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Centrifugal extraction machine processing fine chemical washing in industrial waste water containing phenol

by:Deyuan      2020-08-25
The basic characteristics of the fine chemical industry wastewater is: ( 1) Water composition is complicated, by-products, reaction solvent is often raw materials is a class or ring structure of the compound, increasing the difficulty of wastewater treatment. ( 2) High levels of pollutants in wastewater, which is due to incomplete and raw material used in the production of raw materials, or caused by a large number of solvent medium into the wastewater system; ( 3) Poisonous and harmful material, fine chemical industry have a lot of organic pollutants in wastewater is poisonous and harmful to microorganisms, such as halogen compounds, nitro compounds, have antiseptic effect of dispersant or surfactant, etc. ; ( 4) The refractory materials, B/C ratio is low, but biological sex difference; ( 5) Waste water high chroma.
   ( 1) The commonly used physical method including filtration, inclined tube sedimentation method ( Link to the product) The gas float ( Link to the product) And so on. Filtering method based on granular aggregates with hole intercept impurities in water, mainly is to reduce the suspended solids in the water, in chemical waste water filtering processing, commonly used pull box filter and microbe filter, microporous tube made from polyethylene, aperture size can be adjusted, switch more convenient; Inclined tube sedimentation method was used to the water of suspended particles sedimentation performance, under the action of gravity field, natural sedimentation, in order to achieve a kind of solid-liquid separation process; Air flotation is through the adsorption of tiny air bubbles generated in carry aerosols and brought to the surface method. The three methods of physical process simple and easy to manage, but may not apply to remove waste water soluble ingredients, has great limitations
( 2) Chemical method is to use the effect of chemical reaction to remove organic matter, inorganic impurities of the water. There are mainly chemical coagulation method ( Link to the reaction tank) , chemical oxidation, catalytic oxidation of inclined tube sedimentation ( Link to the product HOP) ( Link to the case) And so on. Chemical coagulation method ( Link to the product dosing) Function objects are mainly small suspended solids in water and colloidal material, through adding the chemical coagulation and flocculation, precipitation and remove the colloid stability off formation. Coagulation method can not only remove the diameter of 10 - in the wastewater 3 ~ 10 - 6 mm of tiny suspended particles, but also can remove chromaticity, microorganism and organic matter, etc.
   ( 3) Biological method ( Link to the products and biochemical) ( Link to the case) Is the use of microbial metabolism process of transformation of organic matter degradation. With the development of chemical industry, pollutant composition is increasingly complex, the wastewater contains large amounts of organic pollutants, such as only by physical or chemical method is difficult to meet the requirements of governance. Use of microbial metabolism, to transform the organic pollutants in wastewater and stability, to make it harmless.
   ( 4) Used in the physical chemistry of chemical wastewater treatment method are: the ion exchange method, extraction, membrane separation, Link to the product of CMF) ( Link to the case) And so on. Often contain some tiny suspended solids in waste water by the static and dissolved organic matter, in order to further remove residual of the pollutants in the water, physical and chemical methods can be used for processing. Ion exchange method is a kind of by means of ion exchanger on ion and water ion exchange reaction and remove harmful ion state material, the method of waste water in water softening, has been widely used in organic wastewater treatment. Extraction method USES not miscibility with water but can dissolve contaminants extraction agent, make contact with the waste water to mix adequately, the use of pollutant solubility in the water and solvent or distribution ratio is different, reach the purpose of separation and extraction of pollutants and purifying wastewater. Filter membrane was conducted using semipermeable membrane molecules, and a method to deal with waste water, so also known as membrane separation technology. This method is to use 'semipermeable membrane' the nature of the separation effect. This can make the water through the membrane, but cannot make suspended solids in water and solutes through, so this kind of film is called a semi-permeable membrane, it can be used to remove the dissolved solids in the water, most of the soluble organic matter and colloidal substances. In recent years began to have a lot of attention to this method, the application scope is expanding. These methods are only suitable for the separation of the one kind of substance, strong selectivity, and high cost, easy to cause secondary pollution.
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