CN210656508U - Continuous reaction electric flocculation electroplating sewage treatment device - Google Patents
Continuous reaction electric flocculation electroplating sewage treatment device Download PDFInfo
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- CN210656508U CN210656508U CN201920549806.4U CN201920549806U CN210656508U CN 210656508 U CN210656508 U CN 210656508U CN 201920549806 U CN201920549806 U CN 201920549806U CN 210656508 U CN210656508 U CN 210656508U
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Abstract
The utility model provides a continuous reaction electric flocculation electroplating sewage treatment device, which comprises an electric flocculation reaction unit, an ozone generator and an adsorption reaction unit which are communicated with an electroplating sewage inlet pipe, wherein the electroplating sewage inlet pipe is a three-way inlet pipe with a first three-way switching valve; the ozone generator is arranged above the water outlet side of the electric flocculation reaction unit, and the ozone inlet direction and the water inlet direction are oppositely arranged; the anode of the electric flocculation reaction unit is a horizontal rotating spiral iron electrode, the cathode is a rod-shaped iron electrode, the anode is wound around the cathode in a rotating mode, and one end of the anode is connected with one end of the cathode; and an adsorption medium is arranged in the adsorption reaction unit, and the adsorption reaction unit is provided with a water outlet and a three-way water outlet pipe which is connected with the water outlet and is provided with a second three-way switching valve. The utility model provides a processing apparatus can the continuous reaction, and heavy metal ion and organic pollutant clearance are high.
Description
Technical Field
The utility model belongs to electroplate sewage treatment field, concretely relates to continuous reaction electric flocculation electroplating sewage treatment plant.
Background
The main pollutants in the electroplating sewage are heavy metal ions and organic pollutants, the heavy metal ions have high toxicity and belong to non-degradable conservative substances, after the heavy metal ions enter a water environment, the high concentration can cause polar poisoning of aquatic organisms, and the low concentration can cause chronic poisoning. The prior art has already existed a lot of electroplating sewage treatment facilities, and the patent application with application number 200910061863.9 discloses a sewage treatment method and its device, the device is equipped with the electric flocculation container body that electric flocculation and ozone catalytic oxidation go on simultaneously, and is provided with the absorption filter container body with activated carbon behind the electric flocculation container body, is used for further getting rid of the organic matter in the sewage, the device sets up electric flocculation and ozone catalytic oxidation reaction in the electric flocculation container body to take place simultaneously, this is difficult to control the release amount of ozone, easily leads to too much ozone to further reoxidize the heavy metal ion that the electric flocculation reduced, and the adsorption capacity of activated carbon to organic waste is limited, thus lead to the device's heavy metal ion and organic matter get rid of the ability to be limited.
The patent application No. 201810189286.0 discloses a double-motor electro-flocculation-electro-catalysis ozone device and an industrial wastewater treatment method, wherein an ozone generator is separately arranged outside an electro-flocculation reaction container, an aluminum plate anode and a carbon-based cathode are adopted for the electro-flocculation reaction, but no device or step for further treating organic pollutants is adopted after the electro-flocculation reaction, and the organic pollutants in the industrial electroplating wastewater cannot be effectively removed.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electric flocculation electroplating sewage treatment device which can continuously react and has high removal rate of heavy metal ions and organic pollutants.
The utility model provides a following technical scheme: a continuous reaction electric flocculation electroplating sewage treatment device comprises an electric flocculation reaction unit, an ozone generator and an adsorption reaction unit which are communicated with an electroplating sewage inlet pipe, wherein the electroplating sewage inlet pipe is a three-way inlet pipe with a first three-way switching valve and is arranged below the electric flocculation reaction unit; the ozone generator is arranged above the water outlet side of the electric flocculation reaction unit, and the ozone inlet direction and the water inlet direction are oppositely arranged; the anode of the electric flocculation reaction unit is a horizontal rotating spiral iron electrode, the cathode is a rod-shaped iron electrode, the anode is wound around the cathode in a rotating mode, one ends of the anode and the cathode are connected with each other, and the other ends of the anode and the cathode are connected with an external direct current power supply in a single-pole mode; the adsorption reaction unit is internally provided with an adsorption medium, the adsorption reaction unit is provided with a water outlet and a three-way water outlet pipe which is connected with the water outlet and is provided with a second three-way switching valve, one end of the three-way water outlet pipe is connected with the three-way water inlet pipe, and a peristaltic pump is arranged between the three-way water outlet pipe and the three-way water inlet pipe. The peristaltic pump can pump the sewage that flows out through the tee bend outlet pipe in the adsorption reaction unit into again the electric flocculation reaction unit carries out continuous reaction, until heavy metal ion and the organic pollutant concentration in the electroplating sewage reduce to the standard value.
As the utility model discloses a further inject, the adsorption medium is chemical modification metallic oxide kernel nanoparticle, and modification metallic oxide kernel nanoparticle has the advantage that separation efficiency is high, easily recovery processing and simple operation process, can get rid of the Ag in the electroplating wastewater effectively+、Hg2+、Mn2+、Zn2+、Pb2+、 Cd2+、Cr6+、As3+、As5+、Co2+、Cu2 +And Ni2+Heavy metal ions, and organic contaminants.
As a further limitation of the present invention, the cathode is connected to one side of the external dc power supply and is further connected to an external mechanical rotator, the external mechanical rotator can be driven to rotate the cathode, the cathode is driven while rotating the anode horizontally winds the cathode rotating spiral, and then the cathode is in full contact with the electroplating sewage and the electric flocculation reaction is generated.
As a further limitation of the utility model, a magnetic field generating device is arranged outside the adsorption reaction unit, an oscillator and an ultrasonic generating device are arranged at the bottom of the adsorption reaction unit, wherein the magnetic field generating device can be used for separating the chemically modified metal oxide core nano particles without adsorption reaction capacity by a magnetic separation method, the ultrasonic wave generating device can enable the chemically modified metal oxide inner core nano particles without adsorption reaction capacity in the adsorption reaction unit to have adsorption reaction capacity again after being subjected to ultrasonic treatment, the oscillator is used for uniformly mixing the chemically modified metal oxide inner core nano particles with electroplating sewage in an adsorption reaction process, fully exerting the adsorption reaction capacity of the chemically modified metal oxide, fully reacting with heavy metal ions and adsorbing organic pollutants.
As a further limitation of the invention, the chemically modified metal oxide core nanoparticle is Fe3O4、Fe2O3、MgO、ZnO、TiO2、CeO2、Al2O3Or Mn3O4Is coated with one or more chemical modification substances of thiolactic acid, humic acid, dimercaptosuccinic acid, polymethyl methacrylate, ethylene diamine tetraacetic acid or poly L-cysteine.
As a further limitation of the utility model, the electric flocculation reaction unit is a U-shaped semi-cylindrical container, which can provide sufficient rotary contact reaction space for the horizontal rotation spiral anode and the rod-shaped cathode and the electroplating wastewater.
As a further limitation of the present invention, an air flow rotary flowmeter for monitoring and controlling the supply amount of ozone is further provided between the ozone generator and the electric flocculation reaction unit.
As the utility model discloses a further inject, the adsorption reaction unit still is provided with the sampling port, can pass through the sampling port is gathered the electroplating sewage in the electric flocculation reaction unit and is carried out heavy metal and organic pollutant's concentration determination.
The utility model has the advantages that: 1) electroplating sewage direction of intaking and ozone entering direction are the direction in opposite directions through the setting to positive pole in the electric flocculation reaction unit is horizontal rotation spiral electrode, and it is around the rotatory winding of bar negative pole, can effectively dual increase electroplating sewage's electric flocculation reaction degree, effectively improves heavy metal and organic pollutant's clearance.
2) Through ozone generating unit and the independent setting of electricity flocculation reaction unit, can effectively monitor ozone supply volume, avoid ozone excessively to provide.
3) The adsorption reaction unit is arranged behind the electric flocculation reaction unit, and the first three-way switching valve and the second three-way switching valve are arranged, so that the electroplating sewage can automatically carry out continuous electric flocculation reaction and ozone catalytic reaction until the electroplating sewage reaches the discharge standard; and the adsorption medium in the adsorption reaction unit is a chemically modified metal oxide core nanoparticle which can be repeatedly recycled and can effectively participate in the redox reaction and adsorption of heavy metal ions and organic pollutants, so that the removal rate of the heavy metals and the organic pollutants can be further improved.
Drawings
The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is a schematic view of the whole continuous reaction electrocoagulation sewage treatment plant provided by the utility model;
fig. 2 is a side view of the container of the electric flocculation reaction unit provided by the utility model.
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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in figure 1, a continuous reaction electric flocculation electroplating sewage treatment device comprises an electric flocculation reaction unit 1 communicated with an electroplating sewage inlet pipe, an ozone generator 2 and an adsorption reaction unit 3, wherein the electroplating sewage inlet pipe is a three-way inlet pipe 1-2 with a first three-way switching valve 1-1, the three-way inlet pipe 1-2 is connected with the electric flocculation reaction unit 1 through a water inlet 1-6 and is arranged below the electric flocculation reaction unit 1, and when the electroplating sewage inlet pipe introduces electroplating sewage into the electric flocculation reaction unit, the direction of the first three-way switching valve 1-1 is switched to communicate the electroplating sewage inlet with an electric flocculation reaction unit pipeline. The electric flocculation reaction unit 1 is a U-shaped semi-cylindrical container as shown in figure 2.
The ozone generator 2 is arranged above the water outlet side of the electric flocculation reaction unit 1, the ozone inlet direction and the water inlet direction are arranged oppositely, further when the ozone generator 2 works, the ozone is introduced into the electric flocculation reaction unit 1, the water inlet of the ozone and the electroplating sewage flows around the anode 1-3 and the cathode 1-4 of the electric flocculation reaction unit 1, the contact area of the electroplating sewage and the ozone with the anode 1-3 and the cathode 1-4 is increased, the anode 1-3 of the electric flocculation reaction unit is a horizontal rotating spiral iron electrode, the cathode 1-4 is a rod-shaped iron electrode, the anode 1-3 is wound around the cathode 1-4 in a rotating way, the anode 1-3 and the cathode 1-4 are connected with an external direct current power supply 4 in a single-pole mode, and the side of the cathode 1-4 connected with the external direct current power supply 4 is also connected with an external mechanical rotator 6, the external mechanical rotator drives the cathodes 1-4 to rotate, the cathodes 1-4 rotate to drive the anodes 1-3 to axially rotate along the cathodes, so that the contact areas of the anodes 1-3 and the cathodes 1-4 with the electroplating wastewater are further increased, and the efficiency of the electrocoagulation reaction can be effectively improved. An airflow rotary flowmeter 2-1 for monitoring and controlling the supply amount of ozone is arranged between the ozone generator 2 and the electric flocculation reaction unit 1.
An adsorption medium 3-1 is arranged in the adsorption reaction unit 3, and the adsorption medium 3-1 is chemically modified Fe3O4And TiO2Mixed metal oxide core nanoparticles with a surface coated with polymethylmethacrylate. The adsorption reaction unit 3 is provided with a water outlet 3-2 and a belt connected with the water outlet 3-2The device comprises a three-way water outlet pipe 3-4 of a second three-way switching valve 3-3, one end of the three-way water outlet pipe 3-4 is connected with a three-way water inlet pipe 1-2, so that the first three-way switching valve 1-1 can be switched, the three-way water outlet pipe 3-4 is communicated with a water inlet 1-6 of an electric flocculation reaction unit 1, the adsorption reaction unit 3 is communicated with the electric flocculation reaction unit 1, a peristaltic pump 5 is arranged between the three-way water outlet pipe 3-4 and the three-way water inlet pipe 1-2, and the peristaltic pump 5 can pump the sewage flowing out of the adsorption reaction unit 3 through the three-way water outlet pipe 3-4 into the electric flocculation reaction unit 1 again for continuous reaction until the concentration of heavy metal ions and organic pollutants in the. When the peristaltic pump 5 is needed to pump the electroplating sewage in the adsorption reaction unit 3 into the electrocoagulation reaction unit 1, the second three-way switching valve 3-3 and the first three-way switching valve 1-1 are switched respectively to communicate the adsorption reaction unit 3 with the electrocoagulation reaction unit 1, and the electroplating sewage entering and the water outlet of the adsorption reaction unit 3 are closed.
A magnetic field generating device 3-5 is arranged outside the adsorption reaction unit 3, an oscillator 3-7 and an ultrasonic generating device 3-8 are arranged at the bottom of the adsorption reaction unit 3, wherein the magnetic field generating device 3-5 can be used for separating the chemically modified metal oxide core nano particles without adsorption reaction capability by a magnetic separation method, the ultrasonic wave generating device 3-8 can be used for treating the chemically modified metal oxide core nano particles without adsorption reaction capability in the adsorption reaction unit by ultrasonic wave and then have adsorption reaction capability again, the oscillator is used for uniformly mixing the chemically modified metal oxide inner core nano particles with electroplating sewage in an adsorption reaction process, fully exerting the adsorption reaction capacity of the chemically modified metal oxide, fully reacting with heavy metal ions and adsorbing organic pollutants.
The working principle is as follows: switching a first three-way switching valve 1-1 to introduce electroplating sewage into an electrocoagulation reaction unit 1, closing a second three-way switching valve 3-3 to ensure that the electroplating sewage is remained in a reaction device, starting a direct current power supply 4, an ozone generator 2 and a mechanical rotator 6 to enable the electrocoagulation reaction and the ozone catalytic reaction to occur in the electrocoagulation reaction unit 1 at the same time, monitoring and controlling the ozone supply amount by an airflow rotary flowmeter 2-1 to prevent the ozone from being excessively supplied, enabling the ozone supply direction and the electroplating sewage supply direction to be opposite and forming convection in the electrocoagulation reaction unit 1 to flow around an anode 1-3 and a cathode 1-4, increasing the contact area of the electroplating sewage, the ozone, the anode 1-3 and the cathode 1-4, and enabling the cathode 1-4 to axially rotate under the drive of the mechanical rotator 6, the anode 1-3 is driven by the cathode 1-4 to rotate around the horizontal axis of the cathode, so that the contact area between the anode 1-3 and the cathode 1-4 and the electroplating wastewater is further increased, and the efficiency of the electric flocculation reaction can be effectively improved. After the wastewater in the electric flocculation reaction unit 1 is subjected to electric flocculation and ozone catalytic reaction, the wastewater enters an adsorption reaction unit 3, an oscillator 3-7 is started, NaOH or HCl is added to maintain the pH required by chemically modified metal oxide core nanoparticles in the adsorption reaction unit, the reaction temperature is maintained at 25-28 ℃, the rotating speed of the oscillator is maintained at 250-300 rpm, the wastewater is continuously oscillated for 24 hours, after the adsorption reaction of the chemically modified metal oxide core nanoparticles in the adsorption reaction unit 3, heavy metal ions and organic pollutants are further chemically reduced and adsorbed, the removal rate of the heavy metal ions and the organic pollutants is improved, various indexes of the electroplating wastewater are sampled and monitored through a sampling port 3-9 of the adsorption reaction unit 3, if further electric flocculation reaction and ozone catalytic reaction are required, a second three-way switching valve 3-3 and a first three-way switching valve 1-1 are rotated, and the adsorption reaction unit 3 and the electric flocculation reaction unit 1 are communicated, so that the electroplating sewage enters the electric flocculation reaction unit again to generate continuous electric flocculation reaction and ozone catalytic reaction, and if the indexes of heavy metal ions and organic pollutants in the electroplating sewage reach the discharge standard after sampling monitoring, the direction of the second three-way switching valve 3-3 is switched, so that the treated electroplating sewage is discharged through a water outlet 3-2.
When the chemically modified metal oxide core nanoparticles in the adsorption reaction unit 3 are adsorbed and saturated and lose the oxidation-reduction reaction and adsorption capacity with heavy metal ions and organic pollutants, the magnetic field generating device 3-5 can be started to separate the chemically modified metal oxide core nanoparticles out of the adsorption reaction unit 3 by a magnetic separation method, and the chemically modified metal oxide core nanoparticles are recycled and added into the adsorption reaction unit again; or starting the ultrasonic generating device 3-8, and regenerating and recycling the chemically modified metal oxide core nano particles through ultrasonic treatment for 1 h.
Example 2
This example differs from example 1 only in that the adsorption medium is Fe2O3And Al2O3A mixed metal oxide core coated with thiolactic acid and dimercaptosuccinic acid on a surface thereof.
Example 3
This example differs from examples 1 and 2 only in that the adsorption medium is CeO2The surface of the metal oxide inner core is coated with ethylene diamine tetraacetic acid.
The electroplating sewage treated by the utility model can reach the three types of electroplating sewage discharge standards of the national GB21900-2008 'electroplating pollutant discharge standard'.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (7)
1. A continuous reaction electric flocculation electroplating sewage treatment device comprises an electric flocculation reaction unit (1) communicated with an electroplating sewage inlet pipe, an ozone generator (2) and an adsorption reaction unit (3), and is characterized in that the electroplating sewage inlet pipe is a three-way inlet pipe (1-2) with a first three-way switching valve (1-1) and is arranged below the electric flocculation reaction unit; the ozone generator (2) is arranged above the water outlet side of the electric flocculation reaction unit (1), and the ozone inlet direction and the water inlet direction are oppositely arranged; the anode (1-3) of the electric flocculation reaction unit is a horizontal rotating spiral iron electrode, the cathode (1-4) is a rod-shaped iron electrode, the anode (1-3) is wound around the cathode (1-4) in a rotating mode, one end of the anode (1-3) and one end of the cathode (1-4) are connected with each other, and the other end of the anode (1-3) and the other end of the cathode (1-4) are connected with an external direct current power supply (4) in a single-pole mode; an adsorption medium (3-1) is arranged in the adsorption reaction unit (3), the adsorption reaction unit (3) is provided with a water outlet (3-2) and a three-way water outlet pipe (3-4) which is connected with the water outlet (3-2) and is provided with a second three-way switching valve (3-3), one end of the three-way water outlet pipe (3-4) is connected with the three-way water inlet pipe (1-2), and a peristaltic pump (5) is arranged between the three-way water outlet pipe (3-4) and the three-way water inlet pipe (1-2).
2. The continuous reaction electrocoagulation-electroplating sewage treatment device according to claim 1, wherein the adsorption medium (3-1) is chemically modified metal oxide core nanoparticles.
3. The continuous reaction electro-flocculation electroplating sewage treatment device according to claim 1 or 2, wherein the cathode (1-4) is connected with an external direct current power supply and an external mechanical rotator (6).
4. The continuous reaction electro-flocculation electroplating sewage treatment device according to claim 3, wherein a magnetic field generating device (3-5) is arranged outside the adsorption reaction unit (3), and an oscillator (3-7) and an ultrasonic wave generating device (3-8) are arranged at the bottom of the adsorption reaction unit (3).
5. The continuous reaction electrocoagulation-electroplating sewage treatment device according to claim 3, wherein the electrocoagulation reaction unit (1) is a U-shaped semi-cylindrical container.
6. The continuous reaction electric flocculation electroplating sewage treatment device according to claim 3, wherein an airflow rotary flowmeter (2-1) for monitoring and controlling the supply amount of ozone is further arranged between the ozone generator (2) and the electric flocculation reaction unit (1).
7. The continuous reaction electro-flocculation electroplating sewage treatment device according to claim 3, wherein the adsorption reaction unit (3) is further provided with sampling ports (3-9).
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| CN201920549806.4U CN210656508U (en) | 2019-04-22 | 2019-04-22 | Continuous reaction electric flocculation electroplating sewage treatment device |
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| CN201920549806.4U CN210656508U (en) | 2019-04-22 | 2019-04-22 | Continuous reaction electric flocculation electroplating sewage treatment device |
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