CN102642961B - Reuse treatment method for industrial wastewater from refrigerator compressor factory - Google Patents
Reuse treatment method for industrial wastewater from refrigerator compressor factory Download PDFInfo
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- CN102642961B CN102642961B CN2012101466175A CN201210146617A CN102642961B CN 102642961 B CN102642961 B CN 102642961B CN 2012101466175 A CN2012101466175 A CN 2012101466175A CN 201210146617 A CN201210146617 A CN 201210146617A CN 102642961 B CN102642961 B CN 102642961B
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Abstract
The invention relates to a reuse treatment method for industrial wastewater from a refrigerator compressor factory. Firstly, independently collected emulsified bath solution wastewater is acidified and demulsified, free oil and emulsified oil in the wastewater are eliminated, and then the wastewater is subjected to Fe<2+>/H2O2 oxidation, the effluent pH is 7-8, and then coagulant aid is added forcoagulation sedimentation, and organic matter, metal salt and SS are removed, so that emulsified bath solution water is obtained. Subsequently, the emulsified bath solution water and the independently collected rinsing wastewater are uniformly mixed according to the ratio of 1:20-30 to serve as the source water for micro filter membrane treatment; the source water is subjected to air floatation oil separation dephosphorization, coagulation and activated carbon adsorption to obtain water with the pH value of 9-10 under micro filtration, and then the water under micro filtration enters the micro filter membrane, so clean water is obtained; and the clean water and tap water are mixed according to the ratio of 1:1-2, are subjected to filtering by activated carbon and 5um precise filtration and enter a reverse osmosis membrane, and then pure water is obtained after desalination, and the pure water can be reused for production. With the reuse treatment method, the water quality of reused water is stable and can reach the standard of pure water used by enterprises for production, the water is reused for a product line, so that the wastewater discharge of the enterprises is greatly reduced, the use volume of tap water is saved, and remarkable economical and social benefits are achieved.
Description
Technical field
The present invention relates to a kind of freezer compressor factory industrial effluent reusing treatment process.Belong to the Recycle Technology of Waste Water field.
Technical background
Freezer compressor relates to numerous techniques such as comprising pickling iron and steel purification, mechanical cutting processing, metal phosphorizing, surperficial adjustment, cathode electrophoretic coating, metal heat treatmet, plating and surface treatment, cleaning in manufacturing processed.Each production and processing technology often all needs a large amount of tap water or pure water, ultrapure water to participate in, and also produces a large amount of waste water simultaneously.The waste water that freezer compressor manufacturing processing produces is because production technique is different, and the composition of the waste water of generation is also different.Wherein, the contaminated wastewater material that produces in mechanical cutting processing, metal phosphorizing degreasing, plating, the technological process such as antirust is various, comprise mineral oil, cutting fluid, all kinds of emulsifying agents, lubricant, rust-preventive agent and various tensio-active agent, the heavy metals such as various pigment, dyestuff, coating, paint vehicle, all kinds of alcohol, aldehyde, ether, ketone, benzene series, naphthalene series organic compound and copper, zinc, manganese, this tank liquor waste water is difficult, biodegradability is poor.Clean after pickling iron and steel, surface cleaning and the phosphatization degreasing etc. in the Cleaning Wastewater that cleaning produces that the pollution substance composition is simple and content is low, easily process.
The waste water that at present freezer compressor manufacturing produces generally is to process through following steps: regrowth oxidation after first coagulation, the air supporting, enter to the municipal wastewater pipe network after reaching country or local enterprise's emission standard of stipulating, and freezer compressor factory is not further processed as being back to production.Do not find freezer compressor manufacturing concern waste water recycling in the report of producing yet.In recent years, the water globe environment goes from bad to worse, and water resources shortage has become worldwide trend, and the shortage of some regional water resourcess maybe will restrict the development of modern industry.The freezer compressor manufacturing is to need water rich and influential family and blowdown rich and influential family, water and need the contradiction of water more outstanding in this field, and reuse after its wastewater treatment is to the development in freezer compressor manufacturing concern future and to alleviate global water resources contradiction Significance for Environment great.
Summary of the invention
The purpose of this invention is to provide a kind of energy economical and efficient ground and remove the method that freezer compressor is made oils, tensio-active agent and other objectionable impurities in the waste water, realize waste water recycling.
In order to achieve the above object, the present invention studies and tests the removal method of oils, tensio-active agent and other objectionable impurities in the waste water of making the freezer compressor generation, find to adopt inexpensive commercially available wilkinite, and search out under pH=2～4 conditions, adsorptive capacity can significantly improve, can provide for follow-up purification possibility in conjunction with emulsion splitter calcium chloride, alum and PAM etc., concrete technology is as follows:
The first step, categorised collection.Industry Waste moisture two classes with the generation of freezer compressor manufacturing processed, one class be that the water yield is little, concentration is high and the machine cut of complicated component with after emulsion and the tank liquor waste water that produces of phosphatization, degreasing, antirust job shop, referred to as emulsification, tank liquor waste water, centralized collection is in emulsion, tank liquor collecting tank; Another kind of is the little and simple waste water of composition of the large concentration of the water yield that produces such as to clean after pickling iron and steel, surface cleaning and the phosphatization degreasing, is called Cleaning Wastewater, merges after the centralized collection that pre-treatment obtains in emulsification, the tank liquor water through second step.
Second step carries out pre-treatment to emulsification, tank liquor waste water and obtains emulsification, tank liquor water.First emulsification, tank liquor waste water were stopped 2～3 days in emulsification, tank liquor collecting tank, make the solid precipitation of suspension, recycle rear recycling with the belt oil extracting machine after the oil slick floating of dispersion; Pump into the Production Wastewater By Combined Acidification And Demulsification pond with having removed the oil slick of dispersion and the waste water of solid, add sulfuric acid, the dosage of sulfuric acid reaches 2～4 with the pH of waste water and is as the criterion, add again calcium chloride, alum and wilkinite and carry out Production Wastewater By Combined Acidification And Demulsification, aeration agitation added PAM after 50 minutes, weak aeration agitation 5 minutes, leave standstill 30 minutes after, supernatant liquid is passed into oil trap, and lower floor's mud is delivered to sludge thickener and is focused on;
Above-mentioned calcium chloride dosage is the 0.10-0.12% that has removed the waste water weight of the oil slick that disperses and solid; First it is mixed with the calcium chloride solution of 20% weight percent concentration, adds again; The alum dosage is the 0.15-0.17% that has removed the waste water weight of the oil slick that disperses and solid, first it is mixed with the alum solution of 10% weight percent concentration, adds again; Bentonitic dosage is the 0.2-0.3% that has removed the waste water weight of the oil slick that disperses and solid;
Oil slick in the supernatant liquid behind the acidified breakdown of emulsion under the pressurized air reliever effect of being equipped with in oil trap, is concentrated and is swum in the oil trap surface, collects the supernatant liquid that obtains behind the oil slick with waste oil collecting barrel and enters Fe
2+/ H
2O
2Then oxidation pond adds FeSO
4And H
2O
2Stir, carried out catalytic oxidation 50～70 minutes, degrade and enter coagulation basin behind most of organism, in coagulation basin, add NaOH, the NaOH dosage is as the criterion so that pH is transferred to 7～8, then add coagulant aids PAM, the PAM dosage is for collecting the 0.05-0.07% of the supernatant liquid weight that obtains behind the oil slick, enter the inclined plate sedimentation pond after the aeration agitation, hydraulic detention time is 2 hours, and clear liquid is emulsification, tank liquor water after the sedimentation, emulsification, tank liquor water enter first emulsification, tank liquor pond, pass into to carry out the aeration mixing in the Cleaning Wastewater pond again; Lower floor's mud is delivered to sludge thickener and is focused on;
Above-mentioned FeSO
4Dosage is the 0.2-0.3% that collects the weight of the supernatant liquid behind the oil slick, first it is mixed with the FeSO of 20% weight percent concentration
4Solution adds again; Above-mentioned H
2O
2Dosage is the 0.15-0.17% that collects the weight of the supernatant liquid behind the oil slick, first it is mixed with the H of 30% weight percent concentration
2O
2Solution adds again;
In the 3rd step, emulsification, tank liquor water aeration are mixed to get the source water that microfiltration membrane is processed, and measure by volume first emulsification, tank liquor water: the Cleaning Wastewater that the first step is collected=1: 20～30, and aeration makes it mix the source water of processing as next step microfiltration membrane again;
The 4th step, source water oil removing dephosphorization coagulating obtains treating micro-filtration water, be that 20m3/h pumps into high-order air supporting oil trap with the source water that mixes by flow, the pressurized air reliever is housed in the air supporting oil trap, be collected into waste oil collecting barrel after making the oil slick floating, source water after the air supporting oil removal is processed enters pH regulator pond I, add NaOH pH is controlled at 9～10, add calcium chloride, mechanical stirring is mixed the phosphorus in the water of removal source, the I water outlet of pH regulator pond enters pH regulator pond II, add NaOH pH is controlled at 9～10, add again polymeric aluminium chlorohydroxide, stir, carry out entering the circulation concentration basin behind the coagulating, measure the Powdered Activated Carbon of the 0.06-0.08% of source water weight, the Powdered Activated Carbon solution that its preparation is become 30% weight percent concentration is added in the circulation concentration basin, obtains treating micro-filtration water with the membrane contaminant matter such as organism of removing in the waste water, and lower floor's mud is delivered to sludge thickener and focused in the circulation concentration basin;
Above-mentioned calcium chloride dosage is the 0.10-0.15% of source water weight, and the calcium chloride solution that first it is mixed with 20% weight percent concentration adds again;
Above-mentioned polymeric aluminium chlorohydroxide dosage is the 0.10-0.15% of source water weight, and the polymeric aluminium chlorohydroxide solution that first it is mixed with 20% weight percent concentration adds again;
The 5th step, treat that micro-filtration water obtains asking water through micro-filtrate membrane filtration, the micro-filtration water for the treatment of in the circulation concentration basin in the 4th step is pumped into the DF-415 type micro-filtration membrane module of U.S. Duraflow company, filter at pressure 0.08MPa～0.25MPa, concentrate recirculation filters to the concentration basin recirculation that circulates, and the clear water that the micro-filtration assembly obtains after filtering enters reverse osmosis source water tank;
The 6th step, clear water is through reuse after the reverse osmosis desalination, in the water tank of reverse osmosis source, first micro-filtration assembly clear water is out mixed with tap water, ratio of mixture is clear water: tap water=1: 1～1: 2 by volume, behind the mixing, pump into full-automatic activated charcoal filter by topping-up pump, water outlet automatic feeding reverse osmosis scale inhibitor special, after 5 μ m accurate filters filter, pump into secondary HYDRANAUTICS company pollution-resistant reverse osmosis membrane LFC3-LD unit by high-pressure pump, under pressure 1MPa～2MPa, carry out desalting treatment, obtain meeting the pure water of production line requirement, pure water enters pure water tank, be back to production line, dense water is back to the Cleaning Wastewater pond, and the saturating salt rate of reverse osmosis stdn surpasses 5% laggard column criterion reverse osmosis and cleans.
The CODcr of the emulsion in the emulsification of the above-mentioned the first step, the tank liquor waste water is 80000-100000, and BOD5 is 10000-120000, and petroleum-type is 2000-3000, pH=9, SS=50mg/L.
The CODcr of the tank liquor in the emulsification of the above-mentioned the first step, the tank liquor waste water is 4000-6000, BOD
5Be 1000, petroleum-type is 700, pH=4, Mn=150mg/L, Zn=20mg/L, total P=150mg/L, SS=50mg/L.
The CODcr of the Cleaning Wastewater of the above-mentioned the first step is 200-300, BOD
5Be 20-50, petroleum-type is 30, pH=6-9, and Mn is less than 2mg/L, and Zn is less than 5mg/L, total P=5-10mg/L, SS=20mg/L.
In the above-mentioned second step emulsification, tank liquor waste water are carried out pretreated Production Wastewater By Combined Acidification And Demulsification pond and inclined plate sedimentation pond, and the 4th the step, source water oil removing dephosphorization coagulating in the circulation concentration basin, lower floor's mud at three places, delivering to that sludge thickener focuses on is to adopt Hangzhou Xing Yuan X
AZ30/800-U
BThe type pressure filter, by the press filtration of hydraulic efficiency plant automatic pressure-maintaining, press filtration water returns in the emulsion, tank liquor collecting tank of the first step; Recycling after clod is processed.
The present invention has following advantage and effect:
1, because the present invention divides two classes to collect waste water, to carrying out pre-treatment after the high and complicated emulsification of concentration, the tank liquor wastewater collection, the compartment barricade of establishing by emulsification, tank liquor collecting tank top, remove the dispersed oil and the part that float in emulsification, the tank liquor waste water and take off steady oil in water emulsion, greatly reduce COD value and the oil-contg of emulsification, tank liquor waste water.
2, because the present invention adds wilkinite and oil in water emulsion in the waste water is carried out Production Wastewater By Combined Acidification And Demulsification when carrying out pre-treatment after to emulsification, tank liquor wastewater collection, and pH is adjusted to 2～4, therefore, tank liquor, emulsifying waste water are after Production Wastewater By Combined Acidification And Demulsification and wilkinite absorption, the organic matter removal such as oil in water emulsion and tensio-active agent effect is remarkable, through mensuration in the waste water COD clearance can reach 60%-80% or more than, most of phosphorus also is removed.
3, owing to adopting Fe when carrying out pre-treatment after the emulsification of the present invention, tank liquor wastewater collection
2+/ H
2O
2Oxidation makes the organic substance of the complexity of difficult degradation in tank liquor, the emulsifying liquid waste water be degraded into simple organism and inorganic salt to a great extent, and the COD in the waste water more than 50% is removed.Thereafter coagulant precipitation can reduce turbidity, the heavy metal content of waste water greatly.
4, owing to adding calcium chloride after the Cleaning Wastewater of the pretreated emulsification of the present invention, tank liquor water and the first step collection is mixed, process again through coagulation, charcoal absorption that water outlet COD value is low after DF-415 type microfiltration membrane (its filtration efficiency and filtration yield are the twices of the common filter membrane) filtration of 0.1 micron U.S. Duraflow company, turbidity is almost nil, specific conductivity and satisfies the feed water by reverse osmosis water quality requirement after tap water mixed in 1: 1～1: 2 fully below 2000 μ s/cm.
5, the gas backwash pressure was about 0.5MPa from employing the pressurized air backwash 1 minute in 10 minutes for the every operation of microfiltration membrane of the present invention.Microfiltration membrane was moved about a week, after the membrane flux decline 70%, the stoppage in transit manual cleaning, about pressure 0.5MPa, used respectively 3%～5% sulfuric acid wash cycles 60 minutes, with clear water wash cycles 10 minutes, again with about 5% clorox wash cycles 60 minutes and soaked after 2 hours the recirculation operation 10 minutes, then use clear water wash cycles 5 minutes stand-by, therefore, membrane flux can recover 90%～100%.
6, because reverse osmosis of the present invention reduces by 10% or more in water production rate, water inlet and dense differential water pressures have risen 15% and the saturating salt rate increase of reverse osmosis 5% when above, clean down about pressure 0.3MPa with reverse osmosis produced water and by 0.1%NaOH, 2.0% citric acid and 0.025% sodium laurylsulfonate salt that reverse osmosis produced water is prepared, therefore, guarantee that water outlet reaches the reuse index.
7, the waste water that produces in the freezer compressor manufacturing processed of the present invention realizes that the treatment process of reuse is the inexpensive materials such as employing wilkinite, and therefore, the method has great economic benefit and social, environmental benefit.
Description of drawings
Fig. 1 is process flow diagram of the present invention.
Embodiment
The invention is further illustrated by the following examples.
Be treated to example with Jiaxing freezer compressor manufacturing concern waste water recycling, technical process is by shown in Figure 1.The waste water that the freezer compressor manufacturing processed produces divides two classes to collect through tank liquor, two collecting tanks in emulsified liquid collection pond and Cleaning Wastewater pond: respectively the water yield is little, concentration is high and the machine cut of complicated component with after emulsion and the tank liquor waste water that produces of phosphatization, degreasing, antirust job shop, referred to as emulsification, tank liquor wastewater collection in tank liquor, emulsified liquid collection pond; Another kind of is the little and simple wastewater collection of composition of the large concentration of the water yield that produces such as to clean after pickling iron and steel, surface cleaning and the phosphatization degreasing in the Cleaning Wastewater pond.Table 1 is Jiaxing freezer compressor manufacturing concern waste water water yield and water quality.
Table 1 certain the freezer compressor manufacturing concern waste water water yield and water quality
Second step with the emulsification in emulsion, the tank liquor collecting tank, tank liquor waste water, stopped 2～3 days, made suspended solids precipitation, with the belt oil extracting machine dispersed oil and the oil slick of floating was removed, and isolated behind the oil slick with pneumatic diaphragm pump with 2.5m
3/ h, with emulsification, the tank liquor waste water lifting is to the Production Wastewater By Combined Acidification And Demulsification pond, the Production Wastewater By Combined Acidification And Demulsification tankage is 10t, unlatching by online tank gage control pump, add sulfuric acid, online pH monitor control pH is 2～4, add simultaneously concentration and be 20% emulsion splitter calcium chloride 12L, 10% alum 17L and wilkinite 30kg carry out Production Wastewater By Combined Acidification And Demulsification, aeration agitation adds 0.1L PAM after 50 minutes, aeration agitation left standstill after 5 minutes 30 minutes, was L3000 * W2000 * H2000mm with pneumatic pump with supernatant liquid continuance lifting to overall dimensions, the bottom is the oil trap of combining of cone (being convenient to mud collects), Fe
2+/ H
2O
2In oxidation pond and the coagulation basin.Fe
2+/ H
2O
2Add 20%FeSO in the oxidation pond
4, dosage is 30L, 30%H
2O
2, dosage is 15L, mechanical stirring mixed oxidization reaction 60 minutes.Fe
2+/ H
2O
2Oxidation pond water outlet overflow enters coagulation basin, automatic feeding 30%NaOH in the coagulation basin, be controlled at 7～8 by online pH monitor, the amount that adds coagulant aids PAM is 5L, the coagulation basin water outlet entered the inclined plate sedimentation pond after air-blowing was stirred, hydraulic detention time is 2 hours, and clear liquid enters emulsification, the tank liquor pond becomes emulsification, tank liquor water (water quality components please be seen table 2), passes into to carry out the aeration mixing in the Cleaning Wastewater pond again; Lower floor's mud is delivered to sludge thickener and is focused on.
In the 3rd step, measure by volume first emulsification, the tank liquor water that second step obtains: the Cleaning Wastewater that the first step is collected=1: 20～30, aeration makes it mix the source water of processing as next step microfiltration membrane again;
In the 4th step, source water is promoted to high-order air supporting oil trap by self-sucking non-plugging dredge pump again, and flow is 20m
3/ h is equipped with the pressurized air reliever in the oil trap, make the oil slick floating, and oil slick can be put to waste oil collecting barrel by manually opened ball valve.Waste water enters capacity after oil removal is processed be 9m
3PH regulator pond I, automatic feeding 30%NaOH transfers to 8～9 with pH, and adds 20% calcium chloride 20L/h, mechanical stirring is mixed, it is 9m that the water outlet overflow enters pH regulator pond II capacity
3, automatic feeding 30%NaOH, pH is controlled at 9～10, adds 20% polymeric aluminium chlorohydroxide 20L/h and carries out coagulating, and mechanical stirring is mixed, and it is 9m that the II water overflow of pH regulator pond enters circulation concentration basin capacity
3, adding 30% Powdered Activated Carbon 12L/h, the membrane contaminant matter such as organism of removing in the waste water obtain treating micro-filtration water, lower floor's mud is delivered to sludge thickener and is focused in the circulation concentration basin.
The 5th step; treat that micro-filtration water obtains asking water through micro-filtrate membrane filtration; the micro-filtration water for the treatment of in the circulation concentration basin in the 4th step is pumped into the DF one 415 type micro-filtration membrane modules of U.S. Duraflow company; filter at pressure 0.08MPa～0.25MPa; concentrate recirculation to the concentration basin recirculation that circulates is filtered; the clear water (water quality components please be seen table 2) that the micro-filtration assembly obtains after filtering; enter reverse osmosis source water tank; 2 groups of microfiltration membrane, a preparation and a use, every operation automatic gas back flushing in 10 minutes 1 minute; backwashing pressure is 0.5MPa; the membrane flux 70% rear shutdown matting that descends is cleaned with sulfuric acid and clorox and tap water respectively under 0.5MPa, and membrane flux can recover 90% to 100%.
Table 2 is emulsification, tank liquor water, clear water water quality
In the 6th step, micro-filtration assembly clear water out mixed with tap water in 1: 1 by volume～1: 2, pressed 22m by topping-up pump
3/ h pumps into full-automatic activated charcoal filter (1200 * 2400H), filtering velocity is 9.7m/h, water outlet automatic feeding reverse osmosis scale inhibitor special 0.012kg/h, after 5 μ m accurate filters filter, pump into secondary HYDRANAUTICS company pollution-resistant reverse osmosis membrane LFC3-LD unit by high-pressure pump, be to carry out desalting treatment under the 1.6MPa at pressure, reverse osmosis water outlet water quality sees Table 3, reverse osmosis water outlet satisfies the technological standard that freezer compressor is made the processing pure water fully, be stored in the pure water tank, for the production of reuse.Reverse osmosis concentrated water is back to the Cleaning Wastewater pond, uses again.
The saturating salt rate of reverse osmosis stdn surpasses 5% laggard column criterion reverse osmosis and cleans.
Mud in the circulation concentration basin, in the Production Wastewater By Combined Acidification And Demulsification pond and the inclined plate sedimentation pond all pumps into sludge thickener automatically by pneumatic pump, pumps into Hangzhou Xing Yuan X by the manual activation sludge pump when mud liquid level is high in the sludge thickener
AZ30/800-U
BThe type pressure filter, by the press filtration of hydraulic efficiency plant automatic pressure-maintaining, recycling after clod is processed after the press filtration, press filtration water enters emulsion, tank liquor collecting tank.
Table 3 is reverse osmosis water outlet (pure water) water quality.
Claims (4)
1. freezer compressor factory industrial effluent reusing treatment process is characterized in that:
The first step is collected freezer compressor factory Industry Waste moisture two classes,
One class is emulsification, tank liquor waste water, comprise machine cut with after emulsion and the tank liquor waste water that produces of phosphatization, degreasing, antirust job shop, with their centralized collection in emulsion, tank liquor collecting tank;
Another kind of is the Cleaning Wastewater that pickling iron and steel, surface cleaning and phosphatization degreasing produce, and merges to after the centralized collection that pre-treatment obtains in emulsification, the tank liquor water through second step;
Second step carries out pre-treatment to emulsification, tank liquor waste water and obtains emulsification, tank liquor water
First emulsification, tank liquor waste water were stopped 2～3 days in emulsification, tank liquor collecting tank, make the solid precipitation of suspension, the oil slick floating of dispersion, oil slick recycles with the recycling of belt oil extracting machine is rear; The waste water of having removed oil slick and solid pumps into the Production Wastewater By Combined Acidification And Demulsification pond, add sulfuric acid, the dosage of sulfuric acid reaches 2～4 with the pH of waste water and is as the criterion, add again calcium chloride, alum and wilkinite and carry out Production Wastewater By Combined Acidification And Demulsification, aeration agitation added PAM after 50 minutes, and aeration agitation is 5 minutes again, left standstill 30 minutes, at last supernatant liquid is passed into oil trap, lower floor's mud is delivered to sludge thickener and is focused on;
Above-mentioned calcium chloride dosage is the 0.10-0.12% that has removed the waste water weight of oil slick and solid; First it is mixed with the calcium chloride solution of 20% weight percent concentration, adds again;
Above-mentioned alum dosage is the 0.15-0.17% that has removed the waste water weight of oil slick and solid, first it is mixed with the alum solution of 10% weight percent concentration, adds again;
Above-mentioned bentonitic dosage is the 0.2-0.3% that has removed the waste water weight of oil slick and solid;
Under the pressurized air reliever effect of supernatant liquid behind the acidified breakdown of emulsion in oil trap, oil slick is wherein concentrated the surface swim in oil trap, and the supernatant liquid of collecting behind the oil slick with waste oil collecting barrel enters Fe
2+/ H
2O
2Then oxidation pond adds FeSO
4And H
2O
2Stir, carried out catalytic oxidation 50～70 minutes, degrade and enter coagulation basin behind most of organism, in coagulation basin, add NaOH, the NaOH dosage is as the criterion so that pH is transferred to 7～8, then add coagulant aids PAM, the PAM dosage is for collecting the 0.05-0.07% of the supernatant liquid weight behind the oil slick, enter the inclined plate sedimentation pond after the aeration agitation, hydraulic detention time is 2 hours, and the clear liquid after the sedimentation is emulsification, tank liquor water, enter first emulsification, tank liquor pond, pass into again and carry out the aeration mixing in the Cleaning Wastewater pond; Lower floor's mud is delivered to sludge thickener and is focused on;
Above-mentioned FeSO
4Dosage is the 0.2-0.3% that collects the weight of the supernatant liquid behind the oil slick, first with FeSO
4Be mixed with the FeSO of 20% weight percent concentration
4Solution adds again;
Above-mentioned H
2O
2Dosage is the 0.15-0.17% that collects the weight of the supernatant liquid behind the oil slick, first with H
2O
2Be mixed with the H of 30% weight percent concentration
2O
2Solution adds again;
In the 3rd step, emulsification, tank liquor water aeration are mixed to get the source water that microfiltration membrane is processed
Measure by volume first emulsification, tank liquor water: the Cleaning Wastewater that the first step is collected=1: 20～30, aeration makes it mix the source water of processing as next step microfiltration membrane again;
In the 4th step, source water oil removing dephosphorization coagulating obtains treating micro-filtration water
Be 20m with the source water that mixes by flow
3/ h pumps into high-order air supporting oil trap, the pressurized air reliever is housed in the air supporting oil trap, be collected into waste oil collecting barrel after making the oil slick floating, source water after the air supporting oil removal is processed enters pH regulator pond I, add NaOH and calcium chloride, mechanical stirring is mixed the phosphorus in the water of removal source, the I water outlet of pH regulator pond enters pH regulator pond II, add NaOH, add again polymeric aluminium chlorohydroxide, stir, carry out entering the circulation concentration basin behind the coagulating, measure the Powdered Activated Carbon of the 0.06-0.08% of source water weight, the Powdered Activated Carbon solution that its preparation is become 30% weight percent concentration is added in the circulation concentration basin, obtain treating micro-filtration water to remove the organism that in the waste water film is polluted, lower floor's mud is delivered to sludge thickener and is focused in the circulation concentration basin;
Above-mentioned calcium chloride dosage is the 0.10-0.15% of source water weight, and the calcium chloride solution that first it is mixed with 20% weight percent concentration adds again;
Above-mentioned polymeric aluminium chlorohydroxide dosage is the 0.10-0.15% of source water weight, and the polymeric aluminium chlorohydroxide solution that first it is mixed with 20% weight percent concentration adds again;
Above-mentioned NaOH dosage is source water pH to be controlled at 9～10 be as the criterion;
In the 5th step, treat that micro-filtration water obtains clear water through micro-filtrate membrane filtration
The micro-filtration water for the treatment of in the circulation concentration basin in the 4th step is pumped into the DF-415 type micro-filtration membrane module of U.S. Duraflow company, filter at pressure 0.08MPa～0.25MPa, concentrate recirculation filters to the concentration basin recirculation that circulates, and the clear water that the micro-filtration assembly obtains after filtering enters reverse osmosis source water tank;
In the 6th step, clear water is through reuse after the reverse osmosis desalination
In the water tank of reverse osmosis source, first micro-filtration assembly clear water is out mixed by volume with tap water, clear water: tap water=1: 1～1: 2 volume, behind the mixing, pump into full-automatic activated charcoal filter by topping-up pump, behind the water outlet automatic feeding reverse osmosis scale inhibitor special, after 5 μ m accurate filters filter, pump into reverse osmosis membrane by high-pressure pump, be to carry out desalting treatment under 1MPa～2MPa at pressure, obtain meeting the pure water of production line requirement, pure water enters pure water tank, be back to production line, dense water is back to the Cleaning Wastewater pond; The saturating salt rate of reverse osmosis stdn surpasses 5% laggard column criterion reverse osmosis and cleans;
Above-mentioned reverse osmosis membrane is the resistant to pollution LFC3-LD type reverse osmosis membrane that Hydranautics produces.
2. freezer compressor according to claim 1 factory industrial effluent reusing treatment process, it is characterized in that: the CODcr of the emulsion in the emulsification of the described the first step, the tank liquor waste water is 80000-100000mg/L, BOD
5Be 10000-120000mg/L, petroleum-type is 2000-3000mg/L, pH=9, SS=50mg/L.
3. freezer compressor according to claim 1 factory industrial effluent reusing treatment process, it is characterized in that: the CODcr of the tank liquor waste water in the emulsification of the described the first step, the tank liquor waste water is 4000-6000mg/L, BOD
5Be 1000mg/L, petroleum-type is 700mg/L, pH=4, Mn=150mg/L, Zn=20mg/L, total P=150mg/L, SS=50mg/L.
4. freezer compressor according to claim 1 factory industrial effluent reusing treatment process, it is characterized in that: the CODcr of the Cleaning Wastewater of the described the first step is 200-300mg/L, BOD
5Be 20-50mg/L, petroleum-type is 30mg/L, and pH=6-9, Mn be less than 2mg/L, and Zn is less than 5mg/L, total P=5-10mg/L, SS=20mg/L.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101466175A CN102642961B (en) | 2012-05-11 | 2012-05-11 | Reuse treatment method for industrial wastewater from refrigerator compressor factory |
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| CN102910765B (en) * | 2012-11-20 | 2013-12-04 | 安徽新天环保科技有限公司 | Demulsifying and flocculating treatment method of machining cutting fluid sewage water |
| CN103055764A (en) * | 2013-01-31 | 2013-04-24 | 灵宝华鑫铜箔有限责任公司 | Activated carbon adding method in copper foil production |
| CN103896428B (en) * | 2014-01-28 | 2016-01-13 | 青岛新天地固体废物综合处置有限公司 | A kind of high COD, multiple types waste emulsified mixture breaking device and breaking method thereof |
| CN105330095A (en) * | 2015-10-16 | 2016-02-17 | 安徽省巢湖铸造厂有限责任公司 | Regeneration reuse method for phosphorization wastewater |
| CN106630246A (en) * | 2015-11-02 | 2017-05-10 | 张家港格林台科环保设备有限公司 | Waste emulsion demulsification processing method |
| CN106186551A (en) * | 2016-08-25 | 2016-12-07 | 常州市锦云工业废弃物处理有限公司 | A kind of multipurpose wastewater treatment equipment processing equipment |
| CN107162301A (en) * | 2017-06-01 | 2017-09-15 | 冯合生 | Cutting fluid recovery and processing system and processing method |
| CN107176707A (en) * | 2017-06-26 | 2017-09-19 | 嘉兴英施特环保科技有限公司 | Machine cutting fluid waste liquid treatment for reuse technique and system |
| CN107601774A (en) * | 2017-10-18 | 2018-01-19 | 厦门东江环保科技有限公司 | High-concentration emulsified liquid processing method and processing system |
| CN108911014A (en) * | 2018-08-29 | 2018-11-30 | 苏州科特环保股份有限公司 | A kind of recyclable device and method of P containing sludge inhibitor |
| CN112607962A (en) * | 2020-12-04 | 2021-04-06 | 上海天汉环境资源有限公司 | Emulsion wastewater treatment method and system |
| CN113788584A (en) * | 2021-09-24 | 2021-12-14 | 惠州市吉邦精密技术有限公司 | Machining wastewater treatment method and industrial wastewater purification method |
| CN114477527A (en) * | 2022-01-14 | 2022-05-13 | 广东闻扬环境科技有限公司 | Workshop cleaning wastewater treatment method and system |
| CN116395920B (en) * | 2023-06-09 | 2023-09-05 | 成都硕特科技股份有限公司 | Oil removal device and oil removal method for coal chemical wastewater |
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| KR20050032168A (en) * | 2003-10-01 | 2005-04-07 | 효성에바라환경엔지니어링 주식회사 | Portable water treatment system uv sterilizer and activated carbon fiber filter |
| CN100428981C (en) * | 2006-10-26 | 2008-10-29 | 江西理工大学 | Treatment of waste emulsion |
| CN101746909B (en) * | 2009-12-24 | 2011-03-02 | 吴少杰 | Method for pretreating machining waste emulsion liquid and equipment therefor |
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