Pulverized coal flow control system
Patent 4932594 Issued on June 12, 1990. Estimated Expiration Date: 
May 24, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 24, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2251029 2428422 Control apparatus for a pneumatically-operated hopper feeder Apparatus and method for feeding pulverized hydrocarbonaceous solids into a high pressure reactor Reaction mass flowmeter Patent #: 4569232 InventorApplicationNo. 197926 filed on 05/24/1988US Classes:241/19, To classify or separate material110/106, Pulverizer110/265, Having secondary air mixing means241/34, Of feed of material241/48, With recirculation of gas to comminuting zone241/80, Oversize return to comminuting zone241/119, With material moving or discharge means406/19, Responsive to presence or absence or quantity of load406/197PROCESSESExaminersPrimary: Rosenbaum, MarkAttorney, Agent or FirmForeign Patent References
International ClassB02C 023/34AbstractAn apparatus for supplying a controlled flow of pneumatically transported solid particles, in particular, pulverized coal, comprises a pulverizer or vessel for containing pneumatically suspended solid particles. A supply pipe is connected to the pulverizer or vessel for removing a mixture of pneumatic gas and solid particles from the vessel. A bend is provided in the supply pipe and an aspirator is connected to the supply pipe at a distance of from one to two pipe diameters from the bend. The aspirator is provided on the outer wall of the bend and is supplied with aspirating gas to draw off an amount of mixture from the supply pipe. This controls the amount of remaining flow of mixture through the pipe. The supply of the aspirator is connected to a bypass line which is connected to the mixture inlet of an injector which is supplied with injecting gas. The supply of the injector which carries the mixture is connected back into the vessel. The flow of aspirating and injecting gas is controlled on the basis of flow measurements taken on the supply pipe from the vessel. The aspirator and injector can accurately control the flow of pneumatically suspended solid particles.Field of SearchWith material moving or discharge meansApplied subsequently to comminuting With recirculation of material to comminuting zone Local application within comminuting zone Applied prior to comminuting Gas or vapor To classify or separate material Of feed of material With automatic control Oversize return to comminuting zone With recirculation of material to comminuting zone With recirculation of gas to comminuting zone Suction induced by pressure stream Responsive to presence or absence or quantity of load Responsive to presence, absence, or quantity of load Having fluid nozzle Conveying fluid velocity altered at load input Having connection for external suction or pressure source HAVING MEANS TO INTRODUCE BOOSTER FLUID INTO CONVEYOR Combined intake and discharge With wear protection means PROCESSES Blower Feed control Having secondary air mixing means Burning pulverized fuel Pulverizer | |
