CN211204991U

CN211204991U - Novel baffling rod heat exchanger device

Info

Publication number: CN211204991U
Application number: CN201922155471.0U
Authority: CN
Inventors: 王建江; 谢金山; 谭雅丹
Original assignee: YONGSHENG MACHINERY INDUSTRIAL (KUNSHAN) CO LTD
Current assignee: YONGSHENG MACHINERY INDUSTRIAL (KUNSHAN) CO LTD
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-08-07
Anticipated expiration: 2029-12-05

Abstract

The utility model discloses a novel baffling rod heat exchanger device, including the casing, shells inner wall is equipped with the baffling ring, sets up many baffling rods with X axle, Y axle direction on the baffling ring respectively to be equipped with many heat exchange tubes in many baffling rods that X axle, Y axle set up. The utility model has the advantages that: the rod type support is adopted to replace a baffling rod heat exchanger supported by the baffling plate, so that the induced vibration of the fluid is solved, and the heat transfer dead zone is eliminated due to the change of the flowing direction and the state of the fluid. This configuration necessarily increases the shell-side fluid velocity by more than a factor of two over the single arcuate baffle. The flow velocity is accelerated, the shearing force of fluid to the liquid film outside the pipe is increased, so that the liquid film is thinned, and the baffle rod interferes the flow of the fluid to generate vortex and turbulence, so that the effect of thinning the liquid film is also achieved, and the heat transfer coefficient is greatly improved.

Description

Novel baffling rod heat exchanger device

Technical Field

The utility model relates to a heat exchanger technical field specifically is a novel baffling rod heat exchanger device.

Background

The general baffle plate structure is an arch baffle plate, a few of baffle plates are circular baffle plates, rectangular baffle plates, baffle rods, grid baffle plates and other baffle plates, the structure of the arch baffle plate is more, the simplified flowing state of fluid in a shell is shown in figures 7 and 8, the figure marked with A is a heat transfer main area, the fluid transversely impacts a tube bundle in the area to conduct heat in a cross flow manner, the turbulent flow state can be achieved under the condition of lower Re number, and about 85% of heat transfer is completed in the area; the area marked B is a forward flow area, the fluid and the tube bundle are in parallel flow, and the heat transfer completed in the area only accounts for about 15 percent; the region marked C is the vortex region where the fluid is stationary or relatively stagnant, where small vortex recirculation will quickly bring the fluid temperature to equilibrium with the surface temperature of the tube, and because the fluid is relatively static, its thermal mixing is minimal, so called the heat transfer dead zone, when the arcuate cut is 75%, the B, C region accounts for (25-30)% of the total heat transfer area, i.e. the device's (25-30)% capacity is not fully exploited.

In order to assemble the tube bundle, the tube holes of the baffle plates are larger than the tube diameter, and the tubes are not tightly fixed, so that the heat exchanger is easy to vibrate, the welded joints of the tubes and the tube plates are broken, the tubes at the tube holes of the baffle plates are worn through, and the service life is short. The most effective method for reducing vibration is to shorten the distance between the baffles or to reduce the speed of the fluid, but increasing the number of baffles results in increased shell-side resistance and increased heat transfer dead space, increased energy consumption and smaller effective heat transfer area, while decreasing the flow rate of the fluid results in increased size, decreased efficiency and increased cost of the heat exchanger, and thus both methods are uneconomical.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel baffling rod heat exchanger device to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel baffling rod heat exchanger device, includes the casing, shells inner wall is equipped with the baffling ring, set up many baffling rods with X axle, Y axle direction respectively on the baffling ring, with many that X axle, Y axle set up be equipped with many heat exchange tubes in the baffling rod.

Preferably, the plurality of baffle rods arranged in the directions of the X axis and the Y axis are connected with the baffle ring in a grid shape.

Preferably, the rod baffle in the X-axis direction is disposed at an upper end of the rod baffle in the Y-axis direction.

Preferably, the heat exchange tubes penetrate through the grid-shaped baffle rods.

Preferably, the distance between the plurality of baffle rods arranged along the X axis and the Y axis is matched with the diameter of the plurality of heat exchange tubes.

Preferably, a plurality of the baffle rings and the baffle rods are arranged in the shell.

Preferably, a plurality of fixing rods for fixing the baffle rings are arranged between the shell and the baffle rings.

Advantageous effects

The rod type support is adopted to replace a baffling rod heat exchanger supported by the baffling plate, so that the induced vibration of the fluid is solved, and the heat transfer dead zone is eliminated due to the change of the flowing direction and the state of the fluid. This configuration necessarily increases the shell-side fluid velocity by more than a factor of two over the single arcuate baffle. The flow velocity is accelerated, the shearing force of fluid to the liquid film outside the pipe is increased, so that the liquid film is thinned, and the baffle rod interferes the flow of the fluid to generate vortex and turbulence, so that the effect of thinning the liquid film is also achieved, and the heat transfer coefficient is greatly improved.

Drawings

FIG. 1 is a schematic cross-sectional view of the inside of the housing of the present invention;

FIG. 2 is a schematic structural view of the heat exchange tube and the baffle rod of the present invention;

FIG. 3 is a schematic front view of the heat exchange tube and the baffle rod of the present invention;

FIG. 4 is a schematic view of the heat exchange tube structure of the present invention;

FIG. 5 is a partially enlarged view of the heat exchange tube and the baffle rod of the present invention;

fig. 6 is a schematic view of the overall structure of the present invention;

FIG. 7 is a schematic view of a prior art fluid state;

fig. 8 is a schematic diagram of a state of the art fluid.

Reference numerals

1-shell, 2-baffle ring, 3-baffle rod and 4-heat exchange tube.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Examples

As shown in fig. 1-6, a novel baffle rod heat exchanger device comprises a shell 1, wherein a baffle ring 2 is arranged on the inner wall of the shell 1, a plurality of baffle rods 3 are respectively arranged on the baffle ring 2 in the directions of an X axis and a Y axis, and a plurality of heat exchange tubes 4 are arranged in the baffle rods 3 arranged in the directions of the X axis and the Y axis.

Preferably, a plurality of baffle rods 3 arranged in the X-axis and Y-axis directions are connected to the baffle ring 2 in a mesh shape.

Preferably, the rod baffle 3 in the X-axis direction is provided at the upper end of the rod baffle 3 in the Y-axis direction.

Preferably, the heat exchange tubes 4 penetrate between the rod baffles 3 in a grid shape.

Preferably, the distance between the plurality of baffle rods 3 arranged in the X axis and the Y axis is matched with the diameter of the plurality of heat exchange tubes 4.

Preferably, a plurality of baffle rings 2 and baffle rods 3 are arranged in the housing 1.

Preferably, a plurality of fixing rods for fixing the baffle rings 2 are provided between the housing 1 and the plurality of baffle rings 2.

The rod type support is adopted to replace a baffling rod heat exchanger supported by the baffling plate, so that the induced vibration of the fluid is solved, and the heat transfer dead zone is eliminated due to the change of the flowing direction and the state of the fluid. The shell side fluid of the rod baffle heat exchanger flows axially in parallel with the tube bundle, and when the fluid flow distribution at the inlet is good, the fluid can flow uniformly on the whole cross section of the tube bundle, so that the heat transfer surface can be fully utilized. Although the heat transfer coefficient in parallel flow is lower than that in transverse flow, after the baffle rod is used for supporting, the fluid generates a separation phenomenon when passing through the rod systems, vortex wake flow is generated behind the rod systems, the turbulent motion is more violent as the flow speed of the fluid is higher, so that the heat transfer effect is enhanced, and after the strength of the vortex is weakened, the fluid generates new vortex and throttling through the baffle rod behind the fluid, so that the uniform vortex is generated on the whole length and the heat transfer surface of the heat exchanger; in addition, the structure inevitably increases the shell-side fluid velocity, and the flow speed can be increased by more than two times compared with the single arched baffle. The flow velocity is accelerated, the shearing force of fluid to the liquid film outside the pipe is increased, so that the liquid film is thinned, and the baffle rod interferes the flow of the fluid to generate vortex and turbulence, so that the effect of thinning the liquid film is also achieved, and the heat transfer coefficient is greatly improved.

The grid shape induces local cross flow components at the top of the longitudinal flow pattern, which together improve the heat transfer characteristics at the tube surface, the break up of the boundary layer occurs repeatedly at each expanded metal baffle along the length of the heat exchanger, resulting in lower hydraulic resistance, while maintaining higher heat transfer, the pressure loss effectively translates into improved heat transfer, and the heat transfer is significantly higher at the same fluid velocity compared to the throttling baffles, the direct result of shell side longitudinal flow, tube vibration in the heat exchanger is effectively eliminated, the risk of mechanical damage is significantly reduced, the longitudinal direction of the shell side liquid in the heat exchanger approaches pure counterflow, so they can provide higher heat load at the same approach temperature.

The wide range of applications of liquid/liquid and gas/gas to condensation and boiling has been demonstrated, and in the fouling service of crude oil preheat systems, the dead zones typically found in conventional staged designs reduce heat exchanger performance while increasing pressure drop during operation. However, with the new rod baffle heat exchanger device, no dead space is created behind the new rod baffle due to longitudinal flow and thermal performance is improved by more than 50%. The vibration is eliminated by completely supporting all the heat exchange tubes on each pin.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the protection scope of the present invention.

Claims

1. A novel rod baffle heat exchanger device comprises a shell (1), and is characterized in that: casing (1) inner wall is equipped with baffling ring (2), set up many baffling rods (3) with X axle, Y axle direction respectively on baffling ring (2), with the many that X axle, Y axle set up be equipped with many heat exchange tubes (4) in baffling rod (3).

2. The novel rod baffle heat exchanger apparatus of claim 1, wherein: the multiple baffle rods (3) arranged in the X-axis direction and the Y-axis direction are in a grid shape and are connected with the baffle ring (2).

3. The novel rod baffle heat exchanger apparatus of claim 1, wherein: the X-axis direction of the deflection rod (3) is arranged at the upper end of the Y-axis direction of the deflection rod (3).

4. The novel rod baffle heat exchanger apparatus of claim 1, wherein: the heat exchange tubes (4) penetrate through the grid-shaped baffle rods (3).

5. The novel rod baffle heat exchanger apparatus of claim 1, wherein: the multiple baffle rods (3) are arranged along the X axis and the Y axis, and the distance between the baffle rods is matched with the multiple heat exchange tubes (4) in diameter.

6. The novel rod baffle heat exchanger apparatus of claim 1, wherein: the shell (1) is internally provided with a plurality of baffle rings (2) and baffle rods (3).

7. The novel rod baffle heat exchanger apparatus of claim 1, wherein: the shell (1) and the multiple baffle rings (2) are provided with multiple fixing rods for fixing the baffle rings (2).