KR101721193B1 - Recycling waste oil separation system of highly concentrated and method of the same - Google Patents

Abstract

The present invention relates to a system for separating highly-concentrated recyclable waste oil and a method for separating highly-concentrated recyclable waste oil by using the same, and more specifically, to a system for separating highly-concentrated recyclable waste oil and a method for separating highly-concentrated recyclable waste oil by using the same, which produce primary waste oil from which parts of water and solids contained in waste cutting oil have been eliminated by supplying sulfuric acid and bubbles having thermal energy to the waste cutting oil, and which secondarily remove moisture and solids by centrifugally separating the primary waste oil, thereby producing highly-concentrated recyclable waste oil from the waste cutting oil. For this purpose, according to the present invention, provided is the system for separating highly-concentrated recyclable waste oil, the system comprising: a separation chamber which is configured in a lengthwise direction, in which a primary waste oil outlet is formed in an upper portion thereof, in which a treated water outlet is formed in a lower portion thereof, into which waste cutting oil is supplied and, at the same time, an acid material and bubbles having predetermined thermal energy are supplied, and which separates the waste cutting oil into primary waste oil and treated water while the waste cutting oil and the acid material are being agitated by the supplied bubbles; and a centrifugal separator which receives primary waste oil from the separation chamber, and which separates moisture, slurry and secondary waste oil by using centrifugal force.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recycling waste oil separation system,

The present invention relates to a highly concentrated waste oil recycling system and a method for separating recycled waste oil using the same. More specifically, the present invention relates to a waste recycling waste oil separating system for supplying waste oil with sulfuric acid and heat energy to waste cutting oil, The present invention relates to a highly concentrated waste oil separation system capable of producing highly concentrated waste oil from pulverized cutting oil by removing secondary moisture and solid matter by centrifuging the primary waste oil, will be.

In general, the cutting oil is composed of 20 to 80% by weight of paraffinic, naphthenic or aromatic base oil, which is mainly composed of saturated hydrocarbons, 10 to 70% by weight of water, and other additives such as fatty acids, surfactants and defoamers.

When used for processing a metal machine, such a cutting oil is used in the form of an emulsion containing a small amount of oil in a large amount of water by adding water to the cutting oil and diluting it 10 to 80 times.

On the other hand, cutting oil used in metal processing is called pulverized cutting oil, and it is occurring in various industries such as steel, machinery, petroleum refining, food, and textile industry.

Since such a pulverized cutting oil becomes a pollutant causing environmental pollution when it is discharged, it is necessary to remove the oil contained in the pulverized cutting oil and then discharge the remaining waste oil. However, the pulverized cutting oil is a state in which fine oil remains suspended in a large amount of water It is difficult to efficiently separate water and oil fractions, and since such pulmonary coolant usually has an oil content of 5 to 10 wt%, it is also difficult to perform simple incineration treatment.

Therefore, in recent years, there have been various studies on the method of separating the oil of the pulmonary cutting oil as described above. One of techniques for separating the oil from the pulmonary cutting oil is disclosed in Japanese Patent Application Laid-Open No. 10-2016-0004019 , &Quot; prior art ").

The prior art includes the steps of injecting an acidic substance into the emulsified waste cutting oil; Agitating the pulverized cutting oil and the acidic substance to separate them into an aqueous layer and an oil layer; Supplying electrical energy to the separated water layer to electrolyze water and a water-soluble material; And discharging the oil layer, the electrolyzed water, and the sediment to the outside, respectively.

That is, in the prior art, the waste oil layer and the acidic material are stirred by using an agitator to collect and discharge the separated oil layer. When the agitator is not used, the agitation of the pulverized oil and the acidic substance is easy There is a problem that it is difficult to get rid of, and the stirring process must be performed after each material is completely supplied, so that the process becomes long.

In addition, in the prior art, since the oil obtained by a single separation process is discharged as recycled waste oil, impurities such as water and solid substances are mixed in the recycled waste oil, which may cause problems when it is used as recycled waste oil.

KR 10-2016-0004019 A 2016.01.12.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems of the prior art, and it is an object of the present invention to provide a method and apparatus for supplying bubbles having sulfuric acid and thermal energy to pulverized cutting oil, A highly concentrated recycled waste oil separation system capable of producing highly concentrated recycled waste oil from waste cutting oil as a result of the primary waste oil being produced and the primary waste oil being centrifuged to remove water and solids in the second order, .

In order to solve the above problems, a highly concentrated waste oil separation system of the present invention is configured to have a rectangular shape, and has a primary waste oil discharge port at the upper portion thereof, a treated water discharge port at the lower portion thereof, A separation chamber in which bubbles having a predetermined thermal energy are supplied and the pulverized cutting oil and the acidic substance are stirred by the supplied bubbles and the pulverized cutting oil is separated into the primary waste oil and the treated water; And a centrifugal separator for receiving the primary waste oil from the separation chamber and separating and discharging the waste oil into water, slurry and secondary waste oil by centrifugal force.

At this time, in the separation chamber, the inner space is separated into a supply tank, a reaction tank, and a discharge tank by the first bank and the second bank, and the pulverized cutting oil, the acidic substance and the bubbles supplied from the supply tank are mutually agitated, The waste cutting oil is separated from the reaction tank, and the primary waste oil and the treated water are separated and discharged from the discharge tank.

On the other hand, the supply tank includes a steam supply pipe having one end connected to the steam supply device and the other end adjacent to the bottom surface of the supply tank; And a pipe having a circular ring shape having a curvature, and a plurality of injection nozzles are arranged with a predetermined distance from each other in the circumferential direction of the pipe, And a supply nozzle portion provided at the other end of the steam supply pipe.

The method for separating recycled waste oil using the highly concentrated recycled waste oil separation system according to the present invention comprises the steps of supplying pulverized cutting oil to a separation chamber 100 having a predetermined volume, A primary waste oil separation step of supplying bubbles having a predetermined thermal energy and allowing a chemical reaction to take place for a predetermined period of time to separate the primary waste oil and the water; And a secondary waste oil separation step of separating the primary waste oil separated by the primary waste oil separation step into a secondary waste oil, a slurry, and water using a centrifugal separator.

At this time, the primary waste oil separation step may include a raw material charging step of supplying the pulverizing oil and the acidic material to the supply chamber of the separation chamber; An aeration step of supplying bubbles having a predetermined thermal energy upward from a lower part of the supply tank to an inclined upward direction and stirring the waste coolant and the acidic material while the supplied bubbles form a cyclone; A chemical reaction step of separating the mixture into primary waste oil and treated water by applying a predetermined heat to the reaction tank while the stirred mixture flows from the supply tank to the reaction tank; And a discharging step of separating the primary waste oil and the treated water into the upper and lower layers by the difference in specific gravity in a state where the primary waste oil and the treated water separated by the chemical reaction step are moved to the discharge vessel do.

According to the present invention, the primary waste oil is separated using the acidic substance, and the secondary waste oil is separated from the separated primary waste oil by centrifugal force, thereby producing the highly concentrated recycled waste oil from which moisture and impurities are removed have.

In addition, when the primary waste oil is separated, the waste oil is mixed with the acidic substance evenly by the bubbles being sprayed while being rotated in one direction, so that the primary waste oil can be more smoothly separated and the secondary waste oil When separating, the three-phase materials are separated from each other by using a single horizontal centrifugal separator, which is advantageous in that the time and cost for separating the secondary waste oil can be reduced.

In addition, according to the present invention, because the chemical reaction is performed while the fluid introduced into the separation chamber flows in zigzags, the residence time of the introduced fluid, that is, the time for chemical reaction, The mixing and separation of fluids is performed, and the production efficiency of the primary waste oil is increased.

1 is a schematic diagram of a highly concentrated recycled waste oil separation system according to the present invention;
2 is an enlarged view of a steam supply part applied to the present invention;
3 is a flow chart of a method for separating recycled waste oil of high concentration according to the present invention.
4 to 6 are photographs showing that the pulverized cutting oil is separated into the oil layer and the water layer in accordance with the change of the pH and the temperature condition of the mixture.

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

The present invention relates to a highly concentrated waste oil recycling system and a method for separating recycled waste oil using the same. More specifically, the present invention relates to a waste recycling waste oil separating system for supplying waste oil with sulfuric acid and heat energy to waste cutting oil, The present invention relates to a highly concentrated waste oil separation system capable of producing highly concentrated waste oil from pulverized cutting oil by removing secondary moisture and solid matter by centrifuging the primary waste oil, will be.

FIG. 1 is a schematic view of a highly concentrated recycled waste oil separation system according to the present invention, and FIG. 2 is an enlarged view of a steam supply part applied to the present invention.

The present invention relates to a highly concentrated recycle waste oil separation system, and comprises a separation chamber (100) and a centrifuge (200).

The separation chamber 100 separates the primary waste oil from the waste cutting oil by using the acidic substance and thermal energy.

In addition, the separation chamber 100 has a rectangular shape, and has a primary waste oil outlet 131 at an upper portion thereof, a treated water outlet 132 at a lower portion thereof, a pulverized cutting oil is supplied to the inside thereof, Bubbles having a predetermined thermal energy are supplied and the waste cutting oil and the acidic substance are stirred by the supplied bubbles so that the waste cutting oil is separated into the treated water and the primary waste oil.

The first and second barrier ribs 140 and 150 are spaced apart from each other by a predetermined distance and the first and second barrier ribs 140 and 150 are formed in the separation chamber 100, The first partition 141 and the second partition 150 may be divided into a first partition wall 110 and a reaction chamber 120 and a discharge chamber 130. The first partition wall 140 and the second partition wall 150 may have a first outlet 141 and a second outlet 151, The mixture contained in the separation chamber 100 flows sequentially through the feed tank 110, the reaction tank 120, and the discharge tank 130, thereby separating the primary waste oil and the treated water.

The first outlet 141 is positioned below the first partition 140 and the second outlet 151 is positioned above the second partition 150 so that the separation chamber 100 ) Is moved in a zigzag manner so that a chemical reaction is performed.

The supply tank 110 is for supplying and mixing the pulverized cutting oil, the acidic material and the air bubbles, and the supplied bubbles stir the pulverized cutting oil and the acidic material.

At this time, the waste cutting oil is supplied through the waste cutting oil supply pipe 111 provided at one side of the supply tank 110. The waste cutting oil is pretreated, and is supplied to the supply tank 110 with 7 to 9 pH, As shown in FIG.

Meanwhile, the acidic substance is supplied to the acidic substance supply pipe 112, one side of which is provided in the supply tank 110 and the other side thereof is connected to an acidic substance storage tank provided separately, 112 are provided with a pump P and a valve (not shown) is provided on the front and rear of the pump P so that the supply of the acidic substance is selectively performed.

At this time, the acidic substance is a substance having a strong acid, specifically hydrochloric acid or sulfuric acid.

The bubbles are supplied by a steam supply unit 300 connected to a steam supply unit 400 provided at one side of the supply tank 110 and the other side of which is separately provided. A supply pipe 310, and a supply nozzle unit 320. [

The steam supply pipe 310 has one end connected to the steam supply device 400 and the other end adjacent to the bottom of the supply tank 110.

The supply nozzle unit 320 is formed of a pipe having a circular ring shape having a curvature and a plurality of injection nozzles 321 are arranged at predetermined distances in the circumferential direction of the supply nozzle unit 320 So as to be connected to the other end of the steam supply pipe (310).

At this time, the supply nozzle unit 320 is disposed such that the injection nozzle 321 is directed upward of the supply tank 110 and is coupled to the steam supply pipe 310, Aeration is made from below to above.

Meanwhile, the injection nozzle 321 is inclined in one direction so that bubbles are supplied in an inclined direction.

Accordingly, since the bubbles aerated in the supply tank 110 are sprayed in an oblique direction of the spray nozzle 321, the bubbles are moved upwards in a spiral shape so that the waste cutting oil and the acidic substance are more easily mixed.

At this time, in the northern hemisphere, the coriolis force causes the fluid to rotate counterclockwise. Therefore, in order to further improve the stirring effect due to aeration, the injection nozzle 321 is inclined upward toward the right side so that the bubbles aerated in the injection nozzle 321 can be rotated counterclockwise desirable.

That is, according to the above configuration, mixing and chemical reaction of the waste cutting oil and the acidic substance can be easily performed in the supply tank 110.

In addition, the steam supply device 400 supplies bubbles having a predetermined temperature into the supply tank 110. At this time, since the supplied bubbles are injected in the oblique direction of the injection nozzle 321, A cyclone is generated in the supply tank 110 while being moved upward.

Accordingly, the pulverized cutting oil and the acidic substance contained in the feed tank 110 are mixed so as to have a uniform pH and a uniform temperature as a whole.

In the meantime, a pH sensor S1 for measuring the pH of a mixture of pulverized cutting oil and an acidic substance is provided in the feed tank 110, and the supply of the acidic substance is adjusted so that the pH of the mixture is 3 to 4 And the mixture mixed to have the pH of the range is allowed to flow into the reaction tank 120 through the first outlet 141 provided in the lower part of the first partition wall 140.

At this time, the first outlet 141 is provided with an on / off valve (not shown) for controlling the discharge, so that the mixed mixture flows into the reaction vessel 120 with a constant pH (3 to 4) .

In the reaction tank 120, the mixed mixture is introduced into the feed tank 110, and the chemical reaction between the pulverized cutting oil and the acidic substance is performed at a predetermined temperature for a predetermined time, and the separated water is separated into the treated water and the first waste oil .

In addition, a mixture of the pulverized cutting oil and the acidic substance is supplied to the reaction tank 120, and the supplied mixture is heated so as to maintain a temperature of 80 to 85 ° C., whereby the activity of the oil particles is lowered The separated mixture is separated into oil layer, which is the primary waste oil, and water layer, which is treated water.

At this time, the mixture supplied to the reaction tank 120 is supplied in a heated state by the thermal energy of the bubbles, but it may be difficult to maintain the temperature of 80 to 85 ° C constantly by thermal energy of the bubbles alone.

Therefore, a heat generating device 500 is formed on the sidewalls of the first partition 140, the second partition 150, and the separation chamber 100 of the reaction tank 120, And a temperature sensor S2 for measuring the internal temperature of the reaction tank 120 so that the temperature of the reaction tank 120 can be maintained at a predetermined temperature.

Meanwhile, the fluid separated into the oil layer and the water layer in the reaction tank 120 flows into the discharge tank 130 through the second discharge port 151 formed on the upper portion of the second bank 150.

The discharge vessel 130 receives the fluid from the reaction vessel 120 and has a primary waste oil outlet 131 formed at an upper portion thereof and a treated water outlet 132 formed at a lower portion thereof, Is discharged through the primary waste oil discharge port (131), and the treated water located in the lower part is discharged to the treated water discharge port (132).

In addition, in the reaction tank 120, the fluid flows into the discharge tank 130 while being separated into the oil layer and the water layer, and the oil layer is floated to the upper part of the water layer by the difference in specific gravity between the water layer and the oil layer, The primary waste oil is discharged through the primary waste oil outlet 131, and the treated water that has settled in the lower portion is discharged through the treated water outlet 132.

At this time, the primary waste oil outlet 131 is connected to the centrifugal separator 200 so that the primary waste oil flows to the centrifugal separator 200, and the treated water outlet 132 is connected to the treatment water treatment facility side So as to purify the treated water.

The separation chamber 100 may be configured such that the fluid introduced by the first and second partition walls 140 and 150 flows in the upper and lower zigzags, The introduced fluids are mixed by the cyclone generated in the feed tank 110 and the mixed material flows into the reaction tank 120 through the first outlet 141, The chemical reaction is continuously carried out in the oil separator 120 and the oil layer and the water layer are separated from each other and flowed to the discharge tank 130 to produce the primary waste oil.

That is, according to the present invention, as the residence time of the fluid introduced into the separation chamber 100, that is, the time for chemical reaction, becomes long, the mixing and separation of the fluid are performed for a sufficient time, The efficiency is increased.

On the other hand, the centrifugal separator 200 receives the primary waste oil separated from the separation chamber 100 and separates and discharges it into water, slurry and secondary waste oil by centrifugal force to generate highly concentrated recycled waste oil .

The centrifugal separator 200 includes a cylindrical rotating body 210, a primary waste oil supply pipe 220, a slurry discharge port 230, a water discharge port 240, and a secondary waste oil discharge pipe 250 do.

The cylindrical rotating body 210 is provided inside the casing, and one side of the cylindrical rotating body 210 has a cone shape whose diameter gradually decreases.

The primary waste oil supply pipe 220 is provided on the other side of the cylindrical rotary body 210 so as to be concentric with the cylindrical rotary body 210. One side of the primary waste oil supply pipe 220 is connected to the cylindrical rotary body 210, And the other side is connected to the primary waste oil outlet 131 so as to supply the primary waste oil to the inside of the cylindrical rotating body 210.

A plurality of slurry outlets 230 are radially formed along the circumference of one end of the cylindrical rotating body 210, and the slurry separated by the centrifugal force is discharged. At this time, the slurry discharged through the slurry discharge port 230 is collected through the slurry discharge pipe 231 located downward.

A plurality of water discharge ports 240 are radially formed along the circumference of the other side of the cylindrical rotating body 210, and water separated by the centrifugal force is discharged. At this time, the water discharged through the water outlet 240 is collected through the water discharge pipe 241 located downward.

The secondary waste oil discharge pipe 250 is branched from the primary waste oil supply pipe 220 to discharge the secondary waste oil separated by the centrifugal force.

3 is a flow chart of a highly concentrated recycled waste oil separation method according to the present invention.

Referring to FIG. 3, the present invention mainly includes a primary waste oil separation step and a secondary waste oil separation step.

1. The primary waste oil separation step (S10)

The primary waste oil separation step S10 is a process of separating the primary waste oil from the waste cutting oil using a chemical reaction. The waste oil is supplied to the separation chamber 100, The pH of the cutting oil is adjusted to 3 to 4, and bubbles having a predetermined heat energy are supplied. Then, a chemical reaction is performed for a predetermined time, so that the pulverized cutting oil is separated into primary waste oil, water and slurry.

In addition, the primary waste oil separation step S10 includes a raw material input step S11, an aeration step S12, a chemical reaction step S13, and a primary separation step S14.

1-1) Feeding step (S11)

The feedstock input step S11 is a process of supplying the waste cutting oil and the acidic substance to the feed tank 110 of the separation chamber 100.

At this time, pulp coolant having an acidic property of pH 7 to 9 is supplied, and the acidic substance is supplied with sulfuric acid or hydrochloric acid having strong acidity.

1-2) Aeration step (S12)

The aeration step S12 is a process for mixing the pulverized cutting oil and the acidic substance contained in the feed tank 110, and the bubbles are injected in an upward direction inclined from the lower part of the feed tank 110. [

In addition, the bubbles having a predetermined thermal energy are generated using the separately provided steam supply device 400, and the generated bubbles flow through the steam supply pipe 310 and are supplied to the bottom surface of the supply tank 110 Is delivered to the positioned supply nozzle unit 320 and is injected through the injection nozzle 321.

At this time, since the injection nozzle 321 is provided in the supply nozzle part 320 such that the discharge port is upwardly inclined rightward, the bubbles ejected from the injection nozzle 321 flow upward to the right side, that is, It is rotated in the clockwise direction to flow upward.

Accordingly, the cyclone rotating in the counterclockwise direction is formed in the supply tank 110, so that the pulverized cutting oil and the acidic substance are mixed evenly.

1-3) Chemical reaction step (S13)

In the chemical reaction step S13, the mixture mixed in the aeration step S13 is supplied to the reaction vessel 120 of the separation chamber 100 and supplied with a predetermined heat to the primary mixture, So that it is separated into treated water which is an aqueous layer.

In addition, when the mixture flows into the reaction tank 120, heat is applied to the interior of the reaction tank 120 so that the internal temperature is maintained at 80 to 85 ° C., whereby the mixture is mixed with the primary waste oil and the treated water .

1-4) Primary Separation Step (S14)

In the primary separation step S14, the primary waste oil and the treated water separated by the chemical reaction step (13) flow into the discharge tank (130) And then discharging them separately.

In addition, the mixture is separated into the primary waste oil and the treated water by the chemical reaction step (14), and the treatment water having a relatively heavy specific gravity is placed in the lower part, and the primary waste oil, So that the separated primary waste oil and treated water are discharged through the respective discharge portions 131 and 132. In this case,

2. Secondary waste oil separation step (S20)

In the secondary waste oil separation step S20, the primary waste oil separated through the primary waste oil separation step S10 is introduced into the centrifugal separator 200, and the primary waste oil is separated from the primary waste oil by the centrifugal force of the centrifugal separator 200 Car oil, slurry, and water, respectively.

The slurry separated by the centrifugal force is supplied to the slurry discharge port 230 located at the front side of the centrifugal separator 200, And the water is discharged through the water outlet 240 located on the rear side of the centrifuge 200. [

At this time, the secondary waste oil having the smallest specific gravity is discharged to the outside through the secondary waste oil discharge pipe 250 in a state where it is located at the center of the shaft in the centrifuge 200, and the discharged secondary oil is subjected to the treatment process It should be used as highly recycled waste oil.

That is, the present invention has the advantage of separating the primary waste oil using an acidic substance and separating the secondary waste oil from the separated primary waste oil by centrifugal force, thereby producing highly concentrated recycled waste oil from which moisture and impurities have been removed have.

In addition, the present invention is advantageous in that, when the primary waste oil is separated, the primary waste oil is more smoothly separated as the acidic substance and the waste cutting oil are evenly mixed by the bubbles sprayed while being rotated in one direction.

In addition, when separating the secondary oil, the three-phase materials are separated from each other by using the single horizontal separator (200), which is advantageous in that it takes less time and cost to separate the secondary oil have.

Figs. 4 to 6 are photographs showing that the pulverized cutting oil is separated into the oil layer and the water layer according to the change of pH and temperature condition of the mixture.

4 is a photograph showing that the pulverized cutting oil is separated into an oil layer and a water layer by changing the pH to 3, 6 and 9 at room temperature (24 ° C) 6 and 9, and FIG. 6 is a photograph showing that the pulverized cutting oil is separated into the oil layer and the water layer by changing the pH to 3, 6, and 9 at a temperature of 80 ° C. It is the photograph which it took.

Referring to FIGS. 4 to 6, it can be seen that the waste oil is most separated when the pH is 3 at a temperature of 80 ° C.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, 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 as defined by the appended claims.

100: separation chamber 110: supply tank
111: Waste coolant supply pipe 112: Acid supply pipe
120: reaction tank 130: exhaust tank
131: primary waste oil outlet 132: treated water outlet
140: first partition 141: first outlet
150: second partition 151: second outlet
200: centrifugal separator 210: cylindrical rotating body
220: Primary waste oil supply piping
230: Slurry discharge port 231: Slurry discharge pipe
240: Water outlet 241: Water discharge pipe
250: Secondary waste oil discharge piping
300: steam supply part
310: steam supply pipe 320: supply nozzle part
321: injection nozzle
400: steam supply device 500: heating device

Claims (5)

A primary waste oil discharge port 131 is provided at an upper portion thereof and a treated water discharge port 132 is provided at a lower portion thereof. Bubbles having an acidic substance and a predetermined thermal energy are supplied at the same time as pulsing oil is supplied to the inside thereof, A separation chamber 100 in which the pulverized cutting oil and the acidic substance are stirred by the supplied bubbles and the pulverized cutting oil is separated into the primary waste oil and the treated water; And
A centrifugal separator 200 for receiving primary waste oil from the separation chamber 100 and separating and discharging the waste oil into water, slurry and secondary waste oil by centrifugal force;
And,
The separation chamber (100)
The inner space is separated into the supply tank 110, the reaction tank 120 and the discharge tank 130 by the first partition 140 and the second partition 150, and the waste coolant supplied from the supply tank 110, The waste water is separated from the reaction tank 120 and the primary waste oil and the treated water are separated and discharged from the discharge tank 130,
The feed tank (110)
A steam supply pipe 310 connected at one end to the steam supply device and the other end adjacent to the bottom surface of the supply tank 110; And
And a plurality of injection nozzles 321 are spaced apart from each other by a predetermined distance along the circumferential direction of the tube, and the injection nozzle 321 A supply nozzle part 320 provided at the other end of the steam supply pipe 310 so as to face upward;
And a high-concentration recycled waste oil separation system

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