Defoaming device of tubular falling film evaporator

Abstract

The defoaming device comprises a lower butt joint pipe and an upper butt joint pipe, the upper butt joint pipe is arranged at the top of the lower butt joint pipe, a first expansion cover is fixedly arranged on the outer wall of the top of the lower butt joint pipe, and a second expansion cover is fixedly arranged on the outer wall of the bottom of the upper butt joint pipe. An annular positioning cover is fixedly arranged on the outer wall of the first expansion cover and the outer wall of the second expansion cover, and foam suction pipes are fixedly arranged on the outer walls of the two sides of the bottom of the annular positioning cover through openings. Foam is collected through the annular positioning cover arranged between the first expansion cover and the second expansion cover, the annular positioning cover is matched with the fan to suck the foam in the annular positioning cover into the air cover, the foam in the air cover is rapidly input into the conical shell covers, and the foam passes through the inner spaces of the multiple sets of conical shell covers, so that the foam is formed. The inner cross sections of the conical shell cover for foam passing are different in size, the flow speed of the foam changes rapidly, the air pressure borne by the foam changes repeatedly, and the foam is rapidly broken.

Description

Technical Field

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

[0002] The tubular falling film evaporator is a device commonly used in industrial steam recovery, wastewater treatment, and seawater desalination. Its working principle is to guide the liquid substance entering the equipment through a pipe to the pipe wall, forming a thin film on the pipe wall, and then flowing downward through the pipe wall to contact with the steam gas flowing into the equipment from above, thereby realizing the process of heat and mass transfer, and finally evaporating the liquid substance into steam.

[0003] Falling film evaporator is prone to foaming during use. If the foam is not treated, it will be discharged along the steam pipe, eventually leading to blockage of the steam pipe and poor evaporation effect of the liquid. For this reason, we propose a defoaming device for tubular falling film evaporator. Utility Model Content

[0004] The purpose of the utility model is to provide a defoaming device for a tubular falling film evaporator to solve the above-mentioned technical deficiencies.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a defoaming device for a tubular falling film evaporator, comprising a lower butt joint tube and an upper butt joint tube, the upper butt joint tube is arranged at the top of the lower butt joint tube, the top outer wall of the lower butt joint tube is fixedly provided with a first expansion hood, the bottom outer wall of the upper butt joint tube is fixedly provided with a second expansion hood, the outer walls of the first expansion hood and the second expansion hood are fixedly provided with annular positioning hoods, the outer walls of both sides of the bottom of the annular positioning hood are fixedly provided with foam suction pipes through openings, the bottom outer wall of the foam suction pipe is connected to an air hood, the inner wall of the air hood is fixedly provided with a fan, the bottom outer wall of the air hood is connected to a first internally threaded tube through an opening, and the bottom of the air hood is provided with conical shell covers distributed at equal distances.

[0006] Preferably, a foam guide port is provided on the top inner wall of the annular positioning cover, and the top inner wall and the bottom inner wall of the foam guide port are fixedly connected to the top outer wall of the first expansion cover and the bottom outer wall of the second expansion cover respectively, so that the foam on the top of the first expansion cover can be guided to the interior of the annular positioning cover through the foam guide port.

[0007] Preferably, the top outer wall of the conical shell cover is connected to an internally threaded butt tube, the bottom outer wall of the conical shell cover is connected to a second internally threaded tube, adjacent conical shell covers are connected to each other through the internally threaded butt tube and the second internally threaded tube, and the top of the topmost conical shell cover is connected to the inner wall of the first internally threaded tube through the internally threaded butt tube.

[0008] Preferably, the bottom of the conical shell cover at the bottom is connected to a liquid guide hose through a second internal threaded tube, and a liquid guide hose joint is fixedly provided on the outer wall of one end of the bottom of the liquid guide hose, which connects the liquid guide hose joint to the evaporation chamber of the tubular evaporator, so as to facilitate redirecting the liquid generated after the foam bursts to the tubular evaporator for further evaporation.

[0009] Preferably, the bottom outer wall of the lower butt joint tube and the top outer wall of the upper butt joint tube are both fixed with flanges, the outer wall of the flange is provided with fixing holes distributed at equal distances, and the inner walls of the fixing holes are provided with matching bolts, so as to facilitate the installation of the utility model on the tubular evaporator.

[0010] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0011] The foam is collected by an annular positioning cover provided between the first expansion cover and the second expansion cover, and the foam in the annular positioning cover is sucked into the air cover with the help of a fan. The foam in the air cover is quickly input into the conical shell cover. The foam passes through the internal space of multiple groups of conical shell covers. The internal cross-section of the conical shell covers through which the foam passes is different. The flow rate of the foam changes rapidly, and the air pressure on the foam changes repeatedly, which causes the foam to burst quickly, thereby achieving the effect of removing foam. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of a defoaming device for a tubular falling film evaporator according to the present invention;

[0014] Figure 2 This is a schematic diagram of the lower butt joint structure of a defoaming device for a tubular falling film evaporator according to the present invention;

[0015] Figure 3 This is a schematic diagram of the upper butt joint structure of a defoaming device for a tubular falling film evaporator according to the present invention;

[0016] Figure 4 This is a schematic cross-sectional view of the annular positioning cover of a defoaming device of a tubular falling film evaporator according to the present invention;

[0017] Figure 5 This is a schematic diagram of the cross-sectional structure of a conical shell of a defoaming device of a tubular falling film evaporator of the utility model;

[0018] Figure 6The utility model is a schematic diagram of the conical shell structure of the defoaming device of a tubular falling film evaporator.

[0019] Description of reference numerals:

[0020] 1 lower butt joint, 2 first expansion cover, 3 upper butt joint, 4 second expansion cover, 5 annular positioning cover, 6 foam guide port, 7 foam suction pipe, 8 air cover, 9 fan, 10 first internally threaded pipe, 11 conical shell cover, 12 internally threaded butt joint, 13 second internally threaded pipe, 14 liquid guide hose, 15 liquid guide pipe joint, 16 flange, 17 fixing hole. DETAILED DESCRIPTION

[0021] The following diagrams illustrate various embodiments of the present invention. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some commonly used structures and components are depicted in simplified schematic form.

[0022] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] Example 1

[0024] Refer to the instruction manual Figure 1-5 A defoaming device for a tubular falling film evaporator comprises a lower butt joint tube 1 and an upper butt joint tube 3. The upper butt joint tube 3 is arranged at the top of the lower butt joint tube 1. A first expansion cover 2 is fixedly provided on the top outer wall of the lower butt joint tube 1. A second expansion cover 4 is fixedly provided on the bottom outer wall of the upper butt joint tube 3. An annular positioning cover 5 is fixedly provided on the outer walls of the first expansion cover 2 and the second expansion cover 4. A foam suction pipe 7 is fixedly provided on the outer walls of both sides of the bottom of the annular positioning cover 5 through openings. The bottom outer wall of the foam suction pipe 7 is connected to an air cover 8. A fan 9 is fixedly provided on the inner wall of the air cover 8. The bottom outer wall of the air cover 8 is connected to a first internal threaded tube 10 through an opening. The bottom of the air cover 8 is provided with conical shell covers 11 distributed at equal distances.

[0025] Example 2

[0026] Based on the first embodiment, a foam guide port 6 is provided on the top inner wall of the annular positioning cover 5. The top inner wall and the bottom inner wall of the foam guide port 6 are fixedly connected to the top outer wall of the first expansion cover 2 and the bottom outer wall of the second expansion cover 4 respectively. The foam on the top of the first expansion cover 2 is conveniently guided to the interior of the annular positioning cover 5 through the foam guide port 6. The bottom outer wall of the lower docking tube 1 and the top outer wall of the upper docking tube 3 are fixedly provided with a flange 16. The outer wall of the flange 16 is provided with fixing holes 17 distributed at equal distances. The inner wall of the fixing hole 17 is provided with corresponding bolts, which facilitates the installation of the utility model on the tubular evaporator.

[0027] Example 3

[0028] Based on the first embodiment, the top outer wall of the conical shell cover 11 is connected to an internally threaded butt joint 12, and the bottom outer wall of the conical shell cover 11 is connected to a second internally threaded tube 13. Adjacent conical shell covers 11 are connected to each other through the internally threaded butt joint 12 and the second internally threaded tube 13. The top of the topmost conical shell cover 11 is connected to the inner wall of the first internally threaded tube 10 through the internally threaded butt joint 12, and the bottom of the bottommost conical shell cover 11 is connected to a liquid guide hose 14 through the second internally threaded tube 13. A liquid guide hose joint 15 is fixedly provided on the outer wall of one end of the bottom of the liquid guide hose 14, and the liquid guide hose joint 15 is connected to the evaporation chamber of the tubular evaporator, so as to redirect the liquid generated after the foam bursts to the tubular evaporator for further evaporation.

[0029] Working principle of this utility model:

[0030] Refer to the instruction manual Figure 1-6 When the present invention is in use, the flange 16 provided on the lower butt joint 1 and the upper butt joint 3 is fixed to the exhaust channel of the tubular falling film evaporator by means of bolts passing through the fixing holes 17, and the liquid guide pipe joint 15 provided at the bottom of the liquid guide hose 14 is connected to the inside of the evaporation chamber of the evaporator. When the tubular falling film evaporator produces foam, the foam passes through the evaporation pipe of the falling film device through the lower butt joint 1 and enters the top of the first expansion cover 2, and the foam flows into the annular positioning cover 5 between the first expansion cover 2 and the second expansion cover 4. At this time, the fan 9 starts to work, and the foam in the annular positioning cover 5 is sucked into the air cover 8, and the foam in the air cover 8 is input into the conical shell cover 11. The foam passes through the internal space of multiple groups of conical shell covers 11, and the internal cross-section of the conical shell cover 11 where the foam passes changes rapidly, so that the air pressure on the foam changes repeatedly, which causes the foam to burst quickly. The liquid produced by the bursting foam flows back into the evaporation chamber of the tubular falling film evaporator through the liquid guide pipe joint 15 to continue evaporating.

[0031] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A defoaming device for a tubular falling film evaporator, comprising a lower butt joint pipe (1) and an upper butt joint pipe (3), wherein the upper butt joint pipe (3) is arranged on the top of the lower butt joint pipe (1), and is characterized in that: The top outer wall of the lower butt joint tube (1) is fixedly provided with a first expansion cover (2), the bottom outer wall of the upper butt joint tube (3) is fixedly provided with a second expansion cover (4), the outer walls of the first expansion cover (2) and the second expansion cover (4) are fixedly provided with an annular positioning cover (5), the outer walls on both sides of the bottom of the annular positioning cover (5) are fixedly provided with a foam suction pipe (7) through an opening, the bottom outer wall of the foam suction pipe (7) is connected to an air cover (8), the inner wall of the air cover (8) is fixedly provided with a fan (9), the bottom outer wall of the air cover (8) is connected to a first internally threaded tube (10) through an opening, and the bottom of the air cover (8) is provided with conical shell covers (11) distributed at equal distances.

2. The defoaming device of a tubular falling film evaporator according to claim 1, characterized in that: The top inner wall of the annular positioning cover (5) is provided with a foam guide port (6), and the top inner wall and the bottom inner wall of the foam guide port (6) are fixedly connected to the top outer wall of the first expansion cover (2) and the bottom outer wall of the second expansion cover (4), respectively.

3. The defoaming device of a tubular falling film evaporator according to claim 1, characterized in that: The top outer wall of the conical shell cover (11) is connected to an internally threaded butt joint pipe (12), and the bottom outer wall of the conical shell cover (11) is connected to a second internally threaded pipe (13). Adjacent conical shell covers (11) are connected to each other through the internally threaded butt joint pipe (12) and the second internally threaded pipe (13). The top of the topmost conical shell cover (11) is connected to the inner wall of the first internally threaded pipe (10) through the internally threaded butt joint pipe (12).

4. The defoaming device of a tubular falling film evaporator according to claim 1, characterized in that: The bottom of the conical shell (11) at the bottom is connected to a liquid guiding hose (14) via a second internally threaded tube (13), and a liquid guiding hose joint (15) is fixedly provided on the outer wall of one end of the bottom of the liquid guiding hose (14).

5. The defoaming device of a tubular falling film evaporator according to claim 1, characterized in that: The bottom outer wall of the lower butt joint pipe (1) and the top outer wall of the upper butt joint pipe (3) are both fixed with flanges (16), the outer wall of the flange (16) is provided with fixing holes (17) distributed at equal distances, and the inner walls of the fixing holes (17) are provided with matching bolts.

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