CN103880123A - Sequencing batch type electro-fenton device used for acrylonitrile wastewater advanced treatment and method thereof - Google Patents

Sequencing batch type electro-fenton device used for acrylonitrile wastewater advanced treatment and method thereof Download PDF

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Publication number
CN103880123A
CN103880123A CN201410136538.5A CN201410136538A CN103880123A CN 103880123 A CN103880123 A CN 103880123A CN 201410136538 A CN201410136538 A CN 201410136538A CN 103880123 A CN103880123 A CN 103880123A
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China
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electrolyzer
waste water
storage tank
liquid feeding
feeding pump
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CN201410136538.5A
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Chinese (zh)
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涂响
宋永会
魏健
代云容
肖书虎
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Chinese Research Academy of Environmental Sciences
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Chinese Research Academy of Environmental Sciences
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Abstract

The invention relates to a sequencing batch type electro-fenton device used for acrylonitrile wastewater advanced treatment. The electro-fenton device comprises an electrolytic cell, wherein a stirrer, an anode and a cathode are arranged in the electrolytic cell; the anode and the cathode are respectively connected with a positive electrode and a negative electrode of a direct-current stabilized power supply. The electro-fenton further comprises an acid liquor storage slot, an alkali liquor storage slot, a H2O2 storage slot and a wastewater storage slot, wherein the acid liquor storage slot is connected with the electrolytic cell and used for adding the acid liquor; the alkali liquor storage slot is used for adding the alkali liquor; and the H2O2 storage slot is used for adding H2O2 liquor and the wastewater storage slot is used for adding acrylonitrile wastewater. The electro-fenton device further comprises a pH probe and a pH controller, wherein the pH probe is arranged in the electrolytic cell; the pH controller is connected with the pH probe; the pH controller is used for controlling a first liquid inlet pump and a second liquid inlet pump to regulate pH value in the electrolytic cell; and a water outlet tube and a solenoid valve are connected to control water discharging from the electrolytic cell. The invention further provides a corresponding acrylonitrile wastewater advanced treatment method. According to the invention, by externally applying current, pH is regulated to realize recycling Fe<2+>, so that reaction efficiency is improved and operation cost is lowered.

Description

A kind of electricity of the sequence batch (for acrylic nitrile waste water advanced treatment Fenton apparatus and method
Technical field
The present invention relates to field of environment engineering technology, relate more specifically to a kind of electricity of the sequence batch (for acrylic nitrile waste water advanced treatment Fenton apparatus and method.
Background technology
Acrylic nitrile waste water is a kind of organic wastewater with difficult degradation thereby of petrochemical industry, contains the multiple hazardous and noxious substances such as vinyl cyanide, acetonitrile, sulphur ammonium, prussic acid, and its biodegradability is poor.Adopt traditional biochemical process, as activated sludge process, be difficult to that these are poisoned to thing and remove completely.In its bio-chemical effluent, still contain a certain amount of nitrile compound and ammonia nitrogen of containing, larger to Environmental health hazards, therefore need waste water to carry out advanced treatment.
Electricity Fenton (Fenton) method is the model electrochemical high-level oxidation technology developing on the basis of Fenton process.Compared with traditional Fenton process, electro-fenton process does not need or only needs to add a small amount of chemical agent, can significantly reduce processing cost.In addition, electric Fenton oxidation process not only comprises the advanced oxidation effect of hydroxyl radical free radical, also has anodic oxidation and electro-adsorption effect etc., and hardly degraded organic substance in waste water and ammonia nitrogen are had to good removal effect.Therefore, be applicable to adopting the water outlet of electro-fenton process after to acrylic nitrile waste water biochemical treatment to carry out advanced treatment.
Electric Fenton device of the prior art, how by impressed current, utilizes various types of electrodes to produce H 2o 2and Fe 2+, less to the operation control concern of device, not strong to the specific aim of processed waste water, and do not consider catalyst Fe 2+recovery and recycling, may occur a large amount of iron mud or reaction water outlet in Fe 3+content is higher.
Therefore, a kind of acrylic nitrile waste water advanced treatment apparatus that overcomes above-mentioned defect is expected to provide in this area.
Summary of the invention
The present invention is directed to the problems referred to above, a kind of electricity of the sequence batch (for acrylic nitrile waste water advanced treatment Fenton device has been proposed, it comprises electrolyzer, and agitator and anode and negative electrode are positioned at electrolyzer, and anode is connected with negative pole with the positive pole of D.C. regulated power supply respectively with negative electrode.Described electric Fenton device also comprise be connected with electrolyzer for by acid solution via the first liquid feeding pump add the acid solution storage tank of electrolyzer, for by alkaline solution via the second liquid feeding pump add the alkali lye storage tank of electrolyzer, for by H 2o 2solution adds the H of electrolyzer via the 3rd liquid feeding pump 2o 2storage tank and for acrylic nitrile waste water is added to the waste water storage tank of electrolyzer by the 4th liquid feeding pump.Described electric Fenton device also comprises that the pH that is positioned at electrolyzer pops one's head in and is attached thereto the pH controller connecing, and pH controller control the first and second liquid feeding pumps are to regulate the pH value in electrolyzer, and rising pipe is connected to control from electrolyzer water outlet with magnetic valve.
Preferably, anode is RuO 2/ Ti mesh electrode, negative electrode is titanium metal net, interelectrode distance is 1.0-2.5cm.
Also preferably, electric Fenton device also can comprise the fluid level controller of the liquid level for controlling electrolyzer.
In yet another aspect, the present invention proposes a kind of method of utilizing above-mentioned sequence batch (electricity Fenton device processing acrylic nitrile waste water, it comprises step:
(1) through liquid feeding pump from waste water storage tank by waste water suction electrolyzer, in the time that liquid level arrives fluid level controller place height, stop into water;
(2) by pH controller control the first liquid feeding pump, acid solution is added to electrolyzer by acid solution storage tank, the pH value of waste water in electrolyzer is adjusted to certain acidity;
(3) anode and cathodal closing, makes Fe in electrolyzer 3+be converted into Fe completely 2+;
(4) from H 2o 2storage tank slowly adds H 2o 2solution, starts electro-Fenton reaction;
(5) after reaction finishes, by pH controller control the second liquid feeding pump, alkaline solution is added to electrolyzer by alkali lye storage tank, the pH value of waste water in electrolyzer is adjusted to certain alkalescence, generate Fe (OH) 3flco, starts flocculation reaction;
(6) flocculation makes flco precipitation after finishing, and the supernatant liquor in electrolyzer is discharged by rising pipe.
Preferably, in electrolyzer, add FeSO 4as catalyzer.
Sequence batch (electricity Fenton apparatus and method provided by the invention have realized the automatic operation and control of electric Fenton device, simultaneously by impressed current, regulate pH, realize Fe 2+recycling, improved reaction efficiency, reduced running cost.
Accompanying drawing explanation
Fig. 1 is according to the schematic diagram of the sequence batch (electricity Fenton device of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the electric Fenton device for acrylic nitrile waste water advanced treatment according to the embodiment of the present invention is more specifically described.
According to the schematic diagram of the electric Fenton device for acrylic nitrile waste water advanced treatment of the embodiment of the present invention as shown in Figure 1.Electric Fenton device of the present invention comprises electrolyzer 1, and anode 3 and negative electrode 4 are positioned in electrolyzer 1, and is connected with negative pole with the positive pole of D.C. regulated power supply 5 respectively.Acid solution storage tank 11 is connected with electrolyzer 1, for acid solution is added to electrolyzer 1 via liquid feeding pump 8-1.Alkali lye storage tank 12 is connected with electrolyzer 1, for alkaline solution is added to electrolyzer 1 via liquid feeding pump 8-2.H 2o 2storage tank 13 is connected with electrolyzer 1, for by H 2o 2solution adds electrolyzer 1 via liquid feeding pump 8-3.Waste water storage tank 14 is connected with electrolyzer 1, for the acrylic nitrile waste water after Wastewater Treated by Activated Sludge Process is added to electrolyzer 1 by liquid feeding pump 8-4.PH probe 7 is connected with pH controller 10, thus by the operation of pH controller control liquid feeding pump 8-1 and 8-2 by the control that adds acid solution and alkaline solution being regulated to the pH value of electrolyzer.Rising pipe 15 is connected with magnetic valve 9, controls water outlet by magnetic valve 9.D.C. regulated power supply 5, fluid level controller 6, liquid feeding pump 8-1,8-2,8-3,8-4, magnetic valve 9, pH controller 10 are all connected with program timer (PLC) 16, and whole service process is realized automatically and being controlled by PLC.
The single cycle of operation of electric Fenton device of the present invention is divided into into water, electrolysis, flocculation, precipitation, 5 stages of water outlet, with sequencing batch operation.First, by catalyst Fe SO 4add electrolyzer.Then, waste water, stops into water in the time that liquid level arrives fluid level controller 6 place height through liquid feeding pump 8-4 suction electrolyzer 1 from waste water storage tank 14.After water inlet starts, utilize agitator 2 to stir.In water inlet process, pH controller 10 is controlled liquid feeding pump 8-1 acid solution is added to electrolyzer 1 by acid solution storage tank 11, and the pH value of waste water in electrolyzer 1 is adjusted to certain acidity.With rear electrode 3 and 4 energisings, make Fe in electrolyzer 3+be converted into Fe completely 2+, then from H 2o 2storage tank 13 slowly adds H 2o 2solution, starts electro-Fenton reaction.After reaction finishes, pH controller 10 is controlled liquid feeding pump 8-2 alkaline solution is added to electrolyzer 1 by alkali lye storage tank 12, and the pH value of waste water in electrolyzer 1 is adjusted to certain alkalescence, generates Fe (OH) 3flco, starts flocculation reaction.After flocculation finishes, stop stirring, make flco precipitation for some time, the supernatant liquor in electrolyzer 1 is discharged by rising pipe 15.Whole service process is realized automatically and being controlled by PLC16.
Provided a concrete example below, but this is only example, is not construed as limiting the invention.
In a concrete example, the effective volume of electrolyzer 1 is 20L, has the acrylic nitrile waste water after Wastewater Treated by Activated Sludge Process in waste water storage tank 14.First, the disposable FeSO that adds 0.7mmol/L in electrolyzer 4as catalyzer.In waste water, add the Na of 20mmol/L 2sO 4with the NaCl of 20mmol/L as supporting electrolyte.Adopt additional H 2o 2and Fe 2+electric Fenton mode waste water is processed.Electrode group is made up of 3 and 4 negative electrodes 4 of 2 anodes, and monolithic battery lead plate is of a size of 28cm × 14cm.Anode adopts RuO 2/ Ti mesh electrode, negative electrode is titanium metal net, and interelectrode distance is 2.0cm, and in reaction process, current density is 4.5mA/cm 2.
In this concrete example, waste water is from waste water storage tank 14 through liquid feeding pump 8-4 suction electrolyzer 1, and flooding time is 10min, in the time that liquid level arrives fluid level controller 6 place height, stops into water.After water inlet starts, utilize whipping appts 2 to stir.In water inlet process, pH controller 10 is controlled liquid feeding pump 8-1 by the H of 5.0mol/L 2sO 4solution adds electrolyzer 1 by acid solution storage tank 11, and the waste water ph in electrolyzer 1 is adjusted to 3.0.With rear electrode 3 and 4 energisings, make Fe in electrolyzer 1 3+be converted into Fe completely 2+, after 10min from from H 2o 2storage tank 13 slowly adds 30%H 2o 2solution, starts electro-Fenton reaction.H 2o 2the flow control of fluid filling pump 8-3 is at 5.0ml/min, H 2o 2the total dosage of solution is 20mL.The single electro-Fenton reaction time in cycle is 120min.After reaction finishes, pH controller 10 is controlled liquid feeding pump 8-2 the NaOH solution of 5.0mol/L is added to electrolyzer 1 by alkali lye storage tank 12, and the pH value of waste water in electrolyzer 1 is adjusted to 8.0, generates Fe (OH) 3flco stops stirring after 10min flocculation reaction, makes flco precipitation.After flco precipitation 20min, the supernatant liquor in electrolyzer 1 is discharged by rising pipe 15.The exchange ratio of whole process is 65%, and water discharge time is 10min.Whole service process is realized automatically and being controlled by PLC16, and the single periodic duty time is 180min.As the acrylic nitrile waste water COD after biochemical treatment crconcentration is at 100-120mg/L, when ammonia nitrogen concentration is 20-30mg/L, and this device water outlet COD after treatment crconcentration is less than 20mg/L, and ammonia nitrogen concentration is less than 5.0mg/L.COD crwith ammonia nitrogen removal frank respectively more than 80% and 75%.
The present invention adopts additional H 2o 2and Fe 2+electro-fenton process, additional H 2o 2and Fe 2+there is Fenton's reaction and can produce at short notice a large amount of highly active hydroxyl radical free radicals, hardly degraded organic substance in waste water is degraded rapidly, simultaneously by galvanic action, the Fe generating in reaction system 3+constantly be reduced to Fe at negative electrode 2+, can reduce Fe 2+consumption, improve reaction efficiency.Fe in the present invention 2+only need disposable adding, by adding alkali flocculation, acid adding dissolving, electroreduction, making Fe 2+reclaiming, realizes catalyzer recycling.

Claims (6)

1. the electricity of the sequence batch (for an acrylic nitrile waste water advanced treatment Fenton device, it is characterized in that comprising electrolyzer (1), in electrolyzer (1), there is agitator (2) and anode (3) and negative electrode (4), and anode (3) is connected with negative pole with the positive pole of D.C. regulated power supply (5) respectively with negative electrode (4), described electric Fenton device also comprise be connected with electrolyzer (1) for acid solution is added to the acid solution storage tank (11) of electrolyzer (1) via the first liquid feeding pump (8-1), for alkaline solution is added to the alkali lye storage tank (12) of electrolyzer (1) via the second liquid feeding pump (8-2), be used for H 2o 2solution adds the H of electrolyzer (1) via the 3rd liquid feeding pump (8-3) 2o 2storage tank (13) and for acrylic nitrile waste water is added to the waste water storage tank (14) of electrolyzer (1) by the 4th liquid feeding pump (8-4), described electric Fenton device also comprises that the pH that is positioned at electrolyzer (1) pops one's head in (7) and is attached thereto the pH controller (10) connecing, pH controller (10) is controlled the first and second liquid feeding pump (8-1,8-2), to regulate the pH value in electrolyzer (1), rising pipe (15) is connected to control from electrolyzer (1) water outlet with magnetic valve (9).
2. according to the sequence batch (electricity Fenton device described in claims 1, it is characterized in that anode (3) is RuO 2/ Ti mesh electrode, negative electrode (4) is titanium metal net, interelectrode distance is 1.0-2.5cm.
3. according to the sequence batch (electricity Fenton device described in claims 1, characterized by further comprising the fluid level controller (6) of the liquid level for controlling electrolyzer (1).
4. a method for acrylic nitrile waste water is processed in utilization according to the arbitrary described sequence batch (electricity of claims 1 to 3 Fenton device, and it comprises step:
(1) through liquid feeding pump from waste water storage tank by waste water suction electrolyzer, in the time that liquid level arrives fluid level controller place height, stop into water;
(2) by pH controller control the first liquid feeding pump, acid solution is added to electrolyzer by acid solution storage tank, the pH value of waste water in electrolyzer is adjusted to certain acidity;
(3) anode and cathodal closing, makes Fe in electrolyzer 3+be converted into Fe completely 2+;
(4) from H 2o 2storage tank slowly adds H 2o 2solution, starts electro-Fenton reaction;
(5) after reaction finishes, by pH controller control the second liquid feeding pump, alkaline solution is added to electrolyzer by alkali lye storage tank, the pH value of waste water in electrolyzer is adjusted to certain alkalescence, generate Fe (OH) 3flco, carries out flocculation reaction;
(6) flocculation makes flco precipitation after finishing, and the supernatant liquor in electrolyzer is discharged by rising pipe.
5. according to the method for the processing acrylic nitrile waste water of claim 4, it is characterized in that, before waste water enters electrolyzer, first add FeSO 4as catalyzer.
6. according to the method for the processing acrylic nitrile waste water of claim 4, it is characterized in that, adding after waste water, electrolyzer is stirred, until flocculation finishes.
CN201410136538.5A 2014-04-08 2014-04-08 Sequencing batch type electro-fenton device used for acrylonitrile wastewater advanced treatment and method thereof Pending CN103880123A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104261622A (en) * 2014-09-29 2015-01-07 中国电建集团中南勘测设计研究院有限公司 Fenton sewage treatment process and equipment thereof
CN104828912A (en) * 2015-04-22 2015-08-12 南京水思环保科技有限公司 Method for treating straight chain-substituted nitrile compound-containing industrial sewage by micro-current electrolysis method
CN106810029A (en) * 2015-12-02 2017-06-09 北京高能时代环境技术股份有限公司 The process unit and method of Electro-Fenton process treatment oil field waste sludge
CN107337301A (en) * 2017-09-05 2017-11-10 轻工业环境保护研究所 A kind of method of the electric Fenton processing waste water of additional hydrogen peroxide
CN109809601A (en) * 2019-03-19 2019-05-28 青岛科技大学 Batch-type electricity for degradation of organic waste water promotees iron reduced form Fenton oxidation method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101041475A (en) * 2007-03-09 2007-09-26 华南理工大学 Fenton and air-float integral water treating method
CN101844822A (en) * 2010-05-11 2010-09-29 沈阳建筑大学 Three-dimensional electrode/ electro-Fenton reactor
CN101962216A (en) * 2010-09-21 2011-02-02 复旦大学 Method for removing harmful algae in water body by adopting electro-Fenton

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101041475A (en) * 2007-03-09 2007-09-26 华南理工大学 Fenton and air-float integral water treating method
CN101844822A (en) * 2010-05-11 2010-09-29 沈阳建筑大学 Three-dimensional electrode/ electro-Fenton reactor
CN101962216A (en) * 2010-09-21 2011-02-02 复旦大学 Method for removing harmful algae in water body by adopting electro-Fenton

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104261622A (en) * 2014-09-29 2015-01-07 中国电建集团中南勘测设计研究院有限公司 Fenton sewage treatment process and equipment thereof
CN104828912A (en) * 2015-04-22 2015-08-12 南京水思环保科技有限公司 Method for treating straight chain-substituted nitrile compound-containing industrial sewage by micro-current electrolysis method
CN106810029A (en) * 2015-12-02 2017-06-09 北京高能时代环境技术股份有限公司 The process unit and method of Electro-Fenton process treatment oil field waste sludge
CN107337301A (en) * 2017-09-05 2017-11-10 轻工业环境保护研究所 A kind of method of the electric Fenton processing waste water of additional hydrogen peroxide
CN107337301B (en) * 2017-09-05 2019-09-24 轻工业环境保护研究所 A kind of method of the electric Fenton processing waste water of additional hydrogen peroxide
CN109809601A (en) * 2019-03-19 2019-05-28 青岛科技大学 Batch-type electricity for degradation of organic waste water promotees iron reduced form Fenton oxidation method
CN109809601B (en) * 2019-03-19 2022-06-21 青岛科技大学 Sequencing batch type electro-promoting iron reduction type Fenton oxidation method for degrading organic wastewater

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Application publication date: 20140625