Fluoroplastic evaporator

Abstract

The utility model relates to a fluoroplastic evaporator, and relates to the field of industrial wastewater zero discharge technology, the fluoroplastic evaporator comprises a placing assembly and an evaporator assembly, the placing assembly comprises a cylinder and two tube plates, and the side wall of the cylinder is provided with an air inlet for steam to enter, a discharge port for steam condensate water to be discharged and other tube ports; the two tube plates and the barrel are coaxially arranged, and a plurality of connecting holes are formed in the tube plates; the evaporator assembly comprises a plurality of tube nests, the tube nests are located between the two tube plates, the two ends of the tube nests penetrate through the connecting holes respectively, and the tube nests are fluoroplastic pipelines, on the premise that the manufacturing cost is not increased and the evaporation efficiency is not reduced, strong acid corrosion resistance and non-stick performance are achieved, the tube nests are not prone to scaling, or organic matter solids or crystal salt are not prone to being attached to the tube nests, and the service life of the tube nests is prolonged. The effects of no production halt maintenance, evaporation efficiency improvement and the like are achieved. Therefore, the device has the economic values of scaling resistance, adhesion resistance, corrosion resistance, production-stop-free maintenance, improvement or enhancement of the evaporation efficiency and prolonging of the service life of equipment through the tube nest.

Description

Technical Field

[0001] The present application relates to the field of industrial wastewater zero discharge technology, and in particular to a fluoroplastic evaporator. Background Art

[0002] Zero wastewater discharge means that during the production process, wastewater is purified and reused without being discharged, achieving the requirements of ecological circulation and sustainable development. The field involved in this application is the key step of wastewater treatment - evaporation and crystallization, which involves pre-treating high-concentration (high-salt, high-COD) wastewater to remove COD to the maximum extent possible, and then desalting it.

[0003] In the related art, metal evaporators are usually used. When it is necessary to evaporate high COD (2000mg / L-50000mg / L, or even higher) sewage, the sewage containing COD and salt is first passed into the metal evaporator, and then steam is passed into the metal evaporator for preheating. At this time, the high-temperature steam heats the sewage containing COD and salt through the heat exchange tube. The sewage evaporates, the secondary steam condenses the water and is recovered, and the salt is concentrated to form crystals, so that the water and salt are separated, purified and reused. During the evaporation process, the COD in the water is discharged after the concentration increases to form a mother liquor. After special treatment, the COD is separated, purified or catalytically burned. In this way, the physical separation of water, salt and COD is achieved.

[0004] Regarding the above-mentioned related technologies, steam can evaporate high-salt and high-COD wastewater through heat exchange tubes. However, most wastewater contains corrosive substances such as chloride ions and acids, which can quickly corrode the heat exchange tubes. In addition, wastewater containing high salt and high COD will precipitate some crystals or form organic attachments due to the increase in temperature in the heat exchange tubes. Crystals and COD easily adhere to the inner wall of the heat exchange tubes. As time goes by, the attachments thicken the tube walls and even block the pipelines. Therefore, frequent production shutdowns for cleaning or maintenance are required. The shutdown and maintenance cycle often reaches one or two weeks, resulting in reduced evaporator efficiency. Utility Model Content

[0005] In order to adapt to the highly corrosive evaporation environment and improve the problem of reduced working efficiency of the evaporator, the present application provides a fluoroplastic evaporator.

[0006] The fluoroplastic evaporator provided in this application adopts the following technical solution:

[0007] A fluoroplastic evaporator includes a placement component and an evaporator component, the placement component includes a cylinder and two tube sheets, the cylinder is hollow, and the side wall of the cylinder is provided with an air inlet for steam to enter, an outlet for steam condensed water to be discharged, and other pipe openings, both ends of the cylinder are open, the two tube sheets are each connected to one end of the cylinder, the two tube sheets are coaxially arranged with the cylinder, and a plurality of connecting holes are provided on the tube sheets, the evaporator component includes a plurality of tubes, the plurality of tubes are located between the two tube sheets, the tubes are arranged along the axial direction of the cylinder, the two ends of the tubes are each penetrated by one of the connecting holes, the tubes are connected to the tube sheets, the tubes are used for sewage to pass through, and the tube sheets and the tubes are made of fluoroplastic material.

[0008] By adopting the above technical solution, leveraging the inherent high-temperature resistance, corrosion resistance, and non-stick properties of fluoroplastics, and through innovative designs such as small diameters, thin walls, and dense distribution, the industry's pain points of heat exchange tube corrosion, adhesion to the tube walls, blockage, and interrupted production are completely resolved without compromising efficiency. When a fluoroplastic evaporator is required, high-salt, high-COD wastewater is first passed through the evaporator tubes. Subsequently, steam is introduced into the internal components, heating and evaporating the high-salt, high-COD wastewater. Organic matter and crystals in the high-salt, high-COD wastewater flow through the medium, preventing them from adhering to the tube walls. After evaporation, the wastewater is condensed and recovered, salt is separated after crystallization, and the COD concentration is increased, resulting in mother liquor discharge. Because fluoroplastic pipes have extremely low adhesion and are moderately flexible, crystals are less likely to adhere to the tube walls. They are resistant to strong acids, strong bases, and chloride ions, offering a long service life in highly corrosive media and adapting to a wide range of applications. Compared with related technologies, this application uses fluoroplastic tube sheets and pipes to evaporate high-salt and high-COD wastewater, which makes it difficult for crystals to adhere to the pipe wall and does not require frequent cleaning and maintenance, thereby facilitating the evaporation treatment of high-salt and high-COD wastewater. It has good corrosion resistance, can enhance the service life of pipes and equipment, and is conducive to improving the problem of low working efficiency of the evaporator.

[0009] Optionally, the outer diameter of the tube array is ≤8 mm, the wall thickness is ≤0.5 mm, and the tube wall spacing is ≤4 mm.

[0010] By adopting the above technical solution, in view of the unfavorable factor that the heat transfer performance of fluoroplastic materials is far inferior to that of metal materials, the diameter of the fluoroplastic tube in this application is ≤8mm, the wall thickness is ≤0.5mm, and the tube wall spacing is ≤4mm; and the shell and tube heat exchange area is maximized.

[0011] Optionally, the evaporator assembly further includes a plurality of plugs, one of the plugs corresponds to one of the tubes, the plug is inserted into one end of the tube, the plug is hollow, the plug is interference fit with the tube, and the tube sheet and the tube are connected by expansion joints using the plugs.

[0012] By adopting the above technical solution, when high-salt and high-COD sewage needs to be passed into the tube array, the high-salt and high-COD sewage can pass through the blockage. By setting the blockage, on the one hand, it is convenient to connect the tube array and the tube sheet, and the high-salt and high-COD sewage can flow from the blockage to the tube array; on the other hand, the expansion connection method is adopted, which is conducive to strengthening the connection between the tube array and the tube sheet.

[0013] Optionally, the placement assembly also includes two connecting parts, one end of the connecting part corresponds to one end of the cylinder, the connecting part includes a first reducer for sewage flow and two plate slip-on flanges, the larger end of the first reducer is in contact with the tube sheet, the two plate slip-on flanges are distributed along the axis direction of the first reducer, the two plate slip-on flanges are both sleeved on the outer wall of the first reducer, the outer wall of the cylinder is sleeved with a cylinder flange, the two plate slip-on flanges connected to the first reducer are each close to one end of the first reducer, and the plate slip-on flange close to the larger end of the first reducer is connected to the cylinder flange located on the cylinder.

[0014] By adopting the above technical solution, when high-salt and high-COD sewage needs to be passed into the tube array, first, the high-salt and high-COD sewage is passed into the reducer, and then the high-salt and high-COD sewage falls onto the tube plate and enters the tube array through the connecting hole, thereby realizing the evaporation treatment of the high-salt and high-COD sewage. By setting two connecting pieces, it is convenient to inject the high-salt and high-COD sewage into the tube array.

[0015] Optionally, a connecting assembly is further included, which includes a plurality of stud rods, and the plurality of stud rods are all arranged along the axial direction of the cylinder, and the plurality of stud rods are evenly distributed along the circumference of the plate-type flat-weld flange. The stud rods pass through the cylinder, and the stud rods pass through the plate-type flat-weld flange and the tube sheet.

[0016] By adopting the above technical solution, personnel take out the stud rods, pass the stud rods through the plate type flat welding flange and the tube sheet in turn, and fix them with the plate type flat welding flange and the tube sheet. According to the above operation, the remaining stud rods can be fixed with the plate type flat welding flange and the tube sheet. By setting the stud rods, it is convenient for personnel to perform connection operations.

[0017] Optionally, the connecting assembly further comprises a deflector, which comprises a deflector plate, wherein the deflector plate is provided with a plurality of deflection holes for the tubes to pass through, the deflector plate is connected to the stud rod, the position of the deflection holes is the same as the position of the holes in the tube plate, the size of the deflection holes is the same as the outer diameter of the tubes, the deflector plate also has 90° angle holes and partial notches to facilitate the passage of steam and steam condensate, the deflector plate supports the tubes and controls the flow direction of the steam at the same time.

[0018] By adopting the above technical solution, baffles are provided to facilitate the passage of steam and steam condensate. The baffles support the tubes and determine the flow direction of the steam.

[0019] Optionally, the tube sheet is provided with bolt holes evenly spaced at angles, and the bolt holes are used to seal the tube sheet and the plate-type flat-weld flange. The bolts are sealed with the tube sheet sealing ring, effectively preventing sewage in the pipe from entering the cylinder and contaminating the steam condensate, while also serving to fix the tube sheet.

[0020] By adopting the above technical solution, the bolts and the tube sheet sealing ring are sealed, which effectively prevents the sewage in the tube from entering the evaporator cylinder and contaminating the steam condensate, and at the same time plays the role of fixing the tube sheet.

[0021] Optionally, the tube sheet is provided with an annular groove on the side away from the cylinder, and the tube sheet is provided with a sealing ring in the annular groove. The sealing ring is fixedly bonded to the tube sheet, and the sealing ring is used to seal the connection between the plate-type flat welding flange and the tube sheet.

[0022] By adopting the above technical solution and setting a sealing ring, it is easy to seal the connection between the plate type flat welding flange and the tube sheet, effectively preventing high-salt and high-COD sewage from leaking from between the plate type flat welding flange and the tube sheet.

[0023] Optionally, a drain outlet is provided on the side wall of the cylinder near the bottom of the cylinder, and the cylinder is connected to the drain outlet with a drain pipe, which is sequentially passed through the insulation cylinder and the drain outlet, and is used to discharge condensed water.

[0024] By adopting the above technical solution, when steam is injected into the cylinder, the steam heats the tubes, and then condensed water is generated and flows to the bottom of the cylinder. By setting a drain port, the discharge of the condensed water is facilitated.

[0025] Optionally, a balancing port is provided on the side wall of the cylinder, and the cylinder is connected to a balancing pipe at the balancing port. One end of the balancing pipe is sequentially passed through the insulation cylinder and the balancing port, and the other end is connected to a designated container.

[0026] By adopting the above technical solution and providing a balancing port and a balancing pipe, the pressure in the cylinder can be balanced, thereby facilitating the discharge of condensed water.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Compared with related technologies, this application uses fluoroplastic pipes to evaporate high-salt, high-COD wastewater, which is less likely to cause crystals to adhere to the pipe wall, helping to improve the problem of reduced evaporator efficiency, thereby facilitating the evaporation treatment of high-salt, high-COD wastewater; it has good corrosion resistance and can extend the service life of the evaporator tubes;

[0029] 2. The heat exchange area per unit volume of the evaporator is increased by reducing the tube diameter and the distance between the tube walls. By reducing the wall thickness of the heat exchange tube, the lack of heat transfer efficiency of fluoroplastics that is not as high as that of metal tubes is compensated, achieving the goal of preventing adhesion, blocking and corrosion without reducing evaporation efficiency.

[0030] 3. Through precise control of the tube side pressure being slightly greater than the shell side pressure, the heat exchange tube is prevented from being damaged due to the outer pressure being greater than the inner pressure when the tube wall is significantly thinned;

[0031] 4. By setting the plug, on the one hand, it is easier to connect the tube and the tube sheet, and the high-salt and high-COD sewage can flow from the plug to the tube; on the other hand, the expansion connection method is used to strengthen the connection between the tube and the tube sheet;

[0032] 5. By setting the stud tie rod, on the one hand, it can strengthen the connection of the baffle and facilitate the support of the tube; on the other hand, it is convenient for personnel to perform installation operations;

[0033] 6. By setting bolts and tube sheet sealing rings for sealing, it can ensure that the tube sheet and the connector are tightly fitted, effectively preventing sewage in the connector from entering the cylinder and contaminating the steam condensate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 2 is a schematic diagram of the overall structure of the first perspective in this embodiment;

[0035] Figure 2 is a cross-sectional view of the first perspective of the placement component in this embodiment;

[0036] Figure 3 is a cross-sectional view of the overall structure of this embodiment;

[0037] Figure 4 is a cross-sectional view of the second perspective of the placement component in this embodiment;

[0038] Figure 5 yes Figure 4 A magnified view of middle A;

[0039] Figure 6 is a cross-sectional view of the third perspective of the placement component in this embodiment;

[0040] Figure 7 yes Figure 6 Enlarged view of middle B;

[0041] Figure 8 is the overall structure schematic diagram of the second perspective in this embodiment.

[0042] Label explanation: 1, placing assembly; 11, cylinder; 111, air inlet; 112, second reducing; 1121, seamless pipeline; 113, discharge port; 114, air outlet pipe; 1141, air outlet valve; 115, drainage port; 116, discharge pipe; 1161, discharge valve; 117, balance port; 118, balance pipe; 1181, balance valve; 119, containing groove; 12, tube plate; 121, connecting hole; 122, ring groove; 123, sealing ring; 13, connecting piece; 131, first reducing; 132, plate type flat welding flange; 2, evaporator assembly; 21, tube; 22, plug; 3, connecting assembly; 31, stud pull rod; 32, baffle; 321, baffle plate; 3211, baffle hole; 322, cover-shaped nut; 4, heat preservation assembly; 41, heat preservation frame; 411, sealing ring; 42, heat preservation plate; 43, elastic piece; 431, abutting plate; 432, spring; 5, supporting assembly; 51, supporting ring; 52, supporting frame. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying Figure 1-8 Further detailed description will be made to the present application.

[0044] The embodiment of the present application discloses a fluoroplastic evaporator. Referring to Figure 1 and Figure 2 A fluoroplastic evaporator comprises a placing assembly 1, an evaporator assembly 2, a connecting assembly 3, a heat preservation assembly 4 and a supporting assembly 5, the evaporator assembly 2 is arranged in the placing assembly 1, the connecting assembly 3 and the heat preservation assembly 4 are both arranged on the placing assembly 1, and the supporting assembly 5 is arranged on the heat preservation assembly 4.

[0045] Referring to Figure 2The placement component 1 includes a cylinder 11, two tube sheets 12 and two connectors 13. In this embodiment, the cylinder 11 is cylindrical and hollow. Both ends of the cylinder 11 are open. The two tube sheets 12 correspond to one end of the cylinder 11. In this embodiment, the tube sheet 12 is made of fluoroplastic material. The tube sheet 12 and the cylinder 11 are coaxially arranged. The two tube sheets 12 each close one end of the cylinder 11. The tube sheet 12 fits with the opening of the cylinder 11 and is connected to the connector 13. One connector 13 corresponds to one tube sheet 12. The connector 13 is located on the side of the tube sheet 12 away from the cylinder 11. The connector 13 includes a first diameter reducer 131 and two plate-type flat welding flanges 132. The larger end of the first diameter reducer 131 is close to the cylinder 11, and the larger end of the first diameter reducer 131 is in contact with the tube sheet 12. The two plate-type flat welding flanges 132 are distributed along the axis direction of the cylinder 11. The two plate-type flat welding flanges 132 are connected to the first diameter reducer 131. The tube sheet 12 can be fixed by bolts. It is connected to the plate type flat welding flange 132, and can also be connected to the plate type flat welding flange 132 by welding. In this embodiment, the tube sheet 12 is fixedly connected to the plate type flat welding flange 132 by bolts, which can prevent the tube sheet 12 from falling off. The tube sheet 12 and the bolt connection are sealed by a sealing ring, which can ensure that the tube sheet 12 and the plate type flat welding flange 132 are tightly fitted, effectively preventing the sewage in the connector 13 from entering the cylinder 11 and polluting the steam condensate. The end of the cylinder 11 close to the first reducer 131 A cylinder flange is sleeved, and the cylinder flange is welded to the cylinder 11, and the plate flat welding flange 132 located on the cylinder 11 is close to the first diameter reducer 131, and the two plate flat welding flanges 132 located on the first diameter reducer 131 are each sleeved on one end of the first diameter reducer 131, and the plate flat welding flange 132 located on the first diameter reducer 131 is welded to the first diameter reducer 131, and the plate flat welding flange 132 located at the larger end of the first diameter reducer 131 is fixedly connected to the cylinder flange located on the cylinder 11 by bolts.

[0046] Reference Figure 2The evaporator assembly 2 includes a plurality of tubes 21 and a plurality of plugs 22. A plurality of connecting holes 121 are provided on the two tube sheets 12. The connecting holes 121 penetrate the tube sheets 12 along the thickness of the tube sheets 12, and the connecting holes 121 on the two tube sheets 12 correspond to each other. The plurality of tubes 21 are located between the two tube sheets 12. The axial direction of the tubes 21 is consistent with the axial direction of the cylinder 11. One tube 21 corresponds to one connecting hole 121 on the same tube sheet 12. A gap for steam flow is left between the plurality of tubes 21, and a gap is left between the tubes 21 and the side wall of the cylinder 11. The tubes 21 are used for passing high-salt and high-COD sewage. The tubes 21 are made of fluoroplastic material. In the embodiment, the tube wall of the tube 21 is relatively thin, the outer diameter of the tube 21 is ≤8mm, the wall thickness is ≤0.5mm, and the tube wall spacing is ≤4mm, which maximizes the heat exchange area of ​​the tube 21 to make up for the difference in thermal conductivity between fluorine materials and metals. The tubes 21 can be arranged in an equilateral triangle or a star shape. The chemical properties of fluorine are extremely stable, and the fluoroplastic pipes have a relatively stable heat transfer coefficient; they have good anti-oxidation and corrosion resistance, the surface of the fluoroplastic pipe wall is smooth, and has moderate flexibility, is not easy to scale, is resistant to strong acids and strong alkalis, has a long service life in highly corrosive media, has a very small friction coefficient, low roughness, good lubrication performance, and low resistance to high-salt and high-COD sewage in the tube bundle.

[0047] Reference Figure 2 , one tube 21 corresponds to two plugs 22, and the two plugs 22 are respectively plugged into one end of the same tube 21, the plug 22 and the tube 21 have an interference fit, the plug 22 is hollow, and when the tube 21 is passed through the connecting hole 121, the tube 21 is connected to the tube sheet 12 by expansion joint through the plug 22; the outside of the tube 21 is steam, and the inside is sewage, the water pressure is greater than the air pressure, and pressure sensors are fixed in the cylinder 11 and at the water outlet of the tube 21, which can measure the pressure in the tube 21 and the cylinder 11. The two pressure sensors are electrically connected to the display, and the pressure sensor can The measured pressure is transmitted to the display for personnel to view. In view of the fact that the strength of the fluoroplastic tube decreases and it is easy to break after the wall of the tube is thinned, the tube-side pressure of the tube 21 is slightly higher than the shell-side pressure (the pressure difference is 0.02-0.05Mpa). In this embodiment, the pressure difference between the pressure inside the tube 21 and the pressure outside the tube 21 is 0.02Mpa-0.05Mpa. The flow rate of the high-salt and high-COD sewage in the tube 21 is not less than 0.18m / s-0.2m / s. Controlling the flow rate of the high-salt and high-COD sewage in the tube 21 can effectively avoid problems that may occur in the evaporation operation of the metal evaporator.

[0048] Reference Figure 3The side wall of the cylinder 11 is provided with an air inlet 111, which is communicated with the interior of the cylinder 11. The cylinder 11 is provided with a second diameter reducer 112 at the air inlet 111. The larger end of the second diameter reducer 112 is communicated with the air inlet 111. The second diameter reducer 112 is welded to the cylinder 11. The smaller end of the second diameter reducer 112 is provided with a seamless pipe 1121. One end of the seamless pipe 1121 is communicated with the smaller end of the second diameter reducer 112. The seamless pipe 1121 is welded to the second diameter reducer 112. Steam can enter the cylinder 11 through the seamless pipe 1121 and the second reducer 112; a discharge port 113 is provided on the side wall of the cylinder 11, and an air outlet pipe 114 is provided at the discharge port 113 of the cylinder 11. The air outlet pipe 114 is connected to the discharge port 113, and the air outlet pipe 114 is welded to the cylinder 11. The remaining steam after condensation can be discharged from the discharge port 113. An air outlet valve 1141 is provided on the air outlet pipe 114, and the air outlet valve 1141 is fixedly connected to the air outlet pipe 114 through a flange.

[0049] Reference Figure 3 Two drain ports 115 are provided on the side wall of the cylinder 11 near the bottom of the cylinder 11. Both drain ports 115 are connected to the interior of the cylinder 11. The two drain ports 115 are symmetrically arranged along the axis of the cylinder 11. The cylinder 11 is provided with a discharge pipe 116 at each drain port 115. The discharge pipe 116 is welded to the cylinder 11, wherein one discharge pipe 116 is connected to the discharge pipe 116 on the other cylinder 11 for condensed water circulation, and the other discharge pipe 116 is used to discharge condensed water. A discharge valve 1161 is connected to the discharge pipe 116 through a flange; a balancing port 117 is provided on the side wall of the cylinder 11, and the balancing port 117 is connected to the interior of the cylinder 11. The cylinder 11 is provided with a balancing pipe 118 at the balancing port 117. One end of the balancing pipe 118 is welded to the cylinder 11, and the other end is connected to a designated container. The balancing pipe 118 is used to balance the pressure in the cylinder 11, thereby facilitating the outflow of condensed water. A balancing valve 1181 is fixedly connected to the balancing pipe 118 through a flange.

[0050] Reference Figure 4 and Figure 5 The connection assembly 3 includes a plurality of stud rods 31 and a plurality of deflectors 32. The plurality of stud rods 31 are arranged along the axial direction of the cylinder 11. The plurality of stud rods 31 are evenly distributed circumferentially along the plate flat welding flange 132. The stud rods 31 pass through the cylinder 11. The stud rods 31 pass through the plate flat welding flange 132 and the tube sheet 12. The stud rods 31 can fix the plate flat welding flange 132, thereby strengthening the connection between the plate flat welding flange 132 and the tube sheet 12; an annular groove 122 is opened on the side of the tube sheet 12 away from the cylinder 11, and a sealing ring 123 is provided in the annular groove 122 of the tube sheet 12. The sealing ring 123 is fixedly bonded to the tube sheet 12, and the sealing ring 123 is used to seal the connection between the plate flat welding flange 132 and the tube sheet 12.

[0051] Reference Figure 4 , multiple deflectors 32 are located between the two tube sheets 12, and multiple deflectors 32 are spaced apart along the axial direction of the cylinder 11. The deflectors 32 include deflectors 321 and cap nuts 322. In this embodiment, the deflectors 321 are circular plates. The deflectors 321 are arranged horizontally. The arrangement direction of the deflectors 321 is perpendicular to the axial direction of the cylinder 11. A plurality of deflection holes 3211 are provided on the deflector 321, and the tubes 21 are passed through the deflection holes 3211. In this embodiment, the material of the deflector 321 is polytetrafluoroethylene, which has the characteristics of acid and alkali resistance and high temperature resistance. One side of the deflector 321 is welded to the cap nut 322, and the cap nut 322 is threadedly connected to the stud rod 31 to facilitate the flow of steam in the cylinder 11. The deflector 321 is also provided with a 90° angle hole and a partial notch to facilitate the passage of steam and steam condensate. The deflector 321 supports the tubes 21 and specifies the flow direction of steam.

[0052] Reference Figure 6 and Figure 7 The insulation component 4 includes an insulation frame 41, an insulation plate 42 and a plurality of elastic members 43. The insulation frame 41 is located outside the cylinder 11. In this embodiment, the insulation frame 41 is cylindrical and the insulation frame 41 is coaxially arranged with the cylinder 11. The insulation frame 41 is connected to the cylinder 11, and the insulation plate 42 is connected to the insulation frame 41. The insulation plate 42 and the insulation frame 41 form an insulation cylinder for insulating the cylinder 11. The seamless pipe 1121, the air outlet pipe 114, the discharge pipe 116 and the balance pipe 118 are all passed through the insulation cylinder.

[0053] Reference Figure 6 and Figure 7 , a plurality of receiving grooves 119 are provided on the outer wall of the cylinder 11 near both ends of the heat preservation frame 41, and the plurality of receiving grooves 119 near one end of the heat preservation frame 41 are evenly distributed along the circumference of the cylinder 11, and an elastic member 43 corresponds to one receiving groove 119, and the elastic member 43 includes an abutment plate 431 and a spring 432, and the abutment plate 431 is located in the receiving groove 119, and the abutment plate 431 fits with the receiving groove 119, and the abutment plate 431 is slidably connected to the cylinder 11, and the movement direction of the abutment plate 431 is perpendicular to the axial direction of the cylinder 11, and the spring 432 is located in the receiving groove 119, and the setting direction of the spring 432 is perpendicular to the axial direction of the cylinder 11 The spring 432 is welded to the cylinder 11 at one end and to the abutment plate 431 at the other end. In this embodiment, the spring 432 is a compression spring, and the end of the abutment plate 431 close to the insertion side of the heat preservation frame 41 is tilted, and the abutment plate 431 is tilted toward the side close to the axis of the cylinder 11. When the heat preservation frame 41 is sleeved outside the cylinder 11, the heat preservation frame 41 pushes the abutment plate 431 to move toward the side close to the cylinder 11. At this time, the spring 432 is compressed, and the spring 432 has elastic potential energy. When the heat preservation frame 41 is installed, the abutment plate 431 abuts against the heat preservation frame 41, and the surface of the abutment plate 431 is flush with the side wall of the cylinder 11.

[0054] Reference Figure 6 and Figure 7 A sealing ring 411 is provided on both ends of the heat preservation frame 41 near the side of the abutting plate 431 . The sealing ring 411 is fixedly bonded to the heat preservation frame 41 . The sealing ring 411 is used to seal the connection between the heat preservation frame 41 and the cylinder 11 .

[0055] Reference Figure 8 The support assembly 5 includes a support ring 51 and a support frame 52. The support ring 51 is sleeved on the outside of the insulation tube. The support ring 51 can be fixedly connected to the insulation plate 42 by screws or by welding. In this embodiment, the support ring 51 is fixedly connected to the insulation plate 42 by welding, and the support frame 52 is fixedly connected to the support ring 51 by screws. The support frame 52 can support the fluoroplastic evaporator.

[0056] The implementation principle of a fluoroplastic evaporator in an embodiment of the present application is as follows: when a fluoroplastic evaporator is needed, first, the high-salt and high-COD sewage to be treated is passed into the tube array 21 through a connector, and then steam is passed into the cylinder 11 through the air inlet 111 on the cylinder 11. The steam can heat the high-salt and high-COD sewage. After the heating is completed, the treated high-salt and high-COD sewage flows out from the other end of the tube array 21. After the high-salt and high-COD sewage evaporates, the inorganic salts in the sewage are concentrated and crystallized. The treated high-salt and high-COD sewage is collected and further treated, and the condensed water is discharged.

[0057] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A fluoroplastic evaporator, characterized by: The evaporator assembly (2) comprises a placement component (1) and an evaporator assembly (2), wherein the placement component (1) comprises a cylinder (11) and two tube sheets (12), wherein the cylinder (11) is hollow, and a side wall of the cylinder (11) is provided with an air inlet (111) for steam to enter, an outlet (113) for steam condensate to be discharged, and other pipe openings, and both ends of the cylinder (11) are open, and the two tube sheets (12) are each connected to one end of the cylinder (11), and the two tube sheets (12) are both coaxially arranged with the cylinder (11). A plurality of connection holes (121) are provided on the tube sheet (12). The evaporator assembly (2) includes a plurality of tubes (21). The plurality of tubes (21) are located between two tube sheets (12). The tubes (21) are arranged along the axial direction of the cylinder (11). Both ends of the tubes (21) are respectively passed through one of the connection holes (121). The tubes (21) are connected to the tube sheet (12). The tubes (21) are used for sewage to pass through. The tube sheet (12) and the tubes (21) are made of fluoroplastic material.

2. A fluoroplastic evaporator according to claim 1, characterized in that: The outer diameter of the tubes (21) is ≤8 mm, the wall thickness is ≤0.5 mm, and the tube wall spacing is ≤4 mm.

3. A fluoroplastic evaporator according to claim 1, characterized in that: The evaporator assembly (2) further comprises a plurality of plugs (22), one of the plugs (22) corresponds to one of the tubes (21), the plug (22) is inserted into one end of the tube (21), the plug (22) is hollow, the plug (22) and the tube (21) are interference-fitted, and the tube sheet (12) and the tube (21) are connected by expansion joints using the plug (22).

4. A fluoroplastic evaporator according to claim 1, characterized in that: The placement component (1) also includes two connecting pieces (13), one end of one connecting piece (13) corresponds to one end of the cylinder (11), the connecting piece (13) includes a first reducer (131) for sewage flow and two plate-type flat-weld flanges (132), the larger end of the first reducer (131) is in contact with the tube sheet (12), the two plate-type flat-weld flanges (132) are distributed along the axis direction of the first reducer (131), the two plate-type flat-weld flanges (132) are both sleeved on the outer wall of the first reducer (131), the outer wall of the cylinder (11) is sleeved with a cylinder flange, the two plate-type flat-weld flanges (132) connected to the first reducer (131) are each close to one end of the first reducer (131), and the plate-type flat-weld flange (132) close to the larger end of the first reducer (131) is connected to the cylinder flange located on the cylinder (11).

5. A fluoroplastic evaporator according to claim 4, characterized in that: It also includes a connection assembly (3), which includes a plurality of stud rods (31), and the plurality of stud rods (31) are all arranged along the axial direction of the cylinder (11), and the plurality of stud rods (31) are evenly distributed along the circumference of the plate-type flat-weld flange (132). The stud rods (31) pass through the cylinder (11), and the stud rods (31) pass through the plate-type flat-weld flange (132) and the tube sheet (12).

6. A fluoroplastic evaporator according to claim 5, characterized in that: The connecting assembly (3) further comprises a deflector (32), the deflector (32) comprising a deflector plate (321), the deflector plate (321) being provided with a plurality of deflection holes (3211) for the tubes (21) to pass through, the deflector plate (321) being connected to the stud rod (31), the positions of the deflection holes (3211) being the same as the positions of the holes of the tube plate (12), the size of the deflection holes (3211) being the same as the outer diameter of the tubes (21), the deflector plate (321) also having a hole with a 90° angle and a partial notch to facilitate the passage of steam and steam condensate, the deflector plate (321) supporting the tubes (21) and controlling the flow direction of the steam.

7. A fluoroplastic evaporator according to claim 4, characterized in that: The tube sheet (12) is provided with bolt holes evenly spaced at an angle. The bolt holes are used to seal the tube sheet (12) and the plate-type flat-weld flange (132). The bolts are sealed with the sealing ring of the tube sheet (12), effectively preventing sewage in the pipe from entering the cylinder (11) and contaminating the steam condensate, while also serving to fix the tube sheet (12).

8. A fluoroplastic evaporator according to claim 7, characterized in that: The tube sheet (12) is provided with an annular groove (122) on a side away from the cylinder (11), and the tube sheet (12) is provided with a sealing ring (123) in the annular groove (122). The sealing ring (123) is fixedly bonded to the tube sheet (12), and the sealing ring (123) is used to seal the connection between the plate-type flat welding flange (132) and the tube sheet (12).

9. The fluoroplastic evaporator according to claim 1, characterized in that: A drain outlet (115) is provided on the side wall of the cylinder (11) near the bottom of the cylinder (11); the cylinder (11) is connected to a drain outlet (115) with a discharge pipe (116); the discharge pipe (116) is sequentially passed through the heat-insulating cylinder and the drain outlet (115); and the discharge pipe (116) is used to discharge condensed water.

10. The fluoroplastic evaporator according to claim 9, characterized in that: A balancing port (117) is provided on the side wall of the cylinder (11), and a balancing pipe (118) is connected to the balancing port (117) of the cylinder (11). One end of the balancing pipe (118) is sequentially passed through the heat preservation cylinder and the balancing port (117), and the other end is connected to a designated container.

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