CN212158244U - Multi-tube pass eccentric heat exchanger - Google Patents

Abstract

The utility model provides a multi-tube pass eccentric heat exchanger, which comprises a tube box, a tube plate, an anti-impact baffle, a first partition board, a second partition board, a baffle plate and a heat exchange tube; the shell-side cylinder of the eccentric heat exchanger consists of a first shell-side cylinder, a second shell-side cylinder and a connecting cylinder section, wherein the diameter of the first shell-side cylinder is larger than that of the second shell-side cylinder, and the two shell-side cylinders are connected through the connecting cylinder section; the first pass partition plate is positioned at the vertical center line of the first shell-side cylinder and the second shell-side cylinder; the second partition plate is positioned below the horizontal center line of the first shell pass cylinder. The utility model has the characteristics of prevent heat exchange tube abrasion, increase heat exchange efficiency, reduce the steel consumption, promote resource utilization and rate etc. Adopt the utility model discloses an eccentric heat exchanger of multitube journey is satisfying under the prerequisite of heat exchanger technological requirement and security, can make heat exchanger structure compacter, and the design is more reasonable, has extensive suitability.

Description

Multi-tube pass eccentric heat exchanger

Technical Field

The utility model belongs to the chemical industry equipment field especially relates to an eccentric heat exchanger of multitube journey.

Background

At present, multi-tube pass heat exchangers designed by domestic design houses and manufacturing plants all adopt axisymmetric tube distribution structures, as shown in figure 1, and tube box pass partition plates are all positioned on the central line of equipment, as shown in figure 2. When the anti-impact baffle is arranged at the inlet of the shell pass medium, part of the heat exchange tubes need to be deducted from the corresponding position, and in order to ensure that the flow areas of all tube passes are consistent, the heat exchange tubes at the symmetrical parts are deducted together. The structure can not fully utilize the inner space of the heat exchanger cylinder, and local structure treatment is needed due to the existence of the inner blank area, otherwise, fluid short circuit can be generated, and the heat exchange efficiency is influenced. Because the partial heat exchange tubes are deducted, the heat exchange area is reduced, and in order to ensure the heat exchange area, the length of the heat exchange tubes or the diameter of the heat exchanger needs to be increased, so that the resource waste is caused.

Disclosure of Invention

In view of this, the utility model aims at providing an eccentric heat exchanger of multitube journey to solve the problem that the heat exchanger barrel inner space utilization that the multitube journey heat exchanger of the axial symmetry stringing structure of prior art exists is not abundant, manufacturing cost is high.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the multi-tube pass eccentric heat exchanger comprises a tube box and a shell pass cylinder body which are communicated, wherein the shell pass cylinder body is composed of a first shell pass cylinder body, a second shell pass cylinder body and an eccentric conical cylinder section, the diameter of the first shell pass cylinder body is larger than that of the second shell pass cylinder body, and the two shell pass cylinder bodies are connected through the eccentric conical cylinder section.

Furthermore, the multi-pass eccentric heat exchanger also comprises a tube plate, an anti-impact baffle, a first partition board, a second partition board, a baffle plate and a heat exchange tube; the tube box is connected with the first shell pass cylinder through a tube plate; the heat exchange tubes form a tube bundle, one end of the tube bundle is fixedly connected to the tube plate, and the other end of the tube bundle is freely placed in the shell pass cylinder; the top of the tube box is provided with a tube pass medium inlet, and the bottom of the tube box is provided with a tube pass medium outlet; the first shell pass cylinder is close to one end of the eccentric conical cylinder section, and the top of the first shell pass cylinder is provided with a shell pass medium inlet; the second shell pass cylinder body is close to one end of the end socket, and the top of the second shell pass cylinder body is provided with a shell pass medium outlet; a plurality of baffle plates are distributed in the shell pass cylinder at intervals; the first partition board and the second partition board are vertically intersected and are positioned in the pipe box; the anti-impact baffle is positioned right below the shell side medium inlet.

Further, the first pass partition plate is positioned at the vertical center line of the first shell-side cylinder and the second shell-side cylinder; the second partition plate is positioned below the horizontal center line of the first shell pass cylinder.

Furthermore, the anti-impact baffle is an arc anti-impact baffle.

The utility model has the characteristics of prevent heat exchange tube abrasion, increase heat exchange efficiency, reduce the steel consumption, promote resource utilization and rate etc. Adopt the utility model discloses an eccentric heat exchanger of multitube journey is satisfying under the prerequisite of heat exchanger technological requirement and security, can make heat exchanger structure compacter, and the design is more reasonable, has extensive suitability. Compared with the prior art, the eccentric heat exchanger of multitube journey have following advantage:

(1) a multicell journey eccentric heat exchanger, through setting up two barrels of the size that the diameter is different, reduced heat exchanger shell diameter, reduced heat exchanger shell's calculation thickness, eliminated the blank short circuit region in the effective heat transfer length of heat exchanger, reduced the diameter and the thickness of baffling board, effectively prevented shell side fluid axial short circuit phenomenon, increased the velocity of flow of shell side medium simultaneously, increased heat exchange efficiency.

(2) The multi-tube pass eccentric heat exchanger can reduce the heat exchange area required by the heat exchanger under the condition of meeting the heat transfer quantity required by the process, thereby reducing the quantity of heat exchange tubes; the reduction of heat exchange tube quantity has increased the velocity of flow of the inside medium of heat exchange tube, has played the effect that increases heat exchange efficiency simultaneously, also can reduce the thickness of tube sheet.

(3) A eccentric heat exchanger of multitube journey, the heat exchange tube is close to the form of "evenly densely covered in the stringing circle" in the stringing region, more accords with the basic calculation model in standard GB/T151 heat exchanger for the tube sheet result of calculating according to this standard is more accurate.

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 front view of a shell and tube heat exchanger according to the prior art;

fig. 2 is a left side view of a shell and tube heat exchanger according to the prior art;

fig. 3 is a front view of a multi-pass eccentric heat exchanger according to an embodiment of the present invention;

fig. 4 is a left side view of the multi-pass eccentric heat exchanger according to the embodiment of the present invention.

Description of reference numerals:

1-a pipe box; 2-a tube plate; 3-anti-impact baffle; 4-shell pass cylinder; 5-a first dividing floor; 6-a second pass divider; 7-tube pass medium inlet; 8-a tube side medium outlet; 9-shell side medium inlet; 10-shell side medium outlet; 11-a baffle plate; 12-heat exchange tube; 13-a first shell-side cylinder; 14-a second shell-side cylinder; 15-arc anti-impact baffle; 16-connecting cylinder section.

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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

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

Example 1

As shown in fig. 3 and 4, the multi-tube pass eccentric heat exchanger comprises a tube box 1, a tube plate 2, an arc-shaped anti-impact baffle 15, a first partition board 5, a second partition board 6, a baffle plate 11 and a heat exchange tube 12;

the shell-side cylinder of the eccentric heat exchanger consists of a first shell-side cylinder 13, a second shell-side cylinder 14 and an eccentric conical cylinder section 16, wherein the diameter of the first shell-side cylinder 13 is larger than that of the second shell-side cylinder 14, and the two shell-side cylinders are connected through the eccentric conical cylinder section 16;

the tube box 1 is connected with the first shell pass cylinder 13 through a tube plate 2; a plurality of heat exchange tubes 12 form a tube bundle, one end of the tube bundle is fixedly connected to the tube plate 2, and the other end of the tube bundle is freely placed in the shell pass cylinder. The top of the tube box 1 is provided with a tube pass medium inlet 7, and the bottom is provided with a tube pass medium outlet 8; the first shell pass cylinder 13 is close to one end of the eccentric conical cylinder section 16, and the top of the first shell pass cylinder is provided with a shell pass medium inlet 9; the second shell side cylinder 14 is close to one end of the end socket, and the top of the second shell side cylinder is provided with a shell side medium outlet 10. A plurality of baffle plates 11 are distributed in the shell pass cylinder at intervals;

the first partition wall 5 and the second partition wall 6 intersect perpendicularly and are located inside the tube box 1. The first pass partition plate is positioned at the vertical center line of the first shell-side cylinder and the second shell-side cylinder; the second partition plate is positioned below the horizontal center line of the first shell pass cylinder.

The arc-shaped anti-impact baffle 15 is positioned right below the shell side medium inlet 9.

Comparative example

As shown in fig. 1 and 2, the heat exchanger with axisymmetrical tube arrangement structure in the prior art. The diameter of the shell pass cylinder 4 is uniform; the anti-impact baffle 3 is a flat plate type anti-impact baffle; the first partition board 5 is located at the vertical center line position of the shell-side cylinder 4, and the second partition board 6 is located at the horizontal center line position of the shell-side cylinder 4.

Table 1 example 1 and comparative example heat exchanger parameters

As can be seen from table 1:

1. compared with the comparative example, the heat exchange efficiency of the eccentric heat exchanger in the example 1 is improved by about 34 percent;

2. compared with a comparative example, the eccentric heat exchanger in the example 1 saves about 25% of heat exchange area;

3. compared with a comparative example, the eccentric heat exchanger in the embodiment 1 reduces the diameter of the heat exchanger shell, reduces the calculated thickness of the heat exchanger shell, and reduces the diameter and the thickness of the baffle plate; the weight of the shell and the baffle plate of the heat exchanger is reduced by 10-20%.

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 (4)

1. A multi-tube pass eccentric heat exchanger is characterized in that: the tube type heat exchanger comprises a tube box (1) and a shell pass tube body which are communicated, wherein the shell pass tube body is composed of a first shell pass tube body (13), a second shell pass tube body (14) and an eccentric conical tube section (16), the diameter of the first shell pass tube body (13) is larger than that of the second shell pass tube body (14), and the two shell pass tube bodies are connected through the eccentric conical tube section (16).

2. A multi-pass eccentric heat exchanger according to claim 1, wherein: the anti-impact heat exchanger also comprises a tube plate (2), an anti-impact baffle, a first partition board (5), a second partition board (6), a baffle plate (11) and a heat exchange tube (12);

the tube box (1) is connected with the first shell pass cylinder (13) through a tube plate (2);

a plurality of heat exchange tubes (12) form a tube bundle, one end of the tube bundle is fixedly connected to the tube plate (2), and the other end of the tube bundle is freely placed in the shell pass cylinder;

the top of the tube box (1) is provided with a tube pass medium inlet (7), and the bottom of the tube box is provided with a tube pass medium outlet (8); the first shell side cylinder (13) is close to one end of the eccentric conical cylinder section (16), and the top of the first shell side cylinder is provided with a shell side medium inlet (9); the second shell pass cylinder (14) is close to one end of the end socket, and the top of the second shell pass cylinder is provided with a shell pass medium outlet (10);

a plurality of baffle plates (11) are distributed in the shell pass cylinder at intervals;

the first partition board (5) and the second partition board (6) are vertically intersected and are positioned in the pipe box (1);

the anti-impact baffle is positioned right below the shell side medium inlet (9).

3. A multi-pass eccentric heat exchanger according to claim 2, wherein: the first partition board (5) is positioned at the vertical center line of the first shell-side cylinder (13) and the second shell-side cylinder (14); the second partition plate (6) is positioned below the horizontal center line of the first shell-side cylinder (13).

4. The multi-pass eccentric heat exchanger of any of claims 2-3, characterized in that: the anti-impact baffle is an arc-shaped anti-impact baffle (15).

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