CN216558423U

CN216558423U - Filtering self-cleaning shell-and-tube heat exchanger

Info

Publication number: CN216558423U
Application number: CN202122398503.7U
Authority: CN
Inventors: 杨鹤林; 许超
Original assignee: WUXI LIANYING ELECTRIC POWER EQUIPMENT CO Ltd
Current assignee: WUXI LIANYING ELECTRIC POWER EQUIPMENT CO Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-05-17
Anticipated expiration: 2031-09-30

Abstract

The application belongs to the technical field of heat exchangers, and particularly relates to a filtering self-cleaning shell-and-tube heat exchanger which comprises a shell, a tube body and a stirring head, wherein the tube body and the stirring head are arranged in the shell; the axial direction of the pipe body is parallel to the axial direction of the shell, the axial direction of the stirring head is parallel to the axial direction of the shell, and the stirring head can stir shell-side fluid in the shell under the driving of external force; the shell is also provided with a shell pass fluid inlet, a shell pass fluid outlet, a tube pass fluid inlet and a tube pass fluid outlet; a filter screen is arranged in the shell side fluid inlet. This application makes shell side fluid do whole spiral helicine motion through the setting of stirring head to having strengthened the washing away in shell side fluid to the heat transfer storehouse, having reduced the deposit of filth, and then having reduced the problem that the body pipe wall is covered with the dirt, having guaranteed the heat exchange efficiency of body. Meanwhile, the shell pass fluid is enabled to do overall spiral motion, convection inside the shell pass fluid is promoted, cold and heat exchange inside the shell pass fluid is promoted, and the heat exchange efficiency is improved.

Description

Filtering self-cleaning shell-and-tube heat exchanger

Technical Field

The application belongs to the technical field of the heat exchanger, especially, relate to a filter self-purification shell and tube heat exchanger.

Background

A thermal power plant is a plant that produces electric energy using chemical energy of fuels such as coal, petroleum, natural gas, and the like; a heat exchanger is one of the most commonly used devices in a thermal power plant, and is widely used in a steam turbine, a boiler, and the like of the thermal power plant.

The shell-and-tube heat exchanger mainly comprises a shell, a tube body and the like; the casing is cylindrical more, and the body sets up many, and just sets up inside the casing along the axial direction parallel of casing. Two fluids are used for heat exchange in the shell-and-tube heat exchanger; one of which flows in the tube, the stroke of which is called tube pass, so that the fluid is called tube pass fluid; the other flows inside and outside the tube, and the stroke is called shell pass, so the fluid is called shell pass fluid. The wall surface of the tube body in the shell-and-tube heat exchanger is a heat transfer surface.

However, the inventors found in the study that: as a result, a plurality of dirt is often included in the heat exchange fluid; after the fluid enters the heat exchanger, the dirt is deposited due to the action of gravity; after long-term use, the pipe wall of the pipe body can be full of dirt, so that the heat exchange efficiency is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In order to reduce the deposit of filth in the fluid to reduce the phenomenon that the pipe wall of body is covered with the dirt, this application provides a filter self-purification shell and tube heat exchanger.

The technical scheme adopted by the application is as follows: the utility model provides a filtering self-cleaning shell-and-tube heat exchanger, which comprises a shell, a tube body and a stirring head, wherein the tube body and the stirring head are arranged in the shell;

the axial direction of the pipe body is parallel to the axial direction of the shell, the axial direction of the stirring head is parallel to the axial direction of the shell, and the stirring head can stir shell-side fluid in the shell under the driving of external force;

the shell is also provided with a shell pass fluid inlet, a shell pass fluid outlet, a tube pass fluid inlet and a tube pass fluid outlet; and a filter screen is arranged in the shell-side fluid inlet.

The technical scheme mainly aims at the working condition that the shell pass fluid has more dirt; by adopting the technical scheme, the stirring head stirs the shell pass fluid to form the whole spiral motion; the movement mode is favorable for washing the heat exchange bin by the shell pass fluid and discharging dirt carried by the shell out of the shell, so that the deposition of the dirt is reduced, the phenomenon that the pipe wall of the pipe body is full of the dirt is reduced, and the heat exchange efficiency is ensured. Meanwhile, the spiral motion promotes the convection inside the shell pass fluid, thereby promoting the transmission of heat/cold in the shell pass fluid and further improving the heat exchange efficiency.

In addition, the filter screen is arranged in the shell pass fluid inlet, so that a large amount of dirt in the shell pass fluid can be prevented from entering the heat exchanger, the deposition of the dirt in the fluid on the pipe wall of the pipe body is further reduced, and the phenomenon that the pipe wall is full of dirt is reduced.

As a preferred scheme, the shell is in a capsule shape or a cylinder shape, and the interior of the shell is divided into a tube side fluid inlet and outlet bin, a tube side fluid return bin and a heat exchange bin positioned between the tube side fluid inlet and outlet bin and the tube side fluid return bin through two first partition plates parallel to the radial plane of the shell; the shell side fluid inlet and the shell side fluid outlet are both communicated with the heat exchange bin, the shell side fluid inlet is close to one end, close to the tube side fluid turning-back bin, of the heat exchange bin, and the shell side fluid outlet is close to one end, close to the tube side fluid inlet and outlet bin, of the heat exchange bin;

the tube side fluid inlet and outlet bin is divided into a tube side fluid inlet sub-bin and a tube side fluid outlet sub-bin by a second partition plate parallel to the axial plane of the shell; the tube side fluid inlet is communicated with the tube side fluid inlet sub-bin, and the tube side fluid outlet is communicated with the tube side fluid outlet sub-bin;

the plurality of pipe bodies are arranged and are positioned in the heat exchange bin; one end opening of each pipe body is communicated with the tube side fluid turning-back bin through a communicating hole formed in one first partition plate, and the other end of each pipe body is communicated with a tube side fluid inlet sub-bin or a tube side fluid outlet sub-bin through a communicating hole formed in the other first partition plate;

the stirring head is positioned in the heat exchange bin and connected to the first partition plate close to the tube side fluid turning-back bin.

More preferably, the stirring head is arranged at the center of the first clapboard.

As a more preferable mode, the stirring head is provided in plurality and is symmetrical about the center of the first partition plate.

As a more preferable scheme, the stirring head is driven by a driving motor positioned in the tube side fluid returning cabin.

As a further preferred option, the number of tubes communicating with the tube-side fluid inlet sub-compartment and the number of tubes communicating with the tube-side fluid outlet sub-compartment are the same.

As a preferable scheme, a plurality of through holes are formed in the blades of the stirring head.

The beneficial technical effect of this application lies in: a filtering self-cleaning shell-and-tube heat exchanger is provided. This application makes the shell side fluid do whole heliciform motion through the setting of stirring head to strengthened washing away in the shell side fluid is to the heat transfer storehouse, reduced the deposit of filth, and then reduced the problem that the body pipe wall is covered with the dirt, guaranteed the heat exchange efficiency of body. Meanwhile, the shell pass fluid is enabled to do overall spiral motion, convection inside the shell pass fluid is promoted, cold and heat exchange inside the shell pass fluid is promoted, and heat exchange efficiency is improved. Simultaneously, this application passes through the setting of filter screen, and the possibility that the filth got into this heat exchanger that has significantly reduced to the deposit of filth on the body in the fluid has been reduced.

Drawings

The present application is further described below with reference to the drawings and examples.

Fig. 1 is a schematic view of the internal structure of a filtration self-cleaning shell-and-tube heat exchanger according to example 1 of the present application.

Fig. 2 is a schematic position diagram of the stirring head and the pipe body in embodiment 1 of the present application.

Fig. 3 is a schematic position diagram of the stirring head and the pipe body in embodiment 2 of the present application.

In the figure: the device comprises a shell 1, a first partition plate 11, a tube pass fluid inlet and outlet bin 12, a tube pass fluid inlet and outlet bin 121, a tube pass fluid inlet and outlet bin 122, a tube pass fluid outlet and outlet bin 13, a heat exchange bin 13, a tube pass fluid return bin 14, a second partition plate 15, a shell pass fluid inlet 16, a shell pass fluid outlet 17, a tube pass fluid inlet 18, a tube pass fluid outlet 19, a tube body 2, a stirring head 3, a through hole 31, a filter screen 4 and a driving motor 5.

Detailed Description

The present application will now be described in further detail with reference to the drawings and examples, which are given by way of illustration only and are not intended to be limiting, and the scope of the present application should not be limited thereby. The structures, connections, and methods not described in detail in this application are all understood to be common general knowledge in the art. It should also be noted that the terms "left," "right," "upper," and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Example 1

The embodiment discloses a filtering self-cleaning shell-and-tube heat exchanger mainly used for a thermal power plant. Referring to fig. 1, the filtration self-cleaning shell-and-tube heat exchanger is a horizontal heat exchanger, and comprises a shell 1, a tube body 2, a stirring head 3 and a driving motor 5, wherein the tube body, the stirring head and the driving motor are arranged in the shell.

Referring to fig. 1, the housing 1 is in the form of a capsule (in other embodiments, the housing 1 may also be cylindrical), and two first partition plates 11 are installed inside the housing. Two first baffles 11 are all parallel with the radial plane of casing 1, and separate into independent three storehouses with casing 1 inner space along casing 1's axial, do respectively: a tube side fluid inlet and outlet bin 12 and a tube side fluid return bin 14 respectively positioned at two ends of the shell 1, and a heat exchange bin 13 positioned between the tube side fluid inlet and outlet bin 12 and the tube side fluid return bin 14.

Referring to fig. 1, a shell side fluid inlet 16, a shell side fluid outlet 17, a tube side fluid inlet 18 and a tube side fluid outlet 19 are further formed on the shell 1. The shell-side fluid inlet 16 and the shell-side fluid outlet 17 are both communicated with the heat exchange bin 13, the shell-side fluid inlet 16 is close to one end, close to the tube-side fluid returning bin 14, of the heat exchange bin 13, and the shell-side fluid outlet 17 is close to one end, close to the tube-side fluid inlet and outlet bin 12, of the heat exchange bin 13. Meanwhile, the filter screens 4 are arranged in the shell-side fluid inlet 16 and the tube-side fluid inlet 18 and are used for intercepting dirt in the shell-side fluid and the tube-side fluid and reducing the dirt entering the heat exchanger.

Referring to fig. 1, a second partition 15 parallel to the axial plane of the housing 1 is installed in the tube-side fluid inlet/outlet chamber 12, and the second partition 15 equally divides the tube-side fluid inlet/outlet chamber 12 into two chambers, i.e., a tube-side fluid inlet chamber 121 and a tube-side fluid outlet chamber 122. Wherein the tube-side fluid inlet 18 communicates with the tube-side fluid inlet sub-compartment 121 and the tube-side fluid outlet 19 communicates with the tube-side fluid outlet sub-compartment 122. In addition, in the present embodiment, the tube-side fluid inlet sub-chamber 121 and the tube-side fluid outlet sub-chamber 122 are disposed above and below each other.

Referring to fig. 1, the pipe body 2 is a straight pipe and is provided with a plurality of pipes. Many root canals body 2 all sets up in heat transfer storehouse 13, and the axial of every root canal body 2 all with the axial parallel arrangement of casing 1. Specifically, one end of the pipe body 2 is vertically connected with a first partition plate 11 adjacent to the tube side fluid returning bin 14, and an opening of the end is communicated with the tube side fluid returning bin 14 through a communicating hole (not shown) formed in the first partition plate 11; similarly, the other end of the tube 2 is vertically connected to the first partition 11 adjacent to the tube-side fluid inlet/outlet chamber 12, and the opening of the other end is communicated with the tube-side fluid inlet chamber 121 or the tube-side fluid outlet chamber 122 through a communication hole (not shown) formed in the first partition 11. Thus, the tube-side fluid enters the sub-chamber 121 from the tube-side fluid and enters the tube 2 communicated therewith, and then the tube-side fluid passes through the tube 2 and enters the tube-side fluid returning chamber 14, and the tube-side fluid turns around in the tube-side fluid returning chamber 14 and enters the tube 2 communicated with the tube-side fluid discharge sub-chamber 122, and finally is discharged from the tube-side fluid discharge sub-chamber 122. In the above design, the shell-side fluid is directly folded back in the tube-side fluid folding back bin 14, thereby reducing the use of folding back elbows which are large in manufacturing cost and difficult to clean in the conventional design. Meanwhile, in order to ensure the stability of the flow rate, in the present embodiment, the number of the tube bodies 2 communicating with the tube-side fluid inlet sub-chamber 121 and the number of the tube bodies 2 communicating with the tube-side fluid outlet sub-chamber 122 are set to be the same.

Referring to fig. 1, the stirring head 3 is positioned in the heat exchange bin 13 and is arranged at the center of the first partition plate 11 close to the tube side fluid returning bin 14; the axial direction of the stirring head 3 is parallel to the axial direction of the housing 1. Meanwhile, the driving motor 5 is positioned in the tube-side fluid returning bin 14 and is arranged at the central position of the other side (namely, the side where the stirring head 3 is not arranged) of the first partition plate 11; the output shaft of the drive motor 5 extends in the axial direction of the housing 1. The output shaft of the driving motor 5 passes through the first clapboard 11 and is connected with the rotating shaft of the stirring head 3; under the drive of the drive motor 5, the stirring head 3 rotates and stirs the shell-side fluid in the shell 1, so that the shell-side fluid forms an integral spiral motion; in this state, the shell-side fluid can wash the heat exchange bin 13 and take dirt in the heat exchange bin 13 to be discharged from the shell-side fluid outlet 17, so that the deposition of the dirt on the pipe wall of the pipe body 2 is reduced; meanwhile, the spiral movement also promotes the convection inside the shell pass fluid, so that the heat/cold energy can be better transferred in the shell pass fluid, and the heat exchange efficiency is improved.

Referring to fig. 2, the blades of the stirring head 3 are further provided with a plurality of through holes 31, which is beneficial to improving the stirring degree of the shell-side fluid, and promoting the washing of the shell-side fluid to the heat exchange bin 13 and the convection in the shell-side fluid.

The filtering self-cleaning shell-and-tube heat exchanger of the embodiment mainly aims at the working condition that the shell-side fluid has more dirt; the implementation principle is as follows: the tube pass fluid enters the tube pass fluid from the tube pass fluid inlet 18, enters the sub-bin 121 and then enters the tube body 2 communicated with the tube pass fluid entering the sub-bin 121; then the tube side fluid continues to move forwards, passes through the tube body 2 and enters the tube side fluid returning bin 14; in the tube side fluid returning bin 14, the tube side fluid is prevented from moving and is returned and enters the tube body 2 communicated with the tube side fluid discharging sub-bin 122; the pass fluid passes through the tube 2 into the pass fluid discharge subchamber 122 and is ultimately discharged through the pass fluid outlet 19.

Meanwhile, the shell pass fluid enters the heat exchange bin 13 from the shell pass fluid inlet 16 and contacts with the outer wall of the pipe body 2; the shell-side fluid and the tube-side fluid exchange heat through the heat transfer of the tube body 2; simultaneously, starting the driving motor 5 to drive the stirring head 3 to rotate; the rotating stirring head 3 stirs the shell pass fluid to enable the shell pass fluid to move in an overall spiral shape; the heat exchange bin 13 can be flushed, so that the deposition of dirt in the heat exchange bin 13 is reduced, and the phenomenon that dirt is fully distributed on the pipe wall of the pipe body 2 is reduced; and the convection in the shell pass fluid is also increased, thereby improving the heat exchange effect.

Example 2

The embodiment discloses a filtering self-cleaning shell-and-tube heat exchanger mainly used for a thermal power plant. This embodiment is substantially the same as embodiment 1 except that, referring to fig. 3, the stirring head 3 is provided in two and is symmetrical about the center of the first partition plate 11. The design can improve the stirring of the shell pass fluid, thereby not only improving the effects of carrying dirt and discharging the shell pass fluid, but also improving the transmission of heat/cold in the shell pass fluid and strengthening the heat exchange effect.

It should be noted that the number of the stirring heads 3 can be increased according to actual situations, such as four, eight, etc.; the more the stirring heads 3, the higher the degree of agitation of the shell-side fluid, but the cost increases accordingly, and the flow resistance of the shell-side fluid also increases.

In light of the foregoing description of the preferred embodiments of the present application, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. Filtration self-purification shell-and-tube heat exchanger, its characterized in that: comprises a shell (1), a pipe body (2) and a stirring head (3) which are arranged in the shell;

the axial direction of the pipe body (2) is parallel to the axial direction of the shell (1), the axial direction of the stirring head (3) is parallel to the axial direction of the shell (1), and the stirring head (3) can stir shell-side fluid in the shell (1) under the driving of external force;

the shell (1) is also provided with a shell-side fluid inlet (16), a shell-side fluid outlet (17), a tube-side fluid inlet (18) and a tube-side fluid outlet (19); and a filter screen (4) is arranged in the shell side fluid inlet (16).

2. The filtration self-cleaning shell and tube heat exchanger of claim 1, wherein: the shell (1) is in a capsule shape or a cylinder shape, and the interior of the shell is divided into a tube side fluid inlet and outlet bin (12), a tube side fluid return bin (14) and a heat exchange bin (13) positioned between the tube side fluid inlet and outlet bin and the tube side fluid return bin through two first partition plates (11) parallel to the radial plane of the shell (1); the shell-side fluid inlet (16) and the shell-side fluid outlet (17) are both communicated with the heat exchange bin (13), the shell-side fluid inlet (16) is close to one end, close to the tube-side fluid turning-back bin (14), of the heat exchange bin (13), and the shell-side fluid outlet (17) is close to one end, close to the tube-side fluid in-and-out bin (12), of the heat exchange bin (13);

the tube side fluid inlet and outlet bin (12) is divided into a tube side fluid inlet sub-bin (121) and a tube side fluid outlet sub-bin (122) by a second partition plate (15) parallel to the axial plane of the shell (1); the tube side fluid inlet (18) is communicated with a tube side fluid inlet sub-bin (121), and the tube side fluid outlet (19) is communicated with a tube side fluid outlet sub-bin (122);

the plurality of pipe bodies (2) are arranged and are all positioned in the heat exchange bin (13); one end opening of each pipe body (2) is communicated with the tube side fluid turning-back bin (14) through a communicating hole formed in one first partition plate (11), and the other end of each pipe body is communicated with a tube side fluid inlet sub-bin (121) or a tube side fluid outlet sub-bin (122) through a communicating hole formed in the other first partition plate (11);

the stirring head (3) is positioned in the heat exchange bin (13) and is connected to a first partition plate (11) close to the tube side fluid returning bin (14).

3. The filtration self-cleaning shell and tube heat exchanger of claim 2, wherein: the stirring head (3) is arranged at the center of the first partition plate (11).

4. The filtration self-cleaning shell and tube heat exchanger of claim 2, wherein: the stirring heads (3) are arranged in a plurality of numbers and are symmetrical about the center of the first partition plate (11).

5. A filtration self-cleaning shell and tube heat exchanger according to any one of claims 2-4, characterized in that: the stirring head (3) is driven by a driving motor (5) positioned in the tube side fluid returning bin (14).

6. A filtration self-cleaning shell and tube heat exchanger according to any one of claims 2-4, characterized in that: the number of the tube bodies (2) communicated with the tube side fluid inlet sub-bin (121) is the same as that of the tube bodies (2) communicated with the tube side fluid outlet sub-bin (122).

7. The filtration self-cleaning shell and tube heat exchanger of claim 1, wherein: the blades of the stirring head (3) are also provided with a plurality of through holes (31).