KR20120064807A

KR20120064807A - Multi step type soil washing facility and method for removal of heavy metal from contaminated soil

Info

Publication number: KR20120064807A
Application number: KR1020100126011A
Authority: KR
Inventors: 송원근
Original assignee: 송원근
Priority date: 2010-12-10
Filing date: 2010-12-10
Publication date: 2012-06-20

Abstract

The present invention relates to a multi-stage soil washing apparatus and method for removing heavy metals from contaminated soil. For this purpose, a screening device, a primary washing tank, an acid supply tank, an acid recovery tank, a secondary washing tank, a primary sedimentation tank, a secondary sedimentation tank, The primary sedimentation tank, the secondary sedimentation tank, the concentration tank, and the dehydration apparatus are used to purify the heavy metal contaminated soil by wet washing. The sorting screen device is one of hopper vibration free screen, hopper vibration screen, inclined vibration free screen, and inclined vibration screen. The primary washing tank consists of the primary oil park passage and the primary spray device, and the secondary washing tank is the secondary oil park passage and the secondary spray. It consists of at least one injection device of the device, the tertiary injection device, the primary and secondary settling tanks are storage tanks having a settling function, the primary and second settling tanks are storage tanks having a settling function, and the concentration tank concentrates sludge. The dehydration device is characterized in that one of the electric dehydration mechanism, physical dehydration mechanism, chemical dehydration mechanism, thermal dehydration mechanism, other dehydration mechanism.

Description

Multi step type soil washing facility and method for removal of heavy metal from contaminated soil}

The present invention relates to a multi-stage soil washing apparatus and method for removing heavy metals from contaminated soil using a washing technique.

Acceleration of chemicals such as chemicals, oils, pesticides, etc., with the ever-increasing amount of wastes and usage of cities, industries, dredging, mines, nuclears, etc., which are concomitantly generated by the acceleration of industrial development and population growth worldwide. Soil pollution is intensifying due to handling and disposal.

In general, areas near factory areas, metal mines, and transportation industrial zones contain unusually high concentrations of heavy metals. In various industrial complexes, many chemicals are used to manufacture products and operate factories. Ammunition, chemicals, insecticides, etc., are widely used in agricultural areas and military bases. In addition, harmful substances such as metals and heavy metals are generated in metal mines.

In particular, these areas are contaminated with various types of heavy metals such as Pb, Cd, Hg, As and other heavy metals. With the recent increase in the amount of heavy metals entering the livelihood, the chances of encountering this have increased, and interest in its treatment is heightening.

Heavy metals contained in such chemicals are generated in large quantities so that the amount cannot be measured. If such heavy metal is leaked to the outside, water quality, soil, etc. will be contaminated. Soil pollution in this way adversely affects human and natural ecosystems in environmental aspects.

Therefore, efforts and researches to clean up heavy metal contaminated soil have been conducted. Soil washing is one of the methods to clean heavy metal contaminated soils. However, there is a problem that the cleaning efficiency is not large when the cleaning technique is applied to the soil contaminated with heavy metals.

Therefore, the present invention is to devise a multi-stage soil washing apparatus and method using an acid, a neutralizer, and a chemical to purify heavy metal contaminated soil.

The present invention is made to solve the problems of the prior art as described above, screening screen device, primary washing tank, acid supply tank, acid recovery tank, secondary washing tank, primary sedimentation tank, secondary sedimentation tank, primary sedimentation tank To clean up heavy metal contaminated soils by wet scrubbing using secondary sedimentation tanks, thickening tanks and dehydration equipment.

The present invention is to achieve the above object screening device, primary washing tank, acid supply tank, acid recovery tank, secondary washing tank, primary sedimentation tank, secondary sedimentation tank, primary sedimentation tank, secondary sedimentation tank, thickening tank, dehydration The device is used to clean heavy metal contaminated soils by wet cleaning. The sorting screen device is one of hopper vibration free screen, hopper vibration screen, inclined vibration free screen, and inclined vibration screen. The primary washing tank consists of the primary oil park passage and the primary spray device, and the secondary washing tank is the secondary oil park passage and the secondary spray. It consists of at least one injection device of the device, the tertiary injection device, the primary and secondary settling tanks are storage tanks having a settling function, the primary and second settling tanks are storage tanks having a settling function, and the concentration tank concentrates sludge. The dehydration device is characterized in that one of the electric dehydration mechanism, physical dehydration mechanism, chemical dehydration mechanism, thermal dehydration mechanism, other dehydration mechanism.

In the present invention, the screening device, the primary washing tank, the acid supply tank, the acid recovery tank, the secondary washing tank, the primary sedimentation tank, the secondary sedimentation tank, the primary sedimentation tank, the secondary sedimentation tank, the concentration tank, dehydration device using a wet washing method The contaminated soil is selected by the purification of heavy metal contaminated soil, and the selected contaminated soil is purified through the multi-stage washing of the first and second washing. As a multi-stage cleaning agent, it is possible to use acid, neutralizing agent and chemicals properly to provide efficient treatment result. In particular, the sorting screen device includes an hopper vibration free screen, a hopper vibration screen, an inclined vibration free screen, and an inclined vibration screen to provide efficient screening. The sludge dewatering device includes an electric dehydration device, a physical dehydration device, a chemical dehydration device, a thermal dehydration device, and other dehydration devices to provide effective dewatering.

1 is a schematic diagram showing the overall process of the heavy metal contaminated soil purification method using the soil washing method according to the present invention.
Figure 2 is a schematic diagram showing a partial process of the oil purification method of soil contaminated using the soil washing method according to the present invention
Figure 3 is a schematic diagram showing a sorting screen device according to the present invention
Figure 4 is a schematic diagram showing the primary oil park and the secondary oil park barrel according to the present invention.
5 is a schematic view showing the type of injection according to the present invention.

The present invention relates to a multi-stage soil washing apparatus and method for removing heavy metals from contaminated soil. For this purpose, a screening screen (20), a primary washing tank (30), an acid supply tank (31), an acid recovery tank (32), Wet washing using the second washing tank 33, the first settling tank 40, the second settling tank 41, the first settling tank 42, the second settling tank 43, the concentration tank 44, and the dehydrating device 45 This is to clean up heavy metal contaminated soil. The sorting screen device is one of hopper vibration free screen, hopper vibration screen, inclined vibration free screen, and inclined vibration screen. The primary washing tank consists of the primary oil park passage and the primary spray device, and the secondary washing tank is the secondary oil park passage and the secondary spray. It consists of at least one injection device of the device, the tertiary injection device, the primary and secondary settling tanks are storage tanks having a settling function, the primary and second settling tanks are storage tanks having a settling function, and the concentration tank concentrates sludge. The dehydration device is characterized in that one of the electric dehydration mechanism, physical dehydration mechanism, chemical dehydration mechanism, thermal dehydration mechanism, other dehydration mechanism.

In the present invention, first, the contaminated soil (1) contaminated with heavy metals is brought into the loading site, and the imported contaminated soil is introduced into the sorting screen device, and the introduced contaminated soil is the aggregate abnormalities (2) and other substances (in the sorting screen device). 3) is screened. The sorting screen device 20 is one of the hopper vibration free screen 200, the hopper vibration screen 201, the inclination vibration free screen 202, the inclined vibration screen 203, the hopper vibration free screen is a hopper having a vibration free screen attached to the inlet The hopper vibration screen is a hopper having a vibration screen attached to the inlet, the inclined vibration free screen is an inclined vibration free screen, and the inclined vibration screen is an inclined vibration screen. The vibration free screen is a screen which is not subjected to vibration, and the vibration screen is a screen to which vibration is applied, and the vibration is applied by at least one of hitting, shaking, shaking, shaking, shaking, shaking, vibrating, and ultrasonic waves. Aggregate anomaly (2) is a material of an aggregate anomaly size, including aggregate having a certain size, the aggregate anomaly selected in the screening screen device is carried out to the outside (4). Others (3) exclude aggregate abnormalities from contaminated soil.

Others enter the primary wash tank. The primary washing tank 30 is composed of the primary oil park barrel 300 and the primary spraying device 301. The primary oil park barrel is a cylinder in which the inlet 36 and the outlet 37 are formed at both ends, and the screen hole 38 is formed in a predetermined section of the cylindrical outlet. The pickling water 302 passes through the screen hole. The primary oil park barrel rotates around the inlet and the outlet of both ends, and the primary blasting point is installed inside the primary oil park bucket and acid is deposited on the other water and sedimentary sand that have flowed into the primary oil park bucket. To spray. Other water and sedimentary sand are pickled while stirring with acid by the rotation of the primary oil park barrel and the acid injection of the primary spray device. At the first inlet of the primary park barrel, other water and sedimentary water flows in. At the first of the primary oil park barrel, other water and sedimentary water washed out with acid flows out. ) Is leaked. The acid 14 is supplied from the acid supply tank 31, and the acid supply tank is a tank for supplying acid to the primary injection device. The pickling water flows into the acid recovery tank 32, and the acid recovery tank is a tank for recovering the available acid from the introduced acid recovery water, and the acid equivalent to the acid recovery tank flows into the acid supply tank or into the primary injection device. Supplied.

Pickling other water and sedimentary sand (10) is introduced into the secondary washing tank. The secondary washing tank 33 is composed of at least one of the secondary oil park barrel 330, the secondary injection device 331, the third injection device 332, the injection device. The secondary oil park barrel has inlets and outlets at both ends and cylinders with screen holes at certain sections of the cylinder outlet, and one of the neutralizer wash water, the chemical wash water, and the neutralizer drug wash water passes through the screen hole. The secondary oil park can be rotated around the inlet and the outlet of both ends. The neutralizing agent 16 is supplied from the neutralizing agent supply tank 34, and the neutralizing agent supply tank is a tank which supplies a neutralizing agent to a secondary injection device. The medicine 17 is supplied from the chemical supply tank 35, and the chemical supply tank is a tank for supplying the chemical to the tertiary injection device. The secondary jet is installed inside the secondary oil park barrel and sprays neutralizer to other water and sedimentary sand that has flowed into the secondary oil park barrel. It is to spray chemicals into other water and sedimentation sand.

Other water and sedimentary sand are washed with agitation with one or more of the neutralizing agent and the chemicals by rotating the secondary oil park and spraying one or more of the neutralizer injection of the secondary injection device and the chemical injection of the third injection device. Pickling water and sedimentary water pickled into the second inlet of the secondary oil park 36, and the other water and sedimentary sand washed with one or more of the neutralizing agent, chemical outflow into the outlet 37 of the secondary oil park, 2 One of the neutralizing agent washing water, the chemical washing water, and the neutralizing agent chemical washing water flows out into the coolant park barrel screen hole 38. Secondary park canisters and other sediment from the exit of the outlet is taken out. Neutralizer washing water (333) is a neutralizing agent washing water to wash other water and sedimentary sand, drug washing water (334) is a chemical washing water to wash other water and sedimentary sand, neutralizer chemical wash water (335) to wash other water and sedimentary sand. Neutralizer and chemical wash water.

Primary and secondary parks are installed in one of the horizontal direction (3000, 3300), vertical direction (3001, 3301), inclined direction (3002, 3302), the horizontal direction is the primary park and secondary The center line of the inlet 36 and the outlet 37 of both ends of the oil park barrel forms a horizontal direction, and the vertical direction of the inlet and outlet of both ends of the primary oil park barrel and the secondary oil park cylinder forms a vertical direction. Is the center line of the inlet and the outlet of both ends of the primary and secondary oil park barrels inclined direction.

The injection in the primary, secondary, and tertiary injection devices may be one of nozzle injection, hole injection, sprinkler injection, and slot injection, and the nozzle injection 390 may be provided in at least one hole in a hole having a constant length. The nozzle 391 is sprayed by the nozzle 391, the hole hole 392 is sprayed by the hole hole 393 installed in at least one number in the hole pipe having a predetermined length, the sprinkler spray 394 is a constant length It is sprayed by a sprinkler 395 installed in one or more numbers in the hole pipe having a number, the slot injection 396 is to be injected by the slot 397 formed in the hole pipe having a certain length. The injection pressure in the primary injection device, secondary injection device and tertiary injection device is one of natural pressure, gravity pressure, low pressure, medium pressure and high pressure, and natural pressure is natural pressure without artificial pressure. gravity-pressure is the pressure of gravity, low-pressure is a pressure of less than 5kg / cm ^2, the intermediate pressure is 5?, and a pressure of 10kg / cm ² range, the high-pressure is a pressure higher than 10kg / cm ^2.

At least one of the neutralizing wash water, the chemical washing water, and the neutralizing drug wash water flows into the primary sedimentation tank, and one or more of the other substances 3, the neutralizing wash water, the chemical washing water, and the neutralizing chemical wash water that flows beyond the primary sedimentation tank flows into the secondary sedimentation tank. The first and second settling tanks 40 and 41 are storage tanks having a settling function. At least one of the neutralizing agent washing water, the chemical washing water, and the neutralizing drug washing water is sedimented in the primary and secondary sedimentation tanks, and the precipitated in the primary and secondary sedimentation tanks becomes the sedimentary sand (10), and the sedimentary sand is introduced into the primary washing tank. do. Drugs are drugs except for acid and neutralizing agent to promote or improve the dissolution of heavy metals from other substances.

The supernatant of the secondary sedimentation tank flows into the primary sedimentation tank 42 and the secondary sedimentation tank 43, and the primary and secondary sedimentation tanks are the storage tanks having the sedimentation function, and the superior water of the primary and secondary sedimentation tanks (50). Is introduced into the fresh water tank (52).

The sludge, which is the precipitate 11 of the primary and secondary sedimentation tanks, flows into the concentration tank 44, the concentration tank is a tank for concentrating the sludge, and the sludge concentrated in the concentration tank is dewatered in the dehydration apparatus. The sludge settled in the ash recovery tank is dewatered by the dehydration unit. The sludge 13 dewatered by the dewatering device is taken out to the outside. Dehydration water 51 generated in the dewatering process of the sludge concentrated in the concentration tank is introduced into the fresh water tank. The supernatant 50 and the dewatered water 51 introduced into the fresh water tank 52 become the fresh water 53 and are reused at the entrance or taken out to the outside. Dehydration (15) generated in the dehydration process of the sludge precipitated in the ash recovery tank is introduced into the ash recovery tank for acid reduction.

The dehydration device 45 includes an electric dehydration device 450, a physical dehydration device 451, a chemical dehydration device 452, a thermal dehydration device 453, other dehydration device 454, the electric dehydration device is an electroosmotic, Dehydration by one or more of electrophoresis, the physical dehydration mechanism 451 is a filter press 4510, belt filter press 4511, decanter 4512, screw decanter 4513, centrifuge 4514, vacuum One of the dehydrator (4515), the compressed dehydrator (4516), the drum dehydrator (4517) is dewatering, the chemical dehydration mechanism is a dehydration by adding chemicals, the thermal dehydration mechanism is dehydration by using heat or heating, etc. The dehydration mechanism is characterized in that the dehydration is performed by a mechanism other than the electric dehydration mechanism, physical dehydration mechanism, chemical dehydration mechanism, and thermal dehydration mechanism.

Hereinafter, with reference to the accompanying drawings will be described further.

1 is a schematic diagram showing the overall process of the heavy metal contaminated soil purification method using the soil washing method according to the present invention. This figure relates to a multi-stage soil washing apparatus and method for removing heavy metals from contaminated soil. For this purpose, a screening screen (20), a primary washing tank (30), an acid supply tank (31), and an ash recovery tank (32) Wet washing method using the secondary washing tank 33, the primary sedimentation tank 40, the secondary sedimentation tank 41, the primary sedimentation tank 42, the secondary sedimentation tank 43, the concentration tank 44, and the dehydration device 45 Shows a process to clean up heavy metal contaminated soil. In addition, the sorting screen device 20 is one of the hopper vibration free screen 200, the hopper vibration screen 201, the inclined vibration free screen 202, the inclined vibration screen 203, the primary oil park and the secondary oil park is horizontal Direction (3000, 3300), vertical direction (3001, 3301), inclined direction (3002, 3302) is installed in one of the directions, the dehydration device 45 is an electrical dehydration mechanism 450, physical dehydration mechanism 451, chemical There is a dehydration mechanism 452, a thermal dehydration mechanism 453, and other dehydration mechanism 454, the dehydration mechanism is to dehydrate by one or more of electroosmotic, electrophoresis, the physical dehydration mechanism 451 is a filter press (4510) ), Belt filter press (4511), decanter (4512), screw decanter (4513), centrifuge (4514), vacuum dehydrator (4515), dehydrator (4516), drum dehydrator (4517) Shows.

Figure 2 is a schematic diagram showing a partial process of the oil purification method of soil contaminated using the soil washing method according to the present invention. This figure relates to a multi-stage soil washing apparatus and method for removing heavy metals from contaminated soil. For this purpose, a screening screen (20), a primary washing tank (30), an acid supply tank (31), and an ash recovery tank (32) Wet washing method using the secondary washing tank 33, the primary sedimentation tank 40, the secondary sedimentation tank 41, the primary sedimentation tank 42, the secondary sedimentation tank 43, the concentration tank 44, and the dehydration device 45 Shows a process to clean up heavy metal contaminated soil.

Figure 3 is a schematic diagram showing a sorting screen device according to the present invention. The sorting screen device 20 is one of the hopper vibration free screen 200, the hopper vibration screen 201, the inclination vibration free screen 202, the inclined vibration screen 203, the hopper vibration free screen is a hopper having a vibration free screen attached to the inlet The hopper vibration screen is a hopper having a vibration screen attached to the inlet, the inclined vibration free screen is an inclined vibration free screen, and the inclined vibration screen is an inclined vibration screen. The vibration free screen is a screen which is not subjected to vibration, and the vibration screen is a screen to which vibration is applied, and the vibration is applied by at least one of hitting, shaking, shaking, shaking, shaking, shaking, vibrating, and ultrasonic waves.

Figure 4 is a schematic diagram showing the primary oil park and the secondary oil park barrel according to the present invention. Primary and secondary parks are installed in one of the horizontal direction (3000, 3300), vertical direction (3001, 3301), inclined direction (3002, 3302), the horizontal direction is the primary park and secondary The center line of the inlet 36 and the outlet 37 of both ends of the oil park barrel forms a horizontal direction, and the vertical direction of the inlet and outlet of both ends of the primary oil park barrel and the secondary oil park cylinder forms a vertical direction. Is the center line of the inlet and the outlet of both ends of the primary and secondary oil park barrels inclined direction.

It is a schematic diagram which shows the kind of injection by this invention. The injection in the primary, secondary, and tertiary injection devices may be one of nozzle injection, hole injection, sprinkler injection, and slot injection, and the nozzle injection 390 may be provided in at least one hole in a hole having a constant length. The nozzle 391 is sprayed by the nozzle 391, the hole hole 392 is sprayed by the hole hole 393 installed in at least one number in the hole pipe having a predetermined length, the sprinkler spray 394 is a constant length It is sprayed by a sprinkler 395 installed in one or more numbers in the hole pipe having a number, the slot injection 396 is to be injected by the slot 397 formed in the hole pipe having a certain length.

1: Polluted soil 2: Aggregate abnormalities
3: Others 4: External carry out
10: precipitated sand 11: precipitate
12: sludge before dehydration 13: sludge after dehydration
14 acid 15 dehydration
16: neutralizer 17: drug
20: sorting screen device 200: hopper vibration free screen
201: Hopper vibration screen 202: Slope vibration free screen
203: inclined copper screen 30: 1st washing tank
300: primary oil park barrel 3000: horizontal direction primary oil park bucket
3001: Primary oil park bucket installed vertically 3002: Primary oil park bucket installed vertically
301: primary injection device 302: pickling water
31: acid supply tank 32: acid recovery tank
33: 2nd washing tank 330: 2nd oil park barrel
3300: 2nd oil park bucket for horizontal installation 3301: 2nd oil park bucket for horizontal installation
3302: inclined direction secondary oil park barrel 331: secondary injector
332: third injection device 333: neutralized washing water
334: washing water 335: neutralizing drug washing
34: neutralizer supply tank 35: chemical supply tank
36: inlet 37: outlet
38: screen hole 390: nozzle spray
391: nozzle 392: hole hole injection
393: hole hole 394: sprinkler spray
395: sprinkler 396: slot injection
397: slot 40: first settler
41: secondary sedimentation tank 42: primary sedimentation tank
43: secondary sedimentation tank 44: concentration tank
45: dehydration device 450: electric dehydration device
451: physical dehydration mechanism 4510: filter press
4511: Belt filter press 4512: Decanter
4513: screw decanter 4514: centrifuge
4515: vacuum dehydrator 4516: compression dehydrator
4517 drum dehydrator 452 chemical dehydrator
453: heat dehydration apparatus 454: other dehydration apparatus
50: supernatant 51: dehydration
52: fresh water tank 53: fresh water

Claims

Heavy screen contaminated soil by wet washing method using sorting screen device, 1st washing tank, acid supply tank, 2nd recovery tank, 2nd washing tank, 1st settling tank, 2nd settling tank, 1st settling tank, 2nd settling tank, thickening tank, dehydration device By purifying
The screening screen device is one of hopper vibration free screen, hopper vibration screen, inclined vibration free screen, inclined vibration screen,
The primary washing tank consists of the primary oil park passage primary spray device,
The acid supply tank is a tank for supplying acid to the primary injection device,
The acid recovery tank is a tank for recovering the available acid from the pickling water introduced,
The secondary washing tank is composed of at least one injection device of the secondary oil park pass secondary injection device, tertiary injection device,
The first and second settling tanks are storage tanks having a settling function,
The first and second settling tank is a storage tank having a precipitation function,
The thickening tank is a tank for condensing sludge,
The dewatering device is a soil washing apparatus and method for removing heavy metals from contaminated soil, characterized in that the electrical dehydration device, physical dehydration device, chemical dehydration device, thermal dehydration device, other dehydration device.

Soil contaminated with heavy metals is brought in
The imported soil is put into the sorting screen device,
The screening screen device is one of hopper vibration free screen, hopper vibration screen, inclined vibration free screen, inclined vibration screen,
The hopper vibration free screen is a hopper having a vibration free screen attached to the inlet,
The hopper vibration screen is a hopper with a vibration screen attached to the inlet,
The inclined vibration free screen is an inclined vibration free screen,
The inclined copper screen is an inclined vibration screen,
The vibration free screen is a screen to which no vibration is applied,
The vibration screen is a screen to which vibration is applied,
The vibration is applied by one or more of blow, shake, shake, vibration, shaking, vibrating, ultrasound,
The introduced contaminated soil is sorted into aggregate abnormalities and other substances in the sorting screen device,
Aggregate abnormalities selected by the sorting screen device is carried out to the outside,
The aggregate abnormal material is a material of the aggregate abnormal size, including the aggregate having a certain size,
The other material is excluded from the aggregate soil abnormalities in contaminated soil
The other water is introduced into the first washing tank,
The primary washing tank consists of the primary oil park passage primary spray device,
The primary oil park cylinder is a cylinder in which both inlets and outlets at both ends and a screen hole is formed in a predetermined section of the cylinder outlet,
Pickling water is passed through the screen hole,
The primary oil park barrel rotates around the inlet and the outlet of both ends,
The first jet plant is installed inside the primary oil park barrel and sprays acid to other water and sedimentary sand introduced into the primary oil park barrel,
The other water and sedimentary sand are pickled while being stirred with acid by the rotation of the primary oil park barrel and the acid injection of the primary spray device,
Inlet of one end of the primary oil park barrel, the other water and sedimentary sand is introduced,
As the outlet of one end of the primary oil park barrel, the other water and sedimentary sand washed with acid flows out,
Pickling water flows out into the primary oil park screen hole,
The acid is supplied from an acid supply tank,
The acid supply tank is a tank for supplying acid to the primary injection device,
The pickling water flows into the ash recovery tank,
The acid recovery tank is a tank for recovering the available acid from the pickling water introduced,
Acid equivalent to the acid recovery tank is introduced into the acid supply tank or supplied to the primary injection device,
The pickling other water and sedimentary sand is introduced into the secondary washing tank,
The secondary washing tank is composed of at least one injection device of the secondary oil park pass secondary injection device, tertiary injection device,
The secondary oil park cylinder is a cylinder having screen inlet and outlet at both ends of the inlet and outlet, the cylinder outlet,
One of the neutralizer wash water, the chemical wash water, the neutralizer drug wash water passes through the screen hole,
The secondary oil park barrel rotates around the inlet and the outlet of both ends,
The neutralizing agent is supplied from a neutralizing agent supply tank,
The neutralizer supply tank is a tank for supplying a neutralizer to the secondary injection device,
The medicine is supplied from a medicine supply tank,
The chemical supply tank is a tank for supplying a chemical to the tertiary injection device,
The secondary jet plant is installed inside the secondary oil park barrel and sprays neutralizer to other water and sedimentary sand introduced into the secondary oil park barrel,
The third jet plant is installed inside the secondary oil park barrel and sprays chemicals to other water and sedimentary sand introduced into the secondary oil park barrel,
By rotating the secondary oil park barrel and spraying one or more of the neutralizer injection of the secondary injection device, the drug injection of the tertiary injection device, the other water and sedimentary sand is washed while stirring with one or more of the neutralizing agent, the drug,
As the inlet of the end of the second oil park barrel, pickling other water and sedimentary sand are introduced.
Outlet of the secondary oil park barrel one end of the neutralizer, other water washed with one or more of the drug and sedimentary sand is discharged,
One of the neutralizer washing water, the chemical washing water, the neutralizing chemical washing water flows out into the secondary oil park barrel screen hole,
Other sediment and sediment sand leaked from the outlet of one end of the secondary oil park barrel is taken out to the outside,
The neutralizing agent wash water is a neutralizing agent washing water to wash other water and precipitated sand,
The drug wash water is a drug wash water to wash other water and sedimentary sand,
The neutralizer drug wash water is a neutralizer and drug wash water to wash other water and sedimentation sand,
The primary oil park and the secondary oil park are installed in one of horizontal, vertical, and inclined directions.
The horizontal direction is the center line of the inlet and outlet of the both ends of the primary oil park and the secondary oil park, the horizontal direction,
The vertical direction is the center line of the inlet and the outlet of the both ends of the primary oil park and the secondary oil park, the vertical direction,
The inclined direction is the center line of the inlet and the outlet of the both ends of the primary oil park and the secondary oil park, the inclined direction,
The injection in the primary injection device, secondary injection device, and tertiary injection device may be one of nozzle injection, hole injection, sprinkler injection, and slot injection,
The nozzle spray is to be sprayed by a nozzle installed in at least one number in the hole pipe having a certain length,
The hole hole injection is to spray by a hole hole installed in one or more numbers in the hole pipe having a certain length,
The sprinkler injection is to be sprayed by a sprinkler installed in at least one number in the hole pipe having a certain length,
The slot injection is to be injected by the slot formed in the hole pipe having a certain length,
The injection pressure in the injection in the primary injection device, secondary injection device, tertiary injection device is one of natural pressure, gravity pressure, low pressure, medium pressure, high pressure,
The natural pressure is a natural pressure that is not artificially pressured,
The gravity pressure is the pressure of gravity,
The low pressure is less than 5 kg / cm ² ,
The medium pressure is a pressure in the range of 5 ~ 10kg / cm ² ,
The high pressure is higher than 10 kg / cm ² ,
At least one of the neutralizer wash water, drug wash water, neutralizer drug wash water flows into the primary sedimentation tank,
One or more of the other water 3, the neutralizing agent washing water, the chemical washing water, and the neutralizing agent washing water that flowed beyond the primary sedimentation tank flows into the secondary sedimentation tank,
The first and second settling tanks are storage tanks having a settling function,
At least one of the neutralizing agent washing water, the chemical washing water, and the neutralizing agent washing water is immersed in the primary and secondary immersion tanks,
The sedimentation in the first and second sedimentation tank is a sedimentary sand,
The settling sand is introduced into the first washing tank,
The drug is a drug for promoting or improving the dissolution of heavy metals from other substances as drugs except for acid, neutralizing agent,
The supernatant of the secondary sedimentation tank is introduced into the primary and secondary sedimentation tank,
The first and second settling tank is a storage tank having a precipitation function,
The supernatant of the first settling tank and the second settling tank is introduced into the fresh water tank,
The sludge which is a precipitate of the first settling tank and the second settling tank is introduced into the concentration tank,
The thickening tank is a tank for condensing sludge,
The sludge concentrated in the concentration tank is dewatered in a dehydration apparatus,
The sludge precipitated in the acid recovery tank is dewatered by a dehydration device,
The sludge dehydrated by the dehydration device is taken out to the outside,
Dehydration generated in the dewatering process of the sludge concentrated in the concentration tank is introduced into the fresh water tank,
The supernatant and dehydrated water introduced into the fresh water tank are fresh water and reused at the entrance or taken out to the outside,
Dehydration generated in the dehydration process of the sludge precipitated in the ash recovery tank is introduced into the ash recovery tank for redox,
The dehydration device is an electric dehydration device, physical dehydration device, chemical dehydration device, thermal dehydration device, other dehydration device,
The electric dehydration mechanism is to dehydrate by one or more of electroosmotic, electrophoresis,
The physical dehydration mechanism is to dehydrate one of the filter press, belt filter press, decanter, screw decanter, centrifuge, vacuum dehydrator, compression dehydrator, drum dehydrator,
The chemical dehydration mechanism is to dehydrate by adding a chemical,
The thermal dehydration mechanism is to dehydrate by using heat or heating,
Other dehydration apparatus is a soil washing apparatus and method for removing heavy metals from contaminated soil, characterized in that the dehydration of the electric dehydration apparatus, physical dehydration apparatus, chemical dehydration apparatus, thermal dehydration apparatus other than