4 gravitational settling chamber

صفحه 1:
Gravitational settling chamber Settling Chamber o Used to remove particles with size greater than 50 pm. 0 Velocity of flue gas reduced in large chamber. 0 Particles settle under gravitational force. 0 The particulate matter is settled by its Anum xroinht ‏مخ هم وم یوم[ ریما‎ tho flaa crac 

صفحه 2:
نمایی از ته نشین کننده های ثقلی 

صفحه 3:
lows ‏راه‎ * در لین روش از صفحات راه بند.به منظور کاهش سرعت ذرات و ته نشینی آنها استفاده می شود. * راه بندها می توانند به دو صورت تر و خشک مورد استفاده قرار گیرد. در هنگام کاربرد راه بندهای تر علاوه بر ذرات» برخی گازهای آلاینده نیز حذف می گردند. 

صفحه 4:
نمونه هایی از راه بندها _— سب 

صفحه 5:
‎hV/L eq- i‏ < و۱۷ ‎L= length of chamber ‎V= horizontal velocity of carrier gas ‎Vs= settling velocity of particulates ‎h= height through which particulates travel before settling down 

صفحه 6:
By stokes law Vs= g(p,- p)D?/18p (ii) eq- ii D= diameter of particle g= acceleration due to gravity p,= density of particle p = density of gas p= viscosity of gas 

صفحه 7:
From eq- i and ii D= [18Vhp/ Lg (p,- p)1"” D = is minimum size of particle that can be removed in a settling chamber 

صفحه 8:
Advantages 0 Low initial cost. 0 Easy to design. 0 Low pressure drop. o Low maintenance cost. o Dry and continuous disposal of solid particulates. Disadvantages o Require large space. 0 Less collection efficiency. 0 Only larger size particles can be collected. 

صفحه 9:
Application ۵ Industrial application is limited. 0 Used widely for removal of large solid particulates from draft furnace, kilns. o Sometimes used in process industry, food and metallurgical industry. 0 Used as pre-cleaners for high efficiency collectors. o Require simple maintenance 

Gravitational settling chamber o Used to remove particles with size greater than 50 μm. o Velocity of flue gas reduced in large chamber. o Particles settle under gravitational force. o The particulate matter is settled by its نمایی از ته نشین کننده های ثقلی راه بندها • در این روش از صفحات راه بند به منظور کاهش سرعت ذرات و ته نشینی آنها استفاده می شود. • راه بندها می توانند به دو صورت تر و خشک مورد استفاده قرار گیرد. • در هنگام کاربرد راه بندهای ت ر عالوه بر ذرات ،برخی گازهای آالینده نیز حذف می گردند. نمونه هایی از راه بندها Vs= hV/L eq- i L= length of chamber V= horizontal velocity of carrier gas Vs= settling velocity of particulates h= height through which particulates travel before settling down By stokes law Vs= g(ρp- ρ)D2/18μ (ii) eq- ii D= diameter of particle g= acceleration due to gravity ρp= density of particle ρ = density of gas μ= viscosity of gas From eq- i and ii D= [18Vhμ/ Lg (ρp- ρ)]1/2 D = is minimum size of particle that can be removed in a settling chamber Advantages o Low initial cost. o Easy to design. o Low pressure drop. o Low maintenance cost. o Dry and continuous disposal of solid particulates. Disadvantages o Require large space. o Less collection efficiency. o Only larger size particles can be collected. Application o Industrial application is limited. o Used widely for removal of large solid particulates from draft furnace, kilns. o Sometimes used in process industry, food and metallurgical industry. o Used as pre-cleaners for high efficiency collectors. o Require simple maintenance