CN106180171A - Chromium-polluted soil humic acids segmentation clean and effective prosthetic device - Google Patents
Chromium-polluted soil humic acids segmentation clean and effective prosthetic device Download PDFInfo
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- CN106180171A CN106180171A CN201610565722.0A CN201610565722A CN106180171A CN 106180171 A CN106180171 A CN 106180171A CN 201610565722 A CN201610565722 A CN 201610565722A CN 106180171 A CN106180171 A CN 106180171A
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- chromium
- humic acids
- soil
- prosthetic device
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Food Science & Technology (AREA)
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Chromium-polluted soil humic acids segmentation clean and effective prosthetic device, including pulverizer, conveying worm, intermediate bunker, thread mixing conveyer etc., pulverizer entrance installs reducing agent shower nozzle additional, and pulverizer outlet accesses intermediate bunker by conveying worm；Intermediate bunker lower part outlet accesses thread mixing conveyer entrance；Thread mixing conveyer entrance installs secondary reduction agent shower nozzle additional, installs liquid humic acids shower nozzle additional near outlet, outlet downwards, overall process airtight reduction detoxification and pellet, eliminate process secondary pollution.
Description
1. technical field
The chromium-polluted soil humic acids segmentation clean and effective prosthetic device that the present invention provides, the purification relating to contaminated soil is controlled
Reason, particularly relates to be repaired by chromium-polluted soil.
2. background technology
Ecological environment, food safety and health can be constituted a serious threat by soil pollution, heavy metal pollution in recent years
The soil pollution that thing causes is especially prominent, wherein by the soil most important thing especially of pollution of chromium.
There are nearly 70 main chromium slag contaminated sites in China, adds the enterprises such as a large amount of plating and leather, causes serious soil Cr
Pollute, threaten or endanger subsoil water and drinking water source.It addition, in MSW (mud, flyash, rubbish) and phosphate fertilizer
Containing chromium, implement agricultural reuse owing to these to be had the solid waste of certain fertility so that the chromium content in soil is high
In background value, one of source becoming pollution of chromium.
The improvement recovery technique in pollution of chromium place is emphasis and the difficult point of domestic and international environmental protection Technological research.Chromium is nature master
To stablize valence state with Cr VI Cr (VI) and trivalent chromium Cr (III) two kind to exist.Trivalent chromium is mainly with Cr3+Form exists, activity
Low, toxicity is little；Cr VI is mainly with (HCrO4)-(CrO4)2-Two kinds of forms exist, soluble in water, and activity is high, strong toxicity.
The recovery technique of chromium-polluted soil mainly has two classes at present: one is to change chromium existing forms in soil, by six
Valency chromium is reduced to trivalent chromium, reduces its transfer ability in the environment and bioavailability, thus reduces the danger of chromium pollutant
Evil；Two is to be removed thoroughly from contaminated soil by chromium.The soil restoring technology of pollution of chromium mainly has biological restoration, physics
Repairing method, physical chemistry repairing method, chemical restoration.
Biological restoration includes phytoremediation and microorganism remediation.Microorganism remediation i.e. utilizes the micro-life of the original inhabitants in native soil
Thing or to pollute environment supplement through domestication high-effective microorganism.Under the operating condition optimized, by bioreduction, will
Hexavalent chrome reduction is trivalent chromium, thus repairs contaminated soil.Biological restoration repairing effect is good, low cost, secondary pollution are little, but
Repairing efficiency is very long.
Physical restoration is the soil Cr pollution control measure that comparison is classical, mainly includes that soil moved in improve the original, soil removal and replacement and deep ploughing are digged
Deng measure, digged by soil moved in improve the original, soil removal and replacement and deep ploughing and mix with dirt soil, reduce the content of Chromium in Soil, reduce chromium to soil, plant
The murder by poisoning that system produces.Physical restoration has the advantage that method is simple, the cost time is few, the most stable, but implements quantities
Greatly, investment cost is high, contaminated soil yet suffers from, and destroys soil structures, causes soil fertility to decline, also will be to changing out
Dirty soil carry out stacking or processing.But soil soil moved in improve the original with serious pollution for little area or soil removal and replacement are still a kind of effective side
Method.
Physical chemistry repairing method includes the methods such as electro reclamation, electric heating reparation, Soil leaching.Electro reclamation is in soil
Insert yin, yang electrode, apply unidirectional current, under electric field action, make Cr6+Migrate negative electrode, then focus on.Electric heating is repaired
It is to utilize high frequency voltage to produce magnetic wave, soil is heated, makes chromium separate from soil, thus reach the purpose repaired.Soil
Earth drip washing is to utilize leacheate that the chromium in solid phase of soil is transferred in liquid phase of soil, then the water containing chromium is made place further
Reason.Although physical chemistry repairing method advantage is a lot, but power consumption is relatively big, and the limited area of reparation easily causes secondary pollution etc. and is difficult to
The shortcoming overcome.
Chemical restoration is addition modifying agent in soil, carries out adsorbing, aoxidize, reduce or precipitating, changes chromium at soil
Form present in earth, reduces the biological effectiveness of chromium.This method has that chemical reaction velocity is fast, repair time is short (several weeks
To some months), response strength big, insensitive to pollutant character and concentration, to some be difficult to additive method process organic
The advantages such as thing tool high efficiency, are the chromium-polluted soil Treatment process of most practicality and potentiality.But owing to reducing agent reacts
There is certain condition, often produce secondary pollution or destroy Soil structure.Such as ferrous sulfate reducing process, react with Cr VI and need
Want (PH4)-Sour environment, before using at present reaction, dilute sulfuric acid adjusts pH value, is adjusted to neutrality with Calx again, unavoidably after reaction
Can introduce secondary pollution, soil aggregate destroys simultaneously, and after reparation, on soil, plant cannot grow.There is presently no one to cut
The real modifying agent that effectively reduces.
Humic acids is that vegeto-animal remains are through a series of process such as microbial decomposition and conversion and physical chemistry of the earth etc.
And the class macromole organic monoacid mixture formed, maintain multiple original tax and deposit constituent and biological activity and have
There is abundant functional group, such as aromatic rings, conjugated double bond, hydroxyl, carboxyl, phenolic hydroxyl group, carbonyl etc..Humic acids repairs pollution of chromium soil
Earth, it is not necessary to regulation reaction environment just can occur absorption and reduction reaction with the Cr VI in contaminated soil, then efficiently
Forming chromic complexation body, blocking oxide reacts, and prevents chromic secondary oxidation.Additionally humic acids can also promote soil group
Kernel structure formed, have parcel chromium soil barriers function and improvement soil function, it is ensured that rehabilitating soil recover its plantation and
The function of greening, it is achieved the permanent sustainable reparation of non-secondary pollution.So humic acids is at present most to be expected to industrialization and have
A kind of chromium-polluted soil green in-situ renovation agent of practicality.But when chromium-polluted soil is pulverized, dust is relatively big, work under bad environment,
Easily workmen is damaged；Humic acids is the most difficult with mixing with soil, humic acids large usage quantity, and cost is high；Soil after improvement
Earth reaching standard time is long, and pilot process exists the hidden danger producing secondary pollution, in unexpected repair process, rains suddenly and causes leaching
Go out liquid Cr VI to exceed standard.
3. summary of the invention
The invention aims to overcome the existing a kind of chromium invented containing the deficiency of technology of repairing chromium contaminated soil dirty
Dye soil rotten phytic acid segmentation clean and effective prosthetic device, overall process is airtight, it is to avoid the pollution hidden trouble of burst leachate；That pulverizes is same
Shi Qianghua mixing and in-situ reducing；Segmentation reduction treatment, it is ensured that reduction effect, reduces reducing agent consumption；Reduction soil liquid is rotten
The pellet pelletize of phytic acid, parcel is chromic in blocking granule to ooze out and migrates, it is achieved permanent reduction, with fixing, recovers soil species
Plant function, it is achieved safety, the permanent sustainable green in-situ reparation of low cost.
Technical scheme:
Chromium-polluted soil humic acids segmentation clean and effective prosthetic device, including pulverizer, conveying worm, intermediate bunker,
Thread mixing conveyers etc., pulverizer entrance installs reducing agent atomizer additional, and pulverizer outlet accesses conveying worm；Spiral transferring
5 °-60 ° obliquely of machine, outlet is sent to access the upper entrance of intermediate bunker；The ratio of height to diameter 3-10:1 of intermediate bunker, volume is for pulverizing
1-5 times of machine treating capacity per hour；Intermediate bunker bottom is conical outlet, and cone angle is more than 45 °, with thread mixing conveyer entrance
Connect；Conveying worm 2 °-50 ° obliquely, length 3-35 rice, thread mixing conveyer entrance installs secondary reduction agent shower nozzle additional,
Installing liquid humic acids atomizer at outlet 500-1000mm additional, the outlet of pellet soil is downward, the airtight reduction of overall process
Detoxification and pellet, eliminates process secondary pollution.
Wherein, during reducing agent is humic acids, potassium humate, sodium humate, ferrous sulfate or biomass pyrolysis oil etc.
Planting or multiple, biomass pyrolysis oil is agriculture and forestry organic waste material fast pyrogenation fluid product or the bio oil of gasification generation；
Pulverizer is ball mill, gyratory crusher, toothed roll crusher, impact breaker, impact crusher, hammer
Disintegrating machine, gyratory crusher, compound crusher, hydraulic breaker, deep chamber disintegrating machine, kibbler roll, this circular cone of simon
One in disintegrating machine, hydro cone-crusher, Europe version jaw crusher etc.；
Secondary reduction agent is NaS2, sodium dithionite, formamidine sulfinic acid, sodium thiosulfate, sodium pyrosulfite, sulfurous acid
One or more in hydrogen sodium, sodium sulfite etc..
Liquid humic acids form biomass pyrolysis oil, potassium humate solution or sodium humate solution.
Carry out implementing, testing according to such scheme, it was demonstrated that chromium-polluted soil prosthetic device connection and reasonable arrangement of the present invention, operation letter
Just safety, production cost is low, and quality is good, and efficiency is high, it is achieved in-situ reducing, complexation are fixed and wrap up blocking-up, stop secondary pollution,
Improving natural environment, repair fast, effective, the soil after reparation can normally be planted tree and be grown flower, plants various crops, administers and takes
With low, applied widely, improve economic and social benefits, be properly arrived at predetermined purpose.
The present invention will carry out to describe in detail the feature of the present invention in conjunction with the embodiments.
4. accompanying drawing explanation
Accompanying drawing is assembly of the invention schematic diagram.
The drawing of accompanying drawing is described as follows:
1, pulverizer 2, pulverizer entrance 3, reducing agent atomizer 4, pulverizer outlet 5, conveying worm 6, in
Between feed bin 7, thread mixing conveyer 8, secondary reduction agent shower nozzle 9, liquid humic acids atomizer 10, soil outlet
5. detailed description of the invention
Embodiment, chromium-polluted soil humic acids segmentation clean and effective prosthetic device, including pulverizer 1, conveying worm 5,
Intermediate bunker 6, thread mixing conveyer 7 etc., pulverizer entrance 2 installs reducing agent atomizer 3, pulverizer outlet 4 access spiral shell additional
Rotation conveyer 5；Conveying worm 55 °-60 ° obliquely, outlet accesses the upper entrance of intermediate bunker 6；The Gao Jing of intermediate bunker 6
Ratio 3-10:1, volume is 1-5 times of pulverizer 1 treating capacity per hour；Intermediate bunker 6 bottom is conical outlet, and cone angle is more than
45 °, connect with thread mixing conveyer 7 entrance；Thread mixing conveyer 72 °-50 ° obliquely, thread mixing conveyer 7 length
3-35 rice, entrance installs secondary reduction agent shower nozzle 8 additional, installs liquid humic acids atomizer 9 additional, group at outlet 500-1000mm
The soil outlet 10 of granulation downwards, overall process airtight reduction detoxification and pellet, eliminate process secondary pollution.
Wherein, during reducing agent is humic acids, potassium humate, sodium humate, ferrous sulfate or biomass pyrolysis oil etc.
Planting or multiple, biomass pyrolysis oil is agriculture and forestry organic waste material fast pyrogenation fluid product or the bio oil of gasification generation；
Pulverizer (1) is ball mill, gyratory crusher, toothed roll crusher, impact breaker, impact crusher,
Hammer mill, gyratory crusher, compound crusher, hydraulic breaker, deep chamber disintegrating machine, kibbler roll, simon this
One in gyratory crusher, hydro cone-crusher, Europe version jaw crusher etc.；
Secondary reduction agent is NaS2, sodium dithionite, formamidine sulfinic acid, sodium thiosulfate, sodium pyrosulfite, sulfurous acid
One or more in hydrogen sodium, sodium sulfite etc..
Liquid humic acids form biomass pyrolysis oil, potassium humate solution or sodium humate solution.
When testing, total chromium content in soil content: 3000mg/kg, content of 6-valence Cr ions: 1080mg/kg, pH value: 10.2.Adopt
With chromium-polluted soil humic acids segmentation clean and effective prosthetic device of the present invention, the first step uses the agent chromium biomass pyrolytic than 10:1
Oil, in pulverizing prereduction, after intermediate bunker is placed 1 hour, has then carried out sampling and testing to the soil after repairing.According to " Gu
Body refuse Leaching leaching method sulfonitric method " in (HJ/T 299-2007) leachate of preparing, total chrome content:
15.0mg/L, content of 6-valence Cr ions: 1.6mg/L, pH value: 7.5.Second step is according to residue Cr VI, at 15 meters of long thread mixings
Reduction forced by the sodium dithionite that conveyer entrance uses agent chromium to spray into 8% than 10:1；At outlet 1000mm, use
The pellet pelletize of biomass pyrolysis oil than 2:100 of the agent soil, after placing 30 days, sampling and testing again, total chrome content in leachate
With content of 6-valence Cr ions less than test detection limits.The flowers and plants of the soil plantation after reparation, Semen Maydis etc. can normal growth.
Claims (5)
1. chromium-polluted soil humic acids segmentation clean and effective prosthetic device, including pulverizer, conveying worm, intermediate bunker, spiral shell
Rotation blending transportation machines etc., its feature pulverizer entrance installs reducing agent atomizer additional, and pulverizer outlet accesses conveying worm；Spiral shell
Rotation conveyer 5 °-60 ° obliquely, outlet accesses the upper entrance of intermediate bunker；The ratio of height to diameter 3-10:1 of intermediate bunker, volume is
1-5 times of pulverizer treating capacity per hour；Intermediate bunker bottom is conical outlet, and cone angle is more than 45 °, with thread mixing conveyer
Entrance is connected；Conveying worm 2 °-50 ° obliquely, length 3-35 rice, thread mixing conveyer entrance installs secondary reduction agent spray additional
Head, installs liquid humic acids atomizer at outlet 500-1000mm additional, and downwards, overall process is airtight also for the outlet of pellet soil
Former detoxification and pellet, eliminates process secondary pollution.
Chromium-polluted soil humic acids segmentation clean and effective prosthetic device the most according to claim 1, it is characterised in that reduction
Agent is one or more in humic acids, potassium humate, sodium humate, ferrous sulfate or biomass pyrolysis oil etc., biomass thermal
Solving oil is agriculture and forestry organic waste material fast pyrogenation fluid product or the bio oil of gasification generation.
Chromium-polluted soil humic acids segmentation clean and effective prosthetic device the most according to claim 1, it is characterised in that pulverize
Machine is gyratory crusher, toothed roll crusher, impact breaker, and impact crusher, hammer mill, rotary type are broken
Machine, compound crusher, hydraulic breaker, deep chamber disintegrating machine, kibbler roll, this gyratory crusher of simon, hydraulic cone are broken
One in broken machine, Europe version jaw crusher etc..
Chromium-polluted soil humic acids segmentation clean and effective prosthetic device the most according to claim 1, it is characterised in that secondary
Reducing agent is NaS2, sodium dithionite, formamidine sulfinic acid, sodium thiosulfate, sodium pyrosulfite, sodium sulfite, sulfurous acid
One or more in sodium etc..
Chromium-polluted soil humic acids segmentation clean and effective prosthetic device the most according to claim 1, it is characterised in that liquid
Humic acids form biomass pyrolysis oil, potassium humate solution or sodium humate solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610565722.0A CN106180171A (en) | 2016-07-18 | 2016-07-18 | Chromium-polluted soil humic acids segmentation clean and effective prosthetic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610565722.0A CN106180171A (en) | 2016-07-18 | 2016-07-18 | Chromium-polluted soil humic acids segmentation clean and effective prosthetic device |
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| Publication Number | Publication Date |
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| CN106180171A true CN106180171A (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610565722.0A Withdrawn CN106180171A (en) | 2016-07-18 | 2016-07-18 | Chromium-polluted soil humic acids segmentation clean and effective prosthetic device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825032A (en) * | 2017-03-22 | 2017-06-13 | 中国石油大学(华东) | Chromium-polluted soil humic acid is segmented clean and effective prosthetic device |
| CN106862261A (en) * | 2017-03-22 | 2017-06-20 | 中国石油大学(华东) | Chromium-polluted soil humic acid green in-situ renovation technique |
| CN107649500A (en) * | 2017-09-20 | 2018-02-02 | 华北理工大学 | A kind of soil restoring device |
| CN109370607A (en) * | 2018-12-10 | 2019-02-22 | 中国石油大学(华东) | The modified production soil conditioner of gasifier slag humic acid and its soil improvement reparation application |
| CN109601046A (en) * | 2018-12-10 | 2019-04-12 | 中国石油大学(华东) | The humic acid reparation of slag mountain and greening method |
| CN114160568A (en) * | 2021-11-12 | 2022-03-11 | 焦致劲 | Novel petroleum hydrocarbon polluted soil biological treatment device and method |
-
2016
- 2016-07-18 CN CN201610565722.0A patent/CN106180171A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106825032A (en) * | 2017-03-22 | 2017-06-13 | 中国石油大学(华东) | Chromium-polluted soil humic acid is segmented clean and effective prosthetic device |
| CN106862261A (en) * | 2017-03-22 | 2017-06-20 | 中国石油大学(华东) | Chromium-polluted soil humic acid green in-situ renovation technique |
| CN107649500A (en) * | 2017-09-20 | 2018-02-02 | 华北理工大学 | A kind of soil restoring device |
| CN109370607A (en) * | 2018-12-10 | 2019-02-22 | 中国石油大学(华东) | The modified production soil conditioner of gasifier slag humic acid and its soil improvement reparation application |
| CN109601046A (en) * | 2018-12-10 | 2019-04-12 | 中国石油大学(华东) | The humic acid reparation of slag mountain and greening method |
| CN114160568A (en) * | 2021-11-12 | 2022-03-11 | 焦致劲 | Novel petroleum hydrocarbon polluted soil biological treatment device and method |
| CN114160568B (en) * | 2021-11-12 | 2022-11-01 | 焦致劲 | Petroleum hydrocarbon contaminated soil biological treatment device and method |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20161207 |