CN113770171B - In-situ injection remediation method for remediating soil based on in-situ oxidation - Google Patents
In-situ injection remediation method for remediating soil based on in-situ oxidation Download PDFInfo
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- CN113770171B CN113770171B CN202111109714.2A CN202111109714A CN113770171B CN 113770171 B CN113770171 B CN 113770171B CN 202111109714 A CN202111109714 A CN 202111109714A CN 113770171 B CN113770171 B CN 113770171B
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The invention relates to the technical field of soil in-situ remediation, in particular to an in-situ injection remediation method and equipment based on in-situ oxidation remediation of soil; the method comprises the following steps: preparing an oxidation repairing agent; connecting the in-situ injection repairing equipment with a mobile vehicle, and then inserting the injection pipe set into the polluted soil in a continuous rolling mode during the running process of the vehicle to carry out continuous rolling injection repairing; the in-situ injection repairing equipment comprises an operating rack which can be connected with a moving vehicle, two side fixed connecting pieces which are arranged on the operating rack, a rolling injection device which is movably arranged in the middle of the two side fixed connecting pieces and is horizontally arranged, and a repairing medicament supply unit which is communicated with the rolling injection device; the invention can greatly improve the working efficiency of in-situ injection remediation of the soil in the prior art and effectively shorten the construction period of the remediation operation of the large-area soil.
Description
Technical Field
The invention relates to the technical field of soil in-situ remediation, in particular to an in-situ injection remediation method for remediating soil based on in-situ oxidation.
Background
With the advance of the urbanization process and the adjustment of the industrial structure, the industrial enterprises of pesticide, chemical industry and the like in large and medium-sized cities gradually stop or move away from the urban area, and meanwhile, a large amount of polluted sites are left to be subjected to soil or underground water remediation work.
The in-situ chemical oxidation technology is a main method for repairing underground water and soil due to the characteristics of high efficiency, rapidness and convenient implementation, and is a polluted soil repairing technology which mainly degrades or converts pollutants into low-toxicity and low-mobility products through an oxidation reaction generated by a chemical oxidant doped into the soil and the pollutants. Under the action of the medicament, pollutants in soil or underground water are converted into substances with no toxicity or relatively low toxicity, so that the aim of repairing is fulfilled, and the method is mainly suitable for polluted sites which are difficult to excavate and have more structures.
In the prior art, in-situ repair medicament injection is generally carried out in an injection well type injection mode or a direct push type injection mode through an injection rod; the invention patent with the application number of CN202110574342.4 discloses a device for carrying a vertical drill boom by adopting crawler mobile equipment and implementing medicament injection, which realizes in-situ oxidation remediation of soil; the mode of vertically inserting the soil has the problems that the working efficiency is low, and continuous rolling operation cannot be carried out; for the large-area soil to be repaired, the working efficiency of the prior art causes the repair difficulty and the working period is long.
Disclosure of Invention
The technical problem solved by the invention is as follows: the existing in-situ injection repair technology has low working efficiency and long working period; the existing in-situ injection repair equipment has no operation capability aiming at large-area soil to be repaired.
The technical scheme of the invention is as follows: an in-situ injection remediation method for remediating soil based on in-situ oxidation comprises the following steps:
s1: preparing an oxidation repairing medicament, adding sodium persulfate and deionized water into a medicament storage box, and uniformly stirring to ensure that the concentration of the sodium persulfate is 10%;
s2: connecting the in-situ injection repairing equipment with a mobile vehicle to repair the polluted soil;
a plurality of injection pipes are inserted into the polluted soil in a continuous rolling mode, and meanwhile, a negative pressure injection device is used for enabling the injection pipes inserted into the soil to spray sodium persulfate solution diffused in a sector shape, so that continuous rolling injection repair is carried out; and meanwhile, the soil loosening assembly is adopted to loosen the soil of the polluted soil, so that the soil clearance is increased.
The in-situ injection repairing equipment used by the method comprises an operation rack, two side fixed connecting pieces, a rolling injection device and a repairing medicament supply unit, wherein the operation rack can be connected with a moving vehicle;
the rolling injection device comprises an external rotary drum horizontally and movably arranged on the fixed connecting pieces at the two sides, a soil loosening assembly movably sleeved on the external rotary drum, and a plurality of groups of injection pipe sets uniformly arranged on the side wall of the external rotary drum and communicated with the repairing medicament supply unit;
the injection tube group comprises a plurality of medicament injection tubes which are arranged side by side;
one end of the medicament injection tube penetrates through the side wall of the external rotary drum, and the other end of the medicament injection tube can be inserted into soil; a negative pressure injection device communicated with the repairing medicament supply unit is arranged at the penetrating end of the medicament injection tube in the external rotary drum;
the negative pressure injection device comprises a central rotating shaft, injection cavities, pistons, connecting rods, crankshafts and a rotating motor, wherein the central rotating shaft is arranged in the external rotating cylinder and is coincident with the central axis of the external rotating cylinder;
the number of the crankshafts is the same as that of the medicament injection pipes of each group of injection pipe groups and corresponds to that of the medicament injection pipes one by one;
the number of the connecting rods which are rotatably arranged on each crankshaft is the same as the number of the groups of the injection tube groups.
Further, the repairing medicament supply unit comprises a medicament storage box for containing an oxidant and an activator, a stirring assembly arranged in the medicament storage box, and a one-way valve arranged at a liquid outlet of the medicament storage box;
the injection cavity is provided with a liquid inlet communicated with the one-way valve and a liquid outlet communicated with the medicament injection tube. The arrangement of the one-way valve can prevent the repair medicament from flowing back to cause pressure relief, so that the injected repair medicament has no penetrating power; the setting through stirring subassembly can make the restoration medicament concentration even, improves the restoration efficiency to soil.
Furthermore, the outer side wall of the medicament injection tube is movably sleeved with a length adjusting tube; an adjusting structure is arranged at the joint of the medicament injection tube and the length adjusting tube;
the joint is fixed at the soil inserting end of the length adjusting pipe; a sealing sliding rod is arranged on the joint in a sliding manner; the lower end of the sealing sliding rod is provided with a conical metal piece for breaking the ground, and the upper end of the sealing sliding rod is provided with a baffle ring connected with the joint through an elastic element;
the side surface of the sealing sliding rod is uniformly provided with atomization diffusion holes communicated with the injection cavity.
The conical metal piece can protect the atomization diffusion holes when entering the soil, so that the atomization diffusion holes are prevented from being blocked by the soil; the conical metal piece is pressed down by the negative pressure provided by the negative pressure injection device to expose the atomization diffusion hole for injecting the remediation agent into the soil; the atomizing diffusion holes spray the repairing medicament in the rolling process of the rolling injection device, and the movement track of the atomizing diffusion holes is in an arc shape, so that the medicament can be diffused out in a sector shape, the diffusion area of the medicament is greatly increased, and the medicament injection efficiency is greatly improved.
Further, the adjusting structure comprises an external thread arranged on the outer side wall of the medicament injection tube, an internal thread arranged on the inner wall of the length adjusting tube, and an anti-loose lock nut arranged on the external thread.
Can realize the change to medicament injection tube length through threaded connection, can adjust the injection medicament degree of depth as required, improve work efficiency.
Further, adjust the structure including setting up perpendicularly the spout of medicament injection pipe outside lateral wall, set up the sliding key who is connected with the spout on length adjustment pipe to and run through the dead bolt of lock that sets up on length adjustment pipe and medicament injection pipe can be connected.
Furthermore, a pressurizing air hole is arranged on the injection cavity; the pressurizing air hole is connected with a pressurizing air pump through a connecting pipe. The air can be filled into the injection cavity through the arrangement of the pressurization air pump, the ejection pressure of the injection medicament is increased, the penetration range of the ejection medicament is improved, and the working efficiency is improved.
Further, the operation frame includes the horizontal stand with both sides fixed connection spare fixed connection, the lower extreme with horizontal stand articulated perpendicular mounting is connected hydraulic telescoping rod on perpendicular mounting upper end and the horizontal stand sets up the engaging lug that can be connected with the moving vehicle on the perpendicular mounting.
The operation frame is arranged to be connected with the mobile vehicle, and the working efficiency of the whole equipment can be effectively improved through carrying of the mobile vehicle.
Further, the soil loosening assembly comprises a rotating sleeve uniformly arranged on the outer rotating cylinder, a soil loosening coulter arranged on the rotating sleeve, and a power motor for providing power for the rotating sleeve.
The setting through the subassembly that loosens the soil can make the soil clearance increase of medicament injection pipe both sides, reduces the resistance that meets after the medicament blowout to a certain extent, improves the diffusion velocity of medicament in soil.
The invention has the beneficial effects that: compared with the traditional in-situ injection method for vertically inserting a single injection medicament tube into soil, the invention provides the in-situ injection restoration method for restoring the soil based on in-situ oxidation, the in-situ injection restoration efficiency of the soil can be greatly improved by inserting a plurality of injection tube groups into the polluted soil in a continuous rolling mode to carry out continuous rolling injection restoration, and the construction period can be effectively shortened aiming at the large-area soil to be restored; according to the in-situ injection repairing equipment provided by the invention, the medicament injection tube is inserted into the soil in the rolling process, so that the medicament injected in the soil is diffused in a sector manner, and the soil is cut by the soil loosening assembly, so that the diffusion area and the diffusion speed of the repairing medicament in the soil are increased, and the working efficiency of injecting the medicament into the soil to realize repairing is improved.
Drawings
FIG. 1 is a schematic structural view of the whole of embodiment 1 of the present invention;
FIG. 2 is a schematic view showing the structure of a negative pressure injection device according to embodiment 1 of the present invention;
FIG. 3 is a schematic view showing the connection of a drug storage container to an injection chamber in accordance with embodiment 1 of the present invention;
FIG. 4 is a schematic structural view of a length-adjusting pipe according to embodiment 1 of the present invention;
FIG. 5 is a schematic structural view of an operation rack in embodiment 3 of the present invention;
wherein, 1-an operating frame, 10-a horizontal bracket, 11-a vertical fixed part, 12-a hydraulic telescopic rod, 13-a connecting lug, 2-a fixed connecting piece at two sides, 3-a rolling injection device, 30-an external rotary drum, 31-a soil loosening component, 310-a rotary sleeve, 311-a soil loosening coulter, 32-an injection tube group, 321-a length adjusting tube, 3210-a joint, 3211-a sealing sliding rod, 3212-a conical metal piece, 3213-an elastic element, 3214-an atomizing diffusion hole, 320-a medicament injection tube, 33-a negative pressure injection device, 323-an anti-loose locking nut, 330-a central rotating shaft, 331-an injection cavity, 332-a piston, 333-a connecting rod, 334-a crankshaft, 335-a rotating motor, 336-a liquid inlet, 337-a pressurization air pump, 4-a repair agent supply unit, 40-an agent storage box, 41-a stirring component and 42-a one-way valve.
Detailed Description
Example 1:
the equipment of the in-situ injection remediation method for remediating soil based on in-situ oxidation as shown in fig. 1 comprises an operation rack 1 which can be connected with a moving vehicle, two side fixed connecting pieces 2 which are arranged on the operation rack 1, a rolling injection device 3 which is movably arranged in the middle of the two side fixed connecting pieces 2 and is horizontally arranged, and a remediation agent supply unit 4 which is communicated with the rolling injection device 3;
the rolling injection device 3 comprises an outer rotary drum 30 horizontally and movably arranged on the fixed connecting pieces 2 at two sides, a soil loosening assembly 31 fixed on the outer rotary drum 30, and 3 groups of injection tube groups 32 uniformly arranged on the side wall of the outer rotary drum 30 and communicated with the repairing medicament supply unit 4;
the syringe group 32 includes 7 medicine syringes 320 arranged side by side;
one end of the medicament injection tube 320 penetrates through the side wall of the outer rotary drum 30, and the other end of the medicament injection tube can be inserted into soil; a negative pressure injection device 33 communicating with the rehabilitation medicine supply unit 4 is provided at the penetrating end of the medicine injection tube 320 inside the outer drum 30;
as shown in fig. 2, the negative pressure injection apparatus 33 includes a central rotary shaft 330 disposed inside the outer drum 30 and coinciding with the central axis of the outer drum 30, injection chambers 331 uniformly disposed on the inner sidewall of the outer drum 30 and communicating with the medicine injection tubes 320 in a one-to-one correspondence, pistons 332 movably disposed in each injection chamber 331, a connecting rod 333 having one end movably connected to the piston 332, a crankshaft 334 rotatably mounted on the other end of the connecting rod 333 and connected to the central rotary shaft 330, and a rotary motor 335 for supplying rotary power to the central rotary shaft 330;
the number of the crankshafts 334 is the same as the number of the medicine injection tubes 320 of each injection tube group 32, and corresponds to one;
the number of connecting rods 333 rotatably provided on each crankshaft 334 is the same as the number of groups of the injection tube groups 32.
As shown in fig. 3, the rehabilitation medicine supply unit 4 includes a medicine storage tank 40 for storing an oxidizer and an activator, an agitation assembly 41 provided in the medicine storage tank 40, and a check valve 42 provided at an outlet of the medicine storage tank 40;
the injection cavity 331 is provided with an inlet 336 communicating with the check valve 42 and an outlet communicating with the drug injection tube 320.
As shown in fig. 4, a length adjusting tube 321 is movably sleeved on the outer side wall of the medicament injection tube 320; an adjusting structure is arranged at the joint of the medicament injection tube 320 and the length adjusting tube 321;
the joint 3210 is fixed at the soil end of the length adjusting pipe 321; a sealing sliding rod 3211 is slidably arranged on the joint 3210; a conical metal piece 3212 for breaking earth is arranged at the lower end of the sealing sliding rod 3211, and a stop ring connected with the joint 3210 through an elastic element 3213 is arranged at the upper end;
the side surface of the sealing sliding rod 3211 is uniformly provided with atomization diffusion holes 3214 communicated with the injection cavity 331.
As shown in fig. 4, the adjusting structure includes an external thread provided on the outer sidewall of the medicine injection tube 320, an internal thread provided on the inner wall of the length adjusting tube 321, and a locknut 323 provided on the external thread.
The injection cavity 331 is provided with a pressurizing air hole; the pressurizing air hole is connected with a pressurizing air pump 337 through a connecting pipe.
This device passes through PLC controller and pressure boost air pump 337, rotation motor 335 electric connection.
Wherein, the movable frame 1 is a fixed connecting plate; ripping assembly 31 is a blade secured to outer drum 30;
the pressurizing air pump 337, the check valve 42, the rotating motor 335, and the PLC controller are commercially available components, and the specific product model can be selected by one skilled in the art as desired.
The method for carrying out in-situ injection repair by the device comprises the following steps:
s1: preparing an oxidation repairing medicament, adding sodium persulfate and deionized water into the medicament storage box 40, and uniformly stirring to ensure that the concentration of the sodium persulfate is 10%;
s2: connecting an operation rack 1 of the in-situ injection repairing equipment with a moving vehicle, carrying a rolling injection device 3 on the moving vehicle to enable the soil surface to roll continuously, and performing repairing operation on the polluted soil;
during the rolling process, the injection tube set 32 is inserted into the polluted soil, the piston 332 in the negative pressure injection device 33 is compressed under the driving of the connecting rod 333, so that the repairing medicament in the medicament storage box 40 enters the soil through the injection cavity 331 and the medicament injection tube 320, and the sodium persulfate solution in a sector shape is sprayed out;
and meanwhile, the soil loosening assembly is adopted to loosen the soil of the polluted soil, so that the soil clearance is increased.
Example 2:
the equipment of the in-situ injection remediation method for remediating soil based on in-situ oxidation as shown in fig. 1 comprises an operation rack 1 which can be connected with a moving vehicle, two side fixed connecting pieces 2 which are arranged on the operation rack 1, a rolling injection device 3 which is movably arranged in the middle of the two side fixed connecting pieces 2 and is horizontally arranged, and a remediation agent supply unit 4 which is communicated with the rolling injection device 3;
the rolling injection device 3 comprises an outer rotary drum 30 horizontally and movably arranged on the fixed connecting pieces 2 at two sides, a soil loosening assembly 31 fixed on the outer rotary drum 30, and 3 groups of injection tube groups 32 uniformly arranged on the side wall of the outer rotary drum 30 and communicated with the repairing medicament supply unit 4;
the syringe group 32 includes 7 medicine syringes 320 arranged side by side;
one end of the medicament injection tube 320 penetrates through the side wall of the outer rotary drum 30, and the other end of the medicament injection tube can be inserted into soil; a negative pressure injection device 33 communicating with the rehabilitation medicine supply unit 4 is provided at the penetrating end of the medicine injection tube 320 inside the outer drum 30;
as shown in fig. 2, the negative pressure injection apparatus 33 includes a central rotary shaft 330 disposed inside the outer drum 30 and coinciding with the central axis of the outer drum 30, injection chambers 331 uniformly disposed on the inner sidewall of the outer drum 30 and communicating with the medicine injection tubes 320 in a one-to-one correspondence, pistons 332 movably disposed in each injection chamber 331, a connecting rod 333 having one end movably connected to the piston 332, a crankshaft 334 rotatably mounted on the other end of the connecting rod 333 and connected to the central rotary shaft 330, and a rotary motor 335 for supplying rotary power to the central rotary shaft 330;
the number of the crankshafts 334 is the same as the number of the medicine injection tubes 320 of each injection tube group 32, and corresponds to one;
the number of connecting rods 333 rotatably provided on each crankshaft 334 is the same as the number of groups of the injection tube groups 32.
As shown in fig. 3, the rehabilitation medicine supply unit 4 includes a medicine storage tank 40 for storing an oxidizer and an activator, an agitation assembly 41 provided in the medicine storage tank 40, and a check valve 42 provided at an outlet of the medicine storage tank 40;
the injection cavity 331 is provided with an inlet 336 communicating with the check valve 42 and an outlet communicating with the drug injection tube 320.
As shown in fig. 4, a length adjusting tube 321 is movably sleeved on the outer side wall of the medicament injection tube 320; an adjusting structure is arranged at the joint of the medicament injection tube 320 and the length adjusting tube 321;
the joint 3210 is fixed at the soil end of the length adjusting pipe 321; a sealing sliding rod 3211 is slidably arranged on the joint 3210; a conical metal member 3212 for breaking earth is arranged at the lower end of the sealing sliding rod 3211, and a stop ring connected with the joint 3210 through an elastic element 3213 is arranged at the upper end;
the side surface of the sealing sliding rod 3211 is uniformly provided with atomization diffusion holes 3214 communicated with the injection cavity 331.
The adjusting structure comprises a sliding groove vertically arranged on the outer side wall of the medicament injection tube 320, a sliding key arranged on the length adjusting tube 321 and connected with the sliding groove, and a dead locking bolt which is arranged on the length adjusting tube 321 in a penetrating manner and can be connected with the medicament injection tube 320.
The injection cavity 331 is provided with a pressurizing air hole; the pressurizing air hole is connected with one 337 through a connecting pipe.
This device passes through PLC controller and pressure boost air pump 337, rotation motor 335 electric connection.
Wherein, the movable frame 1 is a fixed connecting plate; ripping assembly 31 is a blade secured to outer drum 30;
the pressurizing air pump 337, the check valve 42, the rotating motor 335, and the PLC controller are commercially available components, and the specific product model can be selected by one skilled in the art as desired.
The adjusting structure of the medicament injection tube 320 of the device is adjusted in a sliding manner, so that the length of the medicament injection tube 320 can be quickly adjusted, and the working efficiency of adjusting the length of the medicament injection tube 320 can be improved.
Example 3:
the equipment comprises an operation rack 1 which can be connected with a moving vehicle, two side fixed connecting pieces 2 which are arranged on the operation rack 1, a rolling injection device 3 which is movably arranged in the middle of the two side fixed connecting pieces 2 and is horizontally arranged, and a repairing agent supply unit 4 which is communicated with the rolling injection device 3;
the rolling injection device 3 comprises an outer rotary drum 30 horizontally and movably arranged on the fixed connecting pieces 2 at two sides, a scarification component 31 fixed on the outer rotary drum 30, and four groups of injection tube groups 32 uniformly arranged on the side wall of the outer rotary drum 30 and communicated with the repairing medicament supply unit 4;
the syringe group 32 includes 7 medicine syringes 320 arranged side by side;
one end of the medicament injection tube 320 penetrates through the side wall of the outer rotary drum 30, and the other end of the medicament injection tube can be inserted into soil; a negative pressure injection device 33 communicating with the rehabilitation medicine supply unit 4 is provided at the penetrating end of the medicine injection tube 320 inside the outer drum 30;
the negative pressure injection device 33 includes a central rotary shaft 330 disposed inside the outer rotary drum 30 and coinciding with the central axis of the outer rotary drum 30, injection cavities 331 uniformly disposed on the inner sidewall of the outer rotary drum 30 and communicating with the medicine injection tubes 320 in one-to-one correspondence, pistons 332 movably disposed in each injection cavity 331, connecting rods 333 having one ends movably connected to the pistons 332, crankshafts 334 rotatably mounted on the other ends of the connecting rods 333 and connected to the central rotary shaft 330, and a rotary motor 335 for providing rotary power to the central rotary shaft 330;
the number of the crankshafts 334 is the same as the number of the medicine injection tubes 320 of each injection tube group 32, and corresponds to one;
the number of connecting rods 333 rotatably provided on each crankshaft 334 is the same as the number of groups of the injection tube groups 32.
As shown in fig. 3, the rehabilitation medicine supply unit 4 includes a medicine storage tank 40 for storing an oxidizer and an activator, an agitation assembly 41 provided in the medicine storage tank 40, and a check valve 42 provided at an outlet of the medicine storage tank 40;
the injection cavity 331 is provided with an inlet 336 communicating with the check valve 42 and an outlet communicating with the drug injection tube 320.
As shown in fig. 4, a length adjusting tube 321 is movably sleeved on the outer side wall of the medicament injection tube 320; an adjusting structure is arranged at the joint of the medicament injection tube 320 and the length adjusting tube 321;
the joint 3210 is fixed at the soil end of the length adjusting pipe 321; a sealing sliding rod 3211 is slidably arranged on the joint 3210; a conical metal piece 3212 for breaking earth is arranged at the lower end of the sealing sliding rod 3211, and a stop ring connected with the joint 3210 through an elastic element 3213 is arranged at the upper end;
the side surface of the sealing sliding rod 3211 is uniformly provided with atomization diffusion holes 3214 communicated with the injection cavity 331.
The adjusting structure comprises a sliding groove vertically arranged on the outer side wall of the medicament injection tube 320, a sliding key arranged on the length adjusting tube 321 and connected with the sliding groove, and a dead locking bolt which is arranged on the length adjusting tube 321 in a penetrating manner and can be connected with the medicament injection tube 320.
The injection cavity 331 is provided with a pressurizing air hole; the pressurizing air hole is connected with a pressurizing air pump 337 through a connecting pipe.
As shown in fig. 5, the operation frame 1 includes a horizontal bracket 10 fixedly connected to the fixed connection members 2 at both sides, a vertical fixing member 11 having a lower end hinged to the horizontal bracket 10, a hydraulic telescopic rod 12 connecting an upper end of the vertical fixing member 11 to the horizontal bracket 10, and a connection lug 13 provided on the vertical fixing member 11 and connectable to the moving vehicle.
The ripping assembly 31 includes a rotating sleeve 310 uniformly disposed on the outer drum 30, ripper blades 311 disposed on the rotating sleeve 310, and a power motor that powers the rotating sleeve 310.
This device passes through PLC controller and hydraulic telescoping rod 12, motor power, pressure boost air pump 337, rotates motor 335 electric connection.
The hydraulic telescopic rod 12, the power motor, the pressurization air pump 337, the one-way valve 42, the rotation motor 335 and the PLC are commercially available components, and specific product types can be selected by those skilled in the art as required.
The device can adjust the contact distance between the rolling injection device 3 and the soil during the advancing of a moving vehicle through the hydraulic telescopic rod 12, and the depth of the medicament injection tube 320 inserted into the soil can be changed rapidly; the rotation of the soil loosening plough blade 311 is separated from the rotation of the medicament injection pipe 320 through the rotation speed adjustment of the power motor, the rotation speed of the soil loosening plough blade 311 is improved, the soil loosening effect is optimized, the penetration range of medicament injection is improved, and the working efficiency of the whole device is further improved.
Claims (5)
1. An in-situ injection remediation method for remediating soil based on in-situ oxidation is characterized by comprising the following steps:
s1: preparing an oxidation repairing medicament, adding sodium persulfate and deionized water into a medicament storage box, and uniformly stirring to ensure that the concentration of the sodium persulfate is 10%;
s2: connecting the in-situ injection repairing equipment with a mobile vehicle to repair the polluted soil;
a plurality of injection pipes are inserted into the polluted soil in a continuous rolling mode, and meanwhile, a negative pressure injection device is used for enabling the injection pipes inserted into the soil to spray sodium persulfate solution diffused in a sector shape, so that continuous rolling injection repair is carried out; meanwhile, soil loosening assemblies are adopted to loosen polluted soil, so that soil gaps are enlarged;
the in-situ injection repairing equipment used by the method comprises an operation rack (1) capable of being connected with a moving vehicle, two side fixed connecting pieces (2) arranged on the operation rack (1), a rolling injection device (3) movably arranged in the middle of the two side fixed connecting pieces (2) and horizontally arranged, and a repairing agent supply unit (4) communicated with the rolling injection device (3);
the rolling injection device (3) comprises an external rotary drum (30) horizontally and movably mounted on the fixed connecting pieces (2) at the two sides, a soil loosening assembly (31) movably sleeved on the external rotary drum (30), and a plurality of groups of injection pipe sets (32) uniformly arranged on the side wall of the external rotary drum (30) and communicated with the repairing medicament supply unit (4);
the syringe group (32) comprises a plurality of medicament syringes (320) arranged side by side;
one end of the medicament injection tube (320) penetrates through the side wall of the outer rotary drum (30), and the other end of the medicament injection tube can be inserted into soil; a negative pressure injection device (33) communicated with the repair medicament supply unit (4) is arranged at the penetrating end of the medicament injection tube (320) in the outer rotary drum (30);
the negative pressure injection device (33) comprises a central rotating shaft (330) which is arranged in the outer rotary drum (30) and is coincided with the central axis of the outer rotary drum (30), injection cavities (331) which are uniformly arranged on the inner side wall of the outer rotary drum (30) and are communicated with the medicament injection pipes (320) in a one-to-one correspondence mode, a piston (332) which is movably arranged in each injection cavity (331), a connecting rod (333) of which one end is movably connected with the piston (332), a crankshaft (334) which is rotatably arranged at the other end of the connecting rod (333) and is connected with the central rotating shaft (330), and a rotating motor (335) which provides rotating power for the central rotating shaft (330);
the number of the crankshafts (334) is the same as that of the medicament injection pipes (320) of each group of injection pipe sets (32), and the crankshafts correspond to the medicament injection pipes one by one;
the number of the connecting rods (333) which are arranged on each crankshaft (334) in a rotating way is the same as that of the injection tube groups (32);
the outer side wall of the medicament injection tube (320) is movably sleeved with a length adjusting tube (321); an adjusting structure is arranged at the joint of the medicament injection tube (320) and the length adjusting tube (321);
the end of the length adjusting pipe (321) inserted into the soil end is provided with a joint (3210); a sealing sliding rod (3211) is arranged on the joint (3210) in a sliding manner; the lower end of the sealing sliding rod (3211) is provided with a conical metal piece (3212) for breaking earth, and the upper end of the sealing sliding rod is provided with a baffle ring connected with a joint (3210) through an elastic element (3213);
the side surface of the sealing sliding rod (3211) is uniformly provided with atomization diffusion holes (3214) communicated with the injection cavity (331);
the adjusting structure comprises external threads arranged on the outer side wall of the medicament injection tube (320), internal threads arranged on the inner wall of the length adjusting tube (321), and an anti-loose lock nut (323) arranged on the external threads;
the soil loosening assembly (31) comprises a rotating sleeve (310) uniformly arranged on an outer drum (30), a soil loosening plough blade (311) arranged on the rotating sleeve (310), and a power motor for providing power for the rotating sleeve (310).
2. The in-situ injection remediation method for soil based on in-situ oxidation according to claim 1, wherein the remediation drug supply unit (4) comprises a drug storage tank (40) for storing an oxidant and an activator, an agitation assembly (41) disposed in the drug storage tank (40), and a one-way valve (42) disposed at a liquid outlet of the drug storage tank (40);
the injection cavity (331) is provided with a liquid inlet (336) communicated with the one-way valve (42) and a liquid outlet communicated with the medicament injection tube (320).
3. The in-situ injection restoration method for restoring soil based on in-situ oxidation as claimed in claim 1, wherein the adjusting structure comprises a chute vertically arranged on the outer side wall of the medicament injection tube (320), a sliding key arranged on the length adjusting tube (321) and connected with the chute, and a dead-locking bolt arranged on the length adjusting tube (321) and connected with the medicament injection tube (320) in a penetrating manner.
4. The in-situ injection remediation method based on in-situ oxidation remediation of soil according to claim 1, wherein the injection cavity (331) is provided with a pressurization air hole; the pressurizing air hole is connected with a pressurizing air pump (337) through a connecting pipe.
5. The in-situ injection restoration method based on in-situ oxidation restoration of soil according to claim 1, characterized in that the operation frame (1) comprises a horizontal bracket (10) fixedly connected with the fixed connecting pieces (2) at two sides, a vertical fixing piece (11) hinged with the horizontal bracket (10) at the lower end, a hydraulic telescopic rod (12) connecting the upper end of the vertical fixing piece (11) and the horizontal bracket (10), and a connecting lug (13) arranged on the vertical fixing piece (11) and capable of being connected with a moving vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111109714.2A CN113770171B (en) | 2021-09-18 | 2021-09-18 | In-situ injection remediation method for remediating soil based on in-situ oxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111109714.2A CN113770171B (en) | 2021-09-18 | 2021-09-18 | In-situ injection remediation method for remediating soil based on in-situ oxidation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113770171A CN113770171A (en) | 2021-12-10 |
| CN113770171B true CN113770171B (en) | 2022-06-10 |
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