A kind of dust removal method and system for thermophoretic deposition of fine particles

Abstract

The invention relates to a fine particle thermophoretic deposition dedusting method and a system thereof. The system is mainly composed of a thermophoretic deposition deduster, a waste heat lithium bromide refrigeration system, a gas heating device and an electric appliance control system. According to the invention, dust-laden air flow flows into a gas insulating chamber from a dust-laden air-flow inlet, then is introduced into a square plane cold wall pipe under effect of an induced draught fan and performs thermophoretic deposition movement, the air flow flows out from the square plane cold wall pipe and then continuously and downwardly flows due to effects of inertia and negative pressure effects, then the air flow is discharged through an air-flow outlet 69 from a negative pressure chamber until the air flow at the bottom of a conical cylinder is slowly risen, and the air flow is introduced into an inlet of the induced draught fan, so that a purpose of separating gas and dust can be realized. The method takes on-site practical tests as a base, a theoretical equation is taken as a reference, the organic combination of the theoretical equation and the on-site practical tests makes that the control of the thermophoretic deposition system and the practical condition are matched, so that the deduster has high thermophoretic deposition rate. The lithium bromide waste heat is used for refrigeration, so that energy is saved, and the environmental protection is realized.

Description

technical field [0001] The invention is applied to the principle of thermophoretic force under the condition of temperature gradient to solve the technical problem of dust removal of micro particles. [0002] Its basic principle is the ultra-fine particles existing in the airflow with non-uniform temperature field. From the perspective of microcosmic analysis, its surface will be subjected to irregular oblique collisions of gas molecules flying from the cooling zone and the hot zone. During the oblique collision, the tangential momentum of the gas molecules flying from the hot zone is greater than that of the molecules flying from the gas in the cold zone, which will bring considerable tangential momentum to the particle surface. From a macroscopic point of view, it is reflected in the fact that gas molecules exert a tangential force on the fixed wall surface opposite to the direction of the temperature gradient, and the temperature gradient is parallel to the particle wall s...

AI Technical Summary

Problems solved by technology

In order to reduce the harm and influence of fine suspended particles and solve the above-mentioned problems, the dust removal problem of PM2.5 fine suspended particles must be solved first, but the existing mature dust removal technology is restricted by the structural principle and cannot solve the problem at all

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