JPH0557117A - Regeneration of compressed air filter - Google Patents

Abstract

PURPOSE:To regenerate a filter without damaging the same by spraying high pressure steam of definite temp. or higher or alkali degreasing solution- containing high pressure air of definite temp. or higher to the filter for compressed air clogged with oils and fats. CONSTITUTION:A ceramic filter 3 used in an oil recovery device 3 to generate clogging by oils and fats is connected to a steam pipe 5 to allow steam 6 to flow to the filter 3 under high pressure. At this time, as this steam, high pressure air of 90 deg.C or high or high pressure air of 90 deg.C or higher containing an alkali degreasing solution is used. Whereupon, an oil component 7 is melted from the surface of the filter 3 to be flown. By this method, a heat shock is relaxed and the filter can be regenerated without being damaged or deformed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for regenerating a filter for removing oil and fat contained in compressed air.

[0002]

2. Description of the Related Art Compressed air is the mainstream of the air source in factories used for the operation of machinery and the cleaning of parts, and it is necessary to remove the oil and fat contained in the compressed air in order to enhance its use effect. is there. A filter is usually used for removing oil and fat. Filters that have clogged up have traditionally been reconditioned by a filter manufacturer. FIG. 4 is a conceptual diagram for explaining the reproducing method. Most of the clogging components of the filter are fats and oils, and they are in a solidified state. Therefore, a filter with clogging was placed on the hearth of the heating furnace, and heated to about 300 to 400 ° C. with a heater to incinerate the oil and fat.

[0003]

However, in this method, there is a risk that the filter may be damaged or deformed due to thermal shock, and the regeneration equipment is limited. Therefore, it is necessary to request a specialist to solve the problem. was there. Therefore, the present invention is intended to solve the above-mentioned problems and provide a method for regenerating a filter that can regenerate the filter using a familiar high-pressure fluid without damaging the filter.

[0004]

The present invention relates to a method for regenerating a filter for compressed air that is clogged with fats and oils, etc., in which high-pressure steam containing 90 ° C. or higher or high-pressure air containing alkali degreasing liquid of 90 ° C. or higher is used. Is a method for regenerating a filter for compressed air.

[0005]

The present invention differs from the conventional incineration regeneration method in that the oil and fat adhering to the filter is remelted by heating at a temperature below the flash point, and is blown off from the filter eye with a high pressure fluid to regenerate the filter. Is the way. The high-pressure fluid used here has a temperature (90 ° C. or higher) at which the solidified fat and oil is remelted, and can overcome the adhesive force to the filter to blow off the fat and oil (1 to 6 kg / If it is cm ² ), its type does not matter.
Specifically, steam having a temperature of 90 ° C. or higher can be used, and it is preferable to use high-pressure air containing an alkaline degreasing liquid having a temperature of 90 ° C. or higher for a filter that is firmly attached.

[0006]

Embodiments of the present invention will be described with reference to FIGS. FIG. 1 is an overall view of an oil recovery device. The compressed air 1 containing oil and fat is introduced into the oil recovery unit, and most of the oil and fat is dropped and collected in the oil reservoir 2. Then, it is filtered by the ceramic filter 3 to completely remove oil and fat, and the clean compressed air 4 is discharged. The filter thus used for purification of the compressed air for a certain period is regenerated by the apparatus of FIG. 2 or 3. In FIG. 2, the ceramic filter 3 is connected to the steam pipe (steam pipe) 5 and the steam 6 is caused to flow at a high pressure so that oil 7
Is melted, blown away and regenerated. In FIG. 3, the heated alkaline cleaning liquid 9 is contained in the tank 8 and the used ceramic filter 3 is immersed therein. Alkaline cleaning solution 9
Is sucked up by the suction pump 10 and mixed with the high-pressure air 11, and is flown into the ceramic filter 3 to flow out the melted or eluted oil 7 and regenerate the filter 3.

[0007]

According to the present invention, by adopting the above-mentioned constitution, it is possible to relieve the thermal shock, avoid the damage and deformation of the filter, and regenerate the filter, and use a familiar vapor source. Where it can be recycled, it can be processed in the factory without the need for specialists, which also helps reduce recycling costs.

[Brief description of drawings]

FIG. 1 is an overall view of an oil recovery device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a pressurized steam regeneration method, which is the first embodiment of the filter regeneration method of the present invention.

FIG. 3 is an explanatory diagram of a pressurized alkaline cleaning regeneration method, which is a second embodiment of the filter regeneration method of the present invention.

FIG. 4 is an explanatory diagram of a conventional filter regeneration method by incineration.

Claims (1)

[Claims] 1. A method for regenerating a filter for compressed air that is clogged with oil and fats, characterized in that high-pressure steam at 90 ° C. or higher or high-pressure air containing an alkaline degreasing liquid at 90 ° C. or higher is blown. How to regenerate a compressed air filter.