大气污染考试题和答案（Air pollution test questions and answers）.doc

大气污染考试题和答案（Air pollution test questions and answers） Greenhouse effect: in the atmosphere, due to the accumulation of certain gases, the energy of the outer space of the atmosphere ACTS as a one-way filter, resulting in a rising equilibrium temperature between the atmosphere and the ground. The corresponding particle size of the curve of the curve of F curve and the corresponding particle size of the curve of P curve. Median longitude: F = 50% corresponding to d50 on the F curve. Adhesiveness: dust particles attach to a solid surface, or particles attach to each other. Type of force: molecular force, electrostatic force, capillary gravity. Wettability: the ability of dust particles to attach to or attach to a liquid after contact with the liquid is called the wettability of the dust. Influence factors: dust: species, sphericity, particle surface smoothness, moisture content. Liquid: type, contact with particles. Environmental factors: temperature, pressure. Influence of the efficiency of cyclone dust collector: secondary effect, proportion size, physical property and operation variables of smoke and smoke. The main factor that affects the efficiency of electrostatic precipitators (1) the particle factor: 1, 2, charged particle size 3, than resistance than high resistance - poor conductivity - dust layer - the potential efficiency is lower than the low resistance - secondary backmixing - efficiency by 4, concentration levels - corona occlusion, (2) the lower the efficiency of structure size: 1, f = A/Q increases efficiency increases, the distance between the plate: 2 d lower efficiency increase 3, taller than: higher L/H increase efficiency (3) operating conditions: 1, into the gas velocity Into the gas speed drop efficiency 2, catch rate increases efficiency rise three escape rate, air bypass: 5% efficiency is less than 90% 4 and secondary dust control: dust elimination frequency to appropriate, according to the scene Power plant breakdown: the voltage exceeds the b