CN219414854U

CN219414854U - Heat transfer pipe and air preheater composed of same

Info

Publication number: CN219414854U
Application number: CN202320051704.6U
Authority: CN
Inventors: 马雷
Original assignee: Shanghai Fuwang Furnace Co ltd
Current assignee: Shanghai Fuwang Furnace Co ltd
Priority date: 2023-01-09
Filing date: 2023-01-09
Publication date: 2023-07-25
Anticipated expiration: 2033-01-09

Abstract

The utility model discloses a heat transfer tube and an air preheater composed of the same, comprising: the heat transfer tube comprises two heat transfer plates which are arranged in a superimposed manner, wherein four sides of the two heat transfer plates are fixedly connected through two L-shaped connecting plates, the outer sides of the heat transfer plates are provided with sealing plates, the sealing plates are connected with an external frame, a plurality of heat transfer channels for fluid medium to circulate are formed between the two heat transfer plates, a plurality of raised ridges are arranged on the heat transfer plates at equal intervals, each raised ridge forms a pit on the back, the raised directions of the two adjacent raised ridges are opposite, and the height of each raised ridge is not more than 1/2 of the height of the heat transfer channel. The raised ridges increase the disturbance to the fluid and provide good heat transfer performance.

Description

Heat transfer pipe and air preheater composed of same

Technical Field

The utility model relates to the technical field of preheaters, in particular to a heat transfer tube and an air preheater composed of the same.

Background

An air preheater is widely used in the current industrial furnace flue gas waste heat recovery system to recover the flue gas waste heat so as to achieve the purposes of energy conservation and emission reduction, and the cast iron plate-fin type air preheater has good heat transfer and certain corrosion resistance, and is more applied to occasions with lower flue gas temperature (more than or equal to 120 ℃).

The heat transfer substrate of the cast iron plate fin type air preheater is cast with densely arranged fins, so that the heat transfer area of the cast iron plate fin type air preheater is increased, the heat exchange capacity is improved, the fluid flow resistance on two sides is high, and the load of a fan is increased; in addition, the presence of fins makes the preheater heavier and increases the heat transfer path.

Disclosure of Invention

The utility model aims at the defects of the prior art, and provides a heat transfer tube and an air preheater composed of the heat transfer tube, wherein the shape of the raised ridge ensures that fluid at two sides flows without dead angles, the flow resistance is greatly reduced, and the power consumption is saved; the convex ridges are convex towards one side and form pits on the other side, so that the heat transfer path is greatly reduced; the disturbance effect on the fluid is increased, and the heat transfer performance is good.

In order to solve the technical problems, the utility model adopts a technical scheme that the heat transfer tube and the air preheater composed of the heat transfer tube comprise: the heat transfer plate that two stacks set up, the four sides of two heat transfer plates are connected fixedly through two "L" type connecting plates, the outside of heat transfer plate is provided with the shrouding, the shrouding is connected with external frame, is formed with a plurality of heat transfer channels that supply the fluid medium to circulate between two heat transfer plates, equidistant arrangement is provided with a plurality of protruding ridges on the heat transfer plate, and every protruding ridge forms the pit at the back, and the protruding direction of two adjacent protruding ridges is opposite, protruding ridge highly be not more than 1/2 of heat transfer channel height.

In a preferred embodiment of the utility model, two of said heat transfer plates are connected by welding or adhesive bonding.

In a preferred embodiment of the present utility model, four sides of two heat transfer plates are provided with extending connecting edges, a plurality of bolt holes are formed on the extending connecting edges, and the two heat transfer plates are connected through the bolt holes by bolts or rivets.

In a preferred embodiment of the utility model, a gasket is arranged between the extending connecting edges of the heat transfer plates.

In a preferred embodiment of the utility model, the spacer is a fibrous tape, a fibrous sheet, a graphite mat or a tetrafluoro mat.

In a preferred embodiment of the present utility model, the cross-sectional shape of the raised ridge is a truncated cone shape or an oval truncated cone shape.

In a preferred embodiment of the utility model, the heat transfer plate material may be castable metal.

The beneficial effects of the utility model are as follows: the heat transfer tube and the air preheater formed by the heat transfer tube ensure that fluid at two sides flows without dead angles due to the shape of the raised ridges, so that the flow resistance is greatly reduced, and the power consumption is saved; the convex ridges are convex towards one side and form pits on the other side, so that the heat transfer path is greatly reduced; the disturbance effect on the fluid is increased, and the heat transfer performance is good.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic view of an air preheater formed by a heat transfer tube of the present utility model;

FIG. 2 is a schematic view of a heat transfer tube and its constituent air preheater according to the present utility model;

FIG. 3 is a schematic view of A-A of FIG. 2;

fig. 4 is a schematic view of B-B in fig. 2.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments 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.

Referring to fig. 1 to 4, a heat transfer tube and an air preheater composed of the same according to the present utility model comprises: the heat transfer plate 1 of two stack settings is passed, the four sides of two heat transfer plates are connected fixedly through two "L" connecting plates 2, be formed with a plurality of heat transfer channels 3 that supply the fluid medium to circulate between two heat transfer plates, the outside of heat transfer plates is provided with shrouding 4, the shrouding is connected with external frame 5, a plurality of heat transfer channels and shrouding constitute the heat transfer core, an air heater is constituteed jointly to single or a plurality of heat transfer core and outside braced frame, equidistant arrangement has a plurality of protruding ridges 6 on the heat transfer plate, every protruding ridge forms pit 7 at the back, the protruding direction of two adjacent protruding ridges is opposite, the cross-section shape of protruding ridge is round platform form or oval platform form, the height of protruding ridge is not greater than 1/2 of heat transfer channel height, the shape of protruding ridge makes both sides fluid flow no dead angle, flow resistance reduces greatly, save power consumption.

Specifically, two heat transfer plates are connected by welding or bonding, in the specific embodiment of the utility model, four sides of the two heat transfer plates are provided with extension connecting edges 8, the extension connecting edges are bent and extended towards the direction of the raised ridge at two sides of the heat transfer plates and are provided with straight edges, the extension connecting edges are provided with a plurality of bolt holes 9, the two heat transfer plates are connected by penetrating the bolt holes through bolts or rivets, a gasket 10 or other materials which can be used as gaskets are arranged between the extension connecting edges of the two heat transfer plates, and the gaskets are fiber belts, fiber plates, graphite gaskets or tetrafluorogaskets.

Specifically, the heat transfer plate may be made of castable metal, including but not limited to cast iron (gray cast iron, spheroidal graphite cast iron, etc.), cast steel, cast aluminum, or high polymer; may be any suitable material suitable for additive manufacturing.

The beneficial effects of the utility model are as follows: the heat transfer tube and the air preheater formed by the heat transfer tube have no extra fins, the weight is greatly reduced, the production cost is reduced, the shape of the raised ridge ensures that fluid at two sides flows without dead angles, the flow resistance is greatly reduced, and the power consumption is saved; the convex ridges are convex towards one side and form pits on the other side, so that the heat transfer path is greatly reduced; the disturbance effect on the fluid is increased, and the heat transfer performance is good.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present utility model.

Claims

1. A heat transfer tube and an air preheater comprising the same, comprising: the heat transfer plate that two stacks set up, the four sides of two heat transfer plates are connected fixedly through two "L" type connecting plates, the outside of heat transfer plate is provided with the shrouding, the shrouding is connected with external frame, is formed with a plurality of heat transfer channels that supply the fluid medium to circulate between two heat transfer plates, equidistant arrangement is provided with a plurality of protruding ridges on the heat transfer plate, and every protruding ridge forms the pit at the back, and the protruding direction of two adjacent protruding ridges is opposite, protruding ridge highly be not more than 1/2 of heat transfer channel height.

2. A heat transfer tube and its constituent air preheater as set forth in claim 1, wherein two of said heat transfer plates are joined by welding or bonding.

3. The heat transfer tube and the air preheater comprising the same according to claim 1, wherein the four sides of two heat transfer plates are provided with extension connecting edges, a plurality of bolt holes are formed in the extension connecting edges, and the two heat transfer plates are connected through the bolt holes by bolts or rivets.

4. A heat transfer tube and its associated air preheater as set forth in claim 3, wherein a gasket is disposed between the extending connecting edges of the two heat transfer plates.

5. A heat transfer tube and its constituent air preheater as set forth in claim 4, wherein said gasket is a fiber band, a fiber plate, a graphite mat or a tetrafluoro mat.

6. A heat transfer tube and its constituent air preheater as set forth in claim 1, wherein said raised ridges have a truncated cone-like or oval truncated cone-like cross-sectional shape.

7. A heat transfer tube and air preheater comprising same as recited in claim 1, wherein said heat transfer plate is a castable metal.