Pleated filter cartridge

Abstract

The utility model discloses a pleated filter cartridge, which comprises a pleated filter material, an upper end cover and a lower end cover, the upper end cover and the lower end cover are respectively arranged at two ends of the pleated filter material, the upper end cover is provided with a tubesheet hole connected with a tubesheet, and the cross section of the pleated filter material is elliptical; the cross section of the upper end cover and the cross section of the pattern plate hole are arranged to be in a coaxial oval shape. According to the utility model, the radial contact area of the filter cartridge and the tubesheet is larger, and the radial diameters are unequal, so that the mounting stability of the filter cartridge is better, and the phenomena of deviation and rotation are avoided.

Description

Technical Field

[0001] This utility model relates to a filter cartridge, and more specifically, to a pleated filter cartridge. Background Technology

[0002] Pleated filter cartridges are elongated, slender filtration components commonly used in industrial dust collection equipment, replacing traditional filter bags. They consist of multiple layers of filter media, commonly including spunbond polyester, PTFE membranes, and microfiber layers, all of which offer excellent filtration performance and corrosion resistance. The internal center mesh of the pleated cartridge replaces filter bags and their supporting cages. Pleated filter cartridges are widely used in various industrial dust collection applications, such as mining, metallurgy, chemical, cement, building materials, power, and light industry. Their high efficiency, energy saving, and environmental friendliness make them crucial for dust control. Pleated filter cartridges boast high filtration efficiency, reaching 99.7%–99.9%, and low operating resistance, making them suitable for high-concentration dust conditions. Furthermore, the cleaning system design of pleated filter cartridges ensures better cleaning performance, simple maintenance, and a long service life.

[0003] like Figure 1 and Figure 2 As shown, a conventional pleated filter cartridge mainly consists of pleated filter media 1 (with an external protective strip 2 covering the pleated filter media 1), with an upper end cap 3 and a lower end cap 4 at each end. The pleated filter media 1 is placed on an inner frame 5. The cross-section of this pleated filter cartridge is circular, and the perforated plate holes 6 used for installation at the ends are also circular. During installation and use, rotation occurs, causing the bottom of the bag to collide and bridge, resulting in damage to the filter element and reduced service life. Furthermore, irregular movement of the filter cartridge during pulse jet cleaning causes loosening and poor sealing during installation. Additionally, there are problems such as the filtration area and dust removal effect not being fully utilized within the effective space. Utility Model Content

[0004] In view of the defects existing in the prior art, the purpose of this utility model is to provide a pleated filter cartridge with a larger radial contact area with the tube sheet and a different radial diameter, which makes the installation stability of the filter cartridge better and prevents offset and rotation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pleated filter cartridge includes a pleated filter material and an upper end cover and a lower end cover respectively disposed at both ends of the pleated filter material. The upper end cover has a perforated plate hole for connecting with a perforated plate.

[0007] The cross-section of the pleated filter media is set to be elliptical;

[0008] The cross-sections of the upper end cover and the perforated plate hole are set to coaxial ellipses.

[0009] Preferably, the ratio between the minor diameter and the major diameter on the ellipse is 1:1.25.

[0010] Preferably, the length of the pleated filter media is set to within 3000 mm.

[0011] Preferably, the included angle on the pleated filter material is set between 15° and 20°.

[0012] The pleated filter cartridge provided by this utility model has the following beneficial effects:

[0013] 1) Due to the larger radial contact area between the upper end cover and the tube sheet and the different radial diameters in this utility model, the filter cartridge has better installation stability and will not have any offset or rotation phenomena.

[0014] 2) The pleated filter material and the elliptical upper cap design of this utility model can avoid the bottom of the bag from colliding and bridging during the installation and use of traditional round filter cartridges;

[0015] 3) This utility model can avoid the irregular movement of the filter cartridge during the pulse jet blowing process, which would cause it to loosen (avoiding the lack of sealing during the operation of conventional circular filter cartridges);

[0016] 4) In terms of filtration area and dust removal effect, this utility model has a larger filtration area (relative to the diameter of a circular filter cylinder of 150) under the same space conditions, and the filtration area can be increased by 10% to 25% (under the same included angle).

[0017] 5) Under the same space and filtration area requirements, the pleated filter material in this utility model can have a smaller fold spacing or fewer pleats; the dust removal effect is better; and the dust removal frequency can be reduced by about 15%. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an existing pleated filter cartridge;

[0019] Figure 2 This is a schematic diagram of the cross-section of an existing pleated filter cartridge;

[0020] Figure 3 This is a schematic diagram of the structure of the pleated filter cartridge of this utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of the pleated filter material in this utility model;

[0022] Figure 5 This is a cross-sectional schematic diagram of the upper end cap in this utility model. Detailed Implementation

[0023] To better understand the above-mentioned technical solution of this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Combination Figures 3 to 5 As shown, the present invention provides a pleated filter cartridge, including a pleated filter media 10, and an upper end cover 11 and a lower end cover 12 respectively installed at both ends of the pleated filter media 10. The upper end cover 11 has a perforated hole for connecting with a perforated plate. The pleated filter media 10 is installed on an inner frame 13. The above is the prior art and will not be described in detail here.

[0025] Unlike existing technologies, the cross-section of the pleated filter material 10 in the pleated filter cartridge of this utility model is set to be elliptical.

[0026] Meanwhile, the cross-section of the upper cover 11 and the hole in the flower plate above it is set to be a coaxial ellipse.

[0027] The ratio between the minor diameter and the major diameter of an ellipse is 1:1.25. For example, if the minor diameter of an ellipse is set to 150mm, then the corresponding major diameter of the ellipse is set to 165mm.

[0028] The length of the pleated filter media 10 is set to be within 3000mm.

[0029] The upper cover 11 has an elliptical cross-section. Due to its larger radial contact area with the tube sheet and its unequal radial diameter, the pleated filter cartridge of this invention has better installation stability and will not experience offset or rotation. It also avoids the bag bottom collision and bridging phenomena that occur with traditional circular filter cartridges during installation and use; it also avoids irregular movement of the filter cartridge during pulse jet cleaning, which could cause loosening (avoiding the lack of sealing in traditional circular filter cartridges during operation).

[0030] The cross-section of the pleated filter media 10 is set to an elliptical shape, resulting in a certain filtration area and dust removal effect.

[0031] 1) Larger filtration area within the same space. Compared to a traditional 150mm diameter circular filter cartridge, the filtration area can be increased by 10% to 25% (assuming the included angle on the pleated filter media 10 is the same).

[0032] 2) In the same space, with the same required filtration area, the fold spacing can be smaller or the number of folds can be fewer, resulting in better dust removal effect and a 15% reduction in dust removal frequency. Compared to traditional circular filter cartridges, the included angle on the filter media is approximately 18.6° under normal conditions; however, in the pleated filter cartridge of this utility model, the pleated filter media 10 increases the filtration area by 10% with the same number of folds, and the included angle α on the pleated filter media 10 is 19.1°.

[0033] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any changes or modifications to the above embodiments within the scope of the essential spirit of the present utility model will fall within the scope of the claims of the present utility model.

Claims

1. A pleated filter cartridge, comprising pleated filter media, and upper and lower end caps respectively disposed at both ends of the pleated filter media, wherein the upper end cap has a perforated plate hole for connection with a perforated plate, characterized in that: The cross-section of the pleated filter media is set to be elliptical; The cross-sections of the upper end cover and the perforated plate hole are set to coaxial ellipses.

2. The pleated filter cartridge according to claim 1, characterized in that: The ratio between the minor and major diameters of the ellipse is 1:1.

25.

3. The pleated filter cartridge according to claim 1, characterized in that: The length of the pleated filter media is set to be within 3000mm.

4. The pleated filter cartridge according to claim 1, characterized in that: The included angle on the pleated filter media is set between 15° and 20°.

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