CN105986498A - Technological method for achieving zero discharge of alkaline pulping waste water containing sodium or potassium - Google Patents
Technological method for achieving zero discharge of alkaline pulping waste water containing sodium or potassium Download PDFInfo
- Publication number
- CN105986498A CN105986498A CN201510089767.0A CN201510089767A CN105986498A CN 105986498 A CN105986498 A CN 105986498A CN 201510089767 A CN201510089767 A CN 201510089767A CN 105986498 A CN105986498 A CN 105986498A
- Authority
- CN
- China
- Prior art keywords
- waste water
- potassium
- water
- pulp
- ion
- 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
Landscapes
- Paper (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Provided is a technological method for achieving zero discharge of alkaline pulping waste water containing sodium or potassium. The method comprises the steps that paper making raw materials are treated with an alkaline chemical agent containing sodium or potassium at least once, the treated paper making raw materials are washed, and then a waste water treatment process capable of converting organic compounds containing sodium or potassium or inorganic compounds in pulp washing waste water into corresponding bicarbonates or carbonates or sulfates is conducted on the pulp washing waste water at least once. The method is characterized in that at least one part of the treated waste water is used for pulp washing, CaO or Ca(OH)2 is at least added to the other part of treated waste water or waste water, containing the components of the treated waste water, of other processes or pulp containing the components of the treated waste water for treatment, the dosage of CaO or Ca(OH)2 is determined according to the content of HCO3<-> ions in water, the treatment process meets the condition that the HCO3<-> ions and Ca<++> ions can be subjected to a chemical reaction, and the treated alkali-containing waste water is used for the pulping technological process.
Description
Technical field
The present invention relates to the technical field of pulp-making waste-water zero-emission, particularly relate to the process of a kind of alkaline pulp-making wastewater zero discharge containing sodium or potassium.
Prior art
Containing sodium or the definition of the alkaline pulp-making of potassium: refer to that the chemical agent system that at least one chemical treating process in pulping process is configured uses and only contain
Sodium or the alkali of potassium or sodium or the salt of weak acid of potassium.Such as NaOH, KOH or sodium sulfite, potassium sulfite or sodium sulfide, Potassium monosulfide. etc..
The sodium in waste water or the organic compound of potassium or inorganic compound can be made to be converted into the useless water-treated of its bicarbonate or carbonate or sulfate
Journey refers to: the aerobic treatment process of (1) waste water: during the aerobic treatment of waste water the organic the moon in the organic compound of sodium or potassium from
Son can be converted into carbon dioxide and water, carbon dioxide and water and together with sodium ion or potassium ion or directly react generation carbonic acid with sodium hydroxide or potassium hydroxide
Hydrogen sodium or potassium bicarbonate；(2) the anaerobic biochemical treatment process of waste water: organic anion can become raw methane and a small amount of during anaerobic biochemical treatment
Carbon dioxide, produces the mechanism of bicarbonate ibid；(3) by the lignin acidizing separation process of sulfuric acid treatment waste water: during sulphuric acid lignin acidizing separation, sulphuric acid
Root generates sodium sulfate or potassium sulfate together with sodium ion or potassium ion；(4) by the lignin acidizing separation process of carbon dioxide treatment waste water: carbon dioxide is together with water
Sodium nak response in solution generates sodium bicarbonate or potassium bicarbonate.
Existing slurry kind has chemical pulp, semi-chemical pulp, reducing rules, mechanical pulp, recycled pulp etc. five slurry kind.Brown stock (this can be divided into again with starching kind
Mill base) and bleached pulp two kinds, i.e. have ten slurries kind.In above ten slurries kind, except not floating mechanical pulp and not floating two kinds of being not related to of slurry of recycled pulp
Outside process, remaining eight slurries kind all refer to the different chemical treating process of slurry degree (containing Chemical Pretreatment process).Cooking section is to change
Generally refer to digestion process for learning slurry and semi-chemical pulp, for reducing rules, generally refer to the Chemical Pretreatment process of paper making raw material.
Chemical agent used by digestion process of a great variety, mainly has alkaline process, acid system and neutral and alkali sulfite process.Involved by this technology
The alkaline pulp-making containing sodium or potassium cooking section refer to the various alkaline cooking containing sodium or potassium and alkalescence and neutral sulrfite cooking.
Chemical agent used by bleaching process is also of a great variety, and the method for bleaching that this technology relates to refers to the various alkalescence chlorine-free bleachings containing sodium or potassium
Method, certainly, adds a small amount of ClO2The method for bleaching of drift agent is also within the scope of this technical protection.
Waste water produced by existing digestion process and bleaching process cannot accomplish complete-reclaiming after conventional process, and must be certain to environmental emission
The waste water of amount.Because tradition method for treating water cannot solve the accumulation problem of harmful inorganic anion.Chinese invention patent be " a kind of wastewater zero discharge
Pulping process ", Patent No. " 200910216872.0 ", simply solve and replace sodium hydroxide to be produced to carry out hydrogen peroxide bleaching with magnesium hydroxide
The process of waste water and complete-reclaiming problem, do not solve to be most widely used processes and reuse problem containing sodium or containing potassium pulp-making waste-water.Another tradition
The water treatment procedure of method for treating water be substantially a process not producing economic benefit.Solve the most effective solution of alkaline pulping black liquor pollution problem
Certainly scheme alkali collection, the most only solves the pollution problem of black liquor and produces the economic benefit of alkali collection, but chemical recovery system one is investment
Huge, two is the pollution problem that cannot solve middle section water (bleaching effluent).
Goal of the invention
Solving the alkaline pulp-making waste water containing sodium or potassium can not the difficult problem of fully recovering and the pulping process method of recyclable part alkali liquor.
Involved by the technical program is a kind of method of alkaline pulp-making wastewater zero discharge containing sodium or potassium.
Certainly, the preprocessing process of pulping process and the various enzyme of bleaching process or biological bacteria is also in the range of this technical protection.
In like manner, the various modifying agent that can not accumulate harmful ion in systems of all introducings in slurrying and bleaching process, also at the protection domain of this technology
Within.
In like manner, in slurrying and bleaching process all introducings can accumulate in systems and also harmful but can chemically remove containing inorganic hazardous ion
Modifying agent, also within the scope of this technical protection.
In like manner, during the various Organic substance that all introducings are biodegradable in slurrying and bleaching process, also within the protection domain of this technology.
In like manner, various can build up in systems and harmful less auxiliary agent of consumption also can not removed addition also this technology protection domain it
In, as added a small amount of aluminium polychlorid etc. in water treatment procedure, the use etc. of a small amount of chlorine-containing agent in bleaching process.
The technical scheme of this technology is achieved in that the process of a kind of alkaline pulp-making wastewater zero discharge containing sodium or potassium, with containing sodium or potassium
Paper making raw material after processing at least one times, is washed by alkali electroless chemicals treatment paper making raw material, and produced waste wash liquor is through at least one times
Sodium therein or the organic compound of potassium or inorganic compound can be made to be converted into the wastewater treatment process of its bicarbonate or carbonate or sulfate.It is special
Levy is that the waste water after processing is at least partially for slurry washing.At least to the waste water after another part process or to other mistake containing this waste water composition
Journey waste water or to containing this waste water composition paper pulp add CaO or Ca (OH)2Process, CaO or Ca (OH)2Consumption according to HCO in water3 -
The content of ion determines, the condition of process is so that HCO3 -Ion and Ca++Ion generation chemical reaction is standard, will above process after containing alkali waste water
For pulp preparing process.
Improve as one, be the waste water after at least another part being processed or to other spent process water containing this waste water composition or to useless containing this
The paper pulp of water composition adds CaO or Ca (OH)2With Ba (OH)2Process, CaO or Ca (OH)2Consumption according to HCO in water3 -Content true
Fixed, the consumption of barium hydroxide is according to SO in water4 =The content of ion determines, the condition of process is so that HCO3 -Ion and Ca++Ion and Ba++Ion and
SO4 =Ion generation chemical reaction is standard, will above process after be used for pulp preparing process containing alkali waste water.
Improve as one, be CaO or Ca (OH)2With Ba (OH)2Consumption at least Ba (OH)2Consumption relative to SO4 =The amount phase of ion
To deficiency, to prevent from producing retention Ba (OH) in systems2With Ca (OH)2。
Improve as one, be when adding described water treatment agent in waste water, the precipitate produced be separated in chemical reaction process,
After sediment separate out containing alkali clear water for pulp preparing process.
CaO or Ca (OH) in above technical scheme2Consumption according to producing NaHCO in waste water during biochemical treatment3Content determine, reaction
Equation is as follows:
CaO+H2O=Ca (OH)2
Ca(OH)2+NaHCO3=CaCO3↓+NaOH+H2O
Ba(OH)2Consumption according to SO in waste water4 =The content of ion determines, reaction equation is as follows:
Ba(OH)2+Na2SO4=BaSO4↓+2NaOH
Embodiment:
1, plant fiber material get the raw materials ready → the alkalescence bleaching → drift of alkaline cooking → extraction black liquor containing sodium or potassium → containing sodium or potassium after wash.
Wash the middle section water of generation after drift to go to extract black liquor, the black liquor of extraction process by the following method after reuse.
Anaerobic treatment → aerobic treatment → add FeSO4And H2O2Carry out oxidative decoloration process.Waste water scheme one after process be fully recovering in
Pulp washing after slurrying drift.The stage casing plain boiled water major part that after drift, pulp washing produces goes to extract black liquor, and small part is according to the content of the alkali acid hydrogen radical ion in water first
Add CaO so that it is in NaHCO3Become CaCO3Precipitation and NaOH, the content further according to the sulfate ion in water adds Ba (OH)2,
Make SO therein4 =Ion becomes BaSO4Precipitation and NaOH.So process after plain boiled water can with sediment separate out, can not also sediment separate out,
Because no matter BaSO4Or CaCO3The most harmless.Slurrying is carried out plus the outsourcing alkali supplemented with the plain boiled water after secondary causticization.Scheme two is that major part is returned
For pulping bleaching pulp washing, small part carries out slurrying plus the outsourcing alkali supplemented after carrying out secondary causticization by the above process.
2, paper making raw material is got the raw materials ready → is washed containing potassium or the alkaline bleaching containing sodium → bleaching.Wash after drift at the stage casing plain boiled water → aerobic biochemical of generation
Manage → add FeSO4And H2O2Carry out oxidative decoloration process.Waste water scheme one after process is fully recovering pulp washing after slurrying is floated.After drift, pulp washing produces
Raw stage casing plain boiled water major part goes to extract black liquor, and small part is firstly added CaO according to the content of the bicarbonate ion in water so that it is in NaHCO3
Become CaCO3Precipitation and NaOH, the content further according to the sulfate ion in water adds Ba (OH)2SO in so that it is4 =Ion becomes BaSO4
Precipitation and NaOH.Plain boiled water after so processing can with sediment separate out, can not also sediment separate out because no matter BaSO4Or CaCO3
The most harmless.Slurrying is carried out plus the outsourcing alkali supplemented with the plain boiled water after secondary causticization.Scheme two is that major part is back to pulping bleaching pulp washing, small part
Slurrying is carried out plus the outsourcing alkali supplemented after carrying out secondary causticization by the above process.
3, plant fiber material get the raw materials ready → the alkalescence bleaching → drift of alkaline cooking → extraction black liquor containing sodium or potassium → containing sodium or potassium after wash.
The black liquor CO extracted2Lignin by acid separation, enters anaerobism → aerobic → Fenton process afterwards and (i.e. adds FeSO4And H2O2Oxidative decoloration).Process
After waste water scheme one pulp washing that is fully recovering after slurrying is floated.The stage casing plain boiled water major part that after drift, pulp washing produces goes to extract black liquor, and small part is according to water
In the content of bicarbonate ion be firstly added CaO so that it is in NaHCO3Become CaCO3Precipitation and NaOH, further according to the sulphuric acid in water
The content of radical ion adds Ba (OH)2SO in so that it is4 =Ion becomes BaSO4Precipitation and NaOH.It is heavy that plain boiled water after so processing can separate
Shallow lake thing, can not also sediment separate out because no matter BaSO4Or CaCO3The most harmless.With the plain boiled water after secondary causticization plus the outsourcing alkali supplemented
Carry out slurrying.Scheme two is that major part is back to pulping bleaching pulp washing, and small part is entered plus the outsourcing alkali supplemented after carrying out secondary causticization by the above process
Row slurrying.
4, plant fiber material is got the raw materials ready → alkaline cooking → extraction black liquor containing sodium or potassium.
Black liquor → anaerobic treatment → the aerobic biochemical extracted.A part of waste water after process is used for extracting black liquor, and a part adds CaO or Ca (OH)2
Processing, the water after process is completely used for joining alkali.
5, plant fiber material is got the raw materials ready → alkaline cooking → extraction black liquor containing sodium or potassium.
Black liquor → anaerobic treatment → the aerobic biochemical extracted.Whole waste water after process are used for extracting black liquor, make according to after enzyme pretreatment in boiling vessel
The content of the bicarbonate ion in waste water in paper material is directly added into calcium oxide or calcium hydroxide and supplementary Caustic soda carries out steaming and decocting.
The basic treatment condition containing sodium or potassium of the paper making raw material of the waste water related in above example, the alkaline conditions of bleaching containing sodium or potassium, biology
Treatment conditions, lignin acidizing separation condition and the anaerobic treatment of waste water and Aerobic Process for Treatment and FeSO thereof4Add H2O2Oxidative decoloration process (also known as Fenton
Method) process conditions all belong to prior art, needn't elaborate any further at this.
CaO or Ca (OH) related in above example2With Ba (OH)2Consumption computational methods be also there is the people of elementary chemical knowledge just can be light
Easily calculate, also needn't elaborate any further at this.
Claims (4)
1., containing sodium or a process for the alkaline pulp-making wastewater zero discharge of potassium, it is former with the alkali electroless chemicals treatment papermaking containing sodium or potassium
Paper making raw material after processing at least one times, is washed by material, produced waste wash liquor through at least one times can make the organic of sodium therein or potassium
Change platform thing or inorganic compound are converted into the wastewater treatment process of its bicarbonate or carbonate or sulfate.It is characterized in that the waste water at least one after processing
Part is for slurry washing.At least to the waste water after another part process or to other spent process water containing this waste water composition or become containing this waste water
The paper pulp of part adds CaO or Ca (OH)2Process, CaO or Ca (OH)2Consumption according to HCO in water3 -The content of ion determines, process
Condition is so that HCO3 -Ion and Ca++Ion generation chemical reaction is standard, will above process after be used for pulp preparing process containing alkali waste water.
The process of a kind of alkaline pulp-making wastewater zero discharge containing sodium or potassium the most according to claim 1, it is characterised in that the most right
Another part process after waste water or to other spent process water containing this waste water composition or to containing this waste water composition paper pulp add CaO or
Ca(OH)2With Ba (OH)2Process, CaO or Ca (OH)2Consumption according to HCO in water3 -Content determine, the consumption of barium hydroxide according to
SO in water4 =The content of ion determines, the condition of process is so that HCO3 -Ion and Ca++Ion and Ba++Ion and SO4 =Ion generation chemical reaction
For standard, after processing above, it is used for pulp preparing process containing alkali waste water.
3. according to the process of a kind of alkaline pulp-making wastewater zero discharge containing sodium or potassium described in claim 1 and 2, it is characterised in that
CaC or Ca (OH)2With Ba (OH)2Consumption at least Ba (OH)2Consumption relative to SO4 =The amount relative deficiency of ion, to prevent from producing in systems
Raw retention Ba (OH)2With Ca (OH)2。
4. according to the process of a kind of alkaline pulp-making wastewater zero discharge containing sodium or potassium described in claim 1 and 2, it is characterised in that when
When adding described water treatment agent in waste water, in chemical reaction process produce precipitate separate, after sediment separate out containing alkali clear water
For pulp preparing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510089767.0A CN105986498A (en) | 2015-02-16 | 2015-02-16 | Technological method for achieving zero discharge of alkaline pulping waste water containing sodium or potassium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510089767.0A CN105986498A (en) | 2015-02-16 | 2015-02-16 | Technological method for achieving zero discharge of alkaline pulping waste water containing sodium or potassium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105986498A true CN105986498A (en) | 2016-10-05 |
Family
ID=57037867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510089767.0A Pending CN105986498A (en) | 2015-02-16 | 2015-02-16 | Technological method for achieving zero discharge of alkaline pulping waste water containing sodium or potassium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105986498A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107188380A (en) * | 2017-07-24 | 2017-09-22 | 轻工业环境保护研究所 | Reducing rules waste water calcium salt facture |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068613A (en) * | 1992-04-19 | 1993-02-03 | 漳州师范学院 | Generated by paper alkali pulping black liquor and white liquid improvement method |
| CN1167853A (en) * | 1996-06-06 | 1997-12-17 | 盛利元 | Patash-black liquor recovery pulping method |
| CN101037281A (en) * | 2007-04-27 | 2007-09-19 | 程昔煊 | Zero-discharging treatment method of regenerated waste water for paper making |
| CN101597871A (en) * | 2009-06-25 | 2009-12-09 | 西安通润生化科技有限公司 | Integrated paper pulping bleaching and process for purifying waste water |
| CN102108650A (en) * | 2009-12-29 | 2011-06-29 | 李�昊 | Zero-wastewater-emission pulping method |
-
2015
- 2015-02-16 CN CN201510089767.0A patent/CN105986498A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068613A (en) * | 1992-04-19 | 1993-02-03 | 漳州师范学院 | Generated by paper alkali pulping black liquor and white liquid improvement method |
| CN1167853A (en) * | 1996-06-06 | 1997-12-17 | 盛利元 | Patash-black liquor recovery pulping method |
| CN101037281A (en) * | 2007-04-27 | 2007-09-19 | 程昔煊 | Zero-discharging treatment method of regenerated waste water for paper making |
| CN101597871A (en) * | 2009-06-25 | 2009-12-09 | 西安通润生化科技有限公司 | Integrated paper pulping bleaching and process for purifying waste water |
| CN102108650A (en) * | 2009-12-29 | 2011-06-29 | 李�昊 | Zero-wastewater-emission pulping method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107188380A (en) * | 2017-07-24 | 2017-09-22 | 轻工业环境保护研究所 | Reducing rules waste water calcium salt facture |
| CN107188380B (en) * | 2017-07-24 | 2021-01-26 | 轻工业环境保护研究所 | Calcium salt treatment method for chemical-mechanical pulp wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Cabrera | Pulp mill wastewater: characteristics and treatment | |
| CN102452672B (en) | Method for recycling sodium sulfate from waste alkali liquor of ethylene unit | |
| NO132361B (en) | ||
| US5770010A (en) | Pulping process employing nascent oxygen | |
| AU619580B2 (en) | Elimination of bleach effluents | |
| CN105986498A (en) | Technological method for achieving zero discharge of alkaline pulping waste water containing sodium or potassium | |
| FI64408B (en) | SAETT VIDEO UPPSLUTNING AV CELLULOSAHALTIGT MATERIAL | |
| EP2025807A1 (en) | Method to recover chemicals in mechanical pulping | |
| RU2636560C2 (en) | Method and device for processing liquid flows on pulp mill | |
| CN104169493A (en) | A method and a system for treating liquid flows at a chemical pulp mill | |
| US4005060A (en) | Method, applied in the production of tall oil, of preventing or reducing the emission of odorous sulphur compounds and/or acid sulphur combustion products from the black liquor recovery process in alkaline pulping | |
| US20230272581A1 (en) | Methods of treating a kraft process recovery cycle to reduce metal levels at the kraft process | |
| CN102452674A (en) | Processing method for recycling sodium sulfate from waste alkali liquor in ethylene unit | |
| CA1064206A (en) | Method of recovering substances in the extraction of spent liquors from the delignification of lignocellulosic material by means of chloride-producing bleaching agents | |
| CN103061185A (en) | Chloride-free bleaching method for paper pulp | |
| CN102452673B (en) | Recovery processing method of waste alkaline liquor in ethylene plant | |
| EP3126298B1 (en) | Method for reducing phosphorus in effluent or filtrate | |
| CN104727174A (en) | Novel black liquor-free clean bamboo pulp production process with smart washing | |
| CA1043516A (en) | Method for producing oxidized white liquor | |
| Kilpi | Reduction of sulfate emissions in bleached softwood kraft pulp mill | |
| CN106830552B (en) | Wet alkali recovery method for chemical pulp black liquor | |
| AU2663192A (en) | Ozone bleaching of pulp | |
| US20190112759A1 (en) | Selective removal of k+ and cl- from recovery boiler electrostatic precipitator ashes in a kraft process | |
| CN105040500A (en) | Elemental chlorine free bleaching method of reed pulp | |
| CN109322202A (en) | A kind of new low concentration black liquor alkali by virtue |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20181220 Address after: 518116 Xuegang Road, Bantian Street, Longgang District, Shenzhen City, Guangdong Province, 2018 Tian'an Yungu Phase 1 Block B 1F Applicant after: Shenzhen De Wei fiber environmental protection technology Co., Ltd. Address before: 262218 Shandong Huixiang Patent Paper Machinery Co., Ltd. No. 38 Xingzhong Road, Xinxing Town, Zhucheng City, Shandong Province Applicant before: Li Hao |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161005 |