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Chemical synthesis pharmaceutical wastewater solvent recovery method and device

A technology of pharmaceutical wastewater and recycling methods, which is applied in the field of water treatment and can solve problems such as waste of resources

Inactive Publication Date: 2021-01-15
CHONGQING TECH & BUSINESS UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned treatment process can neutralize and degrade the wastewater, solvents such as methanol, ethanol, acetone, isopropanol, ethyl acetate, and dimethyl sulfoxide in the wastewater cannot be recycled and reused well. Certain waste of resources

Method used

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  • Chemical synthesis pharmaceutical wastewater solvent recovery method and device
  • Chemical synthesis pharmaceutical wastewater solvent recovery method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment is basically as attached figure 1 Shown: A chemical synthesis pharmaceutical solvent recovery wastewater treatment device, including a concentration unit, a rectification unit and a membrane separation unit.

[0034] The concentration unit includes a three-effect evaporator 1 and a degassing tower 2, and the three-effect evaporator 1 and the degassing tower 2 are connected by pipelines.

[0035] The rectification unit comprises mother liquor storage tank 3, preheater 4, falling film tower still 5 and rectification tower 6, also communicates with between mother liquor storage tank 3, preheater 4, falling film tower still 5 and rectification tower 6 Pipelines, and pipelines are also connected between the mother liquor storage tank 3 and the degassing tower 2; the top of the falling film tower reactor 5 in this embodiment is provided with a steam port, and the bottom end is provided with a hot water port, and the rectifying tower 6 is a multi-stage structur...

Embodiment 2

[0043] Such as figure 2As shown, the difference between this embodiment and the first embodiment is that in this embodiment, the hot water port is connected with a hot water tank 18 and a water circulation vacuum pump 19 . In this embodiment, the steam in the falling film tower kettle 5 will be condensed into liquid (hot water) after heat exchange, and will be discharged along the hot water outlet. The temporary heating of this part of hot water can be realized by the hot water tank 18 and the water circulation vacuum pump 19. storage and later recycling.

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Abstract

The invention relates to the technical field of water treatment, and discloses a chemical synthesis pharmaceutical wastewater solvent recovery method and device. The chemical synthesis pharmaceuticalwastewater solvent recovery method comprises the steps of I, concentrating solvent-containing pharmaceutical wastewater, specifically, evaporating the solvent-containing pharmaceutical wastewater by an evaporator, and introducing the solvent-containing pharmaceutical wastewater into a degassing tower for degassing separation to obtain a solvent primary concentrated solution; II, rectifying and classifying the solvent-containing pharmaceutical wastewater, specifically, rectifying and classifying the primary concentrated solution by using a rectifying unit, wherein the water content of the solvent after rectifying and classifying is less than 12wt%; and III, dehydrating the solvent-containing pharmaceutical wastewater, specifically, dehydrating the solvent-containing pharmaceutical wastewater by adopting a membrane separation unit, wherein the purity of the dehydrated solvent is greater than 98%. According to the invention, recovery and purification of the solvent in the chemical synthesis pharmaceutical wastewater can be realized.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a solvent recovery method and device for chemically synthesized pharmaceutical wastewater. Background technique [0002] Chemical synthesis pharmaceutical wastewater is a kind of wastewater with complex components and strong biological toxicity. It contains methanol, ethanol, acetone, isopropanol, ethyl acetate, dimethyl sulfoxide and other components, and has high COD, high salt, and high ammonia nitrogen. Features. Due to the above-mentioned characteristics of chemical and pharmaceutical wastewater, it is difficult for microorganisms to grow, which brings great difficulties to the biochemical treatment methods used in traditional wastewater treatment. [0003] The current water treatment method used for chemical and pharmaceutical wastewater is usually: use the aeration device to aerate the wastewater to settle in the sedimentation tank, then use the Fenton reactor and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/34
CPCC02F9/00C02F2103/343C02F1/20C02F1/04C02F1/048C02F2209/10C02F1/281
Inventor 申渝齐高相陈猷鹏晏鹏庞家胜刘曦薇洪国强徐开仕白智全
Owner CHONGQING TECH & BUSINESS UNIV
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