Method for processing wastewater from production of epoxy chloropropane by using glycerol as material
A technology of epichlorohydrin and treatment method, which is applied in natural water treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of not realizing the maximum resource utilization of pollutants and affecting the application of technology, etc. To achieve the effect of easy operation and control, obvious economic benefits, and simple installation
Inactive Publication Date: 2012-09-26
西安汉术化学工程股份有限公司
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Since the adsorption equilibrium determines the limit of the adsorption process, there is no industrial report on the adsorption of low concentration, small molecular weight, high boiling point, and trace amounts of water-soluble organic matter in China.
In addition, the cleaning water containing low concentration of glycerin in this technology needs to be discharged through biological treatment, which does not realize the maximum possible resource utilization of pollutants
[0010] As can be seen from the prior art described above, there are many defects in the prior art, which seriously affect the application of these technologies. Therefore, it is also very necessary to develop a low-efficiency treatment for epichlorohydrin and propylene oxide saponification of high-salinity organic wastewater at present. Cost, method of recycling pollutants
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[0023] The amount of high-salinity organic wastewater produced by the ECH saponification and cyclization process in a factory is 15t / h. The wastewater composition is: NaCL 20% (weight ratio), NaOH 0.7% (weight ratio), glycerin 4500ppm, chlorine-containing organic matter 50ppm, COD 5500mg / L.
[0024] 15t / h high-salinity organic wastewater is sent to the preheater (E101) after being clarified and filtered to exchange heat with the condensed water from the IV-effect balance barrel (V104). After being heated to 40°C, it enters the IV-effect evaporation tank (EV104 ), under the condition of 0.04Mpa, it is heated to 75°C by circulation, and 3.526t / h of waste water vapor is generated, which is sucked into the mixing condenser (V102) by the vacuum pump (P108), and recovered to the water-sealed pool (V103) after condensation;
[0025] The concentrated liquid in the IV effect evaporator (EV104) is sent to the III effect evaporator (EV103) by the IV effect transfer pump (P105), and is he...
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The invention relates to a method for processing high-salinity organic wastewater generated in a saponification cyclization procedure in a process of producing epoxy chloropropane by using glycerol as material. The processing method comprises the following steps: firstly carrying out four-effect evaporation on the high-salinity organic wastewater to obtain concentrated salt slurry; then dewatering and centrifugally separating the concentrated salt slurry to obtain sodium chloride solid; conveying mother liquor with high glycerin content to a glycerin refining unit to be used as the material, condensing and recovering wastewater vapor. The method and a device for processing wastewater disclosed by the invention are simple, easy to operate and control, high in efficiency and obvious in economic benefit, not only can effectively process industrial wastewater to be up to the national emission standard, but also can effectively recover sodium chloride in the wastewater, and create a new profit growth point for an enterprise.
Description
technical field [0001] The invention belongs to the technical field of high-salt organic wastewater treatment. More specifically, the present invention relates to a method for the treatment of high-salinity organic wastewater produced in the saponification process in the process of producing epichlorohydrin with glycerin as raw material, which includes recovering sodium chloride by-products and Glycerin is recovered to realize the recycling of pollutants. Background technique [0002] Epichlorohydrin, also known as epichlorohydrin, is an important organic chemical raw material, mainly used in the production of epoxy resin, glass fiber reinforced plastics, electrical insulation materials, surfactants, medicines, pesticides, coatings, ion exchange resins, plasticizers, chlorine Alcohol rubber. [0003] At present, there are two production processes for epichlorohydrin and its precursor dichloropropanol, high-temperature chlorination of propylene and propylene acetate method....
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IPC IPC(8): C02F1/04C01D3/06C07C31/22C07C29/78C02F103/36
Inventor 邓绍贵何世强刘艳马飞王志琰狄萌
Owner 西安汉术化学工程股份有限公司
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