US 2021/0102880 A1 · DUST MEASUREMENT DEVICE AND METHOD

Abstract

The present invention relates to a dust measurement device and method which can increase the accuracy of dust measurement by deriving a mass concentration on the basis of a number concentration distribution according to particle sizes. The dust measurement device of the present invention comprises: a charging unit for charging a feed material with electrical charges; a first dust collecting unit including a first and a second dust collecting electrode which are spaced apart from each other, through which the material passes, and to which different voltages are applied; a second dust collecting unit for collecting the material which has passed through the first dust collecting unit; a current measurement unit for measuring current flowing through the second dust collecting unit; and a control unit for calculating a mass concentration of the material by using the value of the current measured by the current measurement unit and adjusting voltages applied to the charging unit and the first dust collecting unit on the basis of the mass concentration.

Claims19

Dependent claims

A dust measuring apparatus comprising:

an electrifier for electrifying introduced dust;
a first dust collector including first and second dust collecting electrodes arranged to be spaced apart from each other, wherein different voltages are respectively applied to the first and second dust collecting electrodes such that the first and second dust collecting electrodes collect the electrified dust;
a second dust collector for collecting the dust passing through the first dust collector;
a current measuring unit for measuring a current flowing in the second dust collector;
and
a controller configured to:
use a current value measured in the current measuring unit to calculate a number concentration and an average particle size of the dust;
use the calculated number concentration and average particle size to calculate a number concentration distribution based on a particle size;
calculate a mass concentration of the dust based on the calculated number concentration distribution;
and
adjust voltages respectively applied to the electrifier and to the first dust collector based on the mass concentration.

8 more elements

Dependencies are inferred from the claim text.

Dust measurement device and method

Life of this patent

Dust measurement device and method

Life of this patent

Abstract

Claims19