Intelligent uniform distribution blast furnace pulverized coal injection device

Abstract

This invention relates to the field of pulverized coal distributor technology and discloses an intelligent uniform distribution blast furnace pulverized coal injection device, comprising: a conical distribution chamber, the distribution chamber including a lower cone and an upper cone cover detachably installed on the top of the lower cone, the bottom of the lower cone being fixedly connected to a pulverized coal supply pipe. This intelligent uniform distribution blast furnace pulverized coal injection device can achieve long-term stable uniform distribution and maintenance-free operation; by utilizing the rotating airflow formed by the built-in guiding element, the pulverized coal is fully mixed and evenly distributed within the chamber before being distributed, resulting in minimal deviation in the amount of pulverized coal at the outlet of each branch pipe, ensuring consistency in pulverized coal injection at all tuyeres. This is crucial for stable blast furnace operation, reducing fluctuations in furnace temperature and reducing atmosphere caused by uneven distribution, and the unique coarse particle settling tank design significantly improves anti-clogging performance: coarse particles and foreign matter are actively separated and collected, preventing them from entering the outlet pipe and avoiding the risk of blockage in the outlet pipe previously observed.

Description

Technical Field

[0001] This invention relates to the field of pulverized coal distributor technology, specifically to an intelligent and uniform pulverized coal injection device for blast furnaces. Background Technology

[0002] In modern steel production, pulverized coal injection (PCO) technology is widely used in the blast furnace ironmaking process as an important energy-saving and consumption-reducing method. The PCO system injects pulverized coal into the blast furnace tuyeres to replace some of the coke, thereby reducing the coke ratio, improving fuel utilization, and optimizing the blast furnace's thermal regime and reduction process. However, uniform distribution of pulverized coal is one of the key factors in achieving efficient operation of the PCO system.

[0003] Traditional blast furnace pulverized coal distributors typically employ a cylindrical or conical cavity structure, connected to a main pipe at the top and multiple branch pipes around the perimeter, passively distributing pulverized coal to various tuyeres. However, this design presents several problems. First, the randomness of pulverized coal flow leads to uneven distribution. Some branch pipes have excessively high pulverized coal flow rates, while others have insufficient flow rates, resulting in an imbalance in coal supply to each tuyer and causing fluctuations in the blast furnace's combustion state, thus affecting its stable operation. Second, pulverized coal is prone to encountering localized eddies or coarse particle aggregation within the distribution cavity, leading to deposition and blockage of certain outlets. This blockage not only exacerbates the uneven distribution but can even cause feed interruptions, severely impacting production efficiency. Although some improved distributors employ wear-resistant linings and more rational outlet layouts, flow deviation and scaling problems are still difficult to avoid during long-term operation, requiring frequent shutdowns for cleaning, increasing equipment maintenance costs and downtime.

[0004] In addition, traditional distributors have other problems during operation. For example, pulverized coal easily adheres to the inner wall of the distribution chamber, forming dust accumulation, which further exacerbates the risk of blockage and uneven distribution. At the same time, due to the lack of effective monitoring and automatic control methods, once blockage or dust accumulation occurs, it is difficult to detect and deal with it in a timely manner, leading to an increased equipment failure rate and reduced production efficiency.

[0005] In summary, existing blast furnace pulverized coal distributors have significant shortcomings in terms of uniform distribution and anti-clogging performance, making it difficult to meet the requirements of modern blast furnace pulverized coal injection systems for uniform and reliable pulverized coal distribution. Therefore, there is an urgent need to develop a new type of blast furnace pulverized coal distributor that can effectively solve the problems of uneven pulverized coal distribution and clogging, improve equipment operating efficiency and reliability, reduce maintenance costs, and thus provide a strong guarantee for the efficient operation of blast furnace pulverized coal injection technology. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides an intelligent, uniformly distributed blast furnace pulverized coal injection device that can achieve long-term, stable, uniform distribution and maintenance-free operation. By utilizing a rotating airflow formed by built-in guiding elements, the pulverized coal is thoroughly mixed and evenly distributed within the cavity before being distributed, resulting in minimal deviation in the amount of pulverized coal at the outlets of each branch pipe, ensuring consistency in pulverized coal injection at all tuyeres. This is crucial for stable blast furnace operation, reducing fluctuations in furnace temperature and reducing atmosphere caused by uneven distribution. Furthermore, the unique coarse particle settling tank design significantly improves anti-clogging performance: coarse particles and foreign matter are actively separated and collected, preventing them from entering the outlet pipe and avoiding the risk of blockage seen in previous outlet pipes, thus solving the problems of uneven pulverized coal distribution and blockage.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: an intelligent uniform distribution blast furnace pulverized coal injection device, comprising:

[0010] A conical distribution chamber, comprising a lower cone and an upper cone cover detachably mounted on the top of the lower cone, wherein a powder supply pipe is fixedly connected to the bottom of the lower cone;

[0011] The lower cone is equipped with a vibrator for periodically vibrating the cavity wall to prevent powder layer adhesion, and a level monitoring sensor that automatically increases vibration or issues a maintenance reminder when abnormal material level is detected, forming a self-cleaning function.

[0012] Several jet pipes are fixedly connected to the conical circumference of the upper cone cover;

[0013] The inner core is connected to the inner top of the upper cone cover, the bottom of the inner core extends into the interior of the lower cone, and the outer surface of the inner core is provided with a plurality of spiral guide vanes.

[0014] Several spiral guide vanes are used to guide the coal powder airflow entering the distribution chamber to rotate and rise tangentially along the cavity wall, so that the coal powder is evenly distributed to the inlet of several injection pipes in a spiral flow.

[0015] Preferably, the lower cone surface of the lower cone is fixedly connected to an annular settling trough; the annular settling trough is used to receive a small amount of coarse particles and impurities that fail to rise with the airflow and are thrown to the lower part of the cavity wall and slide down by using the centrifugal force of the swirling flow.

[0016] The bottom of the annular settling tank is detachably covered with an annular cover plate, which is used by staff to periodically or online to drain the sediment and prevent long-term accumulation and blockage.

[0017] Preferably, an annular baffle is fixedly connected to the inner surface of the lower cone, and the baffle is arranged in an inclined flared shape; the baffle is used to block the sliding coarse particles and impurities, so that they can smoothly enter the annular settling tank, and to reduce the impact of the spiral rising coal powder airflow on the sliding coarse particles and impurities.

[0018] Preferably, each of the plurality of the injection pipes is provided with a pressurizing unit for pressurizing the coal powder flow inside the injection pipe. The pressurizing unit is used to pressurize the coal powder flow inside the injection pipe so that the coal powder flow inside the distribution chamber can quickly enter the injection pipe.

[0019] The top of the upper cone is provided with a drive unit for driving the pressurization unit.

[0020] Preferably, the pressurizing unit includes a pressurizing pipe fixedly connected to the outer surface of the blowpipe, and a sealing piston is provided inside the pressurizing pipe;

[0021] One end of the pressurization tube is slidably connected to a drive shaft for driving the sealing piston left and right via a bracket, and one end of the drive shaft is fixedly connected to the sealing piston.

[0022] The blowpipe is equipped with a sensor group to detect blockages inside the pipe, and the powder inlet end of the blowpipe is flared.

[0023] Preferably, the drive unit includes an electric cylinder fixed to the top of the upper cone cover by a bracket, the electric cylinder being used to extend and retract the drive shafts of several pressurization units.

[0024] Preferably, the top of the upper cone cover is slidably connected to an annular disk via a spring guide post, and a number of movable frames are hinged to the outer surface of the annular disk. The bottom of each movable frame is hinged to a hinge seat, and the hinge seats are slidably connected to the top of the upper cone cover. The drive shafts in the pressurization units are respectively fixedly connected to the hinge seats.

[0025] The telescopic end of the electric cylinder is fixedly connected to a turning block for turning the annular disc.

[0026] Preferably, the working modes of the flow guide core include a continuous rotation state, an intermittent rotation state, and a stopped state;

[0027] The drive unit is used to control the continuous rotation state, intermittent rotation state, and stop state of the guide core.

[0028] The continuous rotation state is used to increase the average distribution intensity of the pulverized coal flow by the inner core of the guide core and to prevent the blockage of the guide area caused by the pulverized coal flow exceeding the conventional specified amount when the amount of pulverized coal in the pulverized coal flow exceeds the conventional specified amount.

[0029] The intermittent rotation state is used when the amount of coal powder in the coal powder flow is at a normal specified amount, but the guiding area of ​​the guiding core is still blocked. By intermittently rotating the guiding core, the blockage of coal powder can be cleared.

[0030] The stop state is used when the amount of pulverized coal in the pulverized coal flow is at a normal specified amount, so that the spiral flow is evenly distributed directly through several spiral guide vanes on the outer surface of the inner core of the guide.

[0031] (III) Beneficial Effects

[0032] Compared with the prior art, the present invention provides an intelligent and uniformly distributed blast furnace pulverized coal injection device, which has the following features:

[0033] Beneficial effects:

[0034] This invention enables long-term, stable, uniform distribution and maintenance-free operation. By utilizing the rotating airflow formed by the built-in guiding element, the pulverized coal is fully mixed and evenly distributed within the cavity before being distributed, resulting in minimal deviation in the amount of pulverized coal at the outlets of each branch pipe, ensuring consistency in pulverized coal injection at all tuyeres. This is crucial for stable blast furnace operation, reducing fluctuations in furnace temperature and reducing atmosphere caused by uneven distribution. Furthermore, the unique coarse particle settling tank design significantly enhances anti-clogging performance: coarse particles and foreign matter are actively separated and collected, preventing them from entering the outlet pipe and avoiding the risk of blockage seen in previous methods.

[0035] This invention utilizes a ring-shaped settling tank to collect small amounts of coarse particles and impurities that fail to rise with the airflow and are thrown to the lower part of the chamber wall and slide down. Furthermore, the baffle plate not only blocks the sliding coarse particles and impurities, allowing them to flow smoothly into the ring-shaped settling tank for storage, but also reduces the impact of the spiraling upward flow of coal powder on the sliding coarse particles and impurities. This prevents the presence of the spiraling upward flow of coal powder from effectively preventing the sliding coarse particles and impurities from entering the ring-shaped settling tank, and also prevents the spiraling upward flow of coal powder from directly impacting the coal powder stored inside the ring-shaped settling tank, causing boiling and affecting the separation and storage effect.

[0036] This invention, through the setting of the drive unit, can not only drive the pressurization unit inside several injection pipes, but also drive the guide core simultaneously, improving the energy-saving and environmental protection of the operation. Furthermore, since the guide core includes a continuous rotation state, an intermittent rotation state, and a stop state, it is not only suitable for uniform guiding of different coal powder amounts in the coal powder flow, but also prevents the problem of blockage in the guiding area caused by different coal powder amounts, further increasing the diversity of uniform coal powder guiding. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the intelligent uniform distribution blast furnace pulverized coal injection device of the present invention;

[0038] Figure 2 This is a cross-sectional front view of the intelligent uniform distribution blast furnace pulverized coal injection device of the present invention;

[0039] Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle;

[0040] Figure 4 This is a schematic diagram of the combination of the upper cone cover and the flow guide inner core of the present invention;

[0041] Figure 5 This is a schematic diagram of the structure of the cone-shaped cover of the present invention;

[0042] Figure 6 This is a bottom view of the structure of the upper conical cover of the present invention;

[0043] Figure 7 This is a top view of the flow-guiding inner core of the present invention;

[0044] Figure 8 This is a schematic diagram of the structure of the jet pipe of the present invention;

[0045] Figure 9 This is a cross-sectional schematic diagram of the blowpipe of the present invention.

[0046] In the diagram: 100, Distribution chamber; 101, Lower cone; 102, Upper cone cover; 103, Powder supply pipe; 104, Vibrator; 105, Annular settling tank; 106, Annular cover plate; 107, Baffle plate;

[0047] 200. Jet nozzle; 201. Pressurization pipe; 202. Sealing piston; 203. Drive shaft; 204. Sensor assembly;

[0048] 300, inner guide core; 301, spiral guide vane;

[0049] 400. Drive unit; 401. Electric cylinder; 402. Spring guide post; 403. Annular disc; 404. Movable frame; 405. Hinge seat; 406. Actuating block; 407. Helical rod; 408. Rotating ring block; 409. One-way bearing. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Example 1:

[0052] See attached document Figures 1-9 Intelligent and uniform blast furnace pulverized coal injection device, including:

[0053] A conical distribution chamber 100 includes a lower cone 101 and an upper cone cover 102 that is detachably installed on the top of the lower cone 101. A powder supply pipe 103 is fixedly connected to the bottom of the lower cone 101.

[0054] The lower cone 101 is equipped with a vibrator 104 for timed vibration of the cavity wall to prevent powder adhesion, and a material level monitoring sensor for detecting abnormal material levels, such as when there is a possible accumulation. The intelligent control system will automatically increase the vibration or issue a maintenance reminder. This forms a self-cleaning function, further ensuring that no powder adheres to the inner wall of the cavity. Once there is a tendency, it can be automatically handled, truly achieving manual cleaning-free operation.

[0055] Several jet pipes 200 are fixedly connected to the conical circumferential surface of the upper conical cover 102.

[0056] The inner core 300 is connected to the inner top of the upper cone shroud 102, and the bottom of the inner core 300 extends into the interior of the lower cone 101. The outer surface of the inner core 300 is provided with a number of spiral guide vanes 301. The spiral guide vanes 301 are used to guide the coal powder airflow entering the distribution chamber 100 to rotate upward tangentially along the cavity wall, so that the coal powder is evenly distributed to the inlet of a number of injection pipes 200 in a spiral flow.

[0057] By guiding the incoming pulverized coal airflow to rotate and rise tangentially along the cavity wall, the pulverized coal is evenly distributed to each outlet in a spiral flow. Through this swirling and even distribution principle, the accumulation of coarse particles and flow deviation can be significantly reduced. The guide core 300 material is made of high-strength wear-resistant alloy, which can be easily disassembled and replaced to adapt to different coal types and wear maintenance needs.

[0058] This invention enables long-term, stable, uniform distribution and maintenance-free operation. By utilizing the rotating airflow formed by the built-in guiding element, the pulverized coal is thoroughly mixed and evenly distributed within the cavity before being distributed, resulting in minimal deviation in the amount of pulverized coal at the outlets of each branch pipe, ensuring consistency in pulverized coal injection at all tuyeres. This is crucial for stable blast furnace operation, reducing fluctuations in furnace temperature and reducing atmosphere caused by uneven distribution.

[0059] Secondly, the unique coarse particle settling tank design greatly improves the anti-clogging performance: coarse particles and foreign objects are actively separated and collected, and will not enter the outlet pipe, thus avoiding the risk of the outlet pipe being blocked in the past.

[0060] With online slag removal, the equipment can operate continuously without frequent shutdowns for cleaning, thus improving production efficiency.

[0061] In addition, the rapping and monitoring system further ensures that no adhesive powder accumulates on the inner wall of the cavity, and can automatically handle any tendency to accumulate, truly achieving manual cleaning-free operation;

[0062] This invention significantly reduces equipment failure rates and maintenance costs. Industrial applications are expected to reduce uneven pulverized coal injection distribution by over 80%, and the probability of injection interruption accidents is virtually zero. This ensures reliable pulverized coal supply in blast furnaces, creating conditions for further increasing the pulverized coal injection rate, resulting in significant economic and safety benefits.

[0063] See attached document Figure 5 , Figure 8 and Figure 9 Each of the several injection pipes 200 is equipped with a pressurizing unit for pressurizing the coal powder flow inside the injection pipe 200. The pressurizing unit is used to pressurize the coal powder flow inside the injection pipe 200 so that the coal powder flow inside the distribution chamber 100 can quickly enter the injection pipe 200.

[0064] The pressurization unit is used to extract the pulverized coal flow or blockage at the inlet of the injection pipe 200, and to quickly transport the extracted material to the nozzle of the injection pipe 200 through pressurization, thereby improving the flow efficiency of pulverized coal and preventing self-clogging of the injection pipe 200.

[0065] The top of the upper cone cover 102 is provided with a drive unit 400 for driving the pressurization unit;

[0066] The drive unit 400 is used to drive the pressurization unit inside the jet pipe 200, so that the pressurization unit pressurizes the jet pipe 200 to increase the jet intensity.

[0067] See attached document Figure 5 , Figure 8 and Figure 9 The pressurization unit includes a pressurization pipe 201 fixedly connected to the outer surface of the blow pipe 200, and a sealing piston 202 is provided inside the pressurization pipe 201; one end of the pressurization pipe 201 is slidably connected to a drive shaft 203 for driving the sealing piston 202 left and right through a bracket, and one end of the drive shaft 203 is fixedly connected to the sealing piston 202.

[0068] The drive shaft 203 drives the sealing piston 202 to pull. At this time, the negative pressure at the pressurization pipe 201 can be used to pull the coal powder flow or blockage at the inlet of the injection pipe 200. With the push of the sealing piston 202, the pulled material can be quickly transported to the nozzle of the injection pipe 200 by pressurization. This not only improves the coal powder flow efficiency, but also prevents the injection pipe 200 from self-clogging.

[0069] The blowpipe 200 is equipped with a sensor group 204 for detecting internal blockage of the pipe, and the powder inlet end of the blowpipe 200 is set in a flared shape.

[0070] By setting up sensor group 204, the blockage inside the blow pipe 200 can be detected. When a blockage occurs, it can be cleared in time. Sensor group 204 includes, but is not limited to, pressure sensors, flow sensors, photoelectric sensors, ultrasonic sensors, vibration sensors and other sensors for detecting pipe blockage.

[0071] By setting the inlet end of the jet pipe 200 to be flared, the pressure at the input and output ends of the jet pipe 200 can be changed. This allows the pressure at the inlet of the jet pipe 200 to be increased when negative pressure is applied through the pressurizing pipe 201. This not only allows the coal powder flow inside the distribution chamber 100 to quickly enter the jet pipe 200, but also allows the pressure to clear any blockages at that location, thereby improving the coal powder flow clearing performance.

[0072] See attached document Figure 5 , Figure 8 and Figure 9 The drive unit 400 includes an electric cylinder 401 fixed to the top of the upper cone cover 102 by a bracket. The electric cylinder 401 is used to extend and retract the drive shaft 203 in a plurality of pressurization units.

[0073] In this embodiment, the electric cylinder 401 is connected to an external power source and control switch to extend and retract the drive shaft 203 in the pressurization unit, thereby pressurizing the pressure inside the blowpipe 200.

[0074] See attached document Figure 5 The top of the upper cone cover 102 is slidably connected to an annular disk 403 via a spring guide post 402. Several movable frames 404 are hinged to the outer surface of the annular disk 403. The bottom of each movable frame 404 is hinged to a hinge seat 405, and the hinge seats 405 are slidably connected to the top of the upper cone cover 102. The drive shafts 203 in several pressurizing units are fixedly connected to the hinge seats 405 respectively.

[0075] In this embodiment, the downward movement of the annular disk 403 can drive several movable frames 404 to move in a fan shape, which in turn can drive several hinge seats 405 to expand or retract around the annular disk 403 as the center, and finally drive the drive shaft 203 in several pressurizing units to extend and retract, forming a synchronous cyclic pressurizing operation of several pressurizing units.

[0076] It should be noted here that the spring guide post 402 consists of a spring and a guide post. It is used to reset the annular disk 403 after it has been pressed down by the elastic force of the spring itself, and to improve the smoothness and guidance of the up and down movement of the annular disk 403 by the guide post.

[0077] The telescopic end of the electric cylinder 401 is fixedly connected to a toggle block 406 for toggling the annular disc 403.

[0078] In this embodiment, the electric cylinder 401 is activated to drive the actuating block 406 to move up and down. After the actuating block 406 moves down to a certain distance, it can squeeze the annular disk 403, causing the annular disk 403 to move down and form a fan-shaped movement of several movable frames 404, ultimately realizing the pressurization drive of the pressurization unit in several blowpipes 200.

[0079] Example 2: The difference from Example 1 is that;

[0080] See attached document Figure 2 and Figure 3 The lower cone surface of the lower cone 101 is fixedly connected to an annular settling trough 105; the annular settling trough 105 receives a small amount of coarse particles and impurities that fail to rise with the airflow due to the centrifugal force of the swirling flow and are thrown to the lower part of the cavity wall and slide down, so as to avoid the coarse coal powder and impurities affecting the coal powder flow input into the coal powder supply pipeline 103 and thus causing blockage problems.

[0081] The bottom of the annular settling tank 105 is detachably covered with an annular cover plate 106. The annular cover plate 106 is used by staff to periodically or online open and discharge sediment, avoiding long-term accumulation and blockage, and improving the convenience of operation.

[0082] A ring-shaped baffle 107 is fixedly connected to the inner surface of the lower cone 101, and the baffle 107 is arranged in an inclined flared shape.

[0083] By setting the baffle plate 107, it is not only used to block the sliding coarse particles and impurities, allowing them to smoothly enter the annular settling tank 105 for storage, but also to reduce the impact of the spiral-shaped rising coal powder airflow on the sliding coarse particles and impurities. This prevents the presence of the spiral-shaped rising coal powder airflow from causing the sliding coarse particles and impurities to not effectively enter the annular settling tank 105, and also prevents the spiral-shaped rising coal powder airflow from directly impacting the coal powder stored inside the annular settling tank 105, causing a re-boiling phenomenon, which would ultimately affect the separation and storage of large-particle coal powder.

[0084] Example 3: The difference from Example 1 is that;

[0085] See attached document Figure 2 , Figure 6 and Figure 7 The working modes of the guide core 300 include continuous rotation, intermittent rotation, and stop; the drive unit 400 is used to control the continuous rotation, intermittent rotation, and stop modes of the guide core 300.

[0086] By setting up the drive unit 400, not only can the pressurization units inside several jet pipes 200 be driven, but the flow guide core 300 can also be driven simultaneously, which improves the energy efficiency and environmental friendliness of the operation.

[0087] The inner core 300 includes continuous rotation, intermittent rotation and stop states, which is not only suitable for uniform guiding of different coal powder amounts in the coal powder flow, but also prevents the problem of blockage in the guiding area caused by different coal powder amounts, further increasing the diversity of uniform coal powder guiding.

[0088] Continuous rotation mode: When the amount of pulverized coal in the pulverized coal flow exceeds the conventional specified amount, the continuous rotation of the inner core 300 increases the average distribution intensity of the pulverized coal flow by the inner core 300 and prevents blockage of the guiding area caused by the excessive amount of pulverized coal; it is suitable for use when there are different amounts of pulverized coal in the pulverized coal flow, further improving the uniform distribution effect of the pulverized coal flow, and simultaneously solving the problem of significant blockage caused by excessive pulverized coal;

[0089] Intermittent rotation mode: When the amount of coal powder in the coal powder flow is at the normal specified amount, but the guiding area of ​​the guiding core 300 is still blocked, the intermittent rotation of the guiding core 300 can clear the blockage of the coal powder; it prevents the guiding core 300 in the stopped state from blocking the guiding area due to impurities or large coal powder particles in the coal powder when evenly distributing the coal powder flow, thus affecting the uniformity of coal powder distribution;

[0090] Stop state: When the amount of coal powder in the coal powder flow is at the normal specified amount, the spiral flow is directly distributed evenly through several spiral guide vanes 301 on the outer surface of the guide core 300 to ensure the stability of the even distribution of the guide core 300.

[0091] The inner core 300 is rotatably connected to the inner top of the upper cone cover 102 by a sealed bearing, and the top of the inner core 300 is provided with a movable groove. The telescopic end of the electric cylinder 401 is fixedly connected to the spiral rod 407 through a connecting shaft. The bottom end of the spiral rod 407 extends into the interior of the movable groove, and the outer surface of the spiral rod 407 is movably fitted with a rotating ring block 408. The rotating ring block 408 is directly fixedly connected to the inner surface of the movable groove or fixedly connected to the inner surface of the movable groove by a one-way bearing 409.

[0092] In this embodiment, the inner core 300 is rotatably installed inside the upper cone cover 102, allowing the inner core 300 to rotate inside the distribution chamber 100. The opening of the movable slot facilitates the drive end of the drive unit 400 to extend into the inner core 300 and drive the inner core 300 to rotate, thus making full use of the driving force of the drive unit 400 and improving the energy efficiency and environmental protection of the device.

[0093] By fixing a spiral rod 407 to the bottom end of the electric cylinder 401, and by installing a rotating ring block 408 inside the guide core 300, with the rotating ring block 408 movably sleeved on the outer surface of the spiral rod 407, when the electric cylinder 401 drives the spiral rod 407 to move up and down, the spiral surface of the outer surface can drive the rotating ring block 408 to rotate, thereby driving the guide core 300 to rotate, thus increasing the uniform distribution and guiding effect of the coal powder flow. It is suitable for guiding coal powder flows with different coal powder amounts, enhancing its uniform distribution effect, and can automatically clear blockages when blockages occur in the guiding area of ​​the guide core 300.

[0094] The rotating ring 408 is connected to the inside of the guide core 300 via a one-way bearing 409. This allows the guide core 300 to rotate indirectly when the screw rod 407 moves downward. Conversely, when the screw rod 407 moves upward to reset, it will not cause the guide core 300 to rotate in the opposite direction. Ultimately, the reciprocating motion of the screw rod 407 can achieve continuous rotation and accelerated rotation of the guide core 300 in the same direction.

[0095] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for intelligent uniform distribution of coal injection in blast furnace, characterized in that, The utility model relates to a kind of coal powder distribution device, including: Conical distribution chamber (100), the distribution chamber (100) includes lower cone (101) and detachably mounted on the top of lower cone (101) upper cone cover (102), the bottom of the lower cone (101) is fixedly communicated with powder pipeline (103); The lower cone (101) is mounted with vibrator (104) for the wall of timed vibration cavity, prevent the vibration of powder layer adhesion, and when detecting abnormal material level, intelligent control system will automatically increase vibration or send maintenance reminder, form material level monitoring sensor self-cleaning function; Several spray pipes (200), several spray pipes (200) are fixedly communicated with the conical peripheral surface of upper cone cover (102) respectively; Flow guide inner core (300) is connected to the inner top of the upper cone cover (102), the bottom of the flow guide inner core (300) extends to the inside of the lower cone (101), and the outer surface of the flow guide inner core (300) is provided with several spiral flow guide vanes (301); Several spiral flow guide vanes (301) are used to guide the tangential rotation of coal powder gas flow entering the distribution chamber (100) along the cavity wall to rise, so that the coal powder is spirally flowed and evenly distributed to the inlets of several spray pipes (200); The inside of several spray pipes (200) is provided with a pressurizing unit for pressurizing the coal powder flow in the inside of the spray pipe (200), and the pressurizing unit is used to make the coal powder flow in the inside of the spray pipe (200) pressurized, so that the coal powder flow in the distribution chamber (100) quickly enters the spray pipe (200); The top of the upper cone cover (102) is provided with a driving unit (400) for driving the pressurizing unit; The pressurizing unit includes a pressurizing pipe (201) fixedly communicated with the outer surface of the spray pipe (200), and the inside of the pressurizing pipe (201) is provided with a sealing piston (202); One end of the pressurizing pipe (201) is slidably connected with a driving shaft (203) for driving the sealing piston (202) left and right through a support, and one end of the driving shaft (203) is fixedly connected with the sealing piston (202); The spray pipe (200) is provided with a sensor group (204) for detecting the blockage in the inside of the pipe, and the powder inlet end of the spray pipe (200) is provided in an expanded shape.

2. The intelligent uniform distribution of coal injection device for blast furnace as claimed in claim 1 wherein: The lower conical surface of the lower cone (101) is fixedly communicated with an annular settling tank (105);The annular settling tank (105) is used to receive a small amount of coarse particles and impurities that fail to rise with the gas flow and slide to the lower part of the cavity wall by using cyclone centrifugal force; The bottom of the annular settling tank (105) is detachably provided with an annular cover plate (106), and the annular cover plate (106) is used to be opened by workers regularly or online to discharge the deposits, to avoid long-term accumulation to form blockage.

3. The intelligent uniform distribution of coal injection device for blast furnace according to claim 2, characterized in that: The inner surface of the lower cone (101) is fixedly connected with an annular blocking piece (107), and the blocking piece (107) is provided in an inclined and expanded shape;The blocking piece (107) is used to block the coarse particles and impurities that slide, so that they smoothly enter the annular settling tank (105), and is used to reduce the influence of the spirally rising coal powder gas flow on the coarse particles and impurities that slide.

4. The intelligent uniform distribution of coal injection device for blast furnace as claimed in claim 1 wherein: The driving unit (400) comprises an electric cylinder (401) fixed on the top of the upper cone cover (102) by a support, and the electric cylinder (401) is used for telescopic driving of the driving shaft (203) in the plurality of pressurizing units.

5. The intelligent uniform distribution of coal injection device for blast furnace as claimed in claim 4 wherein: The top of the upper cone cover (102) is slidably connected with a ring-shaped disc (403) through a spring guide column (402), the outer surface of the ring-shaped disc (403) is hingedly connected with a plurality of movable racks (404), the bottom of each of the plurality of movable racks (404) is hingedly connected with a hinged seat (405), each of the plurality of hinged seats (405) is slidably connected to the top of the upper cone cover (102), and the driving shaft (203) in the plurality of pressurizing units is fixedly connected with the plurality of hinged seats (405) respectively. The telescopic end of the electric cylinder (401) is fixedly connected with a poking block (406) used for poking the ring-shaped disc (403).

6. The intelligent uniform distribution of coal injection device for blast furnace as claimed in claim 4 wherein: The working mode of the flow guiding inner core (300) comprises a sustainable rotation state, an intermittent rotation state and a stop state. The driving unit (400) is used for controlling the sustainable rotation state, the intermittent rotation state and the stop state of the flow guiding inner core (300). The sustainable rotation state is used for increasing the average distribution intensity of the flow guiding inner core (300) to the coal powder flow and preventing the coal powder flow with an amount exceeding the conventional specified amount from causing the blockage of the flow guiding area by the continuous rotation of the flow guiding inner core (300) when the amount of the coal powder in the coal powder flow exceeds the conventional specified amount. The intermittent rotation state is used for dredging the coal powder blockage position by the intermittent rotation of the flow guiding inner core (300) when the flow guiding area of the flow guiding inner core (300) is still blocked when the amount of the coal powder in the coal powder flow is at the conventional specified amount. The stop state is used for directly performing the spiral flow and average distribution work by the plurality of spiral flow guiding pieces (301) on the outer surface of the flow guiding inner core (300) when the amount of the coal powder in the coal powder flow is at the conventional specified amount.

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