CN1062322C - Flocculation-precipitation treatment method and equipment for waste paper deinking waste water - Google Patents
Flocculation-precipitation treatment method and equipment for waste paper deinking waste water Download PDFInfo
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- CN1062322C CN1062322C CN97114281A CN97114281A CN1062322C CN 1062322 C CN1062322 C CN 1062322C CN 97114281 A CN97114281 A CN 97114281A CN 97114281 A CN97114281 A CN 97114281A CN 1062322 C CN1062322 C CN 1062322C
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Abstract
The present invention relates to a method and the design of a key apparatus, namely a purifier for treating the intermittent or continuous flocculation-precipitation in deinked waste water generated in the process of pulping with waste paper for paper making. Based on the total weight of waste water, 0 to 800 ppm of aluminium sulfate Al2 (SO4) 3 and 200 to 400 ppm of aluminum chlorohydrate with the structural formula of [Al2 (OH)< m >Cl < 6-m >]n are used as flocculant agents. The purifier comprises reaction areas I and II, a fluidized clarifying area III, a mixing back flow area IV and a dreg precipitation area V, wherein each of the reaction areas comprises a nozzle, a Venturi tube, an inner cylindrical body, an outer cylindrical body and a pair of trumpet-shaped enclosure combinations whose surrounded walls are provided with uniformly-distributed pore canals. The method and the purifier have the advantages of short stay time of waste water, high treatment efficiency, favorable effect and easy realization of industrialization.
Description
The present invention relates to wastewater processing technology, refer to utilize waste paper to produce the processing method and used key equipment--the clarifier thereof of the deinking wastewater that is produced when de inked pulp carries out pulping and paper-making particularly.
Along with the pay attention to day by day of people to environmental protection and natural resources, utilizing waste paper to produce de inked pulp, to carry out pulping and paper-making just more and more general.Utilize waste paper to carry out pulping and paper-making and saved natural resources, also avoided directly utilizing the plant material slurrying produced pollution simultaneously, still, in the deinking process of waste paper, still can produce a large amount of deinking wastewaters.SS in these waste water (suspended matter), BOD
5(biological oxygen consumption content on the five), COD
Cr(chemical oxygen consumption (COC)) content is higher, does not far reach discharging standards, and deinking wastewater has caused people's great attention as a kind of new pollution sources, and begins to seek the various methods that can be used for handling deinking wastewater, because COD in the deinking wastewater
CrContent is higher, BOD
5Content is lower, and BOD
5/ COD
CrBe generally less than 30%, thereby be difficult for adopting biochemical method to handle this kind waste water.At present, this kind waste water adopts air-float method to handle more, " environmental project ", disclose a kind of air supporting method in NO.1 (1996) " primary treatment of the waste paper deinking waste water " literary composition and handled the method for deinking wastewater, though can accelerate the layering of suspended matter and treatment fluid in the waste water when handling waste paper deinking waste water in this way, the equipment needed thereby investment is big, molten gas complicated operation, and the processing time is long, and the clearance of every contamination index is also lower in the waste water.
At present, mainly be inclined-plate clarifying basin or flotation tank with the equipment of Coagulation with Treatment paper waste, flocculant is to realize in different structures with the separating of mixing, reaction and flocculate of waste water, and this makes that the treatment facility floor space is big, and the time of staying is long.Continue to use the clarifier of using in other Industrial Wastewater Treatment, though waste water can be mixed with flocculant, reaction, precipitation process realize in same equipment, poor processing effect, effluent characteristics does not reach discharge standard.
The objective of the invention is to overcome the deficiencies in the prior art part, characteristic according to suspended matter proportion in the deinking wastewater and colloid Z-current potential, find out a kind of flocculation--intermediate processing and optimum process condition, suspended matter in the waste water is efficiently adsorbed, flocculation, effects such as bridge formation, thereby rapid precipitation is got off, provide a kind of to need the batch (-type) of efficient flocculant and solid-liquid separation equipment or flocculation--the precipitation treatment method of continous mode waste paper deinking waste water, this method is easy and simple to handle, the expense of handling waste water is low, effective, shorten the solid-liquid separation time simultaneously, thereby improved treatment effeciency greatly; And integrate the purification of waste water device that mixing, reaction, fluidisation are clarified for realizing that this method development is a kind of, to realize the serialization operation and to shorten the wastewater treatment time greatly and improve treatment effect.
The objective of the invention is to reach by following measure:
A kind of flocculation of batch (-type) waste paper deinking waste water--precipitation treatment method, substep adds the aluminum sulfate Al by waste water gross weight 0～800ppm in the waste paper deinking waste water pond
2(SO
4)
3With the structural formula of 200～400ppm be [Al
2(OH)
mCl
6-m]
nAluminium polychloride (PAC) as flocculant, mix back flocculation, precipitation, separation through substep.
A kind of flocculation of continous mode waste paper deinking waste water--precipitation treatment method, waste paper deinking waste water and by the aluminum sulfate Al of waste water gross weight 0～800ppm
2(SO
4)
3With the structural formula of 200～400ppm be [Al
2(OH)
mCl
6-m]
nAluminium polychloride (PAC) prepare respectively, and after the metering, by the nozzle that is pumped to the purification of waste water device, be spurting through the waste water of nozzle and flocculant and spray into the Venturi tube bottom, be promoted to the first reaction zone I by the gap between Venturi tube bottom and the nozzle, anemostat top overflow through venturi flows into the second reaction zone II again, in the reaction zone I, waste water and flocculant fully mix in the II, reaction, the part floccule sinks to the mixed zone IV, waste water then flows into fluidisation settling section III, in fluidisation settling section III, form an adsorption filtration bed by the flocculate in the waste water, when processed waste water flow through, the flocculate in the waste water can further be adsorbed, filter, thereby improved treatment effect.
A kind of flocculation of serialization waste paper deinking waste water--the clarifier that precipitation treatment method adopted is characterized in that the lower end of Venturi tube is relative with nozzle, and is sleeved on during the tubaeform skirt that has even duct on a pair of leg encloses; The anemostat of Venturi tube is sleeved in the inner barrel, and inner barrel and tubaeform skirt enclose and all be sleeved in the outer cylinder body; Nozzle and scum pipe are equipped with in the outer cylinder body lower end, and the upper outside end face is provided with the outer ring water leg, and inner barrel upper end medial surface is provided with the inner ring water leg, and inside and outside circle water leg links to each other by water-supply-pipe and communicates with drainpipe.
The present invention compared with prior art has following advantage:
1, efficient height, effective:
Before the present invention made, the processing of deinking wastewater mainly was to add general flocculant to carry out the air supporting processing, and floc sedimentation forms slowly, about 1 hour of separation time, SS, BOD
5, COD
CrDeng clearance only be about 50%, and when adopting this flocculant and process to handle deinking wastewater, floc sedimentation forms soon, the sedimentation separation time is need 15 minutes only, SS, COD
Cr, BOD
5Clearance can reach 72%, 63% respectively, more than 51%.
2, handle deinking wastewater with the present invention and do not need molten gas disposal, do not adopt air-floating apparatus, thereby significantly reduced the investment and the operating cost of wastewater treatment operation, and operation is simple, is easy to industrialization.
3, water purifier compact conformation, collection mixing, reaction, fluidisation clarification are one, and retention time of sewage is short, and treatment effeciency significantly improves, thereby has significantly reduced the floor space of equipment.
4, this law is applicable to the intermittent operation of waste paper deinking waste water; but and electricity serialization operation when adopting clarifier of the present invention; deinking wastewater after the present invention handles all can reach the secondary wastewater discharge standard of GB8978--88 (approval in 1988) defined; alleviated industrial pollution caused by paper manufacturing effectively, significant to the protection environment.
In sum, the present invention has good economic benefit and remarkable social benefit.
The flocculation of Fig. 1 serialization waste paper deinking waste water--the clarifier structural representation that precipitation treatment method adopted.
The invention will be further described by following embodiment and accompanying drawing thereof.
Dress contains SS (suspended matter) 582mg/l, COD in mixing pit
Cr(chemical oxygen consumption (COC)) 1180mg/l and BOD
5The waste paper deinking waste water 10l of (biological oxygen demand (BOD) on the five) 387mg/l under stirring condition, adds the aluminum sulfate Al of 5g earlier
2(SO
4)
3, after treating fully to mix, the structural formula that adds 3g again is [Al
2(OH)
mCl
6-m]
nAluminium polychloride (PAC), precipitate and get final product layering after 15 minutes, separate to such an extent that contain SS163mg/l, COD
Cr437mg/l, BOD
5The clear liquid of 190mg/l, SS, COD
Cr, BOD
5Clearance be respectively 72.0%, 63.0% and 51.0%.
Waste paper deinking waste water and equipment are all with embodiment 1, and also can adopt independent employing structural formula is [Al
2(OH)
mCl
6-m]
nAluminium polychloride (PAC) make flocculant, promptly press the technology of embodiment 1, the structural formula that once adds 3g is [AL
2(OH)
mCL
6-m]
nAluminium polychloride PAC, precipitate and get final product layering after 15 minutes, separate to such an extent that contain SS183mg/l, COD
Cr487mg/l and BOD
5The clear liquid of 208mg/l, SS, COD
Cr, BOD
5Clearance is respectively 68.5%, 58.7% and 46.2%.
As shown in Figure 1, the lower end of Venturi tube 9 is relative with the nozzle 12 that outer cylinder body 8 bottom thread connect, adjustable distance between Venturi tube 9 lower port and the nozzle 12 is 50～100mm, Venturi tube anemostat 6 connects screw rods 4 by suit and be fixed in the inner barrel 7 by four, inner barrel 7 by four water-supply-pipes 2 by suit and be fixed in the outer cylinder body 8.The lower semisection of Venturi tube 9 is sleeved on a pair of tubaeform skirt relative with inner barrel 7 and encloses in 10,11, upper and lower tubaeform skirt encloses 10,11 and installs relatively, the angle that two skirts enclose is 90 °, have the duct equably on the two skirt legs, following tubaeform skirt enclose 11 with outer cylinder body 8 bottom surfaces to fix its angle be 45 °.Inner barrel 7 upper end medial surfaces are provided with inner ring water leg 1, and outer cylinder body 8 upper end lateral surfaces are provided with outer ring water leg 3, are connected by four water-supply-pipes 2 between inner ring water leg 1 and the outer ring water leg 3.The upper outside face of outer cylinder body 8 also is provided with a drainpipe 5 that communicates with peripheral water leg 3, and its bottom surface is provided with scum pipe 13.It in the anemostat 6 of Venturi tube the first reaction zone I, outside the anemostat 6 of Venturi tube and the space between the inner barrel 7 is the second reaction zone II, space between inner barrel 7 and the outer cylinder body 8 is a fluidisation settling section III, the space that Venturi tube 9 lower semisections and a pair of tubaeform skirt enclose between 10,11 is the recirculating zone IV, following tubaeform skirt enclose 11 and the bottom of outer cylinder body 8 between the space be sediment district V.
The clarifier outer cylinder body diameter that present embodiment adopts is 2250mm, and height is 4600mm; The inner barrel diameter is 1340mm, and height is 3000mm; It is 950mm that skirt is placed opening diameter, and the greatest circle diameter is 1795mm; Footpath 375mm under the Venturi tube, nozzle opening diameter 37mm.Treating capacity is 36M
3/ h.It is 1.5% solution that flocculant aluminum sulfate is mixed with concentration, and aluminium polychloride by dilution in 1: 20, through the flowmeter metering, is pressed 1M
3/ h and 0.2M
3The flow velocity of/h adds flocculant aluminum sulfate solution and polymeric aluminum chlorides solution respectively or by 0.2M
3The flow list polyaddition liquor alumini chloridi of/h, make it slowly add the waste paper deinking waste water carrier pipe, then with waste water simultaneously by the nozzle 12 that is pumped to clarifier, waste water and flocculant through nozzle 12 are the bottom that spurting sprays into Venturi tube 9, and are promoted to the first reaction zone I by the gap between Venturi tube 9 bottoms and the nozzle 12.After waste water fully mixes, reacts with flocculant in the first reaction zone I, flow into the second reaction zone II through the overflow of the top of Venturi tube anemostat 6.After waste water further mixes, flocculates with flocculant in the second reaction zone II, the part floccule sinks to and mixes the recirculating zone IV, waste water flows into fluidisation settling section III, in fluidisation settling section III, form an adsorption filtration bed by the flocculate in the waste water, it highly is controlled to be 2000mm, when processed waste water flows through the adsorption filtration bed, floc sedimentation diameter in the waste water is further increased, and the tiny flocculate of part obtains adsorption filtration, and the waste water outflow of clarification flows into water leg 3 backs by drainpipe 5 dischargings.Flocculate in sediment district V is further being precipitated compression, the flocculate on V top, sediment district passes back into mixing recirculating zone IV through the duct that upper and lower flared type skirt encloses on 10,11, flocculate is mixed with waste water in the IV of recirculating zone mixing, and go into the reaction zone I with return of waste water, the bottom flocculate is discharged through scum pipe 13.Contain SS582mg/l, COD
Cr1180mg/l and BOD
5The waste water of 87mg/l after the above-mentioned method that adds aluminum sulfate and polymeric aluminum chlorides solution is handled, gets SS64mg/l, COD
Cr224mg/l and BOD
5The clear liquid of 116mg/l, SS, COD
Cr, BOD
5Clearance be respectively 89%, 81% and 70%.Single polyaddition aluminium chloride treatment effect also can get SS 76mg/L, COD
Cr251mg/L, BOD
5The treatment effect of 131mg/L, SS, COD
Cr, BOD
5Clearance be respectively: 87%, 79%, 66%.
Among the above embodiment, the deinking wastewater after disposal methods of the present invention all can reach the secondary wastewater discharge standard of GB8978-88 (approval in 1988) defined.
Claims (3)
1, a kind of flocculation of batch (-type) waste paper deinking waste water--precipitation treatment method is characterized in that the substep adding is by the aluminum sulfate AL of waste water gross weight 0～800ppm in the waste paper deinking waste water pond
2(SO
4)
3With the structural formula of 200～400ppm be [AL
2(OH)
mCl
6-m]
nAluminium polychloride (PAC) as flocculant, mix back flocculation, precipitation, separation through substep.
2, a kind of flocculation of serialization waste paper deinking waste water--precipitation treatment method is characterized in that waste paper deinking waste water and by the aluminum sulfate AL of waste water gross weight 0～800ppm
2(SO
4)
3With the structural formula of 200～400ppm be AL
2(OH)
mCl
6-m]
nAluminium polychloride (PAC) prepare respectively, and metering, by the nozzle that is pumped to the purification of waste water device, be spurting through the waste water of nozzle and flocculant and spray into the Venturi tube bottom, be promoted to the first reaction zone I by the gap between Venturi tube bottom and the nozzle, anemostat top overflow through Venturi tube flows into the second reaction zone II again, in the reaction I, waste water and flocculant fully mix in the II, reaction, the part flocculate sinks to and mixes the recirculating zone IV, waste water then flows into fluidisation settling section III, in fluidisation settling section III, form an adsorption filtration bed by the flocculate in the waste water, when processed waste water flow through, the flocculate in the waste water can further be adsorbed, filter.
3, a kind of flocculation of serialization waste paper deinking waste water--the water purifier that precipitation treatment method adopted, the lower end that it is characterized in that venturi (9) is relative with nozzle (12), and is sleeved on the tubaeform skirt that has even duct on a pair of leg and encloses in (10), (11); The anemostat of Venturi tube (6) is sleeved in the inner barrel (7), and inner barrel (7) and tubaeform skirt enclose (10), (11) all are sleeved in the outer cylinder body (8); Nozzle (12) and scum pipe (13) are equipped with in outer cylinder body (8) lower end; The upper outside end face is provided with outer ring water leg (3), and inner barrel (7) upper end medial surface is provided with inner ring water leg (1), and inside and outside circle water leg (1), (3) link to each other by water-supply-pipe (2) and communicate with drainpipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97114281A CN1062322C (en) | 1997-11-03 | 1997-11-03 | Flocculation-precipitation treatment method and equipment for waste paper deinking waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97114281A CN1062322C (en) | 1997-11-03 | 1997-11-03 | Flocculation-precipitation treatment method and equipment for waste paper deinking waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1180769A CN1180769A (en) | 1998-05-06 |
| CN1062322C true CN1062322C (en) | 2001-02-21 |
Family
ID=5172847
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97114281A Expired - Fee Related CN1062322C (en) | 1997-11-03 | 1997-11-03 | Flocculation-precipitation treatment method and equipment for waste paper deinking waste water |
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| Country | Link |
|---|---|
| CN (1) | CN1062322C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100368321C (en) * | 2005-10-19 | 2008-02-13 | 周国栋 | Ink waste liquid treatment for ink-jetting printer |
| CN102219285B (en) | 2011-05-17 | 2013-01-02 | 南京大学 | Continuous-flow inner-circulation resin exchanging and absorbing reactor imitating fluidized bed |
| CN110090473A (en) * | 2018-01-31 | 2019-08-06 | 沈阳铝镁设计研究院有限公司 | A kind of separation of solid and liquid feeding device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210154U (en) * | 1986-12-10 | 1987-12-05 | 孙建民 | Desulfurization dust remover with wet double-venturi device |
| CN2129170Y (en) * | 1992-06-27 | 1993-04-07 | 冯仕明 | High-efficiency wet-type dust cleaner |
| CN1108221A (en) * | 1994-03-10 | 1995-09-13 | 徐瑛瑛 | Water purification apparatus of fixed-on-pipeline type |
-
1997
- 1997-11-03 CN CN97114281A patent/CN1062322C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86210154U (en) * | 1986-12-10 | 1987-12-05 | 孙建民 | Desulfurization dust remover with wet double-venturi device |
| CN2129170Y (en) * | 1992-06-27 | 1993-04-07 | 冯仕明 | High-efficiency wet-type dust cleaner |
| CN1108221A (en) * | 1994-03-10 | 1995-09-13 | 徐瑛瑛 | Water purification apparatus of fixed-on-pipeline type |
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| Publication number | Publication date |
|---|---|
| CN1180769A (en) | 1998-05-06 |
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