Method for Determination of Collection Efficiency of Inhalable Particulate Matter PM10 in Electrostatic Precipitator
An electrostatic precipitator and collection efficiency technology, applied in the field of environmental pollution, can solve the problems of inhalable particulate matter (PM10 pollution, etc.), and achieve the effect of improving dust removal efficiency and high precision
Inactive Publication Date: 2011-12-21
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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[0003] The present invention is aimed at the increasingly serious problem of existing inhalable particulate matter (PM10) pollution, and proposes a method for determining the capture efficiency of inhalable particulate matter PM10 in an electrostatic precipitator, combining theoretical research and engineering background of electrostatic precipitators at home and abroad, and establishing The mathematical model of the PM10 capture efficiency of the electrostatic precipitator was established, and the PM10 classification efficiency was calculated by using the Deutsch-Anderson method. Based on this, the Weibull distribution was fitted to the PM10 classification efficiency change curve. It has been verified that the fitting method has high precision
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[0018] Solution of electrostatic precipitator PM10 collection efficiency:
[0019] First, solve the flow field, particle field and electric field of the electrostatic precipitator: the basic conservation equations of flow field, particle field and electric field: mass conservation equation, momentum conservation equation, current continuity equation and Poisson equation, in order to facilitate the above control equations analysis, a general form of the governing equations is established. use Representing the general variable, the governing equation can be expressed as:
[0020] (1)
[0021] In the formula, --Air density; ——Universal variable, which can represent the velocity components in each direction; - generalized diffusion coefficient; - generalized source term, —Hamilton operator. The terms in the formula are the transient term, the convection term, the diffusion term and the source term in turn. For a specific equation, , , Also ha...
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The invention relates to a method for determining the trapping efficiency of an electrostatic dust collector on inhalable particulate matters (PM10). The method comprises the following steps of: with a simplified model of a wiring board electrostatic dust collector as a research object, counting electric charges of an electric field and diffusion electric charges and establishing a mathematical model of an internal flow field, the electric field and a partical size field of the electrostatic dust collector by a FLUENT loading model and a customized function; and performing numerical calculation by a finite volume method (FVM), calculating the grading efficiency of PM10 partical groups by a Deutsch-Anderson method, and performing Weibull distribution fitting on the grading efficiency of the PM10 partical groups by a least square method with curves of changed partical sizes of particles. According to verification, the fitting method is high in accuracy and can be used as the reference of the method for calculating the trapping efficiency of the electrostatic dust collector on PM10, and the predictability of the dust collection efficiency is improved greatly.
Description
technical field [0001] The invention relates to a technical problem of environmental pollution, in particular to a method for determining the collection efficiency of inhalable particulate matter PM10 of an electrostatic precipitator. Background technique [0002] With the rapid development of industry, the pollution of inhalable particulate matter (PM10) is becoming more and more severe. PM10 will not only reduce air quality, trigger global climate change, but also induce various human diseases. Electrostatic precipitators have a high capture efficiency for PM10, but PM10 still accounts for a large proportion of particulate matter emitted by ESP, so it is very important to study the capture of PM10 in ESP. At present, scholars at home and abroad have carried out a series of work on the capture of PM10 by electrostatic precipitators, using various methods and exploring the characteristics of PM10 capture by electrostatic precipitators from different aspects. Contents of t...
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IPC IPC(8): B03C3/00
Inventor 张建平
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER