CN108892288A - A kind of oil field waste liquid electro-catalysis high-efficient decolorizing method and device - Google Patents
A kind of oil field waste liquid electro-catalysis high-efficient decolorizing method and device Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/46109—Electrodes
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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
- C02F1/467—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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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F1/46104—Devices therefor; Their operating or servicing
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- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4612—Controlling or monitoring
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- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
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- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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- C—CHEMISTRY; METALLURGY
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- C02F2301/00—General aspects of water treatment
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- C02F7/00—Aeration of stretches of water
Abstract
The present invention provides a kind of oil field waste liquid electro-catalysis high-efficient decolorizing method and devices.The method of the oil field waste liquid electro-catalysis efficient decolorizing includes：Oil field waste liquid is subjected to acidification Air Exposure；The oil field waste liquid of acidified Air Exposure carries out electrocatalytic oxidation processing；After electrocatalytic oxidation processing, carries out delay and stop stirring sedimentation, complete the efficient decolorizing of oil field waste liquid.The present invention utilizes acidification aeration pre-oxidation-electrocatalytic oxidation-delay reaction sedimentation group technology, the chemical agent being effectively reduced in fracturing wastewater treatment process adds, sludge yield is down to 20% or less conventional chemical mixes flocculation process, chroma removal rate is stablized 85% or more, and integrated treatment cost reduces by 20% or more.
Description
Technical field
The invention belongs to industrial waste water treatment, it is related to a kind of oil field waste liquid electro-catalysis high-efficient decolorizing method and dress
It sets.
Background technique
Oil field operation waste liquid type is more, contains a considerable amount of petroleum-types, suspended particulate, inorganic salts, heavy metal ion
And soluble small organic molecule and high molecular polymer, it is that a kind of coloration is high, salinity is high, bio-refractory high pollution is negative
Lotus sewage, compared with conventional produced water, the processing difficulty of fracturing wastewater is larger.If such sewage directly outlet will be to surrounding enviroment
Generation seriously affects；Direct re-injection can block water filling layer soil duct, reduce oil reservoir water absorption rate.
Existing fracturing wastewater processing technique may include：Coagulation (flocculation), catalytic oxidation, dissolved air flotation, biological treatment etc.
Process combination.Oil field at home enterprise generallys use the materializing strategy technique based on mixed flocculation process, need to add a large amount of chemical drugs
Agent, sludge yield is big, and color removal low efficiency, and effluent color dilution is up to 400~700 degree, causes multi-purpose station effluent color dilution super
The problems such as mark.
For the decoloration problem of high chroma sewage, some investigators use Fenton oxidation, photochemical catalytic oxidation, hypochlorous acid
The chemical oxidation process such as sodium oxidation, but it is high, hazardous to there is big added amount of chemical, operating condition requirement harshness, processing cost
The problems such as product dosage is big, it is limited in oilfield enterprise's application.
Summary of the invention
For oilfield enterprise's high stable, high chroma fracturing wastewater processing technique problem, the purpose of the present invention is to provide one
Kind fracturing wastewater electro-catalysis high-efficient decolorizing method and device.The features such as fracturing wastewater stable system, COD high, using acidification
The pretreatment mode of aeration realizes that fracturing wastewater pre-oxidation is de- steady, recycles specially designed electrocatalytic oxidation technique, couples
Hypochlorous acid oxidization effect, realizes the de- steady decolorization of high stable, high chroma fracturing wastewater.
The purpose of the present invention is achieved by the following technical programs：
On the one hand, the present invention provides a kind of method of oil field waste liquid electro-catalysis efficient decolorizing comprising following steps：
Oil field waste liquid is subjected to acidification Air Exposure；
The oil field waste liquid of acidified Air Exposure carries out electrocatalytic oxidation processing；
After electrocatalytic oxidation processing, carries out delay and stop stirring sedimentation, complete the efficient decolorizing of oil field waste liquid.
In above-mentioned method, it is preferable that being acidified Air Exposure step is：Use sulfuric acid adjust oil field waste liquid pH value for
3.4-3.6, and it is aerated 0.5-1h.
In above-mentioned method, it is preferable that the anode electrode that electrocatalytic oxidation processing uses is there are many metal oxides to apply
Cover the TiO of sintering processes2/PdO2Electrode.
In above-mentioned method, it is preferable that Multimetal oxide includes more in the metal oxide of Fe, Ni, Co and Cu
Kind combination.
In above-mentioned method, it is preferable that the TiO of Multimetal oxide coating sintering processing2/PdO2The preparation side of electrode
Method is：
Poly-metal deoxide mixing material is taken, wherein the molar ratio of the oxide of Fe, Ni, Co and Cu is (0-0.5)：
(0-0.5)：(0.01-0.3)：(0.2-0.5)；TiO is carried out in rotation container2/PdO2The coating of carrier will coat first
Poly-metal deoxide mixing material powder wetting, be then air-dried, and be coated to TiO2/PdO2On, coating thickness
It is 150-250 microns, after coating, sample is put into microwave agglomerating furnace and is sintered, sintering temperature is 1000-1500 DEG C, when sintering
Between be 60-80min.
In above-mentioned method, it is preferable that electrocatalytic oxidation processing uses pulsed power supplies, and current density control is 7-
12mA/cm2, the control of pulse power frequency is 2750-4000Hz, and the electrocatalytic reaction time is 30min.
In above-mentioned method, it is preferable that the residence time carried out when delay stops stirring sedimentation is 0.5-1.0h, and stirring is strong
Degree is 30-45rpm.
In above-mentioned method, it is preferable that further include to the oil field waste liquid after decoloration after carrying out delay and stopping stirring sedimentation
It is further settled by inclined plate sedimentation pond and the step of by adsorbent material further adsorption treatment.
In above-mentioned method, it is preferable that the adsorbent material includes walnut shell and/or peanut shell.
On the other hand, the present invention also provides a kind of device of oil field waste liquid electro-catalysis efficient decolorizing, which includes：
It is acidified aeration unit, for fracturing wastewater to be carried out acidification Air Exposure；
Electrocatalytic oxidation unit, for the oil field waste liquid of acidified Air Exposure to be carried out electrocatalytic oxidation processing；
Delay reaction sedimentation unit, treated for will pass through electrocatalytic oxidation, and oil field waste liquid carries out delay stops stirring
The efficient decolorizing of oil field waste liquid is completed in sedimentation.
In above-mentioned device, it is preferable that the device further includes inclined plate sedimentation unit, heavy for that will stop stirring by delay
Oil field waste liquid after drop further settles.
In above-mentioned device, it is preferable that the device further includes filtering absorbing unit, and being used for will be at inclined plate sedimentation unit sedimentation
Oil field waste liquid after reason further filters absorption.
In above-mentioned device, it is preferable that the device further includes pH on-line monitoring unit, conductivity on-line monitoring unit and liquid
Position on-line monitoring unit；For monitoring pH value, conductivity and liquid level during electrocatalytic reaction respectively.
In the present invention, acidification aeration unit can selected from acidification aeration tank, as the pre-treating technology of electrocatalytic oxidation,
Use H2SO4Adjusting fracturing wastewater pH value is that 3.4-3.6 carries out taking off steady decolorization using electrocatalytic oxidation after being aerated 1h.Test
The result shows that 24%-33% can be improved in subsequent electrocatalytic oxidation unit decolorizing efficiency after using acidification aeration pretreatment.In acid
Change in aeration process, on the one hand can be adjusted by pH and change particle surface charge state, promotes fine particle aggregation, sedimentation,
On the other hand pre-oxidation effect is generated, further reduced the stability of system, is created favorable conditions for subsequent electro-catalysis process.
In the present invention, electrocatalytic oxidation unit can choose electrocatalysis oxidation reaction device.The electrocatalysis oxidation reaction device is adopted
With the TiO of Multimetal oxide (metal oxide of Fe, Ni, Co and Cu etc.) coating2/PdO2Electrode, should as anode electrode
Anode electrode is the material of high oxygen separated overpotential, utilizes the strong oxygen such as all kinds of free radicals of OH and association generated under electric field action
The property changed active matter, targets the colour developing group of degradation of contaminant, and macromolecular, long-chain organic pollutant are broken ring chain rupture and are oxidized to small point
Sub- organic pollutant reaches decoloration purpose；Meanwhile using the high chloride content feature of fracturing wastewater, by rationally controlling electric current
Density is 7-12mA/cm2, hypochlorite (ClO is generated in anode surface-), using hypochlorite under the conditions of pH=3.5-4.0
Strong oxdiative and decolorization, further increase the decolorizing efficiency to high chroma fracturing wastewater, after electrocatalytic reaction 15-30min,
Effluent color dilution is down to 50-75 times by 800-900 times intake, and shows broken to pollutant colour developing functional group in electrocatalytic oxidation process
Bad effect is significant, while sewage viscosity is also greatly reduced, and fracturing wastewater realizes efficiently de- steady decoloration.
In the present invention, the step of sedimentation unit is the residence time designed in electrocatalytic oxidation unit is reacted in delay, in electricity
After catalysis reaction, the substance that some chlorine residue, hydrogen peroxide etc. have oxidation characteristic is often remained in water, is aoxidized during delay reaction
Reaction continues slowly to carry out, and reduces effluent color dilution, further can carry out oxygenolysis to Organic substance in water.
It further include further settle inhaling after carrying out delay and stopping stirring sedimentation further in the present invention
Attached, the inclined plate sedimentation unit used can be inclined plate sedimentation pond, and filtering absorbing unit is the adsorbent materials such as walnut shell, peanut shell.
The method and device of oil field waste liquid electro-catalysis efficient decolorizing of the invention has the following advantages that：
(1) using air aeration oxidation under acid condition, change surface particles charge condition in water, and utilize exposure
Stirring during gas and the inswept journey of volume promote the collision of fine particle and glutinous connection in water, realize stabilising system pre-oxidation and
It is de- steady, advantage is provided for electrochemical oxidation；
(2) it for the decoloration demand of high chroma pollutant in fracturing wastewater, selects at Multimetal oxide coating sintering
The TiO of reason2/PdO2Anode of the electrode as electrocatalytic oxidation technique can efficiently generate OH and all kinds of free radical Strong oxdiatives of association
Active matter, the colour developing group of orientation removal pollutant, and synchronous realization long-chain, labyrinth pollutant chain rupture, it is useless to reach operation
De- steady, decoloration the purpose of liquid；
(3) during electrocatalytic oxidation, the technological parameters such as response voltage and current density are conducive to anode surface generation
Strong oxdiative and decolorization of the hypochlorite under the conditions of pH=3.5-4.0, further decrease fracturing wastewater coloration；
(4) delay reaction sedimenting system is set in electrocatalytic oxidation unit rear end, utilizes oxidisability object remaining in system
Matter continues to degrade to water pollutant, further decreases effluent color dilution.
(5) using acidification aeration pre-oxidation-electrocatalytic oxidation-delay reaction sedimentation group technology, operation is effectively reduced
Chemical agent in waste treatment process adds, sludge yield be down to conventional chemical mix flocculation process 20% hereinafter, coloration
Removal rate is stablized 85% or more, and integrated treatment cost reduces by 20% or more.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural framing figure of the device of oil field waste liquid electro-catalysis efficient decolorizing in the embodiment of the present invention.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now to skill of the invention
Art scheme carries out described further below, but should not be understood as that limiting the scope of the invention.
The present embodiment provides a kind of methods of oil field waste liquid electro-catalysis efficient decolorizing, include the following steps：
Fracturing wastewater is carried out acidification Air Exposure by step 1：
Process object is certain oil field operation waste liquid, treatment scale 1.5m3/ h, the pH value of the oil field waste liquid be 6.9-7.5,
COD is 2800-3450mg/L, and the pH value for using sulfuric acid to adjust oil field waste liquid is aerated 0.5h after acidification for 3.4-3.6.
The oil field waste liquid of step 2, acidified Air Exposure carries out electrocatalytic oxidation processing：
The anode electrode that electrocatalytic oxidation processing uses is the metal oxide-coated sintering processes of Fe, Ni, Co and Cu
TiO2/PdO2Electrode；Electrocatalytic oxidation processing uses pulsed power supplies, and current density control is 8.1-8.5mA/cm2, pulse electricity
Source frequency control is 2750-3000Hz, and the electrocatalytic reaction time is 30min.
Wherein, the TiO of Multimetal oxide coating sintering processing2/PdO2The preparation method of electrode is：
Polymetal oxide materials are taken, wherein the molar ratio of the oxide of Fe, Ni, Co and Cu is (0-0.5)：(0-
0.5)：(0.01-0.3)：(0.2-0.5).TiO is carried out in rotation container2/PdO2The coating of carrier, what will be coated first is more
The powder of metal oxide materials soaks, and then using being air-dried, is coated to TiO2/PdO2On, coating thickness 150-250
Micron, after coating, sample is put into microwave agglomerating furnace and is sintered, and sintering temperature is 1000-1500 DEG C, sintering time 60-
80min。
Step 3 after electrocatalytic oxidation processing, carries out delay and stops stirring sedimentation, residence time 0.75h, stirring intensity
For 30-45rpm, to complete the efficient decolorizing of oil field waste liquid, up to 65% or more, chroma removal rate is stablized to be kept COD removal rate
80% or more.
It in one preferred embodiment, further include to the oil field after decoloration after carrying out delay and stopping stirring sedimentation
Waste liquid is further settled by inclined plate sedimentation pond and by the step of the further adsorption treatments of adsorbent materials such as walnut shell, peanut shell
Suddenly.After this step, COD removal rate is up to 70% or more, and chroma removal rate is up to 85% or more.
Based on the same inventive concept, a kind of dress of oil field waste liquid electro-catalysis efficient decolorizing is additionally provided in the embodiment of the present invention
It sets, as described in the following examples.The principle solved the problems, such as due to the device of oil field waste liquid electro-catalysis efficient decolorizing and oil field are useless
The method of liquid electro-catalysis efficient decolorizing is similar, therefore the implementation of the device of oil field waste liquid electro-catalysis efficient decolorizing may refer to oil field
The implementation of the method for waste liquid electro-catalysis efficient decolorizing, overlaps will not be repeated.It is used below, term " unit " or
The combination of the software and/or hardware of predetermined function may be implemented in " module ".Although device is preferably described in following embodiment
It is realized with software, but the realization of the combination of hardware or software and hardware is also that may and be contemplated.Fig. 1 is this hair
A kind of structural block diagram of the device of the oil field waste liquid electro-catalysis efficient decolorizing of bright embodiment, as shown in Figure 1, may include：Acidification
Aeration unit 101, electrocatalytic oxidation unit 102 and delay reaction sedimentation unit 103, are below illustrated the structure.
It is acidified aeration unit 101, can be used for fracturing wastewater carrying out acidification Air Exposure；
Electrocatalytic oxidation unit 102 can be used for the oil field waste liquid of acidified Air Exposure carrying out electrocatalytic oxidation
Processing；
Delay reaction sedimentation unit 103, can be used for will by electrocatalytic oxidation treated that oil field waste liquid is delayed
Stirring sedimentation is stopped, the efficient decolorizing of oil field waste liquid is completed.
In one preferred embodiment, acidification aeration unit 101 can be used as electro-catalysis selected from acidification aeration tank
The pre-treating technology of oxidation, uses H2SO4Adjusting fracturing wastewater pH value is that 3.4-3.6 is carried out after being aerated 1h using electrocatalytic oxidation
Take off steady decolorization.Test result shows that subsequent electrocatalytic oxidation unit decolorizing efficiency can mention using after acidification aeration pretreatment
High 24%-33%.In acidification aeration process, it on the one hand can be adjusted by pH and change particle surface charge state, promoted thin
On the other hand little particle aggregation, sedimentation generate pre-oxidation effect, further reduced the stability of system, be subsequent electro-catalysis
Process creates favorable conditions.
In one preferred embodiment, electrocatalytic oxidation unit 102 can choose electrocatalysis oxidation reaction device.The electricity
Catalyst oxidation reactor uses the TiO of Multimetal oxide (metal oxide of Fe, Ni, Co and Cu etc.) coating2/PdO2Electricity
Pole is the material of high oxygen separated overpotential as anode electrode, the anode electrode, utilizes the OH and association generated under electric field action
The strong oxidizing properties active matter such as all kinds of free radicals, the colour developing group of degradation of contaminant is targeted, by macromolecular, long-chain organic pollutant
Broken ring chain rupture is oxidized to small molecule organic pollutant, reaches decoloration purpose；Meanwhile utilizing the high chloride content of fracturing wastewater spy
Sign is 7-12mA/cm by rationally controlling current density2, hypochlorite (ClO is generated in anode surface-), utilize hypochlorite
Strong oxdiative and decolorization under the conditions of pH=3.5-4.0 further increase the decolorizing efficiency to high chroma fracturing wastewater, electricity
After catalysis reaction 15-30min, effluent color dilution is down to 50-75 times by 800-900 times intake, and shows in electrocatalytic oxidation process
It is significant to pollutant colour developing functional group's destruction, while sewage viscosity is also greatly reduced, fracturing wastewater is realized efficiently de- steady de-
Color.
In one preferred embodiment, delay reaction sedimentation unit 103 is to design in electrocatalytic oxidation unit 102
The step of residence time, often remains the object that some chlorine residue, hydrogen peroxide etc. have oxidation characteristic after electrocatalytic reaction, in water
Matter, oxidation reaction continues slowly to carry out during delay reaction, reduces effluent color dilution, can further aoxidize to Organic substance in water
It decomposes.
In one preferred embodiment, the device of the oil field waste liquid electro-catalysis efficient decolorizing further includes inclined plate sedimentation list
Member 104 and filtering absorbing unit 105.Inclined plate sedimentation unit 104 is for will stop the oil field waste liquid after stirring settles by delay
Further sedimentation；Filtering absorbing unit 105 is used to the oil field waste liquid after inclined plate sedimentation unit settlement treatment further filtering suction
It is attached.
In one preferred embodiment, inclined plate sedimentation unit 104 can be inclined plate sedimentation pond, filter absorbing unit
105 be the adsorbent materials such as walnut shell, peanut shell.
In one preferred embodiment, the device of the oil field waste liquid electro-catalysis efficient decolorizing further includes pH on-line monitoring
Unit, conductivity on-line monitoring unit and liquid level monitor unit on-line；For monitor respectively pH value during electrocatalytic reaction,
Conductivity and liquid level.
It can be seen from the above description that the embodiment of the present invention realizes following technical effect：
(1) using air aeration oxidation under acid condition, change surface particles charge condition in water, and utilize exposure
Stirring during gas and the inswept journey of volume promote the collision of fine particle and glutinous connection in water, realize stabilising system pre-oxidation and
It is de- steady, advantage is provided for electrochemical oxidation；
(2) it for the decoloration demand of high chroma pollutant in fracturing wastewater, selects at Multimetal oxide coating sintering
The TiO of reason2/PdO2Anode of the electrode as electrocatalytic oxidation technique can efficiently generate OH and all kinds of free radical Strong oxdiatives of association
Active matter, the colour developing group of orientation removal pollutant, and synchronous realization long-chain, labyrinth pollutant chain rupture, it is useless to reach operation
De- steady, decoloration the purpose of liquid；
(3) during electrocatalytic oxidation, the technological parameters such as response voltage and current density are conducive to anode surface generation
Strong oxdiative and decolorization of the hypochlorite under the conditions of pH=3.5-4.0, further decrease fracturing wastewater coloration；
(4) delay reaction sedimenting system is set in electrocatalytic oxidation unit rear end, utilizes oxidisability object remaining in system
Matter continues to degrade to water pollutant, further decreases effluent color dilution.
(5) using acidification aeration pre-oxidation-electrocatalytic oxidation-delay reaction sedimentation group technology, operation is effectively reduced
Chemical agent in waste treatment process adds, sludge yield be down to conventional chemical mix flocculation process 20% hereinafter, coloration
Removal rate is stablized 85% or more, and integrated treatment cost reduces by 20% or more.
The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；Although referring to aforementioned each reality
Applying example, invention is explained in detail, those skilled in the art should understand that：It still can be to aforementioned reality
It applies technical solution documented by example to modify, or some or all of the technical features is replaced on an equal basis；And this
It modifies or replaces, so that corresponding technical solution is departed from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. a kind of method of oil field waste liquid electro-catalysis efficient decolorizing comprising following steps：
Oil field waste liquid is subjected to acidification Air Exposure；
The oil field waste liquid of acidified Air Exposure carries out electrocatalytic oxidation processing；
After electrocatalytic oxidation processing, carries out delay and stop stirring sedimentation, complete the efficient decolorizing of oil field waste liquid.
2. the method according to claim 1, wherein acidification Air Exposure step is：Oil field is adjusted using sulfuric acid
The pH value of waste liquid is 3.4-3.6, and is aerated 0.5-1h.
3. the method according to claim 1, wherein the anode electrode that electrocatalytic oxidation processing uses is for there are many
The TiO of metal oxide-coated sintering processes2/PdO2Electrode；
Preferably, Multimetal oxide includes the multiple combinations in the metal oxide of Fe, Ni, Co and Cu.
4. according to the method described in claim 3, it is characterized in that, the TiO of Multimetal oxide coating sintering processing2/PdO2
The preparation method of electrode is：
Poly-metal deoxide mixing material is taken, wherein the molar ratio of the oxide of Fe, Ni, Co and Cu is (0-0.5)：(0-
0.5)：(0.01-0.3)：(0.2-0.5)；TiO is carried out in rotation container2/PdO2The coating of carrier, what will be coated first is more
The powder of metal oxide mixing material soaks, and is then air-dried, and be coated to TiO2/PdO2On, coating thickness is
150-250 microns, after coating, sample is put into microwave agglomerating furnace and is sintered, sintering temperature is 1000-1500 DEG C, sintering time
For 60-80min.
5. method described according to claim 1 or 3 or 4, it is characterised in that：Electrocatalytic oxidation processing uses pulsed power supplies,
Current density control is 7-12mA/cm2, the control of pulse power frequency is 2750-4000Hz, and the electrocatalytic reaction time is 15-
30min。
6. the method according to claim 1, wherein residence time when carrying out delay stop stirring sedimentation is
0.5-1.0h, stirring intensity 30-45rpm.
7. the method according to claim 1, wherein further including to de- after carrying out delay and stopping stirring sedimentation
The step of oil field waste liquid after color further settle by inclined plate sedimentation pond and passes through adsorbent material further adsorption treatment；
Preferably, the adsorbent material includes walnut shell and/or peanut shell.
8. a kind of device of oil field waste liquid electro-catalysis efficient decolorizing, which is characterized in that the device includes：
It is acidified aeration unit, for fracturing wastewater to be carried out acidification Air Exposure；
Electrocatalytic oxidation unit, for the oil field waste liquid of acidified Air Exposure to be carried out electrocatalytic oxidation processing；
Delay reaction sedimentation unit, treated for will pass through electrocatalytic oxidation, and oil field waste liquid carries out that delay stops stirring is heavy
Drop completes the efficient decolorizing of oil field waste liquid.
9. device according to claim 8, which is characterized in that the device further includes inclined plate sedimentation unit, for that will pass through
The oil field waste liquid that delay stops after stirring sedimentation further settles；
Preferably, the device further include filtering absorbing unit, for by the oil field waste liquid after inclined plate sedimentation unit settlement treatment into
The filtering absorption of one step.
10. device according to claim 8 or claim 9, which is characterized in that the device further includes pH on-line monitoring unit, conductance
Rate monitors unit on-line and liquid level monitors unit on-line；For monitor respectively pH value during electrocatalytic reaction, conductivity and
Liquid level.
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| CN113480058A (en) * | 2021-08-13 | 2021-10-08 | 苏州融和福天宝环保科技有限责任公司 | Treatment method of electroplating degreasing wastewater |
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