CN114183768B - Flue gas refrigerant heat exchanger - Google Patents
Flue gas refrigerant heat exchanger Download PDFInfo
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- CN114183768B CN114183768B CN202111560771.2A CN202111560771A CN114183768B CN 114183768 B CN114183768 B CN 114183768B CN 202111560771 A CN202111560771 A CN 202111560771A CN 114183768 B CN114183768 B CN 114183768B
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- flue gas
- heat exchanger
- pipe
- refrigerant heat
- shell
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
- F28D7/085—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration in the form of parallel conduits coupled by bent portions
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a flue gas refrigerant heat exchanger, which has the following characteristics that: the first shell is a cuboid closed shell and is provided with a smoke inlet; the flue gas refrigerant heat exchange unit is arranged in the first shell, comprises a fin coil assembly, a second shell, a flue gas exhaust pipe with a flue gas outlet and a water tray, wherein the fin coil assembly is arranged on the water tray and is wrapped by the second shell, the fin coil assembly at least comprises a liquid distributor assembly, a gas collecting pipe assembly, a plurality of heat transfer pipes and a plurality of baffle plates, the baffle plates are sleeved on the heat transfer pipes and divide a flue gas circulation space outside the heat transfer pipes into a plurality of through flue gas channels, flue gas enters the flue gas refrigerant heat exchange unit from a flue gas inlet and flows in a serpentine manner in the flue gas channels, and heat in the flue gas is transferred to the refrigerant in the heat transfer pipes and then flows out from the flue gas outlet.
Description
Technical Field
The invention relates to a heat exchanger, in particular to a flue gas refrigerant heat exchanger.
Background
Currently, with the continuous progress of the technology of engine-driven heat pumps, engine-driven heat pumps have been widely used in the heating field. Most of engine-driven heat pump units popular in the market are small multi-split air-conditioning and hot-water cooling units developed by Japanese ocean horses, sanyang and other companies, and in the running process of the units, the smoke generated by the engine usually only absorbs high-grade heat and is discharged, and low-grade heat including the condensation latent heat of water vapor in the smoke is not utilized. Therefore, the engine-driven heat pump unit in the prior art has lower operation efficiency. Along with the promotion of the heat pump replacement boiler policy in the northern winter heating coal gas conversion and process heating engineering, how to improve the heating operation efficiency of the engine-driven heat pump unit becomes a problem to be solved urgently.
Disclosure of Invention
The present invention has been made to solve the problem of heat utilization in the flue gas generated when the engine is operated, and an object of the present invention is to provide a flue gas refrigerant heat exchanger.
The present invention provides a flue gas refrigerant heat exchanger for exchanging heat of flue gas exhausted from an engine to a refrigerant, having such a feature that it comprises: the first shell is a cuboid closed shell and is provided with a smoke inlet; the flue gas refrigerant heat exchange unit is arranged in the first shell, comprises a fin coil assembly, a second shell, a flue gas exhaust pipe with a flue gas outlet and a water tray, wherein the fin coil assembly is arranged on the water tray and is wrapped by the second shell, the flue gas refrigerant heat exchange unit at least comprises a liquid separator assembly, a gas collecting pipe assembly, a plurality of heat transfer pipes and a plurality of baffle plates, two ends of each heat transfer pipe are respectively communicated with the liquid separator assembly and the gas collecting pipe assembly, the refrigerant is shunted from the liquid separator assembly and flows out after entering each heat transfer pipe and is converged from the gas collecting pipe assembly, the baffle plates are sleeved on the heat transfer pipes and divide a flue gas circulation space outside the heat transfer pipes into a plurality of through flue gas channels, and the flue gas enters the flue gas refrigerant heat exchange unit from a flue gas inlet and flows in a snake shape in the flue gas channels, and flows out from the flue gas outlet after heat in the flue gas is transferred to the refrigerant in the heat transfer pipes.
In the flue gas refrigerant heat exchanger provided by the invention, the flue gas refrigerant heat exchanger can also have the following characteristics: the heat transfer pipes are arranged side by side along the first horizontal direction, the baffle plates are arranged side by side along the second horizontal direction, and the first horizontal direction is perpendicular to the second horizontal direction.
In the flue gas refrigerant heat exchanger provided by the invention, the flue gas refrigerant heat exchanger can also have the following characteristics: the second shell at least comprises a second cover plate, the second cover plate is arranged at the top of the fin coil assembly, the plurality of baffle plates comprise an upper baffle plate and a lower baffle plate, the upper baffle plate is connected to the second cover plate and forms a first interval for flue gas to flow through with the water tray, and the lower baffle plate is attached to the water tray and forms a second interval for flue gas to flow through with the second cover plate.
In the flue gas refrigerant heat exchanger provided by the invention, the flue gas refrigerant heat exchanger can also have the following characteristics: wherein, a plurality of baffles are arranged according to the mode that upper baffle and lower baffle are arranged in proper order.
In the flue gas refrigerant heat exchanger provided by the invention, the flue gas refrigerant heat exchanger can also have the following characteristics: wherein, the through-flow hole has been seted up to the bottom of lower baffling board, still is provided with the condensate pipe in the first casing, and the condensate pipe is connected with the water tray and condensate pipe upper portion than water tray bottom 10mm to 50mm.
In the flue gas refrigerant heat exchanger provided by the invention, the flue gas refrigerant heat exchanger can also have the following characteristics: wherein, the overflow mouth has been seted up to first casing side, and the inside neutralization ball that is equipped with of first casing, and the condensate water that flows from the water tray gets into in the first casing through the condensate pipe, flows through the overflow mouth after the neutralization ball and flows.
In the flue gas refrigerant heat exchanger provided by the invention, the flue gas refrigerant heat exchanger can also have the following characteristics: wherein, the overflow port is higher than the bottom of the condensate pipe.
In the flue gas refrigerant heat exchanger provided by the invention, the flue gas refrigerant heat exchanger can also have the following characteristics: the liquid separator assembly comprises a refrigerant inlet pipe and a liquid separating head, wherein the refrigerant inlet pipe comprises a section of vertical pipe connected with the liquid separating head, the length of the vertical pipe is not less than 8 times of the pipe diameter of the vertical pipe, and the refrigerant flows in the vertical pipe from bottom to top and enters the liquid separating head.
In the flue gas refrigerant heat exchanger provided by the invention, the flue gas refrigerant heat exchanger can also have the following characteristics: wherein, flue gas entry and flue gas export all set up at the top of first casing.
In the flue gas refrigerant heat exchanger provided by the invention, the flue gas refrigerant heat exchanger can also have the following characteristics: wherein, the material of the contact part of the flue gas refrigerant heat exchanger and the flue gas is stainless steel.
Effects and effects of the invention
According to the flue gas refrigerant heat exchanger, the flue gas refrigerant heat exchange unit comprises the fin coil assembly, the second shell and the water disc, and the fin coil assembly is arranged on the water disc and is wrapped by the second shell, so that a basically closed flue gas circulation space is formed, flue gas cannot leak out of the flue gas refrigerant heat exchange unit basically, and the flue gas heat exchange effect is guaranteed. In addition, because the flue gas refrigerant heat exchange unit is provided with the liquid distributor component and the gas collecting pipe component, the leakage detection and the pressure test of the refrigerant side are very convenient.
In addition, because the flue gas refrigerant heat exchange unit is integrally arranged in the first shell, the flue gas refrigerant heat exchange unit can be connected by expansion of the fin coil, the fin coil assembly and the second shell are arranged on the water tray, and the flue gas in the flue gas refrigerant heat exchange unit is basically not leaked outside through water seal. Even if the smoke passes through the smoke refrigerant heat exchange unit and has micro leakage such as a fin coil assembly and the like, the leaked smoke is totally enclosed in the first shell, so that no smoke leaks out of the smoke refrigerant heat exchanger.
In addition, because the fin coil pipe assembly also comprises a plurality of heat transfer pipes and a plurality of baffle plates, the baffle plates are sleeved on the heat transfer pipes and divide the flue gas circulation space outside the heat transfer pipes into a plurality of through flue gas channels, flue gas flows in a serpentine manner in the flue gas channels, the flow rate of the flue gas passing through the fin coil pipe assembly is improved, the heat exchange coefficient of the flue gas side is enhanced, and therefore the size reduction and the cost reduction of the flue gas refrigerant heat exchanger are realized.
In addition, the lower space formed by the water tray and the first shell is used for treating condensation water generated by the flue gas refrigerant heat exchanger, so that the clean and environment-friendly discharge of the condensation water is realized.
In conclusion, the double-shell structure of the flue gas refrigerant heat exchanger has the advantages of reasonable structure, no leakage of flue gas, good heat exchange effect of the multi-flow flue gas channel, small volume, convenient process, low cost and good environmental protection performance.
Drawings
FIG. 1 is a schematic diagram of a flue gas refrigerant heat exchanger in an embodiment of the invention;
FIG. 2 is a schematic exploded view of a flue gas refrigerant heat exchanger in accordance with an embodiment of the invention;
FIG. 3 is a schematic diagram of a flue gas refrigerant heat exchange unit in an embodiment of the invention;
FIG. 4 is an exploded schematic view of a flue gas refrigerant heat exchange unit in an embodiment of the invention;
FIG. 5 is a schematic diagram of a main cross section of a flue gas refrigerant heat exchanger in an embodiment of the invention;
FIG. 6 is a schematic side cross-sectional view of a flue gas refrigerant heat exchanger in an embodiment of the invention;
FIG. 7 is a schematic view of a baffle in an embodiment of the present invention;
Fig. 8 is a schematic diagram of a flue gas refrigerant heat exchanger connected to a flue gas cooling water heat exchanger in an embodiment of the invention.
Description of the drawings: the flue gas refrigerant heat exchanger 17, the first housing 20, the flue gas refrigerant heat exchange unit 30, the second housing 40, the fins 51, the heat transfer tubes 52, the flue gas outlet tube 53, the end plate 54, the flue gas inlet 60, the flue gas outlet 61, the refrigerant liquid inlet 62, the refrigerant gas outlet 63, the drain 64, the spillway 65, the first cover plate 66, the first right side plate 67, the first front side plate 68, the first rear side plate 69, the first support plate 70, the second support plate 71, the partition plate 72, the water tray 73, the fin coil assembly 74, the second cover plate 75, the second front side plate 76, the second rear side plate 77, the header assembly 78, the knockout assembly 79, the neutralizing balls 80, the service cover plate 81, the condensate pipe 83, the lower baffle 84, the upper baffle 85, the flue gas cooling water heat exchanger 86, the condensate pipe 87, the refrigerant inlet tube 91, the liquid distributor 92, the liquid distributor pipe 93, the liquid flow through holes 94, the service ports 95, the refrigerant outlet tube 96, the gas collecting branch 97, the header 98.
Detailed Description
In order to make the technical means, creation features, achievement of the purposes and effects of the present invention easy to understand, the following embodiments specifically describe the flue gas refrigerant heat exchanger of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a flue gas refrigerant heat exchanger according to an embodiment of the present invention, and fig. 2 is an exploded schematic diagram of a flue gas refrigerant heat exchanger according to an embodiment of the present invention.
As shown in fig. 1 and 2, the present embodiment provides a flue gas refrigerant heat exchanger 17 including a first housing 20, a flue gas refrigerant heat exchange unit 30, a first support plate 70, a second support plate 71, and a partition plate 72.
The first housing 20 is a rectangular parallelepiped closed housing. The first housing 20 includes a first cover plate 66, a first right side plate 67, a first front side plate 68, and a first rear side plate 69. The first cover plate 66 is provided with a smoke inlet 60, and the smoke inlet 60 is a rectangular hole. The first front side plate 68 is provided with a drain outlet 64 and an overflow outlet 65, and the overflow outlet 65 is higher than the drain outlet 64 and lower than the flue gas refrigerant heat exchange unit 30.
Fig. 3 is a schematic diagram of a flue gas refrigerant heat exchange unit in an embodiment of the invention, and fig. 4 is an exploded schematic diagram of the flue gas refrigerant heat exchange unit in an embodiment of the invention.
As shown in fig. 3 and 4, the flue gas refrigerant heat exchange unit 30 includes a fin coil assembly 74, a second housing 40, a flue gas duct 53, a condensate pipe 83, and a water tray 73. The finned coil assembly 74 is mounted on the water tray 73 and is wrapped by the second housing 40. The second housing 40 includes a second cover plate 75, a second front side plate 76, and a second rear side plate 77. The smoke discharging pipe 53 is provided with a smoke outlet 61, the smoke discharging pipe 53 is a circular pipe, the smoke outlet 61 is a circular pipe orifice, the smoke discharging pipe 53 is connected with the second cover plate 75, and the smoke discharging pipe 53 is welded and sealed with the first cover plate 66. The flue gas outlet 61 is located outside the first cover plate 66. The flue gas inlet 60 and the flue gas outlet 86 are both at the top of the first housing 20.
The first and second support plates 70 and 71 are connected to the lower portion of the water tray 73 to support the flue gas refrigerant heat exchange unit 30, and are disposed in the first housing 20.
FIG. 5 is a schematic diagram of a main cross section of a flue gas refrigerant heat exchanger in an embodiment of the invention; fig. 6 is a schematic side cross-sectional view of a flue gas refrigerant heat exchanger structure in an embodiment of the invention.
As shown in fig. 3-6, the finned coil assembly 74 includes 2 end plates 54, a lower baffle 84, an upper baffle 85, fins 51, heat transfer tubes 52, a distributor assembly 79, and a header assembly 78. The 2 end plates 54, the lower baffle plate 84, the upper baffle plate 85 and the fins 51 are sleeved on the heat transfer tubes 52 and are connected and fixed in an expanding manner. The heat transfer pipe 52 is connected to a plurality of refrigerant circuits by U-shaped pipes and U-shaped bends. The heat transfer tubes 52 are provided in plurality, and the plurality of heat transfer tubes 52 are arranged side by side in the first horizontal direction. In this embodiment, the upper baffle 85 and the lower baffle 84 are all nested on all of the heat transfer tubes 52.
The second cover plate 75 covers the upper baffle 85 and the upper portion of the end plate 54 adjacent to the flue gas outlet 61. The second front side plate 76 and the second rear side plate 77 are respectively disposed closely to both sides of the lower baffle 84, both sides of the upper baffle 85, and both sides of the fin 51, and are connected to both sides of the 2 end plates 54 and the second cover plate 75, respectively. The bottom of the 2 end plates 54 and the lower baffle 84 are connected to the water tray 73. The second cover plate 75, the second front side plate 76, the second rear side plate 77, the end plate 54, the lower baffle 84, and the upper baffle 85 are connected by riveting, screwing, or welding.
The second housing 40 and the end plate 54 remote from the flue gas outlet 61 also form an opening for the entry of flue gas, which communicates with the flue gas inlet 60. The finned coil assembly 74, the second front side plate 76 and the second rear side plate 77 are disposed on the water tray 73. The second housing 40, the finned coil assembly 74 and the water tray 73 form a substantially closed flue gas flow space in which flue gas flows to exchange heat with the refrigerant in the heat transfer tubes 52.
The lower baffle 84 and the upper baffle 85 are collectively referred to as baffles. The baffle plates are arranged side by side along the second horizontal direction, and the first horizontal direction is perpendicular to the second horizontal direction.
As shown in fig. 5 and 6, the upper baffle 85 is connected to the second cover plate 75 and forms a first interval with the water tray 73 for the flue gas to flow through; the lower baffle 84 is snugly disposed over the water tray 73 and forms a second space with the second cover plate 75 for the flow of flue gas therethrough. The first interval and the second interval may be the same or different in size. The first interval is equal to or less than the distance between the heat transfer pipe 52 and the water tray 73. The second interval is equal to or less than the distance between the heat transfer pipe 52 and the second cover plate 75.
The plurality of baffles is arranged with an even number of lower baffles 84 and an odd number of upper baffles 85 in such a manner that 1 upper baffle 85 and 1 lower baffle 84 are arranged at intervals from near the flue gas outlet 61. In this embodiment, a total of 3 upper baffles 85 and 2 lower baffles 84 are provided. The lower and upper baffles 84, 85 separate the finned coil assembly 74 from the side of the fins 51 into a plurality of flow flue gas passages therethrough such that flue gas entering the flue gas flow space flows in a serpentine fashion in the flue gas passages.
The knockout assembly 79 includes a refrigerant inlet tube 91, a vertically disposed, inverted cone structured knockout head 92, and a plurality of knockout tubes 93 connected above the knockout head 92. The liquid separation pipe 93 is connected to each refrigerant circuit of the heat transfer pipe 52. The lower portion of the tap 92 is connected to a refrigerant inlet pipe 91, and the refrigerant inlet pipe 91 includes a length of a vertical pipe connected to the tap 92 in the tap assembly 79, which is not less than 8 times the pipe diameter. The inlet of the refrigerant inlet pipe 91 is the refrigerant liquid inlet 62.
Header assembly 78 includes a refrigerant outlet tube 96, a plurality of manifold tubes 97, and a header tube 98. The plurality of merging pipes 97 are connected to the plurality of refrigerant circuits of the heat transfer pipe 52 and to the header pipe 98, respectively. Header 98 is also connected to refrigerant outlet tube 96. The outlet of the refrigerant outlet pipe 96 is the refrigerant outlet 63.
The refrigerant inlet pipe 91 is welded to the first right side plate 67, and the refrigerant outlet pipe 96 is welded to the first right side plate 67 such that the refrigerant liquid inlet 62 and the refrigerant gas outlet 63 are outside the first housing 20.
The flue gas enters the flue gas refrigerant heat exchange unit 30 in the first housing 20 from the flue gas inlet 60 and flows in a serpentine fashion in the flue gas channel as shown by the arrows in fig. 5, and after the flue gas transfers heat to the refrigerant in the heat transfer tubes 52 in the fin coil assembly 74, it exits from the flue gas outlet 61. The refrigerant gas-liquid two-phase flow is split from the refrigerant liquid inlet 62 through the splitter assembly 79 and enters each loop of the heat transfer tubes 52 in the fin coil assembly 74 to absorb heat from the flue gas and evaporate, and the refrigerant gas or refrigerant gas-liquid two-phase flow is converged and flows out of the refrigerant gas outlet 63 through the gas collector assembly 78.
In this embodiment, all the components in the flue gas heat exchanger 17 are in contact with the flue gas, and the flue gas heat exchanger 17 is made of stainless steel.
A condensate pipe 83 is also provided in the first housing 20. The water tray 73 is connected to a condensate pipe 83. The upper portion of the condensation duct 73 is 10mm to 50mm higher than the bottom of the water tray 73. After the flue gas is cooled by radiating heat to the refrigerant in the heat transfer tube 52 through the fin coil assembly 74 and reaches a saturated wet flue gas state, water in the flue gas is condensed and separated out on the outer surfaces of the fins 51 and the heat transfer tube 52 to form condensed water drops, and the condensed water drops grow up and fall off on the outer surfaces of the fins 51 and the heat transfer tube 52 and fall into the water tray 73.
FIG. 7 is a schematic view of a baffle in an embodiment of the present invention.
In addition, as shown in fig. 7, a notch is formed at the bottom of the lower baffle 84, and forms a condensate flow hole 94 with the water tray 73. The condensed water in the water tray 73 flows through the through-hole 94 and then flows into the lower space formed by the first housing 20 and the water tray 73 through the upper portion of the condensed water pipe 83. The top of the condensate through-hole 94 is lower than the top of the condensate pipe 83.
The condensed water is collected in the water tray 73 to form a water level of 10mm to 50mm and forms a water seal, which can prevent smoke from being strung between the respective smoke passages through the condensed water through-holes 94 or leaking into the lower space of the first housing 20 through the water tray 73.
The first front side plate 68 of the first housing 20 is provided with an overflow port 65, and a neutralization ball 80 is installed in the lower space of the first housing 20. The overflow 65 is positioned above the bottom of the condensate line and below the water tray 73. A partition plate 72 is also provided in the first housing 20. The partition plate 72 is a rectangular plate vertically fixed to the bottom of the water tray 73 between the condensate pipe 83 and the overflow port 65. The bottom of the partition plate 72 and the bottom of the first housing 20 form a passage through which the condensed water flows. The bottom of the partition plate 72 is lower than the overflow 6.
Nitrogen oxides contained in the flue gas are partially dissolved in the condensate, and the condensate flows into the lower space of the first housing 20 through the condensate pipe 83. The provision of the partition plate 72 can increase the contact time of the condensed water with the neutralization balls, thereby making the condensed water react more sufficiently with the neutralization balls 80.
The first housing 20 is also provided with an access port 95 and a drain 64. The access opening 95 is rectangular and is provided in the first rear side plate 69 of the first housing 20. The access panel 81 is rectangular in shape and is sized to fit the access opening 95 and is capable of sealing the access opening 95.
The upper portion of the partition plate 72 is provided with a square through hole (not shown in the drawings), the cross-sectional area of which is larger than that of the neutralization ball 80, and when the neutralization ball 80 is replenished into the first housing 20 from the service hole 95 by the operator, if the neutralization ball 80 cannot be sent to the side of the partition plate 72 away from the service hole 95, the neutralization ball can be replenished to the side of the partition plate 72 away from the service hole 95 by the square through hole.
The drain 64 is disposed below the first front side plate 68 of the first housing 20, and is a nozzle communicating with the first housing 20, for draining the condensed water in the first housing 20.
The condensed water flowing out of the water tray 73 enters the first housing 20, and the nitrogen oxides dissolved in the condensed water undergo a chemical neutralization reaction with the neutralization balls 80, and then are changed into neutral or weakly alkaline water free from acidic substances, and then flow out through the overflow port 65.
The neutralization balls 80 are replaced in addition to the access port 95 by opening the access panel 81.
Fig. 8 is a schematic diagram of a flue gas refrigerant heat exchanger connected to a flue gas cooling water heat exchanger in an embodiment of the invention.
As shown in fig. 8, the flue gas refrigerant heat exchanger 17 and the flue gas cooling water heat exchanger 86 in the present embodiment are connected at the flue gas inlet 60, and the flue gas cooling water heat exchanger 86 is rectangular parallelepiped. The high temperature flue gas releases heat to the cooling water in the flue gas cooling water heat exchanger 86 and then enters the flue gas refrigerant heat exchanger 17 through the flue gas inlet 60. The flue gas entering the flue gas inlet 60 is in the superheating area, and the flue gas does not generate condensation water in the flue gas cooling water heat exchanger 86, so that the flue gas cooling water heat exchanger 17 can use materials with better heat transfer performance such as copper and the like, but poor nitric acid corrosion resistance effect.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (10)
1. A flue gas refrigerant heat exchanger for exchanging heat of flue gas exhausted from an engine to a refrigerant, comprising:
the first shell is a cuboid closed shell and is provided with a smoke inlet; and
The flue gas refrigerant heat exchange unit is arranged in the first shell and comprises a fin coil pipe assembly, a second shell, a flue gas discharging pipe with a flue gas outlet and a water disc,
The fin coil pipe assembly is arranged on the water tray and is wrapped by the second shell and at least comprises a liquid distributor assembly, a gas collecting tube assembly, a plurality of heat transfer tubes and a plurality of baffle plates,
The two ends of the heat transfer tube are respectively communicated with the liquid distributor assembly and the gas collecting tube assembly, the refrigerant is shunted from the liquid distributor assembly and then enters the heat transfer tubes to flow out after being converged from the gas collecting tube assembly,
Wherein a plurality of baffle plates are sleeved on the heat transfer pipe and divide the flue gas circulation space outside the heat transfer pipe into a plurality of through flue gas channels,
The flue gas enters the flue gas refrigerant heat exchange unit from the flue gas inlet, flows in a serpentine manner in the flue gas channel, transfers heat in the flue gas to the refrigerant in the heat transfer pipe, and flows out from the flue gas outlet.
2. A flue gas refrigerant heat exchanger according to claim 1, wherein:
wherein a plurality of heat transfer tubes are arranged side by side along a first horizontal direction,
A plurality of baffle plates are arranged side by side along the second horizontal direction,
The first horizontal direction is perpendicular to the second horizontal direction.
3. A flue gas refrigerant heat exchanger according to claim 2, wherein:
wherein the second housing includes at least a second cover plate disposed on top of the fin coil assembly,
The plurality of baffles comprises an upper baffle and a lower baffle,
The upper baffle plate is connected to the second cover plate and forms a first interval with the water tray for the flue gas to flow through,
The lower baffle plate is attached to the water tray and forms a second interval with the second cover plate for the flue gas to flow through.
4. A flue gas refrigerant heat exchanger according to claim 3, wherein:
Wherein, a plurality of baffle plates are arranged according to the mode that the upper baffle plates and the lower baffle plates are arranged in sequence.
5. A flue gas refrigerant heat exchanger according to claim 3, wherein:
wherein, the bottom of the lower baffle plate is provided with a through hole,
And a condensate pipe is further arranged in the first shell, the condensate pipe is connected with the water tray, and the upper part of the condensate pipe is 10mm to 50mm higher than the bottom of the water tray.
6. A flue gas refrigerant heat exchanger according to claim 5, wherein:
Wherein the side surface of the first shell is provided with an overflow port,
The neutralization ball is arranged in the first shell, the condensed water flowing out of the water tray enters a lower space formed by the first shell and the water tray through the condensed water pipe, and flows out of the water tray through the overflow port after flowing through the neutralization ball.
7. A flue gas refrigerant heat exchanger according to claim 6, wherein:
Wherein, the overflow port is higher than the bottom of the condensate pipe.
8. A flue gas refrigerant heat exchanger according to claim 1, wherein:
wherein the knockout assembly includes a refrigerant inlet tube and a knockout head,
The refrigerant inlet pipe comprises a section of vertical pipe connected with the liquid separating head, the length of the vertical pipe is not less than 8 times of the pipe diameter of the vertical pipe, and the refrigerant flows into the liquid separating head from bottom to top in the vertical pipe.
9. A flue gas refrigerant heat exchanger according to claim 1, wherein:
Wherein, the flue gas inlet and the flue gas outlet are both arranged at the top of the first shell.
10. A flue gas refrigerant heat exchanger according to claim 1, wherein:
Wherein, the material of the contact part of the flue gas refrigerant heat exchanger and the flue gas is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111560771.2A CN114183768B (en) | 2021-12-14 | 2021-12-14 | Flue gas refrigerant heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111560771.2A CN114183768B (en) | 2021-12-14 | 2021-12-14 | Flue gas refrigerant heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114183768A CN114183768A (en) | 2022-03-15 |
| CN114183768B true CN114183768B (en) | 2024-09-10 |
Family
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Family Applications (1)
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