Distributor for falling film evaporator

Abstract

The utility model relates to the technical field of falling film evaporators, in particular to a distributor for a falling film evaporator, which comprises a main body, a central pipe is arranged in the main body, a first liquid inlet pipe and a second liquid inlet pipe are arranged at the top of the main body, and one end of the first liquid inlet pipe extending into the main body is fixedly connected with a first liquid distributor. A second liquid distributor is fixedly connected to the end, away from the second liquid inlet pipe, of the first liquid distributor and located at the top of the central pipe, the central pipe is connected with the second liquid distributor through a first partition plate, and second partition plates are fixedly connected to the outer side of the central pipe and located at the two ends of the first partition plate; a gravity box is arranged at the end, away from the second liquid distributor, of the center pipe and located in the main body, a liquid outlet pipe is arranged at the end, away from the second partition plate, of the gravity box and located in the main body, and compared with an existing distributor of the falling film evaporator, the overall practicability of the distributor of the falling film evaporator can be improved through the design.

Description

TECHNICAL FIELD

[0001] The utility model relates to falling film evaporator technical field, concretely relates to a distributor for falling film evaporator. BACKGROUND

[0002] The working principle of falling film evaporator is: the refrigerant liquid condensed from condenser, through throttling device pressure reduction throttling expansion, forms gas-liquid two-phase refrigerant, under the drive of pressure, gas-liquid two-phase refrigerant enters the distributor arranged in the top of evaporator, through multistage distribution, finally refrigerant is left by the distribution hole located at the bottom of distributor, drops on the evaporator heat exchange pipe, refrigerant drops successively to the heat exchange pipe below by the action of gravity from top to bottom, thereby refrigerant evaporation occurs, heat is transferred to refrigerant from the medium in heat exchange pipe, thereby the effect of refrigeration is achieved.

[0003] In the above process, the most critical factor affecting the refrigeration effect is the uniform distribution of refrigerant, and the mechanism of the distributor determines the refrigerant distribution effect. Since the throttled refrigerant is in gas-liquid two-phase state, its flow state is very turbulent, and the gas cannot be effectively discharged. Simply relying on multistage distribution hole plate distribution cannot solve the problems of uneven distribution of refrigerant droplets, droplet splashing and droplet carrying leading to compressor liquid return. The structure of the distributor of the falling film evaporator determines the refrigerant distribution effect. Therefore, it is particularly important to improve the existing falling film evaporator distributor and design a new falling film evaporator distributor to solve the above technical defects and improve the practicability of the overall falling film evaporator distributor. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a kind of distributor for falling film evaporator, which can uniformly distribute refrigerant, stabilize its flow state and effectively discharge gas, thereby improving the overall safety of the distributor of falling film evaporator to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of distributor for falling film evaporator, comprising a main body, the inside of the main body is provided with a center tube, the top of the main body is provided with first liquid inlet pipe and second liquid inlet pipe, the first liquid inlet pipe is fixedly connected with first liquid distributor at one end inside the main body, the first liquid distributor is fixedly connected with second liquid distributor at the top of center tube away from second liquid inlet pipe, the center tube is connected with second liquid distributor by first partition, the outer side of the center tube and the both ends of first partition are fixedly connected with second partition, the end of the center tube away from second liquid distributor and located in the inside of main body is provided with gravity box, the end of gravity box away from second partition and located in the inside of main body is provided with liquid outlet pipe.

[0007] As the preferred scheme of the utility model, the first cloth liquid distributor and the second cloth liquid distributor are provided with a plurality of first liquid outlet holes with equal intervals at one end close to each other, and the first liquid outlet hole of the first cloth liquid distributor and the first liquid outlet hole of the second cloth liquid distributor are designed to be matched.

[0008] As the preferred scheme of the utility model, the end of the second cloth liquid distributor away from the first cloth liquid distributor is designed to be arc-shaped, and a plurality of second liquid outlet holes with equal intervals are arranged at the end of the second cloth liquid distributor away from the first cloth liquid distributor.

[0009] As the preferred scheme of the utility model, a plurality of first through holes with equal intervals are arranged at the outer side of the first partition plate, and a plurality of second through holes with equal intervals are arranged at the outer side of the second partition plate.

[0010] As the preferred scheme of the utility model, a plurality of liquid inlet holes with equal intervals are arranged at one end of the gravity box close to the first partition plate.

[0011] As the preferred scheme of the utility model, a first area is arranged at one side of the first partition plate and between the second cloth liquid distributor and the second partition plate, a second area is arranged at one end of the first partition plate away from the first area and between the second cloth liquid distributor and the second partition plate, and a third area is arranged between the second partition plate and the first gravity box.

[0012] As the preferred scheme of the utility model, a plurality of first heat exchange pipes with equal intervals are arranged in the first area and the second area, and a plurality of third heat exchange pipes with equal intervals are arranged in the third area.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1、In the utility model, through the design of the main body, the central pipe, the first partition plate, the first through hole, the second partition plate, the second through hole, the second cloth liquid distributor, the second liquid outlet hole, the first area, the first heat exchange pipe, the second area, the third area, the third heat exchange pipe, the liquid outlet pipe, the gravity box and the liquid inlet hole, the liquid mixed uniformly is evenly distributed in the first area and the second area by the arc surface of the second cloth liquid distributor through the second liquid outlet hole, and is dropped on a plurality of first heat exchange pipes for heat exchange and gasification, the first through hole guarantees the circulation between the first area and the second area, so that the liquid for heat exchange in the first area and the second area is the same, the second through hole screens the liquid, guarantees that the remaining liquid is evenly entered into the third area through the second through hole, and then is heat exchanged with the third heat exchange pipe, the liquid for heat exchange and gasification is drawn into the gravity box through the liquid inlet hole and then is discharged through the liquid outlet pipe, the flow state is stable, the gas is effectively discharged, and the division of the first area, the second area and the third area shortens the straight-line falling distance of the liquid, avoids the splashing of liquid drops, and guarantees the safety of the device.

[0015] 2、The utility model discloses a body, first liquid inlet pipe, second liquid inlet pipe, first liquid distributor, first liquid outlet hole, second liquid distributor and second liquid outlet hole are designed, liquid enters the first liquid distributor in the body interior from the first liquid inlet pipe and the second liquid inlet pipe, and the liquid is primarily mixed evenly in the first liquid distributor, and then liquid enters the second liquid distributor from the first liquid distributor through the first liquid outlet hole, and the liquid is mixed secondly in the second liquid distributor, and multiple mixing guarantees that liquid is mixed evenly, and guarantees that liquid is distributed evenly when exchanging heat. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is whole structure schematic diagram of the utility model;

[0017] Fig. 2 It is internal structure schematic diagram of the utility model;

[0018] Fig. 3 It is vertical section structure schematic diagram of the utility model.

[0019] In the drawing: 1, body;11, first liquid inlet pipe;12, second liquid inlet pipe;2, center tube;21, first baffle;22, first through -hole;23, second baffle;24, second through -hole;3, first liquid distributor;31, first liquid outlet hole;4, second liquid distributor;41, second liquid outlet hole;5, first area;51, first heat exchange pipe;6, second area;7, third area;71, third heat exchange pipe;8, liquid outlet pipe;9, gravity box;91, liquid inlet hole. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described below in a clear and complete manner in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0021] Embodiment:

[0022] Please refer to Figs. 1-3 The utility model provides a technical scheme:

[0023] The application discloses a distributor for falling film evaporator, which comprises a main body 1, the inside of the main body 1 is provided with a central tube 2, the top of the main body 1 is provided with a first liquid inlet pipe 11 and a second liquid inlet pipe 12, the first liquid inlet pipe 11 is fixedly connected with a first liquid distributor 3 at one end extending into the inside of the main body 1, the end of the first liquid distributor 3 away from the second liquid inlet pipe 12 is fixedly connected with a second liquid distributor 4 at the top of the central tube 2, the central tube 2 is connected with the second liquid distributor 4 through a first partition plate 21, the outside of the central tube 2 and the two ends of the first partition plate 21 are fixedly connected with a second partition plate 23, the end of the central tube 2 away from the second liquid distributor 4 and located in the inside of the main body 1 is provided with a gravity box 9, the end of the gravity box 9 away from the second partition plate 23 and located in the inside of the main body 1 is provided with a liquid outlet pipe 8, when the distributor is used, liquid enters the first liquid distributor 3 in the inside of the main body 1 from the first liquid inlet pipe 11 and the second liquid inlet pipe 12, the liquid is uniformly mixed in the first liquid distributor 3 and then enters the second liquid distributor 4, the liquid is mixed again in the second liquid distributor 4, so that the liquid is uniformly mixed, the uniformly mixed liquid enters the inside of a first area 5 and a second area 6, then enters the inside of a third area 7 through the second partition plate 23, and then slowly and uniformly enters the gravity box 9 after twice heat exchange, and finally is discharged from the liquid outlet pipe 8.

[0024] Further, the end of the first liquid distributor 3 and the second liquid distributor 4 close to each other is provided with a plurality of first liquid outlet holes 31 distributed at equal intervals, the first liquid outlet holes 31 of the first liquid distributor 3 and the first liquid outlet holes 31 of the second liquid distributor 4 are designed to be matched with each other, the two liquid distributors are designed to make the liquid fully mixed and uniform, and the first liquid outlet holes 31 make the liquid enter the second liquid distributor 4 from the first liquid distributor 3.

[0025] Wherein, the end of the second liquid distributor 4 away from the first liquid distributor 3 is designed to be arc-shaped, the end of the second liquid distributor 4 away from the first liquid distributor 3 is provided with a plurality of second liquid outlet holes 41 distributed at equal intervals, the arc-shaped surface of the second liquid distributor 4 makes the liquid uniformly distributed in the main body 1 when passing through the second liquid outlet holes 41, so that the liquid fully and uniformly exchanges heat.

[0026] Secondly, the outside of the first partition plate 21 is provided with a plurality of first through holes 22 distributed at equal intervals, the outside of the second partition plate 23 is provided with a plurality of second through holes 24 distributed at equal intervals, the first through holes 22 ensure the flow between the first area 5 and the second area 6, so that the liquid exchanged heat in the first area 5 and the second area 6 is the same, and the second through holes 24 make the liquid screened, so that the remaining liquid uniformly enters the third area 7 through the second through holes 24.

[0027] Further, the end of the gravity box 9 close to the first partition plate 21 is provided with a plurality of liquid inlet holes 91 distributed at equal intervals, the liquid gasified by heat exchange is drawn into the gravity box 9 through the liquid inlet holes 91 and then discharged through the liquid outlet pipe 8.

[0028] Further, the first partition 21 is provided with a first area 5 on one side between the second liquid distributor 4 and the second partition 23, and the first partition 21 is provided with a second area 6 on the end away from the first area 5 between the second liquid distributor 4 and the second partition 23, and the second partition 23 is provided with a third area 7 between the first gravity box 9, the first area 5 and the second area 6 are both provided with a plurality of groups of first heat exchange pipes 51 distributed at equal intervals, and the third area 7 is provided with a plurality of groups of third heat exchange pipes 71 distributed at equal intervals, the division of the first area 5, the second area 6 and the third area 7 shortens the straight falling distance of the liquid, avoids liquid droplets splashing, guarantees the safety of the device, the liquid uniformly enters the first area 5 and the second area 6 from the second liquid distributor 4, the division of the first area 5 and the second area 6 enables the liquid to fully exchange heat, drop onto a plurality of groups of first heat exchange pipes 51 to exchange heat and vaporize, and then the liquid is screened through the second through hole 24, and the remaining liquid uniformly enters the third area 7 through the second through hole 24 and then exchanges heat with the third heat exchange pipes 71.

[0029] In the embodiment, the implementation scene is specifically as follows: in actual use, when the distributor is put into use, the liquid enters the first liquid distributor 3 inside the main body 1 from the first liquid inlet pipe 11 and the second liquid inlet pipe 12, the liquid is preliminarily and uniformly mixed inside the first liquid distributor 3, then the liquid enters the second liquid distributor 4 from the first liquid distributor 3 through the first liquid outlet hole 31, and the liquid is mixed again in the second liquid distributor 4, the design of the two groups of liquid distributors guarantees that the liquid is fully mixed and uniform, the arc surface design of the second liquid distributor 4 enables the liquid to be uniformly distributed in the first area 5 and the second area 6 when the liquid passes through the second liquid outlet hole 41, the division of the first area 5 and the second area 6 enables the liquid to fully exchange heat, drop onto a plurality of groups of first heat exchange pipes 51 to exchange heat and vaporize, the first through hole 22 guarantees the flow between the first area 5 and the second area 6, so that the liquid that exchanges heat in the first area 5 and the second area 6 is the same, the liquid is screened through the second through hole 24, the remaining liquid uniformly enters the third area 7 through the second through hole 24 and then exchanges heat with the third heat exchange pipes 71, the liquid that exchanges heat and vaporizes is drawn into the gravity box 9 through the liquid inlet hole 91 and then discharged through the liquid outlet pipe 8, the flow state is stable, the gas is effectively discharged, the division of the first area 5, the second area 6 and the third area 7 shortens the straight falling distance of the liquid, avoids liquid droplets splashing, guarantees the safety of the device, compared with the distributor of the existing falling film evaporator, the distributor of the falling film evaporator can improve the overall practicability through the design.

[0030] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A distributor for a falling film evaporator comprising a main body (1), characterized in that: The inside of the main body (1) is provided with a center tube (2), the top of the main body (1) is provided with a first liquid inlet pipe (11) and a second liquid inlet pipe (12), one end of the first liquid inlet pipe (11) extending to the inside of the main body (1) is fixedly connected with a first liquid distributor (3), the end of the first liquid distributor (3) away from the second liquid inlet pipe (12) and located at the top of the center tube (2) is fixedly connected with a second liquid distributor (4), the center tube (2) is connected with the second liquid distributor (4) through a first partition plate (21), the outer side of the center tube (2) and located at both ends of the first partition plate (21) is fixedly connected with a second partition plate (23), the end of the center tube (2) away from the second liquid distributor (4) and located in the inside of the main body (1) is provided with a gravity box (9), the end of the gravity box (9) away from the second partition plate (23) and located in the inside of the main body (1) is provided with a liquid outlet pipe (8).

2. A distributor for use in a falling film evaporator according to claim 1, characterized in that: The end of the first liquid distributor (3) and the second liquid distributor (4) close to each other is provided with a plurality of groups of first liquid outlet holes (31) distributed at equal intervals, and the first liquid outlet holes (31) of the first liquid distributor (3) and the first liquid outlet holes (31) of the second liquid distributor (4) are designed to be matched.

3. A distributor for use in a falling film evaporator according to claim 2, characterized in that: The end of the second liquid distributor (4) away from the first liquid distributor (3) is designed in an arc shape, and a plurality of groups of second liquid outlet holes (41) distributed at equal intervals are formed in the end of the second liquid distributor (4) away from the first liquid distributor (3).

4. A distributor for use in a falling film evaporator according to claim 3, characterized in that: A plurality of groups of first through holes (22) distributed at equal intervals are formed in the outer side of the first partition plate (21), and a plurality of groups of second through holes (24) distributed at equal intervals are formed in the outer side of the second partition plate (23).

5. A distributor for use in a falling film evaporator according to claim 4, characterized in that: A plurality of groups of liquid inlet holes (91) distributed at equal intervals are formed in the end of the gravity box (9) close to the first partition plate (21).

6. A distributor for use in a falling film evaporator according to claim 5, characterized in that: A first area (5) is arranged on one side of the first partition plate (21) and between the second liquid distributor (4) and the second partition plate (23), a second area (6) is arranged at the end of the first partition plate (21) away from the first area (5) and between the second liquid distributor (4) and the second partition plate (23), and a third area (7) is arranged between the second partition plate (23) and the gravity box (9).

7. A distributor for use in a falling film evaporator according to claim 6, characterized in that: A plurality of groups of first heat exchange pipes (51) distributed at equal intervals are arranged in the inside of the first area (5) and the second area (6), and a plurality of groups of third heat exchange pipes (71) distributed at equal intervals are arranged in the inside of the third area (7).

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