CN216989174U - Double-fluid injection integrated equipment for soil groundwater remediation - Google Patents
Double-fluid injection integrated equipment for soil groundwater remediation Download PDFInfo
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- CN216989174U CN216989174U CN202121362173.XU CN202121362173U CN216989174U CN 216989174 U CN216989174 U CN 216989174U CN 202121362173 U CN202121362173 U CN 202121362173U CN 216989174 U CN216989174 U CN 216989174U
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Abstract
The utility model discloses a double-fluid injection integrated device for soil and underground water remediation, which comprises an injection unit, a dispensing unit and an auxiliary unit, wherein the injection unit comprises a first injection unit and a second injection unit; the injection unit comprises an injection pump, an air compressor, an injection rod, an injection ejector rod, a connecting cavity, an injection head, a spray head shell and an injection control mechanism; the dispensing unit comprises a medicament dispensing groove and a medicament storage groove; the auxiliary unit comprises an electric control cabinet, a rod piece box, a pressing device and a skid-mounted platform; the injection unit, the dispensing unit and the auxiliary unit are all integrated on the skid-mounted platform. The integrated equipment provided by the utility model can complete in-situ injection repair of soil and underground water, achieve simultaneous injection of liquid medicament and gas and enhance the dispersing, diffusing and permeating capabilities of the medicament and the mixing capability of the medicament and underground pollutants, thereby improving the repair efficiency and the repair effect.
Description
Technical Field
The utility model relates to an in-situ injection technical device used in the technical field of environmental remediation, in particular to a mobile double-fluid injection integrated device used for remedying soil and underground water pollution of low-permeability stratum.
Background
China has long viewed the petrochemical industry as an important, supporting industry. The petrochemical enterprises have the characteristics of large water consumption, large water discharge, transportation requirements on raw materials and products and the like, so that the petrochemical enterprises have the layout characteristics of facing the sea, the river and the lake. In which there are dozens of thousands of chemical enterprises along the bank of the Yangtze river, and the economic zone of the Yangtze river bears 30% of petrochemical industry nationwide in 21% of land. The problems of possible pipeline and storage tank leakage or wastewater discharge in the chemical industry can cause serious pollution to soil and underground water, the related main pollutants comprise petroleum hydrocarbon, benzene series, polycyclic aromatic hydrocarbon, phenols, chlorinated hydrocarbon and the like, and the substances can cause serious harm to health after entering human bodies.
The conventional remediation method for the pollution in the petrochemical site is in-situ remediation. Compared with ex-situ remediation, in-situ remediation does not involve soil or underground water dredging/pumping out, transportation and storage, can reduce remediation cost and effectively prevent secondary pollution, and is also suitable for sites unsuitable for large-scale excavation. The in-situ injection repairing technology included in the in-situ repair refers to the purpose of repairing soil or underground water by injecting and adding a specific repairing medicament to react with underground pollutants and converting the pollutants into non-toxic or low-toxic substances. Compared with other in-situ repair technologies, in-situ injection has the outstanding advantages of high efficiency, wide application range and the like.
The conventional in-situ injection technology adopted in the soil and underground water remediation engineering mainly comprises direct-pressure high-pressure injection and injection well injection, and is mainly suitable for pollution remediation of soil and underground water in a saturated zone. The direct-pressure high-pressure injection is to inject a prepared liquid medicament into a polluted soil layer through an injection pump by directly pressing the liquid medicament into an underground injection rod for repairing. The injection well is injected for setting up the injection well in the restoration region, and liquid restoration medicament gets into the contaminated soil layer through the injection well under the pressure of syringe pump and realizes polluting the restoration. Disadvantages of these conventional injection techniques are: the method mainly relies on pores and cracks in soil layers as channels to disperse and repair the medicament and helps the medicament to further diffuse through underground water flow, so that the method is mainly suitable for uniform and medium and high-permeability saturated zone formations.
Areas gathered in the economic zone of Yangtze river of China and gathered by petrochemical enterprises have the characteristics of low soil permeability, more adhesive/interlayer, shallow underground water level and poor permeability. If conventional injection techniques are used, the function of the remediation agent will be primarily to areas of high hydraulic conductivity due to the presence of preferential flow pathways, and the remediation effect will be primarily limited to highly permeable formations. The pollutants remained in the low-permeability soil layer can slowly diffuse into the high-permeability soil layer due to the concentration gradient, become long-term secondary sources of the pollutants, inhibit the repairing effect and cause tailing of repairing work and even rebound. Diffusion of contaminants in low permeability zones can be as long as years to decades, and inclusion of low permeability and high permeability formations in the land mass makes the defect more pronounced, which also greatly increases the difficulty of overall repair.
In the Chinese invention patent 'soil and groundwater in-situ injection-high pressure jet grouting injection in-situ remediation system and method' with the application number of 201610464626.7, a technology for in-situ injection by using a high pressure jet grouting method for foundation treatment in the field of rock and soil is provided, so as to solve the problem of in-situ injection in low permeability areas. The injection device has the problems that the required injection pressure is high (25-30 Mpa), the requirement on equipment is high, and certain danger exists in the field operation process; the damage to the soil body structure can be caused, the bearing capacity of the soil body can be greatly reduced, and the effect on partial shallow soil layers is limited; the injection flow is large, so that slurry return and slurry outflow are easily caused, and medicament waste and secondary pollution are caused; when the equipment moves, all parts of the system need to be frequently disassembled and assembled.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a mobile double-fluid injection integrated device for in-situ remediation of soil and underground water pollution of low-permeability stratum, which overcomes the defects and shortcomings of the existing in-situ injection technology, completes gas and liquid double-fluid injection of the stratum, further improves the remediation efficiency, and reduces the remediation time and cost.
In order to achieve the aim, the utility model provides a double-fluid injection integrated device for soil groundwater remediation, wherein the integrated device comprises an injection unit, a dispensing unit and an auxiliary unit; the injection unit comprises an injection pump, an air compressor, an injection rod, an injection ejector rod, a connecting cavity, an injection head, a spray head shell and an injection control mechanism; the dispensing unit comprises a medicament dispensing groove and a medicament storage groove; the auxiliary unit comprises an electric control cabinet, a rod piece box, a pressing device and a skid-mounted platform; the injection unit, the dispensing unit and the auxiliary unit are all integrated on the skid-mounted platform.
The double-fluid injection integrated equipment for soil and underground water remediation is characterized in that the injection ejector rod is vertically downwards connected with and communicated with the injection rod, the connecting cavity is arranged at the bottom end of the injection rod, the bottom of the connecting cavity is connected with the injection head, and the spray head shell is sleeved outside the injection head; the pressing device is fixed on the skid-mounted platform.
The above-mentioned double-fluid injection integrated equipment for soil groundwater remediation, wherein the auxiliary unit further comprises a cable and a pipeline; the pipeline comprises a medicine conveying hose and a compressed air hose; the cable is arranged among the electric control cabinet, the injection unit, the dispensing unit and the pressing device; the pressing device, the injection control mechanism, the injection pump and the air compressor are respectively connected with the electric control cabinet through cables; the medicine conveying hose and the compressed air hose are arranged between the injection unit and the dispensing unit; the medicament configuration groove, the medicament storage groove and the injection pump are sequentially connected through a medicament delivery hose, the outlet of the injection pump is connected with the injection ejector rod through the medicament delivery hose, and the outlet of the air compressor is connected with the injection ejector rod through a compressed air hose.
The double-fluid injection integrated equipment for soil and underground water remediation is characterized in that in the auxiliary unit, a skid-mounted platform is integrated with a whole set of equipment, and universal wheels with self-locking structures are mounted at the bottoms of two sides.
The above-mentioned a two fluid injection integrated equipment for soil groundwater is restoreed, wherein, in the auxiliary unit, the push down device contain hydraulic cylinder, solenoid operated valve, magenetic exchange valve, hydraulic pressure check valve, gear pump, accomplish the push down to the injection pole.
The above-mentioned two-fluid injection integrated equipment for soil groundwater remediation, wherein, in the unit of dispensing, the medicament configuration inslot is equipped with the mixer to have the liquid level scale, the top still is equipped with adds medicine metering mechanism.
The double-fluid injection integrated equipment for soil and underground water remediation is characterized in that the dosing metering mechanism is an accumulation flowmeter.
The above-mentioned two-fluid injection integrated equipment for soil groundwater remediation, wherein, in the injection unit, the injection control mechanism contains manometer, flowmeter, adjusting valve, and the injection control mechanism connects injection pump and air compressor.
The double-fluid injection integrated equipment for soil and underground water remediation is characterized in that in the injection unit, the injection ejector rod is of a double-layer pipe structure, an outer cavity is formed between the outer layer pipe and the inner layer pipe, an inner cavity is arranged in the inner layer pipe, 2 inlet channels are arranged on the injection ejector rod and are respectively connected with the air compressor and the injection pump, and the lower part of the injection ejector rod is connected with the injection rod through threads; the injection rod is composed of a plurality of connected rods, each injection rod is of a double-layer pipe structure, an outer cavity is formed between the outer layer pipe and the inner layer pipe, an inner cavity is arranged in the inner layer pipe and is respectively communicated with the outer cavity and the inner cavity of the injection ejector rod, the inner cavity is connected with the injection pump through the injection ejector rod, and the outer cavity is connected with the air compressor; the two injection rods are fixedly connected through threads, and the injection rod at the lowest end is connected with the connecting cavity; the top end of the connecting cavity is connected with the injection rod, and the bottom end of the connecting cavity is connected with the injection head.
The double-fluid injection integrated equipment for soil and underground water remediation is characterized in that the injection head is a double-fluid rotary nozzle driven by compressed air and is connected to the connecting cavity through threads; the injection head is covered and protected by the nozzle shell when pressed into a soil layer, the top of the nozzle shell is conical, and the rear part of the nozzle shell is cylindrical and is connected with the connecting cavity through the sliding strip.
The double-fluid injection integrated equipment for soil and underground water remediation provided by the utility model has the following advantages:
(1) the complete equipment is integrated on the skid-mounted platform, so that the hoisting and the transportation are convenient, the time required by the steps of disassembling, assembling, debugging and the like is saved, the labor intensity of constructors is reduced, and the repair construction efficiency is improved. The universal wheels with self-locking structures are arranged below the skid-mounted platform, so that the equipment can move between injection points conveniently. The skid-mounted platform and the whole equipment borne by the skid-mounted platform are used as a counter force overcoming mechanism when the injection rod is pressed down, so that the pressing down is more stable.
(2) Static hydraulic pressure is used in the pushing down of injection pole in the injection process, has avoided the horizontal disturbance that the operation such as hammering pushed down caused, reduces the influence to the soil layer, can effectively avoid the problem such as the thick liquid that emits in the injection process, and compares in high-pressure injection, and equipment energy consumption is lower.
(3) The shearing and striking effect of the double-fluid injection on the soil can help to open originally closed pores in part of the soil, increase the effective porosity of the soil, enable the repairing agent to be in more sufficient contact with the polluted soil underground water, and reduce the phenomenon of slurry bleeding; meanwhile, pollutants originally sealed in the non-communicated pores are increased due to the increase of the effective porosity and the opening of the micro-channel, and are also increased to be in mixed contact with the medicament and removed through reaction.
(4) The double-fluid injection head is a rotary nozzle, is driven to rotate by compressed air, and enables the injection of the medicament to be more uniform through rotary spraying. Part of the compressed gas will escape upwards after entering the soil pores, helping in the process to open up the soil pores longitudinally, further helping to disperse the remediation agent in the vertical direction.
(5) The gas and liquid are injected simultaneously to form effective turbulence, so that the diffusion speed of the medicament in soil gaps is increased; the irregular movement of the turbulent flow enables the gas and the liquid to be strongly mixed, so that the medicament is more uniformly distributed; and the turbulence increases the friction, which is beneficial to the full contact of the medicament and the pollutants, thereby strengthening the reaction of the medicament and the pollutants.
(6) The medicament can be effectively atomized by the rotary injection of the double-fluid rotary injection head and the matching of the two fluids of the compressed gas, so that the liquid drops can be dispersed along with the gas in the aeration zone, the size of the liquid drops can be reduced, the number of the liquid drops is increased, the surface area of the medicament is increased, and the application of the injection technology in the pollution remediation of the direct aeration zone is realized; the atomized small liquid drops can enable the agent to enter and be more uniformly dispersed in soil pores and micro-channels, so that the dispersion and diffusion effects of the repairing agent in an aeration zone and a low-permeability stratum are improved, the long-term reverse diffusion caused by slow release of residual pollutants in the low-permeability stratum is reduced or eliminated, and the problems of 'tailing' and rebound of repairing engineering are solved.
Drawings
Fig. 1 is a schematic structural view of a dual fluid injection integrated apparatus for soil groundwater remediation according to the present invention.
Fig. 2 is a schematic view of the connection chamber and the head housing in a closed state in the integrated apparatus of the present invention.
Fig. 3 is a schematic cross-sectional view of a dual fluid rotary nozzle of an injection head in an integrated apparatus of the present invention.
Fig. 4 is a schematic diagram of the injection unit in the injection state in the integrated device of the present invention.
Wherein: 1. an electric control cabinet; 2. an injection pump; 3. an air compressor; 4. an injection rod; 5. injecting a mandril; 5-1, an outer cavity inlet; 5-2, an inner cavity inlet; 6. a connecting cavity; 7. an injection head; 7-1, rotating a nozzle; 8. a nozzle housing; 9. a medicament disposition slot; 10. a medicament storage tank; 11. a rod box; 12. a pressing device; 13. skid-mounting a platform; 14. a slide bar; 15. an injection control mechanism.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The utility model provides a double-fluid injection integrated device for soil and underground water remediation, which comprises an injection unit, a dispensing unit and an auxiliary unit; the injection unit comprises an injection pump 2, an air compressor 3, an injection rod 4, an injection ejector rod 5, a connecting cavity 6, an injection head 7, a spray head shell 8 and an injection control mechanism 15; the dispensing unit comprises a medicament dispensing groove 9 and a medicament storage groove 10; the auxiliary unit comprises an electric control cabinet 1, a rod piece box 11, a pressing device 12 and a skid-mounted platform 13; the injection unit, the dispensing unit and the auxiliary unit are all integrated on the skid-mounted platform 13; the electric control cabinet 1, the rod box 11, the pressing device 12, the injection ejector rod 5, the air compressor 3, the injection pump 2, the medicament storage tank 10 and the medicament configuration tank 9 are sequentially arranged above the skid-mounted platform 13 along the horizontal direction; the injection rod 4 is vertically arranged downwards from the skid-mounted platform 13, and the connecting cavity 6, the injection head 7 and the nozzle shell 8 are arranged below the skid-mounted platform 13 along the vertical direction and are connected with the injection rod 4.
Preferably, the injection ejector rod 5 is vertically downward connected with and communicated with the injection rod 4, the connecting cavity 6 is arranged at the bottom end of the injection rod 4, the bottom of the connecting cavity 6 is connected with the injection head 7, and the spray head shell 8 is sleeved outside the injection head 7; the pressing device 12 is fixed on a skid-mounted platform 13 and is used for mounting the injection rod 4.
The auxiliary unit also comprises a cable and a pipeline; the pipeline comprises a medicine conveying hose and a compressed air hose; the cable is arranged between the electric control cabinet 1 and the injection unit, the dispensing unit and the pressing device 12; the pressing device 12, the injection control mechanism 15, the injection pump 2 and the air compressor 3 are respectively connected with the electric control cabinet 1 through cables; the medicine conveying hose and the compressed air hose are arranged between the injection unit and the dispensing unit; the medicament configuration groove 9, the medicament storage groove 10 and the injection pump 2 are sequentially connected through a medicament delivery hose, the outlet of the injection pump 2 is connected with the injection ejector rod 5 through the medicament delivery hose, and the outlet of the air compressor 3 is connected with the injection ejector rod 5 through a compressed air hose.
The skid-mounted platform 13 in the auxiliary unit is integrated with a whole set of equipment, universal wheels with self-locking structures are mounted at the bottoms of two sides of the skid-mounted platform, the skid-mounted platform is convenient to move, and the skid-mounted platform 13 is used as a counter-force overcoming mechanism when the whole skid-mounted platform is pressed down; the pressing device 12 comprises a hydraulic oil cylinder, an electromagnetic regulating valve, an electromagnetic reversing valve, a hydraulic one-way valve and a gear pump, and is used for pressing the injection rod 4; the rod case 11 stores therein rods including the injection rod 4; the electric control cabinet 1 completes the whole electric power access and distribution of the equipment. The device uses a 380V three-phase power input.
A stirrer is arranged in a medicament configuration groove 9 in the dispensing unit, the liquid level scale is arranged in the medicament configuration groove, and a dosing metering mechanism is arranged at the top of the medicament configuration groove. The drug storage tank 10 is connected to the drug disposition tank 9 for storing the disposed drug solution, and is connected to the injection unit through a drug delivery hose. The dosing metering mechanism is an accumulation flowmeter.
The injection control mechanism 15 in the injection unit comprises a pressure gauge, a flow meter and an adjusting valve, and the injection control mechanism 15 is connected with the injection pump 2 and the air compressor 3 and respectively adjusts the flow rate thereof for control. The outlets of the injection pump 2 and the air compressor 3 are connected with an injection mandril 5 through pipelines. The injection control mechanism 15 is used to regulate the flow rate of the injection pump 2 and the air compressor 3.
An injection ejector rod 5 in the injection unit is of a double-layer pipe structure, an outer cavity is formed between an outer layer pipe and an inner layer pipe, an inner cavity is arranged in the inner layer pipe, 2 inlet channels are arranged on the injection ejector rod 5 and are respectively connected with an air compressor 3 and an injection pump 2, and the lower part of the injection ejector rod 5 is connected with an injection rod 4 through threads; the injection rod 4 is formed by connecting a plurality of rods, and each rod is of a double-layer pipe structure, namely a double pipe; an outer cavity is also formed between the outer layer pipe and the inner layer pipe, an inner cavity is arranged in the inner layer pipe and is respectively communicated with the outer cavity and the inner cavity of the injection ejector rod 5, the inner cavity is connected with the injection pump 2 through the injection ejector rod 5, and the outer cavity is connected with the air compressor; the two injection rods 4 are fixedly connected through threads, and the injection rod 4 at the lowest end is connected with the connecting cavity 6; the top end of the connecting cavity 6 is connected with the injection rod 4, and the bottom end is connected with the injection head 7.
The injection head 7 is a double-fluid rotary spray head driven by compressed air, is provided with a rotary spray nozzle 7-1 and is connected to the connecting cavity 6 through threads; the injection head 7 is covered and protected by a nozzle shell 8 when being pressed into a soil layer, the top of the nozzle shell 8 is conical, the rear part of the nozzle shell 8 is cylindrical, and the nozzle shell is connected with the connecting cavity 6 through a slide bar 14.
The integrated apparatus for two-fluid injection for groundwater remediation according to the present invention will be further described with reference to the following examples.
Example 1
A double-fluid injection integrated device for soil and underground water remediation is particularly suitable for in-situ remediation of low-permeability stratum pollution in petrochemical sites and comprises an injection unit consisting of an injection pump 2, an air compressor 3, an injection rod 4, an injection ejector rod 5, a connecting cavity 6, a double-fluid rotary injection head 7 and a nozzle shell 8; a dispensing unit consisting of a medicament configuration groove 9 and a medicament storage groove 10; the auxiliary unit comprises an electric control cabinet 1, a rod box 11, a pressing device 12 and a skid-mounted platform 13. All the equipment is integrated on the skid-mounted platform 13.
When the double-fluid injection integrated equipment is in an injection working state, the injection ejector rod 5, the injection rod 4, the connecting cavity 6 and the double-fluid rotary injection head 7 are sequentially connected through threads. The nozzle shell 8 plays a role in protecting the double-fluid rotary injection head 7 when pressed in, and slides downwards to expose the double-fluid rotary injection head 7 before injection. All of the above components are depressed by the hold-down device 12 to the planned repair depth. The injection pump 2 and the air compressor 3 are connected to an injection mandril 5 through hoses. The medicament storage tank 10 is connected with the injection pump 2 through a drug delivery hose. The medicament is dispensed in the medicament dispensing groove 9 as required. Referring to fig. 1, the arrows indicate the direction of fluid transport.
Stratum data obtained in advance detection and parameters such as injection volume, flow and pressure obtained through calculation are input through the injection control mechanism 15, parameter adjustment is achieved through the injection pump 2 and the executing mechanisms on the air compressor 3, accurate injection of all stratums and all depths is achieved, a plurality of in-situ injection problems caused by stratum heterogeneity are effectively solved, and potential secondary pollution caused by waste of chemicals, slurry bleeding and the like is avoided.
When the injection unit stem is depressed, the connecting chamber 6 and the nozzle housing 8 are in a closed state as shown in fig. 2. The connecting cavity 6 is provided with a gas-liquid outlet tapered end which is communicated with the double-fluid rotary injection head 7, so that the diameter of the gas-liquid pipe is reduced to be the same as the size of the inlet of the double-fluid rotary injection head 7. The lower end of the nozzle shell 8 is a conical surface, and the outer diameter of the nozzle shell is the same as that of the connecting cavity 6, so that the nozzle shell can be pressed downwards to drill into a soil layer. When pushing down, shower nozzle shell 8 receives the vertical ascending power in soil horizon below, upwards slides through draw runner 14, and is closed with being connected the chamber 6 contact for two fluid rotatory injection head 7 hides in shower nozzle shell 8 when drilling, prevents to bore the soil because receive the extrusion and contact with two fluid rotatory injection head 7, and avoids the rotatory nozzle 7-1 jam that probably leads to, damage or rotate unsmooth.
The section of the two-fluid rotary injection head 7 is shown in fig. 3, with the rotary nozzle 7-1 oriented tangentially to the center. Compressed gas is sprayed out through the rotary nozzle 7-1, the counterforce of the compressed gas drives the spray head to rotate, the repair medicament is sprayed out through the rotary nozzle, the medicament is atomized and uniformly dispersed in a mechanical mode, smaller liquid drops are further formed under the influence of the compressed gas, and the diffusion of the repair medicament in a low-permeability area and an aeration zone is realized.
The overall structure of the injection unit rod at the time of injection is shown in fig. 4. Through the whole lifting of the rod piece, the spray head shell 8 slides downwards along the sliding strips 14 under the action of gravity and is separated from the connecting cavity 6, and the sliding strips 14 on the two sides are suspended below the connecting cavity 6, so that the originally hidden double-fluid rotary injection head 7 in the spray head shell 8 is exposed, the injection repair work is allowed to be carried out, a small-section cavity is formed between the connecting cavity 6 and the spray head shell 8, and the phenomenon that the injection head 7 is not in contact with the soil body to cause rotation irregularity is avoided. An outer cavity inlet 5-1 and an inner cavity inlet 5-2 on the injection ejector rod 5 are respectively connected with the air compressor 3 and the injection pump 2 through hoses, so that compressed air and repair medicaments respectively enter an outer tube and an inner tube of the injection ejector rod 5 and the injection rod 4 and flow down along the injection rod 4, and enter a double-fluid rotary injection head 7 with a small tube diameter through a tapered end in a connecting cavity 6 to drive the rotary nozzle 7-1 to rotate and be sprayed out through the double-fluid rotary injection head. Wherein the number of injection rods 4 will be determined by the injection depth. The direction of rotation of the rotating nozzle 7-1 is perpendicular to the mouthpiece direction, and is horizontal in the case of a vertical press-in of the injection rod 4.
The electric control cabinet 1 is an outdoor extensible electric control cabinet and comprises an equipment power supply access and control module; the flow range of the injection pump 2 is 0-2m3H, the pressure range is 0-2.5 MPa; the flow of the air compressor 3 is 1-5m3Min, pressure 0.4-0.7 MPa; the injection rate of the medicament is generally controlled to be 10-35L/min; the diameter of the medicament configuration groove 9 is 1m, and the height is 1 m; the medicament storage tank 10 has a diameter of 1m and a height of 1 m; the skid-mounted platform 13 is 6m multiplied by 2.4m in specification. Aiming at petrochemical site pollution, a typical restoration method is an in-situ chemical oxidation technology, so a restoration medicament is preferably a Fenton reagent or activated persulfate solution, and meanwhile, the injection rod 4, the injection ejector rod 5, the connecting cavity 6, the double-fluid rotary injection head 7 and the spray headFor equipment such as the housing 8 that comes into contact with the oxidative remediation agent, a corrosion-resistant material is used, and 316L stainless steel is preferred.
Example 2
A dual fluid injection integrated apparatus for soil groundwater remediation which in operation comprises:
and 9, repeating the steps 2 to 8 until all the designed injection points complete the injection of the medicament.
The two-fluid injection integrated equipment for repairing soil and underground water provided by the utility model can utilize one set of integrated equipment to complete in-situ injection repair of soil and underground water, so that simultaneous injection of two fluids of liquid medicament and gas is achieved, and the dispersion, diffusion and permeability of the medicament and the mixing capacity of underground pollutants are enhanced, thereby improving the repair efficiency and the repair effect. When the integrated skid-mounted device is used, the integrated skid-mounted device is transferred to the position near an injection point, and the injection rod is directly pressed to the underground restoration depth by using a pressing device; the gas-liquid double-fluid injection adopts double-pipe rotary injection that an air compressor and an injection pump are connected with an injection rod, compressed air drives a spray head to rotate, and simultaneously gas is utilized to cut a soil body, so that atomization of liquid medicament is realized, the liquid medicament is smoothly dispersed in a low-permeability stratum and is fully mixed and contacted with pollutants, and the gas-coated double-fluid injection can be simultaneously suitable for pollution remediation of gas-coated soil, saturated soil and underground water.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the utility model. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the utility model should be limited only by the attached claims.
Claims (10)
1. The double-fluid injection integrated equipment for soil groundwater remediation is characterized by comprising an injection unit, a dispensing unit and an auxiliary unit;
the injection unit comprises an injection pump, an air compressor, an injection rod, an injection ejector rod, a connecting cavity, an injection head, a spray head shell and an injection control mechanism;
the dispensing unit comprises a medicament dispensing groove and a medicament storage groove;
the auxiliary unit comprises an electric control cabinet, a rod piece box, a pressing device and a skid-mounted platform;
the injection unit, the dispensing unit and the auxiliary unit are all integrated on the skid-mounted platform.
2. The integrated equipment for dual-fluid injection for soil groundwater remediation as claimed in claim 1, wherein the injection ejector rod is vertically connected and communicated with the injection rod downwards, the connection cavity is arranged at the bottom end of the injection rod, the bottom of the connection cavity is connected with the injection head, and the spray head shell is sleeved outside the injection head; the pressing device is fixed on the skid-mounted platform.
3. The integrated dual fluid injection apparatus for groundwater remediation as claimed in claim 1, wherein the auxiliary unit further comprises cables and pipes; the pipeline comprises a medicine conveying hose and a compressed air hose; the cable is arranged among the electric control cabinet, the injection unit, the dispensing unit and the pressing device; the pressing device, the injection control mechanism, the injection pump and the air compressor are respectively connected with the electric control cabinet through cables; the medicine conveying hose and the compressed air hose are arranged between the injection unit and the dispensing unit; the medicament configuration groove, the medicament storage groove and the injection pump are sequentially connected through a medicament delivery hose, the outlet of the injection pump is connected with the injection ejector rod through the medicament delivery hose, and the outlet of the air compressor is connected with the injection ejector rod through a compressed air hose.
4. The integrated equipment for soil groundwater remediation of claim 3 wherein in the auxiliary unit, the skid-mounted platform is integrated with the whole set of equipment, and universal wheels with self-locking structures are mounted at the bottoms of two sides.
5. The integrated equipment for soil groundwater injection as claimed in claim 4, wherein in the auxiliary unit, the pressing device comprises a hydraulic oil cylinder, an electromagnetic regulating valve, an electromagnetic directional valve, a hydraulic one-way valve and a gear pump to press the injection rod.
6. The integrated equipment for soil groundwater injection as claimed in claim 3, wherein in the dosage unit, a stirrer is arranged in the agent preparation tank, the dosage unit is provided with liquid level scales, and the top of the dosage unit is provided with a dosing metering mechanism.
7. The integrated dual fluid injection apparatus for soil groundwater remediation of claim 6 wherein the dosing metering mechanism is an accumulation flow meter.
8. The integrated dual fluid injection apparatus for groundwater remediation as claimed in claim 3, wherein the injection control mechanism in the injection unit comprises a pressure gauge, a flow meter, and a regulating valve, and the injection control mechanism is connected with an injection pump and an air compressor.
9. The integrated equipment for dual-fluid injection of soil groundwater remediation of claim 8, wherein in the injection unit, the injection ejector rod is of a double-layer pipe structure, an outer cavity is formed between the outer layer pipe and the inner layer pipe, an inner cavity is arranged in the inner layer pipe, 2 inlet channels are arranged on the injection ejector rod and are respectively connected with the air compressor and the injection pump, and the lower part of the injection ejector rod is connected with the injection rod through threads; the injection rod is composed of a plurality of connected rods, each injection rod is of a double-layer pipe structure, an outer cavity is formed between the outer layer pipe and the inner layer pipe, an inner cavity is arranged in the inner layer pipe and is respectively communicated with the outer cavity and the inner cavity of the injection ejector rod, the inner cavity is connected with the injection pump through the injection ejector rod, and the outer cavity is connected with the air compressor; the two injection rods are fixedly connected through threads, and the injection rod at the lowest end is connected with the connecting cavity; the top end of the connecting cavity is connected with the injection rod, and the bottom end of the connecting cavity is connected with the injection head.
10. The integrated dual fluid injection apparatus for groundwater remediation as claimed in claim 9, wherein the injection head is a compressed air driven dual fluid rotary nozzle connected to the connection chamber by a screw thread; the injection head is covered and protected by the spray head outer shell when being pressed into a soil layer, the top of the spray head outer shell is conical, and the rear part of the spray head outer shell is cylindrical and is connected with the connecting cavity through a slide bar.
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| CN202121362173.XU CN216989174U (en) | 2021-06-18 | 2021-06-18 | Double-fluid injection integrated equipment for soil groundwater remediation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113290034A (en) * | 2021-06-18 | 2021-08-24 | 上海格林曼环境技术有限公司 | Double-fluid injection integrated system for soil groundwater remediation |
| CN116586418A (en) * | 2023-05-09 | 2023-08-15 | 生态环境部南京环境科学研究所 | Buried pile capable of slowly releasing medicament for in-situ repair of polluted soil and repair method |
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2021
- 2021-06-18 CN CN202121362173.XU patent/CN216989174U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113290034A (en) * | 2021-06-18 | 2021-08-24 | 上海格林曼环境技术有限公司 | Double-fluid injection integrated system for soil groundwater remediation |
| CN116586418A (en) * | 2023-05-09 | 2023-08-15 | 生态环境部南京环境科学研究所 | Buried pile capable of slowly releasing medicament for in-situ repair of polluted soil and repair method |
| CN116586418B (en) * | 2023-05-09 | 2024-07-16 | 生态环境部南京环境科学研究所 | Buried pile capable of slowly releasing medicament for in-situ repair of polluted soil and repair method |
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