Sea water desalination impurity pretreatment equipment

Abstract

The invention belongs to the technical field of water treatment equipment, and particularly relates to seawater desalination impurity pretreatment equipment which comprises a medicament diffusion mechanism mounted on a pretreatment pool and a centripetal spraying mechanism, and the centripetal spraying mechanism settles atomized liquid medicine in air in a spraying mode; by arranging the centripetal spraying mechanism and cooperating with the medicament diffusion mechanism, when the medicament is applied, the sprayed medicament is diffused in a large area on the liquid level of pond water in a water mist form through an atomizing head and a diffusion pipe, so that the medicament is uniformly sprayed, and meanwhile, the atomized medicament in the range of a spraying ring is covered and sprayed by utilizing a centripetal spraying water curtain, so that the medicament spraying efficiency is improved. Meanwhile, due to centripetal spraying of the water curtain, water in the pesticide-containing pool is not prone to being diffused out of the pool even if the spraying ring makes contact with the edge of the pool body in the equipment movement process, and the influence of pesticide spraying on the environment outside the pool is further reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of water treatment equipment, and specifically relates to a seawater desalination impurity pretreatment device. Background Art

[0002] With the increasing shortage of fresh water resources, seawater desalination technology has become an important way to obtain fresh water in coastal areas. Before desalinating seawater, since seawater contains impurities such as mud and algae, in order to avoid hindering the subsequent membrane filtration process, it is necessary to perform pre-treatment on seawater.

[0003] When pre-treating seawater, it usually needs to go through processes such as coarse filtration, fine filtration, sedimentation, and disinfection. In the sedimentation and disinfection processes, it is necessary to spray flocculants or disinfectants into the seawater in sedimentation tanks and disinfection tanks, and cooperate with steps such as mixing and stirring, so that the flocculants or disinfectants perform flocculation sedimentation or disinfection and sterilization on the water in the tanks. When spraying flocculants or disinfectants, the flocculants or disinfectants in aerosol state can effectively enhance their dispersion uniformity on the water surface. However, this method is extremely vulnerable to the influence of wind and spreads to the surrounding environment, causing damage to the environment or the staff in the environment.

[0004] In related technologies, to solve this problem, a patent for an environmentally friendly flocculating sewage treatment device with uniform chemical agent spraying was once disclosed, and its publication number is CN117756252A. In this patent, by setting a spraying mechanism, it can spray flocculants on sewage tanks of different sizes, thereby improving the application range of the device. Moreover, the discharge pipe is rotatably connected to the cylinder body, driving the cylinder body to rotate, driving the telescopic pipe, spray pipe, and elbow pipe to rotate, so that when spraying the chemical agent, it rotates and sprays, and the chemical agent is evenly sprayed into all corners of the sewage tank, avoiding less contact between local sewage and flocculants, resulting in incomplete reaction and poor flocculation effect. At the same time, the elbow pipe is bent towards the bottom plate, so that when rotating, the flocculant is always sprayed downward, thus avoiding the high distance between the flocculant and the liquid surface of the sewage tank, resulting in the flocculant being scattered by the wind during open-air treatment. However, it is found in actual application that when adding flocculants or disinfectants to the water tank, due to the influence of the tank body range, the equipment usually needs to move in the water tank to evenly apply the chemical agent in the water tank. During the movement process, it is not easy to control the distance between the equipment and the water tank. When the distance between the equipment and the edge of the water tank is relatively close and affected by the airflow in the environment, it is very easy to cause the liquid mist of flocculants or disinfectants to spread outside the water tank, affecting the environment.

[0005] In view of this, the present invention proposes a seawater desalination impurity pretreatment device to solve the above technical problems. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve the above technical problems, the present invention proposes a seawater desalination impurity pretreatment device.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A seawater desalination impurity pretreatment device according to the present invention includes a chemical agent diffusion mechanism installed on a pretreatment tank. The chemical agent diffusion mechanism includes a floating seat, a chemical agent tank, a booster pump, and a diffusion pipe. The booster pump is fixedly installed on the floating seat. The input end of the booster pump extends below the floating seat, and a confluence plate is installed at the output end of the booster pump. The chemical agent tank is installed above the confluence plate, and both the chemical agent tank and the output end of the booster pump are connected to the confluence plate in a conducting manner. The diffusion pipe is installed on the confluence plate, and the diffusion pipes are evenly arranged along the circumferential direction of the confluence plate. The diffusion pipe is provided with evenly distributed atomizing heads, and the axis of the atomizing head is parallel to the water surface. It further includes a centripetal spraying mechanism, which settles the atomized liquid medicine in the air by spraying. The centripetal spraying mechanism includes a spraying ring. The spraying ring is located outside the floating seat. The output end of the booster pump is designed as a multi-head tubular structure, and the output end of the booster pump is connected to the spraying ring in a conducting manner. The spraying ring is installed with evenly distributed spraying heads. The spraying heads are all inclined upward, and the inclined directions of the spraying heads all face the axial direction of the floating seat.

[0008] Preferably, the confluence plate is composed of a support seat and a rotating ring. The support seat is fixedly installed between the booster pump and the chemical agent tank. The rotating ring is rotatably installed on the support seat. The atomizing heads are all located on the same side of the diffusion pipe, and the opening directions of the atomizing heads on multiple diffusion pipes are the same in the circumferential direction.

[0009] Preferably, a blending cavity is provided on the support seat. A ring groove is formed between the rotating ring and the support seat. The blending cavity is connected to the ring groove in a conducting manner. Both the chemical agent tank and the output end of the booster pump are connected to the blending cavity in a conducting manner.

[0010] Preferably, a flow-limiting pipe is fixedly installed at the bottom end of the chemical agent tank. The flow-limiting pipe extends into the blending cavity. A metering wheel is rotatably installed in the flow-limiting pipe. The metering wheel is a wheel-shaped structure with evenly distributed slots in the circumferential direction. The bottom end of the metering wheel extends into the blending cavity.

[0011] Preferably, extension plates are installed on multiple diffusion pipes. The extension plates are cavity-type structures, and the inner cavity of the extension plates is connected to the output end of the booster pump in a conducting manner. The extension plates correspond to the diffusion pipes one by one. The extension plates are located above the diffusion pipes, and evenly distributed spraying holes are provided at the bottom of the extension plates, i.e., on the side away from the rotation direction.

[0012] Preferably, a floating disk is sleeved on the floating seat. The floating disk extends below the confluence plate. The floating disk is a conical structure, and the floating disk covers the floating seat.

[0013] Preferably, the floating plate and the floating seat are elastically connected by a spring, the bottom end of the floating plate is always below the liquid surface, a receiving plate is fixedly sleeved on the medicine tank, a drainage groove is opened at the bottom end of the receiving plate, a baffle is fixedly installed on the extension plate, the baffle is used to block the drainage groove, and the drainage groove is periodically opened during the rotation of the diffuser tube.

[0014] Preferably, the centripetal spray mechanism further comprises a positioning tube, which is a telescopic hollow tubular structure, and the positioning tube is used to connect the spray ring and the floating seat, and the output end of the booster pump is conductively connected to the spray ring through the positioning tube.

[0015] Preferably, the spray heads are all conductively connected to the spray ring via a bellows, a bracket is fixedly mounted on the spray ring, and the tail end of the spray head is hingedly mounted on the bracket.

[0016] Preferably, an offset groove is provided on the floating seat, an eccentric wheel with a top opening is fixedly mounted on the positioning tube, a butt joint pipe is mounted on the floating seat, the butt joint pipe is conductively connected to the output end of the booster pump, the eccentric wheel is elastically mounted in the offset groove by a spring, and in an initial state, the butt joint pipe is aligned and conductively connected with the top opening of the eccentric wheel.

[0017] The beneficial effects of the present invention are as follows: 1. The seawater desalination impurity pretreatment equipment described in the present invention is provided with a centripetal spray mechanism and a reagent diffusion mechanism. When applying the reagent, the sprayed reagent is diffused over a large area on the pool water surface in the form of water mist through the atomizing head and the diffusion tube, so that the reagent is sprayed more evenly. At the same time, the atomized reagent within the spray ring range is covered and sprayed by the water curtain of the centripetal spray, thereby limiting the diffusion range of the reagent. At the same time, due to the centripetal spraying of the water curtain, during the movement of the equipment, even when the spray ring contacts the edge of the pool body, the pool water containing the reagent is not easy to diffuse outside the pool, thereby further reducing the impact of the reagent spraying on the environment outside the pool.

[0018] 2. The seawater desalination impurity pretreatment equipment described in the present invention is blocked by the water pool through the spray ring, so that after the spray ring and the floating seat are relatively displaced, the butt joint pipe and the eccentric wheel opening are misaligned, thereby reducing the conduction area between the butt joint pipe and the eccentric wheel opening, and reducing the efficiency of water pumping into the spray ring. As a result, the water pressure in the bellows is reduced, and the support force of the bellows on the end of the injection head is reduced. At this time, the injection head gradually deflects downward away from the end of the spray ring, so that the upward inclination angle of the injected water flow is reduced, and the height of the formed water curtain is reduced, further reducing the probability of pool water leakage due to spraying. At the same time, the water curtain is lowered, and the difficulty of airflow or wind force to drive the injected water flow to change direction increases, further reducing the probability of pool water leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 is the overall three-dimensional view of the present invention; Figure 2 is the partial three-dimensional view of the medicament diffusion mechanism; Figure 3 is the installation schematic diagram of the diffusion tube and the extension plate; Figure 4 is the cross-sectional view of the confluence plate, the extension plate and the diffusion tube; Figure 5 is Figure 4 the partial enlarged view at A in Figure 6 is Figure 5 the partial cross-sectional view at B-B in Figure 7 is the cross-sectional view of the floating seat and the floating disc; Figure 8 is the installation schematic diagram of the eccentric wheel in the offset groove; Figure 9 is the assembled three-dimensional view of the spray ring and the spray head; Figure 10 is Figure 9 the partial enlarged view at C in In the figure: 1, floating seat; 11, medicine tank; 12, booster pump; 13, diffusion tube; 14, atomizing head; 2, spray ring; 21, spray head; 22, extension plate; 23, spray hole; 24, floating disc; 25, receiving disc; 26, drain groove; 27, baffle; 28, positioning tube; 3, support seat; 31, rotating ring; 32, blending cavity; 33, ring groove; 4, flow limiting tube; 41, metering wheel; 5, bracket; 51, corrugated pipe; 52, offset groove; 53, eccentric wheel; 54, docking pipe. Specific embodiments

[0021] 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 embodiments.

[0022] As Figures 1 to 10 shown, a seawater desalination impurity pretreatment device according to the present invention includes a medicament diffusion mechanism installed on a pretreatment tank, and the medicament diffusion mechanism includes a floating seat 1, a medicine tank 11, a booster pump 12 and a diffusion tube 13; The booster pump 12 is fixedly installed on the floating seat 1. The input end of the booster pump 12 extends below the floating seat 1. A confluence plate is installed at the output end of the booster pump 12. The booster pump 12 is used to pump seawater from the pretreatment tank. Optionally, in other embodiments of the present invention, a filter head is installed at the input end of the booster pump 12 to prevent impurities in the seawater from hindering the operation of the booster pump 12; The medicine tank 11 is installed above the confluence plate. The medicine tank 11 and the output end of the booster pump 12 are both connected to the confluence plate in a conducting manner. The confluence plate serves as a mixing place for seawater and medicine, and is used to receive the medicine and seawater pumped by the medicine tank 11 and the booster pump 12; The diffusion pipe 13 is installed on the confluence plate, and the diffusion pipes 13 are evenly arranged along the circumferential direction of the confluence plate. Uniformly distributed atomizing heads 14 are provided on the diffusion pipe 13, and the axes of the atomizing heads 14 are parallel to the water surface; It further includes a centripetal spraying mechanism, which settles the atomized liquid medicine in the air by spraying; The centripetal spraying mechanism includes a spraying ring 2. The spraying ring 2 is located outside the floating seat 1. The output end of the booster pump 12 is designed as a multi-headed tubular shape. It should be noted that a flow distributor is provided on the multi-headed pipe at the output end of the booster pump 12, which is convenient for the staff to flexibly adjust the ratio of the multi-channel pumped water flow at the output end of the booster pump 12. The output end of the booster pump 12 is connected to the spraying ring 2 in a conducting manner; Uniformly distributed spraying heads 21 are installed on the spraying ring 2. The spraying heads 21 are all inclined upward, and the inclined directions of the spraying heads 21 all face the axis of the floating seat 1. The spraying ring 2 floats on the water surface, and the outlets of the spraying heads 21 are above the water surface. When the spraying heads 21 spray water, the water is sprayed obliquely upward, and the spraying direction faces the center of the spraying ring 2. Since the spraying heads 21 on the spraying ring 2 are evenly distributed, by adjusting the input pressure of the booster pump 12, the water flows sprayed by multiple spraying heads 21 can be converged above the center of the spraying ring 2, and then an inverted bowl-shaped water curtain is formed in the pretreatment tank. It should be noted that in other embodiments of the present invention, in order to enhance the isolation effect of the water curtain, the spraying heads 21 on the spraying ring 2 are not only densely arranged along the circumferential direction of the spraying ring 2, but also arranged in multiple dense rings on the spraying ring 2, resulting in a multi-layer water curtain, thereby enhancing the isolation effect of the water curtain.

[0023] When spraying flocculant or medicine in the pretreatment tank, in order to avoid the sprayed medicine from escaping outside the pretreatment tank under the influence of environmental wind, and in order to reduce the probability of seawater and medicine diffusing outside the tank during the process of the equipment approaching the edge of the tank, the present invention provides a centripetal spraying mechanism that cooperates with the medicine diffusion mechanism, and uses the method of covering with a water curtain to limit the medicine diffusion range and the water flow movement range, and reduce the impact on the external environment during the medicine spraying process.

[0024] Specifically, when spraying chemicals into the pretreatment tank, the staff fills the pre-prepared chemicals into the medicine tank 11. Under the action of gravity, the chemicals gradually drip into the confluence plate. Subsequently, the booster pump 12 is started. The booster pump 12 continuously pumps the seawater in the tank and sends it to the confluence plate and the spray ring 2 after pressurization. During the continuous pumping of the water flow, the seawater entering the confluence plate is mixed with the chemicals and then gradually flows into the diffusion pipe 13 under the action of water pressure and gravity, and is ejected through the atomizing head 14 on the diffusion pipe 13. The ejected mixed liquid drifts above the liquid level of the pretreatment tank in the form of water mist. At the same time, with the continuous pumping of the water flow, the water pressure in the spray ring 2 increases, so that the seawater is ejected from the spray head 21. Since the spray heads 21 are densely distributed on the spray ring 2, when the spray heads 21 eject water flows, multiple water flows are ejected obliquely upward from the spray ring 2 and finally converge above the center of the spray ring 2. Since the water flow is affected by air resistance and other factors after leaving the spray head 21, the ejected water flow gradually diffuses from the aggregated form, so that some water flows drip in advance before reaching the airspace above the center of the spray ring 2. During the dripping process, the diluted and atomized chemicals are sprayed and settled, so that the diluted chemicals ejected from the atomizing head 14 are quickly washed into the pool water to reduce the probability of the water mist formed by the chemicals diffusing out of the pool.

[0025] In the present invention, by setting up a centripetal spraying mechanism and cooperating with a chemical diffusion mechanism, when applying chemicals, through the atomizing head 14 and the diffusion pipe 13, the ejected chemicals are diffused in a large area above the liquid level of the pool water in the form of water mist, so that the chemical spraying is relatively uniform. At the same time, the water curtain of centripetal spraying is used to cover and spray the atomized chemicals within the range of the spray ring 2, thereby restricting the diffusion range of the chemicals. At the same time, due to the centripetal spraying of the water curtain, even when the spray ring 2 contacts the edge of the pool body during the movement of the equipment, the chemical-containing pool water is not easily diffused out of the pool, further reducing the impact of chemical spraying on the external environment of the pool.

[0026] As a preferred embodiment of the present invention, the confluence plate is composed of a support seat 3 and a rotating ring 31. The support seat 3 is fixedly installed between the booster pump 12 and the medicine tank 11. The rotating ring 31 is rotatably installed on the support seat 3. The atomizing heads 14 are all located on the same side of the diffusion pipe 13, and the opening directions of the atomizing heads 14 on the plurality of diffusion pipes 13 are the same in the circumferential direction.

[0027] A mixing cavity 32 is formed on the support seat 3. A ring groove 33 is formed between the rotating ring 31 and the support seat 3. The mixing cavity 32 is communicated with the ring groove 33. The output ends of the medicine tank 11 and the booster pump 12 are both communicated with the mixing cavity 32.

[0028] A flow-limiting pipe 4 is fixedly installed at the bottom end of the medicine tank 11. The flow-limiting pipe 4 extends into the blending chamber 32. A metering wheel 41 is rotatably installed in the flow-limiting pipe 4. The metering wheel 41 is a wheel-shaped structure with evenly spaced slots in the circumferential direction. The bottom end of the metering wheel 41 extends into the blending chamber 32.

[0029] After the booster pump 12 pumps a part of the water flow into the blending chamber 32, the water flow flows along the blending chamber 32 into the annular groove 33. During this process, due to the directional flow of the water flow and the driving force of the metering wheel 41, the metering wheel 41 rotates. Since the metering wheel 41 has evenly spaced slots in the circumferential direction, the medicament in the medicine tank 11 flows into the flow-limiting pipe 4 under the action of gravity. During the rotation of the metering wheel 41, the medicament gradually enters the blending chamber 32 through the slots in the circumferential direction of the metering wheel 41 and is mixed with the seawater in the blending chamber 32, realizing the quantitative addition and dilution of the medicament. It should be noted that the addition rate of the medicament depends on the rotation speed of the metering wheel 41, and the rotation rate of the metering wheel 41 depends on the rate at which the booster pump 12 pumps the water flow into the blending chamber 32. Therefore, the staff can adjust the spraying rate of the medicament by adjusting the power of the booster pump 12 and coordinating the proportion of the water flow pumped into the blending chamber 32 by the booster pump 12. When the seawater-diluted medicament enters the diffusion pipe 13 and is ejected by the atomizing head 14 on one side of the diffusion pipe 13, since the opening direction of the atomizing head 14 is consistent with the circumferential direction of the floating seat 1, under the action of the reaction force of the ejected liquid mist, the diffusion pipe 13 and the rotating ring 31 rotate circumferentially along the support seat 3, further enhancing the uniformity of the medicament spraying.

[0030] As a preferred embodiment of the present invention, extension plates 22 are installed on multiple diffusion pipes 13. The extension plates 22 are cavity-type structures, and the inner cavities of the extension plates 22 are in conduction connection with the output end of the booster pump 12. The extension plates 22 correspond to the diffusion pipes 13 one by one. The extension plates 22 are located above the diffusion pipes 13. Uniformly distributed spray holes 23 are opened at the bottom of the extension plates 22, i.e., on the side away from the rotation direction.

[0031] When the booster pump 12 pumps the water flow, a part of the water flow is pumped into the inner cavity of the extension plate 22 and flows along the inner cavity of the extension plate 22. During this process, under the action of gravity, the water flow drips downward along the spray holes 23, thereby spraying the atomized medicament, avoiding the reduction of the liquid mist concentration above the liquid surface, and enabling the medicament to be mixed with the pool water. A floating disk 24 is sleeved on the floating seat 1. The floating disk 24 extends below the confluence disk. The floating disk 24 is a conical structure, and the floating disk 24 covers the floating seat 1.

[0032] The floating disk 24 is elastically connected to the floating seat 1 by a spring. The bottom end of the floating disk 24 is always located below the liquid level. A receiving disk 25 is fixedly sleeved on the medicine tank 11. A drainage groove 26 is formed at the bottom end of the receiving disk 25. A baffle 27 is fixedly installed on the extension plate 22. The baffle 27 is used to block the drainage groove 26. During the rotation of the diffusion tube 13, the drainage groove 26 is periodically opened.

[0033] As the water jets continuously spray water columns from the spray heads 21 on the spray ring 2, part of the water flow converges above the floating seat 1 and, under the action of gravity, falls onto the receiving disk 25 and is collected by the receiving disk 25. As the rotating ring 31 continues to rotate, the diffusion tube 13 drives the baffle 27 to move. When the baffle 27 separates from the drainage groove 26, the drainage groove 26 loses its blockage, causing the water flow collected in the receiving disk 25 to flow downward through the drainage groove 26 and, after being guided by the floating disk 24, flow upward to the liquid surface. On the one hand, after being guided by the floating disk 24, the water flow obliquely flows into the pool water, causing the pool water to diffuse outward in the form of water waves. On the other hand, due to the intermittent drainage of the drainage groove 26, when the water flow impacts the floating disk 24, the floating disk 24 moves downward, and when the water flow stops, the floating disk 24 moves upward under the support of buoyancy and the spring. Therefore, during the up and down floating process of the floating disk 24, the pool water is impacted up and down, further causing the pool water to fluctuate in the form of water waves. With the conduction of the water waves, the movement effect of the suspended substances on the liquid surface is enhanced. Combined with the continuous water spraying, the diffusion of the drug into the pool water is more convenient. At the same time, the formation of the water waves will cause the pool water to have a tendency to diffuse outward from the center of the floating seat 1. Combined with the centripetal spraying of the spray ring 2 to continuously supply water flow, the efficiency of the water flow on the liquid surface in the pool to diffuse outward is increased, thereby assisting in improving the diffusion efficiency of the medicament dissolved in water on the liquid surface.

[0034] As a preferred embodiment of the present invention, the centripetal spraying mechanism further includes a positioning tube 28. The positioning tube 28 is a telescopic hollow tubular structure. The positioning tube 28 is used to connect the spray ring 2 and the floating seat 1. The output end of the booster pump 12 is connected to the spray ring 2 through the positioning tube 28 in a conducting manner.

[0035] The spray heads 21 are all connected to the spray ring 2 in a conducting manner through bellows 51. A bracket 5 is fixedly installed on the spray ring 2. The tail end of the spray head 21 is hingedly installed on the bracket 5.

[0036] An offset groove 52 is formed on the floating seat 1. An eccentric wheel 53 with an open top end is fixedly installed on the positioning tube 28. A docking tube 54 is installed on the floating seat 1. The docking tube 54 is connected to the output end of the booster pump 12 in a conducting manner. The eccentric wheel 53 is elastically installed in the offset groove 52 by a spring. In the initial state, the docking tube 54 is aligned and conducting with the top opening of the eccentric wheel 53.

[0037] In order to make the relative position between the spray ring 2 and the floating seat 1 relatively stable during the movement of the floating seat 1, a positioning pipe 28 is provided in the present invention. A plurality of positioning pipes 28 are used to make the relative position between the spray ring 2 and the floating seat 1 relatively stable. During the continuous spraying of the medicament, when the spray ring 2 moves to the edge of the pool and is blocked by the pool, causing a relative displacement between the spray ring 2 and the floating seat 1, the docking pipe 54 and the opening of the eccentric wheel 53 are misaligned, thereby reducing the conduction area between the docking pipe 54 and the opening of the eccentric wheel 53, and reducing the efficiency of the water flow pumped into the spray ring 2. As a result, the water pressure in the bellows 51 is reduced, and further the supporting force of the bellows 51 on the end of the spray head 21 is reduced. At this time, the end of the spray head 21 away from the spray ring 2 gradually deflects downward, reducing the upward inclination angle of the sprayed water flow and lowering the height of the formed water curtain, further reducing the probability of the pool water leaking due to spraying. At the same time, with the lowering of the water curtain, it becomes more difficult for the air flow or wind force to push the sprayed water flow to change direction, further reducing the probability of the pool water leaking.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A seawater desalination impurity pretreatment device, characterized in that: It includes a chemical agent diffusion mechanism installed on a pretreatment tank. The chemical agent diffusion mechanism includes a floating seat (1), a chemical agent tank (11), a booster pump (12), and a diffusion pipe (13). The booster pump (12) is fixedly installed on the floating seat (1). The input end of the booster pump (12) extends below the floating seat (1), and a confluence plate is installed at the output end of the booster pump (12). The chemical agent tank (11) is installed above the confluence plate. The chemical agent tank (11) and the output end of the booster pump (12) are both connected to the confluence plate in a conducting manner. The diffusion pipe (13) is installed on the confluence plate, and the diffusion pipes (13) are evenly arranged along the circumferential direction of the confluence plate. Atomizing heads (14) are evenly distributed on the diffusion pipe (13), and the axes of the atomizing heads (14) are parallel to the water surface. It further includes a centripetal spraying mechanism, which settles the atomized liquid medicine in the air by spraying. The centripetal spraying mechanism includes a spraying ring (2). The spraying ring (2) is located outside the floating seat (1). The output end of the booster pump (12) is designed as a multi-headed tubular shape, and the output end of the booster pump (12) is connected to the spraying ring (2) in a conducting manner. Spraying heads (21) are evenly installed on the spraying ring (2). The spraying heads (21) are all inclined upward, and the inclined directions of the spraying heads (21) all face the axial direction of the floating seat (1).

2. The seawater desalination impurity pretreatment equipment according to claim 1, characterized in that: The confluence plate is composed of a support seat (3) and a rotating ring (31). The support seat (3) is fixedly installed between the booster pump (12) and the chemical agent tank (11). The rotating ring (31) is rotatably installed on the support seat (3). The atomizing heads (14) are all located on the same side of the diffusion pipe (13), and the opening directions of the atomizing heads (14) on multiple diffusion pipes (13) are the same in the circumferential direction.

3. The seawater desalination impurity pretreatment device according to claim 2, wherein: A blending cavity (32) is formed on the support seat (3). An annular groove (33) is formed between the rotating ring (31) and the support seat (3). The blending cavity (32) is connected to the annular groove (33) in a conducting manner. The chemical agent tank (11) and the output end of the booster pump (12) are both connected to the blending cavity (32) in a conducting manner.

4. The seawater desalination impurity pretreatment equipment according to claim 3, characterized in that: A flow-limiting pipe (4) is fixedly installed at the bottom end of the chemical agent tank (11). The flow-limiting pipe (4) extends into the blending cavity (32). A metering wheel (41) is rotatably installed in the flow-limiting pipe (4). The metering wheel (41) is a wheel-shaped structure with evenly spaced slots in the circumferential direction, and the bottom end of the metering wheel (41) extends into the blending cavity (32).

5. The seawater desalination impurity pretreatment equipment according to claim 1 or 4, characterized in that: Extension plates (22) are installed on multiple diffusion pipes (13). The extension plates (22) are cavity-type structures, and the inner cavities of the extension plates (22) are connected to the output end of the booster pump (12) in a conducting manner. The extension plates (22) correspond to the diffusion pipes (13) one by one. The extension plates (22) are located above the diffusion pipes (13), and evenly distributed spraying holes (23) are formed at the bottom of the extension plates (22), i.e., on the side away from the rotation direction.

6. The seawater desalination impurity pretreatment equipment according to claim 5, characterized in that: A floating disk (24) is sleeved on the floating seat (1). The floating disk (24) extends below the confluence plate. The floating disk (24) is a conical structure, and the floating disk (24) covers the floating seat (1).

7. The seawater desalination impurity pretreatment equipment according to claim 6, characterized in that: The floating disc (24) is elastically connected to the floating seat (1) by a spring. The bottom end of the floating disc (24) is always located below the liquid level. A receiving disc (25) is fixedly sleeved on the medicine tank (11). A drainage groove (26) is formed at the bottom end of the receiving disc (25). A baffle (27) is fixedly installed on the extension plate (22). The baffle (27) is used to block the drainage groove (26). During the rotation of the diffuser tube (13), the drainage groove (26) is periodically opened.

8. A seawater desalination impurity pretreatment device according to claim 1 or 7, characterized in that: The centripetal spraying mechanism further includes a positioning tube (28). The positioning tube (28) is a telescopic hollow tubular structure. The positioning tube (28) is used to connect the spraying ring (2) and the floating seat (1). The output end of the booster pump (12) is connected to the spraying ring (2) through the positioning tube (28) in a conducting manner.

9. A seawater desalination impurity pretreatment device according to claim 8, characterized in that: The spray heads (21) are all connected to the spraying ring (2) in a conducting manner through bellows (51). A bracket (5) is fixedly installed on the spraying ring (2). The tail end of the spray head (21) is hingedly installed on the bracket (5).

10. The seawater desalination impurity pretreatment equipment according to claim 9, characterized in that: An offset groove (52) is formed on the floating seat (1). An eccentric wheel (53) with an open top end is fixedly installed on the positioning tube (28). A docking tube (54) is installed on the floating seat (1). The docking tube (54) is connected to the output end of the booster pump (12) in a conducting manner. The eccentric wheel (53) is elastically installed in the offset groove (52) by a spring. In the initial state, the docking tube (54) is aligned and conducted with the open top end of the eccentric wheel (53).

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