CN210741179U - Water heat medium heat exchanger without low-temperature corrosion - Google Patents
Water heat medium heat exchanger without low-temperature corrosion Download PDFInfo
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- CN210741179U CN210741179U CN201921011267.5U CN201921011267U CN210741179U CN 210741179 U CN210741179 U CN 210741179U CN 201921011267 U CN201921011267 U CN 201921011267U CN 210741179 U CN210741179 U CN 210741179U
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Abstract
The utility model provides a no low temperature corrosion's hydrothermal media heat exchanger, including medium heat exchanger and gas heater. The medium heat exchanger comprises a first heat exchange tube bundle, a medium channel and a medium bypass pipeline; the flue gas heat exchanger comprises a second heat exchange tube bundle, and the second heat exchange tube bundle is in fluid communication with the first heat exchange tube bundle; one end of the medium bypass line is in fluid communication with the inlet of the medium channel, and the other end of the medium bypass line is in fluid communication with the outlet of the medium channel. According to the utility model discloses a hydrothermal media heat exchanger sets up medium bypass pipeline, makes partial medium not pass through the medium heat exchanger heat transfer winter and under the low-load operating mode, can prevent that exhaust gas temperature is too low and take place flue gas dew point corrosion for the hydrothermal media heat exchanger that does not have low temperature corrosion can long period operation under the variable operating mode, has stronger adaptability.
Description
Technical Field
The utility model relates to the field of machinary, in particular to no low temperature corrosion's hydrothermal media heat exchanger.
Background
The air preheater is the main equipment for recovering the waste heat at the tail part of the boiler or the heating furnace. The problems of air preheater corrosion, ash deposition, smoke exhaust temperature and the like exist in waste heat boilers, heating furnaces, fuel oil and coal-fired boilers and the like of enterprises such as catalytic cracking devices, atmospheric and vacuum distillation devices, hydrogenation hydrogen production devices, coking devices, thermal power stations and the like of petrochemical enterprises. At present, the air preheaters usually adopted on boilers and heating furnaces are mainly tubular air preheaters, heat pipe air preheaters and plate type air preheaters, the preheaters cannot avoid dew point corrosion, cannot adapt to variable working condition operation, and are short in service life.
Therefore, there is a need to provide a hydrothermal media heat exchanger that at least partially addresses the above problems.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.
For at least partly solving above-mentioned problem, the utility model provides a no low temperature corrosion's hydrothermal medium heat exchanger, include:
a medium heat exchanger; the medium heat exchanger comprises a first heat exchange tube bundle, a medium channel and a medium bypass pipeline;
a flue gas heat exchanger comprising a second heat exchange tube bundle in fluid communication with the first heat exchange tube bundle;
wherein one end of the medium bypass line is in fluid communication with the inlet of the medium passage, and the other end of the medium bypass line is in fluid communication with the outlet of the medium passage.
According to the utility model discloses a hydrothermal media heat exchanger sets up medium bypass pipeline, makes partial medium not pass through the medium heat exchanger heat transfer winter and under the low-load operating mode, can prevent that exhaust gas temperature is too low and take place flue gas dew point corrosion for the hydrothermal media heat exchanger that does not have low temperature corrosion can long period operation under the variable operating mode, has stronger adaptability.
Further, the medium bypass pipeline is provided with a regulating valve.
Further, the flue gas heat exchanger also comprises a flue, the second heat exchange tube bundle comprises a straight tube and an elbow, a welding seam is arranged at the joint of the elbow and the straight tube, the straight tube penetrates through the flue, and the elbow and the welding seam are arranged outside the flue.
According to the utility model discloses a water heat medium heat exchanger, elbow and welding seam are arranged outside the flue, can avoid the flue gas to erode elbow department welding seam, prevent to corrode the welding seam and cause the flue gas to reveal.
Further, the flue gas heat exchanger still includes the elbow case, the elbow case be located outside the flue and with flue sealing connection, the elbow case be used for holding the elbow with the elbow welding seam.
According to the utility model discloses a hydrothermal medium heat exchanger, the elbow case can play protection and heat retaining effect to elbow and welding seam.
Optionally, the hydrothermal medium heat exchanger further comprises a heat exchange circulation component, the heat exchange circulation component is connected between the first heat exchange tube bundle and the second heat exchange tube bundle, and the heat exchange circulation component is in fluid communication with the first heat exchange tube bundle and the second heat exchange tube bundle.
Further, the heat exchange circulation component includes a first pipe, a second pipe and a circulation pump, the first pipe is in fluid communication with an input end of the first heat exchange tube bundle and an output end of the second heat exchange tube bundle, the second pipe is in fluid communication with an output end of the first heat exchange tube bundle and an input end of the second heat exchange tube bundle, and the circulation pump is located in the first pipe or the second pipe.
Further, the heat exchange circulation part further includes a bypass pipe communicating the first pipe and the second pipe.
Further, the medium heat exchanger also includes a first shell, the first heat exchanger tube bundle and the medium passage being within the first shell;
the flue gas heat exchanger also includes a second shell, the second heat exchange tube bundle, the flue and the header box being within the second shell.
Optionally, the first heat exchange tube bundle and the second heat exchange tube bundle are spiral finned tubes, finned tubes or H-shaped finned tubes; and/or
The first heat exchange tube bundle and the second heat exchange tube bundle are made of low-carbon steel, ND steel or stainless steel.
Optionally, the first housing and the second housing are of a rectangular parallelepiped frame structure, a housing wall is disposed on a side surface of the rectangular parallelepiped frame structure, and openings are disposed on a top surface and a bottom surface of the rectangular parallelepiped frame structure, so as to facilitate passage of smoke or a medium.
Optionally, the first and second heat exchanger tube bundles are configured as channel steel supported independent tube bank structures, the first and second heat exchanger tube bundles being arranged in a horizontal or vertical direction.
According to the utility model discloses a hydrothermal media heat exchanger sets up the medium bypass pipeline and can make partial medium not pass through the medium heat exchanger heat transfer under winter and low-load operating mode to prevent to take place flue gas dew point corrosion because of exhaust gas temperature is too low, make the hydrothermal media heat exchanger that does not have low temperature corrosion can long period operation under the variable operating mode, have stronger adaptability; the elbow and the welding line are arranged outside the flue, so that the flue gas can be prevented from scouring the welding line at the elbow, and the flue gas leakage caused by corrosion of the welding line is prevented; the elbow box can also play the effect of protection and heat preservation to elbow and welding seam.
Drawings
The following drawings of the embodiments of the present invention are provided as a part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,
fig. 1 is a schematic structural diagram of a hydrothermal medium heat exchanger without low temperature corrosion according to the present invention.
Description of reference numerals:
1: the medium heat exchanger 2: smoke heat exchanger
3: heat exchange cycle member 11: first heat exchange tube bundle
12: medium passage 13: medium bypass line
14: the regulating valve 21: second heat exchange tube bundle
22: flue 23: elbow box
31: first pipe 32: second pipeline
33: bypass line 34: circulating pump
35: the adjusting device 36: temperature meter
37: oxygen-removed water supply pipe 38: elbow bend
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring embodiments of the present invention.
In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the invention. It is apparent that the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art.
The utility model provides a no low temperature corrosion's hydrothermal media heat exchanger please refer to fig. 1, including medium heat exchanger 1 and gas heater 2. The medium heat exchanger 1 comprises a first heat exchanger tube bundle 11, a medium channel 12 and a medium bypass line 13. The medium heat exchanger 1 can be, for example, an air preheater, a feedwater preheater, a cold fluid preheater or another medium preheater. The flue gas heat exchanger 2 comprises a flue 22, a second heat exchanger tube bundle 21 and an elbow box 23.
Second heat exchange tube bundle 21 is in fluid communication with first heat exchange tube bundle 11, and circulating water circulates in first heat exchange tube bundle 11 and second heat exchange tube bundle 21, the circulating water transferring heat from flue gas passing through flue 22 to the medium passing through medium passage 12.
Wherein one end of the medium bypass line 13 is in fluid communication with the inlet of the medium channel 12 and the other end of the medium bypass line 13 is in fluid communication with the outlet of the medium channel 12, so that part of the medium is diverted into the medium bypass line without contacting the first heat exchanger tube bundle 11. To control the degree of diversion, the medium bypass line 13 is provided with a regulating valve 14. The regulating valve 14 is preferably a manual or automatic regulating valve.
According to the utility model discloses a hydrothermal media heat exchanger sets up medium bypass line 13, makes partial medium not pass through 1 heat transfer of medium heat exchanger under winter and the low-load operating mode, can prevent that exhaust gas temperature is too low and take place flue gas dew point corrosion for the hydrothermal media heat exchanger that does not have low temperature corrosion can long period operation under the variable operating mode, has stronger adaptability.
With continued reference to FIG. 1, second heat exchange tube bundle 21 includes a straight tube and an elbow 38, the junction of elbow 38 and the straight tube having a weld, the straight tube passing through flue 22, the second heat exchange tube bundle 21 being disposed in a back and forth coiled manner as a whole. And elbow 38 and the weld of second heat exchange tube bundle 21 are outside stack 22, elbow 38 is U-shaped.
According to the utility model discloses a water heat medium heat exchanger, elbow 38 and welding seam are arranged outside flue 22, can avoid the flue gas to erode the welding seam of elbow 38 department, prevent to corrode the welding seam and cause the flue gas to reveal.
The flue gas heat exchanger 2 further comprises an elbow box 23, the elbow box 23 is located outside the flue 22 and is connected with the flue 22 in a sealing mode, and the elbow box 23 is used for accommodating the elbow 38 and the welding seam.
According to the utility model discloses a hydrothermal medium heat exchanger, elbow case 23 can play protection and heat retaining effect to elbow 38 and welding seam.
Preferably, the hydrothermal medium heat exchanger further comprises a heat exchange circulation part 3, the heat exchange circulation part 3 comprises a first pipe 31, a second pipe 32, a bypass pipe 33 and a circulation pump 34, and the heat exchange circulation part 3 is connected between the first heat exchange tube bundle 11 and the second heat exchange tube bundle 21 and is in fluid communication with the first heat exchange tube bundle 11 and the second heat exchange tube bundle 21.
Specifically, first conduit 31 is in fluid communication with an input of first heat exchange tube bundle 11, an output of second heat exchange tube bundle 21, second conduit 32 is in fluid communication with an output of first heat exchange tube bundle 11, an input of second heat exchange tube bundle 21, bypass conduit 33 communicates first conduit 31 with second conduit 32, and circulation pump 34 is located on either first conduit 31 or second conduit 32. Preferably, a circulation pump 34 is provided on the second conduit 32. More preferably, a plurality of circulation pumps 34 may be provided to form a circulation pump group so that the hydrothermal medium heat exchanger can continue to operate when one of the circulation pumps 34 fails, such as two circulation pumps 34 forming a circulation pump group in the illustrated embodiment.
In an alternative embodiment, one end of the bypass conduit 33 is disposed between the inlet of the circulation pump 34 and the output of the first heat exchange tube bundle 11, and the other end of the bypass conduit 33 is connected to the first conduit 31. In embodiments not shown, the bypass line 33 may also be provided at other locations.
Preferably, the bypass conduit 33 is provided with an adjusting device 35, the adjusting device 35 preferably being a manual or automatic adjusting valve. The conditioning device 35 is used to stably maintain the temperature of the flue gas entering the flue gas heat exchanger 2 above the acid dew point of the flue gas, for example, the acid dew point is generally designed to be 100 ℃ to 130 ℃.
Preferably, the heat exchange circulation part 3 is further provided with an oxygen-removed water feed pipe 37, and the corrosion of the equipment can be further reduced by using oxygen-removed water as a heat exchange medium.
In order to master the effect of heat exchange, thermometers 36 are respectively arranged at the position where the first pipe 31 is close to the output end of the second heat exchange tube bundle 21 and at the position where the second pipe 32 is close to the input end of the second heat exchange tube bundle 21.
Preferably, the medium heat exchanger 1 further comprises a first housing (not shown) and the flue gas heat exchanger 2 further comprises a second housing (not shown). A first heat exchange tube bundle 11 and media passages 12 are within the first shell; second heat exchange tube bundle 21, flue 22 and header box 23 are within the second shell.
The first shell and the second shell are preferably of a cuboid frame structure, the side faces of the cuboid frame structure are provided with shell walls, the top face and the bottom face of the cuboid frame structure are provided with openings so as to facilitate the passing of smoke or media, a set of opposite side faces of the cuboid frame structure are respectively provided with at least two support legs (not shown), and equipment in the first shell and the second shell is fixed on the frame through the support legs.
Preferably, the medium heat exchanger 1 and the flue gas heat exchanger 2 are modular devices. The specific explanation is that a plurality of heat exchange tube bundles in the first shell and the second shell can be connected in parallel, the heat exchange tube bundles in the shells are arranged in a drawer type mode by means of supporting legs, and any one group of heat exchange tube bundles can be independently drawn out for replacement. The modularized equipment is assembled in a factory manufacturing field, so that the manufacturing quality can be ensured, and the field installation workload is reduced.
Preferably, the first heat exchange tube bundle 11 and the second heat exchange tube bundle 21 are of the type of a spiral finned tube, a finned tube or an H-type finned tube; the first heat exchange tube bundle 11 and the second heat exchange tube bundle 21 are made of low carbon steel, ND steel (sulfuric acid low temperature dew point corrosion resistant steel) or stainless steel.
Preferably, the outer surface of the lowermost pipe of the flue gas heat exchanger 2 is coated with an anticorrosive paint, such as a polyvinyl fluoride paint resistant to acid corrosion.
Preferably, first and second heat exchange tube bundles 11 and 21 are constructed in a channel-steel-supported independent tube bank structure, and first and second heat exchange tube bundles 11 and 21 are arranged in a horizontal direction or a vertical direction. The channel steel supporting independent tube row structure is a supporting structure formed by enabling the pipeline of the tube row to penetrate through a through hole formed in the channel steel, and the channel steel is not connected with the channel steel. On one hand, the structure overcomes the defects of complexity and difficult manufacturing and assembling of the conventional tube plate structure, and improves the manufacturing quality; on the other hand, the tube bank can be replaced by drawing out the whole tube bank, so that the tube bank is convenient to overhaul and replace integrally, and the construction difficulty of field maintenance is reduced.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. It will be appreciated by those skilled in the art that many more modifications and variations are possible in light of the above teaching and are intended to be included within the scope of the invention.
Claims (11)
1. A hydrothermal medium heat exchanger without low-temperature corrosion is characterized by comprising:
a medium heat exchanger; the medium heat exchanger comprises a first heat exchange tube bundle, a medium channel and a medium bypass pipeline;
a flue gas heat exchanger comprising a second heat exchange tube bundle in fluid communication with the first heat exchange tube bundle;
wherein one end of the medium bypass line is in fluid communication with the inlet of the medium passage, and the other end of the medium bypass line is in fluid communication with the outlet of the medium passage.
2. The hydrothermal media heat exchanger of claim 1, wherein the media bypass line is provided with a regulating valve.
3. The hydrothermal media heat exchanger of claim 1, wherein the flue gas heat exchanger further comprises a flue, the second heat exchange tube bundle comprises a straight tube and an elbow, a weld is formed at the joint of the elbow and the straight tube, the straight tube penetrates through the flue, and the elbow and the weld are outside the flue.
4. The hydrothermal media heat exchanger of claim 3, wherein the flue gas heat exchanger further comprises an elbow box located outside the flue and in sealed connection with the flue, the elbow box being configured to receive the elbow and the weld.
5. The hydrothermal media heat exchanger of claim 1, further comprising a heat exchange circulation component connected between the first and second heat exchange tube bundles, and the heat exchange circulation component is in fluid communication with the first and second heat exchange tube bundles.
6. The hydrothermal media heat exchanger of claim 5, wherein the heat exchange circulation component comprises a first pipe, a second pipe and a circulation pump,
the first tubes are in fluid communication with an input end of the first heat exchange tube bundle and an output end of the second heat exchange tube bundle,
the second tubes are in fluid communication with an output of the first heat exchange tube bundle and an input of the second heat exchange tube bundle,
the circulation pump is located in the first pipeline or the second pipeline.
7. The hydrothermal media heat exchanger of claim 6, wherein the heat exchange circulation member further comprises a bypass conduit, the bypass conduit communicating the first conduit and the second conduit.
8. The hydrothermal media heat exchanger of claim 4,
the media heat exchanger further comprises a first shell, the first heat exchanger tube bundle and the media passages being within the first shell;
the flue gas heat exchanger also includes a second shell, the second heat exchange tube bundle, the flue and the header box being within the second shell.
9. The hydrothermal media heat exchanger of claim 1, wherein the first heat exchange tube bundle and the second heat exchange tube bundle are of the type of a helical finned tube, a finned tube or an H-type finned tube; and/or the like and/or,
the first heat exchange tube bundle and the second heat exchange tube bundle are made of low-carbon steel, ND steel or stainless steel.
10. The hydrothermal media heat exchanger of claim 8,
the first shell and the second shell are of cuboid frame structures,
the side surface of the cuboid frame structure is provided with a shell wall,
the top surface and the bottom surface of the cuboid frame structure are provided with openings so as to facilitate the passing of smoke or media.
11. The hydrothermal media heat exchanger of claim 1, wherein the first and second heat exchange tube bundles are configured as channel-supported independent tube bank structures, the first and second heat exchange tube bundles being arranged in a horizontal or vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921011267.5U CN210741179U (en) | 2019-06-28 | 2019-06-28 | Water heat medium heat exchanger without low-temperature corrosion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921011267.5U CN210741179U (en) | 2019-06-28 | 2019-06-28 | Water heat medium heat exchanger without low-temperature corrosion |
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| Publication Number | Publication Date |
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| CN210741179U true CN210741179U (en) | 2020-06-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116202102A (en) * | 2023-05-06 | 2023-06-02 | 厦门铭光能源科技有限公司 | Special hot corrugated plate type air preheater for power station |
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2019
- 2019-06-28 CN CN201921011267.5U patent/CN210741179U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116202102A (en) * | 2023-05-06 | 2023-06-02 | 厦门铭光能源科技有限公司 | Special hot corrugated plate type air preheater for power station |
| CN116202102B (en) * | 2023-05-06 | 2023-08-08 | 厦门铭光能源科技有限公司 | Special hot corrugated plate type air preheater for power station |
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Address after: 201108 2nd Floor, No. 3111 Huaning Road, Minhang District, Shanghai Patentee after: SHANGHAI QIYAO THERMAL ENERGY ENGINEERING Co.,Ltd. Patentee after: The 711 Research Institute of China Shipbuilding Corp. Address before: 201108 2nd Floor, No. 3111 Huaning Road, Minhang District, Shanghai Patentee before: SHANGHAI QIYAO THERMAL ENERGY ENGINEERING Co.,Ltd. Patentee before: Shanghai Marine Diesel Engine Research Institute |