CN209759086U - Spiral type rotating electrode of sewage electrolytic tank - Google Patents

Spiral type rotating electrode of sewage electrolytic tank Download PDF

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Publication number
CN209759086U
CN209759086U CN201920067638.5U CN201920067638U CN209759086U CN 209759086 U CN209759086 U CN 209759086U CN 201920067638 U CN201920067638 U CN 201920067638U CN 209759086 U CN209759086 U CN 209759086U
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electrode
sewage
spiral
plate
rotating shaft
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韦志锋
曾小波
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Chongqing University of Science and Technology
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韦志锋
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Abstract

A spiral rotary electrode of sewage electrolyzer features that the generatrix of two long-strip conducting thin plates and the axis of rotary shaft are inclined by a certain angle, and a spiral movable electrode body is uniformly coiled on the external surface of insulating rotary shaft to form a spiral truncated cone. In the process of sewage electrolysis treatment, the electrode body rotates slowly, and the phenomena of adhesion, accumulation and blockage of floccules on the polar plate are avoided. The driving effect of the continuous inclined spiral electrode plate structure on the sewage is enhanced, the sewage treatment reaction time can be artificially controlled, and the continuous inclined spiral electrode plate structure is impact-resistant; the spiral rotating electrode has the advantages of large effective area of electrochemical reaction, large specific surface area, high electrolytic treatment efficiency, small occupied area and the like.

Description

Spiral type rotating electrode of sewage electrolytic tank
Technical Field
The utility model relates to a spiral type rotation electrode of a sewage electrolytic tank, which can oxidize and disinfect sewage through electrochemistry, clarify water and improve sewage treatment effect, and belongs to the field of sewage electrolytic treatment.
Background
In recent years, the economy of China is rapidly developed, the discharge amount of urban sewage is continuously increased, the urban water environment is seriously polluted, and the sewage problem is a serious environmental protection and economic problem in China at present. Because the sewage treatment cost is high, the financial investment is difficult to continue, the sewage treatment rate in China is very low, and the development of the sewage treatment industry is greatly restricted by the sewage treatment cost and the sewage treatment efficiency. Therefore, the new process and the new equipment for sewage treatment with low research and development cost, high speed and high efficiency are the development direction of the sewage treatment industry.
The electrolytic sewage treating method is that inside the electrolytic bath, polar plates are powered to make the harmful matter in the sewage produce oxidation and reduction reaction separately on the cathode and the anode and convert into harmless matter for purifying sewage.
Of the many metallic materials that can be used as electrodes, aluminum and iron are most often chosen as the cell plates due to their good solubility and relatively low cost. When the industrial wastewater contains a large amount of heavy metal pollutants, acid and alkali pollutants and the like, iron is mostly adopted as an electrode; for relatively light-polluted domestic sewage, metal aluminum is mostly adopted as an electrode. This is because the aluminum electrode is stable and clean in water discharge, and can meet higher treatment requirements. The electrolyzer requires a suitable spacing between the two plates to ensure a low consumption of electrical energy and to facilitate installation, operation and maintenance.
The water treatment method comprises electrochemical action, indirect oxidation and indirect reduction action (chemical reaction is carried out between chemical products generated by an electrode-liquid phase interface and substances in water), electroflotation action (floating of tiny O 2 and H 2 bubbles generated in the electrolytic process), electroflocculation action (the ions dissolved by an iron or aluminum metal anode are further hydrolyzed to become water-insoluble metal hydroxide active coagulants such as ferrous hydroxide or aluminum hydroxide, and the like, wherein the substances have a porous gel structure, have surface charge action and strong adsorption action, can carry out cohesion and coagulation action on organic or inorganic pollutants in the wastewater, and can enable the pollutants to be coagulated mutually and separated from the wastewater), and the like on the surface of an electrode.
the advantages of the electrolytic treatment are: the low-voltage direct-current power supply is used, a large amount of chemical agents are not consumed, the operation is carried out at normal temperature and normal pressure, and the management is simple and convenient; if the concentration of pollutants in the wastewater changes, the stability of the effluent quality can be ensured by adjusting the voltage and the current; the processing device occupies small area. The disadvantages are that: the power consumption is consumed when a large amount of waste water is treated, the consumption of a dissolubility anode of the device is large, dissolved anode particles form a flocculating agent as nucleation points, suspended solids in the sewage are precipitated, a large amount of flocculent suspended matters are attached to a plate electrode, the flow rate of water flowing is low, the flocculent suspended matters can be attached to the plate electrode more and more, the fault of a flocculation device between the plate electrodes is caused, the voltage of an electric field is high, and the device can frequently give an alarm to cause the shutdown of the whole.
Disclosure of Invention
In order to solve the problems that the consumption of the soluble anode is large, a large amount of flocculent suspended matters are attached to the electrode plate, which causes the defects of low water flow, frequent flocculation device failure between the electrode plates and the like, the utility model creatively invents the rotating structure type electrode: the two polar plates are arranged at a proper distance to ensure that the electric energy consumption is less and the installation, the operation and the maintenance are convenient; the two electrode sheets are parallel to each other and spirally wound on the same insulating rotating shaft to form a spiral electrode rotating during working. The rotary spiral body electrode has the characteristics of large effective area of electrochemical reaction, large specific surface area and high electrolytic treatment efficiency; the transmission device drives the electrode shaft body to rotate in the electrolytic bath at a low angular speed, the rotating inclined polar plate enables precipitates to slide and move downwards under the action of gravity and circumferential shearing force, and finally the precipitates fall into the bottom of the tank from the inclined polar plate and sink into the mud storage hopper, so that adsorption, accumulation and blockage phenomena cannot be generated on the inclined polar plate.
Because the inclined polar plate rotates along with the rotating shaft. The rotating shaft is rotated quickly to form strong turbulent shear flow, so that the inclined polar plate can be scoured at high speed, and possible silting and blocking can be removed conveniently.
The utility model provides a technical scheme that its technical problem adopted:
A spiral rotating electrode of a sewage electrolysis bath is characterized in that: two strip-shaped conductive electrode plates (made of iron or aluminum) are arranged at a proper interval, the two electrode plates are always insulated and parallel to each other, and are spirally and uniformly coiled and fixed on the same insulating rotating shaft in a truncated cone shape with the outward inclination of inward convergence and the mutual inclination of a bus and the axis of the rotating shaft at a certain angle, so that an electrode body consisting of a double-wire spiral electrode plate and the insulating rotating shaft is formed; one polar plate is connected with the positive pole of the power supply, and the other polar plate is connected with the negative pole of the power supply; 1-6 metal plates which are parallel to the cathode plate and the anode plate, independent from each other and insulated can be clamped between the cathode plate and the anode plate of the electrolytic cell; the electrode body is immersed in the sewage electrolytic tank, and the transmission device drives the insulating rotating shaft to rotate in the electrolytic tank at a lower angular speed; the electrolytic cell is filled with sewage, water flows in the electrolytic cell along the axial direction of the rotating shaft, flows into the electrolytic cell from one end of the rotating shaft, and flows out of the electrolytic cell from the other end; the bottom of the tank is provided with a mud storage hopper.
The utility model has the advantages that the adhesion, accumulation and blockage of floccules are not generated on the spiral rotating electrode polar plate; the continuous inclined spiral electrode polar plate structure has the advantages that the driving effect on sewage is enhanced, the sewage treatment reaction time can be artificially controlled, the impact resistance is realized, the treatment effect is good, and the removal rate is high; the rotating spiral body electrode has the advantages of large effective area of electrochemical reaction, large specific surface area, high electrolytic treatment efficiency, small occupied area and the like; if one or a series of parallel metal plates are added between the cathode and the anode of the electrolytic cell, the metal plates show the cathode polarity towards the anode surface and the anode polarity towards the cathode surface to form a bipolar electrode, and the formed electrolytic cell is the bipolar electrolytic cell; the spiral rotating electrode is simple in connection, safe in operation and capable of obviously reducing power consumption, so that an energy-saving effect is achieved.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a longitudinal sectional view of the present invention.
Fig. 3 is a perspective view of the three-wire spiral electrode plate of the present invention.
In the figure: 1. electrolytic bath 2, sewage 3, central water inlet pipe 4, reflecting plate 5, water outlet
6. Water outlet weir 7, water outlet groove 8, deposited dirt 9, mud storage bucket 10, mud discharging pipe
11. A double spiral electrode plate 12, a hollow rotating shaft.
Detailed Description
In the embodiment shown in fig. 2, the utility model (11) made of aluminum is sleeved outside the central sewage inlet pipe (3) and supported by the bracket. One polar plate is connected with the positive pole of the power supply, the other polar plate is connected with the negative pole of the power supply, and the circuits are respectively powered by a collecting ring of the hollow rotating shaft (12). The sewage (2) enters the tank (1) from top to bottom through a water inlet pipe (3) arranged at the center of the electrolytic tank (1), the wastewater is horizontally and uniformly diffused by a pipe lower umbrella-shaped baffle (4), after being limited by an umbrella-shaped cover-shaped space formed by an inclined electrode polar plate (11), the sewage (2) is gathered in a lower wedge shape of the electrode polar plate (11) and attached to the lower surface of the electrode polar plate (11), and flows upwards in a winding manner in a spiral seam of the polar plate (11), a series of electrochemical reactions are generated on the electrode polar plate (11) to be purified, and the sewage flows out from the upper end of the polar plate (11), overflows over a water outlet weir (6), enters a water outlet tank (7), and is conveyed to the next procedure through a water outlet (5).
The sewage (2) flowing in from the water inlet (3) respectively flows into a series of spiral narrow gaps with long length formed by the gaps of the polar plates (11), the moving direction of the fluid is limited by the bent wall plates, and moving particles with different component speeds collide against the wall plates in all directions. Because the boundary layer near the solid wall surface has large viscosity, the moving particles stall after collision, then collide and stall again, finally the moving speed is reduced to zero, the energy is exhausted at the solid-liquid boundary, and the moving particles are deposited or adhered on the wall plate. The solid-liquid boundary region is the primary region where the suspension forms aggregates.
On the solid-liquid boundary of the electrode, the electrolysis generates active oxygen atoms O with strong oxidizing property, or the oxygen atoms O contacts with bacteria in the sewage to eliminate the bacteria in the sewage, or the oxygen atoms O and organic matters in the sewage generate oxidative decomposition reaction to be decomposed into CO 2 and H 2 O, iron or aluminum ions losing electrons are dissolved into water and further hydrolyzed to form a water-insoluble metal hydroxide active flocculant such as ferrous hydroxide or aluminum hydroxide, and the substance is in a porous gel structure, has surface charge effect and strong adsorption effect, is used as a nucleation point to form a flocculant, can carry out cohesive coagulation effect on organic or inorganic pollutants in the wastewater, and enables suspended solids and pollutants in the sewage to mutually coagulate and precipitate, thereby purifying the water.
The settled sewage (8) slides downwards along the radial inclined plane, the direction is always vertical to the water flow direction of spiral rising, the downward sliding interference of the water flow power to the settled sewage (8) is very small, the sedimentation of cocurrent flow or incongruous flow is avoided, and the influence or interference of the water flow power to the gravity borne by the suspended particles is avoided, so that a more ideal settling effect can be obtained.
When sewage flows upwards in the spiral seam of the polar plate in a winding manner, the electrochemical reaction always occurs as the effect is accompanied, the longer the length of the spiral polar plate is, the more sufficient the electrochemical reaction is, and the more thorough the purification of the sewage is.
The transmission device drives the electrode shaft body (12) to rotate in the electrolytic bath (1) at a low angular speed. The rotating inclined polar plate (11) causes the sediment (8) to slide and move downwards under the action of gravity and circumferential shearing force, and finally falls into the bottom of the tank from the inclined polar plate (11) and sinks into the mud storage hopper (9), so that the phenomena of adsorption, accumulation and blockage on the inclined polar plate (11) can be avoided.
The inclined polar plate (11) rotates along with the rotating shaft (12). By quickly rotating the rotating shaft (12), the inclined polar plate (11) which is inclined and raised outwards is just like a blade which flies and rotates at a high speed, and strong turbulent shear flow is formed, so that the inclined polar plate (11) can be scoured at a high speed, and possible silting and blocking can be removed very conveniently.
The two electrode sheets are mutually parallel and spirally wound on the same insulating rotating shaft (12) and rotate, so that the defect that flocculent suspended matters are attached to the electrode (11) is overcome, the contact area of a liquid phase-electrode polar plate is relatively increased, the mass transfer coefficient and the reaction speed are increased, the electrochemical reaction process is promoted, and the reaction efficiency is improved.
All substances in a space column formed by the motion trail of the rotary electrode polar plate (11), including water molecules, suspended matters, microorganisms and the like, have the opportunity of being in direct contact with the surface of the electrode (11) in a rotation period, fully participate in electrochemical action, indirect oxidation and indirect reduction action (chemical reaction is generated between chemical products generated near the electrode and substances in water), electroflotation action (floating of micro O 2 and H 2 bubbles generated in the electrolytic process), electroflocculation action and the like on the surface of the electrode (11) instead of being realized only by slow diffusion action of objects in liquid (2), and the rotating spiral body (11) has stirring action on the water body (2), so that under the stirring action, the materials in an electrode area and a non-electrode area have stronger fluidity, thereby improving the mass transfer rate.
Fig. 3 is a perspective view of the three-wire spiral electrode plate of the present invention, the left and right electrode plates are connected to the positive and negative electrodes of the power supply respectively, and the metal plate sandwiched in the middle is not connected to the power supply. Under the induction of bipolar electric field, the plate has cathode-developing property towards the anode surface and anode-developing property towards the cathode surface to form a bipolar electrode. The plate is not electrified, but still plays a role in electrolyzing sewage, thereby achieving the energy-saving effect.

Claims (1)

1. A spiral rotating electrode of a sewage electrolysis bath is characterized in that: two strip-shaped conductive electrode plates are arranged at a proper interval, the two electrode plates are always insulated from each other and are parallel to each other, and the two electrode plates are spirally and uniformly coiled and fixed on the same insulating rotating shaft in a round table shape with the inward convergence outside inclined and the bus inclined to the axis of the rotating shaft at a certain angle, so that an electrode body consisting of a double-wire spiral electrode plate and the insulating rotating shaft is formed; one polar plate is connected with the positive pole of the power supply, and the other polar plate is connected with the negative pole of the power supply; clamping 1-6 metal plates which are parallel to the cathode plate and the anode plate, independent from each other and insulated between the cathode plate and the anode plate of the electrolytic cell; the electrode body is immersed in the sewage electrolytic tank, and the transmission device drives the insulating rotating shaft to rotate in the electrolytic tank at a lower angular speed; the electrolytic cell is filled with sewage, water flows in the electrolytic cell along the axial direction of the rotating shaft, flows into the electrolytic cell from one end of the rotating shaft, and flows out of the electrolytic cell from the other end; the bottom of the tank is provided with a mud storage hopper.
CN201920067638.5U 2019-01-16 2019-01-16 Spiral type rotating electrode of sewage electrolytic tank Active CN209759086U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920067638.5U CN209759086U (en) 2019-01-16 2019-01-16 Spiral type rotating electrode of sewage electrolytic tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920067638.5U CN209759086U (en) 2019-01-16 2019-01-16 Spiral type rotating electrode of sewage electrolytic tank

Publications (1)

Publication Number Publication Date
CN209759086U true CN209759086U (en) 2019-12-10

Family

ID=68749170

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920067638.5U Active CN209759086U (en) 2019-01-16 2019-01-16 Spiral type rotating electrode of sewage electrolytic tank

Country Status (1)

Country Link
CN (1) CN209759086U (en)

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Effective date of registration: 20191202

Address after: 401313 No. 20 East Road, University Town, Shapingba District, Chongqing

Patentee after: Chongqing University of Science & Technology

Address before: 400042 No. 1, petroleum Road, Yuzhong District, Chongqing

Patentee before: Wei Zhifeng