CN105000708A - Waste emulsion quantitative reduction processing technology and apparatus - Google Patents
Waste emulsion quantitative reduction processing technology and apparatus Download PDFInfo
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- CN105000708A CN105000708A CN201510378693.2A CN201510378693A CN105000708A CN 105000708 A CN105000708 A CN 105000708A CN 201510378693 A CN201510378693 A CN 201510378693A CN 105000708 A CN105000708 A CN 105000708A
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Abstract
The invention relates to a waste emulsion quantitative reduction processing technology and apparatus, and is suitable for processing waste emulsion produced in the fields of elevator industry, automobile manufacturing industry, high precision and high-end equipment manufacturing industry, etc. The processing technology comprises the following steps: adding the waste emulsion into a quantitative reduction apparatus, adding acids for demulsification, controlling the amount of the acids according to an abrupt change point of pH change values, skimming upper level floating oil by an oil skimmer, and discharging the lower waste liquid after neutralizing. After processing, the COD removal rate reaches to 85% or higher, and the oil substance removal rate reaches to 92%-98%, and the volume reduction amount of the waste emulsion is higher than 85%. The overall technology can be in automatic control conveniently, is used for realizing quantitative reduction processing, and thetechnology and apparatus have high processing efficiency andareeconomically feasible.
Description
Technical field
The invention belongs to high density, field of refractory wastewater treatment, particularly relate to deweighting treating technology and the device of waste emulsified mixture.
Background technology
The lathe that mechanical processing industry uses in process of production general all with emulsion carry out cooling, lubricate, clean, antirust, the work-ing life of lathe can be extended.
Waste emulsified mixture produces and disposes becomes the important factor affecting mechanical processing industry, according to the regulation in HW07 and HW08 in National Hazard refuse register, emulsion belongs to danger wastes, need to process according to the management rules of danger wastes, this produces the treatment and disposal expense of unit by greatly increasing emulsion.
In Shanghai, District of Shanghai has the granted emulsion processing power of the enterprise of emulsion process qualification only to account for 1/5 of District of Shanghai emulsion generation, thus causes the subsequent environments problem being difficult to estimate.In addition, the procurement price of Shanghai City waste emulsified mixture, up to more than 4000 yuan/ton, considerably increase the burden that emulsion produces business, and the process of emulsion is disposed still in ceaselessly price raising process.
Emulsion produces rich and influential family and often comprises elevator industry, such as Mitsubishi's elevator, fastly reaches elevator, Thyssen Krupp elevator etc., and within its year, emulsion generation is often more than 200 tons; Automobile processing industry, such as Jiangxi Ge Te clarke gearing, Shanghai Volkswagen's automobile gearbox etc.; In addition, the equipment manufacture of high-precision end also needs a large amount of oil in water emulsions, thus produces a large amount of emulsions.
The very high concentrations of waste emulsified mixture, oleaginousness is often at more than 50000mg/L, and emulsion CODcr (chemical oxygen demand (COD)) is often up to 100000mg/L, and even up to 300000mg/L, pH value is often alkalescence.The waste water of high density like this will cause great impact to natural water, follow-up waste water station process.At present, emulsion main processing ways is breakdown of emulsion process.
At present, the main method of breakdown of emulsion comprise Production Wastewater By Combined Acidification And Demulsification, breakdown of emulsion of saltouing, coagulating agent breakdown of emulsion and film process breakdown of emulsion.Wherein, breakdown of emulsion of saltouing, mainly through adding sodium-chlor, sodium sulfate class resolvability salinity, strengthens the osmotic pressure of water body, thus forces solvability oil in water emulsion to change into non-solubility oily substance, thus separate with aqueous phase.Such as, Chinese invention patent 201410225947 discloses a kind for the treatment of unit and treatment process of waste emulsified mixture, treatment process mainly comprises storage tank, breakdown of emulsion case, dissolved salt case, oil-contg in waste water is reduced to below 10mg/L by its mode mainly through salt breakdown of emulsion, select traditional salt breakdown of emulsion mode, process.But need in salting-out process to add excessive salinity, simultaneously during concentration of emulsion used change fluctuation, the inorganic salt added need change, and this dosage needs ceaselessly to change, and are therefore difficult in actual procedure control.
Coagulating agent breakdown of emulsion adds polymerize aluminum chloride, bodied ferric sulfate and Calcium Chloride Powder Anhydrous etc., the compression double electric layer formed by dosing coagulant, adsorption bridging, the de-multiple action such as steady form the oily substance of non-emulsified state, thus the final organic concentration reduced in waste water, its final treatment process is still difficult to realize automatic control, and particularly waste strength has the period of wide cut adjustment.Such as, Chinese invention patent 201410351598 discloses a kind of acid-washing stainless steel line emulsion treatment system and treatment process, sets gradually oil trap, the first reactive tank, air flotation pool, the second reactive tank, the second settling tank, intermediate pool, mechanical filter and activated charcoal filter.Said system by adding the coagulating agent of different concns, flocculation agent processes, is difficult to steady running and controls, and the corrosion protection design of air flotation pool system needs special consideration.For another example, Chinese invention patent CN201410225485 discloses a kind for the treatment of process of waste emulsified mixture, the water treatment agent added comprises emulsion splitter, flocculation agent, coagulant aids, employing air-flotation system is separated, Collection utilization after waste liquor PH is adjusted to 6 ~ 9, this patent does not relate to how realizing efficient breakdown of emulsion process.
Film process breakdown of emulsion is the ultra filtration performance by means of polymeric membrane, and the material of different molecular weight in waste liquid is separated under pressure.Such as, Chinese invention patent CN201410380948 discloses a kind of emulsion waste water treatment process and device, treating processes comprises: waste water pumps into equalizing tank by oil trap, after floating oil collecting to oil tank, oil in water emulsion is by rotary drum grid, strike off the small impurities particle of injury ultra-filtration membrane, remove the iron content small-particle produced in the emulsion course of processing simultaneously, then enter ultra-filtration equipment and carry out being separated thus realize breakdown of emulsion process; For another example, Chinese invention patent CN201410140660 discloses a kind of emulsifying liquid waste water treatment system, described technique comprises equalizing tank---accident pool---breaking device---paper tape filtering device---purpose ceramic-film filter---ozone decomposed pond---acidication---aeration tank---settling tank---quartz filter---outlet sump, thus the systematicness process reaching emulsion.But, ultra-filtration membrane is to the centrifugation of emulsion, because ultra-filtration membrane is subject to the absorption of viscosity oily substance, thus cause film surface dirty stifled, especially for the emulsion of high density or ultrahigh concentration, after causing fouling membrane after often running 1 ~ 3 month, system cannot normally be run, and the breaking device simultaneously how realizing Automated condtrol is the key that emulsion efficiently processes.
The penetrating power that naphtenic acid utilizes hydrogen ion extremely strong carries out the non-emulsified process of emulsion.Such as Chinese invention patent CN201410225131 discloses a kind of emulsion treatment system, breakdown of emulsion reaction is realized by adjust ph, in fast mixed pond, sodium hydroxide is added after oil removal process, regulate after pH to neutrality and enter aftertreatment systems, but the flowability problem of emulsion when this patent not yet considers that winter temperature is lower.But, existing naphtenic acid process emulsifying liquid waste water technique remains and is being difficult to the emulsifying liquid waste water of handling properties and wide variety neatly thus is reaching good demulsification, and reduction (namely skim largely and go rancid and few water entrainment) is not obvious.
In sum, current emulsifying liquid waste water process exists that processing cost is high, minimizing is not obvious, be difficult to the problems such as automatic operating, is badly in need of proposing a kind of economy, the decrement process of the waste emulsified mixture that feasible, processing efficiency is high and device.
Summary of the invention
The object of the present invention is to provide the multiple emulsifying liquid waste water of a kind of energy sweetly disposition, facilitate Automated condtrol, processing cost is low, the deweighting treating technology of the waste emulsified mixture that the processing efficiency of COD and oily substance is high, be applicable to process inlet COD concentration and be not less than 50000mg/L, oil-contg is not less than the waste emulsified mixture of 20000mg/L.
Another object of the present invention is to the device that a kind of deweighting treating technology is provided.
Goal of the invention of the present invention is by as above technical scheme realization:
Described deweighting treating technology comprises following step:
1) emulsion pump is squeezed into minimizing apparatus container, described minimizing apparatus container is provided with heating unit and heats emulsion;
2) acid pump being squeezed into minimizing apparatus container, carrying out breakdown of emulsion reaction by stirring mix with emulsion, when suddenling change appears in the pH value of waste emulsified mixture in acid adding process, stopping acid adding.Acid add concentration in the early stage pH change slower, because a large amount of hydrogen ions take part in the reaction of breakdown of emulsion, later stage occurs that the pH flex point accelerated in reduction process is exactly the pH value needed for breakdown of emulsion, according to the difference of emulsion kind and concentration, pH value catastrophe point is also different, control sour consumption by flex point and process multiple waste emulsified mixture waste water more neatly on the one hand, ensure that best oily substance removal efficiency, and save sour consumption to greatest extent, on the other hand compared with salt breakdown of emulsion and the more convenient Automated condtrol of flocculation agent demulsification technology.
3) use steel band oil skimming machine that oil slick is scraped minimizing container, isolated oil slick is directly scraped in oil storage vessel, solves the susceptible to plugging problem of oil exit pipe of Conventional gravity oil skimming, be convenient to Automated condtrol, and oil skimming is effective;
4) add alkali be adjusted to neutrality by skimming the lower floor's waste water after oil slick, discharge minimizing apparatus container and carry out subsequent disposal.
Preferably, above-mentioned steps 1)-4) in, the temperature of waste emulsified mixture in minimizing apparatus container controls, more than 15 DEG C, can ensure the mobility of oily substance, reaches the object fully striking off oil slick.
Preferably, described step 2) in the acid that uses be the vitriol oil, mainly consider that hydrochloric acid mist is on the impact of operator, vitriol oil throwing device needs to adopt shield, comprises shield cap and protection cage, ensures the safety adding medicament process.
Preferably, described step 3) the middle oil skimming machine that uses scrapes size and the quantity that the oil slick time used depends on steel band oil skimming machine, is 8 ~ 16h.
Preferably, described step 3) in, while oil skimming machine scrapes oil slick, adopt intermittent cycle stir mode, prevent oil slick from causing frizing uneven because of viscosity, avoid oily substance dead angle accumulation in the reactor.
Further, circulation primary churning time is 5min, and time of repose is 55min.
Preferably, in step 3) and step 4) between increase by a step fenton oxidation step, hydrogen peroxide, ferrous sulfate are added the lower floor's waste water skimming oil reservoir, oxidizing reaction is carried out while stirring, then add alkali and be adjusted to neutral discharge minimizing apparatus container, the COD value of further reduction water outlet and oily substance concentration, thus meet city and receive tube drainage requirement.
Preferably, reinforced, temperature control in above-mentioned steps, stirring, pH detect, skim oil slick and discharge is all integrated in electric control system, by PLC (Programmable logic Controller, programmable logic controller) programming realization Automated condtrol.
The invention still further relates to a kind of device realizing above-mentioned waste emulsified mixture deweighting treating technology, comprise minimizing apparatus container, waste emulsion feeding unit, sour feeding device, alkali feeding device, temperature regulating device, pH proofing unit, skimming plant, waste liquid drawing mechanism, in described container, be provided with whipping appts; Described waste emulsion feeding unit is connected with container, comprises lift pump and magnetic flow meter; Described sour feeding device is connected with container, comprises sour storage tank, volume pump and pipeline; Described alkali feeding device is connected with container, comprises alkali storage tank, volume pump and pipeline; Waste emulsion temperature in described temperature regulating device detection receptacle, comprises one deck heating jacket outside container and temperature-detecting device; Described pH proofing unit detects waste emulsion pH value; Described skimming plant is used for skim, collects upper strata oil slick, comprises oil skimming machine and oil storage vessel; Described waste liquid drawing mechanism is the discharge pipe being positioned at container bottom.
Further, the device of described waste emulsified mixture deweighting treating technology also comprises automatic control device, described automatic control device is a PLC programming electrical control cabinet, and described electrical control cabinet is connected with each volume pump, temperature regulating device, pH proofing unit, skimming plant, realizes Automated condtrol.
Further, oil skimming machine in the device of described waste emulsified mixture deweighting treating technology adopts the steel band oil skimming machine of austenitic stainless steel form, MINly carries aqueous phase secretly.
Further, the size of described oil skimming machine and number select efficiency requirements and batch requirement of depending on process, general 1m
3the treatment capacity of/24 hours needs the steel band oil skimming machine of a 50mm, and other scales can according to above-mentioned requirements amplification design.
The invention has the beneficial effects as follows: the dosage 1, being determined acid by the flex point in pH value change curve, on the one hand the multiple emulsifying liquid waste water of sweetly disposition, ensure that best demulsification, be more convenient to Automated condtrol on the other hand; 2, control waste emulsified mixture temperature in minimizing apparatus container, more than 15 DEG C, the mobility of oily substance can be ensured, reach the object fully striking off oil slick; 3, use the oil skimming of steel band oil skimming machine to solve oily substance on the one hand and cause the susceptible to plugging problem of traditional oil exit pipe because of viscous aggregate in oil exit pipe top, be convenient to Automated condtrol, and better must strike off oil slick, reduction is obvious; 4, described minimizing treatment process is easy, reduces processing cost.
Accompanying drawing explanation
Fig. 1: the device schematic diagram of the deweighting treating technology of a kind of waste emulsified mixture of the present invention;
Wherein, 1-sodium hydroxide medicine system; 2-hydrogen peroxide dosing system; 3-ferrous sulfate dosing system; 4-sulfuric acid medicine system; 5-waste emulsified mixture lift pump; 6-hydrogen peroxide volume pump; 7-sulfuric acid volume pump; 8-ferrous sulfate volume pump; 9-sodium hydroxide volume pump; 10-water inlet magnetic flow meter; The waste emulsified mixture minimizing apparatus container of 11-jacketed heating; 12-oil exit pipe; 13-stainless steel agitator; 14-pH, thermometer combined electrode; 15-austenite steel band oil skimming machine; 16-blowdown system; 17-oil storage vessel; 18-electrical control cabinet.
Embodiment
Further illustrate the present invention below in conjunction with accompanying drawing 1 how to implement.
Embodiment 1
Waste emulsified mixture enters waste emulsified mixture minimizing apparatus container 11 by waste emulsified mixture lift pump 5, the switch of lift pump 5 is by the time variable control arranged in liquid-level floater controller and electrical control cabinet 18, thus control the amount of waste emulsified mixture, waste emulsified mixture flooding quantity is measured by water inlet magnetic flow meter 10, open stainless steel whipping appts 12 simultaneously, in abundant whipping process, open sulfuric acid volume pump 7, utilize the acid of the bright sulfur in sulfuric acid medicine system 4 to change corner position at pH and add sulfuric acid, sulfuric acid volume pump 7 is according to the program in electrical control cabinet 18 and pH, temperature combined electrode 14 carries out programming, control the dosage of sulfuric acid.After sulfuric acid adds end, stainless steel agitator 13 is opened, characteristic according to emulsion arranges suitable whipping procedure in electrical control cabinet 18, standard whipping procedure is for stirring 5min, the intermittent cycle whipping procedure of static 55min, open austenite steel band oil skimming machine 15 and carry out oil skimming process, suspended state oil after process enters floating oil collecting groove 17 through oil exit pipe 12, after oil skimming completes, unlatching sodium hydroxide volume pump 9 adjusts pH to neutral after sodium hydroxide medicine system 1 dosing, is disposed to aftertreatment systems through blowdown system 16.If system needs the degree of depth to blow, clearance is promoted to more than 90%, respectively by ferrous sulfate dosing system 2 and hydrogen peroxide dosing system 3, ferrous sulfate volume pump 8 and hydrogen peroxide volume pump 6 is adopted to add the compound forming Fenton oxidation, adopt the Fenton combined oxidation process under acidic conditions, organic concentration in further reduction waste water, thus COD in waste water and oily substance concentration are reduced further, by to add in sodium hydroxide and after, thus ensure that water outlet can reach and receive pipe water quality requirement.
Compared with prior art, the present invention fully optimizes and considers processing efficiency and Automated condtrol factor in the Production Wastewater By Combined Acidification And Demulsification process automatic controlling factor that adds of acid and naphtenic acid reaction process.Meanwhile, the thermodynamics and kinetics factor of the present invention's abundant waste emulsified mixture reaction, decreases management and the running cost of owner, can either select to receive pipe qualified discharge, can to select again in dosing and rear with other waste water dual disposals, for client provides Mutiple Choice.
Embodiment 2
It is 1m3/d that certain Taiwan investment electrically processes its waste emulsified mixture output of company, and processing costs is 3800 yuan/m3.After adopting apparatus of the present invention, sulfuric acid dosage is between 0.8 ~ 1.5%, steel band oil skimming machine diameter is 25mm, after oil skimming, volume is reduced to less than 90% of original volume, steel band oil skimming machine working time is 12h, working cost at 100 yuan/m3, for owner saves working cost 3320 yuan/day, for owner provides great economic worth.Test result shows: inlet COD concentration 160000mg/L, oils concentration 100000mg/L, and effluent COD concentration is less than 20000mg/L, and oily substance clearance is higher than 98%.Water outlet adds ferrous sulfate 5000mg/L, and hydrogen peroxide 15000mg/L (utilize the Fenton oxidation system that ferrous ion, hydrogen peroxide are formed, farthest reduce the organism in waste water), after reaction 4h, water outlet COD is less than 1500mg/L.Meanwhile, after supernatant liquid 900L/d after treatment and other waste water combination treatment, water outlet COD is less than 100mg/L.
Embodiment 3
Certain German gearing company limited waste emulsified mixture generation is 3m3/d, and after adopting this device, it is 1.2% that sulfuric acid adds volume ratio, and steel band oil skimming machine working time is 16h, and waste emulsified mixture COD concentration is 100000mg/L, and after process, water outlet COD is less than 10000mg/L.Water outlet adds hydrogen peroxide 15000mg/L, ferrous sulfate 5000mg/L, and after process, COD concentration is less than 8500mg/L, and supernatant liquid is mixed aftertreatment with sanitary sewage, Cleaning Wastewater, and after process, COD is less than 60mg/L, reaches waste water recycling requirement.
Embodiment 4
Certain wheel box Manufacturing Co., Ltd produces the waste emulsified mixture of high density, COD concentration is up to 200000mg/L, after adopting the process of this device, effluent COD concentration is less than 20000mg/L, clearance is up to more than 90%, steel band oil skimming machine oil skimming volume is 9% (namely owner's emulsion decrement is 91%) of cumulative volume, it is 1.5% that sulfuric acid adds volume ratio, steel band oil skimming machine working time is 14h, steel band oil skimming machine quantity is 2, working cost is 220 yuan/m3, relative to the danger wastes disposal costs of 3500 yuan/m3, greatly reduce the waste emulsified mixture processing cost of owner.
Claims (10)
1. a waste emulsified mixture deweighting treating technology, is characterized in that, comprises following step:
1) emulsion pump is squeezed into minimizing apparatus container, described minimizing apparatus container is provided with heating unit and heats emulsion;
2) acid pump being squeezed into minimizing apparatus container, carrying out breakdown of emulsion reaction by stirring mix with emulsion, when suddenling change appears in the pH value of waste emulsified mixture in acid adding process, stopping acid adding;
3) use steel band oil skimming machine that oil slick is scraped minimizing container, isolated oil slick enters in oil storage vessel;
4) add alkali be adjusted to neutrality by skimming the lower floor's waste water after oil slick, discharge minimizing apparatus container and carry out subsequent disposal.
2. waste emulsified mixture deweighting treating technology according to claim 1, is characterized in that, the temperature of waste emulsified mixture in minimizing apparatus container controls more than 15 DEG C.
3. waste emulsified mixture deweighting treating technology according to claim 1, is characterized in that, described step 2) in use acid be the vitriol oil.
4. waste emulsified mixture deweighting treating technology according to claim 1, is characterized in that, described step 3) the middle oil skimming machine that uses scrapes size and the quantity that the oil slick time used depends on oil skimming machine, is 8-16h.
5. waste emulsified mixture deweighting treating technology according to claim 1, is characterized in that, described step 3) in use oil skimming machine to scrape oil slick while, adopt intermittent cycle stir mode.
6. waste emulsified mixture deweighting treating technology according to claim 5, is characterized in that, circulation primary churning time is 5min, and time of repose is 55min.
7. waste emulsified mixture deweighting treating technology according to claim 1, it is characterized in that, in step 3) and step 4) between increase by a step Fenton oxidation step, hydrogen peroxide, ferrous sulfate are added the lower floor's waste water skimming oil reservoir, while stirring, carry out oxidizing reaction.
8. waste emulsified mixture deweighting treating technology according to claim 1, is characterized in that,
Described step 1)-4) in reinforced, temperature control, stirring, pH detect, skim oil slick and discharge is all integrated in electric control system, by PLC programming realization Automated condtrol.
9. one kind realizes the device of waste emulsified mixture deweighting treating technology according to claim 1, it is characterized in that, comprise minimizing apparatus container, waste emulsion feeding unit, sour feeding device, alkali feeding device, temperature regulating device, pH proofing unit, skimming plant, waste liquid drawing mechanism, in described container, be provided with whipping appts; Described waste emulsion feeding unit is connected with container, comprises lift pump and magnetic flow meter; Described sour feeding device is connected with container, comprises sour storage tank, volume pump and pipeline; Described alkali feeding device is connected with container, comprises alkali storage tank, volume pump and pipeline; Waste emulsion temperature in described temperature regulating device detection receptacle, comprises one deck heating jacket outside container and temperature-detecting device; Described pH proofing unit detects waste emulsion pH value; Described skimming plant is used for skim, collects upper strata oil slick, comprises oil skimming machine and oil storage vessel; Described waste liquid drawing mechanism is the discharge pipe being positioned at container bottom.
10. the device of waste emulsified mixture deweighting treating technology according to claim 9, it is characterized in that, also comprise automatic control device, described automatic control device is a PLC programming electrical control cabinet, described electrical control cabinet is connected with each volume pump, temperature regulating device, pH proofing unit, skimming plant, whipping appts, realizes Automated condtrol.
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| CN106277573A (en) * | 2016-08-11 | 2017-01-04 | 上海洗霸科技股份有限公司 | Processing method containing aluminum emulsified waste liquid |
| CN107572685A (en) * | 2017-08-31 | 2018-01-12 | 新奥环保技术有限公司 | A kind of processing unit and method of high-concentration waste emulsion |
| CN107759007A (en) * | 2016-08-22 | 2018-03-06 | 上海爻铨环保机械工程有限公司 | The processing system and handling process of a kind of Cutting Liquid Wastewater |
| CN109534574A (en) * | 2018-12-21 | 2019-03-29 | 泽州县和美环保科技有限公司 | A kind of processing method of waste emulsified mixture |
| CN110204128A (en) * | 2019-07-09 | 2019-09-06 | 上海环境保护有限公司 | A kind of caprolactam sewerage advanced treatment process |
| CN110526482A (en) * | 2019-08-20 | 2019-12-03 | 佛山市富龙环保科技有限公司 | A kind of waste emulsified mixture disposing technique and its operating method |
| CN112520925A (en) * | 2020-11-13 | 2021-03-19 | 辽宁忠旺集团有限公司 | Aluminum alloy waste emulsion treatment process |
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| CN106277573A (en) * | 2016-08-11 | 2017-01-04 | 上海洗霸科技股份有限公司 | Processing method containing aluminum emulsified waste liquid |
| CN107759007A (en) * | 2016-08-22 | 2018-03-06 | 上海爻铨环保机械工程有限公司 | The processing system and handling process of a kind of Cutting Liquid Wastewater |
| CN107572685A (en) * | 2017-08-31 | 2018-01-12 | 新奥环保技术有限公司 | A kind of processing unit and method of high-concentration waste emulsion |
| CN107572685B (en) * | 2017-08-31 | 2024-03-19 | 新奥环保技术有限公司 | Treatment device and method for high-concentration waste emulsion |
| CN109534574A (en) * | 2018-12-21 | 2019-03-29 | 泽州县和美环保科技有限公司 | A kind of processing method of waste emulsified mixture |
| CN110204128A (en) * | 2019-07-09 | 2019-09-06 | 上海环境保护有限公司 | A kind of caprolactam sewerage advanced treatment process |
| CN110526482A (en) * | 2019-08-20 | 2019-12-03 | 佛山市富龙环保科技有限公司 | A kind of waste emulsified mixture disposing technique and its operating method |
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Application publication date: 20151028 |