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US 4,381,218 AGranted
Apparatus for testing combustibility of wood pulp blow gases
AssigneeWestvaco Corporation
InventorNicholas T. Kern
Life of this patent
Estimating the term…
Abstract
The flammability of non-condensible blow gases from a wood pulping digester is continuously monitored by venting a low volume sample flow stream of such gases through a small combustion chamber where the stream is subjected to an intermittent ignition source. Unusually high pressures in the combustion chamber resulting from ignition of a flammable mixture are detected by pressure measuring means providing the operative result of automatically venting a dangerous flow increment of the gas.
Claims2
The combination of:
- A. A wood pulping digester blow tank having means to substantially isolate vaporous constituents from the liquid and solid constituents of a blow charge of cooked wood pulp;
- B. Means to substantially isolate non-condensible gases from said vaporous constituents within a primary flow stream carrier duct;
- C. Means to combine said non-condensible gases with firebox draft for a heating appliance;
- D. First conduit means connecting combustion chamber means with said carrier duct to continuously draw a sample flow of said gas from said primary flow stream into said combustion chamber;
- E. Second conduit means for continuously venting said combustion chamber;
- F. Intermittent Ignition means within said combustion chamber to ignite combustible portions of said gas;
- G. Pressure responsive means connected to said combustion chamber for emitting control signals when pressures within said combustion chamber exceed a first predetermined magnitude;
- and,
- H. Means to divert said primary flow stream away from said firebox draft in response to said control signals.
6 more elements
Dependencies are inferred from the claim text.