Air radon daughter removing method and device

Abstract

The invention discloses an air radon daughter removing method and a device for realizing the method. The method comprises the following steps: (10) single-area electrostatic field radon removal: radon-contained air flows through a honeycomb-shaped electrostatic field to remove one part of radon daughters; and (20) electrostatic fiber radon removal: the air flows through an electrostatic fiber filter to remove the remained radon daughters after passing through the honeycomb-shaped electrostatic field. The device comprises an air flue (1), and the honeycomb-shaped electrostatic field (2) and the electrostatic fiber filter (3) arranged in the air flue (1) in sequence in the airflow direction; and the honeycomb-shaped electrostatic field (2) and the electrostatic fiber filter (3) are both connected with the inner wall of the air flue (1) in a closed manner. The air radon daughter removing method and device are compact and simple in structure, are energy-saved, and are high in efficiency.

Description

technical field [0001] The invention belongs to the technical field of air purification, in particular to a method and device for removing air radon daughters with compact and simple structure, energy saving and high efficiency. Background technique [0002] The air contains radon gas and radon daughters. After the radon gas is inhaled by the human body, most of it can be excreted from the body, which is less harmful to the respiratory tract. The radon daughters are metal particles, which are easily trapped by the respiratory tract, accumulate locally and decay in situ. The alpha particles produced by the decay can destroy or change the molecular structure of DNA in human cells, leading to abnormal cell division, and eventually may induce lung cancer. [0003] In order to remove radon daughters contained in the air, the Chinese invention patent "A method for removing radon daughters in the air" (application number: 201210278469.2, publication date: 2012.11.7, authorization ...

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Problems solved by technology

[0005] 1. Complex structure, large volume, and high cost: This method relies on the double electric field formed by the circular tube type high-voltage electrostatic field and the flat plate type high-voltage electrostatic field. The long distance of air flow makes the structure of the device complex, the thickness increases, and the space occupied is large; in addition , The circular hole-shaped electrostatic field is made by fixing the circular hole electrode on the metal plate. Due to the influence of the circular hole-shaped structure, there is an invalid ventilation area between the holes, resulting in a small effective ventilation area. In order to ensure the ventilation rate , it is necessary to further increase the volume of the device; finally, the processing technology of the circular hole-shaped electric field is complicated, so that the cost of the device is relatively high;

[0006] 2. Large power consumption and high control requirements: This method uses a circular tube-type high-voltage electrostatic field and a flat-plate high-voltage electrostatic field in series. Each electric field needs to be powered and controlled separately, which not only consumes a lot of energy, but also requires high control.

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