Multi-effect evaporator and its circulating evaporation process

Abstract

The application discloses a multi-effect evaporator and a circulating evaporation process thereof, and belongs to the evaporator field. The multi-effect evaporator and the circulating evaporation process thereof comprise an evaporator body, a connecting top cover is arranged on the top of the evaporator body, a water inlet pipe is fixedly connected to the surface of the evaporator body, and a discharge pipe is fixedly connected to the bottom of the evaporator body. The application can comprehensively clean the inside of the evaporator body, prevent the evaporator body from being opened during cleaning and the operation from being complicated, further improve the cleaning efficiency, ensure the self-cleaning degree, prevent the cleaning effect from being affected by the attached water scale and adhered crystal body, further improve the cleaning quality, and enable the water scale and adhered crystal body to be blown away in time during the cleaning process, so that the cleaning difficulty is further reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of evaporator, in particular to a multi-effect evaporator and a circulating evaporation process thereof. BACKGROUND

[0002] In the chemical industry, food industry, pharmaceutical industry and other industrial production, a large amount of water is often needed to be evaporated to obtain concentrated liquid, and the concentration process technology is widely used. Traditionally, a multi-effect evaporator is used to prepare concentrated liquid, that is, several evaporators are connected in series to evaporate and operate to extract concentrated liquid. This multi-effect evaporator device can utilize steam heat energy multiple times, and can improve the utilization rate of heat energy to a certain extent. However, after the evaporator is used for a long time, scale and some crystal bodies are easily generated on the inner wall of the evaporator, which need to be cleaned regularly to prevent affecting the use effect of the evaporator.

[0003] The existing evaporator inner wall produces scale and some crystal bodies, which need to be opened for cleaning. However, it is cumbersome and inconvenient to open, and the cleaning effect is affected by the scale and crystal bodies attached to the long-time simple brush cleaning, which further reduces the cleaning quality. Moreover, the scale and crystal bodies cannot be cleaned in time, which are easily attached to the inner wall of the evaporator body again, further increasing the cleaning difficulty. SUMMARY

[0004] The purpose of the present application is to solve the problem of not easy to clean the scale and crystal bodies on the inner wall in the prior art, and a multi-effect evaporator and a circulating evaporation process thereof are provided.

[0005] In order to achieve the above-mentioned purpose, the technical scheme is as follows:

[0006] A multi-effect evaporator, comprising an evaporator body, a connecting top cover is installed at the top of the evaporator body, a water inlet pipe is fixedly connected to the surface of the evaporator body, a discharge pipe is fixedly connected to the bottom of the evaporator body, and a steam pipe is fixedly connected to the top of the connecting top cover.

[0007] A driving mechanism, the driving mechanism comprises a transmission shaft rotating in the middle of the connecting top cover through a bearing, a driving assembly for driving the transmission shaft is arranged on the connecting top cover, a control box is fixedly connected to the bottom of the transmission shaft, a lead screw is rotatably connected to the inner bottom wall of the control box through a bearing, a threaded cylinder is threadedly connected to the surface of the lead screw, and a driving assembly for driving the lead screw is arranged in the control box.

[0008] A spring cylinder, the spring cylinder is arranged on one side of the threaded cylinder.

[0009] A cleaning mechanism, the cleaning mechanism is arranged at one end of the spring cylinder.

[0010] An air inlet mechanism is arranged on one side of the control box.

[0011] Preferably, the cleaning mechanism comprises a cleaning seat fixed at one end of the spring barrel, a plurality of cleaning brushes are fixedly connected to the surface of the cleaning seat, a fixed rod is fixedly connected to the inside of the cleaning seat, a moving plate is slidingly connected to the surface of the fixed rod, a hollow barrel is fixedly connected to the surface of the moving plate, a cleaning plate is fixedly connected to the end of the hollow barrel extending outside through the cleaning seat, and the cleaning plate is slidingly connected to the surface of the plurality of cleaning brushes.

[0012] Preferably, the air inlet mechanism comprises an air inlet barrel fixed on one side of the control box, a piston is slidingly arranged in the air inlet barrel, a rotating rod is rotatably connected to the top of the piston through a rotating shaft, a rotating disc is rotatably connected to one end of the rotating rod through a rotating shaft, an air outlet pipe is fixedly connected to the bottom of the air inlet barrel, and the air outlet pipe is in communication with the top of the cleaning seat.

[0013] Preferably, the surface of the cleaning plate and the surface of the moving plate are both provided with air outlet holes in communication with both ends of the hollow barrel.

[0014] Preferably, a compression spring is sleeved on the surface of the fixed rod, and the two ends of the compression spring are fixedly connected to the cleaning seat and the moving plate, respectively.

[0015] Preferably, a conical gear one is fixedly connected to the top of the lead screw, a conical gear two is meshingly connected to the surface of the conical gear one, a connecting shaft is fixedly connected to the surface of the conical gear two, and the connecting shaft is rotatably connected to the inside of the control box and fixedly connected to the surface of the rotating disc outside the control box.

[0016] Preferably, the spring barrel comprises an adjusting barrel fixed on one side of the threaded barrel, a supporting spring is fixedly connected to the inside of the adjusting barrel, an adjusting rod is fixedly connected to one end of the supporting spring, and the adjusting rod is slidingly connected in the adjusting barrel and fixedly connected to the cleaning seat at the end extending outside.

[0017] Preferably, an annular groove is formed in the top of the connecting top cover, a guide rod is slidingly connected in the annular groove, and one end of the guide rod is fixedly connected to the control box.

[0018] Preferably, a limiting rod is fixedly connected to the bottom of the control box, a sliding sleeve is slidingly connected to the surface of the limiting rod, and the sliding sleeve is fixedly connected to one side of the threaded barrel.

[0019] A circulating evaporation process of a multi-effect evaporator, and a multi-effect evaporator, mainly comprising the following steps:

[0020] Step A: When the evaporator is not working, if it is necessary to clean the inner wall of the evaporator body, first drive the drive mechanism to rotate the control box under the rotation of the transmission shaft so that the lead screw can be driven to rotate. Then, under the drive of the lead screw, the threaded cylinder moves upward in a threaded manner. During the movement of the threaded cylinder, the cleaning mechanism fixed by the spring cylinder moves. At this time, the cleaning mechanism rotates and moves upward along the inner wall of the evaporator body to complete the cleaning of scale and adhered crystals on the side wall of the evaporator body.

[0021] Step B: The gap between the cleaning mechanism and the inner wall of the evaporator body can be adjusted by the spring cylinder to ensure that the cleaning mechanism fits the inner wall of the evaporator body better and the cleaning effect is better.

[0022] Step C: During the rotation of the cleaning mechanism, the cleaning seat drives the cleaning brush to rotate, which can clean the scale and adhered crystals on the inner wall of the evaporator body. The sliding of the moving plate on the surface of the fixed rod can move the hollow cylinder. During the movement of the hollow cylinder, the cleaning plate can be moved. At this time, the movement of the cleaning plate facilitates the cleaning of the surface of the cleaning plate and prevents the accumulation of scale and adhered crystals on the surface of the cleaning plate, which would lead to poor cleaning effect.

[0023] Compared with the prior art, the present invention provides a multi-effect evaporator and its circulating evaporation process, which has the following beneficial effects:

[0024] 1. This multi-effect evaporator and its circulating evaporation process, driven by a drive shaft, control box, lead screw and threaded cylinder, enable the cleaning mechanism to rotate and move up and down. This design allows for comprehensive cleaning of the inside of the evaporator body, avoiding the cumbersome problem of having to open the evaporator body for cleaning, and further improving cleaning efficiency.

[0025] 2. This multi-effect evaporator and its circulating evaporation process, through the cooperation of the cleaning plate, fixed rod, moving plate and hollow cylinder, enable it to clean the scale and crystals adhering to the surface of the cleaning brush during cleaning. This design ensures its own cleanliness and prevents scale and crystals from affecting the cleaning effect, thus further improving the cleaning quality.

[0026] 3、The multi-effect evaporator and its circulating evaporation process, by the piston sliding in the air inlet cylinder, the high-pressure gas generated can be transmitted to the cleaning seat through the air outlet pipe, so that the cleaning plate can be moved, and the excess gas can be sprayed into the evaporator body, in this way, the cleaning process can be blown, the scale and adhered crystal can be blown away in time, preventing the scale and adhered crystal from adhering to the inner wall of the evaporator body again, further reducing the difficulty of cleaning.

[0027] The parts not involved in the device are the same as or can be realized by the prior art, the present application realizes comprehensive cleaning of the evaporator body, prevents the need to open the evaporator body during cleaning, further improves the cleaning efficiency, ensures the self-cleaning degree, prevents the effect of cleaning from being affected by the scale and adhered crystal, further improves the cleaning quality, and can blow during cleaning, so that the scale and adhered crystal can be blown away in time, further reducing the difficulty of cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A structural diagram of a multi-effect evaporator is proposed for the present application;

[0029] Figure 2 A driving mechanism structural diagram of a multi-effect evaporator is proposed for the present application;

[0030] Figure 3 A cleaning mechanism sectional view structural diagram of a multi-effect evaporator is proposed for the present application;

[0031] Figure 4 An air inlet mechanism structural diagram of a multi-effect evaporator is proposed for the present application;

[0032] Figure 5 A hollow cylinder and air outlet hole structural diagram of a multi-effect evaporator is proposed for the present application;

[0033] Figure 6 A spring cylinder structural diagram of a multi-effect evaporator is proposed for the present application;

[0034] Figure 7 A connecting top cover structural diagram of a multi-effect evaporator is proposed for the present application;

[0035] Figure 8 A front structural diagram of a multi-effect evaporator is proposed for the present application.

[0036] In the figure: 1, evaporator body; 2, connecting top cover; 3, water inlet pipe; 4, discharge pipe; 5, steam pipe; 6, driving mechanism; 7, spring cylinder; 8, cleaning mechanism; 9, air inlet mechanism; 10, annular groove; 11, guide rod; 12, limiting rod; 13, sliding sleeve;

[0037] 61, drive shaft; 62, control box; 63, screw rod; 64, threaded cylinder; 65, bevel gear one; 66, bevel gear two; 67, connecting shaft;

[0038] 71, adjusting cylinder; 72, supporting spring; 73, adjusting rod;

[0039] 81, cleaning seat; 82, cleaning brush; 83, cleaning plate; 84, air outlet hole; 85, fixing rod; 86, moving plate; 87, hollow cylinder; 88, compression spring;

[0040] 91, air inlet cylinder; 92, piston; 93, rotating rod; 94, rotating disc; 95, air outlet pipe. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0042] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] Embodiment 1:

[0044] Reference Figures 1-8 A multi-effect evaporator, comprising an evaporator body 1, a connecting top cover 2 is installed at the top of the evaporator body 1, a water inlet pipe 3 is fixedly connected to the surface of the evaporator body 1, a discharge pipe 4 is fixedly connected to the bottom of the evaporator body 1, a steam pipe 5 is fixedly connected to the top of the connecting top cover 2, and the multi-effect evaporator further comprises;

[0045] A driving mechanism 6; the driving mechanism 6 comprises a drive shaft 61 rotatably connected in the middle of the connecting top cover 2 through a bearing, a driving assembly for driving the drive shaft 61 is arranged on the connecting top cover 2, a control box 62 is fixedly connected to the bottom of the drive shaft 61, a screw rod 63 is rotatably connected to the inner bottom wall of the control box 62 through a bearing, a threaded cylinder 64 is threadedly connected to the surface of the screw rod 63, and a driving assembly for driving the screw rod 63 is arranged in the control box 62.

[0046] spring cylinder 7; the spring cylinder 7 is arranged on one side of the threaded cylinder 64;

[0047] cleaning mechanism 8; the cleaning mechanism 8 is arranged on one end of the spring cylinder 7;

[0048] air inlet mechanism 9; the air inlet mechanism 9 is arranged on one side of the control box 62.

[0049] In the present application, during the evaporation cycle of the evaporator, the worker puts the solution into the evaporator body 1 through the connecting top cover 2, then evaporates, and the waste heat of evaporation is discharged and recovered through the steam pipe 5, and multi-stage recovery evaporation is carried out again, so that the energy consumption caused in the evaporation process can be reduced, and the discharge pipe 4 can discharge the evaporated material.

[0050] Specifically, when it is necessary to clean the inner wall of the evaporator body 1, the control box 62 is first rotated under the rotation of the transmission shaft 61 through the driving of the driving mechanism 6, so as to drive the screw rod 63 to rotate, and then the threaded cylinder 64 is moved upwards in a threaded manner under the driving of the screw rod 63, and the cleaning mechanism 8 fixed to the spring cylinder 7 is moved in the process of movement of the threaded cylinder 64, at this time, the cleaning mechanism 8 rotates and moves upwards along the inner wall of the evaporator body 1, and the scale and the adhered crystal on the side wall of the evaporator body 1 are cleaned;

[0051] It should be noted that the driving assembly is driven by a motor, such as a servo motor or a speed reducer.

[0052] Example 2:

[0053] Referring to Figure 3 and Figure 5 A multi-effect evaporator, comprising an evaporator body 1, a connecting top cover 2 is installed on the top of the evaporator body 1, a water inlet pipe 3 is fixedly connected to the surface of the evaporator body 1, a discharge pipe 4 is fixedly connected to the bottom of the evaporator body 1, a steam pipe 5 is fixedly connected to the top of the connecting top cover 2, and the multi-effect evaporator further comprises;

[0054] The driving mechanism 6 comprises a transmission shaft 61 rotatably arranged in the middle of the connecting top cover 2 through a bearing, a driving assembly for driving the transmission shaft 61 is arranged on the connecting top cover 2, the bottom of the transmission shaft 61 is fixedly connected with a control box 62, the inner bottom wall of the control box 62 is rotatably connected with a screw rod 63 through a bearing, the surface of the screw rod 63 is threadedly connected with a threaded cylinder 64, and the control box 62 is provided with a driving assembly for driving the screw rod 63;

[0055] spring cylinder 7; the spring cylinder 7 is arranged on one side of the threaded cylinder 64;

[0056] cleaning mechanism 8; the cleaning mechanism 8 is arranged on one end of the spring cylinder 7;

[0057] The air inlet mechanism 9 is arranged on one side of the control box 62, the cleaning mechanism 8 comprises a cleaning seat 81 fixed to one end of the spring barrel 7, a plurality of cleaning brushes 82 are fixedly connected to the surface of the cleaning seat 81, a fixing rod 85 is fixedly connected to the inside of the cleaning seat 81, a moving plate 86 is slidably connected to the surface of the fixing rod 85, a hollow cylinder 87 is fixedly connected to the surface of the moving plate 86, a cleaning plate 83 is fixedly connected to one end of the hollow cylinder 87 and extends out of the cleaning seat 81, the cleaning plate 83 is slidably connected to the surface of the plurality of cleaning brushes 82, the surfaces of the cleaning plate 83 and the moving plate 86 are both provided with air outlet holes 84, the air outlet holes 84 are in communication with the two ends of the hollow cylinder 87, and the fixing rod 85 is sleeved with a compression spring 88, and the two ends of the compression spring 88 are fixedly connected with the cleaning seat 81 and the moving plate 86 respectively.

[0058] In the present application, the cleaning mechanism 8 in the cleaning process is further cleaned, the cleaning seat 81 drives the cleaning brushes 82 to rotate in the rotating process of the cleaning mechanism 8, so that the scale and the adhered crystal body in the inner wall of the evaporator body 1 can be cleaned, the hollow cylinder 87 can be moved through the sliding of the moving plate 86 on the surface of the fixing rod 85, the cleaning plate 83 can be moved in the moving process of the hollow cylinder 87, and the surface of the cleaning plate 83 can be cleaned through the movement of the cleaning plate 83, so that the problem of poor cleaning effect caused by the scale and the adhered crystal body attached to the surface of the cleaning plate 83 is prevented.

[0059] Embodiment 3:

[0060] Referring to Figures 2-4 A multi-effect evaporator comprises an evaporator body 1, a connecting top cover 2 is arranged on the top of the evaporator body 1, a water inlet pipe 3 is fixedly connected to the surface of the evaporator body 1, a discharge pipe 4 is fixedly connected to the bottom of the evaporator body 1, a steam pipe 5 is fixedly connected to the top of the connecting top cover 2, and the multi-effect evaporator further comprises:

[0061] The driving mechanism 6 comprises a transmission shaft 61 rotatably arranged in the middle of the connecting top cover 2 through a bearing, a driving assembly for driving the transmission shaft 61 is arranged on the connecting top cover 2, the bottom of the transmission shaft 61 is fixedly connected with a control box 62, the inner bottom wall of the control box 62 is rotatably connected with a lead screw 63 through a bearing, the surface of the lead screw 63 is threadedly connected with a threaded cylinder 64, and a driving assembly for driving the lead screw 63 is arranged in the control box 62.

[0062] The spring barrel 7 is arranged on one side of the threaded cylinder 64.

[0063] The cleaning mechanism 8 is arranged on one end of the spring barrel 7.

[0064] The air inlet mechanism 9 is arranged on one side of the control box 62, the air inlet mechanism 9 comprises an air inlet cylinder 91 fixed on one side of the control box 62, a piston 92 slidingly arranged in the air inlet cylinder 91, a rotating rod 93 rotatably connected to the top of the piston 92 through a rotating shaft, a rotating disc 94 rotatably connected to one end of the rotating rod 93 through a rotating shaft, an air outlet pipe 95 fixedly connected to the bottom of the air inlet cylinder 91, the air outlet pipe 95 being in communication with the top of the cleaning seat 81, a conical gear one 65 fixedly connected to the top of the lead screw 63, a conical gear two 66 meshingly connected to the surface of the conical gear one 65, a connecting shaft 67 fixedly connected to the surface of the conical gear two 66, and the connecting shaft 67 rotatably connected to the surface of the rotating disc 94 through a bearing in the control box 62 and extending out of the control box 62.

[0065] In the present application, the air injection during the cleaning process of the cleaning mechanism 8 is further carried out, the conical gear one 65 is driven to rotate by the rotation of the lead screw 63, the conical gear two 66 is driven to rotate by the conical gear one 65, and the rotating disc 94 fixed to the connecting shaft 67 is driven to rotate again by the conical gear two 66. At this time, the rotating rod 93 is deformed during the rotation of the rotating disc 94, so that the piston 92 can move up and down in the air inlet cylinder 91 in a straight line, thereby compressing the air in the air inlet cylinder 91. The compressed air is transmitted to the cleaning seat 81 through the air outlet pipe 95. When the gas enters the cleaning seat 81, the moving plate 86 is pushed, so that the scale and the adhered crystal on the surface of the cleaning brush 82 can be cleaned in time during the cleaning process of the cleaning brush 82, so as to ensure the cleaning efficiency. The excess gas is sprayed out through the air outlet hole 84, so that the cleaning process of the cleaning brush 82 can be carried out at the same time, the scale and the adhered crystal can be removed in time, and the cleaning quality is further improved.

[0066] Example 4:

[0067] Referring to Figure 6 The spring cylinder 7 comprises an adjusting cylinder 71 fixed on one side of the threaded cylinder 64, a supporting spring 72 fixedly connected in the adjusting cylinder 71, and an adjusting rod 73 fixedly connected to one end of the supporting spring 72. The adjusting rod 73 is slidingly connected in the adjusting cylinder 71 and fixedly connected to the cleaning seat 81 at one end.

[0068] In the present application, the adjusting cylinder 71 is connected to one side of the threaded cylinder 64, and then the adjusting rod 73 is slidingly arranged in the adjusting cylinder 71, so that the supporting spring 72 can be compressed, so as to adjust the fit between the cleaning mechanism 8 and the evaporator body 1, so that the cleaning effect is better.

[0069] Example 5:

[0070] Referring to Figure 1 and Figure 7 The top of the connecting top cover 2 is provided with an annular groove 10, the inside of the annular groove 10 is slidingly connected with a guide rod 11, one end of the guide rod 11 is fixedly connected with a control box 62, the bottom of the control box 62 is fixedly connected with a limiting rod 12, the surface of the limiting rod 12 is slidingly connected with a sliding sleeve 13, and the sliding sleeve 13 is fixedly connected with one side of a threaded cylinder 64.

[0071] In the application, the annular groove 10 is annularly arranged, which can guide the guide rod 11, so as to ensure the stability of the control box 62 during rotation.

[0072] The above is only the preferred embodiment of the application, but the protection scope of the application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the application within the technical range disclosed by the application, which should be covered in the protection scope of the application.

Claims

1. A multi-effect evaporator, comprising an evaporator body (1), a connecting top cover (2) is installed on the top of the evaporator body (1), a water inlet pipe (3) is fixedly connected to the surface of the evaporator body (1), a discharge pipe (4) is fixedly connected to the bottom of the evaporator body (1), and a steam pipe (5) is fixedly connected to the top of the connecting top cover (2), characterized in that, Also include; Driving mechanism (6); the driving mechanism (6) includes the transmission shaft (61) rotating in the middle of the connecting top cover (2) through the bearing, the connecting top cover (2) is provided with a driving assembly for driving the transmission shaft (61), the bottom of the transmission shaft (61) is fixedly connected with the control box (62), the inner bottom wall of the control box (62) is rotatably connected with the lead screw (63) through the bearing, the surface of the lead screw (63) is threadedly connected with the threaded cylinder (64), the control box (62) is provided with a driving assembly for driving the lead screw (63); Spring cylinder (7); the spring cylinder (7) is arranged on one side of the threaded cylinder (64); Cleaning mechanism (8); the cleaning mechanism (8) is arranged on one end of the spring cylinder (7); Air inlet mechanism (9); the air inlet mechanism (9) is arranged on one side of the control box (62); The cleaning mechanism (8) includes a cleaning seat (81) fixed on one end of the spring cylinder (7), a plurality of cleaning brushes (82) are fixedly connected to the surface of the cleaning seat (81), a fixed rod (85) is fixedly connected to the inside of the cleaning seat (81), a moving plate (86) is slidably connected to the surface of the fixed rod (85), a hollow cylinder (87) is fixedly connected to the surface of the moving plate (86), the cleaning plate (83) is fixedly connected to the end of the hollow cylinder (87) and extends outside the cleaning seat (81), and the cleaning plate (83) is slidably connected to the surface of the plurality of cleaning brushes (82); The surfaces of the cleaning plate (83) and the moving plate (86) are both provided with air outlet holes (84) which are communicated with both ends of the hollow cylinder (87); The air inlet mechanism (9) includes an air inlet cylinder (91) fixed on one side of the control box (62), a piston (92) is slidably arranged in the air inlet cylinder (91), a rotating rod (93) is rotatably connected to the top of the piston (92) through a rotating shaft, a rotating disc (94) is rotatably connected to one end of the rotating rod (93) through a rotating shaft, an air outlet pipe (95) is fixedly connected to the bottom of the air inlet cylinder (91), and the air outlet pipe (95) is communicated with the top of the cleaning seat (81).

2. A multiple-effect evaporator as claimed in claim 1, characterized in that The surface of the fixed rod (85) is sleeved with a compression spring (88), and the two ends of the compression spring (88) are fixedly connected with the cleaning seat (81) and the moving plate (86) respectively.

3. A multiple-effect evaporator as claimed in claim 1, wherein The top of the lead screw (63) is fixedly connected with a bevel gear one (65), the surface of the bevel gear one (65) is meshingly connected with a bevel gear two (66), the surface of the bevel gear two (66) is fixedly connected with a connecting shaft (67), and the inside of the control box (62) is rotatably connected with the connecting shaft (67) through a bearing and extends to the outside of the control box (62) and is fixedly connected with the surface of the rotating disc (94).

4. A multiple-effect evaporator as claimed in claim 1, wherein The spring cylinder (7) includes the adjusting cylinder (71) fixed on one side of the threaded cylinder (64), the inside of the adjusting cylinder (71) is fixedly connected with the supporting spring (72), one end of the supporting spring (72) is fixedly connected with the adjusting rod (73), the adjusting rod (73) is slidingly connected in the adjusting cylinder (71) and the adjusting rod (73) extends out and is fixedly connected with the cleaning seat (81).

5. A multiple-effect evaporator as claimed in claim 1, wherein The top of the connecting top cover (2) is provided with an annular groove (10), the inside of the annular groove (10) is slidingly connected with the guide rod (11), one end of the guide rod (11) is fixedly connected with the control box (62).

6. A multiple-effect evaporator as claimed in claim 1, wherein The bottom of the control box (62) is fixedly connected with the limiting rod (12), the surface of the limiting rod (12) is slidingly connected with the sliding sleeve (13), and the sliding sleeve (13) is fixedly connected with one side of the threaded cylinder (64).

7. A process for the cyclic evaporation of a multi-effect evaporator according to claim 2, characterized in that Mainly includes the following steps: Step A; when the evaporator body (1) inner wall needs to be cleaned when the evaporator does not work, first drive the driving mechanism (6) to rotate the control box (62) under the rotation of the transmission shaft (61), so as to drive the screw rod (63) to rotate, then drive the screw rod (63) to move the threaded cylinder (64) upwards, drive the cleaning mechanism (8) fixed on the threaded cylinder (64) to move during the movement of the threaded cylinder (64), at this time, the cleaning mechanism (8) rotates and moves upwards along the inner wall of the evaporator body (1), to clean the scale and adhered crystals on the side wall of the evaporator body (1); Step B; adjust the distance between the cleaning mechanism (8) and the inner wall of the evaporator body (1) through the spring cylinder (7), so as to ensure that the cleaning mechanism (8) is more closely attached to the inner wall of the evaporator body (1), so that the cleaning effect is better; Step C; during the rotation of the cleaning mechanism (8), the cleaning seat (81) drives the cleaning brush (82) to rotate, to clean the scale and adhered crystals on the inner wall of the evaporator body (1), and the sliding of the moving plate (86) on the surface of the fixed rod (85) enables the hollow cylinder (87) to move, and the cleaning plate (83) moves during the movement of the hollow cylinder (87), at this time, the movement of the cleaning plate (83) facilitates the cleaning of the surface of the cleaning plate (83), to prevent the surface of the cleaning plate (83) from being attached with scale and adhered crystals, which causes poor cleaning effect.

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