Method and device for stabilizing green ball feeding amount and storage medium

Abstract

The application discloses a method and device for maintaining green ball feeding amount and a storage medium. The cross-sectional area of green balls on a wide belt of a belt roaster and the running speed of the wide belt are detected in real time, and the green ball flow is calculated. Abnormal fluctuations of the green ball flow are captured in real time and accurately, and data support is provided for subsequent green ball feeding amount maintaining control. The average values of the green ball flow and the pallet material thickness in a period are obtained, the running speed of the belt roaster is adjusted when the difference between the average values of the green ball flow of two adjacent periods is large, and the running speed of the roller screen of the belt roaster is adjusted when the difference between the average value of the pallet material thickness and a preset material thickness is large. The method realizes hierarchical regulation, the roller screen and the belt roaster are coordinately adjusted, short-term buffering and long-term stability are considered, the green ball feeding amount can be maintained stably when the green ball flow continuously or greatly fluctuates. Meanwhile, manual operation is replaced, the real-time performance and stability of control are improved, timely and accurate maintenance of the green ball feeding amount is realized, and the balling quality is further improved.

Description

Technical Field

[0001] This application relates to the field of belt roaster technology, and in particular to a method, apparatus and storage medium for stabilizing the amount of green pellets fed into the machine. Background Technology

[0002] A belt calciner is a pellet production equipment where processes such as dehydration, heating oxidation, and cooling of green pellets are all completed on its trolley. The stability of parameters such as green pellet flow rate, trolley material thickness, belt calciner speed, air volume, and air temperature is crucial to ensuring the quality of the finished pellets. In actual operation, due to the influence of various factors such as particle size, physicochemical properties, binders, and moisture content of the mixture, the green pellet flow rate is prone to fluctuations, which in turn leads to fluctuations in the amount of green pellets entering the trolley. This results in uneven heating during the calcination process, ultimately affecting the quality of the finished pellets.

[0003] In existing technologies, adjusting the speed of the roller screen (the direct feeding device upstream of the belt calciner) can temporarily increase or decrease the green pellet feed rate, thereby maintaining a stable green pellet feed volume. However, the roller screen has no material storage function and can only adjust the green pellet falling speed for a short time. When the green pellet flow rate fluctuates continuously or significantly, it still cannot effectively maintain a stable green pellet feed volume. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a method, apparatus, and storage medium for maintaining a stable green pellet feed rate, thereby continuously ensuring a stable green pellet feed rate and improving the quality of the finished pellets.

[0005] This application discloses a method for stabilizing the amount of raw pellets entering the machine, the method comprising: The green pellet flow rate is calculated based on the cross-sectional area of ​​the green pellets located on the wide belt of the belt roaster and the running speed of the wide belt. The green pellet flow rate and trolley material thickness within the control cycle are processed by moving average to obtain the average green pellet flow rate and the average trolley material thickness; the trolley material thickness is obtained through a preset material thickness detection. Determine whether the difference between the average value of the raw pellet flow rate in two adjacent control cycles exceeds a preset flow rate fluctuation value; If so, adjust the operating speed of the belt roaster; If not, and the difference between the average material thickness of the trolley and the preset material thickness exceeds the preset material thickness fluctuation value, adjust the running speed of the roller screen of the belt roaster.

[0006] Optionally, calculating the green pellet flow rate based on the cross-sectional area of ​​the green pellets located on the wide belt of the belt calciner and the running speed of the wide belt includes: The green pellet flow meter is pre-installed above the wide belt; The cross-sectional area and the running speed of the wide belt are obtained through the green pellet flow meter; The cross-sectional area, the running speed of the wide belt, and the bulk density of the green pellets are multiplied to obtain the green pellet flow rate; the bulk density is a preset value.

[0007] Optionally, obtaining the cross-sectional area through the green pellet flow meter includes: The distance y from the green pellet flow meter to the material surface at the monitoring point is obtained; the monitoring point is a plurality of points preset on the wide belt, and the material surface is the top surface of the raw material at the monitoring point; Using the projection of the green pellet flow meter onto the wide belt as the origin, the distance x between the origin and the monitoring point is obtained; The material surface height is calculated based on the height of the green ball flow meter from the wide belt, the distance y, and the distance x. The cross-sectional area is calculated based on the material surface height.

[0008] Optionally, adjusting the operating speed of the belt roaster includes: The difference between the average values ​​of the raw pellet flow rate in two adjacent control cycles is taken as the first difference. The speed difference between the maximum and minimum speeds of the trolley, and the material difference between the maximum and minimum material quantities are obtained; the maximum speed, minimum speed, maximum material quantity, and minimum material quantity are all preset. Multiply the speed difference by the first difference to obtain the first product; The ratio of the first product to the difference in material quantity is used as the change in the operating speed of the belt roaster; The operating speed of the belt roaster is adjusted according to the change.

[0009] Optionally, adjusting the operating speed of the belt roaster according to the change includes: The change is divided into multiple parts, and each part is taken as the adjustment amount of the running speed of the belt roaster.

[0010] Optionally, adjusting the operating speed of the roller screen of the belt roaster includes: The difference between the preset material thickness and the average material thickness of the trolley is obtained as the second difference value; Multiply the second difference by the maximum value of a single adjustment of the roller screen to obtain the second product; The ratio of the second product to a preset multiple of the preset material thickness fluctuation value is used as the increment of the operating speed of the roller screen; The operating speed of the roller screen is adjusted according to the increment.

[0011] Optionally, before adjusting the operating speeds of the belt roaster and the roller screen, the method further includes: The running speed will be adjusted after the preset delay time is waited.

[0012] Optionally, the step of pre-installing the green pellet flow meter above the wide belt includes: The green ball flow meter is installed on a support beam or portal frame above the wide belt; the portal frame is a device added to the wide belt when the support beam is not present.

[0013] Based on the above-mentioned method for stabilizing the amount of green pellets entering the machine, this application also discloses a device for stabilizing the amount of green pellets entering the machine, including: a flow calculation unit, an averaging unit, a judgment unit, a belt roaster adjustment unit, and a roller screen adjustment unit; The flow calculation unit is used to calculate the green pellet flow rate based on the cross-sectional area of ​​the green pellets located on the wide belt of the belt roaster and the running speed of the wide belt. The averaging unit is used to perform moving average processing on the green pellet flow rate and the trolley material thickness within the control cycle to obtain the average green pellet flow rate and the average trolley material thickness; the trolley material thickness is obtained through a preset material thickness detection. The judgment unit is used to determine whether the difference between the average value of the raw ball flow rate in two adjacent control cycles exceeds a preset flow fluctuation value. The belt roaster adjustment unit is used to adjust the operating speed of the belt roaster; The roller screen adjustment unit is used to adjust the running speed of the roller screen of the belt roaster when the difference between the average material thickness of the trolley and the preset material thickness exceeds the preset material thickness fluctuation value.

[0014] Optionally, the flow calculation unit includes: The mounting subunit is used to pre-install the green pellet flow meter above the wide belt; The acquisition subunit is used to acquire the cross-sectional area and the running speed of the wide belt through the green ball flow detector; The multiplication sub-unit is used to multiply the cross-sectional area, the running speed of the wide belt, and the bulk density of the green pellets to obtain the green pellet flow rate; the bulk density is a preset value.

[0015] Optionally, the acquisition subunit includes: The first distance acquisition subunit is used to acquire the distance y from the green ball flow detector to the material surface at the monitoring point; the monitoring point is a plurality of points preset on the wide belt, and the material surface is the top surface of the raw material at the monitoring point; The second distance acquisition subunit is used to acquire the distance x between the origin and the monitoring point, with the projection of the green ball flow meter on the wide belt as the origin; The material surface height calculation subunit is used to calculate the material surface height based on the height of the green ball flow meter from the wide belt, the distance y, and the distance x. An area calculation subunit is used to calculate the cross-sectional area based on the material surface height.

[0016] Optionally, the belt roaster adjustment unit includes: The first difference calculation subunit is used to obtain the difference between the average values ​​of the live pellet flow rate in two adjacent control cycles as the first difference. The difference acquisition subunit is used to acquire the speed difference between the maximum speed and the minimum speed of the trolley, and the material difference between the maximum material quantity and the minimum material quantity; the maximum speed, the minimum speed, the maximum material quantity, and the minimum material quantity are all obtained by preset; The first product calculation subunit is used to multiply the speed difference by the first difference to obtain the first product; The change acquisition subunit is used to take the ratio of the first product to the difference in material quantity as the change in the operating speed of the belt roaster; The belt roaster adjustment subunit is used to adjust the operating speed of the belt roaster according to the change.

[0017] Optionally, the belt roaster adjustment subunit includes: The batch adjustment subunit is used to divide the change into multiple parts, and each part is taken as the adjustment amount of the running speed of the belt roaster.

[0018] Optionally, the roller screen adjustment unit includes: The second difference calculation subunit is used to obtain the difference between the preset material thickness and the average material thickness of the trolley as the second difference; The second product calculation subunit is used to multiply the second difference by the maximum value of a single adjustment of the roller screen to obtain the second product; The incremental acquisition subunit is used to take the ratio of the second product to a preset multiple of the preset material thickness fluctuation value as the increment of the operating speed of the roller screen; The roller screen adjustment subunit is used to adjust the operating speed of the roller screen according to the increment.

[0019] Optionally, the device further includes: The waiting unit is used to adjust the running speed after waiting for a preset delay time.

[0020] Optionally, the mounting subunit includes: An additional subunit is added for mounting the green ball flow meter on a support beam or portal frame above the wide belt; the portal frame is a device added to the wide belt when the support beam is not present.

[0021] Based on the above-mentioned method for stabilizing the amount of live pellets entering the machine, this application also discloses a storage medium for storing computer program instructions, which, when executed by a central processing unit, are used to implement the steps of the above-mentioned method.

[0022] This application discloses a method, apparatus, and storage medium for stabilizing the green pellet feed rate. It involves real-time detection of the cross-sectional area of ​​the green pellets on the wide belt of a belt calciner, as well as the belt's operating speed, to calculate the green pellet flow rate. This allows for timely and accurate detection of abnormal fluctuations in the green pellet flow rate, providing data support for subsequent green pellet feed rate stabilization control. It also acquires the average green pellet flow rate and trolley material thickness within a cycle. When the difference between the average green pellet flow rate of two adjacent cycles is significant, the operating speed of the belt calciner is adjusted. When the difference between the average trolley material thickness and the preset material thickness is significant, the operating speed of the belt calciner's roller screen is adjusted. This enables graded control, with coordinated adjustment of the roller screen and belt calciner, balancing short-term buffering and long-term stability, maintaining a stable green pellet feed rate even when the green pellet flow rate fluctuates continuously or significantly. Furthermore, it replaces manual operation, improving both real-time control and stability, achieving timely and accurate stabilization of the green pellet feed rate, and further improving pellet quality. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1a This is a flowchart illustrating a method for maintaining a stable amount of raw pellets in an embodiment of this application. Figure 1b This is a schematic diagram of the installation of the green pellet flow meter disclosed in an embodiment of this application; Figure 2 This is a flowchart illustrating another method for stabilizing the amount of raw pellets entering the machine, as disclosed in an embodiment of this application. Figure 3 This is a schematic diagram of a device for stabilizing the amount of raw pellets entering the machine, as disclosed in an embodiment of this application. Detailed Implementation

[0025] In actual operation of a belt calciner, if the green pellet flow rate is too high while the calciner's operating speed remains constant, the material thickness on the trolley will be too high, causing the upper green pellets to be damaged by the scraper and preventing normal production. In this situation, manually adjusting the speed cannot accurately determine the duration and amplitude of the green pellet flow rate fluctuations; one can only increase the speed based on experience. When the green pellet flow rate drops, the excessively high speed will result in insufficient material thickness on the trolley, requiring manual speed reduction again to maintain the thickness. This manual adjustment method not only intensifies the workload for operators but also suffers from control lag, poor precision, and unstable results.

[0026] Controlling the operating speed of the roller screen can speed up or slow down the amount of green balls fed into the machine. However, the roller screen does not have the function of storing materials. If the flow rate of green balls on the wide belt of its upstream equipment continues to increase, the roller screen can only change the speed at which the green balls fall into the trolley of its downstream equipment in a short period of time. It is powerless to deal with long-term and large fluctuations in the flow rate of green balls.

[0027] Therefore, this application adaptively controls the speed of the belt roaster and the roller screen by detecting fluctuations in the green pellet flow rate, thereby stabilizing the green pellet feed rate and improving pelleting efficiency and pellet quality.

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Example 1: This application discloses a method for stabilizing the amount of raw pellets entering the machine.

[0030] For details, please refer to Figure 1a The method for stabilizing the amount of live pellets entering the machine disclosed in this embodiment includes the following steps: Step 101: Calculate the green ball flow rate based on the cross-sectional area of ​​the green balls located on the wide belt of the belt roaster and the running speed of the wide belt.

[0031] In this embodiment, the green pellet flow meter is first pre-installed on the support beam above the wide conveyor belt. As one feasible solution, it can be specifically as follows: Figure 1bAs shown, the green pellet flow meter a is installed at the center of the width W direction of the wide conveyor belt b, at a preset distance L (e.g., 2-4 meters) from the material drop point of the wide conveyor belt b (where the green pellets fall through the roller screen into the trolley c), and at a preset height (e.g., 1.5-2.5 meters) from the wide conveyor belt b. This height needs to be determined based on the actual working conditions. As another feasible solution, when there is no support beam, a portal frame of at least the preset height can be added to the wide conveyor belt, and the green pellet flow meter can be installed in the center of the portal frame.

[0032] In the method of this embodiment, the green pellet flow meter can specifically be composed of an area sensor, a speed sensor, and a calculation module. The area sensor is used to obtain the cross-sectional area of ​​the green pellet surface (top surface of the raw material) on the wide conveyor belt, the speed sensor is used to detect the running speed of the wide conveyor belt, and the calculation module is used to perform calculations of the cross-sectional area and the green pellet flow rate.

[0033] As a feasible solution, multiple monitoring points can be preset within the detection range of the green pellet flow meter according to actual needs. These monitoring points should be located on the material surface on the wide conveyor belt. Then, the green pellet flow meter is used to detect the distance y from itself to the material surface at the preset monitoring point. The location and number of monitoring points can be set according to actual needs; there are no specific limitations on the exact location and number of monitoring points, as long as y can be obtained.

[0034] In this embodiment, the projection of the green pellet flow meter onto the wide conveyor belt is taken as the origin. The distance x between the origin and the monitoring point is obtained. Based on the height H, distance y, and distance x of the green pellet flow meter from the wide conveyor belt, the material surface height is calculated. Specifically, the height H, distance y, and distance x form a right triangle. Therefore, the distance between the green pellet flow meter and the material surface can be calculated using the Pythagorean theorem. The material surface height is then obtained by subtracting the height H from the distance between the green pellet flow meter and the material surface.

[0035] For example, if 400 monitoring points are set up, then 400 distances y and 400 distances x are obtained, and the distance x of the nth monitoring point is... n The formula can be seen as follows: x n =2-0.01n (1) Then, the height of 400 material surfaces was calculated using a cyclic calculation formula, and this height was then plotted against the x-axis plane to form a 400-degree angle. A data array of 400. The entire cross-section is divided into 400 right trapezoids, each with a right angle length of 0.01. The final formula for calculating the cross-sectional area is as follows: (2) In the formula, S is the cross-sectional area, h ih represents the material surface height corresponding to the i-th monitoring point. i+1 This represents the material surface height corresponding to the (i+1)th monitoring point.

[0036] In the method of this embodiment, the cross-sectional area (unit: m²) is used. 2 The operating speed of the wide conveyor belt (in m / h) and the bulk density of the green pellets (in t / m³) 3 Multiplying these three values ​​yields the instantaneous flow rate of the raw pellets (in t / h). The bulk density is a preset constant, which can be set to 2.2.

[0037] Step 102: Perform moving average processing on the green pellet flow rate and trolley material thickness within the control cycle to obtain the average green pellet flow rate and the average trolley material thickness.

[0038] In the method of this embodiment, the trolley material thickness at multiple monitoring points can be obtained through conventional preset material thickness detection. The average value of the trolley material thickness at these multiple monitoring points can be obtained first, serving as the trolley material thickness for moving average processing. Subsequently, within a set control cycle, the instantaneous flow rate of the green pellets and the trolley material thickness are acquired multiple times, and moving average processing is performed on them respectively to obtain the average green pellet flow rate and average trolley material thickness within that control cycle. For example, the formula for calculating the average green pellet flow rate can be as follows: (3) In the formula, Q is the average number of live pellets, n is the number of times the pellets are collected, and q i Let be the instantaneous flow rate of the live ball obtained for the i-th time.

[0039] Step 103: Determine whether the difference between the average value of the live ball flow rate in two adjacent control cycles exceeds the preset flow fluctuation value.

[0040] In the method of this embodiment, at the moment the current control cycle ends, the difference between the average pellet flow rate during the current control cycle and the average pellet flow rate of the previous control cycle (i.e., two adjacent control cycles) is calculated to obtain a first difference value. When the absolute value of the first difference value exceeds a preset flow rate fluctuation value (e.g., 30 t / h), it can be determined that the pellet flow rate fluctuation is large.

[0041] Step 104: Adjust the operating speed of the belt roaster.

[0042] In the method of this embodiment, when the difference between the average green pellet flow rates of two adjacent control cycles exceeds a preset flow fluctuation value, controlling the speed of the roaster can stabilize the green pellet feed rate (i.e., the amount of material entering the trolley). As an feasible solution, the speed difference between the maximum and minimum operating speeds of the trolley, and the difference between the maximum and minimum material quantities of the trolley, are first obtained. The maximum and minimum operating speeds, maximum and minimum material quantities of the trolley can all be preset according to actual working requirements; the specific values ​​of these parameters are not limited here.

[0043] Multiply the speed difference mentioned above by the first difference to obtain the first product. Then, obtain the ratio of the first product to the material quantity difference, and use this as the change in the operating speed of the belt roaster. Finally, adjust the operating speed of the belt roaster based on this change. The calculation formula is as follows: (4) In the formula, Δv is the change in the operating speed of the belt roaster, v max For maximum speed, v min The minimum speed is given by e, where e is the first difference, and m is the minimum speed. max For maximum material quantity, m min This is the minimum material quantity.

[0044] For example, if the maximum speed is 3.3 m / min, the minimum speed is 2.7 m / min, the maximum material flow rate is 700 t / h, the minimum material flow rate is 400 t / h, and e=40, then according to the above formula, the change in the operating speed of the belt roaster is 0.08.

[0045] The change is divided into multiple parts, and each part is taken as the adjustment amount of the running speed of the belt roaster.

[0046] In the method of this embodiment, according to the actual working conditions, it takes a certain amount of time for the material on the wide belt to fall onto the trolley. Therefore, a delay time (such as 15 seconds) can be set so that the calculation is completed and the preset delay time is waited before the adjustment of the running speed of the belt roaster is performed. As an feasible solution, the delay time can be determined by a cage dropping test, that is, a marker (paper ball, small wood chip, etc.) is thrown at the end of the wide belt and the time is recorded until the marker enters the trolley. The time obtained is the delay time.

[0047] In the method of this embodiment, to avoid sudden changes in the operating speed of the belt roaster, the operating speed of the belt roaster can be adjusted in batches. For example, the change can be adjusted by one-fifth each time. After the control cycle ends, the operating speed of the belt roaster is adjusted in five batches. If the change is 5 m / min, the operating speed of the belt roaster is adjusted by 1 m / min in each batch, and the time interval between each batch adjustment can be set to 0.6. After five adjustments, the adjustment of the operating speed of the belt roaster ends.

[0048] In the method of this embodiment, the number of batches for adjustment and the adjustment frequency of each batch can be set according to actual needs. The adjustment amount of each batch can be the same or different. No specific limitations are imposed on the number of batches, adjustment frequency, or adjustment amount of each batch; the goal is simply to avoid sudden changes in the operating speed of the belt roaster.

[0049] Step 105: If the difference between the average material thickness of the trolley and the preset material thickness exceeds the preset material thickness fluctuation value, adjust the running speed of the roller screen of the belt roaster.

[0050] In this embodiment, if the difference between the average green ball flow rates of two adjacent control cycles does not exceed a preset flow rate fluctuation value, it can be determined that the fluctuation in the green ball flow rate is small. At this time, the difference between the preset material thickness and the average material thickness on the trolley can be obtained to get a second difference. When this second difference exceeds the preset material thickness fluctuation value, the fluctuation in the green ball feed rate can be reduced by the action of the roller screen, thereby reducing the impact on the material thickness on the trolley. First, the second difference is multiplied by the maximum value of a single adjustment of the roller screen to obtain a second product. This product can be preset according to actual working requirements, and its specific value is not limited here.

[0051] The second product is then compared with a preset multiple of the preset material thickness fluctuation value to obtain the increment of the roller screen's operating speed. Finally, the roller screen's operating speed is adjusted based on this increment. The calculation formula is as follows: (5) In the formula, Δr is the increment of the roller screen's operating speed, r max h represents the maximum value for a single adjustment. c For the preset material thickness, h t h represents the average thickness of the material on the trolley. d This is the preset material thickness fluctuation value.

[0052] In actual operation, if there are multiple sets of roller screens, the running speed of the multiple sets of roller screens will be adjusted synchronously. Similarly, after the calculation is completed, you can wait for the preset delay time before adjusting the running speed of the roller screen.

[0053] The method described in this embodiment provides two approaches to stabilizing the green pellet feed rate under different conditions. When the green pellet flow rate fluctuates significantly, the material thickness is stabilized by controlling the calciner speed. When the green pellet feed rate fluctuates less, the material thickness on the trolley is stabilized by controlling the roller screen speed. This solves the problems of frequent fluctuations in calciner speed and continuous fluctuations in green pellet flow rate on the roller screen, while also addressing the issues of lag and accuracy in manual control, thereby improving the quality of the finished pellets.

[0054] Example 2: This application discloses another method for stabilizing the amount of raw pellets entering the machine. Please refer to [link / reference]. Figure 2 This embodiment describes the process of stabilizing the amount of raw pellets entering the machine.

[0055] Step 201: Install a green ball flow meter above the wide belt of the belt roaster.

[0056] Step 202: Obtain the cross-sectional area of ​​the green balls on the wide belt and the running speed of the wide belt using a green ball flow meter.

[0057] Step 203: Calculate the green pellet flow rate based on the cross-sectional area, the running speed of the wide conveyor belt, and the bulk density of the green pellets.

[0058] Step 204: Obtain the difference between the average values ​​of the live pellet flow rate of two adjacent control cycles as the first difference value.

[0059] Step 205: Determine whether the first difference exceeds the preset flow fluctuation value. If yes, proceed to step 206. If no, proceed to step 210.

[0060] Step 206: Obtain the speed difference between the maximum speed and the minimum speed of the trolley, and the material difference between the maximum material quantity and the minimum material quantity.

[0061] Step 207: Multiply the speed difference with the first difference to obtain the first product.

[0062] Step 208: Obtain the ratio of the first product to the difference in material quantity to get the change in the operating speed of the belt roaster.

[0063] Step 209: After waiting for the preset delay time, adjust the running speed of the belt roaster in batches based on the change.

[0064] Step 210: Obtain the second difference value as the difference between the preset material thickness and the average material thickness of the trolley.

[0065] Step 211: Determine whether the second difference exceeds the preset material thickness fluctuation value. If yes, proceed to step 212. If no, return to step 202.

[0066] Step 212: Multiply the second difference by the maximum value of a single adjustment of the roller screen to obtain the second product.

[0067] Step 213: Obtain the ratio of the second product to the preset material thickness fluctuation value of the preset multiple, and get the increment of the roller screen's running speed.

[0068] Step 214: After waiting for the preset delay time, adjust the running speed of the roller screen based on the increment.

[0069] Based on the method for stabilizing the amount of green pellets entering the machine disclosed in the above embodiments, this embodiment correspondingly discloses a device for stabilizing the amount of green pellets entering the machine. Please refer to... Figure 3 The device for stabilizing the amount of raw pellets fed into the machine includes: a flow calculation unit 301, an averaging unit 302, a judgment unit 303, a belt roaster adjustment unit 304, and a roller screen adjustment unit 305. The flow calculation unit 301 is used to calculate the flow rate of green pellets based on the cross-sectional area of ​​the green pellets located on the wide belt of the belt roaster and the running speed of the wide belt. The averaging unit 302 is used to perform moving average processing on the green pellet flow rate and the trolley material thickness within the control cycle to obtain the average green pellet flow rate and the average trolley material thickness; the trolley material thickness is obtained through a preset material thickness detection. The judgment unit 303 is used to determine whether the difference between the average value of the raw ball flow rate in two adjacent control cycles exceeds a preset flow fluctuation value. The belt roaster adjustment unit 304 is used to adjust the operating speed of the belt roaster; The roller screen adjustment unit 305 is used to adjust the running speed of the roller screen of the belt roaster when the difference between the average material thickness of the trolley and the preset material thickness exceeds the preset material thickness fluctuation value.

[0070] Optionally, the flow calculation unit 301 includes: The mounting subunit is used to pre-install the green pellet flow meter above the wide belt; The acquisition subunit is used to acquire the cross-sectional area and the running speed of the wide belt through the green ball flow detector; The multiplication sub-unit is used to multiply the cross-sectional area, the running speed of the wide belt, and the bulk density of the green pellets to obtain the green pellet flow rate; the bulk density is a preset value.

[0071] Optionally, the acquisition subunit includes: The first distance acquisition subunit is used to acquire the distance y from the green ball flow detector to the material surface at the monitoring point; the monitoring point is a plurality of points preset on the wide belt, and the material surface is the top surface of the raw material at the monitoring point; The second distance acquisition subunit is used to acquire the distance x between the origin and the monitoring point, with the projection of the green ball flow meter on the wide belt as the origin; The material surface height calculation subunit is used to calculate the material surface height based on the height of the green ball flow meter from the wide belt, the distance y, and the distance x. An area calculation subunit is used to calculate the cross-sectional area based on the material surface height.

[0072] Optionally, the belt roaster adjustment unit 304 includes: The first difference calculation subunit is used to obtain the difference between the average values ​​of the live pellet flow rate in two adjacent control cycles as the first difference. The difference acquisition subunit is used to acquire the speed difference between the maximum speed and the minimum speed of the trolley, and the material difference between the maximum material quantity and the minimum material quantity; the maximum speed, the minimum speed, the maximum material quantity, and the minimum material quantity are all obtained by preset; The first product calculation subunit is used to multiply the speed difference by the first difference to obtain the first product; The change acquisition subunit is used to take the ratio of the first product to the difference in material quantity as the change in the operating speed of the belt roaster; The belt roaster adjustment subunit is used to adjust the operating speed of the belt roaster according to the change.

[0073] Optionally, the belt roaster adjustment subunit includes: The batch adjustment subunit is used to divide the change into multiple parts, and each part is taken as the adjustment amount of the running speed of the belt roaster.

[0074] Optionally, the roller screen adjustment unit 305 includes: The second difference calculation subunit is used to obtain the difference between the preset material thickness and the average material thickness of the trolley as the second difference; The second product calculation subunit is used to multiply the second difference by the maximum value of a single adjustment of the roller screen to obtain the second product; The incremental acquisition subunit is used to take the ratio of the second product to a preset multiple of the preset material thickness fluctuation value as the increment of the operating speed of the roller screen; The roller screen adjustment subunit is used to adjust the operating speed of the roller screen according to the increment.

[0075] Optionally, the device further includes: The waiting unit is used to adjust the running speed after waiting for a preset delay time.

[0076] Optionally, the mounting subunit includes: An additional subunit is added for mounting the green ball flow meter on a support beam or portal frame above the wide belt; the portal frame is a device added to the wide belt when the support beam is not present.

[0077] Based on the above-mentioned method for stabilizing the amount of live pellets entering the machine, this application also discloses a storage medium for storing computer program instructions, which, when executed by a central processing unit, are used to implement the steps of the above-mentioned method.

[0078] The embodiments in this specification are described in a progressive manner. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant details can be found in the method section.

[0079] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0080] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0081] The features described in the embodiments of this specification can be substituted for or combined with each other, so that those skilled in the art can implement or use this application.

[0082] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for stabilizing the amount of raw pellets fed into the machine, characterized in that, include: The green pellet flow rate is calculated based on the cross-sectional area of ​​the green pellets located on the wide belt of the belt roaster and the running speed of the wide belt. The green pellet flow rate and trolley material thickness within the control cycle are processed by moving average to obtain the average green pellet flow rate and the average trolley material thickness; the trolley material thickness is obtained through a preset material thickness detection. Determine whether the difference between the average value of the raw pellet flow rate in two adjacent control cycles exceeds a preset flow rate fluctuation value; If so, adjust the operating speed of the belt roaster; If not, and the difference between the average material thickness of the trolley and the preset material thickness exceeds the preset material thickness fluctuation value, adjust the running speed of the roller screen of the belt roaster.

2. The method according to claim 1, characterized in that, The calculation of green pellet flow rate based on the cross-sectional area of ​​the green pellets located on the wide belt of the belt calciner and the operating speed of the wide belt includes: The green pellet flow meter is pre-installed above the wide belt; The cross-sectional area and the running speed of the wide belt are obtained through the green pellet flow meter; The cross-sectional area, the running speed of the wide belt, and the bulk density of the green pellets are multiplied to obtain the green pellet flow rate; the bulk density is a preset value.

3. The method according to claim 2, characterized in that, The step of obtaining the cross-sectional area through the green pellet flow meter includes: The distance y from the green pellet flow meter to the material surface at the monitoring point is obtained; the monitoring point is a plurality of points preset on the wide belt, and the material surface is the top surface of the raw material at the monitoring point; Using the projection of the green pellet flow meter onto the wide belt as the origin, the distance x between the origin and the monitoring point is obtained; The material surface height is calculated based on the height of the green ball flow meter from the wide belt, the distance y, and the distance x. The cross-sectional area is calculated based on the material surface height.

4. The method according to claim 1, characterized in that, Adjusting the operating speed of the belt roaster includes: The difference between the average values ​​of the raw pellet flow rate in two adjacent control cycles is taken as the first difference. The speed difference between the maximum and minimum speeds of the trolley, and the material difference between the maximum and minimum material quantities are obtained; the maximum speed, minimum speed, maximum material quantity, and minimum material quantity are all preset. Multiply the speed difference by the first difference to obtain the first product; The ratio of the first product to the difference in material quantity is used as the change in the operating speed of the belt roaster; The operating speed of the belt roaster is adjusted according to the change.

5. The method according to claim 4, characterized in that, Adjusting the operating speed of the belt roaster according to the change includes: The change is divided into multiple parts, and each part is taken as the adjustment amount of the running speed of the belt roaster.

6. The method according to claim 1, characterized in that, Adjusting the operating speed of the roller screen of the belt roaster includes: The difference between the preset material thickness and the average material thickness of the trolley is obtained as the second difference value; Multiply the second difference by the maximum value of a single adjustment of the roller screen to obtain the second product; The ratio of the second product to a preset multiple of the preset material thickness fluctuation value is used as the increment of the operating speed of the roller screen; The operating speed of the roller screen is adjusted according to the increment.

7. The method according to any one of claims 1-6, characterized in that, Before adjusting the operating speeds of the belt roaster and the roller screen, the method further includes: The running speed will be adjusted after the preset delay time is waited.

8. The method according to claim 2, characterized in that, The step of pre-installing the green pellet flow meter above the wide belt includes: The green ball flow meter is installed on a support beam or portal frame above the wide belt; the portal frame is a device added to the wide belt when the support beam is not present.

9. A device for stabilizing the amount of green pellets fed into a machine, characterized in that, include: Flow calculation unit, averaging unit, judgment unit, belt roaster adjustment unit and roller screen adjustment unit; The flow calculation unit is used to calculate the green pellet flow rate based on the cross-sectional area of ​​the green pellets located on the wide belt of the belt roaster and the running speed of the wide belt. The averaging unit is used to perform moving average processing on the green pellet flow rate and the trolley material thickness within the control cycle to obtain the average green pellet flow rate and the average trolley material thickness; the trolley material thickness is obtained through a preset material thickness detection. The judgment unit is used to determine whether the difference between the average value of the raw ball flow rate in two adjacent control cycles exceeds a preset flow fluctuation value. The belt roaster adjustment unit is used to adjust the operating speed of the belt roaster; The roller screen adjustment unit is used to adjust the running speed of the roller screen of the belt roaster when the difference between the average material thickness of the trolley and the preset material thickness exceeds the preset material thickness fluctuation value.

10. A storage medium, characterized in that, Used to store computer program instructions, which, when executed by a central processing unit, are used to implement the steps of the method described in any one of claims 1-8.

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