An integrated falling film evaporator

Abstract

The utility model relates to evaporator technical field, the utility model provides an integrated falling film evaporator, including heating assembly, separating tank and baffle, heating assembly is equipped with liquid inlet, separating tank is located heating assembly below, just communicates with heating assembly, separating tank is equipped with the liquid outlet of located bottom and the exhaust port of located lateral wall top, the lower side of baffle and separating tank inner wall forms the liquid port between, liquid enters from liquid inlet, after heating assembly heating, through the acceptance of separating tank inner inclined baffle, through the liquid port along the inner wall of separating tank and flow to separating tank, the liquid after heating is separated with the gas generated by evaporation, makes the gas exhaust from exhaust port, liquid exports and collects from the liquid outlet, through the baffle drainage makes liquid enter separating tank bottom, ensures the liquid falling and the ascending gas to reduce contact, reduces the gas and liquid mutual enmesh, improved the concentration effect of single cycle and reduced the cycle number, to improve the work efficiency of device.

Description

Technical Field

[0001] This utility model relates to the field of evaporator technology, specifically to an integrated falling film evaporator. Background Technology

[0002] Falling film evaporators are widely used as an important liquid concentration device in many industrial fields such as chemical, food, and pharmaceutical industries. Their main principle is to allow the liquid material to form a thin film flow on the inner wall of the heat exchange tube, exchanging heat with the heating medium outside the tube. This causes the volatile components in the liquid, such as water, to evaporate, thereby concentrating the liquid material.

[0003] Existing falling film evaporators mostly employ a single-effect or multi-effect split structure. During operation, the liquid material enters from the top of the evaporator and, driven by gravity and secondary steam, forms a film-like flow along the inner wall of the heat exchange tubes, undergoing evaporation and concentration. After completing one cycle, it is discharged from the bottom. However, this type of falling film evaporator has a significant drawback: the concentration effect is poor after a single cycle, often failing to meet the concentration requirements for production.

[0004] To obtain a material with a suitable concentration, multiple concentration cycles are necessary, which significantly reduces production efficiency, greatly increases energy consumption, and raises production costs. Furthermore, during these multiple cycles, the material is exposed to high temperatures for extended periods, which can easily alter its properties and negatively impact the quality of the final product. Therefore, a device is needed that improves the concentration effect of a single cycle while reducing the number of cycles, thereby increasing the device's efficiency and ultimately improving the quality of the final product. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides an integrated falling film evaporator, which solves the technical problem in the prior art that the concentration effect of liquid is not good after a single cycle in the falling film evaporator, resulting in low concentration.

[0006] According to one aspect, at least one embodiment of the present invention provides an integrated falling film evaporator, comprising:

[0007] Heating assembly, the heating assembly having a liquid inlet;

[0008] A separation chamber is disposed below and communicates with the heating assembly. The separation chamber has a drain port at the bottom and an exhaust port at the top of the side wall.

[0009] A baffle is inclinedly disposed inside the separation chamber, and a liquid passage is formed between the lower side of the baffle and the inner wall of the separation chamber. The baffle is used to receive the heated liquid and guide the liquid to the liquid passage so that the liquid can slide down the inner wall of the separation chamber into the separation chamber.

[0010] Optionally, the area of ​​the middle cross-section of the separation box is greater than the area of ​​the upper and lower cross-sections of the separation box.

[0011] Optionally, the exhaust port is provided with an exhaust pipe, and the exhaust pipe has a flared section at one end inside the separation box with the opening facing the inner wall of the separation box.

[0012] Optionally, the heating assembly includes:

[0013] The housing has the liquid inlet located at the top of the housing.

[0014] A liquid distribution tray is disposed inside the housing and located below the liquid inlet. The liquid distribution tray has a plurality of liquid distribution holes.

[0015] The mounting plate has two mounting plates, both of which are disposed inside the housing and located below the liquid distribution plate, and are arranged vertically at intervals. The mounting plate has several mounting holes.

[0016] The heat exchange tubes are of several kinds, and the two ends of each heat exchange tube are respectively disposed in the mounting holes of two vertically arranged mounting plates.

[0017] Optional, also includes:

[0018] A circulating liquid inlet is provided through the top of the housing and is used to allow liquid that has not reached the concentration requirement to enter.

[0019] Optionally, the side wall of the housing is provided with a medium inlet for the heating medium to enter and a first outlet for the heating medium to exit.

[0020] Optionally, the sidewall of the housing may also have a second outlet.

[0021] Optionally, the housing includes:

[0022] The cylindrical body has its bottom connected to the separation box;

[0023] The upper cover is located at the top of the cylinder, and the liquid inlet and the circulating liquid inlet are both located on the upper cover.

[0024] Optional, also includes:

[0025] A liquid level detection element is disposed on the outer peripheral wall of the separation tank;

[0026] A temperature monitoring device, wherein there are a plurality of temperature monitoring devices, and the plurality of temperature monitoring devices are respectively disposed on the outer peripheral wall of the cylinder and the outer peripheral wall of the separation box;

[0027] A pressure monitoring device, wherein there are several pressure monitoring devices, and the several pressure monitoring devices are respectively disposed on the outer peripheral wall of the cylinder and the outer peripheral wall of the separation box.

[0028] Optional, also includes:

[0029] A first viewing mirror is disposed on the side wall of the upper cover;

[0030] The second viewing mirror is disposed on the outer peripheral wall of the separation box.

[0031] The beneficial effects of the embodiments of this utility model are as follows:

[0032] This invention provides an integrated falling film evaporator, comprising a heating assembly, a separation chamber, and a baffle. The heating assembly has a liquid inlet, and the separation chamber is located below and connected to the heating assembly. The separation chamber has a drain outlet at the bottom and an exhaust outlet on the top side wall. The baffle is inclined within the separation chamber, with a liquid passage between the lower side of the baffle and the inner wall of the separation chamber. The liquid to be concentrated enters through the liquid inlet, is heated by the heating assembly, is collected by the inclined baffle, and then flows into the separation chamber along the inner wall through the liquid passage. The heated liquid and the gas produced by evaporation are separated within the separation chamber; the gas is discharged through the exhaust outlet, while the desired liquid is discharged and collected through the drain outlet. The baffle's guiding effect allows the liquid to flow smoothly into the bottom of the separation chamber, effectively reducing the contact between the falling liquid and the rising gas, reducing the mutual entanglement of gas and liquid, improving the concentration effect of a single cycle, reducing the number of cycles, increasing the working efficiency of the device, and thus improving the quality of the final product. Because this device is an integrated evaporation and separation structure, it reduces personnel costs. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0034] Figure 1 This is a schematic diagram of the integrated falling film evaporator in one embodiment of the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram of the shell structure in the embodiment.

[0036] In the diagram: 1. Heating component; 101. Liquid inlet; 102. Circulating liquid inlet; 103. Medium inlet; 104. First outlet; 105. Second outlet; 11. Shell; 111. Cylinder; 112. Upper end cap; 12. Liquid distribution plate; 1201. Liquid distribution hole; 13. Mounting plate; 1301. Mounting hole; 14. Heat exchange tube; 2. Separation box; 201. Liquid outlet; 202. Exhaust port; 3. Baffle; 301. Liquid passage port; 4. Gas outlet pipe; 401. Flared section; 5. Liquid level detection element; 6. Temperature monitoring element; 7. Pressure monitoring element; 8. First observation window; 9. Second observation window; 10. Washing water return pipe. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0038] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0039] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] like Figures 1-2 The diagram illustrates an integrated falling film evaporator according to one embodiment of the present invention, comprising a heating assembly 1, a separation chamber 2, and a baffle 3. The heating assembly 1 adopts a shell-and-tube heating structure and has a cylindrical liquid inlet 101 for allowing the liquid to be concentrated to enter. The heating assembly 1 heats the entering liquid. The separation chamber 2 is a cylindrical structure, located below the heating assembly 1 and connected to the bottom of the heating assembly 1. A drain port 201 is provided at the bottom of the separation chamber 2 for discharging the concentrated liquid from the separation chamber 2. This facilitates the subsequent collection of liquid that meets the concentration requirements; and an exhaust port 202 is provided on the top of the side wall of the separation tank 2. The exhaust port 202 is used to discharge the gas generated by evaporation from the separation tank 2, avoiding the problem that the concentrated liquid and gas will mix together, causing some liquid to be mixed into the gas, resulting in a low required liquid concentration; the baffle 3 is inclinedly set inside the separation tank 2, and the lower side of the baffle 3 forms a liquid passage port 301 between it and the inner wall of the separation tank 2. Under the guidance of the baffle 3, the liquid flows to the liquid passage port 301, and then flows out from the liquid passage port 301 and slides down the inner wall of the separation tank 2 into the separation tank 2.

[0044] It should be noted that by adding baffle 3, the heated liquid can fall onto baffle 3 and then slowly flow down through liquid outlet 301 along the inclined direction of baffle 3, and gently flow down the inner wall of separation tank 2 to the bottom of separation tank 2. This avoids the problem of liquid flowing down directly and hitting the bottom of separation tank 2, ensuring that the liquid will not splash up, and thus will not carry the rising gas into the liquid at the bottom of separation tank 2, reducing the bubble content in the liquid at the bottom of separation tank 2, thereby improving the liquid concentration effect of a single cycle.

[0045] For example, such as Figure 1As shown, in some examples, the cross-sectional area of ​​the middle section of the separation chamber 2 is larger than the cross-sectional areas of the upper and lower sections. Specifically, the diameter of the middle section of the separation chamber 2 is larger than the diameter of the upper and lower sections. This is because the heated liquid continuously evaporates into gas, which needs to exit the separation chamber 2 while the liquid flows back into it for further concentration. The increased area in the middle section allows for temporary storage of more evaporated gas during the evaporation process, preventing congestion when the gas exits from the top. With the assistance of the baffle 3, the falling liquid flows down one inner wall, and the rising gas exits from the other side, reducing interference between the rising gas and the falling liquid and ensuring the stable operation of the gas-liquid separation and liquid concentration processes. Simultaneously, it reduces the amount of liquid carried by the gas, lowers liquid loss, and improves the efficiency of the device.

[0046] It should be noted that the baffle 3, together with the large space in the middle of the separation box 2, ensures that the liquid hardly comes into contact with the rising gas when it falls, thus avoiding the problem of the gas carrying away some of the liquid and reducing the amount of liquid lost in a single cycle. At the same time, it also avoids the problem of the liquid blocking the rising gas from being discharged when it falls, which would result in some gas remaining in the liquid and causing a low liquid concentration.

[0047] For example, such as Figure 1 As shown, an exhaust pipe 4 is provided inside the exhaust port 202 of the separator 2. The exhaust pipe 4 is located inside the separator 2, and one end of the exhaust pipe 4 has a flared section 401 with the opening facing the inner wall of the separator 2. Specifically, the air inlet of the flared section 401 of the exhaust pipe 4 is set in a "trumpet shape" and faces the inner wall of the separator 2. During the flow process, the gas will be discharged along the direction of the inner wall of the separator 2, reducing the direct impact on the liquid in the separator 2. The design of the flared section 401 of the exhaust pipe 4 and the opening facing the inner wall of the separator 2 avoid the violent disturbance of the liquid in the separator 2 when the gas is discharged, reduce the amount of liquid carried out by the gas, improve the gas-liquid separation effect, and thus enhance the concentration effect of a single cycle.

[0048] For example, such as Figure 2As shown, the heating assembly 1 includes a housing 11, a liquid distribution plate 12, a mounting plate 13, and heat exchange tubes 14. Specifically, the housing 11 of the heating assembly 1 is cylindrical, with the liquid inlet 101 located at the top of the housing 11. A circular liquid distribution plate 12 matching the inner diameter of the housing 11 is provided inside the housing 11 and is located below the liquid inlet 101. The liquid distribution plate 12 has several liquid distribution holes 1201. Two mounting plates 13 are provided at the top and bottom of the housing 11. The two mounting plates 13 are circular plates matching the inner diameter of the housing 11 and are both located below the liquid distribution plate 12. Several mounting holes 1301 are provided on the mounting plates 13. Several heat exchange tubes 14 are vertically arranged between the two mounting plates 13, and each pair of mounting holes 1301 on the two mounting plates 13 corresponds vertically. A heat exchange tube 14 is vertically fixed between each pair of mounting holes 1301.

[0049] It should be noted that the liquid to be concentrated flows into the liquid distribution plate 12 through the liquid inlet 101, and flows evenly onto the mounting plate 13 through several liquid distribution holes 1201 on the liquid distribution plate 12. It then flows into the heat exchange tube 14 along the mounting holes 1301. When the liquid flows in the heat exchange tube 14, it exchanges heat with the heating medium outside the heat exchange tube 14. Then, the heated liquid flows into the baffle 3 through the heat exchange tube 14, and flows down the side wall of the separation box 2 along the inclined direction of the baffle 3, and flows gently into the bottom of the separation box 2.

[0050] During this process, the liquid distribution holes 1201 of the liquid distribution plate 12 can evenly distribute the liquid to each heat exchange tube 14, ensuring that the liquid is fully heated in each heat exchange tube 14, thus improving heating efficiency and uniformity. The arrangement of multiple heat exchange tubes 14 increases the heat exchange area, allowing the liquid to fully evaporate within the heating assembly 1, thereby improving the concentration effect of a single cycle. The baffle 3 effectively solves the problem of liquid splashing caused by the falling liquid impacting the bottom of the separation tank 2, preventing the rising gas from being re-entrained into the liquid at the bottom of the separation tank 2. At the same time, it also solves the problem of some liquid droplets being carried away by the rising gas, thereby reducing the amount of liquid lost during a single heating and separation process.

[0051] For example, such as Figure 1As shown, in some examples, the integrated falling film evaporator also includes a circulating liquid inlet 102; the circulating liquid inlet 102 is located at the top of the shell 11; specifically, a switching valve is connected to the drain port 201 of the separation tank 2. This switching valve can be a three-way valve, a ball valve, or a gate valve, etc., which is not limited here; the switching valve can be used to allow the liquid that meets the concentration requirements to flow to the subsequent collection device, or the liquid that does not meet the concentration requirements to flow to the circulating liquid inlet 101 to continue the circulation and concentration process until the required concentration requirements are met. The circulating liquid inlet 102 is located at the top of the shell 11 and works in conjunction with the switching valve at the drain port 201 of the separation tank 2. The flow direction of the liquid can be flexibly controlled by the valve. When the liquid meets the concentration requirements, it is directly introduced into the subsequent collection device. When it does not meet the requirements, it is switched to the circulating liquid inlet 102 to re-enter the system for further concentration. This measure can accurately ensure that the product concentration meets the requirements and avoid the discharge of unqualified materials; at the same time, there is no need for additional equipment to transfer the unqualified liquid, which simplifies the circulation process, reduces material loss and energy waste, significantly improves the flexibility and efficiency of the concentration operation, and meets the production scenarios with different concentration requirements.

[0052] For example, such as Figure 2 As shown, the side wall of the shell 11 has an inlet for the heating medium to enter, and a first outlet 104 and a second outlet 105 for the heating medium to exit. The heating medium enters the gap between the shell 11 and the heat exchange tube 14 through the medium inlet 103. During its flow inside the shell 11, it exchanges heat with the liquid in the heat exchange tube 14, releases heat, and is then discharged from the first outlet 104 to be recycled into the external heating medium. It should be noted that the medium inlet 103 continuously supplies heating medium into the shell 11 to ensure efficient heat exchange within the shell 11. There are two first outlets 104, which are respectively located above and below the medium inlet 103. Both first outlets 104 are used to discharge non-condensable heating medium. As the heating medium continuously releases heat, its temperature gradually decreases. When the temperature has not yet dropped to the "condensation point", the non-condensable heating medium is in a gaseous state. If the non-condensable heating medium accumulates in the shell 11, it will occupy the heat exchange space and reduce the heat transfer efficiency. Therefore, two first outlets 104 are provided to discharge the non-condensable heating medium, ensuring that the shell 11 is always filled with a highly efficient heat exchange heating medium, thereby ensuring the heating efficiency and concentration effect of the liquid.

[0053] The second outlet 105 is located below the first outlet 104. The second outlet 105 is used to discharge the condensed heating medium. As the heating medium continuously releases heat, its temperature gradually decreases. When the temperature drops to the "condensation point", it will change from a gaseous state to a liquid state. Therefore, some of the heating medium will turn into a liquid state. If it is not discharged in time, it will mix into the heated liquid, affecting the liquid concentration and reducing the heat transfer efficiency. Therefore, the second outlet 105 improves the heating efficiency of the liquid and ensures the concentration of the liquid.

[0054] For example, such as Figure 2 As shown, the shell 11 includes a cylindrical body 111 and an upper cover. The bottom of the cylindrical body 111 is connected to the separation tank 2, and the liquid distribution plate 12, mounting plate 13, and heat exchange tube 14 are all disposed inside the cylindrical body 111. The upper cover is disposed at the top of the cylindrical body 111, and the liquid inlet 101 and the circulating liquid inlet 102 are both located at the top of the upper cover. Specifically, the components arranged from top to bottom are, in order, the liquid inlet 101 and the circulating liquid inlet 102, the liquid distribution plate 12, the upper mounting plate 13, the heat exchange tube 14, and the lower mounting plate 13. The shell 11 adopts a split structure of the cylindrical body 111 and the upper cover 112, which facilitates processing, manufacturing, installation, and maintenance. The design of the upper cover 112 is conducive to the flow and distribution of liquid, reduces the liquid flow resistance, ensures that the liquid can smoothly enter the heating component 1, and improves the operating stability and working efficiency of the device.

[0055] For example, such as Figure 1 As shown, in some examples, the integrated falling film evaporator also includes a liquid level detection element 5, a temperature monitoring element 6, and a pressure monitoring element 7. Specifically, the liquid level detection element 5 is located on the outer peripheral wall of the separation tank 2. The liquid level detection element 5 in this device uses a dual-flange differential pressure transmitter. Both flanges are wall-mounted flanges and are located in the middle and lower part of the separation tank 2, respectively. There is a certain height difference between the two flanges. By measuring the pressure difference between the two different positions and converting this differential pressure signal into a standard electrical signal output, the liquid level in the separation tank 2 can be measured, avoiding the problem of the liquid level in the separation tank being too high or too low. The wall-mounted flanges are completely flush with the inner wall of the lower tube box and have a smooth transition without any protrusions or depressions. The liquid can flow smoothly along the wall surface, ensuring that the pressure difference can truly reflect the liquid level change and that the measurement accuracy is stable over a long period of time.

[0056] There are three temperature monitoring devices 6: one on the outer peripheral wall of the cylinder 111 and two on the outer peripheral wall of the separation tank 2. The temperature monitoring device 6 on the outer peripheral wall of the cylinder 111 is used to monitor the temperature inside the cylinder 111, reducing the impact of abnormal temperature on the heating of the liquid on the heat exchange tube 14. The one on the outer peripheral wall of the separation tank 2 is used to monitor the temperature of the separation tank 2, reducing the possibility of low liquid quality caused by abnormal temperature, and preventing abnormal temperature from posing a danger to the device and operators. There are two pressure monitoring devices 7, one on the outer peripheral wall of the cylinder 111 and the other on the outer peripheral wall of the separation tank 2. The pressure monitoring devices 7 are used to monitor the pressure inside the cylinder 111 and the separation tank 2, reducing the probability of abnormal pressure posing a danger to the device and operators.

[0057] It should be noted that by analyzing the trends in monitoring data, such as a continuous rise in temperature or increased pressure fluctuations, potential faults can be detected in advance, allowing for repairs to be carried out before the equipment completely fails, reducing unplanned downtime losses and extending equipment life.

[0058] For example, such as Figure 1 As shown, in some examples, the integrated falling film evaporator also includes a first observation window 8 and a second observation window 9. The first observation window 8 is located on the upper end cap 112, and the second observation window 9 is located on the outer peripheral wall of the separation tank 2. Operators can observe the liquid distribution within the shell 11 and the working status of the heat exchange tubes 14 through the first observation window 8, and observe the liquid flow, evaporation, and liquid level within the separation tank 2 through the second observation window 9. The placement of the first observation window 8 and the second observation window 9 allows operators to intuitively understand the internal working conditions of the device, promptly identify problems such as uneven liquid distribution and equipment malfunctions, and take timely action, ensuring the normal operation of the device and improving product quality and production efficiency.

[0059] For example, such as Figure 1 As shown, the integrated falling film evaporator is also equipped with a gas washing water return pipe 10. The gas washing water return pipe 10 includes a gas washing component and a return pipe. The gas washing component is connected to the end of the gas outlet pipe 4 of the exhaust port 202. The gas washing component is equipped with a spray structure. One end of the return pipe is connected to the bottom of the gas washing component, and the other end is connected to the separation box 2. A control valve is provided on the return pipe.

[0060] Gas discharged from exhaust port 202 enters the gas scrubbing assembly, where a spray structure sprays scrubbing water to wash the gas. Small amounts of liquid material carried in the gas are captured and mixed by the scrubbing water to form a mixture. Under gravity, the mixture collects at the bottom of the gas scrubbing assembly and flows back into the separation tank 2 through a return pipe, controlled by a valve, to participate in the evaporation and concentration process again. The scrubbing water return pipe 10 can recover liquid droplets carried in the gas, reducing liquid loss and improving liquid utilization. Simultaneously, the scrubbed gas is purer, facilitating subsequent processing. The returned mixture re-participates in evaporation, increasing the concentration opportunities for the material in a single cycle, further improving the concentration effect of a single cycle, reducing the number of cycles, lowering energy consumption, and ensuring product quality.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An integrated falling film evaporator, characterized in that, include: Heating assembly (1), the heating assembly (1) having a liquid inlet (101); Separation box (2), the separation box (2) is located below the heating component (1) and communicates with the heating component (1), the separation box (2) is provided with a drain port (201) at the bottom and an exhaust port (202) at the top of the side wall. A baffle (3) is inclinedly disposed inside the separation box (2). A liquid outlet (301) is formed between the lower side of the baffle (3) and the inner wall of the separation box (2). The baffle (3) is used to receive the heated liquid and guide the liquid to the liquid outlet (301) so that the liquid can slide down the inner wall of the separation box (2) into the separation box (2).

2. The integrated falling film evaporator according to claim 1, characterized in that, The area of ​​the middle cross section of the separation box (2) is greater than the area of ​​the upper and lower cross sections of the separation box (2).

3. The integrated falling film evaporator according to claim 2, characterized in that, The exhaust port (202) is provided with an exhaust pipe (4), which is located inside the separation box (2) and has a flared section (401) at one end with the opening facing the inner wall of the separation box (2).

4. The integrated falling film evaporator according to claim 1, characterized in that, The heating assembly (1) includes: The housing (11) has the liquid inlet (101) located at the top of the housing (11); Liquid distribution plate (12) is disposed inside the housing (11) and located below the liquid inlet (101). The liquid distribution plate (12) has a plurality of liquid distribution holes (1201). Mounting plate (13), there are two mounting plates (13), both mounting plates (13) are disposed inside the housing (11), both mounting plates (13) are located below the liquid distribution plate (12) and are arranged vertically at intervals, and a plurality of mounting holes (1301) are provided on the mounting plate (13). Heat exchange tube (14), there are several heat exchange tubes (14), and the two ends of each heat exchange tube (14) are respectively disposed in the mounting holes (1301) of the two mounting plates (13).

5. The integrated falling film evaporator according to claim 4, characterized in that, The top of the housing (11) is provided with a circulating liquid inlet (102).

6. The integrated falling film evaporator according to claim 5, characterized in that, The side wall of the housing (11) is provided with a medium inlet (103) for the heating medium to enter and a first outlet (104) for the heating medium to exit.

7. The integrated falling film evaporator according to claim 6, characterized in that, The side wall of the housing (11) is also provided with a second outlet (105).

8. An integrated falling film evaporator according to claim 7, characterized in that, The housing (11) includes: The bottom of the cylindrical body (111) is connected to the separation box (2); The upper end cap (112) is located on the top of the cylinder (111), and the liquid inlet (101) and the circulating liquid inlet (102) are both located on the upper end cap (112).

9. An integrated falling film evaporator according to claim 8, characterized in that, Also includes: Liquid level detection element (5), the liquid level detection element (5) is disposed on the outer peripheral wall of the separation tank (2); Temperature monitoring element (6), there are a plurality of temperature monitoring elements (6), and the plurality of temperature monitoring elements (6) are respectively disposed on the outer peripheral wall of the cylinder (111) and the outer peripheral wall of the separation box (2); Pressure monitoring element (7), there are several pressure monitoring elements (7), and several pressure monitoring elements (7) are respectively disposed on the outer peripheral wall of the cylinder (111) and the outer peripheral wall of the separation box (2).

10. An integrated falling film evaporator according to claim 9, characterized in that, Also includes: The first observation window (8) is disposed on the upper end cap (112); The second observation window (9) is located on the outer peripheral wall of the separation box (2).

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