Stock bin discharging dust removal system

Abstract

The utility model provides a stock bin unloading dust removal system which comprises a dust collecting device and a bin suction device, the dust collecting device is installed on a movable unloading trolley and used for collecting unloading dust, and the bin suction device is connected with all material grooves of a stock bin and used for keeping the material grooves in a negative pressure state. The dust collecting device comprises a sealing cover and a collecting fan, the movable discharging trolley comprises a trolley body, a belt conveyor and a discharging pipe, the belt conveyor and the discharging pipe are arranged on the trolley body, a discharging opening of the belt conveyor is aligned with an inlet of the discharging pipe, the sealing cover is arranged at the position of the discharging opening of the belt conveyor, and the collecting fan is arranged on the sealing cover. And the trapping fan is used for conveying dust in the sealing cover to a trough corresponding to the discharge pipe. According to the utility model, the dust trapping device is arranged on the movable discharging car, so that dust at dust producing points is effectively trapped during discharging, the trapped dust is directly fed into the material grooves for recycling, and the material grooves are kept in a negative pressure state by the bin suction device, so that dust is prevented from being raised.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal equipment, in particular to a silo unloading dust removal device. Background Art

[0002] At present, the steel, nonferrous metals, chemical, electric power, food processing and other industries all have production processes of silo loading and unloading. In particular, the bulk materials of steel enterprises in raw materials, sintering, blast furnace, steelmaking, coking and other processes are loaded into various silos by belt conveyors and mobile electric unloading vehicles. During loading, due to the large drop of materials and the positive pressure in the silo, the gas containing a large amount of dust escapes from the silo feed port into the air, causing the dust on the trough to seriously exceed the standard and pollute the environment. Taking the blast furnace ore coke trough as an example, it is generally composed of multiple coke silos and multiple ore silos. A large amount of dust will be generated during the unloading process of the unloading device. The dust emission point has the characteristics of high emission position, high smoke concentration and long emission time, resulting in poor working conditions at the top of the ore trough and serious dust spillage to pollute the blast furnace production area.

[0003] At present, the following three dust removal methods are mainly used for silo unloading:

[0004] The first method is to connect with the centralized dust removal station outside the material trough through a pipeline to perform negative pressure exhaust in the material trough. This dust removal method requires a dust hood to be installed on each side of the material trough, and an electric valve to be installed behind each dust hood. The electric valve is interlocked with the mobile unloading vehicle on the trough. When the mobile unloading vehicle unloads at a certain material trough, the corresponding electric valve automatically opens to extract the dust-containing airflow of the material trough to prevent dust from escaping from the discharge port. However, since the valves need to be opened and closed frequently, and the dust in steel enterprises has high hardness, large dust particle size and specific gravity, and the dust has a certain degree of adhesion, the valves often malfunction after running for a period of time and cannot be opened and closed normally. This will cause multiple valves to be opened at the same time, and the air volume that should be concentrated in the controlled trough dust hood will be distributed to other dust hoods. The air volume of the controlled trough dust hood is relatively reduced, and it is impossible to extract all the dust raised during unloading, affecting the dust capture at the unloading point. It will also cause the wind speed of the air duct behind the dust hood to drop sharply, causing dust to settle in the air duct and block the pipeline, causing the system balance to be destroyed and the air cannot be extracted to suppress dust, and the ideal effect cannot be achieved.

[0005] The second method is to arrange ventilation slots overhead above the material holes on the upper edge of the trough. The mobile trolley on the ventilation slot is connected to the air duct on the mobile unloading vehicle. The mobile unloading vehicle will drive the mobile trolley on the ventilation slot to move. The ventilation slot is connected to the centralized dust removal station outside the trough through the pipeline. This method is difficult to seal the mobile exhaust port, the ventilation slot is arranged overhead, and the distance between the exhaust port and the unloading point is far, so the dust removal effect is not good.

[0006] The third method is to install the dust collector on a flatbed trolley and use a mobile dust removal device for dust removal. The flatbed trolley and the mobile unloading vehicle move synchronously. The dust removal effect of this dust removal method is not ideal, and the mobile dust removal device will generate secondary dust when unloading the collected dust into the ore chute. Utility Model Content

[0007] The technical problem to be solved by the utility model is how to improve the dust removal efficiency during the unloading process at the top of the silo and avoid secondary dusting.

[0008] In order to solve the above technical problems, the utility model provides a silo unloading dust removal system, including a dust collecting device and a silo suction device, the dust collecting device is installed on a mobile unloading vehicle, and is used to capture unloading dust, the silo suction device is connected to each material trough of the silo, and is used to keep the material trough in a negative pressure state, the dust collecting device includes a sealing cover and a collecting fan, the mobile unloading vehicle includes a vehicle body and a belt conveyor and a unloading pipe arranged on the vehicle body, the unloading port of the belt conveyor is aligned with the inlet of the unloading pipe, the sealing cover is arranged at the unloading port position of the belt conveyor, and the collecting fan is used to transport the dust in the sealing cover to the material trough corresponding to the unloading pipe.

[0009] The utility model discloses to dispose dust collecting device on the mobile unloading vehicle, realizes effective capture of dust at dust generating points during unloading, and the captured dust is directly sent to the material trough for reuse, and the silo suction device keeps each material trough in a negative pressure state to avoid dust. The silo unloading dust removal system solves the problems of poor dust removal effect, complex system structure, unstable operation and the like in the prior art unloading dust removal system on the trough.

[0010] Furthermore, the dust collection device includes a collection air duct, the collection fan is an exhaust fan, the inlet of the collection fan is connected to the sealing cover, the outlet is connected to the inlet of the collection air duct, the outlet of the collection air duct is arranged close to the outlet of the discharge pipe, and the collection fan transports the dust to the material trough through the collection air duct. The dust-containing gas in the sealing cover is sucked by the collection fan, and then sent to the material trough with the material through the collection air duct next to the discharge pipe, thereby realizing effective capture and reuse of dust.

[0011] Furthermore, the dust collecting device comprises a collecting hood, and the inlet of the collecting fan is connected to the sealing hood through the collecting hood. The dust-laden airflow near the collecting hood forms a certain velocity field to control the diffusion of dust.

[0012] Furthermore, the capture fan is an induced fan, which is arranged in the sealing cover and is used to send the dust into the material tank through the discharge pipe under positive pressure. The capture fan adopts the form of an induced fan, which can directly send the dust in the sealing cover into the material tank through the discharge pipe under positive pressure, without the need to set up an independent air duct.

[0013] Furthermore, the silo suction device includes a silo suction main pipe and a plurality of silo suction fans, each of which is installed on a corresponding material trough, and each of which is connected to the silo suction main pipe. The silo suction fans can keep each material trough in a negative pressure state, and the dust-containing gas extracted by the silo suction fans is uniformly processed through the silo suction main pipe.

[0014] Furthermore, the silo suction device includes a dust removal fan and a dust collector, the outlet of the silo suction main pipe is connected to the inlet of the dust collector, and the outlet of the dust collector is connected to the inlet of the dust removal fan. The dust collector is provided to purify the dust-containing gas collected by the silo suction main pipe, and the dust removal fan is used to provide power for the gas to flow in the dust collector.

[0015] Furthermore, the silo suction device comprises a chimney, and the outlet of the dust removal fan is connected to the chimney. The purified gas processed by the dust collector is discharged to the outside through the chimney.

[0016] Furthermore, the dust collector is a pulse filter cartridge type dust collector, which has the advantages of high dust removal efficiency and convenient maintenance.

[0017] Furthermore, the dust collector and the mobile unloading vehicle are arranged on the same platform, so that the distance between the dust collector and the mobile unloading vehicle is close, which is beneficial to reduce the system resistance loss.

[0018] Furthermore, the dust removal fan is a variable frequency fan. The dust removal fan can adjust the frequency according to the position of the mobile unloading vehicle. The closer the mobile unloading vehicle is to the dust collector, the lower the pipeline loss is, and the lower the output frequency of the dust removal fan is, which is conducive to reducing system energy consumption.

[0019] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The utility model provides a sealing cover and a corresponding collection fan at the discharge port of the belt conveyor to send the dust generated during the unloading process together with the material into the same trough nearby, so as to effectively capture the dust at the unloading dust generating point. The captured valuable dust enters the trough for reuse, and the floating dust in the trough is extracted and purified by the silo suction device before being discharged.

[0021] (2) The utility model silo unloading dust removal system sends the dust generated by unloading into the silo, and integrates the silo suction to extract the dust for centralized control. The dust removal system is simple as a whole and easy to maintain, achieving good dust collection and filtration effects, and significantly reducing energy consumption and total operating costs.

[0022] (3) The silo suction device of the silo unloading dust removal system of the utility model adopts a negative pressure exhaust and air supply method. The silo suction fan at the front end extracts and supplies air, the silo suction main pipe at the middle end transmits the dust-containing gas, and the dust collector at the rear end extracts and filters the clean gas for discharge. The silo unloading dust removal system can switch the corresponding silo suction fan to work according to the position of the mobile unloading vehicle, and adjust the power of the dust removal fan by frequency conversion, effectively extract the floating and overflowing dust in the trough, and reduce the energy consumption of the system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the silo unloading and dust removal system in the embodiment of the utility model.

[0024] Figure 2 It is a schematic diagram of the structure of the dust collection device in the embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1-dust collecting device, 11-sealing cover, 12-collecting fan, 13-collecting air duct, 14-collecting cover, 21-bin suction fan, 22-bin suction main pipe, 23-dust collector, 24-dust collecting fan, 25-chimney, 3-mobile unloading vehicle, 31-vehicle body, 32-belt conveyor, 33-unloading pipe, 4-material trough. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but only represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that similar marks and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0028] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and 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, and therefore cannot be understood as a limitation on the present utility model.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Combination Figure 1 and Figure 2 As shown, this embodiment provides a silo unloading dust removal system, which is used for dust removal at the unloading part of the trough 4 to improve the environment of the work station in the trough area. The silo includes a plurality of troughs 4, each of which stores the same or different materials. A mobile unloading vehicle 3 is arranged above the silo, and the mobile unloading vehicle 3 reciprocates along a track arranged on the top of the silo, and the track is generally arranged at the center line of the silo. The mobile unloading vehicle 3 includes a vehicle body 31, a belt conveyor 32 and a unloading pipe 33, and the belt conveyor 32 and the unloading pipe 33 are installed on the vehicle body 31, wherein the unloading port of the belt conveyor 32 is aligned with the inlet of the unloading pipe 33. The unloading process of the mobile unloading vehicle 3 is as follows: the vehicle body 31 moves to a set position so that the outlet of the unloading pipe 33 corresponds to the opening of the trough 4, and the belt conveyor 32 conveys the material to the unloading pipe 33, and transmits it to the trough 4 through the unloading pipe 33.

[0031] During the unloading process of the mobile unloading vehicle 3, dust will be generated at the discharge port of the belt conveyor 32. The silo unloading dust removal system of this embodiment includes a dust collection device 1, which is installed on the mobile unloading vehicle 3 and moves synchronously with the mobile unloading vehicle 3 to collect unloading dust. Specifically, the dust collection device 1 includes a sealing cover 11 and a collection fan 12. The sealing cover 11 is set at the discharge port of the belt conveyor 32. The dust generated by unloading will be enclosed in the sealing cover 11. The collection fan 12 is used to transport the dust in the sealing cover 11 to the material trough 4 corresponding to the unloading pipe 33, so as to effectively capture the dust during unloading. The captured dust can be directly reused by sending it to the material trough 4.

[0032] Combination Figure 2As shown, the collecting fan 12 of this embodiment is an exhaust fan, and the dust collecting device 1 includes a collecting air duct 13. The inlet of the collecting fan 12 is connected to the sealing cover 11, and the outlet is connected to the inlet of the collecting air duct 13. The outlet of the collecting air duct 13 is arranged close to the outlet of the discharge pipe 33. When discharging, the collecting fan 12 is started to suck the dust-containing gas in the sealing cover 11 into the collecting air duct 13, and the dust-containing gas is sent to the same material trough 4 through the collecting air duct 13 together with the material in the discharge pipe 33, so as to realize the effective collection and reuse of dust.

[0033] In this embodiment, the dust collecting device 1 includes a collecting hood 14, which is disposed at the inlet of the collecting fan 12 and connected to the sealing hood 11. The provision of the collecting hood 14 is beneficial to reducing the diffusion of dust.

[0034] In another embodiment, the capture fan 12 is an induced fan, which is directly installed in the sealing cover 11 to form a positive pressure in the sealing cover 11. When unloading, the capture fan 12 is started, and the dust-containing gas in the sealing cover 11 is sent to the material trough 4 through the discharge pipe 33 under positive pressure. The dust collection device 1 of this embodiment does not need to be provided with an independent air duct, and can also achieve technical effects similar to those of the above embodiment.

[0035] Combination Figure 1 As shown, the silo unloading dust removal system also includes a silo suction device, which is connected to each hopper 4 of the silo, and is used to keep the hopper 4 in a negative pressure state to avoid dust from the slot. Specifically, the silo suction device includes a silo suction main pipe 22 and a plurality of silo suction fans 21. At least one silo suction fan 21 is provided on the top of each hopper 4. Each silo suction fan 21 is connected to the silo suction main pipe 22, and the extracted dust-containing gas is uniformly processed through the silo suction main pipe 22.

[0036] The silo suction device also includes a silo suction device dust collector 23, a dust removal fan 24 and a chimney 25. The outlet of the silo suction main pipe 22 is connected to the inlet of the dust collector 23, the outlet of the dust collector 23 is connected to the inlet of the dust removal fan 24, and the outlet of the dust removal fan 24 is connected to the chimney 25. The dust collector 23 is provided for purifying the dust-containing gas collected by the silo suction main pipe 22, the dust removal fan 24 is used to provide power for the gas to flow in the dust collector 23, and the purified gas processed by the dust collector 23 is discharged through the chimney 25. The silo suction device of this embodiment adopts a negative pressure exhaust and air supply method, the silo suction fan 21 is used to exhaust and supply air at the front end, the silo suction main pipe 22 at the middle end transmits the dust-containing gas, and the dust collector 23 at the rear end exhausts and filters the gas for clean discharge.

[0037] In this embodiment, the dust collector 23 is a pulse filter cartridge type dust collector 23, which has the advantages of high dust filtering efficiency and simple maintenance. In other embodiments, other forms of dust collectors 23 may also be used.

[0038] In a preferred embodiment, the dust removal fan 24 is a variable frequency fan, and the dust removal fan 24 and the silo suction fan 21 are interlocked with the main process system. According to the moving position of the mobile unloading vehicle 3, the corresponding silo suction fan 21 is switched to work, and the power of the dust removal fan 24 is adjusted by frequency conversion to effectively extract the floating and overflowing dust in the trough 4. The closer the mobile unloading vehicle 3 is to the dust collector 23, the lower the pipeline loss, and the lower the output frequency of the dust removal fan 24, which is conducive to reducing the energy consumption of the system.

[0039] In another embodiment, the dust collector 23 and the mobile unloading vehicle 3 are installed on the same platform of the production device, so that the dust collector 23 can be close to the mobile unloading vehicle 3, reducing system resistance, which is beneficial to improving the silo suction efficiency and reducing energy consumption, achieving good dust collection and filtration effects, and reducing the total operating cost.

[0040] Compared with the existing dust removal systems, the silo unloading dust removal system provided in the above embodiment has the advantages of high dust removal efficiency, low operating energy consumption, small footprint, simple overall system, and easy maintenance. It is suitable for dust removal in various industrial trough material unloading scenarios, and provides a new template for silo feeding dust removal. It can be flexibly used in various types of production equipment and has a good prospect for promotion and application.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A silo unloading dust removal system, characterized in that: The invention comprises a dust collecting device (1) and a silo suction device. The dust collecting device (1) is installed on a mobile unloading vehicle (3) and is used to collect unloading dust. The silo suction device is connected to each material trough (4) of the silo and is used to keep the material trough (4) in a negative pressure state. The dust collecting device (1) comprises a sealing cover (11) and a collecting fan (12). The mobile unloading vehicle (3) comprises a vehicle body (31) and a belt conveyor (32) and a unloading pipe (33) arranged on the vehicle body (31). The unloading port of the belt conveyor (32) is aligned with the inlet of the unloading pipe (33). The sealing cover (11) is arranged at the unloading port of the belt conveyor (32). The collecting fan (12) is used to convey the dust in the sealing cover (11) to the material trough (4) corresponding to the unloading pipe (33).

2. The silo unloading dust removal system according to claim 1 is characterized in that: The dust collection device (1) comprises a collection air duct (13); the collection fan (12) is an exhaust fan; the inlet of the collection fan (12) is connected to the sealing cover (11); the outlet is connected to the inlet of the collection air duct (13); the outlet of the collection air duct (13) is arranged close to the outlet of the discharge pipe (33); the collection fan (12) transports the dust to the material trough (4) through the collection air duct (13).

3. The silo unloading dust removal system according to claim 2 is characterized in that: The dust collection device (1) comprises a collection hood (14), and the inlet of the collection fan (12) is connected to the sealing hood (11) through the collection hood (14).

4. The silo unloading dust removal system according to claim 1, characterized in that: The capture fan (12) is an induced fan, and the capture fan (12) is arranged in the sealing cover (11) and is used to send the dust into the material trough (4) through the discharge pipe (33) under positive pressure.

5. The silo unloading dust removal system according to any one of claims 1 to 4, characterized in that: The silo suction device comprises a silo suction main pipe (22) and a plurality of silo suction fans (21), each of the silo suction fans (21) being installed on a corresponding material trough (4), and each of the silo suction fans (21) being connected to the silo suction main pipe (22).

6. The silo unloading dust removal system according to claim 5, characterized in that: The silo suction device comprises a dust removal fan (24) and a dust collector (23); the outlet of the silo suction main pipe (22) is connected to the inlet of the dust collector (23); and the outlet of the dust collector (23) is connected to the inlet of the dust removal fan (24).

7. The silo unloading dust removal system according to claim 6, characterized in that: The silo suction device comprises a chimney (25), and the outlet of the dust removal fan (24) is connected to the chimney (25).

8. The silo unloading dust removal system according to claim 6, characterized in that: The dust collector (23) is a pulse filter cartridge type dust collector (23).

9. The silo unloading dust removal system according to claim 6, characterized in that: The dust collector (23) and the mobile unloading vehicle (3) are arranged on the same platform.

10. The silo unloading dust removal system according to claim 6, characterized in that: The dust removal fan (24) is a variable frequency fan.

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