Treatment method for phenolic ammonia wastewater produced by coal pyrolysis
A wastewater treatment and coal pyrolysis technology, which is applied in biological water/sewage treatment, heating water/sewage treatment, degassed water/sewage treatment, etc., can solve the problem of high cost of extraction and dephenolization, achieve cost reduction, increase biochemical sexual effect
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[0024] Example one
[0025] See figure 1 , Phenol-ammonia wastewater produced by coal pyrolysis overflows from the ammonia tank to the remaining ammonia tank. A cooling device is installed in the remaining ammonia tank to cool the remaining ammonia water through internal cooling. The temperature of the remaining ammonia water drops from about 80°C to below 40°C The solubility of phenolic substances in water has decreased significantly, and the solubility of some heavy and light oils in phenol-ammonia wastewater has decreased. Among them, most of them are phenol oils. These oils are separated from phenol-ammonia wastewater and separated by gravity. The oil is separated to complete the primary pretreatment of phenol-ammonia wastewater; the phenol-ammonia wastewater pretreated by cooling and degreasing is passed through the air flotation pretreatment equipment to make small oil beads float up under the influence of air bubbles, gather on the liquid surface, and act on gravity. Part ...
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[0026] Example two
[0027] See figure 2 , Phenol-ammonia wastewater overflows from the ammonia tank to the remaining ammonia tank. The remaining ammonia tank is set to be appropriately larger. The outside of the tank is equipped with radiating fins to cool the remaining ammonia through the external heat. The temperature of the ammonia is reduced from about 80 to below 50. The solubility of phenolic substances in water has decreased significantly, and the solubility of some heavy and light oils in phenol-ammonia wastewater has decreased. Among them, most of them are phenol oils. These oils are separated from phenol-ammonia wastewater and separated by gravity. The oil is separated to complete the primary pretreatment of phenol-ammonia wastewater; the phenol-ammonia wastewater pretreated by cooling and degreasing is passed through a hydrophilic and oil-repellent filter device. Small oil beads aggregate on the surface of the filter element and are blocked outside the filter element...
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