Оценка времени работы пылеуловителя со скругленными сепарационными элементами

Abstract

The study is focused at the development of new technical devices for separating dust particles up to 10 microns in size from flue gases of thermal power plants, along with the creation of an engineering methodology for the proposed separation device and obtaining calculated dependences for determining operational maintenance intervals. In order to determine the efficiency of particle deposition on the surface of the separation device, previously verified methods of mathematical modelling were used based on the laws of momentum and heat conservation, as well as a solution to hydrodynamics equations. The proposed original trapezoidal separator design is equipped with several rows of arcuate elements for concentrating dust during the operation of the apparatus due to the action of inertial and centrifugal forces. With an increase in the input velocity of the gas flow from 3 to 11 m/s and efficiency values of 0.5, 0.7 and 0.9, the operation time of the separator is decreased by an average of 3.7 times. The minimum operation time is established to be about 50 days at a dust flow rate of 11 m/s and a dust concentration of 8 mg/m3. The maximum operation time of the separator was determined to be about 465 days at a dust flow rate of 3 m/s and a dust concentration of 5 mg/m3. The proposed design of the trapezoidal separator ensures the separation of particles both larger and smaller than 10 microns from the flue gases of thermal power plants with an efficiency of 99.0-99.9 and 61.7%, respectively, resulting in reduced atmospheric emissions. Using the developed methodology, the main structural dimensions of the proposed separator can be determined under given gas flow parameters.