초록 ▼

An antifouling window assembly in a duct gas monitoring system comprises a mixing chamber positioned between a duct opening and a window unit. Purge gas is introduced into the mixing chamber through an inlet located adjacent the window unit. The velocity of the purge gas is such that laminar flow is

An antifouling window assembly in a duct gas monitoring system comprises a mixing chamber positioned between a duct opening and a window unit. Purge gas is introduced into the mixing chamber through an inlet located adjacent the window unit. The velocity of the purge gas is such that laminar flow is established along the surface of the window unit. The purge gas circulates within the chamber and passes into the duct through the duct opening to mix with duct gases and deflect the gases from the mixing chamber.

대표청구항 ▼

In a duct gas monitoring system including window means for viewing duct gases through a duct opening, wherein there is a tendency for the window means to become fouled by particulate matter in said gases, an antifouling window assembly comprising a housing having an open end mounted on said duct at

In a duct gas monitoring system including window means for viewing duct gases through a duct opening, wherein there is a tendency for the window means to become fouled by particulate matter in said gases, an antifouling window assembly comprising a housing having an open end mounted on said duct at the duct opening, said housing having a cross sectional area greater than the cross sectional area of said duct opening and defining a circulation chamber means; inlet means for supplying a purge gas into said housing at a flow velocity to provide substantially laminar gas flow along a surfact of said window means, said housing including a divider plate for dividing said chamber means into a first chamber adjacent said window means and a second chamber adjacent said duct opening, said divider plate containing an an orifice located on a viewing axis, said purge gase circulating successively within said first and second chambers before passing into said duct through the duct opening to mix with the duct gases.