CN1438385A - Waste-liquid treatment method for straw pulp paper-making - Google Patents
Waste-liquid treatment method for straw pulp paper-making Download PDFInfo
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- CN1438385A CN1438385A CN 02100662 CN02100662A CN1438385A CN 1438385 A CN1438385 A CN 1438385A CN 02100662 CN02100662 CN 02100662 CN 02100662 A CN02100662 A CN 02100662A CN 1438385 A CN1438385 A CN 1438385A
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- Prior art keywords
- black liquor
- pulp
- extraction equipment
- liquor extraction
- straw pulp
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- 239000010902 straw Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 29
- 239000000835 fiber Substances 0.000 claims abstract description 4
- 238000000605 extraction Methods 0.000 claims description 37
- 238000010790 dilution Methods 0.000 claims description 21
- 239000012895 dilution Substances 0.000 claims description 21
- 239000010865 sewage Substances 0.000 claims description 19
- 238000001914 filtration Methods 0.000 claims description 17
- 239000002002 slurry Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 9
- 238000011010 flushing procedure Methods 0.000 claims description 9
- OEYIOHPDSNJKLS-UHFFFAOYSA-N choline Chemical compound C[N+](C)(C)CCO OEYIOHPDSNJKLS-UHFFFAOYSA-N 0.000 claims description 6
- 229960001231 choline Drugs 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000005189 flocculation Methods 0.000 claims description 6
- 230000016615 flocculation Effects 0.000 claims description 6
- 238000005188 flotation Methods 0.000 claims description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 6
- 238000004537 pulping Methods 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 5
- 238000005273 aeration Methods 0.000 claims description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium chloride Substances Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 3
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 claims description 3
- 150000004056 anthraquinones Chemical class 0.000 claims description 3
- -1 compound aluminium chloride Chemical class 0.000 claims description 3
- 230000003203 everyday effect Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000036284 oxygen consumption Effects 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 235000010265 sodium sulphite Nutrition 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 2
- 239000000701 coagulant Substances 0.000 abstract 1
- 238000010411 cooking Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The invention relates to a kind of waste liquid treating method in straw pulp paper making. The straw pulp materials is transmitted into cooking ball to cook and makes up raw pulp; the raw pulp is extracted black liquid through squeezing device three times; then carries on pulp making process, the output white water passes through a inclined net filter device and collects the paper pulp fiber, the white water pours into a pool; adds flocculent into the pool, then enters air floated device, at the same time, carries on aeroation and adds in coagulant aids; scruffs collected by air floating device pass through concentrating pool, pulp pool, beats and enters the mud pool, the remnant clean water can be discharged directly or circulated to be used again.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, especially a kind of sewage water treatment method of papermaking straw pulp.
Background technology
Paper industry is one of comparatively serious industry of environmental pollution, and it mainly pollutes the various waste water that produce from pulping and papermaking processes.
To the processing that pulping and paper-making pollutes, each producer has all taked different measure both at home and abroad.Understand according to investigations, they are administered thoroughly, compliance with environmental protection requirements.But the most important thing is because of administering operating cost very highly, make papermaking enterprise normally stable operation and the main cause that causes waste water can not stably reaching standard to discharge.
Summary of the invention
The purpose of this invention is to provide that a kind of operating cost is low, the method for sewage disposal that can qualified discharge.
The method of papermaking straw pulp sewage disposal of the present invention comprises the steps:
1. the papermaking straw pulp raw material is sent into boiling in the rotary spherical digester, make magma;
2. described magma is extracted black liquor through three extrusion equipments;
3. the magma of having extracted black liquor is sent into pulping process and is carried out slurrying, and the plain boiled water of its output is by an oblique net filtration device collection paper pulp fiber, and the plain boiled water of filtering enters a collecting tank;
4. in collecting tank, add flocculant, pump into the super efficiency shallow air flotation device, carry out aeration simultaneously and add flocculation aid by pump;
5. the scum silica frost that the super efficiency shallow air flotation device is collected enters sludge-tank through paper pulp concentration basin, the stirring of paper pulp pond, and last clear water can directly discharge or reuse.
The method of papermaking straw pulp sewage disposal of the present invention, wherein 1. in spherical digester, add the sodium sulfite that accounts for straw pulp weight 13～15% in the step the, account for the formaldehyde and the anthraquinone that accounts for straw pulp weight 0.03～0.05% of straw pulp weight 13～1.4%, they are mixed, and be heated to 160～175 ℃, reacted 3 hours.
2. the method for papermaking straw pulp sewage disposal of the present invention wherein comprises the steps: in the step
1. will be diluted to 8～9% from the magma of rotary spherical digester ejection, and behind pulp screen, send into first black liquor extraction equipment and push, the concentrated black liquid 50-60% that extrudes sends to drying, and remainder is back to and is used for dilution in the magma;
2. the slurries from first black liquor extraction equipment are diluted to 8～9%, pump into second black liquor extraction equipment then, carry out press filtration, the 80-90% choline of the rare black liquor of one-level that is leached returns rotary spherical digester, and remainder is sent to drying;
3. with flushing with clean water second black liquor extraction equipment, used clear water enters in the slurries, is used for dilution;
4. the slurries from second black liquor extraction equipment are diluted to 10%, pump into the 3rd black liquor extraction equipment then, carry out press filtration, 10% choline of the rare black liquor of secondary that is leached returns rotary spherical digester, 69% returns from the paper pulp of first black liquor extraction equipment output as dilution, and remainder is back to from the paper pulp of second black liquor extraction equipment output as dilution;
5. with flushing with clean water the 3rd black liquor extraction equipment, used clear water enters in the slurries, is used for dilution;
6. the paper pulp that the 3rd black liquor extraction equipment is exported is after being diluted to 4～5%, be delivered to wash engine, the three grades of rare black liquor 5% that wash out are back to from the paper pulp of second black liquor extraction equipment output as dilution, and remainder is delivered to from the paper pulp of the 3rd black liquor extraction equipment output as dilution;
7. use the flushing with clean water wash engine, its water exports subsequent processing to paper pulp.
The oblique net filtration device that the method for papermaking straw pulp sewage disposal of the present invention is used, wherein in a stock tank, be provided with screen pack, top at described stock tank is provided with the tank of taking the mouth of a river out of along its both sides at least, described tank has certain drop, screen pack 1 is two in the present embodiment, one end of each screen pack is located at the delivery port place, and the other end connects by connecting plate at an angle to each otherly, and the bottom of stock tank is provided with water discharge outlet.
The method of papermaking straw pulp sewage disposal of the present invention, wherein cod (the chemical oxygen consumption (COC))＜2000mg/t amount by waste water is to calculate 8000 cubes/every day, flocculant (compound aluminium chloride) is that 1.2t/d flocculation aid (polyacrylamide) is 12kg/d.
Advantage of the present invention and good effect are, black liquid recovery rate height, and middle section water improvement investment is little, and whole technical process operating cost is low, administers thoroughly, can reach the stably reaching standard discharging.
Other details of the present invention and characteristics can be cheer and bright by reading the embodiment hereinafter encyclopaedize with reference to accompanying drawing.
Description of drawings
Fig. 1 is the block diagram of papermaking straw pulp sewage water treatment method black liquid extraction process of the present invention;
Fig. 2 is the block diagram that papermaking straw pulp sewage water treatment method middle section water of the present invention is handled;
Fig. 3 is the partial top view of oblique net filtration device in the papermaking straw pulp sewage water treatment method of the present invention;
Fig. 4 is the A-A cutaway view among Fig. 3.
The specific embodiment
The method of papermaking straw pulp sewage disposal of the present invention comprises the steps:
1. the papermaking straw pulp raw material is sent in the rotary spherical digester, in spherical digester, added the sodium sulfite that accounts for straw pulp weight 13～15%, account for the formaldehyde and the anthraquinone that accounts for straw pulp weight 0.03～0.05% of straw pulp weight 1.3～1.4%, they are mixed, and be heated to 160～175 ℃, and reacted 3 hours, make magma;
2. three processes of described magma extrusion equipment extracts black liquor;
To be diluted to 8～9% from the magma of rotary spherical digester ejection, and behind pulp screen, send into first black liquor extraction equipment and push, the concentrated black liquid 50-60% that extrudes sends to drying, and remainder is back to and is used for dilution in the magma;
Slurries from first black liquor extraction equipment are diluted to 8～9%, pump into second black liquor extraction equipment then, carry out press filtration, the 80-90% choline of the rare black liquor of one-level that is leached returns rotary spherical digester, and remainder is sent to drying;
With flushing with clean water second black liquor extraction equipment, used clear water enters in the slurries, is used for dilution;
Slurries from second black liquor extraction equipment are diluted to 10%, pump into the 3rd black liquor extraction equipment then, carry out press filtration, 10% part choline of the rare black liquor of secondary that is leached returns rotary spherical digester, 60% returns from the paper pulp of first black liquor extraction equipment output as dilution, and remainder is back to from the paper pulp of second black liquor extraction equipment output as dilution;
With flushing with clean water the 3rd black liquor extraction equipment, used clear water enters in the slurries, is used for dilution;
With the paper pulp of the 3rd black liquor extraction equipment output after being diluted to 4～5%, be delivered to wash engine, the three grades of rare black liquor 5% that wash out are back to from the paper pulp of second black liquor extraction equipment output as dilution, and remainder is delivered to from the paper pulp of the 3rd black liquor extraction equipment output as dilution
Use the flushing with clean water wash engine, its water exports subsequent processing to paper pulp;
3. the magma of having extracted black liquor is sent into pulping process and is carried out slurrying, and the plain boiled water of its output is by an oblique net filtration device collection paper pulp fiber, and the plain boiled water of filtering enters a collecting tank;
4. in collecting tank, add flocculant, pump into the super efficiency shallow air flotation device, carry out aeration simultaneously and add flocculation aid by pump; Cod (chemical oxygen consumption (COC))＜2000mg/t amount by waste water is to calculate 8000 cubes/every day, and compound aluminium chloride (flocculant) is that 1.2 tons of/day polyacrylamides (flocculation aid) are 12 kg/day;
5. the scum silica frost collected of super efficiency shallow air flotation device, described scum silica frost stirs through paper pulp concentration basin, paper pulp pond and enters sludge-tank, and last clear water can directly discharge or reuse.
Oblique net filtration device such as Fig. 3 that the method for papermaking straw pulp sewage disposal of the present invention is used, shown in 4, in a stock tank 1, be provided with screen pack 2, top at described stock tank 1 is provided with the tank 4 of taking the mouth of a river 3 out of at least along its both sides, described tank 4 has certain drop, and screen pack 2 is two in the present embodiment, and an end of each screen pack 2 is located at 3 mouthfuls of places of water outlet, the other end connects by connecting plate 5 at an angle to each otherly, and the bottom of stock tank 1 is provided with water discharge outlet 6.
Be promoted in the tank 4 with the plain boiled water of motor (not shown) input, plain boiled water is when flowing around tank 4, flow to screen pack 2 filtration of getting on from the apopore 3 of tank 4 inboards, filter the treatment process that the drainage 6 of back from 2 times stock tanks 1 of screen pack flows into the road, back.The paper pulp that leaches is collected by the workman who stands on the filter screen middle connecting plate 5.
Claims (5)
1. the method for a papermaking straw pulp sewage disposal comprises the steps:
1. the papermaking straw pulp raw material is sent into boiling in the rotary spherical digester, make magma;
2. described magma is extracted black liquor through three extrusion equipments;
3. the magma of having extracted black liquor is sent into pulping process and is carried out slurrying, and the plain boiled water of its output is by an oblique net filtration device collection paper pulp fiber, and the plain boiled water of filtering enters a collecting tank;
4. in collecting tank, add flocculant, pump into the super efficiency shallow air flotation device, carry out aeration simultaneously and add flocculation aid by pump;
5. the scum silica frost collected of super efficiency shallow air flotation device, described scum silica frost stirs through paper pulp concentration basin, paper pulp pond and enters sludge-tank, and last clear water can directly discharge or reuse.
2. the method for papermaking straw pulp sewage disposal according to claim 1, wherein 1. in spherical digester, add the sodium sulfite that accounts for straw pulp weight 13～15% in the step the, account for the formaldehyde and the anthraquinone that accounts for straw pulp weight 0.03～0.05% of straw pulp weight 1.3～1.4%, they are mixed, and be heated to 160～175 ℃, reacted 3 hours.
3. 2. the method for papermaking straw pulp sewage disposal according to claim 1 and 2 wherein comprises the steps: in the step
(1) will be diluted to 8～9% from the magma of rotary spherical digester ejection, and behind pulp screen, send into first black liquor extraction equipment and push, a concentrated black liquid part of extruding is sent to drying, and another part is back to and is used for dilution in the magma;
(2) slurries from first black liquor extraction equipment are diluted to 8～9%, pump into second black liquor extraction equipment then, carry out press filtration, a part of choline of the rare black liquor of one-level that is leached returns rotary spherical digester, and another part is sent to drying;
(3) with flushing with clean water second black liquor extraction equipment, used clear water enters in the slurries, is used for dilution;
(4) slurries from second black liquor extraction equipment are diluted to 10%, pump into the 3rd black liquor extraction equipment then, carry out press filtration, first's choline of the rare black liquor of secondary that is leached returns rotary spherical digester, second portion returns from the paper pulp of first black liquor extraction equipment output as dilution, and third part is back to from the paper pulp of second black liquor extraction equipment output as dilution;
(5) with flushing with clean water the 3rd black liquor extraction equipment, used clear water enters in the slurries, is used for dilution;
(6) paper pulp that the 3rd black liquor extraction equipment is exported is after being diluted to 4～5%, be delivered to wash engine, three grades of rare black liquor parts that wash out are back to from the paper pulp of second black liquor extraction equipment output as dilution, and another part is delivered to from the paper pulp of the 3rd black liquor extraction equipment output as dilution;
(7) use the flushing with clean water wash engine, its water exports subsequent processing to paper pulp.
4. the method for papermaking straw pulp sewage disposal according to claim 3, wherein COD (the chemical oxygen consumption (COC))＜2000mg/t amount by waste water is to calculate 8000 cubes/every day, and flocculant (compound aluminium chloride) is that 1.2 tons of/day flocculation aids (polyacrylamide) are 12 kg/day.
5. the used oblique net filtration device of the method for a papermaking straw pulp sewage disposal, it is characterized in that in a stock tank, being provided with screen pack, top at described stock tank is provided with the tank of taking the mouth of a river out of along its both sides at least, described tank has certain drop, screen pack 1 is two in the present embodiment, one end of each screen pack is located at the delivery port place, and the other end connects by connecting plate at an angle to each otherly, and the bottom of stock tank is provided with water discharge outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02100662 CN1203231C (en) | 2002-02-10 | 2002-02-10 | Waste-liquid treatment method for straw pulp paper-making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02100662 CN1203231C (en) | 2002-02-10 | 2002-02-10 | Waste-liquid treatment method for straw pulp paper-making |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1438385A true CN1438385A (en) | 2003-08-27 |
| CN1203231C CN1203231C (en) | 2005-05-25 |
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ID=27672068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02100662 Expired - Fee Related CN1203231C (en) | 2002-02-10 | 2002-02-10 | Waste-liquid treatment method for straw pulp paper-making |
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| Country | Link |
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| CN (1) | CN1203231C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102306A (en) * | 2010-12-10 | 2011-06-22 | 中顺洁柔纸业股份有限公司 | A papermaking system white water reuse process |
| CN106045215A (en) * | 2016-07-15 | 2016-10-26 | 东莞顺裕纸业有限公司 | Biochemical pretreatment technology of high-hardness and high-salinity papermaking wastewater |
| CN111018159A (en) * | 2019-12-27 | 2020-04-17 | 永发（江苏）模塑包装科技有限公司 | Method for removing paper fiber from waste water of paper pulp molding production |
| WO2020264311A1 (en) * | 2019-06-28 | 2020-12-30 | Sustainable Fiber Technologies, LLC | Method and apparatus for treating lignocellulosic material |
| US11033867B2 (en) | 2017-09-27 | 2021-06-15 | Sustainable Fiber Technologies, LLC | Aqueous lignin and hemicellulose dispersion |
| US11066588B2 (en) | 2017-11-21 | 2021-07-20 | Sustainable Fiber Technologies, LLC | Deicing composition comprising lignocellulosic byproducts |
| US11091697B2 (en) | 2017-11-29 | 2021-08-17 | Sustainable Fiber Technologies, LLC | Dust suppressant and soil stabilization composition comprising lignocellulosic byproducts |
| US11572474B2 (en) | 2020-05-22 | 2023-02-07 | Sustainable Fiber Technologies, LLC | Compositions comprising lignocellulosic byproducts for tire ballasts and associated methods |
-
2002
- 2002-02-10 CN CN 02100662 patent/CN1203231C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102306A (en) * | 2010-12-10 | 2011-06-22 | 中顺洁柔纸业股份有限公司 | A papermaking system white water reuse process |
| CN106045215A (en) * | 2016-07-15 | 2016-10-26 | 东莞顺裕纸业有限公司 | Biochemical pretreatment technology of high-hardness and high-salinity papermaking wastewater |
| US11033867B2 (en) | 2017-09-27 | 2021-06-15 | Sustainable Fiber Technologies, LLC | Aqueous lignin and hemicellulose dispersion |
| US11066588B2 (en) | 2017-11-21 | 2021-07-20 | Sustainable Fiber Technologies, LLC | Deicing composition comprising lignocellulosic byproducts |
| US11091697B2 (en) | 2017-11-29 | 2021-08-17 | Sustainable Fiber Technologies, LLC | Dust suppressant and soil stabilization composition comprising lignocellulosic byproducts |
| WO2020264311A1 (en) * | 2019-06-28 | 2020-12-30 | Sustainable Fiber Technologies, LLC | Method and apparatus for treating lignocellulosic material |
| US12163283B2 (en) | 2019-06-28 | 2024-12-10 | Sustainable Fiber Technologies, LLC | Method and apparatus for treating lignocellulosic material |
| CN111018159A (en) * | 2019-12-27 | 2020-04-17 | 永发（江苏）模塑包装科技有限公司 | Method for removing paper fiber from waste water of paper pulp molding production |
| US11572474B2 (en) | 2020-05-22 | 2023-02-07 | Sustainable Fiber Technologies, LLC | Compositions comprising lignocellulosic byproducts for tire ballasts and associated methods |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1203231C (en) | 2005-05-25 |
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Granted publication date: 20050525 Termination date: 20120210 |