CN212320496U

CN212320496U - Heat exchange equipment of ultra-large air separation device

Info

Publication number: CN212320496U
Application number: CN202020485154.5U
Authority: CN
Inventors: 李建明; 陆国明; 武振乾; 黄凌云
Original assignee: SUZHOU SANCHUAN HEAT EXCHANGER CO LTD
Current assignee: SUZHOU SANCHUAN HEAT EXCHANGER CO LTD
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2021-01-08
Anticipated expiration: 2030-04-07

Abstract

The utility model provides a heat transfer equipment of ultra-large-scale air separation plant, includes a plurality of plate-fin heat exchangers, and its innovation lies in: a distributing plate is arranged in the end socket and is partitioned between the end part of the end socket communicated with the fluid inlet branch pipe and the inlet end of the layer channel of the plate bundle body, and through holes are distributed on the distributing plate. The plurality of plate-fin heat exchangers are arranged along the flow direction of fluid in the fluid inlet header pipe, and the total area of through holes of the flow distribution plates of each plate-fin heat exchanger is gradually increased by taking the arrangement sequence as a reference. The utility model discloses can effectively solve because the bias current problem that the distance between each fluid inlet branch pipe and the house steward entry is different and arouse to improve heat transfer efficiency, be favorable to energy saving and consumption reduction. The design is simple, convenient and effective, the space is saved, and the reliability is higher; in addition, the porous structure of the distribution plate contributes to improving the uniformity of fluid inside the plate-fin heat exchanger monomer.

Description

Heat exchange equipment of ultra-large air separation device

Technical Field

The utility model relates to a indirect heating equipment processing field, in particular to ultra-large air separation plant's indirect heating equipment.

Background

The air separation device is a set of industrial equipment for separating gas components in air and producing gas products such as oxygen, nitrogen and the like. The ultra-large air separation device is widely applied to the industries of petrochemical industry, metallurgy, low-temperature gas liquefaction separation and the like. The plate-fin heat exchanger is widely applied as an efficient and compact heat exchanger and is mainly used for large-scale air separation equipment.

The plate-fin heat exchanger has the following advantages: firstly, the heat transfer efficiency is high, and the heat transfer boundary layer is continuously damaged and updated due to the disturbance of the fins on the fluid, so that the heat transfer coefficient is higher; meanwhile, as the heat conducting performance of the partition plate and the fin material is good, the heat transfer resistance is low, and the heat transfer efficiency is high. Secondly, it has excellent high compactness coefficient, and because its part is mostly thin wall component, makes it light and handy advantage. Moreover, the heat exchanger has high universality, can be suitable for heat exchange in different fluid states (gas state, liquid state and two-phase) and heat release forms (with phase change and without phase change), and can be suitable for heat exchangers in different cold and hot fluid flowing forms (such as concurrent flow, countercurrent flow and cross flow) through the arrangement and combination of channels. Especially in terms of adapting to the number of multi-fluid strands, more than other heat exchangers are incomparable.

However, since the plate-fin heat exchanger needs to be placed in a vacuum brazing furnace for vacuum brazing, the size of the plate-fin heat exchanger is limited. Therefore, with the enlargement of the air separation equipment, the requirement of the total volume of the matched heat exchanger is gradually increased, and the number of the heat exchange units is also gradually increased. For example, the current flow rate is 30000m³The main heat exchanger matched with the/h air separation equipment is formed by connecting 6 plate-fin heat exchangers with the cross section size of 13000mm x 1300mm in parallel. Because of the different distances between the fluid inlet manifolds and the manifold inlet, drift problems arise in that fluid preferentially enters adjacent channels, with the farther the manifold is from the manifold inlet, the fluid flowing into itThe less. The bias flow problem can seriously affect the heat transfer efficiency of the plate-fin heat exchanger, which is contrary to energy conservation and consumption reduction.

The traditional solution is to arrange valves on each fluid inlet branch pipe for regulating and controlling the fluid flow, however, the design needs to add fittings, thereby increasing the additional fitting cost, maintenance cost and reliability risk, and in addition, the design not only increases the complexity of system operation, but also occupies the equipment space.

In view of this, how to design a heat exchange equipment of ultra-large air separation plant, can simply and conveniently solve the bias current problem of heat exchange equipment of ultra-large air separation plant effectively is the utility model discloses the subject of research.

Disclosure of Invention

The utility model provides a heat transfer equipment of super large-scale air separation plant, its purpose is to simply and conveniently solve super large-scale air separation plant's heat transfer equipment's bias current problem effectively.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a heat exchange device of an ultra-large air separation device comprises a plurality of plate-fin heat exchangers; for each fluid, a fluid inlet manifold and a fluid outlet manifold are arranged, the fluid inlet end of each plate-fin heat exchanger is communicated with the fluid inlet manifold through a fluid inlet branch pipe, and the fluid outlet end of each plate-fin heat exchanger is communicated with the fluid outlet manifold through a fluid outlet branch pipe; the plate-fin heat exchanger comprises a plate bundle body, and the plate bundle body is communicated with the fluid inlet branch pipe through a seal head; the innovation lies in that: a flow splitting distribution plate is arranged in the seal head and is partitioned between the end part of the seal head communicated with the fluid inlet branch pipe and the inlet end of the layer channel of the plate bundle body; the main body of the distribution plate is a plate body, and through holes are distributed on the plate body. The plurality of plate-fin heat exchangers are arranged along the flow direction of the fluid in the fluid inlet header pipe, and the total area of the through holes of the distributing plate of each plate-fin heat exchanger is gradually increased by taking the arrangement sequence as a reference.

The relevant content in the above technical solution is explained as follows:

1. in this solution, preferably, the through holes on the splitter plate are uniformly distributed.

2. In this embodiment, preferably, the through holes have the same aperture size for one distribution plate.

3. In this embodiment, the aperture of the through holes is the same for a plurality of the distribution plates, and the number of the through holes increases gradually in the order. The embodiment may also be that, for the several plate-fin heat exchangers, the number of the through holes is the same, and the hole diameters of the through holes are gradually increased in the order.

4. In this aspect, preferably, in each pair of adjacent plate-fin heat exchangers, the total area of the through holes of the plate-fin heat exchanger on the front side is increased by 10% to 25% in comparison with the total area of the through holes of the plate-fin heat exchanger on the rear side in the fluid flow direction in the fluid inlet header.

5. In the scheme, the distribution plate and the seal head are formed by brazing.

The utility model discloses a design principle and beneficial effect are:

firstly, by adopting the heat exchange equipment of the ultra-large air separation device, the total area of the through holes on the distribution plate is set by arranging the distribution plate in the seal head of each plate-fin heat exchanger and combining the distance between each fluid inlet branch pipe and the inlet of the header pipe, and the like, so that the problem of bias flow caused by different distances between each fluid inlet branch pipe and the inlet of the header pipe can be effectively solved. Thereby improving the heat transfer efficiency and being beneficial to energy conservation and consumption reduction.

Secondly, compared with the traditional means of additionally arranging a branch pipe valve, on one hand, the utility model has the advantages of fewer added accessories, more cost advantage, easier maintenance and higher reliability; on the other hand, the utility model discloses it is simple and convenient effective, can not influence the complexity of system operation, also need not to occupy equipment space.

In addition, adopt the utility model discloses, its porous structure of reposition of redundant personnel distributor plate can carry out the secondary distribution through the fluidic, and this helps improving the inside fluid homogeneity of plate-fin heat exchanger monomer.

Drawings

FIG. 1 is a schematic structural diagram of a heat exchange device of a medium-and ultra-large air separation plant of the utility model;

fig. 2 is a schematic diagram of the distribution of the through holes on the distribution plates of the heat exchangers arranged in sequence along the flow direction of the fluid in the fluid inlet header of the present invention.

In the above drawings: 1. a fluid inlet manifold; 2. a plate-fin heat exchanger; 201. a plate bundle body; 202. sealing the end; 203. a distribution plate for distributing the flow; 204. a through hole; 3. a fluid outlet manifold; 4. a fluid inlet manifold; fluid outlet manifold.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

example (b): heat exchange equipment of ultra-large air separation device

A heat exchange device of an ultra-large air separation device comprises six plate-fin heat exchangers 2. For each fluid, a fluid inlet manifold 1 and a fluid outlet manifold 3 are arranged, the fluid inlet end of each plate-fin heat exchanger 2 is communicated with the fluid inlet manifold 1 through a fluid inlet branch pipe 4, and the fluid outlet end is communicated with the fluid outlet manifold 3 through a fluid outlet branch pipe 5; the plate-fin heat exchanger 2 comprises a plate bundle body 201, and the plate bundle body 201 is communicated with the fluid inlet branch pipe 4 through a seal head 202.

A flow dividing distribution plate 203 is arranged in the end socket 202, and the flow dividing distribution plate 203 is partitioned between the end of the end socket 202 communicated with the fluid inlet branch pipe 4 and the inlet end of the layer channel of the plate bundle body 201. The distribution plate 203 is formed by brazing with the seal head 202.

The main body of the distribution plate 203 is a plate body, and through holes 204 are uniformly distributed on the plate body. The six plate-fin heat exchangers 2 are arranged along the flow direction of the fluid in the fluid inlet header pipe 1, and the total area of the through holes 204 of the flow dividing distribution plate 203 of each plate-fin heat exchanger 2 is gradually increased by taking the arrangement sequence as a reference.

In this embodiment, the aperture sizes of the through holes 204 are the same for six of the distribution plates 203, and the number of the through holes 204 increases gradually in the order. In each pair of adjacent plate-fin heat exchangers 2, the total area of the through holes 204 of the front plate-fin heat exchanger 2 is increased by 10% to 25% in comparison with the total area of the through holes 204 of the rear plate-fin heat exchanger 2 in the upward direction of the fluid flow in the fluid inlet header 1.

It should be noted that, in the present invention, in each pair of adjacent plate-fin heat exchangers 2, the fluid in the fluid inlet header 1 flows upward, the plate-fin heat exchanger 2 on the front side is the one relatively far away from the inlet of the fluid inlet header 1, and the plate-fin heat exchanger 2 on the rear side is the one relatively close to the inlet of the fluid inlet header 1.

Other embodiments and structural changes of the present invention are described below as follows:

1. in the above embodiment, for six of the distribution plates, the aperture sizes of the through holes are the same, and the number of the through holes is gradually increased in the order. However, the technical solution of the present invention is not limited to this, and the number of the through holes of the six plate-fin heat exchangers may also be the same, but the aperture of the through holes is gradually increased according to the sequence. As would be readily understood and accepted by those skilled in the art.

2. In the above embodiments, the through holes on the distribution plate are uniformly distributed. However, the present invention is not limited thereto. The utility model discloses it is right the homogeneity that the through-hole distributes does not do special limitation. As would be readily understood and accepted by those skilled in the art.

3. And the distribution plate and the end socket are formed by brazing. However, the present invention is not limited thereto, and other connection manners, such as integrally formed, snap-fit connection, etc., are all within the scope of the present invention, which is easily understood and accepted by those skilled in the art.

4. In the above embodiment, the heat exchange device of the very large air separation plant includes six plate-fin heat exchangers, and in each pair of adjacent plate-fin heat exchangers, the total area of the through holes of the plate-fin heat exchanger on the front side is increased by 10% to 25% in the upward direction of the fluid flow in the fluid inlet header pipe compared with the total area of the through holes of the plate-fin heat exchanger on the rear side. However, in the present invention, the increment ranges of the number of plate-fin heat exchangers and the total area of the through holes are not limited thereto. Because the increment ranges of the total areas of the through holes of the adjacent plate-fin heat exchangers are different for different heat exchange equipment of the ultra-large air separation plant, the increment ranges are influenced by various factors such as the length, the pipe diameter and the like of a fluid inlet main pipe between the adjacent plate-fin heat exchangers. However, for a heat exchange device of a large air separation plant with given relevant parameters, the increment range of the total area of the through holes can be calculated by a person skilled in the art by combining theoretical and measured parameters. As would be readily understood and accepted by those skilled in the art.

5. In the above embodiments, the design is only schematically performed for a fluid pipeline, but the present invention is not limited thereto, and this design may be partially or completely adopted for a plurality of fluid pipelines of a heat exchange device of a set of ultra-large air separation device, and is not described in the embodiments again, which is easily understood and accepted by those skilled in the art.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A heat exchange device of an ultra-large air separation device comprises a plurality of plate-fin heat exchangers (2); aiming at each fluid, a fluid inlet header pipe (1) and a fluid outlet header pipe (3) are arranged, the fluid inlet end of each plate-fin heat exchanger (2) is communicated with the fluid inlet header pipe (1) through a fluid inlet branch pipe (4), and the fluid outlet end is communicated with the fluid outlet header pipe (3) through a fluid outlet branch pipe (5); the plate-fin heat exchanger (2) comprises a plate bundle body (201), and the plate bundle body (201) is communicated with the fluid inlet branch pipe (4) through a seal head (202); the method is characterized in that:

a flow distribution plate (203) is arranged in the seal head (202), and the flow distribution plate (203) is arranged between the end part of the seal head (202) communicated with the fluid inlet branch pipe (4) and the inlet end of the layer channel of the plate bundle body (201) in a spaced mode; the main body of the distribution plate (203) is a plate body, and through holes (204) are distributed on the plate body;

the plurality of plate-fin heat exchangers (2) are arranged along the flow direction of the fluid in the fluid inlet header pipe (1), and the total area of the through holes (204) of the flow dividing distribution plate (203) of each plate-fin heat exchanger (2) is gradually increased by taking the arrangement sequence as a reference.

2. The heat exchange apparatus of claim 1, wherein: the through holes (204) on the distribution plate (203) are uniformly distributed.

3. The heat exchange apparatus of claim 1, wherein: the aperture size of the through holes (204) is the same for one distribution plate (203).

4. The heat exchange apparatus of claim 1, wherein: for a plurality of the distribution boards (203), the aperture sizes of the through holes (204) are the same, and the number of the through holes (204) is increased step by step according to the sequence.

5. The heat exchange apparatus of claim 1, wherein: for the plurality of plate-fin heat exchangers (2), the number of the through holes (204) is the same, and the aperture of the through holes (204) is gradually increased according to the sequence.

6. The heat exchange apparatus of claim 1, wherein: in each pair of adjacent plate-fin heat exchangers (2), the total area of the through holes (204) of the plate-fin heat exchanger (2) on the front side is increased by 10% to 25% in relation to the total area of the through holes (204) of the plate-fin heat exchanger (2) on the rear side in the fluid flow direction in the fluid inlet header (1).

7. The heat exchange device of any one of claims 1 to 6, wherein: the distribution plate (203) is brazed with the seal head (202).