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

Abstract

The invention relates to a treatment method for sebacic acid production wastewater and a special extraction device thereof. The method includes solid and liquid separation in settling tanks, neutralization method Ph value adjustment, extractant extraction of forbidden substances, and separation of forbidden substances and discharge water. The key idea is to use ricinoleic acid as the extraction agent to extract and Separation of prohibited discharge phenol in sebacic acid production wastewater, and the specific steps of mixing and reusing the extractant and extract were adopted. With the help of the supporting special extraction device, the multi-stage extraction operation of forbidden substances is carried out to realize the closed circulation of forbidden substances in the production system. The extraction device is composed of extraction and separation tanks arranged in sequence, a mixing emulsification pump arranged between two adjacent or interphase extraction and separation tanks, and a pipeline connected between the mixing emulsification pump and the extraction and separation tanks on both sides. The oil inlet of a matching mixed emulsification pump is connected with the oil phase outlet of the subsequent stage extraction and separation tank, the water inlet is connected with the water phase outlet of the front stage extraction and separation tank, and the outlet of the mixed emulsion is connected with the steady state of the previous stage extraction and separation tank. The rehydration port drawn from the flow chamber is connected.

Description

technical field [0001] The invention relates to a sewage treatment method and related special equipment. Specifically, it is a treatment method for sebacic acid production wastewater and a special extraction device thereof. 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. Sebacic acid production plants with a certain scale have an annual output of more than 10,000 to 20,000 tons. In the production process, production wastewater that is difficult to treat will be generated at a weight ratio of 25 times. 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% sodium sulfate. 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...

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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