CN104276719B - For purification recovery device and the using method thereof of cold rolling wastewater - Google Patents
For purification recovery device and the using method thereof of cold rolling wastewater Download PDFInfo
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- CN104276719B CN104276719B CN201310290664.1A CN201310290664A CN104276719B CN 104276719 B CN104276719 B CN 104276719B CN 201310290664 A CN201310290664 A CN 201310290664A CN 104276719 B CN104276719 B CN 104276719B
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Abstract
The present invention relates to the process field of water, waste water, sewage or mud, be specially a kind of purification recovery device for cold rolling wastewater and using method thereof.For a purification recovery device for cold rolling wastewater, comprise oil-contained waste water treatment system (100), alkaline oil-contained waste water treatment system (200) and acid waste water treatment system (300).For a using method for the purification recovery device of cold rolling wastewater, comprise process oily(waste)water, process alkaline oily(waste)water and treatment of acidic wastewater.One-time investment of the present invention is low, and treatment effect is stablized, and production run cost is low, and automated operation degree is high, and operation runs easy.
Description
Technical field
The present invention relates to the process field of water, waste water, sewage or mud, be specially a kind of purification recovery device for cold rolling wastewater and using method thereof.
Background technology
Smelter can produce a large amount of waste water in cold-rolled process, and these waste water comprise emulsion and oil-bearing wastewater, leveling precision waste water, alkaline oily(waste)water and acid-bearing wastewater etc.Due to the complicacy of cold-rolling process, cold rolling wastewater has that kind is many, complicated component, quantity discharged and composition transfer are large and CODcr(CODcr system employing K
2cr
2o
7chemical oxygen demand as oxygenant determines) index high, the complicated component of cold rolling wastewater makes the intractability of cold rolling wastewater very big, poses a big pressure to environment.
Summary of the invention
In order to overcome the defect of prior art, providing that a kind of organic efficiency is high, good purification, the sewage treatment equipment that stable, cost is low, the invention discloses a kind of purification recovery device for cold rolling wastewater and using method thereof.
The present invention reaches goal of the invention by following technical solution:
For a purification recovery device for cold rolling wastewater, comprise oil-contained waste water treatment system, alkaline oil-contained waste water treatment system and acid waste water treatment system, it is characterized in that:
Oil-contained waste water treatment system is made up of oily(waste)water equalizing tank, floating-oil collector, oil well pump, oily(waste)water transferpump, breakdown of emulsion groove, the first electro-flotation, the first Oil and slag scraping machine, waste oil collecting groove and waste oil transferpump;
Floating-oil collector is provided with in oily(waste)water equalizing tank, the bottom of oily(waste)water equalizing tank is provided with wastewater outlet, the upper and lower of breakdown of emulsion groove is respectively equipped with waterwater entrance and wastewater outlet, the first Oil and slag scraping machine is provided with in first electro-flotation, the bottom of the first electro-flotation side is provided with waterwater entrance, the upper and lower of the first electro-flotation opposite side is respectively equipped with wastewater outlet and waste oil outlet, and the bottom of waste oil collecting groove is provided with waste oil outlet;
The waste oil outlet of floating-oil collector connects the fluid entrance of oil well pump by oil pipe, the fluid of oil well pump exports by oil pipe just to the notch of waste oil collecting groove, the wastewater outlet of oily(waste)water equalizing tank connects the pump mouth of oily(waste)water transferpump by water pipe, the water outlet of oily(waste)water transferpump connects the waterwater entrance of breakdown of emulsion groove by water pipe, the wastewater outlet of breakdown of emulsion groove connects the waterwater entrance of the first electro-flotation by water pipe, the waste oil of the first electro-flotation exports by oil pipe just to the notch of waste oil collecting groove, the waste oil outlet of waste oil collecting groove connects the oil pumping mouth of waste oil transferpump by oil pipe,
Alkalescence oil-contained waste water treatment system is by alkaline oily(waste)water equalizing tank, alkalescence oily(waste)water transferpump, one-level pH adjustment tank first, secondary pH adjustment tank first, stirrer first, stirrer second, preposition tempering tank, stirrer third, second electro-flotation, second Oil and slag scraping machine, intermediate pool, intermediate pool transferpump, cooling tower, biological contact oxidation pond, tempering tank first, flocculation tank first, stirrer fourth, stirrer penta, tilted plate separator first, alkaline sludge transferpump, alkalescence oily(waste)water discharge pond and alkaline oily(waste)water emptying pump composition,
The wastewater outlet of the first electro-flotation passes through water pipe just to the Chi Kou of alkaline oily(waste)water equalizing tank, the wastewater outlet of alkalescence oily(waste)water equalizing tank bottom connects one-level pH adjustment tank first by the water pipe being in series with alkaline oily(waste)water transferpump, and the through setting adjacent with secondary pH adjustment tank first of one-level pH adjustment tank first, the wastewater outlet of secondary pH adjustment tank first connects preposition tempering tank by water pipe, one-level pH adjustment tank first, stirrer first is respectively equipped with in secondary pH adjustment tank first and preposition tempering tank, stirrer second and stirrer third, the wastewater outlet of preposition tempering tank connects the waterwater entrance of the second electro-flotation by water pipe, the second Oil and slag scraping machine is provided with in second electro-flotation, the wastewater outlet of the second electro-flotation passes through water pipe just to the Chi Kou of intermediate pool, the wastewater outlet of intermediate pool by the water pipe that is in series with intermediate pool transferpump through cooling tower and cooling tower complete heat exchange obtain cooling be cooled to not higher than DEG C after connect the waterwater entrance of biological contact oxidation pond, the wastewater outlet of biological contact oxidation pond connects the waterwater entrance of tempering tank first by water pipe, and the through setting adjacent with flocculation tank first of tempering tank first, the wastewater outlet of flocculation tank first connects the waterwater entrance of tilted plate separator first by water pipe, stirrer fourth and stirrer penta is respectively equipped with in tempering tank first and flocculation tank first, the wastewater outlet of tilted plate separator first just discharges pond to alkaline oily(waste)water by water pipe, the sediment discharge mouth of tilted plate separator first connects sludge treating system by the water pipe being in series with alkaline sludge transferpump,
Acid waste water treatment system is pungent by acid waste water equalizing tank, acid waste water transferpump, one-level pH adjustment tank second, secondary pH adjustment tank second, oneself, tempering tank second, flocculation tank second, stirrer heptan, stirrer of electrooxidation equipment first, stirrer, tilted plate separator second, acid sludge transferpump, finally discharge pond, electrooxidation equipment second, reuse water pump and reuse water pot and form;
The wastewater outlet in alkalescence oily(waste)water discharge pond connects the waterwater entrance of acid waste water equalizing tank by the water pipe being in series with alkaline oily(waste)water emptying pump, the wastewater outlet of acid waste water equalizing tank connects the waterwater entrance of one-level pH adjustment tank second by the water pipe being in series with acid waste water transferpump, and the through setting adjacent with secondary pH adjustment tank second of one-level pH adjustment tank second, the wastewater outlet of secondary pH adjustment tank second connects the waterwater entrance of tempering tank second by water pipe, be respectively equipped with in one-level pH adjustment tank second and secondary pH adjustment tank second electrooxidation equipment first and stirrer oneself, and the through setting adjacent with flocculation tank second of tempering tank second, be respectively equipped with stirrer heptan in tempering tank second and flocculation tank second and stirrer pungent, the wastewater outlet of flocculation tank second connects the waterwater entrance of tilted plate separator second by water pipe, the wastewater outlet of tilted plate separator second passes through water pipe just to the Chi Kou in final discharge pond, the sediment discharge mouth of tilted plate separator second connects sludge treating system by the water pipe being in series with acid sludge transferpump, electrooxidation equipment second is provided with in final discharge pond, the wastewater outlet in final discharge pond is by being in series with the water pipe of reuse water pump just to the entrance of reuse water pot.
The using method of the described purification recovery device for cold rolling wastewater, comprises process oily(waste)water, processes alkaline oily(waste)water and treatment of acidic wastewater, it is characterized in that: carry out successively as follows:
When a. processing oily(waste)water, emulsion and oily(waste)water first pump into oily(waste)water equalizing tank, add nitric acid in oily(waste)water equalizing tank and breakdown of emulsion is implemented to emulsion and oily(waste)water, in oily(waste)water equalizing tank floating-oil collector collect waste oil under the driving of oil well pump pump to waste oil collecting groove, waste water in oily(waste)water equalizing tank under the driving of oily(waste)water transferpump pump to breakdown of emulsion groove, waste water in breakdown of emulsion groove leaves standstill 1hour ~ 2hour after adding nitric acid and implements breakdown of emulsion, waste water in breakdown of emulsion groove after breakdown of emulsion inputs the first electro-flotation and implements to float to do further oil removing by micro-bubble, isolated waste oil input waste oil collecting groove in first electro-flotation, in first electro-flotation, isolated waste water is delivered to alkaline oily(waste)water equalizing tank, add nitric acid in waste oil collecting groove and breakdown of emulsion is implemented to waste oil, waste oil in waste oil collecting groove after breakdown of emulsion pumps under the driving of waste oil transferpump, outward transport is collected in pumpable to waste oil tank car,
When b. processing alkaline oily(waste)water, in first electro-flotation, isolated waste water is delivered to alkaline oily(waste)water equalizing tank, waste water in alkalescence oily(waste)water equalizing tank under the driving of alkaline oily(waste)water transferpump pump in one-level pH adjustment tank first, waste water successively by one-level pH adjustment tank first and secondary pH adjustment tank first with make through two-stage neutralization waste water ph ~ after input preposition tempering tank, waste water in preposition tempering tank adds water purification agent and flocculation agent, waste water in preposition tempering tank after flocculation inputs the second electro-flotation and removes impurity by micro-bubble floating, waste water input intermediate pool after second electro-flotation process, waste water in intermediate pool under the driving of intermediate pool transferpump pump to cooling tower, waste water be cooled in cooling tower not higher than DEG C after input biological contact oxidation pond implement microbiological deterioration, the bottom of biological contact oxidation pond is provided with aeration tube and implements aeration aerating to waste water, in biological contact oxidation pond, wastewater temperature is at 20 DEG C ~ 35 DEG C, pH value is 6 ~ 9, microbiological deterioration time 15hour, waste water input tempering tank first in biological contact oxidation pond after microbiological deterioration, waste water is successively by tempering tank first and flocculation tank first, water purification agent and flocculation agent is added in flocculation tank first, one-level pH adjustment tank first, secondary pH adjustment tank first, preposition tempering tank, stirrer first in tempering tank first and flocculation tank first, stirrer second, stirrer third, stirrer fourth and stirrer penta are by stirring waste water to improve governing speed, waste water input tilted plate separator first in flocculation tank first after flocculation, the precipitated removal of suspended substance in tilted plate separator first in waste water, waste water in tilted plate separator first after precipitation inputs alkaline oily(waste)water discharge pond, throw out in tilted plate separator first under the driving of alkaline sludge transferpump pump to sludge treating system, alkalescence oily(waste)water discharge pond in waste water under the driving of alkaline oily(waste)water emptying pump pump to acid waste water equalizing tank,
C. during treatment of acidic wastewater, waste water pump in alkalescence oily(waste)water discharge pond is to acid waste water equalizing tank, waste water in acid waste water equalizing tank under the driving of acid waste water transferpump pump in one-level pH adjustment tank second, waste water makes waste water ph after 6 ~ 8, input tempering tank second by one-level pH adjustment tank second and secondary pH adjustment tank second to neutralize through two-stage successively, electrooxidation equipment first is provided with the ferrous ion in oxidized waste water and chlorion in one-level pH adjustment tank second, waste water is successively by tempering tank second and flocculation tank second, water purification agent and flocculation agent is added in flocculation tank second, secondary pH adjustment tank second, stirrer in tempering tank second and flocculation tank second oneself, stirrer heptan and pungent the passing through of stirrer stir waste water to improve governing speed, waste water input tilted plate separator second in flocculation tank second after flocculation, the precipitated removal of suspended substance in tilted plate separator second in waste water, waste water input in tilted plate separator second after precipitation finally discharges pond, throw out in tilted plate separator second under the driving of acid sludge transferpump pump to sludge treating system, electrooxidation equipment second is provided with the ferrous ion in further oxidized waste water and chlorion in final discharge pond, waste water under the driving of reuse water pump pump to reuse water pot, can be used for configuring milk of lime or ground watering etc.
The using method of the described purification recovery device for cold rolling wastewater, is characterized in that: the first electro-flotation, the second electro-flotation, electrooxidation equipment first and electrooxidation equipment second electrode used is all selected and do not consumed titanium base composition board; The control electric current of the first electro-flotation and the second electro-flotation is at 200A ~ 400A; The control electric current of electrooxidation equipment first and electrooxidation equipment second is at 600A ~ 800A.
The using method of the described purification recovery device for cold rolling wastewater, it is characterized in that: during a step process oily(waste)water, in breakdown of emulsion groove by steam heating to control wastewater temperature at 60 DEG C ~ 70 DEG C, the mass percent concentration adding nitric acid in breakdown of emulsion groove is 46%, and the add-on of nitric acid is 1% ~ 3% of wastewater quality.
The using method of the described purification recovery device for cold rolling wastewater, it is characterized in that: during the b step alkaline oily(waste)water of process and when c walks treatment of acidic wastewater, the multipolymer of aluminium chlorohydroxide and alkali formula iron protochloride all selected by water purification agent used, and molecular formula is [Al
2(OH)
ncl
6-n]
x[Fe
2(OH)
ncl
6-n]
y, wherein n, x and y are positive integer, and the mass percent concentration of water purification agent is 10%, and the add-on of water purification agent adds 1mg ~ 5mg for often liter of waste water; Flocculation agent used all selects polyacrylamide, and the mass percent concentration of flocculation agent is 0.1% ~ 0.15%, and the add-on of flocculation agent adds 1mg ~ 10mg for often liter of waste water.
The using method of the described purification recovery device for cold rolling wastewater, it is characterized in that: tilted plate separator second used when tilted plate separator first used and c step treatment of acidic wastewater during b step process alkaline oily(waste)water, all select uniform water distribution on flow to tilted plate separator, surface load is 1m
3/ (m
2h) ~ 2m
3/ (m
2h).
The invention provides a kind for the treatment of process of cold rolling wastewater, the present invention effectively can process cold rolling wastewater, can realize again in the object in the reuse of waste water station own partial simultaneously, realize effective utilization of water resources.Cold rolling wastewater after process of the present invention, CODCr<70mg/L, oils is less than 3mg/L, meets the requirement of the cold rolling wastewater qualified discharge after process and part reuse.
The invention has the beneficial effects as follows: one-time investment is low, treatment effect is stablized, and production run cost is low, and automated operation degree is high, and operation runs easy.
Accompanying drawing explanation
Fig. 1 is the structural representation of oil-contained waste water treatment system in the present invention;
Fig. 2 is the structural representation of neutral and alkali oil-contained waste water treatment system of the present invention;
Fig. 3 is the structural representation of acid waste water treatment system in the present invention;
Fig. 4 is the schema of the present invention when using.
Embodiment
The present invention is further illustrated below by way of specific embodiment.
Embodiment 1
For a purification recovery device for cold rolling wastewater, comprise oil-contained waste water treatment system 100, alkaline oil-contained waste water treatment system 200 and acid waste water treatment system 300, as shown in FIG. 1 to 3, concrete structure is:
Oil-contained waste water treatment system 100 as shown in Figure 1, is made up of oily(waste)water equalizing tank 1, floating-oil collector 2, oil well pump 3, oily(waste)water transferpump 4, breakdown of emulsion groove 5, first electro-flotation 6, first Oil and slag scraping machine 7, waste oil collecting groove 8 and waste oil transferpump 9;
Floating-oil collector 2 is provided with in oily(waste)water equalizing tank 1, the bottom of oily(waste)water equalizing tank 1 is provided with wastewater outlet, the upper and lower of breakdown of emulsion groove 5 is respectively equipped with waterwater entrance and wastewater outlet, the first Oil and slag scraping machine 7 is provided with in first electro-flotation 6, the bottom of the first electro-flotation 6 side is provided with waterwater entrance, the upper and lower of the first electro-flotation 6 opposite side is respectively equipped with wastewater outlet and waste oil outlet, and the bottom of waste oil collecting groove 8 is provided with waste oil outlet;
The waste oil outlet of floating-oil collector 2 connects the fluid entrance of oil well pump 3 by oil pipe, the fluid of oil well pump 3 exports by oil pipe just to the notch of waste oil collecting groove 8, the wastewater outlet of oily(waste)water equalizing tank 1 connects the pump mouth of oily(waste)water transferpump 4 by water pipe, the water outlet of oily(waste)water transferpump 4 connects the waterwater entrance of breakdown of emulsion groove 5 by water pipe, the wastewater outlet of breakdown of emulsion groove 5 connects the waterwater entrance of the first electro-flotation 6 by water pipe, the waste oil of the first electro-flotation 6 exports by oil pipe just to the notch of waste oil collecting groove 8, the waste oil outlet of waste oil collecting groove 8 connects the oil pumping mouth of waste oil transferpump 9 by oil pipe,
Alkalescence oil-contained waste water treatment system 200 as shown in Figure 2, by alkaline oily(waste)water equalizing tank 10, alkalescence oily(waste)water transferpump 11, one-level pH adjustment tank first 12, secondary pH adjustment tank first 13, stirrer first 14, stirrer second 15, preposition tempering tank 16, stirrer the third 17, second electro-flotation 18, second Oil and slag scraping machine 19, intermediate pool 20, intermediate pool transferpump 21, cooling tower 22, biological contact oxidation pond 23, tempering tank first 24, flocculation tank first 25, stirrer fourth 26, stirrer penta 27, tilted plate separator first 28, alkaline sludge transferpump 29, alkalescence oily(waste)water discharge pond 30 and alkaline oily(waste)water emptying pump 31 form,
The wastewater outlet of the first electro-flotation 6 passes through water pipe just to the Chi Kou of alkaline oily(waste)water equalizing tank 10, the wastewater outlet of alkalescence oily(waste)water equalizing tank 10 bottom connects one-level pH adjustment tank first 12 by the water pipe being in series with alkaline oily(waste)water transferpump 11, one-level pH adjustment tank first 12 and through setting adjacent with secondary pH adjustment tank first 13, the wastewater outlet of secondary pH adjustment tank first 13 connects preposition tempering tank 16 by water pipe, one-level pH adjustment tank first 12, stirrer first 14 is respectively equipped with in secondary pH adjustment tank first 13 and preposition tempering tank 16, stirrer second 15 and stirrer the third 17, the wastewater outlet of preposition tempering tank 16 connects the waterwater entrance of the second electro-flotation 18 by water pipe, the second Oil and slag scraping machine 19 is provided with in second electro-flotation 18, the wastewater outlet of the second electro-flotation 18 passes through water pipe just to the Chi Kou of intermediate pool 20, the wastewater outlet of intermediate pool 20 completes through cooling tower 22 waterwater entrance connecting biological contact oxidation pond 23 after heat exchange obtains cooling by the water pipe that is in series with intermediate pool transferpump 21 at cooling tower 22, the wastewater outlet of biological contact oxidation pond 23 connects the waterwater entrance of tempering tank first 24 by water pipe, tempering tank first 24 and through setting adjacent with flocculation tank first 25, the wastewater outlet of flocculation tank first 25 connects the waterwater entrance of tilted plate separator first 28 by water pipe, stirrer fourth 26 and stirrer penta 27 is respectively equipped with in tempering tank first 24 and flocculation tank first 25, the wastewater outlet of tilted plate separator first 28 just discharges pond 30 to alkaline oily(waste)water by water pipe, the sediment discharge mouth of tilted plate separator first 28 connects sludge treating system by the water pipe being in series with alkaline sludge transferpump 29,
Acid waste water treatment system 300 as shown in Figure 3, by acid waste water equalizing tank 32, acid waste water transferpump 33, one-level pH adjustment tank second 34, secondary pH adjustment tank second 35, electrooxidation equipment first 36, stirrer oneself 37, tempering tank second 38, flocculation tank second 39, stirrer heptan 40, stirrer pungent 41, tilted plate separator second 42, acid sludge transferpump 43, final discharge pond 44, electrooxidation equipment second 45, reuse water pump 46 and reuse water pot 47 form;
The wastewater outlet in alkalescence oily(waste)water discharge pond 30 connects the waterwater entrance of acid waste water equalizing tank 32 by the water pipe being in series with alkaline oily(waste)water emptying pump 31, the wastewater outlet of acid waste water equalizing tank 32 connects the waterwater entrance of one-level pH adjustment tank second 34 by the water pipe being in series with acid waste water transferpump 33, one-level pH adjustment tank second 34 and through setting adjacent with secondary pH adjustment tank second 35, the wastewater outlet of secondary pH adjustment tank second 35 connects the waterwater entrance of tempering tank second 38 by water pipe, be respectively equipped with in one-level pH adjustment tank second 34 and secondary pH adjustment tank second 35 electrooxidation equipment first 36 and stirrer oneself 37, tempering tank second 38 and through setting adjacent with flocculation tank second 39, stirrer heptan 40 and stirrer pungent 41 is respectively equipped with in tempering tank second 38 and flocculation tank second 39, the wastewater outlet of flocculation tank second 39 connects the waterwater entrance of tilted plate separator second 42 by water pipe, the wastewater outlet of tilted plate separator second 42 passes through water pipe just to the Chi Kou in final discharge pond 44, the sediment discharge mouth of tilted plate separator second 42 connects sludge treating system by the water pipe being in series with acid sludge transferpump 43, electrooxidation equipment second 45 is provided with in final discharge pond 44, the wastewater outlet in final discharge pond 44 is by being in series with the water pipe of reuse water pump 46 just to the entrance of reuse water pot 47.
When the present embodiment uses, comprise process oily(waste)water, process alkaline oily(waste)water and treatment of acidic wastewater, processing flow chart as shown in Figure 4, specifically carries out as follows successively:
When a. processing oily(waste)water, emulsion and oily(waste)water first pump into oily(waste)water equalizing tank 1 as shown in fig. ia, add nitric acid in oily(waste)water equalizing tank 1 and breakdown of emulsion is implemented to emulsion and oily(waste)water, in oily(waste)water equalizing tank 1 floating-oil collector 2 collect waste oil under the driving of oil well pump 3 pump to waste oil collecting groove 8, waste water in oily(waste)water equalizing tank 1 under the driving of oily(waste)water transferpump 4 pump to breakdown of emulsion groove 5, waste water in breakdown of emulsion groove 5 leaves standstill 1hour ~ 2hour after adding nitric acid and implements breakdown of emulsion, in breakdown of emulsion groove 5 by steam heating to control wastewater temperature at 60 DEG C ~ 70 DEG C, the mass percent concentration adding nitric acid in breakdown of emulsion groove 5 is 46%, the add-on of nitric acid is 1% ~ 3% of wastewater quality, waste water in breakdown of emulsion groove 5 after breakdown of emulsion inputs the first electro-flotation 6 and implemented micro-bubble floating to do further oil removing, first electro-flotation 6 electrode used is selected and is not consumed titanium base composition board, the control electric current of the first electro-flotation 6 is at 200A ~ 400A, isolated waste oil input waste oil collecting groove 8 in first electro-flotation 6, in first electro-flotation 6, isolated waste water is delivered to alkaline oily(waste)water equalizing tank 10, as shown in fig. ib, add nitric acid in waste oil collecting groove 8 and breakdown of emulsion is implemented to waste oil, nitric acid is as shown in the c in Fig. 1, waste oil in waste oil collecting groove 8 after breakdown of emulsion pumps under the driving of waste oil transferpump 9, outward transport is collected in pumpable to waste oil tank car, as shown in the d in Fig. 1,
When b. processing alkaline oily(waste)water, in first electro-flotation 6, isolated waste water is delivered to alkaline oily(waste)water equalizing tank 10, as shown in the b in Fig. 2, waste water in alkalescence oily(waste)water equalizing tank 10 under the driving of alkaline oily(waste)water transferpump 11 pump in one-level pH adjustment tank first 12, waste water makes waste water ph after 6 ~ 8, input preposition tempering tank 16 by one-level pH adjustment tank first 12 and secondary pH adjustment tank first 13 to neutralize through two-stage successively, waste water in preposition tempering tank 16 adds water purification agent and flocculation agent, the multipolymer of aluminium chlorohydroxide and alkali formula iron protochloride selected by water purification agent, molecular formula is [Al
2(OH)
ncl
6-n]
x[Fe
2(OH)
ncl
6-n]
y, wherein n, x and y are positive integer, and the mass percent concentration of water purification agent is 10%, and the add-on of water purification agent adds 1mg ~ 5mg for often liter of waste water, polyacrylamide selected by flocculation agent, the mass percent concentration of flocculation agent is 0.1% ~ 0.15%, the add-on of flocculation agent adds 1mg ~ 10mg for often liter of waste water, waste water in preposition tempering tank 16 after flocculation inputs the second electro-flotation 18 and removes impurity by micro-bubble floating, second electro-flotation 18 electrode used is selected and is not consumed titanium base composition board, the control electric current of the second electro-flotation 18 is at 200A ~ 400A, waste water input intermediate pool 20 after second electro-flotation 18 processes, waste water in intermediate pool 20 under the driving of intermediate pool transferpump 21 pump to cooling tower 22, waste water is cooled in cooling tower 22 does not implement microbiological deterioration higher than inputting biological contact oxidation pond 23 after 35 DEG C, the bottom of biological contact oxidation pond 23 is provided with aeration tube and implements aeration aerating to waste water, in biological contact oxidation pond 23, wastewater temperature is at 20 DEG C ~ 35 DEG C, pH value is 6 ~ 9, microbiological deterioration time 15hour, waste water input tempering tank first 24 in biological contact oxidation pond 23 after microbiological deterioration, waste water is successively by tempering tank first 24 and flocculation tank first 25, water purification agent and flocculation agent is added in flocculation tank first 25, one-level pH adjustment tank first 12, secondary pH adjustment tank first 13, preposition tempering tank 16, stirrer first 14 in tempering tank first 24 and flocculation tank first 25, stirrer second 15, stirrer the third 17, stirrer fourth 26 and stirrer penta 27 is by stirring waste water to improve governing speed, waste water input tilted plate separator first 28 in flocculation tank first 25 after flocculation, tilted plate separator first 28 select uniform water distribution on flow to tilted plate separator, surface load is 1m
3/ m
2h ~ 2m
3/ m
2h, the precipitated removal of suspended substance in tilted plate separator first 28 in waste water, waste water in tilted plate separator first 28 after precipitation inputs alkaline oily(waste)water discharge pond 30, throw out in tilted plate separator first 28 under the driving of alkaline sludge transferpump 29 pump to sludge treating system, as shown in the e in Fig. 2, alkalescence oily(waste)water discharge pond 30 in waste water under the driving of alkaline oily(waste)water emptying pump 31 pump to acid waste water equalizing tank 32, as shown in the f in Fig. 2,
C. during treatment of acidic wastewater, waste water pump in alkalescence oily(waste)water discharge pond 30 is to acid waste water equalizing tank 32, as shown in the f in Fig. 3, waste water in acid waste water equalizing tank 32 under the driving of acid waste water transferpump 33 pump in one-level pH adjustment tank second 34, waste water makes waste water ph after 6 ~ 8, input tempering tank second 38 by one-level pH adjustment tank second 34 and secondary pH adjustment tank second 35 to neutralize through two-stage successively, electrooxidation equipment first 36 is provided with the ferrous ion in oxidized waste water and chlorion in one-level pH adjustment tank second 34, electrooxidation equipment first 36 electrode used is selected and is not consumed titanium base composition board, the control electric current of electrooxidation equipment first 36 is at 600A ~ 800A, waste water is successively by tempering tank second 38 and flocculation tank second 39, water purification agent and flocculation agent is added in flocculation tank second 39, the multipolymer of aluminium chlorohydroxide and alkali formula iron protochloride selected by water purification agent, molecular formula is [Al
2(OH)
ncl
6-n]
x[Fe
2(OH)
ncl
6-n]
y, wherein n, x and y are positive integer, and the mass percent concentration of water purification agent is 10%, and the add-on of water purification agent adds 1mg ~ 5mg for often liter of waste water, polyacrylamide selected by flocculation agent, the mass percent concentration of flocculation agent is 0.1% ~ 0.15%, the add-on of flocculation agent adds 1mg ~ 10mg for often liter of waste water, stirrer in secondary pH adjustment tank second 35, tempering tank second 38 and flocculation tank second 39 oneself 37, stirrer heptan 40 and stirrer pungent 41 be by stirring waste water to improve governing speed, waste water input tilted plate separator second 42 in flocculation tank second 39 after flocculation, tilted plate separator second 42 select uniform water distribution on flow to tilted plate separator, surface load is 1m
3/ m
2h ~ 2m
3/ m
2h, the precipitated removal of suspended substance in tilted plate separator second 42 in waste water, waste water input final discharge pond 44 in tilted plate separator second 42 after precipitation, throw out in tilted plate separator second 42 under the driving of acid sludge transferpump 43 pump to sludge treating system, as shown in the e in Fig. 3, electrooxidation equipment second 45 is provided with the ferrous ion in further oxidized waste water and chlorion in final discharge pond 44, electrooxidation equipment second 45 electrode used is selected and is not consumed titanium base composition board, the control electric current of electrooxidation equipment second 45 is at 600A ~ 800A, waste water under the driving of reuse water pump 46 pump to reuse water pot 47, can be used for configuring milk of lime or ground watering etc., as shown in the g in Fig. 3.
Claims (10)
1., for a purification recovery device for cold rolling wastewater, comprise oil-contained waste water treatment system (100), alkaline oil-contained waste water treatment system (200) and acid waste water treatment system (300), it is characterized in that:
Oil-contained waste water treatment system (100) is made up of oily(waste)water equalizing tank (1), floating-oil collector (2), oil well pump (3), oily(waste)water transferpump (4), breakdown of emulsion groove (5), the first electro-flotation (6), the first Oil and slag scraping machine (7), waste oil collecting groove (8) and waste oil transferpump (9);
Floating-oil collector (2) is provided with in oily(waste)water equalizing tank (1), the bottom of oily(waste)water equalizing tank (1) is provided with wastewater outlet, the upper and lower of breakdown of emulsion groove (5) is respectively equipped with waterwater entrance and wastewater outlet, the first Oil and slag scraping machine (7) is provided with in first electro-flotation (6), the bottom of the first electro-flotation (6) side is provided with waterwater entrance, the upper and lower of the first electro-flotation (6) opposite side is respectively equipped with wastewater outlet and waste oil outlet, and the bottom of waste oil collecting groove (8) is provided with waste oil outlet;
The waste oil outlet of floating-oil collector (2) connects the fluid entrance of oil well pump (3) by oil pipe, the fluid of oil well pump (3) exports by oil pipe just to the notch of waste oil collecting groove (8), the wastewater outlet of oily(waste)water equalizing tank (1) connects the pump mouth of oily(waste)water transferpump (4) by water pipe, the water outlet of oily(waste)water transferpump (4) connects the waterwater entrance of breakdown of emulsion groove (5) by water pipe, the wastewater outlet of breakdown of emulsion groove (5) connects the waterwater entrance of the first electro-flotation (6) by water pipe, the waste oil of the first electro-flotation (6) exports by oil pipe just to the notch of waste oil collecting groove (8), the waste oil outlet of waste oil collecting groove (8) connects the oil pumping mouth of waste oil transferpump (9) by oil pipe,
Alkalescence oil-contained waste water treatment system (200) is by alkaline oily(waste)water equalizing tank (10), alkalescence oily(waste)water transferpump (11), one-level pH adjustment tank first (12), secondary pH adjustment tank first (13), stirrer first (14), stirrer second (15), preposition tempering tank (16), stirrer third (17), second electro-flotation (18), second Oil and slag scraping machine (19), intermediate pool (20), intermediate pool transferpump (21), cooling tower (22), biological contact oxidation pond (23), tempering tank first (24), flocculation tank first (25), stirrer fourth (26), stirrer penta (27), tilted plate separator first (28), alkaline sludge transferpump (29), alkalescence oily(waste)water discharge pond (30) and alkaline oily(waste)water emptying pump (31) composition,
The wastewater outlet of the first electro-flotation (6) passes through water pipe just to the Chi Kou of alkaline oily(waste)water equalizing tank (10), the wastewater outlet of alkalescence oily(waste)water equalizing tank (10) bottom connects one-level pH adjustment tank first (12) by the water pipe being in series with alkaline oily(waste)water transferpump (11), one-level pH adjustment tank first (12) and through setting adjacent with secondary pH adjustment tank first (13), the wastewater outlet of secondary pH adjustment tank first (13) connects preposition tempering tank (16) by water pipe, one-level pH adjustment tank first (12), stirrer first (14) is respectively equipped with in secondary pH adjustment tank first (13) and preposition tempering tank (16), stirrer second (15) and stirrer third (17), the wastewater outlet of preposition tempering tank (16) connects the waterwater entrance of the second electro-flotation (18) by water pipe, the second Oil and slag scraping machine (19) is provided with in second electro-flotation (18), the wastewater outlet of the second electro-flotation (18) passes through water pipe just to the Chi Kou of intermediate pool (20), the wastewater outlet of intermediate pool (20) completes through cooling tower (22) waterwater entrance connecting biological contact oxidation pond (23) after heat exchange obtains cooling by the water pipe that is in series with intermediate pool transferpump (21) at cooling tower (22), the wastewater outlet of biological contact oxidation pond (23) connects the waterwater entrance of tempering tank first (24) by water pipe, tempering tank first (24) and through setting adjacent with flocculation tank first (25), the wastewater outlet of flocculation tank first (25) connects the waterwater entrance of tilted plate separator first (28) by water pipe, stirrer fourth (26) and stirrer penta (27) is respectively equipped with in tempering tank first (24) and flocculation tank first (25), the wastewater outlet of tilted plate separator first (28) just discharges pond (30) to alkaline oily(waste)water by water pipe, the sediment discharge mouth of tilted plate separator first (28) connects sludge treating system by the water pipe being in series with alkaline sludge transferpump (29),
Acid waste water treatment system (300) is by acid waste water equalizing tank (32), acid waste water transferpump (33), one-level pH adjustment tank second (34), secondary pH adjustment tank second (35), electrooxidation equipment first (36), stirrer own (37), tempering tank second (38), flocculation tank second (39), stirrer heptan (40), stirrer pungent (41), tilted plate separator second (42), acid sludge transferpump (43), final discharge pond (44), electrooxidation equipment second (45), reuse water pump (46) and reuse water pot (47) composition,
The wastewater outlet of alkalescence oily(waste)water discharge pond (30) connects the waterwater entrance of acid waste water equalizing tank (32) by the water pipe being in series with alkaline oily(waste)water emptying pump (31), the wastewater outlet of acid waste water equalizing tank (32) connects the waterwater entrance of one-level pH adjustment tank second (34) by the water pipe being in series with acid waste water transferpump (33), one-level pH adjustment tank second (34) and through setting adjacent with secondary pH adjustment tank second (35), the wastewater outlet of secondary pH adjustment tank second (35) connects the waterwater entrance of tempering tank second (38) by water pipe, electrooxidation equipment first (36) and stirrer own (37) is respectively equipped with in one-level pH adjustment tank second (34) and secondary pH adjustment tank second (35), tempering tank second (38) and through setting adjacent with flocculation tank second (39), stirrer heptan (40) and stirrer pungent (41) is respectively equipped with in tempering tank second (38) and flocculation tank second (39), the wastewater outlet of flocculation tank second (39) connects the waterwater entrance of tilted plate separator second (42) by water pipe, the wastewater outlet of tilted plate separator second (42) by water pipe just to the Chi Kou finally discharging pond (44), the sediment discharge mouth of tilted plate separator second (42) connects sludge treating system by the water pipe being in series with acid sludge transferpump (43), electrooxidation equipment second (45) is provided with in final discharge pond (44), the wastewater outlet of final discharge pond (44) is by being in series with the water pipe of reuse water pump (46) just to the entrance of reuse water pot (47).
2., as claimed in claim 1 for the using method of the purification recovery device of cold rolling wastewater, comprise process oily(waste)water, process alkaline oily(waste)water and treatment of acidic wastewater, it is characterized in that: carry out successively as follows:
When a. processing oily(waste)water, emulsion and oily(waste)water first pump into oily(waste)water equalizing tank (1), add nitric acid in oily(waste)water equalizing tank (1) and breakdown of emulsion is implemented to emulsion and oily(waste)water, the waste oil collected of oily(waste)water equalizing tank (1) interior floating-oil collector (2) under the driving of oil well pump (3) pump to waste oil collecting groove (8), waste water in oily(waste)water equalizing tank (1) under the driving of oily(waste)water transferpump (4) pump to breakdown of emulsion groove (5), waste water in breakdown of emulsion groove (5) leaves standstill 1hour ~ 2hour after adding nitric acid and implements breakdown of emulsion, waste water after breakdown of emulsion groove (5) interior breakdown of emulsion inputs the first electro-flotation (6) and floats with further oil removing by micro-bubble, isolated waste oil input waste oil collecting groove (8) in first electro-flotation (6), in first electro-flotation (6), isolated waste water is delivered to alkaline oily(waste)water equalizing tank (10), add nitric acid in waste oil collecting groove (8) and breakdown of emulsion is implemented to waste oil, waste oil after waste oil collecting groove (8) interior breakdown of emulsion pumps under the driving of waste oil transferpump (9),
When b. processing alkaline oily(waste)water, in first electro-flotation (6), isolated waste water is delivered to alkaline oily(waste)water equalizing tank (10), waste water in alkalescence oily(waste)water equalizing tank (10) under the driving of alkaline oily(waste)water transferpump (11) pump in one-level pH adjustment tank first (12), waste water makes waste water ph after 6 ~ 8, input preposition tempering tank (16) by one-level pH adjustment tank first (12) and secondary pH adjustment tank first (13) to neutralize through two-stage successively, waste water in preposition tempering tank (16) adds water purification agent and flocculation agent, waste water in preposition tempering tank (16) after flocculation inputs the second electro-flotation (18) and removes impurity by micro-bubble floating, waste water input intermediate pool (20) after second electro-flotation (18) process, waste water in intermediate pool (20) under the driving of intermediate pool transferpump (21) pump to cooling tower (22), waste water is cooled to after not higher than 35 DEG C and inputs biological contact oxidation pond (23) enforcement microbiological deterioration in cooling tower (22), the bottom of biological contact oxidation pond (23) is provided with aeration tube and implements aeration aerating to waste water, biological contact oxidation pond (23) interior wastewater temperature is at 20 DEG C ~ 35 DEG C, pH value is 6 ~ 9, microbiological deterioration time 15hour, waste water input tempering tank first (24) after biological contact oxidation pond (23) interior microbiological deterioration, waste water is successively by tempering tank first (24) and flocculation tank first (25), flocculation tank first adds water purification agent and flocculation agent in (25), one-level pH adjustment tank first (12), secondary pH adjustment tank first (13), preposition tempering tank (16), stirrer first (14) in tempering tank first (24) and flocculation tank first (25), stirrer second (15), stirrer third (17), stirrer fourth (26) and stirrer penta (27) are by stirring waste water to improve governing speed, waste water input tilted plate separator first (28) in flocculation tank first (25) after flocculation, the precipitated removal of suspended substance in tilted plate separator first (28) in waste water, waste water in tilted plate separator first (28) after precipitation inputs alkaline oily(waste)water discharge pond (30), throw out in tilted plate separator first (28) under the driving of alkaline sludge transferpump (29) pump to sludge treating system, waste water in alkalescence oily(waste)water discharge pond (30) under the driving of alkaline oily(waste)water emptying pump (31) pump to acid waste water equalizing tank (32),
C. during treatment of acidic wastewater, waste water pump in alkalescence oily(waste)water discharge pond (30) is to acid waste water equalizing tank (32), waste water in acid waste water equalizing tank (32) under the driving of acid waste water transferpump (33) pump in one-level pH adjustment tank second (34), waste water makes waste water ph after 6 ~ 8, input tempering tank second (38) by one-level pH adjustment tank second (34) and secondary pH adjustment tank second (35) to neutralize through two-stage successively, electrooxidation equipment first (36) is provided with the ferrous ion in oxidized waste water and chlorion in one-level pH adjustment tank second (34), waste water is successively by tempering tank second (38) and flocculation tank second (39), flocculation tank second adds water purification agent and flocculation agent in (39), secondary pH adjustment tank second (35), stirrer in tempering tank second (38) and flocculation tank second (39) oneself (37), stirrer heptan (40) and stirrer pungent (41) are by stirring waste water to improve governing speed, waste water input tilted plate separator second (42) in flocculation tank second (39) after flocculation, the precipitated removal of suspended substance in tilted plate separator second (42) in waste water, pond (44) is finally discharged in waste water input in tilted plate separator second (42) after precipitation, throw out in tilted plate separator second (42) under the driving of acid sludge transferpump (43) pump to sludge treating system, electrooxidation equipment second (45) is provided with the ferrous ion in further oxidized waste water and chlorion in final discharge pond (44), waste water under the driving of reuse water pump (46) pump to reuse water pot (47).
3. as claimed in claim 2 for the using method of the purification recovery device of cold rolling wastewater, it is characterized in that: the first electro-flotation (6), the second electro-flotation (18), electrooxidation equipment first (36) and electrooxidation equipment second (45) electrode used is all selected and do not consumed titanium base composition board; The control electric current of the first electro-flotation (6) and the second electro-flotation (18) is at 200A ~ 400A; The control electric current of electrooxidation equipment first (36) and electrooxidation equipment second (45) is at 600A ~ 800A.
4. as claimed in claim 2 or claim 3 for the using method of the purification recovery device of cold rolling wastewater, it is characterized in that: during a step process oily(waste)water, in breakdown of emulsion groove (5) by steam heating to control wastewater temperature at 60 DEG C ~ 70 DEG C, the mass percent concentration adding breakdown of emulsion groove (5) interior nitric acid is 46%, and the add-on of nitric acid is 1% ~ 3% of wastewater quality.
5. as claimed in claim 2 or claim 3 for the using method of the purification recovery device of cold rolling wastewater, it is characterized in that: during the b step alkaline oily(waste)water of process and when c walks treatment of acidic wastewater, the multipolymer of aluminium chlorohydroxide and alkali formula iron protochloride all selected by water purification agent used, the mass percent concentration of water purification agent is 10%, and the add-on of water purification agent adds 1mg ~ 5mg for often liter of waste water; Flocculation agent used all selects polyacrylamide, and the mass percent concentration of flocculation agent is 0.1% ~ 0.15%, and the add-on of flocculation agent adds 1mg ~ 10mg for often liter of waste water.
6. as claimed in claim 4 for the using method of the purification recovery device of cold rolling wastewater, it is characterized in that: during the b step alkaline oily(waste)water of process and when c walks treatment of acidic wastewater, the multipolymer of aluminium chlorohydroxide and alkali formula iron protochloride all selected by water purification agent used, the mass percent concentration of water purification agent is 10%, and the add-on of water purification agent adds 1mg ~ 5mg for often liter of waste water; Flocculation agent used all selects polyacrylamide, and the mass percent concentration of flocculation agent is 0.1% ~ 0.15%, and the add-on of flocculation agent adds 1mg ~ 10mg for often liter of waste water.
7. as claimed in claim 2 or claim 3 for the using method of the purification recovery device of cold rolling wastewater, it is characterized in that: tilted plate separator second (42) used when tilted plate separator first (28) used and c step treatment of acidic wastewater during b step process alkaline oily(waste)water, all select uniform water distribution on flow to tilted plate separator, surface load is 1m
3/ (m
2h) ~ 2m
3/ (m
2h).
8. as claimed in claim 4 for the using method of the purification recovery device of cold rolling wastewater, it is characterized in that: tilted plate separator second (42) used when tilted plate separator first (28) used and c step treatment of acidic wastewater during b step process alkaline oily(waste)water, all select uniform water distribution on flow to tilted plate separator, surface load is 1m
3/ (m
2h) ~ 2m
3/ (m
2h).
9. as claimed in claim 5 for the using method of the purification recovery device of cold rolling wastewater, it is characterized in that: tilted plate separator second (42) used when tilted plate separator first (28) used and c step treatment of acidic wastewater during b step process alkaline oily(waste)water, all select uniform water distribution on flow to tilted plate separator, surface load is 1m
3/ (m
2h) ~ 2m
3/ (m
2h).
10. as claimed in claim 6 for the using method of the purification recovery device of cold rolling wastewater, it is characterized in that: tilted plate separator second (42) used when tilted plate separator first (28) used and c step treatment of acidic wastewater during b step process alkaline oily(waste)water, all select uniform water distribution on flow to tilted plate separator, surface load is 1m
3/ (m
2h) ~ 2m
3/ (m
2h).
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