CN1268577A - Purification process for sugar juice by using low-temp. phosphorus floating method and its method - Google Patents
Purification process for sugar juice by using low-temp. phosphorus floating method and its method Download PDFInfo
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Abstract
The present invention relates to clarifying sugar juice by low temp. phospho flotation method, which is characterized by that phosphoric acid, small quantity of formaldehyde, lime, air bubbles and flocculant are added into floatation clarifying tank containing sugar juice, then remove floating slag formed from insoluble impurities to obtain clarified sugar juice, the floating slag is filtered by filter press, the filter cake can be used as organic fertilizer.
Description
The present invention relates to cane milling juice or crude beet juice (to call syrup or sugarcane juice in the following text) peace and quiet treatment process and method in a kind of sugar industry.
The clarifying syrup processing that existing sugar refinery produces white sugar is to adopt carbonatation process or sulfitation process craft, and all there is big shortcoming in they, need to improve.
1. the white sugar quality of carbonatation process production is higher, but produces a large amount of alkaline filter muds (weight percent to sugarcane is 9～10%, to beet 8～10%), can't utilize, and can only be poured into gully or marine greatly, serious environment pollution.This has become the difficult problem of world's sugar industry circle, is forced to stop production or changes technology in some sugar refinery.
The flow process of carbonatation process is seen accompanying drawing 1.Syrup adds milk of lime in advance to neutral, be heated to about 50 ℃, entering filling-up pot adds milk of lime in a large number and feeds carbonic acid gas, reaction generates a large amount of precipitation of calcium carbonate under strong basicity, contained multiple organic non-sugar such as protein, pectin, cerosin, starch and various pigment coprecipitation in its adsorbable syrup, and make inorganicss such as silicon in the syrup, magnesium, aluminium, iron form oxyhydroxide (or salt) precipitation, and with pressure filter these throw outs are removed, just obtain the clear juice of light color.Carry out the full charge second time with feeding carbonic acid gas again after its heating, make calcium ion excessive in the juice form precipitation of calcium carbonate, feeding sulfurous gas after the filtration again reaches neutral and bleaching a little, enter evaporating pot then and be condensed into syrup, concentrate at boiling pan again, make sucrose become crystal and separate out, with whizzer venting mother liquor and clean, obtain quite purified crystal (contain sucrose and surpass 99.7%), dry back dress bag is finished product.
Carbonatation process will be removed particularly pigment of more non-sugar, needs to add large quantities of lime.The fifties add ash amount (calculating) with the efficient oxidation calcium to sugarcane than about 1.3%, and that present most factory brings up to is about 2.2%, has both increased cost, and the filter mud amount is increased considerably.Press sugar refinery of sugar material thousands of tons of one day, the annual filter mud that produces reaches tens thousand of tons.Near many sugar refinery gully piles with filter mud.Rainwater is flushed to alkaline filter mud in the river when raining, and causes the severe contamination of water body again.
The major ingredient of carbonatation process filter mud is a lime carbonate, but wherein contains the organism of 12～17% (in dry substances), nitrogen content 1～1.5%.The raw material mixed sintering cement with a small amount of filter mud and cement mill was once tested in a plurality of sugar refinery, but the nitrogenous thing in the filter mud generates malodorous gas (similar burning carcase) when roasting, caused secondary (atmosphere) to pollute, and can't carry out.Because of carbonatation process will react under strong basicity, filter mud is a strong basicity again, and it and mixing with soil can make soil seriously alkalize (except the only a few strongly acidic soil), and be extremely harmful to soil property.
Once studied this filter mud modification, but the factor amount is very big, processing costs is huge and can't carry out.
2. the basic procedure of sulfitation process craft is seen accompanying drawing 2.Syrup adds milk of lime in advance to neutral and add phosphoric acid, be heated to 60～65 ℃, entering sulfitator feeds sulfurous gas and adds the milk of lime neutralization, postheating to 102 ℃, reaction generates calcium sulfite and calcium phosphate precipitation, and the organic and inorganic non-sugar of part coagulative precipitation together in the absorption syrup, natural subsidence in settling vessel, emit the clear juice in upper strata, the mud juice of bottom then through filter recovery syrup wherein, then sell to the peasant and make fertilizer (it contains more nitrogen, phosphorus and large amount of organic) by filter mud.
It is about 0.2% to the part by weight of sugarcane that sulfurous method adds amount of lime, generates the throw out amount and lack much than carbonatation process, and throw out is removed effect to the absorption of non-sugar and be can not show a candle to carbonatation process.Though sulfurous gas has certain bleaching action, peace and quiet effect particularly decolorizing effect all far below carbonatation process.Therefore, the white sugar quality that it is produced is not as carbonatation process, and product price is also lower.Most sulfitation sugar mills are for improving the quality of products, and adding sulfurous gas and phosphoric acid amount increases year by year.The Sulfur amount is about 0.05% to sugarcane than at the fifties, now generally brings up to 0.09～0.11%, and the phosphoric acid consumption also doubles above.Several improved flow processs were once studied in some sugar refinery, but basal conditions changes not quite.
3. since the seventies, sugar industry circle is all studied the phosphorus float glass process energetically both at home and abroad, but all is to be used to handle syrup (concentration about 60%, its quantity is less and wherein impurity is quite few), and all is to carry out more than 70 ℃, and basic procedure is seen accompanying drawing 3.Method is to add industrial phosphoric acid 0.04～0.06% in syrup, add milk of lime to neutral, reaction generates calcium phosphate precipitation, can be with suspended particulates in the syrup and the absorption of some pigments, charge into fine air filled cavity again and add flocculation agent (polyacrylamide), enter floating clanner.Throw out in the syrup condenses and upwards floats with bubble, obtains the syrup of wash rice clearly, and scum silica frost is dilute filtration recovery sugar part wherein then.Also useful this method of the raw sugar of China's processing import (as Cuban sugar) is carried out peace and quiet processing after raw sugar returned the melt into syrup.This processing must be carried out under comparatively high temps, with the acceleration chemical reaction, and all is to be used to handle dense liquid glucose, and its quantity is less, is convenient to use floating method.
Has researched and developed phosphorus float glass process and sulfurous method or carbonatation process bonded method in Guangdong after the eighties, all is to be used to handle syrup.Also there is the test of indivedual sugar refinery that sugarcane juice is inflated come-up at 60～65 ℃ after feeding sulfurous gas and adding milk of lime, and sugarcane juice is filtered the clarification back adds phosphoric acid and milk of lime is carried out the inflation come-up again at 80 ℃.Existing all come-ups are handled and all must be carried out under comparatively high temps.
In sum, though the peace and quiet treatment process of syrup is improved through research, the filter mud pollution problem of carbonatation process and the unfavorable problem of sulfurous method quality product still exist, and fail to solve.
The objective of the invention is to solve problems such as filter mud contaminate environment that existing production technique exists or quality product be undesirable, make filter mud become fertilizer or recycling material.
For realizing this purpose, the present patent application people has carried out big quantity research to principle and method that clarifying syrup is handled, innovation the novel process handled of low-temp phosphorus floatation method clarifying syrup, its main points are before existing carbonatation process or sulfurous method processing, syrup is carried out a low-temp phosphorus floatation method earlier to be handled: add phosphoric acid and other assistant medicaments down at low temperature (20～60 ℃) earlier, add the ash neutralization, inflation and add flocculation agent makes a large amount of non-sugars in the syrup comprise that protein, pectin, cerosin, starch and miscellaneous bagasse chaff, the cohesion of mud foam remove.Like this, peace and quiet processing thereafter is just than being easier to, and used medicament can reduce significantly, and peace and quiet effect improves.And filter mud is divided into two kinds, and a kind of is based on organism and calcium phosphate, is the high-quality fertilizer material, and another kind mainly is an inorganics: lime carbonate or calcium sulfite, can utilize again, and pollutent is become useful resource.
The low-temp phosphorus floatation method is different with method with traditional idea.Used in the past various syrup or the syrup peace and quiet method that floats is to carry out at 60～85 ℃ all, and mainly is used in the fewer syrup of impurity.The present patent application people proposes to use subzero treatment, be deleterious physicochemical change to take place owing to found the multiple non-sugar in the syrup at high temperature: cerosin and sugarcane fat part in fusion more than 55 ℃, be distributed to the emulsion that forms dark color in the water, and make the syrup filtration difficulty; The starch gelatinization that absorbs water in the hot water more than 60 ℃ disperses to form very heavy-gravity colloidal solution subsequently; Contained pectin and some polysaccharose substances in the bagasse chaff, some mishmashes just originally, but at high temperature can dissolve gradually or hydrolysis after dissolve in the syrup; Multiple phenolic material in the sugarcane juice can divide when being heated or condensation forms more dark material.These variations have rolled up dissolving dispersive non-sugar in the syrup, reduce the syrup quality, and increase the difficulty of peace and quiet processing.
The clarifying syrup method overwhelming majority in past will use high temperature, mainly is in order to make proteins coagulation, with killing bacteria with quicken various chemical reactions; Carbonatation process the first time full charge without high temperature, but want strong basicity just can reach these purposes.By traditional treatment process, if without high temperature again without strong basicity, be that impurity is condensed is isolating.But the novel method that the present patent application people creates through a large amount of experimental studies: add an amount of phosphoric acid and lime and add a spot of formaldehyde sterilization and promotion proteins coagulation (the most of coprecipitation of formaldehyde, the residue of trace is also removed when high temperature evaporation thereafter), adopt good inflation technology to generate fine and the air filled cavity of reasonable quantity, with use flocculation agent efficiently, can at short notice the above-mentioned organism in the syrup be condensed and remove, obtain the more shallow syrup of color and luster of wash rice clearly.The untoward reaction that this has just eliminated under the above-mentioned high temperature is greatly improved peace and quiet processing.
The present invention: low-temp phosphorus floatation method clarifying syrup novel process and method
Its feature 1. is its technical process (seeing accompanying drawing 4), the i.e. leading portion that used sugar juice by carbonation method or sulfurous method are handled in sugar refinery, be that syrup adds milk of lime in advance to pH7.0, after being heated to 40～60 ℃, insert low-temp phosphorus floatation method treatment process, under this temperature, add industrial phosphoric acid (is 0.05～0.1% to the syrup weight ratio) and a small amount of formaldehyde (50～150ppm), add milk of lime to syrup potential of hydrogen and be neutral, reaction generates calcium phosphate precipitation, charge into an amount of fine air filled cavity again and add flocculation agent (polyacrylamide), syrup enters floating clanner, bagasse chaff in the juice, cerosin, starch and other organic and inorganic non-sugar of part are agglomerated together, form scum silica frost and by skim, obtain wash rice and the higher clear juice of purity substantially clearly, scum silica frost is then by filter recovery clear juice wherein, filter residue (being filter mud) is through chemical analysis, and phosphoric acid calcium is about 10%, crude protein about 10%, total organic matter 60～70% is the high-quality fertilizer material.
The clear juice of its feature 2. preceding paragraphes is then handled with existing carbonatation process in sugar refinery or sulfurous method, removed particularly organic colloidal matter of a large amount of impurity because of handling through preceding paragraph, finings (milk of lime, carbonic acid gas) and discoloring agent (sulfurous gas) amount that this grade handled required adding can reduce 40～60%.The major ingredient of the filter mud that is produced is lime carbonate (or calcium sulfite), also has the compound and the organic matters of a spot of silicon, magnesium, aluminium, iron etc.This filter mud can be used as raw material and other purposes of cement baking.
Then with the existing purification method in sugar refinery, peace and quiet effect significantly improves its feature 3. novel procesies of the present invention, the juice purity height, and colour is low, is suitable for producing top grade white sugar, and can reduce the incrustation of equipment such as evaporating pot, improves heat transfer property and cuts down the consumption of energy.
Its feature 4. new process of the present invention can with the supporting application of the existing different flow processs in sugar refinery, original equipment can make full use of, and only needs to do some improvement and increases small number of devices (as floating clanner and air charging apparatus), investment is little, is convenient to implement and promote.
The present invention: low-temp phosphorus floatation clarifying syrup new process, to look into newly through Guangdong Province's scientific information research, conclusion is: " do not find the domestic bibliographical information that the low-temp phosphorus floatation method clarifying syrup treatment process identical with this project arranged." (seeing the appended novelty assessment report Xerox of this part, numbering 200360)
Embodiments of the invention are as follows:
Embodiment one, the low-temp phosphorus floatation method combines with original carbonatation process technology, but reduce the ash amount that adds significantly: sugarcane juice (or sugar beet juice) preliming is to neutral, be heated to 40～55 ℃, add industrial phosphoric acid 0.05～0.08%, formaldehyde 50～150ppm, charge into an amount of fine bubble after adding the ash neutralization, add flocculation agent (polyacrylamide) immediately, enter floating clanner, the impurity in the juice condenses and upwards floats with bubble, and scum silica frost is skimmed with pressure filter filtered and recycled syrup wherein, the clear juice of emitting with last floating clanner mixes, connect original carbonatation process flow processing, reduce 40～60% but will add the ash amount, to reduce the filter mud amount.The floating filtering filter mud of phosphorus is sold to the peasant and is made fertilizer, the filter mud of carbonatation process then with the raw material mixed sintering cement in cement mill.
Embodiment two, low-temp phosphorus floatation method combine with improved carbonatation process technology, further improve clear juice quality: sugarcane juice is handled through low-temp phosphorus floatation by embodiment one, the clear juice that obtains is undertaken once and secondary full charge, filtration (or rapid subsidence) by preceding half section of carbonatation process earlier, but clear juice sulphur that need not be traditional floats, use instead and add a small amount of industrial phosphoric acid (about 0.015%) and carry out air supporting, with further decolouring and deliming of syrup, peace and quiet better effects if.Filter mud is identical with embodiment one, and two kinds all recycling.
Embodiment three, low-temp phosphorus floatation method combine with the carbonatation process technology of simplification, shorten flow process: carry out low-temp phosphorus floatation and carbon full charge processing by embodiment one, but two carbon full charge and filtrations that need not be traditional, it is floating directly to carry out clearly juice phosphorus, thereby shortens the treatment time greatly and reduce equipment used.
Embodiment four, low-temp phosphorus floatation method combine with sulfitation process craft, improve the peace and quiet effect of sulfurous method: carry out the low-temp phosphorus floatation method by embodiment one and handle,, can significantly improve the quality of juice and white sugar clearly subsequently again by original sulfurous method flow process, reduce evaporating pot incrustation, improve the heat energy utilization rate; Eliminate the clarification difficult problem that sulfitation sugar mill occurs often, and sulphur dosage can be reduced 40～60%.
Embodiment five, low-temp phosphorus floatation method combine with middle juice carbonation process, radical reform sulfitation process craft: carry out low-temp phosphorus floatation by embodiment one and handle, the preceding triple effect of going into evaporating pot after the clear juice heating concentrates, become the middle juice of concentration about 40%, the carbonatation process of simplifying of releasing is handled, floating through phosphorus again, the clear juice that obtains reenters back two and imitates the concentrated syrup that becomes of evaporating pot.This method can be used for original sulfitation sugar mill, solve peace and quiet effect of sulfitation sugar mill and the not good problem of quality product, and sulphur dosage can reduce about 90% at all.
Claims (4)
1. low-temp phosphorus floatation method clarifying syrup novel process and method is characterized in that this technical process and method are as follows:
The leading portion that used sugar juice by carbonation method or sulfurous method are handled in sugar refinery, be that syrup adds milk of lime in advance to pH7.0, after being heated to 40～60 ℃, insert the peace and quiet treatment process of this low-temp phosphorus floatation method, under this temperature, add industrial phosphoric acid (is 0.04～0.1% to the syrup weight ratio) and a small amount of formaldehyde (50～150ppm, make sterilant), add milk of lime to syrup and be neutral, reaction generates calcium phosphate precipitation, charge into an amount of fine air filled cavity again, add flocculation agent (polyacrylamide) subsequently, enter floating clanner, the bagasse chaff in the syrup, cerosin, other the organic non-sugars cohesions of starch and part together, rising becomes scum silica frost and by skim, obtain basic clear wash rice and the higher clear juice of purity, scum silica frost reclaims wherein clear juice through filter, and filter residue is a filter mud, through chemical analysis, its phosphoric acid calcium about 10%, crude protein is about 10%, and total organic matter 60～70% is the high-quality fertilizer material.
2. according to claim 1. described low-temp phosphorus floatation clarifying syrup novel process and method, it is characterized in that the clear juice of preceding paragraph is then with existing carbonatation process in sugar refinery or sulfurous method process for producing white sugar, because of a large amount of organic impuritys in the syrup are removed, this grade handled the purification agent (milk of lime, carbonic acid gas) of required adding and the amount of discoloring agent (sulfurous gas) can reduce 40～60%, juice purity height, the colour of handling gained are low, are suitable for producing the top grade white sugar.And the major ingredient of filter mud is the compound of lime carbonate (or calcium sulfite) and a spot of silicon, magnesium, aluminium, iron and organic matters very, can be used as raw material or other purposes of cement baking.
3. according to claim 1. or 2. described novel process and methods, it is characterized in that reducing the incrustation of equipment such as evaporating pot, improve heat conductive efficiency, cut down the consumption of energy.
4. according to claim 1. or 2. described novel process and methods, it is characterized in that and to combine application with the existing different process flow process in sugar refinery, the original equipment in sugar refinery can make full use of, or as long as existing equipment is done suitably to improve, increase small number of devices (as floating clanner and air charging apparatus), can implement, required investment is few, and is easy to utilize.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021250A (en) * | 2010-12-02 | 2011-04-20 | 杨鲁昆 | Method for producing high-quality white granulated sugar by clarifying syrup |
| CN102732643A (en) * | 2012-07-24 | 2012-10-17 | 广西大学 | Method for preparing sulfur-free white sugar by carbon method with resource recycling |
| CN103160621A (en) * | 2013-03-29 | 2013-06-19 | 彭思云 | Grey phosphorus sink-and-float separation method of sugaring mixed juice |
| CN106319098A (en) * | 2016-09-26 | 2017-01-11 | 广西科技大学 | Sugar juice decoloring agent and sugar juice purification decoloring method |
| CN108192998A (en) * | 2018-01-15 | 2018-06-22 | 浙江同道糖业有限公司 | Refine the production and processing method and its manufacturing and processing equipment of full sucrose syrup |
| CN112029913A (en) * | 2019-06-04 | 2020-12-04 | 广西科技大学 | Sugar juice clarifying and decolorizing agent and application thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100500867C (en) * | 2005-04-29 | 2009-06-17 | 黄永春 | Method for clarifying sugar liquid using quick lime |
| CN101225448B (en) * | 2008-01-29 | 2010-10-13 | 霍汉镇 | Technology of carbonation process sugar factory for reducing and eliminating solid waste discharge and changing them into useful materials |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4009706A (en) * | 1976-06-18 | 1977-03-01 | American Cyanamid Company | Synthetic organic flocculants to clarify raw sugar liquor |
| CN1011042B (en) * | 1987-12-29 | 1991-01-02 | 广东省市头甘蔗化工厂 | Settling technology of retro-dissolved syrup by using floating method instead of filtering whole juice |
-
2000
- 2000-04-29 CN CN00114236A patent/CN1098357C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021250A (en) * | 2010-12-02 | 2011-04-20 | 杨鲁昆 | Method for producing high-quality white granulated sugar by clarifying syrup |
| CN102021250B (en) * | 2010-12-02 | 2013-11-20 | 杨鲁昆 | Method for producing high-quality white granulated sugar by clarifying syrup |
| CN102732643A (en) * | 2012-07-24 | 2012-10-17 | 广西大学 | Method for preparing sulfur-free white sugar by carbon method with resource recycling |
| CN103160621A (en) * | 2013-03-29 | 2013-06-19 | 彭思云 | Grey phosphorus sink-and-float separation method of sugaring mixed juice |
| CN106319098A (en) * | 2016-09-26 | 2017-01-11 | 广西科技大学 | Sugar juice decoloring agent and sugar juice purification decoloring method |
| CN106319098B (en) * | 2016-09-26 | 2019-10-18 | 广西科技大学 | A kind of sugar juice decoloring agent and the method for clarifying syrup decoloration |
| CN108192998A (en) * | 2018-01-15 | 2018-06-22 | 浙江同道糖业有限公司 | Refine the production and processing method and its manufacturing and processing equipment of full sucrose syrup |
| CN112029913A (en) * | 2019-06-04 | 2020-12-04 | 广西科技大学 | Sugar juice clarifying and decolorizing agent and application thereof |
| CN112029913B (en) * | 2019-06-04 | 2024-01-30 | 广西科技大学 | Sugar juice clarifying and decoloring agent and application thereof |
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| CN1098357C (en) | 2003-01-08 |
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