Waste gas recovery system for silicon carbide smelting process

Abstract

The invention relates to an exhaust gas recovery system of a silicon carbide smelting technology. The exhaust gas recovery system comprises branched pipe exhaust gas recovery systems which are used for filtering and collecting exhaust gas from branched pipes and detecting an oxygen concentration, a total pipe exhaust gas recovery system which is used for collecting exhaust gas collected by the branched pipe exhaust gas recovery systems, detecting an oxygen concentration of the exhaust gas and controlling exhaust gas high-altitude discharge or introduction into a gas conveying pipe, and a gas conveying system which is used for collecting exhaust gas transmitted by the gas conveying pipe, filtering the exhaust gas, detecting a gas concentration and conveying the filtered gas into a gas application unit. The exhaust gas recovery system realizes real time monitoring and control of an oxygen concentration of exhaust gas, prevents explosion caused by mixing of a lot of carbon monoxide and oxygen, guarantees worker safety, prevents property loss, and realizes recycle of a lot of carbon monoxide exhaust gas produced by a silicon carbide smelting technology and conveying of the gas to gas application units.

Description

technical field [0001] The invention relates to a waste gas recovery system, in particular to a waste gas recovery system for detecting and recovering a silicon carbide smelting process. Background technique [0002] Since American Acheson began to smelt silicon carbide with a linear trough resistance furnace in 1891, with a history of more than 100 years, there are more than 200 silicon carbide smelting enterprises in my country, with an annual production capacity of more than 2.2 million tons. Silicon carbide processing sand making micropowder production enterprises are mainly distributed in Henan, Shandong, Jiangsu, Jilin, Heilongjiang and other provinces. [0003] Silicon carbide (SiC) is smelted from quartz sand and coal at high temperature in a resistance furnace. Because the coal is not burned but smelted by resistance furnace heating, a large amount of carbon monoxide is produced, and the basic concentration reaches about 70%. Major foreign companies have basically ...

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Problems solved by technology

However, during the recycling process, a large amount of carbon monoxide is mixed with oxygen in the air. If there is no corresponding detection and control method, it is very easy to explode, resulting in casualties and property losses.

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