CN103397555B - A kind of bentone earth cooperation quick lime green liquor silicon removing method - Google Patents
A kind of bentone earth cooperation quick lime green liquor silicon removing method Download PDFInfo
- Publication number
- CN103397555B CN103397555B CN201310354168.8A CN201310354168A CN103397555B CN 103397555 B CN103397555 B CN 103397555B CN 201310354168 A CN201310354168 A CN 201310354168A CN 103397555 B CN103397555 B CN 103397555B
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- CN
- China
- Prior art keywords
- green liquor
- quick lime
- silica removal
- bentone
- removing method
- 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.)
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- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 239000000292 calcium oxide Substances 0.000 title claims abstract description 38
- 235000012255 calcium oxide Nutrition 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 27
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 25
- 239000010703 silicon Substances 0.000 title claims abstract description 25
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 title claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 36
- 238000005352 clarification Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 11
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 3
- 239000011575 calcium Substances 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 230000003647 oxidation Effects 0.000 claims abstract description 3
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 3
- 150000003839 salts Chemical class 0.000 claims abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 9
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 238000001914 filtration Methods 0.000 abstract description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 9
- 235000011941 Tilia x europaea Nutrition 0.000 description 9
- 239000004571 lime Substances 0.000 description 9
- 239000003513 alkali Substances 0.000 description 6
- 238000009993 causticizing Methods 0.000 description 5
- 239000003518 caustics Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000001354 calcination Methods 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910004762 CaSiO Inorganic materials 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 150000004645 aluminates Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- -1 aluminum ions Chemical class 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 229930013930 alkaloid Natural products 0.000 description 1
- 150000003797 alkaloid derivatives Chemical class 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- JYIMWRSJCRRYNK-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4] JYIMWRSJCRRYNK-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Landscapes
- Silicon Compounds (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A kind of bentone earth cooperation quick lime green liquor silicon removing method, comprise the following steps: 1) mixing of the quick lime (active oxidation calcium content 80%-90%) of trivalent metal salt modified alta-mud 10-40g and 5-20g is placed in the 1L green liquor after clarification, be heated to 90-100 DEG C, in silica removal groove, stir 10-30min; 2) proceed in hopper by mixed liquor, leave standstill and fully react 10-30min, the silica removal green liquor of filtration, its silica removal rate can reach 70%-95%; Adopt green liquor silica removal rate of the present invention high, and green liquor pH change little, improves Business Economic Benefit.
Description
Technical field
The invention belongs to pulp technology for making paper, particularly a kind of bentone earth cooperation quick lime green liquor silicon removing method.
Background technology
Non-wood-fiber paper making raw material is the resource of a kind of important renewable fiber of China.Due to the restriction of resource, China's present stage adopts non-wood material slurrying mostly, such as bamboo, wheat straw etc.Due to the cause specific of non-wood fibrous raw material self, hemicellulose level is higher than timber, and heteroproteose cell is many, and ash content is high, and silica accounts for ash content more than 60%, and result causes alkali recovery process " silicon obstacle " problem.It is mainly reflected in evaporation, the workshop sections such as causticization and lime recovery.At caustic room, in green liquor causticizing reaction, have CaSiO
3generate, reduce the causticizing efficiency of green liquor, in addition, generate lime at burning of lime sludge and be back in the process of caustic room, silicon in white clay can reduce Activity of Lime, in addition, the silicon in white clay can make residual base number in white clay higher, because residual alkaloid substance fusing point is lower than lime, can first melt before white clay carries out calcination reaction or in course of reaction, form block with lime or stick on the inwall of limekiln and form balling, ring formation and knot ring, result causes that limekiln is as easy as rolling off a log breaks down.These problems not only can make alkali recovery efficiency reduce above, and it is serious that papermaking wastewater process workshop section is consumed energy, and do not reach national requirements.So, a lot of solution is had for alleviating " silicon obstacle " problem, as carbon dioxide process, aluminate method and soda lime method etc., but all have some limitations, while making to eliminate " silicon obstacle " problem, face other problems again, when the siliceous colloid particle passing into carbon dioxide/flue gas generation in black liquor is very tiny, and be suspended in solution, be difficult to precipitation, meanwhile, CO is worked as
2when method green liquor silica removal rate is 85%, the burning of lime sludge that green liquor causticizing produces reclaims lime still can not reuse, and green liquor pH value is low after silica removal, need supplementary NaOH that green liquor pH is adjusted back to high alkalinity, although aluminate method silica removal rate is higher, aluminum ions introduction volume increases along with the increase of silica removal rate, and aluminum ions a large amount of existence makes green liquor pH reduce, and the sodium silicoaluminate colloid formed is difficult to go out from system, causes other problems.Quick lime method silica removal rate is not high enough, still has the CaSiO of generation at lime calcining recovery stage
3be difficult to calcining.
Quick lime is often used for causticizing green liquor in the middle of alkali recovery process, thus obtains white liquid and recycle.Due to the problem of silicon obstacle, often need a large amount of quick lime to carry out causticization, and the calcium carbonate after causticization is difficult to be sintered into calcium oxide in calcining furnace.In addition, quick lime also has the effectiveness of silica removal, the modified alta-mud that it is higher with silica removal rate combines, not only reduce cost, alleviate silicon obstacle problem, add the modified alta-mud rate of settling, again pre-causticization has been carried out to green liquor, decrease follow-up workshop section Lime-Injecting amount, for enterprise adds many-sided benefit.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of bentone earth cooperation quick lime green liquor silicon removing method, the object of the invention is to overcome above-mentioned existing silicon removing method green liquor silica removal rate not high, change green liquor pH, caustic room consumption of quicklime amount is excessive, provides bentone earth cooperation quick lime green liquor silicon removing method; This method bentone earth cooperation quick lime silica removal rate is high, add a certain amount of quick lime in the silica removal stage and carry out pre-causticization, both can modified synergic bentonite silica removal, reduce the consumption of modified alta-mud, the sinking speed of modified alta-mud can also be accelerated, the addition of caustic room quick lime can be reduced again; And green liquor pH changes very little, and green liquor amount does not reduce; No matter from desiliconizing agent use amount or from machine utilization, be all that enterprise brings benefit.
To achieve these goals, the technical solution used in the present invention is: a kind of bentone earth cooperation quick lime green liquor silicon removing method, comprises the following steps:
1) mixing of the quick lime (active oxidation calcium content 80%-90%) of trivalent metal salt modified alta-mud 10-40g and 5-20g is placed in the 1L green liquor after clarification, is heated to 90-100 DEG C, in silica removal groove, stirs 10-30min;
2) proceed in hopper by mixed liquor, leave standstill and fully react 10-30min, the silica removal green liquor of filtration, its silica removal rate can reach 70%-95%.
the invention has the beneficial effects as follows:
Compared with prior art, adopt silica removal of the present invention, silica removal rate is higher, and sinking speed is fast, easy filtration, does not dilute green liquor, and cost is low, not only alleviate " silicon obstacle " problem in causticizing reaction process, also reduce the quick lime consumption of caustic room, for enterprise adds certain benefit.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail.
What the present invention was used is from soda pulping process factory alkali collection workshop green liquor clarification groove, green liquor composition: total alkali 137.21g/l, active alkali 39.88g/l, Na
2cO
397.27g/l, Na
2s31.94g/l, SiO
24.36g/l, the pH of green liquor is 12.94.
embodiment 1
A kind of bentone earth cooperation quick lime green liquor silicon removing method, comprises the following steps:
1) insert in the causticization section green liquor 1L green liquor of clarification after modified alta-mud 10g and quick lime 20g being mixed, be heated to 100 DEG C, stirring reaction 10min;
2) leave standstill 10min, filter, the silica removal green liquor of filtration, its silica removal rate can reach 70%, and getting clear liquid, to survey its pH be 12.81.
embodiment 2:
A kind of bentone earth cooperation quick lime green liquor silicon removing method, comprises the following steps:
1) insert in the causticization section green liquor 1L of clarification after modified alta-mud 20g and quick lime 10g being mixed, be heated to 95 DEG C, stirring reaction 20min;
2) leave standstill 30min, filter, its silica removal rate can reach more than 80%, and getting clear liquid, to survey its silicone content be 1.17g/L.
Embodiment 3:
A kind of bentone earth cooperation quick lime green liquor silicon removing method, comprises the following steps:
1), after modified alta-mud 39g and quick lime 15g being mixed, insert in the 1L causticization section green liquor of clarification, be heated to 95 DEG C, stirring reaction 30min;
2) leave standstill 20min, filter, its silica removal rate can reach more than 85%, and getting clear liquid, to survey its silicone content be 1.94g/L.
Embodiment 4:
A kind of bentone earth cooperation quick lime green liquor silicon removing method, comprises the following steps:
1), after modified alta-mud 40g and quick lime 5g being mixed, insert in the 1L causticization section green liquor of clarification, be heated to 98 DEG C, stirring reaction 18min;
2) leave standstill reaction 28min, filter, the silica removal green liquor of filtration, its silica removal rate can reach more than 95%, and getting clear liquid, to survey its pH be 13.5, still keeps strong basicity.
Claims (5)
1. a bentone earth cooperation quick lime green liquor silicon removing method, is characterized in that, comprise the following steps:
1) mixing of the quick lime of trivalent metal salt modified alta-mud 10-40g and 5-20g be placed in the 1L green liquor after clarification, be heated to 90-100 DEG C, in silica removal groove, stir 10-30min, wherein, the active oxidation calcium content of described quick lime is 80%-90%;
2) proceed in hopper by mixed liquor, leave standstill and fully react 10-30min, filter to obtain silica removal green liquor, its silica removal rate can reach 70%-95%.
2. a kind of bentone earth cooperation quick lime green liquor silicon removing method according to claim 1, is characterized in that, comprise the following steps:
1) insert in the 1L causticization section green liquor of clarification after modified alta-mud 10g and quick lime 20g being mixed, be heated to 100 DEG C, stirring reaction 10min;
2) leave standstill 10min, filter, filter to obtain silica removal green liquor, its silica removal rate can reach 70%, and getting clear liquid, to survey its pH be 12.81.
3. a kind of bentone earth cooperation quick lime green liquor silicon removing method according to claim 1, is characterized in that, comprise the following steps:
1) insert in the 1L causticization section green liquor of clarification after modified alta-mud 20g and quick lime 10g being mixed, be heated to 95 DEG C, stirring reaction 20min;
2) leave standstill 30min, filter, its silica removal rate can reach more than 80%, and getting clear liquid, to survey its silicone content be 1.17g/L.
4. a kind of bentone earth cooperation quick lime green liquor silicon removing method according to claim 1, is characterized in that, comprise the following steps:
1), after modified alta-mud 39g and quick lime 15g being mixed, insert in the 1L causticization section green liquor of clarification, be heated to 95 DEG C, stirring reaction 30min;
2) leave standstill 20min, filter, its silica removal rate can reach more than 85%, and getting clear liquid, to survey its silicone content be 1.94g/L.
5. a kind of bentone earth cooperation quick lime green liquor silicon removing method according to claim 1, is characterized in that, comprise the following steps:
1), after modified alta-mud 40g and quick lime 5g being mixed, insert in the 1L causticization section green liquor of clarification, be heated to 98 DEG C, stirring reaction 18min;
2) leave standstill reaction 28min, filter, filter to obtain silica removal green liquor, its silica removal rate can reach more than 95%, and getting clear liquid, to survey its pH be 13.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310354168.8A CN103397555B (en) | 2013-08-15 | 2013-08-15 | A kind of bentone earth cooperation quick lime green liquor silicon removing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310354168.8A CN103397555B (en) | 2013-08-15 | 2013-08-15 | A kind of bentone earth cooperation quick lime green liquor silicon removing method |
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| Publication Number | Publication Date |
|---|---|
| CN103397555A CN103397555A (en) | 2013-11-20 |
| CN103397555B true CN103397555B (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310354168.8A Expired - Fee Related CN103397555B (en) | 2013-08-15 | 2013-08-15 | A kind of bentone earth cooperation quick lime green liquor silicon removing method |
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| CN112974476A (en) * | 2021-02-06 | 2021-06-18 | 达州励志环保科技有限公司 | Method for treating aluminum ash by using caustic soda |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1248652A (en) * | 1999-09-06 | 2000-03-29 | 许绍良 | Resource type treating method for waste liquor in alkaline process paper making |
| CN1512006A (en) * | 2002-12-27 | 2004-07-14 | 石华才 | Production and application of black liquid separating agent for straw pulp paper-making |
| CN102041703A (en) * | 2010-12-02 | 2011-05-04 | 陕西科技大学 | Process for removing silicon in green liquor of papermaking alkali recovery section by seeding |
-
2013
- 2013-08-15 CN CN201310354168.8A patent/CN103397555B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1248652A (en) * | 1999-09-06 | 2000-03-29 | 许绍良 | Resource type treating method for waste liquor in alkaline process paper making |
| CN1512006A (en) * | 2002-12-27 | 2004-07-14 | 石华才 | Production and application of black liquid separating agent for straw pulp paper-making |
| CN102041703A (en) * | 2010-12-02 | 2011-05-04 | 陕西科技大学 | Process for removing silicon in green liquor of papermaking alkali recovery section by seeding |
Non-Patent Citations (1)
| Title |
|---|
| 改性膨润土处理含酚废水的研究;聂锦旭，肖贤明;《矿业研究与开发》;20060630;第26卷(第3期);第49-51页 * |
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| CN103397555A (en) | 2013-11-20 |
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