Processing method of wastewater in the sebacic acid production and special extractor thereof

Abstract

The present invention relates to a wastewater treatment method of decanedioic acid production and special extraction plant. The method includes solid and liquor separation in a sedimentation pond, neutralization process pH value regulating, extracting agent extracting forbidden discharge matters and separation between the forbidden discharge matters and discharge water. The key scheme of the method is that a ricinoleic acid is adopted as the extracting agent to extract and separate the forbidden discharge matter hydroxybenzene in the wastewater of decanedioic acid production and the detail step of combined and repeat application of the extracting agent and the extractive matters is adopted. A matched special extraction plant is applied to carry through the operation of multilevel extracting forbidden discharge matters to realize the closed recycling of the forbidden discharge matters in a production system. The extraction plant consists of an extraction separation chamber, a compound emulsification pump arranged between two neighboring or interphase extraction separation chambers and a pipeline connected between the compound emulsification pump and the extraction separation chambers at two sizes that are arranged in order. An oil inlet of each matched compound emulsification pump is communicated with a fat phase exit of the back level extraction separation chamber. An inlet is communicated with a water phase exit of the front level extraction separation chamber. An exit of the compound emulsification is communicated with a fluid infusion opening extracted from a flow regulation chamber of the front level extraction separation chamber.

Description

Technical field [0001] The invention relates to a sewage treatment method and related special equipment. Specifically, it is the treatment method of sebacic acid production wastewater and its special extraction device. Background technique [0002] As an important organic chemical raw material, sebacic acid is widely used in high molecular polymer products, and the demand is huge. A sebacic acid production plant with a certain scale has an output of more than 10,000 to 20,000 tons per year. During the production process, the production waste water which is more difficult to treat will be produced at a weight ratio of 25 times. The wastewater containing 3000PPM of phenol is a substance that is banned by the state. The COD is 14000PPM, and it also contains 6% sodium sulfate. It belongs to high-salt wastewater and will cause serious pollution to the environment without treatment. At present, the treatment of sebacic acid production wastewater generally adopts resin activated carbon ...

AI Technical Summary

Problems solved by technology

The waste water contains 3000PPM of phenol, which is prohibited by the state to be discharged. The COD is 14000PPM, and it also contains 6% left and right sodium sulfate. It belongs to high-salt waste water, and it will cause serious pollution to the environment

At present, sebacic acid production wastewater is generally treated with resin activated carbon adsorption. Although this method can separate most of the forbidden phenols, the use cycle of the resin is too short, and the backwashing workload is too large, so it is not suitable for industrial Production

Moreover, the resin consumption is too large, which is unacceptable to general enterprises

There is still no ideal separation scheme for the high-concentration sodium sulfate contained in wastewater

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