CN112304126B - A multi-strand medium distribution structure suitable for micro-channel plate heat exchange equipment - Google Patents

Abstract

The invention relates to a heat exchanger, in particular to a multi-strand medium distribution structure suitable for micro-channel plate type heat exchange equipment. The structure is arranged at the end parts of a medium inlet and a medium outlet A and a medium inlet and a medium outlet B of the plate type heat exchange core body and comprises an end cover, a channel, a medium channel box and a connecting pipe, wherein the outlet of each medium channel layer and the inlet of each medium channel layer of the plate type heat exchange core body are respectively and correspondingly connected with at least one channel to form closed connection; the end covers are respectively arranged at the end parts of the medium inlet and outlet A and the medium inlet and outlet B of the plate type heat exchange core body, and cover the channel and the plate type heat exchange core body to form an integrated structure; the end cover is provided with a channel through hole, one side of the channel through hole, which is far away from the plate type heat exchange core body, is connected with a medium pipe box, and the medium pipe box is also provided with a connecting pipe. The invention can realize the distributed heat exchange of a plurality of streams of flow media on the basis of the prior plate process without additionally redesigning the arrangement of the plate channels of the heat exchange core body.

Description

A multi-strand medium distribution structure suitable for micro-channel plate heat exchange equipment

technical field

The invention belongs to the field of microchannel heat exchange, and in particular relates to a multi-strand medium distribution structure suitable for microchannel plate heat exchange equipment.

technical background

The heat exchange or reaction equipment used in the fields of energy, chemical industry, environmental protection, medicine, etc. has put forward higher and higher requirements for the compactness and efficiency of the equipment. The traditional heat exchange equipment or reaction equipment is based on the energy transport of two media Principles for overall design. With the development of various new processes and processes, using an integrated device to exchange heat between more fluids has become an effective solution to improve the compactness of systems and devices.

Spiral tube heat exchanger is a good type of multi-strand medium heat exchange equipment. This type of heat exchanger has significant advantages over traditional tube-and-tube heat exchangers, which are mainly reflected in: the tightly wound heat exchange tube bundle greatly improves the space compactness of the shell side of the heat exchanger, and the absence of baffles avoids the The dead zone of the medium flow, the spiral heat exchange tube effectively strengthens the heat transfer of the medium in the tube and improves the adaptability to the large temperature difference heat transfer condition, especially the use of the layer distribution technology of the wound heat exchange tube can realize several tubes side media at the same time heat exchange. However, this type of equipment cannot well meet the further compactness requirements in the fields of marine, nuclear power, and micro-reaction, which hinders its application extension.

As an efficient heat exchange device, the plate heat exchanger with tiny channels is a supplement to the wound tube heat exchanger in its application scenarios. Patent CN108955316A discloses a multi-stream printed circuit board heat exchanger, including a heat exchange core and a cold fluid inlet, a cold fluid outlet, a hot fluid inlet, and a hot fluid outlet connected to the heat exchange core. The plate channel layout of the heat core body needs to be specially designed and manufactured, and cannot be directly used on the existing heat exchange core body, resulting in waste of resources and increased use costs.

Contents of the invention

The purpose of the present invention is to solve the above problems and provide a multi-strand medium distribution structure suitable for micro-channel plate heat exchange equipment.

The present invention adopts following technical scheme:

A multi-strand medium distribution structure suitable for micro-channel plate heat exchange equipment, the structure is located at both ends of the medium inlet and outlet A of the plate heat exchange core and the medium inlet and outlet B, and is characterized in that it includes an end cover, a channel and The medium pipe box, the outlet and the entrance of each medium channel layer of the plate heat exchange core are respectively connected to at least one channel, and each channel communicates with the corresponding medium channel contained in the corresponding medium channel layer and forms a closed The number of channels connected to the outlet and inlet of the same medium channel layer is the same, and the end covers are respectively arranged at the ends of the medium inlet and outlet A and the medium inlet and outlet B of the plate heat exchange core, and cover the grooves Road, the end cover, the channel and the plate heat exchange core are connected to each other to form an integrated structure;

The end cover is provided with channel through holes, and the side of the channel through holes away from the plate heat exchange core is connected to the medium pipe box; each channel passes through the medium type according to the medium type in the corresponding medium channel. The channel through hole communicates with a medium pipe box containing a corresponding type of medium.

Preferably, each of the channels is only connected to one medium, and all the channels connected to the same medium form a group, and the channels of the same group are at the ends of the medium inlet and outlet A and the medium inlet and outlet B of the plate heat exchange core. Connect a media tube box respectively.

Preferably, the channel is a flat rectangular structure, and the interior of the channel is hollow so that all the medium channels in the medium channel layer correspondingly connected to the channel communicate with each other, and the thickness of the channel is the same as that of the medium channel layer of the plate heat exchange core. The thicknesses are matched, and the channels form a multilayer structure arranged up and down at both ends of the medium inlet and outlet A and the medium inlet and outlet B of the plate heat exchange core.

Preferably, the outlet and the inlet of the same medium channel layer are respectively connected to at least one channel to form the same layer of channels, and the two ends of each layer of channel along the width direction of the channel are aligned with the position of the medium channel on the medium channel layer. Adaptation, when there are multiple channels, the channels of the same layer are arranged side by side along the channel width direction; the channel width refers to the width along the arrangement direction of the medium channels on the medium channel layer.

Preferably, each of the channels is connected to the channel through hole through an extension channel, the thickness of the extension channel is consistent with the thickness of the connected channel, and the width is smaller than the width of the connected channel to make the medium concentrated.

Preferably, the medium pipe box is semi-cylindrical, and the upper and lower ends of the medium pipe box do not exceed the upper and lower ends of the end cover on the end cover.

Preferably, the medium pipe box is further provided with a connecting pipe, and the connecting pipe is perpendicular to the axis of the medium pipe box and arranged at the center of the arc surface of the medium pipe box.

Preferably, the medium pipe box forms an integrated structure with the plate heat exchange core, the channel and the end cover.

Preferably, the plate heat exchange core, the end cover, the channel and the medium pipe box are connected by diffusion welding or brazing; or form an integrated structure by 3D printing.

The beneficial effects of the present invention are:

1) The present invention transforms the multi-flow distribution of the heat exchange core with a microchannel plate structure, which can realize the simultaneous heat exchange of multiple cold and hot fluids, further improves the compactness and heat transfer efficiency of the heat exchange core, and can Meet higher process integration requirements and optimize process performance.

2) The present invention uses end caps and channels to distribute multi-stream media, which can be directly applied on the basis of the existing heat exchange plate technology, without the need for additional heat exchange core plate channel layout design, nor It is necessary to make additional modifications and corrections to the design, manufacturing process and thermal design of the existing heat exchange plate, which reflects better adaptability and is easy to use. At the same time, the use of the existing heat exchange plate process can also save resources and avoid waste .

Description of drawings

Fig. 1 is a structural schematic diagram of an existing plate heat exchange core;

Fig. 2 is a structural representation of the present invention;

Fig. 3 is the arrangement schematic diagram of channel of the present invention;

Fig. 4 is a schematic structural view of the combination of the end cap and the channel of the present invention;

Figure 5A and Figure 5B are schematic diagrams of the connection plane between the channel and the medium pipe box of the present invention;

Fig. 6 is a schematic diagram of the arrangement of the medium pipe box and the connecting pipe on the end cover of the present invention;

The different arrows in Figure 1-5 represent the access and exit of different media.

The meanings of the marked symbols in the figure are as follows:

10-plate heat exchange core 11-medium channel layer 111-medium channel 20-end cover

21-channel through hole 30-channel 31-extended channel 40-medium pipe box 50-connector

Detailed ways

Below in conjunction with embodiment technical scheme of the present invention is made more specific description:

As shown in Fig. 1, the plate heat exchange core 10 is a common plate heat exchange equipment in the prior art, having two ends of a medium inlet and outlet A and a medium inlet and outlet B, and the inside of the plate heat exchange core 10 is composed of a plurality of medium The channel layers 11 are stacked and connected to form a heat exchange structure, and each medium channel layer 11 has several medium channels 111 . The inlet of the medium channel layer 11 and the outlet of the medium channel layer 11 are determined according to the corresponding flow direction of the medium, and are not unique.

As shown in Figure 2-6, a multi-strand medium distribution structure suitable for micro-channel plate heat exchange equipment is provided at the two ends of the medium inlet and outlet A and the medium inlet and outlet B of the plate heat exchange core 10 and at both ends The setting form is the same. Including the end cover 20, the channel 30, the medium pipe box 40 and the connecting pipe 50, the outlet of each medium channel layer 11 and the inlet of the medium channel layer 11 of the plate heat exchange core 10 are respectively connected to at least one channel 30, and each channel The track 30 forms a closed connection with the media channel 111 contained in the corresponding media channel layer 11 part.

The channel 30 is a flat rectangular structure, and the interior of the channel is hollow so that all the medium channels 111 in the correspondingly connected medium channel layer 11 communicate with each other. The thickness of the channel 30 is suitable for the thickness of the medium channel layer 11 of the plate heat exchange core 10 Matching, the channels 30 form a multilayer structure arranged up and down or stacked at both ends of the medium inlet and outlet A and the medium inlet and outlet B of the plate heat exchange core 10 . The left and right ends of each channel 30 along the width direction of the channel 30 are aligned on the same vertical plane, and the width of the channel 30 refers to the width of the channel 30 perpendicular to the water flow direction of the medium channel layer 11 of the plate heat exchange core 10 .

Each medium channel layer 11 outlet, medium channel layer 11 entrance correspondingly connected channel 30 respectively is the channel 30 of the same layer, each layer of channel 30 along the two ends of the channel 30 width direction and the channel on the medium channel layer 11 where it is located The position of the medium channel 111 is adapted. When the exit and entrance of the same medium channel layer 11 are correspondingly connected with multiple channels 30, the channels 30 are arranged side by side along the width direction of the channel 30, and the width of a single channel 30 is adjusted. The overall width of the channels 30 of the layer is kept constant.

The end caps 20 are respectively arranged at both ends of the medium inlet and outlet A and the medium inlet and outlet B of the plate heat exchange core 10, forming an integral structure with the plate heat exchange core 10; the end cover 20 is provided with a channel through hole 21, and the channel The side of the through hole 21 away from the plate heat exchange core 10 is connected to the medium pipe box 4 .

The channels 30 are arranged in groups according to the types and quantities of the media of the plate heat exchange core 10. Each channel 30 is only connected to one type of medium. All the channels 30 connected to the same medium form a group. 31 is connected with the channel through hole 21 and connected to the same medium pipe box 40. The thickness of the extended channel 31 is consistent with the thickness of the connected channel 30 , and the width is smaller than the width of the connected channel 30 to make the medium concentrated.

The medium pipe box 40 is semi-cylindrical, and the upper and lower ends of the medium pipe box 40 do not exceed the upper and lower ends of the end cover 20 on the end cover 20; the medium pipe box 40 is provided with a connecting pipe 50, which is perpendicular to the axis of the medium pipe 40 and arranged on At the central position of the arc surface of the medium pipe box 40, the connecting pipe 50 forms a total inlet and outlet pipeline for a single medium.

The medium tube box 40 and the plate heat exchange core 10, the channel 30 and the end cover 20 can also form an integrated structure, and the plate heat exchange core 10, the end cover 20, the channel 30 and the medium tube box 40 are connected by diffusion welding, Joined by brazing to form a one-piece structure, or by 3D printing to form a one-piece structure.

When using diffusion welding connection, the end cover 20 uses a metal material or a non-metallic material with good diffusion welding performance and good connection performance with the plate heat exchange core 10, and the end cover 20 can be connected with the heat exchange core 10 Diffusion welding connections that meet the precision requirements are carried out to form a complete integrated heat exchange equipment.

In this embodiment, a total of three strands of media participate in heat exchange, namely one strand of heat medium and two strands of cold medium. The heat medium and the cool medium are stacked layer by layer in the plate heat exchange core 10 and the convective direction of heat exchange is opposite. Wherein the cold medium layer includes two channels 30 arranged side by side to separate two strands of cold medium, the width of each cold medium layer channel 30 is 1/2 of the width of the heat medium layer channel 30, and three channels are connected outside the end cover 20 The medium tube boxes 40 respectively correspond to three strands of medium.

When working, the heat medium flows into the medium pipe box 40 from the connection pipe 50 provided at the medium inlet and outlet B end of the plate heat exchange core 10, and enters the corresponding multiple channels in the medium pipe box 40 through the channel through hole 21 and the extended channel 31. The channel 30 of different layers, because the accommodation space of the channel 30 is larger than that of the extended channel 31, the medium is buffered in the channel 30; the medium enters the corresponding medium channel layer 11 from the channel 30, and the end of the medium entering the medium channel layer 11 is called It is the entrance of the medium channel layer 11, that is, in this embodiment, the entrance of the medium channel layer 11 of the heat medium is at the B end of the plate heat exchange core 10; The connecting pipe 50 provided at the A end of the inlet and outlet flows into the corresponding medium pipe box 40, and enters the corresponding multiple channels 30 through the channel through hole 21 and the extended channel 31 in the medium pipe box 40 and enters the medium channel layer 11. The cold medium The inlet of the medium channel layer 11 is at the A end of the plate heat exchange core 10 . The cold and hot medium respectively pass through the plate heat exchange core 10 , flow in the medium channel layer 11 of the plate heat exchange core 10 and perform heat exchange.

After the heat exchange, the heat medium flows out from the medium inlet and outlet A end of the plate heat exchange core 10 to the channel 30, and the heat medium flows into the corresponding medium pipe box 40 through the extension channel 31 and the channel through hole 21, and is connected to the pipe 50 flows out, and the two cold mediums flow out from the medium inlet and outlet B end of the plate heat exchange core 10 to the channel 30, and flow into the corresponding medium pipe box 40 through the extension channel 31 and the channel through hole 21, and connect from the pipe 50 flow out. In this embodiment, the inlet of the medium channel layer 11 of the heat medium is at the A end of the plate heat exchange core 10 , and the inlet of the medium channel layer 11 of the cold medium is at the B end of the plate heat exchange core 10 .

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit the present invention; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: Any modification, equivalent replacement and improvement made within the principles shall be included in the protection scope of the present invention.

Claims (6)

1. A multi-strand medium distribution structure suitable for micro-channel plate type heat exchange equipment is arranged at the ends of a medium inlet and a medium outlet A and a medium inlet and a medium outlet B of a plate type heat exchange core body (10), and is characterized by comprising end covers (20), channels (30) and a medium channel box (40), wherein the outlet and the inlet of each medium channel layer (11) of the plate type heat exchange core body (10) are respectively and correspondingly connected with at least one channel (30), each channel (30) is communicated with a corresponding medium channel (111) contained in the corresponding medium channel layer (11) to form closed connection, the end covers (20) are respectively arranged at the ends of the medium inlet and the medium outlet A and the medium inlet and the medium outlet B of the plate type heat exchange core body (10) and cover the channels (30), and the end covers (20), the channels (30) and the plate type heat exchange core body (10) are connected with each other to form an integrated structure;

a channel through hole (21) is formed in the end cover (20), and one side, far away from the plate type heat exchange core body (10), of the channel through hole (21) is connected with a medium pipe box (40); each of the channels (30) communicates with a medium manifold (40) accommodating a corresponding medium kind through the channel through-hole (21) according to the medium kind in the corresponding medium passage (111);

the channel (30) is of a flat rectangular structure, all medium channels (111) in the medium channel layer (11) correspondingly connected with the channel (30) are communicated with each other due to the hollow arrangement of the channel (30), the thickness of the channel (30) is matched with that of the medium channel layer (11) of the plate heat exchange core (10), and the channel (30) forms a multi-layer structure which is vertically arranged at two ends of a medium inlet and outlet A and a medium inlet and outlet B of the plate heat exchange core (10) respectively;

the channels (30) arranged at the outlet and the inlet of the same medium channel layer (11) respectively form channels (30) at the same layer, the two ends of each layer of channel (30) along the width direction of the channel (30) are matched with the positions of the medium channels (111) on the medium channel layer (11), and when the channels (30) are multiple, the channels (30) at the same layer are arranged in parallel along the width direction of the channels (30); the width of the channel (30) refers to the width along the arrangement direction of the medium channels (111) on the medium channel layer (11);

each channel (30) and the channel through hole (21) are connected through an extension channel (31), the thickness of the extension channel (31) is consistent with the thickness of the connected channel (30), and the width of the extension channel is smaller than the width of the connected channel (30) so as to concentrate media.

2. The multi-medium distribution structure suitable for the microchannel plate heat exchanger as claimed in claim 1, wherein each of the channels (30) is connected with only one medium, all channels (30) connected with the same medium are in one group, and the channels (30) in the same group are respectively connected with one medium channel box (40) at the ends of the medium inlet/outlet a and the medium inlet/outlet B of the plate heat exchanger core (10).

3. The multi-strand medium distribution structure suitable for the microchannel plate heat exchanger as recited in claim 1 or 2, wherein the medium channel box (40) is semi-cylindrical, and the upper and lower ends of the medium channel box (40) are not beyond the upper and lower ends of the end cap (20) on the end cap (20).

4. The multi-strand medium distribution structure suitable for the microchannel plate heat exchanger as recited in claim 3, wherein the medium channel box (40) is further provided with a connection pipe (50), and the connection pipe (50) is perpendicular to the axis of the medium channel box (40) and is arranged at the center of the arc surface of the medium channel box (40).

5. The multi-strand medium distribution structure suitable for the microchannel plate heat exchange device as recited in claim 4, wherein the medium channel box (40) forms an integral structure with the plate heat exchange core (10), the channel (30) and the end cap (20).

6. The multi-strand medium distribution structure suitable for the microchannel plate heat exchange device as recited in claim 1, wherein the plate heat exchange core (10), the end cap (20), the channel (30) and the medium channel box (40) are connected by diffusion welding and brazing; or form a unitary structure by 3D printing.

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