JPH01299679A - Method for removing liquid material - Google Patents

Abstract

PURPOSE:To efficiently clean off a liq. material by injecting a cleaning soln. onto the material from a small hole provided to the device and communicating with the outside. CONSTITUTION:When a device as the sand mill part having a screen 10, a check valve 12, a valve, a pump, etc., is cleaned, a cleaning soln. is sent to a hose 22 from the pump, passed through the small hole 24, and injected into the screen. Consequently, a liq. material deposited on a limited part is removed. An org. solvent, water, acid, alkali, etc., can be used as the cleaning soln. By this method, the device is efficiently cleaned.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a method for easily removing and removing liquid substances that adhere to complex-shaped parts or narrow parts inside equipment without disassembling the equipment.
Concerning how it can be washed.゛[Prior art and problems] Mixing liquid materials such as paints, inks, coloring materials such as pigment slurry or pigment paste, or synthetic resin varnishes, etc.
In order to remove liquid substances that have adhered to complex-shaped parts or small parts that become blind spots inside the equipment used for stirring, dispersing, transporting, or measuring the properties of these liquid materials, (a) Apply cleaning liquid to the equipment. (b) A method in which a spherical body with a diameter of approximately 50 m+s or more, such as a rotary spray device fixed to the equipment, is rotated. There are methods such as blowing out the cleaning liquid, but with these conventional methods, in (a), it is difficult to bring the cleaning liquid into contact with the liquid in a turbulent state, and it is necessary to use a large amount of cleaning liquid for a long time to perform sufficient cleaning. (b) Odors have problems such as not being able to enter complex shaped parts and narrow parts that become blind spots, making them unusable. Usually, it is necessary to disassemble the equipment and remove the attached liquid. Cleaning is in progress.

The method of disassembling and cleaning equipment requires a long time to disassemble and reassemble the equipment, and when an organic solvent is used as a cleaning liquid, there are health and safety problems due to solvent scattering, such as odor.

Furthermore, in cases where the local area has a complicated shape or is too narrow to be decomposed, the method (a) above is generally used to remove the liquid material adhering to the area. As mentioned above, removing the liquid requires a long time and a large amount of cleaning solution.

In particular, in the production and use of coloring materials such as paints, inks, and pigment slurries, there are many changes in product types and colors.
If liquid (residue) adhering to parts of complex structures such as sand mill screens and check valves that are often used to manufacture these coloring materials gets mixed into the next manufactured product, it may affect the quality of the product, such as affecting the color. This may result in physical defects.

In the field of paints, the proportion of carbon black that is allowed to be mixed within titanium white, which is widely used as a white pigment in coatings to maintain a color difference (△E) of -0.3, is approximately 5 p.
pm or less. Therefore, the permissible amount of carbon black mixed in per batch of titanium white is approximately 5 g or less, and even a small amount of liquid that adheres to complex-shaped parts or small parts and remains without being removed. I can't neglect it.

[Means for Solving the Problems] The present inventor has proposed a method that does not have the above-mentioned conventional problems and can easily clean liquid substances adhering to complex-shaped parts inside equipment or narrow parts that become blind spots. As a result of various studies, we decided to form a small hole or narrow slit in the device,
By spraying the cleaning liquid onto the liquid matter adhering to parts with complicated shapes or narrow areas that become blind spots, the liquid matter can be easily removed in a short time and with a small amount of cleaning fluid without disassembling the equipment. found that safety and health problems could be solved.

That is, the present invention is a method for removing liquid matter adhering to a complicatedly shaped part or a narrow part that becomes a blind spot inside a device, and the method involves introducing a cleaning liquid through a small hole formed in the device and communicating with the outside. The present invention relates to a method for removing a liquid material, which comprises spraying onto the liquid material.

In the present invention, "equipment" refers to mixing, stirring, and
Refers to devices whose interiors come into contact with liquids, such as equipment for dispersing, transporting, or measuring the properties of liquids, and parts connected to these devices whose interiors come into contact with liquids. Typical examples include sand mills, valves, pumps, piping, and parts connected thereto.

The above-mentioned equipment has complex-shaped parts or narrow parts that become blind spots that cannot be easily cleaned using the methods (a) and (b) above, and liquid substances adhering to these parts can be removed. The present invention provides a method for easily removing.

In this specification, local means [a complex-shaped part or a narrow part that becomes a blind spot], and because these have a complicated shape or a narrow part that becomes a blind spot, (
This refers to the inside of the equipment that cannot be easily cleaned using methods a) and (b), and generally has a gap of 2 m.
It means a place with a complex shape of 100 mm or more and 100 mm or more.

The liquid substances to be removed include liquid substances such as paints, inks, pigments, pastes, pigment slurries, and varnishes, as well as solidified substances of these liquid substances. Not only for low viscosity liquids, but also for conventional (a) and (b)
) is particularly difficult to remove. The method of the present invention is particularly effective for highly viscous to solidified liquids.

In the method of the present invention, in order to remove the locally adhered liquid, a cleaning liquid is injected onto the liquid from a small hole formed in the device and communicating with the outside.

It is preferable that the small hole be located on a wall surface where the cleaning liquid can be directly sprayed onto the locally adhered liquid, but it may also be located at a position where the cleaning liquid hits the localized area after hitting the wall or the like. The distance from the localization to the ostium is generally within about 100 m+m.

In addition, when the cross section of the small hole is approximately circular, it is desirable that the maximum diameter is 2 mm or less, and when the cross section is approximately rectangular, that is, in the case of a slit, the maximum width is 2 mm or less.
It is desirable that it be 111 or less. When the diameter of the small hole or the width of the slit exceeds 2ffII11, problems arise such as the pressure of the cleaning liquid decreases, resulting in a decrease in cleaning ability, and the need for a large amount of cleaning liquid.

Also, the small hole in the present invention may be a small hole to which a nozzle is attached; for example, a hole may be cut in a wall surface through which the cleaning liquid can be directly sprayed onto attached liquid matter, and the nozzle may be screwed into the hole. It can be a small hole with a nozzle attached. By attaching a nozzle, a desired spray pattern can be achieved, and more efficient cleaning, that is, removal of locally attached liquid matter with a smaller amount of cleaning liquid and in a shorter time, can be achieved.

In the present invention, in order to inject the cleaning liquid from the small hole, it is necessary to connect the small hole and a pump for feeding the cleaning liquid to piping such as a hose or a vibrator. Furthermore, when the device is in use, it is necessary to prevent the contents inside the device from flowing out through the small hole to the outside or into the piping connected to the pump. To do this, a check valve is screwed in to cover a small hole or slit on the outer surface of the wall, so that the contents will not flow out when the equipment is in use, but at the same time, the cleaning liquid from the pump can be sprayed during cleaning. It is preferable to do so. Alternatively, simply attach a short tube to the outside of the device by welding or screwing it so as to cover a small hole, and when using the device, cover the tip of the tube with a cap to prevent the contents from coming out, and when cleaning the tube, It is also possible to connect piping from a pump to the tip and spray cleaning liquid. The point is that the contents of the device do not flow out when the device is in use, and cleaning liquid can be sprayed from the small holes during cleaning.

[Example] Screen 10 of sand mill parts (Figures 1 and 2)
, also the reverse valve 12 (Figs. 1 and 3), valve 14
(Fig. 4), the pump 16 (Fig. 5), and the piping 18 (Fig. 6) with measuring instruments attached, there are places where attached liquid cannot be easily removed using conventional methods. be. In order to make it easier to clean, it may be possible to have a structure without localization, but this has a limit due to the performance of the device.

According to the present invention, the cleaning liquid is sprayed onto the adhered liquid material. The cleaning liquid used in the present invention may be any cleaning liquid that can remove adhering liquid materials by dissolving, decomposing, etc., and organic solvents, water, cleaning agents, acids, alkalis, etc. can be used as appropriate.

A method for removing localized liquid matter from the screen IO of sand mill parts will be explained based on FIG. 2.

Figure 2 shows the state in which the liquid substance 20 remaining locally inside the screen O, which is the sand mill part, is removed after the sand mill and its parts have been cleaned by the method (a) above. The cleaning liquid sent to the hose 22 passes through the small holes 24 and is sprayed inside the screen, removing liquid substances adhering to private parts.

Here, set the pressure of the cleaning liquid injected from the small hole to 0°1~4.
kg/cra”, preferably 0.2 to 1 kg/
By setting cII+1, it was possible to easily remove the liquid substance adhering to the local area. Check valve 12 in the above case and shown in FIG. Valve 14 shown in FIG. Fifth
In both cases of the pump 16 shown in the figure and the piping 18 to which the temperature sensor 28 shown in FIG. 6 was attached, the localized liquid could be removed within one minute.

In the illustrated embodiment, cleaning fluid is delivered to the stoma 24 via the hose 22. Alternatively, as described above, a check valve can be attached to a relatively large hole by screwing or the like, and the central hole of the check valve can be used as a small hole through which the cleaning liquid is spouted.

The method of the present invention is effective in areas other than local areas (a) and (b).
) may be performed at the same time, before or after the method, and by using it in conjunction with the conventional methods (a) and (b), it is possible to efficiently remove liquid substances that have adhered to the inside of the device. can.

As described above, according to the method of the present invention, a cleaning liquid is sprayed locally. The cleaning solution hits the area and returns to remove the fluid.

[Effects] The method of the present invention enables efficient cleaning by spraying a cleaning liquid from small holes formed in the equipment, and can be applied to various equipment relatively easily.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a sand mill and its parts, and FIG. 2 is a sectional view of a screen, which is a part of the sand mill, showing a state in which liquid material is removed by the method of the present invention. Fig. 3 is a cross-sectional view of a check valve, which is a sand mill part, Fig. 4 is a valve, Fig. 5 is a pump, and Fig. 6 is a cross-sectional view of a pipe to which a temperature sensor is attached. Indicates the condition to be removed. lO... Screen, 12... Check valve, 14...
Valve, 16...Pump, 18...Piping, 20...
・Liquid, 24...Small pores. Fig. 2 Fig. 3 Shin-ohshaku

Claims (1)

[Claims] 1. A method for removing a liquid substance adhering locally inside a device, characterized by spraying a cleaning liquid onto the liquid substance from a small hole formed in the device and communicating with the outside. A method for removing liquid substances. 2. The removal method according to claim 1, wherein the local area inside the equipment is a check valve or screen of a sand mill part. 3. The removal method according to claim 1, wherein the device is a valve. 4. The removal method according to claim 1, wherein the device is a pump.