KR101611142B1 - Waste Oil Reproducing Apparatus And Method Using Vacuum Distillation - Google Patents

Abstract

A waste oil recycling apparatus using a reduced-pressure distillation according to the present invention comprises a pretreatment filter for filtering a raw material, and a sludge adsorbing the activated carbon on the contaminants contained in the raw material by adding activated carbon to the raw material and heating and stirring, A condenser for cooling and condensing the contaminants decompressed and distilled in the reaction tank, a condenser for condensing the contaminants distilled in the reaction tank, and a condenser for condensing the contaminants to the condenser through a decompression pump tube A decompression pump for decompressing and pressurizing atmospheric pressure of the reaction vessel and the condenser and the decompression pump tube according to valve control; and a plurality of separators for separating the sludge from the mixture of the raw material and the sludge transferred from the reaction vessel And a post-processing filter.
According to the waste oil regeneration apparatus using the reduced pressure distillation according to the present invention, since a plurality of post-treatment filters are further provided in addition to the pre-treatment filter, superior quality of the regeneration oil can be expected compared with the waste oil regeneration apparatus or method using the existing reduced- A plurality of feedback branch tube assemblies are provided on the side of the reduced pressure pump tube in the step of increasing the reduced pressure environment formed in the inner tank, the condenser and the reduced pressure pump tube to atmospheric pressure, thereby remarkably shortening the time required for the pressure increase, It is possible to prevent the backflow of contaminants caused by the water.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a waste oil recycling apparatus,

The present invention relates to an apparatus and a method for regenerating waste lubricating oil for a pump used in semiconductor processing and other industrial fields, and is capable of preventing cracking of waste oil under a stable environment by reducing the pressure and effectively separating moisture and foreign matter It provides a function that can do.

Typical waste oil regeneration methods include waste oil purification using pyrolysis. However, such a pyrolysis refining method generates a large amount of waste such as chlorine gas and tar and coke, thereby posing a risk of environmental pollution and a burden of disposal.

In addition, there is ion purification method by other waste oil regeneration method. Ion refining method is a method in which foreign substances such as heavy metals contained in waste oil are reacted with anionic chemicals to generate metal salts and physically separate them. However, the ion purification method has a limitation in reuse because the product contains a lot of ash.

In order to solve such a problem, Korean Patent No. 10-0592856 entitled " Method for manufacturing clean fuel oil using waste oil " The present invention relates to a method for producing a clean fuel oil using waste oil collected by collecting low-viscosity waste lubricating oil and various kinds of waste hard oil in waste oil, which is designated waste, by item and feature and treating it with high-grade clean fuel through inorganic ceramic catalyst treatment, A sedimentation step of removing sediment and moisture contained in the waste oil by natural sedimentation; A pretreatment step of transferring the waste oil excluding the sediment precipitated in the lower part of the sedimentation step to a pretreatment tank, removing water using a vacuum system and adjusting the pH of waste oil to neutral; A catalyst treatment step of heating the waste oil subjected to the pre-treatment step to a temperature of 70 to 80 ° C and simultaneously introducing the catalyst to stir the catalyst and the waste oil; A filtration step of filtering the waste oil having undergone the catalyst treatment step at a temperature of 70 to 80 ° C by utilizing a microfiltration system of 0.5 to 5 μm; The present invention also provides a method for manufacturing a clean fuel oil using waste oil, comprising the steps of: performing a filtration process on a finished product with a color degree, a reaction test, and the like. However, the present invention has a limitation that the waste oil used for regeneration must have a low viscosity, and there is a disadvantage that the regeneration efficiency is low due to the long process time.

Korean Patent No. 10-1325156 entitled " Waste Oil Recovery Apparatus " The present invention reduces the time required to heat the waste oil to a temperature required for evaporation by raising the thermal efficiency by directly heating the waste oil while forming the waste oil into a thin film and improves the evaporation rate. The droplets formed on the wall of the evaporation chamber are recovered and discharged to the vapor treatment unit, Which is compact and has a simple structure, comprises: a waste oil supply unit for supplying waste oil; An evaporation unit for directly heating and vaporizing the waste oil supplied from the waste oil supply unit while being thinned; A vapor processing unit for condensing and processing vapor vaporized and discharged by the evaporation unit; A vacuum unit for forming a predetermined vacuum pressure on the evaporation unit and the vapor processing unit; And a droplet collection unit which collects droplets which are not discharged by the condensation phenomenon in the evaporation unit and exist in a liquid state on the wall of the evaporation chamber, and collect the droplets in the vapor processing unit. In the present invention, oil is formed into a thin film through a rotating plate and distilled, and there is no separate adsorption process and filtration process, so that the quality of the reclaimed oil is doubtful. In addition, there is a limitation in the volume of raw materials to be processed per hour, and in order to overcome the problem, the volume of the apparatus must be increased.

Accordingly, there is a need for an invention for improving convenience by evaporating moisture and various impurities by making distillation through depressurization more efficient by compensating for the above problems.

SUMMARY OF THE INVENTION The present invention has been conceived to overcome the problems of the prior art, and it is an object of the present invention to provide a pretreatment filter for filtering a raw material, a reaction tank for heating and stirring the raw material and activated carbon and evaporating the raw material by distillation under reduced pressure, A regenerator, a decompression pump for decompressing or boosting the pressure of the decompression pump tube, and a plurality of post-treatment filters for separating the mixture of the raw material and the sludge to filter the raw material, comprising: a condenser for cooling and condensing contaminants; To make waste oil recovery more efficient.

Another object of the present invention is to provide a condenser in which a plurality of vertical fins protrude from an inner hollow portion of a tube so that the reduced pressure distilled contaminant can be rapidly cooled and condensed in the condenser and recovered .

It is a further object of the present invention to provide a method of reducing the pressure in the apparatus by reducing the pressure in the apparatus to atmospheric pressure by providing a plurality of feedback branch pipes on one side of the pressure reducing pump tube to prevent sudden pressure- .

It is a further object of the present invention to provide a controller for sequentially and differentially controlling the feedback branch pipe, wherein the controller controls the step-up step by stepwise controlling the step-by-step pressure increase step.

In order to achieve the above object, a waste oil recycling apparatus and method using a reduced pressure distillation according to the present invention comprises: a pretreatment filter for filtering a raw material; and an adsorbent for adsorbing contaminants contained in the raw material by adding activated carbon to the raw material, A condenser for cooling and condensing the contaminants decompressed and distilled in the reaction tank, a condenser for condensing the condensed substance in the reaction tank, a condenser for condensing the condensed substance in the condenser, A decompression pump connected to the condenser through a decompression pump tube for performing a decompression process and an atmospheric pressure step-up process on the reaction tank, the condenser and the decompression pump tube according to a valve control, and a decompression pump for decompressing the raw material and the sludge Comprising a plurality of post-treatment filters for separating said sludge from the mixture It characterized.

The condenser includes a tube having a plurality of hollow tubes extending along the longitudinal direction of the condenser and condensing the contaminants. The tubes are protruded at a predetermined interval along the inner circumferential surface of the hollow tube, And a plurality of fins extending along the longitudinal direction of the tube.

The waste oil recycling apparatus further includes a first feedback branch pipe extending from a portion of the condenser to which the decompression pump tube is connected and connected to a first connection portion of the decompression pump tube; A second feedback branch tube extending from a side of the first feedback branch tube and connected to a second connection site of the vacuum pump tube; A branch tube assembly including a third feedback branch tube; A check valve mounted on the extension start portion and the end portion of the first, second, and third feedback branch tubes, respectively; And a pressure gauge formed on one side of the extension start portion of the first, second, and third feedback branch tubes, respectively, for measuring pressures of the first, second, and third feedback branch tubes.

The waste oil regenerating apparatus may further include a controller for controlling the differential opening and closing of each of the check valves in accordance with the pressure measured by the pressure gauge.

In addition, a waste oil recycling method using reduced pressure distillation is characterized by comprising: a pretreatment step of filtering the raw material by filtration; and a step of adding activated carbon to the raw material, heating and stirring the activated carbon to produce sludge adsorbing the activated carbon on the contaminants contained in the raw material A vacuum distillation step of subjecting the contaminants contained in the raw material to a vacuum distillation process by a reaction step, a driving of a decompression pump, and a heat treatment of a reaction tank; and a condensation step of cooling and condensing the reduced- And a filtering step of separating the sludge from the mixture of the raw material and the sludge transferred from the reaction tank through a plurality of filters.

In addition, the method further includes an atmospheric pressure step-up step of reducing the pressure of the reaction tank, the condenser, and the vacuum pump tube to an atmospheric pressure environment by valve control of the vacuum pump after the vacuum distillation step, A first feedback step of causing the controller to open the start valve and the end valve of the first feedback branch tube by reaching the first pressure, and a second feedback branch step of, when the controller reaches the second feedback branch by reaching the second pressure higher than the first pressure, A third boosting step of opening the start valve and the ending valve of the third feedback branch pipe by reaching a third pressure which is closer to atmospheric pressure than the second pressure, The pressure in the reaction tank and the condenser and the pressure reducing pump tube is controlled by a differential control Thereby providing a function of preventing the reverse flow of the reduced-pressure distillation-treated contaminant which may be generated by a sudden increase in pressure.

An apparatus and method for recovering waste oil using a reduced pressure distillation according to the present invention,

1) In addition to the pretreatment filter, it further includes a plurality of post-treatment filters. In addition to the step of reacting and adsorbing the activated carbon with the contaminants, the step of decompressing the contaminants includes the step of regenerating Excellent quality can be expected,

2) a condenser which is made of a shell and a tube for cooling and condensing through heat exchange, and having a fin formed in the tube in the longitudinal direction of the tube through which the reduced-pressure distilled contaminant passes, promotes cooling and condensation by heat exchange Speed recovery of contaminants,

3) In the atmospheric pressure step-up step of increasing the pressure reducing environment of the reaction vessel, the condenser and the vacuum pump tube in the apparatus to atmospheric pressure, a plurality of feedback branch tube assemblies are provided on the side of the vacuum pump tube, And a function to prevent backflow of contaminants due to a sudden increase in pressure is provided,

4) It is possible to stably control the feedback branch pipe to the atmospheric pressure by providing a step of performing differential control so that the controller properly opens and closes at each step-up step.

1 is a flowchart showing a method of recovering waste oil using a reduced pressure distillation according to the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a waste oil recycling apparatus,
3 is a sectional view showing a cross section of a reaction tank of the present invention.
4 is a conceptual diagram showing a feedback branch pipe included in the vacuum pump tube of the present invention.
5 is a cross-sectional view showing a cross section of a condenser and a recovery container of the present invention, and a partially enlarged view showing a cross section of a condenser.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale and wherein like reference numerals in the various drawings refer to like elements.

The waste oil regeneration method according to the present invention is a physical treatment method using a filtration process using various kinds of filters and a vacuum distillation process. The present invention can improve the yield of refined and regenerated waste oil and at the same time improve the quality by making it possible to perform refining through distillation in a temperature range in which thermal decomposition of the waste oil does not occur and at the time of pyrolysis or atmospheric distillation Thereby saving heat energy required.

The apparatus for regenerating waste oil according to the present invention further includes a vertical pin 421 inside a tube 420 constituting a condenser 400 for condensing distilled water and foreign matter to cool and condense moisture and foreign matter, The present invention provides a function of suppressing reverse flow of moisture and foreign substances due to abrupt pressure increase by providing a plurality of feedback branch pipes in the process of increasing the pressure from the reduced pressure state to the atmospheric pressure.

FIG. 1 is a flowchart showing a waste oil recycling method using a reduced pressure distillation according to the present invention, and FIG. 2 is a configuration diagram showing an embodiment of a waste oil recycling apparatus using a reduced pressure distillation according to the present invention.

1 and 2, the waste oil recycling method using the reduced-pressure distillation according to the present invention comprises a waste oil transfer step S100, a pretreatment step S200, an activated carbon reaction step S300, a vacuum distillation step S400, A condensation recovery step S600, a filtration step S700, a quality control and a re-injection step S800. The apparatuses and methods constituting each step will be described in detail as follows.

1. Waste oil transfer step (S100)

In the present invention, waste oil mainly comprises fluorinated lubricant and an oil composed of the chemical species. The fluorine-based oil is characterized by its oxidation resistance which is incombustible and stable to oxygen, and its chemical resistance which is insoluble in other organic solvents except for fluorine-based solvent, extremely stable to strong acid, strong alkali, halide and other water-insoluble in water do. Depending on the above characteristics, fluorine-based oil is used in pumps and lubrication used in semiconductor processes, pumps and valves for oxygen-handling equipment, magnetic disks and electrical contact parts in various precision fields.

The waste oil that has been discarded due to problems such as denaturation and impurities is recovered and transported and is provided in the raw material tank 100 as a raw material. The prepared raw materials firstly detect large contaminants through visual sensory tests, and then are input to the pretreatment filter 200 through the raw material input pump 1. The raw material input pump 1 for performing the input may further include a bypass pipe for reducing the load, and the passing pressure of the pump can be adjusted by operating the bypass valve. At this time, the pressure is preferably set to 500L to 600L per hour.

According to the waste oil transfer step S100, the user first visually checks the transported waste oil to see whether or not there is foreign matter of a large particle which can not be processed in the apparatus, and inputs the raw material into the stock tank 100. [ Then, the raw material feed pump 1 connected to the tank feeds the raw material to the pretreatment step S200. If the raw material tank 100 is excluded, it is also possible to provide the raw material as a unit of an oil sump or drum unit capable of transporting the raw material, and directly feed the raw material to the pump through a corrugated pipe or the like.

2. Pre-processing step (S200)

The preprocessing step (S200) is a filtering process for primarily filtering the moisture of the raw material and foreign matter having a relatively large particle size, and is performed in a pretreatment filter (200) including a pretreatment filter. As the pretreatment filter, a filter having a mesh size of 10 μm to 30 μm and capable of separating oil and moisture can be applied. Wind filters having excellent filtration area and filtration pressure can be used as the types of filters according to the structure. In the pretreatment filter 200, a pressure gauge is provided to maintain the highest filtration efficiency. When the pressure of the filter becomes 4 Kg / cm ² or more, the filter is replaced to perform the rework. The pretreatment filter 200 may be provided with a bypass line for the exchange and partial maintenance of such a filter.

The pre-processed raw material is transferred to the reaction tank 300. At this time, the raw material flows through the flow meter (2) while maintaining a proper flow rate according to the treatment state of the reaction tank (300). It is preferable that the flow meter 2 includes a flow meter 2 that uses a volumetric formula specialized for measuring the flow rate of a gas and a liquid having many kinds, such as an area type, a volumetric type, and an electronic type.

3. Activated carbon reaction step (S300)

3 is a cross-sectional view showing a cross section of the reaction tank of the present invention.

The pretreated raw material is introduced into the reaction tank 300 through the reaction tank feed pipe 10. The reaction tank 300 is a tank in which water and foreign substances are adsorbed on activated carbon to form sludge and separation of raw materials and contaminants by using vacuum distillation. The tank 300 is equipped with a stirrer 330 having a motor 331 and a heating unit 320 .

The agitator 330 for agitating the raw material at a proper rate during the activated carbon reaction and the vacuum distillation process comprises a motor 331 which is a power source located outside the reaction tank and an impeller 332 which is an operating part located inside the reaction tank.

The impeller 332, also referred to as a wing, can take many forms, such as a row, a propeller, a screw, or a turbine. Although the impeller 332 is shown as a propeller type in the drawings, the impeller 332 is not limited to the propeller type. However, the impeller 332 is not limited to the propeller type, The turbine type impeller 332 can be changed to suit the situation.

The reaction tank 300 may include a temperature sensing controller (TIC) for temperature sensing and heater control. This TIC serves to maintain the proper temperature at various stages in the reactor. First, the activated carbon reaction step (S300) may include a step of raising the raw material to a temperature favorable for the reaction and stirring the raw material for a predetermined time before injecting the activated carbon. At this time, the temperature environment is 50 to 70 ° C, the rotation speed of the stirrer 330 is 50 rpm to 70 rpm, and the stirring time is 20 to 30 minutes. This is to fix the starting temperature within the necessary range and to make the raw material uniform to increase the efficiency of the impurity removal reaction using activated carbon.

The heating unit 320 for providing the temperature control function of the reaction tank 300 may be composed of a plurality of heaters and temperature sensors so that individual heating of the respective compartments within the reaction tank 300 is possible. In other words, the plurality of heating units 320 are formed at a predetermined distance from the outside of the reaction tank 300 along the longitudinal direction so as to uniformly heat the respective compartments, and thus the temperature of the entire reaction tank 300 becomes equal, It is possible to provide a function of maintaining uniformity. For example, when the heating unit 320 is provided along the circumference of the upper, middle, and lower sides of the reaction tank 300, energy can be reduced by partially operating the heater according to the amount of the raw material in the reaction tank 300, If necessary, the temperature of the lower part may be made higher than the upper part of the temperature within the allowable range, so that indirect stirring of the raw material through the convection can be achieved.

In addition, the reaction tank 300 may further include a baffle 350 protruding inwardly from the inside so as to interfere with the rotation of the liquid, thereby increasing the stirring efficiency.

Activated carbon is introduced into the raw material after preparation of activated carbon agitation through the activated carbon inlet port 340 provided at the upper end of the reaction tank 300, and agitation is performed under a predetermined condition. Activated carbon directly injected into the reaction tank 300 through the activated carbon inlet port 340 is adsorbed with contaminants and moisture in the reaction tank 300 to form sludge. The composition of the activated carbon is dependent on the chemical properties of the raw materials and the purpose And may vary depending on the composition of the impurities. It is preferable that the activated carbon is provided in powder form for effective adsorption. In order to increase adsorption of activated carbon to polar pollutants, it is also possible to use activated carbon modified by oxidation reaction.

The amount of activated carbon may be varied depending on the contamination degree of the raw material and the water-containing state. The range is from 0.1 wt% to 0.5 wt% based on the weight of the input raw material. The activated carbon reaction step (S300) is carried out at a temperature of 60 ° C for about 2 hours while stirring at a speed of 120 rpm to 160 rpm.

In this activated carbon reaction step (S300), the temperature environment should subsequently be controlled in consideration of the reduced pressure distillation to be performed. When the inside of the reaction tank 300 is decompressed, pyrolysis of the raw material may occur even at a low temperature. If pyrolysis occurs, the molecular weight of the raw material may be lowered and the viscosity may be changed to cause degradation of the quality of the reclaimed oil.

4. The reduced pressure distillation step (S400)

A vacuum environment is created by driving the decompression pump 600 connected to the chemical reaction tank 300 through the condenser transfer pipe 20 and the condenser 400 and the decompression pump pipe 30. Referring to FIG. 2 again, the vacuum level of the reaction tank 300 is maintained and adjusted by a pressure transmitter (PT) and a pressure reducing valve 34 that control the vacuum pump 600. PT and the pressure reducing valve 34 and the damper may be provided in the pressure reducing pump pipe 30 connecting the condenser 400 and the pressure reducing pump 600. [ That is, when the decompression pump 600 is operated, the pressure inside the apparatus is released through the decompression pump tube 30, and at this time, the air in the reaction tank 300 is also supplied to the condenser transfer pipe 20, Pressure pump tube 30, so that the inside of the apparatus is depressurized as a whole.

The depressurization distillation in the reaction tank 300 includes a first depressurization step (S401), a second depressurization step (S402), and a third depressurization step (S402) for stepwise controlling the temperature and the pressure for more intensive distillation of moisture and foreign substances (S403), and a filtration preparation step (S404) to go to the filtration step.

4-1. The first pressure reducing step (S401)

After the completion of the activated carbon reaction step S300, the speed of the stirrer 330 is maintained at 40 rpm to 90 rpm, which is relatively lower than that of the activated carbon reaction step S300. The temperature of the reaction tank 300 is maintained at the same temperature and the pressure is maintained at 25 Torr to 45 Torr The water and the decomposition material mixed in the raw material are distilled and conveyed to the condenser 400 for 20 minutes. More preferably, the stirring speed of the first pressure reducing step (S401) is 50 rpm to 80 rpm, and the pressure is preferably 30 Torr to 40 Torr.

4-2. The second pressure reducing step (S402)

The temperature of the reaction tank 300 is raised to 65 to 85 ° C while the speed of the stirrer 330 is maintained after the first depressurization step S401 and the pressure is reduced to 5 Torr to 30 Torr for 10 to 20 minutes, And distillation is carried out to the condenser 400. The condenser 400 is provided with a condenser 400 for condensing the condensed water. Preferably, the temperature in the step is set at 70 to 80 DEG C and the pressure is set to 10 to 20 Torr.

4-3. In the third pressure reducing step (S403)

After the completion of the second depressurization step (S402), the temperature of the reaction tank 300 is raised to about 80 DEG C to 90 DEG C, which is raised by about 10 DEG C, and the vacuum pressure is maintained at 1 Torr to 0.1 Torr. And transfers the remaining decomposition material and foreign matter to the condenser 400.

By performing the vacuum distillation stepwise as described above, it is possible to intensively distill off the water and foreign substances corresponding to each step. In addition, the rapid pressure drop and the temperature rise can cause the raw material to boil overheat. Such stepwise depressurization can prevent the overheat. The non-vaporized raw material including the sludge is conveyed to the respective filtration steps S700 through the filter conveying pipe 50 by the filter conveying pump 3 from the lower part of the reaction tank 300 after the subsequent preparation of the filtration step S404 do.

4-4. In the filtration preparation step (S404)

It is preferable to cool the raw material from which moisture and foreign substances have been removed through the reduced pressure distillation to 60 ° C or lower prior to filtration. If the temperature of the raw material is higher than 60 ° C, the fine contaminants may easily pass through the filter, and the filter may be easily damaged, shortening the service life. For this reason, it is more preferable to cool the raw material from 50 占 폚 to 55 占 폚.

In this cooling process, unnecessary time can be saved by passing the raw material through the cooler 310 in the filtration preparation step (S404). The cooler 310 can use a separate coolant, and it is possible to increase the energy efficiency by using the coolant supplied from the coolant supplier 430, which will be described later, as a coolant.

5. Atmospheric pressure step-up step (S500)

4 is a conceptual diagram showing a feedback branch pipe provided in the decompression pump tube 30 of the present invention.

When the raw material and the sludge are transferred to the filtration step S700 while the inside of the reaction tank 300 in which the reaction has been completed is in a vacuum pressure state, the filtration efficiency in the filtration step is lowered, . However, when the pressure increase is performed in parallel with the filtration step S700, the life of the filter used in the filter provided in the filtration step S700 is shortened due to the pressure difference, and the filter structure may be physically deformed, It may not be possible to filter the impurities of the water. Therefore, the booster process precedes the first filtration step (S701) after the decompression distillation step (S400) is completed.

The atmospheric pressure step-up step S500 can be started by opening the pressure reducing valve 34 provided in the depressurization pump tube 30, and is generally performed with a damper and a valve so as not to suddenly proceed. However, there is a disadvantage that unnecessary time is consumed in this process. If the pressure rises rapidly, the steam and the condensate flow backward along the condenser transfer pipe 20 due to the atmosphere entering the condenser 400 through the decompression pump pipe 30, have. If such a case occurs, the foreign matter may enter the reaction tank 300 again, and the quality of the regenerated oil may be deteriorated. Therefore, the general boosting process is performed very carefully and gradually to prevent the backflow of the external atmosphere and the steam inside the device through the pressure reducing valve 34, so that the reduction rate of the pressure in the device to the atmospheric pressure level is inevitably lowered. Which means that the completion of the entire process is delayed and the efficiency per hour is reduced.

As shown in FIG. 4, there is a method of solving the above problem by providing a multi-stage feedback branch line for preventing the backflow of the decompression pump tube 30 near the condenser 400 side.

More specifically, when the damper is provided in the condenser transfer pipe 20 or the decompression pump pipe 30 to prevent the steam backflow due to the full pressure increase, the damper is finally decompressed in the third decompressing step (S403) It is probable that it can not withstand the reverse load of 0.1 Torr. However, the waste oil recycling apparatus using the reduced-pressure distillation according to the present invention includes a feedback branch assembly composed of a plurality of feedback branch tubes on the side of the reduced pressure pump tube 30 and two check valves And a pressure gauge provided in each of the feedback branch pipes.

The first feedback branch pipe 31 is extended near the condenser 400 and the reduced pressure pump pipe 30 and connected to the reduced pressure pump pipe 30, Which is one side of the first connection part. The feedback branch tube assembly further includes a second feedback branch pipe 31 branched from the condenser 400 side of the first feedback branch pipe 31 and connected to a second connection portion formed near the first connection portion of the reduced pressure pump pipe 30, Branch pipe 32 and further branches near the branch point of the second feedback branch pipe to extend to the third connection portion formed near the first connection portion and the second connection portion of the decompression pump tube 30 It is also possible to provide a third feedback branch pipe 33 connected thereto.

The two check valves located at both ends of the first feedback branch pipe 31 constitute a first valve assembly 31a and the second feedback branch pipe 31 The two check valves located at both ends of the third feedback branch pipe 33 constitute a third valve assembly 33a.

In addition, the feedback branch tubes constituting the feedback branch tube assembly are provided with respective pressure gauges for differential control according to the pressure. In addition, in order to stably increase the pressure in the reaction tank 300 and the condenser 400 through the feedback branch pipe, it is preferable that a controller for receiving differential signals from the respective pressure gauges and performing differential control on the respective valve assemblies is provided.

The operation of the feedback branch pipe during the atmospheric pressure increase by the above-described configuration will now be described.

5-1. In the first step-up step (S501)

When the decompression valve 34 provided in the decompression pump tube 30 is opened, the pressure in the apparatus is entirely boosted. At this time, if the pressure gauge provided in the first feedback branch pipe 31 is checked and the first pressure reaches a previously calculated pressure so that the reduced-pressure distilled contaminant in the condenser 400 may not flow backward, The assembly 31a is opened and the pressure applied to the condenser 400 due to the pressure increase is fed back and dispersed to the reduced pressure pump pipe 30 through the first feedback branch pipe 31. [

5-2. In the second step-up step (S502)

When the pressure due to the back-flow atmosphere indicated by the pressure gauge provided in the first feedback branch pipe 31 is not completely eliminated and reaches a previously calculated second pressure, the feedback controller opens the second check valve, The branch pipe 32 is opened and the pressure of the first feedback branch pipe 31 is fed back and dispersed to the reduced pressure pump pipe 30. [

5-3. The third boosting step (S503)

The feedback controller opens the third check valve and the third feedback branch pipe 33 is connected to the second feedback branch pipe (not shown) 32 are fed back to the decompression pump tube 30.

As described above, the feedback branch tube assembly and the atmospheric pressure step-up step S500 can smoothly control the rise of the pressure to prevent backflow that may occur in the decompression pump tube 30, the condenser 400 and the condenser transfer tube 20 . After the inside of the apparatus is elevated to the atmospheric pressure level, the raw material and the sludge of the reaction tank 300 are introduced into the filtration step S700 through the filter transfer pump 3.

6. Condensation recovery step (S600)

5 is a schematic view showing a cross section of a condenser and a recovery container of the present invention and a partially enlarged view showing a cross section of a condenser.

In the vacuum distillation step (S400), the vaporized moisture and the decomposition material, that is, the vapor, are transferred to the condenser (400) through the condenser transfer pipe (20). The steam is recovered to the recovery vessel 500 as a condensate after the condensation recovery step S600 and is discharged to the outside of the apparatus through the condensate discharge pipe 40 by the condensate discharge pump 4 after completion of the process. The condensate may be discarded without any further re-processing, but since many raw materials are mixed and distilled together with moisture and foreign substances in the reduced-pressure distillation step (S400) in which steam is generated, the re-process can be performed through a component test if necessary.

As the detailed steps included in the reduced pressure distillation step (S400) are completed, the steam is transferred to the condenser (400) through the condenser transfer pipe (20) to be cooled and condensed. The chilled water flowing from the cooling water inflow pipe 70 flows into the shell 410 and the steam that has undergone the decompression and distillation flows into the tube 420. In this case, Is passed. The gaseous vapor passes through this structure and is cooled and condensed before being conveyed to the recovery vessel 500 as liquid condensate.

The tube 420, which is condensed as the steam passes, is capable of having a special internal structure to enhance the efficiency of condensation. 4, the tube 420 may include a plurality of fins 421 protruding from the inner wall toward the center of the tube 420. As shown in FIG. These pins 421 may be continuous in the longitudinal direction of the tube 420 and may be formed at regular intervals along the inner circumferential surface of the tube 420.

This internal structure enhances the surface area of the tube 420 through which steam having a low thermal conductivity is passed to facilitate rapid condensation of the steam. Further, since the shape of the fin 421 is directed downward where the recovery container 500 is located, Allowing the condensed condensate to be quickly recovered.

The condenser 400 may include a water chiller 430 to receive the cooling water, and the temperature of the cooling water is preferably 5 ° C to 12 ° C. The cooling water supplier 430 may include a separate stirrer to increase the cooling efficiency. As described above, a part of the cooling water cooled in the cooling water supplier 430 proceeds from the reduced pressure distillation step S400 to the filtration step S700, and is used as a coolant for the cooler 310 constituting a constant temperature to increase the thermal efficiency have.

The condensate contained in the recovery container 500 may be subjected to a separate condensate extraction process. In other words, it is possible to open a drain of the recovery vessel 500 to collect a sample, to check the composition of the condensate, and if necessary, re-work according to a separate process or a waste oil recycling method of the present invention . In this way, the condensate recovery step provides an effect of maximizing the regeneration efficiency of the raw material through the rework process.

7. Filtration step (S700)

Referring again to FIG. 2, the filtration step S700 is based on the use of a single wind filter, but preferably includes subsequent secondary and tertiary additional filtration steps to better isolate the sludge It is possible to obtain the raw material.

7-1. In the first filtering step (S701)

In the primary filtration step S701, the raw material is conveyed to the first filter 710 by the filter conveying pump 3 in the reaction tank 300 and proceeds simultaneously. The first filter 710 may include a wind filter having a mesh size of 5 占 퐉 to 10 占 퐉, and it is preferable that a pressure gauge is provided so that the operating pressure does not exceed 0.3 MPa. In the first filter 710, a large amount of sludge is filtered and discharged to the drain, and the primary filtered material is transferred to the second filter 720.

7-2. In the secondary filtration step (S702)

The second filter 720, which carries out the second filtering step S702, may include a filter having a mesh size of 1 탆 to 3 탆, preferably a pressure gauge to maintain a pressure of 0.2 to 0.3 MPa It is good. If the filtration operating pressure exceeds 0.3 MPa, it is time to replace the filter. The filter used in the second filter 720 may be a wind filter like the first filter 710. The sludge of a slightly smaller particle is also discharged at the drain of the second filter 720, and the secondary filtered material is transferred to the third filter 730.

7-3. In the tertiary filtration step (S703)

The third filter 730 in which the tertiary filtering step S703 is performed uses a filter having a mesh size of 0.4 mu m to 0.6 mu m. A glass fiber filter can be used as the filter having such a performance. Similarly, it is preferable that the third filter 730 is also provided with a pressure gauge so that the operating pressure is maintained at 2 kg / cm ³ or less.

The sludge produced in the activated carbon reaction step (S300) is removed by the intensive filtration at each step of the filtration step (S700), and the raw material is transferred to the storage tank (800) by the regeneration flow passage and the storage tank transfer pipe (60) .

8. Quality control and re-input step (S800)

The regeneration oil stored in the storage tank 800 is subjected to a process of confirming whether it meets the quality standard through several tests. The test may include a sample port in the storage tank 800 to sample and inspect the sample, and may have a light sensor and a viscosity sensor directly in the first tank. In other words, the chemical resistance, corrosion resistance and heat resistance test are performed through sample test, and the transparency and viscosity analyzed by the sensor are compared with data of the product of the same component to determine the quality of the reclaimed oil. It is possible to build a system that re-enters the middle stage. If the difference in color between the new product and the new product is small, the process may be fed back to the filtering step S700. If the difference in color between the new product and the new product is small, the process may be repeated from the pre- It is also possible.

As described above, the waste oil regeneration method and the regeneration apparatus using the reduced-pressure distillation according to the present invention are described in the above description and drawings, but the present invention is not limited to the above description and drawings, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

S100: waste oil transferring step S200: pre-processing step
S300: Activated carbon reaction step S400: Vacuum distillation step
S401: First pressure reducing step S402: Second pressure reducing step
S403: Third pressure step S404: Filtration preparation step
S500: Atmospheric pressure step-up step S501: First step-up step
S502: Second boost step S503: Third boost step
S600: Condensation recovery step S700: Filtration step
S701: Primary filtration step S702: Secondary filtration step
S703: tertiary filtration step S800: quality control and re-injection step
1: Feed pump 2: Flow meter
3: Filter transfer pump 4: Condensate discharge pump
10: Reactor feed pipe 20: Condenser feed pipe
30: decompression pump tube 31: first feedback branch tube
31a: first valve assembly 32: second feedback branch tube
32a: second valve assembly 33: third feedback branch tube
33a: third valve assembly 34: pressure reducing valve
40: Condensate discharge pipe 50: Filter transfer pipe
60: Storage tank transfer pipe 70: Cooling water inlet pipe
100: raw material tank 200: pretreatment filter
300: Reactor 310: Cooler
320: heating unit 330: stirrer
331: motor 332: impeller
340: Activated carbon inlet port 350:
400: condenser 410: shell
420: tube 421: pin
430: Cooling water supplier 500: Collection container
600: Decompression pump 710: First filter
720: second filter 730: third filter
800: Storage tank

Claims (8)

As a waste oil recycling apparatus using a reduced pressure distillation,
A pretreatment filter for filtering the raw material,
The activated carbon is charged into the raw material, heated and stirred to generate sludge adsorbed on the activated carbon by the pollutants contained in the raw material, and the pollutant distilled by the heating of the raw material in an environment depressurized by a vacuum pump is transferred to the condenser ,
A condenser for cooling and condensing the contaminants decompressed and distilled in the reaction tank;
A decompression pump connected to the condenser through a decompression pump tube for performing a decompression process and an atmospheric pressure increasing process on the reaction tank and the condenser and the decompression pump tube according to valve control;
A plurality of post-treatment filters for separating the sludge from a mixture of the raw material and the sludge transferred from the reaction tank,
The condenser includes:
And a tube having a hollow portion extending in a longitudinal direction of the condenser to condense the contaminant,
The tube may comprise:
And a plurality of fins extending along the longitudinal direction of the tube in a state of being protruded at a predetermined interval along the inner circumferential surface of the hollow portion. The method according to claim 1,
In the reaction tank,
And a heating unit for surrounding a periphery of the outer wall of the reaction tank, the plurality of the heating units being spaced at regular intervals along the longitudinal direction of the reaction tank. delete The method according to claim 1,
In the waste oil regenerating apparatus,
A first feedback branch tube extending from a portion of the condenser opposite to the portion where the decompression pump tube is connected to the first connection portion of the decompression pump tube;
A second feedback branch tube extending from one side of the first feedback branch tube and connected to a second connection site of the vacuum pump tube,
A branch tube assembly including a third feedback branch tube extending from one side of the second feedback branch tube and connected to a third connection site of the vacuum pump tube;
A check valve mounted on the extension start portion and the end portion of the first, second, and third feedback branch tubes, respectively;
And a pressure gauge formed on one side of an extension starting portion of the first, second and third feedback branch tubes, respectively, for measuring pressures of the first, second, and third feedback branch tubes, respectively, Used waste oil regenerating device. 5. The method of claim 4,
In the waste oil regenerating apparatus,
And a controller for controlling the differential valve opening / closing control of each of the check valves in accordance with the pressure measured by the pressure gauge. As a waste oil recycling method using a reduced pressure distillation,
A pretreatment step of filtering the raw material by filtration,
An activated carbon reaction step of adding activated carbon to the raw material, heating and stirring to generate sludge adsorbed on the activated carbon on the contaminants contained in the raw material,
A vacuum distillation step of subjecting the contaminants contained in the raw material to a reduced pressure distillation process by driving the decompression pump and heat treatment of the reaction tank,
A condensing step of cooling and condensing the reduced-pressure distillation-treated contaminants through a condenser to discharge contaminants,
And a filtering step of separating the sludge from a mixture of the raw material and the sludge transferred from the reaction tank through a plurality of filters,
In the reduced-pressure distillation step,
A primary decompression step of distilling the raw material and the activated carbon at a stirring speed of 50 rpm to 80 rpm, an agitation temperature of 60 ° C to 70 ° C and a pressure of 30 Torr to 40 Torr,
A second pressure reducing step of raising the stirring temperature to 70 캜 to 80 캜 and distilling the pressure to 10 Torr to 20 Torr,
And a tertiary pressure reducing step of raising the stirring temperature to 80 to 90 占 폚 and distilling the pressure at a pressure of 1 Torr to 0.1 Torr. delete The method according to claim 6,
Wherein the filtering step comprises:
A first filtering step of separating the sludge from the mixture of the raw material and the sludge through a wind filter,
A second filtering step of subjecting the residual sludge to a second separation treatment with a wind filter in a mixture of the raw material and the sludge that has undergone the first filtering step;
And a third filtering step of subjecting the residual sludge to a third separation treatment with a glass fiber filter in a mixture of the raw material and the sludge which has undergone the first filtering step.

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