What are the three kinds of air purification respirators

Air purification respirators are mainly divided into the following three types:

1. Filter type respiratory protector

The filter type respirator is based on the wearer's own breathing as the power to filter and purify harmful substances in the air. It is suitable for the place where the concentration of harmful substances in the air is not very high and the oxygen content in the air is not less than 18%, there are two kinds of mechanical filtration and chemical filtration.

Mechanical filter type: It is mainly a dust mask for preventing various dust and smoke and other solid harmful substances with large particles. Its filtration and purification rely on the mechanical blocking effect of porous filter material. Can be divided into simple and compound two, simple filter material directly into a mouth and nose mask, simple structure, but the effect is poor, such as general gauze masks. The compound divides inhalation and exhalation into two paths, each controlled by two valves. Good performance filter material can filter out fine dust, good ventilation, small resistance.

Chemical filter type: a simple gas mask with a gauze filter mat immersed in the agent, and a gas mask in general, consisting of a thin rubber mask, a short leather tube, a medicine pot three parts, or directly connected to one or two medicine boxes on the mask, such as some harmful substances do not stimulate the skin or mucous membranes, do not use a mask, only a mask with a medicine box (also known as half mask). Gas mask (mask) should meet the following health requirements: filter toxicity can be good, filter.

2. Self-contained air breathing apparatus

This type of respirator provides air for breathing by means of a cylinder or air storage bag. They are suitable for environments that require independent gas supply, such as places with high concentrations of toxic gases or low oxygen content, such as chemical plants, sewage treatment plants, etc.

3. Electric Supply Air Filter respirator (PAPR)

Electric supply air filter respirator, referred to as PAPR, also known as electric air purification respirator, refers to the protective equipment that supplies filtered air that meets the atmospheric quality standards to the user through the catheter under the action of the fan, electric filter and other devices. According to different product forms, PAPR can be divided into full mask PAPR, head mask PAPR, half mask PAPR and so on. PAPR is mainly composed of mask, power device, filter device, air supply system, pressure regulator and other parts, with high protection, easy to wear, lightweight washable, reusable and other characteristics, suitable for dust, smoke pollution, chemical pollution, smoke pollution, toxic and harmful gas pollution and other workplaces, but not suitable for hypoxia, explosive, IDLH concentration and other workplaces.