CN210313841U - Quick clarification device for water treatment - Google Patents
Quick clarification device for water treatment Download PDFInfo
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- CN210313841U CN210313841U CN201921252156.3U CN201921252156U CN210313841U CN 210313841 U CN210313841 U CN 210313841U CN 201921252156 U CN201921252156 U CN 201921252156U CN 210313841 U CN210313841 U CN 210313841U
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Abstract
The utility model discloses a quick clarification device of water treatment belongs to the water treatment field, and its compact structure, clarification are efficient, have better clarification effect. The device comprises a reaction tank, a dynamic reaction part, a static reaction part and a clarification component; the reaction tank comprises a tank body and a lower end cover arranged below the tank body, and the tank body is respectively provided with a water inlet and a water outlet which are used for being connected with the aqueous solution to be treated. This application is through the improvement of structure, and will clarify, filter and close as an organic wholely, practice thrift an solitary filtration jar for holistic structure, cost, space area occupied obtain greatly reducing. Simultaneously, the structural design of first reacting chamber, second reacting chamber in this application through the cooperation with other parts for it has higher filtration efficiency. The air floatation clarifier has the advantages of being reasonable in design, ingenious in structure, convenient to use, capable of greatly improving clarification efficiency in unit time, shortening air floatation time, and high in application value and good in application prospect.
Description
Technical Field
The utility model relates to a water treatment field specifically is a quick clarification device of water treatment. The method and the device can realize quick clarification, shorten air floatation time, improve clarification efficiency in unit time, and have high application value and good application prospect.
Background
Clarification has been widely used as a common technical operation in the field of water treatment. When the water containing impurities is clarified, a coagulant is added into the water to promote the impurities in the water to form floccules, and the floccules are further flocculated and gathered along with the impurities in the water and sink as the floccules become larger, so that the water is clarified. In the prior art, water to be treated containing a flocculating agent is usually placed in a clarification tank, and water and impurities are precipitated and separated under the action of gravity, so that the purpose of clarification is achieved. The clarification treatment mode needs simple equipment structure, but has longer clarification time and needs to improve the treatment efficiency. For this reason, corresponding studies have been conducted.
Chinese patent application CN91231766.3 discloses a water clarifier, which has a water inlet, a first reaction chamber, a second reaction chamber and a separation chamber, wherein the water inlet is communicated with the first reaction chamber, the first reaction chamber is communicated with the second reaction chamber, the second reaction chamber is communicated with the separation chamber, the lower part of the separation chamber is provided with a sludge outlet, the upper part is provided with a purified water outlet, and the water clarifier is characterized in that the middle part of the separation chamber 9 is provided with a brush type packing layer. This scheme sets up brush type packing layer at the middle part of separator, and this packing layer has the absorption, holds back the tiny particle effect, and the flocculating constituent after coagulating is adsorbed by this packing layer, holds back the back, just forms a stable mud sediment suspension layer, and follow-up tiny flocculating constituent constantly rises when to the packing layer, produces the contact flocculation with the granule that has adsorbed at the packing layer, drops after the flocculating constituent grow and sinks, can avoid the tiny particle to converge into the water purification on upper portion.
Chinese patent application CN201410035879.3 discloses a balanced water distribution clarification tank, which comprises a backflow tank and a clean water tank, wherein one side of the backflow tank is provided with a water inlet, the other side is communicated with the clean water tank through a water outlet, the balanced water distribution clarification tank also comprises a sedimentation tank, the sedimentation tank is communicated with the clean water tank through a filtering device, the bottom of the backflow tank is provided with a sewage pump, and the sewage pump is communicated with the sedimentation tank. Adopt the backward flow pond to adsorb the water and deposit the postfilter and send into the clean water basin, cooperate the backward flow pond to deposit silt and send into the clean water basin after filtering in the sedimentation tank, realize that the outside effectively deposits, the filtration of sending water, satisfy follow-up flocculation reaction requirement, be favorable to water treatment efficiency, quality improvement, water economy resource.
The Chinese patent application CN201610300068.0 discloses a tangential water inlet type clarification tank, wherein the whole clarification tank is in a conical structure, four grid baffles are arranged inside the cone, and an annular sludge suction pipeline and a sludge suction port are arranged at the bottom of the tank and are connected with an external sludge discharge and backwash pipe; the upper part of the tank body is provided with a water outlet siphon and a water outlet channel, the upper part of the tank body is provided with a water inlet pipe and a chemical feeding pipe, and the chemical feeding pipe is connected with the water inlet pipe and then enters the tank body; the lower part is also provided with a sludge discharge and backwash pipe and a blow-down pipe, and the four pipelines are respectively provided with a gate valve. The clarification tank utilizes hydraulics, and greatly improves the coagulation effect and efficiency according to the characteristics of centrifugal force.
Chinese patent application cn2017103967. x discloses a high-efficient hydrodynamic force clarification clarifier, it includes the barrel, the bagger bottom is worn to establish and is installed the injection pipe, barrel top central authorities are equipped with the second flocculation chamber, the second flocculation chamber intracavity is equipped with first net flocculation chamber, first net flocculation chamber intercommunication has the choke, the under shed of choke is provided with the expansion opening, the upper shed of injection pipe is located the expansion opening, the reflecting plate is installed to the choke outer wall, install the net in the first net flocculation chamber, from down and upward setting gradually clarification device between second flocculation chamber outer wall and the barrel inner wall, filter equipment and weir go out. In the clarifying purifier, the first grid flocculation chamber enables the reaction of the medicament and water to be sufficient, the water impact force is relieved, and the optimal flocculation alum blossom is formed; meanwhile, three-level clarification sedimentation is formed by natural flocculation clarification sedimentation, inclined tube clarification sedimentation and filtration clarification sedimentation.
As mentioned above, some new clarifier configurations have emerged in the prior art. The inventor of the application provides a water treatment rapid clarification device which is compact in structure and high in clarification efficiency.
SUMMERY OF THE UTILITY MODEL
The invention aims to provide a rapid clarification device for water treatment, which has compact structure, high clarification efficiency and better clarification effect. The air floatation clarifier has the advantages of being reasonable in design, ingenious in structure, convenient to use, capable of greatly improving clarification efficiency in unit time, capable of shortening air floatation time and high in application value.
The utility model adopts the technical scheme as follows:
the water treatment rapid clarification device comprises a reaction tank, a dynamic reaction part, a static reaction part and a clarification component;
the reaction tank comprises a tank body and a lower end cover arranged below the tank body, and the tank body is respectively provided with a water inlet and a water outlet which are used for being connected with the aqueous solution to be treated;
the dynamic reaction part comprises a connecting pipe and a first reaction chamber, the first reaction chamber is in an inverted cone shape, the opening area of the upper end of the first reaction chamber is larger than that of the lower end of the first reaction chamber, the central axis of the connecting pipe is obliquely arranged relative to the horizontal plane, the water inlet is communicated with the opening of the lower end of the first reaction chamber through the connecting pipe, and aqueous solution can enter the first reaction chamber from the water inlet and the connecting pipe;
the static reaction piece comprises a shielding piece and a second reaction chamber, the second reaction chamber is a conical body, the opening area of the upper end of the second reaction chamber is smaller than that of the lower end of the second reaction chamber, the lower end of the shielding piece is connected with the opening of the upper end of the second reaction chamber into a whole, and a gap is formed between the opening of the lower end of the second reaction chamber and the inner wall of the tank body;
the shielding piece is positioned outside the first reaction chamber, the horizontal plane where the upper end of the shielding piece is positioned above the horizontal plane where the upper end opening of the first reaction chamber is positioned, a second liquid conveying channel is formed between the shielding piece and the first reaction chamber, and the water solution overflowing from the first reaction chamber can enter the second liquid conveying channel under the action of the shielding plate;
a third liquid conveying channel is formed between the outer wall of the static reaction part and the inner wall of the tank body, the aqueous solution in the second reaction chamber can enter the third liquid conveying channel through a gap between the opening at the lower end of the second reaction chamber and the inner wall of the tank body, a static reaction area is formed between the lower end of the second reaction chamber and the upper surface of the lower end cover, and the precipitate in the aqueous solution in the second reaction chamber can be deposited in the static reaction area;
the clarifying component comprises a clarifying chamber, a secondary filtering medium and a filtering plate, wherein the horizontal plane of the upper opening of the clarifying chamber is positioned below the horizontal plane of the upper end of the shielding piece, and sewage flowing in from the third liquid conveying channel can enter the clarifying chamber; the secondary filter medium and the filter plate are sequentially arranged in the clarifying chamber, a water outlet space is formed between the lower side surface of the filter plate and the clarifying chamber, the water outlet space is connected with the water outlet, and the aqueous solution can be treated by the secondary filter medium and the filter plate in sequence and then flows out through the water outlet space and the water outlet;
the dynamic reaction part, the static reaction part and the clarification chamber are respectively connected with the tank body, and the tank body can respectively provide support for the dynamic reaction part, the static reaction part and the clarification chamber.
The section of the first reaction chamber perpendicular to the central axis of the first reaction chamber is rectangular, circular or elliptical; the second reaction chamber is rectangular, circular or elliptical in cross section perpendicular to its central axis.
The tank body is tubular with two open ends.
The central axis of the connecting pipe and the central axis of the first reaction chamber form an included angle of 20-80 degrees.
The central axis of the first reaction chamber is positioned in the vertical direction.
The clarifying chamber is arranged on the inner wall of the reaction tank.
The clarifying chamber is a ring shape with an opening at the upper end.
The first reaction chamber is connected with a shielding piece through a reinforcing rib, and the shielding piece is connected with the tank body through the reinforcing rib.
And a drain pipe is arranged on the lower end cover, and a drain valve is arranged on the drain pipe.
The secondary filter medium comprises a bamboo fiber filter layer and an active carbon adsorption layer.
In view of the foregoing, the present application provides a rapid clarification device for water treatment. On the premise of ensuring the rapid clarification of the aqueous solution, the structure of the device is completely new designed, and a clarification tank can be effectively saved by adopting a clarification and filtration integrated structure; by improving the reaction efficiency, the rapid clarification of the aqueous solution can be realized. In this structure, aqueous solution gets into first reaction chamber earlier in the connecting tube and carries out primary reaction, gets into the second reaction chamber again and carries out secondary reaction to utilize the effect of gravity to clarify, make the particulate matter deposit on the lower end cover of retort, aqueous solution on it then carries out clarification processing through third liquid transfer passage entering clarification subassembly in, finally obtains the aqueous solution after the clarification.
The application discloses clarification device can be used for quick clarification, the filtration of carwash sewage, river, comprehensive waste water, and has simple structure, clarification, the quick advantage of filtration. This application is through the improvement of structure, and will clarify, filter and close as an organic wholely, practice thrift an solitary filtration jar for holistic structure, cost, space area occupied obtain greatly reducing. Simultaneously, the structural design of first reacting chamber, second reacting chamber in this application through the cooperation with other parts for it has higher filtration efficiency. The air floatation clarifier has the advantages of being reasonable in design, ingenious in structure, convenient to use, capable of greatly improving clarification efficiency in unit time, shortening air floatation time, and high in application value and good in application prospect.
Drawings
FIG. 1 is a top view of a rapid clarification device for water treatment in example 1.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a variant of fig. 2.
The labels in the figure are: 1. jar body, 2, bottom end cover, 3, connecting pipe, 4, first reaction chamber, 5, shielding piece, 6, second reaction chamber, 7, clarification chamber, 8, fiber filter layer, 9, active carbon adsorption layer, 10, filter.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in the figure, the water treatment rapid clarification device of the embodiment comprises a reaction tank, a dynamic reaction part, a static reaction part and a clarification component. The reaction tank comprises a tank body and a lower end cover arranged below the tank body, and the tank body is respectively provided with a water inlet and a water outlet which are used for being connected with the aqueous solution to be treated. In this embodiment, the lower end cap is a hemisphere.
In this embodiment, the dynamic reaction spare includes connecting pipe, first reaction chamber, and first reaction chamber is the back taper body, and the central axis of connecting pipe sets up with horizontal plane slope relatively, and the water inlet passes through the lower extreme opening intercommunication of connecting pipe and first reaction chamber. In this structure, the upper end open area of first reaction chamber is greater than the lower extreme open area of first reaction chamber, and the aqueous solution can get into in the first reaction chamber from water inlet, connecting pipe.
Meanwhile, the static reaction piece comprises a shielding piece and a second reaction chamber, the second reaction chamber is a conical body, the upper end opening area of the second reaction chamber is smaller than the lower end opening area of the second reaction chamber, the lower end of the shielding piece is connected with the upper end opening of the second reaction chamber into a whole, and a gap is formed between the lower end opening of the second reaction chamber and the inner wall of the tank body (in the embodiment, a channel with the width of 5 cm is formed between the lower end opening of the second reaction chamber and the inner wall of the tank body). The shielding piece is positioned outside the first reaction chamber, the horizontal plane where the upper end of the shielding piece is positioned above the horizontal plane where the upper end opening of the first reaction chamber is positioned, and a second liquid conveying channel is formed between the shielding piece and the first reaction chamber. In the structure, under the action of the baffle plate, the water solution overflowing from the first reaction chamber can enter the second liquid conveying channel. A static reaction zone is formed between the lower end of the second reaction chamber and the upper surface of the lower end cover, and precipitates in the aqueous solution in the second reaction chamber can be deposited in the static reaction zone.
In this embodiment, a third liquid conveying passage is formed between the outer wall of the static reaction member and the inner wall of the tank body, and the aqueous solution in the second reaction chamber can enter the third liquid conveying passage through a gap between the lower end opening of the second reaction chamber and the inner wall of the tank body; namely, a gap is arranged between the lower end opening of the second reaction chamber and the inner wall of the tank body, so that the static reaction area is communicated with the third liquid conveying channel, and water flow can enter the third liquid conveying channel through the gap.
In this embodiment, the clarification subassembly includes clarification chamber, secondary filter medium, filter, and the horizontal plane that the upper opening of clarification chamber is located the below of the horizontal plane of upper end place of shielding member, and secondary filter medium, filter set gradually in clarification chamber, form the play water space between filter downside and the clarification chamber, go out the water space and link to each other with the delivery port. In this structure, because the horizontal plane of the top opening place of clarification chamber is located the below of the upper end place horizontal plane of shielding piece for aqueous solution in the third liquid transfer passage can get into in the clarification chamber. In the clarifying chamber, the aqueous solution can flow out through the water outlet space and the water outlet after being sequentially treated by the secondary filter medium and the filter plate.
In this embodiment, the dynamic reaction member, the static reaction member, and the clarification chamber are connected to the tank body, and the tank body can support the dynamic reaction member, the static reaction member, and the clarification chamber.
In this embodiment, the first reaction chamber and the second reaction chamber are respectively rectangular, circular or elliptical in cross section perpendicular to the central axis thereof, and the tank body is tubular with openings at both ends. Preferably, the clarification chamber is arranged on the inner wall of the reaction tank, the upper end of the clarification chamber is in an open-ended circular ring shape, and the included angle formed by the central axis of the connecting pipe and the central axis of the first reaction chamber is 20-80 degrees.
Further, first reaction chamber passes through the strengthening rib and links to each other with the shielding piece, and the shielding piece passes through the strengthening rib and links to each other with the jar body. In this embodiment, four reinforcing ribs are provided, which can effectively connect the respective components into one body. In addition, the reinforcing rib between the shielding piece and the tank body can overflow water and turn out water splash, so that the oxygen content of the aqueous solution can be further increased. Meanwhile, the secondary filter medium comprises a bamboo fiber filter layer and an active carbon adsorption layer; in the structure, the water solution is sequentially filtered by the bamboo fiber filter layer and adsorbed by the activated carbon adsorption layer, so that the water solution is clarified. In this embodiment, the lower end cover is provided with a drain pipe, and the drain pipe is provided with a drain valve. After large particles in the reaction tank are deposited to a certain degree, the large particles can be discharged through a blow-off pipe.
The quick clarification device of water treatment of this embodiment can be used for car wash sewage, river, the quick clarification of comprehensive waste water, filtration. Taking the fast clarifying device of this embodiment as an example for treating sewage containing flocculant, the working process is described as follows:
(1) under the action of a water pump, the water solution containing the flocculating agent enters the first reaction chamber through the connecting pipe, and the central axis of the connecting pipe is obliquely arranged relative to the horizontal plane, so that the flow direction of the water solution entering the first reaction chamber is changed, and the water solution is prevented from being directly flushed out of the first reaction chamber;
(2) meanwhile, as the opening area of the upper end of the first reaction chamber is larger than the opening area of the lower end of the first reaction chamber, a dynamic reaction area is formed inside the first reaction chamber, impurities in the aqueous solution and the flocculating agent can be repeatedly mixed, which is beneficial to the rapid formation of large particles of the impurities (in the embodiment, the first reaction chamber is in an inverted cone shape, and the aqueous solution is repeatedly mixed in the first reaction chamber, so that the flocculating agent and the impurities in the aqueous solution are mixed, and the particles are continuously grown);
(3) when large particles are formed, the water and the large particles move from bottom to top under the drive of the aqueous solution, enter a second liquid conveying channel and then enter the lower part of a second reaction chamber from top to bottom;
(4) meanwhile, a static reaction area is formed between the lower end of the second reaction chamber and the upper surface of the lower end cover, water and large particles are fully reacted and mixed in the static reaction area, the large particles are deposited on the surface of the lower end cover under the action of gravity, and water flows into the third liquid conveying channel from bottom to top;
(5) the water solution flows from bottom to top in the third conveying channel and is shielded by the shielding piece, the water solution enters the clarifying chamber for treatment, the secondary filtering medium is used for filtering, and the filtering plate is used for solid-liquid separation, so that the clarified water solution is obtained.
In conclusion, the present example uses one reaction tank to achieve the precipitation and separation of impurities in the aqueous solution. The improvement of structure is passed through to this embodiment, and is combined as an organic whole with clarification, filtration, practices thrift an solitary filtration jar for holistic structure, cost, space area occupied obtain greatly reducing. Simultaneously, the structural design of first reaction chamber, second reaction chamber in this application for the medicament incessantly overturns in the inside, and the medicament can mix with the aqueous solution fine, and the large granule that forms can deposit on the lower extreme cover, and the aqueous solution after the clarification then can be discharged through the delivery port.
Example 2
In this embodiment, the lower end cap has an inverted cone structure, and the rest is the same as in embodiment 1.
This example illustrates clear river water as an example:
(1) river water containing sand, silt and the like enters the first reaction chamber through the connecting pipe under the action of the water pump, and the central axis of the connecting pipe is obliquely arranged relative to the horizontal plane, so that the flow direction of the aqueous solution entering the first reaction chamber is changed, and the aqueous solution is prevented from being directly flushed out of the first reaction chamber;
(2) meanwhile, the opening area of the upper end of the first reaction chamber is larger than that of the lower end of the first reaction chamber, so that a dynamic reaction region is formed inside the first reaction chamber, and impurities in river water are separated under the impact of water flow;
(3) under the drive of the aqueous solution, the river water containing impurities moves from bottom to top, enters the second liquid conveying channel and then enters the lower part of the second reaction chamber from top to bottom;
(4) meanwhile, a static reaction area is formed between the lower end of the second reaction chamber and the upper surface of the lower end cover, river water containing impurities is deposited in the static reaction area, and water flow containing less impurities enters the third liquid conveying channel from bottom to top;
(5) the water solution flows from bottom to top in the third conveying channel and is shielded by the shielding piece, the water solution enters the clarifying chamber for treatment, the secondary filtering medium is used for filtering, and the filtering plate is used for solid-liquid separation, so that the clarified water solution is obtained.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (11)
1. The rapid water treatment clarification device is characterized by comprising a reaction tank, a dynamic reaction part, a static reaction part and a clarification component;
the reaction tank comprises a tank body and a lower end cover arranged below the tank body, and the tank body is respectively provided with a water inlet and a water outlet which are used for being connected with the aqueous solution to be treated;
the dynamic reaction part comprises a connecting pipe and a first reaction chamber, the first reaction chamber is in an inverted cone shape, the opening area of the upper end of the first reaction chamber is larger than that of the lower end of the first reaction chamber, the central axis of the connecting pipe is obliquely arranged relative to the horizontal plane, the water inlet is communicated with the opening of the lower end of the first reaction chamber through the connecting pipe, and aqueous solution can enter the first reaction chamber from the water inlet and the connecting pipe;
the static reaction piece comprises a shielding piece and a second reaction chamber, the second reaction chamber is a conical body, the opening area of the upper end of the second reaction chamber is smaller than that of the lower end of the second reaction chamber, the lower end of the shielding piece is connected with the opening of the upper end of the second reaction chamber into a whole, and a gap is formed between the opening of the lower end of the second reaction chamber and the inner wall of the tank body;
the shielding piece is positioned outside the first reaction chamber, the horizontal plane where the upper end of the shielding piece is positioned above the horizontal plane where the upper end opening of the first reaction chamber is positioned, a second liquid conveying channel is formed between the shielding piece and the first reaction chamber, and the water solution overflowing from the first reaction chamber can enter the second liquid conveying channel under the action of the shielding plate;
a third liquid conveying channel is formed between the outer wall of the static reaction part and the inner wall of the tank body, the aqueous solution in the second reaction chamber can enter the third liquid conveying channel through a gap between the opening at the lower end of the second reaction chamber and the inner wall of the tank body, a static reaction area is formed between the lower end of the second reaction chamber and the upper surface of the lower end cover, and the precipitate in the aqueous solution in the second reaction chamber can be deposited in the static reaction area;
the clarifying component comprises a clarifying chamber, a secondary filtering medium and a filtering plate, wherein the horizontal plane of the upper opening of the clarifying chamber is positioned below the horizontal plane of the upper end of the shielding piece, and sewage flowing in from the third liquid conveying channel can enter the clarifying chamber; the secondary filter medium and the filter plate are sequentially arranged in the clarifying chamber, a water outlet space is formed between the lower side surface of the filter plate and the clarifying chamber, the water outlet space is connected with the water outlet, and the aqueous solution can be treated by the secondary filter medium and the filter plate in sequence and then flows out through the water outlet space and the water outlet;
the dynamic reaction part, the static reaction part and the clarification chamber are respectively connected with the tank body, and the tank body can respectively provide support for the dynamic reaction part, the static reaction part and the clarification chamber.
2. The water treatment rapid clarification device according to claim 1, wherein the cross section of the first reaction chamber perpendicular to the central axis thereof is rectangular, circular or elliptical; the second reaction chamber is rectangular, circular or elliptical in cross section perpendicular to its central axis.
3. The water treatment rapid clarification device according to claim 1 or 2, wherein the tank body is tubular with two open ends.
4. The rapid water treatment clarification device according to claim 1, wherein the included angle formed by the central axis of the connecting pipe and the central axis of the first reaction chamber is 20-80 °.
5. The water treatment rapid clarification device according to claim 4, wherein the central axis of the first reaction chamber is located in the vertical direction.
6. The water treatment rapid clarification device according to claim 1, wherein the clarification chamber is arranged on the inner wall of the reaction tank.
7. The rapid water treatment clarification device according to claim 6, wherein the clarification chamber is a circular ring with an open upper end.
8. The water treatment rapid clarification device according to claim 1, wherein the first reaction chamber is connected with a shielding piece through a reinforcing rib, and the shielding piece is connected with the tank body through a reinforcing rib.
9. The rapid water treatment clarification device according to claim 1, wherein a drain pipe is arranged on the lower end cover, and a drain valve is arranged on the drain pipe.
10. The water treatment rapid clarification device according to any one of claims 1, 2 and 4-9, wherein the secondary filter medium comprises a bamboo fiber filter layer and an activated carbon adsorption layer.
11. The water treatment rapid clarification device according to claim 3, wherein the secondary filter medium comprises a bamboo fiber filter layer and an activated carbon adsorption layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921252156.3U CN210313841U (en) | 2019-08-05 | 2019-08-05 | Quick clarification device for water treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921252156.3U CN210313841U (en) | 2019-08-05 | 2019-08-05 | Quick clarification device for water treatment |
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| Publication Number | Publication Date |
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| CN210313841U true CN210313841U (en) | 2020-04-14 |
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| CN201921252156.3U Active CN210313841U (en) | 2019-08-05 | 2019-08-05 | Quick clarification device for water treatment |
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