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Oily Inner Mongolia Wastewater Treatment Process: With the Rapid Promotion of China's Market Economy

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Oily Inner Mongolia Wastewater Treatment Process: With the Rapid Promotion of China's Market Economy

作者: Release Date: 2019-08-20 Author: Click:

Oily Inner Mongolia wastewater treatment process: With the rapid improvement of China's market economy, all walks of life have achieved very rapid development, and the living standards and quality of life of urban residents have also improved significantly. At the same time, The environment has also suffered severe damage, and various sources of pollution are constantly eroding our ecological environment. Among them, water pollution is a complex subject with many pollution sources. In the treatment of water pollution in China, the treatment of oily sewage is a very difficult task. We should fully analyze the source of oily sewage and analyze its hazards. , Clarify the work process of oily wastewater treatment, so as to work out scientific and reasonable countermeasures. In this paper, the sources and hazards of oily wastewater, the process of oily wastewater treatment, and the key technical methods of oily wastewater treatment are analyzed and analyzed in detail in order to discuss the oily wastewater treatment in China in detail.

Oily substances contained in oily wastewater include natural petroleum, petroleum products, tars and their fractions, as well as edible animal and vegetable oils and fats. In terms of pollution to water bodies, mainly oil and tar. Due to the large differences in oil concentration in wastewater discharged from different industrial sectors, such as wastewater generated during the refining process, the oil content is about 150 to 1000 mg / L, the tar content in coking wastewater is about 500 to 800 mg / L, and the gas generation station discharges wastewater into the wastewater. The tar content can reach 2000-3000mg / L. Therefore, the treatment of oily wastewater should first use an oil trap to recover oil slicks or heavy oil. The treatment efficiency is 60% to 80%, and the oil content in the effluent is about 100 to 200mg / L. It is difficult to emulsify and disperse oil in wastewater. Treatment, it should prevent or reduce the emulsification phenomenon. One of the methods is to reduce the emulsification of oil in the wastewater during the production process; the other is to reduce the number of times that the pump is used to raise the wastewater during the treatment process to avoid increasing the degree of emulsification. Treatment methods usually use air flotation and demulsification.

If oily wastewater is not recycled, it will cause waste; discharge into rivers, lakes or bays will pollute water bodies and affect the survival of aquatic organisms; used in agricultural irrigation, it will block soil voids and hinder crop growth.

The treatment of oily wastewater should first consider the recovery of oily substances and make full use of the treated water resources. Therefore, the treatment of oily wastewater can first use an oil trap to recover oil slick or heavy oil. The oil trap of Inner Mongolia wastewater treatment is suitable for separating large particles of oil in wastewater. The treatment efficiency is 60 to 80%, and the oil content in the effluent is about 100 to 200 mg / liter. Fine oil droplets and emulsified oil in wastewater are difficult to remove.

Oily substances usually exist in three states in wastewater.

(1) Floating oil, the particle diameter of the oil droplets is larger than 15 μm, and it is easy to separate from the wastewater. Oil products have larger particles dispersed in wastewater, and the particle size is greater than 100 microns, which is easy to separate from wastewater. In petroleum sewage, this oil accounts for 60 to 80% of the total oil content in water.

(2) Disperse oil. The diameter of the oil droplets is greater than 1 μm, and it is suspended in water.

(3) Emulsified oil, the particle size of the oil droplets is less than 1 μm, the particle size of the oil dispersed in the waste water is small, it is in an emulsified state, and it is not easy to separate from the waste water.

(4) A state in which oil is dissolved, and oils are dissolved in water.

Oily substances contained in oily wastewater include natural petroleum, petroleum products, tars and their fractions, as well as edible animal and vegetable oils and fats. In terms of pollution to water bodies, mainly oil and tar. Due to the large differences in oil concentration in wastewater discharged from different industrial sectors, such as wastewater generated during the refining process, the oil content is about 150 to 1000 mg / L, the tar content in coking wastewater is about 500 to 800 mg / L, and the gas generation station discharges wastewater into the wastewater. The tar content can reach 2000-3000mg / L. Therefore, the treatment of oily wastewater should first use an oil trap to recover oil slicks or heavy oil. The treatment efficiency is 60% to 80%, and the oil content in the effluent is about 100 to 200mg / L. It is difficult to emulsify and disperse oil in wastewater. Treatment, it should prevent or reduce the emulsification phenomenon. One of the methods is to reduce the emulsification of oil in the wastewater during the production process; the other is to reduce the number of times that the pump is used to raise the wastewater during the treatment process to avoid increasing the degree of emulsification. Treatment methods usually use air flotation and demulsification.

If oily wastewater is not recycled, it will cause waste; discharge into rivers, lakes or bays will pollute water bodies and affect the survival of aquatic organisms; used in agricultural irrigation, it will block soil voids and hinder crop growth.

The treatment of oily wastewater should first consider the recovery of oily substances and make full use of the treated water resources. Therefore, the treatment of oily wastewater can first use an oil trap to recover oil slick or heavy oil. The oil trap is suitable for separating oil with large particles in wastewater. The treatment efficiency is 60 to 80%, and the oil content in the effluent is about 100 to 200 mg / liter. Fine oil droplets and emulsified oil in wastewater are difficult to remove.

1 Sources and hazards of oily wastewater

1.1 Source analysis of oily wastewater: The sources of oily wastewater in China are very extensive. Inner Mongolia wastewater treatment will produce oily wastewater in the process of steel refining, industrial production, petroleum extraction, and pesticide and food processing and production. Oil pollutants mainly exist in four forms, namely dissolved oil, dispersed oil, slick oil and emulsified oil.

(1) Petrochemical industry. In China's petrochemical industry, from the initial mining to the final transportation and consumption, oily wastewater will be produced at almost any stage. Under the rapid development of China's science and technology level, China's tertiary oil recovery technology has also been widely used. It improves the effect of oil displacement, but also makes the composition of sewage more complicated.

(2) Chemical and pharmaceutical engineering. Its main source is oily sewage with high concentration process. During the manufacturing process, a large amount of water and lubricant are used in the stages of raw material reaction, product separation and raw material pretreatment, so a large amount of oily sewage will be generated in the later stage.

(3) Metal smelting industry. In the process of smelting metals, whether it is materials that come in contact with oil or equipment that comes in contact with oil, we need to cool, clean, and lubricate it, and the lubricant may also come in direct contact with it, so oily sewage will be formed .

(4) Food processing and production. In the process of food processing and production in our country, oily sewage must be produced during equipment cleaning and machine lubrication.

1.2 Hazard analysis of oily sewage

(1) Oily sewage pollutes drinking water sources. If our daily drinking water sources are contaminated by oily sewage, not only humans and animals will be infected, but also food poisoning, which is very harmful; in addition, oily sewage also contains a certain amount of carcinogens in oil, so it is possible Will increase the incidence of cancer in areas contaminated by oily sewage;

(2) Oily sewage is discharged into rivers and lakes. The density of oily sewage is smaller than that of normal pure water, so once the oily sewage is discharged into rivers and lakes, it will adhere to the water surface, and the atmosphere and water gas cannot be exchanged normally, and the oxygen content in the water Continuous decline, then the aquatic plants cannot grow normally, the quality of the water body is seriously affected, and the value of water resources is greatly reduced;

(3) Oily sewage enters the soil. If oily sewage is used as irrigation water for irrigation of the soil, oil stains will be deposited on the surface of the crops. Inner Mongolia wastewater treatment soil cannot effectively exchange with the outside air, and the soil's metabolic rate will slow down, which will affect normal growth as a It can also lead to the death of crops. If oily crops are consumed by humans, it will also harm our health.

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URL of this article: http://onasetfilm.com/news/467.html

Keywords: Inner Mongolia wastewater treatment plant , Inner Mongolia wastewater treatment equipment , Inner Mongolia wastewater treatment plant

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