CN110229934A - New and effective sulfurous method sugar refining technology - Google Patents
New and effective sulfurous method sugar refining technology Download PDFInfo
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- CN110229934A CN110229934A CN201910515402.8A CN201910515402A CN110229934A CN 110229934 A CN110229934 A CN 110229934A CN 201910515402 A CN201910515402 A CN 201910515402A CN 110229934 A CN110229934 A CN 110229934A
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- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B10/00—Production of sugar juices
- C13B10/02—Expressing juice from sugar cane or similar material, e.g. sorghum saccharatum
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- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B20/00—Purification of sugar juices
- C13B20/08—Purification of sugar juices by oxidation or reduction
- C13B20/10—Purification of sugar juices by oxidation or reduction using sulfur dioxide or sulfites
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- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B20/00—Purification of sugar juices
- C13B20/16—Purification of sugar juices by physical means, e.g. osmosis or filtration
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- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B25/00—Evaporators or boiling pans specially adapted for sugar juices; Evaporating or boiling sugar juices
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- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B30/00—Crystallisation; Crystallising apparatus; Separating crystals from mother liquors ; Evaporating or boiling sugar juice
- C13B30/02—Crystallisation; Crystallising apparatus
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Abstract
The invention discloses a kind of new and effective sulfurous method sugar refining technologies, the following steps are included: squeeze juice extracting, prelime, stove drying neutralizes, defeco-sulfitated juice precipitating, it is concentrated by evaporation, syrup stove drying, cane sugar boiling and crystal, purging, dry cooling, screening, packaging, wherein smart sulfur dioxide used in stove drying neutralization and syrup stove drying step is to purify thick sulfur dioxide gas using the system of spray combustion sulphur-furnace production purifying sulfur dioxide to obtain, used sulfur trioxide absorption agent includes sulphite in purification process, acid sulphite, pyrosulfite, inorganic base, carbonate, thiosulfate, one of akali sulphide is a variety of.The present invention can solve that current sulfitation process craft is more extensive, and White Sugar Quality is not sufficiently stable, while biggish practical problem is lost in sugared part conversion, greatly improves economic benefit.
Description
Technical field
The invention belongs to preparation technical fields of refining sugar, and in particular to a kind of new and effective sulfurous method sugar refining technology.
Background technique
(1) status
Domestic cane sugar manufacture mainly uses sulfurous method sugar refining technology to produce white granulated sugar, the main clarification in production procedure
Auxiliary agent is sulfur dioxide, while carrying out pH value adjustment to the raw sugar slurry after concentration using sulfur dioxide.Detailed process such as Fig. 1 institute
Show.
Sulfur dioxide used is burnt preparation in air using sulphur, and sulfur dioxide gas is usually through supercooling
Enter stove drying averager afterwards and sugarcane juice milk of lime reacts.General at present there are two types of furnace, handwarmer and mechanical spray burners, specific as schemed
2, shown in 3.
(2) necessity of sulfur trioxide removal
Due to partial combustion temperature and oxygen supply is uneven and unknown element during preparing sulfur dioxide gas
The reasons such as catalysed oxidn, the production of sulfur dioxide generally all a small amount of sulfur trioxide of association.Using handwarmer, if meticulously
Operation, control is good, then the generation of sulfur trioxide is less；Current mainly to use mechanical injection furnace, combustion intensity is high, the mistake needed
Oxygen amount be it is essential, it is invisible under, have a certain amount of sulfur trioxide and generate.
Sulfur trioxide is an adverse factor during sugaring, shows following several aspects to the harm of technique:
Firstly, it will affect the effect of stove drying neutralization.The administrative staff of one line of sugar refinery are reflected, after mechanical injection furnace,
The color value of sugar is generally slightly higher compared with using handwarmer.
Secondly, sulfur trioxide will form strong acid --- sulfuric acid promotes sugared part to decompose, causes sugar loss.Sulfuric acid is strong acid,
There is catalytic action at reduced sugar to sucrose hydrolysis, stove drying neutralization is a strong mass transport process, and the mixing of sulfuric acid and sugar is strong,
Reaction speed is quickly.Especially syrup stove drying, since syrup concentration is big, and the not neutralization of milk of lime, the catalyzing hydrolysis of sulfuric acid
Effect is very big.
Again, calcium sulfate is formed, fouling of heat exchangers is caused, influences heat transfer and product quality.Sulfur trioxide and milk of lime are anti-
The calcium sulfate for generating microsolubility is reflected, is precipitated in liquid glucose evaporation, boiling-off concentration process and forms heater, evaporator and boiling pan
Incrustation reduces the thermal efficiency, also forms the incrustation of sheet in boiling pan sometimes, product is entered after removing, influences product sensory quality.
4th, sulfur trioxide content is high, and it is higher that the calcium sulfate salt of formation also will cause product water-insoluble, influences product
The indexs such as turbidity, Conductivity ash, Vehicles Collected from Market are higher and higher to the requirement of white granulated sugar impurity content, to the control day of sulfur trioxide
Becoming seems important.
Since current sulfitation process craft is more extensive, White Sugar Quality is not sufficiently stable, at the same sugared part conversion loss compared with
Greatly, therefore, it is necessary to carry out innovation raising.
Summary of the invention
The present invention provides a kind of new and effective sulfurous method sugar refining technology, more thick with the sulfitation process craft for solving current
It puts, White Sugar Quality is not sufficiently stable, while biggish practical problem is lost in sugared part conversion.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of new and effective sulfurous method sugar refining technology, comprising the following steps: squeeze juice extracting, prelime, stove drying neutralize, in
With juice precipitating, evaporation and concentration, syrup stove drying, cane sugar boiling and crystal, purging, dry cooling, screening, packaging, wherein stove drying is neutralized and sugar
Used smart sulfur dioxide is the system purifying using spray combustion sulphur-furnace production purifying sulfur dioxide in slurry stove drying step
What thick sulfur dioxide gas obtained, used sulfur trioxide absorption agent includes sulphite, acidic sulfurous acid in purification process
One of salt, pyrosulfite, inorganic base, carbonate, thiosulfate, akali sulphide are a variety of.
Further, the sulphite include sodium sulfite, sodium hydrogensulfite, calcium sulfite, in sodium pyrosulfite
It is one or more.
Further, the acid sulphite includes one of sodium hydrogensulfite, calcium bisulfite or a variety of.
Further, the pyrosulfite includes one of sodium pyrosulfite, pyrosulfurous acid calcium or a variety of.
Further, the inorganic base includes one of sodium hydroxide, calcium hydroxide or a variety of.
Further, the carbonate includes one of calcium carbonate, calcium bicarbonate, sodium carbonate, sodium bicarbonate or a variety of.
Further, the thiosulfate includes sodium thiosulfate.
Further, the akali sulphide includes vulcanized sodium.
Further, it is neutralized in the stove drying neutralization procedure using milk of lime.
Further, it is 6.3-6.8 that pH value is controlled in the syrup stove drying step.
The invention has the following advantages:
The present invention can solve that current sulfitation process craft is more extensive, and White Sugar Quality is not sufficiently stable, while sugared part turns
Change and lose biggish practical problem, substantially increases economic benefit.
Detailed description of the invention
Fig. 1 is prior art sulfurous method sugar refining technology flow chart；
Fig. 2 is that hand burns formula sulphur-furnace stove drying neutralized system figure；
Fig. 3 is that mechanical spray fires sulphur-furnace stove drying neutralized system figure；
Fig. 4 is sulfur trioxide testing process and absorption flow chart；
Fig. 5 is sulfur trioxide testing process and absorption actual device figure；
Fig. 6 is sulfur trioxide gas sampling test schematic diagram；
Fig. 7 is that 30 grams of absorbents are respectively added into reaction flask, carries out absorbing reaction and sample to add according to experiment process method
Enter the result figure of barium chloride and hydrochloric acid；
Fig. 8 is the result for respectively taking the lotion 30ml (in the centrifuge tube of two 20ml) of two bottles to carry out centrifugation
Figure；
Fig. 9 is first time test result figure；
Figure 10 is second of test result figure；
Figure 11 is new and effective sulfurous method sugar refining technology general flow chart of the invention；
Figure 12 is the system structure diagram of spray combustion sulphur-furnace production purifying sulfur dioxide.
Specific embodiment
It to facilitate a better understanding of the present invention, is illustrated by following embodiment, these embodiments belong to of the invention
Protection scope, but do not limit the scope of the invention.
Sulfur dioxide gas used is neutralized with the presence or absence of sulfur trioxide and sulfur trioxide absorption in order to verify sugaring stove drying
The removal effect of removal device, inventor are tested.Test carries out twice altogether, respectively on March 30th, 2019 and April 27
Day, test method, result are summarized as follows:
One, test method
1, test method
Sulfur trioxide and sulfur dioxide are reacted with barium chloride solution generates barium sulfate and barium sulfite precipitating, and barium sulfite
Precipitating generates sulfur dioxide and barium chloride and dissolves after hydrochloric acid is added, and barium sulfate precipitate is then constant.It can detecte using barium chloride
The presence of sulfur trioxide, and precipitation and separation is carried out to barium sulfate by supercentrifuge, weighing obtains the content of sulfur trioxide.
This test using to sulfur trioxide absorption and to sulfur dioxide protection absorbent progress sulfur trioxide absorption, three
Sulfate is formed after absorption of sulfur oxides to stay in the solution, can detecte out the presence and quantity of sulfur trioxide using barium chloride.
2, experiment process
Sulfur trioxide testing process and absorption flow chart are as shown in figure 4, sulfur trioxide testing process and absorption flow chart are real
Border device figure is as shown in Figure 5.
Two, outcome procedure and interpretation of result
1, sulphur gas sulfur dioxide concentration and sulfur trioxide content test
(1) experimental rig
It is as shown in Figure 6 that sulfur trioxide gas samples experimental rig.
(2) test procedure
With a rigid bucket with flat cover, an air-blowing is opened to form columned sampler bag placement wherein, is closed the lid
Son opens an aperture among lid, penetrates a tubule ventilation, and sulphur gas is injected by sampling pump, bucketful be in after positive pressure stopping (through surveying
It is fixed, volume 24L), and the absorbent for the energy strong sulfur dioxide absorption and sulfur trioxide for injecting 300ml, the absorbent are
NaOH solution is swayed 5-10 minutes repeatedly after tightening sack, carries out the absorption of sulphur gas, after completion of the reaction parallel two parts of 50ml reaction
Liquid sample is separately added into excess chlorination barium, forms barium sulfite and barium sulfate precipitate；Barium chloride and then use is added in another
Excessive hydrochloric acid dissolves barium sulfite, only surplus barium sulfate precipitate.Two parts of precipitated liquids are separated with centrifuge, and drying weighing calculates.
(3) data and calculated result
Data and calculated result are as shown in the table.
(4) interpretation of result
This analysis method be it is fully closed, correlativity is simply clear.This 24L of sulphur gas sample, dioxy under normal temperature and pressure
Change sulphur and sulfur trioxide absorption agent NaOH solution 300ml, samples this 50ml after absorption, calculated according to sulfur dioxide, sulphur gas
Concentration 6.68%, element sulphur ratio 2.08% shared by sulfur trioxide.
2, removal sulfur trioxide test is absorbed with absorbent
30 grams of absorbents are respectively added into reaction flask, which is NaOH, is inhaled according to above-mentioned experiment process method
It receives to react and sample and barium chloride and hydrochloric acid is added, as a result as shown in Figure 7.
In Fig. 7, the left side be first absorbing reaction bottle sample, the right be second reaction flask sample, have
Barium sulfate precipitate generates.
The lotion 30ml (in the centrifuge tube of two 20ml) of two bottles is respectively taken to carry out centrifugation, as a result such as Fig. 8 institute
Show.
In Fig. 8, first tube bottom has apparent barium sulfate precipitate object, and second tube bottom is substantially without sediment.Two groups from
The sediment of heart pipe is weighed through dry, and data are as follows:
Sulfur trioxide absorbs centrifuge separation weighing by two-stage absorbent and calculates in sulphur gas
After dissolving and absorbing the bottle of agent NaOH, sulfur trioxide is absorbed sulphur gas, is calculated absorptivity according to data and is about
70.13%.
It should be good that this absorptivity, which corresponds to for experimental rig, it was demonstrated that the selection of absorbent is correct.It is practical raw
Production should can achieve 85%.This is because concentration of absorbing is lower, laboratory absorption reaction device or relatively simple mass transfer
Reasons, the absorptivity of test and the absorption removal rates of actual production such as efficiency is not high enough have a certain distance, this below can be into
One step confirms.
3, the problem of being found twice using sulfur trioxide in barium chloride detection sulphur gas
(1) detection method:
1250ml distilled water is added in two absorption bottle defences, is separately added into about 45 grams of barium chlorides, dissolves, be passed through sulphur gas 3 and divide
Clock, sampling pump metered flow are 1.5-2.0L/min, and about 200ml liquid is taken out from absorbing reaction bottle with conical flask, are added excessive
Dissolving with hydrochloric acid barium sulfite, two times result is as shown in Figures 9 and 10.
First time test result is as shown in Figure 9.
As can be seen from Fig. 9, the barium sulfate precipitate lotion of generation is denseer, and illustrating sulphur gas, there are more sulfur trioxides.
Second of test result is as shown in Figure 10.
The inferior sulfate radical sulfate radical that test barium chloride solution absorbs for the first time is more, and has added hydrochloric acid emulsion base sheet insoluble
Solution illustrates that sulphur gas sulfur trioxide content when testing for the first time is relatively more.The different situations tested twice illustrate that sulphur-furnace burns
Operate fluctuation of service, in this it is unstable brought to production it is very big passive.
Three, conclusion
Sulfur burning produces sulfur dioxide, in the case where air excess, high temperature, iron oxide aluminium or dust, part two
Sulfur oxide be easy further oxidation sulfur trioxide, currently widely used automatic injection sulphur-furnace, combustion intensity is big, need peroxide and
High temperature, the generation of sulfur trioxide are inevitable.
Sulfur trioxide no energy adsorbing contaminant or reduction-decolor as sulfur dioxide in stove drying, do not have clarification
There is any effect, but form strong acid sulfuric acid since it is dissolved in after sugarcane juice, meeting catalyzing hydrolysis sucrose causes sugared part conversion loss；Also by
In itself and milk of lime generate sl. sol. calcium sulfate (under room temperature, calcium sulfate solubility 0.244g/100g, calcium sulfite solubility
0.0043g/100g), be concentrated and boil in sugar be precipitated form incrustation, water-insoluble, turbidity substance etc., influence production and product
Quality is controlled.
Test, which demonstrates high temperature and sprays sulfur burner automatically, generates more sulfur trioxide.
In order to improve technological effect, sulfur trioxide purifying sulphur gas is effectively removed, the invention is realized by the following technical scheme.
Mainly thick sulfur dioxide gas is purified using various auxiliary agents or sugaring own resources, improves technique effect
Fruit.New and effective sulfurous method sugar refining technology general flow chart of the invention is as shown in figure 11.
A kind of new and effective sulfurous method sugar refining technology, comprising the following steps: squeeze juice extracting, prelime, stove drying neutralize, in
With juice precipitating, evaporation and concentration, syrup stove drying, cane sugar boiling and crystal, purging, dry cooling, screening, packaging, wherein stove drying is neutralized and sugar
Used smart sulfur dioxide is the system purifying using spray combustion sulphur-furnace production purifying sulfur dioxide in slurry stove drying step
What thick sulfur dioxide gas obtained, used sulfur trioxide absorption agent includes sulphite, acidic sulfurous acid in purification process
One of salt, pyrosulfite, inorganic base, carbonate, thiosulfate, akali sulphide are a variety of.
Mainly directly use sulphite (including but not limited to sodium sulfite, sodium hydrogensulfite, calcium sulfite, Jiao Ya
Sodium sulphate etc.) or using the existing resource brief introduction generation sulphite of sugaring process as absorbent, inhaled using aqueous solution
It receives circulated sprinkling in reaction tower and is inhibited and absorbed sulfur trioxide, manufacture reproducibility environment suitably inhibits the production of sulfur trioxide
It is raw, and reacted by absorption replacement, remove sulfur trioxide in sulphur removal gas.
Main Reaction Mechanism of Auxiliaries:
1, sulphite (including but more than sodium sulfite, calcium sulfite etc.)
Na2SO3+SO3+→Na2SO4+SO2↑
CaSO3+SO3→CaSO4+SO2↑
Or (with CaSO3For illustrate):
Step 1: CaSO3+SO2+H2O→Ca(HSO3)2
Step 2: Ca (HSO3)2+SO3→CaSO4+SO2↑+H2O
Sulfur trioxide generates sulfate and is dissolved in water, and inferior sulfate radical generates sulfur dioxide gas and utilized, this stream
Journey finally obtains pure sulfur dioxide gas.
2, acid sulphite, including but more than sodium hydrogensulfite, calcium bisulfite.Wherein calcium bisulfite meaning is most
Greatly.Reaction mechanism:
Ca(HSO3)2+SO3→CaSO4+2SO2↑
3, pyrosulfite, including but more than sodium pyrosulfite, pyrosulfurous acid calcium.Reaction mechanism:
Na2S2O5+SO3+→Na2SO4+2SO2↑
4, inorganic base, including but more than sodium hydroxide, calcium hydroxide.Reaction mechanism (illustrates) by taking calcium hydroxide as an example:
(1) step 1: Ca (OH)2Sulfur dioxide reaction in sulphur gas, generates calcium sulfite or calcium bisulfite
Ca(OH)2+SO2→CaSO3↓+H2O
(2) it step 2: calcium sulfite or calcium bisulfite are reacted with sulfur trioxide again, generates calcium sulfate and releases two
Sulfur oxide:
CaSO3+SO3→CaSO4↓+SO2↑
5, carbonate (include acid carbonate), including but more than calcium carbonate (calcium bicarbonate), sodium carbonate (bicarbonate
Sodium), illustrate by taking calcium carbonate as an example:
Step 1: calcium carbonate is reacted with sulfur trioxide or sulfur dioxide, calcium sulfate and calcium sulfite are generated, is generated simultaneously
Carbon dioxide gas, carbon dioxide gas can enter downstream with sulphur gas, not influence stove drying neutralization.
CaCO3+SO3→CaSO4↓+CO2↑
CaCO3+SO2→CaSO3↓+CO2↑
Step 2: calcium sulfite further releases sulfur dioxide with sulfur trioxide reaction；Or it is reacted with sulfur dioxide
Calcium bisulfite is generated, calcium bisulfite displaces sulfur dioxide with sulfur trioxide reaction again:
CaSO3+SO3→CaSO4↓+SO2↑
CaSO3+SO2+H2O→Ca(HSO3)2
Ca(HSO3)2+SO3→CaSO4↓+SO2↑+H2O
6, thiosulfate illustrates by taking sodium thiosulfate as an example:
Sodium thiosulfate (Na2S2O3) it is a kind of sulfurous acids salt with reproducibility, the generation of sulfur trioxide can be inhibited,
It encounters strong acid (sulfur trioxide is dissolved in water and generates sulfuric acid) and generates sodium sulphate, sulfur dioxide and elemental sulfur, so that sulfur trioxide is protected
It stays in absorbing liquid.
7, vulcanize bases, including but more than vulcanized sodium.Vulcanized sodium has reproducibility, and sulfur trioxide has oxidisability, reaction
Generate elemental sulfur and sodium sulfite:
SO3+Na2S=S+Na2SO3
Excessive vulcanized sodium can be reacted with sulfur dioxide
5SO2+2Na2S+2H2O=3S ↓+4NaHSO3
The system of specific spray combustion sulphur-furnace production purifying sulfur dioxide is as shown in figure 12.
A kind of system of spray combustion sulphur-furnace production purifying sulfur dioxide, including air blower 1, liquid sulfur pump 2, sulphur
Furnace 3, sulphur Gas Cooler 4, pre- spraying box 5, sulfur trioxide absorption 6, except gas nozzle 7, cleaning sprayer 8, pre- spray nozzle 9, lead
Aerofoil 10, collecting tank 11, circulating pump 12, Teat pipette 13, molten drug slot 14, waste collection slot 15, medical fluid return tank 16；The air blower
1, liquid sulfur pump 2 connects sulphur-furnace 3 by pipeline respectively, and the sulphur-furnace 3 connects sulphur Gas Cooler 4 by pipeline, described
Sulphur Gas Cooler 4 connects pre- spraying box 5 by pipeline, and the sulfur trioxide absorption 6 offers gas access and gas vent；
The gas access is provided with 6 middle and lower part of sulfur trioxide absorption；The gas vent is provided with the sulfur trioxide and inhales
Receive the top of tower 6.Pre- spraying box 5, the sulfur trioxide absorption are additionally provided at the gas access of the sulfur trioxide absorption 6
6 inside is equipped with cleaning sprayer 8, and pre- spray nozzle 9 is equipped in the pre- spraying box 5, is gone back inside the sulfur trioxide absorption 6
Equipped with wind deflector 10, the correspondence of wind deflector 10 is distributed at the gas access, and is in upward tilt distribution.Three oxidation
It is additionally provided with inside sulphur absorption tower 6 except gas nozzle 7；11 lower part of collecting tank is equipped with material liquid outlet；The material liquid outlet, molten drug slot
14, the circulating pump 12, described except gas nozzle 7 and the pre- spraying box 5 are attached by pipeline, composition feed liquid circulation system
System.The molten drug slot 14 by pipeline connection Teat pipette 13 and in front of the inlet of the circulating pump 12, use by the molten drug slot 14
In the stirring and dissolving and supplement that carry out feed liquid.The 6 gas vent connecting pipe of sulfur trioxide absorption and feed liquid circulating system
Medical fluid return tank 16 is provided between bypass line.The pipe branch at the liquid outlet rear of the circulating pump 12 has drain pipe；Institute
Drain pipe is stated to be mainly used for carrying out being discharged to waste collection slot 15 by into the feed liquid after recycling a period of time.Meanwhile
Valve is all distributed on each lateral of the feed liquid circulating system, for controlling the opening and closing of each lateral.Institute
Stating feed liquid used in feed liquid circulating system (sulfur trioxide absorption agent) includes sulphite, acid sulphite, pyrosulfurous acid
One of salt, inorganic base, carbonate, thiosulfate, akali sulphide are a variety of.
One of them specifically used example: the system of spray combustion sulphur-furnace production purifying sulfur dioxide of the invention is using
When, first sodium pyrosulfite and water are added in the molten drug slot 14, are stirred dissolution, being configured to mass concentration is 10.17%
Sodium metabisulfite solution, then open the valve of molten drug slot 14, start Teat pipette 13, circulating pump 12, sulfur dioxide gas to be purified
First the pre- spray nozzle 9 through pre- spraying box 5 sprays body, carries out initial absorption reaction to sulfur trioxide, then enters back into three oxidations
Sulphur absorption tower 6, in sulfur trioxide absorption, except gas nozzle 7 uniformly sprays sodium metabisulfite solution from top to bottom, and dioxy
Change sulphur gas in the case where wind deflector 10 is oriented to peptizaiton, flows from bottom to top, the gas-liquid that relatively long distance may be implemented is sufficiently effective
8 hydro-peening sulfur dioxide gas of cleaning sprayer is then used in contact again, is blown out to sulfur dioxide gas from the top of sulfur trioxide absorption
When, sulfur trioxide gas impurity is removed substantially, obtains more pure sulfur dioxide gas.And pre- spraying box 5 and three oxidations
The sodium metabisulfite solution recycling that sulphur absorption tower 6 sprays flows into the collecting tank 11 of 6 bottom of sulfur trioxide absorption, and inlet pipe
Road carries out repeating to spray utilizing by circulating pump 12, is recycled after a certain period of time to sodium metabisulfite solution, passes through drain pipe
It is discharged to waste collection slot 15.The system of spray combustion sulphur-furnace production purifying sulfur dioxide of the invention can effectively remove three oxygen
Change sulphur, sulfur trioxide absorption rate is up to 85.46%, and in addition sodium metabisulfite solution can recycle, and purifying is low in cost, uses effect
Fruit is good.
Using effect is good in order to further illustrate the present invention, is further illustrated below.
There is a sugar refinery, after using spray combustion stokehold, using thick sulfur dioxide gas stove drying, due to thick sulfur dioxide
Contain more sulfur trioxide in gas, conversion loss increases by about 0.5% loss, calculates with 0.3%, with 1,000,000 tons of processing
For sugarcane, sugarcane sugar yield per ton is about 14.5%, and sugar per ton is based on 5000 yuan, then caused by can calculating because of sulfur trioxide
Loss:
The output value virtually lost by sulfur trioxide=1,000,000 ton × 14.5% × 0.3% × 5000 yuan=217.5 ten thousand
Member.
It can be seen that can not only greatly improve economic benefit, but also the sugar of output using process of producing sugar of the invention
Quality is stablized, and product quality is high.
In addition the present invention can effectively reduce fouling of heat exchangers, the reason is as follows that:
Calcium sulfate solubility position 0.24g/100g is counted, and the moisture in sugarcane juice can dissolve 0.19g calcium sulfate, according to sugarcane juice sulphur
Sulfur trioxide position in smoked intensity 25ml, sulphur gas is 3.51% calculating, and calcium sulfate generated is about 0.017g, these calcium sulfate
It can all be dissolved in sugarcane juice, ultimately produce incrustation or molasses is followed to become the element for taking away sugar.Survey three oxygen
Change sulfur absorption rate 85.46%, it is possible to reduce incrustation about half, reduce incrustation through wash frequency.
Ash content of white granulated and the insoluble impurity of water are mainly sulfate, by absorbing treated sulphur gas, sulfur trioxide content
About 85% is reduced, ash content of white granulated and the insoluble impurity of water can be effectively reduced, to improve product matter.
Claims (10)
1. a kind of new and effective sulfurous method sugar refining technology, comprising the following steps: squeeze juice extracting, prelime, stove drying are neutralized, neutralized
Juice precipitating, evaporation and concentration, syrup stove drying, cane sugar boiling and crystal, purging, dry cooling, screening, packaging, it is characterised in that: stove drying neutralizes
And used smart sulfur dioxide is the system using spray combustion sulphur-furnace production purifying sulfur dioxide in syrup stove drying step
Purify what thick sulfur dioxide gas obtained, used sulfur trioxide absorption agent includes sulphite, acid Asia in purification process
One of sulfate, pyrosulfite, inorganic base, carbonate, thiosulfate, akali sulphide are a variety of.
2. new and effective sulfurous method sugar refining technology according to claim 1, it is characterised in that: the sulphite includes
One of sodium sulfite, sodium hydrogensulfite, calcium sulfite, sodium pyrosulfite are a variety of.
3. new and effective sulfurous method sugar refining technology according to claim 1, it is characterised in that: the acid sulphite
Including one of sodium hydrogensulfite, calcium bisulfite or a variety of.
4. new and effective sulfurous method sugar refining technology according to claim 1, it is characterised in that: the pyrosulfite packet
Include one of sodium pyrosulfite, pyrosulfurous acid calcium or a variety of.
5. new and effective sulfurous method sugar refining technology according to claim 1, it is characterised in that: the inorganic base includes hydrogen
One of sodium oxide molybdena, calcium hydroxide are a variety of.
6. new and effective sulfurous method sugar refining technology according to claim 1, it is characterised in that: the carbonate includes carbon
One of sour calcium, calcium bicarbonate, sodium carbonate, sodium bicarbonate are a variety of.
7. new and effective sulfurous method sugar refining technology according to claim 1, it is characterised in that: the thiosulfate packet
Include sodium thiosulfate.
8. new and effective sulfurous method sugar refining technology according to claim 1, it is characterised in that: the akali sulphide includes sulphur
Change sodium.
9. new and effective sulfurous method sugar refining technology according to claim 1, it is characterised in that: the stove drying neutralization procedure
It is middle to be neutralized using milk of lime.
10. new and effective sulfurous method sugar refining technology according to claim 1, it is characterised in that: the syrup stove drying step
Control pH value is 6.3-6.8 in rapid.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265491A (en) * | 2021-05-28 | 2021-08-17 | 南京甘汁园糖业有限公司 | Method for removing sulfur dioxide in liquid syrup |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101240353A (en) * | 2008-03-20 | 2008-08-13 | 广西南华糖业集团有限公司 | Technique for preparing sugar from beet sugar by phosphoric acid sulfurous acid method |
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| CN101240353A (en) * | 2008-03-20 | 2008-08-13 | 广西南华糖业集团有限公司 | Technique for preparing sugar from beet sugar by phosphoric acid sulfurous acid method |
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