Multi-effect evaporation seawater desalination integrated device based on energy recovery

Abstract

The application is suitable for the technical field of marine engineering device, and provides a multi-effect evaporation seawater desalination integrated device based on energy recovery, which comprises a first treatment chamber and a second treatment chamber, further comprises a liquid inlet condensing mechanism and a heating mechanism, the liquid inlet condensing mechanism is used for sucking seawater and guiding the seawater into the heating mechanism, the heating mechanism is used for heating the seawater and guiding the seawater into the first treatment chamber, the liquid inlet condensing mechanism passes through the cavities of the first treatment chamber and the second treatment chamber and is rotatably installed on the first treatment chamber and the second treatment chamber, and the condensing copper pipe group is driven to rotate and reciprocally slide at the same time, so that continuous centrifugal force and mechanical vibration are generated. This effectively destroys the stable adhesion of the condensate film on the pipe wall, prevents the deposition and growth of salt and other dirt on the pipe wall, and realizes online scale prevention. The problem of heat transfer efficiency attenuation caused by stable liquid film and scale of the traditional fixed condensing pipe is effectively solved, frequent shutdown chemical or physical cleaning is avoided, and the maintenance cost and shutdown loss are reduced.

Description

Technical Field

[0001] This invention belongs to the field of marine engineering equipment technology, and particularly relates to a multi-effect evaporation seawater desalination integrated device based on energy recovery. Background Technology

[0002] In the field of marine engineering, especially in independent operating systems such as ocean-going vessels and offshore platforms, a stable supply of fresh water is the lifeline for ensuring personnel living conditions, equipment cooling, and power system resupply. Seawater desalination units based on multi-effect evaporation, which efficiently utilize waste heat from the ship's main engine exhaust or cylinder liner water as a heat source, have become a key component of the ship's comprehensive energy utilization system. By recovering low-grade waste heat to produce fresh water, it significantly reduces the consumption of additional fuel, improves the ship's overall energy efficiency and range, and is an important embodiment of "green ships" and energy-saving and emission-reduction technologies.

[0003] Among these issues, scaling and heat transfer attenuation in condenser heat exchangers are particularly prominent, becoming a major technical bottleneck restricting the long-term stable operation of marine seawater desalination plants. During the condensation process, a stable condensate film forms on the outer wall of traditional fixed condenser copper tubes. This film not only constitutes significant thermal resistance but also becomes an ideal substrate for the adhesion and growth of crystallized salts, rapidly leading to the formation of a hard scale layer.

[0004] This scaling phenomenon poses several serious hazards to ship systems: First, scaling directly leads to a sharp decline in condenser heat transfer efficiency, reducing the water production ratio of the unit, which indirectly increases the load or energy consumption of the main engine. Second, scaling triggers frequent and costly maintenance needs; traditional shutdown chemical cleaning or mechanical cleaning operations are extremely expensive. Third, scaling products may detach and enter the system, clogging subsequent pipelines or valves, causing even greater system failures. To solve these problems, it is essential to design a multi-effect evaporation seawater desalination integrated device based on energy recovery. Summary of the Invention

[0005] This invention provides a multi-effect evaporative seawater desalination integrated device based on energy recovery, which solves the problem that the condensation heat exchange structure of existing marine seawater desalination devices is prone to forming a hard scale layer due to the condensate film, resulting in a significant decrease in heat transfer efficiency.

[0006] This invention is implemented as follows: a multi-effect evaporative seawater desalination integrated device based on energy recovery, comprising a primary treatment chamber and a secondary treatment chamber spaced apart, connected by a diversion component. A concentrated water discharge pipe is connected and fixedly installed at the lower end of the secondary treatment chamber. A pressure-reducing pump is connected and fixedly installed on both the primary and secondary treatment chambers. The device also includes a liquid inlet condensation mechanism and a heating mechanism. The liquid inlet condensation mechanism draws in seawater and guides it into the heating mechanism. The heating mechanism heats the seawater and guides it into the primary treatment chamber. The liquid inlet condensation mechanism passes through the interiors of both the primary and secondary treatment chambers and is rotatably mounted on them. During steam condensation, the liquid inlet condensation mechanism adjusts its contact position with the steam by rotation, simultaneously assisting in the separation of condensed freshwater from the liquid inlet condensation mechanism.

[0007] Both the primary and secondary treatment chambers are fixedly equipped with storage panels, which together with the inner wall of the treatment chamber form storage troughs with openings at the top. A freshwater discharge pipe is fixedly installed on the secondary treatment chamber, extending into both the primary and secondary treatment chambers, with its upper end connected to the two storage troughs respectively.

[0008] Preferably, both the primary processing chamber and the secondary processing chamber are equipped with air pressure detectors.

[0009] Preferably, the diversion assembly includes a diversion pipe located between the primary treatment chamber and the secondary treatment chamber, with both ends of the diversion pipe connected to the primary treatment chamber and the secondary treatment chamber respectively. A first valve is installed on the diversion pipe. A temperature detector is installed on the primary treatment chamber for measuring the seawater temperature inside the primary treatment chamber. A controller is fixedly installed on the primary treatment chamber for receiving temperature signals from the temperature detector and for controlling the operation of the first valve.

[0010] Preferably, the liquid inlet condensation mechanism includes a suction pump fixedly installed outside the secondary treatment chamber, a first pipe rotatably installed on the secondary treatment chamber, the first pipe extending into the secondary treatment chamber and communicating with the discharge pipe of the suction pump, the suction pump pumping seawater into the first pipe, the other end of the first pipe rotatably installed on the primary treatment chamber and extending into the primary treatment chamber, the portion of the first pipe located in the primary and secondary treatment chambers being made of copper tubing.

[0011] The primary processing chamber is equipped with a piping assembly, which is connected to the first pipeline.

[0012] Preferably, the piping assembly includes a second pipe and a third pipe located within the primary processing chamber. The upper end of the third pipe is rotatably mounted within the primary processing chamber. Both the second and third pipes are copper pipes. The second pipe is located between the first and third pipes, with both ends inserted into the first and third pipes respectively. A limit ring is fixedly installed inside the upper end of the first pipe, and the lower end of the second pipe contacts the limit ring. Two symmetrically distributed first protrusions are fixedly installed inside the lower end of the second pipe, and two symmetrically distributed second protrusions are fixedly installed inside the upper end of the second pipe. Both the first and second protrusions have openings. Two first support blocks are fixedly installed inside the upper end of the first pipe, and a first guide rod is fixedly installed on each of the first support blocks. The first guide rod passes through the first protrusion and extends into the second pipe. Two second support blocks are fixedly installed inside the lower end of the third pipe, and a second guide rod is fixedly installed on each of the second support blocks. The second guide rod passes through the second protrusion and extends into the second pipe. The second pipe is slidably mounted on the first and third pipes. A spring is sleeved on the outside of each of the second guide rods, and both ends of the spring are fixedly connected to the second support block and the second protrusion respectively.

[0013] The first, second, and third pipes are all installed at an angle.

[0014] The liquid inlet condensation mechanism also includes a first bevel gear sleeved outside the second pipe. The first bevel gear is fixedly connected to the second pipe. A servo motor is fixedly installed outside the secondary treatment room. A second bevel gear is fixedly installed at the output shaft end of the servo motor. The second bevel gear meshes with the first bevel gear.

[0015] Preferably, the heating mechanism includes a water tank fixedly installed outside the primary treatment room, the water tank having a pressure balancing port, a guide pipe connected and fixedly installed on the water tank, the upper end of the guide pipe being connected to the upper port of a third pipe, multiple equally spaced heating elements fixedly installed on the water tank, the heating elements extending into the water tank, a water outlet pipe connected and fixedly installed at the bottom of the water tank, the lower end of the water outlet pipe being connected to the primary treatment room, and a second valve installed on the water outlet pipe.

[0016] Preferably, a solar panel is fixedly installed on the outside of the primary treatment room, and the solar panel is exposed to the outside and absorbs solar energy to power the heating element.

[0017] Preferably, the lower end of the water tank is provided with an exhaust pipe, both ends of which penetrate the water tank. The portion of the exhaust pipe inside the water tank is meandering and is made of heat-conducting copper pipe. The exhaust pipe is connected to the exhaust gas discharge pipe of the steam turbine or diesel engine.

[0018] Preferably, the outer side of the second pipe has multiple interconnected guide grooves, the guide grooves are divided into axial sections and spiral sections, the axial sections are arranged along the axial direction of the second pipe, the spiral sections are spiral in shape, and a drive rod is fixedly installed inside the primary treatment chamber, the lower end of the drive rod extends into the guide groove and contacts the inner wall of the guide groove.

[0019] Preferably, both the primary processing chamber and the secondary processing chamber are equipped with observation windows.

[0020] Compared with related technologies, the multi-effect evaporation seawater desalination integrated device based on energy recovery provided by the present invention has the following beneficial effects: 1. By simultaneously driving the condenser copper tube assembly to rotate and reciprocate, continuous centrifugal force and mechanical vibration are generated. This effectively disrupts the stable adhesion of the condensate film on the tube wall and prevents the deposition and growth of scale such as salts on the tube wall, achieving online scale prevention. This effectively solves the problem of heat transfer efficiency reduction caused by stable liquid film and scale formation in traditional fixed condenser tubes, avoids frequent shutdowns for chemical or physical cleaning, greatly enhances the system's operational stability and reliability, and reduces maintenance costs and downtime losses; The combined motion of the condenser tubes disrupts the stable thick liquid film formed by the condensation of steam outside the tubes, allowing the condensate to quickly detach from the tube wall, significantly reducing the liquid film thermal resistance, and thus significantly improving the heat transfer efficiency from steam to the tube wall. The movement of the pipe also causes disturbance to the seawater inside the pipe, which disrupts the thermal boundary layer inside the pipe and enhances the heat absorption efficiency on the seawater side. With the aid of motion, the inclined pipes effectively guide condensate to fall along the pipe wall into a dedicated collection tank, reducing the loss of fresh water in the evaporation chamber and improving the recovery rate of the finished fresh water.

[0021] 2. By significantly lowering the boiling point of seawater through vacuuming, evaporation occurs at low temperatures, reducing the initial energy requirement for heating. The "dual-effect evaporation" design requires only one external heating cycle to drive two evaporation processes, allowing for the reuse of input heat energy. The "counter-current heat exchange" design allows the low-temperature raw seawater to flow sequentially through low-temperature and high-temperature condenser tubes, achieving excellent temperature matching with the steam condensation heat release process. This maximizes the recovery of latent heat of condensation for preheating the seawater, improving overall heat recovery efficiency.

[0022] The combined effect of the above-mentioned multi-effect energy-saving measures significantly reduces the energy consumption required to produce a unit volume of fresh water, directly saving operating costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 Cross-sectional view of the present invention Figure 1 ; Figure 3Cross-sectional view of the present invention Figure 2 ; Figure 4 This is an enlarged schematic diagram of some structures at the first, second, and third pipes in this invention. Figure 1 ; Figure 5 This is an enlarged schematic diagram of some structures at the first, second, and third pipes in this invention. Figure 2 ; Figure 6 This is an enlarged cross-sectional view of a portion of the structure of the first, second, and third pipes in this invention; Figure 7 This is an exploded view of the first pipe, the second pipe, and the third pipe in this invention; Figure 8 This is an enlarged cross-sectional view of the second pipe in this invention; Figure 9 This is an enlarged cross-sectional view of a portion of the structure of the water tank in this invention. Figure 1 ; Figure 10 This is an enlarged cross-sectional view of a portion of the structure of the water tank in this invention. Figure 2 ; Figure 11 This is a system block diagram of the controller associated in this invention.

[0024] In the diagram: 1. Primary treatment chamber; 2. Secondary treatment chamber; 3. Concentrate discharge pipe; 4. Pressure reducing pump; 5. Collection plate; 6. Collection tank; 7. Freshwater discharge pipe; 8. Air pressure detector; 9. Diverter pipe; 10. First valve; 11. Temperature detector; 12. Controller; 13. Suction pump; 14. First pipe; 15. Second pipe; 16. Third pipe; 17. Limiting ring; 18. Second protrusion; 19. First support block; 20. First guide rod; 21. Second support block; 22. Second guide rod; 23. Spring; 24. First protrusion; 25. First bevel gear; 26. Servo motor; 27. Second bevel gear; 28. Water tank; 29. ​​Diverter pipe; 30. Heating element; 31. Solar panel; 32. Water outlet pipe; 33. Second valve; 34. Exhaust pipe; 35. Guide groove; 36. Drive rod. Detailed Implementation

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] A preferred embodiment of the multi-effect evaporation seawater desalination integrated device based on energy recovery provided by the present invention is as follows: Figures 1 to 10 As shown: An integrated multi-effect evaporation seawater desalination device based on energy recovery includes a primary treatment chamber 1 and a secondary treatment chamber 2 spaced apart. The primary treatment chamber 1 and the secondary treatment chamber 2 are connected by a diversion component. A concentrated water discharge pipe 3 is connected to and fixedly installed at the lower end of the secondary treatment chamber 2. A pressure-reducing pump 4 is connected to and fixedly installed on both the primary treatment chamber 1 and the secondary treatment chamber 2. The device also includes a liquid inlet condensation mechanism and a heating mechanism. The liquid inlet condensation mechanism is used to draw in seawater and guide the seawater into the heating mechanism. The heating mechanism is used to heat the seawater and guide the seawater into the primary treatment chamber 1. The liquid inlet condensation mechanism passes through the inner cavity of the primary treatment chamber 1 and the secondary treatment chamber 2 and is rotatably installed on the primary treatment chamber 1 and the secondary treatment chamber 2. During the steam condensation process, the liquid inlet condensation mechanism adjusts its contact position with the steam by rotating, and simultaneously assists the condensed fresh water to detach from the liquid inlet condensation mechanism.

[0028] A storage plate 5 is fixedly installed in both the primary treatment chamber 1 and the secondary treatment chamber 2. The storage plate 5 and the inner wall of the treatment chamber form a storage groove 6 with an opening at the top. A fresh water discharge pipe 7 is fixedly installed on the secondary treatment chamber 2. The fresh water discharge pipe 7 extends into the primary treatment chamber 1 and the secondary treatment chamber 2. The upper end of the fresh water discharge pipe 7 is connected to the two storage grooves 6 respectively.

[0029] Both the primary processing chamber 1 and the secondary processing chamber 2 are equipped with air pressure detectors 8.

[0030] The diversion assembly includes a diversion pipe 9 located between the primary treatment chamber 1 and the secondary treatment chamber 2. The two ends of the diversion pipe 9 are connected to the primary treatment chamber 1 and the secondary treatment chamber 2, respectively. A first valve 10 is installed on the diversion pipe 9. A temperature detector 11 is installed on the primary treatment chamber 1. The temperature detector 11 is used to measure the seawater temperature inside the primary treatment chamber 1. A controller 12 is fixedly installed on the primary treatment chamber 1. The controller 12 is used to receive the temperature signal from the temperature detector 11 and to control the operation of the first valve 10.

[0031] The liquid inlet condensation mechanism includes a suction pump 13 fixedly installed outside the secondary treatment chamber 2. A first pipe 14 is rotatably installed on the secondary treatment chamber 2. The first pipe 14 extends into the secondary treatment chamber 2 and is connected to the discharge pipe of the suction pump 13. The suction pump 13 pumps seawater into the first pipe 14. The other end of the first pipe 14 is rotatably installed on the primary treatment chamber 1 and extends into the primary treatment chamber 1. The portion of the first pipe 14 located in the primary treatment chamber 1 and the secondary treatment chamber 2 is made of copper pipe.

[0032] The primary processing chamber 1 is equipped with a piping assembly, which is connected to the first pipe 14.

[0033] The piping assembly includes a second pipe 15 and a third pipe 16 located within the primary processing chamber 1. The upper end of the third pipe 16 is rotatably mounted within the primary processing chamber 1. Both the second pipe 15 and the third pipe 16 are copper pipes. The second pipe 15 is located between the first pipe 14 and the third pipe 16, with both ends of the second pipe 15 inserted into the first pipe 14 and the third pipe 16, respectively. A limit ring 17 is fixedly installed inside the upper end of the first pipe 14, and the lower end of the second pipe 15 contacts the limit ring 17. Two symmetrically distributed first protrusions 24 are fixedly installed inside the lower end of the second pipe 15, and two symmetrically distributed second protrusions 18 are fixedly installed inside the upper end of the second pipe 15. The first protrusions 24 and... The second protrusions 18 are all perforated. Two first support blocks 19 are fixedly installed inside the upper end of the first pipe 14. A first guide rod 20 is fixedly installed on each of the first support blocks 19. The first guide rod 20 passes through the first protrusion 24 and extends into the second pipe 15. Two second support blocks 21 are fixedly installed inside the lower end of the third pipe 16. A second guide rod 22 is fixedly installed on each of the second support blocks 21. The second guide rod 22 passes through the second protrusions 18 and extends into the second pipe 15. The second pipe 15 is slidably installed on the first pipe 14 and the third pipe 16. A spring 23 is sleeved on the outside of each second guide rod 22. The two ends of the spring 23 are fixedly connected to the second support block 21 and the second protrusion 18, respectively.

[0034] The first pipe 14, the second pipe 15, and the third pipe 16 are all installed at an angle.

[0035] The liquid inlet condensation mechanism also includes a first bevel gear 25 sleeved outside the second pipe 15. The first bevel gear 25 is fixedly connected to the second pipe 15. A servo motor 26 is fixedly installed outside the secondary processing chamber 2. A second bevel gear 27 is fixedly installed at the output shaft end of the servo motor 26. The second bevel gear 27 meshes with the first bevel gear 25.

[0036] Multiple guide grooves 35 with connected ends are opened on the outer side of the second pipe 15. The guide grooves 35 are divided into axial sections and spiral sections. The axial sections are arranged along the axial direction of the second pipe 15, and the spiral sections are spiral-shaped. A drive rod 36 is fixedly installed inside the primary processing chamber 1. The lower end of the drive rod 36 extends into the guide groove 35 and contacts the inner wall of the guide groove 35.

[0037] The heating mechanism includes a water tank 28 fixedly installed outside the primary treatment chamber 1. The water tank 28 has a pressure balance port. A guide pipe 29 is connected to and fixedly installed on the water tank 28. The upper end of the guide pipe 29 is connected to the upper port of the third pipe 16. Multiple heating elements 30 are fixedly installed on the water tank 28 at equal intervals. The heating elements 30 extend into the water tank 28. A water outlet pipe 32 is connected to and fixedly installed at the bottom of the water tank 28. The lower end of the water outlet pipe 32 is connected to the primary treatment chamber 1. A second valve 33 is installed on the water outlet pipe 32.

[0038] This device achieves cascaded utilization of thermal energy and improved heat transfer efficiency through a multi-effect design that incorporates dual-effect low-pressure evaporation, countercurrent energy recovery, and dynamic enhanced condensation. While reducing energy consumption in seawater desalination, it also solves the problems of high liquid film thermal resistance and easy scaling associated with traditional condenser tubes. The specific working process is as follows: After the device is started, the pressure-reducing pumps 4 in the two treatment chambers first evacuate the primary treatment chamber 1 and the secondary treatment chamber 2, reducing the pressure in both chambers to a level far below atmospheric pressure. This significantly lowers the boiling point of seawater, achieving low-temperature evaporation and reducing the energy consumption required for heating. The pressure in the primary treatment chamber 1 is slightly higher than that in the secondary treatment chamber 2, forming a pressure gradient that provides conditions for subsequent cross-chamber flow of concentrate and secondary evaporation. The pressure detectors 8 in both treatment chambers monitor the chamber pressure in real time, ensuring the operational stability of the pressure-reducing pumps 4 and maintaining a continuous and stable low-pressure environment.

[0039] The suction pump 13 pumps the original seawater into the copper tube assembly of the liquid inlet condensation mechanism. The seawater flows in a countercurrent manner through the secondary treatment chamber 2 and the primary treatment chamber 1, simultaneously completing its own preheating and condensation of the chamber steam, thus realizing energy recovery and utilization.

[0040] Secondary stage preheating: The original seawater is pumped to the first pipe 14 in the secondary treatment chamber 2 by the suction pump 13. At this time, the steam in the secondary treatment chamber 2 comes into contact with the cooler outer wall of the copper pipe, condenses upon contact with the cooler surface and releases condensation heat. The heat is transferred to the seawater in the pipe through the copper pipe wall, so that the seawater completes the first preheating. At the same time, the fresh water formed by the condensation of steam flows down the pipe wall under the gravity guidance of the inclined pipe and falls into the collection tank 6 of the secondary treatment chamber 2.

[0041] First-stage preheating: After initial preheating, the seawater continues to flow into the second pipe 15 and the third pipe 16 in the first-stage treatment chamber 1. The temperature of the first-stage treatment chamber 1 is even higher, and the evaporated steam inside it condenses again on the outer wall of the copper pipe. The released heat is absorbed by the seawater inside the pipe, so that the seawater completes the second preheating and the temperature gradually rises. The condensed fresh water here also flows into the collection tank 6 of the first-stage treatment chamber 1 through the inclined pipe.

[0042] This counter-current heat exchange design allows the cold fluid (feed seawater) to gradually enter the high-temperature zone from the low-temperature zone, forming a better temperature match with the heat release process of the steam, thus improving the heat recovery efficiency and increasing energy utilization compared to traditional co-current heat exchange.

[0043] The seawater, after being preheated twice, enters the water tank 28 of the heating mechanism through the guide pipe 29. The heating element 30 reheats the preheated seawater, heating it to the boiling point under the pressure of the primary treatment chamber 1. Then, the second valve 33 is opened, and the heated seawater enters the primary treatment chamber 1 through the outlet pipe 32. Under low pressure, it boils and evaporates, generating a large amount of steam, which provides a heat source for the preheating of the feed seawater. The remaining concentrated brine is temporarily stored at the bottom of the primary treatment chamber 1.

[0044] As the temperature inside the primary treatment chamber 1 decreases, the steam content also decreases. When the temperature detector 11 detects that the seawater temperature inside the primary treatment chamber 1 has reached a set threshold, it sends a signal to the controller 12. The controller 12 automatically controls the opening of the first valve 10 of the diversion pipe 9, allowing the concentrated brine from the primary treatment chamber to flow into the secondary treatment chamber 2. Because the pressure in the secondary treatment chamber 2 is lower, the temperature of the concentrated brine is already higher than the boiling point of seawater at that pressure. Therefore, no additional heating is required. The concentrated brine automatically boils and evaporates upon entering the secondary treatment chamber 2, generating steam again to provide a heat source for the primary preheating of the feed seawater. The remaining final concentrated brine is discharged from the device through the concentrated water discharge pipe 3 at the bottom of the secondary treatment chamber.

[0045] With the design of double-effect evaporation, only heating energy needs to be input through heating element 30. The heat released during the condensation process is absorbed by the seawater multiple times. Multiple seawater evaporation processes are driven by low pressure. Compared with single-effect evaporation, energy consumption is effectively reduced, and the cascade utilization of thermal energy is realized.

[0046] Throughout the operation, the servo motor 26 continuously drives the copper tube assembly for liquid inlet condensation to perform a combination of rotation and reciprocating sliding motion, thereby enhancing the condensation process and inhibiting scaling.

[0047] Motion drive mechanism: Servo motor 26 drives first bevel gear 25 to rotate via second bevel gear 27, thereby coordinating the rotation of first pipe 14, second pipe 15, and third pipe 16. The speed should not be too fast to avoid splashing off the condensate adhering to the outside of the pipes. At the same time, the tapered guide groove 35 on the outer wall of second pipe 15 cooperates with fixed drive rod 36: when the spiral section of guide groove 35 passes through drive rod 36, drive rod 36 pushes the second pipe 15 upward against the spiral inclined surface, compressing spring 23; when the axial section of guide groove 35 passes through drive rod 36, the elastic force of spring 23 pushes the second pipe 15 downward to reset, thereby realizing that the copper pipe assembly continuously performs up-and-down reciprocating motion while rotating.

[0048] Meanwhile, during the sliding process, the second pipe 15 maintains coaxiality through the cooperation of the first guide rod 20 and the first protrusion 24 on the first support block 19, and the cooperation of the second guide rod 22 and the second protrusion 18 on the second support block 21, thus preventing the pipe from shifting. The limiting ring 17 at the upper end of the first pipe 14 restricts the lowest sliding position of the second pipe 15, preventing the pipe from falling off and ensuring the stability of the movement.

[0049] Traditional fixed condenser tubes form a stable, thick condensate film on their outer wall, and the thermal resistance of this film significantly reduces heat transfer efficiency. However, the rotation and reciprocating motion of the copper tube assembly, through centrifugal force and vibration, disrupts the stability of the condensate film on the tube wall, preventing the formation of a thick condensate film. This allows the condensate to quickly detach from the tube wall and flow into the collection tank 6. The inclined arrangement of the copper tube assembly also serves as a guide, concentrating the condensate below the assembly and allowing it to fall into the collection tank 6. This effectively reduces the amount of condensate falling into the primary treatment chamber 1 and the secondary treatment chamber 2, improving the condensate collection rate. Furthermore, it effectively reduces the thermal resistance, significantly improving the efficiency of steam condensation and heat transfer.

[0050] The continuous movement of the copper tube assembly generates constant disturbance and vibration on the tube walls, preventing the adhesion and growth of salt scale from the seawater. Even if a small amount of scale forms, it will be dislodged by the moving tubes, achieving online scale prevention and avoiding the frequent shutdowns required for traditional descaling equipment, thus ensuring the long-term stable operation of the system. The movement of the copper tubes also disturbs the seawater inside, disrupting the thermal boundary layer and improving heat transfer efficiency. This allows the seawater to absorb the condensation heat of the steam more quickly, further enhancing energy recovery efficiency.

[0051] The condensed freshwater collected in the two treatment chambers' receiving tanks 6 is discharged through the freshwater discharge pipe 7, which is the desalinated finished freshwater. Throughout the process, the controller 12 adjusts the opening of the first valve 10 in real time based on the signal from the temperature detector 11, controlling the flow rate of the primary concentrate into the secondary process, balancing the evaporation of the two treatment chambers, and ensuring stable pressure and temperature. At the same time, in conjunction with the feedback from the pressure detector 8, it dynamically adjusts the working state of the pressure-reducing pump 4 to keep the primary treatment chamber 1 and the secondary treatment chamber 2 under low pressure, thus maintaining the stable operation of the entire system.

[0052] like Figure 11 The diagram shown is a system block diagram associated with controller 12. This diagram clearly illustrates the signal and workflow of the entire control system: Input detection layer: Temperature detector 11, primary air pressure detector and secondary air pressure detector transmit the real-time temperature and air pressure detection signals of the chamber to controller 12, which serve as the basis for automatic control decision-making.

[0053] Core control layer: Controller 12 serves as the control core of the system. After receiving feedback signals from the sensors, it completes logical operations and decisions, and outputs control commands to various actuators.

[0054] Execution control layer: Controller 12 can synchronously control the working status of the first valve 10, the second valve 33, the first-stage pressure reducing pump, the second-stage pressure reducing pump, the suction pump 13, the servo motor 26, and the heating element 30 to achieve automated and stable operation of the entire desalination device.

[0055] In a further preferred embodiment of the present invention: like Figure 8 and Figure 9 As shown, a solar panel 31 is fixedly installed on the outside of the primary processing chamber 1. The solar panel 31 is exposed to the outside environment and absorbs solar energy to power the heating element 30. The solar panel 31 installed on the outside of the primary processing chamber 1 can absorb solar energy from the external environment and convert light energy into electrical energy to provide power support for the operation of the heating element 30. This design relies on clean energy to achieve heating and power replenishment, which can replace traditional energy supply, significantly reduce the operating energy consumption and carbon emissions of the device, and can achieve complete self-sufficiency in heating under sufficient sunlight.

[0056] An exhaust pipe 34 is located at the lower end of the water tank 28. Both ends of the exhaust pipe 34 penetrate the water tank 28. The portion of the exhaust pipe 34 inside the water tank 28 is meandering and is made of heat-conducting copper. The exhaust pipe 34 is connected to the exhaust gas discharge pipe of the steam turbine or diesel engine. Industrial exhaust gas can flow within the exhaust pipe 34. Because the portion of the exhaust pipe 34 inside the water tank 28 is a meandering heat-conducting copper pipe, the heat exchange area is maximized. The waste heat carried by the exhaust gas can be efficiently transferred to the seawater to be heated in the water tank 28 through the copper pipe wall, heating the seawater and further reducing the heat load required for the heating element 30. This achieves the recovery and utilization of industrial waste heat and further improves the energy efficiency of the entire device.

[0057] Both the primary treatment chamber 1 and the secondary treatment chamber 2 are equipped with observation windows. The observation windows are made of pressure-resistant and transparent material, allowing staff to directly observe the operating status inside the two treatment chambers, including the evaporation of seawater, the movement of the liquid inlet condensate pipes, and the scaling on the pipe walls. Routine inspections and troubleshooting can be completed without disassembling the equipment, improving the ease of operation and maintenance of the unit.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A multi-effect evaporative seawater desalination integrated device based on energy recovery, comprising a primary treatment chamber (1) and a secondary treatment chamber (2) spaced apart, the primary treatment chamber (1) and the secondary treatment chamber (2) being connected by a diversion component, the lower end of the secondary treatment chamber (2) being connected to and fixedly installed with a concentrate discharge pipe (3), and a pressure reducing pump (4) being connected to and fixedly installed on both the primary treatment chamber (1) and the secondary treatment chamber (2), further comprising a liquid inlet condensation mechanism and a heating mechanism, the liquid inlet condensation mechanism being used to draw in seawater and guide the seawater into the heating mechanism, the heating mechanism being used to heat the seawater and guide the seawater into the primary treatment chamber (1), the liquid inlet condensation mechanism passing through the primary treatment chamber (1) and the secondary treatment chamber (2) The liquid inlet condensing mechanism is rotatably installed in the inner cavity of the treatment chamber (2) and on the primary treatment chamber (1) and the secondary treatment chamber (2). During the steam condensation process, the liquid inlet condensing mechanism adjusts its contact position with the steam by rotation, and simultaneously assists the condensed fresh water to detach from the liquid inlet condensing mechanism. A receiving plate (5) is fixedly installed in both the primary treatment chamber (1) and the secondary treatment chamber (2). The receiving plate (5) and the inner wall of the treatment chamber form a receiving groove (6) with an opening at the upper end. A fresh water discharge pipe (7) is fixedly installed on the secondary treatment chamber (2). The fresh water discharge pipe (7) extends into the primary treatment chamber (1) and the secondary treatment chamber (2). The upper end of the fresh water discharge pipe (7) is connected to the two receiving grooves (6) respectively. The feature is that... The liquid inlet condensation mechanism includes a suction pump (13) fixedly installed outside the secondary treatment chamber (2). A first pipe (14) is rotatably installed on the secondary treatment chamber (2). The first pipe (14) extends into the secondary treatment chamber (2) and is connected to the discharge pipe of the suction pump (13). The suction pump (13) pumps seawater into the first pipe (14). The other end of the first pipe (14) is rotatably installed on the primary treatment chamber (1) and extends into the primary treatment chamber (1). The portion of the first pipe (14) located in the primary treatment chamber (1) and the secondary treatment chamber (2) is made of copper tubing. A piping assembly is provided in the primary treatment chamber (1), and the piping assembly is connected to the first pipe (14). The piping assembly includes components located in the primary treatment chamber (1) and the secondary treatment chamber (2). The second pipe (15) and the third pipe (16) are located in the primary processing chamber (1). The upper end of the third pipe (16) is rotatably installed in the primary processing chamber (1). Both the second pipe (15) and the third pipe (16) are copper pipes. The second pipe (15) is located between the first pipe (14) and the third pipe (16). The two ends of the second pipe (15) are inserted into the first pipe (14) and the third pipe (16) respectively. A limit ring (17) is fixedly installed inside the upper end of the first pipe (14). The lower end of the second pipe (15) is in contact with the limit ring (17). Two symmetrically distributed first protrusions (24) are fixedly installed inside the lower end of the second pipe (15). The upper end of the second pipe (15) is... Two symmetrically distributed second protrusions (18) are fixedly installed. Both the first protrusion (24) and the second protrusion (18) have holes. Two first support blocks (19) are fixedly installed inside the upper end of the first pipe (14). A first guide rod (20) is fixedly installed on each of the first support blocks (19). The first guide rod (20) passes through the first protrusion (24) and extends into the second pipe (15). Two second support blocks (21) are fixedly installed at the lower end of the third pipe (16). A second guide rod (22) is fixedly installed on each of the second support blocks (21). The second guide rod (22) passes through the second protrusion (18) and extends into the second pipe (15). The second pipe (15) is slidably installed on the first pipe. On the second guide rod (22) and the third pipe (16), springs (23) are sleeved on the outside of the second guide rod (22). The two ends of the springs (23) are fixedly connected to the second support block (21) and the second protrusion (18) respectively. The first pipe (14), the second pipe (15) and the third pipe (16) are all inclined. The liquid inlet condensation mechanism also includes a first bevel gear (25) sleeved on the outside of the second pipe (15). The first bevel gear (25) is fixedly connected to the second pipe (15). A servo motor (26) is fixedly installed outside the secondary processing chamber (2). A second bevel gear (27) is fixedly installed on the output shaft end of the servo motor (26). The second bevel gear (27) meshes with the first bevel gear (25).The second pipe (15) has multiple guide grooves (35) connected end to end on its outer side. The guide grooves (35) are divided into axial sections and spiral sections. The axial sections are arranged along the axial direction of the second pipe (15), and the spiral sections are spiral-shaped. A drive rod (36) is fixedly installed inside the primary processing chamber (1). The lower end of the drive rod (36) extends into the guide groove (35) and contacts the inner wall of the guide groove (35).

2. The integrated multi-effect evaporation seawater desalination device based on energy recovery as described in claim 1, characterized in that, Both the primary processing chamber (1) and the secondary processing chamber (2) are equipped with air pressure detectors (8).

3. The integrated multi-effect evaporation seawater desalination device based on energy recovery as described in claim 1, characterized in that, The diversion assembly includes a diversion pipe (9) located between the primary treatment chamber (1) and the secondary treatment chamber (2). The two ends of the diversion pipe (9) are connected to the primary treatment chamber (1) and the secondary treatment chamber (2) respectively. A first valve (10) is installed on the diversion pipe (9). A temperature detector (11) is installed on the primary treatment chamber (1). The temperature detector (11) is used to measure the seawater temperature inside the primary treatment chamber (1). A controller (12) is fixedly installed on the primary treatment chamber (1). The controller (12) is used to receive the temperature signal from the temperature detector (11) and to control the operation of the first valve (10).

4. The integrated multi-effect evaporation seawater desalination device based on energy recovery as described in claim 1, characterized in that, The heating mechanism includes a water tank (28) fixedly installed outside the primary treatment chamber (1). The water tank (28) has a pressure balance port. A guide pipe (29) is connected to and fixedly installed on the water tank (28). The upper end of the guide pipe (29) is connected to the upper port of the third pipe (16). Multiple heating elements (30) are fixedly installed on the water tank (28) at equal intervals. The heating elements (30) extend into the water tank (28). A water outlet pipe (32) is connected to and fixedly installed at the bottom of the water tank (28). The lower end of the water outlet pipe (32) is connected to the primary treatment chamber (1). A second valve (33) is installed on the water outlet pipe (32).

5. The integrated multi-effect evaporation seawater desalination device based on energy recovery as described in claim 4, characterized in that, A solar panel (31) is fixedly installed on the outside of the primary processing chamber (1). The solar panel (31) is exposed to the outside and absorbs solar energy to power the heating element (30).

6. The integrated multi-effect evaporation seawater desalination device based on energy recovery as described in claim 4, characterized in that, The lower end of the water tank (28) is provided with an exhaust pipe (34), both ends of which penetrate the water tank (28). The part of the exhaust pipe (34) inside the water tank (28) is meandering and is a heat-conducting copper pipe. The exhaust pipe (34) is connected to the exhaust gas discharge pipe of the steam turbine or diesel engine.

7. The integrated multi-effect evaporation seawater desalination device based on energy recovery as described in claim 1, characterized in that, Both the primary processing chamber (1) and the secondary processing chamber (2) are equipped with observation windows.

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