CN111551062A - Tubular heat exchanger for waste heat recovery - Google Patents
Tubular heat exchanger for waste heat recovery Download PDFInfo
- Publication number
- CN111551062A CN111551062A CN202010344560.4A CN202010344560A CN111551062A CN 111551062 A CN111551062 A CN 111551062A CN 202010344560 A CN202010344560 A CN 202010344560A CN 111551062 A CN111551062 A CN 111551062A
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- exchange tube
- heat exchanger
- heat
- tube
- 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
Images
Classifications
-
- 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
- F28F1/14—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 and extending longitudinally
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a tubular heat exchanger for waste heat recovery, which structurally comprises a heat exchange tube bundle, wherein longitudinal fins are arranged on the surface of the heat exchange tube. When the flue gas containing particles flows through the surface of the heat exchange tube, a wake zone filled with vortexes appears at the rear part of the cylindrical tube, and the wake zone can influence the movement of the particles, so that after part of the particles move to the heat exchange tube along with the fluid, the particle speed is reduced in the process, and the particles are easy to deposit when reaching the heat exchange surface. After the longitudinal fins are added to the rear part of the heat exchange tube, the fins can prevent a wake flow area from appearing, so that the deposition of particles in flue gas on the surface of the heat exchanger is effectively reduced, the heat exchange area and the heat exchange efficiency of the heat exchanger are improved, and the heat exchanger can run efficiently in a flue gas environment for a long time. In addition, the invention has simple structure and is easy to implement in practical application.
Description
Technical Field
The invention relates to the technical field of heat exchangers, in particular to a tubular heat exchanger for waste heat recovery.
Background
Statistically, in China, industrial energy consumption accounts for over 70% of the total energy consumption, about 60% of which is converted into waste heat at different temperatures, and about 60% of which can be recycled. To utilize the waste heat, heat exchange devices are typically used to recover the waste heat. The heat exchanger is energy-saving equipment for realizing heat transfer between materials between two or more than two fluids with different temperatures, transfers the heat of the fluid with higher temperature to the fluid with lower temperature, and is one of main equipment for improving the energy utilization rate.
The hot air flow in the flue is the largest and most easily obtained recovered waste heat source, and during the process of recovering waste heat from the flue gas, the heat exchanger runs for a long time, so that solid particles in the flue gas easily form local deposition in the heat exchanger, thereby reducing the heat exchange efficiency and increasing the pressure drop. At present, the heat exchangers in widespread use are shell-and-tube heat exchangers, generally consisting of a cylindrical tube bundle. Therefore, if a fin arrangement mode with a simple structure and a mature process can be developed, the heat exchange area of the fin arrangement mode is increased, and meanwhile, the deposition rate of particles is effectively reduced, and the fin arrangement mode has important significance for practical engineering application.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to provide a tubular heat exchanger, which can effectively reduce the deposition rate of solid particles in flue gas on the surface of the heat exchanger and improve the heat exchange area and the heat exchange efficiency of the heat exchanger, so that the heat exchanger can be operated efficiently in a flue gas environment for a long time.
In order to realize the purpose of the invention, the technical scheme provided by the invention is as follows:
the utility model provides a tubular heat exchanger for waste heat recovery, includes the heat exchange tube bundle of vertical setting, the vertical fin that the surface of arbitrary heat exchange tube all arranged, vertical fin is two, for the flue gas incoming flow direction, installs the rear portion of heat exchange tube, and respectively in the both sides of heat exchange tube axis, wherein, the hot-fluid that contains the particulate matter is flowed through to the outside of heat exchange tube, and inside cold fluid that does not contain the particulate matter flows through.
Wherein the included angle between the two longitudinal fins ranges from 0 degree to 10 degrees.
The length of the longitudinal fin is equal to that of the heat exchange tube.
Wherein the intersection line of the outer surface of the longitudinal fin and the heat exchange tube forms an included angle theta of 15-45 degrees relative to the heat exchange tube.
The transverse space of the heat exchange tube bundle is the same as the longitudinal space of the heat exchange tube bundle, and the transverse space and the longitudinal space of the heat exchange tube bundle are both twice of the external diameter of the heat exchange tube (1).
When flue gas containing particles flows through the surface of the heat exchange tube in the prior art, a wake zone filled with vortexes appears at the rear part of the heat exchange tube, the wake zone can influence the movement of the particles, particularly the particles with small diameters (less than 1 mu m), so that after part of the particles move to the heat exchange tube along with the fluid, the particle speed is reduced in the process, and the particles are easy to deposit when reaching the heat exchange surface.
According to the invention, after the longitudinal fins are added at the rear part of the heat exchange tube, the longitudinal fins can prevent the appearance of a wake flow area, so that the deposition of particles in the flue gas on the surface of the heat exchanger is effectively reduced. The heat exchanger can run for a long time under the condition of flue gas, the cleaning times of the heat exchanger are reduced, and the service life of the heat exchanger is prolonged; meanwhile, the longitudinal fins are added, so that the heat exchange area of the heat exchanger is increased, and the heat exchange efficiency is improved.
Numerical simulation shows that compared with the traditional round tube heat exchanger, the invention reduces the particle deposition rate by more than 30%, improves the heat exchange quantity by more than 15%, and improves the heat exchange performance while reducing particle deposition. In addition, the fin arrangement mode of the tubular heat exchanger is simple in structure and easy to implement in practical application.
Drawings
FIG. 1 is a first schematic view of the construction of one example of a heat exchange tube of the present invention;
reference numerals in fig. 1: 1-heat exchange tube; 2-longitudinal fins.
FIG. 2 is a second schematic view of the construction of one example of a heat exchange tube of the present invention; (ii) a
Reference numerals in fig. 2: theta is the included angle between the intersection line of the outer surface of the fin and the heat exchange tube; d-diameter of the heat exchange tube; h 1-transverse spacing of the heat exchange tube bundle; h 2-longitudinal spacing of the heat exchange tube bundle.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
As shown in fig. 1-2, an embodiment of the present invention provides a tubular heat exchanger, which includes a heat exchange tube bundle longitudinally disposed, and a heat exchanger shell (not shown in the drawings), where a surface of any heat exchange tube 1 in the heat exchange tube bundle is uniformly provided with two longitudinal fins 2 axially disposed along the heat exchange tube 1, and the two longitudinal fins 2 are both mounted at a rear portion of each heat exchange tube 1 by welding or the like (with respect to a flue gas incoming flow direction, the flue gas incoming flow direction is forward).
In the preferred embodiment, the transverse spacing h1 of the tube bundle and the longitudinal spacing h2 of the tube bundle are the same and are both twice the length of the outer diameter d of the heat exchange tube 1. Of course, the values of h1 and h2 can be changed according to actual needs. The two longitudinal fins 2 are arranged at the rear part of the heat exchange tube 1 in parallel, at the moment, the included angle between the two longitudinal fins 2 is 0 degree, and the included angle theta between the intersection line of the outer surface of each longitudinal fin 2 and the heat exchange tube 1 is 30 degrees; the included angle between the two longitudinal fins 2 can also be 8 degrees, 10 degrees and the like according to actual needs, and at the moment, the angle theta can be easily calculated, and the range of the angle theta is 15 degrees to 45 degrees.
After the longitudinal fins 2 are added to the rear part of the heat exchange tube 1, the fins can prevent a wake flow area from appearing, so that the deposition of particles in flue gas on the surface of the heat exchanger is effectively reduced, the heat exchanger can run for a long time under the condition of flue gas, the cleaning times of the heat exchanger are reduced, and the service life of the heat exchanger is prolonged. Meanwhile, the longitudinal fins 2 are added, so that the heat exchange area of the heat exchanger is increased, and the heat exchange efficiency is improved. The invention is suitable for the environment containing smoke dust, and has particularly remarkable effect of reducing the deposition of particles with smaller diameter (less than 1 mu m) in smoke.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a tubular heat exchanger for waste heat recovery, includes the heat exchange tube bank of vertical setting, its characterized in that: the heat exchange tube comprises a heat exchange tube (1) and is characterized in that the surface of any heat exchange tube (1) is provided with two longitudinal fins (2), relative to the incoming flow direction of flue gas, the two longitudinal fins (2) are arranged at the rear part of the heat exchange tube (1) and are respectively arranged on two sides of the axis of the heat exchange tube (1), wherein hot fluid containing particles flows through the heat exchange tube (1) from the outside, and cold fluid containing no particles flows through the heat exchange tube from the inside.
2. The tube heat exchanger for waste heat recovery according to claim 1, wherein: the included angle between the two longitudinal fins (2) ranges from 0 degree to 10 degrees.
3. The tube heat exchanger for waste heat recovery according to claim 1, wherein: the length of the longitudinal fin (2) is equal to that of the heat exchange tube (1).
4. The tube heat exchanger for waste heat recovery according to claim 1, wherein: the intersection line of the outer surface of the longitudinal fin (2) and the heat exchange tube (1) forms an included angle theta of 15-45 degrees relative to the heat exchange tube (1).
5. The tube heat exchanger for waste heat recovery according to claim 1, wherein: the transverse space of the heat exchange tube bundle is the same as the longitudinal space of the heat exchange tube bundle, and the transverse space and the longitudinal space of the heat exchange tube bundle are both twice of the external diameter of the heat exchange tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010344560.4A CN111551062A (en) | 2020-04-27 | 2020-04-27 | Tubular heat exchanger for waste heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010344560.4A CN111551062A (en) | 2020-04-27 | 2020-04-27 | Tubular heat exchanger for waste heat recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111551062A true CN111551062A (en) | 2020-08-18 |
Family
ID=72005775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010344560.4A Pending CN111551062A (en) | 2020-04-27 | 2020-04-27 | Tubular heat exchanger for waste heat recovery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111551062A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033183A (en) * | 2020-08-31 | 2020-12-04 | 安徽诚铭热能技术有限公司 | Tubular radiation heat exchanger |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB642737A (en) * | 1946-04-10 | 1950-09-13 | Cie Des Surchauffeurs | Improvements in or relating to tubular elements for heat exchange apparatus |
| CN2056744U (en) * | 1989-11-14 | 1990-05-02 | 刘志敏 | Heat pipe heat exchanger for boiler |
| CN2108885U (en) * | 1990-08-15 | 1992-07-01 | 北京科技大学 | High temp. heat-exchanger with radiating fin |
| CN2694213Y (en) * | 2004-05-09 | 2005-04-20 | 程好军 | Pipe cluster with wing |
| US20050081549A1 (en) * | 2003-10-16 | 2005-04-21 | Wu Ho H. | Evaporation type condensation radiator piping for refrigeration and air-conditioning facilities |
-
2020
- 2020-04-27 CN CN202010344560.4A patent/CN111551062A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB642737A (en) * | 1946-04-10 | 1950-09-13 | Cie Des Surchauffeurs | Improvements in or relating to tubular elements for heat exchange apparatus |
| CN2056744U (en) * | 1989-11-14 | 1990-05-02 | 刘志敏 | Heat pipe heat exchanger for boiler |
| CN2108885U (en) * | 1990-08-15 | 1992-07-01 | 北京科技大学 | High temp. heat-exchanger with radiating fin |
| US20050081549A1 (en) * | 2003-10-16 | 2005-04-21 | Wu Ho H. | Evaporation type condensation radiator piping for refrigeration and air-conditioning facilities |
| CN2694213Y (en) * | 2004-05-09 | 2005-04-20 | 程好军 | Pipe cluster with wing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033183A (en) * | 2020-08-31 | 2020-12-04 | 安徽诚铭热能技术有限公司 | Tubular radiation heat exchanger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101504261B (en) | Longitudinal stream integral finned tube | |
| CN201145504Y (en) | Heat exchange tube with special cross-section | |
| WO2019019205A1 (en) | Gas-gas high-temperature heat exchanger | |
| CN201145505Y (en) | High-efficiency self-destabilization heat exchange tube | |
| CN111551062A (en) | Tubular heat exchanger for waste heat recovery | |
| CN101893402A (en) | Heat accumulating type flue gas waste heat recovery device | |
| CN2149598Y (en) | Drop-cross-section tubular heat exchanger | |
| CN211084569U (en) | Cooling device of biomass boiler | |
| CN202274783U (en) | Shell-and-tube exhaust-heat boiler with spiral grooved tube | |
| CN204665982U (en) | A kind of water-cooled shell oil cooler | |
| CN201218681Y (en) | Fluctuation heat pipe module and thermal energy reclaiming equipment equipped with the same | |
| CN110173712A (en) | Air-water heat exchanger with perpendicular fins | |
| CN101865623B (en) | Helical flat pipe for waste heat boiler | |
| CN204921190U (en) | Engine exhaust waste heat recovery ware core of pipe racks formula structure | |
| CN107192290A (en) | The many oval extended surface tube heat exchange elements of polygon fin | |
| CN201302410Y (en) | Longitudinal finned oblate tube heat exchanger for high-temperature, corrosive dusty gas | |
| CN207487453U (en) | A kind of heat-exchange system for slowing down dust stratification enhanced heat exchange based on corrugated heat-exchange fin | |
| CN105953624A (en) | Energy storage heat exchange pipeline structure | |
| CN201706927U (en) | Shell-and-tube exhaust-heat boiler with spiral flat tube | |
| CN206235200U (en) | The outer guide baffle rod U pipes pure contra-flow heat exchanger of U shells | |
| CN105180703A (en) | Internal and external finned tubes with efficient heat exchanging function, efficient heat exchanger and manufacturing method for efficient heat exchanger | |
| CN203432429U (en) | Heat exchange device for manufacturing regeneration aluminum alloy | |
| CN205383585U (en) | Medium temperature section of boiler is with compound extended surface tube | |
| CN202836278U (en) | Heat-transferring device | |
| CN105318750A (en) | Honeycomb-shaped heat transfer device and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200818 |