A propylene gas catalytic deoxygenation reaction device and safety control method

Abstract

The invention discloses a propylene gas catalytic deoxygenation reaction device and a safety control method, and relates to the technical field of chemical tail gas treatment. After the raw material propylene tail gas is heat-exchanged by the heat exchanger, it is further heated by the electric heater to the reaction operating temperature, and then enters the deoxidation reactor. The deoxidation reactor is equipped with a catalyst bed. The air condenser cools down and enters the gas-liquid separation tank to separate the liquid phase generated during the reaction. The gas phase enters the non-condensable gas separation tower after being boosted by the compressor, and the non-condensable gas is separated from the gas phase, and pure propylene is obtained from the liquid phase; in the fourth The outlet pipeline is equipped with a tail oxygen analyzer, which can detect the tail oxygen content. If it is higher than the normal value, the backflow treatment will be carried out through the fourth outlet branch pipeline, and an alarm value will be set. The invention is especially suitable for accident scenarios such as super-high concentration of tail oxygen and over-temperature of a reactor that may occur during operation.

Description

technical field [0001] The invention relates to the technical field of chemical tail gas treatment, in particular to a propylene gas catalytic deoxidation reaction device and a safety control method. Background technique [0002] Oxygen-containing organic hydrocarbon gas or tail gas is a common gas in the current chemical production, storage and transportation process, such as organic tail gas in the oxidation and peroxidation process, tail gas from the tank farm communication system, landfill gas, etc., often due to high oxygen content And it brings the risk of explosion; and SH 3009-2013 "Petrochemical Combustible Gas Emission System Design Code" 5.3.1 stipulates that "combustible gases with oxygen content greater than 2% (v%)" should not be discharged into the whole plant Combustible gas discharge systems, such as flares, incinerators, etc. Therefore, in order to reduce the risk of explosion, recycle organic gas or ensure that the oxygen-containing organic tail gas meets...

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Problems solved by technology

[0003] The gas deoxygenation technologies in the prior art mainly include pressure swing adsorption deoxygenation, chemical adsorption deoxygenation, activated carbon combustion deoxygenation, and catalytic combustion deoxygenation. Among them, physical and chemical adsorption deoxygenation has a small load and is suitable for the removal of trace oxygen. The activated carbon deoxygenation temperature is high. high energy consumption

The current catalytic deoxygenation technology basically requires the addition of H 2 and other reducing gases, and the separation of reducing gases has become a more difficult problem to solve

The organic gas catalytic oxidation deoxygenation technology in the current prior art is mainly aimed at methane-containing gases such as coalbed methane and landfill gas, and the deoxygenation technology for olefins such as ethylene and propylene is only suitable for the removal of trace oxygen at the ppm level, and no one for ethylene , propylene and other olefins catalytic deoxygenation technology

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