KR101179673B1 - The Purification Device of Oil-Contaminated Soil - Google Patents

Abstract

PURPOSE: An oil polluted soil purifying apparatus is provided to evaporate oils and to reuse the evaporated oils by indirectly applying heat to oil polluted soil in a furnace. CONSTITUTION: An oil polluted soil purifying apparatus includes a hopper(110), a transferring unit(120), an evaporating unit(130), and an oil-water separating unit(140). The hopper stores oil polluted soil. The evaporating unit includes a main body(131), a burner(132), a plurality of partitions, and a plurality of mixing transferring units(134). A furnace is formed in the main body. The main body is in connection with the transferring unit. The burner is installed in the furnace to heat the furnace. The partitions are vertically installed to the bottom of the main body in order to divide the furnace. The mixing transferring units parallelly arranged on the upper sides of the partitions.

Description

Purification Device of Oil-Contaminated Soil

The present invention relates to an oil polluting soil purification apparatus that can clean the environment contaminated with oil.

Recently, due to rapid industrial development and economic development, environmental pollution is becoming a big problem all over the world. These environmental pollutions appear in various phases such as air pollution, water pollution, marine pollution, soil pollution, etc. Of these, serious environmental pollution problems occur at the stage of oil refining, transportation, storage and consumption due to the exponential increase of oil consumption. It is caused.

In particular, soil contamination by oil is mainly caused by oil leaks from gas stations, reservoirs, and oil storage facilities such as military facilities, aging and accidents of related industries such as petrochemical plants, and illegal landfilling of oil. Once the soil is contaminated with oil, it is very expensive and time consuming to clean it up and restore it.

If the soil contaminated with oil is left unusable, the pollution itself spreads to the groundwater and nearby rivers as well as the use of the soil itself. Therefore, the purification and restoration of the contaminated soil is an important problem.

Accordingly, various attempts have been made to restore and regenerate soil contaminated with oil. Among them, an incineration method (for example, US Patent No. 5,302,118 Soil remediation apparatus) which incinerates oil attached to soil by directly applying a flame to contaminated soil is used. By generating sulfur oxides and nitrogen oxides as combustion by-products, there is a problem in that pollutants move to the atmosphere.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an oil polluting soil purification apparatus that can environmentally treat pollutants.

Oil contaminated soil purification apparatus according to an aspect of the present invention to achieve the above object,

A hopper for storing soil contaminated with oil;

A transfer device installed integrally with the hopper to transfer the contaminated soil stored in the hopper;

A main body connected to the transfer device to form a furnace therein, a burner installed inside the furnace of the main body to heat the furnace, a plurality of separation walls arranged to be perpendicular to the bottom of the main body to partition the inside of the furnace; And an evaporator connected to an end of the transfer device, the evaporator comprising a plurality of stirring transferers disposed continuously in parallel to the contaminated soil in the main body and continuously conveying contaminated soil in the main body; And

A housing in communication with an upper portion of the main body of the evaporator, a collection conductor which induces a flow of steam into the housing to collect according to specific gravity of the gas, a water discharge pipe for discharging water collected at the bottom of the housing, Oil and water separation device consisting of a gas discharge pipe for discharging the gas to the upper portion of the housing;

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The ceiling inside the main body is formed to be inclined, and characterized in that at least one perforated part is formed to discharge steam collected at the highest position.

The evaporator further comprises an impeller installed on one side of the ceiling inside the body.

One side of both sides of the separation walls, characterized in that open to cross each other.

The bottom of the oil-water separator is characterized in that the steam inlet pipe communicating with the perforations formed in the ceiling of the main body is installed.

The collecting conductor is installed to be inclined upward in the center direction from the inside of the housing, characterized in that it is installed in at least two stages or more.

The present invention is characterized in that it further comprises a cooling device having an inclined pipe for collecting the gas collected from the collection guide of the oil-water separator.

An impeller rotating in one direction is installed inside the inclined pipe.

As described above, according to the oil polluting soil purification apparatus according to the present invention, by indirect heat to the soil contaminated with oil in the furnace by treating the oil by evaporation, it is possible to prevent air pollution due to incineration of conventional oil, There is an advantage in that oil can be reused as a heat source.

1 is a view showing a device for purifying oil contaminated soil according to an embodiment of the present invention (not shown in the separating wall),
Figure 2 is a cross-sectional view showing the inside of the main body of the evaporator of Figure 1,
3 is a plan view of FIG. 2 and FIG.
Figure 4 is a process chart of the oil pollution soil purifying apparatus according to an embodiment of the present invention.

Hereinafter, an oil purification apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.

As shown in Figure 1, the oil contaminated soil purifying apparatus according to an embodiment of the present invention is a hopper 110, the transfer device 120 is installed integrally with the hopper 110, the transfer device 120 Evaporator 130 is connected to, the oil and water separator 140 is connected to the upper portion of the evaporator 130, the cooling device 150 is connected to the oil and water separator 140, cooling tower 160, water storage A tank (not shown), an oil storage tank (not shown), a gas storage tank (not shown), and a discharge device 170 connected to the evaporator 130.

First, the hopper 110 is excavated in the soil contaminated by oil (S1, Fig. 4) is crushed (S2) to a size suitable for screw transport (S2), and then stored in the interior through the screening process (S3) ( S4) provides a container that can be.

The hopper 110 is installed integrally with the transfer device 120 to block the inside of the evaporator 130 from the outside air. At this time, the vibrator may be mounted on one side of the hopper 110 to smoothly transport and increase the density of the contaminated soil in the hopper 110. During operation of the apparatus, the soil is always filled with a proper amount of contaminated soil. The inside of the evaporator 130 may be sealed from the outside air.

In addition, the transfer device 120 is installed between the hopper 110 and the evaporator 130 and the contaminated soil stored in the hopper 110 by a screw that is rotated by the drive of the motor to the evaporator 130. ) Is installed to transfer (S5) inside. In particular, the transfer device 120 is installed to be sealed in a tubular shape to transfer while blocking the inflow of external air into the evaporator (130). In this case, an end portion of the transfer device 120 connected to the evaporator 130 may be bent downward to prevent backflow of contaminated soil introduced into the evaporator 130.

In addition, the evaporator 130 is a main body 131 to form a furnace (furnace) of a predetermined size therein, a burner 132 is installed on one side of the bottom of the main body to heat (S6) the furnace, and the At least one separation wall 133 which is installed perpendicular to the bottom of the main body 131 and partitions the inside of the furnace and connected to the end of the transfer device 120 to stir transfer the contaminated soil, and then to be discharged to the outside of the furnace. It comprises a conveyor 134.

The main body 131 is composed of a refractory heat insulating material, and when the inside of the furnace is heated by the operation of the burner 132 and the temperature inside the furnace is sensed to be 300 ° C. or more through a temperature sensor not shown, the transfer device 120. ) Operation can be controlled so that contaminated soil can be introduced into the furnace.

The ceiling inside the main body 131 is formed to be inclined like a hanok roof, and at least one perforated part 131a is formed to discharge steam collected at the highest position of the ceiling to the outside. Therefore, the oil, water, gas, and the like, which are evaporated inside the evaporator 130 through the punching part 131a, may be smoothly discharged.

As shown in FIGS. 2 and 3, the bottom of the main body 131 is formed stepped along the discharge path of the contaminated soil (in the direction of the arrow in FIG. 3), so that the thermal efficiency of the furnace decreases toward the discharge side of the contaminated soil. It can be supplemented.

In addition, the burners 132 may be provided in plural as shown, and in some cases, may be installed in a single number having a large capacity.

When the temperature inside the furnace of the main body 131 is maintained at 300 ° C. or more, the dividing wall 133 generally starts to evaporate oil and water from one cycle. It is installed to partition the inside of the furnace so that it can be quickly sent to the oil and water separator (140).

For example, the dividing wall 133 may be divided into a first dividing wall 133a, a second dividing wall 133b, a third dividing wall 133c, and the like. At the upper end of the extension plate 133a-1 extending to the ceiling inside the main body 131 and directly guiding the oil, water, gas, etc. evaporated in one cycle to the perforations 131a inside the main body 131. Can be installed. The extension plate 133a-1 may be installed on the upper ends of the second separation wall 133b and the third separation wall 133c.

In addition, one side of both sides of the separation wall 133 is open to cross the heat of the burner 132 which is operated along the discharge path of the contaminated soil is transmitted to the zigzag. At this time, the height of the first separation wall 133a, the second separation wall 133b, and the third separation wall 133c is preferably installed to be in direct contact with the stirring feeder 134.

The stirring transporter 134 is installed in plurality between the separation walls 133 are connected in parallel, the two are installed so that the transfer agitation of approximately five cycles in one set can be repeated, the degree of contamination of the soil As a result, the operation speed is controlled to control the transport speed of the contaminated soil. As the upper part of the stirring feeder 134 is opened and the contaminated soil is transported and agitated, oil, moisture, gas, etc. attached to the contaminated soil may be evaporated to an upper portion when the furnace internal temperature of the main body 131 is 300 ° C. or more. .

In addition, the evaporator 130 is installed on one side of the ceiling inside the main body 131, the impeller 135 is rotated in one direction in order to quickly discharge the evaporated oil, water, gas, etc. to the perforations 131a. It may include.

On the other hand, the oil-water separator 140 is a device for collecting and separating (S7) the oil, water, gas, etc. generated in the evaporation device 130 into the housing 141, Inside there is a temperature sensor T for measuring the internal temperature and a pressure gauge P for measuring the internal pressure.

Inside the housing 141 of the oil and water separator 140 is installed a collecting conductor 142 that can be collected according to the specific gravity of the gas by inducing the flow of steam, the pressure inside the safety valve not to exceed 5kg / ㎠ To the gas storage tank when the safety valve is operated due to abnormal pressure. At this time, the gas collected by the collecting inductor 142 opens and decompresses the gate valve to the next cooling device 150. In particular, the collection guide 142 is installed at an inclined upward in the center direction from the inside of the housing 141, as shown in Figure 1 is installed in at least two stages so that it can be collected from a high specific gas to a low gas desirable.

In addition, a vapor inlet tube 143 communicating with a perforation part 131a formed in a ceiling inside the main body 131 is installed outside the bottom of the oil / water separator 140, and discharges water collected at the bottom thereof. Water discharge pipe 144 for is installed.

In addition, a gas discharge pipe 145 for discharging the gas in the state of the lowest specific gravity is installed in the upper portion of the oil-water separator 140. In this case, the gas discharged to the gas discharge pipe 145 may be directly used as a heat source of the burner 132.

At this time, the safety valve (V) is a safety device that automatically opens the valve when the pressure in the steam pipe rises above the prescribed value to take out the excess steam.

In addition, the cooling device 150 collects the gas collected from the oil-water separator 140 through the inclined pipe 151, the liquid phase using the cooling water supplied through the cooling water supply pipe 161 of the cooling tower 160 Cooling (S8). An impeller 152 rotating in one direction may be installed in the inclined pipe 151 to quickly guide the gas to the cooling device 150.

In addition, the cooling device 150, as shown in Figure 1, consists of all three stages, the liquid phase and residual gas is discharged in the last stage. It can also be equipped with pressure gauges, temperature sensors, safety valves.

As another device, the water storage tank stores water generated in each process (S9), and the water is sent to the cooling tower 160 through a filtration device (S9 ') to be used as a refrigerant of the cooling device 150. The oil storage tank reuses the gas generated by storing and pressurizing the oil separated from the cooling device 150 as a heat source of the burner 132 of the evaporator 130, and the remaining gas tank. Stores all residual gas generated in the process (S11) and reuses it as a heat source of the burner 132 of the evaporator 130 as well.

The discharging device 170 is connected to the last step of the stirring conveyor 134 stepped to prevent the backflow of contaminated soil discharged to the outside of the evaporator 130, the discharge of contaminated soil (S12) is It operates continuously while blocking the inflow of outside air into the furnace. At this time, the discharge of polluted soil can withstand the high temperature by using a screw feeder, and in this process, the water of the purified soil is cooled and discharged by using a water-cooled heat exchanger in the outer casing of the screw feeder, but discharged by treating the purified soil with microorganisms if necessary. do.

According to the purification apparatus of the oil-contaminated soil of the present invention as described above, by applying indirect heat to the soil contaminated with oil in the furnace by evaporating the oil to purify, it is possible to prevent the air pollution caused by the incineration of conventional oil, Can be reused as a heat source.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto, and the technical spirit of the present invention and the equivalents of the claims to be described below by those skilled in the art to which the invention pertains. Of course, various modifications and variations are possible within the scope.

Claims (8)

Hopper 110 in which contaminated soil contaminated with oil is stored;
A transfer device 120 installed integrally with the hopper 110 to transfer the contaminated soil stored in the hopper 110;
A main body 131 connected to the transfer device 120 and forming a furnace therein, a burner 132 installed in the furnace of the main body 131 to heat the inside of the furnace, and a bottom of the main body 131. A plurality of separation walls 133 installed perpendicularly to the furnace and connected to an end of the transfer device 120 to continuously stir and transport contaminated soil in the main body 131. Evaporator 130 consisting of a plurality of stirring transporter 134 disposed in parallel to the top of the; And
A housing 141 which communicates with an upper portion of the main body 131 of the evaporator 130, a collection conductor 142 which induces a flow of steam into the housing 141 to collect according to the specific gravity of the gas, and the housing An oil and water separator (140) configured to include a water discharge pipe (144) for discharging water collected at the bottom of the (141) and a gas discharge pipe (145) for discharging the gas to an upper portion of the housing (141);
Oil contaminated soil purification apparatus comprising a. According to claim 1, The ceiling inside the main body 131,
It is formed to be inclined, at least one perforated portion (131a) for discharging the oil collected in the highest position is characterized in that the oil pollution soil purifier. The method of claim 2, wherein the evaporator 130,
Oil contaminated soil purification apparatus further comprises an impeller (135) installed on one side of the ceiling inside the main body (131). The method of claim 1, wherein one side of both sides of the separation walls 133,
Oil polluting soil purification apparatus, characterized in that open to cross each other. The bottom of the oil-water separator 140,
The oil contaminated soil purification apparatus, characterized in that the vapor inlet pipe 143 is installed in communication with the perforations (131a) formed on the ceiling of the main body (131). The method of claim 1, wherein the collection guide 142,
The oil contaminated soil purification apparatus is installed inclined upward from the inner side of the housing (141) to at least two stages. The method of claim 1,
And a cooling device (150) having an inclined conduit (151) for collecting the gas collected from the collecting inductor (142) of the oil / water separator (140). According to claim 7, Inside the inclined pipe 151,
Oil contaminated soil purification apparatus, characterized in that the impeller 152 is rotated in one direction.

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