An air flotation pretreatment device for seawater desalination

Abstract

The present invention belongs to the technical field of air flotation pretreatment for seawater desalination, and specifically relates to an air flotation pretreatment device for seawater desalination, which includes a water distribution tank and an air flotation mechanism. A first water tank and a second water tank are respectively arranged in the water distribution tank. The first water tank and the second water tank are both connected to a water pipe, and a water pump is installed on the water pipe. The water pump is fixedly installed on the edge of the water distribution tank. An interception mechanism is arranged between the first water tank and the second water tank. The interception mechanism includes a frame, the frame is installed between the first water tank and the second water tank, and a number of groups of partition bars are installed equidistantly in the frame; the seawater is filtered by a number of groups of partition bars, so that floating garbage and marine organisms are intercepted in the first water tank, thus avoiding the inflow of garbage and marine organisms into the subsequent processes, not only reducing the seawater treatment load at the back end, but also avoiding the death of marine organisms, achieving the purpose of saving marine resources.

Description

Technical Field

[0001] The present invention belongs to the technical field of air flotation pretreatment for seawater desalination, and specifically relates to an air flotation pretreatment device for seawater desalination. Background Art

[0002] Seawater desalination is a technology that removes salts and other impurities from seawater to meet the standards of drinking water or industrial water. When removing other impurities in seawater, the air flotation process is generally used for treatment, and air flotation tanks are mostly used in the prior art.

[0003] The patent with publication number CN111747580A discloses an air flotation pretreatment system for seawater desalination, which includes a seawater intake pump connected to a distribution well. Multiple sets of devices composed of fast and slow mixing tanks and an air flotation tank are arranged around the distribution well. The bottom of the air flotation tank is connected to a sludge treatment system; in this solution, the dirt in seawater forms particulate matter through the fast and slow mixing tanks, and then the particulate matter is mixed with the air-saturated water in the air flotation tank. The tiny bubbles dissolved in the water will adhere to the particulate matter in the seawater, causing the particulate matter to float to the water surface together. The scum is collected by the skimmer at the top of the air flotation tank and discharged to the sludge treatment system through the scum discharge port. The treatment efficiency is high, the floor area is small, and the cost is reduced.

[0004] In the above solution, since there is not only a large amount of garbage floating on the seawater, but also a large number of micro and small marine organisms living in the seawater. If the seawater is directly pumped into the distribution well through the seawater intake pump, a large amount of garbage and marine organisms may be pumped into the distribution well, which will not only increase the subsequent seawater treatment load, but also cause the death of marine organisms during the subsequent seawater treatment, resulting in the waste of marine resources; for this reason, the present invention provides an air flotation pretreatment device for seawater desalination. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: An air flotation pretreatment device for seawater desalination according to the present invention includes a distribution pool and an air flotation mechanism. A first water tank and a second water tank are respectively arranged in the distribution pool. Both the first water tank and the second water tank are connected to a water pipe, and a water pump is installed on the water pipe. The water pump is fixedly installed on the edge of the distribution pool. An interception mechanism is arranged between the first water tank and the second water tank. The interception mechanism includes a frame, the frame is installed between the first water tank and the second water tank, and a number of groups of partitions are equidistantly installed in the frame;

[0007] The seawater is filtered through several groups of partition fences, so that floating garbage and marine organisms are intercepted in the first water tank, thus avoiding the inflow of garbage and marine organisms into the subsequent processes. This not only reduces the seawater treatment load at the back end, but also avoids the death of marine organisms, achieving the purpose of saving marine resources.

[0008] Preferably, limiting blocks are arranged on both sides of the frame, limiting grooves are opened on both inner sides between the first water tank and the second water tank, and the limiting blocks are slidably connected to the limiting grooves;

[0009] The cooperation between the limiting blocks and the limiting grooves enables the device to be installed and disassembled by plugging and unplugging, facilitating the maintenance of the device by the staff.

[0010] Preferably, the intercepting mechanism further includes two groups of transmission shafts rotatably installed in the frame. Sprockets are installed in the middle of the two groups of transmission shafts. A chain meshes with the two groups of sprockets. Several fixing members are distributed around the outer circle of the chain. The fixing members are fixedly connected to the chain. Several rake claws are respectively fixedly connected to several fixing members. The upper end of the receiving bar is connected to the partition fence. The lower end of the receiving bar faces the conveying mechanism. The chain, sprockets, transmission shafts, and several fixing members are all located in the structure composed of several groups of partition fences. The rake claws are inserted into the gaps between several groups of partition fences. A feeding port is opened on the side of the conveying mechanism. The lower end of the receiving bar passes through the feeding port. The conveying mechanism is fixedly installed on the second water tank;

[0011] Several groups of rake claws perform circular motion. The rake claws will pick up the garbage floating near the partition fence, and the garbage will be thrown onto the receiving bar by the rake claws. The garbage will slide along the receiving bar onto the conveying mechanism and be conveyed away by the conveying mechanism. Then, the rake claws pass through the gaps on the receiving bar and repeat the above operations in a cycle. This not only avoids the blockage of the gaps between the partition fences by garbage, but also realizes the cleaning of garbage, ensuring the passing rate of seawater through the partition fences.

[0012] Preferably, the fixing member includes a fixing sleeve fixedly installed on the chain, a rotary pipe rotatably installed in the fixing sleeve, a rotary joint ring sleeved on the rotary pipe, the rotary joint ring fixedly connected to the rake claw, a movable shaft movably inserted into the rotary pipe, rectangular shafts connected to both ends of the movable shaft, rectangular slots opened at both ends of the fixing sleeve, the rectangular shafts movably inserted into the rectangular slots, two spiral grooves opened on the rotary pipe, two pin shafts arranged on the movable shaft, the two pin shafts respectively located in the two spiral grooves, two guiding rings symmetrically arranged on both sides of the chain, the two ends of the guiding rings respectively fixedly connected to the two transmission shafts, rollers rotatably installed at the ends of the rectangular shafts, the rollers rotatably connected to the guiding rings, and a convex section for pushing the rollers arranged on the guiding rings;

[0013] The rectangular shaft drives two groups of pin shafts to respectively extrude the walls of two groups of spiral grooves, causing the rotary connection pipe, together with the rotary connection ring and the rake claws, to rotate, indicating the direction, and causing the rake claws to rotate into the structure of several groups of partition fences. At this time, the feeding port opened on the side of the conveying mechanism can be directly arranged close to the partition fences, and the garbage thrown from the rake claws will directly fall onto the conveying mechanism, not only streamlining the receiving fence, making the device structure more compact, but also improving the garbage conveying efficiency and the practicality of the device.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The seawater is filtered by several groups of partition fences, so that floating garbage and marine organisms are intercepted in the first water tank, thereby preventing the garbage and marine organisms from flowing into the subsequent processes, not only reducing the load of seawater treatment at the back end, but also avoiding the death of marine organisms, achieving the purpose of saving marine resources.

[0016] 2. During the process of filtering seawater by several groups of partition fences, the conveying mechanism is started, and at the same time, a driving shaft is driven to rotate by a motor. A group of driving shafts drives the corresponding sprockets to rotate, and the sprockets drive the chain together with several groups of fixing parts and several groups of rake claws to make a circular motion. As the several groups of rake claws make a circular motion, the rake claws will pick up the garbage floating near the partition fences, and the garbage will be thrown by the rake claws onto the receiving fence. The garbage will slide along the receiving fence onto the conveying mechanism, and the garbage is conveyed away by the conveying mechanism. Then, the rake claws pass through the gaps on the receiving fence and repeat the above operations in a cycle, thereby not only preventing the garbage from blocking the gaps between the partition fences, but also realizing the cleaning of the garbage and ensuring the passing rate of seawater by the partition fences.

[0017] 3. During the circular motion of several groups of fixing parts and several groups of rake claws, the rollers on the fixing parts will roll along the guiding ring. When the rake claws throw the garbage downward, the fixing parts will move between the raised sections on the two guiding rings. At this time, a group of rollers are extruded by a group of raised sections, causing a group of rollers to drive the corresponding rectangular shaft to slide along the rectangular slot, and at the same time, the rectangular shaft drives the movable shaft together with another group of rectangular shafts to move, and the rectangular shaft drives two groups of pin shafts to respectively extrude the walls of two groups of spiral grooves, causing the rotary connection pipe, together with the rotary connection ring and the rake claws, to rotate, and causing the rake claws to rotate into the structure of several groups of partition fences. At this time, the feeding port opened on the side of the conveying mechanism can be directly arranged close to the partition fences, and the garbage thrown from the rake claws will directly fall onto the conveying mechanism, not only streamlining the receiving fence, making the device structure more compact, but also improving the garbage conveying efficiency and the practicality of the device. Brief Description of the Drawings

[0018] The present invention will be further described below with reference to the drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a partial schematic diagram of the interception mechanism of the present invention.

[0021] Figure 3 This is an overall schematic diagram of the interception mechanism of the present invention.

[0022] Figure 4 This is an overall sectional schematic diagram of the interception mechanism of the present invention.

[0023] Figure 5 This is a combined schematic diagram of the partition, rake claws, and receiving bar of the present invention.

[0024] Figure 6 This is a combined schematic diagram of the chain, fixing member, and rake claws of the present invention.

[0025] Figure 7 This is a sectional schematic diagram of the fixing member of the present invention.

[0026] Figure 8 This is a combined schematic diagram of the transmission shaft, chain, and fixing member of the present invention.

[0027] Figure 9 This is a combined schematic diagram of the chain, fixing member, rake claws, and guiding ring of the present invention.

[0028] Figure 10 This is a combined schematic diagram of the partition, rake claws, and conveying mechanism of the present invention.

[0029] In the figure: 1, water distribution tank; 2, first water trough; 3, second water trough; 32, limit groove; 4, water pipe; 5, water pump; 6, interception mechanism; 601, frame; 602, partition; 603, limit block; 604, transmission shaft; 6041, guiding ring; 6042, raised section; 605, sprocket; 606, chain; 607, fixing member; 608, rake claws; 609, receiving bar; 610, conveying mechanism; 6101, feeding port; 6071, fixing sleeve; 711, rectangular slot; 6072, swivel pipe; 721, spiral groove; 6073, swivel ring; 6074, movable shaft; 741, pin shaft; 6075, rectangular shaft; 751, roller. Detailed implementation manners

[0030] In order to make the technical means, creative features, achieved purposes, and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners. Embodiment 1

[0031] As Figure 1 And Figure 2As shown in the figure, a seawater desalination air flotation pretreatment device according to an embodiment of the present invention includes a mixing tank 1 and an air flotation mechanism 7. A first water tank 2 and a second water tank 3 are respectively arranged in the mixing tank 1. The first water tank 2 and the second water tank 3 are both connected to a water pipe 4. A water pump 5 is installed on the water pipe 4. The water pump 5 is fixedly installed on the edge of the mixing tank 1. An interception mechanism 6 is arranged between the first water tank 2 and the second water tank 3. The interception mechanism 6 includes a frame 601. The frame 601 is installed between the first water tank 2 and the second water tank 3. A number of groups of partition bars 602 are installed at equal intervals in the frame 601.

[0032] Specifically, the air flotation mechanism 7 uses the horizontal flow air flotation process to treat seawater. The air flotation mechanism 7 is provided with fast and slow mixing tanks and an air flotation tank. The tank body of the air flotation tank is of steel-concrete structure. There are gaps between a number of groups of partition bars 602. The water pipe 4 connected to the first water tank 2 leads to the sea, and the water pipe 4 connected to the second water tank 3 leads to the fast mixing tank in the air flotation mechanism 7. When it is necessary to perform air flotation process treatment on seawater, the water pump 5 on the first water tank 2 is started. The water pump 5 pumps seawater into the first water tank 2 through the corresponding water pipe 4. Then the seawater in the first water tank 2 flows into the second water tank 3 through the gaps between a number of groups of partition bars 602. A number of groups of partition bars 602 block floating garbage and marine organisms to prevent the garbage and marine organisms from entering the second water tank 3. Then the water pump 5 on the second water tank 3 is started. The water pump 5 pumps the seawater in the second water tank 3 into the air flotation mechanism 7 through the corresponding water pipe 4 for the next air flotation treatment, so as to realize the air flotation pretreatment of seawater. Compared with the prior art, the seawater is filtered by a number of groups of partition bars 602, so that the floating garbage and marine organisms are intercepted in the first water tank 2, thus preventing the garbage and marine organisms from flowing into the subsequent processes, not only reducing the treatment load of seawater at the back end, but also avoiding the death of marine organisms, achieving the purpose of saving marine resources.

[0033] Furthermore, limiting blocks 603 are arranged on both sides of the frame 601. Limiting grooves 32 are opened on both inner sides between the first water tank 2 and the second water tank 3. The limiting blocks 603 are slidably connected to the limiting grooves 32.

[0034] Specifically, the cooperation between the limiting blocks 603 and the limiting grooves 32 enables the device to be installed and disassembled by plugging and unplugging, which is convenient for the staff to repair the device.

[0035] Such as Figures 3 to 5As shown in the figure, the interception mechanism 6 further includes two groups of transmission shafts 604 rotatably installed in the frame 601. Sprockets 605 are installed in the middle of the two groups of transmission shafts 604. A chain 606 meshes with the two groups of sprockets 605. A number of fixing members 607 are distributed around the outer ring of the chain 606. The fixing members 607 are fixedly connected to the chain 606. A number of rake claws 608 are respectively fixedly connected to the number of fixing members 607. The upper end of the receiving bar 609 is connected to the partition bar 602. The lower end of the receiving bar 609 faces the transmission mechanism 610. The chain 606, sprockets 605, transmission shafts 604, and a number of fixing members 607 are all located in the structure formed by a number of partition bars 602. The rake claws 608 are inserted into the gaps between the number of partition bars 602. A feeding port 6101 is provided on the side of the transmission mechanism 610. The lower end of the receiving bar 609 passes through the feeding port 6101. The transmission mechanism 610 is fixedly installed on the second water tank 3.

[0036] Specifically, the transmission mechanism 610 adopts a conveyor belt conveyor in the prior art. After a number of partition bars 602 intercept floating garbage for a long time, the gaps between the partition bars 602 will not only be blocked by garbage, affecting the passage of seawater, but also the garbage retained in the first water tank 2 will increase, making it time-consuming and laborious to clean and salvage.

[0037] Therefore, during the process of filtering seawater by a number of partition bars 602, the transmission mechanism 610 is started, and at the same time, a group of transmission shafts 604 are driven to rotate by a motor. A group of transmission shafts 604 drive the corresponding sprockets 605 to rotate. The sprockets 605 drive the chain 606 together with a number of fixing members 607 and a number of rake claws 608 to perform a circular motion. The arrow in the figure below indicates the direction of the circular motion. As the number of rake claws 608 performs a circular motion, the rake claws 608 will pick up the garbage floating near the partition bars 602, and the garbage will be thrown onto the receiving bar 609 by the rake claws 608. The garbage will slide along the receiving bar 609 onto the transmission mechanism 610 and be conveyed away by the transmission mechanism 610. Then, the rake claws 608 pass through the gaps on the receiving bar 609, and the above operations are repeated cyclically, thereby not only avoiding the blockage of the gaps between the partition bars 602 by garbage, but also realizing the cleaning of the garbage and ensuring the seawater passing rate of the partition bars 602. Figure 3 In the figure below, the arrow indicates the direction of the circular motion. As the number of rake claws 608 performs a circular motion, the rake claws 608 will pick up the garbage floating near the partition bars 602, and the garbage will be thrown onto the receiving bar 609 by the rake claws 608. The garbage will slide along the receiving bar 609 onto the transmission mechanism 610 and be conveyed away by the transmission mechanism 610. Then, the rake claws 608 pass through the gaps on the receiving bar 609, and the above operations are repeated cyclically, thereby not only avoiding the blockage of the gaps between the partition bars 602 by garbage, but also realizing the cleaning of the garbage and ensuring the seawater passing rate of the partition bars 602. Embodiment 2

[0038] As Figures 6 to 10As shown, compared with the first comparative example, another implementation manner of the present invention is as follows: The fixing member 607 includes a fixing sleeve 6071, the fixing sleeve 6071 is fixedly installed on the chain 606, a rotating pipe 6072 rotatably installed in the fixing sleeve 6071, a rotating ring 6073 of the fixing sleeve 6071 installed on the rotating pipe 6072, the rotating ring 6073 is fixedly connected to the rake claw 608, a movable shaft 6074 movably inserted into the rotating pipe 6072, rectangular shafts 6075 are connected to both ends of the movable shaft 6074, rectangular slots 711 are opened at both ends of the fixing sleeve 6071, the rectangular shafts 6075 are movably inserted into the rectangular slots 711, two groups of spiral grooves 721 are opened on the rotating pipe 6072, two groups of pin shafts 741 are arranged on the movable shaft 6074, and the two groups of pin shafts 741 are respectively located in the two groups of spiral grooves 721. Two groups of guiding rings 6041 are symmetrically arranged on both sides of the chain 606, both ends of the guiding ring 6041 are respectively fixedly connected to two groups of transmission shafts 604, a roller 751 is rotatably installed at the end of the rectangular shaft 6075, the roller 751 is rotatably connected to the guiding ring 6041, and a protruding section 6042 for pushing the roller 751 is arranged on the guiding ring 6041.

[0039] Specifically, there are many types of garbage floating on the sea. When the rake claw 608 picks up garbage such as a plastic convenience bag, after the plastic convenience bag has been soaked in water, the mass of the plastic convenience bag becomes larger. After the plastic convenience bag is thrown onto the receiving bar 609, the friction between the plastic convenience bag and the receiving bar 609 will be very large, making it impossible for the plastic convenience bag to slide onto the conveying mechanism 610. The plastic convenience bag will hinder other garbage from detaching from the receiving bar 609. Over time, a large amount of garbage will accumulate on the receiving bar 609, reducing the practicability of the device.

[0040] Therefore, during the circular motion of several groups of fixing members 607 and several groups of rake claws 608, the rollers 751 on the fixing members 607 will roll along the guiding rings 6041. When the rake claw 608 throws the garbage downward, the fixing member 607 will move between the protruding sections 6042 of the two groups of guiding rings 6041. At this time, one group of rollers 751 is squeezed by one group of protruding sections 6042, causing one group of rollers 751 to drive the corresponding rectangular shaft 6075 to slide along the rectangular slot 711. At the same time, the rectangular shaft 6075 drives the movable shaft 6074 together with the other group of rectangular shafts 6075 to move, and the rectangular shaft 6075 drives the two groups of pin shafts 741 to respectively squeeze the walls of the two groups of spiral grooves 721, causing the rotating pipe 6072 together with the rotating ring 6073 and the rake claw 608 to rotate, and the rotation direction is as follows Figure 10The middle arrow indicates the direction, which causes the rake claw 608 to rotate into a structure composed of several groups of partition bars 602. At this time, the feed port 6101 opened on the side of the conveying mechanism 610 can be directly set close to the partition bar 602, and the garbage thrown from the rake claw 608 will fall directly onto the conveying mechanism 610 until the rake claw 608 is offset from the conveying mechanism 610, and another group of rollers 751 is squeezed by another group of raised sections 6042. Similarly, the rake claw 608 will be flipped out of the structure composed of several groups of partition bars 602, and then the above operation is repeated in a cycle. Since the garbage can fall directly onto the conveying mechanism 610, not only the receiving bar 609 is streamlined to make the device structure more compact, but also the garbage conveying efficiency is improved, thereby improving the practicability of the device.

[0041] Working principle: start the water pump 5 on the first water tank 2, and the water pump 5 pumps seawater into the first water tank 2 through the corresponding water pipe 4, and then the seawater in the first water tank 2 flows into the second water tank 3 through the gaps between the plurality of groups of fences 602, and the plurality of groups of fences 602 block the floating garbage and marine life to prevent the garbage and marine life from entering the second water tank 3, and then start the water pump 5 on the second water tank 3, and the water pump 5 pumps the seawater in the second water tank 3 into the flotation mechanism 7 through the corresponding water pipe 4 for the next step of processing, thereby realizing the flotation pretreatment of seawater;

[0042] When the plurality of fences 602 are filtering the seawater, the transmission mechanism 610 is started, and at the same time, a group of transmission shafts 604 are driven by the motor to rotate, and a group of transmission shafts 604 drives the corresponding sprockets 605 to rotate, and the sprockets 605 drive the chains 606 together with the plurality of fixing parts 607 and the plurality of rake claws 608 to make circular motions. Figure 3 The direction indicated by the middle arrow is the circular motion direction. As the plurality of groups of rake claws 608 make circular motions, the rake claws 608 will pick up the garbage floating near the partition 602, and the garbage will be thrown onto the receiving bar 609 by the rake claws 608. The garbage will slide along the receiving bar 609 to the conveying mechanism 610, and the garbage will be conveyed away by the conveying mechanism 610. Then the rake claws 608 pass through the gap on the receiving bar 609, and the above operation will be repeated in a cycle.

[0043] When the plurality of sets of fixing members 607 and the plurality of sets of rake claws 608 make circular motions, the rollers 751 on the fixing members 607 will roll against the guide rings 6041. When the rake claws 608 throw the garbage downward, the fixing members 607 will move between the raised sections 6042 on the two sets of guide rings 6041. At this time, a set of rollers 751 is squeezed by a set of raised sections 6042, so that a set of rollers 751 drives the corresponding rectangular shafts 6075 to slide along the rectangular slots 711. At the same time, the rectangular shafts 6075 drive the movable shafts 6074 to move together with the other set of rectangular shafts 6075. The rectangular shafts 6075 drive the two sets of pins 741 to squeeze the groove walls of the two sets of spiral grooves 721 respectively, so that the rotating tubes 6072, the rotating rings 6073 and the rake claws 608 rotate together. The rotation direction is downward. Figure 10 The middle arrow indicates the direction, which causes the rake claw 608 to rotate into a structure composed of several groups of partition bars 602. At this time, the feed port 6101 opened on the side of the conveying mechanism 610 can be directly set close to the partition bars 602, and the garbage thrown from the rake claw 608 will fall directly onto the conveying mechanism 610 until the rake claw 608 is offset from the conveying mechanism 610, and another group of rollers 751 is squeezed by another group of raised sections 6042. Similarly, the rake claw 608 will flip out from the structure composed of several groups of partition bars 602, and then the above operation will be repeated in a cycle.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A seawater desalination air flotation pretreatment device, comprising a water distribution tank and an air flotation mechanism, characterized in that: A first water tank and a second water tank are respectively arranged in the water distribution tank. Water pipes are connected to both the first water tank and the second water tank. A water pump is installed on the water pipe, and the water pump is fixedly installed on the edge of the water distribution tank. An intercepting mechanism is arranged between the first water tank and the second water tank; The intercepting mechanism includes: A frame, which is installed between the first water tank and the second water tank; A number of groups of partition bars are installed at equal intervals inside the frame; The intercepting mechanism further includes: Two groups of transmission shafts, which are rotatably installed inside the frame; Sprockets are installed in the middle of the two groups of transmission shafts; A chain, which meshes with the two groups of sprockets; A number of groups of fixing members are distributed around the outer ring of the chain, and the fixing members are fixedly connected to the chain; A number of groups of rake claws, and the number of groups of rake claws are respectively fixedly connected to the number of groups of fixing members; A receiving bar, the upper end of which is connected to the partition bar; The lower end of the receiving bar faces the conveying mechanism; The chain, sprocket, transmission shaft, and a number of groups of fixing members are all located in the structure formed by the number of groups of partition bars, and the rake claws are inserted into the gaps between the number of groups of partition bars; A feeding port is opened on the side of the conveying mechanism, and the lower end of the receiving bar passes through the feeding port; The fixing member includes: A fixing sleeve, which is fixedly installed on the chain; A rotary pipe rotatably installed inside the fixing sleeve; A rotary connection ring sleeved on the rotary pipe, and the rotary connection ring is fixedly connected to the rake claw; A movable shaft movably inserted into the rotary pipe; Rectangular shafts are connected to both ends of the movable shaft; Rectangular slots are opened at both ends of the fixing sleeve, and the rectangular shafts are movably inserted into the rectangular slots; Two groups of spiral grooves are opened on the rotary pipe, and two groups of pin shafts are arranged on the movable shaft, and the two groups of pin shafts are respectively located in the two groups of spiral grooves; Two groups of guiding rings are symmetrically arranged on both sides of the chain. The two ends of the guiding ring are respectively fixedly connected to the two groups of transmission shafts. A roller is rotatably installed at the end of the rectangular shaft, the roller is rotatably connected to the guiding ring, and a convex section for pushing the roller is arranged on the guiding ring.

2. A seawater desalination air flotation pretreatment device according to claim 1, characterized in that: Limit blocks are arranged on both sides of the frame, and limit grooves are opened on both inner sides between the first water tank and the second water tank, and the limit blocks are slidably connected to the limit grooves.

3. A seawater desalination air flotation pretreatment device according to claim 1, characterized in that: The conveying mechanism is fixedly installed on the second water tank.

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