A multi-column and homogeneous layer stacking material homogenization method

Abstract

The present application discloses a multi-column homogeneous stacking material homogenization method, belonging to the technical field of stacking, and comprising the following steps: S1: determining the total stacking height, stacking spacing, and total stacking layers; S2: selecting a gantry stacker, under which a lifting distributor is provided. The distributor is provided with a plurality of discharge ports at equal intervals according to the width of the storage yard, and the material is discharged in an overflow manner through each discharge port of the distributor; S3: The gantry stacker starts stacking from the starting point A and moves to the end point B; then it turns from point B to point A, and the stacker runs in the reverse direction along the initial path to perform stacking and reaches the starting point A; then it repeats in a cycle, thereby forming a number of longitudinal material layers covering the entire length of the storage yard; when the distributor performs the first layer of stacking, the initial position of the distributor is at the lowest point, and after each layer of stacking is completed, the distributor is lifted by a set height, and the stacker drives the distributor to reciprocate and move for feeding until the storage requirement is met.

Description

Technical Field

[0001] This application belongs to the technical field of material stacking in dry-process cement plants, and particularly relates to a multi-column and uniform-layer stacking material homogenization method. Background Art

[0002] The pre-homogenization yard is a place where the raw materials of dry-process cement plants are pre-homogenized during the storage process before grinding. By adopting special stacking and reclaiming methods and facilities, the fluctuation range of the chemical composition of raw materials or fuels is reduced, which is a necessary preparation process for the composition of raw meal or fuel before entering the kiln to tend to be uniform. The pre-homogenization of raw materials is mainly completed by the limestone pre-homogenization yard and the auxiliary raw material and fuel pre-homogenization yard. Its function is to minimize the long-term (counted in days) fluctuation of the chemical composition of batch-incoming raw materials and fuels. During the storage period of raw materials, the discharged composition reaches the predetermined uniformity to meet the requirements of raw meal mill batching control. Therefore, it is required that the fluctuation of the discharged composition of the pre-homogenization yard has the characteristics of short period, high frequency and small amplitude. Generally, pre-homogenization plays an important role in the raw meal homogenization chain. This process is crucial for the production of high-quality cement. It can not only ensure the quality of clinker, increase production and reduce energy consumption, but also stabilize the quality of the cement leaving the factory. However, at the same time, there will be a large amount of dust during the cement pre-homogenization process, such as raw materials like stone powder, dry fine clay, coal powder, cement powder, mineral powder, fly ash, gypsum powder, etc., which can settle under the action of gravity. The internal environment of various yards in cement enterprises is complex, and the problem of dust pollution is particularly prominent. The current stacking methods have problems such as large unorganized dust emissions and difficult dust removal, which pose a serious threat to the production environment, the health of employees and the air quality of the surrounding area.

[0003] The raw materials of dry-process cement plants are all granular solid materials, which are different from the liquid raw materials used in general chemical industries and are very difficult to homogenize themselves during transportation and storage. Therefore, the stability of their chemical composition is much worse than that of the latter. Many enterprises with uniform and stable cement quality attach great importance to the pre-homogenization of raw materials. Therefore, cement plants have been looking for the optimal method to homogenize the composition of cement raw materials.

[0004] The traditional closed long-type pre-homogenization yard is single-line stacking. Due to the restriction of the span of the grid and the reclaiming machine steel beam, to achieve the specified effective storage capacity, only the length of the yard can be increased. However, restricted by the total layout length, it is difficult to meet the storage capacity requirements by simply increasing the length.

[0005] The equipment of traditional stockpiling methods is relatively large in size, which causes the structure of the storage yard workshop to be relatively large in order to accommodate the equipment. On the one hand, it results in high construction costs for the storage yard. On the other hand, the feeding height of the equipment limits the volume of the stockpile, leading to the phenomenon of large storage yards with small stockpiles, and the space of the storage yard cannot be fully utilized, with only a small part used for stockpiling. Moreover, a single stockpiling equipment has only one discharging point, corresponding to only one stockpile that can be stored at the same time. Not only is the feeding speed slow, but also the stockpiling method is single, with low stockpiling efficiency and mediocre homogenization effect.

[0006] The homogenization effect depends on the stockpiling and reclaiming methods. Currently, traditional stockpiling methods include the herringbone stockpiling method, the wavy method, the horizontal layer method, etc. These methods all belong to single-point stockpiling. This single-point feeding method can always only stockpile at one point, and the stockpiling speed is very slow. The overall cross-section of the stockpile formed by stockpiling at one point is always a triangle. This triangular structure is prone to causing segregation of the material. Due to the influence of the natural angle of repose of the material, etc., the higher the layer, the smaller the feeding area and the thinner the layer, and the relatively poor homogenization effect. And materials with relatively large particle sizes will preferentially pile up under the action of gravity to the lower part of the layer, resulting in uneven stockpiling layers and uneven layer thicknesses, which are extremely likely to lead to unstable material composition. Generally, the more the number of stockpiling layers, the smaller the standard deviation and the better the homogenization effect. Therefore, this single-point stockpiling method urgently needs to be improved. Summary of the Invention

[0007] The purpose of this application is to disclose a multi-column and uniform-layer stacking material homogenization method to overcome the problems of the prior art. It adopts a different long-shaped pre-homogenization storage yard that simultaneously increases the cross-sectional area and length of the stockpiling yard. When stockpiling, the number of discharging points is increased, and multiple points stockpile simultaneously. The dropping points during stockpiling are kept on the same straight line, making the stockpiling method become multi-column type, which can significantly improve the material stacking efficiency.

[0008] The purpose of this application is achieved through the following technical solutions:

[0009] A multi-column and uniform-layer stacking material homogenization method, the multi-column and uniform-layer stacking material homogenization method includes the following steps:

[0010] S1: Based on the actual conditions of the storage yard, the variety of materials, the density of materials, the angle of repose of materials, and the required storage volume of a single pile, determine the total stockpiling height, the stockpiling spacing, and the total number of stockpiling layers;

[0011] S2: Select a gantry stacker. An elevating distributor is arranged under the gantry stacker. The distributor is provided with a number of discharging ports at equal intervals according to the width of the storage yard. The materials are discharged in an overflow manner through each discharging port of the distributor. Among them, the total stockpiling height is set as the highest point of the distributor, and the spacing between each discharging port of the distributor is set as the stockpile spacing;

[0012] S3: Determine the traveling path of the gantry reclaimer. In the preset stacking area, start stacking from the starting point A and move to the ending point B to form several side-by-side first-layer stockpiles; then turn from point B to point A, and the reclaimer runs in reverse along the original path for stacking and reaches the original starting point A to form the second-layer stockpile; then repeat the stacking operation in a cycle to form several longitudinal stockpile layers covering the entire length of the yard.

[0013] Moreover, when conducting the first-layer stacking, the initial position of the spreader is at the lowest point, and after completing each layer of stacking, the spreader is lifted by a set height, and the reclaimer drives the spreader to reciprocate and move for spreading until the storage requirement is met at a preset speed.

[0014] According to a preferred embodiment, step S1 includes:

[0015] In the preset stacking area, let the width of the yard be Y, the length be X, and the stacking height be H.

[0016] The discharge points are evenly distributed in the width direction of the yard, and the number is set to n. Each discharge point is marked as Y1~Yn.

[0017] When the entire stockpile is stacked, the spacing between each column of stockpiles is W, and the calculation formula is: W = Y / n.

[0018] The width of the discharge opening is set to B, the height of the initially discharged stockpile is h1; the total number of stacking layers N is set.

[0019] Determine the angle of repose α and the bulk density γ of the material.

[0020] According to a preferred embodiment, the total number of stacking layers N is greater than 400.

[0021] According to a preferred embodiment, in step S3, before stacking, use EDEM to simulate and analyze the stacking process, simulate the material stacking situation, and obtain the stacking speed of each layer at different stacking heights through model calculation to make the thickness of each layer of the stockpile equal.

[0022] According to a preferred embodiment, the thickness δ of the stockpile above the second layer is δ=(H - h1) / N, that is, the height by which the spreader is lifted after each layer of spreading is δ.

[0023] According to a preferred embodiment, the calculation process of the stacking speed of each layer at different stacking heights includes:

[0024] S31: Calculate the widths of each layer of the stockpile. Let the width of each column of the first layer Z1 be w1, the width of each column of the second layer Z2 be w2, the width of each column of the third layer Z3 be w3, the width of each column of the fourth layer Z4 be w4, and so on until the width of each column of the x-th layer Zx is equal to the overall spacing W of the stockpile. For the subsequent top covering layer, the width of each column is W;

[0025] S32: Based on the widths of each layer of the stockpile obtained in step S31, calculate the cross-sectional areas of each layer of the column stockpile. The cross-sectional area of each column of the first layer Z1 is S1, the cross-sectional area of each column of the second layer Z2 is S2, the cross-sectional area of each column of the third layer Z3 is S3, the cross-sectional area of each column of the fourth layer Z4 is S4, the cross-sectional area of each column of the x-th layer Zx is Sx, and the cross-sectional area of each layer after the x-th layer Zx is the same, which is Sx;

[0026] S33: Based on the cross-sectional areas of each layer of the column stockpile obtained in step S32, calculate the stockpiling quantities of each layer of the single-column stockpile. The stockpiling quantity of the single-column stockpile of the first layer is Q1, the stockpiling quantity of the single-column stockpile of the second layer is Q2, the stockpiling quantity of the single-column stockpile of the third layer is Q3, the stockpiling quantity of the single-column stockpile of the fourth layer is Q4, the stockpiling quantity of the single-column stockpile of the x-th layer is Qx, and the stockpiling quantity of the single-column stockpile of each layer after the x-th layer Zx is Qx;

[0027] S34: Based on the total stockpiling quantity Q of the stacker, the number of discharge points or columns n, and the stockpiling quantities of each layer of the single-column stockpile, calculate the stockpiling speeds of each layer. The stockpiling speed of the first layer is defined as V1, the stockpiling speed of the second layer is defined as V2, the stockpiling speed of the third layer is defined as V3, the stockpiling speed of the fourth layer is defined as V4, the stockpiling speed of the x-th layer is defined as V x , and the stockpiling speed of each layer after the x-th layer Zx is V x .

[0028] According to a preferred embodiment, in step S31,

[0029] The width of each column of the first layer Z1 is w1, and w1 = B + 2 * h1 / tan(α);

[0030] The width of each column of the second layer Z2 is w2, and w2 = B + 2 * (h1 + 1 * δ) / tan(α);

[0031] The width of each column of the third layer Z3 is w3, and w3 = B + 2 * (h1 + 2 * δ) / tan(α);

[0032] The width of each column of the fourth layer Z4 is w4, and w4 = B + 2 * (h1 + 3 * δ) / tan(α);

[0033] The stacking width of each column of materials in the x-th layer Zx is wx, and wx = W.

[0034] According to a preferred embodiment, in step S32,

[0035] Then the cross-sectional area of the material stack of each column in the first layer Z1 is S1 = (B + w1) * h1 / 2;

[0036] Then the cross-sectional area of the material stack of each column in the second layer Z2 is S2 = (B + w2) * δ / 2 - S1;

[0037] Then the cross-sectional area of the material stack of each column in the third layer Z3 is S3 = (B + w3) * δ / 2 - S2;

[0038] Then the cross-sectional area of the material stack of each column in the fourth layer Z4 is S4 = (B + w4) * δ / 2 - S3;

[0039] Then the cross-sectional area of the material stack of each column in the x-th layer Zx is Sx = (B + wx) * δ / 2 - S x-1 .

[0040] According to a preferred embodiment, in step S33,

[0041] The stacking quantity of a single-column material stack in the first layer is Q1, and Q1 = S1 * X * γ;

[0042] The stacking quantity of a single-column material stack in the second layer is Q2, and Q2 = S2 * X * γ;

[0043] The stacking quantity of a single-column material stack in the third layer is Q3, and Q3 = S3 * X * γ;

[0044] The stacking quantity of a single-column material stack in the fourth layer is Q4, and Q4 = S4 * X * γ;

[0045] The stacking quantity of a single-column material stack in the x-th layer is Qx, and Qx = Sx * X * γ.

[0046] According to a preferred embodiment, in step S34,

[0047] If the stacking speed in the first layer is V1, then V1 = Q / n / (60 * Q1);

[0048] If the stacking speed in the second layer is V2, then V2 = Q / n / (60 * Q2);

[0049] If the stacking speed in the third layer is V3, then V3 = Q / n / (60 * Q3);

[0050] If the stacking speed in the fourth layer is V4, then V4 = Q / n / (60 * Q4);

[0051] The stacking speed in the x-th layer is Vx , then Vx = Q / n / (60 * Qx).

[0052] The main solution of the present application and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in the present application. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present application, and all of them are the technical solutions to be protected in the present application, and will not be enumerated here.

[0053] Advantages of the present application:

[0054] 1. Through a new material stacking homogenization method, the present application adopts a different long-shaped pre-homogenization yard that increases both the cross-sectional area and the length of the yard. When stacking materials, the number of discharge points is increased, and multiple points stack materials simultaneously. The dropping points during stacking are kept on the same straight line, making the stacking method multi-columnar, which can significantly improve the material stacking efficiency.

[0055] 2. Overflow type discharging, with seamless connection between the discharge port and the material pile. Without the effect of height difference, the overall dust suppression and ash reduction effect of the yard is excellent;

[0056] 3. The discharge points are arranged in an array and evenly on the cross-section of the yard, realizing simultaneous discharging at multiple points. Within a limited site, multiple material piles are formed synchronously. The filling rate of the material piles is increased by at least 8 times compared with the traditional single-point stacking method. At the same time, the loading and unloading capacity is improved, and the space utilization rate is increased by 4 times, effectively improving the utilization rate of the material yard.

[0057] 4. Compared with the traditional herringbone stacking, the current horizontal cross-section of the material pile is a long rectangle with the same size (the herringbone one gradually changes from large to small). When laying each layer of fabric, a whole surface is formed among them. It can truly achieve uniform thin-layer stacking, forming a material pile with a consistent aspect ratio in multiple layers of stacked paving layers. The material distribution is more uniform, the intercepted material layer during material taking is uniform, which can reduce quality fluctuations and has strong adaptability to materials.

[0058] 5. Using a three-dimensional model algorithm to perform three-dimensional modeling on the material pile, simulating the material stacking before stacking. Through intelligent regulation of the model, and supplemented by a variable frequency speed regulation method to control the walking speed of the spreader, more quickly and accurately confirm the number of stacking layers and speed, and feedback to the automatic control system to correct the operation of equipment such as the spreader in real time, with precise control, reducing deviations, making the thickness of each layer of the material layer uniform, reducing the phenomenon of material particle segregation, improving the homogenization ratio, achieving a better mixing effect, greatly improving the stacking efficiency, and improving the homogenization effect.

[0059] 6. Through the design technical method of determining the total number of layers first and then the stacking thickness, it is ensured that when stacking materials, the material pile is composed of as many mutually parallel and vertically overlapping material layers with the same thickness as possible. Description of the Drawings

[0060] Figure 1 It is a schematic diagram of the process of filling the material of this application in the distributor;

[0061] Figure 2 It is a schematic diagram of the stacking and walking path of the distributor of this application in the horizontal plane;

[0062] Figure 3 It is a schematic diagram of the stacking and walking path of the distributor of this application in a three-dimensional coordinate system;

[0063] Figure 4 It is a schematic diagram of the cross-section of the material pile of this application in the vertical direction;

[0064] Figure 5 It is an enlarged schematic diagram of the material pile of this application. Detailed implementation manners

[0065] The following uses specific specific examples to illustrate the implementation manners of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0066] It should be noted that: Similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0067] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying 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 of this application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0068] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0069] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0070] In addition, it should be pointed out in the present application that in the present application, if the specific structures, connection relationships, position relationships, power source relationships, etc. involved are not specifically written, the structures, connection relationships, position relationships, power source relationships, etc. involved in the present application are all those that can be known by those skilled in the art on the basis of the prior art without creative labor.

[0071] Embodiment 1

[0072] The present application discloses a multi-column and homogeneous layer stacking material homogenization method, and the multi-column and homogeneous layer stacking material homogenization method includes the following steps.

[0073] Step S1: Based on the actual conditions of the storage yard, the variety of the material, the density of the material, the angle of repose of the material, and the required storage capacity of a single pile, determine the total stacking height, the stacking interval, and the total number of stacking layers.

[0074] Preferably, in the preset stacking area, let the width of the storage yard be Y, the length be X, and the stacking height be H; the unloading points are evenly distributed in the width direction of the storage yard, and the number is set to n. Each unloading point is marked as Y1~Yn; when the whole pile of materials is stacked, the interval between each column of piles is W, and the calculation formula is: W = Y / n. The width of the unloading port is set to B, and the height of the pile at the initial unloading is h1; the total number of stacking layers N is set; the angle of repose α and the bulk density γ of the material are determined.

[0075] Preferably, the total number of stacking layers N is greater than 400 to reduce the standard deviation of the material composition on the cross-section of the pile and improve the homogenization system.

[0076] Step S2: Select a gantry stacker, and an elevating distributor is arranged under the gantry stacker. As Figure 1 shown, the distributor is provided with a number of unloading ports at equal intervals according to the width of the storage yard, and the materials are discharged in an overflow manner through each unloading port of the distributor. Among them, the total stacking height is set to the highest point of the distributor, and the interval between each unloading port of the distributor is set to the stacking interval.

[0077] Preferably, the material first passes through the reciprocating belt and then fills the beam stacker, and the lifting distributor can start feeding from the ground to keep the material full. In the overflow unloading process, each unloading port is seamlessly connected with the material pile, and the effect of no drop makes the overall dust suppression and ash reduction effect of the yard excellent.

[0078] The beam stacker is equipped with two speed-regulating motors, one of which, M1, is used to drive the beam stacker to move quickly, and the other, M2, is used to slowly raise and lower the distributor. The variable frequency speed-regulating motor drive method allows the stacker to obtain different vehicle speeds. The walking speed of the stacker can determine the amount of material and the thickness of the material per unit length. The number of layers set according to demand can be used to calculate the required thickness of the material, and the travel speed of M1 can be calculated based on the material conveying capacity and bulk density. In order to ensure that the space between the discharge port and the material is filled fully, the M2 motor action time is commanded according to the previously calculated material layer thickness, and the height of the distributor is adjusted.

[0079] Step S3: Determine the walking path of the beam stacker, in the preset stacking area, such as Figure 2 and Figure 3 As shown, the stacking starts from the starting point A and moves to the end point B, forming several side-by-side first-layer material piles; then it turns from point B to point A, and the stacker runs in the opposite direction along the initial path to stack materials and reaches the original starting point A to form a second-layer material pile; then the stacking operation is repeated in a cycle to form several longitudinal material layers covering the entire length of the yard.

[0080] Specifically, the unloading points evenly distributed in the Y direction move at a uniform speed along the X direction. The moving direction can be divided into X1, X2, X3..., Xn moving points. When the distributor moves to Xn, which is the end point B, the first layer of material pile is formed.

[0081] Preferably, when the distributor is stacking the first layer of materials, the initial position of the distributor is at the lowest point, and after each layer of materials is completed, the distributor is raised to a set height, and the stacking machine drives the distributor to move back and forth at a preset speed to distribute materials until the storage requirement is reached.

[0082] Among them, the thickness of the pile above the second layer is δ=(H- h1) / N, that is, the height to which the distributor is lifted after each layer of distribution is δ.

[0083] Specifically, according to the starting and ending coordinates of the stockpiling planned by the process personnel, after the system confirms safety, it issues commands to the corresponding PLC (Programmable Logic Controller) for control and operation. After receiving the stockpiling command, the PLC of the gantry stacker moves the gantry stacker to the target position, lowers the distributor to the specified height, and then performs the stockpiling operation according to the established path rules. According to the set positioning data, the deceleration position and lifting position of the stacker are automatically calculated. After reaching the end position of the preset layer, the distributor raises the height and then stockpiles towards the starting point. In the automatic cycle mode, the stockpiling operation is repeated like this. When the height of the stockpile reaches the predetermined height, the operation stops until the current operation is completed;

[0084] In step S3, before stockpiling, EDEM is used to simulate and analyze the stockpiling process, simulate the material accumulation situation, and obtain the stockpiling speed of each layer at different stockpiling heights through model calculation, so that each layer of the stockpile has the same thickness.

[0085] Specifically, in the process of using EDEM to simulate and analyze the stockpiling process, the calculation process of the stockpiling speed of each layer at different stockpiling heights includes the following steps.

[0086] Step S31: Calculate the stacking width of each layer of the stockpile. Let the width of each column of the first layer Z1 be w1, the width of each column of the second layer Z2 be w2, the width of each column of the third layer Z3 be w3, the width of each column of the fourth layer Z4 be w4, until the width of each column of the xth layer Zx is equal to the overall spacing W of the stockpile, and the width of each column of the subsequent top covering layer is W.

[0087] In step S31, the stacking width of each column of the first layer Z1 is w1, w1 = B + 2 * h1 / tan(α); the stacking width of each column of the second layer Z2 is w2, w2 = B + 2 * (h1 + 1 * δ) / tan(α); the stacking width of each column of the third layer Z3 is w3, w3 = B + 2 * (h1 + 2 * δ) / tan(α); the stacking width of each column of the fourth layer Z4 is w4, w4 = B + 2 * (h1 + 3 * δ) / tan(α); the stacking width of each column of the xth layer Zx is wx, wx = W.

[0088] Compared with the traditional herringbone stockpiling, the current horizontal cross-section of the stockpile is a long rectangle with the same size (the herringbone one gradually changes from large to small). When distributing materials on each layer after the xth layer, a whole surface is formed between each other, which can truly achieve uniform thin-layer stacking, form a stockpile with a consistent aspect ratio in multiple layers of stacked material layers, the material distribution is more uniform, the intercepted material layers are uniform when taking materials, reducing quality fluctuations, and having strong adaptability to materials.

[0089] Step S32: Based on the widths of each layer of the stockpile obtained in Step S31, calculate the cross-sectional area of the column stockpile for each layer of the stockpile. The cross-sectional area of the stockpile for each column in the first layer Z1 is S1, the cross-sectional area of the stockpile for each column in the second layer Z2 is S2, the cross-sectional area of the stockpile for each column in the third layer Z3 is S3, the cross-sectional area of the stockpile for each column in the fourth layer Z4 is S4, the cross-sectional area of the stockpile for each column in the x-th layer Zx is Sx, and the cross-sectional area of the stockpile for each layer after the x-th layer Zx is the same, all being Sx.

[0090] In Step S32, the cross-sectional area of the stockpile for each column in the first layer Z1 is S1 = (B + w1) * h1 / 2; then the cross-sectional area of the stockpile for each column in the second layer Z2 is S2 = (B + w2) * δ / 2 - S1; then the cross-sectional area of the stockpile for each column in the third layer Z3 is S3 = (B + w3) * δ / 2 - S2; then the cross-sectional area of the stockpile for each column in the fourth layer Z4 is S4 = (B + w4) * δ / 2 - S3; then the cross-sectional area of the stockpile for each column in the x-th layer Zx is Sx = (B + wx) * δ / 2 - S x-1 。

[0091] S33: Based on the cross-sectional areas of the column stockpiles for each layer obtained in Step S32, calculate the stockpiling quantity of a single-column stockpile for each layer. The stockpiling quantity of a single-column stockpile in the first layer is Q1, the stockpiling quantity of a single-column stockpile in the second layer is Q2, the stockpiling quantity of a single-column stockpile in the third layer is Q3, the stockpiling quantity of a single-column stockpile in the fourth layer is Q4, the stockpiling quantity of a single-column stockpile in the x-th layer is Qx, and the stockpiling quantity of a single-column stockpile for each layer after the x-th layer Zx is Qx.

[0092] In Step S33, the stockpiling quantity of a single-column stockpile in the first layer is Q1, Q1 = S1 * X * γ; the stockpiling quantity of a single-column stockpile in the second layer is Q2, Q2 = S2 * X * γ; the stockpiling quantity of a single-column stockpile in the third layer is Q3, Q3 = S3 * X * γ; the stockpiling quantity of a single-column stockpile in the fourth layer is Q4, Q4 = S4 * X * γ; the stockpiling quantity of a single-column stockpile in the x-th layer is Qx, Qx = Sx * X * γ.

[0093] Step S34: Based on the total stockpiling quantity Q of the stacker, the number or number of columns n of the discharge points, and the stockpiling quantity of a single-column stockpile for each layer, calculate the stockpiling speed for each layer. The stockpiling speed in the first layer is defined as V1, the stockpiling speed in the second layer is defined as V2, the stockpiling speed in the third layer is defined as V3, the stockpiling speed in the fourth layer is defined as V4, the stockpiling speed in the x-th layer is defined as V x and the stockpiling speed for each layer after the x-th layer Zx is V x 。

[0094] In step S34, if the stacking speed of the first layer is V1, then V1 = Q / n / (60 * Q1); if the stacking speed of the second layer is V2, then V2 = Q / n / (60 * Q2); if the stacking speed of the third layer is V3, then V3 = Q / n / (60 * Q3); if the stacking speed of the fourth layer is V4, then V4 = Q / n / (60 * Q4); if the stacking speed of the xth layer is V x , then Vx = Q / n / (60 * Qx).

[0095] During the simulation and analysis of the stacking process using EDEM, by means of a parametric model, the total number of stacking layers N can be adjusted to quickly obtain the stacking speed of each layer and each column at different thicknesses. Using the discrete element simulation software EDEM to simulate the material conveying and stacking process, simulate its conveying and stacking height process, analyze its stacking efficiency and effect, the stacking speed of each layer can be quickly selected when there are different total numbers of stacking layers N and different numbers of columns for stacking. Combining traditional empirical design and modern three-dimensional design, simulating and verifying the stacking can ensure the selection of the optimal stacking method.

[0096] This application has at least the following beneficial effects compared to the prior application patent: A multi-linear homogeneous layer continuous cyclic stacking and homogenization method (application number: CN202410452857.0):

[0097] 1. The stacking path of the prior application patent is that a stacking point distributes materials in the stacking area. Starting from point A as the starting point of the stacking operation, when the stacker reaches the stacking operation end point B, a single-column first-layer material stack is formed. Then the original end point B is switched to the starting point, and the stacker runs in the reverse direction along the original path and continues to stack until it reaches the original starting point A, forming the second-layer material stack. Then the stacking operation is repeated continuously without interruption in the middle.

[0098] However, the stacking walking path of the method of this application adopts multi-column distribution with simultaneous addition of unloading points, and multiple unloading points move simultaneously: in the stacking area, starting from the starting point A of the stacking operation, stacking continues until the height of the material stack reaches the stacking operation turning point B, forming the first-layer material stack. Then the original turning point B is switched to the starting point, and the stacker runs in the reverse direction along the original path and continues to stack until it reaches the original starting point A, forming the second-layer material stack. Then the stacking operation is repeated continuously without interruption in the middle. Compared with the stacking form of the prior application patent, the efficiency of this invention is lower, the path is complex, the travel distance is longer, and it is time-consuming and laborious.

[0099] Compared with the prior patent application, the method of this application adds discharge points, changing the original single-discharge-point stacking into multi-point simultaneous stacking, and making the stacking method multi-columnar. This method cannot be achieved in the prior patent application because the prior art uses a multi-point distributor. Combining this distributor with the method of the present invention can maximize the advantages of the equipment. Since it is multi-column simultaneous stacking, it solves the problem of the increased walking distance of the stacker caused by column-by-column stacking, significantly reduces the stacking distance, saves stacking time, and can significantly improve the stacking efficiency.

[0100] 2. In the prior patent application, since the walking path of the stockpile is to complete one column before stacking the adjacent column, the cross-section of the stockpile is nested and stacked with each other. And so on, when stacking the same layer of materials, when stacking after one column is completed, due to the segregation effect of the materials, the composition of the adjacent stockpiles is not uniform, resulting in the adjacent columns in each layer not being completely fused together.

[0101] Furthermore, although the prior patent application also controls the thickness of each layer to be consistent, since each layer of the material layer is formed by stacking column by column instead of multi-column simultaneous stacking, it is very difficult to accurately control the actual thickness uniformity of each layer, which makes it easy for the stacking thickness to deviate.

[0102] Furthermore, compared with the traditional herringbone stacking, the horizontal cross-section of the stockpile of this application is a long rectangle with the same size. When laying each layer of materials, a whole surface is formed between each other, which can truly achieve uniform thin-layer stacking, forming a stockpile with a consistent aspect ratio of length and width for multiple layers of stacked material layers. The material distribution is more uniform, the intercepted material layers are uniform when taking materials, which can reduce quality fluctuations and has strong adaptability to materials.

[0103] 3. The stacking method of the prior patent application has one stacking point and the stacking height remains unchanged. The material falls directly from a fixed height. This method has a large stacking drop, serious dust-raising problems, and poor control of dust pollution. The prior art method uses overflow discharge, with a seamless connection between the discharge port and the stockpile. The absence of a drop makes the overall dust suppression and ash reduction effect of the yard excellent.

[0104] 4. The stacking method provided by the prior patent application still relies on existing stacking equipment and cannot control the size and shape of the stacker equipment. This also leads to the fact that the workshop still has to adapt to the size of the stacker, so that the yard space still cannot be fully utilized. This technical method is realized by using a beam conveyor and a multi-discharge-port distributor. The biggest advantage of the beam conveyor is that it can be arranged relying on the height of the stack shed roof. Coupled with the fact that the distributor is telescopic, a certain space occupied by the equipment can be reduced while making full use of the height space in the yard as a stacking area, which also improves the loading and unloading capacity and effectively improves the yard utilization rate compared with the original technical method.

[0105] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-column and homogeneous layer stacking material homogenization method, characterized in that, The method for homogenizing multi-row uniform layer stacked materials comprises the following steps: S1: Based on the actual conditions of the stockpile, the type of materials, the density of the materials, the angle of repose of the materials, and the required storage capacity of a single pile, determine the total stockpile height, stockpile spacing, and total number of stockpile layers; in the preset stockpile area, let the stockpile width be Y, and the unloading points be evenly distributed in the stockpile width direction, the number is set to n, and each unloading point is marked as Y1~Yn; when the stockpile is stacked as a whole, the spacing between each row of the stockpile is W, and the calculation formula is: W=Y / n; S2: Select a beam stacker. A lifting distributor is provided under the beam stacker. The distributor is provided with a number of discharge ports at equal intervals according to the width of the stockyard. The material is discharged in an overflow manner through each discharge port of the distributor. The total stockpile height is set to the highest point of the distributor, and the spacing between each discharge port of the distributor is set to the stockpile spacing. S3: Determine the travel path of the beam stacker, start stacking materials from the starting point A in the preset stacking area and move to the end point B to form several first-layer material piles in parallel; then turn from point B to point A, the stacker runs in the reverse direction along the initial path to stack materials and arrive at the original starting point A to form a second-layer material pile; then the stacking operation is repeated in a cycle to form several longitudinal material layers covering the entire length of the yard; Moreover, when the distributor is stacking the first layer of materials, the initial position of the distributor is at the lowest point, and after each layer of materials is completed, the distributor is raised to a set height, and the stacker drives the distributor to move back and forth at a preset speed until the storage requirement is reached; Calculate the width of each layer of the pile, and set the width of each column of the first layer Z1 to w1, the width of each column of the second layer Z2 to w2, the width of each column of the third layer Z3 to w3, and the width of each column of the fourth layer Z4 to w4, until the width of each column of the x-th layer Zx is wx and is equal to the overall spacing W of the pile, and the width of each column of the subsequent top covering layer is W.

2. The multi-column and homogeneous layer stacking material homogenization method according to claim 1, characterized in that, Step S1 includes: In the preset stockpile area, let the stockpile length be X and the stockpile height be H; The width of the discharge port is set to B, the initial discharge material pile height is h1; the total number of pile layers N is set; Determine the material's angle of repose α and bulk density γ.

3. The multi-column and homogeneous layer stacking material homogenization method according to claim 2, characterized in that The total number of stacking layers N is greater than 400.

4. The multi-column and homogeneous layer stacking material homogenization method according to claim 2, wherein In step S3, before stacking, EDEM is used to simulate and analyze the stacking process, simulate the material stacking situation, and obtain the stacking speed of each layer at different stacking heights through model calculation, so that each layer of the material stack has the same thickness.

5. The multi-column and homogeneous layer stacking material homogenization method according to claim 4, characterized in that, The thickness of the pile above the second layer is δ=(H- h1) / N, that is, the height to which the distributor is lifted after each layer of distribution is δ.

6. The multi-column and homogeneous layer stacking material homogenization method according to claim 5, characterized in that, The calculation process of the stacking speed of each layer at different stacking heights includes: S31: Obtain the width of each layer of the pile; S32: Based on the width of each layer of the pile obtained in step S31, the cross-sectional area of each layer of the pile is calculated. The cross-sectional area of each column of the first layer Z1 is S1, the cross-sectional area of each column of the second layer Z2 is S2, the cross-sectional area of each column of the third layer Z3 is S3, the cross-sectional area of each column of the fourth layer Z4 is S4, the cross-sectional area of each column of the x-th layer Zx is Sx, and the cross-sectional area of each layer of the pile after the x-th layer Zx is the same as Sx; S33: Based on the cross-sectional areas of each layer of column stockpiles obtained in step S32, calculate the stockpiling volume of a single column of the stockpile for each layer. The stockpiling volume of a single column of the first-layer stockpile is Q1, the stockpiling volume of a single column of the second-layer stockpile is Q2, the stockpiling volume of a single column of the third-layer stockpile is Q3, the stockpiling volume of a single column of the fourth-layer stockpile is Q4, the stockpiling volume of a single column of the x-layer stockpile is Qx, and the stockpiling volume of a single column of each layer of the stockpile after the x-th layer Zx is Qx; S34: Calculate the stacking speed of each layer based on the total stacking quantity Q of the stacker, the number or columns n of discharge points, and the stacking quantity of a single-column stockpile in each layer of the stockpile. The stacking speed of the first layer is defined as V1, the stacking speed of the second layer is defined as V2, the stacking speed of the third layer is defined as V3, the stacking speed of the fourth layer is defined as V4, and the stacking speed of the xth layer is defined as V x , and the stacking speed of each layer after the xth layer Zx is V x .

7. The multi-column and homogeneous layer stacking material homogenization method according to claim 6, characterized in that, In step S31, The stacking width of each column of the first layer Z1 is w1, and w1 = B + 2 * h1 / tan(α); The stacking width of each column of the second layer Z2 is w2, and w2 = B + 2 * (h1 + 1 * δ) / tan(α); The stacking width of each column of the third layer Z3 is w3, and w3 = B + 2 * (h1 + 2 * δ) / tan(α); The stacking width of each column of the fourth layer Z4 is w4, and w4 = B + 2 * (h1 + 3 * δ) / tan(α); The stacking width of each column of the x-th layer Zx is wx, and wx = W.

8. The multi-column and homogeneous layer stacking material homogenization method according to claim 6, characterized in that In step S32, Then the cross-sectional area of the stockpile of each column of the first layer Z1 is S1 = (B + w1) * h1 / 2; Then the cross-sectional area of the stockpile of each column of the second layer Z2 is S2 = (B + w2) * δ / 2 - S1; Then the cross-sectional area of the stockpile of each column of the third layer Z3 is S3 = (B + w3) * δ / 2 - S2; Then the cross-sectional area of the stockpile of each column of the fourth layer Z4 is S4 = (B + w4) * δ / 2 - S3; Then the cross-sectional area of the stockpile for each column of the x-th layer Zx is Sx = (B + wx) * δ / 2 - S x-1 .

9. The multi-column and homogeneous layer stacking material homogenization method according to claim 6, characterized in that In step S33, The stockpiling volume of a single column of the first-layer stockpile is Q1, and Q1 = S1 * X * γ; The stockpiling volume of a single column of the second-layer stockpile is Q2, and Q2 = S2 * X * γ; The stockpiling volume of a single column of the third-layer stockpile is Q3, and Q3 = S3 * X * γ; The stockpiling volume of a single column of the fourth-layer stockpile is Q4, and Q4 = S4 * X * γ; The stockpiling volume of a single column of the x-layer stockpile is Qx, and Qx = Sx * X * γ.

10. The multi-column and homogeneous-layer stacking material homogenization method according to claim 6, characterized in that In step S34, The stacking speed of the first layer is V1, then V1 = Q / n / (60 * Q1); The stacking speed of the second layer is V2, then V2 = Q / n / (60 * Q2); The stacking speed of the third layer is V3, then V3 = Q / n / (60 * Q3); The stacking speed of the fourth layer is V4, then V4 = Q / n / (60 * Q4); The stacking speed of the x-th layer is V x , then Vx = Q / n / (60 * Qx).

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