Observing System For Measuring The Haze Of Suspended Particles Charge To Mass Ratio

With the acceleration of industrialization and urbanization process in China, environmental problems are becoming ever more serious, especially haze problem, it has become the focus of national concern. When the fog and haze, visibility dropped sharply, affecting flights taking off and landing, resulting in road congestion or even traffic accidents. Fog and haze air pollution intensified, not only for the human respiratory system, immune system, cardiovascular system and other serious impact, but also a serious impact on industry, agriculture, aquaculture, tourism, and even affect national economic development, ecological damage system balance, even life-threatening. In this paper, domestic and haze-related research literature research and found that when the fog and haze, haze particles may be charged for the charged nature of the haze particles study has been ignored by people, which is a very important reason is that in present some experimental techniques is difficult to realize the measurement of charged particles suspended haze properties. For this problem, the text in the current round of haze particles is electrified as the starting point, this paper developed an experimental system to achieve haze particles charge to mass ratio measurements.In this paper, the development of haze charge to mass ratio measuring system consists of three parts, namely haze particulate collection system, haze and particle charge quantity measuring device with haze particles mass measuring device. In the experimental measurements carried out before, this paper first measurement system reliability is analyzed. This section is mainly from three aspects: first, the body charged within the system, will produce a charge loss, which is an insulating verification system; second, because the system measures the charge to mass ratio of particles dynamic haze so we have to consider the haze particles into the system, it will not produce excess charge due to friction, this test performed, we call closed test; third, whether there is a charge accumulation system test. Through the above system, insulating, closed and whether the accumulated charge of the three tests, that we are capable of measuring systems used for experimental studies.We use our self-developed instrument, carried out laboratory and outdoor tests. Includinglaboratory tests for six different combustion sources(coal, foam, incense, cigarettes, clothes, oil)charged nature of the primary emissions(charge to mass ratio) were measured. Through the six sources of combustion soot charge to mass ratio measurements, we find the source of smoke after burning these six are charged by six different measurements for these sources, we can find different combustion sources different charge properties of soot, where coal, incense, cigarettes,oil are negatively charged, while foam and clothes are positively charged, and their charge to mass ratio in the order of between 102-103. For coal, incense, cigarettes, oil are negatively charged, we mean charge to mass ratio of more than six kinds of source after combustion particles in the statistics, statistical results show that: for different combustion sources, charge to mass ratio of electrical resistance, and the size is different. Outdoor experiments comprising: from December2015 No. 4-2015 December 18 measuring haze charge to mass ratio test our new building roof Peking University Institute of Engineering Mechanics carried out, we can get the following conclusions. First, haze particles are charged. The charge to mass Secondly, through our scientific measurements, laboratory experiments charge to mass Bibi haze particles of different sources,three orders of magnitude larger than that, we think this may be due to a discharge of gas after dust,fog and haze occurred in two secondary chemical reactions caused.