CN111609738A

CN111609738A - Heat exchanger

Info

Publication number: CN111609738A
Application number: CN202010583174.0A
Authority: CN
Inventors: 吕向阳; 孟国营; 王永军; 李建华; 姜敬; 卢学明; 马亚东; 刘双双; 赵旭; 李宝珍; 吕瑞杰; 翟宇; 张晓南
Original assignee: Tianjin Boyle Technology Co ltd; Beijing Sinomine Sailibeite Energy Saving Science & Technology Co ltd
Current assignee: Tianjin Boyle Technology Co ltd; Beijing Sinomine Sailibeite Energy Saving Science & Technology Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2020-09-01

Abstract

The invention discloses a heat exchange device, which belongs to the technical field of heat energy recovery and comprises a shell and a heat exchange structure arranged in the shell, wherein an air inlet and an air outlet are formed in the shell, a plurality of upper headers are arranged at the top of the shell, a plurality of lower headers which are arranged in one-to-one correspondence with the upper headers are arranged at the bottom of the shell, the heat exchange structure comprises a plurality of heat exchange tubes, the extension direction of each heat exchange tube and the flowing direction of wind form a preset included angle, and at least one heat exchange tube is communicated between each upper header and the corresponding lower header. Compared with the prior art, the heat exchange device provided by the invention can realize the recovery of heat contained in mine return air, and simultaneously avoids the direct contact of heat transfer media in the heat exchange pipes and air, thereby avoiding the blockage of a circulating pipeline and a circulating pump caused by dust contained in the heat transfer media, and reducing the maintenance difficulty.

Description

Heat exchanger

Technical Field

The invention relates to the technical field of heat energy recovery, in particular to a heat exchange device.

Background

In the coal industry at present, the contradiction between the serious environmental pollution of mining areas and the insufficient and effective utilization of coal mine waste heat resources is increasingly highlighted. The mine return air temperature is higher, and the amount of wind is great, and humidity, temperature remain invariable throughout the year, wherein contain a large amount of low temperature heat energy, and these heat energy often do not utilize and discharge and cause the waste of the energy. The heat energy is recycled to meet the heat consumption requirements of coal mine building heating, shaft freezing prevention and the like, and the traditional coal-fired boiler is replaced or cancelled, so that the coal consumption can be reduced, and the coal pollution is reduced.

At present, the mode of spray heat exchange is adopted to recover mine return air heat energy in the prior art, but the water consumption for spray heat exchange is large, and water is in direct contact with mine wind, so that the impurity content of dust and the like in water is large, a circulating pipeline and a circulating pump are easy to block, and the maintenance difficulty is large.

Disclosure of Invention

The invention aims to provide a heat exchange device, which is used for recycling the heat energy of the mine return air, avoiding the blockage of a circulating pipeline and a circulating pump and reducing the maintenance difficulty.

As the conception, the technical scheme adopted by the invention is as follows:

the utility model provides a heat exchange device, include the casing with set up in heat transfer structure in the casing, be provided with air intake and air outlet on the casing, the top of casing is provided with a plurality of upper header, and the bottom is provided with a plurality of lower header that upper header one-to-one set up, heat transfer structure includes a plurality of heat exchange tubes, the extending direction of heat exchange tube is with the flow direction of wind and predetermines the contained angle, every upper header and corresponding the intercommunication has at least one between the lower header the heat exchange tube.

Furthermore, the outer wall of the heat exchange tube is provided with a first heat exchange fin, and the first heat exchange fin is spirally extended along the extension direction of the heat exchange tube.

Furthermore, along the flowing direction of wind, a plurality of heat exchange tubes are divided into a plurality of groups, and each group of heat exchange tubes is communicated between one upper header and one lower header.

Furthermore, the heat exchange device further comprises a dust removal structure, and the dust removal structure comprises a support component arranged on the shell and a dust removal component detachably mounted on the support component.

Furthermore, a liquid inlet pipe is arranged on the lower collection box, and a liquid outlet pipe is arranged on the upper collection box.

Furthermore, an exhaust pipe is arranged on the upper header.

Furthermore, a water guide groove is formed in the bottom of the shell, a water drainage pipe is arranged on the shell, and the water drainage pipe is communicated with the water guide groove.

Further, a heat insulation layer and a protection structure are arranged outside the shell, and the heat insulation layer is clamped between the shell and the protection structure.

Furthermore, an access hole is formed in the shell, and a cover body capable of opening or closing the access hole is arranged on the shell.

Further, the preset included angle is 0-90 degrees.

The invention has the beneficial effects that:

the heat exchange device provided by the invention is provided with a shell and a heat exchange structure, wherein the shell is provided with an air inlet and an air outlet, the top of the shell is provided with a plurality of upper collecting boxes, the bottom of the shell is provided with a plurality of lower collecting boxes which are arranged in a one-to-one correspondence manner with the upper collecting boxes, the heat exchange structure is arranged in the shell and comprises a plurality of heat exchange tubes, the extension direction of each heat exchange tube and the flowing direction of wind form a preset included angle, and at least one heat exchange tube is communicated between each upper collecting box and the corresponding lower collecting box. Compared with the prior art, the recovery of heat contained in mine return air can be realized, and the direct contact between the heat transfer medium and air in the heat exchange pipe is avoided, so that the blockage of a circulating pipeline and a circulating pump caused by dust in the heat transfer medium is avoided, and the maintenance difficulty is reduced. In addition, each upper header, the corresponding lower header and the corresponding tube heat pipe form an independent heat exchanger, so that the heat transfer medium in each heat exchanger can be independently used, and the applicability of the heat exchange device is improved.

Drawings

FIG. 1 is a schematic view of a heat exchange device provided by the present invention.

In the figure:

1. a housing; 11. an upper header; 111. a liquid outlet pipe; 112. an exhaust pipe; 12. a lower header; 121. a liquid inlet pipe; 13. a water chute; 14. a drain pipe; 21. a heat exchange pipe; 21. a first heat exchange fin; 3. dust removal structure.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

This embodiment provides a heat transfer device, and this heat transfer device mainly used is to the recovery of the low temperature waste heat that the mine return air contained, and this heat transfer device still can be used to the recycle of waste heat such as high temperature flue gas, high temperature steam certainly.

As shown in fig. 1, the heat exchange device includes a housing 1 and a heat exchange structure disposed in the housing 1. Wherein, the shell 1 is provided with an air inlet and an air outlet, and mine return air flows into the shell 1 from the air inlet and is discharged from the air outlet. The top of casing 1 is provided with a plurality of upper header 11, and the bottom of casing 11 is provided with a plurality of lower header 12 that set up with a plurality of upper header 11 one-to-one, and in this embodiment, upper header 11 and lower header 12 all are located the casing 1 outside, and of course in other embodiments, upper header 11 and lower header 12 also can all be located inside casing 1. The heat exchange structure is arranged in the shell 1 and comprises a plurality of heat exchange tubes 21, the extending direction of the heat exchange tubes 21 is a preset included angle with the flowing direction of wind, and at least one heat exchange tube 21 is communicated between each upper header 11 and the corresponding lower header 12.

It can be understood that when the waste heat of the mine return air is recovered, the heat transfer medium flows in the heat exchange tube 21, the heat transfer medium exchanges heat with the mine return air through the tube wall of the heat exchange tube 21, the temperature of the mine return air is reduced, and the temperature of the heat transfer medium is increased. The heat transfer medium may be water, glycol solution or calcium chloride solution, and this embodiment is not particularly limited. And can avoid heat transfer medium and mine return air direct contact to can avoid heat transfer medium's circulating line and circulating pump to block up, reduce the maintenance degree of difficulty.

Further, in the present embodiment, the plurality of heat exchange tubes 21 are divided into a plurality of groups along the flowing direction of the wind, and each group of heat exchange tubes 21 is communicated between one upper header 11 and one lower header 12, and it can be understood that one upper header 11, one lower header 12 and the heat exchange tubes 21 communicated between the upper header 11 and the lower header 12 form an independent heat exchanger, that is, the heat exchange device includes a plurality of heat exchangers, so that the heat absorbed by the heat transfer medium in each heat exchanger can be used in different occasions, for example, along the flowing direction of the wind, the temperature of the heat transfer medium in the heat exchanger located in front is higher, and can be used for heating the coal mine building, and the temperature of the heat transfer medium in the heat exchanger located behind is lower, and can be used for domestic water of the residents in the coal mine. The heat transfer medium in the heat exchanger in the middle can be used for preventing the shaft from freezing, so that the heat in return air of the mine can be fully utilized.

Further, in order to improve the heat exchange efficiency, the outer wall of the heat exchange tube 21 is provided with a first heat exchange fin 211. Further preferably, in the present embodiment, the first heat exchange fin 211 extends spirally along the extending direction of the heat exchange tube 21. So set up, not only can increase heat transfer area, improve heat exchange efficiency, the comdenstion water that can be convenient for moreover outside the heat exchange tube 21 and on the first heat exchange fin 211 flows to the bottom of casing 1 along changing first heat fin 211. Of course, in other embodiments, the first heat exchange fin 211 may also be an annular fin extending along the circumferential direction of the heat exchange tube 21, or a triangular, fan-shaped, or quadrangular plate-shaped structure disposed on the heat exchange tube 21.

Further, in this embodiment, the thickness of the first heat exchange fin 211 is 0.5mm to 2mm, the pitch of the first heat exchange fin 211 is 3mm to 8mm, and the height of the first heat exchange fin 211 in the radial direction of the heat exchange tube 21 is 10mm to 15mm, but in other embodiments, the thickness, the pitch of the first heat exchange fin 211 and the height in the radial direction of the heat exchange tube 21 may be set according to actual needs.

Optionally, a plurality of second heat exchange fins are disposed in the heat exchange tube 21. Specifically, each of the second heat exchange fins extends along the extending direction of the heat exchange tube 21, and the plurality of second heat exchange fins are arranged at intervals in the circumferential direction of the heat exchange tube 21. The contact area between the heat transfer medium and the heat exchange tube 21 can be increased through the second heat exchange fins, and the heat exchange efficiency and the heat exchange effect can be improved.

Optionally, in order to prolong the residence time of the mine return air in the casing 1 and improve the heat exchange efficiency between the mine return air and the heat transfer medium, a plurality of heat insulation spoilers are arranged on the inner wall of the casing 1. Illustratively, the plurality of heat insulation spoilers are arranged in a staggered manner, an S-shaped air channel is formed between the plurality of heat insulation spoilers, and the heat exchange tubes 21 are all located in the S-shaped air channel. The flow state of the mine return air in the shell 1 is complicated by the heat insulation spoiler, the residence time of the mine return air in the shell 1 can be prolonged, the heat exchange efficiency of the mine return air and the heat exchange tube 21 is improved, heat exchange between the mine return air and the heat insulation spoiler can be avoided, and further the loss of heat contained in the mine return air is avoided.

As shown in fig. 1, the heat exchange device further comprises a dust removal structure 3, the dust removal structure 3 comprises a support component arranged on the shell 1 and a dust removal component detachably mounted on the support component, and impurities such as dust in mine return air are removed through the dust removal component, so that the dust content of the mine return air entering the shell 1 is reduced. Specifically, the dust removal assembly comprises a filter screen, and the filter screen is used for filtering dust in mine return air and preventing the excessive dust from entering the shell 1 and adhering to the outer wall of the heat exchange tube 21, the inner wall of the shell 1 and the heat exchange fins.

Further, a heat insulation layer and a protection structure are arranged outside the shell 1, and the heat insulation layer is clamped between the shell 1 and the protection structure. Through the setting of heat preservation, can avoid the heat of mine return air to outwards scatter and disappear through casing 1. Specifically, in this embodiment, the insulating layer is made of polyurethane, and the insulating layer is bonded to the housing 1, but in other embodiments, the insulating layer may also be made of other insulating materials, such as ceramic insulating materials, phenolic foam, and the like. Further preferably, in the embodiment, the thickness of the heat-insulating layer is 25mm-50 mm. In addition, in the present embodiment, the protection structure is an aluminum plate, but in other embodiments, the protection structure may also be a steel plate. It is further preferable that the thickness of the aluminum plate is 0.5mm in this embodiment, but in other embodiments, the thickness of the aluminum plate can be set according to actual needs.

In other embodiments, the casing 1 may be made of a heat insulating material to further improve the heat insulating effect, and prevent heat exchange between the mine return air and the casing 1, thereby preventing heat contained in the mine return air from being lost.

Further, as shown in fig. 1, a water guide groove 13 is provided on the inner side of the bottom of the housing 1, and a drain pipe 14 is provided on the housing 1, the drain pipe 14 communicating with the water guide groove 13. By providing the water guide groove 13, the condensed water flowing down the outer wall of the heat exchange pipe 21 and the inner wall of the casing 1 can be collected and discharged to the outside of the casing 1 through the water discharge pipe 14. In addition, it can be understood that the condensed water can flush the inner wall of the casing 1 or the outer wall of the heat exchange tube 21 in the process of flowing down, so that the dust on the inner wall of the casing 1 and the outer wall of the heat exchange tube 21 can be flushed into the diversion trench 13 and discharged out of the casing 1 through the drain tube 14, and the dust which is not removed by the dust removing structure 3 can be prevented from being accumulated on the outer wall of the heat exchange tube 21, thereby reducing the heat exchange efficiency.

Optionally, a plurality of cleaning nozzles are arranged in the casing 1, wherein one part of the cleaning nozzles can spray cleaning water to the inner wall of the casing 1, and the other part of the cleaning nozzles can spray cleaning water to the plurality of heat exchange tubes 21, so that the outer wall of the heat exchange tubes 21 and the inner wall of the casing 1 are cleaned, and the influence of dust accumulation on heat exchange between mine return air and a heat transfer medium is avoided.

Further, the housing 1 is provided with an access opening and a cover body capable of opening or closing the access opening. The heat exchange pipe 21 and the casing 1 can be maintained by entering the casing 1 through the access opening, and cleaning water can be sprayed into the casing 1 through the access opening to clean the heat exchange pipe 21 and the casing 1.

Further, each upper header 11 is provided with an exhaust pipe 112 and a liquid outlet pipe 111, and each lower header 12 is provided with a liquid inlet pipe 121. It will be appreciated that the heat transfer medium enters the lower header 12 through the inlet pipe 121 and flows upwardly through the heat exchange tubes 21 to the corresponding upper header 11 and is finally discharged through the outlet pipe 111. Of course, in other embodiments, inlet pipe 121 may be disposed on upper header 11 and outlet pipe 111 may be disposed on lower header 12. Further, by providing the exhaust pipe 112, the gas in the heat transfer medium can be exhausted. Further, an exhaust valve or the like may be provided in the exhaust pipe 112, and a controller connected to the exhaust valve may control the exhaust valve to periodically exhaust, or may periodically exhaust manually.

As shown in fig. 1, in the present embodiment, the preset included angle is 0 ° to 90 °, and further preferably, the preset included angle is 90 °.

Further, in the present embodiment, the diameter of the heat exchange tube 21 may be 20mm, 25mm, 32mm, etc., and the wall thickness of the heat exchange tube 21 is 2.5mm to 5 mm. In addition, in the embodiment, the heat exchange tubes 21 are arranged in multiple rows along the flow direction of the mine return air, at least two rows of heat exchange tubes 21 form a group of heat exchange tubes 21, and in the same group of heat exchange tubes 21, the distance between two adjacent rows of heat exchange tubes 21 is 50mm-100 mm. In the same row of heat exchange tubes 21, the distance between two adjacent heat exchange tubes 21 is 50mm-100 mm. Of course, in other embodiments, the distance between two adjacent heat exchange tubes 21 can be set according to actual needs.

In conclusion, the heat exchange device that this embodiment provided, through setting up casing 1 and heat transfer structure, be provided with air intake and air outlet on casing 1, casing 1's top is provided with a plurality of header 11 of going up, casing 1's bottom is provided with a plurality of lower header 12 with the setting of a plurality of header 11 one-to-ones that go up, heat transfer structure sets up in casing 1, heat transfer structure includes a plurality of heat exchange tubes 21, the extending direction of heat exchange tube 21 is with the flow direction of wind and predetermines the contained angle, the intercommunication has at least one heat exchange tube 21 between every header 11 and the lower header 12 that corresponds. Compared with the prior art, the recovery of heat contained in mine return air can be realized, and the direct contact between the heat transfer medium and air in the heat exchange tube 21 is avoided, so that the blockage of a circulating pipeline and a circulating pump caused by dust in the heat transfer medium is avoided, and the maintenance difficulty is reduced. In addition, each upper header 11, the corresponding lower header 12 and the corresponding pipe heat pipe 21 form an independent heat exchanger, so that the heat transfer medium in each heat exchanger can be independently used, and the applicability of the heat exchange device is improved.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a heat exchange device, its characterized in that, including casing (1) with set up in heat transfer structure in casing (1), be provided with air intake and air outlet on casing (1), the top of casing (1) is provided with a plurality of header (11) of going up, and the bottom is provided with a plurality of header (12) under a plurality of that go up header (11) one-to-one setting, heat transfer structure includes a plurality of heat exchange tubes (21), the extending direction of heat exchange tube (21) is with the flow direction of wind and predetermines the contained angle, every go up header (11) and correspond the intercommunication has at least one between header (12) down heat exchange tube (21).

2. The heat exchange device according to claim 1, wherein the heat exchange tube (21) is provided with a first heat exchange fin (211) on the outer wall, and the first heat exchange fin (211) extends spirally along the extension direction of the heat exchange tube (21).

3. A heat exchange device according to claim 1, wherein a plurality of the heat exchange tubes (21) are divided into a plurality of groups in the flow direction of the wind, each group of the heat exchange tubes (21) communicating between one of the upper header (11) and the lower header (12).

4. The heat exchange device according to claim 1, further comprising a dust removing structure (3), wherein the dust removing structure (3) comprises a supporting component arranged on the shell (1) and a dust removing component detachably mounted on the supporting component.

5. A heat exchange device according to claim 1, characterized in that the lower header (12) is provided with a liquid inlet pipe (121), and the upper header (11) is provided with a liquid outlet pipe (111).

6. A thermal installation according to claim 1, characterised in that an exhaust duct (112) is provided in the upper header (11).

7. The heat exchange device according to claim 1, characterized in that a water chute (13) is arranged at the bottom of the shell (1), a drain pipe (14) is arranged on the shell (1), and the drain pipe (14) is communicated with the water chute (13).

8. The heat exchange device according to claim 1, characterized in that an insulating layer and a protective structure are arranged outside the shell (1), and the insulating layer is sandwiched between the shell (1) and the protective structure.

9. The heat exchange device according to claim 1, wherein the shell (1) is provided with an access opening, and the shell (1) is provided with a cover body capable of opening or closing the access opening.

10. The heat exchange device of claim 1, wherein the predetermined included angle is between 0 ° and 90 °.