Integrated vertical falling film evaporator device

Abstract

The utility model relates to an integrated vertical falling film evaporator device, including cylinder, water distribution plate distributor, heat exchange pipe and silk screen demister, the cylinder is hollow cylindrical structure, the water distribution plate distributor is diamond structure, and the water distribution plate distributor sets up inside the cylinder, and the bottom of water distribution plate distributor is provided with upper tube sheet, the heat exchange pipe is the hollow cylindrical structure of two ends opening, and the top of heat exchange pipe is connected with the bottom of upper tube sheet, the silk screen demister is cylindrical net structure, and the silk screen demoser sets up inside the cylinder. Through water distribution plate distributor accurate liquid distribution, cooperate heat exchange pipe high -efficient heat transfer, again through silk screen demoser separation gas -liquid, according to the integrated vertical falling film evaporator device of the application embodiment can effectively promote material liquid distribution uniformity and heat exchange efficiency, reduce steam liquid problem, guarantee evaporation concentration effect, adapt to the continuous processing demand of industrial wastewater scene etc.

Description

Technical Field

[0001] This utility model relates to the field of zero discharge of industrial wastewater, and in particular to an integrated vertical falling film evaporator device. Background Technology

[0002] There are currently two types of falling film evaporators: separate and integrated. Separate falling film evaporators are limited in their application in industrial wastewater treatment due to their complex structure, large footprint, and high investment costs. This paper aims to overcome the shortcomings of separate falling film evaporators, which are difficult to maintain and replace in industrial wastewater treatment due to their complex structure, numerous components, and cumbersome installation, and to provide an evaporator that is easy to maintain and replace and adaptable to industrial wastewater treatment scenarios. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an integrated vertical falling film evaporator device, including a cylinder, a water distribution plate distributor, heat exchange tubes, and a wire mesh demister. The cylinder body has a hollow cylindrical structure; The water distribution plate distributor has a rhomboid structure and is located inside the cylinder. An upper tube plate is installed at the bottom of the water distribution plate distributor. The heat exchange tube is a hollow cylindrical structure with openings at both ends, and the top of the heat exchange tube is connected to the bottom of the upper tube sheet. The wire mesh demister has a cylindrical mesh structure and is installed inside the cylinder.

[0004] In one embodiment of the utility model, the water distribution plate distributor includes an upper water distribution plate and a lower water distribution plate, with the lower water distribution plate disposed below the upper water distribution plate.

[0005] In one embodiment of the utility model, the opening position on the upper water distribution plate matches the opening position on the upper pipe plate.

[0006] In one embodiment of the utility model, the openings of the lower water distribution plate are arranged around the upper tube sheet and the heat exchange tube, with at least 6 small holes surrounding each heat exchange tube opening.

[0007] In one embodiment of the utility model, the thickness of the wire mesh demister ranges from 100 to 300 mm.

[0008] In one embodiment of the utility model, the cylinder includes a first cylinder, a second cylinder, and a third cylinder. The first cylinder is a cylindrical structure with an open top and tapered sides with varying diameters. The bottom of the first cylinder is an arc-shaped structure. The second cylinder is a cylindrical structure with open top and bottom. The bottom of the second cylinder penetrates the top of the first cylinder and is disposed inside the first cylinder. The top of the second cylinder is an inclined bevel structure. The third cylinder is a cylindrical structure with open top and bottom. The bottom of the third cylinder is provided with a guide tube with a polygonal annular structure with open top and bottom. A steam inlet is provided on the left side of the guide tube. The top of the second cylinder penetrates the bottom of the guide tube and is disposed inside the guide tube. The water distribution plate is installed inside the third cylinder; The heat exchange tubes are installed throughout the interior of the second cylinder, the guide tube, and the third cylinder; The wire mesh demister is located between the inner wall of the first cylinder and the bottom exterior of the second cylinder.

[0009] In one embodiment of the utility model, a first through hole is provided at the bottom of the first cylinder, an anti-vortex baffle is provided inside the first cylinder, the anti-vortex baffle is located at the center of the bottom of the first cylinder, and a secondary steam outlet is provided at the top of the first cylinder at a variable diameter angle, the secondary steam outlet is located on the right side of the first cylinder.

[0010] In one embodiment of the utility model, a lower tube sheet is provided inside the second cylinder, and the lower tube sheet is located above the top diameter change angle of the first cylinder, with the top of the lower tube sheet connected to the bottom of the heat exchange tube.

[0011] In one embodiment of the utility model, the top of the third cylinder is provided with an arc-shaped end cap, and the top of the end cap is provided with a sight glass. The interior of the third cylinder is provided with a water distribution pipe and a shaft hanger. The water distribution pipe is located between the end cap and the upper water distribution plate, and the shaft hanger is located between the upper tube plate and the guide tube. The third cylinder has a manhole and a circulating material inlet. The manhole is circular and is located between the water distribution pipe and the upper water distribution plate. The circulating material inlet is connected to the water distribution pipe.

[0012] In one embodiment of the utility model, the integrated vertical falling film evaporator device further includes a skirt base, which is a cylindrical structure with an open top. The bottom of the first cylinder penetrates the top of the skirt base and is located inside the skirt base. An outlet pipe is provided inside the skirt base. The outlet pipe is an L-shaped cylindrical structure. One end of the outlet pipe penetrates the first through hole of the first cylinder and is connected to an anti-vortex baffle. An elliptical inspection hole and a second through hole are provided on the skirt base. The second through hole is located on the bottom right side of the skirt base. The other end of the outlet pipe penetrates the second through hole and is located inside the skirt base.

[0013] The beneficial effects of this utility model are: This integrated vertical falling film evaporator unit features a hollow cylindrical structure. Its regular geometry ensures a more uniform internal flow field, providing stable space for liquid evaporation and vapor-liquid flow. This facilitates process piping connections and equipment installation, ensuring the overall compactness and operational stability of the unit. The water distributor employs a rhomboid structure in conjunction with the bottom upper tube sheet. The rhomboid configuration optimizes the liquid distribution path, and combined with precise alignment of the upper tube sheet with the heat exchange tubes, allows for more even distribution of the liquid to each tube, improving the falling film effect and heat exchange efficiency. This avoids localized dry walls and fluctuations in heat exchange efficiency caused by uneven liquid distribution. The tube is designed as a hollow cylindrical structure with openings at both ends, and the top is connected to the bottom of the upper tube sheet. This structure allows the liquid to form a continuous liquid film inside the tube, increasing the heat transfer area and facilitating the co-flow of vapor and liquid, thus enhancing the heat and mass transfer process and improving the evaporation and concentration efficiency. The wire mesh demister is designed as a cylindrical mesh structure and placed inside the cylinder. The cylindrical configuration is adapted to the cylinder space, and the mesh structure can efficiently intercept liquid droplets entrained in the secondary steam, significantly reducing the amount of liquid carried by the steam, ensuring the stability of subsequent processes, and improving the vapor-liquid separation effect. Through structural collaboration, the various components jointly optimize the evaporation and separation performance of the device, adapting to the needs of scenarios such as industrial wastewater treatment.

[0014] Other features and aspects of the present invention will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0016] Figure 1 This diagram shows the main structure of an integrated vertical falling film evaporator device according to an embodiment of the present invention. Figure 2 This diagram shows the structure of the water distribution plate distributor according to an embodiment of the present invention. Detailed Implementation Various exemplary embodiments, features, and aspects of the present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0017] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0020] Furthermore, to better illustrate this utility model, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this utility model can be implemented even without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail, in order to highlight the main points of this utility model.

[0021] This utility model relates to an integrated vertical falling film evaporator device for industrial wastewater, which is a highly efficient evaporation and separation equipment. It is applied in the field of zero-discharge treatment of industrial wastewater, and plays a role in evaporating and concentrating industrial wastewater to achieve water resource recycling. At the same time, it efficiently separates liquid droplets entrained in secondary steam to ensure steam quality.

[0022] Specific references Figure 1 As a specific embodiment of the integrated vertical falling film evaporator device of this utility model, the integrated vertical falling film evaporator device includes a cylinder 110, a water distribution plate distributor 120, a heat exchange tube 130, and a wire mesh demister 140. The integrated vertical falling film evaporator device is mainly composed of the cylinder 110, the water distribution plate distributor 120, the heat exchange tube 130, and the wire mesh demister 140.

[0023] The cylinder 110 is a hollow cylindrical structure, serving as the main frame of the entire evaporator and providing a regular and stable internal space. This shape ensures a relatively regular flow path for the internal fluids, facilitating the uniform distribution and flow of liquid and steam within the cavity. This effectively reduces flow resistance and localized turbulence, ensuring the stability of the device during operation. Furthermore, the cylindrical structure is relatively simple to manufacture, facilitating processing and assembly, and also aids in connection and integration with other equipment components. The cylindrical shape also offers reasonable space utilization and is suitable for installation and use in industrial settings.

[0024] Furthermore, such as Figure 1 As shown, the cylinder 110 is a vertically placed hollow cylinder, serving as the main frame of the equipment. Its inner wall is smooth and has a uniform diameter, providing a regular space for the evaporation of the liquid and the flow of steam. The top and bottom openings connect to different components respectively. The cylindrical shape ensures a uniform internal flow field, avoiding local turbulence from affecting the evaporation efficiency. It also facilitates coaxial installation with components such as the heat exchange tube 130 and the wire mesh demister 140, ensuring a compact overall structure.

[0025] The water distributor 120 has a rhomboid structure and is located inside the cylinder 110. An upper tube plate 150 is located at the bottom of the water distributor 120. The rhomboid structure of the water distributor 120 provides unique fluid distribution characteristics; its special geometry alters the flow direction and velocity distribution of the liquid, making it easier to evenly disperse the liquid after it enters the distributor. Placing it inside the cylinder 110 allows for efficient use of the space within the cylinder for proper liquid distribution. The upper tube plate 150 at the bottom provides support and positioning. It works closely with the water distributor 120, providing structural support and allowing the openings on the upper tube plate 150 to correspond to the heat exchange tubes 130, precisely guiding the liquid flowing from the water distributor 120 into the heat exchange tubes 130. This ensures uniform liquid film distribution on each heat exchange tube 130, laying the foundation for subsequent efficient heat exchange processes.

[0026] Furthermore, such as Figure 2 As shown, the water distributor 120 is a rhomboid plate, horizontally installed on the upper part of the cylinder 110. Its four beveled edges have gaps with the inner wall of the cylinder 110 to facilitate uniform diffusion of the liquid. The upper tube plate 150 at the bottom is a circular plate, welded and fixed to the water distributor 120. The openings on the upper tube plate 150 correspond one-to-one with the heat exchange tubes 130 below. The liquid flows in from the top of the water distributor 120, is diverted by the rhomboid edges, and is precisely guided into the heat exchange tubes 130 through the holes in the upper tube plate 150, forming a uniform liquid film.

[0027] The heat exchange tube 130 is a hollow cylindrical structure with openings at both ends. The top of the heat exchange tube 130 is connected to the bottom of the upper tube sheet 150. This hollow cylindrical heat exchange tube 130 with openings at both ends is the core component of the evaporator for heat transfer. This structure allows the liquid to enter from one end, forming a liquid film on the inner wall of the tube. Simultaneously, steam flows outside or inside the tube, exchanging heat through the tube wall, and the liquid film evaporates and vaporizes. The open-end design ensures the flow path of the liquid and steam, facilitating continuous material processing. The connection between the top of the heat exchange tube 130 and the bottom of the upper tube sheet 150 ensures stable installation and accurate positioning of the heat exchange tube 130, allowing the liquid distributed by the water distributor 120 to accurately flow into each heat exchange tube 130. This guarantees the continuity and efficiency of heat exchange throughout the evaporation process. This connection method also facilitates the installation, maintenance, and repair of the equipment.

[0028] Furthermore, such as Figure 1 As shown, the heat exchange tubes 130 are arranged vertically, with their upper ends inserted into the holes of the upper tube sheet 150 and welded in place, and their lower ends extending to the lower part of the cylinder 110, connecting to the lower tube sheet 160. The hollow design of the tube body allows the liquid to form a film and flow on the inner wall of the tube, while the outer wall contacts the steam for heat transfer. Multiple heat exchange tubes 130 are evenly distributed below the upper tube sheet 150, forming a dense heat transfer surface. Steam enters from the side inlet of the cylinder 110, flows around the outer wall of the heat exchange tubes 130, and transfers heat to the liquid film inside the tube through the tube wall, causing it to evaporate and vaporize.

[0029] The wire mesh demister 140 is a cylindrical mesh structure installed inside the cylinder 110. The cylindrical mesh structure of the demister 140 is adapted to the shape of the inner wall of the cylinder 110, effectively covering the flow area of ​​secondary steam and maximizing the interception of liquid droplets entrained in the steam. Its mesh structure is woven from fine filaments, possessing a large specific surface area and complex pore structure. When secondary steam containing droplets passes through, the droplets adhere to the wire mesh due to inertial collisions and diffusion, and then gather and drip back into the cylinder 110 under gravity, thus achieving vapor-liquid separation. Installing it inside the cylinder 110 allows for purification of the steam before it exits the equipment, preventing droplets from entering subsequent equipment with the steam, avoiding impact on subsequent processes, and ensuring the stable operation of the entire evaporation system and product quality.

[0030] Furthermore, such as Figure 1 As shown, the wire mesh demister 140 is located on the upper part of the cylinder 110, and is in the shape of a cylindrical mesh tube. The outer wall is tightly attached to the inner wall of the cylinder 110, and there is a space between the inner wall and the outer edge of the heat exchange tubes 130. It can maximally prevent the secondary steam generated during evaporation from carrying liquid droplets into the downstream equipment. When separating mist droplets with a particle size greater than 16μm, the demisting efficiency is ≥99.2%. It has the characteristics of good demisting effect, low operating cost, small footprint, simple structure, good separation effect, and low investment cost.

[0031] In this embodiment, the water distribution plate distributor 120 includes an upper water distribution plate 121 and a lower water distribution plate 122. The lower water distribution plate 122 is disposed below the upper water distribution plate 121. During manufacturing, the opening position of the upper water distribution plate 121 is consistent with the opening position of the upper tube plate 150, and the hole diameter range is ∅8~∅40mm. The opening position of the lower water distribution plate is arranged around the heat exchange tubes 130 of the upper tube plate 150. Each heat exchange tube 130 opening corresponds to 6 small holes surrounding it, and the hole diameter range is ∅4~∅40mm.

[0032] In this embodiment, the opening positions on the upper water distribution plate 121 match the opening positions on the upper tube plate 150. Before equipment assembly, the upper tube plate 150 and the upper water distribution plate 121 are uniformly positioned and calibrated. A three-dimensional coordinate measuring machine is used to accurately obtain the center coordinates of each opening in the upper tube plate 150. The data is imported into the laser cutting machine control system, and openings are precisely cut on the stainless steel upper water distribution plate 121 according to the coordinates, diameter, and shape of the openings in the upper tube plate 150. After the openings are completed, the upper water distribution plate 121 and the upper tube plate 150 are initially positioned using dedicated positioning pins, and then bolts are used for fastening. A high-temperature resistant sealing gasket is also installed between the two to ensure a tight connection and prevent liquid leakage. This precisely matched perforation design ensures that the liquid distributed by the water distributor 120 flows into the heat exchange tubes 130 without deviation, improving the uniformity of liquid distribution and evaporation efficiency. The precise matching of the perforation positions of the upper water distributor 121 and the upper tube plate 150 ensures that the liquid flows directly into the heat exchange tubes via the shortest path and with minimal resistance after exiting the upper water distributor 121, avoiding problems such as liquid splashing, flow deviation, or uneven distribution caused by misaligned perforations. This design ensures that the initial flow rate and distribution state of the liquid in each heat exchange tube 130 are highly consistent, thereby guaranteeing a uniform liquid film thickness in each heat exchange tube 130, effectively improving the overall heat exchange efficiency, reducing heat transfer failures caused by localized dry walls or excessively thick liquid films, and ensuring stable and efficient operation of the evaporator.

[0033] In this embodiment, the openings of the lower water distribution plate 122 are arranged around the upper tube sheet 150 and the heat exchange tubes 130. Each heat exchange tube 130 opening is surrounded by at least six small holes. Based on the actual installation positions of the upper tube sheet 150 and the heat exchange tubes 130, the opening layout of the lower water distribution plate 122 is simulated in the software to ensure that at least six small holes are evenly distributed around each heat exchange tube 130 opening. During processing, a high-precision CNC drilling machine is used. The path and depth of the drill bit are controlled by programming to drill small holes with diameters of ∅4~∅40mm in the 8~10mm thick stainless steel lower water distribution plate 122. After drilling, the lower water distribution plate 122 is surface polished to reduce the resistance to liquid flow. During equipment installation, the lower water distribution plate 122 is installed below the upper water distribution plate 121, ensuring that the holes in the lower water distribution plate 122 precisely correspond to the positions of the upper water distribution plate 121 and the heat exchange tubes 130. This guarantees that the liquid is evenly distributed to the inner wall of each heat exchange tube 130 through the holes, forming a stable falling film flow and improving the evaporation effect. The lower water distribution plate 122 is arranged around the upper tube sheet 150 and the heat exchange tubes 130, with at least 6 holes corresponding to each heat exchange tube 130 opening. Through this multi-pore dispersion design, the liquid can be further refined and evenly distributed. Compared to direct feeding through a single hole, multiple holes allow the liquid to spread evenly along the circumference of the inner wall of the heat exchange tubes 130, forming a thinner and more stable liquid film, significantly increasing the contact area between the liquid film and the tube wall, and enhancing the heat transfer effect. At the same time, the dispersed hole layout reduces the kinetic energy of the liquid impacting the tube wall, reduces liquid film disturbance, and avoids a decrease in evaporation efficiency due to liquid film rupture, ensuring that the evaporator can achieve efficient and stable operation under different flow conditions.

[0034] In this embodiment, the thickness of the wire mesh demister 140 ranges from 100 to 300 mm. During the manufacturing of the wire mesh demister 140, the thickness is selected within this range based on actual operating conditions. When the industrial wastewater being treated easily generates fine mist and requires high steam purity, a wire mesh demister 140 with a thickness of 250 to 300 mm is selected; if the material being treated has larger mist particles and is easier to separate, a wire mesh demister 140 with a thickness of 100 to 150 mm is selected. The wire mesh material is made of 316L stainless steel wire, and a cylindrical mesh structure of the required thickness is formed through multi-layer overlapping and weaving. Each layer of wire mesh is stitched and fixed together using high-temperature resistant stainless steel wire to ensure a tight wire mesh structure. During installation, the wire mesh demister 140 is placed on the annular support structure between the inner wall of the first cylinder 111 and the outer bottom of the second cylinder 112, and fixed with bolts and pressure plates to ensure stable and reliable operation of the wire mesh demister 140 during equipment operation. It effectively intercepts droplets in secondary steam. Controlling the thickness of the wire mesh demister 140 between 100 and 300 mm achieves an optimal balance between interception efficiency and flow resistance. Thinner wire mesh is suitable for conditions with larger droplet sizes and lower mist content, effectively separating droplets while reducing pressure loss during steam passage and minimizing energy consumption. Thicker wire mesh is suitable for handling steam containing fine mist that is difficult to separate. By increasing the number of wire mesh layers and the interception path, the ability to capture tiny droplets is enhanced, ensuring a separation efficiency ≥99.2%. Furthermore, this thickness range facilitates manufacturing, installation, and maintenance, ensuring structural strength while avoiding problems such as excessive equipment size and increased costs due to excessive thickness.

[0035] In this embodiment, the cylindrical body 110 includes a first cylindrical body 111, a second cylindrical body 112, and a third cylindrical body 113. The first cylindrical body 111 is a cylindrical structure with an open top and tapered sides at a diameter angle of 002. The bottom of the first cylindrical body 111 is an arc-shaped structure. The second cylindrical body 112 is a cylindrical structure with open top and bottom. The bottom of the second cylindrical body 112 penetrates the top of the first cylindrical body 111 and is disposed inside the first cylindrical body 111. The top of the second cylindrical body 112 is an inclined bevel structure. The third cylindrical body 113 is a cylindrical structure with open top and bottom. The bottom of the third cylindrical body 113 is provided with a polygonal ring with open top and bottom. The first cylinder 111 has a shaped guide tube 180, and a steam inlet 003 is provided on the left side of the guide tube 180. The top of the second cylinder 112 passes through the bottom of the guide tube 180 and is located inside the guide tube 180. The water distribution plate distributor 120 is located inside the third cylinder 113. The heat exchange tube 130 passes through the interior of the second cylinder 112, the guide tube 180 and the third cylinder 113. The wire mesh demister 140 is located between the inner wall of the first cylinder 111 and the bottom exterior of the second cylinder 112. The first cylinder 111, the second cylinder 112 and the third cylinder 113 are all made of high-quality carbon steel and are formed into cylindrical shapes by rolling them with a plate rolling machine and then welding them together. The first cylinder 111 has an opening at the top for mounting the second cylinder 112. Both sides are formed with a tapered structure and a diameter change angle 002 through stamping, with the diameter change angle 002 ranging from 0 to 30°. The bottom is formed with an arc-shaped structure using a mold. The top of the second cylinder 112 is machined into an inclined bevel structure to facilitate secondary steam flow. The bottom of the third cylinder 113 is welded with a polygonal annular guide tube 180, with a steam inlet 003 on the left side of the guide tube 180. During assembly, the bottom of the second cylinder 112 is first inserted into the top of the first cylinder 111 and fixed by welding and flange connection. Then, the guide tube 180 of the third cylinder 113 is fitted onto the top of the second cylinder 112, also using welding and flange connection. The water distributor 120 is installed inside the upper part of the third cylinder 113. The heat exchange tube 130 sequentially passes through the second cylinder 112, the guide tube 180, and the third cylinder 113, and is fixed to the upper tube sheet 150 and the lower tube sheet 160 through a combination of expansion and welding. The wire mesh demister 140 is installed between the inner wall of the first cylinder 111 and the outer bottom of the second cylinder 112, forming a complete cylinder assembly structure to ensure orderly flow of steam and liquid and efficient heat exchange within the cylinder.

[0036] In this embodiment, a first through hole is provided at the bottom of the first cylinder 111. An anti-vortex baffle 170 is provided inside the first cylinder 111, located at the center of the bottom of the first cylinder 111. A secondary steam outlet 001 is provided below the diameter change angle 002 at the top of the first cylinder 111, located on the right side of the first cylinder 111. At the center of the bottom of the first cylinder 111, an inverted conical anti-vortex baffle 170 is installed by welding. The anti-vortex baffle 170 is made of stainless steel plate with a thickness of 10-12mm, and its height is 1 / 5 to 1 / 3 of the cylinder diameter. A first through hole is provided at the bottom of the first cylinder 111, the diameter of which is determined according to the diameter of the liquid outlet pipe 240 to ensure that the liquid outlet pipe 240 can pass through smoothly. On the right side below the diameter change angle 002 at the top of the first cylinder 111, a secondary steam outlet 001 is provided by machining, and a flange is welded to the outlet for easy connection with subsequent pipelines. During installation, ensure that the anti-vortex baffle 170 is firmly installed and located at the center of the first cylinder 111 to prevent the liquid from forming vortices at the bottom and affecting the discharge. At the same time, seal the first through hole and the secondary steam outlet 001 to ensure that there is no leakage during equipment operation, and to ensure that the secondary steam is discharged smoothly and the evaporated liquid flows out smoothly.

[0037] In this embodiment, a lower tube sheet 160 is disposed inside the second cylinder 112. The lower tube sheet 160 is positioned above the top diameter change angle 002 of the first cylinder 111. The top of the lower tube sheet 160 is connected to the bottom of the heat exchange tube 130. Inside the second cylinder 112, according to design requirements, the lower tube sheet 160 is installed near the top diameter change angle 002 by welding an annular support ring. The lower tube sheet 160 is made of stainless steel plate with a thickness of 15~20mm, and its opening position and size match the bottom of the heat exchange tube 130. When installing the heat exchange tube 130, the bottom of the heat exchange tube 130 is inserted into the hole of the lower tube sheet 160, and hydraulic expansion technology is used to tightly connect the heat exchange tube 130 and the lower tube sheet 160. Then, welding is performed at the connection to form a strong sealing structure. This connection between the lower tube sheet 160 and the heat exchange tube 130 can effectively support the heat exchange tube 130, ensure the stability of the heat exchange tube 130 during equipment operation, and at the same time ensure that the liquid flows smoothly and evaporates in the heat exchange tube 130, thereby improving heat exchange efficiency.

[0038] In this embodiment, the top of the third cylinder 113 is provided with an arc-shaped end cap 210, and the top of the end cap 210 is provided with a sight glass 220. The interior of the third cylinder 113 is provided with a water distribution pipe 200 and a shaft hanger 190. The water distribution pipe 200 is located between the end cap 210 and the upper water distribution plate 121, and the shaft hanger 190 is located between the upper tube plate 150 and the guide tube 180. The third cylinder 113 is provided with a circular manhole 004 and a circulating material inlet 005. The manhole 004 is located between the water distribution pipe 200 and the upper water distribution plate 121, and the circulating material inlet 005 is connected to the water distribution pipe 200. The top of the third cylinder 113 is welded with an arc-shaped end cap 210. The end cap 210 is made of steel plate of the same material as the cylinder 110. A circular hole is opened at the center of the top of the end cap 210, and a sight glass 220 is installed to facilitate the operator to observe the internal liquid distribution and evaporation. Inside the third cylinder 113, a water distribution pipe 200, an upper water distribution plate 121, a lower water distribution plate 122, and a shaft hanger 190 are installed sequentially from top to bottom. The water distribution pipe 200 is fixed between the end cap 210 and the upper water distribution plate 121 by a bracket and is connected to the circulating material inlet 005 pipe by welding and flange connection. The shaft hanger 190 is installed between the upper tube sheet 150 and the guide tube 180 and is fixed by bolts to support the upper tube sheet 150 and the water distribution plate distributor 120. On the side wall of the third cylinder 113, a manhole 004 and a circulating material inlet 005 are respectively machined. The manhole 004 is a circular structure and is located between the water distribution pipe 200 and the upper water distribution plate 121 to facilitate personnel to enter the equipment for inspection and cleaning. The circulating material inlet 005 is connected to the water distribution pipe 200 to ensure that the liquid can smoothly enter the water distribution plate distributor 120. After installation, seal and tighten the connections of each component to ensure safe and reliable operation of the equipment.

[0039] In this embodiment, the integrated vertical falling film evaporator device also includes a skirt 230, which is a cylindrical structure with an open top. The bottom of the first cylinder 111 passes through the top of the skirt 230 and is located inside the skirt 230. A liquid outlet pipe 240 is provided inside the skirt 230. The liquid outlet pipe 240 is an L-shaped cylindrical structure. One end of the liquid outlet pipe 240 passes through the first through hole of the first cylinder 111 and is connected to the anti-vortex baffle 170. An elliptical inspection hole 006 and a second through hole are provided on the skirt 230. The second through hole is located on the bottom right side of the skirt 230. The other end of the liquid outlet pipe 240 passes through the second through hole and is located inside the skirt 230. The skirt 230 is made of carbon steel with a thickness of 12~15mm and the height of the skirt 230 ranges from 1000~15000mm, forming a cylindrical structure with an open top. A circular hole matching the outer diameter of the bottom of the first cylinder 111 is made at the center of the top of the skirt base 230. The bottom of the first cylinder 111 is inserted into the skirt base 230 and fixed by welding and bolting to ensure the overall stability of the equipment. An L-shaped cylindrical liquid outlet pipe 240 is installed inside the skirt base 230. The liquid outlet pipe 240 is made of seamless steel pipe. One end is welded through the first through hole of the first cylinder 111 and fixed to the bottom of the anti-vortex baffle 170. The other end passes through the second through hole on the right side of the bottom of the skirt base 230 to discharge the evaporated liquid. The connections between the liquid outlet pipe 240 and the skirt base 230 and the first cylinder 111 are sealed with sealant and flanges to prevent liquid leakage. An elliptical inspection hole 006 is made on the side wall of the skirt base 230 to facilitate inspection and maintenance of the interior of the skirt base 230 and the liquid outlet pipe 240, ensuring long-term stable operation of the equipment.

[0040] Furthermore, during the operation of this integrated vertical falling film evaporator, the feed liquid enters through the circulating material inlet 005 and is transported by the water distribution pipe 200 to the second-layer water distribution plate distributor 120 for uniform distribution, causing the feed liquid to flow downwards in a film along the inner wall of the heat exchange tube 130. Simultaneously, steam enters through the steam inlet 003, transferring heat through the tube wall of the heat exchange tube 130, causing the liquid film inside the tube to evaporate and vaporize. The generated secondary steam flows downwards in parallel with the liquid film. Subsequently, the secondary steam containing droplets flows upwards, and the droplets are separated by the wire mesh demister 140. The secondary steam is discharged from the secondary steam outlet 001, and the separated droplets fall back. Finally, the evaporated feed liquid flows to the liquid outlet pipe 240 in the lower part of the equipment, where it can be discharged or recycled as needed. During this process, operators can inspect and observe through the manhole 004 and the sight glass 220, while the skirt 230 provides stable support for the equipment, ensuring that the entire evaporation process is orderly and efficient.

[0041] This utility model's integrated vertical falling film evaporator achieves high-efficiency evaporation concentration and vapor-liquid separation through a unique split-type cylindrical structure design, a precise liquid distribution water plate distributor, an efficient heat exchange tube connection layout, and a rationally designed wire mesh demister. The cylindrical structure comprises a first, second, and third cylinder, with different structural designs in each part optimizing the internal flow field distribution to ensure efficient flow of steam and liquid. The water distribution plate distributor has upper and lower plates that work together; the upper plate matches the openings in the upper tube sheet, while the lower plate has multiple small holes around the heat exchange tubes to ensure uniform film formation of the liquid. The heat exchange tubes penetrate each cylinder, forming a stable heat transfer channel. The wire mesh demister, within a suitable thickness range, effectively intercepts secondary steam droplets. These structural elements work synergistically to achieve high evaporation efficiency, excellent vapor-liquid separation, stable equipment operation, and ease of maintenance and repair.

[0042] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An integrated vertical falling film evaporator device, characterized in that, Includes the cylinder, water distribution plate distributor, heat exchange tubes, and wire mesh demister; The cylinder body is a hollow cylindrical structure; The water distribution plate distributor has a rhomboid structure and is located inside the cylinder. An upper tube plate is provided at the bottom of the water distribution plate distributor. The heat exchange tube is a hollow cylindrical structure with openings at both ends, and the top of the heat exchange tube is connected to the bottom of the upper tube sheet. The wire mesh demister has a cylindrical mesh structure and is installed inside the cylinder.

2. The integrated vertical falling film evaporator device according to claim 1, characterized in that, The water distribution plate distributor includes an upper water distribution plate and a lower water distribution plate, with the lower water distribution plate positioned below the upper water distribution plate.

3. The integrated vertical falling film evaporator device according to claim 2, characterized in that, The opening positions on the upper water distribution plate match the opening positions on the upper pipe plate.

4. The integrated vertical falling film evaporator device according to claim 3, characterized in that, The openings of the lower water distribution plate are arranged around the upper tube sheet and heat exchange tubes, with at least 6 small holes surrounding each heat exchange tube opening.

5. The integrated vertical falling film evaporator device according to claim 4, characterized in that, The thickness of the wire mesh demister is in the range of 100~300mm.

6. The integrated vertical falling film evaporator device according to claim 5, characterized in that, The cylinder includes a first cylinder, a second cylinder, and a third cylinder. The first cylinder is a cylindrical structure with an open top and tapered sides with varying diameters. The bottom of the first cylinder is an arc-shaped structure. The second cylinder is a cylindrical structure with open top and bottom. The bottom of the second cylinder penetrates the top of the first cylinder and is located inside the first cylinder. The top of the second cylinder is an inclined side structure. The third cylinder is a cylindrical structure with open top and bottom. The bottom of the third cylinder is provided with a guide tube with a polygonal annular structure open at both the top and bottom. A steam inlet is provided on the left side of the guide tube. The top of the second cylinder penetrates the bottom of the guide tube and is located inside the guide tube. The water distribution plate distributor is located inside the third cylinder; The heat exchange tube is installed through the interior of the second cylinder, the guide tube, and the third cylinder; The wire mesh demister is disposed between the inner wall of the first cylinder and the outer bottom of the second cylinder.

7. The integrated vertical falling film evaporator device according to claim 6, characterized in that, The first cylinder has a first through hole at the bottom and an anti-vortex baffle inside. The anti-vortex baffle is located at the center of the bottom of the first cylinder. A secondary steam outlet is located at the top of the first cylinder at a variable diameter angle and is located on the right side of the first cylinder.

8. The integrated vertical falling film evaporator device according to claim 7, characterized in that, The second cylinder has a lower tube sheet inside, which is located above the top diameter change angle of the first cylinder, and the top of the lower tube sheet is connected to the bottom of the heat exchange tube.

9. The integrated vertical falling film evaporator device according to claim 8, characterized in that, The top of the third cylinder is provided with an arc-shaped end cap, and the top of the end cap is provided with a sight glass. The interior of the third cylinder is provided with a water distribution pipe and a shaft hanger. The water distribution pipe is located between the end cap and the upper water distribution plate, and the shaft hanger is located between the upper tube plate and the guide tube. The third cylinder has a manhole and a circulating material inlet. The manhole is circular and is located between the water distribution pipe and the upper water distribution plate. The circulating material inlet is connected to the water distribution pipe.

10. The integrated vertical falling film evaporator device according to claim 9, characterized in that, The integrated vertical falling film evaporator device also includes a skirt base, which is a cylindrical structure with an open top. The bottom of the first cylinder penetrates the top of the skirt base and is located inside the skirt base. A liquid outlet pipe is provided inside the skirt base. The liquid outlet pipe is an L-shaped cylindrical structure. One end of the liquid outlet pipe penetrates the first through hole of the first cylinder and is connected to the anti-vortex baffle. An elliptical inspection hole and a second through hole are provided on the skirt base. The second through hole is located on the bottom right side of the skirt base. The other end of the liquid outlet pipe penetrates the second through hole and is located inside the skirt base.

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