Dust emission recovery system for coking plant dust removal ash bin
By constructing a closed dust removal and unloading room and dust collection pipeline system in the coking plant, combined with automated control devices, the problems of dust dispersion and low automation during the coke powder loading process were solved, achieving more efficient dust treatment, reducing environmental pollution and equipment corrosion, and improving working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 宁夏宝丰能源集团焦化二厂有限公司
- Filing Date
- 2025-06-11
- Publication Date
- 2026-06-23
AI Technical Summary
Coking plants face serious problems such as dust emission, low automation, and environmental and health hazards during the process of loading coke powder into transfer vehicles. In particular, uneven humidification and unstable manual operation exacerbate dust pollution, equipment corrosion, and increase the intensity of cleaning.
A more enclosed, intelligent, and efficient dust treatment terminal has been constructed. Through a physically enclosed dust collection and unloading room and an automatic sealing gate, combined with active negative pressure dust collection pipelines and dust collectors, the central control device realizes the automated control of dust receiving, temporary storage, humidification, and loading processes.
It significantly reduces dust pollution, mitigates equipment corrosion, reduces the intensity of manual cleaning, improves the working environment, enhances the stability and automation of dust handling, and protects the health of operators.
Smart Images
Figure CN224394127U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of industrial dust removal technology, and in particular to a dust emission recovery system for a coking plant dust silo. Background Technology
[0002] In the coking process, pulse-jet baghouse dust collectors are the core equipment for handling dust during coke oven discharge, dry quenching, coke loading, and coke transportation. The pulse-jet baghouse dust collector adsorbs dust-laden flue gas through negative pressure. After filtration through the bags and acid-base neutralization, the coke powder enters the ash storage tank via a pneumatic ash conveying system, and is finally moistened by a humidifying mixer before being loaded into a transfer vehicle. However, in related technologies, the large volume of coke powder and fluctuations in ash conveying pressure during the loading of the coke powder into the transfer vehicle result in uneven humidification, poor dust suppression, and a large amount of dust escaping from the ash discharge room. Furthermore, the adjustment of humidification water and ash volume relies on manual operation, leading to insufficient stability. Simultaneously, the open working environment exacerbates dust pollution and equipment corrosion, increasing the intensity of manual cleaning. Therefore, the process of discharging ash from the ash storage tank to the transfer vehicle presents problems such as severe dust dispersion, low automation, and environmental and health hazards. Utility Model Content
[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a dust emission recovery system for a coking plant dust silo, which constructs a more enclosed, intelligent, and efficient dust treatment end-stage, significantly reducing dust pollution, mitigating equipment corrosion, reducing the intensity of manual cleaning, and improving the working environment.
[0004] This application provides a dust emission recovery system for a coking plant dust removal ash silo, including: a dust removal ash unloading room, an ash silo operating platform, a dust removal ash storage tank, a dust collection pipeline, an automatic sealing gate, a dust humidification and mixing system, a dust removal butterfly valve, a fluid conveying control valve, a dust collector, and a control device;
[0005] The side wall of the dust removal ash unloading chamber is provided with mounting holes corresponding to the dust removal ash storage tank. The ash tank operating platform is located above the dust removal ash unloading chamber. The dust removal ash storage tank is set on the ash tank operating platform. One end of the dust collection pipeline is placed in the mounting 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 humidification and stirring system. A dust suction port is provided at one end of the dust collection pipeline in the dust removal ash unloading chamber. The fluid conveying control valve is located 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 unloading chamber.
[0006] The control device is connected to the automatic sealing gate, the dust humidification and stirring system, the dust removal butterfly valve, the fluid conveying control valve, and the dust collector, respectively. The automatic sealing gate is used to maintain the closed environment of the dust removal ash unloading room and automatically opens and closes when the dust transfer vehicle enters or exits the dust removal ash unloading room. The dust removal ash storage tank 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 transport of the dust to be treated in the dust removal ash storage tank to the dust collector via the fluid conveying control valve. In the humidification and mixing system, the control device is further used to control the dust humidification and mixing system to humidify and mix the dust to be treated to obtain wetted dust after the dust transfer vehicle enters the dust removal ash unloading room, and to transport the wetted dust to the dust transfer vehicle; the control device is also used to control the dust collection pipeline to suck up the dust in the dust removal ash unloading room by controlling the opening degree of the dust removal butterfly valve after the dust transfer vehicle enters the dust removal ash unloading room; the dust collection pipeline is also used to transport the sucked-up dust to the dust collector.
[0007] According to some embodiments of this application, the dust collector includes a filter bag assembly, a dust collector housing, and an induced draft fan. The filter bag assembly is disposed in the dust collector housing. The output end of the dust collection pipeline and the induced draft fan are both connected to the dust collector housing, and the dust collection pipeline and the induced draft fan are both connected to the interior of the dust collector housing.
[0008] According to some embodiments of this application, the bottom of the dust removal ash storage tank has an inverted triangular structure, and a vibrator is installed on the side wall of the bottom of the dust removal ash storage tank.
[0009] According to some embodiments of this application, the dust emission recovery system of the coking plant dust silo further includes an ash discharge pipeline. The input end of the ash discharge pipeline is connected to the output end of the dust ash storage tank, and the output end of the ash discharge pipeline extends into the dust ash unloading chamber. The dust humidification and stirring system is installed on the ash discharge pipeline, and the fluid conveying control valve is installed on the ash discharge pipeline, and the fluid conveying control valve is located near the output end of the dust ash unloading chamber.
[0010] According to some embodiments of this application, the dust humidification and stirring system includes a dust flow control valve, a dust humidification stirrer, and a humidification water assembly. The dust humidification stirrer is located inside the ash discharge pipe. The dust flow control valve and the humidification water assembly are both installed on the ash discharge pipe near the dust humidification stirrer. The dust flow control valve is located between the fluid delivery control valve and the dust humidification stirrer. The dust flow control valve, the dust humidification stirrer, and the humidification water assembly are all connected to the control device.
[0011] According to some embodiments of this application, the humidifying water assembly 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 agitator, and the humidifying water delivery pipeline is internally connected to the ash discharge pipeline. The humidifying water control pneumatic valve is installed on the humidifying water delivery pipeline and is located near the ash discharge pipeline. The humidifying water control pneumatic valve is connected to the control device.
[0012] According to some embodiments of this application, the control device is a PLC control system.
[0013] This application effectively curbs dust dispersion during critical loading stages through a dual approach of physical enclosure (dust collection and unloading chamber + automatic sealing gate) and active negative pressure collection (dust collection pipeline + dust collector). A central control device automates the entire process of dust reception, temporary storage, humidification, loading, and internal dust collection, reducing manual intervention and improving stability and uniformity. This setup creates a more enclosed, intelligent, and efficient dust treatment terminal, significantly reducing dust pollution, mitigating equipment corrosion, reducing manual cleaning intensity, and improving the working environment. Therefore, it effectively solves the problems of severe dust dispersion, low automation, and environmental and health hazards.
[0014] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0015] Additional aspects and advantages of this application will become apparent and readily understood in conjunction with the following description of the embodiments, in which:
[0016] Figure 1 A cross-sectional schematic diagram of the dust emission recovery system of the coking plant dust silo provided in the embodiment of this application;
[0017] Figure 2 This is a partial cross-sectional schematic diagram of the dust emission recovery system of the coking plant dust silo provided in the embodiments of this application.
[0018] Figure label:
[0019] Dust collection pipeline 110, dust removal butterfly valve 111;
[0020] Dust storage tank 210, vibrator 211, fluid conveying control valve 212, dust humidification and stirring system 220, dust flow control valve 221, dust humidification and stirring device 222;
[0021] Dust collector housing 300, filter bag assembly 310, induced draft fan 320. Detailed Implementation
[0022] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 this application, and should not be construed as limiting this application.
[0023] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application.
[0024] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.
[0025] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.
[0026] In the coking process, pulse-jet baghouse dust collectors are the core equipment for handling dust during coke oven discharge, dry quenching, coke loading, and coke transportation. The pulse-jet baghouse dust collector adsorbs dust-laden flue gas through negative pressure. After filtration through the bags and acid-base neutralization, the coke powder enters the ash storage tank via a pneumatic ash conveying system, and is finally moistened by a humidifying mixer before being loaded into a transfer vehicle. However, in related technologies, the large volume of coke powder and fluctuations in ash conveying pressure during the loading of the coke powder into the transfer vehicle result in uneven humidification, poor dust suppression, and a large amount of dust escaping from the ash discharge room. Furthermore, the adjustment of humidification water and ash volume relies on manual operation, leading to insufficient stability. Simultaneously, the open working environment exacerbates dust pollution and equipment corrosion, increasing the intensity of manual cleaning. Therefore, the process of discharging ash from the ash storage tank to the transfer vehicle presents problems such as severe dust dispersion, low automation, and environmental and health hazards.
[0027] Reference Figures 1 to 2This application provides a dust removal system for an ash discharge chamber, including a dust removal ash unloading chamber, an ash hopper operating platform, a dust removal ash storage tank 210, a dust collection pipeline 110, an automatic sealing gate, a dust humidification and mixing system 220, a dust removal butterfly valve 111, a fluid conveying control valve 212, a dust collector, and a control device. The side wall of the dust removal ash unloading chamber has mounting holes corresponding to the dust removal ash storage tank 210. The ash hopper operating platform is located above the dust removal ash unloading chamber, and the dust removal ash storage tank 210 is mounted on the ash hopper operating platform. One section of the dust collection pipeline 110... One end of the dust collection pipe 110 is placed in the mounting hole, and the other end of the dust collection pipe 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 collection ash storage tank 210, and the output end of the dust collection ash storage tank 210 is connected to the input end of the dust humidification and mixing system 220. A dust suction port is provided at one end of the dust collection pipe 110 located in the dust collection ash unloading chamber. A fluid conveying control valve 212 is located at the output end of the dust collection ash storage tank 210. A dust collection butterfly valve 111 is installed in the dust collection pipe 110, and the dust collection butterfly valve 111 is located between the dust suction port and the dust collector. An automatic sealing gate is installed at the entrance of the dust removal ash unloading room; the control device is connected to the automatic sealing gate, the dust humidification and mixing system 220, the dust removal butterfly valve 111, the fluid conveying control valve 212, and the dust collector; the automatic sealing gate is used to maintain the closed environment of the dust removal ash unloading room and automatically opens and closes when the dust transfer vehicle enters and exits the dust removal ash unloading 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 amount of dust to be treated in the dust removal ash storage tank 210 through the fluid conveying control valve 212. The dust is transported to the dust humidification and mixing system 220. The control device is also used to control the dust humidification and mixing system 220 to humidify and mix the dust to be processed after the dust transfer vehicle enters the dust removal ash unloading room, so as to obtain wet dust and transport the wet dust to the dust transfer vehicle. The control device is also used to control the dust collection pipeline 110 to suck up the dust in the dust removal ash unloading room by controlling the opening degree of the dust removal butterfly valve 111 after the dust transfer vehicle enters the dust removal ash unloading room. The dust collection pipeline 110 is also used to transport the sucked dust to the dust collector.
[0028] In some embodiments, a 750x750mm hole is drilled in the existing dust removal ash unloading room and ash discharge room to install a φ712mm dust removal pipe. The lowest end of the dust removal pipe is 3.6 meters above the ground to ensure that the dust removal pipe does not affect the normal passage of ash discharge vehicles. At the same time, the vehicle inlet is sealed. The dust removal butterfly valve is located at a height of 11.9 meters on the ash silo platform. The dust removal butterfly valve is used to adjust the air volume of the pipe and control the negative pressure intensity of the ash discharge room.
[0029] Specifically, the dust removal system in the ash discharge room set up in this application has the following functions: (1) fundamentally solves the problem of dust dispersion: ① closed environment: by setting up a special dust removal ash unloading room and installing an automatic sealing gate at its entrance, the system is completely closed when the dust transfer vehicle does not enter or exit, physically blocking the main channel for dust dispersion to the external environment. The automatic opening and closing of the gate also reduces the risk of poor sealing or forgetting to close due to manual operation; ② actively collects dispersed dust: a dust suction port is set on the side wall of the unloading 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 in the closed unloading room (even if dust is raised), the control device can open the dust removal butterfly valve 111 and actively suck and collect the dust in the air in the unloading room by using the negative pressure of the dust collector. The collected dust is then sent back to the dust storage tank 210 for processing, forming a closed loop, which greatly reduces the accumulation of dust inside the unloading room and the chance of dust escaping to the outside. The opening control of the dust removal butterfly valve 111 allows the system to precisely adjust the suction force according to the dust situation. (2) Significantly improve the degree of automation: ① Core control center: The control device serves as the core, connecting and coordinating the automatic sealing gate, dust humidification and stirring system 220, dust removal butterfly valve 111, fluid conveying control valve 212 and dust collector. This realizes 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 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 dust humidification and stirring. The operation of the mixing system 220 can precisely control the amount of water added, the mixing time and intensity, ensuring uniform humidification and reducing the phenomenon of dry ash or excessive wetness caused by unstable manual operation; ④ Dust collection process control: The control device automatically controls the intensity of dust suction in the unloading room by adjusting the opening of the dust removal butterfly valve 111; ⑤ Environmental enclosure control: The opening and closing of the automatic sealing gate is also managed by the control device to ensure that the unloading room remains closed when not in operation; ⑥ Reduced reliance on manual operation: The above-mentioned automation functions significantly reduce the reliance on manual adjustment of water volume, ash volume, ventilation and door opening and closing operations, and improve the stability and consistency of system operation.(3) Effectively reduce environmental and health hazards: ① Dust control at the source: The enclosed unloading room and the efficient internal dust collection system greatly reduce the emission of dust into the external atmosphere during operation, improving the air quality of the workplace and surrounding environment; ② Reduce equipment corrosion: Reduced dust emission means that the amount of dust deposited on the equipment (especially the equipment in and near the unloading room) is greatly reduced, thereby slowing down the corrosion rate of the equipment by dust (especially potentially corrosive coke powder); ③ Reduce cleaning intensity: The dust inside the unloading room is effectively collected and treated, and no longer accumulates in large quantities on the walls, floors and equipment, significantly reducing the area and workload that needs to be manually cleaned later; ④ Protect personnel health: The risk of workers being exposed to high-concentration dust environments is greatly reduced, especially in the key link of loading dust transfer vehicles, improving occupational health conditions. (4) Optimized process and structure: ① Buffer and temporary storage: The dust collection tank 210 is clearly defined as a container for receiving and temporarily storing the dust to be treated from the dust collector, providing a buffer that may help stabilize the impact of ash conveying pressure fluctuations on the downstream humidification process (although the claims do not directly describe pressure regulation, the buffering effect itself contributes to stability); ② Reasonable spatial layout: The ash tank operating platform is located above the dust collection ash unloading room, and the dust collection tank 210 is placed on it. The dust collection pipeline 110 is connected to the dust collector from the installation holes on the side wall of the unloading room. This layout is compact and conducive to the directional flow and collection of dust; ③ Closed-loop treatment: The dust collected by the dust collection pipeline 110 is not directly discharged, but sent back to the dust collector (or eventually enters the storage tank), which reflects the concept of resource recycling and environmental protection.
[0030] This application effectively curbs dust dispersion during critical loading stages through a dual approach of physical enclosure (dust collection and unloading chamber + automatic sealing gate) and active negative pressure collection (dust collection pipeline 110 + dust collector). A central control device automates the entire process of dust reception, temporary storage, humidification, loading, and internal dust collection, reducing manual intervention and improving stability and uniformity. This setup creates a more enclosed, intelligent, and efficient dust treatment terminal, significantly reducing dust pollution, mitigating equipment corrosion, reducing manual cleaning intensity, and improving the working environment. Therefore, it effectively solves the problems of severe dust dispersion, low automation, and environmental and health hazards.
[0031] Reference Figure 1 It is understood that the dust collector includes a filter bag assembly 310, a dust collector housing 300, and an induced draft fan 320. The filter bag assembly 310 is located in the dust collector housing 300. The output end of the dust collection pipe 110 and the induced draft fan 320 are both connected to the dust collector housing 300, and the dust collection pipe 110 and the induced draft fan 320 are both connected to the interior of the dust collector housing 300.
[0032] It should be noted that the functions of the dust collector are: (1) Circulating and collecting scattered dust: The induced draft fan 320 forms a negative pressure in the dust collector box 300, and the dust scattered in the ash discharge room is drawn into the dust collector through the dust collection pipeline 110. The dust is then filtered twice by the filter bag assembly 310 to achieve the circulating collection of dust; (2) Maintaining the stability of the negative pressure of the system: The induced draft fan 320 and the dust collection pipeline 110 work together to ensure that the ash discharge room is continuously in a negative pressure state to prevent dust from overflowing; (3) Reusing existing equipment: The filter bag assembly 310 and box structure of the original pulse bag dust collector are directly used to reduce the cost of modification.
[0033] Reference Figure 1 and Figure 2 It is understandable that the bottom of the dust removal ash storage tank 210 has an inverted triangular structure, and a vibrator 211 is installed on the side wall of the bottom 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 storage tank 210.
[0035] It should be noted that the bottom of the dust collection tank 210 has an inverted triangular structure. The inverted triangular structure uses gravity to concentrate the coke powder, avoids dust accumulation or blockage at the bottom of the dust collection unloading chamber, and promotes the smooth falling of coke powder. The vibrator 211 breaks up the attached agglomerates of coke powder through periodic vibration, ensuring that the dust enters the ash discharge pipeline evenly and continuously, and preventing dust caking. The vibrator 211 is controlled by a control device to start and stop, and is linked with the ash discharge valve to reduce manual intervention.
[0036] Understandably, the dust removal system in the ash discharge room also includes an ash discharge pipeline. The input end of the ash discharge pipeline is connected to the output end of the dust ash storage tank 210. The output end of the ash discharge pipeline extends into the dust ash unloading room. The dust humidification and mixing system 220 is installed on the ash discharge pipeline. The fluid conveying control valve 212 is installed on the ash discharge pipeline, and the fluid conveying control valve 212 is set close to the output end of the dust ash unloading room.
[0037] It should be noted that the dust humidification and mixing system 220 is directly integrated into the ash discharge pipeline, so that the coke powder is humidified and mixed synchronously during the transportation process, suppressing dust dispersion during unloading and realizing integrated humidification and dust suppression; the fluid conveying control valve 212 (ash discharge valve) and the flat valve (dust flow control valve 221) work together to adjust the ash amount through the control device to ensure humidification uniformity and realize precise control of dust flow; the ash discharge pipeline extends into the closed dust removal ash unloading room, and in conjunction with the automatic sealing gate, a negative pressure environment is formed to prevent dust leakage.
[0038] Reference Figure 2It is understood that the dust humidification and mixing system 220 includes a dust flow control valve 221, a dust humidification mixer 222, and a humidification water assembly. The dust humidification mixer 222 is located inside the ash discharge pipe. The dust flow control valve 221 and the humidification water assembly are both installed on the ash discharge pipe near the dust humidification mixer 222. The dust flow control valve 221 is located between the fluid conveying control valve 212 and the dust humidification mixer 222. The dust flow control valve 221, the dust humidification mixer 222, and the humidification water assembly are all connected to the control device.
[0039] It should be noted that the dust flow control valve 221 (i.e., flat plate valve) is located downstream of the fluid conveying control valve 212 (ash discharge valve), directly regulating the amount of dust entering the agitator to avoid excessive ash leading to uneven humidification or blockage; the dust humidifying agitator 222 is built into the ash discharge pipeline, allowing dust and water to mix instantly during the conveying process, reducing the chance of dust escaping in the pipeline; all components are uniformly controlled by the control device to achieve synchronous operation of dust flow, humidification water volume, and agitation start and stop, replacing manual intervention and solving the problem of "uneven humidification"; through the close proximity layout (dust flow control valve 221 and humidification water components are close to the agitator), it is ensured that the dust is immediately humidified after entering the agitator, suppressing dust emission.
[0040] It is understood that the humidifying water assembly 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 222, and the humidifying water delivery pipeline is internally connected to the ash discharge pipeline. The humidifying water control pneumatic valve is installed on the humidifying water delivery pipeline and is located near 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 a control device, which dynamically adjusts the water volume according to the dust flow rate to avoid clumping or dust generation caused by excessive moisture or dryness; the humidifying water delivery pipeline is directly connected to the side wall of the ash discharge pipeline, accurately injecting water into the dust flow location to ensure full contact between water and dust in the agitator; the humidifying water control pneumatic valve is installed "close to the ash discharge pipeline" to shorten the water circuit response time, instantly opening and closing the water source when dust enters the agitator, reducing equipment corrosion caused by water residue; the water circuit and the ash discharge pipeline are internally connected, and the entire process is a closed operation to prevent secondary leakage during the water addition process.
[0042] In some embodiments, the inlet of the humidifying water delivery line is connected to a water tank.
[0043] It is understandable that the control device is a PLC control system.
[0044] For example, the dust transfer vehicle is a dump truck, and the control flow of the PLC control system is as follows: Step 1: Start; Step 2: Determine whether the distance between the rear of the dust transfer vehicle and the automatic sealing gate (i.e., the roller shutter door of the dust removal unloading room) is less than or equal to 50 cm. If the distance is less than or equal to 50 cm, proceed to Step 3; if the distance is greater than 50 cm, the automatic sealing gate automatically closes, and return to Step 1; Step 3: Automatically open the automatic sealing gate. Step 4: The dust transfer truck reverses into the warehouse. Determine if the distance between the rear of the dust transfer truck and the rear wall of the dust collection and unloading area is between 60 and 80 cm. If the distance is between 60 and 80 cm, the vehicle stops, and Step 5 is executed. If the distance is less than 60 cm, an alarm and shutdown control are activated. When the distance to the rear wall of the ash unloading room is greater than 80cm, the dust humidification and mixing system 220 is automatically shut off; Step 5: The dust humidification and mixing system 220 is automatically turned on; Step 6: The DN700 dust collector butterfly valve 111 of the dust collector unloading room is automatically opened simultaneously; Step 7: After 5 seconds, the humidification water control pneumatic valve, fluid conveying control valve 212, and dust flow control valve 221 are opened simultaneously; Step 8: The vibrator 211 is automatically turned on after an interval of 5 seconds; Step 9: When the dust transfer vehicle finishes unloading ash, the alarm bell sounds, and the dust collector unloading... The dust discharge process in the material storage area proceeds from top to bottom, shutting down the vibrator 211, dust flow control valve 221, fluid conveying control valve 212, humidifying water control pneumatic valve, humidifying agitator, and DN700 dust removal butterfly valve 111 every 5 seconds. Step 10: The dust transfer vehicle starts and leaves the dust discharge area. When the distance between the rear of the dust transfer vehicle and the rear wall of the dust removal ash unloading area is less than 60cm, an alarm and shutdown control is activated. When the distance between the rear of the dust transfer vehicle and the rear wall of the dust removal ash unloading area is greater than 80cm, the dust humidifying and agitating system 220 is automatically shut down.
[0045] It should be noted that the function of the dust collection duct is to connect the ash discharge chamber and the dust collector housing 300, allowing the dust escaping from the ash discharge chamber to be re-inhaled into the dust collection system for recycling. The opening position (3.6m above the ground) ensures vehicle passage and forms a closed negative pressure space. The DN700 dust collector butterfly valve 111 addresses the pressure fluctuation problem in the ash storage and unloading chamber by controlling its opening degree. The function of the dust collector butterfly valve 111 is to regulate the airflow in the duct, balance the negative pressure between the ash discharge chamber and the main dust collection system, and ensure efficient dust collection. The automatic sealing gate ( The roller shutter door is interlocked with the vehicle position sensor (opens when the distance is ≤50cm). The automatic sealing gate automatically opens and closes when vehicles enter or exit, maintaining a sealed environment in the ash storage room and preventing negative pressure leakage. The vibrator 211 at the bottom of the dust collector 210 forces material to fall, avoiding blockage. The function of the dust collector 210 is to temporarily store the coke powder collected by the dust collector. The inverted triangular structure, together with the vibrator 211, prevents ash accumulation and caking. The function of the ash discharge pipeline is to connect the ash storage tank and the humidification and mixing system, and to transport the coke powder to the mixer. Fluid conveying control valve 212 (ash discharge valve): controls ash output; Dust flow control valve 221 (flat valve): precisely adjusts the dust flow rate entering the agitator; Dust humidifying agitator 222: forces coke powder and humidifying water to form wet dust and suppress dust; Humidifying water component: precisely regulates the water injection volume through the humidifying water control pneumatic valve to achieve automated ash-water ratio; Core functions of PLC control system: (1) Timing control: link roller shutter door, butterfly valve, vibrator 211, valve start and stop (e.g., the equipment is shut down step by step 5 seconds after ash discharge ends); (2) Interlock protection: trigger alarm or shutdown when the vehicle position is abnormal (<60cm or >80cm from the rear wall); (3) Parameter optimization: dynamically adjust the butterfly valve opening according to the negative pressure data to ensure stable dust collection.
[0046] This application achieves closed-loop collection by re-entering the dust collector through a newly added pipeline for dust escaping from the ash discharge room. Stable negative pressure is created by adjusting the air volume using a butterfly valve and a sealed space. The PLC replaces manual adjustment of water / ash volume to eliminate uneven humidification. Vehicle positioning and equipment start / stop are interlocked to prevent misoperation.
[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0048] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.
[0049] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A dust emission recovery system for a coking plant ash silo, characterized in that, include: Dust removal ash unloading room, ash hopper operating platform, dust removal ash storage tank, dust collection pipeline, automatic sealing gate, dust humidification and mixing system, dust removal butterfly valve, fluid conveying control valve, dust collector and control device; The side wall of the dust removal ash unloading chamber is provided with mounting holes corresponding to the dust removal ash storage tank. The ash tank operating platform is located above the dust removal ash unloading chamber. The dust removal ash storage tank is set on the ash tank operating platform. One end of the dust collection pipeline is placed in the mounting 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 humidification and stirring system. A dust suction port is provided at one end of the dust collection pipeline in the dust removal ash unloading chamber. The fluid conveying control valve is located 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 unloading chamber. The control device is connected to the automatic sealing gate, the dust humidification and stirring system, the dust removal butterfly valve, the fluid conveying control valve, and the dust collector, respectively. The automatic sealing gate is used to maintain the closed environment of the dust removal ash unloading room and automatically opens and closes when the dust transfer vehicle enters or exits the dust removal ash unloading room. The dust removal ash storage tank 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 transport of the dust to be treated in the dust removal ash storage tank to the dust collector via the fluid conveying control valve. In the humidification and mixing system, the control device is further used to control the dust humidification and mixing system to humidify and mix the dust to be treated to obtain wetted dust after the dust transfer vehicle enters the dust removal ash unloading room, and to transport the wetted dust to the dust transfer vehicle; the control device is also used to control the dust collection pipeline to suck up the dust in the dust removal ash unloading room by controlling the opening degree of the dust removal butterfly valve after the dust transfer vehicle enters the dust removal ash unloading room; the dust collection pipeline is also used to transport the sucked-up dust to the dust collector.
2. The dust emission recovery system for the coking plant dust silo according to claim 1, characterized in that, The dust collector includes a filter bag assembly, a dust collector housing, and an induced draft fan. The filter bag assembly is located in the dust collector housing. The output end of the dust collection pipeline and the induced draft fan are both connected to the dust collector housing, and the dust collection pipeline and the induced draft fan are both connected to the interior of the dust collector housing.
3. The dust emission recovery system for the coking plant dust silo according to claim 1, characterized in that, The bottom of the dust removal ash storage tank has an inverted triangular structure, and a vibrator is installed on the side wall of the bottom of the dust removal ash storage tank.
4. The dust emission recovery system for the coking plant dust silo according to claim 1, characterized in that, The dust emission recovery system of the coking plant dust silo also includes an ash discharge pipeline. The input end of the ash discharge pipeline is connected to the output end of the dust ash storage tank. The output end of the ash discharge pipeline extends into the dust ash unloading chamber. The dust humidification and stirring system is installed on the ash discharge pipeline. The fluid conveying control valve is installed on the ash discharge pipeline and is located near the output end of the dust ash unloading chamber.
5. The dust emission recovery system for the coking plant dust silo according to claim 4, characterized in that, The dust humidification and mixing system includes a dust flow control valve, a dust humidification mixer, and a humidification water assembly. The dust humidification mixer is located inside the ash discharge pipe. The dust flow control valve and the humidification water assembly are both installed on the ash discharge pipe near the dust humidification mixer. The dust flow control valve is located between the fluid delivery control valve and the dust humidification mixer. The dust flow control valve, the dust humidification mixer, and the humidification water assembly are all connected to the control device.
6. The dust emission recovery system for the coking plant dust silo according to claim 5, characterized in that, The humidifying water assembly 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 agitator, and the humidifying water delivery pipeline is internally connected to the ash discharge pipeline. The humidifying water control pneumatic valve is installed on the humidifying water delivery pipeline and is located near the ash discharge pipeline. The humidifying water control pneumatic valve is connected to the control device.
7. The dust emission recovery system for a coking plant dust silo according to claim 5, characterized in that, The control device is a PLC control system.