Dust dissipation and recovery system for dedusting ash bin of coking plant

Abstract

The invention discloses a dust dissipation and recovery system for a dedusting ash bin of a coking plant, and relates to the technical field of industrial dedusting, the system comprises a dedusting ash unloading room, an ash tank operation platform, a dedusting ash storage tank, a dust collecting pipeline, an automatic sealing gate, a dust humidifying and stirring system, a dedusting butterfly valve, a fluid conveying control valve, a deduster and a control device; a mounting hole corresponding to the dedusting ash storage tank is formed in the side wall of the dedusting ash discharging room, one end of the dust collecting pipeline is arranged in the mounting hole, the other end of the dust collecting pipeline is connected to the input end of the dust remover, and the output end of the dedusting ash storage tank is connected to the input end of the dust humidifying and stirring system. A dust suction inlet is formed in the end, located in the dedusting ash discharging room, of the dust collecting pipeline, the dedusting butterfly valve is installed in the dust collecting pipeline, and the automatic sealing gate is installed at an inlet of the dedusting ash discharging room. Through the arrangement, dust pollution is remarkably reduced, equipment corrosion is relieved, the manual cleaning strength is reduced, and the working environment is improved.

Description

Technical Field

[0001] This application relates to the technical field of industrial dust removal, and particularly relates to a dust escape recovery system for a dust storage bin in a coking plant. Background Art

[0002] During the coking production process, the pulse bag filter is the core equipment for treating dust in the processes of coke pushing from the coke oven, charging the dry quenching coke, and transporting coke. The pulse bag filter adsorbs the dust-containing flue gas through negative pressure. After being filtered by the cloth bag and neutralized by acid and alkali, the coke powder enters the ash storage tank through the pneumatic ash conveying system, and finally is wetted by a humidifying mixer and then loaded into the transfer vehicle. However, in the related art, during the process of loading the coke powder wetted by the humidifying mixer into the transfer vehicle, due to the large amount of coke powder and the fluctuation of the ash conveying pressure, the humidification is uneven, the dust suppression effect is poor, a large amount of dust escapes from the ash discharging room, and the adjustment of the humidifying water volume and the ash volume depends on manual operation, with insufficient stability. At the same time, the open working environment leads to increased dust pollution, equipment corrosion, and increased manual cleaning intensity. Therefore, there are problems of serious dust escape, low automation degree, and environmental and health hazards during the process of discharging ash from the ash storage tank to the transfer vehicle. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. For this purpose, this application proposes a dust escape recovery system for a dust storage bin in a coking plant, constructing a more closed, intelligent, and efficient end link for dust treatment, significantly reducing dust pollution, reducing equipment corrosion, reducing manual cleaning intensity, and improving the working environment.

[0004] This application provides a dust escape recovery system for a dust storage bin in a coking plant, including: a dust removal ash discharging room, an ash tank operation platform, a dust removal ash storage tank, a dust collection pipeline, an automatic sealing gate, a dust humidifying and mixing system, a dust removal butterfly valve, a fluid conveying control valve, a dust collector, and a control device;

[0005] An installation hole corresponding to the dust removal ash storage tank is opened on the side wall of the dust removal ash discharging room. The ash tank operation platform is located above the dust removal ash discharging room. The dust removal ash storage tank is arranged on the ash tank operation platform. One end of the dust collection pipeline is placed in the installation hole. The other end of the dust collection pipeline is connected to the input end of the dust collector. The output end of the dust collector is connected to the input end of the dust removal ash storage tank. The output end of the dust removal ash storage tank is connected to the input end of the dust humidifying and mixing system. And a dust suction port is opened at one end of the dust collection pipeline located in the dust removal ash discharging room. The fluid conveying control valve is arranged at the output end of the dust removal ash storage tank. The dust removal butterfly valve is installed in the dust collection pipeline, and the dust removal butterfly valve is located between the dust suction port and the dust collector. The automatic sealing gate is installed at the entrance of the dust removal ash discharging room;

[0006] The control device is respectively connected to the automatic sealing gate, the dust humidifying and stirring system, the dust removal butterfly valve, the fluid conveying control valve, and the dust collector; the automatic sealing gate is used to maintain the closed environment of the dust removal ash unloading room and automatically open and close when the dust transfer vehicle enters and exits the dust removal ash unloading room; the dust removal ash storage tank is used to receive and temporarily store the dust to be processed conveyed by the dust collector; the control device is used to control the dust to be processed in the dust removal ash storage tank to be conveyed to the dust humidifying and stirring system through the fluid conveying control valve; the control device is further used to, after the dust transfer vehicle enters the dust removal ash unloading room, control the dust humidifying and stirring system to humidify and stir the dust to be processed to obtain wetted dust, and convey the wetted dust to the dust transfer vehicle; the control device is further used to, after the dust transfer vehicle enters the dust removal ash unloading room, control the opening degree of the dust removal butterfly valve to control the dust collection pipeline to suck the dust in the dust removal ash unloading room; the dust collection pipeline is further used to convey the sucked dust to the dust collector.

[0007] According to some embodiments of the present application, the dust collector includes a filter bag assembly, a dust collector box body, and an induced draft fan. The filter bag assembly is arranged in the dust collector box body. The output end of the dust collection pipeline and the induced draft fan are respectively connected to the dust collector box body, and both the dust collection pipeline and the induced draft fan are respectively communicated with the inside of the dust collector box body.

[0008] According to some embodiments of the present application, the bottom end of the dust removal ash storage tank is of an inverted triangular structure, and a vibrator is installed on the side wall of the bottom end of the dust removal ash storage tank.

[0009] According to some embodiments of the present application, the dust escape recovery system of the coking plant dust removal ash bin further includes a dust discharge pipeline. The input end of the dust discharge pipeline is connected to the output end of the dust removal ash storage tank. The output end of the dust discharge pipeline extends into the dust removal ash unloading room. The dust humidifying and stirring system is installed on the dust discharge pipeline. The fluid conveying control valve is installed on the dust discharge pipeline, and the fluid conveying control valve is arranged close to the output end of the dust removal ash unloading room.

[0010] According to some embodiments of the present application, the dust humidifying and stirring system includes a dust flow control valve, a dust humidifying stirrer, and a humidifying water assembly. The dust humidifying stirrer is arranged inside the dust discharge pipeline. Both the dust flow control valve and the humidifying water assembly are installed on the dust discharge pipeline close to the dust humidifying stirrer. The dust flow control valve is arranged between the fluid conveying control valve and the dust humidifying stirrer. The dust flow control valve, the dust humidifying stirrer, and the humidifying water assembly are respectively connected to the control device.

[0011] According to some embodiments of the present application, the humidifying water component includes a humidifying water control pneumatic valve and a humidifying water delivery pipeline. The input end of the humidifying water delivery pipeline is connected to the side wall of the ash discharge pipeline near the dust humidifying mixer, and the humidifying water delivery pipeline is internally communicated with the ash discharge pipeline. The humidifying water control pneumatic valve is installed on the humidifying water delivery pipeline and is arranged close to the ash discharge pipeline, and the humidifying water control pneumatic valve is connected to the control device.

[0012] According to some embodiments of the present application, the control device is a PLC control system.

[0013] In the present application, through the dual means of physical enclosure (dust removal ash unloading room + automatic sealing gate) and active negative pressure collection (dust collection pipeline + dust collector), the escape of dust during the key loading process is effectively curbed; the central control device is used to realize the automatic control of the entire process of dust reception, temporary storage, humidification, loading and internal dust collection, reduce manual intervention, and improve stability and uniformity; through this setting, the present application constructs a more enclosed, intelligent and efficient end link of dust treatment, significantly reduces dust pollution, reduces equipment corrosion, reduces the intensity of manual cleaning, improves the working environment, and thus effectively solves the problems of serious dust escape, low automation level, and environmental and health hazards.

[0014] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The additional aspects and advantages of the present application will become apparent and be easily understood in conjunction with the following description of the embodiments with reference to the accompanying drawings, wherein:

[0016] Figure 1 is a cross-sectional schematic view of the dust escape recovery system of the coking plant dust removal ash bin provided by the embodiment of the present application;

[0017] Figure 2 is a partial cross-sectional schematic view of the dust escape recovery system of the coking plant dust removal ash bin provided by the embodiment of the present application.

[0018] Reference numerals:

[0019] Dust collection pipeline 110, dust removal butterfly valve 111;

[0020] Dust removal ash storage tank 210, vibrator 211, fluid delivery control valve 212, dust humidifying mixing system 220, dust flow control valve 221, dust humidifying mixer 222;

[0021] Dust collector box body 300, filter bag assembly 310, induced draft fan 320. Detailed implementation manners

[0022] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as a limitation to the present application.

[0023] In the description of the present application, it should be understood that with regard to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0024] In the description of the present application, if the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0025] In the description of the present application, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.

[0026] In the coking production process, the pulse bag filter is the core equipment for treating dust in the coke pushing of the coke oven, the coke charging of the dry coke quenching, and the coke transportation link. The pulse bag filter adsorbs the dusty flue gas through negative pressure. After being filtered by the bag and neutralized by acid and alkali, the coke powder enters the ash storage tank through the pneumatic ash conveying system and is finally wetted by the humidifying mixer and then loaded into the transfer vehicle. However, in the related art, during the process of loading the coke powder wetted by the humidifying mixer into the transfer vehicle, due to the large amount of coke powder and the fluctuation of the ash conveying pressure, the humidification is uneven, the dust suppression effect is poor, and a large amount of dust escapes from the ash discharging room. At the same time, the adjustment of the humidifying water volume and the ash volume depends on manual operation, and the stability is insufficient. In addition, the open operation environment leads to increased dust pollution, equipment corrosion, and increased manual cleaning intensity. As a result, there are problems such as serious dust escape, low automation degree, and environmental and health hazards during the process of discharging ash from the ash storage tank to the transfer vehicle.

[0027] Refer to Figures 1 to 2, an embodiment of the present application provides a dust removal system for the ash discharge room, including a dust removal ash discharge room, an ash tank operation platform, a dust removal ash storage tank 210, a dust collection pipeline 110, an automatic sealing gate, a dust humidification and stirring system 220, a dust removal butterfly valve 111, a fluid transfer control valve 212, a dust collector, and a control device; an installation hole corresponding to the dust removal ash storage tank 210 is opened on the side wall of the dust removal ash discharge room, the ash tank operation platform is located above the dust removal ash discharge room, the dust removal ash storage tank 210 is arranged on the ash tank operation platform, one end of the dust collection pipeline 110 is placed in the installation hole, the other end of the dust collection pipeline 110 is connected to the input end of the dust collector, the output end of the dust collector is connected to the input end of the dust removal ash storage tank 210, the output end of the dust removal ash storage tank 210 is connected to the input end of the dust humidification and stirring system 220, and a dust suction port is opened at one end of the dust collection pipeline 110 located in the dust removal ash discharge room, the fluid transfer control valve 212 is arranged at the output end of the dust removal ash storage tank 210, the dust removal butterfly valve 111 is installed in the dust collection pipeline 110, and the dust removal butterfly valve 111 is located between the dust suction port and the dust collector, the automatic sealing gate is installed at the entrance of the dust removal ash discharge room; the control device is respectively connected to the automatic sealing gate, the dust humidification and stirring system 220, the dust removal butterfly valve 111, the fluid transfer control valve 212, and the dust collector; the automatic sealing gate is used to maintain the closed environment of the dust removal ash discharge room and automatically open and close when the dust transfer vehicle enters and exits the dust removal ash discharge room; the dust removal ash storage tank 210 is used to receive and temporarily store the dust to be treated transported by the dust collector; the control device is used to control the dust to be treated in the dust removal ash storage tank 210 to be transported to the dust humidification and stirring system 220 through the fluid transfer control valve 212; the control device is further used to, after the dust transfer vehicle enters the dust removal ash discharge room, control the dust humidification and stirring system 220 to humidify and stir the dust to be treated to obtain wet dust, and transport the wet dust to the dust transfer vehicle; the control device is further used to, after the dust transfer vehicle enters the dust removal ash discharge room, control the dust collection pipeline 110 to suck the dust in the dust removal ash discharge room by controlling the opening degree of the dust removal butterfly valve 111; the dust collection pipeline 110 is further used to transport the sucked dust to the dust collector.

[0028] In some embodiments, a 750x750mm hole is drilled in the original ash discharge room of the dust removal ash discharge room, and a dust removal pipeline with a diameter of φ712mm is installed. The lowest end of the dust removal pipeline is 3.6 meters from the ground to ensure that the dust removal pipeline does not affect the normal passage of the ash discharge vehicle. At the same time, the vehicle inlet is sealed. The dust removal butterfly valve is located 11.9 meters above the ash bin platform. The dust removal butterfly valve is used to adjust the air volume of the pipeline and control the negative pressure intensity of the ash discharge room.

[0029] Specifically, the dust removal system for the ash discharging room set in this application has the following functions: (1) Fundamentally solve the problem of dust escape: ① Enclosed environment: By setting up a dedicated dust removal ash discharging room and installing an automatic sealing gate at its entrance, the system is completely enclosed when the dust transfer vehicle is not entering or leaving, physically blocking the main channel for dust to escape to the external environment. The automatic opening and closing of the gate also reduces the risk of poor sealing or forgetting to close caused by manual operation; ② Actively collect escaped dust: A dust suction inlet is set on the side wall of the discharging room, connected to the dust collection pipeline 110, the dust removal butterfly valve 111, and the dust collector. When the dust transfer vehicle is loading materials in the enclosed discharging room (even if there is dust rising), the control device can open the dust removal butterfly valve 111 and use the negative pressure of the dust collector to actively suck and collect the dust in the air in the discharging room. These collected dusts are then sent back to the dust removal ash storage tank 210 for treatment, forming a closed loop, greatly reducing the accumulation of dust inside the discharging room and the chance of escaping to the outside. The opening degree control of the dust removal butterfly valve 111 allows the system to precisely adjust the suction intensity according to the dust rising situation. (2) Significantly improve the degree of automation: ① Core control center: The control device, as the core, connects and coordinates the automatic sealing gate, the dust humidification and stirring system 220, the dust removal butterfly valve 111, the fluid conveying control valve 212, and the dust collector, which realizes the centralized automatic control of the entire process from dust reception, temporary storage, humidification and stirring to loading; ② Automation of key processes: Dust conveying control: The control device automatically controls the flow rate and rate of dust conveyed from the dust removal ash storage tank 210 to the humidification and stirring system through the fluid conveying control valve 212, replacing manual adjustment; ③ Humidification and stirring control: The control device directly controls the operation of the dust humidification and stirring system 220, can precisely control the water addition amount, stirring time and intensity, ensure the uniformity of humidification, and reduce the phenomena of dry ash or over-wet caused by unstable manual operation; ④ Dust collection process control: The control device automatically controls the suction intensity of dust in the discharging room by adjusting the opening degree of the dust removal butterfly valve 111; ⑤ Environment enclosure control: The opening and closing of the automatic sealing gate are also managed by the control device to ensure that the discharging room remains closed when not in operation; ⑥ Reduce dependence on manual labor: The above automation functions significantly reduce the dependence on manual operations such as adjusting the water volume, ash volume, ventilation, and opening and closing doors, improving the stability and consistency of the system operation.(3)Effectively reduce environmental and health hazards: ①Source control of dust: The enclosed unloading chamber and efficient internal dust collection system greatly reduce the emission of dust into the external atmosphere during operation from the source, improving the air quality in the workplace and the surrounding environment; ②Reduce equipment corrosion: The reduction of dust dispersion means that the amount of dust deposited on the equipment (especially the equipment inside and near the unloading chamber) is significantly reduced, thus slowing down the corrosion rate of the dust (especially the potentially corrosive coke powder) to the equipment; ③Reduce the cleaning intensity: The dust inside the unloading chamber is effectively collected and treated, no longer deposited in large quantities on the walls, floors and equipment, significantly reducing the area and workload that need to be manually cleaned later; ④Protect personnel health: The risk of operators being exposed to a high-concentration dust environment is greatly reduced, especially in the key link of loading the dust transfer vehicle, improving the occupational health conditions. (4)Optimize the process and structure: ①Buffer and temporary storage: The dust removal ash storage tank 210 is clearly used as a container to receive and temporarily store the dust to be treated from the dust collector, providing a buffer that may help to stabilize the influence of the ash conveying pressure fluctuation on the downstream humidification process (although the claims do not directly describe pressure regulation, the buffering effect itself helps to improve stability); ②Reasonable space layout: The ash tank operation platform is located above the dust removal ash unloading chamber, and the dust removal ash storage tank 210 is placed on it. The dust collection pipeline 110 is connected to the dust collector from the installation hole on the side wall of the unloading chamber. This layout is compact and conducive to the directional flow and collection of dust; ③Closed-loop treatment: The dust collected by the dust collection pipeline 110 is not directly discharged, but sent back to the dust collector (or finally enters the storage tank), reflecting the concept of resource recovery and environmental protection.

[0030] In this application, through the dual means of physical enclosure (dust removal ash unloading chamber + automatic sealing gate) and active negative pressure collection (dust collection pipeline 110 + dust collector), the dispersion of dust in the key loading link is effectively curbed; the central control device is used to realize the automatic control of the entire process of dust reception, temporary storage, humidification, loading and internal dust collection, reducing manual intervention and improving stability and uniformity; through this setting, this application constructs a more enclosed, intelligent and efficient end link of dust treatment, significantly reducing dust pollution, reducing equipment corrosion, reducing the manual cleaning intensity, improving the working environment, and thus effectively solving the problems of serious dust dispersion, low automation level, environmental and health hazards.

[0031] Refer to Figure 1 , it can be understood that the dust collector includes a filter bag assembly 310, a dust collector housing 300 and a draft fan 320. The filter bag assembly 310 is arranged in the dust collector housing 300. The output end of the dust collection pipeline 110 and the draft fan 320 are respectively connected to the dust collector housing 300, and both the dust collection pipeline 110 and the draft fan 320 are respectively communicated with the inside of the dust collector housing 300.

[0032] It should be noted that the functions of the dust collector are as follows: (1) Recycling and collecting the escaped dust: A negative pressure is formed inside the dust collector housing 300 by the induced draft fan 320, and the dust escaped from the ash discharging room is sucked into the dust collector through the dust collecting pipeline 110 and then secondarily filtered by the filter bag assembly 310 to achieve the recycling and collection of the dust; (2) Maintaining the stability of the system negative pressure: The coordinated operation of the induced draft fan 320 and the dust collecting pipeline 110 ensures that the ash discharging room is continuously in a negative pressure state to prevent the dust from overflowing; (3) Reusing the existing equipment: Directly utilizing the filter bag assembly 310 and the housing structure of the original pulse bag dust collector to reduce the transformation cost.

[0033] Referring to Figure 1 and Figure 2 , it can be understood that the bottom end of the dust removal ash storage tank 210 is of an inverted triangular structure, and a vibrator 211 is installed on the side wall of the bottom end of the dust removal ash storage tank 210.

[0034] In some embodiments, two vibrators 211 are provided, and the two vibrators 211 are symmetrically installed on the outer side wall of the bottom end of the dust removal ash storage tank 210.

[0035] It should be noted that the bottom end of the dust removal ash storage tank 210 is of an inverted triangular structure. The inverted triangular structure utilizes gravity to concentrate the coke powder, avoiding ash accumulation or blockage at the bottom of the dust removal ash discharging room and promoting the smooth falling of the coke powder; the vibrator 211 periodically vibrates to break the adhesion and caking of the coke powder, ensuring that the dust enters the ash discharging pipeline evenly and continuously and preventing the dust from caking: The vibrator 211 is controlled to start and stop by the control device and is linked with the ash discharging valve to reduce manual intervention.

[0036] It can be understood that the dust removal system in the ash discharging room further includes an ash discharging pipeline. The input end of the ash discharging pipeline is connected to the output end of the dust removal ash storage tank 210, the output end of the ash discharging pipeline extends into the dust removal ash discharging room, the dust humidifying and stirring system 220 is installed on the ash discharging pipeline, the fluid conveying control valve 212 is installed on the ash discharging pipeline, and the fluid conveying control valve 212 is arranged close to the output end of the dust removal ash discharging room.

[0037] It should be noted that the dust humidifying and stirring system 220 is directly integrated into the ash discharging pipeline, enabling the coke powder to be humidified and stirred synchronously during the conveying process, suppressing the dust escape during unloading, and realizing the integration of humidification and dust suppression; the fluid conveying control valve 212 (ash discharging format valve) and the flat valve (dust flow control valve 221) jointly adjust the ash amount through the control device to ensure the humidification uniformity and achieve the precise control of the dust flow; the ash discharging pipeline extends into the enclosed dust removal ash discharging room and cooperates with the automatic sealing gate to form a negative pressure environment to prevent dust leakage.

[0038] Referring to Figure 2, it can be understood that the dust humidifying and mixing system 220 includes a dust flow control valve 221, a dust humidifying mixer 222 and a humidifying water assembly. The dust humidifying mixer 222 is disposed inside the ash discharge pipeline. The dust flow control valve 221 and the humidifying water assembly are both installed on the ash discharge pipeline near the dust humidifying mixer 222. And the dust flow control valve 221 is disposed between the fluid conveying control valve 212 and the dust humidifying mixer 222. The dust flow control valve 221, the dust humidifying mixer 222 and the humidifying water assembly are respectively connected to the control device.

[0039] It should be noted that the dust flow control valve 221 (i.e., the flat valve) is located downstream of the fluid conveying control valve 212 (the ash discharging grid valve), directly regulating the amount of dust entering the mixer to avoid uneven humidification or blockage caused by excessive ash volume; the dust humidifying mixer 222 is built into the ash discharge pipeline, enabling the dust and water to be instantaneously mixed during transportation, reducing the chance of dust escaping in the pipeline; all components are uniformly controlled by the control device to achieve synchronous operations of dust flow, humidifying water volume, and stirring start and stop, replacing manual intervention and solving the problem of "uneven humidification"; through the adjacent layout (the dust flow control valve 221 and the humidifying water assembly are close to the mixer), it is ensured that the dust is immediately humidified after entering the mixer, suppressing dust emission.

[0040] It can be understood that the humidifying water assembly includes a humidifying water control pneumatic valve and a humidifying water conveying pipeline. The input end of the humidifying water conveying pipeline is connected to the side wall of the ash discharge pipeline near the dust humidifying mixer 222, and the humidifying water conveying pipeline is internally connected to the ash discharge pipeline. The humidifying water control pneumatic valve is installed on the humidifying water conveying pipeline and is arranged close to the ash discharge pipeline. The humidifying water control pneumatic valve is connected to the control device.

[0041] It should be noted that the humidifying water control pneumatic valve is controlled by the control device, dynamically adjusting the water volume according to the dust flow to avoid caking or dust emission caused by over-wetting or over-drying; the humidifying water conveying pipeline is directly connected to the side wall of the ash discharge pipeline, accurately injecting water into the position where the dust flows through to ensure full contact between the water and the dust in the mixer; the humidifying water control pneumatic valve is installed "close to the ash discharge pipeline" to shorten the response time of the water circuit, instantaneously opening and closing the water source when the dust enters the mixer, reducing equipment corrosion caused by water residue; the water circuit is internally connected to the ash discharge pipeline, with a fully enclosed operation to prevent secondary emission during the water addition process.

[0042] In some embodiments, the input end of the humidifying water conveying pipeline is connected to a water tank.

[0043] It can be understood that the control device is a PLC control system.

[0044] For example, the dust transfer vehicle is a dump truck, and the control process of the PLC control system is: Step 1: Start; Step 2: Determine whether the distance between the rear end of the dust transfer vehicle and the automatic sealing gate (i.e., the rolling door of the dust removal and ash unloading room) is less than or equal to 50CM. When the distance between the rear end of the dust transfer vehicle and the automatic sealing gate is less than or equal to 50CM, execute Step 3; When the distance between the rear end of the dust transfer vehicle and the automatic sealing gate is greater than 50CM, the automatic sealing gate automatically closes and returns to Step 1; Step 3: Automatically open the automatic sealing gate ; Step 4: The dust transfer vehicle reverses into the warehouse and determines whether the distance between the rear end of the dust transfer vehicle and the rear wall of the dust collection ash unloading room is between 60 and 80CM. When the distance between the rear end of the dust transfer vehicle and the rear wall of the dust collection ash unloading room is between 60 and 80CM, the vehicle stops and executes step 5; when the distance between the rear end of the dust transfer vehicle and the rear wall of the dust collection ash unloading room is less than 60cm, the alarm stops and the system is controlled; when the distance between the rear end of the dust transfer vehicle and the rear wall of the dust collection ash unloading room is less than 60cm, the alarm stops and the system is controlled; when the distance between the rear end of the dust transfer vehicle and the rear wall of the dust collection ash unloading room is less than 60cm, the alarm stops and the system is controlled; When the distance from the back wall of the ash unloading room is greater than 80cm, the dust humidification and stirring system 220 is automatically closed; Step 5: Automatically open the dust humidification and stirring system 220; Step 6: Synchronously and automatically open the DN700 dust removal butterfly valve 111 in the dust removal ash unloading room; Step 7: After 5 seconds, the humidification water control pneumatic valve, fluid delivery control valve 212 and dust flow control valve 221 are synchronously opened; Step 8: Automatically open the vibrator 211 after an interval of 5 seconds; Step 9: After the dust transfer vehicle has finished unloading, the alarm sounds and the dust removal ash unloading room is closed. When discharging ash from the material room, the vibrator 211, dust flow control valve 221, fluid delivery control valve 212, humidifying water control pneumatic valve, humidifying agitator, and DN700 dust removal butterfly valve 111 are shut down one by one every 5 seconds from top to bottom; Step 10: The dust transfer vehicle is started and leaves the ash discharging room. When the distance between the rear end of the dust transfer vehicle and the rear wall of the dust removal ash unloading room is less than 60 cm, the alarm is triggered to shut down the system; when the distance between the rear end of the dust transfer vehicle and the rear wall of the dust removal ash unloading room is greater than 80 cm, the dust humidifying and stirring system 220 is automatically shut down.

[0045] It should be noted that the functions of the dust removal pipeline are as follows: it connects the ash discharge room and the dust collector box 300, re-inhales the dust escaping from the ash discharge room into the dust removal system for cyclic treatment, and the opening position (3.6 m above the ground) ensures vehicle passage and forms a closed negative pressure space; the DN700 dust removal butterfly valve 111 solves the problem of pressure fluctuation in the dust storage and discharge room by controlling the opening degree. The functions of the dust removal butterfly valve 111 are: adjusting the air volume in the pipeline, balancing the negative pressure between the ash discharge room and the main dust removal system, and ensuring efficient dust collection; the automatic sealing gate (rolling gate) is interlocked with the vehicle position sensor (opens when the distance ≤ 50 cm). The functions of the automatic sealing gate are: automatically opening and closing when the vehicle enters and exits, maintaining the airtight environment of the ash discharge room, and preventing negative pressure leakage; the vibrator 211 at the bottom of the dust storage tank 210 forces the material to fall, avoiding blockage. The functions of the dust storage tank 210 are: temporarily storing the coke powder collected by the dust collector, and the inverted triangle structure cooperates with the vibrator 211 to prevent ash accumulation and caking; the functions of the ash discharge pipeline are: connecting the ash storage tank and the humidifying and mixing system, and transporting the coke powder to the mixer. The fluid conveying control valve 212 (ash discharging grid valve): controls the ash output; the dust flow control valve 221 (plate valve): precisely adjusts the dust flow rate entering the mixer; the functions of the dust humidifying and mixing device 222 are: forcibly mixing the coke powder and the humidifying water to form wet dust and suppressing dust emission; the functions of the humidifying water assembly are: precisely regulating the water injection volume through the pneumatic valve controlled by the humidifying water, and realizing the automation of the ash-water ratio; the core functions of the PLC control system are: (1) timing control: interlocking the rolling gate, butterfly valve, vibrator 211, and starting and stopping of the valves (such as gradually closing the equipment 5 seconds after the ash discharge ends); (2) interlock protection: abnormal vehicle position (distance from the rear wall < 60 cm or > 80 cm) triggers an alarm or stops the machine; (3) parameter optimization: dynamically adjusting the opening degree of the butterfly valve according to the negative pressure data to ensure stable dust suction.

[0046] In this application, the dust escaping from the ash discharge room re-enters the dust collector through the newly added pipeline to form a closed-loop collection. By adjusting the air volume of the butterfly valve and constructing a stable negative pressure in the closed space, and by using the PLC to replace manual adjustment of the water volume / ash volume, the uneven humidification is eliminated. The vehicle positioning is interlocked with the starting and stopping of the equipment, preventing misoperation.

[0047] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0048] The above are the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present application.

[0049] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A dust escape recovery system for a coking plant dust bin, characterized in that, Including: Dust removal ash discharging room, ash tank operation platform, dust removal ash storage tank, dust collection pipeline, automatic sealing gate, dust humidifying and stirring system, dust removal butterfly valve, fluid conveying control valve, dust collector and control device; An installation hole corresponding to the dust removal ash storage tank is formed in the side wall of the dust removal ash discharging room. The ash tank operation platform is located above the dust removal ash discharging room. The dust removal ash storage tank is arranged on the ash tank operation platform. One end of the dust collection pipeline is placed in the installation hole, and the other end of the dust collection pipeline is connected to the input end of the dust collector. The output end of the dust collector is connected to the input end of the dust removal ash storage tank. The output end of the dust removal ash storage tank is connected to the input end of the dust humidifying and stirring system. A dust suction port is formed at one end of the dust collection pipeline located in the dust removal ash discharging room. The fluid conveying control valve is arranged at the output end of the dust removal ash storage tank. The dust removal butterfly valve is installed in the dust collection pipeline and is located between the dust suction port and the dust collector. The automatic sealing gate is installed at the entrance of the dust removal ash discharging room; The control device is respectively connected to the automatic sealing gate, the dust humidifying and stirring system, the dust removal butterfly valve, the fluid conveying control valve and the dust collector. The automatic sealing gate is used to maintain the closed environment of the dust removal ash discharging room and automatically open and close when the dust transfer vehicle enters and exits the dust removal ash discharging room. The dust removal ash storage tank is used to receive and temporarily store the dust to be processed conveyed by the dust collector. The control device is used to control the dust to be processed in the dust removal ash storage tank to be conveyed to the dust humidifying and stirring system through the fluid conveying control valve. The control device is further used to control the dust humidifying and stirring system to humidify and stir the dust to be processed to obtain wet dust and convey the wet dust to the dust transfer vehicle after the dust transfer vehicle enters the dust removal ash discharging room. The control device is further used to control the dust collection pipeline to suck the dust in the dust removal ash discharging room by controlling the opening degree of the dust removal butterfly valve after the dust transfer vehicle enters the dust removal ash discharging room. The dust collection pipeline is also used to convey the sucked dust to the dust collector.

2. The dust escape recovery system of the coking plant dust storage bin according to claim 1, characterized in that, The dust collector includes a filter bag assembly, a dust collector box body and an induced draft fan. The filter bag assembly is arranged in the dust collector box body. The output end of the dust collection pipeline and the induced draft fan are respectively connected to the dust collector box body, and the dust collection pipeline and the induced draft fan are respectively communicated with the inside of the dust collector box body.

3. The dust escape recovery system of the coking plant dust storage bin according to claim 1, characterized in that The bottom end of the dust removal ash storage tank is of an inverted triangular structure, and a vibrator is installed on the side wall of the bottom end of the dust removal ash storage tank.

4. The dust escape recovery system of the coking plant dust storage bin according to claim 1, characterized in that, The dust emission recovery system of the coking plant dust removal ash bin further includes a dust discharging pipeline. The input end of the dust discharging pipeline is connected to the output end of the dust removal ash storage tank. The output end of the dust discharging pipeline extends into the dust removal ash discharging room. The dust humidifying and stirring system is installed on the dust discharging pipeline. The fluid conveying control valve is installed on the dust discharging pipeline, and the fluid conveying control valve is arranged close to the output end of the dust removal ash discharging room.

5. The dust escape recovery system of the coking plant dust storage bin according to claim 4, characterized in that The dust humidifying and mixing system includes a dust flow control valve, a dust humidifying mixer, and a humidifying water assembly. The dust humidifying mixer is disposed inside the ash discharge pipeline. The dust flow control valve and the humidifying water assembly are both installed on the ash discharge pipeline near the dust humidifying mixer, and the dust flow control valve is disposed between the fluid conveying control valve and the dust humidifying mixer. The dust flow control valve, the dust humidifying mixer, and the humidifying water assembly are respectively connected to the control device.

6. The dust escape recovery system of the coking plant dust storage bin according to claim 5, characterized in that, The humidifying water assembly includes a humidifying water control pneumatic valve and a humidifying water conveying pipeline. The input end of the humidifying water conveying pipeline is connected to the side wall of the ash discharge pipeline near the dust humidifying mixer, and the humidifying water conveying pipeline is communicated with the inside of the ash discharge pipeline. The humidifying water control pneumatic valve is installed on the humidifying water conveying pipeline, and the humidifying water control pneumatic valve is disposed near the ash discharge pipeline. The humidifying water control pneumatic valve is connected to the control device.

7. The dust escape recovery system of the coking plant dust storage bin according to claim 5, characterized in that, The control device is a PLC control system.

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