CN105057335A - Contaminated soil remediation method - Google Patents
Contaminated soil remediation method Download PDFInfo
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- CN105057335A CN105057335A CN201510501936.7A CN201510501936A CN105057335A CN 105057335 A CN105057335 A CN 105057335A CN 201510501936 A CN201510501936 A CN 201510501936A CN 105057335 A CN105057335 A CN 105057335A
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Abstract
The invention relates to a contaminated soil remediation method and belongs to the field of environmental protection machinery. The contaminated soil remediation method depends on automatic remediation equipment which comprises a soil liquefaction device and soil remediation equipment, wherein the soil liquefaction device comprises a mixing pool, a water inlet pipe and a slurry pump; a viscosity sensor is arranged in the mixing pool, a solenoid valve is arranged on the water inlet pipe, and the slurry pump is connected with the mixing pool through a pipeline; and the soil remediation equipment comprises a housing of which the interior is divided into an upper part and a lower part by a partition, namely a tail gas treatment pool at the upper part and a reaction tank at the lower part respectively, and the tail gas treatment pool and the reaction tank are connected through a tail gas collecting pipe. The contaminated soil remediation method has the advantages of high automation degree, favorable treatment effect and the like.
Description
Technical field
The present invention relates to a kind of restorative procedure of contaminated soil, belong to field of environment protection.
Background technology
Nearly 20 years, China was along with industrialization, urbanization, the deepening constantly of the intensive process in rural area, and soil contamination problem grows with each passing day.Soil pollution situation go from bad to worse and characteristic that soil is non-renewable becomes a great problem that restriction China continues development, solve soil contamination problem become China realize sustainable development in the urgent need to.
The conventional processing method of current soil pollution is as follows:
1 chemical leaching method: eluent is injected in contaminated soil or deposit, the process of pollutant in wash-out and cleaning soil.This technology has flexible operation, and repairing effect is stablized, and the cycle is short, the advantage that efficiency is high, but this technology scope of application is limited, and cost is high and can cause secondary pollution.
2 bioanalysises: utilize microbiological deterioration to carry out dye reparation to soil dirt, be a kind of recovery technique common in life, the method treatment effect is good, disposal cost is low, can not cause secondary pollution, but repair speed comparatively slowly, reaching regulation and control level needs considerable time.
3 thermal desorptions: in heating soil, organic contamination component is to sufficiently high temperature, make it evaporate and the process be separated with soil media.Thermal desorption technology has the advantages such as pollutant process range is wide, equipment is removable, the rear soil of reparation is recycling, but the equal dependence on import of domestic current capital equipment, cause equipment investment cost high.
Application number is 201010215971.X, denomination of invention is a kind of patent of the low-temperature desorption restorative procedure for contaminated soil, by contaminated soil preparatory stage, low-temperature desorption processing stage, tail gas treatment stage three steps form, be respectively: after contaminated soil being transported to low-temperature desorption workshop, make the multiple strip Tu Duo of Zinc fractions by equipment; By soil turning device, intermittent turning is carried out to Tu Duo, the pollutant volatilization in soil is removed, and periodic detection is carried out to the soil after turning; Derived after volatilization with the gas of pollutant by centrifugal exhaust fan, after bag-type dust and three way activity charcoal adsorb, realize the clean discharge of tail gas.The method is longer for repair time, and owing to adopting nature volatilization, pollutant removal is incomplete, and treatment effect is undesirable.
Application number is 201210383050.3, denomination of invention is a kind of contaminated soil remediation system adopting recirculating and method, it discloses a kind of method and the thermal desorption device that adopt thermal desorption method process contaminated soil, although solve the technical problem of equipment not dependence on import from function, but device overall structure is more complicated, after long-play, efficiency reduces very fast, treatment effect is undesirable, and automation degree of equipment is low.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of thermal desorption restorative procedure of organic soil pollution, utilize high temperature and high pressure gas that the volatile type organic in soil is overflowed, then this type of air is processed by vent gas treatment pond.
To achieve these goals, the present invention is by the following technical solutions:
A restorative procedure for contaminated soil, relies on automatic prosthetic appliance, and automatic prosthetic appliance comprises soil liquefaction device and soil remediation equipment;
Soil liquefaction device comprises mixing pit, water inlet pipe and slush pump; Be provided with viscosity sensor in mixing pit, water inlet pipe is provided with magnetic valve, and slush pump is connected with mixing pit by pipeline;
Described soil remediation equipment comprises a shell, and enclosure is become upper and lower two parts by a baffle for separating, and be positioned at the vent gas treatment pond of its upper side and the reactive tank of bottom respectively, vent gas treatment pond is connected by exhaust collection pipe with between reactive tank;
The sidewall of described reactive tank is provided with the soil charging aperture be connected with described soil liquefaction device, the gas feed be connected with high-temperature gas release device and liquid level sensor;
Reactive tank inside is provided with agitator, and the bottom of reactive tank is provided with Dump gate;
The sidewall in described gas treatment pond is provided with treatment fluid import and treatment fluid outlet; One end of described exhaust collection pipe is positioned at reactive tank, and the other end is positioned at vent gas treatment pond, and the snakelike blast pipe that the exhaust collection Guan Yuyi being positioned at vent gas treatment pond (10) is arranged on reaction tank bottom is connected;
Described agitator comprises shaft and drive motors;
Also comprise control assembly, described control assembly respectively with described viscosity sensor, inlet valve, slush pump, liquid level sensor and drive motors control connection;
It is characterized in that comprising following step:
S1, contaminated soil mix with water in soil liquefaction device, and control assembly controls the inlet valve on described soil liquefaction device, after viscosity reaches requirement, close inlet valve, drive slush pump to slurry conveyed in reactive tank;
S2, liquid level sensor send detection signal to control assembly after mud being detected, and control assembly controls drive motors and rotates, and drive motors drives shaft to stir;
S3, high temperature and high pressure gas enter reactive tank from air intlet, and high temperature and high pressure gas fully contacts Soil slurry, accelerate organic pollution effusion;
The air with pollutant produced in S4, reactive tank is collected by the exhaust collection pipe be located in reactive tank, then enters vent gas treatment pond through the outlet of exhaust collection pipe;
S5, Soil K+adsorption equipment are monitored soil, the testing result that soil quality detects is delivered on Dump gate on-off controller, by presetting the processing requirements to soil quality, when testing result meets the requirements, Dump gate on-off controller automatically controls sled drive mechanism and opens Dump gate and carry out discharging.
Further, the outlet of exhaust collection pipe is connected with snakelike blast pipe, snakelike blast pipe is located at bottom vent gas treatment pond, snakelike blast pipe is double-decker, tube wall is provided with steam vent, gas enters vent gas treatment pond by the steam vent of snakelike blast pipe and processes, and the gas after process is discharged from treatment pond upper end open.
Further, shaft is provided with paddle, and the surface of paddle is provided with some projections.
Further, described Dump gate comprises doorframe, rail plate, slide plate and sled drive mechanism, and described doorframe is provided with rail plate, and described sled drive mechanism drives described slide plate slide on described rail plate thus open or close Dump gate.
Described exhaust collection pipe is provided with magnetic valve, described magnetic valve and Soil K+adsorption equipment control connection.
Described sled drive mechanism and Soil K+adsorption equipment control connection.
The invention has the beneficial effects as follows:
The first, agitator is equipped with in the present invention, can fully make high temperature and high pressure gas contact with Soil slurry, improves treatment effeciency.
The second, reactive tank is provided with soil sample mouth, and the testing result that soil quality detects is delivered to Dump gate on-off controller.When testing result meets the requirements, Dump gate on-off controller automatically controls sled drive mechanism and opens Dump gate discharging.This process automation degree is high, automatically can carry out next step soil treatment after discharging completes.
Three, this device bottom is provided with Dump gate, is slide type push-pull configuration, and after convenient process, the discharge of soil, is conducive to equipment cleaning.
Four, this equipment blast pipe is snakelike double-decker, and tube wall is provided with steam vent, increases vent gas treatment amount.
Five, this equipment exhaust collection pipe is equipped with magnetic valve, prevents from liquid backflow and can regulate and control tail gas entering treatment pond flow, thus controls vent gas treatment quality.
accompanying drawing illustrates:
Fig. 1 is soil pollution prosthetic appliance structure chart of the present invention;
Fig. 2 is soil pollution prosthetic appliance agitator structure figure of the present invention;
Fig. 3 is soil pollution prosthetic appliance coiled pipe structure chart of the present invention;
Fig. 4 is soil pollution prosthetic appliance Dump gate structure chart of the present invention;
Wherein, 1, charging aperture; 2, air intlet; 3, treatment fluid entrance; 4, treatment fluid outlet; 5, agitator; 5-1, shaft; 5-2, paddle, 5-3, projection; 6, Dump gate; 6-1, slide plate; 6-2, doorframe; 6-3, rail plate; 7, exhaust collection pipe; 8, snakelike blast pipe; 9, reactive tank; 10, vent gas treatment pond; 11, liquid level; 12, magnetic valve; 13, soil sample mouth.
Detailed description of the invention
A restorative procedure for contaminated soil, relies on automatic prosthetic appliance, and as shown in Figure 1, automatic prosthetic appliance comprises soil liquefaction device and soil remediation equipment;
Described soil remediation equipment comprises a shell, and enclosure is become upper and lower two parts by a baffle for separating, is be positioned at the vent gas treatment pond 10 of its upper side and the reactive tank 9 of bottom respectively, is connected between vent gas treatment pond 10 with reactive tank 9 by exhaust collection pipe 7;
Soil liquefaction device comprises mixing pit, water inlet pipe and slush pump; Be provided with viscosity sensor in mixing pit, water inlet pipe is provided with magnetic valve, and slush pump is connected with mixing pit by pipeline;
The sidewall of described reactive tank 9 is provided with the soil charging aperture 1 be connected with described soil liquefaction device, the gas feed 2 be connected with high-temperature gas release device and liquid level sensor, and described liquid level sensor responds to the amount of pouring into of mud in described reactive tank;
Reactive tank 9 inside is provided with agitator 5, and the bottom of reactive tank 9 is provided with Dump gate 6;
The sidewall in described gas treatment pond 10 is provided with treatment fluid import 3 and treatment fluid outlet 4; One end of described exhaust collection pipe 7 is positioned at reactive tank 9, and the other end is positioned at vent gas treatment pond 10, and the snakelike blast pipe 8 that the exhaust collection pipe 7 and being positioned at vent gas treatment pond 10 is arranged on bottom reactive tank 9 is connected;
Described agitator 5 comprises shaft and drive motors;
Also comprise control assembly, described control assembly respectively with described viscosity sensor, inlet valve, slush pump, liquid level sensor and drive motors control connection.
Comprise following step:
S1, contaminated soil mix with water in soil liquefaction device, and control assembly controls the inlet valve on described soil liquefaction device, after viscosity reaches requirement, close inlet valve, drive slush pump to slurry conveyed in reactive tank 9;
S2, liquid level sensor send detection signal to control assembly after mud being detected, and control assembly controls drive motors and rotates, and drive motors drives shaft to stir;
S3, high temperature and high pressure gas enter reactive tank 9 from air intlet 2, and high temperature and high pressure gas fully contacts Soil slurry, accelerate organic pollution effusion;
The air with pollutant produced in S4, reactive tank 9 is collected by the exhaust collection pipe 7 be located in reactive tank 9, then enters vent gas treatment pond 10 through exhaust collection pipe 7 outlet;
S5, Soil K+adsorption equipment are monitored soil, the testing result that soil quality detects is delivered on Dump gate 6 on-off controller, by presetting the processing requirements to soil quality, when testing result meets the requirements, Dump gate 6 on-off controller automatically controls sled drive mechanism and opens Dump gate 6 and carry out discharging.
As the further prioritization scheme of the inventive method, described exhaust collection pipe 7 is equipped with magnetic valve 12, and magnetic valve 12 both prevented liquid backflow, can control exhaust flow simultaneously.Exhaust collection pipe 7 outlet is connected with snakelike blast pipe 8, and snakelike blast pipe 8 is located at bottom vent gas treatment pond 10.Snakelike blast pipe 8 is double-decker, and tube wall is provided with steam vent, and gas enters vent gas treatment pond by the steam vent of snakelike blast pipe 8 and processes.Gas after process is discharged from treatment pond upper end open.
As shown in Figure 2, be the agitator 5 of soil pollution prosthetic appliance of the present invention, this agitator 5 surface is also provided with raised points, increases mixing effect, and then improves reactive tank 9 efficiency.
As shown in Figure 3, be the snakelike blast pipe 8 of soil pollution prosthetic appliance of the present invention, manage as two-layer, be arranged on bottom treatment pond 10, tube wall has steam vent, can fully make tail gas contact with reactant liquor, improve treatment effect.
As shown in Figure 4, as present invention further optimization scheme, described Dump gate 6 comprises doorframe 6-2, rail plate 6-3, slide plate 6-1 and sled drive mechanism, described doorframe 6-2 is provided with rail plate 6-3, and described sled drive mechanism drives described slide plate 6-1 slide on described rail plate 6-3 thus open or close Dump gate 6.
Claims (6)
1. a restorative procedure for contaminated soil, relies on automatic prosthetic appliance, and automatic prosthetic appliance comprises soil liquefaction device and soil remediation equipment;
Described soil remediation equipment comprises a shell, enclosure is become upper and lower two parts by a baffle for separating, be be positioned at the vent gas treatment pond (10) of its upper side and the reactive tank (9) of bottom respectively, be connected by exhaust collection pipe (7) between vent gas treatment pond (10) with reactive tank (9);
Soil liquefaction device comprises mixing pit, water inlet pipe and slush pump; Be provided with viscosity sensor in mixing pit, water inlet pipe is provided with magnetic valve, and slush pump is connected with mixing pit by pipeline;
The sidewall of described reactive tank (9) is provided with the soil charging aperture (1) be connected with described soil liquefaction device, the gas feed (2) be connected with high-temperature gas release device and liquid level sensor;
Reactive tank (9) inside is provided with agitator (5), and the bottom of reactive tank (9) is provided with Dump gate (6);
The sidewall of described gas treatment pond (10) is provided with treatment fluid import (3) and treatment fluid outlet (4); One end of described exhaust collection pipe (7) is positioned at reactive tank (9), and the other end is positioned at vent gas treatment pond (10), and the snakelike blast pipe (8) that the exhaust collection pipe (7) and being positioned at vent gas treatment pond (10) is arranged on bottom reactive tank (9) is connected;
Described agitator (5) comprises shaft and drive motors;
Also comprise control assembly, described control assembly respectively with described viscosity sensor, inlet valve, slush pump, liquid level sensor and drive motors control connection;
It is characterized in that comprising following step:
S1, contaminated soil mix with water in soil liquefaction device, and control assembly controls the inlet valve on described soil liquefaction device, after viscosity reaches requirement, close inlet valve, drive slush pump to slurry conveyed in reactive tank (9);
S2, liquid level sensor send detection signal to control assembly after mud being detected, and control assembly controls drive motors and rotates, and drive motors drives shaft to stir;
S3, high temperature and high pressure gas enter reactive tank (9) from air intlet (2), and high temperature and high pressure gas fully contacts Soil slurry, accelerate organic pollution effusion;
The air with pollutant produced in S4, reactive tank (9) is collected by the exhaust collection pipe (7) be located in reactive tank (9), then enters vent gas treatment pond (10) through exhaust collection pipe (7) outlet;
S5, Soil K+adsorption equipment are monitored soil, the testing result that soil quality detects is delivered on Dump gate (6) on-off controller, by presetting the processing requirements to soil quality, when testing result meets the requirements, Dump gate (6) on-off controller automatically controls sled drive mechanism and opens Dump gate (6) and carry out discharging.
2. the restorative procedure of contaminated soil according to claim 1, it is characterized in that, exhaust collection pipe (7) outlet is connected with snakelike blast pipe (8), snakelike blast pipe (8) is located at bottom, vent gas treatment pond (10), snakelike blast pipe (8) is double-decker, tube wall is provided with steam vent, and gas enters vent gas treatment pond by the steam vent of snakelike blast pipe (8) and processes, and the gas after process is discharged from treatment pond upper end open.
3. the restorative procedure of contaminated soil according to claim 1, is characterized in that, shaft is provided with paddle, and the surface of paddle is provided with some projections.
4. the restorative procedure of contaminated soil according to claim 1, it is characterized in that, described Dump gate (6) comprises doorframe (6-2), rail plate (6-3), slide plate (6-1) and sled drive mechanism, described doorframe (6-2) is provided with rail plate (6-3), and described sled drive mechanism drives described slide plate (6-1) in the upper slip of described rail plate (6-3) thus opens or closes Dump gate (6).
5., according to the restorative procedure of described contaminated soil arbitrary in claim 1 ~ 4, it is characterized in that, described exhaust collection pipe (7) is provided with magnetic valve, described magnetic valve and Soil K+adsorption equipment control connection.
6. the restorative procedure of contaminated soil according to claim 5, is characterized in that, described sled drive mechanism and Soil K+adsorption equipment control connection.
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| CN201510501936.7A CN105057335A (en) | 2015-08-14 | 2015-08-14 | Contaminated soil remediation method |
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| CN201510501936.7A CN105057335A (en) | 2015-08-14 | 2015-08-14 | Contaminated soil remediation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110918641A (en) * | 2019-12-11 | 2020-03-27 | 邵智勇 | Heavy metal soil remediation plant volatilization method tail gas processing apparatus |
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| JP2000061443A (en) * | 1998-08-18 | 2000-02-29 | Ohbayashi Corp | Device for separating and removing harmful material |
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| CN110918641A (en) * | 2019-12-11 | 2020-03-27 | 邵智勇 | Heavy metal soil remediation plant volatilization method tail gas processing apparatus |
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Application publication date: 20151118 |