CN115872505A - Seawater desalination impurity pretreatment assembly, system and process - Google Patents
Seawater desalination impurity pretreatment assembly, system and process Download PDFInfo
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- CN115872505A CN115872505A CN202211598723.7A CN202211598723A CN115872505A CN 115872505 A CN115872505 A CN 115872505A CN 202211598723 A CN202211598723 A CN 202211598723A CN 115872505 A CN115872505 A CN 115872505A
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Abstract
The application belongs to the field of seawater desalination, and particularly relates to a seawater desalination impurity pretreatment assembly, a system and a process, wherein the seawater desalination impurity pretreatment assembly comprises a pretreatment tank, and a flocculation tank and an air flotation tank which are sequentially communicated are arranged in the pretreatment tank; an aeration disc is arranged in the flocculation tank, bubbles are generated by the aeration disc and are attached to part of impurities in the seawater, so that the impurities with the density less than that of the seawater float up to the surface of the seawater to form scum, and the impurities with the density more than that of the seawater sink to the bottom to form sludge; the upper end of the floatation tank is communicated with the upper end of the flocculation tank, so that scum drifts to the upper surface of the floatation tank; the flocculation tank and the bottom of the air floatation tank are respectively communicated with a sedimentation part; one side of the air flotation tank is provided with an air flotation Chi Fuzha channel of the air flotation tank, and an upper outlet of the scum channel is communicated with an upper outlet of the air flotation tank; the invention has reasonable design, compact structure and convenient use.
Description
Technical Field
The application relates to the field of seawater desalination pretreatment, in particular to a seawater desalination impurity pretreatment assembly, system and process.
Background
In the prior seawater desalination pretreatment, impurities are generally treated by air flotation, and the process generally comprises aeration flocculation in seawater by an air flotation process to realize impurity nucleation, wherein impurities with high density are used as sludge and can sink to the bottom of a tank, and impurities with small sealing can form scum to float to the surface of seawater.
For impurities, floating scum is generally fished by a screen, but the floating scum floats to the periphery because the screen enters and exits the seawater and causes the shifting of the water surface, so that the impurities at the corners cannot be treated for a long time and deteriorate to pollute the seawater to be desalinated. The settled sludge is generally discharged together with seawater through a long-distance pipeline, but after a blowdown pipeline valve is closed, the flow rate of finally discharged sewage can be reduced, so that the sludge is deposited in the pipeline, and the blowdown pipeline is opened at regular time, so that the sludge is attached, even organisms are bred and attached, and the pipeline is inconvenient to clean at the later stage and even blocked.
Aiming at the technical problems of incomplete impurity cleaning, high difficulty, low efficiency and the like existing in the conventional air floatation pretreatment process, how to realize high-efficiency cleaning and reduce the later shutdown maintenance time, the invention provides an effective scheme, which can effectively treat impurities and avoid the influence of scum and sludge generated by the impurities on an air floatation tank. .
Disclosure of Invention
In order to solve a plurality of problems of impurity cleaning in seawater desalination pretreatment, the application provides a seawater desalination impurity pretreatment assembly, a system and a process, and the following technical scheme is adopted:
in order to solve the problem of impurities in seawater desalination pretreatment, the seawater desalination impurity pretreatment assembly comprises a pretreatment tank, wherein a flocculation tank and an air flotation tank which are sequentially communicated are arranged in the pretreatment tank; thereby realizing the sinking treatment with large density and the air floatation treatment with small density, and further realizing the pretreatment.
In order to generate the bubble treatment effect, an aeration disc is arranged in the flocculation tank, bubbles are generated by the aeration disc and are attached to part of impurities in the seawater, so that the impurities with the density less than that of the seawater float up on the surface of the seawater to form scum, and the impurities with the density more than that of the seawater sink at the bottom to form sludge;
in order to realize multi-stage separation, the upper end of the floatation tank is communicated with the upper end of the flocculation tank, so that scum drifts to the upper surface of the floatation tank;
the flocculation tank and the bottom of the air floatation tank are respectively communicated with a sedimentation part;
in order to realize the separation of scum from seawater, a scum channel is arranged on one side of the air floatation tank, and an upper outlet of the scum channel is communicated with an upper outlet of the air floatation tank;
a slag scraper is arranged above the air flotation tank and the scum ditch;
in order to realize better extraction of scum, the scum scraper comprises a scraper chain assembly, and the scraper chain assembly is provided with a scum scraping section and a scum upwards conveying section which are connected in a circulating manner; the scum scraping section is positioned at the upper part of the air flotation tank; two ends of the scum feeding section are respectively positioned above the floatation tank and the scum ditch groove;
the scum output end of the scum feeding section of the scum scraper is arranged above the scum ditch groove.
As a further improvement of the above technical solution:
in order to realize the cycle work, a plurality of scum removing components are respectively arranged on the scraper chain components, the scum removing components are immersed in seawater in the floatation tank, scum is fished from the floatation tank, and the scum is sent into a scum canal trough at the scum output end;
in order to prevent the attached scum from being brought into the seawater again, the scum output end is provided with a blowing hole blowing towards the scraper chain assembly, and the blowing hole is used for blowing the scum attached to the scraper chain assembly to remove;
in the process of fishing the scum, in order to avoid the scum from falling in the midway, a scraper guide inclined plane is inclined and arranged at the top of the wall of the cofferdam part between the floatation tank and the scum channel.
In order to realize the stable separation of scum, a process scraping groove is longitudinally arranged on the guide inclined plane of the scraper, and an opening is arranged at the upper end of the inclined process scraping groove; the lower input end of the scraper guide inclined plane is immersed in the seawater of the floatation tank, and the upper output end is positioned above the scum ditch groove.
In order to reduce the accumulation of scum to corners due to fluctuation, the scum removing assembly comprises a support hinged seat arranged on the scraper chain assembly, scum scraping grippers used for at least entering seawater of the floatation tank at a scum scraping section are hinged on the support hinged seat, and a return spring is arranged between the support hinged seat and the scum scraping grippers; when the scum scraping tongs travel on the scum feeding section, the ends of the scum scraping tongs enter the corresponding process scraping grooves;
an air floating pad is arranged on the scum scraping tongs.
In order to avoid timely cleaning treatment of scum, a scum output system is arranged above the scum channel; the scum output system comprises a floating ball fishing rotary roller which is arranged in a rotating way; floating ball taking-out mesh hooks are distributed on the floating ball fishing rotary roller and rotate at a floating ball fishing station and a floating ball output station; the floating ball fishing station is arranged in the scum channel; the floating ball output station is arranged above the scum channel;
the floating ball taking-out net-shaped hook is L-shaped, the lower surface of a transverse plate of the floating ball taking-out net-shaped hook is tangentially arranged on the outer side wall of the floating ball fishing rotating roller, a floating ball storage part is arranged obliquely below the output end of the floating ball taking-out net-shaped hook, and the floating ball storage part is separated from the rotating floating ball taking-out net-shaped hook;
at the floating ball fishing station, the floating ball is taken out of the floating ball component which is meshed with the hook and fished the floating slag in the floating slag channel; at the floating ball output station, the floating ball component takes out the mesh-shaped hook from the floating ball and rolls to the floating ball storage part;
in order to realize the gathering of scum and the gathering of core, a floating ball component is put into the air flotation tank; the floating ball component comprises a central ball body, wherein the central ball body is symmetrically or asymmetrically provided with distributed side arc pieces, and the central ball body is distributed with adsorption needle-shaped bulges.
In order to avoid the sludge from blocking the output pipeline, a sludge discharge output system is arranged at the settling part; the middle or bottom outlet of the air floatation tank is communicated with a main water outlet channel through a baffling channel; the sludge discharge output system comprises a sludge output pipeline laid at the bottom of the air floatation tank and/or the flocculation tank;
intermediate building pipelines are arranged among the sludge output pipelines connected with each other;
in order to improve the installation manufacturability, a spherical conical head which is sealed with the inner spherical end surface of the corresponding sludge output pipeline is arranged at the end part of the pipeline established in the middle;
as theoretical improvement, the collection of the attached sludge is realized, and a fan wheel is arranged in an inner cavity of the middle built pipeline;
a feeding air flow pipeline and/or a floating ball input pipeline are connected to the middle erection pipeline; the floating ball input pipeline is connected with an auger output part and used for pushing the floating ball into the floating ball input pipeline.
The seawater desalination pretreatment system comprises a seawater desalination impurity pretreatment component.
As a specific implementation process, a seawater desalination pretreatment process, which executes the following steps by means of a seawater desalination pretreatment system;
step one, seawater to be desalinated enters a pretreatment tank;
aerating in a flocculation tank, flocculating floating slag in the seawater, and precipitating sinking impurities to form sludge;
and step three, the flocculated seawater enters an air floatation tank, the seawater is kept stand to realize floating slag and sinking sludge separation, and scum is fished from the air floatation tank by a scum scraper and enters a scum ditch groove from a scum output end.
The present invention is through an improvement over existing pretreatment. Can effectively remove enteromorpha, oil stain, floating organisms and the like, and improves the efficiency and the quality of seawater pretreatment. The invention improves the pretreatment working section, thereby effectively solving the problem of impurity treatment and simultaneously solving the problem of treatment of sediment and scum generated by impurities. The invention outputs water in the middle of the air floatation tank, thereby avoiding the entering of scum and sludge.
Drawings
FIG. 1 is a schematic diagram of a preferred pretreatment configuration.
FIG. 2 is a schematic diagram of a preferred air flotation tank structure.
Fig. 3 is a schematic view of a preferred slag scraper construction.
Fig. 4 is a schematic perspective view of a preferred float fishing station.
Figure 5 is a schematic view of a preferred scumming gripper configuration.
Fig. 6 is another side view of the preferred dross scraping grip.
Fig. 7 is a schematic view of a preferred floating ball member structure.
FIG. 8 is a view showing a construction configuration of pretreatment.
FIG. 9 is a side view partially schematic of a preferred pretreatment option.
Fig. 10 is a schematic diagram of a preferred sludge outlet line configuration.
FIG. 11 is a schematic view of the preferred auger output configuration.
Fig. 12 is a schematic structural view of an embodiment of a preferred flapwheel.
Fig. 13 is a block diagram of another embodiment of the preferred fanning wheel.
Wherein, 1, a pretreatment pool; 3. A flocculation tank; 4. an air floatation tank; 6. A settling section; 13. a scum trench; 14. a slag scraper; 15. a deflection channel; 16. a main water outlet channel; 18. a scum output system; 20. A sludge discharge output system; 21. an aeration disc; 22. a perforated partition plate; 23. a scraper chain assembly; 24. a descumming assembly; 25. a scraper guide slope; 35. a scum scraping section; 36. a scum up-sending section; 37. a scum output end; 38. a process groove is scraped; 39. a float ball storage section; 40. taking out the net-shaped hook from the floating ball; 41. a float ball member; 42. a central sphere; 43. a side arc sheet; 44. adsorbing the needle-shaped protrusions; 45. an auger output section; 46. a sludge output pipeline; 47. feeding into an air flow pipeline; 48. a floating ball input pipeline; 49. a pipeline is built in the middle; 50. a fan wheel; 51. a spherical conical head; 52. supporting the hinge seat; 53. a scum scraping gripper; 54. a return spring; 55. an air-bearing cushion; 56. a floating ball fishing station; 57. and the floating ball outputs the station.
Detailed Description
The present application is described in further detail below with reference to figures 1-13. The present invention is mainly described in relation to the point of the invention, such as valves, piping, covers, overhead vehicles, electrical circuits, fire fighting, etc. are omitted. The invention mainly aims at the application of a seawater desalination pretreatment working section of coastal cities such as Qingdao and the like.
As shown in fig. 1 to 13, the seawater desalination impurity pretreatment module of the present embodiment includes a cofferdam for storing seawater, which adopts a concrete cast structure; the cofferdam part is provided with the following components which are communicated through a pipeline, a cement pool and the like.
The pretreatment tank 1 is accessed with seawater resources such as a seawater lake and is used for entering seawater to be desalinated;
in order to remove physical impurities in seawater conveniently, a pretreatment system can add a medicament into the seawater and stir the seawater to realize full contact and adhesion, a flocculation tank 3 is filled with the medicament and is connected with an output pipeline of a medicament adding part to flocculate the seawater and precipitate sinking impurities;
an upper inlet of the air flotation tank 4 is communicated with an upturning outlet of the flocculation tank 3; in the air flotation tank 4, scum is treated, and meanwhile, sediment sinking is realized through standing, so that pretreatment of seawater is realized.
The above structure is preferably a snake path structure which is communicated up and down.
The sedimentation part 6 is communicated with a lower outlet of the air flotation tank 4, and can be directly or indirectly communicated, and the lower outlet is preferably a middle lower part, so that the seawater communication after the upper part and the lower part are separated is realized.
As a specific structural introduction, an overflow channel is arranged on one side of the pretreatment tank 1, so that overflow is realized and overflow is avoided; a channel gate valve is arranged in the cofferdam part and can be automatically controlled, manual or other controls; the lower outlet of the air floatation tank 4 is communicated with a main water outlet channel 16 through a baffling channel 15, the bottom of the main water outlet channel 16 can also be communicated with a settling part 6, and the settling part 6 is mainly used for standing and storing the seawater after flocculation and air floatation treatment; the subsequent processes such as reverse osmosis and the like can be connected subsequently.
Preferably, the dosing part comprises a matched service water pipeline, a PAM dosing part, a PAC dosing part and/or a standby dosing part and the like which are arranged conventionally, so that seawater is flocculated.
An aeration tray 21 having an aeration tray to generate bubbles is provided in the flocculation tank 3; the aeration disc 21 is connected with an air pressure pipeline 19; the aeration disc 21 is used for feeding air and/or ozone, so that purification is realized and the flocculation effect is increased;
a sludge discharge output system 20 is arranged at the bottom of the flocculation tank 3 and/or the air floatation tank 4; thereby achieving the discharge of the precipitate.
The sludge discharge system 20 includes a sludge discharge line 46 laid at the bottom of the cofferdam portion;
an intermediate building line 49 is provided between the several connected sludge outlet lines 46; therefore, adjacent pipelines are connected, and the pipelines are conveniently connected and repaired, so that transition parts are conveniently added.
As a further improvement, the end of the intermediate establishing pipe 49 is provided with a spherical conical head 51 which is sealed with the inner spherical end surface of the corresponding sludge output pipe 46; realize multi-angle through the tapering to solve the problem that the pipeline needs higher axiality, realized flexonics.
As a theoretical improvement, a fan impeller 50 is arranged in the inner cavity of the middle building pipeline 49, and when seawater flows, the flow of the seawater can drive the fan impeller 50, so that the turbulence degree of the seawater in the pipeline is increased, and sediment is prevented from being deposited;
to further avoid clogging by deposits, large pipes are preferred, preferably with a feed gas line 47 and/or a float input line 48 connected to the intermediate build-up line 49; the air flow is introduced theoretically, but the existence of air bubbles can influence the forward movement of sewage, so that the scheme is selected for the second time. In theory, the density of the floating balls is close to that of water, so that the floating balls are convenient to suspend, the side wall is better scraped and washed in the pipeline, and precipitates are avoided and cleaned in time. The float input line 48 is connected to an auger output 45 for pushing the float into the float input line 48.
In the seawater desalination impurity pretreatment assembly of the embodiment, the air flotation assembly comprises an air flotation tank 4 arranged in the cofferdam part for treating scum; when the dross clearance of design before, in the in-service use, when pulling away the dross, the tongs can produce the ripple undulant for the dross can scatter to the distant place, simultaneously, also can descend to the depth of water department, thereby reduces the dross and salvages efficiency.
In order to collect scum, a scum channel 13 is arranged on one side of the air floatation tank 4, and an upper outlet of the scum channel 13 is communicated with an upper outlet of the air floatation tank 4;
in order to improve the scum collection efficiency and improve automation and mechanization, a scum scraper 14 is arranged above the floatation tank 4 and the scum channel 13 in a walking way.
As a description of a preferred mechanism, the scum scraper 14 comprises a scraper chain assembly 23, which has a simple structure and good flexibility and can adjust the conveying direction, and the scraper chain assembly 23 is provided with a scum scraping section 35 and a scum upward conveying section 36 which are circularly connected; the scum scraping section 35 is positioned on the cofferdam wall at the upper part of the air floatation tank 4, so that scum is conveniently fished; two ends of the scum up-feeding section 36 are respectively positioned above the air flotation tank 4 and the scum channel 13, so that the scum and seawater separation effect is better, and the scum is reduced from falling;
the scum output end 37 of the scum feeding section 36 of the scum scraper 14 is above the scum canal 13.
A plurality of scum removing assemblies 24 are respectively arranged on the scraper chain assemblies 23, so that the circulating continuous work is realized, and the scum is fished from the floatation tank 4 and is sent into the scum channel 13 at a scum output end 37; preferably, a blow hole is provided at the scum output 37 for blowing off the scum attached to the scraper chain assembly 23 to prevent the scum from returning back into the sea water with the circulating gripper;
in order to improve the manufacturability and avoid the scum from falling, a scraper guide inclined plane 25 is arranged at the top of the wall of the cofferdam part between the air floatation tank 4 and the scum channel 13; thereby causing the gripper to rise steadily and diagonally away from the water.
A process scraping groove 38 is arranged on the scraper guide inclined plane 25, and the upper end of the inclined process scraping groove 38 is opened; the lower end of the scraper guide inclined plane 25 is immersed in seawater, and the gripper enters the groove, so that the gripper is prevented from contacting the inclined plane, friction is reduced, noise is reduced, and scum moves forwards on the inclined plane.
As a further improvement, the above-mentioned gripper is fixedly arranged, and at the output station, the gripper is obliquely arranged, so that the scum is not easy to drop, and as an improvement to this problem, the scum removing assembly 24 includes a support hinge seat 52 mounted on the scraper chain assembly 23, a scum scraping gripper 53 for entering the scum at least at the scum scraping section 35 into the seawater is hinged on the support hinge seat 52, and a return spring 54 is arranged between the support hinge seat 52 and the scum scraping gripper 53; when the scum scraping tongs 53 walk on the scum feeding section 36, the ends of the scum scraping tongs 53 enter the corresponding process scraping grooves 38; the gripper is arranged at the output part, realizes automatic sagging due to the self weight and the spring, and realizes repeated oscillation under the action of the spring, so that the better automatic cleaning of the scum is realized. Interference with the seawater is reduced by the hand grab. The fingers of the hand grab are arranged in the groove, so that interference is reduced, noise is reduced, and scum is better removed.
In order to improve the floating effect, an air floating cushion 55 can be arranged on the scum scraping tongs 53, and the floating effect can be realized by adjusting the inflation of the air floating air bag.
A scum output system 18 is arranged above the scum channel 13; the scum output system 18 comprises a floating ball fishing rotary roller which is arranged in a rotary manner; the floating ball fetching mesh-shaped hook 40 is distributed on the floating ball fetching rotary roller, and the floating ball fetching mesh-shaped hook 40 rotates at the floating ball fetching station 56 and the floating ball output station 57, so that floating balls are collected. The dross output system 18 can be the extraction line system of fig. 7, or it can be configured as shown in fig. 1-4.
The floating ball taking-out reticular hooked hand 40 is L-shaped, so that floating balls can be fished better, floating balls are prevented from being accumulated at the center as an improvement on the prior art, the lower surface of a transverse plate of the floating ball taking-out reticular hooked hand 40 is tangentially arranged on the outer side wall of the floating ball fishing and rotating roller, a floating ball storage part 39 is arranged obliquely below the output end of the floating ball taking-out reticular hooked hand 40, and the floating ball storage part 39 is separated from the rotating floating ball taking-out reticular hooked hand 40;
at the floating ball fishing station 56, the floating ball taking out mesh-shaped hook 40 catches the floating ball part 41 attached with the floating slag in the floating slag channel 13; at the float ball output station 57, the float ball component 41 takes out the reticular hook 40 from the float ball and rolls down to the float ball storage part 39; thereby realizing the automatic and efficient fishing of the floating ball.
Aiming at tiny, oil stain, suspended matters, flocculate and the like, the floating ball component 41 is put into the air floatation tank 4 to realize adhesion polymerization; the floating ball component 41 comprises a central ball body 42, wherein the central ball body 42 is symmetrically or asymmetrically provided with distributed side arc sheets 43, and the central ball body 42 is distributed with adsorption needle-shaped bulges 44. The floating ball is of a symmetrical structure, is convenient to manufacture, avoids the floating ball from rotating in situ through an asymmetrical structure, can be of a soft-hard combination structure through the needle-shaped bulges, and is preferably of a plant fiber or metal structure. Scum can be effectively adsorbed through the plant fibers, and a large amount of scum can be attached through the metal needles.
Referring to fig. 1-13, an implementation principle of the seawater desalination impurity pretreatment module, system and process is preferred, which can be used alone or in combination as a preference when used by a user, and the seawater desalination pretreatment process of the present embodiment performs the following steps by means of the seawater desalination pretreatment system;
firstly, seawater to be desalinated passes through a pretreatment tank 1 and enters a flocculation tank 3 through a stirring part; it is a conventional procedure.
Step two, adding a medicament into the flocculation tank 3, aerating, flocculating the seawater, and precipitating sinking impurities;
as an innovation, in the third step, the flocculated seawater enters the floatation tank 4, the seawater is kept stand to realize floating scum and sludge sinking separation, scum is fished by the scum scraping machine 14 from the floatation tank 4 and enters the scum channel 13 from the scum output end 37, and the descummed seawater enters the settling part 6 to be kept stand, so that automatic and efficient scum clearing is realized.
As an innovation, in the third step, in the scum removing process, firstly, in the scum scraping section 35, the scum scraping hand 53 enters the floatation tank 4 and floats upwards against the spring force of the return spring 54 and the self gravity, so that scum is fished; then, the scum scraping hand 53 enters and ascends along the process scraping bath 38 to the scum channel 13 along with the scum ascending section 36, and the scum scraping hand 53 swings downward under the action of gravity and the spring force of the return spring 54, so that the scum falls down into the scum channel 13;
as an innovation, in the fourth step, the floating ball salvaging rotary roller rotates, firstly, in the floating ball salvaging station 56, the floating ball taking out reticular hitching 40 salvages the floating ball part 41 attached with the floating slag in the floating slag channel 13; then, at the float output station 57, the float member 41 rolls off the mesh catch 40 from the float to the float storage part 39; thereby realizing the collection of the scum. The floating ball is sent to the outside for recycling or waste treatment.
Wherein, the floating ball component 41 is put into the air flotation tank 4, the adsorption needle-shaped bulge 44 is used for adsorbing scum, and the floating ball component 41 is prevented from rotating in situ by the asymmetrically arranged distributed side arc sheets 43; therefore, effective and cyclic treatment is realized, and the phenomenon that individual floating balls rotate and cannot be collected is avoided.
Step five, the settled sludge enters a sludge output pipeline 46, a feeding air pipeline 47 and/or a floating ball input pipeline 48 is started to be fed into a floating ball component 41 distributed by an air flow and/or screw conveyor output part 45, and the sludge generates turbulence along with the seawater under the action of a vane wheel 50, the air flow and/or the floating ball component 41, so that the settled sludge is driven to be output; thereby generating turbulence to avoid precipitation of the precipitates.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a sea water desalination impurity preliminary treatment subassembly which characterized in that: comprises a pretreatment tank (1), wherein a flocculation tank (3) and an air flotation tank (4) which are sequentially communicated are arranged in the pretreatment tank (1);
an aeration disc (21) is arranged in the flocculation tank (3), the aeration disc (21) generates bubbles, the bubbles are attached to part of impurities in the seawater, so that the impurities with the density less than that of the seawater float up on the surface of the seawater to form scum, and the impurities with the density more than that of the seawater sink at the bottom to form sludge;
the upper end of the floatation tank (4) is communicated with the upper end of the flocculation tank (3) so that scum can float to the upper surface of the floatation tank (4);
a sedimentation part (6) is respectively communicated with the bottoms of the flocculation tank (3) and the air floatation tank (4) in the air floatation tank (4);
a scum channel (13) is arranged on one side of the air floatation tank (4), and an upper outlet of the scum channel (13) is communicated with an upper outlet of the air floatation tank (4);
a slag scraper (14) is arranged above the air floatation tank (4) and the scum ditch groove (13);
the scum scraper (14) comprises a scraper chain assembly (23), and the scraper chain assembly (23) is provided with a scum scraping section (35) and a scum uploading section (36) which are connected in a circulating manner; the scum scraping section (35) is positioned at the upper part of the air floatation tank (4); two ends of the scum up-feeding section (36) are respectively positioned above the air flotation tank (4) and the scum ditch groove (13);
the scum output end (37) of the scum feeding section (36) of the scum scraper (14) is arranged above the scum channel (13).
2. The seawater desalination impurity pretreatment module of claim 1, wherein: a plurality of scum removing assemblies (24) are respectively arranged on the scraper chain assembly (23), the scum removing assemblies (24) are immersed in seawater in the floatation tank (4), scum is fished from the floatation tank (4), and the scum is sent into a scum channel (13) at a scum output end (37);
the scum output end (37) is provided with a blowing hole which blows to the scraper chain assembly (23) and is used for blowing and removing the scum attached to the scraper chain assembly (23);
a scraper guide inclined plane (25) is arranged between the air flotation tank (4) and the scum channel groove (13) and is inclined to the top of the wall of the cofferdam part.
3. The seawater desalination impurity pretreatment assembly of claim 2, wherein: a process scraping groove (38) is longitudinally arranged on the scraper guide inclined plane (25), and an opening is formed in the upper end of the inclined process scraping groove (38); the lower input end of the scraper guiding inclined plane (25) is immersed in the seawater of the floatation tank (4) and the upper output end is positioned above the scum ditch groove (13).
4. The seawater desalination impurity pretreatment assembly of claim 3, wherein: the scum removing assembly (24) comprises a supporting hinged seat (52) arranged on the scraper chain assembly (23), a scum scraping hand grip (53) used for entering seawater of the floatation tank (4) at least at the scum scraping section (35) is hinged on the supporting hinged seat (52), and a return spring (54) is arranged between the supporting hinged seat (52) and the scum scraping hand grip (53); when the scum scraping grippers (53) walk on the scum feeding section (36), the ends of the scum scraping grippers (53) enter the corresponding process scraping grooves (38);
an air floating cushion (55) is arranged on the scum scraping gripper (53).
5. The seawater desalination impurity pretreatment module of claim 4, wherein: a scum output system (18) is arranged above the scum channel (13); the scum output system (18) comprises a floating ball fishing rotary roller which is arranged in a rotating way; a floating ball taking-out net-shaped hooking hand (40) is distributed on the floating ball fishing rotary roller, and the floating ball taking-out net-shaped hooking hand (40) rotates to a floating ball fishing station (56) and a floating ball output station (57); a floating ball fishing station (56) in the scum channel (13);
a floating ball output station (57) above the scum channel (13);
the floating ball taking-out net-shaped hook (40) is L-shaped, the lower surface of a transverse plate of the floating ball taking-out net-shaped hook (40) is tangentially arranged on the outer side wall of the floating ball taking-out rotary roller, a floating ball storage part (39) is arranged obliquely below the output end of the floating ball taking-out net-shaped hook (40), and the floating ball storage part (39) is separated from the rotary floating ball taking-out net-shaped hook (40);
in the floating ball fishing station (56), the floating ball taking out reticular hook (40) catches the floating ball part (41) attached with floating slag in the floating slag channel (13); at a floating ball output station (57), the floating ball part (41) takes out the reticular hook (40) from the floating ball and rolls to the floating ball storage part (39);
a floating ball component (41) is thrown into the air flotation tank (4); the floating ball component (41) comprises a central ball body (42), the central ball body (42) is symmetrically or asymmetrically provided with distributed side arc sheets (43), and the central ball body (42) is distributed with adsorption needle-shaped bulges (44).
6. The seawater desalination impurity pretreatment module of any one of claims 1 to 5, wherein: a sludge discharge output system (20) is arranged at the sedimentation part (6); the middle part or the bottom outlet of the air floatation tank (4) is communicated with a main water outlet channel (16) through a baffling channel (15); the sludge discharge output system (20) comprises a sludge output pipeline (46) laid at the bottom of the air flotation tank (4) and/or the flocculation tank (3);
intermediate building lines (49) are arranged between the connected sludge outlet lines (46);
a spherical conical head (51) which is sealed with the inner spherical end surface of the corresponding sludge output pipeline (46) is arranged at the end part of the middle building pipeline (49);
a fan wheel (50) is arranged in the inner cavity of the middle establishment pipeline (49);
a gas feeding pipeline (47) and/or a floating ball input pipeline (48) are connected to the middle establishing pipeline (49); the floating ball input pipeline (48) is connected with an auger output part (45) and used for pushing a floating ball into the floating ball input pipeline (48).
7. A seawater desalination pretreatment system is characterized in that: comprising a seawater desalination impurity pretreatment module as defined in any one of claims 1 to 6.
8. A seawater desalination pretreatment process is characterized in that: with the seawater desalination pretreatment system of claim 7, performing the following steps;
firstly, seawater to be desalinated enters a pretreatment tank (1);
aerating in a flocculation tank (3), flocculating floating slag in the seawater, and precipitating sinking impurities to form sludge;
and step three, the flocculated seawater enters an air floatation tank (4), the seawater is kept stand to realize floating dross and sinking separation of sludge, and scum is fished from the air floatation tank (4) by a scum scraper (14) and enters a dross channel (13) from a dross output end (37).
9. The seawater desalination pretreatment process of claim 8, wherein: in the third step, a scum removing process is executed, firstly, in a scum scraping section (35), a scum scraping gripper (53) enters the floatation tank (4) and floats upwards against the spring force of a return spring (54) and the self gravity, so that scum is fished; then, the scum scraping hand (53) enters and moves upwards to the scum channel (13) along the technical scraping groove (38) along with the scum feeding section (36), and under the action of gravity and the spring force of the return spring (54), the scum scraping hand (53) swings downwards, so that scum falls into the scum channel (13) and oscillates under the action of the spring force.
10. The seawater desalination pretreatment process of claim 8, wherein: after the third step, the fourth step is executed, the floating ball fishing rotary roller rotates, firstly, at the floating ball fishing station (56), the floating ball taking-out reticular hook (40) catches the floating ball part (41) attached with the floating ball in the floating ball channel groove (13); then, at a floating ball output station (57), the floating ball component (41) takes out the reticular crochet (40) from the floating ball and rolls to the floating ball storage part (39);
wherein, the floating ball component (41) is put into the air flotation tank (4), the adsorption needle-shaped bulge (44) is used for adsorbing scum, and the floating ball component (41) is prevented from rotating in situ by asymmetrically arranging the distribution side arc sheets (43);
and step five, when bottom sludge needs to be cleaned, a valve is opened, the settled sludge enters a sludge output pipeline (46), a gas flow pipeline (47) and/or a floating ball input pipeline (48) are started, a floating ball component (41) distributed by a gas flow and/or screw conveyor output part (45) is fed, and the sludge generates turbulence along with seawater under the action of a fan impeller (50) and the gas flow and/or the floating ball component (41) to drive the settled sludge to be output.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116282320A (en) * | 2023-04-28 | 2023-06-23 | 无锡海拓环保装备科技有限公司 | Oil-water separation device based on air floatation method |
| CN116675279A (en) * | 2023-07-28 | 2023-09-01 | 湖南和三环保科技有限公司 | Efficient sewage treatment device for sewage treatment and application method thereof |
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2022
- 2022-12-14 CN CN202211598723.7A patent/CN115872505A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116282320A (en) * | 2023-04-28 | 2023-06-23 | 无锡海拓环保装备科技有限公司 | Oil-water separation device based on air floatation method |
| CN116675279A (en) * | 2023-07-28 | 2023-09-01 | 湖南和三环保科技有限公司 | Efficient sewage treatment device for sewage treatment and application method thereof |
| CN116675279B (en) * | 2023-07-28 | 2023-10-31 | 湖南和三环保科技有限公司 | Efficient sewage treatment device for sewage treatment and application method thereof |
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