Pharmaceutical preparation device and method for heavy metal contaminated soil

Abstract

The present application relates to the technical field of contaminated soil remediation, and particularly relates to a medicament preparation device for heavy metal contaminated soil, which comprises a tank with an open top and a tank cover for covering the opening of the tank, a rotating component is arranged in the tank, and a stirring part for stirring water flow is arranged at the bottom of the rotating component; the top of the rotating component is rotationally connected with the tank cover with the axis of the tank cover as the center, a containing cavity for containing medicament particles is arranged at the top of the rotating component, the top of the containing cavity is in communication with the outside of the tank cover, and a throwing hole for throwing out medicament particles is arranged at the bottom of the side wall of the containing cavity; when the rotating component rotates, the stirring part pushes the water body to rotate to form water flow, and the medicament particles in the containing cavity are thrown out from the throwing hole and fall into the water flow under the action of centrifugal force. The medicament preparation device solves the problem that in the prior art, one hand continuously adds a small amount of solidifying agent / stabilizer, and the other hand stirs, which is easy to cause fatigue of the operator and difficult to adapt to the speed of water flow.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, specifically to a reagent preparation device and method for heavy metal contaminated soil. Background Technology

[0002] Solidification / stabilization is a commonly used technique for remediating heavy metal-contaminated soil. It involves adding solidifying / stabilizing agents to the contaminated soil, transforming heavy metal pollutants into chemically inert forms or encapsulating them in structurally intact, low-permeability solid materials. This reduces the solubility, migration, leaching toxicity, and bioavailability of heavy metals in the environment. Depending on the type of heavy metal and its chemical behavior (chemical properties, chemical form), the selection of remediation agents must follow differentiated compatibility principles: for example, aluminosilicate solidifying agents are typically used for easily chelated heavy metals such as Pb and Cd; mercapto-based heavy metal fixatives are needed for highly reactive heavy metals such as Zn and Cu; and ferrous stabilizers are used for anionic heavy metals such as As that readily undergo redox reactions. The agent is usually added at 0.5%-10% of the dry weight of the soil, with 5%-10% for severely contaminated areas and 0.5%-3% for lightly contaminated areas. It should be mixed with deionized water at a liquid-to-solid ratio of 1:2-1:5 to prepare a homogeneous solution before use.

[0003] In existing technologies, the aforementioned curing agents / stabilizers typically exist in solid granular form. During the preparation of the pharmaceutical solution, operators usually add a large amount of curing agent / stabilizer into the preparation tank at once, and then add deionized water to the tank before or afterward to dissolve and mix the curing agent / stabilizer. Because solid pharmaceutical particles have poor wettability in water, adding a large amount at once can easily cause the surface of the pharmaceutical particles to quickly absorb water to form an outer shell, while the inside remains in a dry powder state, thus resulting in clumping.

[0004] Although operators have the technical means to use stirring rods, stirring blades, and other stirring tools to rotate and agitate the agent to promote the dissolution of the curing agent / stabilizer, the formed clumps are often large in size and have a certain structural strength. The low water flow velocity makes it difficult to effectively break them up by impact, and the stirring tools are also difficult to make sufficient contact and collision with the clumps of agent. It is necessary to carry out stirring operations for a long time or let it stand for a while to allow the agent clumps to dissolve fully and form a relatively uniform agent solution, which has certain limitations. If the stirring tools are moved quickly to increase the water flow velocity, a large amount of air is easily entrained into the agent solution, which also increases the risk of the agent solution splashing out of the tank.

[0005] To overcome the drawbacks of adding large amounts of material at once, operators can also use a method of continuously adding small amounts of curing agent / stabilizer with one hand while stirring with the other hand. However, this method relies entirely on manual operation, which can easily lead to operator fatigue over long periods of time. It is also difficult to match the water flow rate. For example, the amount of curing agent added should be increased when the water flow is fast and reduced when the water flow is slow. Manual operation is difficult and there is still a risk of adding too much at a certain moment, which may cause clumping. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a reagent preparation device and method for heavy metal contaminated soil, so as to solve the problems of the prior art, which uses one hand to continuously add small amounts of solidifying agent / stabilizer while the other hand performs stirring, which easily leads to operator fatigue and is difficult to adapt to the water flow rate.

[0007] This invention is achieved through the following technical solution: A reagent preparation device for heavy metal contaminated soil includes a tank with an opening at the top and a tank cover for covering the opening of the tank. A rotating component is provided inside the tank, and a stirring part for stirring water flow is provided at the bottom of the rotating component. The top of the rotating component is rotatably connected to the can lid about the axis of the can lid. The top of the rotating component is provided with a receiving cavity for holding medicine particles. The top of the receiving cavity is connected to the outside of the can lid. The bottom of the side wall of the receiving cavity is provided with a spraying hole for the medicine particles to be removed. When the rotating component rotates, the stirring part pushes the water to rotate and form a water flow, causing the medicine particles in the containing cavity to be thrown out from the dispensing hole and fall into the water flow under the action of centrifugal force.

[0008] Furthermore, the rotating component includes a medicine cylinder with an open top and a rotating shaft with one end coaxially fixedly connected to the bottom end of the medicine cylinder. The top end of the medicine cylinder passes through the can lid and rotates coaxially with the can lid. The spraying hole is located at the bottom of the side wall of the medicine cylinder and is an elongated strip extending axially towards the medicine cylinder. The medicine cylinder is fitted with a sleeve to cover the spraying hole, and the sleeve is slidably fitted with the medicine cylinder on the same axis.

[0009] Furthermore, the stirring part includes a stirring rod disposed in the middle of the rotating shaft, one end of the stirring rod being inserted into the outer circular surface of the rotating shaft and rotatably engaged, and the other end extending radially toward the rotating shaft; A water baffle is fixedly connected to the lower side of the outer circular surface of the stirring rod. The axis of the stirring rod is located in the plane of the water baffle. A linkage component is provided between the stirring rod and the sleeve. The water baffle drives the stirring rod to rotate under the action of water resistance. The linkage component drives the sleeve to slide upward, increasing the open length of the spray hole.

[0010] Furthermore, the linkage assembly includes a retaining ring and a retaining rod coaxial with the sleeve. The retaining ring is disposed below the sleeve and is fixedly connected to the bottom of the sleeve via a support rod. The abutment rod is located on the back side of the water baffle. One end of the abutment rod is fixedly connected to the stirring rod, and the other end extends radially toward the stirring rod. The abutment rod is perpendicular to the water baffle. Under the action of water resistance, the water baffle drives the stirring rod and the abutment rod to rotate, so that the end of the abutment rod facing away from the stirring rod abuts against the bottom surface of the abutment ring.

[0011] Furthermore, a radially extending convex ring is provided in the middle of the rotating shaft, one end of the stirring rod is inserted into the convex ring, and the outer circular surface of the stirring rod is in contact with the inner circular surface of the convex ring; The outer circular surface of the stirring rod has an annular groove in the middle of a section inside the convex ring. A pin is provided on the side of the outer circular surface of the convex ring facing the medicine cylinder. One end of the pin passes through the side wall of the convex ring and is inserted into the annular groove, and is engaged with the convex ring.

[0012] Furthermore, multiple stirring rods are provided, and the multiple stirring rods are evenly arranged circumferentially along the axis of rotation.

[0013] Furthermore, the inner wall of the bottom end of the pharmaceutical container is a cone shape with the center convex upwards.

[0014] Furthermore, the stirring section also includes stirring blades fixedly connected to the outer circular surface of the bottom end of the rotating shaft, and the bottom edge of the water-facing surface of the stirring blades is in contact with the bottom wall of the tank.

[0015] A method for preparing a reagent for heavy metal contaminated soil, comprising using the aforementioned reagent preparation apparatus for heavy metal contaminated soil, and including the following steps: S1. Inject deionized water into the tank, close and fix the tank lid at the top opening of the tank, and then load the solid medicine granules into the receiving cavity at the top of the rotating part. S2. Drive the rotating part to rotate, so that the rotating part rotates around the axis of the tank cover, and use the stirring part at the bottom of the rotating part to drive the water in the tank to rotate and form a circumferential water flow; S3. The receiving cavity rotates synchronously with the rotating component, causing the drug particles in the receiving cavity to be thrown out in a divergent manner from the dispensing hole under the action of centrifugal force. S4. The pesticide particles thrown out from the spray hole fall into the bottom of the tank under the action of gravity and mix with the water flow driven by the stirring part. Under the impact and stirring action of the water flow, they disperse and dissolve in the deionized water. S5. Continue rotating the rotating component until all the drug particles in the receiving cavity are ejected and dissolved in deionized water to form a uniform drug solution.

[0016] Furthermore, in step S3, the ejection speed of the drug particles ejected from the ejection hole under the action of centrifugal force is positively correlated with the rotation speed of the rotating component, and the amount of drug particles ejected per unit time increases with the increase of rotation speed. In step S4, the water flow velocity is positively correlated with the rotational speed of the rotating component, and the opening degree of the spraying hole increases with the increase of the water flow velocity, thereby forming a dynamic match between the feed amount and the water flow velocity.

[0017] The beneficial effects of this invention are as follows: This invention relates to a reagent preparation device and method for heavy metal contaminated soil. By changing the method of adding reagent particles from the traditional one-time large-scale addition or continuous small-scale addition by manual means, it transforms the addition of reagent particles into automatic throwing and adding by centrifugal force driven by a rotating component. Under the action of centrifugal force, the reagent particles fly out from the throwing hole in a divergent manner, rather than falling into the water in clusters. The particles achieve preliminary spatial dispersion during the throwing process, effectively reducing the risk of agglomeration caused by a large number of particles contacting the water surface in the same area at the same time.

[0018] Meanwhile, the discharge rate of the spray hole is directly related to the rotation speed of the rotating parts. The higher the rotation speed, the greater the centrifugal force and the more drug particles are thrown out per unit time. The speed at which the stirring part pushes the water also increases synchronously with the rotation speed. The increased water flow speed will enhance the impact and shearing effect on the drug particles falling into the water, causing the drug particles to be dispersed and dissolved more quickly. This allows the feeding rate and stirring and dispersing ability to form a synergistic match under the control of the same driving source.

[0019] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0020] Figure 1 This is an exploded view of an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of an embodiment of the present invention; Figure 3 This is a schematic diagram of the planar structure of an embodiment of the present invention; Figure 4 for Figure 3 Sectional view of AA; Figure 5 This is a three-dimensional structural diagram of the rotating component in an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the rotating component removing the sleeve in an embodiment of the present invention; Figure 7 This is a three-dimensional structural diagram of the sleeve in an embodiment of the present invention; Figure 8 This is a three-dimensional structural diagram of the stirring rod in an embodiment of the present invention.

[0021] In the diagram: 1. Tank body; 2. Tank lid; 31. Chemical cartridge; 311. Spraying hole; 32. Rotating shaft; 321. Convex ring; 33. Pin; 34. Stirring blade; 4. Sleeve; 41. Support ring; 42. Support rod; 51. Stirring rod; 511. Annular groove; 52. Water baffle; 53. Support rod. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for 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 present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0027] Please see Figure 1-8The present invention provides a technical solution: a reagent preparation device for heavy metal contaminated soil, comprising a tank 1 with an open top and a tank cover 2 for covering the opening of the tank 1, wherein a rotating component is provided inside the tank 1, and a stirring part for stirring water flow is provided at the bottom of the rotating component. The top of the rotating component is rotatably connected to the can lid 2 about the axis of the can lid 2. The top of the rotating component is provided with a receiving cavity for holding medicine particles. The top of the receiving cavity is connected to the outside of the can lid 2. The bottom of the side wall of the receiving cavity is provided with a spraying hole 311 for the medicine particles to be removed. When the rotating component rotates, the stirring part pushes the water to rotate and form a water flow, causing the medicine particles in the containing cavity to be thrown out from the spraying hole 311 and fall into the water flow under the action of centrifugal force.

[0028] In this solution, the method of adding the agent particles is changed from the traditional one-time large-scale addition or continuous small-scale addition by manual means to automatic throwing and addition by centrifugal force driven by the rotation of the rotating parts. Under the action of centrifugal force, the agent particles fly out from the throwing hole 311 in a divergent manner, instead of falling into the water in clusters. The particles achieve preliminary spatial dispersion during the throwing process, which effectively reduces the risk of agglomeration caused by a large number of particles contacting the water surface in the same area at the same time.

[0029] Meanwhile, the discharge rate of the throwing hole 311 is directly related to the rotation speed of the rotating part. The higher the rotation speed, the greater the centrifugal force and the more drug particles are thrown out per unit time. The speed of the water body pushed by the stirring part also increases synchronously with the rotation speed. The increased water flow speed will enhance the impact and shearing effect on the drug particles falling into the water, causing the drug particles to be dispersed and dissolved more quickly. This makes the feeding rate and stirring and dispersing ability form a synergistic match under the control of the same driving source.

[0030] The tank body 1 is cylindrical in shape, and the tank cover 2 is detachably fixed to the open end of the tank body 1 via a fixed connection (such as threaded connection, bolt locking, snap-fit ​​connection, etc.). This allows the tank cover 2 to be removed from the tank body 1 for adding deionized water into the tank body 1 or for cleaning and inspecting rotating parts. A water inlet connector can also be installed at the top of the side wall of the tank body 1, and a water outlet connector can be installed at the bottom of the side wall, allowing deionized water to be added into the tank body 1 or the prepared chemical solution to be discharged without removing the tank cover 2.

[0031] The liquid level inside tank 1 must be lower than the height of reagent cartridge 31 (e.g., the height difference is greater than 10cm) to reduce the probability of reagent cartridge 31 being wetted by deionized water or deionized water entering reagent cartridge 31. The container cavity is only used to hold the weighed reagent particles (e.g., corresponding to the weight of deionized water in tank 1 to form a certain ratio). It does not have the ability to store reagent particles for a long time and is only suitable for the reagent solution preparation stage.

[0032] In this embodiment: the rotating component includes a medicine cylinder 31 with an open top and a rotating shaft 32 with one end coaxially fixedly connected to the bottom end of the medicine cylinder 31. The top end of the medicine cylinder 31 passes through the can lid 2 and rotates coaxially with the can lid 2. The spraying hole 311 is located at the bottom of the side wall of the medicine cylinder 31 and is an elongated strip extending axially towards the medicine cylinder 31. The medicine cylinder 31 is fitted with a sleeve 4 for covering the spraying hole 311, and the sleeve 4 is coaxially and slidably engaged with the medicine cylinder 31.

[0033] In this design, the top of the reagent cylinder 31 penetrates the canister cover 2, allowing operators to load reagent granules into the reagent cylinder 31 from outside the canister 1 without opening the canister cover 2, making the feeding operation convenient.

[0034] Meanwhile, the bottom end of the rotating shaft 32 is inserted into the inner bottom wall of the tank 1 and rotates in conjunction with it. The coaxial rotation of the agent cylinder 31 and the tank cover 2 provides lateral support to both ends of the rotating component, making the rotation process of the rotating component more stable. The elongated spraying hole 311 extends axially along the agent cylinder 31, allowing the agent particles to be simultaneously thrown outward from different heights along the length of the hole under centrifugal force, increasing the spatial distribution range of the spray and further promoting the dispersion effect of the particles before they enter the water.

[0035] The sleeve 4 and the agent cylinder 31 are coaxially slidingly fitted (single-degree-of-freedom sliding fit, such as opening an axial groove on the outer circular surface of the agent cylinder 31, and fixing a slider embedded in the groove on the inner wall of the sleeve 4 so that the sleeve 4 can only slide axially), providing an adjustable mechanism for the opening degree of the spraying hole 311 (such as interfering fit between the sleeve 4 and the agent cylinder 31, or using bolts for locking).

[0036] When the sleeve 4 completely covers the spray hole 311, the particles in the agent cylinder 31 cannot be thrown out, and the device is in the closed state, which facilitates feeding and cleaning operations. When the sleeve 4 slides to different positions relative to the agent cylinder 31, different lengths of the spray hole 311 are exposed, thereby realizing flexible adjustment of the discharge port size and discharge rate.

[0037] The reagent cylinder 31 may have an external gear ring installed on the outer circumference of the top section outside the lid 2, and a motor is fixedly installed on the top surface of the lid 2. The motor output gear meshes with the external gear ring to automatically drive the device to perform stirring and spraying operations. Alternatively, a handle may be installed on the end face of the top of the reagent cylinder 31 for manual operation by holding the handle.

[0038] In this embodiment: the stirring part includes a stirring rod 51 disposed in the middle of the rotating shaft 32. One end of the stirring rod 51 is inserted into the outer circular surface of the rotating shaft 32 and rotates in cooperation with it, while the other end extends radially toward the rotating shaft 32. A water baffle 52 is fixedly connected to the lower side of the outer circular surface of the stirring rod 51. The axis of the stirring rod 51 is located in the plane of the water baffle 52. A linkage assembly is provided between the stirring rod 51 and the sleeve 4. The water baffle 52 drives the stirring rod 51 to rotate under the action of water resistance. The linkage assembly drives the sleeve 4 to slide upward, increasing the open length of the spray hole 311.

[0039] In this design, the stirring rod 51 not only functions to stir the water, but also achieves autonomous adjustment of the opening degree of the spray hole 311 through the linkage assembly with the sleeve 4. When the rotating component starts to rotate, the stirring rod 51 revolves synchronously with the rotating shaft 32. During the movement, the baffle plate 52 is subjected to the resistance of the water and generates a deflection torque relative to the axis of the stirring rod 51, causing the stirring rod 51 to rotate around its own axis. This rotation is transmitted to the sleeve 4 through the linkage assembly, driving the sleeve 4 to slide upward relative to the agent cylinder 31, thereby changing the opening length of the spray hole 311 with the rotation angle of the stirring rod 51.

[0040] Since the rotation angle of the stirring rod 51 depends on the water resistance of the baffle plate 52, and the water resistance is directly related to the rotation speed of the rotating shaft 32, i.e. the water flow speed (the higher the rotation speed and the faster the water flow speed, the greater the water impact force on the baffle plate 52, the larger the rotation angle of the stirring rod 51, the greater the sliding displacement of the sleeve 4, the greater the open length of the spray hole 311, and the higher the discharge rate), the automatic dynamic matching between the feeding amount and the water flow speed is achieved (it is not mandatory that the two must grow in a completely proportional function relationship).

[0041] In this embodiment: the linkage component includes a retaining ring 41 and a retaining rod 53 coaxial with the sleeve 4. The retaining ring 41 is disposed below the sleeve 4 and is fixedly connected to the bottom of the sleeve 4 through the support rod 42. The abutment rod 53 is disposed on the back side of the water baffle 52. One end of the abutment rod 53 is fixedly connected to the stirring rod 51, and the other end extends radially toward the stirring rod 51. The abutment rod 53 is perpendicular to the water baffle 52. Under the action of water resistance, the water baffle 52 drives the stirring rod 51 and the abutment rod 53 to rotate, so that the end of the abutment rod 53 facing away from the stirring rod 51 abuts against the bottom surface of the abutment ring 41.

[0042] In this scheme, after the water baffle 52 is resisted by the water, it drives the stirring rod 51 to rotate around its own axis. The abutment rod 53, which is fixedly connected to the stirring rod 51, rotates synchronously, so that the free end of the abutment rod 53 gradually rotates upward and finally abuts against the bottom surface of the abutment ring 41. As the stirring rod 51 continues to rotate, the abutment rod 53 applies an upward pushing force to the abutment ring 41, which is transmitted to the sleeve 4 through the support rod 42, causing it to slide upward.

[0043] The support rod 42 should be positioned offset from the spray hole 311 to prevent the support rod 42 from moving upward to the height of the spray hole 311 and obstructing the spray hole 311.

[0044] Alternatively, the abutment rod 53 can be configured with its two ends located on both sides of the water baffle plate along the circumference of the rotating shaft 32, so that the water-facing and back-facing surfaces of the water baffle plate 52 can be freely switched. That is, no matter which direction the rotating shaft 32 rotates, one end of the abutment rod 53 can always form an abutment state with the abutment ring 41.

[0045] In this embodiment: a radially extending convex ring 321 is provided in the middle of the rotating shaft 32, one end of the stirring rod 51 is inserted into the convex ring 321, and the outer circular surface of the stirring rod 51 is in contact with the inner circular surface of the convex ring 321; The outer circular surface of the stirring rod 51 has an annular groove 511 in the middle of a section inside the convex ring 321. A pin 33 is provided on the side of the outer circular surface of the convex ring 321 facing the medicine cylinder 31. One end of the pin 33 passes through the side wall of the convex ring 321 and is inserted into the annular groove 511 and is connected to the convex ring 321.

[0046] In this design, the convex ring 321 provides a stable mounting base for the stirring rod 51. The stirring rod 51 is inserted into the convex ring 321, and the circular surfaces of the two fit together, ensuring that the stirring rod 51 can rotate smoothly relative to the convex ring 321 without radial movement. The pin 33 is embedded in the annular groove 511, which limits the axial position of the stirring rod 51 and prevents the stirring rod 51 from coming off the convex ring 321 along its own axis due to centrifugal force or water flow impact during rotation. The annular groove 511 is a continuous annular structure. After the pin 33 is inserted into it, it does not hinder the free rotation of the stirring rod 51 around its own axis. That is, the stirring rod 51 can still rotate flexibly when subjected to the water resistance transmitted by the baffle plate 52. The axial limitation and circumferential rotation do not interfere with each other.

[0047] Meanwhile, the pin 33 is located on the outer surface of the convex ring 321 facing the medicine cylinder 31. The insertion direction of the pin 33 on the convex ring 321 is the direction of gravity, so as to reduce the risk of the pin 33 slipping out and falling off.

[0048] In this embodiment: multiple stirring rods 51 are provided, and the multiple stirring rods 51 are evenly arranged around the circumference of the rotating shaft 32.

[0049] In this design, the uniform arrangement of multiple stirring rods 51 around the rotating shaft 32 ensures that when the rotating component rotates, the driving force generated by each stirring rod 51 on the water is evenly distributed in the circumferential direction, reducing the probability of water flow pulsation and unevenness that may be caused by a single stirring rod 51, and making the circumferential water flow in the tank 1 more stable and continuous.

[0050] Meanwhile, each stirring rod 51 is equipped with a water-blocking plate 52 and a supporting rod 53. Multiple water-blocking plates 52 simultaneously sense water resistance and drive their respective stirring rods 51 to rotate, allowing multiple supporting rods 53 to simultaneously apply an upward pushing force to the sleeve 4, forming multiple support points and making the upward sliding action of the sleeve 4 more evenly stressed. Even if one or more stirring rods 51 become stuck or damaged, the supporting rods 53 on the remaining stirring rods 51 can still normally support and push the supporting ring 41.

[0051] In this embodiment, the inner wall of the bottom end of the medicine cylinder 31 is a cone shape with the center convex upward.

[0052] In this design, the pesticide particles automatically slide towards the periphery of the conical inclined surface under their own gravity, concentrating near the dispensing holes 311 at the bottom of the side wall of the pesticide cylinder 31. This allows centrifugal force to directly eject the particles from the dispensing holes 311, reducing the risk of residue and blockage caused by particles accumulating in the central area at the bottom of the cylinder and moving away from the dispensing holes 311.

[0053] Meanwhile, the conical bottom with a high center and low edges allows the centrifugal force to act on the particles in a direction that matches the direction of the conical inclined surface during rotation. The particles have two directions of movement along the inclined surface: outward and upward, which enables them to reach the spray hole 311 more smoothly.

[0054] In this embodiment, the stirring part further includes stirring blades 34 that are fixedly connected to the outer circular surface of the bottom end of the rotating shaft 32, and the bottom edge of the water-facing surface of the stirring blades 34 is in contact with the inner bottom wall of the tank 1.

[0055] In this design, the stirring blades 34 and the stirring rod 51 form a layered composite stirring structure. The stirring rod 51 stirs the water in the middle region of the tank 1, while the stirring blades 34 act on the bottom region of the tank 1. Together, they achieve deep stirring of the water in the tank 1 from the bottom to the middle. The bottom edge of the water-facing surface of the stirring blades 34 is in contact with the bottom wall of the tank 1, enabling the stirring blades 34 to scrape and push the undissolved drug particles that have settled to the bottom of the tank, raising the bottom particles again and guiding them to the main flow area for mixing, thus preventing the drug particles from settling and accumulating at the bottom of the tank 1.

[0056] A method for preparing a reagent for heavy metal contaminated soil, comprising using the aforementioned reagent preparation apparatus for heavy metal contaminated soil, and including the following steps: S1. Inject deionized water into the tank 1, cover and fix the tank lid 2 at the top opening of the tank 1, and then load the solid medicine granules into the receiving cavity at the top of the rotating part. S2. Drive the rotating component to rotate, so that the rotating component rotates around the axis of the tank cover 2, and use the stirring part at the bottom of the rotating component to push the water in the tank 1 to rotate and form a circumferential water flow; S3. The receiving cavity rotates synchronously with the rotating component, causing the drug particles in the receiving cavity to be thrown out in a divergent manner from the dispensing hole 311 under the action of centrifugal force. S4. The agent particles thrown out from the spray hole 311 fall into the bottom of the tank 1 under the action of gravity and are mixed into the water flow driven by the stirring part. Under the impact and stirring action of the water flow, they are dispersed and dissolved in the deionized water. S5. Continue rotating the rotating component until all the drug particles in the receiving cavity are ejected and dissolved in deionized water to form a uniform drug solution.

[0057] In this solution, the entire preparation process is fully automated and integrated. Operators only need to complete four initial steps: filling with water, covering the lid, adding materials, and starting the rotation. Subsequent feeding, dispersion, stirring, and dissolving processes are all completed autonomously by the device without continuous manual intervention. This frees up the operator's hands and eliminates the labor fatigue and distraction caused by manually adding small amounts of chemicals for a long time.

[0058] This method fully leverages the synergistic effect of centrifugal dispersion and water flow agitation. The reagent particles acquire initial velocity upon being ejected, entering the water in a dispersed rather than agglomerated state. Upon entry, they are subjected to intense impact and shearing from the circumferential water flow accelerated by the agitator. The particle surface is continuously washed and renewed by the water flow; after the outer layer dissolves, the inner layer is immediately exposed to fresh water, overcoming the clumping phenomenon caused by large-scale single-use feeding. Throughout the process, the feeding rate is determined by centrifugal force, and the agitation intensity is determined by the rotational speed; both share a single drive source.

[0059] In this embodiment: In step S3, the ejection speed of the drug particles ejected from the ejection hole 311 under the action of centrifugal force is positively correlated with the rotation speed of the rotating component, and the amount of drug particles ejected per unit time increases with the increase of rotation speed. In step S4, the water flow velocity is positively correlated with the rotational speed of the rotating component, and the opening degree of the spraying hole 311 increases with the increase of the water flow velocity, thereby forming a dynamic match between the feeding amount and the water flow velocity.

[0060] In this scheme, an automatic real-time matching relationship is established between the amount of material fed and the stirring and dispersing capacity during the preparation process. When the rotation speed of the rotating parts is low, the centrifugal force is small, the speed at which the drug particles are thrown out of the spray hole 311 is slow, and the amount of material fed per unit time is small. At the same time, the speed at which the stirring part pushes the water is also low, and the water flow impact force is weak. At this time, the opening degree of the spray hole 311 is small, and the discharge channel is narrow, which is just adapted to the lower dispersion capacity. This allows a small amount of drug particles to be fully dispersed and dissolved by the weak water flow, making the probability of exceeding the dispersion carrying capacity of the water flow due to excessive feeding low.

[0061] As the rotational speed gradually increases, the centrifugal force increases, accelerating the feeding rate. Simultaneously, the increased water flow velocity enhances the dispersion capability, and the opening degree of the spray orifice 311 increases to match the faster discharge demand. The increase in feeding volume and the enhancement of dispersion capability occur simultaneously. This dynamic matching mechanism ensures that the feeding rate is not too low, thus preventing waste of the water flow's dispersion potential, regardless of changes in rotational speed. The entire adaptive process is automatically achieved based on physical principles such as centrifugal force, water flow resistance, and mechanical linkage, without the need for any additional electronic sensors, controllers, or actuators. The equipment is simple, reliable, low-cost, and has a fast response speed, representing a leapfrog improvement from manual experience-based operation to automated preparation.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A reagent preparation apparatus for heavy metal contaminated soil, comprising a tank (1) with an open top and a lid (2) for covering the opening of the tank (1), characterized in that: The tank (1) is equipped with a rotating component, and the bottom of the rotating component is equipped with a stirring part for stirring the water flow; The top of the rotating component is rotatably connected to the can lid (2) with the axis of the can lid (2) as the center. The top of the rotating component is provided with a receiving cavity for holding medicine particles. The top of the receiving cavity is connected to the outside of the can lid (2). The bottom of the side wall of the receiving cavity is provided with a sprinkling hole (311) for the medicine particles to be removed. When the rotating component rotates, the stirring part pushes the water to rotate and form a water flow, so that the drug particles in the containing cavity are thrown out from the spray hole (311) and fall into the water flow under the action of centrifugal force.

2. The reagent preparation device for heavy metal contaminated soil according to claim 1, characterized in that: The rotating component includes a medicine cylinder (31) with an open top and a rotating shaft (32) with one end coaxially fixedly connected to the bottom end of the medicine cylinder (31). The top end of the medicine cylinder (31) passes through the can lid (2) and rotates coaxially with the can lid (2). The spraying hole (311) is located at the bottom of the side wall of the medicine cylinder (31) and is a long strip extending axially toward the medicine cylinder (31). The medicine cylinder (31) is covered with a sleeve (4) for covering the spraying hole (311). The sleeve (4) is coaxially slidingly engaged with the medicine cylinder (31).

3. The reagent preparation device for heavy metal contaminated soil according to claim 2, characterized in that: The stirring part includes a stirring rod (51) disposed in the middle of the rotating shaft (32). One end of the stirring rod (51) is inserted into the outer circular surface of the rotating shaft (32) and rotates in fit, while the other end extends radially toward the rotating shaft (32). A water baffle (52) is fixedly connected to the lower side of the outer circular surface of the stirring rod (51). The axis of the stirring rod (51) is located in the plane of the water baffle (52). A linkage assembly is provided between the stirring rod (51) and the sleeve (4). The water baffle (52) drives the stirring rod (51) to rotate under the action of water resistance. The linkage assembly drives the sleeve (4) to slide upward, increasing the open length of the spray hole (311).

4. The reagent preparation device for heavy metal contaminated soil according to claim 3, characterized in that: The linkage component includes a retaining ring (41) and a retaining rod (53) coaxial with the sleeve (4). The retaining ring (41) is located below the sleeve (4) and is fixedly connected to the bottom of the sleeve (4) by a support rod (42). The abutment rod (53) is located on the back side of the water baffle (52). One end of the abutment rod (53) is fixedly connected to the stirring rod (51), and the other end extends radially toward the stirring rod (51). The abutment rod (53) is perpendicular to the water baffle (52). Under the action of water resistance, the water baffle (52) drives the stirring rod (51) and the abutment rod (53) to rotate, so that the end of the abutment rod (53) facing away from the stirring rod (51) abuts against the bottom surface of the abutment ring (41).

5. The reagent preparation device for heavy metal contaminated soil according to claim 3, characterized in that: The rotating shaft (32) is provided with a radially extending convex ring (321) in the middle, and one end of the stirring rod (51) is inserted into the convex ring (321), and the outer circular surface of the stirring rod (51) is in contact with the inner circular surface of the convex ring (321). The stirring rod (51) has an annular groove (511) in the middle of a section inside the convex ring (321) on its outer circular surface. A pin (33) is provided on the side of the outer circular surface of the convex ring (321) facing the medicine cylinder (31). One end of the pin (33) passes through the side wall of the convex ring (321) and is inserted into the annular groove (511), and is connected to the convex ring (321).

6. The reagent preparation device for heavy metal contaminated soil according to claim 3, characterized in that: Multiple stirring rods (51) are provided, and the multiple stirring rods (51) are evenly arranged around the circumference of the rotating shaft (32).

7. The reagent preparation device for heavy metal contaminated soil according to claim 2, characterized in that: The inner wall of the bottom end of the medicine cylinder (31) is a cone shape with the center convex upward.

8. The reagent preparation device for heavy metal contaminated soil according to claim 3, characterized in that: The stirring part also includes stirring blades (34) that are fixedly connected to the outer circular surface of the bottom end of the rotating shaft (32), and the bottom edge of the water-facing surface of the stirring blades (34) is in contact with the inner bottom wall of the tank (1).

9. A method for preparing a reagent for heavy metal contaminated soil, comprising using the reagent preparation apparatus for heavy metal contaminated soil according to any one of claims 1-8, characterized in that: Includes the following steps: S1. Inject deionized water into the tank (1), cover and fix the tank lid (2) at the top opening of the tank (1), and then load the solid medicine granules into the receiving cavity at the top of the rotating part. S2. Drive the rotating component to rotate, so that the rotating component rotates around the axis of the tank cover (2), and use the stirring part at the bottom of the rotating component to push the water in the tank (1) to rotate to form a circumferential water flow; S3. The receiving cavity rotates synchronously with the rotating component, so that the drug particles in the receiving cavity are thrown out in a divergent manner from the throwing hole (311) under the action of centrifugal force. S4. The agent particles thrown out from the spray hole (311) fall into the bottom of the tank (1) under the action of gravity and are mixed into the water flow driven by the stirring part. Under the impact and stirring action of the water flow, they are dispersed and dissolved in the deionized water. S5. Continue rotating the rotating component until all the drug particles in the receiving cavity are ejected and dissolved in deionized water to form a uniform drug solution.

10. The method for preparing a reagent for heavy metal contaminated soil according to claim 9, characterized in that: In step S3, the ejection speed of the drug particles ejected from the ejection hole (311) under the action of centrifugal force is positively correlated with the rotation speed of the rotating component, and the amount of drug particles ejected per unit time increases with the increase of rotation speed. In step S4, the water flow velocity is positively correlated with the rotation speed of the rotating component, and the opening degree of the spraying hole (311) increases with the increase of the water flow velocity, thereby forming a dynamic match between the feed amount and the water flow velocity.

Images