Device Developed Based On Adsorption Catalytic Indoor Harmful Gas To Clear

VOCs which is released by building materials, such as binder, paint and so on, has been the source of bad indoor air quality with large-scale use of modern building materials. VOCs results in neurotoxicity, nephrotoxicity, liver toxicity (hepatotoxicity) and carcinogenicity. VOCs does so great harm to people's health that cleaning indoor VOCs is necessary and urgent.Conventional technologies such as adsorption, condensation, membrane separation, biological degradation, catalytic combustion have been used to clean VOCs. Emerging technologies such as photocatalysis, plasma, ultraviolet oxidation are also used in recent years. Adsorption technology and catalytic combustion technology (adsorption catalysis technology for short) are better than other technologies because of mature technology and good cleaning effect. So researching indoor VOCs cleaner which is based on adsorption catalysis technology is of great significance and application value.What has been introduced in this paper includes several parts as below:1,Integrated program of the indoor VOCs cleaner which is based on adsorption catalysis technology is raised. The cleaner is of rotary structure. It is full of cellular material between the revolving shaft and shell of the rotating wheel. Ga-X molecular sieves with high adsorption capacity and stable structure are adhered to cellular material. The rotating wheel is divided into two parts. One part is adsorption zone which adsorbs harmful air, while another part is desorption zone which is used for dsorption. After dsorption, the harmful air is processed with catalytic combustion method. Adsorption and dsorption work alternately, so that the cleaner can run consecutively without saturation of adsorbents.2,Digital discrete fuzzy-pid control algorithm is designed according to the cleaner. First , subdivision control mode works switch VOCs consistency in different sections. Second, traditional incremental PID algorithm is turned into digital incremental PID algorithm within certain range of VOCs consistency, finally, output is obtained by inquiring the fuzzy control decision-making table. 3,Design the hardware and software of the control system. A good control system results in better cleaning effect, the reverse is also true. The hardware and software designs of the key modules such as LCD display, keyboard, touch screen, detection of VOCs consistency are described in detail. How to use digital discrete fuzzy-pid control algorithm into adsorption and dsorption is emphasized.The practical application shows that the cleaner has strong adsorption capacity and runs steadily. VOCs can be cleaned consecutively.