CN110092567A - A kind of shield soil processing method - Google Patents

A kind of shield soil processing method Download PDF

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Publication number
CN110092567A
CN110092567A CN201910289280.5A CN201910289280A CN110092567A CN 110092567 A CN110092567 A CN 110092567A CN 201910289280 A CN201910289280 A CN 201910289280A CN 110092567 A CN110092567 A CN 110092567A
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CN
China
Prior art keywords
mud
water
dregs
shield
soil processing
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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CN201910289280.5A
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Chinese (zh)
Inventor
肖为
胡不为
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Hunan Jinjia Environmental Protection Technology Co Ltd
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Hunan Jinjia Environmental Protection Technology Co Ltd
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Priority to CN201910289280.5A priority Critical patent/CN110092567A/en
Publication of CN110092567A publication Critical patent/CN110092567A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B3/00Destroying solid waste or transforming solid waste or contaminated solids into something useful or harmless
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B3/00Destroying solid waste or transforming solid waste or contaminated solids into something useful or harmless
    • B09B3/0058Removing gases or liquids enclosed in discarded articles, e.g. aerosol cans, cooling systems of refrigerators ; Removing gases from discarded plastic foam products
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/147Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances

Abstract

The present invention provides a kind of shield soil processing method, and the dregs that the method for the present invention can generate two kinds of shield construction methods is handled, and expands the process range to shield dregs.And the particulate matter separated can be according to its intensity and partial size as building foundation material or construction backfill materials, and soil can be used as brickmaking raw material after desiccation or collocation other materials is modified to planting soil, realize the resource utilization to shield dregs.And technical treatment has been carried out to the surfactant in dregs, reduce influence of the shield dregs to environment.

Description

A kind of shield soil processing method
Technical field
The present invention relates to the processing technology fields of shield engineering slurry, more particularly to a kind of quickly processing high viscosity shield work The processing method of journey mud.
Technical background
Currently, being built in shallow embedding soft soil layer shield method is widely used in the Tunnel Engineering such as subway, water conservancy, road applies Work can generate a large amount of shield dregs during shield-tunneling construction, and a large amount of shield dregs has rubble and larger particles, greatly The shield dregs of amount there are problems that being difficult disposition.Although being set when the processing of some engineering slurry by changing original technique It is standby, pressure filtration technique is such as used, realizes dehydration problem, but this scheme needs to put into a large amount of fund purchase, installation Other equipment, for needing for original place processing, the quickly engineering of processing, a large amount of processing mud conditioning or uneconomical and not Applicable.And existing shield slurry processing technique is at the environmental protection for slurry shield method construction discarded slurry at present Reason, makes its mud reach reuse standard, the solid in extra water and mud is discharged.Lack and earth pressure balanced shield, EPBS method is generated Mud dregs processing technique.Patent document CN109231897A discloses that a kind of shield dregs is innoxious, recycling treatment Method, but this method is there are shield dregs reduced training is poor, and environmental protection treatment is ineffective, and obtained mud is not up to reuse mark Quasi-, harmful to environment, the problems such as wasting water.
Summary of the invention
For the above-mentioned deficiency for solving the prior art, the present invention provides a kind of shield soil processing method, and the method for the present invention can be with The dregs generated to two kinds of shield construction methods is handled, and expands the process range to shield dregs.And it separates Particulate matter can be according to its intensity and partial size as building foundation material or construction backfill materials, soil can be made after desiccation It is modified to planting soil for brickmaking raw material or collocation other materials, realizes the resource utilization to shield dregs.And in dregs Surfactant carried out technical treatment, reduce influence of the shield dregs to environment.
The specific technical solution of the present invention is as follows:
A kind of shield soil processing method, the described method comprises the following steps:
One), slurry separates, and dregs is rinsed and is sieved using waterpower, the solid particle in dregs is separated;
Two) remaining mud after solid particle, is screened out to slurry separation and carries out desiccation, be added in mud coagulant, Permeability-reducing admixture and filter aid change mud property, then will carry out dehydration and drying in the mud merging filter press after change performance;Desiccation Soil moisture content is low afterwards, and the more untreated dregs of mechanical property is more conducive to safety and stacks, and is not easy inundated intenerating.
Three), the water isolated to mud desiccation is handled, the surfactant in purified water, water reuse that treated To slurry separate section.Water resource can be saved to the recycling of water.
Further, in the slurry separating step, classify to the solid particle isolated, sorted solid Grain can be recycled, and the higher sandstone of intensity is used as construction material, and intensity is lower to be backfilled for roadbed.
Further, in the slurry separating step, the coagulant that uses by water and anionic polyacrylamide and it is non-from Sub- polyacrylamide mixes.
Further, in the slurry separating step, the permeability-reducing admixture used be include polyacrylamide, calcium oxide and phosphorus The mixture of acid dihydride potassium.Polyacrylamide is non-ionic using 600,000 molecular weight.
Further, in the slurry separating step, the filter aid used be include aluminium polychloride, flyash and corruption Grow the mixture of sour potassium.
Further, in the slurry separating step, the solid particulate matter in screening plant separation dregs is used.Soil pressure is flat The supplied materials of weighing apparatus method shield dregs processing is a kind of in stream plastic state, the thick slurry form containing particulate matter, because of the shield method The geological condition of adaptation causes the viscosity of mud greatly and illiquidity, for this part dregs, needs to use so being not easy to sieve High pressure water rinses the solid particulate matter sub-elected, cleans adherency mud and is repeatedly diluted with water mud.
Further, the specific steps of the slurry separation are implemented are as follows: future, material heap was placed on supplied materials level ground, used forklift or dress Carrier aircraft transports into material pond from supplied materials level ground, and clear water dilution is added according to pan feeding rate into material pond, and the pan feeding rate can be One minute 1~2 scraper bowl, pan feeding and clear water additional proportion are 2:1, after being lifted into the mud in material pond using bucket elevator Continuous screening.Grid is set in material pond, the solid that 15cm particle diameter is greater than in dregs is kept off except material pond, is avoided excessive Object enters, and destroys elevator and screening installation.Dregs after dilution is sent into primary screening plant by bucket elevator.Primary sieve Subset is Double-layer revolving drum screen, and 2 meters of internal layer diameter, 7 meters of length, 2.5 meters of outer layer diameter, 5.5 meters long, 1 meter of internal layer entrance is Thick steel plate reel, distribution triangular steel plate are used to break the soil block of adhesion, behind 6 meters of a length of aperture 5cm square-mesh screen, outer layer is The manganese steel sieve of aperture 6mm, ectonexine outlet is at a distance of 0.5 meter.Two rows of high pressure water nozzles are provided with outside sieve, are made for rinsing sieve It is also equipped with high pressure water nozzle in sieve, for rinsing sieve front and middle part, is conducive to clean up particle from blocking Object, the solid particle that internal layer exit filters out are mixing particles, need to further be sieved, and are needed through the slurry containing sand mud of sieve It collects and further does mud conditioning after containing sand.Second level separating sieve be 3 meters of long rotary screens, 1.5 meters of internal layer diameter, aperture 1.5cm, 1.8 meters of outer layer diameter, aperture 6mm.Ectonexine is manganese steel sieve, the high-pressure washing equipment of the second level separating sieve with Primary screening plant it is identical, handled together with the mud of primary screening plant through the mud of sieve.
Further, the mud after screening is separated through wheeled sand washer, spiral sand seperator, dewatering screen and hydrocyclone Enter mud conditioning link after containing sand out.Sorting is to recycle valuable part in dregs, and is mud desiccation Processing removal impurity.
Further, in the mud drying and other treatment link, it is necessary first to mud be concentrated, mitigate the negative of subsequent mud conditioning Lotus, the dosing coagulant in proportion into mud, after being sufficiently mixed reaction, via physical sedimentation, isolates the part water in mud Point, physical sedimentation uses the extraordinary vertical sedimentation basin for adapting to mud character or extraordinary rectangular sedimentation tank, can be continuous Isolate surface layer clear water and concentration mud.Mud after concentration needs to add permeability-reducing admixture, filter aid again, after being sufficiently mixed reaction Filter press is sent into using high pressure slush pump and squeezes out mud moisture using high pressure, the use of filter press is chamber-type press filter, after pressing dry Moisture content of the cake about 30% or so, since pharmacy effect is not easy to meet aquation slurry, the surfactant after desiccation in soil is not easy to It is oozed out after meeting water.The water separated in filters pressing and concentration process enters the water process link.
Further, in the water process link, the main target of water process is the surfactant and water in water removal Middle suspended matter etc., when ensureing reuse will not concentration surface activating agent, generate and foam and environment caused when defiber being avoided to produce It influences, ensures the cleannes of recycle-water, will not influence the cleanliness for the particulate matter isolated.The water process link is first using bubble Surfactant in the separation water outlet of foam partition method, foamet is to be passed through air in the waste water containing surfactant and produce Raw a large amount of bubbles, make the SURFACTANT ADSORPTION in waste water form foam in bubble surface, and water surface enrichment is shifted on foam Froth bed is formed, removing froth bed can be such that waste water is purified, and foamet is especially adapted for use in the case of low concentration Separation.The water of froth bed removes surfactant using catalytic oxidation, and catalytic oxidation is to traditional chemical oxidizing process Improve and strengthen, add make after a small amount of ferrous sulfate and a certain proportion of edible hydrogen peroxide its be uniformly mixed react abundant after again Secondary carry out foam fraction factor.Water after foam fraction factor carries out coagulating treatment, and coagulating treatment can remove suspended matter in water removal, lower in water Colloidal solid and the surfactant being adsorbed on colloid surface in COD, removal waste water, moreover it is possible to the surface being dissolved in water phase The precipitating of activating agent formation slightly solubility.Coagulation Method is the side that Xiang Shuizhong dosing coagulant makes suspended matter and the agglomerating precipitating of colloid in water Method, the medicament generally used have aluminium salt, molysite and organic medicament, the mixture for aluminium salt and molysite are used in this technique, is added When medicament, a small amount of edible hydrogen peroxide, intensive treatment surfactant are added.Treated, and water enters in reservoir waits back With.
The beneficial effect of the invention is:
1, the dregs that can be generated to two kinds of shield construction methods is handled, and expands the processing model to shield dregs It encloses, and by using coagulant, permeability-reducing admixture and filter aid, high to the treatment effeciency of shield soil, program is simple, easy to use.
2, resource utilization is carried out to shield dregs, the particulate matter separated can be used as according to its intensity and partial size and build Basic material or construction backfill materials are built, soil can be used as brickmaking raw material after desiccation or collocation other materials is modified to kind Plant soil, water can utilize again, turn waste into wealth, and improve economic value, make shield dregs recycling, minimizing, it is innoxious, subtract Few soil consumption.
3, technical treatment has been carried out to the surfactant in dregs, has reduced influence of the shield dregs to environment.
4, the chemicals treatment effect that the present invention uses is good and environmentally friendly, and each component of formula is commercially available price Relatively inexpensive commodity, processing cost is low, is computed, and significantly reduces processing cost, is conducive to large-scale promotion application.
Detailed description of the invention
Fig. 1 is shield soil processing method flow chart of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, the present invention provides a kind of shield soil processing method, the described method comprises the following steps:
One), slurry separates, and dregs is rinsed and is sieved using waterpower, the solid particle in dregs is separated, The solid particle separated is classified and recycled, the higher sandstone of intensity is used as construction material, and intensity is lower For roadbed backfill;
Two) remaining mud after solid, is screened out to slurry separation and carries out mud desiccation, be added in mud coagulant, Permeability-reducing admixture, filter aid change mud property, then will carry out dehydration and drying, desiccation in the mud merging filter press after change performance Soil moisture content is low afterwards, and the more untreated dregs of mechanical property is more conducive to safety and stacks, and is not easy inundated intenerating;
Three), the water isolated to mud desiccation is handled, surfactant in purified treatment water, and treated, and water returns With to slurry separate section.Water resource can be saved to the recycling of water.
In slurry separation, the particulate matter in dregs, earth pressure balance method shield dregs specifically are isolated using screening plant The supplied materials of processing is a kind of in stream plastic state, the thick slurry form containing particulate matter, because of the geology feelings that the shield method adapts to Condition causes the viscosity of mud big and illiquidity, so being not easy to sieve, this kind of dregs is needed to rinse sorting with high pressure water Particulate matter out, to clean adherency mud and repeatedly be diluted with water mud.Specific implementation method be future material heap be placed on supplied materials level ground, It is sent into material pond from material level ground using forklift (loading machine), according to the pan feeding rate of one minute 1~2 scraper bowl (by 50 shovels in material pond 2.5 sides that struggle against calculate, about 150~300 sides/hour) clear water dilution is added, pan feeding and the control of clear water ratio use in 2:1, material pond Bucket elevator promotes mud and enters subsequent screening.Grid will be greater than 15cm particle diameter solid in dregs is set in material pond Gear avoids excessive object from entering and destroys elevator and screening installation except material pond.Dregs after dilution is by bucket elevator It is sent into primary screening plant, primary screening plant is Double-layer revolving drum screen, 2 meters of internal layer diameter, 7 meters of length, 2.5 meters of outer layer diameter, 5.5 meters long, 1 meter of internal layer entrance is thick steel plate reel, and distribution triangular steel plate is used to break the soil block of adhesion, behind 6 meters it is a length of The square-mesh screen of aperture 5cm, outer layer are the manganese steel sieve of aperture 6mm, and ectonexine outlet is at a distance of 0.5 meter.Two are provided with outside sieve Arrange high pressure water nozzle, make it from blocking for rinsing sieve, high pressure water nozzle be also equipped in sieve, for rinse sieve front and Middle part is conducive to clean up particulate matter, and the solid particle that internal layer exit filters out is mixing particles, need to further be sieved Divide, further does mud conditioning through containing after sand mud slurry needs collection to contain sand for sieve.Second level separating sieve is 3 meters of long rotary screens, 1.5 meters of internal layer diameter, aperture 1.5cm, 1.8 meters of outer layer diameter, aperture 6mm.Ectonexine is manganese steel sieve, second level separating sieve High-pressure washing equipment is identical as primary screening plant, handles together with the mud of primary screening plant through the mud of sieve. Mud enters mud conditioning link after wheeled sand washer, spiral sand seperator, dewatering screen and hydrocyclone are isolated containing sand. Sorting is and for mud drying and other treatment to remove impurity to recycle valuable part in dregs.
In mud drying and other treatment link, it is necessary first to mud be concentrated, mitigate the load of subsequent mud conditioning, pressed into mud Ratio dosing coagulant after being sufficiently mixed reaction, via physical sedimentation, isolates the partial moisture in mud, physical sedimentation makes It is the extraordinary vertical sedimentation basin or extraordinary rectangular sedimentation tank for adapting to mud character, it is clear can continuously isolates surface layer Water and concentration mud.Mud after concentration needs to add permeability-reducing admixture, filter aid again, uses high pressure mud after being sufficiently mixed reaction It is pumped into filter press and squeezes out mud moisture using high pressure, the use of filter press is chamber-type press filter, the moisture content of the cake after pressing dry is about 30% or so, since pharmacy effect is not easy to meet aquation slurry, the surfactant after desiccation in soil is not easy to ooze out after meeting water.Pressure The water separated in filter and concentration process enters water process link.
In the slurry separating step, the coagulant used is by water and anionic polyacrylamide and nonionic polypropylene Amide mixes.The concentration of non-ionic polyacrylamide is 0.03%~0.01%, i.e. be added in 1 liter of water 300 milligrams~ 100 milligrams of non-ionic polyacrylamide pulvis.The concentration of anion-polyacrylamide is 0.02%~0.01%, i.e., 1 Rise the anion-polyacrylamide pulvis of 200 milligrams~100 milligrams of addition in water.The molecular weight of anionic polyacrylamide is 12000000, the molecular weight of non-ionic polyacrylamide is 6,000,000.
In the slurry separating step, the permeability-reducing admixture used includes polyacrylamide, calper calcium peroxide, bentonite and phosphoric acid Potassium dihydrogen, weight are as follows: polyacrylamide 60-85, calcium oxide 5-50, potassium dihydrogen phosphate 10-20.Polyacrylamide is adopted It is non-ionic with 600,000 molecular weight.
The filter aid used is the mixture for including aluminium polychloride, flyash and potassium humate.
In water process link, the main target of water process is suspended matter etc. in surfactant and water in water removal, is protected When hindering reuse will not concentration surface activating agent, generate and foam and environment impacted when defiber being avoided to produce, ensure reuse The cleannes of water will not influence the cleanliness for the particulate matter isolated.Water process first uses table in foamet separation water outlet Face activating agent, foam method are to be passed through air in the waste water containing surfactant and generate a large amount of bubbles, make the table in waste water Face activating agent is adsorbed in bubble surface and forms foam, and the water surface is shifted on foam and is enriched with to form froth bed, removes froth bed and is Waste water can be made to be purified, foamet is especially adapted for use in the separation in the case of low concentration.The water use of froth bed is urged Change oxidizing process and remove surfactant, catalytic oxidation is the improvement and reinforcing to traditional chemical oxidizing process, adds a small amount of sulfuric acid It is ferrous with make after a certain proportion of edible hydrogen peroxide its be uniformly mixed react abundant after carry out foam fraction factor again.Foam fraction factor Water afterwards carries out coagulating treatment, and coagulating treatment can remove suspended matter in water removal, lower COD in water, colloidal solid in removal waste water With the surfactant being adsorbed on colloid surface, moreover it is possible to form the heavy of slightly solubility with the surfactant being dissolved in water phase It forms sediment.Coagulation Method is the method that Xiang Shuizhong dosing coagulant makes suspended matter and the agglomerating precipitating of colloid in water, and the medicament generally used has Aluminium salt molysite and organic medicament when adding medicament, add a small amount of food-grade using the mixture for aluminium salt and molysite in this technique Hydrogen peroxide, intensive treatment surfactant.Treated, and water enters that reuse is waited in reservoir.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Belong to those skilled in the art in the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, all answers It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.

Claims (10)

1. a kind of shield soil processing method, which is characterized in that the described method comprises the following steps:
One), slurry separates, and dregs is rinsed and is sieved using waterpower, the solid particle in dregs is separated;
Two) remaining mud carries out desiccation after, screening out solid particle to slurry separation, and coagulant, antiseepage are added in mud Agent and filter aid change mud property, then will carry out dehydration and drying in the mud merging filter press after change performance;
Three), the water isolated to mud desiccation is handled, the surfactant in purified water.
2. shield soil processing method according to claim 1, which is characterized in that in slurry separation, use screening plant point From the particulate matter in dregs.
3. shield soil processing method according to claim 1, which is characterized in that slurry separation specific steps include: by Supplied materials is deposited in supplied materials level ground, is transported into material pond using forklift or loading machine from supplied materials level ground, is added into material pond according to pan feeding rate Enter clear water dilution, the dregs after dilution is sent into primary screening plant by bucket elevator.
4. shield soil processing method according to claim 3, which is characterized in that sieved using second level separating sieve to by primary Mixing particles after equipment screening are further sieved.
5. shield soil processing method according to claim 1, which is characterized in that the mud after sieving in slurry separation is through taking turns Formula sand washer, spiral sand seperator, dewatering screen and hydrocyclone are isolated containing entering mud conditioning link after husky.
6. shield soil processing method according to claim 1, which is characterized in that dense first in mud drying and other treatment link Contracting mud, the dosing coagulant in proportion into mud, after being sufficiently mixed reaction, the part in mud is isolated via physical sedimentation Moisture;Mud after concentration adds permeability-reducing admixture, filter aid again, is sufficiently mixed after reaction and is sent into filter press using high pressure slush pump Mud moisture is squeezed out using high pressure.
7. shield soil processing method according to claim 1, which is characterized in that in water process link, use foam fraction factor Surfactant in method separation water outlet.
8. shield soil processing method according to claim 7, which is characterized in that carried out at coagulation to the water after foam fraction factor Reason.
9. shield soil processing method according to claim 8, which is characterized in that it is mixed that the coagulating treatment is that Xiang Shuizhong is added Solidifying agent makes suspended matter and the agglomerating precipitating of colloid in water.
10. shield soil processing method according to claim 9, which is characterized in that the coagulant used is aluminium salt and molysite Mixture.
CN201910289280.5A 2019-04-11 2019-04-11 A kind of shield soil processing method Pending CN110092567A (en)

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CN110563296A (en) * 2019-10-11 2019-12-13 王川宽 mud separation method and system for realizing circulation by using same
CN111450988A (en) * 2020-04-10 2020-07-28 厦门焕金建筑垃圾资源化处置有限公司 Washed sand processing production line

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Publication number Priority date Publication date Assignee Title
CN110563296A (en) * 2019-10-11 2019-12-13 王川宽 mud separation method and system for realizing circulation by using same
CN111450988A (en) * 2020-04-10 2020-07-28 厦门焕金建筑垃圾资源化处置有限公司 Washed sand processing production line

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