CN101486515A - Oily wastewater treatment method and whole set apparatus thereof - Google Patents
Oily wastewater treatment method and whole set apparatus thereof Download PDFInfo
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- CN101486515A CN101486515A CNA2009100250754A CN200910025075A CN101486515A CN 101486515 A CN101486515 A CN 101486515A CN A2009100250754 A CNA2009100250754 A CN A2009100250754A CN 200910025075 A CN200910025075 A CN 200910025075A CN 101486515 A CN101486515 A CN 101486515A
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Abstract
The invention pertains to the waste water processing technical field and relates to an oily waste water processing method and complete set of equipment thereof, which is characterized in that: firstly, the waste water is processed by an express pump and then transmitted to a steady flow cylinder by a distributor so as to be treated with demulsification and perikinetic flocculation; afterward, the waste water is transmitted to a mixing tank so as to be treated with orthokinetic flocculation; after being further charged by a high-pressure dissolved air releaser, oil-water separation is carried out to the waste water; and finally, clean water meeting the requirement of environmental protection can be obtained after the waste water is separated in an inclined tube settling zone. The processing method is characterized by simple process and equipment, low investment and low running cost.
Description
Technical field
The present invention relates to a kind of environment-protective process and equipment, especially oily(waste)water treatment process and equipment, specifically a kind of oily wastewater treatment method and complexes thereof.
Background technology
As everyone knows, various machinery manufacturing industry, iron and steel and other metal, petroleum refinement, petroleum chemistry, meat processing, vegetable oil production, leatheroid, leather waste water, paint, printing ink production all can produce a large amount of oily(waste)waters, the Cleaning Wastewater of transport facilitys such as boats and ships, vehicle, aircraft, engine etc. also can produce oily(waste)water, it is a kind of severe pollutant, must could discharge through handling.
Owing to differ in the source of waste water, the kind of oily(waste)water, concentration, characteristic are also different, and they generally exist in the waste water with water-in-oil and oil-in-water character, and oily(waste)water generally can be divided into substantially:
1. on the water surface, float the free state oil of oil film when static.
2. micron-sized oil droplet can by charge force and other power stable and the mechanical dispersion oil that not influenced by tensio-active agent.
3. oil, water termination are influenced and chemically stable oil in water emulsion (emulsion) by tensio-active agent.
4. the superfine differential of chemical dissolution looses and the solubilised state oil that can't remove with physical method.
5. be adsorbed in the solid absorption oil of solid particulate and other component surface in the waste water.
According to the difference of the kind of the oil of handling, treatment process and equipment commonly used at present mainly contain:
One, common grease sewage treatment equipment:
1. treatment effect is subjected to the restriction of temperature, and generally designing inflow temperature is 20 to 40 ℃;
2. during influent waste water oil length≤400mg/l, oil removal rate has only＜and 80%;
3. need electrically heated or steam heating during device processes waste water.Need add acid cleavage during breakdown of emulsion, water outlet adds alkali neutralization, running cost height.
(1) add acid, heat, the requirement of neutralization reaction jar material needs the 316L stainless steel, wastewater temperature need add to and just reach demulsification more than 65 ℃, energy consumption is big, the salt of neutralization back generation will influence the advanced treatment effect.
(2) volatile gases and salt will form secondary pollution.
(3) complex operation, acid, alkali accumulating and manual operation safety coefficient are low.
(4) cost of investment is big, working cost height, complex process.
4. use limitation big, equipment needs the polymeric flocculant breakdown of emulsion, and demulsification is affected by environment.As polyacrylamide etc., its molten medicine difficulty, dry powder is offerd medicine and agglomerating caking phenomenon occurred when inhomogeneous, and easily block pumps, valve, flow are taken into account pipeline, and medicament costs an arm and a leg the working cost height simultaneously.
Two, BSGY type automatic oily water separator
Advantage:
1. adopt the inclined plate grease technology, the separation efficiency height, floor space is little;
2. utilize the float oil removal, be used in the processing of boats and ships oil slick especially;
3. receive oil and deslagging automatically;
Shortcoming:
1. treatment effect is subjected to the restriction of temperature, and design temperature is 20-40 ℃;
2. during influent waste water oil length≤400mg/l, oil removal rate has only 85%;
3. need electrically heated or steam heating during device processes waste water;
4. use limitation big;
5. emulsion splitter costs an arm and a leg, complex operation;
6. need add acid cleavage during breakdown of emulsion, water outlet adds alkali neutralization, running cost height.
Three, profit waste water conventional treatment process
Wastewater equalization pond → pump → add acid is heated and is reacted → add alkali neutralization → sewage cooling tower → middle pond → air-floatation water purifier → water outlet
Advantage:
This technical maturity, deoiling effect is good, and use range is wide, and is not affected by environment.
Shortcoming and aforementioned device are roughly the same.
Four, inorganic ceramic ultra-filtration membrane device
Need to install PE PEC sintered pipes strainer
Advantage:
Collection filters, and sterilization is adsorbed as the filter plant of one, and the filtering accuracy height is corrosion-resistant, the nontoxicity shortcoming:
Oleaginousness≤the 15mg/l of water inlet, the concentration of suspended substance≤10mg/l pre-treatment requires high, and difficult the cleaning easily stopped up, the running cost height, use range is narrow.
Five, hydrocyclone
1. advantage
(1) simple in structure, inner no consumable accessory and filtrate, easy to use.
(2) function is many, uses different occasions as required.
(3) its energy parting liquid, liquid and liquid, gas, solid three phase separation.
2. shortcoming
(1) its stalling characteristic, efficient etc. are subjected to the influence of factors such as feed pressure and mixture character to a great extent.
Just be difficult to separate when (2) diameter of oil droplet is less than cut value when liquid, liquid separation.
(3) eddy current that separate to rely on liquid portion's rotation within it to be produced of the medium in the hydrocyclone makes the medium separation, liquid produces when rotated separates shear force, this shear force of separating can make flocs unit break, and makes other materials such as oil droplet become littler drop, has strengthened the running cost of later separation difficulty.
(4) poor processing effect of vegetables oil waste water is easily stopped up.
Six, air-floatation water purifier
What oily(waste)water was removed in air supporting has air-dissolving air-float, jet air float, turbine air flotation, electrofloatation and a cavitation air flotation etc.
1. equipment needs the polymeric flocculant breakdown of emulsion, and demulsification is affected by environment;
2. effect consumption is big, the working cost height;
3. use range is restricted;
4. enter oleaginousness 〉=500mg/L DeGrain;
5. directly handle, equipment need be used the moon or Yanggao County's molecular flocculant breakdown of emulsion, and demulsification is affected by environment.
(1) equipment needs the polymeric flocculant breakdown of emulsion, and demulsification is affected by environment.Add acid, heat, neutralization reaction jar material requires high, needs the 316L stainless steel, and wastewater temperature need add to reach about 900C abolishes effect, and energy consumption is big, and the salt that the neutralization back produces will influence the advanced treatment effect.
(2) volatile gases and salt have formed secondary pollution.
(3) complex operation, acid, alkali accumulating and manual operation safety coefficient are low.
(4) cost of investment is big, working cost height, complex process.
(5) DeGrain during oleaginousness 〉=500mg/l.
In sum, present all kinds of oil removing process all exist and have high input, and the operational path complexity need add acid and neutralize and could realize the isolating purpose of breakdown of emulsion, and separating effect is undesirable, and careless slightly should exceeding standard do not reach emission effect.In order to improve treatment effect, have to use polymeric flocculant in some industries, make processing cost high.
Therefore, be badly in need of a kind of cost of both having saved of invention, the method and apparatus based on mechanical treatment that can improve separating effect again replaces needing to add sour treatment process and equipment at present and solves the qualified discharge problem.
Summary of the invention
In the objective of the invention is to handle at existing oily(waste)water oily water separation mainly rely on heating, add acid, add processing cost height that polymeric flocculant and neutralization precipitation cause, facility investment height, problem that floor space is big, invent a kind of new oily wastewater treatment method, design a kind of brand-new complete treatment facility simultaneously.
Technical scheme of the present invention is:
A kind of oily wastewater treatment method is characterized in that it may further comprise the steps:
At first, flocculation agent is dissolved at molten medicine-chest 1 in the ratio of 1:200～1000, obtain the flocculation agent lysate; The different adding emulsion splitters of the difference of butyraceous composition and wastewater property in case of necessity should be in molten medicine-chest 1 according to waste water;
Secondly, at least the ratio of injecting 5～120 kg flocculation agent lysate in waste water per ton makes flocculation agent lysate and oily(waste)water enter pump 2 (preferably adopting the high speed liquid charge pump) together, under the effect of pump 2, make oily(waste)water and flocculation agent lysate thorough mixing, oil, water in water-in-oil or the oil-in-water waste water are thoroughly divided, reach the purpose of breakdown of emulsion.Also can make the flocculation agent lysate in the ratio that waste water per ton injects 5～120 kg flocculation agent lysate at least and mix through the moisture waste oil behind pump 2 superchargings and the high speed rotating after enter next process, promptly the filler of flocculation agent lysate is positioned at the exit end of pump 2;
The 3rd, the oily(waste)water that high speed liquid charge pump 2 pumps is sent into from the bottom of stabilizing feed well 4 in the stabilizing feed well 4 to realize breakdown of emulsion equably by eddy flow cutting water distributor 3, oily(waste)water behind the breakdown of emulsion carries out pedesis and does not produce emulsion at stabilizing feed well 4, and it is excessive to urceolus 5 interior formation turbulent fluctuations, make the oil droplet that is of a size of 0.001～0.01 μ m form the oil droplet that is of a size of 0.01～1 μ m, finish incorgruous flocculation, utilize the equipment that deoils that the flocculation oil droplet of emersion liquid level in the urceolus 5 is collected in the oil header 25;
The 4th, the waste water that utilizes perforation header 23 oil-containing to be of a size of the flocculation oil droplet of 0.01～1 μ m from the bottom of urceolus 5 is sent into and is carried out thorough mixing the tempering tank 8, so that the oil droplet after the incorgruous flocculation flocculates in the same way, formation is of a size of the particulate material of 1～10 μ m, and waste water is in the same way flocculated;
The 5th, to enter the oily water separation chamber 9 through the outlet at bottom of the waste water after flocculating in the same way from tempering tank, at the waterwater entrance place of oily water separation chamber 9 high pressure dissolved air release 22 is installed simultaneously, the dissolved air water thorough mixing that waste water and high pressure dissolved air release 22 are discharged, thereby the proportion that makes in the same way oil droplet after the flocculation and other component is less than 1, float on liquid level after the oily water separation, oil droplet and other component that will float on liquid level with degreasing machine is collected in the oil header 25 again;
The 6th, the water collecting and drainage system 21 that utilization is arranged in 9 bottoms, oily water separation chamber promotes after hydraucone water distributor 18 is evenly distributed on the reflector 20 of settling pond 19, tube settling district 17 is installed on top at reflector 20, waste water after reflector 20 reflections enters tube settling district 17 and further separates, clear water enters Buffer Pool 15 after the zig-zag water leg 13 on the top in tube settling district 17 is collected, the effect of the inclined tube of flocculation particle in tube settling district 17 is lowered into settling pond 19.The regularly outer sludge sump that drains into of throw out.
Flow into Buffer Pool 15 in order to prevent part flocculation particle from from the inclined tube in tube settling district 17, entering behind the emersion in the zig-zag water leg 13, the part flocculation particle that prevents 17 come-ups from the tube settling district is installed around zig-zag water leg 13 enters Buffer Pool 15, skimming plate 12 wherein.
A kind of complete device for treating oily wastewater is characterized in that it comprises:.
One is used for the flocculation agent molten medicine-chest 1 of dissolved in proportion;
One is used for the flocculation agent lysate and the oily(waste)water of molten medicine-chest 1 are carried out high speed rotating blended pump 2 in proportion, and the input terminus of pump 2 or exit end link to each other with the exit end of molten medicine-chest 1;
One is installed in the eddy flow cutting water distributor 3 of stabilizing feed well 4 bottoms, and the entrance end of this eddy flow cutting water distributor 3 links to each other by the output terminal of pipeline with pump 2, and its exit end is positioned at the inner bottom part of stabilizing feed well 4, and stabilizing feed well 4 is installed in the urceolus 5 that makes waste water finish incorgruous flocculation;
One first degreaser 6 with the taking-up of the waste oil in the urceolus 5;
One is used to deposit the oil header 25 of waste oil;
One makes waste water finish the tempering tank 8 of flocculation in the same way, and this tempering tank 8 links to each other with urceolus 5 by perforation header 23, and the waste water in the urceolus 5 enters in the tempering tank 8 by this perforation header 23; Character according to waste water is equipped with mixing tank or agitator in tempering tank 8;
One oily water separation chamber 9, the bottom of this separate chamber 9 is provided with the waste water import that communicates with aforementioned tempering tank 8 bottoms, described waste water ingress be equipped with in waste water, inject dissolved air water so that the flocculation oil droplet of waste water and other component proportion less than 1 high pressure dissolved air release 22; Waste oil that second degreaser, 10, the second degreasers 10 that wherein waste oil and other component are taken out take out also is installed on the top of this oily water separation chamber 9 directly to be sent in the oil header 25 or by an oil trap 11 that links to each other with oil header 25 and sends in the oil header 25;
One settling pond 19, tube settling district 17 is installed in settling pond 19, in the settling pond 19 of 17 bottoms, tube settling district, be provided with reflector 20, the top of the bottom in tube settling district 17, reflector 20 is equipped with hydraucone water distributor 18, hydraucone water distributor 18 links to each other with the water collecting and drainage system 21 that is positioned at 9 bottoms, oily water separation chamber by pipe connecting 26, thus with in the oily water separation chamber 9 through in the same way the flocculation after oily(waste)water draining settling pond 19 in; The lower end of described pipe connecting 26 links to each other with the water outlet of water collecting and drainage system 21, and its upper end joins with hydraucone water distributor 18 after drawing from the top of oily water separation chamber 9 and passing tube settling district 17;
One is used to receive the Buffer Pool 15 of the clear water after treatment that overflows from 17 tops, tube settling district after settling pond 19 sinks clearly.
The water inlet pipe of described high pressure dissolved air release 22 links to each other for the bottom of running water pipe or Buffer Pool 15 with the city.
The inclination angle of the inclined tube in described tube settling district is the 50-65 degree.
The top of described settling pond 19 is provided with to entering the zig-zag water leg 13 of Buffer Pool 15, and zig-zag water leg 13 links to each other with Buffer Pool 15 by the water pipe that valve, under meter 14 are installed.
The water inlet of described zig-zag water leg 13 is equipped with skimming plate 12.
Described first degreaser 6 and second degreaser 10 are for the oil skimming machine or push away oily machine.
Beneficial effect of the present invention:
1, apparatus structure compactness of the present invention, treatment scheme is simple.
Device of the present invention integrates technologies such as dosing, breakdown of emulsion, mixing, coagulation, flocculation, separation, oil-collecting, clarification, the integrated degree height, and pipeline connects few, and novel, volume is little, small accommodation area.
2, buildings is few, capital cost is low.
Buildings of the present invention only needs a water collecting basin and Equipment Foundations, need not capital construction facilities such as oil trap, middle pond.
3, energy consumption is little, working cost is low.
Need not to heat, add acid during breakdown of emulsion of the present invention, emulsion splitter is conventional flocculation agent, and without the polymeric flocculant breakdown of emulsion, so molten prescription just, and is simple to operate, wide accommodation, the design inflow temperature is the 5-70 degree, and while level of automation height, the waste water of equipment room are the gravity flow operation.Conventional equipment uses limitation big, need heat during breakdown of emulsion to adding polymeric flocculant more than 65 ° again, demulsification is subjected to the influence of environment, as polyacrylamide etc., its molten medicine difficulty, be prone to agglomerating phenomenon when dry powder adds, both wasted medicament, easily block pumps, valve, flow are taken into account pipeline again, medicament costs an arm and a leg simultaneously, the working cost height, as then trucking costs is big with liquid preparation, accumulating is loaded down with trivial details.Processing costs of the present invention can be reduced to about 0.6～5 yuan/ton by 10～80 yuan/ton of conventional equipment.
4, good, the non-secondary pollution of treatment effect
As waste water oleaginousness 〉=3000mg/l, greasy processing rate is about 98%, and the COD clearance is greater than 50%, and the suspended substance removal rate is 99%, stable water outlet, and the recyclable utilization of waste oil, waste residue reclaims and refines or do fuel.And same category of device is when waste water oleaginousness 〉=400mg/l, and deoiling effect is less than 80%.Add acid, will produce volatile gases after heating, in the waste water and back produces salt simultaneously, has both formed secondary pollution, influences the effect of advanced treatment again.
5, reduced investment, instant effect
Equipment of the present invention is the anticorrosion integrated complexes of carbon steel, is transported to the on-the-spot power supply of connecting, and can normally move, and the concrete material of equipment also can be made by oneself by the user.And at present similar miscellaneous equipment technology need heat, add acid, add alkali, flocculation.Equipment requirements is a stainless steel, and the combination of many complete equipments just can reach treatment effect.
6, easy to maintenance, manageability
Auxiliary facility of the present invention is water pump, air compressor machine, step-down gear, valve, under meter etc., and type selecting is fastidious, and time-based maintenance gets final product in accordance with regulations.And miscellaneous equipment of the same type, complex operation, it is high that acid, alkali accumulating require, workman's operational safety coefficient difference.
7, thing, change combine
The present invention adopts chemical method breakdown of emulsion, flocculation.The separation of physics method, oil-collecting and clarification, optimum combination.Emulsion splitter and flocculation agent are conventional water purification agent.Nontoxic, harmless, non-corrosiveness are so service life of equipment is long.
8, level of automation height
Coordinative composition of equipments operation water inlet, dosing, breakdown of emulsion, separation, oil-collecting, clarification, water outlet can be automatically and manual operation, liquid automatic control, have simultaneously cut off the water supply, warning functions such as the phase failure, overload protection.
9, the present invention adopts synchronous dosing, utilizing the high speed rotating effect of pump to break molecular structure makes flocculation agent fully combine with oil molecule, reach the purpose of breakdown of emulsion, and make full use of eddy flow cutting water distributor and carry out water distribution uniformity, produce action of turbulent flow behind the current stabilization, prevent the generation of emulsion phenomenon, emulsion splitter and flocculation agent are played one's part to the full, dual function by incorgruous flocculation and flocculation has in the same way improved breakdown of emulsion and flocculating effect, and strict control water (flow) direction and speed, make it to form irreversible demulsification, improved separating effect.
10, the present invention has further improved separating effect by utilizing the tube settling device.
Description of drawings
Fig. 1 is the structural representation of complexes of the present invention.
Fig. 2 is the structural representation of eddy flow cutting water distributor of the present invention.
Fig. 3 is the structural representation of looking up of Fig. 2.
Fig. 4 is the structural representation of the inclined tube assembly in tube settling of the present invention district.
16 is water discharge valve among the figure, and 24 is oil discharge outlet.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Embodiment one.
Shown in Fig. 1-4.
A kind of oily wastewater treatment method, it may further comprise the steps:
At first, flocculation agent (can adopt several thousand yuan one ton common flocculation agent, also can adopt several ten thousand yuan one ton polymeric flocculant) is dissolved at molten medicine-chest 1 in the ratio of 1:200～1000, obtain the flocculation agent lysate;
Secondly, at least the ratio of injecting 5～120 kg flocculation agent lysate (comprising the flocculation agent lysate that contains emulsion splitter) in waste water per ton makes flocculation agent lysate and oily(waste)water enter high speed liquid charge pump 2 together (should adopt the quick runner pump, its flow can be determined according to the water yield that need are handled), under the effect of high speed liquid charge pump 2, make oily(waste)water and flocculation agent lysate thorough mixing, reach the purpose of breakdown of emulsion, obtain the oily(waste)water behind the breakdown of emulsion;
The 3rd, the oily(waste)water that pump 2 is pumped is (or by eddy flow cutting water distributor 3 (Fig. 2, shown in 3) send in the stabilizing feed well 4 to realize breakdown of emulsion from the bottom of stabilizing feed well 4 (for top barrel shaped structure not with a lid) equably, oily(waste)water behind the breakdown of emulsion carries out pedesis and does not produce emulsion and excessive formation turbulent fluctuation in the urceolus 5 at stabilizing feed well 4, make the oil droplet that is of a size of 0.001～0.01 μ m form the oil droplet that is of a size of 0.01～1 μ m, finish incorgruous flocculation, utilize the equipment that deoils (as oil skimming machine commonly used) that the flocculation oil droplet of emersion liquid level in the urceolus 5 is collected in the oil header 25;
The 4th, utilize perforation header 23 will contain and send into the tempering tank 8 and mix with the waste water of the flocculation oil droplet that is of a size of 0.01～1 μ m from the bottom of urceolus 5, mixing can utilize flowing of current itself to be realized, also can be realized by increasing external force, can close by using conventional mixer tool or agitator to boil, so that the oil droplet after the incorgruous flocculation flocculates in the same way, form the particulate material that is of a size of 1～10 μ m, waste water is in the same way flocculated;
The 5th, to enter the oily water separation chamber 9 through the outlet at bottom of the waste water after flocculating in the same way from tempering tank, at the waterwater entrance place of oily water separation chamber 9 high pressure dissolved air release 22 is installed simultaneously, the dissolved air water thorough mixing that waste water and high pressure dissolved air release 22 are discharged, thereby the proportion that makes in the same way oil droplet after the flocculation and other component is less than 1, float on liquid level after the oily water separation, oil droplet and other component that will float on liquid level with degreasing machine is collected in the oil header 25 again;
The 6th, the water collecting and drainage system 21 that utilization is arranged in 9 bottoms, oily water separation chamber promotes after hydraucone water distributor 18 is evenly distributed on the reflector 20 of settling pond 19,17 (as shown in Figure 4) of tube settling district are installed on the top of reflector 20, the inclination angle of the inclined tube in tube settling district 17 can be selected between the 50-65 degree, the tube settling district is a polynuclear plane, waste water after reflector 20 reflections enters tube settling district 17 and further separates, clear water enters Buffer Pool 15 after the zig-zag water leg 13 on the top in tube settling district 17 is collected, the effect of the inclined tube of flocculation particle in tube settling district 17 is lowered into settling pond 19.
For the skimming plate wherein 12 that prevents from that part flocculation particle from entering behind the emersion in the zig-zag water leg 13 from the inclined tube in tube settling district 17, around zig-zag water leg 13, be equipped with to prevent that the 17 part flocculation particles that float enter from the tube settling district.
Embodiment two.
As Fig. 1-4.
Present embodiment is that with the difference of example one to increase treatment effect, its add-on can be with reference to relevant explanation and handbook according to the emulsion splitters of the different amounts of different addings of butyraceous composition (comprising oleaginousness) and wastewater property in the waste water; The solution that adds behind the emulsion splitter is still identical with embodiment one with the blending ratio of waste water, and its filling position is also identical, remains with waste water and enters pump high speed rotation mixing from the entrance end of pump 2.
Embodiment three.
The difference of present embodiment and embodiment one only is that the solution in the molten medicine-chest 1 adds the waste pipe from the pipeline of the exit end of pump 2, directly with after mixing through the oily(waste)waters after pump 2 superchargings enters eddy flow and cuts breakdown of emulsion in the water distributor 3.
Embodiment four.
Present embodiment and the difference of embodiment three are in the molten medicine-chest 1 also and the embodiment two the same emulsion splitters that are added with.
Embodiment five.
A kind of complete device for treating oily wastewater, the oily water separation that can be used for oily(waste)waters such as vegetable oil production waste water, mechanical workout oil waste water, cold-rolled lubricating oil, hot-rolling oil, aluminium rolling oil, smooth liquid, slushing oil, polishing liquid, cutting fluid, grinding fluid is handled.As shown in Figure 1, these complexes comprise:
One is used for flocculation agent (can adopt medicaments such as displacement of reservoir oil emulsion splitter or polymerize aluminum chloride) the molten medicine-chest 1 of dissolved (identical with the molten medicine-chest of existing flocculation agent) in proportion; Emulsion splitter also can add dissolving simultaneously in the molten medicine-chest 1 in case of necessity;
One is used for oily(waste)water is carried out the pump 2 (model can be: ZX type or ZW type) of high speed rotating supercharging, and the input terminus of pump 2 or exit end link to each other with the exit end of molten medicine-chest 1;
One is installed in the eddy flow cutting water distributor 3 (Fig. 2,3) of stabilizing feed well 4 bottoms, the entrance end of this eddy flow cutting water distributor 3 links to each other by the output terminal of pipeline with pump 2, its exit end is positioned at the inner bottom part of stabilizing feed well 4, and stabilizing feed well 4 is installed in the urceolus 5 that makes waste water finish incorgruous flocculation;
One first degreaser 6 (can adopt the commercially available oil skimming machine that is installed in urceolus 5 tops to be realized) with the taking-up of the waste oil in the urceolus 5;
One is used to deposit the oil header 25 of waste oil;
One makes waste water finish the tempering tank 8 of flocculation in the same way, and this tempering tank 8 links to each other with urceolus 5 by perforation header 23, and the waste water in the urceolus 5 enters in the tempering tank 8 by this perforation header 23; Also can conventional mixing tank or agitator be installed with the acceleration mixing effect in tempering tank 8 during concrete enforcement according to wastewater property;
One oily water separation chamber 9, the bottom of this separate chamber 9 is provided with the waste water import that communicates with aforementioned tempering tank 8 bottoms, be equipped with in waste water in described waste water ingress and inject dissolved air water so that the flocculation oil droplet of waste water and other component proportion (mainly are made up of compressor, air dissolved pump and nozzle less than 1 high pressure dissolved air release 22, the high pressure gas that compressor produces make nebulize ejection and form numerous micro bubble in waste water of the water in the water jet, make part oil droplet or other component combine formation proportion with bubble less than 1 macrobead flocs unit); Second degreaser 10 that wherein waste oil is taken out also is installed on the top of this oily water separation chamber 9 (can adopts the commercially available oily machine that pushes away, push away oil by artificial or mechanical drive), the waste oil that second degreaser 10 takes out can directly be sent in the oil header 25, also can send into earlier one with oil trap 11 that oil header 25 links to each other in, and then send in the oil header 25;
One settling pond 19, tube settling district 17 is installed in settling pond 19, reflector 20 has suspended in the settling pond 19 of 17 bottoms, tube settling district, the top of the bottom in tube settling district 17, reflector 20 is equipped with hydraucone water distributor 18, thus hydraucone water distributor 18 by pipe connecting 26 link to each other with the water collecting and drainage system 21 that is arranged in 9 bottoms, oily water separation chamber with oily water separation chamber 9 through in the same way the flocculation after oily(waste)water draining settling pond 19; The lower end of described pipe connecting 26 links to each other with the water outlet of water collecting and drainage system 21, and its upper end links to each other with hydraucone water distributor 18 after drawing from the top of oily water separation chamber 9 and passing tube settling district 17;
One is used to receive the Buffer Pool 15 of the clear water after treatment that overflows from 17 tops, tube settling district after settling pond 19 sinks clearly.
In order to reduce water consumption, the water inlet pipe of high pressure dissolved air release 22 can be linked to each other for the bottom of running water pipe or Buffer Pool 15 with the city during concrete enforcement.The inclination angle of the inclined tube in tube settling district is the 50-65 degree and is the cellular settling pond that places; like this, enter in the inclined tube by the water of reflector 20 reflection and to rise, be subjected to the effect of inclined tube; cotton-shaped particle can glide along tube wall and sink to the bottom of settling pond, the regularly outer sludge sump that drains into.
The top of settling pond 19 also can be provided with a zig-zag water leg 13 for Buffer Pool 15 water supply during concrete enforcement, the water inlet of zig-zag water leg 13 is equipped with skimming plate 12, zig-zag water leg 13 links to each other with Buffer Pool 15 by the water pipe that valve and under meter 14 are installed, water in the Buffer Pool 15 can directly discharge or do advanced treatment, also can be used as process water and recycles.
It is PMA2-4 type use in waste water treatment flocculation agent that flocculation agent in the foregoing description can adopt the trade mark, and emulsion splitter can adopt the ZC-3185 type to be realized.
Principle of work of the present invention is:
The oily(waste)water that is discharged in the production is after water collecting basin is collected, be evacuated in the comprehensive oil eliminator by pump 2 and handle, at first we have adopted dosing before the pump (also can adopt dosing behind the pump when specifically implementing, but it is best with dosing effect before the pump), flocculation agent after the dissolving is at molten medicine-chest 1, under the impeller high speed rotating of pump 2, make oily(waste)water and flocculation agent thorough mixing, thereby the molecular structure of breaking it reaches the purpose of breakdown of emulsion.Waste water behind the breakdown of emulsion is distributed in the stabilizing feed well 4 equably by eddy flow cutting water distributor 3, produces pedesis (irregular movement) under the effect of stabilizing feed well.Behind impeller high speed rotating breakdown of emulsion, the oil droplet that makes 0.001-0.01um under the effect of current stabilization and do not produce emulsion because the Emulsion behind the emulsion breakdown of emulsion is very difficult again, it is also very complicated promptly to enable demulsification technology, cost is also very high.
Waste water behind the breakdown of emulsion is excessive to urceolus 5 by stabilizing feed well, forms a kind of turbulent fluctuation in urceolus 5.The mobile oil droplet chemistry that makes that is waste water takes off surely, 0.001 the oil droplet of-0.01um forms the incorgruous flocculation of 0.01-1um gradually, oil droplet after the flocculation partly floats on liquid level, automatically cast aside to oil trap 7 by oil skimming machine 6 and to converge to oil header 25, part waste water is collected to tempering tank 8 by perforation header 23 and carries out thorough mixing in addition.The effect of tempering tank is to make the oil droplet after the incorgruous flocculation change flocculation in the same way into through tempering tank, the oil droplet of 0.01-1um just, after flocculating in the same way, reach the graininess of 1-10um, make waste water and dissolved air water thorough mixing after the flocculation by high pressure dissolved air release 22 again, the proportion that makes in the same way oil droplet after the flocculation and other part objectionable impuritiess in the waste water is less than 1,9 float on liquid level through oily water separation in the oily water separation chamber, enter in the oil header 25 through Oil scraper 10 automatic frizing to oil traps 11.
Oily(waste)water after the two-phase flocculation, most of greasy proportion floats on liquid level less than 1, scrape to oil trap 11 by Oil scraper 10, enter in the oil header 25, other component in small portion grease and the waste water is blended in the waste water, so we are by the water collecting and drainage system in the oily water separation chamber 9 21, be arranged in equably on the reflector 20 through hydraucone water distributor 18, carry out gravity separation by inclined tube settling pond 19
The effect of hydraucone water distributor is that waste water can be arranged on the reflector uniformly, expand uniformly to tube settling district 17 by reflector, the other main effect of reflector is that the flow velocity of water shoot that catchments can be brought up to 100mm/s, and does not influence the clarifying effect of waste water.
When waste water under the flow velocity of the upper reaches in tube settling district speed less than 100mm/s, the flocculation particle will form a suspension tectum, to the small-particle throw out of come-up to tackling and adsorption, so oily water separation is more thorough.Primary water after the separation is collected into Buffer Pool 15 through peripheral sawtooth water leg 13, and for the throw out that prevents to float enters clear water Buffer Pool 15, zig-zag water leg 13 is established skimming plate 12, stops the come-up throw out that may occur, and guarantees that primary water enters Buffer Pool 15.
For the conserve water resource, further reduce running cost, the waste water of Buffer Pool uses for dissolved air release as dissolved air water on the one hand, and the aspect is the whole liquid level of removing oil system of balance in addition, and when reaching operation is best effect.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (10)
1, a kind of oily wastewater treatment method is characterized in that it may further comprise the steps:
At first, flocculation agent is dissolved at molten medicine-chest (1) in the ratio of 1:200～1000, obtain the flocculation agent lysate;
Secondly, at least the ratio of injecting 5～120 kg flocculation agent lysate in waste water per ton makes flocculation agent lysate and oily(waste)water enter pump (2) together, under the effect of pump (2), make oily(waste)water and flocculation agent lysate thorough mixing, oil, water in water-in-oil or the oil-in-water waste water are thoroughly divided, reach the purpose of breakdown of emulsion; Also can make the flocculation agent lysate in the ratio that waste water per ton injects 5～120 kg flocculation agent lysate at least and mix through the moisture waste oil after pump (2) supercharging after enter next process, promptly the filler of flocculation agent lysate is positioned at the exit end of pump (2);
The 3rd, the oily(waste)water that pump (2) is discharged cuts water distributor (3) by eddy flow and sends into from the bottom of stabilizing feed well (4) equably in the stabilizing feed well (4) to realize breakdown of emulsion, oily(waste)water behind the breakdown of emulsion carries out pedesis and does not produce emulsion at stabilizing feed well (4), and it is excessive to the interior formation of urceolus (5) turbulent fluctuation, make the oil droplet that is of a size of 0.001～0.01 μ m form the oil droplet that is of a size of 0.01～1 μ m, finish incorgruous flocculation, utilize the equipment that deoils that the flocculation oil droplet of emersion liquid level in the urceolus (5) is collected in the oil header (25);
The 4th, the waste water that utilizes perforation header (23) oil-containing to be of a size of the flocculation oil droplet of 0.01～1 μ m from the bottom of urceolus (5) is sent into the tempering tank (8) and is mixed, oil droplet after the incorgruous flocculation is flocculated in the same way, formation is of a size of the particulate material of 1～10 μ m, and waste water is in the same way flocculated;
The 5th, to enter the oily water separation chamber (9) through the outlet at bottom of the waste water after flocculating in the same way from tempering tank, at the waterwater entrance place of oily water separation chamber (9) high pressure dissolved air release (22) is installed simultaneously, the dissolved air water thorough mixing that waste water and high pressure dissolved air release (22) are discharged, thereby the proportion that makes in the same way oil droplet after the flocculation and other component is less than 1, float on liquid level after the oily water separation, oil droplet and other impurity that will float on liquid level with degreasing machine is collected in the oil header (25) again;
The 6th, the water collecting and drainage system (21) that utilization is arranged in bottom, oily water separation chamber (9) promotes after hydraucone water distributor (18) is evenly distributed on the reflector (20) of settling pond (19), tube settling district (17) is installed on top at reflector (20), waste water after reflector (20) reflection enters tube settling district (17) and further separates, clear water enters Buffer Pool (15) after the zig-zag water leg (13) on the top of tube settling district (17) is collected, the effect of the inclined tube of flocculation particle in tube settling district (17) is lowered into settling pond (19).
2, oily wastewater treatment method according to claim 1 is characterized in that being equipped with the part flocculation particle that prevents from tube settling district (17) come-up and enters Buffer Pool (15) around zig-zag water leg (13), skimming plate (12) wherein is set.
3, oily wastewater treatment method according to claim 1 is characterized in that described molten medicine-chest (1) also is added with emulsion splitter.
4, a kind of complete device for treating oily wastewater is characterized in that it comprises:
One is used for the flocculation agent molten medicine-chest of dissolved (1) in proportion;
One is used for oily(waste)water is carried out the pump (2) of high speed rotating, and the input terminus of pump (2) or exit end link to each other with the exit end of molten medicine-chest (1);
One is installed in the eddy flow cutting water distributor (3) of stabilizing feed well (4) bottom, the entrance end of this eddy flow cutting water distributor (3) links to each other by the output terminal of pipeline with pump (2), its exit end is positioned at the inner bottom part of stabilizing feed well (4), and stabilizing feed well (4) is installed in the urceolus (5) that makes waste water finish incorgruous flocculation;
One first degreaser (6) with the taking-up of the waste oil in the urceolus (5);
One is used to deposit the oil header (25) of waste oil;
One makes waste water finish the tempering tank (8) of flocculation in the same way, and this tempering tank (8) links to each other with urceolus (5) by perforation header (23), and the waste water in the urceolus (5) enters in the tempering tank (8) by this perforation header (23);
One oily water separation chamber (9), the bottom of this separate chamber (9) is provided with the waste water import that communicates with aforementioned tempering tank (8) bottom, described waste water ingress be equipped with in waste water, inject dissolved air water so that the flocculation oil droplet of waste water and other component proportion less than 1 high pressure dissolved air release (22); Second degreaser (10) that wherein waste oil is taken out also is installed on the top of this oily water separation chamber (9), and the waste oil that second degreaser (10) takes out is directly sent in the oil header (25) or by an oil trap (11) that links to each other with oil header (25) and is sent in the oil header (25);
One settling pond (19), tube settling district (17) is installed in settling pond (19), in the settling pond (19) of bottom, tube settling district (17), be provided with reflector (20), the top of the bottom in tube settling district (17), reflector (20) is equipped with hydraucone water distributor (18), hydraucone water distributor (18) by pipe connecting (26) with the water collecting and drainage system (21) that is arranged in oily water separation chamber (9) bottom thus link to each other with oily water separation chamber (9) through the oily(waste)water draining settling pond (19) after flocculating in the same way; The lower end of described pipe connecting (26) links to each other with the water outlet of water collecting and drainage system (21), and its upper end links to each other with hydraucone water distributor (18) after drawing from the top of oily water separation chamber (9) and passing tube settling district (17);
One is used for receiving the Buffer Pool (15) of the clear water after treatment that overflows from top, tube settling district (17) after settling pond (19) sinks clearly.
5, complete device for treating oily wastewater according to claim 4 is characterized in that the water inlet pipe of described high pressure dissolved air release (22) links to each other for the bottom of running water pipe or Buffer Pool (15) with the city.
6, complete device for treating oily wastewater according to claim 4, the inclination angle that it is characterized in that the inclined tube in described tube settling district is the 50-65 degree.
7, complete device for treating oily wastewater according to claim 4, the top that it is characterized in that described settling pond (19) is provided with the zig-zag water leg (13) that supplies water into Buffer Pool (15), and zig-zag water leg (13) links to each other with Buffer Pool (15) by the water pipe that valve and under meter (14) are installed.
8, complete device for treating oily wastewater according to claim 7 is characterized in that the water inlet of described zig-zag water leg (13) is equipped with skimming plate (12).
9, complete device for treating oily wastewater according to claim 4 is characterized in that described first degreaser (6) and second degreaser (10) are the oil skimming machine or push away oily machine.
10, complete device for treating oily wastewater according to claim 4 is characterized in that in the described tempering tank (8) mixing tank or agitator being installed.
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| CN2009100250754A CN101486515B (en) | 2009-02-17 | 2009-02-17 | Oily wastewater treatment method and whole set apparatus thereof |
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| CN2009100250754A CN101486515B (en) | 2009-02-17 | 2009-02-17 | Oily wastewater treatment method and whole set apparatus thereof |
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| CN105217831A (en) * | 2015-07-07 | 2016-01-06 | 南京国能环保工程有限公司 | Gravitational coagulation formula oily-water seperating equipment |
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