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Anonymous users2024-02-13For the surrounding environment, the ions in the air are charged, and the fiber dust with a large concentration is very easy to cause fire due to the accumulation of static electricity and friction. For humans, fiber dust can be in the respiratory tract without respiratory protective equipment.
Lumps, easy to cause respiratory diseases, after years of accumulation, pneumoconiosis.
There it appeared. Therefore, as far as possible, the body is not completely exposed to dust, and it is also equipped with corresponding protective equipment, such as non-woven masks with anti-static function. Wish.
can help you.
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Anonymous users2024-02-121. It is necessary to ensure that the workplace meets the requirements of the standards and specifications, and it is strictly forbidden to set up in illegal multi-storey houses, factories and residential areas where the safety spacing is not up to standard.
2. The ventilation and dust removal system must be designed, installed, used and maintained according to the standard specifications, and the dust must be detected and cleaned up according to the regulations in each shift.
3. Explosion-proof electrical equipment must be used in accordance with the specifications, lightning protection, anti-static and other measures must be implemented to ensure that equipment and facilities are grounded, and all kinds of open flames and illegal use of work tools are strictly prohibited in the workplace.
4. It must be equipped with waterproof and moisture-proof facilities for the production, collection and storage of metal dust such as aluminum and magnesium, and it is strictly forbidden for dust to spontaneously combust when wet.
5. Safety operating procedures and labor protection systems must be strictly implemented, and it is strictly forbidden for employees to fail to pass the training and not wear and use dust-proof, anti-static and other labor protection supplies in accordance with the regulations.
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Anonymous users2024-02-11Severe. The discharge of sewage from the paper mill is quite large, and the pollutants are mainly heavy metals, which are harmful to the human body. Water pollution is among the best in a variety of industries; Exhaust gas, solid waste and noise are seriously polluted.
Papermaking should be washed with water, wool cloth rinsed with water, net dragon, diluted pulp with water, and pulp and paper machines will be washed with water. <
Severe. The discharge of sewage from the paper mill is quite large, and the pollutants are mainly heavy metals, which are harmful to the human body. The paper industry is a light industry with large output, large water use and serious pollution; Water pollution is among the best in a variety of industries; Pollution such as exhaust gas, solid waste and noise is also serious.
Papermaking should be washed with water, wool cloth rinsed with water, net dragon, diluted pulp with water, washed with water for pulping, paper machines and other sites will produce wastewater or a large amount of wastewater. Coal-fired boilers produce hot steam to dry paper sheets, and the combustion of coal produces harmful gases that cause air pollution. Recently, with the use of environmental protection equipment, treatment projects and other purification measures, water and air pollution has improved.
How to reduce the discharge of papermaking wastewater:
1. The paper industry should have a unified management organization and management system, and strictly control the new plant and the expansion plant. At present, the General Association of Light Industry, the Ministry of Forestry, and the Ministry of Agriculture all control pulp and paper mills, and should cooperate with each other to formulate unified regulations.
2. For pulp and paper mills with a daily output of more than 50 tons of chemical pulp, the products and economic benefits are better, and the alkali and pollution-free bleaching system and the "three wastes" treatment system should be established to achieve standard discharge and civilized production.
3. For the mill that produces pulp with the above-mentioned less polluting pulping method, although the black liquor pollution is reduced, it is also necessary to adapt measures to local conditions, adopt medium and high concentration chlorine-free bleaching technology, adopt effective comprehensive utilization methods and "three wastes" treatment measures, and achieve standard discharge, and if it cannot meet the standard discharge temporarily, it should also be transformed within a time limit.
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Anonymous users2024-02-10The paper industry will cause a large amount of industrial rotten pulp, slurry residue,PyritePollutants such as slag, coal ash, slag, dust, etc.
The pollutants in the paper industry are small in volume and most of them are powdery and easy to remain in the groundwater, so the leached turbid water pollutes the groundwater source. The pollution produced by the paper mill is mainly reflected in water pollution, and the pollutants are mainly heavy metals, which are very harmful to the human body. The output of the paper industry is large, the water is abundant, and the degree of water pollution is among the best in the industry; Exhaust gas, solid waste.
and noise pollution, which should not be underestimated.
Pollution in the paper industry:
After entering the 21st century, with the improvement of people's awareness of environmental protection, the paper industry has gradually paid off the historical debts of environmental protection, biological water treatment facilities, alkali facilities, VOC collection and treatment facilities, sludge and other solid waste treatment facilities, as well as a large number of developed countries.
The advanced cleaner production facilities that have been adopted or have not yet been used have been widely used in China's paper industry.
At present, China's emission standards are also the most stringent in the world, and the unit emissions of major pollutants of newly established large enterprises have reached the advanced or leading level in the world, especially the chemical oxygen demand per unit of product wastewater.
It has been reduced from 332 kilograms of product at the beginning of 2000 to less than kilograms of products at the end of 2015.
Sulfur dioxide in flue gas.
The emission per unit of product was reduced from kilogram tons of product to kilogram tons of product, a reduction of 67%, and the displacement per unit of product was reduced.
by an average of 103 cubic meters.
Tons of products have been reduced to 22 cubic meters of products, a reduction of 79%, so that the average emission level of the industry has reached the international leading level, and the paper industry has been separated from the team of highly polluting industries and began to develop rapidly in the direction of green paper.
The paper mill discharges three streams of water according to the process, one is the pulp cooking waste liquid, commonly known as papermaking black liquor; the second is the washing, sorting and bleaching of pulp after separating black liquor, also known as middle water; The third is the white water on the papermaking machine, which can be reused after treatment. The middle section of water is the part left over from the incomplete extraction of black liquor, which should account for less than 10% of the total amount. The pollutants contained in the black liquor account for more than 90% of the total pollution discharge of the whole plant. >>>More
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This red color may be used in the factory, and the main pollutants emitted during the papermaking process are: >>>More
Theoretically, the paper mill can not be distributed near the river, because in the papermaking process, a large number of chemicals (such as hydrochloric acid, sodium hydroxide, hydrofluoric acid, sodium hypochlorite, sulfonic acid, etc.) are not strong acid, strong alkali, or highly toxic chemicals, extremely harmful to the human body, the used chemicals will not lose their efficacy, will still cause great harm to people and the environment, if the paper mill is opened near the river, the paper long wastewater will be discharged into the river, down the river, will cause a large area of river water pollution, People will not be able to drink the water in the river, and even if it is treated, it will not be absolutely pollution-free. But the impact of the treated water on people or the environment is relatively small, for us, no one wants to drink polluted water, so in the construction of paper mills or some chemical plants are to avoid building on the riverside, especially in the upper reaches of the river, but some illegal operators are still built on the river to reduce the high cost of sewage treatment, which is illegal, so we must resolutely avoid this kind of thing, once found, we will immediately report, let ** to ban them, to ensure that our drinking water is clean and ecological balance
The control of waste gas in the pulping process of the paper mill is mainly reflected in three aspects: first, the odor generated in the pulping production process will be sent to the alkali boiler for combustion through a complete sealed conveying system, such as NCG non-condensing gas from the pulp line, evaporation tank, causticizing and stripping tower, its composition contains H2S, CH3SH, CH3SCH3, CH3SSH3 and other sulfur-containing compounds, and also contains turpentine, methanol, water vapor, nitrogen, oxygen and other gases, which are corrosive. Toxic and explosive. Therefore, not doing the necessary ** NCG is bound to have a significant impact on air quality. >>>More