Safe discharging tank and application thereof

Abstract

The invention relates to the field of chemical engineering accident emergency disposal, and discloses a safe discharging tank and application thereof. The safe discharging tank comprises a tank body (14), wherein a primary separation baffle plate (6) and a secondary separation baffle plate (7) are arranged at the lower part in the tank body (14), so that the internal space of the tank body (14) issequentially divided into a first phase region (11), a mixed phase region (12) and a second phase region (13) of which the upper parts are communicated with one another; the primary separation baffle(6) is higher than the secondary separation baffle (7), so that the liquid in the first phase region (11) can overflow to the mixed phase region (12), and the liquid in the mixed phase region (12) can overflow to the second phase region (13); and a material returning inlet (1) is formed in the upper part of the first phase region (11). The safe discharging tank is particularly suitable for separation of an acid phase and an organic phase in a sulfuric acid alkylation process, two phases can be rapidly separated, and two-phase reaction is reduced.

Description

technical field [0001] The invention relates to the field of emergency treatment of chemical accidents, in particular to a safety discharge tank and its application, in particular to a safety discharge tank suitable for the separation of an acid phase and an organic phase in a sulfuric acid alkylation process and its application. Background technique [0002] The sulfuric acid alkylation process is an ideal process for producing high-octane gasoline. It uses concentrated sulfuric acid as a catalyst to react butene with isobutane to produce high-octane gasoline with trimethylpentane as the main component. The volume ratio of the acid to hydrocarbon is about 1:1.5. Due to the poor compatibility between the acid phase and the hydrocarbon phase, it is necessary to mix the two phases by stirring or static mixer to cause interfacial reaction. [0003] In this process, there are two main safety risks. First, due to the strong oxidizing properties of concentrated sulfuric acid, the ...

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Problems solved by technology

[0004] The key equipment of the sulfuric acid alkylation process is the reactor. When the corrosion leakage of the reactor is uncontrollable, the reaction system needs to be quickly removed and stored in the storage tank, and the mixing effect of the acid hydrocarbon phase is reduced during the transfer storage process. , so that the heat transfer effect is reduced and the concentration of certain substances at the two-phase interface is aggravated, which causes problems such as intensified side reactions and local overheating, and further causes the reaction of the entire system to be out of control

There is no separation device and method for better two-phase mixed reaction liquid material in the prior art

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