Collecting device of coking quantitative loading station and control method

Abstract

The invention provides a collecting device for a coking quantitative loading station and a control method. The collecting device comprises a first loading station, a second loading station, a collecting device body, a branch main pipeline, a process main pipe and a dust remover. The first loading station and the second loading station are respectively provided with the corresponding collecting device and the branch main pipeline; the two sides of the sealing cover are each provided with a plurality of suction covers communicating with the interior of the sealing cover in a sealed mode, the other end of each suction cover is connected with one branch pipeline, and all the branch pipelines are connected to the same branch main pipeline. The other ends of the branch main pipelines corresponding to the first loading station and the second loading station are respectively connected to the process main pipe; and the process main pipe is connected to a gas inlet of the dust remover. The problems that an existing dust removal system of the loading station cannot collect raised dust in a short time, and the raised dust is prone to overflowing are solved.

Description

Technical Field

[0001] This invention relates to the field of metallurgical coking technology, and more particularly to a coking quantitative loading station collection device and control method. Background Technology

[0002] The rapid quantitative loading station enclosed dust removal system is a downstream component of the coke oven coking system, while the rapid quantitative loading station enclosed dust removal system is used in the coke conveying system. Coke is received by train and then transported away by train. The train receiving process generates a lot of dust, which seriously pollutes the working environment.

[0003] Currently, overseas rapid quantitative loading stations lack dedicated dust removal systems; domestic rapid quantitative loading stations have partial dust removal systems, which cannot completely solve the dust problem during material transfer. To meet environmental protection requirements, both newly built and existing loading stations must be equipped with complete dust removal systems to effectively control dust generated during all material transfer processes. A key challenge lies in the fact that loading stations have train power supply rails, preventing complete enclosure and making dust collection difficult. Loading stations #1 and #2 operate under three different conditions, requiring re-checking of airflow matching, optimization of sealing covers, control of dust flow direction, and the use of dust extraction for drainage, along with automatic switching between operating conditions. Therefore, sealing the loading station, installing jet cleaning devices, and adding dust removal systems are solutions. Currently, most loading stations lack dust removal systems, while a few have partial systems. Due to train travel direction and space limitations of the power supply rails, complete enclosures are not feasible; loading stations can only have partial seals. If dust cannot be collected quickly during train loading, it easily spills out. Summary of the Invention

[0004] To address the aforementioned technical problem that existing dust collection systems at coking stations cannot collect dust in a short time and are prone to overflow, a coking quantitative loading station collection device and control method are provided. Each loading station is equipped with a collection device to hold dust that is not collected within a certain space. The dust is then collected using suction masks. Multiple suction points are set up within the loading station, converging into a branch main pipe. Electric regulating valves are installed on the branch main pipes. The dust collection branch main pipes from all loading stations are combined into a single process main pipe, which then guides the dust to a ground station for purification. The dust collected by the dust collector in the purification equipment is transported to the ash silo by a pneumatic conveying system. This achieves effective sealing, multi-point suction, automatic switching of operating conditions, good dust collection effect, low product cost, and easy maintenance.

[0005] The technical means employed in this invention are as follows: A coking quantitative loading station collection device includes a first loading station, a second loading station, a collection device, a branch main pipeline, a process main pipeline, and a dust collector; The first loading station and the second loading station are respectively equipped with the corresponding collection device and the branch main pipeline; the collection device includes a sealing cover, a suction mask, a branch pipeline and an electric control valve; The first loading station and the second loading station are equipped with tracks for train carriages. The sealing cover is set along the tracks and has carriage entrances and exits. The unloading chutes of the first loading station and the second loading station pass through the top of the corresponding sealing cover and extend into the sealing cover. When the train carriage enters the sealing cover, the sealing cover is used to prevent dust generated during the unloading process from the unloading chutes to the train carriage from overflowing. Several suction masks communicating with the interior of the sealing cover are respectively sealed and installed on both sides of the sealing cover. The other end of each suction mask is connected to a branch pipe, and each branch pipe is connected to the same branch main pipe. An electric control valve is installed on the branch pipe to control the conduction state of the branch pipe. An electric regulating valve is installed on the branch main pipe to control the conduction state of the branch main pipe. The other end of the corresponding branch main pipelines of the first loading station and the second loading station are respectively connected to the process main pipe; the process main pipe is connected to the gas inlet of the dust collector.

[0006] Furthermore, the gas outlet at the top of the dust collector is connected to the main dust collector fan, which is connected to the chimney; the lower part of the dust collector's ash hopper is connected to the centralized ash silo via the pneumatic conveying system; by starting the main dust collector fan, the collection device is provided with the power to collect dust, so that the dust is sucked into the dust collector for purification treatment. The dust purified by the dust collector is transported to the centralized ash silo via the pneumatic conveying system for external discharge, and the purified gas is discharged through the chimney.

[0007] Furthermore, the bottom seals on both sides of the sealing cover are installed to the ground.

[0008] Furthermore, the collection device also includes a blowing device, which includes a blowing assembly and a blower unit. The blowing assembly is connected to the blower unit and is located inside the sealing cover and on the opposite side of the suction mask. The blower unit is used to provide blowing gas to the blowing assembly, so that the blowing assembly blows the dust in the sealing cover into the suction mask on the opposite side. The blowing force provided by the gas sprayed by the blowing assembly and the suction force provided by the main dust collector fan to the suction mask on the opposite side combine to collect the dust.

[0009] The present invention also provides a control method for the above-mentioned coking quantitative loading station collection device, specifically including the control of the following three operating conditions: (1) Dust control during separate unloading at the first loading station: The main dust removal fan is started, and the dust removal airflow into the collection device of the first loading station is controlled by adjusting the electric regulating valve on the branch main pipeline of the first loading station. The dust removal airflow into each suction mask is also controlled by adjusting the electric control valve on each branch pipeline. The dust generated during the unloading process from the unloading chute to the train car in the first loading station is collected by the collection device of the first loading station. After the suction mask collects the dust, it enters the branch main pipeline through the branch pipeline, and then is introduced into the dust collector for purification through the process main pipe. The dust filtered by the dust collector is transported to the centralized ash silo for discharge through the pneumatic conveying system, and the purified gas is discharged through the chimney. (2) Dust control during separate unloading at the second loading station: The main dust removal fan is started, and the dust removal airflow into the collection device of the second loading station is controlled by adjusting the electric regulating valve on the branch main pipeline of the second loading station. The dust removal airflow into each suction mask is also controlled by adjusting the electric control valve on each branch pipeline. The dust generated during the unloading process from the unloading chute to the train car in the second loading station is collected by the collection device of the second loading station. After the suction mask collects the dust, it enters the branch main pipeline through the branch pipeline, and then is introduced into the dust collector for purification through the process main pipe. The dust filtered by the dust collector is transported to the centralized ash silo for discharge through the pneumatic conveying system, and the purified gas is discharged through the chimney. (3) Dust control during simultaneous unloading at the first and second loading stations: The main dust removal fan is started, and the opening of the electric regulating valves on the corresponding branch main pipelines of the first and second loading stations is adjusted to control the dust removal air volume entering the collection devices of the first and second loading stations. The dust removal air volume entering each suction mask is also controlled by adjusting the electric control valves on each branch pipeline. The dust generated during the unloading process from the unloading chute in the first and second loading stations to the corresponding train carriages is collected by the corresponding collection devices. After the suction masks collect the dust, it enters the branch main pipeline through the branch pipeline, and then enters the dust collector for purification through the process main pipe. The dust filtered by the dust collector is transported to the centralized ash silo for discharge through the pneumatic conveying system, and the purified gas is discharged through the chimney.

[0010] Compared with the prior art, the present invention has the following advantages: 1. The coking quantitative loading station collection device and control method provided by the present invention have a sealing cover that is sealed to the ground on both sides, resulting in a good sealing effect; a suction mask and a jet blowing device are installed inside the sealing cover, and the jet blowing device works with the suction mask to collect dust, resulting in negative pressure dust collection and a good dust collection effect.

[0011] 2. The coking quantitative loading station collection device and control method provided by the present invention can collect dust from multiple dust points simultaneously, with high equipment utilization, low investment, fully automated control, and high work efficiency.

[0012] 3. The coking quantitative loading station collection device and control method provided by the present invention have an opening and closing valve installed on the dust collection pipeline at the intermittent working point. It can automatically switch and interlock control for three different working conditions, improve the effective air volume, and adjust the fan operating frequency according to the load to achieve energy-saving operation of the dust removal system. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the coking quantitative loading station collection device according to the present invention.

[0015] Figure 2 This is a schematic diagram of the jetting device described in this invention.

[0016] Figure 3 This is a schematic diagram of the collection device and various pipe structures described in this invention.

[0017] In the diagram: 1. First loading station; 2. Unloading chute; 3. First sealing cover; 4. Second loading station; 5. Train car; 6. Second sealing cover; 7. Branch main pipeline; 8. Process main pipeline; 9. Collection device; 10. Electric regulating valve; 11. Electric control valve; 12. Pulsating device; 13. Pulsating assembly; 14. Blower unit; 15. Mask suction device; 16. Branch pipeline; 17. Dust collector; 18. Pneumatic conveying system; 19. Centralized ash silo; 20. Main dust collector fan; 21. Chimney. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0022] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0023] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0024] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0025] Example 1 like Figure 1-3 As shown, the present invention provides a coking quantitative loading station collection device, including a first loading station 1, a second loading station 4, a collection device 9, a branch main pipeline 7, a process main pipeline 8, and a dust collector 17; The first loading station 1 and the second loading station 4 are respectively equipped with the corresponding collection device 9 and the branch main pipeline 7; the collection device 9 includes a sealing cover, a suction mask 15, a branch pipeline 16 and an electric control valve 11; The first loading station 1 and the second loading station 2 are equipped with tracks for train carriages 5. The sealing cover is installed along the tracks and has carriage entrances and exits. The unloading chutes 2 of the first loading station 1 and the second loading station 2 pass over the respective sealing covers and extend into the sealing covers. Figure 1 As shown, the first loading station 1 is equipped with a first sealing cover 3, and the second loading station is equipped with a second sealing cover 6; when the train car 5 travels into the sealing cover, the sealing cover is used to prevent dust generated during the process of unloading from the unloading chute 2 into the train car 5 from overflowing. A plurality of suction masks 15, which communicate with the interior of the sealing cover, are respectively sealed and installed on both sides of the sealing cover. The other end of each suction mask 15 is connected to a branch pipe 16, and each branch pipe 16 is connected to the same branch main pipe 7. An electric control valve 11 is installed on the branch pipe 16 to control the conduction state of the branch pipe 16. An electric regulating valve 10 is installed on the branch main pipe 7 to control the conduction state of the branch main pipe 7. The other end of the corresponding branch main pipe 7 of the first loading station 1 and the second loading station 2 is respectively connected to the process main pipe 8; the process main pipe 8 is connected to the gas inlet of the dust collector 17, and the dust generated during the unloading process of the first loading station 1 and the second loading station 4 can be introduced into the dust collector 17 for purification.

[0026] Furthermore, the gas outlet at the top of the dust collector 17 is connected to the main dust collector fan 20, which is connected to the chimney 21; the lower part of the ash hopper of the dust collector 17 is connected to the centralized ash silo 19 through the pneumatic conveying system 18; by starting the main dust collector fan 20, the collection device 9 is provided with the power to collect dust, so that the dust is sucked into the dust collector 17 for purification treatment. The dust purified by the dust collector 17 is transported to the centralized ash silo 19 through the pneumatic conveying system 18 for external discharge, and the purified gas is discharged through the chimney 21.

[0027] Furthermore, the bottom seals on both sides of the sealing cover are installed to the ground.

[0028] Furthermore, the collection device 9 also includes a blowing device 12, which includes a blowing assembly 13 and a blower unit 14. The blowing assembly 13 is connected to the blower unit 14 and is located inside the sealing cover and on the opposite side of the suction mask 15. The blower unit 14 provides blowing gas to the blowing assembly 13, so that the blowing assembly 13 blows the dust in the sealing cover into the suction mask 15 on the opposite side, thus playing an auxiliary role in dust collection. The blowing force provided by the gas sprayed by the blowing assembly 13 and the suction force provided by the main dust collector fan 20 to the suction mask 15 on the opposite side combine to collect the dust, thereby improving the dust collection effect.

[0029] This invention sets up collection devices at the first and second loading stations to fix dust that is not collected within a certain sealed enclosure. The dust is then collected through suction masks and branch pipes. By setting up multiple suction masks, multiple dust-generating points can be collected simultaneously. The airflow at each dust-generating point is balanced by matching pipe diameters and adjusting the operating conditions of electric regulating valves. The collected dust is then introduced to a ground station for purification. The dust collected by the dust collector of the purification equipment is transported to a centralized ash silo by a pneumatic conveying system. This invention achieves sealing of dust-generating areas, balanced airflow distribution, and automatic switching of operating conditions during material transfer, effectively preventing dust overflow. This dust removal system and control method have good effects on controlling material dust, improve the working environment of operators, and meet the requirements of relevant environmental protection and occupational health standards.

[0030] The present invention also provides a control method for the above-mentioned coking quantitative loading station collection device, specifically including the control of the following three operating conditions: (1) Dust control during separate unloading at the first loading station 1: The main dust collector fan 20 is started. The dust collection air volume entering the collection device 9 of the first loading station 1 is controlled by adjusting the electric regulating valve 10 on the branch main pipe 7 of the first loading station 1. The dust collection air volume entering each suction mask 15 is controlled by adjusting the electric control valve 11 on each branch pipe 16. The dust generated during the unloading process from the unloading chute 2 in the first loading station 1 to the train car 5 is collected by the collection device 9 of the first loading station 1 to prevent dust from overflowing. The suction masks 15 collect the dust with the assistance of the jet blowing device 12 and then enter the branch main pipe 7 through the branch pipe 16. Then, it is introduced into the dust collector 17 for purification through the process main pipe 8. The dust filtered by the dust collector 17 is transported to the centralized ash silo 19 for discharge through the pneumatic conveying system 18. The purified gas is discharged through the chimney 21. The main dust collector fan 20 is in high speed and the speed remains constant. (2) Dust control during separate unloading at the second loading station 4: The main dust collector fan 20 is started. The dust collection air volume entering the collection device 9 of the second loading station 4 is controlled by adjusting the electric regulating valve 10 on the branch main pipe 7 of the second loading station 4. The dust collection air volume entering each suction mask 15 is controlled by adjusting the electric control valve 11 on each branch pipe 16. The dust generated during the unloading process from the unloading chute 2 in the second loading station 4 to the train car 5 is collected by the collection device 9 of the second loading station 4 to prevent dust from overflowing. The suction masks 15 collect the dust with the assistance of the jet blowing device 12 and then enter the branch main pipe 7 through the branch pipe 16. Then, it is introduced into the dust collector 17 for purification through the process main pipe 8. The dust filtered by the dust collector 17 is transported to the centralized ash silo 19 for discharge through the pneumatic conveying system 18. The purified gas is discharged through the chimney 21. The main dust collector fan 20 is in high speed and the speed remains constant. (3) Dust control during simultaneous unloading at loading station 1 and loading station 4: The main dust removal fan 20 is started. The opening of the electric regulating valve 10 on the corresponding branch main pipe 7 of the first loading station 1 and the second loading station 4 is adjusted to control the dust removal air volume entering the collection device 9 of the first loading station 1 and the second loading station 4. The dust removal air volume entering each suction mask 15 is controlled by adjusting the electric control valve 11 on each branch pipe 16. The dust generated during the unloading process of the unloading chute 2 in the first loading station 1 and the second loading station 4 into the corresponding train carriage 5 is collected by the corresponding collection device 9 to prevent dust from overflowing. After the dust is collected by the suction mask 15 and the jet blowing device 12, it enters the branch main pipe 7 through the branch pipe 16 and then enters the dust collector 17 through the process main pipe 8 for purification. The dust filtered by the dust collector 17 is transported to the centralized ash silo 19 for discharge through the pneumatic conveying system 18. The purified gas is discharged through the chimney 21. Under this condition, the opening and closing state of the electric regulating valve 10 on the corresponding branch main pipe 7 of the first loading station 1 and the second loading station 4 is kept consistent.

[0031] Furthermore, the opening and closing of the electric regulating valves 10 on the corresponding branch main pipelines 7 of the first loading station 1 and the second loading station 4 are interlocked with the opening and closing of the corresponding unloading chute 2.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coking metering station collection device, characterized in that, It includes a first loading station (1), a second loading station (4), a collection device (9), a branch main pipeline (7), a process main pipeline (8), and a dust collector (17); The first loading station (1) and the second loading station (4) are respectively equipped with the corresponding collection device (9) and the branch main pipeline (7); the collection device (9) includes a sealing cover, a suction mask (15), a branch pipeline (16) and an electric control valve (11); The first loading station (1) and the second loading station (2) are provided with tracks for use by train carriages (5). The sealing cover is provided along the tracks and has carriage entrances and exits. The unloading chute (2) of the first loading station (1) and the second loading station (2) passes through the top of the corresponding sealing cover and extends into the sealing cover. When the train carriage (5) travels into the sealing cover, the sealing cover is used to prevent dust generated during the unloading process from the unloading chute (2) to the train carriage (5) from overflowing. The sealing cover has several suction masks (15) that are connected to the inside of the sealing cover on both sides. Each suction mask (15) is connected to a branch pipe (16) at the other end. Each branch pipe (16) is connected to the same branch main pipe (7). The branch pipe (16) is equipped with an electric control valve (11) to control the conduction state of the branch pipe (16). The branch main pipe (7) is equipped with an electric regulating valve (10) to control the conduction state of the branch main pipe (7). The other end of the corresponding branch main pipe (7) of the first loading station (1) and the second loading station (2) is connected to the process main pipe (8); the process main pipe (8) is connected to the gas inlet of the dust collector (17).

2. The coking quantitative loading station collection device according to claim 1, characterized in that, The gas outlet at the top of the dust collector (17) is connected to the main dust collector fan (20), which is connected to the chimney (21). The lower part of the ash hopper of the dust collector (17) is connected to the centralized ash silo (19) through the pneumatic conveying system (18). By starting the main dust collector fan (20), the collection device (9) is provided with the power to collect dust, so that the dust is sucked into the dust collector (17) for purification. The dust purified by the dust collector (17) is transported to the centralized ash silo (19) through the pneumatic conveying system (18) for external discharge. The purified gas is discharged through the chimney (21).

3. The coking quantitative loading station collection device according to claim 1, characterized in that, The bottom seals on both sides of the sealing cover are installed to the ground.

4. The coking quantitative loading station collection device according to claim 2, characterized in that, The collection device (9) further includes a jet blowing device (12), which includes a jet blowing assembly (13) and a blower unit (14). The jet blowing assembly (13) is connected to the blower unit (14). The jet blowing assembly (13) is located inside the sealing cover and is positioned on the opposite side of the suction mask (15). The blower unit (14) is used to provide jet blowing gas to the jet blowing assembly (13), so that the jet blowing assembly (13) blows the dust in the sealing cover into the suction mask (15) on the opposite side. The jet blowing force provided by the gas ejected by the jet blowing assembly (13) and the suction force provided by the dust removal main fan (20) to the suction mask (15) on the opposite side form a combined force to collect the dust.

5. The control method for the coking quantitative loading station collection device according to claim 1, characterized in that, Specifically, this includes the control of the following three operating conditions: (1) Dust control during separate unloading at the first loading station: The main dust removal fan (20) is started. The dust removal air volume in the collection device (9) of the first loading station (1) is controlled by adjusting the electric regulating valve (10) on the branch main pipe (7) of the first loading station (1). The dust removal air volume in each suction mask (15) is controlled by adjusting the electric control valve (11) on each branch pipe (16). The dust generated during the unloading process of the unloading chute (2) in the first loading station (1) to the train car (5) is collected by the collection device (9) of the first loading station (1). After the suction mask (15) collects the dust, it enters the branch main pipe (7) through the branch pipe (16) and then enters the dust collector (17) through the process main pipe (8) for purification. The dust filtered by the dust collector (17) is transported to the centralized ash silo (19) through the pneumatic conveying system (18) and discharged. The purified gas is discharged through the chimney (21). (2) Dust control during separate unloading at the second loading station (4) The main dust removal fan (20) is started. The dust removal air volume entering the collection device (9) of the second loading station (4) is controlled by adjusting the electric regulating valve (10) on the branch main pipe (7) of the second loading station (4). The dust removal air volume entering each suction mask (15) is controlled by adjusting the electric control valve (11) on each branch pipe (16). The dust generated during the unloading process of the unloading chute (2) in the second loading station (4) to the train car (5) is collected by the collection device (9) of the second loading station (4). After the suction mask (15) collects the dust, it enters the branch main pipe (7) through the branch pipe (16) and then enters the dust collector (17) through the process main pipe (8) for purification. The dust filtered by the dust collector (17) is transported to the centralized ash silo (19) through the pneumatic conveying system (18) and discharged. The purified gas is discharged through the chimney (21). (3) Dust control during simultaneous unloading at the first loading station (1) and the second loading station (4): Start the main dust removal fan (20), and control the dust removal air volume in the collection device (9) of the first loading station (1) and the second loading station (4) by adjusting the opening of the electric regulating valve (10) on the corresponding branch main pipe (7) of the first loading station (1) and the second loading station (4), and control the dust removal air volume in each suction mask (15) by adjusting the electric control valve (11) on each branch pipe (16); the dust generated during the unloading trough (2) in the first loading station (1) and the second loading station (4) unloads material into the corresponding train carriage (5) is collected by the corresponding collection device (9), and after the suction mask (15) collects the dust, it enters the branch main pipe (7) through the branch pipe (16), and then enters the dust collector (17) through the process main pipe (8) for purification treatment; the dust filtered by the dust collector (17) is transported to the centralized ash silo (19) through the pneumatic conveying system (18) and discharged outside, and the purified gas is discharged outside through the chimney (21).

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