Multi-effect evaporator and method of using the same

Abstract

The present invention relates to the field of evaporators, and specifically relates to a multi-effect evaporator and its usage method. It includes an evaporation tank, with an exhaust port and a connection port respectively arranged on the side of the tank. The connection port is connected to a working tank, and the exhaust port is connected to a gas collection tank. A liquid storage tank is arranged beside the working tank to store the wastewater to be treated. Inside the evaporation tank, from top to bottom, there are a filtration chamber, an evaporation chamber, a vaporization chamber, and a collection chamber. The filtration mechanism includes a liquid spraying pipe and a leakage plate. The liquid spraying pipe is rotatably connected to the upper end of the tank coaxially, and the leakage plate is fixedly connected to the inner wall of the tank and rotates coaxially with the liquid spraying pipe. The evaporation assembly is connected to the liquid spraying pipe and includes a positioning pipe, a diversion pipe, a liquid level sensor, and several evaporation mechanisms. The upper part of the positioning pipe has air spraying holes. The evaporation mechanisms are distributed in the evaporation chamber, and each evaporation mechanism includes several vaporization pipes. The diversion pipe is connected to the collection chamber and extends outside the tank. The liquid level sensor is placed in the collection chamber to monitor the liquid level and ensure the stable operation of the equipment. This device can avoid uneven evaporation heat, and at the same time, realize the real-time monitoring of each treatment link, improving the safety of the equipment.

Description

Technical Field

[0001] The present invention relates to the field of evaporators, and more particularly to a multi-effect evaporator and its usage method. Background Art

[0002] In existing multi-effect evaporator systems, the first-effect tank serves as the primary evaporator. The hot steam generated after heating the wastewater in it is directly used as the heat source for the second-effect tank. These hot steam enter the interior of the heater in the second-effect tank and transfer heat to the wastewater in the second-effect tank through heat exchange, thereby achieving further evaporation of the wastewater. However, this direct steam injection method has significant problems: the interior of the heater is prone to form fouling due to impurities, salts, or other insoluble substances in the steam. Over time, these fouling will not only reduce the heat conduction efficiency of the heater but also affect the steam condensation efficiency, thus affecting the performance and efficiency of the entire evaporation system.

[0003] The existing methods for removing fouling mainly involve manual, mechanical, or chemical cleaning after parking and disassembly, resulting in production losses. Therefore, some multi-effect evaporators will adopt process condition changes to suppress fouling formation based on reducing heat conduction efficiency, but this process will still increase energy consumption and industrial investment costs, which is not conducive to large-scale production and processing.

[0004] Meanwhile, when the existing evaporators heat the wastewater, the heating steam is mostly introduced from one side of the evaporator. However, during this process, fouling with uneven distribution is more likely to form inside the evaporator. And as the evaporator operates, the wastewater on the side far from the steam inlet end will show incomplete evaporation, resulting in local heat overload in the evaporator, which may further lead to failures in the subsequent evaporator body. In some large evaporation equipment, due to the unreasonable steam inlet method, the temperature in the area near the steam inlet end is too high, which is prone to cause local corrosion of the equipment, while the wastewater treatment in the area far from the inlet end is not thorough, affecting the overall treatment effect. In addition, local heat overload may also pose safety hazards, threatening the lives of production personnel.

[0005] Finally, traditional evaporators lack real-time detection of the operating state. During wastewater treatment, the wastewater flow rate is unstable, resulting in uneven distribution in the evaporator, reducing energy utilization and overall evaporation efficiency. The temperature change inside the evaporator is difficult to detect. Abnormal temperature will accelerate equipment corrosion, affect the wastewater evaporation effect, promote fouling formation and accumulation, and increase energy consumption. The steam pressure cannot be monitored in real time. Too high is prone to cause steam leakage, threatening safety and wasting energy, while too low will affect the evaporation efficiency and production progress. In addition, the operating state cannot be comprehensively evaluated, making it difficult to detect potential fault hazards in a timely manner. Once a fault appears, it will increase the maintenance cost 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:

[0008] 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;

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] Further, the evaporation assembly further includes a jet pipe, two positioning discs, two positioning gears, a plurality of connecting columns, and a plurality of temperature sensors. The plurality of temperature sensors are arranged in an equiangular array along the circumferential direction of the inner wall of the evaporation chamber. The jet pipe is arranged in the evaporation chamber and fixedly connected to the positioning pipe coaxially. The jet pipe is formed with perforations corresponding to and communicating with the plurality of jet holes one by one. The two positioning discs are symmetrically arranged at both ends of the jet pipe. The positioning disc located above is fixedly connected to the liquid spraying pipe coaxially. The positioning disc located below is rotatably connected to the positioning pipe coaxially. The plurality of connecting columns are arranged in an equiangular array along the circumferential direction of the positioning disc. Both ends of the connecting column are fixedly connected to the two positioning discs respectively. The two positioning gears are respectively arranged on one side of the two positioning discs close to the jet pipe. The two positioning gears are respectively fixedly connected to the jet pipe coaxially.

[0015] Further, the evaporation mechanism further includes an adapter column, two adapter discs, and two adapter gear rings. The two adapter discs are respectively rotatably connected to the two positioning discs. Both ends of the adapter column are fixedly connected to the two adapter discs coaxially. The plurality of vaporization pipes are evenly distributed beside the adapter column. Both ends of the plurality of vaporization pipes are fixedly connected to the two adapter discs respectively. The two adapter gear rings are respectively fixedly connected to the two adapter discs coaxially. The two adapter gear rings are respectively meshed with the corresponding positioning gears.

[0016] Further, the evaporation assembly further includes a sliding cushion disc, a telescopic pipe, a connecting pipe, a reset tension spring, and a plurality of pressure sensors. The sliding cushion disc is arranged in the vaporization chamber and located at the lower end of the connection port. The plurality of pressure sensors are arranged in an equiangular array along the circumferential direction of the upper end of the sliding cushion disc. The telescopic pipe is sleeved outside the positioning pipe. The upper end of the telescopic pipe is fixedly connected to the positioning disc, and the lower end is fixedly connected to the sliding cushion disc. The connecting pipe is arranged inside the telescopic pipe. The lower end of the connecting pipe is fixedly connected to the sliding cushion disc. The reset tension spring is sleeved outside the positioning pipe. The upper end of the reset tension spring is fixedly connected to the positioning disc.

[0017] Further, the evaporation assembly further includes a plurality of scraper sleeves and a plurality of scraper cores. The plurality of scraper sleeves are arranged in an equiangular array along the circumferential direction of the sliding cushion disc. The upper ends of the plurality of scraper sleeves are fixedly connected to the lower end of the positioning disc. The plurality of scraper cores are elastically connected to the plurality of scraper sleeves respectively. The lower ends of the plurality of scraper cores respectively abut against the upper end of the sliding cushion disc. A plurality of strip-shaped avoidance holes are formed at equal intervals on the scraper sleeves and the scraper cores. The plurality of strip-shaped avoidance holes can facilitate the flow of steam in the vaporization chamber.

[0018] Further, the evaporation assembly further includes a strip-shaped liquid pipe, a transfer cushion plate, and a blanking baffle. The strip-shaped liquid pipe is fixedly connected to the sliding cushion disc. The transfer cushion plate is fixedly connected to the middle of the strip-shaped liquid pipe. One end of the blanking baffle abuts against the transfer cushion plate, and the other end is hinged to the transfer cushion plate through a torsion spring.

[0019] The usage method of the multi-effect evaporator is realized by using the above multi-effect evaporator, and includes the following steps:

[0020] S1: The operator starts the device, and the wastewater to be treated flows from the liquid storage tank into the evaporation tank. Subsequently, the wastewater passes through the rotating liquid spraying pipe and is sprayed circumferentially into the filtration chamber;

[0021] S2: The wastewater filtered by the filtration chamber enters the evaporation chamber. The positioning pipe introduces heating steam into the evaporation chamber. The heating steam heats the wastewater in a number of vaporization pipes. The liquid level sensor monitors the liquid level in the collection chamber, controls the rotation speed of the liquid spraying pipe, drives a number of vaporization pipes to rotate synchronously. The wastewater forms a spiral liquid film inside the rotating vaporization pipes, accelerating the vaporization efficiency and preventing scale formation;

[0022] S3: The steam generated by vaporization will concentrate in the vaporization chamber and flow through the connection port into the working tank, while the remaining concentrates and dirt will be discharged from the diversion pipe after passing through the strip-shaped liquid pipe.

[0023] In the step S2: The rotation speed of the liquid spraying pipe is 5 - 15 rpm.

[0024] The beneficial effects of the present invention compared with the prior art are:

[0025] First: The device realizes the feeding of heating steam from the middle of the evaporation chamber in the evaporation tank through the positioning pipe, so that the evaporation chamber is heated from the inside out. During this process, a number of vaporization pipes can move along the circumferential direction of the positioning pipe to ensure that the heating steam can uniformly heat the wastewater in the vaporization pipes, reducing the generation of uneven dirt;

[0026] Second: The device realizes the evaporation of wastewater through a number of evaporation mechanisms with a split 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. Subsequently, when the wastewater flows downward through the leakage plate, the triangular liquid baffle can reduce the flow rate of the wastewater, so that when the wastewater falls on the transfer disc and passes through the vaporization pipe, the wastewater can flow down in a film along the pipe wall of the vaporization pipe. At this time, the wastewater can be quickly heated by the heating steam, improving the steam generation efficiency. And when there is too much scale in a certain evaporation mechanism, the operator only needs to replace the corresponding vaporization pipe, thereby improving the work efficiency;

[0027] Third: When the steam generated by the device flows into the working tank through the connection port, the waste liquid remaining after the evaporation of the wastewater will flow downward from the strip-shaped liquid pipe into the collection chamber. And because the scraping plate core will move along the circumferential direction of the sliding cushion disc, the scraping plate core can also scrape off the dirt attached to the sliding cushion disc, and push the waste liquid through the strip-shaped liquid pipe, avoiding the waste liquid and dirt remaining on the sliding cushion disc, thereby affecting the subsequent cleaning work;

[0028] Fourth: 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, which is more conducive to the downward film flow effect on the inner wall of the vaporization tube, improving the evaporation efficiency and stability. The temperature sensor monitors the temperatures of the heating steam and the wastewater, and when abnormal, it timely reminds the operator to adjust the steam flow to avoid local overheating or overcooling, preventing the aggravation of scaling and incomplete evaporation, and ensuring the stable operation of the equipment. The pressure sensor monitors the steam pressure in the vaporization chamber, and when approaching the upper limit, it adjusts the steam inlet volume, and cooperates with structures such as the sliding pad to maintain the pressure stability, ensuring steam generation and equipment safety. Each sensor accurately locates each process, facilitating the operator to timely discover potential fault hazards and avoid safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a three-dimensional structural schematic diagram when the present invention is in use;

[0030] Figure 2 is a three-dimensional structural schematic diagram of the present invention;

[0031] Figure 3 is a partial three-dimensional sectional structural schematic diagram of the present invention;

[0032] Figure 4 is Figure 3 the enlarged view of the structure at A in

[0033] Figure 5 is Figure 3 the enlarged view of the structure at B in

[0034] Figure 6 is a plane half-sectional view of the present invention;

[0035] Figure 7 is a three-dimensional half-sectional view of the present invention;

[0036] Figure 8 is Figure 7 the enlarged view of the structure at C in

[0037] Figure 9 is Figure 7 the enlarged view of the structure at D in

[0038] Figure 10 is Figure 7 the enlarged view of the structure at E in

[0039] The reference numerals in the figure are:

[0040] 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

[0041] 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.

[0042] 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;

[0043] 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 );

[0044] 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.

[0045] The evaporation assembly 19, connected to the liquid spraying pipe 13, includes a positioning pipe 20, a diversion pipe 41, a liquid level sensor 49, and a plurality of evaporation mechanisms 26. The liquid level sensor 49 is arranged in the collection chamber 7 and fixedly connected to the side wall of the positioning pipe 20. The lower end of the positioning pipe 20 passes through the collection chamber 7 and extends out of the evaporation tank 1, and the upper end is coaxially and fixedly connected to the lower end of the liquid spraying pipe 13. A plurality of spray holes 22 are circumferentially arrayed on the same horizontal plane of 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 diversion pipe 41 is communicated with the collection chamber 7, and the other end extends downward out of the evaporation tank 1.

[0046] The device further 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 rate, steam temperature, pressure, and the operating states of various components, to the cloud server in real time. Through the APP on terminal devices such as mobile phones or computers, users can remotely view the operation of the device anytime and anywhere. At the same time, users can also perform remote operations on the device through the APP, such as starting and stopping the motor 9, adjusting the steam flow rate and temperature, etc., to realize the intelligent remote management of the multi-effect evaporator and improve the convenience and timeliness of operation. When the device is operating, when the wastewater enters the interior of the evaporation tank 1 through the liquid spraying pipe 13, the wastewater will be sprayed from the liquid spraying pipe 13 into the filtration chamber 4, and then the wastewater will flow downward through the leakage plate 16. At this time, the flow rate of the wastewater will decrease to ensure that when the wastewater passes through a plurality of evaporation mechanisms 26, the wastewater can flow down in a film on the inner wall of the vaporization pipe 28. During this process, the steam for heating is sprayed into the evaporation chamber 5 from the positioning pipe 20, and a plurality of vaporization pipes 28 located in the evaporation chamber 5 will be heated by the heating steam to facilitate the vaporization of the wastewater inside the vaporization pipe 28. The vapor 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 concentrates and dirt will be discharged from the diversion pipe 41 under the action of the evaporation assembly 19. When processing the concentrates, the liquid level sensor 49 monitors the liquid level height of the concentrates in real time. When the liquid level reaches the set value, the operator will be reminded in time to process the concentrates 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 of the collection chamber 7 and controls the rotation speed of the liquid spraying pipe 13.

[0047] In order to drive the liquid spraying pipe 13 to rotate so as to evenly spray the wastewater into the filtration chamber 4, the following features are specifically set:

[0048] The filtering mechanism 8 further includes a motor 9, a first pulley 10, a second pulley 11 and a liquid inlet pipe 12. A number of liquid spraying holes 14 are formed at equal angles along the circumferential direction of the liquid spraying pipe 13. The liquid inlet pipe 12 is coaxially and fixedly connected to the upper end of the evaporation tank 1 and is rotationally 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 rate 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 bracket. The first pulley 10 is coaxially and fixedly connected to the output end of the motor 9. The second pulley 11 is coaxially and fixedly connected to the liquid spraying pipe 13 and is drivingly connected to the first pulley 10 through a belt. After the motor 9 is started, the motor 9 drives the second pulley 11 to rotate through the first pulley 10. After the second pulley 11 rotates, it drives the liquid spraying pipe 13 to rotate. During the rotation of the liquid spraying pipe 13, the waste water will be evenly sprayed out from a number of liquid spraying holes 14, preparing for the subsequent filtration and evaporation of the waste water.

[0049] The flow sensor 42 installed at the liquid inlet pipe 12 will monitor the waste water flow rate data entering the liquid spraying pipe 13 in real time, ensuring that the waste water flow rate is stably within an appropriate range, and improving the evaporation efficiency and stability.

[0050] In order to filter the impurities in the waste water and further supplement the specific structure of the leakage plate 16, the following features are specifically set:

[0051] The filtering mechanism 8 further includes a filter screen 15, a leakage plate 16 and a number of turbidity sensors 46. The filter screen 15 is fixedly arranged at the upper end of the leakage plate 16 and is rotationally connected to the liquid spraying pipe 13 coaxially. A number of turbidity sensors 46 are arranged in an equal-angle array along the circumferential direction below the filter screen 15. A number of turbidity sensors 46 are respectively fixedly connected to the outer wall of the evaporation tank 1. A number of strip-shaped perforations 17 are formed at equal angles along the circumferential direction of the leakage plate 16. Two triangular liquid retaining plates 18 are symmetrically fixedly connected in each strip-shaped perforation 17. After the waste water is evenly sprayed out from a number of liquid spraying holes 14, the waste water will pass through the filter screen 15 and fall on the leakage plate 16. The filter screen 15 can clean the large particle impurities in the waste water, reducing the dirt generated after the subsequent vaporization of the waste water. When the waste water passes through a number of strip-shaped perforations 17, the triangular liquid retaining plates 18 arranged in the strip-shaped perforations 17 will control the flow rate of the waste water, so that the waste water can flow down in a film shape along the inner wall of a number of vaporization pipes 28. The turbidity sensors 46 are installed below the filter screen 15 in the filtering chamber 4 to monitor the turbidity of the waste water 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 waste water. At this time, the data can be transmitted to the user terminal APP through the wireless communication module, reminding the operator to clean or replace the filter screen 15, ensuring that the impurity content of the waste water entering the evaporation chamber 5 is within a reasonable range, reducing the generation of dirt, and maintaining the stable operation of the equipment.

[0052] In order to supplement the specific structure of the evaporation assembly 19, the following features are specifically set:

[0053] The evaporation assembly 19 further includes a spray gas pipe 21, two positioning discs 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 equiangular array along the circumferential direction of the inner wall of the evaporation chamber 5. The spray gas pipe 21 is arranged in the evaporation chamber 5 and is coaxially and fixedly connected to the positioning pipe 20. The spray gas pipe 21 is formed with through holes corresponding to and communicating with the plurality of spray holes 22 one by one. The two positioning discs 23 are symmetrically arranged at both ends of the spray gas pipe 21. The positioning disc 23 located above is coaxially and fixedly connected to the liquid spray pipe 13, and the positioning disc 23 located below is coaxially and rotatably connected to the positioning pipe 20. The plurality of connecting columns 25 are arranged in an equiangular array along the circumferential direction of the positioning disc 23. Both ends of the connecting column 25 are fixedly connected to the two positioning discs 23 respectively. The two positioning gears 24 are respectively arranged on one side of the two positioning discs 23 close to the spray gas pipe 21, and the two positioning gears 24 are respectively coaxially and fixedly connected to the spray gas pipe 21. The plurality of temperature sensors 47 are used to monitor the real-time temperatures of the heating steam and the wastewater, and accurately grasp the heat exchange situation during the evaporation process. When the temperature is abnormal, the operator can timely adjust the steam flow rate to avoid local overheating or insufficient temperature, ensure the stable evaporation efficiency of the wastewater, and prevent the phenomenon of increased 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 fixedly connected thereto to rotate. Since the two positioning discs 23 are connected by the plurality of connecting columns 25, the two positioning discs 23 will rotate synchronously.

[0054] In order to facilitate the evaporation of the wastewater in the plurality of vaporization pipes 28, the following features are specifically provided:

[0055] The evaporation mechanism 26 further includes a transfer column 29, two transfer discs 27 and two transfer gear rings 30. The two transfer discs 27 are respectively rotatably connected to the two positioning discs 23 (as Figure 4 shown). Both ends of the transfer column 29 are coaxially and fixedly connected to the two transfer discs 27 respectively. The plurality of vaporization pipes 28 are evenly distributed beside the transfer column 29. Both ends of the plurality of vaporization pipes 28 are fixedly connected to the two transfer discs 27 respectively. The two transfer gear rings 30 are respectively coaxially and fixedly connected to the two transfer discs 27, and the two transfer gear rings 30 are respectively engaged 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 and does not move, the positioning gear 24 will drive the transfer disc 27 to rotate through the transfer gear ring 30, and the plurality of vaporization pipes 28 fixedly connected to the transfer disc 27 will rotate along the circumferential direction of the transfer disc 27, so as to facilitate the high-efficiency evaporation of the wastewater. During this process, in order to prevent the torque on the plurality of vaporization pipes 28 from being too large and causing damage when the two transfer discs 27 rotate, the transfer column 29 can improve the synchronization rate of the two transfer discs 27.

[0056] As described above, since the heating steam is ejected from a plurality of air ejection holes 22 in the middle of the positioning disc 23 at this time, the heating steam can uniformly heat the vaporization tube 28 during rotation, reducing the problem of uneven heat in the evaporation chamber 5. And because a plurality of vaporization tubes 28 work independently of each other, even if scale forms inside the vaporization tube 28, it will not affect the normal operation of the other vaporization tubes 28, preventing the operation of the evaporation process from being affected by scale.

[0057] In order to achieve that when the pressure in the vaporization chamber 6 is too high, the volume of the vaporization chamber 6 can change adaptively to prevent the generation of steam in a plurality of vaporization tubes 28 from being affected, the following features are specifically set:

[0058] The evaporation assembly 19 further includes a sliding cushion disc 31, a telescopic tube 32, a connecting tube 33, a reset tension spring 34 and a plurality of pressure sensors 48. The sliding cushion disc 31 is arranged in the vaporization chamber 6 and is located at the lower end of the connection port 3. A plurality of pressure sensors 48 are arranged in an equiangular array along the circumferential direction of the upper end of the sliding cushion disc 31. The telescopic tube 32 is sleeved outside the positioning tube 20. The upper end of the telescopic tube 32 is fixedly connected to the positioning disc 23, and the lower end is fixedly connected to the sliding cushion disc 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 cushion disc 31. The reset tension spring 34 is sleeved outside the positioning tube 20. The upper end of the reset tension spring 34 is fixedly connected to the positioning disc 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 at this time will push the sliding cushion disc 31 downward to prevent the pressure inside the vaporization chamber 6 from being too high. When the sliding cushion disc 31 moves, the sliding cushion disc 31 will drive the reset tension spring 34 to deform through the connecting tube 33, so that the reset tension spring 34 can drive the sliding cushion disc 31 to move upward and reset later. During this process, a plurality of pressure sensors 48 monitor the internal steam pressure in real time. Cooperating with structures such as the sliding cushion disc 31 and the telescopic tube 32, when the pressure approaches the set upper limit, the steam inlet amount is adjusted in time to ensure that the generation of steam in the vaporization tube 28 is not affected, preventing equipment damage or reduced evaporation efficiency due to excessive pressure.

[0059] In order to scrape off the concentrate and dirt deposited on the sliding cushion disc 31, the following features are specifically set:

[0060] The evaporation assembly 19 further includes a plurality of scraper sleeves 35 and a plurality of scraper cores 37. A plurality of scraper sleeves 35 are arranged in an equiangular array along the circumferential direction of the sliding cushion disc 31. The upper ends of a plurality of scraper sleeves 35 are fixedly connected to the lower end of the positioning disc 23. A plurality of scraper cores 37 are elastically connected to a plurality of scraper sleeves 35 respectively. The lower ends of a plurality of scraper cores 37 respectively abut against the upper end of the sliding cushion disc 31 (refer to Figure 3 and Figure 6), a number of strip-shaped avoidance holes 36 are formed at equal intervals on the scraper sleeve 35 and the scraper core 37. The number of strip-shaped avoidance holes 36 facilitates the flow of steam in the vaporization chamber 6. During the rotation of the positioning disc 23, the positioning disc 23 moves through a number of scraper sleeves 35, and a number of scraper sleeves 35 drive a number of scraper cores 37 to move respectively. When the number of scraper cores 37 moves, the concentrate and dirt attached to the upper end of the sliding pad 31 will be scraped off to prevent the concentrate and dirt from remaining on the sliding pad 31.

[0061] 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 specifically set:

[0062] The evaporation assembly 19 further includes a strip-shaped liquid pipe 38, a transfer backing plate 39 and a blanking baffle 40. The strip-shaped liquid pipe 38 is fixedly connected to the sliding pad 31, the transfer backing plate 39 is fixedly connected to the middle of the strip-shaped liquid pipe 38, one end of the blanking baffle 40 abuts against the transfer backing plate 39, and the other end is hinged to the transfer backing plate 39 through a torsion spring (reference Figure 10 ). When the scraper core 37 scrapes off the concentrate and dirt, the concentrate and dirt will fall from the strip-shaped liquid pipe 38 to the upper end of the blanking baffle 40. At this time, the blanking baffle 40 will not tilt under the action of the torsion spring. However, when the concentrate and dirt accumulate more and more, the blanking baffle 40 tilts and releases the concentrate and dirt, so that the concentrate and dirt can pass through the strip-shaped liquid pipe 38 and fall into the collection chamber 7.

[0063] It should be noted that during this process, since the concentrate and dirt will settle at the bottom of the vaporization chamber 6, the concentrate and dirt will move to the strip-shaped liquid pipe 38 prior to the steam, thereby avoiding the leakage of steam from below the strip-shaped liquid pipe 38. At the same time, when the internal pressure of the vaporization chamber 6 increases, the blanking baffle 40 will tilt at a larger angle under the action of the pressure, thereby accelerating the discharge of the concentrate and dirt and quickly adjusting the internal pressure of the vaporization chamber 6.

[0064] The usage method of the multi-effect evaporator includes the following usage steps:

[0065] S1: The operator starts the device, and the wastewater to be treated flows from the liquid storage tank 44 into the evaporation tank 1. Subsequently, the wastewater is sprayed in a circular shape into the filtration chamber 4 after passing through the rotating liquid spraying pipe 13;

[0066] S2: The wastewater filtered by the filtration chamber 4 enters the evaporation chamber 5. The positioning pipe 20 introduces heating steam into the evaporation chamber 5. The heating steam heats the wastewater in a number of vaporization pipes 28. The liquid level sensor 49 monitors the liquid level of the collection chamber 7, controls the rotation speed of the liquid spraying pipe 13, drives a number of vaporization pipes 28 to rotate synchronously, and the wastewater forms a spiral liquid film in the rotating vaporization pipes 28, accelerating the vaporization efficiency and preventing scaling;

[0067] S3: The steam generated by vaporization will concentrate 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 diversion pipe 41 after passing through the strip-shaped liquid pipe 38.

[0068] In the step S2:

[0069] The rotation speed of the liquid spraying pipe 13 is 5 - 15 rpm;

[0070] The steam pressure of the positioning pipe 20 is feedback-controlled by the actual temperature 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.

[0071] This 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 rate, steam temperature, pressure, and the operating status of each component, to the cloud server in real time. Through the APP on terminal devices such as mobile phones or computers, users can remotely view the operation of the device anytime and anywhere. At the same time, users can also perform remote operations on the device through the APP, such as starting and stopping the motor 9, adjusting the steam flow rate and temperature, etc., to achieve intelligent remote management of the multi-effect evaporator and improve the convenience and timeliness of operation.

[0072] When this device is in operation, the wastewater to be treated flows from the liquid storage tank 44 into the liquid spraying pipe 13 through the liquid inlet pipe 12. The flow sensor 42 at the upper end of the liquid inlet pipe 12 accurately monitors the wastewater flow rate data entering the liquid spraying pipe 13 in real time and transmits it to the controller. The controller ensures that the wastewater flow rate is stable within an appropriate range according to the preset optimal flow rate range, thereby more precisely controlling the effect of the wastewater forming a film and flowing downward on the inner wall of the vaporization pipe 28 when passing through the evaporation mechanism 26, and improving the evaporation efficiency and stability.

[0073] The wastewater is sprayed into the filtration chamber 4 from the liquid spraying holes 14 of the liquid spraying 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 to prompt attention to the impurity situation of the wastewater. The wastewater passes through the filter screen 15, and the filter screen 15 intercepts large particle impurities, reducing the risk of subsequent dirt generation. Then, the wastewater passes through the leakage plate 16, and the triangular liquid baffle 18 in its strip-shaped through holes 17 reduces the wastewater flow rate, ensuring that when the wastewater passes through the evaporation mechanism 26, it can form a film and flow downward on the inner wall of the vaporization pipe 28.

[0074] Meanwhile, since the motor 9 starts, the motor 9 drives a number of vaporization tubes 28 to rotate along the direction of the positioning disc 23. At the same time, each vaporization tube 28 connected to the transfer disc 27 also rotates along the circumferential direction of the positioning disc 23. During this process, the steam for heating is sprayed into the evaporation chamber 5 from the positioning tube 20, and a number of vaporization tubes 28 located in the evaporation chamber 5 are heated by the heating steam, so as to vaporize the wastewater inside the vaporization tubes 28. Meanwhile, since the heating steam is sprayed out from a number of air holes 22 at the center of the positioning disc 23, the heating steam can uniformly heat the rotating vaporization tubes 28, avoiding uneven heat in the evaporation chamber 5. And because a number of vaporization tubes 28 work independently, even if a certain vaporization tube 28 is fouled, it will not affect other vaporization tubes 28, ensuring the smooth progress of the evaporation process.

[0075] In the vaporization chamber 6, the pressure sensors 48 arranged at equal angles along the circumferential direction of the upper end of the sliding cushion disc 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 sensors 48 transmit signals to the controller. The controller adjusts the steam inlet volume. At the same time, the steam pushes the sliding cushion disc 31 to move downward. When the sliding cushion disc 31 moves, it drives the connecting pipe 33 to deform the reset tension spring 34, so that the reset tension spring 34 can drive the sliding cushion disc 31 to reset later.

[0076] The vapor generated by vaporization will be concentrated in the vaporization chamber 6 and flow into the working tank 43 through the connection port 3. The remaining concentrates and dirt will be discharged from the diversion pipe 41 after passing through the strip-shaped liquid pipe 38. During this process, the liquid level sensor 49 in the collection chamber 7 monitors the height of the concentrate liquid level in real time and controls the rotation speed of the liquid spraying pipe 13. And 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 can process the concentrate in time to prevent the collection chamber 7 from overflowing and ensure the stable operation of the device.

[0077] The above embodiments only represent one or several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be understood as a limitation to the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended 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 spraying pipe, and includes a positioning pipe, a flow guide pipe, a liquid level sensor and a plurality of evaporation mechanisms. The liquid level sensor is arranged in the collecting chamber and fixedly connected to the side wall of the positioning pipe. The lower end of the positioning pipe passes through the collecting chamber and extends to the outside of the evaporation tank. The upper end is fixedly connected to the lower end of the liquid spraying pipe coaxially. A plurality of jet holes are formed on the upper part of the positioning pipe. 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 pipes. One end of the flow guide pipe is connected to the collecting chamber, and the other end extends downwardly out of the evaporation tank. The filtering mechanism also includes a motor, a first pulley, a second pulley and a liquid inlet pipe. The liquid injection pipe is formed with a plurality of liquid injection 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 injection 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 the 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 injection pipe and is connected to the first pulley through a belt transmission. 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.

2. The multiple-effect evaporator according to claim 1, 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.

3. The multiple-effect evaporator according to claim 2, 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.

4. The multiple-effect evaporator according to claim 3, 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.

5. The multiple-effect evaporator according to claim 4, 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.

6. The multiple-effect evaporator according to claim 5, 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.

7. A method for using a multiple-effect evaporator, implemented by using the multiple-effect evaporator according to any one of claims 1 to 6, 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.

8. The method for using the multiple-effect evaporator according to claim 7, characterized in that: In step S2: the rotation speed of the liquid spraying pipe is 5-15 rpm.

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