CN206680323U - Oil-containing sewage treatment system - Google Patents

Oil-containing sewage treatment system Download PDF

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Publication number
CN206680323U
CN206680323U CN201720306921.XU CN201720306921U CN206680323U CN 206680323 U CN206680323 U CN 206680323U CN 201720306921 U CN201720306921 U CN 201720306921U CN 206680323 U CN206680323 U CN 206680323U
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oil
water
suspension
air
treatment system
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张艳芬
胡海龙
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Beijing Yanshan Xiangyu Environmental Protection Engineering Co Ltd
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Beijing Yanshan Xiangyu Environmental Protection Engineering Co Ltd
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Abstract

The utility model provides a kind of oil-containing sewage treatment system, belongs to oily waste water treatment field, and the system includes homogeneous adjusting means, oil removal sedimentation device, buffer unit, air-floating apparatus, secondary settling tank and the filter being sequentially communicated;Fluid, suspension and the COD in oil-polluted water can be effectively removed by pretreatment system for sewage provided by the utility model, meet water stabilization, do not carry a large amount of suspensions, to water quality characteristicses such as oil reservoir fanout free regions, to reach the water standard of reinjected water, there is the advantages of low small investment, administration fee, high treating effect.

Description

Oil-containing sewage treatment system
Technical field
Sewage treatment area is the utility model is related to, more particularly, to a kind of oil-containing sewage treatment system.
Background technology
Oil-polluted water is mainly oil field extracted water.Due to the popularization and application of water flooding recovery technology, cause the most of oil in China Field Produced Liquid water content is up to more than 90%.The pollution such as COD, BOD, petroleum-type, volatile phenol, sulfide in the recovered water of these outer rows Index exceedes the requirement of discharging standards, flows directly to mining area or river and causes seriously to pollute to surrounding environment.
The measures such as oil removal, filtering, re-injection again after processing is up to standard are mainly used to the processing method of oil-polluted water both at home and abroad Stratum.Oil field carries out water filling, and the underground that can be made up caused by after crude oil produces is in debt, keeps or improve formation pressure.Note in oil field Enter water, except requiring water abundance, outside economical rationality, it is necessary to meet water stabilization, do not carry a large amount of suspensions, to oil reservoir without wound The water quality characteristicses such as evil.It must reach related water standard, and this both slow down pollution, and had also reduced development cost.
But the quantum of output of oil-polluted water substantially exceeds water injection rate demand, it is necessary to it is discharged into environment, and conventional processes There is the problem of still higher in the suspension and COD of outer draining, to treat people's solution.
Utility model content
The purpose of this utility model is to provide a kind of oil-containing sewage treatment system, and the oil-containing sewage treatment system can have Effect removes fluid, suspension and the COD in oil-polluted water, meets water stabilization, does not carry a large amount of suspensions, to oil reservoir fanout free region Deng water quality characteristicses, to reach the water standard of reinjected water.
To achieve the above object, the utility model provides following technical scheme:
A kind of oil-containing sewage treatment system, including:
Homogeneous adjusting means, to remove partial suspended thing in oil-polluted water, COD;
Oil removal sedimentation device, with the homogeneous adjusting means pipeline communication, discharged to remove the homogeneous adjusting means Oil-polluted water in fluid, suspension, COD;
Buffer unit, it is connected with the oil removal sedimentation device, to remove the sewage of the oil removal sedimentation device discharge In suspension;
Air-floating apparatus, it is connected with the buffer unit, to remove in the oil-polluted water of the buffer unit discharge Water-soluble oil, suspension;
Secondary settling tank, connected with the air-floating apparatus, further to remove the suspension in sewage;
Filter, connected with the secondary settling tank, to remove dirty tiny particle in water suspension.
Further, the air-floating apparatus uses air flotation turbo, and its inlet connects with buffer unit liquid outlet, described Air-floating apparatus liquid outlet connects with the secondary settling tank.
Further, the filter includes first level filtering device, and it is connected with the secondary settling tank.
Further, the filter also includes two-stage filter, and two-stage filter fills with the by-pass filtration Liquid outlet connection is put, the liquid outlet of the two-stage filter connects with fluid reservoir.
Further, in addition to scum silica frost pond, the scum silica frost pond respectively with homogeneous adjusting means, oil removal sedimentation device, buffering Device, air-floating apparatus are connected with the slag-drip opening of secondary settling tank.
Further, in addition to centrifuge, the centrifuge connects with the scum silica frost pond, to the dirt discharged to scum silica frost pond Mud carries out centrifugal dehydration.
Further, in addition to chemicals dosing plant, the chemicals dosing plant is to oil removal sedimentation device and air-floating apparatus conveying Medicament.
In pretreatment system for sewage provided by the utility model, homogeneous adjusting means, which can be removed in oil-polluted water, partly hangs Float, COD;Oil removal sedimentation device and homogeneous adjusting means pipeline communication, can remove containing for the homogeneous adjusting means discharge Fluid, suspension, COD in oily water;Buffer unit is connected with the oil removal sedimentation device, can remove the oil removal and sink Suspension in the sewage of falling unit discharge;Air-floating apparatus is connected with the buffer unit, can remove the buffer unit Water solubility oil, suspension in the oil-polluted water of discharge;Secondary settling tank connects with the air-floating apparatus, can further remove Suspension in sewage;Filter connects with the secondary settling tank, can further remove dirty tiny particle in water and suspend Thing.
In summary, the oil in oil-polluted water can be effectively removed by pretreatment system for sewage provided by the utility model Liquid, suspension and COD, meet water stabilization, do not carry a large amount of suspensions, to water quality characteristicses such as oil reservoir fanout free regions, to reach back The water standard of water filling.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation for the oil-containing sewage treatment system that the utility model embodiment provides;
Fig. 2 is the structural representation for the settling tank that the utility model embodiment provides;
Fig. 3 is the schematic diagram that sewage flows in the settling tank that the utility model embodiment provides;
Fig. 4 is the structural representation of division board in the settling tank that the utility model embodiment provides;
Fig. 5 is another structural representation for the settling tank that the utility model embodiment provides.
Reference:
100- tank bodies;110- one-levels decanting zone;111- first baffles;120- two levels decanting zone;121- second baffles;130- Three-level decanting zone;140- catchments;150- oil traps;160- manholes;170- guardrails;200- water inlet pipes;300- drainpipes;400- Oil exit pipe;500- discharge pipelines;600- honeycomb inclined-tube fillers;700- division boards;701- permeable holes.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality Novel protected scope.
It refer to Fig. 1;Oil-containing sewage treatment system provided by the utility model, including:
Homogeneous adjusting means, its effect is to remove partial suspended thing in oil-polluted water, COD;
Oil removal sedimentation device, with the homogeneous adjusting means pipeline communication, discharged to remove the homogeneous adjusting means Oil-polluted water in fluid, suspension, COD;
Buffer unit, it is connected with the oil removal sedimentation device, to remove the sewage of the oil removal sedimentation device discharge In suspension;
Air-floating apparatus, it is connected with the buffer unit, to remove in the oil-polluted water of the buffer unit discharge Water-soluble oil, suspension;
Secondary settling tank, connected with the air-floating apparatus, further to remove the suspension in sewage;
Filter, connected with the secondary settling tank, to remove dirty tiny particle in water suspension.
Each device in oil-containing sewage treatment system provided by the utility model is described in detail below:
In the present embodiment, for homogeneous adjusting means using homogeneous regulation tank, it is to remove partial suspended in oil-polluted water that it, which is acted on, Thing and COD, for oil-polluted water before homogeneous regulation tank is entered, pipeline sets flow regulator, and sets up pH value regulating measures, will Sewage PH value is transferred to suitable state, to ensure the effect of follow-up dosing flocculation.Meanwhile homogeneous regulation tank can stablize follow-up work The influent load of skill, it is ensured that the stable progress of whole oil-containing sewage treatment system, in the present embodiment, the homogeneous regulation tank that uses for Prior art, its structure repeat no more.
The oil removal sedimentation device that the present embodiment provides, preferably settling tank, the settling tank pass through sewage with homogeneous regulation tank Elevator pump is connected, and the oil extraction-generated waste water that sewage pump can adjust homogeneous after tank processing is delivered in settling tank.Adjusted in homogeneous Section tank water outlet add appropriate PAC (aluminium polychloride) and PAM (polyacrylamide), with remove partial suspended thing in settling tank, COD and oil-containing.
Refer to Fig. 2 and Fig. 3;The settling tank includes:Tank body 100, water inlet pipe 200, drainpipe 300, oil exit pipe 400 and row Mud pipe 500.
The one-level decanting zone 110 for being formed by barrier partitions and being sequentially communicated, two level decanting zone are provided with the tank body 100 120 and three-level decanting zone 130 and catchment 140, the one-level decanting zone 110, two level decanting zone 120 and three-level decanting zone 130 Inside be respectively arranged with to by the honeycomb inclined-tube filler 600 of current, the two level decanting zone 120 and three-level decanting zone 130 it Between formed with oil trap 150;
The water inlet pipe 200 is connected with the one-level decanting zone 110, is specifically provided in the upper position of tank body 100, with Upper area in one-level decanting zone 110 positioned at honeycomb inclined-tube filler 600 is connected, so that oil-polluted water can be oblique by honeycomb Tube packing 600 enters in the lower area of one-level decanting zone 110.
The discharge pipeline 500 is connected with one-level decanting zone 110, two level decanting zone 120 and three-level decanting zone 130 respectively, Discharge pipeline 500 is arranged on the bottom position of one-level decanting zone 110, two level decanting zone 120 and three-level decanting zone 130, so that deposition Sludge in above-mentioned each decanting zone bottom can be expelled in scum silica frost pond in time by pipeline.
The oil exit pipe 400 is connected with oil trap 150, into the oil-polluted water of two level decanting zone 120, due to each The density variation of composition (oil, water, suspension etc.) and separated, oil it is up, other sewage are descending under self gravitation effect, The fluid on upper strata can be flowed into oil trap 150, and is flowed out by oil exit pipe 400.
The drainpipe 300 is connected with the catchment 140, is set the sewage of catchment 140 is expelled into other It is standby to be reprocessed.
Accompanying drawing is refer to, along water inlet direction to the drainage direction of tank body 100 is followed successively by one-level decanting zone 110, two level settles Area 120, oil trap 150, three-level decanting zone 130 and catchment 140, utilize the energy of honeycomb inclined-tube filler 600 in multiple decanting zones It is enough that more sufficient separation is carried out to each composition of oil-polluted water, partial suspended thing and oil-containing are removed, is provided for subsequent treatment good Good condition.
The settling tank provided in the present embodiment, the suspension in the sewage can be increased using honeycomb inclined-tube filler 600 Probability is coalesced, the effect of settling of sludge can be improved, be advantageous to the removal of back segment suspension.Inclined tube is unlikely to deform simultaneously, is being recoiled Also it is easier during washing, adapts to the endurance for the impact load that the scope of different quality is big, is mutated to water quality, water By force, adaptability is good, is able to maintain that stable treatment effect.
As optimal technical scheme of the present utility model, honeycomb inclined-tube filler 600 is arranged to hexagon cellular inclined tube filler 600, there is Stability Analysis of Structures, the characteristics of impact resistance is high.
As optimal technical scheme of the present utility model, the honeycomb inclined-tube filler 600 is vacantly arranged on one-level and sunk respectively Drop in area 110, two level decanting zone 120 and three-level decanting zone 130, the honeycomb inclined-tube filler 600 in each decanting zone can pass through branch Frame is fixed on the inwall of tank body 100, or honeycomb inclined-tube filler 600 is fixed on the baffle plate of each decanting zone.
As optimal technical scheme of the present utility model, the honeycomb inclined-tube filler more than 600 in one-level decanting zone 110 Region is isolated by first baffle 111 and the two level decanting zone 120, so that the current of one-level decanting zone 110 can pass through After honeycomb inclined-tube filler 600 in the region, then flow into two level decanting zone 120.During specific setting, in one-level decanting zone 110 In honeycomb inclined-tube filler close to two level decanting zone 120 side set first baffle 111, first baffle 111 can be by one-level Top area in decanting zone 110 and two level decanting zone 120 positioned at honeycomb inclined-tube filler is isolated, and makes to enter adopting in tank body 100 Oily water can make a part of suspension in self gravitation effect first by the honeycomb inclined-tube filler in one-level decanting zone 110 Under be settled down to the bottom of one-level decanting zone 110 and be deposited into sludge, discharged via discharge pipeline 500.
As optimal technical scheme of the present utility model, positioned at honeycomb inclined-tube filler in two level decanting zone 120 below 600 Region is isolated by second baffle 121 and the one-level decanting zone 110, so that the current of one-level decanting zone 110 can detour The bottom of two level decanting zone 120 is flowed into the top of two level decanting zone 120, then through honeycomb inclined-tube filler 600 in two level decanting zone 120 Region.
During specific setting, the honeycomb inclined-tube filler in two level decanting zone 120 is set close to the side of one-level decanting zone 110 Second baffle 121, second baffle 121 can will be located at honeycomb inclined-tube filler in one-level decanting zone 110 and two level decanting zone 120 Lower region is isolated, and the oil extraction-generated waste water of the lower area of one-level decanting zone 110 is detoured to the top of two level decanting zone 120, is led to The honeycomb inclined-tube filler crossed in two level decanting zone 120, makes partial suspended thing be settled down to two level decanting zone under self gravitation effect 120 bottom is simultaneously deposited into sludge, is discharged via discharge pipeline 500.Simultaneously as the side of oil trap 150 and bottom are closed, Upper strata fluid in the region can be flowed into oil trap 150, and is expelled to by oil exit pipe 400 outside tank body 100.
It refer to Fig. 2-Fig. 4;As optimal technical scheme of the present utility model, honeycomb inclined-tube is filled out in two level decanting zone 120 The top of material 600 is provided with the division board 700 with permeable hole 701.Permeable hole 701 is evenly arranged on division board 700, division board 700 setting, suspension in the oil-polluted water in the region can be stopped, improve separating effect.
As optimal technical scheme of the present utility model, the top of the oil trap 150 be provided with permeable hole 701 every From plate 700.Similarly, permeable hole 701 is evenly arranged on division board 700, the setting of division board 700, can be to that will enter Suspension is stopped in the oil-polluted water of oil trap 150, improves separating effect.
As optimal technical scheme of the present utility model, the top of honeycomb inclined-tube filler 600 is set in the three-level decanting zone 130 It is equipped with the division board 700 with permeable hole 701.Similarly, permeable hole 701 is evenly arranged on division board 700, division board 700 Setting, suspension in the oil-polluted water in the region can be stopped, improve separating effect.
As optimal technical scheme of the present utility model, the top of catchment 140 is again provided with carrying permeable hole 701 Division board 700, its effect repeats no more.
As optimal technical scheme of the present utility model, the top of tank body 100 is respectively arranged with manhole 160, is easy to personnel Repaired or cleared up in into tank body 100.
It refer to Fig. 5;As optimal technical scheme of the present utility model, the top of the tank body 100 is fixed with guardrail 170, for protecting staff, cat ladder can also be set, be easy to climb.
Illustrate the settling tank operation principle that the utility model embodiment provides below:
Fig. 3 is refer to, wherein arrow is oriented to flow direction of the oil-polluted water in tank body.Oil-polluted water enters through water inlet pipe 200 Enter to the one-level decanting zone 110 in tank body 100, the current in one-level decanting zone 110 pass through the honeycomb inclined-tube in the region After filler 600, a part of suspension is settled down to the bottom of one-level decanting zone 110 under self gravitation effect and be deposited into dirt Mud, discharged via discharge pipeline 500, the sewage by initial gross separation detours to the top of two level decanting zone 120, passes through two level decanting zone Honeycomb inclined-tube filler 600 in 120, increases the coalescence probability of suspension, in the region, due to oil in oil-polluted water, water, outstanding The density variation of the compositions such as float and separated, oil it is up, other sewage are descending under self gravitation effect, make partial suspended Thing is settled down to the bottom of two level decanting zone 120 under self gravitation effect and is deposited into sludge, is discharged via discharge pipeline 500.Together When, because the side of oil trap 150 and bottom are closed, the upper strata fluid in the region can be flowed into oil trap 150, and It is expelled to by oil exit pipe 400 outside tank body 100, secondary separation is carried out to oil extraction-generated waste water.
Sewage in two level decanting zone 120 up and through during the honeycomb inclined-tube filler in three-level decanting zone 130, Suspension in sewage is settled three times, and honeycomb inclined-tube filler increases the coalescence probability of suspension, after settling three times Suspension the bottom of three-level decanting zone 130 is settled down under self gravitation effect and be deposited into sludge discharge;Up sewage Enter in catchment 140, be expelled to by drainpipe 300 in air-floating apparatus.
Referring once again to Fig. 1;Preferably, air-floating apparatus inlet connects with buffer unit liquid outlet, and air-floating apparatus goes out liquid Mouth connects with secondary settling tank, and the air-floating apparatus uses air flotation turbo, to contain greasy dirt to what is discharged through the buffer unit Water is handled, and the oil-polluted water in buffer unit can be specifically delivered in air-floating apparatus by air supporting elevator pump.
In this implementation, the purpose for setting air-floating apparatus is effective partial suspended thing removed in oil-polluted water and water solubility Oil, it is ensured that whole oily waste water treatment process is stable to be carried out.
When air-floating apparatus is specifically set, ripple swash plate group can be set in the separation chamber of air flotation turbo, make in sewage Finely divided oil and oil emulsion, it is easier to which coalescence is grown up, and is removed to greatest extent.The oily solids in sewage can simultaneously High-efficiency sedimentation separates.By Eddy concave air-floatation apparatus and it is interior set corrugated sheet group, fail the oil emulsion that is separated and other organic gels Matter, by flocculation reaction again, removed again into nanometer air supporting machine oil.
Buffer unit is preferably surge tank, and settling tank water outlet is overflowed in surge tank, and buffered tank removes a small amount of suspension, Water outlet adds appropriate PAC (aluminium polychloride) and PAM (polyacrylamide) to enter by air supporting elevator pump in air floatation machine, in air supporting Oil removal and water solubility oil are removed in machine.
In the technical scheme of the present embodiment, surge tank is the intermediate equipment for connecting settling tank and air floatation machine, mainly realizes two Individual effect, first, water storage function is provided for air supporting elevator pump, second, unprecipitated suspension can be in surge tank in settling tank Further precipitation, but because surge tank is the sleeping tank of flat rectangle, generally only 1 meter of its height is long 8.95 meters, wide 2.2 meters, if heavy It is higher that drop tank goes out aqueous suspension, and mud layer is higher in surge tank, under hydraulic blow effect, it is easy to stir mud layer, cause Go out aqueous suspension to increase.Surge tank is preferably increased 1 meter or so in the present embodiment, water-locator, increase are set in surge tank entrance Tank volume is buffered, improves the device residence time, reduces water impact.
Preferably, the filter includes first level filtering device, and it is connected with secondary settling tank's liquid outlet.
Preferably, the filter also includes two-stage filter, two-stage filter and the first level filtering device Liquid outlet connects, and the liquid outlet of the two-stage filter connects with fluid reservoir, and fluid reservoir is used to store treated water source, with It is easy to the water source carrying out re-injection.
The purpose for setting dual stage filter apparatus is further to remove the suspension of dirty tiny particle in water.
In oil-containing sewage treatment system provided by the utility model, in addition to scum silica frost pond, the scum silica frost pond respectively with homogeneous Adjusting means, oil removal sedimentation device, buffer unit, air-floating apparatus are connected with the slag-drip opening of secondary settling tank.
In oil-containing sewage treatment system provided by the utility model, in addition to centrifuge, the centrifuge and the scum silica frost Pond connects, and the sludge to be discharged to scum silica frost pond carries out centrifugal dehydration.In dehydration, a certain amount of PAM processing sludge is added, is made Final moisture percentage in sewage sludge is down to 80% by 99%.
In addition, in oil-containing sewage treatment system provided by the utility model, in addition to chemicals dosing plant, the chemicals dosing plant are used To convey medicament to oil removal sedimentation device and air-floating apparatus.
Oil-containing sewage treatment system provided by the utility model compared with prior art, has advantages below:
1st, by homogeneous adjusting means, oil removal sedimentation device, buffer unit, air-floating apparatus, secondary settling tank and filter The oil-containing sewage treatment system of composition, there is the advantages of low small investment, administration fee, high treating effect than prior art.
2nd, oil removal sedimentation device can increase the coalescence probability of the suspension in the sewage using honeycomb inclined-tube filler, can carry The effect of settling of high sludge, be advantageous to the removal of back segment suspension.Inclined tube is unlikely to deform simultaneously, is also compared in backwash process Easily, adapt to that the scope of different quality is big, strong to the endurance of water quality, the impact load of water mutation, adaptability is good, can Maintain stable treatment effect.
3rd, air-floating apparatus makes the finely divided oil and oil emulsion in sewage using air flotation turbo, by air flotation turbo, more Easily coalescence is grown up, and is removed to greatest extent.The oily solids in sewage being capable of high-efficiency sedimentation separation simultaneously.
Oil-contaminated water processing method based on said system comprises the following steps:
Step 100, the pH value of oil extraction-generated waste water is adjusted;
Step 200, using homogeneous adjusting means, to remove partial suspended thing in oil-polluted water, COD;
Step 300, the oil-polluted water handled through step 200 is delivered to oil removal sedimentation device, while adds PAC, PAM, leads to Dosing is crossed to change the electrochemical properties of dirty Organic substance in water, strengthens the tendency of flocculation of organic colloid, so that petroleum hydrocarbons, Suspension, organic colloid form appropriate alumen ustum, to remove the fluid in oil-polluted water, suspension, COD;
Step 400, the oil-polluted water handled through step 300 is delivered to buffer unit, further to remove in oil-polluted water Suspension;
Step 500, the oil-polluted water handled through step 400 is delivered to air-floating apparatus, while adds PAM, further to go Except water solubility oil, the suspension in oil-polluted water;
Step 600, the oil-polluted water handled through step 500 is delivered to secondary settling tank, further to remove oil-polluted water In suspension;
Step 700, the oil-polluted water handled through step 600 is delivered to filter, further to remove in oil-polluted water Molecule suspension.
Further, in the step 100, the pH value of oil extraction-generated waste water is adjusted to 6.5-8.5, to ensure the effect of dosing flocculation Fruit.
Using above-mentioned processing method, fluid, suspension and the COD in oil-polluted water can be effectively removed, meets that water quality is steady Determine, do not carry a large amount of suspensions, to water quality characteristicses such as oil reservoir fanout free regions, to reach the water standard of reinjected water.
Finally it should be noted that:Various embodiments above is only to illustrate the technical solution of the utility model, rather than it is limited System;Although utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should manage Solution:It can still modify to the technical scheme described in foregoing embodiments, either to which part or whole skills Art feature carries out equivalent substitution;And these modifications or replacement, the essence of appropriate technical solution is departed from the utility model The scope of each embodiment technical scheme.

Claims (7)

  1. A kind of 1. oil-containing sewage treatment system, it is characterised in that including:
    Homogeneous adjusting means, to remove partial suspended thing in oil-polluted water, COD;
    Oil removal sedimentation device, and the homogeneous adjusting means pipeline communication, to remove containing for the homogeneous adjusting means discharge Fluid, suspension, COD in oily water;
    Buffer unit, it is connected with the oil removal sedimentation device, to remove in the sewage of the oil removal sedimentation device discharge Suspension;
    Air-floating apparatus, it is connected with the buffer unit, it is water-soluble in the oil-polluted water of the buffer unit discharge to remove Property oil, suspension;
    Secondary settling tank, connected with the air-floating apparatus, further to remove the suspension in sewage;
    Filter, connected with the secondary settling tank, to remove dirty tiny particle in water suspension.
  2. 2. oil-containing sewage treatment system according to claim 1, it is characterised in that the air-floating apparatus uses cavitation air flotation Machine, its inlet connect with buffer unit liquid outlet, and the liquid outlet of the air-floating apparatus connects with the secondary settling tank.
  3. 3. oil-containing sewage treatment system according to claim 1, it is characterised in that the filter includes by-pass filtration Device, it is connected with the secondary settling tank.
  4. 4. oil-containing sewage treatment system according to claim 3, it is characterised in that the filter also includes two level mistake Device is filtered, two-stage filter connects with the first level filtering device liquid outlet, the liquid outlet of the two-stage filter and storage Flow container connects.
  5. 5. according to the oil-containing sewage treatment system described in claim any one of 1-4, it is characterised in that also including scum silica frost pond, institute State scum silica frost pond respectively with homogeneous adjusting means, oil removal sedimentation device, buffer unit, air-floating apparatus and the slag-drip opening of secondary settling tank It is connected.
  6. 6. oil-containing sewage treatment system according to claim 5, it is characterised in that also including centrifuge, the centrifuge Connected with the scum silica frost pond, the sludge to be discharged to scum silica frost pond carries out centrifugal dehydration.
  7. 7. according to the oil-containing sewage treatment system described in claim any one of 1-4, it is characterised in that also including chemicals dosing plant, The chemicals dosing plant to oil removal sedimentation device and air-floating apparatus conveying medicament.
CN201720306921.XU 2017-03-27 2017-03-27 Oil-containing sewage treatment system Active CN206680323U (en)

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Application Number Priority Date Filing Date Title
CN201720306921.XU CN206680323U (en) 2017-03-27 2017-03-27 Oil-containing sewage treatment system

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