Venturi-based filter cartridge dust collector pulse cleaning flow guide device

Abstract

The utility model discloses a filter cartridge dust remover pulse dust removal flow guide device based on venturi, relates to industrial flue gas treatment technical field, including the venturi flow guide cylinder of fixed in the filter cartridge top entrance end, the venturi flow guide cylinder includes the coaxial fixed upper section cylinder and contraction cylinder, and the bottom of upper section cylinder is connected with the top of contraction cylinder, and the bottom diameter of upper section cylinder, the top diameter of contraction cylinder all are same with the outer diameter of filter cartridge, the contraction angle of contraction cylinder is 23~25 DEG, and the bottom of contraction cylinder is fixed in filter cartridge top entrance end, and the bottom diameter of contraction cylinder is same with the inner diameter of filter cartridge, and the nozzle that is equipped with the direct top of venturi flow guide cylinder.

Description

Technical Field

[0001] This utility model relates to the field of industrial flue gas treatment technology, and particularly to the field of filter cartridge cleaning technology, specifically a pulse cleaning and diversion device for a filter cartridge dust collector based on a venturi tube. Background Technology

[0002] Compared to round filter bags, cartridge filters have several significant advantages: 1) The design of cartridge filters typically increases the effective filtration area; 2) Cartridge dust collectors are suitable for applications with low dust concentrations and light dust particles; 3) Cartridge filters are usually designed to be compact and easy to install; 4) Cartridge filters are made from a variety of materials. Common materials include metals such as stainless steel, copper, aluminum, and titanium, as well as plastic or fiber materials. Metal cartridges are generally resistant to high temperatures and corrosion, while fiber cartridges have an interwoven fiber structure, resulting in better filtration; 5) Cartridge dust collectors have a relatively small footprint, making them suitable for smaller workshops and factories. This helps save space, improve space utilization, and reduce interference with existing equipment. Therefore, cartridge filters are widely promoted and used.

[0003] Filter cartridges are widely used in the purification of dusty gases emitted from industrial kilns. However, during use, filter cartridges are easily affected by the depth and spacing of the pleats, which can lead to problems such as caking, bag clogging, and dust accumulation. This not only reduces the effective filtration area of ​​the filter cartridge but also increases the system's operating resistance, accelerates the wear and corrosion of the filter material by dust, and affects the service life of the filter cartridge.

[0004] Furthermore, conventional filter cartridges are mostly 200mm in diameter and 660mm~1000mm in length. However, to meet specific working conditions and placement limitations, longer dust collector filter cartridges are sometimes selected, resulting in poor dust removal at the bottom of the cartridge. This is especially true when the compressed air volume and pressure during pulse-jet cleaning are insufficient, making dust removal at the bottom of the cartridge even more difficult. The dust layer at the bottom of the cartridge will gradually accumulate and may gradually clog the filter gaps of the filter media, leading to reduced dust removal efficiency, increased operating resistance of the cartridge dust collector, and affecting the overall performance of the equipment.

[0005] Existing research mainly focuses on optimizing the pleated structure parameters and filter cartridge structure of conventional 660 mm and 1000 mm filter cartridges. For cleaning long filter cartridges, the common methods are to increase the amount of compressed air and the blowing pressure during the blowing process, or simply reduce the length of the filter cartridge. On the one hand, this cannot meet the needs of the production process, and on the other hand, it causes additional waste of resources. Utility Model Content

[0006] To address the problems encountered in current cartridge dust collector pulse cleaning processes, such as poor bottom cleaning effect, dust accumulation, gradual blockage of filter media gaps, reduced dust removal efficiency, and increased operating resistance, this invention provides a venturi tube-based pulse cleaning flow guiding device for cartridge dust collectors.

[0007] This utility model is achieved using the following technology:

[0008] This utility model provides a pulse cleaning flow guiding device for a cartridge dust collector based on a Venturi tube, including a Venturi guide tube fixed at the top inlet end of the cartridge; the Venturi guide tube includes an upper cylindrical section and a shrinking cylinder coaxially fixed, the bottom end of the upper cylindrical section is fixedly connected to the top end of the shrinking cylinder, and the bottom diameter of the upper cylindrical section and the top diameter of the shrinking cylinder are the same as the outer diameter of the cartridge; the shrinking cylinder has a shrinkage angle of 23 to 25°, the bottom end of the shrinking cylinder is fixed at the top inlet end of the cartridge, and the bottom diameter of the shrinking cylinder is the same as the inner diameter of the cartridge; a nozzle is provided directly above the Venturi guide tube.

[0009] In practice, it includes a Venturi guide tube fixed at the top inlet end of the filter cartridge. The filter cartridge is 3 to 6 m long and can be used for filter cartridges that are longer than those in the prior art. The Venturi guide tube is welded to the top inlet end of the filter cartridge.

[0010] The Venturi guide tube consists of a coaxially fixed upper cylindrical section and a contraction tube. Utilizing the design principles of the Venturi tube, the Venturi guide tube increases the area of ​​the filter cartridge inlet, thereby improving the volume of injected air. The Venturi guide tube is made of cast stainless steel. The bottom end of the upper cylindrical section is fixedly connected to the top end of the contraction tube, and the diameters of both the bottom and top ends of the upper cylindrical section and the contraction tube are the same as the outer diameter of the filter cartridge. The contraction angle of the contraction tube is 23–25°, and its bottom end is fixed to the top inlet end of the filter cartridge, with the bottom diameter being the same as the inner diameter of the filter cartridge.

[0011] A nozzle is located directly above the Venturi tube. The nozzle, Venturi tube, and filter cartridge are coaxially arranged. The nozzle has a blowing pressure range of 0.3–0.6 MPa and a blowing time of 100 ms. The distance between the nozzle and the top of the Venturi tube is 10 times the nozzle diameter. The nozzle is circular with a diameter of 18–30 mm and a distance between the nozzle and the top of the Venturi tube of 180–300 mm.

[0012] When in use, when the pulse jet valve is opened, compressed air is ejected at high speed from the nozzle. After entering the Venturi guide tube, it is restricted by the tube wall of the upper cylindrical section, which reduces the diffusion of the airflow. It then enters the contraction tube of the Venturi guide tube. The conical cross-section of the contraction tube accelerates the airflow again and entrains the induced airflow near the top of the Venturi guide tube into the interior of the filter cartridge. The jet airflow moves from the top to the bottom of the filter cartridge, and the dust layer on the surface of the filter element is stripped off by the impact of the airflow and falls into the dust collection chamber.

[0013] As another approach, the Venturi guide tube adopts a three-section design, including an upper cylindrical tube, a contraction tube, and a lower cylindrical tube. The lower cylindrical tube is fixed to the bottom end of the contraction tube, and the diameter of the lower cylindrical tube is the same as the bottom diameter of the contraction tube. The lower cylindrical tube can be inserted into the filter cartridge inlet for fixation, making the operation simpler.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention discloses a pulse cleaning flow guiding device for a cartridge dust collector based on a venturi tube, which makes full use of the design principle of the venturi tube, increases the filter cartridge opening area, and improves the amount of blowing air.

[0016] This utility model can be added to the filter cartridge inlet without increasing energy consumption, resulting in extremely low modification costs and no waste of existing equipment for enterprises. Furthermore, the specifications and blowing parameters of the Venturi flow guiding device can be flexibly adjusted according to different parameters such as the inner and outer diameters and length of the filter cartridge to achieve effective dust removal at the bottom of the filter cartridge.

[0017] This utility model solves the problems of uneven pressure and poor dust removal effect at the bottom of long filter cartridges. It achieves effective dust removal at the bottom of the filter cartridge without increasing energy consumption, realizes uniform dust removal of long filter cartridges, effectively increases the filtration area, extends the effective service length of the filter cartridge, saves costs and energy consumption, ensures the stability of the filter cartridge of the cartridge dust collector, protects the operating resistance of the dust collector and extends its service life, and provides guidance for the design and application of large-scale filter cartridges. Attached Figure Description

[0018] Figure 1 This is a front view of the structure of the device in its operational state.

[0019] Figure 2 This is a side view of the structure of the device in its operational state.

[0020] Figure 3 This is a top view of the structure of the device in its operational state.

[0021] Figure 4 This is a schematic diagram of the structure of the Chinese-style flow guide tube in Example 1.

[0022] Figure 5 This is a three-dimensional schematic diagram of the use of this device.

[0023] Figure 6 This is a schematic diagram of the structure of the Chinese-style flow guide tube in Example 2.

[0024] In the diagram: 1. Nozzle; 2. Venturi tube; 201. Upper cylindrical section; 202. Shrink tube; 203. Lower cylindrical section; 3. Filter cartridge. Detailed Implementation

[0025] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Example 1

[0026] A pulse cleaning and flow guiding device for a cartridge dust collector based on a venturi tube, such as... Figures 1-5 As shown, the filter cartridge 3 includes a Venturi guide tube 2 fixed at the top inlet end of the filter cartridge 3. The length of the filter cartridge 3 is 3 to 6 m, which can be used for filter cartridges 3 that are longer than those in the prior art. The Venturi guide tube 2 is welded to the top inlet end of the filter cartridge 3.

[0027] The Venturi guide tube 2 includes an upper cylindrical tube 201 and a contraction tube 202, which are coaxially fixed. The Venturi guide tube 2 makes full use of the design principle of the Venturi tube, increases the area of ​​the filter cartridge 3 inlet, and improves the blowing air volume. The Venturi guide tube 2 is made of stainless steel casting. The bottom end of the upper cylindrical tube 201 is fixedly connected to the top end of the contraction tube 202, and the bottom diameter of the upper cylindrical tube 201 and the top diameter of the contraction tube 202 are the same as the outer diameter of the filter cartridge 3. The contraction angle of the contraction tube 202 is 25°. The bottom end of the contraction tube 202 is fixed at the top inlet end of the filter cartridge 3, and the bottom diameter of the contraction tube 202 is the same as the inner diameter of the filter cartridge 3. In this embodiment, the inner diameter of the filter cartridge 3 is 90 mm and the outer diameter is 150 mm.

[0028] A nozzle 1 is located directly above the Venturi guide tube 2. The nozzle 1, the Venturi guide tube 2, and the filter cartridge 3 are coaxially arranged. The blowing pressure of the nozzle 1 ranges from 0.3 to 0.6 MPa, and the blowing time is 100 ms. The distance between the nozzle 1 and the top of the Venturi guide tube 2 is 10 times the diameter of the nozzle 1. The nozzle 1 is a circular nozzle with a diameter of 18 to 30 mm. The distance between the nozzle 1 and the top of the Venturi guide tube 2 is 180 to 300 mm.

[0029] When in use, when the pulse jet valve is opened, compressed air is ejected at high speed from nozzle 1. After entering the Venturi guide tube 2, it is restricted by the tube wall of the upper cylindrical tube 201, which reduces the diffusion of the airflow. It then enters the contraction tube 202 of the Venturi guide tube 2. The conical cross section of the contraction tube 202 accelerates the airflow again and entrains the induced airflow near the top of the Venturi guide tube 2 into the interior of the filter cartridge 3. The jet airflow moves from the top to the bottom of the filter cartridge 3. The dust layer on the surface of the filter element is stripped off by the impact of the airflow and falls into the dust collection chamber. Example 2

[0030] A pulse cleaning and flow guiding device for a cartridge dust collector based on a venturi tube, such as... Figure 6 As shown, the Venturi guide tube 2 adopts a three-section design, including an upper cylindrical tube 201, a contraction tube 202, and a lower cylindrical tube 203. The lower cylindrical tube 203 is fixed to the bottom end of the contraction tube 202. The diameter of the lower cylindrical tube 203 is the same as the diameter of the bottom end of the contraction tube 202. The lower cylindrical tube 203 can be inserted into the filter cartridge inlet for fixation, making the operation simpler.

[0031] Except for the structure of the Venturi guide tube 2, the rest of the structure is the same as in Example 1.

[0032] The scope of protection claimed by this utility model is not limited to the specific embodiments described above. Moreover, for those skilled in the art, this utility model can have various modifications and alterations. Any modifications, improvements, and equivalent substitutions made within the concept and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pulse cleaning and flow guiding device for a filter cartridge (3) dust collector based on a venturi tube, characterized in that: Includes a Venturi guide tube (2) fixed at the top inlet end of the filter cartridge (3); The Venturi guide tube (2) includes an upper cylindrical tube (201) and a shrinking tube (202) fixed coaxially. The bottom end of the upper cylindrical tube (201) is fixedly connected to the top end of the shrinking tube (202), and the bottom diameter of the upper cylindrical tube (201) and the top diameter of the shrinking tube (202) are the same as the outer diameter of the filter tube (3). The shrinking angle of the shrinking tube (202) is 23-25°. The bottom end of the shrinking tube (202) is fixed at the top inlet end of the filter tube (3), and the bottom diameter of the shrinking tube (202) is the same as the inner diameter of the filter tube (3). The nozzle (1) is located directly above the Venturi tube (2).

2. The pulse cleaning and diversion device for a filter cartridge (3) dust collector based on a venturi tube according to claim 1, characterized in that: The bottom end of the shrinking cylinder (202) is fixed with a lower cylindrical section (203), and the diameter of the lower cylindrical section (203) is the same as the diameter of the bottom end of the shrinking cylinder (202).

3. A pulse cleaning and diversion device for a filter cartridge (3) dust collector based on a venturi tube according to claim 1 or 2, characterized in that: The nozzle (1), venturi guide tube (2) and filter cartridge (3) are arranged coaxially.

4. A pulse cleaning and diversion device for a filter cartridge (3) dust collector based on a venturi tube according to claim 1 or 2, characterized in that: The distance between the nozzle (1) and the top of the venturi tube (2) is 10 times the diameter of the nozzle (1).

5. The pulse cleaning and diversion device for a filter cartridge (3) dust collector based on a venturi tube according to claim 4, characterized in that: The nozzle (1) is a circular nozzle (1) with a diameter of 18 to 30 mm. The distance between the nozzle (1) and the top of the Venturi guide tube (2) is 180 to 300 mm. The spraying pressure of the nozzle (1) is 0.3 to 0.6 MPa and the spraying time is 100 ms.

6. A pulse cleaning and diversion device for a filter cartridge (3) dust collector based on a venturi tube according to claim 1 or 2, characterized in that: The Venturi guide tube (2) is made of stainless steel casting and is welded to the top inlet end of the filter tube (3).

7. A pulse cleaning and diversion device for a filter cartridge (3) dust collector based on a venturi tube according to claim 1 or 2, characterized in that: The filter cartridge (3) has a length of 3 to 6 m.

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