WO2017219792A1 - 土壤及地下水原位注入——高压旋喷注射原位修复系统及方法 - Google Patents
土壤及地下水原位注入——高压旋喷注射原位修复系统及方法 Download PDFInfo
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- WO2017219792A1 WO2017219792A1 PCT/CN2017/084472 CN2017084472W WO2017219792A1 WO 2017219792 A1 WO2017219792 A1 WO 2017219792A1 CN 2017084472 W CN2017084472 W CN 2017084472W WO 2017219792 A1 WO2017219792 A1 WO 2017219792A1
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- Prior art keywords
- injection
- high pressure
- situ
- soil
- repair
- Prior art date
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- 238000002347 injection Methods 0.000 title claims abstract description 225
- 239000007924 injection Substances 0.000 title claims abstract description 225
- 230000008439 repair process Effects 0.000 title claims abstract description 103
- 239000002689 soil Substances 0.000 title claims abstract description 81
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 80
- 239000003673 groundwater Substances 0.000 title claims abstract description 66
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- 239000003814 drug Substances 0.000 claims description 33
- 230000008569 process Effects 0.000 claims description 18
- 229940079593 drug Drugs 0.000 claims description 17
- 238000013461 design Methods 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 11
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Images
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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/18—Pipes provided with plural fluid passages
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
- C02F1/685—Devices for dosing the additives
- C02F1/686—Devices for dosing liquid additives
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
Definitions
- the invention relates to an in-situ injection of soil and groundwater - a high pressure rotary injection injection in situ repair system and method, and belongs to the technical field of soil and groundwater in situ repair system and repair method.
- Soil and groundwater environment are important components of ecosystems.
- China's soil pollution has become increasingly serious.
- organic pollution and heavy metal pollution have become two important types of pollution, not only destroying the ecological environment itself, directly or Indirectly endangering the environment and human health and safety.
- volatile and semi-volatile organic pollutants and soluble heavy metals migrate to deep saturated regions (aquifers) in unsaturated regions (aeration zones), especially to groundwater resources, causing serious consequences.
- in situ repair the commonly used soil and groundwater remediation engineering technologies are divided into two types: in situ repair and ectopic repair. According to their repair methods, they can be divided into physical repair, chemical repair and bioremediation. Ectopic repair is likely to cause leakage and spread of pollutants due to excavation, transportation, remediation/disposal of contaminated soil, and extraction, temporary storage or in situ treatment of groundwater. And the disposal process needs to be strictly supervised, and the management requirements are high.
- the in-situ repair does not involve foundation excavation and support of deep foundation pits, foundation pit dewatering and water stop, etc., effectively avoiding secondary pollution and reducing the probability of occurrence of safety accidents.
- the in-situ remediation technology of soil and groundwater has been favored in China in recent years.
- In-situ chemical oxidation, in-situ chemical reduction, and in-situ microbial remediation technology refer to chemical reactions or biochemical reactions with pollutants by adding a repair agent (chemical oxidant, reducing agent, microbial preparation) to the underground environment.
- a repair agent chemical oxidant, reducing agent, microbial preparation
- this technology can simultaneously treat a variety of pollutants, high processing efficiency, of which microbial remediation technology is suitable For low concentration sites, chemical oxidation/reduction is generally not limited by contaminant concentrations.
- Commonly used reducing agents can repair pollutants such as halogenated hydrocarbons and heavy metals (hexavalent chromium) in soil and groundwater.
- Common oxidants such as persulfate, hydrogen peroxide, potassium permanganate, etc.
- Microbial preparations can repair organic pollutants such as benzene series and petroleum hydrocarbons in soil and groundwater.
- U.S. Patent No. 5,639,182 "Soil In-situ Remediation Method” relates to an in-situ soil agitation method which is equipped with a vertically driven impeller bit by means of a mobile crawler rig which enables in situ agitation of contaminated soil.
- the agitating drill bit is an integrated impeller bit, so the mixing depth is limited and the resistance is large.
- the application has certain limitations and is only suitable for the treatment of looser formations.
- In-situ drill bit direct injection is to inject the configured medicament into the polluted soil layer through the injection drill bit at a certain pressure and continuously mix and mix the contaminated soil and the oxidizing agent to repair the contaminated soil and groundwater.
- patent number US Two chemically oxidized in-situ drill injection repair systems are disclosed in U.S. Patent Application Serial No. U.S. Patent No. 6,006,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
- the injection pressure is insufficient (using natural flow or low pressure injection), and the formation conditions have a great influence on the injection effect. If the clay layer or the formation is not uniform, the agent cannot spread evenly, affecting the repair effect and even failing to complete the repair. The saturated layer soil is difficult to grout, the diffusion radius is small, and the applicable formation is limited, and the clay layer almost loses its diffusion effect.
- In-situ injection well injection is a chemical oxidation repair system that builds an injection well at a contaminated site and diffuses the oxidant at a certain pressure through the injection well screen into the contaminated soil layer to degrade the pollutant.
- U.S. Patent No. 2003/0069142 discloses a chemical oxidation injection well injection system which is provided with a baffle in front of a screen containing a solid powdered medicament, and the agent in the screen dissolves with groundwater. The flow direction is diffused to the target area by the deflector to repair contaminated soil and groundwater.
- US 2008/0174571 A1 discloses a chemically oxidized in-situ injection well repair technique for injecting hydrogen peroxide, ozone and compressed air into the ground through an injection well to remediate contaminated soil and groundwater.
- Wells for injection wells are currently used in the United States Geoprobe drilling rigs or domestic geological drilling rigs (such as 30 drilling rigs, car drilling), mostly using rotary or impact drilling methods, large-scale contaminated sites need a certain period of time to build wells.
- the existing high-pressure rotary jet pile foundation technology is a ground treatment construction technology. It is mainly used in the geotechnical field for water curtains, slope protection piles, etc., using a rotary jet drilling machine to form a hole and then descending into the jet drill pipe, passing through the nozzle in the underground.
- the high-pressure cement slurry is sprayed, and the solidified pile body or the water-stop curtain is formed by cutting the soil to achieve the function of foundation reinforcement or water stop.
- the application process of the above repair technology requires a series of in-situ repair systems and repair methods to achieve the dosage of the repair agent.
- the object of the present invention is to solve the problems of insufficient injection pressure, low injection efficiency, small diffusion radius of the medicament, and difficulty in ensuring the effect of the amount of grouting on the diffusion effect of the existing in situ repair system. Further, an in-situ injection of soil and groundwater is provided, which is a high-pressure rotary injection injection in situ repair system and method.
- In-situ injection of soil and groundwater - high pressure rotary injection injection in situ repair system including: dispensing station, dispensing station outlet valve, dispensing station outlet stainless steel quick joint, high pressure grouting pump inlet valve, high pressure grouting pump, high pressure injection Slurry pump outlet valve, high pressure grouting pipe, air compressor, air compressor outlet valve, compressed air pipe, rotary jet drilling machine, power head, high pressure water joint, high pressure water joint agent liquid flow inlet, high pressure water joint air flow inlet , second heavy pipe water flow joint, rotary drilling rig grouting drill pipe automatic lifting mechanism, high pressure jet drill pipe, high pressure injection triple drill pipe inner pipe, high pressure injection triple drill pipe outer pipe, chemical injection nozzle, air injection nozzle, hard An alloy block and a drill bit; an outlet valve of the dispensing station is installed at the outlet of the dispensing station, and an outlet valve of the dispensing station is connected by a stainless steel quick joint of the dispensing station and an inlet valve of the high pressure grouting pump, a high pressure grouting pump in
- the other end of the slurry pipe is connected with the high-pressure water joint agent liquid flow inlet; the lower part of the power head is equipped with a hoisting steel wire rope and a rotary drilling rig grouting drill pipe automatic lifting mechanism, and a high-pressure jet drill pipe is installed at the lower part of the high-pressure water joint.
- the high-pressure jet drill pipe is assembled by a high-pressure injection triple drill pipe inner pipe and a high-pressure injection triple drill pipe outer pipe.
- the high-pressure injection triple drill pipe has a chemical injection nozzle on the inner pipe, and the high-pressure injection triple drill pipe has an air injection on the outer pipe.
- the nozzle, the bottom end of the high-pressure jet drill pipe is equipped with a drill bit, and the drill bit is mounted with a hard alloy block;
- the high-pressure water joint agent liquid flow inlet is connected with the high-pressure injection triple drill pipe inner pipe, and the high-pressure water joint air flow inlet and the high pressure injection triple
- the outer pipe of the drill pipe is connected;
- the outlet of the air compressor is connected with air pressure
- the compressor outlet valve has one end of the compressed air line connected to the air compressor outlet valve, one end of the compressed air line is connected to the high pressure water joint air flow inlet, and the second heavy pipe water flow joint is connected with the high pressure water joint.
- Step 1 Place and lead:
- the cloth point parameters ensure that all the repair areas are covered within the diffusion radius of the medicament.
- the pilot hole drilling machine is placed at the center point of the injection point, and the air compressor is always turned on during the rotary impact drilling process.
- the air pressure of the air compressor is 0.7-0.8 MPa, and the hole is drilled by a pneumatic down-the-hole hammer impact rotary drilling method.
- the diameter of the injection point is 110 mm, the hole depth is 3 to 5 m, and the penetration is filled.
- the foundation of the soil hard layer or the original site concrete can be used. When the gravel layer breaks and collapses, the hole needs to be drilled into the hole to ensure the smooth drilling of the high-pressure injection drill pipe in the high-pressure injection stage;
- Step 2 In-situ injection of the repair agent - high-pressure jet injection:
- the high-pressure injection repair uses a double pipe: using gas and liquid fluid to spread the soil from bottom to top while spreading in the formation, so as to achieve sufficient mixing of the repairing agent with the soil and groundwater; after the jetting rod is drilled down to the maximum depth of design restoration Open the high-pressure grouting pump, spray the compressed air while spraying the high-pressure liquid flow, and rotate the drill pipe from the bottom to the top by the automatic lifting mechanism of the rotary jet drilling machine; after the chemical injection is applied to the top level of the repair design, the high-pressure injection is stopped.
- the slurry pump, the compressed air continues to be injected until the complete lifting of the drill to stop the supply of air; the air pressure of the air compressor of the medicament injection process is maintained at 0.7-0.8 MPa, the injection pressure of the high-pressure grouting pump is 25-30 Mpa, and the grouting flow rate is 20 ⁇ 120L/min, lifting speed: 5 ⁇ 20cm/min, the diffusion radius of the agent reaches 0.8 ⁇ 3.5m;
- Step 3 Monitoring of the late reaction of the drug:
- the repair system is simple in design, small in equipment and convenient to move. It is superior to other technologies such as in-situ heating, thermal desorption or soil leaching. It requires complex design or special equipment, such as necessary exhaust or wastewater system. Repair costs are lower than in situ heating, thermal desorption and other technologies. The repair efficiency of the in-situ system and the removal of contaminants can be optimally achieved.
- the invention adopts high-pressure injection process of gas and liquid double tube, on the one hand, the injection pressure is large (25-30 Mpa), and currently The common maximum pressure of drill bit injection is only 18Mpa, and the diffusion radius of the small injection agent is relatively small and the diffusion is uneven.
- the single-tube injection is more serious in the shallow groundwater remediation site.
- the effect of the injection of the repairing agent liquid flow assisting the high-pressure air flow makes the diffusion effect of the repairing agent in the soil and groundwater environment significantly improved, and the diffusion radius is significantly increased.
- the high-pressure injection of the drill bit is suitable for the formation.
- the present invention can overcome the defects of the single-tube injection method of the drill bit, such as small diffusion radius, severe slurry return, and low injection efficiency.
- the application scope of the present invention is greatly expanded as compared with the well construction injection technology.
- the prior art is only applicable to medium to high permeability formations (such as fine sand, medium coarse sand, etc.), and the application of the present invention can extend the range to low to medium permeability formations (such as silty clay, silt). , silty clay, clay layer).
- the injection well technology is suitable only for the unsaturated layer or the groundwater level deeper because the injection pressure is small, and the invention can be applied to the single soil pollution, the combined pollution of soil and groundwater (saturated layer), the separate groundwater pollution, etc.
- the maximum grouting amount and the slurry return problem in the in-situ injection process greatly improve the injection efficiency.
- the invention replaces the injection well by means of injection point (drilling), on the one hand, the construction cost is saved, and on the one hand, there is no waste facility such as PVC well after the repair, and the land can be put into use without cleaning the site after completing the injection of the medicament. .
- the single hole per shot of the invention has a large injection volume, and generally one round of injection (using a double injection process if necessary) can meet the engineering design requirement, and the injection well is added with intermittent multiple injections, so the repair period of the injection well repair method is relatively Longer.
- the use of the present invention the use of pneumatic impact rotary drilling into the hole in the piloting stage, relative to the construction of the injection well
- Wells currently use American Geoprobe drilling rigs or domestic geological drilling rigs (such as 30 drilling rigs, automobile drilling rigs, etc.), and most of them use rotary or impact drilling methods. It takes a certain period for large-scale contaminated sites to build wells.
- the introduction of air flow during the drilling process on the one hand improves the construction efficiency and reduces the cost.
- the introduction of air flow is beneficial to open the soil pores of the miscellaneous fill layer, which provides favorable conditions for the uniform diffusion of the medicament for injection of the unsaturated layer in the later period.
- the method of introducing the hole has lower cost and lower cost, and provides time guarantee for the subsequent in-situ injection-continuous construction of the high-pressure jet injection operation.
- the repair method is top-down, can not solve the problem of repair of the sandwich layer
- the invention uses fixed depth injection repair, can solve the stirring technology disturbing the upper non-polluted parts, resulting in The secondary pollution is serious and the defects such as bearing capacity of the foundation are damaged.
- the energy consumption of mechanical agitation is much greater than the energy consumption of the device using the airflow and liquid flow for effective diffusion.
- the fixed depth repair solves the problem of soil and groundwater repair in the sandwich layer, and maintains the original bearing capacity after construction, especially for the economic advantages of sand layer soil and groundwater remediation and high efficiency construction.
- Fig. 1 is a schematic view showing the in-situ injection of soil and groundwater in situ according to the invention, a high pressure rotary injection injection in situ repair system.
- Fig. 2 is an enlarged view of a portion A of Fig. 1.
- Fig. 3 is a cross-sectional view taken along line B-B of Fig. 2;
- Fig. 4 is a cross-sectional view taken along line C-C of Fig. 2;
- the reference numerals are 1 for the dispensing station, 2 for the dispensing station outlet valve, 3 for the dispensing station outlet stainless steel quick coupling, 4 for the high pressure grouting pump inlet valve, 5 for the high pressure grouting pump, and 6 for the high pressure grouting pump Pressure gauge, 7 is high pressure grout pump
- the outlet valve, 8 is a high pressure grouting pipe (and liquid flow injection direction)
- 9 is a fresh air inlet of the air compressor
- 10 is an air compressor inlet valve
- 11 is an air compressor
- 12 is an air compressor pressure gauge
- 13 is Air compressor outlet valve
- 14 is compressed air pipeline (and air injection flow direction)
- 15 is rotary jet drilling machine
- 16 is power head
- 17 high pressure water joint
- 18 high pressure water joint chemical liquid flow inlet
- 19 is high pressure water Joint air flow inlet
- 20 is the second heavy pipe water flow joint (closed)
- 21 is the rotary drilling rig grouting drill pipe automatic lifting mechanism
- 22 is the high pressure jet drill pipe (triple pipe)
- 31 is an air jet stream
- 32 is a cemented carbide block
- 33 is a drill bit
- 34 is a chemical permeation diffusion zone
- 35 is a chemical splitting agitation zone
- 36 is a drug diffusion direction
- 37 is a miscellaneous fill layer
- 38 is a silty substance.
- Clay layer, 39 is fine sand layer (aquifer)
- 40 is silty clay layer
- 41 is ground
- R1 is the splitting stir radius
- R2 is the penetration diffusion radius (R1+R2 is the effective diffusion radius of the agent).
- an in-situ injection of soil and groundwater includes: a dispensing station, a dispensing station outlet valve 2, and a dispensing station outlet stainless steel.
- the pump outlet 5 is connected to a high-pressure injection pump outlet valve 7; the lower end of the power head 16 is attached to high-pressure water connection 17, the high pressure water joint 17 is respectively installed with a high pressure water joint agent liquid flow inlet 18, a high pressure water joint air flow inlet 19 and a second heavy pipe water flow joint 20, one end of the high pressure grouting pipe 8 and the high pressure grouting pump outlet valve 7 Connected, the other end of the high pressure grouting pipe 8 is connected with the high pressure water joint chemical liquid flow inlet 18; the lower part of the power head 16 is equipped with a hoisting steel wire rope and a rotary jet drilling machine grouting drill pipe automatic lifting mechanism 21, high pressure water joint
- the lower part of the 17 is equipped with a high-pressure injection drill pipe 22, and the high-pressure injection drill pipe 22 is assembled by a high-pressure injection triple drill pipe inner pipe 23 and a high-pressure injection triple drill pipe outer pipe 24, and the high-pressure injection triple drill pipe inner pipe 23 is provided with a medicament.
- the injection nozzle 28, the high pressure injection triple drill pipe outer tube 24 is provided with an air injection nozzle 30, the bottom end of the high pressure injection drill pipe 22 is mounted with a drill bit 33, and the drill bit 33 is mounted with a cemented carbide block 32; the high pressure water joint chemical flow
- the inlet 18 is in communication with the high pressure injection triple drill pipe inner pipe 23, and the high pressure water joint air flow inlet 19 is in communication with the high pressure injection triple drill pipe outer pipe 24;
- the air compressor 11 is connected to the air compressor outlet valve 13 at the outlet of the air compressor 11
- One end of the air line 14 is connected to the air compressor outlet valve 13, one end of the compressed air line 14 is connected to the high pressure water joint air flow inlet 19, and the second heavy pipe water flow joint 20 is connected to the high pressure water joint 17
- the double pipe water flow joint 20 is closed or an external water pump (the interface is closed in this embodiment).
- the drug injection nozzles 28 are disposed in two, and the two drug injection nozzles 28 are horizontally distributed by 180°; the air injection nozzles 30 are disposed in three, and the three air injection nozzles 30 are horizontally distributed by 120°, and the air injection nozzles 30 are disposed. It is provided at a position of 100 to 200 mm below the drug injection nozzle 28.
- the grouting pressure (drug injection pressure) of the high pressure grouting pump 5 is 25 to 30 MPa, and the air pressure of the air compressor 11 is 0.7 to 0.8 MPa.
- the air compressor 11 is a screw type air compressor.
- This embodiment relates to an in situ injection of soil and groundwater - a high pressure rotary injection injection in situ repair method, comprising the following steps:
- Step 1 Place and lead:
- the cloth point parameters ensure that all the repair areas are covered within the diffusion radius of the medicament.
- the pilot hole drilling machine is placed at the center point of the injection point (drilling hole), and the air compression is always turned on during the rotary impact drilling process.
- the compressed air is used as the power source.
- the air pressure of the air compressor is 0.7-0.8 MPa.
- the hole is drilled by the pneumatic down-the-hole hammer impact rotary drilling method.
- the diameter of the injection point is 110 mm and the hole depth is 3 ⁇ 5m, it can penetrate the hard layer of the mixed soil or the original site concrete.
- the gravel layer and the broken and easy collapsed layer need to be drilled into the hole (such as steel casing) to ensure the high pressure injection stage. Smooth drilling of high pressure injection drill pipe;
- Step 2 In-situ injection of the repair agent - high-pressure jet injection:
- High-pressure injection repair uses a double tube: using gas (compressed air), liquid (repairing agent solution/slurry) fluid, and cutting the soil from bottom to top while spreading in the formation to achieve sufficient mixing of the repair agent with soil and groundwater; After the drill pipe is drilled down to the maximum depth of the design repair, the high-pressure grouting pump is turned on, and the high-pressure liquid flow (repairing the chemical solution/slurry) is sprayed while the compressed air is injected, and the automatic lifting mechanism provided by the rotary jet drilling machine is lifted from the bottom to the top.
- gas compressed air
- liquid repairing agent solution/slurry
- Step 3 Monitoring of the late reaction of the drug:
- the project is a soil and groundwater remediation project of a chemical plant in Nanjing.
- the amount of soil remediation works is 258,000 square meters, the amount of groundwater remediation works is 170,000 square meters, and the construction period requires 150 days.
- the maximum repair depth of the soil in this site is 12m.
- the groundwater is buried shallow (about 1m) and rich.
- the target pollutants in soil and groundwater are VOCs/SVOCs organic substances such as chlorobenzene, benzene, and para-o-nitrophenyl chloride.
- the repair medium is divided into two types: soil and groundwater combined pollution, and separate groundwater pollution areas.
- the preliminary pilot test used the injection work of injecting oxidant into the injection well. It has the disadvantages of high cost, small diffusion radius, unsuitable for injection of silty clay layer and saturated layer, slow construction progress, difficulty in ensuring injection volume and serious slurry return.
- Repair technology mainly uses in situ Chemical oxidation technology.
- 61% of the soil remediation and 66% of the groundwater remediation work in the project adopt the invention as a specific process of in-situ chemical oxidation.
- the practice shows that the single process technology cannot solve the complex pollution site.
- Engineering repairs, a high proportion of applications also indicate the advantages of the present invention.
- soil repair is 500-900 square soil/day
- groundwater repair is 500-700 flat groundwater/day.
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Abstract
Description
Claims (5)
- 一种土壤及地下水原位注入——高压旋喷注射原位修复系统,包括:配药站(1)、配药站出口阀门(2)、配药站出口不锈钢快速接头(3)、高压注浆泵进口阀门(4)、高压注浆泵(5)、高压注浆泵出口阀门(7)、高压注浆管(8)、空气压缩机(11)、空气压缩机出口阀门(13)、压缩空气管路(14)、旋喷钻机(15)、动力头(16)、高压水接头(17)、高压水接头药剂液流进口(18)、高压水接头空气流进口(19)、第二重管水流接头(20)、旋喷钻机注浆钻杆自动提升机构(21)、高压喷射钻杆(22)、高压喷射三重钻杆内管(23)、高压喷射三重钻杆外管(24)、药剂喷射喷嘴(28)、空气喷射喷嘴(30)、硬质合金块(32)和钻头(33);其特征在于,所述配药站(1)的出口安装有配药站出口阀门(2),配药站出口阀门(2)由配药站出口不锈钢快速接头(3)与高压注浆泵进口阀门(4)相连接,高压注浆泵进口阀门(4)与高压注浆泵(5)入口相连接,高压注浆泵(5)的出口连接有高压注浆泵出口阀门(7);旋喷钻机(15)的动力头(16)下部连接有高压水接头(17),高压水接头(17)上分别安装有高压水接头药剂液流进口(18)、高压水接头空气流进口(19)和第二重管水流接头(20),高压注浆管(8)的一端与高压注浆泵出口阀门(7)相连接,高压注浆管(8)的另一端与高压水接头药剂液流进口(18)相连接;动力头(16)的下部安装有卷扬钢丝绳与旋喷钻机注浆钻杆自动提升机构(21)连接,高压水接头(17)的下部安装有高压喷射钻杆(22),高压喷射钻杆(22)由高压喷射三重钻杆内管(23)和高压喷射三重钻杆外管(24)组装而成,高压喷射三重钻杆内管(23)上设有药剂喷射喷嘴(28),高压喷射三重钻杆外管(24)上设有空气喷射喷嘴(30),高压喷射钻杆(22)的底端安装有钻头(33),钻头(33)上安装有硬质合金块(32);高压水接头药剂液流进口(18)与高压喷射三重钻杆内管(23)相连通,高压水接头空气流进口(19)与高压喷射三重钻杆外管(24)相连通;空气压缩机(11)的出口连接有空气压缩机出口阀门(13),压缩空气管路(14)的一端与空气压缩机出 口阀门(13)相连接,压缩空气管路(14)的一端与高压水接头空气流进口(19)相连接,第二重管水流接头(20)与高压水接头(17)相连接,第二重管水流接头(20)处于封闭状态。
- 根据权利要求1所述的土壤及地下水原位注入——高压旋喷注射原位修复系统,其特征在于,所述药剂喷射喷嘴(28)设置为两个,两个药剂喷射喷嘴(28)水平180°分布;所述空气喷射喷嘴(30)设置为三个,三个空气喷射喷嘴(30)水平120°分布,所述空气喷射喷嘴(30)设置于药剂喷射喷嘴(28)下方100~200mm位置。
- 根据权利要求1所述的土壤及地下水原位注入——高压旋喷注射原位修复系统,其特征在于,所述高压注浆泵(5)的注浆压力为:25~30Mpa,空气压缩机(11)的空气压力为:0.7~0.8Mpa。
- 根据权利要求1所述的土壤及地下水原位注入——高压旋喷注射原位修复系统,其特征在于,所述空气压缩机(11)为螺杆式空气压缩机。
- 一种土壤及地下水原位注入——高压旋喷注射原位修复方法,其特征在于,步骤一:布点及引孔:按照三角形法布点,布点参数保证药剂扩散半径范围内全部覆盖修复区域,GPS测点定位后,引孔钻机就位注入点的中心点,在回转冲击钻进过程中始终开启空气压缩机,压缩空气作为动力源,空气压缩机的空气压力为0.7~0.8MPa,采用气动潜孔锤冲击回转钻进方法成孔,所述注入点的孔径口径为110mm,孔深为3~5m,穿透杂填土硬层或原场地混凝土等基础即可,遇卵砾石层、破碎易坍塌地层则需跟管钻进成孔,以保证高压注射阶段高压注射钻杆的顺利下钻;步骤二:修复药剂的原位注入——高压旋喷注射:高压注射修复采用二重管:利用气、液流体,自下而上切割土体的同时在地层中扩散,实现修复药剂与土壤及地下水的充分混合;喷射钻杆下钻至设计修复最大深度后,开启高压注浆泵,喷射高压液流的同时喷射压缩空气,通过旋喷钻机自带的自动提升机构自下而上边提升边旋转钻杆;药剂喷射至修复设计顶面标高后,停止高压注浆泵,压缩空气继续喷射至完全提钻后停止供气;所述药剂喷射过程空气压缩机的空气压力保 持在0.7~0.8Mpa,高压注浆泵注射压力为25~30Mpa,注浆流量20~120L/min,提升速度:5~20cm/min,药剂扩散半径达到0.8~3.5m;步骤三:药剂反应后期监测:完成修复药剂注射待药剂充分反应后,在已完成一轮注射修复区域扩散半径范围内设立若干2英寸PVC的地下水监测井及土样采样点,采取土壤及地下水样品,现场快速结合实验室检测获取修复药剂残留、pH值以及污染物浓度的参数,以检验原位修复效果及监测药剂残留情况;该步骤作用在于指导药剂投加参数的优化设计,作为是否进行二轮或多轮注射补充修复的依据。
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US16/306,856 US10787865B2 (en) | 2016-06-23 | 2017-05-16 | In-situ injection of soil and groundwater—high pressure rotary jet grouting in-situ remediation system and method |
JP2018566412A JP6686185B2 (ja) | 2016-06-23 | 2017-05-16 | 土壌と地下水の原位置注入−高圧ジェットグラウト注入原位置修復システム及び方法 |
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CN105964678B (zh) | 2017-11-14 |
US10787865B2 (en) | 2020-09-29 |
JP6686185B2 (ja) | 2020-04-22 |
CA3025709A1 (en) | 2017-12-28 |
CN105964678A (zh) | 2016-09-28 |
CA3025709C (en) | 2021-10-12 |
JP2019519702A (ja) | 2019-07-11 |
US20190145190A1 (en) | 2019-05-16 |
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