Dedusting and filtering device for exhaust gas of sending tank and use method of dedusting and filtering device

Abstract

The invention discloses a dedusting and filtering device for exhaust gas of a sending tank and a use method of the dedusting and filtering device. The dedusting and filtering device comprises a filtering part and a control part, the filtering part is arranged on one side of the sending tank body; the control part is arranged on one side of the filtering part; the filtering part is additionally arranged at the front end of the control part, so that gas in the sending tank body enters the control part after being subjected to multi-layer filtering in the filtering part to complete exhaust operation, large-particle impurities can be filtered out, the gas flow speed is reduced, abrasion is relieved, and the service life of the sending tank is prolonged. The service life of the sending tank is effectively prolonged; the maintenance cost is reduced; besides, the control component controls the gas to enter the sending tank body from the filtering component, the automatic cleaning function of the filtering component can be achieved, and therefore the requirements for procedures or manual intervention are reduced, the operation process is simplified, the cost is reduced, sending tank operation interruption caused by cleaning is avoided, and the working efficiency is further improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of dust removal of a sending tank, and more specifically, relates to a dust removal and filtering device for exhaust gas of a sending tank and a use method thereof. Background Art

[0002] A delivery tank is a container used to store and transport materials, commonly found in industrial production, logistics, warehousing and other fields. It is usually used in conjunction with a pneumatic conveying system to transport materials from the delivery tank to other equipment or locations through compressed air or other gases. When the delivery tank has completed the delivery of materials to the sand tower or other equipment, the dust needs to be evacuated so that the materials can fall freely into the delivery tank, and rapid exhaust is required at this time.

[0003] At present, most of the methods used in the industry are ball valves or butterfly valves for exhausting the tank body. Generally, the device is fixed on the tank body, and the valve body is connected to the tank body by means of threads or flanges. For example, the Chinese patent with document number CN202036878U discloses a sending tank inclined expansion type quick discharge filter, which includes: the quick discharge filter is arranged on the exhaust port of the sending tank through a butterfly valve; the exhaust port is arranged on the inclined side wall of the upper end of the sending tank; the quick discharge filter includes: a small diameter straight pipe section at the bottom, a trumpet pipe end connected to the upper end of the small diameter straight pipe section, a large diameter straight pipe section connected to the trumpet pipe end, a steel support connected to the upper end of the large diameter straight pipe section, and a filter bag arranged on the steel support. This patent can utilize the lateral space to speed up the discharge of the gas in the sending tank, but there is a problem that the exhaust gas directly enters the sending tank workshop.

[0004] The Chinese patent with the document number CN215287074U discloses an exhaust pipe structure of a pneumatic conveying sending tank, including a tank body and an exhaust port disposed on one side of the tank body, the exhaust port of the tank body is connected to a filter exhaust pipe, the tank body is located at the exhaust port and is inclined outwardly and integrally extended with a connecting pipe body, the connecting pipe body is threadedly connected to the filter exhaust pipe, and the filter exhaust pipe has a detachable filter screen inside, and the material is filtered by the filter screen and falls into the tank body along the inner wall of the connecting pipe body when the gas is discharged to the exhaust port. The patent effectively solves the problem of exhaust gas directly entering the sending tank workshop through the filter exhaust pipe, and effectively filters and intercepts material particles in the gas during exhaust, avoiding waste of materials while ensuring the smoothness of exhaust. However, the above two patents still fail to solve the following problems: (1) The filter bags need to be replaced regularly, and replacing the filter bags during busy operations may cause the operation to stagnate, affecting the operation efficiency; (2) Insufficient sealing between the filter bag and the filter chamber may cause leakage of unfiltered gas, affecting the overall filtering effect; (3) When processing abrasive or sticky materials, such as sand and gravel, the filter bag needs to be replaced more frequently, increasing the complexity and cost of the operation. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a dust removal and filtering device for the exhaust of a sending tank and a method of using the same, wherein the filter component is added at the front end of the control component, so that the control component is connected to the interior of the sending tank body through the filter component, so that the gas in the sending tank body enters the control component after passing through the multi-layer filtration in the filter component, thereby completing the exhaust operation, thereby helping to filter out large particle impurities, reduce the gas flow rate, prevent most of the particles from directly impacting the control component and its related pipelines, reduce wear, effectively extend the service life of the sending tank and reduce maintenance costs; in addition, by controlling the gas to enter the sending tank body from the filter component through the control component, the automatic cleaning function of the filter component can be realized, thereby reducing the need for procedures or manual intervention, simplifying the operating process and reducing costs, avoiding interruptions to the sending tank operation due to cleaning, and further improving work efficiency.

[0006] In order to achieve the above-mentioned object, the present invention provides a dust removal and filtering device for exhaust gas from a sending tank, comprising: a filtering component and a control component, wherein:

[0007] The filter component comprises: a connecting pipe, a shell, a cover plate, a perforated plate, a filter chain and a vent; the connecting pipe is arranged at one side of the sending tank body and communicates with the inside of the sending tank body; the shell is detachably connected to the connecting pipe; the cover plate is arranged at the upper end of the shell by connecting bolts; the perforated plate is arranged inside the shell; the filter chain is arranged at the bottom end of the cover plate and falls into the shell; the filter chain is arranged above the perforated plate; the vent is arranged on the side wall of the shell and close to the cover plate;

[0008] The control component comprises: an exhaust control valve, an exhaust pipe, an intake control valve and an intake pipe; the exhaust control valve and the intake control valve are detachably connected to the vent through a three-way pipe fitting; one end of the exhaust pipe is connected to the exhaust control valve; one end of the intake pipe is connected to the intake control valve;

[0009] By adding the filter component at the front end of the control component, the gas in the sending tank body enters the control component after passing through the filter component, thereby reducing the gas flow rate and alleviating wear; at the same time, by controlling the gas to enter the sending tank body from the filter component through the control component, the automatic cleaning function of the filter component can be realized, reducing the need for program or manual intervention.

[0010] Furthermore, the filter component and the control component adopt a modular and detachable design.

[0011] Furthermore, the connecting pipe is arranged at the upper end of the sending tank body, or is arranged at the side wall of the sending tank body at a certain upward inclined angle.

[0012] Furthermore, the housing comprises: a matching section and a filtering section, wherein:

[0013] The matching section is detachably connected to the connecting pipe; the filtering section is fixedly connected to the matching section;

[0014] The outer diameter and inner diameter of the matching section are both smaller than the outer diameter and inner diameter of the filtering section, and the wall thickness of the filtering section is greater than the wall thickness of the matching section;

[0015] An annular connection platform for mounting the perforated plate is provided at the internal connection between the matching section and the filtering section;

[0016] A curved chamfer is provided at the connection between the matching section and the outer surface of the filtering section.

[0017] Furthermore, the thickness of the cover plate is not less than the wall thickness of the filter section; a sealing gasket is provided between the shell and the cover plate, and a groove adapted to the sealing gasket is provided at the upper end of the shell.

[0018] Furthermore, the aperture range of the perforated plate is 0.5-1 mm, and the opening rate is 45%-65%; the hole type of the perforated plate includes round holes.

[0019] Furthermore, the filter chain is detachably connected to the cover plate through a groove provided at the bottom end of the cover plate;

[0020] The number of the filter chains is at least four;

[0021] The filter chain has at least three chain links;

[0022] At least one annular filter element is arranged between a plurality of the filter chains.

[0023] Furthermore, a metal filter is provided in the vent.

[0024] Furthermore, the exhaust control valve and the intake control valve are intelligent valves;

[0025] The exhaust pipe and the air intake pipe are flexible pipes.

[0026] Another aspect of the present invention provides a method for using a dust removal and filtering device for exhaust gas from a sending tank, which is implemented by using the dust removal and filtering device as described above, and comprises the following steps:

[0027] S1: According to the tank structure of the sending tank, and the exhaust and intake requirements, select the dust removal and filtering device of appropriate size, and verify that it works properly;

[0028] S2: Connect the connecting pipe to the sending tank body by welding. After the welding is stable, spray anti-corrosion paint on the connection;

[0029] S3: installing a cover plate on the upper end of the shell by connecting bolts, and then connecting the shell to the connecting pipe;

[0030] S4: Connect the vent, the exhaust control valve and the intake control valve through a three-way pipe fitting, and connect the exhaust pipe and the intake pipe to appropriate positions respectively. After checking the air tightness, the installation of the dust removal and filtering device is completed;

[0031] S5: When the material is being transported, the exhaust control valve is closed and the intake control valve is opened; after the material is transported, the intake control valve is closed and the exhaust control valve is opened to perform exhaust operation; thereafter, the next operation cycle is entered.

[0032] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0033] 1. The dust removal and filtering device of the present invention, by adding the filter component at the front end of the control component, makes the control component communicate with the inside of the sending tank body through the filter component, so that the gas in the sending tank body enters the control component after passing through the multi-layer filtration in the filter component, and completes the exhaust operation, thereby helping to filter out large particles of impurities, reduce the gas flow rate, prevent most of the particles from directly impacting the control component and its related pipelines, reduce wear, effectively extend the service life of the sending tank and reduce maintenance costs; in addition, by controlling the gas to enter the sending tank body from the filter component through the control component, the automatic cleaning function of the filter component can be realized, thereby reducing the need for procedures or manual intervention, simplifying the operation process and reducing costs, avoiding interruptions in the sending tank operation due to cleaning, and further improving work efficiency.

[0034] 2. The dust removal and filtering device of the present invention enables the vent to have both exhaust and intake functions by detachably connecting the exhaust control valve and the intake control valve to the vent via a three-way pipe fitting. The structure is simple and easy to maintain.

[0035] 3. The dust removal and filtering device of the present invention adopts a modular and detachable design for the filtering component and the control component, so that it can adapt to tanks of different specifications, reduce the production cost of parts and components, and facilitate maintenance and upgrading.

[0036] 4. The dust removal and filtering device of the present invention improves the flexibility of the device and facilitates installation and maintenance by configuring the exhaust pipe and the air inlet pipe as hoses.

[0037] 5. The dust removal and filtering device of the present invention, by increasing the thickness of the cover plate and the wall thickness of the filtering section, can adapt to the violent collision between impurities in the filtering section and / or between impurities and components for filtering impurities, thereby ensuring the stability and safety of the structure of the dust removal and filtering device.

[0038] 6. The dust removal and filtering device of the present invention, by arranging the connecting pipe at the upper end of the sending tank body, or arranging it at a certain upward inclined angle on the side wall of the sending tank body, allows the material that may be discharged into the connecting pipe to fall back into the sending tank body by gravity. At the same time, the adaptability to different types of sending tanks and sending tank workshops is improved, and the practicality of the dust removal and filtering device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic structural diagram of a dust removal and filtering device according to an embodiment of the present invention;

[0040] Figure 2 It is a structural schematic diagram of a filter component according to an embodiment of the present invention;

[0041] Figure 3 The present invention is a schematic diagram of the steps of using the dust removal and filtering device according to the embodiment of the present invention.

[0042] In all the drawings, the same figure marks represent the same technical features, specifically: 1-sending tank body, 2-connecting pipe, 3-shell, 31-matching section, 311-annular connecting platform, 32-filter section, 4-cover plate, 41-sealing gasket, 5-punching plate, 6-filter chain, 61-annular filter element, 7-vent, 8-exhaust control valve, 9-exhaust pipe, 10-intake control valve, 11-intake pipe. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides a dust removal and filtering device for exhaust of a sending tank, comprising: a filtering component and a control component; the filtering component is arranged on one side of a sending tank body 1; the control component is arranged on one side of the filtering component; in the actual working process of the sending tank, by adding the filtering component at the front end of the control component, the control component is connected with the inside of the sending tank body 1 through the filtering component, so that the gas in the sending tank body 1 enters the controlling component after passing through the multi-layer filtering in the filtering component, and the exhaust operation is completed, thereby helping to filter out large particle impurities, reduce the gas flow rate, prevent most of the particles from directly impacting the controlling component and its related pipelines, reduce wear, effectively extend the service life of the sending tank and reduce maintenance costs; in addition, by controlling the gas to enter the sending tank body 1 from the filtering component through the control component, the automatic cleaning function of the filtering component can be realized, thereby reducing the need for procedures or manual intervention, simplifying the operation process and reducing costs, avoiding interruptions in the sending tank operation caused by cleaning, and further improving work efficiency.

[0045] Specifically, Figure 2 As shown, the filter component is arranged on one side of the sending tank body 1, and is used to remove dust and filter the exhaust gas to reduce the wear of the control component and related pipelines; the filter component includes: a connecting pipe 2, a shell 3, a cover plate 4, a punching plate 5, a filter chain 6 and a vent 7.

[0046] The connecting pipe 2 is arranged at one side of the sending tank body 1 and is communicated with the interior of the sending tank body 1 to ensure smooth exhaust or intake.

[0047] Preferably, the connecting pipe 2 is arranged at the upper end of the sending tank body 1, or is arranged at the side wall of the sending tank body 1 at a certain upward inclination angle, so as to use gravity to return the materials that may be discharged into the connecting pipe 2 to the sending tank body 1, and at the same time, improve the adaptability to different types of sending tanks and sending tank workshops, and improve the practicality of the dust removal and filtering device.

[0048] Preferably, the connecting pipe 2 is connected to the sending tank body 1 by welding, and the connection is sprayed with anti-corrosion paint to ensure the stability of the dust removal and filtering device and the safety of the sending tank structure.

[0049] Preferably, the inner side of the connecting pipe 2 is provided with an internal thread.

[0050] The housing 3 is detachably connected to the connecting pipe 2 to support other components. The housing 3 includes a matching section 31 and a filtering section 32 .

[0051] The matching section 31 is detachably connected to the connecting pipe 2 .

[0052] Preferably, an external thread structure adapted to the connecting pipe 2 is provided on the outer side of the matching section 31 to facilitate the inspection and maintenance of the filter component and ensure the air tightness of the connection.

[0053] The filtering section 32 is fixedly connected to the matching section 31 to stably accommodate the filtered impurities and the components for filtering the impurities.

[0054] Preferably, the outer diameter and inner diameter of the matching section 31 are smaller than the outer diameter and inner diameter of the filtering section 32, and the wall thickness of the filtering section 32 is greater than the wall thickness of the matching section 31, so as to adapt to the violent collision between impurities in the filtering section 32 and / or between impurities and components for filtering impurities, thereby ensuring the stability and safety of the dust removal and filtering device structure.

[0055] Preferably, an annular connecting platform 311 for mounting the perforated plate 5 is provided at the internal connection between the matching section 31 and the filtering section 32 .

[0056] Preferably, a curved chamfer is provided at the connection between the outer surface of the matching section 31 and the filtering section 32 to disperse local stress, reduce the risk of fatigue damage of components due to stress concentration, and avoid harm to the human body caused by sharp edges during disassembly.

[0057] The cover plate 4 is arranged on the upper end of the shell 3 through connecting bolts, and is used to close the upper end of the shell 3.

[0058] Preferably, the thickness of the cover plate 4 is not less than the wall thickness of the filter section 32, so as to adapt to the violent collision between impurities in the filter section 32 and / or between impurities and components for filtering impurities, thereby ensuring the stability and safety of the dust removal and filtering device structure.

[0059] Preferably, a sealing gasket 41 is provided between the shell 3 and the cover plate 4, and a groove adapted to the sealing gasket 41 is provided at the upper end of the shell 3 to further enhance the air tightness of the filter component.

[0060] The punching plate 5 is arranged inside the housing 3 .

[0061] Preferably, the punching plate 5 is detachably arranged at the upper end of the annular connecting platform 311, and is used to separate and divide the interior of the shell 3 into two parts according to the connection between the matching section 31 and the filtering section 32, and is used to act as the first filtering layer. At the same time, the residual material can fall back into the interior of the sending tank body 1.

[0062] Preferably, the aperture range of the punching plate 5 is 0.5-1 mm, and the opening rate is 45%-65%, which is used to reduce the gas velocity during exhaust, reduce the impact on the control device and related pipelines, and reduce the wear rate while satisfying the filtering conditions.

[0063] Preferably, the hole pattern of the punching plate 5 includes round holes.

[0064] The filter chain 6 is arranged at the bottom end of the cover plate 4 and falls into the interior of the shell 3 to serve as a second filter layer.

[0065] Preferably, the filter chain 6 is arranged above the perforated plate 5 .

[0066] Preferably, the filter chain 6 is detachably connected to the cover plate 4 through a groove provided at the bottom end of the cover plate 4 .

[0067] Preferably, there are at least four filter chains 6 , and the filter chain 6 has at least three chain rings, so as to further enhance the effect of filtering impurities.

[0068] Preferably, at least one annular filter element 61 is provided between the plurality of filter chains 6 to further enhance the filtering capacity of the plurality of filter chains 6 .

[0069] The vent 7 is disposed on the side wall of the housing 3 and close to the cover plate 4, and is used to allow the filter chain 6 to fully contact the airflow to be filtered to ensure smooth exhaust or intake.

[0070] In an optional embodiment, a metal filter is provided in the vent 7 to serve as a third filter layer to further improve the filtering effect.

[0071] Specifically, Figure 1 and Figure 2 As shown, the control component is arranged on one side of the filter component, and is used to regulate the exhaust or intake of the sending tank; the control component includes: an exhaust control valve 8, an exhaust pipe 9, an intake control valve 10 and an intake pipe 11.

[0072] The exhaust control valve 8 and the intake control valve 10 are detachably connected to the vent 7 via a three-way pipe fitting, so that the vent 7 can have both exhaust and intake functions. The structure is simple and easy to maintain.

[0073] Preferably, the exhaust control valve 8 and the intake control valve 10 are intelligent valves for receiving signals, realizing remote control, and simplifying exhaust and intake operations.

[0074] One end of the exhaust pipe 9 is connected to the exhaust control valve 8, and the other end thereof is connected to other devices for further processing the exhaust gas to reduce pollution.

[0075] One end of the air intake pipe 11 is connected to the air intake control valve 10 , and the other end thereof is connected to a compressed air supply device to ensure the stability and safety of air transmission.

[0076] Preferably, the filter component and the control component adopt a modular detachable design to reduce the production cost of parts and components and facilitate maintenance and upgrading.

[0077] Preferably, the exhaust pipe 9 and the air inlet pipe 11 are hoses, which are used to improve the flexibility of the device and facilitate installation and maintenance.

[0078] like Figure 3 As shown, another embodiment of the present invention provides a method for using a dust removal and filtering device for exhaust gas from a sending tank, comprising the following steps:

[0079] S1: According to the structure of the sending tank body 1 and the exhaust and intake requirements, select the dust removal and filtering device of appropriate size and check whether it works properly;

[0080] S2: Connect the connecting pipe 2 to the sending tank body 1 by welding, and after the welding is stable, spray anti-corrosion paint on the connection;

[0081] S3: The cover plate 4 is arranged on the upper end of the housing 3 by connecting bolts, and then the housing 3 is connected to the connecting pipe 2;

[0082] S4: Connect the vent 7, the exhaust control valve 8 and the intake control valve 10 through a three-way pipe fitting, and connect the exhaust pipe 9 and the intake pipe 11 to appropriate positions respectively. After checking the air tightness, the installation of the dust removal and filtering device is completed;

[0083] S5: When the material is being transported, the exhaust control valve 8 is closed and the intake control valve 10 is opened; after the material is transported, the intake control valve 10 is closed and the exhaust control valve 8 is opened to perform exhaust operation; thereafter, the next operation cycle is entered.

[0084] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0085] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0086] In this patent, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art will readily understand that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dust removal and filtering device for sending tank exhaust, characterized in that: include: Filter components and control components, including: The filter component comprises: a connecting pipe (2), a shell (3), a cover plate (4), a perforated plate (5), a filter chain (6) and a vent (7); the connecting pipe (2) is arranged on one side of the sending tank body (1) and is in communication with the interior of the sending tank body (1); the shell (3) is detachably connected to the connecting pipe (2); the cover plate (4) is arranged on the upper end of the shell (3) by connecting bolts; the perforated plate (5) is arranged inside the shell (3); the filter chain (6) is arranged at the bottom end of the cover plate (4) and falls into the interior of the shell (3); the filter chain (6) is arranged above the perforated plate (5); the vent (7) is arranged on the side wall of the shell (3) and is close to the cover plate (4); The control component comprises: an exhaust control valve (8), an exhaust pipe (9), an intake control valve (10) and an intake pipe (11); the exhaust control valve (8) and the intake control valve (10) are detachably connected to the vent (7) via a three-way pipe fitting; one end of the exhaust pipe (9) is connected to the exhaust control valve (8); one end of the intake pipe (11) is connected to the intake control valve (10); By adding the filter component at the front end of the control component, the gas in the sending tank body (1) enters the control component after passing through the filter component, thereby reducing the gas flow rate and alleviating wear; at the same time, by controlling the gas to enter the sending tank body (1) from the filter component through the control component, the automatic cleaning function of the filter component can be realized, thereby reducing the need for program or manual intervention.

2. The dust removal and filtering device according to claim 1, characterized in that: The filter component and the control component adopt a modular and detachable design.

3. The dust removal and filtering device according to claim 1, characterized in that: The connecting pipe (2) is arranged at the upper end of the sending tank body (1), or is arranged at the side wall of the sending tank body (1) at a certain upward tilt angle.

4. The dust removal and filtering device according to any one of claims 1 to 3, characterized in that: The housing (3) comprises: a matching section (31) and a filtering section (32), wherein: The matching section (31) is detachably connected to the connecting pipe (2); the filtering section (32) is fixedly connected to the matching section (31); The outer diameter and inner diameter of the matching section (31) are both smaller than the outer diameter and inner diameter of the filtering section (32), and the wall thickness of the filtering section (32) is greater than the wall thickness of the matching section (31); An annular connection platform (311) for mounting the perforated plate (5) is provided at the internal connection between the matching section (31) and the filtering section (32); A curved chamfer is provided at the connection point between the outer surface of the matching section (31) and the filtering section (32).

5. The dust removal and filtering device according to claim 4, characterized in that: The thickness of the cover plate (4) is not less than the wall thickness of the filter section (32); a sealing gasket (41) is provided between the shell (3) and the cover plate (4), and a groove adapted to the sealing gasket (41) is provided at the upper end of the shell (3).

6. The dust removal and filtering device according to any one of claims 1 to 3, characterized in that: The hole diameter of the punching plate (5) ranges from 0.5 to 1 mm, and the opening rate is from 45% to 65%; the hole type of the punching plate (5) includes circular holes.

7. The dust removal and filtering device according to any one of claims 1 to 3, characterized in that: The filter chain (6) is detachably connected to the cover plate (4) via a groove provided at the bottom end of the cover plate (4); The number of the filter chains (6) is at least four; The filter chain (6) has at least three chain links; At least one annular filter element (61) is arranged between a plurality of the filter chains (6).

8. The dust removal and filtering device according to any one of claims 1 to 3, characterized in that: A metal filter screen is arranged inside the vent (7).

9. The dust removal and filtering device according to any one of claims 1 to 3, characterized in that: The exhaust control valve (8) and the intake control valve (10) are intelligent valves; The exhaust pipe (9) and the air intake pipe (11) are hoses.

10. A method for using a dust removal and filtering device for exhaust gas from a sending tank, which is implemented by using the dust removal and filtering device as described in any one of claims 1 to 9, characterized in that: The steps include: S1: According to the structure of the sending tank body (1) and the exhaust and intake requirements, select the dust removal and filtering device of appropriate size and check whether it works properly; S2: Connect the connecting pipe (2) to the sending tank body (1) by welding, and after the welding is stable, spray anti-corrosion paint on the connection; S3: The cover plate (4) is arranged on the upper end of the shell (3) by means of connecting bolts, and then the shell (3) is connected to the connecting pipe (2); S4: Connect the vent (7), the exhaust control valve (8) and the intake control valve (10) through a three-way pipe fitting, and connect the exhaust pipe (9) and the intake pipe (11) to appropriate positions respectively. After checking the air tightness, the installation of the dust removal and filtering device is completed; S5: When conveying materials, the exhaust control valve (8) is closed and the intake control valve (10) is opened; after the material conveying is completed, the intake control valve (10) is closed and the exhaust control valve (8) is opened to perform exhaust operation; thereafter, the next operation cycle is entered.

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