Mixing device and method for muck and medicament mixture

Abstract

The invention relates to a mixing device and method for a muck and medicament mixture, a mixing drum is placed at a certain inclination angle alpha, a lower opening of the mixing drum is provided with a constant-speed quantitative discharge device, and a plurality of layers of mixing blades are mounted in the lower section of the mixing drum; muck enters from an upper opening of the mixing drum, the height of the muck always exceeds a certain height of the blade on the uppermost layer, meanwhile, a medicament is input into the mixing drum according to a set proportion, and the stirring blades on the adjacent layers are made to coaxially and oppositely rotate in opposite directions according to a set rotating speed; meanwhile, a constant-speed quantitative discharging device at a lower opening of the mixing barrel is used for discharging the mixture of the muck and the medicament according to a set speed; continuous production of the mixture of the muck and the medicament can be formed; according to the device, the phenomena that viscous muck adheres to the rotating shaft and the stirring blades and rotates along with the rotating shaft and the stirring blades, and viscous muck blocks integrally move to a low-density area can be eliminated, and the stirring uniformity of the viscous muck and chemicals is effectively improved; continuous production and rapid and uniform stirring are realized, so that the production efficiency is remarkably improved.

Description

Technical Field

[0001] The invention belongs to the field of soil mixing, and in particular, relates to a device and method for mixing clay soil. Background Art

[0002] Civil engineering construction, especially underground engineering construction, will discard a large amount of slag, causing a great environmental load. The slag can be converted into a building material resource by mixing it with a water absorbent to reduce the moisture content of the slag, or mixing it with a stabilizer to make stabilized soil, or mixing it with a curing agent to make solidified soil. However, it is difficult to mix sticky slag and reagents evenly with existing devices and methods. The sticky slag often adheres to the rotating shaft and the mixing blades and rotates with them, so effective mixing cannot be achieved; or the sticky slag itself sticks into large lumps, and under the push of the mixing blades, the soil lumps move as a whole to the low-density area, and effective mixing cannot be achieved. Since it is difficult to mix sticky slag and various reagents evenly, it seriously affects product quality and construction efficiency. Summary of the invention

[0003] In order to solve the problem that it is difficult to evenly mix sticky slag and reagents in existing devices and methods, the present invention proposes a mixing device and method for a mixture of sticky slag and reagents.

[0004] After testing and analyzing the actual engineering results, it was found that if the clay soil is subjected to displacement restrictions and sufficiently high density, with multiple layers of mixing blades and adjacent layers of blades rotating concentrically and relatively in opposite directions, the reasons why the clay soil and the agent are difficult to mix evenly, namely, "adhering to the rotating shaft and the mixing blades and rotating with them" and "the soil lumps move as a whole to the low-density area under the push of the mixing blades", can be eliminated, thereby greatly improving the mixing uniformity and work efficiency of the clay soil and the agent.

[0005] The present invention provides a mixing device and method for a mixture of slag and a chemical agent. A mixing drum is placed at an inclination angle α, and a constant-speed quantitative discharge device is provided at the lower end of the mixing drum. A mutual shearing stirring component is arranged in the lower section of the mixing drum. The mutual shearing stirring component is a multi-layer stirring blade installed along the axial direction, and the stirring blades of adjacent layers rotate in opposite directions coaxially. Slag is input from the upper end of the mixing drum at a set rate, and the height of the slag is always not lower than the height set in the upper section of the mixing drum. At the same time, the chemical agent is input into the slag at a set ratio, and the stirring blades of adjacent layers in the mutual shearing stirring component rotate in opposite directions at set rotation rates respectively. At the same time, the constant-speed quantitative discharge device at the lower end of the mixing drum discharges the mixed slag and chemical agent mixture at a set rate. Continuous production of the slag and chemical agent mixture can be formed.

[0006] The mixing device and method of the slag and agent mixture of the present invention can achieve the following effects: the gravity of the slag located within the set height of the upper section of the mixing drum makes the slag located in the mutual shear stirring component area of ​​the lower section of the mixing drum at a relatively high density, so that the slag located in the mutual shear stirring component area cannot form a large soil block and freely shift as a whole when being stirred, and can only withstand the repeated stirring of the stirring blades; and because the stirring blade groups of adjacent layers rotate in opposite directions, the slag cannot adhere to the rotating shaft and the stirring blades. Therefore, if the medicine is contained in it, the medicine and the slag can be mixed evenly. If the fixed speed and quantitative discharge device at the lower mouth of the mixing drum discharges the mixed slag and agent mixture at a set rate, and at the same time, the slag is input at a corresponding rate and the medicine is input at a set ratio at the upper mouth of the mixing drum, and at the same time, the multi-layer stirring blade group on the mutual shear stirring component rotates at a set speed to shear and stir the slag, then with the help of the gravity of the slag, continuous production of the slag and agent mixture can be formed.

[0007] The device of the method for mixing a mixture of slag and chemical comprises a mixing drum, a mutual shearing stirring component and a constant speed and quantitative discharging device, and is characterized in that: the mixing drum is divided into an upper section and a lower section, a mutual shearing stirring component is arranged in the lower section of the mixing drum, the mutual shearing stirring component comprises a plurality of stirring blades arranged along the axial direction of the mixing drum, the stirring blades in adjacent layers rotate in opposite directions coaxially, and the bottom end of the mixing drum is connected to a device for discharging the mixture of slag and chemical at a constant speed and quantitatively.

[0008] Preferably, the mutual shear stirring assembly comprises a rotating shaft located at the center axis of the mixing barrel and a plurality of stirring blades arranged along the axial direction; the rotating shaft is a combined structure in which a hollow cylindrical outer shaft is sleeved on an inner shaft coaxially therewith, and the outer shaft and the inner shaft are respectively connected with a plurality of stirring blades, and the stirring blade layer on the inner shaft is arranged alternately with the stirring blade layer connected to the outer shaft, and the outer shaft and the inner shaft are rotated in opposite directions relative to each other to drive the stirring blades in adjacent layers to rotate in opposite directions coaxially.

[0009] Preferably, the mutual shear stirring component is composed of a rotating shaft located at the center axis of the mixing barrel and a plurality of stirring blades arranged along the axial direction, the rotating shaft is a hollow cylindrical shaft or a solid shaft, the inner side of the lower section of the barrel wall of the mixing barrel is provided with a plurality of stirring blades, the rotating shaft is also provided with a plurality of stirring blades, and the stirring blades of each layer on the mixing barrel and the stirring blades of each layer on the rotating shaft are arranged alternately; the mixing barrel and the rotating shaft rotate in opposite directions relative to each other, driving the stirring blades of adjacent layers to rotate in opposite directions relative to each other around the axis of the mixing barrel; or one of the mixing barrel and the rotating shaft rotates while the other is stationary, so that the stirring blades of adjacent layers rotate in opposite directions relative to each other with the same axis.

[0010] Preferably, the mutual shear stirring assembly is constructed by arranging two or more rotation centers in the mixing barrel, and each rotation center is provided with a set of multi-layer stirring blades installed axially, and the stirring blades of adjacent layers rotate coaxially and relatively in opposite directions; the multi-layer stirring blades installed axially at each rotation center can be a combination of any one of the aforementioned two structures or a combination of the aforementioned two structures.

[0011] Preferably, the number of layers of stirring blades of each group of mutual shear stirring components is 2-18 layers, the number of blades contained in each layer of stirring blades is 2-8, the angle between the long axis of the blade and its rotation axis is in the range of 80°-100°, and the angle between the short side of the blade and the rotation axis is in the range of 45°-135°; ribs are provided on the blades, the number of ribs on each blade is 0-10, the height of the ribs is in the range of 1cm-8cm, the ribs are placed on the soil facing surface when the blades rotate, the angle between the long axis of the ribs and the long axis of the blades is in the range of 20°-160°, and the interlayer spacing between adjacent layers of stirring blades is in the range of 10cm-50cm. The above-mentioned parameters of the stirring blades are selected to make the slag in the mixing barrel stirred as chaotically and mixed as evenly as possible; the required data are selected accordingly for slag with different characteristics and different application scenarios as well as various actual device parameters and process parameters to achieve better stirring effect.

[0012] Preferably, the speed of the inner shaft or outer shaft of the shear mixing assembly is in the range of 10-200 r / min, and the speed ratio of the inner shaft to the outer shaft is in the range of 0.2-3.0; the speed of the rotating shaft or the mixing barrel is in the range of 0-100 r / min. The speed of the mixing blade has a great influence on the uniformity of the mixing of the slag and the reagent, which depends on the properties of the slag and is restricted by the number and parameters of the mixing blades in the shear mixing assembly and the output rate requirements of the slag and the reagent mixture.

[0013] Preferably, multiple layers of spiral propulsion blades and / or pre-mixing blades may be provided in the area above the mutual shearing and mixing assembly on the outer shaft or the rotating shaft; the spiral propulsion blades squeeze and transport the slag to the area of ​​the mutual shearing and mixing assembly by rotating around the axis to control the density of the slag in the area; the multiple layers of pre-mixing blades are used to perform preliminary mixing of the agent input into the mixing barrel with the slag.

[0014] The inclination angle of the mixing drum is in the range of 0°-90°. The selection of the inclination angle of the mixing drum is to ensure that the slag in the area of ​​the mutual shearing and stirring assembly is in a sufficiently dense state. In order to make full use of the gravity of the slag, the inclination angle of the mixing drum should be in the range of 45°-90°. The higher the viscosity of the slag, the larger the inclination angle should be. When a small inclination angle is unavoidable, it is usually necessary to use a spiral propulsion blade in the area above the mutual shearing and stirring assembly on the outer shaft or the rotating shaft.

[0015] As a preferred option, the input of the reagent can be selected as follows: a support blade is set on the inner side of the mixing drum wall in a range not lower than the upper end surface of the shear stirring assembly, and a reagent input pipe is set on the back of the soil of the part of the stirring blade fixed on the support blade or the inner side of the mixing drum wall. The reagent input pipe can be of different lengths, and its length range is 10%-90% of the length of the stirring blade; when the reagent is input in powder or paste form, a spiral conveying blade can be installed in each reagent input pipe to transport it by spiral propulsion input; when the reagent is input in slurry, it can be pumped through each reagent input pipe. The input of the reagent can also be adopted in a variety of ways, for example: through a pipeline set in a hollow rotating shaft, a hollow inner shaft or the gap between the outer shaft and the inner shaft, the reagent is input through the outlet of the stirring blade; or a corresponding amount of the reagent is placed on the slag before the slag enters the mixing drum.

[0016] The constant speed and quantitative discharge device at the lower opening of the mixing barrel can be a known method such as an impeller feeder, a screw conveyor, a scraper conveyor, or a limited opening size.

[0017] The present invention can be specifically implemented by the following steps: in the initial stage of the production of the mixture of slag and reagent, the constant speed and quantitative discharge device is closed, and the sieved slag is input into the mixing drum at a set rate and weight; during this period, the reagent is input according to the set ratio of the reagent to the slag, and the mutual shear stirring component is started to make the stirring blade rotate at a set speed; when the slag input into the mixing drum exceeds the set height of the upper section of the mixing drum, the constant speed and quantitative discharge device is started, and the mixture of slag and reagent is output at a designed rate and weight, and the input rate of the slag and the output rate of the mixture of slag and reagent are coordinated. , so as to keep the slag in the upper section of the mixing drum not lower than the set height at all times; when the output of the mixture of slag and reagent is greater than the amount of slag in the mixing drum when the constant-speed quantitative discharge device is turned on, the mixture of slag and reagent discharged from the constant-speed quantitative discharge device is a qualified mixture of slag and reagent product; ensure that the input rate and weight of the slag and reagent input into the mixing drum match the rate and weight of the mixture of slag and reagent discharged from the constant-speed quantitative discharge device, and keep the blades in the mutual shear mixing assembly rotating at the set speed and forward and reverse speed ratio, so as to realize the continuous production of the mixture of slag and reagent.

[0018] The beneficial effects of the present invention are as follows: the mechanism constructed by the present invention makes the sticky slag therein have a sufficiently high density and displacement restriction, and adopts a multi-layer stirring blade to make coaxial relative reverse rotation through adjacent layers of blades, which can eliminate the defects of the prior art that make it difficult to mix the clay and the agent evenly, namely, "the sticky slag adheres to the rotating shaft and the stirring blades and rotates therewith" and "the sticky slag lumps move as a whole to the low-density area under the push of the stirring blades", thereby greatly improving the uniformity of mixing the sticky soil and the agent.

[0019] The mixing device of the present invention, in addition to the annular mixing by the stirring blades, also allows the slag to make an axial relative movement with the stirring blades along the rotating shaft, so that the slag and the reagent can be mixed evenly without dead angles; the existing mixing device only relies on the stirring blades to make annular mixing, and the slag and the stirring blades do not have an axial relative movement along the rotating shaft; even if the slag and the reagent within the rotating range of the blades can be mixed evenly, some slag will remain between the blade layers, especially on the side walls of the container without being mixed.

[0020] The present invention can form continuous production of a mixture of slag and reagents, greatly improving production efficiency. The existing mixing device adopts a production method in which the mixture is discharged after each mixing is completed before the subsequent mixture can be produced; the pause when the mixture is discharged reduces production efficiency; especially when mixing sticky slag, the mixture adhered to the mixing device is difficult to pour out; or it takes longer to remove the slag adhered to the blades and the rotating shaft; or the slag adhered to the blades and the rotating shaft reduces the volume ratio of the subsequent mixture; these obviously affect production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a mixing device and method for a mixture of slag and reagent provided by the present invention;

[0022] Figure 2 A schematic diagram of the structure of a mixing device for a first type of slag and reagent mixture provided by the present invention;

[0023] Figure 3 A schematic diagram of the structure of a second mixing device for a mixture of slag and reagent provided by the present invention;

[0024] Figure 4 A top view of the structure of a mixing device for a third type of slag and reagent mixture provided by the present invention;

[0025] Figure 5 A top view of the structure of a mixing device for a fourth type of slag-pharmaceutical mixture provided by the present invention;

[0026] Figure 6 A schematic diagram of the structure of the mixing device for the mixture of slag and reagent provided by the present invention, in which the reagent is inputted by spiral;

[0027] Figure 7 for Figure 6 Section at AA position of the mixing device for the mixture of medium slag and reagent;

[0028] Figure 8 This is a schematic diagram of a mixing device and a production method for a mixture of slag and reagents according to Example 2 of the present invention.

[0029] in, Figure 1-Figure 8 middle:

[0030] 1. Mixing drum; 11. Upper section of mixing drum; 12. Lower section of mixing drum; 13. Upper support beam; 14. Lower support beam; 15. Rotary bearing; 2. Mutual shear stirring assembly; 21. Forward rotating blades; 22. Reverse rotating blades; 23. Frame member; 231. Upper frame; 232. Side frame; 233. Lower frame; 3. Constant speed and quantitative discharge device; 4. Rotating shaft; 41. Inner shaft; 42. Outer shaft; 43. Rolling bearing; 44. Thrust bearing; 45, spiral propulsion blade; 5, driving device; 51, first power source; 52, gear assembly; 53, second power source; 54, gear; 55, rack; 6, bracket structure; 61, roller support; 7, reagent input device; 71, feed tank; 72, spiral conveying blade; 8, drum screen; 9, slag; 91, slag in the upper section of the mixing drum; 92, slag within the range of the mutual shear mixing assembly; 10, belt conveyor. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] Before explaining the working principle of the present invention in detail, the description of the present invention needs to be further explained: In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a welding connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1As shown, the main points of the mixing device and implementation method of the slag and reagent mixture provided by the present invention are: a mixing drum 1 is tilted at a certain angle α, and a constant speed and quantitative discharge device 3 is provided at its lower mouth, and the mixing drum 1 is divided into an upper section 11 and a lower section 12; the lower section 12 of the mixing drum 1 is provided with a mutual shear stirring component 2, and the mutual shear stirring component 2 is a multi-layer stirring blade installed along the axial direction, and the positive rotating blades 21 and the reverse rotating blades 22 of the adjacent layers rotate relative to each other coaxially; it should be noted that the positive rotating blades 21 and the reverse rotating blades 22 here are described for ease of understanding, and the respective rotation directions of the two are not specifically limited, only indicating that the relative rotation directions of the two are opposite; the slag 9 is input from the upper mouth of the mixing drum 1 at a set rate, and under the action of its own weight (when a spiral propulsion blade is provided, it is the combined effect of the self-weight and the spiral propulsion blade) The lower slag 9 slides down along the inclined mixing drum 1, so that the height of the slag 9 exceeds the mutual shear stirring component 2, and the accumulation reaches the set height of the upper section 11 of the mixing drum 1. The gravity of the slag 91 in the upper section 11 of the mixing drum can make the slag 92 within the range of the mutual shear stirring component 2 of the lower section 12 at a relatively high density and obtain a sufficiently high constraint force, so that the slag 92 within the range of the mutual shear stirring component 2 cannot form a large soil mass and freely shift as a whole when being stirred; the required height of the slag depends on the density, viscosity and consistency of the slag and the form of the stirring blades in the mutual shear stirring component 2, which can be determined through experiments. The required height requirement of the slag 91 in the upper section 11 of the mixing drum is that the distance from the lowest point of the soil surface of the slag 91 in the upper section 11 of the mixing drum to the highest point of the blades in the mutual shear stirring component 2 should not be less than 50 cm, so that the slag 91 in the upper section 11 of the mixing drum cannot turn over or arch up when the stirring blades are stirring.

[0035] In this case, if the mutual shearing and stirring assembly 2 is turned on, and the positive rotating blades 21 and the reverse rotating blades 22 of the adjacent layers rotate in opposite directions with the same axis, the slag 92 within the mutual shearing and stirring assembly 2 cannot form a large soil block, and there is no space to tolerate the free displacement of the soil block as a whole; and because the positive rotating blades 21 and the reverse rotating blades 22 of the adjacent layers rotate in opposite directions, the slag 92 within the mutual shearing and stirring assembly 2 is sheared and stirred, so that the slag 92 within the mutual shearing and stirring assembly 2 cannot adhere to the rotating shaft 4 and the stirring blades. Therefore, if the slag 92 within the mutual shearing and stirring assembly 2 contains medicine, the medicine and the slag can be mixed evenly; if the constant speed and quantitative discharge device 3 at the lower end of the mixing barrel 1 discharges the mixed slag and medicine mixture at a set rate, and at the same time, the slag is input at a corresponding rate at the upper end of the mixing barrel 1, and the medicine is input at a set ratio, and the mutual shearing and stirring assembly 2 is stirred at a set speed, continuous production of the slag and medicine mixture can be formed.

[0036] As a preferred embodiment, when the mutual shear stirring assembly 2 is mainly a structure in which the inner and outer shafts of the same axis respectively drive the stirring blades thereon to rotate in opposite directions relative to each other, as Figure 2 As shown, it includes forward rotating blades 21 and reverse rotating blades 22, an inner shaft 41 and an outer shaft 42 coaxial therewith; the outer shaft 42 is a hollow cylindrical shaft sleeve outside the inner shaft 41, and the outer shaft 42 and the inner shaft 41 are connected by rolling bearings 43 but are not limited to this method; the upper ends of the outer shaft 42 and the inner shaft 41 are connected to a driving device 5, and the driving device 5 mainly includes a gear assembly 52 and a first power source 51 (including but not limited to an electric motor, a hydraulic motor), and the rotation direction is converted by the gear assembly 52 so that the rotation direction of the outer shaft 42 is opposite to the rotation direction of the inner shaft 41.

[0037] The inner shaft 41 is fixedly connected to 19 layers of forward rotating blades 21 within the range of the mutual shear mixing assembly 2, and the forward rotating blades 21 rotate forwardly with the inner shaft 41; within the range of the mutual shear mixing assembly 2, there is a frame-shaped component 23 fixedly connected to the lower end of the outer shaft 42, the lower end of the frame-shaped component 23 is connected to the inner shaft 41 through a rolling bearing 43, and the connected inner shaft 41 and the frame-shaped component 23 are fixed to the lower support beam 14 through a thrust bearing 44; the lower end of the frame-shaped component 23 can also be installed on the inner shaft 41 through a rolling bearing 43, and the inner shaft 41 is installed on the lower support beam 14 through a thrust bearing 44; 1-9 layers of reverse rotating blades 22 are fixed on the inner side of the side frame 232 of the frame-shaped component 23, and the reverse rotating blades 22 rotate in the reverse direction with the outer shaft 42. The frame-shaped member 23 and the counter-rotating blades 22 thereon can be on the same vertical plane, or can form a certain form of curved surface (for example, the upper frame 231 and the lower frame 233 of the frame-shaped member 23 are twisted at a certain angle with respect to each other in a plane perpendicular to the outer shaft 42); one end of the counter-rotating blade 22 is fixed to the side frame 232 of the frame-shaped member 23, and the other end can point to the inner shaft 41 or not; the soil-facing surface of the side frame 232 of the frame-shaped member 23 is an inclined surface preferably at an angle of 90°-150° with the wall of the mixing drum 1, which helps to push the slag toward the center of the mixing drum 1; the frame-shaped member 23 can be composed of two groups of counter-rotating blades 22 respectively fixed to two side frames 232, that is, its cross section perpendicular to the axial direction is a straight line; it can also be composed of three or more groups of counter-rotating blades 22 respectively fixed to three or more side frames 232, that is, its cross section is three or more rods radially arranged at a certain angle.

[0038] Each layer of forward rotating blades 21 and each layer of reverse rotating blades 22 are arranged alternately, that is, the layers adjacent to each layer of forward rotating blades 21 are reverse rotating blades 22, and vice versa. The lower support beam 14 is fixedly connected to the lower end of the mixing drum 1 shearing and stirring assembly 2, and the upper end of the upper section 11 of the mixing drum 1 is fixedly connected to the upper support beam 13, and the upper support beam 13 is connected to the outer shaft 42 through a rolling bearing 43. In addition to using a driving device, the mechanism can simultaneously drive the outer shaft 42 and the inner shaft 41 to rotate in opposite directions relative to each other through the gear assembly 52, such as Figure 2 or two driving devices are used to drive the outer shaft 42 and the inner shaft 41 to rotate in opposite directions. The driving device can be placed on the top of the mixing drum 1 or on the bottom of the mixing drum 1, or the two driving devices can be placed on the top and bottom of the mixing drum 1 respectively.

[0039] As a preferred embodiment, when the mutual shear stirring assembly 2 mainly adopts the forward rotating blade 21 driven by the rotating shaft 4, and the reverse rotating blade 22 is fixed to the inner side of the cylinder wall of the rotatable lower section 12 of the mixing cylinder 1, as shown in FIG. Figure 3 As shown, the upper section 11 of the mixing drum 1 is disconnected from the lower section 12 of the mixing drum 1; the upper section 11 of the mixing drum 1 is fixedly supported on the support structure 6; the outer side of the lower section 12 of the mixing drum 1 can be supported on the support structure 6 by rollers 61, and its lower end can be supported on the annular support structure of the support structure 6 by rolling connection; the upper end of the cylinder wall of the lower section 12 of the mixing drum 1 and the lower end of the cylinder wall of the upper section 11 of the mixing drum 1 are connected by a slewing bearing 15 (other known methods, such as a turntable bearing, etc. can also be used); the lower section 12 is connected to the inner ring of the slewing bearing 15, and the upper section 11 is connected to the outer ring of the slewing bearing 15; at the disconnection point between the upper section 11 and the lower section 12, known measures are adopted to prevent the entry of mud, including but not limited to installing a baffle at the position where the lower end of the upper section 11 crosses the slewing bearing 15 to the upper end of the lower section 12 connected to the slewing bearing 15.

[0040] The rotating shaft 4 is located at the center of the mixing drum 1, and its upper part can be connected to the upper support beam 13 fixed to the upper end of the upper section 11 of the mixing drum 1 by a rolling bearing 43, and its upper end is connected to a driving device 5 by a known method; a lower support beam 14 is provided on the annular structure at the lower end of the lower section 12 of the mixing drum 1, and the lower end of the rotating shaft 4 can be connected to the lower support beam 14 by a thrust bearing 44; the rotating shaft 4 is fixedly connected to the 1-9 layers of forward rotating blades 21 within the range of the mutual shear stirring assembly 2 of the lower section 12 of the mixing drum 1, and the forward rotating blades 21 rotate forwardly with the rotating shaft 4 The lower section 12 of the mixing drum 1 is driven by the second driving device. The outer side of the wall of the lower section 12 of the mixing drum 1 is provided with a circumferential rack 55. The gear 54 and the circumferential rack 55 fixedly connected to the outer side of the wall of the lower section 12 of the mixing drum 1 are driven by the second power source 53 to drive the lower section 12 of the mixing drum 1 to rotate in the opposite direction to the rotation axis 4. 1-9 layers of reverse rotating blades 22 are fixedly provided on the inner side of the wall of the lower section 12 of the mixing drum 1. The reverse rotating blades 22 rotate in the opposite direction with the forward rotating blades 21 along with the lower section 12 of the mixing drum 1. The layers of forward rotating blades 21 and the layers of reverse rotating blades 22 are arranged alternately, that is, the layers of reverse rotating blades 22 are adjacent to each layer of forward rotating blades 21, and vice versa.

[0041] The above-mentioned mutual shearing and stirring assembly 2 in which the forward rotating blades 21 are driven by the rotating shaft 4 and the reverse rotating blades 22 are fixed to the inner side of the cylinder wall of the lower section 12 of the mixing cylinder 1, also includes the following variants:

[0042] 1) The lower section 12 of the mixing drum 1 and the upper section 11 of the mixing drum 1 are an integral whole, the mixing drum 1 remains stationary, and only the rotating shaft 4 located at the center of the mixing drum 1 is connected to a known driving device to drive the forward rotating blades 21 on the rotating shaft 4 to rotate, so that the forward rotating blades 21 on the rotating shaft 4 at the center of the mixing drum 1 and the reverse rotating blades 22 fixedly arranged on the inner side of the cylinder wall of the lower section 12 of the mixing drum 1 generate relative reverse rotation;

[0043] 2) The lower section 12 of the mixing drum 1 and the upper section 11 of the mixing drum 1 are an integral whole, and only the mixing drum 1 is connected to the driving device. The power source of the driving device is a combination of a gear and a rack and is not limited to this method to provide a drive to rotate the mixing drum 1 as a whole, and at the same time drive the reverse rotating blades 22 fixedly arranged on the inner side of the cylinder wall of the lower section 12 to rotate; while the rotating shaft 4 located at the center of the mixing drum 1 and the forward rotating blades 21 fixed thereon are stationary and do not rotate, so the forward rotating blades 21 on the rotating shaft 4 at the center of the mixing drum 1 and the reverse rotating blades 22 fixedly arranged on the inner side of the cylinder wall of the lower section 12 of the mixing drum 1 generate relative reverse rotation;

[0044] 3) The lower section 12 of the mixing drum 1 and the upper section 11 of the mixing drum 1 are an integral body. The rotating shaft 4 located at the center of the mixing drum 1 and the forward rotating blades 21 fixed thereon are driven to rotate forward by a driving device. The mixing drum 1 is driven by another driving device to rotate the mixing drum 1 as a whole in the reverse direction, and at the same time, the reverse rotating blades 22 fixedly arranged on the inner side of the cylinder wall of the lower section 12 are driven to rotate in the reverse direction. Then, the forward rotating blades 21 on the rotating shaft 4 at the center of the mixing drum 1 and the reverse rotating blades 22 fixedly arranged on the inner side of the cylinder wall of the lower section 12 of the mixing drum 1 produce relative reverse rotation. The above-mentioned layers of forward rotating blades 21 and layers of reverse rotating blades 22 are arranged alternately, that is, the layers of reverse rotating blades 22 are adjacent to each layer of forward rotating blades 21, and vice versa. Since the adjacent layers of blades rotate in the opposite direction, it is impossible for the debris to adhere to the rotating shaft 4 and the mixing blades.

[0045] When the mutual shear stirring assembly 2 mainly includes the following structure: two or more rotation centers are set in the mixing barrel 1, and each rotation center is respectively provided with a set of multi-layer stirring blade groups installed along the axial direction, and the stirring blade groups of adjacent layers rotate in opposite directions with the same axis; the multi-layer stirring blade groups installed along the axial direction at each rotation center can be a combination of any one of the above two structures or a combination of the above two structures. Figure 4 As shown, when a structure is adopted in which concentric inner and outer shafts drive the stirring blades thereon to rotate in opposite directions, the distance between the rotation centers can be smaller than the rotation diameter of the frame structure, that is, the stirring range of each frame structure has a certain overlap; in this case, the frame structure of each rotation center is inserted into the gap of the frame structure of the adjacent rotation center, and rotates at a set speed, so as to avoid collision of the frame structures. Figure 5 shown.

[0046] The number of mixing blades, the form of blades and their ribs, the distance between blades, the angle between the long axis of blades and the rotating shaft 4, the angle between the short side of blades and the rotating shaft 4 and other parameters have a great influence on the uniformity of the mixture of slag and reagents, and their values ​​are affected by the properties of slag and the discharge rate of the mixture after mixing slag and reagents. The more viscosity and the faster the discharge rate, the more mixing blades there are. Generally, each group of shear mixing components has 2-18 layers; each layer has 2-8 blades; the width of the blade should be 3-10cm; the angle between the long axis of blade 3 and the axis of rotating shaft 4 should be 80°-100°, and the angle between the short side of blade 3 and the axis of rotating shaft 4 should be 45°-135°. 0-10 ribs can be set on each layer of blades, and the height of the ribs should be 1-8cm. The ribs are placed on the soil-facing surface when the mixing blades rotate (for example: when the rotating shaft 4 rotates counterclockwise, if the clockwise angle between the short side of the blade and the axis of the rotating shaft 4 is 45°~90°, the ribs are installed on the lower surface of the blade; and when the clockwise angle between the short side of the blade and the axis of the rotating shaft 4 is 90°~135°, the ribs are installed on the upper surface of the blade); the angle between the long axis of the rib and the long axis of the blade 3 is 20°-160°. In order to create a more chaotic movement trajectory of the slag during the mixing process, so that the slag and the reagent are mixed more evenly, the size, inclination angle, number and form of the ribs of the same layer of blades can be the same or different. The spacing between each blade layer can be equal or unequal, for example: the spacing between the two blade layers decreases from top to bottom, and the spacing between adjacent layers of blades should be 10-50cm.

[0047] The mixing of soil and reagents can only be uniform if the mixing times are high enough. Existing experimental studies have shown that within a certain range of times, the number of times the mixing blade disturbs the soil at any point is proportional to the uniformity of the mixing. Referring to existing studies, the number of times the mixing blade stirs a unit volume of soil and reagent mixture is preliminarily calculated using the following formula (1).

[0048]

[0049] Among them, T represents the number of stirring times; M1 and M2 represent the number of stirring blades of the forward rotating blade and the reverse rotating blade respectively; N1 and N2 represent the rotation speed of the forward rotating blade and the reverse rotating blade respectively (r / min); v represents the relative movement speed of the soil in the multi-layer shear section (m / min). In addition, it is also related to factors such as the form, width and inclination of the blade.

[0050] The rotation speed and the forward and reverse speed ratio of the stirring blades of the mutual shear stirring component 2 are mainly affected by the properties of the slag. The rotation speed of the slag with high viscosity is required to be fast; secondly, it is affected by the discharge rate requirement of the slag and reagent mixture. The faster the discharge rate, the higher the required rotation speed, and the more stirring blades, the lower the required rotation speed; the rotation speed range of the inner shaft or outer shaft of the mutual shear stirring component 2 is 10-200r / min, and the rotation speed ratio of the inner shaft to the outer shaft is preferably 0.2-3.0; the rotation speed range of the rotating shaft 4 or the mixing barrel 1 is 0-100r / min; the number of stirring times of the stirring blade on a unit volume of the slag and reagent mixture is preferably 100-3000r / m.

[0051] Preferably, multiple layers of spiral propulsion blades may be provided in the area above the shearing and mixing assembly 2 on the outer shaft 42 or the rotating shaft 4; the spiral propulsion blades squeeze and transport the slag to the area of ​​the shearing and mixing assembly 2 by rotating around the shaft to control the density of the slag in the area; the use of spiral propulsion blades can increase the propulsion force on the slag; this can ensure the stability of the slag running speed, and can also improve the running power of the slag when the inclination angle α of the mixing barrel 1 is small. The angle between the spiral propulsion blade and the rotating shaft 4 can be determined according to the rotating speed of the rotating shaft 4 and the discharge rate of the slag and the agent mixture discharged by the constant speed and quantitative discharge device 3, so as to ensure that the propulsion rate of the spiral propulsion blade on the slag is coordinated with the discharge rate of the agent mixture at the constant speed and quantitative discharge device 3; or a single power-driven spiral propulsion blade 11 is used in the outer sleeve of the rotating shaft 4, and the spiral propulsion blade can also be driven when the outer sleeve rotates.

[0052] Preferably, a plurality of pre-mixing blades may be provided in the area above the mutual shear mixing assembly 2 on the outer shaft 42 or the rotating shaft 4. The plurality of pre-mixing blades are used to preliminarily mix the reagent input into the mixing barrel 1 with the slag so that the reagent is evenly distributed macroscopically in the slag. The pre-mixing blades may adopt the same parameters as the mixing blades in the mutual shear mixing assembly 2.

[0053] Preferably, the inclination angle α of the mixing drum 1 is preferably between 45° and 90°; this mainly depends on the viscosity coefficient and internal friction coefficient of the slag, so as to ensure that the slag can slide smoothly and that the slag 32 in the lower section 12 of the mixing drum 1 is in a sufficiently dense state, which can be determined through experiments based on the target slag to be treated; in addition, the form of the stirring blades also affects the setting of the inclination angle α of the mixing drum 1; when spiral propulsion blades are installed in the area above the shear stirring assembly 2 on the outer shaft 42 or the rotating shaft 4, the inclination angle α of the mixing drum 1 can also be 0°-45°.

[0054] The constant speed quantitative discharge device 3 can adopt various known constant speed quantitative conveying methods, including but not limited to impeller feeder, screw conveyor, scraper conveyor and methods with limited opening size.

[0055] The constant speed and quantitative discharge device 3 can adopt an impeller feeder, and the feed port of the impeller feeder is connected to the lower end of the mixing barrel 1 by a known method (such as flange connection), and a known conveying device (such as a chain conveyor belt, etc.) can be placed at the lower end of the discharge port to transport the mixture of slag and reagents to the target site; the discharge rate of the impeller feeder can be adjusted according to the actual production rate.

[0056] The constant speed and quantitative discharge device 3 can adopt screw conveying, and the open end of the screw conveyor is flanged and connected to the lower end of the mixing barrel 1 in a manner not limited to this, and the mixture of slag and reagent is discharged from the screw conveyor; the transport and discharge rate of the screw conveyor is adjusted according to the actual production rate.

[0057] The constant speed and quantitative discharge device 3 can adopt a scraper conveyor. The size of the lower end outlet of the mixing drum 1 matches the width of the scraper conveyor. The scraper conveyor is directly placed at the lower end outlet of the mixing drum 1, so that the mixture of slag and reagents at the outlet of the mixing drum 1 can only be discharged through the scraper conveyor. The transportation rate and discharge rate of the scraper conveyor are regulated according to the actual production rate.

[0058] The constant speed quantitative discharge device 3 can adopt a limited opening size. A device capable of adjusting the opening size is arranged at the lower end of the mixing barrel 1 to adjust the opening size according to the density and production rate of the mixture of slag and reagent.

[0059] The discharge rate of the constant-speed quantitative discharge device 3 depends on the uniformity of the mixing of the slag and the reagent. The main influencing factors include the design form of the upper section 11 of the mixing barrel 1 (such as the pre-mixing blades or spiral propulsion device on the inner side of the barrel wall of the upper section 11 of the mixing barrel 1), the number of layers of the mixing blades, the rotation rate of the mixing blades, the ratio of the forward rotation rate to the reverse rotation rate, the width and angle of the blades, the shape of the ribs on the blades, and the properties of the slag, the properties of the reagent, etc., which generally need to be determined through experiments.

[0060] Drug input can be achieved in the following ways:

[0061] 1) The reagent input device 7 includes a reagent input pipe fixed on the wall of the mixing barrel 1. When the mutual shearing and stirring assembly 2 is a forward rotating blade 21 driven by the rotating shaft 4, and the reverse rotating blade 22 is fixed to the inner side of the wall of the lower section 12 of the stationary mixing barrel 1, the reagent input pipe can be fixed on the wall of the lower section 12 of the mixing barrel 1 and placed on the back of the soil of the topmost reverse rotating blade 22 of the wall; the reagent input pipe can be set on part or all of the blades of this layer, and when the reagent input amount is not satisfied, the reagent input pipe can also be set at other layers of blades; in order to make the input reagent more evenly distributed, different lengths of the reagent input pipes can be used respectively, and the length of each reagent input pipe is determined by factors such as the curing agent mixing ratio specified in the design, the rate of the reagent input by the reagent input pipe, and the amount of slag in the area to be supported, and is generally 10%-90% of the blade length.

[0062] When the medicine is input in powder or paste form, a spiral input method can be adopted to install a spiral conveying blade 72 in each medicine input pipe, and the input rate is determined according to the required medicine input amount, see Figure 6 and Figure 7 When the medicine is introduced in the form of slurry, it can be introduced through each medicine inlet pipe by pumping.

[0063] When using Figure 2 When the mutual shear stirring assembly 2 is shown, that is, the forward rotating blade 21 rotates forwardly with the inner shaft 41, and the reverse rotating blade 22 rotates reversely with the outer shaft 42, and Figure 3 When the forward rotating blade 21 rotates with the rotating shaft 4 and the reverse rotating blade 22 rotates with the lower section 12 of the mixing barrel 1, a set number of stirring blades can be added to the inner wall of the mixing barrel 1 near the bottom surface of the upper section 11 of the mixing barrel 1, and the drug input pipe is fixed on the barrel wall of the mixing barrel 1 and placed on the back of the stirring blades.

[0064] 2) The reagent input device 7 adopts the reagent input method of the existing solidified soil mixer (deep mixer), and inputs from the rotating mixing blade. In the case where the reagent is input in the form of slurry, a slurry delivery pipe is provided inside the inner and outer shafts or the rotating shaft 4, and a grouting port is provided at the intersection of the mixing blade and the inner and outer shaft or the rotating shaft 4 or along the blade, and a grouting pump is used to input the reagent liquid into the soil; generally, a grouting port can be provided on the first layer of mixing blades or on the upper frame 231 of the frame-shaped member 23, and the grouting port can be provided on the back of the blade or behind the rib plate. A grouting port can also be provided on other layers of mixing blades, and a grouting port can also be provided on the reverse rotating blade 22 on the outer shaft.

[0065] 3) Add reagents to the soil input section at the front end of the mixing drum 1: 1 / Use a belt conveyor 10 equipped with a gravity sensor to continuously weigh the dynamic soil weight, and then use an intelligent digital control system to calculate and continuously supply the corresponding amount of reagents based on the weighed soil weight; 2 / When the soil mixed with the reagent enters the mixing drum 1, the soil and the reagent are pre-mixed; 3 / Control the feed rate based on the actual production rate and the degree of mixing uniformity.

[0066] The mixer of the present invention can be used for fine-grained soil residue with a particle size of less than 5 cm, and is particularly suitable for clay soil residue.

[0067] The following is a description of the specific implementation of the technical features of the present invention with reference to several specific embodiments:

[0068] Embodiment 1:

[0069] The physical and mechanical indicators of the slag to be mixed are shown in the following table:

[0070]

[0071] According to the requirements of soil for road engineering, a curing agent needs to be added, and the designed output is 100t / h. The mixing device of the slag soil and the reagent mixture of the present invention is adopted. The diameter of the mixing drum 1 is 2.0m, the axial length of the drum is 4.5m, and the axial inclination angle of the mixing drum 1 to the horizontal plane is 45°.

[0072] like Figure 2 As shown, the mutual shear stirring assembly 2 mainly adopts the structural form of an outer shaft 42 sleeved with an inner shaft 41 and matched with a frame-shaped component 23. The side frame 232 of the frame-shaped component 23 is axially provided with three layers of spaced stirring blades, and each layer of the stirring blade group includes two counter-rotating blades 22 respectively fixed on the side frames 232 of the square frame-shaped frame-shaped component 23. The long axis of the reverse stirring blade 132 is perpendicular to the outer shaft 42 and the inner shaft 41, and the tip / free end of the blade points to the direction of the inner shaft 41; the upper frame 231 and the lower frame 233 of the frame-shaped component 23 have the same axial angle with the mixing drum 1, and the soil facing surface of the side frame 183 is preferably about 105° with the barrel wall of the mixing drum 1. Angle, the upper frame 231, the lower frame 233 and the side frame 232 of the frame-shaped member 23 are in the same plane; the axial spacing between adjacent stirring blade groups arranged on the frame-shaped member 23 is 40cm; the inner shaft 41 is fixedly provided with 4 layers of forward stirring blades 131 on the shaft section outside the outer shaft 42, each layer includes 3 blades, the angle is 120°, the spacing between the uppermost layer of forward rotating blades 21 connected to the inner shaft 41 and the upper frame 231 of the frame-shaped member 23, and the spacing between the lowermost layer of forward rotating blades 21 and the lower frame 233 of the frame-shaped member 23 are both 10cm, and the spacing between each layer of stirring blade groups connected to the inner shaft 41 is 40cm.

[0073] The size of the blade is preferably: 65 cm long, 10 cm wide, and 1.5 cm thick. The short side of the tip / free end of the forward rotating blade 21 forms a clockwise angle of 45° with the axis of the inner shaft 41, and the short side of the reverse rotating blade 22 forms a counterclockwise angle of 45° with the axis of the inner shaft 41. Seven ribs are arranged on the lower surface of each blade, the ribs are 3 cm high, and the angle between the long axis of the ribs and the long axis of the stirring blade is 60°.

[0074] Preferably, a hydraulic motor is used as the first power source 51, and the rotation direction of the outer shaft 42 and the inner shaft 41 is converted by the gear assembly 52, so that the stirring blade groups connected to the inner shaft 41 and the outer shaft 42 respectively make relatively opposite coaxial rotations; preferably, the speed ratio of the inner and outer shafts is set to 0.5, the outer shaft speed is 18r / min, the inner shaft speed is 9r / min, the relative movement speed of the slag in the mixing barrel 1 in the multi-layer stirring blade group area is 0.3m / min, and the stirring times per unit volume is 960r / m.

[0075] The constant speed and quantitative discharge device 3 at the lower end of the mixing drum 1 is preferably connected to an impeller feeder, which is connected to the lower end of the mixing drum 1 through a flange, and the rate of discharging the slag mixture is about 1.7 t / min.

[0076] The curing agent is added to the front end slag input section in the mixing drum 1: the sieved slag passes through the belt conveyor 10 equipped with a weighing sensor. During the transportation of the slag on the belt conveyor 10, the weighing sensor measures the weight of the slag continuously passing through the slag conveyor in each period; the numerical control device calculates the input amount of the curing agent in each period according to the designed curing agent mixing ratio and controls the curing agent input device to continuously supply the corresponding amount of curing agent.

[0077] Embodiment 2:

[0078] The physical and mechanical indicators of the slag to be mixed are shown in the following table:

[0079]

[0080] According to user needs, the design output is 120t / h, and the mixing device of the slag and reagent mixture of the present invention is adopted. The mixing drum 1 has a diameter of 2.5m, an axial length of 5m, and an inclination angle of 30° between the drum axis and the horizontal plane.

[0081] The mutual shear stirring component 2 adopts Figure 3 The form shown is the same as the structure in which the mutual shear stirring assembly 2 in the specific embodiment adopts the forward rotating blade 21 driven by the rotating shaft 4, and the reverse rotating blade 22 is fixed to the inner side of the cylinder wall of the rotatable lower section 12 of the mixing cylinder 1, and the upper section 11 of the mixing cylinder 1 is disconnected from the lower section 12 of the mixing cylinder 1; Figure 8The rotating shaft 4 of the mixing drum 1 is provided with a spiral propulsion blade 45 in the area above the mutual shear stirring assembly 2, i.e., on the upper part of the rotating shaft 4. The spiral propulsion blade 45 is driven by a separate driving device. The slag 3 above the mixing drum 1 is guided downward by the rotation of the spiral propulsion blade 45. The axial distance between the bottom end of the spiral propulsion blade 45 and the boundary between the upper section 11 and the lower section 12 of the mixing drum 1 is 50 cm.

[0082] A layer of blades is arranged on the inner side of the wall of the upper section 11 of the mixing drum 1 at 20 cm axially from the lower end of the spiral propulsion blade 45, the layer having 3 blades, each blade having an angle of 120°, the blade being 115 cm long and 8 cm wide, a spraying hole for injecting the agent is arranged on the back surface of the blade, a grouting pipe is arranged on the back surface of each blade, and 4 spraying ports with a diameter of 2 cm are arranged at equal distances on each grouting pipe; 3 layers of stirring blades are fixedly connected to the rotating shaft 4 within the range of the lower section 11 of the mixing drum 1, each layer having 3 stirring blades, each having an angle of 120°; 3 layers of stirring blades are arranged on the inner side of the wall of the lower section 12 of the mixing drum 1, each layer having 3 stirring blades, each having an angle of 120°; the 3 layers of stirring blades fixed on the inner side of the mixing drum 1 are evenly inserted into the interlayers of the 3 layers of stirring blades on the rotating shaft 4, and the net distance of each layer of stirring blade group is 15 cm.

[0083] The short side of the blade of the rotating shaft 4 forms an angle of 60° counterclockwise with the axis of the rotating shaft 4, and the short side of the blade on the inner side of the cylinder wall of the lower section 12 of the mixing drum 1 forms an angle of 60° clockwise with the axis of the rotating shaft 4. Each blade is fixed with 6 evenly distributed ribs, and the rib height is 2 cm; the inclination angle between the long axis of the rib on the blade of the rotating shaft 4 and the long axis of the blade is 30°, and the inclination angle between the long axis of the rib on the blade on the inner side of the cylinder wall of the lower section 12 of the mixing drum 1 and the long axis of the blade is 150°; the driving device drives the rotating shaft 4 to rotate clockwise, and the driving device outside the mixing drum 1 drives the mixing drum 1 to rotate counterclockwise; the rotation speed of the lower section 12 of the mixing drum 1 is set to 7r / min, the rotation speed of the rotating shaft 4 is set to 16r / min, the relative movement speed of the mixing blade group provided in the mixing drum 1 is 0.2m / min, and the number of stirring times per unit volume is 1035r / m. The lower part of the mixing drum 1 is connected to a scraper conveyor for transporting and discharging the mixed mixture at a constant speed and quantity, with a discharge rate of about 1.96 t / min; the input rate and discharge rate of the spiral propulsion blade 45 of the upper section 11 of the mixing drum 1 are basically coordinated.

[0084] Combination Figure 3 and Figure 8 The production process of slag and reagent mixture has the following steps:

[0085] S1. Use a drum screen 8 to screen out debris larger than 5 cm, and then convey the screened slag to the upper opening of the mixing drum 1 through a belt conveyor 10. During the process, an electronic belt scale is used. The measurement and control device obtains the amount of slag entering the mixing drum 1 according to the conveyor belt transportation speed and monitoring, and then obtains the density of the slag in the lower section 12 of the mixing drum 1 according to the axial movement rate of the slag in the mixing drum 1. The measurement and control device determines the amount of curing agent added according to the design, and uses pumping to transport the curing agent.

[0086] S2. In the initial stage, the constant speed and constant speed quantitative discharge device 3 is closed. The slag is fed into the mixing drum 1 at an output rate corresponding to the output of the slag and curing agent mixture by the constant speed and quantitative discharge device 3, and the blades in the multi-layer mutual shearing section ② are started to rotate at the aforementioned set speed. When the height of the slag exceeds the first layer of blades on the drum wall, the numerical control device controls the screw conveyor to give a given curing amount.

[0087] S3. When the height of the slag input into the mixing drum 1 completely exceeds the mutual shearing and mixing component 2 of the mixing drum 1, and the lowest point of the slag is 50 cm higher than the bottom line of section ①-2, the constant-speed quantitative discharging device 3 is opened to output the mixture of slag and curing agent at a rate given by the design, while ensuring that the input rate of the slag and the output rate of the mixture of slag and curing agent match, and that the lowest point of the slag is 50 cm higher than the bottom line of section ①2. When the output of the mixture of slag and curing agent is greater than the amount of slag in the mixing drum 1 when the constant-speed quantitative discharging device 3 is opened, the mixture of slag and curing agent discharged from the constant-speed quantitative discharging device 3 is a qualified mixture product of slag and curing agent.

[0088] S4. Keep the input rate of the slag into the mixing drum 1 matched with the rate and weight of the slag and curing agent mixture discharged by the constant speed and quantitative discharge device 3, keep the curing agent input stable, and keep the blades in the mutual shear stirring component 2 rotating at the set speed, so as to realize the continuous production of the slag and curing agent mixture.

[0089] Embodiment three:

[0090] The physical and mechanical indicators of the slag to be mixed are shown in the following table:

[0091]

[0092] According to the technical requirements proposed by the manufacturer, the curing agent is evenly mixed into the slag. The curing agent can only be added in the form of powder. The designed output is 100t / h. The mixing device of the slag and reagent mixture of the present invention is used. The diameter of the mixing drum 1 is 1.5m, the axial length of the mixing drum 1 is 4m, and the angle between the axis of the mixing drum 1 and the horizontal plane is 60°.

[0093] The stirring blade group area in the mixing barrel 1 adopts the mixing barrel 1 as a whole and is fixed and does not rotate. The inner wall of the mixing barrel 1 is fixedly connected with 3 layers of stirring blades. Each layer of stirring blades includes 3 blades. The long axis of the blades is perpendicular to the axis of the mixing barrel 1. The tip / free end of the blade points to the rotating shaft 4. The angle between each blade in each layer is 120°. When the blades of the two adjacent layers of stirring blade groups are projected onto the same plane from top view, the adjacent blades are projected at an angle of 60°, and the stirring blades of the spacing layer are arranged at the same angle. The rotating shaft 4 is provided with 4 layers of stirring blade groups in the lower section 12 of the mixing barrel 1. Each layer of stirring blades includes 4 stirring blades. The angle between each stirring blade is 90°. When the blades of the two adjacent layers of stirring blade groups are projected onto the same plane from top view, the adjacent blades are projected at an angle of 45°, and the stirring blades of the spacing layer are arranged at the same angle. The 4 layers of stirring blades fixed on the rotating shaft 4 are evenly inserted into the 3 layers of stirring blades fixed on the inner side of the mixing barrel 1. The net distance between the stirring blades of the adjacent layers is 15 cm.

[0094] The stirring blades on the rotating shaft 4 and the stirring blades on the inner wall of the mixing drum 1 are 65 cm long, 6 cm wide and 2 cm thick; the short side of the blade on the rotating shaft 4 is 45° counterclockwise with the rotating shaft 4, and the short side of the blade on the inner side of the mixing drum 1 is 45° clockwise with the rotating shaft 4; 5 ribs are fixedly set on the 4 layers of stirring blades on the rotating shaft 4, and the ribs are 3 cm high; in the first and third layers of blades, the angle between the long axis of the ribs and the long axis of the blades is 120°; in the second and fourth layers of blades, the angle between the long axis of the ribs and the long axis of the blades is 60°. The mixing drum 1 and the rotating shaft 4 rotate in opposite directions relative to each other. It is preferred to use a motor 7 as a power source to drive the rotating shaft 4 to rotate clockwise, the rotating shaft 4 rotates at a speed of 24 r / min, the axial relative movement speed of the soil in the mixing drum 1 area where the stirring blade group is located is 0.25 m / min, and the number of stirring times per unit volume is 1536 r / m. The lower end of the mixing drum 1 is connected to a constant speed and quantitative discharge device 3 of a screw conveyor, and the discharge rate is 0.60 t / min.

[0095] The medicine input device 7 adopts Figure 6 and Figure 7 The spiral conveying method shown is as follows: four spiral conveying blades 72 with different conveying pipe lengths are used, the spiral conveying is set on the mixing drum 1, the conveying pipe is set on the back soil surface of the first layer of stirring blades counted from the top to the bottom of the lower section 12 of the mixing drum 1, the lengths of the four conveying pipes are 55cm, 42cm, 29cm and 16cm respectively, the feed port, discharge port size, diameter and spiral blade design of the four spiral conveying pipes are the same, the input amount of reagent per unit volume is equal, the spiral speed is determined by calculating the reagent mixing ratio and the volume of slag borne by the input reagent of each input pipe; the external feed tank 71 provides reagents, and the reagent delivery amount is controlled by the CNC platform.

[0096] Embodiment 4:

[0097] The physical and mechanical indicators of the slag to be mixed are shown in the following table:

[0098] Geotechnical classification <![CDATA[Density (g / cm 3 )]]> Moisture content w / % <![CDATA[Liquid limit w L / %]]> <![CDATA[Plastic limit w P / %]]> <![CDATA[Plasticity index I P > Clay 1.64 40 39 22 17

[0099] It is planned to produce fluidized solidified soil products, and the slag is mainly clay. According to the product performance requirements, water, admixtures and curing agents are required to be added. Admixtures and curing agents are added in the form of slurry. The designed output is 80t / h. The mixing drum 1 has a diameter of 1.5m, a length of 5m, and an inclination of 90°.

[0100] The design adopts the inner and outer shafts to be concentric, the auxiliary frame-shaped component 23 and two driving devices to drive respectively, each driving the blades of the corresponding stirring blade layer to rotate in the opposite direction. The outer shaft 42 is provided with 6 layers of stirring blades on the outer peripheral wall, 2 blades in each of the upper three layers, the angle between the blades is 180°, the blades of the two adjacent stirring blade groups are projected onto the same plane when viewed from above, and the blade projections are at an angle of 90°, the blades of the stirring blade groups of the spacing layer are arranged in a consistent manner, and the axial spacing of the stirring blades of each layer is 30cm; 3 blades in each of the lower three layers, the angle between the blades is 120°, the blades of the two adjacent stirring blade groups are projected onto the same plane when viewed from above, and the blades are at an angle of 60°, the blades of the stirring blade groups of the spacing layer are arranged in a consistent manner, and the spacing of the stirring blade groups of each layer is 25cm.

[0101] The bottom of the outer shaft 42 is connected to the frame-shaped member 23, and the side frame 232 of the frame-shaped member 23 is provided with a three-layer stirring blade group, each layer of stirring blades includes 3 blades, and the angle between the blades is 120°. The upper frame and the lower frame 233 of the frame-shaped member 23 are twisted at an angle of 30° in a plane perpendicular to the outer shaft 42, and the long axis of the blade is perpendicular to the axial direction, and the tip / free end of the blade points to the inner shaft 41; the upper and lower frames 233 of the frame-shaped member 23 are perpendicular to the outer shaft 42, and the soil-facing surface of the side frame 232 forms an angle of 150° with the cylinder wall of the mixing cylinder 1; from the top to the bottom, the first layer of stirring blades connected to the frame-shaped member 23 is 30 cm away from the second layer of stirring blades, and the second layer of stirring blades is 30 cm away from the first layer of stirring blades connected to the frame-shaped member 23. The distance between the blade group and the third layer of stirring blade group is 50cm, and the stirring blades of each layer are arranged in a staggered manner; the inner shaft 41 is fixedly connected to 4 layers of stirring blades in the shaft section below the outer shaft 42, each layer includes 4 blades, and the angle of each blade is 90°; the distance between the first layer of stirring blade group connected by the inner shaft 41 and the second layer of stirring blade group is 30cm, the distance between the second layer of stirring blade group and the third layer of stirring blade group is 40cm, and the distance between the third layer of stirring blade group and the fourth layer of stirring blade group is 50cm. The net distance between the uppermost and lowermost stirring blade groups connected by the inner shaft 41 and the upper frame 231 and the lower frame 233 of the frame-shaped component 23 are both 10cm, and the blades of each layer of stirring blade group are arranged in a staggered manner.

[0102] The stirring blade connected to the outer shaft 42 in the upper section 11 is 60 cm long, 6 cm wide and 2 cm thick. From top to bottom, the short sides of the first and third stirring blades form a counterclockwise angle of 45° with the axis of the outer shaft 42, and the short side of the second stirring blade forms a clockwise angle of 45° with the axis of the outer shaft 42; the stirring blades of each layer in the mutual shear stirring assembly 2 are 55 cm long, 8 cm wide and 2 cm thick. The short side of the stirring blade provided on the frame member 23 forms a counterclockwise angle of 60° with the axis of the inner shaft 41, and the stirring blade connected to the inner shaft 41 forms a clockwise angle of 60° with the axis of the inner shaft 41; From top to bottom, four ribs are fixedly arranged on the back surface of the first and second layers of mixing blades connected to the inner shaft 41 and the first layer of mixing blades connected to the frame-shaped component 23. The ribs are 2 cm high, and the inclination angle between the long axis of the ribs on the blades connected to the inner shaft 41 and the long axis of the blades is 120°, and the inclination angle between the long axis of the ribs on the blades connected to the frame-shaped component 23 and the long axis of the blades is 60°. The driving device that controls the rotation of the inner shaft 41 drives the blades connected to the inner shaft 41 to rotate counterclockwise, and the driving device that controls the rotation of the outer shaft 42 drives the blades connected to the frame-shaped component 23 to rotate clockwise.

[0103] The inner shaft speed is set to 42r / min, the outer shaft speed is set to 14r / min, the axial relative movement speed of the soil in the mutual shear mixing assembly 2 is 0.5m / min, and the mixing times per unit volume is 1764r / m. The lower end of the mixing barrel 1 is connected to a valve with a limited opening size as a constant speed and constant speed and constant speed and constant speed and constant discharge device 3.

[0104] Although the embodiments of the present invention are disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A method for mixing a mixture of slag and a reagent, characterized in that: The following steps are involved: A mixing cylinder is placed at an inclination angle α, and a constant speed and quantitative discharge device is provided at its lower opening; The mixing drum is divided into an upper section and a lower section, and a mutual shear stirring assembly is arranged in the lower section of the mixing drum, wherein the mutual shear stirring assembly is a multi-layer stirring blade installed along the axial direction of the mixing drum, and the stirring blades of adjacent layers rotate in opposite directions with the same axis; the slag is input from the upper opening of the mixing drum at a set rate, and the height of the slag is always not lower than the height set in the upper section of the mixing drum, and at the same time, the agent is input into the slag at a set ratio, and the stirring blades of adjacent layers in the mutual shear stirring assembly rotate in opposite directions at a set rotation rate, and at the same time, the constant speed and quantitative discharge device at the lower opening of the mixing drum discharges the mixed slag and agent mixture at a set rate; That is to form the continuous production of the mixture of slag and reagents.

2. A device for implementing the mixing method of a mixture of slag and chemical agent as claimed in claim 1, comprising a mixing drum, a mutual shearing and stirring assembly and a constant speed and quantitative discharge device, characterized in that: The mixing drum is divided into an upper section and a lower section. A mutual shearing stirring assembly is arranged in the lower section of the mixing drum. The mutual shearing stirring assembly includes multiple layers of stirring blades arranged along the axial direction of the mixing drum. The stirring blades in adjacent layers rotate in opposite directions coaxially. The bottom end of the mixing drum is connected to a device for discharging the mixture of slag and reagents at a constant speed and quantity.

3. A mixing device and method for a mixture of slag and chemical according to claim 1 or 2, characterized in that: The mutual shear stirring component is composed of a rotating shaft located at the central axis of the mixing barrel and a plurality of stirring blades arranged along the axial direction; the rotating shaft is a combined structure in which a hollow cylindrical outer shaft is sleeved on an inner shaft coaxially therewith, and the outer shaft and the inner shaft are respectively connected with a plurality of stirring blades, and the stirring blade layer on the inner shaft is arranged alternately with the stirring blade layer connected to the outer shaft, and the stirring blades of adjacent layers are driven to rotate relatively in the opposite direction coaxially by the outer shaft and the inner shaft making relative reverse rotation.

4. A mixing device and method for a mixture of slag and chemical according to claim 1 or 2, characterized in that: The mutual shear stirring component is composed of a rotating shaft located at the center axis of the mixing barrel and multiple layers of stirring blades arranged along the axial direction. The rotating shaft is a hollow cylindrical shaft or a solid shaft. Multiple layers of stirring blades are arranged on the inner side of the lower wall of the mixing barrel. Multiple layers of stirring blades are also arranged on the rotating shaft, and the stirring blades of each layer on the mixing barrel and the stirring blades of each layer on the rotating shaft are arranged alternately; the mixing barrel and the rotating shaft rotate in opposite directions relative to each other, driving the stirring blades of adjacent layers to rotate in opposite directions relative to each other around the axis of the mixing barrel; or one of the mixing barrel and the rotating shaft rotates while the other is stationary, so that the stirring blades of adjacent layers rotate in opposite directions relative to each other with the same axis.

5. A mixing device and method for mixing a mixture of slag and a medicament according to claim 1 or 2, characterized in that: The mixing cylinder is provided with two or more rotation centers, each of which is provided with a set of multi-layer stirring blades installed along the axial direction, and the stirring blades of adjacent layers rotate in opposite directions with the same axis.

6. A mixing device and method for a mixture of slag and chemical according to claim 1 or 2, characterized in that: The number of layers of stirring blades in each group of mutual shear stirring components is 2-18 layers, the number of blades contained in each layer of stirring blades is 2-8, the angle between the long axis of the stirring blade and its rotation axis is in the range of 80°-100°, and the angle between the short side of the stirring blade and the rotation axis is in the range of 45°135°; ribs are arranged on the stirring blades, the number of ribs on each stirring blade is 0-10, the height range of the ribs is 1cm-8cm, the ribs are placed on the soil facing surface when the stirring blades rotate, the angle between the long axis of the ribs and the long axis of the stirring blades is in the range of 20°-160°, and the interlayer spacing range of adjacent layers of stirring blades is 10cm-50cm.

7. A mixing device and method for a mixture of slag and chemical according to claim 1 or 2, characterized in that: The speed range of the inner shaft or outer shaft of the mutual shear stirring component is 10-200r / min, and the speed ratio of the inner shaft to the outer shaft is 0.2-3.0; the speed range of the rotating shaft or the mixing barrel is 0-100r / min.

8. The mixing device and method of a mixture of slag and chemical according to claim 1 or 2, characterized in that: The upper section of the mixing cylinder is provided with spiral propulsion blades and / or pre-mixing blades.

9. The mixing device and method of a mixture of slag and chemical according to claim 1, characterized in that: The inclination angle of the mixing cylinder ranges from 0° to 90°.

10. A mixing device and method for a mixture of slag and chemical according to claim 1 or 2, characterized in that: The wall of the mixing cylinder is provided with a medicine input pipe, and the medicine input pipe can be of different lengths, and the length range is 10%-90% of the length of the stirring blade; when the medicine is input in powder or paste form, a spiral conveying blade can be installed in each medicine input pipe to adopt a spiral input method; when the medicine is input in slurry form, it can be pumped and input through each medicine input pipe.

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