CN115818907B

CN115818907B - Seawater desalination pretreatment system

Info

Publication number: CN115818907B
Application number: CN202310173461.8A
Authority: CN
Inventors: 李珂; 徐晓鹏; 刘欣怡; 刘长青; 张卫军
Original assignee: Qingdao Baifa Seawater Desalination Co ltd
Current assignee: Qingdao Baifa Seawater Desalination Co ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-06-02
Anticipated expiration: 2043-02-28
Also published as: CN115818907A

Abstract

The application relates to a sea water desalination pretreatment system, comprising: a sea pool; the sand bearing box is fixed on one side above the sea water pool; mesh conveyer belt, but continuous rotation sets up in the sea water pond, mesh conveyer belt's both sides laminating is in the both sides wall in sea water pond, include: the first conveying section is vertically attached to the vertical wall of the water inlet end of the seawater pond; the second conveying section is obliquely arranged in the sea water pool, the lower end of the second conveying section is connected with the first conveying section, and the upper end of the second conveying section extends into the sand bearing box; the filter membrane is adhered to the inner surface of the mesh conveyor belt; and the cleaning component is arranged on the sand bearing box and is used for spraying water to the mesh conveyor belt from the inside and the outside of the mesh conveyor belt. The application has the effects of effectively realizing the filtration of the muddy sand in the seawater, reducing the excessive influence on the filtration effect of muddy sand accumulation and improving the filtration efficiency and filtration quality of the seawater.

Description

Seawater desalination pretreatment system

Technical Field

The application relates to the field of seawater treatment, in particular to a seawater desalination pretreatment system.

Background

Sea water desalination is to produce fresh water by sea water desalination. The open source increment technology for realizing the water resource utilization can increase the total fresh water, is not influenced by space time and climate, and can ensure the stable water supply of coastal resident drinking water, industrial boiler water supply and the like. The sea water desalination treatment process generally mainly comprises: the method mainly comprises the steps of impurity removal, filtration, reverse osmosis treatment and desalinated water tempering, wherein the pretreatment is also called pretreatment and mainly comprises two steps of impurity removal and filtration, specifically, the impurity removal is carried out by extracting seawater and then placing the extracted seawater into a separate seawater pool to remove visible impurities in the seawater, such as enteromorpha or large-volume floaters, and the like, the filtration is carried out by removing particles, sand, colloid, and other impurities in the seawater from the seawater after the impurity removal, preparation is carried out for the reverse osmosis treatment, and if the pretreatment of the seawater is not perfect, the subsequent reverse osmosis treatment is greatly influenced, equipment blockage is caused, the operation of the equipment is influenced, and the seawater desalination treatment cannot be carried out continuously.

The pretreatment of sea water desalination in the related art generally adopts to take sea water to the sea water pond and then stand, firstly salvages enteromorpha, and then sets up single-channel or multi-channel filter screen in the pond, and along with the continuous entering of sea water filter pond, sea water can constantly pass the filter screen and realize filtering, but along with the gradual filtration of sea water, the more the muddy sand in the sea water pond can originally be, leads to the sea water pond internal environment to be more and more abominable, and then extremely easily blocks the filter screen, influences the filtration quality of filter screen and influences filtration treatment efficiency and filtration quality of sea water.

Therefore, it is needed to provide a new seawater pretreatment system, which can effectively filter muddy sand in seawater, reduce the influence of excessive accumulation of muddy sand on the filtering effect, and improve the seawater filtering efficiency and the filtering quality.

Disclosure of Invention

In order to solve the problem in the background art, can effectually realize the filtration of silt particle in the sea water, reduce that silt particle is piled up too much and influence the filter effect, improve sea water filtration efficiency and filtration quality, this application provides a sea water desalination pretreatment systems.

The application provides a sea water desalination pretreatment systems adopts following technical scheme:

a desalination pretreatment system comprising:

a sea pool;

the sand bearing box is fixed on one side above the sea water pool;

mesh conveyer belt, but continuous rotation sets up in the sea water pond, mesh conveyer belt's both sides laminating is in the both sides wall in sea water pond, include:

the first conveying section is vertically attached to the vertical wall of the water inlet end of the seawater pond;

the second conveying section is obliquely arranged in the sea water pool, the lower end of the second conveying section is connected with the first conveying section, and the upper end of the second conveying section extends into the sand bearing box;

the filter membrane is adhered to the inner surface of the mesh conveyor belt;

and the cleaning component is arranged on the sand bearing box and is used for spraying water to the mesh conveyor belt from the inside and the outside of the mesh conveyor belt.

Through adopting above-mentioned technical scheme, after the sea water gets into its water inlet end, the silt particle that carries in the sea water pond will get into the sea water pond together, at this moment, because both sides of mesh conveyer belt all laminate in the both sides of sea water pond, and mesh conveyer belt internal surface subsides are covered with the filter membrane, consequently, when the rivers flow through the mesh conveyer belt, the sea water will filter through the filter membrane, block the silt particle in the sea water to the one side that the mesh conveyer belt is close to sea water pond feed, meanwhile, the continuous rotation of mesh conveyer belt, can be with the continuous transportation of silt particle in the sea water pond to hold in realizing the input of silt particle in the sand box, avoid the silt particle too much in the sea water pond, and after the conveyer belt upper end conveys to hold in the sand box, and can be by mesh conveyer belt inside and outside to mesh conveyer belt water spray, thereby the reverse cleaning of filter membrane on one side, the other side is directly cleaned to the conveyer belt, so that the realization silt particle is fast from the conveyer belt to hold in the sand box, and when leaving to one side of sea water pond, can be guaranteed to the sea water pond, and the filter segment can be guaranteed to the sea water, and the filter segment can be guaranteed to the filter the sea water in addition, the filter segment can be guaranteed to the filter the side of the sea water is guaranteed, and the filter segment can be guaranteed to the filter quality is guaranteed to the filter the sea water that has the filter segment is guaranteed to the filter segment in the filter segment that has the filter effect that has been in addition to the filter segment that the filter segment is guaranteed to the filter segment to the filter quality to the filter segment and has the filter quality to the filter segment to be well to the filter quality to be well to be filled down in the filter.

Optionally, the filter membrane is an annular filter belt, and the filter membrane can slide on the mesh conveyor belt along the rotation direction of the mesh conveyor belt relative to the inner surface of the mesh conveyor belt.

Through adopting above-mentioned technical scheme, the filter membrane that sets up can slide for the mesh conveyer belt, can adjust the mesh position that the different positions of filter membrane correspond the mesh conveyer belt, and then can effectually utilize the different positions of filter membrane to carry out the filtration of sea water, improves the utilization ratio of filter membrane.

Optionally, the method further comprises:

the lower conveying roller is rotatably arranged in the sea water pool, and one end, away from the drag flask, of the filter membrane and the mesh conveying belt is sleeved on the lower conveying roller;

the unidirectional toothed ring is arranged at the end part of the lower conveying roller in a unidirectional rotatable way, the width of two sides of the mesh conveying belt is larger than the width of the filter membrane, and slots are formed on two sides of the inner surface of the mesh conveying belt and are used for being matched with the unidirectional toothed ring.

And the second pawl is arranged on the lower conveying roller and is used for driving the unidirectional toothed ring to synchronously rotate along with the lower conveying roller so as to enable the filter membrane and the upper side of the mesh conveying belt to trend to the sand bearing box to move.

Through adopting above-mentioned technical scheme, during operation, lower conveying roller passes through the synchronous rotation of second pawl drive unidirectional ring gear, so that filter membrane and mesh conveyer belt synchronous rotation, realize sending the silt particle to the drag flask, when the relative position of filter membrane and mesh conveyer belt needs to be adjusted, reverse rotation lower conveying roller, at this moment, because unidirectional ring gear only can unidirectional rotation, just can be static this moment, thereby it can not rotate to drive the mesh conveyer belt, and lower conveying roller continues to rotate, can drive the relative mesh conveyer belt of filter membrane and rotate, adjust the relative position of filter membrane and mesh conveyer belt, after accomplishing the regulation, forward rotation operation again, unidirectional ring gear can with lower conveying roller synchronous motion again, realize the synchronous operation of filter membrane and mesh conveyer belt, thereby the change of filter membrane filtering position has been realized.

Optionally, the method further comprises:

the upper conveying roller is rotatably arranged in the sand bearing box, the upper conveying roller is sleeved at the upper end of the mesh conveying belt, and the cleaning component comprises:

the water cavity is formed in the upper conveying roller, and a plurality of water spray holes are formed in the peripheral surface of the upper conveying roller;

the second water supply pipe is arranged on one side of the sand bearing box and is used for supplying water to the water cavity of the upper conveying roller.

Through adopting above-mentioned technical scheme, when realizing carrying the mesh conveyer belt at last conveying roller, the second delivery pipe sprays the outside of mesh conveyer belt to the inboard of mesh conveyer belt through a plurality of water spray holes of last conveying roller global with high-pressure rivers, can realize the back-cleaning to filter membrane and mesh conveyer belt, reduces the jam probability of mesh conveyer belt.

Optionally, a plurality of sponge barrier strips perpendicular to the conveying direction of the mesh conveying belt are fixed on the outer surface of the mesh conveying belt.

Through adopting above-mentioned technical scheme, in the transportation process of mesh conveyer belt, the sponge separates the check that the blend stop can be realized to the silt, reduce the silt and carry by the second when section is carried through to the second along with the mesh conveyer belt and carry the volume of slipping on the section to guarantee that the silt can be carried in the drag flask, and when the sponge separates the blend stop and carries to first section position along with the mesh, the sponge separates the blend stop and receives the extrusion of sea water pond vertical wall, can deformation compression, and seal between the vertical lateral wall in sea water pond and the first section of carrying, avoid the silt to fall between sea water pond and the first section of carrying.

Optionally, the method further comprises:

the vortex generating device is arranged at one side of the seawater pool, which is opposite to the seawater pool, of the corresponding mesh conveyer belt;

the lower end of the circulating pipe is arranged on the bottom surface of the seawater pool and is positioned at the center of the vortex generated by the vortex generating device, and the upper end of the circulating pipe extends to the upper side of the seawater pool;

the circulating element is arranged on the circulating pipe and is used for conveying water from the lower end of the circulating pipe to the upper end of the circulating pipe;

and the drain pipe is communicated with the side wall of the seawater pool, on which the vortex generating device is arranged.

Through adopting above-mentioned technical scheme, during operation, vortex generating device starts, will generate the vortex in the sea water pond through mesh conveyer belt filterable sea water in the sea water pond, at this moment, residual impurity in the sea water pond will be rolled up vortex center, circulating element starts simultaneously, can realize taking away the impurity at vortex center in sea water simultaneously and returning to in the sea water pond again, in this process, because the impurity all is rolled up the vortex center in sea water pond, the vortex outside position impurity volume in sea water pond will greatly reduced, at this moment, can send out the rivers outside the sea water pond vortex through the drain pipe, in order to realize the secondary filtration of sea water.

Optionally, the vortex generating device includes:

the support ring is horizontally arranged in the sea water tank, and a containing cavity is arranged in the support ring and is used for being connected with the upper end of the circulating pipe;

the tangential spray heads are fixed along the tangential direction of the support ring and are communicated with the support ring.

Through adopting above-mentioned technical scheme, during the operation, make the water pump in the circulating pipe send back in the sea water pond through circulating element, the water of pump back in the sea water pond will have each tangential shower nozzle blowout again through the support ring, accelerates the circulation of rivers, and the continuous extraction of vortex middle part sea water and impurity is taken out to the drinking-water pipe of cooperation sea water pond bottom again, can realize realizing the vortex in the sea water pond to make the impurity in the sea water pond assemble vortex center.

Optionally, the method further comprises:

the water filtering tank is fixed and communicated with the lower side of the sand bearing box;

the first seepage filtering layer is arranged between the sand bearing box and the water filtering tank;

the second water seepage filter layer is arranged below the corresponding first water seepage filter layer in the sand bearing box;

the circulation pipe includes:

the first circulating pipe is connected to the lower side of the seawater pool and the lower side of the second water seepage filtering layer corresponding to the water filtering tank;

the second circulating pipe is connected between the upper side of the sea water tank and the position, corresponding to the position between the first water seepage filtering layer and the second water seepage filtering layer, of the water filtering tank, and the circulating element is arranged on the second circulating pipe.

Through adopting above-mentioned technical scheme, the moisture that contains in the mud in the drag flask will fall to the downside of first infiltration filter layer in the filter tank after the infiltration of first infiltration filter layer, simultaneously, after the first circulating pipe pumps rivers to the filter tank, aquatic impurity will also be blocked in second infiltration filter layer below, and at this moment, the rivers impurity between first infiltration filter layer and the second infiltration filter layer in the filter tank can be great reduction, then rethread second circulating pipe can be with the rivers of filter in the filter tank rethread second circulating pipe back to the sea pond, filters once more.

Optionally, the method further comprises:

the grid baffle is inserted into the water inlet end of the sea water tank, the upper side of the grid baffle protrudes out of the liquid level of the sea water tank, and a gap is formed between the lower side of the grid baffle and the upper side of the mesh conveyer belt.

Through adopting above-mentioned technical scheme, when the seawater drops into the sea water pond, the floater such as sea weed, enteromorpha that get into along with the seawater will be blocked in the check baffle and be close to the one end of sea water pond inflow, avoid a large amount of floaters such as sea weed, enteromorpha to send to the drag flask along with the mesh conveyer belt to improve the separation degree of silt.

Optionally, the method further comprises:

the driving roller is rotatably arranged on the upper side of one water inlet end of the sea chest,

the driven roller is rotatably arranged on one side of the grid baffle close to the driving roller and is positioned below the liquid level of the seawater pool;

the isolation net belt is sleeved between the driving roller and the driven roller.

Through adopting above-mentioned technical scheme, after the floater such as sea weed, enteromorpha drops into the sea water pond, can keep apart floater such as sea weed, enteromorpha in the isolation net top through the isolation net, then rotate along with the drive roll, can send floater such as sea weed, enteromorpha outside the sea water pond, realize the separation of floater such as sea weed, enteromorpha.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when seawater enters the water inlet end of the seawater tank, the muddy sand carried in the seawater tank enters the seawater tank together, at the moment, as the two sides of the mesh conveying belt are attached to the two sides of the seawater tank, and the inner surface of the mesh conveying belt is attached with the filter membrane, when water flows through the mesh conveying belt, the seawater is filtered through the filter membrane, the muddy sand in the seawater is blocked to one side of the mesh conveying belt, which is close to the feeding side of the seawater tank, at the same time, the continuous rotation of the mesh conveying belt can continuously convey the muddy sand in the seawater tank into the sand bearing box to realize the throwing of the muddy sand, excessive muddy sand in the seawater tank is avoided, and when the upper end of the conveying belt is conveyed into the sand bearing box, the cleaning component can spray water to the mesh conveying belt from the inside and outside of the mesh conveying belt, so that the filter membrane is reversely cleaned on one hand, the conveyer belt is cleaned in the normal direction, so that the muddy sand is conveyed into the bearing box from the conveyer belt rapidly, the conveyer belt and the filter membrane are cleaned, when the circulating conveyer belt rotates to the side, deviating from water inlet, of the seawater pool, the muddy sand can be prevented from being brought into the seawater pool again, the filter membrane is ensured to be clean, so that the conveyer belt circulates to one water inlet end of the seawater pool again to work, in addition, as the first conveying section of the conveyer belt is attached to the vertical side wall of the water inlet side of the seawater pool, the lower end of the second conveying section is connected to the first conveying section, the muddy sand falling into the seawater pool can be ensured to be positioned on the upper side of the conveyer belt, so that the muddy sand is conveyed out, the filtration of the muddy sand in the seawater can be effectively realized, the excessive accumulation of the muddy sand is reduced, the filtration effect is influenced, and the seawater filtration efficiency and the filtration quality are improved;

2. the lower conveying roller drives the unidirectional toothed ring to synchronously rotate through the second pawl so that the filter membrane and the mesh conveying belt synchronously rotate, the sand is conveyed to the sand bearing box, when the relative position of the filter membrane and the mesh conveying belt needs to be adjusted, the lower conveying roller reversely rotates, at the moment, the unidirectional toothed ring can only unidirectionally rotate, so that the mesh conveying belt can be driven to rotate, the lower conveying roller continuously rotates, the filter membrane can be driven to rotate relative to the mesh conveying belt, the relative position of the filter membrane and the mesh conveying belt is adjusted, after the adjustment is finished, the unidirectional toothed ring can synchronously move with the lower conveying roller again, and the synchronous operation of the filter membrane and the mesh conveying belt is realized, so that the replacement of the filter position of the filter membrane is realized, and the utilization rate of the filter membrane is improved.

Drawings

FIG. 1 is a schematic diagram of a seawater desalination pretreatment system according to an embodiment of the present application;

FIG. 2 is a schematic view of an isolation web with a discharge section in an embodiment of the present application;

FIG. 3 is a schematic view showing a state that a mesh conveyer belt is overlapped with a filter membrane in the embodiment of the application;

FIG. 4 is a schematic view of a lower conveying roller structure in an embodiment of the present application;

FIG. 5 is an exploded view of a unidirectional ring gear structure in an embodiment of the present application;

FIG. 6 is a schematic illustration of an upper feed roller configuration in an embodiment of the present application;

FIG. 7 is a schematic view of a mesh conveyor belt with a stripping section in an embodiment of the present application;

FIG. 8 is a schematic diagram of a seawater desalination pretreatment system comprising a filtered water tank structure in an embodiment of the present application;

fig. 9 is a schematic structural view of a water filtering tank according to an embodiment of the present application.

Reference numerals illustrate: 1. a sea pool; 11. a grid baffle; 12. an isolation net belt; 121. a drive roll; 122. driven roller; 123. a scraper; 124. a discharging section; 125. a steering roller; 13. a lower conveying roller; 131. a second pawl; 14. an upper conveying roller; 141. a water spraying hole; 15. a guide disc; 16. a guide roller; 17. a unidirectional toothed ring; 171. annular tooth slots; 172. a first pawl; 173. ratchet tooth slot; 18. a reversing roller; 19. a carrier roller; 2. a mesh conveyor belt; 21. a first conveying section; 22. a second conveying section; 23. a slot; 24. a sponge barrier strip; 25. a stripping section; 3. a filter membrane; 4. a sand-bearing box; 41. an outer cleaning tube; 411. a nozzle; 5. a vortex generating device; 51. a support ring; 52. a tangential spray head; 53. a communicating pipe; 6. a circulation pipe; 61. a circulation element; 62. a first circulation pipe; 63. a second circulation pipe; 7. a drain pipe; 8. a water filtering tank; 81. a first water-permeable filter layer; 82. and a second water seepage filter layer.

Detailed Description

The embodiment of the application discloses sea water desalination pretreatment systems, mainly used realizes the filtration of silt particle in the sea water, reduces the silt particle and piles up too much problem that influences the filter effect to improve sea water filtration efficiency and filtration quality.

The present application is described in further detail below in conjunction with figures 1-9.

Referring to fig. 1, a seawater desalination pretreatment system includes a seawater tank 1, a float filter member provided in the seawater tank 1, and a silt filter member. Wherein sea water pond 1 is used for realizing the bearing to the sea water of drawing, and floater filter element is used for realizing the filtration discharge to the floater such as sea grass enteromorpha in sea water pond 1, and silt filter element is used for realizing the filtration discharge to the silt in sea water pond 1.

Referring to fig. 1, specifically, the bottom of the seawater tank 1 is rectangular, one end of the seawater tank 1 is used as a water inlet end, the other end is used as a water outlet end, and the upper side of the seawater tank 1 is opened. The float filter member comprises a lattice baffle 11 and an isolation mesh belt 12.

Referring to fig. 1, the lattice baffle 11 is vertically disposed at the middle of the length direction of the sea chest 1, the length direction of the lattice baffle 11 is disposed along the width direction of the sea chest 1, and both ends of the lattice baffle 11 are fixed to both vertical sidewalls of the sea chest 1, the upper side of the lattice baffle 11 extends out of the upper side of the liquid surface of the sea chest 1, and the lower side of the lattice baffle 11 extends below the liquid surface of the sea chest 1, in addition, the lower end of the lattice baffle 11 may be disposed obliquely toward the water inlet end of the sea chest 1. After the seawater is put into the seawater pool 1, the grid baffle plates 11 are arranged so that floaters in the seawater are blocked at the water inlet end of the seawater pool 1 by the grid baffle plates 11.

Referring to fig. 1, a driving roller 121 is rotatably provided on the upper side of the water inlet end of the seawater tank 1 in the width direction of the seawater tank 1, a driven roller 122 is rotatably provided on the lower side of the grid baffle 11 in the length direction of the grid baffle 11, the driven roller 122 is positioned at a position of the grid baffle 11 close to the water inlet end of the seawater tank 1, an isolation net 12 is sleeved between the driving roller 121 and the driven roller 122, and both sides of the isolation net 12 in the width direction can be abutted against both sides of the seawater tank 1. The isolation net belt 12 may be a rubber conveyer belt with meshes, or a braided net belt such as a steel rope nylon rope, or a rubber conveyer belt with meshes is preferably used to facilitate the separation of the float such as seaweed from the isolation net belt 12. The sea chest 1 is further provided with a first driving element such as a motor, which can drive the driving roller 121 to continuously rotate, at one end corresponding to the driving roller 121.

Referring to fig. 1, the isolation net belt 12 is disposed in the seawater pool 1 in an inclined manner, the upper end of the isolation net belt extends to the upper side of one end of the seawater pool 1, the lower end of the isolation net belt extends to the lower side of the liquid surface of the seawater pool 1, and the isolation net belt 12 is matched with the grid baffle 11, so that on one hand, floats such as seaweed and enteromorpha can be isolated when seawater is put into the seawater pool 1, and on the other hand, the floats such as seaweed and enteromorpha on the upper side of the isolation net belt 12 can be sent to the water returning pool by driving the isolation net belt 12 to continuously rotate along with the first driving element.

Referring to fig. 1, further, in order to improve the discharge of the floating objects such as seaweed and enteromorpha in the sea pool 1, a plurality of scraping plates 123 may be uniformly disposed on the circumferential surface of the isolation net 12 along the width direction thereof, so that the discharge efficiency of the floating objects such as seaweed and enteromorpha may be improved by cooperating with the scraping plates 123 along with the rotation of the isolation net 12.

Referring to fig. 2, further, in order to facilitate the discharge of the floats such as seaweed and enteromorpha from the upper end of the isolation net belt 12, a discharge section 124 extending downward and outward toward the sea pool 1 may be provided at the upper end of the isolation net belt 12. I.e. the primary drive roller 121 is provided as a turning roller 125 and the drive roller 121 is rotatably arranged at a position below the reversing roller 18 at the outer end of the sea chest 1. Thus, when the floaters such as seaweed and enteromorpha fall to the discharge section 124 of the isolation net belt 12 after being conveyed by the isolation net belt 12, the floaters are accelerated to be discharged from the discharge section 124 of the isolation net belt 12 by the gravity of the floaters, so that the discharge efficiency of the floaters such as seaweed and enteromorpha is improved.

Referring to fig. 1, the silt filter member comprises a mesh conveyor belt 2, a filter membrane 3 and a drag flask 4, the mesh conveyor belt 2 is disposed obliquely along the length direction of the sea chest 1 as a whole, i.e., the lower end of the mesh conveyor belt 2 is located in the sea chest 1, and the upper end of the mesh conveyor belt 2 extends into the drag flask 4.

Referring to fig. 1 and 2, specifically, the mesh conveyor belt 2 has the same width as the seawater pond 1, and the mesh conveyor belt 2 includes a first conveyor section 21 and a second conveyor section 22 which are sequentially provided, the first conveyor section 21 is vertically abutted against a vertical wall of a water inlet end of the seawater pond 1, one end of the second conveyor section 22 is connected with a lower end of the first conveyor section 21, and the other end thereof is inclined upward toward a direction away from the first conveyor section 21 to extend out of an upper side of a water discharge end of the seawater pond 1.

Referring to fig. 1 and 2, a lower conveying roller 13 is rotatably disposed in the seawater pond 1 corresponding to the upper end of the first conveying section 21 and disposed along the width direction of the seawater pond 1, the upper end of the first conveying section 21 is sleeved on the lower conveying roller 13, and a second driving element such as a motor capable of driving the lower conveying roller 13 to continuously rotate is disposed at one end of the seawater pond 1 corresponding to the lower conveying roller 13. The upper conveying roller 14 with the same width as the sea chest 1 is rotatably arranged in the sand bearing box 4, and the upper end of the second conveying section 22 is sleeved on the upper conveying roller 14. The upper sides of the transition positions of the two sides in the seawater pool 1 corresponding to the first conveying section 21 and the second conveying section 22 are rotatably provided with guide discs 15, and the inner positions of the seawater pool 1 corresponding to the first conveying section 21 and the second conveying section 22 are rotatably provided with guide rollers 16.

Referring to fig. 1 and 2, during operation, the second driving element drives the lower conveying roller 13 to rotate, so as to drive the mesh conveying belt 2 to continuously rotate, and sequentially pass through the first conveying section 21 and the second conveying section 22, and the guide roller 16 and the guide disc 15 can make the mesh conveying belt 2 smoothly transition between the first conveying section 21 and the second conveying section 22.

The filter membrane 3 also adopts an annular filter belt structure. One surface of the filter membrane 3 is attached to the inner peripheral surface of the mesh conveyor belt 2, and the filter membrane 3 can slide relative to the mesh conveyor belt 2 along the rotation direction of the mesh conveyor belt 2.

Referring to fig. 3 and 4, specifically, the width of the filter membrane 3 is smaller than the width of the mesh conveyor belt 2, slots 23 are formed along the length direction of the mesh conveyor belt 2 at positions where the two sides of the inner surface of the mesh conveyor belt 2 are wider than the filter membrane 3, and unidirectional toothed rings 17 are rotatably arranged at both ends of the lower conveying roller 13, and external teeth of the unidirectional toothed rings 17 can be matched with the slots 23, so that the mesh conveyor belt 2 can be dragged to synchronously rotate when the unidirectional toothed rings 17 rotate.

Referring to fig. 4 and 5, a specific structure for maintaining the unidirectional rotation of the unidirectional ring gear 17 is as follows: the outer end surface of the unidirectional toothed ring 17 is coaxially formed with an annular tooth groove 171, and a first pawl 172 is arranged on the outer side of the seawater pool 1 and is matched with the annular tooth groove 171, so that the unidirectional toothed ring 17 can only drive the upper side of the mesh conveyer belt 2 to rotate towards the direction of the sand bearing box 4.

Referring to fig. 4 and 5, the inner circumferential surface of the unidirectional toothed ring 17 is coaxially formed with a ratchet groove 173. The end of the lower conveying roller 13 is further provided with a second pawl 131, and the second pawl 131 is matched with the ratchet groove 173, so that when the lower conveying roller 13 rotates towards the direction in which the unidirectional toothed ring 17 can rotate, the unidirectional toothed ring 17 can synchronously rotate with the lower conveying roller 13, and when the lower conveying roller 13 rotates towards the direction in which the unidirectional toothed ring 17 cannot rotate, the lower conveying roller 13 can independently rotate away from the unidirectional toothed ring 17.

Referring to fig. 1 and 2, during operation, after the sea weed, enteromorpha and other floaters are filtered by the isolation net belt 12, the muddy sand carried in the sea water pond 1 enters the sea water pond 1 together, at this time, because both sides of the mesh conveyer belt 2 are attached to both sides of the sea water pond 1, and the inner surface of the mesh conveyer belt 2 is attached with the filter membrane 3, when water flows through the mesh conveyer belt 2, the seawater is filtered by the filter membrane 3, the muddy sand in the seawater is blocked to one side of the mesh conveyer belt 2, which is close to the feeding side of the sea water pond 1, and meanwhile, the continuous rotation of the mesh conveyer belt 2 can continuously convey the muddy sand in the sea water pond 1 into the sand holding box 4 to realize the throwing of the muddy sand, so as to avoid excessive muddy sand in the sea water pond 1.

Referring to fig. 3 and 4, when the mesh position of the corresponding mesh conveyer belt 2 of the filter membrane 3 needs to be adjusted after a period of work, the second driving element drives the lower conveyer roller 13 to rotate, the lower conveyer roller 13 drives the unidirectional toothed ring 17 to synchronously rotate through the second pawl 131, so that the filter membrane 3 synchronously rotates with the mesh conveyer belt 2, the sand and mud are delivered to the sand bearing box 4, when the relative position of the filter membrane 3 and the mesh conveyer belt 2 needs to be adjusted, the lower conveyer roller 13 reversely rotates, at the moment, the unidirectional toothed ring 17 only can rotate unidirectionally, so that the mesh conveyer belt 2 can not rotate, the lower conveyer roller 13 continuously rotates, the filter membrane 3 can be driven to rotate relative to the mesh conveyer belt 2, the relative position of the filter membrane 3 and the mesh conveyer belt 2 is adjusted, after the adjustment is completed, the unidirectional toothed ring 17 can synchronously move with the lower conveyer roller 13 again, the synchronous operation of the filter membrane 3 and the mesh conveyer belt 2 is realized, and the replacement of the filter position of the filter membrane 3 is realized, and the utilization rate of the filter membrane 3 is improved.

Furthermore, in order to improve the synchronism between the lower conveying roller 13 and the filter membrane 3 and avoid the filter membrane 3 from slipping, the filter membrane 3 may be provided with a synchronizing groove, and the subordinate conveying roller is correspondingly formed with synchronizing teeth and is matched with the synchronizing groove (not shown in the figure).

Referring to fig. 1, further, in order to improve the carrying capacity of the muddy sand of the mesh conveyor belt 2 in the seawater pond 1, a plurality of sponge barrier strips 24 are uniformly fixed on the outer circumferential surface of the mesh conveyor belt 2, and the sponge barrier strips 24 are arranged along the width direction of the seawater pond 1, so that when the mesh conveyor belt 2 rotates, the sponge barrier strips 24 can realize the check barrier to the muddy sand, reduce the falling amount of the muddy sand when the muddy sand is conveyed along with the mesh conveyor belt 2 through the second conveying section 22, so as to ensure that the muddy sand can be conveyed into the sand bearing box 4, and when the sponge barrier strips 24 are conveyed along with the meshes to the position of the first conveying section 21, the sponge barrier strips 24 are extruded by the vertical wall of the seawater pond 1, can deform and compress, and seal between the vertical side wall of the seawater pond 1 and the first conveying part, so as to prevent the muddy sand from falling between the seawater pond 1 and the first conveying part.

Referring to fig. 1, further, in order to facilitate that the muddy sand can fall into the drag flask 4, the muddy sand is prevented from adhering to the mesh conveyor belt 2 and is returned to the seawater pool 1 again, a cleaning device is arranged in the drag flask 4 and is used for spraying water from outside to the mesh conveyor belt 2 and spraying water from inside the filter membrane 3 to outside of the mesh conveyor belt 2, and is used for rapidly separating the muddy sand from the surface of the mesh conveyor belt 2 and cleaning the filter membrane 3 and the mesh conveyor belt 2.

Referring to fig. 1, the cleaning member includes an outer cleaning tube 41, the outer cleaning tube 41 being fixed in the drag flask 4 in the width direction of the mesh conveyor belt 2, the outer cleaning tube 41 being located at a position obliquely above the upper side end of the mesh conveyor belt 2. The outer wash pipe 41 is formed with a plurality of nozzles 411 along its length direction toward one side of the mesh conveyor belt 2, and a first water supply pipe communicating with the outer wash pipe 41 is fixed to the outer side of the drag flask 4 for realizing water supply to the outer wash pipe 41.

Thus, when the mesh conveyor belt 2 carries the sand into the drag flask 4, the nozzles 411 of the outer cleaning pipe 41 spray water toward the drag flask 4, thereby accelerating the separation of the sand from the mesh conveyor belt 2 and the dropping of the sand into the drag flask 4, and cleaning the mesh conveyor belt 2.

Referring to fig. 1 and 6, the cleaning part further includes a water chamber formed inside the upper conveying roller 14, a plurality of water spray holes 141 communicated with the water chamber are formed on the circumferential surface of the upper conveying roller, a second water supply pipe is further fixed at one end of the drag flask 4 corresponding to the upper conveying roller 14, one end of the second water supply pipe is rotatably connected to the upper conveying roller 14, and the other end of the second water supply pipe is communicated with the first water supply pipe and is commonly connected with a high-pressure water supply assembly.

Referring to fig. 1 and 6, when the upper conveying roller 14 carries the mesh conveyor belt 2, the second water supply pipe sprays high-pressure water flow from the inner side of the filter membrane 3 to the outer side of the mesh conveyor belt 2 through the plurality of water spray holes 141 on the peripheral surface of the upper conveying roller 14, so that the separation of mud and sand can be quickened, the filter membrane 3 and the mesh conveyor belt 2 are reversely cleaned, and the blocking probability of the mesh conveyor belt 2 is reduced.

Further with reference to FIG. 7, to facilitate the drainage of sand from the upper side of the mesh conveyor belt 2, the end of the mesh conveyor belt 2 extending into the drag flask 4 may also extend obliquely downward toward the drag flask 4 to form a stripping section 25. At this time, the upper conveying roller 14 is disposed at the end of the stripping section 25, and the upper conveying roller 14 at the end of the second conveying section 22 of the mesh conveying belt 2 is replaced by the unpowered reversing roller 18, and a carrier roller 19 is rotatably disposed between the second conveying section 22 of the mesh conveying belt 2 and the lower side of the stripping section 25, so as to ensure that the mesh conveying belt 2 is switched from the lower side of the stripping section to the lower side of the upper end of the second conveying section 22. By this arrangement, the end of the mesh conveyor belt 2 extending into the drag flask 4 is formed with an inclined downward surface, so that the slip of the sand can be facilitated.

Referring to fig. 7, the silt filter member further includes a vortex generating device 5 and a circulation pipe 6, the vortex generating device 5 being disposed at a side of the mesh conveyor belt 2 in the seawater tank 1 facing away from the inflow of water from the seawater tank 1. The lower end of the circulating pipe 6 is connected to the bottom surface of the seawater pool 1 at the position corresponding to the center of the vortex generated by the vortex generating device 5, the upper end of the circulating pipe 6 is extended into the seawater pool 1 again, and a circulating element 61 such as a water pump is arranged on the circulating pipe 6 for delivering water from the lower end of the circulating pipe 6 to the upper end of the circulating pipe 6. The lower end of the vertical side wall of the sea chest 1 on the side provided with the vortex generating device 5 is also fixed with a drain pipe 7 for draining the inner water of the sea chest 1.

During operation, the vortex generating device 5 is started, seawater filtered by the mesh conveyer belt 2 in the seawater pool 1 is vortex-generated in the seawater pool 1, at the moment, residual impurities in the seawater pool 1 are wound into the center of the vortex, meanwhile, the circulating element 61 is started, the impurities in the center of the vortex can be simultaneously pumped away in the seawater and then returned to the seawater pool 1, in the process, as the impurities are wound into the center of the vortex of the seawater pool 1, the impurity amount at the outer side of the vortex of the seawater pool 1 is greatly reduced, and at the moment, water outside the vortex of the seawater pool 1 can be discharged through the drain pipe 7, so that the secondary filtering of the seawater is realized.

Referring to fig. 7, specifically, the vortex generating device 5 includes a support ring 51 horizontally fixed in the sea chest 1, a cavity is formed inside the support ring 51, a plurality of tangential spray heads 52 are further fixed at the lower side of the circumferential surface of the support ring 51, and the plurality of tangential spray heads 52 are fixed along the tangential direction of the support ring 51 and are communicated with the support ring 51. A communication pipe 53 is also fixed to the axial position of the support ring 51, and the communication pipe 53 is connected to the upper end of the circulation pipe 6.

With reference to fig. 8 and 9, further, in order to filter the seawater passing through the circulation pipe 6 and avoid the impurity from being sent back into the seawater pool 1, a filtering water tank 8 is further arranged outside the seawater pool 1.

Referring to fig. 9, specifically, the water filtering tank 8 is fixed on the lower side of the foundry flask 4, and the water filtering tank 8 is connected to the foundry flask 4, and a first water seepage filter layer 81 is disposed between the water filtering tank 8 and the foundry flask 4, where the first water seepage filter layer 81 is used to filter the water in the silt in the foundry flask 4, so that the water in the silt permeates the first water seepage filter layer 81 and falls into the water filtering tank 8.

Referring to fig. 9, the middle part of the filtering tank 8 is further horizontally provided with a second water permeable filtering layer 82, the circulation pipe 6 includes a first circulation pipe 62 and a second circulation pipe 63, one end of the first circulation pipe 62 is connected to the center of the vortex of the bottom surface of the seawater tank 1, and the other end of the first circulation pipe 62 is connected to the lower side of the filtering tank 8; one end of the second circulation pipe 63 is connected to the upper side of the water filtering tank 8 between the first and second water permeable filter layers 81 and 82, and the other end of the second circulation pipe 63 extends to the upper side of the seawater tank 1 and is connected to the communication pipe 53 of the supporting ring 51. The circulation member 61 may be provided one at the second circulation pipe 63, or may be provided in two, and is fixed to the first circulation pipe 62 and the second circulation pipe 63, respectively.

Referring to fig. 9, the water contained in the sludge in the drag flask 4 will permeate and filter through the first permeable filtering layer 81 and then fall to the lower side of the first permeable filtering layer 81 in the water filtering tank 8, meanwhile, when the first circulation pipe 62 pumps the water flow to the water filtering tank 8, the impurities in the water will be blocked below the second permeable filtering layer 82, at this time, the impurities in the water flow between the first permeable filtering layer 81 and the second permeable filtering layer 82 in the water filtering tank 8 will be greatly reduced, and then the water flow filtered in the water filtering tank 8 can be returned to the sea water pond 1 through the second circulation pipe 63 again through the second circulation pipe 63 for filtration again.

Furthermore, the water filtering tank 8 can be directly used as a high-pressure water supply component, namely, the second water supply pipe and the first water supply pipe are combined and then connected with a water pump, and the water inlet end of the water pump is connected to the position, between the first water seepage filtering layer 81 and the second water seepage filtering layer 82, of the water filtering tank 8. Thus, the water filtered in the water filtering tank 8 can be pumped to the first water supply pipe and the second water supply pipe for use by the water pump, and circulation is realized.

The implementation principle of the seawater desalination pretreatment system in the embodiment of the application is as follows: after the seawater is put into the seawater tank 1, the isolation net belt 12 is matched with the grid baffle plate 11, so that on one hand, the seawater can be put into the seawater tank 1 to isolate the floaters such as seaweed and enteromorpha, and on the other hand, the floaters such as seaweed and enteromorpha on the upper side of the isolation net belt 12 can be sent out to the water returning tank by driving the isolation net belt 12 along with the continuous rotation of the first driving element.

After filtering the floaters such as seaweed and enteromorpha through the isolation net belt 12, the muddy sand carried in the sea water pond 1 enters the sea water pond 1 together, at this time, as the two sides of the mesh conveyer belt 2 are attached to the two sides of the sea water pond 1, and the inner surface of the mesh conveyer belt 2 is attached to the filter membrane 3, when water flows through the mesh conveyer belt 2, the seawater is filtered through the filter membrane 3, the muddy sand in the seawater is blocked to one side of the mesh conveyer belt 2 close to the feeding of the sea water pond 1, and meanwhile, the continuous rotation of the mesh conveyer belt 2 can continuously convey the muddy sand in the sea water pond 1 into the sand bearing box 4 to realize the throwing of the muddy sand, so that the muddy sand in the sea water pond 1 is prevented from being too much.

The seawater filtered by the mesh conveyer belt 2 in the seawater pond 1 is swirled in the seawater pond 1 under the action of the vortex generating device 5, at the moment, the residual impurities in the seawater pond 1 are coiled into the center of the vortex, meanwhile, the circulating element 61 is started, the impurities in the center of the vortex can be simultaneously pumped away in the seawater and then returned to the seawater pond 1, in the process, as the impurities are coiled into the center of the vortex of the seawater pond 1, the impurity amount at the outer side of the vortex of the seawater pond 1 is greatly reduced, at the moment, the water flow at the outer side of the vortex of the seawater pond 1 can be sent out through the drain pipe 7, so that the secondary filtration of the seawater is realized, and finally the filtered seawater is discharged.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A seawater desalination pretreatment system, comprising:

a sea pool (1);

the sand bearing box (4) is fixed on one side above the sea water pool (1);

mesh conveyer belt (2), but continuous rotation sets up in sea chest (1), the both sides limit of mesh conveyer belt (2) all laminates in the both sides wall in sea chest (1), includes:

the first conveying section (21) is vertically attached to the vertical wall of the water inlet end of the seawater pond (1);

the second conveying section (22) is obliquely arranged in the sea water tank (1), the lower end of the second conveying section (22) is connected with the first conveying section (21), and the upper end of the second conveying section (21) extends into the sand bearing box (4);

the filter membrane (3) is adhered to the inner surface of the mesh conveyor belt (2), the filter membrane (3) is an annular filter belt, and the filter membrane (3) can slide on the mesh conveyor belt (2) relative to the inner surface of the mesh conveyor belt (2) along the rotation direction of the mesh conveyor belt (2);

the lower conveying roller (13) is rotatably arranged in the sea water tank (1), and one end, deviating from the drag flask (4), of the filter membrane (3) and the mesh conveying belt (2) is sleeved on the lower conveying roller (13);

the unidirectional toothed ring (17) is rotatably arranged at the end part of the lower conveying roller (13), the width of two sides of the mesh conveying belt (2) is larger than that of the filter membrane (3), and slots (23) are formed on two sides of the inner surface of the mesh conveying belt (2) and are used for being matched with the unidirectional toothed ring (17);

the second pawl (131) is arranged on the lower conveying roller (13) and is used for driving the unidirectional toothed ring (17) to synchronously rotate along with the lower conveying roller (13) so as to enable the filter membrane (3) to move towards the sand bearing box (4) along with the upper side of the mesh conveying belt (2);

the cleaning component is arranged on the sand bearing box (4) and is used for spraying water to the mesh conveyor belt (2) from the inside and the outside of the mesh conveyor belt (2);

the outer end surface of the unidirectional toothed ring (17) is coaxially formed with an annular tooth groove (171), and a first pawl (172) is arranged on the outer side of the seawater pool (1) and matched with the annular tooth groove (171), so that the unidirectional toothed ring (17) can only drive the upper side of the mesh conveyer belt (2) to rotate towards the direction of the sand bearing box (4);

the ratchet groove (173) is formed on the inner peripheral surface of the unidirectional toothed ring (17) coaxially, the second pawl (131) is further arranged at the end part of the lower conveying roller (13), and the second pawl (131) is matched with the ratchet groove (173), so that when the lower conveying roller (13) rotates towards the direction in which the unidirectional toothed ring (17) can rotate, the unidirectional toothed ring (17) can synchronously rotate along with the lower conveying roller (13), and when the lower conveying roller (13) rotates towards the direction in which the unidirectional toothed ring (17) cannot rotate, the lower conveying roller (13) can separate from the unidirectional toothed ring (17) to independently rotate.

2. A desalination pretreatment system as defined in claim 1, wherein: further comprises:

go up conveying roller (14), rotate and set up in drag flask (4), mesh conveyer belt (2) upper end cover is located and is gone up conveying roller (14), cleaning element includes:

the water cavity is formed in the upper conveying roller (14), and a plurality of water spray holes (141) are formed in the peripheral surface of the upper conveying roller (14);

the second water supply pipe is arranged at one side of the sand bearing box (4) and is used for supplying water to the water cavity of the upper conveying roller (14).

3. A desalination pretreatment system as defined in claim 1, wherein: the outer surface of the mesh conveyor belt (2) is fixedly provided with a plurality of sponge barrier strips (24) which are perpendicular to the conveying direction of the mesh conveyor belt (2).

4. A desalination pretreatment system as defined in claim 1, wherein: further comprises:

the vortex generating device (5) is arranged at one side of the seawater pool (1) which is opposite to the seawater pool (1) and is opposite to the seawater inlet of the seawater pool (1) corresponding to the mesh conveyer belt (2);

the lower end of the circulating pipe (6) is arranged on the bottom surface of the seawater pool (1) and is positioned at the center of vortex generated by the vortex generating device (5), and the upper end of the circulating pipe (6) extends to the upper side of the seawater pool (1);

a circulation member (61) provided to the circulation pipe (6) for feeding water from a lower end of the circulation pipe (6) to an upper end of the circulation pipe (6);

and a drain pipe (7) communicated with the side wall of the seawater pool (1) at one side provided with the vortex generating device (5).

5. A desalination pretreatment system as defined in claim 4, wherein: the vortex generating device (5) comprises:

the support ring (51) is horizontally arranged in the sea water tank (1), and a containing cavity is arranged in the support ring (51) and is used for being connected with the upper end of the circulating pipe (6);

a plurality of tangential spray heads (52) fixed along the tangential direction of the support ring (51) and communicating with the support ring (51).

6. A desalination pretreatment system as defined in claim 4, wherein: further comprises:

a water filtering tank (8) fixed and communicated with the lower side of the sand box (4);

a first seepage filtering layer (81) arranged between the sand bearing box (4) and the filtering water tank (8);

the second water seepage filter layer (82) is arranged below the corresponding first water seepage filter layer (81) in the sand bearing box (4);

the circulation pipe (6) includes:

the first circulating pipe (62) is connected to the lower side of the seawater pool (1) and the lower side of the second water seepage filtering layer (82) corresponding to the water filtering tank (8);

the second circulating pipe (63) is connected to the upper side of the seawater pool (1) and the position between the first seepage filtering layer (81) and the second seepage filtering layer (82) corresponding to the water filtering tank (8), and the circulating element (61) is arranged on the second circulating pipe (63).

7. A desalination pretreatment system as defined in claim 1, wherein: further comprises:

the grid baffle plate (11) is inserted into the water inlet end of the sea water tank (1), the upper side of the grid baffle plate (11) protrudes out of the liquid level of the sea water tank (1), and a gap is formed between the lower side of the grid baffle plate (11) and the upper side of the mesh conveyer belt (2).

8. A desalination pretreatment system as defined in claim 6, wherein: further comprises:

the driving roller (121) is rotatably arranged on the upper side of one water inlet end of the seawater pool (1),

the driven roller (122) is rotatably arranged on one side of the grid baffle (11) close to the driving roller (121), and the driven roller (122) is positioned below the liquid level of the sea pool (1);

and the isolation net belt (12) is sleeved between the driving roller (121) and the driven roller (122).