CN112361373A - Double-ribbed-tube full-counter-flow type flue gas condensation-air preheating system - Google Patents
Double-ribbed-tube full-counter-flow type flue gas condensation-air preheating system Download PDFInfo
- Publication number
- CN112361373A CN112361373A CN202011235085.3A CN202011235085A CN112361373A CN 112361373 A CN112361373 A CN 112361373A CN 202011235085 A CN202011235085 A CN 202011235085A CN 112361373 A CN112361373 A CN 112361373A
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- Prior art keywords
- heat exchange
- flue
- air
- full
- pipe
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000003546 flue gas Substances 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000008901 benefit Effects 0.000 abstract description 6
- 239000007789 gas Substances 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 235000019504 cigarettes Nutrition 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
-
- 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
- F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
- F28F1/424—Means comprising outside portions integral with inside portions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention provides a double-ribbed-tube full-counter-flow type flue gas condensation-air preheating system, and belongs to the technical field of flue gas treatment of gas-fired boilers. This system includes that the flue inserts the pipe, the heat exchange tube sheet, the air outlet chamber, the fin runs through formula heat exchange tube entirely, the air inlet chamber, reverse heat transfer chamber, the comdenstion water discharge pipe, the heat exchange tube sheet is connected at fin runs through formula heat exchange tube both ends entirely, the heat exchange tube sheet inserts the union coupling through the flue on the boiler flue, the fin runs through the outside parcel shell of formula heat exchange tube entirely and forms reverse heat transfer chamber, between reverse heat transfer chamber and heat exchange tube sheet, form air inlet chamber and air outlet chamber, the flue inserts the pipe below and connects the comdenstion water discharge pipe. This system unit is small and exquisite, installation and transformation are simple and easy, heat exchange efficiency is high, safe and reliable, economic input-output ratio are high, and flue gas defogging is peeled off whitely and waste heat recovery goes on in step, eliminates "the white cigarette that curls upwards" when gas boiler moves, improves economic benefits and environmental protection benefit greatly.
Description
Technical Field
The invention relates to the technical field of gas boiler flue gas treatment, in particular to a double-ribbed-tube full-counterflow flue gas condensation-air preheating system.
Background
With the enhancement of energy and environmental awareness of people, people pay attention to how to efficiently utilize energy, reduce energy consumption, reduce water mist emission and utilize water resources. Gas boiler is common equipment such as heating and mill, and the boiler also has the flue gas that carries a large amount of heats and water and discharges in the air when exerting its effect itself, has not only caused ambient temperature's rising, has promoted the formation of haze, has also wasted a large amount of energy.
At present, a finned condenser is mostly adopted for passive recovery of boiler flue gas, finned tubes are adopted in the condenser as a main heat exchange device, and the condenser is remarkably characterized in that flowing water is in the finned tubes, flue gas is out of the finned tubes, the heat collection area is large, the heat exchange area is small, the wall thickness is large, the heat exchange temperature difference is large, and deep recovery and demisting and whitening of flue gas waste heat cannot be achieved.
Disclosure of Invention
The invention aims to provide a double-ribbed-tube full-counterflow flue gas condensation-air preheating system. The invention mainly comprises the following steps:
the structure of the heat exchange tube with double fins is designed and used;
the design and the use of the heat exchange tube made of the high heat conduction and corrosion resistant alloy material;
the design and the use of a full countercurrent heat exchange structure;
the system comprises a flue access pipe, a heat exchange pipe plate, an air outlet cavity, a fin full-penetration type heat exchange pipe, an air inlet cavity, a reverse heat exchange cavity and a condensate water discharge pipe, wherein the number of the flue access pipe and the heat exchange pipe plate is two, namely a flue access pipe I, a flue access pipe II, a heat exchange pipe plate I and a heat exchange pipe plate II, two ends of the fin full-penetration type heat exchange pipe are respectively connected with the heat exchange pipe plate I and the heat exchange pipe plate II, the heat exchange pipe plate I is connected to a boiler flue through the flue access pipe I, the heat exchange pipe plate II is connected to the boiler flue through the flue access pipe II, the fin full-penetration type heat exchange, an air inlet cavity is formed between the reverse heat exchange cavity and the heat exchange tube plate II, an air outlet cavity is formed between the reverse heat exchange cavity and the heat exchange tube plate I, and a condensed water discharge pipe is connected below the flue access tube I and the flue access tube II.
The air inlet cavity can be opened in one direction to form an air inlet after being wrapped, and the air inlet can be additionally provided with an inlet fan; the air outlet cavity can be opened in one direction to form an air outlet after being wrapped, and the air outlet can be additionally provided with a fan to supply air to the boiler through pipeline orientation.
The low-temperature air enters from the air inlet cavity and is heated into high-temperature air when passing through the reverse heat exchange cavity, and the high-temperature air is discharged from the air outlet cavity.
The fin full-through type heat exchange tubes are fin tubes with the wall thickness not greater than 6mm and longitudinal fins on the inner side and the outer side, and the number of the fin full-through type heat exchange tubes is not less than 1.
When the system is horizontally installed, the first flue access pipe and the second flue access pipe are connected with a condensate water discharge pipe; when the system is vertically installed, the condensed water discharge pipe is installed at the lowest end of the flue pipe.
The boiler flue and the first flue access pipe and the second flue access pipe are connected with each other to form a flue connecting device; the first flue access pipe, the second flue access pipe and the condensed water discharge pipe are connected with each other to form a condensed water collecting device.
The finned full-through heat exchange tubes in the air inlet cavity and the air outlet cavity are provided with fins (especially outer fins) removed to form transverse air circulation channels.
The technical scheme of the invention has the following beneficial effects:
among the above-mentioned scheme, this system is as flue gas waste heat recovery system, and the advantage lies in that the unit is small and exquisite, the installation and reform transform simple and easy, heat exchange efficiency is high, safe and reliable, economic input-output ratio is high, and flue gas is peeled off white and waste heat recovery is gone on in step, eliminates "the white cigarette that curls up" that curls up when gas boiler moves, makes gas boiler move under "smokeless (hot vapour)" state, has improved economic benefits and environmental protection benefit greatly.
Drawings
FIG. 1 is a schematic structural view of a double-finned-tube full-counterflow flue gas condensing-air preheating system according to the present invention;
fig. 2 is a schematic structural view of a finned heat exchange tube of a double-finned tube full-counterflow flue gas condensing-air preheating system of the present invention, wherein (a) is in the form one, (b) is in the form two, (c) is in the form three, (d) is in the form four, (e) is in the form five, (f) is in the form six, (g) is in the form seven, and (h) is in the form eight.
Wherein: 1-a flue access pipe I; 2, a first heat exchange tube plate; 3-an air outlet chamber; 4-fin full-penetration heat exchange tube; 5-air inlet chamber; 6-heat exchange tube plate II; 7-a reverse heat exchange cavity; 8-a condensed water discharge pipe; 9-flue access pipe two.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a double-ribbed-tube full-counterflow flue gas condensation-air preheating system.
As shown in figure 1, the system comprises a flue access pipe, a heat exchange pipe plate, an air outlet cavity 3, a fin full-penetration type heat exchange pipe 4, an air inlet cavity 5, a reverse heat exchange cavity 7 and a condensed water discharge pipe 8, wherein the flue access pipe and the heat exchange pipe plate are respectively two and respectively comprise a flue access pipe 1, a flue access pipe 9, a heat exchange pipe plate 2 and a heat exchange pipe plate 6, two ends of the fin full-penetration type heat exchange pipe 4 are respectively connected with the heat exchange pipe plate 2 and the heat exchange pipe plate 6, the heat exchange pipe plate 2 is connected to a boiler flue through the flue access pipe 1, the heat exchange pipe plate 6 is connected to the boiler flue through the flue access pipe 9, the fin full-penetration type heat exchange pipe 4 is externally wrapped by a shell to form the reverse heat exchange cavity 7, the air inlet cavity 5 is formed between the reverse heat exchange cavity 7 and the heat exchange pipe plate 6, the air outlet cavity 3 is formed between, and condensed water discharge pipes are connected below the first flue access pipe 1 and the second flue access pipe 9.
The air inlet cavity 5 can be opened in one direction to form an air inlet after being wrapped, and an inlet fan is additionally arranged; the air outlet cavity 3 can be opened in one direction to form an air outlet after being wrapped, and air is supplied to the boiler through pipeline orientation.
A length of finned fully through heat exchange tubes 4 in the air outlet chamber 3 and air inlet chamber 5 requires the removal of the outer fins (or together with the inner fins) to obtain a cross flow path for the air.
As shown in FIG. 2, the finned full-through heat exchange tubes 4 are finned tubes with longitudinal fins inside and outside and with the wall thickness not greater than 6mm, and the number of the finned full-through heat exchange tubes 4 is not less than 1. The form of the fin full-penetration type heat exchange tube 4 is not limited to three in the figure, and the number and the position of the inner fin and the outer fin can be selected according to the situation; the direction of the inner fin and the outer fin is longitudinal (namely, the direction is the same as that of the heat exchange tube).
When the system is horizontally installed, the first flue access pipe 1 and the second flue access pipe 9 are connected with a condensed water discharge pipe 8; when the system is vertically installed, the condensate water discharge pipe 8 is installed at the lowest end of the flue pipe.
The boiler flue, the flue access pipe I1 and the flue access pipe II 9 are mutually connected to form a flue connecting device; the first flue access pipe 1, the second flue access pipe 9 and the condensed water discharge pipe 8 are connected with each other to form a condensed water collecting device.
In the system, the fins of the full-through heat exchange tube 4 are internally and externally circulated with flue gas and air respectively, the flue gas and the air can be circulated at any side, and the two gases flow in opposite directions.
The air inlet cavity 5 and the air outlet cavity 3 can be closed boxes with outlets or can be in an open state and can be adjusted according to requirements.
In practical application, this system can the direct access in the boiler flue, and the flue gas passes through in the fin runs through formula heat exchange tube entirely, and low temperature air gets into (or is squeezed into by the fan) from the air inlet chamber, heats to become high temperature air and discharges from the air outlet chamber during through reverse heat transfer chamber for indoor heating or supply boiler.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The utility model provides a full counter-current formula flue gas condensation-air preheating system of double-ribbed pipe which characterized in that: the heat exchange tube comprises a flue access tube, a heat exchange tube plate, an air outlet cavity (3), a fin full-penetration type heat exchange tube (4), an air inlet cavity (5), a reverse heat exchange cavity (7) and a condensed water discharge tube (8), wherein the number of the flue access tube and the heat exchange tube plate is two, the flue access tube I (1), the flue access tube II (9), the heat exchange tube plate I (2) and the heat exchange tube plate II (6) are respectively connected to two ends of the fin full-penetration type heat exchange tube (4), the heat exchange tube plate I (2) is connected to a boiler flue through the flue access tube I (1), the heat exchange tube plate II (6) is connected to the boiler flue through the flue access tube II (9), the fin full-penetration type heat exchange tube (4) is externally wrapped by a shell to form the reverse heat exchange cavity (7), and the air inlet cavity (5) is formed between the reverse heat exchange cavity (7) and the heat exchange tube plate, an air outlet cavity (3) is formed between the reverse heat exchange cavity (7) and the first heat exchange tube plate (2), and condensed water discharge pipes are connected below the first flue access pipe (1) and the second flue access pipe (9).
2. The double-finned tube full-counterflow flue gas condensing-air preheating system of claim 1, wherein: the air inlet cavity (5) can be opened in a one-way mode to form an air inlet after being wrapped; the air outlet cavity (3) can be opened in one direction to form an air outlet after being wrapped, and air is supplied to the boiler through pipeline orientation.
3. The double-finned tube full-counterflow flue gas condensing-air preheating system of claim 2, wherein: the air inlet is additionally provided with an inlet fan, and the air outlet is additionally provided with an outlet fan.
4. The double-finned tube full-counterflow flue gas condensing-air preheating system of claim 1, wherein: the low-temperature air enters from the air inlet cavity (5), is heated into high-temperature air when passing through the reverse heat exchange cavity (7), and is discharged from the air outlet cavity (3).
5. The double-finned tube full-counterflow flue gas condensing-air preheating system of claim 1, wherein: the fin full-through type heat exchange tubes (4) are fin tubes with the wall thickness not greater than 6mm and longitudinal fins inside and outside, and the number of the fin full-through type heat exchange tubes (4) is not less than 1.
6. The double-finned tube full-counterflow flue gas condensing-air preheating system of claim 1, wherein: when the system is horizontally installed, a condensed water discharge pipe (8) is connected to the first flue access pipe (1) and the second flue access pipe (9); when the system is vertically installed, the condensed water discharge pipe (8) is installed at the lowest end of the flue pipe.
7. The double-finned tube full-counterflow flue gas condensing-air preheating system of claim 1, wherein: the boiler flue, the first flue access pipe (1) and the second flue access pipe (9) are connected with each other to form a flue connecting device; the flue access pipe I (1), the flue access pipe II (9) and the condensed water discharge pipe (8) are connected with each other to form a condensed water collecting device.
8. The double-finned tube full-counterflow flue gas condensing-air preheating system of claim 1, wherein: fins of the fin full-penetration type heat exchange tube (4) in the sections of the air inlet cavity (5) and the air outlet cavity (3) are removed to form a transverse air circulation channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011235085.3A CN112361373A (en) | 2020-11-08 | 2020-11-08 | Double-ribbed-tube full-counter-flow type flue gas condensation-air preheating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011235085.3A CN112361373A (en) | 2020-11-08 | 2020-11-08 | Double-ribbed-tube full-counter-flow type flue gas condensation-air preheating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112361373A true CN112361373A (en) | 2021-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011235085.3A Pending CN112361373A (en) | 2020-11-08 | 2020-11-08 | Double-ribbed-tube full-counter-flow type flue gas condensation-air preheating system |
Country Status (1)
| Country | Link |
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| CN (1) | CN112361373A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218231A (en) * | 2021-06-21 | 2021-08-06 | 山东爱客多热能科技有限公司 | Novel steel-aluminum composite casting integrated heat exchange tube |
| CN114136126A (en) * | 2021-11-29 | 2022-03-04 | 无锡齐为金属科技有限公司 | Finned tube type heat exchanger |
| CN114543067A (en) * | 2022-02-24 | 2022-05-27 | 东莞顺裕纸业有限公司 | Coal-to-gas station with improved air flow passage and improved heat energy utilization rate |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218231A (en) * | 2021-06-21 | 2021-08-06 | 山东爱客多热能科技有限公司 | Novel steel-aluminum composite casting integrated heat exchange tube |
| CN114136126A (en) * | 2021-11-29 | 2022-03-04 | 无锡齐为金属科技有限公司 | Finned tube type heat exchanger |
| CN114543067A (en) * | 2022-02-24 | 2022-05-27 | 东莞顺裕纸业有限公司 | Coal-to-gas station with improved air flow passage and improved heat energy utilization rate |
| CN114543067B (en) * | 2022-02-24 | 2024-03-22 | 东莞顺裕纸业有限公司 | Coal gas station with improved air flow passage and improved heat energy utilization rate |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210212 |
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