CN113624044A - A Gravity Heat Pipe with Extended Heating Surface - Google Patents
A Gravity Heat Pipe with Extended Heating Surface Download PDFInfo
- Publication number
- CN113624044A CN113624044A CN202111094140.6A CN202111094140A CN113624044A CN 113624044 A CN113624044 A CN 113624044A CN 202111094140 A CN202111094140 A CN 202111094140A CN 113624044 A CN113624044 A CN 113624044A
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- China
- Prior art keywords
- heat
- section
- heat pipe
- flue
- surface according
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Links
- 230000005484 gravity Effects 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 title claims abstract description 13
- 238000010521 absorption reaction Methods 0.000 claims abstract description 27
- 238000009413 insulation Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000012774 insulation material Substances 0.000 claims abstract description 5
- 239000000428 dust Substances 0.000 description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- 239000003245 coal Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Images
Classifications
-
- 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
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/025—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes having non-capillary condensate return means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
本发明公开了一种带扩展受热面的重力型热管，包括烟道及换热器本体，所述换热器本体包括水室及若干热管本体，其中，热管本体自下到上依次分为吸热段、绝热段及放热段，其中，吸热段位于烟道内，放热段位于水室内，吸热段与放热段之间通过绝热段相连接，绝热段位于烟道与水室之间，吸热段及放热段的外表面均设置有若干鳞片，绝热段的外表面上设置有保温材料层，该热管能够增加热换面积，换热能力优异。
The invention discloses a gravity heat pipe with an expanded heating surface, comprising a flue and a heat exchanger body. The heat exchanger body includes a water chamber and a plurality of heat pipe bodies, wherein the heat pipe body is divided into suction pipes from bottom to top. The heat absorption section is located in the flue, the heat release section is located in the water chamber, the heat absorption section and the heat release section are connected by the heat insulation section, and the heat insulation section is located between the flue and the water chamber. The outer surfaces of the heat absorbing section and the exothermic section are provided with a number of scales, and the outer surface of the adiabatic section is provided with a thermal insulation material layer. The heat pipe can increase the heat exchange area and has excellent heat exchange capacity.
Description
Technical Field
The invention belongs to the technical field of heat exchange, and relates to a gravity type heat pipe with an extended heating surface.
Background
In recent years, the national requirements on energy conservation and emission reduction of thermal power plants are increasingly strict, the ultra-low emission of the coal-fired power plants is required to be gradually realized in the action plan for energy conservation and emission reduction and upgrading of coal power (2014-2020) (issue and improvement of energy [2014] 2093), and the average power supply coal consumption after the modification of the existing thermal power generating units is lower than 310g/kWh in 2020, wherein the average power supply coal consumption after the modification of the existing thermal power generating units (except for air cooling units) of 60 ten thousand kilowatts or more is lower than 300 g/kWh. With the proposal of carbon neutralization strategy in 2030 year of carbon peak 2060, the energy-saving and emission-reducing tasks of thermal power plants are more difficult.
The flue gas waste heat loss is the largest loss of a power station boiler, a plurality of flue gas waste heat utilization technologies are developed at present, the flue gas temperature can be reduced to 100-90 ℃, the power generation coal consumption of a unit is saved by 1.5-3.0g/kWh, and the contribution is made to the energy conservation and emission reduction of a thermal power plant. The low-temperature economizer is a main technology for utilizing the waste heat of the flue gas at present and is widely applied in China. However, due to the reasons of high ash content and sulfur content of coal, unstable coal quality, low load, high ammonia escape in flue gas, uneven flow field of flue gas and the like in China, after the low-temperature and low-temperature economizer operates for more than five years, the problems of ash blockage, abrasion, leakage and the like begin to be obvious, the leakage is finally caused by the ash blockage and the abrasion, the ash blockage and the abrasion are aggravated by the leakage, and the vicious circle is caused. After the low-temperature economizer leaks, water vapor enters the dust remover to cause the dust removing device of the dust remover to be blocked; the dust blocking and hardening of the heating surface are caused after leakage, and the cleaning difficulty and the maintenance workload are greatly increased; meanwhile, the smoke temperature at the outlet of the low-temperature economizer is increased, the efficiency of the electrostatic dust collector is reduced, and the risk of standard exceeding of dust at the main discharge port is increased.
The heat pipe heat exchanger can solve the leakage problem, the liquid capacity in each heat pipe is very limited, and the heat pipes are mutually independent, so that the leakage accident can not occur even if the heat exchange pipes are damaged. However, at present, the gravity heat pipe can only be vertically arranged, is suitable for a light pipe, has insufficient heat exchange capacity, cannot meet the requirement of a low-temperature economizer of a large-scale unit, and does not find an expansion heating surface suitable for the gravity heat pipe.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a gravity type heat pipe with an extended heating surface, which can increase the heat exchange area and has excellent heat exchange capacity.
In order to achieve the purpose, the gravity type heat pipe with the expanded heating surface comprises a flue and a heat exchanger body, wherein the heat exchanger body comprises a water chamber and a plurality of heat pipe bodies, the heat pipe bodies are sequentially divided into a heat absorption section, a heat insulation section and a heat release section from bottom to top, the heat absorption section is located in the flue, the heat release section is located in the water chamber, the heat absorption section is connected with the heat release section through the heat insulation section, the heat insulation section is located between the flue and the water chamber, the outer surfaces of the heat absorption section and the heat release section are provided with a plurality of scales, and the outer surface of the heat insulation section is provided with a heat insulation material layer.
The heat pipe bodies are vertically arranged.
The distance between the lower end of the heat absorption section and the bottom of the flue is 200 mm.
The top of the flue is welded with the outer wall of the lower end of the heat insulation section, and the bottom of the water chamber is welded with the outer wall of the upper end of the heat insulation section.
The scales are arranged in sequence or staggered.
The thickness of the scale is 0.3-0.6mm, the included angle between the scale and the axis of the heat pipe body is 30-60 degrees, and all scales are distributed downwards in an inclined mode.
The width of the scale is 2-4mm, and the length is 4-8 mm.
The distance between adjacent scales is 2-6 mm.
The scales are rectangular, triangular or semicircular.
The thickness of the scale is gradually reduced from the root to the end of the scale.
The invention has the following beneficial effects:
when the gravity type heat pipe with the expanded heated surface is in specific operation, the heat absorption section is positioned in the flue, the heat release section is positioned in the water chamber, the heat absorption section is connected with the heat release section through the heat insulation section, the heat insulation section is positioned between the flue and the water chamber, when the gravity type heat pipe works, working media in the heat absorption section absorb heat of flue gas in the flue, then evaporate and move upwards, enter the heat release section to release heat and then condense, and fall into the heat absorption section, the outer surfaces of the heat absorption section and the heat release section are respectively provided with a plurality of scales to increase the heat exchange area and improve the heat exchange efficiency, the outer surface of the heat insulation section is provided with the heat insulation material layer to reduce heat loss and improve the heat exchange efficiency, and the gravity type heat pipe with the expanded heated surface can improve the heat exchange capacity of a heat pipe exchanger, reduce the volume of the heat pipe exchanger, and has higher safety and economical efficiency of equipment.
Drawings
FIG. 1 is a front view of a heat exchanger body according to the present invention;
FIG. 2 is a view A-A of the heat exchanger body of the present invention;
FIG. 3 is a schematic view of a heat exchange tube 3 according to the present invention;
wherein, 1 is a flue, 2 is a water chamber, 3 is a heat exchange tube, 3-1 is a heat absorption section, 3-2 is a heat insulation section, 3-3 is a heat release section, and 3-4 is a scale.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, 2 and 3, the gravity type heat pipe with the extended heating surface of the invention comprises a flue 1 and a heat exchanger body, wherein the heat exchanger body comprises a water chamber 2 and a plurality of heat pipe bodies 3, the heat pipe bodies 3 are divided into a heat absorption section 3-1, a heat insulation section 3-2 and a heat release section 3-3, the heat absorption section 3-1 is located in the flue 1, the heat release section 3-3 is located in the water chamber 2, the heat absorption section 3-1 and the heat release section 3-3 are connected through the heat insulation section 3-2, the heat insulation section 3-2 is located between the flue 1 and the water chamber 2, the heat pipe bodies 3 are vertically arranged, the distance between the lower end of the heat absorption section 3-1 and the bottom of the flue 1 is 200mm, and the heat pipe bodies are used as an ash discharge channel for placing accumulated ash.
The top of the flue 1 is welded with the outer wall at the lower end of the heat insulation section 3-2, and the bottom of the water chamber 2 is welded with the outer wall at the upper end of the heat insulation section 3-2.
And a heat insulation material layer is arranged on the outer surface of the heat insulation section 3-2.
The outer surfaces of the heat absorption section 3-1 and the heat release section 3-3 are provided with a plurality of scales 3-4.
The gaps of the scales 3-4 on the heat absorption section 3-1 are the same as or different from the gaps of the scales 3-4 on the heat release section 3-3.
The scales 3-4 are arranged in a row or in a staggered way.
The thickness of the scales 3-4 is 0.3-0.6mm, the included angle between the scales 3-4 and the axis of the heat pipe body 3 is 30-60 degrees, and the scales 3-4 are distributed downwards in an inclined mode. The width of the scales 3-4 is 2-4mm, the length is 4-8mm, and the distance between the adjacent scales 3-4 is 2-6 mm.
The scales 3-4 are rectangular, triangular or semicircular, and the thickness of the scales 3-4 is gradually reduced from the root parts to the end parts of the scales 3-4.
The method for determining the number of the scales 3-4 comprises the following steps: and selecting the number of the scales 3-4 according to thermal calculation, calculating the carrying limit of the heat pipe body, and reducing the number of the scales 3-4 or shortening the length of the heat pipe body 3 and increasing the number of the heat pipe body 3 when the carrying limit of the heat pipe body 3 is exceeded.
The specific working process of the invention is as follows:
the flue gas circulates in the flue 1, the working medium in the heat pipe body 3 absorbs heat in the heat absorption section 3-1 to become gaseous state, the gaseous working medium is heated to the heat release section 3-3 through the heat insulation section 3-2 along the inner wall of the heat pipe body 3, after heat exchange with cold water in the heat release section 3-3, the gaseous working medium is condensed to become liquid state, and then the gaseous working medium flows downwards to the heat absorption section 3-1 along the inner wall of the heat pipe body 3 to form heat absorption and release circulation. The heat exchange area of the heat absorption section 3-1 is increased by 2-3 times through the scales 3-4, and the heat exchange capacity is improved by 2-4 times. The width, the interval and the length of the scales 3-4 are set to be structures which are not easy to accumulate dust, and the scales 3-4 can slightly shake in smoke gas, so that the smoke dust self-cleaning device has a dust self-cleaning function.
Finally, the invention can greatly improve the heat exchange efficiency of the heat pipe body 3, reduce the volume of the heat pipe heat exchanger and improve the safety and the economy of equipment.
Claims (10)
1. The gravity type heat pipe with the expanded heating surface is characterized by comprising a flue (1) and a heat exchanger body, wherein the heat exchanger body comprises a water chamber (2) and a plurality of heat pipe bodies (3), the heat pipe bodies (3) are sequentially divided into a heat absorption section (3-1), a heat insulation section (3-2) and a heat release section (3-3) from bottom to top, the heat absorption section (3-1) is located in the flue (1), the heat release section (3-3) is located in the water chamber (2), the heat absorption section (3-1) is connected with the heat release section (3-3) through the heat insulation section (3-2), the heat insulation section (3-2) is located between the flue (1) and the water chamber (2), and a plurality of scales (3-4) are arranged on the outer surfaces of the heat absorption section (3-1) and the heat release section (3-3), the outer surface of the heat insulation section (3-2) is provided with a heat insulation material layer.
2. A gravity heat pipe with an extended heated surface according to claim 1, wherein each heat pipe body (3) is arranged vertically.
3. A gravity heat pipe with an extended heating surface according to claim 1, wherein the distance between the lower end of the heat absorbing section (3-1) and the bottom of the flue (1) is 200 mm.
4. The gravity type heat pipe with an extended heating surface according to claim 1, wherein the top of the flue (1) is welded to the outer wall of the lower end of the heat insulating section (3-2), and the bottom of the water chamber (2) is welded to the outer wall of the upper end of the heat insulating section (3-2).
5. A gravity type heat pipe with an extended heated surface according to claim 1 wherein the scales (3-4) are arranged in series or in a staggered arrangement.
6. A gravity type heat pipe with an extended heating surface according to claim 1, wherein the thickness of the scale (3-4) is 0.3-0.6mm, the included angle between the scale (3-4) and the axis of the heat pipe body (3) is 30-60 °, and each scale (3-4) is distributed obliquely downwards.
7. A gravity type heat pipe with an extended heated surface according to claim 1 wherein the scale (3-4) has a width of 2-4mm and a length of 4-8 mm.
8. A gravity type heat pipe with an extended heated surface according to claim 1 wherein the pitch of the adjacent scales (3-4) is 2-6 mm.
9. A gravity type heat pipe with an extended heated surface according to claim 1 wherein the scale (3-4) is rectangular, triangular or semicircular.
10. A gravity type heat pipe with an extended heated surface according to claim 1 wherein the thickness of the scale (3-4) is gradually reduced from the root to the end of the scale (3-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111094140.6A CN113624044A (en) | 2021-09-17 | 2021-09-17 | A Gravity Heat Pipe with Extended Heating Surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111094140.6A CN113624044A (en) | 2021-09-17 | 2021-09-17 | A Gravity Heat Pipe with Extended Heating Surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113624044A true CN113624044A (en) | 2021-11-09 |
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ID=78390372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111094140.6A Pending CN113624044A (en) | 2021-09-17 | 2021-09-17 | A Gravity Heat Pipe with Extended Heating Surface |
Country Status (1)
| Country | Link |
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| CN (1) | CN113624044A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2052523U (en) * | 1989-03-13 | 1990-02-07 | 何良坤 | Anticorrosion heat-exchange apparatus of heat-pipe |
| CN101509705A (en) * | 2009-04-01 | 2009-08-19 | 南京师范大学 | Condensing gas water heater based on thermosiphon secondary heat exchange |
| US20140131014A1 (en) * | 2012-11-14 | 2014-05-15 | Cooler Master Development Corporation | Heat dissipating device |
| CN104006688A (en) * | 2014-06-06 | 2014-08-27 | 骏马石油装备制造有限公司 | Heat pipe type energy saver and heat exchange method |
| CN106403288A (en) * | 2015-04-20 | 2017-02-15 | 林庆明 | Novel condensation hot pipe coiler |
| CN108361727A (en) * | 2018-04-10 | 2018-08-03 | 西安西热锅炉环保工程有限公司 | A kind of tubular type condensation heat exchange system of achievable dropwise condensation |
| CN108469192A (en) * | 2018-04-04 | 2018-08-31 | 北京巴布科克·威尔科克斯有限公司 | A kind of heat exchanger and heat-exchange system to exchange heat for drum and high-temperature gas |
| CN215638971U (en) * | 2021-09-17 | 2022-01-25 | 西安热工研究院有限公司 | Gravity type heat pipe with extended heating surface |
-
2021
- 2021-09-17 CN CN202111094140.6A patent/CN113624044A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2052523U (en) * | 1989-03-13 | 1990-02-07 | 何良坤 | Anticorrosion heat-exchange apparatus of heat-pipe |
| CN101509705A (en) * | 2009-04-01 | 2009-08-19 | 南京师范大学 | Condensing gas water heater based on thermosiphon secondary heat exchange |
| US20140131014A1 (en) * | 2012-11-14 | 2014-05-15 | Cooler Master Development Corporation | Heat dissipating device |
| CN104006688A (en) * | 2014-06-06 | 2014-08-27 | 骏马石油装备制造有限公司 | Heat pipe type energy saver and heat exchange method |
| CN106403288A (en) * | 2015-04-20 | 2017-02-15 | 林庆明 | Novel condensation hot pipe coiler |
| CN108469192A (en) * | 2018-04-04 | 2018-08-31 | 北京巴布科克·威尔科克斯有限公司 | A kind of heat exchanger and heat-exchange system to exchange heat for drum and high-temperature gas |
| CN108361727A (en) * | 2018-04-10 | 2018-08-03 | 西安西热锅炉环保工程有限公司 | A kind of tubular type condensation heat exchange system of achievable dropwise condensation |
| CN215638971U (en) * | 2021-09-17 | 2022-01-25 | 西安热工研究院有限公司 | Gravity type heat pipe with extended heating surface |
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