A multi-stage purification device for water treatment

Abstract

The present invention discloses a multi-stage purification device for water treatment, which relates to the technical field of water treatment; in order to solve the problem of heating uniformity; specifically comprises a base, the top outer wall of the base is provided with a heat exchange preheating part, an evaporation part and a fresh water storage tank, the top of the fresh water storage tank is provided with a condensation part, and the heat exchange preheating part, the evaporation part, the condensation part and the fresh water storage tank are connected in sequence. The present invention provides a rotatable heating plate, which can make the spray pipe spray to the surface of the heating plate more uniformly, prevent the local overheating caused by the four corners, and increase the safety. At the same time, by making the number of groups of the heating plate greater than the number of groups of the spray pipe, the heating plate can be made to work intermittently, so that the temperature of the heating plate itself is in periodic fluctuation, so that the cracking, loosening and falling of the sea salt can be achieved in combination with the different thermal expansion coefficients of the sea salt and the heating plate, and the self-purification function of the heating plate is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a multi-stage purification device for water treatment. Background Art

[0002] Ships require fresh water resources for drinking and living water, but the fresh water stored in ships is limited. When the sailing cycle is long, seawater needs to be converted into fresh water resources for use.

[0003] In the prior art, seawater desalination has to go through multiple processing steps of filtering, evaporation and condensation. For example, after searching, the Chinese patent publication number CN117164041B discloses a high-power seawater desalination equipment for ships, including an evaporation box, a heating plate arranged inside the evaporation box, and spray heads arranged on both sides of the heating plate. Each of the spray heads is connected to a group of seawater supply parts. The top of the evaporation box is provided with an exhaust port, and the exhaust port is connected to a condenser. The interior of the evaporation box is provided with two groups of vibration descaling parts for applying vibration to the heating plate.

[0004] The above patent has the following shortcomings: it uses a spray head to spray seawater onto the heating plate for evaporation, and the spraying angle of the spray head is fixed, and the position of the heating plate is also fixed, which makes the heating plate have a spraying dead angle, so that part of the heating plate cannot participate in the evaporation work, and this part of the heating plate will overheat and there is a risk of damage.

[0005] To this end, the present invention provides a multi-stage purification device for water treatment. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a multi-stage purification device for water treatment.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A multi-stage purification device for water treatment, comprising a base,

[0009] The top outer wall of the base is provided with a heat exchange preheating part, an evaporation part and a fresh water storage tank, the top of the fresh water storage tank is provided with a condensation part, the heat exchange preheating part, the evaporation part, the condensation part and the fresh water storage tank are connected in sequence, and the water inlet end of the heat exchange preheating part is provided with a connecting hose, and the other end of the connecting hose is provided with a ball cage filter head;

[0010] The evaporation part includes a shell body fixed to the outer wall of the base, a main shaft rotatably connected to the inner wall of the shell body, and a motor fixed to the end of the shell body by bolts, the output shaft of the motor is connected to the end of the main shaft by a coupling, and a heat-resistant bracket is fixed to the outer wall of the main shaft, and a plurality of circular array heating plates are fixed to the inner wall of the heat-resistant bracket, a liquid spray pipe for conveying seawater is fixed to the inner wall of the shell body, and the side wall of the liquid spray pipe is provided with uniform spray holes, and a steam outlet connected to the interior of the shell body is welded to the outer wall of the shell body.

[0011] Preferably: a fixed ring seat is fixed to the inner side wall of the shell one, and a plurality of groups of arc head shock rods are radially slidably connected inside the fixed ring seat, a spring one is buckled at the end of the arc head shock rod, and the other end of the spring one is buckled to the inner wall of the fixed ring seat, and a plurality of groups of limit grooves cooperating with the arc head shock rods are provided on the outer wall of the main shaft.

[0012] Furthermore: an elastic hose is bonded and fixed to the inner wall of the shell one, one end of the elastic hose is connected to the liquid spray pipe, and the other end of the elastic hose is connected to the seawater outlet of the heat exchange preheating part through the seawater inlet pipe, and a bracket is fixed to the outer wall of the main shaft, and a plurality of rollers are rotatably connected to the inner side of the bracket, and the rollers are squeezed and matched with the elastic hose.

[0013] On the basis of the above scheme: the condensation part includes two end covers and a hollow cylinder fixed on opposite sides of the two end covers, a confluence cavity is arranged inside the end cover, the opposite sides of the two confluence cavities are connected by a plurality of condensation tubes, and the other side of the confluence cavity is connected with a confluence port, one of the confluence ports is connected to the steam outlet, and the other confluence port is connected to the water inlet of the fresh water storage tank, and two circulation ports connected to the inner cavity of the hollow cylinder are welded on the side wall of the hollow cylinder.

[0014] A better solution among the above solutions is that the two circulation ports are arranged diagonally.

[0015] As a further solution of the present invention: the heat exchange preheating part includes a shell 2 and a heat exchange tube, the two sides of the shell 2 are respectively connected to the connecting hose and the seawater inlet pipe, the heat exchange tube is fixed inside the shell 2, and the two ends of the heat exchange tube are respectively connected to two circulation pipes.

[0016] Meanwhile, a fluid driven pump is arranged on one of the circulation pipes.

[0017] As a preferred embodiment of the present invention: the heating plate is electrically connected to a power supply part, the power supply part includes a magnetic conductive core and a shell, the outer walls on both sides of the magnetic conductive core are respectively wound with the secondary coil and the primary coil, the primary coil is connected to an AC power supply, the inner wall of the shell is slidably connected to a sliding rod, the end of the sliding rod is fixed with an insulating seat by bolts, a spring electrode is installed on one side of the insulating seat, an insulating ring is fixed to the outer wall of the magnetic conductive core at one end of the secondary coil, the spring electrode is not in contact with the secondary coil and the insulating ring at the same time, and one end of the magnetic conductive core and the spring electrode are respectively electrically connected to the two terminal blocks of the heating plate.

[0018] At the same time, a permanent magnet is fixed to the other end of the slide rod by bolts, an electromagnet that cooperates with the permanent magnet is fixed inside the shell, the permanent magnet and the electromagnet have the same magnetic pole on the opposite side, a spring 2 is buckled inside the shell, and the other end of the spring 2 is buckled to the outer wall of the slide rod.

[0019] As a more optimal solution of the present invention: the outer wall of the shell is fixed with a stator winding by bolts, the output terminal of the stator winding is electrically connected to the input terminal of the electromagnet, and the outer wall of the main shaft is fixed with a rotor core that cooperates with the stator winding.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention, by arranging a rotatable heating plate, can make the spray pipe spray to the surface of the heating plate more uniformly, prevent local overheating caused by the four corners, and increase safety. At the same time, by making the number of heating plates larger than the number of spray pipes, the heating plate can work intermittently, so that the temperature of the heating plate itself is in periodic fluctuation, so that the sea salt can be cracked, loosened and fallen off in combination with the different thermal expansion coefficients of the sea salt and the heating plate, thereby achieving the self-purification function of the heating plate.

[0022] 2. The present invention, by setting a spring, an arc head vibration rod and a limit groove, utilizes the periodic separation and coordination of the arc head vibration rod and the limit groove to generate vibration, thereby transmitting the vibration to the heat-resistant bracket and the heating plate, and utilizes the vibration to shake off the cracked and loose sea salt, thereby increasing the self-purification effect of the heating plate.

[0023] 3. The present invention, by providing components such as an elastic hose and a roller, can utilize the roller to squeeze the elastic hose to achieve seawater transportation, and then achieve seawater suction by resetting the elastic hose, thereby achieving contactless seawater transportation, avoiding seawater erosion of the impeller, and increasing the service life.

[0024] 4. The present invention, by configuring the fresh water storage tank as a combination of an end cover, a condenser and a hollow cylinder, can divert water vapor for heat exchange and then converge for storage, thereby increasing the contact area between water vapor and coolant, increasing heat exchange efficiency and increasing condensation effect.

[0025] 5. The present invention, by providing a heat exchange preheating part, can transport the heat absorbed by the coolant in the heat exchange with the steam to the heat exchange tube, so that it can exchange heat with the inhaled seawater to preheat the seawater. On the one hand, the cooling effect of the coolant is satisfied, and on the other hand, the energy required for the subsequent evaporation of the preheated seawater is reduced, thereby realizing energy recovery and increasing energy-saving effects.

[0026] 6. The present invention, by setting the stator winding, the rotor core and the power supply part, can adjust the heating speed of the heating plate through the power supply part, and the adjustment of the power supply part depends on the drive of the stator winding. The electric energy of the stator winding is related to the rotation speed of the main shaft, and the seawater supply speed is also related to the rotation speed of the main shaft, thereby achieving the matching of the seawater supply speed and the heating speed of the heating plate and increasing reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a multi-stage purification device for water treatment proposed by the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the evaporation part of a multi-stage purification device for water treatment proposed by the present invention;

[0029] Figure 3 This is a schematic diagram of the installation position structure of the arc head vibrating rod and the limit groove of a multi-stage purification device for water treatment proposed by the present invention;

[0030] Figure 4 This is a schematic diagram of the elastic hose and roller structure of a multi-stage purification device for water treatment proposed by the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of the condensation part of a multi-stage purification device for water treatment proposed by the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of a heat exchange preheating part of a multi-stage purification device for water treatment proposed by the present invention;

[0033] Figure 7 This is a schematic diagram of the stator winding and rotor core structure of a multi-stage purification device for water treatment proposed by the present invention;

[0034] Figure 8 This is a schematic cross-sectional structural diagram of a power supply unit of a multi-stage purification device for water treatment proposed by the present invention.

[0035] In the figure: 1, base; 2, evaporation part; 3, heat exchange preheating part; 4, connecting hose; 5, ball cage filter head; 6, shell 1; 7, heating plate; 8, heat-resistant bracket; 9, motor; 10, spray pipe; 11, bottom cover; 12, main shaft; 13, steam outlet; 14, fixed ring seat; 15, spring 1; 16, arc head shock rod; 17, limit groove; 18, bracket; 19, elastic hose; 20, roller; 21, seawater inlet pipe; 22, confluence; 23, End cover; 24, condenser; 25, hollow cylinder; 26, circulation port; 27, shell 2; 28, circulation pipe; 29, heat exchange tube; 30, stator winding; 31, rotor core; 32, magnetic core; 33, secondary coil; 34, spring electrode; 35, insulating seat; 36, insulating ring; 37, spring 2; 38, shell; 39, slide rod; 40, permanent magnet; 41, electromagnet; 42, primary coil; 43, condensation part; 44, fresh water storage tank. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0037] Embodiments of the present invention are described in detail below, examples of which 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.

[0038] Embodiment 1:

[0039] A multi-stage purification device for water treatment, such as Figure 1-Figure 8 As shown, it includes a base 1, the top outer wall of the base 1 is provided with a heat exchange preheating part 3, an evaporation part 2 and a fresh water storage tank 44, the top of the fresh water storage tank 44 is provided with a condensation part 43, the heat exchange preheating part 3, the evaporation part 2, the condensation part 43, and the fresh water storage tank 44 are connected in sequence, and the water inlet end of the heat exchange preheating part 3 is provided with a connecting hose 4, and the other end of the connecting hose 4 is provided with a ball cage filter head 5, and the ball cage filter head 5 is placed in a container containing seawater or directly placed in the sea.

[0040] The evaporation section 2 includes a shell 6 fixed to the outer wall of the base 1, a main shaft 12 rotatably connected to the inner wall of the shell 6, and a motor 9 fixed to the end of the shell 6 by bolts, the output shaft of the motor 9 is connected to the end of the main shaft 12 through a coupling, and a heat-resistant bracket 8 is fixed to the outer wall of the main shaft 12, and a plurality of circular array heating plates 7 are fixed to the inner wall of the heat-resistant bracket 8, a liquid spray pipe 10 for conveying seawater is fixed to the inner wall of the shell 6, and a uniform spray hole is opened on the side wall of the liquid spray pipe 10, and a steam outlet 13 connected to the interior of the shell 6 is welded to the outer wall of the shell 6.

[0041] The number of groups of the heating plates 7 is greater than the number of groups of the liquid spraying pipes 10 .

[0042] When the device is in use, seawater is input through the spray pipe 10 and sprayed onto the surface of the heating plate 7 through the spray hole. At this time, the heating plate 7 and the motor 9 are started, and the heating plate 7 can heat and evaporate the seawater. At the same time, the motor 9 can drive the heating plate 7 to rotate through the main shaft 12. Since the number of groups of the heating plates 7 is greater than the number of groups of the spray pipe 10, the three heating plates 7 evaporate the seawater intermittently, so that the working process of a single heating plate 7 is: heating and rapid temperature rise - cooling by spraying seawater - reheating and rapid temperature rise, and so on.

[0043] The device, by arranging a rotatable heating plate 7, can make the spray pipe 10 spray onto the surface of the heating plate 7 more uniformly, prevent local overheating caused by the four corners, and increase safety. At the same time, by making the number of groups of heating plates 7 greater than the number of groups of spray pipes 10, the heating plate 7 can work intermittently, so that the temperature of the heating plate 7 itself is in periodic fluctuation, so that the sea salt can be cracked, loosened and fallen off in combination with the different thermal expansion coefficients of the sea salt and the heating plate 7, thereby achieving the self-purification function of the heating plate 7.

[0044] In order to solve the purification effect problem; Figure 3 As shown, a fixed ring seat 14 is fixed to the inner side wall of the shell 6, and multiple groups of arc head shock rods 16 are radially slidably connected inside the fixed ring seat 14. The end of the arc head shock rod 16 is buckled with a spring 15, and the other end of the spring 15 is buckled to the inner wall of the fixed ring seat 14, and the outer wall of the main shaft 12 is provided with multiple groups of limit grooves 17 cooperating with the arc head shock rod 16.

[0045] When the main shaft 12 rotates, the limiting groove 17 will rotate relative to the arc head shock rod 16, so that the arc head shock rod 16 is constantly separated from and matched with the limiting groove 17, so that when matching, the arc head shock rod 16 can bounce into the inside of the limiting groove 17 to achieve impact.

[0046] The device, by setting a spring 15, an arc-headed shock rod 16 and a limiting groove 17, utilizes the periodic separation and coordination of the arc-headed shock rod 16 and the limiting groove 17 to generate vibration, thereby transmitting the vibration to the heat-resistant bracket 8 and the heating plate 7, and utilizing the vibration to shake off the cracked and loose sea salt, thereby increasing the self-purification effect of the heating plate 7.

[0047] In order to solve the problem of fluid delivery; Figure 4As shown, an elastic hose 19 is bonded and fixed to the inner wall of the shell 16, one end of the elastic hose 19 is connected to the liquid spray pipe 10, and the other end of the elastic hose 19 is connected to the seawater outlet of the heat exchange preheating part 3 through the seawater inlet pipe 21, and a bracket 18 is fixed to the outer wall of the main shaft 12, and a plurality of rollers 20 are rotatably connected to the inner side of the bracket 18, and the rollers 20 are squeezed and matched with the elastic hose 19.

[0048] When the main shaft 12 rotates, it can drive the bracket 18 to rotate, thereby driving the roller 20 to rotate and squeeze the elastic hose 19, squeezing the seawater in the elastic hose 19 into the spray pipe 10, and at the same time, the elastic hose 19 rebounds after being squeezed, and the negative pressure of the rebound is used to suck seawater through the seawater inlet pipe 21.

[0049] Since seawater is highly corrosive, the use of traditional pumps for transportation will cause serious corrosion of the impeller. The device, by providing an elastic hose 19, a roller 20 and other components, can use the roller 20 to squeeze the elastic hose 19 to achieve seawater transportation, and then achieve seawater suction by resetting the elastic hose 19, thereby achieving contactless seawater transportation, avoiding seawater erosion of the impeller, and increasing the service life.

[0050] To solve the condensation problem; Figure 5 As shown, the condensation section 43 includes two end covers 23 and a hollow cylinder 25 fixed to opposite sides of the two end covers 23, a confluence cavity is arranged inside the end cover 23, the opposite sides of the two confluence cavities are connected through a plurality of condensing tubes 24, and the other side of the confluence cavity is connected with a confluence port 22, one of the confluence ports 22 is connected to the steam outlet 13, and the other confluence port 22 is connected to the water inlet of the fresh water storage tank 44, and two circulation ports 26 connected to the inner cavity of the hollow cylinder 25 are welded on the side wall of the hollow cylinder 25, and the two circulation ports 26 are preferably arranged diagonally.

[0051] The coolant can be transported and output through the two circulation ports 26. When steam enters from the confluence port 22, it will enter the multiple condensers 24 through the confluence cavity, and condensation is achieved through heat exchange between the condenser tubes 24 and the coolant. The condensed water is then confluent through another confluence cavity and then enters the fresh water storage tank 44 along the confluence port 22 for storage.

[0052] The device, by configuring the fresh water storage tank 44 as a combination of the end cover 23, the condenser tube 24, and the hollow cylinder 25, can separate the water vapor for heat exchange and then converge for storage, thereby increasing the contact area between the water vapor and the coolant, increasing the heat exchange efficiency, and increasing the condensation effect.

[0053] In order to solve the energy saving problem; Figure 6As shown, the heat exchange preheating part 3 includes a shell 27 and a heat exchange tube 29. The two sides of the shell 27 are respectively connected to the connecting hose 4 and the seawater inlet pipe 21. The heat exchange tube 29 is fixed inside the shell 27, and the two ends of the heat exchange tube 29 are respectively connected to two circulation tubes 28, one of which is provided with a fluid-driven pump.

[0054] Seawater can enter the shell 27 through the connecting hose 4, and then enter the seawater inlet pipe 21, and the coolant is heated after heat exchange with water vapor. The heated coolant will flow through the heat exchange tube 29 and exchange heat with the seawater, so that the seawater is heated and preheated, while the coolant is cooled, and then the cooled coolant enters the circulation pipe 28 for circulation.

[0055] The device, by providing a heat exchange preheating part 3, can transfer the heat absorbed by the heat exchange between the coolant and the steam to the heat exchange tube 29, so that it can exchange heat with the inhaled seawater to preheat the seawater. On the one hand, the cooling effect of the coolant is satisfied, and on the other hand, the energy required for the subsequent evaporation of the preheated seawater is reduced, thereby realizing energy recovery and increasing energy saving effect.

[0056] When the present embodiment is in use, seawater is input through the liquid spraying pipe 10 and sprayed onto the surface of the heating plate 7 through the spray hole. At this time, the heating plate 7 and the motor 9 are started, and the heating plate 7 can heat and evaporate the seawater. At the same time, the motor 9 can drive the heating plate 7 to rotate through the main shaft 12. Since the number of groups of the heating plates 7 is greater than the number of groups of the liquid spraying pipe 10, the three heating plates 7 evaporate the seawater intermittently, so that the working process of a single heating plate 7 is: heating and rapidly heating up - cooling down by spraying seawater - heating and rapidly heating up again, and so on. When the main shaft 12 rotates, the limit groove 17 will rotate relative to the arc head shock rod 16, so that the arc head shock rod 16 is continuously separated and matched with the limit groove 17, so that when matching, the arc head shock rod 16 can bounce into the inside of the limit groove 17 to achieve collision. When the main shaft 12 rotates, it can drive the bracket 18 to rotate, thereby driving the roller 2 0 rotates and squeezes the elastic hose 19, squeezing the seawater in the elastic hose 19 into the spray pipe 10, and the squeezed elastic hose 19 rebounds at the same time, and the seawater is sucked in through the seawater inlet pipe 21 by the negative pressure of the rebound, and the coolant can be transported and output through the two circulation ports 26. When the steam enters from the confluence port 22, it will enter the multiple condensing tubes 24 through the confluence cavity, and condense through the condensing tubes 24 and the coolant heat exchange to achieve condensation. After the condensed water is confluent through another confluence cavity, it enters the fresh water storage tank 44 along the confluence port 22 for storage. The seawater can enter the shell 27 through the connecting hose 4, and then enter the seawater inlet pipe 21. The coolant is heated after heat exchange with the water vapor. The heated coolant flows through the heat exchange tube 29 and exchanges heat with the seawater, so that the seawater is heated and preheated, and the coolant is cooled at the same time. Then the cooled coolant enters the circulation pipe 28 for circulation.

[0057] Embodiment 2:

[0058] A multi-stage purification device for water treatment, such as Figure 1-Figure 8 As shown, in order to solve the problem of synchronization between heating and water volume; this embodiment makes the following improvements on the basis of embodiment 1: the heating plate 7 is electrically connected to a power supply, and the power supply includes a magnetic core 32 and a shell 38. The outer walls of the magnetic core 32 on both sides are respectively wound around the secondary coil 33 and the primary coil 42, and the primary coil 42 is connected to an AC power supply. The inner wall of the shell 38 is slidably connected with a slide rod 39, and the end of the slide rod 39 is fixed with an insulating seat 35 by bolts, and a spring electrode 34 is installed on one side of the insulating seat 35. The outer wall of the magnetic core 32 located at one end of the secondary coil 33 is fixed with an insulating ring 36, and the spring electrode 34 is not in contact with the secondary coil 33 and the insulating ring 36 at the same time, and one end of the magnetic core 32 and the spring electrode 34 are respectively electrically connected to the two terminals of the heating plate 7.

[0059] The other end of the slide rod 39 is fixed with a permanent magnet 40 by bolts, and an electromagnet 41 that cooperates with the permanent magnet 40 is fixed inside the shell 38. The magnetic poles of the permanent magnet 40 and the electromagnet 41 on the opposite side are the same. A spring 2 37 is buckled inside the shell 38, and the other end of the spring 2 37 is buckled to the outer wall of the slide rod 39.

[0060] The stator winding 30 is fixed to the outer wall of the housing 1 6 by bolts, the output terminal of the stator winding 30 is electrically connected to the input terminal of the electromagnet 41 , and the rotor core 31 matching with the stator winding 30 is fixed to the outer wall of the main shaft 12 .

[0061] The bottom outer wall of the housing 1 6 is fixed with a bottom cover 11 by bolts.

[0062] When the present embodiment is in use, when the main shaft 12 does not rotate, the rotor core 31 and the stator winding 30 do not rotate relative to each other, so that an induced electromotive force is generated inside the stator winding 30, and the electromagnet 41 is not energized. At this time, the slide bar 39 is retracted into the housing 38 by the elastic force of the spring 2 37, and the spring electrode 34 contacts the insulating ring 36. At this time, the circuit of the heating plate 7 is not conductive, and the heating plate 7 does not work. When it is necessary to desalinate seawater, the main shaft 12 rotates, thereby driving the rotor core 31 and the stator winding 30 to rotate relative to each other, generating an induced electromotive force inside the stator winding 30, and applying the electromotive force to the electromagnet 41. The electromagnet 41 generates a magnetic field, and the repulsive force between the electromagnet 41 and the permanent magnet 40 enables the slide bar 39 to overcome the elastic force of the spring 37 and move, thereby driving the spring electrode 34 to separate from the insulating ring 36, and the spring electrode 34 and the secondary coil 33 to contact and cooperate to be turned on, and the circuit of the heating plate 7 is turned on. When the speed of seawater desalination is faster, the speed of the main shaft 12 is faster, and the contact position of the spring electrode 34 and the secondary coil 33 changes, so that the number of turns of the secondary coil 33 connected to the power supply circuit of the heating plate 7 increases, thereby increasing the induced electromotive force generated by the secondary coil 33 and increasing the heating power of the heating plate 7.

[0063] Since the conveying speed of seawater and the heating speed of the heating plate 7 need to match, if they do not match, the following problems will occur:

[0064] ①: The seawater supply speed is fast, but the heating speed is slow. At this time, the seawater cannot be completely evaporated and will gradually accumulate in the shell 6. When the shell 6 is completely filled, the heating speed of the heating plate 7 will not evaporate the seawater, and the seawater will directly enter the condensation part 43 along the steam outlet 13, causing the seawater and fresh water to mix;

[0065] ②: The seawater supply speed is slow and the heating speed is fast. At this time, the heat of the heating plate 7 itself cannot be completely absorbed, and it will be damaged by high temperature.

[0066] To this end, the device is provided with a stator winding 30, a rotor core 31 and a power supply unit, and the heating speed of the heating plate 7 can be adjusted by the power supply unit. The adjustment of the power supply unit depends on the drive of the stator winding 30. The electric energy of the stator winding 30 is related to the rotation speed of the main shaft 12, and the seawater supply speed is also related to the rotation speed of the main shaft 12, thereby achieving the matching of the seawater supply speed and the heating speed of the heating plate 7 and increasing reliability.

[0067] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-stage purification device for water treatment, comprising a base (1), characterized in that: The top outer wall of the base (1) is provided with a heat exchange preheating section (3), an evaporation section (2) and a fresh water storage tank (44); the top of the fresh water storage tank (44) is provided with a condensation section (43); the heat exchange preheating section (3), the evaporation section (2), the condensation section (43) and the fresh water storage tank (44) are connected in sequence; a connecting hose (4) is provided at the water inlet end of the heat exchange preheating section (3); and a ball cage filter head (5) is provided at the other end of the connecting hose (4); The evaporation section (2) comprises a shell (6) fixed to the outer wall of the base (1), a main shaft (12) rotatably connected to the inner wall of the shell (6), and a motor (9) fixed to the end of the shell (6) by bolts, the output shaft of the motor (9) being connected to the end of the main shaft (12) by a coupling, and a heat-resistant bracket (8) being fixed to the outer wall of the main shaft (12), and a plurality of circular array heating plates (7) being fixed to the inner wall of the heat-resistant bracket (8), a liquid spray pipe (10) for conveying seawater being fixed to the inner wall of the shell (6), and a uniform spray hole being provided on the side wall of the liquid spray pipe (10), and a steam outlet (13) being connected to the interior of the shell (6) being welded to the outer wall of the shell (6); The number of groups of the heating plates (7) is greater than the number of groups of the liquid spraying pipes (10), and the heating plates (7) work intermittently; A fixed ring seat (14) is fixed to the inner side wall of the housing (6), a plurality of groups of arc head shock rods (16) are radially slidably connected inside the fixed ring seat (14), a spring (15) is buckled to the end of the arc head shock rod (16), the other end of the spring (15) is buckled to the inner wall of the fixed ring seat (14), and a plurality of groups of limit grooves (17) cooperating with the arc head shock rods (16) are provided on the outer wall of the main shaft (12); An elastic hose (19) is bonded and fixed to the inner wall of the shell (6), one end of the elastic hose (19) is connected to the liquid spraying pipe (10), and the other end of the elastic hose (19) is connected to the seawater outlet of the heat exchange preheating part (3) through a seawater inlet pipe (21), and a bracket (18) is fixed to the outer wall of the main shaft (12), and a plurality of rollers (20) are rotatably connected to the inner side of the bracket (18), and the rollers (20) are extruded and matched with the elastic hose (19); The condensation section (43) comprises two end covers (23) and a hollow cylinder (25) fixed to opposite sides of the two end covers (23), wherein a confluence cavity is arranged inside the end covers (23), wherein opposite sides of the two confluence cavities are connected via a plurality of condensation pipes (24), and the other side of the confluence cavity is connected to a confluence port (22), wherein one confluence port (22) is connected to the steam outlet (13), and the other confluence port (22) is connected to the water inlet of the fresh water storage tank (44), and two circulation ports (26) connected to the inner cavity of the hollow cylinder (25) are welded to the side wall of the hollow cylinder (25); The two circulation ports (26) are arranged diagonally; The heat exchange preheating part (3) comprises a second shell (27) and a heat exchange tube (29), the two sides of the second shell (27) are respectively connected to a connecting hose (4) and a seawater inlet pipe (21), the heat exchange tube (29) is fixed inside the second shell (27), and the two ends of the heat exchange tube (29) are respectively connected to two circulation tubes (28); A fluid-driven pump is provided on one of the circulation pipes (28); The heating plate (7) is electrically connected to a power supply unit, the power supply unit comprising a magnetic core (32) and a shell (38), the outer walls on both sides of the magnetic core (32) are respectively wound around the secondary coil (33) and the primary coil (42), the primary coil (42) is connected to an AC power source, the inner wall of the shell (38) is slidably connected to a slide bar (39), the end of the slide bar (39) is fixed to an insulating seat (35) by bolts, a spring electrode (34) is installed on one side of the insulating seat (35), an insulating ring (36) is fixed to the outer wall of the magnetic core (32) at one end of the secondary coil (33), the spring electrode (34) is not in contact with the secondary coil (33) and the insulating ring (36) at the same time, and one end of the magnetic core (32) and the spring electrode (34) are respectively electrically connected to two wiring terminals of the heating plate (7); The other end of the slide bar (39) is fixed with a permanent magnet (40) by means of bolts, an electromagnet (41) matched with the permanent magnet (40) is fixed inside the housing (38), the magnetic poles of the permanent magnet (40) and the electromagnet (41) on the opposite side are the same, a second spring (37) is buckled inside the housing (38), and the other end of the second spring (37) is buckled with the outer wall of the slide bar (39); A stator winding (30) is fixed to the outer wall of the housing (6) by means of bolts, an output terminal of the stator winding (30) is electrically connected to an input terminal of the electromagnet (41), and a rotor core (31) matched with the stator winding (30) is fixed to the outer wall of the main shaft (12).

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