High-temperature high-dust-content flue gas heat exchange method and equipment

Abstract

The invention discloses a high-temperature and high-dust-content flue gas heat exchange method and equipment, and the method comprises the steps: obtaining attribute data of a to-be-produced material, and determining a target smelting temperature of the to-be-produced material based on the attribute data and preset smelting data; the real-time smelting temperature of the to-be-produced material in the smelting process is obtained, and when the real-time smelting temperature is smaller than the target smelting temperature, the flue gas temperature corresponding to the real-time smelting temperature is obtained; when the flue gas temperature is larger than the preset emission temperature, the temperature difference value between the flue gas temperature and the preset emission temperature is calculated, and redundant heat is calculated according to the temperature difference value and the emission amount corresponding to the flue gas temperature; calculating the flow velocity of a cooling medium in the heat exchange system in the smelting process according to the excess heat; and when the real-time smelting temperature is larger than or equal to the target smelting temperature, the flow speed of a cooling medium in the heat exchange system in the smelting process is calculated based on the flue gas temperature corresponding to the real-time smelting temperature, the discharge amount corresponding to the flue gas temperature and the preset discharge temperature.

Description

Technical Field

[0001] This invention relates to the field of iron and steel smelting technology, and in particular to a method and equipment for heat exchange of high-temperature, high-dust-content flue gas. Background Technology

[0002] In existing technologies, the purification and heat exchange of high-temperature, high-dust-laden flue gas suffers from low efficiency. On the one hand, the fixed low-flow-rate cooling medium fails to fully utilize the heat of the flue gas, resulting in a significant waste of thermal energy. On the other hand, the fixed high-flow-rate cooling medium is prone to ineffective operation, especially in multi-stage heat exchange devices where the flue gas has already reached the emission temperature or completed heat recovery, making further heat exchange ineffective. On the other hand, the flow rate of the cooling medium cannot match the flue gas temperature, thus affecting the purification and heat exchange efficiency.

[0003] Meanwhile, the metal smelting process can often be divided into a preheating stage, a production stage, and a shutdown stage. Currently, the purification and heat exchange of high-temperature, high-dust flue gas only considers the production stage. In the preheating and shutdown stages, the same heat exchange methods as in the production stage are often used. Since the temperature changes are large in the preheating and shutdown stages, using the same heat exchange methods as in the production stage leads to insufficient heat exchange effect or ineffective heat exchange process, resulting in waste of resources. Summary of the Invention

[0004] Based on this, it is necessary to address the technical problem of poor flue gas heat exchange effect during the preheating and shutdown stages of metal smelting in existing technologies, and propose a high-temperature, high-dust flue gas heat exchange method and equipment.

[0005] In a first aspect, a method for heat exchange of high-temperature, high-dust-laden flue gas is provided, the method comprising: Acquire the property data of the material to be produced, and determine the target smelting temperature of the material to be produced based on the property data and preset smelting data; Obtain the real-time smelting temperature during the smelting process of the material to be produced; When the real-time smelting temperature is lower than the target smelting temperature, the flue gas temperature corresponding to the real-time smelting temperature is obtained; When the flue gas temperature is greater than the preset emission temperature, the temperature difference between the flue gas temperature and the preset emission temperature is calculated, and the excess heat is calculated based on the temperature difference and the emission amount corresponding to the flue gas temperature. The flow rate of the cooling medium in the heat exchange system during the smelting process is calculated based on the excess heat. When the flue gas temperature is less than or equal to the preset emission temperature, the flow rate of the cooling medium in the heat exchange device during the smelting process is controlled to be zero. When the real-time smelting temperature is greater than or equal to the target smelting temperature, the flow rate of the cooling medium in the heat exchange system during the smelting process is calculated based on the flue gas temperature corresponding to the real-time smelting temperature, the emission rate corresponding to the flue gas temperature, and the preset emission temperature.

[0006] Optionally, the step of acquiring the attribute data of the material to be produced and determining the target smelting temperature of the material to be produced based on the attribute data and preset smelting data includes: When the preset smelting data includes historical attribute data of different materials to be produced and smelting condition parameters corresponding to different historical attribute data, the functional relationship between the historical attribute data and the smelting condition parameters is calculated based on the historical attribute data and the smelting condition parameters. The smelting parameters of the material to be produced are determined based on the functional relationship. The target smelting temperature of the material to be produced is determined based on the smelting operating parameters.

[0007] Optionally, the step of determining the target smelting temperature of the material to be produced based on the smelting operating parameters includes: Obtain historical smelting parameters under different historical smelting conditions and historical smelting temperatures under different historical smelting parameters; A training set is constructed based on the historical smelting operating parameters and the historical smelting temperature. The training set is augmented using data augmentation techniques to obtain the target training set; The preset prediction model is trained using the target training set to obtain the trained prediction model; The target smelting temperature of the material to be produced is determined based on the smelting operating parameters and the trained prediction model.

[0008] Optionally, the step of calculating the flow rate of the cooling medium in the heat exchange system during the smelting process based on the excess heat includes: The flow rate of the cooling medium in the first-stage heat exchanger in the heat exchange system is determined based on the excess heat. When the flow rate of the cooling medium in the first-stage heat exchanger is greater than the flow rate threshold, the remaining heat of the high-temperature, high-dust-laden flue gas after passing through the first-stage heat exchanger is calculated according to the flow rate threshold. The flow rate of the cooling medium in the second-stage heat exchanger in the heat exchange system is calculated based on the residual heat of the high-temperature, high-dust-laden flue gas after passing through the first-stage heat exchanger. When the flow rate of the cooling medium in the second-stage heat exchanger is greater than the flow rate threshold, the remaining heat of the high-temperature, high-dust-laden flue gas after passing through the second-stage heat exchanger is calculated according to the flow rate threshold. The flow rate of the cooling medium in the third-stage heat exchanger in the heat exchange system is calculated based on the residual heat of the high-temperature, high-dust flue gas after passing through the second-stage heat exchanger, until the excess heat is recovered and the flow rate of the cooling medium in each heat exchanger does not exceed the flow rate threshold.

[0009] Optionally, the step of calculating the flow rate of the cooling medium in the heat exchange system during the smelting process based on the flue gas temperature corresponding to the real-time smelting temperature, the emission rate corresponding to the flue gas temperature, and the preset emission temperature when the real-time smelting temperature is greater than or equal to the target smelting temperature includes: The heat emission is calculated based on the flue gas temperature corresponding to the real-time smelting temperature and the emission amount corresponding to the flue gas temperature. The permissible heat emission is calculated based on the preset emission temperature and the emission amount corresponding to the flue gas temperature; Calculate the heat difference between the calculated heat emission and the permitted heat emission; The flow rate of the cooling medium in the heat exchange system during the smelting process is calculated based on the heat difference.

[0010] Optionally, the step of calculating the flow rate of the cooling medium in the heat exchange system during the smelting process based on the heat difference includes: Obtain the maximum heat exchange capacity of each stage of the heat exchange device in the heat exchange system during the smelting process; When the maximum heat exchange capacity of each heat exchange device in the heat exchange system is different, the maximum heat exchange capacity of each heat exchange device is accumulated sequentially according to the order in which the heat exchange devices come into contact with the same flue gas, until the sum of the accumulation is greater than the heat difference, and the number of accumulations is recorded as N. The flow rate of the cooling medium in the heat exchange system from the first stage heat exchange device to the (N-1)th stage heat exchange device is controlled to be the maximum flow rate corresponding to the maximum heat exchange capacity. The maximum heat exchange capacity from the first-stage heat exchanger to the (N-1)th-stage heat exchanger in the heat exchange system is accumulated to obtain the accumulated value. Calculate the target difference between the heat difference and the accumulated value; The flow rate of the cooling medium in the Nth stage heat exchanger within the heat exchange system is calculated based on the target difference.

[0011] Optionally, the step of calculating the flow rate of the cooling medium in the heat exchange system during the smelting process based on the heat difference includes: Obtain the maximum heat exchange capacity of each stage of the heat exchange device in the heat exchange system during the smelting process; When the maximum heat exchange capacity of each heat exchange device in the heat exchange system is the same, the heat difference is used as the dividend and the maximum heat exchange capacity is used as the divisor to calculate the result M and the remainder Q. The flow rate of the cooling medium in the heat exchange system from the first stage heat exchange device to the Mth stage heat exchange device is controlled to be the maximum flow rate corresponding to the maximum heat exchange capacity. The flow rate of the cooling medium in the (M+1)th stage heat exchanger within the heat exchange system is calculated based on the remainder Q.

[0012] On the other hand, this application provides a high-temperature, high-dust-content flue gas heat exchange device, the device comprising: The data acquisition module is used to acquire the attribute data of the material to be produced, and to determine the target smelting temperature of the material to be produced based on the attribute data and preset smelting data; and to acquire the real-time smelting temperature of the material to be produced during the smelting process. The first calculation module is used to: acquire the flue gas temperature corresponding to the real-time smelting temperature when the real-time smelting temperature is lower than the target smelting temperature; calculate the temperature difference between the flue gas temperature and the preset emission temperature when the flue gas temperature is higher than the preset emission temperature, and calculate excess heat based on the temperature difference and the emission amount corresponding to the flue gas temperature; calculate the flow rate of the cooling medium in the heat exchange system during the smelting process based on the excess heat; and control the flow rate of the cooling medium in the heat exchange device during the smelting process to zero when the flue gas temperature is less than or equal to the preset emission temperature. The second calculation module is used to calculate the flow rate of the cooling medium in the heat exchange system during the smelting process based on the flue gas temperature corresponding to the real-time smelting temperature, the emission amount corresponding to the flue gas temperature, and the preset emission temperature when the real-time smelting temperature is greater than or equal to the target smelting temperature.

[0013] Thirdly, a computer-readable storage medium is provided, which stores a computer program that, when executed by a processor, implements the steps of the above-described high-temperature, high-dust-content flue gas heat exchange method.

[0014] This application obtains attribute data of the material to be produced and determines the target smelting temperature of the material to be produced based on the attribute data and preset smelting data; obtains the real-time smelting temperature during the smelting process of the material to be produced; when the real-time smelting temperature is less than the target smelting temperature, obtains the flue gas temperature corresponding to the real-time smelting temperature; when the flue gas temperature is greater than the preset emission temperature, calculates the temperature difference between the flue gas temperature and the preset emission temperature, and calculates excess heat based on the temperature difference and the emission amount corresponding to the flue gas temperature; calculates the flow rate of the cooling medium in the heat exchange system during the smelting process based on the excess heat; when the flue gas temperature is less than or equal to the preset emission temperature, controls the flow rate of the cooling medium in the heat exchange device during the smelting process to zero; when the real-time smelting temperature is greater than or equal to the target smelting temperature, calculates the flow rate of the cooling medium in the heat exchange system during the smelting process based on the flue gas temperature corresponding to the real-time smelting temperature, the emission amount corresponding to the flue gas temperature, and the preset emission temperature. By acquiring the real-time smelting temperature during the smelting process of the material to be produced and matching the real-time smelting temperature with the target smelting temperature, targeted heat exchange can be performed in the preheating and stopping stages where the target smelting temperature is not met. This avoids ineffective heat exchange when heat exchange is not required in the preheating and / or stopping stages, and avoids heat exchange actions that exceed the heat exchange requirements in the preheating and / or stopping stages, thereby achieving precise control of the heat exchange process. Attached Figure Description

[0015] 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 these drawings without creative effort.

[0016] in: Figure 1 This is a flowchart of a high-temperature, high-dust-content flue gas heat exchange method in one embodiment; Figure 2 This is a structural block diagram of a high-temperature, high-dust-content flue gas heat exchange device in one embodiment; Figure 3 This is a structural block diagram of a computer device in one embodiment; Figure 4 This is a structural block diagram of a computer device in another embodiment. Detailed Implementation

[0017] 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 some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The present invention will now be described in detail through specific embodiments.

[0019] Please see Figure 1 As shown, Figure 1 A schematic flowchart of a high-temperature, high-dust-content flue gas heat exchange method provided in an embodiment of the present invention includes the following steps: S101. Obtain the attribute data of the material to be produced, and determine the target smelting temperature of the material to be produced based on the attribute data and preset smelting data. S102. Obtain the real-time smelting temperature during the smelting process of the material to be produced; S103. When the real-time smelting temperature is lower than the target smelting temperature, obtain the flue gas temperature corresponding to the real-time smelting temperature. S104. When the flue gas temperature is greater than the preset emission temperature, calculate the temperature difference between the flue gas temperature and the preset emission temperature, and calculate the excess heat based on the temperature difference and the emission amount corresponding to the flue gas temperature. S105. Calculate the flow rate of the cooling medium in the heat exchange system during the smelting process based on the excess heat. S106. When the flue gas temperature is less than or equal to the preset emission temperature, the flow rate of the cooling medium in the heat exchange device during the smelting process is controlled to be zero. S107. When the real-time smelting temperature is greater than or equal to the target smelting temperature, the flow rate of the cooling medium in the heat exchange system during the smelting process is calculated based on the flue gas temperature corresponding to the real-time smelting temperature, the emission rate corresponding to the flue gas temperature, and the preset emission temperature.

[0020] The process involves: acquiring attribute data of the material to be produced and determining the target smelting temperature based on the attribute data and preset smelting data; acquiring the real-time smelting temperature during the smelting process of the material to be produced; acquiring the flue gas temperature corresponding to the real-time smelting temperature when the real-time smelting temperature is lower than the target smelting temperature; calculating the temperature difference between the flue gas temperature and the preset emission temperature when the flue gas temperature is higher than the preset emission temperature, and calculating excess heat based on the temperature difference and the emission amount corresponding to the flue gas temperature; calculating the flow rate of the cooling medium in the heat exchange system during the smelting process based on the excess heat; controlling the flow rate of the cooling medium in the heat exchange device to zero when the flue gas temperature is less than or equal to the preset emission temperature; and calculating the flow rate of the cooling medium in the heat exchange system during the smelting process when the real-time smelting temperature is greater than or equal to the target smelting temperature based on the flue gas temperature corresponding to the real-time smelting temperature, the emission amount corresponding to the flue gas temperature, and the preset emission temperature. By acquiring the real-time smelting temperature during the smelting process of the material to be produced and matching the real-time smelting temperature with the target smelting temperature, targeted heat exchange can be performed in the preheating and stopping stages where the target smelting temperature is not met. This avoids ineffective heat exchange when heat exchange is not required in the preheating and / or stopping stages, and avoids heat exchange actions that exceed the heat exchange requirements in the preheating and / or stopping stages, thereby achieving precise control of the heat exchange process.

[0021] In one possible implementation, the step of acquiring the property data of the material to be produced and determining the target smelting temperature of the material to be produced based on the property data and preset smelting data includes: When the preset smelting data includes historical attribute data of different materials to be produced and smelting condition parameters corresponding to different historical attribute data, the functional relationship between the historical attribute data and the smelting condition parameters is calculated based on the historical attribute data and the smelting condition parameters. The smelting parameters of the material to be produced are determined based on the functional relationship. The target smelting temperature of the material to be produced is determined based on the smelting operating parameters.

[0022] For example, by organizing the data to determine the historical attribute data and the smelting condition parameters, the functional relationship between the historical attribute data and the smelting condition parameters can be calculated, thereby quickly obtaining the target smelting temperature of the material to be produced, which is not only based on smelting standards, making the determined target smelting temperature more accurate.

[0023] In one possible implementation, the step of determining the target smelting temperature of the material to be produced based on the smelting operating parameters includes: Obtain historical smelting parameters under different historical smelting conditions and historical smelting temperatures under different historical smelting parameters; A training set is constructed based on the historical smelting operating parameters and the historical smelting temperature. The training set is augmented using data augmentation techniques to obtain the target training set; The preset prediction model is trained using the target training set to obtain the trained prediction model; The target smelting temperature of the material to be produced is determined based on the smelting operating parameters and the trained prediction model.

[0024] For example, the preset prediction model is an algorithm model for prediction. By using the preset prediction model, the target smelting temperature of the material to be produced can be better predicted, thereby enabling better identification of the preheating stage and / or the stop stage, and thus targeted heat exchange can be carried out during the preheating stage and / or the stop stage.

[0025] In one possible implementation, the step of calculating the flow rate of the cooling medium in the heat exchange system during the smelting process based on the excess heat includes: The flow rate of the cooling medium in the first-stage heat exchanger in the heat exchange system is determined based on the excess heat. When the flow rate of the cooling medium in the first-stage heat exchanger is greater than the flow rate threshold, the remaining heat of the high-temperature, high-dust-laden flue gas after passing through the first-stage heat exchanger is calculated according to the flow rate threshold. The flow rate of the cooling medium in the second-stage heat exchanger in the heat exchange system is calculated based on the residual heat of the high-temperature, high-dust-laden flue gas after passing through the first-stage heat exchanger. When the flow rate of the cooling medium in the second-stage heat exchanger is greater than the flow rate threshold, the remaining heat of the high-temperature, high-dust-laden flue gas after passing through the second-stage heat exchanger is calculated according to the flow rate threshold. The flow rate of the cooling medium in the third-stage heat exchanger in the heat exchange system is calculated based on the residual heat of the high-temperature, high-dust flue gas after passing through the second-stage heat exchanger, until the excess heat is recovered and the flow rate of the cooling medium in each heat exchanger does not exceed the flow rate threshold.

[0026] For example, during the heat exchange process, the heat exchange devices should be used as little as possible, that is, the fewest heat exchange devices should be selected to complete the heat exchange process, thereby reducing the use of heat exchange devices, reducing energy consumption, and reducing the risk of damage to heat exchange devices.

[0027] In one possible implementation, the step of calculating the flow rate of the cooling medium in the heat exchange system during the smelting process, based on the flue gas temperature corresponding to the real-time smelting temperature, the emission rate corresponding to the flue gas temperature, and a preset emission temperature when the real-time smelting temperature is greater than or equal to the target smelting temperature, includes: The heat emission is calculated based on the flue gas temperature corresponding to the real-time smelting temperature and the emission amount corresponding to the flue gas temperature. The permissible heat emission is calculated based on the preset emission temperature and the emission amount corresponding to the flue gas temperature; Calculate the heat difference between the calculated heat emission and the permitted heat emission; The flow rate of the cooling medium in the heat exchange system during the smelting process is calculated based on the heat difference.

[0028] For example, taking steel smelting as an example, the target smelting temperature is much greater than the preset emission temperature. When the real-time smelting temperature is greater than or equal to the target smelting temperature, the flue gas temperature corresponding to the real-time smelting temperature will necessarily be much greater than the preset emission temperature. The heat emission is calculated based on the gas emission per unit time, and then the heat contained in the flue gas with the same gas emission and preset emission temperature (allowable heat emission) is determined. Therefore, the heat that needs to be absorbed (heat exchanged) is calculated (heat difference). The flow rate of the cooling medium in the heat exchange system during the smelting process is calculated based on the heat difference.

[0029] In one possible implementation, the step of calculating the flow rate of the cooling medium in the heat exchange system during the smelting process based on the heat difference includes: Obtain the maximum heat exchange capacity of each stage of the heat exchange device in the heat exchange system during the smelting process; When the maximum heat exchange capacity of each heat exchange device in the heat exchange system is different, the maximum heat exchange capacity of each heat exchange device is accumulated sequentially according to the order in which the heat exchange devices come into contact with the same flue gas, until the sum of the accumulation is greater than the heat difference, and the number of accumulations is recorded as N. The flow rate of the cooling medium in the heat exchange system from the first stage heat exchange device to the (N-1)th stage heat exchange device is controlled to be the maximum flow rate corresponding to the maximum heat exchange capacity. The maximum heat exchange capacity from the first-stage heat exchanger to the (N-1)th-stage heat exchanger in the heat exchange system is accumulated to obtain the accumulated value. Calculate the target difference between the heat difference and the accumulated value; The flow rate of the cooling medium in the Nth stage heat exchanger within the heat exchange system is calculated based on the target difference.

[0030] For example, the heat exchange system contains four stages of heat exchange devices. The maximum heat exchange capacity of the first stage heat exchange device is 1, the maximum heat exchange capacity of the second stage heat exchange device is 2, the maximum heat exchange capacity of the third stage heat exchange device is 3, and the maximum heat exchange capacity of the fourth stage heat exchange device is 4. The heat difference is 5. The sum of the maximum heat exchange capacity of the first stage heat exchange device, the maximum heat exchange capacity of the second stage heat exchange device, and the maximum heat exchange capacity of the third stage heat exchange device is 6, which is greater than 5. Therefore, N is 3. The flow rate of the cooling medium from the first stage heat exchange device to the second (N-1) stage heat exchange device in the heat exchange system is controlled to be the maximum flow rate corresponding to the maximum heat exchange capacity. The target difference between the heat difference and the accumulated value is calculated, that is, 5 - (1 + 2) = 2. Based on 2 (the target difference), the flow rate of the cooling medium of the third stage heat exchange device in the heat exchange system is calculated.

[0031] In one possible implementation, the step of calculating the flow rate of the cooling medium in the heat exchange system during the smelting process based on the heat difference includes: Obtain the maximum heat exchange capacity of each stage of the heat exchange device in the heat exchange system during the smelting process; When the maximum heat exchange capacity of each heat exchange device in the heat exchange system is the same, the heat difference is used as the dividend and the maximum heat exchange capacity is used as the divisor to calculate the result M and the remainder Q. The flow rate of the cooling medium in the heat exchange system from the first stage heat exchange device to the Mth stage heat exchange device is controlled to be the maximum flow rate corresponding to the maximum heat exchange capacity. The flow rate of the cooling medium in the (M+1)th stage heat exchanger within the heat exchange system is calculated based on the remainder Q.

[0032] For example, the maximum heat exchange capacity of each heat exchange device in the heat exchange system is the same and is 3. The heat difference is 10. Then the result is M=3 and remainder Q=1. The flow rate of the cooling medium in the heat exchange system from the first heat exchange device to the third (M) heat exchange device is controlled to be the maximum flow rate corresponding to the maximum heat exchange capacity. The flow rate of the cooling medium in the fourth (M+1) heat exchange device in the heat exchange system is calculated based on the remainder 1 (Q).

[0033] On the other hand, such as Figure 2 As shown, this application provides a high-temperature, high-dust-content flue gas heat exchange device, the device comprising: The data acquisition module 201 is used to acquire the attribute data of the material to be produced, and to determine the target smelting temperature of the material to be produced based on the attribute data and preset smelting data; and to acquire the real-time smelting temperature of the material to be produced during the smelting process. The first calculation module 202 is used to: acquire the flue gas temperature corresponding to the real-time smelting temperature when the real-time smelting temperature is less than the target smelting temperature; calculate the temperature difference between the flue gas temperature and the preset emission temperature when the flue gas temperature is greater than the preset emission temperature, and calculate excess heat based on the temperature difference and the emission amount corresponding to the flue gas temperature; calculate the flow rate of the cooling medium in the heat exchange system during the smelting process based on the excess heat; and control the flow rate of the cooling medium in the heat exchange device during the smelting process to zero when the flue gas temperature is less than or equal to the preset emission temperature. The second calculation module 203 is used to calculate the flow rate of the cooling medium in the heat exchange system during the smelting process based on the flue gas temperature corresponding to the real-time smelting temperature, the emission amount corresponding to the flue gas temperature, and the preset emission temperature when the real-time smelting temperature is greater than or equal to the target smelting temperature.

[0034] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 4 As shown. The computer device includes a processor, memory, network interface, and database connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile and / or volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface is used for communication with external clients via a network connection. When the computer program is executed by the processor, it implements the functions or steps of a high-temperature, high-dust-content flue gas heat exchange method on the server side.

[0035] In one embodiment, a computer device is provided, which may be a client, and its internal structure diagram may be as follows: Figure 3 As shown, the computer device includes a processor, memory, network interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The network interface is used to communicate with an external server via a network connection. When the computer program is executed by the processor, it implements the functions or steps on the client side of a high-temperature, high-dust-content flue gas heat exchange method.

[0036] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it performs the following steps: acquiring smelting data of a material to be produced, and determining, based on the smelting data, the flue gas temperature of the high-temperature, high-dust-laden flue gas generated during the smelting of the material to be produced, and the exhaust volume of the high-temperature, high-dust-laden flue gas per unit time; further calculating, based on the exhaust volume and the flue gas temperature, the heat discharge per unit time during the smelting of the material to be produced, the smelting data including dimensional data and composition data; determining, based on the heat discharge and the required heat per unit time, an operating mode of a heat exchange system for the high-temperature, high-dust-laden flue gas, the heat exchange system having multiple stages of heat exchange devices; when the operating mode of the heat exchange system is a first mode, determining, based on the heat discharge, the cooling medium in the first stage heat exchange device of the heat exchange system. The flow rate of the first-stage heat exchanger is the first heat exchanger in the heat exchange system to contact the high-temperature, dust-laden flue gas and exchange heat with it. When the operating mode of the heat exchange system is the second mode, the flow rate of the cooling medium in the first-stage heat exchanger is determined based on the required heat, and the remaining heat of the high-temperature, dust-laden flue gas after passing through the first-stage heat exchanger is obtained. The flow rate of the cooling medium in the second-stage heat exchanger in the heat exchange system is set as a flow rate threshold, and the remaining heat of the high-temperature, dust-laden flue gas after passing through the second-stage heat exchanger is obtained. Based on the remaining heat, the flow rate of the cooling medium in the second-stage heat exchanger in the heat exchange system is adjusted by the ratio of the flow rate of the cooling medium in the third-stage heat exchanger in the heat exchange system until the high-temperature, dust-laden flue gas does not exceed the preset temperature. The second-stage heat exchanger is the first heat exchanger after the first-stage heat exchanger to contact the high-temperature, dust-laden flue gas and exchange heat with it.

[0037] In one embodiment, a computer-readable storage medium is provided, the computer-readable storage medium storing a computer program, which, when executed by a processor, performs the following steps: acquiring vibration velocity signals of absorbing mortar-anchor bolts in different directions; acquiring smelting data of the material to be produced, and determining, based on the smelting data, the flue gas temperature of the high-temperature, high-dust-laden flue gas generated during the smelting of the material to be produced, and the exhaust volume of the high-temperature, high-dust-laden flue gas per unit time, and further calculating, based on the exhaust volume and the flue gas temperature, the heat discharge per unit time during the smelting of the material to be produced, the smelting data including dimensional data and composition data; determining, based on the heat discharge and the required heat per unit time, the operating mode of a heat exchange system for the high-temperature, high-dust-laden flue gas, the heat exchange system having multi-stage heat exchange devices; when the operating mode of the heat exchange system is a first mode, determining, based on the heat discharge, the heat discharge in the first-stage heat exchange device of the heat exchange system... The flow rate of the cooling medium is as follows: the first-stage heat exchanger is the heat exchanger that first contacts the high-temperature, dust-laden flue gas and exchanges heat with it in the heat exchange system; when the operating mode of the heat exchange system is the second mode, the flow rate of the cooling medium in the first-stage heat exchanger is determined based on the required heat, and the remaining heat of the high-temperature, dust-laden flue gas after passing through the first-stage heat exchanger is obtained; the flow rate of the cooling medium in the second-stage heat exchanger is set as a flow rate threshold, and the remaining heat of the high-temperature, dust-laden flue gas after passing through the second-stage heat exchanger is obtained, and the flow rate of the cooling medium in the second-stage heat exchanger is adjusted based on the remaining heat until the high-temperature, dust-laden flue gas does not exceed the preset temperature. The second-stage heat exchanger is the heat exchanger that first contacts the high-temperature, dust-laden flue gas after the first-stage heat exchanger and exchanges heat with it.

[0038] It should be noted that the functions or steps that can be implemented by the computer-readable storage medium or computer device described above can be referred to the relevant descriptions on the server side and client side in the foregoing method embodiments. To avoid repetition, they will not be described one by one here.

[0039] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0040] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0041] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A method for heat exchange of high-temperature high-dust flue gas, characterized in that, The method comprises: acquiring attribute data of a material to be produced, and determining a target smelting temperature of the material to be produced based on the attribute data and preset smelting data; acquiring a real-time smelting temperature in a smelting process of the material to be produced; when the real-time smelting temperature is less than the target smelting temperature, acquiring a flue gas temperature corresponding to the real-time smelting temperature; when the flue gas temperature is greater than a preset discharge temperature, calculating a temperature difference between the flue gas temperature and the preset discharge temperature, and calculating excess heat according to the temperature difference and a discharge amount corresponding to the flue gas temperature; calculating a flow rate of a cooling medium in a heat exchange system in the smelting process according to the excess heat; when the flue gas temperature is less than or equal to the preset discharge temperature, controlling the flow rate of the cooling medium in the heat exchange device in the smelting process to be zero; when the real-time smelting temperature is greater than or equal to the target smelting temperature, calculating the flow rate of the cooling medium in the heat exchange system in the smelting process based on a flue gas temperature corresponding to the real-time smelting temperature, a discharge amount corresponding to the flue gas temperature, and a preset discharge temperature.

2. The high temperature, high dust containing flue gas heat exchanging method according to claim 1, characterized in that, The step of acquiring attribute data of a material to be produced, and determining a target smelting temperature of the material to be produced based on the attribute data and preset smelting data, comprises: when the preset smelting data comprises historical attribute data of different materials to be produced and smelting condition parameters corresponding to the different historical attribute data, calculating a functional relationship between the historical attribute data and the smelting condition parameters based on the historical attribute data and the smelting condition parameters; determining smelting condition parameters of the material to be produced according to the functional relationship and the functional relationship; determining the target smelting temperature of the material to be produced based on the smelting condition parameters.

3. The high temperature, high dust containing flue gas heat exchanging method according to claim 2, characterized in that, The step of determining the target smelting temperature of the material to be produced based on the smelting condition parameters, comprises: acquiring different historical smelting condition parameters and historical smelting temperatures at different historical smelting condition parameters; constructing a training set according to the historical smelting condition parameters and the historical smelting temperatures; expanding the training set through a data enhancement technology to obtain a target training set; training a preset prediction model through the target training set to obtain a trained prediction model; determining the target smelting temperature of the material to be produced based on the smelting condition parameters and the trained prediction model.

4. The high temperature, high dust containing flue gas heat exchanging method as claimed in claim 1, wherein, The step of calculating a flow rate of a cooling medium in a heat exchange system in the smelting process according to the excess heat, comprises: determining the flow rate of the cooling medium in a first-stage heat exchange device in the heat exchange system based on the excess heat; when the flow rate of the cooling medium in the first-stage heat exchange device is greater than a flow rate threshold, calculating a residual heat of high-temperature high-dust flue gas after passing through the first-stage heat exchange device according to the flow rate threshold; calculating the flow rate of the cooling medium in a second-stage heat exchange device in the heat exchange system based on the residual heat of the high-temperature high-dust flue gas after passing through the first-stage heat exchange device; when the flow rate of the cooling medium in the second-stage heat exchange device is greater than a flow rate threshold, calculating a residual heat of high-temperature high-dust flue gas after passing through the second-stage heat exchange device according to the flow rate threshold; The flow rate of the cooling medium in the third heat exchange device in the heat exchange system is calculated based on the residual heat of the high-temperature high-dust-containing flue gas after passing through the second heat exchange device until the excess heat is recovered, and the flow rate of the cooling medium in each heat exchange device does not exceed the flow rate threshold.

5. The high temperature, high dust containing flue gas heat exchange method of claim 1, wherein, When the real-time smelting temperature is greater than or equal to the target smelting temperature, the flow rate of the cooling medium in the heat exchange system during the smelting process is calculated based on the flue gas temperature corresponding to the real-time smelting temperature, the emission corresponding to the flue gas temperature, and a preset emission temperature, and the step comprises: calculating the heat emission based on the flue gas temperature corresponding to the real-time smelting temperature and the emission corresponding to the flue gas temperature; calculating the heat permitted emission based on the preset emission temperature and the emission corresponding to the flue gas temperature; calculating the heat difference between the calculated heat emission and the heat permitted emission; calculating the flow rate of the cooling medium in the heat exchange system during the smelting process according to the heat difference.

6. The high temperature, high dust containing flue gas heat exchanging method as claimed in claim 1, wherein, The step of calculating the flow rate of the cooling medium in the heat exchange system during the smelting process according to the heat difference comprises: obtaining the maximum heat exchange capacity of each heat exchange device in the heat exchange system during the smelting process; when the maximum heat exchange capacities of the heat exchange devices in the heat exchange system are different, the maximum heat exchange capacities of the heat exchange devices are sequentially added in the order of the heat exchange devices contacting the same flue gas until the sum of the additions is greater than the heat difference, and the number of additions is recorded as N; controlling the flow rate of the cooling medium of the first heat exchange device to the N-1 heat exchange device in the heat exchange system to be the maximum flow rate corresponding to the maximum heat exchange capacity; adding the maximum heat exchange capacities of the first heat exchange device to the N-1 heat exchange device in the heat exchange system to obtain an addition value; calculating a target difference between the heat difference and the addition value; calculating the flow rate of the cooling medium of the N heat exchange device in the heat exchange system based on the target difference.

7. The high temperature, high dust containing flue gas heat exchanging method as claimed in claim 1, wherein, The step of calculating the flow rate of the cooling medium in the heat exchange system during the smelting process according to the heat difference comprises: obtaining the maximum heat exchange capacity of each heat exchange device in the heat exchange system during the smelting process; when the maximum heat exchange capacities of the heat exchange devices in the heat exchange system are the same, the heat difference is taken as the dividend and the maximum heat exchange capacity is taken as the divisor to calculate the result M and the remainder Q; controlling the flow rate of the cooling medium of the first heat exchange device to the M heat exchange device in the heat exchange system to be the maximum flow rate corresponding to the maximum heat exchange capacity; calculating the flow rate of the cooling medium of the M+1 heat exchange device in the heat exchange system based on the remainder Q.

8. A high-temperature high-dust-containing flue gas heat exchanging device, characterized in that, The device comprises: a data acquisition module configured to obtain attribute data of a material to be produced, and determine a target smelting temperature of the material to be produced based on the attribute data and preset smelting data; and obtain a real-time smelting temperature during a smelting process of the material to be produced. The first calculation module is configured to: when the real-time smelting temperature is less than the target smelting temperature, obtain a flue gas temperature corresponding to the real-time smelting temperature; when the flue gas temperature is greater than a preset discharge temperature, calculate a temperature difference between the flue gas temperature and the preset discharge temperature, and calculate excess heat according to the temperature difference and an emission amount corresponding to the flue gas temperature; calculate a flow rate of a cooling medium in a heat exchange system in the smelting process according to the excess heat; and when the flue gas temperature is less than or equal to the preset discharge temperature, control the flow rate of the cooling medium in the heat exchange device in the smelting process to be zero. The second calculation module is configured to: when the real-time smelting temperature is greater than or equal to the target smelting temperature, calculate a flow rate of a cooling medium in a heat exchange system in the smelting process based on a flue gas temperature corresponding to the real-time smelting temperature, an emission amount corresponding to the flue gas temperature, and a preset discharge temperature.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the steps of the high-temperature high-dust-containing flue gas heat exchange method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 9. The computer program is executed by the processor to implement the steps of the high-temperature high-dust-containing flue gas heat exchange method according to any one of claims 1 to 7.

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