CN105060583A - Treatment technique and system of toxic-volatile-gas-containing high-concentration industrial wastewater - Google Patents

Treatment technique and system of toxic-volatile-gas-containing high-concentration industrial wastewater Download PDF

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Publication number
CN105060583A
CN105060583A CN201510570469.3A CN201510570469A CN105060583A CN 105060583 A CN105060583 A CN 105060583A CN 201510570469 A CN201510570469 A CN 201510570469A CN 105060583 A CN105060583 A CN 105060583A
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China
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water
treatment
concentration
volatile gases
concentration industrial
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CN201510570469.3A
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Chinese (zh)
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张继荣
王进明
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南京中衡元环保设备有限公司
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Priority to CN201510570469.3A priority Critical patent/CN105060583A/en
Publication of CN105060583A publication Critical patent/CN105060583A/en

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Abstract

The invention discloses a treatment technique and system of toxic-volatile-gas-containing high-concentration industrial wastewater. The treatment technique comprises the following steps: S1: delivering wastewater to an isolated multiphase balance floatation device to remove oil and insoluble organic matters to obtain first treated water and waste gas; S2: treating waste gas by an air-entraining cyclone generator, and discharging after reaching the standard; and S3. delivering the first treated water into a biphase circulating catalytic oxidation device to perform catalytic oxidation on the organic matters and obtain satisfactory discharge water. The treatment technique and system disclosed by the invention is capable of enhancing the biodegradability of wastewater, lowering the content of stink substances in wastewater, reducing the toxicity of wastewater, lowering the COD (chemical oxygen demand) of wastewater and eliminating chroma, effectively prevents toxic gas from escape, prevents explosion and other hazards from occurrence, has high safety factor, and can prevent waste gas from inorganized discharge and effectively treat waste gas, thereby avoiding secondary pollution and being low in cost.

Description

A kind for the treatment of process of toxic volatile gases high-concentration industrial-water and system
Technical field
The present invention relates to field of industrial waste water treatment, particularly relate to a kind for the treatment of process and system of toxic volatile gases high-concentration industrial-water.
Background technology
At present, toxic volatile gases high-concentration industrial-water refers to the waste water containing volatile gaseses such as a large amount of sulfide, mercaptan, ammonia, COD content is up to 2-10 ten thousand mg/L, wherein characteristic contamination is mainly containing phenyl ring, heterocyclic material, have the features such as dissolved oxygen is low, toxicity large, biodegradability extreme difference, its pollution problem is problem demanding prompt solution in waste water treatment engineering always.In order to thoroughly solve the problem of toxic volatile gases high-concentration industrial-water contaminate environment, the process of being badly in need of developing this type of waste water applicable is efficient, low cost, do not produce the Technology of secondary pollution.For the method that the process of toxic volatile gases high-concentration industrial-water is conventional be at present: extraction process, burning method, conventional oxidation reduction method etc., this several method be high for high-concentration waste water ubiquity cost, can not long-period stable operation, be difficult to meet the problems such as biochemical requirement further.
Extraction process is mixed mutually by organic phase and aqueous phase, after wanting isolated material to enter organic phase, then two-phase is separated by two-phase mass density difference in aqueous phase.Extraction process is widely used in metallurgical and chemical industry, especially high-enriched organics is separated and there is certain treatment effect, but for the waste water of complicated component, especially when single organic concentration is low, give to be separated and increase difficulty, secondary treatment need be carried out to extraction liquid, add investment and running cost; Meanwhile, in waste water, introduce extraction agent, easily cause secondary pollution.
Burning method has greater advantage for the process of ultrahigh concentration waste water (COD > 200,000 mg/L), is applicable to the wastewater treatment of little, the very high concentrations of the water yield, but easily produces secondary pollution in burning process simultaneously.
Conventional oxidation reduction method is divided into wet oxidation process (WAO) and overcritical wet oxidation process, oxidation operation in waste water is mainly become carbonic acid gas and water under high temperature, high pressure by these class methods, thus reach contaminant degradation object, this class methods processing efficiency is high, scope is wide, but high temperature, high pressure not only make investment running cost high, and can bring potential safety hazard, and especially in petrochemical industry, high temperature, condition of high voltage can limit this technology application.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, a kind of biodegradability that can improve waste water is provided, greatly can reduce the content of the stench class materials such as high-concentration industrial-water medium sulphide content and mercaptan, the toxicity of trade effluent can be cut down, the COD of trade effluent can be reduced and eliminate colourity, can effectively prevent volatility toxic gas from escaping and preventing air from entering the dangerous generations such as explosion caused, safety coefficient is high, waste gas uncontrollable discharge can be prevented, effectively can process waste gas, can avoid causing secondary pollution and the treatment process of the low toxic volatile gases high-concentration industrial-water of cost and system.
The present invention is for solving the problems of the technologies described above, and its technical scheme adopted is as follows:
A treatment process for toxic volatile gases high-concentration industrial-water, comprises following processing step:
Step S1: waste water is delivered to so that the oils in waste water and insoluble organism are brought to the water surface in isolation type multiphase balanced air floatation device, and the oils of the water surface and insoluble organic matter removal will be brought to and obtain the first process water and waste gas;
Step S2: the waste gas obtained by step S1 is qualified discharge after the process of bleed rotational flow generator;
Step S3: the obtained by step S1 first process water is delivered in two-phase cycle catalytic oxidizing equipment to carry out catalyzed oxidation to the organism in the first process water and to obtain satisfactory discharge water.
In above-mentioned steps S1, be delivered to again after first waste water fully mix with coagulating agent in static mixer in above-mentioned isolation type multiphase balanced air floatation device, such design can remove oils in waste water and suspended substance, reduce the running cost of subsequent catalyst oxidation, the steady running of subsequent treatment process can be ensured.
In above-mentioned steps S1, above-mentioned isolation type multiphase balanced air floatation device for patentee be Nanjing Zhong Hengyuan environmental protection equipment company limited, the patent No. is the patented technology described in the patent document of ZL201210072393.8, utilize this isolation type multiphase balanced air floatation device that the oils in waste water and insoluble organism are brought to the water surface and by oils and insoluble organic matter removal, not only can effectively prevent volatility toxic gas from escaping and preventing air from entering the dangerous generations such as explosion caused, safety coefficient is high, and can also effluent quality be ensured, be conducive to reducing fouling membrane.
In above-mentioned steps S2, above-mentioned bleed rotational flow generator for patent right people be Nanjing Zhong Hengyuan environmental protection equipment company limited, the patent No. is the patented technology described in the patent document of ZL201320592932.0, this bleed rotational flow generator is adopted to collect waste gas, process, effectively prevent the uncontrollable discharge of waste gas, and effective process has been carried out to waste gas, make it meet qualified discharge requirement.
In above-mentioned steps S3, above-mentioned two-phase cycle catalytic oxidizing equipment is patent right people is Nanjing Zhong Hengyuan environmental protection equipment company limited, the patent No. is the patented technology described in the patent document of ZL201210379268.1, in technical scheme of the present invention, this two-phase cycle catalytic oxidizing equipment is utilized to carry out catalyzed oxidation to the organism in the first process water, this two-phase cycle catalytic oxidizing equipment can by the difficult degradation in trade effluent, inhibitory substance is decomposed into easily biochemical small-molecule substance, improve the biodegradability of trade effluent, greatly reduce the content of the stench class materials such as high-concentration industrial-water medium sulphide content and mercaptan, also the toxicity of trade effluent is significantly reduced, also contribute to the COD and the elimination colourity that reduce trade effluent, reduce secondary pollution.
Above-mentioned two-phase cycle catalytic oxidizing equipment, when carrying out catalyzed oxidation, utilizes H 2o 2as oxygenant, the Fe produced with electrolytic reduction 2+as catalyzer, and produce hydroxyl radical free radical (OH) via special redox reaction, hydroxyl radical free radical (OH) is a strong oxidizer, therefore oxidation operation can be decomposed.Its principal reaction formula is as follows:
Concrete reaction formula is as follows:
Reaction on anode, mainly comprises dissociating and organic oxidation of water:
2H 2O→O 2+4H ++4e -
Fe 2+→Fe 3++e -
Organics+O 2→CO 2+H 2O
Reaction on negative electrode, mainly comprise water dissociate and and ferric reduction:
Fe 3++e -→Fe 2+
2H 2O+2e -→H 2+2OH -
2O 2+6H ++6e -→2H 2O+H 2O 2
The reaction of water-soluble liquid phase, mainly comprises the catalysis of hydrogen peroxide and organic decomposition reaction:
H 2O 2+Fe 2+→OH+OH -+Fe 3+
H 2O 2+Fe 3+→Fe 2++H ++HO 2
RH+OH→H 2O+R
Fe 2++OH→Fe 3++OH -
R+Fe 3+→Fe 2++Products
R+OH→ROH
R+H 2O 2→ROH+OH
HO 2+Fe 3+→O 2+Fe 2++H +
OH+H 2O 2→HO 2+H 2O
And principal reaction is shown below, oxidation operation is become carbonic acid gas and water:
H 2o 2+ Fe 2++ organism → CO 2+ H 2o+Fe 3+
While can finding out that organism is oxidized to carbonic acid gas and water from above formula, Fe 2+catalyzer also becomes Fe 3+, therefore utilize the method for electrolytic reduction to make Fe 3+restore as Fe at negative electrode 2+catalyzer, this is two-phase cycle catalyzed oxidation, achieves Fe 2+and Fe 3+two-phase cycle, effectively save FeSO 4consumption, improve the efficiency of catalyzed oxidation; Fe can be found out by the reaction formula of negative electrode 3+be reduced into Fe 2+, utilize sacrificial anode iron to produce Fe with another kind 2+the Measures compare of catalyzer, sacrificial anode iron often produces 1 mole of Fe 2+need 2 moles of electricity, and in technical scheme of the present invention, only need 1 mole of electricity, and constantly by the Fe of Fenton method generation 3+be reduced into Fe 2+repeat recycling, therefore can significantly reduce the consumption of anode metal iron and the consumption of electricity and final sludge yield; Moreover, H 2o 2directly make an addition to two-phase cycle catalytic oxidizing equipment and the Fe produced with electrolysis 2+and the organism reaction in waste water, and the Fe that reaction produces 3+directly can become Fe in cathodic reduction again 2+and participate in reaction endlessly, make H 2o 2oxidation efficiency improve, reduce H 2o 2chemical feeding quantity and reduce running cost; In addition, the some of organism also can be removed by the anodizing effect occurred at anode.It can thus be appreciated that the treatment process of toxic volatile gases high-concentration industrial-water of the present invention not only improves the treatment effect of conventional catalyst oxidation, and reduce further the usage quantity of catalyzer, reduces Fe 3+the sludge quantity produced also reduces working cost greatly, is also effectively converted into by wherein harmful organism harmless and is easy to the material of degrading, improve the biodegradability of waste water.
One as the treatment process to toxic volatile gases high-concentration industrial-water of the present invention is improved, in above-mentioned steps S1, and the retention time of sewage t of above-mentioned waste water in isolation type multiphase balanced air floatation device 1be 10 ~ 30min.In this step S1, by retention time of sewage t 1be restricted to 10 ~ 30min, on the one hand, can better the oils in waste water and insoluble organism brought to the water surface and remove, on the other hand, better the COD clearance in waste water can be brought up to 10 ~ 40%, better the clearance of the VOC in waste water can also be brought up to 80 ~ 90%, if t 1be less than 10min, then not only can affect the oils in removal waste water and insoluble organism, but also have influence on COD and VOC in waste water, if t 1be greater than 30min, then can cause the meaningless wasting of resources, be unfavorable for the reduction of cost.
One as the treatment process to toxic volatile gases high-concentration industrial-water of the present invention is improved, in above-mentioned steps S3, before catalyzed oxidation is carried out to the organism in the first process water, first pH value adjustment is carried out to the first process water, and the pH value of the first process water is adjusted to 3 ~ 5.
The pH value of this first process water being adjusted to 3 ~ 5, providing more favourable condition to carrying out catalyzed oxidation in two-phase cycle catalytic oxidizing equipment like this.
Further, in above-mentioned steps S3, after catalyzed oxidation is carried out to the organism in the first process water, obtain the second process water, and in the second process water, add alkali lye to regulate its pH value acquisition the 3rd process water.In the second process water, add alkali lye contribute to carrying out follow-up contamination precipitation work to the 3rd process water, if still remain sour environment, then can have influence on flocculation and the precipitation of follow-up impurity to a great extent.
Further, in above-mentioned steps S3, in above-mentioned 3rd process water, add flocculation agent so that mud and satisfactory discharge water will be obtained under contamination precipitation wherein.This flocculation agent is PAFS, ferric sulfate, aluminium iron polychloride or polymeric flocculant; Stir to improve rate of mass transfer to the 3rd process water by stirring rake, intensified response effect in flocculation process.
After acquisition mud, the present invention adopts centrifuge, sheet frame water extracter, folded spiral shell water extracter, gyro water extracter or belt type dewaterer dewater to mud, preferably folded spiral shell water extracter, folded spiral shell water extracter has good treatment effect for the mud containing oils, and its level of automation is high, good stability, running cost is low, good leak tightness, compares other water extracter and decreases malodorous discharge, can not produce secondary pollution.
Further, in above-mentioned steps S3, the above-mentioned first hydraulic detention time t of process water in two-phase cycle catalytic oxidizing equipment 2be 0.5 ~ 3h.By the hydraulic detention time t of the first process water in step S3 2be restricted to 0.5 ~ 3h, can ensure that two-phase cycle catalytic oxidizing equipment utilizes catalyzed oxidation fully to degrade to the organism in waste water, if hydraulic detention time t 2be less than 0.5h, then the partial organic substances in waste water may be caused not degrade, badly influenced the treatment effect to waste water, if hydraulic detention time t 2be greater than 3h, then can cause the meaningless wasting of resources, do not utilize the reduction of cost.
In this step S3, first processes water in two-phase cycle catalytic oxidizing equipment in 30 oc ~ 50 ocatalyzed oxidation is carried out when C, a standard atmospheric pressure, such design makes catalyzed oxidation carry out under normal temperature, normal pressure, High Temperature High Pressure in prior art not only can be avoided to be oxidized the potential safety hazard brought, and be conducive to reducing running cost, in addition, Application Areas and the range of application of the treatment process of toxic volatile gases high-concentration industrial-water of the present invention is also expanded.
In addition, in this step S3, Fe 2+with H 2o 2mol ratio be 1:1 ~ 1:5.
Present invention also offers a kind for the treatment of system of the treatment process for above-mentioned toxic volatile gases high-concentration industrial-water, its technical scheme adopted is as follows:
A treatment system for toxic volatile gases high-concentration industrial-water, comprises isolation type multiphase balanced air floatation device, bleed rotational flow generator and two-phase cycle catalytic oxidizing equipment;
Above-mentioned two-phase cycle catalytic oxidizing equipment comprises the pH regulator groove, electrolytic oxidation groove, neutralizing well, flocculation tank and the settling bath that are communicated with successively;
The waste gas delivery port of above-mentioned isolation type multiphase balanced air floatation device is communicated with pH regulator groove with above-mentioned bleed rotational flow generator respectively with process water output.
In the treatment system of toxic volatile gases high-concentration industrial-water of the present invention, in pH regulator groove, be furnished with whipping appts, the first process water fully can be contacted with acid solution or alkali lye, accelerate to carry out pH regulator to the first process water.
Above-mentioned electrolytic oxidation groove is used for carrying out catalyzed oxidation to the organism in the first process water, and this electrolytic oxidation groove airtight electrolytic oxidation groove that is stainless steel, such design not only contributes to the corrosion resistance nature strengthening electrolytic oxidation groove, be of value to the work-ing life extending this electrolytic oxidation groove, but also can prevent volatile matter from overflowing, ensure the effect of catalyzed oxidation, and external environment can be avoided to cause disadvantageous effect to catalyzed oxidation.In addition, be provided with electrolytic anode and electrolysis cathode in this electrolytic oxidation groove, this electrolytic anode is DSA titanium plate, and electrolysis cathode is stainless steel plate.
Above-mentioned neutralizing well is used for adding alkali lye adjust ph to above-mentioned second process water, and the pH value of the second process water is adjusted to 6 ~ 9, to obtain the 3rd process water, for follow-up contamination precipitation operation is ready, if the pH value of the 3rd process water is less than 6, then the 3rd process water slant acidity, be unfavorable for contamination precipitation, if the pH value of the 3rd process water is greater than 9, then can causes the meaningless wasting of resources, be unfavorable for the reduction of cost.
Be provided with stirring rake in above-mentioned flocculation tank, to stir in flocculation process, thus improve the rate of mass transfer of the 3rd process water, thus intensified response effect; This stirring rake adopts oar blade type stirring rake, frame type agitating blade or anchor formula stirring rake.
Above-mentioned isolation type multiphase balanced air floatation device is also provided with intelligence and adds agent module, air supporting module and gas security protection module; Wherein, intelligence adds agent module, when waste water is through static mixer, add agent module by this intelligence and add coagulating agent in static mixer, waste water is fully mixed in static mixer with coagulating agent, this avoid employing and manually add coagulating agent, contribute to the labour intensity weakening staff; Air supporting module, the dissolved air water that the waste water after dosing and multiphase flow gas-dissolving pump can be made to produce fully contacts, utilize will wherein oils and insoluble organism floating to the water surface; Gas safety protection module; this gas safety protection module adopts nitrogen as source of the gas; poisonous and the volatile gases such as the hydrogen sulfide in this isolation type multiphase balanced air floatation device, ammonia can be stoped outward to overflow; prevent secondary pollution from producing; can prevent again the oxygen of this isolation type multiphase balanced air floatation device outside from entering wherein, thus avoid bringing potential safety hazard.
One as the treatment system to toxic volatile gases high-concentration industrial-water of the present invention is improved, above-mentioned two-phase cycle catalytic oxidizing equipment also comprises electrolytic reaction groove, and between this electrolytic reaction groove relief outlet of being arranged on above-mentioned electrolytic oxidation groove and input aperture.Being arranged so that the not yet fully oxidized mixture flowed into from electrolytic oxidation groove in electrolytic reaction groove is back in electrolytic oxidation groove and carrying out quadric catalysis oxidation of electrolytic reaction groove, make the organism in the first process water be substantially oxidized decomposition, thus ensure the treatment effect to trade effluent and effluent quality.
Preferably, above-mentioned settling bath is ramp type settling bath, vertical-flow settling bath or radial-flow type sedimentation groove.
In addition, in technical scheme of the present invention, to be allly not specifically noted, all by adopting the conventional means in this area to realize the technical program.
Therefore, the invention has the beneficial effects as follows the treatment process and system that provide a kind of toxic volatile gases high-concentration industrial-water, this treatment process and system can improve the biodegradability of waste water, greatly can reduce the content of the stench class materials such as high-concentration industrial-water medium sulphide content and mercaptan, also the toxicity of trade effluent can be cut down, the COD of trade effluent can also be reduced and eliminate colourity, and also have and can effectively prevent volatility toxic gas from escaping and preventing air from entering explosion caused etc. dangerously to occur, safety coefficient is high, waste gas uncontrollable discharge can be prevented and effective advantage processed can be carried out to waste gas, thus avoid causing secondary pollution, cost also significantly reduces.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the treatment system of toxic volatile gases high-concentration industrial-water in the present invention;
In accompanying drawing, 1 is isolation type multiphase balanced air floatation device, and 2 is bleed rotational flow generator, and 3 is pH regulator groove, and 4 is electrolytic oxidation groove, and 5 is neutralizing well, and 6 is flocculation tank, and 7 is settling bath.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment one:
Present embodiments provide a kind for the treatment of system of toxic volatile gases high-concentration industrial-water, comprise isolation type multiphase balanced air floatation device 1, bleed rotational flow generator 2 and two-phase cycle catalytic oxidizing equipment;
As shown in Figure 1, two-phase cycle catalytic oxidizing equipment comprises the pH regulator groove 3, electrolytic oxidation groove 4, neutralizing well 5, flocculation tank 6 and the settling bath 7 that are communicated with successively; The waste gas delivery port of this isolation type multiphase balanced air floatation device 1 is communicated with pH regulator groove 3 with above-mentioned bleed rotational flow generator 2 respectively with process water output.
Above-mentioned two-phase cycle catalytic oxidizing equipment also comprises electrolytic reaction groove, and between this electrolytic reaction groove relief outlet of being arranged on described electrolytic oxidation groove 4 and input aperture.
In the present embodiment, whipping appts is provided with in above-mentioned pH regulator groove 3; Be provided with electrolytic anode and electrolysis cathode in above-mentioned electrolytic oxidation groove 4, this electrolytic anode is DSA titanium plate, and electrolysis cathode is stainless steel plate, and this electrolytic oxidation groove 4 is the airtight electrolytic oxidation groove of stainless steel; Be provided with stirring rake in above-mentioned flocculation tank 6, this stirring rake adopts oar blade type stirring rake, frame type agitating blade or anchor formula stirring rake; Above-mentioned settling bath 7 is ramp type settling bath, vertical-flow settling bath or radial-flow type sedimentation groove; Above-mentioned isolation type multiphase balanced air floatation device 1 is also provided with intelligence and adds agent module, air supporting module and gas security protection module.
In addition, in the present embodiment, above-mentioned isolation type multiphase balanced air floatation device 1 can be isolation type multiphase balanced electric air floating device, and above-mentioned flocculation tank 6 can be electric flocculation tank.
Embodiment two:
Present embodiments provide a kind for the treatment of process of toxic volatile gases high-concentration industrial-water, this treatment process have employed the treatment system of the toxic volatile gases high-concentration industrial-water provided in embodiment one, this waste water is the alkaline sewage deriving from certain petro-chemical corporation, wherein, the concentration of COD is 51508mg/L, and the concentration of sulfide is 2570mg/L, the concentration of volatile phenol is 850mg/L, the concentration of petroleum-type is 1500mg/L, B/C value is 0.06, specifically comprises following processing step:
Step S1: be delivered to again after first waste water fully mix with coagulating agent in static mixer in isolation type multiphase balanced air floatation device 1, brings to the water surface by this isolation type multiphase balanced air floatation device 1 by the oils in waste water and insoluble organism and also removes and obtain the first process water and waste gas; The retention time of sewage t of waste water in this isolation type multiphase balanced air floatation device 1 1for 20min, the concentration of the COD now in the first process water is 45000mg/L, and the concentration of sulfide is 800mg/L, and the concentration of volatile phenol is 485mg/L, and the concentration of petroleum-type is 20mg/L, B/C value is 0.15;
Step S2: the waste gas obtained by above-mentioned steps S1 is qualified discharge after bleed rotational flow generator 2 processes;
Step S3: first, is delivered to the obtained by above-mentioned steps S1 first process water in pH regulator groove 3 and carries out pH value adjustment, and the pH value of this first process water is adjusted to 4; Secondly, the first process water after adjust ph is delivered in above-mentioned electrolytic oxidation groove 4 to carry out catalyzed oxidation to the organism in this first process water and to obtain the second process water; Again, the second process water to be delivered in neutralizing well 5 and to add alkali lye to regulate its pH value for 7, obtaining the 3rd process water; 3rd process water is delivered in flocculation tank 6, in flocculation tank 6, adds flocculation agent make the 3rd process water fully mix with flocculation agent and be delivered to settling bath 7, to be got off and to obtain mud and satisfactory discharge water by the contamination precipitation in the 3rd process water; Finally, folded spiral shell water extracter is adopted to dewater to the mud obtained.
In the present embodiment, above-mentioned flocculation agent is PAFS, ferric sulfate, aluminium iron polychloride or polymeric flocculant.Stir to improve rate of mass transfer to the 3rd process water by stirring rake in the flocculation process of above-mentioned steps S3, intensified response effect.
In above-mentioned steps S3, above-mentioned first processes water in two-phase cycle catalytic oxidizing equipment in 37 ocatalyzed oxidation is carried out when C, a standard atmospheric pressure, and the first hydraulic detention time t of process water in this two-phase cycle catalytic oxidizing equipment 2be 1 ~ 2h, specifically can be 1h, 1.5h or 2h, and make Fe 2+with H 2o 2mol ratio be 1:3.
The COD concentration of the water outlet of waste water after step S1, S2 and S3 process is 3500mg/L, and the concentration of sulfide is 15mg/L, and the concentration of volatile phenol is 105mg/L, and the concentration of petroleum-type is 10mg/L, B/C value is 0.35.
Embodiment three:
Present embodiments provide a kind for the treatment of process of toxic volatile gases high-concentration industrial-water, this treatment process have employed the treatment system of the toxic volatile gases high-concentration industrial-water provided in embodiment one, this waste water is the waste water deriving from Coal Chemical Industry coke-oven plant, wherein, the concentration of COD is 50000mg/L, and the concentration of volatile phenol is 5000mg/L, and the concentration of petroleum-type is 5000mg/L, B/C value is 0.10, specifically comprises following processing step:
Step S1: be delivered to again after first waste water fully mix with coagulating agent in static mixer in isolation type multiphase balanced air floatation device 1, brings to the water surface by this isolation type multiphase balanced air floatation device 1 by the oils in waste water and insoluble organism and also removes and obtain the first process water and waste gas; The retention time of sewage t of waste water in this isolation type multiphase balanced air floatation device 1 1for 15min, now, in the first process water, the concentration of COD is 42000mg/L, and the concentration of volatile phenol is 400mg/L, and the concentration of petroleum-type is 450mg/L, B/C value is 0.15;
Step S2: the waste gas obtained by above-mentioned steps S1 is qualified discharge after bleed rotational flow generator 2 processes;
Step S3: first, is delivered to the obtained by above-mentioned steps S1 first process water in pH regulator groove 3 and carries out pH value adjustment, and the pH value of this first process water is adjusted to 3; Secondly, the first process water after adjust ph is delivered in above-mentioned electrolytic oxidation groove 4 to carry out catalyzed oxidation to the organism in this first process water and to obtain the second process water; Again, the second process water to be delivered in neutralizing well 5 and to add alkali lye to regulate its pH value for 8, obtaining the 3rd process water; 3rd process water is delivered in flocculation tank 6, in flocculation tank 6, adds flocculation agent make the 3rd process water fully mix with flocculation agent and be delivered to settling bath 7, to be got off and to obtain mud and satisfactory discharge water by the contamination precipitation in the 3rd process water; Finally, folded spiral shell water extracter is adopted to dewater to the mud obtained.
In the present embodiment, above-mentioned flocculation agent is PAFS, ferric sulfate, aluminium iron polychloride or polymeric flocculant.Stir to improve rate of mass transfer to the 3rd process water by stirring rake in the flocculation process of above-mentioned steps S3, intensified response effect.
In above-mentioned steps S3, above-mentioned first processes water in two-phase cycle catalytic oxidizing equipment in 50 ocatalyzed oxidation is carried out when C, a standard atmospheric pressure, and the first hydraulic detention time t of process water in this two-phase cycle catalytic oxidizing equipment 2be 0.6 ~ 2.5h, specifically can be 0.6h, 0.9h, 1.2h, 1.8h or 2.5h, and make Fe 2+with H 2o 2mol ratio be 1:5.
The COD concentration of the water outlet of waste water after step S1, S2 and S3 process is 2850mg/L, and the concentration of volatile phenol is 80mg/L, and the concentration of petroleum-type is 25mg/L, B/C value is 0.38.
Embodiment four:
Present embodiments provide a kind for the treatment of process of toxic volatile gases high-concentration industrial-water, this treatment process have employed the treatment system of the toxic volatile gases high-concentration industrial-water provided in embodiment one, this waste water is the alkaline sewage deriving from certain petro-chemical corporation, wherein, the concentration of COD is 49560mg/L, and the concentration of sulfide is 2170mg/L, the concentration of volatile phenol is 790mg/L, the concentration of petroleum-type is 1300mg/L, B/C value is 0.08, specifically comprises following processing step:
Step S1: be delivered to again after first waste water fully mix with coagulating agent in static mixer in isolation type multiphase balanced air floatation device 1, brings to the water surface by this isolation type multiphase balanced air floatation device 1 by the oils in waste water and insoluble organism and also removes and obtain the first process water and waste gas; The retention time of sewage t of waste water in this isolation type multiphase balanced air floatation device 1 1for 10min, now, the concentration of the COD in the first process water is 42000mg/L, and the concentration of sulfide is 780mg/L, and the concentration of volatile phenol is 420mg/L, and the concentration of petroleum-type is 110mg/L, B/C value is 0.14;
Step S2: the waste gas obtained by above-mentioned steps S1 is qualified discharge after bleed rotational flow generator 2 processes;
Step S3: first, is delivered to the obtained by above-mentioned steps S1 first process water in pH regulator groove 3 and carries out pH value adjustment, and the pH value of this first process water is adjusted to 3; Secondly, the first process water after adjust ph is delivered in above-mentioned electrolytic oxidation groove 4 to carry out catalyzed oxidation to the organism in this first process water and to obtain the second process water; Again, the second process water to be delivered in neutralizing well 5 and to add alkali lye to regulate its pH value for 9, obtaining the 3rd process water; 3rd process water is delivered in flocculation tank 6, in flocculation tank 6, adds flocculation agent make the 3rd process water fully mix with flocculation agent and be delivered to settling bath 7, to be got off and to obtain mud and satisfactory discharge water by the contamination precipitation in the 3rd process water; Finally, folded spiral shell water extracter is adopted to dewater to the mud obtained.
In the present embodiment, above-mentioned flocculation agent is PAFS, ferric sulfate, aluminium iron polychloride or polymeric flocculant.Stir to improve rate of mass transfer to the 3rd process water by stirring rake in the flocculation process of above-mentioned steps S3, intensified response effect.
In above-mentioned steps S3, above-mentioned first processes water in two-phase cycle catalytic oxidizing equipment in 45 ocatalyzed oxidation is carried out when C, a standard atmospheric pressure, and the first hydraulic detention time t of process water in this two-phase cycle catalytic oxidizing equipment 2be 2 ~ 3h, specifically can be 2h, 2.4h, 2.7h or 3h, and make Fe 2+with H 2o 2mol ratio be 1:4.
The COD concentration of the water outlet of waste water after step S1, S2 and S3 process is 3200mg/L, and the concentration of sulfide is 95mg/L, and the concentration of volatile phenol is 70mg/L, and the concentration of petroleum-type is 40mg/L, B/C value is 0.31.
Embodiment five:
Present embodiments provide a kind for the treatment of process of toxic volatile gases high-concentration industrial-water, this treatment process have employed the treatment system of the toxic volatile gases high-concentration industrial-water provided in embodiment one, this waste water is the waste water deriving from Coal Chemical Industry coke-oven plant, wherein, the concentration of COD is 55000mg/L, and the concentration of volatile phenol is 5635mg/L, and the concentration of petroleum-type is 5120mg/L, B/C value is 0.14, specifically comprises following processing step:
Step S1: be delivered to again after first waste water fully mix with coagulating agent in static mixer in isolation type multiphase balanced air floatation device 1, brings to the water surface by this isolation type multiphase balanced air floatation device 1 by the oils in waste water and insoluble organism and also removes and obtain the first process water and waste gas; The retention time of sewage t of waste water in this isolation type multiphase balanced air floatation device 1 1for 30min, now, in the first process water, the concentration of COD is 41000mg/L, and the concentration of volatile phenol is 450mg/L, and the concentration of petroleum-type is 530mg/L, B/C value is 0.20;
Step S2: the waste gas obtained by above-mentioned steps S1 is qualified discharge after bleed rotational flow generator 2 processes;
Step S3: first, is delivered to the obtained by above-mentioned steps S1 first process water in pH regulator groove 3 and carries out pH value adjustment, and the pH value of this first process water is adjusted to 5; Secondly, the first process water after adjust ph is delivered in above-mentioned electrolytic oxidation groove 4 to carry out catalyzed oxidation to the organism in this first process water and to obtain the second process water; Again, the second process water to be delivered in neutralizing well 5 and to add alkali lye to regulate its pH value for 6, obtaining the 3rd process water; 3rd process water is delivered in flocculation tank 6, in flocculation tank 6, adds flocculation agent make the 3rd process water fully mix with flocculation agent and be delivered to settling bath 7, to be got off and to obtain mud and satisfactory discharge water by the contamination precipitation in the 3rd process water; Finally, folded spiral shell water extracter is adopted to dewater to the mud obtained.
In the present embodiment, above-mentioned flocculation agent is PAFS, ferric sulfate, aluminium iron polychloride or polymeric flocculant.Stir to improve rate of mass transfer to the 3rd process water by stirring rake in the flocculation process of above-mentioned steps S3, intensified response effect.
In above-mentioned steps S3, above-mentioned first processes water in two-phase cycle catalytic oxidizing equipment in 30 ocatalyzed oxidation is carried out when C, a standard atmospheric pressure, and the first hydraulic detention time t of process water in this two-phase cycle catalytic oxidizing equipment 2be 1.5 ~ 3h, specifically can be 1.5h, 2.3h, 2.8h or 3h, and make Fe 2+with H 2o 2mol ratio be 1:1.
The COD concentration of the water outlet of waste water after step S1, S2 and S3 process is 2600mg/L, and the concentration of volatile phenol is 65mg/L, and the concentration of petroleum-type is 35mg/L, B/C value is 0.40.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.

Claims (9)

1. a treatment process for toxic volatile gases high-concentration industrial-water, is characterized in that, comprises following processing step:
Step S1: waste water is delivered to so that the oils in described waste water and insoluble organism are brought to the water surface in isolation type multiphase balanced air floatation device, and the oils of the water surface and insoluble organic matter removal will be brought to and obtain the first process water and waste gas;
Step S2: the waste gas qualified discharge after the process of bleed rotational flow generator obtained by described step S1;
Step S3: the obtained by described step S1 first process water is delivered in two-phase cycle catalytic oxidizing equipment to carry out catalyzed oxidation to the organism in described first process water and to obtain satisfactory discharge water.
2. the treatment process of toxic volatile gases high-concentration industrial-water according to claim 1, is characterized in that, in described step S1, and the retention time of sewage t of described waste water in isolation type multiphase balanced air floatation device 1be 10 ~ 30min.
3. the treatment process of toxic volatile gases high-concentration industrial-water according to claim 1, it is characterized in that, in described step S3, before catalyzed oxidation is carried out to the organism in described first process water, first pH value adjustment is carried out to described first process water, and the pH value of described first process water is adjusted to 3 ~ 5.
4. the treatment process of toxic volatile gases high-concentration industrial-water according to claim 3, it is characterized in that, in described step S3, after catalyzed oxidation is carried out to the organism in described first process water, obtain the second process water, and in described second process water, add alkali lye to regulate its pH value acquisition the 3rd process water.
5. the treatment process of toxic volatile gases high-concentration industrial-water according to claim 4, it is characterized in that, in described step S3, in described 3rd process water, add flocculation agent so that mud and satisfactory discharge water will be obtained under contamination precipitation wherein.
6. the treatment process of toxic volatile gases high-concentration industrial-water according to claim 5, is characterized in that, in described step S3, and the described first hydraulic detention time t of process water in two-phase cycle catalytic oxidizing equipment 2be 0.5 ~ 3h.
7. the treatment system for the treatment process of toxic volatile gases high-concentration industrial-water described in any one in claim 1 ~ 6, it is characterized in that, comprise isolation type multiphase balanced air floatation device, bleed rotational flow generator and two-phase cycle catalytic oxidizing equipment;
Described two-phase cycle catalytic oxidizing equipment comprises the pH regulator groove, electrolytic oxidation groove, neutralizing well, flocculation tank and the settling bath that are communicated with successively;
The waste gas delivery port of described isolation type multiphase balanced air floatation device is communicated with pH regulator groove with described bleed rotational flow generator respectively with process water output.
8. the treatment system of toxic volatile gases high-concentration industrial-water according to claim 7, it is characterized in that, described two-phase cycle catalytic oxidizing equipment also comprises electrolytic reaction groove, and between the described electrolytic reaction groove relief outlet that is arranged on described electrolytic oxidation groove and input aperture.
9. the treatment system of toxic volatile gases high-concentration industrial-water according to claim 7, is characterized in that, described settling bath is ramp type settling bath, vertical-flow settling bath or radial-flow type sedimentation groove.
CN201510570469.3A 2015-09-10 2015-09-10 Treatment technique and system of toxic-volatile-gas-containing high-concentration industrial wastewater CN105060583A (en)

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