Soil heavy metal solidifying agent atomization penetration reaction device

Abstract

The present application relates to the technical field of soil pollution remediation, and provides a soil heavy metal solidifying agent atomization and penetration reaction device, which comprises an air source assembly, a liquid supply assembly, a multi-stage atomization assembly, an injection assembly and a negative pressure suction assembly. The air source assembly is used for conveying compressed gas; the liquid supply assembly is used for storing and conveying liquid soil heavy metal solidifying agent; the inlet end of the multi-stage atomization assembly is communicated with the outlet of the air source assembly and the outlet of the liquid supply assembly, and is used for outputting micron-sized solidifying agent aerosol; the inlet end of the injection assembly is communicated with the outlet of the multi-stage atomization assembly, and is used for conveying the solidifying agent aerosol to the target depth of soil; and the negative pressure suction assembly is arranged on the injection assembly, and is used for forming a low-pressure area in the soil area around the injection assembly. The present application solves the problems of uneven distribution of the medicament and large damage to the soil structure in the existing device, and realizes low disturbance, deep-level, uniform dispersion and efficient reaction of the medicament in the soil.

Description

Technical Field

[0001] This invention relates to the field of soil pollution remediation technology, and in particular to a soil heavy metal solidification agent atomization infiltration reaction device. Background Technology

[0002] In the remediation of heavy metal pollution in soil, in-situ solidification and stabilization technology involves adding chemical agents to the soil to stabilize heavy metals, thereby reducing their mobility and bioavailability.

[0003] Currently, common pesticide application devices mainly employ mechanical mixing or high-pressure injection. Mechanical mixing devices use equipment such as excavators and plows to mix the topsoil with the pesticide; high-pressure injection devices use direct-push injection equipment to force liquid pesticides into the soil at a specific depth in the form of streams, forming localized pesticide enrichment zones.

[0004] Existing devices all rely on external mechanical force to forcibly disperse the agent. The distribution range and morphology are strictly limited by the mechanical action, making it difficult to achieve truly uniform dispersion in heterogeneous soils. This can easily lead to the formation of agent clumps or dominant channels, resulting in remediation blind spots. Summary of the Invention

[0005] This invention provides a soil heavy metal solidification agent atomization and infiltration reaction device to solve the problems of uneven agent distribution and significant damage to soil structure in existing devices, and achieves low disturbance, deep and uniform dispersion and efficient reaction of the agent in the soil.

[0006] This invention provides a soil heavy metal solidification agent atomization and infiltration reaction device, comprising:

[0007] Gas supply assembly, used to deliver compressed gas;

[0008] Liquid supply assembly for storing and delivering liquid soil heavy metal solidification agent;

[0009] A multi-stage atomizing component, wherein the inlet of the multi-stage atomizing component is connected to the outlet of the gas source component and the outlet of the liquid supply component, and is used to mix the soil heavy metal solidifying agent with the compressed gas and break it down stage by stage, and finally output micron-sized solidifying agent aerosol.

[0010] An injection component, the inlet of which is connected to the outlet of the multi-stage atomization component, is used to deliver the curing agent aerosol to the target depth in the soil;

[0011] A negative pressure suction component is disposed on the outer periphery of the injection component to form a low-pressure zone in the soil region surrounding the injection component.

[0012] According to the present invention, a soil heavy metal solidification agent atomization and infiltration reaction device is provided, wherein the multi-stage atomization component includes:

[0013] Atomizing body;

[0014] A multi-stage atomizing component is disposed inside the atomizing body, and the first end of the multi-stage atomizing component is connected to the gas source component and the liquid supply component;

[0015] A pneumatic sieving and reflux component is disposed inside the atomizing body. The first end of the pneumatic sieving and reflux component is connected to the second end of the multi-stage atomizing component, and the second end of the pneumatic sieving and reflux component is connected to the injection component.

[0016] According to the present invention, a soil heavy metal solidification agent atomization and infiltration reaction device is provided, wherein the multi-stage atomization component includes a first-stage pre-atomization chamber, a second-stage swirling acceleration chamber and a third-stage ultrasonic resonant chamber connected in sequence.

[0017] The end of the primary pre-atomization chamber furthest from the secondary swirling acceleration chamber is connected to the gas source assembly and the liquid supply assembly;

[0018] The end of the third-stage ultrasonic resonant cavity away from the second-stage swirling acceleration cavity is connected to the pneumatic sieving and reflux component.

[0019] The inner wall of the secondary swirling acceleration chamber is provided with a spiral guide groove;

[0020] The internal structure of the three-stage ultrasonic resonant cavity is equipped with a resonant ring.

[0021] According to the present invention, a soil heavy metal solidification agent atomization and infiltration reaction device is provided, wherein the multi-stage atomization component further includes:

[0022] The air source input pipe has one end embedded inside the atomizing body and connected to the first-stage pre-atomizing chamber, and the other end located outside the atomizing body and connected to the air source assembly.

[0023] The curing agent input pipe is spaced apart from the gas source input pipe. One end is embedded inside the atomizing body and communicates with the first-stage pre-atomizing chamber, while the other end is located outside the atomizing body and communicates with the liquid supply component.

[0024] The gas source input pipe and the curing agent input pipe are located at one end inside the atomizing body and are arranged at an angle.

[0025] According to the present invention, a soil heavy metal solidification agent atomization and infiltration reaction device is provided, wherein the pneumatic screening and reflux component comprises:

[0026] The pneumatic sieving chamber is located inside the atomizing body, with one end connected to the injection component and the other end connected to the three-stage ultrasonic resonant cavity through a connecting pipe;

[0027] A return pipe is located inside the atomizing body, with one end connected to the primary pre-atomizing chamber and the other end connected to the pneumatic sieving chamber.

[0028] A tangential secondary air duct is located inside the atomizing body, with one end connected to the pneumatic sieving chamber and tilted upward at a predetermined angle; the other end is connected to the air source assembly.

[0029] According to the present invention, a soil heavy metal solidification agent atomization infiltration reaction device is provided, wherein the injection assembly includes an atomization injection probe, the atomization injection probe being connected to the outlet of the pneumatic sieving chamber via an atomization injection hose, the outlet of the pneumatic sieving chamber being located on the centerline of the pneumatic sieving chamber; the atomization injection probe includes:

[0030] A hollow tube has an internal cavity, the atomizing injection hose is connected to the top of the cavity, the bottom of the hollow tube is provided with a soil-breaking cone, and the side wall of the hollow tube is provided with several atomizing nozzles.

[0031] A pressure-applying component is located at the top of the hollow tube.

[0032] According to the present invention, a soil heavy metal solidification agent atomization and infiltration reaction device is provided, wherein the negative pressure suction component includes:

[0033] Vacuum pump;

[0034] At least one porous negative pressure ring sleeve; when there are two or more porous negative pressure ring sleeves, the porous negative pressure ring sleeves are spaced apart along the length direction of the hollow tube and are connected in sequence through a connecting tube.

[0035] The suction hose is connected at one end to the vacuum pump and at the other end to the porous negative pressure ring.

[0036] According to the present invention, a soil heavy metal solidification agent atomization and infiltration reaction device is provided, wherein the porous negative pressure ring includes:

[0037] The ring-shaped body has a vacuum chamber inside, and a number of vacuum nozzles are provided on the inner wall. The vacuum nozzles are connected to the vacuum chamber.

[0038] A limiting component, located inside the ring body, is used to connect with the hollow tube;

[0039] Several support members are arranged in a circular array around the outer periphery of the limiting member, with one end fixedly connected to the limiting member and the other end fixedly connected to the ring body.

[0040] According to the present invention, a soil heavy metal solidification agent atomization and infiltration reaction device is provided, wherein the gas source component includes:

[0041] Air compressor;

[0042] The airflow duct assembly includes:

[0043] One end of the main gas supply pipe is connected to the air compressor;

[0044] A three-way air valve is connected to the other end of the main gas supply pipe;

[0045] The first gas supply branch pipe has one end connected to the first outlet of the three-way valve and the other end connected to the gas source input pipe.

[0046] The second gas supply branch pipe is connected at one end to the second outlet of the three-way valve and at the other end to the tangential secondary air duct.

[0047] A gas heating dryer is connected to the main gas supply pipe.

[0048] According to the present invention, a soil heavy metal solidification agent atomization and infiltration reaction device is provided, wherein the liquid supply component includes:

[0049] Curing agent storage tank;

[0050] The infusion tube is connected at one end to the curing agent storage tank and at the other end to the curing agent input tube;

[0051] A metering pump is connected to the infusion pipe.

[0052] This invention provides a soil heavy metal solidification agent atomization and infiltration reaction device. Through a multi-stage atomization component, the soil heavy metal solidification agent is broken down into micron-sized aerosols. These micron-sized aerosols have a huge specific surface area, extremely high activity, and their size is much smaller than most soil pores, providing the physical conditions for free migration within soil pores. This reduces the flow resistance of the heavy metal solidification agent in the soil, facilitating deep penetration. Secondly, a negative pressure suction component creates a low-pressure zone around the injection point, generating directional airflow that promotes uniform dispersion of the aerosol and reduces physical disturbance to the soil structure. This increases the contact area between the aerosol and the soil, enhancing the reaction efficiency with soil heavy metals and achieving low-disturbance, deep, uniform dispersion and efficient reaction. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the structure of the soil heavy metal solidification agent atomization and infiltration reaction device provided by the present invention.

[0055] Figure 2 This is a cross-sectional view of the multi-stage atomization component of the soil heavy metal solidification agent atomization and infiltration reaction device provided by the present invention.

[0056] Figure 3 This is an assembly diagram of the atomizing injection probe and the porous negative pressure ring of the soil heavy metal solidification agent atomizing infiltration reaction device provided by the present invention.

[0057] Figure 4 This is a schematic diagram of the atomization injection probe of the soil heavy metal solidification agent atomization infiltration reaction device provided by the present invention.

[0058] Figure 5 This is a schematic diagram of the porous negative pressure ring of the soil heavy metal solidification agent atomization and infiltration reaction device provided by the present invention.

[0059] Figure 6 This is a top view of the porous negative pressure ring of the soil heavy metal solidification agent atomization and infiltration reaction device provided by the present invention.

[0060] Figure 7 yes Figure 6 A cross-sectional view along the AA direction.

[0061] Figure label:

[0062] 100: Gas source assembly; 110: Air compressor; 120: Gas heating dryer; 130: Airflow piping assembly; 131: Main gas supply pipe; 132: Three-way valve; 133: First gas supply branch pipe; 134: Second gas supply branch pipe;

[0063] 200: Liquid supply assembly; 210: Hardener storage tank; 220: Metering pump; 230: Infusion tubing;

[0064] 300: Multi-stage atomizing component; 310: Atomizing body; 320: Multi-stage atomizing part; 321: Primary pre-atomizing chamber; 322: Secondary vortex acceleration chamber; 323: Spiral guide groove; 324: Tertiary ultrasonic resonant cavity; 325: Resonant ring; 330: Pneumatic sieving and reflux component; 331: Pneumatic sieving chamber; 332: Reflux pipe; 333: Tangential secondary air duct; 334: Connecting pipe; 340: Air source input pipe; 350: Curing agent input pipe;

[0065] 400: Injection assembly; 410: Atomizing injection hose; 420: Atomizing injection probe; 421: Pressure application component; 422: Hollow tube; 423: Atomizing nozzle; 424: Soil-breaking cone;

[0066] 500: Negative pressure suction assembly; 510: Vacuum pump; 520: Suction hose; 530: Porous negative pressure ring; 531: Ring body; 532: Vacuum chamber; 533: Vacuum nozzle; 535: Support component; 536: Limiting component; 537: Sharp part; 540: Connecting tube;

[0067] 600: Carrier. Detailed Implementation

[0068] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0069] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0070] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0071] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] The following is combined Figures 1-7 Describe the structure and working principle of the present invention.

[0074] Reference Figure 1 The present invention provides a soil heavy metal solidification agent atomization and infiltration reaction device, comprising a gas source component 100, a liquid supply component 200, a multi-stage atomization component 300, an injection component 400, and a negative pressure suction component 500. The gas source component 100 is used to transport compressed gas; the liquid supply component 200 is used to store and transport liquid soil heavy metal solidification agent; the inlet end of the multi-stage atomization component 300 is connected to the outlet of the gas source component 100 and the outlet of the liquid supply component 200, for mixing the soil heavy metal solidification agent with the compressed gas and breaking it down stage by stage, ultimately outputting micron-sized solidification agent aerosol; the inlet end of the injection component 400 is connected to the outlet of the multi-stage atomization component 300, for transporting the solidification agent aerosol to the target soil depth; the negative pressure suction component 500 is disposed on the outer periphery of the injection component 400, for forming a low-pressure zone in the soil region surrounding the injection component 400.

[0075] During operation, the injection component 400 and the negative pressure suction component 500 are first inserted into the soil to the target depth. Simultaneously, the gas source component 100 and the liquid supply component 200 are activated, delivering compressed gas and liquid soil heavy metal solidifying agent to the multi-stage atomization component 300. The multi-stage atomization component 300 mixes the compressed gas and liquid soil heavy metal solidifying agent and breaks them down in stages to form micron-sized solidifying agent aerosols (particle size 1–10 μm). The aerosols are then delivered to the target soil depth via the injection component 400. Simultaneously, the negative pressure suction component 500 is activated, creating a low-pressure zone in the soil surrounding the injection component 400. A pressure gradient is formed between the low-pressure zone and the high-pressure zone (near the injection component 400), which is the primary driving force for the migration of the aerosol agent. Under the influence of the pressure difference, the aerosol agent spontaneously moves from the high-pressure zone to the low-pressure zone (i.e., around the injection point). This process relies mainly on the pressure difference of the fluid and soil capillary action, rather than traditional mechanical agitation. It should be noted that low-pressure areas and high-pressure areas are relative terms. Low-pressure areas are below the pressure of the surrounding atmosphere, while high-pressure areas are above the pressure of the surrounding atmosphere.

[0076] This invention utilizes a multi-stage atomization component 300 to break down soil heavy metal solidification agents into micron-sized aerosols. These micron-sized aerosols have a huge specific surface area, extremely high activity, and a size much smaller than most soil pores, enabling them to migrate freely within soil pores. This reduces the flow resistance of the heavy metal solidification agent in the soil, facilitating deep penetration. Secondly, a negative pressure suction component 500 creates a low-pressure zone around the injection point, generating directional airflow that promotes uniform dispersion of the aerosols and reduces physical disturbance to the soil structure. This increases the contact area between the aerosols and the soil, enhancing the reaction efficiency with soil heavy metals and achieving low-disturbance, deep, uniform dispersion and efficient reaction.

[0077] Reference Figure 2 In some embodiments of the present invention, the multi-stage atomizing assembly 300 includes an atomizing body 310, a multi-stage atomizing component 320, and a pneumatic sieving and reflux component 330. The multi-stage atomizing component 320 is disposed inside the atomizing body 310, and its first end is connected to the air source assembly 100 and the liquid supply assembly 200. The pneumatic sieving and reflux component 330 is disposed inside the atomizing body 310, and its first end is connected to the second end of the multi-stage atomizing component 320, while the second end of the pneumatic sieving and reflux component 330 is connected to the injection assembly 400.

[0078] In use, the compressed gas supplied by the gas source component 100 and the liquid soil heavy metal solidifying agent supplied by the liquid supply component 200 first enter the first end of the multi-stage atomizing component 320; then the multi-stage atomizing component 320 breaks down the mixed fluid step by step to form an aerosol; this aerosol then enters the first end of the pneumatic sieving and reflux component 330; the pneumatic sieving and reflux component 330 delivers the micron-sized aerosol that meets the particle size requirements from its second end to the injection component 400, while separating the larger droplets that do not meet the particle size requirements and guiding them back to the inlet end of the multi-stage atomizing component 320 for re-atomization.

[0079] In this embodiment, a multi-stage atomizing component 320 mechanically breaks down the fluid in stages, initially reducing the droplet size. A pneumatic sieving and reflux component 330 utilizes the centrifugal separation principle of gas dynamics to dynamically sieve the atomized particles, ensuring that only micron-sized aerosols with acceptable particle size are output, while unacceptable particles are returned to the atomization front end for secondary processing. This design achieves continuous closed-loop operation of the atomization and sieving processes, guaranteeing the uniformity and stability of the output aerosol particle size.

[0080] Reference Figure 2 In some embodiments of the present invention, the multi-stage atomizing component 320 includes a primary pre-atomizing chamber 321, a secondary swirling acceleration chamber 322, and a tertiary ultrasonic resonant chamber 324 connected in sequence. The end of the primary pre-atomizing chamber 321 away from the secondary swirling acceleration chamber 322 is connected to the gas source assembly 100 and the liquid supply assembly 200; the end of the tertiary ultrasonic resonant chamber 324 away from the secondary swirling acceleration chamber 322 is connected to the pneumatic sieving and reflux component 330; the inner wall of the secondary swirling acceleration chamber 322 is provided with a spiral guide groove 323; and the interior of the tertiary ultrasonic resonant chamber 324 is provided with a resonant ring 325.

[0081] Specifically, the primary pre-atomization chamber 321 includes an inlet section, a mixing section, and a first funnel section arranged sequentially from top to bottom. Both the inlet section and the mixing section are cylindrical structures, while the first funnel section has an inverted conical structure, meaning its cross-section decreases sequentially from top to bottom. The cross-section of the mixing section is the same as the cross-section at the top of the first funnel section. The secondary swirling acceleration chamber 322 includes a swirling section and a second funnel section arranged sequentially from top to bottom. The swirling section has a cylindrical structure, or it can be an inverted conical structure. Spiral guide grooves 323 are disposed on the inner wall of the swirling section, and multiple spiral guide grooves 323 can be arranged side-by-side. The second funnel section has an inverted conical structure.

[0082] The resonant ring 325 can be made of high-hardness, corrosion-resistant, and erosion-resistant metal materials (such as tungsten carbide or 316L stainless steel) or high-performance ceramics (such as zirconium oxide) through precision CNC machining or powder metallurgy. It is fixedly installed on the inner wall of the third-stage ultrasonic resonant cavity 324 via interference fit or threaded connection, with its central axis coaxial with the axes of the second-stage vortex acceleration cavity 322 and the third-stage ultrasonic resonant cavity 324. The resonant ring 325 has a U-shaped annular groove in its cross-section, which, together with the inner wall of the third-stage ultrasonic resonant cavity 324, forms a continuous "Helmholtz resonant cavity" surrounding the airflow channel. The leading edge of the resonant ring 325 facing the incoming flow direction is provided with a sharp cutting edge. The angle of this cutting edge must be designed to ensure that a stable and strong Karman vortex street is generated downstream when the gas-liquid two-phase flow passes through it. The cutting edge geometry can be wedge-shaped, circular, or elliptical, preferably with a high Strouhal number to induce high-intensity vortex shedding at lower flow rates. The inner wall of the resonant ring 325 opposite the cutting edge acts as an acoustic reflector, which effectively reflects and focuses the acoustic energy generated in the Helmholtz resonant cavity onto the central airflow channel region of the third-order ultrasonic resonant cavity 324, forming a high-intensity, high-energy-density ultrasonic standing wave field, thereby maximizing its fragmentation efficiency on the flowing droplets.

[0083] When the compressed gas supplied by the gas source component 100 and the liquid soil heavy metal solidifying agent supplied by the liquid supply component 200 enter the primary pre-atomization chamber 321, they undergo preliminary mixing and breakup to form coarse droplets. The mixed fluid then enters the secondary vortex acceleration chamber 322, where the spiral guide grooves 323 on the inner wall force the fluid to rotate at high speed. Under strong centrifugal force and collision, the coarse droplets are further sheared and refined. Finally, the fluid enters the tertiary ultrasonic resonant chamber 324 and impacts the sharp edge of the resonant ring 325, generating a Karman vortex street with a pressure pulse frequency of f1. This pressure pulse frequency f1 acoustically couples and resonates with the natural frequency f0 determined by the Helmholtz resonant cavity structure (frequency locking effect). The strong ultrasonic waves generated by the resonance are focused onto the central flow channel by the acoustic reflection surface, performing ultrasonic breakup on the droplets. Due to the high energy density and uniform distribution of the ultrasonic field generated by the resonant ring 325, it is possible to produce micron / submicron-sized aerosols with smaller particle size and more concentrated distribution.

[0084] Reference Figure 2In some embodiments of the present invention, the multi-stage atomizing assembly 300 further includes an air source input pipe 340 and a curing agent input pipe 350. One end of the air source input pipe 340 is embedded inside the atomizing body 310 and communicates with the primary pre-atomizing chamber 321, while the other end is located outside the atomizing body 310 and communicates with the air source assembly 100. The curing agent input pipe 350 is spaced apart from the air source input pipe 340, with one end embedded inside the atomizing body 310 and communicates with the primary pre-atomizing chamber 321, and the other end located outside the atomizing body 310 and communicates with the liquid supply assembly 200. The ends of the air source input pipe 340 and the curing agent input pipe 350 located inside the atomizing body 310 are arranged at an angle.

[0085] Specifically, the air source input pipe 340 is made of stainless steel. One end of it is fixedly embedded in the side wall of the atomizing body 310 by threaded connection or welding and extends into the first-stage pre-atomization chamber 321. The opening of this end faces the central area of ​​the first-stage pre-atomization chamber 321. The other end is located outside the atomizing body 310 and is sealed to a pressure-resistant pipe from the air source assembly 100 via a quick connector. The curing agent input pipe 350 is made of polytetrafluoroethylene and passes through the side wall of the atomizing body 310 parallel to and spaced apart from the air source input pipe 340, and is fixed by mechanical clamping. The end of the curing agent input pipe 350 located inside the atomizing body 310 also extends into the first-stage pre-atomization chamber 321, but its opening direction forms an acute angle with the opening direction of the air source input pipe 340. This angle allows the two fluid streams to collide and impact within the first-stage pre-atomization chamber 321. In another configuration, the ends of the air source input pipe 340 and the curing agent input pipe 350 located inside the atomizing body 310 can also be set at a vertical angle. In this case, the fluid jet direction of the air source input pipe 340 is perpendicular to the fluid jet direction of the curing agent input pipe 350, and the shearing effect of the high-speed airflow is used to tear the liquid flow.

[0086] During use, the high-pressure gas generated by the gas source component 100 is injected into the primary pre-atomization chamber 321 at a high speed through the gas source input pipe 340; at the same time, the liquid soil heavy metal solidifying agent delivered by the liquid supply component 200 is delivered to the primary pre-atomization chamber 321 through the solidifying agent input pipe 350; the two fluids collide and mix in the chamber due to the angle between them, and the gas exerts an impact and shearing effect on the liquid, completing the initial atomization process.

[0087] In this embodiment, the gas source input pipe 340 and the curing agent input pipe 350 are arranged at an angle within the primary pre-atomization chamber 321. This allows for direct collision and shearing between the high-speed gas and the liquid curing agent within the chamber, utilizing the gas's kinetic energy to instantly break up the liquid, achieving efficient energy transfer and initial atomization. This design is simple in structure and achieves primary liquid breakup without moving parts, laying a solid foundation for subsequent multi-stage fine atomization and helping to improve the particle size uniformity and atomization efficiency of the final aerosol.

[0088] Reference Figure 2 In some embodiments of the present invention, the pneumatic sieving and reflux component 330 includes a pneumatic sieving chamber 331, a reflux pipe 332, and a tangential secondary air duct 333. The pneumatic sieving chamber 331 is located inside the atomizing body 310, with its top end connected to the injection component 400 and its bottom end connected to the third-stage ultrasonic resonant cavity 324 via a connecting pipe 334. The reflux pipe 332 is located inside the atomizing body 310, with its top end connected to the first-stage pre-atomizing cavity 321 and its bottom end connected to the pneumatic sieving chamber 331. The tangential secondary air duct 333 is located inside the atomizing body 310, with its bottom end connected to the pneumatic sieving chamber 331 and inclined upwards at a predetermined angle; its top end is connected to the air source component 100. Specifically, the reflux pipe 332, the tangential secondary air duct 333, and the connecting pipe 334 are all flow channels opened inside the atomizing body 310.

[0089] During operation, the aerosol processed by the three-stage ultrasonic resonant cavity 324 enters the bottom of the pneumatic sieving chamber 331 through the connecting pipe 334. Simultaneously, the auxiliary airflow provided by the air source component 100 is injected tangentially into the upper part of the pneumatic sieving chamber 331 through the tangential secondary air duct 333, forming a rotating upward airflow within the chamber. Fine aerosol particles are carried by the airflow from the top of the pneumatic sieving chamber 331 to the injection component 400, while coarse droplets, due to their greater weight, impact the chamber wall under centrifugal force and fall along the wall surface, returning to the primary pre-atomization chamber 321 through the return pipe 332.

[0090] This embodiment integrates the return pipe 332, tangential secondary air duct 333, and connecting pipe 334 into the internal flow channel structure of the atomizing body 310, eliminating external connecting pipes and reducing leakage risk and flow resistance loss. The one-piece molded flow channel structure ensures airtightness and flow channel shape accuracy, making airflow more stable and controllable. The inclined design of the tangential secondary air duct 333 enhances the swirling effect within the pneumatic sieving chamber 331. The arrangement of the return pipe 332 ensures that coarse particles can smoothly return to the primary atomization stage, achieving a highly efficient closed-loop atomization process.

[0091] Reference Figure 1 , Figure 3 and Figure 4In some embodiments of the present invention, the injection assembly 400 includes an atomizing injection probe 420, which is connected to the outlet of the pneumatic sieving chamber 331 via an atomizing injection hose 410. The outlet of the pneumatic sieving chamber 331 is located on the center line of the pneumatic sieving chamber 331. The atomizing injection probe 420 includes a hollow tube 422 and a pressure applying element 421. The hollow tube 422 has a cavity inside, and the atomizing injection hose 410 is connected to the top of the cavity. The bottom end of the hollow tube 422 is provided with a soil-breaking cone 424, and the side wall of the hollow tube 422 is provided with a plurality of atomizing nozzles 423. The pressure applying element 421 is provided at the top of the hollow tube 422 for inserting the hollow tube 422 into the soil.

[0092] Specifically, the atomizing injection hose 410 is made of pressure-resistant and wear-resistant polyurethane composite material. One end of it is sealed to the standard interface at the centerline outlet of the pneumatic screening chamber 331 via a stainless steel compression fitting, and the other end is detachably connected to the inlet at the top of the hollow tube 422 via a quick-connect fitting. The hollow tube 422 is made of high-strength precipitation-hardening stainless steel, and its internal cavity is a continuous cylindrical channel. The bottom end of the hollow tube 422 is welded to a soil-breaking cone 424, which is made of hard alloy material and has a tip structure to facilitate soil penetration. In some possible embodiments, the atomizing nozzle 423 is a slanted channel formed by precision drilling, and its centerline forms a 30-45 degree angle with the axis of the hollow tube 422. The pressure-applying component 421 is a forged carbon steel impact ring sleeved on the top of the hollow tube 422, and is fixed in the annular groove on the outer wall of the hollow tube 422 by double-set screws. In some possible embodiments, the pressure-applying component 421 can also be set outside the hollow tube 422 in a sliding fit manner, and fixed at different height positions by adjusting bolts to meet the needs of different insertion depths.

[0093] During use, first, reliably connect the atomizing injection hose 410 to the top of the hollow tube 422; the operator aligns the soil-breaking cone 424 with the predetermined injection point, and applies pressure to the pressure application component 421 by hammering or hydraulic device, so that the hollow tube 422 is gradually inserted into the soil to the target depth; after insertion, the system is started so that the aerosol enters the internal cavity of the hollow tube 422 through the atomizing injection hose 410, and finally seeps evenly into the surrounding soil area from the atomizing nozzle 423.

[0094] In this embodiment, the design of the soil-breaking cone 424 effectively reduces the soil insertion resistance. Combined with the stable force application point provided by the pressure application component 421, it achieves insertion with minimal disturbance to the soil. The multiple oblique atomizing nozzles 423 set on the side wall of the hollow tube 422 enable the aerosol to seep out in a multi-angle radial diffusion manner, avoiding soil structure damage caused by concentrated spraying in a single direction and ensuring the three-dimensional uniform distribution of the agent in the soil.

[0095] In some other possible embodiments, an ultrasonic vibrator can be installed inside the soil-breaking cone 424 to vibrate the soil after it is inserted, thereby loosening the soil in denser areas and facilitating the diffusion of aerosols.

[0096] Reference Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 7 In some embodiments of the present invention, the negative pressure suction assembly 500 includes a vacuum pump 510, a suction hose 520, and at least one porous negative pressure ring 530. When there are two or more porous negative pressure rings 530, the porous negative pressure rings 530 are spaced apart along the length of the hollow tube 422 and sequentially connected by a connecting pipe 540. One end of the suction hose 520 is connected to the vacuum pump 510, and the other end is connected to the porous negative pressure ring 530. The porous negative pressure ring 530 includes a ring body 531, a plurality of support members 535, and limiting members 536. The ring body 531 has a vacuum chamber 532 inside, and a number of vacuum nozzles 533 are provided on the inner wall. The vacuum nozzles 533 are connected to the vacuum chamber 532. The limiting member 536 is located inside the ring body 531 and is used to connect with the hollow tube 422. The support member 535 is arranged in a circumferential array on the outer periphery of the limiting member 536, and one end is fixedly connected to the limiting member 536, and the other end is fixedly connected to the ring body 531.

[0097] Specifically, the ring body 531 is a frame structure integrally formed from stainless steel through precision casting. Its shape can be rectangular, triangular, circular, polygonal, etc., and its outer surface is polished to reduce soil friction resistance. The ring body 531 is fixedly connected to the support member 535 via its inner wall. This connection is achieved through welding for permanent fixation, ensuring structural integrity and reliable force transmission. The wall thickness of the ring body 531 is designed according to soil hardness conditions, minimizing weight while ensuring structural strength. In some possible embodiments, a sharp point 537 can be provided at the leading edge of the ring body 531, facilitating insertion into the soil. The orifice edge of the vacuum nozzle 533 is chamfered to prevent soil particle blockage.

[0098] During use, the ring body 531 is inserted into the soil along with the hollow tube 422. Its good rigidity ensures that it will not deform during the insertion process. When it is inserted to the predetermined depth, the vacuum pump 510 is started. The vacuum chamber 532 inside the ring body 531 forms a sealed negative pressure area with the surrounding soil through the vacuum nozzle 533. The metal ring body 531 maintains its shape stability in the soil, ensuring that the negative pressure effect is continuous and effective.

[0099] This embodiment significantly improves the structural strength and wear resistance of the component by using metal to manufacture the ring body 531, enabling it to adapt to insertion operations under various soil hardness conditions. The rigidity of the metal material ensures that the ring body 531 maintains its shape integrity during insertion, avoiding the risk of deformation. The good surface finish reduces insertion resistance while ensuring sealing performance in contact with the soil, providing a reliable guarantee for the effective transmission of negative pressure.

[0100] In other possible embodiments, the ring body 531 may be equipped with a replaceable wear-resistant head, which is fixed to the front end of the ring body 531 by a threaded connection; the wear-resistant head is made of hard alloy material, and its outer surface may be provided with drag-reducing texture. This embodiment, through the replaceable wear-resistant head design, enables the device to adapt to soil environments containing hard impurities such as gravel. When the wear-resistant head wears out, it can be replaced individually, reducing maintenance costs; the drag-reducing texture design further improves insertion performance and increases operating efficiency in cohesive soils.

[0101] Reference Figure 1 In some embodiments of the present invention, the gas source assembly 100 includes an air compressor 110, a gas heating dryer 120, and an airflow duct assembly 130. The airflow duct assembly 130 includes a main gas supply pipe 131, a three-way valve 132, a first gas supply branch pipe 133, and a second gas supply branch pipe 134. One end of the main gas supply pipe 131 is connected to the air compressor 110; the three-way valve 132 is connected to the other end of the main gas supply pipe 131; one end of the first gas supply branch pipe 133 is connected to the first outlet of the three-way valve 132, and the other end is connected to the gas source input pipe 340; one end of the second gas supply branch pipe 134 is connected to the second outlet of the three-way valve 132, and the other end is connected to the tangential secondary air duct 333; the gas heating dryer 120 is connected to the main gas supply pipe 131.

[0102] Specifically, the outlet of the air compressor 110 is sealed to one end of the main gas supply pipe 131 via a flange connection. The gas-heated dryer 120 is fixedly installed on the main gas supply pipe 131 via a bracket. It uses electric heating to heat and dehumidify the compressed air, and its housing is made of stainless steel to ensure pressure resistance and corrosion resistance. The main gas supply pipe 131 is made of aluminum alloy and has interfaces for a pressure gauge and a temperature sensor. A three-way valve 132 is fixedly installed at the end of the main gas supply pipe 131 via a threaded connection. The valve body is made of cast brass and has an adjustable valve core inside to achieve airflow distribution control. Both the first gas supply branch pipe 133 and the second gas supply branch pipe 134 are made of pressure-resistant rubber tubing. One end of the first gas supply branch pipe 133 is connected to the first outlet of the three-way valve 132 via a clamp, and the other end is connected to the gas source input pipe 340 via a quick connector. One end of the second gas supply branch pipe 134 is connected to the second outlet of the three-way valve 132 via a clamp, and the other end is connected to the tangential secondary air duct 333 via a quick connector. In the above structure, all pipe connections are sealed with sealing rings or sealant to ensure airtightness.

[0103] During use, the air compressor 110 starts to generate compressed air, which is then transported to the gas heating dryer 120 for heating and dehumidification through the main air supply pipe 131. The treated dry hot air continues to reach the three-way valve 132 through the main air supply pipe 131. By adjusting the valve core position of the three-way valve 132, the airflow distribution ratio can be controlled, so that the airflow is transported to the air source input pipe 340 through the first air supply branch pipe 133 and to the tangential secondary air duct 333 through the second air supply branch pipe 134.

[0104] In this embodiment, the compressed air is heated and dehumidified by a gas heating dryer 120, which effectively prevents droplet condensation caused by air humidity during atomization and ensures the stability of the atomization effect. The three-way air valve 132 enables precise distribution and control of the airflow, and the ratio of the main atomizing airflow and the auxiliary airflow can be adjusted according to actual needs, optimizing the pneumatic sieving effect and atomization efficiency. This integrated air supply system provides a stable and reliable air source for the multi-stage atomization component 300, ensuring the continuity and consistency of the entire atomization process.

[0105] Reference Figure 1 In some embodiments of the present invention, the liquid supply assembly 200 includes a curing agent storage tank 210, a metering pump 220, and a delivery pipe 230. One end of the delivery pipe 230 is connected to the curing agent storage tank 210, and the other end is connected to the curing agent input pipe 350; the metering pump 220 is connected to the delivery pipe 230.

[0106] Specifically, the curing agent storage tank 210 is made of polyethylene, and its bottom outlet is sealed to one end of the delivery pipe 230 via a flange connection, with a polytetrafluoroethylene (PTFE) gasket at the flange connection. The metering pump 220 is bolted to the equipment bracket and employs a corrosion-resistant plunger pump structure. Its inlet end is connected to the middle section of the delivery pipe 230 via a compression fitting, and its outlet end is connected to the subsequent section of the delivery pipe 230 via a similar compression fitting. The delivery pipe 230 is made of fluoroplastic material, possessing excellent chemical stability, and its end is detachably connected to the curing agent inlet pipe 350 via a quick-connect coupling. In this structure, the path of the delivery pipe 230 avoids sharp bends and angles, ensuring smooth fluid delivery. The drive motor of the metering pump 220 uses frequency conversion control, enabling precise flow rate adjustment.

[0107] During use, liquid soil heavy metal curing agent is first injected into the curing agent storage tank 210; the metering pump 220 is started, and the metering pump 220 draws curing agent from the curing agent storage tank 210 and delivers it to the curing agent input pipe 350 through the delivery pipe 230; the metering pump 220 precisely controls the delivery volume according to the set flow parameters to ensure that it maintains a predetermined ratio with the gas delivered by the gas source component 100; the liquid curing agent finally enters the primary pre-atomization chamber 321 through the curing agent input pipe 350 to participate in the atomization process.

[0108] In this embodiment, the precise metering control of the metering pump 220 ensures that the delivery volume of the liquid curing agent and the gas flow rate remain in a constant ratio, providing the necessary conditions for stable atomization; the fluoroplastic infusion tube 230 ensures compatibility with chemical agents and avoids the risk of pipeline corrosion and pollution; the reasonable pipeline connection method ensures the sealing and reliability of the delivery process and prevents leakage.

[0109] In some other possible embodiments, the invention further includes a carrier 600, with casters at its bottom. The air compressor 110, curing agent storage tank 210, atomizing body 310, and vacuum pump 510 are all positioned on the carrier 600 via limiting grooves or other means, facilitating overall movement. The atomizing injection probe 420 and porous negative pressure ring 530 are mounted on the carrier 600 via hooks or other means. When needed, the atomizing injection probe 420 and porous negative pressure ring 530 are removed and inserted into the soil; when not needed, they are placed back on the carrier 600. This arrangement greatly facilitates the movement of the entire device.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A soil heavy metal solidification agent atomization penetration reaction device, characterized in that, The application relates to a soil heavy metal solidification device. The device comprises the following components: a gas source assembly (100) for delivering compressed gas; a liquid supply assembly (200) for storing and delivering liquid soil heavy metal solidification agent; a multi-stage atomization assembly (300) having an inlet end communicated with the outlet of the gas source assembly (100) and the outlet of the liquid supply assembly (200) for mixing the soil heavy metal solidification agent with the compressed gas and gradually breaking the agent, and finally outputting micron-sized solidification agent aerosol; an injection assembly (400) having an inlet end communicated with the outlet of the multi-stage atomization assembly (300) for delivering the solidification agent aerosol to a target depth of soil; a negative pressure suction assembly (500) arranged at the periphery of the injection assembly (400) for forming a low-pressure area in the soil area around the injection assembly (400); the negative pressure suction assembly (500) comprises: a vacuum pump (510); at least one porous negative pressure ring sleeve (530), when the number of the porous negative pressure ring sleeves (530) is two or more, the porous negative pressure ring sleeves (530) are arranged along the length direction of a hollow pipe (422) and are communicated in sequence through connecting pipes (540); a suction hose (520) having one end communicated with the vacuum pump (510) and the other end communicated with the porous negative pressure ring sleeve (530); the porous negative pressure ring sleeve (530) comprises: a ring sleeve body (531) internally provided with a vacuum cavity (532) and having an inner wall provided with a plurality of vacuum nozzles (533) communicated with the vacuum cavity (532); a limiting piece (536) arranged inside the ring sleeve body (531) and used for connecting with the hollow pipe (422); 2. The soil heavy metal solidification agent atomization penetration reaction device according to claim 1, characterized in that, a plurality of supporting pieces (535) arranged in a circumferential array at the periphery of the limiting piece (536) and fixedly connected with the limiting piece (536) at one end and fixedly connected with the ring sleeve body (531) at the other end. the multi-stage atomization assembly (300) comprises: an atomization body (310); a multi-stage atomization component (320) arranged inside the atomization body (310) and having a first end communicated with the gas source assembly (100) and the liquid supply assembly (200); 3. The soil heavy metal solidification agent atomization penetration reaction device according to claim 2, characterized in that, a pneumatic screening backflow component (330) arranged inside the atomization body (310) and having a first end communicated with a second end of the multi-stage atomization component (320) and a second end communicated with the injection assembly (400). the multi-stage atomization component (320) comprises a first-stage pre-atomization cavity (321), a second-stage rotational flow acceleration cavity (322) and a third-stage ultrasonic resonance cavity (324) communicated in sequence; the first-stage pre-atomization cavity (321) is communicated with the gas source assembly (100) and the liquid supply assembly (200) at an end away from the second-stage rotational flow acceleration cavity (322). The tertiary ultrasonic resonance cavity (324) is in communication with the pneumatic screening backflow component (330) at one end away from the secondary rotational flow acceleration cavity (322); The inner wall of the secondary rotational flow acceleration cavity (322) is provided with a spiral flow guide groove (323); The tertiary ultrasonic resonance cavity (324) is internally provided with a resonance ring (325).

4. The soil heavy metal solidification agent atomization penetration reaction device according to claim 3, characterized in that, The multi-stage atomization assembly (300) further comprises: An air source input pipe (340) is embedded into the interior of the atomization body (310) at one end and is in communication with the primary pre-atomization cavity (321), and is located outside the atomization body (310) at the other end and is in communication with the air source assembly (100); A curing agent input pipe (350) is arranged in space with the air source input pipe (340), is embedded into the interior of the atomization body (310) at one end and is in communication with the primary pre-atomization cavity (321), and is located outside the atomization body (310) at the other end and is in communication with the liquid supply assembly (200); The air source input pipe (340) and the curing agent input pipe (350) are arranged at an angle at the one end inside the atomization body (310).

5. The soil heavy metal solidification agent atomization penetration reaction device according to claim 4, characterized in that, The pneumatic screening backflow component (330) comprises: A pneumatic screening cavity (331) is arranged in the interior of the atomization body (310), is in communication with the injection assembly (400) at one end, and is in communication with the tertiary ultrasonic resonance cavity (324) at the other end through a communication pipeline (334); A backflow pipeline (332) is arranged in the interior of the atomization body (310), is in communication with the primary pre-atomization cavity (321) at one end, and is in communication with the pneumatic screening cavity (331) at the other end; A tangential secondary air duct (333) is arranged in the interior of the atomization body (310), is in communication with the pneumatic screening cavity (331) at one end and is inclined at a predetermined angle upward; and is in communication with the air source assembly (100) at the other end.

6. The soil heavy metal solidification agent atomization penetration reaction device according to claim 5, characterized in that, The injection assembly (400) comprises an atomization injection probe (420), the atomization injection probe (420) is in communication with the outlet of the pneumatic screening cavity (331) through an atomization injection hose (410), the outlet of the pneumatic screening cavity (331) is located on the center line of the pneumatic screening cavity (331); and the atomization injection probe (420) comprises: A hollow pipe (422) is internally provided with a cavity, the atomization injection hose (410) is in communication with the top end of the cavity, the bottom end of the hollow pipe (422) is provided with a soil breaking cone head (424), and the side wall of the hollow pipe (422) is provided with a plurality of atomization nozzles (423); A pressure applying member (421) is arranged at the top end of the hollow pipe (422).

7. The soil heavy metal solidification agent atomization penetration reaction device according to claim 5, characterized in that, The air source assembly (100) comprises: An air compressor (110); An air flow pipeline group (130) comprises: An air supply main pipeline (131) is in communication with the air compressor (110) at one end; A three-way air valve (132) is arranged in communication at the other end of the air supply main pipeline (131); A first air supply branch pipeline (133) is in communication with the first outlet of the three-way air valve (132) at one end and is in communication with the air source input pipe (340) at the other end; A second gas supply branch pipe (134) is in communication with the second outlet of the three-way gas valve (132) at one end and in communication with the tangential secondary air duct (333) at the other end; A gas heating dryer (120) is in communication with the gas supply main pipe (131).

8. The soil heavy metal solidification agent atomization penetration reaction device according to claim 4, characterized in that, The liquid supply assembly (200) comprises: A curing agent storage tank (210); A liquid supply pipe (230) is in communication with the curing agent storage tank (210) at one end and in communication with the curing agent input pipe (350) at the other end; A metering pump (220) is in communication with the liquid supply pipe (230).

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