A continuous decoking method for a thermal plasma reactor

Abstract

The invention discloses a continuous decoking method for a thermal plasma reactor. The continuous decoking method is characterized in that in the cleavage reaction process, decoking gas is continuously introduced to react with a coking material so as to finish coke cleaning; the decoking gas is carbon dioxide or a gas mixture of carbon dioxide and hydrogen. According to the invention, the pyrolysis gas flow and composition can't be influenced, the decoking can be conducted continuously, the continuous decoking method has the characteristics of short decoking time and high decoking efficiency, more safety and lower energy consumption; the continuous decoking method is suitable for different thermal plasma reactors and has an obvious cleaning effect for coking materials with different properties and content.

Description

technical field [0001] This paper relates to the field of thermal plasma reaction engineering at high temperature, in particular to a continuous decoking method for thermal plasma reactors. Background technique [0002] With the gradual depletion of oil resources and rising oil prices, people have turned their attention to coal, which is more abundant in resources. As a basic chemical raw material that can be obtained in large quantities from coal, acetylene is a good substitute for downstream products of petroleum and ethylene. There are two ways to produce acetylene in my country: calcium carbide hydrolysis and methane partial oxidation. The former has a long production process and CO 2 Large emissions and serious pollution, the latter is limited by the limited domestic natural gas resources. [0003] Thermal plasma pyrolysis coal acetylene technology utilizes the characteristics of thermal plasma high temperature (>3000K), high enthalpy, and rich in active particles....

AI Technical Summary

Problems solved by technology

Among them, the reactor structure of the oxygen decoking method is simple and easy to implement, but if the mixed oxygen and hydrogen are not properly operated, there is a risk of explosion; although the water (steam) decoking method has a good effect, the energy consumption is relatively high , water vapor condensation can easily cause short circuit of the equipment, posing safety hazards

[0008] In addition, since the cracking reaction raw materials containing hydrocarbons such as coal and hydrocarbons will react with oxygen or water (steam), which will affect the coke cleaning process, the cracking reaction must be stopped during coke cleaning. Therefore, the existing oxygen coke cleaning The method and the water (steam) coke cleaning method are both intermittent operations. This alternate method of cracking reaction and coke cleaning will inevitably lead to huge fluctuations in the flow rate and composition of the cracking gas, which will affect the subsequent cracking gas dedusting and separation process.