Pulse bag-type dust collector

Abstract

The pulse bag-type dust collector comprises a shell, a pulse dust cleaning device, an air inlet pipeline and an air outlet pipeline, and the interior of the shell is divided into a dust hopper, a filtering chamber and an air purifying chamber by partition plates; the ash bucket is located at the bottom of the shell, a flow guide plate is arranged in the ash bucket, and an ash discharge valve is arranged below the flow guide plate; the filter chamber is located above the ash hopper, a cloth bag assembly is installed in the filter chamber, the cloth bag assembly comprises vertically-arranged filter bags and supporting keels of the filter bags, and the upper end of each filter bag is connected to the partition plate through a fixing flange; the air purifying chamber is positioned above the filtering chamber; the pulse ash removal device comprises an air bag, a pulse valve, a blowing pipe and a venturi tube, the air bag is fixedly installed outside the shell, the pulse valve is fixed to an air outlet of the air bag, the pulse valve is connected with the blowing pipe, and the blowing pipe is horizontally installed on the upper portion of the filter chamber; the air inlet pipeline is located on the side portion of the shell. And the air outlet pipeline is positioned at the top of the shell. The dust settling efficiency, the dust cleaning effect of the filter bag and the operation stability of equipment are remarkably improved.

Description

Technical Field

[0001] This patent relates to a pulse bag filter dust collector. Background Technology

[0002] With the acceleration of industrialization, the amount of dust-laden gas emitted from industries such as steel, chemicals, cement, and power has increased significantly. The dust particles in these gases not only affect environmental quality but also pose a threat to human health. Pulse jet baghouse dust collectors are widely used in various industrial settings due to their high efficiency and economical dust removal capabilities. However, existing pulse jet baghouse dust collectors still have the following main shortcomings in practical applications:

[0003] Uneven airflow distribution leads to low filtration efficiency

[0004] In existing technologies, the airflow directly impacts the filter bags after entering the filter chamber. Due to the lack of an effective airflow distribution device, the airflow distribution is uneven, and some filter bags bear excessive airflow loads, increasing local wear and pressure loss. Furthermore, this design also leads to some filter bags failing to meet filtration efficiency standards.

[0005] Inefficient dust removal system

[0006] Most existing pulse jet cleaning devices suffer from insufficient jet airflow intensity or poor directionality. In particular, the angle and force of the jet airflow contacting the filter bag surface are not optimized, resulting in limited cleaning effectiveness. This leads to a gradual thickening of dust accumulation on the filter bag surface, increasing resistance, shortening filter bag life, and reducing filtration efficiency. Furthermore, some devices fail to effectively induce external air to participate in the jet cleaning, resulting in low cleaning efficiency.

[0007] In summary, while existing pulse jet baghouse dust collectors have addressed the dust removal needs of industrial waste gas to some extent, they still suffer from incomplete dust treatment, limited cleaning efficiency, and decreased operating efficiency. To address these shortcomings, this patent provides an optimized pulse jet baghouse dust collector design, aiming to improve the overall operating efficiency and service life of the equipment. The background section of this patent aims to describe the current state of the existing technical field. The deficiencies of the prior art are explained in this section. This section provides necessary background information for understanding the technical contributions and innovations of this patent. The signals disclosed in this background section are merely intended to enhance the understanding of the overall background of this patent and should not be construed as implying any subjective intent.

[0008] Patent content

[0009] In view of the above, the purpose of this patent is to provide a pulse bag dust collector.

[0010] The technical solution adopted to achieve the purpose of this patent is a pulse bag dust collector, including a shell, a pulse cleaning device, an inlet duct, and an outlet duct. The shell is internally divided into a dust hopper, a filter chamber, and a clean air chamber by a partition. The dust hopper is located at the bottom of the shell, and its inner wall is coated with an anti-adhesion coating. The dust hopper has a conical structure with a cone angle of 40° to 60° to reduce dust accumulation on the hopper wall. An annular sealing gasket is provided at the connection between the dust hopper and the shell. A guide plate is installed inside the dust hopper, which is inclined and connected to the inner wall of the dust hopper. The lower part of the guide plate... The system includes an ash discharge valve, which is electrically controlled. The filter chamber is located above the ash hopper and contains a bag filter assembly. The assembly consists of vertically arranged filter bags and their supporting frame. The upper end of each filter bag is connected to a partition via a fixed flange. Multiple airflow distribution plates are also installed inside the filter chamber, fixed at an angle at the filter chamber inlet to evenly distribute the dust-laden airflow entering the filter chamber and reduce the direct impact of the airflow on the filter bags. The clean air chamber is located above the filter chamber and contains multiple layers of guide netting made of corrosion-resistant alloy material. Made of a material used to homogenize the purified airflow, the clean air chamber has an exhaust duct at the top, which is connected to the clean air chamber. The pulse cleaning device includes an air tank, a pulse valve, a blowpipe, and a venturi tube. The air tank is fixedly installed outside the housing and connected to the housing via a support frame. The bottom of the support frame is equipped with anti-vibration rubber pads to reduce the impact of vibration during operation. The air tank inlet is connected to an external compressed air supply. The pulse valve is fixed to the air tank outlet and connected to the blowpipe. The blowpipe is horizontally installed above the filter chamber, and the blowpipe is evenly distributed along the axial direction. There are multiple nozzles, each corresponding to the position of the filter bag. Each nozzle has an embedded Venturi tube with an inlet diameter larger than the outlet diameter to improve the airflow during the pulse cleaning process. The air inlet duct is located on the side of the shell, and its inlet is equipped with an adjustable baffle. The baffle can be manually adjusted to control the airflow and velocity entering the ash hopper from the pulse cleaning device. The air outlet duct is located at the top of the shell, and its outlet direction is aligned with the central axis of the top of the clean air chamber. The air outlet duct has multiple layers of velocity homogenizing mesh inside, which adopts a honeycomb structure to reduce the turbulence of the gas emission.

[0011] Furthermore, the housing consists of an outer shell plate, an inner support frame, and a heat insulation layer. The heat insulation layer is sandwiched between the outer shell plate and the support frame. The top of the housing is provided with a removable inspection cover to facilitate the maintenance and cleaning of the filter bag assembly and the interior of the clean air chamber.

[0012] Furthermore, the outlet direction of the venturi tube is arranged at an angle to the central axis of the filter bag to avoid localized wear caused by the direct impact of the jet airflow on the filter bag.

[0013] Furthermore, the air outlet duct is connected to the clean air chamber via a flexible corrugated pipe, which can buffer the vibration during equipment operation.

[0014] The beneficial effects of this patent are:

[0015] 1. Optimized airflow distribution: The combined design of the airflow distribution plate and the guide plate significantly improves the efficiency of the initial separation and filtration stages.

[0016] 2. High dust removal efficiency: The venturi-induced airflow enhances the jet cleaning effect, making the filter bag cleaner more thorough and reducing pressure loss caused by dust accumulation. The venturi-induced effect significantly improves the intensity of the jet airflow, allowing the dust adhering to the filter bag surface to be quickly removed. In addition, the nozzles on the jet pipe correspond one-to-one with the filter bag positions, ensuring comprehensive jet cleaning coverage.

[0017] 3. Overall structural optimization: Multiple designs, such as conical ash hopper, flexible corrugated pipe and heat insulation shell, ensure the adaptability and durability of the equipment under complex working conditions.

[0018] 4. Strong operational stability: The multi-layer guide net and velocity equalization net ensure uniform exhaust velocity, reduce airflow turbulence, and improve the quality of exhaust gas. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this patent or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this patent. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this patent;

[0021] In the diagram, 101-clean air chamber, 102-filter chamber, 103-ash hopper, 104-ash discharge valve, 201-air manifold, 202-purge pipe. Detailed Implementation

[0022] The following detailed description of specific embodiments of this patent, in conjunction with the accompanying drawings, is provided to better understand the technical content of this patent, but this patent should not be limited thereto.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The patent will be described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 As shown in Figure 3, this patent provides a pulse bag filter dust collector, which includes a shell, a dust hopper, a filter chamber, a clean air chamber, an inlet duct, an outlet duct, and a pulse cleaning device.

[0025] In this embodiment, the housing consists of an outer shell plate, an inner support frame, and a heat insulation layer. The heat insulation layer is sandwiched between the outer shell plate and the inner support frame to ensure stable operation of the equipment in high-temperature or cold environments. The top of the housing is equipped with a removable maintenance cover to facilitate cleaning and maintenance of the equipment's interior by the user. The interior of the housing is divided into an ash hopper, a filter chamber, and a clean air chamber.

[0026] In this embodiment, the ash hopper is located at the bottom of the shell and is designed with a conical structure with a cone angle ranging from 40° to 60°. This effectively reduces dust accumulation on the hopper wall and ensures that the dust can smoothly slide down to the ash discharge valve at the bottom. The inner wall of the ash hopper is coated with an anti-adhesion coating to further reduce the possibility of dust adhesion and enhance the dust removal efficiency. The ash hopper is equipped with an inclined guide plate inside. One end of the guide plate is fixedly connected to the inner wall of the ash hopper, while the other end is suspended near the center area of ​​the ash hopper. The guide plate is used to optimize the airflow distribution, allowing coarse dust to settle to the bottom of the ash hopper due to inertia, while reducing the impact of turbulence on the dust settling efficiency. An ash discharge valve, which is an electrically controlled valve, is located below the guide plate.

[0027] In this embodiment, the filter chamber is located above the ash hopper, and a bag assembly is installed inside it. The bag assembly includes several vertically arranged filter bags, each of which is connected to a partition via a fixed flange. The support structure of the filter bags is a metal frame made of corrosion-resistant material to enhance the support strength and service life of the filter bags. The filter bags are made of high-efficiency filter fibers with micron-sized pores on their surface to trap fine dust particles. To avoid localized wear caused by direct impact of airflow on the filter bags, multiple inclined airflow distribution plates are installed at the inlet of the filter chamber. The airflow distribution plates can evenly distribute the dust-laden gas while reducing the airflow velocity and impact force. In addition, the outlet direction of the venturi tube is arranged at an angle to the central axis of the filter bag, further reducing the impact wear caused by the jet airflow on the filter bags.

[0028] In this embodiment, the clean air chamber is located above the filter chamber. It contains multiple layers of flow guide nets made of corrosion-resistant alloy material, arranged parallel to each other at certain intervals within the clean air chamber to homogenize the purified airflow. The honeycomb mesh structure of the flow guide nets significantly reduces the turbulence of the purified airflow and improves the quality of the exhaust air. The top of the clean air chamber is connected to an exhaust duct, which contains multiple layers of velocity homogenizing nets. The combination of the homogenizing nets and the flow guide nets ensures that the discharged gas has a uniform velocity and stable direction, further optimizing the overall performance of the dust collector. To reduce the impact of vibration during operation on the connection between the clean air chamber and the exhaust duct, the exhaust duct and the clean air chamber are connected by a flexible corrugated pipe. The corrugated pipe can absorb vibration energy and alleviate mechanical stress during equipment operation.

[0029] In this embodiment, the pulse cleaning device includes an air tank, a pulse valve, a blowpipe, and a venturi tube. The air tank is fixedly installed outside the housing and connected to the housing via a support frame. The bottom of the support frame is equipped with anti-vibration rubber pads to effectively reduce vibration transmission during equipment operation. The air tank's inlet end is connected to an external compressed air supply device, and its outlet end is connected to the blowpipe via the pulse valve. The blowpipe is horizontally installed on the top of the filter chamber, with multiple nozzles evenly distributed on it. Each nozzle is directly opposite the corresponding filter bag position. A venturi tube is embedded inside the nozzle, with the inlet diameter of the venturi tube being larger than the outlet diameter. By blowing compressed air, a strong induced airflow is formed, causing the filter bag to expand instantly. The attached dust is forcefully peeled off and falls into the ash hopper.

[0030] In this embodiment, the air inlet duct is located on the side of the housing, and an adjustable baffle is installed at its inlet. Users can manually adjust the opening of the baffle to control the flow rate and velocity of the dust-laden gas entering the ash hopper from the pulse cleaning device. The design of the baffle ensures that the equipment is suitable for airflow adjustment needs under different working conditions, thereby improving dust removal efficiency and adaptability.

[0031] Dust removal and operation process instructions

[0032] During equipment operation, dust-laden gas enters the ash hopper through the inlet duct. Some coarse dust settles to the bottom of the ash hopper due to inertia. The remaining gas enters the filter chamber, is filtered by the bag filter assembly, and the dust is trapped on the outer surface of the filter bags. The purified gas enters the clean air chamber and is discharged through the outlet duct.

[0033] Once the dust accumulated on the surface of the filter bag reaches a certain thickness, the operator activates the pulse cleaning device. Compressed air passes through the blowpipe and venturi tube to create a powerful induced airflow, causing the filter bag to expand instantly. The dust adhering to the outer surface of the filter bag falls off and settles to the bottom of the dust hopper, thus automating the cleaning operation.

[0034] Detailed Explanation of Working Principle

[0035] This patent relates to a high-efficiency pulse bag filter dust collector, whose working principle is based on a combination of mechanical separation and filtration purification. Through a unique structural design and pulse cleaning technology, it achieves efficient filtration and dust removal of dust-laden gas. The following details its working principle in conjunction with its specific structure and operation.

[0036] 1. Preliminary separation of airflow and dust

[0037] Dust-laden gas enters the ash hopper section of the equipment through the inlet duct. To adapt to different operating conditions, an adjustable baffle is designed at the inlet of the inlet duct, allowing users to manually adjust the baffle opening according to actual needs, thereby adjusting the airflow and velocity of the pulse cleaning device.

[0038] Key mechanisms for initial separation:

[0039] 1. Airflow entry: After the airflow enters the ash hopper, larger dust particles are released from the airflow due to inertia and settle to the bottom of the ash hopper.

[0040] 2. Optimize airflow distribution with guide vanes: The guide vanes installed at an angle inside the ash hopper further guide the airflow, making it more stable and avoiding excessive turbulence, while promoting the settling of coarse dust particles.

[0041] 3. Conical ash hopper design: The ash hopper has a conical structure with a cone angle designed within the range of 40° to 60°. The inner wall of the ash hopper is coated with an anti-adhesion coating to effectively prevent dust from accumulating on the hopper wall and ensure that the settled dust slides smoothly to the bottom of the ash hopper and is finally discharged periodically through an electrically controlled ash discharge valve.

[0042] 2. Filtration stage: Capture of fine particulate dust

[0043] After the initial separation of the airflow, the remaining dust-laden airflow enters the filtration chamber. The bag filter assembly inside the filtration chamber efficiently filters the fine dust particles in the airflow.

[0044] Key mechanisms of the filtration process:

[0045] 1. Airflow distribution plate deceleration and homogenization:

[0046] At the inlet where the airflow enters the filter chamber, multiple inclined airflow distribution plates evenly disperse the high-speed airflow while reducing its velocity to prevent direct impact on the filter bags. This design not only improves filtration efficiency but also effectively reduces localized wear on the filter bags.

[0047] 2. The high-efficiency filtration function of the filter bag assembly:

[0048] The filter bags are made of high-efficiency filter fiber material, and the fiber surface has micron-sized pores that can trap fine dust particles in the airflow.

[0049] The filter bag has a built-in metal support frame to enhance its stability and ensure that the filter bag maintains its shape under airflow without deforming or collapsing.

[0050] 3. Auxiliary functions of the venturi:

[0051] The venturi outlet of the pulse cleaning device is arranged at a certain angle to the central axis of the filter bag, which makes the impact force of the airflow on the filter bag more uniform and avoids local stress concentration that causes filter bag wear.

[0052] In this stage, dust is trapped on the outer surface of the filter bag, while the purified gas passes through the filter bag and enters the clean air chamber located above.

[0053] 3. Homogenization and emission of purified gases

[0054] The gas purified by the filter bags enters the clean air chamber and is further homogenized before being discharged.

[0055] Key mechanisms for purifying gas emissions:

[0056] 1. The homogenizing effect of the flow guiding net:

[0057] The clean air chamber is equipped with multiple layers of airflow guide nets made of corrosion-resistant alloy material. These airflow guide nets have a honeycomb structure and are arranged at certain intervals, which can effectively uniformly distribute the airflow, reduce the degree of turbulence of the gas before discharge, and thus improve the stability of the exhaust.

[0058] 2. Air outlet duct and flexible corrugated pipe design:

[0059] The top of the clean air chamber is connected to an air outlet duct, which contains a flow rate equalization mesh to further homogenize the gas flow rate. To buffer vibrations generated during equipment operation, the air outlet duct is connected to the clean air chamber via a flexible corrugated pipe. This design absorbs vibration energy and reduces mechanical stress during equipment operation.

[0060] 4. Working principle of pulse cleaning device

[0061] As filter bags are used for longer periods, dust gradually accumulates on their outer surface, increasing filtration resistance. To ensure continuous and efficient operation of the equipment, this patented design incorporates an automated pulse cleaning device that uses powerful jets of air to remove dust adhering to the filter bag surface.

[0062] The key mechanism of pulse cleaning:

[0063] 1. Compressed air supply and pulse valve pulse cleaning device:

[0064] The air tank is fixedly installed outside the housing and is kept inflated by an external compressed air supply system. A pulse valve is installed on the air tank's outlet, and the pulse valve opens periodically to release high-pressure compressed air.

[0065] 2. Synergistic effect of the jet nozzle and the venturi tube:

[0066] High-pressure air enters the blowpipe and is sprayed onto the surface of the filter bag through the nozzle.

[0067] The nozzle is fitted with a venturi tube, the inlet diameter of which is larger than the outlet diameter. This can further increase the compressed air velocity and induce the surrounding air to participate in the blowing process, forming a powerful instantaneous airflow.

[0068] The powerful airflow causes the filter bag to expand instantly, causing the dust adhering to the outer surface of the filter bag to detach and fall into the ash hopper.

[0069] 5. Overall operating logic and loop operation

[0070] The pulse bag filter of this patent implements the following cyclic operation logic:

[0071] 1. Gas entry and preliminary separation: Dust-laden gas enters the ash hopper through the air inlet pipe, and coarse dust settles to the bottom of the ash hopper due to inertia.

[0072] 2. Filtration and purification: After the dust-laden gas passes through the airflow distribution plate for optimization, it is then captured by the filter bags to capture fine dust particles, and the purified gas enters the clean air chamber.

[0073] 3. Dust removal operation: The pulse dust removal device is activated periodically to clean the dust accumulated on the outer surface of the filter bag through the high-intensity jetting action of compressed air.

[0074] 4. Dust emission: Dust that settles at the bottom of the ash hopper is periodically discharged from the equipment through an electrically controlled ash discharge valve.

[0075] This operating logic ensures that the equipment maintains high-efficiency filtration capabilities when processing large volumes of dusty gas, while also ensuring long-term stable operation.

[0076] The above is a detailed explanation of the working principle of this patent. Its core lies in the organic combination of structural optimization and dust removal technology, which provides a solid technical foundation for efficient dust removal and stable operation.

[0077] The above describes the specific implementation of this patent. Through optimized design and scientific configuration, the operating efficiency and service life of the pulse bag filter are significantly improved.

[0078] The above-described specific embodiments are typical examples of this patent, but this patent is not limited thereto. Without deviating from the core technical idea of ​​this patent, reasonable changes can be made to its structure, materials and pulse cleaning device logic. All improvements based on this are within the protection scope of this patent.

[0079] The specific embodiments described in this patent are merely illustrative and do not limit the scope of protection of this patent. Various changes and modifications can be made to the specific embodiments of this patent without departing from the spirit and essence of this patent, and all such changes and modifications fall within the scope of this patent.

[0080] It is worth noting that in the description of this patent, "multiple" means two or more, unless otherwise explicitly specified. In this patent, unless otherwise explicitly defined and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection. The circuits described in this patent are all circuits commonly used in the art, and other related components are all existing commonly used components. For those skilled in the art, the specific meaning of the above terms in this patent can be understood according to the specific circumstances.

[0081] It will be apparent to those skilled in the art that this patent is not limited to the details of the exemplary embodiments described above, and that this patent can be implemented in other specific forms without departing from the spirit or essential characteristics of this patent. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this patent is defined by the appended claims rather than the foregoing description. Therefore, it is intended to encompass all variations falling within the meaning and scope of the equivalent elements of the claims within this patent, and no markings in the claims should be regarded as limiting the claims involved.

Claims

1. A pulse jet baghouse dust collector, comprising a housing, a pulse jet cleaning device, an inlet duct, and an outlet duct, characterized in that: The interior of the shell is divided into a dust hopper, a filter chamber, and a clean air chamber by a partition. The dust hopper is located at the bottom of the shell, and its inner wall is coated with an anti-adhesion coating. The dust hopper has a conical structure with a cone angle of 40° to 60° to reduce dust accumulation on the hopper wall. An annular sealing gasket is provided at the connection between the dust hopper and the shell. A guide plate is installed inside the dust hopper. The guide plate is inclined and connected to the inner wall of the dust hopper. A discharge valve is provided below the guide plate. The discharge valve is an electrically controlled valve. The filter chamber is located above the ash hopper. A bag assembly is installed inside the filter chamber. The bag assembly includes vertically arranged filter bags and their supporting ribs. The upper end of each filter bag is connected to a partition plate through a fixed flange. Multiple airflow distribution plates are also installed inside the filter chamber. The airflow distribution plates are fixed at an angle at the inlet of the filter chamber to evenly distribute the dust-laden airflow entering the filter chamber and reduce the direct impact of the airflow on the filter bags. The clean air chamber is located above the filter chamber. The clean air chamber is equipped with a multi-layer guide net made of corrosion-resistant alloy material to homogenize the purified airflow. The top of the clean air chamber is equipped with an air outlet duct connected to the clean air chamber. The pulse cleaning device includes an air tank, a pulse valve, a blowpipe, and a venturi tube. The air tank is fixedly installed outside the housing and connected to the housing via a support frame. The bottom of the support frame is equipped with a vibration-damping rubber pad to reduce the impact of vibration during operation. The air tank inlet is connected to an external compressed air supply. The pulse valve is fixed to the air tank outlet and connected to the blowpipe. The blowpipe is horizontally installed on the upper part of the filter chamber. Multiple nozzles are evenly distributed along the axial direction on the blowpipe. Each nozzle corresponds to the position of the filter bag. A venturi tube is embedded in each nozzle. The inlet diameter of the venturi tube is larger than the outlet diameter to improve the blowing airflow. The air inlet duct is located on the side of the shell, and an adjustable baffle is provided at its inlet. The baffle is manually adjusted to control the airflow and velocity entering the ash hopper. The air outlet duct is located at the top of the shell, and its outlet direction is consistent with the central axis of the top of the clean air chamber. The air outlet duct is equipped with a multi-layer flow velocity homogenizing mesh with a honeycomb structure to reduce the turbulence of the gas emission.

2. The pulse bag filter according to claim 1, characterized in that, The housing consists of an outer shell panel, an inner support frame, and a heat insulation layer. The heat insulation layer is sandwiched between the outer shell panel and the support frame. The top of the housing is equipped with a removable inspection cover to facilitate the maintenance and cleaning of the filter bag assembly and the interior of the clean air chamber.

3. The pulse bag filter according to claim 1, characterized in that, The outlet direction of the venturi tube is arranged at an angle to the central axis of the filter bag to avoid localized wear caused by the direct impact of the jet airflow on the filter bag.

4. The pulse bag filter according to claim 1, characterized in that, The air outlet duct is connected to the clean air chamber by a flexible corrugated pipe, which can buffer the vibration during equipment operation.

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