CN109626521A - High-frequency impulse electrochemistry handles fluoride waste method and device thereof - Google Patents
High-frequency impulse electrochemistry handles fluoride waste method and device thereof Download PDFInfo
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- CN109626521A CN109626521A CN201910071843.3A CN201910071843A CN109626521A CN 109626521 A CN109626521 A CN 109626521A CN 201910071843 A CN201910071843 A CN 201910071843A CN 109626521 A CN109626521 A CN 109626521A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C02F2001/007—Processes including a sedimentation step
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- C02F2101/00—Nature of the contaminant
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- C02F2101/12—Halogens or halogen-containing compounds
- C02F2101/14—Fluorine or fluorine-containing compounds
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
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- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
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- C02F2209/005—Processes using a programmable logic controller [PLC]
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Abstract
The invention discloses high-frequency impulse electrochemistries to handle fluoride waste method and device thereof, and the task of the present invention is what is completed in this way, includes the following steps；Water distribution、Through step 1 waste water adjusted, by water distribution area lower part water distributing pore even into electrochemical reaction area.Waste water after step 2 reaction, by reaction zone top even into rear reaction zone, waste water is set adequately to react in rear reaction zone, step 5, the waste water after step 4 coagulating enter settling zone by bottom, waste water is after precipitating clarification, the overflow weir standard discharge that clarified wastewater is arranged through settling zone top, the sludge being deposited in settling zone bottom pyramidal slot, is discharged by sludge pipe.The present invention has the effect that the integration apparatus of the technologies such as collection electrochemical oxidation, reduction, flocculation, and structure is simple, and occupied area is small；The abilities such as redox reaction and flocculation are stronger compared with other methods ability, and operation is controllable, stable effluent quality；Secondary pollution is few, high degree of automation, is convenient for operational administrative.
Description
Technical field
Fluoride waste method and device thereof are handled with high-frequency impulse electrochemistry the present invention relates to a kind of, especially suitable for enterprise
It is used when fluoride wastewater treatment.
Background technique
Fluoride is not only limited to bone and tooth to the toxic effect of human body, can also inhibit lipase, sclerotin phosphatase and
The activity of the enzymes such as urease causes metabolism disorder, inhibits endocrine effect, generates not to gonad, adrenal gland and pancreas
Good influence seriously threatens human body physical and mental health.So country has formulated more stringent standard, standard to fluoride waste discharge
Provide industrial enterprise's waste water content of fluoride in 10mg/L hereinafter, drinking water content of fluoride 1.0mg/L or less.
Mainly there are chemical precipitation method, flocculation sedimentation, absorption method etc. to the method for fluoride wastewater treatment at present.It is heavy by chemistry
High-concentration fluorine-containing waste water concentration can be reduced to 30mg/L or so by shallow lake method, then again through flocculation sedimentation or absorption Combined Treatment
Afterwards, its concentration is made to be reduced to 10mg/L or so.But operation is excessively cumbersome, addition chemicals pharmaceutical quantities are very big, the sludge of generation
And secondary pollution is more, and treatment effect is also unstable.
Patent " fluorine-contained wastewater treatment system and method " Patent No. 201610060678.8 of State Patent Office's authorization,
It is characterized by comprising one section to remove fluorine ion device, and chemicals dosing plant, control device, the medicament includes calcium salt, the calcium salt energy
It reacts with the fluorine ion in the fluoride waste to generate calcium fluoride precipitate, the calcium fluoride precipitate is aggregated and is sunk
It lowers to carry out mud-water separation, then the fluoride waste is discharged, shortcoming is that above-mentioned processing generates sludge and two
Secondary pollutant is more, and treatment effect is also unstable.
A kind of patent " fluorine-contained wastewater treatment system " Patent No. 201720296698.5 of State Patent Office's authorization, it is special
Sign is: including absorption tower (1), the lower part of absorption tower (1) is provided with fluoride waste slot (11), the outlet of fluoride waste slot (11)
End is by pipeline and goes out to give pump C(8) it is connect with the input end of storage pool (2), abacus (21) are set in storage pool (2), orifice plate
(21) be provided with below strainer (22), the outlet end of storage pool (2) by pipeline and go out give pump B(7) and reaction tank (3) a left side
The connection of side-entrance end, the right side input end of reaction tank (3) is by pipeline and goes out to give pump A(6) outlet end company with adsorption tank (4)
It connects, the outlet at bottom end of reaction tank (3) is connect by pipeline with sedimentation basin (5), and the two sides of reaction tank (3) are provided with heating device
(9), heating device (9) is provided with computer heating control case (10).Present treatment system is the orifice plate and strainer by being arranged in storage pool,
Solid pollutant is filtered, then its shortcoming is this place by the reactivity of heating device in reaction tank raising mixed liquor
It is big to manage system structure layout area occupied, and mixed liquor mainly uses ingredient for anionic polyacrylamide, it is processed useless
The standard of drinking water is not achieved in water.
Summary of the invention
The task of the present invention is the mass concentrations for proposing a kind of treated fluoride waste remnants fluorine ion can reach country
Defined discharge standard or drinking water standard.
The task of the present invention is what is completed in this way, it is characterised in that: includes the following steps；
Fluoride waste to be processed is injected water distribution area by waste water pump, added in water distribution area by step 1, water distribution according to wastewater treatment capacity
Adding sodium hydroxide solution or sulfuric acid solution adjust waste water pH value, adjust conductivity of waste water in water distribution area addition sodium chloride solution；
Step 2, through step 1 waste water adjusted, by water distribution area lower part water distributing pore even into electrochemical reaction area.It is anti-in electricity
Under the action of the positive and negative pole plate direct current for answering area, metal ion forms various hydroxyl complexings through hydrolysis, polymerization, oxidation and reduction
Object, multinuclear hydroxo complex make fluoride form wadding body in its stable form, according to waste water quality and row down to hydroxide
Standard is put, the electrochemical reaction time is 5-20 min；
Step 3, the waste water after step 2 reaction obtain waste water in rear reaction zone by reaction zone top even into rear reaction zone
Adequately to react, the rear reaction time is 3-10 min；
Step 4, the waste water reacted after step 3 the reaction zone bottom after enter coagulating area.In coagulating area, addition is helped
Solidifying agent PAM strengthens the flocculating effect and rapid precipitation performance of wadding body in waste water, and the coagulating area residence time is 2-3min；
Step 5, the waste water after step 4 coagulating enter settling zone by bottom, and waste water is after precipitating clarification, clarified wastewater
The overflow weir standard discharge being arranged through settling zone top, the sludge being deposited in settling zone bottom pyramidal slot, passes through sludge pipe
Discharge.In step 1, added sodium hydroxide solution or sulfuric acid solution are subject to the fluorine-containing pH value of waste water in 6.5-8.5；It is added
Sodium chloride solution makes the conductivity of waste water between 20000-40000 μ S/cm.In step 2, according to waste water content of fluoride
And discharge standard, the electrode plate high-frequency pulse voltage in electrochemical reaction area are 8~12V；Electrode plate current density is 60-110A/
M2, high frequency pulse power supply duty ratio are 50-80%, and high-frequency electrical pulses source frequency is 2500Hz.In step 4, the hybrid reaction area
Mixed form be that baffling is hybrid, by the mixing of above and below waste water and left and right disengaging, make added flocculation aid and waste water
With the reaction of abundant mixing.In step 4, added flocculation aid is anion PAM, and additive amount is that 0.2%, PAM of wastewater flow rate dilutes
Concentration 0.1%.In steps of 5, settling zone surface loading is 3.0m3/m2.h.
Device in a kind of high-frequency impulse electrochemistry processing fluoride waste method, it is characterised in that: box house partition
Successively by water distribution area, electrochemical reaction area, rear reaction zone, coagulating area, settling zone are separated as independent unit, the electricity
The rear reaction zone that chemical reaction zone is distributed below is connected with the water inlet of the water distribution area of head end by circulation line, the circulation pipe
It is connected with circulating pump among road and constitutes circulation in waste water, the rear reaction zone bottom, which is provided with to be discharged, enters coagulating area, then into
Entering settling zone precipitating, the settling zone top is provided with inclined plate packing, the waste water outflow weir plate that waste water is arranged by settling zone top,
And be discharged by water outlet, the water outlet is arranged in the top of settling zone and is discharged by pipeline, and mud discharging mouth setting is precipitating
Area side, and sludge pipe is connected on mud discharging mouth.The partition uses PE plate, and the water distribution area cabinet, bottom is provided with draining
Slot, and the slot bottom of rhone is uniformly machined with drainage hole, the settling zone bottom is pyramidal structure.The electric flocculation reaction zone case
There are anode plate and cathode plate according to a fixed spacing alternating sequence in vivo, and the wiring of anode plate is drawn by the way that copper bar connection is simultaneously outer
It is connect with high frequency pulse power supply anode, and the wiring of cathode plate is connected by copper bar, and draws connect with high frequency pulse power supply cathode outside
It connects.The spacing of the yin, yang pole plate is 20mm-30mm, the preferential aluminium sheet of yin, yang pole plate, with a thickness of 8mm.
The present invention has the effect that
1, the present invention is the integration apparatus for collecting the technologies such as electrochemical oxidation, reduction, flocculation, and structure is simple, and occupied area is small；
2, the abilities such as redox reaction and flocculation are stronger compared with other methods ability, and operation is controllable, stable effluent quality；
3, operating parameter, flexible operation can be adjusted according to processing waste water water and water quality；
4, it is not required to addition chemical agent, secondary pollution is few；
5, the device is controlled using PLC or controller, high degree of automation, is convenient for operational administrative.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present invention processing waste water fluorine processing unit；Fig. 2 is present invention processing waste water fluorine processing dress
Set sewage treatment flow graph.
Drawing explanation: 1, water distribution area, 2, electrochemical reaction area, 3, rear reaction zone, 4, coagulating area, 5, settling zone, 6,
Inclined plate packing, 7, overflow weir, 8, water inlet pipe, 9, circulating water pipe, 10, outlet pipe, 11, cathode plate, 12, anode plate, 13, circulation
Water pump, 14, sludge pipe, 15, cabinet.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The electrochemical process for treating of fluoride waste is under the action of direct current, and anode generates metal ion, is hydrolyzed, is gathered
It closes, aoxidize and restores, form various hydroxo complexes, multinuclear hydroxo complex down to hydroxide, make the pollutant in electric field
It is combined into solid particle in its stable form with ionization product, the precipitation and separation from waste water.The electrochemical reaction has simultaneously
The characteristics of oxidation, reduction, ion exchange, absorption and complexing flocculation.
The device of processing fluoride waste includes cabinet, with partition successively by water distribution area 1, electrochemical reaction area inside cabinet 15
2, rear reaction zone 3, coagulating area 4, settling zone 5 are separated as independent unit, and the partition uses PE plate, the electrochemistry
The water inlet 8 of the water distribution area 1 of rear reaction zone 3 and head end that reaction zone 2 is distributed below is connected by circulation line 9, the circulation
It is connected with circulating pump 13 among pipeline and constitutes circulation in waste water, the purpose is to improve the water velocity of reaction zone, improves mixability,
Strengthen reaction efficiency, reduces energy consumption.The rear reaction zone bottom is provided with apopore and enters coagulating area 4, enters back into
Settling zone 5 precipitates, and the settling zone top is provided with inclined plate packing 6, the waste water outflow weir plate that waste water is arranged by settling zone top
7, and be discharged by water outlet, the water outlet 10 is arranged in the top of settling zone and is discharged by pipeline, and mud discharging mouth setting exists
Settling zone side, and sludge pipe 14 is connected on mud discharging mouth.
The water distribution area cabinet, bottom is provided with rhone, and the slot bottom of rhone is uniformly machined with drainage hole.
There are anode plate 11 and cathode plate 12 according to a fixed spacing alternating sequence in the electric flocculation reaction zone cabinet, and
The wiring of anode plate is connect by drawing outside copper bar connection simultaneously with high frequency pulse power supply anode, and the wiring of cathode plate passes through copper bar and connects
It connects, and draws connect with high frequency pulse power supply cathode outside, the spacing of the yin, yang pole plate is 20mm-30mm, the yin, yang pole plate
Preferential aluminium sheet, with a thickness of 8mm.
5 bottom of settling zone is pyramidal structure, the inclined plate packing of top setting, it is therefore an objective to increase waste water filtering face
Product reduces settling zone area, enhances sedimentation effect.
According to wastewater treatment capacity, waste water content of fluoride and discharge standard, the residence time in electric flocculation reaction zone is designed
Residence time for 5-20min, rear reaction zone is designed according to 1/2 time in electrochemical reaction area.
The DC power supply that the technical program uses to reduce concentration polarization, reduces power consumption, increases for high-frequency impulse regulated power supply
It adds some points the service life hit, and high-frequency impulse regulated power supply frequency is 2000-3000Hz, and high-frequency impulse regulated power supply duty ratio
It is continuously adjustable for 100%, and have automatic reverse function.
Fluorine-containing waste water processing apparatus, waste water initially enter water distribution area, and water distribution area is equal by the apopore of bottom processing in slot
Weighing apparatus enters electrochemical reaction area 2, and under the action of pole plate direct current, metal ion is hydrolyzed fluoride waste, polymerization, aoxidizes and goes back
Original forms various hydroxo complexes, multicore hydroxyl conjunction object down to hydroxide, fluoride is made to form wadding in its stable form
Body, according to waste water quality discharge standard, reaction time of the fluoride waste in electrochemical reaction area is 5-20min, containing after reaction
Fluorine waste water enters rear reaction zone by electrochemical reaction area top, so that fluoride waste is adequately reacted in rear reaction zone, rear anti-
The reaction time for answering area is 3-10min, and the fluoride waste of rear reaction zone enters coagulating area by rear reaction zone bottom, and to mixed
Solidifying reaction zone adds flocculation aid PAM, it is therefore an objective to strengthen the flocculating effect of wadding body and rapid precipitation performance, coagulating area in waste water
Residence time is 2-3min.Fluoride waste enters settling zone by coagulating area bottom, after settling zone precipitating clarification, by precipitating
The overflow weir of area top setting reaches discharge standard, is discharged by discharge outlet by pipeline, the sludge of precipitating passes through mud discharging mouth
Discharge.
Wherein, pass through piping connection between rear reaction zone and water distribution area, the circulating pump connected between pipeline, waste water is by rear anti-
It answers the water outlet in area by pipeline, the waste water after reaction is entered into water distribution area by water inlet by circulating pump and carries out reaction again
Reason, to realize circulation in reaction, the purpose is to opposite raising waste water in the water velocity of reaction zone, improve waste water and mix journey
Degree strengthens reaction efficiency, reduces energy consumption, and circulating pump inner recirculation flow amount is 1-3 times for the treatment of capacity.
Using high-frequency impulse electrochemistry handle fluoride waste method the following steps are included:
Step 1;Fluoride waste to be processed is injected water distribution area by waste water pump, added in water distribution area by water distribution according to wastewater treatment capacity
Adding sodium hydroxide solution or sulfuric acid solution adjust waste water pH value, adjust conductivity of waste water in water distribution area addition sodium chloride solution.
Step 2, through step 1 waste water adjusted, by water distribution area lower part water distributing pore even into electrochemical reaction area.In electricity
Under the action of the positive and negative pole plate direct current for learning reaction zone, metal ion forms various hydroxyls through hydrolysis, polymerization, oxidation and reduction
Complex compound, multinuclear hydroxo complex make fluoride form wadding body in its stable form, according to waste water quality down to hydroxide
And discharge standard, electrochemical reaction time are 5-20 min；
Step 3, the waste water after step 2 reaction obtain waste water in rear reaction zone by reaction zone top even into rear reaction zone
Adequately to react, the rear reaction time is 3-10 min；
Step 4, the waste water reacted after step 3 the reaction zone bottom after enter coagulating area.In coagulating area, addition is helped
Solidifying agent PAM strengthens the flocculating effect and rapid precipitation performance of wadding body in waste water, and the coagulating area residence time is 2-3min；
Step 5, the waste water after step 4 coagulating enter settling zone by bottom, and waste water is after precipitating clarification, clarified wastewater
The overflow weir standard discharge being arranged through settling zone top, the sludge being deposited in settling zone bottom pyramidal slot, passes through sludge pipe
Discharge.
In step 1, added sodium hydroxide solution or sulfuric acid solution make waste water pH value between 6.5-8.5；It is added
Sodium chloride solution makes the conductivity of waste water between 20000-40000 μ S/cm.
In step 2, according to waste water content of fluoride and discharge standard, the electrode plate high-frequency electrical pulses in electrochemical reaction area
Pressure is 8~12V；Electrode plate current density is 60-110A/m2, and high frequency pulse power supply duty ratio is 50-80%, high frequency pulse power supply
Frequency is 2500Hz.
In step 4, the mixed form in the hybrid reaction area is that baffling is hybrid, is passed in and out by above and below waste water and left and right
Mixing, make reacting with abundant mixing for added flocculation aid and waste water.
In step 4, added flocculation aid is anion PAM, and additive amount is 0.2%, the PAM diluted concentration of wastewater flow rate
0.1%。
In steps of 5, settling zone surface loading is 2.0-3.0m3/m2.h.
Embodiment 1
The electrochemical reaction time is 5min in step 2, and rear reaction time 20min, added sodium hydroxide solution or sulfuric acid are molten
Liquid is subject to the fluorine-containing pH value of waste water 6.5；Added sodium chloride solution makes the conductivity of waste water in 20000 μ S/cm.
In step 2, according to waste water content of fluoride and discharge standard, the electrode plate high-frequency electrical pulses in electrochemical reaction area
Pressure is 8V；Electrode plate current density is 60A/m2, and high frequency pulse power supply duty ratio is 50%, and high-frequency electrical pulses source frequency is
2500Hz。
In step 4, the mixed form in the hybrid reaction area is that baffling is hybrid, is passed in and out by above and below waste water and left and right
Mixing, make reacting with abundant mixing for added flocculation aid and waste water, coagulating area residence time 2min.
In step 4, added flocculation aid is anion PAM, and additive amount is 0.2%, the PAM diluted concentration of wastewater flow rate
0.1%。
In steps of 5, settling zone surface loading is 3.0m3/m2.h.
Embodiment 2
The electrochemical reaction time is 10min in step 2, and the rear reaction time is 5min, in step 1, added sodium hydroxide
Solution or sulfuric acid solution are with the fluorine-containing pH value of waste water 7.5；Added sodium chloride solution makes the conductivity of waste water in 30000 μ S/
cm。
In step 2, according to waste water content of fluoride and discharge standard, the electrode plate high-frequency electrical pulses in electrochemical reaction area
Pressure is 10V；Electrode plate current density is 80A/m2, and high frequency pulse power supply duty ratio is 60%, and high-frequency electrical pulses source frequency is
2500Hz。
In step 4, the mixed form in the hybrid reaction area is that baffling is hybrid, is passed in and out by above and below waste water and left and right
Mixing, make reacting with abundant mixing for added flocculation aid and waste water, coagulating area residence time 2.5mi.
In step 4, added flocculation aid is anion PAM, and additive amount is 0.2%, the PAM diluted concentration of wastewater flow rate
0.1%。
In steps of 5, settling zone surface loading is 2.5m3/m2.h.
Embodiment 3
The electrochemical reaction time is 20min in step 2, and rear reaction time 10min, in step 1, added sodium hydroxide is molten
Liquid or sulfuric acid solution are with the fluorine-containing pH value of waste water 8.5；Added sodium chloride solution makes the conductivity of waste water in 40000 μ S/cm.
In step 2, according to waste water content of fluoride and discharge standard, the electrode plate high-frequency electrical pulses in electrochemical reaction area
Pressure is 12V；Electrode plate current density is 110A/m2, and high frequency pulse power supply duty ratio is 80%, and high-frequency electrical pulses source frequency is
2500Hz。
In step 4, the mixed form in the hybrid reaction area is that baffling is hybrid, is passed in and out by above and below waste water and left and right
Mixing, make reacting with abundant mixing for added flocculation aid and waste water, coagulating area residence time 3min.
In step 4, added flocculation aid is anion PAM, and additive amount is 0.2%, the PAM diluted concentration of wastewater flow rate
0.1%。
In steps of 5, settling zone surface loading is 3.0m3/m2.h.
The present invention integrates electrochemical oxidation reactions, reduction reaction, ion exchange and flocculation sedimentation technology, thus
Realize to the advanced treating of fluoride waste, effluent quality reach industrial enterprise's content of fluoride of country's formulation 10mg/L with
Under, drinking water content of fluoride 1.0mg/L standard requirements below.
In the present invention unless specifically defined or limited otherwise, the arts such as term " installation ", " connected ", " connection ", " fixation "
Language shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or integrally connected, can be two members
Connection inside part.For those skilled in the art, above-mentioned term can be understood of the invention as the case may be
Concrete meaning.
Claims (10)
1. high-frequency impulse electrochemistry handles fluoride waste method and device thereof, it is characterised in that: include the following steps；
Fluoride waste to be processed is injected water distribution area by waste water pump, added in water distribution area by step 1, water distribution according to wastewater treatment capacity
Adding sodium hydroxide solution or sulfuric acid solution adjust waste water pH value, adjust conductivity of waste water in water distribution area addition sodium chloride solution；
Step 2, through step 1 waste water adjusted, by water distribution area lower part water distributing pore even into electrochemical reaction area；It is anti-in electricity
Under the action of the positive and negative pole plate direct current for answering area, metal ion forms various hydroxyl complexings through hydrolysis, polymerization, oxidation and reduction
Object, multinuclear hydroxo complex make fluoride form wadding body in its stable form, according to waste water quality and row down to hydroxide
Standard is put, the electrochemical reaction time is 5-20 min；
Step 3, the waste water after step 2 reaction obtain waste water in rear reaction zone by reaction zone top even into rear reaction zone
Adequately to react, the rear reaction time is 3-10 min；
Step 4, the waste water reacted after step 3 the reaction zone bottom after enter coagulating area；
Flocculation aid PAM is added in coagulating area, strengthens the flocculating effect and rapid precipitation performance of wadding body in waste water, coagulating
Area's residence time is 2-3min；
Step 5, the waste water after step 4 coagulating enter settling zone by bottom, and waste water is after precipitating clarification, clarified wastewater
The overflow weir standard discharge being arranged through settling zone top, the sludge being deposited in settling zone bottom pyramidal slot, passes through sludge pipe
Discharge.
2. high-frequency impulse electrochemistry according to claim 1 handles fluoride waste method and device thereof, it is characterised in that:
In step 1, added sodium hydroxide solution or sulfuric acid solution are subject to the fluorine-containing pH value of waste water in 6.5-8.5；Added sodium chloride
Solution makes the conductivity of waste water between 20000-40000 μ S/cm.
3. high-frequency impulse electrochemistry according to claim 1 handles fluoride waste method and device thereof, it is characterised in that:
In step 2, according to waste water content of fluoride and discharge standard, the electrode plate high-frequency pulse voltage in electrochemical reaction area is 8~
12V；Electrode plate current density is 60-110A/m2, and high frequency pulse power supply duty ratio is 50-80%, and high-frequency electrical pulses source frequency is
2500Hz。
4. high-frequency impulse electrochemistry according to claim 1 handles fluoride waste method and device thereof, it is characterised in that:
In step 4, the mixed form in the hybrid reaction area is that baffling is hybrid, by the mixing of above and below waste water and left and right disengaging, is made
Added flocculation aid is reacted with waste water with abundant mixing.
5. high-frequency impulse electrochemistry according to claim 1 handles fluoride waste method and device thereof, it is characterised in that:
In step 4, added flocculation aid is anion PAM, and additive amount is 0.2%, the PAM diluted concentration 0.1% of wastewater flow rate.
6. high-frequency impulse electrochemistry according to claim 1 handles fluoride waste method and device thereof, it is characterised in that:
In step 5, settling zone surface loading is 3.0m3/m2.h.
7. a kind of device of high-frequency impulse electrochemistry processing fluoride waste, it is characterised in that: box house is with partition successively by cloth
Pool, electrochemical reaction area, rear reaction zone, coagulating area, settling zone are separated as independent unit, the electrochemical reaction
The rear reaction zone that area is distributed below is connected with the water inlet of the water distribution area of head end by circulation line, is connected among the circulation line
There is circulating pump to constitute circulation in waste water, the rear reaction zone bottom is provided with water outlet and enters coagulating area, enters back into settling zone
Precipitating, the settling zone top is provided with inclined plate packing, the waste water outflow weir plate that waste water is arranged by settling zone top, and passes through and
Mouth of a river discharge, the water outlet are arranged in the top of settling zone and are discharged by pipeline, and mud discharging mouth is arranged in settling zone side, and
Sludge pipe is connected on mud discharging mouth.
8. the device of high-frequency impulse electrochemistry processing fluoride waste according to claim 7, it is characterised in that: the partition
Using PE plate, the water distribution area cabinet, bottom is provided with rhone, and the slot bottom of rhone is uniformly machined with drainage hole, described
Settling zone bottom is pyramidal structure.
9. the device of high-frequency impulse electrochemistry processing fluoride waste according to claim 7, it is characterised in that: the electricity wadding
There are anode plate and cathode plate according to a fixed spacing alternating sequence in solidifying reaction zone cabinet, and the wiring of anode plate passes through copper bar
Connect and it is outer draw connect with high frequency pulse power supply anode, and the wiring of cathode plate is by copper bar connection, and draws outside and high-frequency impulse
Power cathode connection.
10. the device of high-frequency impulse electrochemistry processing fluoride waste according to claim 7, it is characterised in that: the yin,
The spacing of anode plate is 20mm-30mm, the preferential aluminium sheet of yin, yang pole plate, with a thickness of 8mm.
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| CN113501571A (en) * | 2021-07-15 | 2021-10-15 | 曲靖云铝淯鑫铝业有限公司 | Electrolytic aluminum trade electric flocculation defluorination compartment type continuous sedimentation system |
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