KR101606914B1 - Washing apparatus of crude oil tank - Google Patents

Abstract

The present invention relates to a washing apparatus for a crude oil storage tank, washing away sludge made of a pollution material, rust or residual material of floating matter or the like, which remain in the crude oil storage tank after discharging oil from the crude oil storage tank formed to store the oil. According to the present invention, when the sludge coagulated in the crude oil tank is crushed to be washed away by the oil or is washed away by washing water, the used oil or the used washing water is heated and is injected into the crude oil storage tank, and the waste oil mixed with the sludge in the crude oil storage tank or waste washing water mixed with the waste oil is circulated while being heated multiple times to be used as washing oil or washing water. Moreover, the present invention has an effect to resolve a difficulty that a large amount of water has to be separated from the waste oil mixed with the sludge since the sludge coagulated in the crude oil storage tank is crushed to be washed away by injecting the heated oil. Furthermore, the present invention has another effect to reduce heat loss in reheating the washing oil since the sludge in the crude oil storage tank is crushed to be washed away by circulating the waste oil mixed with the sludge, which is used as the washing oil, while repeatedly reheating the waste oil. In addition, the present invention has the other effect to completely separate the sludge and the waste oil in such a manner that the sludge among the waste oil and the sludge separated from each other in a sludge separation tank by means of a settling way using a difference in specific gravity is heated in a second heat exchanger and is again separated.

Description

[0001] The present invention relates to a crude oil storage tank cleaning apparatus,

The present invention relates to a crude oil storage tank cleaning apparatus for cleaning sludge made of contaminants remaining in a crude oil storage tank, residues of rust or suspended matter after discharging crude oil from a crude oil storage tank made for storing crude oil, When the sludge solidified in the storage tank is crushed by crude oil and cleaned or rinsed with cleaning water, the crude oil or washing water used is heated and sprayed into the crude oil storage tank, and waste oil or waste oil mixed with sludge in the crude oil storage tank The present invention relates to an apparatus for cleaning crude oil storage tanks in which mixed waste cleaning water is reheated and circulated a plurality of times to use as cleaning oil or washing water.

Crude oil storage tanks need periodic maintenance. For this maintenance, the crude oil in the crude oil storage tank must be transferred to another storage tank and the remaining crude oil and sludge should be cleaned from the crude oil storage tank. In particular, sludge accumulates on the bottom of a storage tank storing crude oil and solidifies and it is very difficult to clean (clean) in a conventional manner. Such a crude sludge cleaning apparatus or a cleaning system is variously presented.

The following is a representative prior art description of a cleaning apparatus used in a crude oil storage tank cleaning system.

Korean Patent No. 10-1224010 (Apr. 13, 2013) discloses a device for automatically cleaning crude oil storage tanks, which is installed downward on the crude oil storage tank to clean the crude oil storage tank containing sludge A driving NOZZLE UNIT for injecting crude oil into the inside thereof; A driving device installed on the driving nozzle unit for horizontally rotating the driving nozzle unit, moving the driving nozzle unit up and down, and adjusting the angle; A temporary storage tank connected to a lower portion of the crude oil storage tank by a first pipe and connected to the first pipe to receive and store crude oil from the crude oil storage tank; A heat exchanger connected to the driving nozzle unit on one side by the second piping and the heat exchanger for the crude oil stored in the temporary storage tank and connected to the temporary storage tank by the third piping to be supplied to the driving nozzle unit; A boiler having one side connected to the heat exchanger by a fourth pipe and a connection pipe having one side connected to the heat exchanger and the other side connected to the other side of the boiler through the temporary storage tank, A crude oil heating device configured to circulate through a heat exchanger and a temporary storage tank; And one side is connected to the lower end of the temporary storage tank by a fifth pipe so that sludge and water contained in the crude oil are separated by receiving the crude oil at the bottom of the temporary storage tank and the other side is connected to the temporary storage tank And a centrifuge for supplying sludge and crude oil from which water has been separated.

In addition, the above-described prior art can improve the cleaning efficiency by allowing the spray nozzle to move up and down, rotate, and adjust the angle. However, there is a limit in not providing an efficient cleaning process of the entire oil storage tank. There is a need for continuous research and development.

1. Korean Registered Patent No. 10-1224010 (Jan. 13, 2014)

The present invention relates to a crude oil storage tank cleaning apparatus for spraying cleaning water heated to a predetermined temperature in order to crush sludge solidified in a crude oil storage tank, And when the waste washing water mixed with the sludge in the crude oil storage tank is filled with a certain volume, the waste washing water mixed with the sludge in the crude oil storage tank is discharged to the water separation tank and then the new washing water is heated again and sprayed into the crude oil storage tank The crude oil storage tank was repeatedly rinsed.

However, such a crude oil storage tank washing apparatus has a problem in that a large amount of washing water must be heated;

Since the washing water has to be heated repeatedly from the beginning, there is a problem that energy loss for heating the washing water is large;

The amount of waste washing water mixed with sludge is increased, resulting in an increase in economic loss for separating sludge and waste washing water;

It is difficult to completely separate the sludge and the washing water from each other by using a static method using a specific gravity difference in a simple water separation tank. Therefore, the main object of the present invention is to provide a solution to this problem.

The present invention has been made to solve the above-

A crude oil storage tank cleaning apparatus using a crude oil cleaning process for cleaning a crude oil storage tank using crude oil, comprising: a tank for storing crude oil discharged from a crude oil storage tank, waste oil discharged from the following sludge separation tank or waste oil discharged from the following three- A waste oil tank; A refinery tank for storing crude oil; A first heat exchanger for receiving and heating crude oil from the cleansing oil tank; A scrubber installed in an oil storage tank to be cleaned and supplied with the crude oil heated in the first heat exchanger to spray heated crude oil into the crude oil storage tank to crush and clean the sludge; A sludge separation tank for receiving waste oil mixed with the sludge pulverized by the scrubber in the crude oil storage tank and mixing the sludge, and separating the waste oil and the sludge by leaving the waste oil mixed with the sludge; A second heat exchanger for receiving and heating sludge in the sludge separation tank; And a three-phase separator for receiving the sludge heated by the second heat exchanger and separating the sludge from the sludge heated by the sludge discharged by the sludge cleaner, Is supplied to the sludge separator after the circulation process of being supplied again to the first heat exchanger and reheated and sprayed again into the crude oil storage tank by the cleaner is performed a plurality of times, and then supplied to the sludge separation tank;

1. A crude oil storage tank cleaning apparatus using a cleaning water cleaning process for cleaning an oil storage tank using cleaning water, comprising: a waste oil tank for receiving and storing waste oil discharged from the following water separation tank or waste oil discharged from the following three-phase separator; A washing water tank for storing clean washing water; A first heat exchanger for receiving and heating the washing water from the washing water tank; A cleaner installed in the crude oil storage tank to be cleaned and supplied with cleaning water heated in the first heat exchanger and spraying heated cleaning water into the crude oil storage tank to clean residual oil in the crude oil storage tank; A distillation tank for receiving spent cleaning water mixed with waste oil washed by a scrubber in the crude oil storage tank and separating waste oil and waste washing water by keeping the waste washing water mixed with waste oil; A second heat exchanger for receiving and heating waste washing water from the water separation tank; And a three-phase separator for receiving the waste washing water heated by the second heat exchanger and separating the waste washing water into liquid waste oil, heavy waste water and solid waste, and discharging waste oil, The spent cleaning water is supplied again to the first heat exchanger and reheated, and the circulation process of spraying again into the crude oil storage tank by the cleaner is performed a plurality of times, and then supplied to the oil separation tank.

The crude oil storage tank cleaning apparatus according to the present invention as described above injects heated crude oil into the sludge solidified in the crude oil storage tank to crush and wash the sludge so that it is difficult to separate a large amount of water from the waste oil mixed with the sludge The effect of solving the problem can be obtained;

The sludge in the crude oil storage tank is pulverized and cleaned by repeatedly reheating and circulating the waste oil mixed with the sludge used in the cleaning flow path, so that the heat loss for reheating the refining oil can be reduced;

The sludge can be separated from the waste oil and the sludge by the second heat exchanger and separated again in the three-phase separator, whereby the sludge and the waste oil can be perfectly separated from each other;

If necessary, a part of the waste oil mixed with the sludge discharged from the crude oil storage tank is directly discharged to the second heat exchanger without being discharged to the sludge separation tank. The high concentration sludge contained in the waste oil is heated, A perfect separating effect can be obtained;

It is possible to obtain the effect of cleaning the waste oil remaining in the crude oil storage tank even though the sludge has been removed by using the washing water instead of the crude oil.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a main configuration of a crude oil storage tank cleaning apparatus according to a preferred embodiment of the present invention; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a crude oil storage tank cleaning apparatus.
FIG. 3 (a) is a block diagram showing a main process of a crude oil storage tank cleaning apparatus using crude oil, among crude oil storage tank cleaning apparatuses according to a preferred embodiment of the present invention. FIG.
FIG. 3 (b) is a block diagram showing main steps of a crude oil storage tank cleaning apparatus using cleaning water, among crude oil storage tank cleaning apparatuses according to a preferred embodiment of the present invention. FIG.

The present invention relates to a crude oil storage tank (10) for withdrawing and using crude oil in a crude oil storage tank (10) made for storing crude oil, and for cleaning sludge made of contaminants remaining in the crude oil storage tank (10) And a cleaning device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown.

First, the crude oil storage tank cleaning apparatus according to the embodiment of the present invention is used to store crude oil (distilled and untreated crude oil) temporarily stored in the crude oil storage tank 10 before crude oil is stored And discharging the residue remaining in the crude oil storage tank 10 to the waste oil tank 20 and cleaning the sludge accumulated or solidified on the bottom or inner wall of the crude oil storage tank 10.

As shown in FIG. 2, the cleaning process used in the crude oil storage tank cleaning apparatus according to the present invention is crude oil and cleaning water, and the cleaning process includes a crude oil cleaning process using crude oil as a cleaning fluid (cleansing oil) Cleaning process.

In addition, the crude oil cleaning process is mainly performed by crushing sludge in the crude oil storage tank 10 with crude oil sprayed, and cleaning the washing water is performed by the crude oil washing process or other washing process as described above. And the cleaning water is injected into the removed crude oil storage tank 10 for cleaning.

In the following description, the transfer, supply and discharge of fluid such as residual oil, crude oil, waste oil, sludge, washing water and waste washing water are performed through a pipe (or a hose), and a valve May be mounted on the pipe, and a pump for providing a fluid force to the fluid may be mounted on the pipe. In addition, the piping may be equipped with a measuring device such as a pressure gauge or a temperature gauge.

Hereinafter, the concrete description of the piping, the valve, the pump, and the measuring apparatus will be described in the description of the air, and a description will be given in the case where the description is necessary or applied to the technical idea of the present invention.

First, the crude oil storage tank cleaning apparatus using the crude oil cleaning process for cleaning the crude oil storage tank 10 using crude oil will be described as follows.

Specifically, the waste oil tank 20 is configured to receive and store the residue discharged from the crude oil storage tank 10, the waste oil discharged from the sludge separation tank 60a, or the waste oil discharged from the following three-phase separator 80, (Residual oil separated from sludge or wastewater) is stored in the empty internal space.

That is, the residual oil remaining in the crude oil storage tank 10 is transferred to the waste oil tank 20 via the suction force of the separate pumping device or the pipe through the residual transfer process. At this time, the residual oil refers to the crude oil not containing the sludge remaining in the crude oil storage tank (10).

In addition, the waste oil stored in the waste oil tank 20 can be disposed of or recycled by a separate waste disposal method.

More specifically, the cleansing oil tank 30a stores clean crude oil that is the same as the crude oil stored in the crude oil storage tank 10, and supplies the crude oil to the first heat exchanger 40 .

That is, it is preferable to use a clean state of the crude oil stored in the washing oil tank 30a. If the residual oil remaining in the crude oil storage tank 10 is in a clean state, the residual oil is stored in the waste oil tank 20, But may be transferred to the oil tank 30a for use as crude oil. And the waste oil tank 20 is used as a cleaning oil tank 30a instead of the oil storage tank 30a to constitute a separate discharge pipe in the waste oil tank 20, Or waste oil may be used as crude oil for washing the crude oil storage tank 10.

In addition, the first heat exchanger 40 is configured to heat and receive the crude oil from the cleansing oil tank 30a. By heating the crude oil used as the cleansing liquid to a predetermined temperature and supplying it to the scrubber 50, 10 to improve the crushing ability of the solidified sludge.

That is, the first heat exchanger 40 is configured to heat the crude oil transferred from the washing oil tank 30a to the first heat exchanger 40 by receiving a heating medium such as steam, hot water or oil heated by a separately configured boiler, to be. At this time, the description of the heat exchange method by the first heat exchanger 40 will be replaced by a general heat exchanger.

The crude oil heated in the first heating process by the first heat exchanger 40 may be heated to a suitable temperature according to the judgment of a person skilled in the art, but is preferably heated to 50 to 70 ° C. That is, when the heating temperature of the crude oil is less than 50 ° C, the heat energy due to the crude oil is insufficient, so that the sludge solidified in the crude oil storage tank 10 is insufficiently melted and does not fall off well in the crude oil storage tank 10. There is a possibility that the crude oil storage tank 10 may be damaged due to the rapid expansion of the various gaskets or compression rings mounted on the washer 50 and deteriorated due to high temperature and damage or gas that may be present in the crude oil storage tank 10 , The crude oil is preferably heated to a temperature within the above range.

The washer 50 is attached to the crude oil storage tank 10 to be cleaned and receives the heated crude oil from the first heat exchanger 40 and injects the heated crude oil into the crude oil storage tank 10, The sludge solidified in the crude oil storage tank 10 is removed by providing a spraying force to the heated crude oil.

That is, the crude oil heated by the first heat exchanger 40 (hereinafter referred to as the cleansing oil) is injected into the crude oil storage tank 10 by the cleansing oil spraying process by the cleaner 50 mounted on the upper portion of the crude oil storage tank 10 (Not shown). At this time, the cleaning oil is pressurized by the pump connected to the cleaner 50 to have the spraying force, and is injected into the crude oil storage tank 10 through the spray nozzle provided in the cleaner 50.

The number of installed and installed methods of the washer 50 with respect to the crude oil storage tank 10 can be appropriately determined according to the type of the washer 50. [ The jet nozzle of the washer 50 is positioned inside the crude oil storage tank 10 and injects the oil to the inner wall or bottom of the crude oil storage tank 10 in accordance with the movement of a certain portion of the washer 50 equipped with the injection nozzle can do.

Further, the spray pressure of the washing oil by the washer 50 can be appropriately adjusted by those skilled in the art depending on factors such as the type and condition of the crude oil storage tank 10, the degree and amount of solidification of the sludge, and the like.

In addition, the cleansing oil sprayed by the scrubber 50 is used to crush and clean the sludge accumulated or solidified in the crude oil storage tank 10. At this time, 'crushing the sludge' means making the accumulated or coagulated sludge small And the cleansing oil, which is crude oil heated in the first heat exchanger (40), is hotter than the crude oil at room temperature, so that the sludge can be more easily pulverized.

In addition, the sludge separation tank 60a is supplied with waste oil mixed with the washed sludge by the cleaner 50 in the crude oil storage tank 10, and the waste oil mixed with the sludge is allowed to stand to separate waste oil and sludge A sludge separation process for separating waste oil containing sludge washed in the crude oil storage tank 10 by using a difference in specific gravity.

That is, the sludge separation tank 60a receives the waste oil mixed with the sludge discharged from the crude oil storage tank 10, sets the waste oil mixed with the sludge for a predetermined period of time, Is located on the bottom side of the sludge separation tank (60a), and the waste oil having a relatively small specific gravity is located above the sludge separation tank (60a), thereby separating the sludge from the waste oil.

At this time, the sludge separation tank 60a has the same function as the water separation tank 60b of the crude oil storage tank cleaning apparatus using the washing water cleaning process described below, and the same separation tank is connected to the sludge separation tank 60a ) Or the water separation tank 60b.

In addition, the sludge separation tank 60a may be supplied with washing water through a separate washing water supplying means for washing the sludge separating tank 60a or adjusting the viscosity of the sludge contained therein, The washing water tank 30b or a water supply for supplying washing water.

In addition, the waste oil that has been separated from the sludge separation tank 60a is transferred to the waste oil tank 20 (or the cleaning oil tank 30a), and the sludge that has settled on the bottom side of the sludge separation tank 60a, Is sucked by a suction device which is discharged to the discharge port provided at the lower side of the sludge separation tank (60a) or inserted into the sludge separation tank (60a), and then is transferred to the second heat exchanger (70) described below.

The waste washing water used for washing the sludge separating tank 60a may be transferred to the second heat exchanger 70 together with the sludge or only the waste washing water may be discharged through another outlet installed in the sludge separating tank 60a And then purified or discarded.

The second heat exchanger 70 is configured to heat the sludge separated from the sludge separation tank 60a to a predetermined temperature. The sludge is heated to lower the viscosity and improve the fluidity. The three-phase separator 80 ) In order to improve the sludge separation effect.

That is, the second heat exchanger 70 receives the heating medium such as steam, hot water, or oil heated by the boiler separately configured as the first heat exchanger 40 and heats the sludge transferred from the sludge separation tank 60a .

The sludge heated by the second heating process by the second heat exchanger 70 may be heated to a suitable temperature according to the judgment of a person skilled in the art, but is preferably heated to 70 to 90 ° C. That is, if the heating temperature of the sludge is less than 70 ° C, the sludge is less heated and the improvement of fluidity of the sludge becomes insufficient. As a result, improvement in sludge separability in the three-phase separator 80 becomes insufficient. It is preferable that the sludge is heated to a temperature within the above range because there is a possibility that the sludge will boil up in the sludge rather lowering the separability in the three-phase separator 80.

In addition, the three-phase separator 80 separates and discharges the heated sludge from the second heat exchanger 70 into a liquid waste liquid, a heavy liquid waste water, and a solid liquid having a large liquid volume. The waste oil and the three- 80) (or the sludge separating tank 60a), the waste water and the solid material (Cake) are separated.

In other words, although the three-phase separator 80 may be of various types, generally, after the undiluted solution (heated sludge of the present invention) is supplied and mixed with the washing water in the three-phase separator 80, It is a device that separates the substances contained in the undiluted solution by type.

At this time, the three-phase separator 80 according to the present invention also separates the sludge heated in the second heat exchanger 70 into a liquid liquid waste liquid, a heavy liquid waste liquid, and a solid liquid with a high liquid level, This is the configuration for the separation process. The waste oil separated in the three-phase separator 80 is transferred to and stored in the waste oil tank 20 through a pipe. The wastewater and the solid matter are stored in respective reservoirs and then discarded or recycled.

The waste oil mixed with the sludge pulverized and cleaned by the cleaner 50 is supplied again to the first heat exchanger 40 to be reheated and is circulated back into the crude oil storage tank 10 by the cleaner 50 Is performed a plurality of times and then supplied to the sludge separation tank 60a.

That is, the circulating use of the sludge-mixed waste oil repeatedly reheats and circulates the waste oil mixed with the sludge used as the cleaning flow path to crush and wash the sludge in the crude oil storage tank 10, It is possible to realize the effect of reducing the heat loss for the heat source.

Specifically, after being heated by the first heat exchanger 40, the sludge produced by cleaning the sludge in the crude oil storage tank 10 by being sprayed to the crude oil storage tank 10 from the washer 50, The crude oil is supplied to the first heat exchanger 40 at a temperature lower than that immediately after being heated in the first heat exchanger 40, It has high temperature.

Therefore, although the sludge is contained in the waste oil, the waste oil mixed with the sludge discharged from the crude oil storage tank 10 is transferred again to the first heat exchanger 40, reheated and supplied to the washer 50, Can be injected into the crude oil storage tank 10 to reduce the heat loss for reheating the cleaning oil and to speed up the operation speed.

At this time, the process of sequentially transferring the waste oil mixed with the sludge to the crude oil storage tank 10, the first heat exchanger 40 and the cleaner 50 may be repeated a plurality of times. However, It is preferable to determine the number of cycles according to the judgment of a person skilled in the art and to discharge the waste oil mixed with the sludge to the sludge separation tank 60a at a certain period of time.

In connection with the above, it is possible to determine whether waste oil mixed with the sludge into the sludge separation tank 60a is discharged using various methods. However, in order to transfer the waste oil mixed with the heated crude oil and sludge, the first heat exchanger 40 ), The scrubber (50), and the crude oil storage tank (10), respectively.

That is, when the waste oil contains a large amount of sludge, the fluidity of the waste oil decreases, the pump pressure for pumping the waste oil increases, and the pump pressure increases as the number of cycles of the waste oil containing the sludge is repeated. In the present invention, the pressure is checked through a pressure of a pump connected to a discharge pipe of a crude oil storage tank (10) or a pressure gauge attached to a pipe for discharge, and then, when a pressure exceeds a predetermined pressure, The waste oil mixed with the discharged sludge may be transferred to the sludge separation tank 60a.

When the waste oil mixed with the sludge is reheated to use the washing channel of the crude oil storage tank 10, the waste heat oil mixed with the sludge is reheated by using the first heat exchanger 40. At this time, It is preferable that the heating temperature of the mixed oil is 50 to 70 ° C, the same as the heating temperature of the crude oil.

In the present invention, the waste oil mixed with the sludge discharged from the crude oil storage tank 10 is supplied again to the first heat exchanger 40 and reheated, and is discharged again into the crude oil storage tank 10 by the cleaner 50 5 to 15 vol% of the waste oil mixed with the sludge supplied from the crude oil storage tank 10 to the first heat exchanger 40 is discharged to the second heat exchanger 70 And is supplied to the three-phase separator 80 so as to be separated and discharged into liquid waste oil, heavy liquid waste water, and solid matter having a large liquid volume; The sludge supplied to the second heat exchanger 70 is supplied with crude oil from the oil refining tank 30a by the amount of the waste oil mixed with the sludge and is heated in the first heat exchanger 40 and then added to the crude oil storage tank 10 And the like.

That is, when the amount of the sludge mixed with the waste oil circulating through the crude oil storage tank 10, the first heat exchanger 40, and the washer 50 sequentially increases and the fluidity of the waste oil is lowered, However, only a part of the circulating waste oil is transferred to the second heat exchanger 70 and separated in the three-phase separator 80, and the remainder of the circulated waste oil is continuously stored in the crude oil storage It is possible to circulate the tank 10, the first heat exchanger 40 and the washer 50 sequentially so that the crude oil storage tank 10 can be cleaned.

At this time, since the waste oil mixed with the continuously circulating sludge has a certain amount of heat energy, the waste oil mixed with the sludge is discharged from the crude oil storage tank 10 in a lump and then the clean crude oil is heated, So that the energy loss is less than that in the case of spraying the ink droplets onto the recording medium 10.

In addition, the heated crude oil supplemented by the amount of the waste oil mixed with the sludge discharged directly to the second heat exchanger (70) is mixed with the waste oil mixed with the remaining sludge circulating, And is sprayed into the crude oil storage tank 10 by the scrubber 50.

If the amount of the waste oil mixed with the sludge separated and supplied to the second heat exchanger 70 is less than 5 vol% of the waste oil mixed with the total sludge, the amount of the waste oil mixed with the separated and discharged sludge is small, There is a problem that the effect of improving the fluidity of the mixed waste oil is insufficient. When the amount exceeds 15 vol%, there is a problem that energy loss for heating the added crude oil becomes excessively large. Therefore, To the second heat exchanger (70).

Also, the sludge mixed with the sludge separated and discharged from the crude oil storage tank 10 by the first heat exchanger 40 is heated to 70 to 90 ° C in the second heat exchanger 70, , And a detailed description thereof will be replaced with a description of the sludge heated in the second heat exchanger (70).

First, a crude oil storage tank cleaning apparatus using a cleaning water cleaning process for cleaning the crude oil storage tank 10 using cleaning water will be described as follows.

Specifically, the crude oil storage tank cleaning apparatus using the washing water has the same device configuration as the crude oil storage tank washing apparatus using the crude oil described above, but the crude oil storage tank washing apparatus using the washing water can remove most of the sludge in the crude oil storage tank 10 And the remaining sludge and oil in the crude oil storage tank 10 is removed.

That is, the crude oil storage tank cleaning apparatus using the cleansing water according to the present invention can be carried out after the crude oil storage tank 10 is firstly cleaned by the crude oil storage tank cleaning apparatus using crude oil as described above, 10 may be performed separately from the crude oil storage tank cleaning apparatus when crude oil is present in a small amount of sludge.

In addition, the crude oil storage tank cleaning apparatus using the washing water has the same device configuration as the crude oil storage tank washing apparatus using crude oil described above, but the type of the washing liquid is changed to the washing water instead of the crude oil, and the washing oil tank 30a A washing water tank 30b or a water supply line is constructed instead of the sludge separation tank 60a and a water separation tank 60b having the same purpose as the sludge separation tank 60a is formed instead of the sludge separation tank 60a, there is a difference in that the residual transfer process of discharging the residue remaining in the original crude oil storage tank 10 to the waste oil tank 20 is not processed as shown in a) to b).

That is, the crude oil storage tank cleaning apparatus using the washing water includes a waste oil tank 20 for receiving and storing the waste oil discharged from the following water tank 60b or the waste oil discharged from the following three-phase separator 80; A washing water tank 30b for storing clean washing water; A first heat exchanger (40) for receiving and heating the washing water from the washing water tank (30b); The washing water is supplied to the crude oil storage tank 10 through the first heat exchanger 40 and the heated washing water is sprayed into the crude oil storage tank 10 A cleaner 50 for cleaning the remaining waste oil of the waste water; A water separation tank 60b for receiving the waste cleaning water mixed with the waste oil cleaned by the cleaner 50 in the crude oil storage tank 10 and allowing the spent cleaning water mixed with the waste oil to stand to separate waste oil and waste washing water, Wow; A second heat exchanger (70) for receiving and heating the waste washing water from the water separation tank (60b); And a three-phase separator (80) for separating and discharging the waste cleaning water heated in the second heat exchanger (70) to a liquid waste oil, a heavy liquid waste water, The waste washing water mixed with the waste oil that has been pulverized and washed by the washing water is supplied again to the first heat exchanger 40 and reheated and the circulation process of spraying again into the crude oil storage tank 10 by the washing machine 50 is repeated several times And then supplied to the water separation tank 60b.

Also, the waste washing water mixed with the washing water and the waste oil heated in the first heat exchanger (40) may be heated to 50 to 70 DEG C, and the washing water and the waste oil heated in the second heat exchanger (70) May be configured to be heated to 70-90 < 0 > C. A concrete explanation of this will be replaced with a crude oil storage tank cleaning apparatus using crude oil.

In the present invention, 5 to 15% by volume of the spent cleaning water mixed with the waste oil supplied from the first heat exchanger (40) to the scrubber (50) is separately supplied to the second heat exchanger (70) And is supplied to the three-phase separator 80 to be separated and discharged as waste liquid oil, heavy liquid waste water and solid liquid having a high liquid content, and the waste oil supplied to the second heat exchanger 70 is mixed The washing water may be supplied from the washing water tank 30b to the crude oil storage tank 10 after being heated by the first heat exchanger 40 by the amount of the used washing water, The crude oil storage tank cleaning apparatus using the above crude oil will also be substituted.

As described above, in the present invention, the crude oil storage tank 10 is first cleaned with the crude oil storage tank cleaning apparatus using crude oil, and then the crude oil storage tank 10 is cleaned with the crude oil storage tank 10 ), So that the crude oil storage tank 10 can be cleaned.

If necessary, the crude oil storage tank 10 is cleaned with cleaning water, and after the gas in the crude oil storage tank 10 is removed or removed, the operator enters the crude oil storage tank 10, 10, it is possible to manually remove the solid matter remaining in the oil reservoir tank 10 and to repair the damaged portion in the crude oil storage tank 10. [

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 is possible to carry out various changes in the present invention.

10: crude oil storage tank 20: waste oil tank
30a: Oil tank 30b: Cleaning water tank
40: first heat exchanger 50: scrubber
60a: sludge separation tank 60b:
70: second heat exchanger 80: three-phase separator

Claims (9)

A waste oil tank 20 for receiving and storing waste residues and waste oil from the crude oil storage tank 10;
A cleaning oil tank 30a for storing crude oil for cleaning;
A first heat exchanger (40) for receiving waste oil mixed with cleaning crude oil or sludge from the cleaning oil tank (30a) and heating the oil to 50 to 70 ° C;
The heated oil from the first heat exchanger 40 is mixed with sludge mixed with the crude oil for cleaning to be injected into the crude oil storage tank 10 so that the solidified sludge is crushed and cleaned to produce waste oil mixed with the sludge A washing machine 50 for washing the washing water;
The process of washing the waste oil mixed with the sludge pulverized by the scrubber 50 in the crude oil storage tank 10 by circulating the oil to be circulated through the first heat exchanger 40 and the scrubber 50 is repeated, And a sludge separator (60a) for separating the waste oil and the sludge by the specific gravity difference when the pressure supplied to the washer of the waste oil mixed with the sludge is equal to or more than a certain level;
A second heat exchanger (70) for supplying waste oil separated from the sludge separation tank (60a) to the waste oil tank (20) and supplying the remaining sludge to the sludge tank to heat the sludge to 70 to 90 ° C to improve fluidity of the sludge;
5 to 15 vol.% Of the waste oil mixed with the sludge supplied from the crude oil storage tank 10 to the first heat exchanger 40 is separately supplied to the second heat exchanger 70 and the second heat exchanger 70, And is supplied to the three-phase separator 80 to be separated and discharged as a liquid waste oil, a heavy liquid waste water, and a solid solid, and the amount of the waste oil mixed with the sludge supplied to the second heat exchanger 70 Is supplied to the crude oil storage tank (10) after the crude oil is supplied from the oil refining tank (30a) as much as the first oil storage tank (30a) and heated by the first heat exchanger (40).
delete delete delete A waste oil tank 20 for receiving and storing waste oil;
A washing water tank 30b for storing wash water for washing;
A first heat exchanger (40) which receives washing water or waste oil from the washing water tank (30b) and heats it to 50 to 70 캜;
Cleaning water or waste oil heated by the first heat exchanger 40 is supplied to the interior of the crude oil storage tank 10 so that the sludge remaining in the crude oil storage tank 10 is cleaned and the sludge- (50);
The waste washing water is circulated and supplied to the first heat exchanger 40 and the scrubber 50 by the scrubber 50 in the crude oil storage tank 10 to be washed, (60b) for separating the waste oil and the waste washing water by the specific gravity difference by keeping the waste washing water when the pressure supplied to the washing machine of the washing machine becomes a predetermined value or more.
A second heat exchanger (70) supplied to the waste oil tank (20) and supplied with the remaining waste washing water and heating the waste oil to 70 to 90 캜;
5 to 15 vol.% Of the waste washing water mixed with the waste oil supplied from the first heat exchanger 40 to the scrubber 50 is supplied to the second heat exchanger 70 and the second heat exchanger 70 The washing water is supplied from the washing water tank 30b to the crude oil storage tank 10 after being heated in the first heat exchanger 40 by the amount of the waste washing water mixed with the waste oil supplied to the crude oil storage tank 10, The three-phase separator (80) separates waste liquid supplied to the two-heat exchanger (70) from the waste liquid and supplies the liquid waste oil to the waste oil tank (20).
And an oil reservoir tank cleaning device for cleaning the crude oil storage tank. delete delete delete delete

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