Raymond mill dust removal flow guide device

Abstract

The utility model provides a kind of Raymond mill dust removal flow guide device, belong to flow guide device technical field, the Raymond mill dust removal flow guide device includes: dust removal flow guide cylinder, top collecting cover, bottom support seat, cyclone separator, flow guide vane assembly and sealing connecting ring;Dust removal flow guide cylinder is conical platform shape, dust removal flow guide cylinder is fixedly installed above the discharge port of Raymond mill by support seat;Collecting cover is hemispherical structure;Cyclone separator is arranged at the center position inside dust removal flow guide cylinder, annular passage is formed between the outer wall of cyclone separator and the inner wall of dust removal flow guide cylinder;Flow guide vane assembly includes multiple flow guide vanes, another end of flow guide vane and the inner wall of dust removal flow guide cylinder keep preset gap;Sealing connecting ring is arranged at the connecting position of dust removal flow guide cylinder and Raymond mill discharge port, solve the dust separation efficiency low in existing Raymond mill dust removal system, cause environmental pollution and resource waste, affect the air quality of production workshop problem.

Description

Technical Field

[0001] This utility model belongs to the technical field of flow guiding devices, specifically, it relates to a dust removal flow guiding device for Raymond mill. Background Technology

[0002] Raymond mills, as important powder processing equipment, are widely used in industries such as mineral processing, chemicals, building materials, and metallurgy for ultrafine grinding of various materials. During the operation of a Raymond mill, the material is ground, generating a large amount of fine dust. This dust is discharged from the mill with the working airflow. If not effectively collected and treated, it will cause serious environmental pollution. Traditional Raymond mill dust removal systems mainly use simple bag filters or cyclone separators. While these devices can handle most coarse dust particles, their collection effect on fine dust is poor, especially for ultrafine dust with a particle size of less than 10 micrometers, where the separation efficiency is often below 70%. A large amount of valuable powder is emitted into the environment with the exhaust gas, causing not only a huge waste of resources but also posing a serious threat to the surrounding environment and worker health. Existing cyclone separators, due to structural design limitations, are prone to unstable separation performance when handling airflows with high dust concentrations, especially when the dust particle size distribution is uneven, the separation efficiency will decrease significantly. Although baghouse dust collectors have a good effect on capturing fine dust, they have problems such as easy clogging of filter bags, high maintenance costs, and short service life. In particular, when dealing with dust-laden airflows with high temperature, high humidity, or certain corrosiveness, the service life of the filter bags will be further shortened. Utility Model Content

[0003] In view of this, the present invention provides a dust removal and diversion device for Raymond mills, which solves the problem of low dust separation efficiency in existing Raymond mill dust removal systems, resulting in a large amount of fine dust being discharged with the airflow, causing not only environmental pollution and resource waste, but also affecting the air quality of the production workshop and the health of workers.

[0004] This utility model is implemented as follows: This utility model provides a dust removal and flow guiding device for a Raymond mill, comprising: a dust removal guide cylinder, a top collecting hood, a bottom support base, a cyclone separator, a guide vane assembly, and a sealing connecting ring; the dust removal guide cylinder is shaped like a frustum cone, with the upper opening diameter smaller than the lower opening diameter, and a spiral guide groove is provided axially on the inner wall surface of the dust removal guide cylinder; the dust removal guide cylinder is fixedly installed above the discharge port of the Raymond mill by the support base; the collecting hood has a hemispherical structure, with a circular discharge hole at the geometric center of the collecting hood, and the collecting hood is bolted to the upper opening of the dust removal guide cylinder; the cyclone separator... The cyclone separator is located at the center of the dust removal guide tube. The main body of the cyclone separator is cylindrical, and an annular channel is formed between the outer wall of the cyclone separator and the inner wall of the dust removal guide tube. The guide vane assembly includes multiple guide vanes, which are evenly distributed along the circumference of the outer wall of the cyclone separator. Each guide vane has an arc-shaped plate structure. One end of the guide vane is fixed to the outer wall of the cyclone separator by welding, and the other end of the guide vane maintains a preset gap with the inner wall of the dust removal guide tube. The sealing connection ring is located at the connection position between the dust removal guide tube and the discharge port of the Raymond mill, and the sealing connection ring is made of rubber material.

[0005] The technical effects of the dust removal and guiding device for a Raymond mill provided by this utility model are as follows: The conical shape of the dust removal guide cylinder and the spiral guiding grooves on its inner wall effectively guide the dust-laden airflow, causing it to form a spiral trajectory within the cylinder. This increases the chance of dust particles colliding with the cylinder wall, facilitating dust separation and settling. The combined use of the cyclone separator and the guide vane assembly creates a composite separation mechanism within the dust removal guide cylinder. Through the combined effects of centrifugal force and gravity, the dust collection efficiency is significantly improved. The hemispherical structure of the top collection hood and the design of the sealing ring ensure the airtightness of the entire dust removal system, preventing dust leakage while facilitating the collection and discharge of clean airflow. The preset gap design avoids wear caused by direct contact between the guide vanes and the cylinder wall, optimizes the stability of the vortex field through a gradual gap, and ensures consistency of the gaps during mass production by the positioning and calibration components, solving the problem of decreased separation efficiency due to assembly errors in existing technologies.

[0006] Based on the above technical solution, the dust removal and diversion device for Raymond mill of this utility model can be further improved as follows: The support base includes a support base plate and a connecting flange. The support base plate has a circular plate structure, and a through hole matching the lower opening of the dust removal guide tube is opened at the geometric center of the support base plate. The connecting flange has an annular structure and is set on the upper surface of the support base plate. The connecting flange is fixed to the outer wall of the lower opening of the dust removal guide tube by bolts. The support base plate is connected to the frame of the Raymond mill by at least six evenly distributed fixing bolts.

[0007] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the design of the bottom support provides a stable installation foundation for the entire dust removal and diversion device; the circular plate structure of the support base effectively distributes the weight load of the device; and the annular structure design of the connecting flange ensures a reliable connection with the dust removal and diversion cylinder. The connection to the Raymond mill frame via at least six evenly distributed circumferential fixing bolts ensures the stability and reliability of the device during high-speed operation, avoids loosening of connections due to vibration, and improves the operational safety and service life of the equipment.

[0008] Furthermore, the top of the cyclone separator is provided with a conical guide head, the top of which is concentric with the discharge hole of the collection hood. The bottom diameter of the guide head is larger than the top diameter. The guide head is fixed to the top of the cyclone separator by a threaded connection. The surface of the guide head is provided with at least eight axially extending guide grooves, the depth of which is one-third of the wall thickness of the guide head.

[0009] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The design of the conical guide head forms a smooth transition structure at the top of the cyclone separator, effectively guiding the separated clean airflow towards the discharge port, reducing airflow turbulence and energy loss. The setting of the guide groove further optimizes the airflow distribution, ensuring stable flow characteristics as the airflow passes through the conical guide head. The concentric setting of the conical guide head and the discharge port of the top collection hood ensures the continuity and smoothness of the airflow path, improves the overall working efficiency of the dust removal system, and reduces system resistance loss.

[0010] Furthermore, the curvature angle of the arc-shaped plate structure of the guide vane is between 30-60°, the thickness of the guide vane is 3-8mm, the axial length of the guide vane is equal to the length of the cyclone separator, the installation angle of the guide vane along the outer wall of the cyclone separator is inclined at 15-45° relative to the horizontal plane, the circumferential included angle between two adjacent guide vanes is equal, and the material of the guide vane is stainless steel plate.

[0011] The beneficial effects of the above-mentioned improved scheme are as follows: the arc-shaped plate structure and specific installation angle design of the guide vanes can effectively guide and separate the dust-laden airflow entering the dust removal guide tube. By controlling the bending angle and installation tilt angle of the guide vanes, a stable spiral flow is formed in the annular channel, enhancing the centrifugal separation effect. The selection of stainless steel plate material ensures the corrosion resistance and wear resistance of the guide vanes in long-term working environments, and the uniform distribution between adjacent guide vanes ensures the uniformity and stability of airflow separation.

[0012] Furthermore, the ratio of the upper opening diameter to the lower opening diameter of the truncated cone shape of the dust removal guide tube is 0.4-0.7, the ratio of the axial height of the dust removal guide tube to the lower opening diameter is 1.2-2.0, the wall thickness of the dust removal guide tube is 5-12mm, and the dust removal guide tube is made of carbon steel.

[0013] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The optimized geometric parameter design of the truncated cone shape of the dust removal guide cylinder enables the dust-laden airflow to generate a suitable velocity gradient and pressure distribution within the cylinder, which is conducive to the effective separation of dust particles. The reasonable control of the ratio of the upper and lower opening diameters and the ratio of the axial height to the lower diameter ensures the residence time and separation space of the airflow within the cylinder, thereby improving dust removal efficiency. The selection of carbon steel material meets strength requirements while also possessing good economic efficiency; the appropriate wall thickness design ensures structural strength while controlling the weight of the equipment.

[0014] Furthermore, the spiral angle of the spiral guide groove is 20-40°, the depth of the spiral guide groove is 8-15mm, the width of the spiral guide groove is 15-25mm, the axial distance between two adjacent spiral guide grooves is 40-80mm, and the number of spiral distributions of the spiral guide groove along the inner wall surface of the dust removal guide cylinder is 3 to 6.

[0015] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The precise geometric parameter design of the spiral guide groove can generate a stable spiral guiding effect on the dust-laden airflow, causing the airflow to form a regular spiral motion trajectory on the inner wall surface of the dust collector guide cylinder. By controlling parameters such as spiral angle, depth, width, and spacing, the interaction between the airflow and the cylinder wall is optimized, increasing the contact opportunities and contact time between dust particles and the wall surface. The reasonable setting of the number of spiral turns ensures that the airflow has sufficient rotation and separation time inside the cylinder, significantly improving the dust collection efficiency and separation quality.

[0016] Furthermore, the outer surface of the hemispherical structure of the collection cover is provided with multiple heat dissipation protrusions. The heat dissipation protrusions are cylindrical in shape, with a height of 10-20mm and a diameter of 8-15mm.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the heat dissipation protrusion design on the outer surface of the top collection hood increases the contact area between the collection hood and the ambient air, improves the heat dissipation efficiency, and effectively reduces the operating temperature of the collection hood. The geometric shape and dimensional parameters of the cylindrical heat dissipation protrusion design ensure both heat dissipation effect and avoid adverse effects on airflow. Through effective heat dissipation, the service life of the top collection hood is extended, and the stability and reliability of the entire dust collection system in high-temperature operating environments are improved.

[0018] Furthermore, the bottom of the cylindrical body of the cyclone separator is provided with a conical collecting hopper, the cone angle of which is 60-90°, and a discharge port is provided at the bottom end of the collecting hopper.

[0019] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The conical collection hopper at the bottom of the cyclone separator provides an effective collection and discharge channel for the separated dust. The reasonable design of the cone angle ensures that the dust can slide smoothly under the action of gravity, avoiding the accumulation and blockage of dust in the collection hopper. The setting of the discharge port facilitates the timely discharge of separated dust, maintains the cleanliness of the inside of the cyclone separator, ensures the continuous and efficient operation of the separator, and improves the continuous operation capability of the entire dust removal system.

[0020] Furthermore, the sealing connection ring has an L-shaped cross-section, with the horizontal section of the L-shaped structure fitting against the upper surface of the Raymond mill outlet and the vertical section of the L-shaped structure fitting against the lower outer wall of the dust removal guide cylinder.

[0021] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The L-shaped cross-section design of the sealing connecting ring can form a reliable sealing connection with the Raymond mill discharge port and dust collector guide tube in both horizontal and vertical directions. The geometric characteristics of the L-shaped structure allow the sealing connecting ring to effectively adapt to the geometry of the connection part, improving the reliability of the sealing effect. The elastic properties of the rubber material can compensate for installation errors and minor deformations during equipment operation, ensuring the long-term sealing performance of the connection part and preventing dust leakage and the infiltration of outside air.

[0022] Furthermore, the inner surface of the arc-shaped plate structure of the guide vane is provided with micro-grooves, which extend along the arc direction of the guide vane. The depth of the micro-grooves is 1-3 mm and the width of the micro-grooves is 2-5 mm.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The design of micro-grooves on the inner surface of the guide vanes further enhances the interaction intensity between the airflow and the blade surface, improving the turbulence and mixing effect of the airflow. The extension design of the micro-grooves along the arc direction is coordinated with the main flow direction of the airflow, reducing unnecessary drag losses. By increasing the surface roughness and contact area of ​​the blades, the adhesion and separation effect of dust particles on the blade surface is improved, further enhancing the dust removal performance and separation accuracy of the guide vane assembly.

[0024] Compared with existing technologies, the beneficial effects of the dust collection and guiding device for Raymond mills provided by this utility model are as follows: This utility model significantly improves the dust collection efficiency of the Raymond mill dust collection system through an innovative frustum-shaped dust collection and guiding cylinder design, combined with the spiral guiding groove on the inner wall and the composite separation mechanism of the cyclone separator. The frustum-shaped dust collection and guiding cylinder creates a stable velocity gradient in the dust-laden airflow within the cylinder, creating favorable conditions for dust separation. The spiral guiding groove design causes the airflow to generate a regular spiral motion within the cylinder, increasing the collision opportunities and separation time between dust particles and the cylinder wall. The combined use of the cyclone separator and the guiding blade assembly forms a dual separation mechanism combining centrifugal force and gravity within the cylinder, effectively improving the collection capacity for fine dust particles. The hemispherical structure of the top collection hood optimizes the collection and discharge of clean airflow, reducing system resistance loss. The L-shaped design of the sealing connection ring ensures the airtightness of the system, preventing dust leakage. The entire device is compact, easy to install, and stable in operation. It can operate reliably for a long time in the working environment of Raymond mill, providing an efficient dust removal solution for the powder processing industry. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 An example diagram of a dust removal and diversion device for a Raymond mill. Figure 2 A top view of a dust removal and diversion device for a Raymond mill. Figure 3 A perspective view of a dust removal and diversion device for a Raymond mill. The attached diagram lists the components represented by each number as follows: 10. Dust removal guide tube; 11. Guide groove; 20. Collection cover; 21. Discharge hole; 30. Support base; 40. Cyclone separator; 41. Guide head; 42. Collection hopper; 43. Discharge port; 50. Guide blade assembly. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0028] like Figures 1-3The diagram shown is an example of a dust removal and flow guiding device for a Raymond mill provided by this utility model. It includes: a dust removal and flow guiding cylinder 10, a top collecting hood 20, a bottom support 30, a cyclone separator 40, a guide vane assembly 50, and a sealing connecting ring. The dust removal and flow guiding cylinder 10 is shaped like a frustum of a cone, with the upper opening diameter smaller than the lower opening diameter. A spiral guide groove 11 is axially arranged on the inner wall surface of the dust removal and flow guiding cylinder 10. The dust removal and flow guiding cylinder 10 is fixedly installed above the discharge port of the Raymond mill via the support 30. The collecting hood 20 has a hemispherical structure, with a circular discharge hole 21 at its geometric center. The collecting hood 20 is bolted to the dust removal and flow guiding cylinder 10. At the upper opening; the cyclone separator 40 is located at the center inside the dust removal guide cylinder 10. The main body of the cyclone separator 40 is cylindrical, and an annular channel is formed between the outer wall of the cyclone separator 40 and the inner wall of the dust removal guide cylinder 10; the guide vane assembly 50 includes multiple guide vanes, which are evenly distributed along the circumference of the outer wall of the cyclone separator 40. Each guide vane has an arc-shaped plate structure. One end of the guide vane is fixed to the outer wall of the cyclone separator 40 by welding, and the other end of the guide vane maintains a preset gap with the inner wall of the dust removal guide cylinder 10; the sealing connection ring is located at the connection position between the dust removal guide cylinder 10 and the discharge port of the Raymond mill, and the sealing connection ring is made of rubber material.

[0029] The preset gap between the other end of the guide vane and the inner wall of the dust collection guide cylinder is set in the following way: (1) The gap width is 5% to 15% of the radial length of the guide vane, and the absolute value is 3 mm to 8 mm, in order to balance airflow resistance and particle passage efficiency; (2) The gap gradually changes linearly along the axial direction of the dust removal guide tube, and the width of the gap at the lower end is 1.2 to 1.5 times the width of the gap at the upper end, in order to adapt to the taper change of the truncated cone tube. (3) The uniformity of the gap is achieved through a positioning calibration component, which includes: The wear-resistant ceramic gasket welded to the end of the guide vane has a thickness equal to the preset gap width; Three adjustable set screws located at the lower opening of the dust removal guide tube are used to calibrate the coaxiality of the cyclone separator during installation, so that the gap error is controlled within ±0.5 mm.

[0030] The specific operation or usage method is as follows: First, install the bottom support base on the frame above the discharge port of the Raymond mill using fixing bolts, ensuring the support base is level and stable. Then, fix the dust collector guide tube to the support base using the connecting flange, and check the sealing of the connection. Next, insert the cyclone separator into the center of the dust collector guide tube, ensuring a uniform annular channel is formed between the cyclone separator and the tube wall. Fix the guide vanes to the outer wall of the cyclone separator at the predetermined angle and position, ensuring that the installation angle of each guide vane is consistent. Install the conical guide head to the top of the cyclone separator, ensuring a secure connection using threaded connections. Attach the top collection hood to the upper opening of the dust collector guide tube, tightening the connection with bolts, and check the sealing effect between the collection hood and the guide tube. Finally, install the sealing connection ring to ensure a tight connection between the dust collector guide tube and the discharge port of the Raymond mill. During normal operation of the Raymond mill, the dust-laden airflow enters the dust removal and guiding device from the discharge port. After multi-stage separation, the clean airflow exits from the discharge port of the top collection hood, and the separated dust is periodically discharged through the discharge port at the bottom of the cyclone separator. Regularly check the sealing and tightness of all connections, and clean any accumulated dust to ensure the normal operation of the device.

[0031] In the above technical solution, the support base 30 includes a support base plate and a connecting flange. The support base plate has a circular plate structure. A through hole matching the lower opening of the dust removal guide cylinder 10 is opened at the geometric center of the support base plate. The connecting flange has an annular structure and is set on the upper surface of the support base plate. The connecting flange is fixed to the outer wall of the lower opening of the dust removal guide cylinder 10 by bolts. The support base plate is connected to the frame of the Raymond mill by at least six circumferentially evenly distributed fixing bolts.

[0032] Furthermore, in the above technical solution, a conical guide head 41 is provided on the top of the cyclone separator 40. The top of the guide head 41 is concentrically arranged with the discharge hole 21 of the collection hood 20. The bottom diameter of the guide head 41 is larger than the top diameter. The guide head 41 is fixed to the top of the cyclone separator 40 by a threaded connection. At least eight axially extending guide grooves are provided on the surface of the guide head 41. The depth of the guide grooves is one-third of the wall thickness of the guide head 41.

[0033] Furthermore, in the above technical solution, the bending angle of the arc-shaped plate structure of the guide vane is between 30-60°, the thickness of the guide vane is 3-8mm, the axial length of the guide vane is equal to the length of the cyclone separator 40, the installation angle of the guide vane along the outer wall of the cyclone separator 40 is inclined at 15-45° relative to the horizontal plane, the circumferential included angle between two adjacent guide vanes is equal, and the material of the guide vane is stainless steel plate.

[0034] Furthermore, in the above technical solution, the ratio of the upper opening diameter to the lower opening diameter of the truncated cone shape of the dust removal guide tube 10 is 0.4-0.7, the ratio of the axial height to the lower opening diameter of the dust removal guide tube 10 is 1.2-2.0, the wall thickness of the dust removal guide tube is 5-12mm, and the dust removal guide tube 10 is made of carbon steel.

[0035] Furthermore, in the above technical solution, the spiral angle of the spiral guide groove 11 is 20-40°, the depth of the spiral guide groove 11 is 8-15mm, the width of the spiral guide groove 11 is 15-25mm, the axial distance between two adjacent spiral guide grooves 11 is 40-80mm, and the spiral guide groove 11 is distributed spirally along the inner wall surface of the dust removal guide cylinder 10 in 3 to 6 turns.

[0036] Furthermore, in the above technical solution, the outer surface of the hemispherical structure of the collection cover 20 is provided with multiple heat dissipation protrusions. The heat dissipation protrusions are cylindrical in shape, with a height of 10-20mm and a diameter of 8-15mm.

[0037] Furthermore, in the above technical solution, a conical collecting hopper 42 is provided at the bottom of the cylindrical body of the cyclone separator. The cone angle of the collecting hopper 42 is 60-90°, and a discharge port 43 is opened at the bottom end of the collecting hopper 42.

[0038] Furthermore, in the above technical solution, the cross-sectional shape of the sealing connecting ring is an L-shaped structure. The horizontal section of the L-shaped structure is in contact with the upper surface of the Raymond mill discharge port, and the vertical section of the L-shaped structure is in contact with the lower outer wall of the dust removal guide cylinder 10.

[0039] Furthermore, in the above technical solution, the inner surface of the arc-shaped plate structure of the guide vane is provided with micro-grooves, the micro-grooves extend along the arc direction of the guide vane, the depth of the micro-grooves is 1-3mm, and the width of the micro-grooves is 2-5mm.

[0040] First embodiment: The dust collection guide cylinder in this embodiment is made of high-quality Q235B carbon steel. The cylinder is shaped like a truncated cone, with an upper opening diameter of 400 mm, a lower opening diameter of 800 mm, an axial height of 1200 mm, and a wall thickness of 8 mm. The inner wall of the dust collection guide cylinder has four spiral guide grooves along the axial direction, with a spiral angle of 30 degrees, a groove depth of 12 mm, a groove width of 20 mm, and an axial spacing of 60 mm between adjacent grooves. The top collection hood is made of 304 stainless steel, has a hemispherical structure, an outer diameter of 450 mm, a wall thickness of 6 mm, and a circular discharge hole with a diameter of 150 mm at the top center. Twelve cylindrical heat dissipation protrusions are evenly distributed on the outer surface of the collection hood, each protrusion being 15 mm high and 12 mm in diameter. The bottom support includes a circular support base plate and a connecting flange. The support base plate is made of cast iron, with a diameter of 1000 mm, a thickness of 25 mm, and a central through-hole diameter of 820 mm. The connecting flange is made of steel plate machined into a ring structure, with an inner diameter of 800 mm, an outer diameter of 900 mm, and a height of 80 mm. The main body of the cyclone separator is cylindrical, made of 316L stainless steel, with a diameter of 300 mm, a height of 1000 mm, and a wall thickness of 5 mm. A conical guide head is installed at the top of the cyclone separator. The conical guide head is made of 304 stainless steel, with a top diameter of 100 mm, a bottom diameter of 300 mm, and a height of 200 mm. Eight axial guide grooves are provided on its surface, each groove being 3 mm deep and 8 mm wide. The guide vane assembly includes eight arc-shaped guide vanes, each made of 5 mm thick stainless steel plate, with an arc bending angle of 45 degrees, an axial length of 1000 mm, and an installation tilt angle of 30 degrees. The inner surface of the guide vanes has fine grooves, 2 mm deep and 3 mm wide, evenly distributed along the arc direction of the vanes. The sealing ring is made of nitrile rubber, with an L-shaped cross-section. The horizontal section is 50 mm wide, the vertical section is 40 mm high, and the cross-sectional thickness is 10 mm. During the operation of the Raymond mill, the dust-laden airflow enters the dust removal guide device at a flow rate of 15 cubic meters per minute. The airflow contains limestone dust with a concentration of 8 grams per cubic meter, and the dust particles range in size from 1 micrometer to 100 micrometers. After entering the truncated cone-shaped dust removal guide cylinder, the dust-laden airflow forms a spiral motion under the guidance of the spiral guide groove. Simultaneously, due to the contraction of the cylinder cross-section, the airflow velocity gradually increases. When the airflow reaches the vicinity of the cyclone separator, the rotation effect is further enhanced by the guide vanes. The dust particles are separated under centrifugal force and slide down the cylinder wall into the collection system. The separated clean airflow is guided by the conical guide head and smoothly discharged from the discharge hole of the top collection hood. Throughout the separation process, the overall separation efficiency of the device for dust reaches over 96%, with a separation efficiency of up to 99% for dust particles larger than 10 micrometers and over 90% for fine dust particles between 1 and 10 micrometers in diameter.During operation, the resistance loss is controlled below 800 Pascals, meeting the normal operating requirements of the Raymond mill. Thanks to the use of corrosion-resistant stainless steel for key components, the unit can operate stably for extended periods in environments containing corrosive dust, with a designed service life exceeding 10 years.

[0041] Second embodiment: This embodiment improves and optimizes the bottom structure of the cyclone separator based on the first embodiment. A conical collecting hopper is added to the bottom of the cylindrical body of the cyclone separator. The conical collecting hopper is made of 316L stainless steel, with a cone angle of 75 degrees and a height of 300 mm. The top inner diameter is the same as the inner diameter of the cyclone separator body, which is 290 mm. A discharge port with a diameter of 80 mm is opened at the bottom. The inner surface of the conical collecting hopper is polished, and the surface roughness is controlled below Ra1.6 to ensure that the separated dust can slide down smoothly without adhering to the inner wall. An adjustable gate valve is installed at the discharge port, which is pneumatically driven and can realize automatic or manual control of dust discharge. The conical collecting hopper is connected to the cyclone separator body through a flange, and a sealing gasket is set at the connection to ensure the airtightness of the connection. Meanwhile, a vibration cleaning device is installed on the outer wall of the conical collection hopper. Driven by an electromagnetic vibrator, the vibration frequency is adjustable between 20 Hz and 100 Hz. Intermittent vibration prevents dust from agglomerating and clogging within the collection hopper. The improved device exhibits better continuous operation capability when handling highly viscous or easily agglomerated dust, resulting in smoother dust discharge, reduced manual cleaning frequency, and increased automation. The operating parameters of the vibration cleaning device can be adjusted according to the characteristics of different types of dust, making it more adaptable. The conical collection hopper further enhances the device's dust collection capacity, especially when handling high-concentration dust-laden airflows, ensuring timely discharge of separated dust and preventing dust accumulation from affecting separation efficiency.

[0042] Specifically, the principle of this invention is as follows: This device adopts a multi-stage composite separation technology, achieving efficient separation of dust-laden airflow through the synergistic effect of the dust-collecting guide cylinder, cyclone separator, and guide vane assembly. When the dust-laden airflow enters the truncated cone-shaped dust-collecting guide cylinder, the airflow velocity changes due to the gradual contraction of the cylinder cross-section, forming a velocity gradient distribution conducive to dust separation. The spiral guide grooves on the inner wall guide the airflow, causing it to form a stable spiral motion trajectory within the cylinder. This spiral motion increases the residence time and movement path of dust particles within the cylinder, increasing the probability of collision between dust particles and the cylinder wall. The cyclone separator, located at the center of the cylinder, further enhances the centrifugal separation effect of the airflow. The dust-laden airflow rotates at high speed near the outer wall of the cyclone separator, and dust particles are thrown towards the outer wall under centrifugal force, sliding down the cylinder wall and ultimately being collected. The arc-shaped plate structure and inclined installation angle design of the guide vane assembly effectively guide and accelerate the airflow, maintaining a stable spiral flow state within the annular channel. The conical guide head design optimizes the flow state of the clean airflow after separation, reducing the occurrence of eddies and backflow. The entire separation process comprehensively utilizes multiple separation mechanisms such as gravity settling, centrifugal separation, and inertial collision, forming a highly efficient composite separation system that significantly improves the collection efficiency of dust particles of various sizes.

Claims

1. A dust removal and diversion device for a Raymond mill, characterized in that, include: The system comprises a dust collector guide tube, a top collecting hood, a bottom support base, a cyclone separator, a guide vane assembly, and a sealing connecting ring. The dust collector guide tube is shaped like a frustum of a cone, with the upper opening diameter smaller than the lower opening diameter. Spiral guide grooves are axially arranged on the inner wall surface of the dust collector guide tube. The dust collector guide tube is fixedly installed above the discharge port of the Raymond mill via the support base. The collecting hood has a hemispherical structure with a circular discharge hole at its geometric center. The collecting hood is bolted to the upper opening of the dust collector guide tube. The cyclone separator is located inside the dust collector guide tube. At the center, the main body of the cyclone separator is cylindrical, and an annular channel is formed between the outer wall of the cyclone separator and the inner wall of the dust removal guide cylinder. The guide blade assembly includes multiple guide blades, which are evenly distributed along the circumference of the outer wall of the cyclone separator. Each guide blade has an arc-shaped plate structure. One end of the guide blade is fixed to the outer wall of the cyclone separator by welding, and the other end of the guide blade maintains a preset gap with the inner wall of the dust removal guide cylinder. The sealing connection ring is set at the connection position between the dust removal guide cylinder and the discharge port of the Raymond mill, and the sealing connection ring is made of rubber material.

2. The dust removal and diversion device for a Raymond mill according to claim 1, characterized in that, The support base includes a support base plate and a connecting flange. The support base plate has a circular plate structure. A through hole matching the lower opening of the dust removal guide tube is opened at the geometric center of the support base plate. The connecting flange has an annular structure and is set on the upper surface of the support base plate. The connecting flange is fixed to the outer wall of the lower opening of the dust removal guide tube by bolts. The support base plate is connected to the frame of the Raymond mill by at least six evenly distributed fixing bolts.

3. The dust removal and diversion device for a Raymond mill according to claim 2, characterized in that, The top of the hydrocyclone is provided with a conical guide head. The top of the guide head is concentric with the discharge hole of the collection hood. The bottom diameter of the guide head is larger than the top diameter. The guide head is fixed to the top of the hydrocyclone by a threaded connection. The surface of the guide head is provided with at least eight axially extending guide grooves. The depth of the guide grooves is one-third of the wall thickness of the guide head.

4. The dust removal and diversion device for a Raymond mill according to claim 3, characterized in that, The curvature angle of the arc-shaped plate structure of the guide vane is between 30-60°, the thickness of the guide vane is 3-8mm, the axial length of the guide vane is equal to the length of the cyclone separator, the installation angle of the guide vane along the outer wall of the cyclone separator is inclined at 15-45° relative to the horizontal plane, the circumferential included angle between two adjacent guide vanes is equal, and the material of the guide vane is stainless steel plate.

5. A dust removal and diversion device for a Raymond mill according to claim 4, characterized in that, The ratio of the upper opening diameter to the lower opening diameter of the truncated cone-shaped dust collector is 0.4-0.7, the ratio of the axial height of the dust collector to the lower opening diameter is 1.2-2.0, the wall thickness of the dust collector is 5-12mm, and the dust collector is made of carbon steel.

6. A dust removal and diversion device for a Raymond mill according to claim 5, characterized in that, The spiral guide groove has a spiral angle of 20-40°, a depth of 8-15mm, a width of 15-25mm, an axial distance of 40-80mm between two adjacent spiral guide grooves, and the spiral guide groove has 3 to 6 spirals distributed along the inner wall surface of the dust removal guide cylinder.

7. A dust removal and diversion device for a Raymond mill according to claim 6, characterized in that, The outer surface of the hemispherical structure of the collection cover is provided with multiple heat dissipation protrusions. The heat dissipation protrusions are cylindrical in shape, with a height of 10-20mm and a diameter of 8-15mm.

8. A dust removal and diversion device for a Raymond mill according to claim 7, characterized in that, The cylindrical body of the cyclone separator is provided with a conical collecting hopper at the bottom, the cone angle of the collecting hopper is 60-90°, and the bottom end of the collecting hopper is provided with a discharge port.

9. A dust removal and diversion device for a Raymond mill according to claim 8, characterized in that, The sealing connection ring has an L-shaped cross-section. The horizontal section of the L-shaped structure is in contact with the upper surface of the Raymond mill outlet, and the vertical section of the L-shaped structure is in contact with the lower outer wall of the dust removal guide tube.

10. A dust removal and diversion device for a Raymond mill according to claim 9, characterized in that, The inner surface of the arc-shaped plate structure of the guide vane is provided with micro-grooves. The micro-grooves extend along the arc direction of the guide vane, and the depth of the micro-grooves is 1-3mm and the width of the micro-grooves is 2-5mm.

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