Multi-stage distilled water evaporation device
By designing columns and layered support platforms, the evaporator is arranged vertically and the steam and concentrate pipelines are optimized, solving the problems of large footprint and low thermal energy utilization in traditional multi-stage evaporation devices. This achieves a compact and integrated design, improving the efficiency and economy of distilled water production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 南通海发智能科技有限公司
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-28
AI Technical Summary
Traditional multi-stage evaporation distillation water units are too long due to their horizontal series layout, resulting in a large footprint, low space utilization, increased plant construction costs, and low thermal energy utilization efficiency, making it difficult to meet the needs of large-scale continuous production.
The design employs columns and a layered support platform to vertically arrange the evaporator. Through optimized layout of preheater, condenser, pure steam and concentrate pipelines, compact integration is achieved, reducing floor space and heat loss, and improving the efficient transfer of steam and concentrate.
It significantly reduces the footprint and overall length, improves space utilization, lowers factory construction costs, simplifies layout and maintenance, enhances the efficiency and economy of distilled water production systems, and possesses good scalability and flexibility.
Smart Images
Figure CN224172500U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of distillation equipment technology, and in particular to a multi-stage evaporation distillation water apparatus. Background Technology
[0002] Distilled water, a key raw material in pharmaceuticals, bioengineering, and electronics, must meet stringent standards such as sterility, pyrogen-free properties, and low conductivity (e.g., the requirements for water for injection in the Chinese Pharmacopoeia). Traditional single-effect distillation technology achieves purification through a single evaporation-condensation cycle, but it suffers from drawbacks such as low thermodynamic efficiency, high energy consumption, and insufficient water stability. Especially in large-scale continuous production scenarios, it is difficult to balance water quality compliance with operational economics. With the increasing industry demand for ultrapure water and the advancement of "dual carbon" goals, developing efficient, energy-saving, and highly controllable distilled water preparation technologies has become a core requirement for industrial upgrading.
[0003] In related technologies, traditional multi-stage evaporation distillation water devices adopt a horizontal series effect layout. Each effect evaporator, steam pipeline and auxiliary equipment (preheater, condenser, etc.) needs to be arranged linearly along the axial direction, which significantly increases the overall length of the equipment. It lacks a compact integrated design. The excessively long layout results in a large footprint and low space utilization, which greatly increases the plant construction cost. Therefore, it needs to be improved. Utility Model Content
[0004] To address the issue of large footprint in traditional multi-stage evaporation devices, this application provides a multi-stage evaporation distillation water device.
[0005] The multi-stage evaporation and distillation water apparatus provided in this application adopts the following technical solution:
[0006] A multi-stage evaporation and distillation water apparatus includes a frame and a preheater mounted on top of the frame. The frame contains columns, and a layered support platform is fixed vertically on each column. A first-effect evaporator, a second-effect evaporator, a third-effect evaporator, a fourth-effect evaporator, and a fifth-effect evaporator are arranged sequentially from top to bottom on the layered support platform. A water inlet pipe is provided between the preheater and the first-effect evaporator. A heat source mechanism for heating is provided on the first-effect evaporator. Pure steam pipes and concentrated liquid pipes are provided between the first-effect evaporator and the second-effect evaporator, the second-effect evaporator and the third-effect evaporator, the third-effect evaporator and the fourth-effect evaporator, and the fourth-effect evaporator and the fifth-effect evaporator. A condenser is connected to the steam outlet of the fifth-effect evaporator, and a concentrated liquid discharge port is provided at the bottom of the fifth-effect evaporator.
[0007] Traditional multi-stage evaporation distillation water units use a horizontal series-connected effect layout, requiring each evaporator, steam pipeline, and auxiliary equipment (preheater, condenser, etc.) to be arranged linearly along the axial direction. This results in a significant increase in the overall length of the equipment, a lack of compact integrated design, and an excessively long layout that leads to a large footprint, low space utilization, and a substantial increase in plant construction costs. By adopting the above-mentioned technical solution, including a frame, the preheater and condenser are installed on the frame, the columns are welded and fixed inside the frame, and a layered support platform is installed on the column. The first-effect evaporator, second-effect evaporator, third-effect evaporator, fourth-effect evaporator, and fifth-effect evaporator are installed on the layered support platform from top to bottom.
[0008] During distillation, the raw water first enters the preheater for preheating to increase its temperature and reduce the heat energy consumption required for subsequent evaporation. The preheated raw water then enters the first-effect evaporator through the inlet pipe. A heat source (such as industrial steam) enters the shell side (or tube side, depending on the evaporator design) of the first-effect evaporator through the heat source pipe, heating the raw water in the first-effect evaporator to evaporate and generate steam. The generated steam flows to the second-effect evaporator through the pure steam pipe. At the same time, the remaining concentrate in the first-effect evaporator flows to the second-effect evaporator through the concentrate pipe. The steam from the first-effect evaporator sequentially enters the second, third, and fourth-effect evaporators. Each evaporator uses the steam generated in the previous effect as a heat source to continue evaporating the raw water or the concentrate from the previous effect, generating new steam and a more concentrated concentrate. The concentrate is discharged from the concentrate outlet at the bottom of the fifth-effect evaporator. The steam flowing out of the fifth-effect evaporator enters the condenser, where it is condensed into liquid water, i.e., distilled water, by a cooling medium (such as cooling water). The distilled water is discharged from the bottom of the condenser as the product of the unit.
[0009] The use of columns and layered support platforms facilitates a compact, integrated design, significantly reducing the floor space and overall length, improving space utilization, lowering plant construction costs, simplifying the layout, shortening pipelines, and reducing maintenance difficulty and costs. Simultaneously, the vertical arrangement and tight connection of each evaporator stage ensures efficient steam and concentrate transfer. Combined with a preheater, this further optimizes heat utilization, reducing heat loss and subsequent evaporation energy consumption. Furthermore, it provides excellent scalability and flexibility, allowing for easy adjustment of the number of evaporators to meet different production needs. It is also easily integrated with other process equipment, comprehensively improving the efficiency and economy of the distilled water production system.
[0010] Optionally, the inlet pipe is provided with an inlet flow regulating valve and a flow meter in sequence along the water flow direction. The inlet flow regulating valve is used to control the flow rate, and the flow meter is used to observe the flow rate.
[0011] By adopting the above technical solution, the inlet flow regulating valve and flow meter are installed on the inlet pipeline along the water flow direction. Through the setting of the inlet flow regulating valve and flow meter, precise control and real-time monitoring of the inlet water volume are realized. The inlet flow regulating valve can flexibly adjust the inlet water flow according to production needs to ensure stable system operation, while the flow meter can intuitively display the current flow, making it easy for operators to grasp the inlet water status in a timely manner. The synergistic effect of the two improves the automation level and control accuracy of distilled water production, and effectively avoids production fluctuations or equipment failures caused by abnormal flow.
[0012] Optionally, the inlet pipe is also equipped with a flow stabilizer, which has a conical cylindrical structure. The inlet end of the flow stabilizer is connected to the outlet of the inlet flow regulating valve, and the outlet end of the flow stabilizer is connected to the inlet of the flow meter.
[0013] By adopting the above technical solution, the flow stabilizer is installed on the inlet pipe, located between the inlet flow regulating valve and the flow meter. The flow stabilizer effectively improves the stability of the inlet flow. Its special conical cylinder design makes the water flow evenly dispersed, eliminates turbulence and pressure fluctuations, ensures the accuracy of the flow meter measurement and the regulation effect of the inlet flow regulating valve, and avoids equipment vibration or measurement errors caused by unstable water flow.
[0014] Optionally, the heat source mechanism includes a heat source pipeline and an industrial steam furnace, with one end of the heat source pipeline connected to a first-effect evaporator and the other end of the heat source pipeline connected to the industrial steam furnace.
[0015] By adopting the above technical solution, the heat source mechanism includes heat source pipelines and an industrial steam furnace. Through the setting of the heat source mechanism, a stable and efficient heat energy supply is achieved. The industrial steam furnace, as the core of the heat source, can accurately control steam parameters (such as temperature and pressure), while the heat source pipelines ensure that steam is directly and losslessly delivered to the shell side of the evaporator to provide the heat required for evaporation.
[0016] Optionally, the heat source pipeline is equipped with a pressure gauge for monitoring the pressure of the heat source pipeline and an overpressure relief valve for releasing pressure. The opening pressure of the overpressure relief valve is set to 1.1 times the shell-side design pressure.
[0017] By adopting the above technical solution, pressure gauges and overpressure relief valves are installed on the heat source pipeline. Through the installation of pressure gauges and overpressure relief valves, pressure gauges can monitor pipeline pressure fluctuations in real time, ensuring that operators can promptly grasp the heat source operating conditions and make adjustments. The overpressure relief valves automatically release overpressure steam through preset safety thresholds, avoiding pipeline rupture or equipment damage caused by abnormal pressure, and effectively preventing the risk of overpressure in the heat source system.
[0018] Optionally, each of the pure steam pipelines is equipped with a steam regulating valve, which is used to regulate the steam flow rate.
[0019] By adopting the above technical solution, the steam regulating valve is installed on the pure steam pipeline; through the setting of the steam regulating valve, the steam flow between each stage of evaporator is precisely controlled, and the steam regulating valve can adjust the steam delivery volume in real time according to process requirements.
[0020] Optionally, any of the concentrated liquid pipelines is led out from the bottom of the upper evaporator and arranged towards the top of the lower evaporator. The two ends of the concentrated liquid pipeline are respectively connected to the water outlet at the bottom of the upper evaporator and the water inlet at the top of the lower evaporator, and the water outlet and the water inlet are respectively located on both sides of the corresponding evaporator.
[0021] By adopting the above technical solution, the concentrated liquid pipelines are all led out from the bottom of the upper evaporator and arranged towards the top of the lower evaporator, with the outlet and inlet located on the two sides of the corresponding evaporator, respectively. Through the arrangement of the concentrated liquid pipelines, gravity-fed transport of the concentrated liquid between each stage of evaporator and efficient process connection are realized. The energy consumption of transport is eliminated by utilizing the natural drop of the liquid. At the same time, the staggered interface design on both sides of the evaporator avoids spatial interference between the pipeline and the internal structure of the evaporator. This layout simplifies the circulation path of the concentrated liquid and reduces the complexity of the equipment.
[0022] Optionally, the bottom of the layered support platform is provided with a number of stiffening plates to enhance the structural strength, and the number of stiffening plates are arranged sequentially along the height direction of the layered support platform.
[0023] By adopting the above technical solution, stiffening plates are welded and fixed to the bottom of the layered support platform. The stiffening plates enhance the structural strength and deformation resistance of the support platform, effectively disperse the concentrated load of each stage of evaporator, and avoid platform deformation or vibration caused by long-term load, thus providing a reliable structural guarantee for the long-term safe operation of the equipment.
[0024] In summary, this application includes at least one of the following beneficial technical effects:
[0025] 1. The use of columns and layered support platforms facilitates a compact and integrated design, significantly reducing the floor space and overall length, improving space utilization, lowering plant construction costs, simplifying the layout, shortening pipelines, and reducing maintenance difficulty and costs. At the same time, the vertical arrangement and tight connection of each stage of evaporators ensure efficient transfer of steam and concentrate. Combined with the preheater, this further optimizes heat utilization, reduces heat loss and subsequent evaporation energy consumption. In addition, it provides good scalability and flexibility for the unit, allowing for easy adjustment of the number of evaporators to meet different production needs. It is also easy to integrate with other process equipment, comprehensively improving the efficiency and economy of the distilled water production system.
[0026] 2. By setting up the inlet water flow regulating valve and the flow meter, precise control and real-time monitoring of the inlet water flow are achieved. The inlet water flow regulating valve can flexibly adjust the inlet water flow according to production needs to ensure stable system operation, while the flow meter can intuitively display the current flow, making it easy for operators to keep track of the inlet water status. The synergistic effect of the two improves the automation level and control accuracy of distilled water production, and effectively avoids production fluctuations or equipment failures caused by abnormal flow.
[0027] 3. By arranging the concentrated liquid pipeline, gravity-fed transport of the concentrated liquid between each stage of evaporator and efficient process connection are achieved. The energy consumption of transport is eliminated by utilizing the natural drop of the liquid. At the same time, the staggered interface design on both sides of the evaporator avoids spatial interference between the pipeline and the internal structure of the evaporator. This layout simplifies the circulation path of the concentrated liquid and reduces the complexity of the equipment. Attached Figure Description
[0028] Figure 1 This is a front view of a multi-stage evaporation and distillation water apparatus according to an embodiment of this application.
[0029] Figure 2 This is a schematic diagram illustrating the structure of the heat source mechanism in the embodiments of this application.
[0030] Figure 3 This is a schematic diagram illustrating the structure of the water inlet pipe in the embodiments of this application.
[0031] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Preheater; 3. Column; 4. Layered support platform; 5. First-effect evaporator; 6. Second-effect evaporator; 7. Third-effect evaporator; 8. Fourth-effect evaporator; 9. Fifth-effect evaporator; 10. Water inlet pipe; 11. Heat source mechanism; 111. Heat source pipe; 112. Industrial steam furnace; 12. Pure steam pipe; 13. Concentrate pipe; 14. Condenser; 15. Concentrate discharge port; 16. Water inlet regulating valve; 17. Flow meter; 18. Flow distributor; 19. Pressure gauge; 20. Overpressure relief valve; 21. Steam regulating valve; 22. Rib plate. Detailed Implementation
[0032] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0033] This application discloses a multi-stage evaporation and distillation water apparatus. (Refer to...) Figure 1 The multi-stage evaporation distillation water device includes a frame 1. In this embodiment, the frame 1 is made of several square steel welded together. A preheater 2 and a condenser 14 are installed on the top of the frame 1. The internal structure of the preheater 2 and the condenser 14 is existing technology. The preheater 2 is used to preheat the raw water, and the condenser 14 is used to condense the steam into liquid water, i.e., distilled water.
[0034] Reference Figure 1 The frame 1 has columns 3 welded and fixed inside. A layered support platform 4 is welded and fixed on the columns 3 along the vertical direction. In this embodiment, there are multiple columns 3. The layered support platform 4 is arranged from top to bottom with a first-effect evaporator 5, a second-effect evaporator 6, a third-effect evaporator 7, a fourth-effect evaporator 8, and a fifth-effect evaporator 9. The internal structure of the first-effect evaporator 5, the second-effect evaporator 6, the third-effect evaporator 7, the fourth-effect evaporator 8, and the fifth-effect evaporator 9 is the same.
[0035] Reference Figure 1 and Figure 3 Several stiffening plates 22 are welded and fixed to the bottom of the layered support platform 4. The stiffening plates 22 are arranged sequentially along the height direction of the layered support platform 4. This is used to enhance the structural strength and deformation resistance of the support platform, effectively disperse the concentrated load of each stage of the evaporator, avoid platform deformation or vibration caused by long-term load, and provide a reliable structural guarantee for the long-term safe operation of the equipment.
[0036] Reference Figure 1 and Figure 2 The single-effect evaporator 5 is equipped with a heat source mechanism 11. In this embodiment, the heat source mechanism 11 is used to provide industrial steam. The heat source mechanism 11 includes a heat source pipeline 111 and an industrial steam furnace 112. One end of the heat source pipeline 111 is connected to the single-effect evaporator 5, and the other end of the heat source pipeline 111 is connected to the industrial steam furnace 112. The heat source mechanism 11 achieves a stable and efficient supply of heat energy. The industrial steam furnace 112, as the core of the heat source, can accurately control the steam parameters (such as temperature and pressure). The heat source pipeline 111 ensures that the steam is directly and losslessly delivered to the shell side of the evaporator to provide the heat required for evaporation.
[0037] Reference Figure 1 and Figure 2 A pressure gauge 19 and an overpressure relief valve 20 are installed on the heat source pipeline 111. In this embodiment, the opening pressure of the overpressure relief valve 20 is set to 1.1 times the shell-side design pressure. The pressure gauge 19 can monitor pipeline pressure fluctuations in real time, ensuring that operators can promptly grasp the heat source operating conditions and make adjustments. The overpressure relief valve 20 automatically releases overpressure steam through a preset safety threshold, avoiding pipeline rupture or equipment damage caused by abnormal pressure, and effectively preventing the risk of overpressure in the heat source system.
[0038] Reference Figure 1 and Figure 3A water inlet pipe 10 connects the preheater 2 and the first-effect evaporator 5. A water inlet regulating valve 16 and a flow meter 17 are installed sequentially along the water flow direction on the water inlet pipe 10. The water inlet regulating valve 16 is used to control the flow rate, and the flow meter 17 is used to observe the flow rate. This achieves precise control and real-time monitoring of the water inlet. The water inlet regulating valve 16 can flexibly adjust the water inlet flow rate according to production needs to ensure stable system operation, while the flow meter 17 can intuitively display the current flow rate, making it easy for operators to keep track of the water inlet status. The synergistic effect of the two improves the automation level and control accuracy of distilled water production, and effectively avoids production fluctuations or equipment failures caused by abnormal flow rates.
[0039] Reference Figure 1 and Figure 3 Meanwhile, a flow stabilizer 18 is also installed on the water inlet pipe 10. The flow stabilizer 18 has a conical cylindrical structure. The inlet end of the flow stabilizer 18 is connected to the outlet of the water inlet regulating valve 16, and the outlet end of the flow stabilizer 18 is connected to the inlet of the flow meter 17. This effectively improves the stability of the water inlet flow. Through its special conical cylindrical design, the water flow is evenly dispersed, turbulence and pressure fluctuations are eliminated, ensuring the accuracy of the flow meter 17 measurement and the regulation effect of the water inlet regulating valve 16. At the same time, it avoids equipment vibration or measurement errors caused by unstable water flow.
[0040] Reference Figure 1 and Figure 3 Pure steam pipes 12 and concentrated liquid pipes 13 are installed between the first-effect evaporator 5 and the second-effect evaporator 6, the second-effect evaporator 6 and the third-effect evaporator 7, the third-effect evaporator 7 and the fourth-effect evaporator 8, and the fourth-effect evaporator 8 and the fifth-effect evaporator 9. The inlet end of the pure steam pipe 12 is connected to the upper evaporator, and the outlet end of the pure steam pipe 12 is connected to the interior of the lower evaporator. Each evaporator 5 uses the steam generated by the previous effect as a heat source to continue evaporating the raw material water or the concentrated liquid from the previous effect, producing new steam and a more concentrated liquid.
[0041] Reference Figure 1 and Figure 3 Each pure steam pipeline 12 is equipped with a steam regulating valve 21, which is used to regulate the steam flow rate; it realizes the precise control of the steam flow rate between each stage of evaporator, and the steam regulating valve 21 can adjust the steam delivery volume in real time according to process requirements.
[0042] Reference Figure 1 and Figure 3Meanwhile, the steam outlet of the five-effect evaporator 9 is connected to the interior of the condenser 14 through a pipe, and any concentrated liquid pipe 13 is led out from the bottom of the upper evaporator and arranged towards the top of the lower evaporator. The two ends of the concentrated liquid pipe 13 are respectively connected to the water outlet at the bottom of the upper evaporator and the water inlet at the top of the lower evaporator, and the water outlet and water inlet are located on both sides of the corresponding evaporator. The bottom of the five-effect evaporator 9 is provided with a concentrated liquid discharge port 15. This realizes the gravity-driven transport of concentrated liquid between each stage of evaporator and efficient process connection. The energy consumption of transport is eliminated by utilizing the natural drop of liquid. At the same time, the staggered interface design on both sides of the evaporator avoids spatial interference between the pipe and the internal structure of the evaporator. This layout simplifies the concentrated liquid circulation path and reduces the complexity of the equipment.
[0043] The implementation principle of a multi-stage evaporation distillation water device according to an embodiment of this application is as follows: During distillation, the raw water is first preheated by entering the preheater 2 to increase its temperature and reduce the heat energy consumption required for subsequent evaporation. The preheated raw water enters the first-effect evaporator 5 through the inlet pipe 10. The heat source mechanism 11 (such as industrial steam) enters the shell side (or tube side, depending on the evaporator design) of the first-effect evaporator 5 through the heat source pipe 111 to heat the raw water in the first-effect evaporator 5, causing it to evaporate and generate steam. The generated steam flows to the second-effect evaporator 6 through the pure steam pipe 12. At the same time, the remaining steam in the first-effect evaporator 5... The concentrate flows through the concentrate pipeline 13 to the second-effect evaporator 6. Steam enters the second-effect, third-effect, and fourth-effect evaporators sequentially from the first-effect evaporator 5. Each evaporator 5 uses the steam generated in the previous effect as a heat source to continue evaporating the raw material water or the concentrate from the previous effect, producing new steam and a more concentrated concentrate. The concentrate is discharged from the concentrate discharge port 15 at the bottom of the fifth-effect evaporator 9. The steam flowing out of the fifth-effect evaporator 9 enters the condenser 14. In the condenser 14, the steam is condensed into liquid water, i.e., distilled water, by the cooling medium (such as cooling water). The distilled water is discharged from the bottom of the condenser 14 as the product of the device.
[0044] The use of columns 3 and layered support platforms 4 facilitates a compact and integrated design, significantly reducing the floor space and overall length, improving space utilization, lowering plant construction costs, simplifying the layout, shortening pipelines, and reducing maintenance difficulty and costs. At the same time, the vertical arrangement and tight connection of each stage of evaporators ensure efficient transfer of steam and concentrate. Combined with the preheater 2, this further optimizes heat energy utilization, reduces heat loss and subsequent evaporation energy consumption. In addition, it provides good scalability and flexibility for the unit, allowing for easy adjustment of the number of evaporators to meet different production needs. It is also easy to integrate with other process equipment, comprehensively improving the efficiency and economy of the distilled water production system.
[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A multi-stage evaporation and distillation water apparatus, characterized in that: The device includes a frame and a preheater mounted on top of the frame. Inside the frame are columns, and vertically fixed to the columns are layered support platforms. From top to bottom, a first-effect evaporator, a second-effect evaporator, a third-effect evaporator, a fourth-effect evaporator, and a fifth-effect evaporator are arranged on the layered support platforms. A water inlet pipe is provided between the preheater and the first-effect evaporator. A heat source mechanism for heating is provided on the first-effect evaporator. Pure steam pipes and concentrated liquid pipes are provided between the first-effect evaporator and the second-effect evaporator, the second-effect evaporator and the third-effect evaporator, the third-effect evaporator and the fourth-effect evaporator, and the fourth-effect evaporator and the fifth-effect evaporator. The steam outlet of the fifth-effect evaporator is connected to a condenser, and a concentrated liquid discharge port is provided at the bottom of the fifth-effect evaporator.
2. The multi-stage evaporation and distillation water apparatus according to claim 1, characterized in that: The inlet pipe is equipped with an inlet flow regulating valve and a flow meter in sequence along the water flow direction. The inlet flow regulating valve is used to control the flow rate, and the flow meter is used to observe the flow rate.
3. The multi-stage evaporation and distillation water apparatus according to claim 2, characterized in that: The inlet pipe is also equipped with a flow stabilizer, which has a conical cylindrical structure. The inlet end of the flow stabilizer is connected to the outlet of the inlet flow regulating valve, and the outlet end of the flow stabilizer is connected to the inlet of the flow meter.
4. The multi-stage evaporation and distillation water apparatus according to claim 1, characterized in that: The heat source mechanism includes a heat source pipeline and an industrial steam furnace. One end of the heat source pipeline is connected to a first-effect evaporator, and the other end of the heat source pipeline is connected to the industrial steam furnace.
5. The multi-stage evaporation and distillation water apparatus according to claim 4, characterized in that: The heat source pipeline is equipped with a pressure gauge for monitoring the pressure of the heat source pipeline and an overpressure relief valve for releasing pressure. The opening pressure of the overpressure relief valve is set to 1.1 times the shell-side design pressure.
6. The multi-stage evaporation and distillation water apparatus according to claim 1, characterized in that: Each of the pure steam pipelines is equipped with a steam regulating valve, which is used to regulate the steam flow rate.
7. The multi-stage evaporation and distillation water apparatus according to claim 6, characterized in that: Each of the aforementioned concentrate pipelines is led out from the bottom of the upper evaporator and arranged towards the top of the lower evaporator. The two ends of the concentrate pipeline are respectively connected to the water outlet at the bottom of the upper evaporator and the water inlet at the top of the lower evaporator, and the water outlet and the water inlet are respectively located on both sides of the corresponding evaporator.
8. The multi-stage evaporation and distillation water apparatus according to claim 1, characterized in that: The bottom of the layered support platform is provided with several stiffening plates to enhance the structural strength, and the stiffening plates are arranged sequentially along the height direction of the layered support platform.