CN104448031A - Improved method of traditional sodium alginate production process - Google Patents
Improved method of traditional sodium alginate production process Download PDFInfo
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- CN104448031A CN104448031A CN201310415947.4A CN201310415947A CN104448031A CN 104448031 A CN104448031 A CN 104448031A CN 201310415947 A CN201310415947 A CN 201310415947A CN 104448031 A CN104448031 A CN 104448031A
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Abstract
The invention relates to the field of algae chemical engineering, in particular to a three-stage separation technology for improvement on the traditional production process of sodium alginate. The method is as below: adding 170-190 tons of tap water in per ton of algae digestive juice for dilution; conducting slag and liquid separation on the diluted digestive juice by a three-stage separation technology; dissolving gas in the digestive juice subjected to three-stage separation; conducting foaming separation on the glue solution subjected to gas dissolution, calcifying under the condition of pH value being 6-9, decalcifying, dehydrating and drying to obtain the sodium alginate. The invention adopts a three-stage separation technology including rotary separation, filtration and spiral sedimentation to separate the fluid suspension after digestion by algae. Solid effect increases from 15% to 58%, the diameter of separation particles increases from no less than 1 mm in bolting-silk filter to no more than 0.05 mm, water consumption is saved by 300 ton for per ton of sodium alginate, the concentration of sodium alginate after dilution increases from 1.2% to 1.75%, the production cost for per ton of products reduces by 650 yuan, and COD emission is reduced to 154 ton.
Description
Technical field
The present invention relates to field of alga chemical industry, specifically a kind of three fractionation techniques method that traditional sodium alginate production technique is improved.
Background technology
China's seaweed chemical is started in the end of the sixties in last century, through the development of decades, the sodium alginate annual production of current China reaches more than 30,000 ton, become seaweed chemical products production state the biggest in the world, wherein the output of more than 80% concentrates on Shandong Province, seaweed chemical has digested the laminaria culture output of Shandong Province more than 70%, the Sustainable development of its development relationship whole sea-tangle industry to Shandong Province.
But in recent years due to the continuous decline of sea-tangle quality product and output, the price of sea-tangle is caused constantly to rise, traditional production technique not only needs a large amount of tap water also to consume a large amount of chemical reagent simultaneously simultaneously, and the production cost of product keeps out incessantly fierce market price competition makes enterprise can't bear to bear a heavy burden.
Although the field of alga chemical industry even Ministry of Agriculture all knows that traditional production technique cost is high, complex manufacturing falls behind, but country can not inject capital into enterprise support carry out production technique improvement, enterprise itself does not have ability infusion of financial resources to carry out production technique improvement yet, Here it is causes seaweed chemical enterprise product added value low, one of reason of the state that can only maintain of can not advancing decades.
Second chief reason is exactly seaweed chemical industry because the carbohydrate gum impurity thickness such as the colloid in marine alga are not easily separated, can only lean on the method for diluting with water.This just causes the sector water consumption very big, and a lot of enterprise can not pay the area that high water rate has to stop production or factory transferred to water resources relative abundance.
The seaweed chemical factory of such as Qingdao lacks due to water resources and the water rate of costliness has to enterprise to move to Rushan, Shandong Province county from Qingdao City, and difficult operation several years afterwards or have to stop production due to local water resources and expensive water rate reason! A large chemical complex that once country be proud of disappears like this, and this makes seaweed chemical worker and enterprise unfortunately with distressed! Reason is exactly water! Water! Water! The water consumption reducing the industry is imperative!
Using silk cover filtering Digestive system must be diluted to viscosity in original production technique can by bolting silk, and general marine alga per ton approximately needs 240-270 ton water to dilute, and filtration residue granularity >=1mm! Because little residue particles degree can not be removed, so also need again to filter after flotation cell foams.Original silk cover filtering technique only has about 1.2% due to the concentration using water in a large number and carry out diluting sodium alginate in therefore solution in addition, just needs to expend the more energy and chemical reagent carries out concentrated and chemical conversion in follow-up production.
Summary of the invention
The object of the invention is to apply improving one's methods of a kind of traditional sodium alginate production technique.
For achieving the above object, the technical solution used in the present invention is (after final version by content replication in claims to herein)
The advantage that the present invention has:
1. the present invention adopts three fractionation techniques that the diluting water of marine alga Digestive system per ton is down to 170-190 ton (300 tons of water at least saved by sodium alginate per ton, produce 1 ton of sodium alginate calculate by 6 tons of marine algas) from 240-270 ton.
2. the present invention adopts three fractionation techniques such as revolution separation, filtration and screw settling to be separated the postdigestive suspension of marine alga, solid phase separating effect brings up to 58% from 15%, separating particle diameter from existing silk cover filtering time >=1mm brings up to the present invention≤0.05mm, water consumption sodium alginate per ton saves 300 tons, after dilution, the concentration of sodium alginate brings up to 1.75% from 1.2%, production cost product per ton reduces by 650 yuan, reduces COD and discharges 154 tons.Adopt the most slaking residue particle of mode of the present invention can remove in three fractionation technique techniques, do not need secondary filtration after flotation control, improve production technique, save the energy.
3. in treating processes of the present invention owing to decreasing diluting water amount, the seaweed gel in solution be increased to 1.9% from 1.2%, increase follow-up calcification due to concentration and acidifying production technique saves a large amount of chemical feedstockss and the energy.
4., by annual production 3500 tons calculating, application the present invention three fractionation technique reduces direct production cost 239.38 ten thousand yuan, and reduce effluent charge and sewage disposal expense 108.5 ten thousand yuan, add up to and increase economic benefit 347.88 ten thousand yuan, year saves tap water 354900m
3, cut down COD and discharge 154 tons.
Accompanying drawing explanation
The structural representation preparing gained sodium alginate that Fig. 1 provides for the embodiment of the present invention.
Embodiment
Embodiment 1
Take limnetic dry kelp, bladder wrack, brown alga 1000 kilograms such as blackening thunder pine algae or bark algae etc. as raw material, in raw material, add 10000m
3tap water soak 1-2h.By pump (or adopting bulk kelp pump conventional in those skilled in the art real work) by immersions afterwards raw material be evacuated to after cage is filtered dry moisture and shred, then enter grinder (extra large sodium/HZM-100L) and regulate abrasive disk space 0.5-2.0mm, regulate grinder revolution speed of screw at 2000rpm, 2min.Be transferred to after marine alga after pressure mill sends into crusher (HC1600-90-300KW) broken 10min again and proceed to digester after surge tank (ZS1-200) keeps 1.5h and add concentration 2.%(W/V) Na
2cO
3, 1000L also heats to 75 DEG C of maintenances 6 hours.Proceed to defibrination tank (gap >=1mm) to grind 2min(sea-tangle and do not need defibrination, other bulk kelps mill 1-3 time), finally proceed to the stainless steel with stirring and discharge port and to put in pot and add 150T tap water at normal temperature and continue to be stirred to even.Digestion extracting solution enters roto-sifter by discharge port and carries out flash trapping stage rotating speed 28rpm, power 5.5KW, feed rate 9.2m
3/ h, is separated Ke Li≤0.05mm.Feed opening removes filter residue.One-level filtrate enters track type strainer and carries out the second-order separation, rotating speed 36rpm, power 3.0KW, feed rate 10.5m after adding 20T tap water at normal temperature
3/ h, is separated Ke Li≤0.05mm, and feed opening removes filter residue.Secondary filtrate enters horizontal spiral discharge sedimentation sedimentator and carries out three grades of separation, rotary drum rotating speed: 3000rpm, spiral differential speed 20rpm after continuing to add 20T tap water at normal temperature, feed opening releases filter residue.Digestive system after three grades of separation enters after dissolving carries out molten gas 2.5h and proceeds to foaming pond (dregs of dissolving lower bottom part stay), foaming machine electric current 13A, after foaming 1.5h, clear glue solution enters bottom by chute and enters into aging pond by with having filter bed (aperture≤0.05mm) pond, add the calcium chloride 900L that concentration is 12%, reconciling pH with NaOH is 7.5, aging 2h.Use cage to collect alginate calcium and be transferred to souring tank, add 36-38% hydrochloric acid 95Kg and regulate pH 2.0 to carry out decalcification.Lalgine cage after decalcification is filtered dry moisture 650 type single pole expellers (Wuxi customization) and carries out squeezing and carry out primary dewatering, second dehydration is carried out again through 680 types (Wuxi customization) two bar expeller, Lalgine after dehydration is pulverized with the hammer crusher being connected to blower fan and the soda ash 580L(soda ash consumption adding 10% can change and to judge according to color, rubicundity also needs to add alkali, the look alkali number that turns blue is excessive), regulate pH7.2, stir 20min, wind pushing temperature≤135 DEG C of blower fan, namely obtain the sodium alginate 167-185Kg shown in Fig. 1 after air-dry.Product pick-up rate is raising 0.29 percentage point compared with prior art mode, and viscosity improves 82CPS, ton water consumption decline 101.4m
3, ton consumption calcium chloride decline 0.77t/t.
Embodiment 2
Take limnetic dry kelp, bladder wrack, brown alga 1000 kilograms such as blackening thunder pine algae or bark algae etc. as raw material, in raw material, add 10000m
3tap water soak 1-2h.By bulk kelp pump raw material after immersion is evacuated to after cage is filtered dry moisture and shreds, then enter grinder (extra large sodium/HZM-100L) and regulate abrasive disk space 0.5-2.0mm, regulating grinder revolution speed of screw at 2000rpm, 2min.Be transferred to after marine alga after pressure mill sends into crusher (HC1600-90-300KW) broken 10min again and proceed to digester after surge tank (ZS1-200) keeps 1.5h and add concentration 2.%(W/V) Na
2cO
3, 1000L also heats to 75 DEG C of maintenances 6 hours.Proceed to defibrination tank (gap >=1mm) and grind 2min, finally proceed to and there is stirring and the stainless steel of discharge port to put in pot and add 130T tap water at normal temperature and continue to be stirred to evenly.Digestion extracting solution enters trommel screen by discharge port and carries out flash trapping stage rotating speed 20rpm, power 3.5KW, feed rate 9.2m
3/ h, is separated Ke Li≤0.05mm.Feed opening removes filter residue.One-level filtrate enters belt filter and carries out the second-order separation, rotating speed 28rpm, power 4.2KW, feed rate 10.5m after adding 40T tap water at normal temperature
3/ h, is separated Ke Li≤0.05mm, and feed opening removes filter residue.Secondary filtrate enters after continuing to add 20T tap water at normal temperature that spun down is centrifugal carries out three grades of separation, rotary drum rotating speed: 2000rpm, spiral differential speed 5rpm, feed rate 13.55m
3/ h, feed opening releases filter residue.Three grades be separated after Digestive system enter dissolving carry out molten gas 2.5h after supernatant liquid proceed to foaming pond, foaming machine electric current 13A, after foaming 2.5h, clear glue solution enters bottom by chute and enters into aging pond by with having filter bed (aperture≤0.05mm) pond, add the calcium chloride 1000L that concentration is 10%, reconciling pH with NaOH is 7.5, aging 2h.Use cage to collect alginate calcium and be transferred to souring tank, add 36-38% hydrochloric acid 105Kg and regulate pH 2.0 to carry out decalcification.Lalgine cage after decalcification is filtered dry moisture 650 type single pole expellers (Wuxi customization) and carries out squeezing and carry out primary dewatering, second dehydration is carried out again through 680 types (Wuxi customization) two bar expeller, Lalgine after dehydration is pulverized with the hammer crusher being connected to blower fan and is added the soda ash 580L of 12%, wind pushing temperature≤135 DEG C of blower fan, regulate pH7.5, stir 15min, after air-dry, namely obtain the sodium alginate shown in Fig. 1.
Claims (8)
1. the improving one's methods of a traditional sodium alginate production technique, it is characterized in that: add 170-190 ton tap water in marine alga Digestive system per ton and dilute, after dilution, Digestive system carries out the separation of slag liquid through three fractionation techniques, Digestive system after three-stage filtration carries out molten gas, glue after molten gas carries out foaming and is separated, after foaming is separated under the condition of pH value at 6-9 calcification processing, again through decalcification, dehydration after calcification processing, air-dryly namely obtain sodium alginate.
2. improving one's methods by traditional sodium alginate production technique according to claim 1, it is characterized in that: after described dilution, Digestive system carries out the separation of slag liquid through three fractionation techniques is be separated through one-level revolution by Digestive system after dilution, and gained parting liquid enters cascade filtration and is separated; Digestion parting liquid after cascade filtration is separated enters three-stage filtration screw settling and is separated.
3. improving one's methods by the traditional sodium alginate production technique described in claim 1 or 2, is characterized in that: it is that one or more forms combining sieve of justifying roto-sifter, roto-sifter or trommel screen carry out revolution separation that described one-level revolution is separated; Revolution is separated rotating speed 28rpm-20rpm, charging limit flow 9-12m3/h, separating particles d
c=0.05mm, screening efficiency 49-52%.
4. improving one's methods by the traditional sodium alginate production technique described in claim 1 or 2, is characterized in that: it is carry out filtering separation with the form of one or more combination filters of Caterpiller filter, band filter or track type vacuum filter that described cascade filtration is separated; Filtering separation rotating speed is 25-36rpm, feed rate 10-12m
3/ h, separating particles d
c=0.05mm, screening efficiency 50-55%.
5. improving one's methods by the traditional sodium alginate production technique described in claim 1 or 2, is characterized in that: it is carry out screw settling separation with horizontal spiral discharge sedimentation centrifuge and/or spun down whizzer that described three-stage filtration screw settling is separated; The settlement separate middle feed rate 12-13.55m of filtering screw
3/ h, d
c=0.05mm, screening efficiency 51-59%; Wherein rotary drum rotating speed 2000-3000rpm, spiral differential speed 5-25rpm.
6. improving one's methods by traditional sodium alginate production technique according to claim 1, is characterized in that: describedly after soaking, carry out digestion process after the chopping of marine alga former algae through alkali lye, stand-by.
7. improving one's methods by traditional sodium alginate production technique according to claim 1, is characterized in that: add in Calcium Fluoride (Fluorspan), calcium carbonate, calcium oxide in the clear glue solution after described foaming is separated one or more carry out calcification and adjust ph at 6-9.
8. improving one's methods by traditional sodium alginate production technique according to claim 1, it is characterized in that: the solution after described calcification enter aging after drained away the water by cage, hydrochloric acid is added again by the alginate calcium drained away the water, dilute sulphuric acid, hypochlorous acid, carbonic acid, one or more in chloric acid carry out decalcification, Lalgine after decalcification dewaters through two dry expeller after the squeezing of single pole expeller again, sodium carbonate is added in Lalgine after dehydration, sodium bicarbonate, one or more in sodium hydroxide stir, mix and blend 10-20min, and pass into the air-dry acquisition sodium alginate of air dryer of wind pushing temperature≤135 DEG C.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106317251A (en) * | 2016-08-17 | 2017-01-11 | 中国水产科学研究院黄海水产研究所 | Seaweed chemical engineering environment protection calcification process |
| CN108329400A (en) * | 2017-01-20 | 2018-07-27 | 山东洁晶集团股份有限公司 | A method of digestion thunder pine algae extracts algin |
| CN108329402A (en) * | 2017-01-20 | 2018-07-27 | 中国科学院过程工程研究所 | A method of digestion brown alga rhizome extracts algin |
| CN115926016A (en) * | 2022-12-19 | 2023-04-07 | 山东洁晶集团股份有限公司 | Method for improving transparency and reducing turbidity of sodium alginate produced by calcification method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101585890A (en) * | 2008-06-20 | 2009-11-25 | 青岛聚大洋海藻工业有限公司 | Method for preparing sodium alginate by using giant kelp |
-
2013
- 2013-09-12 CN CN201310415947.4A patent/CN104448031B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101585890A (en) * | 2008-06-20 | 2009-11-25 | 青岛聚大洋海藻工业有限公司 | Method for preparing sodium alginate by using giant kelp |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106317251A (en) * | 2016-08-17 | 2017-01-11 | 中国水产科学研究院黄海水产研究所 | Seaweed chemical engineering environment protection calcification process |
| CN106317251B (en) * | 2016-08-17 | 2018-06-19 | 中国水产科学研究院黄海水产研究所 | A kind of seaweed chemical environmental protection Calcific technology |
| CN108329400A (en) * | 2017-01-20 | 2018-07-27 | 山东洁晶集团股份有限公司 | A method of digestion thunder pine algae extracts algin |
| CN108329402A (en) * | 2017-01-20 | 2018-07-27 | 中国科学院过程工程研究所 | A method of digestion brown alga rhizome extracts algin |
| CN108329402B (en) * | 2017-01-20 | 2021-03-09 | 中国科学院过程工程研究所 | Method for extracting algin by digesting brown algae rhizome |
| CN115926016A (en) * | 2022-12-19 | 2023-04-07 | 山东洁晶集团股份有限公司 | Method for improving transparency and reducing turbidity of sodium alginate produced by calcification method |
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Denomination of invention: An improved method for the production process of traditional sodium alginate Effective date of registration: 20230428 Granted publication date: 20170118 Pledgee: Rizhao Bank Co.,Ltd. Donggang sub branch Pledgor: SHANDONG JIEJING Group Corp. Registration number: Y2023980039602 |