Bethlehem Steel Corporation

Other

Daniel Kwasnoski

Charles J Sterner

Kenneth R Burcaw, Jr

Joseph A Laslo

Mehmet O Tarhan

Russel J Horst

Eugene M Rudzki

Charles W Sheldrake

Vernon B Mancke

Carl R Symons

The fouling of ammonia stills which results from the clogging, particularly of the lower plates of the stills, with sludge and precipitates is eliminated by use of combined apparatus in which a calcium compound precipitation step followed by a clarification step prior to initiation of actual distillation can be effected.

Apparatus for the distillation of weak ammonia liquor

The thermal efficiency of an ammonia still is significantly increased by the use, in conjunction with the usual countercurrent steam stripping medium, of an auxiliary inert gas stripping medium initially heated and humidified by passage through a heat exchanger together with hot still bottoms derived from the still.

Apparatus for distillation

A process for controlling emissions resulting from hot coke being discharged from an oven of a battery of coke ovens from the beginning of discharge until the time when the coke arrives at a quenching station. The coke from the oven passes through a coke guide and a fume hood into an open-top, one-spot quenching car. The hood covers the car during discharge and is connected to an exhaust system, including a gas cleaning device, which draws air into the hood in an amount sufficient to control emissions and for combustion of the volatile matter and other combustibles emitted from the coke during the time coke is discharged into the quenching car and for a short period of time thereafter. During the movement of the open-top, one-spot quenching car from under the hood to the quenching station, the visible emissions given off by the hot coke are less than 40% opacity. The process can also be practiced with one-spot quenching cars of a different design, including a covered one-spot car that receives coke through an opening in the car. Associated with the car is a gas exhaust-cleaning system which, as hot coke is discharged from an oven into the car, operates at a predetermined rate to draw air into the car in an amount sufficient to control emissions and for combustion of volatile matter and other combustibles emitted from the coke.

Coke pushing emission control system

A method and apparatus for selectively removing H.sub.2 S from an H.sub.2 S and CO.sub.2 containing gas stream which has a variable flow rate. The absorption apparatus is divided into two connected individual absorption volumes in which the gas and absorbent solution can countercurrently contact each other and has means to control the passage of the fluid streams through the individual absorption volumes.

Selective removal of H.sub.2 S from an H.sub.2 S and CO.sub.2 containing

A method and apparatus for selectively removing a desired gaseous component from a gas stream containing at least two gaseous components and having a variable flow rate. The absorber is divided into at least two individual absorption volumes connected in series in which the gas and absorbent solution can countercurrently contact each other and includes means to control the passage of the fluid streams through the individual absorption volumes.

Selective removal of a gaseous component from a multi-component gas

The thermal efficiency of an ammonia still is significantly increased by the use, in conjunction with the usual countercurrent steam stripping medium, of an auxiliary inert gas stripping medium initially heated and humidified by heat exchange with hot still bottoms derived from the still.

Method and apparatus for distillation

Hydrogen sulfide is substantially completely removed from a sulfur bearing industrial gas stream by absorbing the H.sub.2 S into a liquid absorbent, stripping the absorbent of absorbed H.sub.2 S and reacting it with SO.sub.2 in a ratio of H.sub.2 S/SO.sub.2 greater than the stoichiometric ratio of 2.0:1.0 to produce elemental sulfur and water, leaving a tail gas containing an excess of hydrogen sulfide but no sulfur dioxide. At least the last stage of the reaction is carried out in a liquid reaction medium at a temperature not greater than 160.degree. C. The excess H.sub.2 S assures complete reduction at these temperatures of all SO.sub.2 to elemental sulfur. The remaining excess H.sub.2 S is then recycled in the tail gas back into the original industrial gas stream prior to the point of contact of the industrial gas stream with the liquid absorbing solution.

Method for substantially complete removal of hydrogen sulfide from

Fouling of an ammonia still, used for removal of ammonia from weak ammonia liquor derived from a coal coking operation, is alleviated by pre-precipitating insoluble calcium salts from the ammonia liquor by treatment of the liquor with lime prior to introduction into a single-leg still.

Method for improved distillation of ammonia from weak ammonia liquor

The fouling of ammonia stills which results from the clogging, particularly of the lower plates of the stills, with sludge and precipitates is eliminated by use of a calcium compound precipitation step followed by a clarification step prior to initiation of actual distillation.

Process for the distillation of weak ammonia liquor

The efficiency of a multi-stage rinsing operation is improved by routing a substantial portion or all of the overflow rinse liquor from the collecting tank of one stage directly to the spray rinse of the next succeeding stage along with rinse liquor from said succeeding stage. Improved cleanliness of the rinse liquor at each rinse stage is thereby attained while maintaining a self-regulating rinse system.

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Hellertown, PA, United States of America

Daniel Kwasnoski