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Treatment system of epoxypropane industrial waste water

A technology for propylene oxide and industrial wastewater, applied in organic chemistry, ether preparation, separation/purification of hydroxyl compounds, etc., can solve the problems of high recycling cost and low recycling efficiency, and achieve the effect of high recycling cost and high purity

Pending Publication Date: 2018-06-29
鲍志兴
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Problems solved by technology

[0005] The invention provides a propylene oxide industrial wastewater treatment system, which aims to overcome the problems of high recovery cost and low recovery efficiency in traditional methods

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  • Treatment system of epoxypropane industrial waste water

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Embodiment Construction

[0012] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0013] Pervaporation (PV) is a new type of membrane separation technology developed in recent years. It is driven by the partial pressure difference of the component vapor in the liquid mixture and relies on the different properties of the dissolution and diffusion rates of each component in the membrane. A new membrane separation technology process for mixture separation. Its outstanding advantage is that it can achieve separation tasks that are difficult to complete by traditional methods such as distillation, extraction, and absorption with low energy consumption.

[0014] refer to figure 1 ,Propylene oxide industrial wastewater treatment system, including heat exchanger 1, filtration system 2, pervaporation system 3, condenser 4, vacuum pump 5, liquid storage tank 6, methanol tower 7, main tower 8 and dealcoholization tower 9, all The heat exchange...

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Abstract

The invention discloses a treatment system of epoxypropane industrial waste water. The treatment system comprises a heat exchanger, a filter system, a pervaporation system, a condenser, a vacuum pump,a liquid storage tank, a methanol tower, a main tower, and a dealcoholization tower; the concentration of propylene glycol monomethyl ether can be increased to 25 to 30% after passing through a pervaporation workshop section, and methanol concentration is 2% or higher; the material with increased concentration is introduced into a three column rectification system (the methanol tower, the main tower, and the dealcoholization tower) for separation and recycling. The treatment system is capable of solving problems in the prior art that methanol and propylene glycol monomethyl ether recovery cost is high and efficiency is low, and the purities of the recycled methanol and propylene glycol monomethyl ether are extremely high.

Description

technical field [0001] The invention relates to a waste water treatment system, in particular to a treatment system for production waste water formed in the process of producing propylene oxide through the epoxidation of hydrogen peroxide and propylene. Background technique [0002] During the epoxidation of propylene oxide to produce propylene oxide, the side reactions produce propylene glycol and propylene glycol methyl ether. The wastewater produced by this process mainly contains organic substances such as propylene glycol methyl ether, methanol, and propylene glycol. The composition and ratio are shown in the table below. [0003] project name content unit Methanol 0.55 ％ Propylene Glycol 0.063 ％ Propylene Glycol Methyl Ether 4.66 ％ water 94.7 ％ Solid particles <20 mg / L Salts (sodium sulfate) <200 mg / L total nitrogen >50 mg / L [0004] If it is dis...

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Application Information

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IPC IPC(8): C07C29/76C07C31/04C07C41/36C07C43/13
CPCC07C29/76C07C41/36C07C31/04C07C43/13
Inventor 鲍志兴鲍尘琨
Owner 鲍志兴