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A metered dose inhaler having part or all of its internal surfaces coated with one or more fluorocarbon polymers, optionally in combination with one or more non-fluorocarbon polymers, for dispensing an inhalation drug formulation comprising beclomethasone dipropionate or a physiologically acceptable

A metered dose inhaler having part or all of its internal surfaces coated with one or more fluorocarbon polymers, optionally in combination with one or more non-fluorocarbon polymers, for dispensing an inhalation drug formulation comprising beclomethasone dipropionate or a physiologically acceptable solvate thereof, and a fluorocarbon propellant, optionally in combination with one or more other pharmacologically active agents or one or more excipients.

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A metered dose inhaler having part or all of its internal surfaces coated with one or more fluorocarbon polymers, optionally in combination with one or more non-fluorocarbon polymers, for dispensing an inhalation drug formulation comprising beclomethasone dipropionate or a physiologically acceptable

A metered dose inhaler having part or all of its internal surfaces coated with one or more fluorocarbon polymers, optionally in combination with one or more non-fluorocarbon polymers, for dispensing an inhalation drug formulation comprising beclomethasone dipropionate or a physiologically acceptable solvate thereof, and a fluorocarbon propellant, optionally in combination with one or more other pharmacologically active agents or one or more excipients. ically disposed housing with a tapered bottom section, said bottom section further having a generally horizontal inlet constructed and arranged to receive said first treated flue gas stream, said housing having a gas stream directing and distribution assembly positioned within said tapered bottom section and being in general alignment with said baghouse assembly inlet to uniformly distribute said first treated flue gas upward and throughout said housing of said baghouse assembly, said gas distribution assembly being disposed at an angle with respect to said horizontal inlet and further comprising a plurality of spaced parallel and vertically disposed members, said baghouse assembly further having a plurality of filter bags positioned above said gas stream distribution assembly, each said filter bag having a surface for forming a filter cake material on said surface of each said filter bag; and d) a filter cake management system to control the reaction in said reaction vessel, said filter cake management system having means to control and remove said filter cake material from said filter bag surfaces and further having means to activate partial removal of filter cake from said baghouse assembly. 2. The dry scrubber assembly of claim 1, wherein said evaporative cooler vessel inlet includes a gas distribution system comprising a plenum having an orifice disposed approximately 90 degrees with respect to the plenum inlet flow. 3. The dry scrubber assembly of claim 1, wherein said evaporative cooler assembly includes a water and air injector and a reagent injector. 4. The dry scrubber assembly of claim 1, wherein said evaporative cooler vessel wall slopes outwardly from said inlet at a cross-sectional angle of approximately 15 degrees. 5. The dry scrubber assembly of claim 1, wherein said reagent injection venturi assembly includes a reagent pipe having an end positioned generally centrally said flue gas stream at said converging section whereby reagent is injected cocurrent with said flue gas stream. 6. The dry scrubber assembly of claim 1, wherein said gas stream directing and distribution assembly of said baghouse assembly is a ladder vane baffle device. 7. The dry scrubber assembly of claim 1, wherein said filter cake management system includes means to measure pressure differential in said baghouse assembly. 8. The dry scrubber assembly of claim 7, wherein said filter cake management system includes a timer to initiate bag cleaning. 9. A dry scrubber assembly for treating a flue gas stream comprising: a) a flue gas cooling assembly to provide cooled flue gas stream; b) a reagent injection venturi assembly in communication with said flue gas cooling assembly, said reagent injection venturi assembly having converging and diverging sections and wherein a reagent injector is positioned at said converging section, said reagent injector including a reagent pipe having an end positioned generally centrally of said cooled flue gas stream at said converging section whereby reagent is injected generally cocurrent with said cooled flue gas stream and wherein a first treated flue gas stream exits said venturi assembly; c) a reaction vessel bag-house assembly for continuing the reaction between said first treated flue gas stream and said reagent and having an inlet for receiving said first treated flue gas stream and a gas distribution assembly positioned at an angle with respect to said baghouse inlet for evenly distributing said first treated flue gas in said reaction vessel baghouse assembly, said gas distribution assembly being comprised of a plurality of individual members which are serially spaced and vertically disposed, said reaction vessel bag-house assembly comprising a plurality of filter bags, each said filter bag having a surface for the accumulation of filter cake; and d) a filter cake management system including means to measure pressure differential across said filter bags in said reaction vessel bag-house assembly,