CN116222264B

CN116222264B - High-efficient heat preservation leak protection heat exchanger

Info

Publication number: CN116222264B
Application number: CN202310290127.0A
Authority: CN
Inventors: 宋曦智; 王孝红; 缪炜
Original assignee: WUXI GUANYUN HEAT EXCHANGER CO Ltd
Current assignee: WUXI GUANYUN HEAT EXCHANGER CO Ltd
Priority date: 2023-03-23
Filing date: 2023-03-23
Publication date: 2024-02-13
Anticipated expiration: 2043-03-23
Also published as: CN116222264A

Abstract

The invention relates to the field of heat exchangers, in particular to a high-efficiency heat-preservation leakage-proof heat exchanger. The existing tubular heat exchanger has low heat exchange efficiency, and liquid leakage exists in the pipeline. The technical implementation scheme of the invention is as follows: an upper cavity and a lower cavity are formed by arranging a transverse partition plate in the middle of a left auxiliary shell, the upper cavity is communicated with an upper square pipe opening of a U-shaped pipe, and the lower cavity is communicated with a lower opening of the U-shaped pipe; the lower part of the left auxiliary shell is communicated with a liquid inlet cold pipe, and the upper part is communicated with a liquid outlet cold pipe; the right sub-shell is used for placing the corner part of the U-shaped pipe; the U-shaped pipe group is fixedly connected with a wave-shaped plate; the main shell is fixedly connected with a plurality of baffles, and the baffles are positioned at the trough of the wavy plate; the middle upper part of the main shell is communicated with a liquid inlet heat pipe; the middle lower part of the main shell is communicated with a liquid outlet heat pipe. According to the invention, the liquid inlet heat pipe is arranged in the middle of the main shell, so that the phenomenon of pipe explosion caused by large difference of temperature difference of cold and hot fluid at the second contact area is avoided.

Description

High-efficient heat preservation leak protection heat exchanger

Technical Field

The invention relates to the field of heat exchangers, in particular to a high-efficiency heat-preservation leakage-proof heat exchanger.

Background

In the flow mode of the existing shell-and-tube heat exchanger, cold fluid flowing in from a heat transfer tube (U-shaped tube or straight tube) of the heat exchanger enters a heat exchanger shell and then directly contacts with hot fluid, so that the cold fluid directly contacts with the hot fluid, and the heat transfer tube is easy to break due to a larger temperature difference;

moreover, in the existing shell-and-tube heat exchanger, the hot fluid can continuously flow rightward only after the hot fluid passes through the baffle plate below, and when the hot fluid is insufficient to fill the whole heat exchanger shell, the hot fluid cannot contact with the cold fluid in the heat transfer tube positioned at the upper part, so that the heat exchange effect cannot be achieved through the cold fluid in the pipe fitting at the part, and therefore, the heat exchange efficiency of the heat exchanger is low.

Moreover, the joint of the heat transfer tube and the tube plate is the region which is most prone to liquid leakage, and the problem of liquid leakage can be solved only by a regular maintenance and inspection mode.

Disclosure of Invention

The invention provides a high-efficiency heat-preserving and leakage-preventing heat exchanger, which aims to overcome the defect that the heat exchange efficiency of the traditional tubular heat exchanger is low and the leakage exists in a pipeline.

The technical implementation scheme of the invention is as follows: an efficient heat-preserving and leakage-preventing heat exchanger comprises a base, a main shell, a connecting piece, an auxiliary shell, a U-shaped pipe group, a wave-shaped plate and a baffle plate; the base is fixedly connected with a main shell; two ends of the main shell are fixedly connected with a connecting piece; the opposite sides of the two connecting pieces are detachably connected with an auxiliary shell respectively; a U-shaped pipe group is arranged between the two connecting pieces, and the U-shaped pipe group is composed of a plurality of U-shaped pipes; the middle part of the left auxiliary shell is provided with a transverse partition plate to form an upper cavity and a lower cavity, the upper cavity is communicated with the upper square pipe opening of the U-shaped pipe, and the lower cavity is communicated with the lower opening of the U-shaped pipe; the lower part of the left auxiliary shell is communicated with a liquid inlet cold pipe, and the upper part is communicated with a liquid outlet cold pipe; the right sub-shell is used for placing the corner part of the U-shaped pipe; the U-shaped pipe group is fixedly connected with a wave-shaped plate; the main shell is fixedly connected with a plurality of baffles, and the baffles are positioned at the trough of the wavy plate; the middle upper part of the main shell is communicated with a liquid inlet heat pipe; the middle lower part of the main shell is communicated with a liquid outlet heat pipe.

More preferably, the wavy plates are provided with two groups which are respectively arranged at the upper part and the lower part of the U-shaped pipe group, and the two groups of wavy plates are parallel to each other.

More preferably, the U-shaped pipe group also comprises an isolation cover, and two isolation covers are respectively arranged on two sides of the upper part of the U-shaped pipe group.

More preferably, the water isolation pipe sleeve is further included, and the connecting piece and the U-shaped pipe group are connected through the water isolation pipe sleeve.

More preferably, the middle part of the waterproof tube sleeve is provided with a concave area for temporarily storing liquid leakage.

More preferably, the connecting piece is provided with a drain pipe communicated with the concave area.

More preferably, each U-shaped pipe is internally provided with a screw element consisting of a plurality of screw strips.

More preferably, an adjusting valve is arranged in the liquid outlet heat pipe.

The invention has the following advantages: 1. according to the invention, the liquid inlet heat pipe and the liquid outlet heat pipe are arranged in the middle of the main shell, so that the hot fluid is divided into two parts, when the hot fluid is less, the hot fluid flows to the left or right after the wave crest of the wavy plate is first overcome, and the U-shaped pipe is positioned between the wave crest and the wave trough of the wavy plate completely, so that the hot fluid can be fully contacted, the heat exchange efficiency is ensured, and the problem that part of U-shaped pipes cannot exchange heat when the hot fluid is less in the prior art is solved. When the hot fluid is sufficient, the baffle blocks the hot fluid in the upper cavity of the main shell, and simultaneously, the two wave-shaped plates block the hot fluid in the lower cavity of the main shell, so that the flow speed of the hot fluid is reduced, and the action effect is enhanced.

2. According to the invention, the liquid inlet heat pipe is arranged in the middle of the main shell, so that the phenomenon of pipe explosion caused by large difference of temperature difference of cold and hot fluid at the second contact area is avoided.

3. According to the invention, the liquid leakage phenomenon caused by the fact that the thermal fluid acts on the connecting part of the connecting piece and the auxiliary shell can be avoided through the isolation cover. Even the weeping also can be kept in through the sunk area, dismantles discharge or drain pipe discharge through the manual work and examine and repair, has so guaranteed the normal work of heat exchanger.

4. According to the invention, the spiral piece acts on cold fluid, so that the cold fluid can spread sundries in the U-shaped tube, an automatic impurity discharging function is realized, and the cold fluid is fully contacted with all parts in the U-shaped tube, thereby providing a heat exchange effect.

5. According to the invention, through the regulating valve, a certain liquid level of hot fluid is reserved at the bottom of the main shell, so that the bottom of the main shell is in a high-temperature state, and the hot fluid is efficiently utilized.

Drawings

FIG. 1 is a schematic diagram of one embodiment of a high efficiency heat preservation leak proof heat exchanger of the present invention;

FIG. 2 is a cross-sectional view of one embodiment of the high efficiency heat preserving leak proof heat exchanger of the present invention;

FIG. 3 is a schematic view of a first partial structure of one embodiment of the high-efficiency heat-preserving leak-proof heat exchanger of the present invention;

FIG. 4 is a schematic view of a second partial structure of one embodiment of the high efficiency heat preserving and leak preventing heat exchanger of the present invention;

FIG. 5 is a schematic view of the structure of a riser sleeve and a screw member of one embodiment of the high efficiency heat preservation and leak proof heat exchanger of the present invention;

FIG. 6 is a schematic diagram of the operation of a conventional tubular heat exchanger;

FIG. 7 is a schematic diagram of a flow path of a hot and cold fluid in one embodiment of a high efficiency heat preserving leak proof heat exchanger of the present invention;

fig. 8 is a schematic structural view of a baffle plate of one embodiment of the high-efficiency heat-preserving and leakage-preventing heat exchanger of the present invention.

Reference numerals in the figures: 1-base, 2-main casing, 3-connecting piece, 4-auxiliary casing, 5-U nest of tubes, 6-wave shaped board, 7-baffle, 101-cage, 201-marine riser pipe, 301-screw, 01 a-feed liquor cold pipe, 01 b-play liquid cold pipe, 02 a-feed liquor heat pipe, 02 b-play liquid heat pipe, 01-baffle, 001 a-first contact area, 001 b-second contact area.

Detailed Description

The following describes the technical scheme with reference to specific embodiments, and it should be noted that: terms indicating orientations, such as up, down, left, right, etc., are used herein only with respect to the position of the illustrated structure in the corresponding drawings. The parts themselves are numbered herein, for example: first, second, etc. are used solely to distinguish between the described objects and do not have any sequential or technical meaning. And the application is said to be as follows: connection, coupling, unless specifically stated otherwise, includes both direct and indirect connection (coupling).

Example 1

1-2, the high-efficient heat preservation leak protection heat exchanger, including base 1, main casing 2, connecting piece 3, sub-casing 4, U-shaped tube group 5, wave-shaped plate 6 and baffle 7; a main shell 2 is fixedly connected on the base 1; two ends of the main shell 2 are connected with a connecting piece 3 through bolts; the opposite sides of the two connecting pieces 3 are detachably connected with a sub-shell 4 respectively; a U-shaped pipe group 5 is arranged between the two connecting pieces 3, and the U-shaped pipe group 5 is composed of a plurality of U-shaped pipes;

the middle part of the left auxiliary shell 4 is provided with a transverse partition plate to form an upper cavity and a lower cavity, the upper cavity is communicated with the upper square pipe opening of the U-shaped pipe, and the lower cavity is communicated with the lower opening of the U-shaped pipe; the lower part of the left auxiliary shell 4 is communicated with a liquid inlet cold pipe 01a, and the upper part is communicated with a liquid outlet cold pipe 01b; the right sub-shell 4 is used for placing the corner part of the U-shaped pipe; the U-shaped pipe group 5 is fixedly connected with a wave-shaped plate 6; the main shell 2 is fixedly connected with a plurality of baffles 7, the baffles 7 are positioned at the trough of the wavy plate 6, and the bottoms of the baffles 7 are hollow; the middle upper part of the main shell 2 is communicated with a liquid inlet heat pipe 02a; the liquid outlet heat pipe 02b is communicated with the middle lower part of the main shell 2, and the liquid inlet heat pipe 02a is arranged in the middle part, so that the hot fluid can flow from the middle part to two sides, and the direct contact of the cold fluid and the hot fluid at the initial section is avoided, and the pipe explosion is avoided.

Example 2

On the basis of the above embodiment 1, the wavy plates 6 are provided with two groups, which are respectively installed at the upper and lower parts of the U-shaped tube group 5, and the two groups of wavy plates 6 are parallel to each other, so that the hot fluid can be divided into upper and lower layers in the main housing 2, the hot fluid is fully contacted with the U-shaped tube group 5, and when the hot fluid is less, the upper and lower parts of all the U-shaped tubes can be also be submerged, thereby realizing efficient heat exchange.

The working steps of the invention are as follows:

fig. 6 is a schematic diagram of the operation of the conventional tube heat exchanger, which also uses a U-shaped tube to exchange heat, wherein a U-shaped solid line is a U-shaped tube, cold fluid is introduced into the U-shaped tube from top to bottom, and the hot fluid flows to exchange heat with the cold fluid in the U-shaped tube according to a route shown by a wave dotted line in the figure under the action of a baffle 01, which has the following problems: the cold and hot fluid can directly contact in the first contact area 001a, and the U-shaped tube is easy to burst due to the direct action of high and low temperature; when the hot fluid is less, only the baffle plate 01 below can be just used for being fallen, so that the upper part of the U-shaped tube cannot exchange heat.

As shown in fig. 2, cold fluid is first added into the liquid inlet cold pipe 01a, and then flows out of the liquid outlet cold pipe 01b after heat exchange through the U-shaped pipe. Meanwhile, hot fluid is added into the liquid inlet heat pipe 02a, and flows out of the liquid outlet heat pipe 02b after the U-shaped pipe is used up by referring to the wavy flow line in FIG. 7. Thus realizing the heat exchange effect of the hot fluid on the cold fluid in the U-shaped tube.

The liquid inlet heat pipe 02a and the liquid outlet heat pipe 02b are arranged in the middle of the main shell 2, so that the hot fluid is divided into two flows, firstly, the hot fluid flows from the middle to two sides in the upper cavity of the main shell 2 and then flows from two sides to the middle in the lower cavity, and the hot fluid is fully contacted with the U-shaped pipe. When the hot fluid is less, the hot fluid flows to the left or right after the wave crest of the wavy plate 6, and the U-shaped pipe is positioned between the wave crest and the wave trough of the wavy plate 6 completely, so that the hot fluid can be fully contacted, the heat exchange efficiency is ensured, and the problem that part of the U-shaped pipe cannot exchange heat when the hot fluid is less in the prior art is solved. When the hot fluid is sufficient, the baffle 7 is used for blocking the hot fluid in the upper cavity of the main shell 2, and meanwhile, the two wavy plates 6 are used for blocking the hot fluid in the lower cavity of the main shell 2, so that the flow speed of the hot fluid is slowed down, the action effect is strengthened, and the flow schematic diagram shown in fig. 7 is seen.

Referring to fig. 7, by disposing the inlet heat pipe 02a in the middle of the main housing 2, when the hot fluid flows through the second contact region 001b, the temperature is reduced because the hot fluid has acted on the upper portion of the U-shaped pipe for a certain distance, so that the cold and hot fluids are prevented from having a large difference in temperature at the second contact region 001b, resulting in a pipe explosion phenomenon.

It should be noted that, during the initial use stage of the device, when the hot fluid is added, the temperature needs to be reduced to half or lower of the normal working temperature, and then the temperature is gradually increased, so that the phenomenon that the U-shaped tube instantaneously contacts the cold and hot two fluids to cause tube explosion is avoided.

Example 3

As a further embodiment, referring to fig. 4, the U-shaped pipe group 5 further comprises a shielding cover 101, wherein two sides of the upper part of the U-shaped pipe group 5 are respectively provided with a shielding cover 101, and the connection part of the connecting piece 3 and the auxiliary shell 4 is protected through the shielding cover 101, so that leakage caused by the action of hot fluid is avoided.

Referring to fig. 4, there is also included a water blocking pipe sleeve 201, by which the connection member 3 and the U-shaped pipe group 5 are connected.

The middle part of the riser sleeve 201 is provided with a concave area for temporarily storing liquid leakage, and the liquid leakage in the concave area is discharged when the liquid leakage is overhauled and disassembled manually.

The connecting piece 3 is provided with a drain pipe communicated with the concave area, so that leakage can be discharged in real time through the drain pipe.

Referring to fig. 5, each of the U-shaped pipes is provided therein with a spiral member 301 composed of a plurality of spiral strips, and by arranging the spiral member 301 in the U-shaped pipe, the cold fluid flowing in the U-shaped pipe can be dispersed, so that sundries in the cold fluid can be prevented from staying in the U-shaped pipe, and meanwhile, the dispersed cold fluid can fully contact with the inside of the U-shaped pipe, thereby improving the heat exchange effect.

The working steps are as follows: by arranging the isolation cover 101, the hot fluid can be prevented from acting on the connecting part 3 and the auxiliary shell 4, so that the sealing performance of the connecting part is low, and the liquid leakage phenomenon is caused. In addition, even the weeping, the weeping also can be kept in through the sunk area, dismantles discharge or drain pipe discharge through the manual work overhauls, has so guaranteed the normal work of heat exchanger.

Meanwhile, the problem that impurities exist in long-term work of cold fluid in the U-shaped tube is solved, the spiral piece 301 is arranged, so that the cold fluid in the U-shaped tube cannot impact impurities like a smooth pipeline, the spiral piece 301 acts on the cold fluid to spread the impurities in the U-shaped tube, an automatic impurity discharging function is achieved, and after the spiral piece 301 acts on the cold fluid, the cold fluid can fully contact with all parts in the U-shaped tube, so that a heat exchange effect is provided.

Example 4

As a further example, referring to fig. 7, a regulating valve is disposed in the liquid outlet heat pipe 02b, and the hot fluid discharging speed is regulated by the regulating valve, so that a certain liquid level of the hot fluid is left at the bottom of the main casing 2, and the bottom of the main casing 2 is in a high temperature state, thereby efficiently utilizing the hot fluid.

It is to be understood that the above description is intended to be illustrative only and is not intended to be limiting. Those skilled in the art will appreciate variations of the present invention that are intended to be included within the scope of the claims herein.

Claims

1. An efficient heat-preserving and leakage-preventing heat exchanger comprises a base (1), a main shell (2), a connecting piece (3), an auxiliary shell (4), a U-shaped pipe group (5), a wave-shaped plate (6) and a baffle (7); a main shell (2) is fixedly connected on the base (1); two ends of the main shell (2) are fixedly connected with a connecting piece (3); the opposite sides of the two connecting pieces (3) are respectively detachably connected with a subsidiary shell (4); a U-shaped pipe group (5) is arranged between the two connecting pieces (3), and the U-shaped pipe group (5) is composed of a plurality of U-shaped pipes; the middle part of the left auxiliary shell (4) is provided with a transverse partition plate to form an upper cavity and a lower cavity, the upper cavity is communicated with the upper pipe opening of the U-shaped pipe, and the lower cavity is communicated with the lower opening of the U-shaped pipe; the lower part of the left auxiliary shell (4) is communicated with a liquid inlet cold pipe (01 a), and the upper part is communicated with a liquid outlet cold pipe (01 b); the right auxiliary shell (4) is used for placing the corner part of the U-shaped pipe;

it is characterized in that the U-shaped tube group (5) is fixedly connected with a wave-shaped plate (6); the main shell (2) is fixedly connected with a plurality of baffles (7), the baffles (7) are positioned at the trough of the wavy plate (6), and the bottoms of the baffles (7) are hollowed out; the middle upper part of the main shell (2) is communicated with a liquid inlet heat pipe (02 a); the middle lower part of the main shell (2) is communicated with a liquid outlet heat pipe (02 b);

the wave-shaped plates (6) are provided with two groups which are respectively arranged at the upper part and the lower part of the U-shaped tube group (5), and the two groups of wave-shaped plates (6) are mutually parallel and are used for dividing the thermal fluid into an upper layer and a lower layer in the main shell (2);

when heat exchange is performed: the hot fluid flows from the middle part to the two sides in the upper cavity of the main shell (2) and flows from the two sides to the middle part in the lower cavity;

when the quantity of the hot fluid is small, the hot fluid flows to the left or right after the wave crests of the wavy plates (6) are soaked, and the U-shaped pipe group (5) is completely positioned between the wave crests and the wave troughs of the wavy plates (6), so that the hot fluid can be fully contacted;

when the hot fluid is sufficient, the baffle (7) is used for blocking the hot fluid in the upper cavity of the main shell (2), and the two wavy plates (6) are used for blocking the hot fluid in the lower cavity of the main shell (2) so as to lead the flow velocity to be slow and the action effect to be strong;

a spiral piece (301) formed by a plurality of spiral strips is arranged in each U-shaped pipe;

the water isolation pipe comprises a U-shaped pipe group (5) and a water isolation pipe sleeve (201), wherein the U-shaped pipe group (5) is connected with the water isolation pipe sleeve (201);

a concave area is arranged in the middle of the water isolation pipe sleeve (201) and is used for temporarily storing leakage;

the connecting piece (3) is provided with a drain pipe communicated with the concave area.

2. The efficient heat-preserving and leakage-preventing heat exchanger according to claim 1, further comprising an isolation cover (101), wherein two isolation covers (101) are respectively arranged on two sides of the upper part of the U-shaped tube group (5).

3. The efficient heat-preserving and leakage-preventing heat exchanger as claimed in claim 1, wherein the liquid outlet heat pipe (02 b) is internally provided with a regulating valve.