Radial fixed-bed dehydration reactor

Abstract

The invention relates to a radial fixed-bed dehydration reactor. The radial fixed-bed dehydration reactor comprises an inlet gas heating-up section and a radial reacting section, wherein the inlet gasheating-up section is provided with an upper closure head and a lower closure head; the radial reacting section comprises a shell body, a central gas distributing pipe and a radial reaction basket with a plurality of vent holes, a plurality of gas distributing holes are formed in the side wall of the central gas distributing pipe, an annular space between the central gas distributing pipe and theshell body is divided into a radial reaction chamber and a gas collection chamber through the radial reaction basket, and a catalyst bed layer is formed in the radial reaction chamber; a central flowdeflection cone is arranged in the central gas distributing pipe, and a tip of the central flow deflection cone corresponds to an inlet of the central gas distributing pipe; and the shell body at aninlet end of the radial reacting section is welded to the lower closure head of the inlet gas heating-up section, and a gas inlet of the radial reacting section is connected with a pipe side gas outlet of the inlet gas heating-up section. The radial fixed-bed dehydration reactor can more efficiently adapt to a dehydration reaction of organic alcohols, and thus, alkene products have higher selectivity.

Description

technical field [0001] The invention belongs to the field of chemical equipment, and in particular relates to a radial fixed-bed reactor, which is especially suitable for co-products in co-oxidation propylene oxide devices: for example, 1-phenylethyl alcohol, dimethyl benzyl alcohol, tert-butanol, etc. dehydration reaction. Background technique [0002] Using organic hydrogen peroxide as an oxygen carrier (such as ethylbenzene hydroperoxide, tert-butyl hydroperoxide, and cumene hydroperoxide) to oxidize propylene to obtain propylene oxide and styrene, that is, the Haakon method is As everyone knows, there are industrialized devices at present. [0003] A typical co-oxidation propylene oxide co-production process includes the following steps: [0004] (a) the organic matter reacts with the oxygen in the oxygen-containing gas to generate organic matter hydrogen peroxide; [0005] (b) organic matter hydrogen peroxide reacts with propylene to generate propylene oxide and orga...

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Problems solved by technology

[0011] 2. The dehydration of organic alcohols to olefins is a molecular reaction, and the lower reaction pressure is more conducive to the dehydration reaction. Therefore, negative pressure operations are generally used in the process to maximize the conversion rate of organic alcohols, but negative pressure operations are used It also puts forward higher requirements on the resistance drop of the dehydration catalytic bed

[0013] 4. In the co-oxidation propylene oxide plant, due to the long process and many reactions, the organic alcohol raw material before entering the dehydration reactor has many impurities, including oxygen-containing alcohols, aldehydes, esters, phenols, ethers, and non-alcoholic alcohols. Oxygen-containing olefins, alkanes, etc. Many of these impurities are more active than organic alcohol co-products. When the materials are heated and enter the catalyst bed, they will be dehydrated preferentially, and the generated olefins are more likely to polymerize and coke, which will cause radial reactors. The distribution hole of the inlet distribution pipe is partially or even massively blocked, which affects the uniformity of the reactor and generates a large number of by-products

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