeved with a sleeve 2, and then, the heat exchange tubes 4 are vertically distributed on the outer circumference of the current outermost ring 1, and the sleeve 2 on each heat exchange tube 4 is welded to the ring 1. Finally, the support unit and the heat exchange tube 4 are combined together layer by layer from the inside to the outside.

[0025] The above embodiments are only illustrative of the principles and effects of the invention of the utility model, as well as some embodiments of its application, and are not intended to limit the invention of the utility model. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A heat exchange tube fixing support device, characterized in that: The invention comprises a plurality of support units which are arranged in a distance from one end to the other end along the axial direction of a heat exchange tube (4), wherein the support units comprise a plurality of rings (1) arranged in concentric circles on the same plane, wherein each ring (1) is perpendicular to the axial direction of the heat exchange tube (4), and two concentric adjacent rings (1) are connected via a rib plate (3) which is arranged in a radial direction, wherein one end of the rib plate (3) which is evenly distributed on the circumference is fixed to the outer circumferential surface of the inner ring (1), and the other end of the rib plate (3) is fixed to the inner circumferential surface of the outer ring (1), and sleeves (2) are evenly distributed on the outer circumferential surface of the inner ring (1) of the two adjacent rings (1), wherein the sleeves (2) are separated from the adjacent outer rings (1), and heat exchange tubes (4) are inserted through the sleeves (2) in a one-to-one correspondence.

2. The heat exchange tube fixing support device according to claim 1, characterized in that: The two adjacent rings (1) in the innermost layer of the support unit are connected via a rib plate (3), and no sleeve (2) is arranged between the two adjacent rings (1) in the innermost layer.

3. The heat exchange tube fixing support device according to claim 1, characterized in that: No rib plate (3) is provided between two adjacent outermost rings (1) of the support unit, and the opposite parts of the two adjacent outermost rings (1) are fixedly connected to the two sides of the sleeve (2).

4. The heat exchange tube fixing support device according to claim 1, characterized in that: A rib plate (3) is provided between every two sleeves (2) on the same circumference in the support unit.

5. The heat exchange tube fixing support device according to claim 1, characterized in that: The length of the weld (11) between any sleeve (2) and the ring (1) is less than the axial length of the sleeve (2), and the weld is located in the middle of the sleeve (2).

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