CN1631819A - Process for circulating and reusing wastewater in production of case plank paper by wastepaper - Google Patents
Process for circulating and reusing wastewater in production of case plank paper by wastepaper Download PDFInfo
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- CN1631819A CN1631819A CN 200410093835 CN200410093835A CN1631819A CN 1631819 A CN1631819 A CN 1631819A CN 200410093835 CN200410093835 CN 200410093835 CN 200410093835 A CN200410093835 A CN 200410093835A CN 1631819 A CN1631819 A CN 1631819A
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Abstract
Disclosed is a method for recycling and reusing waste water generated in box paper production, which mainly includes the steps of fiber recycling, sand falling in depositing poor, high effective air-floating clearing suspended matter, filtration and purification of SBR biological reactor, mud procession and so on. In the method, the waste water is processed through fiber recycling, sand falling and air floating processions, the majority of water is sent to workshop directly to be reused, and another part is purified by the SBR biological reactor, which eliminates the solvable waste to avoid its accumulation, so that increasing the quality of water. The process design of the processing system is reasonable, the equipment needs smaller square, it has reduced the engineering investment and operation cost suitable for recycling and reuse of the waste water of national and foreign waste paper box production, regenerating mash and original mash and corrugated paper and Kraft paper comb to produce paper box corrugated paper and Kraft paper.
Description
Technical field
The present invention relates to the Waste Water of Pulp and Paper Making from Waste Paper circulative reuse treatment method, relate in particular to a kind of process for circulating and reusing wastewater in production of case plank paper by wastepaper.
Background technology
Wastepaper pulping and papermaking is not only a kind of effective way that solves China's paper grade (stock) wood fiber raw material shortage, and can be reduced paper-making effluent water pollution is loaded, and has alleviated the pollution to environment.With litter decoration paperboard (OCC), the non-deinking slurry of kraft paperboard scrap stock (DLK) regeneration is produced the various commerce that adapt to market and people's lives needs such as corrugated cardboard, boxboard and white board etc. when using cardboard, though the contaminated wastewater load of machinery systems of discharging, low many of the waste water that is produced than the pulp from decoloured waste paper Reclaimed board, but the generation of its waste water is quite a lot of, consumes a large amount of clear water.Because it is less that selected wastepaper as raw material contains foreign material, be no more than 1%, the waste water of discharging is generally handled by clarification filtration or air-float filtration method, gets final product reuse, or by recirculation reuse after clarification and the biochemical treatment, therefore, as a whole, the wastewater treatment ratio of selecting for use waste paper such as litter decoration paperboard, kraft paperboard scrap stock to produce boxboard is easier to realize sealing or totally-enclosed processing that wherein waste water is totally-enclosed, i.e. " zero release ", waste water are no longer outwards discharged.
Because kind, the source place of waste paper and waste paperboard are different, and the cardboard kind that requires of the various different masies of the system of copying, the characteristic of the waste water that is produced is also inequality.For example have in the old useless Corrugated Box paperboard of import and be lumber fibre more than 90%, suspended substance in the recycled pulp system paper waste water, the fines content height, it is low that BOD accounts for the COD ratio, biodegradability is poor, this waste water seal or totally-enclosed processing after water chronically in continuous cyclically utilizing process, noxious pollutant and salt in water system, will occur and in backwater, constantly gather also acceleration equipment and Corrosion of Pipeline, anionic trash accumulation (refer to accumulate gradually colloidalmaterial and tiny pollution substance), the propagation of microorganism, problem such as secondary adhesive and influence the paper machine and run well and quality product, therefore, the waste paperboard that needs to be resolved hurrily is produced problem in the cyclically utilizing of waste water of boxboard.
At the problem in the above-mentioned circulating and reusing wastewater in production of case plank paper by wastepaper, the invention provides a kind of process for circulating and reusing wastewater in production of case plank paper by wastepaper, this treatment process is under both economical condition, remove the suspended matters such as a large amount of fibers that waste water contains, and eliminate the pollutant accumulation problem that causes by waste water circulation, have problems thereby solve in the waste water circulation to greatest extent, and then reach cyclically utilizing purpose constantly, satisfy the paper technology demand.
For realizing purpose of the present invention, the technical scheme that is adopted is: a kind of process for circulating and reusing wastewater in production of case plank paper by wastepaper, it is characterized in that: adopt the suspended substance in the air supporting method removal full dose waste water, the other filter of the other filter of fiber fines and foreign material and the employing SBR bio-reactor method of purification purifies part cyclically utilizing water, the operation of this method, mainly comprise: the paper machine room wastewater collection, robust fibre reclaims, preceding equalizing tank, sedimentation is removed sand, the air supporting method is removed suspended matter, equalizing tank, the other filter of SBR bio-reactor purifies, the water purification reuse, operations such as sludge treatment
The technological operation step of this method:
1), paper machine room waste water enters the wastewater treatment stage after trench is collected;
2), waste water is 40-160 purpose rolling shaft screen sieving by mesh and reclaims robust fibre, recycled fiber is gone into the reuse of waterpower pulping engine system through go-no-go is laggard;
3), remove coarse-fibred waste water and enter rapid sedimentation tank impurity such as remove sand through preceding equalizing tank;
4), enter the high-efficient shallow air flotation pond and carry out solid-liquid and separate, remove a large amount of fiber fines and other suspended matter after water outlet be called process water, wherein part process water direct reuse workshop recycles;
5), another part process water delivers to the SBR bio-reactor and carries out side filter purifying treatment, the water reuse workshop after the biological other filter purifying treatment recycles, sludge press filtration is handled;
The time that described waste water stops in rapid sedimentation tank is 5-15 minute;
The time that described waste water stops in the high-efficient shallow air flotation pond is 10-30 minute, ash-retention efficiency 2%-15%;
The water yield of the other filter of described SBR bio-reactor purifying treatment is the 15%-75% that total wastewater flow rate is handled in air supporting, handles the per-cent adjustment of the scale of the water yield according to the shared TOD of solvable capable property COD;
Described process water was handled cycle 6-24 hour in the other filter of sbr reactor device biology purifying treatment, wherein: water inlet: 0.5-2.5 hour, aeration: 2-16 hour, precipitation: 0.5-3 hour, strain water: 1-4 hour, leave standstill: 0.5-4 hour;
The other filter of described SBR bio-reactor purifying treatment, its operational condition span of control is: temperature: 5-40 ℃, the pH value; 6.5-9.0, dissolved oxygen: 0.25-4mg/l, mud SV
30: 10%-45%.
In process for circulating and reusing wastewater in production of case plank paper by wastepaper of the present invention, all total amount waste water are not all passed through the other filter of SBR bio-reactor purifying treatment in each circulating treatment procedure, carry out the biopurification processing but get part recirculated water, must be under the enhancing situation at the stable of biological treatment, removed dissolubility pollutant in the waste water to greatest extent, guaranteed to loop back the water quality of water, saved waste water circular treatment expense simultaneously, and reduced construction investment.
Beneficial effect of the present invention and remarkable advantage:
By above technical scheme as can be known, the present invention carries out the high-efficient shallow air flotation processing to full dose waste water and partly loops back water carrying out the other filter of SBR bio-reactor purifying treatment, has showed useful effect:
Full dose waste water is handled in the air supporting of high-efficient shallow air flotation pond, suspended matters such as the fiber fines that has in the waste water, packing material have been removed, eliminate the influence of fine suspension to paper-making process, part loops back water by biological other filter purifying treatment, reduce COD and BOD contamination index in the cyclically utilizing water system, avoid objectionable impurities constantly to circulate and constantly accumulation with looping back water, thereby the problem that exists in the solution circulating and reusing wastewater in production of case plank paper by wastepaper, and then reach the closed cyclically utilizing purpose of waste water, water loss in the minimizing system reduces the fresh water consumption.
Remarkable advantage: 1, facility investment of the present invention is few, and stable operation can satisfy the closed circulation needs; 2, adopt the rolling shaft screen to substitute grid, equipment is simple, cleans easily, and less investment also has the fiber recovery function; 3, adopt SBR method processing mode, the biochemical reaction impellent is big, realize the anaerobic and aerobic alternate cycles in the pond, treatment effect is good, can effectively control sludge bulking, can suitably adjust operation according to the water quality situation in the treating processes, guarantee effluent quality, the other filter influent COD of SBR method biology concentration is 1000-2400mg/l, and effluent COD concentration is reduced to 75-150mg/l, can be back to papermaking and recycle; 4, Waste Water Treatment itself is a combined system, helps the enlarging of waste water disposal facility.
Description of drawings
Fig. 1 is the treatment process synoptic diagram of treatment process of the present invention;
Fig. 2 is the process flow diagram of treatment process of the present invention.
Embodiment
Below in conjunction with drawings and Examples the inventive method is described in further detail.Of particular note, protection scope of the present invention should include but not limited to the disclosed technology contents of present embodiment.
Embodiment
With homemade old litter decoration and 11# or the U.S. waste paper of 13# is paper making raw material, produces C level, B level boxboard, the U.S. waste paper of described 11#, be called old corrugated container again, its surface layer is imitative case paper pulp, jute pulp or ox-hide wood pulp, and foreign material are no more than 1%, and defective waste paper total amount does not surpass 5%.The U.S. waste paper of 13# is the new scrap stock of a kind of two-sided ox-hide fluting board, and its liners is jute pulp or kraft pulp or imitative boxboard paper pulp, and the not surface treatment of its sandwich layer or surface layer does not allow foreign material and sneaks into, and defective waste paper total amount must not surpass 1%.Select for use above-mentioned waste paper to copy the system boxboard, the treatment process of the process for circulating and reusing wastewater that it is produced in producing, as shown in Figure 1, comprise mainly that paper machine room waste water, robust fibre recovery, preceding equalizing tank, sedimentation are removed sand, air supporting removal of impurities, equalizing tank, workshop reuse, the other filter of SBR biology purify and the sludge treatment operation; Described sewage treatment technology process, as shown in Figure 2, its process conditions is:
1), paper machine room waste water 1 is collected through trench and is entered Waste Water Treatment;
2), robust fibre reclaims: the robust fibre that adopts 80 order rolling shaft screens 2 to reclaim in the waste water, the fiber of recovery are gone into the reuse of waterpower pulping system through go-no-go is laggard;
3), the waste water that reclaims behind the robust fibre enters rapid sedimentation tank 4 through preceding equalizing tank 3, stopped 6 minutes, except that silt;
4), the waste water that removes behind the silt sends high-efficient shallow air flotation pond 5 to, stops ash-retention efficiency 3%-5% 15 minutes; Wherein part air supporting water outlet (title process water) recycles through between equalizing tank 6 direct carriage returns, a part of in addition water is delivered to 2 the SBR bio-reactors (preface batch activated sludge process) 8 that are arranged on equalizing tank 6 sides and is carried out the other filter of biology purifying treatment, discharges mud 9 and carries out the press filtration processing;
5), deliver to the water that the other filter of SBR bio-reactor is handled, its treatment capacity accounts for air supporting and handles 30% of the water yield, the processing cycle in the SBR bio-reactor be divided into 8 hours and 12 hours two kinds, each stage processing time of 8 hours periods is respectively:
Water inlet: 1.5 hours,
Aeration: 4 hours,
Precipitation: 0.5 hour,
Strain water: 1.5 hours,
Leave standstill: 0.5 hour.
Each stage processing time of 12 hours periods is respectively:
Water inlet: 2.0 hours,
Aeration: 6.0 hours,
Precipitation: 1.0 hours,
Strain water: 2.0 hours,
Leave standstill: 1.0 hours.
The other filter of described sbr reactor device biology purifying treatment, its operational condition span of control is: temperature: 5 ℃-40 ℃, the pH value; 6.5-9.0, dissolved oxygen: 0.25-4mg/l, mud SV
30: 10%-45%.
Water purification after different cycles is handled is sent the paper machine room production system back to and is recycled.
Adopt the inventive method to handle the non-deinking slurry of the U.S. waste paper of homemade waste and old corrugation case paper and 11# or the 13# recycled pulp system of the copying waste water that boxboard produced, the COD load that advances the waste water before the other filter of SBR bio-reactor purifies is 1000-2400mg/l, biopurification is handled back water outlet COD load and is reduced to 75-150mg/l, and this loops back water water quality and has satisfied the production water demand fully.
Adopt the high-efficient shallow air flotation method, suspended substances such as the fiber fines that has in the removal circulating water system, filler, thus can eliminate the influence of fine suspension to paper-making process.
Adopt the other filter of SBR bio-reactor purifying method, can eliminate the accumulation problem of all contaminations.In purifying treatment, adopt biological other filtering method, only portion water in the circulating water system is handled, improved the operability of biological treatment, meanwhile, can reduce biological treatment investment and running cost; In biological other filter is handled, adopt SBR (preface batch active sludge treatment) method to handle, simplified the biological treatment facility, improved the biological treatment reliability, guarantee the stability of effluent quality, reached the closed cyclically utilizing purpose of waste water, thereby reduced the fresh water consumption.
Claims (6)
1, a kind of process for circulating and reusing wastewater in production of case plank paper by wastepaper, it is characterized in that: suspended substance, fiber fines and foreign material and the other filter of the other filter of the employing SBR bio-reactor method of purification of adopting the air supporting method to remove in the full dose waste water purify part cyclically utilizing water, the operation of this method, mainly comprise: paper machine room wastewater collection, robust fibre recovery, preceding equalizing tank, sedimentation are removed sand, the air supporting method is filtered purification by removing suspended matter, equalizing tank, SBR bio-reactor, operations such as water purification reuse, sludge treatment, the technological operation step of this method:
1), paper machine room waste water enters the wastewater treatment stage after trench is collected;
2), waste water is 40-160 purpose rolling shaft screen sieving by mesh and reclaims robust fibre, recycled fiber is gone into the reuse of waterpower pulping engine system through go-no-go is laggard;
3), remove coarse-fibred waste water and enter rapid sedimentation tank impurity such as remove sand through preceding equalizing tank;
4), enter the high-efficient shallow air flotation pond and carry out solid-liquid and separate, remove a large amount of fiber fines and other suspended matter after water outlet be called process water, wherein part process water direct reuse workshop recycles;
5), another part process water delivers to the SBR bio-reactor and carries out side filter purifying treatment, the water reuse workshop after the biological other filter purifying treatment recycles.
2, process for circulating and reusing wastewater in production of case plank paper by wastepaper according to claim 1 is characterized in that: the time that waste water stops in described rapid sedimentation tank is 5-15 minute.
3, waste paper according to claim 1 is produced the process for circulating and reusing wastewater of boxboard, and it is characterized in that: the time that waste water stops in described high-efficient shallow air flotation pond is 10-30 minute, ash-retention efficiency 2%-15%.
4, process for circulating and reusing wastewater in production of case plank paper by wastepaper according to claim 1, it is characterized in that: the other filter of described SBR bio-reactor purifying treatment, the processing water yield of Chu Liing is the 15%-75% of air supporting treatment capacity therein, and the size of ratio is according to the per-cent adjustment of the shared TOD of solvable capable property COD.
5, the other filter of SBR bio-reactor according to claim 4 purifying treatment, it is characterized in that: described part process water is in the other filter of sbr reactor device biology purifying treatment, 6-24 hour processing cycle, wherein: water inlet: 0.5-2.5 hour, aeration: 2-16 hour, precipitation: 0.5-3 hour, strain water: 1-4 hour, leave standstill: 0.5-4 hour.
6, the other filter of SBR bio-reactor according to claim 1 purifying treatment is characterized in that: the operational condition span of control of the other filter of described SBR bio-reactor purifying treatment is: temperature: 5-40 ℃, and the pH value; 6.5-9.0, dissolved oxygen: 0.25-4mg/l, mud SV
30: 10%-45%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410093835 CN1257119C (en) | 2004-12-03 | 2004-12-03 | Process for circulating and reusing wastewater in production of case plank paper by wastepaper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410093835 CN1257119C (en) | 2004-12-03 | 2004-12-03 | Process for circulating and reusing wastewater in production of case plank paper by wastepaper |
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| CN1631819A true CN1631819A (en) | 2005-06-29 |
| CN1257119C CN1257119C (en) | 2006-05-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310720A (en) * | 2014-11-12 | 2015-01-28 | 福建农正鸿发纸业有限责任公司 | Method for treating paper-making wastewater |
| CN104671588A (en) * | 2015-01-06 | 2015-06-03 | 江苏理文造纸有限公司 | Method for treating pulping and papermaking wastewater |
| CN107758979A (en) * | 2016-08-16 | 2018-03-06 | 贵阳时代沃顿科技有限公司 | A kind of woodwork processing wastewater treatment method and processing unit |
| CN110668585A (en) * | 2019-08-15 | 2020-01-10 | 四川今典印刷包装有限公司 | Corrugated board line waste water recovery cyclic utilization system |
-
2004
- 2004-12-03 CN CN 200410093835 patent/CN1257119C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310720A (en) * | 2014-11-12 | 2015-01-28 | 福建农正鸿发纸业有限责任公司 | Method for treating paper-making wastewater |
| CN104671588A (en) * | 2015-01-06 | 2015-06-03 | 江苏理文造纸有限公司 | Method for treating pulping and papermaking wastewater |
| CN107758979A (en) * | 2016-08-16 | 2018-03-06 | 贵阳时代沃顿科技有限公司 | A kind of woodwork processing wastewater treatment method and processing unit |
| CN110668585A (en) * | 2019-08-15 | 2020-01-10 | 四川今典印刷包装有限公司 | Corrugated board line waste water recovery cyclic utilization system |
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| Publication number | Publication date |
|---|---|
| CN1257119C (en) | 2006-05-24 |
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