Method for suppressing dust raising of sintering plate type ore feeder

Abstract

The invention belongs to the technical field of environmental protection and dust suppression, and relates to a method for suppressing dust raising of a sintering plate feeder, which comprises the following steps of: reducing the fall between a discharge port of an ore unloading shuttle groove and the plate feeder, and changing the position of a material receiving point of the plate feeder; the discharging mode of the ore unloading shuttle groove is changed; the sealing and dust extraction measures of the plate feeder are improved, the problem of dust raising during discharging of the sintering plate feeder can be effectively solved, and the environmental protection problem caused by equipment of an existing structure and an existing operation method is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental protection and dust reduction, and relates to a method for suppressing dust in a sintered plate feeder. Background Art

[0002] At present, it is well-known that most steel plants still use sintering machines to roast sintered ore for use in blast furnaces. During the production process, the sintered ore is cooled by a ring cooler and then transported to the finished product system. At the end of the ring cooler, the finished sintered ore is discharged into the plate feeder through a discharge chute. After buffering by the plate feeder, it is then discharged onto the finished product conveyor belt for transportation. Affected by the height positions of the cooling flue box, trolley turning and discharging, etc. of the ring cooler, the height of the discharge chute is relatively high, and the drop between the discharge chute and the plate feeder is also relatively large. At present, the sealing effect of many used plate feeders is poor. When discharging from the ring cooler, an instantaneous positive pressure is formed inside the discharge chute and the plate feeder, and it is difficult for the dust extraction point of the dust collector to cover, resulting in dust escaping from the gaps of the plate feeder, causing dust pollution and affecting the environment. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a method for suppressing dust in a sintered plate feeder, solve the problem of dust in the sintered plate feeder, and eliminate the impact on environmental protection.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A method for suppressing dust in a sintered plate feeder, including the following steps:

[0005] S1, reduce the drop between the discharge opening of the discharge chute and the plate feeder, and at the same time change the position of the receiving point of the plate feeder:

[0006] S11, weld and install a square chute at the discharge opening, lower the rear of the discharge opening by 200 mm, and lower the front of the discharge opening by 480 mm;

[0007] S12, weld and install a chute plate at the rear of the discharge opening to form an inclined chute with the chute. The size of the inclined chute is determined according to the on-site position, so that the feeding point is moved forward from the tail of the plate feeder to before the middle;

[0008] S2, change the discharging mode of the discharge chute:

[0009] S21, when the discharge chute is working normally, control the internal stored material between 10T - 30T, reduce the drop between the trolley discharging of the ring cooler and the material surface in the chute, and at the same time ensure that there is sufficient material at the receiving point of the plate feeder to form a dragging and feeding mode;

[0010] S22, adjust the running speed of the plate feeder to be controlled between 6.2 m / s - 6.7 m / s to ensure smooth discharging of the plate feeder, match the discharging rhythm of the ring cooler, and facilitate controlling the stored material amount in the discharge chute of the ring cooler;

[0011] S3, Startup operation process and system program control:

[0012] S31, Manual operation: Start the conveyor belt under the plate feeder → Start the annular cooler for discharging → Control the stock in the ore discharge chute between 10T - 30T, and start the plate feeder;

[0013] S32, Automatic operation: Click the startup button of the finished product system → After 10s, start the conveyor belt under the plate feeder → The system judges the stock in the ore discharge chute;

[0014] S4, Sealing and dust extraction of the plate feeder; Ensure the good sealing of the plate feeder through maintenance, and reduce the air volume at the dust extraction point according to the on-site dust situation to save energy for the dust removal system.

[0015] Optionally, wear-resistant steel bricks or wear-resistant plates are installed on the surface of the chute.

[0016] Optionally, the front-back height difference of the inclined chute is 280mm, the width is 680mm, wear-resistant plates are installed on the surface of the chute, and wear-resistant steel bricks are installed at the discharge opening of the chute.

[0017] Optionally, in step S31, the feeding speed of the plate feeder is 6.2m / s - 6.7m / s.

[0018] Optionally, in step S32, when the stock < 20T, start the annular cooler for discharging, and after the stock ≥ 20T, start the plate feeder; when the stock ≥ 20T, start the plate feeder, and after the stock < 20T, start the annular cooler for discharging.

[0019] The beneficial effects of the present invention are as follows:

[0020] (1) Innovation of the dust suppression system

[0021] Through the transformation of the stepped discharge port structure and the design of the inclined chute for guiding materials, a buffer-type material transmission channel is constructed to effectively eliminate the air flow disturbance generated by traditional direct falling. The optimized material guiding system significantly enhances the controllability of the material conveying trajectory, fundamentally inhibits the phenomenon of dust escape, and forms a closed dust suppression operation environment.

[0022] (2) Optimization of equipment collaborative operation

[0023] The innovatively designed dynamic stock control mechanism realizes the process coupling of the annular cooler and the feeder: ① Establish an adaptive adjustment system for a 10 - 30T buffer material layer to ensure the continuous and stable operation of the equipment; ② Develop a precise speed difference matching mode to form a dynamic balance between the feeding rhythm and the discharging process; ③ The modular upgrade of the sealing structure significantly improves the airtightness of the equipment and constructs multiple dust barrier barriers.

[0024] (3) Breakthrough in intelligent control technology

[0025] The reconstructed starting control logic forms a trinity intelligent system: ① The material level - speed interlock control realizes the optimization of the equipment starting and stopping sequence; ② The dual - mode operation architecture takes into account both production flexibility and automation requirements; ③ The self - diagnosis system monitors the sealing state and component wear in real time, significantly improving the system reliability.

[0026] (4) Comprehensive benefits are comprehensively improved

[0027] After the implementation of the technical solution, a closed - loop improvement effect is formed: ① The visibility of the working environment is significantly improved, and the level of occupational health protection is enhanced; ② The extended equipment maintenance cycle and reduced energy consumption produce superimposed economic benefits; ③ The optimized operation efficiency of the dust removal system realizes double benefits of environmental protection and energy conservation. This innovative system provides a reusable technical transformation paradigm for the clean production of the sintering process.

[0028] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. Brief Description of the Drawings

[0029] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, where:

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0031] Reference numerals: shuttle chute 1, inclined chute 2, plate feeder 3. Detailed Description of the Preferred Embodiment

[0032] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention schematically. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0033] Among them, the drawings are only used for exemplary illustration, showing only schematic diagrams, not physical diagrams, and should not be construed as limiting the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged, or reduced, which do not represent the dimensions of the actual products; for those skilled in the art, it is understandable that some well - known structures and their descriptions in the drawings may be omitted.

[0034] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be construed as a limitation of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] Please refer to Figure 1 , a method for suppressing dust in a sintered plate type feeder, comprising the following steps:

[0036] S1. Reduce the height difference between the discharge chute 1 of the ore unloading chute and the plate feeder, and at the same time change the receiving point position of the plate feeder:

[0037] S1.1 The original height difference between the discharge chute of the ore unloading chute and the receiving surface of the plate feeder is 980 mm. A square chute 1 is welded and installed on the discharge port, the rear of the discharge port is lowered by 200 mm, and the front of the discharge port is lowered by 480 mm; wear-resistant steel bricks or wear-resistant plates are installed on the surface of the chute 1;

[0038] S1.2 A chute plate is welded and installed behind the unloading buckle, forming an inclined chute 2 with the chute 1 installed in S1.1. The height difference between the front and rear of the inclined chute 2 is 280 mm, and the width is 680 mm (the specific dimensions are determined according to the on-site position. The goal is to move the feeding point from the tail of the original plate feeder 3 to the front of the middle); wear-resistant plates are installed on the surface of the chute, and wear-resistant steel bricks are installed at the discharge port of the chute;

[0039] S2. Change the ore unloading mode of the ore unloading chute:

[0040] S2.1 When the ore unloading chute is working normally, control the internal stored material between 10T - 30T, reduce the height difference between the ore unloading of the ring cooler trolley and the material surface in the chute, and at the same time ensure that there is sufficient material at the receiving point of the plate feeder 3 to form a dragging and feeding mode;

[0041] S2.2 Adjust the running speed of the plate feeder 3 from the original 5.0 m / s - 5.5 m / s to be controlled between 6.2 m / s - 6.7 m / s to ensure smooth discharging of the plate feeder 3, match the discharging rhythm of the ring cooler, and facilitate controlling the stored material amount in the ore unloading chute of the ring cooler;

[0042] S3. Startup operation process and system program control:

[0043] Example 1,

[0044] S3.1 Manual operation:

[0045] Operation process before improvement: Start the conveyor belt under the plate feeder 3 → Start the plate feeder 3 (feeding speed: 5.0 m / s - 5.5 m / s) → Start the annular cooler for discharging. There is a sequence for starting, but no time requirement.

[0046] Operation process after improvement: Start the conveyor belt under the plate feeder 3 → Start the annular cooler for discharging → Control the material stored inside the ore discharging chute between 10 T and 30 T, and then start the plate feeder 3 (feeding speed: 6.2 m / s - 6.7 m / s).

[0047] Example 2

[0048] S3.2 Automatic operation:

[0049] Operation process before improvement: Click the start button of the finished product system → After 10 s, start the conveyor belt under the plate feeder 3 → After 10 s, start the plate feeder 3 (automatic feeding speed: 5.5 m / s) → After 10 s, start the annular cooler for discharging.

[0050] Operation process after improvement: Click the start button of the finished product system → After 10 s, start the conveyor belt under the plate feeder 3 → The system judges the material stored inside the ore discharging chute. ① If the stored material < 20 T, start the annular cooler for discharging; after the stored material ≥ 20 T, start the plate feeder 3. ② If the stored material ≥ 20 T, start the plate feeder 3; after the stored material < 20 T, start the annular cooler for discharging.

[0051] Sealing and dust extraction of the plate feeder 3: Ensure the integrity of the seal of the plate feeder 3 through maintenance, and reduce the air volume at the dust extraction point according to the on-site dust situation to save energy consumption for the dust removal system.

[0052] In this embodiment, the square chute added by welding in step S1 needs to be modified according to the size of the original discharging port on site, and wear-resistant steel bricks or wear-resistant plates need to be laid on the surface to increase the service life; wear-resistant plates are added to the chute surface to increase the service life, and wear-resistant steel bricks are added to the discharging port of the chute, and the steel bricks are higher than the chute plate to form local material hitting the material.

[0053] In this embodiment, the material stored in the ore discharging chute in step S2 is controlled between 10 T and 30 T. The stored material quantity is adjusted according to the production volume of sintered ore, and the stored material quantity needs to be reasonable. If it is too little, it cannot form dragging and feeding; if it is too much, it will increase the load of the plate feeder 3.

[0054] In this embodiment, the operating speeds of the annular cooler and the plate feeder 3 in step S2 are the key to controlling the material stored in the ore discharging chute and need to match each other.

[0055] In this embodiment, the key to the operation process in step S3 is to control the material stored inside the ore discharging chute.

[0056] The present invention is applied in a steel plant, and the on-site dust has been significantly improved. Within the controllable range, it meets the on-site environmental protection requirements, avoids scattered emissions, and the environmental protection reaches the standard.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A method for suppressing dust in a sintered plate feeder, characterized in that, It includes the following steps: S1. Reduce the elevation difference between the discharge chute of the ore unloading chute and the apron feeder, and at the same time change the position of the receiving point of the apron feeder; S2. Change the ore unloading mode of the ore unloading chute: S21. When the ore unloading chute is working normally, control the internal stored material between 10T and 30T, reduce the elevation difference between the ore unloading of the pallet cooler trolley and the material surface in the chute, and at the same time ensure that there is sufficient material at the receiving point of the apron feeder to form a dragging and feeding mode; S22. Adjust the running speed of the apron feeder to be controlled between 6.2m / s and 6.7m / s to ensure smooth discharging of the apron feeder, match the discharging rhythm of the pallet cooler, and facilitate the control of the stored material quantity in the ore unloading chute of the pallet cooler; S3. Startup operation process and system program control: S31. Manual operation: Start the conveyor belt under the apron feeder → Start the pallet cooler for ore unloading → Control the internal stored material in the ore unloading chute between 10T and 30T, and start the apron feeder; S32. Automatic operation: Click the start button of the finished product system → After 10s, start the conveyor belt under the apron feeder → The system judges the internal stored material in the ore unloading chute; S4. Seal and dust extraction of the apron feeder; Ensure the integrity of the seal of the apron feeder through maintenance, and reduce the air volume at the dust extraction point according to the on-site dust situation to save energy consumption for the dust removal system.

2. The method for suppressing dust in a sintered plate feeder according to claim 1, wherein: Install wear-resistant steel bricks or wear-resistant plates on the surface of the chute.

3. A method for suppressing dust in a sintered plate feeder according to claim 1, characterized in that: The front and rear height difference of the inclined chute is 280mm, the width is 680mm, install wear-resistant plates on the surface of the chute, and install wear-resistant steel bricks at the discharge opening of the chute.

4. A method for suppressing dust in a sintered plate feeder according to claim 1, characterized in that: In step S31, the feeding speed of the apron feeder is 6.2m / s - 6.7m / s.

5. A method for suppressing dust in a sintered plate feeder according to claim 1, characterized in that: In step S32, when the stored material < 20T, start the pallet cooler for ore unloading, and after the stored material ≥ 20T, start the apron feeder; when the stored material ≥ 20T, start the apron feeder, and after the stored material < 20T, start the pallet cooler for ore unloading.

6. The method for suppressing dust in a sintered plate feeder according to claim 1, characterized in that: Step S1 also includes S11. Weld and install a square chute at the discharge opening, lower the rear of the discharge opening by 200mm, and lower the front of the discharge opening by 480mm.

7. A method for suppressing dust in a sintered plate feeder according to claim 1, characterized in that: Step S1 also includes S12. Weld and install a chute plate at the rear of the discharge opening to form an inclined chute with the chute. The size of the inclined chute is determined according to the on-site position, so as to move the feeding point forward from the tail of the apron feeder to before the middle part.

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