CN201034446Y

CN201034446Y - Bobbin carriage type heat exchanger casing

Info

Publication number: CN201034446Y
Application number: CNU2007200506841U
Authority: CN
Inventors: 张加振
Original assignee: Individual
Current assignee: DONGGUAN CARNOY ENERGY-CONSERVATION SCIENCE Co Ltd
Priority date: 2007-04-24
Filing date: 2007-04-24
Publication date: 2008-03-12
Anticipated expiration: 2017-04-24

Abstract

The utility model relates to the heat exchanger technology field, particular to a heat exchanger box of tube-box type. The box body of the heat exchanger box, and a liquid separating head and a liquid collection head of the box covering plate are disposed as the convex structure which makes the liquid separating head (or air separating head) and the liquid collection head (or air collection head) encapsulate therein, therefore reducing the gap among the heat exchanging tube, the box body and the box covering plate. Then the sectional area of water circulation is reduced, the water flow speed is added, and the reynolds number is increased when other parameters of the heat exchanger are constant. The utility model has simple structure, and the water-side heat transfer coefficient is increased by enlarging the reynolds number, then the area of heat transfer and the material consumption of heat exchanger are decreased, therefore largely enhancing the whole heat transfer coefficient of the heat exchanger.

Description

Box heat exchanger box of tube

The technical field is as follows:

the utility model relates to a heat exchanger technical field refers in particular to a box heat exchanger box of pipe.

Background art:

the water side heat transfer coefficient reference formula is as follows: (1)

In the above formula:

α _i the heat transfer coefficient of the water side is,

λ _i in order to be the thermal conductivity coefficient of water,

d _i is equivalent to water sideThe diameter of the steel wire is measured,

Re _i is the reynolds number of the water,

Pr _i is the prandtl number for water,

n is an index.

The Reynolds number Re is calculated by the formula: (2)

In the above formula:

v is the flow rate of the water and,

γ is the kinematic viscosity of water.

As can be seen from the above two reference calculation formulas (1) and (2), the heat exchange coefficient of the heat exchanger has a very large relationship with the flow rate of the fluid. Under the condition that other parameters are not changed, the larger the flow velocity of the fluid is, the larger the Reynolds number is, and the higher the heat exchange coefficient of the water side is. For example, when the flow rate is increased from 0.5m/s to 0.7m/s, the Reynolds number increases by 40% and the water-side heat transfer coefficient increases by 31%, without changing other parameters. :

the existing tube-box type heat exchanger is limited by the structure, the speed of water flow in the tube-box type heat exchanger is generally lower, the heat exchange coefficient of a water side is lower, and under the condition that other parameters are not changed, if the flow rate of fluid can be increased, the heat exchange coefficient of the water side can be greatly increased, so that the overall heat exchange coefficient of the heat exchanger is greatly increased, the heat exchange area is reduced, and the consumption of materials of the heat exchanger is reduced; in addition, because the liquid distribution head (or gas distribution head) and the liquid collection head (or gas collection head) 1 of the tube box type heat exchanger need to bear higher pressure, the materials of the liquid distribution head (or gas distribution head) and the liquid collection head (or gas collection head) 1 are thicker, as shown in fig. 1, the sealing gasket 2 at the position of the pipeline of the liquid distribution head (or gas distribution head) and the liquid collection head (or gas collection head) 1 also has certain thickness, and the liquid distribution head (or gas distribution head) and the liquid collection head (or gas collection head) 1 are directly placed in the flow channel 3 of the tube box type heat exchanger, the structure can cause that the gap between the heat exchange tube and the box body and the cover plate of the box body is too large, the width of the flow channel 3 is too wide, the cross-sectional area of fluid flow is too large, the fluid flow velocity is low, the heat exchange coefficient of the water side is low, and the heat exchange coefficient of the whole heat exchanger is low.

The utility model has the following contents:

an object of the utility model is to provide a box heat exchanger box to prior art's not enough, this box heat exchanger box's box and box apron divide liquid head (or divide the gas head) and liquid head (or gas head) department to set up to protruding formula structure, increase water side heat transfer coefficient, increase the whole heat transfer coefficient of heat exchanger.

In order to achieve the purpose, the utility model is realized by the following technical scheme: the box body and the box body cover plate of the tube box type heat exchanger are in a convex shape corresponding to the liquid separating head (or the gas separating head) and the liquid collecting head (or the gas collecting head), and other parts of the box body and the box body cover plate of the heat exchanger are sunken areas; the cross-sectional area of the water flow section of the flow channel of the heat exchanger is smaller than that of the liquid distribution head (or the gas distribution head) or the liquid collection head (or the gas collection head), namely the width of the water flow section of the flow channel of the heat exchanger is reduced.

The utility model discloses a set up the box of box heat exchanger box of pipe box and the branch liquid head (or divide the gas head) and the liquid head (or the head of collecting gas) department of box apron into convex structure, should set up convex structure and wrap up liquid head (or divide the gas head) and liquid head (or the head of collecting gas) in this convex structure, reduce the clearance between heat transfer pipe and box and the box apron, in the condition that does not change other parameters of heat exchanger, the cross-sectional area is led to in the reduction rivers, increase the water flow rate, increase the reynolds number, and then increase water side heat transfer coefficient by a wide margin, the whole heat transfer coefficient of heat exchanger is increased by a wide margin, reduce heat transfer area, reduce the consumption of heat exchanger material. The utility model discloses simple structure increases water side heat transfer coefficient through increasing the reynolds number, reduces heat transfer area, reduces the consumption of heat exchanger material, increases the whole heat transfer coefficient of heat exchanger by a wide margin.

Description of the drawings:

FIG. 1 is a schematic structural diagram of a header of a tube-box heat exchanger in the prior art;

fig. 2 is a schematic structural diagram of the present invention.

The specific implementation mode is as follows:

the embodiment is shown in figure 2, the parts 4 of the box body 1 and the box body cover plate 2 of the tube box type heat exchanger, which correspond to the liquid separating head and the liquid collecting head 3, are convex, and other parts 5 of the box body 1 and the box body cover plate 2 of the heat exchanger are sunken areas; the cross section area of the water flow section of the flow channel 6 of the heat exchanger is smaller than the cross section area of the liquid separation head or the liquid collection head 3, namely the width of the water flow section of the flow channel 6 of the heat exchanger is reduced.

Set up protruding formula structure through the branch liquid head and the first 3 departments of liquid collection at box 1 and box apron 2, divide liquid head or the first 3 parcel of liquid collection in protruding formula structure, reduce the clearance between heat exchange tube and box 1 and box apron 2, reduce the 6 width of runner, in the condition that does not change other parameters of heat exchanger, the rivers through-flow sectional area has been reduced, increase the water flow rate, increase the reynolds number, and then increase water side heat transfer coefficient by a wide margin, increase the whole heat transfer coefficient of heat exchanger, reduce heat transfer area, reduce the consumption of heat exchanger material.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles of the present invention are included in the scope of the present invention.

Claims

1. The tube box type heat exchanger box body is characterized in that: the box body (1) and the box body cover plate (2) of the tube box type heat exchanger are in a convex shape corresponding to the parts (4) of the liquid separation head and the liquid collection head (3), and other parts (5) of the box body (1) and the box body cover plate (2) of the heat exchanger are sunken areas; the cross-sectional area of the water flow section of the flow passage (6) of the heat exchanger is smaller than that of the liquid separation head or the liquid collection head (3).