A dust removal and recovery structure for magnesite processing

Abstract

The utility model relates to the field of magnesite processing technology discloses a dust removal and recovery structure for magnesite processing, include: vertical cylinder, filter bag, the filter bag is encased in the outer wall bottom end of vertical cylinder, the filter bag includes a plurality of spun yarn, a plurality of spun yarn is the plain weave structure of warp and weft weaving, first pipe hoop, the filter bag is fixedly connected through first pipe hoop with vertical cylinder, soft cylinder, the soft cylinder is encased in the outer wall top end of vertical cylinder. The dust removal and recovery structure for magnesite processing is further disturbed filter bag form through the cooperation between each part, and the reverse force realizes repeatedly patting to filter bag outer wall, forms the sustained mechanical patting effect, can effectively reduce the probability that the magnesite fine dust is accumulated in the filter bag inner wall and forms the dense powder layer, restrains the dust concretion adhesion, stably maintains the effective ventilation area of filter bag, reduces the equipment operation wind resistance, reduces the shutdown dust cleaning frequency, guarantees the continuous stable operation of dust removal equipment.

Description

Technical Field

[0001] This utility model relates to the field of magnesite processing technology, specifically to a dust removal and recovery structure for magnesite processing. Background Technology

[0002] Magnesite is a core raw material for the preparation of magnesia refractory materials, magnesium salt chemical products, and metallic magnesium products, and is widely used in metallurgy, building materials, chemicals, aerospace, and many other fields. The magnesite processing flow mainly includes crushing, grinding, screening, conveying, and calcination. During various machining processes and material transfers, a large amount of fine-particle-size, high-concentration magnesite dust is generated. This dust not only possesses the common characteristics of mineral dust—its tendency to be airborne and diffuse—but also has a certain recycling value. Direct emission of this dust would result in a significant waste of high-quality magnesite raw materials, substantially increasing the material loss costs for enterprises.

[0003] Currently, filter bags are one of the important structural components in dust collection and recovery devices used in magnesite processing. The magnesite processing industry generally uses filter bag dust collectors to purify production dust. With the advantages of high filtration accuracy, strong adaptability, and high dust removal efficiency, filter bags have become the mainstream dust collection equipment in the mineral processing field.

[0004] Existing filter bag dust collector structures for magnesite processing still have certain defects in actual use. For example, fine magnesite dust easily forms a dense powder layer on the inner wall of the filter bag, which can easily form stubborn caking after long-term operation, causing the filter bag to become clogged and reducing the air permeability area. This leads to a continuous increase in the wind resistance of the equipment, a significant decrease in the system air volume, and the need for frequent shutdowns for dust removal. The continuous dust removal stability is poor, making it difficult to adapt to the dust volume and long-term continuous operation conditions of magnesite crushing, grinding, and screening processes, resulting in insufficient overall dust removal continuity. Utility Model Content

[0005] The purpose of this invention is to provide a dust removal and recovery structure for magnesite processing to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dust removal and recovery structure for magnesite processing, comprising: a vertical cylinder, a filter bag fitted onto the bottom of the outer wall of the vertical cylinder, the filter bag comprising multiple strands of spun yarn, the multiple strands of spun yarn having a plain weave structure, a first clamp, the filter bag being fixedly connected to the vertical cylinder via the first clamp, a flexible cylinder fitted onto the top of the outer wall of the vertical cylinder, a second clamp, the flexible cylinder being fixedly connected to the vertical cylinder via the second clamp, an exhaust pipe, the exhaust pipe being inserted into the top of the inner wall of the flexible cylinder, a third clamp, the flexible cylinder being fixedly connected to the exhaust pipe via the third clamp, and a cover net, the cover net being disposed on the outside of the filter bag.

[0007] Optionally, the spinning yarn includes: spandex fiber yarn, aramid fiber yarn, the aramid fiber yarn being spirally wound around the outside of the spandex fiber yarn, and antistatic polyester fiber yarn, the antistatic polyester fiber yarn being spirally wound around the outside of the spandex fiber yarn, the antistatic polyester fiber yarn abutting against the aramid fiber yarn.

[0008] Optionally, it further includes: a cover sleeve fixed to the top end of the cover net; a ring fixed to the bottom end of the cover sleeve; and a bolt passing through the ring for fixing the cover net in place.

[0009] Optionally, it further includes: a plurality of convex balls, wherein the plurality of convex balls are fixed to the inner wall of the cover mesh.

[0010] Optionally, it further includes: a needle-punched fiber felt layer disposed on the inner wall of the filter bag, and a membrane layer disposed on the inner wall of the needle-punched fiber felt layer.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This dust removal and recovery structure for magnesite processing has the following advantages: Through the coordinated operation of various components, as the gas mixed with fine magnesite dust is discharged from the outlet pipe and injected into the filter bag through the flexible cylinder, the filter bag experiences irregular swaying during the filtration process due to factors such as uneven airflow velocity distribution, the release of constraints caused by the flexible connection formed by the flexible cylinder, and the overall micro-elasticity of the filter bag. During this swaying process, the filter bag comes into contact with the outer cover mesh, which exerts a localized reverse support force on the filter bag. The timing and magnitude of the contact force between different positions of the filter bag and the cover mesh vary randomly. This reverse force further disturbs the shape of the filter bag, resulting in repeated beating of the outer wall of the filter bag. This creates a continuous mechanical beating effect, which effectively reduces the probability of fine magnesite dust accumulating on the inner wall of the filter bag to form a dense powder layer, inhibits dust caking and adhesion, maintains the effective air permeability area of ​​the filter bag, reduces equipment operating wind resistance, reduces the frequency of downtime for dust cleaning, and ensures continuous and stable operation of the dust removal equipment.

[0012] When the equipment needs to be inspected and maintained after long-term operation, the operator can turn the bolts counterclockwise to disassemble the entire cover, then loosen the third pipe clamp and remove the soft cylinder from the bottom of the air outlet pipe. This facilitates the recovery of the fine magnesite dust accumulated inside the filter bag and allows for thorough cleaning of the filter bag, ensuring normal operation of the equipment after reassembly.

[0013] The aramid fiber yarn on the outer side of the spinning line has excellent wear resistance, and the antistatic polyester fiber yarn can prevent static electricity adsorption caused by contact friction between the filter bag and the cover mesh. The aramid fiber yarn and the antistatic polyester fiber yarn are alternately spirally wound on the outer side of the elastic spandex fiber yarn, so that the filter bag as a whole has controllable elastic deformation capability. At the same time, the multiple soft convex balls set on the inner wall of the cover mesh can effectively reduce the degree of friction and wear on the outer wall of the filter bag, and improve the service life and long-term operational stability of the filter bag.

[0014] When gas mixed with fine magnesite dust is discharged from the outlet pipe and injected into the filter bag through the flexible cylinder, the airflow first contacts the membrane layer on the inner side of the filter bag. The fine magnesite dust is intercepted by the PTFE membrane layer, and the dust cannot penetrate into the filter media matrix. It only accumulates on the surface of the membrane layer, which reduces the probability of filter bag caking and blockage from the source. The needle-punched fiber felt layer set between the membrane layer and the filter bag matrix can form a uniform and flexible support for the membrane layer, ensuring the long-term stable surface filtration effect of the filter bag. Attached Figure Description

[0015] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 2 Top sectional view of the filter bag; Figure 4 for Figure 2 A magnified schematic diagram of the structure of the spinning yarn.

[0017] In the diagram: 1. Vertical cylinder, 2. Filter bag, 3. First clamp, 4. Soft cylinder, 5. Second clamp, 6. Air outlet pipe, 7. Third clamp, 8. Spinning thread, 801. Spandex fiber thread, 802. Aramid fiber thread, 803. Antistatic polyester fiber thread, 9. Cover cylinder, 10. Ring, 11. Bolt, 12. Cover mesh, 13. Convex ball, 14. Needle-punched fiber felt layer, 15. Coating layer, 16. Dust collection and recovery device. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1 to 4 The technical solution provided by this utility model is as follows: a dust removal and recovery structure for magnesite processing, comprising: a vertical cylinder 1, a filter bag 2, the filter bag 2 being fitted onto the bottom of the outer wall of the vertical cylinder 1, the filter bag 2 comprising multi-strand spun yarn 8, the multi-strand spun yarn 8 being a plain weave structure of warp and weft, a first clamp 3, the filter bag 2 being fixedly connected to the vertical cylinder 1 through the first clamp 3, a flexible cylinder 4, the flexible cylinder 4 being fitted onto the top of the outer wall of the vertical cylinder 1, a second clamp 5, the flexible cylinder 4 being fixedly connected to the vertical cylinder 1 through the second clamp 5, an exhaust pipe 6, the exhaust pipe 6 being inserted into the top of the inner wall of the flexible cylinder 4, a third clamp 7, the flexible cylinder 4 being fixedly connected to the exhaust pipe 6 through the third clamp 7, and a cover net 12, the cover net 12 being disposed on the outside of the filter bag 2.

[0020] In the specific implementation process, it is worth noting that the vertical cylinder 1, as the connecting and supporting component in the middle section of the whole, is used to connect the upper flexible cylinder 4 and the lower filter bag 2, ensuring the overall air passage coaxiality and providing rigid support for the stable guidance of dust-laden airflow. The filter bag 2 is woven from plain weave warp and weft yarn 8, which has a dense and uniform fabric structure, good warp and weft stress consistency, and high overall structural strength. It can adapt to the reciprocating pressure deformation requirements of pulse airflow, providing the basic structural conditions for the irregular swing of the filter bag 2 and the outer wall tapping for dust removal. The first pipe clamp 3, the second pipe clamp 5, and the third pipe clamp 7 are sealing locks at the docking positions. The tight-fitting structural components adopt a metal clamp structure, made of stainless steel, which has rust-proof and corrosion-resistant properties and is suitable for dusty and humid working conditions. The inner side of the clamp is equipped with a rubber anti-slip pad, and a fastening bolt is set at one end of the clamp. Tightening the bolt can tighten the clamp and achieve a sealed connection, preventing dust-laden airflow from leaking from the assembly gap. It ensures that all dust-laden gas is guided into the filter bag 2 through the outlet pipe 6, the flexible cylinder 4, and the vertical cylinder 1 to complete the internal filtration. The outer cover mesh 12 completely surrounds the filter bag 2, which can limit and constrain the maximum expansion of the filter bag 2. At the same time, it works with the swing of the filter bag 2 to form a mechanical beating structure to achieve an auxiliary dust removal function.

[0021] Furthermore, the spinning thread 8 includes: spandex fiber thread 801, aramid fiber thread 802, the aramid fiber thread 802 spirally wound around the outside of the spandex fiber thread 801, and antistatic polyester fiber thread 803, the antistatic polyester fiber thread 803 spirally wound around the outside of the spandex fiber thread 801, with the antistatic polyester fiber thread 803 abutting against the aramid fiber thread 802.

[0022] In the specific implementation process, it is worth noting that the spinning yarn 8 in this embodiment adopts a core-sheath composite winding structure, with spandex fiber yarn 801 as the central yarn core. The spandex material has excellent micro-elastic deformation properties, which can enable the overall woven filter bag 2 to have a small amount of elastic recovery ability, effectively adapting to the expansion, depressurization and retraction deformation during pulse air intake, and alleviating the long-term alternating stress fatigue of the filter material. The outer spirally wound aramid fiber yarn 802 has high strength and abrasion resistance, which can improve the overall wear resistance and tear resistance of the filter bag 2, and resist the long-term contact friction loss between the filter bag 2 and the cover mesh 12. The antistatic polyester fiber yarn 803, which is spirally wound in the same layer and abuts against each other, is made of conductive carbon fiber and polyester filament. It has high tensile strength and eliminates static electricity on the filter bag 2 through the corona discharge and leakage effect of conductive fibers. It can form a continuous conductive network on the surface of the filter bag 2, effectively inhibiting the static adsorption and agglomeration of dust.

[0023] Furthermore, it also includes: a cover cylinder 9, which is fixed to the top of the cover net 12; a ring 10, which is fixed to the bottom of the cover cylinder 9; and a bolt 11, which passes through the ring 10 and is used to fix the cover net 12.

[0024] In the specific implementation process, it is worth noting that the circular ring 10 is an integrally installed load-bearing base. It is connected to the appropriate position of the magnesite processing dust removal equipment through the through bolts 11, which can realize detachable fixed assembly. At the same time, the detachable design facilitates the later individual disassembly and maintenance, dust cleaning and component replacement, and is suitable for the maintenance needs of long-term continuous magnesite processing conditions.

[0025] Furthermore, it also includes: convex balls 13, multiple convex balls 13 are provided, and multiple convex balls 13 are fixed to the inner wall of the cover net 12.

[0026] In the specific implementation process, it is worth noting that the convex balls 13 are made of fluororubber. Multiple convex balls 13 are evenly arrayed on the inner wall of the cover mesh 12. Compared with the traditional smooth mesh surface, it can form a multi-point flexible contact and tapping structure, which can change the contact force form of the outer wall of the filter bag 2. Through point-like intermittent contact impact, it can specifically break and peel off the fine and dense thin powder layer attached to the inner wall of the filter bag 2, further enhance the effect of sticky dust removal, and continuously maintain the surface cleanliness and air permeability of the filter bag 2.

[0027] Furthermore, it also includes: a needle-punched fiber felt layer 14, which is disposed on the inner wall of the filter bag 2, and a membrane layer 15, which is disposed on the inner wall of the needle-punched fiber felt layer 14.

[0028] In the specific implementation process, it is worth noting that the needle-punched fiber felt layer 14 is attached to the inner side of the woven substrate of the filter bag 2. It has a loose texture and uniform pores, which can flexibly support the substrate of the inner membrane layer 15. The innermost membrane layer 15 is a PTFE microporous membrane structure with a pore size smaller than the particle size of magnesite fine dust, which can realize a pure surface filtration mode. Combined with the outer mechanical beater structure, it can stabilize the air permeability of the filter bag for a long time, ensuring the continuous low-resistance and high-efficiency operation of the dust removal equipment.

[0029] Working principle: Turbulent swinging dust suppression: As the gas mixed with fine magnesite dust is discharged from the outlet pipe 6 and injected into the filter bag 2 through the flexible cylinder 4, the filter bag 2 experiences irregular swaying during the filtration of fine magnesite dust due to factors such as uneven airflow velocity distribution, the release of constraints from the flexible connection formed by the flexible cylinder 4, and the overall micro-elasticity of the filter bag 2. During this swaying process, the filter bag 2 comes into contact with the outer cover 12, which exerts a localized reverse support force on the filter bag 2. The timing and magnitude of the contact force between the filter bag 2 and the cover 12 vary randomly at different locations. This reverse force further disturbs the shape of the filter bag, resulting in repeated beating of the outer wall of the filter bag 2. This creates a continuous mechanical beating effect, which effectively reduces the probability of fine magnesite dust accumulating on the inner wall of the filter bag 2 to form a dense powder layer, inhibits dust caking and adhesion, maintains the effective air permeability area of ​​the filter bag 2, reduces equipment operating wind resistance, reduces the frequency of downtime for dust cleaning, and ensures continuous and stable operation of the dust removal equipment.

[0030] Substrate toughening and protection: The aramid fiber yarn 802 on the outer side of the spinning thread 8 has excellent wear resistance, and the antistatic polyester fiber yarn 803 can prevent electrostatic adsorption caused by contact friction between the filter bag 2 and the cover mesh 12. The aramid fiber yarn 802 and the antistatic polyester fiber yarn 803 are alternately spirally wound on the outer side of the elastic spandex fiber yarn 801, giving the filter bag 2 a slight elastic deformation capability. At the same time, in conjunction with the multiple soft convex balls 13 set on the inner wall of the cover mesh 12, the friction and wear of the outer wall of the filter bag can be effectively reduced, improving the service life and long-term operational stability of the filter bag 2. When the equipment needs maintenance after long-term operation, the operator can turn the bolt 11 counterclockwise to disassemble the cover mesh 12 as a whole, then loosen the third pipe clamp 7, and remove the soft cylinder 4 from the bottom end of the air outlet pipe 6. This facilitates the recovery of the magnesite fine dust accumulated inside the filter bag 2, and at the same time, the filter bag 2 can be cleaned to ensure normal operation of the equipment after reassembly.

[0031] Surface-coated dust filtration: When gas mixed with fine magnesite dust is discharged from the outlet pipe 6 and injected into the filter bag 2 through the flexible cylinder 4, the airflow first contacts the membrane layer 15 on the inner side of the filter bag 2. The fine magnesite dust is intercepted by the PTFE membrane layer 15, preventing it from penetrating into the filter media matrix and causing it to accumulate only on the surface of the membrane layer 15, thus reducing the probability of filter bag 2 caking and blockage at the source. The needle-punched fiber felt layer 14, located between the membrane layer 15 and the filter bag 2 matrix, provides uniform and flexible support to the membrane layer 15, ensuring a long-term stable surface filtration effect for the filter bag 2.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust removal and recovery structure for magnesite processing, characterized in that, include: Vertical tube (1); Filter bag (2), the filter bag (2) is fitted on the bottom of the outer wall of the vertical cylinder (1), the filter bag (2) includes multiple strands of spinning yarn (8), the multiple strands of spinning yarn (8) are a plain weave structure of warp and weft; The first pipe clamp (3) is used to fix the filter bag (2) to the vertical cylinder (1). A flexible tube (4) is fitted onto the top of the outer wall of the vertical tube (1); The second pipe clamp (5) is used to fix the flexible cylinder (4) to the vertical cylinder (1). An air outlet pipe (6) is inserted into the top of the inner wall of the flexible cylinder (4); The third pipe clamp (7) is used to fix the flexible cylinder (4) to the air outlet pipe (6); A mesh cover (12) is disposed on the outside of the filter bag (2).

2. The dust removal and recovery structure for magnesite processing according to claim 1, characterized in that, The spun yarn (8) includes: Spandex fiber yarn (801); Aramid fiber yarn (802), wherein the aramid fiber yarn (802) is spirally wound around the outside of the spandex fiber yarn (801); An antistatic polyester fiber thread (803) is spirally wound around the outside of the spandex fiber thread (801), and the antistatic polyester fiber thread (803) abuts against the aramid fiber thread (802).

3. The dust removal and recovery structure for magnesite processing according to claim 1, characterized in that, Also includes: Cover cylinder (9), the cover cylinder (9) is fixed to the top of the cover net (12); A circular ring (10) is fixed to the bottom end of the cover (9); Bolt (11), which passes through the ring (10), is used to fix the cover net (12).

4. The dust removal and recovery structure for magnesite processing according to claim 3, characterized in that, Also includes: A plurality of convex balls (13) are provided, and the plurality of convex balls (13) are fixed to the inner wall of the cover mesh (12).

5. The dust removal and recovery structure for magnesite processing according to claim 1, characterized in that, Also includes: A needle-punched fiber felt layer (14) is disposed on the inner wall of the filter bag (2); A coating layer (15) is disposed on the inner wall of the needle-punched fiber felt layer (14).

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