Filtering and dust removing structure, fold type long filter cartridge and dust removing device

Abstract

The utility model discloses a filtration deashing structure, fold style long filter cartridge and dust collector, filtration deashing structure includes flow guide device, flow guide device includes front section cylinder body, middle section trumpet-shaped cylinder body and tail section cylinder body in proper order from top to bottom, front section cylinder body, middle section trumpet-shaped cylinder body and tail section cylinder body are integrated into one piece, and the front section cylinder body, middle section trumpet-shaped cylinder body and tail section cylinder body are integrated into one piece. The front-section cylinder body, the middle-section trumpet-shaped cylinder body and the tail-section cylinder body are communicated with one another, the inner diameter of the tail-section cylinder body is smaller than that of the front-section cylinder body, the contraction angle between the inner wall of the middle-section trumpet-shaped cylinder body and the inner wall of the front-section cylinder body is theta, and the angle theta is 153-160 degrees. According to the filtering and deashing structure, the contraction flow speed of the flow guide device is increased, the pressure is reduced, and negative pressure is formed, so that low-pressure deashing is realized, effective deashing can be realized by adopting low-pressure deashing in the use process of the fold type long filter cartridge, the energy consumption is reduced, and the service life of the dedusting device is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust removal, and in particular relates to a filtering and cleaning structure, a pleated long filter cartridge and a dust removal device. Background Art

[0002] The pleated dust removal structure has a broad market application prospect due to its small footprint and large air volume, and is especially suitable for occasions with low dust concentration and light dust density. The conventional length of the filter element using this structure is mainly 660mm and 1000mm. Extending its length can not only increase the filtration area, but also reduce the filtration wind speed. However, at this stage, research on filter cartridges with a length of more than 3m has not yet been involved. At present, the pleated design is prone to dust accumulation in the trough and is not easy to remove. This phenomenon is more obvious when the length is more than 2.4 meters.

[0003] The use of a pleated structure can greatly increase the filter area of ​​the filter element within a limited space, thereby reducing the pressure difference of the dust removal system, which is helpful for energy saving and consumption reduction in industrial smoke treatment. However, dust is easily accumulated between the pleats in the pleated design, and there is still a lot of dust after conventional pulse cleaning, resulting in a large residual resistance of the product. The conventional treatment method in engineering applications is to increase the cleaning pressure and pulse time of pulse cleaning. This method can achieve a certain degree of improvement, but it will greatly increase the amount of cleaning air used and thus increase energy consumption, and the increased pressure will cause great scouring when passing through the filter material, causing damage to the filter material, and is of low practicality. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a filtering and cleaning structure, a pleated long filter cartridge and a dust removal device to solve the technical problems of high energy consumption and waste of filter material in the existing dust removal process of the pleated long filter cartridge.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A filtering and cleaning structure comprises a flow guide device, which comprises a front cylindrical body, a middle trumpet-shaped cylindrical body and a rear cylindrical body in order from top to bottom.

[0007] The front cylindrical body, the middle trumpet-shaped cylindrical body and the tail cylindrical body are integrally formed, and the front cylindrical body, the middle trumpet-shaped cylindrical body and the tail cylindrical body are interconnected.

[0008] The inner diameter of the rear cylinder is smaller than the inner diameter of the front cylinder.

[0009] As a further solution of an embodiment of the utility model, the inner diameter at the upper end of the middle trumpet-shaped cylinder is greater than the inner diameter at the lower end of the middle trumpet-shaped cylinder.

[0010] As a further solution of an embodiment of the utility model, the contraction angle between the inner wall of the middle trumpet-shaped cylinder and the inner wall of the front cylindrical body is θ, and the angle θ is 153°-160°.

[0011] Preferably, the contraction angle is 155°.

[0012] The utility model also provides a pleated long filter cartridge, which comprises the filtering and cleaning structure as described above, and the filtering and cleaning structure is fixedly connected to the top of the pleated long filter cartridge.

[0013] The utility model also provides a dust removal device, which comprises the above-mentioned pleated long filter cartridge.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The guide device in the filtering and cleaning structure provided by the utility model realizes self-induced airflow to increase flow rate, and at the same time reduces the flow rate of the primary airflow to reduce scouring. The front cylinder serves as a rapid injection area of ​​the cleaning airflow, and the surrounding airflow is affected by it to accelerate downward flow. After the airflow is fully expanded, it enters the middle trumpet-shaped cylinder. When the airflow enters the rear cylinder, the flow rate increases due to the contraction of the guide device. The pressure in this area decreases to form a negative pressure area, which further induces other airflows in the front cylinder to the middle trumpet-shaped cylinder and the rear cylinder, thereby increasing the airflow entering the filtering and cleaning structure and realizing low-pressure cleaning. The pleated long filter cartridge can achieve effective cleaning by using low-pressure cleaning during working conditions, reduces energy consumption, is not easy to be damaged, and extends the service life of the dust removal device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for use in the embodiment will be briefly introduced below. Obviously, the drawings described below are only examples of the embodiment of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the flow guide device in the embodiment of the utility model;

[0018] Figure 2 This is a structural schematic diagram of the connection between the filter and dust cleaning structure of the embodiment of the utility model and the pleated filter barrel;

[0019] Figure 3 This is a schematic diagram of airflow analysis of the flow guide device in the embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of a pleated long filter cartridge in an embodiment of the utility model;

[0021] Figure 5 This is a graph showing the effect of different angles on the air flow in the embodiment of the present invention.

[0022] Reference numerals:

[0023] 1. flow guide device; 101. front cylindrical body; 102. middle trumpet-shaped cylindrical body; 103. rear cylindrical body;

[0024] 2. Pleated long filter cartridge. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the embodiments of the present invention.

[0027] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0028] The utility model embodiment is a filtering and cleaning structure, including a flow guide device 1, see attached Figure 1 As shown, the guide device 1 includes a front cylindrical body 101, a middle trumpet-shaped cylindrical body 102 and a tail cylindrical body 103. The front cylindrical body 101, the middle trumpet-shaped cylindrical body 102 and the tail cylindrical body 103 are integrally formed, and the front cylindrical body 101, the middle trumpet-shaped cylindrical body 102 and the tail cylindrical body 103 are interconnected, and the inner diameter of the tail cylindrical body 103 is smaller than the inner diameter of the front cylindrical body 101.

[0029] The inner diameter at the upper end of the middle trumpet-shaped cylinder 102 is greater than the inner diameter at the lower end of the middle trumpet-shaped cylinder 102 .

[0030] like Figure 3As shown, fluid flow satisfies three basic laws, namely, the law of conservation of mass, the law of conservation of momentum, and the law of conservation of energy. The continuity equation and the NS equation are the embodiment of the above laws in fluid mechanics. For compressible fluid flow, the energy conservation equation also needs to be considered. Therefore, the three equations are combined, and the Bernoulli equation is used to design the velocity of fluid flowing through different sections to achieve self-induced airflow to increase flow, while reducing the primary airflow velocity to reduce scouring, which is the principle of the preferred solution of the embodiment of the utility model.

[0031] In the embodiment of the utility model, the front section cylinder serves as the first zone of the rapid injection of the cleaning airflow, and the surrounding airflow is affected by it and accelerates to flow downward. After the airflow is fully expanded, it enters the second zone of the middle section trumpet-shaped cylinder. When the airflow enters the third zone of the tail section cylinder, the flow velocity increases due to the contraction of the guide device. According to the Bernoulli equation, the pressure in this area decreases to form a negative pressure zone, which further induces other airflows in the first zone of the front section cylinder to the second zone of the middle section trumpet-shaped cylinder and the third zone of the tail section cylinder, thereby increasing the airflow entering the filtering and cleaning structure and realizing low-pressure cleaning.

[0032] like Figure 1 As shown, in the embodiment of the present utility model, the contraction angle between the inner wall of the middle trumpet-shaped cylinder 102 and the inner wall of the front cylindrical body 101 is θ.

[0033] When the contraction angle θ in the technical solution is confirmed, the angle value range of the contraction angle can be 90 degrees to 180 degrees. When the contraction angle θ is 90 degrees, the guide device is closed and the airflow cannot pass through. When the contraction angle θ is 180 degrees, the airflow does not contract. The preferred contraction angle in the embodiment of the utility model is 153-160 degrees.

[0034] like Figure 5 As shown in the figure, in order to verify the influence of different angles on the air flow, five samples with specifications of 95°, 115°, 135°, 155° and 175° were used to characterize the cleaning effect by measuring the wall peak pressure at different positions of the 6-meter filter cartridge. The results are shown in the figure. Figure 5 As shown, the preferred range of the contraction angle θ is 153-160°, and the best effect is achieved when the contraction angle θ is 155°.

[0035] See also Figure 4 As shown, the embodiment of the utility model provides a pleated long filter cartridge, and the guide device 1 in the above-mentioned filtering and cleaning structure is fixedly connected to the flange plate at the top of the pleated long filter cartridge.

[0036] like Figure 2As shown, the preferred range of contraction angles is selected to make a processed part, which is welded and connected to the pleated filter product to make a long filter cartridge. The length of the filter cartridge can be any length, and the typical length is 1 meter to 6 meters. The technical solution in the embodiment of the utility model is optimal for the 6-meter product. By adding an easy-to-clean structure, the measured induced air flow rate can be increased by 1.47 times, achieving low-pressure cleaning. According to actual operating tests under working conditions, energy saving can reach more than 30%.

[0037] The utility model also provides a dust removal device, which includes the above-mentioned pleated long filter cartridge. Since the dust removal device adopts all the technical solutions of the above-mentioned embodiment, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiment, and prolongs the service life of the dust removal device.

[0038] The above shows and describes the basic principles of the present invention. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only intended to illustrate the principles of the present invention. Without departing from the scope of the present invention, any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A filtering and cleaning structure, characterized in that: The flow guiding device (1) comprises a front cylindrical body (101), a middle trumpet-shaped cylindrical body (102) and a rear cylindrical body (103) in order from top to bottom; The front cylindrical body (101), the middle trumpet-shaped cylindrical body (102) and the tail cylindrical body (103) are integrally formed, and the front cylindrical body (101), the middle trumpet-shaped cylindrical body (102) and the tail cylindrical body (103) are interconnected; The inner diameter of the rear cylindrical body (103) is smaller than the inner diameter of the front cylindrical body (101).

2. A filtering and cleaning structure according to claim 1, characterized in that: The inner diameter at the upper end of the middle trumpet-shaped cylinder (102) is greater than the inner diameter at the lower end of the middle trumpet-shaped cylinder (102).

3. A filtering and cleaning structure according to claim 2, characterized in that: The contraction angle between the inner wall of the middle trumpet-shaped cylinder (102) and the inner wall of the front cylindrical body (101) is θ, and the contraction angle is 153°-160°.

4. A filtering and cleaning structure according to claim 3, characterized in that: The contraction angle is 155°.

5. A pleated long filter cartridge, characterized in that: The pleated long filter cartridge includes a filtering and cleaning structure as described in any one of claims 1 to 4, and the guide device is fixedly connected to the top end of the pleated long filter cartridge.

6. A dust removal device, characterized in that: The dust removal device includes the pleated long filter cartridge as described in claim 5.

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