ABS (Acrylonitrile Butadiene Styrene) resin production wastewater pretreatment method
An ABS resin and waste water production technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as hazards, waste water discharge not up to standard, blocked pipelines, etc., and achieve effective results Obvious, reduce operating costs, reduce the effect of usage
Inactive Publication Date: 2015-04-01
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology
However, the treatment effect is not good, and the removal rate of SS is only about 60%. The unremoved colloidal organic matter in the ABS resin production wastewater will bring harm to the downstream wastewater treatment, block the pipeline, bind microorganisms, affect the biochemical treatment effect, and cause The final discharge of wastewater does not meet the standard
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[0035] Table 1, Table 2 and Table 3 are the wastewater quality of an ABS resin production workshop at different times.
[0036] Table 1: Wastewater quality in areas B, C, and E
[0037]
[0038] Table 2: Wastewater quality in areas B, C, and E
[0039]
[0040] Table 3: Wastewater quality in areas B, C, and E
[0041]
[0042] The wastewater in zone C enters the regulating tank, and the pH value of the wastewater is adjusted to 5.0; the effluent of the regulating tank and the demulsifier are mixed and broken through the pipeline and then enter the coagulation tank, and the coagulant is added to carry out the coagulation reaction. The coagulant is cationic polyacrylamide, and the amount of aluminum salt compounded agent and polyacrylamide added per ton of wastewater (calculated by dry weight) is 0.15kg and 0.01kg respectively; The contact filtration and separation of the gas three-phase copolymerization bubble layer, the air flotation residence time is 19min, the ref...
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Abstract
The invention discloses an ABS (Acrylonitrile Butadiene Styrene) resin production wastewater pretreatment method for respectively pretreating wastewater generated in a butadiene polymerization process, a graft polymerization process and a coagulating and drying process of ABS resin production through separate pretreatment systems of all the processes. The ABS resin production wastewater pretreatment method comprises the steps: firstly, delivering the wastewater to a coagulation basin, adding a coagulant to sufficiently react and flocculating to form alum floc; then, enabling the flocculated water to flow into a copolymerization air flotation tank, releasing gas-soluble water by a gas-soluble releaser in the copolymerization air flotation tank to generate small bubbles, enabling the small bubbles to be bonded with the alum floc to generate air flotation copolymerization reaction to form a solid-liquid-gas three-phase copolymer; and then, enabling the solid-liquid-gas three-phase copolymer to simultaneously enter a separation tank to finish solid-liquid separation of scum and water, wherein the scum is scraped from the surface of the water into a scum tank by using a scum scraper and is outwards transported after being dehydrated, and the water flows into a homogenization tank so as to be subjected to the next biochemical treatment. The method can be used for efficiently removing the suspended matters and part of refractory toxic organic pollutants in wastewater with different water qualities in three regions B, C and E so that conditions are provided for the subsequent stable biochemical treatment.
Description
technical field [0001] The invention relates to a resin production wastewater treatment technology, in particular to a pretreatment method for ABS resin production wastewater. Background technique [0002] At present, the production process of ABS resin is mainly the emulsion grafting-blending method, and its production wastewater mainly comes from three areas: butadiene polymerization section (B area), graft polymerization section (C area) and coagulation drying section (E area). ). Area B mainly produces polybutadiene latex. The wastewater produced is mainly polymer, and the water is latex-like. The particle size of suspended solids is mainly concentrated between 0.3 and 10 μm. The water quality changes greatly, and the effluent suspended solids (SS) It is 60~1200mg / L, COD is 1000~20000mg / L; C area is the emulsion polymerization reaction of polybutadiene latex and styrene and acrylonitrile monomer, the effluent is milky white, and the particle size of suspended solids is ...
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IPC IPC(8): C02F9/14C02F9/04
Inventor 何绪文王春荣李焱王建兵张春晖于妍候嫔
Owner CHINA UNIV OF MINING & TECH (BEIJING)