CN204174014U - A kind for the treatment of unit of PVC mother liquor waste water treatment for reuse - Google Patents
A kind for the treatment of unit of PVC mother liquor waste water treatment for reuse Download PDFInfo
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- CN204174014U CN204174014U CN201420578778.6U CN201420578778U CN204174014U CN 204174014 U CN204174014 U CN 204174014U CN 201420578778 U CN201420578778 U CN 201420578778U CN 204174014 U CN204174014 U CN 204174014U
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Abstract
The utility model relates to a kind for the treatment of unit of PVC mother liquor waste water treatment for reuse, and treatment unit comprises: aeration tank, waste water lifting pump, settling tank, ceramic video disc membrane filtration system fresh feed pump, ceramic video disc membrane filter appts, ceramic video disc membrane filter appts produce water water pot, reverse osmosis filtration system charging high-pressure pump, reverse-osmosis filtering device and product water pot; The utility model, by the pre-treatment of PVC mother liquor waste water, is effectively removed part impurity particle, is regulated the water yield and the water quality of waste water simultaneously, reduces the water yield and the variation water quality of subsequent disposal, guarantees that subsequent disposal is stable and carries out.Pretreated water is through ceramic video disc membrane filtration, and effluent quality meets feed water by reverse osmosis requirement, and operating pressure is low, energy-conserving and environment-protective.Polymerization reaction kettle water water quality standard is met through reverse-osmosis treated product water.
Description
Technical field
The utility model belongs to energy-conserving and environment-protective technical field, is specifically related to a kind for the treatment of unit of PVC mother liquor waste water treatment for reuse.
Background technology
Polyvinyl chloride, English abbreviation PVC (Polyvinyl chloride polymer=PVC molecular structure) is the thermoplastic resin be polymerized under initiator effect by vinylchlorid.It is the homopolymer of vinylchlorid.A large amount of processing wastewater can be produced in the polymerization technique production process of polyvinyl chloride (PVC), wherein be mainly centrifuge mother liquor.The feature of PVC centrifugation mother liquor: 1. the water yield is larger.Often produce 1 ton of PVC and generally need 3 ~ 5 tons of deionized waters.2. the temperature of centrifuge mother liquor is generally at about 40 ~ 70 DEG C.3. centrifuge mother liquor concentration of suspension is 20 ~ 300mg/L.4. organic concentration is lower, difficult degradation, and COD is at 200 ~ 500mg/L.5. salts contg is low.Along with the exhaustion day by day of the more strict of national environmental protection policy and China's water resources, its exhaust emission and recycling problem more and more come into one's own, and also get more and more to the research of correlation technique.
At present, mainly by sewage after treatment, processing target is except the suspended substance in decontaminated water and COD to the PVC mother liquor waste water treatment for reuse technique of enterprise, reaches polymerization reaction kettle water water quality standard, realize water resources recycle, the economic benefit of enterprise, environmental benefit and social benefit are maximized.In recent years, the mode of PVC mother liquor waste water process many employings aeration, coagulation, precipitation processes, and this processing mode floor space is large, and the less stable for the treatment of effect, the water quality after process is more difficult reaches reuse standard.
Utility model content
For the problems referred to above, main purpose of the present utility model be to provide one first by pretreated for PVC mother liquor waste water water through ceramic video disc membrane filtration, effluent quality meets feed water by reverse osmosis requirement, operating pressure is low, energy-conserving and environment-protective, meet the treatment unit of the PVC mother liquor waste water treatment for reuse of polymerization reaction kettle water water quality standard through reverse-osmosis treated product water.
The utility model solves above-mentioned technical problem by following technical proposals: a kind for the treatment of unit of PVC mother liquor waste water treatment for reuse, and described treatment unit comprises: aeration tank, waste water lifting pump, settling tank, ceramic video disc membrane filtration system fresh feed pump, ceramic video disc membrane filter appts, ceramic video disc membrane filter appts produce water water pot, reverse osmosis filtration system charging high-pressure pump, reverse-osmosis filtering device and product water pot; Described aeration tank is connected by waste water lifting pump with settling tank, described settling tank is connected with ceramic video disc membrane filter appts, ceramic video disc membrane filtration system fresh feed pump is installed between settling tank and ceramic video disc membrane filter appts, pottery video disc membrane filter appts is connected with ceramic video disc membrane filter appts and produces water water pot, pottery video disc membrane filter appts produces water water pot and is connected on reverse-osmosis filtering device by reverse osmosis filtration system charging high-pressure pump, and reverse-osmosis filtering device also connects settling tank and product water pot by pipeline.
Positive progressive effect of the present utility model is: the utility model is by PVC mother liquor waste water after pre-treatment, ceramic video disc membrane filtration system and reverse osmosis filtration system, and effluent quality meets reuse water index, reaches the object of " water-saving and emission-reducing ".Sewage enters into ceramic video disc membrane filter appts after pretreatment, rotated by video disc and form relative cross-flow campaign with entered fluid, by system online backflushing, improve permeation flux, and regularly carry out matting, the product water of ceramic video disc membrane filtration system enters into reverse-osmosis filtering device, product water is used for reuse, reverse osmosis concentrated water, for the production of rushing still, whizzer flushing, regularly cleans reverse osmosis filtration system, increases the service life while warranty period permeation flux.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of the device that the utility model adopts.
Embodiment
The utility model preferred embodiment is provided, to describe the technical solution of the utility model in detail below in conjunction with accompanying drawing.
PVC mother solution produced primarily of the waste water of water and flush filter etc. that whizzer is separated, traditional materialization and biochemical processing method, the suspended substance in waste water and partial organic substances can be removed, but organic medicament removal efficiency of dissolving is low, water after process cannot be used for being polymerized workshop section, can only wash water be used for, be unfavorable for making full use of of water.The mode process PVC mother liquor waste water that the utility model selects pre-treatment, ceramic video disc membrane filtration system and reverse osmosis system to combine, produces water and stablizes, and produces water water quality and meets PVC polymerization technique water.
Fig. 1 is the one-piece construction schematic diagram of the device that the utility model adopts, as shown in Figure 1: the utility model provides the device of employing to comprise aeration tank 1, waste water lifting pump 2, settling tank 3, ceramic video disc membrane filtration system fresh feed pump 4, ceramic video disc membrane filter appts 5, ceramic video disc membrane filter appts product water water pot 6, reverse osmosis filtration system charging high-pressure pump 7, reverse-osmosis filtering device 8 and product water pot 9; Aeration tank 1 is connected by waste water lifting pump 2 with settling tank 3, settling tank 3 is connected with ceramic video disc membrane filter appts 5, ceramic video disc membrane filtration system fresh feed pump 4 is installed between settling tank 3 and ceramic video disc membrane filter appts 5, pottery video disc membrane filter appts 5 is connected with ceramic video disc membrane filter appts and produces water water pot 6, pottery video disc membrane filter appts produces water water pot 6 and is connected on reverse-osmosis filtering device 8 by reverse osmosis filtration system charging high-pressure pump 7, and reverse-osmosis filtering device 8 also connects settling tank 3 and product water pot 9 by pipeline.
A treatment process for PVC mother liquor waste water treatment for reuse, comprises the steps:
(1), PVC mother liquor waste water is through aerating oxidation desulfurization, organics removal and phosphide, and add sulphur acid for adjusting pH, through pH on-line computing model control pH 6.5 ~ 8.5, PVC mother liquor waste water is greater than 10 hours in the residence time of aeration tank, and chemical oxygen demand (COD) clearance is greater than 70%;
(2), waste water is behind aeration tank, enter into settling tank sedimentation, add polymerize aluminum chloride and polyacrylamide, coagulating is carried out with organic and inorganic particle small in waste water, remove most suspended substances, suspension content is lower than 20mg/L, and after sedimentation, water outlet is comparatively limpid, and the material clearances such as total organism, sulfide and phosphide are higher; The reaction times of this step is not less than 4 hours;
(3) clear liquid, overflowed through settling bowl flows into ceramic video disc membrane filter appts and produces water water pot 6, ceramic video disc membrane filter appts 5 is transported to by ceramic video disc membrane filtration system fresh feed pump 4, the ceramic video disc film precision that pottery video disc membrane filter appts 5 adopts is 0.05 ~ 2 μm, operation pressure reduction is 0.05 ~ 0.5MPa, video disc rotating speed is 100 ~ 600 revs/min, kickback pressure 0.1 ~ 0.3MPa, recoil timed interval 1 ~ 2h/ time, the ceramic video disc membrane filtration system matting time be 1 ~ June/time;
The macromolecular substance (comprising tiny PVC granule, colloid etc.) being greater than ceramic video disc film precision after process in water body is trapped in dense water side, and the organism containing part small-molecular-weight and salt then enter into per-meate side water body through film;
(4) penetrating fluid, obtained after ceramic video disc membrane filter appts 5 processes enters into reverse-osmosis filtering device 8, remove the salinity of in water body more than 98% and most of organism, reverse osmosis product water be used for polymerization technique water, reverse osmosis concentrated water then return settling tank or for the production of rush still, whizzer rinse;
In step (4), need through 5 μm of cartridge filters before entering reverse-osmosis filtering device 8, through high-pressure pump, working pressure 0.7 ~ 2MPa, service temperature 10 ~ 40 DEG C, the rate of recovery 75%, when dense water returns settling tank, then the rate of recovery is higher than 90%, the reverse osmosis filtration system matting time be 6 ~ December/time.
Here is specific embodiment:
PVC mother liquor waste water water quality: suspended substance≤200mg/L, COD content 60 ~ 350mg/L, specific conductivity is 70 ~ 150 μ s/cm, and pH value is 6 ~ 9.PVC mother liquor waste water is delivered to aeration tank 1, and adjust ph is 6.5 ~ 8.5, and the material such as organics removal and phosphide, in aeration tank 1, waste water quality is: suspended substance≤30mg/L, COD content≤60mg/L, and specific conductivity is 70 ~ 150 μ s/cm.By waste water lifting pump 2, by the sewage transport in aeration tank to settling tank 3, add appropriate coagulating agent PAC (polymerize aluminum chloride), by the alumen ustum of the coacervating large particles such as the suspended substance in pretreated water, organism and colloid, in settling tank, the residence time is about 4h, product water after process is about suspension content≤20mg/L, COD content≤50mg/L, and specific conductivity is 70 ~ 150 μ s/cm.Upper strata process clear liquid enters into ceramic video disc membrane filter appts 5 through ceramic video disc membrane filtration system fresh feed pump 4, ceramic video disc film precision 200nm, the permeable pressure head 0.2MPa of selection, motor rotations 400 revs/min, permeation flux 70L/m
2h, the infiltration clear liquid obtained after filtering enters into ceramic video disc membrane filter appts and produces water water pot 6, and the suspension content produced in water is about 1mg/L, COD content≤30, and specific conductivity is 70 ~ 150 μ s/cm, and dope then turns back to settling tank 3.By reverse osmosis filtration system charging high-pressure pump 7, the feed liquid that ceramic video disc membrane filter appts produces in water water pot 6 is delivered in reverse-osmosis filtering device 8, by the filtration of reverse-osmosis filtering device 8, salinity major part in water body is removed, suspension content in product water is about 0mg/L, and COD content is about 0mg/L, specific conductivity≤10mg/L, produce water water quality and meet polymerization reaction kettle process water, reverse osmosis concentrated water returns settling tank 3.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall within the scope of claimed the utility model, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. a treatment unit for PVC mother liquor waste water treatment for reuse, is characterized in that: described treatment unit comprises: aeration tank, waste water lifting pump, settling tank, ceramic video disc membrane filtration system fresh feed pump, ceramic video disc membrane filter appts, ceramic video disc membrane filter appts produce water water pot, reverse osmosis filtration system charging high-pressure pump, reverse-osmosis filtering device and product water pot; Described aeration tank is connected by waste water lifting pump with settling tank, described settling tank is connected with ceramic video disc membrane filter appts, ceramic video disc membrane filtration system fresh feed pump is installed between settling tank and ceramic video disc membrane filter appts, pottery video disc membrane filter appts is connected with ceramic video disc membrane filter appts and produces water water pot, pottery video disc membrane filter appts produces water water pot and is connected on reverse-osmosis filtering device by reverse osmosis filtration system charging high-pressure pump, and reverse-osmosis filtering device also connects settling tank and product water pot by pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420578778.6U CN204174014U (en) | 2014-10-09 | 2014-10-09 | A kind for the treatment of unit of PVC mother liquor waste water treatment for reuse |
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| CN201420578778.6U CN204174014U (en) | 2014-10-09 | 2014-10-09 | A kind for the treatment of unit of PVC mother liquor waste water treatment for reuse |
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| CN204174014U true CN204174014U (en) | 2015-02-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104291487A (en) * | 2014-10-09 | 2015-01-21 | 上海安赐机械设备有限公司 | Treatment device and treatment method for treating and recycling PVC mother liquid wastewater |
| CN107570011A (en) * | 2017-09-26 | 2018-01-12 | 上海安赐环保科技股份有限公司 | A kind of ultrafiltration apparatus and its technique that slurry oil is thrown away applied to catalytic cracking process |
-
2014
- 2014-10-09 CN CN201420578778.6U patent/CN204174014U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104291487A (en) * | 2014-10-09 | 2015-01-21 | 上海安赐机械设备有限公司 | Treatment device and treatment method for treating and recycling PVC mother liquid wastewater |
| CN107570011A (en) * | 2017-09-26 | 2018-01-12 | 上海安赐环保科技股份有限公司 | A kind of ultrafiltration apparatus and its technique that slurry oil is thrown away applied to catalytic cracking process |
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| C14 | Grant of patent or utility model | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 201201 Shanghai, Pudong New Area Jin Tang Road, No. 2, block B, 145 Patentee after: SHANGHAI ANHORN ENVIRONMENTAL TECHNOLOGY CO., LTD. Address before: 201201 Shanghai, Pudong New Area Jin Tang Road, No. 2, block B, 145 Patentee before: Shanghai Anhorn Mechanical Equipment Co., Ltd. |