CN109570183A - A kind of method of arsenic-containing waste residue solidification and stabilization processing - Google Patents

A kind of method of arsenic-containing waste residue solidification and stabilization processing Download PDF

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Publication number
CN109570183A
CN109570183A CN201811186022.6A CN201811186022A CN109570183A CN 109570183 A CN109570183 A CN 109570183A CN 201811186022 A CN201811186022 A CN 201811186022A CN 109570183 A CN109570183 A CN 109570183A
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CN
China
Prior art keywords
arsenic
solidification
waste residue
containing waste
stabilization
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CN201811186022.6A
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Chinese (zh)
Inventor
吴文卫
姬成岗
毕廷涛
张涛
王金华
吴米娜
赵海亮
杨子轩
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YUNNAN INSTITUTE OF ENVIRONMENTAL SCIENCE (KUNMING CHINA INTERNATIONAL RESEARCH CENTER FOR PLATEAU LAKE)
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YUNNAN INSTITUTE OF ENVIRONMENTAL SCIENCE (KUNMING CHINA INTERNATIONAL RESEARCH CENTER FOR PLATEAU LAKE)
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Priority to CN201811186022.6A priority Critical patent/CN109570183A/en
Publication of CN109570183A publication Critical patent/CN109570183A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00Destroying solid waste or transforming solid waste into something useful or harmless
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G22/00Cultivation of specific crops or plants not otherwise provided for
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G24/00Growth substrates; Culture media; Apparatus or methods therefor
    • A01G24/40Growth substrates; Culture media; Apparatus or methods therefor characterised by their structure
    • A01G24/44Growth substrates; Culture media; Apparatus or methods therefor characterised by their structure in block, mat or sheet form
    • A01G24/46Growth substrates; Culture media; Apparatus or methods therefor characterised by their structure in block, mat or sheet form multi-layered
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B5/00Operations not covered by a single other subclass or by a single other group in this subclass

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Botany (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention belongs to field of solid waste treating technology, and in particular to a kind of method of arsenic-containing waste residue solidification and stabilization processing.A kind of method of arsenic-containing waste residue solidification and stabilization processing includes excavation of earthwork, crushing and screening, solidification and stabilization, stockpiling measurement, landfill and etc..Arsenic-containing waste residue is handled using method of the invention, since cement is a kind of cement inorganic material, hard solidified cement body can be generated after hydration reaction, leached to achieve the purpose that reduce hazard component in waste, be the most economic and material benefit method in solidification processing method.The cement block stability obtained after being handled by this method is good, and the leaching rate of arsenic is low, and solidification is easy to get and low in cost with stabilizer.

Description

A kind of method of arsenic-containing waste residue solidification and stabilization processing
Technical field
The invention belongs to field of solid waste treating technology, and in particular to a kind of processing of arsenic-containing waste residue solidification and stabilization Method.
Background technique
Currently, the processing method to arsenic-containing waste residue is varied, wherein most commonly seen with curing/stabilizing technology.And consolidate Change/stabilization technology is divided into following several according to the difference of the principle of solidification, and cement based stabilization/curing method, lime base are stablized Change/solidification method, asphalt stabilization/curing method, thermoplastic stabilization/curing, glass stabilization/curing method and chemical stabilization Technology.
Solidification and stabilization technology is the main recovery technique in China's contaminated site especially heavy metal pollution class place, however China is unified not yet and explicitly evaluates the method and standard of solidification and stabilization repairing effect, also lacks solidification and stabilization product Final disposal or the management regulation for recycling mode, therefore the stability of arsenic slag is to determine that its recovery project is real after solidification and stabilization Principal element occurs for secondary pollution during applying.
Practiced according to developed country's solidification and stabilization recovery project: its most of solidification and stabilization is repaired place and is grown Phase tracking and monitoring is attached most importance to groundwater environment safety monitoring, and the monitoring data table that history is up to more than 20 years places is repaired in part Bright, the long-range circumstances safety of solidification and stabilization technology is fine, substantially not there is a phenomenon where being more than expected standard, and partially refers to Mark the trend for having showed and significantly having improved at any time.
In recent years, the recovery technique being most widely used in the reparation of China's contaminated site is solidification and stabilization, in addition China There has been no the methods and standard of unified and specific evaluation solidification and stabilization repairing effect, therefore many scholars also just stablize by solidification The stability of change has carried out experimental study.But there has been no the solidification and stabilizations that a whole set of can be wide, perfect with applicability at present Processing system and processing method.
Summary of the invention
It is an object of the present invention to solve the deficiency of the existing technology and provide a kind of processing of arsenic-containing waste residue solidification and stabilization Method.
The present invention is achieved by the following technical solution:
A kind of method of arsenic-containing waste residue solidification and stabilization processing, comprises the following steps,
(1) excavation of earthwork, the earth excavation by the way of mechanical excavation, average cutting depth is 2.5m, obtains arsenic-containing waste residue, opens Using the concentration of arsenic in Portable X RF on-site measurement soil during digging, the arsenic-containing waste residue excavated out is transported using airtight transportation vehicle It is defeated;The ponding occurred in digging process is evacuated to arsenic-containing waste water collecting pit with water pump, is transported at landfill yard water treatment system Reason;Control moisture content≤25% of arsenic-containing waste residue;
(2) crushing and screening, using movable Crushing screening process device, so that the partial size < 10mm of obtained arsenic-containing waste residue, and The sundries that equipment runs well is influenced without containing cloth waste, iron wire, reinforcing bar, branch, weeds etc.;
(3) solidification and stabilization, the arsenic-containing waste residue obtained afterwards after crushing and screening are sent into feeding warehouse by belt conveyor, then percutaneously Band transporter is sent into mobile solidification stabilization system and equipment is mixed, and is proportionally added into cement and solidification stabilizer, passes through Cement block is obtained after block machine molding, between cement block send the waste in curing/stabilizing workshop temporary after metering;Control water The moisture content of clod is 30%;
(4) stockpiling measurement measures its compression strength, contains after the solidification and stabilization cement block that treated obtains places 7-10 d The content of water rate and leaching arsenic;When the result measured is compression strength >=0.5MPa, moisture content is 30% ± 2%, leaching arsenic When content≤2.5mg/L, into landfill operation, otherwise return step (2) is handled again;
(5) it fills, the cement block that will be provided with landfill condition is transported to landfill yard and carries out security landfill disposition, is equipped with and covers above buring layer Cap rock, coating depth > 1.3m.
Cement passes through quantitative discharging device and screw conveyor feeding mixing equipment under cement bunker.
Solidification is delivered to mixing equipment by metering pump from make-up tank with stabilizer.
Preferably, the cement consumption of arsenic-containing waste residue per ton is 30kg, the dosage of arsenic-containing waste residue per ton solidified with stabilizer For 30L.
The solidification is the solidification proprietary medicament that stabilizer is that engineering proportion is 3% with stabilizer, described Proprietary medicament is ion mineralising stabilizer GF206 medicament.
Preferably, the belt conveyor is closed belt conveyor.
Preferably, the arsenic-containing waste residue includes the slag containing arsenic and the soil crossed by arsenic pollution.
The coating is followed successively by back fill course, cobble hydrophobic layer and HDPE antiseepage film layer from top to bottom, and described returns The thickness G T.GT.GT 1m of fill stratum, kind is implanted with plant on back fill course;The cobble hydrophobic layer with a thickness of 0.3m, cobble hydrophobic layer Geotechnological non-woven fabrics 1 is equipped between back fill course;The HDPE antiseepage film layer is the smooth surface HDPE geomembrane with a thickness of 1mm, Geotechnological non-woven fabrics 2 is equipped between HDPE antiseepage film layer and cobble hydrophobic layer.
The geotechnological non-woven fabrics 1 is 300g/m2Geotechnological non-woven fabrics, the geotechnological non-woven fabrics 2 be 600g/m2Soil Work non-woven fabrics.
Compared with prior art, the invention has the following beneficial effects: the present invention provides a kind of using cement to containing arsenic The method of residue stabilization stabilization processes can directly be neutralized, cement solidification because cement is alkaline matter with spent acid class waste When need to use water and make reactant, so the waste bigger to water content is also suitable.Arsenic is contained using method processing of the invention Since cement is a kind of cement inorganic material hard solidified cement body can be generated, to reach in waste residue after hydration reaction It is the most economic and material benefit method in solidification processing method to the purpose that hazard component leaches in waste is reduced.Pass through we Obtained cement block stability is good after method processing, and the leaching rate of arsenic is low, and solidification is easy to get and low in cost with stabilizer.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of coating of the invention;
In figure: 1- plant, 2- back fill course, 3- geotechnique's non-woven fabrics Isosorbide-5-Nitrae-cobble hydrophobic layer, 5- geotechnique's non-woven fabrics 2,6-HDPE are anti- Seep film layer, 7- cement block.
Specific embodiment
Below with reference to embodiment, the present invention will be further described, but protection scope of the present invention is not limited by embodiment System.
Embodiment 1
A kind of method of arsenic-containing waste residue solidification and stabilization processing, comprises the following steps,
(1) excavation of earthwork, the earth excavation by the way of mechanical excavation, average cutting depth is 2.5m, obtains arsenic-containing waste residue, opens Using the concentration of arsenic in Portable X RF on-site measurement soil during digging, the arsenic-containing waste residue excavated out is transported using airtight transportation vehicle It is defeated;The ponding occurred in digging process is evacuated to arsenic-containing waste water collecting pit with water pump, is transported at landfill yard water treatment system Reason;Control moisture content≤25% of arsenic-containing waste residue;
(2) crushing and screening, using movable Crushing screening process device, so that the partial size < 10mm of obtained arsenic-containing waste residue, and The sundries that equipment runs well is influenced without containing cloth waste, iron wire, reinforcing bar, branch, weeds etc.;
(3) solidification and stabilization, the arsenic-containing waste residue obtained afterwards after crushing and screening are sent into feeding warehouse by belt conveyor, then percutaneously Band transporter is sent into mobile solidification stabilization system and equipment is mixed, and is proportionally added into cement and solidification stabilizer, passes through Cement block is obtained after block machine molding, between cement block send the waste in curing/stabilizing workshop temporary after metering;Control water The moisture content of clod is 30%;
(4) stockpiling measurement measures its compression strength, contains after the solidification and stabilization cement block that treated obtains places 7-10 d The content of water rate and leaching arsenic;When the result measured is compression strength >=0.5MPa, moisture content is 30% ± 2%, leaching arsenic When content≤2.5mg/L, into landfill operation, otherwise return step (2) is handled again;
(5) it fills, the cement block that will be provided with landfill condition is transported to landfill yard and carries out security landfill disposition, is equipped with and covers above buring layer Cap rock, coating depth > 1.3m.
Cement passes through quantitative discharging device and screw conveyor feeding mixing equipment under cement bunker.
Solidification is delivered to mixing equipment by metering pump from make-up tank with stabilizer.
Preferably, the cement consumption of arsenic-containing waste residue per ton is 30kg, the dosage of arsenic-containing waste residue per ton solidified with stabilizer For 30L.
The solidification is the solidification proprietary medicament that stabilizer is that engineering proportion is 3% with stabilizer, described Proprietary medicament is ion mineralising stabilizer GF206 medicament.
Preferably, the belt conveyor is closed belt conveyor.
Preferably, the arsenic-containing waste residue includes the slag containing arsenic and the soil crossed by arsenic pollution.
The coating is followed successively by back fill course, cobble hydrophobic layer and HDPE antiseepage film layer from top to bottom, and described returns The thickness G T.GT.GT 1m of fill stratum, kind is implanted with plant on back fill course;The cobble hydrophobic layer with a thickness of 0.3m, cobble hydrophobic layer Geotechnological non-woven fabrics 1 is equipped between back fill course;The HDPE antiseepage film layer is the smooth surface HDPE geomembrane with a thickness of 1mm, Geotechnological non-woven fabrics 2 is equipped between HDPE antiseepage film layer and cobble hydrophobic layer.
The geotechnological non-woven fabrics 1 is 300g/m2Geotechnological non-woven fabrics, the geotechnological non-woven fabrics 2 be 600g/m2Soil Work non-woven fabrics.

Claims (9)

1. a kind of method of arsenic-containing waste residue solidification and stabilization processing, which is characterized in that it comprises the following steps,
(1) excavation of earthwork, the earth excavation by the way of mechanical excavation, average cutting depth is 2.5m, obtains arsenic-containing waste residue, opens Using the concentration of arsenic in Portable X RF on-site measurement soil during digging, the arsenic-containing waste residue excavated out is transported using airtight transportation vehicle It is defeated;The ponding occurred in digging process is evacuated to arsenic-containing waste water collecting pit with water pump, is transported at landfill yard water treatment system Reason;Control moisture content≤25% of arsenic-containing waste residue;
(2) crushing and screening, using movable Crushing screening process device, so that the partial size < 10mm of obtained arsenic-containing waste residue;
(3) solidification and stabilization, the arsenic-containing waste residue obtained afterwards after crushing and screening are sent into feeding warehouse by belt conveyor, then percutaneously Band transporter is sent into mobile solidification stabilization system and equipment is mixed, and is proportionally added into cement and solidification stabilizer, passes through Cement block is obtained after block machine molding, between cement block send the waste in curing/stabilizing workshop temporary after metering;Control water The moisture content of clod is 30%;
(4) stockpiling measurement measures its compression strength, contains after the solidification and stabilization cement block that treated obtains places 7-10 d The content of water rate and leaching arsenic;When the result measured is compression strength >=0.5MPa, moisture content is 30% ± 2%, leaching arsenic When content≤2.5mg/L, into landfill operation, otherwise return step (2) is handled again;
(5) it fills, the cement block that will be provided with landfill condition is transported to landfill yard and carries out security landfill disposition, is equipped with and covers above buring layer Cap rock, coating depth > 1.3m.
2. a kind of method of arsenic-containing waste residue solidification and stabilization processing according to claim 1, which is characterized in that cement passes through Quantitative discharging device and screw conveyor under cement bunker, which are sent into, is mixed equipment.
3. a kind of method of arsenic-containing waste residue solidification and stabilization processing according to claim 1, which is characterized in that solidification is with surely Determine agent and mixing equipment is delivered to by metering pump from make-up tank.
4. a kind of method of arsenic-containing waste residue solidification and stabilization processing according to claim 1, which is characterized in that per ton to contain arsenic The cement consumption of waste residue is 30kg, and the dosage of the solidification stabilizer of arsenic-containing waste residue per ton is 30L.
5. a kind of method of arsenic-containing waste residue solidification and stabilization processing according to claim 1, which is characterized in that described consolidates Change is ion mineralising stabilizer GF206 medicament with the proprietary medicament that stabilizer is that engineering proportion is 3%, the proprietary medicament.
6. a kind of method of arsenic-containing waste residue solidification and stabilization processing according to claim 1, which is characterized in that the skin Band conveyer is closed belt conveyor.
7. a kind of method of arsenic-containing waste residue solidification and stabilization processing according to claim 1, which is characterized in that described contains Arsenic waste residue includes the slag containing arsenic and the soil crossed by arsenic pollution.
8. a kind of method of arsenic-containing waste residue solidification and stabilization processing according to claim 1, which is characterized in that described covers Cap rock is followed successively by back fill course, cobble hydrophobic layer and HDPE antiseepage film layer from top to bottom, the thickness G T.GT.GT 1m of the back fill course, Kind is implanted with plant on back fill course;The cobble hydrophobic layer with a thickness of 0.3m, set between cobble hydrophobic layer and back fill course There is geotechnological non-woven fabrics 1;The HDPE antiseepage film layer is the smooth surface HDPE geomembrane with a thickness of 1mm, HDPE antiseepage film layer and ovum Geotechnological non-woven fabrics 2 is equipped between stone hydrophobic layer.
9. a kind of method of arsenic-containing waste residue solidification and stabilization processing according to claim 8, which is characterized in that the soil Work non-woven fabrics 1 is 300g/m2Geotechnological non-woven fabrics, the geotechnological non-woven fabrics 2 be 600g/m2Geotechnological non-woven fabrics.
CN201811186022.6A 2018-10-12 2018-10-12 A kind of method of arsenic-containing waste residue solidification and stabilization processing Pending CN109570183A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111266402A (en) * 2020-02-20 2020-06-12 北京市环境保护科学研究院 Biological barrier system and method for blocking path of benzene series in field to move to atmosphere
CN113716925A (en) * 2021-08-02 2021-11-30 上海市政工程设计研究总院(集团)有限公司 Method for solidifying and stabilizing heavy metal arsenic in tailings and/or slag
CN115093168A (en) * 2022-06-23 2022-09-23 昆明理工大学 Method for fixing arsenic in tin tailings by using cement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343422A1 (en) * 1983-12-01 1985-06-20 Kernforschungsanlage Jülich GmbH, 5170 Jülich METHOD FOR CONDITIONING CONTAMINATED WASTE BY CEMENTING
JP4130762B2 (en) * 2002-11-05 2008-08-06 Jfeミネラル株式会社 Heavy metal stabilization treatment method
CN204657080U (en) * 2015-04-13 2015-09-23 湖南艾布鲁环保科技有限公司 Arsenic slag safe disposal system
CN204672683U (en) * 2015-05-29 2015-09-30 湖南艾布鲁环保科技有限公司 A kind of arsenic slag solidification process integrated system
CN107789787A (en) * 2017-09-22 2018-03-13 广西壮族自治区环境监测中心站 For repairing the stabilization agent and application method of arsenic-containing waste residue

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3343422A1 (en) * 1983-12-01 1985-06-20 Kernforschungsanlage Jülich GmbH, 5170 Jülich METHOD FOR CONDITIONING CONTAMINATED WASTE BY CEMENTING
JP4130762B2 (en) * 2002-11-05 2008-08-06 Jfeミネラル株式会社 Heavy metal stabilization treatment method
CN204657080U (en) * 2015-04-13 2015-09-23 湖南艾布鲁环保科技有限公司 Arsenic slag safe disposal system
CN204672683U (en) * 2015-05-29 2015-09-30 湖南艾布鲁环保科技有限公司 A kind of arsenic slag solidification process integrated system
CN107789787A (en) * 2017-09-22 2018-03-13 广西壮族自治区环境监测中心站 For repairing the stabilization agent and application method of arsenic-containing waste residue

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111266402A (en) * 2020-02-20 2020-06-12 北京市环境保护科学研究院 Biological barrier system and method for blocking path of benzene series in field to move to atmosphere
CN113716925A (en) * 2021-08-02 2021-11-30 上海市政工程设计研究总院(集团)有限公司 Method for solidifying and stabilizing heavy metal arsenic in tailings and/or slag
CN115093168A (en) * 2022-06-23 2022-09-23 昆明理工大学 Method for fixing arsenic in tin tailings by using cement

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