CN216844742U - Flue gas refrigerant heat exchanger - Google Patents

Abstract

The utility model provides a flue gas refrigerant heat exchanger has such characteristic, include: the first shell is a cuboid closed shell and is provided with a flue gas inlet; and a flue gas refrigerant heat exchange unit, set up in the first casing, including the fin coil pipe subassembly, the second casing, have exhanst smoke pipe and the water tray of exhanst smoke outlet, the fin coil pipe subassembly is settled on the water tray and is wrapped up by the second casing, at least, including the knockout subassembly, the gas collecting tube subassembly, plural heat-transfer pipe and a plurality of baffling board, a plurality of baffling board all overlap establish on the heat-transfer pipe and with the flue gas circulation space separation in the heat-transfer pipe outside become the flue gas passageway of the many processes that link up, flue gas gets into flue gas refrigerant heat exchange unit from the flue gas entry, and snakelike flow in the flue gas passageway, after the refrigerant in the heat transfer pipe is given to the heat transfer in the flue gas, flow from the flue gas outlet.

Description

Flue gas refrigerant heat exchanger

Technical Field

The utility model relates to a heat exchanger, concretely relates to flue gas refrigerant heat exchanger.

Background

Currently, with the continuous progress of the engine-driven heat pump technology, the engine-driven heat pump has been widely applied in the heating field. Most of engine-driven heat pump units popular in the market are small multi-split air-conditioning and cold and hot water units developed by companies such as Japan Mars, Sanyo and the like, and in the operation process of the units, smoke generated by an engine is usually discharged after only absorbing high-grade heat, and low-grade heat including water vapor condensation latent heat in the smoke is not utilized. Therefore, the engine-driven heat pump unit in the prior art has low operation efficiency. With the promotion of the policy of changing heat supply coal into gas in winter in the north and replacing a boiler by a heat pump in the process heating engineering, how to improve the heat supply operation efficiency of an engine-driven heat pump unit becomes a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve the thermal utilization problem in the flue gas that above-mentioned engine during operation produced and go on, aim at provides a flue gas refrigerant heat exchanger.

The utility model provides a flue gas refrigerant heat exchanger for give the refrigerant with the heat exchange of engine exhaust flue gas, have such characteristic, include: the first shell is a cuboid closed shell and is provided with a flue gas inlet; and a flue gas refrigerant heat exchange unit arranged in the first shell, comprising a fin coil assembly, a second shell, a smoke 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, and at least comprising a liquid separator assembly, a gas collecting pipe assembly, a plurality of heat transfer pipes and a plurality of baffle plates, two ends of the heat transfer pipes are respectively communicated with the liquid separator assembly and the gas collecting pipe assembly, the refrigerant after being shunted by the liquid separator assembly enters each heat transfer pipe and flows out after being converged by the gas collecting pipe assembly, wherein, the plurality of baffle plates are sleeved on the heat transfer pipe and divide the smoke circulation space outside the heat transfer pipe into a through multi-flow smoke channel, the smoke enters the smoke refrigerant heat exchange unit from the smoke inlet, and the refrigerant flows in a snake shape in the smoke channel, transfers the heat in the smoke to the refrigerant in the heat transfer pipe, and then flows out from the smoke outlet.

The utility model provides an among the flue gas refrigerant heat exchanger, can also have such characteristic: the heat transfer pipes are arranged side by side along a first horizontal direction, the baffle plates are arranged side by side along a second horizontal direction, and the first horizontal direction is vertical to the second horizontal direction.

The utility model provides an among the flue gas refrigerant heat exchanger, can also have such characteristic: wherein, the second casing includes the second apron at least, and this second apron sets up at finned coil assembly's top, and a plurality of baffling boards include last baffling board and lower baffling board, go up the baffling board connect on the second apron and with the water tray between form the first interval that supplies the flue gas to flow through, lower baffling board laminating is settled on the water tray and with the second apron between form the second interval that supplies the flue gas to flow through.

The utility model provides an among the flue gas refrigerant heat exchanger, can also have such characteristic: wherein, a plurality of baffling boards set up according to the mode that upper baffling board and lower baffling board were arranged in proper order.

The utility model provides an among the flue gas refrigerant heat exchanger, can also have such characteristic: wherein, the bottom of the lower baffle plate is provided with a through hole, a condensed water pipe is also arranged in the first shell, the condensed water pipe is connected with the water tray, and the upper part of the condensed water pipe is 10mm to 50mm higher than the bottom of the water tray.

The utility model provides an among the flue gas refrigerant heat exchanger, can also have such characteristic: wherein, the overflow mouth has been seted up to first casing side, and first casing is inside to be equipped with the neutralization ball, and the condensate water that flows out from the water tray passes through the condensate pipe and gets into in the first casing, flows through the overflow mouth behind the neutralization ball and flows out.

The utility model provides an among the flue gas refrigerant heat exchanger, can also have such characteristic: wherein, the position of the overflow port is higher than the bottom of the condensate pipe.

The utility model provides an among the flue gas refrigerant heat exchanger, can also have such characteristic: the liquid separator assembly comprises a refrigerant inlet pipe and a liquid separation head, the refrigerant inlet pipe comprises a section of vertical pipe connected with the liquid separation head, the length of the vertical pipe is not less than 8 times of the pipe diameter of the vertical pipe, and refrigerant flows into the liquid separation head from bottom to top in the vertical pipe.

The utility model provides an among the flue gas refrigerant heat exchanger, can also have such characteristic: wherein, the flue gas inlet and the flue gas outlet are both arranged at the top of the first shell.

The utility model provides an among the flue gas refrigerant heat exchanger, can also have such characteristic: wherein, the contact part of the flue gas refrigerant heat exchanger and the flue gas is made of stainless steel.

Action and effect of the utility model

According to the utility model relates to a flue gas refrigerant heat exchanger, because including flue gas refrigerant heat transfer unit, this flue gas refrigerant heat transfer unit includes fin coil pipe subassembly, second casing and water tray, and fin coil pipe subassembly sets up on the water tray and wraps up by the second casing to constitute basic confined flue gas circulation space, make the flue gas can not spill basically at flue gas refrigerant heat transfer unit, guaranteed flue gas heat transfer effect. In addition, because flue gas refrigerant heat transfer unit is from taking knockout subassembly and collector subassembly, it is very convenient to refrigerant side leak hunting pressure testing.

In addition, because the whole smoke refrigerant heat exchange unit is arranged in the first shell, the smoke refrigerant heat exchange unit can be expanded by adopting a fin coil, the fin coil assembly and the second shell are arranged on a water disc, and smoke in the smoke refrigerant heat exchange unit is basically prevented from leaking through a water seal. Even if the flue gas passes through the flue gas refrigerant heat exchange unit and has micro leakage such as a fin coil assembly and the like, the leaked flue gas is completely sealed in the first shell, so that no flue gas leaks out of the flue gas refrigerant heat exchanger.

In addition, because fin coil subassembly still includes plural root heat-transfer pipe and a plurality of baffling boards, a plurality of baffling boards are all established on the heat-transfer pipe and become the flue gas passageway of the many processes that link up with the flue gas circulation space in the heat-transfer pipe outside, and the flue gas snakelike flow in flue gas passageway has improved the velocity of flow that the flue gas passes through fin coil subassembly, has strengthened flue gas side heat transfer coefficient to realize that the volume of flue gas refrigerant heat exchanger reduces, cost reduction.

In addition, the lower space formed by the water disc and the first shell is used for treating condensed water generated by the flue gas refrigerant heat exchanger, so that clean and environment-friendly discharge of the condensed water is realized.

To sum up, the utility model discloses a two shell structure of flue gas refrigerant heat exchanger reasonable no flue gas leaks, multi-flow flue gas passageway heat transfer is effectual, small technology is convenient with low costs, the feature of environmental protection is good.

Drawings

Fig. 1 is a schematic structural diagram of a flue gas refrigerant heat exchanger in an embodiment of the present invention;

fig. 2 is an exploded schematic view of the flue gas refrigerant heat exchanger according to the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a flue gas refrigerant heat exchange unit in an embodiment of the present invention;

fig. 4 is an exploded view of the heat exchange unit of the flue gas refrigerant in the embodiment of the present invention;

FIG. 5 is a schematic sectional view of the structure of the flue gas refrigerant heat exchanger in the embodiment of the present invention;

FIG. 6 is a schematic diagram of a side view cross section of a flue gas refrigerant heat exchanger according to an embodiment of the present invention;

FIG. 7 is a schematic view of an embodiment of the present invention illustrating baffles;

fig. 8 is a schematic view of the connection between the flue gas refrigerant heat exchanger and the flue gas cooling water heat exchanger in the embodiment of the present invention.

Description of the figures: 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 pipe 52, the flue gas outlet pipe 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 overflow 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 gas collecting pipe assembly 78, the liquid distributor assembly 79, the neutralization ball 80, the service cover plate 81, the condensate pipe 83, the lower baffle plate 84, the upper baffle plate 85, the flue gas cooling water heat exchanger 86, the condensate pipe 87, the refrigerant inlet pipe 91, the liquid distributor 92, the liquid distributor pipe 93, the through-flow hole 94, the service port 95, the refrigerant outlet pipe 96, the liquid distributor pipe 83, the first rear side plate 83, the first rear plate 69, the second rear plate 70, the second rear plate, the liquid distributor plate 70, the liquid outlet pipe 83, and the liquid outlet pipe 83, the liquid outlet pipe 61, the liquid outlet pipe, the liquid outlet 61, and the liquid outlet 61, the liquid outlet pipe, the liquid outlet 61, the liquid outlet pipe, the liquid outlet 61, and the liquid outlet 61, and the liquid outlet 61, the liquid outlet pipe, the liquid outlet 61, the liquid outlet, Gas collecting branch pipe 97 and collecting pipe 98.

Detailed Description

In order to make the utility model realize that technical means, creation characteristics, achievement purpose and efficiency are easily understood and known, following embodiment combines the attached drawing to be right the utility model discloses flue gas refrigerant heat exchanger does specifically expounds.

Fig. 1 is the structural schematic diagram of the flue gas refrigerant heat exchanger in the embodiment of the present invention, and fig. 2 is the structural exploded schematic diagram of the flue gas refrigerant heat exchanger in the 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 casing 20 is a rectangular parallelepiped closed casing. The first casing 20 includes a first cover 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 has a flue gas inlet 60 therein, the flue gas inlet 60 being a rectangular hole. The first front side plate 68 is provided with a drain outlet 64 and an overflow port 65, and the position of the overflow port 65 is higher than the drain outlet 64 and lower than the flue gas refrigerant heat exchange unit 30.

Fig. 3 is the structural schematic diagram of the flue gas refrigerant heat exchange unit in the embodiment of the present invention, and fig. 4 is the structural decomposition schematic diagram of the flue gas refrigerant heat exchange unit in the embodiment of the present invention.

As shown in fig. 3 and 4, the flue gas refrigerant heat exchange unit 30 includes a finned coil assembly 74, a second housing 40, a smoke evacuation tube 53, a condensate tube 83, and a water pan 73. The fin coil assembly 74 rests on the water pan 73, being surrounded by the second housing 40. The second case 40 includes a second cover plate 75, a second front side plate 76, and a second rear side plate 77. The smoke exhaust pipe 53 is provided with a smoke outlet 61, the smoke exhaust pipe 53 is a round pipe, the smoke outlet 61 is a round pipe opening, the smoke exhaust pipe 53 is connected with a second cover plate 75, and the smoke exhaust pipe 53 is welded and sealed with a 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 main sectional view of a flue gas refrigerant heat exchanger structure in an embodiment of the present invention; fig. 6 is a schematic side view of a section of a flue gas refrigerant heat exchanger structure in an embodiment of the present 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 liquid separator 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 pipe 52 and are fixedly connected in an expanding manner. The heat transfer pipe 52 is connected to a plurality of refrigerant circuits by U-shaped pipes and U-bends. The heat transfer pipe 52 is provided in plural, and the plural heat transfer pipes 52 are arranged side by side in the first horizontal direction. In the present embodiment, the upper baffle 85 and the lower baffle 84 are fitted over all the heat transfer tubes 52.

A second cover plate 75 covers the upper baffle 85 and the upper part of the end plate 54 near the flue gas outlet 61. The second front plate 76 and the second rear plate 77 are respectively disposed in close contact with both side surfaces of the lower baffle plate 84, both side surfaces of the upper baffle plate 85, and both side surfaces of the fins 51, and are connected to both side surfaces of each of the 2 end plates 54 and the second cover plate 75. The bottom of the 2 end plates 54 and the lower baffle 84 are connected to a water tray 73. The second cover plate 75, the second front plate 76, the second rear plate 77, the end plate 54, the lower baffle plate 84, and the upper baffle plate 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 opening communicates with the flue gas inlet 60. The fin coil assembly 74, a second front side plate 76 and a second rear side plate 77 are disposed on the water tray 73. The second housing 40, the finned coil assembly 74 and the water pan 73 constitute a substantially closed flue gas flow space in which the 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 plurality of baffle plates are arranged side by side along a second horizontal direction, and the first horizontal direction is vertical 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 space for the flue gas to flow through with the water tray 73; the lower baffle 84 is closely arranged on the water tray 73 and forms a second interval for the smoke to flow through with the second cover plate 75. The first and second intervals 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 are 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 baffle 84 and the upper baffle 85 divide the finned coil assembly 74 from the fin 51 side into a through multi-pass flue gas channel so that flue gas entering the flue gas flow space flows in a serpentine shape in the flue gas channel.

The liquid separator assembly 79 includes a refrigerant inlet pipe 91, a liquid separation head 92 of a vertically arranged inverted cone structure, and a plurality of liquid separation pipes 93 connected above the liquid separation head 92. The liquid separator 93 is connected to each refrigerant circuit of the heat transfer pipe 52. The lower portion of the liquid separation head 92 is connected to a refrigerant inlet pipe 91, and the refrigerant inlet pipe 91 includes a vertical pipe connected to the liquid separation head 92 of the liquid separator assembly 79, and the length of the vertical pipe is not less than 8 times of the pipe diameter. The inlet of the refrigerant inlet pipe 91 is the refrigerant inlet port 62.

The header assembly 78 includes a refrigerant outlet tube 96, a plurality of flow manifolds 97, and a header tube 98. The plurality of flow merging pipes 97 are connected to the plurality of refrigerant circuits of the heat transfer pipe 52 and the header pipe 98, respectively. The header pipe 98 is also connected to the refrigerant outlet pipe 96. The outlet of the refrigerant outlet pipe 96 is the refrigerant outlet port 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 inlet port 62 and the refrigerant outlet port 63 are outside the first casing 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 pattern in the flue gas path, as indicated by the arrows in fig. 5, and exits the flue gas outlet 61 after transferring heat to the refrigerant in the heat transfer tubes 52 in the finned coil assembly 74. The refrigerant gas-liquid two-phase flow is divided from the refrigerant liquid inlet 62 through the liquid divider assembly 79 and enters each loop of the heat transfer pipe 52 in the fin coil assembly 74, heat is absorbed from the flue gas and evaporated, and the refrigerant gas or the refrigerant gas-liquid two-phase flow is converged and flows out of the refrigerant gas outlet 63 through the gas collecting pipe 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 part of the condensate pipe 73 is higher than the bottom of the water tray 73 by 10mm to 50 mm. After the flue gas is cooled by heat dissipation of the fin coil assembly 74 to the refrigerant in the heat transfer pipe 52, and reaches a saturated wet flue gas state, moisture in the flue gas condenses and separates out on the outer surfaces of the fins 51 and the heat transfer pipe 52 to form condensed water drops, and the condensed water drops grow and fall off on the outer surfaces of the fins 51 and the heat transfer pipe 52 and fall into the water tray 73.

Fig. 7 is a schematic view of a baffle plate in an embodiment of the present invention.

As shown in fig. 7, the bottom of the lower baffle 84 is notched to form a condensate flow hole 94 with the water tray 73. The condensed water in the water tray 73 passes through the through-hole 94 and flows through the upper portion of the condensed water pipe 83 into the lower space formed by the first housing 20 and the water tray 73. The height of the top of the condensate flow 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 a water seal is formed, and the water seal can prevent the smoke from passing through the condensed water through holes 94 between the smoke passages or leaking out to the lower space of the first housing 20 through the water tray 73.

An overflow port 65 is formed on the first front side plate 68 of the first casing 20, and a neutralizing ball 80 is installed in the lower space of the first casing 20. The overflow 65 is positioned above the bottom of the condensate pipe and below the water pan 73. A partition plate 72 is also provided in the first housing 20. The partition plate 72 is a rectangular plate and is vertically fixed at the bottom of the water tray 73 and positioned between the condensate pipe 83 and the overflow port 65. The bottom of the partition plate 72 and the bottom of the first casing 20 form a passage through which the condensed water flows. The bottom of the partition plate 72 is lower than the overflow port 6.

The nitrogen oxides contained in the flue gas are partially dissolved in the condensed water, and the condensed water flows into the lower space of the first casing 20 through the condensed water pipe 83. The partition plate 72 is provided to increase the contact time of the condensate with the neutralization balls, thereby allowing the condensate to react more sufficiently with the neutralization balls 80.

The first housing 20 is also provided with an access opening 95 and a waste discharge opening 64. The access opening 95 is rectangular and is provided in the first rear side plate 69 of the first casing 20. The access panel 81 is rectangular, and the size fits with the access opening 95, and can seal the access opening 95.

The upper portion of the partition plate 72 is provided with a square through hole (not shown in the figure), the sectional area of the square through hole is larger than that of the neutralization ball 80, and when an operator supplements the neutralization ball 80 from the access opening 95 into the first casing 20, if the neutralization ball 80 cannot be sent to the side of the partition plate 72 far away from the access opening 95, the operator can supplement the neutralization ball to the side of the partition plate 72 far away from the access opening 95 through the square through hole.

The drain outlet 64 is provided at a lower portion of the first front side plate 68 of the first casing 20, and is a pipe port communicating with the first casing 20 for draining the condensed water in the first casing 20.

The condensed water flowing out of the water tray 73 enters the first housing 20, and nitrogen oxides dissolved in the condensed water undergo a chemical neutralization reaction with the neutralization ball 80 to become neutral or weakly alkaline water containing no acidic substances and then flows out through the overflow port 65.

The neutralizing ball 80 is replaced at the access opening 95 by opening the access cover 81.

Fig. 8 is a schematic diagram of the connection between the flue gas refrigerant heat exchanger and the flue gas cooling water heat exchanger in the embodiment of the present 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 a rectangular parallelepiped. The high temperature flue gas first 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 overheating zone, and the flue gas does not generate condensed 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 from engine exhaust flue gas to a refrigerant, comprising:

the first shell is a cuboid closed shell and is provided with a flue gas inlet; and

a smoke refrigerant heat exchange unit arranged in the first shell and comprising a fin coil assembly, a second shell, a smoke exhaust pipe with a smoke outlet and a water tray,

the finned coil 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 pipe assembly, a plurality of heat transfer pipes and a plurality of baffle plates,

the two ends of the heat transfer pipe are respectively communicated with the liquid distributor component and the gas collecting pipe component, the refrigerant enters each heat transfer pipe after being shunted by the liquid distributor component and then flows out after being converged by the gas collecting pipe component,

wherein, the plurality of baffle plates are sleeved on the heat transfer pipe and divide the smoke circulation space outside the heat transfer pipe into a through multi-flow smoke channel,

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 then flows out from the flue gas outlet.

2. The flue gas refrigerant heat exchanger of claim 1, wherein:

wherein the plurality of heat transfer pipes are arranged side by side along a first horizontal direction,

a plurality of baffles are arranged side by side along a second horizontal direction,

the first horizontal direction is perpendicular to the second horizontal direction.

3. The flue gas refrigerant heat exchanger of claim 2, wherein:

wherein the second housing includes at least a second cover plate disposed atop the finned coil assembly,

the plurality of baffles comprise an upper baffle and a lower baffle,

the upper baffle plate is connected to the second cover plate and forms a first interval for the smoke to flow through with the water tray,

the lower baffle plate is arranged on the water tray in a fitting mode, and a second interval for the smoke to flow through is formed between the lower baffle plate and the second cover plate.

4. The flue gas refrigerant heat exchanger of claim 3, wherein:

the baffle plates are arranged in a mode that the upper baffle plate and the lower baffle plate are sequentially arranged.

5. The flue gas refrigerant heat exchanger of claim 3 wherein:

wherein the bottom of the lower baffle plate is provided with a through hole,

still be provided with the condenser pipe in the first casing, the condenser pipe with the water tray with be connected and condenser pipe upper portion than the water tray bottom is higher 10mm to 50 mm.

6. The flue gas refrigerant heat exchanger of claim 5, wherein:

wherein, the side surface of the first shell is provided with an overflow port,

the first shell is internally provided with a neutralization ball, 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 overflow port after flowing through the neutralization ball.

7. The flue gas refrigerant heat exchanger of claim 6, wherein:

wherein, the position of the overflow port is higher than the bottom of the condensed water pipe.

8. The flue gas refrigerant heat exchanger of claim 1, wherein:

wherein the liquid separator assembly comprises a refrigerant inlet pipe and a liquid separation head,

the refrigerant inlet pipe comprises a section of vertical pipe connected with the liquid separation 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 separation head from bottom to top in the vertical pipe.

9. The flue gas refrigerant heat exchanger of claim 1 wherein:

wherein the flue gas inlet and the flue gas outlet are both arranged at the top of the first shell.

10. The flue gas refrigerant heat exchanger of claim 1, wherein:

wherein, the contact part of the flue gas refrigerant heat exchanger and the flue gas is made of stainless steel.

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