The Research And Application Of Plasma Technology Cleaning Harmful Gases

A more effective method is needed to dispose the emergency of ammonia leaking, because industrial accidents especially harmful gases leaking are increasing, with the development of China’s social economic and the acceleration of modernization. In recent years, a lot of traditional methods for emergency are still used in the industrial production, such as combustion, absorption, catalytic conversion, adsorbent method, biological treatment, etc. These methods of treating the leakage of harmful gases are unable to cope with emergencies, and are vulnerable to space constraints and also these methods can’t be used twice and can cause secondary pollution in some cases, so it become a new topic to research a new method to cope with the leakage of harmful gases. This paper is based on the project’ the device’ s research used for coping with the leakage of ammonia and chlorine’. This project is from the Science and Technology Commission of Beijing, and a factory is chose as the place of doing experiments. This paper is about cleaning harmful gases using plasma technology, and the main contents are as follows:Firstly, harmful gases cleaning technology, especially plasma technology is analyzed. On the basis of field investigation, ammonia is chose as the object of the paper, and according to these, the purpose of the paper is to design an effective and moving plasma device of coping ammonia leakage under high wind. And make sure when the concentration of ammonia is less than1000pm, the cleaning efficiency of plasma devices can reach to50%. The dielectric barrier discharge plasma method is confirmed for this study in the case of large amount of wind and large contact areas. And a lot of investigations have been done to prove the process of DBD plasma cleaning ammonia. Secondly, a series of experimental studies have been done to design a matrix of dielectric barrier discharge plasma reactor, including the design of its specific parameters (including the device size and spacing parameters, etc.). And the plasma generation power supply has been designed taking into account the voltage, frequency and other parameters.Thirdly, the plasma device is designed and integrated, with the collaboration of a professional company. The device includes five parts: double dielectric barrier discharge system, power supply and power control systems, efficient air distribution diversion systems, sprinkler irrigation system, security system. Among them, the former two parts are based on plasma purifier.Fourthly, in order to obtain the cleaning efficiency of plasma devices, simulated experiments of ammonia leaking have been done to get the parameter of the device. It is confirmed that the cleaning efficiency of plasma devices can reach to50%, and the problem has been solved.