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Chemical pollution refers to the waste gases and pollutants produced in the production process of the chemical industry, most of these wastes are harmful above a certain concentration, and some are highly toxic substances, which will cause pollution when they enter the environment. Some chemical products will cause some pollution during use, which is even more serious and widespread than the pollution caused by the production itself.
Waste emitted from chemical production processes.
1) Combustion process.
The vast majority of chemical production processes are carried out at a certain pressure and temperature, and as such, there is an energy input, which is usually obtained by burning large amounts of fuel. However, in the process of fuel combustion, a large amount of exhaust gas and smoke will inevitably be generated, which will cause great harm to the environment. The content of various harmful substances in the flue gas has a great relationship with the variety of fuel.
2) Cooling water.
In addition to the large amount of thermal energy, the chemical production process also requires a large amount of cooling water. In the production process, there are two ways to cool with water: direct cooling and indirect cooling. When direct cooling is used, the cooling water is in direct contact with the cooled material, and this cooling method can easily make the water contain chemical materials and become polluting substances.
When indirect cooling is used, although the cooling water is not in direct contact with the material, because preservatives are often added to the cooling water.
Chemicals such as algaecides can also cause pollution problems when discharged, and even if the chemicals are not added, the cooling water can cause thermal pollution to the surrounding environment.
3) Side reactions.
In chemical production, the main reaction is often accompanied by a side reaction and some undesirable by-products. Although it can be a by-product, the number of by-products is often not large, and the composition is relatively complex, so that the by-products must face technical and economic problems, so in fact, the by-products are often discarded as waste, so it will cause environmental pollution.
4) Production accidents.
caused by chemical pollution.
A production accident that occurs frequently is an equipment accident. In chemical production, because many raw materials, semi-finished products or finished products are corrosive, containers, pipelines, etc. are easily corroded and damaged by chemical raw materials or products. Occasional production accidents are process accidents, such as chemical production process reaction conditions are not well controlled, or catalysts are not replaced in time, or a large amount of exhaust gas and liquid is discharged for safety, or unwanted substances are produced.
This kind of exhaust gas, waste liquid and unwanted substances, the quantity is larger than usual, and the concentration is higher than usual, which will cause serious pollution for a while.
In short, the waste emitted by the chemical industry is nothing more than three forms of substances, namely waste gas, waste water and waste residue, which are collectively referred to as the "three wastes" of the chemical industry. However, any waste itself is not an absolute "waste", in a sense, any substance is useful to human beings, and once people use waste wisely, it is completely capable of "turning waste into treasure".
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Chemical plants are more polluting and harmful. It's like air pollution, water pollution. However, there are still dangers for people who work in chemical plants.
I don't know if you know about occupational diseases. Anhui gold standard can be carried out, water quality testing, occupational disease hazard factor detection and evaluation, indoor air quality testing, etc.
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This largely depends on the treatment of waste gas, wastewater, waste, etc. by chemical plants; It is also related to the production process of the products produced in the chemical plant.
If the weather is bad, such as the temperature inversion, the pollution is not easy to spread, and the concentration of pollutants around the chemical plant is very high, which may cause the residents around the chemical plant to feel unwell.
Exhaust gases, in dry weather, may not cause great harm to the human body in the short term, but long-term exposure to a bunch of chemicals can have chronic effects; In the event of heavy rainfall, these pollutants may pollute the river, and the pollutants will be diluted by the flowing water, which may affect people's drinking water and indirectly affect people's physical health.
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The correlation between chemical production and environmental pollution depends mainly on the production process and management methods. The manufacture of chemicals often involves complex processes, such as air integrity and waste. If not disposed of correctly, these wastes can cause pollution to the environment.
However, in recent years, environmental awareness and management regulations have been strengthened, chemical enterprises have paid more attention to the treatment and prevention of environmental pollution, and at the same time introduced high-tech, low-pollution production processes and environmental protection technologies. These processes and technologies can effectively reduce the environmental impact of chemical production and waste, and even achieve zero emissions from actual rubber sheets.
Therefore, chemical production does not necessarily lead to environmental pollution, the key lies in whether the enterprise follows the environmental regulations and norms, and takes appropriate environmental protection and governance measures to reduce and eliminate the impact on the environment.
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Not necessarily, there are chemical production without pollution.
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Yes, because the waste of chemical products is a composite that does not exist in nature and is difficult to decompose automatically.
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1. Poison the air; 2. Damage to the human body; 3. Polluting water sources; 4. Corrosion equipment; 5. Cause**; 6. Causing fire; 7. Destroying buildings; 8. Increase consumption; 9. Endangering agriculture; 10. Affect the factory capacity.
The production process refers to the work, methods, and technologies in which production workers use production tools and equipment to process or treat various raw materials, materials, and semi-finished products, and finally make them into finished products.
It is the operation and technical experience accumulated and summarized by people in labor, and it is also the technical regulations that production workers and relevant engineering and technical personnel should abide by. Good production process is the premise and guarantee for the production of low-cost and high-quality products.
The implementation of the production process must be guaranteed by good production technology and organizational measures. Any kind of production process has a certain relative stability and cannot be arbitrarily changed; But it is not static, but constantly improved with technological progress and the updating of production equipment. The determination of the production process generally needs to go through certain process preparations.
For example, the process analysis and review of product drawings, the preparation of process plans and process documents, and the technical and economic evaluation of engineering and art plans. The main basis for selecting the production process is: the characteristics of the raw materials, the use of the product, the quality and accuracy requirements, the economic effect, the existing technology and equipment level, etc.
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There are many types of exhaust gases emitted from chemical plants, depending on the raw materials and production processes used in chemical production. Common chemical off-gases include:
4.Volatile organic compounds: mainly volatilized from organic solvents and products such as ethylene, propylene, benzene, phenol, and aldehydes.
These chemical exhaust pollutants have a serious impact on air quality and the environment, and need to be properly treated.
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