CN213326862U - Electric flocculation device - Google Patents

Abstract

The utility model provides an electric flocculation device, this electric flocculation device includes: the shell is provided with a flocculation cavity, a liquid inlet and a liquid outlet which are respectively communicated with the flocculation cavity; the electrode plates are arranged in the flocculation cavity side by side at intervals, and the extending direction of each electrode plate is the same as the flowing direction of the fluid; and the particle electrode is positioned in the flocculation cavity. Through the technical scheme provided by the application, the problem of serious electrode passivation in the prior art can be solved.

Description

Electric flocculation device

Technical Field

The utility model relates to an electrochemistry technical field particularly, relates to an electric flocculation device.

Background

At present, the electric flocculation is an electrochemical method mainly aiming at the purification treatment of wastewater. The cathode and anode in the electric flocculation device generate oxidation-reduction reaction under the action of an external direct current electric field, so that organic matters or inorganic matters in the wastewater can be subjected to oxidation-reduction reaction, and then are coagulated and floated to separate pollutants from the water body. By the device, various harmful pollutants such as heavy metal, suspended matters, oil, phosphate and the like in the wastewater can be effectively removed.

A plurality of groups of parallel polar plates are fixedly arranged in the existing electric flocculation device, and an electric field is generated between the polar plates after the polar plates are connected with direct current, so that water to be treated flows into gaps of the polar plates. The electrified polar plate can generate electrochemical reaction to dissolve Al³⁺Or Fe²⁺Plasma and hydrolysis in water to generate flocculation reaction.

In the working process of the existing electric flocculation device, the external electric field can also make anions and cations directionally move in the electric field, so that cations such as calcium, magnesium and the like are enriched near the cathode and combined with high-concentration hydroxide ions generated by the cathode to generate hydroxide precipitates which are firmly adhered to the surface of the electrode, thereby passivating the electrode. The passivated electrode surface still continues to deposit the hydroxides and continuously accumulates, so that the scale on the electrode surface becomes thicker and thicker. The generated scale has poor conductivity, plays an insulating role on the surface of the electrode, reduces the current intensity of the electrode, increases the voltage and prevents the electrode plate from discharging normally and uniformly. The current intensity on the surface of the electrode which is locally deprived of passivation scale is greatly increased, so that local excessive corrosion is caused, the integral structure of the polar plate is damaged, and the polar plate is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electric flocculation device to solve the serious problem of electrode passivation among the prior art.

The utility model provides an electric flocculation device, electric flocculation device includes: the shell is provided with a flocculation cavity, a liquid inlet and a liquid outlet which are respectively communicated with the flocculation cavity; the electrode plates are arranged in the flocculation cavity side by side at intervals, and the extending direction of each electrode plate is the same as the flowing direction of the fluid; and the particle electrode is positioned in the flocculation cavity.

Further, the flocculation chamber has a first inlet and a first outlet arranged oppositely, and the first inlet is positioned below the first outlet.

Further, the flow area of the flocculation cavity is gradually increased from the first inlet to the first outlet.

Further, the shell is provided with a fluid channel, the fluid channel is provided with a second inlet and a second outlet which are oppositely arranged, the fluid channel and the flocculation cavity are arranged side by side, the second outlet is communicated with the first inlet, the first outlet is communicated with the second inlet, the liquid inlet and the liquid outlet are both positioned above the fluid channel and the flocculation cavity, the liquid inlet is communicated with the second inlet, and the liquid outlet is communicated with the first outlet.

Further, the electric flocculation device also comprises: and the insulating particles are positioned in the flocculation cavity.

Further, the electric flocculation apparatus further comprises a driving device for driving the fluid to flow, the driving device comprising: a motor having an output shaft; the speed reducer is arranged on an output shaft of the motor; the propeller is connected with the speed reducer, the propeller is arranged in the fluid channel, and the motor drives the propeller to rotate through the speed reducer.

Further, fluid passage is including the vertical section and the crooked section that communicate in order, and the one end of keeping away from the crooked section of vertical section forms the second import, and the one end of keeping away from the vertical section of crooked section forms the second export, and the lowest of crooked section is provided with sewage pipes, is provided with the blowoff valve on the sewage pipes.

Further, the electric flocculation device also comprises: the supporting plate is arranged in the flocculation cavity and is positioned at the first inlet, and the supporting plate is provided with a plurality of flow holes for fluid to pass through; the water distributor is arranged on the bearing plate.

Further, the electric flocculation device also comprises: and the sensor is arranged in the flocculation cavity and is used for detecting the position of the particle electrode in the flocculation cavity.

Further, the electric flocculation device also comprises: a first overflow weir plate disposed at the first outlet; and the second overflow weir plate is arranged at the liquid outlet, and the arrangement position of the second overflow weir plate is higher than that of the first overflow weir plate.

Use the technical scheme of the utility model, this electric flocculation device includes casing, a plurality of plate electrode and granule electrode. The particle electrode is positioned in the flocculation cavity. When the device works, water flows in the flocculation cavity, and the particle electrodes are driven by the water flow to move to be in a fluidized state. The fluidized particle electrodes are in a scattered state, and the distance between the particle electrodes is increased, so that the particle electrodes cannot be continuously contacted with each other. After the electrode plates are electrified, because the liquid filled in the flocculation cavity has certain conductivity, a uniform electric field gradient is formed in the flocculation cavity. The particle electrode in the flocculation chamber is now a good conductor, resulting in an equal potential across the particle surface. Because of the electric field gradient formed by incomplete conduction of the liquid, the surface of the particle electrode has electric potential relative to the liquid, the electric potential of the particle electrode makes the surface of the electrode generate redox reaction, the electrode is corroded, organic matters in water are oxidized, and the corroded metal cations are hydrolyzed in the water to form hydroxide colloid, so that the gel breaking and flocculation effects are achieved. The particle electrode continuously changes direction and position under the action of water flow, the surface of the particle electrode is not easy to form an ion convergence phenomenon in a fixed state, the polarization phenomenon on the surface of the particle electrode is eliminated, hydroxide scale is not easy to form on the surface of the particle electrode, the passivation phenomenon of the particle electrode can be eliminated, and the normal work of the particle electrode is ensured. Moreover, the fluidized particle electrode has a friction effect on the surface of the fixed electrode plate, and the passivation of the electrode plate can be eliminated in time.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of an electric flocculation apparatus provided according to an embodiment of the present invention;

figure 2 shows a left side view of the electroflocculation apparatus of figure 1.

Wherein the figures include the following reference numerals:

11. a flocculation chamber; 12. a liquid inlet; 13. a liquid outlet; 14. a vertical section; 15. a curved section;

20. an electrode plate; 21. a binding post;

31. a motor; 32. a speed reducer; 33. a propeller; 34. a bearing;

40. a blowoff valve; 50. a support plate; 60. a water distributor; 70. a sensor;

81. a first overflow weir plate; 82. a second overflow weir plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 and 2, the present application provides an electric flocculation apparatus, including: a housing, an electrode plate 20, and a particle electrode. Wherein, the casing has flocculation chamber 11, is provided with inlet 12 and liquid outlet 13 on the casing, and inlet 12 and liquid outlet 13 communicate with flocculation chamber 11 respectively. A plurality of electrode plates 20 are arranged in the electric flocculation device, the electrode plates 20 are arranged in the flocculation cavity 11 side by side at intervals, and the extending direction of each electrode plate 20 is the same as the flowing direction of the fluid. The particle electrode is located within the flocculation chamber 11.

The electric flocculation apparatus provided by the present embodiment includes a housing, a plurality of electrode plates 20, and a particle electrode. The particle electrode is located within the flocculation chamber 11. When the device works, water flows in the flocculation cavity 11, and the water flow drives the particle electrodes to move so that the particle electrodes become a fluidized state. The fluidized particle electrodes are in a scattered state, and the distance between the particle electrodes is increased, so that the particle electrodes cannot be continuously contacted with each other. After the electrode plate 20 is electrified, because the liquid filling the flocculation chamber 11 has certain conductivity, a uniform electric field gradient is formed in the flocculation chamber 11. The particle electrode in the flocculation chamber 11 is now a good conductor, resulting in an equal potential everywhere on the particle surface. Because of the electric field gradient formed by incomplete conduction of the liquid, the surface of the particle electrode has electric potential relative to the liquid, the electric potential of the particle electrode makes the surface of the electrode generate redox reaction, the electrode is corroded, organic matters in water are oxidized, and the corroded metal cations are hydrolyzed in the water to form hydroxide colloid, so that the gel breaking and flocculation effects are achieved. The particle electrode continuously changes direction and position under the action of water flow, the surface of the particle electrode is not easy to form an ion convergence phenomenon in a fixed state, the polarization phenomenon on the surface of the particle electrode is eliminated, hydroxide scale is not easy to form on the surface of the particle electrode, the passivation phenomenon of the particle electrode can be eliminated, and the normal work of the particle electrode is ensured. The particle electrodes are always in a fluidized state, so that the working efficiency of the particle electrodes can be improved, and the particle electrodes can mutually collide and rub in the fluidized state, and can also perform self-cleaning and cleaning effects on the electrode plate 20.

Wherein the flocculation chamber 11 has a first inlet and a first outlet arranged oppositely, and the first inlet is positioned below the first outlet. In this embodiment, the flocculation chamber 11 is vertically disposed within the housing.

The flow area of the flocculation chamber 11 can be constant or variable. The cross-sectional shape of the flocculation cavity 11 in the vertical direction can be rectangular or trapezoidal, and the flocculation cavity 11 can be of a polygonal columnar structure or a cylindrical structure. In the present application, the flow area of the flocculation chamber 11 is gradually increased from the first inlet to the first outlet. Can be convenient for like this the particle electrode pile up in the bottom of flocculation chamber 11 to, at the fluid flow in-process, 11 bottom circulation cross sections in flocculation chamber are little, the top circulation cross section is big, makes the fluid fast at the bottom velocity of flow like this, and the top velocity of flow is slow, and then big to the impact of particle electrode in the bottom, and little to the impact of particle electrode at the top, make the particle electrode float from top to bottom in flocculation chamber 11.

Wherein, the flocculation cavity 11 can be added with insulating particles or not. In this embodiment, the electroflocculation apparatus includes insulating particles, which are also located within the flocculation chamber 11. Through setting up insulating granule, can avoid the granule electrode to distribute too densely in flocculation chamber 11, reduce and contact each other between the granule electrode, avoid the granule electrode to pile up each other at the during operation, the intercommunication causes the short circuit phenomenon.

Specifically, two sides of the flocculation cavity 11 are respectively provided with an electrode plate 20, and the connection wires of the electrode plates 20 can be connected in series or in parallel, and are rotated out of the flocculation cavity 11 through a binding post 21 and connected with the positive electrode and the negative electrode of the output end of the direct-current power supply. The electrode plate 20 may be made of a conductive material such as an iron plate, an aluminum plate, a stainless steel plate, a titanium plate, or a coated plate. Can be in various forms such as plates, perforated plates, net materials and the like. The electrode plate 20 may be set to have a trapezoidal structure or a rectangular structure with a large top and a small bottom, depending on the shape of the vertical cross section of the flocculation chamber 11. The electrode plate 20 has a terminal connected to the terminal post 21, and the terminal can be connected underwater or above water. The flocculation cavity 11 can be provided with a slot or a limiting device for fixing the electrode plate 20, which is convenient for fixing the position of the electrode plate 20 and taking out and overhauling the electrode plate 20.

The shell is provided with a fluid channel, the fluid channel is provided with a second inlet and a second outlet which are oppositely arranged, the fluid channel is arranged side by side with the flocculation cavity 11, the second outlet is communicated with the first inlet, the first outlet is communicated with the second inlet, the liquid inlet 12 and the liquid outlet 13 are both positioned above the fluid channel and the flocculation cavity 11, the liquid inlet 12 is communicated with the second inlet, and the liquid outlet 13 is communicated with the first outlet. Specifically, after entering from the liquid inlet 12, the fluid flows into the fluid channel first, and then flows into the flocculation chamber 11 from the fluid channel.

The fluid passage comprises a vertical section 14 and a bent section 15 which are communicated in sequence, one end of the vertical section 14, which is far away from the bent section 15, forms a second inlet, one end of the bent section 15, which is far away from the vertical section 14, forms a second outlet, the lowest part of the bent section 15 is provided with a sewage discharge pipeline, and the sewage discharge pipeline is provided with a sewage discharge valve 40. The arrangement of the bending section 15 can ensure that the fluid changes direction smoothly, and the flow resistance of the fluid is reduced. By providing a blowdown conduit and a blowdown valve 40, sludge deposited in the conduit can be conveniently drained.

The electric flocculation device also comprises a driving device, wherein the driving device is arranged in the fluid channel and is used for driving the fluid to move. By providing the drive means, the fluid may be driven to flow within the housing. Through the cooperation of the fluid channel, the flocculation cavity 11 and the driving device, the fluid can circularly flow in the fluid channel and the flocculation cavity 11, so that the fluid can be fully treated. After the fluid in the shell is treated, untreated fluid is introduced into the shell, and the treated fluid in the shell can be discharged from the liquid outlet.

Specifically, the driving device includes: motor 31, reducer 32, and propeller 33. Wherein, motor 31 has an output shaft, reduction gear 32 is set up on the output shaft of motor 31, propeller 33 is connected with reduction gear 32, and motor 31 drives propeller 33 through reduction gear 32 and rotates. In order to stabilize the rotation of the impeller 33, the drive device further comprises a bearing 34, and the impeller 33 is disposed in the fluid passage through the bearing 34. In this embodiment, the motor 31 is a variable frequency motor, and the variable frequency motor can adjust the rotation speed of the output shaft, so as to change the rotation speed of the propeller 33, further change the flow rate of the return water, and achieve the purpose of adjusting the floating height of the particle electrode.

In this embodiment, the electric flocculation apparatus further comprises: a supporting plate 50 and a water distributor 60. Wherein the support plate 50 is arranged in the flocculation chamber 11, the support plate 50 is located at the first inlet, the support plate 50 has a plurality of flow holes for the passage of fluid. By providing the support plate 50, the particle electrodes can be dropped onto it when the apparatus is out of service. In operation, fluid can pass from below up through the support plate 50. The water distributor 60 is arranged on the bearing plate 50, and the water distributor 60 is arranged to facilitate water flow to uniformly penetrate through the bearing plate 50, so that particle electrodes are uniformly fluidized, and large-scale convection is avoided.

Wherein the electric flocculation apparatus further comprises a sensor 70, the sensor 70 is arranged in the flocculation chamber 11, and the sensor 70 is used for detecting the position of the particle electrode in the flocculation chamber 11. Specifically, the sensors 70 may be fixed to the upper and lower edges of the electrode plate 20 in two groups. When the particle electrode works normally, the particle electrode should be positioned between the upper sensor and the lower sensor. The position of the particle electrode can be detected and controlled conveniently by arranging the sensor 70. Specifically, the signals of the sensors 70 can be transmitted to the PLC controller, and the PLC controller adjusts the rotation frequency of the propeller 33 through logic judgment, so as to control the particle electrodes between the upper and lower sensors 70.

Wherein, this electric flocculation device still includes: a first weir plate 81 and a second weir plate 82. Wherein a first overflow weir 81 is provided at the first outlet. Through setting up first overflow weir plate 81, can make flocculation chamber 11 and fluid passage smooth transition connect to the backward flow water after guaranteeing the overflow is stable to flow. The second overflow weir 82 is provided at the liquid outlet 13, and the second overflow weir 82 is provided at a position higher than that of the first overflow weir 81. Can guarantee the stability of backward flow water through above-mentioned device, also can prevent the loss of particle electrode.

When the device works, the propeller 33 pushes water flow in the fluid channel to form a circulation loop in the flocculation cavity 11 and the fluid channel. Water flows from bottom to top in the flocculation cavity 11, the particle electrodes and the insulating particles are arranged in the flocculation cavity 11, and the water flow drives the particle electrodes and the insulating particles to flow so that the particle electrodes and the insulating particles are in a fluidized state. The fluidized particle electrodes are in a scattered state, and the distance between the particle electrodes is increased, so that the particle electrodes cannot be continuously contacted with each other. After the electrode plate 20 is electrified, because the liquid in the flocculation chamber 11 has certain conductivity, a uniform electric field gradient is formed in the flocculation chamber 11. The particle electrode suspended in the flocculation chamber 11 now, being a good conductor, results in an equal potential across the particle electrode surface. But because of the electric field gradient formed by incomplete conduction of the liquid, the surface of the particle electrode has a potential relative to the liquid at the position, the potential enables the surface of the particle electrode to generate redox reaction, organic matters in water are oxidized, and the corroded metal ions form hydroxide colloid to play a role in gel breaking and flocculation. As the current is consumed the particle electrodes become progressively smaller and the position in the flocculation chamber 11 moves upwardly so as to pass over the first overflow weir 81 and eventually settle for recovery at the very bottom of the curved section 15.

In the working process of the device, the particle electrodes continuously change direction and position under the action of water flow, the surface of the particle electrodes is not easy to form an ion convergence phenomenon in a fixed state, the polarization phenomenon on the surfaces of the particle electrodes is eliminated, hydroxide scale is eliminated, the passivation phenomenon is avoided or reduced, the particle electrodes are always in an activated state, and the working efficiency of the device is improved. Further, the particle electrodes collide with each other and rub against each other in a fluidized state, and self-cleaning is continuously performed. The up-and-down floating particle electrodes can also collide and rub the electrode plate 20, so that the cleaning effect is achieved, the surface of the electrode plate 20 is not scaled, and the overall operation efficiency and stability of the equipment are improved. This device only need regularly supply the granule electrode can, because do not have the problem of board interval, can thicken plate electrode 20, reduce the frequency of change maintenance, greatly reduced the maintenance work load and the treatment cost of equipment.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An electroflocculation apparatus, comprising:

the device comprises a shell, a liquid inlet (12) and a liquid outlet (13) are arranged on the shell, and the liquid inlet (12) and the liquid outlet (13) are respectively communicated with the flocculation cavity (11);

the electrode plates (20) are arranged in the flocculation cavity (11) side by side at intervals, and the extending direction of each electrode plate (20) is the same as the flowing direction of the fluid;

a particle electrode located within the flocculation chamber (11).

2. An electroflocculation device according to claim 1, wherein the flocculation chamber (11) has a first inlet and a first outlet arranged in opposition, the first inlet being located below the first outlet.

3. An electroflocculation device according to claim 2, wherein the flow area of the flocculation chamber (11) is gradually larger from the first inlet to the first outlet.

4. The electrocoagulation apparatus according to claim 2, wherein the housing has a fluid channel having a second inlet and a second outlet arranged oppositely, the fluid channel being arranged side by side with the flocculation chamber (11), and the second outlet being in communication with the first inlet, the first outlet being in communication with the second inlet, the liquid inlet (12) and the liquid outlet (13) both being located above the fluid channel and the flocculation chamber (11), the liquid inlet (12) being in communication with the second inlet, and the liquid outlet (13) being in communication with the first outlet.

5. The electroflocculation apparatus of claim 1, further comprising:

insulating particles located within the flocculation chamber (11).

6. An electroflocculation apparatus as claimed in claim 4, further comprising a drive means for driving fluid flow, the drive means comprising:

a motor (31) having an output shaft;

a speed reducer (32) provided on an output shaft of the motor (31);

the propeller (33) is connected with the speed reducer (32), the propeller (33) is arranged in the fluid channel, and the motor (31) drives the propeller (33) to rotate through the speed reducer (32).

7. The electroflocculation apparatus according to claim 4, wherein the fluid channel comprises a vertical section (14) and a curved section (15) in serial communication, the end of the vertical section (14) remote from the curved section (15) forming the second inlet, the end of the curved section (15) remote from the vertical section (14) forming the second outlet, the lowest of the curved section (15) being provided with a drain on which a drain valve (40) is arranged.

8. The electroflocculation apparatus of claim 2, further comprising:

a support plate (50) arranged within the flocculation chamber (11), the support plate (50) being located at the first inlet, the support plate (50) having a plurality of flow holes for the passage of fluid;

the water distributor (60) is arranged on the bearing plate (50).

9. The electroflocculation apparatus of claim 1, further comprising:

a sensor (70) disposed within the flocculation chamber (11), the sensor (70) for detecting the position of the particle electrode within the flocculation chamber (11).

10. The electroflocculation apparatus of claim 2, further comprising:

a first overflow weir (81) disposed at the first outlet;

and the second overflow weir plate (82) is arranged at the liquid outlet (13), and the arrangement position of the second overflow weir plate (82) is higher than that of the first overflow weir plate (81).

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