KR101561244B1 - Treatment system of metalworking fluid and cleansing solution - Google Patents

Abstract

The present invention relates to a treatment system for metalworking fluid and cleaning solution, which may include: a preprocess filter which is provided to remove fine metal chips by pumping cleansing solution into a cleansing tank containing fine metal chips and metalworking fluid; an oil and water separation tank which returns the cleansing solution after combining the cleansing solution and the metalworking fluid, which are filtered by the preprocess filter to 10-20 microns of oil particles; a concentration tank which stores and concentrates the mixed liquid of the cleansing solution which is passed through the oil and water separation tank and the metalworking fluid which is emulsified in a micellar form, and discharges the cleansing solution and the metalworking fluid when the concentration reaches a predetermined level; a membrane filter which filters the emulsified metalworking fluid and particles while circulating the mixed liquid stored in the concentration tank and returns the cleansing solution after passing and separating the cleansing solution containing the cleaner components; and a heater which is installed in at least one of the oil and water separation tank and the concentration tank and heats the liquid at 50-80°C. In the case of processing the cleansing solution containing processed oil by using the treatment system for cleansing solution and metalworking fluid, contaminants such as chips and microorganisms can be effectively removed, and water soluble emulsion oil can be separated and reused, which minimizes contamination of the membrane and reduces maintenance costs.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a metal-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a metal-sharing and cleaning solution processing system, and more particularly, to a system and method for continuously and intermittently supplying a cleaning solution and a waste oil, Use of a cleaning tank for cleaning a processed metal product by receiving a cleaning solution containing a cleaning agent is provided. The metal product is washed and the metal is shared and a fine metal chip is included therein. A pretreatment filter configured to pump the cleaning solution in the cleaning tank and remove the fine metal chips; A water separator for collecting the filtered washing solution and oil particles of about 10-20 microns into the pretreatment filter and returning a part of the washing solution to the washing tank; A condensing tank for storing and concentrating the mixed solution of the washing solution and the micelle-type emulsified metal that has not been returned to the washing tank after passing through the water washing tank, and discharging the mixed solution when the metal washing reaches a predetermined concentration; A membrane filter circulating the mixed solution stored in the thickening tank and filtering the covalent and particles of the emulsified metal and passing the washing solution containing the washing agent component through the washing tank and returning to the washing tank; And a heater provided at one or more of the water-oil separation tank and the concentration tank for heating the liquid to a temperature in the range of 50 to 80 ° C.

Various kinds of cutting oil, sintering oil, grease, anti-rust oil, rolling oil, lubricating oil etc. are applied to the surface of the mechanical device or machine parts after metal processing, electronic circuit board after printing, cold rolled steel sheet during steel manufacturing process A considerable amount of impurities such as metal chips, dust, and the like generated during the process of metal scavenging and remanufactured fat-and-oil materials, oxidation scale, and rolling are adhered. The surface impurities of these various industrial finished products are required to be cleaned and removed beforehand because the efficiency of the plating process, the coating process, the surface treatment process, and the electrostatic process of the assembly process is lowered. CFC (chlorofluorocarbon) cleaners and chlorine cleaners such as methylene chloride, PCE and TCE have been used to clean the surfaces of conventional products. However, since these cleaners cause environmental damage such as destruction of the ozone layer and threat of safety and health, Environmentally friendly water-soluble cleaning agents have been developed and used instead of these cleaning agents. A water-soluble washing solution is an aqueous solution containing an alkali or a soap component at a concentration of 5-10%, and is known to efficiently remove various contaminants on the surface of a workpiece. Essentially, various water-soluble washing agents are emulsified in water phase Surfactants for dispersing solid particles, dispersing agents for dispersing solid particles in water, wetting agents and other additives.

Depending on the repeated use of the aqueous washing solution, various metals separated from the processed product are contained in the aqueous solution, and the content of the metal chips and the like increases, and the surfactant and the dispersant are added to the cleaning agent to emulsify or disperse them. When the amount of the surfactant and dispersant in the cleaning agent and the amount of contaminants associated with them is increased to some extent, the oil film is formed on the surface of the cleaning agent and particles such as metal chips are deposited on the bottom of the washing tank. When this happens, discard the aqueous wash and replace with a new cleaner. However, since the detergent in this state still has a considerable amount of cleaning power, it is a waste of resources and costs. Furthermore, when disposing a water-soluble washing solution containing various surfactants, dispersants and other additives, it is difficult to apply a conventional water treatment system. Therefore, a recycling method has been proposed (U.S. Patent No. 5,409,613) in which the amount of the waste cleaner is minimized or the waste cleaner is not generated at all.

The US patent is based on the fact that by means of a membrane having a properly selected pore size, the detergent component is retained in the aqueous wash liquor and only the various covalent and dispersed particles of the various emulsified metals are removed thereby enabling the aqueous wash liquor to be used repeatedly Microfiltration is applied. In this way, as the reuse cycle progresses, the concentration of contaminants (metal-enriched emulsions, dispersed particles, etc.) in the concentration tank increases. The solid particles accumulated above the dispersing ability of the dispersing agent precipitate to the bottom of the thickener, such as oil, grease, etc., accumulated above the emulsifying ability of the emulsifier, float on the surface of the thickener (i.e., the generation of floating oil). Therefore, the float oil is continuously or cyclically separated from the thickener surface and periodically removes sediment from the bottom of the tank. The U.S. patent application has made it possible to use a more efficient detergent system than the conventional method of using the batch water-soluble detergent. However, in the case of the above-mentioned invention, various kinds of sludge, metal particles, metal soap, floating oil (oil having particle size of about 50-150 mu m), physically emulsified oil (not chemically emulsified by surfactant, The oil is physically finely fragmented to form a film of fine oil particles having a size of about 10-30 탆 which acts as a colloid in the aqueous solution) to contaminate the membrane, thereby causing a fouling phenomenon which deteriorates the separating ability of the membrane . In order to remove such fouling, the present invention adopts a method of periodically backwashing the membrane. However, in order to maintain the ability of separating the membrane smoothly, the backwashing cycle is short and the separation efficiency of the membrane is low , And the membrane structure is damaged due to repetitive backwashing. In addition, the US patent invention has a problem in that the total volume of the apparatus is increased because the washing liquid classified by the tangled oil separator is separated from the floating oil (tare oil) by a separate oil separator (other organic).

On the other hand, the inventor of the present invention has made improvements to the disadvantages of the patented invention, and has filed a patent application relating to a method and an apparatus for effectively removing various metal particles, metal soap, and processing oil contained in contaminated washing liquid, (Patent Registration No. 327166). Further, the present inventor has provided an ozone injection process for preventing the contamination of the washing tub by the generation of microorganisms and the odor generation and the deterioration of the cleaning agent concentration, thereby eliminating the inconvenience of periodically washing the membrane filter contaminated with bacteria such as bacteria or fungi A stable permeation rate is ensured by using a non-contaminated membrane filter, the pH of the washing liquid discharged from the membrane filter is measured, and the measured pH value is converted into an electrical signal and input as a control signal of the detergent input control valve A control signal input process is provided to efficiently improve the input of the detergent and to adjust the pH concentration of the washing tank to a constant level (Korean Patent Laid-Open Publication No. 2002-0070186). However, there is a problem that the separation efficiency of other oils is low during the pretreatment.

Accordingly, the applicant of the present invention has proposed an ozone injection apparatus including an ozone generator for generating ozone capable of sterilizing bacteria and an ozone duct for allowing ozone generated in the ozone generator to flow into the washing tank; A washing tank filled with a washing solution for washing the processed metal product; A pretreatment filter configured to clean the metal product to remove the fine metal chips from the cleaning solution of the cleaning tank containing the metal and the fine metal chips; A thin film type oil separator which combines oil particles of about 10 to 20 microns into the cleaning solution and the metal covalage filtered in the pretreatment filter to remove the tug; A thickener for storing a mixture of the washing liquid and the micellar emulsified metal powder that has passed through the thin film type tall oil separator; And a membrane filter which is immersed in the mixed solution stored in the thickener to emulsify the metal covalent and particles and the detergent component can be passed through and separated in the aqueous washing solution. 603855). FIG. 1 is a schematic block diagram of the apparatus for treating and suspending metals in accordance with the aforementioned Japanese Patent No. 603885.

However, the invention disclosed in the above document also poses a health threat to workers due to the use of ozone, and the separation efficiency is not higher than expected due to the slow flow rate inside the membrane filter, The cleaning and replacement cycle is still about 2 to 8 weeks, so that it takes a relatively long time and manpower to be put into operation and maintenance, thereby avoiding the use in the field.

U.S. Patent No. 5,409,613 Korean Patent No. 327166 Korean Patent No. 603855

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a process system for effectively removing contaminants such as tallow, chips, and microbes introduced into a washing tank and separating and reusing the water-soluble emulsion oil to be mixed therewith, In consideration of the inconvenience caused by frequent use and exchange of filters and the economical efficiency of the maintenance cost, it is possible to suppress the microbial propagation and to extend the cleaning period of the other oil separation tanks, to achieve the high efficiency of microbial sterilization and deodorization, Thereby increasing the flow rate of the metal.

According to an aspect of the present invention, there is provided a metal-polishing system for treating a metal product, which includes a cleaning agent supplied continuously or intermittently, A pretreatment filter configured to clean the metal product to pour a cleaning solution of a cleaning tank containing metal and a fine metal chip to remove the fine metal chip; A water separator for collecting the filtered washing solution and oil particles of about 10-20 microns into the pretreatment filter and returning a part of the washing solution to the washing tank; A condensing tank for storing and concentrating the mixed solution of the washing solution and the micelle-type emulsified metal that has not been returned to the washing tank after passing through the water washing tank, and discharging the mixed solution when the metal washing reaches a predetermined concentration; A membrane filter circulating the mixed solution stored in the thickening tank and filtering the covalent and particles of the emulsified metal and passing the washing solution containing the washing agent component through the washing tank and returning to the washing tank; And a heater for heating the liquid to a temperature ranging from 50 to 80 DEG C, wherein the heater is installed at any one or more of the oil-water separation tank and the thickening tank.

Also, the present invention provides a metal-sharing and washing solution processing system, wherein the discharge of the mixed solution in the concentration tank is performed when the metal-sharing concentration of the mixed solution is in the range of 25 to 40%.

Further, the present invention is characterized in that the above-described water separation trough includes a first separator including a liquid cyclone having an upper drain for discharging oil having a relatively small specific gravity and a lower drain for discharging a liquid having a relatively large specific gravity, And a second separation tank in which water and oil are separated from the liquid discharged from the drain, are connected in series.

In addition, the present invention provides a metal sharer and cleaning solution treatment system further comprising an acid pipe under the second separation tank capable of continuously or intermittently injecting compressed air in a direction opposite to the flow of the metal sharer and the cleaning solution.

Since the metal product processing oil and the washing liquid treatment system of the present invention uses a liquid cyclone and / or a heater, it is possible to sterilize the ozone without using harmful ozone to the human body and to lower the viscosity of the fluid, In case of using the metal product processing oil and the washing solution treatment system of the present invention, it is possible to effectively remove contaminants such as tallow, chips and microorganisms introduced into the alkali washing tank and to separate and reuse the water-soluble emulsion oil The contamination of the membrane can be minimized, and the maintenance cost can be drastically reduced.

FIG. 1 is a system configuration diagram showing an example of a metal-sharing and washing-liquid treating apparatus of Japanese Patent No. 603885
FIG. 2 is a system configuration diagram showing the structure of a metal-sharing and cleaning solution processing system according to the present invention.
3 is a flow chart for explaining the operation of the metal-sharing and cleaning solution processing system according to the present invention
FIG. 4 is a graph showing the flow rate of a membrane filter according to the concentration of metal in the concentration tank in the embodiment of the present invention; FIG.
FIG. 5 is a graph showing the time-dependent flow rate of a membrane filter when the concentration of metal enriched in the concentrating tank is discharged every 48 hours in the embodiment of the metal-
6 is a system configuration diagram showing the structure of another embodiment of a metal-based sharing and cleaning solution processing system according to the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flow chart illustrating a conventional metal sharer and wash solution processing apparatus and flow, and FIG. 2 is a schematic illustration of a metal sharer and wash solution processing system 100 in accordance with the present invention. 1 and 2, the washing solution processing system is a system for supplying a washing solution including a continuous or intermittently supplied cleaning agent to the cleaning solution of the washing tank 10 for washing the processed metal product, , It is possible to remove contaminants and to separate and discharge the oil, and to recycle the metal sharer and the washing liquid, thereby contributing to resource saving and prevention of contamination and lowering the processing cost. As described above, when a metal product is processed, a metal chip, a cutting oil, a cooling liquid, and the like are buried on the surface of the product. Therefore, the metal product is washed in such a manner that the metal product is immersed in the washing tank 10 filled with the washing solution containing the washing agent, or showered with the washing solution. As used herein, the expression " washing tank " refers to a space for showering a metal product with a water tank or a washing liquid for washing the metal product into which the processed metal product is immersed, and a water tank for collecting the washed washing liquid. The cleaning tank 10 may be in the form of a single water tank but may be a clean tank 10 which is usually directly cleaned and supplied with a new cleaning solution and detergent, Weighted structure of the dirty tank (waste liquid storage tank) 80 to be stored overflow. In the embodiment of the present invention, the metal product is washed between the washing tank 10 and the pretreatment filter 20 so that the washing solution of the washing tank 10 containing the metal and the fine metal chip is overflowed and stored. ) As an example. The cleaning liquid containing the desorbed metal and the metal chip is overflowed from the washing tank 10 and temporarily stored in the waste liquid storage tank 80. [

As can be seen in FIG. 2, the metal shunt and wash solution treatment system 100 of the present invention is a system for cleaning and cleaning a metal product, pumping a cleaning solution of a cleaning tank 10 containing a metal- A pretreatment filter (20) formed to form a membrane; A water separation tank 30 for collecting the washing solution filtered by the pretreatment filter 20 and the oil particles of about 10-20 microns into the metal solution and returning the washing solution to the washing tank 10; A thickener 40 for storing and concentrating a mixed solution of the washing solution and the micelle-like emulsified metal that has passed through the water-retaining tank 30 and has not been returned to the washing tank, and discharging the mixed solution when the concentration of the metal reaches a predetermined concentration; A membrane filter 50 circulating the mixed solution stored in the thickening tank 40 and filtering the covalent and particles of the emulsified metal and passing the washing solution containing the cleaning agent component through the washing tank 10 and returning to the washing tank 10; And a heater 90 installed at one or more of the water repelling tank 30 and the thickener 40 to heat the liquid to 50 to 80 ° C.

The cleaning liquid containing the metal and stored in the washing tank 10 or the waste liquid storage tank 80 is passed through the pretreatment filter 20 to remove fine metal chips and impurities. The kind of the pretreatment filter 20 is not particularly limited and may be any one capable of removing fine metal chips and impurities. As a preferred form of the pretreatment filter 20, a strainer, a bag filter, a roll filter, a cartridge filter, a plate filter and the like made of a metal material, a synthetic resin material or a paper material can be mentioned. In the case of the pretreatment filter 20, Pressure and the like, and when the level reaches the level at which the filter is to be replaced, a warning signal may be given to replace the pre-filter 20.

The water / oil separation tank (30) of the present invention separates the floating oil component and the cleaning liquid. The water treatment tank 30 recirculates the washing solution to the washing tank 10 by removing the flooded soil water or the float oil contained in the water-soluble washing solution or the physically emulsified oil, It is possible to remove the oil and the like and then flow out to the concentration tank 40. In the metal sharer and wash solution treatment system 100 of the present invention, the above-described water tank separator 30 may be a well-known water tank separator, or may be a relatively large water tank, (31) including a liquid cyclone (310) having a lower drain (311) for discharging a liquid having a large specific gravity and a separator (31) for separating water and oil from the liquid discharged from the liquid cyclone 2 separator 32 may be a doubly-connected unit connected in series. 6 is a system configuration diagram showing the structure of another embodiment of a metal-based sharing and cleaning solution processing system according to the present invention. 2, which is one embodiment of the metal-based sharing and washing solution processing system 100 of the present invention, when the heater is installed in the water separation tank 30 or the concentration tank 40, the flow rate of the membrane filter 50 is increased, The maintenance is greatly improved as compared to a conventional metal-free curing and cleaning solution processing system that does not have a heater. However, in general, a porous filter of the type of a porous filler, which is itself a biofilm reactor, promotes decay, and even if there is a cleaning agent, the filler may be filled with oil during prolonged use. Therefore, in the case of the metal-based cleaning and washing solution processing system 100 of the present invention, the above problem can be solved by disposing the liquid cyclone 310 in the double-streamed water separation tanks 31 and 32. The liquid cyclone 310 of the first separating tank 31 relatively discharges troughs that are lighter than the cleaning liquid to the outside of the liquid cyclone 310 through the upper drain 311 without flowing into the second separation tank 32 In addition, the washing liquid having a small amount of oil is allowed to flow through the lower drain 312 of the lower part, thereby minimizing the contamination of the second separation tank 32, thereby inhibiting microbial growth, extending the cleaning cycle and securing a stable flow rate.

 The second separation tank 32 may be a known oil-water separator, a partition wall or a thin film as described above, and may be of a combined type, CPS, or EPS type. The second separation vessel 32 used in the embodiment of the present invention is formed by mixing physically emulsified oil particles of 10 to 30 microns in size and floating oil particles of 60 to 120 microns in size with a porous antibacterial filler, According to Darcy's law, due to the difference in permeation coefficient between metalworking oil and oil particles, a velocity gradient occurs and the difference is 50 times, and the oil particles in front and the oil particles in the rear are combined with each other, According to Stoke's law, the speed at which the oil is separated and separated is easily separated from the diameter of the oil particle, because it is in proportion to the diameter of the oil particle. The floating oil is separated and removed by a pipe weir (not shown).

The metal sharer and wash solution processing system 100 of the present invention may further include an air diffuser 33 and an air diffuser 33 which can continuously or intermittently spray compressed air in a direction opposite to the flow of the metal- ). ≪ / RTI > The compressed air continuously or intermittently injected through the air diffusing pipe 33 can act to suppress the propagation of the anaerobic bacteria simultaneously with the removal of the obstructed foreign matter of the porous filler of the second separation tank.

A part of the filtrate (a mixed solution of the washing solution and the micelle-like emulsified metal) is returned to the washing tank 10 and the remainder is transferred to the thickening tank 40, And the filtration step of separating the washing liquid through the filter 50 is performed. The ratio of the mixed liquid transferred to the washing tank 10 and the thickening tank 40 may vary depending on the degree of separation of the tare oil. As a result of the study conducted by the inventor of the present invention, . The membrane filter 50 has a plurality of pores formed inside and outside a predetermined size range for filtration. The size of the pores is not particularly limited, but is preferably in the range of 1 to 100 nm, which is the ultrafiltration membrane level in view of the object of the present invention.

FIG. 3 is a flow chart illustrating the operation of the system 100 for processing and sharing a metal according to the present invention. As shown in FIG. 3, the thickener 40 stores and concentrates a mixture of the cleaning solution and the micelle-like emulsified metal that has passed through the water-oil separation tank 30, and when the metal- . That is, if the concentration of the metal covalent in the mixed liquid is increased, the viscosity of the mixed liquid increases and the flow rate of the mixed solution decreases. As a result, the efficiency of the system 100 decreases. Therefore, in the concentration tank 40, It is possible to lower the concentration of the metal-sharing in the mixed liquid. Accordingly, the thickener 40 is provided with a coolant storage tank (not shown) and a chip box (not shown) for separating the cleaning liquid through the membrane filter 50 for a predetermined period of time and transferring the waste oil through the drain valve to remove impurities, Not shown) may be added. In an embodiment of the present invention of a system 200 for treating and treating metal solids in accordance with the present invention, the flow rate in the membrane filter 50 is less than about 2.0 liters per minute (liter / min.), ), The concentration of the metal is about 20% or more, and the concentration of the metal is about 20% or more. The concentration of the metal-containing gas discharged from the thickener 40 is not particularly limited, and may be set to a certain level by the user depending on the flow rate of the membrane filter 50 or the need. It is preferable that the concentration of the metal-sharing in the mixed liquid present in the thickener 40 is in the range of about 20 to 40%. It is desirable for the membrane filter 50 to determine the shared release time of the metal of the thickener 40 at a flow rate of 0.5 to 3 liters per minute for the service life of the membrane filter 50 and the efficiency of the system 100, This is because the concentration range of the metal share in the mixed liquid corresponds to this range.

4 and 5 are graphs showing the flow rate of the membrane filter 50 according to the concentration of the metal in the concentration tank 40 in the embodiment of the metal-scavenging and washing solution treatment system 100 according to the present invention, 40 is a graph showing the time-dependent flow rate of the membrane filter 50 in the case where the concentration of the concentrated metal is discharged every 48 hours. 4 and 5, in the case of the metal covalent and cleaning solution treatment system 100 of the present invention, by simply discharging the concentrated metal shavings (and the mixed solution of the cleaning solution) to the thickener tank 40, 50) is restored to its original state. In the case of the conventional metal sharer and wash fluid treatment device, the membrane filter 50 must be cleaned using chemicals when the flow rate is lowered. However, the metal sharply and wash fluid treatment system 100 of the present invention is not required to clean the membrane filter 50 40, the flow rate is restored only by discharging the concentrated metal share.

The metal sharer and cleaning solution treatment system 100 of the present invention includes a heater 90 installed at one or more of the water separation tank 30 and the concentration tank 40 to heat the liquid to 50 to 80 ° C. As shown in FIG. 1, the conventional method for treating and suspending metals has been developed to prevent the contamination of the washing tub 10 due to the generation of microorganisms such as bacteria and fungi, the generation of bad odor and the deterioration of the cleaning agent concentration, 50) was prevented from being contaminated by the ozone sterilization process. The ozone used in the ozone sterilizing process is injected from the ozone injector 11 and is adjusted according to the degree of contamination of the washing tub 10 per unit time. However, as described above, the use of ozone can adversely affect the health of factory workers. Therefore, the ozone sterilization process is eliminated in the present invention. Instead, the metal covalent and cleaning solution processing system 100 of the present invention includes a heater 90 installed at one or more of the water-oil separation tank 30 and the concentration tank 40 to heat the liquid. The heater 90 is installed in the water separation tank 30 and / or the concentration tank 40 to heat the liquid in the water separation tank 30 and / or the concentration tank 40 to lower the sterilizing effect and the viscosity of the liquid. The viscosity of the fluid is lowered as the temperature is higher. The lowering of the viscosity can increase the flow rate during the membrane filtration, thereby increasing the filtering efficiency and preventing the contamination of the filter 50, thereby extending the replacement period of the filter 50 . The heating temperature of the fluid using the heater 90 is not particularly limited, but is preferably 50 DEG C or higher for the purpose of sterilization and lowering the fluid viscosity. It is more preferable that the heating temperature is in the range of 50 to 80 캜, more preferably 60 to 70 캜. If the heating temperature is less than 50 캜, the sterilizing effect is insignificant. On the other hand, if the heating temperature is higher than 80 캜, the sterilizing effect is improved, but the energy cost is high and the washing solution is evaporated more and the membrane filter 50 mainly made of synthetic resin can not stand This is because there are side effects such as melting. Table 1 below compares the fluid characteristics in the membrane filter 50 of the metal sharer and wash fluid treatment system of the present invention and the metal sharer and wash fluid treatment system 100 of the present invention, in which ozone sterilization is applied without heating.

Conventional system The system of the present invention Time (hr) Membrane flow rate (liter / min) Time (hr) Membrane flow rate (liter / min) 0 1.8 0 3.5 8 1.6 12 3.3 24 1.3 24 3.0 48 1.1 48 2.0 72 0.7 Concentrator discharge - 96 0.4 0 3.5 120 0.2 12 3.2 0 (chemical cleaning) 1.8 24 3.0 8 1.5 48 2.0

(Standard: KOCH HFM-251 5 foot 16 membrane area: 1.1m ² )

As can be seen in Table 1 above, the inventive metal-based scrubbing and cleaning solution treatment system 100 has a treatment efficiency of about twice that of the conventional system, and the membrane filter 50 can be removed from the concentration tank 40, the efficiency of the membrane filter 50 can be increased to an original state.

In addition, the system for treating and suspending metals in the present invention 100 includes a pH measuring tank 60 for receiving a washing solution separated by using the membrane filter 50, A controller for receiving a pH value of the pH meter and generating an electrical signal based on the pH value, a detergent reservoir 70 for receiving the detergent, and a controller And a detergent supply control valve 71 for receiving the electrical signal of the controller and adjusting the valve by the control signal. Therefore, the metal-based common cleaning and washing solution processing system 100 measures the pH value of the washing liquid separated through the filtration process, outputs an electrical signal from the controller according to the pH value, So that the introduction of the cleaning agent can be automatically controlled from the separate cleaning agent reservoir 70 that receives the cleaning agent by using the cleaning agent injection control valve 71 that is controlled by receiving the signal. When the pH value of the washing liquid discharged through the membrane filter 50 drops to 8 or less, the pH meter, the controller, and the detergent loading control valve 71 are electrically A control signal is generated to open and close the cleanser supply control valve 71, and the cleansing solution is supplied to maintain the pH concentration of the cleansing bath 10 properly. The pH value of the washing solution is preferably in the range of 7 to 11, more preferably in the range of 8 to 10.

The cleaner injection control valve 71 may be controlled by a controller having a specific algorithm, and the specific algorithm may be applied to the cleaning solution injection control valve 71 according to the cleaning solution input precision or the cleaning solution injection reaction time, such as PID, PI, Of course.

It is preferable to install a discharge pump and an electromagnetic flow meter at the front ends of the respective devices of the cleaner reservoir 70, the washing tank 10, the pretreatment filter 20, the oil separator 30 and the thickener 40, Flow rate, and emission per unit time can be recorded, enabling more detailed monitoring.

The embodiments of the present invention described above should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

10 Washing tank 20 Pretreatment filter
30 Oil separation tank 31 1st separation tank
32 Second Separator 33 Acoustic engine
40 thickener 50 membrane filter
60 pH measuring tank 70 Cleaning agent storage tank
80 Waste liquid storage tank 90 Heater
100 Metal Sharing and Washing Liquid Treatment System
310 liquid cyclone 311 lower drain
312 upper drain

Claims (4)

Use of a cleaning tank for cleaning a processed metal product by supplying a cleaning liquid containing a continuous or intermittently supplied cleaning agent In a metal-based cleaning and cleaning liquid processing system for treating and recycling a metal-
A pretreatment filter configured to clean the metal product to remove the fine metal chips by pumping a cleaning solution of the cleaning tank containing the metal and the fine metal chips;
A first separator including a liquid cyclone having an upper drain capable of discharging oil having a relatively small specific gravity and a lower drain discharging a liquid having a relatively large specific gravity; And a second separation tank capable of separating the oil from the second separation tank, the second separation tank being connected in series to the first separation tank, the oil particles having a particle size of about 10-20 microns are incorporated into the cleaning solution and the metal- ;
A condensing tank for storing and concentrating a mixture of the washing solution and the micellar emulsified metal that has not been returned to the washing tank after passing through the water collecting tank, and discharging the mixed solution when the concentration of the metal reaches the predetermined concentration;
A membrane filter circulating the mixed solution stored in the thickening tank and filtering the covalent and particles of the emulsified metal and passing the washing solution containing the washing agent component through the washing tank and returning to the washing tank;
And a heater installed at any one or more of the oil-water separation tank and the thickening tank for heating the liquid to a temperature in the range of 50 to 80 占 폚. The method according to claim 1,
Wherein the discharge of the mixed liquor in the thickener is performed when the metal-sharing concentration in the mixed liquor is in the range of 20 to 40 wt%. delete The method according to claim 1,
Further comprising: an oxidant capable of continuously or intermittently injecting compressed air in the lower portion of the second separation tank in a direction opposite to the flow of the metal-based cleaning and washing liquid.

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