System for providing mangrove forest seedling salinity exercise by using natural seawater and seedling raising method

Abstract

The invention discloses a system for providing mangrove forest seedlings with natural seawater for salinity exercise and a seedling raising method. The system for salinity exercise comprises a settling pond, a settling and filtering device, a salinity adjusting device and a circulating pump. Wherein the bottom of the sedimentation tank is obliquely arranged, a drain pipe is arranged on the side wall of the sedimentation tank and is higher than the bottom of the sedimentation tank, the sedimentation tank is used for introducing seawater, and a desilting opening is further formed in the sedimentation tank and is formed in the lowest position of the bottom of the sedimentation tank. The settling and filtering device comprises a box body, a plurality of settling plates and a plurality of retention filter plates, and is used for further settling and filtering seawater conveyed from the settling pond; the salinity adjusting device is used for adjusting the salinity of the seawater by utilizing an evaporation effect and a condensation effect; and the circulating pump circularly pumps seawater, so that the concentration degree of the salinity of the salinity adjusting device at the first line is increased, the salinity of the finally output seawater is ensured to meet the expectation, the salinity exercising process of the mangrove seedlings is ensured to be smoothly carried out, and the trouble of manually adding salt and water is also reduced.

Description

Technical Field

[0001] The invention relates to the technical field of salinity training during mangrove seedling cultivation, and in particular to a system and a seedling cultivation method for providing salinity training to mangrove seedlings using natural seawater. Background Art

[0002] Mangrove seedling cultivation is an important part of current marine ecological protection. During the process of mangrove seedling cultivation, the mangrove seedlings need to be trained in salinity and the salinity adaptation range of the mangrove seedlings needs to be adjusted to make it easier for the mangrove seedlings to survive after transplanting.

[0003] In the past, salinity training was usually ignored during the seedling cultivation process, which resulted in the mangrove seedlings being easily unsuitable for the salinity of seawater due to seasonal changes after transplantation, thus causing the death of the mangrove seedlings. Current technology is almost all in the direction of freshwater mangrove planting, while ignoring the survival problem of transplanted mangrove seedlings during the normal restoration of mangrove ecology. Therefore, there is an urgent need for a system that uses natural seawater to provide salinity training for mangrove seedlings to fill this technical gap. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a system for using natural seawater to provide salinity training for mangrove seedlings, which can increase the survival rate of mangrove seedlings after transplanting.

[0005] The present invention also proposes a seedling cultivation method using the above-mentioned system that utilizes natural seawater to provide salinity training for mangrove seedlings.

[0006] According to a first aspect of the present invention, a system for using natural seawater to provide salinity training for mangrove seedlings includes a sedimentation tank, a sedimentation and filtration device, a salinity regulating device and a circulating pump. The sedimentation tank is used to precipitate seawater; the sedimentation and filtration device includes a box body, a plurality of sedimentation plates and a plurality of retention filter plates. The water inlet end of the box body is connected to the sedimentation tank. A plurality of the sedimentation plates extend and are connected to the right side wall, the front side wall and the rear side wall in the box body. A plurality of the retention filter plates extend and are connected to the left side wall, the front side wall and the rear side wall in the box body. The sedimentation plates and the retention filter plates are alternately spaced in the up and down directions. The sedimentation plates are arranged to be tilted upward and extend to the top of the retention filter plates of the next layer. The retention filter plates are arranged to be tilted downward and extend to the top of the sedimentation plates of the next layer. The sedimentation plates are used to receive and overflow seawater. The salinity regulating device comprises a dispersion component, a concentration component, a condenser and a dilution container. The water outlet of the box body is connected with a four-way pipe. The first outlet of the four-way pipe is connected with the dispersion component and the concentration component in sequence. The water outlet of the concentration component is connected with a first valve. The second outlet of the four-way pipe is connected with a second valve. The third outlet of the four-way pipe is connected with the water inlet of the dilution container. The water outlet of the dilution container is connected with a third valve. The dispersion component and the concentration component are both connected to the dilution container through the condenser. The first valve, the second valve and the third valve are collected and connected to the output pipe. The output pipe is used to supply seawater to the mangrove seedlings.

[0007] At least the following beneficial effects are achieved: the sedimentation tank is set to precipitate natural seawater, so that the silt and other solid debris in the seawater are precipitated at the bottom of the sedimentation tank, thereby ensuring the cleanliness of the seawater entering the sedimentation and filtration device and reducing the operating load of the sedimentation and filtration device; the upwardly inclined sedimentation plate and the box body define a space shaped like a water receiving bucket, so that the seawater transported from the sedimentation tank can be received by the sedimentation plate; under the action of gravity, the silt in the seawater will be precipitated at the bottom of the water receiving bucket, and the overflowed seawater may flow to the top of the retention filter plate of the next layer mixed with the residual silt; and the downwardly inclined structure of the retention filter plate allows the seawater to be smoothly retained, while the silt is intercepted by the surface of the retention filter plate due to the action of gravity; and the retention filter plate has a filtering function, which can ensure the efficiency and speed of seawater purification; the sedimentation plate and the retention filter plate cooperate to further improve the purity of the seawater, realize the purification of the silt in the seawater, and reduce the sedimentation and filtration device. The total amount of seawater, the sedimentation and filtration device alternately performs sedimentation and retention filtration, so that the seawater is further purified and filtered, so as to avoid the solid impurities in the seawater from damaging the mangrove seedlings, and to avoid the accumulation of sand in the planting pit, and also to avoid the blockage of sand in the dispersed component. The salinity regulating device is set up by combining dispersed heating and evaporation concentration, so that the seawater can be evaporated as much as possible to achieve the purpose of increasing the salinity, and the evaporated water vapor can be condensed and fed back to the natural seawater to dilute the natural seawater. The salinity regulation is achieved through this device. If the salinity of the seawater in the first outlet line increases, the salinity of the seawater in the third outlet line decreases, and dynamic adjustment is achieved. The circulating pump set up plays an additional promoting role. When the salinity adjustment efficiency is too low, the seawater of each line is incrementally adjusted by the peripheral circulating pump, so as to ensure that the salinity of the seawater finally output is in line with expectations, ensure the smooth progress of the salinity training process of the mangrove seedlings, and reduce the trouble of artificially adding salt and water.

[0008] According to some embodiments of the present invention, the number of the sedimentation plates is greater than the number of the retention filter plates, the uppermost sedimentation plate is located above the uppermost retention filter plate, and the lowermost sedimentation plate is located below the lowermost retention filter plate. This arrangement allows the seawater to first pass through the sedimentation plates and finally leave from the sedimentation plates, thereby ensuring the purity of the seawater and improving the efficiency of seawater purification.

[0009] According to some embodiments of the present invention, a circulation pump and a first salinity detector are further included, one end of the circulation pump is connected to the pipeline between the concentrating component and the first valve, the other end of the circulation pump is connected to the pipeline between the first outlet and the dispersion component, the first salinity detector is arranged on the pipeline between the concentrating component and the first valve, a sixth valve is arranged on the pipeline where the circulation pump is located, the circulation pump is used to pump the seawater discharged from the concentrating component to the dispersion component, the circulation pump and the first salinity detector are arranged to cooperate to adjust the salinity, so as to facilitate the output of seawater according to the salinity requirements.

[0010] According to some embodiments of the present invention, the dispersion component includes a dispersion mesh bed, a sealed shell and a distributor, the dispersion mesh bed and the distributor are both arranged in the sealed shell, the distributor is arranged at the upper end of the dispersion mesh bed, the first outlet is connected to the water inlet of the distributor, the water outlet of the sealed shell is connected to the concentration component, the distributor is used to output a water curtain to the dispersion mesh bed, the dispersion mesh bed is used to disperse seawater and output it to the concentration component, the sealed shell is connected to the condenser through a steam pipe, the dispersion component has a simple structure, and the distributor and the dispersion mesh bed are combined to improve the seawater dispersion efficiency.

[0011] According to some embodiments of the present invention, the distributor includes a water receiving trough and a pipe head, one end of the pipe head is connected to the first outlet, and the other end of the pipe head is connected to the water receiving trough, the pipe head is arranged in the middle of the water receiving trough, and the inner wall at the intersection of the pipe head and the water receiving trough is provided with a guide slope, the length direction of the water receiving trough extends along the width direction of the dispersion mesh bed, the water receiving trough is used to distribute seawater along the width direction of the dispersion mesh bed so that the overflowed seawater forms a water curtain, and the distributor realizes rapid lateral distribution of the water column in the water receiving trough through the guide slope, which is convenient for forming a stable water curtain in the later stage.

[0012] According to some embodiments of the present invention, the concentration component includes an evaporation plate, a collecting hood and a fan, the evaporation plate is provided with an evaporation flow channel arranged in an S shape, one end of the evaporation flow channel is connected to the water outlet of the sealed shell, and the other end of the evaporation flow channel is connected to the first valve, the evaporation plate is arranged in the collecting hood, the collecting hood seals the evaporation plate, the collecting hood is connected to the condenser through a steam pipe, the fan is arranged on the steam pipe, and the fan is used to draw water vapor to the condenser, the concentration component has a simple structure, is suitable for evaporating seawater, and the evaporation flow channel arranged in an S shape can increase the travel distance of seawater, increase the evaporation time of seawater, and increase the upper limit of the concentration of seawater salinity.

[0013] According to some embodiments of the present invention, the condenser includes an insulation box and a metal plate. The metal plates are provided in plurality and are arranged obliquely in the insulation box. One end of the insulation box is connected to the steam pipe, and the other end of the insulation box is connected to the dilution container. The condenser uses the metal plates for condensation, thereby reducing power input and saving energy and reducing consumption.

[0014] According to some embodiments of the present invention, a stirring device is provided in the dilution container, the stirring device is used to stir the seawater in the dilution container, the water inlet of the dilution container is higher than the water outlet of the dilution container, and the stirring device is provided to improve the dilution efficiency.

[0015] According to some embodiments of the present invention, a plug-in port is provided in the housing, and the filter plate is detachably plugged into the plug-in port, so that the filter plate is convenient to disassemble and assemble, and easy to replace.

[0016] According to a second aspect of the present invention, a method for raising seedlings, using the system for using natural seawater to provide salinity training for mangrove seedlings, comprises the following steps: Water is stored, a sedimentation tank is set up, seawater is introduced into the sedimentation tank, and the seawater is allowed to stand in the sedimentation tank for a preset time, so that the silt in the seawater is settled at the bottom of the sedimentation tank; Sedimentation and filtration, the seawater in the sedimentation tank is discharged to the first sedimentation plate in the box, the sedimentation plate precipitates the silt in the seawater, and the seawater overflows to the first retention filter plate, the first retention filter plate retains part of the silt in the seawater and the other part of the silt flows to the second sedimentation plate, at the same time, the first retention filter plate filters the seawater, the filtered part of the seawater flows to the second retention filter plate, the other part of the filtered seawater and the unfiltered seawater both flow to the second sedimentation plate, and so on until the sedimentation plate at the bottom overflows the seawater to the water outlet of the box; salinity adjustment, opening the second outlet, closing the first outlet and the third outlet, and supplying seawater to the mangrove seedlings through the second outlet through the output pipe; Alternatively, the first outlet is opened, and the second outlet and the third outlet are closed, and the seawater filtered by the filtration device is passed through the first outlet to the dispersion component, and the seawater is dispersed by the dispersion component, and the seawater dispersed by the dispersion component is heated and preliminarily evaporated. Thereafter, the seawater heated by the dispersion component is discharged to the concentration component, and the heated seawater is evaporated and concentrated for a second time in the concentration component, and then the salinity value is obtained by detection and it is determined whether it exceeds the first preset salinity value. If it exceeds, the first valve is opened and the circulation pump is opened to circulate and evaporate the seawater until the salinity value of the seawater reaches the preset salinity value, and the water vapor generated by the seawater in the dispersion component and the concentration component enters the condenser for condensation, and the condensed fresh water enters the dilution container for storage; Alternatively, the third outlet is opened, the first outlet and the second outlet are closed, the seawater flows into the dilution container and mixes with the stored condensed water, and then the salinity value is obtained by detection and it is determined whether it is lower than the second preset salinity value. If it is lower, the third valve is opened and seawater is supplied to the mangrove seedlings through the output pipe; if it is not lower, the third valve is kept closed and fresh water is added to the dilution container to dilute the seawater until the salinity value is lower than the second preset salinity value; Transplanting: transplant the mangrove seedlings that have been cultivated through irrigation.

[0017] A seedling cultivation method according to an embodiment of the present invention has at least the following beneficial effects: the mangrove seedlings cultivated by the above method are subjected to salinity training, and the mangrove seedlings have adapted to the changes in salinity during the cultivation process, thereby ensuring that they can adapt to the salinity changes of seawater in the natural environment after transplanting, thereby improving the survival rate of the mangrove seedlings.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 A schematic diagram of a system for using natural seawater to provide salinity training to mangrove seedlings according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of a salinity regulating device is shown; Figure 3 for Figure 1 A schematic diagram of a distributor is shown; Figure 4 for Figure 1A schematic diagram of a packing pack for a condenser in a salinity-trained system is shown; Figure 5 Schematic diagram of the filtration device.

[0020] Sedimentation tank 100, drainage pipe 110, silt removal port 120; Sedimentation and filtration device 200, housing 210, plug port 211, sedimentation plate 220, retention filter plate 230; Salinity adjustment device 300, dispersion assembly 310, sealed housing 311, dispersion net bed 312; Distributor 313, water receiving trough 313a, pipe head 313b, diversion slope 313c; Concentration assembly 320, evaporation plate 321, collection cover 322, fan 323, evaporation flow channel 324; Condenser 330, temperature-isolating box 331, sealing cover 331a, socket 331b, stuffing pack 331c, metal plate 332; Dilution container 340, stirring device 341; A four-way pipe 350, a first outlet 351, a second outlet 352, and a third outlet 353; A first valve 361, a second valve 362, a third valve 363, a fourth valve 364, a fifth valve 365, and a sixth valve 366; A water supply pipe 380, a first salinity detector 390, and a second salinity detector 391; Circulation pump 400 and output pipe 500 . DETAILED DESCRIPTION

[0021] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] It should be noted that the condenser 330 can be an ordinary metal plate, and the steam is condensed by the relatively cold property of the metal plate itself. The purpose of setting the temperature insulation box 331 is to prevent the metal plate from adapting to the atmospheric temperature. In addition, if the condensation effect of the metal plate is not good, the condenser of the air conditioner can also be set in the temperature insulation box 331. The condenser of the air conditioner certainly also includes other components of the air conditioner such as the compressor, etc., which are mainly necessary components to complete the condensation work of the condenser. This is a common misappropriation of equipment. As for the power source of the air conditioner, it can be ordinary electricity, or it can be a wind turbine and energy storage module set up on the seashore, and the wind turbine can be used to generate electricity and transmit it to the energy storage module for energy storage. When electricity is needed, the compressor and energy storage module of the condenser are connected.

[0026] Reference Figures 1 to 5 According to the first embodiment of the present invention, a system for using natural seawater to provide salinity training for mangrove seedlings includes a sedimentation tank, a filtration device, a salinity regulating device and a circulation pump.

[0027] Among them, refer to Figure 1 The bottom of the sedimentation tank 100 is set at an angle. A drainage pipe 110 is opened on the side wall of the sedimentation tank 100. The drainage pipe 110 is higher than the bottom of the sedimentation tank 100. The sedimentation tank 100 is used to introduce seawater. The sedimentation tank 100 also has a silt removal port 120, which is set at the lowest position of the bottom of the sedimentation tank 100.

[0028] Reference Figure 1 and Figure 5The sedimentation and filtration device 200 includes a box body 210, a plurality of sedimentation plates 220 and a plurality of retention filter plates 230. The water inlet end of the box body 210 is connected to the drain pipe 110. The plurality of sedimentation plates 220 extend and connect to the right side wall, the front side wall and the rear side wall in the box body 210. The plurality of retention filter plates 230 extend and connect to the left side wall, the front side wall and the rear side wall in the box body 210. The sedimentation plates 220 and the retention filter plates 230 are alternately spaced in the up and down directions. The sedimentation plates 220 are tilted upward and extend to the top of the retention filter plates 230 of the next layer. The retention filter plates 230 are tilted downward and extend to the top of the sedimentation plates 220 of the next layer. The sedimentation plates 220 are used to receive and overflow seawater and precipitate silt. The retention filter plates 230 are used to filter seawater and retain part of the silt and let the other part of the silt flow to the sedimentation plates 220 of the next layer.

[0029] Reference Figure 2 The salinity adjusting device 300 includes a dispersion component 310, a concentration component 320, a condenser 330 and a dilution container 340. The water outlet of the housing 210 is connected to a four-way pipe 350. The first outlet 351 in the four-way pipe 350 is connected to the water inlet of the dispersion component 310. The water outlet of the dispersion component 310 is connected to the concentration component 320. The water outlet of the concentration component 320 is connected to a first valve 361. The second outlet 352 in the four-way pipe 350 is connected to a second valve 362. The third outlet 353 in the four-way pipe 350 is connected to the water inlet of the dilution container 340. The water outlet of the dilution container 340 is connected to a third valve 363. The dispersion component 310 and the concentration component 320 are both connected to the condenser 330 through a steam pipeline. The condenser 330 is connected to the dilution container 340. The first valve 361, the second valve 362 and the third valve 363 are connected to the output pipe 500, the first outlet 351 and the dispersion component 310 are connected with the fourth valve 364, the third outlet 353 and the dilution container 340 are connected with the fifth valve 365, the output pipe 500 is used to supply seawater to the mangrove seedlings, the dispersion component 310 includes a dispersion net bed 312, the dispersion net bed 312 includes a plurality of sheets that are spatially staggered, each sheet extends along a vertical bend, the concentration component 320 is used to evaporate seawater, the condenser 330 is used to condense the water vapor discharged from the dispersion component 310 and the concentration component 320 and transport the condensed water to the dilution container 340, and the dilution container 340 is connected with a water supply pipe 380, which is used to replenish fresh water.

[0030] It should be understood that the settling tank 100 is settling natural seawater, so that the silt and other solid debris in the seawater are settled at the bottom of the settling tank 100, ensuring the cleanliness of the seawater entering the sedimentation and filtration device 200 and reducing the operating load of the sedimentation and filtration device 200. The upwardly inclined settling plate 220 and the box body 210 define a space shaped like a water receiving bucket, so that the seawater transported from the sedimentation tank can be received by the settling plate 220. Under the action of gravity, the silt in the seawater will be settled at the bottom of the water receiving bucket, and the overflow The discharged seawater may be mixed with residual silt and flow to the top of the retention filter plate 230 of the next layer, and the downwardly inclined structure of the retention filter plate 230 allows the seawater to be smoothly retained, while the silt is intercepted by the surface of the retention filter plate 230 due to the effect of gravity, and the retention filter plate 230 has a filtering function, which can ensure the efficiency and speed of seawater purification. The settling plate 220 and the retention filter plate 230 cooperate to further improve the purity of the seawater, realize the purification of silt in the seawater, and reduce the total amount of seawater in the sedimentation and filtration device. The sedimentation and filtration device 200 performs sedimentation and retention filtration alternately, so that the seawater is further purified and filtered, so as to avoid the solid impurities in the seawater from damaging the mangrove seedlings, and to avoid the accumulation of sand in the planting pit, and also to avoid the blockage of sand in the dispersion component 310. The salinity adjustment device 300 adopts a combination of dispersed heating and evaporation concentration, so that the seawater can be evaporated as much as possible to achieve the purpose of increasing the salinity, and the evaporated water vapor can be condensed and fed back to the natural seawater to dilute the natural seawater. The salinity adjustment is achieved by this device. The salinity of the seawater in the first outlet 351 line increases, and the salinity of the seawater in the third outlet 353 line decreases, so as to achieve dynamic adjustment. The circulating pump 400 and the water supply pipe 380 are set to play an additional role in promoting. When the salinity adjustment efficiency is too low, the seawater in each line is incrementally adjusted by the peripheral circulating pump 400 and the water supply pipe 380, so as to ensure that the salinity of the seawater finally output is in line with expectations, ensure that the salinity training process of the mangrove seedlings proceeds smoothly, and reduce the trouble of adding salt and water manually. It should be noted that the salinity in seawater is not simply the concentration of sodium chloride, but also contains other substances. If you want to simulate the salinity and substances of seawater, simply adding sodium chloride will not achieve a better effect. Therefore, in the process of adding salt to adjust the concentration, it is also necessary to proportion various types of salts, and then add salt to adjust the concentration. This process wastes manpower and reduces efficiency. The present invention uses natural seawater to adjust the salinity by evaporation and condensation, which is much more convenient than adding salt.

[0031] It should be noted that the inclination angle of the sedimentation plate 220 is greater than the inclination angle of the retention filter plate 230. This is to allow the space formed by the sedimentation plate 220 and the box body 210 to have a larger storage capacity, while the retention filter plate 230 is relatively flat. This is to prevent mud and sand from flowing away with the seawater, and also to reduce the flow speed of seawater and increase the filtration time of seawater.

[0032] In some embodiments, the number of sedimentation plates 220 is greater than the number of retention filter plates 230, the uppermost sedimentation plate 220 is located above the uppermost retention filter plate 230, and the lowermost sedimentation plate 220 is located below the lowermost retention filter plate 230. This arrangement allows the seawater to first settle on the sedimentation plates 220 and finally leave from the sedimentation plates 220, thereby ensuring the purity of the seawater and improving the efficiency of seawater purification.

[0033] In some embodiments, the salinity regulating device also includes a circulation pump 400 and a first salinity detector 390. One end of the circulation pump 400 is connected to the pipeline between the concentrating component 320 and the first valve 361, and the other end of the circulation pump 400 is connected to the pipeline between the fourth valve 364 and the dispersion component 310. The first salinity detector 390 is arranged on the pipeline between the concentrating component 320 and the first valve 361. A sixth valve 366 is arranged on the pipeline where the circulation pump 400 is located. The circulation pump 400 is used to pump the seawater discharged from the concentrating component 320 to the dispersion component 310. The arranged circulation pump 400 and the first salinity detector 390 cooperate to adjust the salinity, so as to facilitate the output of seawater according to the salinity requirements.

[0034] Reference Figure 1 and Figure 3 The dispersion component 310 includes a sealed shell 311, a dispersion net bed 312 and a distributor 313. The dispersion net bed 312 and the distributor 313 are both arranged in the sealed shell 311. The distributor 313 is arranged at the upper end of the dispersion net bed 312. The first outlet 351 is connected to the water inlet of the distributor 313. The water outlet of the sealed shell 311 is connected to the concentration component 320. The distributor 313 is used to output a water curtain to the dispersion net bed 312. The dispersion net bed 312 is used to disperse and output seawater to the concentration component 320. The sealed shell 311 is connected to the condenser 330 through a steam pipe. The dispersion component 310 has a simple structure and adopts a combination of the distributor 313 and the dispersion net bed 312 to improve the seawater dispersion efficiency. It should be understood that the sealed shell 311 is sealed to prevent water vapor from escaping. The dispersed mesh bed 312 is set to disperse the seawater, so that the distance traveled by the seawater in the dispersed mesh bed 312 is longer, and the seawater can be fully heated by the sunlight in the dispersed mesh bed 312. A part of the seawater will also evaporate in the sealed shell 311, but it is mainly used to heat the seawater. The specific surface area of ​​the dispersed mesh bed 312 increases the contact area between the seawater and the sunlight, which can improve the evaporation efficiency and the heating efficiency. The so-called dispersed mesh bed 312 can also be a plate with a porous structure. The distance that the seawater flows through it is much longer than that of directly flowing down. The dispersed mesh bed 312 can also be a plate or block with a network structure inside.

[0035] Reference Figure 3In some embodiments, the distributor 313 includes a water receiving trough 313a and a pipe head 313b, one end of the pipe head 313b is connected to the first outlet 351, and the other end of the pipe head 313b is connected to the water receiving trough 313a. The pipe head 313b is arranged in the middle of the water receiving trough 313a, and the inner wall at the intersection of the pipe head 313b and the water receiving trough 313a is provided with a guide slope 313c. The length direction of the water receiving trough 313a extends along the width direction of the dispersion net bed 312. The water receiving trough 313a is used to distribute seawater along the width direction of the dispersion net bed 312 so that the overflowed seawater forms a water curtain. The distributor 313 realizes the rapid lateral distribution of the water column in the water receiving trough 313a through the guide slope 313c, which is convenient for forming a stable water curtain in the later stage.

[0036] In some embodiments, the dispersion mesh bed 312 includes a stainless steel mesh bed, a plastic mesh bed, or a carbon fiber mesh bed. The dispersion mesh bed 312 is made of these materials to prevent seawater corrosion.

[0037] Reference Figure 1 and Figure 2 In some embodiments, the concentration component 320 includes an evaporation plate 321, a collection cover 322 and a fan 323. The evaporation plate 321 is provided with an evaporation channel 324 arranged in an S shape. One end of the evaporation channel 324 is connected to the water outlet of the sealing shell 311, and the other end of the evaporation channel 324 is connected to the first valve 361. The evaporation plate 321 is arranged in the collection cover 322, and the collection cover 322 seals the evaporation plate 321. The collection cover 322 is connected to the condenser 330 through a steam pipe. The fan 323 is arranged on the steam pipe, and the fan 323 is used to draw water vapor to the condenser 330. The structure of the concentration component 320 is simple and suitable for evaporating seawater. The evaporation channel 324 arranged in an S shape can increase the travel distance of seawater, increase the evaporation time of seawater, and increase the upper limit of the concentration of seawater salinity. It should be noted that the collecting hood 322 also seals the evaporation plate 321, and the fan 323 plays a role in assisting the flow of water vapor. The so-called sealing does not mean complete sealing, but loading. However, air circulation is still required to make the steam flow. An evaporation channel 324 is arranged on the surface of the evaporation plate 321, so that the seawater is evaporated while flowing. The evaporation plate 321 can spread the seawater thereon, increase the contact area between the seawater and the space, and increase the evaporation efficiency. The fan 323 can also promote evaporation.

[0038] Reference Figure 1 , Figure 2 and Figure 4In some embodiments, the condenser 330 includes an insulated box 331 and a metal plate 332. The metal plate 332 is provided with a plurality of metal plates 332, which are obliquely arranged in the insulated box 331. One end of the insulated box 331 is connected to the steam pipe, and the other end of the insulated box 331 is connected to the dilution container 340. The condenser 330 uses the metal plate 332 for condensation, which reduces power input and saves energy and reduces consumption. It can be understood that the metal plate 332 is made of metals with high thermal conductivity such as copper and aluminum, or steel plates, ceramic plates, etc., wherein the metal plate 332 in the condenser 330 can also be replaced with a condenser for air conditioning, and of course, other equipment of the air conditioner must be matched. A dehumidifier can also be used to absorb water vapor in the insulated box 331, and calcium chloride can also be filled in the insulated box 331 to absorb water vapor in the insulated box 331, thereby forming a hydrate of calcium chloride. When making seawater with lower salinity, calcium chloride can also be supplemented to provide benefits for mangrove production and soil improvement. For details, refer to Figure 4 A sealing cover 331a is hingedly provided on the top of the thermal insulation box 331, and a plurality of sockets 331b are provided inside the thermal insulation box 331. Each socket 331b is used to plug in a stuffing pack 331c. The outer shell of the stuffing pack 331c is loaded with calcium chloride particles or calcium chloride powder. The outer shell of the stuffing pack 331c is provided with air holes, and the air holes can allow water vapor to pass through. When water vapor passes through the stuffing pack 331c, the calcium chloride particles or calcium chloride powder can absorb water.

[0039] In some embodiments, the sealed shell 311 and the collecting cover 322 are both set to be transparent, and the sides of the sealed shell 311 and the collecting cover 322 are mounted with heat absorbing sheets, which can better absorb the heat of the sun to heat the seawater. It can be understood that the heat absorbing sheets include metal sheets or metal sheets coated with heat absorbing paint. The heat absorbing sheets are mainly used to increase the temperature of the seawater in the sealed shell 311 and the collecting cover 322. In addition, electric heating equipment can also be installed in the sealed shell 311 and the collecting cover 322 to heat and evaporate the seawater by electric heating. The heated seawater needs to be cooled before irrigation.

[0040] It should be noted that a stirring device 341 is provided in the dilution container 340, and the stirring device 341 is used to stir the seawater in the dilution container 340. The water inlet of the dilution container 340 is higher than the water outlet of the dilution container 340. The stirring device 341 is provided to improve the dilution efficiency. The stirring device 341 includes a motor and a stirring shaft. The stirring shaft is provided in the dilution container 340, and the motor is connected to the stirring shaft through transmission, and the motor is used to drive the stirring shaft to stir and dilute.

[0041] In some embodiments, a plug-in port 211 is provided in the box body 210 , and the settling plate 220 and the retention filter plate 230 can be detachably plugged into the plug-in port 211 , so that the settling plate 220 is convenient to disassemble and assemble, and easy to replace.

[0042] It is understandable that a first salinity detector 390 is provided on the pipeline between the first valve 361 and the third valve 363, and the salinity is obtained through the salinity detector to provide guidance for adjusting the salinity.

[0043] The method for raising mangrove seedlings using natural seawater to temper salinity according to an embodiment of the present invention applies the system of the above embodiment and includes the following steps: Water is stored, a sedimentation tank 100 is set up, seawater is introduced into the sedimentation tank 100, and the seawater is allowed to stand in the sedimentation tank 100 for a preset time, so that the silt in the seawater is settled at the bottom of the sedimentation tank 100; Sedimentation and filtration: Open the drain pipe 110 to discharge the seawater in the sedimentation tank 100 onto the first settling plate 220 in the box 210. The settling plate 220 settles the silt in the seawater and overflows the seawater onto the first retention filter plate 230. The first retention filter plate 230 retains part of the silt in the seawater and flows the other part of the silt onto the second settling plate 220. At the same time, the first retention filter plate 230 filters the seawater, and the filtered part of the seawater flows onto the second retention filter plate 230. The other part of the filtered seawater and the unfiltered seawater both flow onto the second settling plate 220, and so on until the bottom settling plate 220 overflows the seawater to the water outlet of the box 210. Salinity adjustment, opening the second outlet 352, closing the first outlet 351 and the third outlet 353, and supplying seawater to the mangrove seedlings from the second outlet 352 through the output pipe 500; Alternatively, the first outlet 351 is opened, the second outlet 352 and the third outlet 353 are closed, and the seawater filtered by the filtration device 200 is passed into the dispersion component 310 through the first outlet 351, and the seawater is dispersed by the dispersion component 310. The seawater dispersed by the dispersion component 310 is heated and preliminarily evaporated, and then the seawater heated by the dispersion component 310 is discharged to the concentration component 320, and the heated seawater is evaporated and concentrated in the concentration component 320 for a second time, and then the salinity value is obtained by detection and it is determined whether it exceeds the first preset salinity value. If it exceeds, the first valve 361 is opened and the seawater is supplied to the mangrove seedlings through the output pipe 500; if it does not exceed, the first valve 361 is kept closed and the circulation pump 400 is turned on to circulate the seawater and evaporate until the salinity value of the seawater reaches the preset salinity value, and the water vapor generated by the seawater in the dispersion component 310 and the concentration component 320 enters the condenser 330 for condensation, and the condensed fresh water enters the dilution container 340 for storage; Alternatively, the third outlet 353 is opened, the first outlet 351 and the second outlet 352 are closed, the seawater flows into the dilution container 340 and mixes with the stored condensed water, and then the salinity value is obtained by detection and it is determined whether it is lower than the second preset salinity value. If it is lower, the third valve 363 is opened and the seawater is supplied to the mangrove seedlings through the output pipe 500; if it is not lower, the third valve 363 is kept closed and the water supply pipe 380 is opened to add fresh water to the dilution container 340 to dilute the seawater until the salinity value is lower than the second preset salinity value; it can be understood that a second salinity detector 391 is provided on the pipeline between the third valve 363 and the dilution container 340, and the second salinity detector 391 is used to detect the seawater discharged from the third valve 363; Transplanting: transplant the mangrove seedlings that have been cultivated through irrigation.

[0044] It is understandable that the irrigation of mangrove seedlings is not continuous, but it takes a while to irrigate again after one irrigation. Therefore, after the high-salinity seawater irrigation, the next irrigation needs to be separated by a period of time. For example, the first time the seawater with a higher salinity than the natural seawater is used for irrigation, if the second time the seawater with a lower salinity than the natural seawater is used for irrigation, it is diluted in the dilution container 340 before irrigation. Just in the process of irrigating with high-salinity seawater, fresh water is accumulated in the dilution container 340 to prepare for the subsequent dilution process, that is, preparation time is left for dilution, ensuring that the mangrove seedlings can get the target seawater every time they are irrigated.

[0045] In addition, the sedimentation tank 100 is excavated according to needs or directly spliced ​​out by prefabricated panels, and the excavated sedimentation tank needs to be reinforced on the inner wall.

[0046] At least the following beneficial effects are achieved: the mangrove seedlings cultivated by the above method are trained in salinity, and the mangrove seedlings have adapted to the changes in salinity during the cultivation process, thereby ensuring that they can adapt to the salinity changes of seawater in the natural environment after transplanting, thereby improving the survival rate of the mangrove seedlings.

[0047] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A system for salinity training of mangrove seedlings using natural seawater, characterized in that: include: A sedimentation tank (100) for settling seawater; The sedimentation and filtration device (200) comprises a housing (210), a plurality of sedimentation plates (220) and a plurality of retention filter plates (230), wherein the water inlet end of the housing (210) is connected to the sedimentation tank (100), the plurality of sedimentation plates (220) are extended to connect to the right side wall, the front side wall and the rear side wall of the housing (210), the plurality of retention filter plates (230) are extended to connect to the left side wall, the front side wall and the rear side wall of the housing (210), the sedimentation plates (220) and the retention filter plates (230) are extended to connect to the left side wall, the front side wall and the rear side wall of the housing (210), and the sedimentation plates (220) and the retention filter plates (230) are connected to the left side wall, the front side wall and the rear side wall of the housing (210). ) are alternately spaced in the up-down direction, the settling plates (220) are arranged obliquely upward and extend to directly above the retention filter plates (230) of the next layer, the retention filter plates (230) are arranged obliquely downward and extend to directly above the settling plates (220) of the next layer, the settling plates (220) are used to receive and overflow seawater and settle silt, and the retention filter plates (230) are used to filter seawater and retain part of the silt and allow the other part of the silt to flow to the settling plates (220) of the next layer; A salinity regulating device (300) comprises a dispersion component (310), a concentration component (320), a condenser (330) and a dilution container (340); a water outlet end of the housing (210) is connected to a four-way pipe (350); a first outlet (351) in the four-way pipe (350) is connected to the dispersion component (310) and the concentration component (320) in sequence; a water outlet of the concentration component (320) is connected to a first valve (361); and a second outlet (352) in the four-way pipe (350) is connected to a second valve (362). The third outlet (353) in the four-way pipe (350) is connected to the water inlet of the dilution container (340), the water outlet of the dilution container (340) is connected to the third valve (363), the dispersion component (310) and the concentration component (320) are both connected to the dilution container (340) through the condenser (330), the first valve (361), the second valve (362) and the third valve (363) are gathered and connected to the output pipe (500), and the output pipe (500) is used to supply seawater to the mangrove seedlings.

2. The system for using natural seawater to provide salinity training for mangrove seedlings according to claim 1 is characterized in that: The number of the settling plates (220) is greater than the number of the retention filter plates (230), the uppermost settling plate (220) is located above the uppermost retention filter plate (230), and the lowermost settling plate (220) is located below the lowermost retention filter plate (230).

3. The system for using natural seawater to provide salinity training for mangrove seedlings according to claim 2 is characterized in that: The invention also comprises a circulation pump (400) and a first salinity detector (390); one end of the circulation pump (400) is connected to the pipeline between the concentration component (320) and the first valve (361); the other end of the circulation pump (400) is connected to the pipeline between the first outlet (351) and the dispersion component (310); the first salinity detector (390) is arranged on the pipeline between the concentration component (320) and the first valve (361); a sixth valve (366) is arranged on the pipeline where the circulation pump (400) is located; and the circulation pump (400) is used to pump the seawater discharged from the concentration component (320) to the dispersion component (310).

4. The system for using natural seawater to provide salinity training for mangrove seedlings according to claim 1 is characterized in that: The dispersion component (310) comprises a dispersion net bed (312), a sealed shell (311) and a distributor (313); the dispersion net bed (312) and the distributor (313) are both arranged in the sealed shell (311); the distributor (313) is arranged at the upper end of the dispersion net bed (312); the first outlet (351) is connected to a water inlet of the distributor (313); the water outlet of the sealed shell (311) is connected to the concentration component (320); the distributor (313) is used to output a water curtain to the dispersion net bed (312); the dispersion net bed (312) is used to disperse seawater and output it to the concentration component (320); and the sealed shell (311) is connected to the condenser (330) through a steam pipeline.

5. The system for using natural seawater to provide salinity training to mangrove seedlings according to claim 4 is characterized in that: The uniform distributor (313) comprises a water receiving trough (313a) and a pipe head (313b); one end of the pipe head (313b) is connected to the first outlet (351); the other end of the pipe head (313b) is connected to the water receiving trough (313a); the pipe head (313b) is arranged in the middle of the water receiving trough (313a); a flow guide slope (313c) is arranged on the inner wall of the intersection of the pipe head (313b) and the water receiving trough (313a); the length direction of the water receiving trough (313a) extends along the width direction of the dispersion net bed (312); the water receiving trough (313a) is used to distribute seawater along the width direction of the dispersion net bed (312) so that the overflowed seawater forms a water curtain.

6. The system for using natural seawater to provide salinity training to mangrove seedlings according to claim 4 or 5, characterized in that: The concentration component (320) comprises an evaporation plate (321), a collection hood (322) and a fan (323); an evaporation channel (324) arranged in an S shape is provided on the evaporation plate (321); one end of the evaporation channel (324) is connected to a water outlet of the sealed housing (311); the other end of the evaporation channel (324) is connected to the first valve (361); the evaporation plate (321) is arranged in the collection hood (322); the collection hood (322) seals the evaporation plate (321); the collection hood (322) is connected to the condenser (330) via a steam pipeline; the fan (323) is arranged on the steam pipeline; and the fan (323) is used to draw water vapor to the condenser (330).

7. The system for using natural seawater to provide salinity training to mangrove seedlings according to claim 6 is characterized in that: The condenser (330) comprises a thermal insulation box (331) and a metal plate (332), wherein a plurality of the metal plates (332) are provided, and the plurality of the metal plates (332) are obliquely arranged in the thermal insulation box (331), one end of the thermal insulation box (331) is connected to the steam pipeline, and the other end of the thermal insulation box (331) is connected to the dilution container (340).

8. The system for using natural seawater to provide salinity training to mangrove seedlings according to claim 1, characterized in that: The dilution container (340) is provided with a stirring device (341), the stirring device (341) being used to stir the seawater in the dilution container (340), and the water inlet of the dilution container (340) is higher than the water outlet of the dilution container (340).

9. The system for using natural seawater to provide salinity training to mangrove seedlings according to claim 1, characterized in that: The box body (210) is provided with an insertion port (211), and the sedimentation plate (220) and the retention filter plate (230) can both be detachably inserted into the insertion port (211).

10. A method for raising mangrove seedlings using natural seawater to provide salinity training, characterized in that: The system for using natural seawater to provide salinity training to mangrove seedlings as claimed in claim 3 comprises the following steps: Water is stored, a sedimentation tank (100) is provided, seawater is introduced into the sedimentation tank (100), and the seawater is allowed to stand in the sedimentation tank (100) for a preset time, so that the silt in the seawater is settled at the bottom of the sedimentation tank (100); Sedimentation and filtration, the seawater in the sedimentation tank (100) is discharged onto the first settling plate (220) in the housing (210), the settling plate (220) settles the sediment in the seawater and overflows the seawater onto the first retention filter plate (230), the first retention filter plate (230) retains part of the sediment in the seawater and causes the other part of the sediment to flow onto the second settling plate (220), at the same time, the first retention filter plate (230) filters the seawater, the filtered part of the seawater flows onto the second retention filter plate (230), the other part of the filtered seawater and the unfiltered seawater both flow onto the second settling plate (220), and so on and so forth until the bottom settling plate (220) overflows the seawater to the water outlet of the housing (210); salinity adjustment, opening the second outlet (352), closing the first outlet (351) and the third outlet (353), and supplying seawater from the second outlet (352) to the mangrove seedlings through the output pipe (500); Alternatively, the first outlet (351) is opened, the second outlet (352) and the third outlet (353) are closed, the seawater filtered by the sedimentation and filtration device (200) is passed through the first outlet (351) to the dispersion component (310), the seawater is dispersed by the dispersion component (310), the seawater dispersed by the dispersion component (310) is heated and preliminarily evaporated, and then the seawater heated by the dispersion component (310) is discharged to the concentration component (320), the heated seawater is evaporated and concentrated for a second time in the concentration component (320), and then the salinity value is obtained by detection and it is determined whether it exceeds a first preset salinity value, and if so, the first valve (361) is opened and seawater is supplied to the mangrove seedlings through the output pipe (500); If it does not exceed, the first valve (361) is kept closed and the circulation pump (400) is turned on to allow the seawater to circulate and evaporate until the salinity of the seawater reaches a preset salinity value, and the water vapor generated by the seawater in the dispersion component (310) and the concentration component (320) enters the condenser (330) for condensation, and the condensed fresh water enters the dilution container (340) for storage; Alternatively, the third outlet (353) is opened, the first outlet (351) and the second outlet (352) are closed, the seawater flows into the dilution container (340) and is mixed with the stored condensed water, and then the salinity value is obtained by detection and it is determined whether it is lower than a second preset salinity value. If it is lower, the third valve (363) is opened and seawater is supplied to the mangrove seedlings through the output pipe (500); if it is not lower, the third valve (363) is kept closed and fresh water is added to the dilution container (340) to dilute the seawater until the salinity value is lower than the second preset salinity value; Transplanting: transplant the mangrove seedlings that have been cultivated through irrigation.

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