CN111197933A - Waste heat step recovery flue heat exchange tube - Google Patents
Waste heat step recovery flue heat exchange tube Download PDFInfo
- Publication number
- CN111197933A CN111197933A CN202010060588.5A CN202010060588A CN111197933A CN 111197933 A CN111197933 A CN 111197933A CN 202010060588 A CN202010060588 A CN 202010060588A CN 111197933 A CN111197933 A CN 111197933A
- Authority
- CN
- China
- Prior art keywords
- flue
- heat conducting
- wall
- heat
- arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 45
- 239000002918 waste heat Substances 0.000 title claims abstract description 45
- 238000009413 insulation Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a waste heat stepped recovery flue heat exchange tube which comprises a flue, wherein a waste heat recovery tube is sleeved outside the flue, the waste heat recovery tube and the flue are arranged coaxially, an annular waste heat recovery channel is formed between the waste heat recovery tube and the flue, and a heat insulation layer is arranged on the outer wall of the waste heat recovery tube; the outer wall of the flue is provided with a plurality of heat conduction fin groups; the heat conduction fin groups are uniformly distributed on the outer wall of the flue; the heat conducting sheet set comprises a pair of arc-shaped heat conducting sheets, the surface, protruding outwards, of each arc-shaped heat conducting sheet faces towards the outer wall of the flue, the arc-shaped heat conducting sheets are symmetrically arranged, one ends of the arc-shaped heat conducting sheets are fixed ends, the fixed ends are fixedly connected to the outer wall of the flue, the other ends of the arc-shaped heat conducting sheets are free ends, the free ends are far away from the outer wall of the flue and point to the waste heat recovery pipe, a gap is reserved between the free ends and the inner wall of the waste heat. The heat-conducting fin group is arranged, so that the heat exchange efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of waste heat recovery, and particularly relates to a waste heat stepped recovery flue heat exchange tube.
Background
The heating furnace is main energy consumption equipment of iron and steel enterprises, and the smoke exhaust temperature of the heating furnace can be greatly reduced and the heat efficiency of the heating furnace is improved by adopting a smoke waste heat recovery technology. The heat exchange of the existing waste heat step recovery flue mainly utilizes the principle of a heat exchanger and the heat transfer of an internal flue. But the flue heat transfer efficiency is lower, can not in time conduct the outside waste heat recovery passageway with the heat.
Disclosure of Invention
Aiming at the technical problem, the invention provides a waste heat stepped recovery flue heat exchange tube which can improve the heat exchange efficiency.
The specific technical scheme is as follows:
the waste heat stepped recovery flue heat exchange tube comprises a flue, wherein a waste heat recovery tube is sleeved outside the flue, the waste heat recovery tube and the flue are arranged coaxially, an annular waste heat recovery channel is formed between the waste heat recovery tube and the flue, and a heat insulation layer is arranged on the outer wall of the waste heat recovery tube;
the outer wall of the flue is provided with a plurality of heat conduction fin groups; the heat conduction fin groups are uniformly distributed on the outer wall of the flue;
the heat conducting sheet group comprises a pair of arc-shaped heat conducting sheets, one surface of each arc-shaped heat conducting sheet, which protrudes outwards, faces towards the outer wall of the flue, the pair of arc-shaped heat conducting sheets are symmetrically arranged, one end of each arc-shaped heat conducting sheet is a fixed end, the fixed end is fixedly connected to the outer wall of the flue, the other end of each arc-shaped heat conducting sheet is a free end, the free end is far away from the outer wall of the flue and points to the waste heat recovery pipe, a gap is reserved between the inner wall of the free end and.
The heat recovery device further comprises a U-shaped heat conducting fin, wherein the U-shaped heat conducting fin is positioned between the pair of arc-shaped heat conducting fins of the heat conducting fin group, the opening of the U-shaped heat conducting fin faces the inner wall of the waste heat recovery pipe, the two ends of the opening of the U-shaped heat conducting fin are respectively fixedly connected with the free ends of the pair of arc-shaped heat conducting fins, and the bottom of the U-shaped heat conducting fin is fixed on the outer wall of the flue.
Preferably, a heat conduction net is filled between the pair of arc-shaped heat conduction sheets and the middle U-shaped heat conduction sheet, and the heat conduction net is perpendicular to the axial lead of the flue.
The waste heat stepped recovery flue heat exchange tube provided by the invention has the advantage that the heat exchange efficiency is improved by arranging the heat conduction fin group.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a partially enlarged schematic view of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Wherein like reference numerals refer to like parts throughout.
In addition, if a detailed description of the known art is not necessary to show the features of the present invention, it is omitted. It should be noted that the terms "front," "back," "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.
It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the waste heat stepped recovery flue heat exchange tube comprises a flue 1, a waste heat recovery tube 2 is sleeved outside the flue 1, the waste heat recovery tube 2 and the flue 1 are arranged coaxially, an annular waste heat recovery channel is formed between the waste heat recovery tube 2 and the flue 1, and an insulating layer 3 is arranged on the outer wall of the waste heat recovery tube 2;
the outer wall of the flue 1 is provided with a plurality of heat conduction fin groups; the heat conduction fin groups are uniformly distributed on the outer wall of the flue 1;
the heat conducting sheet group include a pair of arc heat conducting sheet 4, the one side of 4 evaginations of every arc heat conducting sheet is towards 1 outer wall of flue, a pair of arc heat conducting sheet 4 symmetry sets up, and the one end of arc heat conducting sheet 4 is the stiff end, stiff end fixed connection at 1 outer wall of flue, the other end is the free end, the free end is kept away from 1 outer wall of flue and is pointed to waste heat recovery pipe 2, leaves the clearance between the inner wall of free end and waste heat recovery pipe 2, leaves the clearance between 4 free ends of a pair of arc heat conducting sheet.
As shown in fig. 2, the flue gas waste heat recovery device further comprises a U-shaped heat conducting fin 5, the U-shaped heat conducting fin 5 is located between the pair of arc-shaped heat conducting fins 4 of the heat conducting fin group, the opening of the U-shaped heat conducting fin 5 faces the inner wall of the waste heat recovery pipe 2, two ends of the opening of the U-shaped heat conducting fin 5 are respectively fixedly connected with the free ends of the pair of arc-shaped heat conducting fins 4, and the bottom of the U-shaped heat conducting fin 5 is fixed on the outer wall of the.
And a heat conduction net 8 is filled between the pair of arc-shaped heat conduction sheets 4 and the middle U-shaped heat conduction sheet 5, and the heat conduction net 8 is vertical to the axial lead of the flue 1.
This heat conduction piece group mainly increases heat conduction efficiency through two aspects:
firstly, the heat transfer area is increased, and the heat transfer contact surface is increased through the arc-shaped heat conducting fins 4 and the U-shaped heat conducting fins 5 and is larger than the surface heat diffusion area of the flue 1.
Secondly, a large U-shaped heat conduction space 7 is formed between adjacent arc-shaped radiating fins 4, the arc-shaped radiating fins 4 are mainly used for heating a cold air source, small U-shaped heat conduction spaces 6 are formed in the U-shaped heat conducting fins 5, the space is small, particularly, the opening distance of the U-shaped heat conducting fins 5 can be smaller than the width of the bottoms of the U-shaped heat conducting fins 5, the bottoms of the U-shaped heat conducting fins 5 are in contact heat conduction with a flue 1, therefore, the air temperature at the bottoms of the U-shaped heat conducting fins 5 is high, the small U-shaped heat conduction spaces 6 can form a chimney structure, a chimney effect is generated, hot air flows towards the bottoms of the U-shaped heat conducting fins 5 to the large U-shaped heat conduction spaces 7 from the openings, the air in the large U-shaped heat conduction spaces 7 is disturbed.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.
Claims (3)
1. The waste heat stepped recovery flue heat exchange tube comprises a flue, wherein a waste heat recovery tube is sleeved outside the flue, the waste heat recovery tube and the flue are arranged coaxially, an annular waste heat recovery channel is formed between the waste heat recovery tube and the flue, and a heat insulation layer is arranged on the outer wall of the waste heat recovery tube;
the heat-conducting plate is characterized in that a plurality of heat-conducting fin groups are arranged on the outer wall of the flue; the heat conduction fin groups are uniformly distributed on the outer wall of the flue;
the heat conducting sheet group comprises a pair of arc-shaped heat conducting sheets, one surface of each arc-shaped heat conducting sheet, which protrudes outwards, faces towards the outer wall of the flue, the pair of arc-shaped heat conducting sheets are symmetrically arranged, one end of each arc-shaped heat conducting sheet is a fixed end, the fixed end is fixedly connected to the outer wall of the flue, the other end of each arc-shaped heat conducting sheet is a free end, the free end is far away from the outer wall of the flue and points to the waste heat recovery pipe, a gap is reserved between the inner wall of the free end and.
2. The stepped waste heat recovery flue heat exchange tube of claim 1, further comprising a U-shaped heat conducting fin, wherein the opening of the U-shaped heat conducting fin faces the inner wall of the waste heat recovery tube, the U-shaped heat conducting fin is located between the pair of arc-shaped heat conducting fins of the heat conducting fin set, both ends of the opening of the U-shaped heat conducting fin are fixedly connected with the free ends of the pair of arc-shaped heat conducting fins respectively, and the bottom of the U-shaped heat conducting fin is fixed on the outer wall of the flue.
3. The stepped waste heat recovery flue heat exchange tube of claim 2, wherein a heat conducting mesh is filled between the pair of arc-shaped heat conducting fins and the middle U-shaped heat conducting fin, and the heat conducting mesh is perpendicular to the axial line of the flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010060588.5A CN111197933A (en) | 2020-01-19 | 2020-01-19 | Waste heat step recovery flue heat exchange tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010060588.5A CN111197933A (en) | 2020-01-19 | 2020-01-19 | Waste heat step recovery flue heat exchange tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111197933A true CN111197933A (en) | 2020-05-26 |
Family
ID=70744893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010060588.5A Pending CN111197933A (en) | 2020-01-19 | 2020-01-19 | Waste heat step recovery flue heat exchange tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111197933A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112573561A (en) * | 2020-12-08 | 2021-03-30 | 萍乡宝海锌营养科技有限公司 | Waste heat recovery device for zinc sulfate production |
-
2020
- 2020-01-19 CN CN202010060588.5A patent/CN111197933A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112573561A (en) * | 2020-12-08 | 2021-03-30 | 萍乡宝海锌营养科技有限公司 | Waste heat recovery device for zinc sulfate production |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200526 |