CN219389693U

CN219389693U - Device for enhancing heat transfer of pipe wall

Info

Publication number: CN219389693U
Application number: CN202320857706.4U
Authority: CN
Inventors: 丘敏; 蔡炯; 胡翠卫; 张华锋; 渠涛涛; 徐利军; 金文权; 叶奇峰; 唐志勇; 王建刚
Original assignee: Jiaxing Green Energy Co ltd
Current assignee: Jiaxing Green Energy Co ltd
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-07-21
Anticipated expiration: 2033-04-10

Abstract

The utility model belongs to the field of boiler pipeline equipment, and particularly relates to a device for enhancing heat transfer of a pipe wall, which comprises a pipe screen and a heat transfer component, wherein the pipe screen comprises a straight pipe and a U-shaped elbow, the heat transfer component comprises a first heat transfer element arranged in the straight pipe and a second heat transfer element arranged in the U-shaped elbow, the first heat transfer element comprises a spiral blade, a flow equalizing piece and a disturbance ring, the flow equalizing piece consists of a sealing ring body and a flow equalizing plate body which are integrally formed, the disturbance ring consists of a limiting ring body and a plurality of dividing plates, the second heat transfer element comprises a first pipe body and a second pipe body which are integrally connected, the first pipe body is in a circular pipe shape, the side wall of the first pipe body is in contact with the inner wall of the U-shaped elbow, and the pipe diameter of the second pipe body is gradually reduced in the direction from the first pipe body to the second pipe body; compared with the prior art, the utility model ensures that the smoke flowing through the straight pipe generates vortex motion, thereby enhancing the radial mixing of the smoke, ensuring that the motion speed and the temperature of the smoke are uniformly distributed, and greatly enhancing the heat transfer effect of the pipeline.

Description

Device for enhancing heat transfer of pipe wall

Technical Field

The present utility model relates to boiler tubing equipment, and more particularly, to a device for enhancing heat transfer through a tube wall.

Background

The economizer is a device which is arranged at the lower part of a tail flue of a boiler and is used for recovering the waste heat of discharged smoke, and heats boiler feed water into a heating surface of saturated water under the pressure of a steam drum.

In the working process of the economizer, the flue gas flows in a turbulent state in a pipeline, and ash and dirt are easy to accumulate on the inner wall of the pipeline, so that the heat transfer effect is affected.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a device which can enhance the heat transfer effect of the pipe wall and prevent the inner wall of the pipe from accumulating ash.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a device for enhancing heat transfer of pipe wall comprises a pipe screen and a heat transfer component, wherein the pipe screen comprises a straight pipe and a U-shaped elbow, the heat transfer component comprises a first heat transfer element arranged in the straight pipe and a second heat transfer element arranged in the U-shaped elbow,

the first heat transfer element comprises a spiral blade, a flow equalizing plate and a disturbing ring, wherein the flow equalizing plate and the disturbing ring are respectively fixed at two ends of the spiral blade, the flow equalizing plate consists of a sealing ring body and a flow equalizing plate body which are integrally formed, the flow equalizing plate body is provided with a plurality of through holes which are uniformly distributed, the side wall of the sealing ring body is abutted against the inner wall of the straight pipe, the disturbing ring consists of a limiting ring body and a plurality of dividing plates, the dividing plates are uniformly distributed around the spiral blade, and the dividing plates are connected with the limiting ring body and the spiral blade;

the second heat transfer element comprises a first pipe body and a second pipe body which are integrally connected, the first pipe body is in a circular pipe shape, the side wall of the first pipe body is in contact with the inner wall of the U-shaped elbow, and the pipe diameter of the second pipe body is gradually reduced in the direction from the first pipe body to the second pipe body.

Further, the end of the U-shaped elbow is inserted into the straight pipe, the outer wall of the U-shaped elbow is provided with a positioning ring which is abutted against the end part of the straight pipe, and the limiting ring body corresponds to the end part of the U-shaped elbow.

Further, the axial directions of the spiral blade and the straight pipe are the same, and a plurality of hole groups are formed in the spiral blade.

Further, the dividing plates are all vertical.

Further, the pipe orifice of the second pipe body faces to the bottom of the U-shaped elbow, and the pipe orifice of the second pipe body faces to the flow direction of the flue gas.

By adopting the technical scheme, the utility model has the beneficial effects that:

1. the first heat transfer element is arranged in the straight pipe, so that the smoke flowing through the straight pipe generates vortex motion, radial mixing of the smoke is enhanced, the motion speed and the temperature of the smoke are uniformly distributed, and the heat transfer effect of the straight pipe is greatly enhanced; meanwhile, the smoke drives suspended particles attached in the smoke to perform forced rotary motion, so that contact with the inner wall of the straight pipe is greatly reduced, and ash and dirt are not easy to accumulate on the inner wall of the straight pipe;

2. the second heat transfer element is arranged in the U-shaped bent pipe at the bottom of the pipe screen, and when flue gas passes through the second heat transfer element, the diameter of the second pipe body is gradually reduced, so that the flue gas blown out by the second heat transfer element is faster under the action of pressure difference, the bottom of the U-shaped bent pipe is flushed, and the difficulty in accumulating ash and dirt in the U-shaped bent pipe is further ensured.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is a schematic view of a partial cross-sectional structure of an embodiment of the present utility model.

Fig. 3 is a schematic structural view of the first heat transfer member.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The device for enhancing the heat transfer of the pipe wall comprises a pipe screen and a heat transfer component, wherein the pipe screen comprises a straight pipe 1 and a U-shaped elbow 2, and the heat transfer component comprises a first heat transfer element 3 arranged in the straight pipe 1 and a second heat transfer element 4 arranged in the U-shaped elbow 2.

The first heat transfer element 3 comprises a spiral blade 31, a flow equalizing sheet 32 and a disturbing ring 33, the axial directions of the spiral blade 31 and the straight pipe 1 are the same, and a plurality of hole groups 301 are formed on the spiral blade 31; the flow equalizing plate and the disturbance ring 33 are respectively fixed at two ends of the helical blade 31, the flow equalizing plate 32 is composed of a sealing ring body 32a and a flow equalizing plate body 32b which are integrally formed, a plurality of uniformly arranged through holes are formed in the flow equalizing plate body 32b, the disturbance ring 33 is composed of a limiting ring body 33a and a plurality of vertically-shaped dividing plates 33b, the plurality of dividing plates 33b are uniformly arranged around the helical blade 31, and the dividing plates 33b are connected with the limiting ring body 33a and the helical blade 31; the side wall of the sealing ring body 32a is abutted against the inner wall of the straight pipe 1, the end head of the U-shaped elbow 2 is inserted into the straight pipe 1, the outer wall of the U-shaped elbow 2 is provided with a positioning ring 21 abutted against the end part of the straight pipe 1, and the limiting ring body 33 a/the sealing ring body 32a corresponds to the end part of the U-shaped elbow 2.

When the flue gas flows in the straight pipe 1 of the pipe screen, the flue gas always sequentially passes through the flow equalizing sheets 32, the spiral blades 31 and the disturbance ring 33, and the uniformly distributed through holes on the flow equalizing sheets 32 guide the flue gas flowing through and guide the flue gas to the spiral blades 31; after the flue gas flows through the spiral blades 31, the flue gas generates vortex motion, so that radial mixing of the flue gas is enhanced, the motion speed and the temperature of the flue gas are uniformly distributed, and the flue gas drives suspended particles attached to the flue gas to perform forced rotation motion, so that contact with the inner wall of the straight pipe 1 is greatly reduced; the flue gas finally passes through the disturbance ring 33, and a plurality of uniformly arranged partition plates 33b partition the flowing flue gas in the transverse direction, so that the disturbance to the flue gas is realized, and the heat transfer effect of the tube panel is further enhanced; the opening of the hole group 301 on the spiral blade 31 ensures that suspended particles carried by the flue gas pass through and are not easy to adhere to the suspended particles, and meanwhile, the disturbance to the flue gas is further realized;

when the first heat transfer element 3 is placed in the straight pipe 1, the first heat transfer element is placed on the end part of the U-shaped elbow 2 under the action of gravity, namely the limit ring body 33a or the seal ring body 32a is abutted against the end part of the U-shaped elbow 2; after the U-shaped elbow 2 at the bottom of the tube panel is spliced with the straight tube 1, the U-shaped elbow and the straight tube can be connected in a welding mode and the like, so that the sealing performance of the tube panel is ensured.

The second heat transfer element 4 comprises a first pipe body 41 and a second pipe body 42 which are integrally connected, the first pipe body 41 is in a circular pipe shape, the side wall of the first pipe body 41 is in contact with the inner wall of the U-shaped elbow 2, the pipe diameter of the second pipe body 42 is gradually reduced in the direction from the first pipe body 41 to the second pipe body 42, the pipe opening of the second pipe body 42 faces the bottom of the U-shaped elbow 2, and the pipe opening of the second pipe body 42 faces the flow direction of flue gas.

When the flue gas passes through the second heat transfer element 4, the diameter of the second pipe body 42 is gradually reduced, so that the speed of the flue gas blown out by the second heat transfer element is higher under the action of pressure difference, the bottom of the U-shaped bent pipe is flushed, and the difficulty in depositing ash and dirt in the U-shaped bent pipe is further ensured.

The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model, but one skilled in the art can make common changes and substitutions within the scope of the technical solution of the present utility model.

Claims

1. The device for enhancing the heat transfer of the pipe wall comprises a pipe screen and a heat transfer component, and is characterized in that the pipe screen comprises a straight pipe (1) and a U-shaped elbow (2), the heat transfer component comprises a first heat transfer element (3) arranged in the straight pipe (1) and a second heat transfer element (4) arranged in the U-shaped elbow (2),

the first heat transfer element (3) comprises a spiral blade (31), a flow equalizing sheet (32) and a disturbance ring (33), wherein the flow equalizing sheet (32) and the disturbance ring (33) are respectively fixed at two ends of the spiral blade (31), the flow equalizing sheet (32) is composed of a sealing ring body (32 a) and a flow equalizing plate body (32 b) which are integrally formed, a plurality of uniformly arranged through holes are formed in the flow equalizing plate body (32 b), the side wall of the sealing ring body (32 a) is abutted against the inner wall of the straight pipe (1), the disturbance ring (33) is composed of a limiting ring body (33 a) and a plurality of partition plates (33 b), the partition plates (33 b) are uniformly distributed around the spiral blade (31), and the partition plates (33 b) are connected with the limiting ring body (33 a) and the spiral blade (31);

the second heat transfer element (4) comprises a first pipe body (41) and a second pipe body (42) which are integrally connected, the first pipe body (41) is in a circular pipe shape, the side wall of the first pipe body (41) is in contact with the inner wall of the U-shaped elbow (2), and the pipe diameter of the second pipe body (42) is gradually reduced in the direction from the first pipe body (41) to the second pipe body (42).

2. The device for enhancing heat transfer of pipe wall according to claim 1, wherein the end of the U-shaped elbow (2) is inserted into the straight pipe (1), a positioning ring (21) which is abutted against the end of the straight pipe (1) is arranged on the outer wall of the U-shaped elbow (2), and the limiting ring body (33 a) corresponds to the end of the U-shaped elbow (2).

3. A device for enhancing heat transfer of a pipe wall according to claim 2, wherein the axial directions of the spiral blade (31) and the straight pipe (1) are the same, and a plurality of hole groups (301) are formed on the spiral blade (31).

4. A device for enhancing heat transfer through a pipe wall according to claim 2, characterized in that the dividing plates (33 b) are each vertical.

5. A device for enhancing heat transfer through a pipe wall according to claim 2, wherein the pipe mouth of the second pipe body (42) is directed towards the bottom of the U-bend (2), and the pipe mouth of the second pipe body (42) is directed in the flow direction of the flue gas.

6. A device for enhancing heat transfer through a pipe wall according to claim 1, characterized in that the sealing ring (32 a) corresponds to the end of the U-bend (2).