CN210180235U

CN210180235U - Step diffusion heat exchange equipment

Info

Publication number: CN210180235U
Application number: CN201920408467.8U
Authority: CN
Inventors: Xiuyan Wang; 王秀艳; Haijun Yang; 杨海军
Original assignee: Tianjin Long Meijia Decoration Engineering Ltd Co
Current assignee: Shenyang Heske Heat Exchange Equipment Co ltd
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2020-03-24
Anticipated expiration: 2029-03-28

Abstract

The utility model provides a step diffusion indirect heating equipment, including the casing, be provided with refrigerant entry, refrigerant export, secondary refrigerant entry and secondary refrigerant export on the casing, be provided with a plurality of heat exchange tubes in the casing, all be provided with a plurality of disturbance strips along its axis on the heat exchange tube, the outer pipe wall, be provided with the disturbance step on the disturbance strip, along fluid flow direction, the disturbance step risees gradually. When the step diffusion heat exchange equipment works, the disturbance steps on the disturbance strips gradually rise along the flowing direction of the fluid, the fluid is cut by the disturbance steps with different heights on the disturbance strips when passing through the heat exchange tube, all-dimensional disturbance of the fluid along the radial direction and the circumferential direction of the heat exchange tube is formed, heat transfer is strengthened through enhanced disturbance, and the fluid can be fully subjected to heat exchange, so that the aim of improving the heat exchange efficiency of the heat exchanger is fulfilled.

Description

Step diffusion heat exchange equipment

Technical Field

The utility model relates to a heat exchanger field, concretely relates to step diffusion indirect heating equipment.

Background

The straight tube type shell-and-tube heat exchanger is characterized in that bundled heat exchange straight tubes are distributed in a shell, according to different working principles, or refrigerant flows through the straight tubes, secondary refrigerant flows through the shell, or the refrigerant flows through the shell, the secondary refrigerant flows through the straight tubes, and the refrigerant and the secondary refrigerant exchange heat in the flowing process to achieve the purpose of heat exchange. Due to the limited size, the sizes of the straight pipe and the shell can not be infinitely prolonged in the length direction in a specific working environment, so that the stay time of the refrigerant and the secondary refrigerant in the straight pipe or the shell is too short, and the sufficient heat exchange can not be carried out; meanwhile, due to layering in the fluid conveying process, heat exchange of fluid near the pipe wall of the straight pipe is obvious, heat exchange of fluid far away from the pipe wall of the straight pipe is poor, and heat exchange of the heat exchanger is uneven on the whole. Due to the reasons, the heat exchange efficiency of the existing straight tube type tube shell heat exchanger is low.

SUMMERY OF THE UTILITY MODEL

To the problem that current straight tube type tube heat exchanger exists, the utility model provides a step diffusion indirect heating equipment, this step diffusion indirect heating equipment's technical scheme is realized like this:

the step diffusion heat exchange equipment comprises a shell, wherein a refrigerant inlet, a refrigerant outlet, a secondary refrigerant inlet and a secondary refrigerant outlet are formed in the shell, a plurality of heat exchange tubes are arranged in the shell, a plurality of disturbance strips are arranged on the inner wall and the outer wall of each heat exchange tube along the axis of the heat exchange tube, disturbance steps are arranged on the disturbance strips, and the disturbance steps are gradually lifted along the flowing direction of a fluid.

Furthermore, the disturbance steps arranged on the disturbance strips gradually rise and then gradually fall along the flowing direction of the fluid.

Further, the number of the disturbance steps which gradually decrease is equal to the number of the disturbance steps which gradually increase.

Further, the gradually rising disturbance step has three steps.

Further, the disturbance bars are welded on the wall of the heat exchange tube.

Furthermore, a dovetail groove is formed in the tube wall of the heat exchange tube, and the disturbance strip is clamped in the dovetail groove.

Furthermore, in the shell, the arrangement angles of the disturbance strips on the two adjacent heat exchange tubes are different.

Furthermore, both ends of the shell are provided with tube plates, tube boxes are arranged outside the tube plates, and the heat exchange tubes are fixed between the tube plates.

The step diffusion heat exchange equipment has the advantages that when the step diffusion heat exchange equipment works, the disturbance steps on the disturbance strips are gradually raised along the flowing direction of a fluid, the fluid is cut by the disturbance steps with different heights on the disturbance strips when passing through the heat exchange tube, all-directional disturbance of the fluid along the radial direction and the circumferential direction of the heat exchange tube is formed, layering in the fluid conveying process is broken, the defects that the fluid close to the tube wall of the heat exchange tube is obvious in heat exchange effect and the fluid far away from the tube wall of the heat exchange tube is not obvious in heat exchange effect in the prior heat exchanger are overcome, heat transfer is strengthened through enhanced disturbance, the fluid can be fully subjected to heat exchange, and therefore the.

For a straight-tube heat exchange tube, if the heat exchange retention time of fluid in a heat exchanger needs to be prolonged, the purpose can be achieved only by arranging a corresponding flow-resisting structure, but the flow-resisting means that the flow velocity of the fluid is reduced, so that the loss of peripheral power equipment of the heat exchanger is increased and is not paid, and therefore, the step diffusion heat exchange equipment is not provided with the structure.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic structural diagram of a heat exchange tube in the stage diffusion heat exchange device;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic structural diagram of the stage diffusion heat exchange device.

Description of reference numerals:

in the figure: 1. the device comprises a shell, a heat exchange tube 2, a tube plate 3, a tube box 4, a refrigerant inlet 5, a refrigerant outlet 6, a secondary refrigerant inlet 7, a secondary refrigerant outlet 8, a disturbance strip 9 and a disturbance step 10.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Step diffusion indirect heating equipment, as shown in fig. 1 to 3, including casing 1, be provided with refrigerant entry 5, refrigerant export 6, secondary refrigerant entry 7 and secondary refrigerant export 8 on the casing 1, be provided with a plurality of heat exchange tubes 2 in the casing 1 particularly, casing 1 both ends all are provided with tube sheet 3, all are provided with pipe case 4 outside the tube sheet 3, and heat exchange tube 2 fixes between tube sheet 3. The inner pipe wall and the outer pipe wall of the heat exchange pipe 2 are respectively provided with a plurality of disturbance strips 9 along the axial line, disturbance steps 10 are arranged on the disturbance strips 9, and the disturbance steps 10 are gradually lifted along the flowing direction of the fluid.

This step diffusion indirect heating equipment, at the during operation, along the fluid flow direction, disturbance step 10 on the disturbance strip 9 risees gradually, the fluid is when passing through heat exchange tube 2, by the disturbance step 10 of co-altitude on the disturbance strip 9 cutting, form the radial and all-round disturbance of circumference along heat exchange tube 2 of fluid, break the layering in the fluid transfer process, when having overcome the heat exchanger heat transfer in the past, the fluid heat transfer effect that is close to heat exchange tube 2 pipe wall position is obvious, the shortcoming of the fluid heat transfer effect that keeps away from heat exchange tube 2 pipe wall position is obscure, through reinforcing disturbance, the heat transfer has been reinforceed, the fluid can obtain abundant heat exchange, thereby reached the purpose that improves heat exchanger heat exchange efficiency.

In the step diffusion heat exchange equipment, the disturbance steps 10 arranged on the disturbance strips 9 are gradually raised and then gradually lowered along the flowing direction of the fluid, the raised disturbance steps 10 can enhance the disturbance of the fluid, and the lowered disturbance steps 10 can also enhance the disturbance of the fluid by manufacturing a 'collapse area'.

In the step diffusion heat exchange equipment, the number of the gradually-reduced disturbance steps 10 is equal to the number of the gradually-increased disturbance steps 10.

In the present step diffusion heat exchange device, preferably, the gradually rising disturbance step 10 has three steps.

In the step diffusion heat exchange equipment, as a specific form, the disturbance strips 9 are welded on the pipe wall of the heat exchange pipe 2. In the step diffusion heat exchange equipment, as another specific form, a dovetail groove is formed in the pipe wall of the heat exchange pipe 2, the disturbance strip 9 is clamped in the dovetail groove, and box plates at two ends, used for fixing the heat exchange pipe 2, in the heat exchanger can limit the axial line sliding of the disturbance strip 9.

In the step diffusion heat exchange device, in the shell 1, the arrangement angles of the disturbance strips 9 on the two adjacent heat exchange tubes 2 are different, so that the disturbance of fluid can be further enhanced.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a step diffusion indirect heating equipment, includes casing (1), is provided with refrigerant entry (5), refrigerant export (6), secondary refrigerant entry (7) and secondary refrigerant export (8) on casing (1), is provided with a plurality of heat exchange tubes (2) in casing (1), its characterized in that: a plurality of disturbance strips (9) are arranged on the inner pipe wall and the outer pipe wall of the heat exchange pipe (2) along the axis of the inner pipe wall and the outer pipe wall, disturbance steps (10) are arranged on the disturbance strips (9), and the disturbance steps (10) are gradually lifted along the flowing direction of a fluid.

2. The step diffusion heat exchange device of claim 1, wherein: the disturbance steps (10) arranged on the disturbance strips (9) gradually rise and then gradually fall along the flowing direction of the fluid.

3. The step diffusion heat exchange device of claim 2, wherein: the number of the gradually-reduced disturbance steps (10) is equal to the number of the gradually-increased disturbance steps (10).

4. The step diffusion heat exchange device of claim 1, 2 or 3, wherein: the gradually-rising disturbance step (10) has three stages.

5. The step diffusion heat exchange device of claim 1, wherein: the disturbance strips (9) are welded on the pipe wall of the heat exchange pipe (2).

6. The step diffusion heat exchange device of claim 1, wherein: the pipe wall of the heat exchange pipe (2) is provided with a dovetail groove, and the disturbance strip (9) is clamped in the dovetail groove.

7. The step diffusion heat exchange device of claim 1, wherein: in the shell (1), the arrangement angles of the disturbance strips (9) on the two adjacent heat exchange tubes (2) are different.

8. The step diffusion heat exchange device of claim 1, 2 or 7, wherein: both ends of the shell (1) are provided with tube plates (3), tube boxes (4) are arranged outside the tube plates (3), and the heat exchange tubes (2) are fixed between the tube plates (3).