Electrostatic bag composite dust collector

Abstract

The utility model relates to dust removal equipment technical field, specifically disclose a kind of electric bag type composite dust collector, including equipment shell, its inner wall bottom is equipped with electrostatic adsorption component, containing polar plate A and polar plate B, polar plate A top has equidistant electrode needle group, polar plate B bottom has equidistant dust electrode plate group, both staggered arrangement, shell outside has high voltage power supply box. The top of the inner wall of the shell is provided with a fixed platform, and a bag-type dust collector is installed through the fixed platform. The bottom of the shell is a beveled bottom shell, connected to a dust-containing input pipe, and the output end is vertically aligned with the electrostatic adsorption component. The device first pre-adsorbs and filters dust-containing airflow through the electrostatic adsorption component, reducing the impact of large particles of dust on the subsequent bag-type dust collector. The bag-type dust collector and the electrostatic adsorption component are staggered vertically, and the dust will not reattach to the electrostatic adsorption component during dust removal. The overall structure is compact and the dust removal effect is good.

Description

Technical Field

[0001] This utility model relates to the field of dust removal equipment technology, specifically to an electrostatic bag filter composite dust collector. Background Technology

[0002] In industrial production, dust pollution is becoming increasingly serious, making the demand for high-efficiency dust removal equipment more urgent. Among traditional dust removal methods, electrostatic precipitators, while capable of capturing fine particles, have limited effectiveness in adsorbing large dust particles, and their electrodes tend to accumulate dust after prolonged use, leading to a decrease in dust removal efficiency. Baghouse dust collectors, on the other hand, have a good interception effect on large dust particles, but when there are too many large particles in the dust-laden airflow, it accelerates filter bag wear, shortens filter bag lifespan, and increases operating costs. Furthermore, some existing devices combining electrostatic and baghouse dust collection have structural layout defects. The unreasonable placement of the electrostatic adsorption components and the baghouse dust collector means that when cleaning dust from the baghouse dust collector surface, the stirred-up dust easily re-adheres onto the electrostatic adsorption components, affecting their normal operation and thus reducing the overall dust removal efficiency. Therefore, we propose an electrostatically charged baghouse composite dust collector. Utility Model Content

[0003] In view of the above-mentioned technical problems in related technologies, this utility model provides an electrostatic bag filter composite dust collector that can solve the above problems.

[0004] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows:

[0005] An electrostatic baghouse composite dust collector includes an outer casing. An electrostatic adsorption assembly is installed on the bottom of the inner wall of the outer casing. The electrostatic adsorption assembly includes an electrode plate A and an electrode plate B. Electrode needles are fixedly installed at equal intervals on the top of electrode plate A, and dust-collecting electrode plates are fixedly installed at equal intervals on the bottom of electrode plate B. The electrode needles and dust-collecting electrode plates are staggered. A high-voltage power supply box is fixedly installed on the outside of the outer casing. A fixed platform is installed on the top of the inner wall of the outer casing, through which the baghouse dust collector is installed. A sloping bottom shell is installed at the bottom of the outer casing, and a dust-laden input pipe is connected to the bottom of the sloping bottom shell. The output end of the dust-laden input pipe is vertically aligned with the electrostatic adsorption assembly.

[0006] Furthermore, several flow guide ports A are equidistantly provided on the surface of electrode plate A, and the flow guide ports A are vertically aligned with the dust-attached electrode plate assembly. Several flow guide ports B are equidistantly provided on the surface of electrode plate B, and the flow guide ports B are vertically aligned with the electrode needle assembly.

[0007] Furthermore, an air duct plate and a ash-pouring inclined plate are fixedly installed in the middle of the inner wall of the equipment shell. The air duct plate has several filter holes, and the top of the ash-pouring inclined plate overlaps the top of the air duct plate.

[0008] Furthermore, the duct plate is located directly above the electrostatic adsorption assembly, and the ash-pouring inclined plate is located directly below the bag filter.

[0009] Furthermore, a ash discharge cylinder is connected and installed at the lowest point of the inclined bottom shell, and an ash discharge inclined surface is integrally formed on one side of the inclined bottom shell.

[0010] Furthermore, reinforcing ribs are fixedly installed at the bottom of the air duct plate and the bottom of the ash pouring slope plate, and the reinforcing ribs are fixed to the inner wall of the equipment shell.

[0011] The beneficial effects of this utility model are as follows: The device of this application pre-filters the dust-laden airflow by using an electrostatic adsorption component, and then performs secondary filtration through a bag filter, which reduces the impact of large dust particles on the purification effect of the bag filter. The bag filter and the electrostatic adsorption component are staggered in position, so when removing dust from the surface of the bag filter, the dust will not re-adhere to the electrostatic adsorption component and cause an impact. The overall structure is compact and the dust removal effect is good. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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.

[0013] The present invention will now be described in further detail with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the structure of an electrostatic precipitator bag filter.

[0015] Figure 2 This is a schematic diagram of the internal structure of an electrostatic precipitator bag filter.

[0016] Figure 3 This is a schematic diagram of the electrostatic adsorption component;

[0017] Figure 4 This is a structural diagram of the air duct plate and the ash pouring inclined plate.

[0018] In the picture:

[0019] 1. Equipment casing; 2. High-voltage power supply box; 3. Dust-laden input pipe; 4. Sloping bottom shell; 401. Ash discharge sloping surface; 5. Ash discharge cylinder; 6. Maintenance panel A; 7. Maintenance panel B; 8. Exhaust duct; 9. Electrode plate A; 901. Electrode needle assembly; 902. Guide port A; 10. Electrode plate B; 1001. Dust-laden electrode plate assembly; 1002. Guide port B; 11. Air duct plate; 1101. Filter duct; 12. Ash discharge sloping plate; 13. Bag filter; 14. Fixed platform. Detailed Implementation

[0020] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0021] like Figure 1-4 As shown, this utility model discloses an electrostatic bag filter composite dust collector, including a housing 1. An electrostatic adsorption assembly is provided at the bottom of the inner wall of the housing 1. The electrostatic adsorption assembly includes an electrode plate A9 and an electrode plate B10. Electrode needles 901 are fixedly installed at equal intervals on the top of the electrode plate A9, and dust-collecting electrode plates 1001 are fixedly installed at equal intervals on the bottom of the electrode plate B10. The electrode needles 901 and the dust-collecting electrode plates 1001 are staggered. A high-voltage power supply box 2 is fixedly installed on the outside of the housing 1. A fixed platform 14 is provided at the top of the inner wall of the housing 1. A bag filter 13 is installed through the fixed platform 14. A sloping bottom shell 4 is provided at the bottom of the housing 1. A dust-laden input pipe 3 is connected to the bottom of the sloping bottom shell 4. The output end of the dust-laden input pipe 3 is vertically aligned with the electrostatic adsorption assembly.

[0022] Example 1: The electrode plate A9 is made of aluminum alloy or stainless steel, with a conductive and anti-corrosion coating (such as graphene coating) sprayed on the surface to ensure corrosion resistance and conductivity. The electrode needle assembly 901 consists of 10-20 tungsten steel needles with a diameter of 0.5 mm, arranged in a comb-like pattern at equal intervals on the top of the electrode plate A9, with a needle tip spacing of 10-15 mm, used to generate corona discharge. The guide port A902 is a circular through hole with a diameter of 8-12 mm, the number of which is consistent with the number of plates in the dust-collecting electrode plate assembly 1001 (e.g., 10), vertically aligned with the central area of ​​the dust-collecting electrode plate assembly 1001.

[0023] Electrode B10 is identical to electrode A9, ensuring uniform electric field. The dust-collecting electrode plate assembly 1001 consists of 10-20 parallel metal plates, each 1mm thick, with a plate spacing of 15-20mm. The plate surfaces are roughened (e.g., sandblasted) to enhance dust adsorption capacity. The guide port B1002 is a circular through-hole with a diameter of 8-12mm, the number of which matches the number of needles in electrode needle assembly 901 (e.g., 10), vertically aligned with the area below the needle tips of electrode needle assembly 901. The high-voltage power supply box 2 provides DC high-voltage electricity (50-70kV), with a current of 5-10mA, connected to electrode needle assembly 901 and electrode plate B10 (e.g., electrode plate B10 is grounded to create a potential difference). The equipment casing 1 is made of carbon steel with an internal high-temperature resistant fiberglass lining to prevent electric field leakage and external interference. Sealing design: Silicone sealing rings are installed at the inlet and outlet flanges to ensure no flue gas leakage.

[0024] The high-voltage power supply box 2 is activated, applying a DC high voltage (e.g., 60kV) to the electrode needle assembly 901. The electrode plate B10 is grounded, creating a potential difference (60kV). The gas near the needle tip of the electrode needle assembly 901 is ionized, generating a large number of positive ions and free electrons, forming a corona region (radius approximately 5-10mm). The electric field strength gradually decreases from the electrode needle assembly 901 towards the dust-laden electrode plate assembly 1001, forming a non-uniform electric field, which facilitates dust charging and migration. Dust-laden flue gas enters through the inlet of the equipment casing 1. As it flows below the electrode needle assembly 901, dust particles (0.1-100μm in diameter) in the flue gas collide with the positive ions and electrons generated in the corona region. Dust particles directly adsorb ions and become charged under the influence of the electric field (suitable for dust particles >1μm). Dust particles also become charged through Brownian motion and collisions with ions (suitable for fine dust particles <0.1μm). The surface charge density of the dust particles reaches 10⁻⁻⁶. 5 -10⁻ 4 C / m², forming a charged dust cloud. Under the action of the electric field force, the charged dust migrates towards the dust-collecting electrode plate group 1001 of electrode plate B10. After the charged dust reaches the dust-collecting electrode plate group 1001, due to the weakening of the electric field force and the action of van der Waals forces, it is deposited on the surface of the plate, forming a dust layer. Dust discharge: The detached dust falls into the ash hopper at the bottom of the equipment shell 1 through the guide ports A902 and B1002, and is discharged to the ash storage bin by the screw conveyor;

[0025] The bag filter 13 uses a filter bag made of polyphenylene sulfide (PPS) base fabric + PTFE film, and the frame that fixes the filter bag is made of carbon steel frame with galvanized surface treatment.

[0026] In the preferred technical solution, several guide ports A902 are equidistantly opened on the surface of electrode plate A9, and the guide ports A902 are vertically aligned with the dust-collecting electrode plate assembly 1001. Similarly, several guide ports B1002 are equidistantly opened on the surface of electrode plate B10, and the guide ports B1002 are vertically aligned with the electrode needle assembly 901. The vertical alignment of the guide ports A902 with the dust-collecting electrode plate assembly 1001 ensures that the flue gas passes vertically through the central area of ​​the dust-collecting electrode plate assembly 1001, reducing airflow short-circuiting. The vertical alignment of the guide ports B1002 with the electrode needle assembly 901 allows unadsorbed dust to be recharged in the corona zone, improving collection efficiency. The electrode needle assembly 901 and the dust-collecting electrode plate assembly 1001 are staggered, resulting in an "S"-shaped distribution of the electric field lines, extending the dust migration path and further improving collection efficiency. The vertical alignment design of the guide ports A902 and B1002 forms an "electric field-airflow" coupling channel, avoiding local short circuits caused by flue gas bypass.

[0027] In the preferred technical solution, an air duct plate 11 and a dust-pouring inclined plate 12 are fixedly installed in the middle of the inner wall of the equipment shell 1. The air duct plate 11 has several filter holes ducts 1101. The top of the dust-pouring inclined plate 12 overlaps with the top of the air duct plate 11. The filter holes ducts 1101 of the air duct plate 11 can evenly distribute the dust-laden airflow, improve the filtration efficiency and reduce local wear. The dust-pouring inclined plate 12 and the air duct plate 11 overlap to form a flow guiding structure, which can guide the dust to slide naturally into the dust hopper, reduce the dead corner of dust accumulation, prevent airflow short circuit, enhance the dust removal effect and extend the service life of the equipment.

[0028] In the preferred technical solution, the duct plate 11 is located directly above the electrostatic adsorption component, and the ash-pouring inclined plate 12 is located directly below the bag filter 13. The duct plate 11, located directly above the electrostatic adsorption component, can perform secondary flow equalization on the airflow after electrostatic adsorption, thereby improving the subsequent filtration effect. The ash-pouring inclined plate 12, located directly below the bag filter 13, can guide the dust discharged from the filter bag to fall smoothly into the ash hopper, avoiding secondary dust generation and ensuring the efficient and stable operation of the dust removal system.

[0029] In the preferred technical solution, the lowest point of the inclined bottom shell 4 is connected to the ash discharge cylinder 5, and an integrally formed ash discharge slope 401 is formed on one side of the inclined bottom shell 4. The lowest point of the inclined bottom shell 4 is connected to the ash discharge cylinder 5, which can use gravity to allow dust to naturally gather and be discharged quickly, reducing residue. The integrally formed ash discharge slope 401 can avoid dust accumulation at the joints, and at the same time guide the dust to flow towards the ash discharge cylinder 5 to prevent blockage, improve dust removal efficiency and reduce equipment maintenance costs.

[0030] In the preferred technical solution, reinforcing ribs are fixedly installed at the bottom of the air duct plate 11 and the bottom of the ash pouring inclined plate 12. The reinforcing ribs are fixed to the inner wall of the equipment shell 1. Adding reinforcing ribs to the bottom of the air duct plate 11 and the ash pouring inclined plate 12 and fixing them to the inner wall of the equipment shell 1 can significantly improve the structural strength and prevent deformation caused by airflow impact or dust accumulation. At the same time, it enhances the overall stability, reduces vibration and noise, extends the service life of the equipment, and ensures the long-term efficient operation of the dust removal system.

[0031] In practical use, the electrostatic adsorption component is turned on, and the dust-laden airflow is guided to the electrostatic adsorption component by the dust-laden input pipe 3. The airflow passes through the guide port A902, the dust-laden electrode plate group 1001, and the guide port B1002 in sequence. Most of the large dust particles are adsorbed on the surface of the dust-laden electrode plate group 1001. The airflow then passes through the air duct plate 11 and comes into contact with the filter bags of the bag filter 13. The airflow is filtered by the filter bags of the bag filter 13, and the purified airflow is discharged from the exhaust duct 8. The maintenance plate A6 is aligned with the electrostatic adsorption component, and the maintenance plate B7 is aligned with the bag filter 13. The maintenance plates are disassembled for maintenance of the electrostatic adsorption component and the bag filter 13. The dust on the surface of the dust-laden electrode plate group 1001 passes through the inclined bottom shell 4 and is finally discharged from the ash discharge pipe 5. The dust on the surface of the filter bags of the bag filter 13 is discharged from the ash discharge inclined plate 12 and finally from the ash discharge port on the side of the equipment shell 1.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A charged baghouse precipitator, characterized in that The device includes a housing (1), and an electrostatic adsorption assembly is provided at the bottom of the inner wall of the housing (1). The electrostatic adsorption assembly includes an electrode plate A (9) and an electrode plate B (10). An electrode needle assembly (901) is fixedly installed at equal intervals on the top of the electrode plate A (9), and a dust-collecting electrode plate assembly (1001) is fixedly installed at equal intervals on the bottom of the electrode plate B (10). The electrode needle assembly (901) and the dust-collecting electrode plate assembly (1001) are arranged alternately. A high-voltage power supply box (2) is fixedly installed on the outside of the housing (1). A fixed platform (14) is provided at the top of the inner wall of the housing (1), and a bag filter (13) is installed through the fixed platform (14). The bottom of the device housing (1) is provided with a sloping bottom shell (4), and a dust-containing input pipe (3) is connected to the bottom of the sloping bottom shell (4). The output end of the dust-containing input pipe (3) is vertically aligned with the electrostatic adsorption component.

2. The electrostatic precipitator for bag filters according to claim 1, characterized in that, The electrode plate A (9) has several guide ports A (902) equidistantly opened on its surface. The guide ports A (902) are vertically aligned with the dust-attached electrode plate group (1001). The electrode plate B (10) has several guide ports B (1002) equidistantly opened on its surface. The guide ports B (1002) are vertically aligned with the electrode needle group (901).

3. The electrostatic precipitator for bag filters according to claim 1, characterized in that, The equipment housing (1) has a duct plate (11) and a ash-pouring inclined plate (12) fixedly installed in the middle of the inner wall. The duct plate (11) has several filter holes (1101) and the top of the ash-pouring inclined plate (12) overlaps the top of the duct plate (11).

4. The electrostatic precipitator for bag filters according to claim 3, characterized in that, The air duct plate (11) is located directly above the electrostatic adsorption component, and the ash pouring inclined plate (12) is located directly below the bag filter (13).

5. The electrostatic precipitator for bag filters according to claim 1, characterized in that, The lowest point of the inclined bottom shell (4) is connected to the ash discharge cylinder (5), and the ash discharge inclined surface (401) is integrally formed on one side of the inclined bottom shell (4).

6. The electrostatic precipitator for bag filters according to claim 3, characterized in that, The bottom of the air duct plate (11) and the bottom of the ash pouring inclined plate (12) are both fixedly equipped with reinforcing ribs, which are fixed to the inner wall of the equipment shell (1).

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