Self-propelled medicament and soil high-precision mixing and stirring equipment structure

Abstract

The invention relates to the technical field of soil remediation, and particularly discloses a self-propelled agent and soil high-precision mixing and stirring equipment structure which comprises a stirring cavity shell. The medicament adding system is connected with the stirring cavity shell; the stirring cavity shell is provided with a knife roll fixing seat which is relatively fixed and a knife roll which is arranged on the knife roll fixing seat; the triangular wedge-shaped bulge is arranged on the inner surface of the stirring cavity shell; and the hob is arranged on the knife roll. By means of the designed triangular wedge-shaped protruding structure, the collision frequency of soil particles and agent particles in the stirring process is increased, distribution of agents in soil is effectively improved, the mixing uniformity and quality are improved, and according to experimental detection and numerical simulation analysis, the mixing quality can reach 90% or above. In addition, soil and agents with different particle sizes can be stirred at the optimal speed through the rotating speed adjusting function of the equipment, energy consumption is reduced, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of soil remediation, and in particular to a self-propelled high-precision mixing and stirring equipment structure for agents and soil. Background Art

[0002] With the acceleration of industrialization, especially the rapid development of mining, metallurgy, chemical industry and other industries, heavy metal and organic pollution has become one of the important problems of global environmental pollution. Soil pollution not only harms soil quality and affects the ecological function of soil, but also may enter the human body through the food chain, posing a serious threat to human health. Heavy metals such as lead, cadmium, mercury, arsenic, chromium and other elements are characterized by persistence, non-degradability, strong toxicity and accumulation; many organic pollutants have three-cause effects. Once these pollutants enter the soil, they are not only difficult to remove, but also spread through groundwater, air and crops over time, which has a profound negative impact on the ecological environment and human life.

[0003] At present, soil remediation technologies mainly include physical remediation, chemical remediation and biological remediation.

[0004] Physical remediation technology usually includes soil excavation, washing, gas phase extraction, solidification, heat treatment and other methods to remove pollutants by physical means. Chemical remediation technology mainly involves adding chemical agents to react with heavy metals and organic pollutants in the soil to produce chemical reactions such as precipitation, complexation, ion exchange, and oxidation-reduction. Through these reactions, heavy metals can form insoluble compounds, thereby fixing heavy metals in the soil and reducing their bioavailability; organic pollutants can be decomposed and converted into low-molecular organic matter or carbon dioxide and water. Bioremediation is to achieve the purpose of repairing contaminated soil by absorbing, degrading or transforming pollutants through organisms such as plants and microorganisms. Among these technologies, solidification and stabilization technology is currently the most widely used remediation technology. Solidification and stabilization technology mixes agents or materials (such as cement, lime, clay minerals, carbon-based materials, iron-based materials, phosphorus-based materials, polymer compounds or other chemicals) with contaminated soil, thereby fixing heavy metal ions in the soil, reducing their bioavailability, and ultimately reducing the migration and diffusion of pollutants. The frequency of application of chemical remediation technology is second only to solidification and stabilization technology, and it is the most widely used technology for organic contaminated soil. Bioremediation technology is also widely used internationally. It is a green, low-carbon and sustainable remediation technology and an important direction for future remediation technology.

[0005] However, one of the most critical issues that determines the remediation effect of these technologies is how to evenly mix the agents or remediation materials with the soil to ensure that the agents or materials are in sufficient contact and reaction with the pollutants in the soil, thereby ensuring the scope of action and remediation effect of the agents or materials.

[0006] At present, the dosing devices used in engineering projects mainly include excavators, screening and crushing buckets, high-pressure rotary spraying machines, spiral mixers, tillers, rotary tillers, soil remediation integrated machines, etc. The mixing accuracy of excavators is the lowest; screening and crushing buckets and tillers can only be used for ex-situ soil mixing, and the mixing accuracy is limited; high-pressure rotary spraying machines and spiral mixers can be used for in-situ mixing, but the mixing accuracy is not high, and it is difficult to meet sufficient chemical or physical reactions; rotary tillers can be used for in-situ mixing of surface soil, but their mixing depth is small and the mixing effect is poor. Traditional soil remediation integrated machines usually use claw machines, crushing knife rollers and other mechanisms to send soil and agent particles into the crushing and mixing area through material belts for mixing to improve the mixing uniformity of the agent and soil. It is currently the ex-situ soil mixing equipment with the best mixing effect. However, the equipment has exposed the following problems in actual use: Uneven mixing. Most traditional soil remediation equipment uses vertical blade-shaped crushing rollers or baffle-shaped rollers for mixing. Although these two roller structures can crush and stir the soil and reagents to a certain extent, during the mixing process, due to the working principle of the equipment and the limitations of the roller shape, the reagent particles and soil particles often cannot fully contact each other, resulting in poor mixing effects. In some cases, the reagent particles will stay on the soil surface and have difficulty penetrating into the deep soil layer, affecting the remediation effect.

[0007] High energy consumption. The mixing system of traditional soil remediation equipment usually requires high power output, especially when using a baffle-shaped knife roller. The collision between the knife roller and the particles generates a large energy consumption, resulting in high operating costs of the equipment. This high energy consumption not only increases operating costs, but may also cause excessive wear of the equipment and shorten its service life.

[0008] The equipment is seriously worn. In traditional equipment, the long-term contact between the knife roller and soil particles will cause the knife roller to wear, especially when using the baffle-shaped knife roller, the larger contact area and impact force will accelerate the damage of the equipment. Frequent maintenance and replacement of parts will increase the cost of equipment use and affect the stability and long-term efficiency of the equipment.

[0009] Long mixing time and low efficiency. Traditional soil remediation equipment often relies on a long period of stirring to achieve a relatively uniform mixing effect, especially when the soil or agent has larger particles, the mixing effect often takes longer to achieve. This not only wastes precious working time, but also reduces the working efficiency of the equipment. Summary of the invention

[0010] The purpose of the present invention is to provide a self-propelled high-precision mixing and stirring equipment structure for chemicals and soil to solve the problems raised in the above-mentioned background technology.

[0011] To achieve the above object, the present invention provides the following technical solutions: A self-propelled high-precision mixing and stirring equipment structure for medicine and soil, the equipment structure comprising: A stirring chamber housing; A reagent adding system connected to the stirring chamber shell; The mixing chamber housing is relatively fixed to a knife roller fixing seat, and a knife roller is mounted on the knife roller fixing seat; A triangular wedge-shaped protrusion mounted on the inner surface of the stirring chamber shell; A rolling cutter is arranged on the cutter roller; wherein the rolling cutter is staggeredly matched with the triangular wedge-shaped protrusion.

[0012] As a further solution of the present invention: the triangular wedge-shaped protrusions are evenly distributed on the inner surface of the stirring chamber, with a height ranging from 1 cm to 5 cm and an angle ranging from 30° to 60°.

[0013] As a further solution of the present invention: a cutter roller main shaft is provided at one end of the hob, the cutter roller main shaft is externally connected to a motor, and the rotation speed range of the motor is 100 rpm to 900 rpm.

[0014] As a further solution of the present invention: the agent adding system includes an agent inlet and at least one sprayer, the sprayer is arranged at the soil feed inlet, and the soil feed inlet is installed on the side of the stirring chamber shell away from the agent inlet.

[0015] As a further solution of the present invention: the sprayer includes a nozzle and a nozzle adjustment assembly, the nozzle adjustment assembly is used to adjust the angle of the nozzle; the flow range of the nozzle is 0.1L / min to 1.0L / min.

[0016] As a further solution of the present invention: the device structure also includes: A power spindle seat is fixed relatively to the mixing chamber shell, and a power spindle is installed on the power spindle seat. The power spindle is externally connected to a moving part, and the types of the moving parts include crawlers and wheeled chassis.

[0017] As a further solution of the present invention: the material types of the inner wall of the stirring chamber shell include high manganese steel and alloy steel.

[0018] As a further solution of the present invention: the device structure also includes an intelligent system, and the intelligent system includes: The sensor monitoring module is used to monitor the mixing uniformity, soil moisture and equipment operation status in real time and transmit the data to the control center; The command receiving module is used to receive the control command sent by the control center and send the control command to the corresponding power source; the power source includes a motor connected to the knife roller main shaft, a nozzle adjustment component of the sprayer, a flow adjustment component of the nozzle, and a moving part external to the power main shaft.

[0019] As a further solution of the present invention: the sensor monitoring module includes a humidity sensor, a rotation speed sensor and a particle flow sensor; and the connection mode with the control center is a wireless connection mode.

[0020] Compared with the prior art, the invention has the following beneficial effects: the invention increases the collision frequency between soil particles and reagent particles during the mixing process by designing a triangular wedge-shaped protrusion structure, effectively improves the distribution of the reagent in the soil, and improves the mixing uniformity and quality. According to experimental detection and numerical simulation analysis, the mixing quality can reach more than 90%. In addition, the speed adjustment function of the equipment enables soil and reagents of different particle sizes to be mixed at the optimal speed, reducing energy consumption and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0022] Figure 1 This is a schematic diagram of the overall structure of the self-propelled high-precision mixing equipment for chemicals and soil.

[0023] Figure 2 This is a schematic diagram of the internal structure of a self-propelled high-precision mixing and stirring equipment for chemicals and soil.

[0024] Figure 3 This is an overall schematic diagram of the soil mixing simulation results.

[0025] In the figure: 1-stirring chamber shell, 2-medicament adding system, 3-medicament inlet, 4-triangular wedge-shaped protrusion, 5-stirring chamber, 6-knife roller, 7-knife roller main shaft, 8-knife support, 9-rolling cutter, 10-power main shaft seat, 11-power main shaft, 12-knife roller fixing seat. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] See also Figure 1 and Figure 2 In an embodiment of the present invention, a self-propelled high-precision mixing and stirring device structure of a medicine and soil is provided, and the device structure comprises: Stirring chamber housing 1; A reagent adding system 2 connected to the stirring chamber housing 1; The stirring chamber housing 1 is relatively fixed to a knife roller fixing seat 12, and a knife roller 6 is installed on the knife roller fixing seat 12; A triangular wedge-shaped protrusion 4 installed on the inner surface of the stirring chamber shell 1; A roller cutter 9 is arranged on the cutter roller 6; wherein the roller cutter 9 is staggeredly matched with the triangular wedge-shaped protrusion 4; wherein the roller cutter 9 is connected to the cutter roller 6 in such a way that a cutter support 8 is arranged on the cutter roller 6 for mounting the roller cutter 9; The triangular wedge-shaped protrusions 4 are evenly distributed on the inner surface of the stirring chamber 5, with a height ranging from 1 cm to 5 cm and an angle ranging from 30° to 60°.

[0028] Furthermore, a cutter roller main shaft 7 is provided at one end of the hob 9, and the cutter roller main shaft 7 is externally connected to a motor, and the rotation speed range of the motor is 100 rpm to 900 rpm.

[0029] Specifically, the agent adding system 2 includes an agent inlet 3 and at least one sprayer. The sprayer is arranged at a soil feed port. The soil feed port is installed on a side of the stirring chamber housing 1 away from the agent inlet 3 .

[0030] In addition, the sprayer includes a nozzle and a nozzle adjustment assembly, and the nozzle adjustment assembly is used to adjust the angle of the nozzle; the flow range of the nozzle is 0.1L / min to 1.0L / min.

[0031] In one example of the technical solution of the present invention, the self-propelled soil mixing and stirring equipment is applied to the remediation of heavy metal contaminated soil in mining areas; the working principle and operation steps of the equipment are as follows: At the beginning of the operation, the soil is sent to the front end of the equipment through the material belt and enters the uppermost area of ​​the mixing chamber 5. It is first pre-mixed by a claw machine to ensure that the soil particles are initially loosened and mixed evenly. The claw machine guides the soil particles to fall smoothly to the crushing knife roller 6 during the mixing process. The pre-mixed soil particles fall to the crushing knife roller 6 by gravity. The knife roller 6 can preliminarily crush and mix the soil and drug particles with low energy consumption.

[0032] During the stirring process, the rotation of the knife roller 6 effectively breaks up large particles in the soil, ensuring that the soil and the drug particles make initial contact and begin to mix. The knife roller 6 adopts a baffle-shaped and vertical-sheet-shaped staggered design, which can increase the contact area between the knife roller 6 and the particles and increase the frequency of particle collision and flipping. At this time, the soil particles and the drug particles are forced to collide, break and rebound along the surface of the knife roller 6 and the triangular wedge-shaped protrusions 4 in the stirring chamber 5, thereby enhancing the interaction between the particles and ensuring a more uniform mixing of the soil and the drug.

[0033] During the stirring process of the knife roller 6, the agent is evenly added to the soil through the sprayer. The agent spraying system can adjust the spraying flow rate according to the particle size, properties and required amount of soil and agent. The angle of the sprayer can also be adjusted to ensure that the agent is evenly distributed in the soil. After the mixing process is completed, the evenly mixed soil-agent mixture settles to the bottom of the equipment by gravity and is discharged from the discharge port. At this time, the soil and agent stirred by the knife roller 6 have been fully mixed, and the effective ingredients of the agent are evenly penetrated into the soil, providing a guarantee for subsequent solidification, stabilization and repair.

[0034] As a preferred embodiment of the technical solution of the present invention, the device structure also includes: A power main shaft seat 10 is relatively fixed to the mixing chamber shell 1, and a power main shaft 11 is installed on the power main shaft seat 10. The power main shaft 11 is externally connected to moving parts, and the types of the moving parts include crawlers and wheeled chassis.

[0035] In one example of the technical solution of the present invention, the equipment has a self-propelled function and can complete soil mixing and reagent stirring operations under different soil conditions in the mining area; the frame of the equipment adopts a crawler or wheeled chassis, has good terrain adaptability, and can move freely under different soil types and environmental conditions; at the same time, the core components of the equipment are made of wear-resistant materials, and the surfaces of the stirring chamber 5 and the knife roller 6 are specially treated, which effectively improves the durability of the equipment under long-term high-intensity work.

[0036] Specifically, the above-mentioned moving parts are also called power systems, which use internal combustion engines or electric drive systems with an output power range of 10~50kW, and are equipped with speed control modules to achieve precise adjustment of the equipment's travel speed.

[0037] As a preferred embodiment of the technical solution of the present invention, the inner wall of the stirring chamber shell 1 is made of wear-resistant material, and the types of wear-resistant materials include high manganese steel and alloy steel.

[0038] As a preferred embodiment of the technical solution of the present invention, the device structure also includes an intelligent system, and the intelligent system includes: The sensor monitoring module is used to monitor the mixing uniformity, soil moisture and equipment operation status in real time and transmit the data to the control center; The command receiving module is used to receive the control command sent by the control center and send the control command to the corresponding power source; the power source includes a motor connected to the knife roller main shaft 7, a nozzle adjustment component of the sprayer, a flow adjustment component of the nozzle, and a moving part external to the power main shaft 11.

[0039] Furthermore, the sensor monitoring module includes a humidity sensor, a rotation speed sensor and a particle flow sensor; and is connected to the control center in a wireless manner.

[0040] In an example of the technical solution of the present invention, the device also includes a sensor monitoring system for real-time monitoring of mixing uniformity, soil moisture and equipment operating status, and transmitting data to a control center to adjust equipment parameters. The monitoring system includes a humidity sensor, a rotation speed sensor and a particle flow sensor, which are connected to the control center through a wireless communication module to achieve remote control and fault diagnosis.

[0041] As a preferred embodiment of the technical solution of the present invention, the working state numerical simulation and result comparison are performed on the soil mixing mixer in the present invention and the mixer without triangular protrusions; in the simulation, the particle sizes of soil and agent particles are set to 2.0 cm and 1.0 cm respectively, and the rotation speeds of the existing equipment and the hob 9 of the present invention are set to 300 rpm respectively, and the mixing uniformity and mixing quality of soil and agent particles are calculated. Considering that the soil and agent in the mixer are fine powder particles, they are densely mixed in the mixing mixer, and there is an overlap between adjacent particles at the contact point, and they are closely connected to each other through contact force. Here, a soft ball model is selected to perform numerical simulation of material mixing. Considering that wet granular materials such as soil and agents in the mixer have certain viscosity characteristics, the Hertz-Mindlin with JKR (Johnson-Kendall-Roberts) Cohesion viscosity contact model is used as the contact model between particles. In order to quantitatively analyze the viscosity force under the contact state, the JKR contact theory is applied in the DEM simulation. Since there are many real soil particles, the particle size is small, and there is a certain proportion of irregular shapes, but the adjacent element contact search of irregular shapes is relatively complicated, which will lead to a huge amount of calculation for numerical simulation and often cannot be carried out. Therefore, without affecting the main results, spherical particles are used for the numerical simulation of powder particles. Figure 3 , and at the same time adjust and enlarge the level of the particles to a certain extent, while fully retaining the discrete characteristics of the particles, the number of particles is kept within the range of discrete element numerical simulation.

[0042] If the mixer is not equipped with a triangular protrusion, the fine reagent particles will always be on the surface of the soil particles due to the strong centrifugal tumbling of the soil particles, making it difficult for them to enter the interior of the soil particles. However, installing a triangular protrusion structure can intensify the collision and mixing of the soil and reagent particles inside the equipment during the rotation process. The problem of black reagent particles depositing on the surface has been greatly improved, and they can penetrate into the soil. The aggregation problem inside the soil has been solved, and the mixing effect has been effectively improved. The specific results are summarized in Table 1.

[0043] Hob speed 9 rpm Buried depth mm Mixing uniformity Mixing quality Mixer with 4 inner chamber structure without triangular wedge protrusion 300 228 0.090 80.2% Structural mixer of the present invention 300 228 0.081 90.4% Table 1 Calculation results of soil-agent (2.0cm / 1.0cm) mixing uniformity.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-propelled high-precision mixing and stirring equipment structure for chemicals and soil, characterized in that: The device structure comprises: A stirring chamber housing (1); A drug adding system (2) connected to the stirring chamber shell (1); The mixing chamber housing (1) is relatively fixed to a knife roller fixing seat (12), and a knife roller fixing seat (12) is mounted on the knife roller fixing seat (12); A triangular wedge-shaped protrusion (4) mounted on the inner surface of the stirring chamber shell (1); A rolling cutter (9) is arranged on a cutter roller fixing seat (12); wherein the rolling cutter (9) is misaligned with the triangular wedge-shaped protrusion (4).

2. The self-propelled high-precision mixing and stirring equipment structure of medicine and soil according to claim 1 is characterized in that: The triangular wedge-shaped protrusions (4) are evenly distributed on the inner surface of the stirring chamber (5), with a height ranging from 1 cm to 5 cm and an angle ranging from 30° to 60°.

3. The self-propelled high-precision mixing and stirring equipment structure of medicine and soil according to claim 1 is characterized in that: A knife roller main shaft (7) is provided at one end of the hob (9); the knife roller main shaft (7) is externally connected to a motor; the motor has a rotation speed ranging from 100 rpm to 900 rpm.

4. The self-propelled high-precision mixing and stirring equipment structure of medicine and soil according to claim 2 is characterized in that: The agent adding system (2) comprises an agent inlet (3) and at least one sprayer, wherein the sprayer is arranged at a soil feed inlet, and the soil feed inlet is installed on a side of the stirring chamber housing (1) away from the agent inlet (3).

5. The self-propelled high-precision mixing and stirring equipment structure of medicine and soil according to claim 4 is characterized in that: The sprayer comprises a nozzle and a nozzle adjustment assembly, wherein the nozzle adjustment assembly is used to adjust the angle of the nozzle; the flow rate range of the nozzle is 0.1 L / min to 1.0 L / min.

6. The self-propelled high-precision mixing and stirring equipment structure of medicine and soil according to claim 1 is characterized in that: The device structure also includes: A power spindle seat (10) is fixed relative to the stirring chamber shell (1), and a power spindle (11) is mounted on the power spindle seat (10). The power spindle (11) is externally connected to a moving part. The types of the moving part include a crawler track and a wheeled chassis.

7. The self-propelled high-precision mixing and stirring equipment structure of medicine and soil according to any one of claims 1 to 6, characterized in that: The material types of the inner wall of the stirring chamber shell (1) include high manganese steel and alloy steel.

8. The self-propelled high-precision mixing and stirring equipment structure of medicine and soil according to claim 5 is characterized in that: The device structure also includes an intelligent system, which includes: The sensor monitoring module is used to monitor the mixing uniformity, soil moisture and equipment operation status in real time and transmit the data to the control center; The command receiving module is used to receive the control command sent by the control center and send the control command to the corresponding power source; the power source includes a motor connected to the knife roller main shaft (7), a nozzle adjustment component of the sprayer, a flow adjustment component of the nozzle, and a moving part external to the power main shaft (11).

9. The self-propelled high-precision mixing and stirring equipment structure of medicine and soil according to claim 8 is characterized in that: The sensor monitoring module includes a humidity sensor, a rotation speed sensor and a particle flow sensor; and is connected to the control center in a wireless manner.

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