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Domestic semiconductor factories use many types of harmful chemicals and dangerous substances due to the needs of special application processes. However, these chemicals and dangerous substances are highly reactive hazardous substances with flammability, explosiveness, corrosion, oxidative toxicity, etc., such as: HF, Cl2, HCl, HBr, SiF4, BCl3 or hydrochloric acid、sulfur dioxide、Hydrogen sulfide、nitric acid, and so on. Therefore, semiconductor factories must use local scrubbers to burn and wash machine equipment to decompose various inert, toxic, spontaneous combustion, combustion-supporting and flammable gases, and to neutralize liquid chemicals with strong acids or strong alkalis. However, if these gaseous or liquid chemicals are stored, transported, replaced acid barrels and cylinders, pipeline transportation, process reaction, and tail gas treatment, If not handled properly, it may result in heavy losses and cause immediate harm. In view of this, semiconductor factories use various management methods to achieve appropriate risk control. How to make the semiconductor industry do a good job in risk management, factory supply system facilities, production machines and process hazard analysis are key steps. In today's global warming, the reduction and follow-up treatment of greenhouse gas PFCs is an important issue. This study is aimed at the reduction of manufacturing process in the semiconductor industry and the reduction of emissions after plasma washing treatment. The research results show that when CF4 gas in PFCs is destroyed and cracked at high temperature, the concentration of waste gas subjected to pyrolysis is reduced by increasing N2, O2, and H2. The best decomposition and removal efficiency is measured by FTIR Huo's infrared spectrometer. Experiments were carried out under the conditions of plasma cracking power of 1000 W, total inflow rate of 5 slm, and CF4 inflow rate of 10 sccm, and it was found that adding oxygen and hydrogen can obtain a higher DRE value (67.9%) and have higher energy efficiency The experimental results (2.87 g/kWh) indicated that the addition of different diluent gases can help improve the decomposition and removal efficiency of CF4. Key words: plasma cracking treatment, scrubber, gas, PFCs
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