WO2022007444A1

WO2022007444A1 - Tube-on-sheet heat exchanger

Info

Publication number: WO2022007444A1
Application number: PCT/CN2021/083944
Authority: WO
Inventors: 张小彬; 苏骏
Original assignee: 浙江锦欣节能科技有限公司
Priority date: 2020-07-07
Filing date: 2021-03-30
Publication date: 2022-01-13
Also published as: CN111780596A

Abstract

The present invention relates to a tube-on-sheet heat exchanger, comprising: a cold and hot medium heat exchange region, which comprises a sheet pack provided with an inter-sheet medium channel for circulation of a heat medium and a tube-side channel for circulation of a cold medium, with sheets including at least two sheets A and at least two sheets B, and the sheets A and the sheets B being stacked at intervals; and distribution regions, which are arranged on the two sides of the sheet pack and comprise a distribution channel arranged on one side of the sheet pack and a collection distribution channel arranged on the other side of the sheet pack. The heat exchanger is further provided with cold and hot medium inlets and outlets, respectively; the inter-sheet medium channel is in communication with the hot medium inlet and the hot medium outlet; and the tube-side channel is in communication with the cold medium inlet and the cold medium outlet. A cold medium enters the distribution channel via the cold medium inlet, is distributed, then reaches the collection distribution channel via the tube-side channel, then returns to the distribution channel, via the tube-side channel, from the collection distribution channel, and flows out of the outlet after multiple circulations. According to the present invention, blocking does not easily occur, and the heat transfer efficiency is high.

Description

Plate and Tube Heat Exchanger

technical field

The invention relates to the technical field of heat exchangers, in particular to a plate-and-tube heat exchanger.

Background technique

Existing heat exchangers include plate-and-tube heat exchangers with good heat exchange effect, while plate-and-tube heat exchangers with equal distribution have a series of advantages, such as not afraid of the medium being dirty and blocked, and it is not easy to freeze when used in evaporators, etc. And the heat transfer coefficient is very high, it is an effective heat exchanger to replace shell-and-tube heat exchangers and brazed plate heat exchangers; The heat transfer efficiency is not high, which hinders the further promotion of the plate-and-tube heat exchanger according to the uniform distribution. Therefore, the reasonable design of the plate type and the distribution of the fluid between the plates can greatly improve the heat exchange efficiency of the plate and tube type, so as to play a good role in green energy saving and emission reduction, which is of practical significance.

technical problem

In order to solve the problems in the prior art, the present invention provides a plate-and-tube heat exchanger that is not easy to block and has high heat transfer efficiency.

technical solutions

In order to achieve the above purpose, the present invention adopts the following technical solution: a plate-and-tube heat exchanger, including a heat exchange area for a cold and heat medium, and a plate pack, which is provided with an inter-plate medium for the circulation of the heat medium The channel and the tube side channel for the circulation of the cooling medium, the plates include at least two plates A and at least two plates B, the plates A and B are stacked and arranged at intervals; the distribution area is arranged in the plate package The two sides of the heat exchanger, including the distribution channel set on one side of the plate package and the collection and distribution channel set on the other side of the plate package, collect and distribute the medium entering the tube side channel; the heat exchangers are also equipped with cooling Heating medium inlet and outlet, the inter-plate medium channel is communicated with the heating medium inlet and outlet, the tube side channel is communicated with the cooling medium inlet and outlet, and the plates A and B are provided with through holes corresponding to the heating medium inlet and outlet After the cold medium enters the distribution channel through the cold medium inlet for distribution, it passes through the tube side channel to the collection and distribution channel, and then returns from the collection and distribution channel to the distribution channel through the tube side channel. outflow.

As a preferred solution, both the plate A and the plate B are provided with small tube bundles, and the adjacent small tube bundles of the plate A and the small tube bundles on the plate B are adapted to form a front-to-rear pipe side The plate A and the adjacent plate B on the front side form an up-and-down inter-plate medium channel.

As a preferred solution, the inter-plate medium channel is provided with a first air guide member laterally arranged on the plate A or the plate B, and the first air guide members are arranged in a staggered arrangement in the inter-plate medium channel, In order to make the medium flow in the S-shaped or Z-shaped direction in the medium channel between the plates.

As a preferred solution, the distribution area includes at least two bottom plates disposed on the front side of the plate pack and at least two end plates disposed on the back side of the plate pack, a collection and distribution channel is provided between the bottom plates, and the A distribution channel is arranged between the end plates, and second flow guides are arranged on both the bottom plate and the end plates, so that the medium can be deflected in multiple flows in the device.

As a preferred solution, the collection and distribution channel is provided with a second laterally arranged second flow guide, the distribution channel is provided with two second flow guides, and the collection and distribution channel and the distribution channel are provided along the bottom plate respectively. , the first area, the second area, the third area and the fourth area arranged in the extension direction of the end plate, the second guide member of the collection and distribution channel is arranged between the second area and the third area of the bottom plate, the The second air guides of the distribution channel are respectively arranged between the first area and the second area, between the third area and the fourth area of the end plate, and the second air guide has the same diameter as the end plate and the bottom plate. .

As a preferred solution, the distribution area package includes an end plate T and an end plate F disposed on the back side of the plate package, and the collection and distribution area includes a bottom plate M and a bottom plate N disposed on the front side of the plate package, so The end plate F and the bottom plate N are provided with support members and evenly distributed second through holes, and the end plate T and the bottom plate M are provided with support fittings matching the support members.

As a preferred solution, the number of second through holes in the first area, the second area, the third area, and the fourth area are equal.

As a preferred solution, the diameter of the first air guide is smaller than the width of the plate A and the plate B.

As a preferred solution, flanges are provided on the sides of the plate A and the plate B.

As a preferred solution, at least one reinforcing plate is provided on the outer sides of the bottom plate and the end plate.

beneficial effect

Compared with the prior art, the present invention has the following advantages: (1) In the present invention, the cold and hot medium heat exchange area is also provided with a distribution area for distributing, collecting and distributing the medium, and the medium enters the distribution channel from the medium inlet and outlet, In the distribution channel, the medium is distributed into the tube-side channel, passes through the plate pack, and then enters the collection and distribution channel. The collection and distribution channel collects the medium from the tube-side channel in the distribution to the tube-side channel and returns to the distribution In the channel, multiple processes of distribution, collection and distribution are carried out in this way, and finally flows out from the medium outlet. In this way, the tube side channel can form multi-flow baffles, which can reduce the resistance, improve the heat exchange efficiency, and prevent the medium from being dirty and blocked; (2 ) In the present invention, the distribution channel and the collection and distribution channel are provided with mutually matching flow guides, so that the medium can form an S-shaped or Z-shaped flow, which increases the flow length of the medium and achieves a good heat exchange effect; (3) The present invention The medium channel between the plates is provided with staggered flow guides to guide the flow direction of the medium in the medium channel between the plates, so that the medium can flow along the medium channel between the plates according to the set S-shape or Z-shape or other streamlines, increasing the The flow direction and flow rate of the medium can be controlled by changing the position and length of the flow guide; (4) In the present invention, the cold and hot media are separated in the tube side channel and the inter-plate medium channel respectively. , to carry out cold and heat exchange, the resistance between the plates is smaller, the heat exchange efficiency is improved, and the effect of energy saving is achieved.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the schematic diagram of structure explosion of the present invention;

3 is a schematic diagram of four regions of the present invention;

Fig. 4 is the structural representation of the plate A of the present invention;

Fig. 5 is the structural representation of the plate B of the present invention;

Fig. 6 is the structural representation of the end plate F of the present invention;

Fig. 7 is the structural schematic diagram of the end plate T of the present invention;

Fig. 8 is the structural representation of the bottom plate M of the present invention;

FIG. 9 is a schematic structural diagram of the base plate N of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inside", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or It is implied that the method or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the invention.

In the present invention, unless otherwise expressly specified and limited, terms such as "installation", "connection", "connection", "fixing", "retaining" and the like should be understood in a broad sense, for example, it may be a fixed connection or a It is a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the connection between the inner sections of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

As shown in FIGS. 1 to 9 , the plate-and-tube heat exchanger includes a cooling and heating medium heat exchange area, which includes a plate pack 1 , and the plate pack 1 is provided with an inter-plate medium channel for circulating a heating medium and a cooling medium. The tube side channel for circulation, the plate 1 includes at least two plates A 12 and at least two plates B 13, the plates A 12 and B 13 are stacked and arranged at intervals; the distribution area is arranged on the plates Both sides of the package 1 include a distribution channel arranged on one side of the plate package 1 and a collection and distribution channel arranged on the other side of the plate package 1 to collect and distribute the medium entering the tube side channel; There are cold and hot medium inlet and outlet respectively, as shown in Figure 2, the cold fluid medium inlet is 11, the cold fluid medium outlet is 10, the hot fluid medium inlet is 8, and the hot fluid medium outlet is 9; The inlet and outlet of the heating medium are connected, and the pipe side channel is connected with the inlet and outlet of the cooling medium. The plates A 12 and B 13 are provided with second through holes 19 corresponding to the inlet and outlet of the heating medium, and the cooling medium passes through the inlet and outlet of the cooling medium. After entering the distribution channel for distribution, it passes through the tube side channel to the collection and distribution channel, and then returns from the collection and distribution channel to the distribution channel through the tube side channel.

Set up the heat exchange area of cold and hot medium and also have a distribution area for distribution, collection and distribution of the medium. The medium enters the distribution channel from the medium inlet and outlet, and in the distribution channel, the medium is distributed into the tube side channel, and passes through the plate pack 1. , and then enter the collection and distribution channel, the collection and distribution channel collects the medium from the tube-side channel, distributes it to the tube-side channel, returns to the distribution channel, and performs multiple distribution, collection and distribution processes, and finally flows out from the medium outlet. , in this way, the tube side channel can form multi-flow baffles, the resistance is smaller, the heat exchange efficiency is improved, and the medium is prevented from being dirty; Heat exchange, the resistance between the plates is smaller, the heat exchange efficiency is improved, and the effect of energy saving is achieved.

As shown in FIG. 2 to FIG. 5 , both the plate A 12 and the plate B 13 are provided with small tube bundles 14 , and the small tube bundles 14 on the adjacent plate A 12 and the small tube bundles on the plate B 13 14 is adapted to form a tube side channel running forward and backward, the plate A 12 and the adjacent plate B 13 on the front side form a medium channel between the plates running up and down, and the small tube bundles 14 are evenly distributed on the plates A 12, 12 and 13. On the plate B 13, to ensure a uniform flow rate, the small tube bundle 14 includes a plurality of bosses 25 and a plurality of small holes 24 arranged through the bosses 25. The bosses 25 can play a supporting role, and the adjacent plates A 12 communicates with the small holes 24 on the plate B 13 to form a tube side channel, and the adjacent tube side channels are welded and sealed, and are isolated from the medium channel between the plates.

Further, the inter-plate medium channel is provided with a first air guide 15 laterally arranged on the plate A 12 or the plate B 13, and the first air guide 15 is arranged in a staggered arrangement in the inter-plate medium channel Inside, the diameter of the first air guide 15 is smaller than the width of the plate A 12 and the plate B 13, and the first air guide 15 provided on the plate A 12 and the plate B 13 is The lateral concave-convex platforms are arranged at left and right intervals at a certain distance, so that the medium flows in an S-shaped or Z-shaped flow direction in the medium channel between the plates. The flow direction enables the medium to flow along the medium channel between the plates according to the set S-shape or Z-shape or other streamlines, so that the fluid between the plates can be controlled to flow through each area of the flow channel at a constant speed, increasing the flow and performing sufficient heat exchange. , to improve the heat exchange efficiency, and at the same time, by changing the position and length of the flow guide, the flow direction and flow rate of the fluid medium can be controlled. For details, please refer to FIG. 2 to FIG. 5 .

As shown in FIG. 2 and FIG. 6 to FIG. 9 , the distribution area includes at least two bottom plates disposed on the front side of the plate pack 1 and at least two end plates disposed on the back side of the plate pack 1 . There is a collection and distribution channel between them, a distribution channel is arranged between the end plates, and a second flow guide 16 is arranged on both the bottom plate and the end plate, so that the medium can be deflected in multiple flows in the device and increase the flow of cold fluid. , improve the heat exchange efficiency.

Further, as shown in FIG. 2 and FIG. 3 , the collection and distribution channel is provided with a second flow guide 16 arranged laterally, and the distribution channel is provided with two second flow guides 16 to collect The distribution channel and the distribution channel have a first area 20, a second area 21, a third area 22 and a fourth area 2323 respectively arranged along the extension direction of the bottom plate and the end plate, and the second flow guide 16 of the collection and distribution channel is arranged at Between the second area 21 and the third area 22 of the bottom plate, that is, the first area 20 of the distribution collection channel communicates with the second area 21, the second area 21 does not communicate with the third area 22, and the third area 22 and the fourth area 2323 are connected, and the second air guides 16 of the distribution channel are respectively arranged between the first area 20 and the second area 21, between the third area 22 and the fourth area 2323 of the end plate, that is, the first area of the distribution channel. An area 20 is not communicated with the second area 21, the second area 21 is communicated with the third area 22, and the third area 22 is not communicated with the fourth area 2323. The diameter of the second air guide 16 is the same as that of the end plate and the bottom plate , the four areas are equal-value areas, and each area is provided with a certain number of second through holes 19 and each branch tube, so that the number of road tubes flowing into each area is equal, and the flow from the cold fluid medium The fluid entering the first area 20 of the distribution channel from the inlet 11 flows through the through channel of the plate pack 1 to the first area 20 of the collection and distribution channel. Since the first area 20 of the collection and distribution channel communicates with the second area 21, the fluid flows from the collection channel The second area 21 of the distribution channel turns back and flows into the second area 21 of the distribution channel. At this time, the second area 21 of the distribution channel communicates with the third area 22, so the fluid is forced to flow to the third area 22 of the collection and distribution channel, and so on. , and finally flows out from the cold fluid medium outlet 10 at the upper end, the tube side channel can form multi-flow baffles, the resistance is smaller, the heat exchange efficiency is improved, and the medium is prevented from being dirty and blocked.

Further, as shown in FIGS. 6 to 9 , the distribution area package includes an end plate T3 and an end plate F2 arranged on the back side of the plate package 1, and the collection and distribution area includes an end plate T3 and an end plate F2 disposed on the plate package 1. 1. The bottom plate M 4 and the bottom plate N 5 on the front side, the end plate F 2 and the bottom plate M 4 are provided with a support member 17, the support member 17 is a concave and convex platform, and is also provided with evenly distributed second through holes 19, The diameter of the second through hole 19 is 1 mm, which can effectively control the flow rate of each branch tube. The end plate T3 and the bottom plate N5 are provided with supporting fittings 18 that are adapted to the supporting members 17. The fitting 18 is a concave and convex platform, the convex platform plays a supporting role, and the groove part is used for fluid mixing and redistribution.

Further, the plate A 12 and the plate B 13 are both provided with flanges, and the sides of the plate A 12 and the plate B 13 are sealed by the flange to prevent the medium from collusion with the outside world.

Further, as shown in FIG. 2 , at least one reinforcing plate is provided on the outer part of the bottom plate and the end plate, namely the reinforcing plate X 7 arranged on the outer side of the bottom plate N 5 and the reinforcing plate J arranged on the outer side of the end plate T 3 6. The reinforcing plate X 7 only plays the role of strengthening the strength, and the reinforcing plate J 6 is provided with holes which are respectively adapted to the cold fluid medium inlet 11, the cold fluid medium outlet 10, the hot fluid medium inlet 8 and the hot fluid medium outlet 9 , the compressive strength is greatly improved.

The flow direction of the tube side channel: the cold fluid medium enters the distribution channel formed between the end plate F 2 and the end plate T 3 through the cold fluid medium inlet 11 for mixing and distribution, and then enters each branch tube of the plate package 1 (ie. After passing through the entire plate package 1, it is collected and distributed by the collection and distribution channel formed between the bottom plate M4 and the bottom plate N5, and then flows to the end plate from the bottom through each branch of the plate package 1. The distribution flow channel between F 2 and T is mixed and distributed, and the cycle is carried out according to this, and finally the fluid flows to the distribution channel and flows out from the cold fluid medium outlet 10; Enter the plate pack 1 medium channel composed of plate A 12 and plate B 13, and flow along the S-shape or Z-shape between the plates, and the fluid flow fills the entire plate, by setting the plate A 12 and the plate The first flow guide 15 in the sheet B 13 can control the flow rate of the fluid along the specified flow direction, so that the heat exchange is in a state of turbulent flow to achieve the best heat exchange effect, and finally flows out through the hot fluid medium outlet 9; the fluid mixes And distribution: Divide the distribution channel composed of the end plate F 2 and the end plate T 3 and the collection and distribution channel composed of the bottom plate M 4 and the bottom plate N 5 into 4 equal-value areas, and each area has a certain number of The small hole is each branch tube, so that the number of branch tubes flowing into each area is equal; after the fluid from the first area 20 of the end plate flows into the first area 20 of the bottom plate through the tube side channel, due to the first area of the bottom plate A region 20 communicates with the second region 21, and the fluid flows back from the second region 21 of the bottom plate to the second region 21 of the end plate. At this time, the second region 21 of the end plate communicates with the third region 22, so the fluid is forced to flow to the second region 21 of the end plate. The third area 22 of the bottom plate is arranged according to this rule, and finally, the fluid flows out from the fourth area 2323 of the end plate and reaches the cold fluid medium outlet 10; , for cold and heat exchange, the resistance between the plates is smaller, the heat exchange efficiency is improved, and the effect of energy saving is achieved.

According to the invention, the resistance between the plates is smaller, the blockage is not easy, the heat exchange efficiency is more efficient, and the pressure bearing strength is greatly improved, and the application range of the heat exchanger is expanded.

It should be noted that the above embodiments are only representative examples of the present invention. Many variations of the present invention are also possible. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the essence of the present invention shall be considered to belong to the protection scope of the present invention.

Claims

The plate-and-tube heat exchanger is characterized in that it includes a heat exchange area for a cold and hot medium, which includes a plate pack (1), and the plate pack (1) is provided with an inter-plate medium channel for the circulation of a heating medium and a cooling supply. A tube side channel for medium circulation, the plate package (1) includes at least two plates A (12) and at least two plates B (13), the plates A (12) and B (13) are spaced apart Stacking arrangement; distribution area, which is arranged on both sides of the plate pack (1), including a distribution channel arranged on one side of the plate pack (1) and a collection and distribution channel arranged on the other side of the plate pack (1), The medium entering the tube side channel is collected and distributed; the heat exchanger is also provided with a cold and hot medium inlet and outlet respectively, the inter-plate medium channel is connected with the heat medium inlet and outlet, and the tube side channel is connected with the cold medium inlet and outlet, so The plates A (12) and B (13) are provided with through holes (19) corresponding to the inlet and outlet of the heat medium. After the cold medium enters the distribution channel through the cold medium inlet for distribution, it passes through the tube side channel to reach The collection and distribution channel is then returned to the distribution channel from the collection and distribution channel through the tube side channel, and this cycle is cycled, and finally flows out from the outlet.
The plate-and-tube heat exchanger according to claim 1, characterized in that, the plate A (12) and the plate B (13) are both provided with small tube bundles (14), and the adjacent plates are provided with small tube bundles (14). The small tube bundles (14) on the sheet A (12) and the small tube bundles (14) on the sheet B (13) are adapted to form a front-to-rear tube side channel, and the sheet A (12) is adjacent to the front side. B(13) forms an up-and-down inter-plate medium channel.
The plate-and-tube heat exchanger according to claim 1, characterized in that, the inter-plate medium channel is provided with a first flow guide transversely arranged on the plate A (12) or the plate B (13). The first air guides (15) are arranged in a staggered arrangement in the medium channel between the plates, so that the medium flows in an S-shape or a Z-shape in the medium channel between the plates.
The plate-and-tube heat exchanger according to claim 1, characterized in that, the distribution area comprises at least two bottom plates arranged on the front side of the plate pack (1) and a bottom plate arranged on the rear side of the plate pack (1). At least two end plates, a collection and distribution channel is arranged between the bottom plates, a distribution channel is arranged between the end plates, and a second flow guide (16) is arranged on both the bottom plate and the end plate, so that the medium is The device can be deflected in multiple processes.
The plate-and-tube heat exchanger according to claim 4, characterized in that, the collection and distribution channel is provided with a laterally arranged second flow guide (16), and the distribution channel is provided with two The second air guide (16), the collecting and distributing channel, and the distribution channel have a first area (20), a second area (21), a third area (22) and a fourth area respectively arranged along the extension direction of the bottom plate and the end plate (23), the second air guide (16) of the collection and distribution channel is arranged between the second area (21) and the third area (22) of the bottom plate, and the second air guide (16) of the distribution channel 16) are respectively arranged between the first area (20) and the second area (21), between the third area (22) and the fourth area (23) of the end plate, the second air guide (16) It is the same diameter as the end plate and the bottom plate.
The plate-and-tube heat exchanger according to claim 5, characterized in that the distribution area package comprises end plates T and F disposed on the rear side of the plate package (1), and the collection and distribution area It includes a bottom plate M and a bottom plate N arranged on the front side of the plate package (1), the end plate F and the bottom plate M are provided with support members (17), and are also provided with evenly distributed second through holes (19) , the end plate T and the bottom plate N are provided with supporting fittings (18) adapted to the supporting members (17).
The plate-and-tube heat exchanger according to claim 7, wherein the first area (20), the second area (21), the third area (22), and the fourth area (23) are The two through holes (19) are equal in number.
The plate-and-tube heat exchanger according to claim 3, characterized in that, the diameter of the first flow guide (15) is smaller than the width of the plate A (12) and the plate B (13).
The plate-and-tube heat exchanger according to claim 2 or claim 3, characterized in that, the sides of the plate A (12) and the plate B (13) are provided with flanges.
The plate-and-tube heat exchanger according to claim 3, characterized in that, at least one reinforcing plate is provided on the outer side of the bottom plate and the end plate.