A dust removal filter cartridge for a heating boiler

Abstract

The utility model discloses a dust filter cartridge for heating boiler, including at least two filter cartridge short sections, the filter cartridge short section between each through detachable screw thread connection mechanism head to tail connection, combination forms complete filter cartridge whole, the sealing structure is provided between the adjacent connecting end face between each filter cartridge short section, the screw thread connection mechanism includes the male joint of setting in filter cartridge short section one end and the female joint of setting in the other end, through the screw thread connection between the male joint and the female joint, the sealing structure includes the mounting groove and the sealing ring, the mounting groove is set up in filter cartridge short section female joint end, the sealing ring is embedded in the mounting groove, the sealing ring is made of high temperature -resistant silica gel or fluorine rubber material, and the independent replacement of filter cartridge short section is realized through detachable screw thread connection mechanism, when the filter cartridge section because of fatigue tear or wear perforation failure, only needs to replace the filter cartridge short section of corresponding damage, need not the whole replacement filter cartridge, has obviously reduced the waste of intact filter material.

Description

Technical Field

[0001] This utility model belongs to the technical field of filter cartridge dust collector accessories, specifically relating to a dust collector filter cartridge for heating boilers. Background Technology

[0002] Pulse jet filter cartridges are key equipment in flue gas purification systems for heating boilers, with the filter cartridge, a slender cylindrical component, being the core component. In actual operation, the filter cartridge must continuously withstand alternating loads of negative suction pressure and positive pressure from pulse jet cleaning. Existing filter cartridges have a one-piece structure, and the damage mechanisms in different sections differ significantly: the upper section, being fixed and directly subjected to the impact of the pulse airflow, experiences highly concentrated stress, making the roots of the filter media pleats prone to tearing and delamination due to mechanical fatigue; the lower section primarily bears the continuous scouring of high-concentration dust and potential corrosion, leading to progressive wear, thinning, and perforation of the filter media.

[0003] Currently, when any part of the filter cartridge fails, the entire cartridge must be replaced. This not only incurs high maintenance costs but also results in a significant waste of material from still intact sections, making it uneconomical. Therefore, there is an urgent need for a new filter cartridge structure designed to address the distinct failure modes of the upper and lower sections, enabling segmented replacement after partial damage, thereby significantly reducing maintenance costs and improving material utilization. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dust removal filter cartridge for heating boilers, comprising at least two filter cartridge short sections, wherein each filter cartridge short section is connected end to end by a detachable threaded connection mechanism to form a complete filter cartridge assembly, and a sealing structure is provided between adjacent connecting end faces of each filter cartridge short section.

[0005] As a preferred embodiment of this utility model, the threaded connection mechanism includes a male connector disposed at one end of the filter cartridge short section and a female connector disposed at the other end, wherein the male connector and the female connector are connected by a thread.

[0006] As a preferred embodiment of this utility model, the sealing structure includes an installation groove and a sealing ring. The installation groove is located at the end of the male connector of the filter cartridge short section, and the sealing ring is embedded in the installation groove. The sealing ring is made of high-temperature resistant silicone or fluororubber material.

[0007] As a preferred technical solution of this utility model, the upper part of the topmost filter cartridge section is fixed with a connection port for fixing to the dust collector tube sheet.

[0008] As a preferred technical solution of this utility model, at least one of the filter cartridge short sections located at the top is made of filter material with high tensile strength and fatigue resistance.

[0009] As a preferred embodiment of this utility model, at least one of the lower filter cartridge sections has a filter media surface covered with a wear-resistant coating or uses a wear-resistant treated filter media.

[0010] As a preferred technical solution of this utility model, the frame of the filter cartridge section is made of metal, and it is integrally formed with the male connector and the female connector by welding.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] (1) Compared with the traditional integrated filter cartridge, this utility model enables the independent replacement of the filter cartridge short section through a detachable threaded connection mechanism. When a section of the filter cartridge fails due to fatigue tearing or wear perforation, only the corresponding damaged filter cartridge short section needs to be replaced, without replacing the entire filter cartridge. This significantly reduces the waste of intact filter media and greatly reduces maintenance costs and spare parts inventory pressure.

[0013] (2) Based on the different failure mechanisms of the upper and lower parts of the filter cartridge, the filter cartridge short sections at different locations are designed differently. The upper part uses fatigue-resistant filter material to resist mechanical damage caused by pulse impact, and the lower part uses wear-resistant filter material to resist dust erosion, so that the performance of the filter material in each section is precisely matched with the working conditions, effectively extending the overall service life of the filter cartridge.

[0014] (3) The sealing structure formed by the mounting groove and the sealing ring creates a reliable seal at the connection of the filter cartridge short section, avoiding the problem of reduced dust removal efficiency caused by flue gas leakage. The sealing ring is made of high-temperature resistant silicone or fluororubber material, which can adapt to the high-temperature environment of boiler flue gas and ensure the sealing stability during long-term operation.

[0015] (4) The integrated welding structure of the metal frame and the male and female connectors enhances the overall rigidity and connection strength of the filter cartridge short section, enabling it to withstand long-term alternating loads without easily deforming. At the same time, the overall length of the filter cartridge can be flexibly adjusted by increasing or decreasing the number of filter cartridge short sections, making it suitable for different specifications of pulse filter cartridge dust collectors and possessing strong versatility. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is an exploded view of the present invention;

[0019] Figure 3 This is an exploded view of the present invention from another perspective;

[0020] In the diagram: 1. Filter cartridge section; 2. Male connector; 3. Female connector; 4. Mounting groove; 5. Sealing ring; 6. Connection port. Detailed Implementation

[0021] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example

[0023] Please see Figure 1-3 The present invention provides the following technical solution: a dust removal filter cartridge for heating boilers, comprising at least two filter cartridge short sections 1, wherein each filter cartridge short section 1 is connected end to end by a detachable threaded connection mechanism to form a complete filter cartridge assembly, and a sealing structure is provided between adjacent connecting end faces of each filter cartridge short section 1.

[0024] In order to achieve a detachable connection of the filter cartridge section 1 so that it can be replaced in sections after partial damage, in this embodiment, as a preferred technical solution of the present invention, the threaded connection mechanism includes a male connector 2 disposed at one end of the filter cartridge section 1 and a female connector 3 disposed at the other end, and the male connector 2 and the female connector 3 are connected by threads.

[0025] In order to ensure the sealing performance of the connection part of the filter cartridge short section 1 and prevent the flue gas from leaking at the connection, in this embodiment, as a preferred technical solution of the present invention, the sealing structure includes an installation groove 4 and a sealing ring 5. The installation groove 4 is opened at the end of the male connector 2 of the filter cartridge short section 1, and the sealing ring 5 is embedded in the installation groove 4. The sealing ring 5 is made of high temperature resistant silicone or fluororubber material.

[0026] In order to achieve stable installation and fixation of the filter cartridge as a whole with the dust collector tube sheet, in this embodiment, as a preferred technical solution of the present invention, the upper part of the top filter cartridge section 1 is fixed with a connection port 6 for fixing with the dust collector tube sheet.

[0027] In order to enhance the fatigue resistance of the upper filter cartridge section 1 and resist mechanical fatigue damage caused by alternating pulse jet and negative pressure loads, in this embodiment, as a preferred technical solution of the present invention, at least one filter cartridge section 1 located at the top is made of filter material with high tensile strength and fatigue resistance.

[0028] In order to improve the wear resistance of the lower filter cartridge section 1 and resist the continuous scouring effect of high concentration of dust, in this embodiment, as a preferred technical solution of the present invention, at least one filter cartridge section 1 at the bottom has a wear-resistant coating on its filter material surface or uses a wear-resistant treated filter material.

[0029] In order to enhance the overall structural strength and rigidity of the filter cartridge section 1 and ensure structural stability under alternating loads, in this embodiment, as a preferred technical solution of the present invention, the frame of the filter cartridge section 1 is made of metal and is integrally formed with the male connector 2 and the female connector 3 by welding.

[0030] In summary, with the help of the above-described technical solution of this utility model,

[0031] The dust collector filter cartridge for the heating boiler adopts a modular segmented design, achieving functional combination through at least two independent filter cartridge short sections 1. During assembly, the standardized threaded connection mechanism at both ends of the filter cartridge short section 1 is used to complete the splicing: the male connector 2 (external thread structure) of the first filter cartridge short section 1 and the female connector 3 (internal thread structure) of the second filter cartridge short section 1 are mechanically connected by thread engagement. The thread fit accuracy ensures the connection strength while reserving space for the compression of the sealing ring 5.

[0032] After adjacent filter cartridge sections 1 are joined together, the sealing ring 5 embedded in the annular mounting groove 4 (2-3mm deep, width matching the cross-sectional diameter of the sealing ring 5) at the end of the male connector 2 undergoes radial compression, forming the first sealing barrier, which can effectively block the leakage path of flue gas in the thread gap.

[0033] During dust collector operation, the connection port 6 at the top of the uppermost filter cartridge section 1 is rigidly fixed to the dust collector tube sheet via a flange, snap-fit ​​structure, or clamping mechanism. An auxiliary sealing gasket is installed at the contact point between the connection port 6 and the tube sheet to ensure that the filter cartridge as a whole is isolated from the air path of the dust collection system. When boiler flue gas enters the filter cartridge area, the airflow passes from top to bottom through the filter media channel of the filter cartridge section 1 to achieve dust filtration. To address the different operating conditions in different sections, the upper filter cartridge section 1 uses a composite filter media reinforced in both warp and weft directions (such as a combination structure with aramid fiber as the base fabric and PTFE membrane as the surface layer). This media can withstand the instantaneous positive pressure impact generated during pulse jet cleaning, as well as the negative pressure load formed by continuous suction. The material's toughness alleviates stress concentration at the root of the folds.

[0034] The lower filter cartridge section 1 uses filter media with a silicon carbide wear-resistant coating, which can withstand the continuous scouring of high-concentration dust in flue gas. The metal frame of the filter cartridge section 1 is made of cold-rolled steel plate and is connected to the male connector 2 and female connector 3 by welding. This ensures that the connection does not loosen under the high-frequency vibration of pulse jet cleaning, providing a stable support structure for the filter media and preventing mechanical damage to the filter media due to excessive deformation.

[0035] Finally, it should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 dust collector filter cartridge for heating boilers, characterized in that: It includes at least two filter cartridge sections (1), and each of the filter cartridge sections (1) is connected end to end by a detachable threaded connection mechanism to form a complete filter cartridge. A sealing structure is provided between the adjacent connecting end faces of each of the filter cartridge sections (1).

2. The dust collector filter cartridge for a heating boiler according to claim 1, characterized in that: The threaded connection mechanism includes a male connector (2) located at one end of the filter cartridge section (1) and a female connector (3) located at the other end, and the male connector (2) and the female connector (3) are connected by threads.

3. The dust collector filter cartridge for a heating boiler according to claim 2, characterized in that: The sealing structure includes an installation groove (4) and a sealing ring (5). The installation groove (4) is opened at the end of the male connector (2) of the filter cartridge short section (1). The sealing ring (5) is embedded in the installation groove (4). The sealing ring (5) is made of high-temperature resistant silicone or fluororubber material.

4. A dust collector filter cartridge for a heating boiler according to claim 1, characterized in that: The topmost filter cartridge section (1) has a connection port (6) fixed to the upper part for fixing to the dust collector tube sheet.

5. A dust collector filter cartridge for a heating boiler according to claim 1, characterized in that: At least one of the filter cartridge sections (1) located at the top is made of filter material with high tensile strength and fatigue resistance.

6. A dust collector filter cartridge for a heating boiler according to claim 1, characterized in that: At least one filter cartridge section (1) located at the bottom has a filter media surface covered with an abrasion-resistant coating or uses abrasion-treated filter media.

7. A dust collector filter cartridge for a heating boiler according to claim 2, characterized in that: The frame of the filter cartridge section (1) is made of metal and is integrally formed by welding with the male connector (2) and the female connector (3).

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