CN214198739U - Combined heat exchange device - Google Patents
Combined heat exchange device Download PDFInfo
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- CN214198739U CN214198739U CN202023307712.8U CN202023307712U CN214198739U CN 214198739 U CN214198739 U CN 214198739U CN 202023307712 U CN202023307712 U CN 202023307712U CN 214198739 U CN214198739 U CN 214198739U
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- 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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Abstract
A combined heat exchange device comprises combustion equipment, wherein an air inlet of the combustion equipment is communicated with an air channel through a pipeline, a smoke outlet of the combustion equipment is communicated with a flue through a pipeline, rotary air preheaters are arranged inside the middle upper parts of the air channel and the flue, the middle lower parts of the air channel and the flue are divided into two independent channels, a vacuum tube heat exchange device is embedded in the two independent channels, the vacuum tube heat exchange device comprises a heat exchange tube, a heat absorption end and a heat dissipation end of the heat exchange tube are respectively arranged in the flue and the air channel, the flue is connected with an air suction port of a suction fan through a pipeline, and the air channel is connected with an air outlet of an air blower through a pipeline; the heat exchange tube comprises a tube body, a heat exchange medium is arranged in the tube body, and the tube body is connected with a medium inlet and outlet device; the medium inlet and outlet device comprises a non-condensable gas exhaust device and/or a heat exchange medium supply device communicated with the interior of the pipe body, and a valve is arranged between the medium inlet and outlet device and the pipe body.
Description
Technical Field
The utility model relates to a heat transfer device's technical field especially relates to a combined type heat transfer device.
Background
At present, a rotary air preheater is commonly adopted in a coal-fired unit, because an SCR denitration device is adopted, the components of flue gas entering the air preheater are changed, redundant NH3 of the denitration SCR device escapes into the air preheater and then reacts with SO3 in a local flue gas environment to generate NH4HSO4, the liquid crystallization bonding temperature of the NH4HSO4 is mainly 180-130 ℃, and because the cold end temperature of the preheater is low, the NH4HSO4 easily forms a liquid sticky substance at the cold end of the flue gas side of the air preheater and is attached to the surface of a plate, the sticky crystal has viscosity and strong adhesion force, SO that viscous dust deposit is formed, the corrosion of the heating surface of a low-temperature section is aggravated, the through-flow resistance of the flue gas side is greatly increased, although measures such as high-pressure water ash flushing or steam ash blowing are adopted, the problems can not be solved ideally from the aspect of delivery. In order to solve the technical problem, patent No. 201922094932.8 discloses a combined heat exchange device, but because the inside heat transfer medium of vacuum tube (heat exchange tube) usually can take place chemical reaction with the heat exchange tube, produce non-condensable gas, non-condensable gas occupies heat exchange tube headspace, shortens the effective heat transfer length of heat exchange tube, influences the heat transfer of heat exchange tube, leads to heat exchange tube life-span and heat transfer efficiency to last the decline, in addition, the decline of vacuum and the disappearance of heat transfer medium also can reduce heat transfer efficiency. This is a disadvantage of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that it is not enough to exist to be exactly to prior art, and provide a combined heat transfer device, at the operation in-process or shut down and overhaul the in-process, can maintain or improve heat pipe heat transfer performance to the noncondensable gas in heat exchange tube supply heat transfer medium and/or the discharge heat exchange tube that became invalid or the performance reduces.
The scheme is realized by the following technical measures: a combined heat exchange device comprises combustion equipment, wherein an air inlet of the combustion equipment is communicated with an air channel through a pipeline, a smoke outlet of the combustion equipment is communicated with a flue through a pipeline, rotary air preheaters are arranged inside the middle upper parts of the air channel and the flue, the middle lower parts of the air channel and the flue are divided into two independent channels, a vacuum tube heat exchange device is embedded in the two independent channels, the vacuum tube heat exchange device comprises a heat exchange tube, a heat absorption end and a heat dissipation end of the heat exchange tube are respectively arranged in the flue and the air channel, the flue is connected with an air suction port of a suction fan through a pipeline, and the air channel is connected with an air outlet of an air blower through a pipeline; the heat exchange tube comprises a tube body, a heat exchange medium is arranged in the tube body, and the tube body is connected with a medium inlet and outlet device; the medium inlet and outlet device comprises a non-condensable gas exhaust device and/or a heat exchange medium supply device communicated with the interior of the pipe body, and a valve is arranged between the medium inlet and outlet device and the pipe body.
Preferably, the non-condensable gas discharging device comprises a gas collecting tank communicated with the interior of the pipe body, and a valve I is arranged between the gas collecting tank and the pipe body.
Preferably, the gas collecting tank is also connected with a valve II.
Preferably, the valve II is arranged between the gas collecting tank and the valve I, and a connecting device is arranged between the valve I and the valve II.
Preferably, the non-condensable gas exhaust device comprises a vacuum pumping device communicated with the interior of the tube body, and a valve I is arranged between the vacuum pumping device and the tube body.
Preferably, the heat exchange medium replenishing device comprises a heat exchange medium replenishing tank; and a valve I or a valve III is arranged between the heat exchange medium supply tank and the pipe body.
Preferably, the heat exchange medium supply tank is also connected with a valve IV.
Preferably, the valve IV is arranged between the heat exchange medium replenishing tank and the valve I or the valve III, and a connecting device is arranged between the valve I or the valve III and the valve IV.
Preferably, the connecting device is a high-sealability thread extension section or a seal ring clamping ring extension section or a welding section.
Preferably, the pipe body is connected with an extension section, the non-condensable gas discharging device and/or the heat exchange medium supplying device are/is arranged in the extension section, and the tail end of the extension section is detachably and fixedly connected with a sealing cover.
Preferably, the outside of the pipe body is provided with a wear-resistant and corrosion-resistant coating.
Preferably, heat exchange fins are arranged outside the tube body.
Preferably, a metal mesh or a capillary wick is arranged inside the pipe body.
Compared with the prior art, the utility model has the following advantage:
(1) the non-condensable gas can be discharged and the heat exchange medium can be supplied to the heat pipe which is failed or has reduced performance in the running process or the shutdown maintenance process, so that the heat exchange performance of the heat pipe is maintained or improved, and the heat pipe heat exchange device is kept in a better working state all the time; meanwhile, the service life of the heat pipe and the heat pipe exchanger can be greatly prolonged, so that the service life of equipment is saved.
(2) The outside wear-resisting anticorrosive coating that sets up of body improves wear-resisting and anticorrosive ability.
(3) When the non-condensable gas discharging device is a vacuumizing device communicated with the heat release end of the heat exchange tube, vacuumizing operation can be performed on the interior of the tube body, so that the vacuum degree in the tube body is improved, the heat exchange performance is further improved, and the starting temperature is reduced; meanwhile, the vacuum degree in the tube body can be adjusted, so that the heat exchange tube is matched with different working conditions.
(4) The metal mesh or the capillary core is arranged in the tube body, so that the flow of a heat exchange medium in the tube body can be strengthened, and the heat exchange efficiency is ensured.
Therefore, compared with the prior art, the utility model has the substantive characteristics and the progress, and the beneficial effects of the implementation are also obvious.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced 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 that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a combined heat exchange device;
FIG. 2 is a first schematic structural diagram of a heat exchange tube;
FIG. 3 is a schematic structural diagram II of a heat exchange tube;
fig. 4 is a schematic structural diagram three of the heat exchange tube.
In the figure: 1-combustion equipment, 2-air flue, 3-flue, 4-rotary air preheater, 4.1-rotating support, 4.2-heat storage plate, 4.2.1-upper heat storage plate, 4.2.2-lower heat storage plate, 4.3-speed reduction motor, 5-vacuum tube heat exchange device, 5.1-heat exchange tube, 5.1.1-heat exchange fin, 5.1.2-heat exchange medium, 5.1.3-gas collection tank, 5.1.4-valve I, 5.1.5-valve II, 5.1.6-connecting device, 5.1.7-sealing cover, 5.1.8-extension section, 5.1.9-vacuumizing device, 5.1.13-heat exchange medium supply tank, 5.1.14-valve III, 5.1.15-valve IV, 6-suction fan, 7-blower, 8-steam air heater, 9-mounting support and 10-ash bucket.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the following embodiments and drawings are applied to clearly and completely describe the technical solution protected by the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all 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 scope of protection of this patent.
Example 1
As shown in fig. 1-3, a combined heat exchange device, includes combustion apparatus 1, the air intake of combustion apparatus 1 passes through pipeline and wind channel 2 intercommunication, the outlet flue of combustion apparatus 1 passes through pipeline and flue 3 intercommunication, the well upper portion internally mounted of wind channel 2 and flue 3 have rotary air heater 4, wind channel 2 and flue 3 in the lower part cut apart into two independent passageways and embedded vacuum tube heat transfer device 5 that is equipped with, vacuum tube heat transfer device 5 include heat exchange tube 5.1, heat exchange tube 5.1 the heat absorption end and the heat dissipation end arrange flue 3 and wind channel 2 in respectively, flue 3 pass through the inlet scoop pipe joint of pipeline with suction fan 6, wind channel 2 pass through the air outlet pipe joint of pipeline with air-blower 7. The heat exchange tube 5.1 comprises a tube body, a heat exchange medium 5.1.2 is arranged in the tube body, and the heat release end of the heat exchange tube is communicated with a non-condensable gas discharge device and a heat exchange medium supply device; the non-condensable gas discharge device comprises a gas collection tank 5.1.3 communicated with the interior of the pipe body, and a valve I5.1.4 is arranged between the gas collection tank 5.1.3 and the pipe body; a valve II 5.1.5 is arranged between the gas collection tank 5.1.3 and the valve I5.1.4, and a connecting device 5.1.6 is arranged between the valve I5.1.4 and the valve II 5.1.5; the heat exchange medium replenishing device comprises a heat exchange medium replenishing tank 5.1.13, wherein the heat exchange medium replenishing tank 5.1.13 is communicated with the interior of the pipe body through a valve I5.1.4 or a valve III 5.1.14, a valve IV 5.1.15 is arranged between the heat exchange medium replenishing tank 5.1.13 and the valve I5.1.4 or the valve III 5.1.14, and the valve IV 5.1.15 is connected with the valve I5.1.4 or the valve III 5.1.14 through a connecting device.
The tube body is connected with an extension section 5.1.8, the non-condensable gas discharging device and/or the heat exchange medium supplying device are/is arranged in the extension section 5.1.8, and the tail end of the extension section 5.1.8 is detachably and fixedly connected with a sealing cover 5.1.7; a wear-resistant anticorrosive coating is arranged outside the pipe body; heat exchange fins 5.1.1 are arranged outside the tube body; and a metal mesh or a capillary core is arranged in the pipe body.
In the working engineering, water in a heat exchange medium in the heat exchange tube 5.1 and non-condensable gas such as hydrogen generated by reaction of iron gather at the top of the heat exchange tube 5.1, the actual working length of the heat exchange tube 5.1 can be reduced, when the non-condensable gas in the heat exchange tube 5.1 is gathered to a certain amount, the valve I5.1.4 and the valve II 5.1.5 are opened in sequence, the non-condensable gas is discharged into the gas collection tank 5.1.3, so that the working length of the heat exchange tube 5.1 is recovered, when the gas collection tank 5.1.3 is filled with the non-condensable gas, the valve II 5.1.5 and the valve I5.1.4 can be closed, a connecting device 5.1.6 between the valve II 5.1.5 and the valve I5.1.4 is disconnected, the valve II 5.1.5 is opened to carry out exhaust and vacuum pumping treatment on the gas collection tank 5.1.3, and the treated gas collection tank 5.1.3 can be connected to the valve I again to collect the non-condensable gas; and opening the valve IV 15, the valve I4 or the valve III 14 to replenish a heat exchange medium in the heat exchange pipe, closing the valve IV 15, the valve I4 or the valve III 14 after no heat exchange medium exists in the heat exchange medium replenishing tank 13, disconnecting the connecting device 6 between the valve IV 15 and the valve I4 or the valve III 14, and opening the valve IV 15 to replenish the heat exchange medium in the heat exchange medium replenishing tank 13. The connecting means 5.1.6 may be a high-tightness thread extension, or a sealing ring snap ring extension, or a welding extension.
In addition, valve II 5.1.5 sets up in the top of gas collecting tank 5.1.3, gas collecting tank 5.1.3 directly communicates with the inside of heat exchange tube 5.1 through valve I5.1.4, carries out exhaust and evacuation processing through valve II 5.1.5 to gas collecting tank 5.1.3, when exhausting and evacuating, need not dismantle gas collecting tank 5.1.3.
Example 2
As shown in fig. 4, a combined heat exchange device, including combustion apparatus 1, the air intake of combustion apparatus 1 passes through pipeline and wind channel 2 intercommunication, the outlet flue of combustion apparatus 1 passes through pipeline and flue 3 intercommunication, the well upper portion internally mounted of wind channel 2 and flue 3 have rotary air heater 4, wind channel 2 and flue 3 in the lower part cut apart into two independent passageways and embedded vacuum tube heat transfer device 5 that is equipped with, vacuum tube heat transfer device 5 include heat exchange tube 5.1, heat absorption end and the heat dissipation end of heat exchange tube 5.1 arrange flue 3 and wind channel 2 in respectively, flue 3 pass through the inlet scoop pipe connector of pipeline and suction fan 6, wind channel 2 pass through the air outlet pipe connector of pipeline and air-blower 7. The heat exchange tube 5.1 comprises a tube body, a heat exchange medium 5.1.2 is arranged in the tube body, and the heat release end of the heat exchange tube 5.1 is communicated with a non-condensable gas discharge device and a heat exchange medium supply device; the non-condensable gas discharging device comprises a vacuumizing device 5.1.9 communicated with the interior of the tube body, and a valve I5.1.4 is arranged between the vacuumizing device 5.1.9 and the tube body; the heat exchange medium replenishing device comprises a heat exchange medium replenishing tank 5.1.13, and the heat exchange medium replenishing tank 5.1.13 is communicated with the interior of the pipe body through a valve IV 5.1.15 and a valve III 5.1.14.
The tube body is connected with an extension section 5.1.8, the non-condensable gas discharging device and/or the heat exchange medium supplying device are/is arranged in the extension section 5.1.8, and the tail end of the extension section 5.1.8 is detachably and fixedly connected with a sealing cover 5.1.7; a wear-resistant anticorrosive coating is arranged outside the pipe body; heat exchange fins 5.1.1 are arranged outside the tube body; and a metal mesh or a capillary core is arranged in the pipe body.
In the working engineering, non-condensable gases such as hydrogen generated by the reaction of water and iron in a heat exchange medium 5.1.2 in the heat exchange tube 5.1 gather at the top of the heat exchange tube 5.1, the actual working length of the heat exchange tube 5.1 can be reduced, when the non-condensable gases in the heat exchange tube 5.1 are gathered to a certain amount, a valve I5.1.4 is opened, the non-condensable gases in the tube body are discharged through a vacuumizing device 5.1.9, and therefore the working length of the heat exchange tube 5.1 is recovered; and opening the valve IV 15 and the valve III 14 to supply heat exchange medium to the heat exchange tube, closing the valve IV 15 and the valve III 14 when no heat exchange medium exists in the heat exchange medium supply tank 13, disconnecting the connecting device 6 between the valve IV 15 and the valve III 14, and opening the valve IV 15 to supply heat exchange medium to the heat exchange medium supply tank 13.
In addition, the valve iv 5.1.15 is disposed on one side of the heat exchange medium supply tank 5.1.13, and the heat exchange medium supply tank 5.1.13 is directly communicated with the inside of the heat exchange inner tube 5.1 through the valve iii 5.1.14, so that when the heat exchange medium needs to be supplied to the heat exchange medium supply tank 5.1.13, the heat exchange medium supply tank 5.1.13 does not need to be detached.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features and inventive features disclosed herein.
Claims (13)
1. A combined heat exchange device is characterized in that: the air-conditioning system comprises combustion equipment (1), wherein an air inlet of the combustion equipment (1) is communicated with an air channel (2) through a pipeline, a smoke outlet of the combustion equipment (1) is communicated with a flue (3) through a pipeline, rotary air preheaters (4) are arranged inside the middle upper parts of the air channel (2) and the flue (3), the middle lower parts of the air channel (2) and the flue (3) are divided into two independent channels, and a vacuum tube heat exchange device (5) is embedded in the two independent channels, the vacuum tube heat exchange device (5) comprises a heat exchange tube (5.1), the heat absorption end and the heat dissipation end of the heat exchange tube (5.1) are respectively arranged in the flue (3) and the air channel (2), the flue (3) is connected with an air suction port of a suction fan through a pipeline, and the air channel (2) is connected with an air outlet of an air blower through a pipeline; the heat exchange tube (5.1) comprises a tube body, wherein a heat exchange medium (5.1.2) is arranged in the tube body, and the tube body is connected with a medium inlet and outlet device; the medium inlet and outlet device comprises a non-condensable gas exhaust device and/or a heat exchange medium supply device communicated with the interior of the pipe body, and a valve is arranged between the medium inlet and outlet device and the pipe body.
2. The combined heat exchange device of claim 1, wherein: the non-condensable gas discharge device comprises a gas collection tank (5.1.3) communicated with the interior of the tube body, and a valve I (5.1.4) is arranged between the gas collection tank (5.1.3) and the tube body.
3. The combined heat exchange device of claim 2, wherein: the gas collection tank (5.1.3) is also connected with a valve II (5.1.5).
4. The combined heat exchange device of claim 3, wherein: the valve II (5.1.5) is arranged between the gas collection tank (5.1.3) and the valve I (5.1.4), and a connecting device (5.1.6) is arranged between the valve I (5.1.4) and the valve II (5.1.5).
5. The combined heat exchange device of claim 1, wherein: the non-condensable gas discharging device comprises a vacuumizing device (5.1.9) communicated with the interior of the tube body, and a valve I (5.1.4) is arranged between the vacuumizing device (5.1.9) and the tube body.
6. The combined heat exchange device of claim 1, wherein: the heat exchange medium replenishing device comprises a heat exchange medium replenishing tank (5.1.13); and a valve I (5.1.4) or a valve III (5.1.14) is arranged between the heat exchange medium supply tank (5.1.13) and the pipe body.
7. The combined heat exchange device of claim 6, wherein: the heat exchange medium replenishing tank (5.1.13) is also connected with a valve IV (5.1.15).
8. The combined heat exchange device of claim 7, wherein: the valve IV (5.1.15) is arranged between the heat exchange medium replenishing tank (5.1.13) and the valve I (5.1.4) or the valve III (5.1.14), and a connecting device (5.1.6) is arranged between the valve I (5.1.4) or the valve III (5.1.14) and the valve IV (5.1.15).
9. The combined heat exchange device according to claim 4 or 8, wherein: the connecting device (5.1.6) is a high-sealing thread extension section or a sealing ring clamping ring extension section or a welding section.
10. The combined heat exchange device of claim 1, wherein: the pipe body is connected with an extension section (5.1.8), the non-condensable gas discharging device and/or the heat exchange medium supplying device are/is arranged in the extension section (5.1.8), and the tail end of the extension section (5.1.8) is detachably and fixedly connected with a sealing cover (5.1.7).
11. The combined heat exchange device of claim 1, wherein: and a wear-resistant anticorrosive coating is arranged outside the pipe body.
12. The combined heat exchange device of claim 1, wherein: heat exchange fins (5.1.1) are arranged outside the tube body.
13. The combined heat exchange device of claim 1, wherein: and a metal mesh or a capillary core is arranged in the pipe body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023307712.8U CN214198739U (en) | 2020-12-31 | 2020-12-31 | Combined heat exchange device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023307712.8U CN214198739U (en) | 2020-12-31 | 2020-12-31 | Combined heat exchange device |
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| Publication Number | Publication Date |
|---|---|
| CN214198739U true CN214198739U (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023307712.8U Active CN214198739U (en) | 2020-12-31 | 2020-12-31 | Combined heat exchange device |
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| CN (1) | CN214198739U (en) |
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2020
- 2020-12-31 CN CN202023307712.8U patent/CN214198739U/en active Active
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