CN202411085U - Supercutical fluid repair processing system for polluted soil - Google Patents
Supercutical fluid repair processing system for polluted soil Download PDFInfo
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- CN202411085U CN202411085U CN2012200070443U CN201220007044U CN202411085U CN 202411085 U CN202411085 U CN 202411085U CN 2012200070443 U CN2012200070443 U CN 2012200070443U CN 201220007044 U CN201220007044 U CN 201220007044U CN 202411085 U CN202411085 U CN 202411085U
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Abstract
The utility model relates to a supercutical fluid repair processing system for polluted soil, belonging to the field of environmental geotechnics. The supercutical fluid repair processing system mainly comprises a feeding device, an extraction device and a discharge device, and can extract and repair the supercutical fluid of the polluted soil, so that the secondary pollution can be avoided; different pollution components can be simultaneously extracted by the same equipment during the same repair processing process, and the extraction range is wide; the continuous operations of the soil extraction and repair is carried out, and the repair cost is reduced; by a vertical ribbon stirrer, the soil penetrating quality is strengthened, the contact area and the contact chance of the polluted soil and an extractant are increased, and the extraction efficiency is improved; no air is mixed during the extraction process, and no extractant is lost, so that the purity of the extractant is guaranteed, and the loss of the extractant is avoided; and the processing process can be intelligently controlled, so that the intelligent control on different pollution component extraction parameters can be realized, the processing cost is minimized, and the normal operation of the equipment can be guaranteed.
Description
Technical field
The utility model relates to a kind of supercritical fluid restoration processing system of contaminated soil, is mainly used in the quick dystopy repair process of organic polluted soil, belongs to the environmental geotechnical field.
Background technology
Along with developing rapidly of China's industrial or agricultural, all contaminations, particularly organic pollution are discharged in air, water body and the soil.Soil is as the final home to return to of all contaminations, and accumulating in a large number of pollutant becomes one of its main pollution problem.Pollutant not only influences growth and development of plant and biocenological variation after getting into soil, causes the decline of grain yield and quality, and agricultural product security is constituted a serious threat, and also can cause secondary pollution to surface water, underground water etc.Toxic pollutant gets into human body through food chain, and further harm humans is healthy.In recent years, China's soil pollution problem shows especially day by day, and the agricultural product quality and safety problem and the Mass disturbance that are caused by soil pollution increase year by year.Therefore, repairing polluted soil has become the important topic of environmental science in recent decades, and research and development novel economizer contaminated soil recovery technique and relevant device efficiently is an urgent demand that improves China's environmental quality, also is the research focus of world technology.
In the past few decades, people attempt to repair by the organic pollution contaminated soil through various means.Because a variety of causes, these methods are very not successful.In the later stage eighties, part scholar focuses onto on the supercritical fluid.Supercritical fluid is meant that material is in the above and fluid of a kind of special state of forming of its critical-temperature and critical pressure; Be widely used in from petroleum residual oil, reclaiming oil product at present, from coffee, extract caffeine, from hops in the industry such as effective component extracting, realized that supercritical liquid extraction technique is from theoretical research, the medium and small level transformation to extensive industrialization.Under super critical condition, some fluid, very little like the viscosity coefficient of carbon dioxide etc., help the diffusion of solute, thereby have good mass transfer characteristic.Have less surface tension simultaneously, be easy to enter into soil or sedimental fine pore, thereby organic matter is extracted soon.Therefore, it is feasible adopting the supercritical fluid extraction repairing polluted soil, and have the extraction time short, solvent load is few, easy to operate, extraction efficiency is high, non-environmental-pollution, and can realize characteristics such as high selectivity extraction through changing extraction conditions.
At present, existing both at home and abroad minority scholar has carried out the correlative study of supercritical fluid repairing polluted soil.For example, people such as Snyder adopts supercritical extraction technique to extract organochlorine, organophosphorous ester in soil, sand silt and the rivers deposit; The organic compound in the soil that people such as Erkey have adopted supercritical carbon dioxide extraction; Ashraf etc. have studied the influence of temperature to phenolic compound extraction efficiency in the pedotheque.But still do not have the research and development of relevant device at present, cause the research of supercritical fluid repairing polluted soil still to rest on theoretical research and laboratory test stage, more do not have relevant scale property simulated test and engineering construction.Therefore, the supercritical fluid repair process equipment of exploitation contaminated soil is for the development of the supercritical fluid recovery technique that promotes contaminated soil with promote its practical applications and have great importance.
Summary of the invention
To the problem of above-mentioned existence, the purpose of the utility model is to provide a kind of system that adopts supercritical fluid to carry out the contaminated soil heterotopic repair process.
Its technical solution is:
The supercritical fluid restoration processing system of contaminated soil is made up of feed arrangement, extraction equipment, device for discharging, pressure-reducing valve, primary heater, gas separation bin, contaminant collector, ultrafilter, active carbon filter, gaseous state extractant holding vessel, condenser, liquid extractant holding vessel, liquid extractant pump, secondary heater, catalyst storage tank, air pump, valve, pipeline; Feed arrangement is made up of first vavuum pump and head tank; Pipeline connects between the head tank and first vavuum pump, connects pipeline and is provided with valve, and head tank top is provided with charging aperture; The charging aperture top is provided with the charging seal cover; The charging seal cover is provided with first relief valve, and the head tank bottom is provided with first blanking port, and first blanking port is provided with inlet valve; Extraction equipment is made up of motor, extractor, temperature sensor, pressure sensor and vertical ribbon stirrer; Vertical ribbon stirrer is arranged in the extractor, and vertical ribbon stirrer rotating shaft is connected with motor, and the inwall of extractor is provided with temperature sensor and pressure sensor; Extractor top is fixedly connected with first blanking port on the head tank; The extractor bottom is provided with second blanking port, and second blanking port is provided with discharge valve, and device for discharging is made up of the discharge tank and second vavuum pump; Pipeline connects between the discharge tank and second vavuum pump; Connect pipeline and be provided with valve, discharge tank top is fixedly connected with second blanking port on the extractor, and the discharge tank bottom is provided with discharging opening; Discharging opening is provided with the discharging seal cover; The discharging seal cover is provided with second relief valve, and successively through the bottom of pressure-reducing valve, primary heater, gas separation bin, valve, ultrafilter, active carbon filter, valve, gaseous state extractant holding vessel, valve, condenser, valve, liquid extractant holding vessel, liquid extractant pump, valve, secondary heater, valve, catalyst storage tank and valve tieback to extractor, extractor sidewall top is provided with the pipeline that connects gaseous state extractant holding vessel through pipeline at the extractor top; Connect pipeline and be provided with valve; Discharge tank sidewall top is connected to ultrafilter through valve, air pump successively through pipeline, and discharge tank sidewall below is connected to gaseous state extractant holding vessel through pipeline, connects pipeline and is provided with valve.
The bottom of described head tank, extractor and discharge tank is respectively cone.
Described gas separation bin below is provided with contaminant collector, and pipeline connects between gas separation bin and the contaminant collector, and pipeline is provided with valve.
Owing to adopted above technical scheme, the supercritical fluid restoration processing system of the contaminated soil of the utility model to realize that the dystopy of contaminated soil repairs fast, had following technical characterstic and advantage:
1. compare in other contaminated soil restorative procedure,, avoided second environmental pollution owing to adopted the supercritical fluid of environmentally safe to carry out soil remediation.
2. to different pollutant components; Can be through adopting different extractants and catalyst; Or the temperature and pressure of control extractant fluid both can successively extract the size of different pollutant components in the soil according to solubility; Extraction when same equipment, same repair process can be realized different pollutant component, the extraction scope is wide, and remediation efficiency is high.
3. before and after extraction equipment, be provided with feed arrangement and device for discharging respectively, and separate with inlet valve and discharge valve, charging, extraction and discharge process do not disturb mutually, have realized the continuous operation that the soil extraction is repaired, and have saved extractant, have reduced rehabilitation cost.
4. the vertical ribbon stirrer that is provided with in the extractor can make contaminated soil spin upside down, break up and mixes stirring, has strengthened the soil permeability performance, has increased and extractant contact area and touch opportunity, has improved extraction efficiency.
5. be provided with vacuum extractor and be used for the air pump and the pipeline of Gas Recovery, in whole extraction process, no air is sneaked in the extractant, and does not have extractant and be lost in the air, has guaranteed the purity of extractant, has also avoided the loss of extractant.
6. the temperature sensor in the extractor links to each other with computer with pressure sensor; Parameters such as treatment bin internal pressure and temperature have been optimized in the intellectuality control of processing procedure; Realized processing cost being minimized to the Based Intelligent Control of different pollutant components extraction parameters, and the timely ruuning situation of feedback device; So that abnormal conditions are in time handled, make the normal operation of equipment obtain powerful guarantee.
The contaminated soil restoration processing system of the utility model is rational in infrastructure, simple to operate, easy to use, non-secondary pollution, processing cost is low, efficient is high, applied widely, treated contaminated soil sanitation degree can reach more than 95%.
Description of drawings
Accompanying drawing is the structural representation of supercritical fluid restoration processing system of the contaminated soil of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is explained in further detail: see accompanying drawing
The supercritical fluid restoration processing system of contaminated soil is made up of feed arrangement, extraction equipment, device for discharging, pressure-reducing valve 20, primary heater 21, gas separation bin 22, contaminant collector 23, ultrafilter 24, active carbon filter 25, gaseous state extractant holding vessel 26, condenser 27, liquid extractant holding vessel 31, liquid extractant pump 30, secondary heater 29, catalyst storage tank 28, air pump 32, valve, pipeline, and feed arrangement is made up of with head tank 5 first vavuum pump 1, and pipeline connects between the head tank 5 and first vavuum pump 1; Connect pipeline and be provided with valve, head tank 5 tops are provided with charging aperture 4, and charging aperture 4 tops are provided with charging seal cover 3; Charging seal cover 3 is provided with first relief valve 2; Head tank 5 bottoms are provided with first blanking port, 6, the first blanking ports 6 and are provided with inlet valve 7, and extraction equipment is made up of motor 8, extractor 9, temperature sensor 10, pressure sensor 11 and vertical ribbon stirrer 12; Vertical ribbon stirrer 12 is arranged in the extractor 9; Vertical ribbon stirrer 12 rotating shafts are connected with motor 8, and by the opening and closing of the vertical ribbon stirrer 12 of motor 8 controls, the inwall of extractor 9 is provided with temperature sensor 10 and pressure sensor 11; Temperature sensor 10 is connected with computer by cable respectively with pressure sensor 11; Can obtain the temperature and pressure parameter in the extractor 9 at any time, computer is connected with liquid extractant pump 30 with secondary heater 29 simultaneously, with temperature and the pressure in the control extractor 9; Extractor 9 tops are fixedly connected with first blanking port 6 on the head tank 5; Extractor 9 bottoms are provided with second blanking port, 13, the second blanking ports 13 and are provided with discharge valve 14, and device for discharging is made up of the discharge tank 16 and second vavuum pump 15; Pipeline connects between the discharge tank 16 and second vavuum pump 15; Connect pipeline and be provided with valve, discharge tank 16 tops are fixedly connected with second blanking port 13 on the extractor 9, and discharge tank 16 bottoms are provided with discharging opening 17; Discharging opening 17 is provided with discharging seal cover 18; Discharging seal cover 18 is provided with second relief valve 19, and extractor 9 tops successively through the bottom of pressure-reducing valve 20, primary heater 21, gas separation bin 22, valve, ultrafilter 24, active carbon filter 25, valve, gaseous state extractant holding vessel 26, valve, condenser 27, valve, liquid extractant holding vessel 31, liquid extractant pump 30, valve, secondary heater 29, valve, catalyst storage tank 28 and valve tieback to extractor 9, form the extractant main circulation loop of repair system through pipeline; Extractor 9 sidewalls top is provided with the pipeline that connects gaseous state extractant holding vessel 26; Connect pipeline and be provided with valve, be used for to charging into extraction gas in the extractor 9, discharge tank 16 sidewalls top is connected to ultrafilter 24 through valve, air pump 32 successively through pipeline; Be used for the recycling of extraction gas in the discharge tank 16; Discharge tank 16 sidewalls below is connected to gaseous state extractant holding vessel 26 through pipeline, connects pipeline and is provided with valve, is used for charging into extraction gas to discharge tank 16.The bottom of head tank 5, extractor 9 and discharge tank 16 is respectively cone, just the discharge of soil.Gas separation bin 22 belows are provided with contaminant collector 23, and pipeline connects between gas separation bin 22 and the contaminant collector 23, and pipeline is provided with valve.
The operation principle of the supercritical fluid restoration processing system of contaminated soil:
1. close all valves, open charging seal cover 3 and inlet valve 7 on the head tank 5, insert an amount of pending contaminated soil, it is got in the extractor 9 through head tank 5 backs, close charging seal cover 3.Open between first vavuum pump 1 and the head tank 5 valve on the pipeline between the valve on the pipeline and second vavuum pump 15 and discharge tank 16.Start first vavuum pump 1 and second vavuum pump 15, after the air in head tank 5, extractor 9 and the discharge tank 16 is found time, close above-mentioned two valves again, in order to avoid air is sneaked in the extractant.Close first vavuum pump 1, second vavuum pump 15 and inlet valve 7.Open the valve on the pipeline that extractor 9 sidewalls tops is connected in gaseous state extractant holding vessel 26; Open the valve on the pipeline that discharge tank 16 sidewalls belows is connected in gaseous state extractant holding vessel 26, make in extractor 9 and the discharge tank 16 and close two valves again behind the gas pressures and gaseous state extractant holding vessel 26 interior gas pressure balancings.
2. open the valve on the pipeline between condenser 27 and condenser 27 and the liquid extractant holding vessel 31, make that the gaseous state extractant is stored in the liquid extractant holding vessel 31 in the gaseous state extractant holding vessel 26 after condenser 27 is condensed into liquid state.
3. open the valve on the pipeline that is connected between extractor 9 bottoms and the liquid extractant pump 30 and be connected in extractor 9 tops and gaseous state extractant holding vessel 26 between pipeline on valve and pressure-reducing valve 20.Start liquid extractant pump 30, make liquid extractant after secondary heater 29 is heated to supercriticality, the catalyst in the entrained catalyst holding vessel 28 gets in the extractor 9.
4. open motor 8, start vertical ribbon stirrer 12, stir soil, soil is fully contacted with extractant.Can pass through the temperature and pressure parameter that temperature sensor 10 and pressure sensor 11 obtain in the extractors 9 this moment, and pass to secondary heater 29 and liquid extractant pump 30, to control suitable extractant temperature and pressure through computer.
5. the supercritical extract agent that is dissolved with pollutant is through pressure-reducing valve 20 decompressions; And by becoming gaseous state after the primary heater 21 suitable heating; In gas separation bin 22 with separated from contaminants; Pollutant is collected in the contaminant collector 23, and the gaseous state extractant gets into gaseous state extractant holding vessel 26 again or after condenser 27 condensations, is stored in the liquid extractant holding vessel 31 after ultrafilter 24 and active carbon filter 25 filter, participate in cycling extraction next time.
6. after contaminated soil is finished dealing with, close all valves, motor and air pump.Open discharge valve 14, the soil after the processing is got in the discharge tank 16.Open and be connected in above discharge tank 16 sidewalls and valve on the pipeline between the ultrafilter 24 and the valve between air pump 32 and active carbon filter 25 and the gaseous state extractant holding vessel 26; After reclaiming in the extractant suction gaseous state extractant holding vessel 26 in extractor 9 and the discharge tank 16, close above-mentioned valve again.
7. close discharge valve 14, after 19 pressure releases of second relief valve, open discharging seal cover 18, soil is discharged from discharging opening 17, close discharging seal cover 18.At this moment, can successively open the inlet valve 7 and first relief valve 2, after head tank 5 and extractor 9 pressure releases, new pending soil inserted in the extractor 9, beginning is extraction next time.
The above-mentioned work that circulates both can realize the continuous extraction of contaminated soil.In whole extraction process, no air is sneaked in the extractant, and does not have extractant and be lost in the air, has guaranteed the purity of extractant, has also avoided the loss of extractant.
Claims (3)
1. the supercritical fluid restoration processing system of contaminated soil; It is characterized in that: the supercritical fluid restoration processing system of described contaminated soil is made up of feed arrangement, extraction equipment, device for discharging, pressure-reducing valve (20), primary heater (21), gas separation bin (22), contaminant collector (23), ultrafilter (24), active carbon filter (25), gaseous state extractant holding vessel (26), condenser (27), liquid extractant holding vessel (31), liquid extractant pump (30), secondary heater (29), catalyst storage tank (28), air pump (32), valve, pipeline; Feed arrangement is made up of first vavuum pump (1) and head tank (5); Pipeline connects between head tank (5) and first vavuum pump (1); Connect pipeline and be provided with valve; Head tank (5) top is provided with charging aperture (4); Charging aperture (4) top is provided with charging seal cover (3); Charging seal cover (3) is provided with first relief valve (2), and head tank (5) bottom is provided with first blanking port (6), and first blanking port (6) is provided with inlet valve (7); Extraction equipment is made up of motor (8), extractor (9), temperature sensor (10), pressure sensor (11) and vertical ribbon stirrer (12); Vertical ribbon stirrer (12) is arranged in the extractor (9), and vertical ribbon stirrer (12) rotating shaft is connected with motor (8), and the inwall of extractor (9) is provided with temperature sensor (10) and pressure sensor (11); Extractor (9) top is fixedly connected with first blanking port (6) on the head tank (5); Extractor (9) bottom is provided with second blanking port (13), and second blanking port (13) is provided with discharge valve (14), and device for discharging is made up of discharge tank (16) and second vavuum pump (15); Pipeline connects between discharge tank (16) and second vavuum pump (15); Connect pipeline and be provided with valve, discharge tank (16) top is fixedly connected with second blanking port (13) on the extractor (9), and discharge tank (16) bottom is provided with discharging opening (17); Discharging opening (17) is provided with discharging seal cover (18); Discharging seal cover (18) is provided with second relief valve (19), and successively through the bottom of pressure-reducing valve (20), primary heater (21), gas separation bin (22), valve, ultrafilter (24), active carbon filter (25), valve, gaseous state extractant holding vessel (26), valve, condenser (27), valve, liquid extractant holding vessel (31), liquid extractant pump (30), valve, secondary heater (29), valve, catalyst storage tank (28) and valve tieback to extractor (9), extractor (9) sidewall top is provided with the pipeline that connects gaseous state extractant holding vessel (26) through pipeline at extractor (9) top; Connect pipeline and be provided with valve; Discharge tank (16) sidewall top is connected to ultrafilter (24) through valve, air pump (32) successively through pipeline, and discharge tank (16) sidewall below is connected to gaseous state extractant holding vessel (26) through pipeline, connects pipeline and is provided with valve.
2. the supercritical fluid restoration processing system of contaminated soil as claimed in claim 1, it is characterized in that: the bottom of described head tank (5), extractor (9) and discharge tank (16) is respectively cone.
3. the supercritical fluid restoration processing system of contaminated soil as claimed in claim 1; It is characterized in that: described gas separation bin (22) below is provided with contaminant collector (23); Pipeline connects between gas separation bin (22) and the contaminant collector (23), and pipeline is provided with valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200070443U CN202411085U (en) | 2012-01-09 | 2012-01-09 | Supercutical fluid repair processing system for polluted soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200070443U CN202411085U (en) | 2012-01-09 | 2012-01-09 | Supercutical fluid repair processing system for polluted soil |
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| Publication Number | Publication Date |
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| CN202411085U true CN202411085U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200070443U Withdrawn - After Issue CN202411085U (en) | 2012-01-09 | 2012-01-09 | Supercutical fluid repair processing system for polluted soil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527709A (en) * | 2012-01-09 | 2012-07-04 | 中国科学院武汉岩土力学研究所 | Supercritical fluid restoration treatment system of polluted soil |
| CN108246790A (en) * | 2018-01-02 | 2018-07-06 | 昆明理工大学 | A kind of method for repairing phenol organic matter contaminated soil |
| CN108526207A (en) * | 2018-04-19 | 2018-09-14 | 南安市创培电子科技有限公司 | A kind of soil cleaning equipment |
-
2012
- 2012-01-09 CN CN2012200070443U patent/CN202411085U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527709A (en) * | 2012-01-09 | 2012-07-04 | 中国科学院武汉岩土力学研究所 | Supercritical fluid restoration treatment system of polluted soil |
| CN102527709B (en) * | 2012-01-09 | 2013-07-10 | 中国科学院武汉岩土力学研究所 | Supercritical fluid restoration treatment system of polluted soil |
| CN108246790A (en) * | 2018-01-02 | 2018-07-06 | 昆明理工大学 | A kind of method for repairing phenol organic matter contaminated soil |
| CN108526207A (en) * | 2018-04-19 | 2018-09-14 | 南安市创培电子科技有限公司 | A kind of soil cleaning equipment |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120905 Effective date of abandoning: 20130710 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120905 Effective date of abandoning: 20130710 |
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| RGAV | Abandon patent right to avoid regrant |