CN103820199A - Waste cutting liquid treatment method - Google Patents
Waste cutting liquid treatment method Download PDFInfo
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- CN103820199A CN103820199A CN201310251067.8A CN201310251067A CN103820199A CN 103820199 A CN103820199 A CN 103820199A CN 201310251067 A CN201310251067 A CN 201310251067A CN 103820199 A CN103820199 A CN 103820199A
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Abstract
The invention discloses a waste cutting liquid treatment method which comprises the following steps: generally separating mineral oil from water in a waste liquid to be treated by using a low-temperature multi-effect evaporation method, performing later treatment on condensed water in the step a so as to achieve the emission standard, wherein the later treatment mainly comprises steps of air-floating, microelectrolysis, Fenton oxidation, catalytic oxidation and activated carbon adsorption. By the adoption of the method, different waste liquids can be treated by using one same method and one same process, the process, the method and medicines are not changed with the change of the waste liquids, and further no equipment needs to be changed or increased, so that the investment cost and the operation cost are greatly lowered, no secondary pollution is caused, and the benefits are greatly increased because of the separated and recycled mineral oil.
Description
Technical field
The present invention relates to a kind of method for treating waste liquid, relate in particular to the treatment process that contains mineral oil waste water and machine cutting waste fluid.
Background technology
In machining process, use containing water, the cutting fluid of mineral oil and can improve smear metal, work and cut the andfrictional conditions between tool, reduce cutting force and cutting temperature, tool life, and can reduce working deformation etc., thus improve working accuracy and reduce machined surface roughness.Cutting fluid can be divided into three major types: the aqueous solution, emulsion, machining oil.And the mixture that common waste liquid is this three major types, its waste liquid 20% left and right is the various additives of mineral oil and trace, the 80%th, and water.
Above-mentioned waste liquid belongs to the waste liquid of high pollution, is conventionally transported to the hazardous substance processing enter processing of national regulation by each source mill.Because the waste liquid composition of each source mill is not identical, and same source mill different time to deliver to the component of effluent of processing enter sometimes not identical yet, brought very large inconvenience to final harmless treatment.Mainly materialization processing and burning disposal in the treatment process of hazardous substance processing enter at present.Single waste liquid establishment treatment process of planting that materialization processing will be sent here according to each producer, select corresponding medicament, process qualified discharge again, but because processing enter is not to process for a certain batch of waste liquid of a certain producer separately, but all producers of specific aim carry out harmless treatment, a large amount of mineral oil in waste liquid can not be recycled large financial loss and an environmental pollution especially simultaneously, so this method can not be used substantially, method used is substantially all burning method at present, be exactly by waste liquid spirt liquid waste incinerator, because in the middle of waste liquid, 80% to be all so that water calorific value is very low cannot burn, so carry out spray combustion with a large amount of electric energy and calorific value very fuel (diesel oil), consume a large amount of energy (treatment cost of waste liquor per ton is roughly equal to 900 yuan of Renminbi), belong to energy processes, incinerator price is also quite high, maintenance cost is high especially.Owing to can producing secondary pollution after the complicated burning of component of effluent, the mineral oil in waste liquid can not be recycled.
Summary of the invention
The present invention provides a kind of cutting waste fluid treatment process in order to solve deficiency of the prior art, solves the processing problem of the cutting waste fluid of different types of, heterogeneity by unified technique and technology, by mineral oil wherein and water separately.
For achieving the above object, the technical solution used in the present invention is:
A kind of cutting waste fluid treatment process, it comprises the following steps:
A) pending cutting waste fluid is adopted low-temperature multi-effect method of evaporating make mineral oil in waste liquid and water base separately, described low-temperature multi-effect method of evaporating is: utilize the evaporation of vacuum pump negative pressure low-temperature multi-effect, evaporation control air pressure is 0.5-0.9atm for the first time, temperature is 80-130 ℃, evaporate separation, the water being evaporated is carried out to condensation recovery, while evaporating 50-60% moisture, control air pressure is that 0.5-0.9atm, temperature are 70-90 ℃ and carry out low-temperature evaporation for the second time, by mineral oil and water separately;
B) water of condensation in step a is carried out to subsequent disposal, reach emission standard, described subsequent disposal mainly comprises air supporting, micro-electrolysis, Fenton oxidation, catalyzed oxidation, charcoal absorption.
As a kind of preferred version of cutting waste fluid of the present invention, in described step b, the order of subsequent disposal is air supporting, micro-electrolysis, Fenton oxidation, catalyzed oxidation, charcoal absorption.
As a kind of preferred version of cutting waste fluid of the present invention, in described step b, the order of subsequent disposal is charcoal absorption, micro-electrolysis, Fenton oxidation, catalyzed oxidation.
As a kind of preferred version of cutting waste fluid of the present invention, in described step b, the order of subsequent disposal is micro-electrolysis, Fenton oxidation, catalyzed oxidation, charcoal absorption.
In step b of the present invention, air supporting is dosing coagulant in water of condensation, stirs and aeration 10-20 minute, adds flocculation agent carry out flocculation sediment and filter.Selected coagulating agent is polymerize aluminum chloride (PAC) preferably, and preferred flocculation agent is polyacrylamide (PAM).
In step b of the present invention, micro-electrolysis concrete operations are that enriching sulphur acetic acid regulates hydrogen ionexponent (pH) to 2-3 in water of condensation, are placed in the container of iron carbon filler bottom aeration 30-90 minute.
In step b of the present invention, the concrete operations of Fenton oxidation for to add appropriate 30% superoxol in water of condensation, and aeration 20-70 minute, adds sheet alkali to regulate pH to 9, adds appropriate PAM, water outlet after flocculation sediment.
In step b of the present invention the concrete operations of catalyzed oxidation be in water of condensation according to 0.1-1 ‰ volume ratio 30% superoxol, after stirring, add catalyzer, bottom aeration 90-150 minute, catalyzer used is conventional water purification catalyzer.
In step b of the present invention, the concrete operations of charcoal absorption for to adsorb with gac under electric stirring, and preferred gac is active fruit shell carbon.
Beneficial effect:
Cutting waste fluid treatment process of the present invention, utilize the multiple evaporation of negative pressure of vacuum, the mineral oil of different waste liquids is separated, and have the small organic molecule of azeotropic point with moisture transpiration cooling with water, cooling fluid is processed, greatly reduce intractability, different waste liquids can be processed by the same technique of Same Way, can be because of the change of waste liquid degree of changing technique, method and medicament, more do not need to change or increase equipment, greatly reduce input cost, running cost, non-secondary pollution, the mineral oil of Separation and Recovery also increases benefit greatly, turn waste into wealth, can nationally promote the use of this method and technique.
Embodiment
Embodiment 1
A kind of cutting waste fluid treatment process, comprises the following steps:
A) pending cutting waste fluid is adopted low-temperature multi-effect method of evaporating make mineral oil in waste liquid and water base separately, described low-temperature multi-effect method of evaporating is: utilize vacuum pump negative pressure low-temperature evaporation, evaporation control air pressure is 0.5-0.9atm for the first time, temperature is 80-130 ℃, evaporate separation, the water being evaporated is carried out to condensation recovery, while evaporating 50-60% moisture, control air pressure is that 0.5-0.9atm, temperature are 70-90 ℃ and carry out low-temperature evaporation for the second time, by mineral oil and water separately;
B) water of condensation in step a is added to PAC according to 0.5-5 ‰ massfraction, stirring aeration 15 minutes, add appropriate PAM to precipitate, water after precipitation carries out micro-electrolysis, having in the container of iron carbon filler, enriching sulphur acetic acid regulates hydrogen ionexponent (pH) 2-3, bottom aeration 60 minutes; Then the water in last process is added to 30% superoxol according to 0.1-1 ‰ volume ratio, aeration 60 minutes, adds sheet alkali to regulate pH to 9, adds appropriate PAM, water outlet after flocculation sediment; Water in last process is added to 30% superoxol according to 0.1-1 ‰ volume ratio, after stirring, add catalyzer, bottom aeration 120 minutes; Water in last process is adsorbed 30 minutes with active fruit shell carbon under electric stirring.
The mineral oil of separating in step a can recycling, has reached the standard of discharge through step b water of condensation after treatment, has avoided secondary pollution.
Embodiment 2
A kind of cutting waste fluid treatment process, comprises the following steps:
A) pending cutting waste fluid is adopted low-temperature multi-effect method of evaporating make mineral oil in waste liquid and water base separately, described low-temperature multi-effect method of evaporating is: utilize vacuum pump negative pressure low-temperature evaporation, evaporation control air pressure is 0.5-0.7atm for the first time, temperature is 80-130 ℃, evaporate separation, the water being evaporated is carried out to condensation recovery, while evaporating 50-60% moisture, control air pressure is that 0.5-0.7atm, temperature are 70-90 ℃ and carry out low-temperature evaporation for the second time, by mineral oil and water separately;
B) water of condensation in step a is adsorbed 30 minutes with active fruit shell carbon under electric stirring; Water after filtration is having in the container of iron carbon filler, and enriching sulphur acetic acid regulates hydrogen ionexponent (pH) 2-3, bottom aeration 60 minutes; Then the water in last process is added to 30% superoxol according to 0.1-1 ‰ volume ratio, after stirring, add catalyzer, bottom aeration 120 minutes; Add PAC according to 0.5-5 ‰ massfraction, stirring aeration 15 minutes, add appropriate PAM to precipitate; Water in last process is added to 30% superoxol according to 0.1-1 ‰ volume ratio, after stirring, add catalyzer, bottom aeration 120 minutes.
The mineral oil of separating in step a can recycling, has reached the standard of discharge through step b water of condensation after treatment, has avoided secondary pollution.
Embodiment 3
A kind of cutting waste fluid treatment process, comprises the following steps:
A) pending cutting waste fluid is adopted low-temperature multi-effect method of evaporating make mineral oil in waste liquid and water base separately, described low-temperature multi-effect method of evaporating is: utilize vacuum pump negative pressure low-temperature evaporation, evaporation control air pressure is 0.6-0.8atm for the first time, temperature is 80-130 ℃, evaporate separation, the water being evaporated is carried out to condensation recovery, while evaporating 50-60% moisture, control air pressure is that 0.6-0.8atm, temperature are 70-90 ℃ and carry out for the second time low-temperature multi-effect evaporation, by mineral oil and water separately;
B) by the water of condensation in step a having in the container of iron carbon filler, enriching sulphur acetic acid regulates hydrogen ionexponent (pH) 2-3, bottom aeration 60 minutes; Then the water in last process is added to 30% superoxol according to 0.1-1 ‰ volume ratio, aeration 60 minutes, adds sheet alkali to regulate pH to 9, adds appropriate PAM, water outlet after flocculation sediment; Add PAC according to 0.5-5 ‰ massfraction, stirring aeration 15 minutes, add appropriate PAM to precipitate; Water in last process is added to 30% superoxol according to 0.1-1 ‰ volume ratio, after stirring, add catalyzer, bottom aeration 120 minutes; Water in last process is adsorbed 30 minutes with active fruit shell carbon under electric stirring.
The mineral oil of separating in step a can recycling, has reached the standard of discharge through step b water of condensation after treatment, has avoided secondary pollution.
Although embodiments of the present invention are illustrated in specification sheets, these embodiments just, as prompting, should not limit protection scope of the present invention.Carrying out without departing from the spirit and scope of the present invention various omissions, displacement and change all should be included in protection scope of the present invention.
Claims (4)
1. a cutting waste fluid treatment process, it comprises the following steps:
A) pending cutting waste fluid is adopted low-temperature multi-effect method of evaporating make mineral oil in waste liquid and water base separately, described low-temperature multi-effect method of evaporating is: utilize the evaporation of vacuum pump negative pressure low-temperature multi-effect, evaporation control air pressure is 0.5-0.9atm for the first time, temperature is 80-130 ℃, evaporate separation, the water being evaporated is carried out to condensation recovery, while evaporating 50-60% moisture, control air pressure is that 0.5-0.9atm, temperature are 70-90 ℃ and carry out low-temperature evaporation for the second time, by mineral oil and water separately;
B) water of condensation in step a is carried out to subsequent disposal, reach emission standard, described subsequent disposal mainly comprises air supporting, micro-electrolysis, Fenton oxidation, catalyzed oxidation, charcoal absorption.
2. cutting waste fluid treatment process according to claim 1, is characterized in that: in described step b, the order of subsequent disposal is air supporting, micro-electrolysis, Fenton oxidation, catalyzed oxidation, charcoal absorption.
3. cutting waste fluid treatment process according to claim 1, is characterized in that: in described step b, the order of subsequent disposal is charcoal absorption, micro-electrolysis, Fenton oxidation, air supporting, catalyzed oxidation.
4. cutting waste fluid treatment process according to claim 1, is characterized in that: in described step b, the order of subsequent disposal is micro-electrolysis, Fenton oxidation, air supporting, catalyzed oxidation, charcoal absorption.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104107558A (en) * | 2014-07-15 | 2014-10-22 | 佳明新材料科技有限公司 | Multiple-effect cutting fluid evaporation equipment |
| CN104556515A (en) * | 2013-10-17 | 2015-04-29 | 黄士舟 | Treatment method for cutting waste liquid |
| CN105016538A (en) * | 2015-07-09 | 2015-11-04 | 杭州大地海洋环保有限公司 | Treatment method for water-based cutting wastewater |
| CN105152421A (en) * | 2015-09-11 | 2015-12-16 | 东莞市绿巨人环境科技有限公司 | Treatment method of distillation extraction waste liquid in fine chemical engineering production |
| CN105541028A (en) * | 2016-01-11 | 2016-05-04 | 姜贵清 | Treatment process for plant cutting fluid wastewater |
| CN107162301A (en) * | 2017-06-01 | 2017-09-15 | 冯合生 | Cutting fluid recovery and processing system and processing method |
| CN107188355A (en) * | 2017-06-02 | 2017-09-22 | 苏州市甘泉自动化环保设备厂 | Waste emulsion liquid catalytic pyrolysis matchmaker's processing method |
| CN107555690A (en) * | 2017-10-20 | 2018-01-09 | 徐翔 | Water-based metal cutting fluid environmental protection treatment unit and technique |
| CN109867395A (en) * | 2019-03-13 | 2019-06-11 | 宁波协恒环保科技有限公司 | A kind of cutting fluid integrated treatment unit and processing method |
| CN110902886A (en) * | 2019-12-06 | 2020-03-24 | 扬州海吉科技有限公司 | Method for directly curing cutting waste liquid |
| CN113292210A (en) * | 2021-07-27 | 2021-08-24 | 清大国华环境集团股份有限公司 | Ultramicro filter membrane manufacturing wastewater treatment process |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104556515A (en) * | 2013-10-17 | 2015-04-29 | 黄士舟 | Treatment method for cutting waste liquid |
| CN104107558A (en) * | 2014-07-15 | 2014-10-22 | 佳明新材料科技有限公司 | Multiple-effect cutting fluid evaporation equipment |
| CN105016538A (en) * | 2015-07-09 | 2015-11-04 | 杭州大地海洋环保有限公司 | Treatment method for water-based cutting wastewater |
| CN105152421A (en) * | 2015-09-11 | 2015-12-16 | 东莞市绿巨人环境科技有限公司 | Treatment method of distillation extraction waste liquid in fine chemical engineering production |
| CN105541028A (en) * | 2016-01-11 | 2016-05-04 | 姜贵清 | Treatment process for plant cutting fluid wastewater |
| CN107162301A (en) * | 2017-06-01 | 2017-09-15 | 冯合生 | Cutting fluid recovery and processing system and processing method |
| CN107188355A (en) * | 2017-06-02 | 2017-09-22 | 苏州市甘泉自动化环保设备厂 | Waste emulsion liquid catalytic pyrolysis matchmaker's processing method |
| CN107555690A (en) * | 2017-10-20 | 2018-01-09 | 徐翔 | Water-based metal cutting fluid environmental protection treatment unit and technique |
| CN109867395A (en) * | 2019-03-13 | 2019-06-11 | 宁波协恒环保科技有限公司 | A kind of cutting fluid integrated treatment unit and processing method |
| CN110902886A (en) * | 2019-12-06 | 2020-03-24 | 扬州海吉科技有限公司 | Method for directly curing cutting waste liquid |
| CN113292210A (en) * | 2021-07-27 | 2021-08-24 | 清大国华环境集团股份有限公司 | Ultramicro filter membrane manufacturing wastewater treatment process |
| CN113292210B (en) * | 2021-07-27 | 2021-11-26 | 清大国华环境集团股份有限公司 | Ultramicro filter membrane manufacturing wastewater treatment process |
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