CN102430271B - Inclined plate type rotational flow sand setting system - Google Patents
Inclined plate type rotational flow sand setting system Download PDFInfo
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- CN102430271B CN102430271B CN 201110285940 CN201110285940A CN102430271B CN 102430271 B CN102430271 B CN 102430271B CN 201110285940 CN201110285940 CN 201110285940 CN 201110285940 A CN201110285940 A CN 201110285940A CN 102430271 B CN102430271 B CN 102430271B
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Abstract
The invention discloses an inclined plate type rotational flow sand setting system. The system which comprises a tank, a sand lifting pipeline vertically arranged in the middle part of the tank and a sand-lifting air-distributing structure is characterized in that: the lower half part of the tank is a sand hopper part, the upper half part of the tank is a sand setting zone, and an inflow port andan outflow port are arranged on the tank; the upper end of the sand lifting pipeline is connected with a sand-water separator; the bottom surface of the sand setting zone is provided with an inclinedplate precipitation structure; the tank is provided with an inner wall jet structure; the lower end of the sand lifting pipeline is provided with a sand lifting pipeline inlet structure; and the sand-lifting air-distributing structure comprises a pressure air pipeline which is vertically arranged and is in parallel with the sand lifting pipeline, the lower port of the pressure air pipeline is transversely communicated with the middle part of a horn body, and the position of the lower port of the pressure air pipeline is higher than the position of the lower inlet of the sand lifting pipeline.The inclined plate rotational flow sand setting system of the invention has the advantages of good sand setting effect, high processing efficiency, low enforcement and maintenance cost (close to no maintenance), good operation continuity, and convenient maintenance and servicing.
Description
Technical field
The present invention relates to a kind of settling system, especially a kind of ramp type sediment by rotational flow system.
Background technology
Settling system is the equipment that is used for going out from the sewage separation and Extraction sand grains in the sewage treatment plant, is called setting pot again.The rotational flow grit chamber that a kind of circular reinforced concrete structure is arranged in existing Yongchuan sewage treatment plant sand setting facility.The structure of this rotational flow grit chamber is, comprises the pond body, and pond body Lower Half is the sand hopper part with conical cavity, pond body the first half be diameter greater than the sand setting district of the cylindrical cavity of sand hopper part, body top in pond has inflow entrance and flow export; Also comprise the sand extraction tube road that vertically is arranged at body middle part, pond, lower end, sand extraction tube road extends to the bottom position that closes on of sand hopper part, upper end, sand extraction tube road is connected with grit water separator, be arranged with the pressure air pipeline outside the sand extraction tube road and form double-decker, pressure air lower end of duct and lower end, sand extraction tube road are tightly connected, the top that described sand extraction tube road inwall is positioned at the described place of being tightly connected is distributed with a circle airport and makes sand extraction tube road and pressure air pipeline UNICOM, form the gas distribution structure, pressure air pipeline upper end with carry the sand source of the gas and be connected the described sand source of the gas employing Roots blower of carrying; Also be provided with vertical agitating device in the body of described pond.
This existing rotational flow grit chamber during its work, adopts earlier vertical agitating device to stir the formation eddy flow, changes the fluidised form of water, and the inorganic sand grains in the sewage is got rid of to pool wall by centrifugal action, and finishes synchronously and separate back precipitation rapidly with organic matter.Piling up more and more thicker sand grains around the pool wall is subjected to centripetal force and gravity effect to import the center sand hopper, the compressed air that the recycling roots blower provides is carried the sand in the sand hopper to grit water separator from the sand extraction tube road with a small amount of sewage and being separated, reach and remove that proportion is greater than 2.65t/m3 in the sewage, particle diameter is greater than the inorganic sand grains purpose of 0.2mm.
There is following defective in this existing spiral-flow type settling system: the power that 1, only depends on agitating device to provide carries out the spiral-flow type sedimentation, and sand fallout efficient is lower, causes treatment effect relatively poor.2, the generation of eddy flow will rely on the agitating device of setting, and cost is higher, and maintenance cost is also higher, and the position is set the while agitating device and position, sand extraction tube road can overlap, for implementing to make troubles and further increased cost.3, the set-up mode of sand extraction tube and pressure air pipe causes stopping up easily, and agitator is also stuck easily, and setting pot is difficult to continuous operation, has also just reduced treatment effeciency, has increased maintenance cost simultaneously.When 4, overhauling, need in the body of pond, place a proof submersible sand discharging pump temporarily, behind sewage and the sand setting, can carry out upkeep operation in the emptying pond, very inconvenience.
Summary of the invention
At above-mentioned deficiency, technical problem to be solved by this invention is, how to provide a kind of sand setting effective, the treatment effeciency height, implement and maintenance cost low, it is good to move continuity, Maintenance and Repair are ramp type sediment by rotational flow system easily.
In order to solve the problems of the technologies described above, the present invention has adopted following technical proposals.
A kind of ramp type sediment by rotational flow system comprises the pond body, and pond body Lower Half is the sand hopper part with conical cavity, pond body the first half be diameter greater than the sand setting district of the cylindrical cavity of sand hopper part, body top in pond has inflow entrance and flow export; Also comprise the sand extraction tube road that vertically is arranged at body middle part, pond and carry the depressed structure of emery cloth, lower end, sand extraction tube road extends to the sand hopper bottom, upper end, sand extraction tube road is connected with grit water separator, the bottom surface that it is characterized in that described sand setting district part is provided with the sloping plate deposition structure, described sloping plate deposition structure comprises the circle swash plate that even compartment of terrain vertically arranges, described swash plate arranges (it is to tilt to have certain angle that described swash plate refers to respect to diametric(al)) along sand hopper upper port tangential direction, the top of described swash plate and the outside (outside refers to the side away from the sand hopper position) are tiltedly installed with wing plate, and described wing plate tilts along the right direction of inwall jet pipe water outlet; Described pond body also is provided with the inwall fluidic architecture, described inwall fluidic architecture comprises inwall jet pipeline, the delivery port direction of described inwall jet pipeline is to arrange along sand setting district inwall circumference tangential direction, and the water inlet end of described inwall jet pipeline links to each other with grey water system by intermediate water pipeline; Lower end, described sand extraction tube road is provided with the sand extraction tube entrance structure, described sand extraction tube entrance structure comprises the conical horn body that a diameter increases from top to bottom gradually, the horn body lower end is the open end, the horn body upper end is tightly connected with the sand extraction tube road, and end entrance extends downward the horn body medium position under the described sand extraction tube road; The described depressed structure of emery cloth of carrying comprises a pressure air pipeline that vertically arranges side by side with the sand extraction tube road, and pressure air lower end of duct mouth cross connection is to the horn body middle part, and pressure air lower end of duct mouth position is higher than entry position, lower end, sand extraction tube road.
When the present invention works, the sewage that contains silt particle enters into the pond body from inflow entrance, described inwall fluidic architecture is injected into middle water in the body of pond from sand setting district inwall circumference tangential direction, and then the formation eddy flow, current and swash plate bump increases sand grains precipitation probability simultaneously, wing plate on the swash plate is used for drainage, increase the flowability of eddy flow, make the whole eddy flow state that keeps of current in the body of pond, be convenient to sand fallout.Sand fallout is brought to the sand hopper bottom gradually behind sand hopper inside, under the effect of the air-flow that the pressure air pipeline feeds, proposed grit water separator with air-flow by the sand extraction tube road and separate, and the water behind the sand fallout flows out the pond body from flow export.
As optimization, bottom, described sand setting district is inboard downward-sloping setting.Being convenient to sand grains like this is pooled in the sand hopper.
As another optimization, described sand hopper bottom is provided with blowdown system, described blowdown system comprises exhausting pipeline, exhausting pipeline one end and sand hopper bottom connection, be provided with switch valve in the exhausting pipeline, be provided with the backwash pipeline between switch valve and the sand hopper bottom, the backwash pipeline is provided with switch valve and links to each other with intermediate water pipeline.Like this, when sand extraction tube road or pressure air pipeline need overhaul, can open blowdown system with the current in the body of pond and silt emptying, overhaul then, make inspection operation more convenient.In addition, when exhausting pipeline stops up, can adopt the recoil pipeline to carry out back flush, guarantee the operate as normal of blowdown system.
In the technique scheme, described grit water separator can adopt existing grit water separator, also can adopt the grit water separator after the optimization, grit water separator after the described structure optimization comprises that the vertical cross-section of a pointed end is leg-of-mutton housing, one side of enclosure interior is provided with the mechanism of shaking out, the mechanism's entrance that shakes out is positioned at housing bottom, also be provided with inlet channel and outlet conduit, the outlet conduit top is provided with the overflow launder structure and carries out water outlet, described overflow launder structure comprises first overflow launder and second overflow launder that interval arranged side by side arranges, described first overflow launder exceeds the water surface in the face of inlet channel one side, first overflow launder deviates from inlet channel one side upper surface for having zigzag spillwag chute, the both sides upper surface of described second overflow launder is has zigzag spillwag chute, and first overflow launder and second overflow launder join with outlet conduit separately; Also be provided with swash plate and stream structure, described swash plate streams structure and comprises first swash plate that arranges at interval side by side from top to bottom, second swash plate and the 3rd swash plate, first swash plate upper end is fixedly connected on first overflow launder below, the first swash plate lower end tilt along being directed downwards of second overflow launder and and housing between leave the gap, the upper end of described second swash plate and the 3rd swash plate is lower than the first swash plate upper end position successively, all leave the gap between the lower end of described second swash plate and the 3rd swash plate and the housing, the vertical projection of the 3rd swash plate upper end position is between inlet channel and first swash plate upper end.
Above-mentioned grit water separator structure optimization specifically has two places to improve, one place improves in existing overflow launder structure, on the basis of script first overflow launder, has set up second overflow launder, be increased to three spillwag chutes by a spillwag chute, so increased the overflow effect greatly.After increasing an overflow launder simultaneously, the current that are arranged in two overflow launder middle parts can overflow from two overflow launders respectively, make overflow more balanced, the overflow better effects if.An other place has set up swash plate to stream structure, this swash plate streams that structure is ingenious to be provided with three swash plates, the position of three swash plates makes current overflow from overflow launder from streaming at last from three swash plate surfaces successively after inlet channel enters housing, three swash plates one are the paths that has increased current, the 2nd, increased settling area, so increased the efficient of sand grains precipitation greatly.After sand grains under the precipitation reached housing bottom, the mechanism of being shaked out extracted out.The described mechanism of shaking out comprises a rectangular cylindrical shell for existing mechanism, and inner barrel is screw feed mechanism, and screw feed mechanism is rotated by driven by motor and then sand grains is retracted to hull outside from housing bottom.
The present invention has the following advantages and effect.
1, from former grey water system draws water pipe to setting pot, and be made as the inwall fluidic architecture, substitute former 2 agitators (4kw * 2), by discharge and effluxvelocity in the control, can form different swirl velocities, help the sand grains collision pool wall of different-grain diameter to be able to sedimentation.Simultaneously, by flow, the pressure of water and air in regulating, can realize pool inner water flow velocity degree, propose the accurate control of sand flow amount, put forward the sand effect to guarantee the best sand setting under the different water yields, the water quality situation.
2, the sand setting principle under tube settling theory and the eddy flow state is organically combined, in the sloping plate deposition structure of setting, the method that increases desilting area with swash plate promotes deposition efficiency, forms the ramp type sediment by rotational flow system of original creation.The swash plate of in the pond, setting up (having increased desilting area), the probability that has increased sand grains and swash plate front (upstream face) collision exactly and sunk, current also can form eddy region at the swash plate back side simultaneously, sand grains sinks to swash plate with the eddy current motion collision, thereby has strengthened the sedimentation of different-grain diameter sand grains.Improve sand fallout efficient greatly, improved sewage treating efficiency.Simultaneously, the present invention has obtained good effect after using in actual motion.Greatly improved the desanding efficiency of setting pot, the desanding amount has promoted 18.2 times before than technological transformation, and the SS clearance has improved 4 times before than technological transformation.Not only reduced the sediment deposition of subsequent technique section and to the wearing and tearing of equipment such as plug-flow agitator, reflux pump, sludge dewatering system, mud scraper; Improve volatile suspended matter concentration in the technology processing system simultaneously, promoted the treatment effeciency of system.
3, the blowdown system of Zeng Jiaing can thoroughly solve pond body bottom precipitation alluvial blocking problem, reduces pond body internal unit maintenance difficulty.
4, improved and carried the depressed structure of emery cloth, original sand extraction tube air-distribution hole (multiple spot distribution) transform as central gas supply, solved air-distribution hole plug problem.
5, the slope that is set to tilt bottom the sand setting district is convenient to precipitate sand grains and is imported sand hopper, has thoroughly solved former setting pot inner platform sand grains deposition serious problems.Wherein ramp slope preferably is adjusted into 12.5 ± 2.5 °.
6, improved the sand extraction tube entrance structure.The horn body of the taper of setting up can increase efficient and active area that sand grains sucks, has avoided the easy blocking problem of sand extraction tube entrance simultaneously, reaches and fully puies forward the sand effect, guarantees the operation of setting pot continous-stable.
7, make the plant maintenance maintenance load significantly reduce, personnel labor obviously reduces; Standby redundancy use amount and maintenance and repair expense have been saved simultaneously to greatest extent.
8, after the grit water separator structure optimization, improved sand moisture greatly from effect.
In sum, ramp type sediment by rotational flow of the present invention system, it is effective to have a sand setting, the treatment effeciency height, implement and maintenance cost low, the operation continuity is good, Maintenance and Repair such as make things convenient at advantage.
Description of drawings
Fig. 1 is the structural representation sketch when not showing grit water separator among the present invention.
Fig. 2 is that pond of the present invention body inner swash plate is from overlooking the location arrangements schematic diagram of direction.
Fig. 3 is the structural representation sketch of grit water separator among the present invention.
Fig. 4 is the vertical view of Fig. 3.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
In this specific embodiment, as shown in Figures 1 to 4, a kind of ramp type sediment by rotational flow system, comprise the pond body, pond body Lower Half is sand hopper 2 parts with conical cavity, pond body the first half be diameter greater than the sand setting district 3 of the cylindrical cavity of sand hopper 2 parts, pond body top has inflow entrance and flow export; Also comprise the sand extraction tube road 4 that vertically is arranged at body middle part, pond and carry the depressed structure of emery cloth, 4 lower ends, sand extraction tube road extend to sand hopper 2 bottoms, 4 upper ends, sand extraction tube road are connected with grit water separator, the bottom surface of described sand setting district 3 parts is provided with the sloping plate deposition structure, described sloping plate deposition structure comprises the circle swash plate 5 that even compartment of terrain vertically arranges, described swash plate arranges (it is to tilt to have certain angle that described swash plate refers to respect to diametric(al)) along sand hopper upper port tangential direction, the top of described swash plate and the outside (outside refers to the side away from the sand hopper position) are tiltedly installed with wing plate 6, and described wing plate 6 tilts along the right direction of inwall jet pipe water outlet; Described pond body also is provided with the inwall fluidic architecture, described inwall fluidic architecture comprises inwall jet pipeline 7, the delivery port direction of described inwall jet pipeline 7 is to arrange along sand setting district inwall circumference tangential direction, the water inlet end of described inwall jet pipeline 7 links to each other with grey water system by intermediate water pipeline 1, during concrete enforcement, intermediate water pipeline also is connected with the pipe blow-through that cleans for to bottom surface, sand setting district; 4 lower ends, described sand extraction tube road are provided with the sand extraction tube entrance structure, described sand extraction tube entrance structure comprises the conical horn body 8 that a diameter increases from top to bottom gradually, horn body 8 lower ends are the open end, horn body 8 upper ends and sand extraction tube road 4 are tightly connected, and the 4 times end entrances in described sand extraction tube road extend downward horn body 8 medium positions; The described depressed structure of emery cloth of carrying comprises a pressure air pipeline 9 that vertically arranges side by side with sand extraction tube road 4, pressure air pipeline 9 lower port cross connections are to horn body 8 middle parts, pressure air pipeline 9 lower port seats are higher than entry position, 4 lower end, sand extraction tube road (during enforcement, pressure air pipeline 9 belows can arrange a check valve, prevent the sand grains reverse flow, pressure air pipeline 9 upper ends are connected to source of the gas, and in this specific embodiment, adopting air blast machine room air-out house steward is source of the gas).
During enforcement, 3 bottoms, described sand setting district are inboard downward-sloping setting.Being convenient to sand grains like this is pooled in the sand hopper 2.Simultaneously, described sand hopper 2 bottoms are provided with blowdown system, described blowdown system comprises exhausting pipeline 10, exhausting pipeline 10 1 ends and sand hopper 2 bottom connections, be provided with switch valve 11 in the exhausting pipeline 10, be provided with backwash pipeline 12 between switch valve 11 and the sand hopper bottom, backwash pipeline 12 is provided with switch valve 13 and links to each other with intermediate water pipeline 1.Described grit water separator (referring to Fig. 3 and Fig. 4) comprises that the vertical cross-section of a pointed end is leg-of-mutton housing 14, one side of enclosure interior is provided with the mechanism 15 of shaking out, mechanism's 15 entrances that shake out are positioned at housing 14 bottoms, also be provided with inlet channel 16 and outlet conduit 17, outlet conduit 17 tops are provided with the overflow launder structure and carry out water outlet, described overflow launder structure comprises first overflow launder 18 and second overflow launder 19 that interval arranged side by side arranges, described first overflow launder 18 exceeds the water surface in the face of inlet channel 16 1 sides, first overflow launder 18 deviates from inlet channel one side upper surface for having zigzag spillwag chute, the both sides upper surface of described second overflow launder 19 is has zigzag spillwag chute, and first overflow launder 18 and second overflow launder 19 join with outlet conduit 17 separately; Also be provided with swash plate and stream structure, described swash plate streams structure and comprises first swash plate 21 that arranges at interval side by side from top to bottom, second swash plate 22 and the 3rd swash plate 23, first swash plate, 21 upper ends are fixedly connected on first overflow launder, 18 belows, first swash plate, 21 lower ends tilt along being directed downwards of second overflow launder 19 and and housing 14 between leave the gap, the upper end of described second swash plate 22 and the 3rd swash plate 23 is lower than first swash plate, 21 upper end positions successively, all leave the gap between the lower end of described second swash plate 22 and the 3rd swash plate 23 and the housing 14, the vertical projection of the 3rd swash plate 23 upper end positions is between inlet channel 16 and first swash plate, 21 upper ends.
What deserves to be explained is; inwall fluidic architecture among the application, sloping plate deposition structure, sand extraction tube entrance structure, carrying overflow launder structure in the depressed structure of emery cloth and the grit water separator and swash plate, to stream structure all are the research and development of applicant's autonomous Design; belong to the applicant makes creative contribution to prior art place; so structure with regard to these several places; the applicant also applies for having utility model protection separately; if others implements said structure separately, still can invade applicant's patent right.
Claims (3)
1. a ramp type sediment by rotational flow system comprises the pond body, and pond body Lower Half is the sand hopper part with conical cavity, and pond body the first half is diameter greater than the sand setting district of the cylindrical cavity of sand hopper part, and body top in pond has inflow entrance and flow export; Also comprise the sand extraction tube road that vertically is arranged at body middle part, pond and carry the depressed structure of emery cloth, lower end, sand extraction tube road extends to the sand hopper bottom, upper end, sand extraction tube road is connected with grit water separator, the bottom surface that it is characterized in that described sand setting district part is provided with the sloping plate deposition structure, described sloping plate deposition structure comprises the circle swash plate that even compartment of terrain vertically arranges, described swash plate arranges along sand hopper upper port tangential direction, top and the outside of described swash plate are tiltedly installed with wing plate, and described wing plate tilts along the right direction of inwall jet pipe water outlet; Described pond body also is provided with the inwall fluidic architecture, described inwall fluidic architecture comprises inwall jet pipeline, the delivery port direction of described inwall jet pipeline is to arrange along sand setting district inwall circumference tangential direction, and the water inlet end of described inwall jet pipeline links to each other with grey water system by intermediate water pipeline; Lower end, described sand extraction tube road is provided with the sand extraction tube entrance structure, described sand extraction tube entrance structure comprises the conical horn body that a diameter increases from top to bottom gradually, the horn body lower end is the open end, the horn body upper end is tightly connected with the sand extraction tube road, and end entrance extends downward the horn body medium position under the described sand extraction tube road; The described depressed structure of emery cloth of carrying comprises a pressure air pipeline that vertically arranges side by side with the sand extraction tube road, and pressure air lower end of duct mouth cross connection is to the horn body middle part, and pressure air lower end of duct mouth position is higher than entry position, lower end, sand extraction tube road; Described grit water separator comprises that the vertical cross-section of a pointed end is leg-of-mutton housing, one side of enclosure interior is provided with the mechanism of shaking out, the mechanism's entrance that shakes out is positioned at housing bottom, also be provided with inlet channel and outlet conduit, the outlet conduit top is provided with the overflow launder structure and carries out water outlet, described overflow launder structure comprises first overflow launder and second overflow launder that interval arranged side by side arranges, described first overflow launder exceeds the water surface in the face of inlet channel one side, first overflow launder deviates from inlet channel one side upper surface for having zigzag spillwag chute, the both sides upper surface of described second overflow launder is has zigzag spillwag chute, and first overflow launder and second overflow launder join with outlet conduit separately; The opposite side of enclosure interior also is provided with swash plate and streams structure, described swash plate streams structure and comprises first swash plate that arranges at interval side by side from top to bottom, second swash plate and the 3rd swash plate, first swash plate upper end is fixedly connected on first overflow launder below, the first swash plate lower end tilt along being directed downwards of second overflow launder and and housing between leave the gap, the upper end of described second swash plate and the 3rd swash plate is lower than the first swash plate upper end position successively, all leave the gap between the lower end of described second swash plate and the 3rd swash plate and the housing, the vertical projection of the 3rd swash plate upper end position is between inlet channel and first swash plate upper end.
2. ramp type sediment by rotational flow as claimed in claim 1 system is characterized in that, bottom, described sand setting district is inboard downward-sloping setting.
3. ramp type sediment by rotational flow as claimed in claim 1 system, it is characterized in that, described sand hopper bottom is provided with blowdown system, described blowdown system comprises exhausting pipeline, exhausting pipeline one end and sand hopper bottom connection, be provided with switch valve in the exhausting pipeline, be provided with the backwash pipeline between switch valve and the sand hopper bottom, the backwash pipeline is provided with switch valve and links to each other with intermediate water pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110285940 CN102430271B (en) | 2011-09-23 | 2011-09-23 | Inclined plate type rotational flow sand setting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110285940 CN102430271B (en) | 2011-09-23 | 2011-09-23 | Inclined plate type rotational flow sand setting system |
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| CN102430271A CN102430271A (en) | 2012-05-02 |
| CN102430271B true CN102430271B (en) | 2013-09-25 |
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| CN 201110285940 Expired - Fee Related CN102430271B (en) | 2011-09-23 | 2011-09-23 | Inclined plate type rotational flow sand setting system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105585163B (en) * | 2016-02-25 | 2018-03-09 | 江苏鑫华能环保工程股份有限公司 | Water, sand and oxide separator |
| CN107485897B (en) * | 2017-09-30 | 2023-08-15 | 绿源(北京)环保设备股份有限公司 | Sand lifting device and sand-water separation system |
| CN114711696A (en) * | 2021-01-05 | 2022-07-08 | 佛山市顺德区美的洗涤电器制造有限公司 | Spray arm assembly and dish washing machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB636744A (en) * | 1946-05-15 | 1950-05-03 | Alais & Froges & Camarque Cie | Apparatus for separating and forming suspensions of solids in liquids |
| GB1411879A (en) * | 1972-04-27 | 1975-10-29 | Ecodyne Corp | Water treating apparatus |
| CN2255302Y (en) * | 1996-03-15 | 1997-06-04 | 宜兴市成套环保设备厂 | Rotation-flow aeration sand-removing device |
| CN2568628Y (en) * | 2002-09-10 | 2003-08-27 | 扬州天雨环保机械制造有限公司 | Novel rotational flow sand setting device |
| CN2574756Y (en) * | 2002-10-25 | 2003-09-24 | 陈飞跃 | Air filtering filter element |
-
2011
- 2011-09-23 CN CN 201110285940 patent/CN102430271B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB636744A (en) * | 1946-05-15 | 1950-05-03 | Alais & Froges & Camarque Cie | Apparatus for separating and forming suspensions of solids in liquids |
| GB1411879A (en) * | 1972-04-27 | 1975-10-29 | Ecodyne Corp | Water treating apparatus |
| CN2255302Y (en) * | 1996-03-15 | 1997-06-04 | 宜兴市成套环保设备厂 | Rotation-flow aeration sand-removing device |
| CN2568628Y (en) * | 2002-09-10 | 2003-08-27 | 扬州天雨环保机械制造有限公司 | Novel rotational flow sand setting device |
| CN2574756Y (en) * | 2002-10-25 | 2003-09-24 | 陈飞跃 | Air filtering filter element |
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| CN102430271A (en) | 2012-05-02 |
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