Phenol-ammonia wastewater treatment device and process for degassing and grading treatment of light oil and heavy oil

Abstract

The invention provides a phenol-ammonia wastewater treatment device and process for degassing and light and heavy oil staged treatment, the device comprises an oil-gas-water three-phase separator, a combined medium coalescer and a combined fiber coalescer, the oil-gas-water three-phase separator is internally provided with a rotational flow core tube module, a sedimentation module, a light oil collection module and a flow baffle in sequence; a liquid distributor, a liquid rectifier and an anisotropic medium coalescence filtering module are sequentially arranged in the combined medium coalescer from top to bottom; an inlet distributor, a primary enhanced coalescence module, an enhanced sedimentation module and a secondary enhanced coalescence module are sequentially arranged in the combined fiber coalescer. The degassing efficiency of the phenol-ammonia wastewater treated by the process is greater than 99%, the oil content in a water phase is lower than 200mg / L, the particle suspended matter content is lower than 40mg / L, the suspended solids with the particle size of more than 50mu m can be completely removed, and the device is small in occupied area and high in treatment precision, and can be widely applied to oil removal and clarification of oil / turbidity-containing production wastewater in industries such as petrochemical industry and coal chemical industry.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment in coal chemical industry and environmental protection, and in particular relates to a phenol ammonia wastewater treatment device and process for degassing and graded treatment of light and heavy oil. Background technique [0002] In the process of coal chemical production, a large amount of wastewater is usually produced, which is characterized by a large amount of water and complex water quality. According to the existing process, converting 1 ton of coal usually produces 0.8-1.1 ton of phenol ammonia wastewater. These wastewaters often contain a large amount of toxic and refractory phenolic compounds, oil, ammonia nitrogen and a large number of suspended particles. Since the oil contained in wastewater has great reuse value, and the existence of suspended particles will affect the advanced treatment of downstream phenolic ammonia wastewater, it is necessary to recover the emulsifi...

AI Technical Summary

Problems solved by technology

The current conventional treatment methods for emulsified oil droplets and suspended particles in phenolic ammonia wastewater include chemical precipitation, biological flocculation, membrane filtration, etc., but these methods generally have problems such as high process and equipment costs, low efficiency, complicated operation, and difficult follow-up treatment.

[0003] Invention application CN110540329A discloses a method and system for treating phenolic ammonia wastewater, in which a traditional oil skimming tank is used to remove the oil phase and solid phase, and the gravity sedimentation method is used to carry out the sedimentation treatment, but the treatment time of this treatment method is long. and requires a larger processing space

The utility model CN204891292U discloses a light and heavy oil separator in phenol water, which mainly adopts natural sedimentation and heating and evaporation to realize the concentration of phenol water and the separation of light and heavy oil. The separation effect is not obvious and other defects

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