CN108380659A - Maintenance process suitable for Polluted Soil in situ chemical oxidation reparation - Google Patents
Maintenance process suitable for Polluted Soil in situ chemical oxidation reparation Download PDFInfo
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- CN108380659A CN108380659A CN201810088605.9A CN201810088605A CN108380659A CN 108380659 A CN108380659 A CN 108380659A CN 201810088605 A CN201810088605 A CN 201810088605A CN 108380659 A CN108380659 A CN 108380659A
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- injection
- steel pipe
- maintenance
- soil
- monitoring unit
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Links
- 239000002689 soil Substances 0.000 title claims abstract description 101
- 238000012423 maintenance Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 39
- 230000008569 process Effects 0.000 title claims abstract description 31
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 30
- 230000003647 oxidation Effects 0.000 title claims abstract description 26
- 239000000126 substance Substances 0.000 title claims abstract description 23
- 238000002347 injection Methods 0.000 claims abstract description 105
- 239000007924 injection Substances 0.000 claims abstract description 105
- 239000003814 drug Substances 0.000 claims abstract description 75
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 56
- 239000010959 steel Substances 0.000 claims abstract description 56
- 238000012544 monitoring process Methods 0.000 claims abstract description 42
- 238000003756 stirring Methods 0.000 claims abstract description 42
- 239000012190 activator Substances 0.000 claims abstract description 31
- 230000008439 repair process Effects 0.000 claims abstract description 16
- 239000013589 supplement Substances 0.000 claims abstract description 9
- 230000008901 benefit Effects 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 239000000523 sample Substances 0.000 claims description 29
- 239000000243 solution Substances 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000011068 loading method Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 7
- 238000003892 spreading Methods 0.000 claims description 5
- 230000007480 spreading Effects 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 2
- 229940079593 drug Drugs 0.000 claims description 2
- 235000011888 snacks Nutrition 0.000 claims 1
- 229940126680 traditional chinese medicines Drugs 0.000 claims 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 20
- 238000010276 construction Methods 0.000 description 12
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 8
- 238000005086 pumping Methods 0.000 description 8
- 238000003971 tillage Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 239000007921 spray Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000001994 activation Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 238000007373 indentation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000003900 soil pollution Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000005527 soil sampling Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000012028 Fenton's reagent Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000003895 groundwater pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000000447 pesticide residue Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of maintenance processes suitable for Polluted Soil in situ chemical oxidation reparation, include the following steps：It is in latticed maintenance monitoring unit to be marked off several in the repair coverage after the completion of dosing stirring in situ；In maintenance processes, the monitoring of pH value is carried out to the soil body in each maintenance monitoring unit；Using the pH value monitoring result in the maintenance monitoring unit as foundation, injection point is set at the central point of the maintenance monitoring unit and four corner locations and is inserted into injection steel pipe, adds alkali-activator into the soil body of respective depth through the injection steel pipe；And so on, it is sequentially completed the maintenance of the soil body in each maintenance monitoring unit.It is an advantage of the invention that：Maintenance process is simple and easy to operate, by monitoring the pH value of the soil body in each maintenance monitoring unit in real time, to understand oxidation reaction process, alkali-activator is added according to monitoring result supplement, to improve the utilization rate of each medicament, and improve the removal efficiency for organic pollution.
Description
Technical field
The invention belongs to remediation contaminated soil technical fields, and in particular to one kind is repaiied suitable for Polluted Soil in situ chemical oxidation
Multiple maintenance process.
Background technology
With the industrialized fast development in China, soil environment is constantly endangered by various pollutions.Have in industrial production
Row is stolen in the evaporating, emitting, dripping or leaking of liquid or gas of malicious harmful substance, sewage, house refuse is stacked and toppled over, agrochemical uses and pesticide residue is to cause
The main cause of soil pollution.Soil pollution not only endangers ecological environment security, it is also possible to influence health through a variety of ways.Companion
As the development ＆ construction in cities and towns and the promulgation of every regulation are implemented, the demand that contaminated soil remediation is administered will be increasing.
At present Physical, chemical method, biology are broadly divided into according to Principles for the repairing and treating technology of contaminated soil
Method and combination method, specific recovery technique type is more, including the extracting of solidification and stabilization, Soil leaching, gas phase, thermal desorption, oxygen
Change in situ and microbial degradation reparation etc..Chemical oxidation reparation short, quick, at low cost and high treating effect with the required period
The advantages that, just developing into most potential one of the method for soil and groundwater pollution amelioration.It can be divided into original according to disposal site
Position chemical oxidation reparation is repaired with the maintenance of dystopy chemistry.In situ chemical oxidation technology takes specific technological means to note oxidant
Enter in soil, or is directly added into oxidant and is stirred by machinery.The oxidant that chemical oxidization method uses includes permanganic acid
Potassium（K2MNO4）, Fenton reagent, O3And persulfate（S2O8 2-）.Sodium peroxydisulfate is common oxygen in chemical oxidation recovery technique
Agent has preferable water-soluble and stability, activated（Alkali activation, thermal activation, transition metal activation）After can with it is most of
Organic pollution is to achieve the purpose that degradation removal.
The Engineering Projects of most of in situ chemical oxidations be mostly sodium hydroxide is added to adjust after soil pH reaches 10~12, then
It conveys sodium peroxydisulfate and carries out stir in situ, after the completion overlay film maintenance in situ.After sodium peroxydisulfate activation the free radical that generates with it is organic
Pollutant reaction is very fast, and in activation process, the OH in soil media-Constantly it is consumed, the pH conditions in environment tend to be neutral,
Oxidation reaction tends to stop, it is understood that there may be having part sodium peroxydisulfate not react completely in the soil body, or low to the removal rate of pollutant
The problems such as.
Invention content
According to the deficiencies of the prior art described above, It is an object of the present invention to provide one kind being suitable for Polluted Soil in-situ chemical
The maintenance process repaired is aoxidized, which understands oxidation by monitoring each pH value for conserving the soil body in monitoring unit in real time
The process of reaction supplements alkali-activator according to monitoring result, to improve the removal efficiency for organic pollution.
The object of the invention realization is completed by following technical scheme：
A kind of maintenance process suitable for Polluted Soil in situ chemical oxidation reparation, it is characterised in that the maintenance process includes following
Step：It is in latticed maintenance monitoring unit to be marked off several in the repair coverage after the completion of dosing stirring in situ；It is conserving
In the process, the monitoring of pH value is carried out to the soil body in each maintenance monitoring unit；With the pH value prison in the maintenance monitoring unit
Survey result is foundation, and injection point is arranged at the central point of the maintenance monitoring unit and four corner locations and is inserted into injection
Steel pipe adds alkali-activator into the soil body of respective depth through the injection steel pipe；And so on, it is sequentially completed each described
Conserve the maintenance of the soil body in monitoring unit.
It is to each method for conserving soil body progress pH value monitoring in monitoring unit：Respectively in the maintenance monitoring unit
Central point and four corner points positions at be arranged sample point, with 10-14 hours for sampling interval, in each sample point
Soil sampling test is carried out, the sampling interval depth in the sample point is 0.8-1.2m.
If the pH value monitoring data at the sample point are less than 10, alkali-activator is carried out by the injection steel pipe
Add supplement；If the pH value monitoring data at the sample point are between 10-12, the throwing without alkali-activator
Add supplement.
The alkali-activator is sodium hydroxide solution.
The addition method of the alkali-activator is：（1）By the injection steel pipe for being evenly equipped with several medicine outlet holes be pressed into
First order depth in the injection point；One tube sealing lid is set in the injection steel pipe upper port so that the injection steel pipe is constituted
The alkali-activator is pumped into the closed injection steel pipe and is added to first through each medicine outlet hole by airtight cavity
In the soil body in grade depth bounds；（2）The tube sealing lid is dismantled, using injection steel pipe described in connecting tube group spreading and is pressed into institute
The second level depth in injection point is stated, it, will by the upper port of the closed installation of the tube sealing lid under dismounting to the connecting tube group
The alkali-activator is pumped into the injection steel pipe to carry out adding in the depth bounds of the second level；（3）By step（2）Into
Row reciprocating operation is sequentially completed the injection reparation in depth bounds at different levels in the injection point by injection steel pipe described in spreading.
The front end of the injection steel pipe is connected with circular cone probe, and the upper diameter of the circular cone probe is more than the injection
The diameter of steel pipe.
The tube sealing, which covers, is provided with medicine-pouring hole and gas vent, and the medicine-pouring hole is through loading hose with booster pump and medicament
Agitator is connected, and pressure controller and flow control meter are provided on the booster pump.
The connecting tube group includes at least one section joint steel pipe, is used between the adjacent joint steel pipe detachable
Screw connection structure.
Before entering maintenance processes, the original position dosing stirring includes the following steps：（1）Construction area is drawn in the plane
Be divided into it is several in latticed reparation unit, upper pollution soil layer and lower pollution soil layer are divided into depth；（2）In the reparation
Cell surface open channels, and along the filling washed off soil of groove progress surfactant solution, to penetrate into the Polluted Soil of deep
Solubilising；（3）Excavate the upper pollution soil layer in the reparation unit using digging machine, and using in shallow-layer stir in situ equipment
Stir injector head in the lower pollution soil layer in Stirring Polluted Soil while spray alkali-activator with by pH value adjustment to 10-
Between 12；（4）Using the stirring injector head in the lower pollution soil layer in Stirring Polluted Soil while spray oxidation repair
Medicament is to repair Polluted Soil；（5）The upper pollution soil layer is backfilled using the digging machine, repeats step（3）With（4）, complete
At the alkali-activator in the upper pollution soil layer adding and stirring for medicament is repaired with oxidation；（6）According to step（3）-（5）,
It is sequentially completed each dosing in situ stirring for repairing unit.
It is an advantage of the invention that：Maintenance process is simple and easy to operate, by monitoring the soil body in each maintenance monitoring unit in real time
PH value adds alkali-activator, to improve the utilization of each medicament to understand oxidation reaction process according to monitoring result supplement
Rate, and improve the removal efficiency for organic pollution.
Description of the drawings
Fig. 1 is the structural schematic diagram of middle-shallow layer stir in situ equipment of the present invention；
Fig. 2 is the front view of middle-shallow layer stir in situ equipment of the present invention；
Fig. 3 is the structural schematic diagram that native cutterhead is cut in rotary tillage in the present invention；
Fig. 4 is the schematic diagram that the distribution Y-shaped in the plane of native cutterhead is cut in three groups of rotary tillages in the present invention；
Fig. 5 is the division floor map for respectively repairing unit in the present invention in construction area；
Fig. 6 is the construction procedure schematic diagram of in-situ immobilization maintenance process in the present invention；
Fig. 7 is the injection steel-tube construction schematic diagram that connecting tube group is equipped in the present invention；
Fig. 8 is the injection steel-tube construction schematic diagram that connecting tube group is not installed in the present invention；
Fig. 9 is the flow diagram for adding alkali-activator in the present invention in injection point depth at different levels using injection steel pipe.
Specific implementation mode
The feature of the present invention and other correlated characteristics are described in further detail by embodiment below in conjunction with attached drawing, with
Convenient for the understanding of technical staff of the same trade：
Such as Fig. 1-9, label 1-85 is respectively in figure：
Car body 1, crawler type traveling pedestal 11, vehicle frame 12, power plant 13, first mechanical arm 14, the first hydraulic telescopic rod 15,
Two mechanical arms 16, the second hydraulic telescopic rod 17, front end connector 18, third mechanical arm 19；Injection stores pumping installations 2, medicament
Warehouse 21, medicament warehouse 22, crawler type traveling pedestal 23, injecting gage probe 24, flow control valve 25, pressure controller
26, high-pressure pump 27；Injection pipeline 3, flexible conduit 31, injection tube chamber 32；Stirring injector head 4, rotary tillage cut native cutterhead 41, medicament spray
Penetrate first 42, medicament heating device 43, pressue device 44, rotating device 45, cutterhead 46, cutting tip 47, fastening bolt 48；Construction
Unit 53, upper pollution soil layer 54, lower pollution soil layer 55, sample point 52, are repaired at injection point 51 in region 5；Digging machine 6；Circular cone is popped one's head in
71, injection steel pipe 72, connecting tube group 73, tube sealing lid 74, medicine-pouring hole 75, gas vent 76, joint steel pipe 77, connection screw thread 78, go out
Medicine hole 79a, block-resistant protection boots 79b, loading hose 81a, loading hose 81b, flow control meter 82, pressure controller 83,
Booster pump 84, medicament agitator 85.
Embodiment：As shown in figs 1-9, the present embodiment more particularly to a kind of suitable for Polluted Soil in situ chemical oxidation reparation
Maintenance process is mainly concerned with dosing whipping process in situ and maintenance processes later, specifically includes following steps：
【Dosing stirring in situ】Referring to Fig. 1-6
（1）Before stirring in situ, clear table is carried out to the construction area 5 in place using digging machine 6, while loose to topsoil progress,
Sink to creating suitable soil condition for shallow-layer stir in situ equipment.
（2）As shown in figure 5, will be divided into the range of construction area 5 several is in latticed reparation unit 53, in this reality
It applies in example, each specification for repairing unit 53 is 4m * 4m, uses timber or lime as the division mark between each reparation unit 53
Know.
（3）Excavated in length and breadth in reparation unit 53 to be onstructed and irrigate surfactant after the groove of 30cm depths, and under ooze
Soil carries out solubilising, and surfactant herein is specifically using the anionic and nonionic surfactant of a concentration of 20g/L, surface
The dosage of the activating agent dosage that medicament is repaired in used oxidation after is determined, and in the present embodiment, surface is lived
Property agent add measure oxidation repair dosing 10%（Mass percent）；Solubilising after a certain period of time, as shown in figure 5, will
It repairs the pollution soil body in unit 53 to be divided into upper and lower two layers, i.e., upper pollution soil layer 54 and lower pollution soil layer 55, the thickness of the two
Degree is to be excavated using digging machine 6 and remove upper pollution soil layer 54 between 0.5-1.0m.
（4）The shallow-layer stir in situ equipment that installation is complete is moved at 53 position of reparation unit to be onstructed later；This
Shallow-layer stir in situ equipment body in embodiment is the car body 1 with mechanical arm, and stirring is equipped in the front end of mechanical arm
Injector head 4 is disposed with injection pipeline 3 along mechanical arm extending direction, and the one end connection injection of injection pipeline 3 stores pumping installations
2 repair medicament for pumping, and the other end connection stirring injector head 4 of injection pipeline 3, stirring injector head 4 can be in its indentation
The pollution soil body be stirred during outward injection repair medicament so that repair medicament and contaminated soil can come into full contact with
Repair Polluted Soil.
As shown in Figure 1, 2, car body 1 is by crawler type traveling pedestal 11, vehicle frame 12, mechanical arm and power plant 13 this four
Divide and is formed, wherein：（a）Crawler type traveling pedestal 11 for drive entire car body 1 move traveling, convenient for different landform with
And walk in environment, to improve working efficiency；（b）Connected by rotating mechanism between vehicle frame 12 and crawler type traveling pedestal 11
It connects, under the driving of rotating mechanism, vehicle frame 12 can carry out 360 ° of rotation；（c）Mechanical arm specifically include first mechanical arm 14,
Second mechanical arm 16 and third mechanical arm 19, one end of first mechanical arm 14 is hingedly fixed on vehicle frame 12, the other end and
Two mechanical arms 16 are rotatablely connected, and second mechanical arm 16 is then constituted through front end connector 18 and third mechanical arm 19 and is coaxially disposed；
First hydraulic telescopic rod 15 is installed in first mechanical arm 14 for driving second mechanical arm 16 to be rotated, in addition, the
Second hydraulic telescopic rod 17 is installed for driving front end connector 18 and third mechanical arm 19 to stretch on two mechanical arms 16
Movement；（d）Power plant 13 is mounted on vehicle frame 12, for converting the mechanical energy of diesel engine to hydraulic energy and being supplied to
Each component on car body 1, including crawler type traveling pedestal 11, the rotating mechanism under vehicle frame 12, the first hydraulic telescopic rod 15, second
Hydraulic telescopic rod 17 and stirring injector head 4.
As shown in Figure 1, 2, injection storage pumping installations 2 includes crawler type traveling pedestal 23 and is arranged in crawler type traveling
Medicament warehouse 21 on pedestal 23 and medicament warehouse 22；Wherein, medicament warehouse 21 and medicament warehouse 22 are connected by injection pipeline 3
In different types of reparation medicament on car body 1, can be stored in medicament warehouse 21 and medicament warehouse 22 and pumped outward, shape
It can be cylindrical or be rectangle, the size of volume is determined according to engineering practice；Each medicament warehouse corresponds to respectively
It is connected with an injection pipeline 3, at interface position of the injection pipeline 3 with 21/ medicament warehouse 22 of medicament warehouse, is sequentially installed with note
Agent gage probe 24, flow control valve 25, high-pressure pump 27, pressure controller 26, among this, injecting gage probe 24 is used
In detecting and controlling the medicament flow exported outward, high-pressure pump 27 is used to extract the medicament in 21/ medicament warehouse 22 of medicament warehouse
Solution simultaneously pumps outward, and certain injection pressure is provided for medicament, and flow control valve 25 and pressure controller 26 are then adjusted
The transmission speed of medicament.
As shown in Figure 1, 2, injection pipeline 3 is made of flexible conduit 31, injection tube chamber 32, wherein flexible conduit 31 uses
Corrosion resistant hose materials are simultaneously arranged along the extension direction of first mechanical arm 14 and second mechanical arm 16, to make flexible conduit 31
It can rotate with first mechanical arm 14 and second mechanical arm 16, length is selected upper with certain redundancy；And injection tube chamber
32 axial directions along third mechanical arm 19 open up, the one end connection injection storage pumping installations 2 of flexible conduit 31, the other end
Then it is connected with injection tube chamber 32, there is medicament warehouse 21 and medicament warehouse by the storage pumping installations 2 of injection in this present embodiment
22, therefore the quantity of flexible conduit 31 is two, the flexible conduit 31 connected on each medicament warehouse, which crosses, collaborates to medicine-pouring pipe
In chamber 32, injection is stored the reparation medicament in pumping installations 2 and is delivered in injection tube chamber 32 and through its end by flexible conduit 31
Stirring injector head 4 outward spray.
As shown in Figure 1,2,3, 4, stirring injector head 4 is arranged in the front end of third mechanical arm 19, by centrally located medicine
Agent injector head 42 and three groups of rotary tillages on the outside of it are cut native cutterhead 41 and are formed, and three groups of rotary tillages cut native cutterhead 41 in the plane
Y-shaped distribution；Wherein, centrally located medicament ejector head 42 is connected with the injection tube chamber 32 in third mechanical arm 19,
Junction is provided with medicament heating device 43 and pressue device 44, and medicament heating device 43 can be before medicament injects the soil body
Medicament implantation temperature is improved to improve reaction efficiency；The cleaning agent jet flow direction of medicament ejector head 42 is respectively directed to be located on the outside of it
41 direction of native cutterhead is cut in three groups of rotary tillages；As shown in figure 3, the rotary tillage in the present embodiment cuts native cutterhead 41 including cutterhead 46 and along it
Several cutting tips 47 that outer edge is spaced apart, cutting tip 47 are fixed on through fastening bolt 48 on cutterhead 46, cutterhead 46
Rotation driving is completed by rotating device 45.During the cutting stirring soil body of native cutterhead 41 is cut in rotary tillage, medicament ejector head 42 will
Injection can be synchronized and repair medicament, to enable reparation medicament to be sufficiently mixed with Polluted Soil body.
（5）As shown in Figure 1,5, shallow-layer stir in situ equipment is being moved to at 53 position of reparation unit to be onstructed it
Afterwards, second mechanical arm 16, third mechanical arm 19 and stirring injector head 4 thereon is made to keep the vertically state perpendicular to ground.
（6）Medicament and alkali-activator are repaired according to the pollutant type in construction area 5, pollution level configuration oxidation,
And it is separately added into the medicament warehouse 21 and medicament warehouse 22 in above-mentioned shallow-layer stir in situ equipment；Wherein：
Oxidation repairs medicament using sodium peroxydisulfate solution（A concentration of 400g/L）, dosage is soil quality to be repaired
1%-3%, specifically, the dosage in soil heavily contaminated region is the 3% of soil quality to be repaired, and in the lighter Polluted area of soil
Dosage be soil quality to be repaired 1-2%；
Alkali-activator is using sodium hydroxide solution（A concentration of 500g/L), design quantity takes sodium hydroxide solution dosage
20%（Mass percent）.
（7）As shown in figures 1 to 6, the second hydraulic telescopic rod 17 driving third mechanical arm 19 controlled in second mechanical arm 16 is stretched
It is long, to drive stirring injector head 4 to be pressed into Stirring in lower pollution soil layer 55, during indentation, stir injector head 4
Spray sodium hydroxide solution outward with certain pressure carries out alkaline adjusting to lower pollution soil layer 55 simultaneously；In addition, being sprayed in stirring
Penetrate first 4 gradually above carry during, by stir 4 high speed of injector head rotation so that sodium hydroxide solution is come into full contact with soil,
Realize sufficient mixing；It repeats stirring to sink, is promoted, stirred evenly while stirring, until complete the reparation unit 53 of 16 ㎡
Working area；Sampling and testing repairs the pH value of the lower pollution soil layer 55 in unit 53, reaches the pH value of 10-12；For whole
In a reparation unit 53（Including upper pollution soil layer 54 and lower pollution soil layer 55）The dosage for the first time of sodium hydroxide solution should be
The half of sodium hydroxide solution design quantity, i.e., when being repaired for the first time to the pollution soil body entirely repaired in unit 53, hydrogen
The dosage of sodium hydroxide solution accounts for the 10% of sodium peroxydisulfate solution usage；
During medicament ejector, high-pressure pump 27 extracts sodium hydroxide solution out from medicament warehouse 22, is pumped through injection pipeline 3
It send to the medicament ejector head 42 of stirring injector head 4, under pressure, liquid medicine is from medicament ejector head 42 with certain
In pressure injection to the soil body, alkaline adjusting is carried out to the soil body；During conveying medicament, injecting gage probe is adjusted in real time
24 to control the injection rate of sodium hydroxide solution, while by adjusting flow control valve 25 and pressure controller 26 to control
The transmission speed of medicament.
（8）As shown in figures 1 to 6, the injection pipeline 3 of sodium hydroxide solution is closed, the injection pipeline of sodium peroxydisulfate solution is opened
3；Repeat step（7）In lower pollution soil layer 55 of the step into the reparation unit 53 in inject sodium peroxydisulfate solution, and utilize
It is uniformly mixed by stirring injector head 4 with the soil body, and sodium peroxydisulfate solution occurs chemical reaction with the contaminated soil body and repaiied to it
It is multiple.
（9）As shown in fig. 6, after the reparation of lower pollution soil layer 55 in the reparation unit 53 to be done, using digging machine 6 to
It repairs and pollutes soil layer 54 in unit 53 in backfill, repeat the above steps（7）、（8）, the reparation of soil layer 54 is polluted in completion, i.e., it is complete
At the entire repair for repairing unit 53；
（10）After the reparation to be done for repairing unit 53, closes high-pressure pump 27 and stop pumping medicament into injection pipeline 3；Later
Control second mechanical arm 16 on the second hydraulic telescopic rod 17 shrink to drive third mechanical arm 19 and thereon stirring injection
The first 4 lift-off soil body；
（11）As shown in figures 1 to 6, according to step（7）-（10）, and so on, it is sequentially completed each injection stirring for repairing unit 53
Work, the Polluted Soil after the completion of stirring are conserved in situ.
【Maintenance processes】Referring to Fig. 5, Fig. 7-9
（12）Maintenance in situ is carried out after completing dosing Beater operator in situ above-mentioned and making, is marked off in construction area 5 several
In latticed maintenance monitoring unit, substantially, each maintenance monitoring unit continues to use the zoned format of original reparation unit 53；
（13）PH value sample point 52 is respectively set in the central point and four corner locations for repairing unit 53, was to take with 12 hours
Sample time interval carries out soil sampling test, it should be noted that the sampling interval in sample point 52 in each sample point 52
Depth is 1m；
（14）According to aforementioned obtained pH value monitoring data, determine a need for carrying out further injection；If sample point 52
When the soil body pH value at place is between 10-12, then no longer carry out alkali-activator adds supplement；If the soil body PH at sample point 52
When value is less than 10, then carry out alkali-activator adds supplement；
（15）Injection point 51 is respectively set in the central point and four corner locations for repairing unit 53, and in each injection point 52
That is inserted into 72 progress alkali-activator of injection steel pipe adds supplement, and in maintenance processes, alkali-activator still uses hydroxide
The addition number of sodium solution, alkali-activator is advisable for suitable 2-3 times, and the pH value of the soil body is finally controlled 11 or so；Injection steel pipe 72
Specific indentation step and the specific of alkali-activator add that steps are as follows：
15a）In each injection point 51, the depth at different levels for needing to carry out injection reparation are determined, such as in the present embodiment, the first order
Depth is 1 m, second level depth is 2 m, third level depth is that 3 m ..., n-th grade of depth is n m；
15b）The preparation of alkaline excitation agent solution is completed in medicament agitator 85, and by medicament agitator 85 through loading hose
81a is connected with 84 inlet of booster pump, and at the same time, the liquid outlet of booster pump 84 is through loading hose 81b on tube sealing lid 74
Medicine-pouring hole 75 be connected, to complete the preparation before injection；
15c）The assembly for carrying out injection steel pipe 72 links together circular cone probe 71 with the combination of single-unit injection steel pipe 72, injection
It is evenly equipped with several medicine outlet hole 79a on the wall surface of steel pipe 72, and anti-blocking guarantor is provided on the rising wood tube wall face of each medicine outlet hole 79a
Boots 79b is protected, block-resistant protection boots 79b can prevent aperture from generating blocking；
Single-unit injection steel pipe 2 and its circular cone probe 1 are inserted into the in the soil body in each injection point 51 using pressure pulling device later
Level deep, first order depth is selected as soil body superficial part 1m in the present embodiment；During being pressed into the soil body, since circular cone is popped one's head in
71 upper diameter is more than the diameter of injection steel pipe 72, therefore circular cone probe 71 will form the injection well head of larger hole diameter, to
It prevents the borehole wall periphery soil body from pressing on the tube wall and medicine outlet hole 79a of injection steel pipe 72, plays anti-blocking effect；
After injection steel pipe 72 is assigned in place, tube sealing lid 74 above-mentioned is torqued-up to injection steel pipe 72 using connection screw thread 78
In upper end tube nozzle；Space-closed in injection steel pipe 72 is formed airtight cavity by tube sealing lid 74, while in the effect of booster pump 84
Under, the injection pressure and medicament ejector effect in airtight cavity can be improved；Wherein, it is provided with injection at the center of tube sealing lid 74
Hole 75, medicine-pouring hole 75 are connected to through loading hose 81b with booster pump 84, and it is molten medicament can be injected into the tube chamber of injection steel pipe 72 with this
Liquid；It, can regular gas in discharge pipe in addition, be additionally provided with gas vent 76 on tube sealing lid 74；
15d）Booster pump 84 is opened by the alkaline excitation agent solution in medicament agitator 85 with certain injection pressure and injection stream
Amount is pumped to through loading hose 81 and medicine-pouring hole 75 in injection steel pipe 72；Under pump function, alkaline excitation agent solution is through note
Among each medicine outlet hole 79a of medicine steel pipe 72 uniformly sprays the injection soil body, alkaline excitation agent solution is the same as the over cure remained in the soil body
Acid sodium solution react, to improve first order depth sodium peroxydisulfate solution utilization rate, improve the removal of organic pollution
Efficiency；
15e）It waits for after reacting a period of time in the soil body of the alkali-activator in first order depth bounds, by tube sealing lid 74 from note
The port of medicine steel pipe 72 disassembles, and in the upper port screw-thread fit of injection steel pipe 72 installation connecting tube group 73, connecting tube group
73 should include at least a section joint steel pipe 77 selects the section of connecting tube group 73 according to the depth of required injection in the construction process
Section composing quantity, in the present embodiment, the practical one section joint steel pipe 77 of upper port installation in injection steel pipe 72, joint steel pipe 77
Both ends have connection screw thread 78；
Later, the tube sealing lid 74 disassembled before is screwed again to the upper port of joint steel pipe 77, tube body is closed
At the same time intraluminal air can be suitably discharged by gas vent 76 by constituting airtight cavity；It will be noted using pressure pulling device again
At the indentation to underground second level depth location of medicine steel pipe 72, and repeat step（15d）In injection step, in second level depth model
It encloses and carries out adding for alkali-activator in the interior soil body；
15f）Repeat step（15d）With（15e）, by spreading connecting tube group 73, it is sequentially completed depth locations at different levels in each hole（The
Three-level depth, fourth stage depth ...）Alkali-activator injection；
15g）After a period of time, sampling and testing, the injection zone for not reaching reparation target continues to inject work for reaction
Make, until completing to pull out injection steel pipe 72 and connecting tube group 73 after repairing target.
Claims (8)
1. a kind of maintenance process suitable for Polluted Soil in situ chemical oxidation reparation, it is characterised in that the maintenance process include with
Lower step：It is in latticed maintenance monitoring unit to be marked off several in the repair coverage after the completion of dosing stirring in situ；It is supporting
During shield, the monitoring of pH value is carried out to the soil body in each maintenance monitoring unit；With the pH value in the maintenance monitoring unit
Monitoring result is foundation, and injection point is arranged at the central point of the maintenance monitoring unit and four corner locations and is inserted into note
Medicine steel pipe adds alkali-activator into the soil body of respective depth through the injection steel pipe；And so on, it is sequentially completed each institute
State the maintenance of the soil body in maintenance monitoring unit.
2. a kind of maintenance process suitable for Polluted Soil in situ chemical oxidation reparation according to claim 1, feature exist
The method of soil body progress pH value monitoring is in each maintenance monitoring unit：Respectively at the center of the maintenance monitoring unit
Setting sample point is taken with 10-14 hours for sampling interval in each sample point at point and four corner points positions
Soil sample is tested, and the sampling interval depth in the sample point is 0.8-1.2m.
3. a kind of maintenance process suitable for Polluted Soil in situ chemical oxidation reparation according to claim 2, feature exist
If the pH value monitoring data at the sample point are less than 10, adding for alkali-activator is carried out by the injection steel pipe
Supplement；If the pH value monitoring data at the sample point are between 10-12, benefit is added without alkali-activator
It fills.
4. a kind of maintenance process suitable for Polluted Soil in situ chemical oxidation reparation according to claim 1, feature exist
In the alkali-activator be sodium hydroxide solution.
5. a kind of maintenance process suitable for Polluted Soil in situ chemical oxidation reparation according to claim 1, feature exist
It is in the addition method of the alkali-activator：（1）The injection steel pipe for being evenly equipped with several medicine outlet holes is pressed into the note
First order depth in snack made with traditional Chinese medicines；One tube sealing lid is set in the injection steel pipe upper port so that the injection steel pipe constitutes closed chamber
The alkali-activator is pumped into the closed injection steel pipe and is added to first order depth through each medicine outlet hole by body
In the soil body in range；（2）The tube sealing lid is dismantled, using injection steel pipe described in connecting tube group spreading and is pressed into the injection
Second level depth in point, by the upper port of the closed installation of the tube sealing lid under dismounting to the connecting tube group, by the alkali
Property exciting agent is pumped into the injection steel pipe to carry out adding in the depth bounds of the second level；（3）By step（2）It carries out reciprocal
Operation, by injection steel pipe described in spreading, is sequentially completed the injection reparation in depth bounds at different levels in the injection point.
6. a kind of maintenance process suitable for Polluted Soil in situ chemical oxidation reparation according to claim 1 or 5, feature
It is that the front end of the injection steel pipe is connected with circular cone probe, the upper diameter of the circular cone probe is more than the injection steel pipe
Diameter.
7. a kind of maintenance process suitable for Polluted Soil in situ chemical oxidation reparation according to claim 5, feature exist
It is covered in the tube sealing and is provided with medicine-pouring hole and gas vent, the medicine-pouring hole is through loading hose with booster pump and medicament agitator
It is connected, pressure controller and flow control meter is provided on the booster pump.
8. a kind of maintenance process suitable for Polluted Soil in situ chemical oxidation reparation according to claim 5, feature exist
Include at least one section joint steel pipe in the connecting tube group, is connected using detachable screw thread between the adjacent joint steel pipe
Binding structure.
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2018
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| JPH0985225A (en) * | 1995-09-20 | 1997-03-31 | Dowa Mining Co Ltd | Method for treating soil contaminated with heavy metals |
| CN105855288A (en) * | 2016-06-01 | 2016-08-17 | 上海岩土工程勘察设计研究院有限公司 | Mobile in-situ quick injection method for contaminated sites |
| CN106807736A (en) * | 2017-03-01 | 2017-06-09 | 北京建工环境修复股份有限公司 | A kind of soil and underground water solid phase shallow-layer stirring in situ chemical oxidation restorative procedure |
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