CN205289229U - Chromium sediment and wet process of polluting soil processing apparatus that detoxifies thereof - Google Patents
Chromium sediment and wet process of polluting soil processing apparatus that detoxifies thereof Download PDFInfo
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- CN205289229U CN205289229U CN201521041035.6U CN201521041035U CN205289229U CN 205289229 U CN205289229 U CN 205289229U CN 201521041035 U CN201521041035 U CN 201521041035U CN 205289229 U CN205289229 U CN 205289229U
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- 238000000034 method Methods 0.000 title claims abstract description 86
- 239000011651 chromium Substances 0.000 title claims abstract description 56
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 53
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- 241001602688 Pama Species 0.000 description 2
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- 229910000831 Steel Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
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- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The utility model discloses a chromium sediment and wet process of polluting soil processing apparatus that detoxifies thereof, this processing apparatus is including screening broken system, wet process detoxify system, dewatering system and water seepage collecting system. In sieving broken system, chromium sediment and pollution soil are carried to the shale shaker through conveyor belt by the feeding funnel, the screening is after carried to the breaker by band conveyer, via the breaker with the chromium sediment and pollute that soil is broken to be carried to certain particle diameter after to the wet process system of detoxifying, , the wet process adds the medicament that detoxifies in detoxifying the system, treat intensive mixing reaction back completely, add the flocculating agent, carry to the dewatering system by the submerged pump, this dewatering system adopts geotechnique's pipe bag, process dewatering system dehydration back is persisted in the geotechnique manages the bag above 99% solid particle, water seepage retrieval and utilization to wet process after collecting system of detoxifying. The utility model discloses a to chromium sediment and wet process of polluting soil processing apparatus that detoxifies thereof, it is good to have the operational effect, no secondary pollution, the characteristics of waste water zero release.
Description
Technical field
This utility model is that a kind of wet method detoxifcation about field of environment protection processes device, particularly relates to a kind of wet method detoxifcation for chromium slag and contaminated soil thereof and processes device.
Background technology
Chromium slag is the poisonous waste residue produced in chromium salt production process, and harmful substance therein is mainly solubility Cr VI. Cr VI is easily absorbed by the body and has strong oxidizing property, biomolecule can be made to sustain damage by oxidative biological molecule (DNA, RNA, protein, enzyme) on the one hand; Another aspect is in chromic process at hexavalent chrome reduction, and cell has zest and corrosivity, causes that dermatitis and ulcer occur. Can scatter with the wind containing chromium powder dirt, pollute ambient atmosphere and farmland; Chromium slag and contaminated soil thereof are by rainwater drip washing, cause and ooze under high concentration chrome wastewater overflow, pollution in various degree is caused in subsoil water, river and marine site etc., endangers various biology, the all diseases causing animal dead, the agricultural underproduction and human body occur, such as blood chromium, urine chromium and various cancers etc. If so chromium slag and contaminated soil thereof are administered without effective ways removing toxic substances and stacked meeting serious environment pollution for a long time, being detrimental to health.
Current chromium residue detoxifying mainly has two kinds of techniques of dry and wet. The removing toxic substances of dry method roasting reduction is roasting under high-temperature reductibility atmosphere, hexavalent chrome reduction becomes trivalent chromium and is present in vitreous body to reach the purpose of removing toxic substances. Wet method detoxifcation is that acid-soluble and water miscible Cr VI is reduced into trivalent chromium under the effect of reducing agent by after thin for chromium sizing alkaline hydrolysis. Dry detoxified relatively costly and easily cause secondary pollution, wet method detoxifcation can produce a large amount of waste liquid, and the waste residue moisture content after removing toxic substances is higher, affects the further recycling of waste residue. Existing chromium residue detoxifying method is relatively complicated and does not have special commercial chromium residue detoxifying equipment.
Utility model content
In view of this, main purpose of the present utility model is in that the wet method detoxifcation providing a kind of chromium slag and contaminated soil thereof processes device.
For reaching above-mentioned purpose, this utility model provides the wet method detoxifcation of a kind of chromium slag and contaminated soil thereof to process device, including:
Sieving approach system, for chromium slag and contaminated soil thereof being sieved and be broken into permission charging particle diameter, and is delivered to wet method detoxifcation system;
Wet method detoxifcation system, adds removing toxic substances medicament in this wet method detoxifcation system, for by screening and broken after chromium slag and contaminated soil and medicament react and detoxified;
Dewatering system, for carrying out processed by intrasystem for wet method detoxifcation mixed serum;
Ooze out water collection system, be collected for the water that dewatering system is oozed out and the water of collection is delivered to described wet method detoxifcation system.
Described sieving approach system includes elevating hopper, vibrosieve and disintegrating machine, the first belt conveyor it is connected between this elevating hopper with vibrosieve, the second belt conveyor it is connected between this vibrosieve with disintegrating machine, this disintegrating machine is connected with described wet method detoxifcation system by the 3rd belt conveyor, chromium slag and contaminated soil thereof in described elevating hopper deliver to vibrosieve via the first belt conveyor, after bolting allows charging particle diameter to disintegrating machine, it is delivered to disintegrating machine via described second belt conveyor, chromium slag and contaminated soil thereof are delivered to wet method detoxifcation system then through by the 3rd belt conveyor after crusher in crushing.
Described wet method detoxifcation system includes reaction tank, stirring motor, support, described stirring motor is arranged on the center of described reaction tank by support, removing toxic substances medicament is added in described reaction tank, the chromium slag carried from described sieving approach system and contaminated soil thereof are sufficiently mixed reaction with medicament under the stirring action of stirring motor, detoxified, in described reaction tank hybrid reaction completely after mixed liquor slurry be delivered to described dewatering system.
Described dewatering system includes submerged pump, feed-line, dehydration groove and the geotextile tube bag being located in dehydration groove, this submerged pump is for being pumped in geotextile tube bag via this feed-line carry out dehydration by the mixed serum after hybrid reaction in described wet method detoxifcation system, and the water oozed out in described geotextile tube bag oozes out water collection system described in the entrance of described dehydration groove.
The described water collection system that oozes out includes collecting pit, immersible pump, feed-line, this immersible pump is located in collecting pit, this feed-line one end is positioned at this collecting pit, the other end connects described wet method detoxifcation system, this collecting pit is for collecting the water seepage of described dewatering system, and water seepage is delivered to described wet method detoxifcation system reuse by the immersible pump in collecting pit by this feed-line after collecting.
This utility model has the advantage that (1) this plant automation degree is high, and reduction effect is good, and its leaching concentration of Cr VI after this device detoxifies can reach below 0.5mg/L; (2) this device dewatering system adopts geotextile tube bag, dewatering efficiency is higher than traditional filter press, after geotextile tube bag dehydration, the solid particle more than 99% is remained in geotextile tube bag, and waste residue and contaminated soil moisture content thereof after removing toxic substances are relatively low, it is simple to follow-up recycling; (3) transudate of geotextile tube bag uses wet method detoxifcation system through collecting Posterior circle, it is achieved Zero discharge.
Accompanying drawing explanation
Fig. 1 is the structural principle block diagram of the wet method detoxifcation process device of the chromium slag contaminated soil of this utility model;
Fig. 2 is the enforcement view of the wet method detoxifcation process device of the chromium slag contaminated soil of this utility model;
Fig. 3 is the process chart that in this utility model, chromium slag contaminated soil wet method detoxifcation processing method carries out wet method detoxifcation.
Detailed description of the invention
For ease of structure of the present utility model and the effect that reaches are had further understanding, describe in detail as follows in conjunction with the accompanying drawing preferred embodiment that develops simultaneously.
As shown in Figure 1, the wet method detoxifcation of chromium slag contaminated soil of the present utility model processes sieving approach system, wet method detoxifcation system, dewatering system that device includes being sequentially connected by pipeline and oozes out water collection system, and this oozes out water collection system and is connected to wet method detoxifcation system by feed-line. This sieving approach system is for sieving chromium slag and contaminated soil thereof and be broken into permission charging particle diameter, this wet method detoxifcation system for by screening and broken after chromium slag and contaminated soil and medicament react and detoxified, this dewatering system is for carrying out processed by intrasystem for wet method detoxifcation mixed serum, and this oozes out the water that dewatering system oozes out by water collection system and is collected and by feed-line, the water of collection is delivered to wet method detoxifcation system.
Shown in Fig. 2, sieving approach system in this utility model includes elevating hopper 1, vibrosieve 3 and disintegrating machine 5, the first belt conveyor 2 it is connected between this elevating hopper 1 with vibrosieve 3, the second belt conveyor 4 it is connected between this vibrosieve 3 with disintegrating machine 5, this sieving approach system can according to subsequent treatment standard, the disintegrating machine 5 of differently configured ability, is crushed to different-grain diameter. Send into the chromium slag in elevating hopper 1 and contaminated soil delivers to vibrosieve 3 via the first belt conveyor 2, vibrosieve 3 is sized to after disintegrating machine 5 allows charging particle diameter, it is delivered to disintegrating machine 5, chromium slag and contaminated soil thereof via the second belt conveyor 4 and is delivered to wet method detoxifcation system then through by the 3rd belt conveyor 6 after disintegrating machine 5 is broken.
Wherein elevating hopper 1 can select size flexibly according to the quantity processing chromium slag and contaminated soil thereof day; Belt conveyor adopts motorized pulleys transmission, the technical parameter such as belt speed, bandwidth, fed distance, conveying capacity, angle of inclination, material characteristic, stocking angle, use length and hoisting depth, all can select according to practical situation. Vibrosieve 3 adopts new high-efficiency circular shale shaker. Circular shale shaker adopts barrel-type eccentric shaft vibration exciter and inclined block adjusting amplitude, and screening specification is many, and structure is reliable, exciting force is strong, screening efficiency is high, vibrating noise is little. Circular shale shaker is mainly made up of screen box, screen cloth, vibrator, shock-absorbing spring device, underframe etc. Vibrator is on sieve box side plate, and is rotated by shaft coupling by motor, produces centrifugal intertia force, forces screen box to vibrate. Screen cloth sieves requirement according to chromium slag and contaminated soil thereof, can adopt potassium steel woven screen, punching sieve plate and rubber sieve plate, and the adjustment of screen angle can be realized by change spring fastening position height. Disintegrating machine 5 is made up of parts such as frame, rotor, tup, liner plate, charging aperture, discharging openings, motor rotates rotor driven by V belt, make to be fixed on rotor upper ram to run up, material is made fully to clash into tup and interior lining panel, thus the material in crusher chamber is crushed, and gap between tup and counterpunch board is adjustable, can meet and multiple surmise condition. Disintegrating machine 5 can select the disintegrating machine of different model and classification according to feedstock characteristic and broken particle diameter.
Wet method detoxifcation system in this utility model includes reaction tank 7, stirring motor 8, support 9.Reaction tank 7 can adopt the reaction tank of concrete reaction tank or acid-alkali-corrosive-resisting according to actual requirement of engineering, the selection of this reaction tank 7 size should match with needing the chromium quantity of slag to be processed every day, the selection of stirring motor 8 rotating speed power is wanted to make whole response system obtain uniform stirring, support 9 is used for fixing stirring motor, and stirring motor 8 is arranged on the center of reaction tank 7 by support 9. Acid-alkali-corrosive-resisting is wanted in the selection of above material. Adding removing toxic substances medicament in reaction tank 7, chromium slag and contaminated soil thereof are sufficiently mixed with medicament under the stirring action of stirring motor 8, it is ensured that react completely fully, detoxified. After being sufficiently mixed and reacting completely, add flocculant, after stirring, be delivered to dewatering system. Wherein the 3rd belt conveyor 6 in sieving approach system is connected to reaction tank 7.
Dewatering system in this utility model includes submerged pump 10, feed-line 11, geotextile tube bag 12 and dehydration groove 13. This submerged pump 10 is located in reaction tank 7, this feed-line 11 one end is located in reaction tank 7, the other end is located at geotextile tube bag 12, and this submerged pump 10 for being pumped to the geotextile tube bag 12 in dehydration groove 13 by the mixed serum in wet method detoxifcation system response pond 7 via feed-line 11. Geotextile tube bag 12 is a kind of tubulose soil engineering bag with filtration by high intensity permeability geotextile materials (such as polypropylene yarn) braiding, the volume of geotextile tube bag 12 can regulate according to overall dimensions, its diameter can be varied as desired in, length is maximum reaches 200m, has significantly high intensity, strainability and long-term anti-ultraviolet property. Geotextile tube bag 12 dehydration is divided into filling, dehydration and consolidation three phases. Filling is that intrasystem for wet method detoxifcation serosity is pumped in geotextile tube bag 12, before being pumped to geotextile tube bag 12, adds flocculant, promotes solid particle unity, in order to better dehydration in reaction tank 7. Dehydration refers to that current are discharged from geotextile tube bag 12, and in filtration that its principle has mainly by geotextile tube bag 12 material and bag, fluid pressure promotes geotextile tube bag 12 dehydration, and after dehydration, the solid particle more than 99% is remained in geotextile tube bag 12; Water seepage can be collected and again recycle in wet method detoxifcation system. Consolidation is delivered to landfill yard geotextile tube bag 12 and implant thereof or is removed by consolidation thing, and carrying out recycling in appropriate circumstances after referring to that the solid particle remained in geotextile tube bag 12 fills up. Dehydration groove 13 is mainly used for depositing the cement tub of geotextile tube bag 12, it is prevented that the water seepage of geotextile tube bag 12 is arbitrarily wandering and oozes out water collection system for connection.
The water collection system that oozes out in this utility model includes collecting pit 14, immersible pump 15, feed-line 16. This immersible pump 15 is located in collecting pit 14, and this feed-line 16 one end is positioned at this collecting pit 14, and the other end is positioned at this reaction tank 7. This collecting pit 14 is mainly used in collecting the water seepage of geotextile tube bag 12, and water seepage is delivered to wet method detoxifcation system reuse by the immersible pump 15 in collecting pit 14 by feed-line 16 after collecting, it is achieved the zero-emission of waste water. Collecting pit 14 is according to place practical situation, it is possible to take dig pit the form laying antiseepage film or select the container that can take up liquid. Feed-line 16 can adopt the materials such as rubber tube, fire-fighting water bag, plastic tube.
Below in conjunction with accompanying drawing and concrete a certain embodiment, this utility model is further described:
With reference to, shown in Fig. 3, producing in the chemical plant of chromic salts in Shandong, put region at former chromium slag muck and take dregs aggregate sample for this device experiment.Sample detection result is as follows:
Table 1-1 test specimen content of 6-valence Cr ions
| Soil types | Content of 6-valence Cr ions (mg/kg) | Cr VI leaching concentration (mg/L) |
| Dregs mixture | 677.78 | 61 |
Process step is as follows:
1) sieving approach: after the contaminated soil containing chromium slag is loaded elevating hopper 1 by excavator, warp is by the first belt conveyor 2, deliver to vibrosieve 3 to sieve, this vibrosieve 3 adopts two grades of screenings, above one layer of mesh size be 8cm, below one layer of mesh size be 5mm. The particle diameter rock particles more than 8cm is removed by vibrosieve 3 one layer of screen cloth above, below one layer of screen cloth the particle diameter granule more than 5mm is sifted out, it is broken that the granule between 5mm-8cm is delivered to disintegrating machine 5 via the second belt conveyor 4. Granule less than 5mm, without entering disintegrating machine 5, is sent directly into wet method detoxifcation system response pond 7. Disintegrating machine 5 adopts column composite crusher, and the advantage having E Shi and hammer concurrently, discharging-material size is between 0.5-5mm. It is delivered to wet method detoxifcation system response pond 7 then through by the 3rd belt conveyor 6 after dregs mixture after sieving approach.
2) wet method detoxifcation: this wet method detoxifcation system includes reaction tank 7, stirring motor 8, support 9. 4 �� 4 �� 2m is adopted according to place situation reaction tank 73Concrete reaction tank, support 9 is erected at reaction tank 7 centre position for fixing stirring motor 8, and stirring motor 8 adopts the stirring motor of power 7.5KW, rotating speed 48r/min. Puddler diameter is 160mm, and agitator arm diameter is 2000mm, and stirring pole length is 1500mm, and stirring paddle material is 304 rustless steels. Wet method detoxifcation step is as follows: every batch adds 5m3Dregs mixture enters 4 �� 4 �� 2m3Reaction tank 7, is subsequently adding 10m3Water and 0.5m320% dilute sulfuric acid mix and blend 20min, continuously add after reducing agent (such as 0.9t ferrous sulfate) stirs 30min, continuously add a certain amount of stabilizer (such as calcium oxide), then adding a certain amount of flocculant (such as PAMA (PAM)) after stirring 20min, after stirring 20min, direct submerged pump squeezes into geotextile tube bag dehydration.
3) geotextile tube bag dehydration: geotextile tube bag 12 adopts by the cylindrical pipe bag of polypropylene yarn braiding, pipe range 40m, wide 3m, for convenience of geotextile tube bag 12 dehydration, builds the dehydration groove 13 of concrete hardening in watering area, the long 45m of dehydration groove 13, wide 6m, high 0.3m, geotextile tube bag 12 is placed in dehydration in dehydration groove 13, dehydration is as follows: the first step is filling, adopts submerged pump 10 and feed-line 11 to be fills up in geotextile tube bag 12 by the mixed serum in reaction tank 7; Second step is draining, by the said minuscule hole of the geotextile constituting geotextile tube bag 12, retains the solids in mud, discharges the moisture in mud, and bag is repeated filling, until filling up to bag; 3rd step is consolidation, and after repeated filling and draining, the particle object stayed in geotextile tube bag 12 can consolidate gradually due to desiccation. After approximately passing through two weeks, in bag, particulate matter just can consolidate.
4) water seepage is collected: oozes out water collection system and is mainly made up of collecting pit 14, immersible pump 15 and feed-line 16. Collecting pit 14, according to place practical situation, is taked to dig pit and is laid the form of antiseepage film, and the long 6m of collecting pit, wide 2m, high 0.5m, feed-line 16 adopts rubber tube. Specifically comprise the following steps that the water seepage of geotextile tube bag 12 is after collecting pit 14 is collected, and is delivered to reaction tank 7 reuse by immersible pump 15 by feed-line 16, it is achieved wastewater zero discharge.
For assessing this device wet method detoxifcation effect, taking sample in geotextile tube bag 12 and send third party test in laboratory, in empirical tests sample, the Cr VI total amount of residual is less than 5mg/kg, and leaching value is less than 0.5mg/L. Taking liquid in collecting pit to detect, empirical tests Cr VI does not detect, and can be back to wet method detoxifcation system completely.
This utility model has the advantage that (1) this plant automation degree is high, and reduction effect is good, and its leaching concentration of Cr VI after this device detoxifies can reach below 0.5mg/L; (2) this device dewatering system adopts geotextile tube bag, dewatering efficiency is higher than traditional filter press, after geotextile tube bag dehydration, the solid particle more than 99% is remained in geotextile tube bag, and waste residue and contaminated soil moisture content thereof after removing toxic substances are relatively low, it is simple to follow-up recycling; (3) transudate of geotextile tube bag uses wet method detoxifcation system through collecting Posterior circle, it is achieved Zero discharge.
Embodiment described in the utility model is only for illustrating and noting limit this utility model; under this utility model enlightens and without departing from the accommodation of made other forms of the situation in the claimed scope of this utility model, all within this utility model protection domain.
Claims (5)
1. the wet method detoxifcation of a chromium slag and contaminated soil thereof processes device, it is characterised in that including: sieving approach system, for chromium slag and contaminated soil thereof being sieved and be broken into permission charging particle diameter, and is delivered to wet method detoxifcation system;
Wet method detoxifcation system, adds removing toxic substances medicament in this wet method detoxifcation system, for by screening and broken after chromium slag and contaminated soil and medicament react and detoxified;
Dewatering system, for carrying out processed by intrasystem for wet method detoxifcation mixed serum;
Ooze out water collection system, be collected for the water that dewatering system is oozed out and the water of collection is delivered to described wet method detoxifcation system.
2. the wet method detoxifcation of chromium slag as claimed in claim 1 and contaminated soil thereof processes device, it is characterized in that, described sieving approach system includes elevating hopper, vibrosieve and disintegrating machine, the first belt conveyor it is connected between this elevating hopper with vibrosieve, the second belt conveyor it is connected between this vibrosieve with disintegrating machine, this disintegrating machine is connected with described wet method detoxifcation system by the 3rd belt conveyor, chromium slag and contaminated soil thereof in described elevating hopper deliver to vibrosieve via the first belt conveyor, after bolting allows charging particle diameter to disintegrating machine, it is delivered to disintegrating machine via described second belt conveyor, chromium slag and contaminated soil thereof are delivered to wet method detoxifcation system then through by the 3rd belt conveyor after crusher in crushing.
3. the wet method detoxifcation of chromium slag as claimed in claim 1 and contaminated soil thereof processes device, it is characterized in that, described wet method detoxifcation system includes reaction tank, stirring motor, support, described stirring motor is arranged on the center of described reaction tank by support, removing toxic substances medicament is added in described reaction tank, the chromium slag carried from described sieving approach system and contaminated soil thereof are sufficiently mixed reaction with medicament under the stirring action of stirring motor, detoxified, in described reaction tank hybrid reaction completely after mixed liquor slurry be delivered to described dewatering system.
4. the wet method detoxifcation of chromium slag as claimed in claim 1 and contaminated soil thereof processes device, it is characterized in that, described dewatering system includes submerged pump, feed-line, dehydration groove and the geotextile tube bag being located in dehydration groove, this submerged pump is for being pumped in geotextile tube bag via this feed-line carry out dehydration by the mixed serum after hybrid reaction in described wet method detoxifcation system, and the water oozed out in described geotextile tube bag oozes out water collection system described in the entrance of described dehydration groove.
5. the wet method detoxifcation of chromium slag as claimed in claim 1 and contaminated soil thereof processes device, it is characterized in that, the described water collection system that oozes out includes collecting pit, immersible pump, feed-line, this immersible pump is located in collecting pit, this feed-line one end is positioned at this collecting pit, the other end connects described wet method detoxifcation system, this collecting pit is for collecting the water seepage of described dewatering system, and water seepage is delivered to described wet method detoxifcation system reuse by the immersible pump in collecting pit by this feed-line after collecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN105396872A (en) * | 2015-12-15 | 2016-03-16 | 北京高能时代环境技术股份有限公司 | Wet process detoxifying processing device and method for chromium slag and contaminated soil of chromium slag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105396872A (en) * | 2015-12-15 | 2016-03-16 | 北京高能时代环境技术股份有限公司 | Wet process detoxifying processing device and method for chromium slag and contaminated soil of chromium slag |
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