Comprehensive utilization system of high-grade acetylene waste gas in process of cracking natural gas into acetylene

Abstract

The invention discloses a comprehensive utilization system of high-grade acetylene waste gas in a process of cracking natural gas into acetylene. The comprehensive utilization system comprises pressurizing equipment, safety equipment, combustion heating equipment, pipeline equipment, temperature monitoring equipment and pressure monitoring equipment, wherein the pressurizing equipment is used forpressurizing high-grade acetylene mixed gas; the security equipment is used for stopping detonation and backfire of the high-grade acetylene mixed gas; the combustion heating equipment is used for performing combustion and heating on the high-grade acetylene mixed gas; the pipeline equipment is sequentially connected with the pressurizing equipment, the safety equipment and the combustion heatingequipment; the temperature monitoring equipment is used for monitoring the temperature of the high-grade acetylene mixed gas to carry out temperature interlocking control on the supply of the high-grade acetylene mixed gas; and the pressure monitoring equipment is used for monitoring the pressure of the high-grade acetylene mixed gas to carry out pressure interlocking control on the flow of the high-grade acetylene mixed gas. According to the comprehensive utilization system of high-grade acetylene waste gas in the process of cracking the natural gas into the acetylene, consumption of naturalgas is reduced, energy conservation and environmental protection are achieved, and a recycling utilization ratio of the high-grade acetylene is high; and moreover, the system is stably and security operated, and is easy to operate.

Description

technical field [0001] The invention relates to the field of natural gas cracking to produce acetylene, in particular to a system for comprehensive utilization of high-grade acetylene waste gas in the process of natural gas cracking to produce acetylene. Background technique [0002] Methane in natural gas undergoes a partial oxidation reaction with oxygen, and undergoes a cracking reaction of methane to generate acetylene, and simultaneously generates hydrogen, carbon monoxide and water, as well as a small amount of carbon dioxide, diacetylene, vinyl acetylene, other hydrocarbons and carbon black. [0003] The main reaction equation is as follows: [0004] Syngas reaction [0005] [0006] Acetylene formation reaction [0007] [0008] Acetylene decomposition reaction [0009] [0010] total reaction formula [0011] 5CH 4 +3O 2 →HC≡CH+6H 2 +3CO+3H 2 o [0012] >1500℃~0.1MPa,1-3ms [0013] Higher alkyne components such as diacetylene and vinyl acetylen...

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Problems solved by technology

[0015] Through the system transformation, instrument setting, interlocking setting, and new equipment of the advanced alkyne waste gas utilization system in the process of natural gas cracking to acetylene, the advanced alkyne is recycled and utilized, which solves the problem of large environmental pollution and low heat energy utilization in the prior art , low production stability and complex system operation technical problems

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