KR890700045A - Fluidized bed - Google Patents

Abstract

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Description

Fluidized bed

Since this is an open matter, no full text was included.

The figure is a simplified schematic diagram of a fluidized bed vessel according to the present invention.

Claims (19)

An apparatus for producing maleic anhydride, the apparatus comprising: a fluidized bed vessel, an inlet means for introducing gas into the bottom of the vessel, an outlet means for recovering gas from the top of the vessel, and at least one horizontal arrangement in the vessel. A heat exchange tube bank, the heat exchange tube bank containing at least a series of horizontally arranged plurality of tubes, wherein the horizontal tubes have a space between them so as to allow fluid flow between the upper and lower vessels inside the tube bank. When projected onto a plan view of at least one tube bank, which provides a free-flow zone, the percentage of cross-sectional area formed by the space between the tubes is a plug flow of gas through the reaction vessel, compared to the free cross-sectional area of the vessel without the tube bank. Characterized in that less than 60% for the removal of air bubbles . 2. The container of claim 1, wherein the vessel has at least two vertically spaced tubebanks, each of the tube banks including at least two rows of horizontal tubes having space for providing a free flow zone between the tubes. Device characterized in that. The device according to claim 2, wherein the open cross sectional area between the tubes of each horizontal column is at least 10% of the cross sectional area of the tubeless vessel. 4. The container of claim 3, wherein the vessel comprises a solid particle fluidized bed, wherein at least two tube banks are disposed in the solid. Device in a particle fluidized bed. The method of claim 4, wherein the continuous tube banks are vertically spaced apart from each other at a distance of 0.2 to 4.0 meters. Device 6. The apparatus of claim 5, wherein the percentage is 50% or less. 7. The apparatus of claim 6, wherein the continuous tube banks are spaced apart from each other at a distance of 0.2 to 2.0 meters. A method of calculating maleic anhydride, wherein the gas is reacted with a fluidized bed in a plug flow while removing rising bubbles, and reacting a gas containing hydrocarbons and oxygen in an oxidation catalytic fluidized bed of the apparatus of claim 1, and an effluent comprising maleic anhydride. Recovering water from the outlet means. 9. The method of claim 8, wherein the oxidation catalyst has a particle size of 20 to 500 microns. 10. The process of claim 9, wherein the reaction is carried out at a temperature of 330-498 ° C. The method of claim 10, wherein the hydrocarbon is n-butane. 10. The method of claim 9, wherein the particle size is 20 to 150 microns. The method of claim 12, wherein the temperature is 370 to 450 ℃. A method for producing maleic anhydride, wherein the gas flows through a fluidized bed in a plug flow while removing rising bubbles, and reacting a gas containing hydrocarbons and oxygen in an oxidation catalytic fluidized bed of the apparatus of claim 7 and comprising maleic anhydride. Recovering the effluent from the outlet means. 15. The method of claim 14, wherein the oxidation catalyst has a particle size of 20 to 500 microns. The method of claim 15 wherein the reaction is carried out at a temperature of 330 to 490 ° C. The method of claim 16, wherein the hydrocarbon is n-butane. The method of claim 15, wherein the particle size is 20 to 150 microns. 19. The method of claim 18, wherein the temperature is between 370 and 450 ° C. ※ Note: The disclosure is based on the initial application.