A seawater desalination energy recovery device and recovery method

Abstract

The application belongs to the technical field of seawater desalination, and particularly relates to a seawater desalination energy recovery device and a recovery method. The device comprises a solar heat collector and a condenser. The condenser is internally provided with a gas delivery pipe and a water delivery pipe. The gas delivery pipe is located outside the water delivery pipe and is in a wrapped state. One end of the gas delivery pipe is in communication with a gas outlet of the solar heat collector. The bottom of the gas delivery pipe is in communication with a group of water collecting pipes. The water delivery pipe is provided with an inlet head and an outlet head at two ends respectively. The seawater in the solar heat collector is heated and evaporated by a vacuum heat collecting pipe, water vapor formed is introduced into the gas delivery pipe of the condenser through the gas outlet, and then flows along the inside of the gas delivery pipe. The original seawater is introduced into the water delivery pipe through the inlet head and flows along the inside of the water delivery pipe. The water vapor and the seawater flow reversely along the inside of the simulated intestinal tract type pipeline and are separated from each other. The two continuously exchange heat through the side wall of the water delivery pipe, so that the condensation, heating and energy recovery efficiency are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of seawater desalination, and particularly relates to a seawater desalination energy recovery device and a recovery method. BACKGROUND

[0002] Solar seawater desalination is a technology that uses solar energy as a source of energy to remove salt and impurities from seawater through physical or chemical methods, thereby obtaining fresh water that can be drunk or used for agriculture and industry. This technology usually uses photothermal conversion or photoelectric conversion to heat seawater to evaporate or drive a reverse osmosis process using solar energy. Solar seawater desalination has the advantages of being green, environmentally friendly, and sustainable, and is particularly suitable for energy-poor and water-shortage areas. Compared with traditional energy-intensive seawater desalination methods, solar seawater desalination can significantly reduce energy consumption and operating costs, and is one of the potential solutions to the global water shortage problem.

[0003] A patent of Chinese patent application CN102320676B discloses a solar seawater desalination unit, and the technical solution points are as follows: the unit comprises a heat pipe type solar collector, a fan, a photovoltaic cell panel, a rotary regenerative adsorption device, a transmission pipeline, a condenser, and a water storage tank; the rotary regenerative adsorption device comprises a long cylindrical regenerator and an adsorber, both of which are semicircular in cross section and are separated by a heat insulation plate; one end of the adsorber is connected to the outlet of the fan, and the other end faces the condenser; one end of the regenerator is closed, and the other end is connected to one end of the transmission pipeline; the other end of the transmission pipeline is connected to the inlet of the condenser; the outlet of the condenser is connected to the water storage tank; and the fan is electrically connected to the photovoltaic cell panel.

[0004] However, the above-mentioned technology has the following defects: after the seawater is heated and vaporized by solar energy, the generated water vapor is usually directly introduced into the condenser to form fresh water, and a large amount of residual heat in the water vapor is not recovered and utilized; some technologies use water vapor to exchange heat with raw seawater to realize the dual functions of condensing the water vapor and preheating the seawater, but the heat exchange efficiency is too low, making it difficult to fully recover the heat in the water vapor, and energy is still wasted.

[0005] Therefore, the application provides a seawater desalination energy recovery device and a recovery method. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background art.

[0007] The technical solution adopted by the application to solve the technical problem is that the seawater desalination energy recovery device comprises a solar collector and a condenser.

[0008] The solar energy collector uses the vacuum heat collecting tube to heat and evaporate the seawater; the condenser is used for condensing and collecting the water vapor generated by the solar energy collector;

[0009] The condenser is internally provided with a gas delivery pipe and a water delivery pipe; both the gas delivery pipe and the water delivery pipe are designed in the shape of simulated intestinal tract; the gas delivery pipe is located outside the water delivery pipe and is in a wrapped shape;

[0010] One end of the gas delivery pipe is communicated with the gas outlet of the solar energy collector; the bottom of the gas delivery pipe is communicated with a group of water collecting pipes; both ends of the water delivery pipe are respectively provided with a water inlet head and a water outlet head; the water outlet head is communicated with the water inlet of the solar energy collector through a conduit.

[0011] Preferably, both ends of the water delivery pipe are rotatably connected with a swivel ring; a group of inclined blades are uniformly distributed on the surface of the swivel ring; both the swivel ring and the blades are located inside the annular cavity formed between the gas delivery pipe and the water delivery pipe.

[0012] Preferably, a group of copper sheets are uniformly distributed between the inner side of the gas delivery pipe and the outer side of the water delivery pipe; a group of drainage grooves are uniformly distributed on the surface of the copper sheets; the drainage grooves of adjacent copper sheets are staggered with each other.

[0013] Preferably, the gas delivery pipe is slidingly fitted inside the condenser; a support ring is fixedly connected inside the gas outlet; the end of the gas delivery pipe is in a plugging shape and is slidingly and sealingly fitted inside the gas outlet; a spring one is fixedly connected between the support ring and the gas delivery pipe; a group of through holes are uniformly distributed on the end of the gas delivery pipe; an annular groove is formed in the inner side of the gas outlet.

[0014] Preferably, a group of fixed plates are fixedly connected inside the condenser between the gas delivery pipes; a group of connecting ropes are uniformly distributed on both sides of the fixed plates; the connecting ropes extend into the water delivery pipe and are fixedly connected with elastic pads; the connecting ropes penetrate through the side walls of the gas delivery pipe and the water delivery pipe and are slidingly and sealingly fitted therewith; an elastic member is fixedly connected between the elastic pad and the water delivery pipe.

[0015] Preferably, a closed space is formed between the elastic pad and the side wall of the water delivery pipe; a group of guide holes are uniformly distributed on the surface of the elastic pad.

[0016] Preferably, a mounting seat is fixedly connected inside the water collecting pipe; a flow guide groove is formed in the middle of the mounting seat; a baffle is hingedly connected to the lower side of the mounting seat through a rotating pin; a spring two is fixedly connected between the baffle and the mounting seat.

[0017] Preferably, an annular recess one and an annular recess two are respectively formed at the corresponding positions of the bottom of the mounting seat and the upper side of the baffle; the recess one and the recess two are both filled with water absorbing materials.

[0018] A method for recovering energy from seawater desalination, the method employing the seawater desalination energy recovery device described above, comprising the following steps:

[0019] A1, the seawater inside the solar collector is heated and evaporated by the vacuum heat collector tube, the vapor pressure inside the gas outlet gradually increases, and the end of the gas conveying pipe slides inside the gas outlet, until the vapor can enter the inside of the gas conveying pipe through the annular groove and the through hole;

[0020] A2, the original seawater enters the water conveying pipe through the water inlet head and flows inside, the vapor and the seawater flow reversely inside the simulated intestinal tract type pipeline and are separated from each other, and the two exchange heat through the side wall of the water conveying pipe, so as to realize water vapor condensation and preheat the original seawater;

[0021] A3, the water vapor drives the blade and the rotating ring to rotate, the blade applies a tangential force to the airflow, so that the vapor forms a spiral motion path around the water conveying pipe inside the gas conveying pipe, and heat transfer to the seawater is promoted;

[0022] A4, as the condensed water gathers to the bottom of the gas conveying pipe, the condensed water gravity applied to the upper side of the baffle gradually increases, the baffle is deflected downward, and the water in the gas conveying pipe is discharged downward through the flow guide groove and collected;

[0023] A5, after the condensed water on the upper side of the baffle gradually decreases, the spring two pulls the baffle to deflect upward and reset, and the flow guide groove is resealed;

[0024] A6, a circle of water seal is formed by the water absorption of the water absorption materials in the recessed groove one and the recessed groove two, the gap between the baffle and the mounting seat is sealed, so as to prevent the water vapor from leaking outward through the flow guide groove.

[0025] The beneficial effects of the present application are as follows:

[0026] 1. The seawater desalination energy recovery device and recovery method, the seawater inside the solar collector is heated and evaporated by the vacuum heat collector tube, the water vapor formed is introduced into the gas conveying pipe inside the condenser through the gas outlet, and then flows inside the gas conveying pipe, at the same time, the original seawater enters the water conveying pipe through the water inlet head and flows inside, the heat of the vapor is conducted to the seawater, so as to recover and utilize the waste heat of the water vapor, realize water vapor condensation and preheat the original seawater, improve the heating efficiency of the subsequent solar collector to the seawater, and the vapor and the seawater flow reversely inside the simulated intestinal tract type pipeline and are separated from each other, the two continuously exchange heat through the side wall of the water conveying pipe, so as to fully transfer heat from the vapor to the seawater, and improve the condensation, heating and energy recovery efficiency.

[0027] 2.The seawater desalination energy recovery device and recovery method, by setting a plurality of copper sheets, the heat of the steam can be transmitted to the seawater through the copper sheets and the water delivery pipe, the heat exchange area between the steam and the seawater is increased, and a labyrinth structure is formed between the copper sheets, the airflow can only stagger through the drainage grooves of the copper sheets, the impact, contact and heat exchange of the steam on the copper sheets are promoted, the flow path of the airflow is prolonged, and the seawater fully absorbs the steam waste heat.

[0028] 3.The seawater desalination energy recovery device and recovery method, when the seawater in the solar heat collector is gradually heated and evaporated to a certain extent, the steam pressure in the gas outlet gradually increases, the end of the gas delivery pipe slides in the gas outlet, the spring is deformed and elongated, until the end surface of the gas delivery pipe is aligned with the annular groove, and the through hole and the annular groove are in communication with each other, at this time the steam in the gas outlet can enter the inside of the gas delivery pipe through the annular groove and the through hole and be relieved, then the gas pressure is insufficient to maintain the deformation of the spring, then the spring pulls the end of the gas delivery pipe to slide and reset, when the gas pressure in the gas outlet increases again, the above-mentioned action is continuously repeated, so that the gas delivery pipe and the water delivery pipe reciprocate laterally in the condenser, the water droplets on the surface of the copper sheet are shaken and shaken, and the condensate water flows down along the drainage groove, on the one hand, the collection efficiency of fresh water is improved, on the other hand, the contact probability between the water droplets on the surface of the copper sheet and the steam is increased, the water droplets continue to provide attachment area for water vapor, and the heat exchange effect is not affected when the copper sheet is covered by a large area of water droplets. BRIEF DESCRIPTION OF DRAWINGS

[0029] The application will be further described below with reference to the drawings.

[0030] Figure 1 is a structural schematic view of the solar heat collector and the condenser in the application;

[0031] Figure 2 is a structural schematic view of the condenser in the application;

[0032] Figure 3 is Figure 2 is a partial enlarged view of A in the application;

[0033] Figure 4 is a structural schematic view of the gas delivery pipe in the application;

[0034] Figure 5 is a structural schematic view of the copper sheet in the application;

[0035] Figure 6 is a sectional view of the condenser in the application;

[0036] Figure 7 is Figure 6 is a partial enlarged view of B in the application;

[0037] Figure 8 is Figure 6 is a local enlarged view at C in figure

[0038] Figure 9 is a schematic diagram of the method flow of the present application.

[0039] In the figure: solar heat collector 1, condenser 2, gas delivery pipe 3, water delivery pipe 4, gas outlet 5, water collection pipe 6, water inlet head 7, water outlet head 8, guide pipe 9, swivel ring 10, blade 11, copper sheet 12, drainage groove 13, support ring 14, spring 15, through hole 16, annular groove 17, fixing plate 18, connecting rope 19, elastic pad 20, elastic member 21, guide hole 22, mounting seat 23, flow guide groove 24, baffle 25, spring 26, recessed groove 27, recessed groove 28. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0041] As shown in Figures 1 to 8 , the seawater desalination energy recovery device of the present application comprises a solar heat collector 1 and a condenser 2.

[0042] The solar heat collector 1 uses vacuum heat collecting tubes to heat and evaporate the seawater therein; the condenser 2 is used to condense and collect the water vapor generated by the solar heat collector 1.

[0043] The condenser 2 is internally provided with a gas delivery pipe 3 and a water delivery pipe 4; both the gas delivery pipe 3 and the water delivery pipe 4 are designed in the shape of simulated intestinal tract; the gas delivery pipe 3 is located outside the water delivery pipe 4 and is in a wrapped state with respect to the water delivery pipe 4; the water delivery pipe 4 is made of easy heat-conducting materials such as copper, aluminum, graphite, etc.

[0044] One end of the gas delivery pipe 3 is in communication with the gas outlet 5 of the solar heat collector 1; the bottom of the gas delivery pipe 3 is in communication with a group of water collection pipes 6; the water delivery pipe 4 is provided with a water inlet head 7 and a water outlet head 8 at both ends, respectively, and both the water inlet head 7 and the water outlet head 8 penetrate the side wall of the gas delivery pipe 3; the water outlet head 8 is in communication with the water inlet of the solar heat collector 1 through a guide pipe 9.

[0045] The seawater desalination device in the prior art uses solar energy to heat and vaporize seawater, and the generated water vapor is usually directly introduced into the condenser 2 to form fresh water. A large amount of residual heat in the water vapor is not recovered and utilized. Some technologies use water vapor to exchange heat with original seawater to realize the dual functions of steam condensation and preheating of seawater. However, the heat exchange efficiency is too low, which makes it difficult to fully recover the heat in the water vapor, and energy is still wasted.

[0046] The application heats and evaporates the seawater inside the solar energy collector 1 through the vacuum heat collecting pipe, the water vapor formed enters the inside of the gas conveying pipe 3 of the condenser 2 through the gas outlet 5, accurately speaking, enters the annular cavity between the gas conveying pipe 3 and the water conveying pipe 4, and then flows along the inside of the gas conveying pipe 3, at the same time, the original seawater enters the water conveying pipe 4 through the water inlet head 7 and flows along the inside of the water conveying pipe 4, the heat of the water vapor is conducted to the seawater, so that the waste heat of the water vapor is recycled and utilized, the water vapor is condensed and the original seawater is preheated, the heating efficiency of the subsequent solar energy collector 1 on the seawater is improved, and the water vapor and the seawater flow reversely along the inside of the simulated intestinal tract type pipeline and are separated from each other, the heat exchange between the two is continuously carried out through the side wall of the water conveying pipe 4, the heat can be fully transferred from the water vapor to the seawater, the condensation, heating and energy recycling efficiency are improved, the condensed fresh water is discharged downwardly through the water collecting pipe 6 at the bottom and is collected, and the heated seawater enters the inside of the solar energy collector 1 through the water outlet head 8 of the water conveying pipe 4 and the conduit 9 to supplement the water of the solar energy collector 1.

[0047] As another embodiment of the application, the water conveying pipe 4 is rotationally connected with the rotating ring 10 at both ends; a group of inclined blades 11 are uniformly distributed on the surface of the rotating ring 10; the rotating ring 10 and the blades 11 are located inside the annular cavity formed between the gas conveying pipe 3 and the water conveying pipe 4.

[0048] When the water vapor enters the inside of the gas conveying pipe 3, the blades 11 and the rotating ring 10 can be rotated by using the airflow, and the rotating blades 11 can exert tangential force on the airflow, so that the water vapor forms a spiral motion form in the gas conveying pipe 3, the heat at different positions in the fluid can be transmitted to the seawater through the water conveying pipe 4, the condensation efficiency of the water vapor is improved, and the heating effect on the seawater is enhanced.

[0049] As another embodiment of the application, a group of copper sheets 12 are uniformly distributed between the inside of the gas conveying pipe 3 and the outside of the water conveying pipe 4; a group of drainage grooves 13 are uniformly distributed on the surface of the copper sheet 12; the drainage grooves 13 of adjacent copper sheets 12 are staggered with each other.

[0050] By arranging a plurality of copper sheets 12, the heat of the water vapor can be transmitted to the seawater through the copper sheets 12 and the water conveying pipe 4, the heat exchange area between the water vapor and the seawater is increased, the copper sheet 12 and the copper sheet 12 form a labyrinth structure, the airflow can only flow through the staggered drainage grooves 13 of the copper sheets 12, the impact, contact and heat exchange between the water vapor and the copper sheets 12 are promoted, the flow path of the airflow is lengthened, and the seawater can fully absorb the waste heat of the water vapor.

[0051] As another embodiment of the present application, the gas pipe 3 is slidingly fitted in the condenser 2; the gas outlet 5 is internally fixedly connected with a support ring 14; the end of the gas pipe 3 is in a blocking shape and is slidingly and sealingly fitted in the gas outlet 5; the support ring 14 is fixedly connected with the spring 15 between the gas pipe 3; the end of the gas pipe 3 is uniformly distributed with a group of through holes 16; the gas outlet 5 is internally provided with an annular groove 17; the water inlet head 7 and the water outlet head 8 of the water pipe 4 are elastically connected when connected with the pipeline.

[0052] Normally, the end surface of the gas pipe 3 is in a misaligned state with the annular groove 17, so that the gas in the gas outlet 5 cannot enter the inside of the gas pipe 3; when the seawater in the solar heat collector 1 is gradually heated and evaporated to a certain degree, the vapor pressure in the gas outlet 5 gradually increases, pushing the end of the gas pipe 3 to slide in the gas outlet 5, the spring 15 is deformed and elongated, until the end surface of the gas pipe 3 is aligned with the annular groove 17, and the through holes 16 and the annular groove 17 are in communication with each other, at this time, the vapor in the gas outlet 5 can enter the inside of the gas pipe 3 through the annular groove 17 and the through holes 16 and be discharged, and then the gas pressure is insufficient to maintain the deformation of the spring 15, so the spring 15 pulls the end of the gas pipe 3 to slide and reset, when the gas pressure in the gas outlet 5 increases again, the above-mentioned action is continuously repeated, so as to realize the lateral reciprocating motion of the gas pipe 3 and the water pipe 4 in the condenser 2, since a large amount of water droplets are attached to the surface of the copper sheet 12 during the condensation process, the reciprocating motion of the gas pipe 3 and the water pipe 4 can shake and shake the water droplets on the surface of the copper sheet 12, promoting the condensate to flow downward along the drainage groove 13, on the one hand, improving the collection efficiency of fresh water, on the other hand, after the water droplets on the surface of the copper sheet 12 are removed, the contact probability between the copper sheet 12 and the vapor increases, continues to provide an attachment area for the water vapor, preventing the copper sheet 12 from being covered by a large area of water droplets and affecting the heat exchange effect.

[0053] As another embodiment of the present application, the condenser 2 is fixedly connected with a group of fixed plates 18 between the gas pipes 3; the fixed plates 18 are uniformly distributed with a group of connecting ropes 19 on both sides; the connecting ropes 19 extend to the inside of the water pipe 4 and are fixedly connected with the elastic pads 20; the connecting ropes 19 penetrate through the side walls of the gas pipe 3 and the water pipe 4 and are slidingly and sealingly fitted; the elastic pads 20 are fixedly connected with the elastic members 21 between the water pipe 4.

[0054] When the gas conveying pipe 3 moves left and right relative to the water conveying pipe 4, when the gas conveying pipe 3 moves away from the fixed plate 18, the connecting rope 19 is taut, and the elastic pad 20 is deformed by the connecting rope 19, so that the bending degree of the elastic pad 20 is increased and the elastic pad 20 moves towards the axis of the water conveying pipe 4, when the gas conveying pipe 3 moves close to the fixed plate 18, the connecting rope 19 is loosened, and the elastic member 21 drives the elastic pad 20 to contract and recover, the above structure can promote the elastic pads 20 in the water conveying pipe 4 to continuously urge and contract, so as to disturb the seawater in the pipe, improve the turbulent effect of the seawater, promote the uniform distribution of seawater of different temperatures, and enhance the heating effect on the seawater.

[0055] The elastic pad 20 and the side wall of the water conveying pipe 4 form a closed space, and a plurality of guide holes 22 are uniformly distributed on the surface of the elastic pad 20.

[0056] When the elastic pad 20 urges towards the middle of the water conveying pipe 4, negative pressure is generated in the closed space, and seawater is sucked into the closed space through the guide holes 22, and when the elastic pad 20 contracts towards the side wall of the water conveying pipe 4, the seawater in the closed space is squeezed out through the guide holes 22, and the water flow is dispersed and laterally impacts the flowing seawater, promotes the seawater to laterally contact the inner wall of the water conveying pipe 4 and exchange heat with the steam, further strengthens the turbulent and mixing effect of the water flow, and improves the heat exchange rate.

[0057] As another embodiment of the present application, the water collecting pipe 6 is fixedly connected with a mounting seat 23, a guide groove 24 is formed in the middle of the mounting seat 23, a baffle 25 is hingedly connected to the lower side of the mounting seat 23 through a rotating pin, and a spring 26 is fixedly connected between the baffle 25 and the mounting seat 23.

[0058] Under normal circumstances, the baffle 25 is pulled tight by the spring 26 and adheres to the lower side of the mounting seat 23 to close the guide groove 24 and reduce the steam in the gas conveying pipe 3 from being guided downward through the water collecting pipe 6, and as the condensed water gradually accumulates at the bottom of the gas conveying pipe 3, the gravity of the condensed water on the upper side of the baffle 25 gradually increases, so that the force of the spring 26 is overcome, the baffle 25 is deflected downward by a certain angle, and then a gap is formed between the free end of the baffle 25 and the mounting seat 23, so that the water at the bottom of the gas conveying pipe 3 can be discharged downward through the guide groove 24 and the gap for collection, and because water passes through the gap during this process, an isolation effect is formed, so that water vapor cannot leak downward through the gap, and when the condensed water on the upper side of the baffle 25 gradually decreases, the gravity of the condensed water cannot support the downward deflection of the baffle 25, so that the spring 26 pulls the baffle 25 upward to reset and close the guide groove 24 again, and waits for the condensed water to continue to accumulate in the gas conveying pipe 3.

[0059] The mounting base 23 and the upper side of the baffle 25 are respectively provided with annular recessed groove 1 27 and recessed groove 28 at corresponding positions; the recessed groove 1 27 and recessed groove 28 are filled with water-absorbing material, such as sponge, cotton cloth, etc.

[0060] When the baffle 25 deflects downward, some of the condensed water will enter the recessed groove 28 and be absorbed by its absorbent material as it flows along the surface of the baffle 25. Therefore, when the baffle 25 deflects upward and resets, the absorbent material inside the recessed groove 27 will come into contact with the absorbent material inside the recessed groove 28 and absorb water from it. The water-absorbing material and the water in it will form a water seal, thereby sealing the gap between the baffle 25 and the mounting base 23. This will further improve the sealing effect of the baffle 25 on the guide groove 24 and prevent water vapor from leaking out through the water collection pipe 6.

[0061] like Figure 9 As shown, the present invention provides a seawater desalination energy recovery method, which uses the aforementioned seawater desalination energy recovery device and includes the following steps:

[0062] A1. The seawater inside the solar collector 1 is heated and evaporated by the vacuum collector tube. The steam pressure inside the outlet 5 gradually increases, pushing the end of the gas pipe 3 to slide inside the outlet 5 until the steam can enter the gas pipe 3 through the annular groove 17 and the through hole 16.

[0063] A2. The raw seawater enters the water supply pipe 4 through the water inlet head 7 and flows along its interior. The steam and seawater flow in opposite directions and separate from each other along the simulated intestinal pipe. The two exchange heat through the side wall of the water supply pipe 4 to achieve water vapor condensation and preheat the raw seawater.

[0064] A3. Water vapor drives the blades 11 and the rotating ring 10 to rotate. The blades 11 apply tangential force to the airflow, causing the steam to form a spiral motion path around the water pipe 4 inside the gas pipe 3, promoting the transfer of heat to the seawater.

[0065] A4. As the condensate gathers at the bottom of the gas pipe 3, the gravity of the condensate applied to the upper side of the baffle 25 gradually increases, causing the baffle 25 to deflect downwards, and the water inside the gas pipe 3 is discharged downwards and collected through the guide groove 24.

[0066] A5. After the condensate on the upper side of the baffle 25 gradually decreases, the second spring 26 pulls the baffle 25 upward to deflect and reset, and re-closes the guide groove 24.

[0067] A6. A water seal is formed by the water-absorbing material in the first recess 27 and the second recess 28 to seal the gap between the baffle 25 and the mounting base 23, so as to prevent water vapor from leaking out through the guide groove 24.

[0068] The above-mentioned front, back, left, right, up, down are all based on the drawings in the specification Figure 1 as the standard, the side of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on.

[0069] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0070] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A seawater desalination energy recovery device, comprising a solar heat collector (1) and a condenser (2); The solar heat collector (1) uses vacuum heat collecting tube to heat and evaporate seawater therein; the condenser (2) is used for condensing and collecting water vapor generated by the solar heat collector (1); characterized in that The condenser (2) is internally provided with a gas delivery pipe (3) and a water delivery pipe (4); the gas delivery pipe (3) and the water delivery pipe (4) are both designed in the shape of simulated intestinal tract; the gas delivery pipe (3) is located outside the water delivery pipe (4) and is in a wrapped shape to the water delivery pipe (4); One end of the gas delivery pipe (3) is communicated with a gas outlet (5) of the solar heat collector (1); the bottom of the gas delivery pipe (3) is communicated with a group of water collecting pipes (6); the water delivery pipe (4) is respectively provided with a water inlet head (7) and a water outlet head (8) at both ends; the water outlet head (8) is communicated with a water inlet of the solar heat collector (1) through a conduit (9); Both ends of the water delivery pipe (4) are rotatably connected with a rotating ring (10); the surface of the rotating ring (10) is uniformly provided with a group of inclined blades (11); the rotating ring (10) and the blades (11) are both located inside a ring-shaped cavity formed between the gas delivery pipe (3) and the water delivery pipe (4); A group of copper sheets (12) are uniformly arranged between the inner side of the gas delivery pipe (3) and the outer side of the water delivery pipe (4); the surface of the copper sheet (12) is uniformly provided with a group of drainage grooves (13); the drainage grooves (13) of adjacent copper sheets (12) are staggered with each other; The gas delivery pipe (3) is slidingly fitted inside the condenser (2); the gas outlet (5) is fixedly connected with a support ring (14) inside; the end of the gas delivery pipe (3) is in a plugging shape and is slidingly and sealingly fitted inside the gas outlet (5); a spring one (15) is fixedly connected between the support ring (14) and the gas delivery pipe (3); a group of through holes (16) are uniformly arranged at the end of the gas delivery pipe (3); a ring-shaped groove (17) is formed in the inner side of the gas outlet (5); A group of fixed plates (18) are fixedly connected between the gas delivery pipe (3) inside the condenser (2); a group of connecting ropes (19) are uniformly arranged on both sides of the fixed plate (18); the connecting ropes (19) extend into the water delivery pipe (4) and are fixedly connected with elastic pads (20); the connecting ropes (19) penetrate through the side walls of the gas delivery pipe (3) and the water delivery pipe (4) and are slidingly and sealingly fitted therewith; an elastic member (21) is fixedly connected between the elastic pad (20) and the water delivery pipe (4); The elastic pad (20) and the side wall of the water delivery pipe (4) form a closed space; a group of guide holes (22) are uniformly arranged on the surface of the elastic pad (20); An installation seat (23) is fixedly connected inside the water collecting pipe (6); a flow guide groove (24) is formed in the middle of the installation seat (23); a baffle (25) is hingedly connected to the lower side of the installation seat (23) through a rotating pin; a spring two (26) is fixedly connected between the baffle (25) and the installation seat (23).

2. A device for recovering energy from a seawater desalination plant according to claim 1, characterized in that: The bottom of the mounting seat (23) and the upper side of the baffle (25) are respectively provided with annular recess groove one (27) and recess groove two (28) at the corresponding positions; the recess groove one (27) and the recess groove two (28) are filled with water absorption materials.

3. A method for recovering energy in seawater desalination, the method using the seawater desalination energy recovery device according to claim 2, characterized by: The method comprises the following steps: A1, the seawater inside the solar collector (1) is heated and evaporated by the vacuum heat collecting tube, the vapor pressure inside the gas outlet (5) gradually increases, the end of the gas conveying pipe (3) slides inside the gas outlet (5), until the vapor can enter the inside of the gas conveying pipe (3) through the annular groove (17) and the through hole (16); A2, the original seawater enters the water conveying pipe (4) through the water inlet head (7) and flows inside, the vapor and the seawater flow reversely and are separated from each other inside the simulated intestine type pipeline, the two exchange heat through the side wall of the water conveying pipe (4), the water vapor is condensed and the original seawater is preheated; A3, the water vapor drives the blade (11) and the rotating ring (10) to rotate, the blade (11) applies a tangential force to the airflow, so that the vapor forms a spiral motion path around the water conveying pipe (4) inside the gas conveying pipe (3), and heat transfer to the seawater is promoted.

4. A method of energy recovery for seawater desalination according to claim 3, characterized in that: The method further comprises the following steps: A4, as the condensed water gathers to the bottom of the gas conveying pipe (3), the gravity of the condensed water applied to the upper side of the baffle (25) gradually increases, the baffle (25) is deflected downward, and the water inside the gas conveying pipe (3) is discharged downward and collected through the flow guide groove (24); A5, after the condensed water on the upper side of the baffle (25) gradually decreases, the spring two (26) pulls the baffle (25) to be deflected upward and reset, and the flow guide groove (24) is resealed; A6, a circle of water seal is formed by the water absorption effect of the water absorption materials in the recess groove one (27) and the recess groove two (28), the gap between the baffle (25) and the mounting seat (23) is sealed, so as to prevent the water vapor from leaking outward through the flow guide groove (24).

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