Multi-effect evaporation tower

Abstract

The utility model relates to the technical field of evaporation towers, and discloses a multi-effect evaporation tower which comprises a bottom plate, a first evaporation tank and a second evaporation tank, and further comprises a heat insulation assembly arranged in a hollow interlayer and used for slowing down the loss speed of steam heat, and the steam conveying assembly is arranged at the top end of the third steam outlet pipe and can be used for conveying heated steam into the second evaporation tank. According to the utility model, the quick connecting component is matched with the quick connecting component, so that the butt-joint process is simplified, the butt-joint difficulty is reduced, and an operator is prevented from getting close to the first evaporation tank and the second evaporation tank and being injured; steam and liquid to be evaporated are subjected to sufficient heat exchange through the evaporation assembly, then heating steam generated by the evaporation assembly in the first evaporation tank is input into the second evaporation tank through the steam conveying assembly, in this way, the evaporation assembly in the second evaporation tank is heated, and repeated utilization of energy is achieved; the heat exchange rate with the external environment is reduced through the heat insulation assembly, and a safe working environment is provided for operators.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporation towers, in particular to a multi-effect evaporation tower. Background Art

[0002] A multi-effect evaporation tower is a system that connects multiple single-effect evaporators in series. By introducing the secondary steam generated by the previous effect evaporator into the next effect evaporator as heating steam, it can achieve multiple utilization of energy and achieve energy saving. It is commonly used in chemical, petroleum, pharmaceutical, food and environmental protection fields. Especially in industrial production and industrial wastewater treatment processes, it has the characteristics of significantly reducing water vapor consumption and improving the economy of evaporation equipment.

[0003] When the existing multi-effect evaporation tower is in use, since the evaporation tower needs to continuously input external steam into the evaporation tower through pipes during operation, the outer surface of the evaporation tower will be kept in a high temperature state, which makes it easy for operators to be scalded if they accidentally touch the evaporation tower during work, and the surface of the evaporation tower is directly exposed to the external environment, which also causes a waste of heat energy resources. At the same time, the water pipes of the evaporation tower are usually connected by flanges, and the flange connection operation steps are relatively cumbersome and cannot achieve quick docking between the water pipes. The operator needs to be close to the evaporation tower for a long time, which makes the whole process dangerous and is not conducive to the normal operation of the multi-effect evaporation tower. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-effect evaporation tower to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a multi-effect evaporation tower, comprising a bottom plate, a first evaporation tank, and a second evaporation tank; a plurality of support plates are symmetrically mounted at the bottom edges of the first evaporation tank and the second evaporation tank, the bottom ends of the support plates being connected to the bottom plate; a first steam inlet pipe is connected to the bottom of one side of the inner wall of the first evaporation tank, and a second steam inlet pipe is connected to the bottom of one side of the inner wall of the second evaporation tank; a hollow interlayer is provided on the outer sides of the first evaporation tank and the outer sides of the second evaporation tank; and further comprising:

[0006] An insulating assembly is provided inside the hollow interlayer for slowing down the rate of heat loss from the steam. A first liquid inlet pipe is connected to the center of the bottom surface of the hollow interlayer. A second liquid inlet pipe is provided at the bottom end of the first liquid inlet pipe. An evaporation assembly is provided at the top end of the first liquid inlet pipe for increasing the contact area between the liquid input into the second liquid inlet pipe and the steam. A first sealing top cover is installed at the top opening of the first evaporator tank. A third steam outlet pipe is connected to the top of the first sealing top cover.

[0007] A steam transmission assembly is provided at the top end of the third steam outlet pipe, which allows heated steam to be input into the second evaporator. A quick-connect assembly is provided on the outer side of the first liquid inlet pipe to increase the connection speed of the second liquid inlet pipe. A sealing assembly is provided on the outer side of the top end of the second liquid inlet pipe to enhance the sealing performance at the end of the first liquid inlet pipe. An atomizer is fixedly connected to the top of the inner cavity of the second evaporator. A second sealing top cover is installed at the top opening of the second evaporator. The top of the second sealing top cover is connected to the fifth steam outlet pipe.

[0008] Preferably, the thermal insulation component includes an insulation layer arranged inside the hollow interlayer, a spiral electric heating tube is installed on the inner wall of the insulation layer, an insulation layer is provided on the outside of the insulation layer, the insulation layer is made of glass wool material, and the insulation layer is made of polyurethane foam material.

[0009] Preferably, the evaporation assembly includes a contact tube arranged at the top end of the first liquid inlet pipe, and there are no less than two contact tubes. The multiple contact tubes are concentrically arranged, and the contact tubes are nested and combined with each other from large to small. A third liquid inlet pipe is provided below the contact tube, and a first steam outlet pipe is provided above the contact tube. The contact tubes are respectively connected to the third liquid inlet pipe and the first steam outlet pipe, the top end of the first steam outlet pipe is connected to the third steam outlet pipe, and the bottom end of the third liquid inlet pipe is connected to the first liquid inlet pipe.

[0010] Preferably, the steam transmission component includes an exhaust fan fixed to one side of the second evaporator, one end of the second steam inlet pipe is connected to the exhaust fan outlet, the exhaust fan inlet is connected to the fourth steam outlet pipe, and the top of the fourth steam outlet pipe is connected to the third steam outlet pipe.

[0011] Preferably, the quick-connect assembly includes a U-shaped seat arranged on the outside of the bottom end of the first liquid inlet pipe, and the U-shaped seats are provided with no less than three, and multiple U-shaped seats are equidistantly distributed circumferentially along the outer wall of the first liquid inlet pipe, the bottom of the U-shaped seat is connected to the first liquid inlet pipe, and a strip rod is rotatably connected inside the U-shaped seat, and the strip rod is hollow in design, and a rack is provided inside the strip rod, and one end of the rack is fixedly connected to a locking buckle, and a locking groove corresponding to the locking buckle is provided on the outside of the top end of the second liquid inlet pipe, and the locking buckle is located inside the locking groove, and a transmission cavity is provided at the top of one end of the strip rod, and a worm gear is rotatably connected inside the transmission cavity, and the bottom of the worm gear is meshed with the rack, and a worm is provided on one side of the worm gear, and the worm gear is rotatably connected to both sides of the inner wall of the transmission cavity, and one side of the worm gear is meshed with the worm gear.

[0012] Preferably, guide blocks are fixedly connected to both sides of the rack, and guide grooves corresponding to the guide blocks are opened on both sides of the inner wall of the strip rod, and the guide blocks are located inside the guide grooves.

[0013] Preferably, the sealing assembly includes a docking groove arranged at the bottom end of the first liquid inlet pipe, the second liquid inlet pipe is connected to the first liquid inlet pipe through the docking groove, and multiple sealing rings are installed on the outside of the docking groove, and the sealing rings are in contact with the first liquid inlet pipe and the second liquid inlet pipe respectively.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The utility model simplifies the docking process by using a quick-connect assembly in conjunction with the quick-connect assembly, reduces the docking difficulty, and avoids injuries to operators due to prolonged close proximity to the first evaporator and the second evaporator; the evaporation assembly allows the steam to fully exchange heat with the liquid to be evaporated, and then the heated steam produced by the evaporation assembly inside the first evaporator is input into the second evaporator through the steam transmission assembly, thereby heating the evaporation assembly inside the second evaporator, thereby realizing multiple utilization of energy; the heat exchange rate between the steam and the external environment is reduced by the heat insulation assembly, effectively slowing down the dissipation of steam heat energy, and also providing a safe working environment for the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a multi-effect evaporation tower provided by the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the first evaporation tank provided by the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the second evaporation tank provided by the utility model;

[0019] Figure 4 A schematic diagram of the quick-connect assembly structure provided by the utility model;

[0020] Figure 5 A schematic diagram of the internal structure of the bar provided by the utility model;

[0021] Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle.

[0022] In the figure: 1, bottom plate; 2, first evaporator; 3, second evaporator; 4, support plate; 5, first steam inlet pipe; 6, second steam inlet pipe; 7, hollow interlayer; 8, thermal insulation assembly; 81, thermal insulation layer; 82, spiral electric heating tube; 83, thermal insulation layer; 9, first liquid inlet pipe; 10, second liquid inlet pipe; 11, evaporation assembly; 111, third liquid inlet pipe; 112, contact pipe; 113, first steam outlet pipe; 12, first sealing top cover; 13, third steam outlet pipe; 14 , steam transmission assembly; 141, fourth steam outlet pipe; 142, exhaust fan; 15, quick-connect assembly; 151, U-shaped seat; 152, bar rod; 153, transmission chamber; 154, rack; 155, locking buckle; 156, locking groove; 157, worm gear; 158, worm; 16, guide groove; 17, guide block; 18, atomizer; 19, second sealing top cover; 20, fifth steam outlet pipe; 21, sealing assembly; 211, docking groove; 212, sealing ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-6As shown, a multi-effect evaporation tower includes a bottom plate 1, a first evaporation tank 2 and a second evaporation tank 3. A plurality of support plates 4 are symmetrically installed at the bottom edge of the first evaporation tank 2 and the bottom edge of the second evaporation tank 3. The bottom end of the support plate 4 is connected to the bottom plate 1. A first steam inlet pipe 5 is connected to the bottom of one side of the inner wall of the first evaporation tank 2, and a second steam inlet pipe 6 is connected to the bottom of one side of the inner wall of the second evaporation tank 3. A hollow interlayer 7 is provided on the outside of the first evaporation tank 2 and the outside of the second evaporation tank 3. The tower also includes: a heat insulation component 8 arranged inside the hollow interlayer 7 to slow down the heat loss rate of steam. By providing the heat insulation component 8, on the one hand, the heat exchange rate between the steam inside the first evaporation tank 2 and the second evaporation tank 3 and the external environment is reduced, and the heat loss rate is effectively slowed down. The heat energy of the steam is dissipated to avoid waste of resources. On the other hand, the heat inside the first evaporation tank 2 and the second evaporation tank 3 can be isolated in the hollow interlayer 7, so as to prevent the outer surface temperature of the first evaporation tank 2 and the second evaporation tank 3 from being too high and causing burns to the operators, thereby providing a safe working environment for the operators. A first liquid inlet pipe 9 is connected to the center of the bottom surface of the hollow interlayer 7, and a second liquid inlet pipe 10 is provided at the bottom end of the first liquid inlet pipe 9. An evaporation component 11 is provided at the top end of the first liquid inlet pipe 9 for increasing the contact area between the liquid input by the second liquid inlet pipe 10 and the steam. By providing the evaporation component 11, the contact area between the steam and the liquid to be evaporated can be increased, and the stop time of the liquid to be evaporated inside the first evaporation tank 2 and the second evaporation tank 3 can be extended. The steam is heated and then fed to the second evaporator 3. The steam is then fed to the second evaporator 3 and the steam is fed to the second evaporator 3. The steam is then fed to the second evaporator 3 and the steam is fed to the second evaporator 3. The steam is then fed to the second evaporator 3 and the steam is fed to the second evaporator 3. The steam is then fed to the second evaporator 3 and the steam is fed to the second evaporator 3. The steam is then fed to the second evaporator 3 and the steam is fed to the second evaporator 3. The provision of the quick-connect assembly 15 effectively increases the docking speed between the first and second liquid inlet pipes 9, 10, simplifies the docking process, and reduces the difficulty of docking the first and second liquid inlet pipes 9, 10. This prevents operators from being injured by prolonged close proximity to the first and second evaporation tanks 2, 3, thereby improving work safety. A sealing assembly 21 is provided on the outer side of the top end of the second liquid inlet pipe 10 to enhance the sealing performance at the end of the first liquid inlet pipe 9. The provision of the sealing assembly 21, in conjunction with the quick-connect assembly 15, seals the gap between the first and second liquid inlet pipes 9, 10, thereby preventing the liquid to be evaporated from flowing out of the docking point between the first and second liquid inlet pipes 9, 10.An atomizer 18 is fixedly connected to the top of the inner cavity of the second evaporator 3. A second sealed top cover 19 is installed at the top opening of the second evaporator 3. A fifth steam outlet pipe 20 is connected to the top of the second sealed top cover 19. The atomizer 18 can atomize the steam ejected from the top of the evaporation assembly 11. The atomized steam is then output to the outside through the fifth steam outlet pipe 20 for collection.

[0025] The heat insulation component 8 includes a heat preservation layer 81 arranged inside the hollow interlayer 7, a spiral electric heating tube 82 is installed on the inner wall of the heat preservation layer 81, and a heat insulation layer 83 is provided on the outer side of the heat preservation layer 81. The heat insulation layer 83 is made of glass wool material, and the heat preservation layer 81 is made of polyurethane foam material. Figure 3 As shown, in actual use, the spiral electric heating tube 82 can be connected in series with an external temperature controller through a wire. This makes it easy to control the heating temperature of the spiral electric heating tube 82 to assist in the steady evaporation of the liquid. The thermal insulation layer 81 and the heat insulating layer 83 can then reduce the heat exchange rate between the steam inside the first evaporation tank 2 and the second evaporation tank 3 and the external environment, effectively slowing down the dissipation of steam heat energy. It can also provide a safe working environment for operators and prevent the outer surface temperature of the first evaporation tank 2 and the second evaporation tank 3 from being too high, which may cause burns to the operators.

[0026] The evaporation assembly 11 includes a contact tube 112 arranged at the top of the first liquid inlet pipe 9. There are no less than two contact tubes 112, and the multiple contact tubes 112 are concentrically arranged. The contact tubes 112 are nested and combined from large to small. A third liquid inlet pipe 111 is provided below the contact tube 112, and a first steam outlet pipe 113 is provided above the contact tube 112. The contact tube 112 is connected to the third liquid inlet pipe 111 and the first steam outlet pipe 113 respectively. The top of the first steam outlet pipe 113 is connected to the third steam outlet pipe 13, and the bottom of the third liquid inlet pipe 111 is connected to the first liquid inlet pipe 9. Figure 2 、 Figure 3 As shown, the liquid to be evaporated sequentially passes through the second liquid inlet pipe 10, the first liquid inlet pipe 9, and the third liquid inlet pipe 111 into the interior of the multiple nested contact tubes 112. Then, the first steam inlet pipe 5 inputs external steam into the interior of the first evaporation tank 2. The contact tubes 112 increase the contact area between the steam and the liquid to be evaporated, thereby extending the residence time of the liquid to be evaporated in the first evaporation tank 2 and the second evaporation tank 3. This allows for sufficient heat exchange between the steam and the liquid to be evaporated, effectively improving the evaporation efficiency of the liquid in the contact tubes 112.

[0027] The steam delivery assembly 14 includes an exhaust fan 142 fixed to one side of the second evaporator 3. One end of the second steam inlet pipe 6 is connected to the air outlet of the exhaust fan 142. The air inlet of the exhaust fan 142 is connected to the fourth steam outlet pipe 141. The top end of the fourth steam outlet pipe 141 is connected to the third steam outlet pipe 13. Figure 2 、 Figure 3As shown, the exhaust fan 142 is used to generate negative pressure inside the fourth steam outlet pipe 141, so that the heating steam produced by the evaporation component 11 in the first evaporator 2 is sequentially input into the second evaporator 3 through the first steam outlet pipe 113, the third steam outlet pipe 13, the fourth steam outlet pipe 141, and the second steam inlet pipe 6. In this way, the evaporation component 11 in the second evaporator 3 is heated, thus completing a multi-effect heating operation, realizing multiple utilization of energy and achieving energy saving.

[0028] The quick-connect assembly 15 includes a U-shaped seat 151 arranged on the outside of the bottom end of the first liquid inlet pipe 9. There are no less than three U-shaped seats 151, and the multiple U-shaped seats 151 are evenly distributed circumferentially along the outer wall of the first liquid inlet pipe 9. The bottom of the U-shaped seat 151 is connected to the first liquid inlet pipe 9. A strip rod 152 is rotatably connected inside the U-shaped seat 151. The strip rod 152 is hollow in design. A rack 154 is provided inside the strip rod 152. One end of the rack 154 is fixedly connected to a locking buckle 155. The second A locking groove 156 corresponding to the locking buckle 155 is provided on the outer side of the top of the liquid inlet pipe 10, and the locking buckle 155 is located inside the locking groove 156. A transmission cavity 153 is provided on the top of one end of the strip rod 152. A worm gear 157 is rotatably connected inside the transmission cavity 153. The bottom of the worm gear 157 is meshed with the rack 154. A worm 158 is provided on one side of the worm gear 157. The worm 158 is rotatably connected to both sides of the inner wall of the transmission cavity 153 respectively, and one side of the worm gear 158 is meshed with the worm gear 157. Figure 4 、 Figure 5 As shown, when the first liquid inlet pipe 9 and the second liquid inlet pipe 10 need to be docked, the strip rod 152 is driven to rotate by the U-shaped seat 151. After one end of the strip rod 152 reaches above the second liquid inlet pipe 10, the worm 158 is used to drive the worm wheel 157 to rotate, and the worm wheel 157 then drives the locking buckle 155 through the rack 154 to buckle into the locking groove 156. In this way, the first liquid inlet pipe 9 and the second liquid inlet pipe 10 are quickly docked. At the same time, the self-locking characteristics between the worm wheel 157 and the worm 158 are utilized, and the worm wheel 157 and the worm 158 cannot be driven to rotate from one side of the rack 154, thereby improving the docking stability.

[0029] The rack 154 is fixedly connected to the guide blocks 17 on both sides. The inner wall of the strip rod 152 is provided with guide grooves 16 corresponding to the guide blocks 17 on both sides. The guide blocks 17 are located inside the guide grooves 16. Figure 5 As shown, by providing the guide groove 16 and the guide block 17, the rack 154 can maintain smoothness during the reciprocating sliding process, thereby improving the stability of the structure and preventing the rack 154 from extending too much and causing docking failure.

[0030] The sealing assembly 21 includes a docking groove 211 provided at the bottom end of the first liquid inlet pipe 9, and the second liquid inlet pipe 10 is connected to the first liquid inlet pipe 9 through the docking groove 211. A plurality of sealing rings 212 are installed on the outside of the docking groove 211. The sealing rings 212 are in contact with the first liquid inlet pipe 9 and the second liquid inlet pipe 10 respectively. Figure 5 、 Figure 6 As shown, by providing a sealing ring 212 and cooperating with the quick-connect assembly 15, the second liquid inlet pipe 10 can be pulled closer to the side of the first liquid inlet pipe 9, so that the first liquid inlet pipe 9 and the second liquid inlet pipe 10 remain sealed, thereby preventing the liquid to be evaporated from flowing out of the connection between the first liquid inlet pipe 9 and the second liquid inlet pipe 10.

[0031] Working principle: First, the operator uses the quick-connect assembly 15 to quickly connect the first liquid inlet pipe 9 and the second liquid inlet pipe 10. The first liquid inlet pipe 9 will input the liquid to be evaporated into the evaporation assembly 11, which simplifies the docking process and reduces the difficulty of docking, avoiding injuries to the operator due to prolonged close proximity to the first evaporator tank 2 and the second evaporator tank 3. Then, the steam and the liquid to be evaporated are fully exchanged through the evaporation assembly 11. Then, the heated steam produced by the evaporation assembly 11 in the first evaporator tank 2 is input into the second evaporator tank 3 through the steam transmission assembly 14. In this way, the evaporation assembly 11 in the second evaporator tank 3 is heated, realizing multiple energy utilization and achieving energy saving. During this period, the heat insulation assembly 8 reduces the heat exchange rate between the steam in the first evaporator tank 2 and the second evaporator tank 3 and the external environment, effectively slowing down the dissipation of steam heat energy, and also providing a safe working environment for the operator.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multiple-effect evaporation tower comprising a bottom plate (1), a first evaporation tank (2) and a second evaporation tank (3), characterized in that: A plurality of support plates (4) are symmetrically installed at the bottom edge of the first evaporation tank (2) and the bottom edge of the second evaporation tank (3), the bottom ends of the support plates (4) are connected to the bottom plate (1), the bottom of one side of the inner wall of the first evaporation tank (2) is connected to a first steam inlet pipe (5), the bottom of one side of the inner wall of the second evaporation tank (3) is connected to a second steam inlet pipe (6), the outer sides of the first evaporation tank (2) and the outer sides of the second evaporation tank (3) are both provided with a hollow interlayer (7), and further comprising: A heat-insulating assembly (8) is provided inside the hollow interlayer (7) for slowing down the rate of heat loss from the steam; a first liquid inlet pipe (9) is connected to the center of the bottom surface of the hollow interlayer (7); a second liquid inlet pipe (10) is provided at the bottom end of the first liquid inlet pipe (9); an evaporation assembly (11) is provided at the top end of the first liquid inlet pipe (9) for increasing the contact area between the liquid input by the second liquid inlet pipe (10) and the steam; a first sealing top cover (12) is installed at the top opening of the first evaporation tank (2); and a third steam outlet pipe (13) is connected to the top of the first sealing top cover (12); A steam transmission component (14) is provided at the top end of the third steam outlet pipe (13) so that steam can be heated and then input into the second evaporation tank (3). A quick-connect component (15) is provided on the outside of the first liquid inlet pipe (9) for increasing the access speed of the second liquid inlet pipe (10). A sealing component (21) is provided on the outside of the top end of the second liquid inlet pipe (10) for enhancing the sealing performance at the end of the first liquid inlet pipe (9). An atomizer (18) is fixedly connected to the top of the inner cavity of the second evaporation tank (3). A second sealing top cover (19) is installed at the top opening of the second evaporation tank (3). The top of the second sealing top cover (19) is connected to the fifth steam outlet pipe (20).

2. A multiple-effect evaporation tower according to claim 1, characterized in that: The heat insulation component (8) includes a heat preservation layer (81) arranged inside the hollow interlayer (7), a spiral electric heating tube (82) is installed on the inner wall of the heat preservation layer (81), and a heat insulation layer (83) is provided on the outer side of the heat preservation layer (81), the heat insulation layer (83) is made of glass wool material, and the heat preservation layer (81) is made of polyurethane foam material.

3. A multiple-effect evaporation tower according to claim 1, characterized in that: The evaporation assembly (11) comprises a contact tube (112) arranged at the top end of the first liquid inlet pipe (9), wherein at least two contact tubes (112) are provided, and the plurality of contact tubes (112) are concentrically arranged. The contact tubes (112) are nested and combined with each other from large to small. A third liquid inlet pipe (111) is provided below the contact tube (112), and a first steam outlet pipe (113) is provided above the contact tube (112). The contact tube (112) is respectively connected to the third liquid inlet pipe (111) and the first steam outlet pipe (113). The top end of the first steam outlet pipe (113) is connected to the third steam outlet pipe (13), and the bottom end of the third liquid inlet pipe (111) is connected to the first liquid inlet pipe (9).

4. A multiple-effect evaporation tower according to claim 1, characterized in that: The steam transmission component (14) includes an exhaust fan (142) fixed to one side of the second evaporation tank (3); one end of the second steam inlet pipe (6) is connected to the air outlet of the exhaust fan (142); the air inlet of the exhaust fan (142) is connected to a fourth steam outlet pipe (141); and the top end of the fourth steam outlet pipe (141) is connected to the third steam outlet pipe (13).

5. A multiple-effect evaporation tower according to claim 1, characterized in that: The quick-connect assembly (15) includes a U-shaped seat (151) arranged on the outside of the bottom end of the first liquid inlet pipe (9), and the U-shaped seat (151) is provided with no less than three, and the plurality of U-shaped seats (151) are equidistantly distributed along the outer wall of the first liquid inlet pipe (9). The bottom of the U-shaped seat (151) is connected to the first liquid inlet pipe (9), and a strip rod (152) is rotatably connected inside the U-shaped seat (151). The strip rod (152) is hollow in design, and a rack (154) is provided inside the strip rod (152). One end of the rack (154) is fixedly connected to a locking buckle (155). The second liquid inlet pipe (9) is provided with a U-shaped seat (151). A locking groove (156) corresponding to the locking buckle (155) is provided on the outer side of the top end of the liquid pipe (10), and the locking buckle (155) is located inside the locking groove (156). A transmission cavity (153) is provided on the top of one end of the strip rod (152). A worm gear (157) is rotatably connected inside the transmission cavity (153). The bottom of the worm gear (157) is meshed with the rack (154). A worm (158) is provided on one side of the worm gear (157). The worm gear (158) is rotatably connected to both sides of the inner wall of the transmission cavity (153) respectively, and one side of the worm gear (158) is meshed with the worm gear (157).

6. A multiple-effect evaporation tower according to claim 5, characterized in that: Guide blocks (17) are fixedly connected to both sides of the rack (154), and guide grooves (16) corresponding to the guide blocks (17) are provided on both sides of the inner wall of the strip rod (152), and the guide blocks (17) are located inside the guide grooves (16).

7. A multiple-effect evaporation tower according to claim 1, characterized in that: The sealing assembly (21) comprises a docking groove (211) provided at the bottom end of the first liquid inlet pipe (9); the second liquid inlet pipe (10) is connected to the first liquid inlet pipe (9) via the docking groove (211); a plurality of sealing rings (212) are installed on the outside of the docking groove (211); the sealing rings (212) are in contact with the first liquid inlet pipe (9) and the second liquid inlet pipe (10), respectively.

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