Multi-effect evaporator and using method thereof

Abstract

The invention relates to the field of evaporators, in particular to a multi-effect evaporator and a using method thereof. Comprising an evaporation tank, the tank side is provided with an exhaust port and a connector, the connector is communicated with a working tank, the exhaust port is communicated with a gas collection tank, and a liquid storage tank is arranged beside the working tank to store wastewater to be treated. A filtering cavity, an evaporating cavity, a vaporizing cavity and a collecting cavity are arranged in the evaporating tank from top to bottom. The filtering mechanism comprises a liquid spraying pipe and a leakage plate, the liquid spraying pipe is coaxially and rotatably connected with the upper end of the tank, and the leakage plate is fixedly connected with the inner wall of the tank and coaxially rotates with the liquid spraying pipe. The evaporation assembly is connected with the liquid spraying pipe and provided with a positioning pipe, a flow guide pipe, a liquid level sensor and a plurality of evaporation mechanisms. The evaporation mechanisms are distributed in the evaporation cavity and each comprise a plurality of vaporization pipes, the flow guide pipes are communicated with the collection cavity and extend out of the tank, and the liquid level sensor is arranged in the collection cavity and used for monitoring the liquid level and guaranteeing stable operation of equipment. According to the device, uneven evaporation heat can be avoided, meanwhile, real-time monitoring of all treatment links is achieved, and the safety of equipment is improved.

Description

Technical Field

[0001] The invention relates to the field of evaporators, in particular to a multiple-effect evaporator and a use method thereof. Background Art

[0002] In the existing multiple-effect evaporator system, the first-effect tank is used as the first-stage evaporator, and the hot steam generated by the heated wastewater is directly used as the heat source of the second-effect tank. The hot steam enters the heater of the second-effect tank, and transfers the heat to the wastewater in the second-effect tank through heat exchange, thereby achieving further evaporation of the wastewater. However, there is a significant problem with this method of directly introducing steam: the inside of the heater is prone to dirt due to impurities, salts or other insoluble substances in the steam. Over time, this dirt will not only reduce the thermal conductivity of the heater, but also affect the condensation efficiency of the steam, thereby affecting the performance and efficiency of the entire evaporation system.

[0003] The existing method of removing dirt is mainly to stop and disassemble the machine and then use manual, mechanical or chemical methods to clean it, which will cause production loss. Therefore, some multi-effect evaporators will change the process conditions to reduce the thermal efficiency to inhibit the formation of dirt, but this process will still increase energy consumption and industrial investment costs, which is not conducive to large-scale production and processing.

[0004] At the same time, when heating wastewater, the existing evaporator mostly introduces the heating steam from one side of the evaporator. However, in this process, unevenly distributed dirt is more likely to be generated inside the evaporator, and as the evaporator runs, the wastewater far from the steam inlet end will not evaporate completely, causing local heat overload in the evaporator, which in turn leads to subsequent failure of the evaporator body. In some large-scale evaporation equipment, due to the unreasonable steam introduction method, the temperature of the area near the steam introduction end is too high, which is easy to cause local corrosion of the equipment, and the wastewater treatment in the area far from the introduction end is not thorough, affecting the overall treatment effect. In addition, local heat overload may also cause safety hazards and threaten the life safety of production personnel.

[0005] Finally, traditional evaporators lack real-time detection of operating status. During wastewater treatment, the wastewater flow is unstable, resulting in uneven distribution in the evaporator, reducing energy utilization and overall evaporation efficiency. Temperature changes in the evaporator are difficult to detect. Abnormal temperatures will accelerate equipment corrosion, affect the evaporation effect of wastewater, cause dirt to accumulate, and increase energy consumption. Steam pressure cannot be monitored in real time. Too high a pressure can easily cause steam leakage, threaten safety and waste energy, while too low a pressure can affect evaporation efficiency and production progress. In addition, it is impossible to fully evaluate the operating status and find potential faults in a timely manner. Once a fault occurs, it will increase maintenance costs and downtime, causing economic losses. Summary of the invention

[0006] Based on this, it is necessary to provide a multiple-effect evaporator and a method for using the same in view of the existing technical problems.

[0007] In order to solve the problems of the prior art, the technical solution adopted by the present invention is: The multiple-effect evaporator comprises an evaporation tank, one side of the evaporation tank is formed with an exhaust port, the other side of the evaporation tank is formed with a connection port, one side of the evaporation tank is provided with a working tank connected to the connection port, the other side of the evaporation tank is provided with a gas collecting tank connected to the exhaust port, and the side of the working tank close to the gas collecting tank is provided with a liquid storage tank, and the wastewater to be treated is stored in the liquid storage tank; The interior of the evaporation tank is formed with a filter chamber, an evaporation chamber, a vaporization chamber and a collection chamber from top to bottom. The evaporation chamber is connected to the exhaust port, and the vaporization chamber is connected to the connection port. The filtering mechanism is connected to the evaporation tank and includes a liquid spraying pipe and a seepage plate. The liquid spraying pipe is arranged in the filtering chamber and is coaxially rotatably connected to the upper end of the evaporation tank. The seepage plate is arranged in the filtering chamber and is fixedly connected to the inner wall of the evaporation tank. The seepage plate is coaxially rotatably connected to the liquid spraying pipe. The evaporation assembly is connected to the liquid spray pipe, and includes a positioning tube, a guide tube, a liquid level sensor and a plurality of evaporation mechanisms. The liquid level sensor is arranged in the collecting chamber and is fixedly connected to the side wall of the positioning tube. The lower end of the positioning tube passes through the collecting chamber and extends to the outside of the evaporation tank, and the upper end is fixedly connected to the lower end of the liquid spray pipe coaxially. A plurality of jet holes are arranged in a circular array on the same horizontal plane on the upper part of the positioning tube. A plurality of evaporation mechanisms are arranged in the evaporation chamber at equal angles along the circumferential direction of the evaporation tank. Each evaporation mechanism includes a plurality of vaporization tubes. One end of the guide tube is connected to the collecting chamber, and the other end extends downward out of the evaporation tank.

[0008] Furthermore, the filtering mechanism also includes a motor, a first pulley, a second pulley and a liquid inlet pipe. The liquid spray pipe is formed with a plurality of liquid spray holes at equal angles along the circumferential direction. The liquid inlet pipe is coaxially fixedly connected to the upper end of the evaporation tank and is rotatably connected to the liquid spray pipe. A flow sensor is fixedly connected to the upper end of the liquid inlet pipe. The flow sensor is used to monitor the flow between the liquid storage tank and the evaporation tank. The motor is fixedly connected to the side wall of the evaporation tank through a motor frame, the first pulley is coaxially fixedly connected to the output end of the motor, the second pulley is coaxially fixedly connected to the liquid spray pipe and is connected to the first pulley through a belt transmission.

[0009] Furthermore, the filtering mechanism also includes a filter screen, a leakage plate and a plurality of turbidity sensors. The filter screen is fixedly arranged at the upper end of the leakage plate and is rotatably connected to the liquid spray pipe coaxially. The plurality of turbidity sensors are arranged in an array at equal angles along the circumferential direction below the filter screen. The plurality of turbidity sensors are respectively fixedly connected to the outer wall of the evaporation tank. The leakage plate is formed with a plurality of strip-shaped perforations at equal angles along the circumferential direction, and two triangular liquid baffle plates are symmetrically fixedly connected in each strip-shaped perforation.

[0010] Furthermore, the evaporation component also includes an injection tube, two positioning disks, two positioning gears, a plurality of connecting columns and a plurality of temperature sensors. The plurality of temperature sensors are arranged in an array at equal angles along the circumferential direction of the inner wall of the evaporation chamber. The injection tube is arranged in the evaporation chamber and is fixedly connected to the positioning tube coaxially. The injection tube is formed with perforations that are connected to the plurality of injection holes in a one-to-one correspondence. The two positioning disks are symmetrically arranged at the two ends of the injection tube. The upper positioning disk is fixedly connected to the liquid spray tube coaxially, and the lower positioning disk is rotatably connected to the positioning tube coaxially. A plurality of connecting columns are arranged in an array at equal angles along the circumferential direction of the positioning disks. The two ends of the connecting columns are respectively fixedly connected to the two positioning disks. The two positioning gears are respectively arranged on one side of the two positioning disks close to the injection tube, and the two positioning gears are respectively fixedly connected to the injection tube coaxially.

[0011] Furthermore, the evaporation mechanism also includes a transfer column, two transfer discs and two transfer gear rings. The two transfer discs are rotatably connected to the two positioning discs respectively. The two ends of the transfer column are respectively coaxially fixed to the two transfer discs. A number of vaporization tubes are evenly distributed on the sides of the transfer column. The two ends of the vaporization tubes are respectively coaxially fixed to the two transfer discs. The two transfer gear rings are respectively coaxially fixed to the two transfer discs. The two transfer gear rings are respectively meshed with corresponding positioning gears.

[0012] Furthermore, the evaporation component also includes a sliding pad, a telescopic tube, a connecting tube, a reset spring and a plurality of pressure sensors. The sliding pad is arranged in the vaporization chamber and is located at the lower end of the connecting port. The plurality of pressure sensors are arranged in an array at equal angles along the circumferential direction of the upper end of the sliding pad. The telescopic tube is sleeved on the outside of the positioning tube. The upper end of the telescopic tube is fixedly connected to the positioning disk, and the lower end is fixedly connected to the sliding pad. The connecting tube is arranged on the inside of the telescopic tube, and the lower end of the connecting tube is fixedly connected to the sliding pad. The reset spring is sleeved on the outside of the positioning tube, and the upper end of the reset spring is fixedly connected to the positioning disk.

[0013] Furthermore, the evaporation component also includes a plurality of scraper sleeves and a plurality of scraper cores. The plurality of scraper sleeves are arranged in an array at equal angles along the circumferential direction of the sliding pad. The upper ends of the plurality of scraper sleeves are fixedly connected to the lower end of the positioning disk. The plurality of scraper cores are elastically connected to the plurality of scraper sleeves, respectively. The lower ends of the plurality of scraper cores are respectively abutted against the upper end of the sliding pad. The scraper sleeves and the scraper cores are evenly spaced with a plurality of strip-shaped avoidance holes. The plurality of strip-shaped avoidance holes can facilitate the flow of steam in the vaporization chamber.

[0014] Furthermore, the evaporation component also includes a strip liquid tube, a transfer pad and a discharge baffle. The strip liquid tube is fixedly connected to the sliding pad, the transfer pad is fixedly connected to the middle of the strip liquid tube, one end of the discharge baffle is against the transfer pad, and the other end is hinged to the transfer pad through a torsion spring.

[0015] The method for using the multiple-effect evaporator is implemented by using the above-mentioned multiple-effect evaporator, comprising the following steps: S1: The operator starts the device, and the wastewater to be treated flows from the liquid storage tank into the evaporation tank, and then the wastewater is sprayed into the filter chamber in a circular shape after passing through the rotating liquid spray pipe; S2: The wastewater filtered by the filter chamber enters the evaporation chamber. The positioning pipe introduces heating steam into the evaporation chamber. The heating steam heats the wastewater in the vaporization tubes. The liquid level sensor monitors the liquid level in the collection chamber, controls the rotation speed of the liquid spraying pipe, and drives the vaporization tubes to rotate synchronously. The wastewater forms a spiral liquid film in the rotating vaporization tube, which accelerates the vaporization efficiency and prevents scaling. S3: The steam generated by vaporization will be concentrated in the vaporization chamber and flow into the working tank through the connecting port, while the remaining condensate and dirt will be discharged from the guide pipe after passing through the strip liquid pipe.

[0016] In step S2: the rotation speed of the liquid spraying pipe is 5-15 rpm.

[0017] Compared with the prior art, the present invention has the following beneficial effects: Firstly, the device uses the positioning tube to deliver the heating steam from the middle of the evaporation chamber in the evaporation tank, so that the evaporation chamber is heated from the inside to the outside. In this process, a number of vaporization tubes can move along the circumferential direction of the positioning tube to ensure that the heating steam can evenly heat the wastewater in the vaporization tube and reduce the generation of uneven dirt. Second, the device realizes the evaporation of wastewater through several evaporation mechanisms of separate design. When the wastewater passes through the filter screen, it can be filtered for the first time to reduce the number of large-volume impurities in the wastewater in advance. Then, when the wastewater passes through the seepage plate and flows downward, the triangular liquid baffle plate can reduce the flow of the wastewater, so that when the wastewater falls on the transfer disc and passes through the vaporization tube, the wastewater can flow down along the wall of the vaporization tube in the form of a film. At this time, the wastewater can be quickly heated by the heated steam, thereby improving the steam generation efficiency. When a certain evaporation mechanism has the problem of excessive scaling, the operator only needs to replace the corresponding vaporization tube, thereby improving the work efficiency. Thirdly, when the steam generated by the device flows into the working tank through the connection port, the waste liquid remaining after the waste water evaporates will flow downward from the strip liquid pipe into the collecting chamber, and because the scraper core will move along the circumferential direction of the sliding pad, the scraper core can also scrape off the dirt attached to the sliding pad and push the waste liquid through the strip liquid pipe, so as to avoid the waste liquid and dirt remaining on the sliding pad, thereby affecting the subsequent cleaning work; Fourthly, the present invention is equipped with a variety of sensors to monitor each process of the device operation. The flow sensor monitors the wastewater flow in real time to ensure the stability of the wastewater flow. The film-forming downstream effect on the inner wall of the vaporization tube is better, and the evaporation efficiency and stability are improved. The temperature sensor monitors the heating steam and wastewater temperature. When an abnormality occurs, it promptly reminds the operator to adjust the steam flow to avoid local overheating or overcooling, prevent scaling and incomplete evaporation, and ensure stable operation of the equipment. The pressure sensor monitors the steam pressure in the vaporization chamber, adjusts the steam entry amount when it is close to the upper limit, and cooperates with structures such as sliding pads to maintain stable pressure to ensure steam generation and equipment safety. Each sensor accurately locates each process, which is convenient for operators to promptly discover potential faults and hidden dangers to avoid safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention when it is used; Figure 2 It is a three-dimensional structural schematic diagram of the present invention; Figure 3 It is a partial three-dimensional cross-sectional structural schematic diagram of the present invention; Figure 4 yes Figure 3 A magnified view of the structure at center; Figure 5 yes Figure 3 A magnified view of the structure at B in the middle; Figure 6 is a planar half-section view of the present invention; Figure 7 It is a three-dimensional half-section diagram of the present invention; Figure 8 yes Figure 7 A magnified view of the structure at C in the middle; Fig. 9 yes Figure 7 A magnified view of the structure at D in the middle; Fig.10 yes Figure 7 Enlarged view of the structure at point E in the middle.

[0019] The numbers in the figure are: 1. Evaporation tank; 2. Exhaust port; 3. Connecting port; 4. Filter chamber; 5. Evaporation chamber; 6. Vaporization chamber; 7. Collection chamber; 8. Filter mechanism; 9. Motor; 10. First pulley; 11. Second pulley; 12. Liquid inlet pipe; 13. Liquid spray pipe; 14. Liquid spray hole; 15. Filter screen; 16. Seepage plate; 17. Strip perforation; 18. Triangular liquid baffle plate; 19. Evaporation assembly; 20. Positioning tube; 21. Jet pipe; 22. Jet hole; 23. Positioning disc; 24. Positioning gear; 25. Connecting column; 26. Evaporation mechanism ; 27. Adapter disc; 28. Vaporization pipe; 29. ​​Adapter column; 30. Adapter gear ring; 31. Sliding pad; 32. Telescopic tube; 33. Connecting tube; 34. Reset spring; 35. Scraper sleeve; 36. Strip avoidance hole; 37. Scraper core; 38. Strip liquid pipe; 39. Transfer pad; 40. Unloading baffle; 41. Guide pipe; 42. Flow sensor; 43. Working tank; 44. Liquid storage tank; 45. Gas collecting tank; 46. Turbidity sensor; 47. Temperature sensor; 48. Pressure sensor; 49. Liquid level sensor. DETAILED DESCRIPTION

[0020] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] refer to Figures 1 to 10 The multi-effect evaporator comprises an evaporation tank 1, an exhaust port 2 is formed on one side of the evaporation tank 1, and a connection port 3 is formed on the other side. A working tank 43 connected to the connection port 3 is arranged on one side of the evaporation tank 1, and a gas collecting tank 45 connected to the exhaust port 2 is arranged on the other side. A liquid storage tank 44 is arranged on one side of the working tank 43 close to the gas collecting tank 45, and wastewater to be treated is stored in the liquid storage tank 44; The interior of the evaporation tank 1 is formed with a filter chamber 4, an evaporation chamber 5, a vaporization chamber 6 and a collection chamber 7 from top to bottom. The evaporation chamber 5 is connected to the exhaust port 2, and the vaporization chamber 6 is connected to the connection port 3 (refer to Figure 6 ); The filtering mechanism 8 is connected to the evaporation tank 1, and includes a liquid spraying pipe 13 and a leakage plate 16. The liquid spraying pipe 13 is arranged in the filtering chamber 4 and is coaxially rotatably connected to the upper end of the evaporation tank 1. The leakage plate 16 is arranged in the filtering chamber 4 and is fixedly connected to the inner wall of the evaporation tank 1. The leakage plate 16 is coaxially rotatably connected to the liquid spraying pipe 13. The evaporation assembly 19 is connected to the liquid spraying pipe 13, and includes a positioning pipe 20, a guide pipe 41, a liquid level sensor 49 and a plurality of evaporation mechanisms 26. The liquid level sensor 49 is arranged in the collecting chamber 7 and is fixedly connected to the side wall of the positioning pipe 20. The lower end of the positioning pipe 20 passes through the collecting chamber 7 and extends to the outside of the evaporation tank 1, and the upper end is fixedly connected to the lower end of the liquid spraying pipe 13 coaxially. A plurality of jet holes 22 are arranged in a circular array on the same horizontal plane on the upper part of the positioning pipe 20. A plurality of evaporation mechanisms 26 are arranged in the evaporation chamber 5 at equal angles along the circumferential direction of the evaporation tank 1. Each evaporation mechanism 26 includes a plurality of vaporization pipes 28. One end of the guide pipe 41 is connected to the collecting chamber 7, and the other end extends downward out of the evaporation tank 1.

[0022] The device also includes a wireless communication module, a cloud server and a user terminal APP. The wireless communication module transmits various parameters during the operation of the device, such as wastewater flow, steam temperature, pressure, and the operating status of each component, to the cloud server in real time. Users can remotely view the operation of the device anytime and anywhere through the APP on terminal devices such as mobile phones or computers. At the same time, users can also remotely operate the device on the APP, such as starting and stopping the motor 9, adjusting the steam flow and temperature, etc., to achieve intelligent remote management of the multi-effect evaporator and improve the convenience and timeliness of operation. When the device is in operation, when waste water enters the evaporation tank 1 through the liquid spray pipe 13, the waste water will be sprayed from the liquid spray pipe 13 into the filter chamber 4, and then the waste water will flow downward through the seepage plate 16. At this time, the flow rate of the waste water will decrease, ensuring that when the waste water passes through the plurality of evaporation mechanisms 26, the waste water can flow downward from the inner wall of the vaporization tube 28 in the form of a film. In this process, the steam used for heating is sprayed from the positioning tube 20 into the evaporation chamber 5, and the plurality of vaporization tubes 28 located in the evaporation chamber 5 are heated by the heating steam, so as to vaporize the waste water inside the vaporization tube 28. The vaporized steam will be concentrated in the vaporization chamber 6 and flow into the working tank 43 through the connecting port 3, and the residual concentrate and dirt will be discharged from the guide tube 41 under the action of the evaporation component 19. When the concentrate is processed, the liquid level sensor 49 monitors the liquid level of the concentrate in real time. When the liquid level reaches the set value, the operator is promptly reminded to handle the concentrate to prevent the collection chamber 7 from overflowing and affecting the normal operation of the equipment, ensuring the continuous and stable operation of the device. At the same time, the liquid level sensor 49 monitors the liquid level in the collection chamber 7 and controls the rotation speed of the spray pipe 13.

[0023] In order to drive the liquid spray pipe 13 to rotate so as to spray the wastewater evenly into the filter chamber 4, the following features are also specifically provided: The filtering mechanism 8 also includes a motor 9, a first pulley 10, a second pulley 11 and a liquid inlet pipe 12. The liquid spraying pipe 13 is formed with a plurality of liquid spraying holes 14 at equal angles along the circumferential direction. The liquid inlet pipe 12 is coaxially fixedly connected to the upper end of the evaporation tank 1 and is rotatably connected to the liquid spraying pipe 13. A flow sensor 42 is fixedly connected to the upper end of the liquid inlet pipe 12. The flow sensor 42 is used to monitor the flow between the liquid storage tank 44 and the evaporation tank 1. The motor 9 is fixedly connected to the side wall of the evaporation tank 1 through a motor frame. The first pulley 10 is coaxially fixedly connected to the output end of the motor 9. The second pulley 11 is coaxially fixedly connected to the liquid spraying pipe 13 and is connected to the first pulley 10 through a belt. After the motor 9 is started, the motor 9 will drive the second pulley 11 to rotate through the first pulley 10. After the second pulley 11 rotates, it will drive the liquid spraying pipe 13 to rotate. During the rotation process, the liquid spraying pipe 13 will evenly spray wastewater from the plurality of liquid spraying holes 14 to prepare for the subsequent filtration and evaporation of wastewater.

[0024] The flow sensor 42 installed at the liquid inlet pipe 12 will monitor the wastewater flow data entering the liquid spray pipe 13 in real time to ensure that the wastewater flow is stable within an appropriate range, thereby improving the evaporation efficiency and stability.

[0025] In order to filter impurities in the wastewater, the specific structure of the seepage plate 16 is further supplemented, and the following features are specifically set: The filter mechanism 8 also includes a filter screen 15, a seepage plate 16 and a plurality of turbidity sensors 46. The filter screen 15 is fixedly arranged at the upper end of the seepage plate 16 and is coaxially rotatably connected with the liquid spraying pipe 13. The plurality of turbidity sensors 46 are arranged in an array at equal angles along the circumferential direction below the filter screen 15. The plurality of turbidity sensors 46 are respectively fixedly connected to the outer wall of the evaporation tank 1. The seepage plate 16 is formed with a plurality of strip-shaped perforations 17 at equal angles along the circumferential direction. Two triangular liquid baffles 18 are respectively fixedly connected in a symmetrical state in each strip-shaped perforation 17. After the wastewater is uniformly sprayed out from the plurality of liquid spraying holes 14, the wastewater will pass through the filter screen 15 and fall on the seepage plate 16. The filter screen 15 can clean the large particles of impurities in the wastewater and reduce the dirt generated after the wastewater is subsequently vaporized. When the wastewater passes through the plurality of strip-shaped perforations 17, the triangular liquid baffles 18 arranged in the strip-shaped perforations 17 will control the flow rate of the wastewater so that the wastewater can flow down in a film-like manner along the inner wall of the plurality of vaporization pipes 28. The turbidity sensor 46 is installed below the filter screen 15 in the filter chamber 4 to monitor the turbidity of the wastewater in real time. If the turbidity exceeds the normal range, it means that the filtering effect of the filter screen 15 has decreased or there are too many impurities in the wastewater. At this time, the data can be transmitted to the user terminal APP through the wireless communication module to remind the operator to clean or replace the filter screen 15, ensure that the impurity content of the wastewater entering the evaporation chamber 5 is within a reasonable range, reduce dirt generation, and maintain stable operation of the equipment.

[0026] In order to supplement the specific structure of the evaporation component 19, the following features are also specifically provided: The evaporation assembly 19 also includes an injection tube 21, two positioning disks 23, two positioning gears 24, a plurality of connecting columns 25 and a plurality of temperature sensors 47. The plurality of temperature sensors 47 are arranged in an array at equal angles along the circumferential direction of the inner wall of the evaporation chamber 5. The injection tube 21 is arranged in the evaporation chamber 5 and is coaxially fixedly connected to the positioning tube 20. The injection tube 21 is formed with perforations that are connected to the plurality of injection holes 22 in a one-to-one correspondence. The two positioning disks 23 are symmetrically arranged at the two ends of the injection tube 21. The upper positioning disk 23 is coaxially fixedly connected to the liquid injection tube 13, and the lower positioning disk 23 is rotatably connected to the positioning tube 20. The plurality of connecting columns 25 are arranged in an array at equal angles along the circumferential direction of the positioning disks 23. The two ends of the connecting columns 25 are respectively fixedly connected to the two positioning disks 23. The two positioning gears 24 are respectively arranged on one side of the two positioning disks 23 close to the injection tube 21, and the two positioning gears 24 are respectively fixedly connected to the injection tube 21 coaxially. A number of temperature sensors 47 are used to monitor the real-time temperature of the heating steam and wastewater, and accurately grasp the heat exchange during the evaporation process. When the temperature is abnormal, the operator can adjust the steam flow in time to avoid local overheating or insufficient temperature, ensure the stability of the wastewater evaporation efficiency, and prevent scaling or incomplete evaporation caused by temperature problems. When the liquid spray pipe 13 rotates, the liquid spray pipe 13 will drive the positioning disc 23 fixed to it to rotate. Since the two positioning discs 23 are connected by a number of connecting columns 25, the two positioning discs 23 will rotate synchronously.

[0027] In order to facilitate the evaporation of wastewater in the plurality of vaporization tubes 28, the following features are also specifically provided: The evaporation mechanism 26 further includes an adapter column 29, two adapter discs 27 and two adapter gear rings 30. The two adapter discs 27 are rotatably connected to the two positioning discs 23 respectively (such as Figure 4 As shown in the figure, the two ends of the transfer column 29 are respectively fixedly connected to the two transfer discs 27 coaxially, and a plurality of vaporization tubes 28 are evenly distributed beside the transfer column 29. The two ends of the plurality of vaporization tubes 28 are respectively fixedly connected to the two transfer discs 27 coaxially, and the two transfer gear rings 30 are respectively fixedly connected to the two transfer discs 27 coaxially, and the two transfer gear rings 30 are respectively meshed with the corresponding positioning gears 24. During the rotation of the positioning disc 23, the positioning disc 23 will drive the corresponding transfer disc 27 to move along the circumferential direction of the positioning disc 23. During this process, since the positioning gear 24 is fixedly connected, the positioning gear 24 will drive the transfer disc 27 to rotate through the transfer gear ring 30, and then the plurality of vaporization tubes 28 fixedly connected to the transfer disc 27 will rotate along the circumferential direction of the transfer disc 27, so as to achieve high-efficiency evaporation of wastewater. During this process, in order to prevent the vaporization tubes 28 from being damaged due to excessive torque when the two adapter discs 27 rotate, the adapter column 29 can improve the synchronization rate of the two adapter discs 27 .

[0028] As can be seen from the foregoing, since the heating steam is ejected from the plurality of jet holes 22 located in the middle of the positioning disk 23 at this time, the heating steam can evenly heat the rotating vaporization tube 28, thereby reducing the problem of uneven heat inside the evaporation chamber 5, and since the plurality of vaporization tubes 28 work independently of each other, even if scaling is formed inside the vaporization tube 28, it will not affect the normal operation of the remaining vaporization tubes 28, thereby preventing scaling from affecting the operation of the evaporation process.

[0029] In order to realize that when the pressure in the vaporization chamber 6 is too high, the volume of the vaporization chamber 6 can be adaptively changed to prevent affecting the generation of steam in the vaporization tubes 28, the following features are specifically set: The evaporation assembly 19 further includes a sliding pad 31, a telescopic tube 32, a connecting tube 33, a reset spring 34 and a plurality of pressure sensors 48. The sliding pad 31 is arranged in the vaporization chamber 6 and at the lower end of the connection port 3. The plurality of pressure sensors 48 are arranged in an array at equal angles along the circumferential direction of the upper end of the sliding pad 31. The telescopic tube 32 is sleeved on the outside of the positioning tube 20. The upper end of the telescopic tube 32 is fixedly connected to the positioning disk 23, and the lower end is fixedly connected to the sliding pad 31. The connecting tube 33 is arranged inside the telescopic tube 32. The lower end of the connecting tube 33 is fixedly connected to the sliding pad 31. The reset spring 34 is sleeved on the outside of the positioning tube 20. The upper end of the reset spring 34 is fixedly connected to the positioning disk 23. When there is too much steam inside the vaporization chamber 6, in order to prevent the steam inside the vaporization chamber 6 from affecting the generation of steam in the vaporization tube 28, the excessive steam will push the sliding pad 31 to move downward to prevent the pressure inside the vaporization chamber 6 from being too high. When the sliding pad 31 moves, the sliding pad 31 drives the reset spring 34 to deform through the connecting tube 33, so that the reset spring 34 can subsequently drive the sliding pad 31 to move upward and reset. In this process, a number of pressure sensors 48 monitor the internal steam pressure in real time. In conjunction with the sliding pad 31, the telescopic tube 32 and other structures, when the pressure approaches the set upper limit, the steam inlet amount is adjusted in time to ensure that the steam generation in the vaporization tube 28 is not affected, so as to prevent equipment damage or reduced evaporation efficiency due to excessive pressure.

[0030] In order to scrape off the concentrate and dirt settled on the sliding pad 31, the following features are also specifically provided: The evaporation assembly 19 further includes a plurality of scraper sleeves 35 and a plurality of scraper cores 37. The plurality of scraper sleeves 35 are arranged in an array at equal angles along the circumferential direction of the sliding pad 31. The upper ends of the plurality of scraper sleeves 35 are fixedly connected to the lower end of the positioning disc 23. The plurality of scraper cores 37 are elastically connected to the plurality of scraper sleeves 35, respectively. The lower ends of the plurality of scraper cores 37 are respectively against the upper end of the sliding pad 31 (refer to Figure 3 and Figure 6), a plurality of strip-shaped avoidance holes 36 are formed at equal intervals on the scraper cover 35 and the scraper core 37, and the plurality of strip-shaped avoidance holes 36 can facilitate the flow of steam in the vaporization chamber 6. During the rotation of the positioning disc 23, the positioning disc 23 will move through the plurality of scraper covers 35, and the plurality of scraper covers 35 will respectively drive the plurality of scraper cores 37 to move, and the plurality of scraper cores 37 will scrape off the concentrate and dirt attached to the upper end of the sliding pad 31 when moving, so as to prevent the concentrate and dirt from remaining on the sliding pad 31.

[0031] In order to facilitate the discharge of the concentrate and dirt on the sliding pad 31 from the evaporation tank 1, the following features are also specifically provided: The evaporation assembly 19 further includes a strip liquid pipe 38, a transfer pad 39 and a material discharge baffle 40. The strip liquid pipe 38 is fixedly connected to the sliding pad 31, and the transfer pad 39 is fixedly connected to the middle of the strip liquid pipe 38. One end of the material discharge baffle 40 abuts against the transfer pad 39, and the other end is hinged to the transfer pad 39 through a torsion spring (refer to Fig.10 When the scraper core 37 scrapes off the concentrate and dirt, the concentrate and dirt will fall from the strip liquid pipe 38 to the upper end of the material discharge baffle 40. At this time, the material discharge baffle 40 will not tilt under the action of the torsion spring. When the concentrate and dirt increase, the material discharge baffle 40 tilts and releases the concentrate and dirt, so that the concentrate and dirt can pass through the strip liquid pipe 38 and fall into the collection chamber 7.

[0032] It should be noted that, in this process, since the condensate and dirt will settle at the bottom of the vaporization chamber 6, the condensate and dirt will move into the strip liquid pipe 38 before the steam, thereby preventing the steam from leaking from below the strip liquid pipe 38. At the same time, when the pressure inside the vaporization chamber 6 increases, the inclination angle of the discharge baffle 40 increases under the action of the pressure, thereby accelerating the discharge of the condensate and dirt and quickly adjusting the pressure inside the vaporization chamber 6.

[0033] The method of using the multiple-effect evaporator includes the following steps: S1: The operator starts the device, and the wastewater to be treated flows from the liquid storage tank 44 into the evaporation tank 1, and then the wastewater is sprayed into the filter chamber 4 in a circular shape through the rotating liquid spray pipe 13; S2: The wastewater filtered by the filter chamber 4 enters the evaporation chamber 5, and the positioning pipe 20 passes heating steam into the evaporation chamber 5. The heating steam heats the wastewater in the plurality of vaporization tubes 28. The liquid level sensor 49 monitors the liquid level in the collection chamber 7, controls the rotation speed of the liquid spraying pipe 13, and drives the plurality of vaporization tubes 28 to rotate synchronously. The wastewater forms a spiral liquid film in the rotating vaporization tube 28, which accelerates the vaporization efficiency and prevents scaling. S3: The vapor generated by vaporization will be concentrated in the vaporization chamber 6 and flow into the working tank 43 through the connecting port 3, while the remaining condensate and dirt will be discharged from the guide pipe 41 after passing through the strip liquid pipe 38.

[0034] In step S2: The rotation speed of the liquid spray pipe 13 is 5-15 rpm; The steam pressure of the positioning tube 20 is controlled by the actual temperature feedback in the evaporation chamber 5, with a control accuracy of ±2°C, ensuring that the wastewater temperature is maintained within the range of ±3°C from the boiling point.

[0035] The device also includes a wireless communication module, a cloud server and a user terminal APP. The wireless communication module transmits various parameters during the operation of the device, such as wastewater flow, steam temperature, pressure, and the operating status of each component, to the cloud server in real time. Users can remotely view the operation of the device anytime and anywhere through the APP on terminal devices such as mobile phones or computers. At the same time, users can also remotely operate the device on the APP, such as starting and stopping the motor 9, adjusting the steam flow and temperature, etc., to achieve intelligent remote management of the multi-effect evaporator and improve the convenience and timeliness of operation.

[0036] When the device is in operation, the wastewater to be treated flows from the liquid storage tank 44 through the liquid inlet pipe 12 into the liquid spray pipe 13. The flow sensor 42 at the upper end of the liquid inlet pipe 12 monitors the wastewater flow data entering the liquid spray pipe 13 in real time and accurately, and transmits it to the controller. The controller ensures that the wastewater flow rate is stable within a suitable range according to the preset optimal flow range, thereby more accurately controlling the effect of the wastewater flowing down the inner wall of the vaporization pipe 28 when passing through the evaporation mechanism 26, thereby improving the evaporation efficiency and stability.

[0037] Wastewater is sprayed into the filter chamber 4 from the spray hole 14 of the spray pipe 13. The turbidity sensor 46 above the filter screen 15 monitors the initial turbidity of the wastewater. If the turbidity is abnormal, an alarm is sent to the user terminal APP through the wireless communication module, prompting attention to the impurities in the wastewater. The wastewater passes through the filter screen 15, and the filter screen 15 intercepts large particles of impurities to reduce the risk of subsequent dirt generation. Afterwards, the wastewater passes through the seepage plate 16, and the triangular liquid baffle plate 18 in the strip perforation 17 reduces the flow of wastewater, ensuring that when the wastewater passes through the evaporation mechanism 26, it can flow down the inner wall of the vaporization tube 28 to form a film.

[0038] At the same time, since the motor 9 is started, the motor 9 will drive the plurality of vaporization tubes 28 to rotate along the direction of the positioning disk 23. At the same time, each vaporization tube 28 connected to the adapter disk 27 will also rotate along the circumferential direction of the positioning disk 23. In this process, the steam used for heating is sprayed from the positioning tube 20 into the evaporation chamber 5, and the plurality of vaporization tubes 28 located in the evaporation chamber 5 will be heated by the heating steam, so as to vaporize the wastewater inside the vaporization tube 28. At the same time, since the heating steam is sprayed from the plurality of jet holes 22 in the center of the positioning disk 23, the heating steam will evenly heat the rotating vaporization tube 28 to avoid uneven heat in the evaporation chamber 5. And because the plurality of vaporization tubes 28 work independently, even if a vaporization tube 28 is scaled, it will not affect other vaporization tubes 28, thereby ensuring a smooth evaporation process.

[0039] In the vaporization chamber 6, the pressure sensors 48 arranged in equal angles along the circumferential direction of the upper end of the sliding pad 31 monitor the steam pressure in real time. When there is too much steam and the pressure is close to the set upper limit, the pressure sensor 48 transmits a signal to the controller, and the controller adjusts the amount of steam entering. At the same time, the steam pushes the sliding pad 31 to move downward. When the sliding pad 31 moves, it drives the connecting pipe 33 to deform the reset spring 34, so that the reset spring 34 can drive the sliding pad 31 to reset.

[0040] The steam generated by vaporization will be concentrated in the vaporization chamber 6 and flow into the working tank 43 through the connection port 3, while the remaining concentrate and dirt will be discharged from the guide tube 41 after passing through the strip liquid pipe 38. During this process, the liquid level sensor 49 in the collection chamber 7 monitors the liquid level of the concentrate in real time and controls the rotation speed of the liquid spray pipe 13. When the liquid level reaches the set value, a reminder is sent to the user terminal APP through the wireless communication module, and the operator handles the concentrate in time to prevent the collection chamber 7 from overflowing and ensure the stable operation of the device.

[0041] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A multiple-effect evaporator, comprising an evaporation tank, with a connection port and an exhaust port formed on both sides of the evaporation tank, a working tank connected to the connection port is provided on one side of the evaporation tank, and a gas collecting tank connected to the exhaust port is provided on the other side of the evaporation tank, and a liquid storage tank is provided on the side of the working tank close to the gas collecting tank, and wastewater to be treated is stored in the liquid storage tank, characterized in that: The interior of the evaporator is formed with a filter chamber, an evaporation chamber, a vaporization chamber and a collection chamber from top to bottom, the evaporation chamber is connected to the exhaust port, and the vaporization chamber is connected to the connection port; the filter mechanism is connected to the evaporator, including a liquid spray pipe and a leakage plate, the liquid spray pipe is arranged in the filter chamber and is rotatably connected to the upper end of the evaporator, the leakage plate is arranged in the filter chamber, and the leakage plate is rotatably connected to the liquid spray pipe coaxially; The evaporation assembly is connected to the liquid spray pipe, and includes a positioning tube, a guide tube, a liquid level sensor and a plurality of evaporation mechanisms. The liquid level sensor is arranged in the collecting chamber and is fixedly connected to the side wall of the positioning tube. The lower end of the positioning tube passes through the collecting chamber and extends to the outside of the evaporation tank, and the upper end is fixedly connected to the lower end of the liquid spray pipe coaxially. A plurality of jet holes are formed on the upper part of the positioning tube. The plurality of evaporation mechanisms are arranged at equal angles along the circumferential direction of the evaporation tank. Each evaporation mechanism includes a plurality of vaporization tubes. One end of the guide tube is connected to the collecting chamber, and the other end extends downward out of the evaporation tank.

2. The multiple-effect evaporator according to claim 1, characterized in that: The filtering mechanism also includes a motor, a first pulley, a second pulley and a liquid inlet pipe. The liquid spray pipe is formed with a plurality of liquid spray holes at equal angles along the circumferential direction. The liquid inlet pipe is coaxially fixedly connected to the upper end of the evaporator and is rotatably connected to the liquid spray pipe. A flow sensor is fixedly connected to the upper end of the liquid inlet pipe. The flow sensor is used to monitor the flow between the liquid storage tank and the evaporator. The motor is fixedly connected to the side wall of the evaporator through a motor frame, the first pulley is coaxially fixedly connected to the output end of the motor, the second pulley is coaxially fixedly connected to the liquid spray pipe and is connected to the first pulley through a belt transmission.

3. The multiple-effect evaporator according to claim 2, characterized in that: The filtering mechanism also includes a filter screen, a leakage plate and a plurality of turbidity sensors. The filter screen is fixedly arranged at the upper end of the leakage plate and is rotatably connected to the liquid spray pipe coaxially. The plurality of turbidity sensors are arranged in an array at equal angles along the circumferential direction below the filter screen. The plurality of turbidity sensors are respectively fixedly connected to the outer wall of the evaporation tank. The leakage plate is formed with a plurality of strip-shaped perforations at equal angles along the circumferential direction. Two triangular liquid baffle plates are symmetrically fixedly connected in each strip-shaped perforation.

4. The multiple-effect evaporator according to claim 3, characterized in that: The evaporation component also includes an injection tube, two positioning disks, two positioning gears, a plurality of connecting columns and a plurality of temperature sensors. The plurality of temperature sensors are arranged in an array at equal angles along the circumferential direction of the inner wall of the evaporation chamber. The injection tube is arranged in the evaporation chamber and is fixedly connected to the positioning tube coaxially. The injection tube is formed with perforations that are connected to the plurality of injection holes in a one-to-one correspondence. The two positioning disks are symmetrically arranged at the two ends of the injection tube. The upper positioning disk is fixedly connected to the liquid injection tube coaxially, and the lower positioning disk is rotatably connected to the positioning tube coaxially. The plurality of connecting columns are arranged in an array at equal angles along the circumferential direction of the positioning disks. The two ends of the connecting columns are respectively fixedly connected to the two positioning disks. The two positioning gears are respectively arranged on one side of the two positioning disks close to the injection tube, and the two positioning gears are respectively fixedly connected to the injection tube coaxially.

5. The multiple-effect evaporator according to claim 4, characterized in that: The evaporation mechanism also includes a transfer column, two transfer discs and two transfer gear rings. The two transfer discs are rotatably connected to the two positioning discs respectively. The two ends of the transfer column are respectively coaxially fixedly connected to the two transfer discs. A number of vaporization tubes are evenly distributed on the sides of the transfer column. The two ends of the vaporization tubes are respectively coaxially fixedly connected to the two transfer discs. The two transfer gear rings are respectively coaxially fixedly connected to the two transfer discs. The two transfer gear rings are respectively meshed with corresponding positioning gears.

6. The multiple-effect evaporator according to claim 5, characterized in that: The evaporation component also includes a sliding pad, a telescopic tube, a connecting tube, a reset spring and a plurality of pressure sensors. The sliding pad is arranged in the vaporization chamber and at the lower end of the connecting port. The plurality of pressure sensors are arranged in an array at equal angles along the circumferential direction of the upper end of the sliding pad. The telescopic tube is sleeved on the outside of the positioning tube. The upper end of the telescopic tube is fixedly connected to the positioning disk, and the lower end is fixedly connected to the sliding pad. The connecting tube is arranged on the inside of the telescopic tube. The lower end of the connecting tube is fixedly connected to the sliding pad. The reset spring is sleeved on the outside of the positioning tube. The upper end of the reset spring is fixedly connected to the positioning disk.

7. The multiple-effect evaporator according to claim 6, characterized in that: The evaporation component also includes a plurality of scraper sleeves and a plurality of scraper cores. The plurality of scraper sleeves are arranged in an array at equal angles along the circumferential direction of the sliding pad. The upper ends of the plurality of scraper sleeves are fixedly connected to the lower end of the positioning disk. The plurality of scraper cores are elastically connected to the plurality of scraper sleeves respectively. The lower ends of the plurality of scraper cores are respectively abutted against the upper end of the sliding pad. The scraper sleeves and the scraper cores are formed with a plurality of strip-shaped avoidance holes at equal intervals. The plurality of strip-shaped avoidance holes can facilitate the flow of steam in the vaporization chamber.

8. The multiple-effect evaporator according to claim 7, characterized in that: The evaporation component also includes a strip liquid pipe, a transfer pad and a material discharge baffle. The strip liquid pipe is fixedly connected to the sliding pad, the transfer pad is fixedly connected to the middle of the strip liquid pipe, one end of the material discharge baffle is against the transfer pad, and the other end is hinged to the transfer pad through a torsion spring.

9. A method for using a multiple-effect evaporator, implemented by using the multiple-effect evaporator according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: The operator starts the device, and the wastewater to be treated flows from the liquid storage tank into the evaporation tank, and then the wastewater is sprayed into the filter chamber in a circular shape after passing through the rotating liquid spray pipe; S2: The wastewater filtered by the filter chamber enters the evaporation chamber. The positioning pipe introduces heating steam into the evaporation chamber. The heating steam heats the wastewater in the vaporization tubes. The liquid level sensor monitors the liquid level in the collection chamber, controls the rotation speed of the liquid spraying pipe, and drives the vaporization tubes to rotate synchronously. The wastewater forms a spiral liquid film in the rotating vaporization tube, which accelerates the vaporization efficiency and prevents scaling. S3: The steam generated by vaporization will be concentrated in the vaporization chamber and flow into the working tank through the connecting port, while the remaining condensate and dirt will be discharged from the guide pipe after passing through the strip liquid pipe.

10. The method for using the multiple-effect evaporator according to claim 9, characterized in that: In step S2: the rotation speed of the liquid spraying pipe is 5-15 rpm.

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