Molecular ratio control system for alkylate raw material

Abstract

The invention discloses a molecular ratio control system for an alkylate raw material and relates to the technical field of chemical production systems. The molecular ratio control system comprises a high olefin raw material tank, an isobutene raw material tank, a first pump, a second pump, a first valve bank, a second valve bank, a first flow meter and a second flow meter, wherein the high olefin raw material tank is connected with the second pump through a pipe; the second pump is connected with the second valve bank through a pipe; the second valve bank is connected with the second flow meter through a pipe; the isobutene raw material tank is connected with the first pump through a pipe; the first pump is connected with the first valve bank through a pipe; the first valve bank is connected with a first flow meter through a pipe; and outlets of the first flow meter and the second flow meter are connected with a combined pipe through a pipe and then connected with a raw material feeding device. The ratio of isobutene to butane in the alkylate raw material is strictly controlled, so that smooth alkylation reaction is ensured, fluctuation caused by poor molecular ratio control is avoided, the quality of a product is ensured, long-term, safe and stable operation of the device is ensured and the practicability is higher.

Description

technical field [0001] The invention relates to the technical field of chemical production systems, in particular to a system for controlling the molecular ratio of alkylation raw materials. Background technique [0002] The alkylation unit is an alkylation process for the purpose of producing motor gasoline and aviation gasoline. It uses two types of raw materials. The first type of raw material is isoparaffins. Since the alkylation reaction follows the mechanism of positive carbon ions, the alkanes are required to have tertiary carbon atoms, so it can only be found in alkanes ≥C4; another type of raw material is small molecule olefins, including propylene, butene and pentene. Butene is the best raw material for alkylation, with the best product quality and the lowest acid consumption. The acid consumption of propylene and pentene is almost several times that of butene. In recent years, due to the rapid development of high-octane blending components produced by propylene d...

AI Technical Summary

Problems solved by technology

The molecular ratio of the alkylation raw material is an important control index of the alkylation unit. If the molecular ratio is too high, there will be excess isobutane, which will increase the load of the alkylation unit, affect the production capacity of the unit, and reduce isooctane If the molecular ratio is too low, there will be less isobutane in the system, which will affect the reaction effect, increase the side reaction of alkylation, reduce the quality of isooctane, and cause the alkylation unit to fail to operate normally.

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