A gas precision filtering and dust removing device

Abstract

The present application relates to the technical field of gas filtration, and discloses a gas precision filtration and dust removal device, which comprises a first cabinet, a second cabinet installed above the first cabinet and communicated with the first cabinet, and a hole plate layer installed between the first cabinet and the second cabinet, wherein an opening is formed in the hole plate layer, a short connecting pipe is connected in the opening, a filter bag is installed in the short connecting pipe, a supporting rod and a supporting frame extending into the second cabinet and supporting the filter bag are arranged in the first cabinet, and the installation and daily maintenance activities are all arranged on the raw material side before the material gas passes through the filter bag, so that the influence of fine impurities generated by manual operation and mechanical friction on product quality is avoided; when the filter bag needs to be cleaned, the filter bag can be obviously deformed by negative pressure collapse / positive pressure expansion, and a significant cleaning effect is obtained; and according to the changed situation, the assembly mode can be simply changed, so that the structure commonly used in the prior art can be changed, and the device has wider adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas filtration, in particular to a gas precision filtration and dust removal device. BACKGROUND

[0002] The cloth bag dust removal is a widely used method, which has the advantages of simplicity, convenience and large flux. However, the application field of the current large flux cloth bag dust remover is mainly in the gas dust removal standard emission. However, for the case that the filtered gas cannot contain visible impurity particles, it is difficult to directly use the existing dust remover. For example, if the solid powder formed by the filtered gas is sampled, dissolved and filtered, as long as there is one or two black spots or impurity particles visible to the naked eye in a large amount of solid sample, it may be checked and thus may be judged as unqualified.

[0003] The above problems cannot be completely solved by simply selecting a filter cloth with appropriate filtering precision, because the current main equipment still has problems of possible leakage or generation of impurity particles in structure, for example, the cloth bag is clamped on the hole plate by a simple steel ring. This gap has no special forced pressure to close and no design of using sealing glue to seal. These joint parts and the keel for supporting the cloth bag are on the product side after passing through the filter cloth, and it is difficult to avoid leaving or generating impurity particles during manual installation and maintenance. The back blowing to remove the dust layer accumulated on the filter surface is usually carried out on the product side. These structures and activities may become potential sources of impurity particles. Therefore, although it can meet the general atmospheric emission standard, it is difficult to meet the higher product quality standard if used for other high-end product manufacturing. Moreover, the device of the prior art is designed to be used in a fixed manner and cannot be changed to another use manner. SUMMARY

[0004] The present application provides a gas precision filtration and dust removal device.

[0005] The present application adopts the following technical scheme: a gas precision filtration and dust removal device, comprising a first cabinet, a second cabinet installed above the first cabinet and communicating with the first cabinet, and a hole plate layer installed between the first cabinet and the second cabinet, wherein the hole plate layer is independent of but connected to the first cabinet and the second cabinet, the hole plate layer is provided with an opening, and the raw material side of the opening is connected with a short connecting pipe, the short connecting pipe is installed with a filter bag, the first cabinet is provided with a support rod and a support frame extending into the second cabinet and supporting the filter bag, the support rod is a pipe body and is provided with a plurality of openings, the openings are communicated to a gas pressure pipe communicating with a positive pressure source or a negative pressure source through one end of the support rod pipe body, and the first cabinet and the second cabinet are respectively provided with at least one gas inlet and outlet.

[0006] As a further improvement of the above-mentioned scheme, the first cabinet is provided with a first opening and a second opening on one side and the bottom, respectively.

[0007] As a further improvement of the above-mentioned scheme, the second cabinet is provided with a first vent and a second vent on the top and one side, respectively.

[0008] As a further improvement of the above-mentioned scheme, the bag body and the bag opening of the filter bag are located on both sides of the short connecting pipe, the bag opening of the filter bag is exposed from the short connecting pipe and is tightly and seamlessly connected to the short connecting pipe, and the bag body of the filter bag is located in the second cabinet.

[0009] As a further improvement of the above-mentioned scheme, the filter bag is provided with a keel for controlling the degree of collapse of the filter bag when the filter bag is sucked back under negative pressure.

[0010] Compared with the prior art, the present application has the following advantages:

[0011] 1. The device is Figure 1 When the structure is running, the fixing and back suction of the cloth bag are performed on the raw material side, and the product side of the other side of the filter cloth does not have any structure or operation that requires manual operation, thereby avoiding the possibility of impurity particles being generated or contaminating the product to the greatest extent.

[0012] 2. The device is Figure 1 When the structure is running, the clearing process can use short-time negative pressure to make the filter bag collapse significantly, and after the negative pressure is cut off, the normal working airflow will make the filter bag inflate again. The significant change in the shape of the filter bag will produce a significant clearing effect.

[0013] 3. The present application can be simply changed in assembly according to the changed situation, that is, the first cabinet and the second cabinet are transposed and flipped, the three are connected, and the filter bag is installed and changed accordingly, so that the structure of the present application can be changed from the structure of the present application (structure Figure 1 ) to the usual use mode of the prior art (structure Figure 2 ), and thus has wider adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of embodiment 1 of the present application;

[0015] Figure 2 is a structural schematic view of embodiment 2 of the present application.

[0016] MAIN SYMBOL EXPLANATION:

[0017] 1. First cabinet; 11. First opening; 12. Second opening; 2. Second cabinet; 21. First vent; 22. Second vent; 3. Perforated plate layer; 4. Air pressure pipe; 5. Short connecting pipe; 6. Filter bag; 7. Support rod. DETAILED DESCRIPTION

[0018] The application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments described below or technical features between the embodiments can be combined to form new embodiments without conflict.

[0019] The gas precision filtering and dust removing device of the embodiment comprises a first cabinet 1, a second cabinet 2 installed above the first cabinet 1 and communicating with the first cabinet 1, and a hole plate layer 3 installed between the first cabinet 1 and the second cabinet 2. The hole plate layer 3 is independent of but connected to the first cabinet 1 and the second cabinet 2. The hole plate layer 3 is provided with an opening, and a short connecting pipe 5 is connected to the opening. The short connecting pipe 5 is provided with a filter bag 6. The first cabinet 1 is provided with a support rod 7 and a support frame extending into the second cabinet 2 and supporting the filter bag 6. The support rod 7 is a pipe body and is provided with a plurality of openings. The openings communicate with a gas pressure pipe 4 connected to a positive pressure source or a negative pressure source through one end of the support rod 7. The first cabinet 1 and the second cabinet 2 are respectively provided with at least one gas inlet and outlet.

[0020] The first cabinet 1 is respectively provided with a first opening 11 and a second opening 12 on one side and the bottom.

[0021] The second cabinet 2 is respectively provided with a first air vent 21 and a second air vent 22 on the top and one side.

[0022] The bag body and the bag opening of the filter bag 6 are respectively on both sides of the short connecting pipe 5. The bag opening of the filter bag 6 protrudes from the short connecting pipe 5 and is tightly and seamlessly connected to the short connecting pipe 5. The bag body of the filter bag 6 is located in the second cabinet 2.

[0023] The filter bag 6 is provided with a keel for controlling the collapse degree of the filter bag under negative pressure backflow.

[0024] Embodiment 1: Please combine Figure 1 The implementation principle of the gas precision filtering and dust removing device in the embodiment is as follows. The gas containing dust enters the first cabinet 1 through the first opening 11 (or the second opening 12), enters the filter bag 6, and passes through the filter cloth to enter the second cabinet 2. The dust and impurities are filtered by the filter bag 6. The filtered gas is discharged to the downstream equipment through the first air vent 21 (or the second air vent 22) of the second cabinet 2. When the filter bag 6 accumulates more dust, the gas pressure pipe 4 connected to the negative pressure source is opened. The filter bag 6 instantaneously generates negative pressure. The bag wall is retracted, and the bag wall airflow reverses and flows back, so that the dust and impurities are separated from the filter bag 6, fall down or are partially sucked away. The falling dust can fall into the receiving device through the second opening 12 of the first cabinet 1. The filter bag 6 can also be provided with a keel made according to a set size, so that the degree of bag wall retraction can be controlled, and a better unblocking effect can be obtained.

[0025] Embodiment 2: Please combine Figure 2The implementation principle of the gas precision filtering and dust removing device in the embodiment of the application is as follows: after the gas containing dust enters the second vent 22 (or the first vent 21) of the second cabinet 2, the gas passes through the filter bag 6 to enter the first cabinet 1, the dust impurities are filtered out by the filter bag 6, and the filtered gas is discharged to downstream equipment through the first opening 11 (or the second opening 12) of the first cabinet 1; when more dust accumulates on the filter bag 6, the air pressure pipe 4 connected to the positive pressure source is opened, a positive pressure is generated in the filter bag 6 instantaneously, the bag wall expands and the airflow reverses to flow out, so that the dust impurities on the outer wall of the bag are separated from the cloth bag and fall down, and the accumulated dust can fall down into the receiving device through the first vent 21 of the second cabinet 2.

[0026] The above-described embodiments are only preferred embodiments of the application, and cannot be used to limit the protection scope of the application. Any non-essential changes and replacements made by those skilled in the art on the basis of the application all belong to the protection scope of the application.

Claims

1. A gas precision filtering and dust removing device, comprising a first cabinet (1), a second cabinet (2) installed above the first cabinet (1) and communicating with the first cabinet (1), and a hole plate layer (3) installed between the first cabinet (1) and the second cabinet (2), characterized in that: The orifice plate layer (3) is independent of but connected to the first cabinet (1) and the second cabinet (2), the orifice plate layer (3) is provided with an opening, and the raw material side of the opening is connected with a short connecting pipe (5), the short connecting pipe (5) is installed with a filter bag (6); The first cabinet (1) is provided with a support rod (7) and a support frame extending into the second cabinet (2) and supporting the filter bag (6), the support rod (7) is a pipe body and is provided with a plurality of openings, the openings are communicated to the air pressure pipe (4) communicated with the positive pressure source or the negative pressure source through one end of the support rod (7) pipe body, and the first cabinet (1) and the second cabinet (2) are respectively provided with at least one gas inlet and outlet; The first cabinet (1) is provided with a first opening (11) and a second opening (12) on one side and the bottom respectively; The top and one side of the second cabinet (2) are respectively provided with a first air vent (21) and a second air vent (22); The bag body and the bag opening of the filter bag (6) are respectively on both sides of the short connecting pipe (5), the bag opening of the filter bag (6) is out of the short connecting pipe (5) and is tightly and seamlessly connected to the short connecting pipe (5), and the bag body of the filter bag (6) is located in the second cabinet (2); The filter bag (6) is installed with a keel controlling the collapse deformation degree of the filter bag under negative pressure back suction.

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