JPS6172098A - Method for preventing degradation of liquid such as water-soluble metal working fluid, water, etc. - Google Patents

Abstract

PURPOSE:To prevent the degradation of various liquids, continuously for a long period, by passing a liquid such as water-soluble metal working fluid, water, etc. through a vessel containing a sterilizing agent prepared by the ionic adsorption of a sterilizing metal to an adsorbent. CONSTITUTION:A sterilizing metal such as silver, copper, etc. is adsorbed to an adsorbent 1 such as zeolite, activated carbon, etc. by ion-exchange, and the obtained sterilizing agent 2 is put into a vessel 3 having e.g. a cylindrical form. A liquid 4 such as water-soluble metal working fluid, water, etc. is passed through the vessel 3 to effect the dissolution of the metallic ion from the sterilizing agent 2 into the liquid 4, and the sterilizing liquid 5 containing dissolved metallic ion is added to the liquid 6 for the degradation-preventing treatment. EFFECT:Effective to prevent the degradation of water-soluble metal working fluid for the cooling or lubrication of a grinding machine, NC-machine tool, etc., rolling oil for a rolling mill of ironworks, cooling water for cooling tower, water for pisciculture tank and goldfish basin, etc., and water of swimming pool, etc.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The corrosion prevention method of the present invention is applicable to water-soluble working oil used for cooling and lubricating grinding machines, numerical control machines, etc., and rolling equipment in steel plants. Used to prevent spoilage of various liquids used in various fields, such as rolling oil used in cooling towers, cooling water used in cooling towers, water used in fish tanks, aquaculture tanks, goldfish tanks, etc., and pool water. It is.

(Prior art) Among the liquids used in various fields, water-soluble machine oil used for cooling and lubricating machine tools, for example, is pumped up from tank A by pump P as shown in Figure 5, and is used for machine tools. It is sprayed onto the B blade and used for cooling, lubrication, cutting, washing away polishing powder, etc.

If water-soluble machine oil is used for a long period of time, the oil may become contaminated, microorganisms in the pond may rot and produce a bad odor, and the oil may become acidic due to a drop in pH, causing corrosion of machine tools and workpieces.
If the appearance of the oil changes (emulsion breakage, separation of oil and water, turbidity of the liquid, blackening, etc.), rust occurs, bacteria clumps, extracellular substances, cutting chips, grindstone powder, etc. cause damage to tank A or the pump. If the filter or separator of the P is clogged,
Pipes may become clogged due to slime molding.

As a result, its properties as an oil agent deteriorate and become unusable.
There is the hassle of having to replace the water-soluble working oil every short period of time (usually rotting begins around 14 days).

However, when replacing water-soluble machine oil, the machine must be stopped, flushed, and sterilized, so it takes time to start the machine after replacing it. There is also the problem that replacement costs a lot of money, and waste liquid treatment also costs money.

Conventionally, the following measures have been taken to address these issues.

When diluting the stock solution, use sterilized tap water to prolong the period until it spoils, lower the dilution rate (increase the concentration of the stock solution), or use a commercially available preservative. Make it last longer.

A large-capacity liquid tank will be installed, and each machine in the factory will be connected to it via piping, and the progress of spoilage will be suppressed by centrally controlling and preventing liquid stagnation.

(Problem that the invention attempts to solve) Each of the conventional methods has the following problems.

The method of using sterilized tap water to dilute the stock solution has an initial effect, but long-term effects cannot be expected, and it is uneconomical if used at a low dilution rate.

The method of using a commercially available preservative has the trouble of having to periodically replenish the preservative.

When using a large-capacity liquid tank, not only does it require a huge amount of equipment, but also the piping etc. become clogged over time, making it impossible to achieve sufficient effectiveness over a long period of time. Not utilized.

(Means for Solving the Problems) The object of the present invention is to use a sterilizing metal in an ionized state, and to elute the metal ions into a liquid to stably supply a small amount of sterilizing liquid for a long period of time. The objective is to ensure that corruption prevention is carried out continuously over a period of time.

In the rot prevention method of the present invention, a sterilizing metal is added to an adsorbent 1.
A disinfectant 2 obtained by ion-exchanging is stored in a container 3,
The metal ions from the disinfectant 2 are eluted into the liquid 4 by passing a liquid 4 such as water-soluble working oil or water into the container 3, and the sterilizing liquid 5 from which the metal ions have been eluted is drained into the rot prevention liquid 6. This is how it was done.

Bactericidal agent 2 uses bactericidal metals such as silver and copper with zeolite,
The ions are exchanged with an adsorbent such as activated carbon, which is then stored in a cylindrical container 3 as shown in FIG. 2, or in other appropriately shaped containers or bags.

Zeolite is used as the adsorbent 1, silver is used as the bactericidal metal, and various methods can be considered for ion-exchanging the silver with the adsorbent 1, for example, the following method may be used.

AgN0. diluted to an appropriate concentration. (Silver nitrate) solution is heated, and ZeO (zeolite) is immersed in it and stirred to exchange ions of sodium and silver in the zeolite.

In this case, it is preferable to use a zeolite that is spherical, for example, about 4 to 5 mm in diameter or about 1 to 2 mm in diameter, is difficult to swell, and is hard to powder.

(Example) As an example of the present invention, what is shown in FIG. 1 is a case where the liquid 6 for preventing spoilage is water-soluble working oil. In FIG. 1, 7 is a tank, 6 is a water-soluble working oil, 9 is a pump for pumping up the water-soluble working oil, and 10 is a storage tank for storing the pumped water-soluble working oil 6.

A settling section 11, a liquid amount controller 12, and a lyre container 3 in which a disinfectant 2 is stored are provided in the storage tank IO.

The settling section 11 is for precipitating foreign matter mixed into the water-soluble working oil 6 being pumped up, and includes overflow partition plates 13a, 13b and underflow partition plate 13c.
is provided.

The oil amount controller 12 is an upper limit switch 1 that detects the upper limit of the liquid level.
4a and a lower limit switch 14b for detecting the lower limit of the liquid level are attached to the shaft 15. Among these, the upper limit switch 14a
The lower limit switch 14b is turned on when the movable element 16a, which moves up and down along the axis 15, rises and presses it, and the lower limit switch 14b turns on when the mover 16b, which moves up and down along the axis 15, descends and presses it.

Each switch 14a, 14b is connected to the pump 9, and when the upper limit switch 14a is turned on, the pump 9 is stopped and pumping of the water-soluble working oil 6 from the tank 7 is stopped, and the lower limit switch 14b is turned on. ', the pump 9 operates and the water-soluble working oil 6 is pumped up from the tank 7.

Note that 16 in FIG. 1 is an electric control unit, and 17 is a pump that pumps up the water-soluble working oil 6 in the tank 7 and supplies it to the workpiece.

(Operation of the embodiment) The water-soluble working oil 6 pumped up by the pump 9 from the tank 7 shown in FIG.
overflows, underflows through the partition plate 13b, overflows through the partition plate 13c, and reaches the storage section 18 of the storage tank 10. Impurities such as abrasive powder and cutting chips mixed in the water-soluble working oil 6 are precipitated in the oil in the settling section 11 during repeated overflow and underflow.

The amount of water-soluble working oil 6a in the storage section 18 is controlled by the oil amount controller 12.
controlled by When the oil amount increases and the liquid level rises, the upper limit switch 14a is turned on and the pump 9 stops pumping up the oil. When the oil amount decreases and the liquid level falls, the lower limit switch 14b is turned on and the pump 9 stops pumping up the oil. Pumping of oil will begin. By repeating this process, the amount of oil in the reservoir 18 is set between the upper limit switch 14a and the lower limit switch 14b.

The water-soluble working oil 6a in the reservoir 18 passes through the container body 3. In this case, the water-soluble working oil 6a passing through the container body 3 comes into contact with the disinfectant 2 therein, and a very small amount of metal ions adsorbed on the adsorbent l is eluted into the water-soluble working oil 6a in units of PPb. be done. The water-soluble working oil 5 from which metal ions have been eluted is the container body 3
is dripped into the tank 7 from the outlet 20 of the tank 7.

(Other Embodiments) In the one shown in FIG. 1, the water-soluble working oil 6 in the tank 7 is pumped up into the storage tank 10 by the pump 9, but the supply of liquid into the storage tank 10 is Not limited to the method shown in Figure 1,
For example, it may be as shown in FIGS. 3 and 4.

In the case shown in FIG. 3, the pump 9 is not used to pump up the water-soluble working oil 6 in the tank 7 to the storage tank 10, but the pump 17 is used to pump up the water-soluble working oil 6 to the workpiece, etc. The water-soluble working oil 6 that has been pumped up is divided into a branch path 21, and the water-soluble working oil that has been flown into one branch is supplied into the container body 3 through the mesh filter 22 and the flow rate adjustment valve 23.
The sterilizing liquid flowing out from the tank 7 is dripped into the water-soluble working oil 6 of the tank 7.

In Fig. 4, 24 is a filter housing, 22 is a stainless steel mesh filter, 23t*flow rate adjustment valve,
25 is a pedestal, and 3 is a container body.

The above explanation concerns the case of water-soluble oil used for cooling and lubricating grinding machines, numerical control machines, etc.; The sterilizing liquid flowing out from the outlet 20 of the body 3 may be dripped into the water in the fish tank, and in order to prevent the water in the pool from spoiling, the sterilizing liquid flowing out from the outlet 20 of the body 3 may be dripped into the water in the fish tank. Just drop it into the water.

Furthermore, when using in other fields, the container 3 containing the sterilizing agent 2 may be used depending on the purpose.

When used in any field, the container 3 containing the sterilizer 2 should not be placed in a stagnant liquid, but should be placed in a flowing liquid or a container. By passing water through the body 3, the water not only passes between the sterilizers 2 in the body 3, but also permeates through the adsorbent 1 containing metal ions and removes the metals in the adsorbent 1. It is better to ensure that ions are sufficiently eluted.

(Effects of the Invention) The rot prevention method of the present invention uses a bactericidal metal as an adsorbent.
Since it is used after ion exchange, it has various effects such as the following.

(1) The antibacterial and bacteriostatic effects of the metal not only sterilize bacteria in the liquid, but also suppress the proliferation of various bacteria, thereby suppressing and preventing spoilage of the liquid.

(2) Compared to the case where metals with sterilizing power are used as they are without being ionized, the sterilization effect is maintained for a long time because the metal ions are stably eluted in minute amounts over a long period of time.

(3) Because the effectiveness of the metal ions in the vessel body 3 lasts for a long time,
There is no need to frequently replace the adsorbent 1 on which metal ions are adsorbed, which facilitates maintenance.

(4) As shown in FIG. 1, if liquid is stored in the storage tank 10 and the liquid volume is automatically controlled by the liquid volume controller 12, the management of the liquid volume in the storage tank IO will be automated, so maintenance becomes easier.

(5) If zeolite or activated carbon is used as the adsorbent 1, it will be a combination of a metal with sterilizing ability and an inorganic adsorbent, so it will be much less toxic than when an organic sterilizer is used.

(6) Since the method of the present invention can be installed off-line in tanks, machine tools, pools, etc., it can be easily installed on conventional equipment without special processing.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of an apparatus for implementing the present invention;
Fig. 2 is a cross-sectional view of an example of a vessel used in the method of the present invention, Fig. 3 is a block explanatory diagram showing another example of the present invention, and Fig. 4 is another example of a device implementing the method of the present invention. An explanatory diagram showing
FIG. 5 is an explanatory diagram of a conventional example showing the relationship between a machine tool and a tank. ■ is an adsorbent 2 is a disinfectant 3 is a container 6 is a water-soluble working oil 7 is a tank procedure amendment document August 21, 1985 1 Indication of the case Japanese Patent Application No. 1989-194993 2
Title of the invention Method for preventing spoilage of liquids such as water-soluble working oil and water 3 Relationship with the case of the person making the amendment Patent applicant address name Keiyo Co., Ltd. 4 Agent 〒loI location O3-866-3327
5 Date of amendment order Voluntary 6 Subject of amendment Full text of the specification, mouth (di/times →
347 Contents of the amendment Specification as shown in the attached sheet, Book 1, Title of the invention Water-soluble working oil, method for preventing spoilage of liquids such as water 2, Claims Made by ion-exchanging a sterilizing metal with an adsorbent. A sterilizing agent is stored in a container body, and a liquid such as water-soluble working oil or water is passed through the container body to elute metal ions from the sterilizing agent into the liquid. E21 A method for preventing spoilage of liquids such as water-soluble working oil and water, characterized by causing J to flow out. 3. Detailed description of the invention (industrial application field) The corrosion prevention method of the present invention is applicable to water-soluble working oil used for cooling and lubrication of grinding machines, numerically controlled machine tools, etc., and used for rolling equipment in steel plants. It is used to prevent spoilage of various liquids used in various fields such as rolling oil, cooling water used in cooling towers, water used in fish farms, goldfish tanks, etc., and pool water. . (Prior art) Among the liquids used in various fields, water-soluble machine oil used for cooling and lubricating machine tools, for example, is pumped up from tank A by pump P as shown in Figure 5, and is used for machine tools. It is sprayed onto the B blade and used for cooling, lubrication, cutting, washing away polishing powder, etc. If water-soluble machine oil is used for a long period of time, the oil may become contaminated, microorganisms in the pond may rot and produce a bad odor, and the oil may become acidic due to a drop in pH, causing corrosion of machine tools and workpieces.
The appearance of the oil may change (emulsion breakage, separation of oil and water, turbidity of the liquid, blackening, etc.), rust may occur, or the tank A or The filter, separator, etc. of the pump P may become clogged, or the pipes may become clogged due to slime φ molding. As a result, its properties as a working oil deteriorate and it becomes unusable, causing the hassle of having to replace the water-soluble working oil every short period of time (usually it begins to rot after about 14 days). However, in order to replace water-soluble machine oil, the machine must be stopped, flushed, and sterilized, so it takes time to start operating the machine after replacing it. There is also the problem that it costs a lot of money to replace the oil, and furthermore, it costs money to dispose of the waste liquid. Conventionally, the following measures have been taken to address these issues. When diluting the stock solution, use sterilized tap water to prolong the period until it spoils, lower the dilution rate (increase the concentration of the diluted solution), or use a commercially available preservative. to make it last longer. A large-capacity liquid tank will be installed, and each machine in the factory will be connected to it via piping, and the progress of spoilage will be suppressed by centrally controlling and preventing liquid stagnation. (Problems to be solved by the invention) However, each of the conventional methods has the following problems. The method of using sterilized tap water to dilute the stock solution has an initial effect, but long-term effects cannot be expected, and it is uneconomical if used at a low dilution rate. The method of using a commercially available preservative has the trouble of having to periodically replenish the preservative. When using a large-capacity liquid tank, not only does it require a huge amount of equipment, but also the piping etc. become clogged over time, making it impossible to achieve sufficient effectiveness over a long period of time. Not utilized. (Means for Solving the Problems) The purpose of the present invention is to solve the above problems by using ionized metals with bactericidal properties, and by eluting these metal ions into a liquid in appropriate amounts. The purpose is to stably supply a sterilizing solution and to prevent spoilage continuously over a long period of time. In the rot prevention method of the present invention, a sterilizing metal is added to an adsorbent 1.
A disinfectant 2 obtained by ion-exchanging is stored in a container 3,
The metal ions from the disinfectant 2 are eluted into the liquid 4 by passing a liquid 4 such as water-soluble working oil or water into the container 3, and the sterilizing liquid 5 in which the metal ions have been eluted is spilled into the liquid 6 to be prevented from rotting. It was designed so that Bactericidal agent 2 uses bactericidal metals such as silver and copper with zeolite,
Perform ion exchange using an adsorbent such as activated carbon. This is stored in a cylindrical container 3 as shown in FIG. 2, or in other appropriately shaped containers, bags, or the like. Zeolite is used as the adsorbent 1, silver is used as the bactericidal metal, and various methods can be considered for ion-exchanging the silver into the adsorbent 1. For example, the following method may be used. A suitably diluted silver nitrate solution is heated, and Zeotite is immersed and stirred in it to ion exchange the sodium and silver in the zeolite. In this case, the zeolite may be, for example, a powder or a
Make it into a spherical shape of about 5 mm and swell it. Moreover, it is best to use powdered powder. (Example) As an example of the present invention, what is shown in FIG. 1 is a case where the liquid 6 for preventing spoilage is water-soluble working oil. In FIG. 1, 7 is a tank, 6 is a water-soluble working oil, 9 is a pump for pumping up the water-soluble working oil, and IO is a storage tank for storing the pumped water-soluble working oil 6. In the storage tank 10, there are provided a sedimentation part 11, a liquid amount controller 12, and a container body 3 in which a disinfectant 2 is stored. The settling section 11 is for precipitating foreign matter mixed into the water-soluble working oil 6 being pumped up, and includes overflow partition plates 13a, 13b and underflow partition plate 13c.
is provided. The oil amount controller 1.2 has an upper limit switch 14a for detecting the upper limit of the liquid level and a lower limit switch 14b for detecting the lower limit of the liquid level, which are attached to the shaft 15. Among these, upper limit switch 14
a is turned on when the movable element 16a that moves up and down along the axis 15 rises and presses it, and the lower limit switch 14b is turned on when the mover 16b that moves up and down along the axis 15 descends and presses it. . The respective switches 14a and L4b are connected to the pump 9, and when the upper limit switch 14a is turned on, the pump 9 is stopped and pumping of the water-soluble working oil 6 from the tank 7 is stopped, and the lower limit switch 14b is turned on. Then, the pump 9 operates and the water-soluble working oil 6 is pumped up from the tank 7. Note that 16 in FIG. 1 is an electric control unit, and 17 is a pump that pumps up the water-soluble working oil 6 in the tank 7 and supplies it to the workpiece. (Operation of the embodiment) The water-soluble working oil 6 pumped up by the pump 9 from the tank 7 shown in FIG.
overflows, underflows through the partition plate 13b, overflows through the partition plate 13c, and reaches the storage section 18 of the storage tank 10. Impurities such as abrasive powder and cutting chips mixed in the water-soluble working oil 6 are precipitated in the oil in the settling section 11 during repeated overflow and underflow. The amount of water-soluble working oil 6a in the storage section 18 is controlled by the oil amount controller 12.
controlled by When the oil amount increases and the liquid level rises, the upper limit switch 14a is turned on and the pump 9 stops pumping up the oil. When the oil amount decreases and the liquid level falls, the lower limit switch 14b is turned on and the pump 9 stops pumping up the oil. Pumping of oil will begin. By repeating this process, the amount of oil in the reservoir 18 is set between the upper limit switch 14a and the lower limit switch 14b. The water-soluble working oil 6a in the reservoir 18 passes through the container body 3. In this case, the water-soluble working oil 6a passing through the vessel body 3 comes into contact with the disinfectant 2 therein, and the metal ions adsorbed on the adsorbent 1 are eluted into the water-soluble working oil 6a in very small amounts in units of PPb. be done. The water-soluble working oil 5 from which metal ions have been eluted is the container body 3
is dripped into the tank 7 from the outlet 20 of the tank 7. (Other Examples) In the one shown in FIG. 1, the water-soluble working oil 6 in the tank 7 is stored using the pump 9 #P! It is supposed to be pumped within 10 minutes, but
The method of supplying liquid into the storage tank 10 is not limited to the method shown in FIG. 1, but may also be performed as shown in FIGS. 3 and 4, for example. The one shown in Fig. 3 does not use the pump 9 to pump up the water-soluble working oil 6 in the tank 7 to the storage tank IO, but uses a pump 17 to pump up the water-soluble working oil 6 to the workpiece, etc. The water-soluble working oil 6 that has been raised and pumped up is branched into a branch path 21, and the branched water-soluble working oil is supplied into the vessel body 3 through the mensch filter 22 and the flow rate adjustment valve 23, and The sterilizing liquid flowing out from the outlet 20 is dripped into the water-soluble working oil 6 of the tank 7. In this embodiment, the mesh filter 22 shown in FIG. 4 is used in place of the sedimentation section 11 shown in FIG. 1, so that the apparatus can be made smaller. FIG. 4 shows a specific example of FIG. 3. In Fig. 4, 24 is a filter housing, 22 is a stainless steel mesh filter, 23 is a flow noise adjustment valve, 2
5 is a pedestal, and 3 is a container body. The above explanation specifically describes the case of water-soluble oil used for cooling and lubricating grinding machines, numerically controlled machine tools, etc., but the method of the present invention can be applied to, for example, rotting water in a fish tank. To prevent spoilage, the sterilizing liquid flowing out from the outlet 20 of the container body 3 may be dripped into the water in the fish tank, and to use it to prevent spoilage of water in the pool, the sterilizing liquid flowing out from the outlet 20 of the container body 3 may be dripped into the water in the fish tank. All you have to do is drop the sterilizing liquid that flows out into the water in the pool. Furthermore, when using in other fields, the container 3 containing the sterilizing agent 2 may be used depending on the purpose. No matter what field it is used in, disinfectants ・Agent 2
The container 3 that houses the container should not be placed in a stagnant liquid, but placed in a flowing liquid.
By passing water through the container 3, the water not only passes between the sterilizers 2 in the container 3, but also passes through contact with the adsorbent 1 that contains metal ions, thereby converting hydrogen ions and silver. The unique feature is that ions are exchanged little by little. (Effect of the invention) The rot prevention method of the present invention uses a bactericidal metal as an adsorbent.
Since it is used after ion exchange, it has various effects such as the following. (1) The antibacterial and bacteriostatic effects of metals not only sterilize bacteria in the liquid, but also inhibit the proliferation of various bacteria, thereby suppressing and preventing spoilage of the liquid. (2) Compared to the case where metals with sterilizing power are used as they are without being ionized, the sterilization effect is maintained for a long time because the metal ions are stably eluted in minute amounts over a long period of time. (3) Because the effectiveness of the metal ions in the vessel body 3 lasts for a long time,
There is no need to frequently replace the adsorbent 1 on which metal ions are adsorbed, which facilitates maintenance. (4) As shown in FIG. 1, if liquid is stored in the storage tank 10 and the liquid volume is automatically controlled by the liquid volume controller 12, the management of the liquid volume in the storage tank 10 is automated, so maintenance is possible. becomes easier. (5) If zeolite, activated carbon, etc. are used as the adsorbent l, it will be a combination of a metal with sterilizing ability and an inorganic adsorbent, so it will be much less toxic than when using an organic sterilant. (6) Since the method of the present invention can be installed off-line in tanks, machine tools, pools, etc., it can be easily installed on conventional equipment without special processing. 4. Brief description of the drawings FIG. 1 is an explanatory diagram showing an example of an apparatus for implementing the present invention;
Fig. 2 is a cross-sectional view of an example of a vessel used in the method of the present invention, Fig. 3 is a block explanatory diagram showing another example of the present invention, and Fig. 4 is another example of a device implementing the method of the present invention. An explanatory diagram showing
FIG. 5 is an explanatory diagram of a conventional example showing the relationship between a machine tool and a tank. 1 is an adsorbent 2 is a disinfectant 3 is a container 6 is a water-soluble working oil 7 is a tank

Claims (1)

[Claims] A sterilizing agent made by ion-exchanging a sterilizing metal with an adsorbent is stored in a container, and a liquid such as water-soluble working oil or water is passed through the container, and metal ions are eluted from the sterilizing agent into the liquid. A method for preventing spoilage of liquids such as water-soluble working oil and water, characterized in that a sterilizing solution in which ions have been eluted is made to flow into a liquid for preventing spoilage.