Seawater desalination salt-making device

Abstract

The utility model provides a seawater desalination salt-making device, and relates to the technical field of seawater desalination. Comprising a treatment frame, a plurality of water guide strips are arranged at the inner bottom of the treatment frame, and a fresh water collecting plate is fixed to the inner center of the treatment frame. Under the irradiation of sunlight, the temperature in the treatment frame is increased, so that the temperature of seawater is increased, meanwhile, the seawater is boiled in a vacuum environment, a large amount of water vapor is generated, and the water vapor and fresh water are guided into a primary collection tank through a first fresh water discharge pipe and a steam discharge pipe; the high-concentration brine is guided into the secondary collecting tank through the first brine discharging pipe, and the desalinated brine is directly conveyed to the salt manufacturing process through the secondary collecting tank, so that the situation that the marine ecology is polluted by high-salinity wastewater discharge is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to sea water desalination technical field especially relates to a sea water desalination salt making device. BACKGROUND

[0002] Sea water desalination and salt industry production are important technical directions to solve fresh water resource shortage and industrial salt demand. With the aggravation of global water resource crisis and the rapid development of salt chemical industry, efficient and energy-saving sea water comprehensive utilization technology becomes a research hotspot. Traditional sea water desalination and salt making process usually operates independently, for example, desalination sea water through reverse osmosis, distillation or electrodialysis technology, and salt is recovered through solar evaporation or mechanical evaporation crystallization.

[0003] At present, the means for sea water desalination include distillation method, reverse osmosis method and electrodialysis method, but such processing methods have the following technical problems:

[0004] The core problem of reverse osmosis method is that the high-pressure pump has high energy consumption and high cost consumption, and the direct discharge of concentrated brine can easily cause marine ecological pollution;

[0005] The distillation method uses waste heat to desalinate sea water, but the equipment is bulky and has high maintenance cost, and it is difficult to miniaturize application;

[0006] The electrodialysis method needs continuous power supply to maintain the electric field, thereby increasing energy consumption, at the same time, the ion exchange membrane is easily polluted (such as the attachment of organic matter, colloid or precipitate), which leads to efficiency reduction, frequent cleaning or membrane replacement, and the durability problem of the membrane in long-term operation leads to increased maintenance cost.

[0007] Therefore, the utility model provides a sea water desalination salt making device. UTILITY MODEL CONTENT

[0008] The utility model aims at solving the shortcomings in the prior art, and provides a sea water desalination salt making device.

[0009] In order to achieve the above object, the utility model adopts the following technical scheme: a sea water desalination salt making device, comprising:

[0010] A processing frame is provided with a plurality of water guide strips in the inner bottom, a fresh water collecting plate is fixed at the inner center of the processing frame, and the side surface of the processing frame is communicated with:

[0011] A water inlet pipe for inputting sea water;

[0012] A first fresh water discharge pipe connected with the fresh water collecting plate;

[0013] A steam discharge pipe for discharging steam;

[0014] A first brine discharge pipe for discharging high-concentration brine;

[0015] A primary collection tank, to which the steam discharge pipe and the first fresh water discharge pipe are connected, and on which a second fresh water discharge pipe is provided;

[0016] A secondary collection tank, to which the first brine discharge pipe is connected, and on which a second brine discharge pipe is provided;

[0017] The second fresh water discharge pipe and the second brine discharge pipe are each provided with a pump at the end thereof.

[0018] As a preferred embodiment, a one-way valve is provided on the second fresh water discharge pipe and the second brine discharge pipe.

[0019] The above further scheme has the technical effect of effectively preventing air backflow by providing a one-way valve on the second fresh water discharge pipe and the second brine discharge pipe.

[0020] As a preferred embodiment, a flow valve is provided at the water inlet end of the water inlet pipe.

[0021] The above further scheme has the technical effect of controlling the speed and flow rate of the seawater flowing into the treatment frame through the flow valve (when the brine concentration inside the treatment frame is high, the flow rate of the seawater is increased through the flow valve, and when the brine concentration inside the treatment frame is low, the flow rate of the seawater is reduced through the flow valve), thereby ensuring the salinity of the brine.

[0022] As a preferred embodiment, a water level valve is provided inside the primary collection tank and the secondary collection tank.

[0023] The above further scheme has the technical effect of triggering the pump to start when the water level in the primary collection tank and the secondary collection tank reaches the upper limit, thereby discharging the liquid inside the primary collection tank and the secondary collection tank through the second fresh water discharge pipe and the second brine discharge pipe.

[0024] As a preferred embodiment, a salinity sensor is provided at the connection between the first brine discharge pipe and the treatment frame.

[0025] The above further scheme has the technical effect of enabling real-time monitoring of the salinity of the brine through the provision of the salinity sensor, thereby controlling the flow rate of the seawater through the cooperation of the flow valve.

[0026] As a preferred embodiment, a beveled opening is provided at the top of the treatment frame, and a top cover in the shape of an inverted triangle is provided on the beveled opening.

[0027] The above further scheme has the technical effect of facilitating the dripping of the condensed steam into the fresh water collection plate.

[0028] As a preferred embodiment, the material of the top cover is tempered glass, and the bottom center of the top cover is above the fresh water collection plate.

[0029] The technical effect of the above further scheme is that the inside temperature is kept high through the light transmission of the tempered glass, the water vapor is attached to the top of the top cover through rising, then slides to the bottom center of the top cover through the inverted triangular structure of the top cover, and finally drops to the fresh water collection plate to complete the preliminary fresh water collection.

[0030] As a preferred embodiment, the primary collection tank and the secondary collection tank are connected through a communication pipe.

[0031] The technical effect of the above further scheme is that the internal pressure balance is ensured to avoid abnormal flow caused by siphon effect.

[0032] As a preferred embodiment, the plurality of water guide strips are fixed to the inner bottom of the treatment frame in a staggered arrangement.

[0033] The technical effect of the above further scheme is that the flow path of seawater is prolonged to ensure the evaporation efficiency.

[0034] As a preferred embodiment, a section of the first fresh water discharge pipe, the steam discharge pipe and the first brine discharge pipe is placed inside the water inlet pipe and extends out of the water inlet pipe.

[0035] The technical effect of the above further scheme is that by placing a section of the first fresh water discharge pipe, the steam discharge pipe and the first brine discharge pipe inside the water inlet pipe, the water vapor, the high-concentration brine and the fresh water can be further cooled by the undesalinated seawater (normal temperature / low temperature), so as to condense the water vapor, ensure the condensation effect, and cool the fresh water and the brine.

[0036] Compared with the prior art, the advantages and positive effects of the present application are that,

[0037] Under the irradiation of sunlight, the temperature inside the treatment frame rises, so that the temperature of the seawater rises, and the seawater boils under vacuum environment to generate a large amount of water vapor. The water vapor and the fresh water are guided out of the first fresh water discharge pipe and the steam discharge pipe into the primary collection tank, the high-concentration brine is guided out of the first brine discharge pipe into the secondary collection tank, and the desalinated brine (high concentration) is directly delivered to the salt making process through the secondary collection tank, avoiding high-salt wastewater discharge to pollute the marine ecology. Through the modular design, the structure of the present application is miniaturized, the land occupation is small, the energy consumption is low, and the overall service life is increased without frequent maintenance. The first fresh water discharge pipe and the steam discharge pipe are embedded in the water inlet pipe to use the undesalinated seawater for natural cooling and reduce additional condensation energy consumption. Attached Figure Description

[0038] Figure 1 A three-dimensional structural diagram of a seawater desalination and salt production device provided by this utility model;

[0039] Figure 2 A schematic diagram of the internal structure of the processing frame of a seawater desalination and salt production device provided by this utility model;

[0040] Figure 3 A schematic diagram of the top cover structure of a seawater desalination and salt production device provided by this utility model;

[0041] Figure 4 A schematic diagram showing the structural connection of an inlet pipe, a drain pipe, a steam drain pipe, and a brine drain pipe in a seawater desalination and salt production device provided by this utility model;

[0042] Figure 5 A schematic diagram of the water flow direction inside the processing frame of a seawater desalination and salt production device provided by this utility model.

[0043] Legend:

[0044] 1. Processing frame; 101. Angled opening; 102. Water guide strip; 103. Top cover;

[0045] 2. Freshwater collection plate; 3. Inlet pipe; 31. Flow valve; 4. First freshwater drain pipe; 5. Steam drain pipe;

[0046] 6. First brine drain pipe; 61. Salinity sensor; 7. Primary collection tank; 8. Secondary collection tank; 9. Second freshwater drain pipe; 10. Second brine drain pipe; 11. Check valve; 12. Pump; 13. Connecting pipe; 14. Water level valve. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] refer to Figure 1 , Figure 2 and Figure 4As shown, a seawater desalination and salt making device includes a processing frame 1, the processing frame 1 has a cuboid structure with a volume of 1m*2m, the bottom of the frame is coated with a nano heat absorption coating (absorption rate > 98%), which ensures the heat absorption and evaporation efficiency, and a plurality of water guide strips 102 are installed on the inner bottom of the processing frame 1, which prolongs the flow path of seawater and ensures the evaporation efficiency, thereby ensuring the purity of desalination.

[0049] The side surface of the processing frame 1 is provided with the following interfaces:

[0050] Reference Figure 2 As shown, a seawater inlet, a water inlet pipe 3 is installed in the seawater inlet through a water pipe joint, seawater is input into the inside of the processing frame 1 through the water inlet pipe 3;

[0051] A fresh water outlet, the fresh water outlet is connected with the fresh water collecting plate 2, and a first fresh water outlet pipe 4 is installed in the fresh water outlet through a water pipe joint, which is used to discharge the fresh water collected in the fresh water collecting plate 2;

[0052] Reference Figures 1-3 As shown, the top of the processing frame 1 is provided with a bevel 101 on both sides, and a top cover 103 in inverted triangular structure is sealingly installed on the bevel 101, which is tempered glass with an inclination angle of 3°-5°, the bottom center of the top cover 103 is opposite to the top of the fresh water collecting plate 2, which is convenient for the condensed steam to drop into the fresh water collecting plate 2, the water vapor is attached to the top of the top cover 103 by rising, then slides down to the bottom center of the top cover 103 through the inverted triangular structure of the top cover 103, and finally the water droplets drop into the fresh water collecting plate 2 to complete the preliminary fresh water collection.

[0053] A steam outlet, a steam outlet pipe 5 is installed in the steam outlet through a water pipe joint, which is used to guide out the water vapor in the processing frame 1 after desalination treatment;

[0054] A brine outlet, a first brine outlet pipe 6 is installed in the brine outlet through a water pipe joint, which is used to discharge the brine in the processing frame 1 after desalination treatment.

[0055] Among them, reference Figure 2 As shown, the horizontal position of the brine outlet is lower than that of the seawater inlet, which ensures the flow discharge of the brine in the processing frame 1, the horizontal position of the steam outlet is higher than that of the brine outlet, which prevents the brine from entering the steam outlet, and the diameter of the steam outlet is greater than that of the fresh water outlet and the brine outlet, which ensures the flow efficiency of the steam.

[0056] Reference Figure 4 As shown, it also includes a primary collection tank 7 and a secondary collection tank 8, the installation position of the primary collection tank 7 and the secondary collection tank 8 is lower than the water level position of the processing frame 1, the processing frame 1 is placed in a high place with more sunlight (such as roof, hill flat ground or by increasing the height of the lifting etc.), the primary collection tank 7 is installed in a cool place to ensure the condensation effect.

[0057] The end of the first fresh water discharge pipe 4 and the steam discharge pipe 5 is connected with the primary collection tank 7, the fresh water collected in the fresh water collection plate 2 and the water vapor in the processing frame 1 are introduced into the inside of the primary collection tank 7 through the first fresh water discharge pipe 4 and the steam discharge pipe 5, the water vapor is attached to the inside of the primary collection tank 7 when introduced into the primary collection tank 7, becomes condensed water through natural cooling, and is temporarily stored in the inside of the primary collection tank 7.

[0058] The end of the first brine discharge pipe 6 is connected with the secondary collection tank 8, the high concentration brine after desalination treatment in the processing frame 1 is introduced into the inside of the secondary collection tank 8 through the first brine discharge pipe 6 for temporary storage, facilitating salt production in the later stage.

[0059] The brine (high concentration) after desalination treatment is directly delivered to the salt production process through the secondary collection tank 8, realizing 100% recovery of salt resources and avoiding high-salt wastewater discharge to pollute the marine ecology.

[0060] The second fresh water discharge pipe 9 and the second brine discharge pipe 10 for leading out the condensed water and the high concentration brine in the inside of the primary collection tank 7 and the secondary collection tank 8 are arranged on the primary collection tank 7 and the secondary collection tank 8, and the end of the second fresh water discharge pipe 9 and the second brine discharge pipe 10 is provided with a pump 12 (water and gas dual-purpose pump), the condensed water and the high concentration brine are extracted through the pump 12, and the whole is ensured to be in a vacuum environment when the component is in a state without fluid.

[0061] Reference Figures 1-3 As shown, the top of the processing frame 1 is provided with beveled openings 101 on both sides, the beveled openings 101 are provided with inverted triangular top covers 103 sealed by soft rubber, tempered glass with an inclination of 3°-5°, the bottom center of the top cover 103 is opposite to the top of the fresh water collection plate 2, facilitating the condensed steam to drop into the fresh water collection plate 2, the water vapor is attached to the top of the top cover 103 through rising, then slides down to the bottom center of the top cover 103 through the inverted triangular top cover 103, and finally the water droplets drop into the fresh water collection plate 2, completing the preliminary fresh water collection.

[0062] It is worth pointing out that: the air in the inside of the processing frame 1, the first fresh water discharge pipe 4, the steam discharge pipe 5, the first brine discharge pipe 6, the primary collection tank 7, the secondary collection tank 8, the second fresh water discharge pipe 9 and the second brine discharge pipe 10 is extracted through the pump 12, so that the component is in a vacuum state, a vacuum sensor (pressure sensor) can be arranged in the inside of the processing frame 1, so that the vacuum state in the inside can be monitored, and then seawater is injected into the inside of the processing frame 1 through the water inlet pipe 3.

[0063] The above is: by starting the pump 12 draws out the processing frame 1, the first fresh water discharge pipe 4, the steam discharge pipe 5, the first brine discharge pipe 6, the primary collection tank 7, the secondary collection tank 8, the second fresh water discharge pipe 9 and the second brine discharge pipe 10 inside the air, so that the inside is in a vacuum state, the seawater is injected into the inside of the processing frame 1 through the water inlet pipe 3, the seawater is made to flow slowly through the setting of the plurality of water guide strips 102, the inside temperature is made to rise under the irradiation of sunlight, so that the seawater temperature rises, and the seawater boils under the vacuum environment, the combination of solar evaporation and vacuum boiling technology, and the use of nano heat absorption coating (absorption rate > 98%) and vacuum environment to reduce the boiling point of seawater (about 40-60℃ can boil), reduce the heat consumption, produce a large amount of water vapor, part of the water vapor rises and adheres to the top of the processing frame 1, forms water droplets after natural condensation, and falls into the fresh water collection plate 2, then is discharged to the primary collection tank 7 through the first fresh water discharge pipe 4, another part of the water vapor is discharged to the primary collection tank 7 through the steam discharge pipe 5 and adheres to the inner wall of the primary collection tank 7, forms water droplets after natural condensation and falls into the primary collection tank 7, the salt content in the desalinated seawater increases, forming high-concentration brine, which is introduced into the secondary collection tank 8 through the first brine discharge pipe 6 for storage, facilitating subsequent salt making.

[0064] The processing frame 1 adopts a cuboid structure (1m×2m), and has a small area (≤10m 2 The modular design of the primary collection tank 7 and the secondary collection tank 8 realizes the miniaturization of the equipment, which is suitable for islands, coastal areas or remote areas.

[0065] As shown in Figure 4 The one-way valve 11 is installed on the second fresh water discharge pipe 9 and the second brine discharge pipe 10 to prevent backflow, which effectively prevents the backflow of air to cause the processing frame 1, the first fresh water discharge pipe 4, the steam discharge pipe 5, the first brine discharge pipe 6, the primary collection tank 7, the secondary collection tank 8, the second fresh water discharge pipe 9 and the second brine discharge pipe 10 to be unable to be in a completely vacuum state.

[0066] As shown in Figure 4 The connection pipe 13 is installed on the primary collection tank 7 and the secondary collection tank 8, and the primary collection tank 7 and the secondary collection tank 8 are connected through the connection pipe 13, so as to ensure the pressure balance inside and avoid the siphon effect to cause abnormal flow.

[0067] As shown in Figure 4As shown, the water inlet end of the water inlet pipe 3 is provided with a flow valve 31, and the flow rate and flow of seawater flowing into the treatment frame 1 are controlled through the flow valve 31 (when the brine concentration in the treatment frame 1 is high, the flow rate of seawater is increased through the flow valve 31, and when the brine concentration in the treatment frame 1 is low, the flow rate of seawater is slowed down through the flow valve 31), so as to ensure the salinity in the brine.

[0068] Referring to Figure 1 As shown, the water pipe joint of the brine discharge port (connected with the first brine discharge pipe 6 or the treatment frame 1) is provided with a salinity sensor 61 for detecting the concentration of brine, and the salinity in the brine can be monitored in real time through the arrangement of the salinity sensor 61, so as to control the flow rate of seawater through the cooperation of the flow valve 31.

[0069] Referring to Figure 4 As shown, the inside of the primary collection tank 7 and the secondary collection tank 8 is provided with a water level valve 14 (a floating ball type mechanical valve), and when the water level in the primary collection tank 7 and the secondary collection tank 8 reaches the upper limit, the pump 12 is triggered to start, so as to discharge the liquid in the primary collection tank 7 and the secondary collection tank 8 through the second fresh water discharge pipe 9 and the second brine discharge pipe 10.

[0070] Referring to Figure 2 As shown, a plurality of water guide strips 102 are fixedly arranged in an interlaced manner on the inner bottom of the treatment frame 1, forming a serpentine flow channel, so as to prolong the flow path of seawater and ensure the evaporation efficiency.

[0071] Referring to Figure 4 As shown, one end of the first fresh water discharge pipe 4, the steam discharge pipe 5 and the first brine discharge pipe 6 penetrates into the inside of the water inlet pipe 3 from the water inlet pipe 3 near the seawater inlet of the treatment frame 1, and then extends out of the water inlet pipe 3 from the water inlet pipe 3 near the water inlet end (it is worth noting that the penetration and extension of the water inlet pipe 3 can be selected to be a water pipe joint with three orifices to ensure the feasibility of installation), and the part of the first fresh water discharge pipe 4, the steam discharge pipe 5 and the first brine discharge pipe 6 in the water inlet pipe 3 can be arranged in a straight line or a spiral interlaced manner (to ensure the flowability of seawater in the water inlet pipe 3), and by arranging the part of the first fresh water discharge pipe 4, the steam discharge pipe 5 and the first brine discharge pipe 6 in the water inlet pipe 3, the water vapor, the high-concentration brine and the fresh water can be further cooled by the non-demineralized seawater (normal temperature / low temperature), so as to condense the water vapor, ensure the condensation effect, and cool the fresh water and the brine.

[0072] A control terminal, the flow valve 31, the first brine discharge pipe 6, the pump 12 and the water level valve 14 are electrically connected with the control terminal, and the flow rate of seawater and the discharge concentration of brine (target salinity ≥200g / L) are adjusted in real time (through the flow valve 31) through the linkage control of the salinity sensor 61, the water level valve 14 and the flow valve 31, so as to reduce manual intervention.

[0073] During cleaning and maintenance, fresh water is introduced into the inlet pipe 3, and the flow valve 31 is opened to the maximum flow rate. The fresh water flows through the treatment frame 1, inlet pipe 3, first fresh water drain pipe 4, steam drain pipe 5, first brine drain pipe 6, primary collection tank 7, secondary collection tank 8, second fresh water drain pipe 9, and second brine drain pipe 10. Under the high-speed flushing of the fresh water, the impurities accumulated inside are flushed out (pump 12 extracts them), thus increasing the service life of the equipment.

[0074] Working principle:

[0075] like Figures 1-5 As shown:

[0076] Place the processing frame 1 in a high place with more sunlight, install the primary collection tank 7 in a shady place, and install the secondary collection tank 8 in a specific location (where it does not obstruct use).

[0077] By starting pump 12, the air inside the processing frame 1, the first fresh water pipe 4, the steam pipe 5, the first brine pipe 6, the primary collection tank 7, the secondary collection tank 8, the second fresh water pipe 9, and the second brine pipe 10 is extracted, so that the inside is in a vacuum state.

[0078] When the flow valve 31 is activated, seawater flows into the interior of the treatment frame 1 through the inlet pipe 3. Multiple staggered guide strips 102, fixedly installed at the bottom of the treatment frame 1, form a serpentine flow path, thus extending the seawater's flow path. Under sunlight, the internal temperature rises, causing the seawater temperature to increase. Simultaneously, the seawater boils in a vacuum environment, generating a large amount of water vapor. Some of this water vapor rises and adheres to the top of the treatment frame 1, where it condenses naturally into water droplets that fall into the freshwater collection plate 2. From there, it is discharged into the primary collection tank 7 through the first freshwater drain pipe 4. The remaining water vapor... The steam is discharged through the steam pipe 5 into the primary collection tank 7 and adheres to the inner wall of the primary collection tank 7. After natural condensation, water droplets are formed and fall into the primary collection tank 7. The salt content of the seawater increases after desalination, forming high-concentration brine. The brine is introduced into the secondary collection tank 8 through the first brine pipe 6 for storage (parts of the first freshwater pipe 4, steam pipe 5, and first brine pipe 6 are placed inside the water inlet pipe 3. The steam, high-concentration brine, and freshwater can be further cooled by the undesalinated seawater, thereby condensing the steam and ensuring the condensation effect, while also cooling the freshwater and brine).

[0079] The salinity of the brine is monitored in real time by the salinity sensor 61. When the brine concentration inside the processing frame 1 is high, the flow rate of the seawater is increased by the flow valve 31. When the brine concentration inside the processing frame 1 is low, the flow rate of the seawater is slowed down by the flow valve 31.

[0080] When the water level in the primary collection tank 7 and the secondary collection tank 8 reaches the upper limit, the pump 12 is triggered to start, thereby discharging the liquid inside the primary collection tank 7 and the secondary collection tank 8 through the second fresh water discharge pipe 9 and the second brine discharge pipe 10.

[0081] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical scheme of the present application, still falls within the protection scope of the present application.

Claims

1. A seawater desalination and salt production device, characterized in that, include: A processing frame (1) is provided with multiple water guide strips (102) at its inner bottom. A freshwater collection plate (2) is fixed at the center of the interior of the processing frame (1). The side of the processing frame (1) is connected to: (3) is an inlet pipe used for inputting seawater; The first freshwater pipe (4) is connected to the freshwater collection plate (2); Steam pipe (5) for discharging steam; The first brine drain pipe (6) is used to discharge high-concentration brine; A primary collection tank (7) is provided, wherein the steam pipe (5) and the first fresh water pipe (4) are connected to the primary collection tank (7), and a second fresh water pipe (9) is provided on the primary collection tank (7); Secondary collection tank (8), the first brine drain pipe (6) is connected to the secondary collection tank (8), and the secondary collection tank (8) is provided with a second brine drain pipe (10); Pumps (12) are installed at the ends of the second freshwater pipe (9) and the second brine pipe (10).

2. The seawater desalination and salt production apparatus according to claim 1, characterized in that: One-way valves (11) are installed on the second freshwater drain pipe (9) and the second brine drain pipe (10).

3. The seawater desalination and salt production apparatus according to claim 1, characterized in that: A flow valve (31) is installed at the inlet end of the water inlet pipe (3).

4. The seawater desalination and salt production apparatus according to claim 1, characterized in that: Both the primary collection tank (7) and the secondary collection tank (8) are equipped with water level valves (14) for monitoring and controlling the liquid level.

5. A seawater desalination and salt production apparatus according to claim 1, characterized in that: A salinity sensor (61) is installed at the connection between the first brine drain pipe (6) and the processing frame (1) to monitor the brine concentration in real time.

6. A seawater desalination and salt production apparatus according to claim 1, characterized in that: The processing frame (1) has a slanted opening (101) at the top, and a top cover (103) with an inverted triangular structure is installed on the slanted opening (101).

7. A seawater desalination and salt production apparatus according to claim 6, characterized in that: The top cover (103) is made of tempered glass, and the bottom center of the top cover (103) is located above the freshwater collection plate (2).

8. A seawater desalination and salt production apparatus according to claim 1, characterized in that: The primary collection tank (7) and the secondary collection tank (8) are connected by a connecting pipe (13) to achieve internal pressure balance.

9. A seawater desalination and salt production apparatus according to claim 1, characterized in that: Multiple water guide strips (102) are arranged in an alternating pattern and fixed to the inner bottom of the treatment frame (1) to extend the seawater flow path and promote evaporation.

10. A seawater desalination and salt production apparatus according to claim 1, characterized in that: A section of the first freshwater drain pipe (4), the steam drain pipe (5), and the first brine drain pipe (6) is placed inside the inlet pipe (3) and extends out of the inlet pipe (3).

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