Processing method of wastewater produced during process of using glycerol as raw material to produce epichlorohydrin and device thereof

Abstract

The invention relates to a processing method of wastewater produced during a process of using glycerol as raw material to produce epichlorohydrin and a device thereof. According to differences of sodium chloride, water and glycerol molecular diameters, absorption material similar with the glycerol molecular diameter is adopted by the invention for absorbing glycerol; therefore, an absorption device can be reused, the wastewater containing sodium chloride can be used as chlorine alkali industrialized saline, and cleaning water containing the glycerol with low concentration can be discharged safely after being processed by a biological method. The wastewater processing device comprises a sewage treatment pool, a raw water pool, a brine pool and a cleaning water pool. Connecting pipelines are arranged between the raw water pool and the brine pool and between the cleaning water pool and the sewage treatment pool. The pipeline is provided with a constant flow pump, a control valve, an absorption column, a control system and a total organic carbon detection instrument. The control system controls the circulation absorption and the recoil of the absorption column. The processing method has the positive effects of reasonable processing method, simple step, systematic control, less equipment investment, low energy consumption and small occupied area and effectively solves the problem of processing organic wastewater produced during the production process of using the glycerol as the raw material to produce the epichlorohydrin.

Description

【Technical Field】 [0001] The invention relates to the technical field of chemical industry and sewage treatment by chemical methods, and specifically relates to a treatment method and a treatment device for wastewater produced by using glycerin as a raw material to produce epichlorohydrin. 【Background technique】 [0002] Energy is a material that modern society cannot do without. In view of the rise and volatility of oil prices, as well as the huge consumption of oil resources, people are also actively exploring other energy sources while applying oil. Biodiesel is one of them. Now, many countries in the world are vigorously developing biodiesel. [0003] In the production process of biodiesel, a large amount of by-product glycerin is produced, which in turn causes an excess of glycerin and causes the price of glycerin to plummet. In this case, people have developed a new process to produce epichlorohydrin using glycerin as a raw material. However, this process will produce a hig...

AI Technical Summary

Problems solved by technology

However, the disadvantages of this method are: complex process, high energy consumption, and expensive treatment

However, its main disadvantage is that it cannot handle wastewater with a salinity exceeding 30g / L

However, this method is not suitable for treating wastewater with a large daily output, and has low treatment capacity and high energy consumption

[0008] Evaporation method can also be used for the treatment of high-salt wastewater, and salt solids can often be obtained, but its energy consumption is large and the cost is too high

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