Air-powder mixer for optimizing auxiliary air distribution of coal pulverizing system

Abstract

The invention relates to the technical field of safe operation of boilers, and discloses an air-powder mixer for optimizing auxiliary air distribution of a coal pulverizing system, the air-powder mixer comprises an air conveying channel and a blanking pipe, the side part of the air conveying channel is communicated with an air-powder encountering channel, the side part of the air-powder encountering channel is communicated with an air-powder mixing channel, and the blanking pipe is communicated with an air inlet of the air-powder mixing channel. The top of the air and powder meeting channel communicates with the bottom of the discharging pipe, a turbulent flow mechanism is arranged on the inner wall of the air and powder mixing channel, an auxiliary air mechanism is arranged on the outer side of the air and powder meeting channel, a pulverized coal collecting mechanism is arranged on the outer side of the air and powder meeting channel, and a static electricity eliminating mechanism is arranged on the outer side of the air and powder meeting channel. The end, close to the wind-powder meeting channel, of the wind-powder mixing channel is large in opening, and the end, away from the wind-powder meeting channel, of the wind-powder mixing channel is small in opening. Through the large opening end of the air-powder mixing channel, the air-powder mixture can be fully diffused when initially entering the air-powder mixing channel, and more air powder can participate in the early-stage full contact and mixing process in cooperation with the mixing effect of the spoiler.

Description

Technical Field

[0001] The invention relates to the technical field of safe operation of boilers, and in particular to an air-powder mixer for optimizing auxiliary air distribution of a pulverizing system. Background Art

[0002] In the pulverizing system, air-powder mixing is a critical link, and its quality is directly related to the operating efficiency and safety of the entire system. The purpose of optimizing the auxiliary air distribution of the pulverizing system is to accurately control the air-powder ratio and mixing state to meet the needs of different production conditions, thereby improving combustion efficiency, reducing energy consumption and reducing pollutant emissions. As the core equipment to achieve this goal, the air-powder mixer undertakes the important mission of promoting the uniform mixing of coal powder and air and stable transportation.

[0003] The air-powder conveying channel of the traditional air-powder mixer is generally a simple straight pipe shape. The connection method between the conveying air channel and the feeding pipe is relatively direct, which is just a simple docking of the air source and the coal powder source. In the prior art, due to the lack of effective air-powder mixing optimization means, the air-powder mixing is uneven, and the air-powder mixture fails to achieve sufficient mixing and uniform distribution before entering the primary air duct, thus affecting the combustion efficiency and stability. In the combustion process, local incomplete combustion is prone to occur, resulting in serious energy waste. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an air-powder mixer for optimizing the auxiliary air distribution of the powder making system, which solves the problem that the air-powder mixing is uneven due to the lack of effective air-powder mixing optimization means, and the air-powder mixture fails to achieve sufficient mixing and uniform distribution before entering the primary air duct, thus affecting the combustion efficiency and stability.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an air-powder mixer for optimizing auxiliary air distribution of a pulverizing system, comprising a conveying air channel and a feeding pipe, the side of the conveying air channel is connected with an air-powder meeting channel, the side of the air-powder meeting channel is connected with an air-powder mixing channel, the top of the air-powder meeting channel is connected with the bottom of the feeding pipe, the inner wall of the air-powder mixing channel is provided with a spoiler mechanism, the outer side of the air-powder meeting channel is provided with an auxiliary air mechanism, the outer side of the air-powder meeting channel is provided with a coal powder collecting mechanism, and the outer side of the air-powder meeting channel is provided with a static electricity elimination mechanism;

[0006] The wind-powder mixing channel has a larger opening at one end close to the wind-powder meeting channel, and a smaller opening at one end away from the wind-powder meeting channel;

[0007] The spoiler mechanism includes two groups of spoiler plates 1 and one group of spoiler plates 2. The two groups of spoiler plates 1 are fixedly connected to the inner wall of the air-powder mixing channel. The spoiler plates 1 are rectangular in shape. One group of spoiler plates 2 are fixedly connected to the inner wall of the air-powder mixing channel. The spoiler plates 2 are curved in shape. One group of spoiler plates 2 is arranged between the two groups of spoiler plates 1.

[0008] Preferably, the auxiliary air mechanism includes an air supply duct, the air outlet of the air supply duct penetrates the inner wall of the air-powder meeting channel and extends to the interior of the air-powder meeting channel, an auxiliary fan is installed on the inner wall of the air supply duct, a baffle is rotatably connected at the air outlet of the air supply duct, and a control valve is provided near the air inlet of the air supply duct.

[0009] Preferably, a barrier net is provided on the inner wall of the air supply duct, the barrier net is close to the air outlet of the air supply duct, a sealing gasket is provided on the outer side of the baffle, a sealing groove is opened on the inner side of the air supply duct, and the sealing gasket cooperates with the sealing groove.

[0010] Preferably, the coal powder collecting mechanism includes a collecting box, which is arranged on the outside of the air-powder meeting channel, and a rubber ring is arranged on the inside of the collecting box, and a push rod is slidably connected to the inner side of the rubber ring, and the end of the push rod located inside the collecting box is fixedly connected to a connecting block, and the bottom of the connecting block is fixedly connected to a cleaning cotton, and the bottom of the cleaning cotton is in contact with the collecting box, and a disassembly assembly is arranged on the outside of the collecting box, and the disassembly assembly is used for disassembling the collecting box.

[0011] Preferably, the disassembly assembly includes two fixed blocks and two connecting blocks, the two fixed blocks are respectively fixedly connected to the two sides of the outside of the collection box, the two connecting blocks are fixedly connected to the outside of the wind and powder meeting channel, the fixed block is fixedly connected to a guide rod on the side close to the connecting block, the outside of the guide rod is slidably connected to a card block, the card block is inserted into the inner wall recess of the connecting block, a spring is arranged between the fixed block and the card block, and the spring is sleeved on the outside of the guide rod.

[0012] Preferably, the static elimination mechanism includes a conductive part, a conductive silicone pad is provided on the inner side of the conductive part, the conductive silicone pad is fixedly connected to the outer side of the air-powder meeting channel, a connecting sleeve is fixedly connected to the outer side of the conductive part, a connecting rod is threadedly connected to the inner wall of the connecting sleeve, and a wire cable is installed at the bottom of the connecting rod.

[0013] Preferably, an arc-shaped groove is provided on the inner side of the conductive silicone pad, the inner side of the arc-shaped groove contacts the outer side of the wind-powder meeting channel, and a fixed plug rod is fixedly connected to the bottom of the wire cable.

[0014] Preferably, a plurality of air ducts are arranged on the outer side of the discharge pipe, and the plurality of air ducts are distributed at equal distances.

[0015] Preferably, the side of the air-powder mixing channel is connected to a primary air duct via a flange.

[0016] The present invention provides an air-powder mixer for optimizing auxiliary air distribution of a powder making system. It has the following beneficial effects:

[0017] 1. The invention facilitates the full diffusion of the air-powder mixture when it enters initially through the large opening end of the air-powder mixing channel, and cooperates with the mixing effect of the spoiler to enable more air-powder to participate in the early full contact and mixing process. The small opening end plays a certain role in gathering and accelerating the mixed air-powder, allowing it to enter the primary air duct in a more suitable state and speed, further ensuring the uniformity and stability of the air-powder mixture, effectively reducing energy loss, improving the overall performance and reliability of the system, and making the combustion process more efficient and stable.

[0018] 2. The present invention collects a small amount of coal powder attached to the inner wall of the channel where the air and powder meet, so as to prevent the accumulation of coal powder from affecting the normal flow and mixing effect of the air and powder in the channel, thereby ensuring the stability and continuity of the system operation. By pushing the card block to overcome the elastic force of the spring and disengage the card block from the concave hole of the connecting block, the collection box can be quickly disassembled for thorough cleaning, which greatly reduces the difficulty and time cost of maintenance. When coal powder accumulation causes observation obstruction, the connecting block is used to drive the push rod and cleaning cotton to clean the coal powder, so that the accumulation status can be understood in time and the blockage can be cleared, which effectively improves the reliability and operability of the equipment and extends the service life of the equipment.

[0019] 3. The present invention uses a conductive silicone pad to fit tightly to the outside of the air-powder meeting channel, efficiently conducts static electricity to the conductive part, and then conducts it to the fixed plug rod through the connecting sleeve, connecting rod and wire cable and then leads it to the ground. This complete static electricity conduction link effectively avoids static electricity accumulation, greatly reduces the probability of serious safety hazards such as coal powder spontaneous combustion or explosion, creates a safe and stable operating environment for the air-powder mixing system, reduces equipment damage and downtime maintenance caused by static electricity problems, and ensures the continuity and efficiency of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the present invention;

[0021] Figure 2 is a side view of the present invention;

[0022] Figure 3 It is a cross-sectional view of the air delivery duct of the present invention;

[0023] Figure 4 It is a cross-sectional schematic diagram of the wind-powder meeting channel of the present invention;

[0024] Figure 5 For the present invention Figure 4 A in the enlarged view;

[0025] Figure 6 It is a schematic diagram of the auxiliary wind mechanism structure of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the coal powder collecting mechanism of the present invention;

[0027] Figure 8 It is a schematic diagram of the connection block structure of the present invention;

[0028] Fig. 9 It is a schematic diagram of the structure of the static elimination mechanism of the present invention.

[0029] Among them, 1. conveying air channel; 2. air-powder meeting channel; 3. air-powder mixing channel; 4. feeding pipe; 401. air induction channel; 5. primary air duct; 6. spoiler mechanism; 601. spoiler 1; 602. spoiler 2; 7. auxiliary air mechanism; 701. air supply pipe; 702. auxiliary fan; 703. barrier net; 704. baffle; 705. sealing pad; 706. sealing groove; 707. control valve; 8. coal powder collecting mechanism ;801, collecting box; 802, pushing rod; 803, connecting block; 804, cleaning cotton; 805, rubber ring; 806, fixing block; 807, connecting block; 808, guide rod; 809, spring; 8010, clamping block; 9, static electricity elimination mechanism; 901, conductive part; 902, conductive silicone pad; 903, arc groove; 904, connecting sleeve; 905, connecting rod; 906, wire cable; 907, fixing plug rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 9The embodiment of the present invention provides an air-powder mixer for optimizing the auxiliary air distribution of the pulverizing system, including a conveying air channel 1 and a feeding pipe 4. The conveying air channel 1 provides a stable conveying power source for air-powder mixing, ensuring that the wind can continuously enter the air-powder meeting channel 2, so that the entire air-powder mixing process can be smoothly started and maintained. The top of the air-powder meeting channel 2 is connected to the bottom of the feeding pipe 4, and the feeding pipe 4 transports the coal powder to the air-powder meeting channel 2. The side of the conveying air channel 1 is connected to the air-powder meeting channel 2, which is the key place where the coal powder and the conveying air first contact and are initially mixed. Its reasonable layout and connection relationship enable the wind and powder to begin to interact in a relatively concentrated space, promoting the initial entrainment and dispersion of the wind on the coal powder. The inner wall of the air-powder mixing channel 3 is provided with a spoiler mechanism 6, which significantly enhances the air-powder mixing effect. The outer side of the air-powder meeting channel 2 is provided with an auxiliary air mechanism 7, which can flexibly adjust the air-powder mixing ratio or enhance the mixing effect according to actual needs. A coal powder collecting mechanism 8 is provided on the outside of the air-powder meeting channel 2 to effectively collect a small amount of coal powder attached to the inner wall of the air-powder meeting channel 2 to prevent the accumulation of coal powder from adversely affecting the normal flow and mixing of air and powder in the channel. A static electricity elimination mechanism 9 is provided on the outside of the air-powder meeting channel 2, which is tightly attached to the outside of the air-powder meeting channel 2 through a conductive silicone pad 902, efficiently conducts static electricity to the conductive member 901, and then conducts it to the fixed plug 907 through the connecting sleeve 904, the connecting rod 905 and the wire cable 906 and leads it to the ground, forming a complete static electricity conduction link.

[0032] The side of the air-powder meeting channel 2 is connected to the air-powder mixing channel 3. The opening of the air-powder mixing channel 3 at one end close to the air-powder meeting channel 2 is large, and the opening at the other end away from the air-powder meeting channel 2 is small. The large opening is conducive to the full diffusion of the air-powder mixture when it initially enters and cooperates with the spoiler to enable more air and powder to fully contact and mix. The small opening accelerates the gathering of the mixed air and powder, and enters the primary air duct 5 in a suitable state and speed, thereby ensuring uniformity and stability, reducing energy loss, improving the overall performance and reliability of the system, and making combustion more efficient and stable.

[0033] The spoiler mechanism 6 comprises two groups of spoilers 1 601 and one group of spoilers 2 602, the two groups of spoilers 1 601 are all fixedly connected to the inner wall of the air-powder mixing channel 3, the spoiler 1 601 is a rectangular shape, the one group of spoilers 2 602 are all fixedly connected to the inner wall of the air-powder mixing channel 3, the spoiler 2 602 is a curved shape, and one group of spoilers 2 602 is arranged between the two groups of spoilers 1 601. The two groups of spoilers 1 601 can directly produce a significant blocking effect on the air-powder mixture entering the air-powder mixing channel 3, so that the air-powder mixture cannot flow smoothly in a straight line, is forced to change the flow direction, and is divided into multiple tributaries in different directions. The air-powder will also change its speed in the process of colliding with spoiler 1 601, because the angle and intensity of the air-powder in different positions colliding with spoiler 1 601 are different, and the change amount of speed is also inconsistent, which aggravates the relative motion between the air-powder. For example, the speed of the wind powder colliding near the center of spoiler 1 601 may drop to zero instantly and then reverse, while the wind powder at the edge may only slightly change the direction of speed. This speed difference causes the wind powder to rub and interweave with each other, so the initial mixing effect is significantly improved, creating favorable conditions for subsequent more sufficient mixing. A set of curved spoiler 2 602 is located between the two sets of spoiler 1 601. Its unique curved surface can create complex vortices and turns when the wind powder flows through. When the wind powder flow diverted by spoiler 1 601 reaches spoiler 2 602, due to its curved shape, the wind powder will flow along the curved surface and generate vortices. These vortices cause the wind powder to form a strong circulation flow in the local area, further disrupting the flow trajectory of the wind powder that has been changed by spoiler 1 601.

[0034] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6The auxiliary wind mechanism 7 includes an air supply pipe 701, the air outlet of the air supply pipe 701 penetrates the inner wall of the air-powder meeting channel 2, and extends to the inside of the air-powder meeting channel 2. The air supply pipe 701 serves as a conveying channel for auxiliary wind, introduces external air into the air-powder meeting channel 2, and realizes additional supplementation of air flow in the air-powder mixing process. An auxiliary fan 702 is installed on the inner wall of the air supply pipe 701. The auxiliary fan 702 provides a power source for the conveying of auxiliary wind, ensures that the auxiliary wind can smoothly enter the air-powder meeting channel 2 and fully mix with the air-powder. By adjusting the rotation speed of the auxiliary fan 702, the air volume of the auxiliary wind can be accurately controlled to realize dynamic regulation of the air-powder mixing process. A baffle 704 is rotatably connected at the air outlet of the air supply pipe 701. When the auxiliary wind is not needed, the baffle 704 closes the air outlet of the air supply pipe 701 in a natural state, preventing the air powder in the air-powder meeting channel 2 from flowing back into the air supply pipe 701, and protecting the internal equipment of the air supply pipe 701 from being eroded and blocked by the air powder. When auxiliary wind is needed, the auxiliary wind can blow open the baffle 704, allowing the wind to enter the channel smoothly. This design not only ensures the sealing of the air supply pipe 701 in a non-working state, but also realizes smooth air flow in a working state, thereby improving the reliability and operational convenience of the auxiliary wind mechanism. A control valve 707 is provided near the air inlet of the air supply pipe 701. The control valve 707 is used to control the on-off and flow rate of the auxiliary wind. By adjusting the opening of the control valve 707, the amount of air entering the air supply pipe 701 is controlled, thereby adjusting the air volume and air pressure of the auxiliary wind in the air-powder meeting channel 2.

[0035] See also Figure 4-Figure 5 The inner wall of the air supply pipe 701 is provided with a barrier net 703, which is close to the air outlet of the air supply pipe 701, and prevents coal powder from entering the air supply pipe 701. A sealing gasket 705 is provided on the outer side of the baffle 704, and a sealing groove 706 is provided on the inner side of the air supply pipe 701. The sealing gasket 705 cooperates with the sealing groove 706. When the baffle 704 is closed, it can effectively prevent the gas leakage in the air-powder meeting channel 2, ensuring that the air outlet of the air supply pipe 701 is in a good sealing state.

[0036] See also Figure 1 , Figure 2 , Figure 3 , 7 and Figure 8The coal powder collecting mechanism 8 includes a collecting box 801, which is arranged on the outside of the wind-powder meeting channel 2. The collecting box 801 is arranged on the outside of the wind-powder meeting channel 2, and can catch a small amount of coal powder that falls under the action of gravity after being attached to the inner wall of the wind-powder meeting channel 2 due to various reasons (such as airflow disturbance, electrostatic adsorption, etc.), effectively preventing the coal powder from accumulating in the wind-powder meeting channel 2, and preventing excessive accumulation of coal powder from affecting the normal flow state and mixing effect of the wind-powder. The collecting box 801 is made of transparent material, so that it is easy to understand the blockage of the coal powder by looking at the collecting box 801. A rubber ring 805 is arranged on the inner side of the collecting box 801, and the rubber ring 805 plays a sealing role to prevent the coal powder in the collecting box 801 from leaking out from the gap between the push rod 802 and the collecting box 801, and to prevent the coal powder from scattering and polluting the surrounding environment. The inner side of the rubber ring 805 is slidably connected with a push rod 802. When the coal powder at the bottom of the collection box 801 needs to be cleaned, the operator applies force to the connection block 803, and the push rod 802 can effectively transfer the external force to the cleaning cotton 804, driving the cleaning cotton 804 to slide at the bottom of the collection box 801, thereby realizing the cleaning action of the coal powder. The end of the push rod 802 located inside the collection box 801 is fixedly connected with a connection block 803, and the connection block 803 plays a connecting role. The push rod 802 moves, and then drives the cleaning cotton 804 to move. The bottom of the connection block 803 is fixedly connected with a cleaning cotton 804, and the bottom of the cleaning cotton 804 contacts the collection box 801. Driven by the push rod 802, it can slide in the collection box 801. By using its own softness and adsorption characteristics, the coal powder at the bottom of the collection box 801 can be effectively cleaned to one side, so as to observe the blockage state of the coal powder.

[0037] See also Figure 1 , Figure 2 , Figure 3 and Figure 7, a disassembly assembly is provided on the outside of the collection box 801, and the disassembly assembly is used to disassemble the collection box 801, so that when the coal powder in the collection box 801 accumulates to a certain extent and needs to be thoroughly cleaned or the collection box 801 needs to be inspected and repaired, it can be easily disassembled. The disassembly assembly includes two fixed blocks 806 and two connecting blocks 807. The two fixed blocks 806 are fixedly connected to the two sides of the outside of the collection box 801, respectively, and the fixed blocks 806 provide support positions for the guide rods 808 and the springs 809. The two connecting blocks 807 are fixedly connected to the outside of the wind-powder meeting channel 2, and the concave holes of the connecting blocks 807 provide plug-in positions for the card blocks 8010. The fixed block 806 is fixedly connected to a guide rod 808 on one side of the connecting block 807, and the guide rod 808 provides a guide for the sliding of the card blocks 8010. When the card blocks 8010 slide on the guide rod 808, they can always move in a predetermined direction, ensuring that they can be accurately inserted into or out of the inner wall concave holes of the connecting blocks 807 during the installation and disassembly process. The guide rod 808 is externally slidably connected with a card block 8010, which is inserted into the inner wall concave hole of the connection block 807. The card block 8010 is inserted into the inner wall concave hole of the connection block 807, and is a key component for realizing a stable connection between the collection box 801 and the wind-powder meeting channel 2. In a normal installation state, the card block 8010 is inserted into the concave hole of the connection block 807, and the cooperation between the card block 8010 and the concave hole effectively prevents the collection box 801 from accidentally falling off outside the wind-powder meeting channel 2, thereby ensuring that the collection box 801 can stably collect coal powder. When the collection box 801 needs to be disassembled, the card block 8010 is separated from the concave hole through corresponding operations, and the locking state of the collection box 801 can be released. A spring 809 is arranged between the fixing block 806 and the clamping block 8010, and the spring 809 is sleeved on the outside of the guide rod 808. When the collecting box 801 is installed, after the clamping block 8010 is inserted into the recessed hole of the connecting block 807, the spring 809 is in a compressed state, and it will exert an outward elastic force on the clamping block 8010, so that the clamping block 8010 can fit more closely in the recessed hole, further enhancing the stability of the connection.

[0038] See also Figure 1 , Figure 2 , Figure 3 and Fig. 9The static elimination mechanism 9 includes a conductive member 901. As a key conductive component in the entire static elimination mechanism 9, the conductive member 901 plays a connecting role and can receive static electricity conducted from the conductive silicone pad 902. Through the connecting sleeve 904, the connecting rod 905, and the wire cable 906, a complete static electricity conduction path is formed to ensure that the static electricity generated on the wind-powder meeting channel 2 can be orderly discharged, effectively avoiding the accumulation of static electricity in the system, thereby ensuring the safe and stable operation of the entire powder making system. A conductive silicone pad 902 is arranged on the inner side of the conductive member 901. The conductive silicone pad 902 is fixedly connected to the outer side of the wind-powder meeting channel 2. The conductive silicone pad 902 has good conductivity and can achieve close contact with the wind-powder meeting channel 2. This allows the static electricity generated on the surface of the wind-powder meeting channel 2 due to friction of coal powder and other reasons to be quickly and efficiently conducted to the conductive silicone pad 902, and then transferred to the conductive member 901, ensuring the timeliness and effectiveness of static electricity collection. The outer side of the conductive member 901 is fixedly connected with a connecting sleeve 904, and the inner wall of the connecting sleeve 904 is threadedly connected with a connecting rod 905. The connecting rod 905 is connected to the connecting sleeve 904, and plays the role of transitional conduction of static electricity between the conductive member 901 and the wire cable 906. It stably transfers the static electricity received from the conductive member 901 to the wire cable 906, ensuring the continuity of the static electricity conduction process. The bottom of the connecting rod 905 is installed with a wire cable 906. As an important component of static electricity conduction, it can transmit the static electricity transmitted from the connecting rod 905 over a long distance, and guide the static electricity from the location of the wind-powder meeting channel 2 to a suitable grounding position.

[0039] See also Fig. 9 An arc-shaped groove 903 is provided on the inner side of the conductive silicone pad 902, and the inner side of the arc-shaped groove 903 contacts the outer side of the wind-powder meeting channel 2. The shape of the arc-shaped groove 903 can better fit the cylindrical outer wall of the wind-powder meeting channel 2, and compared with the plane contact, the actual contact area between the two is significantly increased. A fixed plug 907 is provided at the bottom of the wire cable 906, and its main function is to be inserted into the ground to form a reliable grounding connection. The static electricity conducted by the wire cable 906 is directly released into the ground through the fixed plug 907. As a huge charge container, the ground can permanently eliminate static electricity and completely avoid the accumulation of static electricity in the wind-powder mixing system.

[0040] See also Figure 1-Figure 2 A plurality of induced air channels 401 are arranged on the outside of the feeding pipe 4, and the plurality of induced air channels 401 are distributed at equal distances. The induced air channels 401 can introduce airflow, and these airflows form a downward airflow environment on the outside of the feeding pipe 4. When the coal powder falls in the feeding pipe 4, the airflow on the outside can produce a "wrapping" guiding effect on the coal powder, just like in a pipe with a breeze blowing downward, the material will fall more smoothly.

[0041] See also Figure 1-Figure 3 The side of the air-powder mixing channel 3 is connected to a primary air duct 5 through a flange. The primary air duct 5 allows the air-powder mixture that is fully mixed and statically eliminated through the air-powder mixing channel 3 to be transported to subsequent process links such as combustion.

[0042] Working principle: Coal powder falls by gravity through the feeding pipe 4, and the conveying air enters the air-powder meeting channel 2 from the conveying air channel 1. In the air-powder meeting channel 2, the falling coal powder initially contacts the conveying air, and the conveying air carries the coal powder and begins to mix initially and flows toward the air-powder mixing channel 3. The multiple air induced channels 401 outside the feeding pipe 4 can introduce additional airflow, which helps the coal powder to enter the air-powder meeting channel 2 more smoothly and promotes mixing with the conveying air, thereby avoiding blockage or uneven falling of the coal powder during the falling process.

[0043] When the air-powder mixture enters the air-powder mixing channel 3, the air-powder mixture has a large space to diffuse here because the opening of the air-powder mixing channel 3 near the end of the air-powder meeting channel 2 is large. At this time, the two groups of spoilers 1 601 are rectangular and are set perpendicular to the mainstream direction of the air-powder mixture, which significantly blocks and diverts it. The air-powder is forced to change its flow direction and is divided into multiple strands. The speed is also changed by the collision with the spoiler 1 601, and the relative movement between the air-powder is intensified, and the initial mixing effect is significantly improved. Then, the curved spoiler 2 602 between the two groups of spoilers 1 601 further plays a role. Its curved surface causes the air-powder to produce complex vortices and turns when it flows through. The air-powder originally diverted by the spoiler 1 601 is disrupted again. Under the action of multiple forces, the air-powder fully contacts and collides in the complex flow field, and the air-powder in different areas is fully mixed. The mixing uniformity and effect are greatly improved, thereby ensuring the stable and efficient subsequent combustion process.

[0044] The air supply pipe 701 of the auxiliary air mechanism 7 can introduce additional auxiliary air. When it is necessary to adjust the air-powder mixing ratio or enhance the mixing effect, the control valve 707 is opened. Under the action of the auxiliary fan 702, the external air enters the air-powder meeting channel 2 through the air supply pipe 701. The auxiliary wind will blow open the baffle 704. The barrier net 703 in the air supply pipe 701 can prevent coal powder from entering the inside of the air supply pipe 701. When the auxiliary fan 702 and the control valve 707 are closed, the baffle 704 will be closed accordingly. The baffle 704 cooperates with the sealing gasket 705 and the sealing groove 706 to keep the air outlet of the air supply pipe 701 closed.

[0045] During the operation of the air-powder meeting channel 2, a small amount of coal powder may adhere to the inner wall of the air-powder meeting channel 2 for various reasons. At this time, the coal powder collecting mechanism 8 takes effect, and the attached coal powder falls into the collection box 801 under the action of gravity. By pushing the block 8010 toward the collection box 801, the block 8010 is disengaged from the inner wall concave hole of the connecting block 807, and the elastic force of the spring 809 is overcome, and the collection box 801 can be disassembled for thorough cleaning. When the bottom of the collection box 801 is blocked by coal powder and the state of coal powder accumulation cannot be seen clearly, by pulling the connecting block 803, the connecting block 803 drives the push rod 802 and the cleaning cotton 804 at the bottom to slide in the collection box 801, and the cleaning cotton 804 cleans the coal powder at the bottom of the collection box 801 to one side, so that the blockage state of the coal powder can be observed.

[0046] During the air-powder conveying and mixing process, static electricity may be generated due to the friction between the coal powder and the pipeline, air, etc., and the static electricity elimination mechanism 9 can eliminate static electricity. The conductive silicone pad 902 is in close contact with the outside of the air-powder meeting channel 2, and the static electricity on the air-powder meeting channel 2 is conducted to the conductive member 901. The conductive member 901 conducts the static electricity to the fixed plug 907 through the connecting sleeve 904, the connecting rod 905 and the wire cable 906, and finally conducts the static electricity to the ground, preventing the safety hazards caused by the accumulation of static electricity, such as the dangerous situations such as the spontaneous combustion or explosion of coal powder, and ensuring the safe and stable operation of the air-powder mixing system.

[0047] The air-powder mixture after being fully mixed and static electricity eliminated is output through the primary air duct 5 connected to the flange on the side of the air-powder mixing channel 3, providing a suitable air-powder mixture for subsequent process links such as combustion.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wind-powder mixer for optimizing auxiliary air distribution of a powder making system, comprising a conveying air channel (1) and a feeding pipe (4), characterized in that: The side of the conveying air channel (1) is connected to an air-powder meeting channel (2), the side of the air-powder meeting channel (2) is connected to an air-powder mixing channel (3), the top of the air-powder meeting channel (2) is connected to the bottom of the feeding pipe (4), the inner wall of the air-powder mixing channel (3) is provided with a turbulent mechanism (6), the outer side of the air-powder meeting channel (2) is provided with an auxiliary air mechanism (7), the outer side of the air-powder meeting channel (2) is provided with a coal powder collecting mechanism (8), and the outer side of the air-powder meeting channel (2) is provided with a static electricity elimination mechanism (9); The wind-powder mixing channel (3) has a larger opening at one end close to the wind-powder meeting channel (2), and a smaller opening at one end away from the wind-powder meeting channel (2); The spoiler mechanism (6) comprises two groups of spoiler plates 1 (601) and one group of spoiler plates 2 (602), the two groups of spoiler plates 1 (601) are fixedly connected to the inner wall of the air-powder mixing channel (3), the spoiler plates 1 (601) are rectangular in shape, one group of spoiler plates 2 (602) are fixedly connected to the inner wall of the air-powder mixing channel (3), the spoiler plates 2 (602) are curved in shape, and one group of spoiler plates 2 (602) is arranged between the two groups of spoiler plates 1 (601).

2. The air-powder mixer for optimizing auxiliary air distribution of a powder making system according to claim 1, characterized in that: The auxiliary air mechanism (7) comprises an air supply pipe (701), the air outlet of the air supply pipe (701) penetrates the inner wall of the air-powder meeting channel (2) and extends to the interior of the air-powder meeting channel (2), an auxiliary fan (702) is installed on the inner wall of the air supply pipe (701), a baffle (704) is rotatably connected at the air outlet of the air supply pipe (701), and a control valve (707) is arranged near the air inlet of the air supply pipe (701).

3. The air-powder mixer for optimizing auxiliary air distribution of a powder making system according to claim 2, characterized in that: The inner wall of the air supply pipe (701) is provided with a barrier net (703), the barrier net (703) is close to the air outlet of the air supply pipe (701), the outer side of the baffle (704) is provided with a sealing gasket (705), the inner side of the air supply pipe (701) is provided with a sealing groove (706), and the sealing gasket (705) cooperates with the sealing groove (706).

4. The air-powder mixer for optimizing auxiliary air distribution of a powder making system according to claim 1, characterized in that: The coal powder collecting mechanism (8) comprises a collecting box (801), the collecting box (801) being arranged on the outside of the air-powder meeting channel (2), a rubber ring (805) being arranged on the inside of the collecting box (801), a push rod (802) being slidably connected to the inside of the rubber ring (805), an end of the push rod (802) located inside the collecting box (801) being fixedly connected to a connecting block (803), a cleaning cotton (804) being fixedly connected to the bottom of the connecting block (803), the bottom of the cleaning cotton (804) being in contact with the collecting box (801), and a disassembly component being arranged on the outside of the collecting box (801), the disassembly component being used for disassembling the collecting box (801).

5. The air-powder mixer for optimizing auxiliary air distribution of a powder making system according to claim 4, characterized in that: The disassembly assembly comprises two fixed blocks (806) and two connecting blocks (807), the two fixed blocks (806) are respectively fixedly connected to the two sides of the outside of the collection box (801), the two connecting blocks (807) are fixedly connected to the outside of the air-powder meeting channel (2), the fixed block (806) is fixedly connected to a guide rod (808) on one side close to the connecting block (807), the outside of the guide rod (808) is slidably connected to a clamping block (8010), the clamping block (8010) is inserted into the inner wall recessed hole of the connecting block (807), a spring (809) is arranged between the fixed block (806) and the clamping block (8010), and the spring (809) is sleeved on the outside of the guide rod (808).

6. The air-powder mixer for optimizing auxiliary air distribution of a powder making system according to claim 1, characterized in that: The static elimination mechanism (9) comprises a conductive member (901), a conductive silicone pad (902) is arranged on the inner side of the conductive member (901), the conductive silicone pad (902) is fixedly connected to the outer side of the air-powder meeting channel (2), a connecting sleeve (904) is fixedly connected to the outer side of the conductive member (901), a connecting rod (905) is threadedly connected to the inner wall of the connecting sleeve (904), and a wire cable (906) is installed at the bottom of the connecting rod (905).

7. The air-powder mixer for optimizing auxiliary air distribution of a powder making system according to claim 6, characterized in that: An arc-shaped groove (903) is provided on the inner side of the conductive silicone pad (902), the inner side of the arc-shaped groove (903) is in contact with the outer side of the wind-powder meeting channel (2), and a fixed plug rod (907) is fixedly connected to the bottom of the wire cable (906).

8. The air-powder mixer for optimizing auxiliary air distribution of a powder making system according to claim 1, characterized in that: A plurality of air induction channels (401) are arranged on the outer side of the discharge pipe (4), and the plurality of air induction channels (401) are distributed at equal distances.

9. The air-powder mixer for optimizing auxiliary air distribution of a powder making system according to claim 1, characterized in that: The side of the air-powder mixing channel (3) is connected to a primary air duct (5) via a flange.

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