Triple-effect falling film evaporator

Abstract

The utility model relates to the technical field of evaporators, and provides a triple-effect falling-film evaporator which comprises an evaporator body, a top cover installed at the top end of the evaporator body, a transmission pipe installed at the top end of the top cover, a plurality of falling-film pipes installed on the inner side wall of the evaporator body and a flow dividing mechanism arranged in the middle of the inner side wall of the evaporator body. The heating mechanism is arranged at the bottom end of the inner side wall of the evaporator main body and the inner side wall of the top cover, and the flow dividing mechanism comprises a fixing plate; through the arrangement of the flow dividing mechanism, entering liquid can be conveniently and uniformly divided, the liquid uniformly flows along the inner wall of the falling film tube, the situation that a liquid film in the falling film tube is too thin or a dry wall area is formed, and consequently the falling film tube is damaged is avoided, through the arrangement of the heating mechanism, water vapor generated by internal evaporation can be recycled, and the energy consumption is reduced. And the side wall of the falling film tube is heated by utilizing residual heat, so that the outer wall of the falling film tube is uniformly heated and fuel is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporators, in particular to a triple-effect falling film evaporator. Background Art

[0002] The three-effect falling film evaporator is a highly efficient evaporation equipment, mainly used for the concentration and evaporation of materials. The three-effect falling film evaporator adopts the falling film evaporation technology to transfer heat under the film to evaporate the liquid. The liquid flows down from the heating surface to form a thin film and evaporates during the heating process. The evaporator falling film tube is a key component of the falling film evaporator. Its function is to evenly inject the heated liquid into the falling film tube so that it can flow evenly and form a thin film on the inner wall.

[0003] When the existing three-effect falling film evaporator is in use, liquid may adhere to the wall or be heated unevenly, resulting in the liquid film in the falling film tube being too thin or forming a dry wall area. This uneven liquid film distribution will produce a large temperature difference with the non-dry wall area, which may easily cause deformation and damage of the falling film tube under the action of stress.

[0004] To this end, those skilled in the art have proposed a triple-effect falling film evaporator to solve the problems raised in the background technology. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a three-effect falling film evaporator to solve the problems of liquid hanging on the wall or uneven heating during use of the three-effect falling film evaporator in the prior art, resulting in too thin liquid film in the falling film tube or formation of dry wall area.

[0006] A triple-effect falling film evaporator comprises an evaporator body, a top cover is installed on the top of the evaporator body, a transmission pipe is installed on the top of the top cover, and a plurality of falling film tubes are installed on the inner side wall of the evaporator body;

[0007] A flow dividing mechanism, wherein the flow dividing mechanism is arranged in the middle of the inner side wall of the evaporator body;

[0008] The heating mechanism is arranged at the bottom end of the inner wall of the evaporator body and the inner wall of the top cover.

[0009] Preferably, the diversion mechanism includes a fixed plate, which is installed in the middle of the inner wall of the evaporator body, and a plurality of water-permeable holes are opened through the top of the fixed plate. A plurality of fixed rods are fixedly connected to the inner wall of the top cover, and a plurality of diversion plates are fixedly connected to the bottom ends of the plurality of fixed rods.

[0010] Preferably, a plurality of groups of the fixing rods are inserted through the inner side walls of a plurality of water-permeable holes, and a plurality of groups of the diverter plates are fixedly connected to the bottom ends of the fixing rods in a trapezoidal shape.

[0011] Preferably, the heating mechanism comprises an annular collector, which is mounted on the top of the inner wall of the top cover, a plurality of collecting heads are mounted on the bottom end of the annular collector, and two side walls of the annular collector are mounted with two shunt pipes.

[0012] Preferably, a bottom receiving plate is installed at the bottom end of the two diverter tubes, and a plurality of groups of spray heads are installed at the top end of the bottom receiving plate, and the spray heads are located at the bottom end of the cavity between the falling film tubes.

[0013] Preferably, the annular collector is installed in an annular shape at the top end of the inner side wall of the top cover, and a suction pump is installed on the inner side wall of the annular collector connected to the two diversion pipes.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. Through the setting of the diversion mechanism, the incoming liquid can be evenly diverted, allowing the liquid to flow evenly along the inner wall of the falling film tube, avoiding the liquid film in the falling film tube from being too thin or forming a dry wall area, causing damage to the falling film tube.

[0016] 2. Through the setting of the heating mechanism, the water vapor generated by internal evaporation can be recycled and utilized, and the residual temperature can be used to heat the side wall of the falling film tube, so that the outer wall of the falling film tube is heated evenly and fuel is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0018] Figure 2 For this utility model Figure 1 Structural diagram of the middle fixed plate;

[0019] Figure 3 For this utility model Figure 1 Schematic diagram of the cross-sectional structure of the middle top cover.

[0020] In the figure: 1. Evaporator body; 11. Top cover; 12. Transfer pipe; 2. Falling film tube; 21. Fixed plate; 22. Water permeable hole; 23. Fixed rod; 24. Diverter plate; 25. Collecting head; 26. Diverter pipe; 27. Bottom receiving plate; 28. Spray head; 29. ​​Annular collector. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] As attached Figure 1 To Attachment Figure 3 As shown:

[0023] Embodiment 1: The utility model provides a three-effect falling film evaporator, comprising an evaporator body 1, a top cover 11 is installed on the top of the evaporator body 1, a transmission pipe 12 is installed on the top of the top cover 11, and a plurality of falling film tubes 2 are installed on the inner side wall of the evaporator body 1;

[0024] A flow dividing mechanism, which is arranged at the middle of the inner side wall of the evaporator body 1;

[0025] A heating mechanism is arranged at the bottom end of the inner wall of the evaporator body 1 and the inner wall of the top cover 11. The diversion mechanism includes a fixed plate 21. The fixed plate 21 is installed in the middle of the inner wall of the evaporator body 1. A plurality of water permeable holes 22 are penetrated through the top of the fixed plate 21. A plurality of fixed rods 23 are fixedly connected to the inner wall of the top cover 11. A plurality of diversion plates 24 are fixedly connected to the bottom ends of the plurality of fixed rods 23. The plurality of fixed rods 23 are inserted into the inner wall of the plurality of water permeable holes 22. The plurality of diversion plates 24 are fixedly connected to the bottom ends of the fixed rods 23 in a trapezoidal shape.

[0026] Specifically, by disposing the splitter plate 24 , the liquid can be evenly dispersed, so that the liquid can be fully dispersed in the inner diameter of the falling film tube 2 .

[0027] The heating mechanism includes an annular collector 29, which is installed at the top of the inner wall of the top cover 11. A plurality of collecting heads 25 are installed at the bottom end of the annular collector 29. Two side walls of the annular collector 29 are installed with two shunt pipes 26. A bottom receiving plate 27 is installed at the bottom end of the two shunt pipes 26. A plurality of groups of spray heads 28 are installed at the top of the bottom receiving plate 27. The spray heads 28 are located at the bottom end of the cavity between the falling film tubes 2. The annular collector 29 is installed in an annular shape at the top of the inner wall of the top cover 11. A suction pump is installed at the inner wall of the annular collector 29 connected to the two shunt pipes 26.

[0028] Specifically, by setting up a suction pump, the water vapor gathered at the upper end can be guided to the bottom end to heat the pipeline.

[0029] As can be seen from the above, when this device is needed, the liquid first enters the top cover 11 through the transmission pipe 12, and then enters the top of the diverter plate 24 through the water permeable hole 22. The diverter plate 24 diverts the liquid so that the liquid enters the falling film tube 2 evenly, allowing the falling film tube 2 to heat it. After being heated for a period of time, the evaporated water vapor enters the top of the inner wall of the top cover 11. As the suction pump inside the annular collector 29 is turned on, the annular collector 29 sucks the water vapor through the collecting head 25, allowing it to be sprayed out from the spray head 28 through the diverter pipe 26 and the bottom receiving plate 27 to heat the outer wall of the falling film tube 2.

[0030] The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0031] In the description of the present utility model, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradiction.

[0035] In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A triple-effect falling film evaporator, characterized in that: It comprises an evaporator body (1), a top cover (11) is installed at the top of the evaporator body (1), a transmission pipe (12) is installed at the top of the top cover (11), and a plurality of falling film tubes (2) are installed on the inner side wall of the evaporator body (1); A flow dividing mechanism, the flow dividing mechanism being arranged in the middle of the inner side wall of the evaporator body (1); A heating mechanism is provided at the bottom end of the inner wall of the evaporator body (1) and the inner wall of the top cover (11).

2. A triple-effect falling film evaporator as claimed in claim 1, characterized in that: The flow dividing mechanism comprises a fixed plate (21), the fixed plate (21) being mounted in the middle of the inner wall of the evaporator body (1), a plurality of water permeable holes (22) being formed through the top of the fixed plate (21), a plurality of fixed rods (23) being fixedly connected to the inner wall of the top cover (11), and a plurality of diverter plates (24) being fixedly connected to the bottom ends of the plurality of fixed rods (23).

3. A triple-effect falling film evaporator as claimed in claim 2, characterized in that: A plurality of groups of the fixing rods (23) are inserted into the inner side walls of the plurality of water-permeable holes (22), and a plurality of groups of the diverter plates (24) are fixedly connected to the bottom ends of the fixing rods (23) in a trapezoidal shape.

4. A triple-effect falling film evaporator as claimed in claim 1, characterized in that: The heating mechanism comprises an annular collector (29), the annular collector (29) being mounted on the top end of the inner wall of the top cover (11), a plurality of collecting heads (25) being mounted on the bottom end of the annular collector (29), and two side walls of the annular collector (29) being mounted with two shunt pipes (26).

5. A triple-effect falling film evaporator as claimed in claim 4, characterized in that: A bottom receiving plate (27) is installed at the bottom end of the two diverter tubes (26), and a plurality of groups of spray heads (28) are installed at the top end of the bottom receiving plate (27). The spray heads (28) are located at the bottom end of the cavity between the falling film tubes (2).

6. A triple-effect falling film evaporator as claimed in claim 4, characterized in that: The annular collector (29) is installed in an annular shape at the top end of the inner wall of the top cover (11), and a suction pump is installed on the inner wall of the annular collector (29) connected to the two branch pipes (26).

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