Safe pipeline conveying method for acetylene-rich C4 rich in high-concentration vinyl acetylene

A vinyl acetylene, pipeline transportation technology, applied in pipeline systems, pipeline heating/cooling, pipes/pipe joints/pipe fittings, etc., can solve problems such as potential safety hazards, and achieve the effect of convenient pipeline transportation

CN113236974AActive Publication Date: 2021-08-10新疆天利高新石化股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-08-10

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Abstract

The invention discloses a safe pipeline conveying method for acetylene-rich C4 rich in high-concentration vinyl acetylene. The safe pipeline conveying method comprises the following steps that firstly, high-alkyne tail gas and non-acetylene C4 tail gas are respectively cooled, the high-alkyne tail gas is diluted by using the non-acetylene C4 tail gas, and then mixed gas enters a mixed gas storage tank; then, a plurality of middle conveying buffer units are arranged between the mixed gas storage tank and a conveying terminal; and acetylene-rich C4 is safely conveyed in a segmented conveying mode. Each middle conveying buffer unit comprises a conveying pipeline, a middle buffer tank, a conveying pump and a cooling heat exchanger, an electric heat tracing heat preservation layer is arranged on the outer wall of each conveying pipeline, and a temperature sensor is arranged on each pipeline to monitor the temperature. Through comprehensive and specialized management and control of the vinyl acetylene concentration of acetylene-rich C4, the pipeline conveying pressure and the conveying temperature, safe, long-distance and convenient pipeline conveying can be achieved.
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Description

technical field

[0001] The invention relates to a method for transporting alkyne-rich C4, in particular to a safe pipeline transportation method rich in high-concentration vinylacetylene-rich C4. Background technique

[0002] With the continuous deepening of petrochemical processing, the rational utilization of components in the by-product C4 fractions of liquefied petroleum gas, oilfield associated gas, oil refining units and ethylene cracking units has attracted increasing attention. The C4 fraction is rich in alkynes such as vinyl acetylene and ethyl acetylene. These substances are prone to decomposition and explosion when the concentration exceeds a certain level. Among them, vinyl acetylene is the most dangerous. Studies have shown that when the concentration of vinyl acetylene reaches or exceeds 80 %, decomposition and exothermic reactions begin to occur at 140°C, and will explode when the temperature reaches 165°C. At present, the production enterprises of alkyne-ric...

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Embodiment Construction

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] figure 1 Embodiments of the safe pipeline transportation method of the present invention for enriching high concentrations of vinyl acetylene rich alkyne carbon four are shown.

[0022] like figure 1 Shown, a kind of safe pipeline transportation method that is rich in high concentration vinyl acetylene-rich alkyne carbon four, comprises the steps:

[0023] (1) A cooling heat exchanger is installed at the input end of the high-alkyne tail gas to cool the tail gas. The...