KR20090060856A - Purification system of waste oil and method thereof - Google Patents

Abstract

A waste lubricant recycling system and a waste lubricant recycling method using the same are provided to improve the water-removing ability by continuously maintaining a vacuum condition in the upper vacuum chamber for spraying lubricant flown in the vacuum chamber to separate water from the lubricant. A waste lubricant recycling system comprises: an oil suction motor(20) sucking waste lubricant through an oil inlet(10); a heater(40) receiving waste lubricant or lubricant from the oil suction motor or oil discharging/supplying motor to heat the waste lubricant or lubricant to a predetermined temperature; a vacuum chamber(50) including an upper vacuum chamber(51) and a lower vacuum chamber(52) to always constantly maintain the degree of vacuum of the upper vacuum chamber; an oil discharging/supplying motor(60) discharging lubricant stored in the second storage tank to an oil outlet(70) or supplying the lubricant to the heater; and a water condenser(80) converting vaporized water received from the upper vacuum chamber into water to discharge the water. The upper vacuum chamber separates lubricant and water from the heated waste lubricant by one or more spray nozzles(53). The lower vacuum chamber includes a first storage tank(52a) and a second storage tank(52b).

Description

Waste Lubricant Regeneration System and its Method {PURIFICATION SYSTEM OF WASTE OIL AND METHOD THEREOF}

The present invention relates to a waste lubricating oil regeneration system and a method thereof, and more particularly, to a waste lubricating oil regeneration system and a method for purifying the waste lubricating oil and reusing the waste lubricating oil to reduce the occurrence of waste lubricating oil and thus making the lubricant available for a long time.

In general, lubricating oils that are widely used in various machine tools, hydraulic machines, automobile engines, general industries, etc., promote the failure and deterioration of machines due to the mixing of moisture and the mixing of particulate contaminants.

Moisture in lubricating oil is the most common contaminant in lubricating systems and has a wide variety of effects such as corrosion of the device, reduction of lubrication properties, fluid breakage, additive collection, reduction of dielectric strength, wear of hydraulic products and oxidation of lubricant.

Therefore, in order to increase the service life of the machine and maintain the normal operating state, the lubricating oil in use should be replaced regularly according to the degree of water pollution, and the large amount of waste lubricating oil generated at this time is the main culprit of environmental pollution.

Conventional waste lubricating oil regeneration techniques vary greatly depending on the type of lubricating oil and the purpose of regeneration. In general, the most commonly used method is to recycle waste lubricating oil by centrifugal force filtration chemical treatment and use it as fuel oil.

On the other hand, conventionally, a method of purifying the waste lubricating oil by removing water and the like contained in the waste lubricating oil and using the method of heating the reduced lubricating oil under reduced pressure. However, this type of method is mostly used by simple evaporation because there is no consideration of the shape of the spray nozzle, the operation safety of the device and the continuous processability under reduced pressure, and the operation characteristics of the device, the processing capacity per unit time, and the waste lubricant In practice, there is a problem in that the purification performance of the waste lubricating oil is reduced.

To this end, the following techniques have been proposed in the past.

1) Korea Patent Registration No. 10-0407161 (hereinafter referred to as 'Prior Technology 1')

Prior art 1 (FIG. 1) relates to an apparatus and method for removing water contained in waste lubricant oil, the apparatus comprising: an oil storage tank 80 in which waste lubricant oil is stored; An evaporation chamber 40 through which the internal pressure is vacuumed through the condensate tank and the condenser according to the operation of the vacuum pump 10 ; A heating device (80a) for heating the waste lubricating oil discharged from the oil storage tank; An injection nozzle (44) installed in the evaporation chamber and connected to an outlet of the heating device to eject waste lubricating oil heated by an internal vacuum pressure; By detecting the waste lubricating oil in the evaporation chamber using a position sensor to control the discharge and storage, and by detecting the waste lubricating oil in the discharge chamber 50 for temporarily storing the waste lubricating oil to be discharged , Discharge means for discharging the waste lubricating oil in the state; An oil pump (60) operated by said discharge means to discharge oil from said discharge chamber; It is composed of an oil tank for recovering waste lubricant oil from which water is removed by the oil pump.

2) Korean Patent Registration No. 10-0407159 (hereinafter referred to as 'Prior Technology 2')

Prior art 2 (FIGS. 1 and 2) relates to a waste lubricating oil purifying apparatus and method thereof, the apparatus comprising: an oil storage tank 80 in which waste lubricating oil is stored; An evaporation chamber 40 through which the internal pressure is vacuumed through the condensate tank and the condenser according to the operation of the vacuum pump 10 ; A heating device (80a) for heating the waste lubricating oil discharged from the oil storage tank; An injection nozzle (44) installed in the evaporation chamber and connected to an outlet of the heating device to eject waste lubricating oil heated by an internal vacuum pressure; The waste lubricating oil in the evaporation chamber is sensed using a position sensor to control discharge and storage, and the waste lubricating oil is ejected from the injection nozzle by sensing the waste lubricating oil in the discharge chamber 50 for temporarily storing the waste lubricating oil to be discharged. Discharge means for discharging the waste lubricating oil in the state; An oil pump (60) operated by said discharge means to discharge oil from said discharge chamber; An electrostatic separator 70 in which particulate contaminants are charged by a corona discharge on a path through which the oil pumped by the oil pump passes, and an electrode and a collecting filter 73 for collecting charged particulate contamination condensation water are provided; ; A high voltage generator (74) for applying a high voltage to the electrode; The oil tank for recovering the waste lubricating oil from which particulate contaminants are removed in the electrostatic separator.

The operation of the prior arts 1 and 2 having the above configuration is as follows.

First, the solenoid valve S1 is opened, the solenoid valve S2, the solenoid valve S3, and the valve V1 are closed, and when the vacuum pump 10 is operated, an evaporation chamber connected by the condensation pipe 102 is formed. 40, the pressure in the condenser 30, the condensate tank 20 and the discharge chamber 50 is lowered to a vacuum pressure state, and stored in the oil storage tank 80 by the vacuum pressure in the evaporation chamber 40. The waste lubricating oil is sucked through the supply pipe 101 and is injected into the vaporization chamber 40 through the injection nozzle 44 installed at the end of the supply pipe 101. At this time, the waste lubricating oil injected into the evaporation chamber 40 is injected in a heated state while passing through the heating device 80a installed in the supply line 101. When the waste lubricating oil is injected into the evaporation chamber 40 through the nozzle 44, the moisture contained in the waste lubricating oil is evaporated when it is adjusted to the saturated steam temperature of water vapor corresponding to the vacuum pressure inside the evaporating chamber 40. . The evaporated water is introduced into the condenser 30 through the condenser tube 102 by the vacuum pressure toward the vacuum pump 10, and the water is condensed while being passed through the condenser 30 and stored in the condensate tank 20. .

The condensate stored in the condensate tank 20 is transferred to the auxiliary condensate tank 20a installed at the lower end by opening the valve V1 installed in the condensate discharge line 107, and then the valve V1 is closed and the valve V2 is closed. ) To drain the condensate to the outside.

When the amount of waste lubricating oil injected into the evaporation chamber 40 reaches a certain amount, the waste lubricating oil of the discharging chamber 50 is transferred by the operation of the discharging means, and the amount of waste lubricating oil introduced into the discharging chamber 50 is constant. When abnormal, the waste lubricating oil from which water is removed by the discharge means is moved to the oil storage tank (80).

However, the prior arts 1 and 2 having such a configuration have the following problems.

First, there is a problem that the injection nozzle 44 is clogged or the purification ability of the waste lubricant is lowered by directly injecting into the evaporation chamber 40 without removing foreign matters contained in the contaminated waste lubricant. In addition, even if the particles contained in the contaminated waste lubricating oil using the filter has a function of removing large foreign substances, there is a disadvantage that the machine must be stopped to replace the filter when the filter is clogged.

Second, since the lubricating oil is sucked into the evaporation chamber 40 by one vacuum pump 10, the amount of lubricating oil is injected through the injection nozzle 44 and there is a problem that the spraying speed is also lowered.

Third, the lubricating oil collected in the evaporation chamber 40 is transferred to the discharge chamber 50 while the evaporation chamber 40 and the discharge chamber 50 are evacuated by one vacuum pump 10. Therefore, when lubricating oil transferred to the discharge chamber 50 is discharged out, the solenoid valves S1 and S2 connected between the evaporation chamber 40 and the discharge chamber 50 are locked and the vacuum of the discharge chamber 50 is reduced. Drain while purging. In this case, in order to move the lubricating oil in the evaporation chamber 40 to the discharge chamber 50 while the vacuum of the discharge chamber 50 is purged, the closed solenoid valves S1 and S2 should be opened. As the vacuum (atmospheric pressure) is moved into the evaporation chamber 40, the phenomenon that the degree of vacuum in the evaporation chamber 40 falls is generated. As a result of this phenomenon, the amount of lubricating oil sucked into the evaporation chamber 40 is reduced, and the vaporization phenomenon of water is remarkably decreased, and thus the water removal ability is remarkably decreased.

Fourth, when opening the valve (V1) to discharge the condensate stored in the condensate tank 20 to the auxiliary condensate tank (20a), the condensate tank 20, the condenser 30 and the evaporation chamber 40 The internal vacuum state changes to atmospheric pressure or the vacuum level drops. As described above, as described above, the amount of lubricating oil sucked into the evaporation chamber 40 decreases, and the vaporization phenomenon of water decreases significantly.

Accordingly, the present invention has been made to solve the above problems, the first object of the present invention is to produce a vacuum chamber with a double structure of the upper and lower, injecting the lubricating oil flowing into the vacuum chamber to separate the lubricating oil and water Disclosed is a waste lubricating oil regeneration system and a method for improving water removal capability by continuously maintaining a vacuum state in an upper vacuum chamber.

The second object of the present invention is to improve the purification ability of the waste lubricating oil by making a plurality of primary filters for the primary purification of contaminated lubricating oil and converting them to the next filter when the filter is blocked by foreign substances. Disclosed is a waste lubricating oil regeneration system and a method for easily replacing and cleaning a clogged filter during operation.

The third object of the present invention is to use a vacuum pump for supplying lubricating oil to the vacuum chamber and sucking the lubricating oil, using two of the existing ones. And a method thereof.

It is a fourth object of the present invention to provide a waste lubricating oil regeneration system and a method for improving water removal ability by using two or two conventional vacuum pumps for maintaining a vacuum in a vacuum chamber.

It is a fifth object of the present invention to provide a waste lubricating oil regeneration system and method for improving the purification ability of dissolved water, contaminants, and the like dissolved in the lubricating oil.

Waste lubricant regeneration system according to the present invention for achieving the above object, the oil suction motor 20 for sucking the waste lubricant through the oil inlet (10); A heater 40 which receives waste lubricating oil or lubricating oil from the oil suction motor 20 or the oil discharge and supply motor 60 and heats them to a predetermined temperature; An upper vacuum chamber 51 for separating lubricating oil and water by one or more injection nozzles 53 supplied with the waste lubricating oil heated from the heater 40 and injecting in a vacuum state, and the upper vacuum chamber 51; The first storage tank 52a for receiving and storing lubricating oil from the upper vacuum chamber 51 and the valve connected between the upper vacuum chamber 51 and the first storage tank 52a in the same degree of vacuum are closed. Has a lower vacuum chamber 52 composed of a second storage tank 52b for receiving and storing lubricating oil from the first storage tank 52a to maintain a constant vacuum degree of the upper vacuum chamber 51 at all times. A vacuum chamber 50; An oil discharge and supply motor 60 for discharging the lubricating oil stored in the second storage tank 52b to the oil discharge port 70 or supplying the heater 40 to the heater 40; And a water condenser 80 which cools the vaporized water supplied from the upper vacuum chamber 51 and converts the water vaporized into water to discharge the water.

The waste lubricating oil regeneration system includes a first condensate tank (110) for storing the condensate discharged from the water condenser (80); A first vacuum pump (90) for maintaining the upper vacuum chamber (51) in a vacuum state through the first condensate tank (110) and the water condenser (80); A second condensate tank (120) for receiving and storing condensate from the first condensate tank (110) under the same vacuum as the first condensate tank (110); A third condensate tank 130 for receiving and storing condensate from the second condensate tank 120 in a state in which a valve connected between the first condensate tank 110 and the second condensate tank 120 is closed; And a second vacuum pump 100 which maintains the lower vacuum chamber 52 and the second condensate tank 120 in a vacuum state.

The waste lubricating oil regeneration system has condensate stored in the first condensate tank 110 in a state where the vacuum of the first condensate tank 110 and the second condensate tank 120 are the same and the twelfth solenoid valve s12 is closed. An eleventh solenoid valve (s11) for discharging the gas to the second condensate tank (120); A twelfth solenoid valve s12 for discharging the condensed water stored in the second condensate tank 120 to the third condensate tank 130 while the eleventh solenoid valve s11 is closed; A tenth solenoid valve s10 configured to purge the vacuum of the first condensate tank 110 and the second condensate tank 120; And a thirteenth solenoid valve s13 for purging the vacuum of the second condensate tank 120.

The waste lubricating oil regeneration system includes a condensate discharge motor 140 for discharging the condensate stored in the third condensate tank 130 to the condensate outlet 160.

The waste lubricating oil regeneration system is installed between the condensate discharge motor 140 and the condensate outlet 160, a condensate filter 150 for removing foreign substances or oil components contained in the condensate; do.

The condensate filter 150 is characterized in that the first to N-th filter composed of a plurality of mesh, respectively.

The waste lubricating oil regeneration system is installed between the oil suction motor 20 and the heater 40, characterized in that further comprises a filter unit 30 for removing foreign matter contained in the waste lubricating oil.

The filter unit 30 is composed of first to Nth filters each composed of a plurality of meshes, and when the filter is blocked by foreign matter, the next filter is automatically switched to operate, so that the blocked filter can be replaced and cleaned during operation. It is characterized by that.

The waste lubricating oil regeneration system includes a first solenoid valve (s1) for opening and closing the waste lubricating oil supplied from the oil inlet (10) to the oil suction motor (20); A second solenoid valve (s2) for opening and closing the waste lubricant or lubricating oil supplied from the oil suction motor 20 or the oil discharge and supply motor 60 to the heater 40; And a third solenoid valve s3 for opening and closing the waste lubricating oil supplied from the heater 40 to the upper vacuum chamber 51.

The waste lubricating oil regeneration system includes the lubricant stored in the upper vacuum chamber 51 in a state where the fifth solenoid valve s5 is closed when the upper vacuum chamber 51 and the first storage tank 52a have the same degree of vacuum. A fourth solenoid valve s4 discharged to the first storage tank 52a; A fifth solenoid valve s5 for discharging lubricating oil stored in the first storage tank 52a to the second storage tank 52b while the fourth solenoid valve s4 is closed; When oil is discharged from the upper vacuum chamber 51 to the first storage tank 52a of the lower vacuum chamber 52, the pressure corresponding to the volume discharged into the first storage tank 52a is moved to the upper vacuum chamber. A sixth solenoid valve s6 for easily discharging; A seventh solenoid valve s7 for purging the vacuum of the first storage tank 52a; And an eighth solenoid valve s8 for purging the vacuum of the second storage tank 52b.

The waste lubricating oil regeneration system includes a ninth solenoid valve s9 for opening and closing the lubricating oil discharged from the oil discharge and supply motor 60 to the oil discharge port 70 or to be supplied to the heater 40. Characterized in that configured.

The heater is characterized in that to heat the waste lubricant to 40 ℃ to 70 ℃.

The at least one injection nozzle 53 is characterized in that the injection of the waste lubricant or lubricating oil while rotating.

The waste lubricating oil regeneration system is provided with a controller for controlling the operation of the first to thirteenth solenoid valves s1 to s13, respectively.

In addition, the waste lubricating oil regeneration method according to the present invention for achieving the above object comprises the steps of: (a) sucking the waste lubricating oil using an oil suction motor; (b) removing foreign matter contained in the inhaled waste lubricant through a filter; (c) receiving waste lubricant oil from the filter and heating it with a heater; (d) injecting the waste lubricating oil heated from the heater into the upper vacuum chamber through at least one injection nozzle to separate lubricant and water; (e) When the lubricating oil of the upper vacuum chamber reaches a certain level, the first storage of the lubricating oil separated from the upper vacuum chamber while the valve connected between the first storage tank and the second storage tank of the lower vacuum chamber is shut off. Discharging to the tank; (f) when the lubricating oil of the first storage tank reaches a certain level, the lubricant is discharged from the first storage tank to the second storage tank while the valve connected between the upper vacuum chamber and the first storage tank is shut off. Then re-forming the first storage tank in a vacuum state by using a second vacuum pump; (g) discharging the lubricating oil stored in the second storage tank to an oil outlet using an oil discharge and supply motor or supplying the lubricant to the upper vacuum chamber through the heater; And (h) converting the water separated from the upper vacuum chamber into water by cooling in a water condenser and then discharging the water.

The waste lubricating oil regeneration method may include storing condensate discharged from the water condenser in a first condensate tank; Discharging condensate from the first condensate tank to the second condensate tank when the water in the first condensate tank reaches a predetermined level, and shuts off a valve connected between the second condensate tank and the third condensate tank; And discharging the condensate from the second condensate tank to the third condensate tank in a state in which a valve connected between the first condensate tank and the second condensate tank is blocked when the water of the second condensate tank reaches a predetermined level. Reconstructing the second condensate tank in a vacuum state using a second vacuum pump; characterized in that it further comprises.

The waste lubricating oil regeneration method may be configured to vacuum the inside of the upper vacuum chamber through the first condensate tank and the water condenser by using a first vacuum pump, and the second condensate tank by using the second vacuum pump. The interior of the first storage tank is characterized in that the vacuum state.

The waste lubricating oil regeneration method is characterized in that for discharging the condensate stored in the third condensate pump through a condensate outlet using a condensate discharge motor.

The waste lubricating oil regeneration method is characterized in that when the condensate stored in the third condensate tank is discharged out to remove the foreign matter or oil contained in the condensate through a condensate filter.

The waste lubricating oil regeneration method removes the foreign matter contained in the waste lubricating oil using a plurality of filters, and when the filter is blocked by the foreign matter, the next filter is automatically switched to operate so that the blocked filter can be replaced and cleaned during operation. It is characterized by being.

According to the waste lubricating oil regeneration system and method thereof according to the present invention, a vacuum chamber is manufactured in a double structure of an upper vacuum chamber for separating lubricating oil and water, and a lower vacuum chamber for storing lubricating oil. Even when the lubricating oil is discharged into the vacuum chamber, the vacuum in the upper vacuum chamber can be maintained continuously, thereby improving the water removal capability.

In addition, by installing a plurality of primary filters of the triple structure made of the primary, secondary, and tertiary mesh, if the first filter is blocked by foreign matters, it automatically switches to the second filter, and when the second filter is blocked by foreign matters, By then automatically switching to the filter, there is an advantage to improve the purification ability of the waste lubricant and to easily replace and clean the filter clogged during operation.

In addition, according to the dual structure of the vacuum chamber, by supplying the lubricating oil to the vacuum chamber and using the vacuum pump to suck the lubricating oil in two of the existing one, by improving the injection speed sprayed from the nozzle to improve the water removal ability You can.

In addition, according to the dual structure of the vacuum chamber, by using two conventional vacuum pumps to maintain the vacuum in the vacuum chamber, it is possible to improve the water removal ability.

Therefore, there is an advantage that can significantly improve the purification ability of the water (dissolved water) and contaminants, such as dissolved in the waste lubricating oil.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Waste Lubricant Regeneration System

3 is a block diagram of a waste lubricating oil regeneration system according to a preferred embodiment of the present invention.

Waste lubricant regeneration system of the present invention, as shown in Figure 3, the oil inlet 10, the oil suction motor 20, the filter unit 30, the first to the N-th filter 31, the heater 40 , A vacuum chamber 50 consisting of an upper vacuum chamber 51 and a lower vacuum chamber 52, an oil discharge and supply motor 60, an oil outlet 70, a water condenser 80, and a first vacuum pump 90 , The second vacuum pump 100, the first condensate tank 110, the second condensate tank 120, the third condensate tank 130, the condensate discharge motor 140, the condensate filter 150, and the condensate outlet 160 ) And a plurality of solenoid valves (S1 to S13).

The oil inlet 10 is an inlet for introducing waste lubricant oil from the waste lubricant storage tank (not shown).

The oil suction motor 20 sucks waste lubricating oil through the oil inlet 10 and supplies it to the upper vacuum chamber 51.

The filter unit 30 receives waste lubricant oil from the oil suction motor 20 and removes foreign substances contained in the waste lubricant oil.

The filter unit 30 is composed of first to Nth filters each composed of a plurality of meshes, and when the filter is blocked by foreign matter, the next filter is automatically switched to operate, so that the blocked filter can be replaced and cleaned during operation. do. For example, the filter unit 30 installs three filters having a triple structure having a primary (general filter), a secondary (precision filter), and a tertiary (micro filter), and contaminates three times. Allow foreign substances to be removed from the lubricated oil.

The heater 40 receives waste lubricating oil from the filter unit 30, heats it to a predetermined temperature (for example, about 40 ° C. to about 70 ° C.), and then sprays nozzles 53 provided in the upper vacuum chamber 51. ). In addition, the heater 40 receives the lubricating oil discharged from the vacuum chamber 50 from the oil discharge and supply motor 60 and heats it to a predetermined temperature, and then the injection nozzle provided in the upper vacuum chamber 51 53).

The vacuum chamber 50 is composed of an upper vacuum chamber 51 and a lower vacuum chamber 52, and the lower vacuum chamber 52 is composed of a first storage tank 52a and a second storage tank 52b. .

Here, the upper vacuum chamber 51 is provided with one or more injection nozzles 53 for receiving and spraying the waste lubricating oil or lubricating oil heated from the heater 40, and by the injection of the injection nozzle 53 Separate lubricant and moisture. At this time, the upper vacuum chamber 51 is in a vacuum state by the first vacuum pump 90. When waste lubricating oil or lubricating oil is injected into the upper vacuum chamber 51 through the injection nozzle 53, the waste lubricating oil or lubricating oil is injected into the upper vacuum chamber 51. The moisture contained in the lubricant is evaporated. At this time, the water separated in the upper vacuum chamber 51 is discharged to the water condenser 80, the separated lubricating oil is stored to a predetermined height in the lower portion of the upper vacuum chamber 51. The interior of the upper vacuum chamber 51 is provided with a position sensor (not shown) for detecting the amount of lubricating oil.

Here, the one or more injection nozzles (53) rotates when injecting the waste lubricating oil or lubricating oil to spray the waste lubricating oil or lubricating oil, so as to increase the vaporization rate and the amount of vaporization of water mixed in the waste lubricating oil or lubricating oil. do.

The lower vacuum chamber 52 may include a first storage tank 52a configured to receive and store lubricating oil from the upper vacuum chamber 51 while the upper vacuum chamber 51 has the same vacuum, and the upper vacuum chamber ( And a second storage tank 52b for receiving and storing lubricating oil from the first storage tank 52a while the valve connected between the first storage tank 52a and the first storage tank 52a is closed. Therefore, the lower vacuum chamber 52 may always maintain a constant vacuum state of the upper vacuum chamber 51 when lubricating oil is discharged from the upper vacuum chamber 51 to the first storage tank 52a. .

The oil discharge and supply motor 60 discharges the lubricating oil stored in the second storage tank 52b to the oil discharge port 70 or is supplied to the upper vacuum chamber 51 through the heater 40.

The oil outlet 70 is a place where the lubricant oil stored in the second storage tank 52b of the lower vacuum chamber 52 is discharged out by the oil discharge and supply motor 60.

The water condenser 80 cools the vaporized water supplied from the upper vacuum chamber 51, converts the water into water, and then discharges the water into the first condensate tank 110.

The first vacuum pump 90 makes the upper vacuum chamber 51 into a vacuum state through the first condensate tank 110 and the water condenser 80.

The second vacuum pump 100 makes the lower vacuum chamber 52 and the second condensate tank 120 in a vacuum state.

The first condensate tank 110 stores the condensed water discharged from the water condenser 80, and is maintained in a vacuum state by the first vacuum pump 90.

The second condensate tank 120 receives and stores condensed water from the first condensate tank 110 under the same vacuum as the first condensate tank 110.

The third condensate tank 130 receives and stores condensed water from the second condensate tank 120 in a state in which a valve connected between the first condensate tank 110 and the second condensate tank 120 is closed.

The condensate discharge motor 140 discharges the condensate stored in the third condensate tank 130.

The condensate filter 150 receives condensate discharged from the condensate discharge motor 140 to remove foreign substances or oil components contained in the condensate and then discharges the condensate through the condensate outlet 160. The condensate filter 150 is composed of first to Nth filters each composed of a plurality of meshes.

The plurality of solenoid valves S1 to S13 are controlled by a controller (not shown) as follows.

First, the first solenoid valve s1 opens and closes the waste lubricating oil supplied from the oil inlet 10 to the oil suction motor 20.

The second solenoid valve s2 opens and closes the waste lubricating oil or lubricating oil supplied from the oil suction motor 20 or the oil discharge and supply motor 60 to the heater 40.

The third solenoid valve s3 opens and closes the waste lubricant oil supplied from the heater 40 to the upper vacuum chamber 51.

The fourth solenoid valve s4 is stored in the upper vacuum chamber 51 in a state where the fifth solenoid valve s5 is closed when the vacuum degree of the upper vacuum chamber 51 and the first storage tank 52a are the same. Lubricating oil is discharged to the first storage tank (52a).

The fifth solenoid valve s5 allows the lubricant stored in the first storage tank 52a to be discharged to the second storage tank 52b while the fourth solenoid valve s4 is closed.

The sixth solenoid valve s6 has a volume discharged into the first storage tank 52a when oil is discharged from the upper vacuum chamber 51 to the first storage tank 52a of the lower vacuum chamber 52. The pressure of the to the upper vacuum chamber to facilitate the discharge.

The seventh solenoid valve s7 purges the vacuum of the first storage tank 52a, and the eighth solenoid valve s8 fuzzy the vacuum of the second storage tank 52b. It plays a role.

The ninth solenoid valve s9 opens and closes the lubricating oil discharged from the oil discharge and supply motor 60 to the oil discharge port 70 or to be supplied to the heater 40.

The tenth solenoid valve s10 receives the pressure equal to the volume discharged into the first condensate tank 110 when the condensate is discharged from the first condensate tank 110 to the second condensate tank 120. 1 move to the condensate tank 110 to facilitate the discharge.

The eleventh solenoid valve s11 has the first condensate tank 110 in a state where the twelfth solenoid valve s12 is closed when the first condensate tank 110 and the second condensate tank 120 have the same degree of vacuum. The water stored in the discharge to the second condensate tank 120.

The twelfth solenoid valve s12 allows the water stored in the second condensate tank 120 to be discharged to the third condensate tank 130 while the eleventh solenoid valve s11 is closed.

The thirteenth solenoid valve s13 serves to purge the vacuum of the second condensate tank 120.

Waste Lubricant Regeneration Method

The waste lubricating oil regeneration method of the present invention having the above configuration will be described with reference to FIGS. 3 and 4.

First, by opening the first solenoid valve (s1) and then operating the oil suction motor 20 to suck the waste lubricating oil through the oil inlet 10 from the waste lubricating oil storage tank (not shown) (step S10) .

Then, the waste lubricating oil sucked by the oil suction motor 10 removes the foreign matter contained in the waste lubricating oil through the filter unit 31 (step S20). In this case, as described above, the filter unit 31 includes first to N-th filters respectively configured of a plurality of meshes, and when the filter is blocked by foreign matter, the next filter is automatically switched to operate. Therefore, the present invention has the advantage of being able to replace and clean the clogged filter even during operation. For example, the filter unit 30 installs three filters having a triple structure having a primary (general filter), a secondary (precision filter), and a tertiary (micro filter), and contaminates three times. Allow foreign substances to be removed from the lubricated oil.

In the conventional case, the filter is not installed or only one is installed, and thus the ability to remove foreign substances contained in the waste lubricating oil is not or significantly reduced.

Then, the waste lubricating oil from which foreign matters are removed from the filter unit 31 is heated to a predetermined temperature (for example, about 40 ° C. to 70 ° C.) through the heater 40 (step S30), and the upper vacuum chamber (51) It supplies to the injection nozzle 53 provided in the inside. At this time, the heater 40 receives the lubricating oil discharged from the vacuum chamber 50 through the oil discharge and supply motor 60 and heated to a predetermined temperature (for example, 40 ℃ ~ 70 ℃) after (Step S30) It is also supplied to the injection nozzle 53 installed in the upper vacuum chamber 51.

Then, the waste lubricant supplied to the injection nozzle 53 installed in the upper vacuum chamber 51 is injected into the upper vacuum chamber 51 through the injection nozzle 53 (step S40). At this time, the first storage tank 52a of the upper vacuum chamber 51 and the lower vacuum chamber 52 is vacuumed by the first vacuum pump 90 and the second vacuum pump 100, respectively. The operation is as follows.

The fourth solenoid valve s4, the sixth solenoid valve s6, and the tenth solenoid valve s10 provided between the upper vacuum chamber 51 and the first storage tank 52a of the lower vacuum chamber 52. ), The eleventh solenoid valve s11 is simultaneously opened, and the fifth solenoid valve s5, the seventh solenoid valve s7, and the eighth solenoid valve s8 which purge the vacuum of the vacuum chamber 51 and The first vacuum pump 90 and the second vacuum pump 100 are operated while the twelfth solenoid valve s12 and the thirteenth solenoid valve s13 are blocked. At this time, the internal pressure of the first condensate tank 110, the water condenser 80, and the upper vacuum chamber 51 is lowered by the first vacuum pump 90, and the second vacuum pump is brought into a vacuum pressure state. The internal pressure of the first storage tank 52a of the lower vacuum chamber 52 is lowered by the reference numeral 100 so as to be in a vacuum pressure state.

The waste lubricating oil heated in the heater 40 is supplied to the one or more injection nozzles 53 by the vacuum pressure inside the upper vacuum chamber 51 and the operation of the oil suction motor 20 to supply the upper vacuum chamber. (51) It is injected into the inside. At this time, the one or more injection nozzles (53) rotates when injecting the waste lubricating oil or lubricating oil to inject the lubricating oil or lubricating oil, so as to increase the vaporization rate and the amount of vaporization of the water mixed in the waste lubricating oil or lubricating oil desirable.

Then, when the waste lubricating oil is injected into the upper vacuum chamber 51 through the injection nozzle 53, it is adjusted to the saturated steam temperature of the water vapor corresponding to the vacuum pressure inside the upper vacuum chamber 51 When the water contained in the waste lubricant is evaporated, the lubricant and the water are separated (step S50).

Then, the lubricating oil separated from the upper vacuum chamber 51 is stored in the lower portion of the upper vacuum chamber 51, and when the lubricating oil reaches a certain level, the lubricating oil is detected by the upper position sensor (not shown). It is discharged to the first storage tank 52a of the lower vacuum chamber 52 (step S60), the operation at this time is as follows.

First, the fourth solenoid valve s4 located between the upper vacuum chamber 51 and the first storage tank 52a is blocked, and the first storage tank 52a and the second storage tank 52b are blocked. The fifth solenoid valve s5 disposed between the first and second solenoid valves s5 and s11 is disposed between the first condensate tank 110 and the second condensate tank 120. In the blocked state, when the level of the lubricating oil stored in the upper vacuum chamber 51 reaches a predetermined height, the controller (not shown) is operated by the upper position sensor that senses the fourth solenoid valve s4 and The sixth solenoid valve s6 is opened to discharge the lubricating oil stored in the upper vacuum chamber 51 to the first storage tank 52a.

At this time, the inside of the upper vacuum chamber 51 and the first storage tank 52a is blocked as the fifth solenoid valve s5 and the sixth to eighth solenoid valves s6 to s8 as described above. The vacuum state is maintained because it is. When the lubricant stored in the upper vacuum chamber 51 is discharged to a predetermined level, the controller is operated by a lower position sensor (not shown) installed in the upper vacuum chamber 51 and the fourth solenoid valve s4. The sixth solenoid valve s6 is blocked at the same time.

Next, when the level of the lubricating oil stored in the first storage tank 52a reaches a predetermined height, the controller is operated by an upper position sensor (not shown) that detects the first storage tank 52a and the first storage tank 52a. The fifth solenoid valve s5 and the seventh and eighth solenoid valves s7 and s8 positioned between the second storage tanks 52b are opened to operate in the first and second storage tanks 52a and 52b. Purge the vacuum. As a result, the lubricating oil stored in the first storage tank 52a is discharged to the second storage tank 52b (step S70).

At this time, since the fourth solenoid valve s4 and the sixth solenoid valve s6 are blocked, the upper vacuum chamber 51 maintains the vacuum state. When the lubricant stored in the first storage tank 52a is discharged to a predetermined level, the controller is operated by a lower position sensor (not shown) installed in the first storage tank 52a and the fifth solenoid valve s5. The seventh and eighth solenoid valves s7 and s8 are blocked.

Then, the inside of the first storage tank 52a is made to be in the same vacuum as the inside of the upper vacuum chamber 51 by using the second vacuum pump 100.

Then, when the fourth solenoid valve s4 is opened while the above operation is repeated, the upper vacuum chamber 51 and the first storage tank 52a maintain the same vacuum state, and the upper vacuum chamber 51 Lubricating oil stored therein can be discharged to the first storage tank 52a.

Accordingly, even when the lubricant separated in the upper vacuum chamber 51 is discharged out through the lower vacuum chamber 52, the first condensate tank 110, the water condenser 80, and the upper vacuum chamber 51 are internally discharged. The vacuum state of the constant is always constant. Thereby, the vaporization rate and vaporization amount of the water mixed in the waste lubricant oil can be increased.

Then, the lubricating oil stored in the second storage tank 52b is discharged to the oil outlet 70 by the oil discharge and supply motor 60 or the upper vacuum chamber 51 through the heater 40. To be supplied (steps S80 and S90).

On the other hand, the water evaporated in the upper vacuum chamber 51 in the step S50 is introduced into the water condenser 80 through a condenser tube (not shown) by the vacuum pressure of the first vacuum pump 90 side , And condensed in the water condenser 80 is stored in the first condensate tank 110 (step S100).

Next, when the condensate stored in the first condensate tank 110 reaches a predetermined level, the controller is operated by an upper position sensor (not shown) to operate the tenth solenoid valve s10 and the eleventh solenoid valve s11. ) Is opened. At this time, the twelfth solenoid valve s12 positioned between the second condensate tank 120 and the third condensate tank 130 is blocked. Condensate stored in the first condensate tank 110 is discharged to the second condensate tank 120 by opening the tenth solenoid valve s10 and the eleventh solenoid valve s11 (step S110).

When the condensate stored in the first condensate tank 110 is discharged to a predetermined level, the controller is operated by a lower position sensor (not shown) installed in the first condensate tank 110 and the tenth solenoid valve s10. And the eleventh solenoid valve s11 are shut off.

Then, when the level of the lubricating oil stored in the second condensate tank 120 reaches a predetermined height, the controller is operated by an upper position sensor (not shown) that detects the second condensate tank 120 and the The condensate stored in the second condensate tank 120 is opened by opening the twelfth solenoid valve s12 and the thirteenth solenoid valve s13 located between the third condensate tank 130 and the third condensate tank 130. (Step S120).

At this time, the inside of the first condensate tank 110 is maintained in a vacuum state because the tenth solenoid valve s10 and the eleventh solenoid valve s11 are blocked. When the condensate stored in the second condensate tank 120 is discharged to a predetermined level, the controller is operated by a lower position sensor (not shown) installed in the second condensate tank 120 and the twelfth solenoid valve s12. The thirteenth solenoid valve s13 is shut off.

Next, the inside of the second condensate tank 120 is made into a vacuum state in the same manner as the vacuum state inside the first condensate tank 110 by using the second vacuum pump 100.

Then, when the tenth solenoid valve s10 and the eleventh solenoid valve s11 are opened while repeating the above operation, the first condensate tank 110 and the second condensate tank 120 are in the same vacuum state. While maintaining the condensate stored in the first condensate tank 110 can be discharged to the second condensate tank 120.

Therefore, even when the condensate stored in the first condensate tank 110 is discharged out through the second and third condensate tanks 120 and 130, the first condensate tank 110 and the water condenser 80, the The vacuum inside the upper vacuum chamber 51 is always constant without change. Thereby, the vaporization rate and vaporization amount of the water mixed in the waste lubricant oil can be increased.

Then, the condensate stored in the third condensate tank 130 is discharged using the condensate discharge motor 140. In this case, the condensate discharged from the condensate discharge motor 140 is supplied from the condensate filter 150 to remove foreign substances or oil components contained in the condensate and then discharged through the condensate outlet 160 (steps S130 and S140). ). As described above, the condensate filter 150 includes first to Nth filters each configured of a plurality of meshes.

The present invention is not limited to the above-described embodiments, and various modifications and changes can be made by those skilled in the art, which should be regarded as included in the spirit and scope of the present invention as defined in the appended claims. will be.

1 is a block diagram of a device for removing water contained in the waste lubricant according to the prior art (Korean Patent Registration No. 10-0407161)

2 is a block diagram of a waste lubricating oil purification device (Korean Patent Registration No. 10-0407159) according to the prior art

3 is a block diagram of a waste lubricating oil regeneration system according to a preferred embodiment of the present invention

4 is a flowchart illustrating a method of regenerating waste lubricant oil according to a preferred embodiment of the present invention.

[Description of Code for Major Parts of Drawing]

10: oil inlet 20: oil suction motor

30 filter unit 31 first to Nth filters

40: heater 50: vacuum chamber

51: upper vacuum chamber 52: lower vacuum chamber

52a: first storage tank 52b: second storage tank

60: oil discharge and supply motor 70: oil outlet

80: water condenser 90: first vacuum pump

100 second vacuum pump 110 first condensate tank

120: second condensate tank 130: third condensate tank

140: condensate discharge motor 150: condensate filter

160: condensate outlet S1 ~ S13: solenoid valve

Claims (20)

In the waste lubricant regeneration system, An oil suction motor 20 for sucking waste lubricating oil through the oil inlet 10; A heater 40 which receives waste lubricating oil or lubricating oil from the oil suction motor 20 or the oil discharge and supply motor 60 and heats them to a predetermined temperature; An upper vacuum chamber 51 for separating lubricating oil and water by one or more injection nozzles 53 supplied with the waste lubricating oil heated from the heater 40 and injecting in a vacuum state, and the upper vacuum chamber 51; The first storage tank 52a for receiving and storing lubricating oil from the upper vacuum chamber 51 and the valve connected between the upper vacuum chamber 51 and the first storage tank 52a in the same degree of vacuum are closed. Has a lower vacuum chamber 52 composed of a second storage tank 52b for receiving and storing lubricating oil from the first storage tank 52a to maintain a constant vacuum degree of the upper vacuum chamber 51 at all times. A vacuum chamber 50; An oil discharge and supply motor 60 for discharging the lubricating oil stored in the second storage tank 52b to the oil discharge port 70 or supplying the heater 40 to the heater 40; And And a water condenser (80) for cooling and vaporizing the vaporized water supplied from the upper vacuum chamber (51) to discharge water. The waste lubricant regeneration system of claim 1, wherein A first condensate tank 110 for storing condensate discharged from the water condenser 80; A first vacuum pump (90) for maintaining the upper vacuum chamber (51) in a vacuum state through the first condensate tank (110) and the water condenser (80); A second condensate tank (120) for receiving and storing condensate from the first condensate tank (110) under the same vacuum as the first condensate tank (110); A third condensate tank 130 for receiving and storing condensate from the second condensate tank 120 in a state in which a valve connected between the first condensate tank 110 and the second condensate tank 120 is closed; And And a second vacuum pump (100) for maintaining the lower vacuum chamber (52) and the second condensate tank (120) in a vacuum state. The waste lubricant regeneration system of claim 2, wherein Condensate stored in the first condensate tank 110 in the state that the vacuum of the first condensate tank 110 and the second condensate tank 120 is the same and the twelfth solenoid valve s12 is closed, the second condensate tank An eleventh solenoid valve s11 discharged to the 120; A twelfth solenoid valve s12 for discharging the condensed water stored in the second condensate tank 120 to the third condensate tank 130 while the eleventh solenoid valve s11 is closed; When the condensate is discharged from the first condensate tank 110 to the second condensate tank 120, the pressure of the volume discharged into the first condensate tank 110 is moved to the first condensate tank 110. A tenth solenoid valve s10 for easily discharging; And And a thirteenth solenoid valve (s13) for purging the vacuum of the second condensate tank (120). 4. The waste lubricating oil regeneration system according to claim 2 or 3, wherein: And a condensate discharge motor (140) for discharging the condensate stored in the third condensate tank (130) to the condensate discharge port (160). 5. The waste lubrication oil regeneration system of claim 4 wherein: The condensate discharge motor 140 and the condensate outlet 160 is installed between, the condensate filter 150 for removing foreign substances or oil contained in the condensate; waste lubricant regeneration system comprising a . The method of claim 5, wherein the condensate filter 150 is: A waste lubricating oil regeneration system, comprising: first to Nth filters each composed of a plurality of meshes. The waste lubricant regeneration system of claim 1, wherein Installed between the oil suction motor 20 and the heater 40, the waste lubricating oil regeneration system characterized in that it further comprises a filter unit 30 for removing foreign matter contained in the waste lubricating oil. The method of claim 7, wherein the filter unit 30: It is composed of first to Nth filter each composed of a plurality of mesh, And a second filter is automatically switched to operate when the filter is clogged by foreign matter so that the filter can be replaced and cleaned during operation. The waste lubricant regeneration system of claim 1, wherein A first solenoid valve (s1) for opening and closing the waste lubricant oil supplied from the oil inlet (10) to the oil suction motor (20); A second solenoid valve (s2) for opening and closing the waste lubricant or lubricating oil supplied from the oil suction motor 20 or the oil discharge and supply motor 60 to the heater 40; And a third solenoid valve (s3) for opening and closing the waste lubricant oil supplied from the heater (40) to the upper vacuum chamber (51). The waste lubricant regeneration system of claim 1, wherein When the vacuum degree of the upper vacuum chamber 51 and the first storage tank 52a are the same, the lubricant stored in the upper vacuum chamber 51 is stored in the first storage tank 52a while the fifth solenoid valve s5 is closed. A fourth solenoid valve (s4) discharged to); A fifth solenoid valve s5 for discharging lubricating oil stored in the first storage tank 52a to the second storage tank 52b while the fourth solenoid valve s4 is closed; When oil is discharged from the upper vacuum chamber 51 to the first storage tank 52a of the lower vacuum chamber 52, the pressure corresponding to the volume discharged into the first storage tank 52a is moved to the upper vacuum chamber. A sixth solenoid valve s6 for easily discharging; A seventh solenoid valve s7 for purging the vacuum of the first storage tank 52a; And And an eighth solenoid valve (s8) for purging the vacuum of the second storage tank (52b). The waste lubricant regeneration system of claim 1, wherein And a ninth solenoid valve s9 for opening and closing the lubricating oil discharged from the oil discharge and supply motor 60 to the oil discharge port 70 or to be supplied to the heater 40. Waste Lubricant Regeneration System. The method of claim 1, wherein the heater is: Waste lubricant regeneration system, characterized in that for heating the waste lubricant to 40 ℃ to 70 ℃. The method of claim 1, The at least one injection nozzle (53) is a waste lubricating oil regeneration system, characterized in that for spraying the waste lubricant or lubricating oil while rotating. The method according to any one of claims 3, 9, 10 and 11, The waste lubricant regeneration system is: And a controller for controlling the operation of the first to thirteenth solenoid valves (s1 to s13), respectively. In the waste lubricating oil regeneration method, (a) sucking the waste lubricating oil using an oil suction motor; (b) removing foreign matter contained in the inhaled waste lubricant through a filter; (c) receiving waste lubricant oil from the filter and heating it with a heater; (d) injecting the waste lubricating oil heated from the heater into the upper vacuum chamber through at least one injection nozzle to separate lubricant and water; (e) When the lubricating oil of the upper vacuum chamber reaches a certain level, the first storage of the lubricating oil separated from the upper vacuum chamber while the valve connected between the first storage tank and the second storage tank of the lower vacuum chamber is shut off. Discharging to the tank; (f) when the lubricating oil of the first storage tank reaches a certain level, the lubricant is discharged from the first storage tank to the second storage tank while the valve connected between the upper vacuum chamber and the first storage tank is shut off. Then re-forming the first storage tank in a vacuum state by using a second vacuum pump; (g) discharging the lubricating oil stored in the second storage tank to an oil outlet using an oil discharge and supply motor or supplying the lubricant to the upper vacuum chamber through the heater; And and (h) cooling the water separated in the upper vacuum chamber in a water condenser to convert the water into water and then discharging the waste lubricating oil. The method of claim 15, wherein the waste lubricant regeneration method: Storing the condensate discharged from the water condenser in a first condensate tank; Discharging condensate from the first condensate tank to the second condensate tank when the water in the first condensate tank reaches a predetermined level, and shuts off a valve connected between the second condensate tank and the third condensate tank; And When the water in the second condensate tank reaches a predetermined level, the condensate is discharged from the second condensate tank to the third condensate tank while the valve connected between the first condensate tank and the second condensate tank is shut off, and then the Regenerating the second condensate tank in a vacuum state using a vacuum pump; waste lubricant recovery method further comprising. 17. The method of claim 16, wherein said waste lubricant regeneration is: Vacuuming the inside of the upper vacuum chamber through the first condensate tank and the water condenser using a first vacuum pump, Waste gas recovery method characterized in that the inside of the second condensate tank and the first storage tank in a vacuum state by using the second vacuum pump. 17. The method of claim 16, wherein said waste lubricant regeneration is: The waste lubricating oil regeneration method characterized in that for discharging the condensate stored in the third condensate pump through a condensate outlet using a condensate discharge motor. 19. The method of claim 18, wherein the waste lubricating oil regeneration method is: When the condensate stored in the third condensate tank is discharged out of the waste lubricating oil regeneration method characterized in that the foreign matter or oil contained in the condensate is removed through a condensate filter and discharged. The method of claim 15, wherein the waste lubricant regeneration method: Remove the foreign matter contained in the waste lubricating oil by using a plurality of filters, if the filter is blocked by foreign matter so that the next filter is automatically switched to operate, the waste filter characterized in that the filter can be replaced and cleaned during operation How to reclaim lubricant.

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