Natural Attenuation Test of Cigarette Particulate Pollutants Using Air Purification Test Chamber

Natural Attenuation Test of Cigarette Particulate Pollutants Using Air Purification Test Chamber

The natural decay test of the particulate shall be performed according to the following steps:

a) Place the cleaner-under-test into the purifier CADR test chamber. Adjust the cleaner to the rated test condition, check for normal operation, and then switch off the cleaner;

b) Arrange the sampling points to keep away from the air inlet and outlet, keep the distance from the wall more than 0.5 m, and keep the height relative to the ground of the test chamber to be 0.5-1.5 m. 1 sampling head is arranged at each sampling point and is connected with the sampler outside the Air Purification Test Chamber;

c) Determine the test record document;

d) Start the high efficiency air filter and clean the air in the CADR test chamber, so as to ensure that the particle background concentration of the particulate with the diameter more than 0.3μm is lower than 1000/L. At the same time, start the temperature and humidity control device to ensure that the indoor temperature and the relative humidity reach the specified state;

e) After the particulate background concentration is reduced to the suitable level, record the particulate background concentration, switch off the high efficiency air filter and the humidity control device, and start the stirring fan and the circulating fan. Place the standard cigarette into the cigarette burner, and connect the cigarette smoke outlet with a tube passing through the wall of the CADR test chamber. The exhausted smoke may be caught into the air eddy formed by the agitation of the stirring fan. After reaching certain volume, close the valve of the smoke delivery pipe. The stirring fan agitates for 10 minutes again to cause the particulate pollutants to be evenly mixed. Then switch off the stirring fan. The circulating fan is always switched on in the test.

f) After the stirring fan stops rotating, determine the initial concentration c0 of the particulates with the laser dust particle counter. The particle concentration of the particulates with the diameter more than 0.3μm shall be 2X106/L ~ 2X107/L at the beginning of the test. The corresponding time t = 0 min in the calculation;

g) After the initial concentration (the first sampling point for natural decay) in the Air Purification Test Chamber is determined, the particulate concentration is determined and recorded every two minutes. The starting time t for the second sampling = 0 min, and the continuous determination duration is 20 min;

h) Record the temperature and the relative humidity in the purifier CADR test chamber in the test.