Kind of Online PM2.5 Concentrated Collection Instrument

摘要

A kind of online PM2.5 concentrated collection instrument and method are provided including five parts: PM2.5 cutting head, water tank system, virtual cropping system, condenser circulation system and online concentrated collection system. Connected with PM2.5 cutting head, a water tank system contains water tank, electrical heating rod and temperature-controlled digital display device. Virtual cropping system contains virtual cutter, concentrated air vacuum pump, and main air vacuum pump. The condenser circulation system circulating condensate condenses to grow the saturated particles, condenser circulation system contains condensate circulation tube, condensing machine. The online concentrated collection system contains biological sampling bottle, solenoid valve with relay, automatic distillate collector and computer subdivision constant-current pump. Real PM2.5 samples could be concentrated by this instrument to 7-10 times with high efficiency which would provide technical support for the following on-line chemical component or toxicity test.