Sintering ignition furnace burner capable of inhibiting nodulation
By creating a protective mechanical field through the design of four burners, the problem of nodule formation on the inner surface of the ignition furnace was solved, ensuring the accuracy of the thermocouple and the stability of the sintering process, and achieving effective blocking of rebounding materials and improved temperature control accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-20
AI Technical Summary
In sinter production, nodules are prone to form on the inner surface of the ignition furnace, especially near the thermocouple, which affects the accuracy of the thermocouple and increases gas consumption. Existing technologies lack effective methods for removing these nodules.
The design employs four burners, including a first main burner, a first auxiliary burner, a second main burner, and a second auxiliary burner. By adjusting the spray direction and diameter ratio, a protective mechanical field is formed to prevent rebounding material from entering the area near the thermocouple.
This effectively reduces the possibility of nodule formation near the thermocouple, ensuring the normal working environment and measurement accuracy of the thermocouple, and improving the temperature control precision and stability of the sintering process.
Smart Images
Figure CN224018790U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sintering production in the ignition process technical field, especially to a kind of sintering ignition furnace burner that inhibits nodulation. BACKGROUND
[0002] In sinter production process, ignition process occupies key position.Ignition temperature as the key monitoring process parameter, usually with the help of temperature measuring couple installed on ignition furnace, the flue gas temperature between ignition furnace inner surface and the material on trolley is measured.
[0003] However, in actual production process, the particle on the surface of material on trolley enters ignition furnace, is influenced by the high flow rate, high temperature flame of ignition burner, and is easy to rebound.These small particles melt and rebound to ignition furnace inner surface, and will be adhered to form nodulation.Especially the nodulation problem near temperature measuring couple seriously affects the accuracy of temperature measuring couple, and then interferes with the accurate measurement of sinter ignition temperature, also leads to the increase of coal gas consumption.
[0004] Currently, for the nodulation material of ignition furnace two sides edge, generally uses mechanical cleaning device to clean up.But for the nodulation distributed in the middle position of ignition furnace, especially near temperature measuring couple, there is no effective removal method.This not only affects production efficiency, but also restricts the improvement of product quality, and an innovative solution is needed to improve this situation. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a kind of sintering ignition furnace burner that inhibits nodulation to solve the problems existing in the prior art, simple structure, convenient to use, effectively prevent rebound material from entering the area near temperature measuring couple.
[0006] To achieve the above object, the utility model provides the following scheme:
[0007] The utility model provides a kind of sintering ignition furnace burner of inhibiting nodulation, comprising: first main burner, first vice burner, second main burner and second vice burner, the first main burner is arranged in one side of temperature measuring couple and is connected with hot blast stove and intercommunication, and the ejection direction of the first main burner is perpendicular to the material surface of sintering material;The first vice burner is arranged between the first main burner and the temperature measuring couple and is connected with the hot blast stove and intercommunication, and the ejection direction of the first vice burner is arranged with the included angle between the ejection direction of the first main burner and towards the temperature measuring couple;The second main burner is arranged in the other side of temperature measuring couple and is connected with hot blast stove and intercommunication, and the ejection direction of the second main burner is perpendicular to the material surface of sintering material;The second vice burner is arranged between the second main burner and the temperature measuring couple and is connected with the hot blast stove and intercommunication, and the ejection direction of the second vice burner is arranged with the included angle between the ejection direction of the second main burner and towards the temperature measuring couple;Wherein, the flame, flue gas generated by the gas combustion of the first vice burner and the second vice burner and the gas combustion of the first main burner and the second main burner interact, and protective mechanical field with certain pressure and flow rate is formed before temperature measuring couple.
[0008] Preferably, the diameter of the first vice burner is 1 / 10-1 / 5 of the first main burner.
[0009] Preferably, the diameter of the second vice burner is 1 / 10-1 / 5 of the second main burner.
[0010] Preferably, the extension line of the ejection direction of the first vice burner crosses the vertical projection of the temperature measuring couple on the material surface of sintering material.
[0011] Preferably, the intersection point between the ejection direction of the first vice burner and the material surface of sintering material and the vertical projection point of the temperature measuring couple on the material surface of sintering material is not more than 1 / 10 of the interval of the vertical projection of the first main burner and the temperature measuring couple on the material surface of sintering material.
[0012] Preferably, the extension line of the ejection direction of the second vice burner crosses the vertical projection of the temperature measuring couple on the material surface of sintering material.
[0013] Preferably, the intersection point between the ejection direction of the second vice burner and the material surface of sintering material and the vertical projection point of the temperature measuring couple on the material surface of sintering material is not more than 1 / 10 of the interval of the vertical projection of the second main burner and the temperature measuring couple on the material surface of sintering material.
[0014] Preferably, the first main burner, the first vice burner, the second main burner, the second vice burner and the temperature measuring couple are located in the same plane.
[0015] Preferably, the first main burner and the second main burner are symmetrically arranged with respect to the thermocouple, and the first auxiliary burner and the second auxiliary burner are symmetrically arranged with respect to the thermocouple.
[0016] The utility model discloses relative to prior art has obtained following technical effect:
[0017] The utility model discloses a kind of sintering ignition furnace burners of inhibiting nodulation, the flame and flue gas of four burners interact, form this protective mechanical field can form an effective barrier in front of thermocouple, with the pressure and flow rate generated by the mechanical field, can effectively block rebound material outside the area around thermocouple, greatly reduce the possibility of rebound material nodulation near thermocouple, guarantee the normal working environment and measurement accuracy of thermocouple, to further improve the temperature control precision and stability of entire sintering process. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiments will be simply introduced as follows, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0019] Figure 1 The structure diagram of the sintering ignition furnace burner provided by the utility model for inhibiting nodulation is shown.
[0020] In the drawing: 1, first main burner; 2, first auxiliary burner; 3, second main burner; 4, second auxiliary burner; 5, hot blast stove; 6, thermocouple; 7, sintering material; 8, material surface. DETAILED DESCRIPTION
[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0022] The utility model aims at providing a kind of sintering ignition furnace burners of inhibiting nodulation, to solve the problems existing in the above prior art, simple structure, convenient to use, effectively prevent rebound material from entering the area near thermocouple.
[0023] In order to make the above purpose, features and advantages of the utility model more obvious and easy to understand, the utility model will be further described in detail in combination with drawings and specific embodiments.
[0024] Example 1
[0025] This embodiment provides a sintering ignition furnace burner for inhibiting nodulation, such as... Figure 1 As shown, the assembly includes: a first main burner 1, a first auxiliary burner 2, a second main burner 3, and a second auxiliary burner 4. The first main burner 1 is located on one side of the thermocouple 6 and connected to the hot air furnace 5, with its ejection direction perpendicular to the surface 8 of the sintered material 7. The first auxiliary burner 2 is located between the first main burner 1 and the thermocouple 6 and connected to the hot air furnace 5, with its ejection direction forming an angle with the ejection direction of the first main burner 1 and facing towards the thermocouple 6. The second main burner 3 is located on the other side of the thermocouple 6 and connected to the hot air furnace 5. The first main burner 3 is connected to the second main burner 4, and the ejection direction of the second main burner 3 is perpendicular to the surface 8 of the sintering material 7. The second auxiliary burner 4 is located between the second main burner 3 and the thermocouple 6, and is connected to the hot blast furnace 5. The ejection direction of the second auxiliary burner 4 is at an angle to the ejection direction of the second main burner 3 and is oriented towards the thermocouple 6. The combustion of the gas emitted by the first auxiliary burner 2 and the second auxiliary burner 4 interacts with the flames and flue gas generated by the combustion of the gas emitted by the first main burner 1 and the second main burner 3, forming a protective mechanical field with a certain pressure and flow rate in front of the thermocouple 6. The interaction of the flames and flue gas generated by the four burners forms this protective mechanical field, which can form an effective barrier in front of the thermocouple 6. With the pressure and flow rate generated by this mechanical field, the rebounding material can be effectively blocked outside the area around the thermocouple 6, greatly reducing the possibility of the rebounding material forming nodules near the thermocouple 6, ensuring the normal working environment and measurement accuracy of the thermocouple 6, thereby further improving the temperature control accuracy and stability of the entire sintering process.
[0026] In a preferred embodiment, the diameter of the first auxiliary burner 2 is 1 / 10 to 1 / 5 of that of the first main burner 1. This diameter ratio ensures that the amount of gas ejected from the first auxiliary burner 2 and the airflow and flame intensity generated by combustion match those of the first main burner 1 and meet the requirements of the entire protection system. A suitable ratio ensures that the flame and airflow generated by the first auxiliary burner 2 can effectively cooperate with the flame and flue gas of the first main burner 1 to form a good protective mechanical field without affecting the main operation of the first main burner 1. Furthermore, it allows for adjustment of the ratio to control the strength and range of the protective field based on actual conditions such as the distance between the material surface 8 and the inner surface of the ignition furnace, thus optimally meeting the requirements of the protective thermocouple 6.
[0027] In a preferred embodiment, the second auxiliary burner 4 has a diameter of 1 / 10-1 / 5 of the second main burner 3, and the same principle of setting the ratio of the diameters of the first auxiliary burner 2 and the first main burner 1 is adopted, so that the second auxiliary burner 4 is more reasonably matched with the second main burner 3, and the amount of coal gas sprayed by the second auxiliary burner 4 and the airflow and flame formed thereby can be accurately controlled. The consistent ratio of the double-sided burners ensures the symmetry and coordination of the entire protection field in structure and function, enhances the integrity and stability of the protective mechanical field formed around the thermocouple 6, and better prevents rebounding materials from entering the area of the thermocouple 6 in the two directions.
[0028] In a preferred embodiment, the extension of the spraying direction of the first auxiliary burner 2 passes through the vertical projection of the thermocouple 6 on the sintering material 7, which ensures that the airflow and flame generated by the first auxiliary burner 2 can completely cover the projection area of the thermocouple 6 on the sintering material 7 and the front thereof, so that a stable protection area is formed in front of the thermocouple 6, reducing the risk of impact of rebounding materials from this direction on the thermocouple 6, and more comprehensively protecting the normal working environment and precision of the thermocouple 6.
[0029] In a preferred embodiment, the intersection of the spraying direction of the first auxiliary burner 2 and the vertical projection of the sintering material 7 on the sintering material 7 is not more than 1 / 10 of the distance between the first main burner 1 and the vertical projection of the thermocouple 6 on the sintering material 7. The strict limitation of this distance accurately controls the position and range of the protection field formed by the first auxiliary burner 2. The protection field can effectively protect the key area in front of the thermocouple 6, and avoid excessive deviation causing non-concentration of protection or waste of resources, ensuring that the airflow sprayed by the first auxiliary burner 2 can effectively block the rebounding materials at the most suitable position and distance, and optimizing the protection effect.
[0030] In a preferred embodiment, the extension of the spraying direction of the second auxiliary burner 4 passes through the vertical projection of the thermocouple 6 on the sintering material 7, similar to the first auxiliary burner 2, so that the airflow and flame generated by the second auxiliary burner 4 can cover the projection area of the thermocouple 6 on the sintering material 7, and form a protection for the thermocouple 6 from the other side, strengthening the integrity of the overall protection barrier around the thermocouple 6, and ensuring that rebounding materials from any direction can be effectively blocked, thereby comprehensively improving the protection capability of the thermocouple 6.
[0031] In a preferred embodiment, the distance between the intersection of the extension of the jet direction of the second auxiliary burner 4 and the material surface 8 of the sintering material 7 and the vertical projection point of the temperature measuring couple 6 on the surface of the sintering material 7 is not greater than 1 / 10 of the distance between the second main burner 3 and the vertical projection of the temperature measuring couple 6 on the surface of the sintering material 7. This distance limit ensures that the protective field formed by the second auxiliary burner 4 matches the protective field formed by the first auxiliary burner 2, both sides accurately meet the protection needs and are efficiently concentrated in the key area in front of the temperature measuring couple 6, further improving the balance and stability of the overall protective field, better playing the role of blocking rebounding materials, and ensuring a relatively pure and undisturbed working environment around the temperature measuring couple 6.
[0032] In a preferred embodiment, the first main burner 1, the first auxiliary burner 2, the second main burner 3, the second auxiliary burner 4 and the temperature measuring couple 6 are located in the same plane, and all these key components are in the same plane, which ensures the compactness of the space layout between the entire burner system and the temperature measuring couple 6 and the efficiency of the collaborative work, so that the flames and flue gases sprayed by each burner can realize optimal interaction and mixing in the same plane, and it is easier to form a uniform and stable protective mechanical field around the temperature measuring couple 6 in the same plane, which is beneficial to fully play the expected protection role of the burner layout, and brings convenience for the design optimization and actual operation and maintenance of the overall system.
[0033] In a preferred embodiment, the first main burner 1 and the second main burner 3 are symmetrically arranged about the temperature measuring couple 6, and the first auxiliary burner 2 and the second auxiliary burner 4 are symmetrically arranged about the temperature measuring couple 6, which further optimizes the distribution of the thermal flow field and the air flow field around the temperature measuring couple 6. The flames and flue gases sprayed by the burners on both sides are more balanced in terms of temperature distribution, pressure distribution and flow velocity distribution, thereby forming a more symmetrical, stable and uniform protective mechanical field. Not only can the blocking ability of rebounding materials from different directions be maximized, but also the problem of uneven protection caused by one side being too strong or too weak can be avoided, thereby comprehensively improving the protection degree of the temperature measuring couple 6 and ensuring stable and accurate temperature measurement and control during the sintering process.
[0034] Embodiment Two
[0035] The embodiment also provides a use method of the sintering burner of the sintering ignition furnace for inhibiting nodulization, comprising the following steps:
[0036] Preparation stage
[0037] Connect the gas supply system: According to the layout and connection mode of the hot blast stove 5 and the external gas pipeline network, the first main burner 1, the first auxiliary burner 2, the second main burner 3 and the second auxiliary burner 4 are accurately connected with the gas supply pipeline according to the design requirements. Ensure that the connection part is sealed well, select appropriate sealing materials such as high temperature resistant rubber sealing ring to prevent gas leakage. Perform pressure test, use professional pressure detection equipment to detect whether the pipeline connection part can withstand normal working pressure to ensure no leakage problem. For example, after connecting the pipeline, use airtight detection instrument, fill in a certain pressure nitrogen, maintain for a certain time to observe whether the pressure decreases, if the pressure does not decrease, it indicates that the sealing performance is good.
[0038] Install and debug the temperature measuring thermocouple 6: Install the temperature measuring thermocouple 6 at the middle position of the two rows of burners according to the design requirements. Use special installation tools and positioning devices to ensure the position accuracy. After installation, calibrate and debug the temperature measuring thermocouple 6. Use standard temperature source to calibrate the temperature measuring thermocouple 6, so that the measurement temperature and the standard temperature error are within the specified range. For example, use a known fixed melting point tin block with a melting point of 231.9℃, measure the error after using the temperature measuring equipment, if the error exceeds the given allowable range, adjust or replace it.
[0039] Check the hot blast stove 5 and the burners: Check the hot blast stove 5 comprehensively, check whether the structure of the stove body is complete, whether there are cracks, perforations and other conditions, and check whether the refractory materials in the hot blast stove 5 are intact, whether there are falling off, damage and other phenomena. Check each burner, including checking whether the installation of the burner is firm, whether each connection part is loose; check whether the inside of the burner is clean, whether there are foreign matters to block, and ensure that the gas can be smoothly sprayed out.
[0040] Working stage
[0041] Start the gas supply system: According to the requirements of sintering process, first slowly open the valve on the gas supply pipeline, so that the gas gradually enters the first main burner 1, the first auxiliary burner 2, the second main burner 3 and the second auxiliary burner 4. During the gas delivery process, closely observe the changes of gas pressure and flow, use the pressure sensor and flow meter installed on the pipeline to monitor in real time, to ensure that it meets the pre-set working parameter range.
[0042] Ignition operation: After the gas supply is stable, use the ignition device to ignite the burner. Use mature electrical ignition, flame ignition or high temperature object ignition method to ensure that the ignition is successful at one time. During the ignition process, the operator should take safety precautions and observe the ignition situation from a safe distance. If the ignition fails, the gas valve should be closed in time, and the ignition should be restarted after troubleshooting. For example, when electric ignition, make sure that the ignition electrode position is correct and the ignition energy is sufficient.
[0043] Adjusting the burner parameters: After successful ignition, according to the temperature distribution of the sintering material 7 surface and the sintering process requirements, the parameters such as the amount of spray, spray angle of the burner are fine-tuned. By adjusting the flow control valve on the gas supply pipeline, the amount of gas sprayed by each burner is precisely controlled, and then the intensity and temperature of the flame are adjusted. For the first and second auxiliary burners 2 and 4, the spray direction can be fine-tuned through a special angle adjustment device to ensure that the gas they spray burns with the flame and flue gas produced by the first and second main burners 1 and 3, and that they form a stable and effective protective mechanical field in front of the thermocouple 6. For example, for sintering materials of special thickness, the gas supply of the main burners can be appropriately increased to ensure sufficient preheating and sintering of the material.
[0044] Monitoring and feedback regulation: During the entire sintering process, the thermocouple 6 measures the flue gas temperature between the inner surface of the ignition furnace and the material on the pallet in real time. The measured temperature data is transmitted to the control system and displayed in real time through the display instrument. The operator adjusts the feedback according to the temperature data and sintering process requirements. If the temperature is too high or too low, the control system automatically adjusts the gas spray amount of the burner according to the preset logic, or manually adjusts it. At the same time, attention should also be paid to the state of the protective field. If the protective field is found to be ineffective in blocking rebounding material, the parameters of the auxiliary burners can be fine-tuned to optimize the state of the protective field. For example, if the thermocouple 6 measures a temperature higher than the set value, the control system automatically reduces the gas supply flow of the burner, keeping the sintering process stable within the appropriate temperature range.
[0045] End stage
[0046] Stop gas supply: When the sintering process is completed, first close the valve on the gas supply pipeline to gradually cut off the gas supply to each burner. When closing the valve, it should be operated in accordance with the specified order and speed to avoid damage to the equipment due to sudden pressure changes.
[0047] Cooling and equipment maintenance: After the burners stop working, the hot blast furnace 5 needs to be naturally cooled or cooled by appropriate cooling methods. During the cooling process, the entire device is inspected and maintained to observe whether the components such as the burners and thermocouples 6 are damaged, whether the connecting parts are loose or deformed, etc. Impurities and dust inside and outside the burners are cleaned in time to ensure that the equipment is in good condition and ready for the next use. For example, after a batch of sintering is completed and naturally cooled, the inside of the burner is cleaned using tools, and the main structure of each burner is checked for damage. If damaged, it should be replaced or repaired in time.
[0048] The principle and implementation mode of the utility model are described by applying specific examples, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model. In conclusion, the content of the specification should not be understood as the limitation of the utility model.
Claims
1. A sintering ignition furnace burner for inhibiting nodulation, characterized in that: include: The first main burner is located on one side of the thermocouple and connected to the hot air furnace, and the spray direction of the first main burner is perpendicular to the surface of the sintering material. The first auxiliary burner is disposed between the first main burner and the thermocouple and is connected to and communicates with the hot air furnace. The ejection direction of the first auxiliary burner is set at an angle with the ejection direction of the first main burner and is directed toward the thermocouple. The second main burner is located on the other side of the thermocouple and connected to the hot air furnace, and the ejection direction of the second main burner is perpendicular to the surface of the sintering material. The second auxiliary burner is disposed between the second main burner and the thermocouple and is connected to and communicates with the hot air furnace. The ejection direction of the second auxiliary burner is set at an angle with the ejection direction of the second main burner and is directed toward the thermocouple. The combustion of gas from the first and second auxiliary burners interacts with the flames and flue gas generated by the combustion of gas from the first and second main burners, forming a protective mechanical field with a certain pressure and flow rate in front of the thermocouple.
2. The sintering ignition furnace burner for inhibiting nodulation according to claim 1, characterized in that: The diameter of the first auxiliary burner is 1 / 10 to 1 / 5 of that of the first main burner.
3. The sintering ignition furnace burner for inhibiting nodulation according to claim 2, characterized in that: The diameter of the second auxiliary burner is 1 / 10 to 1 / 5 of that of the second main burner.
4. The sintering ignition furnace burner for inhibiting nodulation according to claim 3, characterized in that: The extension line of the ejection direction of the first burner crosses the vertical projection of the thermocouple on the sintering material surface.
5. The sintering ignition furnace burner for inhibiting nodulation according to claim 4, characterized in that: The distance between the intersection of the extension line of the ejection direction of the first auxiliary burner and the surface of the sintered material and the vertical projection point of the thermocouple on the surface of the sintered material is no greater than 1 / 10 of the distance between the vertical projections of the first main burner and the thermocouple on the surface of the sintered material.
6. The sintering ignition furnace burner for inhibiting nodulation according to claim 5, characterized in that: The extension line of the ejection direction of the second burner crosses the vertical projection of the thermocouple on the sintering material surface.
7. The sintering ignition furnace burner for inhibiting nodulation according to claim 6, characterized in that: The distance between the intersection of the extension line of the ejection direction of the second auxiliary burner and the surface of the sintered material and the vertical projection point of the thermocouple on the surface of the sintered material is no greater than 1 / 10 of the distance between the vertical projections of the second main burner and the thermocouple on the surface of the sintered material.
8. The sintering ignition furnace burner for inhibiting nodulation according to claim 1, characterized in that: The first main burner, the first auxiliary burner, the second main burner, the second auxiliary burner, and the thermocouple are located in the same plane.
9. The sintering ignition furnace burner for inhibiting nodulation according to claim 8, characterized in that: The first main burner and the second main burner are symmetrically arranged with respect to the temperature measuring coupler, and the first auxiliary burner and the second auxiliary burner are symmetrically arranged with respect to the temperature measuring coupler.