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US 2019/0282991 A1Published application
Off-gas incinerator control
AssigneeIneos Europe AG
InventorsManoj Shrikant Shouche, Timothy Robert McDonel, Jay Robert Couch
Life of this patent
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Abstract
A process provides for minimizing an amount of fuel gas utilized in an absorber off-gas incinerator and better control of emissions. The process provides for less temperature deviations in the absorber off-gas incinerator firebox and for less deviation in an amount of oxygen in the absorber off-gas incinerator stack gas.
Claims27
A process for operating an off-gas incinerator, the process comprising:
- introducing a flow of a reactant stream into an ammoxidation reactor;
- determining an amount of hydrocarbon in the reactant stream and determining a feed rate of the reactant stream;
- conveying a reactor effluent from the ammoxidation reactor to an absorber;
- supplying an absorber off-gas from the absorber to an absorber off-gas incinerator;
- and
- supplying fuel gas and air to the absorber off-gas incinerator;
- wherein the absorber off-gas, fuel gas, and air are supplied to the absorber off-gas incinerator in amounts to maintain about 6 kg or less NOx in an absorber off-gas incinerator stack gas per ton acrylonitrile produced and about 3.5 kg or less non-methane hydrocarbon in absorber off-gas incinerator stack gas per ton acrylonitrile produced.
4 more elements
A process for operating an off-gas incinerator, the process comprising:
- introducing a flow of a reactant stream into an ammoxidation reactor;
- determining an amount of hydrocarbon in the reactant stream and determining a feed rate of the reactant stream;
- conveying a reactor effluent from the ammoxidation reactor to an absorber;
- supplying an absorber off-gas from the absorber to an absorber off-gas incinerator;
- and
- supplying fuel gas and air to the absorber off-gas incinerator;
- wherein the absorber off-gas, fuel gas, and air are supplied to the absorber off-gas incinerator in amounts to maintain a temperature in the off-gas incinerator within about 10° F. of a temperature set point of the off-gas incinerator.
4 more elements
A process for operating an off-gas incinerator, the process comprising:
- introducing a flow of a reactant stream into an ammoxidation reactor;
- determining an amount of hydrocarbon in the reactant stream and determining a feed rate of the reactant stream;
- conveying a reactor effluent from the ammoxidation reactor to an absorber;
- supplying an absorber off-gas from the absorber to an absorber off-gas incinerator;
- and
- supplying fuel gas and air to the absorber off-gas incinerator;
- wherein a set of manipulated variables includes fuel gas flow to the absorber off-gas incinerator and the air flow to the absorber off-gas incinerator, and a set of controlled variables includes an amount of oxygen in the absorber off-gas incinerator stack gas and a temperature in the absorber off-gas incinerator,
- wherein controlling at least one set of controlled variable includes adjusting manipulated variables,
- wherein feedforward variables are used to change the manipulated variables.
6 more elements
Dependencies are inferred from the claim text.