JP2004202347A - Polluted soil treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polluted soil treatment apparatus constituted so that a heavy volatile component can be prevented from adhering to the inner wall of a drying drum to be cured and the clogging of a bag filter with the heavy volatile component can be prevented. <P>SOLUTION: The polluted soil treatment apparatus includes the drying drum (20) for heat-treating polluted soil (3) which is polluted with heavy oil and a solid matter supply mechanism (10: for example, a first belt conveyor for charging solid matter and a second belt conveyor for charging soil/solid matter) for supplying the solid matter (5), which removes the pollutant component like the solidified matter of a heavy oil volatile component adhering to the inner wall of the drying drum (20), to the drying drum (20). <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for cleaning soil contaminated with heavy oil. More specifically, the present invention relates to a contaminated soil treatment apparatus capable of treating soil contaminated with heavy oil at a low temperature.
[0002]
[Prior art]
Conventionally, an apparatus for purifying soil contaminated with oil has separated and decomposed volatile substances having a low boiling point from a soil contaminated with light oil such as kerosene or light oil by a drying drum.
[0003]
However, the oil quality of contaminated soil is not limited to light oil, but the oil industry facility site has been contaminated with heavy oil such as crude oil and heavy oil, and the various industrial factory sites have been lightened. It is a complex contaminated soil that is contaminated with heavy oil in addition to oil.
[0004]
When the soil contaminated with such heavy oil is purified by heat treatment, heating at a high temperature generates an oil film and an oily smell from the contaminated soil, which is not preferable because it causes a risk of living environment. Therefore, it is preferable to heat the contaminated soil at a low temperature.
[0005]
However, as described in, for example, JP-A-2002-263633, when soil contaminated with heavy oil is subjected to low-temperature heat treatment, heavy volatile components adhere to the inner wall of a drying drum that performs heat treatment. . Then, there is a problem that the attached volatile component (oil component) is hardened to provide a heat insulating effect, and it becomes difficult to efficiently perform a low-temperature heat treatment using a drying drum.
[0006]
In addition, when the soil contaminated with heavy oil is subjected to a low-temperature heat treatment, a volatile component of the heavy system causes an obstacle such as clogging of the bag filter. If the bag filter is clogged, there is a problem that the filter function is reduced and normal operation cannot be performed.
[0007]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been proposed in view of the problems of the prior art as described above, and is intended to provide a contaminated soil treatment apparatus capable of preventing a heavy volatile component from adhering to the inner wall of a drying drum and hardening. It is intended to be provided.
It is another object of the present invention to provide a contaminated soil treatment apparatus capable of preventing a heavy filter from clogging a bag filter.
[0008]
[Means for Solving the Problems]
The apparatus for treating contaminated soil according to the present invention comprises a drying drum (20) for heat-treating contaminated soil (3) (contaminated with heavy oil), and solidification of a heavy oil volatile component adhering to the inner wall of the drying drum. Solid supply mechanism (10) for supplying solids (5) to a drying drum (20) (for removing contaminant components such as solids) (for example, a first belt conveyor for charging solids, soil and (A second belt conveyor for charging solids) (claim 1).
[0009]
Further, the contaminated soil treatment apparatus of the present invention includes a drying drum (20) for heat-treating the contaminated soil (3) (contaminated with heavy oil). Solid matter (5) for removing contaminant components (such as solidified heavy oil volatile components adhered to the inner wall) is mixed in (claim 2).
[0010]
According to the present invention having such a configuration, the solid material plays a role like a ball in a ball mill for crushing a sample, and contaminant components such as solidified heavy oil volatile components adhered in the drying drum are removed. Since it has an action of knocking down, scraping off, and peeling off before solidification, even if a heavy volatile component adheres to the inner wall of the drying drum, it is removed by the solid matter at a stage before it is hardened.
[0011]
In other words, the solids have the effect of knocking, scraping, and stripping off contaminant components (such as solidified heavy oil volatiles) that have adhered to the inside of the drying drum before they solidify. What is necessary is just to do not damage the drying drum.
If the specific gravity of the solids is too low, it is difficult to remove such contaminant components before they solidify. On the other hand, if the specific gravity of the solid is too large, the drum may be damaged when supplied to the drying drum, which is inconvenient.
[0012]
Further, if the surface of the solid is too smooth, it is not suitable for removing contaminants. In addition, in order to prevent damage to not only the drying drum but also a hopper for supplying the drum and various devices connected to the drum, for example, an elevator, the size of the solid matter is preferably 100 mm or less at the maximum.
[0013]
Furthermore, the solids must be free from problems even when mixed with the treated soil. That is, it is necessary that there be no problem as a recycled material from an environmental point of view.
[0014]
The solid is preferably one that can be sorted by a sorting means such as a sieve so as not to adversely affect the environment as industrial waste.
Since the soil after the purification treatment is wet, a sorting means (for example, a vibrating sieve) that performs rotation or vibration is preferable.
[0015]
The apparatus for treating contaminated soil of the present invention comprises a drying drum (20) for heating contaminated soil (3) (contaminated with heavy oil) and a contaminant (including contaminants such as volatile components of heavy oil). Filter means (for example, a bag filter) for purifying exhaust gas (G) from the drying drum (20), and a powder supply mechanism (30) for supplying powder (Pw) for contaminant adsorption to the filter means ) (Powder charging tank, powder charging pipe, etc.).
[0016]
Here, the filter means has a filter (36) containing fibers as a main component, and the powder for adsorbing contaminants is located on the surface of the fiber without passing through the fibers of the filter (36). Further, it preferably has a property of adsorbing pollutants (volatile components of heavy oil) (claim 4).
[0017]
According to the present invention having such a configuration, a duct for guiding a contaminant which is a volatile component of heavy oil from a drying drum is communicated with a bag filter of a filter means having a filter made of a filter cloth mainly composed of fibers. It is preferable that a powder supply mechanism for spraying and injecting powder that adsorbs contaminants into the duct be provided. Preferably, the powder supply mechanism includes a powder input pipe communicating with the duct and a powder input tank communicating with the powder input pipe.
[0018]
The powder charging tank is installed near the bag filter of the filter means, and the powder is injected into the duct by a fixed amount and adheres to the filter cloth in the bag filter.
The heavy oil component in the dry gas sent from the drying drum is adsorbed and adsorbed on the powder when passing through the filter cloth, and hardly adheres directly to the filter cloth.
The heavy oil component adsorbed and adsorbed on the powder is periodically sieved through a vibrating sieve, and the powder is collected together with the dust.
[0019]
In addition to the above, in the contaminated soil treatment apparatus of the present invention, a drying drum for heat-treating contaminated soil (contaminated with heavy oil), and a contaminant (including contaminants such as volatile components of heavy oil) are provided. A filter means for purifying exhaust gas from the drying drum (for example, a bag filter); and a filter means for removing contaminant components such as solidified heavy oil volatile components adhering to the inner wall of the drying drum. A) a solid material supply mechanism (for example, a solid material feeding belt conveyor, a soil / solid material feeding belt conveyor) for supplying solid materials to the drying drum, and a powder supply mechanism for supplying the filter means with powder for contaminant adsorption. (Powder charging tank, powder charging pipe, etc.), and the filter means has a filter mainly composed of fiber, and the powder for adsorbing contaminants passes through the fiber of the filter. Without doing Located on the fiber surface, preferably it has a property of adsorbing contaminants (volatile component heavy oil).
Alternatively, instead of the solid material supply mechanism, a solid material for removing contaminant components (such as a solidified volatile component of heavy oil attached to the inner wall of the drying drum) may be mixed in the drum. good.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a first embodiment of the present invention.
The contaminated soil treatment apparatus 1 of the present invention includes a drying drum 20, a solid supply mechanism 10 for supplying solids to the drying drum 20, a bag filter 34 as a filter means, and a powder supply for supplying powder to the bag filter 34. The main configuration includes the mechanism 30, the cooling drum 40, and the storage silo 44.
[0021]
The solid material supply mechanism 10 includes a first belt conveyor 11 that conveys the solid material 5, a second belt conveyor 12, a hopper 14, and a fifth belt conveyor 16. The solid material 5 supplied by the solid material supply mechanism 10 preferably has a diameter of 100 mm or less as a measure of the weight for removing solids due to oil in the drying drum 20, and has an outer shape with a certain degree of corners. When circulating in the soil treatment device, a solid material that does not damage a hopper, an elevator, or the like is preferable. Further, it is preferable that the material has no property of deteriorating the environment when used for landfilling together with the purified soil 7.
[0022]
The second belt conveyor 12 is configured to convey the contaminated soil 3 accumulated at an appropriate place with the solid matter from the first belt conveyor 11 to the hopper 14 while carrying the mixed soil.
[0023]
The hopper 14 is configured to supply the contaminated soil 3 and the solid matter 5 to the drying drum 20 by a predetermined amount.
[0024]
The third belt conveyor 16 is configured to supply a predetermined amount of the contaminated soil 3 and the solid matter 5 from the hopper 14 to the drying drum 20 in a batch system.
[0025]
The drying drum 20 heats the contaminated soil 3 and the solid matter 5 with the drying gas at a predetermined low temperature at which an oil film and an oily odor do not occur while rotating and stirring the exhaust gas G containing the evaporated heavy oil from the duct 24 through the bag filter. 34, and is configured to discharge the dried and deoiled contaminated soil 3 and solid matter 5 from the discharge port 22.
[0026]
When the contaminated soil 3 is heated and dried in the drying drum 20, the solid matter 5 knocks down the oil attached to the inner wall of the drum 20 when the solid matter 5 is dropped by the rotation of the drum 20, and scrapes off the oil. As a result, the heat exchange between the contaminated soil 3 and the dry gas is normally performed without deteriorating the function of the drying drum 20, and the low-temperature heating treatment of the contaminated soil 3 containing heavy oil becomes possible. It is configured.
[0027]
An elevator 26 communicates with a cooling drum 40 through an inlet 28 at a discharge port 22 provided below the drying drum 20 on the opposite side of the duct 24.
[0028]
The cooling drum 40 is configured to cool the solid matter 5 supplied from the charging section 28 and the purified purified soil 7 to a predetermined temperature and to charge the solid matter 5 into a storage silo 44 installed adjacently.
[0029]
The storage silo 44 has a funnel section 44 formed at the bottom, and a predetermined amount of the purified soil 7 and the solid matter 5 cooled from the funnel section 44 is fed to the vibrating sieve 50 via a fourth belt conveyor 48 in a batch manner. It is configured to supply. In addition, the supply of the purified soil 7 and the solid matter 5 to the vibrating sieve 50 may be a continuous supply method as long as the accumulation place of the purified soil 7 is secured and the capacity of the fifth belt conveyor 52 is sufficient.
[0030]
The vibrating sieve 50 loads the purified soil 7 on the transport vehicle 9 in the illustrated example so as to drop the purified soil 7 leaving the solids 5 on the net rack by vibration and send the solids 5 to the fifth belt conveyor 52. It is configured to be carried out.
[0031]
The bag filter 34 has a well-known function and configuration of performing a filtering function with a filter cloth, and introduces an exhaust gas G containing a heavy oil component, which is a pollutant, from the duct 24 to filter the fiber mainly. The oil is separated by the cloth 36 and the harmless gas Gn is discharged from the exhaust device 38 to the outside.
[0032]
In the vicinity of the bag filter 34, a powder supply mechanism 30 for supplying a fine powder Pw as an inorganic material is provided.
[0033]
The powder supply mechanism 30 includes a powder input tank 31 that stores the powder Pw, a nozzle 33 that injects and injects the powder Pw into the duct 24, and a powder input pipe that connects the nozzle 33 and the powder input tank 31. 32, and is configured to supply a predetermined required amount of powder Pw to the bag filter 34 in accordance with the operation of the bag filter 34.
[0034]
The bag filter 34 causes the powder Pw to adhere to the filter cloth 36, causes the powder Pw adhered to the fibers of the filter cloth 36 to adsorb the heavy oil component in the exhaust gas G, and adsorbs the heavy oil component. The powder Pw is configured to be separated periodically or as needed by vibration or impact application, and to be collected together with dust.
[0035]
The operation of the contaminated soil treatment device having the above configuration will be described.
First, the contaminated soil 3 and the solids 5 supplied from the first belt conveyor 11 are mixed and loaded on the second belt conveyor 12 and put into the hopper 14. The hopper 14 supplies the contaminated soil 3 and the solid matter 5 to the drying drum 20 via the third belt conveyor 16 by a predetermined amount in a batch manner.
[0036]
In the drying drum 20, the heavy oil component in the contaminated soil 3 is converted into the purified soil 7 in which the exhaust gas G and the oil component are separated by low-temperature heating without generating an oil film and an oily odor. In this process, the volatile component of the heated heavy oil adheres to the inner wall of the drying drum 20 and solidifies if left as it is. Before the solidification, the solid 5 is beaten while rotating or falling with the rotation of the drum, It works by scraping and stripping to prevent solidification of volatile components of heavy oil. As a result, heat exchange between the contaminated soil 3 and the dry gas is performed normally, and low-temperature heat treatment becomes possible.
[0037]
The purified soil 7 from which the oil content has been separated from the drying drum 20 by the oil, is charged together with the solid matter 5 into the cooling drum 40 via the discharge port 22, the elevator 26 and the charging section 28 and cooled to an appropriate temperature. It is thrown.
[0038]
A predetermined amount of the purified soil 7 and the solid matter 5 is supplied to the vibrating sieve 50 from the funnel 44 of the storage silo 44 via the fourth belt conveyor 48 in a batch manner.
[0039]
In the vibrating sieve 50, the purified soil 7 is dropped while leaving the solids 5 on the net rack by vibration, loaded on the transport vehicle 9 and carried out, and the solids 5 are sent to the fifth belt conveyor 52.
The solid matter 5 accumulated on the fifth belt conveyor 52 is sent to the first belt conveyor 11 as a recycled material and reused.
[0040]
On the other hand, the exhaust gas G containing the heavy oil component evaporated and separated from the contaminated soil 3 by the drying drum 20 is guided to the bag filter 34 through the duct 24.
At this time, the powder Pw in the powder charging tank 30 is injected and injected into the duct 24 from a nozzle 33 provided at the end of the duct 24 on the side of the bag filter 34, and is dispersed in the bag filter 34.
[0041]
The powder Pw dispersed in the bag filter 34 adheres to the filter cloth 36, and adsorbs the heavy oil component in the exhaust gas G flowing thereafter together with the light oil component. The harmless gas Gn in the exhaust gas G from which the oil has been removed is discharged from the exhaust device 38 to the outside through the filter cloth 36.
[0042]
The powder Pw in which the heavy oil component is adsorbed together with the light oil component is dropped off from the filter cloth 36 by vibration or impact, and is collected together with dust.
[0043]
In this way, the soil portion of the contaminated soil 3 is recovered as harmless purified soil 7, and the heavy oil component is discharged as harmless gas Gn. Further, the solid matter 5 for ensuring the low-temperature heating treatment in the drying drum 20 is circulated in the contaminated soil treatment apparatus 1 and is used indefinitely.
[0044]
FIG. 2 shows a second embodiment of the present invention.
The contaminated soil treatment apparatus 2 according to the present invention includes a drying drum 20 in which the solids 5 are incorporated, a contaminated soil supply mechanism 10A for supplying the contaminated soil 3 to the drying drum 20, a bag filter 34 as filter means, and a bag filter 34. The main components are a powder supply mechanism 30 for supplying powder, a cooling drum 40, and a storage silo 44.
[0045]
The contaminated soil supply mechanism 10A includes a first belt conveyor 12A that conveys the contaminated soil 3, a hopper 14, and a second belt conveyor 16A. The solid material 5 built in the drying drum 20 preferably has a diameter size of 100 mm or less as a measure of the weight for removing solidified substances due to oil in the drying drum 20 and has an outer shape with some corners. Solids that do not damage the inner wall when circulating inside are preferred. Further, it is preferable that there is no property of deteriorating the environment when used for landfilling together with the purified soil 7 after completion of the construction.
[0046]
The first belt conveyor 12 </ b> A is configured to convey the contaminated soil 3 accumulated at an appropriate place to the hopper 14.
[0047]
The hopper 14 is configured to supply the contaminated soil 3 to the second belt conveyor 16A by a predetermined amount.
[0048]
The second belt conveyor 16 </ b> A is configured to supply a predetermined amount of the contaminated soil 3 from the hopper 14 to the drying drum 20.
[0049]
The drying drum 20 heats the contaminated soil 3 and the built-in solid 5 with a dry gas at a predetermined low temperature at which an oil film and an oily odor do not occur while rotating and stirring the exhaust gas G containing the evaporated heavy oil. Then, the air is sent to the bag filter 34 and the dried contaminated soil 3 is discharged from the discharge port 22 while leaving the solid matter 5 through the mesh 21.
[0050]
When the contaminated soil 3 is heated and dried in the drying drum 20, the solid matter 5 knocks down the oil attached to the inner wall of the drum 20 when the solid matter 5 is dropped by the rotation of the drum 20, and scrapes off the oil. As a result, the heat exchange between the contaminated soil 3 and the dry gas is normally performed without deteriorating the function of the drying drum 20, and the low-temperature heating treatment of the contaminated soil 3 containing heavy oil becomes possible. It is configured.
[0051]
An elevator 26 is connected to the cooling drum 40 via an inlet 28 of the cooling drum 40 at a discharge port 22 provided below the drying drum 20 on the opposite side of the duct 24.
[0052]
The cooling drum 40 is configured to cool the purified heated and purified soil 7 supplied from the charging section 28 to a predetermined temperature and to charge the purified soil 7 into a storage silo 44 installed adjacently.
[0053]
The storage silo 44 has a funnel portion 44 formed at the bottom, and a predetermined amount of the purified soil 7 cooled from the funnel portion 44 is externally supplied via a third belt conveyor 48A in a batch manner, and in the illustrated example, a transport vehicle. 9 to be carried out.
[0054]
The bag filter 34 has a well-known function and configuration of performing a filtering function with a filter cloth, and introduces an exhaust gas G containing a heavy oil component, which is a pollutant, from the duct 24 to filter the fiber mainly. The oil is separated by the cloth 36 and the harmless gas Gn is discharged from the exhaust device 38 to the outside.
[0055]
In the vicinity of the bag filter 34, a powder supply mechanism 30 for supplying a fine powder Pw as an inorganic material is provided.
[0056]
The powder supply mechanism 30 includes a powder input tank 31 that stores the powder Pw, a nozzle 33 that injects and injects the powder Pw into the duct 24, and a powder input pipe that connects the nozzle 33 and the powder input tank 31. 32, and is configured to supply a predetermined required amount of powder Pw to the bag filter 34 in accordance with the operation of the bag filter 34.
[0057]
The bag filter 34 adheres the powder Pw to the fibers of the filter cloth 36, adsorbs the heavy oil component in the exhaust gas G to the powder Pw adhered to the filter cloth 36, and adsorbs the heavy oil component. The structure is such that the powder Pw is separated by vibration, impact or the like, and collected together with dust. Therefore, it is configured such that the powder Pw adsorbing the heavy oil component can be removed regularly or as needed.
[0058]
The operation of the contaminated soil treatment device having the above configuration will be described.
First, the contaminated soil 3 is put into the hopper 14 by the first belt conveyor 12A.
The hopper 14 supplies the contaminated soil 3 by a predetermined amount to the drying drum 20 by the third belt conveyor 16.
[0059]
In the drying drum 20, the heavy oil component in the contaminated soil 3 is heated at a low temperature to convert the exhaust gas G and the oil component into the separated purified soil 7 free of oil film and oil odor. In this process, the volatile component of the heated heavy oil adheres to the inner wall of the drying drum 20 and solidifies if left as it is. Before the solidification, the solid 5 is beaten while rotating or falling with the rotation of the drum, It works by scraping and stripping to prevent solidification of volatile components of heavy oil. As a result, heat exchange between the contaminated soil 3 and the dry gas is performed normally, and low-temperature heat treatment becomes possible.
[0060]
The purified soil 7 from which the oil has been separated from the drying drum 20 is passed through a net 21, fed into a cooling drum 40 via a discharge port 22, an elevator 26 and a charging section 28, cooled to an appropriate temperature, and stored in a storage silo. 44.
[0061]
The purified soil 7 is loaded in a predetermined amount from the funnel portion 44 of the storage silo 44 to the transport vehicle 9 via the third belt conveyor 48A in a batch manner and is carried out.
[0062]
On the other hand, the exhaust gas G containing the heavy oil component evaporated and separated from the contaminated soil 3 by the drying drum 20 is guided to the bag filter 34 through the duct 24.
At this time, the powder Pw in the powder charging tank 30 is injected and injected into the duct 24 from a nozzle 33 provided at the end of the duct 24 on the side of the bag filter 34, and is dispersed in the bag filter 34.
[0063]
The powder Pw dispersed in the bag filter 34 adheres to the filter cloth 36, and adsorbs the heavy oil component in the exhaust gas G flowing thereafter together with the light oil component. The harmless gas Gn in the exhaust gas G from which the oil has been removed is discharged from the exhaust device 38 to the outside through the filter cloth 36.
[0064]
The powder Pw in which the heavy oil component is adsorbed together with the light oil component is dropped off from the filter cloth 36 by vibration or impact, and is collected together with dust.
[0065]
In this way, the contaminated soil 3 is recovered as harmless purified soil 7, and the heavy oil component is discharged as harmless gas Gn. The solids 5 for ensuring the low-temperature heat treatment in the drying drum 20 are repeatedly recycled.
[0066]
The above illustrated embodiment is merely an example, and does not limit the technical scope of the present invention.
For example, in the first embodiment of FIG. 1, the solid 5 that removes heavy oil attached to the inner wall of the drying drum 20 is supplied from the outside of the drying drum 20 and discharged from the drying drum 20 to treat the contaminated soil. Although it is configured to circulate in the apparatus 1, if it is configured not to circulate the entire amount of the solid 5 for removing heavy oil but to remain in the drying drum 20 in a predetermined amount, the drying drum 20 It is possible to reduce the heating heat of the drying drum 20 by the amount of heat accumulated in the solid matter 5 remaining in the inside.
[0067]
【The invention's effect】
The functions and effects of the present invention are listed below.
(A) According to the present invention, since the solid is supplied to the drying drum, the solid is prevented from dropping or rotating in the drying drum and the heavy oil is prevented from sticking to the inner wall of the drum, and the heavy oil is solidified. It is possible to prevent the heat exchange failure between the contaminated soil and the dry gas due to the adhesion of the substance and to operate the drying drum normally.
(B) Since a solid material supply mechanism is provided to supply the solid material to the drying drum, the supply and replacement of the solid material is easy, and a large amount of new solid material is always supplied to prevent the solidified material from adhering to heavy oil. it can.
(C) If solid matter is mixed in the drying drum, it is possible to prevent heavy oil from adhering to and solidifying on the inner wall of the drying drum.
(D) Since the powder supply mechanism supplies the powder for contaminant adsorption to the filter means for purifying the exhaust gas from the drying drum, the powder adsorbs the contaminants in the exhaust gas and emits harmless exhaust gas. Gas can be separated.
(E) Since the filter means includes a filter mainly composed of fibers, the powder for adsorbing the contaminants easily adheres to the fiber surface, and the contaminants can be efficiently adsorbed by the powders.
(F) Since the contaminant adheres to the powder on the fiber surface, the adhered substance can be easily removed from the filter by applying vibration or impact periodically or as needed.
[Brief description of the drawings]
FIG. 1 is a block diagram of a first embodiment of a contaminated soil treatment apparatus of the present invention.
FIG. 2 is a block diagram of a second embodiment of the contaminated soil treatment apparatus.
[Explanation of symbols]
G: Exhaust gas Pw Powder 1 First embodiment of contaminated soil treatment device 2 Second embodiment of contaminated soil treatment device 3 Contaminated soil 5 Solid matter 7 ... Purified soil 9 ... Carrier 10 ... Solids supply mechanism 11 ... First belt conveyor 12 ... Second belt conveyor 14 ... Hopper 16 ... Third belt Conveyor 20 Drying drum 26 Elevator 30 Powder supply mechanism 31 Powder input tank 32 Powder input pipe 33 Nozzle 34 Bag filter 36 ..Filter cloth
40 cooling drum 44 storage silo 48 fourth belt conveyor 50 vibrating sieve 52 fifth belt conveyor

Claims (4)

A contaminated soil treatment apparatus comprising: a drying drum that heat-treats contaminated soil; and a solid matter supply mechanism that supplies solid matter to the drying drum. A contaminated soil treatment apparatus comprising a drying drum for heat-treating contaminated soil, wherein the drum contains a solid substance for removing contaminant components. A drying drum for heating the contaminated soil, a filter means for purifying exhaust gas from the drying drum, and a powder supply mechanism for supplying the filter means with powder for adsorbing contaminants. Characterized contaminated soil treatment equipment. The filter means has a fiber-based filter, and the contaminant-adsorbing powder is located on the surface of the fiber without passing through the fiber of the filter, and has a property of adsorbing contaminants. 4. The contaminated soil treatment device according to claim 3, comprising:

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