CN114804538A - Sludge recycling process of primary sedimentation tank for manufacturing bobbin paper - Google Patents
Sludge recycling process of primary sedimentation tank for manufacturing bobbin paper Download PDFInfo
- Publication number
- CN114804538A CN114804538A CN202210552334.4A CN202210552334A CN114804538A CN 114804538 A CN114804538 A CN 114804538A CN 202210552334 A CN202210552334 A CN 202210552334A CN 114804538 A CN114804538 A CN 114804538A
- Authority
- CN
- China
- Prior art keywords
- sludge
- sedimentation tank
- recycling
- primary sedimentation
- bobbin paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 48
- 238000004062 sedimentation Methods 0.000 title claims abstract description 45
- 238000004064 recycling Methods 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 27
- 239000002244 precipitate Substances 0.000 claims abstract description 17
- 125000002091 cationic group Chemical group 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000005189 flocculation Methods 0.000 claims abstract description 11
- 230000016615 flocculation Effects 0.000 claims abstract description 11
- 238000001556 precipitation Methods 0.000 claims abstract description 11
- 239000000047 product Substances 0.000 claims abstract description 11
- 239000002351 wastewater Substances 0.000 claims abstract description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 7
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 7
- 239000012716 precipitator Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 10
- 239000002028 Biomass Substances 0.000 claims description 5
- 229920001131 Pulp (paper) Polymers 0.000 claims description 5
- 241001148470 aerobic bacillus Species 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 abstract description 17
- 125000000129 anionic group Chemical group 0.000 abstract description 12
- 230000014759 maintenance of location Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000003311 flocculating effect Effects 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000004826 Synthetic adhesive Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000000227 bioadhesive Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
Abstract
The invention discloses a sludge recycling process of a primary sedimentation tank for manufacturing bobbin paper, which specifically comprises the following steps: (1) separating the precipitate; (2) treating the precipitate; (3) aerobic biochemical treatment; (4) chemical flocculation precipitation; (5) filtering; (6) and (4) recycling. The invention relates to the technical field of recycling sludge in a papermaking sedimentation tank, and particularly provides a sludge recycling process of a primary sedimentation tank for manufacturing bobbin paper, wherein fine fibers and sludge in the primary sedimentation tank are flocculated by chemical products (polyaluminium chloride, cationic polyacrylamide and the like) to form a bridging group with cationic charges on the surface, and the bridging group can neutralize anionic garbage in papermaking wastewater and can be combined with anionic fibers to improve retention rate; the recovered sludge is beneficial to clean operation of a papermaking system, and meanwhile, the product quality is improved and the production cost is reduced.
Description
Technical Field
The invention relates to the technical field of sludge recycling of papermaking sedimentation tanks, in particular to a sludge recycling process of a primary sedimentation tank for manufacturing bobbin paper.
Background
In recent years, with the enhancement of environmental awareness of people, sludge in a settling pond for papermaking is often treated, recycled and reused for the purpose of protecting forest resources and saving energy. The components of paper sludge are complex and mainly consist of inorganic matters and organic matters. The inorganic matter mainly comes from fillers, coatings and most of ink particles in paper, and the main components of the inorganic matter are argil, calcium carbonate and talcum powder; the organic matter mainly comprises fine fiber, short fiber, coarse residue and organic matter in the ink, such as carbon black, natural or synthetic adhesive, etc. The fiber in the paper making sludge has high organic matter content, is mainly broken fine fiber, is a good raw material of paper products, and has high utilization value.
Because the water treatment primary sedimentation tank contains a large amount of fine fiber components and sludge, the direct reuse of the components can cause negative effects on the operation of a papermaking system and the product quality. Therefore, the scheme provides a sludge recycling process of a primary sedimentation tank for manufacturing bobbin paper.
Disclosure of Invention
Aiming at the situation, in order to make up for the existing defects, the invention provides the sludge recycling process of the primary sedimentation tank for manufacturing bobbin paper, which is not only beneficial to the clean operation of a papermaking system, but also can improve the product quality and reduce the production cost.
The invention provides the following technical scheme: the invention provides a sludge recycling process of a primary sedimentation tank for manufacturing bobbin paper, which specifically comprises the following steps:
(1) precipitation and separation: allowing sludge for manufacturing bobbin paper to enter a primary sedimentation tank for standing and sedimentation to realize primary layering of water and precipitated sludge;
(2) and (3) treating precipitates: pumping out the separated upper water body, and crushing the precipitated sludge by adopting a crushing device;
(3) aerobic biochemical treatment: carrying out aerobic biochemical treatment on the crushed sludge by adopting aerobic bacteria;
(4) chemical flocculation and precipitation: pumping the wastewater subjected to aerobic biochemical treatment into a secondary sedimentation tank, adding a chemical precipitator into the secondary sedimentation tank, wherein the chemical precipitator flocculates fine fibers and sludge in a primary sedimentation tank to form a bridging group with cationic charges on the surface, and the bridging group can neutralize anionic garbage in the papermaking wastewater and can be combined with anionic fibers to improve retention rate;
(5) and (3) filtering: filtering the flocculated precipitate, performing filter pressing through a filter press, and performing combustion treatment through a biomass boiler;
(6) and (3) recycling: and adding the product of removing the flocculation precipitate into paper pulp according to a certain proportion for papermaking recycling.
Further, the standing and precipitating time is 24-30 h.
Preferably, the treatment temperature of the aerobic biochemical treatment is 20-50 ℃, and the pH value is 6.0-8.5.
Further, the chemical precipitating agent is a chemical composition comprising polyaluminium chloride and cationic polyacrylamide.
The invention with the structure has the following beneficial effects: according to the recycling process of the sludge in the primary settling tank for manufacturing bobbin paper, fine fibers and the sludge in the primary settling tank are flocculated by chemicals (polyaluminium chloride, cationic polyacrylamide and the like) to form a bridging group with cationic charges on the surface, and the bridging group can neutralize anionic garbage in papermaking wastewater and can be combined with anionic fibers to improve retention rate; the recovered sludge is beneficial to clean operation of a papermaking system, and meanwhile, the product quality is improved and the production cost is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A sludge recycling process of a primary sedimentation tank for manufacturing bobbin paper specifically comprises the following steps:
(1) precipitation and separation: allowing sludge for manufacturing bobbin paper to enter a primary sedimentation tank for standing sedimentation to realize primary layering of water and precipitated sludge, wherein the standing sedimentation time is 24 hours;
(2) and (3) treating precipitates: pumping out the separated upper water body, and crushing the precipitated sludge by adopting a crushing device;
(3) aerobic biochemical treatment: performing aerobic biochemical treatment on the crushed sludge by adopting aerobic bacteria, wherein the treatment temperature of the aerobic biochemical treatment is 20-50 ℃, and the pH value is 6.0-8.5;
(4) chemical flocculation and precipitation: pumping the wastewater subjected to aerobic biochemical treatment into a secondary sedimentation tank, adding a chemical precipitator into the secondary sedimentation tank, wherein the chemical precipitator is a chemical composition comprising polyaluminium chloride and cationic polyacrylamide, flocculating fine fibers and sludge in the primary sedimentation tank by using the chemical precipitator to form a bridging group with cationic charges on the surface, and the bridging group can neutralize anionic garbage in the papermaking wastewater and can be combined with anionic fibers to improve retention rate;
(5) and (3) filtering: filtering the flocculated precipitate, performing filter pressing through a filter press, and performing combustion treatment through a biomass boiler;
(6) and (3) recycling: and adding the product of removing the flocculation precipitate into paper pulp according to a certain proportion for papermaking recycling.
Example 2
(1) Precipitation and separation: allowing sludge for manufacturing bobbin paper to enter a primary sedimentation tank for standing sedimentation to realize primary layering of water and precipitated sludge, wherein the standing sedimentation time is 27 h;
(2) and (3) treating precipitates: pumping out the separated upper water body, and crushing the precipitated sludge by adopting a crushing device;
(3) aerobic biochemical treatment: performing aerobic biochemical treatment on the crushed sludge by adopting aerobic bacteria, wherein the treatment temperature of the aerobic biochemical treatment is 20-50 ℃, and the pH value is 6.0-8.5;
(4) chemical flocculation and precipitation: pumping the wastewater subjected to aerobic biochemical treatment into a secondary sedimentation tank, adding a chemical precipitator into the secondary sedimentation tank, wherein the chemical precipitator is a chemical composition comprising polyaluminium chloride and cationic polyacrylamide, flocculating fine fibers and sludge in the primary sedimentation tank by using the chemical precipitator to form a bridging group with cationic charges on the surface, and the bridging group can neutralize anionic garbage in the papermaking wastewater and can be combined with anionic fibers to improve retention rate;
(5) and (3) filtering: filtering the flocculated precipitate, performing filter pressing through a filter press, and performing combustion treatment through a biomass boiler;
(6) and (3) recycling: and adding the product of removing the flocculation precipitate into paper pulp according to a certain proportion for papermaking recycling.
Example 3
(1) Precipitation and separation: allowing sludge for manufacturing bobbin paper to enter a primary sedimentation tank for standing sedimentation to realize primary layering of water and precipitated sludge, wherein the standing sedimentation time is 30 hours;
(2) and (3) treating precipitates: pumping out the separated upper water body, and crushing the precipitated sludge by adopting a crushing device;
(3) aerobic biochemical treatment: performing aerobic biochemical treatment on the crushed sludge by adopting aerobic bacteria, wherein the treatment temperature of the aerobic biochemical treatment is 20-50 ℃, and the pH value is 6.0-8.5;
(4) chemical flocculation and precipitation: pumping the wastewater subjected to aerobic biochemical treatment into a secondary sedimentation tank, adding a chemical precipitator into the secondary sedimentation tank, wherein the chemical precipitator is a chemical composition comprising polyaluminium chloride and cationic polyacrylamide, flocculating fine fibers and sludge in the primary sedimentation tank by using the chemical precipitator to form a bridging group with cationic charges on the surface, and the bridging group can neutralize anionic garbage in the papermaking wastewater and can be combined with anionic fibers to improve retention rate;
(5) and (3) filtering: filtering the flocculated precipitate, performing filter pressing through a filter press, and performing combustion treatment through a biomass boiler;
(6) and (3) recycling: and adding the product of removing the flocculation precipitate into paper pulp according to a certain proportion for papermaking recycling.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A sludge recycling process of a primary sedimentation tank for manufacturing bobbin paper is characterized by comprising the following steps:
(1) precipitation and separation: allowing sludge for manufacturing bobbin paper to enter a primary sedimentation tank for standing and sedimentation to realize primary layering of water and precipitated sludge;
(2) and (3) treatment of precipitates: pumping out the separated upper water body, and crushing the precipitated sludge by adopting a crushing device;
(3) aerobic biochemical treatment: carrying out aerobic biochemical treatment on the crushed sludge by adopting aerobic bacteria;
(4) chemical flocculation and precipitation: pumping the wastewater subjected to aerobic biochemical treatment into a secondary sedimentation tank, and adding a chemical precipitator into the secondary sedimentation tank;
(5) and (3) filtering: filtering the flocculated precipitate, performing filter pressing through a filter press, and performing combustion treatment through a biomass boiler;
(6) and (3) recycling: and adding the product of removing the flocculation precipitate into paper pulp according to a certain proportion for papermaking recycling.
2. The process for recycling sludge in a primary sedimentation tank for manufacturing bobbin paper as claimed in claim 1, wherein the standing sedimentation time is 24-30 h.
3. The process for recycling sludge in a primary sedimentation tank for manufacturing bobbin paper as claimed in claim 1, wherein the aerobic biochemical treatment is carried out at a treatment temperature of 20-50 ℃ and a pH value of 6.0-8.5.
4. The process for recycling sludge in a primary sedimentation tank for manufacturing bobbin paper as claimed in claim 1, wherein the chemical precipitator is a chemical composition comprising polyaluminium chloride and cationic polyacrylamide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210552334.4A CN114804538A (en) | 2022-05-19 | 2022-05-19 | Sludge recycling process of primary sedimentation tank for manufacturing bobbin paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210552334.4A CN114804538A (en) | 2022-05-19 | 2022-05-19 | Sludge recycling process of primary sedimentation tank for manufacturing bobbin paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114804538A true CN114804538A (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210552334.4A Pending CN114804538A (en) | 2022-05-19 | 2022-05-19 | Sludge recycling process of primary sedimentation tank for manufacturing bobbin paper |
Country Status (1)
| Country | Link |
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| CN (1) | CN114804538A (en) |
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2022
- 2022-05-19 CN CN202210552334.4A patent/CN114804538A/en active Pending
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Application publication date: 20220729 |