CN112665070A - Mine return air waste heat recovery heat exchanger based on variable heat conduction pipe - Google Patents
Mine return air waste heat recovery heat exchanger based on variable heat conduction pipe Download PDFInfo
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- CN112665070A CN112665070A CN202110049361.5A CN202110049361A CN112665070A CN 112665070 A CN112665070 A CN 112665070A CN 202110049361 A CN202110049361 A CN 202110049361A CN 112665070 A CN112665070 A CN 112665070A
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- 239000002918 waste heat Substances 0.000 title claims abstract description 30
- 238000011084 recovery Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 230000005494 condensation Effects 0.000 claims abstract description 20
- 238000009833 condensation Methods 0.000 claims abstract description 20
- 238000001704 evaporation Methods 0.000 claims abstract description 18
- 230000008020 evaporation Effects 0.000 claims abstract description 18
- 238000005192 partition Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 18
- 239000003245 coal Substances 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 claims description 5
- 238000007710 freezing Methods 0.000 abstract description 6
- 230000008014 freezing Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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Abstract
The invention discloses a mine return air waste heat recovery heat exchanger based on a variable heat conduction pipe, which comprises: the heat exchanger comprises variable heat conduction pipes, a fresh air heat exchange chamber and a return air heat exchange chamber, wherein the variable heat conduction pipes are vertically arranged side by side and penetrate through the fresh air heat exchange chamber and the return air heat exchange chamber, and the fresh air heat exchange chamber and the return air heat exchange chamber are separated by partition plates; the pipe section of the variable heat conduction pipe, which is positioned in the fresh air heat exchange chamber, is a condensation section, the upper part of the condensation section is provided with an air storage chamber, and the pipe section of the variable heat conduction pipe, which is positioned in the return air heat exchange chamber, is an evaporation section; the fresh air heat exchange chamber is communicated with the fresh air duct, and the return air heat exchange chamber is communicated with the return air duct. The mine return air waste heat recovery heat exchanger based on the variable heat conduction pipes realizes high-efficiency heat exchange and automatic control of the heat exchanger by utilizing the thermal switching performance of the variable heat conduction pipes, avoids the problems of freezing of condensed water in a return air heat exchange chamber and the like, and greatly improves the heat taking capacity of the heat exchanger.
Description
Technical Field
The invention relates to the technical field of mine return air waste heat utilization, in particular to a heat exchanger for recovering mine return air waste heat based on a variable heat conduction pipe.
Background
At the present stage, energy conservation and consumption reduction are taken as a long-term strategic task and are necessary choices for relieving energy constraint, reducing environmental pressure and ensuring economic safety and sustainable development. The mine return air temperature and humidity are basically constant throughout the year (the temperature is generally 15-20 ℃, and the relative humidity is more than or equal to 80%), and the return air volume is generally large, so the mine return air is a high-quality low-temperature waste heat resource in a coal mine system, the waste heat resource is recycled for preventing freezing of a shaft of a coal mine, a traditional coal-fired boiler is replaced or cancelled, the coal-fired consumption can be reduced, and the coal-fired pollution is reduced.
At present, though the heat pipe heat transfer technique for mine return air has certain advantage than traditional mine return air waste heat utilization technique, but is not mature, and the heat pipe heat exchanger for mine return air still has many problems that need to solve, for example: when the outdoor temperature is low, the condensed water at the return air side part of the heat exchanger freezes, and the heat exchange is influenced; when the heat pipe heat exchanger normally works, the temperature of the return air outlet is higher, and the heat taking capability is seriously limited; the reason is that the heat exchange effect of the existing heat pipe heat exchanger for mine return air is uncontrollable, and the heat exchanger cannot be suitable for different outdoor temperature conditions.
Disclosure of Invention
The invention aims to provide a mine return air waste heat recovery heat exchanger based on a variable heat conduction pipe, which adopts the variable heat conduction pipe as an intermediary of gas-gas heat exchange, realizes high-efficiency heat exchange and automatic control of the heat exchanger by utilizing the thermal switching performance of the variable heat conduction pipe, avoids the problems of freezing of condensed water in a return air heat exchange chamber and the like, and greatly improves the heat taking capacity of the heat exchanger.
In order to achieve the purpose, the invention provides the following scheme:
a mine return air waste heat recovery heat exchanger based on variable heat conduction pipes comprises: the heat exchanger comprises a variable heat conduction pipe, a fresh air heat exchange chamber and a return air heat exchange chamber, wherein the variable heat conduction pipes are vertically arranged side by side and penetrate through the fresh air heat exchange chamber and the return air heat exchange chamber, and the fresh air heat exchange chamber and the return air heat exchange chamber are separated by partition plates;
the pipe section of the variable heat conduction pipe, which is positioned in the fresh air heat exchange chamber, is a condensation section, the upper part of the condensation section is provided with an air storage chamber, and the pipe section of the variable heat conduction pipe, which is positioned in the return air heat exchange chamber, is an evaporation section;
the fresh air heat exchange chamber is communicated with a fresh air duct, and fresh air is heated in the fresh air heat exchange chamber and then is delivered to a coal mine well opening room through the fresh air duct; the return air heat exchange chamber is communicated with a return air duct, and mine return air generates condensed water when releasing heat in the return air heat exchange chamber.
Further, the phase change working medium in the variable heat conduction pipe is a low-temperature refrigerant.
Furthermore, a heat-insulating layer is arranged outside the air storage chamber.
Furthermore, a fresh air filter screen and a fresh air side balance fan are arranged at an air inlet of the fresh air heat exchange chamber, and the fresh air filter screen is arranged on the outer side of the fresh air side balance fan; the air inlet of the return air heat exchange chamber is provided with a return air filter screen and a return air side balance fan, and the return air filter screen is arranged on the outer side of the return air side balance fan.
Furthermore, a water collecting tray and a drain pipe are arranged at the bottom of the return air heat exchange chamber, the water collecting tray is used for collecting condensed water, and the drain pipe is communicated with the water collecting tray and used for discharging the condensed water out of the heat exchanger.
Furthermore, the variable heat conduction pipe is a spiral finned pipe, and fins are arranged on the outer walls of the heat pipes of the condensation section and the evaporation section.
Furthermore, the fresh air heat exchange chamber and the return air heat exchange chamber are provided with access channels every set number of variable heat conduction pipes, and the access channels are used for cleaning and overhauling the variable heat conduction pipes.
Furthermore, the shells of the two side surfaces of the fresh air heat exchange chamber and the return air heat exchange chamber can be detached, so that the heat exchangers can be conveniently used in a parallel combination mode.
Furthermore, the balance fan at the fresh air side and the balance fan for return air adopt variable-frequency explosion-proof fans.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the mine return air waste heat recovery heat exchanger based on the variable heat conduction pipes has the advantages that firstly, the high-efficiency heat exchange and automatic control of the heat exchanger are realized by utilizing the thermal switching performance of the variable heat conduction pipes, the structure is simple, the control efficiency is high, the temperature of the mine return air outlet of the heat exchanger can reach the level close to 0 ℃ under the condition that condensed water on the surfaces of heat pipe fins in a return air heat exchange chamber is not frozen, the problems of freezing of the condensed water in the return air heat exchange chamber and the like are avoided, and meanwhile, the heat taking capacity of the heat exchanger is greatly improved; secondly, the spiral finned tube is arranged on the outer wall of the variable heat conduction tube, so that condensed water can be collected and discharged conveniently, a large amount of latent heat resources are contained in mine return air, the mine return air is different from flue gas and has no problems of low-temperature corrosion and the like, and on the contrary, the heat exchanger efficiently recovers waste heat of the mine return air and simultaneously utilizes the condensed water of the mine return air to perform dust removal and cleaning effects on a return air heat exchange chamber; thirdly, a fresh air filter screen is arranged to prevent outdoor birds, fallen leaves and the like from entering the heat exchanger, a fresh air side balance fan is arranged behind the fresh air filter screen and used for balancing pressure loss generated at the fresh air side of the heat exchanger to meet the safety requirements of ventilation of coal mines, and a return air side balance fan is arranged behind the return air filter screen and used for balancing pressure loss generated at the return air side of the heat exchanger; fourthly, the heat exchanger is applied to preheating fresh air by recovering waste heat of mine return air, the mine return air has the characteristics of high air speed and large air quantity, the air resistance of the heat exchanger is required not to be too large, the shells of the two side surfaces of the fresh air heat exchange chamber and the return air heat exchange chamber are matched with practical application conditions, the parallel combination of the heat exchanger is convenient, and the heat exchanger is provided with an access way to facilitate cleaning and overhauling of a heat pipe.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a mine return air waste heat recovery heat exchanger based on a variable heat conduction pipe according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a variable heat pipe structure according to an embodiment of the present invention;
reference numerals: 1. a variable heat pipe; 2. a fresh air heat exchange chamber; 3. a return air heat exchange chamber; 4. a heat-insulating layer; 5. a partition plate;
101. an air reservoir; 102. a condensing section; 103. an evaporation section;
201. a fresh air filter screen; 202. a fresh air side balance fan;
301. a return air filter screen; 302. a balance fan at the return air side; 303. a water collection tray; 304. and a water discharge pipe.
Detailed Description
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, and not all of the embodiments. 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.
The invention aims to provide a mine return air waste heat recovery heat exchanger based on a variable heat conduction pipe, which adopts the variable heat conduction pipe as an intermediary of gas-gas heat exchange, realizes high-efficiency heat exchange and automatic control of the heat exchanger by utilizing the thermal switching performance of the variable heat conduction pipe, avoids the problems of freezing of condensed water in a return air heat exchange chamber and the like, and greatly improves the heat taking capacity of the heat exchanger.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-2, the heat exchanger for recovering mine return air waste heat based on a variable heat pipe according to an embodiment of the present invention includes: the heat exchanger comprises a variable heat conduction pipe 1, a fresh air heat exchange chamber 2 and a return air heat exchange chamber 3, wherein the variable heat conduction pipes 1 are vertically arranged side by side and penetrate through the fresh air heat exchange chamber 2 and the return air heat exchange chamber 3, and the fresh air heat exchange chamber 2 and the return air heat exchange chamber 3 are separated by a partition plate 5;
the pipe section of the variable heat conduction pipe 1 located in the fresh air heat exchange chamber 2 is a condensation section 102, the upper part of the condensation section 102 is provided with a gas storage chamber 101, and the pipe section of the variable heat conduction pipe 1 located in the return air heat exchange chamber 3 is an evaporation section 103;
the fresh air heat exchange chamber 2 is communicated with a fresh air duct, and fresh air is heated in the fresh air heat exchange chamber 2 and then is delivered to a coal mine well opening room through the fresh air duct; the return air heat exchange chamber 3 is communicated with a return air duct, and mine return air generates condensed water when heat is released in the return air heat exchange chamber 3.
And an insulating layer 4 is arranged outside the air storage chamber 101.
An air inlet of the fresh air heat exchange chamber 2 is provided with a fresh air filter screen 201 and a fresh air side balance fan 202, and the fresh air filter screen 201 is arranged on the outer side of the fresh air side balance fan 202; an air inlet of the return air heat exchange chamber 3 is provided with a return air filter screen 301 and a return air side balance fan 302, and the return air filter screen 301 is arranged on the outer side of the return air side balance fan 302.
The bottom of the return air heat exchange chamber 3 is provided with a water collecting tray 303 and a water discharging pipe 304, the water collecting tray 303 is used for collecting condensed water, and the water discharging pipe 304 is communicated with the water collecting tray 303 and used for discharging the condensed water out of the heat exchanger.
The variable heat conduction pipe 1 is a spiral finned pipe, and fins are arranged on the outer walls of the heat pipes of the condensation section 102 and the evaporation section 103.
The phase change working medium in the variable heat conduction pipe 1 is a low-temperature refrigerant, the phase change working medium is pressurized in the variable heat conduction pipe 1 until the boiling point of the low-temperature refrigerant is slightly higher than 0 ℃, a certain amount of non-condensable gas is filled, the heat flow on the evaporation section 103 side of the variable heat conduction pipe is different, the size of the area of the condensation section 102 of the variable heat conduction pipe occupied by the non-condensable gas is correspondingly changed, and then the thermal control adjustment of the variable heat conduction pipe heat exchanger is realized through the change of the thermal resistance of the variable heat conduction pipe.
The fresh air heat exchange chamber 2 and the return air heat exchange chamber 3 are provided with an access way every the variable heat conduction pipes 1 with the set number, the set number can be 4, namely, the access way is provided every 4 rows of heat pipes, and the access way is used for cleaning and overhauling the variable heat conduction pipes 1.
The shells of the two side surfaces of the fresh air heat exchange chamber 2 and the return air heat exchange chamber 3 can be detached, so that the heat exchangers can be conveniently used in a parallel combination mode.
The balance fan 202 on the fresh air side and the balance fan 302 on the return air side are respectively used for balancing pressure losses generated by the fresh air heat exchange chamber 2 and the return air heat exchange chamber 3 of the heat exchanger, and the requirements of adjusting the air speed and the air quantity and meeting the safety requirements of a coal mine are met, typically, the balance fans are frequency conversion explosion-proof fans.
The working principle of the heat exchanger for recovering the mine return air waste heat based on the variable heat conduction pipe is as follows:
the heat exchanger is a gas-gas heat exchanger, outdoor fresh air is introduced into a fresh air heat exchange chamber 2 and is heated by a variable heat conduction pipe 1 and then is sent to a coal mine well opening room, mine return air is sent to a return air heat exchange chamber 3 through a return air pipeline and is cooled by the variable heat conduction pipe 1, the heat release process of the mine return air is a dehumidifying and cooling process, mine return air vapor is condensed, latent heat is released and simultaneously condensed water is generated, and the condensed water is collected by a water collection disc 303 and then is discharged by a water discharge pipe 304.
The variable heat pipe 1 is vertically arranged and penetrates through the fresh air heat exchange chamber 2 and the return air heat exchange chamber 3, the gas storage chamber 101 of the variable heat pipe 1 is filled with non-condensable gas, and the evaporation section 103 is filled with phase-change working media (refrigerant); the working medium in the evaporation section 103 absorbs heat released by mine return air, changes from liquid state to gas state, and rises to the condensation section 102 of the variable heat conduction pipe, the gas working medium condenses in the condensation section 102 of the variable heat conduction pipe to release heat, and a condensate liquid is formed on the inner wall of the heat pipe and flows back to the evaporation section 103 of the variable heat conduction pipe, so that the heat exchange process is completed.
The invention is different from the common gravity type heat pipe: the variable heat conduction pipe adjusts the internal pressure to enable the boiling point of the internal working medium to be slightly higher than 0 ℃, then the heat control adjustment is realized by the size of the area of the condensation section of the variable heat conduction pipe occupied by the non-condensable gas in the variable heat conduction pipe, the starting temperature of the variable heat conduction pipe arranged on the heat exchanger is slightly higher than 0 ℃, and the high-efficiency heat exchange and automatic control of the heat exchanger are realized by utilizing the thermal switching performance of the variable heat conduction pipe. When the temperature of mine return air is higher, such as 15 ℃, the temperature difference between the mine return air and working media in the variable heat conduction pipe is larger, the heat flow of the evaporation section 103 of the variable heat conduction pipe is large, more working media with phase change and more gaseous working media are generated, more liquid working media in the evaporation section 103 absorb the heat emitted by the mine return air and change into gaseous state, a large amount of gaseous working media compress the non-condensable gas into the air storage chamber 101 of the variable heat conduction pipe, all areas in the condensation section 102 of the variable heat conduction pipe are gaseous working media, the gaseous working media condense and emit heat to be used for heating fresh air outside the pipe, and the heat exchange effect of the;
when the mine return air temperature is low, such as 5 ℃, the mine return air temperature is close to the starting temperature of the variable heat conducting pipe 1, the heat exchange quantity of the variable heat conducting pipe 1 is small, only a small amount of liquid working medium in the evaporation section 103 of the variable heat conducting pipe absorbs the heat emitted by the mine return air and turns into a gaseous state, the small amount of gaseous working medium is condensed and exchanges heat in the lower area of the condensation section 102 of the variable heat conducting pipe, and the upper area of the condensation section 102 of the variable heat conducting pipe is occupied by the non-condensable gas. At the moment, the heat exchange area of the condensation section of the variable heat conduction pipe is reduced and the thermal resistance is increased due to the adjustment of the non-condensable gas in the variable heat conduction pipe 1, so that the temperature of a water film on the surface of an outer fin of an evaporation section pipe 103 of the variable heat conduction pipe is close to the temperature of mine return air, and the problems that the temperature of the return air outlet of a common heat pipe exchanger is higher than 0 ℃ (5 ℃) and the condensate water freezes in a return air heat exchange chamber under the same condition are solved;
when the mine return air temperature is very low, the temperature is close to 0 ℃, the mine return air temperature is basically equal to the starting temperature of the variable heat conduction pipe, no working medium in the evaporation section 103 of the variable heat conduction pipe is basically changed into a gaseous working medium, the heat flow is very small, no working medium in the evaporation section 103 of the variable heat conduction pipe is basically changed into a gaseous working medium, the condensation section 102 of the variable heat conduction pipe is occupied by non-condensable gas, the variable heat conduction pipe cannot be started, the heat exchanger does not work, the mine return air close to 0 ℃ is discharged to the outdoor, and the condensed water close to 0 ℃ is collected by the water collection disc and discharged by the water discharge.
In addition, the variable heat conduction pipe heat exchanger is composed of heat pipe bundles composed of dozens of variable heat conduction pipes, an access way is arranged between the pipe bundles, and each variable heat conduction pipe is closed and is a heat transfer unit. When the same heat exchanger works, the working states of the variable heat conduction pipes at different positions are determined by the mine return air environment where the heat pipe is located. All the variable heat conduction pipes work together, so that the temperature of the air return outlet of the heat exchanger can reach the level close to 0 ℃ under the condition that condensed water on the surfaces of heat pipe fins in an air return heat exchange chamber is not frozen, the heat taking capacity of the heat exchanger is greatly improved, and meanwhile, the normal operation of the heat exchanger is not influenced by the damage of a single variable heat conduction pipe.
The variable heat conduction pipe provided by the invention can be filled with proper working medium and non-condensable gas according to design requirements, for example, the working medium is filled with more working medium and non-condensable gas in equal proportion when the boiling point of the working medium is not proper under atmospheric pressure, so that the internal pressure of the heat pipe is increased to proper pressure, then the thermal switching performance of the variable heat conduction pipe is adjusted along with the difference of mine return air temperature, and the high-efficiency heat exchange and automatic control of the heat exchanger are realized by fully utilizing the thermal switching performance of the variable heat conduction pipe.
The invention provides a mine return air waste heat recovery heat exchanger based on a variable heat conduction pipe, which is characterized in that firstly, the starting temperature of the variable heat conduction pipe is set to be slightly higher than 0 ℃, and the high-efficiency heat exchange and automatic control of the heat exchanger are realized through the thermal switching performance of the variable heat conduction pipe; the temperature of the mine return air outlet of the heat exchanger can reach the level close to 0 ℃ under the condition that condensed water on the surfaces of heat pipe fins in a return air heat exchange chamber is not frozen, so that the problems of freezing of the condensed water in the return air heat exchange chamber and the like are avoided, and the heat taking capacity of the heat exchanger is greatly improved; secondly, the spiral finned tube is arranged on the outer wall of the variable heat conduction tube, so that condensed water can be collected and discharged conveniently, a large amount of latent heat resources are contained in mine return air, the mine return air is different from flue gas and has no problems of low-temperature corrosion and the like, and on the contrary, the heat exchanger efficiently recovers waste heat of the mine return air and simultaneously utilizes the condensed water of the mine return air to perform dust removal and cleaning effects on a return air heat exchange chamber; thirdly, a fresh air filter screen is arranged to prevent outdoor birds, fallen leaves and the like from entering the heat exchanger, a fresh air side balance fan is arranged behind the fresh air filter screen and used for balancing pressure loss generated at the fresh air side of the heat exchanger to meet the safety requirements of ventilation of coal mines, and a return air side balance fan is arranged behind the return air filter screen and used for balancing pressure loss generated at the return air side of the heat exchanger; fourthly, the heat exchanger is applied to preheating fresh air by recovering waste heat of mine return air, the mine return air has the characteristics of high air speed and large air quantity, the air resistance of the heat exchanger is required not to be too large, the shells of the two side surfaces of the fresh air heat exchange chamber and the return air heat exchange chamber are matched with practical application conditions, the parallel combination of the heat exchanger is convenient, and the heat exchanger is provided with an access way to facilitate cleaning and overhauling of a heat pipe.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. The utility model provides a mine return air heat exchanger for waste heat recovery based on variable heat pipe which characterized in that includes: the heat exchanger comprises variable heat conduction pipes (1), a fresh air heat exchange chamber (2) and a return air heat exchange chamber (3), wherein the variable heat conduction pipes (1) are vertically arranged side by side and penetrate through the fresh air heat exchange chamber (2) and the return air heat exchange chamber (3), and the fresh air heat exchange chamber (2) and the return air heat exchange chamber (3) are separated by a partition plate (5);
the pipe section of the variable heat conduction pipe (1) located in the fresh air heat exchange chamber (2) is a condensation section (102), the upper part of the condensation section (102) is provided with a gas storage chamber (101), and the pipe section of the variable heat conduction pipe (1) located in the return air heat exchange chamber (3) is an evaporation section (103);
the fresh air heat exchange chamber (2) is communicated with a fresh air duct, and fresh air is heated in the fresh air heat exchange chamber (2) and then is delivered to a coal mine port room through the fresh air duct; the return air heat exchange chamber (3) is communicated with a return air duct, and mine return air generates condensed water when heat is released in the return air heat exchange chamber (3).
2. The variable heat pipe-based mine return air waste heat recovery heat exchanger is characterized in that an insulating layer (4) is arranged outside the air storage chamber (101).
3. The heat exchanger for mine return air waste heat recovery based on the variable heat conduction pipes as claimed in claim 1, wherein a fresh air filter screen (201) and a fresh air side balance fan (202) are arranged at an air inlet of the fresh air heat exchange chamber (2), and the fresh air filter screen (201) is arranged at the outer side of the fresh air side balance fan (202); the air inlet of the return air heat exchange chamber (3) is provided with a return air filter screen (301) and a return air side balance fan (302), and the return air filter screen (301) is arranged on the outer side of the return air side balance fan (302).
4. The mine return air waste heat recovery heat exchanger based on the variable heat conduction pipes is characterized in that a water collecting tray (303) and a drain pipe (304) are arranged at the bottom of the return air heat exchange chamber (3), the water collecting tray (303) is used for collecting condensed water, and the drain pipe (304) is communicated with the water collecting tray (303) and used for discharging the condensed water out of the heat exchanger.
5. The variable heat pipe-based mine return air waste heat recovery heat exchanger is characterized in that the variable heat pipe (1) is a spiral finned pipe, and fins are arranged on the outer walls of the heat pipes of the condensation section (102) and the evaporation section (103).
6. The heat exchanger for mine return air waste heat recovery based on the variable heat conduction pipe according to claim 1, wherein the working medium in the variable heat conduction pipe (1) is a low-temperature refrigerant.
7. The heat exchanger for recovering the mine return air waste heat based on the variable heat conduction pipes according to claim 1, wherein the fresh air heat exchange chamber (2) and the return air heat exchange chamber (3) are provided with an access way every set number of the variable heat conduction pipes (1), and the access way is used for cleaning and accessing the variable heat conduction pipes (1).
8. The heat exchanger for recovering the mine return air waste heat based on the variable heat conduction pipes as claimed in claim 1, wherein shells on two side faces of the fresh air heat exchange chamber (2) and the return air heat exchange chamber (3) are detachable, so that the heat exchangers can be conveniently used in a parallel combination mode.
9. The variable heat pipe-based mine return air waste heat recovery heat exchanger is characterized in that the fresh air side balance fan (202) and the return air balance fan (302) adopt variable-frequency explosion-proof fans.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110049361.5A CN112665070A (en) | 2021-01-14 | 2021-01-14 | Mine return air waste heat recovery heat exchanger based on variable heat conduction pipe |
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| CN202110049361.5A CN112665070A (en) | 2021-01-14 | 2021-01-14 | Mine return air waste heat recovery heat exchanger based on variable heat conduction pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550774A (en) * | 2021-08-05 | 2021-10-26 | 中南大学 | System and method for recycling waste heat of return air shaft in cold mine area |
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2021
- 2021-01-14 CN CN202110049361.5A patent/CN112665070A/en active Pending
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| CN207702656U (en) * | 2017-12-11 | 2018-08-07 | 北京中矿赛力贝特节能科技有限公司 | A kind of monoblock type mine return air gravity assisted heat pipe heat-exchange unit |
| CN109883226A (en) * | 2019-01-08 | 2019-06-14 | 贵州大学 | Cryo Heat Tube heat exchange air conditioning device and heat-exchange method for mine return air |
| CN214094796U (en) * | 2021-01-14 | 2021-08-31 | 河北工程大学 | Mine return air waste heat recovery heat exchanger based on variable heat conduction pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550774A (en) * | 2021-08-05 | 2021-10-26 | 中南大学 | System and method for recycling waste heat of return air shaft in cold mine area |
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