Design Of The Foam Decontamination Device

With mixing and foaming device, the foam decontamination device can generate foam according to a certain ratio of four materials, the generated foam injected to the contaminated surface of the target and eliminate pollutants by reacting with biological warfare agents and toxic.The foam decontamination has some advantages such as less water used and good decontamination effects, so it has become a very important developing technology in many countries. The foam can attach to the surface of the contaminated target, and prolong the presence of decontamination agent, so it extends the reaction time and enhance the rate of the pollutants elimination greatly. It needs less water to generate foam, and it depends on the active ingredients in the foam to react with the toxin. After the completion of disinfection, a small amount of water needed to clean foam on the target surface can save water resources. Because of the good adhesion and less production of less liquid waste, it also greatly reduces the chance of secondary pollution.The main work is completed in the steps as follows: 1. Design the overall structure of foam decontamination device.the device includes gas unit, water unit, tank, mixer, control unit, decontamination bracket, and jet.2. Analyze the mixing theory, compare the mixer models and determine to use SV-static mixer for mixing.3. Select the nozzle models based on experimental study.4. Designs the control unit and the layout of the control panel. The control unit includes circuit control, flux and pressure control modules.5. Study the six factors which affecting the foaming performance by orthogonal design, and ultimately determine the best conditions for generating foam.