Cleaning method for shaft kiln nodules and related equipment

Abstract

The invention discloses a shaft kiln nodule cleaning method and related equipment, and relates to the technical field of in-kiln nodule treatment, the method comprises the steps that monitoring parameters in a shaft kiln are obtained, and the monitoring parameters comprise the kiln top temperature, the dust removal inlet temperature, the oxygen content, the kiln top flame state and the ash discharge temperature; and based on the change condition of the monitoring parameters, the material treatment process is dynamically adjusted so as to optimize the nodule cleaning process and maintain normal production and operation of the shaft kiln, and the material treatment process comprises the ash discharge frequency and the material distribution mode. The limitation of a traditional cleaning mode is effectively avoided, optimization of the nodule cleaning process is achieved, the nodule problem can be solved in time on the premise that normal production operation in the kiln is not affected, the shutdown cleaning frequency is reduced, and the production efficiency and stability of the shaft kiln are improved.

Description

Technical Field

[0001] This application relates to the technical field of dealing with nodulation in kilns, and particularly to a method for cleaning nodulation in a shaft kiln and related equipment. Background Art

[0002] A shaft kiln is an important equipment widely used in industries such as cement, lime, and metal smelting, with characteristics such as high-temperature calcination and strong material connectivity. However, during long-term operation, nodulation often occurs in the shaft kiln. Nodulation refers to the adhesion and formation of lumps of materials in certain areas of the shaft kiln due to long-term material accumulation or reasons such as temperature. These nodules not only affect the normal flow of materials in the kiln but may also cause problems such as uneven temperature and poor air flow in the kiln, further leading to a decrease in production efficiency and an increase in energy consumption.

[0003] Currently, the methods for cleaning nodulation in shaft kilns mainly rely on manual inspection or regular mechanical intervention. These traditional methods are usually inefficient and cannot precisely control the cleaning process, resulting in unstable air flow and temperature distribution in the kiln. Therefore, there is an urgent need for a method for cleaning nodulation in shaft kilns to solve the above-mentioned problems. Summary of the Invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further elaborated in the Detailed Description section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0005] In a first aspect, this application provides a method for cleaning nodulation in a shaft kiln, including:

[0006] Obtaining monitoring parameters in the shaft kiln, where the monitoring parameters include kiln top temperature, dust removal inlet temperature, oxygen content, kiln top flame state, and ash discharge temperature;

[0007] Based on the changes in the monitoring parameters, dynamically adjusting the material processing flow to optimize the nodulation cleaning process and maintain the normal production operation of the shaft kiln, where the material processing flow includes ash discharge frequency and feeding method.

[0008] In some embodiments, it further includes:

[0009] When it is detected that the kiln top temperature reaches a first preset threshold and the dust removal inlet temperature reaches a second preset threshold, stop coal feeding and charging into the shaft kiln;

[0010] Based on the nodulation situation in the shaft kiln, start continuously adding or intermittently adding a preset number of buckets of cold material without coal addition into the shaft kiln, where the preset number of buckets is 6, and each bucket contains 1.5 tons of stones;

[0011] After the addition of cold materials without coal blending is completed, resume the coal blending and feeding into the shaft kiln.

[0012] In some embodiments, it further includes:

[0013] During the addition of cold materials without coal blending, based on the particle size of the cold materials without coal blending, control the rotation direction of the feed trough. Specifically, when the particle size is relatively large, control the feed trough to rotate in the positive direction, where the positive direction is the clockwise direction when observing the distributor from the top of the kiln; when the particle size is relatively small, control the feed trough to rotate in the reverse direction, where the reverse direction is the counterclockwise direction when observing the distributor from the top of the kiln.

[0014] In some embodiments, it further includes:

[0015] Based on the flame state at the top of the kiln, dynamically adjust the operating frequencies of the blower and the induced draft fan.

[0016] In some embodiments, it further includes:

[0017] Based on the oxygen content, dynamically adjust the operating frequencies of the blower and the induced draft fan; and,

[0018] Adjust the ash discharge frequency and the sealing state of the two-stage valve to control the oxygen content within a preset content range, where the two-stage valve includes an upper valve and a lower valve.

[0019] In some embodiments, it further includes:

[0020] When the difference between the ash discharge temperature and the maximum tolerable temperature of the belt conveyor is greater than a preset temperature threshold, increase the ash discharge frequency.

[0021] In some embodiments, it further includes: Based on the production load situation, adjust the coal blending hopper number frequency to a preset frequency range and perform clockwise distribution;

[0022] After every preset number of days, perform counterclockwise distribution for a preset time;

[0023] After performing counterclockwise distribution for the preset time, resume clockwise distribution.

[0024] In a second aspect, the present application provides a device for cleaning nodulation in a shaft kiln, including:

[0025] A parameter acquisition unit, configured to acquire monitoring parameters in the shaft kiln, where the monitoring parameters include the temperature at the top of the kiln, the temperature at the dust removal inlet, the oxygen content, the flame state at the top of the kiln, and the ash discharge temperature;

[0026] A material processing unit, configured to dynamically adjust the material processing flow based on the change of the monitoring parameters, so as to optimize the nodulation cleaning process and maintain the normal production operation of the shaft kiln, where the material processing flow includes the ash discharge frequency and the distribution method.

[0027] In a third aspect, an electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor is configured to implement the steps of the method for cleaning nodulation in a shaft kiln according to any one of the first aspects when executing the computer program stored in the memory.

[0028] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon. The computer program, when executed by a processor, implements the method for cleaning nodulation in a shaft kiln according to any one of the first aspects.

[0029] In summary, the present application obtains various monitoring parameters in the shaft kiln in real time (such as top temperature of the kiln, temperature at the dust removal inlet, oxygen content, etc.), and dynamically adjusts the material handling process (such as ash discharge frequency and feeding method) based on the changes in these parameters, thereby achieving precise cleaning of nodulation. Through this online monitoring and dynamic adjustment mechanism, not only the efficiency of nodulation cleaning is improved, but also the balance of the temperature and air flow in the kiln is ensured, avoiding production interruption or energy consumption waste caused by excessive intervention. In addition, the cleaning method of the present application can flexibly adjust the operation strategy according to different production load conditions, has high adaptability, can minimize the occurrence of nodulation while ensuring the normal operation of the shaft kiln, and effectively improves production efficiency and the service life of the kiln body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of this specification. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0031] Figure 1 It is a schematic flow chart of a method for cleaning nodulation in a shaft kiln provided by an embodiment of the present application;

[0032] Figure 2 It is a schematic structural diagram of a device for cleaning nodulation in a shaft kiln provided by an embodiment of the present application;

[0033] Figure 3 It is a schematic structural diagram of an electronic device for cleaning nodulation in a shaft kiln provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The terms "first", "second", "third", "fourth", etc. (if any) in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments.

[0035] Please refer to Figure 1 , which is a schematic flow chart of a method for cleaning nodulation in a shaft kiln provided by an embodiment of this application, and specifically may include:

[0036] S110. Obtain the monitoring parameters in the shaft kiln, where the monitoring parameters include the top temperature of the kiln, the temperature at the dust removal inlet, the oxygen content, the flame state at the top of the kiln, and the ash discharge temperature;

[0037] Exemplarily, during the operation of the shaft kiln, various operating parameters in the kiln play a crucial role. The top temperature of the kiln and the temperature at the dust removal inlet directly reflect the thermal conditions in the kiln. The top temperature of the kiln usually refers to the temperature of the uppermost layer of the shaft kiln, and its level is related to the heating efficiency of the material and the heat conduction state. The temperature at the dust removal inlet is closely related to the working state of the dust removal system. A higher temperature may affect the operation effect of the dust removal equipment, thereby affecting the air flow and waste gas emission in the kiln. When nodulation occurs, the change in temperature is often the first indicator to reflect the nodulation problem. Too high or too low temperature may lead to the aggravation of the nodulation phenomenon or poor air flow.

[0038] The oxygen content is another important monitoring parameter, which reflects the degree of combustion sufficiency and the air flow situation in the kiln. In a shaft kiln, sufficient oxygen is required to maintain the reaction during the combustion process. If the oxygen content is too low, the combustion may be incomplete, resulting in uneven temperature in the kiln and possibly aggravating the nodulation phenomenon. If the oxygen content is too high, it may lead to waste of energy and make the combustion process unstable, thus affecting the production efficiency. Therefore, controlling the oxygen content within a suitable range is crucial for optimizing the production process of the shaft kiln.

[0039] The flame state at the kiln top and the ash discharge temperature are two other key parameters closely related to the air flow and material distribution. The flame state at the kiln top reflects the distribution and efficiency of fuel combustion in the kiln. The stability and shape of the flame directly affect the uniform heating of the material and the air flow situation. The ash discharge temperature is the temperature at which the material is discharged from the bottom of the shaft kiln. An excessively high ash discharge temperature means that the high-temperature zone in the kiln may be overly concentrated, which may lead to poor material flow, further exacerbating nodulation or affecting the temperature balance in other areas of the kiln. Therefore, by real-time monitoring of these parameters, abnormal conditions in the kiln can be detected in a timely manner, providing a scientific basis for further optimizing the strategy for cleaning nodules.

[0040] S120. Dynamically adjust the material handling process based on the changes in the monitored parameters to optimize the nodule cleaning process and maintain the normal production operation of the shaft kiln, where the material handling process includes the ash discharge frequency and the feeding method.

[0041] Exemplarily, the normal operation of the shaft kiln is closely related to operating conditions such as the temperature, air flow, and oxygen content in the kiln, and the changes in these parameters directly affect the calcination quality of the material and the occurrence of nodulation. To optimize the nodule cleaning process, it is necessary to dynamically adjust the material handling process based on the various operating condition parameters monitored in real time. The adjustment of the material handling process is mainly reflected in the changes in the ash discharge frequency and the feeding method. First, the adjustment of the ash discharge frequency helps to control the temperature in the kiln, avoiding heat accumulation caused by excessive material accumulation at the bottom of the kiln, which further exacerbates the nodulation phenomenon. When the temperature at the kiln top is too high or the ash discharge temperature is too low, increasing the ash discharge frequency can accelerate the discharge of the material, reducing the accumulation of high-temperature substances in the kiln, thereby preventing the further development of nodulation.

[0042] Secondly, the adjustment of the feeding method is another important material handling means. The change in the feeding method directly affects the distribution of the material in the kiln and the air flow state. In the case of severe nodulation, adjusting the feeding direction and frequency can effectively prevent the material from accumulating excessively in certain high-temperature areas, promoting the uniform distribution of the material in the kiln, thereby optimizing the combustion efficiency and heat conduction performance. For example, when the nodulation in the kiln is relatively severe, the change in the feeding direction and the increase or decrease in the feeding frequency can be used to control the change in the high-temperature zone, preventing the formation of nodule blocks.

[0043] By dynamically adjusting the material handling process based on the dynamic changes in various monitored parameters in the kiln, not only can the nodule cleaning process be effectively optimized, but also the normal production operation of the shaft kiln during the cleaning process can be ensured. This adjustment mechanism based on real-time data feedback enables the shaft kiln to flexibly respond to the requirements under different production loads and different nodulation states, further improving the production efficiency and operation stability of the shaft kiln, while reducing the impact of nodulation on the kiln body and ensuring the smoothness and high efficiency of the production process.

[0044] In some instances, it also includes:

[0045] When it is detected that the temperature at the top of the kiln reaches the first preset threshold and the temperature at the dust removal inlet reaches the second preset threshold, stop feeding coal into the shaft kiln.

[0046] Based on the nodulation situation in the shaft kiln, start continuously or intermittently adding a preset number of buckets of cold materials without coal blending into the shaft kiln. Here, the preset number of buckets is 6, and each bucket contains 1.5 tons of stones.

[0047] After the addition of the cold materials without coal blending is completed, resume feeding coal into the shaft kiln.

[0048] Exemplarily, during the production process of the shaft kiln, the changes in the temperature inside the kiln and the temperature at the dust removal inlet directly affect the occurrence and development of the nodulation phenomenon. When the temperature at the top of the kiln and the temperature at the dust removal inlet reach the first and second preset thresholds respectively, it usually means that the high-temperature zone inside the kiln has reached a certain level. At this time, continuing to feed coal into the kiln may further exacerbate the formation of nodules. Excessively high temperature may lead to uneven combustion process, thereby affecting the calcination quality of the materials and increasing the risk of nodulation. Therefore, in this case, stopping feeding coal into the shaft kiln is to avoid further heating the materials inside the kiln, thus inhibiting the aggravation of the nodulation phenomenon.

[0049] Meanwhile, based on the severity of the nodulation in the shaft kiln, in order to destroy the high-temperature zone of the materials inside the kiln and promote the cleaning of the nodules, start continuously or intermittently adding a preset quantity of cold materials without coal blending into the shaft kiln. During the implementation process, the preset number of buckets is 6, and each bucket is approximately 1.5 tons of stones. The addition of these cold materials without coal blending can not only effectively reduce the temperature inside the kiln, but also promote the cracking of the nodules through the "thermal expansion and contraction" effect. When the cold materials come into contact with the high-temperature environment inside the kiln, the temperature difference generated makes it possible for cracks and shedding of the nodule blocks, thus helping to clean the nodules inside the kiln. After the addition of the cold materials is completed, resume the operation of feeding coal, which can restore the normal calcination process and continue production. Through this series of operation steps, the production state of the shaft kiln can be effectively optimized, and the nodules can be removed to ensure the normal calcination of the materials inside the kiln and the stable operation of the shaft kiln.

[0050] It should be noted that in the embodiments of the present application, the first preset threshold is 240 °C, and the second preset threshold is 210 °C.

[0051] In some instances, it further includes:

[0052] During the addition of the cold materials without coal blending, based on the particle size of the cold materials without coal blending, control the rotation direction of the feed trough. Specifically, when the particle size is relatively large, control the feed trough to rotate in the positive direction, where the positive direction is the clockwise direction when observing the distributor from the top of the kiln; when the particle size is relatively small, control the feed trough to rotate in the reverse direction, where the reverse direction is the counterclockwise direction when observing the distributor from the top of the kiln.

[0053] For example, in the process of cleaning nodules in the vertical kiln, the rotation direction of the material trough plays a key role in the effective distribution of the cold material and the crushing of the nodules. According to the particle size of the unmixed coal cold material, adjusting the rotation direction of the material trough can significantly improve the efficiency of nodule cleaning. When adding cold material with larger particle size, control the material trough to rotate in a clockwise direction, which helps to enhance the impact force and dispersion effect of the cold material in the kiln. Larger particles are more likely to impact and break the nodule blocks under the action of clockwise rotation. Through mechanical impact and temperature difference effect, the nodule blocks are cracked and fall off, thereby achieving effective cleaning.

[0054] On the contrary, when adding cold material with smaller particle size, it is more appropriate to control the material trough to rotate in a counterclockwise direction. Smaller particles can more evenly cover the nodule area in the kiln under counterclockwise rotation, promoting uniform heat distribution and fine dispersion of cold material. This rotation method helps to reduce the phenomenon of local overtemperature and avoid the formation of new nodules, while ensuring that the cold material can penetrate into the nodule, further promoting the cracking and shedding of the nodule.

[0055] By adjusting the rotation direction of the trough based on the particle size of the cold material, this application can achieve the best treatment of cold materials of different particle sizes and optimize the nodule cleaning process. The flexible application of clockwise and counterclockwise rotation not only improves the efficiency of nodule cleaning, but also effectively prevents the re-formation of nodules, ensuring the stable operation and continuous efficient production of the vertical kiln during the cleaning process. This dynamic control strategy based on particle size significantly improves the intelligence and precision level of vertical kiln nodule treatment technology.

[0056] In some embodiments, it further comprises:

[0057] Based on the flame status of the kiln roof, the operating frequency of the supply fan and induced draft fan is dynamically adjusted.

[0058] For example, the flame color of the kiln top flame is an important real-time feedback in the combustion process of the vertical kiln, reflecting the oxygen supply of the kiln combustion, the combustion efficiency of the fuel, and the temperature distribution in the kiln. Generally, the change in flame color can indicate whether the combustion is sufficient, thereby providing an important reference for adjusting the airflow in the kiln and controlling nodules. For example, under normal combustion conditions, the flame is orange-yellow, indicating that the supply of oxygen and fuel is in a suitable balance; if the flame is red or blue, it may mean that the oxygen supply is too much or too little, and the combustion efficiency is not high. Based on the changes in the flame color and flame state, dynamically adjusting the operating frequency of the blower and the induced draft fan helps to maintain the combustion stability in the kiln and optimize the nodule cleaning process.

[0059] When an abnormal change in the flame color is detected, the frequencies of the air blower and the induced draft fan can be adjusted according to the combustion state represented by the flame color. If the flame color is bluish, it may indicate that there is too much oxygen in the kiln and the combustion is too intense, which may lead to too high a temperature, thus promoting nodule formation. At this time, the working frequency of the air blower should be reduced to reduce the oxygen supply, avoid uneven temperature caused by too strong a flame, and avoid exacerbation of nodulation; if the flame color is dark red or the flame is weak, it indicates insufficient oxygen supply, incomplete combustion, and poor air flow in the kiln, which may lead to difficulty in cleaning nodules. At this time, the frequency of the air blower should be increased to increase the oxygen supply, improve the combustion state, promote uniform temperature distribution, and reduce nodule formation.

[0060] The adjustment of the induced draft fan is equally crucial. Especially when the flame color is weak, appropriately increasing the working frequency of the induced draft fan can help improve the fluidity of the air flow in the kiln, enhance the gas emission efficiency, avoid heat accumulation and air flow stagnation, and further support the optimization of combustion efficiency and nodule cleaning. By dynamically adjusting the working frequencies of the air blower and the induced draft fan in combination with the change of the flame color of the open flame and the flame state at the kiln top, not only can the combustion process in the kiln be optimized, but also the temperature can be kept stable, avoiding too high or too low temperature in the nodule area, and thus achieving more effective nodule cleaning and stable operation of the shaft kiln.

[0061] It should be noted that in the embodiment of the present application, when there is no visible flame at the kiln top, the frequency of the air blower is increased by 1 - 3 Hz, and the frequency of the induced draft fan is increased by 2 - 4 Hz to prevent the ash discharge temperature from being too high.

[0062] In some examples, it further includes:

[0063] dynamically adjusting the working frequencies of the air blower and the induced draft fan based on the oxygen content; and,

[0064] adjusting the ash discharge frequency and the sealing state of the two-stage valve to control the oxygen content within a preset content range, where the two-stage valve includes an upper valve and a lower valve.

[0065] Exemplarily, during the calcination process of a shaft kiln, the oxygen content is a key parameter for measuring the sufficiency of combustion and the air flow state inside the kiln. An appropriate oxygen content not only ensures the complete combustion of the fuel, improves the calcination efficiency, but also effectively prevents uneven temperature and nodulation inside the kiln. This application monitors the oxygen content inside the kiln in real time and dynamically adjusts the operating frequencies of the blower and induced draft fan based on the monitoring results to maintain the oxygen content within the preset range of 8% - 10%. When the detected oxygen content is lower than 8%, the system automatically increases the operating frequency of the blower to increase the supply of fresh air, ensuring the complete combustion of the fuel and avoiding incomplete combustion and high-temperature accumulation caused by insufficient oxygen. Conversely, when the oxygen content exceeds 10%, the system reduces the operating frequency of the blower and simultaneously increases the operating frequency of the induced draft fan to reduce the excess oxygen inside the kiln and prevent overheating and energy waste during the combustion process.

[0066] In addition, this application further controls the oxygen content inside the kiln by adjusting the ash discharge frequency and sealing state of the two-stage valve. The two-stage valve consists of an upper valve and a lower valve, which are alternately opened and closed to achieve the orderly discharge of materials and the stability of the air pressure inside the kiln. When the oxygen content deviates from the preset range, the system will correspondingly adjust the ash discharge frequency of the two-stage valve. For example, when the oxygen content is lower than 8%, increasing the ash discharge frequency of the two-stage valve helps to discharge more high-temperature materials and waste gas, promoting the entry of fresh air; while when the oxygen content exceeds 10%, reducing the ash discharge frequency helps to retain more combustion products and reduce the oxygen concentration. At the same time, the system also monitors the sealing state of the two-stage valve to ensure that the valve can be tightly closed, preventing the leakage of high-temperature gas inside the kiln and maintaining the pressure and air flow balance inside the kiln. Through this comprehensive dynamic adjustment mechanism, this application can effectively control the oxygen content inside the shaft kiln, optimize the combustion process, improve the calcination efficiency, and significantly reduce the occurrence of nodulation phenomena, ensuring the stable and efficient operation of the shaft kiln.

[0067] In some instances, it also includes:

[0068] Increase the ash discharge frequency when the difference between the ash discharge temperature and the maximum tolerable temperature of the belt conveyor is greater than the preset temperature threshold.

[0069] Exemplarily, the ash discharge temperature is one of the important parameters for measuring the thermal efficiency of the calcination process inside the kiln. At the same time, as a key equipment for material transportation, the high-temperature resistance performance of the belt conveyor directly affects the service life and operating stability of the equipment. The belt conveyor is usually made of high-temperature resistant materials and has a certain temperature tolerance. However, when the difference between the ash discharge temperature and the maximum tolerable temperature of the conveyor exceeds the preset temperature threshold, it may cause thermal degradation, aging, or even melting of the conveyor material, seriously affecting the normal operation of the conveyor. Therefore, real-time monitoring of the difference between the ash discharge temperature and the temperature resistance limit of the conveyor is of great significance for preventing equipment damage and ensuring production continuity.

[0070] To effectively control the ash discharge temperature and avoid excessive heat load on the belt conveyor, when the difference between the ash discharge temperature and the maximum tolerable temperature of the conveyor exceeds the preset threshold, the ash discharge frequency is dynamically increased. By increasing the ash discharge frequency, the discharge speed of the material can be accelerated, the residence time of the material in the kiln can be reduced, thereby reducing the temperature in the kiln and alleviating the heat load borne by the conveyor. This adjustment measure not only helps to keep the temperature in the kiln within a safe range, prevent the conveyor from being damaged due to overheating, but also optimizes the thermal management of the calcination process and improves the overall production efficiency. In addition, the mechanism for dynamically adjusting the ash discharge frequency can perform intelligent control based on real-time temperature data to ensure that the conveyor is always in a safe operating state under different production loads and environmental conditions, extend the service life of the equipment, and reduce the maintenance cost.

[0071] It should be noted that in the embodiment of the present application, the preset temperature threshold is 100 °C.

[0072] In some instances, it further includes: based on the production load situation, adjusting the frequency of the coal-feeding hopper to a preset frequency range and performing clockwise feeding;

[0073] After every preset number of days, feed counterclockwise for a preset time;

[0074] After feeding counterclockwise for the preset time, resume clockwise feeding.

[0075] Exemplarily, during the normal operation of the shaft kiln, the change in production load directly affects the fluidity and temperature distribution of the material in the kiln. When the production load is high, the input speed and quantity of the material increase, which easily leads to the accumulation of the material in the kiln and local overheating, thereby increasing the risk of nodulation. To effectively prevent the occurrence of nodulation, when it is detected that the production load is high, the system adjusts the frequency of the coal-feeding hopper to a preset 8 - 12 times per hour. After every 2 days, change the feeding direction for 2 - 3 hours, and then resume clockwise feeding. By increasing the feeding frequency, it can ensure the uniform distribution of the material in the kiln and avoid local high temperature caused by material accumulation. At the same time, regularly changing the feeding direction helps to break the long-term fixed material flow path in the kiln, promote the temperature balance in different regions, and reduce the formation of nodules.

[0076] When the production load is low, the material input speed is slow and the risk of nodulation is relatively low. At this time, the system adjusts the frequency of the coal-blending feeding hopper to 4-7 times per hour, and every 4 days, the cloth direction is changed for 2-3 hours, and then the cloth direction in the clockwise direction is restored. The lower ash discharge frequency and the fewer feeding frequencies adapt to the lower production load, avoiding energy waste and excessive equipment wear caused by frequent operations. By changing the cloth direction every preset number of days, the high-temperature points in the kiln can be effectively dispersed, preventing a certain area from being in a high-temperature state for a long time, thus maintaining the balance of the temperature in the kiln and further preventing the occurrence of nodulation. This method of dynamically adjusting the operation strategy according to the production load not only improves the operation efficiency of the shaft kiln, but also extends the service life of the equipment, ensuring the stability and high efficiency of the production process.

[0077] It should be noted that in the embodiments of the present application, the high production load means that the production capacity is greater than 70%, and the low production load means that the production capacity is greater than or equal to 30% and less than or equal to 70%.

[0078] In this embodiment, the shaft kiln consists of five core parts: a feeding system, a combustion system, a cooling system, an ash discharge system, and an air and waste gas system. The feeding system realizes automatic feeding through the vibrating feeder, weighing hopper, batching belt conveyor, trolley, variable-frequency hoist and intelligent master controller under the dolomite and raw coal storage bins, ensuring that the raw materials are evenly fed into the kiln at a constant rate. After the materials enter the kiln through the cloth device at the kiln top, they slowly move down with the discharge at the kiln bottom, passing through the preheating zone, calcination zone and cooling zone in sequence, and finally being converted into lightly burned dolomite and entering the ash discharge and storage and transportation process. The combustion system blows the external air into the kiln through the air cap under the kiln by the combustion-supporting air from the Roots blower to support the combustion of the high-temperature coal, generating high-temperature gas for the calcination of the materials.

[0079] The cooling system plays a key role after the materials are calcined. After the calcined lightly burned dolomite enters the cooling zone, the cooling air supplied by the Roots blower cools it through the air cap, quickly reducing the material temperature, ensuring the material stability and facilitating subsequent processing. The ash discharge system discharges the cooled lightly burned dolomite through the disc ash discharger and two-stage seal valve, enters the ash storage hopper, and then falls on the belt conveyor under the kiln by the motor vibrating feeder for further processing. This conveyor is designed to withstand a temperature of up to 150°C to ensure stable operation in a high-temperature environment.

[0080] The air and exhaust gas system is responsible for managing the air flow and exhaust gas emissions in the kiln. The air provided by the combustion-supporting air not only supports the combustion process but also cools the materials through the air caps in the cooling zone, forming secondary high-temperature air, which re-enters the calcination zone to interact with the combustion of high-temperature coal, maintaining the heat balance in the kiln. The exhaust gas generated in the kiln is discharged through two exhaust gas pipes installed on the kiln top, and then merged into the dust collector and treated by the induced draft fan and then discharged into the atmosphere by the desulfurization tower. This system ensures combustion efficiency while reducing harmful emissions, optimizing the air flow and temperature distribution in the kiln, effectively preventing the occurrence of nodulation, and improving the overall operation efficiency and environmental protection performance of the shaft kiln.

[0081] Through the coordinated operation of the above systems, the shaft kiln can achieve an efficient and stable calcination process, ensuring the quality and output of light-burned dolomite, effectively controlling the environmental impact, extending the service life of the equipment, and having significant technical advantages and broad application prospects.

[0082] Please refer to Figure 2 , which is a schematic structural diagram of a cleaning device for shaft kiln nodulation provided by an embodiment of the present application, including:

[0083] A parameter acquisition unit 21, configured to acquire monitoring parameters in the shaft kiln, where the monitoring parameters include kiln top temperature, dust removal inlet temperature, oxygen content, kiln top flame state, and ash discharge temperature;

[0084] A material processing unit 22, configured to dynamically adjust the material processing flow based on the change of the monitoring parameters to optimize the nodulation cleaning process and maintain the normal production operation of the shaft kiln, where the material processing flow includes ash discharge frequency and feeding method.

[0085] Please refer to Figure 3 , an embodiment of the present application further provides an electronic device 300, including a memory 310, a processor 320, and a computer program 311 stored on the memory 310 and executable on the processor. When the processor 320 executes the computer program 311, the steps of any method for cleaning shaft kiln nodulation described above are implemented.

[0086] Since the electronic device introduced in this embodiment is the device adopted for a cleaning device for shaft kiln nodulation in an embodiment of the present application, based on the method introduced in the embodiment of the present application, those skilled in the art can understand the specific implementation manners and various variations of the electronic device in this embodiment. Therefore, the specific implementation of how this electronic device implements the method in the embodiment of the present application will not be described in detail here. As long as the device adopted by those skilled in the art to implement the method in the embodiment of the present application belongs to the scope protected by the present application.

[0087] In the specific implementation process, when the computer program 311 is executed by the processor, it can implement any implementation manner in the corresponding embodiment of the first aspect.

[0088] It should be noted that in the above embodiments, the descriptions of each embodiment have their own focuses. For parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0089] Those skilled in the art should understand that the embodiments of the present application may provide a method, a system, or a computer program product. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application may take the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-readable program code.

[0090] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of flows and / or blocks in the flowchart and / or block diagram can also be implemented. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the specified functions in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0091] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the specified functions in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0092] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the specified functions in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0093] The embodiments of the present application also provide a computer program product, which includes computer software instructions. When the computer software instructions run on a processing device, the processing device is caused to executeFigure 1 The process of a method for cleaning nodulation in a shaft kiln in a corresponding embodiment.

[0094] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, they generate, in whole or in part, a process or function in accordance with the embodiments of the present application. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from a website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that includes one or more integrated available media. The available medium may be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

[0095] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0096] In several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling, direct coupling, or communication connection to each other can be through some interfaces, and the indirect coupling or communication connection of devices or units can be in an electrical, mechanical, or other form.

[0097] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0098] In addition, in each embodiment of the present application, each functional unit can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0099] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present application. The foregoing storage medium includes: various media that can store program codes such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs.

[0100] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of each embodiment of the present application.

[0101] Although the preferred embodiments of this specification have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0102] Obviously, those skilled in the art can make various changes and deformations to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and deformations of this specification fall within the scope of the claims of this specification and their equivalent technologies, this specification is also intended to include these changes and deformations.

Claims

1. A method for cleaning a shaft kiln nodule, characterized in that: The method comprises: Acquiring monitoring parameters in the vertical kiln, wherein the monitoring parameters include kiln top temperature, dust removal inlet temperature, oxygen content, kiln top flame state and ash discharge temperature; Based on the changes in the monitoring parameters, the material handling process is dynamically adjusted to optimize the nodule cleaning process and maintain normal production and operation of the vertical kiln, wherein the material handling process includes the ash discharge frequency and the material distribution method.

2. The method according to claim 1, characterized in that Also includes: When it is detected that the kiln top temperature reaches a first preset threshold and the dust removal inlet temperature reaches a second preset threshold, stopping the coal feeding into the vertical kiln; Based on the agglomeration condition in the shaft kiln, a preset number of buckets of non-coal-admixed cold material is continuously or intermittently added into the shaft kiln, wherein the preset number of buckets is 6, and each bucket includes 1.5 tons of stone; After the addition of the non-coal-mixed cold material is completed, the coal-mixed feeding into the vertical kiln is resumed.

3. The method according to claim 2, characterized in that Also includes: During the process of adding the unmixed coal cold material, the rotation direction of the material trough is controlled based on the particle size of the unmixed coal cold material, wherein, when the particle size is large, the material trough is controlled to rotate in the positive direction; wherein, the positive direction is the clockwise direction when looking down at the distribution machine from the kiln top; when the particle size is small, the material trough is controlled to rotate in the reverse direction, wherein, the reverse direction is the counterclockwise direction when looking down at the distribution machine from the kiln top.

4. The method according to claim 1, characterized in that Also includes: Based on the kiln roof flame state, the operating frequencies of the blower and the induced draft fan are dynamically adjusted.

5. The method according to claim 1, characterized in that Also includes: Based on the oxygen content, dynamically adjust the operating frequency of the forced draft fan and the induced draft fan; and, The ash discharge frequency and sealing state of the two-stage valve are adjusted to control the oxygen content within a preset content range, wherein the two-stage valve includes an upper valve and a lower valve.

6. The method according to claim 1, characterized in that Also includes: When the difference between the ash discharge temperature and the maximum tolerable temperature of the belt conveyor is greater than a preset temperature threshold, the ash discharge frequency is increased.

7. The method according to claim 1, characterized in that Also includes: Based on the production load, adjust the frequency of the coal-mixing hopper to the preset frequency range and distribute the material in a clockwise direction; After every preset number of days, the cloth is fed in a counterclockwise direction for the preset time; After the cloth is fed in the counterclockwise direction for the preset time, the cloth is fed in the clockwise direction again.

8. A device for cleaning a shaft kiln nodules, characterized in that: include: A parameter acquisition unit, used to acquire monitoring parameters in the vertical kiln, wherein the monitoring parameters include kiln top temperature, dust removal inlet temperature, oxygen content, kiln top flame state and ash discharge temperature; The material handling unit is used to dynamically adjust the material handling process based on the changes in the monitoring parameters to optimize the nodule cleaning process and maintain normal production and operation of the vertical kiln, wherein the material handling process includes the ash discharge frequency and the material distribution method.

9. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is used to implement the steps of the method for cleaning vertical kiln nodules as described in any one of claims 1 to 7 when executing the computer program stored in the memory.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for cleaning shaft kiln nodules according to any one of claims 1 to 7 is implemented.

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