Carrier tape evaporative wet film apparatus

Abstract

The present invention provides a carrier evaporation wet film device, comprising: at least one housing and at least one wet film unit, wherein the housing is used to be installed on the frame of the carrier evaporation device, the housing has an installation channel extending in a horizontal direction, and a first sliding member is provided in the installation channel; the wet film unit is provided with a second sliding member, and the wet film unit is detachably inserted into the installation channel through the sliding engagement of the second sliding member and the first sliding member.

Description

Technical Field

[0001] This invention relates to the field of waste management technology, and more specifically to a carrier belt evaporation wet film device. Background Technology

[0002] With the comprehensive advancement of the national dual-carbon strategy and the increasingly urgent need for energy security, the resources of high-quality coastal nuclear power plant sites are becoming increasingly saturated.

[0003] The compliant discharge of low- and intermediate-level radioactive waste liquids from nuclear power plants is one of the key issues restricting the further development of nuclear power plant sites. Nuclear power plants generate large amounts of low- and intermediate-level radioactive waste liquids throughout their operation, maintenance, and decommissioning processes. After treatment to meet standards, these waste liquids are typically discharged into receiving water bodies such as oceans, lakes, and rivers using a monitored discharge method, where they are naturally diluted and dispersed to harmless levels. However, some nuclear power plant sites face practical problems such as the distance to receiving water bodies being too far, the high cost of constructing and maintaining long-distance discharge pipelines, or even the lack of suitable receiving water bodies. Conventional liquid discharge methods can no longer fully meet actual usage requirements.

[0004] The liquid-to-gas technology converts liquid effluent into gaseous effluent for discharge, which can effectively solve the problem of waste liquid disposal in areas where there is no suitable receiving water body site, and the relevant process has been verified to be feasible in practice.

[0005] Currently, liquid-to-gas conversion technologies are mainly divided into three categories: natural evaporation pond technology, micro-mist evaporation emission, and air-carrying evaporation emission. Natural evaporation ponds have advantages such as low initial investment, simple operation, and low radiation impact on personnel; however, they are significantly affected by natural conditions such as solar radiation, ambient temperature, and wind speed, and have stringent requirements for the plant site's geographical location. High-pressure micro-mist evaporation forms micro-mist through high-pressure nozzles and uses airflow for evaporation, but it suffers from drawbacks such as complex process flow, large equipment investment, and a large amount of secondary waste generation. Air-carrying evaporation utilizes the unsaturated nature of air humidity, circulating and humidifying compliant waste liquid on a wet film carrier, converting liquid water into water vapor for emission. It has outstanding advantages such as small footprint, simple process flow, and low amount of secondary waste, making it the most valuable liquid-to-gas conversion technology solution for engineering applications.

[0006] The core principle of air-carrying evaporation is to form a uniform liquid film on the surface of the wet film, and to complete the conversion of liquid water to gas through full contact between the liquid film and the air. The material, structure and effective utilization rate of the wet film directly determine the humidification efficiency and the overall processing capacity of the device.

[0007] In existing nuclear power waste carrier evaporation treatment equipment, the wet membrane module mostly adopts an integral fixed installation structure, with the wet membrane unit rigidly connected to the equipment housing. During long-term operation, the wet membrane is susceptible to aging, blockage, or damage due to radioactive irradiation and media corrosion. Maintenance requires disassembling a large number of fixed components, which is cumbersome and time-consuming, significantly reducing the efficiency of equipment operation and maintenance and the stability of continuous operation, while also increasing the risks of working in a radioactive environment.

[0008] In addition, traditional fixed wet film units are difficult to replace flexibly and modularly combine, and cannot be adapted to carrier evaporation scenarios with different air volumes and processing capacities. When a local wet film is damaged, the entire module needs to be replaced, resulting in high maintenance costs and low material utilization.

[0009] Based on this, the inventors of this application propose a carrier evaporation wet film device in order to solve one or more of the above-mentioned technical problems. Summary of the Invention

[0010] The present invention solves the above-mentioned technical problems through the following technical solution: This invention provides a carrier-based evaporation wet film device, comprising: At least one housing for mounting on a frame of a carrier evaporator, the housing having a horizontally extending mounting channel, the mounting channel having a first sliding member; At least one wet film unit is provided, the wet film unit is provided with a second sliding member, and the wet film unit can be detachably inserted into the installation channel through the sliding engagement of the second sliding member and the first sliding member.

[0011] According to one embodiment of the present invention, the first slider and the second slider are any combination of mutually adapted guide rail and slider, slide groove and slider, or roller and slide rail.

[0012] According to one embodiment of the present invention, the wet film unit includes a housing, a wet film, a water distribution pipe, and a water distribution plate; The outer shell has a receiving cavity with a top opening, the wet film is installed in the receiving cavity, the water distribution plate is installed above the wet film, and the water distribution pipe is installed above the water distribution plate. The water distribution pipe has multiple water outlet holes at one end away from the water distribution plate, and the water distribution plate has multiple evenly distributed flow holes. The water sprayed from the water distribution pipe flows to the wet film through the flow holes. The outer casing has an opening on one side along the direction of the mounting channel, and multiple vent holes on the other side, which are connected to the accommodating cavity.

[0013] According to one embodiment of the present invention, the water outlet holes of the water distribution pipe are symmetrically opened with respect to the vertical plane of the water distribution pipe axis and are arranged in two rows at an angle. The water distribution pipe includes multiple branch pipes arranged in parallel.

[0014] According to one embodiment of the present invention, the flow holes of the water distribution plate are arranged in an array with equal diameter and equal spacing, and the diameter and spacing of the flow holes are matched with the cross-section of the wet film.

[0015] According to one embodiment of the present invention, the two axial ends of the water distribution pipe are respectively clamped to the outer casing by pipe clamps.

[0016] According to one embodiment of the present invention, a buffer gap is provided between the water distribution plate and the water distribution pipe, forming a stable flow water distribution cavity.

[0017] According to one embodiment of the present invention, the wet film is a stainless steel wire corrugated packing. The surface of the stainless steel wire corrugated filler is provided with multiple punches and / or punctures.

[0018] According to one embodiment of the present invention, the stainless steel wire corrugated filler is fixedly connected to the outer shell by spot welding.

[0019] According to one embodiment of the present invention, at least one reflux hole is provided on the bottom plate of the outer casing, the reflux hole being used to return unevaporated waste liquid to the recovery water tank below the carrier belt evaporation wet film device.

[0020] The positive and progressive effects of this invention are as follows: The present invention relates to a carrier evaporation wet film device. By setting a horizontally penetrating installation channel and a first sliding member in the housing, and setting a corresponding second sliding member in the wet film unit, the wet film unit can be detached and inserted by means of sliding cooperation. This significantly improves the convenience of wet film unit disassembly, assembly and maintenance, reduces the operation difficulty and operational risks under radioactive conditions, and enables modular and rapid replacement of wet film units, effectively improving the operational stability and maintenance efficiency of the carrier evaporation device. Attached Figure Description

[0021] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the carrier belt evaporation wet film device of the present invention, along with the housing and frame, before assembly. Figure 2 for Figure 1 Right view of the carrier belt evaporation wet film device; Figure 3 for Figure 1 An isometric view of the carrier belt evaporation wet film device at one angle; Figure 4 for Figure 1 Another isometric view of the carrier belt evaporation wet film device.

[0022] 1. Housing; 11. Installation channel; 12. First sliding component; 2. Frame; 3. Wet film unit; 31. Second sliding member; 32. Outer shell; 321. Receiving cavity; 322. Return hole; 323. Air vent; 33. Wet film; 34. Water distribution pipe; 341. Water outlet; 342. Pipe clamp; 343. Branch pipe; 35. Water distribution plate; 351. Flow hole; 36. Water distribution chamber; 4. Recycling tank. Detailed Implementation

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0024] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0026] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0027] Existing carrier-based wet film evaporation units generally adopt a fixed, integrated installation method, lacking sliding fits and quick-disassembly structures. Replacement and maintenance of the wet film unit require extensive disassembly of fixed components, resulting in complex, time-consuming, and labor-intensive operations, low maintenance efficiency, and high risks associated with radioactive work. Furthermore, the integrated structure makes it difficult to flexibly adapt to different processing conditions; partial damage necessitates complete replacement, leading to high maintenance costs and failing to meet the practical requirements of efficient, safe, and convenient operation and maintenance in nuclear power waste treatment scenarios.

[0028] Based on this, please refer to Figure 1 and Figure 2 This application proposes a carrier evaporation wet film device, including at least one housing 1 and at least one wet film unit 3. The housing 1 is used to be mounted on the frame 2 of the carrier evaporation device. The housing 1 and the frame 2 can be connected by welding or bolts, which is not limited here. The shape of the housing 1 is adapted to the shape of the frame 2 of the carrier evaporation device.

[0029] The housing 1 has a horizontally extending installation channel 11, and a first sliding member 12 is provided in the installation channel 11. The wet film unit 3 is provided with a second sliding member 31, and the wet film unit 3 is detachably inserted into the installation channel 11 through the sliding engagement of the second sliding member 31 and the first sliding member 12.

[0030] like Figure 1 As shown, fresh air from outside blows towards frame 2 from the right side. A housing 1 is located on the left side of frame 2, which houses the wet film unit 3. The wet film unit 3 is detachably installed inside the housing 1, and the fresh air from outside passes through the wet film unit 3 to remove moisture from the liquid film. The left and right sides mentioned above refer to... Figure 1 This is a reference point, not a limitation on the actual orientation of the box 1 and the frame 2.

[0031] It should be noted that, Figure 1 The example described uses one housing 1 and one wet film unit 3. However, in actual applications, multiple housings 1 can be set on the frame 2, and each housing 1 corresponds to one wet film unit 3. By quickly assembling and disassembling the wet film unit 3, it can be flexibly adapted to carrier evaporation scenarios with different air volumes and different processing capacities.

[0032] Please continue to refer to Figure 1 The wet film unit 3 and the housing 1 are assembled in a drawer-type manner. For example, the first sliding part 12 on the housing 1 is a guide rail, and the second sliding part 31 of the wet film unit 3 is a slider. The wet film unit 3 and the housing 1 can be quickly assembled and disassembled through the cooperation of the slider and the guide rail.

[0033] Alternatively, the first sliding member 12 and the second sliding member 31 can also be configured as a groove and a slider or a roller and a rail; this is not limited here. Figure 1 As shown, the operator can quickly install or remove the wet membrane unit 3 by holding the handle on the wet membrane unit 3 along the installation channel 11.

[0034] That is, by setting a horizontally penetrating installation channel 11 and a first sliding member 12 in the housing 1, and configuring a matching second sliding member 31 in the wet film unit 3, the wet film unit 3 can be detachably installed by sliding insertion, which greatly simplifies the disassembly, assembly and maintenance process of the wet film unit 3, reduces the difficulty and risk of operation for operators in a radioactive environment, and improves the operation and maintenance efficiency and continuous operation stability of the wet film device.

[0035] Please refer to Figure 1 , Figure 2 and Figure 4 The wet film unit 3 includes a housing 32, a wet film 33, a water distribution pipe 34, and a water distribution plate 35. The housing 32 has a receiving cavity 321 with a top opening. The wet film 33 is installed in the receiving cavity 321, the water distribution plate 35 is installed above the wet film 33, and the water distribution pipe 34 is installed above the water distribution plate 35. The end of the water distribution pipe 34 facing away from the water distribution plate 35 has multiple water outlet holes 341, and the water distribution plate 35 has multiple evenly distributed flow holes 351. The water sprayed from the water distribution pipe 34 flows to the wet film 33 through the flow holes 351 to form a stable liquid film on the wet film 33.

[0036] Furthermore, the outer casing 32 has an opening on one side along the direction of the mounting channel 11, and multiple air vents 323 are provided on the other side, with the air vents 323 communicating with the accommodating cavity 321.

[0037] Optionally, the cross-sectional shape of the vent 323 can be circular, square, or triangular, and is not limited here. This arrangement of the outer casing 32 improves the support stability of the wet film 33 by utilizing the plate with the vent 323, preventing the wet film 33 from detaching from the outer casing 32 due to airflow impact. That is, the multiple vents 323 are arranged in a grid pattern, which can limit the movement of the wet film unit 3.

[0038] In actual operation, one end of the water distribution pipe 34 is connected to the water distribution pump, which pumps water from the recovery water tank 4 below the carrier evaporation wet film device to the water distribution pipe 34. The water is then sprayed upward through the water outlet 341 of the water distribution pipe 34 and falls onto the water distribution plate 35, forming a relatively stable water layer on the surface of the water distribution plate 35. The water on the surface of the water distribution plate 35 flows to the wet film 33 through the flow hole 351 to form a stable and continuous liquid film on the wet film 33. Fresh air blown into the wet film unit 3 from the outside can carry away the moisture in the liquid film, thus completing the carrier evaporation process. The medium that absorbs moisture flows through the air hole 323 to the downstream exhaust pipe (not shown) and is finally discharged to the outside.

[0039] In one embodiment, the water outlet holes 341 of the water distribution pipe 34 are symmetrically opened with respect to the vertical plane of the axis of the water distribution pipe 34 and are arranged in two rows at an angle.

[0040] Furthermore, the water distribution pipe 34 includes multiple branch pipes 343 arranged in parallel.

[0041] like Figure 2 As shown, the water outlet holes 341 of the water distribution pipe 34 are arranged in two rows of oblique angles in a vertically symmetrical manner, which can expand the water outlet coverage area and make the water flow more evenly sprayed onto the water distribution plate 35, thereby forming a uniform liquid layer on the water distribution plate 35, avoiding local water flow concentration, and further improving the uniformity of water distribution and the effect of stable flow.

[0042] That is, water outlet holes 341 are opened at intervals along the axial direction of the water distribution pipe 34, thereby improving the uniformity of water spraying.

[0043] In one embodiment, the flow holes 351 of the water distribution plate 35 are arranged in an array with equal diameter and equal spacing, and the diameter and spacing of the flow holes 351 match the cross-section of the wet film 33.

[0044] By employing a flow-through hole 351 arranged in an array with equal aperture and spacing, and with the aperture and spacing matching the cross-section of the wet film 33, it can be ensured that the water flow can pass through the water distribution plate 35 evenly and fully cover the wet film 33, thereby eliminating water distribution dead angles and improving the uniformity of liquid film distribution and evaporation efficiency of the wet film 33.

[0045] Please continue to refer to Figure 2 The two ends of the water distribution pipe 34 are respectively clamped to the outer casing 32 by pipe clamps 342.

[0046] Using the clamp 342 to fix the water distribution pipe 34 can improve the ease of installation and disassembly of the water distribution pipe 34, thereby facilitating the inspection, cleaning and replacement of the water distribution pipe 34, while also ensuring the stability of the installation of the water distribution pipe 34.

[0047] The number of pipe clamps 342 can be set according to the placement position and angle of the water distribution pipe 34. For example, one pipe clamp 342 can be set at each end of the axial direction of the water distribution pipe 34, or two pipe clamps 342 can be set at each end of the axial direction of the water distribution pipe 34. There is no limitation here.

[0048] Please continue to refer to Figures 1 to 3 There is a buffer gap between the water distribution plate 35 and the water distribution pipe 34, forming a stable flow water distribution cavity 36.

[0049] By setting a buffer gap between the water distribution plate 35 and the water distribution pipe 34 to form a stable flow water distribution cavity 36, the water flow sprayed from the water distribution pipe 34 can be buffered and pressure equalized, avoiding direct impact of the water flow on the water distribution plate 36. Water flow with excessive speed is difficult to form a stable liquid film on the wet film 33. The setting of the water distribution cavity 36 can make the water flow pass through the water distribution plate 35 smoothly and evenly, further improving the water distribution uniformity of the wet film 33.

[0050] Optionally, the wet film 33 is a stainless steel wire corrugated packing; the surface of the stainless steel wire corrugated packing has multiple punches and / or punctures (not shown).

[0051] Specifically, the stainless steel wire corrugated packing has a wire diameter of 0.2-1mm, a corrugation height of 4-10mm, a corrugation spacing of 5-20mm, a specific surface area of ​​200-250m² / m³, and a porosity of 90-95%. The stainless steel wire corrugated packing is fixedly connected to the outer shell 32 by spot welding.

[0052] This application uses stainless steel wire corrugated packing with perforations and / or punctures because it is radiation resistant, corrosion resistant, has a long service life, and the surface punctures can improve the adhesion and diffusion of water film. While ensuring structural strength, it is also beneficial to improve the specific surface area and humidification efficiency of wet film 33.

[0053] The wet film 33 and the outer shell 32 can be fixedly connected by spot welding or by snap-fit ​​connection, which is not limited here.

[0054] Please continue to refer to Figure 1 At least one reflux hole 322 is provided on the bottom plate of the outer casing 32. The reflux hole 322 is used to return the unevaporated waste liquid to the recovery water tank 4 below the carrier belt evaporation wet film device.

[0055] Unevaporated waste liquid flowing out through the return hole 322 can flow over the upper surface of the bottom plate of the tank 1 and then flow to the recycling tank 4; or a hole (not shown in the figure) can be opened on the bottom plate of the tank 1 so that the unevaporated waste liquid can flow directly to the recycling tank 4 through the hole. Both methods are acceptable and are not limited here.

[0056] In summary, the carrier-based evaporative wet film device proposed in this application has at least the following advantages: First, the detachable insertion structure with sliding cooperation between the housing 1 and the wet membrane unit 3 significantly reduces the difficulty of maintenance and replacement of the wet membrane 33, reduces the operational risks in a radioactive environment, and significantly improves the operation and maintenance efficiency and operational stability of the wet membrane device.

[0057] Second, the double-layer uniform water distribution structure formed by the water distribution pipe 34 and the water distribution plate 35 effectively improves the uniformity of liquid film distribution on the surface of the wet film 33, and improves the effective utilization rate and saturated humidification efficiency of the wet film 33.

[0058] Third, the modular design of the wet film unit 3 and the housing 1 can flexibly adapt to different air volume and different processing capacity of the carrier evaporation working conditions. Local damage does not require the whole unit to be replaced, which greatly reduces the operation and maintenance costs and improves the material utilization rate.

[0059] Fourth, the design of using radiation-resistant stainless steel corrugated wet film and steady flow water distribution chamber 36 takes into account structural strength, evaporation efficiency and long-term operational reliability, and can better meet the engineering application requirements of nuclear power low-level radioactive waste liquid carrier evaporation treatment.

[0060] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used here to describe the spatial positional relationship of a device or feature as shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device as described in the figure. For example, if a device in the figure is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures.

[0061] Therefore, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein shall be interpreted accordingly.

[0062] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0063] Furthermore, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application's specification may have been chosen by the applicant according to his or her judgment, and their detailed meanings are explained in the relevant sections of the description herein. Moreover, this application is to be understood not only by the actual terms used, but also by the meaning implied by each term.

[0064] Flowcharts are used in this application to illustrate the operations performed by the system according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, various steps can be processed in reverse order or simultaneously. Furthermore, other operations may be added to these processes, or one or more steps may be removed from these processes.

[0065] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0066] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0067] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples by the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%.

[0068] Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, the numerical parameters should take into account a specified number of significant digits and employ a general method of digit preservation. Although the numerical ranges and parameters used to confirm their breadth of application in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0069] Although this application has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, any changes or modifications to the above embodiments within the essential spirit of this application will fall within the scope of the claims of this application.

Claims

1. A carrier-based evaporation wet film device, characterized in that, include: At least one housing for mounting on a frame of a carrier evaporator, the housing having a horizontally extending mounting channel, the mounting channel having a first sliding member; At least one wet film unit is provided, the wet film unit is provided with a second sliding member, and the wet film unit can be detachably inserted into the installation channel through the sliding engagement of the second sliding member and the first sliding member.

2. The carrier belt evaporation wet film apparatus according to claim 1, characterized in that, The first slider and the second slider are any combination of mutually compatible guide rail and slider, slide groove and slider, or roller and slide rail.

3. The carrier belt evaporation wet film apparatus according to claim 1, characterized in that, The wet film unit includes a housing, a wet film, a water distribution pipe, and a water distribution plate; The outer shell has a receiving cavity with a top opening, the wet film is installed in the receiving cavity, the water distribution plate is installed above the wet film, and the water distribution pipe is installed above the water distribution plate. The water distribution pipe has multiple water outlet holes at one end away from the water distribution plate, and the water distribution plate has multiple evenly distributed flow holes. The water sprayed from the water distribution pipe flows to the wet film through the flow holes. The outer casing has an opening on one side along the direction of the mounting channel, and multiple vent holes on the other side, which are connected to the accommodating cavity.

4. The carrier belt evaporation wet film apparatus according to claim 3, characterized in that, The water outlet holes of the water distribution pipe are symmetrically opened with respect to the vertical plane of the water distribution pipe axis and are arranged in two rows at an angle. The water distribution pipe includes multiple branch pipes arranged in parallel.

5. The carrier belt evaporation wet film apparatus according to claim 3, characterized in that, The flow holes of the water distribution plate are arranged in an array with equal diameter and equal spacing, and the diameter and spacing of the flow holes are matched with the cross-section of the wet film.

6. The carrier belt evaporation wet film apparatus according to claim 3, characterized in that, Both ends of the water distribution pipe are respectively clamped to the outer casing by pipe clamps.

7. The carrier belt evaporation wet film apparatus according to claim 3, characterized in that, There is a buffer gap between the water distribution plate and the water distribution pipe, forming a stable flow water distribution cavity.

8. The carrier belt evaporation wet film apparatus according to claim 3, characterized in that, The wet film is a stainless steel wire corrugated filler; The surface of the stainless steel wire corrugated filler is provided with multiple punches and / or punctures.

9. The carrier belt evaporation wet film apparatus according to claim 8, characterized in that, The stainless steel wire corrugated filler is fixedly connected to the outer shell by spot welding.

10. The carrier belt evaporation wet film apparatus according to claim 3, characterized in that, At least one reflux hole is provided on the bottom plate of the outer casing. The reflux hole is used to return the unevaporated waste liquid to the recovery water tank below the carrier belt evaporation wet film device.

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