A marine seawater desalination apparatus

Abstract

The utility model discloses a kind of seawater desalination equipment for boat, including prefilter, prefilter includes jar body, the top of jar body is provided with water outlet pipe, the bottom of jar body is provided with water inlet pipe and blow-off pipe, the inside of jar body is provided with multiple filter core;Filter core includes fixed ring, the immediately below of fixed ring is slidably provided with movable ring, movable ring is connected with fixed ring by elastic member, flexible connecting sleeve is arranged between fixed ring and movable ring, the inner side of fixed ring and movable ring is all provided with isolation net.The utility model prefilter can clean filter core by the way of reverse flushing, when filter core normal filtration, movable ring and fixed ring are jointly compressed filter material under the action of elasticity, so that filter material normal filtration;When reverse flushing, water pressure makes movable ring away from fixed ring, so that the clearance of filter material is increased after loosening, water flow can penetrate into filter material inside, improve the cleaning effect of filter material.

Description

Technical Field

[0001] This utility model belongs to the technical field of seawater desalination equipment, and particularly relates to a seawater desalination device for boats. Background Technology

[0002] Seawater desalination equipment is an industrial device that converts seawater into fresh water. Existing seawater desalination equipment is usually equipped with a pre-filter to remove impurities such as suspended solids, particulate matter, microorganisms, and organic matter from seawater, preventing them from entering the reverse osmosis membrane or other seawater desalination equipment, avoiding membrane surface clogging, scratches, or scaling, thereby extending the service life of the equipment and ensuring stable system operation.

[0003] Patent CN222324473U discloses a pre-filter device for seawater desalination, which cleans adhering impurities by reciprocating the movement of the filter element. However, this cleaning method can only clean impurities adhering to the surface of the filter element to a certain extent. It is difficult to clean impurities that are blocked inside the filter element, which makes the filter element prone to clogging and affects the filtration effect.

[0004] Therefore, it is necessary to improve the existing seawater desalination equipment. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a seawater desalination device for boats that improves the self-cleaning effect of the pre-filter.

[0006] To achieve the above objectives, the specific technical solution of the seawater desalination equipment for boats of this utility model is as follows: A seawater desalination device for boats includes a pre-filter, the pre-filter including a tank, an outlet pipe at the top of the tank, an inlet pipe and a drain pipe at the bottom of the tank, and multiple filter elements arranged vertically inside the tank. The filter element includes a fixed ring that is sealed and fixed to the tank body. A movable ring is slidably disposed directly below the fixed ring. The movable ring is connected to the fixed ring through an elastic element. A flexible connecting sleeve is disposed between the fixed ring and the movable ring. An isolation net is disposed on the inner side of both the fixed ring and the movable ring. The fixed ring, the movable ring and the connecting sleeve enclose and form an inner cavity for accommodating the filter material.

[0007] Preferably, the elastic element includes a guide rod fixedly connected to the fixed ring and a guide sleeve fixedly connected to the movable ring, the guide sleeve being slidably engaged with the guide rod, and a spring being provided between the guide rod and the movable ring.

[0008] Preferably, both ends of the guide sleeve are chamfered in the circumferential direction, so that both ends of the guide sleeve form circumferentially distributed cutting edges.

[0009] Preferably, a support bar is fixedly connected to the inner side of the movable ring.

[0010] Preferably, the cross-section of the support bar is a V-shaped structure with the opening facing outwards.

[0011] Preferably, the inner cavity of the tank includes a plurality of cylindrical mounting sections coaxially connected in sequence along its own axial direction. The inner diameter of each mounting section decreases sequentially in the vertical direction, so that the top of the mounting section forms a stepped portion. The top of the tank is open and the sealing cover is provided with a top cover. The fixing ring is sealed and abuts against the stepped portion. In the vertical direction, the guide rod on the previous fixing ring abuts against the next fixing ring. The uppermost fixing ring is detachably connected to the stepped portion.

[0012] Preferably, the movable ring is slidably and sealingly connected to the inner wall of the mounting section, and the guide rod is slidably and sealingly connected to the guide sleeve.

[0013] Preferably, the filter further includes a dosing tank, a sludge tank, a clean water tank, and a membrane chamber. The outlet pipe of the pre-filter is connected to the inlet of the membrane chamber, the outlet of the membrane chamber is connected to the clean water tank, the drain pipe of the pre-filter is connected to the sludge tank, and the inlet pipe of the pre-filter is connected to the dosing tank.

[0014] The seawater desalination equipment for boats of this utility model has the following advantages: the pre-filter can be cleaned by backwashing. When the filter element is filtering normally, the movable ring and the fixed ring press the filter media together under the action of elasticity, so that the filter media can filter normally. During backwashing, the water pressure makes the movable ring move away from the fixed ring, which loosens the filter media and increases the gap. The water flow can penetrate into the interior of the filter media and improve the cleaning effect on the filter media. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the seawater desalination equipment of this utility model; Figure 2 This is a schematic diagram of the structure of the pre-filter of this utility model; Figure 3 This is a cross-sectional view of the pre-filter of this utility model; Figure 4 This is a cross-sectional view of the tank body of this utility model; Figure 5 This is a schematic diagram of the filter element of this utility model; Figure 6 This is a schematic diagram of the structure of the movable ring of this utility model; The markings in the diagram are as follows: 1. Pre-filter; 2. Filter element; 3. Dosing tank; 4. Sludge tank; 5. Clean water tank; 6. Membrane chamber; 101. Top cover; 102. Outlet pipe; 103. Inlet pipe; 104. Sewage pipe; 105. Installation section; 106. Step section; 107. Tank body; 201. Fixing ring; 202. Isolation net; 203. Movable ring; 204. Connecting sleeve; 205. Guide rod; 206. Spring; 207. Support bar; 208. Guide sleeve; 209. Cutting edge. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0017] The terms "top surface," "bottom surface," and "full surface" are used with reference to the normal operating state of the seawater desalination equipment and are only for the convenience of describing this utility model and simplifying the description. They are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] like Figure 1-3 As shown, a seawater desalination device for boats includes a pre-filter 1. The pre-filter 1 includes a tank 107. A water outlet pipe 102 is provided at the top of the tank 107, and a water inlet pipe 103 and a sewage outlet pipe 104 are provided at the bottom of the tank 107. Multiple filter elements 2 are arranged vertically inside the tank 107. Each filter element 2 includes a fixed ring 201 that is sealed and fixed to the tank 107. A movable ring 203 is slidably arranged directly below the fixed ring 201. The movable ring 203 is connected to the fixed ring 201 through an elastic element. A flexible connecting sleeve 204 is provided between the fixed ring 201 and the movable ring 203. An isolation net 202 is provided on the inner side of both the fixed ring 201 and the movable ring 203. The fixed ring 201, the movable ring 203, and the connecting sleeve 204 enclose an inner cavity for accommodating filter media.

[0019] The aforementioned seawater desalination equipment is suitable for desalinating seawater on ships. The pre-filter 1 removes suspended solids, particulate matter, microorganisms, organic matter, and other impurities from the seawater. Valves are installed on the inlet pipe 103, outlet pipe 102, and drain pipe 104 of the pre-filter 1 for opening and closing the respective pipes. During normal operation of the pre-filter 1, the drain pipe 104 is closed, while the inlet pipe 103 and outlet pipe 102 are open. Seawater enters the tank 107 through the inlet pipe 103 and then passes through... Each filter element 2 performs filtration, and the filtered seawater is discharged from the outlet pipe 102. After a period of use, the pre-filter 1 needs to be self-cleaned. At this time, the inlet pipe 103 is closed, and the outlet pipe 102 and the sewage pipe 104 are opened. A high-pressure pump can be set to pressurize the clean water and inject it into the tank 107 from the outlet pipe 102. The clean water passes through each filter element 2 in sequence and is discharged from the sewage pipe 104. Thus, the pre-filter 1 is self-cleaned by backwashing each filter element 2 with clean water.

[0020] In the aforementioned pre-filter 1, the fixed ring 103 and its isolation mesh 202, the movable ring 203 and its isolation mesh 202, and the connecting sleeve 204 together form an inner cavity. The inner cavity is filled with filter media, which can be selected according to the remaining dirt in the seawater to be purified. The connecting sleeve 204 can be made of fluororubber. When the filter element 2 filters seawater, the seawater passes sequentially through the isolation mesh 202 on the movable ring 203 and the fixed ring 201. During this process, the filter media filters out impurities from the seawater. At this time, under the action of the elastic force of the elastic element, the movable ring 203 moves closer to the fixed ring 201, and at the same time, in conjunction with the limiting force of the inner wall of the tank 107, they jointly compress the filter media, keeping the filter media in a compressed state. After the filter media is compressed, the pore distribution becomes more uniform and dense, enhancing its ability to intercept fine impurities and improving filtration efficiency. When the filter element 2 is self-cleaned, clean water passes sequentially through the isolation net 202 on the fixed ring 201 and the movable ring 203. Under the action of water pressure, the movable ring 203 is pushed away from the fixed ring 201, increasing the distance between them and making the filter media loose. After the filter media is loosened, the gaps between the particles increase, allowing the water flow to penetrate deeper into the filter media layer, flushing out the impurities trapped in the gaps of the filter media when it was compressed, preventing impurity residue, improving the self-cleaning effect of the filter element 2, thereby improving the filtration effect of the pre-filter 1, and ultimately improving the performance of the seawater desalination equipment.

[0021] Further improvements include, for example Figure 5 and 6As shown, the elastic element includes a guide rod 205 fixedly connected to the fixed ring 201 and a guide sleeve 208 fixedly connected to the movable ring 203. The guide sleeve 208 and the guide rod 205 are slidably connected, and a spring 206 is provided between the guide rod 205 and the movable ring 203. The guide sleeve 208 and the guide rod 205 cooperate with each other to support and guide the movable ring 203, improving the stability of the movement of the movable ring 203. The elastic force of the spring 206 pulls the movable ring 203 and the guide rod 205 closer together, so that the filter material is in a compressed state when the filter element 2 is in normal use, and the movable ring 203 can be reset after the filter element 2 has finished self-cleaning.

[0022] Further improvements include, for example Figure 6 As shown, both ends of the guide sleeve 208 are chamfered circumferentially, forming circumferentially distributed cutting edges 209 at both ends of the guide sleeve 208. The cutting edges 209 can clean off the dirt adhering to the guide rod 205 when the guide sleeve 208 slides, thereby keeping the surface of the guide rod 205 clean and reducing the resistance to sliding of the guide sleeve 208.

[0023] Further improvements include, for example Figure 6 As shown, a support strip 207 is fixedly connected to the inner side of the movable ring 203. The support strip 207 can support the isolation net 202 on the movable ring 203, so that the isolation net 202 can better bear the weight of the filter media and withstand the water pressure during backwashing, reducing the probability of damage to the isolation net 202 on the movable ring 203.

[0024] Further improvements include, for example Figure 6 As shown, the cross-section of the support bar 207 is a V-shaped structure with the opening facing outwards. The V-shaped structure of the support bar 207 can first enhance its own structural strength and improve the support effect on the isolation net 202; secondly, it can increase the thrust generated on the support bar 207 when the water flows downwards along the tank 107, making it easier for the water flow to push the movable ring 203 downwards during reverse flushing.

[0025] Further improvements include, for example Figure 3 and 4As shown, the inner cavity of the tank 107 includes a plurality of cylindrical mounting sections 105 that are coaxially connected in sequence along its own axial direction. The inner diameter of each mounting section 105 decreases sequentially in the vertical direction, so that the top of the mounting section 105 forms a stepped portion 106. The top of the tank 107 is open, and the sealing cover is provided with a top cover 101. A sealing ring is provided between the fixing ring 201 and the stepped portion 106. In the vertical direction, the guide rod 205 on the previous fixing ring 201 abuts against the next fixing ring 201. The uppermost fixing ring 201 is detachably connected to the stepped portion 106. The uppermost fixing ring 201 is fixedly connected to the step portion 106 by bolts. The guide rods 205 on each fixing ring 201 press the fixing ring 201 below it into the step portion 106 in sequence. Thus, when only one fixing ring 201 is bolted, all fixing rings 201 can be fixed. Furthermore, the uppermost fixing ring 201 is shallow, making it easier to tighten the bolts. This greatly improves the ease of installation of each filter element 2 and the ease of maintenance of the pre-filter 1.

[0026] Further improvements include, for example Figure 3 As shown, the movable ring 203 is slidably and sealingly connected to the inner wall of the mounting section 105, and the guide rod 205 is slidably and sealingly connected to the guide sleeve 208. Both the movable ring 203 and the guide sleeve 208 are equipped with sealing rings to achieve a seal. After sealing, the movable ring 203, the fixed ring 201, the inner wall of the mounting section 105, and the connecting sleeve 204 form a sealed space, preventing seawater from entering. This protects the spring 206 and the guide rod 205 located between the movable ring 203 and the fixed ring 201, slowing down their corrosion by seawater and extending the service life of the equipment.

[0027] Further improvements include, for example Figure 1 As shown, it also includes a chemical dosing tank 3, a sludge tank 4, a clean water tank 5, and a membrane chamber 6. The outlet pipe 102 of the pre-filter 1 is connected to the inlet of the membrane chamber 6, the outlet of the membrane chamber 6 is connected to the clean water tank 5, the drain pipe 104 of the pre-filter 1 is connected to the sludge tank 4, and the inlet pipe 103 of the pre-filter 1 is connected to the chemical dosing tank 3.

[0028] In this seawater desalination equipment, the dosing tank 3 stores flocculant. Mixing the flocculant with seawater accelerates the coagulation of impurities in the seawater. The seawater is then sent to the pre-filter 1 to improve the filtration effect of the pre-filter 1. The membrane chamber 6 is equipped with a reverse osmosis membrane. The filtered seawater enters the membrane chamber 6 for desalination, and the desalinated water is stored in the clear water tank 5. The sludge tank 4 is used to store the brine produced after the seawater is desalinated in the membrane chamber 6, as well as the wastewater produced after the pre-filter 1 self-cleansing. Through the coordinated use of these components, the seawater desalination equipment can operate normally.

[0029] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A seawater desalination device for boats, comprising a pre-filter (1), characterized in that: The pre-filter (1) includes a tank (107), with an outlet pipe (102) at the top of the tank (107), an inlet pipe (103) and a drain pipe (104) at the bottom of the tank (107), and multiple filter elements (2) arranged vertically inside the tank (107). The filter element (2) includes a fixed ring (201) that is sealed and fixed to the tank (107). A movable ring (203) is slidably disposed directly below the fixed ring (201). The movable ring (203) is connected to the fixed ring (201) through an elastic element. A flexible connecting sleeve (204) is disposed between the fixed ring (201) and the movable ring (203). An isolation net (202) is disposed on the inner side of both the fixed ring (201) and the movable ring (203). The fixed ring (201), the movable ring (203) and the connecting sleeve (204) enclose and form an inner cavity for accommodating filter media.

2. The apparatus for desalination of seawater for boats and ships according to claim 1, characterized in that, The elastic element includes a guide rod (205) fixedly connected to the fixed ring (201) and a guide sleeve (208) fixedly connected to the movable ring (203). The guide sleeve (208) is slidably engaged with the guide rod (205), and a spring (206) is provided between the guide rod (205) and the movable ring (203).

3. The apparatus according to claim 2, wherein Both ends of the guide sleeve (208) are chamfered in the circumferential direction, so that both ends of the guide sleeve (208) form circumferentially distributed cutting edges (209).

4. The seawater desalination equipment for ships according to claim 1, characterized in that, A support bar (207) is fixedly connected to the inner side of the movable ring (203).

5. The apparatus according to claim 4, wherein The cross-section of the support bar (207) is a V-shaped structure with the opening facing outwards.

6. The apparatus for desalination of seawater for boats and ships according to claim 2, characterized in that, The inner cavity of the tank (107) includes a plurality of cylindrical mounting sections (105) that are coaxially connected in sequence along its own axis. The inner diameter of each mounting section (105) decreases sequentially in the vertical direction, so that the top of the mounting section (105) forms a stepped portion (106). The top of the tank (107) is open and the sealing cover is provided with a top cover (101). The fixing ring (201) is sealed and abuts against the stepped portion (106). In the vertical direction, the guide rod (205) on the previous fixing ring (201) abuts against the next fixing ring (201). The uppermost fixing ring (201) is detachably connected to the stepped portion (106).

7. The boat water desalination apparatus according to claim 6, characterized by, The movable ring (203) is slidably and sealed to the inner wall of the mounting section (105), and the guide rod (205) is slidably and sealed to the guide sleeve (208).

8. The boat water desalination apparatus according to claim 7, characterized by, It also includes a dosing tank (3), a sludge tank (4), a clean water tank (5), and a membrane chamber (6). The outlet pipe (102) of the pre-filter (1) is connected to the inlet of the membrane chamber (6), the outlet of the membrane chamber (6) is connected to the clean water tank (5), the drain pipe (104) of the pre-filter (1) is connected to the sludge tank (4), and the inlet pipe (103) of the pre-filter (1) is connected to the dosing tank (3).

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