Horizontal alkylation reactor with recycle acid feeding distribution tube

Abstract

The invention relates to a horizontal alkylation reactor with a recycle acid feeding distribution tube. The horizontal alkylation reactor comprises a body, a guiding tray, a mechanical sealing system and an electromotor, wherein the body is respectively provided with a coolant inlet, a cooling outlet, a reaction product and acid outlet, a raw material inlet, a recycle acid inlet, a waste acid outlet, a mixture outlet and a safety valve opening; an inner circulating sleeve is arranged in the body, and the guiding tray at the rear end of the body is connected with the electromotor by virtue of the mechanical sealing system; a U-shaped tube heat exchanging tube bundle is arranged in the inner circulating sleeve, a propeller is arranged between the tail end of the inner circulating sleeve and the guiding tray, and a main shaft of the propeller is arranged at the mechanical sealing system and connected with the electromotor by virtue of a coupler; the recycle acid inlet is connected with the recycle acid feeding distribution tube, the tail end of the recycle acid feeding distribution tube is of a choke plug, and a hole is formed in the choke plug; and the raw material inlet is connected with a raw material distribution tube. By adopting the horizontal alkylation reactor, the recycle acid is mixed with the raw material in an injection manner by virtue of the hole and directly reaches the front part of the propeller, so that the acid is adequately mixed with the material and uniformly dispersed, and the alkylation reaction is facilitated.

Description

technical field [0001] The invention belongs to the field of refining and chemical equipment, and relates to a horizontal alkylation reactor, in particular to a horizontal alkylation reactor provided with circulating acid feed distribution pipes. Background technique [0002] The horizontal alkylation reactor is a horizontal eccentric double fulcrum built-in U-shaped tube heat exchanger type stirred reactor, which belongs to the type II pressure vessel and is the key equipment in the catalyst (H2SO4) method alkylation reaction (the catalyst is 90%~ 98% concentrated sulfuric acid). The reaction raw material (C4 fraction of liquefied petroleum gas, mainly composed of isobutane and butene) undergoes alkyl addition reaction under the action of concentrated sulfuric acid to produce a mixture of alkanes with various branched chains, collectively referred to as alkylate oil. The reaction is a liquid-phase exothermic reaction, and a lower reaction temperature is conducive to the po...

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Problems solved by technology

However, the circulating acid inlet of the alkylation reactor is not ideal for the distribution of circulating acid, and the efficiency has not yet reached expectations. It is necessary to continue to improve the uniformity of acid and raw material mixing

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