CN102974607B - Elution repairing device and repairing method of arsenic polluted soil and wastes - Google Patents

Elution repairing device and repairing method of arsenic polluted soil and wastes Download PDF

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Publication number
CN102974607B
CN102974607B CN 201210563898 CN201210563898A CN102974607B CN 102974607 B CN102974607 B CN 102974607B CN 201210563898 CN201210563898 CN 201210563898 CN 201210563898 A CN201210563898 A CN 201210563898A CN 102974607 B CN102974607 B CN 102974607B
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China
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drip washing
eluent
tank
arsenic
liquid
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CN 201210563898
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Chinese (zh)
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CN102974607A (en
Inventor
阎秀兰
廖晓勇
王建益
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中国科学院地理科学与资源研究所
北京中科九州环境工程有限责任公司
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Priority to CN 201210563898 priority Critical patent/CN102974607B/en
Publication of CN102974607A publication Critical patent/CN102974607A/en
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Abstract

The invention provides an elution repairing device and a repairing method of arsenic polluted soil and wastes. The elution repairing device is formed by a spraying device, an eluting groove, a material unloading switch, a filtering anti-blocking device, a waste liquid sampling opening, an eluting waste liquid treating tank, an arsenic adsorption device, an arsenic adsorption material replacing switch, an eluting filtering liquid storage tank, a first liquid gauge, a first electric pump, an eluting agent storing tank, a dry powder hopper, a material adding motor, a level meter, a first solenoid valve, a tap water inlet pipeline, an agitating device, a second liquid gauge, a solution concentration detection device, a second solenoid valve, a second electric pump, a flow meter, an eluting agent conveying pipeline, an alarm, a touch screen operation system, a master switch and an electric control cabinet. According to the elution repairing device and repairing method of the arsenic polluted soil and the wastes, an eluting system, an eluting waste liquid recycling system and a control system are organically combined together to form a set of a dislocated elution repairing device with alow secondary pollution risk; the high-concentration arsenic polluted soil and the wastes can be rapidly and efficiently repaired; and meanwhile, low emission is realized, and the elution repairing device and repairing method are energy-saving, efficient, safe and environment-friendly.

Description

Drip washing prosthetic device and the restorative procedure of a kind of As polluted soil and discarded object
Technical field
The present invention relates to a kind of As polluted soil and discarded object (mine tailings, bed mud) drip washing recovery technique and waste liquid recycling technology, particularly drip washing prosthetic device and the restorative procedure of a kind of As polluted soil and discarded object, belong to field of environment engineering technology, realize that Soil leaching and percolate process the integrated of recycle and reuse, can be widely used in the various arsenic-containing wastes that in the industries such as Soil leaching, chemical industry, metallurgy, produce processing.
Background technology
Because extensive existence and the use of arsenic cause many national arsenic contamination situations serious.All be subject to serious arsenic contamination at many farmlands of N.J., the soil in orchard, according to statistics, between 1900 to 1980, nearly 6804 tons arsenic enters into soil with the form of agricultural chemicals, and the annual arsenic that enters the soil from atmosphere of Belgium is 15g/ha.In Australia, total above 10,000 arsenic in soil contaminated sites.Environmental Protection Agency (USEPA) is decided to be arsenic one of five large harmful elements of table soil pollution.China is mining powers, arsenic minerals extensively is distributed in the provinces and regions such as the Central-South and southwestern Hunan of China, Yunnan, Guangxi, Guangdong, these areas contain in the exploitation of arsenic minerals or the smelting process very easily causes near soil pollution, simultaneously, produce a large amount of arsenic contamination discarded objects, according to incompletely statistics, between 1956 to 1984, once occured more than 30 and played the arsenic contamination poisoning.In some areas of south China, the arsenic contamination phenomenon of mining and smeltery's rice terrace is on the rise, and the large-area paddy rice in Changning, Hunan county has been subjected to arsenic contamination, and its content is 92-840mg/kg, head and shoulders above the background value of soil.The soil that Guangxi, Hunan two provinces are subject to arsenic contamination has thousands of square kilometres at least.In addition, China is dirty fills with in the soil pollution that causes, arsenic occupies the 5th.
Repairing As polluted soil and discarded object is a problem demanding prompt solution, and elution method is used by some country's researchs as a kind of effective means.Elution method is the process of using physics or chemical means that the organic and inorganic pollution in the contaminated soil is separated, isolates, concentrates or carry out harmless treatment.Leacheate can be water, chemical solution, and simultaneously, the arsenic waste solution processing that contains after the drip washing has become now stubborn problem.
According to available data, have the following disadvantages for heavy-metal contaminated soil and discarded object drip washing prosthetic device and ring waste processing method at present: the pretreatment process such as (1) soil and discarded object all need to sieve, stirring, the physicochemical property of the soil of heavy damage.(2) the device design is complicated, and the cost energy consumption is too high, and practicality is not strong.(3) to the removal of pollutants poor effect, the ring waste of generation does not have recycling, can cause secondary pollution to environment.
Summary of the invention
The technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, drip washing prosthetic device and restorative procedure a kind of semi-automation, that quick, economical, effective, original place dystopy/dystopy is used for As polluted soil and discarded object are provided, need just can directly not carry out drip washing through pre-treatment to As polluted soil and discarded object (mine tailings, bed mud), the method also can be applied to original place dystopy drip washing and repair other pollutants, realizes the ring waste cycling and reutilization.
The technology of the present invention solution: the drip washing prosthetic device of a kind of As polluted soil and discarded object comprises: spray device drip washing groove, the discharging switch, filter preventing clogging up device, the waste liquid sample tap, the ring waste process tank, the arsenic adsorbent equipment, arsenic adsorbent material is replaced switch, drip washing filtrate holding vessel, electrodynamic pump, the eluent hold-up tank, the dry powder hopper, the running water inlet channel, magnetic valve, motor feeds intake, level meter, liquid stirrer, liquid level gauge, the solution concentration verifying attachment, flowmeter, the eluent conveyance conduit, alarm, touch screen operating, electrical control cubicles forms; The arsenic adsorbent equipment is by punching corrosion resistant plate, punching pvc plate, 300g/m 2Long filament geotextiles, arsenic adsorbent material form.Describedly spray device, discharging switch, filter preventing clogging up device and be arranged in the drip washing groove, be respectively applied to the drip washing to pollutant, with the switch that pollutant is discharged, prevent that silt from stopping up the ring waste floss hole; The waste liquid sample tap is used for monitoring waste liquor contamination thing content; The arsenic adsorbent equipment is arranged in the ring waste process tank, is used for the purified treatment ring waste; Drip washing filtrate holding vessel is used for the eluent behind the reclaiming clean; Described level meter is installed in the dry powder hopper, is used for low alarm, and the motor that feeds intake is used for adding solid pharmaceutical preparation to the eluent hold-up tank, and dry powder hopper, running water inlet pipeline and electrodynamic pump are used for adding entry and liquid preparation to the eluent hold-up tank; Liquid stirring device is used for making eluent to mix, liquid level gauge and solution concentration verifying attachment, the volume and the concentration that are used for monitoring and regulating eluent in the hold-up tank; Magnetic valve, electrodynamic pump and flowmeter are used for controlling and are delivered to flow velocity and the consumption that sprays eluent in the device; Touch screen operating on the electrical control cubicles is used for the operation of all facilities of control, and alarm carries out early warning to the quantity of eluent and material.
Described As polluted soil and discarded object (mine tailings, bed mud) drip washing prosthetic device, control by touch screen operating, can select manual operation/automatically operation, also can option and installment solid pharmaceutical preparation/liquid preparation/recovery reagent, and the relevant parameters such as the ratio of adding can be set, and show the parameters such as instant eluent concentration, volume, flow.
Described arsenic contamination thing drip washing prosthetic device, when the dry powder material in hopper was positioned at low level, alarm can give the alarm, and reminded the operator to add materials; When liquid in the eluent hold-up tank is positioned at low liquid level, alarm also can give the alarm, simultaneously, and closed electromagnetic valve, electrodynamic pump stops to spraying pumping eluent in the device, another electrodynamic pump brings into operation the reagent in the drip washing filtrate holding vessel is pumped in the eluent hold-up tank, and this moment, system can open entering water electromagnetic valve automatically, and starts feed intake motor and liquid stirring device, begin batching, when liquid level attained to a high place in the preparation tank to be mixed, magnetic valve was opened, and electrodynamic pump restarts.
Described arsenic contamination thing drip washing arsenic adsorbent equipment is put arsenic adsorbent material (purity is that 99% di-iron trioxide and 99% active carbon consist of according to same ratio) by filling out in the middle of two-layer geotextiles and the punching PVC plate, and the bottom is supported as reinforcing for the punching corrosion resistant plate.
The present invention is used for repairing As polluted soil and discarded object (mine tailings, bed mud) method is as follows: the potassium dihydrogen phosphate solid pharmaceutical preparation is added in the dry powder hopper, to be no less than 5m3 arsenic contamination thing and be loaded into the drip washing groove, assembling arsenic adsorbent equipment in the ring waste process tank, utilize the touch screen operating on the electrical control cubicles, after setting relevant parameter, start automatically operation, entering water electromagnetic valve is opened automatically, feed intake motor and mixer starts automatically, the beginning configuration concentration is the potassium dihydrogen phosphate drip washing preparation of 8%-10%, liquid in the eluent hold-up tank is in low level, simultaneously, liquid in the drip washing filtrate holding vessel is in a high position, electrodynamic pump brings into operation the reagent in the drip washing filtrate holding vessel is pumped in the eluent hold-up tank, magnetic valve on the eluent conveyance conduit and electrodynamic pump are opened simultaneously, filling drip washing reagent in the drip washing groove, by the waste liquid sample tap drip washing effect is monitored, battery main switch is closed when concentration reaches preset value in the waste liquid, namely stop drip washing, the discharging switch opens is derived the pollutant after drip washing, again load pollutant, again start above-mentioned flow process.
Described As polluted soil and discarded object (mine tailings, bed mud) drip washing prosthetic device operating system is connected to the DCS control system of computer by wireless network, can record the relevant informations such as flow of inlet water in the whole lessivation, solid pharmaceutical preparation addition, liquid output flow, time by the data sheet in the DCS system, play the effect of monitoring and statistics.
Amending method of the present invention is pollutant earth to be placed spray device, utilizes the eluent of preparation that it is carried out the drip washing processing, recycling after the ring waste that produces purifies through arsenic adsorbent material.When liquid preparation is in low level in the eluent hold-up tank, system automatically starts electrodynamic pump the recovery reagent in the drip washing filtrate holding vessel is pumped in the eluent hold-up tank, simultaneously, also can and add the new eluent of running water preparation by hopper feed, eluent concentration is monitored by the solution concentration verifying attachment.React in spraying device with pollutant by eluent, arsenic adsorbent material purifies and reclaims ring waste, reaches the purpose of repairing the arsenic contamination thing.With elution circuit, ring waste recovery system and control system are organically combined, form the complete closed cycle original place dystopy of a cover/dystopy drip washing prosthetic device, can be used in effectively repairing fast of High Concentration of Arsenic contaminated soil and discarded object (mine tailings, bed mud), simultaneously, do not produce secondary pollution and realize zero-emission and energy-conservation, efficient, safety, environmental protection.
The present invention's advantage compared with prior art is:
(1) the present invention is with elution circuit, ring waste recycling system and control system is organically combined, form the complete semi-automation of a cover, quick, economic, effective original place dystopy or ex-situ chemical washing prosthetic device, can be used in effectively repairing fast of High Concentration of Arsenic contaminated soil and discarded object (mine tailings, bed mud), need just can directly not carry out drip washing through pre-treatment to As polluted soil and discarded object (mine tailings, bed mud), the method also can be applied to original place dystopy drip washing and repair other pollutants.
(2) the arsenic adsorbent equipment among the present invention can be processed recycling efficiently with a large amount of waste liquids that drip washing produces, the secondary pollution risk is low, realize zero-emission and energy-conservation, efficient, safety, environmental protection, the arsenic adsorbent equipment is fairly obvious to the treatment effect that contains the arsenic ring waste, and easily obtain, with low cost.
(3) the present invention also can monitor liquid inventory in the lessivation at any time, the solid pharmaceutical preparation dosage, and the liquid output flow, the parameters such as activity duration, and can carry out record to it by DCS.
(4) the present invention is applicable to As polluted soil and the discarded object (mine tailings, bed mud) of high concentration, as long as regulate the relevant parameters such as drip washing flow and concentration, can effectively repair pollutant.
(5) the present invention is by the adjustment of the relevant parameters such as eluent kind and concentration, also can be used for efficient drip washing to repair heavy-metal contaminated soil and the pollutant of other types.
(6) the present invention can both can configure solid pharmaceutical preparation according to the type of pollutant, also can configure the liquid eluent.
Description of drawings
Fig. 1 is prosthetic device composition frame chart of the present invention;
Fig. 2 is the flow chart (being software realization flow figure) of touch screen operating specific implementation of the present invention.
The specific embodiment
As shown in Figure 1, prosthetic device of the present invention comprises: spray device 1, drip washing groove 2, discharging switch 3, filter preventing clogging up device 4, waste liquid sample tap 5, ring waste process tank 6, arsenic adsorbent equipment 7, arsenic adsorbent material is replaced switch 8, drip washing filtrate holding vessel 9, the first liquid level gauge 10, the first electrodynamic pump 11, eluent hold-up tank 12, dry powder hopper 13, motor 14 feeds intake, level meter 15, the first magnetic valve 16, running water inlet channel 17, agitating device 18, the second liquid level gauge 19, solution concentration verifying attachment 20, the second magnetic valve 21, the second electrodynamic pump 22, flowmeter 23, eluent conveyance conduit 24, alarm 25, touch screen operating 26, master switch 27, electrical control cubicles 28; The described device 1 that sprays is connected with eluent conveyance conduit 24 and is positioned at the top of drip washing groove 2, discharging switch 3 and filter preventing clogging up device 4 and be placed in respectively drip washing groove 2 right sides and bottom is respectively applied to the drip washing to pollutant, the pollutant after drip washing processed discharges, prevents that silt from stopping up the ring waste floss hole; Waste liquid sample tap 5 is placed on the pipeline between drip washing groove 2 and the ring waste process tank 6, is used for monitoring waste liquor contamination thing content; Arsenic adsorbent equipment 7 is used for the purified treatment ring waste, and arsenic adsorbent material is replaced switch 8 and is used for changing arsenic adsorbent material, lays respectively at ring waste process tank 6 inside and the outside; Drip washing filtrate holding vessel 9 is used for collecting the solvent through after 7 processing of arsenic adsorbent equipment, between the first electrodynamic pump 11 and ring waste process tank 6; The first liquid level gauge 10 is used for monitoring the volume of drip washing filtrate in the drip washing filtrate holding vessel 9, is positioned at the inside of drip washing filtrate holding vessel 9; The first electrodynamic pump 11 is used for pumping reagent, between eluent hold-up tank 12 and drip washing filtrate holding vessel 9; Described level meter 15 is installed in the dry powder hopper 12, is used for low alarm; The motor 14 that feeds intake is used for adding solid pharmaceutical preparation to eluent hold-up tank 12, is positioned at eluent hold-up tank 12 tops; The first magnetic valve 16 and running water inlet pipeline 17 is used for adding entry and liquid preparation to eluent hold-up tank 12, both is connected with eluent hold-up tank 12 and is positioned at its top; Agitating device 18 is used for making eluent to mix, and is fixed on eluent hold-up tank 12 inside; The second liquid level gauge 19 and solution concentration verifying attachment 20 are used for monitoring and regulating volume and the concentration of eluent in the hold-up tank, all are placed in eluent hold-up tank 12 inside; The second magnetic valve 21, the second electrodynamic pump 22 and flowmeter 23 are used for controlling and are delivered to flow velocity and the consumption that sprays eluent in the device 1, and the three is equipped in to connect and sprays on the eluent conveyance conduit 24 of device 1 and eluent hold-up tank 12; Touch screen operating 26 on the electrical control cubicles 28 is used for the operation of all facilities of control, and the signal of telecommunication that the first liquid level gauge 10, the first electrodynamic pump 11, the motor 14 that feeds intake, level meter 15, the first magnetic valve 16, agitating device 18, the second liquid level gauge 19, solution concentration verifying attachment 20, the second magnetic valve 21, the second electrodynamic pump 22, flowmeter 23 are connected with alarm all compiles connection at electrical control cubicles 28 places; Alarm 25 and master switch 27 carry out early warning and control general supply to the quantity of eluent and material respectively, and both are positioned at electrical control cubicles 28 tops and the outside.
As shown in Figure 1, the present invention repair As polluted soil/and the concrete grammar of discarded object (mine tailings, bed mud) be: the potassium dihydrogen phosphate solid pharmaceutical preparation is added in the dry powder hopper 13, will be no less than 5m 3The arsenic contamination thing is loaded into drip washing groove 2, filling arsenic adsorbent equipment 7 in ring waste process tank 6, utilize on the electrical control cubicles 28 touch screen operating 26, after setting needed relevant parameter, start automatically operation, the first magnetic valve 16 is opened automatically into water, feed intake motor 14 and agitating device 18 starts automatically, begin to configure the drip washing preparation, after the liquid in the eluent hold-up tank 12 is in low level, simultaneously, liquid in the drip washing filtrate holding vessel 9 is in a high position, the first electrodynamic pump 11 brings into operation the reagent in the drip washing filtrate holding vessel 9 is pumped in the eluent hold-up tank 12, simultaneity factor can be opened 16 water inlets of the first magnetic valve automatically, and start feed intake motor 14 and agitating device 18, begin batching, when treating that liquid level in the eluent hold-up tank 12 is in a high position and reaches default concentration, the second magnetic valve 21 and the second electrodynamic pump 22 start simultaneously, by eluent conveyance conduit 23 filling drip washing reagent in the drip washing groove 2, monitor by 5 pairs of drip washing effects of waste liquid sample tap, concentration reaches preset value and namely stops drip washing in waste liquid, battery main switch 27 autoshutdowns, discharging switch 3 is opened, pollutant after drip washing is derived, load new pollutant, restart above-mentioned flow process.
As shown in Figure 1, the button control panel for touch screen operating 26 of the present invention comprises: system begins, system stops, helping explanation, printing, parameter setting, chain setting, Lookup protocol; The software operation flow process as shown in Figure 2, control panel START button on the point touching screen operating system, select manual or automatic mode, whether the first liquid level gauge 10 indication high-position, if "No", then feed intake motor 14 and the first magnetic valve 16 starts operation preparation eluent simultaneously, if "Yes", then the first electrodynamic pump 11, feed intake motor 14 and the first magnetic valve 16 moves together and jointly prepare eluent; Whether the second liquid level gauge 19 reaches a default high position and concentration, if "Yes", then the pumping eluent sprays processing, if "No" is then proceeded the preparation of eluent; Can not arrive preset value if spray the waste liquid of processing generation, then proceed to spray processing, if can reach preset value, then master switch 27 cuts out, and drip washing is finished; Spraying the ring waste of processing generation leaves in the drip washing filtrate holding vessel 9 after ring waste process tank 6 purifies, then be pumped to the preparation of carrying out eluent in the eluent hold-up tank 12 when the first liquid level gauge 10 arrives indication high-positions, reach the automatic recovery and preparation eluent, automatically carry out the effect of drip washing operation.
In addition, touch screen operating 26 among the present invention can also be connected to by wireless network the DCS control system of computer, record flow of inlet water, solid pharmaceutical preparation addition, liquid output flow, time related information in the whole lessivation by the data sheet in the DCS system, play the effect of monitoring and statistics.
The present invention is described in detail below in conjunction with concrete reparation example.
1, arsenic contamination sand loam soil example is repaired in drip washing
Connect power supply, running water inlet channel 17, eluent output pipe 24 etc. are opened touch screen operating 26, and the selection preparation type is solid, and selecting the method for operation is automatically operation, and solid pharmaceutical preparation automatic feeding mass ratio is 10%.The potassium dihydrogen phosphate solid pharmaceutical preparation is added in the dry powder hopper 13, be no less than 5m 3The arsenic contamination thing is loaded into drip washing groove 2, filling arsenic adsorbent equipment 7 in ring waste process tank 6, utilize the touch screen operating 26 on the electrical control cubicles 28, after setting needed relevant parameter, start automatically operation, the first magnetic valve 16 is opened automatically into water, feed intake motor 14 and agitating device 18 starts automatically, begin to configure the drip washing preparation, liquid in eluent hold-up tank 12 is in low level, simultaneously, liquid in the drip washing filtrate holding vessel 9 is in a high position, the first electrodynamic pump 10 brings into operation the reagent in the drip washing filtrate holding vessel 9 is pumped in the eluent hold-up tank 12, simultaneity factor can be opened 16 water inlets of the first magnetic valve automatically, and start feed intake motor 14 and agitating device 18, begin batching, when treating that liquid level in the eluent hold-up tank 12 is in a high position and reaches default concentration, the second magnetic valve 21 and the second electrodynamic pump 22 start simultaneously, by eluent conveyance conduit 24 filling drip washing reagent in the drip washing groove 2, monitor by 5 pairs of drip washing effects of waste liquid sample tap, concentration reaches preset value and namely stops drip washing in waste liquid, battery main switch 27 autoshutdowns are opened discharging switch 3, and the pollutant after drip washing is derived, load new pollutant, restart above-mentioned flow process.Each drip washing time is 1h, the every processing of arsenic adsorbent material 100m 3Waste liquid is changed once, and As polluted soil, mine tailings and bed mud need consume respectively 10m 3, 8m 3, 9m 3Drip washing reagent, just can significantly reduce the arsenic concentration in the pollutant.
Arsenic in soil change in concentration and clearance before and after table 1 drip washing prosthetic device is processed
As shown in Table 1, the original arsenic concentration of Polluted Soil is about 120mg/kg, and after processing through drip washing, Arsenic in Soil concentration obviously reduces, and the maximum material removal rate of its arsenic can arrive 72.3%, shows that chemical leaching is processed can effectively repair As polluted soil.
2, except the arsenic adsorbent material screening experiment:
Its step comprises:
(1) experiment process: be ready to various materials, get internal diameter 3.4cm, the circular PVC plastic tube of high 21cm, the quartz sand of 2 cm thicks of packing into is wrapped up with 100 order filter screens at the pipe end again, and is with hasp strap that the filter screen envelope is tight at last.Measure respectively 46 cubic centimetres of purity greater than 99% di-iron trioxide and active carbon with graduated cylinder, both mixings are packed in the pipe, be densified to and highly be 10cm.Arsenic adsorbent material surface coverage one deck filter paper is in case spill.PVC is fixedly rested on the experimental bench, and the conical flask collection leachate that a funnel (filter paper is placed in the funnel the inside) is positioned over 250mL is overlapped in the bottom.Compound concentration is 8%KH 2PO 4, Na 3AsO 412H 2O(concentration: 37mg/kg purity: 49-52%) solution is total to 1L, each sample carries out drip washing with the 150mL leacheate to arsenic adsorbent material, the height of leacheate exceeds arsenic adsorbent material top layer 3~5cm within whole lessivation keeps post, the speed of drip washing is controlled at 10mL/min, begin to finishing to use manual time-keeping from drip washing, altogether drip washing is 1 time, collects respectively leacheate, and that sealing is preserved is to be measured (before the examination with computer with 0.45 μ m filtering with microporous membrane).
(2) analytical instrument: the heavy metal As in the leacheate adopts with AFS (AFS9130) analysis and measures.Phosphorus in the leacheate adopts the molybdenum blue colorimetric method analysis to measure.The pH value of leacheate is measured with the potentiometry analysis.
The arsenic concentration of table 2 arsenic adsorbent material laboratory experiment ring waste changes and clearance
As can be seen from Table 2, arsenic removal rate surpassed 90% the mixture that di-iron trioxide, di-iron trioxide and active carbon are arranged, this shows that di-iron trioxide, active carbon and di-iron trioxide volume are that 1 to 1 mixture is best to the arsenic removal effect, both can both reach 100% to the clearance of arsenic, and other materials also has certain effect to removing arsenic.
In a word, the present invention need just can directly not carry out drip washing through pre-treatment to As polluted soil and discarded object (mine tailings, bed mud), and the method also can be applied to original place dystopy drip washing and repair other pollutants; The arsenic adsorbent equipment is fairly obvious to the treatment effect that contains the arsenic ring waste, and easily obtain, with low cost; Package unit is reasonable in design, and is simple to operate, and treatment effeciency is high, and cost is little, and energy consumption is low, and the secondary pollution risk is low, realizes zero-emission and energy-conservation, efficient, safety, environmental protection.Therefore, the present invention repairs As polluted soil and discarded object (mine tailings, bed mud) for drip washing, realizes containing arsenic waste solution cycle for the treatment of recycling, has initiative important meaning.
The non-elaborated part of the present invention belongs to techniques well known.
The above; only be the part specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any those skilled in the art are in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.

Claims (7)

1. the drip washing prosthetic device of an As polluted soil and discarded object is characterized in that comprising: spray device (1), drip washing groove (2), discharging switch (3), filter preventing clogging up device (4), waste liquid sample tap (5), ring waste process tank (6), arsenic adsorbent equipment (7), arsenic adsorbent material is replaced switch (8), drip washing filtrate holding vessel (9), the first liquid level gauge (10), the first electrodynamic pump (11), eluent hold-up tank (12), dry powder hopper (13), motor (14) feeds intake, level meter (15), the first magnetic valve (16), running water inlet channel (17), agitating device (18), the second liquid level gauge (19), solution concentration verifying attachment (20), the second magnetic valve (21), the second electrodynamic pump (22), flowmeter (23), eluent conveyance conduit (24), alarm (25), touch screen operating (26), master switch (27), electrical control cubicles (28); The described device (1) that sprays is connected with eluent conveyance conduit (24), be used for the drip washing pollutant, be positioned at the top of drip washing groove (2), discharging switch (3) and filtration preventing clogging up device (4) are placed in respectively drip washing groove (2) right side and bottom, and its effect is respectively to be processed drip washing the discharge of after stain thing, prevent that silt from stopping up the ring waste floss hole; Waste liquid sample tap (5) is placed on the pipeline between drip washing groove (2) and the ring waste process tank (6), is used for monitoring waste liquor contamination thing content; Arsenic adsorbent equipment (7) is used for the purified treatment ring waste, and arsenic adsorbent material is replaced switch (8) and is used for changing sorbing material, lays respectively at ring waste process tank (6) inside and the outside; Drip washing filtrate holding vessel (9) is used for collecting the solvent through after arsenic adsorbent equipment (7) processing, is positioned between the first electrodynamic pump (11) and the ring waste process tank (6); The first liquid level gauge (10) is used for monitoring the volume of drip washing filtrate in the drip washing filtrate holding vessel (9), is positioned at the inside of drip washing filtrate holding vessel (9); The first electrodynamic pump (11) is used for pumping reagent, is positioned between eluent hold-up tank (12) and the drip washing filtrate holding vessel (9); Described level meter (15) is installed in the dry powder hopper (12), is used for low alarm; The motor (14) that feeds intake is used for adding solid pharmaceutical preparation to eluent hold-up tank (12), is positioned at eluent hold-up tank (12) top; The first magnetic valve (16) and running water inlet pipeline (17) are used for adding entry and liquid preparation to eluent hold-up tank (12), both are connected with eluent hold-up tank (12) and are positioned at its top; Agitating device (18) is used for making eluent to mix, and is fixed on eluent hold-up tank (12) inside; Volume and concentration that the second liquid level gauge (19) and solution concentration verifying attachment (20) are used for monitoring and regulating eluent in the hold-up tank all are placed in eluent hold-up tank (12) inside; The second magnetic valve (21), the second electrodynamic pump (22) and flowmeter (23) are used for controlling and are delivered to flow velocity and the consumption that sprays eluent in the device (1), and the three is equipped in to connect and sprays on the eluent conveyance conduit (24) of device (1) and eluent hold-up tank (12); Touch screen operating (26) on the electrical control cubicles (28) is used for the operation of all facilities of control, and the first liquid level gauge (10), the first electrodynamic pump (11), the motor that feeds intake (14), level meter (15), the first magnetic valve (16), agitating device (18), the second liquid level gauge (19), solution concentration verifying attachment (20), the second magnetic valve (21), the second electrodynamic pump (22), flowmeter (23) are connected 25 with alarm) the signal of telecommunication all locate to compile connection in electrical control cubicles (28); Alarm (25) and master switch (27) carry out early warning and control general supply to the quantity of eluent and material respectively, and both are positioned at electrical control cubicles (28) top and the outside.
2. the drip washing prosthetic device of As polluted soil according to claim 1 and discarded object, it is characterized in that: the formation of described arsenic adsorbent equipment (7) is: two-layer up and down is punching PVC plate, two-layer geotextiles between punching PVC plate, fill out between geotextiles and put arsenic adsorbent material, bottommost is that the punching corrosion resistant plate is as support.
3. the drip washing prosthetic device of As polluted soil according to claim 2 and discarded object is characterized in that: described arsenic adsorbent material is made of according to identical quality proportioning with active carbon greater than 99% di-iron trioxide purity.
4. the drip washing prosthetic device of As polluted soil according to claim 1 and discarded object, it is characterized in that: select manual operation or automatically operation by described touch screen operating (26), also can select to prepare solid pharmaceutical preparation or liquid preparation or reclaim reagent, and arrange and to add the ratio relevant parameter, and show instant eluent concentration, volume, flow parameter.
5. according to claim 1 or the drip washing prosthetic device of 4 described As polluted soils and discarded object, it is characterized in that: described touch screen operating (26) is connected to the DCS control system of computer by wireless network, record flow of inlet water, solid pharmaceutical preparation addition, liquid output flow, time related information in the whole lessivation by the data sheet in the DCS system, play the effect of monitoring and statistics.
6. the drip washing prosthetic device of As polluted soil according to claim 1 and discarded object is characterized in that: when material was positioned at low level in the described dry powder hopper (13), alarm (25) can give the alarm, and reminded the operator to add materials; When liquid is positioned at low liquid level in the eluent hold-up tank (12), alarm (25) also can give the alarm, simultaneously, the second magnetic valve (21) cuts out, the second electrodynamic pump (22) stops to spraying pumping eluent in the device (1), liquid in the drip washing filtrate holding vessel (9) is in a high position, the first electrodynamic pump (11) brings into operation the reagent in the drip washing filtrate holding vessel (9) is pumped in the eluent hold-up tank (12), simultaneity factor can be opened the first magnetic valve (16) water inlet automatically, and start feed intake motor (14) and agitating device (18), begin batching, when treating that liquid level in the eluent hold-up tank (12) is in a high position and reaches default concentration, the second magnetic valve (21) is opened, and the second electrodynamic pump (22) restarts.
7. utilize the described device of claim 1 to repair the restorative procedure of arsenic contamination thing, it is characterized in that being achieved as follows: the potassium dihydrogen phosphate solid pharmaceutical preparation is added in the dry powder hopper (13), will be no less than 5m 3The arsenic contamination thing is loaded into drip washing groove (2), filling arsenic adsorbent equipment (7) in ring waste process tank (6), utilize the touch screen operating (26) of (28) on the electrical control cubicles, after setting needed relevant parameter, start automatically operation, the first magnetic valve (16) is opened automatically into water, the automatically startup of motor (14) and agitating device (18) feeds intake, begin to configure the drip washing preparation, liquid in eluent hold-up tank (12) is in low level, simultaneously, liquid in the drip washing filtrate holding vessel (9) is in a high position, the first electrodynamic pump (11) brings into operation the reagent in the drip washing filtrate holding vessel (9) is pumped in the eluent hold-up tank (12), simultaneity factor can be opened the first magnetic valve (16) water inlet automatically, and start feed intake motor (14) and agitating device (18), begin batching, when treating that liquid level in the eluent hold-up tank (12) is in a high position and reaches default concentration, the second magnetic valve (21) and the second electrodynamic pump (22) start simultaneously, by eluent conveyance conduit (23) filling drip washing reagent in the drip washing groove (2), by waste liquid sample tap (5) the drip washing effect is monitored, concentration reaches preset value and namely stops drip washing in waste liquid, battery main switch (27) autoshutdown, discharging switch (3) is opened, pollutant after drip washing is derived, load new pollutant, restart above-mentioned flow process.
CN 201210563898 2012-12-21 2012-12-21 Elution repairing device and repairing method of arsenic polluted soil and wastes CN102974607B (en)

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