PPE

Principle of three level protection measures for dust

Dust refers to the solid particles that can be suspended in the air. The dust produced in industrial production is called industrial dust. 1f the industrial dust is not controlled, it will damage the working environment, endanger the health of workers, damage machinery and equipment, and pollute the atmospheric environment

in China, there are many industries and types of work that can produce dust, such as mining and Quarrying of metal and non-metal mines, road construction, tunnel excavation and geological exploration in infrastructure construction, glass manufacturing, refractory and building materials processing. Crushing, grinding, packaging and transportation of foundry industry

the harm degree of dust to human body depends on the amount of dust inhaled by human body, the way of dust invasion, the location of dust deposition and the physical and chemical properties of dust. Among many kinds of dust, asbestos dust and dust containing free silica are the most harmful to human body. Asbestos dust not only causes asbestosis, but also has carcinogenicity; The dust containing more than 70% of free silica is more harmful to human body. The particle size of dust is different, the harm to human body is also different, the dust of 2 μ m to 10 μ m is the biggest harm to human body. 1n addition, charged dust, dust with low solubility, dust with high hardness and dust with irregular shape are harmful to human body

the main ways of dust invading human body are respiratory system, eyes, skin, etc., and the respiratory system is the main way. The harm of dust to various systems of human body is as follows: when dust invades the respiratory system, it will cause pneumoconiosis, pneumoconiosis, lung lesions caused by organic dust, tumor of respiratory system and local irritation; 1f dust invades eyes, it can cause conjunctivitis, corneal opacity, eyelid edema and acute keratitis; Dust invasion of the skin, can block sebaceous glands, sweat glands, resulting in dry skin, susceptible to infection, causing folliculitis, acne, dermatitis and so on

according to the type, concentration and exposure time of dust, according to the national standard classification of occupational hazards of industrial dust (gb5817-86), the occupational hazards of exposure to industrial dust are divided into five grades: grade 0 (in line with sanitary conditions), grade 1 (mild hazard), grade 11 (moderate hazard), grade 111 (high hazard), and grade 11 (moderate hazard), Grade 1V (extremely hazardous). According to the relevant regulations of the state, enterprises and institutions should list class 111 and class 1V dust hazards as the focus of dust control, and health departments at all levels should list class 111 and class 1V dust hazards as the focus of occupational health supervision. The enterprises whose dust hazard reaches grade 1V must be eliminated within one year, otherwise the health department has the right to order them to stop production; During the trial production of new construction, expansion, reconstruction and technical transformation projects, the dust hazard degree must be graded. Those with grade 111 and 1V dust hazard are not allowed to be put into operation; Enterprises with class 11 hazards shall not be promoted to the national level 11 or above< At present, there is no specific treatment for dust hazards, especially pneumoconiosis, so it is very important to prevent dust hazards and strengthen the labor protection management of dust operation. The three-level protection principle should be adopted in the management of labor protection for dust operation: the first level prevention measures include: comprehensive dust prevention, that is, reforming the production process and production equipment, and changing the manual operation into mechanized, automatic, closed and remote control operation as far as possible; The material with high free silica content should be replaced by the material without or with low free silica content as far as possible; 1f the process requirements permit, wet operation shall be adopted as far as possible; Use personal dust-proof equipment and do a good job in personal protection regular detection means that the dust concentration in the working environment is regularly detected to make the dust concentration in the working environment reach the allowable range specified in the national standard physical examination refers to the physical examination of workers before employment according to the relevant national regulations. For those with occupational contraindications, minors and female workers, they are not allowed to engage in the work within the scope of contraindications publicize the basic knowledge of dust prevention to strengthen maintenance, the maintenance and management of the dust removal system must be strengthened to make the dust removal system in good and effective condition the secondary prevention measures include the establishment of a dust prevention organization, the formulation of dust prevention planning and various rules and regulations; Health examination must be carried out for the workers who are newly engaged in dust operations; On the job workers engaged in dust operations must be given regular health examination, and those who are not suitable for dust exposure should be transferred out in time the main measures of three-level prevention are as follows: for the workers who have been diagnosed with pneumoconiosis, they should be transferred from their original jobs in time, and reasonable treatment or recuperation should be arranged. The social insurance benefits of the patients should be handled according to the relevant provisions of the state our website solemnly declares that this article is reprinted by network media, only representing the author’s point of view, and has nothing to do with our website. 1f the information column articles and comments violate your legal rights, please call to let us know and we will deal with them in time

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