Dust suction and delivery vehicle dust conveying filter

Abstract

The utility model discloses a dust suction pressure sending vehicle conveys the filter equipment of ash, belongs to dust removal technical field, including filter jar and filter board. Filter jar includes air inlet and air outlet. Filter board sets up in the filter jar inside and is located between air inlet and air outlet filter equipment and is used as the front device of pressure sending vehicle main jar body. Filter board sets up in the filter jar inside, between air inlet and air outlet, make gas enter from air inlet, pass through filter board and then discharge from air outlet. Light sundries are intercepted when the airflow passes through filter board, and the impurity is separated from the gas phase and the dust phase, preventing large size or large volume light sundries from directly entering the rear end ash conveying pipeline and ash unloading equipment, reducing the risk of blockage and jam.

Description

Technical Field

[0001] This utility model belongs to the field of dust removal technology, specifically a dust suction and pressure conveying ash filtration device. Background Technology

[0002] In the steel production process, sintering, ironmaking, and steelmaking processes generate a large amount of dust-laden flue gas. If this gas is directly emitted without effective treatment, it will not only cause serious air pollution but may also cause secondary pollution to soil and water bodies, thereby endangering the surrounding ecological environment and the health of workers. Therefore, steel companies generally install high-efficiency dust removal systems in each process, using electrostatic precipitators, bag filters, and other methods to purify the flue gas and recover a large amount of dust.

[0003] The dust collected by the dust collector has a high iron content and can usually be reused as a secondary raw material in the sintering process to reduce raw material consumption and achieve resource recycling. In the existing technology, steel plants mostly use dust suction and pressure conveyor vehicles to centrally transport the dust collected from each dust collection point, and then send it into the sintering raw material silo by pneumatic conveying, thereby reducing secondary dust emissions during transportation.

[0004] However, in actual operation, dust collectors often mix in various lightweight debris, such as rags, plastic film, and packaging paper scraps, while adsorbing dust from flue gas. These lightweight debris, after entering the dust suction and conveying vehicle along with the dust, are easily drawn into the airflow and accumulate at bends or constrictions in the ash conveying pipeline during pneumatic transport, causing blockages. Furthermore, debris may also enter the ash discharge valve, rotary feeder, and other equipment, causing jamming, accelerated wear, or direct damage, leading to frequent shutdowns and maintenance of the ash discharge equipment, severely affecting the continuous recovery of dust and the stable supply of sintering raw materials.

[0005] Patent CN219447939U discloses an integrated suction and pressure conveying vehicle. An inner end cap divides the tank into a filter chamber and a material chamber. The inner end cap has vents connecting the filter chamber and the material chamber. A filter mechanism filters the material, and a discharge pipe passes through the inner end cap for discharge. However, the inner end cap of this pressure conveying vehicle only provides physical isolation and cannot block lightweight impurities. After filtration by the filter mechanism, dust and lightweight impurities remain in the same tank space, and the discharge pipe simultaneously carries both dust and impurities out. Utility Model Content

[0006] The purpose of this invention is to provide a dust suction and pressing vehicle ash conveying and filtering device to solve the problems mentioned in the prior art.

[0007] A dust suction and conveying ash filter device for a dust collection and compression vehicle is provided, comprising: A filter canister, which includes an air inlet and an air outlet; The filter plate is installed inside the filter tank and located between the air inlet and the air outlet.

[0008] As a further embodiment of this utility model, it also includes an air supply component, which is connected to the air outlet.

[0009] The air supply component injects compressed air or supplemental air into the area connected to the air outlet, changing the local flow field and pressure distribution near the air outlet, enhancing the negative pressure effect in the air outlet area, thereby increasing the attraction of the air outlet to the dust in the air inlet, and promoting the separation of dust from the filter plate.

[0010] As a further embodiment of this invention, the air supply component can swing relative to the air outlet.

[0011] The air supply component is oscillating, allowing for adjustable spray direction. By adjusting the angle, the air supply component can be used for continuous air supply to enhance suction, or switched to a backflushing direction to remove debris from the filter plate surface. This achieves a dual function: on one hand, it stabilizes the negative pressure at the air outlet to draw in dust, and on the other hand, it can perform backflushing to remove debris adhering to the filter plate.

[0012] As a further embodiment of this utility model: a dust cover is provided between the air replenishment component and the side wall of the air outlet.

[0013] When the air supply component has a swing structure, the dust cover is used to prevent dust from entering the gap between the air supply component and the air outlet, thus avoiding wear and blockage.

[0014] As a further embodiment of this utility model: a Venturi tube is formed on the upper part of the air outlet near the filter plate, and a backflush tube is formed on the lower part of the air outlet near the filter plate.

[0015] A venturi tube is installed at the upper part of the air outlet near the filter plate to accelerate the local airflow and create negative pressure, which further promotes the dust to pass through the filter plate; a backflushing tube is installed at the lower part, which can be used to guide the injection of reverse airflow and push the debris accumulated at the bottom of the filter plate away.

[0016] As a further embodiment of this utility model: the filter plate is located in the area connected to the Venturi tube, forming an angle α with the horizontal plane, and the angle α is 70°-95°.

[0017] The inclined arrangement of the filter plates allows gravity and airflow to work together on the trapped material. Dust passes through the filter plates under the action of airflow, while large-volume debris is more likely to fall to the bottom under the action of gravity after being intercepted by the filter plates, thus maintaining the ventilation effect of the filter plates.

[0018] As a further embodiment of this utility model: the filter plate is located in the area connected to the venturi tube, forming an angle α with the horizontal plane, and the angle α is 80°-90°.

[0019] As a further embodiment of this utility model: the air replenishment component includes an air replenishment pipe and a valve connected in sequence, and the valve is externally connected to an air compressor.

[0020] The air compressor provides the air source, the valve controls the switch or pulse, and the air supply pipe delivers the airflow to the air outlet area to achieve air supply control. The valve can prevent dust from entering the air compressor in the reverse direction.

[0021] As a further embodiment of this utility model: the air inlet and the air outlet are connected by a flange, and the filter plate is clamped between the flanges of the air inlet and the air outlet.

[0022] This structure allows the filter plate to become a removable, sealed partition, facilitating quick replacement or cleaning of the filter plate.

[0023] As a further embodiment of this utility model: the side wall of the air inlet is provided with an inspection port, and the inspection port is provided with a gate valve.

[0024] During maintenance, the slide gate valve can be opened to access the maintenance port for manual cleaning or removal of blockages.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: The filtration device serves as a pre-installed component in the main tank of the pressurized conveyor. Filter plates are placed inside the filter tank, between the air inlet and outlet, allowing gas to enter through the inlet, pass through the filter plates, and exit through the outlet. Lightweight impurities are trapped as the airflow passes through the filter plates, separating impurities from the gas and dust phases. This prevents large or bulky lightweight impurities from directly entering the downstream ash conveying pipeline and unloading equipment, reducing the risk of blockages and jamming. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 One of the overall structural schematic diagrams of the dust suction and conveying ash filter device for a dust extraction and pressing vehicle; Figure 2 The second schematic diagram of the overall structure of the dust suction and conveying ash filter device for the dust extraction and pressing vehicle.

[0028] In the diagram: 1. Filter tank; 11. Air inlet; 12. Air outlet; 13. Inspection port; 14. Slide valve; 2. Filter plate; 3. Air supply assembly; 31. Air supply pipe; 32. Valve; 4. Dust cover; 51. Venturi tube; 52. Backflush pipe. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0030] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0031] However, there may be instances where unnecessary detailed descriptions are omitted. For example, detailed descriptions of well-known matters or repetitive descriptions of essentially the same structures may be omitted. This is to avoid unnecessarily lengthy descriptions and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this application and are not intended to limit the subject matter of the claims.

[0032] Please see Figure 1 As shown in the embodiment of this utility model, a dust suction and pressing vehicle ash conveying and filtering device includes a filter tank 1 and a filter plate 2. The filter tank 1 includes an air inlet 11 and an air outlet 12. The filter plate 2 is disposed inside the filter tank 1 and located between the air inlet 11 and the air outlet 12.

[0033] When the conveyor truck and dust removal system generate suction, or when an external air source introduces dust-laden gas, the gas enters through the inlet 11 and into the filter tank 1. At the inlet 11, a local velocity change typically occurs, establishing a flow field, and the dust-laden gas is guided towards the filter plate 2. As the airflow continues, lightweight impurities accumulate and are trapped on the filter plate surface or in its pores, while dust is allowed to pass through. This serves as a pre-clogging protection for the main tank of the conveyor truck, significantly reducing the risk of clogging and wear in the downstream pipelines and unloading equipment.

[0034] The filtration device also includes an air supply component 3. The air supply component 3 injects compressed air into the area connected to the air outlet 12, thereby generating a high-speed jet stream to enhance the local low static pressure zone near the air outlet 12. The jet stream's entrainment and turbulence increase the airflow from the filter plate 2 to the air outlet 12, thus promoting the shedding of dust from the filter plate 2 and its intake into the air outlet 12, where it enters the main tank or downstream conveying system.

[0035] Specifically, the air supply assembly 3 includes an air supply pipe 31, a valve 32, and an air compressor connected in sequence. The air compressor provides a source of compressed air. The valve 32 can be a normally closed solenoid valve or a fast pulse valve, used for opening, closing, pulsating, or regulating the air supply volume. Alternatively, the valve 32 can be a one-way valve to prevent downstream gas or dust from being drawn back into the air compressor side.

[0036] Please see Figure 2 As shown, the air supply component 3 can swing relative to the air outlet 12. More specifically, the air supply pipe 31 can swing relative to the air outlet 12, flexibly adjusting the local flow field by changing the injection direction. When the injection direction is consistent with the mainstream of the air outlet 12, the negative pressure effect in the air outlet area can be enhanced, improving the suction and separation efficiency of dust after passing through the filter plate 2. When the injection direction is deflected or reversed towards the filter plate 2, it can create an impact or pulse backflushing effect on the plate surface, peeling off the attached light debris and dust, and maintaining the permeability of the filter plate 2. The swinging process of the air supply component 3 realizes the switching between air supply and backflushing functions, avoiding local clogging of the filter plate 2, and improving the overall filtration efficiency and the stability of the device operation.

[0037] In one embodiment, a hinge is provided between the air supply duct 31 and the air outlet 12 to provide rotational freedom. The air supply duct 31 can be rotated by a motor driving its shaft or by a cylinder providing torque to the air supply duct 31, which is not the only possible method.

[0038] Because the air supply component 3 has a swinging function, a gap inevitably exists between it and the side wall of the air outlet 12. Without protection, dust will enter the gap with the airflow or due to gravity, gradually accumulating and forming a blockage, causing the swinging of the air supply component 3 to be obstructed or even jammed. Therefore, a dust cover 4 is provided between the air supply component 3 and the side wall of the air outlet 12. More specifically, a dust cover 4 is provided between the air supply pipe 31 and the side wall of the air outlet 12. The dust cover 4 acts as a barrier, blocking the path for dust to directly enter the gap. The dust cover 4 can be a bellows-type structure, which will not obstruct the swinging motion of the air supply pipe 31.

[0039] A Venturi tube 51 is formed at the upper part of the air outlet 12 near the filter plate 2, and a backpressure tube 52 is formed at the lower part of the air outlet 12 near the filter plate 2. The Venturi tube 51 at the upper part of the air outlet 12 accelerates the airflow locally through the narrowing of the flow channel, forming a Venturi effect, accelerating the airflow to generate a local negative pressure zone, and enhancing the attraction of the air outlet 12 to dust near the filter plate 2. Dust is more easily drawn through the filter plate 2 by the airflow, achieving efficient separation, while maintaining the continuity of airflow and preventing excessive accumulation of dust on the surface of the filter plate 2. The backpressure tube 52 at the lower part of the air outlet 12 can guide the injection of reverse airflow, impacting the bottom of the filter plate 2. The reverse airflow can peel off and loosen the light debris or dust fragments accumulated at the bottom of the filter plate 2, and push them away from the filter plate 2 along the airflow direction. This design effectively prevents the long-term accumulation of dust or debris at the bottom from gradually increasing and affecting the filter plate 2 in the area of ​​the Venturi tube 51, maintaining the permeability of the filter plate 2.

[0040] In one specific embodiment, the nozzle of the make-up air duct 31 faces the outlet end of the air outlet 12, and the bottom of the filter plate 2 remains open. Airflow continuously enters through the air inlet 11, and after passing through the filter plate 2, debris is intercepted and gradually accumulates at the bottom of the filter plate 2. At this time, the main flow path of the dust is in the Venturi tube 51 area. When the debris accumulates to the point of affecting the flow rate of the filter plate 2 in the Venturi tube 51 area, the nozzle of the make-up air duct 31 swings towards the backflushing pipe 52. The reverse airflow impacts the accumulated debris through the backflushing pipe 52, pushing the debris towards the inlet direction of the air inlet 11, thus maintaining the openness of the filter plate 2 in the Venturi tube 51 area.

[0041] Furthermore, the filter plate 2, located in the area connected to the Venturi tube 51, forms an angle α with the horizontal plane, with α ranging from 70° to 95°. This angle of inclination between the filter plate 2 and the horizontal plane causes dust and large-volume debris to experience different forces under airflow. Light dust can easily pass through the filter plate 2 and enter the air outlet 12 under the pull of the airflow, while large-volume, lightweight debris is trapped by the filter plate 2. Due to the inclination of the plate surface, the trapped debris is more easily overcome by gravity, sliding down the plate surface to the bottom of the filter tank 1, preventing long-term accumulation. This inclination range ensures, on the one hand, that the friction and electrostatic adsorption between the debris and the surface of the filter plate 2 are eliminated, and on the other hand, avoids an excessively large inclination angle that would increase the dust retention rate on the filter plate 2, affecting the dust flow effect.

[0042] Furthermore, the filter plate 2 is located in the area connected to the venturi tube 51, forming an angle α with the horizontal plane, and the angle α is 80°-90°. This range further optimizes the distribution structure of the filter plate 2, enhances the removal of debris on the filter plate 2, and avoids the overall length of the filter device from increasing due to excessive tilting of the filter plate 2, resulting in excessive redundant length of the filter device and affecting the overall layout of the press truck.

[0043] The filter plate 2 is clamped between the flanges of the air inlet 11 and the air outlet 12, forming a physical partition inside the filter tank 1. The flange connection structure can be disassembled and assembled using bolts or quick clips, facilitating quick replacement or cleaning of the filter plate 2 by operators. Clamped between the flanges, the filter plate 2 can withstand the impact of airflow and some mechanical stress, preventing displacement or deformation due to air pressure or dust accumulation. The clamping structure, together with the sealing gasket, prevents air and dust leakage, ensuring stable filtration efficiency and negative pressure suction.

[0044] An inspection port 13 is provided on the side wall of the air inlet 11, and a gate valve 14 is installed in the inspection port 13. By providing the inspection port 13 on the side wall of the air inlet 11, operators can directly access the filter plate 2 and the pipe inlet area when necessary. After opening the gate valve 14, accumulated dust, light debris, or blockages can be manually cleaned or removed to quickly restore the system's smooth operation.

[0045] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A dust suction and conveying ash filter device for a dust extraction and pressing vehicle, characterized in that, include: The filter canister (1) includes an air inlet (11) and an air outlet (12); The filter plate (2) is disposed inside the filter tank (1) and located between the air inlet (11) and the air outlet (12).

2. The dust suction and conveying ash filtering device for a dust extraction and pressing vehicle according to claim 1, characterized in that, It also includes an air supply component (3), which is connected to the air outlet (12).

3. The dust suction and pressing ash conveying and filtering device according to claim 2, characterized in that, The air supply component (3) can swing relative to the air outlet (12).

4. The dust suction and pressing conveying ash filtering device according to claim 3, characterized in that, A dust cover (4) is provided between the air supply component (3) and the side wall of the air outlet (12).

5. The dust suction and pressing conveying ash filtering device according to claim 3, characterized in that, A Venturi tube (51) is formed on the upper part of the air outlet (12) near the filter plate (2), and a backflush tube (52) is formed on the lower part of the air outlet (12) near the filter plate (2).

6. The dust suction and conveying ash filter device for a dust extraction and pressing vehicle according to claim 5, characterized in that, The filter plate (2) is located in the area connected to the venturi tube (51) and forms an angle α with the horizontal plane, and the angle α is 70°-95°.

7. The dust suction and conveying ash filter device for a dust extraction and pressing vehicle according to claim 6, characterized in that, The filter plate (2) is located in the area connected to the venturi tube (51) and forms an angle α with the horizontal plane, and the angle α is 80°-90°.

8. The dust suction and pressing conveying ash filtering device according to claim 2, characterized in that, The air supply component (3) includes an air supply pipe (31) and a valve (32) connected in sequence, and the valve (32) is connected to an external air compressor.

9. The dust suction and conveying ash filter device according to claim 1, characterized in that, The air inlet (11) and the air outlet (12) are connected by a flange, and the filter plate (2) is sandwiched between the flanges of the air inlet (11) and the air outlet (12).

10. A dust suction and conveying ash filtering device for a dust extraction and pressing vehicle according to claim 1, characterized in that, The side wall of the air inlet (11) is provided with an inspection port (13), and the inspection port (13) is provided with a slide valve (14).

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