A seawater desalination device using waste heat from NGCC power plants

Abstract

The invention relates to the field of waste heat utilization of power plants, and discloses a seawater desalination device utilizing waste heat of NGCC power plants, comprising a heat pump, wherein a heat collecting component is arranged at one end of the heat pump and a desalination mechanism is arranged at the other end, the desalination mechanism comprises a base, an upper end surface of the base is provided with an inner shell and an outer shell arranged coaxially, a heat storage component and a spraying component are arranged in the inner shell, the heat storage component comprises a mounting ring coaxially located in the inner shell, a plurality of heat storage plates are arranged in an array along a circumferential direction in the mounting ring, the interior of the heat storage plate is hollow and heat storage tubes are arranged, one end of the heat storage tubes in the plurality of heat storage plates is connected through a main input tube, and the other end is connected through a main output tube, two ends of a condenser of the heat pump are respectively connected with the main input tube and the main output tube, the spraying component is used for drawing seawater to spray toward the heat storage plate, and during spraying, the nozzle of the spraying component rotates.

Description

Technical Field

[0001] The present invention relates to the field of waste heat utilization of power plants, and in particular to a seawater desalination device utilizing waste heat of NGCC power plants. Background Art

[0002] NGCC power plant refers to a power plant that uses gas to generate electricity. It is inevitable that a lot of waste heat will be generated during power generation. Based on the current environmental protection concept and energy recycling concept, it is very necessary to recycle and reuse this waste heat. Using waste heat for seawater desalination is one of the ways to utilize waste heat.

[0003] The most common way to desalinate seawater is distillation, which uses heat to evaporate fresh water and then condenses the water vapor into liquid to obtain fresh water resources. However, waste heat is a low-grade heat source, and it is difficult to quickly heat seawater to a sufficient temperature using waste heat. Moreover, as the heating time becomes longer, the heat exchange time between seawater and the air in the surrounding environment also becomes longer, which will directly lead to a relatively low waste heat utilization rate. In addition, the water vapor obtained by evaporation will also release heat in the process of condensing into liquid, and this heat should also be effectively utilized. These are all impossible to achieve with existing seawater desalination technology. Therefore, it is necessary to improve seawater desalination technology. Based on this, the present invention proposes a seawater desalination device that utilizes the waste heat of an NGCC power plant and has a high waste heat utilization rate. Summary of the invention

[0004] In order to solve the problems mentioned in the above background, the present invention provides a seawater desalination device using waste heat from a NGCC power plant.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0006] A seawater desalination device utilizing waste heat from an NGCC power plant comprises a heat pump, one end of the heat pump is provided with a heat collecting component, and the other end is provided with a desalination mechanism, the desalination mechanism utilizes high-quality heat provided by the heat pump to desalinate seawater, the desalination mechanism comprises a base, the upper end surface of the base is provided with an inner shell and an outer shell arranged coaxially, and a heat storage component and a spraying component are provided in the inner shell;

[0007] The heat storage assembly includes a mounting ring coaxially located in the inner shell, a plurality of heat storage plates are arranged in an array along the circumferential direction in the mounting ring, the interior of the heat storage plates is hollow and arranged with heat storage tubes, one end of the heat storage tubes in the plurality of heat storage plates is connected through a main input pipe, and the other end is connected through a main output pipe, and the two ends of the condenser of the heat pump are respectively connected to the main input pipe and the main output pipe, and the spray assembly is used to draw seawater toward the heat storage plate for spraying, and the nozzle of the spray assembly rotates during spraying.

[0008] Furthermore, the distance between the upper surface of the heat storage plate and the axis centerline of the mounting ring decreases from bottom to top.

[0009] Furthermore, the spray assembly includes an outer tube coaxial with the mounting ring and a motor for driving the outer tube to rotate. The upper pipe mouth of the outer tube is located above the heat storage assembly and is provided with a connecting head. A nozzle is radially extended from the outer cylindrical surface of the connecting head. A plurality of nozzles are arranged in an array along the circumferential direction of the connecting head, and a plurality of nozzles are arranged in an array at the bottom of the nozzle along the extension direction.

[0010] Furthermore, the nozzle is arranged at an angle, and the direction of the horizontal initial velocity of the seawater sprayed through the nozzle is consistent with the rotation direction of the outer tube driven by the motor to rotate.

[0011] Furthermore, a scraper rod is provided at the end of the nozzle, and the scraper rod is in contact with the cavity bottom of the inner shell. A slag discharge hole is also provided at the bottom of the inner shell.

[0012] Furthermore, an outer convex edge is provided on the outer surface of the inner shell, and an inner convex edge is provided on the inner wall, the outer convex edge and the inner convex edge are connected through a connecting hole, a secondary drainage pipe extends from the bottom of the outer convex edge, and a main drainage pipe extends from the bottom of the outer shell;

[0013] An outer cover shell extends from the upper opening of the outer shell, and a plurality of vertically arranged condensing fins are arranged in an array along the circumferential direction on the inner wall of the outer cover shell. An upper cover plate is arranged above the inner shell, and the upper cover plate is in the shape of a truncated cone with a diameter decreasing from bottom to top, and the lower end of the upper cover plate is located above the opening of the outer shell.

[0014] Furthermore, an inlay hole is provided in the outer cover shell, a refrigeration pipe is provided in the inlay hole, and the refrigeration pipe is arranged in series on the evaporator of the heat pump.

[0015] Furthermore, a water tank is provided on the upper surface of the upper cover plate, a water inlet of the water tank is provided with a water inlet pipe, and a water outlet is provided with a connecting pipe, the water inlet pipe is used for seawater to enter the water tank, the lower pipe mouth of the outer pipe is connected to the connecting pipe through a rotating joint, and a plurality of cooling fins are arranged in an array on the lower surface of the upper cover plate.

[0016] Furthermore, the lower end of the upper cover plate is connected to the bottom of the condensing fins, and a heat insulation cover is extended upward from the lower end of the upper cover plate, and the water tank is located in the heat insulation cover.

[0017] Furthermore, a boss extends downward from the middle position of the lower surface of the upper cover plate. The boss is in the shape of a cone with a diameter increasing from bottom to top. The connection between the boss and the upper cover plate is rounded. An inner tube is coaxially installed in the outer tube through an inner bracket. A blower is provided at the lower end of the inner tube through a rotating joint, and the upper end of the inner tube is close to the bottom of the boss.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the seawater distillation stage of this scheme:

[0020] 1. Since several heat storage plates are connected in parallel, the nozzle will rotate with the nozzle. Therefore, it is similar to spraying water on a high-temperature iron plate. The seawater will be evaporated in a very short time, and the temperature of the heat storage plate will be reduced accordingly. Then the seawater will be sprayed on the next heat storage plate, and the previous heat storage plate will store heat again. This reciprocating process can greatly improve the efficiency of seawater evaporation and solve the problem that "as the heating time becomes longer, the heat exchange time between seawater and the air in the surrounding environment also becomes longer, which will directly lead to a relatively low waste heat utilization rate";

[0021] 2. The evaporation of seawater will leave sea salt particles on the heat storage plate. In this solution, since the nozzle is arranged at an angle, the direction of the horizontal initial velocity of the seawater sprayed out by the nozzle is consistent with the direction of rotation of the outer tube driven by the motor. Therefore: the rotation will increase the horizontal initial velocity of the seawater, making the impact of the seawater falling on the heat storage plate greater. On the one hand, the impact will act on the sea salt particles and wash them away, preventing the sea salt particles from hindering the contact between the seawater and the heat storage plate. On the other hand, the impact will disperse the seawater and distribute it on the heat storage plate in the form of water droplets with smaller diameters. In this way, the contact area between the seawater and the heat storage plate is increased, the heat exchange efficiency is improved, and the efficiency of seawater evaporation is greatly improved.

[0022] 2. During the water vapor condensation process of this scheme:

[0023] 1. The method of driving the water vapor to flow through the airflow output by the inner tube can make the water vapor flow quickly at the beginning and then flow at a lower speed. Its significance lies in that, on the one hand, the water vapor can leave quickly and flow to the outer shell and the condensation fins to prevent the water vapor from condensing within the range of the inner shell and causing the obtained fresh water to be invalid. On the other hand, the water vapor has a slower flow rate at the condensation fins, which can make sufficient heat exchange between the water vapor and the condensation fins, and the moisture in the water vapor can be almost completely condensed out, and the condensation effect is better;

[0024] On the contrary, it is easy for a person skilled in the art to think of setting a blower at the top pipe to extract air, thereby pulling the water vapor to flow. This method not only causes the water vapor to flow faster at the condensation fins, resulting in a poor condensation effect, but also causes the water vapor to leave the inner shell at a slower speed, resulting in the waste of the obtained fresh water.

[0025] 2. This solution can cool down the water vapor in advance through the water tank, so that the subsequent condensation effect of the water vapor at the condensation fins is better. At the same time, the seawater is preheated, which also makes the subsequent seawater evaporate faster in the distillation stage. In addition, the heat pump will also absorb the heat of the condensation fins, that is, absorb the heat of the water vapor. After this part of the heat is converted into high-quality heat, it will also act on the heat storage component. In this way, the utilization rate of the battery waste heat is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 is a schematic diagram of a heat collecting component;

[0028] Figure 3 is a cross-sectional view of a heat collecting component;

[0029] Figure 4 is a front view of a heat exchange assembly;

[0030] Figure 5 It is a schematic diagram of the dilution mechanism;

[0031] Figure 6 It is a cross-sectional view of the desalination mechanism;

[0032] Figure 7 It is a schematic diagram of a heat storage component and a spray component;

[0033] Figure 8 is a schematic diagram of a heat storage component from an upward perspective;

[0034] Fig. 9 is a schematic diagram of a spray assembly;

[0035] Fig.10 To reduce the local section view of the mechanism Figure 1 ;

[0036] Fig.11 for Fig.10 A magnified view of A in FIG.

[0037] Fig.12 To reduce the local section view of the mechanism Figure 2 .

[0038] The reference numerals in the accompanying drawings are:

[0039] 100, heat pump; 200, heat collecting component; 201, heat collecting pipe; 202, water guide pipe; 203, water guide plate; 204, heat exchange component; 2041, heat exchange pipe; 2042, heat exchange fin; 300, desalination mechanism; 301, base; 302, heat storage component; 3021, mounting ring; 3022, heat storage plate; 3023, heat storage pipe; 3024, main input pipe; 3025, main output pipe; 303, spraying component; 3031, motor; 3032, inner pipe; 3033, outer pipe; 3034 , nozzle; 3035, nozzle; 3036, scraper rod; 304, inner shell; 3041, slag discharge hole; 3042, outer convex edge; 3043, auxiliary drain pipe; 3044, inner convex edge; 3045, connecting hole; 3046, air hole; 305, outer shell; 3051, main drain pipe; 306, upper cover plate; 3061, cooling fins; 307, water tank; 3071, water inlet pipe; 308, connecting pipe; 309, condensing fins; 310, heat insulation cover; 311, top shell; 312, top pipe; 400, outer cover shell. DETAILED DESCRIPTION

[0040] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0041] Reference Figure 1-Figure 12 A seawater desalination device using waste heat from an NGCC power plant includes a heat pump 100, a heat collecting component 200 is disposed at one end of the heat pump 100, and a desalination mechanism 300 is disposed at the other end, wherein:

[0042] The heat pump 100 can extract heat from the low temperature zone and convert it into higher temperature energy, that is, convert low-grade heat into high-grade heat, which is achievable by the prior art and will not be described in detail in this solution;

[0043] The heat collecting component 200 is arranged at the location where the waste heat of the power plant is generated. The NGCC power plant uses gas to generate electricity. The places where a large amount of waste heat is generated include smoke exhaust ports, cooling ports, exhaust ports, etc. Therefore, the heat collecting component 200 is correspondingly arranged in several groups and is installed one by one in these places to improve the heat exchange between the waste heat of the power plant and the heat pump 100, thereby improving the effect of the heat pump 100 in capturing waste heat and improving the waste heat utilization rate. It should be noted that only one group is shown in this scheme;

[0044] The desalination mechanism 300 utilizes the high-quality heat provided by the heat pump 100 to desalinate the seawater.

[0045] Heat collecting member 200:

[0046] Reference Figure 2-Figure 4The heat collecting component 200 includes a heat collecting pipe 201 disposed at the location where the waste heat of the power plant is generated. A heat exchange component 204 is disposed in the heat collecting pipe 201. Further, the heat exchange component 204 includes a heat exchange pipe 2041 and a heat exchange fin 2042. Figure 4 The outer surface of the heat exchange pipe 2041 is elliptical in shape, and the array of heat exchange pipes 2041 is provided with a plurality of heat exchange pipes 2041, and two adjacent heat exchange pipes 2041 are connected through branch pipes, that is, the plurality of heat exchange pipes 2041 are arranged in series. Similarly, the heat exchange fins 2042 are arranged vertically and a mounting pipe is provided at the bottom. The heat exchange fins 2042 are provided with a plurality of mounting pipes at the bottom, and the mounting pipes are arranged in series. Similarly, the whole formed by the heat exchange fins 2042 arranged in series and the whole formed by the heat exchange pipes 2041 arranged in series are also connected in series, and finally a heat exchange assembly 204 is formed, and the two ends of the heat exchange assembly 204 are respectively connected to the two ends of the evaporator of the heat pump 100. , that is, the heat exchange component 204 is connected in series to the evaporator pipe of the heat pump 100; its significance lies in that, during the heat exchange process between the evaporator of the heat pump 100 and the waste heat of the power plant, the gas medium (such as water vapor or exhaust gas) containing the waste heat will pass through the heat exchange pipe 2041 and the heat exchange fins 2042 when passing through the collector 201, wherein, based on the Bernoulli principle, the gas medium will fit tightly with the heat exchange pipe 2041. In addition, since the gas flow rate cannot be exactly the same, also based on the Bernoulli principle, the flow of the gas medium will drive the heat exchange fins 2042 to swing, both of which can increase the heat exchange effect between the gas medium and the evaporator, and enable the heat pump 100 to absorb waste heat to the maximum extent.

[0047] Furthermore, during the heat exchange process, the water in the gas medium will be converted into liquid, so it is necessary to guide it away, refer to Figure 3 The outer surface of the heat collecting tube 201 is inclined downward and provided with a water guide pipe 202, which is located below the heat exchange assembly 204. A water guide plate 203 parallel to the water guide pipe 202 is also provided in the heat collecting tube 201, one end of the water guide plate 203 extends into the water guide pipe 202, and an avoidance hole for avoiding the flow of gas medium is opened on the water guide plate 203. Preferably, two water guide plates 203 are provided in the vertical direction, and the avoidance holes on the two water guide plates 203 are staggered. In this way, water will be guided and discharged by the water guide plate 203 instead of dripping down and returning to the power plant.

[0048] Desalination Agency 300:

[0049] Reference Figure 5-Figure 12 The desalination mechanism 300 includes a base 301, and the upper end surface of the base 301 is provided with an inner shell 304 and an outer shell 305 arranged coaxially, wherein:

[0050] The outer surface of the inner shell 304 is provided with an outer convex edge 3042, and the inner wall is provided with an inner convex edge 3044, and the two are connected through a connecting hole 3045. A secondary drainage pipe 3043 extends from the bottom of the outer convex edge 3042, and a main drainage pipe 3051 extends from the bottom of the outer shell 305.

[0051] A slag discharge hole 3041 is also formed at the bottom of the inner shell 304 .

[0052] An outer cover shell 400 extends from the upper opening of the outer shell 305, and an upper cover plate 306 is arranged above the inner shell 304. The upper cover plate 306 is in the shape of a truncated cone with a diameter decreasing from bottom to top. The lower end of the upper cover plate 306 is located above the opening of the outer shell 305. Preferably, a plurality of cooling fins 3061 are arranged in an array on the lower surface of the upper cover plate 306.

[0053] A water tank 307 is provided on the upper surface of the upper cover plate 306. The water inlet of the water tank 307 is provided with a water inlet pipe 3071, and the water outlet is provided with a connecting pipe 308. The water inlet pipe 3071 is used for seawater to enter the water tank 307. The seawater can be pressed into the water tank 307 by using a water pump technology, or a water tank higher than the water tank 307 is provided at the end of the water inlet pipe 3071. The seawater in the water tank is sent into the water tank 307 by utilizing the height difference. After the water tank 307 is filled with seawater, the seawater will be discharged through the connecting pipe 308.

[0054] The inner wall of the outer cover shell 400 is provided with a plurality of vertically arranged condensing fins 309 in an array along the circumferential direction. In addition, in order to prevent heat interference between condensation at the condensing fins 309 and heating at the inner shell 304, the lower end of the upper cover plate 306 is connected to the bottom of the condensing fins 309, and a heat insulation cover 310 is extended upward from the lower end of the upper cover plate 306, and the water tank 307 is located in the heat insulation cover 310.

[0055] A top shell 311 extends from the upper opening of the outer cover shell 400 , and a top pipe 312 extends from the upper opening of the top shell 311 for exhaust.

[0056] Preferably, an inlay hole is provided in the outer cover shell 400, and a refrigeration pipe is provided in the inlay hole. The refrigeration pipe is also arranged in series on the evaporator of the heat pump 100. Its significance is that when water vapor passes through the condensing fins 309, the heat of the water vapor can also be absorbed by the heat pump 100 to achieve the purpose of recycling waste heat, and the condensing fins 309 can also be cooled to assist the condensation of water vapor.

[0057] Reference Figure 6 and Figure 7A heat storage component 302 and a spray component 303 are provided in the inner shell 304, wherein the heat storage component 302 utilizes the high-quality heat provided by the heat pump 100 to make its upper surface in a high-temperature state, and the spray component 303 is used to spray seawater onto the upper surface of the heat storage component 302, and the two cooperate to realize the distillation of seawater.

[0058] Specifically, refer to Figure 7 and Figure 8 The heat storage component 302 includes a mounting ring 3021 coaxially located in the inner shell 304, and a plurality of heat storage plates 3022 are arranged in an array along the circumferential direction in the mounting ring 3021. The interior of the heat storage plate 3022 is hollow and is arranged with a heat storage tube 3023.

[0059] One end of the heat storage tubes 3023 in the plurality of heat storage plates 3022 is connected via the main input pipe 3024 , and the other end is connected via the main output pipe 3025 , that is, the plurality of heat storage plates 3022 are arranged in parallel.

[0060] The two ends of the condenser of the heat pump 100 are connected to the main input pipe 3024 and the main output pipe 3025 respectively, that is, the heat storage component 302 is arranged in series on the condenser of the heat pump 100, based on which the high-quality heat of the heat pump 100 is transferred to the heat storage plate 3022, making the heat storage plate 3022 in a high temperature state.

[0061] Preferably, the upper surface of the heat storage plate 3022 is in the shape of an arc or a slope, and the distance between the upper surface of the heat storage plate 3022 and the axis of the mounting ring 3021 decreases from bottom to top.

[0062] Specifically, refer to Figure 7 and Fig. 9 The spray assembly 303 includes an outer tube 3033 coaxial with the mounting ring 3021, the lower pipe opening of the outer tube 3033 is connected to the connecting pipe 308 via a rotating joint, the upper pipe opening is located above the heat storage assembly 302 and is provided with a connector, a nozzle 3034 is radially extended from the outer cylindrical surface of the connector, and a plurality of nozzles 3034 are arranged in an array along the circumferential direction of the connector, three of which are shown in the attached drawings of this scheme, and a plurality of nozzles 3035 are arranged in an array at the bottom of each nozzle 3034 along the extension direction.

[0063] The spray assembly 303 also includes a motor 3031 for driving the outer tube 3033 to rotate. Furthermore, the nozzle 3035 is arranged at an angle, and the horizontal initial velocity direction of the seawater sprayed through the nozzle 3035 is consistent with the rotation direction of the outer tube 3033 driven by the motor 3031. The benefits are described later.

[0064] The spray assembly 303 also includes an inner tube 3032 coaxially located within the outer tube 3033. The lower end of the inner tube 3032 is connected to the airflow through a rotating joint, such as a blower. A boss extends downward from the middle position of the lower surface of the upper cover plate 306. The boss is in the shape of a cone with a diameter increasing from bottom to top. The connection between the boss and the upper cover plate 306 is rounded to form an arc surface. The upper end of the inner tube 3032 is close to the bottom of the boss.

[0065] Preferably, a scraper rod 3036 is provided at the end of the nozzle 3034 , and the scraper rod 3036 is in contact with the bottom of the inner shell 304 .

[0066] The desalination mechanism 300 is one of the cores of this solution, and its working principle is as follows:

[0067] Seawater distillation stage:

[0068] After the waste heat is collected by the heat pump 100 and converted into high-quality heat, it is transferred to the heat storage plate 3022, making the heat storage plate 3022 in a high-temperature state;

[0069] The seawater enters the water tank 307 through the water inlet pipe 3071, and then passes through the connecting pipe 308, the rotating joint, the outer pipe 3033, the connecting head, and enters the nozzle 3034, and finally is sprayed out through the nozzle 3035. At the same time, the motor 3031 drives the outer pipe 3033 to rotate, and the nozzle 3034 rotates together. The two cooperate to spray the seawater toward the heat storage plate 3022 to achieve seawater distillation.

[0070] In the above seawater distillation process:

[0071] 1. Since several heat storage plates 3022 are connected in parallel, the nozzle 3035 rotates with the nozzle 3034. Therefore, similar to spraying water onto a high-temperature iron plate, the seawater will be evaporated in a very short time, and the temperature of the heat storage plate 3022 will be reduced accordingly. Then the seawater will be sprayed onto the next heat storage plate 3022, and the previous heat storage plate 3022 will store heat again. This reciprocating process can greatly improve the efficiency of seawater evaporation and solve the problem that "as the heating time becomes longer, the heat exchange time between the seawater and the air in the surrounding environment also becomes longer, which will directly lead to a relatively low waste heat utilization rate";

[0072] 2. After the seawater evaporates, the water forms water vapor, and the other components form sea salt particles and remain on the heat storage plate 3022. This will prevent the seawater from contacting the heat storage plate 3022 when the seawater evaporates next time, resulting in a reduction in evaporation efficiency. It is easy for a person skilled in the art to think of providing a cleaning head that rotates with the nozzle 3034 to clean the heat storage plate 3022. However, the cleaning head will also take away some heat when in contact with the heat storage plate 3022, which is not conducive to the rapid evaporation of seawater. In contrast, in this solution:

[0073] Since the nozzle 3035 is arranged at an angle, the direction of the initial horizontal velocity of the seawater sprayed through the nozzle 3035 is consistent with the direction of rotation of the outer tube 3033 driven by the motor 3031. Therefore, the rotation will increase the initial horizontal velocity of the seawater, making the impact of the seawater on the heat storage plate 3022 greater. On the one hand, the impact will act on the sea salt particles and wash them away, preventing the sea salt particles from hindering the contact between the seawater and the heat storage plate 3022. On the other hand, the impact will disperse the seawater and distribute it on the heat storage plate 3022 in the form of water droplets with smaller diameters. In this way, the contact area between the seawater and the heat storage plate 3022 is increased, the heat exchange efficiency is improved, and the efficiency of seawater evaporation is greatly improved.

[0074] Water vapor condensation stage:

[0075] The water vapor floats up to the upper cover plate 306. At the same time, the airflow provided by the blower is blown out through the inner tube 3032 and flows along the curved surface of the convex column. During the flow, the airflow pushes the water vapor to flow toward the outer shell 305, and then flows upward along the condensing fins 309. At the same time, the evaporator of the heat pump 100 absorbs the heat of the condensing fins 309 and cools the condensing fins 309. In addition, it should be noted that when the airflow pushes the water vapor to flow, based on the Bernoulli principle, it will actively pull the water vapor below toward the upper cover plate 306, thereby increasing the flow rate of the water vapor and causing the water vapor to flow to the outer shell 305 as quickly as possible. In order to achieve this purpose, refer to Fig.11 , an air hole 3046 is provided on the inner shell 304;

[0076] During the flow of water vapor, most of the water vapor is condensed into liquid at the condensing fins 309 and falls into the outer shell 305 and is discharged through the main drain pipe 3051. A small part of the water vapor will be condensed at the cooling fins 3061 and then flow into the outer shell 305 along the cooling fins 3061. A small part of the water vapor will be condensed on the inner wall of the inner shell 304 and then flow into the outer convex edge 3042 along the inner wall of the inner shell 304, the inner convex edge 3044 and the connecting hole 3045 and be discharged through the auxiliary drain pipe 3043. In addition, a very small part of water droplets will fall into the inner shell 304 and together with the waste liquid and sea salt particles formed after the distillation of seawater, will be scraped by the scraper rod 3036 and discharged at the slag discharge hole 3041.

[0077] In the above water vapor condensation process:

[0078] 1. The method of driving the water vapor to flow by the airflow output by the inner tube 3032 can make the water vapor flow quickly at the beginning and then flow at a lower speed. Its significance lies in that, on the one hand, the water vapor can leave quickly and flow to the outer shell 305 and the condensation fins 309 to prevent the water vapor from condensing in the range of the inner shell 304 and causing the obtained fresh water to be invalid. On the other hand, the flow rate of the water vapor at the condensation fins 309 is slow, which can make the water vapor and the condensation fins 309 have sufficient heat exchange, and the water in the water vapor is almost completely condensed out, and the condensation effect is better;

[0079] On the contrary, it is easy for a person skilled in the art to think of setting a blower at the top pipe 312 to extract air, thereby pulling the water vapor to flow. This method not only causes the water vapor to flow faster at the condensing fins 309, resulting in a poor condensation effect, but also causes the water vapor to leave the inner shell 304 at a slower speed, resulting in the waste of the obtained fresh water.

[0080] 2. This solution can cool the water vapor in advance through the water tank 307, so that the subsequent condensation effect of the water vapor at the condensation fins 309 is better. At the same time, the seawater is preheated, which also makes the subsequent seawater evaporate faster in the distillation stage. In addition, the heat pump 100 will also absorb the heat of the condensation fins 309, that is, absorb the heat of the water vapor. After this part of the heat is converted into high-quality heat, it will also act on the heat storage component 302. In this way, the battery waste heat utilization rate is higher.

[0081] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A seawater desalination device utilizing waste heat from an NGCC power plant, comprising a heat pump (100), wherein a heat collecting component (200) is disposed at one end of the heat pump (100) and a desalination mechanism (300) is disposed at the other end, wherein: The desalination mechanism (300) utilizes the high-quality heat provided by the heat pump (100) to desalinate seawater. The desalination mechanism (300) comprises a base (301). An inner shell (304) and an outer shell (305) arranged coaxially are disposed on the upper end surface of the base (301). A heat storage component (302) and a spray component (303) are disposed in the inner shell (304). The heat storage component (302) comprises a mounting ring (3021) coaxially located in the inner shell (304); a plurality of heat storage plates (3022) are arranged in an array along a circumferential direction in the mounting ring (3021); the interior of the heat storage plate (3022) is hollow and is provided with a heat storage tube (3023); one end of the heat storage tube (3023) in the plurality of heat storage plates (3022) is connected via a main input tube (3024) and the other end is connected via a main output tube (3025); the two ends of the condenser of the heat pump (100) are respectively connected to the main input tube (3024) and the main output tube (3025); the spraying component (303) is used to draw seawater toward the heat storage plate (3022) for spraying; during spraying, the spray head (3035) of the spraying component (303) rotates; The spray assembly (303) comprises an outer tube (3033) coaxial with the mounting ring (3021) and a motor (3031) for driving the outer tube (3033) to rotate; the upper tube opening of the outer tube (3033) is located above the heat storage assembly (302) and is provided with a connector; a nozzle (3034) is radially extended from the outer circumferential surface of the connector; a plurality of nozzles (3034) are arranged in an array along the circumferential direction of the connector; and a plurality of nozzles (3035) are arranged in an array at the bottom of the nozzle (3034) along the extension direction; The outer surface of the inner shell (304) is provided with an outer convex edge (3042), and the inner wall is provided with an inner convex edge (3044); the outer convex edge (3042) and the inner convex edge (3044) are connected via a connecting hole (3045); a secondary drainage pipe (3043) extends from the bottom of the outer convex edge (3042); and a main drainage pipe (3051) extends from the bottom of the outer shell (305); An outer cover shell (400) extends from the upper opening of the outer shell (305); a plurality of condensing fins (309) arranged vertically are arranged in an array along the circumferential direction on the inner wall of the outer cover shell (400); an upper cover plate (306) is arranged above the inner shell (304); the upper cover plate (306) is in the shape of a truncated cone with a diameter decreasing from bottom to top; and the lower end of the upper cover plate (306) is located above the opening of the outer shell (305); An inlay hole is provided in the outer casing (400), a refrigeration pipeline is provided in the inlay hole, and the refrigeration pipeline is arranged in series on the evaporator of the heat pump (100); A water tank (307) is provided on the upper surface of the upper cover plate (306); a water inlet of the water tank (307) is provided with a water inlet pipe (3071), and a water outlet is provided with a connecting pipe (308); the water inlet pipe (3071) is used for seawater to enter the water tank (307); a lower pipe opening of the outer pipe (3033) and the connecting pipe (308) are connected via a rotating joint; and a plurality of cooling fins (3061) are provided in an array on the lower surface of the upper cover plate (306); The lower end of the upper cover plate (306) is connected to the bottom of the condensing fin (309), and a heat insulation cover (310) extends upward from the lower end of the upper cover plate (306), and the water tank (307) is located inside the heat insulation cover (310); A convex column extends downward from the middle of the lower surface of the upper cover plate (306), and the convex column is in the shape of a cone with a diameter increasing from bottom to top. The connection between the convex column and the upper cover plate (306) is rounded. An inner tube (3032) is coaxially mounted in the outer tube (3033) via an inner bracket. A blower is arranged at the lower end of the inner tube (3032) via a rotary joint. The upper end of the inner tube (3032) is close to the bottom of the convex column. Water vapor floats up to the upper cover plate (306), and airflow provided by the blower is blown out through the inner tube (3032).

2. The seawater desalination device using waste heat from NGCC power plants according to claim 1, characterized in that: The distance between the upper surface of the heat storage plate (3022) and the axis of the mounting ring (3021) decreases from bottom to top.

3. The seawater desalination device using waste heat from NGCC power plants according to claim 1, characterized in that: The nozzle (3035) is arranged obliquely, and the horizontal initial velocity direction of the seawater sprayed through the nozzle (3035) is consistent with the rotation direction of the outer tube (3033) driven by the motor (3031) to rotate.

4. The seawater desalination device using waste heat from NGCC power plants according to claim 1, characterized in that: A scraper rod (3036) is provided at the end of the nozzle (3034), and the scraper rod (3036) is in contact with the cavity bottom of the inner shell (304). A slag discharge hole (3041) is also provided at the bottom of the inner shell (304).

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