A high-efficiency carbon black flue gas dust collector bag filter

Abstract

This utility model discloses a high-efficiency carbon black flue gas dust collector bag filter, including: a conical filter box, an air inlet pipe, an exhaust pipe, a discharge pipe, a filter structure, and a dust removal structure. The air inlet pipe is inserted into the side wall of the conical filter box, the exhaust pipe is inserted into the top of the conical filter box, and the discharge pipe is inserted into the bottom of the conical filter box. This utility model relates to the field of carbon black production technology. It adopts an electromagnetically coupled driven dust removal system, and achieves a precise balance between dust removal force and energy consumption through PWM fine control, saving more than 40% energy compared to traditional mechanical vibration. The filter bag adopts an outward convex deformation design, which, combined with pulse backflushing, forms a "breathing effect," increasing the effective filtration area by 20%-25% and improving the thoroughness of dust removal by 35%. The unique wave-shaped filter arc plate structure generates a turbulence effect, which reduces airflow resistance (≤0.3) while increasing the probability of dust particle collision by more than 50%.

Description

Technical Field

[0001] This utility model relates to the field of carbon black production technology, specifically to a high-efficiency carbon black flue gas dust removal bag filter. Background Technology

[0002] In the field of industrial flue gas purification, traditional bag filter technology has long faced four major technical bottlenecks: the cleaning system mostly adopts a single mechanical vibration or fixed pulse backflushing method, which has cleaning dead corners and high energy consumption; dust caking on the surface of the filter bag easily leads to a continuous increase in system resistance; the filter bag structure generally adopts a straight cylindrical design, which limits the effective filtration area; and the dust removal efficiency is affected by the accumulation of folds during backflushing cleaning; the flow velocity distribution is uneven when dust-laden gas enters the filter box, causing excessive scouring and wear of local filter bags, while the backflow of high-pressure gas during the cleaning stage leads to energy waste; and the existing technology is not efficient enough in capturing submicron particles such as PM2.5, and it is difficult to balance the porosity of the filter bag with the filtration accuracy. These technical defects directly lead to problems such as high operating energy consumption, frequent filter bag replacement, and large fluctuations in emission concentration in traditional dust removal equipment. Especially in high dust concentration conditions such as cement kiln head and metallurgical smelting (inlet concentration often reaches above 100g / m³), the contradiction between equipment stability and purification efficiency is more prominent. There may be technical solutions to the above problems in the existing technology, but this case aims to provide an alternative or replacement technical solution. Utility Model Content

[0003] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency carbon black flue gas dust collector bag filter, comprising: a conical filter box, an inlet pipe, an exhaust pipe, a discharge pipe, a filtration structure, and a dust removal structure. The inlet pipe is inserted into the side wall of the conical filter box, the exhaust pipe is inserted into the top of the conical filter box, and the discharge pipe is inserted into the bottom of the conical filter box. The filtration structure and the dust removal structure are installed inside the conical filter box. The dust removal structure includes: a pair of U-shaped limiting blocks, two pairs of lifting limiting shafts, a pair of lifting well-shaped supports, two pairs of lifting sleeve shaft tubes, two pairs of lifting electromagnet strips, two pairs of lifting magnet strips, multiple annular tubes, multiple annular scrapers, a resistance regulator, and a current regulator.

[0004] A pair of the spiral-shaped limiting blocks are installed on the inner side of the conical filter box. Two pairs of lifting limiting shafts are evenly inserted into the pair of spiral-shaped limiting blocks and the conical filter box. The two pairs of lifting sleeve shafts are respectively inserted into the pair of lifting well-shaped brackets on both sides and are movably fitted onto the two pairs of lifting limiting shafts. Two pairs of lifting electromagnet strips are installed on the spiral-shaped limiting blocks. Two pairs of lifting magnet strips are installed on the lifting well-shaped brackets. Multiple annular tubes are evenly installed on the pair of lifting well-shaped brackets. Multiple annular scrapers are respectively installed on the inner side of multiple annular tubes. The resistance regulator and the current regulator are connected to the two pairs of lifting electromagnet strips.

[0005] It should be noted that, as described above, the two pairs of lifting electromagnet bars and the lifting magnet bars constitute an electromagnetic coupling assembly. The magnetic strength of the electromagnets is precisely controlled by a resistor regulator and a current regulator. When current is applied to the electromagnet bars, an attractive or repulsive force is generated between the magnet bars and the electromagnet bars, driving the lifting well-shaped support to reciprocate linearly along the lifting limit axis. The resistor regulator adjusts the current by changing the circuit resistance value, thereby controlling the magnetic strength and the speed of the support movement; the current regulator uses pulse width modulation (PWM) technology to achieve fine adjustment of the magnetic output, ensuring moderate dust removal force and energy saving; multiple circular tubes are fixed on the lifting well-shaped support, and the circular scrapers installed on their inner sides are made of flexible wear-resistant materials (such as polyurethane or nylon bristles), which adhere to the surface of the filter arc plate and the packaged filter bag during the support movement. The scrapers sweep the surface of the filter bag at a certain frequency, removing the attached dust while avoiding damage to the filter bag fiber structure; the vibrating magnets set on both sides of the lifting well-shaped support and the vibrating electromagnets on the inner wall of the conical filter box form a vibration generating unit. By alternating the polarity of the electromagnet, high-frequency vibrations (adjustable range 50-200Hz) are generated, causing the filter bags to vibrate slightly, aiding in the removal of stubborn dust. The funnel-shaped guide vanes on the inner wall of the conical filter box employ a gradually expanding structure (expansion angle 15°-20%), allowing for velocity gradient adjustment of the dust-laden gas before it enters the filtration zone. The airflow velocity at the inlet gradually decreases from 15-20 m / s to 5-8 m / s, reducing erosion and wear on the filter bag surface and lowering pressure loss (≤800 Pa). The unidirectional guide vanes in the inlet and outlet pipes use a louvered structure (blade angle adjustable 30°-60°) to prevent high-pressure gas from flowing back into the dust-laden air path during backflushing cleaning. Fluid simulation verification shows that this design increases the utilization rate of the cleaning airflow to over 90%, reducing energy waste.

[0006] Preferably, the filter structure includes: a filter plate, multiple circular filter discs, multiple sets of filter bags, and a well-shaped support bracket;

[0007] The filter plate and the well-shaped support bracket are installed on the inner side of the conical filter box. The two sides of the plurality of filter arc plates are respectively connected to the filter plate and the well-shaped support bracket. The plurality of filter bags are respectively fitted onto the plurality of filter arc plates.

[0008] It should be noted that, as described above, the filter bag in the kit adopts an outward convex structure with the diameter gradually increasing from both ends to the middle, and the ratio of the maximum diameter to the minimum diameter is 1.5-2.0. This design causes the filter bag to expand radially during dust collection due to the internal and external pressure difference (usually 800-1200Pa), increasing the surface area by 15%-25%. During backflushing cleaning, the pulsed airflow (pressure 0.4-0.6MPa) causes the filter bag to contract rapidly, forming a "breathing effect" and accelerating dust shedding. Multiple filter arc plates are supported by a well-shaped frame and adopt a wave-shaped curved surface structure, with the radius of curvature matching the deformation radius of the filter bag. This design creates turbulence as dust-laden gas flows through the arc-shaped plates, increasing the likelihood of dust particles colliding with the filter bag while reducing airflow resistance (resistance coefficient ≤0.3). In the initial stage of filtration, dust forms an initial layer (approximately 0.5-1.0 mm thick) on the filter bag surface, with a lower porosity than the filter bag body (initial layer porosity 30%-40%, filter bag body porosity 50%-60%). As filtration progresses, the initial layer gradually thickens, increasing the interception efficiency for submicron particles (PM2.5) to over 99.5%.

[0009] Preferably, each of the pair of lifting shaft-shaped supports is provided with two pairs of vibrating magnets.

[0010] Preferably, two pairs of vibrating electromagnets are respectively provided on the inner side of the conical filter box.

[0011] Preferably, the inner side of the conical filter box is provided with multiple horn-shaped guide vanes.

[0012] Preferably, one-way deflectors are provided on the inner side of the air intake pipe and the exhaust pipe respectively. Beneficial effects

[0013] This utility model provides a high-efficiency carbon black flue gas dust collector bag filter. It offers the following advantages compared to existing technologies: It employs an electromagnetically coupled cleaning system, achieving a precise balance between cleaning intensity and energy consumption through PWM fine-tuning control, resulting in over 40% energy savings compared to traditional mechanical vibration; the filter bag features an outward-convex deformation design, combined with pulse backflushing to create a "breathing effect," increasing the effective filtration area by 20%-25% and improving cleaning thoroughness by 35%; the unique wave-shaped filter arc plate structure generates a turbulence effect, reducing airflow resistance (≤0.3) while increasing the probability of dust particle collision by over 50%; the primary layer effect enhancement technology achieves a PM2.5 interception efficiency of 99.5%, and the gradual expansion guide plate enables gradient control of airflow velocity, keeping the equipment pressure difference consistently below 800Pa; the bidirectional anti-backflow design increases the cleaning airflow utilization rate to over 90%, and the vibration-assisted cleaning system effectively removes stubborn dust deposits, extending the filter bag's service life to over 3 years. Attached Figure Description

[0014] Figure 1 This is a front sectional view of the high-efficiency carbon black flue gas dust collector bag filter described in this utility model.

[0015] Figure 2 This is a top sectional view of the high-efficiency carbon black flue gas dust collector bag filter described in this utility model.

[0016] Figure 3 for Figure 1 A magnified view of the letter "A" in the image.

[0017] In the diagram: 1. Conical filter box; 2. Inlet pipe; 3. Exhaust pipe; 4. Discharge pipe; 5. U-shaped limit block; 6. Lifting limit shaft; 7. Lifting well-shaped bracket; 8. Lifting sleeve shaft tube; 9. Lifting electromagnet strip; 10. Lifting magnet strip; 11. Circular tube; 12. Circular scraper; 13. Filter plate; 14. Filter arc plate; 15. Filter bag sleeve; 16. Well-shaped support bracket. Detailed Implementation

[0018] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further. Example

[0020] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1-3 As shown, the air inlet pipe 2 is inserted into the side wall of the conical filter box 1, the exhaust pipe 3 is inserted into the top of the conical filter box 1, and the discharge pipe 4 is inserted into the bottom of the conical filter box 1. The filtration structure and dust removal structure are installed inside the conical filter box 1. The dust removal structure includes: a pair of U-shaped limiting blocks 5, two pairs of lifting limiting shafts 6, a pair of lifting well-shaped brackets 7, two pairs of lifting sleeve shaft tubes 8, two pairs of lifting electromagnet bars 9, two pairs of lifting magnet bars 10, and multiple annular tubes 11. The system includes multiple circular scraper brushes 12, a resistance regulator, and a current regulator; a pair of the spiral-shaped limiting blocks 5 are installed inside the conical filter box 1; two pairs of lifting limiting shafts 6 are evenly inserted into the pair of spiral-shaped limiting blocks 5 and the conical filter box 1; two pairs of lifting sleeve shaft tubes 8 are respectively inserted into a pair of lifting well-shaped brackets 7 on both sides, and are respectively movably fitted onto the two pairs of lifting limiting shafts 6; two pairs of lifting electromagnet strips 9 are installed on the spiral-shaped limiting blocks 5; and two pairs of lifting magnet strips 10 are installed... The filter structure comprises: a filter plate 13, multiple circular tubes 14, multiple sleeved filter bags 15, and a well-shaped support bracket 16; the filter plate 13 and the well-shaped support bracket 16 are mounted on the lifting well-shaped bracket 7, and multiple circular tubes 11 are evenly installed on a pair of lifting well-shaped brackets 7. The filter structure includes: a filter plate 13, multiple circular filter discs 14, multiple sleeved filter bags 15, and a well-shaped support bracket 16. The filter plate 13 and the well-shaped support bracket 16 are mounted on the conical filter. Inside the filter box 1, multiple filter arc plates 14 are connected to the filter plate 13 and the well-shaped support bracket 16 on both sides respectively, and multiple filter bags 15 are respectively fitted onto the multiple filter arc plates 14; two pairs of vibrating magnets are respectively provided on a pair of lifting well-shaped brackets 7; two pairs of vibrating electromagnets are respectively provided on the inside of the conical filter box 1; multiple horn-shaped guide plates are provided on the inside of the conical filter box 1; one-way guide plates are respectively provided on the inside of the air inlet pipe 2 and the exhaust pipe 3.

[0021] According to the appendix Figure 1-3It is concluded that the two pairs of lifting electromagnet bars 9 and lifting magnet bars 10 constitute an electromagnetic coupling assembly, and the magnetic strength of the electromagnets is precisely controlled by a resistor regulator and a current regulator. When current is applied to the electromagnet bars, an attractive or repulsive force is generated between the magnet bars and the electromagnet bars, driving the lifting well-shaped support 7 to reciprocate linearly along the lifting limit axis 6. The resistor regulator adjusts the current by changing the circuit resistance value, thereby controlling the magnetic strength and the movement speed of the support; the current regulator achieves fine adjustment of the magnetic output through pulse width modulation (PWM) technology, ensuring moderate dust removal force and energy saving; multiple annular tubes 11 are fixed on the lifting well-shaped support 7, and the annular scrapers 12 installed on their inner sides are made of flexible wear-resistant materials (such as polyurethane or nylon bristles), which adhere to the surface of the filter arc plate 14 and the sleeve filter bag 15 during the movement of the support. The scrapers sweep the surface of the filter bag at a certain frequency, peeling off the attached dust, while avoiding damage to the fiber structure of the filter bag; the vibrating magnets set on both sides of the lifting well-shaped support 7 and the vibrating electromagnets on the inner wall of the conical filter box 1 form a vibration generating unit. By alternating the polarity of the electromagnet, high-frequency vibrations (adjustable range 50-200Hz) are generated, causing the filter bag to vibrate slightly, assisting in the removal of stubborn dust. The funnel-shaped guide vanes on the inner wall of the conical filter box 1 adopt a gradually expanding structure (expansion angle 15°-20%), allowing the velocity gradient of the dust-laden gas to be adjusted before entering the filtration zone. The airflow velocity at the inlet gradually decreases from 15-20m / s to 5-8m / s, reducing erosion and wear on the filter bag surface and lowering pressure loss (≤800Pa). The unidirectional guide vanes in the inlet pipe 2 and the exhaust pipe 3 adopt a louvered structure (blade angle adjustable 30°-60°) to prevent high-pressure gas from flowing back into the dust-laden air path during backflushing cleaning. Fluid simulation verification shows that this design increases the utilization rate of the cleaning airflow to over 90%, reducing energy waste. The filter bag 15 adopts an outwardly convex structure with the diameter gradually increasing from both ends to the middle, with a maximum diameter to minimum diameter ratio of 1.5-2.0. This design causes the filter bag to expand radially during dust collection due to the internal and external pressure difference (typically 800-1200Pa), increasing the surface area by 15%-25%. During backflushing, the pulsed airflow (pressure 0.4-0.6MPa) causes the filter bag to contract rapidly, creating a "breathing effect" and accelerating dust shedding. Multiple filter arc plates 14 are supported by a well-shaped frame 16, employing a wave-shaped curved surface structure with a radius of curvature matching the deformation radius of the filter bag. This design generates turbulence as the dust-laden gas flows through the arc plates, increasing the probability of collision between dust particles and the filter bag while reducing airflow resistance (resistance coefficient ≤0.3). In the initial stage of filtration, dust forms an initial layer (approximately 0.5-1.0mm thick) on the filter bag surface, with a porosity lower than that of the filter bag body (initial layer porosity 30%-40%, filter bag body porosity 50%-60%). As filtration progresses, the initial layer gradually thickens, increasing the interception efficiency of submicron particles (PM2.5) to over 99.5%.

[0022] 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 high-efficiency carbon black flue gas dust collector bag filter, comprising: The filter includes a conical filter box, an air inlet pipe, an exhaust pipe, a discharge pipe, a filter structure, and a dust removal structure. The air inlet pipe is inserted into the side wall of the conical filter box, the exhaust pipe is inserted into the top of the conical filter box, and the discharge pipe is inserted into the bottom of the conical filter box. The filter structure and the dust removal structure are installed inside the conical filter box. The dust removal structure includes: a pair of U-shaped limiting blocks, two pairs of lifting limiting shafts, a pair of lifting well-shaped supports, two pairs of lifting sleeve shaft tubes, two pairs of lifting electromagnet strips, two pairs of lifting magnet strips, multiple annular tubes, multiple annular scrapers, a resistance regulator, and a current regulator. A pair of the spiral-shaped limiting blocks are installed on the inner side of the conical filter box. Two pairs of lifting limiting shafts are evenly inserted into the pair of spiral-shaped limiting blocks and the conical filter box. The two pairs of lifting sleeve shafts are respectively inserted into the pair of lifting well-shaped brackets on both sides and are movably fitted onto the two pairs of lifting limiting shafts. Two pairs of lifting electromagnet strips are installed on the spiral-shaped limiting blocks. Two pairs of lifting magnet strips are installed on the lifting well-shaped brackets. Multiple annular tubes are evenly installed on the pair of lifting well-shaped brackets. Multiple annular scrapers are respectively installed on the inner side of the multiple annular tubes. The resistance regulator and the current regulator are connected to the two pairs of lifting electromagnet strips.

2. The high-efficiency carbon black flue gas dust collector bag filter according to claim 1, characterized in that, The filtration structure includes: a filter plate, multiple circular filter discs, multiple sets of filter bags, and a well-shaped support bracket. The filter plate and the well-shaped support bracket are installed on the inner side of the conical filter box. The two sides of the plurality of filter arc plates are respectively connected to the filter plate and the well-shaped support bracket. The plurality of filter bags are respectively fitted onto the plurality of filter arc plates.

3. The high-efficiency carbon black flue gas dust collector bag filter according to claim 2, characterized in that, Each of the aforementioned lifting shaft-shaped supports is equipped with two pairs of vibrating magnets.

4. The high-efficiency carbon black flue gas dust collector bag filter according to claim 3, characterized in that, Two pairs of vibrating electromagnets are respectively installed on the inner side of the conical filter box.

5. A high-efficiency carbon black flue gas dust collector bag filter according to claim 4, characterized in that, The inner side of the conical filter box is provided with multiple horn-shaped flow guide plates.

6. A high-efficiency carbon black flue gas dust collector bag filter according to claim 5, characterized in that, One-way drainage plates are respectively provided on the inner side of the air intake pipe and the exhaust pipe.

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