CN103113003A - Complete equipment and process for processing coal tar wastewater - Google Patents
Complete equipment and process for processing coal tar wastewater Download PDFInfo
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- CN103113003A CN103113003A CN2013100752780A CN201310075278A CN103113003A CN 103113003 A CN103113003 A CN 103113003A CN 2013100752780 A CN2013100752780 A CN 2013100752780A CN 201310075278 A CN201310075278 A CN 201310075278A CN 103113003 A CN103113003 A CN 103113003A
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Abstract
The invention provides complete equipment and process for processing coal tar wastewater, and belongs to the technical field of environmental conservation. The process comprises the following steps of: adopting different removal principles according to different physicochemical properties of heavy oil, light oil and emulsified oil; scientifically and orderly removing the heavy oil, light oil and emulsified oil through three sets of environmental conservation equipment such as a multi-stage oil separator, an oil-water separator and an air floating tank gradually; combining a micro electrolysis reactor with a five-section integrated oxidization device; and firstly destroying a benzene ring by microelectrolysis, and then strongly oxidizing various organic matters through an oxidant, so that the COD (chemical oxygen demand) and the chromaticity are greatly reduced. Ammonia nitrogen can be efficiently removed by a denitrification system; the denitrification system is low on requirements of pH value and temperature, and low in operation cost; the denitrification system is arranged behind the five-section integrated oxidization device; the reaction change of power of hydrogen is fully considered; and the complete equipment complies with the scientific principle, and can be used for reducing feeding of acid and alkali, and lowering the operation cost.
Description
Technical field
The present invention relates to a kind of coal tar sewage disposal suite of equipment and technique, belong to environmental technology field.
Background technology
Coal tar sewage has six notable features: contain a large amount of heavy oil, light oil and oil in water emulsion 1..2. organic content is high.3. pollutant component is extremely complicated.Pollutent be mostly can not biochemical treatment material.5. colourity is dark.6. ammonia-nitrogen content is high.
Method for treating coal tar sewage is also many at present, the most frequently used treatment process is exactly " ammonia still process+A/O ", namely first carry out ammonia still process with vaporizing extract process, remained ammonia about ammonia nitrogen concentration 4000-6000mg/l is dropped to about 300mg/l (if do not reach 300mg/l, just to dilute with clear water at double), and then continued access A/O technique is carried out biochemical treatment.The shortcoming of this treatment process is:
1, the ammonia nitrogen waste water of high density first must be carried out stripping (being commonly called as ammonia still process) with steam, the ammonia nitrogen concentration of former water is reduced.And ammonia still process ammonia still used is not only invested greatly (hundreds of thousands of, millions of at most at least), and running cost is high, and only steam cost is processed waste water per ton and made and want 200 yuan of left and right (steam consumption quantity of one ton of waste water is about 200-300kg.Even if existing newly-invented ammonia still process technology, the steam that remained ammonia per ton consumes is still up to 120-150kg, and concentration also can only drop to 300mg/l from 4000-6000mg/l).
2, the A/O method requires harsh to flow condition.It not only requires the influent ammonia nitrogen value below 300mg/l, in fact really will guarantee the bio-chemical effluent stably reaching standard, and actual influent ammonia nitrogen value must be in the 100mg/l left and right, and COD also must be below 1000mg/l.Coking chemical waste water is the waste water of a kind of high ammonia nitrogen and high COD, after completing the coke chemicals recovery such as tar, crude benzol and phenol, naphthalene, former water COD is still up to 5000-10000mg/l, reach the following requirement of 1000mg/l, often need to dilute with the clear water of several times, its consequence is: (1) cost of investment is multiplied; (2) floor space enlarges at double; (3) construction period extends at double; (4) running cost significantly improves.
In addition, because the A/O method is also very strict to the requirement of operational condition (carbon, nitrogen, phosphorus ratio and water temperature), to the sensitive of natural condition (as temperature), especially northern area.So process the coking distilled ammonia wastewater with the A/O method, water outlet can not be accomplished stably reaching standard.
The method of industrial treatment high-concentration ammonia nitrogenous wastewater also has following several:
(1) blow-off method
Comprise steam blow-off method and air stripping method, its mechanism is that ammonia nitrogen in high density changes free ammonia under alkaline condition, is blown to gas phase by gas by liquid phase and the method for separating.No matter be steam stripping (vaporizing extract process) or air stripping (blow-off method), its ammonia nitrogen removal efficient is all lower comparatively speaking, especially concerning the ammonia nitrogen waste water of high density and ultrahigh concentration, the water outlet after it is processed does not all reach owner's requirement far away.And the stripping cost of these two kinds of forms is all very high.
(2) ion exchange method
Ion-exchange refers on the interface of solid particulate and liquid, ion exchange process occur.General zeolite or other resins of adopting of ion exchange method as inorganic ion exchanger more, and they are to NH4
+Very strong selection is arranged.But ion exchange method is only applicable to the ammonia nitrogen waste water of middle lower concentration, and is at all helpless for the ammonia nitrogen waste water of high density and ultrahigh concentration.
(3) break point chlorination
Break point chlorination is that chlorine and ammonia react generate nitrogen except the mechanism of ammonia, and whole reaction is as follows:
NH4
++1.5HOCl→0.5N
2↑+1.5H
2O+2.5H
++1.5Cl
-
The chlorination process treatment effect is stable, is not subjected to Water Temperature, invests lessly, but working cost is high, and by product chloramines and chlorinatedorganic can cause secondary pollution.Chlorination process is only applicable to process Low Concentration Ammonia Containing Wastewater.
Summary of the invention
Shortcoming for above-mentioned existing treatment technology, the present invention finds out the reluctant the very crux of this sewage according to the characteristics of coal tar sewage, and the complete treatment facility of combination and the technique of a whole set of scientific order is provided, both can guarantee qualified discharge, and running cost is relatively cheap.
For achieving the above object, this technical scheme that adopts of equipment is as follows:
Coal tar sewage disposal suite of equipment, multistage oil trap, water-and-oil separator are connected with air flotation pool and are connected, and are provided with lift pump between water-and-oil separator and air flotation pool; Described air flotation pool is connected the pond with water outlet and is connected successively with comprehensive adjustment pond, micro-electrolysis reactor, oxidation unit, denitrification system, flocculation sedimentation tank, intermediate pool, hydrolysis acidification pool, A/O process pool, secondary flocculation sedimentation tank, quartz sand filtration tank, absorbent charcoal adsorption tank, between comprehensive adjustment pond and micro-electrolysis reactor, between denitrification system and flocculation sedimentation tank, between A/O process pool and secondary flocculation sedimentation tank, be provided with lift pump between secondary flocculation sedimentation tank and quartz sand filtration tank, be provided with backwashing pump between absorbent charcoal adsorption tank and water outlet monitoring pond; Described oxidation unit, denitrification system, flocculation sedimentation tank, intermediate pool and secondary flocculation sedimentation tank all are connected to sludge thickener, and described sludge thickener is connected with sludge filter press by pump.
Because the chemical engineering sewage intractability is large, quartz sand and activated charcoal filter have been added after biochemical treatment, with further raising wastewater treatment efficiency.
Wherein, oxidation unit used is five sections integrated oxidization devices, and concrete structure is: inside is provided with stirring system and pH value automatic monitoring system, and it is externally connected to acid adding and adds alkali system, medicine system and blower fan; The device bottom is evenly arranged the aeration pipe network, and the aeration pipe network is connected with outside described blower fan; Device top hangs reducing motor and stirring rake by channel-section steel; The probe of pH value automatic monitoring system is placed on the bosom place of device, and is connected with the PLC electrical control system.
The present invention utilizes the technique of above-mentioned coal tar sewage disposal suite of equipment, comprises the steps:
(1) at first coal tar sewage enter multistage oil trap by ad hoc pipe network, utilize physics oil removal mode to isolate removal light oil, the composition of heavy oil and oil in water emulsion, utilize oil skimming machinery to remove grease, the water outlet of multistage oil trap enters collects the pond, pass through the one-level lift pump to water-and-oil separator after aeration agitation is even, the water outlet gravity flow of water-and-oil separator enters air flotation pool, by adding assistant medicament, further remove oil in water emulsion and other greasy dirt composition of sewage in air flotation pool, avoid the subsequent disposal unit is caused overload, the water outlet of air flotation pool is from flowing to the comprehensive adjustment pond, (2) converge in the comprehensive adjustment pond through multistage oil trap pretreated coal tar sewage and other wash-down waters after, pass through the one-level lift pump to micro-electrolysis reactor after aeration agitation is even, chain rupture becomes the short chain organic substance to long-chain in sewage with the loop chain organic substance, the part material is reduced, certainly flow to oxidation unit through the water outlet after above-mentioned processing, the required step of oxidizing reaction is all progressively completed in this pond: at first add acid for adjusting pH value, for follow-up catalytic oxidation treatment creates conditions, mix up sewage after pH by adding oxygenant and under the effect of catalyzer, a large amount of pollutents of removing sewage, under the effect of pneumatic blending, chain rupture becomes the short chain organic substance to long-chain in sewage with the loop chain organic substance, perhaps reach mineralising, increase substantially the biochemical of waste water in organic content in reducing waste water, (3) because the ammonia-nitrogen content in sewage is higher, need to remove separately ammonia nitrogen, sewage is promoted to denitrification system through the two-stage hoisting pump, in this system, by adding the special agent of removing ammonia nitrogen, and in certain temperature range, remove ammonia nitrogen composition in sewage in the stripping mode, water outlet after treatment is from flowing to intermediate pool one, be promoted to flocculation sedimentation tank by the level Four lift pump, regulate pH to 7～8 by adding sulfuric acid with the flocculation coagulating agent again, then realize solid-liquid separation by the natural sedimentation mode, supernatant liquor after precipitation is from flowing to intermediate pool two, wait for follow-up biochemical treatment, (4) sewage of processing through denitrification system enters intermediate pool two, by lift pump, composite wastewater is promoted to hydrolysis acidification pool, under anaerobic, utilizes the various pollution substances in the further degrading waste water of microorganism in anaerobic sludge, the hydrolysis acidification pool water outlet enters the A/O process pool, and sewage is proceeded aerobic treatment in the A/O process pool, and the residue organic pollutant is removed comparatively thoroughly, (5) water outlet after the A/O art breading is from flowing to the secondary flocculation sedimentation tank, after adding appropriate pharmacy response, sewage is carried out coagulating, the water outlet gravity flow that reaction is completed enters settling tank, the supernatant liquor of precipitation is from flowing to intermediate pool three, enter successively quartz filter and active carbon adsorber by the water outlet lift pump again, filter and adsorption treatment, after processing, water outlet gets final product qualified discharge.
Above-mentioned technique is according to heavy oil, light oil, the different physico-chemical property of oil in water emulsion, adopt different removal principles, heavy oil, light oil and oil in water emulsion are progressively removed by multistage oil trap, water-and-oil separator and three environmental protection equipments of air flotation pool in scientific order ground, farthest accomplish the oil recovery utilization.Whether the effective removal of grease has determined the possibility of sewage disposal.Micro-electrolysis reactor and five sections integrated oxidization devices are made up, farthest the benzene class material of hard degradation decomposed, ultimate principle is, first by little electrolyte destruction phenyl ring, and then by further strong each type organic of oxidation of oxygenant, make COD, colourity greatly descend, and considered especially the variation of potential of hydrogen, precisely control the variation of pH, make pH meet the optimum response scope of each unit, need not acid adjustment repeatedly and transfer alkali, both reduced workload, the generation of reduce mud again, thereby reduce mud disposal costs.Denitrification system can efficiently be removed ammonia nitrogen, and is not high to pH value and temperature requirement, and running cost is low, denitrification system is placed on five sections integrated oxidization device back, has also taken into full account the reactions change of potential of hydrogen, comply with the principles of science, reduce soda acid and add, reduce running cost.
Compared with prior art, the present invention has the following advantages:
1, (acidication+A/O) carry out complete combination can be guaranteed coal tar sewage stably reaching standard for integrated artistic employing strong materialization (repeatedly oil removal+little electrolysis+catalyzed oxidation+denitrogenation) and biochemistry.This point is that existing other technologies are beyond one's reach.
2, pay the utmost attention to the recovery of grease, meet the theory of recycling economy, oil recovery thoroughly not only is conducive to follow-up sewage disposal, and more enterprise farthest creates economic worth.
3, ammonia nitrogen removal definite effect, and less demanding to basicity and temperature, so running cost is very low, this is that other any techniques can't match in excellence or beauty.In addition, the ammonia that produces in nitrogen nitrogen removal process also can reclaim, and continues to create economic worth.
4, take into full account variation and the optimum response scope of potential of hydrogen, in an orderly manner micro-electrolysis reactor, five sections integrated oxidization devices and denitrification system three are made up, have complementary advantages, removal effect is high, the amount of lightening one's labor, the generation of reduce mud simultaneously, reduce mud is disposed and is taken.
5, complete set technology is compared other technique, and management is simple.
Description of drawings
Fig. 1 is the schema for the treatment of process of the present invention.
Fig. 2 is the structure iron of micro-electrolysis reactor.
Fig. 3 is the structure iron of five sections integrated oxidization devices.
Embodiment
With reference to accompanying drawing, treatment process of the present invention unit is elaborated.
One, preprocessing part
1. oil trap (multistage)
Function: oil trap is to utilize the difference of specific gravity of oil and water, separates a kind of processing structures of removing the suspension oil that in sewage, particle is larger.
Design variable: design useful volume: 48.0m
3Hydraulic detention time (HRT): 6.0h.Structures dead size: L * B * H=3000 * 12000 * 2500 (mm), available depth 1.4m.Structure formation: underground type steel and concrete structure (pool wall rotproofing).Quantity: 1.
Supporting major equipment: oil skimming machine: nonstandard designing and producing, quantity 2 covers.Oil drain pump: Q=10m
3/ h, H=10m, N=1.5kw, 2 of quantity (standby).
2. comprehensive adjustment pond
During plant produced, there is ununiformity in sewage discharge, causes the unbalanced of water quality and quantity, therefore equalizing tank need be set, and sewage is carried out the adjusting of water quality and quantity, avoids as far as possible sewage treatment facility is produced the impact of overload load.
The water yield to sewage is regulated, and keeping system is processed the relative stability of the water yield; Next has precipitating action, contains a certain amount of less solid substance in sewage, and precipitation is exactly to utilize gravity settling that the small-particle heavier than water removed from water; To play the acidication effect at last, often have a large amount of long-chain organism that is difficult to decompose in organic sewage, as polypeptide protein, Mierocrystalline cellulose, utilize anaerobism, the anoxic bacteria of suspension in the pond these material decomposition to be become the small organic molecule matter of short chain, improve B/C ratio its biochemical is improved, be convenient to postorder and process.
Design variable: design useful volume: 240.0m
3Hydraulic detention time (HRT): 24.0h.Structures dead size: L * B * H=10000 * 8000 * 4500 (mm), available depth 3.0m.Structure formation: underground type steel and concrete structure (rotproofing).Quantity: 1.
Supporting major equipment: three grades of lift pumps: 2 of quantity (standby), Q=15m
3/ h, H=10m, N=1.5kw.Magnetic flow meter: quantity 1 cover; Model: 65L-T.Liquid level control gage: quantity 1 cover; Model: HTK-2.
3. water-and-oil separator and air flotation pool
Comprehensive water-and-oil separator comprises air-flotation system and oil-water separator two cover systems, integrated treatment unit, supporting with compositions such as chemicals dosing plant, reaction unit, dregs of fat collection device, cavitation pump, electric heating systems, can realize the comprehensive treating process to heavy oil, lightweight oil, emulsification wet goods grease.
Oily water separating plant adopts gravity separation, swash plate to separate and two-stage coarse combination treatment method, carry out oil and moisture from.This product can be processed light mineral oil, also can process full-bodied heavy fuel oil (HFO), and the various oily waters that are widely used in the industrial and mining enterprises such as inner hargour, harbour and oil, chemical industry, power station are processed.Utilize vacuum mode take into oily(waste)water, separate through the gravity separation mode the overwhelming majority is oily through the effect of ripple swash plate group.Water after separation enters coarse element group again, with the coalescent floating of fine particle oil ground, the water discharging after processing.Enter the sump oil case and be separated sump oil through automatic control of collection chamber, can realize oil recovery and recycling.
Air flotation pool as a unit of water treatment, is a kind of desirable equipment for separating liquid from solid, is suitable for partition density close to suspended substance and the grease of water.The air flotation pool principle of work:
To be the micro-bubble that utilizes high dispersing remove to adhere to pollutent in sewage as carrier to By Bubble-floating Method, makes its density float to the water surface on less than water, thereby realize the process of solid-liquid, liquid-liquid separation.Isolate a kind for the treatment of process of solid phase or insoluble oil droplet from water.By the relative pressure (being gauge pressure) that water is applied 0.2～0.3MPa, and pass into air, make air soluble in water, be state of saturation, and then this is contained the dissolved air water of saturated gas, by special decompression release system, suddenly with Pressure Drop to barometric point, the air in dissolved air water is discharged in a large number with the form of microbubble.These bubbles are attached on suspended substance or liquid particles, its density reduced and float to pond face and concentrated, then striking off by automatic Despumation device.Clear liquor gives off at the bottom of the pond, so just reaches the purpose of solid-liquid separation.In the air supporting process because the removal of suspended substance and vegetable and animals oils can make CODc in waste water
rConcentration significantly descends.
Design variable: model: LY-10 is selected in design; Quantity: 1 cover; Plant bulk: L * B * H=7500 * 2450 * 2900 (mm).Structure formation: ground type steel construction.
Supporting major equipment: electric heating system: quantity 1 cover, specification: nonstandard designing and producing.Oil extraction pulp pump: 1 of quantity, Q=16m
3/ h, H=10m, N=4.0kw.Automatic control box: quantity 1 cover, specification: nonstandard designing and producing.Equipment Foundations: quantity 1 cover; Dead size 10000 * 4000 (mm).2, stirrer, slag scraper 1 cover automatically.Administration device: 2, nonstandard designing and producing.Dosing pump: 2 of quantity, specification OD-50.
4. micro-electrolysis reactor
Function: little electrolysis is to utilize to exist potential difference between iron-carbon granule and formed numerous trickle galvanic cell, thus the removal colourity that obtains expecting, the purpose of B/C ratio of improving.
Design variable: model: DJ-10 main body all steel material, internal and external anti-corrosive is processed, quantity 1 cover.Equipment Foundations: dead size: 6000 * 6000 (mm).
By the stacking mode, iron carbon filler 1 is housed inside this reactor.Water-in 2 is in the bottom, and water outlet 3 is on top.Bottom inlet mouth 4 overlaps the blower fan connection by pipeline with being connected.
Main support equipment: new packing: spherical or annular iron carbon filler, quantity 30m
3The pipeline mixer: 1, steel corrosion is processed, nonstandard designing and producing.Administration device: 2, nonstandard designing and producing.Dosing pump: 2 of quantity, specification OD-50.
5. five sections integrated oxidization devices
Function: chemical oxidation refers to utilize the little pollutent of strong oxidizer oxygenolysis sewage to reach the way that purifies water, and by chemical oxidation, the oxidation operation in sewage is decomposed, thereby reduces the COD value in sewage.In chemical reaction, atom or ion lose electronics and are called oxidation, receive electronics and are called reduction.The material that obtains electronics is called oxygenant, and the material that loses electronics is called reductive agent.The strong oxidizer that uses in the present invention is Fenton reagent, and this reagent is to utilize ferrous ion (Fe
2+) as hydrogen peroxide (H
2O
2) catalyzer, make it to decompose the hydroxyl radical free radical that produces high reactivity, high oxidative capacity, come the organic pollutant in oxidized waste water, organic pollutant is oxidized to carbonic acid gas and water.The appropriate pH scope of Fenton chemical oxidation is 3～4, and the hydrogen-oxygen hydroxyl radical free radical (OH) that produces has extremely strong oxidation capacity, and its oxidizing potential is high, is only second to fluorine in all oxygenants, arranges second.The Fe (OH) that simultaneous reactions generates
3Have stronger flocculating settling effect, oil of mirbane and the aniline waste water of difficult degradation had good treatment effect.
Fenton reagent is by H
2O
2And Fe
2+The mixed system that forms.It passes through catalyzing and decomposing H
2O
2Produce OH oxidation of organic compounds molecule, especially big molecule organic matter degradation is small molecules, or mineralising is CO
2And H
2The inorganicss such as O.Catalytic oxidation technique has adaptability very widely at sewage treatment area, especially is applicable to the larger chemical engineering sewage of difficulty and processes.
Design variable: design useful volume: 168.0m
3Hydraulic detention time (HRT): 16.8h.Structures dead size: L * B * H=7000 * 6000 * 4500 (mm), available depth 4.0m.Structure formation: half ground type steel and concrete structure (the pond inwall needs rotproofing).Quantity: 1.
Supporting major equipment: equipment body is connected with outside quadruplet administration system by dispensing pipeline 5, also is connected with blower fan 6, and inside is furnished with aerating system, the unsettled installation agitator motor in top, pond and whipping appts 7.
Adding of agent system: quantity 4 covers, specification: nonstandard designing and producing.Medicament configuration-system: quantity 1 cover, specification: nonstandard designing and producing.The adding of agent pump: 6, model: OD-50.The drug delivery pump: 1, Q=15m
3/ h, H=10m, N=1.5kw.PH Controlling System: quantity 2 covers; Model: GPP03.Electrically operated valve: 2 of quantity, model: DN80.The mechanical stirring system: 3, specification: nonstandard designing and producing.The PE carbon steel is anticorrosion.Water distribution system: nonstandard designing and producing, UPVC material, quantity 1 cover.Tube settling system: PE-50, quantity 18.0m
3Inclined-tube support: nonstandard designing and producing, the anticorrosion material of carbon steel, quantity 1 cover.Water outlet weir plate gathering system: nonstandard designing and producing, PVC material, quantity 1 cover.
6. denitrification system
Function: use the high efficiency composition denitrfying agent, contain a large amount of O, H, OH, CH, CH
2Deng atom and ionic activity group, can easily ammonium salt and other organic amines be changed into free ammonia to greatest extent in patent equipment Off nitrogen tower under katalysis, and the free ammonia of conversion is separated with waste water fast and fully, realize that ammonia reclaims.
Why nitric efficiency is low for traditional blow-off method or vaporizing extract process, major cause has three: the one, because it only has simple physical action and without chemical action, thereby the ammonium of ionic state all can not be converted into the ammonia of molecular state, more impossible organonitrogen is changed into ammonia-state nitrogen; The 2nd, can not destroy the powerful bonding force between amino molecule and water molecules, break in conjunction with the hydrogen bond between amino molecule and water molecules; The 3rd, traditional stripping or vaporizing extract process although gas-water ratio and energy consumption are surprisingly high, but can not be controlled the contact reacts time of empty G﹠W.
Use the high efficiency composition denitrfying agent, under the katalysis of biological activity katalaze enzyme, can almost absolutely the ammonium salt in waste water be changed into ammonia (volatilization ammonia, free ammonia), and whole hydrogen bonds that break easily under the cooperation of relevant device (ammonia separate reactor, high efficiency composition denitrification column), thereby lay a solid foundation for the thorough separation of ammonia.And to the organonitrogen (as quinoline, acridine, carbazole, indoles, pyridine and prussiate, thiocyanide etc.) in some waste water (as coke-oven plant's remained ammonia), denitrfying agent can promote its ammonifying process effectively, organonitrogen is changed into ammonia-state nitrogen to greatest extent, then realize together that with other inorganic nitrogen ammonia is isolated removal.The ammonia that high-concentration ammonia nitrogenous wastewater is separated can water coolant, dilute sulphuric acid or dilute hydrochloric acid makes absorption agent, reclaims ammoniacal liquor, sulphur ammonium or ammonium chloride through the multi-stage, efficient absorption tower, realizes the resources circulation recycling, prevents secondary pollution; And to the ammonia nitrogen waste water of lower concentration, can directly the most ammonia-nitrogen redox in waste water be become harmless nitrogen by the component of adjusting denitrfying agent.
Utilize high-efficiency ammonia separating device denitrification column (groove), this tower is outside by roots blower of pipelining, a cover administration system.Bottom, pond installation perforated pipe aerating regulation system.The top, pond is the ammonia escape orifice.
After this tower height concentration ammonia nitrogen wastewater pumps into denitrification column (groove) by lift pump, physical action by the centrifugal high pressure fan aeration, add the chemical action of the denitrfying agent that simultaneous quantitative adds, the ammonia nitrogen in high density in waste water thoroughly can be removed, guarantee discharged wastewater met the national standard.
Denitrification column (groove) is compared with traditional environmental protection equipment stripping tower or ammonia still, all be very different to textural from mechanism, fundamental difference is that stripping tower or ammonia still section fail to solve the contact reacts matter of time of waste water and air, thereby they are all limited to the clearance of ammonia nitrogen in waste water.And patent environmental protection equipment denitrification column (groove) can design arbitrarily reaction time according to water quality condition and needs, thereby can guarantee that the ammonia that will be dissolved in waste water thoroughly separates.
Design variable: denitrification column model: ZTD-10 main body all steel material.Internal and external anti-corrosive is processed.Quantity 6 covers.Single complete equipment size: 3300 * 6500 * 1200 (mm) Equipment Foundations dead size: 10000 * 8000 (mm)
Main support equipment: aeration centrifugal blower: N=18.5kw, 6 of quantity.Line mixer: 1 of quantity, nonstandard designing and producing.Administration device: 4 covers, nonstandard designing and producing.Dosing pump: 4 of quantity, specification OD-90.
7. flocculation sedimentation tank
Function: by adding appropriate polymerize aluminum chloride and polyacrylamide, effectively remove the suspended substance in sewage.Sewage and medicament are after process is fully reacted, and the gravity flow primary sedimentation pond carries out the physics gravitational settling, and the flock after flocculation precipitates under action of gravity, realizes mud-water separation.
Design variable: design useful volume: 185.0m
3Structures size: L * B * H=5000 * 12000 * 4500 (mm), available depth 4.0m.Structure formation: semi-underground type steel and concrete structure.Quantity: 1.
Supporting major equipment: adding of agent system: quantity 5 covers, nonstandard designing and producing.Volume pump: 6, model: OD-50.PH Controlling System: quantity 1 cover; Model: GPP03.The mechanical stirring system: 2, specification: nonstandard designing and producing.The stirrer support: 2, specification: nonstandard designing and producing.Water distribution system: nonstandard designing and producing, PE material, quantity 1 cover.Tube settling system: PE-50, quantity 50.0m
3Inclined-tube support: nonstandard designing and producing, the anticorrosion material of carbon steel, quantity 1 cover.Water outlet weir plate gathering system: nonstandard designing and producing, PVC material, quantity 1 cover.Sludge drainage system: nonstandard designing and producing, quantity 1 cover.
Two, biochemical processing process part
1. acidication process pool
Function: under anaerobic, utilize the pollutent in the microbiological deterioration sewage in the anaerobic sludge of cultivating.
Design variable: design useful volume: 1000.0m
3Hydraulic detention time (HRT): 100.0h.Structures size: L * B * H=5000 * 5000 * 10500 (mm), available depth 10.0m.Structure formation: half ground type steel and concrete structure.Quantity: 4.
Supporting major equipment: temperature control system: nonstandard designing and producing, quantity 1 cover.Steam pipe system system: nonstandard designing and producing, steel corrosion, quantity 1 cover.Sludge drainage system: nonstandard making, quantity 4 covers.Recycle pump: 50GW10-10-0.75,2 of quantity.Tank level control system system: quantity 1 cover.Filler: 600.0m
3, specification Φ 150 elastic fillers.Filler support: nonstandard making, quantity 2 covers.Diving mixer: 4 of quantity, model: QJB-2.2.
2. A/O process pool
Function: in the A pond, utilize the lytic enzyme effect that solids is dissolved as dissolved matter, macromolecular substance is degraded to small-molecule substance, and recalcitrant substance is converted into the readily biodegradable material, improves simultaneously B/C than to improve the efficient of follow-up aerobic treatment.
In the O pond, under aerobic condition, utilize the pollutent in the microbiological deterioration sewage in the active sludge of cultivating.Adopt aerating system to fill to pending water and add enough oxygen, make aerobic bacteria can have that in enough oxygen utilization water, organism carries out metabolism, thereby make the pollutent in water become the harmless inorganicss such as carbonic acid gas and water.Provide suitable aeration rate according to liquid level change, guarantee the efficient stable operation of biochemical treatment section.Aerobic process most critical part is to keep activity and the coherency sedimentation function of active sludge (bacterial classification), one of characteristics of contact oxidation technology are to have installed to account for the high-effect biologic packing material that the pond holds 60% left and right in the pond, become the carrier that aerobic bacteria adheres to and multiplies, by the external fan aeration, make the microorganism that is attached to filling surface be present in whole pond body, thereby make sewage all in the pond all can effectively be processed, do not have the processing dead-time problem.Simultaneously the structure of contact-oxidation pool is optimized design, makes its basin's effective volume reach maximum.
A pond design variable: design useful volume: 240.0m
3HRT：6.0h。Structure formation: semi-underground type steel and concrete structure.Structures size: L * B * H=10000 * 5000 * 4500 (mm), available depth 4.0m.Quantity: 1.
Supporting major equipment: stirrer: QJB-260 under water, P=0.85kw, 2 covers.Mixed-liquor return pump: Q=40m
3/ h, H=10m, P=3.0kw, 2 of quantity.
O pond design variable: design useful volume: 720.0m
3HRT：18.0h。Structure formation: semi-underground type steel and concrete structure.Structures size: L * B * H=10000 * 18000 * 4500 (mm), available depth 4.0m.Quantity: 1.Volumetric loading: Ls=0.47kgBOD
5/ (m
3D); Sludge concentration: MLVSS=3000mg/L; Gas-water ratio: 12: 1.
Supporting major equipment: platy fine bubble aerator: Φ=260mm, 270 covers.Aeration fan: model: SZR-150, quantity: 3 (2 use 1 are standby).Aeration pipe network system: nonstandard making.Quantity 1 cover.Filler: 450m
3, specification Φ 150 combined stuffings.Filler support: 1 cover, nonstandard designing and producing, anticorrosion.
Design meter parameter: design useful volume: 175m
3Structures size: L * B * H=5000 * 10000 * 4500 (mm), available depth 3.5m.Structure formation: semi-underground type steel and concrete structure.Quantity: 1.
Supporting major equipment: water distribution system: nonstandard designing and producing, UPVC material, quantity 1 cover.Tube settling system: PE-50, quantity 50.0m
3Inclined-tube support: nonstandard designing and producing, the anticorrosion material of carbon steel, quantity 1 cover.Water outlet weir plate gathering system: nonstandard designing and producing, PVC material, quantity 1 cover.Sludge reflux system: nonstandard designing and producing, the anticorrosion material of carbon steel, quantity 1 cover.
3. second pond:
Cell descriptions: the process matched therewith as the A/O pond, precipitate excess sludge.
Design variable: design useful volume: 175m
3Structures size: L * B * H=5000 * 10000 * 4500 (mm), available depth 3.5m.Structure formation: semi-underground type steel and concrete structure.Quantity: 1.
Supporting major equipment: water distribution system: nonstandard designing and producing, UPVC material, quantity 1 cover.Tube settling system: PE-50, quantity 50.0m
3Inclined-tube support: nonstandard designing and producing, the anticorrosion material of carbon steel, quantity 1 cover.Water outlet weir plate gathering system: nonstandard designing and producing, PVC material, quantity 1 cover.Sludge reflux system: nonstandard designing and producing, the anticorrosion material of carbon steel, quantity 1 cover.
4. secondary flocculation sedimentation tank
Function: by adding appropriate relevant flocculation agent, effectively remove the suspended substance in sewage.Sewage and medicament are after process is fully reacted, and the gravity flow primary sedimentation pond carries out the physics gravitational settling, and the flock after flocculation precipitates under action of gravity, realizes mud-water separation.
Design variable: design useful volume: 185.0m
3Structures size: L * B * H=5000 * 12000 * 4500 (mm), available depth 4.0m.Structure formation: semi-underground type steel and concrete structure.Quantity: 1.
Supporting major equipment: adding of agent system: quantity 4 covers, nonstandard designing and producing.Volume pump: 4, model: OD-90.PH Controlling System: quantity 1 cover; Model: GPP03.The mechanical stirring system: 2, specification: nonstandard designing and producing.The stirrer support: 2, specification: nonstandard designing and producing.Water distribution system: nonstandard designing and producing, PE material, quantity 1 cover.Tube settling system: PE-50, quantity 50.0m
3Inclined-tube support: nonstandard designing and producing, the anticorrosion material of carbon steel, quantity 1 cover.Water outlet weir plate gathering system: nonstandard designing and producing, PVC material, quantity 1 cover.Sludge drainage system: nonstandard designing and producing, quantity 1 cover.
5. quartz filter and active carbon adsorber
Cell descriptions: to again carry out quartz sand filtration and the processing of charcoal absorption even depth through the water outlet after biochemical treatment and flocculation sediment, guarantee the effective qualified discharge of stable water outlet.
Support equipment: quartz filter: nonstandard making.Carbon steel material, quantity 2 covers.Absorbent charcoal adsorption tank: nonstandard making.Carbon steel material, quantity 2 covers.Backwashing pump system: auxiliary facility, quantity 1 cover.
6. sludge thickener and plate-and-frame filter press
Materialized mud to reaction settling basin is collected, is concentrated, press filtration is processed, the reduce mud volume.Utilize the sludge lifting pump that mud is pumped into sludge filter press and carry out the mud-water separation press filtration, pressure filtration yielding water enters collects the pond and processes, and mud cake is disposed specially as solid waste.
In addition, sewage carries out biochemical treatment, after Biodegradation and biotransformation, some organic pollutants participates in biochemical reaction and deposits in settling tank with the form of biological sludge in contact-oxidation pool, the mud of this part deposition is called excess sludge, need to regularly carry out spoil disposal, with the metabolism of microorganism and the stablizing for the treatment of effect that keeps biological treatment system.
Design variable: design useful volume: 60m
3Structures size: L * B * H=4000 * 4000 * 4500 (mm), available depth 4.0m.Structure formation: semi-underground type steel and concrete structure.Quantity: 2.
Supporting major equipment: chamber-type press filter: XMY30/630-UB, 2.Pneumatic diaphragm pump: QBY-40,2 of quantity.Air compressor: V-0.67,1 of quantity.Gas holder: nonstandard making.Carbon steel material, quantity 1 cover.The mechanical stirring system: 2 covers, the stirring rake material is 304 stainless steels.Rotating speed=20-30rpm, power=4.0kw.Adding of agent system: quantity 1 cover, nonstandard designing and producing.Volume pump: 2, model: OD-50.
Claims (3)
1. coal tar sewage disposal suite of equipment, is characterized in that, multistage oil trap, water-and-oil separator are connected with air flotation pool and are connected, and is provided with lift pump between water-and-oil separator and air flotation pool; Described air flotation pool is connected the pond with water outlet and is connected successively with comprehensive adjustment pond, micro-electrolysis reactor, oxidation unit, denitrification system, flocculation sedimentation tank, intermediate pool, hydrolysis acidification pool, A/O process pool, secondary flocculation sedimentation tank, quartz sand filtration tank, absorbent charcoal adsorption tank, between comprehensive adjustment pond and micro-electrolysis reactor, between denitrification system and flocculation sedimentation tank, between A/O process pool and secondary flocculation sedimentation tank, be provided with lift pump between secondary flocculation sedimentation tank and quartz sand filtration tank, be provided with backwashing pump between absorbent charcoal adsorption tank and water outlet monitoring pond; Described oxidation unit, denitrification system, flocculation sedimentation tank, intermediate pool and secondary flocculation sedimentation tank all are connected to sludge thickener, and described sludge thickener is connected with sludge filter press by pump.
2. coal tar sewage disposal suite of equipment according to claim 1, it is characterized in that, described oxidation unit adopts five sections integrated oxidization devices, concrete structure is: device inside is provided with stirring system and pH value automatic monitoring system, and it is externally connected to acid adding and adds alkali system, medicine system and blower fan; Described device bottom is evenly arranged the aeration pipe network, and the aeration pipe network is connected with outside described blower fan; Described device top hangs reducing motor and stirring rake by channel-section steel; The probe of described pH value automatic monitoring system is placed on the bosom place of device, and is connected with the PLC electrical control system.
3. utilize the technique of coal tar sewage disposal suite of equipment as claimed in claim 2, it is characterized in that, comprise the steps:
(1) at first coal tar sewage enter multistage oil trap by ad hoc pipe network, utilize physics oil removal mode to isolate removal light oil, the composition of heavy oil and oil in water emulsion, utilize oil skimming machinery to remove grease, the water outlet of multistage oil trap enters collects the pond, pass through the one-level lift pump to water-and-oil separator after aeration agitation is even, the water outlet gravity flow of water-and-oil separator enters air flotation pool, by adding assistant medicament, further remove oil in water emulsion and other greasy dirt composition of sewage in air flotation pool, avoid the subsequent disposal unit is caused overload, the water outlet of air flotation pool is from flowing to the comprehensive adjustment pond,
(2) converge in the comprehensive adjustment pond through multistage oil trap pretreated coal tar sewage and other wash-down waters after, pass through the one-level lift pump to micro-electrolysis reactor after aeration agitation is even, chain rupture becomes the short chain organic substance to long-chain in sewage with the loop chain organic substance, the part material is reduced, certainly flow to five sections integrated oxidization devices through the water outlet after above-mentioned processing, the required step of oxidizing reaction is all progressively completed in this pond: at first add acid for adjusting pH value, for follow-up catalytic oxidation treatment creates conditions, mix up sewage after pH by adding oxygenant and under the effect of catalyzer, a large amount of pollutents of removing sewage, under the effect of pneumatic blending, chain rupture becomes the short chain organic substance to long-chain in sewage with the loop chain organic substance, perhaps reach mineralising,
(3) because the ammonia-nitrogen content in sewage is higher, need to remove separately ammonia nitrogen, sewage is promoted to denitrification system through the two-stage hoisting pump, in this system, by adding the special agent of removing ammonia nitrogen, and in certain temperature range, remove ammonia nitrogen composition in sewage in the stripping mode, water outlet after treatment is promoted to flocculation sedimentation tank, regulate pH to 7～8 by adding sulfuric acid with the flocculation coagulating agent, then realize solid-liquid separation by the natural sedimentation mode, the supernatant liquor after precipitation is waited for follow-up biochemical treatment from flowing to intermediate pool;
(4) sewage of processing through denitrification system enters intermediate pool, by lift pump, composite wastewater is promoted to hydrolysis acidification pool, under anaerobic, utilizes the various pollution substances in the further degrading waste water of microorganism in anaerobic sludge; The hydrolysis acidification pool water outlet enters the A/O process pool, and sewage is proceeded aerobic treatment in the A/O process pool, and the residue organic pollutant is removed comparatively thoroughly;
(5) water outlet after the A/O art breading is from flowing to the secondary flocculation sedimentation tank, after adding appropriate pharmacy response, sewage is carried out coagulating, the water outlet gravity flow that reaction is completed enters settling tank, the supernatant liquor of precipitation is from flowing to intermediate pool, enter successively quartz filter and active carbon adsorber by the water outlet lift pump again, filter and adsorption treatment, after processing, water outlet gets final product qualified discharge.
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| CN2013100752780A CN103113003A (en) | 2013-03-11 | 2013-03-11 | Complete equipment and process for processing coal tar wastewater |
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Application publication date: 20130522 |