Material distribution structure and evaporation device

Abstract

The utility model provides a material distribution structure and an evaporation plant wherein the material distribution structure comprises: a distribution main body having a distribution cavity; the feeding structure is arranged on the distribution main body, the first end of the feeding structure penetrates out of the distribution main body and is communicated with the feeding part, and the second end of the feeding structure extends into the distribution cavity; the first distribution piece is arranged in the distribution cavity and is provided with a plurality of first through holes; the second distribution piece is arranged in the distribution cavity, the second distribution piece is located between the feeding structure and the first distribution piece, the second distribution piece and the feeding structure are arranged in a spaced mode, and the second distribution piece is provided with a plurality of second through holes; and the mounting structure is arranged on the distribution main body, is connected between the distribution main body and the evaporation part and is communicated with the distribution cavity and the evaporation part. According to the technical scheme, the problem that the inner wall surface of the distribution main body in the prior art is prone to scale hanging can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation equipment, in particular to a material distribution structure and an evaporation device. Background Art

[0002] Falling film evaporator is an evaporation equipment, which usually includes a feed part, a material distribution structure, an evaporation part and a discharge part which are arranged and connected in sequence from top to bottom; the working principle of the falling film evaporator is to add the feed liquid from the top of the evaporator (i.e. the feed part), and the feed liquid first passes through the distribution of the material distribution structure under the action of gravity, and then falls in the form of a film along the wall of the evaporation effect tube (i.e. the evaporation part), and evaporates and concentrates in this process, and finally a concentrated liquid is obtained at the bottom of the evaporator and discharged through the discharge part.

[0003] In this field, the material distribution structure usually includes a distribution body and a distributor arranged inside the distribution body; when the slurry is evenly distributed through the material distribution structure, the slurry usually splashes due to the distribution by the distributor. At this time, some of the slurry is easy to splash onto the inner wall surface of the distribution body, thereby causing scaling on the inner wall surface of the distribution body. Utility Model Content

[0004] The main purpose of the utility model is to provide a material distribution structure and an evaporation device to solve the problem that the inner wall surface of the distribution body in the related art is prone to fouling.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a material distribution structure is provided, which is arranged between the feed part of the evaporation device and the evaporation part of the evaporation device, and the material distribution structure includes: a distribution body, which has a distribution cavity; a feed structure, which is arranged on the distribution body, the first end of the feed structure passes through the distribution body and is connected with the feed part, and the second end of the feed structure extends into the distribution cavity; a first distribution member, which is arranged in the distribution cavity and has a plurality of first through holes; a second distribution member, which is arranged in the distribution cavity, the second distribution member is located between the feed structure and the first distribution member and is spaced from the feed structure, and the second distribution member has a plurality of second through holes; a mounting structure, which is arranged on the distribution body, the mounting structure is connected between the distribution body and the evaporation part and connects the distribution cavity and the evaporation part.

[0006] Furthermore, the cross-sectional area of ​​the second through hole gradually decreases in the direction from the second distribution member to the first distribution member.

[0007] Furthermore, the second distribution member is a plate-like structure, the second through hole has a large diameter opening and a small diameter opening, the diameter of the small diameter opening is between 3 mm and 6 mm; and / or the spacing distance between two adjacent second through holes is between 20 mm and 25 mm.

[0008] Further, projections of the second distribution member and the mounting structure on the first distribution member are both located within the range of the first distribution member; and / or, each first through hole and each second through hole are staggered.

[0009] Furthermore, the feeding structure includes a first tube body, a second tube body arranged outside the first tube body, and an insulation part arranged between the first tube body and the second tube body. The first end of the first tube body is connected to the feeding part, and the second end of the first tube body is spaced apart from the second distribution member.

[0010] Further, the second distribution member includes a base plate arranged along the transverse direction and a baffle plate arranged on the periphery of the base plate, and the baffle plate extends upward and outward.

[0011] Furthermore, the material distribution structure also includes a plurality of drainage columns extending in the up-down direction, and the upper ends of the drainage columns are connected to the lower surface of the second distribution member.

[0012] Furthermore, the feed structure includes a first feed piece and a second feed piece, the second distribution piece includes a first distribution body arranged corresponding to the first feed piece and a second distribution body arranged corresponding to the second feed piece, and the distance between the first distribution body and the first feed piece is greater than the distance between the second distribution body and the second feed piece.

[0013] Further, the spacing distance between two adjacent first through holes is between 50 mm and 55 mm; and / or the spacing distance between the second distribution member and the feeding structure is between 50 mm and 150 mm.

[0014] According to another aspect of the present invention, an evaporation device is provided, comprising a feed portion, a material distribution structure, an evaporation portion and a discharge portion which are sequentially connected and arranged, and the material distribution structure is the above-mentioned material distribution structure.

[0015] According to the technical solution of the utility model, the distribution body has a distribution cavity, and the distribution body provides a mounting base for various components of the material distribution structure. The first end of the feed structure passes through the distribution body and is connected to the feed part, and the second end of the feed structure extends into the distribution cavity. The feed structure is used to introduce liquid into the distribution cavity; the first distribution member is arranged in the distribution cavity, and the second distribution member is located between the feed structure and the first distribution member and is spaced from the feed structure. The first distribution member and the second distribution member cooperate with each other to evenly distribute the liquid introduced by the feed structure; the mounting structure is connected between the distribution body and the evaporation part and connects the distribution cavity and the evaporation part; so that the liquid can be evenly distributed through the multiple first through holes on the first distribution member. The liquid enters the evaporation part through the installation structure and is evaporated and concentrated; specifically, after the liquid is discharged from the feed structure into the distribution chamber, it first contacts with the second distribution member and is distributed, wherein, because the second distribution member has a plurality of second through holes, part of the liquid will contact with the second distribution member and move outward to be distributed, while part of the liquid will directly pass through the second through holes and move directly to the first distribution member. Compared with the solution in the related art that all the liquid is distributed by the distributor and moves outward, the solution of the utility model can relatively reduce the amount of liquid moving outward, thereby reducing the degree of liquid splashing, thereby reducing the possibility of liquid contacting the inner wall surface of the distribution body due to splashing, thereby reducing the possibility of scaling on the inner wall surface of the distribution body. Therefore, the technical solution of the present application can effectively solve the problem that scaling is easy to occur on the inner wall surface of the distribution body in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic cross-sectional view of a part of the structure of the first embodiment of the evaporation device according to the utility model is shown;

[0018] Figure 2 A schematic cross-sectional view showing a partial structure of a second distribution member of a second embodiment of an evaporation device according to the utility model;

[0019] Figure 3 A schematic cross-sectional view of a part of the structure of a third embodiment of the evaporation device according to the utility model is shown.

[0020] The above drawings include the following reference numerals:

[0021] D1, diameter of the small-diameter opening; D2, spacing between two adjacent second through holes; D3, distance between the first distribution body and the first feed piece; D4, distance between the second distribution body and the second feed piece; D5, spacing between two adjacent first through holes;

[0022] 1. Feeding section; 2. Evaporation section;

[0023] 10. distribution body; 11. distribution chamber;

[0024] 20. Feeding structure; 21. First tube body; 22. Second tube body; 23. Heat insulation part; 24. First feeding piece; 25. Second feeding piece;

[0025] 30. first distribution member; 31. first through hole;

[0026] 40, second distribution member; 41, second through hole; 411, large diameter opening; 412, small diameter opening; 42, base plate; 43, baffle; 44, first distribution body; 45, second distribution body;

[0027] 50. Installation structure; 51. Discharge hole;

[0028] 60. Drainage column;

[0029] 70. Connecting column. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0033] like Figure 1 As shown, the present application provides a material distribution structure, which is arranged between the feed part 1 of the evaporation device and the evaporation part 2 of the evaporation device. The first embodiment of the material distribution structure of the present application includes: a distribution body 10, a feed structure 20, a first distribution member 30, a second distribution member 40, and a mounting structure 50; the distribution body 10 has a distribution cavity 11; the feed structure 20 is arranged on the distribution body 10, the first end of the feed structure 20 passes through the distribution body 10 and is connected with the feed part 1, and the second end of the feed structure 20 extends into the distribution cavity 11; the first distribution member 30 is arranged in the distribution cavity 11 and has a plurality of first through holes 31; the second distribution member 40 is arranged in the distribution cavity 11, the second distribution member 40 is located between the feed structure 20 and the first distribution member 30 and is spaced from the feed structure 20, and the second distribution member 40 has a plurality of second through holes 41; the mounting structure 50 is arranged on the distribution body 10, and the mounting structure 50 is connected between the distribution body 10 and the evaporation part 2 and connects the distribution cavity 11 and the evaporation part 2.

[0034] According to the technical solution of the present embodiment, the distribution body 10 has a distribution cavity 11, and the distribution body 10 provides an installation basis for various components of the material distribution structure. The first end of the feed structure 20 passes through the distribution body 10 and is connected with the feed part 1, and the second end of the feed structure 20 extends into the distribution cavity 11. The feed structure 20 is used to introduce liquid into the distribution cavity 11; the first distribution member 30 is arranged in the distribution cavity 11, and the second distribution member 40 is located between the feed structure 20 and the first distribution member 30 and is spaced apart from the feed structure 20. The first distribution member 30 and the second distribution member 40 cooperate with each other to evenly distribute the liquid introduced by the feed structure 20; the installation structure 50 is connected between the distribution body 10 and the evaporation part 2 and connects the distribution cavity 11 and the evaporation part 2; so that the liquid passes through the multiple first through holes on the first distribution member 30. After being evenly distributed by the first distribution member 31, the liquid feed can enter the evaporation part 2 through the mounting structure 50 to be evaporated and concentrated; specifically, after the liquid feed is discharged from the feed structure 20 into the distribution chamber 11, it first contacts with the second distribution member 40 and is distributed, wherein, because the second distribution member 40 has a plurality of second through holes 41, part of the liquid feed will contact with the second distribution member 40 and move outward to be distributed, while part of the liquid feed will directly pass through the second through holes 41 and move directly to the first distribution member 30. Compared with the solution in the related art that all the liquid feed is distributed by the distributor and moves outward, the solution of this embodiment can relatively reduce the amount of liquid feed that moves outward, thereby reducing the degree of liquid feed splashing, thereby reducing the possibility of liquid feed contacting the inner wall surface of the distribution body 10 due to splashing, thereby reducing the possibility of scaling on the inner wall surface of the distribution body 10. Therefore, the technical solution of this embodiment can effectively solve the problem that scaling is easy to occur on the inner wall surface of the distribution body in the related art.

[0035] It should be noted that the distribution body 10 may be a cylindrical structure. In the present embodiment, the distribution body 10 is a cylindrical structure. The feed part 1, the material distribution structure and the evaporation part 2 are sequentially connected from top to bottom. The evaporation part 2 includes a plurality of evaporation effect tubes extending in the vertical direction. The mounting structure 50 includes a plurality of discharge holes 51 arranged on the lower surface of the distribution body 10. The plurality of discharge holes 51 are arranged one-to-one with the plurality of evaporation effect tubes. Each discharge hole 51 is connected with the corresponding evaporation effect tube and the distribution chamber 11. The first distribution member 30 and the second distribution member 40 are both plate-shaped structures, specifically circular plate-shaped structures, and the first through hole 31 penetrates the upper and lower surfaces of the first distribution member 30, and the second through hole 41 penetrates the upper and lower surfaces of the second distribution member 40. It should be noted that "the outward movement of the feed liquid" refers to the movement of the feed liquid in the direction away from the second distribution member 40.

[0036] In addition, the working principle of the evaporation device including the present embodiment is: during the falling film evaporation process (specifically when the feed liquid is in the evaporation effect tube), when there is sufficient heat flux intensity on the heating surface of the feed liquid (that is, the surface where the feed liquid is in direct contact with the evaporation effect tube) or the wall temperature of the evaporation effect tube exceeds a certain value of the feed liquid temperature, an extremely thin liquid layer (that is, a retained heat boundary layer) will be generated between the part of the feed liquid away from the evaporation effect tube and the heating surface of the feed liquid, and a temperature difference will be formed. This extremely thin liquid layer undergoes a phase change when heated, and evaporates due to the absorption of heat. In this way, the feed liquid does not have to reach the saturation temperature completely, and bubbles can be generated on the heating surface of the feed liquid to boil. The evaporation is completely carried out in an extremely thin liquid layer. This kind of boiling is called surface boiling. The vaporized steam and the feed liquid are led out from the lower end of the evaporation effect tube together, and the concentrated liquid is obtained after the vapor-liquid separation.

[0037] Especially when the evaporation device including this embodiment is used in the field of dairy product production, most of the structure of the evaporation device is made of stainless steel, and stainless steel has strong thermal conductivity. The heat in the evaporation part will also be transferred to the material distribution structure, especially the distribution body. When the feed liquid splashes onto the inner wall surface of the distribution body, the feed liquid is instantly overheated, which reduces the fluidity of the feed liquid and forms scale, which is easy to breed microorganisms. In the long run, there is a risk of unqualified related biochemical indicators, affecting the quality of dairy products. The technical solution of this embodiment can significantly reduce scale, thereby ensuring the quality of dairy products.

[0038] like Figure 1 As shown, the feed structure 20 includes a first tube body 21, a second tube body 22 disposed outside the first tube body 21, and a heat insulating portion 23 disposed between the first tube body 21 and the second tube body 22. The first end of the first tube body 21 is connected to the feed portion 1, and the second end of the first tube body 21 is spaced apart from the second distribution member 40. Specifically, the first tube body 21 is used to introduce the feed liquid into the distribution chamber 11, and the heat insulating portion 23 is used to keep the feed liquid in the first tube body 21 warm to ensure the temperature of the feed liquid. In this embodiment, the heat insulating portion 23 is a vacuum layer between the first tube body 21 and the second tube body 22. In addition, in other embodiments, the heat insulating portion can also be made of materials such as polyurethane and polystyrene.

[0039] like Figure 1As shown, the second distribution member 40 includes a base plate 42 arranged in the transverse direction and a baffle 43 arranged on the periphery of the base plate 42, and the baffle 43 extends upward and outward. In this embodiment, the second through hole 41 is arranged on the base plate 42, and the lower end of the baffle 43 is connected to the base plate 42. The baffle 43 is arranged around the periphery of the base plate 42 and extends upward and away from the base plate 42 (that is, outward). The baffle 43 can block part of the splashing liquid to further reduce the possibility of the liquid splashing onto the inner wall surface of the distribution body 10. The upper end of the baffle 43 is spaced from the inner wall surface of the distribution body 10, and the liquid can overflow from the upper end of the baffle 43 and move toward the first distribution member 30. In addition, in an embodiment not shown in the figure, the second through hole can be arranged on the baffle in addition to being arranged on the base plate.

[0040] like Figure 1 As shown, the material distribution structure further includes a plurality of drainage columns 60 extending in the up-down direction, and the upper ends of the drainage columns 60 are connected to the lower surface of the second distribution member 40. Specifically, the drainage columns 60 can guide the liquid material passing through the second through hole 41 downward, thereby also preventing the liquid material from splashing.

[0041] In addition, if Figure 1 As shown, the projections of the second distribution member 40 and the mounting structure 50 on the first distribution member 30 are both within the range of the first distribution member 30. Specifically, such a configuration enables the liquid material distributed by the second distribution member 40 to be completely moved to the first distribution member 30 and then distributed by the first distribution member 30, thereby achieving a multi-level distribution effect, thereby ensuring the uniform distribution effect of the material distribution structure on the liquid material.

[0042] In addition, each first through hole 31 is staggered with each second through hole 41. Specifically, the first distribution member 30 includes a plate substrate, and the first through hole 31 is arranged on the plate substrate; such an arrangement can ensure that the slurry can contact the plate substrate of the first distribution member 30 and be distributed after passing through the second through hole 41, and will not directly pass through the first through hole 31, thereby ensuring the uniform distribution effect of the slurry distributed by the first distribution member 30.

[0043] In addition, the present application also provides a second embodiment of the material distribution structure, the difference between the second embodiment and the first embodiment is that: Figure 2 As shown, the cross-sectional area of ​​the second through hole 41 gradually decreases in the direction from the second distribution member 40 to the first distribution member 30. Specifically, when the liquid flows from top to bottom through the second through hole 41 with a gradually decreasing cross-sectional area, the gradually decreasing aperture helps to reduce the eddy current and turbulence at the outlet, because the fluid flows along the hole wall of the second through hole 41, reducing the disturbance of the liquid perpendicular to the flow direction (i.e., the lateral direction), thereby also reducing the possibility of splashing of the liquid.

[0044] like Figure 2 As shown, the second distribution member 40 is a plate-like structure, and the second through hole 41 has a large diameter opening 411 and a small diameter opening 412, and the diameter D1 of the small diameter opening 412 is between 3 mm and 6 mm. Specifically, the second through hole 41 that meets the above requirements can ensure the smooth passage of the liquid, and can also reduce the eddy current and turbulence of the liquid discharged from the small diameter opening 412; the diameter D1 of the small diameter opening 412 can be 3 mm, 4 mm, 4.3 mm, 5 mm, 5.7 mm or 6 mm. It should be noted that "large diameter opening 411 and small diameter opening 412" refers to the fact that the diameter of the large diameter opening 411 is larger than the diameter of the small diameter opening 412, rather than limiting the diameter of the large diameter opening 411 and the diameter of the small diameter opening 412 to specific numerical values.

[0045] like Figure 2 As shown, the spacing distance D2 between two adjacent second through holes 41 is between 20 mm and 25 mm. Specifically, the "spacing distance between two adjacent second through holes 41" refers to the distance between the axes of two adjacent second through holes 41. Such a configuration can ensure that the number of second through holes 41 on the second distribution member 40 is sufficient, thereby preventing excessive splashing of the liquid feed, and on the other hand, can also ensure that the liquid feed can be fully contacted with the base plate 42 and distributed; the spacing distance D2 between two adjacent second through holes 41 can be 20 mm, 21 mm, 22 mm, 23 mm, 24 mm or 25 mm.

[0046] In addition, the present application also provides a third embodiment of the material distribution structure, the third embodiment is different from the first embodiment in that: Figure 3As shown, the feed structure 20 includes a first feed member 24 and a second feed member 25, and the second distribution member 40 includes a first distribution body 44 corresponding to the first feed member 24 and a second distribution body 45 corresponding to the second feed member 25, and the distance D3 between the first distribution body 44 and the first feed member 24 is greater than the distance D4 between the second distribution body 45 and the second feed member 25. Specifically, the evaporation device including this embodiment is used for multi-stage evaporation of liquid, that is, after the liquid is evaporated for the first time to form a concentrated liquid, the concentrated liquid passes through the feed part 1 again, and then passes through the material distribution structure, and then enters the evaporation effect tube for the second time to be evaporated again, and the cycle is repeated for many times to form a concentrated liquid that meets the required concentration. Therefore, the concentration of the liquid distributed by the material distribution structure will be different each time. Therefore, when multiple second distribution members 40 are arranged one-to-one with multiple feed structures 20, the spacing distance between the second distribution member 40 and the corresponding feed structure 20 is different, so that the material distribution structure can meet the requirements of preventing excessive splashing of liquids of different concentrations. The spacing distance between the second distribution member 40 and the feed structure 20 is between 50 mm and 150 mm; specifically, the spacing distance between the second distribution member 40 and the feed structure 20 can be 50 mm, 85 mm, 95 mm, 128 mm, 136 mm or 150 mm.

[0047] In addition, if Figure 3 As shown, the spacing distance D5 between two adjacent first through holes 31 is between 50 mm and 55 mm. Specifically, the "spacing distance between two adjacent first through holes 31" refers to the distance between the axes of two adjacent first through holes 31. This arrangement can ensure that the number of first through holes 31 on the first distribution member 30 is sufficient, and on the other hand, it can also ensure that the slurry can fully contact the plate substrate of the first distribution member 30 and be evenly distributed; the spacing distance D5 between two adjacent first through holes 31 can be 50 mm, 51 mm, 52 mm, 53 mm, 54 mm or 55 mm.

[0048] The present application also provides an evaporation device, which comprises a feed part 1, a material distribution structure, an evaporation part 2 and a discharge part which are connected in sequence, wherein the material distribution structure is the above-mentioned material distribution structure. The above-mentioned material distribution structure can effectively solve the problem that the inner wall surface of the distribution body in the related art is prone to fouling, and the evaporation device having the above-mentioned material distribution structure also has the above-mentioned advantages.

[0049] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0050] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0051] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A material distribution structure, arranged between a feed part (1) of an evaporation device and an evaporation part (2) of the evaporation device, characterized in that: The material distribution structure comprises: A dispensing body (10) having a dispensing chamber (11); A feeding structure (20) is arranged on the distribution body (10), a first end of the feeding structure (20) passes through the distribution body (10) and is connected to the feeding portion (1), and a second end of the feeding structure (20) extends into the distribution cavity (11); A first distribution member (30) is disposed in the distribution chamber (11) and has a plurality of first through holes (31); a second distribution member (40) disposed in the distribution chamber (11); the second distribution member (40) is located between the feed structure (20) and the first distribution member (30) and is spaced apart from the feed structure (20); the second distribution member (40) has a plurality of second through holes (41); The mounting structure (50) is arranged on the distribution body (10); the mounting structure (50) is connected between the distribution body (10) and the evaporation part (2) and connects the distribution chamber (11) and the evaporation part (2).

2. The material distribution structure according to claim 1, characterized in that: The cross-sectional area of ​​the second through hole (41) gradually decreases in a direction from the second distribution member (40) to the first distribution member (30).

3. The material distribution structure according to claim 2, characterized in that: The second distribution member (40) is a plate-like structure, the second through hole (41) has a large-diameter opening (411) and a small-diameter opening (412), and the diameter (D1) of the small-diameter opening (412) is between 3 mm and 6 mm; and / or, The spacing distance (D2) between two adjacent second through holes (41) is between 20 mm and 25 mm.

4. The material distribution structure according to claim 1, characterized in that: The projections of the second distribution member (40) and the mounting structure (50) on the first distribution member (30) are both located within the range of the first distribution member (30); and / or, Each of the first through holes (31) and each of the second through holes (41) are arranged in a staggered manner.

5. The material distribution structure according to claim 1, characterized in that: The feed structure (20) comprises a first tube body (21), a second tube body (22) arranged on the outside of the first tube body (21), and a heat insulating portion (23) arranged between the first tube body (21) and the second tube body (22); the first end of the first tube body (21) is connected to the feed portion (1), and the second end of the first tube body (21) is spaced apart from the second distribution member (40).

6. The material distribution structure according to claim 1, characterized in that: The second distribution member (40) comprises a base plate (42) arranged in a transverse direction and a baffle (43) arranged on the periphery of the base plate (42), wherein the baffle (43) extends upward and outward.

7. The material distribution structure according to any one of claims 1 to 6, characterized in that: The material distribution structure further comprises a plurality of drainage columns (60) extending in the up-down direction, and the upper ends of the drainage columns (60) are connected to the lower surface of the second distribution member (40).

8. The material distribution structure according to any one of claims 1 to 6, characterized in that: The feed structure (20) includes a first feed piece (24) and a second feed piece (25); the second distribution piece (40) includes a first distribution body (44) arranged corresponding to the first feed piece (24) and a second distribution body (45) arranged corresponding to the second feed piece (25); a distance (D3) between the first distribution body (44) and the first feed piece (24) is greater than a distance (D4) between the second distribution body (45) and the second feed piece (25).

9. The material distribution structure according to any one of claims 1 to 6, characterized in that: The spacing distance (D5) between two adjacent first through holes (31) is between 50 mm and 55 mm; and / or, The spacing distance between the second distribution member (40) and the feeding structure (20) is between 50 mm and 150 mm.

10. An evaporation device, comprising a feed part (1), a material distribution structure, an evaporation part (2) and a discharge part which are sequentially connected and arranged, characterized in that: The material distribution structure is the material distribution structure according to any one of claims 1 to 9.

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