Liquid blocking device of falling film evaporator

Abstract

The utility model belongs to the technical field of falling-film evaporators, particularly relates to a liquid blocking device of a falling-film evaporator, and aims to solve the problem that liquid is easy to carry in air suction when being sprayed to the periphery in the background technology, the following scheme is provided: the liquid blocking device comprises a shell, and the inner wall of the bottom of the shell is fixedly connected with a liquid blocking cylinder through a bolt; a butt-joint plate is welded to the outer wall of the top of the liquid blocking cylinder, and a liquid blocking cover is welded to the outer wall of the top of the butt-joint plate. The bow-shaped liquid blocking cover is arranged in the shell, liquid sprayed out of the spraying pipe can be blocked in the liquid blocking cover, the liquid is prevented from being sprayed all around, then gasified liquid on the periphery is separated from a backflow channel, and the phenomenon that liquid is carried in air suction is avoided; the liquid flow dividing area can be increased by means of the flow dividing holes in the buffer hopper, the liquid dripping speed can be effectively reduced, gasified liquid is distributed on all the heat exchange pipes in a concentrated mode, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of falling film evaporators, in particular to a liquid baffle device for a falling film evaporator. Background Art

[0002] The falling film evaporator has basically the same structure as the rising film evaporator. The difference is that after the raw material liquid is preheated, it enters the tube evenly from the top of the evaporator through the liquid distribution device, flows down along the inner wall of the tube in a film shape under the action of gravity, and is evaporated and concentrated. The gas-liquid mixture flows down in parallel and enters the separation chamber from the bottom of the heating tube.

[0003] During the use of the falling film evaporator, after the liquid sprayed by the spray pipe enters the inside of the shell, due to the relatively fast spraying speed, the liquid will be sprayed around, which will cause the vaporized liquid to not drip on the heat exchange tube concentratedly. Since the vaporized liquid around cannot be controlled to be separated from the return channel, the phenomenon of liquid entrainment by suction is likely to occur. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a liquid baffle device for a falling film evaporator, which overcomes the deficiencies of the prior art and effectively solves the problem that the liquid is sprayed around and the phenomenon of liquid entrainment by suction is likely to occur.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A liquid baffle device for a falling film evaporator, including a shell, the inner wall of the bottom of the shell is fixedly connected with a liquid baffle cylinder through bolts, and a docking plate is welded on the outer wall of the top of the liquid baffle cylinder, and a liquid baffle cover is welded on the outer wall of the top of the docking plate;

[0007] A plurality of connecting rods are welded on the inner wall of the liquid baffle cover at equal intervals, and a buffer hopper is welded on the outer wall of one end of the connecting rod, and a plurality of diversion holes are opened at equal intervals on the top of the outer wall of the buffer hopper.

[0008] Preferably, a spray pipe is fixedly connected to the inner wall of the top of the shell, and the spray pipe penetrates through the inside of the liquid baffle cover.

[0009] Preferably, a plurality of reinforcing ribs are welded between the docking plate and the liquid baffle cylinder at equal intervals.

[0010] Preferably, hanging rings are welded on both sides of the outer wall of the top of the docking plate.

[0011] Preferably, a first sealing member is fixedly connected to the outer wall of the top of the shell at the connection between the shell and the spray pipe.

[0012] Preferably, a second sealing member is fixedly connected to the outer wall of the top of the liquid baffle cover at the connection between the liquid baffle cover and the spray pipe.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. For the liquid retaining device of the falling film evaporator in this design, an arched liquid retaining cover is arranged inside the shell, which can block the liquid sprayed from the spray pipe inside the liquid retaining cover, prevent the liquid from spraying around, and then separate the vaporized liquid around from the reflux channel, preventing the phenomenon of liquid entrainment during suction;

[0015] 2. For the liquid retaining device of the falling film evaporator in this design, a buffer hopper is arranged inside the liquid retaining cover. Depending on the diversion holes on the buffer hopper, the area of liquid diversion can be increased, the speed of liquid dripping can be effectively reduced, the vaporized liquid can be concentrated and distributed on each heat exchange tube, and the heat exchange efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic diagram of the overall structure of a liquid retaining device for a falling film evaporator proposed by the present utility model;

[0017] Figure 2 FIG. is a schematic diagram of the internal structure of the shell of a liquid retaining device for a falling film evaporator proposed by the present utility model;

[0018] Figure 3 FIG. is a schematic diagram of the internal structure of the liquid retaining cover of a liquid retaining device for a falling film evaporator proposed by the present utility model.

[0019] In the figure: 1. Shell; 2. Liquid retaining cylinder; 3. Docking plate; 4. Liquid retaining cover; 5. Connecting rod; 6. Buffer hopper; 7. Diversion hole; 8. Spray pipe; 9. Reinforcing rib; 10. Hanging ring; 11. First seal; 12. Second seal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] Embodiment 1, referring to Figure 2 , a liquid retaining device for a falling film evaporator includes a shell 1. The inner wall of the bottom of the shell 1 is fixedly connected with a liquid retaining cylinder 2 by bolts, and a docking plate 3 is welded to the outer wall of the top of the liquid retaining cylinder 2, and a liquid retaining cover 4 is welded to the outer wall of the top of the docking plate 3.

[0022] In this embodiment, an arched liquid retaining cover 4 is arranged inside the shell 1, which can block the liquid sprayed from the spray pipe 8 inside the liquid retaining cover 4, prevent the liquid from spraying around, and then separate the vaporized liquid around from the reflux channel, preventing the phenomenon of liquid entrainment during suction.

[0023] Embodiment 2, referring to Figure 3, A liquid baffle device for a falling film evaporator. Connecting rods 5 are welded to the inner wall of the liquid baffle cover 4 at equidistant intervals, and a buffer hopper 6 is welded to the outer wall of one end of the connecting rod 5. Shunt holes 7 are provided at equidistant intervals at the top of the outer wall of the buffer hopper 6.

[0024] In this embodiment, a buffer hopper 6 is provided inside the liquid baffle cover 4. By relying on the shunt holes 7 on the buffer hopper 6, the area of liquid shunting can be increased, the speed of liquid dripping can be effectively reduced, so that the vaporized liquid is concentrated on each heat exchange tube, improving the heat exchange efficiency.

[0025] Refer to Figures 1 to 2 , A spray pipe 8 is fixedly connected to the inner wall of the top of the housing 1, and the spray pipe 8 is disposed through the inside of the liquid baffle cover 4.

[0026] Refer to Figure 2 , Reinforcing ribs 9 are welded between the docking plate 3 and the liquid baffle cylinder 2 at equidistant intervals.

[0027] Refer to Figure 2 , Hanging rings 10 are welded to both sides of the outer wall of the top of the docking plate 3.

[0028] Refer to Figure 1 , A first seal 11 is fixedly connected to the outer wall of the top of the housing 1 at the connection between the housing 1 and the spray pipe 8.

[0029] Refer to Figures 1 to 3 , A second seal 12 is fixedly connected to the outer wall of the top of the liquid baffle cover 4 at the connection between the liquid baffle cover 4 and the spray pipe 8.

[0030] Working principle: First, an arcuate liquid baffle cover 4 is provided inside the housing 1, which can block the liquid sprayed from the spray pipe 8 inside the liquid baffle cover 4 and block it inside the liquid baffle cylinder 2 to prevent the liquid from spraying around. At the same time, a buffer hopper 6 is provided inside the liquid baffle cover 4. By relying on the shunt holes 7 on the buffer hopper 6, the area of liquid shunting can be increased, the speed of liquid dripping can be reduced, and the vaporized liquid is concentrated on each heat exchange tube.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A liquid baffle device for a falling film evaporator, comprising a housing (1), characterized in that, The inner wall of the bottom of the housing (1) is fixedly connected with a liquid retaining cylinder (2) through bolts, and a butt plate (3) is welded to the outer wall of the top of the liquid retaining cylinder (2). A liquid retaining cover (4) is welded to the outer wall of the top of the butt plate (3). A plurality of connecting rods (5) distributed at equal intervals are welded to the inner wall of the liquid retaining cover (4), and a buffer hopper (6) is welded to the outer wall of one end of the connecting rod (5). A plurality of diversion holes (7) are formed in the top of the outer wall of the buffer hopper (6) at equal intervals.

2. The liquid baffle device of a falling film evaporator according to claim 1, characterized in that, A spray pipe (8) is fixedly connected to the inner wall of the top of the housing (1), and the spray pipe (8) is arranged through the inside of the liquid retaining cover (4).

3. The liquid baffle device of a falling film evaporator according to claim 1, characterized in that, A plurality of reinforcing ribs (9) distributed at equal intervals are welded between the butt plate (3) and the liquid retaining cylinder (2).

4. The liquid baffle device of a falling film evaporator according to claim 1, characterized in that, Hanging rings (10) are welded to both sides of the outer wall of the top of the butt plate (3).

5. The liquid baffle device of a falling film evaporator according to claim 1, characterized in that, A first seal (11) is fixedly connected to the outer wall of the top of the housing (1) at the connection between the housing (1) and the spray pipe (8).

6. The liquid-blocking device of a falling-film evaporator according to claim 1, characterized in that A second seal (12) is fixedly connected to the outer wall of the top of the liquid retaining cover (4) at the connection between the liquid retaining cover (4) and the spray pipe (8).

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