High-viscosity solid waste soil efficient anti-bonding stirring device and carbon storage method

Abstract

The invention discloses an efficient anti-bonding stirring device for high-viscosity solid waste soil and a carbon storage method. Comprising a hob, a rotating shaft, a vibration filter screen, a feeding hole and a discharging hole, the plurality of hobs are divided into a plurality of groups and are uniformly and annularly mounted on the rotating shaft; a plurality of rotating shafts are arranged, and the plurality of rotating shafts are stacked and mounted on the rack in a multi-row shape; a fluted disc is arranged on each rotating shaft; the rotating shafts in the same row are in transmission connection; the vibrating screen is obliquely arranged above a hopper at a feeding hole of the stirring device; in practical application, the stirring hob can keep clean and non-sticky even for high-viscosity solid waste soil which is high in viscosity and easy to adhere, so that the stirring uniformity and the stirring quality are remarkably improved; in the stirring process, carbon dioxide with different pressures and flows can be injected into the stirred high-viscosity solid waste soil through the air outlet holes, the fluidity of the high-viscosity solid waste soil is improved, and the carbon storage function in efficient stirring is achieved.

Description

Technical Field

[0001] This invention relates to a high-efficiency anti-adhesion mixing device and carbon storage method for high-viscosity solid waste soil, belonging to the fields of coastal soft soil improvement and solidification and roadbed filling operations. Background Technology

[0002] In the fields of soft soil improvement and solidification and subgrade filling in road engineering, mixing is an indispensable part of the road subgrade filling process, which directly affects the quality and performance of subgrade construction.

[0003] Traditional mixing devices often use impeller designs based on simple geometry and empirical data. While these designs can meet mixing requirements to some extent, they often result in uneven mixing, soil adhesion to the roller blades leading to decreased mixing efficiency, and poor mixing quality when dealing with high-viscosity, easily adherent sludge and slag solid waste materials.

[0004] Especially when dealing with high-viscosity and high-moisture solid waste materials such as silty soft soil foundations and deep foundation pit excavation, the limitations of traditional mixing rollers become increasingly apparent. They cannot effectively ensure the full mixing and uniform stirring of high-viscosity and high-moisture solid waste materials and externally mixed cement, lime, fly ash or special soft soil solidifying agents.

[0005] Against this backdrop, the present invention proposes a high-efficiency anti-adhesion mixing device and carbon storage method for high-viscosity solid waste soil based on the three-dimensional biomimetic structure of the hind limb teeth of dung beetles. The aim is to solve the problems of traditional mixing blades in the mixing process of high-viscosity and easily adhesive materials, and to improve mixing efficiency and mixing quality. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide an efficient anti-adhesion mixing device and carbon storage method for highly viscous solid waste soil, thereby solving the problem.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a high-efficiency anti-adhesion mixing device for high-viscosity solid waste soil, comprising roller cutters, rotating shafts, vibrating filter screens, a feed inlet, and a discharge outlet; several roller cutters are divided into multiple groups and uniformly installed in a ring on the rotating shafts; there are several rotating shafts, which are stacked in multiple rows on a frame; each rotating shaft is provided with a toothed disc; the rotating shafts in the same row are connected by transmission; the vibrating screen is inclinedly arranged above the feed inlet of the mixing device.

[0008] Preferably, the terminal teeth of the hind limbs of a dung beetle are selected as a sample, and its three-dimensional model size data are obtained by reverse engineering technology; that is, the height:width:thickness is 5:4:3; the hob is designed according to the three-dimensional model, and the size data is enlarged proportionally according to the design specifications and then welded onto the rotating shaft.

[0009] Preferably, each group of the hobs has at least 6 rows, with at least 3 hobs in each row.

[0010] Preferably, each group of adjacent hobs is arranged in a 60° tetrahedral intersecting spatial distribution, and each raised hob has a uniform arc twist angle of 30°~60° from bottom to top, with an average uniform arc twist angle of 45°.

[0011] Preferably, each group of adjacent hobs is staggered, with an stagger angle of 30° to 60°.

[0012] Preferably, the surface of the hob is provided with an air outlet, and the rotating shaft is connected to an air outlet channel provided inside the hob.

[0013] Preferably, the hobbing cutter is thickened, and the ratio of the top area to the bottom area is 1:12.

[0014] Preferably, the thickened wide edge of the hobbing cutter is twisted 15° to 30° to the wide edge of the bottom.

[0015] Preferably, the number of rotating shafts in each row increases gradually from top to bottom.

[0016] Preferably, the gear disk is connected to the transmission via a secondary gear, and each of the rotating shafts in each row is driven to rotate by at least one driving element.

[0017] Preferably, an air inlet channel is reserved in the middle of the rotating shaft, and the air inlet channel is connected to the air outlet channel, so that the gas introduced from the air inlet channel is blown out from the air outlet of the roller cutter, thereby realizing the simultaneous stirring of highly viscous solid waste soil and the acid-base neutralization chemical reaction with the added cement, lime, fly ash or special soft soil solidifying agent, thus achieving efficient carbon storage.

[0018] A method for efficiently preventing the adhesion of highly viscous solid waste soil to store carbon includes the following steps: Step 1: Selection and Preparation of Carbon Dioxide The main selection is compressed carbon dioxide of different concentrations as carbon storage gas because of its stable chemical properties and easy reaction with cement, lime, fly ash or special soft soil alkaline solidifying agent to form stable carbonate compounds. Step 2: Carbon dioxide introduction method: An air inlet channel is reserved in the middle of the rotating shaft of the stirring device. Preferably, the diameter of the air inlet channel is 4mm, which can provide a good air supply effect without causing eddy vibration; ensuring that the gas can smoothly enter the stirring area. Multiple air vents are provided on the surface of the roller cutter. These air vents are connected to the air venting channels inside the roller cutter to ensure that carbon dioxide can be evenly distributed in the highly viscous waste soil. A gas control valve is installed on the air intake channel. By adjusting the opening of the control valve, the amount and time of gas introduction can be precisely controlled to meet different carbon storage target requirements. Adjust the stirring speed according to the viscosity and characteristics of the high-viscosity solid waste soil to ensure that the high-viscosity solid waste soil can be fully mixed, while avoiding excessive stirring speed that may cause gas to escape. Based on the carbon storage target and the properties of the highly viscous waste soil, determine the appropriate stirring time to ensure that the carbon dioxide gas has enough time to react with the highly viscous waste soil; During the mixing process, the temperature of the high-viscosity solid waste soil can be adjusted as needed to promote the reaction between carbon dioxide and the components in the high-viscosity solid waste soil and improve carbon storage efficiency. Step 3: Carbon storage reaction process: Carbon dioxide gas first adheres to the surface of hydrated ion particles mixed with cement, lime, fly ash, or a special soft soil solidifying agent through physical adsorption, forming a thin film. As stirring progresses, the carbon dioxide gas gradually penetrates into the interior of the highly viscous waste soil, undergoing acid-base neutralization chemical reactions with metal ions such as sodium, calcium, magnesium, and silicon in the soil to generate stable carbonate compounds, thus achieving long-term carbon storage.

[0019] Beneficial effects This invention obtains the 3D model dimensions of the teeth on the hind limbs of dung beetles and designs a mixing roller based on this data. This biomimetic design gives the mixing roller a unique structure and texture, effectively reducing the adhesion of highly moist and viscous solid waste to the roller surface. In practical applications, even when faced with highly viscous and easily adhered materials, the mixing roller can remain clean and non-stick, significantly improving the uniformity and quality of mixing. Attached Figure Description

[0020] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the mixing roller and rotating shaft structure for high-viscosity and high-moisture solid waste soil according to the present invention; Figure 2 This is a schematic diagram of a mixing roller cutter for high-viscosity and high-moisture solid waste soil according to the present invention; Figure 3 This is a schematic diagram of the structure of a mixing device for high-viscosity and high-moisture solid waste soil according to the present invention; Figure 4 This is a schematic diagram of the air intake and air outlet channels of the present invention. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Please see Figures 1-4 This invention provides a technical solution for a mixing roller blade used in a high-efficiency anti-adhesion mixing device for highly viscous solid waste soil: The roller cutter 1 was designed based on the structure of the terminal teeth on the hind legs of dung beetles. Through reverse engineering, the 3D model dimensions of these teeth were obtained, and the roller cutter 1 was designed accordingly. This biomimetic design not only gives the mixing roller cutter 1 a unique non-sticky shape and structure, but also draws on efficient and stable mechanical principles found in nature. This allows the mixing roller cutter 1 to more effectively cut and mix highly moist and viscous waste soil during the mixing process, improving mixing efficiency and quality.

[0023] The designed hob cutter 1 is divided into multiple groups. According to the design specifications, the obtained three-dimensional model size data is enlarged proportionally and then welded onto the rotating shaft 2 to ensure a stable connection between the hob cutter 1 and the rotating shaft 2, so that each group of hob cutters 1 is uniformly installed on the rotating shaft 2 in a ring with a 60° arc.

[0024] To improve mixing efficiency, each set of roller cutters 1 is equipped with at least 3 rollers to ensure that the mixing area is fully covered during the mixing process.

[0025] Furthermore, each adjacent set of roller cutters 1 is arranged in a spatially intersecting pattern of 60° tetrahedrons, with the stagger angle controlled between 30° and 60°. This layout helps to reduce dead zones during the mixing process and improve the uniformity of mixing.

[0026] Vent holes 7 are provided on the surface of the cutter head 1. These vent holes 7 are connected to the venting channels 5 inside the cutter head 1. During the mixing process, carbon dioxide can be injected through the vent holes 7 to increase the fluidity of the highly viscous waste soil. This allows for simultaneous mixing of the highly viscous waste soil and the acid-base neutralization chemical reaction with the added cement, lime, fly ash, or special soft soil solidifying agent, thus achieving efficient carbon storage.

[0027] Air outlet channel 5: The air outlet channel 5 is located inside the hob 1 and is connected to the rotating shaft 2.

[0028] The rotating shaft 2 has an air intake channel 4 reserved in the middle, which is connected to the air outlet channel 5 to form a complete gas flow path.

[0029] Preferably, the hobbing cutter 1 is thickened, and the wide side of the thickened hobbing cutter 1 is twisted by the same arc as the wide side of the bottom B by 15°~30°.

[0030] In one embodiment, the roller cutter 1 is thickened so that the long side of the top A is 10mm and the wide side (thickness) is 10mm; the long side of the bottom B is 40mm and the wide side is 30mm; the distance between the top A and the bottom B is 50mm. The thickened wide side of the roller cutter 1 and the wide side of the bottom B are twisted at an equal arc of 15° along the height direction, making all four sides of the roller cutter 1 curved. This achieves sufficient structural strength, and the vent 7 is positioned in the middle of the widened section. In another embodiment, the corners of the widened roller cutter 1 are rounded to further improve the non-stick effect.

[0031] A technical solution for a high-efficiency anti-adhesion mixing device for high-viscosity solid waste soil: Multi-row stacked installation: The mixing device includes several rotating shafts 2, which are stacked in multiple rows on the frame 6 to form a three-dimensional mixing space. Preferably, the number of rotating shafts 2 in each row gradually increases from top to bottom. In one embodiment, there are 3 rows, with 3, 5, and 7 rotating shafts 2 respectively from top to bottom, so that the stacked rotating shafts 2 are narrow at the top and wide at the bottom to provide a strong initial mixing force. As the number of rotating shafts 2 increases, it helps to guide the high-moisture, high-viscosity solid waste soil to flow from the upper layer to the lower layer, forming a natural circulating mixing path. When the high-viscosity solid waste soil mixed with cement, lime, fly ash, or special soft soil solidifying agent is poured in through the funnel, the upper rotating shafts 2 first perform preliminary dispersion and mixing of the high-moisture, high-viscosity solid waste soil. Then, the high-moisture, high-viscosity solid waste soil flows downward under the action of gravity and is further refined and uniformly mixed by the lower rotating shafts 2.

[0032] Driven by the gear 3 and the auxiliary gear 31: Each rotating shaft 2 is equipped with a gear 3, and rotating shafts 2 traveling in the same direction are connected by a auxiliary gear 31. This transmission method ensures the operation between rotating shafts 2 traveling in the same direction, and the rotational speed of the rotating shaft 2 can be varied even when traveling in the same direction, depending on the adjustment of the number of teeth on the gear 3 and the auxiliary gear 31.

[0033] Each of the rotating shafts 2 in each row is driven to rotate by at least one drive component. The choice of drive component can be configured according to actual needs, such as an electric motor, to ensure that the stirring device has sufficient power and stability.

[0034] Preferably, an air inlet channel 4 is reserved in the middle of the rotating shaft 2, which is connected to the air outlet channel 5 inside the roller cutter 1. During the mixing process, carbon dioxide gas can be introduced into the mixing device through the air inlet channel 4, and the gas is then blown out from the air outlet hole 7 of the roller cutter 1 through the air outlet channel 5. This not only improves the mixing uniformity of the high-viscosity solid waste soil, but also promotes the internal acid-base neutralization chemical reaction between the high-viscosity solid waste soil and cement, lime, fly ash or special soft soil solidifying agent, thereby realizing the carbon storage function.

[0035] Preferably, in order to precisely control the gas flow rate and timing, a gas control valve 8 can be installed on the gas inlet channel 4. By adjusting the opening of the gas control valve 8, precise control of the gas flow can be achieved, thereby meeting different carbon storage target requirements.

[0036] Meanwhile, by precisely controlling the gas flow rate and timing, the target requirements for different carbon storage needs can be met, improving the flexibility and controllability of the production process.

[0037] Furthermore, the vibrating screen 7 is inclined and positioned above the feed inlet 9; it can screen out coarse particles with larger particle sizes, thereby achieving the classification of mud and sand in solid waste. In one embodiment, for the roller cutter 1 with a top A length of 10mm and a width (thickness) of 10mm, the mesh size of the vibrating screen 10 is 10mm*10mm, and it is tilted at 30°.

[0038] Furthermore, the bottom of the frame 6 is provided with an openable and closable discharge port 10.

[0039] The carbon storage operation method of a high-efficiency anti-adhesion mixing device for high-viscosity solid waste soil is as follows: Step 1: Gas Selection and Preparation Carbon dioxide is primarily chosen as the carbon storage gas because of its stable chemical properties and ease of acid-base neutralization reaction with cement, lime, fly ash, or special soft soil solidifying agents to form stable carbonate compounds.

[0040] As needed, carbon dioxide gas can be pretreated, such as by adjusting parameters like temperature, concentration, flow rate, and pressure, to meet different carbon storage requirements.

[0041] Step 2, Gas Introduction Method: An air inlet channel is reserved in the middle of the rotating shaft of the stirring device. Preferably, the diameter of the air inlet channel is 4mm, which can provide a good air supply effect without causing eddy vibration; ensuring that the gas can smoothly enter the stirring area.

[0042] Multiple air vents are provided on the surface of the roller cutter. These air vents are connected to the air venting channels inside the roller cutter to ensure that carbon dioxide can be evenly distributed in the highly viscous waste soil.

[0043] Gas control valve 8: A gas control valve is installed on the air inlet channel. By adjusting the opening of the control valve, the amount and time of gas flow can be precisely controlled to meet different carbon storage target requirements.

[0044] Mixing speed: Adjust the mixing speed according to the viscosity and characteristics of the waste soil to ensure that the waste soil can be fully mixed, while avoiding excessive mixing speed that may cause gas to escape.

[0045] Mixing time: Determine the appropriate mixing time based on the target carbon storage requirements and the properties of the highly viscous waste soil to ensure that the carbon dioxide gas has enough time to react with the highly viscous waste soil.

[0046] Temperature control: During the mixing process, the temperature of the high-viscosity solid waste soil can be adjusted as needed to promote the reaction between carbon dioxide and the components in the high-viscosity solid waste soil and improve carbon storage efficiency.

[0047] Step 3, Carbon Storage Reaction Process: Carbon dioxide gas first adheres to the surface of hydrated ion particles mixed with cement, lime, fly ash, or a special soft soil solidifying agent through physical adsorption, forming a thin film. As stirring progresses, the carbon dioxide gas gradually penetrates into the interior of the highly viscous waste soil, undergoing acid-base neutralization chemical reactions with metal ions such as sodium, calcium, magnesium, and silicon in the soil to generate stable carbonate compounds, thus achieving long-term carbon storage.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency anti-adhesion mixing device for high-viscosity solid waste soil, characterized in that: The utility model relates to a kind of high-viscosity solid waste carbon storage device, including hob, rotating shaft, vibrating screen, feed inlet, discharge outlet;Several hobs are divided into groups, and are uniformly annularly mounted on rotating shaft;Rotating shaft has several, and several rotating shafts are stacked in multiple rows and installed on rack;Each rotating shaft is provided with gear disc;The rotating shaft of the same row is transmission connection;Vibrating screen is obliquely arranged above the feeding inlet of the stirring device.

2. The high-viscous waste soil efficient anti-sticking stirring device according to claim 1, characterized in that: The end tooth of the rear limb of the dung beetle is selected as the sample, and the three-dimensional model size data is obtained by reverse engineering technology, i.e. height: width: thickness is 5:4:3;The hob is designed according to the three-dimensional model, and the size data is enlarged in proportion after design specification and welded on the rotating shaft.

3. The high-viscous waste soil efficient anti-sticking stirring device according to claim 2, characterized in that: Each group of the hob is provided with at least 6 rows, and each row has at least 3 hobs.

4. The high-viscous waste soil efficient anti-sticking stirring device according to claim 2, characterized in that: Each adjacent group of the hob is distributed in space according to an equilateral 60° tetrahedron, and each convex hob is twisted upward from the bottom at an equal radian angle of 30°-60°, with an average equal radian angle of 45°.

5. The high-bonded waste soil efficient anti-bonding mixing device according to claim 2, characterized in that: The hob surface is provided with gas outlet holes, and the rotating shaft is connected to the gas outlet channel arranged inside the hob.

6. The high-bonded waste soil efficient anti-bonding mixing device according to claim 1, characterized in that: The number of rotating shafts in each row gradually increases from top to bottom.

7. The high-bonded waste soil efficient anti-bonding mixing device according to claim 1, characterized in that: The hob gear disc is transmission connected by a pinion, and each rotating shaft in each row is driven to rotate by at least one driving member.

8. The high-bonded waste soil efficient anti-bonding mixing device according to claim 5, characterized in that: The rotating shaft has a gas inlet channel reserved in the middle, which is communicated with the gas outlet channel, so that the gas from the gas inlet channel is blown out from the gas outlet holes of the hob, realizing high-efficiency carbon storage.

9. A high-viscosity solid waste soil efficient anti-bonding carbon storage method using a high-viscosity solid waste soil efficient anti-bonding mixing device according to claims 1-9, characterized in that: The method comprises the following steps: Step one: carbon dioxide selection and preparation: Mainly select compressed carbon dioxide of different concentrations as carbon storage gas, because it is chemically stable and easy to react with cement, lime, fly ash or special soft soil alkaline curing agent to form stable carbonate compounds; Step two: carbon dioxide inlet mode: Reserve a gas inlet channel in the middle of the rotating shaft of the stirring device, preferably, the diameter of the gas inlet channel is 4mm, which can provide good gas supply effect without causing vortex vibration; Ensure that the gas can smoothly enter the stirring area; A plurality of gas outlet holes are arranged on the surface of the hob, which are communicated with the gas outlet channel inside the hob, to ensure that carbon dioxide can be uniformly distributed in high-viscosity solid waste; A gas control valve is arranged on the gas inlet channel, and the opening of the control valve is adjusted to accurately control the amount and time of gas inlet to meet different carbon storage target requirements; According to the viscosity and characteristics of high-viscosity solid waste, adjust the stirring speed to ensure that high-viscosity solid waste can be fully mixed, while avoiding too fast stirring speed causing gas to escape; According to the carbon storage target and the properties of high-viscosity solid waste, determine the appropriate stirring time to ensure that carbon dioxide gas has enough time to react with high-viscosity solid waste; During the stirring process, the temperature of high-viscosity solid waste can be adjusted as needed to promote the reaction between carbon dioxide and the components in high-viscosity solid waste, and improve the carbon storage efficiency; Step three: carbon storage reaction process: The carbon dioxide gas is firstly attached to the surface of ion particles of the hydrated cement, lime, fly ash or special soft soil solidifying agent by physical adsorption to form a thin film. With the deepening of the stirring, the carbon dioxide gas gradually penetrates into the high-sticky solid waste soil, and reacts with sodium, calcium, magnesium, silicon and other metal ions in the high-sticky solid waste soil to generate stable carbonate compounds, thereby realizing long-term carbon storage.

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