CN112812880B - Machining tool cutting fluid recycling method and application thereof - Google Patents
Machining tool cutting fluid recycling method and application thereof Download PDFInfo
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- CN112812880B CN112812880B CN202110066652.5A CN202110066652A CN112812880B CN 112812880 B CN112812880 B CN 112812880B CN 202110066652 A CN202110066652 A CN 202110066652A CN 112812880 B CN112812880 B CN 112812880B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0016—Working-up used lubricants to recover useful products ; Cleaning with the use of chemical agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
- B23Q11/1069—Filtration systems specially adapted for cutting liquids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0058—Working-up used lubricants to recover useful products ; Cleaning by filtration and centrifugation processes; apparatus therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention discloses a method for recycling cutting fluid of a processing machine tool, which comprises the following steps: (1) cleaning a system; (2) cutting fluid recovery: (3) regeneration and purification of cutting fluid: (4) mixing by a mixer; and (5) reusing the processing machine tool. The method of adopting the poly (acrylonitrile-methyl acrylate) hydrolysis membrane filter, adding the degerming agent, adding the pH regulator and the mixer to mix the cutting fluid stock solution enables the cutting fluid waste liquid to obtain good regeneration and purification effects, and the regenerated and purified cutting fluid waste liquid can be effectively recycled.
Description
Technical Field
The invention relates to the field of machining, in particular to a method for recycling cutting fluid of a machining tool and application of the method.
Background
The thin-wall part has the remarkable characteristics of light weight, material saving, compact structure and the like, and is widely applied to various mechanical fields of aviation, automobiles, military industry and the like. The thin-wall part has the characteristics of poor rigidity, weak strength, easy deformation during processing and the like, and the deformation caused by shear vibration or uneven material is difficult to control during the processing process, so that the machining quality of the part is difficult to ensure.
In general, drilling is often required in machining of thin-walled parts, and cutting fluid cooling lubrication is generally used for cast iron drilling at present. The cutting fluid may be classified into a water-based cutting fluid and an oil-based cutting fluid. Because the water-based cutting fluid has the characteristics of difficult combustion, easy dilution and the like, the water-based cutting fluid is mostly adopted in the machining process to reduce the cutting force generated by cutting, grinding and the like in the mechanical production and manufacturing process and reduce the cutting temperature. With the prolonging of the service life of the cutting fluid, the quality of the water-based cutting fluid is deteriorated, the content of metal ions is increased, and the using effect is obviously reduced, so that the cutting fluid needs to be replaced regularly, the demand of the cutting fluid is increased, and the treatment capacity of the cutting waste fluid is increased.
The treatment process of the cutting waste liquid is generally divided into three steps: impurity removal, demulsification and deep purification. The main purpose of impurity removal is to remove impurities such as suspended particles in the waste liquid by centrifugation, and a gravity separation method, a centrifugation method, and the like are commonly used. The purpose of demulsification is to destroy the stability of the waste liquid, realize the separation of oil and water in the cutting waste liquid, select a proper demulsifier or demulsification method for treatment, greatly reduce the COD content in the waste liquid, but still far reach the national discharge standard, so the water purification of the demulsified waste water is needed, the organic matter is thoroughly degraded, and the waste water is discharged after reaching the standard, therefore, the treatment process of the cutting fluid is complex, and the treatment cost is high. The solid waste generated by the cutting fluid belongs to dangerous waste, the waste contains a large amount of useful metals, further treatment and resource utilization are needed, and the environmental pollution and resource waste are reduced.
Therefore, it is a significant work to develop a method for recycling cutting fluid, which can effectively recover, regenerate and purify, and recycle the cutting fluid during the machining process.
Disclosure of Invention
In order to solve the problems, the invention provides a method for recycling cutting fluid of a processing machine tool, which comprises the following steps: (1) cleaning a system; (2) cutting fluid recovery: (3) regeneration and purification of cutting fluid: (4) mixing in a mixer; and (5) reusing the processing machine tool.
In a preferable scheme, the cutting fluid recovery is to recover, store and transport the waste cutting fluid cleaned out of the processing machine tool by a cutting fluid recovery vehicle.
Preferably, the cutting fluid recovery vehicle is a fluid bath filtration transport vehicle with a double filter.
As a preferable scheme, the double filters are a stainless steel mesh basket filter and a cloth bag type filter; the filtering precision of the stainless steel basket filter is 0.5-2 mm; the filtration precision of the cloth bag type filter is 10-200 mu m.
As a preferable scheme, the step of regenerating and purifying the cutting fluid comprises the following steps: (1) chip removal: (2) deoiling: (3) degerming: and (4) adjusting the pH value.
As a preferable scheme, the chip removing is to remove metal chips in the cutting fluid waste liquid through a membrane filter; the oil removal step comprises the steps of firstly carrying out ozone aeration to enable miscellaneous oil in the cutting fluid to float upwards to form surface floating oil, and then removing the surface floating oil through a membrane filter
In a preferred embodiment, the filtration membrane in the membrane filter is at least one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane, a hollow fiber membrane, and a ceramic membrane.
As a preferred scheme, the filtering membrane is a microfiltration membrane; the membrane aperture of the micro-filtration membrane is 0.05-0.12 μm.
As a preferable scheme, the mixer is used for mixing cutting fluid stock solution into cutting fluid after regeneration and purification; the addition amount is 0.5-2 wt% of the cutting fluid after the regeneration and purification of the cutting fluid.
The invention also provides application of the machining tool cutting fluid recycling method in the field of thin-wall part machining cutting fluid recycling.
Has the advantages that:
1. according to the invention, through the filtering and oil-water separation functions of the filtering membrane in the membrane filter, metal cuttings, surface floating oil and dissolved miscellaneous oil in the cutting fluid waste liquid are effectively removed, and the efficiency and quality of regeneration and purification of the cutting fluid waste liquid are obviously improved.
2. According to the invention, the cutting fluid regenerated and purified by the cutting fluid is added with a very small amount (0.5-2 wt%) of cutting fluid stock solution through the mixer, so that the cutting fluid stock solution can be normally recycled, the utilization efficiency of the cutting fluid is greatly improved, the discharge of waste liquid is reduced, and the method is green, environment-friendly, economical and practical.
3. The cutting fluid treatment method in the application of the invention is different from other treatment methods in that: 1) The cutting fluid does not need to be subjected to waste liquid discharge treatment; 2) The single machine cutting fluid system of the factory can be integrally managed in a cutting fluid management mode according to the requirement; 3) The consumption of the cutting fluid is reduced, and the cutting fluid which is originally discharged as waste liquid is recycled, so that the consumption is reduced; 4) The method can meet the requirements of energy conservation and emission reduction of factories, and the consumption of the cutting fluid can be reduced by 30-40 percent in the method; the discharge amount of waste liquid is reduced by 80 to 90 percent.
Drawings
FIG. 1 is an overall process flow diagram of the present application;
FIG. 2 is a flow chart of the process for regeneration and purification of cutting fluid in the present application.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
As used herein, the term "consisting of 8230; preparation" is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of 8230comprises" excludes any non-specified elements, steps or components. If used in a claim, this phrase shall render the claim closed except for the materials described except for those materials normally associated therewith. When the phrase "consisting of 8230is present in a clause of the claim body, rather than immediately after the subject matter, it defines only the elements described in that clause; other elements are not excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein in the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes equivalent parts that are acceptable for use in a generic sense without departing from the spirit and scope of the invention. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise numerical value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.
In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the number clearly indicates the singular.
In order to solve the problems, the invention provides a method for recycling cutting fluid of a processing machine tool, which comprises the following steps: (1) cleaning a system; (2) cutting fluid recovery: (3) regeneration and purification of cutting fluid: (4) mixing by a mixer; and (5) reusing the processing machine tool.
In some preferred embodiments, the system cleaning is to clean a liquid tank, a pipeline and an inner wall of the machine tool by using a system cleaning agent, so as to clean waste cutting fluid and avoid secondary pollution of the residual waste cutting fluid on new fluid.
The system cleaner of the present invention may be a commercially available system cleaner product, such as the 4wt% concentration standard sold by Wuhan, russian, mayda lubricants, inc.
In some preferred embodiments, the cutting fluid recovery is to recover, store and transport waste cutting fluid cleaned out of the machine tool by a cutting fluid recovery vehicle.
In some preferred embodiments, the cutting fluid recovery vehicle is a flume filtration transport vehicle with a double filter.
In some preferred embodiments, the dual filter is a stainless steel mesh basket filter and a bag filter; the filtering precision of the stainless steel basket filter is 0.5-2 mm; the filtration precision of the cloth bag type filter is 10-200 mu m.
In some preferred embodiments, the step of regenerating and purifying the cutting fluid comprises the following steps: (1) scrap removal: (2) deoiling: (3) degerming: and (4) adjusting the pH value.
In some preferred embodiments, the chip removal is the removal of metal chips in the cutting fluid waste liquid by a membrane filter; the oil removal comprises the steps of firstly carrying out ozone aeration to enable the miscellaneous oil in the cutting fluid to float upwards to form surface floating oil, and then removing the surface floating oil through a membrane filter
In some preferred embodiments, the filtration membrane in the membrane filter is at least one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane, a hollow fiber membrane, and a ceramic membrane.
In some preferred embodiments, the filtration membrane is a microfiltration membrane; the membrane aperture of the micro-filtration membrane is 0.05-0.12 μm.
In some preferred embodiments, the membrane pore size of the microfiltration membrane is between 0.09 and 0.11 μm.
In some preferred embodiments, the microfiltration membrane is a polyacrylonitrile-based microfiltration membrane.
In some preferred embodiments, the polyacrylonitrile-based microfiltration membrane is a poly (acrylonitrile-methyl acrylate) hydrolysis membrane prepared by a thermally induced phase separation method.
In some preferred embodiments, the poly (acrylonitrile-methyl acrylate) hydrolysis membrane is self-made, comprising the steps of: (1) Mixing and heating poly (acrylonitrile-methyl acrylate), CPL (CAS number: 105-60-2) and GTA (CAS number: 102-76-1) to 160 ℃, violently stirring until a homogeneous solution is formed, pouring the solution into a film-pressing mold, compacting the mold to be solid at a plane uniform pressure of 300MPa, freezing and crystallizing at a low temperature of 0 ℃ for molding, removing the crystallized film from the mold at room temperature, putting the obtained film into a water bath for solvent removal for 10-18 hours, naturally standing the film without applying any external force during the process, and obtaining the poly (acrylonitrile-methyl acrylate) film prepared by a thermally induced phase separation method; (2) Preparing a sodium hydroxide solution, and soaking the poly (acrylonitrile-methyl acrylate) film in the sodium hydroxide solution for in-situ hydrolysis to obtain the poly (acrylonitrile-methyl acrylate) hydrolysis film.
In some preferred embodiments, the concentration of the sodium hydroxide solution is 3 to 15wt%; the time of in-situ hydrolysis is 1 to 5 hours.
In some preferred embodiments, the concentration of the sodium hydroxide solution is 5wt%; the in situ hydrolysis time was 3.5 hours.
In some preferred embodiments, the poly (acrylonitrile-methyl acrylate) is self-made, comprising the steps of: (1) Heating the water bath kettle to 60 ℃, measuring distilled water, adding the distilled water into a reaction vessel, and introducing N 2 Protection; (2) Weighing emulsifier OP-10 and SDS (CAS number: 151-21-3), adding into a reaction vessel, stirring, and reflux-cooling with a condenser; (3) Weighing predetermined amounts of acrylonitrile (CAS No. 107-13-1) and methyl acrylate (CAS No. 96-33-3) and mixing uniformly, adding dodecyl mercaptan (CAS No. 112-55-0) into a reaction vessel; (4) After reacting for 1-2 hours, adding an ammonium persulfate initiator, dropwise adding the mixed solution of acrylonitrile and methyl acrylate into a reaction container, controlling the dropwise adding speed to be 10-20 drops/second, and dropwise adding the reaction time to be 2-3 hours; (5) after the dropwise addition is finished, continuously reacting for 1-2 hours; (6) And after the reaction is finished, taking out the reaction liquid, adding a magnesium sulfate demulsifier for demulsification, and finally filtering and drying the demulsified product to obtain the final product poly (acrylonitrile-methyl acrylate).
In some preferred embodiments, the molar ratio of acrylonitrile to methyl acrylate is 5.5 to 9:1 to 3.5.
In some preferred embodiments, the molar ratio of acrylonitrile to methyl acrylate is 8.5:1.5.
in some preferred embodiments, the sterilization is to inactivate bacteria and fungi in the cutting fluid by adding a degerming agent.
The bactericide of the present invention may be a commercially available bactericide product having a concentration of 0.05% by weight as manufactured and sold by Wuhan Russian Lubricant Co.
In some preferred embodiments, the pH adjustment is a pH range adjustment of the cutting fluid waste liquid by adding a pH adjusting agent; the pH value of the cutting fluid waste liquid after pH adjustment is 8.5-9.0.
The pH adjusting agent of the present invention may be a commercially available pH adjusting agent product, for example, a standard 3wt% concentration product manufactured and sold by Wuhan Russian Lubricant Co.
In some preferred embodiments, the mixer is compounded by adding cutting fluid stock solution to cutting fluid after regeneration and purification; the addition amount is 0.5-2 wt% of the cutting fluid after the regeneration and purification of the cutting fluid.
The invention also provides application of the machining tool cutting fluid recycling method in the field of thin-wall part machining cutting fluid recycling.
Examples
The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to all of the examples. The starting materials of the present invention are all commercially available unless otherwise specified.
Example 1
Embodiment 1 provides a method for recycling cutting fluid of a processing machine tool, which comprises the following steps: and (1) system cleaning: cleaning a liquid tank, a pipeline and the inner wall of the machine tool by using a system cleaning agent to clean the cutting fluid waste liquid, and avoiding secondary pollution of the residual cutting fluid waste liquid to new liquid; (2) cutting fluid recovery: the cutting fluid recovery vehicle is used for recovering, storing and transporting the waste cutting fluid cleaned out by the processing machine tool, and the coarse filtration of the double filters is carried out in the vehicle during the process; (3) regeneration and purification of cutting fluid: the cutting fluid is subjected to chip removal, oil removal, sterilization and pH adjustment treatment by regeneration and purification equipment in a fixed sequence; (4) mixing in a mixer: adding the stock solution of the cutting fluid to the cutting fluid after regeneration and purification; (5) reusing the processing machine tool: and feeding the mixed cutting fluid regenerated liquid into a processing machine tool for reuse through a feeding pump.
The system cleaning agent in the embodiment is a system cleaning agent product with a concentration standard of 4wt% which is produced and sold by Wuhan, russian and Mayda lubricants, inc.
In the embodiment, the cutting fluid recovery vehicle is a fluid bath filtering conveying vehicle with double filters; the double filters are stainless steel mesh basket filters and cloth bag filters; the filtering precision of the stainless steel basket filter is 1mm; the filtration accuracy of the bag filter was 30 μm.
In the embodiment, the metal chips in the cutting fluid waste liquid are removed through a membrane filter; the oil removal is to remove surface floating oil and dissolved miscellaneous oil in the cutting fluid waste liquid through a membrane filter.
The filtration membrane in the membrane filter in this example was a poly (acrylonitrile-methyl acrylate) hydrolysis membrane having a membrane pore size of 0.1. Mu.m.
In the embodiment, the poly (acrylonitrile-methyl acrylate) hydrolysis membrane is self-made, and the steps comprise the following steps: (1) Mixing and heating 2g of poly (acrylonitrile-methyl acrylate) with 5g of CPL (CAS number: 105-60-2) and 5g of GTA (CAS number: 102-76-1) to 160 ℃, vigorously stirring until a homogeneous solution is formed, pouring the solution into a film pressing mold, compacting the mold to be solid at a plane uniform pressure of 300MPa, freezing and crystallizing at a low temperature of 0 ℃ for forming, removing the crystallized film from the mold at room temperature, putting the obtained film into a water bath for solvent removal for 16 hours, and naturally standing without applying any external force during the period to obtain the poly (acrylonitrile-methyl acrylate) film prepared by a thermally induced phase separation method; (2) Preparing 5wt% sodium hydroxide solution, and soaking the poly (acrylonitrile-methyl acrylate) film in the sodium hydroxide solution for in-situ hydrolysis for 3.5 hours to obtain the poly (acrylonitrile-methyl acrylate) hydrolysis film.
In this example, the poly (acrylonitrile-methyl acrylate) is prepared by a process comprising the steps of: (1) Heating a water bath to 60 ℃, measuring 2000mL of distilled water, adding the distilled water into a reaction vessel, and introducing N 2 Protection; (2) Weighing emulsifier 15g OP-10 and 11g SDS (CAS number: 151-21-3), adding into a reaction vessel, stirring, and reflux-cooling with a condenser tube; (3) 8.5mol of acrylonitrile (CAS number: 107-13-1) and 1.5mol of methyl acrylate (CAS number: 96-33-3) are weighed and mixed uniformly, and 20g of dodecyl mercaptan (CAS number: 112-55-0) is added into a reaction vessel; (4) After 1 hour of reactionAdding 1.1g of ammonium persulfate initiator, dropwise adding the mixed solution of acrylonitrile and methyl acrylate into a reaction container, controlling the dropwise adding speed to be 15 drops/second, and dropwise adding for 2.5 hours; (5) after the dropwise addition is finished, continuously reacting for 2 hours; (6) And after the reaction is finished, taking out the reaction liquid, adding 600g of anhydrous magnesium sulfate demulsifier for demulsification, and finally filtering and drying the demulsified product to obtain the final product poly (acrylonitrile-methyl acrylate).
In the embodiment, the sterilization is to inactivate bacteria and fungi in the cutting fluid by adding a degerming agent.
The bactericide in the embodiment is a bactericide product which is produced and sold by Wuhan, russian and Mayda lubricant Co.
In the embodiment, the pH adjustment is to adjust the pH range of the cutting fluid waste liquid by adding a pH regulator; the pH value of the cutting fluid waste liquid after pH adjustment is 8.8.
The pH regulator in this example is a 3wt% concentration standard pH regulator product manufactured and sold by Wuhan, russia and Luminalia lubricants, inc.
In the embodiment, the addition amount of the cutting fluid stock solution in the mixing process of the mixer is 1wt% of the cutting fluid after the regeneration and purification of the cutting fluid.
In this embodiment, the stock solution of the cutting fluid is a cutting fluid product sold by Wuhan Russian Mayda Lubricant Co.
Example 2
The embodiment of the present invention is different from embodiment 1 in that: 6mol of acrylonitrile and 3mol of methyl acrylate.
Example 3
The embodiment of the present invention is different from embodiment 1 in that: the concentration of the sodium hydroxide solution was 15wt%; the in situ hydrolysis time was 1.5 hours.
Comparative example 1
The embodiment of this comparative example is the same as example 1 except that: 5mol of acrylonitrile and 3.5mol of methyl acrylate.
Comparative example 2
The embodiment of this comparative example is the same as example 1 except that: 11mol of acrylonitrile and 2mol of methyl acrylate.
Comparative example 3
The embodiment of this comparative example is the same as example 1 except that: the concentration of the sodium hydroxide solution is 20wt%; the time for in situ hydrolysis was 3 hours.
Comparative example 4
The embodiment of this comparative example is the same as example 1 except that: the concentration of the sodium hydroxide solution is 1wt%; the time for in situ hydrolysis was 5 hours.
Comparative example 5
The embodiment of this comparative example is the same as example 1 except that: the amount of the stock cutting fluid added to the mixer was 0.1wt%.
Evaluation of Properties
Absorbance of cutting fluid: testing the absorbance of the cutting fluid mixed by the mixer in each example and each comparative example by a spectrophotometer; taking the copper-containing cutting fluid waste liquid as a required recycling treatment liquid, wherein the absorbance of the copper-containing cutting fluid waste liquid at 600nm is 0.786; each example comparative example tested 5 samples and the average of the values measured is reported in table 1.
The metal content of the filter residue: and (3) burning the filter residues filtered by the filter membranes in the membrane filters in the examples and the comparative examples to dry the filter residues, testing the amount of copper contained in the filter residues, testing 5 samples in each comparative example, and recording the average value of the measured values into table 1.
TABLE 1
Through the embodiments 1 to 3, the comparative examples 1 to 5 and the table 1, it can be known that the cutting fluid recycling method for the processing machine tool and the application thereof provided by the invention have good cutting fluid purification and regeneration effects, good removal effects of miscellaneous oil and metal chips, can effectively recycle the cutting fluid, reduce the discharge of the cutting fluid, thereby reducing the problems of cost and environmental pollution, are suitable for being popularized in the field of machining, and have wide development prospects. Wherein example 1 achieved the best performance index with the best filtration membrane and filtration membrane preparation conditions, among other factors.
Finally, it should be understood that the above-described embodiments are merely preferred embodiments of the present invention, and not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A method for recycling cutting fluid of a processing machine tool is characterized by comprising the following steps: the method comprises the following steps: (1) cleaning a system; (2) cutting fluid recovery: (3) regeneration and purification of cutting fluid: (4) mixing by a mixer; and (5) reusing the processing machine tool.
The cutting fluid recovery is to recover, store and transport the cutting fluid waste liquid cleaned out by the processing machine tool through a cutting fluid recovery vehicle;
the cutting fluid recovery vehicle is a fluid bath filtering and conveying vehicle with double filters;
the double filters are a stainless steel mesh basket filter and a cloth bag type filter; the filtering precision of the stainless steel basket filter is 0.5-2 mm; the filtering precision of the cloth bag type filter is 10-200 mu m;
the step of regenerating and purifying the cutting fluid comprises the following steps: (1) chip removal: (2) deoiling: (3) degerming: (4) pH adjustment;
the chip removal is to remove metal chips in the cutting fluid waste liquid through a membrane filter; the oil removal step is that ozone aeration is firstly carried out to enable the miscellaneous oil in the cutting fluid to float upwards to form surface floating oil, and then the surface floating oil is removed through a membrane filter;
the filtering membrane in the membrane filter is a microfiltration membrane; the membrane aperture of the micro-filtration membrane is 0.09-0.11 μm;
the microfiltration membrane is a poly (acrylonitrile-methyl acrylate) hydrolytic membrane prepared by a thermally induced phase separation method;
the preparation method of the poly (acrylonitrile-methyl acrylate) hydrolysis membrane comprises the following steps: (1) Mixing and heating 2g of poly (acrylonitrile-methyl acrylate) with 5g of CPL (CAS number: 105-60-2) and 5g of GTA (CAS number: 102-76-1) to 160 ℃, vigorously stirring until a homogeneous solution is formed, pouring the solution into a film pressing mold, compacting the mold to be solid at a plane uniform pressure of 300MPa, freezing and crystallizing at a low temperature of 0 ℃ for forming, removing the crystallized film from the mold at room temperature, putting the obtained film into a water bath for solvent removal for 16 hours, and naturally standing without applying any external force during the period to obtain the poly (acrylonitrile-methyl acrylate) film prepared by a thermally induced phase separation method; (2) Preparing 5wt% sodium hydroxide solution, and soaking the poly (acrylonitrile-methyl acrylate) film in the sodium hydroxide solution for in-situ hydrolysis for 3.5 hours to obtain a poly (acrylonitrile-methyl acrylate) hydrolysis film;
the preparation method of the poly (acrylonitrile-methyl acrylate) comprises the following steps: (1) Heating a water bath to 60 ℃, measuring 2000mL of distilled water, adding the distilled water into a reaction container, and introducing N 2 Protection; (2) Weighing 15g of OP-10 and 11g of SDS as emulsifiers, adding the emulsifiers into a reaction vessel, uniformly stirring, and mounting a condensing tube for reflux; (3) Weighing 8.5mol of acrylonitrile and 1.5mol of methyl acrylate, uniformly mixing, and adding 20g of dodecyl mercaptan into a reaction container; (4) After reacting for 1 hour, adding 1.1g of ammonium persulfate initiator, dropwise adding the mixed solution of acrylonitrile and methyl acrylate into the reaction container, controlling the dropwise adding speed to be 15 drops/second, and dropwise adding the reaction time to be 2.5 hours; (5) after the dropwise addition is finished, continuing the reaction for 2 hours; (6) And after the reaction is finished, taking out the reaction liquid, adding 600g of anhydrous magnesium sulfate demulsifier for demulsification, and finally filtering and drying the demulsified product to obtain the final product poly (acrylonitrile-methyl acrylate).
The blender is used for blending cutting fluid stock solution into cutting fluid which is regenerated and purified; the addition amount is 0.5-2 wt% of the cutting fluid after the regeneration and purification of the cutting fluid.
2. The application of the method for recycling the cutting fluid of the processing machine tool according to claim 1 is characterized in that: the method for recycling the cutting fluid of the processing machine tool is applied to the field of recycling of the cutting fluid for processing thin-walled workpieces.
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| CN202110066652.5A CN112812880B (en) | 2021-01-19 | 2021-01-19 | Machining tool cutting fluid recycling method and application thereof |
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| CN202110066652.5A CN112812880B (en) | 2021-01-19 | 2021-01-19 | Machining tool cutting fluid recycling method and application thereof |
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| CN112812880A CN112812880A (en) | 2021-05-18 |
| CN112812880B true CN112812880B (en) | 2023-03-10 |
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| CN107098505A (en) * | 2017-05-26 | 2017-08-29 | 苏州易歌环境科技有限公司 | A kind of environment-friendly type used cutting liquid circulation process method and its cleaning equipment |
| CN110846119A (en) * | 2019-11-27 | 2020-02-28 | 湖北诚祥科技有限公司 | Water-based metal working fluid waste liquid regeneration and reuse treating agent and regeneration and reuse treating method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107098505A (en) * | 2017-05-26 | 2017-08-29 | 苏州易歌环境科技有限公司 | A kind of environment-friendly type used cutting liquid circulation process method and its cleaning equipment |
| CN110846119A (en) * | 2019-11-27 | 2020-02-28 | 湖北诚祥科技有限公司 | Water-based metal working fluid waste liquid regeneration and reuse treating agent and regeneration and reuse treating method |
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