Method for treating unsaturated polyester resin production wastewater
A polyester resin and wastewater production technology, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, heating water/sewage treatment, etc., to save treatment costs and reaction time.
Inactive Publication Date: 2012-07-04
EAST CHINA UNIV OF SCI & TECH +1
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to overcome the shortcomings of the existing incineration method and general biochemical method for the treatment of unsaturated polyester resin production wastewater, to provide a comprehensive utilization treatment method for unsaturated polyester resin production wastewater, from unsaturated polyester resin production wastewater Recycle some raw materials, and at the same time treat the production wastewater into industrial circulating cooling water
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] Depend on figure 1 As can be seen, a kind of unsaturated polyester resin production wastewater treatment method of the present invention, comprises oil-water separation, is characterized in that: comprises the following steps successively:
[0019] 1) Twice distillation: the aqueous solution after oil-water separation and removal of slick oil is placed in a distillation pot for two distillations. The temperature of the first distillation is 60°C, the temperature of the second distillation is 90°C, and the residual liquid of the second distillation is unsaturated Reuse in polyester resin production process;
[0020] 2) The second distillate is pretreated in four steps of water collection tank-neutralization tank-flocculation sedimentation tank-adjustment tank to remove high molecular weight polymers to facilitate subsequent biochemical treatment;
[0021] In the neutralization tank, sodium hydroxide is used to adjust the pH of the second distillate to 6-9;
[0022] The...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of industrial wastewater treatment, and relates to a method for treating unsaturated polyester resin production wastewater. The method is characterized in that: wastewater and dibasic alcohol acid in aqueous solution from which floating oil is removed through oil-water separation are basically separated by two-time distillation technology, and second-time distillation residual liquid is recycled in the unsaturated polyester resin production process; and second-time distillate is subjected to pretreatment in a water collecting tank, a neutralizationtank, a flocculation precipitation tank and an adjusting tank, is subjected to biochemical treatment in a facultative tank and a contact oxidation tank, is subjected to vertical flow sedimentation, sand filtration and activated carbon adsorption physical treatment, and is treated by an ultrafiltration membrane and reverse osmosis membrane system, so that circulating cooling water for production is prepared. The unsaturated polyester resin production wastewater is distilled to recover raw materials, and is prepared into the circulating cooling water for unsaturated polyester resin production simultaneously, so the method has the characteristics of comprehensively utilizing waste, reducing emission, saving energy, wastewater treatment cost and reaction time, meeting the requirement of environmental protection, and the like, and is suitable for industrial production.
Description
technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and relates to a method for treating unsaturated polyester resin production wastewater, in particular to a method for treating unsaturated polyester resin production wastewater into industrial circulating water and recovering part of raw materials. Background technique [0002] Unsaturated polyester resin is an important chemical product with a wide range of applications. In recent years, as the environmental protection department pays more and more attention to environmental protection, the comprehensive utilization and treatment of unsaturated polyester resin production wastewater is becoming more and more important. [0003] Commonly used raw materials for the production of unsaturated polyester resins are ethylene glycol, propylene glycol, diethylene glycol, phthalic acid, and maleic acid. The chemical reaction in the production of unsaturated polyester is a polyconde...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/04
Inventor 寇正福李新军李敬王伟徐建刚刘坐镇
Owner EAST CHINA UNIV OF SCI & TECH