Catalytic CombustionTreating Waste Gas From Sewage Treatment Plants
Characteristics Of Waste Gas From Sewage Treatment Plants
During The Production Process Of Petrochemical Enterprises, Wastewater Treatment Plants Also Emit Some Waste Gases. The Exhaust Gas Discharged From The Sewage Treatment Plant Contains Sufficient Oxygen, While The Flow Rate And Concentration Fluctuate Greatly. The Exhaust Gas Emitted From Front-end Structures Such As Flotation Tanks And Oil Separators Contains A Large Amount Of Non Methane Total Hydrocarbons, So Catalytic Combustion Technology Can Be Directly Used For Treatment. However, There Are Only A Small Amount Of Non Methane Total Hydrocarbons In The Exhaust Gas Emitted From Back-end Structures Such As Biochemical Tanks And Aeration Tanks. If Catalytic Treatment Technology Is Directly Used, It Requires High Energy Consumption. Therefore, Adsorption Concentration Is Needed For Pretreatment Before Catalytic Combustion Technology Can Be Used.
Process Flow
The VOCs Waste Gas Emitted From Front-end Structures Such As Flotation Tanks And Oil Separators Enters The Desulfurization Tank Through Catalytic Fans And Flame Arresters. Then, The Desulfurization Tank Uses Desulfurization Adsorbents To Remove Inorganic Sulfur And Sulfur From The VOCs Waste Gas. After Desulfurization Treatment, The VOCs Waste Gas Enters The Homogenization Tank, Where The Homogenization Agent Can Homogenize The Total Hydrocarbon Concentration Of The VOCs Waste Gas And Prevent Impact On The Catalytic Combustion Reactor. Then Mix The Homogenized And Sulfurized VOCs Exhaust Gas In The Air, So That It Can Meet The Conditions For Catalytic Combustion Reaction. By Passing VOCs Exhaust Gas Through A Filter To Remove Particulate Matter, It Can Be Discharged.
Control Of Catalytic Combustion Reaction
In Order To Ensure The Smooth Progress Of Catalytic Combustion Reaction, Some Parameters Need To Be Controlled. The Control Is The Outlet Temperature Of The Catalytic Combustion Reactor, And The Control Measure Is To Regulate The Air Volume. If The Outlet Temperature Of The Catalytic Combustion Reactor Exceeds The Set Value, It Is Necessary To Increase The Opening Of The Air Inlet Regulating Valve To Increase The Air Volume, Which Can Reduce The Temperature Of The Catalytic Combustion Reactor. If The Outlet Temperature Of The Catalytic Combustion Reactor Is Lower Than The Set Value, It Is Necessary To Reduce The Opening Of The Air Inlet Regulating Valve To Decrease The Air Volume, So As To Increase The Temperature Of The Catalytic Combustion Reactor. Secondly, The Inlet Temperature Of The Catalytic Combustion Reactor Is Controlled By Adjusting The Output Power Of The Electric Heater. If The Inlet Temperature Of The Catalytic Combustion Reactor Is Higher Than The Set Value, It Is Necessary To Reduce The Output Power Of The Electric Heater, So That The Inlet Temperature Of The Catalytic Combustion Reactor Will Decrease. If The Inlet Temperature Of The Catalytic Combustion Reactor Is Lower Than The Set Value, It Is Necessary To Increase The Output Power Of The Electric Heater, So That The Inlet Temperature Of The Catalytic Combustion Reactor Will Rise. If There Is A Malfunction Of The Electric Heater, High Internal Temperature Of The Electric Heater, High Outlet Temperature Of The Catalytic Combustion Reactor, Or High Inlet Temperature Of The Catalytic Combustion Reactor, An Interlock Will Be Triggered, And The Electric Heater Will Be Turned Off, The Air Valve Will Be Fully Opened, And The Exhaust Gas Will Be Cut Off From The Device.
