Stone & Webster Engineering Corp.

Other

Herman N Woebcke

Robert J Gartside

Axel R Johnson

Arju H Bhojwani

Swami Narayanan

Joseph J Williams

Paul E Koppel

S Narayanan

Victor Andruszewski

Chi Sheng Kuo

A quench boiler apparatus and process is disclosed wherein the hot effluent gases are indirectly cooled by contact with a central internal cold side, one or more internal bayonets and one or more waterwall tubes.

High capacity rapid quench boiler

An improved hydrocarbon pyrolysis process and apparatus for the production of ethylene comprising a novel furnace comprised of an unfired superheater radiant section and a fired radiant section, adiabatic tube reactor and quench boiler is provided.

Process for pyrolysis of hydrocarbons

Apparatus for pyrolysis of hydrocarbons

The invention is a pyrolysis furnace for cracking heavy oils to olefins. The furnace includes a convection zone and a radiation zone. In parallel streams, the heavy stream and a stream diluent are heated in the convection zone to the point of partial thermal cracking while in the other stream a lighter oil and steam are cracked to produce olefins. The hot, olefinic light stream is then mixed with the heated heavy stream and further cracked in the radiation zone.

Process and apparatus for the production of olefins from both heavy and

An apparatus for delivering fluidization gas to a bed of particulate solids to selectively, locally fluidize the solids above a delivery conduit in communication with a reaction chamber. Also an apparatus is disclosed for intimately mixing hydrocarbon feed with the particulate solids at the end of the delivery conduit in the reaction chamber.

Solids feeding device and system

A process and system for the production of olefins from heavy hydrocarbon feedstocks. A heavy hydrocarbon feed is first pretreated at high pressure and moderate temperatures to preferentially remove coke precursors in a liquid product. The pretreated hydrocarbon is then separated into lighter and heavier fractions; the lighter fraction being further thermally cracked to produce olefins.

Integrated heavy oil pyrolysis process

An apparatus and method embodied in a TRC system for rapidly separating particulate solids from a mixed phase solids-gas stream which may be at velocities up to 150 ft./sec. and at high temperature. Specifically, the device is designed for incorporation at the discharge of solid-gas reacting TRC systems having low residence time requirements and carried out in tubular type reactors. Separation is effected by projecting solids by centrifugal force against a bed of solids as the gas phase makes a 180.degree. directional change, said solids changing direction only 90.degree. relative to the incoming stream.

Low residence time solid-gas separation device and system

The invention is a method for cracking heavy oils to olefins. In parallel streams, the heavy stream and a steam diluent are heated to the point of partial thermal cracking while in the other stream a lighter oil and steam are cracked to produce olefins. The hot, olefinic light stream is then mixed with the heated heavy stream and further cracked. The hot, olefinic stream acts as both a diluent and a heat source for cracking the heavy oil to an olefin containing product.

Duocracking process for the production of olefins from both heavy and

A process for quenching and cooling reactor effluent is provided. The apparatus utilized to practice the process includes a section for introducing relatively cool particulate solids into a hot effluent stream to effect initial quenching and a section to further cool the composite quenched effluent and solids. The process employs relatively cool particulate solids to quench hot effluent and indirect heat exchange between water and the quenched effluent-solids mix to generate high pressure steam and further cool the mix.

Solids quench boiler and process

This invention relates to an apparatus and method embodied in a TRC system for rapidly separating particulate solids from a mixed phase solids-gas stream which may be at velocities up to 150 ft./sec. and at high temperature. Specifically, the device is designed for incorporation at the discharge of solid-gas reacting TRC systems having low residence time requirements and carried out in tubular type reactors. Separation is effected by projecting solids by centrifugal force against a bed of solids as the gas phase makes a 180.degree. directional change, said solids changing direction only 90.degree. relative to the incoming stream.

Low residence time solid-gas separation process

An improved process and apparatus for generating fuel gas and decoking particulate solids used as the source of heat to effect chemical reactions in a TRC system.

Fuel gas generation for solids heating

A process for quenching and cooling the reactor effluent in a thermal regenerative cracking (TRC) system is disclosed. The process for quenching the reactor effluent includes the steps of introducing particulate solids into the reactor effluent stream, passing the composite stream of reactor effluent and particulate solids in indirect heat exchange relationship with a coolant, separating the solids and quenched effluent and returning the separated solids to quench effluent.

This invention relates to an apparatus and method for rapidly separating particulate solids from a mixed phase solids-gas stream which may be at velocities up to 150 ft./sec. and at high temperature. Specifically, the device is designed for incorporation at the discharge of solid-gas reacting systems having low residence time requirements and carried out in tubular type reactors. Separation is effected by projecting solids by centrifugal force against a bed of solids as the gas phase makes a 180.degree. directional change, said solids changing direction only 90.degree. relative to the incoming stream.

An improved process for producing ethane from aromatic hydrocarbons is described. Hydrogen and the hydrocarbons are introduced into a catalytically inert reactor zone and are reacted under closely controlled conditions which provide an enhanced yield of ethane.

Growing community of inventors

Stamford, CT, United States of America

Herman N Woebcke