CN105600884A - Purifying and disinfecting method for chlorine evolution anode nano-catalysis electrolytic method tail water - Google Patents
Purifying and disinfecting method for chlorine evolution anode nano-catalysis electrolytic method tail water Download PDFInfo
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- CN105600884A CN105600884A CN201610004156.6A CN201610004156A CN105600884A CN 105600884 A CN105600884 A CN 105600884A CN 201610004156 A CN201610004156 A CN 201610004156A CN 105600884 A CN105600884 A CN 105600884A
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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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
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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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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Abstract
The invention discloses a purifying and disinfecting method for chlorine evolution anode nano-catalysis electrolytic method tail water. The purifying and disinfecting method includes the following steps of 1 electrolyte solution preparing, wherein the mass ratio of electrolyte NaCl to water is 1:(30-100), and the electrolyte NaCl is stirred and uniformly dissolved; 2 electrolysis, wherein the electrolyte solution prepared in the step 1 passes through a chlorine evolution anode nano-catalysis electrolytic machine at the flow rate of 1-5 tons/hour to be electrolyzed; 3 mixing, wherein the electrolyte solution which contains free radical Cl. and is prepared in the step 2 is mixed with tail water by the mass ratio of 1:(10-100) for the first time, secondary mixing is conducted immediately after mixing for the first time by the mass ratio of the mixed solution to tail water=1:(100-500), and the content of free radical Cl. in the secondary mixed solution reaches 1.0-15 mg/L by adjusting currents of the electrolytic machine and the flow rate of the electrolyte solution. The purifying and disinfecting method can achieve efficient and fast disinfection, and is economical, reasonable, environmentally friendly, safe and high in applicability and compatibility.
Description
Technical field
The present invention relates to technology for treating industrial waste water field, be specifically related to one and analyse chlorine anode nanometer catalytic electrolysis(NCE) method tail water purifying sterilizing method.
Background technology
The method of urban wastewater treatment firm tail water sterilization has Physical, as disinfection by ultraviolet light, and ozonization etc.; ChangeLearn sterilization, as liquid chlorine, chlorine dioxide, hypochlorite, bromide, iodide etc. And traditional theseAlso there is all weak points in method, as poor stability, transport and storage easily cause leaks and explosion accident;Need to build huge treatment facility, take a large amount of land resource; Equipment investment costliness, drops into a large amount ofWater processing establishment fund; While adopting chemical method to process, need add a large amount of chemical agents, and mostlyChemical agent has corrosivity, in processing procedure, can produce accessory substance, causes secondary pollution; Need regularly moreChange ultraviolet lamp tube, operating cost is high and later maintenance workload is large.
Summary of the invention
The technical problem to be solved in the present invention is to overcome above-mentioned the deficiencies in the prior art, and provides a kind of efficientWhat Quick disinfection, economical rationality, green safety, applicability and compatibility were strong analyses chlorine anode nanometer catalytic electrolysisMethod tail water purifying sterilizing method.
For solving the problems of the technologies described above, concrete technical scheme of the present invention is as follows: one is analysed chlorine anode nanometer and urgedChange electrolysis tail water purifying sterilizing method, specifically comprise that step is as follows:
Step 1, preparation electrolyte, mass ratio 1:30～100 of electrolyte NaCl and water, stirring and dissolving is equalEven;
Step 2, electrolysis, by the electrolyte of preparing in step 1 by the flow of 0.1～5 ton/hour by analysing chlorineAnode nanometer catalytic electrolysis machine carries out electrolysis, and in electrolytic process, total voltage is 5～30V, adopts direct current to be500～2500A, voltage across poles 3～5V, plate current density 100～1500A/m2, like poles are apart from 7～11mm;
Step 3, mixing, by the electrolyte that contains free radical Cl producing in step 2 and tail water by qualityCarry out disposable mixing than 1:1000～5000, by regulating electric current and the flow of electrolyte of electrolysis machine, make to mixClose liquid and reach 1.0～15mg/L containing free radical Cl, after mixing, in 1～60 second, complete disinfection.
Further, described electrolyte inlet temperature is room temperature, 10～70 DEG C of electrolyte outlet temperature.
Further, in the time that the proportioning of electrolyte in electrolyte and water is 1:30～50, electrolytic anode current density100～1500A/m2。
Further, in the time that the proportioning of electrolyte in electrolyte and water is 1:50～100, electrolytic anode electric current is closeDegree 100～900A/m2。
Further, in described step 3, mix the electrolyte taking to contain free radical Cl and tail water in mass ratioMixed once is carried out in 1:10～50, enters immediately secondary and mix after mixing, and secondary mixes presses mixed liquor and tail waterCarry out mass ratio 1:20～100, by regulating electric current and the flow of electrolyte of electrolysis machine, makes secondary mixed liquorReach 1.0～15mg/L containing free radical Cl.
Further, described tail water comprises: the flotation tank water outlet of municipal sewage plant, middle water or running water.
Further, described electrolyte NaCl comprises: the mixture of NaCl or NaCl and KCl.
Adopt technical scheme of the present invention to there is following beneficial effect:
(1) efficiently quick: free radical Cl sterilization speed is exceedingly fast, and 0.5S can remove more than 99.9%Microorganism, and suppress its growth;
(2) low consumption: chlorine anode NCE technology is analysed in employing and equipment carries out disinfection to sewage treatment plant tail water,Cl concentration 1.0～15mg/L can reach the Disinfection Effect of one-level A;
(3) collaborative: analyse chlorine anode NCE technology and equipment while carrying out tail water sterilization, can purify waste water simultaneously,Reduce the pollutant indexs such as COD, suspension, total phosphorus, ammonia nitrogen, colourity, turbidity, be specially adapted to sewageThe mark of carrying for the treatment of plant is processed;
(4) applicability: plant capacity can regulate as required, is particularly suitable for influent quality fluctuation large, turbidSpend high tail water sterilization; And have very high compatibility, can with original ultraviolet disinfection, disinfection by chlorine dioxide,The facility compatibility of liquid chlorine disinfection, hypochlorite sterilization;
(5) automation is with intelligent: equipment volume is little, and service life is long, and automaticity is high, install,Operation and maintenance is simple, convenient, just can be reached and be controlled out water microorganism and refer to by the operating current of conditioning equipmentTarget object, can realize Based Intelligent Control and far-end operation by microcomputer;
(6) green: analyse the free radical that chlorine anode NCE sterilization mainly utilizes electrolysis to produce, do not produce secondaryPollute, harmless to people fowl and aquatic animal;
(7) safety: analyse the electrolyte that chlorine anode NCE equipment uses in electrolytic process and belong to natural materials,Itself is nontoxic, and the non-chlorine of material that electrolytic process produces does not have chlorine to discharge, no in disinfecting processCan human and environment be damaged and be polluted. NCE equipment only has a small amount of hydrogen to discharge in electrolytic process, dirtWater factory's sterilization is all open type, and exhaust ventilation is good, can not cause hydrogen to assemble and form potential safety hazard. AndNCE equipment operating voltage < 30V, and be direct current, safe and reliable.
Brief description of the drawings
Fig. 1 is process flow diagram of the present invention;
Fig. 2 is the schematic diagram that is related to of chlorine radical concentration of the present invention and water outlet excrement colibacillus group number.
Detailed description of the invention
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand,Below in conjunction with concrete diagram, further set forth the present invention.
Embodiment 1
As shown in Figure 1, one is analysed chlorine anode nanometer catalytic electrolysis method tail water purifying sterilizing method, specifically comprisesStep is as follows:
Step 1, preparation electrolyte, the mass ratio 1:50 of electrolyte NaCl and water, stirring and dissolving is even;
Step 2, electrolysis, by the electrolyte of preparing in step 1 by the flow of 1.85 tons/hour by analysing chlorine sunUtmost point nano-catalytic electrolysis machine carries out electrolysis, and in electrolytic process, total voltage is 18～20V, adopts direct current to be1700A, voltage across poles 3V, plate current density 700A/m2, like poles are apart from 7mm, electrolyte import30 DEG C of temperature, 60 DEG C of outlet temperatures.
Step 3, mixing, by the electrolyte that contains free radical Cl producing in step 2 and tail water by qualityCarry out mixed once than 1:18, enter immediately secondary and mix after mixing, secondary mixes presses mixed liquor and tail waterMass ratio 1:100 carries out, and by regulating electric current and the flow of electrolyte of electrolysis machine, secondary mixed liquor is contained certainlyBy base, Cl reaches 3.5mg/L, mixes in latter 1 second and completes disinfection.
Embodiment 2
As shown in Figure 1, one is analysed chlorine anode nanometer catalytic electrolysis method tail water purifying sterilizing method, specifically comprisesStep is as follows:
Step 1, preparation electrolyte, the mass ratio 1:40 of electrolyte NaCl and water, stirring and dissolving is even;
Step 2, electrolysis, by the electrolyte of preparing in step 1 by the flow of 2.15 tons/hour by analysing chlorine sunUtmost point nano-catalytic electrolysis machine carries out electrolysis, and in electrolytic process, total voltage is 18～20V, adopts direct current to be1990A, voltage across poles 4V, plate current density 850A/m2, like poles are apart from 7mm, electrolyte import30 DEG C of temperature, 65 DEG C of outlet temperatures.
Step 3, mixing, by the electrolyte that contains free radical Cl producing in step 2 and tail water by qualityCarry out mixed once than 1:10, enter immediately secondary and mix after mixing, secondary mixes presses mixed liquor and tail waterMass ratio 1:200 carries out, and by regulating electric current and the flow of electrolyte of electrolysis machine, secondary mixed liquor is contained certainlyBy base, Cl reaches 3.5mg/L, mixes in latter 1 second and completes disinfection.
As shown in Figure 2, along with Cl concentration increases gradually, the killing rate of excrement colibacillus group rises thereupon. Cl is denseWhen degree reaches 2.1mg/L, water outlet excrement colibacillus group concentration can reach one-level B discharge standard, lower than 104Individual/L; When Cl reaches 2.2mg/L, excrement colibacillus group concentration is lower than reaching one-level A discharge standard,Lower than 103Individual/L, mixes in latter 1 second and completes disinfection.
Tail water adopts after the present invention's sterilization, adopts two kinds of method tests of filter membrane method and multitube fermentation method, test knotFruit is as shown in the table:
In water outlet, 1000/L of the equal < of excrement colibacillus group, meets country's " urban wastewater treatment firm pollutant emissionStandard " (GB18918-2002) requirement of control of microorganisms index in one-level A discharge standard, fecal coliformGroup's clearance is all higher than 99.99%, and microbiological indicator qualification rate is 100%.
Adopt the present invention when tail water is sterilized, can purify waste water simultaneously, reduce COD, suspension, total phosphorus,The pollutant indexs such as ammonia nitrogen, colourity, turbidity, as shown in the table:
The principle of chlorine radical Cl sterilization:
NCE can produce the free radical that chemism is very strong: Cl, H, O, OH the in the situation that of energisingDeng, for different solution and purposes, can adopt dissimilar nanometer anode (analyse chlorine, analyse oxygen anodes),In the sterilization of water body, the present invention emphatically research use analyses chlorine nanometer anode.
The reaction mechanism mechanism of reaction of Cl:
Material under different conditions, its Function and operation has a great difference, with H2O and Cl are at different conditionsUnder action and function compare. The free radical of OH, H, its effect is disposable, and the work of ClWith being continuation.
The bactericidal action that experiment showed, the free radical Cl of same quality is the more than 10 times of liquid chlorine, if usedLiquid chlorine disinfection, in the time that its concentration needs 30mg/L, free radical chlorine Cl only needs 0.5mg/L. Free radical chlorineCl easily obtains and harmless, and whole process is environmental protection, easily allows people accept. Therefore, free radicalCl is a kind of efficient, free of contamination, green disinfectant. NCE is the effective way that produces ClWith method.
The function of free radical:
The free radical taking Cl as master that NCE can produce the in the situation that of energising, can be by following 5Effect, thereby the effective fast spore of kill virus, bacterium and algae, play the object of sterilization.
1. oxidation Decomposition microorganism (virus, bacterium, monospore algae, the spore of many spores algae, gamete) amino acidActive group, cause protein chemistry to damage until microbial death;
2. the side chain of the phosphatide polyenoic fatty acid of attack cells film, causes polyenoic fatty acid to be degraded rapidly, causesThe lipid peroxidation of cell membrane causes cellular damage and death;
3. bringing out cell initiative commits suiside---apoptotic process;
4. make clasmatosis, broken wall death;
5. the signal stable, interference cell of upsetting endocellular metabolism conducts.
Traditional chlorination (liquid chlorine method, hypochlorous acid method), disinfection by chlorine dioxide, the master of its killing microorganismsWanting mechanism is that the electroneutral molecule HClO that utilizes hydrolysis to produce can be diffused into electronegative bacterium surface, and penetratesTo bacterium inside, the protein structure function of oxidation and destroy microorganisms adventitia or enzyme, thus make microorganism deadDie. And in the process of nano-catalytic electrolysis, first producing Cl, two Cl form the chlorine of nascent state, last waterSeparate and form HClO; Chlorine, the HClO of Cl, nascent state have strong oxidizing property, chemism from high to low byGradually reduce, Here it is, and the sterilization of nano-catalytic electrosterilization has aobvious than traditional chlorination, disinfection by chlorine dioxideThe reason of work advantage.
Adopt Economic and Efficiency Analysis of the present invention:
Taking 100,000 ton per day tail water as example, calculate cost of investment as follows:
Equipment investment: 3,020,000 yuan of (specifically comprising salt system, NCE main frame, Venturi tube ejectors, mixedClose device etc.),
Investment of occupation of land: 60,000 yuan (floor space is 40～50 cubic metres),
Gross investment: 3,080,000 yuan.
Adopt operating cost analysis of the present invention:
(1), in Xiamen, encircle after Shui Wu Yuandang Ya Sewage Plant NCE processes and reach one-level B discharge standard, ton tail water cost statementAs follows:
(2), in Xiamen, encircle after Shui Wu Yuandang Ya Sewage Plant NCE processes that to reach one-level A discharge standard (be the large flora number of excrement1000/L of <), ton tail water cost statement is as follows:
The comparison of the present invention and traditional sterilization method:
The economic analysis comparison of NCE and traditional sterilization method
Note: 1. 2. 3. 4. 5. taking 100,000 ton per day tail water as example.
The technical staff of the industry should understand, and the present invention is not restricted to the described embodiments, above-described embodimentWith in description, describe principle of the present invention is just described, in the prerequisite that does not depart from spirit and scope of the inventionLower the present invention also has various changes and modifications.
Claims (7)
1. analyse a chlorine anode nanometer catalytic electrolysis method tail water purifying sterilizing method, it is characterized in that: specifically compriseStep is as follows:
Step 1, preparation electrolyte, mass ratio 1:30～100 of electrolyte NaCl and water, stirring and dissolving is equalEven;
Step 2, electrolysis, by the electrolyte of preparing in step 1 by the flow of 0.1～5 ton/hour by analysing chlorineAnode nanometer catalytic electrolysis machine carries out electrolysis, and in electrolytic process, total voltage is 5～30V, adopts direct current to be500～2500A, voltage across poles 3～5V, plate current density 100～1500A/m2, like poles are apart from 7～11mm;
Step 3, mixing, by the electrolyte that contains free radical Cl producing in step 2 and tail water by qualityCarry out disposable mixing than 1:1000～5000, by regulating electric current and the flow of electrolyte of electrolysis machine, make to mixClose liquid and reach 1.0～15mg/L containing free radical Cl, after mixing, in 1～60 second, complete disinfection.
2. according to claim 1ly analyse chlorine anode nanometer catalytic electrolysis method tail water purifying sterilizing method, its spyLevy and be: 10～70 DEG C of described electrolyte outlet temperature.
3. according to claim 2ly analyse chlorine anode nanometer catalytic electrolysis method tail water purifying sterilizing method, its spyLevy and be: in the time that the proportioning of electrolyte in electrolyte and water is 1:30～50, electrolytic anode current density900～1500A/m2。
4. according to claim 2ly analyse chlorine anode nanometer catalytic electrolysis method tail water purifying sterilizing method, its spyLevy and be: in the time that the proportioning of electrolyte in electrolyte and water is 1:50～100, electrolytic anode current density100～900A/m2。
5. according to claim 1ly analyse chlorine anode nanometer catalytic electrolysis method tail water purifying sterilizing method, its spyLevy and be: in described step 3, mix the electrolyte taking to contain free radical Cl and tail water in mass ratio 1:10～50 carry out mixed once, enter immediately secondary and mix after mixing, and secondary mixes presses mixed liquor and tail water qualityCarry out than 1:20～100, by regulating electric current and the flow of electrolyte of electrolysis machine, secondary mixed liquor is contained certainlyBy base, Cl reaches 1.0～15mg/L.
6. according to claim 1ly analyse chlorine anode nanometer catalytic electrolysis method tail water purifying sterilizing method, its spyLevy and be: described tail water comprises: the flotation tank water outlet of municipal sewage plant, middle water or running water.
7. according to claim 1ly analyse chlorine anode nanometer catalytic electrolysis method tail water purifying sterilizing method, its spyLevy and be: described electrolyte NaCl comprises: the mixture of NaCl or NaCl and KCl.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106865700A (en) * | 2017-02-14 | 2017-06-20 | 美的集团股份有限公司 | Electrochemistry sterilizing methods |
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| US7172699B1 (en) * | 2004-10-13 | 2007-02-06 | Eimco Water Technologies Llc | Energy efficient wastewater treatment for nitrogen and phosphorus removal |
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| CN104528957A (en) * | 2014-12-18 | 2015-04-22 | 江苏润聚新材料科技有限公司 | Circulating water treatment method and equipment |
| CN105174633A (en) * | 2015-09-28 | 2015-12-23 | 罗依依 | Comprehensive standard increase method for increasing standard of discharged water of municipal wastewater treatment plant from first grade B to first grade A |
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2016
- 2016-01-04 CN CN201610004156.6A patent/CN105600884A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US7172699B1 (en) * | 2004-10-13 | 2007-02-06 | Eimco Water Technologies Llc | Energy efficient wastewater treatment for nitrogen and phosphorus removal |
| CN104176797A (en) * | 2014-09-11 | 2014-12-03 | 北京今大禹环保技术有限公司 | Low-energy-consumption electrochemical treatment device and method for degradation-resistant organic wastewater |
| CN104528957A (en) * | 2014-12-18 | 2015-04-22 | 江苏润聚新材料科技有限公司 | Circulating water treatment method and equipment |
| CN105174633A (en) * | 2015-09-28 | 2015-12-23 | 罗依依 | Comprehensive standard increase method for increasing standard of discharged water of municipal wastewater treatment plant from first grade B to first grade A |
Non-Patent Citations (2)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106865700A (en) * | 2017-02-14 | 2017-06-20 | 美的集团股份有限公司 | Electrochemistry sterilizing methods |
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