KR102022937B1 - Recovery device of petroleum vapor generated in underground thermal desorption - Google Patents

Abstract

The present invention relates to an apparatus for recovering petroleum-based vapor generated from geothermal desorption, which comprises: a gas-liquid separation unit connected in series or in parallel with a unit consisting of a condenser in which contaminated gas generated by geothermal desorption is liquefied and a gas-liquid separator in which the liquefied contaminated gas is introduced from the condenser so that gas-liquid separation is performed; an oil-water separator for separating the oil and water by receiving the liquid separated from the gas-liquid separator; and an oil tank for receiving and storing the oil from the oil-water separator.

Description

Recovery device of petroleum vapor generated in underground thermal desorption}

The present invention relates to a petroleum vapor recovery system for separating and re-using the oil in the treatment of the polluting gas generated in the ground heat desorption.

Since the Industrial Revolution, today's industry has been developed almost entirely on fossil fuels, but today, the environmental pollution that accompanies the development of the industry is a serious problem that threatens human life.

Soil pollution is a very serious threat to food production and cause water pollution through groundwater contamination, as well as the pollution is not easy to handle.

Today's industry is based on machinery, and almost every machine needs oil, such as lubricants and fuels. In particular, the amount of oil consumed by various vehicles, which is one of the most essential things in modern life, is consumed so much that the quantity cannot be measured, and a considerable amount of oil is transferred to the outside due to carelessness in transportation, storage, and use of the oil. The situation is seriously polluted with the outflow.

As the soil contaminated by oil requires a considerable period of time to recover naturally, when the soil is contaminated, the serious problem of depleting the drinking water by polluting the groundwater as well as causing a fatal adverse effect on the production of various agricultural products. Will cause.

As an example of the technology to purify the contaminated soil, underground thermal desorption contaminated soil purification technology has been proposed. The underground thermal desorption contaminated soil purification technology is a 'heating technology through in-situ thermal treatment' to purify unsaturated and high concentration oil contaminated areas in a short period of time. And 'recovery technology for petroleum vapor generated during heat treatment'.

As an example of the existing technology, Korean Patent Registration No. 0798763 includes digging a plurality of injection holes and extraction holes in an oil-contaminated soil (100); Injecting hot fluid into the contaminated soil through the injection hole (200); Sucking (300) a mixed fluid of a high temperature fluid and a contaminant in the extraction hole; Gas-liquid separation of the mixed fluid into a contaminated liquid and a contaminated gas (400); Separating the contaminated liquid into water and oil (500); An underground thermal desorption method for oil polluted soil purification, which comprises the step 600 of adsorption removal of volatile contaminants contained in the polluted gas, has been proposed.

However, in the case of the above technology, it is not possible to expect a degree of oil recovery to enable immediate reuse without any further action through the separation of high purity oil.

Republic of Korea Patent Registration No. 0798763

The present invention has been made to solve the above problems, it is to provide an oil vapor recovery apparatus that can separate and reuse the oil without additional post-treatment in treating the polluting gas generated in the ground heat desorption.

The petroleum vapor recovery apparatus (hereinafter referred to as "the apparatus of the present invention") generated in the underground thermal desorption of the present invention for achieving the above object is a condenser in which the contaminated gas generated by the ground thermal desorption is liquefied and liquefied from the condenser A gas-liquid separator in which a unit configured as a gas-liquid separator for introducing polluted gas to perform gas-liquid separation is connected in series or in parallel; Oil and water separator for separating the oil and water by receiving the liquid separated from the gas-liquid separator; It characterized in that it comprises a; oil tank receiving and storing the oil from the oil separator.

As an example, a centrifugal separator is configured between the oil separator and the oil tank. The centrifugal separator includes a partition wall in which a flow path is formed and is divided into an upper chamber and a lower chamber, and communicates with the lower chamber in a lateral direction. A housing in which the inflow pipe and the lower chamber communicate with the inflow pipe and the foreign matter discharge pipe through which the foreign substances are discharged, and the discharge pipe through which the treated oil is discharged while communicating with the upper chamber in the side; A filtration tube communicating with the flow passage in the upper chamber and having a plurality of filtration paths; And a foreign matter collecting hole communicating with the foreign substance discharge pipe and exposed to the inside of the lower chamber, wherein a first foreign substance inlet hole is formed on a side thereof and a second foreign substance inlet hole is formed on an upper surface thereof.

As one example, the filter passage is hinged at a central portion, and the body is hinged at the filter passage, and the spring end is protruded laterally from the body at both sides of the hinge coupling to contact the filter tube at the time of hinge linkage of the body. It is characterized in that the aggregation control bar consisting of.

As an example, the oil tank is filled with activated carbon whose surface is modified with polyvinyl pyrrolidone vinyl acetate copolymer (PVP-VA).

Therefore, the device of the present invention has the advantage that can be immediately utilized as an energy source by separating the pure oil from the polluting gas generated as a result of the geothermal desorption.

1 is a schematic representation of a device of the present invention.
2 is a partial view showing one embodiment of the apparatus of the present invention;
3 is a schematic view showing an operating state of the centrifuge shown in FIG.
4 is a view showing one embodiment of the centrifuge shown in FIG.

Hereinafter, the solid-liquid separator of the present invention will be described in detail with reference to the accompanying drawings.

The apparatus 100 of the present invention is a condenser 111 in which the contaminated gas generated by the ground heat desorption is liquefied and the liquefied contaminated gas from the condenser 111 is introduced into the gas-liquid separator 112 so that gas-liquid separation is performed. A unit consisting of a gas-liquid separator 110 connected in series or in parallel; Oil and water separator 120 for separating the oil and water by receiving the liquid separated from the gas-liquid separator 110; It characterized in that it comprises a; oil tank (130) for receiving and storing the oil from the oil water separator (120).

The gas-liquid separator 110 is composed of a combination of units consisting of the condenser 111 and the gas-liquid separator 112, characterized in that these units are connected in parallel or in series.

1 shows an example of a series connected in series, the contaminated gas generated by ground heat desorption flows into the condenser 111 to be liquefied, and the contaminated gas liquefied from the condenser 111 flows into the gas-liquid separator 112. The gas separated in the previous unit is liquefied by flowing into the condenser 111 of the rear end unit, and the contaminated gas liquefied from the condenser 111 is introduced into the gas-liquid separator 112 and the gas-liquid separated. Separation will be made.

In this process, the liquid separated in the gas-liquid separator 112 at the front end and the liquid separated in the gas-liquid separator 112 at the rear end are introduced to the oil / water separator 120.

Although not shown in the drawings, if the units are connected in parallel, the polluted gases generated by the ground heat desorption are liquefied into the condenser 111 of each unit, and the liquefied polluted gases from the condenser 111 are respectively gas-liquid separators. Is introduced into (112) is to be separated gas-liquid. In this process, the liquid separated from each of the gas-liquid separator 112 is to be introduced into the oil-water separator 120.

The condenser 111 corresponds to a configuration in which the gas separated from the contaminated gas generated by ground heat desorption or the gas-liquid separator 112 at the front end is liquefied, and the condenser 110 has various known technologies. Detailed description of the mechanism of action is omitted.

The contaminated gas liquefied through the condenser 111 is a mixed fluid in which a contaminant in which oil, contaminated water, etc. are mixed and volatiles generated in the oil are mixed, and the mixed fluid passes through the gas-liquid separator 112. Gas-liquid separation is carried out with contaminants mixed with contaminated water and volatile components generated from oil. In the case of the gas-liquid separator 112, various known techniques exist, so a detailed description thereof will be omitted.

As such, the contaminated liquid as a liquid separated through the gas-liquid separator 112 is introduced into the oil / water separator 120 at the rear end, and volatiles generated in the oil as gas are not shown in the drawing, but are post-treated in an incinerator. To lose.

The oil / water separator 120 is a liquid separated through the gas-liquid separator 112 so that the contaminant is introduced into oil and water to be separated, and the separated oil is delivered to the oil tank 130 at the rear end, so that the separated oil is energy. It is intended to be reused as a circle, and the separated water is not shown in the drawings, but the after-treatment is performed through a water treatment device or the like. In the case of the oil-water separator 120, various known technologies exist, so a detailed description thereof will be omitted.

Meanwhile, in the present invention, as shown in FIG. 2, the centrifuge 1 is configured between the oil / water separator 120 and the oil tank 130.

That is, the oil separated from the oil separator 120 is subjected to the centrifuge 1 so that only the oil having been removed from the oil tank 130 is stored, and the oil stored in the oil tank 130 is directly reused. It is to make it possible.

To this end, the present invention provides a centrifugal separator (1) capable of removing according to particle size in addition to removal according to specific gravity in removing foreign matters mixed in oil as shown in FIGS. 3 and 4.

As shown in FIG. 3, the centrifugal separator 1 is divided into an upper chamber 5 and a lower chamber 4 formed with a partition wall 24 in which a flow path 241 is formed, and communicates with the lower chamber 4 laterally. The oil inflow from the oil separator 120 and the inlet pipe 21 and the lower chamber (4) is communicated with the lower side and the foreign matter discharge pipe 23 and the upper chamber (5) to communicate with the side from the side and treated oil is A housing 2 in which a discharge pipe 22 is discharged; A filtration tube (6) communicating with the flow passage (241) in the upper chamber (5) and having a plurality of filtration passages (61); The foreign matter collecting hole (7) communicating with the foreign substance discharge pipe (23) and exposed to the inside of the lower chamber (4) but having a first foreign substance inlet (71) formed at a side thereof, and a second foreign substance inlet (72) formed at an upper surface thereof. It characterized by including.

In the housing 2, the lower chamber 4 is cylindrical, and the oil flowing therein flows back. The inlet pipe 21 is formed on one side of the lower chamber 4, it will be preferably configured in the tangential direction of the lower chamber (4).

In this way, the oil flowing into the inlet pipe 21 is allowed to flow in the lower chamber 4 so that hydrocyclon and vortex are generated.

In addition, as shown in the drawing, the lower surface of the lower chamber 4 preferably forms an inclined gradient such that the diameter becomes narrower toward the center, which is the particle S1 falling from the lower chamber sidewall by centrifugal force due to the flow below. In addition to easily slipping in the direction of the foreign matter collecting hole 7 to be described, as the diameter decreases, the flow velocity increases so that the vortex velocity increases toward the lower side of the lower chamber 4 so that the particles S2 are formed. This is to facilitate the inflow into the foreign matter collecting port (7).

The foreign matter collecting hole (7) is formed in the center of the lower surface of the lower chamber (4), which also communicates with the foreign matter discharge pipe (23) in the shape of an inverted conical shape that decreases in diameter downward.

In addition, the foreign matter collecting hole 7 is formed in a conical shape protruding from the lower surface of the lower chamber 4, the first foreign material inlet hole 71 is formed on the side and the second foreign material inlet hole ( 72 is formed, so that the second foreign matter inlet hole 72 serves to hold the core C in the center of the vortex as shown in FIG. 3. In addition, as shown in FIG. 3, the first foreign matter inflow hole 71 serves as a passage through which the particles S1 moving on the lower surface of the lower chamber 4 move to the foreign matter collecting hole 7.

The upper chamber 5 is also configured to have a cylindrical shape, but is configured on the lower chamber 4 to be divided by the partition wall 24 as mentioned above.

In the upper chamber 5 is formed a filtration tube 6 in communication with the flow path 241 and a plurality of filtration passages 61 are formed.

The partition wall 24 preferably has a conical shape in which an upward inclination gradient is formed in the center direction, that is, in the direction in which the filtration pipe 6 is configured. By doing so, the treatment oil Q1 passing through the filtration pipe 6 is easily flowed out of the outlet pipe 22 through the partition wall 24. In the lower chamber 4, the conical partition wall 24 is provided. As a result, the diameter becomes smaller toward the upper direction, and the speed of the return flows due to this shape, so that the processing speed also increases as the speed of return flows in the filter tube 6.

Hereinafter, the operating state of the centrifuge 1 will be described with reference to FIG. 3.

As shown in FIG. 3, the inflow pipe 21 is configured in the tangential direction of the lower chamber 4 so that the inflow oil Q obtained through the inflow pipe 21 naturally forms a flow without any power. The flow path of the particles S1 having a larger specific gravity than the inflow oil Q due to such a flow moves to the side wall of the lower chamber 4 by centrifugal force, and rides on the lower surface of the lower chamber 4 to the foreign matter collecting hole 7. It is discharged to the second foreign matter inlet hole 72 by the suction force of the first foreign matter inlet hole 71 or the core (C) is moved to the foreign matter discharge pipe (23).

This flow generates a vortex, and the center of the vortex generates a portion of the core (C) that rotates at a speed more than twice the tangential flow rate, the core (C) is formed on the upper surface of the filter tube (6) It is a cavity that is connected from the opening to the second foreign matter inlet hole 72 is a portion where strong suction force is generated in the downward direction.

Therefore, in the case of the movement path of particles (S2) whose specific gravity is smaller than the inflow oil, the specific gravity moves toward the water surface by the centripetal force as opposed to the movement path of the particles (S1) which are larger than the inflow oil. The outflow to the foreign matter collecting port 7 by the suction force downward.

In addition, the moving path of the particles (S3) having a specific gravity similar to the inflow oil is moved according to the flow of the inflow oil (Q), which flows into the inside of the filtration tube 6 and floats according to the flow of the fluid, 61 is introduced into the upper chamber (5).

In this process, the floc formed by the cohesion between foreign matters is filtered so that the particles eventually reach the core C and flow out into the foreign matter collecting hole 7. That is, the filter tube 6 is to be sorted according to the size of the particles.

In addition, in the present invention, as shown in FIG. 4, the agglomeration control bar 8 is formed in the filtration tube 6 so that the agglomeration is carried out by hinge linkage by elastic restoration of the agglomeration control bar 8 in the filtration furnace 61. By splitting the foreign matter so as to control the overflow, equipment failure, etc. due to clogging of the filtration furnace (61).

That is, when the filtration furnace 61 in the filtration tube 6 is blocked by the deposition of foreign substances, it is for controlling the problem such that the oil which has not been filtered out overflows and lowers the purity.

The coagulation control bar 8 is a hinge coupling 81 at the center portion of the filtration passage 61, and the body 82 for hinge interlocking in the filtration passage 61 and the body at both sides of the hinge coupling 81. Protruding in the lateral direction at (82), respectively, characterized in that it is composed of a spring end 83 in contact with the filtration tube (6) during hinge interlocking of the body (82).

When the fluid flows to the filtration furnace 61, the body 82 is hinged. In this hinge coupling process, the spring end 83 is connected to the filtration pipes 6 on both sides of the filtration furnace 61. The body 82 is to seesaw movement by the elastic restoring force of the spring end 83 while hitting).

The vibration energy is imposed on the fluid by the seesaw motion of the body 82. The vibration energy is used to split the flocculated foreign matter to control the blockage of the filtration furnace 61 as mentioned above. It is to increase the purity of the oil by allowing the foreign matter mixed in the oil to be separated by the imposition of energy to be discharged to the outside by the above-mentioned path.

As described above, the oil Q1 introduced into the upper chamber 5 is discharged through the discharge pipe 22. The oil Q1 has a specific gravity or a small foreign material removed therefrom and a large particle foreign material is removed. .

By the way, in the case of the oil (Q1) discharged from the centrifuge (1) as described above, the foreign matter similar to the specific gravity of the oil (Q1) is mixed state in the present invention is also stored in the oil tank 130 to remove such foreign matters More examples are provided to further increase the purity of the oil.

To this end, although not shown in the drawings in the present embodiment, the oil tank 130 has an example in which activated carbon whose surface is modified with polyvinyl pyrrolidone vinyl acetate copolymer (PVP-VA) is filled.

Activated carbon whose surface is modified with a polyvinyl pyrrolidone vinyl acetate copolymer (PVP-VA) may be configured to be filled in the oil tank 130 or to form a separate filtration layer.

The reason why the activated carbon whose surface is modified with the polyvinyl pyrrolidone vinyl acetate copolymer (PVP-VA) is placed in the oil tank 15 is the oil (Q1) discharged from the centrifuge 1 as mentioned above. In the case of the foreign matter similar to the oil (Q1), the foreign matter is mixed, where the foreign matter mixed in the oil (Q1) will be mainly volatile organic compounds and to facilitate the removal by adsorption of these volatile organic compounds will be.

Activated carbon surface-modified with PVP-VA increases the adsorption rate of volatile organic compounds such as TCE having hydrophobicity by coating PVP-VA on the activated carbon. Activated carbon whose surface has been modified with polyvinyl pyrrolidone vinyl acetate copolymer (PVP-VA) is obtained by immersing activated carbon in a PVP-VA solution in which PVP-VA is mixed and dissolved in DDIW.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

100: device 110 of the present invention: gas-liquid separator
120: oil and oil separator 130: oil tank

Claims (4)

A gas-liquid separator connected to a condenser in which contaminated gas generated by ground heat desorption is liquefied and a gas-liquid separator in which liquefied contaminated gas is introduced from the condenser to perform gas-liquid separation;
Oil and water separator for separating the oil and water by receiving the liquid separated from the gas-liquid separator;
An oil tank for storing oil received from the oil water separator;
It includes; a centrifugal separator configured between the oil water separator and the oil tank;
The centrifuge,
The partition wall formed with a flow path is partitioned into an upper chamber and a lower chamber, and communicates with the lower chamber in a lateral direction, and communicates with the inflow pipe through which oil flows from the oil / water separator and the lower chamber with a foreign substance discharge pipe and an upper chamber. A housing in communication with the side and having a discharge pipe through which the processing oil is discharged;
A filtration tube communicating with the flow passage in the upper chamber and having a plurality of filtration paths; And
And a foreign matter collecting hole communicating with the foreign substance discharge pipe and exposed to the inside of the lower chamber, wherein a first foreign matter inlet hole is formed on a side thereof and a second foreign substance inlet hole is formed on an upper surface thereof.
The filter is hinged to the central portion in the center of the filter and the hinge is interlocked in the body, the hinge is coupled to each side protruding laterally from the body on both sides of the hinge coupling is composed of a spring end contacting the filter tube when the hinge interlocking of the body Apparatus for the recovery of petroleum vapor generated in the ground heat desorption characterized in that the control bar is formed.
delete delete The method of claim 1,
The oil tank is a polyvinyl pyrrolidone vinyl acetate copolymer (PVP-VA) of the petroleum vapor recovery device generated from geothermal desorption characterized in that the surface is filled with activated carbon modified.

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