CN104307863B - Serious pollution soil restoring device - Google Patents

Abstract

A heavily polluted soil remediation device, including a soil adding and discharging system, a soil heating and stirring system, and a volatile waste gas purification system; the soil adding and discharging system includes a soil discharge inclined bucket, a soil cylinder, and a soil adding port; the soil heating and stirring system includes Air intake pipe, air heating system, stirring motor, stirring drive shaft and stirring blades; volatile waste gas purification system consists of volatile waste gas oxidation absorption area, volatile waste gas alkalization absorption area, demister, volatile waste gas acidification absorption area, activated carbon from the bottom up Adsorption layer and exhaust fan; or volatile waste gas purification system, from bottom to top, consists of volatile waste gas oxidation absorption zone, volatile waste gas acidification absorption zone, mist eliminator, volatile waste gas alkalization absorption zone, activated carbon adsorption layer and exhaust fan.

Description

Severely polluted soil remediation device

technical field

The invention relates to the technical field of remediation and treatment of polluted soil, in particular to a heavily polluted soil remediation device.

Background technique

The production processes of modern petroleum exploration, mining, processing enterprises, as well as chemical and pharmaceutical enterprises often cause serious pollution to the soil. The volatile substances such as diesel oil, benzene, toluene, and carbon tetrachloride in these heavily polluted sites are very high, and Most of these pollutants are hydrophobic organic substances, which have low solubility in the water phase and can stay in the soil environment for a long time, which not only destroys the structure and function of the soil, but also has a serious impact on the physical and chemical properties of the soil. Long-term source of contamination of groundwater. At present, the treatment of heavily volatile polluted soil mostly adopts digging the soil away from the site for incineration, landfill, water flushing and other treatment, but there are problems such as high treatment cost and easy to produce secondary pollution.

Chinese patent "Volatile and semi-volatile organic compound polluted soil off-site treatment process and device" (patent number: 200410056888.7) discloses a volatile and semi-volatile organic compound polluted soil off-site treatment process and device, the device has a simple structure etc. advantages; but the patented device has the following defects: volatile and semi-volatile organic compounds are only adsorbed by activated carbon, and it is difficult to meet the emission standards of the atmosphere.

Contents of the invention

The technical problem to be solved by the present invention is: to overcome the technical problems of the above-mentioned patents, to provide a heavily polluted soil remediation device, which can effectively treat various volatile heavily polluted soils, has a simple structure, is easy to operate, and can perform soil restoration on the spot at the polluted site. Fix governance.

The technical solution adopted by the present invention to solve its technical problems is: a heavily polluted soil remediation device, including soil addition and discharge system, soil heating and stirring system, volatile waste gas purification system; soil addition and discharge system, soil heating and stirring system Located at the lower part of the entire heavily polluted soil remediation device, the volatile exhaust gas purification system is located at the middle and upper part of the entire heavily polluted soil remediation device.

The soil adding and discharging system includes a soil discharging inclined bucket, a soil cylinder and a soil adding port.

The soil discharge inclined bucket is located at the lowest part of the soil addition and discharge system, the upper part of the soil discharge inclined bucket is a conical structure, and the lower outlet is inclined to one side of the entire heavily polluted soil remediation device.

The lower part of the soil cylinder is connected to the upper opening of the soil discharge slope bucket, and the middle of the soil cylinder and the soil discharge slope bucket is separated by a drawable baffle. The soil adding port is located on the upper part of the soil cylinder and on the side opposite to the lower outlet of the soil discharge inclined bucket, and the soil adding port is provided with an arc-shaped sliding door that opens up and down.

The soil heating and stirring system includes an air intake pipe, an air heating system, a stirring motor, a stirring drive shaft and stirring blades. The air heating system is located on the upper part of the soil pumpable baffle, adopts an electric heating device, and is fixed on the inner wall of the soil cylinder by a cross bracket. The stirring drive shaft and the stirring blade are hollow structures, and the stirring blade is provided with a hot air outlet.

The volatile waste gas purification system consists of volatile waste gas oxidation absorption area, volatile waste gas alkalization absorption area, mist eliminator, volatile waste gas acidification absorption area, activated carbon adsorption layer and exhaust fan or the volatile waste gas purification system from the bottom up. From the bottom up, there are volatile waste gas oxidation absorption area, volatile waste gas acidification absorption area, mist eliminator, volatile waste gas alkalization absorption area, and activated carbon adsorption layer.

The volatile waste gas oxidation absorption zone is located on the upper part of the soil cylinder; the volatile waste gas oxidation absorption component is arranged in the volatile waste gas oxidation absorption zone, and the volatile waste gas oxidation absorption component includes ozone oxidized water located on the upper part of the volatile waste gas oxidation component. The spray device, the ozone oxidation water storage tank located at the lower part of the volatile waste gas oxidation absorption assembly, and the ozone aeration pan placed in the ozone oxidation water storage tank, the ozone aeration pan communicates with the ozone generator through the aeration tube, and also has Pump the ozonated water in the ozonated water storage tank into the ozonated water circulating pump of the ozonated water spraying device.

The volatile waste gas alkalization absorption area is provided with a volatile waste gas alkalization absorption component, and the volatile waste gas alkalization absorption component includes an alkaline solution spray device located on the upper part of the volatile waste gas alkalization component, and a volatile waste gas alkalinity absorption component located An alkaline solution water storage tank at the lower part and an alkaline solution circulation pump for pumping the alkaline solution in the alkaline solution water storage tank into the alkaline solution spraying device.

The volatile waste gas acidification absorption area is provided with a volatile waste gas acidification absorption component, and the volatile waste gas acidification absorption component includes an acid solution spray device located on the upper part of the volatile waste gas oxidation component, and an acid solution water storage tank located at the lower part of the volatile waste gas acidification absorption component and an acid solution circulation pump for pumping the acid solution in the acid solution storage tank into the acid solution spraying device.

A demister is arranged between the volatile waste gas alkalization absorption component and the volatile waste gas acidification absorption component. The demister collects large liquid droplets in the gas and returns them to reduce the moisture in the gas. The working principle is that the gas enters the demister, passes through a series of bends, and is discharged from the top, while the water droplets, due to their mass and kinetic energy, fall straight down when passing through the bends, collide with the surface of the demister, and fall under the force of gravity. Rebound under action.

The upper part of the volatile waste gas acidification absorption component is provided with an activated carbon adsorption layer, and activated carbon is arranged in the activated carbon adsorption layer. The activated carbon is required to have the advantages of developed pores, large specific surface area, fast adsorption speed, anti-friction, and washing resistance. After running for a long time, it is found that the activated carbon becomes sticky, and the activated carbon needs to be replaced in time when the gas velocity decreases.

Specifically, the middle of the heavily polluted soil remediation device is cylindrical, and the upper and lower ends are conical tanks. The tank is provided with an observation port and a maintenance and replacement port. The volume of the tank can be determined according to the amount of soil to be treated. It depends on how much it is, and it is placed vertically.

In order to facilitate the discharge of the treated clean gas, an exhaust fan is installed at the uppermost conical tank of the heavily polluted soil remediation device.

Further matching with the cylindrical tank container, the ozonated water storage tank, alkaline solution storage tank and acid solution storage tank are in the shape of a round basin, and the ozonized water storage tank, alkaline solution storage tank and acid solution storage tank A spray water gathering device is arranged above the water tank, and the diameter of the lower end of the spray water gathering device is smaller than the diameters of the ozone oxidation water storage tank, the alkaline solution storage tank and the acid solution storage tank. The spray water gathering device can make the spray water gather and flow back to the ozone oxidation water storage tank, the alkaline solution storage tank and the acidic solution storage tank.

Further, in order to replenish the absorption solution in time, the volatile waste gas alkalization absorption assembly is also equipped with an alkali addition device, and the alkali addition device includes a lye tank and a stirring device, and the lye tank is connected to the alkaline Solution circulation pump; the volatile exhaust gas acidification component is also equipped with an acid adding device, the acid adding device includes an acid tank and a stirring device, and the acid tank is connected to the acid solution circulation pump through pipelines and valves. The proportioning concentration of the absorption solution is determined according to the amount of volatile waste gas to be treated and the concentration of volatile waste gas.

Further, the ozonated water spraying device, the alkaline solution spraying device and the acidic solution spraying device are spiral spraying devices; the sprayed water is in the form of mist, and the water mist intersects and merges without leaving The dead angle is beneficial to expand the contact area between the volatile waste gas and the solution, and improve the absorption rate and absorption effect.

The alkaline solution used in the volatile waste gas alkalization absorption component is sodium hydroxide solution or lime water, and the acidic solution used in the volatile waste gas acidification absorption component is sulfuric acid or hydrochloric acid.

As a further preferred device, the ozone generator is an intermediate frequency ozone generator, which consumes less power, occupies a small area, and can realize automatic control.

As a further preferred device, the mist eliminator is a baffle plate mist eliminator or a swirl plate mist eliminator.

Further preferred equipment, the bottom of the entire device is provided with three legs.

Further, in order to save space and be attractive in appearance, described ozone generator, ozonated water circulating pump, alkaline solution circulating pump and acidic solution circulating pump are arranged between the three legs at the bottom, and the tank of the integrated device A groove is arranged on the body, and a connecting pipe is arranged in the groove, and the connecting pipe connects the water storage tank, the spraying device and the circulating pump.

The beneficial effect of the present invention is that, firstly, the soil adding port is opened, and the polluted soil is put into the soil cylinder, and the air heating system heats the fresh air from outside the system, and under the pumping effect of the exhaust fan, the hot air is discharged from the hollow The stirring drive shaft, the stirring blades and the hot air outlet on the stirring blades enter the soil, and the soil will bring out volatile substances under the action of heating and stirring, and the volatile waste gas will rise to the oxidation absorption zone, and the ozone oxidized water will flow from the evenly distributed ozone oxidized water Sprayed by the spraying device, countless fine mist droplets are formed, which will undergo a chemical reaction after being fully mixed with the volatile waste gas. The exhaust gas continues to rise and contacts the alkaline solution sprayed by the alkaline solution spraying device. The acidic substances in the volatilized exhaust gas react chemically with the alkaline substances, and the reaction products flow into the lower alkaline solution storage tank with the alkaline solution, and then enter the removal The liquid droplets in the volatile exhaust gas are intercepted here; the volatile exhaust gas continues to rise and contacts the acidic solution sprayed by the acid solution spray device, and the alkaline substances in the volatile exhaust gas react with the acid, and the reaction products react with the acidic solution. The solution flows into the lower acidic solution storage tank, and then enters the activated carbon adsorption layer, where the substances and liquid droplets contained in the volatile waste gas are intercepted and adsorbed, and the volatile waste gas is processed into clean gas to achieve standard discharge; The extraction baffle between the soil cylinder and the soil discharge slant bucket, the soil is discharged from the soil discharge slant bucket, and backfilled in place; the heavily polluted soil remediation device of the present invention is simple in structure, easy to manufacture, and can effectively remediate various heavily polluted soils.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the structural representation of embodiment 1 of the present invention;

In the figure: 1. Soil discharge inclined bucket, 2. Soil cylinder, 3. Soil adding port, 4. Withdrawable baffle, 5. Air intake pipe, 6. Air heating system, 7. Stirring motor, 8. Stirring drive shaft , 9. Stirring blade, 10. Ozone oxidation water spray device, 11. Ozone oxidation water storage tank, 12. Ozone aeration plate, 13. Ozone generator, 14. Ozone oxidation water circulation pump, 15. Alkaline solution spray Device, 16. Alkaline solution water storage tank, 17. Alkaline solution circulating pump, 18. Acidic solution spraying device, 19. Acidic solution water storage tank, 20. Acidic solution circulating pump, 21. Demister, 22. Activated carbon adsorption layer, 23. exhaust fan, 24. spray water gathering device, 25. outrigger.

detailed description

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

Example 1

A heavily polluted soil remediation device of the present invention as shown in Figure 1 includes soil addition and discharge system, soil heating and stirring system, volatile waste gas purification system; soil addition and discharge system, soil heating and stirring system are located in the entire heavily polluted In the lower part of the soil remediation device, the volatile exhaust gas purification system is located in the middle and upper part of the entire heavily polluted soil remediation device.

The soil adding and discharging system comprises a soil discharging inclined bucket 1, a soil cylinder 2, and a soil adding port 3.

The soil discharge inclined bucket 1 is located at the lowest part of the soil addition and discharge system, the upper part of the soil discharge inclined bucket 1 is a conical structure, and the lower outlet is inclined to one side of the whole heavily polluted soil remediation device.

The lower part of the soil cylinder 2 is connected to the upper opening of the soil discharge slope 1, and the middle of the soil cylinder 2 and the soil discharge slope 1 is separated by a drawable baffle 4; the soil addition port 3 is located at the top of the soil cylinder 2, On the opposite side of the lower outlet of the soil discharge inclined bucket 1, the soil addition port 3 is provided with an arc-shaped sliding door that opens up and down.

The soil heating and stirring system includes an air intake pipe 5, an air heating system 6, a stirring motor 7, a stirring drive shaft 8 and a stirring blade 9; The device is fixed on the inner wall of the soil cylinder 2 by a cross bracket; the stirring motor 7 is located on the top of the soil cylinder 2, and is fixed on the inner wall of the soil cylinder 2 by a cross bracket, and the stirring drive shaft 8 and the stirring blade 9 are hollow structure, the stirring blade 9 is provided with a hot air outlet.

The volatile waste gas purification system consists of volatile waste gas oxidation absorption area, volatile waste gas alkalization absorption area, mist eliminator, volatile waste gas acidification absorption area, and activated carbon adsorption layer from bottom to top.

The volatile waste gas oxidation absorption zone is located on the upper part of the soil cylinder 2; the volatile waste gas oxidation absorption component is arranged in the volatile waste gas oxidation absorption zone, and the volatile waste gas oxidation absorption component includes an ozone oxidation component located on the upper part of the volatile waste gas oxidation component. The water spray device 10, the ozone oxidation water storage tank 11 located at the lower part of the volatile waste gas oxidation absorption assembly and the ozone aeration pan 12 placed in the ozone oxidation water storage tank, the ozone aeration pan is connected to the ozone generator through the aeration tube Device 13 also has the ozone oxidation water circulation pump 14 that pumps the ozone oxidation water in the ozone oxidation water storage tank into the ozone oxidation water spraying device.

The volatile waste gas alkalization absorption area is provided with a volatile waste gas alkalization absorption component, and the volatile waste gas alkalization absorption component includes an alkaline solution spray device 15 located on the upper part of the volatile waste gas alkalization component, and a volatile waste gas alkalization absorption unit located The alkaline solution water storage tank 16 at the lower part of the assembly and the alkaline solution circulation pump 17 that pumps the alkaline solution in the alkaline solution water storage tank into the alkaline solution spraying device.

The volatile waste gas acidification absorption area is provided with a volatile waste gas acidification absorption assembly, and the volatile waste gas acidification absorption assembly includes an acid solution spray device 18 located on the upper part of the volatile waste gas oxidation assembly, and an acid solution storage device located at the lower part of the volatile waste gas acidification absorption assembly. Water tank 19 and the acidic solution circulating pump 20 that pumps the acidic solution in the acidic solution storage tank into the acidic solution spraying device.

A demister 21 is provided between the volatile waste gas alkalization absorption component and the volatile waste gas acidification absorption component. The demister 21 collects large liquid droplets in the gas and returns them to reduce the moisture content in the gas , its working principle is that the gas enters the demister, passes through a series of bends, and is discharged from the top, while the water droplets, due to their mass and kinetic energy, fall straight down when passing through the bend, collide with the surface of the demister, and rebound under the force of gravity.

The upper part of the volatile waste gas acidification absorption component is provided with an activated carbon adsorption layer 22, and activated carbon is arranged in the activated carbon adsorption layer 22. The activated carbon is required to have the advantages of developed pores, large specific surface area, fast adsorption speed, anti-friction, and wash resistance, such as After a long period of operation, it is found that the activated carbon becomes sticky, and the activated carbon needs to be replaced in time when the gas velocity decreases.

Specifically, the middle of the heavily polluted soil remediation device is cylindrical, and the upper and lower ends are conical tanks. The tank is provided with an observation port and a maintenance and replacement port. The volume of the tank can be determined according to the amount of soil to be treated. It depends on how much it is, and it is placed vertically.

In order to facilitate the discharge of the treated clean gas, an exhaust fan 23 is installed at the uppermost conical tank of the heavily polluted soil remediation device.

Further matching with the cylindrical tank container, the ozonated water storage tank 11, the alkaline solution storage tank 16 and the acidic solution storage tank 19 are in the shape of a round basin, and the ozone oxidation water storage tank 11 and the alkaline solution storage tank 16 and acidic solution water storage tank 19 tops are all provided with spray water gathering device 24, and the lower end diameter of described spray water gathering device 24 is less than ozone oxidation water storage tank 11, alkaline solution water storage tank 16 and acidic solution water storage tank 19 diameter; the spray water gathering device 24 can make the spray water gather and return to the ozonized water storage tank 11, the alkaline solution storage tank 16 and the acidic solution storage tank 19.

Further, in order to replenish the absorption solution in time, the volatile waste gas alkalization absorption assembly is also equipped with an alkali addition device, and the alkali addition device includes a lye tank and a stirring device, and the lye tank is connected to the alkaline Solution circulation pump 17; the volatile exhaust gas acidification component is also equipped with an acid adding device, the acid adding device includes an acid tank and a stirring device, and the acid tank is connected to the acid solution circulation pump 20 through pipelines and valves; the ratio of the absorption solution The concentration is determined according to the amount of volatile waste gas to be treated and the concentration of volatile waste gas.

Further, the ozone-oxidized water spraying device 10, the alkaline solution spraying device 15 and the acidic solution spraying device 18 are spiral spraying devices; the sprayed water is in the form of mist, and the water mist is cross-fused , without leaving any dead angle, it is beneficial to expand the contact area between the volatile waste gas and the solution, and improve the absorption rate and absorption effect.

Specifically, the alkaline solution used in the volatile waste gas alkalization absorption component is sodium hydroxide solution or lime water, and the acidic solution used in the volatile waste gas acidification absorption component is sulfuric acid or hydrochloric acid.

Further preferred equipment, described ozone generator 13 adopts intermediate frequency ozone generator, consumes less power, occupies a small area, and can realize automatic control.

As a further preferred device, the demister 21 is a baffle plate demister or a swirl plate demister.

As a further preferred device, three legs 25 are provided at the bottom of the entire device.

Further, for saving space and attractive in appearance, described ozone generator 13, ozonated water circulation pump 14, alkaline solution circulation pump 17 and acid solution circulation pump 20 are arranged between the three legs 25 at the bottom, and described The tank body of the integrated device is provided with a groove, and a connecting pipe is arranged in the groove, and the connecting pipe connects the water storage tank, the spraying device and the circulating pump.

First open the soil adding port 3, put the polluted soil into the soil cylinder 2, the air heating system heats the fresh air from outside the system, and the hot air is heated by the hollow stirring drive shaft 8, the stirring blade 9 and the heat on the stirring blade 9. The air outlet enters the soil, and the volatile substances are brought out under the action of the exhaust fan 23, and the volatile waste gas rises into the oxidation absorption area, and the ozonated water is sprayed from the evenly distributed ozonated water spraying device 10, forming countless fine particles. Fog droplets, after being fully mixed with volatile waste gas, a chemical reaction occurs. Harmful substances in volatile waste gas are oxidized into small molecular substances that are easy to absorb and absorb, and part of them are absorbed in ozonated water; volatile waste gas continues to rise and spray with alkaline solution The alkaline solution ejected from the device 15 contacts, and the acidic substances in the volatilized waste gas react chemically with the alkaline substances, and the reaction product flows into the lower alkaline solution water storage tank 16 along with the alkaline solution, and then enters the demister 21, and is released into the volatilized waste gas. The droplets are intercepted here; the volatile waste gas continues to rise and contacts the acidic solution sprayed by the acid solution spraying device 18, the alkaline substances in the volatile waste gas react with the acid, and the reaction product flows into the lower acidic solution with the acidic solution. In the water storage tank 19, it enters the activated carbon adsorption layer 22, where the pollutants and liquid droplets contained in the volatile waste gas are intercepted and adsorbed, and the volatile waste gas is processed into clean gas to achieve standard discharge; after the restoration is completed, the soil cylinder is drawn out 2 and the removable baffle plate 4 in the middle of the soil discharge inclined bucket 1, the soil is discharged by the soil discharge inclined bucket 1, and backfilled to the original position.

Example 2

The difference between the second embodiment of the present invention and the first embodiment is that the volatile substances in the soil are slightly alkaline, and there is no volatile waste gas alkalization absorption area in the heavily polluted soil remediation device, and the heavily polluted soil remediation device includes Soil addition and discharge system, soil heating and stirring system, volatile waste gas oxidation absorption area, volatile waste gas acidification absorption area, mist eliminator 21, activated carbon adsorption layer 22 and exhaust fan 23.

Example 3

The difference between the third embodiment of the present invention and the first embodiment is that the volatile substances in the soil are slightly acidic, there is no volatile waste gas acidification absorption area in the heavily polluted soil remediation device, and the heavily polluted soil remediation device includes soil addition And discharge system, soil heating and stirring system, volatile waste gas oxidation absorption area, volatile waste gas alkalization absorption area, mist eliminator 21, activated carbon adsorption layer 22 and exhaust fan 23.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (2)

1. A heavily polluted soil remediation device, characterized in that: the device includes soil addition and discharge system, soil heating and stirring system, volatile waste gas purification system; soil addition and discharge system, soil heating and stirring system are located in the entire heavily polluted The lower part of the soil remediation device, the volatile exhaust gas purification system is located in the middle and upper part of the entire heavily polluted soil remediation device; The soil adding and discharging system comprises a soil discharging inclined bucket (1), a soil cylinder (2), and a soil adding port (3); The soil discharge inclined bucket (1) is located at the lowest part of the soil addition and discharge system, the upper part of the soil discharge inclined bucket (1) is a conical structure, and the lower outlet is inclined to one side of the entire heavily polluted soil restoration device; The lower part of the soil cylinder (2) is connected to the upper opening of the soil discharge slope (1), and the soil cylinder (2) is separated from the soil discharge slope (1) by a drawable baffle (4); the soil The adding port (3) is located on the upper part of the soil cylinder (2), on the side opposite to the outlet of the soil discharge inclined bucket (1), and the soil adding port (3) is provided with an arc-shaped sliding door that opens up and down; Described soil heating and stirring system comprise air intake pipe (5), air heating system (6), stirring motor (7), stirring transmission shaft (8) and stirring blade (9); Described air heating system (6) is positioned at The upper part of the extraction baffle (4) adopts an electric heating device, and is fixed on the inner wall of the soil cylinder (2) by a cross bracket; the stirring motor (7) is located on the top of the soil cylinder (2), and is fixed on the On the inner wall of the soil cylinder (2), the stirring drive shaft (8) and the stirring blade (9) are hollow structures, and the stirring blade (9) is provided with a hot air outlet; The volatile waste gas purification system consists of volatile waste gas oxidation absorption area, volatile waste gas alkalization absorption area, mist eliminator, volatile waste gas acidification absorption area, activated carbon adsorption layer and exhaust fan from bottom to top; The volatile waste gas oxidation absorption zone is located on the upper part of the soil cylinder (2); the volatile waste gas oxidation absorption component is arranged in the volatile waste gas oxidation absorption zone, and the volatile waste gas oxidation absorption component includes a Ozone oxidation water spraying device (10), the ozone oxidation water storage tank (11) that is positioned at the lower part of volatile exhaust gas oxidation absorption assembly and the ozone aeration disc (12) that is placed in the ozone oxidation water storage tank, described ozone aeration The disc communicates with the ozone generator (13) through the aeration pipe, and also has the ozone oxidation water circulation pump (14) that pumps the ozone oxidation water in the ozone oxidation water storage tank into the ozone oxidation water spraying device; The volatile waste gas alkalization absorption area is provided with a volatile waste gas alkalization absorption assembly, and the volatile waste gas alkalization absorption assembly includes an alkaline solution spraying device (15) located on the upper part of the volatile waste gas alkalization assembly, a volatile waste gas alkali The alkaline solution water storage tank (16) at the lower part of the chemical absorption assembly and the alkaline solution circulation pump (17) that pumps the alkaline solution in the alkaline solution water storage tank into the alkaline solution spraying device; The volatile waste gas acidification absorption area is provided with a volatile waste gas acidification absorption assembly, and the volatile waste gas acidification absorption assembly includes an acid solution spray device (18) located on the upper part of the volatile waste gas oxidation assembly, and an acid solution spray device (18) located at the lower part of the volatile waste gas acidification absorption assembly. A solution water storage tank (19) and an acidic solution circulation pump (20) that pumps the acidic solution in the acidic solution water storage tank into the acidic solution spraying device; There is a demister (21); an activated carbon adsorption layer (22) is arranged on the upper part of the volatile waste gas acidification absorption component, and activated carbon is arranged in the activated carbon adsorption layer (22); The middle of the heavily polluted soil remediation device is cylindrical, and the upper and lower ends are conical tanks, which are placed vertically; the uppermost conical tank of the heavily polluted soil remediation device is equipped with an exhaust fan (23); described ozonated water storage tank (11), alkaline solution storage tank (16) and acidic solution storage tank (19) are round basin shape, and ozone oxidation water storage tank (11), alkaline solution storage tank Water tank (16) and acidic solution water storage tank (19) tops are all provided with spray water gathering device (24), and the lower end diameter of described spray water gathering device (24) is less than ozone oxidation water storage tank (11), alkali The diameter of the water storage tank (16) and acidic solution storage tank (19); the spray water gathering device (24) can make the spray water gather and flow back to the ozonized water storage tank (11), the alkaline solution storage tank (16 ) and acidic solution water storage tank (19); The volatile waste gas alkalization absorption assembly is also equipped with an alkali-adding device, and the described alkali-adding device includes a lye tank and a stirring device, and the lye tank is connected to the alkaline solution circulating pump (17) through a pipeline and a valve; the volatile waste gas The acidification component is also equipped with an acid adding device, which includes an acid tank and a stirring device, and the acid tank is connected to the acid solution circulation pump (20) through a pipeline and a valve; the bottom of the whole set of devices is provided with three legs (25). 2. The heavily polluted soil remediation device according to claim 1, characterized in that: the ozone generator (13), the ozonated water circulation pump (14), the alkaline solution circulation pump (17) and the acid solution circulation pump (20) Arranged between the three legs (25) at the bottom, the tank body of the heavily polluted soil remediation device is provided with a groove, and a connecting pipe is arranged in the groove, and the connecting pipe connects the water storage tank, spray device and circulation pump.