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A catalytic oxidizer having an interactive dilution control system for continuous treatment of air hydrocarbon vapor mixture having a shell vessel for enclosing a central volume of generally circular cross-section, a combined catalyst chamber and spiral heat exchanger integrally connected and coaxia

A catalytic oxidizer having an interactive dilution control system for continuous treatment of air hydrocarbon vapor mixture having a shell vessel for enclosing a central volume of generally circular cross-section, a combined catalyst chamber and spiral heat exchanger integrally connected and coaxially positioned within the shell vessel, also of cylindrical configuration, for providing a continuous transverse flow path from an inlet header to the exhaust header including a spiral heat exchanger for providing counter-flow heating of vapor, a catalyst chamber centrally positioned in said shell vessel an inlet plenum, a central core for containing a catalyst means, and an exhaust plenum; and interactive dilution control apparatus for automatically maintaining a concentration of inlet vapor at a selected optimum operating level including a microprocessor control sub-system for sensing the temperature in each zone of the catalyst chamber connected to the dilution control means; by-pass apparatus connecting the exhaust plenum with an exhaust stack means for controlling the heat recovery in said spiral heat exchanger; and dilution control apparatus connected to inlet means for providing variable inlet flow; wherein said dilution control sub-system in combination with said microprocessor control sub-system and said by-pass control sub-system automatically adjusts inlet dilution of air hydrocarbon vapor mixtures for optimum operational efficiency and automatic adjustment of heat recovery of the spiral heat exchanger with controlled by-pass of exhaust air hydrocarbon vapor, including automatic shutoff.

대표청구항 ▼

A catalytic oxidizer having an interactive dilution control system for continuous treatment of air hydrocarbon vapor mixture comprising: a) shell means for enclosing a central volume of generally circular cross-section having a longitudinal axis and a wall of generally cylindrical configuration, inc

A catalytic oxidizer having an interactive dilution control system for continuous treatment of air hydrocarbon vapor mixture comprising: a) shell means for enclosing a central volume of generally circular cross-section having a longitudinal axis and a wall of generally cylindrical configuration, including an inlet header and an exhaust header; b) a combined catalyst chamber and spiral heat exchanger integrally connected and coaxially positioned within the shell means, also of cylindrical configuration, for providing a continuous transverse flow path from the inlet header to the exhaust header having a longitudinal and transverse dimension for two dimensional flow of vapor comprising: i) a spiral heat exchanger for providing counter-flow heating of vapor comprising a pair of spaced spiral plates forming there between a first spiral flow passage having an external end and an internal end defining a transverse inlet spiral flow path and a second spiral flow passage having an internal end and an external end defining a transverse exhaust spiral flow path; and ii) a catalyst chamber centrally positioned along the longitudinal axis of the shell means having permeable partition means for dividing the catalyst chamber into three zones comprising an inlet zone comprising an inlet plenum having an inlet aperture, a central core zone for containing a catalyst means, and an exhaust zone comprising an exhaust plenum having an exhaust aperture; wherein the inlet spiral flow of the heat exchanger is connected to the inlet plenum defining a first heat exchange region, and the transverse exhaust spiral flow path is connected to the exhaust plenum and is positioned adjacent to the inlet spiral flow path defining a second heat exchange region and said inlet aperture and exhaust aperture are positioned on opposite sides of the catalyst chamber for providing transverse two dimensional flow of vapor previously heated in the spiral heat exchanger with flameless combustion of the vapor introduced therein; and c) vapor inlet supply line connected to the inlet header for introducing a hydrocarbon vapor stream to said inlet header; d) dilution supply line including a dilution valve, said dilution supply line connected to the vapor inlet supply line for introducing dilution air to the vapor stream; e) means for heating said stream of air hydrocarbon mixture to operating temperature comprising a heater positioned at the inlet aperture of the inlet plenum; f) interactive dilution control means for automatically maintaining a concentration of inlet vapor at a selected optimum operating level comprising: i) microprocessor control means comprising a microprocessor control sub-system including three programmable T1, T2, T3 controllers connected to sensing means disposed in each zone for sensing the temperature in each zone of the catalyst chamber, each zone operationally connected to dilution control means; ii) by-pass control means connecting the exhaust plenum with an exhaust stack for controlling the heat recovery in said spiral heat exchanger; and iii) dilution control means connected to the vapor inlet supply line and dilution supply line for adjusting the proportion of dilution air admitted to vapor stream; wherein said dilution control means in combination with said microprocessor control sub-system and said by-pass control means automatically adjusts inlet dilution of air hydrocarbon vapor mixtures for optimum operational efficiency with manual adjustment of heat recovery of the spiral heat exchanger and controlled by-pass of exhaust air hydrocarbon vapor, including automatic shutoff.