Alkylation reaction device and technique

Abstract

The invention discloses an alkylation reaction device and technique. According to the alkylation reaction device, an alkylation reaction area inside an alkylation reactor is composed of a vertically filled filler pipe bundle and an atomized coolant microbubble dispersing pipe bundle, wherein the filler pipe bundle is composed of an external barrel and internal fillers, the internal fillers are orderly woven fillers woven from fiber bundles, and the fiber bundles are at least composed of lipophilic and hydrophobic or hydrophilic and lipophobic fiber bundles; the atomized coolant microbubble dispersing pipe bundle is arranged around the filler pipe bundle and disperses gas-liquid coolant mixtures, which are uniformly atomized by a coolant circulating sucker, into microbubbles. The alkylationreaction device and technique can promote uniform mixing of reaction materials, maintain microscale temperature uniformity during reaction and improve selectivity and reaction yield of alkylation reaction, thereby having the advantages of high reaction efficiency, less side reaction and the like.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and specifically relates to an alkylation reaction device and a process method, in particular to a reactor and an alkylation reaction method using sulfuric acid as a catalyst for the alkylation reaction of isoparaffins and olefins. Background technique [0002] The alkylation process is an important clean gasoline processing technology in the refining process. The product alkylate oil is an ideal gasoline blending component, with no aromatics, no olefins, low sulfur, low vapor pressure, high octane number ( RON 94~96, MON 92~94) and other advantages. The current mainstream technology is liquid acid alkylation technology, mainly including sulfuric acid alkylation and hydrofluoric acid alkylation. Due to the strong volatility and toxicity of hydrofluoric acid, all the currently operating and under construction in my country Alkylation method for sulfuric acid. In order to reduce side reaction...

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Problems solved by technology

[0004] CN203295447U has proposed a kind of tube-and-tube alkylation reactor, the tube side is the reaction area, the shell side is the heat exchange area, and the two ends of the tube body are respectively the pre-distribution area and the reactant outflow area, and the reactor is suitable for isoparaffin The reaction of high-octane alkylate with light olefins under the action of liquid acid catalyst, because this method is a conventional tube reactor, there are many problems such as complex equipment structure, low production efficiency, serious side reactions of materials in the tube, etc.

[0006] Judging from the current status of alkylation technology at home and abroad, the following problems still exist in the alkylation reaction process: (1) Since the alkylation reaction is an exothermic reaction, the material distribution is uneven (including radial material distribution and axial material distribution) ) will intensify the occurrence of side reactions of olefin polymerization and affect the product quality of alkylated oil; The mass and reaction rate are low, so it is necessary to provide the surface area for the acid hydrocarbon reaction, and it is also very important to provide the mass transfer driving force of the reaction material; (3) The heat of reaction (including radial reaction heat and axial reaction heat) in the reaction process needs to be timely Remove it, otherwise local hot spots will appear, side reactions will occur and the reaction efficiency will be reduced. The ideal way is that the reactor always maintains the constant temperature reaction process of the initial state, but in fact it can only be infinitely close and cannot be achieved.

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