Sintering waste heat utilization determination method, device, equipment, storage medium and program product

Abstract

The application provides a sintering waste heat utilization determination method, device, equipment, storage medium and program product. The first heat value of the sintering hot ore loaded on the target sintering trolley located at the tail of the sintering machine is obtained, the second heat value of the sintering hot ore loaded on the target sintering trolley which cannot be utilized after waste heat utilization is calculated, the difference between the first heat value and the second heat value is determined, the difference is taken as the total available heat value of the sintering hot ore, the utilization time length of the total available heat value of the sintering hot ore accepted by the circular cooler is determined, and the online effective heat power of the circular cooler corresponding to the sintering hot ore is obtained according to the total available heat value and the utilization time length. The online effective heat power can be used to analyze and evaluate many production factors such as waste heat utilization devices and sintering machine states. The sintering optimal production control mode which comprehensively considers the energy output factors can be found by correlating the sintering machine production.

Description

Technical Field

[0001] This invention relates to the field of sintering technology, and in particular to a method, apparatus, equipment, storage medium, and program product for determining the utilization of sintering waste heat. Background Technology

[0002] In steel sintering production, after the sinter is formed, it slides down the tail of the sintering machine, is crushed by a single-roll crusher, and then cooled in a cooling device (commonly an annular cooler or a belt cooler, with the same cooling mechanism; this application uses an annular cooler as an example). The average temperature of the sinter entering the annular cooler is around 700℃, and after being cooled to around 150℃, it enters the finished product granulation process. Figure 1 As shown.

[0003] like Figure 1 As shown, after the sinter is cooled, the conveyor belt of the subsequent finished product system can transport the sinter normally. Obviously, under the premise of simply meeting the sintering process requirements, when the average temperature of the sinter entering the annular cooler is low, the cooling air volume required for the cooling process is small, which can reduce the energy consumption of the cooling process. However, the sinter carries a large amount of heat, which is directly released into the atmosphere, resulting in both heat waste and environmental pollution. Therefore, modern sintering systems have installed waste heat recovery devices in the annular cooler cooling process. A schematic diagram of a common annular cooler waste heat recovery device is shown below. Figure 4 As shown:

[0004] like Figure 4 As shown, the high-temperature flue gas at the head of the annular cooler is sent to the heat exchanger to heat water and generate steam. The steam can be used to drive equipment or generate electricity. For the waste heat utilization device of the annular cooler, the total heat carried by the sintered hot ore entering the annular cooler per unit time can be regarded as the total thermal power input of the annular cooler. Obviously, the total thermal power input of the annular cooler is the key parameter for the control and regulation of the waste heat utilization device of the annular cooler, but there is currently no effective method to determine the total thermal power input of the annular cooler online.

[0005] In view of this, it is necessary to propose a method, apparatus, equipment, storage medium and process product for determining the utilization of sintering waste heat in order to solve or at least alleviate the above-mentioned defects. Summary of the Invention

[0006] The main objective of this invention is to provide a method, apparatus, equipment, storage medium, and program product for determining the utilization of sintering waste heat, so as to solve the technical problem that there is currently no effective method for determining the total thermal power input of an annular cooler online.

[0007] To achieve the above objectives, the present invention provides a method for determining the utilization of sintering waste heat, comprising the following steps:

[0008] S1, obtain the first heat value of the sintering hot ore loaded on the target sintering trolley located at the tail of the sintering machine;

[0009] S2, calculate the second unusable heat value carried by the hot sintering ore loaded on the target sintering trolley after waste heat utilization;

[0010] S3, determine the difference between the first heat value and the second heat value, and use the difference as the total usable heat value of the sintered hot ore;

[0011] S4, determine the utilization time of the total usable heat value of the sintered hot ore received by the annular cooler;

[0012] S5. The online effective thermal power of the annular cooler corresponding to the sintered hot ore is obtained based on the total available heat value and the utilization time.

[0013] Preferably, step S1 specifically includes the following steps:

[0014] S11, acquire the thermal imaging image of the tail section of the target sintering trolley, and extract the effective thermal imaging image of the sintering hot ore corresponding to the cross section.

[0015] S12, On the effective cross-sectional thermal imaging image, a two-dimensional plane coordinate system is established with the top surface of the bottom plate of the target sintering trolley as the x-axis and the outer wall of the first side plate of the target sintering trolley as the y-axis.

[0016] S13, In the two-dimensional plane coordinate system, the effective cross-sectional thermal imaging image is divided into n columns along the x-axis and m rows along the y-axis to obtain m*n cells;

[0017] S14, calculate the calorific value of the cuboid-shaped sinter corresponding to each cell, and then solve the sum of the calorific values ​​of the sinter corresponding to all cells to obtain the first calorific value of the sinter loaded on the target sintering trolley; wherein, the length of the cuboid-shaped sinter is along the running direction of the sintering machine.

[0018] Preferably, step S14 specifically includes the following steps:

[0019] Using formula E i,j =T i,j *C i,j *S i,j * ρ * W calculates the calorie value E of the cell corresponding to the i-th column and j-th row. i,j Among them, T i,j C represents the average temperature of the sinter in the cell corresponding to the i-th column and j-th row. i,j S represents the specific heat capacity of sinter corresponding to the average temperature of the sinter in the cell corresponding to the i-th column and j-th row. i,jLet ρ be the area of ​​the cell corresponding to the i-th column and j-th row, ρ be the specific gravity of the sinter, and W be the length of the sintering trolley along the running direction.

[0020] Using formula The first calorific value E of the sintering hot ore loaded on the target sintering trolley is obtained.

[0021] Preferably, step S2 specifically includes the following steps:

[0022] The formula E0 = M0 * C0 is used to calculate the second unusable heat value E0 carried by the hot sinter ore loaded on the target sintering trolley after waste heat utilization; where M0 is the mass of the hot sinter ore loaded on the target sintering trolley, and C0 is the specific heat capacity of the hot sinter ore when it is cooled to the preset economic waste heat utilization temperature T0.

[0023] Preferably, step S4 specifically includes the following steps:

[0024] Using formula The utilization time t1 is used to obtain the total usable heat value of the sintered hot ore received by the annular cooler; wherein, V Ti This represents the current sintering machine speed.

[0025] Preferably, step S5 specifically includes the following steps:

[0026] Using formula The online effective thermal power P of the annular cooler corresponding to the sintered hot ore was obtained. Ti .

[0027] The present invention also provides a device for determining the utilization of sintering waste heat, comprising:

[0028] The first calorific value acquisition unit is used to acquire the first calorific value of the sintering hot ore loaded on the target sintering trolley located at the tail of the sintering machine.

[0029] The second heat value acquisition unit is used to calculate the unusable second heat value carried by the sintered hot ore loaded on the target sintering trolley after waste heat utilization.

[0030] A total available heat value determination unit is used to determine the difference between the first heat value and the second heat value, and to use the difference as the total available heat value of the sintered hot ore;

[0031] The utilization duration determination unit is used to determine the utilization duration of the total usable heat value of the sintered hot ore received by the annular cooler;

[0032] An online effective thermal power calculation unit is used to obtain the online effective thermal power of the annular cooler corresponding to the sintering hot ore based on the total amount of usable heat and the utilization time.

[0033] The present invention also provides a device for determining the utilization of sintering waste heat, including a memory, a processor, and a program for determining the utilization of sintering waste heat stored in the memory and executable on the processor. When the processor executes the program for determining the utilization of sintering waste heat, it implements the steps of the method for determining the utilization of sintering waste heat as described above.

[0034] The present invention also provides a storage medium storing a sintering waste heat utilization determination program, which, when executed by a processor, implements the steps of the sintering waste heat utilization determination method as described above.

[0035] The present invention also provides a program product, the program product including a sintering waste heat utilization determination program, which, when executed by a processor, implements the steps of the sintering waste heat utilization determination method as described above.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] This application obtains the first calorific value of the sintered hot ore loaded on the target sintering trolley located at the tail of the sintering machine. Since the sintering process is continuous, each acquisition involves a different target sintering trolley located at the tail of the sintering machine, thus achieving online acquisition of calorific values ​​on a trolley-by-trolley basis. This ensures the acquired data is real-time and timely, and can dynamically reflect the entire sintering process. The application then calculates the second calorific value of the sintered hot ore loaded on the target sintering trolley, which is unusable after waste heat utilization, and determines the difference between the first and second calorific values ​​as the total usable calorific value of the sintered hot ore. Instead of blindly calculating all the heat carried by the sintering hot ore, this application calculates the total usable heat value as the actual effective value, thus ensuring the accuracy of the calculation results. Finally, based on the total usable heat value and the utilization time, the online effective thermal power of the annular cooler corresponding to the sintering hot ore is obtained. The online effective thermal power obtained from the energy flow level can reflect the heat data input from the sintering hot ore to the annular cooler, serving as a feedback indicator for sintering waste heat utilization. This data can be used to analyze and evaluate various production factors such as waste heat utilization devices and sintering machine status. It can also be correlated with sintering machine production to find the optimal sintering production control mode that integrates energy output factors. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 This is a process flow diagram of a sintering system in the existing technology;

[0040] Figure 2 This is a schematic diagram of sinter formation in existing technology;

[0041] Figure 3 This is a schematic diagram illustrating the working principle of an annular cooler in existing technology.

[0042] Figure 4 This is a schematic diagram of the waste heat recovery device of an existing ring cooler.

[0043] Figure 5 This is a schematic diagram illustrating the application scenario of the thermal imaging camera deployment at the tail of the sintering machine in one embodiment of the present invention.

[0044] Figure 6 This is a schematic diagram of an effective cross-sectional thermal imaging image according to an embodiment of the present invention;

[0045] Figure 7 This is a schematic diagram of an effective cross-sectional thermal imaging image after grid division in one embodiment of the present invention;

[0046] Figure 8 This is a schematic flowchart of one embodiment of the present invention.

[0047] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0050] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0051] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0052] Those skilled in the art should know that with the rapid development of modern industry, the scale of steel production is increasing, and energy consumption is also increasing. Energy conservation and environmental protection indicators are becoming increasingly important factors to consider in the steel production process. In steel production, iron-containing raw materials need to be processed by a sintering system before entering the blast furnace for smelting. That is, various powdered iron-containing raw materials are mixed with appropriate amounts of fuel (coal powder, coke powder) and flux, and an appropriate amount of water is added. After mixing and pelletizing, they are placed on a sintering trolley for roasting, causing a series of physicochemical changes to form easily smelted sinter. This process is called sintering.

[0053] The sintering system mainly includes several pieces of equipment such as a sintering trolley, a mixer, a main exhaust fan, and an annular cooler. See the sintering system process flow diagram. Figure 1 As shown: Various raw materials are proportioned in the batching room to form a mixture. This mixture is then fed into a mixer for homogenization and pelletizing. It is then evenly distributed onto the sintering trolley by a roller feeder and a nine-roller distributor to form a sintering mixture layer. The ignition fan and ignition blower start the ignition furnace, igniting the uppermost layer of the sintering mixture on the sintering trolley. The ignited combustion zone moves downwards, and the mixture passing through it is roasted into sintered ore. This is the sintering process. After sintering, the resulting sintered ore is crushed by a single-roller crusher and cooled by an annular cooler. Finally, it is screened and granulated before being sent to the blast furnace or finished ore bin. The oxygen required for the sintering process is provided by the main exhaust fan. Multiple vertically arranged bellows are located below the sintering trolley, and below the bellows is a horizontally placed large flue (or duct). The large flue is connected to the main exhaust fan, which generates negative pressure air through the large flue and bellows, providing combustion air for the sintering process.

[0054] Please refer to Figure 2 As shown, during the sintering process, the ignited combustion zone moves from top to bottom, and its movement speed is the vertical sintering speed. The sintering trolley moves from the head to the tail of the sintering machine, and its speed is the machine speed. When the combustion zone reaches the bottom of the mixture on the sintering trolley, the position of the sintering trolley relative to the head of the sintering machine marks the sintering endpoint. A schematic diagram of sinter formation is shown below. Figure 2 As shown:

[0055] like Figure 2 As shown, as the sintering trolley moves, the combustion zone gradually moves downward. The mixture passing through the combustion zone is roasted into sintered ore. During the sintering process, the material in the sintering trolley can be divided into the bottom material layer, the original material zone, the wet zone, the drying and preheating zone, the combustion zone, and the sintered ore zone from bottom to top. When the combustion zone moves to the bottom material layer, all the material in the sintering trolley has been roasted into sintered ore. The corresponding position at this time is the sintering endpoint position, which is generally indicated by the bellows number.

[0056] During the sintering process, the temperature of the combustion zone is ~1250℃. The heat generated by fuel combustion continuously accumulates in the mixed material layer below the sintering endpoint. The heat generated by fuel combustion heats the air passing through the sintering machine material layer (i.e., sintering flue gas). Before reaching the sintering endpoint, the flue gas temperature continues to rise. After the sintering endpoint, since there is no fuel available for continued combustion, the air passing through the sintering material layer is a cooling process. At this time, the sintering flue gas temperature begins to drop. Therefore, the sintering endpoint position can be detected by detecting the sintering flue gas temperature in the sintering air box.

[0057] Please see the appendix Figures 1 to 8 A method for determining the utilization of sintering waste heat in one embodiment of the present invention includes the following steps:

[0058] S1, obtain the first heat value of the sintering hot ore loaded on the target sintering trolley located at the tail of the sintering machine;

[0059] S2, calculate the second unusable heat value carried by the hot sintering ore loaded on the target sintering trolley after waste heat utilization;

[0060] S3, determine the difference between the first heat value and the second heat value, and use the difference as the total usable heat value of the sintered hot ore;

[0061] S4, determine the utilization time of the total usable heat value of the sintered hot ore received by the annular cooler;

[0062] S5. The online effective thermal power of the annular cooler corresponding to the sintered hot ore is obtained based on the total available heat value and the utilization time.

[0063] This application's solution obtains the first calorific value of the sintered hot ore loaded on the target sintering trolley located at the tail of the sintering machine. Since the sintering process is continuous, each acquisition involves a different target sintering trolley at the tail of the sintering machine, thus achieving online acquisition of calorific values ​​on a trolley-by-trolley basis. This ensures the acquired data is real-time and timely, and dynamically reflects the entire sintering process. The solution then calculates the second calorific value of the sintered hot ore loaded on the target sintering trolley, which is unusable after waste heat utilization, and determines the difference between the first and second calorific values ​​as the total usable calorific value of the sintered hot ore, rather than blindly performing subsequent calculations on all the calorific value carried by the sintered hot ore. Figure 4 As shown, after line B of the annular cooler, because the temperature of the sintered ore is lower than the preset economic waste heat utilization temperature T0, it will be released into the atmosphere. Therefore, the total usable heat value calculated in this application is the actual effective value, thereby ensuring the accuracy of the calculation results. Finally, based on the total usable heat value and the utilization time, the online effective thermal power of the annular cooler corresponding to the sintered hot ore is obtained. The online effective thermal power obtained from the energy flow level in this application can be used to reflect the heat data input from the sintered hot ore to the annular cooler. It can be used as the basis for evaluating the efficiency of the annular cooler waste heat utilization device and for adjusting and controlling the annular cooler waste heat utilization device.

[0064] In a preferred embodiment, step S1 specifically includes the following steps:

[0065] S11, acquire the thermal imaging image of the tail section of the target sintering trolley, and extract the effective thermal imaging image of the sintering hot ore corresponding to the cross section.

[0066] S12, On the effective cross-sectional thermal imaging image, a two-dimensional plane coordinate system is established with the top surface of the bottom plate of the target sintering trolley as the x-axis and the outer wall of the first side plate of the target sintering trolley as the y-axis.

[0067] S13, In the two-dimensional plane coordinate system, the effective cross-sectional thermal imaging image is divided into n columns along the x-axis and m rows along the y-axis to obtain m*n cells;

[0068] S14, calculate the calorific value of the cuboid-shaped sinter corresponding to each cell, and then solve the sum of the calorific values ​​of the sinter corresponding to all cells to obtain the first calorific value of the sinter loaded on the target sintering trolley; wherein, the length of the cuboid-shaped sinter is along the running direction of the sintering machine.

[0069] Specifically, this embodiment provides a specific scheme for obtaining the first calorific value. Please refer to the attached diagram. Figure 5As shown, when the last sintering trolley driven by the tail wheel of the sintering machine reaches the inclination angle A, the large sintered ore formed on the sintering trolley slides off the sintering machine. The large sintered ore that slides off is called a sinter cake. Obviously, the sinter cake slides off in units of trolleys. The length of a single sinter cake can be regarded as the same as the length of the sintering trolley along the running direction.

[0070] Obviously, the sinter sliding off the sintering machine is not continuous. Instead, when the tail car at the tail of the sintering machine is brought to a certain angle (less than angle A) by the tail wheel, the sinter on that sintering car separates from the large sinter on the sintering machine. When angle A is reached, the sinter on that sintering car slides down, is crushed by the single-roll crusher, and then enters the annular cooler. Traditionally, the sintering machine is considered a sinter production facility, but in this invention, it is considered an energy production facility. The energy in the sinter is carried by the high-temperature sinter. That is, when the sinter enters the annular cooler, it is not just the sinter entering the annular cooler; the energy carried by the sinter also enters the annular cooler (entering from the tail of the sintering machine via the single-roll crusher; this channel has a certain heat dissipation, which will consume some of the energy carried by the sinter). The amount of sinter is small, but the proportion is negligible in engineering (i.e., all the energy carried by the sinter enters the annular cooler). As mentioned earlier, the sinter slides down to the subsequent process one cart at a time. That is, after the sinter slides down from a cart, it must wait until the next cart is also brought to an inclination angle A by the tail wheel before the sinter on that cart will slide down. In other words, the sinter does not enter the subsequent unit continuously from the tail of the sintering machine, but slides down one cart at a time. For example, if the length of a sintering machine cart is 1m and the speed of the sintering machine is 1m / min, then the sinter produced by the sintering machine will slide down one cart of sinter every minute to enter the subsequent process. From the perspective of energy output, the sintering machine outputs the energy carried by one cart of sinter every minute.

[0071] Because the speed of the annular cooler is very low, the sinter will accumulate to a thickness of about 1.5m after entering the annular cooler. As the annular cooler moves, the sinter will gradually cool down (waste heat utilization is also a cooling method). The energy output of the annular cooler is continuous.

[0072] In this embodiment, a thermal imaging camera is installed at a suitable position at the tail of the sintering machine. The timing of the thermal imaging camera's shooting can be set by detecting the tilt angle of the sintering trolley and the vibration of the sintered cake falling, etc., to ensure that a complete thermal imaging image of the tail section is obtained. The thermal imaging image of the tail section obtained by the thermal imaging camera is the thermal imaging image of the tail section at the fracture point of the sintered ore between the last sintering trolley and the second to last sintering trolley. In other embodiments, a thermal imaging video device can also be installed at a suitable position at the tail of the sintering machine to obtain continuous video images of the tail working, and the thermal imaging image of the tail section can be cropped from the video images. Those skilled in the art can choose according to actual needs.

[0073] like Figure 6 As shown, Figure 6 To create a thermal map that uses different colors to distinguish temperatures in the effective cross-sectional thermal imaging image, it can be specifically divided into temperature zones 1, 2, 3, and 4. Each temperature zone has a different temperature range. The temperature value of each point on the sintering machine tail section can be obtained from the thermal imaging equipment. In this embodiment, the effective cross-sectional thermal imaging image is divided into n columns along the x-axis and m rows along the y-axis in the two-dimensional plane coordinate system to obtain m*n cells. Figure 7 As shown, each cell can be determined based on its row and column number. As mentioned above, the average temperature of any cell can be obtained.

[0074] Since the length W of the sintering trolley along the direction of the sintering machine, which corresponds to the length of the cuboid sinter, is known, the area of ​​each cell can also be obtained, and the specific gravity ρ of the sinter is known, taking the sinter hot ore loaded on a single sintering machine trolley as a unit, the sinter hot ore in each cell can be considered isothermal from head to tail (the temperature difference is very small); for example, if a thermal imaging image of the tail section is obtained, after processing the effective cross-sectional thermal imaging image, it is known that the average temperature of a certain cell is 500℃, and the current length of the sintering trolley along the direction of the sintering machine is 1000mm, then the length of the cuboid sinter is 1000mm. The strip-shaped sinter 1000mm before and after the cross-section of this cell is considered isothermal. Therefore, by solving the sum of the sinter calorific values ​​corresponding to all cells, the first calorific value of the sinter hot ore loaded on the target sintering trolley can be obtained.

[0075] This embodiment captures the temperature distribution image of the tail section of the sintering trolley using thermal imaging technology, and extracts the effective cross-sectional thermal imaging image by using image processing techniques (such as threshold segmentation and edge detection) to include only the effective area containing the hot sintering ore. This ensures that subsequent calculations are only performed on the sintering ore itself, improving the accuracy of the final result. It is important to note that grid density (m, n values) affects both computational accuracy and efficiency; finer grids improve accuracy but increase computational load, while coarser grids do the opposite. By using a coordinate system and grid partitioning, the unstructured thermal imaging data is transformed into a structured spatial grid, quantifying the spatial distribution of the sintering ore's heat. The two-dimensional thermal imaging data is mapped to a three-dimensional cuboid model, implicitly considering the heat distribution of the sintering ore along its length direction, avoiding the complexity of direct three-dimensional reconstruction. By calculating and accumulating individual cells, a balance is struck between computational efficiency and accuracy. In addition, the first calorific value directly reflects the thermal state of the sinter and can be used to monitor combustion efficiency, predict product quality, or serve as a feedback signal to adjust relevant process parameters (such as air volume and material layer thickness). Furthermore, cell-level calorific analysis can locate local overheated or underheated areas and can help diagnose abnormalities in the sintering process (such as uneven fuel distribution and poor permeability).

[0076] In a preferred embodiment, step S14 specifically includes the following steps:

[0077] Using formula E i,j =T i,j *C i,j *S i,j * ρ * W calculates the calorie value E of the cell corresponding to the i-th column and j-th row. i,j Unit: kJ; where T i,j The average temperature of the sinter in the cell corresponding to the i-th column and j-th row, in K and C. i,j This represents the specific heat capacity of sinter corresponding to the average temperature of the sinter in the cell corresponding to the i-th column and j-th row, in kJ / (kg·K), s. i,j This represents the area of ​​the cell corresponding to the i-th column and j-th row, in meters. 2 ρ is the specific gravity of the sinter, in kg / m³. 3 W represents the length of the sintering trolley along the running direction, in meters (m).

[0078] Using formula The first calorific value E of the sintering hot ore loaded on the target sintering trolley is obtained.

[0079] In a preferred embodiment, step S2 specifically includes the following steps:

[0080] The formula E0 = M0 * C0 is used to calculate the unusable second heat value E0 carried by the sintered hot ore loaded on the target sintering trolley after waste heat utilization. The unit is kJ. Where M0 is the mass of the sintered hot ore loaded on the target sintering trolley, the unit is kg, and C0 is the specific heat capacity of the sintered hot ore when it is cooled to the preset economic waste heat utilization temperature T0. For example, when the temperature is 393K, C0 is 0.715, the unit is kJ / (kg.K).

[0081] It is worth noting that, such as Figure 4 As shown, after the B line of the annular cooler, the sintered ore temperature is lower than the preset economic waste heat utilization temperature T0, and it will be released into the atmosphere. The preset economic waste heat utilization temperature T0 can be determined according to the actual situation of the project. For example, the preset economic waste heat utilization temperature T0 is 393K (120℃). Sintered ore below this temperature has no economic waste heat utilization value. Therefore, the second unusable heat value E0 carried by the hot sintered ore loaded on the target sintering trolley after waste heat utilization can be calculated by the formula E0=M0*C0.

[0082] Furthermore, step S4 specifically includes the following steps:

[0083] Using formula The utilization time t1 is used to obtain the total usable heat value of the sintered hot ore received by the annular cooler; wherein, V Ti The current sintering machine speed is expressed in m / s.

[0084] It should be noted that the hot sinter from the target sintering trolley is recovered and utilized by the waste heat recovery device after entering the annular cooler. As mentioned above, the sinter cake slides down in units of the sintering trolley. Under normal sintering conditions, the sintering process is continuous and the sintering machine speed can be approximated as uniform. Therefore, the annular cooler receives the hot sinter from one sintering trolley and recovers and utilizes the heat within a time period t1. After time period t1 ends, it receives the hot sinter from the next sintering trolley and recovers and utilizes the heat.

[0085] The energy output of sintering is pulsed. The hot sinter is delivered in trolleys, one trolley at a time, sliding through a single-roll crusher and into the annular cooler. The energy carried by the hot sinter is the input energy to the annular cooler. However, the energy output of the annular cooler is smoothed out because the thickness of the hot sinter inside the annular cooler is approximately 1.5m. Therefore, after obtaining the energy value carried by the sinter cake, this design considers the pulsed energy output of the sinter as a continuous energy output. t1 is also the interval between the sinter sliding. That is, every t1 time interval, one trolley of sinter (sinter cake) slides into the annular cooler; that is, every t1 time interval, the annular cooler receives the energy carried by one trolley of sinter. This energy is considered as a continuous energy input to the annular cooler within t1 time (the annular cooler's energy output is continuous).

[0086] Furthermore, step S5 specifically includes the following steps:

[0087] Using formula The online effective thermal power P of the annular cooler corresponding to the sintered hot ore was obtained. Ti , Unit: kW.

[0088] It is understandable that by combining the formulas above, we can obtain...

[0089] The present invention also provides a device for determining the utilization of sintering waste heat, comprising:

[0090] The first calorific value acquisition unit is used to acquire the first calorific value of the sintering hot ore loaded on the target sintering trolley located at the tail of the sintering machine.

[0091] The second heat value acquisition unit is used to calculate the unusable second heat value carried by the sintered hot ore loaded on the target sintering trolley after waste heat utilization.

[0092] A total available heat value determination unit is used to determine the difference between the first heat value and the second heat value, and to use the difference as the total available heat value of the sintered hot ore;

[0093] The utilization duration determination unit is used to determine the utilization duration of the total usable heat value of the sintered hot ore received by the annular cooler;

[0094] An online effective thermal power calculation unit is used to obtain the online effective thermal power of the annular cooler corresponding to the sintering hot ore based on the total amount of usable heat and the utilization time.

[0095] The present invention also provides a device for determining the utilization of sintering waste heat, including a memory, a processor, and a program for determining the utilization of sintering waste heat stored in the memory and executable on the processor. When the processor executes the program for determining the utilization of sintering waste heat, it implements the steps of the method for determining the utilization of sintering waste heat as described above.

[0096] The present invention also provides a storage medium storing a sintering waste heat utilization determination program, which, when executed by a processor, implements the steps of the sintering waste heat utilization determination method as described above.

[0097] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0098] The aforementioned computer-readable storage medium may be included in the sintering waste heat utilization determination device; or it may exist independently and not assembled into the sintering waste heat utilization determination device.

[0099] The present invention also provides a program product, the program product including a sintering waste heat utilization determination program, which, when executed by a processor, implements the steps of the sintering waste heat utilization determination method as described above.

[0100] The specific implementation of the computer program product of the present invention is basically the same as the embodiments of the above-described method for determining the utilization of sintering waste heat, and will not be repeated here.

[0101] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for determining the utilization of sintering waste heat, characterized in that, Includes the following steps: S1, obtain the first heat value of the sintering hot ore loaded on the target sintering trolley located at the tail of the sintering machine; S2, calculate the second unusable heat value carried by the hot sintering ore loaded on the target sintering trolley after waste heat utilization; S3, determine the difference between the first heat value and the second heat value, and use the difference as the total usable heat value of the sintered hot ore; S4, determine the utilization time of the total usable heat value of the sintered hot ore received by the annular cooler; S5. The online effective thermal power of the annular cooler corresponding to the sintered hot ore is obtained based on the total available heat value and the utilization time.

2. The method for determining the utilization of sintering waste heat according to claim 1, characterized in that, Step S1 specifically includes the following steps: S11, acquire the thermal imaging image of the tail section of the target sintering trolley, and extract the effective thermal imaging image of the sintering hot ore corresponding to the cross section. S12, On the effective cross-sectional thermal imaging image, a two-dimensional plane coordinate system is established with the top surface of the bottom plate of the target sintering trolley as the x-axis and the outer wall of the first side plate of the target sintering trolley as the y-axis. S13, In the two-dimensional plane coordinate system, the effective cross-sectional thermal imaging image is divided into n columns along the x-axis and m rows along the y-axis to obtain m*n cells; S14, calculate the calorific value of the cuboid-shaped sinter corresponding to each cell, and then solve the sum of the calorific values ​​of the sinter corresponding to all cells to obtain the first calorific value of the sinter loaded on the target sintering trolley; wherein, the length of the cuboid-shaped sinter is along the running direction of the sintering machine.

3. The method for determining the utilization of sintering waste heat according to claim 2, characterized in that, Step S14 specifically includes the following steps: Using formula E i,j =T i,j *C i,j *S i,j *ρ*W calculates the calorie value E of the cell corresponding to the i-th column and j-th row. i,j Among them, T i,j C represents the average temperature of the sinter in the cell corresponding to the i-th column and j-th row. i,j S represents the specific heat capacity of sinter corresponding to the average temperature of the sinter in the cell corresponding to the i-th column and j-th row. i,j Let ρ be the area of ​​the cell corresponding to the i-th column and j-th row, ρ be the specific gravity of the sinter, and W be the length of the sintering trolley along the running direction. Using formula The first calorific value E of the sintering hot ore loaded on the target sintering trolley is obtained.

4. The method for determining the utilization of sintering waste heat according to claim 2, characterized in that, Step S2 specifically includes the following steps: The formula E0 = M0 * C0 is used to calculate the second unusable heat value E0 carried by the hot sinter ore loaded on the target sintering trolley after waste heat utilization; where M0 is the mass of the hot sinter ore loaded on the target sintering trolley, and C0 is the specific heat capacity of the hot sinter ore when it is cooled to the preset economic waste heat utilization temperature T0.

5. The method for determining the utilization of sintering waste heat according to claim 4, characterized in that, Step S4 specifically includes the following steps: Using formula The utilization time t1 is used to obtain the total usable heat value of the sintered hot ore received by the annular cooler; wherein, V Ti This represents the current sintering machine speed.

6. The method for determining the utilization of sintering waste heat according to claim 5, characterized in that, Step S5 specifically includes the following steps: Using formula The online effective thermal power P of the annular cooler corresponding to the sintered hot ore was obtained. Ti .

7. A device for determining the utilization of sintering waste heat, characterized in that, include: The first calorific value acquisition unit is used to acquire the first calorific value of the sintering hot ore loaded on the target sintering trolley located at the tail of the sintering machine. The second heat value acquisition unit is used to calculate the unusable second heat value carried by the sintered hot ore loaded on the target sintering trolley after waste heat utilization. A total available heat value determination unit is used to determine the difference between the first heat value and the second heat value, and to use the difference as the total available heat value of the sintered hot ore; The utilization duration determination unit is used to determine the utilization duration of the total usable heat value of the sintered hot ore received by the annular cooler; An online effective thermal power calculation unit is used to obtain the online effective thermal power of the annular cooler corresponding to the sintering hot ore based on the total amount of usable heat and the utilization time.

8. A device for determining the utilization of sintering waste heat, characterized in that, The method includes a memory, a processor, and a sintering waste heat utilization determination program stored in the memory and executable on the processor, wherein the processor, when executing the sintering waste heat utilization determination program, implements the steps of the sintering waste heat utilization determination method as described in any one of claims 1 to 6.

9. A storage medium storing a sintering waste heat utilization determination program, characterized in that, When the sintering waste heat utilization determination program is executed by the processor, it implements the steps of the sintering waste heat utilization determination method as described in any one of claims 1 to 6.

10. A program product, characterized in that, The program product includes a sintering waste heat utilization determination program, which, when executed by a processor, implements the steps of the sintering waste heat utilization determination method as described in any one of claims 1 to 6.

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