KR101917577B1 - The method for manufacturing of Environment Friendly Water Soluble Lubricant Oil - Google Patents

Abstract

The present invention relates to a method for producing environment-friendly water-soluble lubricating oil. The method for producing water-soluble lubricating oil by using waste lubricating oil having a granular material as a contaminant and moisture comprises: a pretreatment step of storing and pretreating the waste lubricating oil in a pretreatment tank; a two-phase separation step of separating the granular material and the liquid material by receiving the waste lubricating oil from the pretreatment tank to a two-phase separator; a filtration step of passing the liquid material discharged from the two-phase separator through a tubular filtration unit; a reaction step of receiving the liquid material from the filtration unit to a reaction tank, and condensing oil in the water-soluble waste lubricating oil; a separation step of separating oil condensed from the reaction tank into water and oil; a chemical reaction step of producing purified water by receiving the lower water separated from a separation tank to a chemical reaction tank; an oil storage step of storing the upper oil separated from the separation tank in an oil storage tank; an oil replenishment step of storing in an oil replenishment tank new unused water-soluble lubricating oil provided adjacent to the oil storage tank; and an aging step of mixing and aging in the aging tank the oil transferred from the oil storage tank and the new water-soluble lubricating oil transferred from the oil replenishment tank.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for manufacturing an environmentally friendly water-soluble lubricant,

The present invention relates to a process for producing an environmentally friendly water-soluble lubricant, and more particularly, to a process for producing an environmentally-friendly water-soluble lubricant by reducing the use of chemical substances causing environmental pollution and efficiently purifying particulate matter and water, And more particularly, to a process for producing an environmentally-friendly water-soluble lubricant which reuses the lubricating oil.

There are 375 waste lubricants available in Korea, and the actual amount of waste lubricant collected is reported to the Ministry of Environment to be around 2.5 million drums. The collected waste lubricating oil contains industrial and engine oil. Industrial lubricating oil is recycled as engine oil even though it can be recycled 2 ~ 3 times and consumes it as simple fuel.

Failure to recycle recyclable industrial lubricants will result in national economic losses due to the import of lubricants and will also result in environmental pollution and waste of industrial lubricants.

As the industry develops, the amount of waste oil used in automobiles, ships, and various industrial machinery is rapidly increasing, and these waste oils cause soil and water pollution. In order to prevent pollution by waste oil, it is used as fuel for energy recycling or combustion, but in this case, the secondary air environment is greatly polluted.

BACKGROUND ART [0002] In order to prevent contamination as described above, energy recycling work using waste oil has been intensively studied in various fields of industry. Typical waste oil refining techniques produce refined oil using ion purification, reduced pressure distillation or pyrolysis process have.

Among these refining technologies, ion purification is a method of producing products by removing moisture and sediment from waste oil and removing heavy metals etc. through chemical treatment. Since the produced product is a low grade lubricating oil itself, it is used only as a bunker C oil substitute fuel Respectively. The reduced pressure distillation is a simple physical refining process, and the refined oil produced by the reduced pressure distillation maintains the heavy lubricant component as it is. However, the heavy oil recovery rate is about 70%, which is disadvantageous in that a high operating temperature is required to raise the recovery rate and the plant facility cost is very high.

As described above, the high-temperature pyrolysis method is a method of producing refined fuel oil by decomposing and condensing low-molecular-weight waste oil having a high molecular weight in a state of high molecular weight by applying heat under high temperature and high pressure of 400 ° C by intercepting contact with air to be.

The high-temperature pyrolysis process has a disadvantage in that odor is generated in the process of operation. Since the process is complicated and the tar formed by the operation and the high temperature heating must be repeated, the workability is lowered and the recovery rate is not greatly improved. However, since it is contained in tar, it can not be used as a base oil for lubricating oil.

(Prior Patent) Korean Patent No. 10-0029135 (Aug. 30, 1989)

An object of the present invention is to provide a process for producing an environmentally friendly water-soluble lubricant using waste lubricating oil.

Another object of the present invention is to provide a water-soluble lubricant using a waste lubricating oil which can reduce the use of chemicals causing environmental pollution, efficiently remove pollutants contained in the waste lubricating oil, And a method for producing the same.

According to an aspect of the present invention, there is provided a method of manufacturing a water-soluble lubricant using waste lubricant having particulate matter and water as a contaminant, the method comprising: a pretreatment step of storing the waste lubricant in a pretreatment tank and pretreating the waste lubricant; A two-phase separation step of separating the particulate matter and the liquid matter from the waste oil by transferring the waste lubricating oil to the two-phase separator in the pretreatment tank and stirring the oil in the two-phase separator; A filtration step of passing a tubular filtration part through which a liquid material discharged from the two-phase separator passes and a sheave for blocking particulate matter; A reaction step of receiving the liquid material from the filtration unit into the reaction tank and agitating the oil in the water-soluble waste lubricating oil by a screw agitator in the reaction tank; A separation step of separating water and oil by transferring the agglomerated oil from the reaction tank to a separation tank to be stagnant; The lower water separated from the separation tank is transferred to the chemical reaction tank, the alkali water is added to the chemical reaction tank, the water is stirred at a pH of 6.8 to 7.3 at room temperature and the transferred water is stirred, A chemical reaction step to produce; An oil storage step of storing the upper oil separated in the separation tank in an oil reservoir; An oil replenishing step of storing new unused water-soluble lubricant oil in the oil replenishing tank provided adjacent to the oil reservoir; And an aging step of aging the oil transferred from the oil reservoir and the new water-soluble lubricant transferred from the oil replenishing tank by aging in an aging tank.

Wherein the pre-treatment tank is provided with a pretreatment tank provided with the waste lubricating oil and a heating jacket provided on an outer surface of the pretreatment tank to supply heat to the pretreatment tank to maintain the temperature of the waste lubricating oil at 30 ° C to 45 ° C, And a first nitrogen gas tank for injecting nitrogen gas into the interior of the pretreatment tank.

The temperature of the oil in the oil storage step may be 70 deg. C to 80 deg. C, and the temperature of the oil in the oil refilling step may be 82 deg. C to 85 deg.

In the aging step, the oil may be 20 wt% to 25 wt% in the aging tank, and the new water-soluble lubricant may be 75 wt% to 80 wt%.

In the pretreatment step, the waste lubricating oil is stored in the pretreatment tank and aged at a temperature of 40 DEG C for one day.

In the pretreatment step, the pretreatment tank receives the waste lubricating oil through a pretreatment tank, holds the waste lubricating oil in the pretreatment tank for one day, and the waste lubricating oil stored in the pretreatment tank is injected from the first nitrogen gas tank The nitrogen gas prevents oxidation and deterioration of the waste lubricating oil, and can be maintained at 30 캜 to 45 캜 by the heating jacket.

The two-phase separator includes a separation tank provided to rotate around a vertical rotation axis to separate particulate matter, which is a contaminant, into waste lubricant oil and discharge the separated particulate matter, and a centrifugal separator arranged to rotate around the vertical rotation axis, And a screw conveyor rotating at a speed different from that of the separation tank.

Wherein the separation tank is provided with a cylindrical upper portion and a conical lower portion, the upper portion and the lower portion being connected to each other by a screw conveyor provided in the separation tank, and an outer surface of the upper portion of the separation tank, And the heater can maintain the temperature of the waste lubricating oil stored in the upper portion of the separation tank at 40 ° C.

In the pretreatment step, the waste lubricating oil transferred from the pretreatment tank is introduced into the upper part of the separating tank rotating with the magnetic nanoparticles, and the centrifugal force generated in the separation tank causes the particulate matter and the magnetic nanoparticles And the magnetic nanoparticles are discharged through an outlet separate from the liquid material, and the magnetic nanoparticles are insoluble in the liquid material, and the liquid material is discharged to the filtration part, A ligand containing an ammonium group on the surface may be bonded to the particle through surface chemical bonding with the particulate material.

In the filtration step, the filtration unit includes a front end, a sheave, and a rear end in a tubular shape having an inner space so as to allow the liquid material discharged from the two-phase separator to pass therethrough, and the front end and the rear end are formed in a conical shape And the sheave is formed of a stainless steel mesh-like plate, and the inlet and the outlet of the rear end portion of the front end portion have the same area, and the sheave is 30% to 50% of the area of the outlet of the front end portion and the rear end portion, And a plurality of defoamers provided on the inner surface of the front end portion along the flow of the liquid material at the front end to guide the flow of the liquid material and to disintegrate the granular material, And a discharge port for discharging the granular material to the outside may be provided at a portion adjacent to the sheave have.

In the reaction step, the reaction tank has a cylindrical shape extending in one direction and into which a liquid material transferred from the filtration unit flows. The reaction tank is provided inside the reaction tank, and the liquid material is rotated at a speed of 45 to 55 cm / And a screw stirrer for stirring the liquid material.

The screw agitator is composed of a shaft extending from one end of the reaction tank to the other end and a helical blade connected to the shaft, and a plurality of And a heating wire may be provided inside the heating rib to supply heat to the inside of the reaction tank.

In the separating step, the liquid droplets aggregated by the oil droplets transferred through the fourth nozzle of the reaction tank are stagnated, the temperature in the separating tank is maintained at 30 ° C, And separating the water and the oil from the separation tank and supplying the oil separated from the separation tank to the reaction tank, wherein the separated oil supplied to the reaction tank contains the amount of the liquid material contained in the reaction tank 32-35%.

In the aging step, the aging tank is provided with a stirring part provided to mix the oil and the new water-soluble lubricating oil, and the bottom surface of the aging tank is provided with a bottom heater for supplying heat into the aging tank. And a second nitrogen gas tank for introducing nitrogen gas into the aging tank, wherein the agitating unit is configured such that one end of the agitating tank is connected to the additive hopper And a plurality of impellers connected to each other at the other end of the shaft.

Wherein one end and the other end of the shaft are open, and an additive provided in the additive hopper is introduced into one end of the shaft, the additive is introduced into the aging tank at the other end of the shaft, Wherein a valve is provided to control the introduction of the additive and a sensor for measuring the amount of the additive in the additive hopper is provided and the sensor and the valve are connected to the control unit, The amount of the additive to be transferred to the aging tank can be controlled by controlling the on / off of the valve by the amount of the additive.

Wherein the oil reservoir comprises a storage tank for storing the oil and a first heating jacket provided on the outer surface of the storage tank for applying heat to the oil, wherein the oil replenishing tank includes a replenishing tank for storing the new water- And a second heating jacket provided on the outer surface of the supplementary tank for applying heat to the new water-soluble lubricant.

Wherein the temperature of the second heating jacket is higher than the temperature of the first heating jacket, the temperature of the oil in the oil storing step is 70 ° C to 80 ° C, the temperature of the oil in the oil replenishing step is 82 ° C 85 < 0 > C.

As described above, according to the present invention, it is possible to provide a process for producing environmentally friendly water-soluble lubricant using waste lubricating oil.

According to the present invention, there is provided a water-soluble lubricant using waste lubricating oil capable of reducing the use of chemical substances causing environmental pollution and efficiently removing pollutants contained in the waste lubricating oil to provide improved water-soluble lubricating oil Method can be provided.

1 is a flowchart illustrating a method of manufacturing an environmentally-friendly water-soluble lubricant using waste lubricant according to an embodiment of the present invention.
2 is a schematic view of an apparatus for producing water-soluble lubricant using waste lubricating oil according to an embodiment of the present invention.
FIG. 3 is a view showing the pretreatment tank of FIG. 2. FIG.
Fig. 4 is a diagram showing the two-phase separator of Fig. 2. Fig.
5 is a cross-sectional view of Fig.
FIG. 6A is a view showing the filtration unit of FIG. 2. FIG.
6B is a view showing the inner surface of the front end portion of Fig. 6A.
FIG. 7 is a view showing the reaction vessel of FIG. 2. FIG.
8 is a view showing the aging tank of Fig. 2. Fig.
Figure 9 is a schematic representation of the flow of additive in the aging tank of Figure 8;
10 is a view showing the agitating part of FIG.

The details of other embodiments are included in the detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. In the following description, it is assumed that a part is connected to another part, But also includes a case in which other media are connected to each other in the middle. In the drawings, parts not relating to the present invention are omitted for clarity of description, and like parts are denoted by the same reference numerals throughout the specification.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a flowchart illustrating a method of manufacturing an environmentally-friendly water-soluble lubricant using waste lubricant according to an embodiment of the present invention.

According to an embodiment of the present invention, there is provided a method of manufacturing a water-soluble lubricant using particulate matter as a pollutant and waste lubricating oil having moisture, the method comprising: a pretreatment step (S100) of storing the waste lubricating oil in a pre- ; Phase separation step (S200) of transferring the waste lubricating oil to the two-phase separator in the pretreatment tank and stirring the mixture in the two-phase separator to separate the particulate matter and the liquid matter; A filtration step (S300) of passing a tubular filtration unit having a sheave through which the liquid material discharged from the two-phase separator passes and blocks particulate matter; A reaction step (S400) of transferring the liquid material from the filtration unit to the reaction tank and agitating the oil in the water-soluble waste lubricating oil by stirring in a screw mixer in the reaction tank (S400); A separation step (S500) of separating water and oil by transferring the coagulated oil from the reaction tank to the separation tank to be stagnant; The lower water separated from the separation tank is transferred to the chemical reaction tank, the alkali water is added to the chemical reaction tank, the water is stirred at a pH of 6.8 to 7.3 at room temperature and the transferred water is stirred, (S600); An oil storage step (S700) for storing the upper oil separated in the separation tank in an oil reservoir; An oil replenishing step (S800) of storing an unused new water-soluble lubricant oil provided in the oil reservoir in the oil replenishing tank; And an aging step (S900) of aging the oil transferred from the oil reservoir and the new water-soluble lubricant transferred from the oil replenishing tank in an aging tank.

In the pretreatment step (S100), the pretreatment tank is provided on the outer surface of the pretreatment tank and the pretreatment tank, in which the waste lubricating oil is provided, to supply heat to the pretreatment tank to heat the waste lubricating oil to 30 to 45 DEG C A jacket, and a first nitrogen gas tank for injecting nitrogen gas into the interior of the pretreatment tank.

The pretreatment tank may receive the waste lubricating oil through a pretreatment tank and maintain the waste lubricating oil in the pretreatment tank for a day. The waste lubricating oil stored in the pretreatment tank prevents oxidation and deterioration of the waste lubricating oil by the nitrogen gas injected from the first nitrogen gas tank and is maintained at 30 ° C to 45 ° C by the heating jacket, And moisture can be easily separated. If the temperature is less than 30 ° C, the particles in the waste lubricating oil are not easily separated. If the temperature is higher than 45 ° C, the oil contained in the waste lubricating oil may be partially deteriorated in the pretreating tank.

Preferably, in the pretreatment step (SlOO), the waste lubricating oil is stored in the pretreatment tank and aged at a temperature of 40 DEG C for one day. The waste lubricating oil may be subjected to a process of purifying particulate matter and water which are contaminants that follow. In the pretreatment step (S100), the waste lubricating oil is aged at the temperature so that separation of the particulate matter from water can be performed more efficiently have.

In the biphasic separation step S200, the two-phase separator is provided to rotate around a vertical rotation axis to separate particulate matter, which is a contaminant, from the waste lubricating oil, and to discharge the separated particulate matter. The separating tank rotates about the vertical rotation axis, And a screw conveyor rotating at a speed different from that of the separation tank in the interior of the separation tank.

The separation tank may include a cylindrical upper portion and a conical lower portion, and the upper portion and the lower portion may be connected to each other by a screw conveyor provided in the separation tank. The outer surface of the upper portion of the separation tank may be provided with a heater to maintain the temperature of the waste lubricating oil transferred to the upper portion of the separation tank at 30 ° C to 45 ° C.

The heater can keep the waste lubricating oil stored in the upper portion of the separation tank similar to the temperature in the pretreatment tank, thereby making it easier to separate the particulate matter from the waste lubricating oil. Preferably, the temperature can be maintained at 40 占 폚.

In the filtration step (S300), the filtration part includes a front end, a sheave, and a rear end, the inner part of which is hollow so as to allow the liquid material discharged from the two-phase separator to pass therethrough. Wherein the front end and the rear end are conical and the sheave is a mesh-like plate made of stainless steel, and the inlet and the outlet of the rear end of the front end have the same area, And 30% to 50% with respect to the area of the exit of the rear end portion.

And a plurality of defoamers provided on the inner surface of the front end portion along the flow of the liquid material at the front end to guide the flow of the liquid material and to disintegrate the granular material, And a discharge port for discharging the particulate matter to the outside.

In the reaction step S400, the reaction tank has a cylindrical shape extending in one direction and into which a liquid material transferred from the filtration unit flows. The reaction tank is provided inside the reaction tank, and the liquid material is supplied at a rate of 45 to 55 cm / s And a screw stirrer for stirring the liquid material while rotating.

The screw stirrer may include a shaft extending from one end of the reaction tank to the other end, and a helical blade connected to the shaft. Inside the reaction tank, a plurality of heating ribs are provided at upper and lower portions, respectively, so as to be provided between the helical blades, and a heating wire may be provided inside the heating rib to supply heat to the inside of the reaction tank.

The predetermined flow rate in the reaction tank is preferably 45 to 55 cm / s in one direction. When the stirring speed is 45 cm / s or less, oil droplets of 15 μ or less remain in the water. Further, when the stirring speed is higher than 55 cm / s, the size of the aggregated oil droplet does not increase by more than 5 mm due to the obstruction of the agglomeration process.

In the separation tank, the gaseous droplets transferred through the fourth nozzle of the reaction tank may be agglomerated to separate the water and oil. The temperature inside the separator is maintained at 30 ° C, and the water and the oil can be effectively separated by keeping the separator in the separator for 20 hours.

In the separation step, the oil separated from the separation tank may be re-supplied to the reaction tank to increase the rate of agglomeration of oil droplets in the liquid material in the reaction step. It may be 32 to 35% based on the volume of the liquid material to be provided.

Alternatively, in the separating step (S500), the liquid material transferred from the pre-treatment tank is introduced into the rotating separating tank at an upper portion thereof and is introduced together with the magnetic nanoparticles, and the centrifugal force generated in the separating tank The material and the magnetic nanoparticles can be separated from the liquid material, which is an oil.

Wherein the liquid material is delivered to the filtration unit, the granular material and the magnetic nanoparticles are discharged through an outlet separate from the liquid material, and the magnetic nanoparticles are insoluble in the liquid material, A ligand containing an ammonium group on the surface may be bonded to bond with the particles through bonding.

The magnetic nanoparticle has an ammonium group having an ionic group on its surface as a ligand and has a magnetic property so that the magnetic nanoparticle acts as a seed upon agglomeration of oil droplets in the reaction step (S400) have.

The separating step (S500) may further include removing the magnetic nanoparticles contained in the oil droplets. The magnetic nanoparticles are magnetized, and the oil droplets can be separated from the magnetic nanoparticles by passing the oil droplets through a device for imparting magnetism.

The temperature of the oil in the oil storage step S700 is 70 deg. C to 80 deg. C, and the temperature of the new water soluble lubricant in the oil replenishing step S800 may be 82 deg. C to 85 deg. The temperature of the new water-soluble lubricant in the oil replenishing step (S800) is maintained at a higher temperature than the regenerated oil, so that in the course of mixing in the aging step (S900), the oil recovered by the relatively high temperature of the novel water- It is possible to further improve the physical properties of the substrate.

In the aging step (S900), the oil may be 20 wt% to 25 wt% in the aging tank, and the new water-soluble lubricant may be 75 wt% to 80 wt%.

In the aging step (S900), the aging tank is provided with an agitating part provided to mix the oil and the new water-soluble lubricant, and the bottom surface of the aging tank is provided with a bottom heater for supplying heat into the aging tank. An additive hopper connected to the upper portion of the aging tank to deliver the additive into the aging tank, and a second nitrogen gas tank for introducing nitrogen gas into the aging tank.

The agitating part is provided with a shaft having one end connected to the additive hopper at the upper part of the aging tank and rotating in the form of an empty tube, and a plurality of impellers connected at the other end of the shaft. One end and the other end of the shaft are opened and the additive contained in the additive hopper is introduced into one end of the shaft so that the additive can be injected into the aging tank at the other end of the shaft.

A valve is provided at a portion where the additive hopper and the shaft are connected to control the flow of the additive and a sensor for measuring an amount of the additive in the additive hopper is provided, have.

The controller may control the amount of the additive transferred to the aging tank by controlling on / off of the valve according to the amount of the additive measured by the sensor.

Wherein the oil reservoir comprises a storage tank for storing the oil and a first heating jacket provided on the outer surface of the storage tank for applying heat to the oil, wherein the oil replenishing tank includes a replenishing tank for storing the new water- And a second heating jacket provided on the outer surface of the supplementary tank for applying heat to the new water-soluble lubricant. For example, the temperature of the second heating jacket may be higher than the temperature of the first heating jacket. Preferably, the temperature of the oil in the oil storage step is 70 ° C to 80 ° C, and the temperature of the oil in the oil replenish step is 82 ° C to 85 ° C.

The oil in the oil storing step is regenerated oil using waste lubricating oil. In the oil replenishing step, a new water-soluble lubricating oil can be used. By keeping the new water-soluble lubricating oil at a higher temperature than the regenerated oil, The quality of the produced lubricating oil can be further improved by the novel water-soluble lubricating oil.

2 is a schematic view of an apparatus for producing water-soluble lubricant using waste lubricating oil according to an embodiment of the present invention. FIG. 3 is a view showing the pretreatment tank of FIG. 2. FIG. Fig. 4 is a diagram showing the two-phase separator of Fig. 2. Fig. 5 is a cross-sectional view of Fig. FIG. 6A is a view showing the filtration unit of FIG. 2. FIG. 6B is a view showing the inner surface of the front end portion of Fig. 6A. FIG. 7 is a view showing the reaction vessel of FIG. 2. FIG. 8 is a view showing the aging tank of Fig. 2. Fig. Figure 9 is a schematic representation of the flow of additive in the aging tank of Figure 8; 10 is a view showing the agitating part of FIG.

An embodiment of the present invention relates to an apparatus for producing a water-soluble lubricant using particulate matter as a contaminant and waste lubricating oil having moisture, wherein an apparatus 10 for manufacturing an aqueous lubricating oil using waste lubricating oil comprises a pretreatment (100); A two-phase separator (200) for separating the particulate matter and the liquid matter by stirring the waste lubricating oil transferred from the pretreatment tank (100); A tubular filtration unit 300 having a sheave for passing the liquid material discharged from the two-phase separator 200 and blocking particulate matter; A reaction tank (400) for agitating the oil in the water soluble waste lubricating oil by stirring the liquid material transferred from the filtration unit (300) with a screw agitator; A separating tank 500 for separating water and oil by transferring the coagulated oil from the reaction tank 400 to stagnate; A chemical reaction tank 600 which receives the lower water separated from the separation tank 500 and generates purified water by stirring the transferred water in the state where alkali is added and the acidity is adjusted; An oil reservoir 700 for storing the upper oil separated from the separation tank 500; An oil replenishing tank 800 provided adjacent to the oil reservoir 700 to store new unused water-soluble lubricant; And an aging tank 900 for mixing and aging the oil transferred from the oil reservoir 700 and the new water-soluble lubricant transferred from the oil replenishing tank 800.

The pretreatment tank 100 is provided on a pretreatment tank 110 provided with the waste lubricating oil and on the outer surface of the pretreatment tank 110 to supply heat to the pretreatment tank 110 so that the temperature of the waste lubricating oil is maintained at 30 [ And a first nitrogen gas tank 130 for injecting nitrogen gas into the interior of the pretreatment tank 110. In the aging tank 900, the oil may be 20 wt% to 25 wt%, and the new water-soluble lubricant may be 75 wt% to 80 wt%.

The pretreatment tank (100) allows moisture to be easily separated from the particulate matter in the waste lubricating oil before separating the particulate matter from moisture in the waste lubricating oil having particulate matter and contaminants, So that the oil after the separation can be reused.

The pretreatment tank 100 can store the waste lubricating oil through the pretreatment tank 110 and maintain the waste lubricating oil in the pretreatment tank 100 for a day. The waste lubricating oil stored in the pretreatment tank 100 prevents oxidation and deterioration of the waste lubricating oil by the nitrogen gas injected from the first nitrogen gas tank 130, Lt; RTI ID = 0.0 > C < / RTI > to facilitate subsequent separation of the particulate material and water. If the temperature is less than 30 ° C, the particles in the waste lubricating oil are not easily separated. If the temperature is above 45 ° C, the oil contained in the waste lubricating oil may be partially deteriorated in the pretreatment tank 100. Preferably, the temperature may be < RTI ID = 0.0 > 40 C. < / RTI >

The waste lubricating oil aged in the pretreatment tank 100 is transferred to the two-phase separator 200 through the first nozzle 101 to remove the particulate matter contained in the waste lubricating oil before moisture.

The two-phase separator 200 includes a separation tank 270 rotatable about a vertical rotation axis R for separating particulate matter as a contaminant into and out of the waste lubricating oil, And a screw conveyor 280 that rotates at a different speed from the separation tank 270 in the separation tank 270.

The separating tank 270 is provided with a cylindrical upper portion 270a and a conical lower portion 270b and the upper portion 270a and the lower portion 270b are provided with a screw Can be connected to each other by a conveyor (280). A heater 201 is provided on the outer surface of the upper portion 270a of the separation tank 270 to maintain the temperature of the waste lubricating oil transferred to the upper portion 270a of the separation tank 270 at 30 ° C to 45 ° C .

The heater 201 maintains the waste lubricating oil stored in the upper portion 270a of the separation tank 270 similar to the temperature in the pretreatment tank 100 to facilitate the separation of the particulate matter in the waste lubricating oil . Preferably, the temperature can be maintained at 40 占 폚.

The upper portion 270a includes an axially upwardly extending extension in the form of a hollow rotor shaft 290 which is connected to a drive device (not shown) for rotating the separation tank 270 about the axis of rotation R .

An additional hollow shaft 210a extends into the separation tank 270 through the interior of the hollow rotor shaft 290. [ The hollow shaft 210a supports the screw conveyor 280 by a screw 211 and is drivingly connected to a screw conveyor 280 and is hereinafter referred to as a conveyor shaft 210a. The screw conveyor 280 includes a cylindrical upper conveyor portion 280a extending axially within the cylindrical upper portion 270a, a conical lower conveyor portion 280b extending axially within the conical lower portion 270b, And a conveyor flight 280c spirally extending along the upper cylindrical portion 280a and the lower conical portion 280b of the screw conveyor 280. [ Of course, the screw conveyor 280 may have more than one conveyor flight 280c, for example two or three conveyor flights, all extending in a helical manner along the interior of the separating tank 270.

An inlet pipe 212 for the liquid mixture to be treated in the separation tank 270 extends through the conveyor shaft 210a and into the central sleeve 213 inside the screw conveyor 280. [ The central sleeve 213 bounds an inlet chamber 214 for the liquid mixture wherein the inlet chamber 214 communicates with the separation chamber 215 via a radially extending distribution channel 216.

The separation chamber 215 is an annular space surrounding the inlet chamber 214 and including a stack of conical large separation discs 217. The stack fits radially into the interior of the cylindrical portion 280a of the screw conveyor 280 and is coaxially aligned with the rotation axis R. [ The conical separating disc 217 coaxially lies between the upper conical bulk support plate 218 and the lower conical bulk support plate 219. The lower support plate 219 is formed integrally with the center sleeve 213. The separation disk 217 includes a hole forming a channel 220 for axial flow and distribution of liquid through the stack of separation discs 217. The lower support plate 219 includes a corresponding hole (not shown) so that the distribution channel 216 is in communication with the channel 220 for axial flow of liquid in the stack of separation discs 217 . The upper support plate 218 includes a plurality of holes 221 connecting the radially inner annular space 222 and the liquid outlet chamber 223 in the stack of the separation discs 217. The liquid may be, for example, oil. A so-called pairing disc 224 for discharging the purified oil is disposed in the outlet chamber 223. The pairing disc 224 is fixed and rigidly connected to the inlet pipe 212 wherein the pairing disc 224 communicates with an outlet channel 225 extending in an outlet pipe surrounding the inlet pipe 212.

The cylindrical portion 280a of the screw conveyor 280 radially surrounds the stack of separation discs 217 wherein the cylindrical portion 280a includes a plurality of axially extending apertures 226 distributed around the axis of rotation R do. An axially extending opening 260 is provided to allow the separated particles to pass through the inner wall of the cylindrical upper portion 270a of the separation tank 270 to be deposited. Of course, the liquid may pass through the opening 260 in the cylindrical portion 280a of the screw conveyor 280. [

The separation tank 270 has at its lower end a solid outlet 227 for the separated particles and separation aid (solids). In connection with this solid outlet 227, the separation tank 270 may be surrounded by a container (not shown) for collecting and collecting the solid exiting the solid outlet 227. The solids are transported by the conveyor flight 280c toward the solid outlet 227 and out of the solid outlet. Thus, during operation, the screw conveyor 280 is arranged to rotate at a differential speed with the separation tank 270, whereby the solids are discharged by the conveyor flight 280c of the screw conveyor 280. [ This different speed between the separation tank 270 and the screw conveyor 280 may be adjusted by varying the amount of torque required to drive the screw conveyor 280 for, for example, the degree of drying required for discharged solids and / And may be constant or varied in a known manner. In cases where it is very difficult to discharge solids, the separation tank 270 may be operated with a cycle that even includes a solid discharge phase at a lower rotational speed than the separation phase. Thus, the solid is more easily discharged as the centrifugal force inside the separation tank 270 is reduced at a lower speed.

Moreover, after the operation is inhibited (or stopped), the centrifuge may need to be cleaned before re-start. Therefore, some residual mixture of solid and liquid may be present inside the stack of the separating disk 217, which needs to be cleaned before the separating operation is resumed. This can be accomplished by rotating the screw conveyor 280 in a fixed (and empty) separation tank 270 with a stack of separation discs 217.

Thus, the remaining mixture will be discarded from the stack into the inner wall of the fixed rotor, where it is easily discharged from the solid outlet 227 by gravity and a rotating screw conveyor 280.

The screw conveyor 280 is made integrally with a polymeric material, such as plastic or nylon, which can be fiber-reinforced. Conical portion 280b has a hollow interior or cavity, which can be sealed or open to the environment. The cavity may be filled with some material having a relatively low density, such as a cellular plastic or the like. Furthermore, the conical lower portion 270b of the separation tank 270 is arranged with the support device 228 for the screw conveyor.

Since the screw conveyor 280 rotates at a different speed than the separating tank 270, the abrasion-resistant element not shown in the drawing is a solid solid cake, that is, a kind of cutting insert that provides a tangential cutting force to the heavy phase of the particle- Lt; / RTI > This cutting effect will loosen the hardened abrasive cake, making it easier to discharge and less detrimental to the conveyor flight. Generally, the wear resistant element can be made of any material that is harder than the conveyor flight. However, in the high-speed separation of the liquid mixture leaving a solid solid cake on the inner wall of the separation tank 270, the wear-resistant element must also be made of a material that is harder than a solid solid cake. The abrasion resistant element may be made of any suitable abrasion resistant material, such as an oxide or non-oxide ceramic, metal, diamond or any composite material or combination thereof.

Preferably, the screw conveyor 280 is made of stainless steel, and the surface of the screw conveyor 280 may be coated with a wear-resistant coating, such as a melamine resin. The oil, which is a liquid material in which the particulate matter is separated in the two-phase separator 200, is delivered to the filtration unit 300 through the second-1 nozzle 201. The particulate matter is passed through the second- And the second -2 nozzle 202 provided separately from the second nozzle.

The filtration unit 300 may include a front end 310, a sheave 320, and a rear end 330, which are hollow and have an inner shape to allow the liquid material discharged from the two-phase separator 200 to pass therethrough. have. The front end portion 310 and the rear end portion 320 may have a conical shape, and the sheave 320 may be a mesh-like plate made of stainless steel.

The sheave 320 has an area equal to or greater than the area of the inlet of the front end 310 and the outlet of the rear end 330, % To 50%.

If the area of the sheave 320 is less than 30%, a load may be generated due to a reduction in the speed of the sheave 320. If the area of the sheave 320 is more than 50%, the separation of the particulate material from the sheave 320 may not be sufficiently performed have.

The sheave 320 may be provided in a network form and may separate foreign matter remaining in the liquid material passing through the filtration unit 300. The sieve 320 may have a sieve size of 60 to 80 占 퐉, and may be formed of stainless steel and may have a carbon coated surface.

If the size of the sieve in the sheave 320 is less than 60 탆, the passing speed of the liquid material in the form of oil having a high viscosity is difficult, and if it is more than 80 탆, it is difficult to separate the remaining foreign matters. In addition, the surface of the sheave 320 is coated with carbon, and the carbon can improve the abrasion resistance of the sheave 320 and can adsorb foreign matter contained in the liquid material.

The inner surface of the front end 310 may be provided with a plurality of deformers 311 provided along the flow of the liquid material at the front end so as to guide the flow of the liquid material and to disaggregate the granular material . The front end 310 may have a discharge port 302 for discharging the particulate matter to the outside at a portion adjacent to the sheave 320.

The deformer 311 is provided with a blade so as to guide the flow of the liquid material on the inner surface of the front end 310 and to reduce the frictional force on the inner surface of the front end 310 and to dissolve the aggregation of the particulate matter . In addition, the filtration part 300 is provided with the discharge port 302 to discharge the granular material separated by the sheave 320. The liquid material passing through the filtration unit 300 is transferred to the reaction tank 400 through the third nozzle 301.

The reaction tank 400 includes a reaction tank 410 having a cylindrical shape extending in one direction and through which the liquid material transferred from the filtration unit 400 flows and a reaction tank 410 disposed inside the reaction tank 410, and a screw stirrer 420 which stirs the liquid material while rotating at a speed of 1 / sec.

The screw stirrer 420 includes a shaft 421 extending from one end of the reaction tank 410 to the other end and a helical blade 422 connected to the shaft 421.

A plurality of heating ribs 411 are provided in the upper and lower parts of the reaction tank 410 so as to be provided between the helical blades 422. The heating ribs 411 are provided inside the reaction tank 411, 410 may be provided with a heat ray 412. [

In the reaction tank 400, the particulate matter among the waste lubricating oil is separated and water can be separated from the liquid material containing the remaining water. In the reaction tank 400, the liquid in the liquid material can be agglomerated by stirring in one direction at a predetermined flow rate. The predetermined flow rate in the reaction tank 400 is preferably 45 to 55 cm / s in one direction. When the stirring speed is 45 cm / s or less, oil droplets of 15 μ or less remain in the water. Further, when the stirring speed is higher than 55 cm / s, the size of the aggregated oil droplet does not increase by more than 5 mm due to the obstruction of the agglomeration process.

In the reaction vessel 400, a heating rib 411 for transferring heat to the liquid material may be provided. The liquid material in contact with the helical blade 422 due to the rotation of the screw stirrer 420 rotating in the reaction tank 410 is partially heated by friction heat. On the other hand, the portion not in contact with the helical blade 422 is unaffected by the friction and the temperature is uneven, whereby the oil droplets may be agglomerated in different regions. In the meantime, the reaction vessel 400 according to the present embodiment is provided with the heating rib 411 between the horn blades 422, and the heating rib 411 is provided with the heating wire 412, It is possible to control the temperature difference between the portion contacting the hermetic blade 422 and the other portion.

The liquid material transferred from the reaction tank 410 through the filtration unit 300 flows through the third nozzle 301 and the liquid material containing oil droplets cohered in the reaction tank 410 flows into the fourth And can be discharged through the nozzle 401. The third nozzle 301 may be provided adjacent to the lower end of one side of the reaction tank 410 and the fourth nozzle 401 may be adjacent to the upper end of the other side of the reaction tank 410. The phase difference between the third nozzle 301 and the fourth nozzle 401 makes it possible to more easily perform separation of oil and water in the subsequent separator 500.

In the separation tank 500, the gaseous droplets transferred through the fourth nozzle 410 of the reaction tank 400 may be collected to separate the water and the oil. The temperature of the inside of the separating tank 500 is maintained at 30 ° C. and the water and the oil can be effectively separated by keeping the separating tank 500 in the separating tank 500 for 20 hours.

Alternatively, the oil or the oil in the emulsion state (oil in the agglomeration stage) separated in the separating tank 500 is again supplied to the reaction tank 400 to accelerate agglomeration. The separated oil or the coagulated oil supplied to the reaction tank 400 may be added in an amount of 32 to 35% based on the volume of the liquid material contained in the reaction tank 410.

The separated oil supplied to the reaction tank 400 may act as a seed of an oil droplet in the reaction tank 400. If the volume ratio is to be added within the above range, the oil droplet is formed to have a predetermined size The oil can be efficiently agglomerated in a uniform size.

The lower water separated in the separation tank 500 is transferred to the chemical reaction tank 600 through the 5-1 nozzle 501 and the separated oil is supplied to the oil reservoir 700 ). ≪ / RTI >

In the chemical reaction tank 600, purified water can be produced by adding alkali to the water transferred through the No. 5 nozzle 501 of the separation tank 500 and adjusting and stirring the acidity. The chemical reaction tank 600 can control the acidity of the water at a pH of 6.8 to 7.3 at room temperature.

The oil reservoir 700 may include a storage tank 710 for storing the oil and a first heating jacket 720 provided on the outer surface of the storage tank 710 to apply heat to the oil. The oil replenishing tank 800 includes a replenishing tank 810 storing the new water-soluble lubricant and a second heating jacket 820 provided on the outer surface of the replenishing tank 810 to apply heat to the new water- Lt; / RTI >

The temperature of the second heating jacket 820 may be higher than the temperature of the first heating jacket 720. The temperature of the oil in the oil reservoir 700 is 70 ° C to 80 ° C and the temperature of the new water-soluble lubricant in the oil replenisher 800 may be 82 ° C to 85 ° C. By maintaining the temperature of the new water-soluble lubricating oil provided in the oil replenishing tank 800 higher, it is possible to further improve the quality of the oil formed by mixing with the oil to be recycled in the oil storage tank 700.

The oil of the oil reservoir 700 is transferred to the aging tank 900 through the seventh nozzle 701 and the new water-soluble lubricant of the oil reservoir tank 800 is supplied to the aging tank 900).

The aging tank 900 is provided with an agitator 910 for mixing the oil and the new water-soluble lubricant and the bottom of the aging tank 900 is supplied with heat to the inside of the aging tank 900 A bottom heater 940 may be provided. An additive hopper 920 connected to an upper portion of the aging tank 900 to transfer the additive into the aging tank 900 and a second nitrogen gas tank 930 for injecting nitrogen gas into the aging tank 900, May be further included.

The agitating unit 910 includes a shaft 911 having one end 910a connected to the additive hopper 920 at an upper portion of the aging tank 900 and rotating in the form of an empty tube, And a plurality of impellers 912 connected to each other. One end 910a and the other end 910a of the shaft 911 are opened and an additive contained in the additive hopper 920 is introduced into one end 910a of the shaft 910b so that the additive is introduced into the other end 910b of the shaft And is introduced into the aging tank 900.

The additive may be uniformly injected into the aging tank 900 by the shaft 911, which flows through the shaft 911 and rotates. In addition, at the lower side of the aging tank 900, nitrogen gas is introduced, whereby mixing of the additive with the oil and the novel water-soluble lubricant can be made more uniform.

In the additive hopper 920, an additive for a water-soluble lubricant, for example, a lubricant, a rust inhibitor, an emulsifier, or the like may be included and may be made of a material for improving the performance of the water-soluble lubricant.

A valve 921 is provided at a portion where the additive hopper 920 and the shaft 911 are connected to control the flow of the additive and a sensor 922 for measuring the amount of the additive in the additive hopper 920 And the sensor 922 and the valve 921 may be connected to the control unit 1000.

The controller 1000 can control the amount of the additive transferred to the aging tank 900 by controlling the on / off state of the valve 921 according to the amount of the additive measured by the sensor 922.

In the aging tank 900, the oil may be 20 wt% to 25 wt%, and the new water-soluble lubricant may be 75 wt% to 80 wt%. In the aging tank 900, a final water-soluble lubricant is produced. If the content ratio of the oil prepared by purifying the waste lubricant to the new water-soluble lubricant is within the above-mentioned range, the final water- And may have corresponding characteristics.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

10: Manufacturing apparatus for water-soluble lubricant
100: Pretreatment tank
200: Two phase separator
300:
400: Reactor
500: separator
600: chemical reaction tank
700: Oil storage tank
800: Oil replenishing tank
900: Aging tank

Claims (9)

A method for producing a water-soluble lubricant using a particulate material as a contaminant and a waste lubricating oil having moisture,
A pretreatment step of storing the waste lubricating oil in a pretreatment tank and pretreating the waste lubricating oil;
A two-phase separation step of separating the particulate matter and the liquid matter from the waste oil by transferring the waste lubricating oil to the two-phase separator in the pretreatment tank and stirring the oil in the two-phase separator;
A filtration step of passing a tubular filtration part through which a liquid material discharged from the two-phase separator passes and a sheave for blocking particulate matter;
A reaction step of receiving the liquid material from the filtration unit into the reaction tank and agitating the oil in the water-soluble waste lubricating oil by a screw agitator in the reaction tank;
A separation step of separating water and oil by transferring the agglomerated oil from the reaction tank to a separation tank to be stagnant;
The lower water separated from the separation tank is transferred to the chemical reaction tank, the alkali water is added to the chemical reaction tank, the water is stirred at a pH of 6.8 to 7.3 at room temperature and the transferred water is stirred, A chemical reaction step to produce;
An oil storage step of storing the upper oil separated in the separation tank in an oil reservoir;
An oil replenishing step of storing new unused water-soluble lubricant oil in the oil replenishing tank provided adjacent to the oil reservoir; And
And an aging step of mixing the oil transferred from the oil reservoir and the new water-soluble lubricant delivered from the oil replenishing tank in an aging tank,
Wherein the pre-treatment tank is provided with a pretreatment tank provided with the waste lubricating oil and a heating jacket provided on an outer surface of the pretreatment tank to supply heat to the pretreatment tank to maintain the temperature of the waste lubricating oil at 30 ° C to 45 ° C, And a first nitrogen gas tank for injecting nitrogen gas into the interior of the pretreatment tank,
The temperature of the oil in the oil storing step is 70 to 80 DEG C, the temperature of the oil in the oil replenishing step is 82 to 85 DEG C,
Wherein the oil in the aging tank in the aging step is 20 wt% to 25 wt%, the new water-soluble lubricant oil is 75 wt% to 80 wt%
Wherein the waste lubricating oil is stored in the pretreatment tank and aged at a temperature of 40 DEG C for one day in the pretreatment step. The method according to claim 1,
In the pretreatment step, the pretreatment tank receives the waste lubricating oil through a pretreatment tank, holds the waste lubricating oil in the pretreatment tank for one day,
The waste lubricating oil stored in the pretreatment tank prevents oxidation and deterioration of the waste lubricating oil by the nitrogen gas injected from the first nitrogen gas tank, and the production of environmentally friendly water-soluble lubricating oil maintained at 30 ° C to 45 ° C by the heating jacket Way. The method according to claim 1,
The two-phase separator includes a separation tank provided to rotate around a vertical rotation axis to separate particulate matter, which is a contaminant, into waste lubricant oil and discharge the separated particulate matter, and a centrifugal separator arranged to rotate around the vertical rotation axis, And a screw conveyor rotating at a speed different from that of the separation tank,
Wherein the separation tank is provided with a cylindrical upper portion and a conical lower portion, the upper portion and the lower portion being connected to each other by a screw conveyor provided in the separation tank,
A heater is provided on the outer surface of the upper portion of the separation tank to maintain the temperature of the waste lubricating oil transferred to the upper portion of the separation tank at 30 ° C to 45 ° C,
Wherein the heater maintains the temperature of the waste lubricating oil stored in the upper portion of the separation tank at 40 占 폚. The method of claim 3,
In the pretreatment step, the waste lubricating oil transferred from the pretreatment tank is introduced into the upper part of the separating tank rotating with the magnetic nanoparticles, and the centrifugal force generated in the separation tank causes the particulate matter and the magnetic nanoparticles Is separated from the liquid material, which is oil,
The liquid material is delivered to the filtration unit, and the granular material and the magnetic nanoparticles are discharged through an outlet separate from the liquid material,
Wherein the magnetic nanoparticles are insoluble in the liquid material and are bound to the surface through a surface chemical bonding with the particulate material, so that a ligand containing an ammonium group is bonded to the surface. The method according to claim 1,
In the filtration step, the filtration part includes a front end, a sheave, and a rear end, the inside of which has a hollow tubular shape so that the liquid material discharged from the two-phase separator can pass therethrough,
Wherein the front end portion and the rear end portion are conical in shape and the sheave is made of a stainless steel mesh-like plate,
Wherein the sheave has an area equal to the area of the inlet and the area of the outlet of the rear end of the front end, and the sheave has an area of 30% to 50%
And a plurality of deformers provided on the inner surface of the front end portion along the flow of the liquid material at the front end so as to guide the flow of the liquid material and disaggregate the granular material,
Wherein the front end portion is provided with a discharge port for discharging the particulate matter to the outside at a portion adjacent to the sheave. The method according to claim 1,
In the reaction step, the reaction tank has a cylindrical shape extending in one direction and into which a liquid material transferred from the filtration unit flows. The reaction tank is provided inside the reaction tank, and the liquid material is rotated at a speed of 45 to 55 cm / And a screw stirrer for stirring the liquid material,
Wherein the screw agitator comprises a shaft extending from one end of the reaction tank to the other end and a helical blade connected to the shaft,
A plurality of heating ribs extending from the inside of the reaction tank to extend between the helical blades are provided at upper and lower portions of the reaction tank, and an eco-friendly water-soluble lubricant oil ≪ / RTI > The method according to claim 1,
In the separating step, the liquid droplets aggregated by the oil droplets transferred through the fourth nozzle of the reaction tank are stagnated, the temperature in the separating tank is maintained at 30 ° C, To separate the water and the oil,
Further comprising the step of re-supplying the oil separated in the separating tank to the reaction tank, wherein the separated oil to be re-supplied is 32 to 35% of the volume of the liquid substance contained in the reaction tank. The method according to claim 1,
Wherein the aging tank is provided with an agitating part provided in the aging tank for mixing the oil and the new water-soluble lubricant oil, and a bottom heater for supplying heat to the inside of the aging tank is provided on the bottom surface of the aging tank,
An additive hopper connected to an upper portion of the aging tank to deliver the additive into the aging tank, and a second nitrogen gas tank for introducing nitrogen gas into the aging tank,
Wherein the agitating part is provided with a shaft having one end connected to the additive hopper at the upper part of the aging tank and rotating in the form of an empty tube, and a plurality of impellers connected at the other end of the shaft,
Wherein one end and the other end of the shaft are open, and an additive provided in the additive hopper flows into one end of the shaft, the additive is introduced into the aging tank at the other end of the shaft,
A valve is provided at a portion where the additive hopper and the shaft are connected to control the flow of the additive, and a sensor for measuring an amount of the additive in the additive hopper is provided, and the sensor and the valve are connected to the controller ,
Wherein the control unit controls the amount of the additive transferred to the aging tank by controlling the on / off of the valve according to the amount of the additive measured by the sensor. The method according to claim 1,
Wherein the oil reservoir comprises a storage tank for storing the oil and a first heating jacket provided on the outer surface of the storage tank for applying heat to the oil,
Wherein the oil replenishing tank comprises a replenishing tank for storing the new water-soluble lubricant oil, and a second heating jacket provided on the outer surface of the replenishing tank for applying heat to the new water-
Wherein the temperature of the second heating jacket is higher than the temperature of the first heating jacket, the temperature of the oil in the oil storing step is 70 ° C to 80 ° C, the temperature of the oil in the oil replenishing step is 82 ° C 85 < 0 > C.

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