Coking Plant Dust CollectorWorking Principle
The Main Pollution Points Of The Coking Plant, Including The Organic Side Furnace Door, Coke Side Furnace Door, And Furnace Top, Are Treated By Ground Dust Removal Stations In The Coal Preparation Workshop, Which Is Also The Crusher. Ordinary Bag Pulse Generators Are Used To Treat The Coal Washing Workshop, Which Is The Same As The Coal Preparation Workshop. Due To The High Moisture Content In The Coke Screening Building, Water Can Be Used To Remove It, Or Plastic Burning Plates Can Be Used For Dust Removal.
Dust Collectors In Coking Plants Generally Use Cloth Dust Removal Method. The Dust Containing Gas Sucked From The Dust Hood Of The Coal Loading Truck Enters The Dust Collector And Is Filtered By Filter Bags. The Dust And Gas Are Separated And Fall Into The Ash Hopper. Due To The Special Characteristics Of Coke Oven Flue Gas, The Dust Viscosity Is High, And It Is Easy To Form Bridges And Stick Walls In The Ash Hopper. Especially For Ash Hoppers With Poor Insulation System Treatment, The Problem Of Ash Blockage Is Even More Serious.
The Dust Collector In The Coking Plant Adopts The Domestic Non Combustion Method Of Coal Loading, And The Collected Coal Loading Dust Enters The Coal Side Dust Removal Dry Dust Removal Ground Station For Coal Loading Dust Removal Technology. It Realizes The Capture Of Coal Loading Smoke And Dust, The Transfer Of Flue Gas From The Furnace Top And Ground Station, The Regulation And Control Of Flue Gas Temperature, And The Integration Of Flue Gas Purification. It Uses The Coke Powder Collected On The Surface Of The Filter Bag During The Pushing Process To Prevent The Smoke And Dust From Containing Tar And Water Vapor From Sticking To The Filter Bag During The Coal Loading Process, Protecting The Long-term Safe And Stable Operation Of The Equipment.
The Significant Characteristics Of The Dust Collector In The Coking Plant Are As Follows:
(1) It Has A Secondary Spark Separation Function. We Know That Coke Ovens Generate A Large Amount Of High-temperature And Sparking Dust During The Coking Process. If This Dust Is Not Cooled And Sparks Enter The Bag Filter, It Will Cause Combustion And Explosion. In Order To Reduce The Temperature Of Dust And Minimize Open Flames, A Cooler Is Installed Before The Dust Collector In The Dust Removal System. Before Entering The Bag Filter, The Dust Is Cooled And Sparks Are Separated By A Cooler. In Addition To Quickly Cooling High-temperature Dust, The Thermal Storage Cooler Also Has The Function Of Extinguishing Sparks In The Cooling Process By Passing The Dust With Sparks Through The Cooler. However, Residual Sparks Still Enter The Bag Filter With The Dust. The Flame Retardant Pulse Dust Collector Is Designed With A Flame Retardant Partition Structure. The Dust With Residual Sparks Entering The Dust Collector Is First Obstructed By The Flame Blocking Partition, Which Blocks The Open Flame And Achieves Secondary Separation. It Then Directly Enters The Ash Bin Without Coming Into Contact With The Bag, Posing A Risk Of Bag Explosion. This Structural Form Of Adding Barrier Plates And Secondary Separation Of Sparks Is Not Available In Other Pulse Dust Collectors.
(2) The Dust Undergoes Secondary Separation, Which Improves The Service Life Of The Filter Bag. Another Characteristic Of Coke Oven Flue Gas Dust Is Its Hardness And Sharp Surface. This Is Especially True For Larger Particle Sizes Of Coke Powder. However, These Larger Particles Of Dust And Dust With Residual Sparks Are Separated By The Barrier Plate And Directly Fall Into The Ash Bin, While The Smoke Particles Entering The Bag Are Very Fine, Which Improves The Service Life Of The Filter Bag. In The Past Six Months Or So, The Bag Needs To Be Replaced, And With This Structure, The Service Life Of The Filter Bag Can Reach More Than 1.5 Years. There Is Usually No Problem For Two Years.
(3) By Using A Central Box For Air Intake, The Flue Gas Flows Evenly Through The Split Plate, Which Not Only Improves The Filtration Efficiency But Also Prevents The Generation Of Reverse Airflow During Ash Cleaning, Thus Enhancing The Ash Cleaning Effect.
(4) Due To The Explosive Nature Of The Coke Oven Dust Collector, In Addition To The Above Structure, Reinforcement Ribs Are Also Installed On The Dust Collector Box Plate In The Structural Form. At The Same Time, Each Chamber Is Designed As An Independent And Completely Separated Structure To Reduce The Probability Of Hidden Dangers And Improve The Dust Removal Effect Of The Collector. Due To The Nature Of Coke Oven Dust, The Dust Collector Design Adopts The Above Structure, Making The Flame Retardant Pulse Dust Collector Have Both Properties And Adaptability, And Therefore Widely Used In The Ground Dust Removal System Of Coking Plants.
Process Flow Of Dust Collector In Coking Plant:
The Large Amount Of High-temperature Dusty Flue Gas From The Coke Oven Is Captured By The Large Suction Hood On The Coke Guide Groove, And Then Enters The Main Dust Collection Pipe Through The Interface Flap Valve. It Is Sent To The Regenerative Cooler For Cooling And Then Enters The Bag Filter For Purification. The Purified Flue Gas Is Discharged Into The Atmosphere Through Fans, Mufflers, And Chimneys. After The Dusty Gas Enters From The Inlet Of The Bag Filter, It Enters Each Unit Room Through The Guide Pipe. Under The Action Of The Guide Equipment, Large Particles Of Dust Fall Directly Into The Ash Hopper, While Other Dust Enters The Filtering Area Of Each Compartment Uniformly With The Airflow. The Filtered Clean Gas Passes Through The Filter Bag And Is Discharged Through The Upper Box, Progress Valve, And Exhaust Pipe.
As The Filtration Process Progresses, When The Dust On The Surface Of The Dust Removal Bag Reaches The Thickness, The Cleaning Control Equipment (differential Pressure Or Timing, Manual Control) Will Close The Progress Valve According To The Set Program, Control The Unit Offline At That Time, And Open The Electromagnetic Pulse Valve To Blow And Shake Off The Dust On The Filter Bag. The Dust Falling Into The Ash Hopper Is Discharged Through The Discharge Valve And Sent Out Through The Ash Conveying System. The Dust Captured By The Bag Filter And Cooler Enters The Scraper Conveyor Through The Pneumatic Double-layer Ash Discharge Valve, And Is Then Sent To The Dust Bin By The Bucket Type Progressive Machine. The Dust Is Loaded Into The Car And Transported Out By The Humidifying Ash Unloader On Time. To Save Electricity, A Speed Regulating Hydraulic Coupling Is Installed Between The Ventilation Fan And The Motor. The Signal Is Transmitted To The Above Ground Control System Of The Dust Removal Station Through The Motor Channel. When The Ventilation Fan Changes From Low Speed To High Speed, It Generates A Large Suction Force, Which Draws The Dust To The Removal Station For Processing. After Pushing The Coke, The Coupling Spoon Tube Changes From High Position To Low Position, And The Fan Changes From High Speed To Low Speed.
