Device and method for removing steam of deep well cast aluminum bar

Abstract

The invention discloses a deep well cast aluminum bar steam removing device and method, and relates to the technical field of deep well cast aluminum alloy DC bars, the deep well cast aluminum alloy DC bar steam removing device comprises a cast well body, a cast well steam retention space is arranged at the inner bottom of the cast well body, and cooling water is arranged in the cast well steam retention space; an air supply assembly is arranged on one side of the top of the casting well body, and an air inducing assembly is arranged on the other side of the top of the casting well body. According to the invention, a hot air blower heating mode and a water vapor blowing mode are combined, hot air is firstly utilized to heat and blow away the water vapor, the gathering atmosphere of the steam is destroyed from the source, the concentration and gathering degree of the steam are greatly reduced, and the residual steam is thoroughly discharged through the negative pressure air draft system, so that through the double-pipe treatment mode, the energy consumption is reduced, and the energy consumption is reduced. And the trouble caused by steam in the deep well aluminum bar casting process can be more efficiently and thoroughly solved, and a powerful guarantee is provided for safe production and high-quality production of aluminum alloy DC bars.

Description

Technical Field

[0001] The present invention relates to the technical field of deep-well casting aluminum alloy DC bars, and more specifically, to a device and method for removing steam from deep-well casting aluminum bars. Background Art

[0002] In modern industrial production, aluminum alloy materials are widely used in many fields such as aerospace, automotive manufacturing, and electronic equipment due to their excellent properties such as light weight and high strength. Deep-well casting, as an important process for producing aluminum alloy DC bars, occupies a key position in the industry.

[0003] During the process of deep-well casting aluminum bars, molten aluminum at a temperature of about 720 °C needs to be gravity-cast through a mold and a graphite ring. In this process, cooling water is used to cool the high-temperature molten aluminum through the mold, and a large amount of steam is generated during this cooling process. The large overflow of these steams will cause serious visual blind spots in on-site operations, resulting in operators being unable to observe abnormal situations in the casting process in a timely manner. For example, when there is an aluminum leakage phenomenon, due to the blocked vision, the operator cannot discover and solve the problem in a timely manner, which is very likely to cause safety accidents such as scalding of personnel caused by the leakage of molten aluminum into the casting well and explosion when encountering water. This will not only cause serious damage to production equipment but also pose a great threat to the life safety of operators.

[0004] Currently, the traditional method to solve the steam problem is to use the air extraction method. However, this method has unsatisfactory effects in practical applications. On the one hand, the suction of the air extraction system is limited, and it is difficult to quickly and effectively extract a large amount of steam completely, resulting in the steam still accumulating in the operation area and unable to completely eliminate the visual blind spot. On the other hand, the traditional air extraction system is not fully designed considering the characteristics and laws of steam generation during the deep-well casting process, such as factors like the temperature, humidity, and generation speed of the steam, thus greatly reducing the air extraction effect.

[0005] Regarding the problems in the related technology, no effective solution has been proposed yet. Summary of the Invention

[0006] Regarding the problems in the related technology, the present invention proposes a device and method for removing steam from deep-well casting aluminum bars to overcome the above-mentioned technical problems existing in the existing related technology.

[0007] To this end, the specific technical solutions adopted by the present invention are as follows:

[0008] According to one aspect of the present invention, there is provided a device for removing steam from deep-well cast aluminum rods, including a casting well body. A casting well steam retention space is provided at the inner bottom of the casting well body, and cooling water is provided inside the casting well steam retention space. On one side of the top of the casting well body, a blowing component is provided, and the blowing component is used to blow away the water vapor inside the casting well body, so as to destroy the aggregation atmosphere of the water vapor at the source. On the other side of the top of the casting well body, an air extraction component is provided, and the remaining water vapor inside the casting well body is discharged outdoors through the air extraction component to ensure that the water vapor is completely removed.

[0009] Preferably, the blowing component includes a heating centrifugal fan provided on one side of the top of the casting well body. An electric heater is provided on one side of the heating centrifugal fan. A blowing pipe is provided between the electric heater and the casting well body, and a hot air regulating pressing plate is provided at the air outlet end of the blowing pipe.

[0010] Preferably, the air extraction component includes an exhaust centrifugal fan provided on the other side of the top of the casting well body. An air extraction pipe is provided between the exhaust centrifugal fan and the casting well body.

[0011] According to another aspect of the present invention, there is also provided a method for removing steam from deep-well cast aluminum rods, and the method includes:

[0012] S1. Use an electric heater to heat the air generated by the heating centrifugal fan to a preset temperature, and convey the heated hot air to the inside of the casting well steam retention space through the blowing pipe;

[0013] S2. Perform heat exchange between the water vapor generated during the cooling process of the casting well steam retention space and the hot air, and disperse the water vapor during the heat exchange process, so that the water vapor cannot aggregate to form a steam layer;

[0014] S3. After dispersing the water vapor, use the negative pressure generated by the exhaust centrifugal fan to suck the remaining water vapor inside the casting well body into the air extraction pipe, and discharge the remaining water vapor outdoors through the air extraction pipe, so as to completely remove the water vapor inside the casting well body.

[0015] Preferably, the preset temperature for using an electric heater to heat the air generated by the heating centrifugal fan to a preset temperature is 170°C;

[0016] The negative pressure for using the negative pressure generated by the exhaust centrifugal fan to suck the remaining water vapor inside the casting well body into the air extraction pipe is 2700 Pa.

[0017] Preferably, performing heat exchange between the water vapor generated during the cooling process of the casting well steam retention space and the hot air, and dispersing the water vapor during the heat exchange process, so that the water vapor cannot aggregate to form a steam layer includes:

[0018] S21. Collect historical heat exchange data when the hot air contacts the water vapor in the casting well steam retention space;

[0019] S22. Input the historical heat exchange data into a pre-constructed parametric boundary model to simulate the multiphase flow mode of hot air and water vapor during the heat exchange process;

[0020] S23. Based on the multiphase flow mode, track the airflow path formed when the hot air enters the casting well body, and predict the degree of dispersion of the hot air on the steam accumulation area inside the casting well body according to the airflow path;

[0021] S24. Optimize the downward pressing angle of the hot air regulating pressing plate based on the prediction result of the degree of dispersion to obtain the optimal downward pressing angle of the hot air regulating pressing plate;

[0022] S25. According to the optimal downward pressing angle, make the hot air form an airflow in a preset direction when entering the casting well body, and disperse the water vapor through the airflow dynamic action, so that the water vapor cannot accumulate to form a steam layer.

[0023] Preferably, inputting the historical heat exchange data into a pre-constructed parametric boundary model to simulate the multiphase flow mode of hot air and water vapor during the heat exchange process includes:

[0024] S221. Obtain the point cloud data of the casting well body, and construct the parametric boundary model of the casting well body through a non-uniform surface reconstruction algorithm;

[0025] S222. Input the initial heat exchange data into the parametric boundary model, calculate the transient flow field sequence of the hot air through the parametric boundary model, and calculate the spatial mode characterization of the hot air entering the inside of the casting well body and exchanging heat with the water vapor according to the transient flow field sequence;

[0026] S223. Perform singular value decomposition on the spatial mode characterization to obtain several dominant modes, and construct an orthogonal decomposition basis function based on the dominant modes to analyze the multiphase flow mode of hot air and water vapor during the heat exchange process.

[0027] Preferably, performing singular value decomposition on the spatial mode characterization to obtain several dominant modes, and constructing an orthogonal decomposition basis function based on the dominant modes to analyze the multiphase flow mode of hot air and water vapor during the heat exchange process includes:

[0028] S2231. Select the spatial mode basis function cluster, perform mode expansion on the spatial mode characterization during the heat exchange of hot air and water vapor, and determine the decomposition order of the spatial mode characterization;

[0029] S2232. Construct a dominant spatial mode matrix based on the decomposition order of the spatial mode characterization, decompose the dominant spatial mode matrix into a set of mode matrices in column vector form, and perform singular value decomposition on the set of mode matrices;

[0030] S2233. Compare the decomposed singular values with a preset threshold, select the singular values greater than the preset threshold as the main singular values, and intercept the modes within a preset range in the dominant space mode matrix through the main singular values to obtain the dominant modes;

[0031] S2234. Construct an orthogonal mode basis function based on the dominant modes, project the modes formed by the hot air and water vapor during the heat exchange process of each time slice into the dominant basis function space, and realize the reconstruction of the multiphase flow mode.

[0032] Preferably, based on the multiphase flow mode, tracking the air flow path formed when the hot air enters the casting well body, predicting the degree of dispersion of the hot air on the steam accumulation area inside the casting well body according to the air flow path includes:

[0033] S231. Establish a transient velocity field of the hot air and water vapor in the casting well body based on the multiphase flow mode, and use the optimal path tracking technology to obtain the air flow path formed by the hot air passing through the hot air regulating pressing plate;

[0034] S232. Conduct a spatial overlap analysis of the air flow path and the steam accumulation area inside the casting well body, and predict the degree of dispersion of the air flow path passing through the steam accumulation area.

[0035] Preferably, using the optimal path tracking technology to obtain the air flow path formed by the hot air passing through the hot air regulating pressing plate includes:

[0036] Collect the air flow molecule set formed by the hot air passing through the hot air regulating pressing plate, randomly select an air flow molecule from the air flow molecule set as the first source point, and calculate the original propagation path from the first source point to the remaining air flow molecules;

[0037] Select the air flow molecules corresponding to the original propagation paths within a preset range and combine them to generate a new air flow molecule set;

[0038] Randomly select an air flow molecule from the new air flow molecule set as the second source point again, calculate the new propagation path from the second source point to the remaining air flow molecules, and transfer the air flow molecules corresponding to the new propagation paths within a preset range to the original air flow molecule set;

[0039] Compare the number of air flow molecules in the original air flow molecule set and the new air flow molecule set. If the number of air flow molecules in the original air flow molecule set is less than that in the new air flow molecule set, repeat the calculation of the propagation path to continue updating the path, otherwise, end the propagation path tracking.

[0040] The beneficial effects of the present invention are:

[0041] 1. The present invention combines the methods of heating and dispersing water vapor by a hot air blower. First, the hot air is used to heat and disperse the water vapor, which destroys the aggregation atmosphere of the vapor at the source, greatly reduces the concentration and aggregation degree of the vapor, and the remaining vapor is completely discharged through a negative pressure air extraction system. This two-pronged treatment method can more efficiently and thoroughly solve the problems caused by vapor during the deep well casting of aluminum rods, providing a strong guarantee for the safe production and high-quality production of aluminum alloy DC rods, and solving the defect that the traditional air extraction method only extracts the vapor by suction, which has poor effect on the already formed thick vapor layer and cannot fundamentally destroy the aggregation state of the vapor.

[0042] 2. The device for removing vapor from deep well casting aluminum rods provided by the present invention fully considers the actual needs of industrial production and the convenience of operation. The installation and maintenance of each component are relatively convenient, and the operation stability of the whole device is high, which can adapt to complex industrial production environments. At the same time, the energy consumption of this removal device is reasonable. While effectively solving the vapor problem, it will not bring an excessive production cost burden to the enterprise, and has good economic and social benefits.

[0043] 3. The device for removing vapor from deep well casting aluminum rods provided by the present invention provides an efficient, reliable and economical solution to the vapor problem in the deep well casting aluminum rod process through a unique structural design and innovative vapor treatment principle, and is expected to be widely applied and promoted in the aluminum alloy production industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0045] Figure 1 is a schematic structural diagram of a device for removing vapor from deep well casting aluminum rods according to an embodiment of the present invention;

[0046] Figure 2 is a schematic structural diagram of a device for removing vapor from deep well casting aluminum rods from another angle according to an embodiment of the present invention;

[0047] Figure 3 is a flowchart of a method for removing vapor from deep well casting aluminum rods according to an embodiment of the present invention;

[0048] Figure 4 is a schematic structural diagram of a buried part in a device for removing vapor from deep well casting aluminum rods according to an embodiment of the present invention;

[0049] Figure 5It is a sectional view of the embedded part with A-A as the cutting line in a device for removing steam from aluminum rods cast in deep wells according to an embodiment of the present invention;

[0050] Figure 6 It is a sectional view of the embedded part with B-B as the cutting line in a device for removing steam from aluminum rods cast in deep wells according to an embodiment of the present invention;

[0051] Figure 7 It is a sectional view of the embedded part with the C-direction cutting line in a device for removing steam from aluminum rods cast in deep wells according to an embodiment of the present invention.

[0052] In the figure:

[0053] 1. Cast well body; 2. Steam retention space in the cast well; 3. Cooling water; 4. Air supply assembly; 401. Heating centrifugal fan; 402. Electric heater; 403. Air supply pipe; 404. Hot air regulating pressing plate; 5. Air extraction assembly; 501. Exhaust centrifugal fan; 502. Air extraction pipe; 6. Reserved hole for cooling water inlet pipe. Specific embodiments

[0054] To further illustrate the embodiments, the present invention provides drawings, which are part of the disclosure of the present invention. They are mainly used to illustrate the embodiments and can be used to explain the operating principle of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present invention.

[0055] According to an embodiment of the present invention, a device and method for removing steam from aluminum rods cast in deep wells are provided.

[0056] Now, the present invention will be further described in conjunction with the drawings and specific embodiments. As Figure 1-2 shown, the device for removing steam from aluminum rods cast in deep wells according to an embodiment of the present invention includes a cast well body 1. A steam retention space 2 is provided at the inner bottom of the cast well body 1, and cooling water 3 is provided inside the steam retention space 2; on one side of the top of the cast well body 1, an air supply assembly 4 is provided, and the air supply assembly 4 is used to blow away the water vapor inside the cast well body 1, so as to destroy the aggregation atmosphere of the water vapor from the source. On the other side of the top of the cast well body 1, an air extraction assembly 5 is provided, and the air extraction assembly 5 is used to discharge the remaining water vapor inside the cast well body 1 to the outside of the room, so as to ensure that the water vapor is completely removed.

[0057] In practical applications, the embedded parts of the present invention are as Figures 4-7 shown ( Figure 4 including a reserved hole 6 for the cooling water inlet pipe). The embedded parts must be welded firmly to the concrete steel bars; the plate thickness of the embedded parts is 20 mm or 10 mm; the spaces inside the square boxes are connected, and welding air leakage is not allowed. They are embedded as steam suction ports; the horizontal embedded plates are basically not stressed and only protect the wellhead.

[0058] Among them, the air supply component 4 includes a heating centrifugal fan 401 arranged on one side of the top of the casting well body 1. An electric heater 402 is arranged on one side of the heating centrifugal fan 401. A air supply pipe 403 is arranged between the electric heater 402 and the casting well body 1. A hot air regulating pressing plate 404 is arranged at the air outlet end of the air supply pipe 403.

[0059] It should be noted that the working principle of the air supply component 4 is as follows:

[0060] Install a heating centrifugal fan 401 with strong wind power on the side of the casting well body 1 (casting machine well). The air volume of the heating centrifugal fan 401 can reach 8000m 3 / h. As the blower of the whole device, the air blown out by the heating centrifugal fan 401 will first enter the electric heater 402. The electric heater 402 can quickly and stably heat the air to about 170°C by using heating technology. The heated hot air will then be sent into the casting well body 1 through the air supply pipe 403. Among them, a hot air regulating pressing plate 404 is arranged at the air outlet of the air supply pipe 403, and the specific downward pressing angle of the hot air regulating pressing plate 404 has been optimized through several simulations and tests, which can ensure that the hot air enters the casting well body 1 in the best way, so as to achieve the best steam dispersing effect.

[0061] Among them, the air extraction component 5 includes an exhaust centrifugal fan 501 arranged on the other side of the top of the casting well body 1. An air extraction pipe 502 is arranged between the exhaust centrifugal fan 501 and the casting well body 1.

[0062] It should be noted that the working principle of the air extraction component 5 is as follows:

[0063] An air extraction pipe 502 is arranged on the other side of the casting well body 1 (casting machine well). The air extraction pipe 502 is connected to a high-performance exhaust centrifugal fan 501. The exhaust centrifugal fan 501 can generate a negative pressure of up to 2700pa and has a strong air volume of 15000m 3 / h, so as to ensure the formation of a stable and effective negative pressure environment in the casting well body 1, so as to smoothly discharge the steam to the outside.

[0064] As Figure 3 shown, according to another embodiment of the present invention, a method for removing steam from deep well cast aluminum rods is also provided. The method includes:

[0065] S1. Use the electric heater 402 to heat the air generated by the heating centrifugal fan 401 to a preset temperature, and transport the heated hot air to the inside of the casting well steam retention space 2 through the air supply pipe 403.

[0066] S2. Exchange heat between the water vapor generated in the casting well steam retention space 2 during the cooling process and the hot air, and disperse the water vapor during the heat exchange process so that the water vapor cannot aggregate to form a steam layer.

[0067] Among them, exchanging heat between the water vapor generated in the casting well steam retention space 2 during the cooling process and the hot air, and dispersing the water vapor during the heat exchange process so that the water vapor cannot aggregate to form a steam layer includes:

[0068] S21. Collect historical heat exchange data when the hot air contacts the water vapor in the casting well steam retention space 2;

[0069] S22. Input the historical heat exchange data into a pre-constructed parametric boundary model to simulate the multiphase flow mode of the hot air and the water vapor during the heat exchange process.

[0070] Among them, inputting the historical heat exchange data into a pre-constructed parametric boundary model to simulate the multiphase flow mode of the hot air and the water vapor during the heat exchange process includes:

[0071] S221. Obtain the point cloud data of the casting well body 1, and construct the parametric boundary model of the casting well body 1 through the non-uniform surface reconstruction algorithm.

[0072] It should be noted that the point cloud data of the casting well body 1 is obtained by using other measurement techniques such as laser scanning, and the point cloud data represents the surface morphology of the casting well body 1, which is usually non-uniform and noisy. The non-uniform surface reconstruction algorithm is used to process the point cloud data and convert the point cloud data into a smooth and continuous parametric surface.

[0073] Among them, the non-uniform surface reconstruction algorithm is usually based on B-spline, non-uniform rational B-spline or other surface fitting methods. Through the non-uniform surface reconstruction algorithm, the point cloud data is mapped into a low-dimensional parameter space for accurate modeling of the well body surface to generate a parametric model describing the boundary morphology of the well body. Among them, the non-uniform surface reconstruction algorithm includes:

[0074] Remove noise and simplify the point cloud; approximate the point cloud using surface basis functions; calculate the parametric coordinates of each point according to the fitting result and map the point cloud into the parameter space; smooth the fitted surface to ensure that the surface has no obvious mutations or discontinuities, and finally obtain the accurate parametric boundary model of the casting well body 1.

[0075] S222. Input the initial heat exchange data into the parametric boundary model, calculate the transient flow field sequence of the hot air through the parametric boundary model, and calculate the spatial mode characterization of the hot air entering the casting well body 1 and exchanging heat with the water vapor according to the transient flow field sequence.

[0076] It should be noted that after establishing the parametric geometric boundary model of the casting well body 1 in step S221, the input boundary conditions of the hot air (such as temperature, velocity, pressure) and the initial distribution state of the steam are used as the initial conditions to calculate the change of the hot air flow over time in the parametric geometric domain, that is, the "transient flow field", which specifically includes:

[0077] Discretize the parametric boundary model into finite elements or finite volume meshes, and input the heat exchange data into the parametric boundary model. The heat exchange data includes the hot air temperature field, velocity vector, inlet pressure, etc.;

[0078] Based on the control momentum conservation equation and solve the control momentum conservation equation numerically through CFD to obtain the velocity vector field u(x, y, z, t), temperature field T(x, y, z, t), and turbulent energy at different time steps.

[0079] Among them, "transient" represents an unsteady state that changes over time; "flow field" represents the velocity, temperature, and pressure distribution of the air flow in space. Therefore, the transient flow field represents the continuous evolution data of the hot air flow field (physical quantities such as velocity and temperature) in the casting well within the entire three-dimensional space at multiple consecutive time steps. The instantaneous flow field can be represented as a series of four-dimensional tensors: U(x, y, z, t i ), i = 1, 2,..., N, where each t i represents the flow field state at a time step.

[0080] "Spatial mode characterization" means extracting the main spatial change patterns from the transient flow field sequence, that is, representing the complex interaction process between the hot air and the steam in the casting well as the superposition of a finite number of spatial distribution structures (modes) and time coefficients. The goal is to compress the original high-dimensional transient data into "spatial modes σ i (x, y, z)" that can represent the dominant characteristics of the system. Each mode has a weight coefficient a i (t) that changes with time t. Among them, the expression of the spatial mode characterization is:

[0081]

[0082] In this process, "mode" represents a structured pattern that describes how the air flow (or heat flow) is distributed in space, and "characterization" represents the evolution characteristics of the mode reflecting the air flow at different times.

[0083] S223. Perform singular value decomposition on the spatial mode characterization to obtain several dominant modes, and construct an orthogonal decomposition basis function based on the dominant modes to analyze the multiphase flow mode of the hot air and water vapor in the heat exchange process.

[0084] Among them, singular value decomposition is performed on the spatial modal representation to obtain a number of dominant modes, and an orthogonal decomposition basis function is constructed based on the dominant modes to analyze the multiphase flow modes of hot air and water vapor during the heat exchange process, including:

[0085] S2231. Select a cluster of spatial modal basis functions, perform modal expansion on the spatial modal representation during the heat exchange between hot air and water vapor, and determine the decomposition order of the spatial modal representation.

[0086] It should be noted that the cluster of spatial modal basis functions is a set of functions used to describe the spatial characteristics in the process of complex flow (such as the heat exchange between hot air and water vapor). Each function represents a specific spatial distribution pattern in the system, and they are obtained from the original flow field data through modal decomposition methods (such as the orthogonal modal basis functions in the present invention. By performing singular value decomposition on the flow field data, the orthogonal modal basis functions can extract the orthogonal spatial modes that best represent the system characteristics, and these modes are usually the dominant dynamic modes).

[0087] The role of the cluster of spatial modal basis functions is to represent the main characteristics of the flow field through a set of linearly independent function bases, so as to simplify the problem-solving process. Specifically, they help extract representative "spatial patterns" from the complex three-dimensional flow field data, and these patterns can vary over time through the corresponding time coefficients.

[0088] S2232. Construct a dominant spatial modal matrix based on the decomposition order of the spatial modal representation, decompose the dominant spatial modal matrix into a set of modal matrices in column vector form, and perform singular value decomposition on the set of modal matrices;

[0089] S2233. Compare the decomposed singular values with a preset threshold, select the singular values greater than the preset threshold as the main singular values, and intercept the modes within a preset range in the dominant spatial modal matrix through the main singular values to obtain the dominant modes;

[0090] S2234. Construct an orthogonal modal basis function based on the dominant modes, project the modes formed by hot air and water vapor during the heat exchange process at each time slice into the dominant basis function space, and realize the reconstruction of the multiphase flow mode.

[0091] It should be noted that the dominant mode refers to the spatial mode that can best represent the flow characteristics during the multiphase flow process, especially during the heat exchange between hot air and water vapor. The dominant mode is obtained through mode decomposition and is closely related to the dominant characteristics of fluid dynamics (such as the main modes of the velocity field and temperature field). Among them, the orthogonal mode basis functions refer to a set of basis functions with orthogonality (mutually independent), and these basis functions are used to represent the spatial distribution of the flow field. Each basis function represents the main variation mode of hot air and water vapor at a specific spatial scale. In the orthogonal basis function space, the flow data can be represented by a linear combination, which can simplify the representation of complex flow fields and improve the calculation efficiency.

[0092] Among them, projecting the modes formed by hot air and water vapor during the heat exchange process of each time slice into the dominant basis function space to realize the reconstruction of multiphase flow modes includes:

[0093] The flow states of hot air and water vapor in each time slice are represented by various physical quantities (such as temperature, velocity, etc.) in the flow field. These physical quantities change over time and show the interaction between hot air and water vapor in the multiphase flow in space. For each time slice, project the flow field data at this time point into the already constructed orthogonal mode basis function space.

[0094] Specifically, obtain a flow field data matrix containing multiple time steps. Each column in the flow field data matrix represents the transient flow field at a certain time point, and project this flow field data into the determined orthogonal mode basis function space σ i (x, y, z) to obtain the projection coefficients for each time step. After mode expansion and projection, recombine all the main modes of the hot air and water vapor heat exchange process to obtain an approximate flow field reconstruction. This process is achieved by combining all the time coefficients with the dominant spatial modes, so that the original flow field data is effectively reconstructed into a linear combination of orthogonal mode basis functions, and the main dynamic characteristics of the system are retained in the reconstructed flow field.

[0095] S23. Based on the multiphase flow mode, track the airflow path formed when hot air enters the casting well body 1, and predict the degree of dispersion of the hot air along the airflow path to the steam accumulation area inside the casting well body 1.

[0096] Among them, based on the multiphase flow mode, tracking the airflow path formed when hot air enters the casting well body 1 and predicting the degree of dispersion of the hot air along the airflow path to the steam accumulation area inside the casting well body 1 includes:

[0097] S231. Based on the multiphase flow mode, establish the transient velocity field of hot air and water vapor in the casting well body 1, and use the optimal path tracking technology to obtain the airflow path formed by the hot air passing through the hot air regulating pressing plate.

[0098] Among them, obtaining the air flow path formed by the hot air passing through the hot air regulating pressing plate by using the optimal path tracking technology includes:

[0099] Collect the air flow molecule set formed by the hot air passing through the hot air regulating pressing plate, randomly select an air flow molecule from the air flow molecule set as the first source point, and calculate the original propagation paths from the first source point to the remaining air flow molecules;

[0100] Select the air flow molecules corresponding to the original propagation paths within a preset range and combine them to generate a new air flow molecule set;

[0101] Randomly select an air flow molecule from the new air flow molecule set as the second source point again, calculate the new propagation paths from the second source point to the remaining air flow molecules, and transfer the air flow molecules corresponding to the new propagation paths within the preset range to the original air flow molecule set;

[0102] Compare the number of air flow molecules in the original air flow molecule set and the new air flow molecule set. If the number of air flow molecules in the original air flow molecule set is less than that in the new air flow molecule set, then repeat the calculation of the propagation paths to continue updating the paths. Otherwise, end the propagation path tracking.

[0103] It should be noted that by adopting the iterative source point propagation and path update strategy to realize the dynamic tracking and optimization of the air flow path, the effect is to gradually expand and optimize the propagation paths of the air flow molecules. Through mechanisms such as source point propagation, range limitation, and path transfer, representative and concentrated air flow propagation regions are screened out, and finally a stable and representative main air flow path is formed.

[0104] Using the optimal path tracking technology to obtain the air flow path formed by the hot air passing through the hot air regulating pressing plate 404 can effectively capture the optimal path of the hot air propagating in the casting well body after passing through the hot air regulating pressing plate, and achieve the goal of extracting high-value air flow trajectories from the mixed distribution. The effect of this method on the hot air path tracking is reflected in being able to dynamically reconstruct the flow trajectory of the hot air in the complex space based on the spatial relationship and propagation intensity between the air flow molecules, so as to accurately depict the dominant propagation direction, flow channel, and heat exchange area of the hot air, provide reliable data support for the hot air regulation design, and greatly improve the accuracy of path prediction and the efficiency of the hot air to disperse steam.

[0105] S232. Perform a spatial overlap analysis on the air flow path and the steam aggregation area inside the casting well body 1 to predict the degree of dispersion of the air flow path passing through the steam aggregation area.

[0106] It should be noted that performing a spatial overlap analysis on the air flow path and the steam aggregation area inside the casting well body 1 to predict the degree of dispersion of the air flow path passing through the steam aggregation area includes:

[0107] Step 1: Compare the three-dimensional spatial data of the air flow path with the steam accumulation area to obtain the overlapping area between the air flow path and the steam accumulation area. The overlapping area is the spatial part where the air flow passes through the steam layer and is also the area where heat exchange occurs between the air flow and the steam layer.

[0108] Step 2: In the overlapping analysis of the air flow path and the steam accumulation area, introduce weighting factors, such as flow velocity. The higher the flow velocity, the stronger the disturbance effect of the air flow on the steam; temperature. The air flow with a higher temperature can exchange heat with the steam more effectively, improving the dispersion effect; steam concentration. The concentration of the steam layer also affects the efficiency of heat exchange. The higher the steam concentration, the more obvious the heat exchange and dispersion effects of the air flow.

[0109] Among them, the expression of the weighting factor for each overlapping point is:

[0110] w(x, y, z) = f(flow velocity, temperature, steam concentration);

[0111] In the formula, w(x, y, z) represents the weighting factor for each overlapping point; flow velocity represents the flow velocity; temperature represents the temperature; steam concentration represents the steam concentration.

[0112] For example, using the weighted average of the flow velocity v(x, y, z) and the temperature T(x, y, z), define the weighting factor:

[0113] w(x, y, z) = α·v(x, y, z) + β·T(x, y, z);

[0114] In the formula, both α and β represent weighting coefficients, which are used to adjust the relative importance of the flow velocity and the temperature.

[0115] Step 3: Calculate the overlapping part of the air flow path and the steam accumulation area through weighted integration. For each volume element d in the overlapping area, its weighted contribution is:

[0116] O = ∫ Voverlap w(x,y, z)dV;

[0117] In the formula, O represents the weighted contribution; V overlap represents the overlapping area between the air flow path and the steam accumulation area; w(x, y, z) represents the weighting factor in this area; dV represents the small volume element in the overlapping area.

[0118] Step 4: Calculate the "perturbation effect" quantization and dispersion degree of the air flow path on the steam layer, which is characterized by the heat exchange intensity of the air flow on the steam layer, specifically through the weighted overlap degree. The higher the weighted overlap degree, the stronger the heat exchange and dispersion effect of the air flow on the steam layer, and the higher the dispersion degree. Specifically, the ratio of the weighted integral result of the overlapping area to the maximum value in all possible overlapping areas is used as a threshold function to measure the dispersion degree.

[0119] S24. Optimize the downward pressing angle of the hot air regulating pressing plate 404 based on the prediction result of the dispersion degree to obtain the optimal downward pressing angle of the hot air regulating pressing plate 404;

[0120] S25. According to the optimal downward pressing angle, make the hot air form an air flow in a preset direction when entering the casting well body 1, and disperse the water vapor through the air flow dynamic action, so that the water vapor cannot gather to form a steam layer.

[0121] It should be noted that optimizing the downward pressing angle of the hot air regulating pressing plate 404 based on the prediction result of the dispersion degree to obtain the optimal downward pressing angle of the hot air regulating pressing plate 404 has the effect of significantly improving the heat exchange efficiency between the hot air and the steam, ensuring that the hot air can enter the casting well body 1 in the best way, thereby maximizing the steam blowing effect.

[0122] Through multiple simulations and tests for optimization, the angle of the hot air regulating pressing plate 404 can be finely adjusted to ensure that the flow path, speed and temperature of the hot air reach the optimal state, thereby effectively dispersing the steam layer, avoiding steam accumulation, and improving the heat exchange performance of the entire system. In addition, the optimized angle can reduce unnecessary energy waste, improve the utilization efficiency of the hot air, and make the heat exchange process more stable and reliable. In each optimization process, the finely adjusted pressing angle can ensure that the interaction between the air flow and the steam layer is maximized when the air flow enters the casting well body, achieving an ideal steam dispersion effect, thereby improving the performance and efficiency of the entire hot air regulating system, and further enhancing the flexibility and reliability of control.

[0123] S3. After dispersing the water vapor, use the negative pressure generated by the exhaust centrifugal fan 501 to suck the remaining water vapor inside the casting well body 1 into the air duct, and discharge the remaining water vapor to the outside through the air duct 502, so as to completely remove the water vapor inside the casting well body 1.

[0124] To facilitate the understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in the actual process will be described in detail below.

[0125] In practical applications, first, a heating centrifugal fan 401 with strong wind power is installed on the side of the casting well body 1 and serves as the blower of the entire device. The wind blown by the heating centrifugal fan 401 first enters the electric heater 402. The electric heater 402 can quickly and stably heat the wind to about 170°C using heating technology. The heated hot air then enters the interior of the casting well body 1 through the air supply pipe 403. The air outlet of the air supply pipe 403 is provided with a hot air regulating pressing plate 404. Through the specific downward pressing angle of the hot air regulating pressing plate 404, it can ensure that the hot air enters the casting well in the best way, so as to achieve the best steam dispersing effect. On the other side of the casting well body 1, there is an air extraction pipe 502, and the air extraction pipe 502 is connected to a high-performance exhaust centrifugal fan 501. The exhaust centrifugal fan 501 can generate a negative pressure of up to 2700 Pa and has a strong air volume of 15000 m 3 / h, ensuring a stable and effective negative pressure environment in the casting well, so as to smoothly discharge the steam to the outside.

[0126] Among them, the working principle of steam treatment is as follows:

[0127] When a large amount of water vapor is generated during the cooling process in the steam retention space inside the casting well body 1, the 170°C hot air sent from the air supply pipe 403 meets the water vapor. On the one hand, there will be a strong heat exchange between the high-temperature hot air and the water vapor. The heat of the hot air is transferred to the water vapor, causing the temperature of the water vapor to rise and the molecular movement to intensify, thus destroying the stable atmosphere originally formed by the aggregation of the water vapor. On the other hand, due to the downward pressing angle of the air outlet of the air supply pipe 403, the hot air will form an air flow in a specific direction when entering the casting well. The dynamic effect of this air flow will further disperse the water vapor, making it impossible to gather and form a thick steam layer in the operation area, thereby effectively eliminating the visual blind area caused by the steam.

[0128] After the hot air disperses the steam, there will still be a small amount of remaining steam in the casting well body 1. At this time, the air extraction component 5 comes into play. The exhaust centrifugal fan 501 connected to the air extraction pipe 502 generates a negative pressure of 2700 Pa, forming a strong suction force in the casting well body 1. Under the action of this negative pressure, the remaining small amount of steam will be quickly sucked into the air extraction pipe 502 and smoothly discharged to the outside through the air extraction pipe 502, ensuring that the steam in the casting well can be completely removed and maintaining a good production environment.

[0129] In summary, by means of the above technical solutions of the present invention, the present invention ingeniously combines the methods of heating and dispersing water vapor by a hot air blower. First, the hot air is used to heat and disperse the water vapor, which destroys the aggregation atmosphere of the steam from the source, greatly reducing the concentration and aggregation degree of the steam. Then, the remaining steam is completely discharged through the negative pressure air extraction system. This two-pronged treatment method can solve the problems caused by steam during the deep-well casting of aluminum rods more efficiently and thoroughly, providing a strong guarantee for the safe and high-quality production of aluminum alloy DC bars, and solving the defect that the traditional air extraction method only extracts the steam by suction, which has poor effect on the already formed thick steam layer and cannot fundamentally destroy the aggregation state of the steam. The device for removing steam from deep-well casting aluminum rods provided by the present invention fully considers the actual needs of industrial production and the convenience of operation. The installation and maintenance of each component are relatively convenient, and the operation stability of the whole device is high, which can adapt to complex industrial production environments. At the same time, the energy consumption of the removal device is reasonable. While effectively solving the steam problem, it will not bring an excessive production cost burden to the enterprise, and has good economic and social benefits. The device for removing steam from deep-well casting aluminum rods provided by the present invention provides an efficient, reliable and economical solution for the steam problem in the deep-well casting aluminum rod process through a unique structural design and innovative steam treatment principle, and is expected to be widely applied and promoted in the aluminum alloy production industry.

[0130] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "setting", "connection", "fixation", "swivel connection" and other terms shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; 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 internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0131] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for removing steam from deep well cast aluminum rods, comprising a casting well body, characterized in that: The inner bottom of the casting well body is provided with a casting well steam retention space, and cooling water is provided inside the casting well steam retention space; An air supply assembly is provided on one side of the top of the casting well body, and the water vapor inside the casting well body is blown away by the air supply assembly to destroy the gathering atmosphere of water vapor from the source. An air induced draft assembly is provided on the other side of the top of the casting well body, and the remaining water vapor inside the casting well body 1 is discharged to the outside through the air induced draft assembly to ensure that the water vapor is completely removed.

2. The device for removing steam from deep well cast aluminum rods according to claim 1, characterized in that: The air supply assembly includes a heating centrifugal fan arranged on one side of the top of the casting well body, an electric heater is arranged on one side of the heating centrifugal fan, an air supply pipe is arranged between the electric heater and the casting well body, and a hot air regulating pressure plate is arranged at the air outlet end of the air supply pipe.

3. The device for removing steam from deep well cast aluminum rods according to claim 1, characterized in that: The induced air component includes an exhaust centrifugal fan arranged on the other side of the top of the casting well body, and an induced air pipe is arranged between the exhaust centrifugal fan and the casting well body.

4. A method for removing steam from deep well cast aluminum rods, using the device for removing steam from deep well cast aluminum rods as described in any one of claims 1 to 3 to remove steam, characterized in that: The method includes: S1. Using an electric heater to heat the air generated by the heating centrifugal fan to a preset temperature, and delivering the heated hot air to the interior of the steam retention space of the casting well through an air supply pipe; S2, exchanging heat between the water vapor generated in the steam retention space of the casting well during the cooling process and the hot air, and dispersing the water vapor during the heat exchange process so that the water vapor cannot gather to form a steam layer; S3. After the water vapor is dispersed, the negative pressure generated by the centrifugal exhaust fan is used to suck the remaining water vapor inside the casting well body into the induced draft duct, and the remaining water vapor is discharged to the outside through the induced draft duct, so that the water vapor inside the casting well body is completely removed.

5. A method for removing steam from deep well cast aluminum rods according to claim 4, characterized in that: The electric heater is used to heat the wind generated by the heating centrifugal fan to a preset temperature of 170° C. The negative pressure generated by the centrifugal exhaust fan is used to suck the remaining water vapor inside the casting well into the air duct at a negative pressure of 2700pa.

6. A method for removing steam from deep well cast aluminum rods according to claim 4, characterized in that: The step of exchanging heat between the water vapor generated in the steam retention space of the casting well during the cooling process and the hot air, and dispersing the water vapor during the heat exchange process so that the water vapor cannot gather to form a steam layer, comprises: S21, collecting historical heat exchange data when hot air contacts water vapor in the steam retention space of the casting well; S22, inputting historical heat exchange data into a pre-built parameterized boundary model to simulate the multiphase flow mode of hot air and water vapor during the heat exchange process; S23, based on the multiphase flow mode, tracking the airflow path formed when the hot air enters the casting well body, and predicting the degree to which the hot air disperses the steam accumulation area inside the casting well body according to the airflow path; S24, optimizing the downward pressing angle of the hot air regulating platen based on the prediction result of the degree of dispersion, and obtaining the optimal downward pressing angle of the hot air regulating platen; S25. When the hot air enters the casting well body according to the optimal downward pressing angle, an airflow in a preset direction is formed, and water vapor is dispersed by the dynamic effect of the airflow, so that the water vapor cannot gather to form a steam layer.

7. A method for removing steam from deep well cast aluminum rods according to claim 6, characterized in that: The inputting of historical heat exchange data into a pre-built parameterized boundary model to simulate the multiphase flow mode of hot air and water vapor in the heat exchange process includes: S221, obtaining point cloud data of the casting well body, and constructing a parameterized boundary model of the casting well body by using a non-uniform surface reconstruction algorithm; S222, inputting the initial heat exchange data into the parameterized boundary model, calculating the transient flow field sequence of the hot air through the parameterized boundary model, and calculating the spatial modal representation of the hot air entering the well body and exchanging heat with the water vapor according to the transient flow field sequence; S223. Perform singular value decomposition on the spatial modal representation to obtain several dominant modes, and construct orthogonal decomposition basis functions based on the dominant modes to analyze the multiphase flow modes of hot air and water vapor in the heat exchange process.

8. A method for removing steam from deep well cast aluminum rods according to claim 7, characterized in that: The singular value decomposition of the spatial modal representation is performed to obtain several dominant modes, and an orthogonal decomposition basis function is constructed based on the dominant modes to analyze the multiphase flow modes of hot air and water vapor in the heat exchange process, including: S2231. Select a spatial modal basis function cluster, perform modal expansion on the spatial modal representation of heat exchange between hot air and water vapor, and determine the decomposition order of the spatial modal representation; S2232. constructing a dominant spatial modal matrix based on the decomposition order of the spatial modal representation, decomposing the dominant spatial modal matrix into a set of modal matrices in the form of column vectors, and performing singular value decomposition on the set of modal matrices; S2233, comparing the decomposed singular values ​​with a preset threshold, selecting a singular value greater than the preset threshold as a main singular value, and intercepting the modes within a preset range in the dominant spatial modal matrix through the main singular value to obtain the dominant mode; S2234. Construct an orthogonal modal basis function based on the dominant mode, project the mode formed by the hot air and water vapor in the heat exchange process of each time slice into the dominant basis function space, and realize the reconstruction of the multiphase flow mode.

9. The method for removing steam from deep well cast aluminum rods according to claim 6, characterized in that: The method of tracking the airflow path formed when the hot air enters the casting well body based on the multiphase flow mode and predicting the degree to which the hot air disperses the steam accumulation area inside the casting well body according to the airflow path includes: S231, establishing a transient velocity field of hot air and water vapor in the casting well body based on the multiphase flow mode, and using the optimal path tracking technology to obtain the air flow path formed by the hot air passing through the hot air regulating plate; S232, performing spatial overlap analysis on the airflow path and the steam gathering area inside the casting well body, and predicting the degree of dispersion of the airflow path passing through the steam gathering area.

10. A method for removing steam from deep well cast aluminum rods according to claim 9, characterized in that: The method of using the optimal path tracking technology to obtain the airflow path formed by the hot air passing through the hot air regulating plate includes: Collect the airflow molecule set formed by the hot air passing through the hot air regulating plate, randomly select an airflow molecule from the airflow molecule set as the first source point, and calculate the original propagation path from the first source point to the remaining airflow molecules; Select the airflow molecules corresponding to the original propagation path within the preset range and combine them to generate a new set of airflow molecules; Randomly select airflow molecules from the new airflow molecule set as the second source point again, calculate the new propagation path from the second source point to the remaining airflow molecules, and transfer the airflow molecules corresponding to the new propagation path within the preset range to the original airflow molecule set; Compare the number of airflow molecules in the original airflow molecule set with the number of airflow molecules in the new airflow molecule set. If the number of airflow molecules in the original airflow molecule set is less than that in the new airflow molecule set, repeat the calculation of the propagation path to continue updating the path. Otherwise, end the propagation path tracking.

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