CN106702804A - Method for extracting lignin from black liquor - Google Patents
Method for extracting lignin from black liquor Download PDFInfo
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- CN106702804A CN106702804A CN201611176910.0A CN201611176910A CN106702804A CN 106702804 A CN106702804 A CN 106702804A CN 201611176910 A CN201611176910 A CN 201611176910A CN 106702804 A CN106702804 A CN 106702804A
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- Prior art keywords
- lignin
- black liquor
- black
- liquid
- gas
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- 229920005610 lignin Polymers 0.000 title claims abstract 23
- 238000000034 method Methods 0.000 title claims abstract 14
- 239000007788 liquid Substances 0.000 claims abstract 13
- 239000002253 acid Substances 0.000 claims abstract 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract 5
- 239000003546 flue gas Substances 0.000 claims abstract 5
- 239000012528 membrane Substances 0.000 claims abstract 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract 4
- 238000001035 drying Methods 0.000 claims abstract 4
- 238000004806 packaging method and process Methods 0.000 claims abstract 2
- 238000000746 purification Methods 0.000 claims abstract 2
- 238000010000 carbonizing Methods 0.000 claims 12
- 238000000926 separation method Methods 0.000 claims 9
- 239000007789 gas Substances 0.000 claims 7
- 210000005056 cell body Anatomy 0.000 claims 5
- 238000003763 carbonization Methods 0.000 claims 3
- 239000012530 fluid Substances 0.000 claims 3
- 230000008676 import Effects 0.000 claims 3
- 238000005374 membrane filtration Methods 0.000 claims 3
- 239000000919 ceramic Substances 0.000 claims 2
- 238000002156 mixing Methods 0.000 claims 2
- 239000010865 sewage Substances 0.000 claims 2
- 238000003756 stirring Methods 0.000 claims 2
- 230000032683 aging Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000004140 cleaning Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- 230000008020 evaporation Effects 0.000 claims 1
- 239000000706 filtrate Substances 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
- 238000000227 grinding Methods 0.000 claims 1
- 239000012535 impurity Substances 0.000 claims 1
- 239000000047 product Substances 0.000 claims 1
- 239000011265 semifinished product Substances 0.000 claims 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims 1
- 229910010271 silicon carbide Inorganic materials 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000006277 sulfonation reaction Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract 2
- 239000002351 wastewater Substances 0.000 abstract 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000004571 lime Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0007—Recovery of by-products, i.e. compounds other than those necessary for pulping, for multiple uses or not otherwise provided for
Landscapes
- Paper (AREA)
Abstract
The invention discloses a method for extracting lignin from black liquor. The method disclosed by the invention has the characteristics that the method involves a raw material black liquor pretreatment system, a flue gas purification system, an inorganic membrane concentration and filtration system and an acid extraction system, and also involves a device which has the functions of energy-saving drying and automatic packaging and adopts flue gas of a clean boiler or a lime kiln for pre-treating the black liquor, so that a pH (Potential of Hydrogen) value of the black liquid is reduced; the pretreated black liquor is concentrated and filtered by an inorganic membrane, so that the yield and the purity of the lignin are increased, and the method is more energy-saving than a traditional technology; filter pressing is carried out on concentrated and separated lignin liquor, so that the dryness is increased to 60 percent; sulfuric acid is added for carrying out acid extraction on the lignin, acid wastewater generated after washing a lignin product is reused by the black liquor pretreatment system, no wastewater is drained, the acid consumption is reduced furthest, and the like.
Description
Technical field
Field the present invention relates to extract lignin in black liquor, and in particular to a kind of method that lignin is extracted in black liquor.
Background technology
Lignin (1ignin) is a kind of natural polyhydroxy fragrant compounds, is largely deposited in timber and straw or like vegetable
It and cellulose, hemicellulose are the main composition of plant.Lignin as second largest renewable resource, on ground
Yield on ball is only second to cellulose.Biomass energy, organic chemical industry are produced by dissolving cracking process as raw material with lignin
The modified of raw material and lignin is research and development focus in recent years.Lignin is that uniquely can largely provide in nature can be again
The non-oil resource of raw compound aromatic base, it is to improve biomass resource utilization efficiency to use it to prepare high valuable chemicals
It is crucial.The economy that the energy is produced from reusable edible biomass will be greatly improved by its high value added product developed.Existing
The paper mill of generationization, lignin and hemicellulose in papermaking wastewater be burned off reclaiming alkali and partial heat energy, only very little
Part is used for other commercial objects.If effectively utilizing this partial lignin, can not only mitigate environmental pollution；And can
With the Development and Production energy.The lignin that is extracted from black liquor of pulp making and derivative chemical industry, agricultural, cement and concrete,
The field such as plastics and macromolecular material is widely used.
Paper-making industry is the heavy polluted industry of China, and most important of which is exactly the treatment of black liquid.Normal conditions
Under, enterprise is to the two methods of general use of black liquor treatment：One kind is to carry out concentration burning to black liquor；Another kind is opened using black liquor
Feel numb lignin products.The preceding kind of concentrated burning of method black liquor, although the alkali and part calorific value in black liquor can be reclaimed, but it is wooden to alkali
Usually say it is but a kind of low value Land use systems, and equipment investment is big, it is high to consume energy.Later approach carries out chemistry by alkali lignin
It is modified, lignified chemical product is developed, its high added value is improved, it is the good method rationally using alkali lignin, while being also big
Scale is using black liquid, the fundamental solution alleviated and finally eradicate paper-making black liquor.
Also have about extracting the Chinese patent literature of lignin method through retrieval, it is as follows：
1st, Chinese patent<Application number> 201310082509.0<Denomination of invention>A kind of utilization black liquid prepares the side of lignin
Method<Applicant>Zhejiang Jie Fa Science and Technology Ltd.s<Address>Shaoxing, Zhejiang Province city Shaoxing new coastal city Li Hai towns landscape 299
Number Room 207<Inventor>Shao Guobiao<Summary>The invention discloses a kind of method that utilization black liquid prepares lignin, to make
Paper black liquor is raw material, and black liquid is pre-processed, and removes water-insoluble particle and fibrous impurity；Film process is recycled to remove
The organic matter less than lignin molecule amount is removed, concentrate is obtained；Then to carrying out acid out treatment in concentrate, macromolecular is obtained thick
Lignin deposit；The inorganic salts produced by acid out most are removed through desalination afterwards, high-purity lignin is obtained final product.The method of the present invention its receipts
Rate is not influenceed by the change of raw material black liquid consistency, and separation and Extraction lignin purity is high, and molecular size range is more uniform, removal of impurity
Height, modified sodium lignosulfonate application of dispersant performance is significantly improved obtained in sulfonated condensation.
2nd, Chinese patent<Application number> 200880127214.8<Denomination of invention>Method, wood from black liquid separation lignin
The application of lignin products and lignin product in fuel or material manufacture<Applicant>Lignoboost AB<Address>Sweden
Gothic fort<Inventor>Friedrich strategic point is graceful, Han Siteliande, Pei Ertuomani, and Peter's acthar is high<Summary>
The present invention relates to control pulp mill in sodium and sulphur balance while from black liquor separating lignin method.Further relate to thus
Lignin product or middle lignin product that method is obtained.Exist the invention further relates to lignin product or middle lignin product
Prepare fuel（Solid, gas or liquid）Or the application in material.The described method comprises the following steps：(1) will be wooden using acid
Element precipitation, is then filtered, and (2), by filter cake settling flux, (3) filtering forms the second filter cake, and (4) reclaim filtrate, for preceding
State the cleaning and suspension in step.In a preferred embodiment, generated in recovery boiler rich in sodium sulphate
The lignin of ESP dust cleaning precipitation.
3rd, Chinese patent<Application number>98100904.2<Denomination of invention>Black liquor and alkali double back are received<Application
People>Liu Ping<Address>Anyang City radiance road 26<Inventor>Liu Ping<Summary>It is dirty the present invention relates to a kind of black liquid
The method and apparatus that the method that dye is administered and comprehensively utilized, particularly high concentration black liquor and alkali double back are received.It
High concentration including black liquor is extracted, and black liquor is flashed with sulfur dioxide flue gas, and sulfur dioxide acid out is used in JBR absorber
Separating lignin and causticization reclaim the big step of alkali lye four.The present invention is made back by solving the problems, such as high concentration black liquor lignin acid out
The alkali concn of receipts is improved and reaches reuse requirement, that is, overcome traditional alkali collection energy consumption greatly, and investment is big, chronic disease of poor benefits, fills again
Divide the resource reclaimed in black liquor, with preferable economic benefit and environmental benefit.
4th, Chinese patent<Application number>201510561740.7<Denomination of invention>It is a kind of wooden by black liquid extraction separation
The device and method of element<Applicant>Wuhan Kaibisi Electric Power Equipment Co., Ltd.<Address>The high-new skill in Wuhan City, Hubei Province East Lake
Art development zone optical valley main road No. 1 International Business Center Wenchang of spy building Building A 402<Inventor>Xu Junhong, Lv Xinlu<Summary>This hair
It is bright to be related to pulping wastewater treatment technical field, and in particular to a kind of device and method that separating lignin is extracted by black liquid.
It is of the invention that the device and method of separating lignin is extracted using the CO in alkali recovery boiler tail gas by black liquid2、SO2Deng acid
Property gas treatment carried out to black liquor lignin is separated out with precipitation form, although nitrogen, the sulphur produced for whole pulping system
Removing can make a part of nitrogen, oxysulfide part rest on lignin extraction system without substantial help, so as to alleviate
The load of vent gas treatment, reaches the effect of " treatment of wastes with processes of wastes against one another ", while whole pulping system and being not introduced into new impurity, produces work
Skill is not required to do too big adjustment.
5th, Chinese patent<Application number>200910077742.3<Denomination of invention>The method of extracting lignose from papermaking black liquor<
Applicant>Beijing Jiahemu Science and Technology Co., Ltd<Address>The ChengJian Building A1108 rooms of Taipingzhuang North Road, Haidian District, Beijing City 18<
Inventor>Song Yujun, Wu Yong<Summary>Invention is related to the method for extracting lignose from papermaking black liquor.The pollution-free profit of black liquid
With the problem for being puzzlement Paper Industry Development.Black liquid is carried out pH and adjusted to 8-10 by the present invention, is entered by pretreatment system
Row pretreatment, removes big suspended particulate and colloidal impurity；Pretreatment system is that a filtering accuracy is 100 to 300 mesh scopes
Mechanical oscillation sieve filter or bag filter, and a molecular cut off are that 200,000-50 ten thousand scopes are divided by modified
From film；Modified separation membrane material is by bulk graft is modified, surface graft modification or alloying；By two grades or two grades with
Upper seperation film carries out refined filtration, and the molecular cut off of seperation films at different levels is from 150 to 50000.Vinsol in the invention product
Content is not less than 55%, up to more than 90.O% after concentration purification；Heatproof is up to more than 130 DEG C；Apparent content of ashes is smaller than
5%；And tunable molecular weight size and distribution, produce the lignin product of different qualities；The abundant circulation of water can be accomplished simultaneously
Utilize.
From disclosed technical literature, it is known that, the conventional method that lignin is extracted from papermaking wastewater is acid-precipitation method.Acid out
Method is to extract the effective ways of lignin, and it is mainly makes the sodium ion in alkali lignin be replaced with the hydrogen ion in acid, with
Just make alkali lignin turns into insoluble sediment again, can be by method separation and Extractions from pulping back liquor such as filterings
Go out lignin.Also useful organic film ultrafiltration directly extracts lignin from black liquor.
The advantage of acid-precipitation method is that investment is low, simple to operate, has the disadvantage that spent acidic water is big, and environmental protection treatment high cost is wooden
Plain product purity is low, can only be used as low-end applications.
The content of the invention
The purpose of the present invention is directed to the defect of prior art, there is provided a kind of both energy-conservations, while can improve lignin again
Extractability, reduces investment and manufacturing cost, reduces energy-conserving and environment-protective, the continuous black liquor for extracting of discharge amount of pollution and pollutional load
The middle method for extracting lignin.
In order to realize the invention described above purpose, the technical scheme for using for：
A kind of method that lignin is extracted in black liquor, the described method comprises the following steps：
（1）Kiln gas is purified, by furnace flue gas through the dedusting of three-level flue gas cleaning tower, removal of impurities, after purification, then through furnace gas air blast
Machine is by clean CO2Gas is respectively pressed into the carbonizing trough inner bottom parts at different levels in carbonizing trough group, clean CO by pipeline2Gas by
Carbonizing trough inner bottom part is emerged；
（2）Black liquor pretreatment, the mixing black liquor that slip house is sent is continuously introduced into carbonizing trough group, and mixing black liquor is in carbonizing trough group
It is middle to be incremented by overflow step by step through one-level to senior order, uninterrupted uniform stirring carried out by agitator in carbonizing trough black
Liquid, while by clean CO2Gas is respectively pressed into carbonizing troughs at different levels, is sufficiently mixed with the black liquor in groove, is carbonated,
Carbonation reaction reaches pH=9~7 in afterbody carbonizing trough, stops the CO in press-in respective stages carbonizing trough2Gas, last
Liquid in level carbonizing trough enters semi-finished product storage tank from overfall overflow, and carbonization black liquor is obtained, standby；
（3）Membrane filtration, by step（2）In obtained carbonization black liquor by being pumped into membrane filtration system, carbonization black liquor passes through film mistake
Filter system is obtained film trapped fluid and filter liquor, and film trapped fluid delivers to acidifying groove；Filter liquor delivers to slurrying reuse or evaporation process；
（4）Lignin acidizing separation, step is added by the concentrated sulfuric acid（3）In acidifying groove in be acidified, while add the concentrated sulfuric acid while uniformly stir
Mix, acid adding is stopped after acidifying reaches pH=3~4, acidifying black liquor is obtained, acidifying black liquor is delivered into lignin acidizing separation ageing tank, make
Obtain lignin acidizing separation liquid；Lignin acidizing separation liquid is delivered into filter press again carries out separation of solid and liquid, and lignin acidizing separation liquid and acid filtrate is obtained；Acid
Filter liquor sends one-level carbonizing trough back to, and lignin acidizing separation liquid delivers to sulfonation and is re-fed into drying system or is fed directly to drying system；
（5）Lignin acidizing separation liquid is dried, the hollow blade dryer of lignin acidizing separation liquid feeding drying system is dried, and lignin is dried
After powdering, cooling, packaging is obtained lignin product.
The above carbonizing trough includes cell body and agitator, and agitator is vertically arranged to the center of cell body, the cell body
Top end face is provided with gas approach, and black liquor import and black liquid outlet are provided near cell body top end face, and cell body lower semisection is provided with row
Dirty mouth.
Ring flange group is equipped with the above black liquor import, gas approach, black liquid outlet and sewage draining exit.
The above ring flange group is constituted for two panels ring flange.
The above agitator includes motor, speed changer, rotary shaft and impeller；Motor is connected with speed changer, speed change
Device is connected with rotary shaft, and impeller is installed with rotary shaft.
Membrane component and membrane module are provided with the above membrane filtration system, described membrane component is porous, inorganic ceramics, if
Meter flux chooses 50~100LMH；Described membrane module is using string and silicon carbide ceramics.
The above film trapped fluid is dense trapped fluid.
Prominent substantive distinguishing features and significant progress that the present invention has relative to prior art：
1st, the present invention can be pre-processed effectively using kiln gas to pulping waste liquor, reduce pH value, save acid consumption, be given full play to
The speciality of carborundum inoranic membrane, therefore energy consumption has effectively been saved, acid waste water discharge is reduced, it is adapted to large-scale production；
2nd, membrane module can be operated under high concentration, high concentration multiple in membrane filtration system of the invention, and energy-saving efficiency is high, subtracts significantly
Of low pollution is discharged；
3rd, extraction process flow of the present invention extracts lignin method and improves lignin yield 10-15% than tradition, increases
Yield and product quality, due to improving cycles of concentration, acid consumption is only 1/10th of conventional method；
4th, the highly concentrated supplement lignin by acid separation of the present invention reduces energy consumption and acid consumption, and no acidic discharge of wastewater, reduction subsequently dries energy
Consumption；
5th, serialization lignin extraction technique of the present invention, the characteristics of have acid-precipitation method and embrane method concurrently, makes flow simple, operating procedure letter
Change, therefore the investment of grassroot project is low, is particularly well-suited to mega project；
6th, lignin extraction strong adaptability of the present invention to various fibrous raw materials.
Brief description of the drawings
Fig. 1 is the process flow diagram of the method for extraction lignin in a kind of black liquor of the invention.
Fig. 2 is the structural representation of carbonizing trough.
Fig. 3 is the structural representation of agitator.
Fig. 4 is the process flow diagram of gas cleaning.
Fig. 5 is black liquor pretreatment process flow diagram.
Fig. 6 is membrane filtration process schematic flow sheet.
Fig. 7 is supplement acid out process flow diagram.
Fig. 8 is dry packing process flow diagram.
Element title and serial number in figure：Cell body 1, black liquor import 2, gas approach 3, motor 4, speed changer 5, black liquor goes out
Mouth 6, sewage draining exit 7, ring flange group 8, rotary shaft 9, impeller 10.
Specific embodiment
With reference to embodiments of the invention, the present invention is described in more detail.
Referring to shown in Fig. 1-4, a kind of method that lignin is extracted in black liquor the described method comprises the following steps：
（1）Kiln gas is purified, by furnace flue gas through the dedusting of three-level flue gas cleaning tower, removal of impurities, after purification, then through furnace gas air blast
Machine is by clean CO2Gas is respectively pressed into the carbonizing trough inner bottom parts at different levels in carbonizing trough group, clean CO by pipeline2Gas by
Carbonizing trough inner bottom part is emerged；
（2）Black liquor pretreatment, the mixing black liquor that slip house is sent is continuously introduced into carbonizing trough group, and mixing black liquor is in carbonizing trough group
It is middle to be incremented by overflow step by step through one-level to senior order, uninterrupted uniform stirring carried out by agitator in carbonizing trough black
Liquid, while by clean CO2Gas is respectively pressed into carbonizing troughs at different levels, is sufficiently mixed with the black liquor in groove, is carbonated,
Carbonation reaction reaches pH=9~7 in afterbody carbonizing trough, stops the CO in press-in respective stages carbonizing trough2Gas, last
Liquid in level carbonizing trough enters semi-finished product storage tank from overfall overflow, and carbonization black liquor is obtained, standby；
（3）Membrane filtration, by step（2）In obtained carbonization black liquor by being pumped into membrane filtration system, carbonization black liquor passes through film mistake
Filter system is obtained film trapped fluid and filter liquor, and film trapped fluid delivers to acidifying groove；Filter liquor delivers to slurrying reuse or evaporation process；
（4）Lignin acidizing separation, step is added by the concentrated sulfuric acid（3）In acidifying groove in be acidified, while add the concentrated sulfuric acid while uniformly stir
Mix, acid adding is stopped after acidifying reaches pH=3~4, acidifying black liquor is obtained, acidifying black liquor is delivered into lignin acidizing separation ageing tank, make
Obtain lignin acidizing separation liquid；Lignin acidizing separation liquid is delivered into filter press again carries out separation of solid and liquid, and lignin acidizing separation liquid and acid filtrate is obtained；Acid
Filter liquor sends one-level carbonizing trough back to, and lignin acidizing separation liquid delivers to sulfonation and is re-fed into drying system or is fed directly to drying system；
（5）Lignin acidizing separation liquid is dried, the hollow blade dryer of lignin acidizing separation liquid feeding drying system is dried, and lignin is dried
After powdering, cooling, packaging is obtained lignin product.
The above carbonizing trough includes cell body 1 and agitator, and agitator is vertically arranged to the center of cell body 1, the cell body 1
Top end face be provided with gas approach 3, be provided with black liquor import 2 and black liquid outlet 6, the lower semisection of cell body 1 near the top end face of cell body 1
It is provided with sewage draining exit 7；Ring flange group 8 is equipped with the black liquor import 2, gas approach 3, black liquid outlet 6 and sewage draining exit 7；It is described
Ring flange group 8 is constituted for two panels ring flange.
The above agitator includes motor 1, speed changer 5, rotary shaft 9 and impeller 10；Motor 1 connects with speed changer 5
Connect, speed changer 5 is connected with rotary shaft 9, impeller 10 is installed with rotary shaft 9.
Membrane component and membrane module are provided with the above membrane filtration system, described membrane component is porous, inorganic ceramics, if
Meter flux chooses 50~100LMH；Described membrane module is using string and silicon carbide ceramics.
Claims (7)
1. a kind of method that lignin is extracted in black liquor, it is characterised in that：The described method comprises the following steps：
（1）Kiln gas is purified, by furnace flue gas through the dedusting of three-level flue gas cleaning tower, removal of impurities, after purification, then through furnace gas air blast
Machine is by clean CO2Gas is respectively pressed into the carbonizing trough inner bottom parts at different levels in carbonizing trough group, clean CO by pipeline2Gas by
Carbonizing trough inner bottom part is emerged；
（2）Black liquor pretreatment, the mixing black liquor that slip house is sent is continuously introduced into carbonizing trough group, and mixing black liquor is in carbonizing trough group
It is middle to be incremented by overflow step by step through one-level to senior order, uninterrupted uniform stirring carried out by agitator in carbonizing trough black
Liquid, while by clean CO2Gas is respectively pressed into carbonizing troughs at different levels, is sufficiently mixed with the black liquor in groove, is carbonated,
Carbonation reaction reaches pH=9~7 in afterbody carbonizing trough, stops the CO in press-in respective stages carbonizing trough2Gas, last
Liquid in level carbonizing trough enters semi-finished product storage tank from overfall overflow, and carbonization black liquor is obtained, standby；
（3）Membrane filtration, by step（2）In obtained carbonization black liquor by being pumped into membrane filtration system, carbonization black liquor passes through film mistake
Filter system is obtained film trapped fluid and filter liquor, and film trapped fluid delivers to acidifying groove；Filter liquor delivers to slurrying reuse or evaporation process；
（4）Lignin acidizing separation, step is added by the concentrated sulfuric acid（3）In acidifying groove in be acidified, while add the concentrated sulfuric acid while uniformly stir
Mix, acid adding is stopped after acidifying reaches pH=3~4, acidifying black liquor is obtained, acidifying black liquor is delivered into lignin acidizing separation ageing tank, make
Obtain lignin acidizing separation liquid；Lignin acidizing separation liquid is delivered into filter press again carries out separation of solid and liquid, and lignin acidizing separation liquid and acid filtrate is obtained；Acid
Filter liquor sends one-level carbonizing trough back to, and lignin acidizing separation liquid delivers to sulfonation and is re-fed into drying system or is fed directly to drying system；
（5）Lignin acidizing separation liquid is dried, the hollow blade dryer of lignin acidizing separation liquid feeding drying system is dried, and lignin is dried
After powdering, cooling, packaging is obtained lignin product.
2. the method that lignin is extracted in black liquor according to claim 1, it is characterised in that：The carbonizing trough includes cell body
（1）And agitator, agitator is vertically arranged to cell body（1）Center, the cell body（1）Top end face be provided with gas approach
（3）, near cell body（1）Top end face is provided with black liquor import（2）And black liquid outlet（6）, cell body（1）Lower semisection is provided with sewage draining exit
（7）.
3. according to the method that lignin is extracted in the black liquor described in claim 2, it is characterised in that：The black liquor import（2）, flue gas
Import（3）, black liquid outlet（6）And sewage draining exit（7）On be equipped with ring flange group（8）.
4. the method that lignin is extracted in black liquor according to claim 3, it is characterised in that：The ring flange group（8）For
Two panels ring flange is constituted.
5. the method that lignin is extracted in black liquor according to claim 2, it is characterised in that：The agitator includes electronic
Machine（1）, speed changer（5）, rotary shaft（9）And impeller（10）；Motor（1）With speed changer（5）Connection, speed changer（5）With rotation
Axle（9）Connection, rotary shaft（9）On be installed with impeller（10）.
6. the method that lignin is extracted in black liquor according to claim 1, it is characterised in that：Set in the membrane filtration system
There are membrane component and membrane module, described membrane component is porous, inorganic ceramics, and design flux chooses 50~100LMH；Described film group
Part is using string and silicon carbide ceramics.
7. the method that lignin is extracted in black liquor according to claim 1, it is characterised in that：The film trapped fluid is dense section
Stay liquid.
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| CN201611176910.0A CN106702804B (en) | 2016-12-19 | 2016-12-19 | A kind of method that lignin is extracted in black liquor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111320762A (en) * | 2020-04-09 | 2020-06-23 | 中国中轻国际工程有限公司 | System and process for preparing acid-out lignin and sodium lignosulfonate from pulping black liquor |
| CN115748284A (en) * | 2022-11-29 | 2023-03-07 | 大唐东北电力试验研究院有限公司 | Device and method for adjusting pH value of papermaking black liquor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476257B (en) * | 2009-02-16 | 2011-01-26 | 北京嘉禾木科技有限公司 | Method for extracting lignose from papermaking black liquor |
| CA2836839A1 (en) * | 2011-05-26 | 2012-11-29 | Liquid Lignin Company, Llc | Process for producing furfural from black liquor |
| CN102701201B (en) * | 2012-06-21 | 2015-11-18 | 山东大学 | A kind of lignin from alkaline paper-making black liquor prepares the method for Powdered Activated Carbon |
| CN103145998B (en) * | 2013-03-15 | 2015-06-10 | 浙江捷发科技有限公司 | Method for preparing lignin by utilizing papermaking black liquid |
| CN105088847B (en) * | 2015-09-07 | 2018-02-13 | 武汉凯比思电力设备有限公司 | A kind of device and method that separating lignin is extracted by black liquid |
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2016
- 2016-12-19 CN CN201611176910.0A patent/CN106702804B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111320762A (en) * | 2020-04-09 | 2020-06-23 | 中国中轻国际工程有限公司 | System and process for preparing acid-out lignin and sodium lignosulfonate from pulping black liquor |
| CN111320762B (en) * | 2020-04-09 | 2021-11-30 | 中国中轻国际工程有限公司 | System and process for preparing acid-out lignin and sodium lignosulfonate from pulping black liquor |
| CN115748284A (en) * | 2022-11-29 | 2023-03-07 | 大唐东北电力试验研究院有限公司 | Device and method for adjusting pH value of papermaking black liquor |
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