CN103266185A - Method for clarifying crude sugar liquor by ultrasonic intensified boiler flue gas - Google Patents

Method for clarifying crude sugar liquor by ultrasonic intensified boiler flue gas Download PDF

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CN103266185A
CN103266185A CN2013102028581A CN201310202858A CN103266185A CN 103266185 A CN103266185 A CN 103266185A CN 2013102028581 A CN2013102028581 A CN 2013102028581A CN 201310202858 A CN201310202858 A CN 201310202858A CN 103266185 A CN103266185 A CN 103266185A
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boiler flue
raw sugar
sugar liquid
ultrasonic
intensified
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CN103266185B (en
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于淑娟
张平军
潘润全
胡彪
黄凯
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Dongguan Sugar Factory Co ltd
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South China University of Technology SCUT
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Abstract

The invention discloses a method for clarifying crude sugar liquor by ultrasonic intensified boiler flue gas. The method comprises the following steps of: adding a calcium sucrose solution into the crude sugar liquor, introducing the boiler flue gas, and performing ultrasonic intensified treatment on the crude sugar liquor in which the boiler flue gas is introduced and the calcium sucrose is added, wherein the ultrasonic conditions comprise the ultrasonic intensity of 0.2-20 W/cm<2>, the ultrasonic frequency of 2*104Hz-2*109Hz and the ultrasonic time of 2-10 minutes; regulating the pH value of the crude sugar liquor with calcium sucrose, in which the boiler flue gas is introduced, to be 8.2-10.6, wherein the temperature is controlled to be 50-85 DEG C; and filtering, and collecting filtration liquid. Due to the calcium sucrose, the time of filling the boiler flue gas in the sugar liquor can be shortened; due to the ultrasonic intensified treatment, the generated calcium carbonate granules are uniform, non-sugar substances in the sugar liquor can be effectively adsorbed, and the sugar liquor purification effect is good; and moreover, kilns for calcining limestone can be reduced, the cost is reduced, the CO2 emission in the flue gas can be reduced, and the ecological environment is protected.

Description

Utilize the method for intensified by ultrasonic wave boiler flue clarification raw sugar liquid
Technical field
The present invention relates to the clarification of raw sugar liquid, particularly relate to a kind of method of utilizing intensified by ultrasonic wave boiler flue clarification raw sugar liquid, belong to industrialization sugaring and environmental protection field.
Background technology
Raw sugar raw sugar liquid dissolving or that extract from raw materials such as beet or sugarcane contains the impurity of 2-20%, and sugar refinery utilizes the carbonatation process clarification process, namely adds milk of lime (calculating with effective constituent CaO usually) in raw sugar liquid, feeds CO then 2, make CO 2With the lime generation calcium carbonate granule that reacts, meanwhile adsorb non-sugar impurity.Syrup colour by its clarification is low, the purity height of crystallization products obtained therefrom white sugar, and color and luster is low.
The finings CO that uses in the carbonatation process technology 2Mainly be to prepare CO by calcined limestone in the limestone kiln 2Volumetric concentration is 30-38%, and this reaction is thermo-negative reaction, and it is combustion-supporting to consume 10% coke during calcining.In addition, calcine the CO that makes 2All the other are all discharged to atmosphere except a part is used as the finings utilization, and the superfluous lime mud in calcining back belongs to solid waste.So the limestone kiln that carbonatation process technology adopts is the running cost height not only, and pollutes the environment, environment protecting is poor.
On the other hand, the material that contains a large amount of contaminate environment behind the fuel such as combustion of industrial boiler coal, crude oil, Sweet natural gas, waste fiber in the discharged flue gas, the composition of these contaminate environment is discharged in the atmosphere, can damage the ozone layer, cause the formation of acid rain, the generation of respiratory tract disease and the change of plant metabolism process.The mode of the boiler flue of sugar enterprise's processing at present generally is the water film dedusting method, and the water film dedusting method can only be removed dust, handles the back flue gas and still contains CO 2And SO 2Deng composition, CO wherein 2Content be the 8-18%(volume percent), it directly is discharged in the atmosphere, not only wasted resource but also contaminate environment.Certainly its application prospect has attracted our extensive concern.More preceding Chinese invention patent ZL200510032858.7 has announced a kind of sugar refining technology that utilizes boiler flue to make finings, and its technology is to add calcium oxide or regeneration filter mud in raw sugar liquid, feeds to contain CO 2Boiler flue, boiler flue and calcium oxide or regeneration filter mud reaction generate calcium carbonate and adsorb non-sugar impurity in the liquid glucose.But this patent does not relate to adopt and adds lime saccharate, feeds to contain CO 2Boiler flue, and utilize ultrasonic technique to strengthen reaction to generate the technology that calcium carbonate is clarified raw sugar liquid.Ultrasonic technology is a kind of science of emerging, multidisciplinary intersection, for new method has been opened up in the research of subjects such as chemical industry, food, biology, medicine, and from using above-mentioned industry is produced great influence.
Summary of the invention
The objective of the invention is to overcome the shortcoming that prior art exists, a kind of save energy is provided, reduces cost, increases economic efficiency, environment protecting utilizes boiler flue to make the process modification of finings preferably.
The present invention adds lime saccharate solution earlier in raw sugar liquid, feed to contain CO 2Boiler flue, CO in the boiler flue 2Contact with water and to generate carbonic acid, the calcium ion reaction generation calcium carbonate in carbonic acid and the liquid glucose also adsorbs non-sugar impurity in the syrup.
The object of the invention is achieved through the following technical solutions:
Utilize the method for intensified by ultrasonic wave boiler flue clarification raw sugar liquid: in raw sugar liquid, add lime saccharate solution, feed boiler flue then, control boiler flue atmospheric pressure is 0.01-0.10Mpa, intensified by ultrasonic wave is handled the raw sugar liquid that adds lime saccharate that is feeding boiler flue, and ultrasound condition is: ultrasound intensity 0.2W/cm 2-20W/cm 2Ultrasonic frequency 2 * 10 4Hz-2 * 10 9Hz; Ultrasonic time 2-10min, the feeding boiler flue is 8.2-10.6 to the pH of the raw sugar liquid that adds lime saccharate, the control temperature is 50-85 ℃; Filter, collect cleaner liquid;
Described boiler flue is the flue gas that produces behind boiler combustion coal, oil, Sweet natural gas, Mierocrystalline cellulose or the xylogen, through dedusting, clear water or soda lye wash, gas-water separation pre-treatment, remove solid, suspended impurity and sulfide then, in volume percent, the CO that obtains 2Content is the mixed gas of 8-18%;
In effective constituent CaO, described adding lime saccharate solution add-on is the 0.4-1.5% of raw sugar liquid quality.
Further, described lime saccharate solution is that calcium hydroxide emulsion mixes with raw sugar liquid and reacts generation.
Described calcium hydroxide emulsion is that the powder or the lump lime that generate behind the limestone calcination add the emulsion that the water slake generates.
The time of described feeding boiler flue is preferably 5-12min.
Described ultrasound intensity is preferably 4W/cm 2-10W/cm 2Described ultrasonic time is preferably 4-10min.
Prior art is CO 2Earlier generate carbonic acid with water, again and Ca (OH) 2Generate calcium carbonate, react as follows:
The present invention adds lime saccharate, and the formation reaction process of lime saccharate and calcium carbonate is as follows:
Figure BDA00003252375200032
Figure BDA00003252375200034
The present invention compared with prior art has following advantage and effect:
(1) the present invention adds lime saccharate in raw sugar liquid, can reduce time and the foam number of boiler flue full charge raw sugar liquid.Because lime saccharate solubleness is big, dispersed excellent, compare Ca (OH) 2Can strengthen and the contacting of carbonic acid, at the CaCO that generates equal quantities 3Condition under, adopt technology of the present invention can reduce the amount of the required boiler flue of full charge raw sugar liquid, namely reduced full charge time and foam number accordingly.
(2) the present invention can make the calcium carbonate granule of reaction generation even with intensified by ultrasonic wave processing reaction objects system, and surface-area is big, but the non-sugar impurity in the active adsorption syrup, liquid glucose purity improves 1-13%, and percent of decolourization can reach 60-85%.
(3) the present invention can reduce traffic capacity and the storage place of the used Wingdale in limestone kiln, reduces dust discharge amount, and environment protecting is good.
(4) the present invention can reduce CO in the boiler flue 2Quantity discharged, to preserve the ecological environment, to take full advantage of resource significant.
Description of drawings
Fig. 1 is embodiment 4 by the ultrasonic and chord length distribution figure of the calcium carbonate granule by supersound process not.
Embodiment
For understanding the present invention better, the present invention will be further described below in conjunction with embodiment, but embodiments of the present invention are not limited thereto.
Embodiment 1
Boiler flue is taken from the flue gas that produces behind the boiler combustion coal in sugar refinery, through dedusting, clear water or soda lye wash, gas-water separation pre-treatment, removes solid, suspended impurity and sulfide then, gets mainly to contain N 2, CO 2, CO and O 2Deng mixed gas, CO wherein 2Content is the 13-18%(volume percent), gaseous tension 0.01-0.10MPa.
Get the raw sugar liquid 1000g of 55 ° of Bx, add and contain effective composition CaO the lime saccharate solution that is 15g, after stirring, feed boiler flue, intensified by ultrasonic wave is handled the raw sugar liquid that adds lime saccharate that is feeding boiler flue, and ultrasound condition is: ultrasound intensity 20W/cm 2Ultrasonic frequency 2 * 10 9Hz; Ultrasonic time 2min.The feeding boiler flue is that 8.2 o'clock required times are about 12min to the pH of the raw sugar liquid that adds lime saccharate, and the control temperature is 50-54 ℃, in time filters, and collects cleaner liquid, detects index of correlation according to the measuring method among the international standard ICUMSA.
Colour: 3300IU before handling 420nmHandle back colour: 600IU 420nm
Percent of decolourization=(3300-600)/3300 * 100%=81.8%
Purity before handling: 98.3% (weight percent); Handle back purity: 99.5% (weight percent)
Improve purity difference: 99.5-98.3=1.2
Opacity: 513BTU before handling; Handle back opacity: 45BTU
The opacity clearance: (513-45)/513 * 100%=91.2%.
Embodiment 2
Boiler flue is taken from the flue gas that produces behind the boiler combustion oil in sugar refinery, through dedusting, clear water or soda lye wash, gas-water separation pre-treatment, removes solid, suspended impurity and sulfide then, gets mainly to contain N 2, CO 2, CO and O 2Deng mixed gas, CO wherein 2Content is the 11-16%(volume percent), gaseous tension 0.01-0.10MPa.
Get the raw sugar liquid 1000g of 35 ° of Bx, add and contain effective composition CaO the lime saccharate solution that is 10g, after stirring, feed boiler flue, intensified by ultrasonic wave is handled the raw sugar liquid that adds lime saccharate that is feeding boiler flue, and ultrasound condition is: ultrasound intensity 10W/cm 2Ultrasonic frequency 2 * 10 6Hz; Ultrasonic time 10min.The feeding boiler flue is that 10.5 o'clock required times are about 10min to the pH of the raw sugar liquid that adds lime saccharate, and the control temperature is 55-59 ℃, in time filters, and collects cleaner liquid, detects index of correlation according to the measuring method among the international standard ICUMSA.
Colour: 4790IU before handling 420nmHandle back colour: 800IU 420nm
Percent of decolourization=(4790-800)/4790 * 100%=83.3%
Purity before handling: 96.5% (weight percent); Handle back purity: 98.8% (weight percent)
Improve purity difference: 98.8-96.5=2.3
Opacity: 610BTU before handling; Handle back opacity: 59BTU
The opacity clearance: (610-59)/610 * 100%=90.3%.
Embodiment 3
Boiler flue is taken from the flue gas that produces behind the boiler combustion Sweet natural gas in sugar refinery, through dedusting, clear water or soda lye wash, gas-water separation pre-treatment, removes solid, suspended impurity and sulfide then, gets mainly to contain N 2, CO 2, CO and O 2Deng mixed gas, CO wherein 2Content is the 9-13%(volume percent), gaseous tension 0.01-0.10MPa.
Get the raw sugar liquid 1000g of 18 ° of Bx, add and contain effective composition CaO the lime saccharate solution that is 4g, after stirring, feed boiler flue, intensified by ultrasonic wave is handled the raw sugar liquid that adds lime saccharate that is feeding boiler flue, and ultrasound condition is: ultrasound intensity 0.2W/cm 2Ultrasonic frequency 6 * 10 4Hz; Ultrasonic time 4min.The feeding boiler flue is that 10.4 o'clock required times are about 5min to the pH of the raw sugar liquid that adds lime saccharate, and the control temperature is 80-85 ℃, in time filters, and collects cleaner liquid, detects index of correlation according to the measuring method among the international standard ICUMSA.
Colour: 8800IU before handling 420nmHandle back colour: 3000IU 420nm
Percent of decolourization=(8800-3000)/8800 * 100%=65.9%
Purity before handling: 82.5% (weight percent); Handle back purity: 94.5% (weight percent)
Improve purity difference: 94.5-82.5=12
Opacity: 1120BTU before handling; Handle back opacity: 50BTU
The opacity clearance: (1120-50)/1120 * 100%=95.5%.
Embodiment 4
For the further advantage of understanding ultrasound-enhanced processing boiler flue clarification raw sugar liquid, observe nothing or add ultrasound-enhanced to reacting the influence of the calcium carbonate granule chord length that generates with the online particle size analyzer of convergent pencil of rays (FBRM).
Boiler flue is taken from the flue gas that produces behind the boiler combustion Mierocrystalline cellulose in sugar refinery and the xylogen, through dedusting, clear water or soda lye wash, gas-water separation pre-treatment, removes solid, suspended impurity and sulfide then, gets mainly to contain N 2, CO 2, CO and O 2Deng mixed gas, CO wherein 2Content is the 8-14%(volume percent), gaseous tension 0.01-0.10MPa.
Get the raw sugar liquid 1000g of 25 ° of Bx, add and contain effective composition CaO the Calcium hydrogen carbonate emulsion that is 8g, after stirring, feed boiler flue, intensified by ultrasonic wave is handled the raw sugar liquid that adds lime saccharate that is feeding boiler flue, and ultrasound condition is: ultrasound intensity 4W/cm 2Ultrasonic frequency 7 * 10 7Hz; Ultrasonic time 5min.The feeding boiler flue is that 8.5 o'clock required times are about 7min to the pH of the raw sugar liquid that adds lime saccharate, and the control temperature is 60-65 ℃, in time filters, and collects cleaner liquid, detects index of correlation according to the measuring method among the international standard ICUMSA.
Colour: 7790IU before handling 420nmHandle back colour: 2800IU 420nm
Percent of decolourization=(7790-2800)/7790 * 100%=64.1%
Purity before handling: 86.5% (weight percent); Handle back purity: 93.5% (weight percent)
Improve purity difference: 93.5-86.5=7.0
Opacity: 1010BTU before handling; Handle back opacity: 49BTU
The opacity clearance: (1010-49)/1010 * 100%=95.1%.
Fig. 1 is present embodiment ultrasound condition intensive treatment and the calcium carbonate granule chord length distribution figure that has added the raw sugar liquid reaction generation of lime saccharate without ultrasound-enhanced processing stack gas full charge.Represent that the particle number of a certain chord length accounts for the per-cent of the total particle number that monitors for #% in the ordinate zou among Fig. 1 number.As shown in Figure 1, contrast no ultrasound-enhanced processing and the calcium carbonate granule chord length distribution that generates, it is narrower to add the calcium carbonate granule chord length distribution that ultrasound-enhanced processing reaction generates.Just, under the condition that generates equal mass calcium carbonate, the ultrasound-enhanced specific surface area of calcium carbonate that makes obviously increases, and can obviously increase the ability of non-sugar impurity in the absorption syrup.
As can be seen from the above embodiments, add lime saccharate solution in raw sugar liquid, feeding contains CO then 2Boiler flue, carry out intensified by ultrasonic wave simultaneously and handle, but the non-sugar impurity in the calcium carbonate active adsorption liquid glucose that generates in the reactant system, liquid glucose purity improves between the 1.2-12%, between the percent of decolourization 64.1-83.3%; Can also reduce the used kiln of calcined limestone, reduce cost, increase economic efficiency; And can reduce CO in the stack gas 2Quantity discharged, preserve the ecological environment.

Claims (6)

1. utilize the method for intensified by ultrasonic wave boiler flue clarification raw sugar liquid, it is characterized in that: in raw sugar liquid, add lime saccharate solution, feed boiler flue then, control boiler flue atmospheric pressure is 0.01-0.10Mpa, intensified by ultrasonic wave is handled the raw sugar liquid that adds lime saccharate that is feeding boiler flue, and ultrasound condition is: ultrasound intensity 0.2W/cm 2-20W/cm 2Ultrasonic frequency 2 * 10 4Hz-2 * 10 9Hz; Ultrasonic time 2-10min, the feeding boiler flue is 8.2-10.6 to the pH of the raw sugar liquid that adds lime saccharate, the control temperature is 50-85 ℃; Filter, collect cleaner liquid;
Described boiler flue is the flue gas that produces behind boiler combustion coal, oil, Sweet natural gas, Mierocrystalline cellulose or the xylogen, through dedusting, clear water or soda lye wash, gas-water separation pre-treatment, remove solid, suspended impurity and sulfide then, in volume percent, the CO that obtains 2Content is the mixed gas of 8-18%;
In effective constituent CaO, described adding lime saccharate solution add-on is the 0.4-1.5% of raw sugar liquid quality.
2. the method for utilizing intensified by ultrasonic wave boiler flue clarification raw sugar liquid according to claim 1 is characterized in that: described lime saccharate solution is that calcium hydroxide emulsion mixes with raw sugar liquid and reacts generation.
3. the method for utilizing intensified by ultrasonic wave boiler flue clarification raw sugar liquid according to claim 2, it is characterized in that: described calcium hydroxide emulsion is that the powder or the lump lime that generate behind the limestone calcination add the emulsion that the water slake generates.
4. the method for utilizing intensified by ultrasonic wave boiler flue clarification raw sugar liquid according to claim 1, it is characterized in that: the time of described feeding boiler flue is 5-12min.
5. the method for utilizing intensified by ultrasonic wave boiler flue clarification raw sugar liquid according to claim 1, it is characterized in that: described ultrasound intensity is 4W/cm 2-10W/cm 2
6. the method for utilizing intensified by ultrasonic wave boiler flue clarification raw sugar liquid according to claim 1, it is characterized in that: described ultrasonic time is 4-10min.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103586255A (en) * 2013-10-23 2014-02-19 华南理工大学 Method for treating carbonic acid method sugarhouse filter mud by using boiler flue gas
CN103638808A (en) * 2013-11-15 2014-03-19 华南理工大学 Method for enriching carbon dioxide in sugar refinery flue gas by utilizing carbonic anhydrase to catalyze lime milk
CN104962664A (en) * 2015-07-15 2015-10-07 广州甘蔗糖业研究所 Method for generating calcium carbonate clear raw sugar solution by using boiler flue gas sectional carboxylic acid saturation

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CN100494407C (en) * 2005-01-21 2009-06-03 华南理工大学 Sugar production process using boiler flue gas as clarificant
CN101538620A (en) * 2009-04-30 2009-09-23 广西大学 Improved process for clarifying sugar juice by carbonation method
CN101805805A (en) * 2009-02-18 2010-08-18 广西工学院 Method for clarifying ultrasonically-enhanced sugarcane juice

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
JPS53109960A (en) * 1977-03-09 1978-09-26 Dainippon Seito Treating of sugar solution
SU1377296A1 (en) * 1986-02-05 1988-02-28 Киевский Технологический Институт Пищевой Промышленности Carbonator for sugar=containing solutions
US20050229813A1 (en) * 2004-03-16 2005-10-20 Dionisi Fabio Alessio R Sugar cane juice clarification process
CN100494407C (en) * 2005-01-21 2009-06-03 华南理工大学 Sugar production process using boiler flue gas as clarificant
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CN101538620A (en) * 2009-04-30 2009-09-23 广西大学 Improved process for clarifying sugar juice by carbonation method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103586255A (en) * 2013-10-23 2014-02-19 华南理工大学 Method for treating carbonic acid method sugarhouse filter mud by using boiler flue gas
CN103586255B (en) * 2013-10-23 2016-06-22 华南理工大学 The method utilizing boiler flue gas disposal carbonatation process sugar refinery filter mud
CN103638808A (en) * 2013-11-15 2014-03-19 华南理工大学 Method for enriching carbon dioxide in sugar refinery flue gas by utilizing carbonic anhydrase to catalyze lime milk
CN103638808B (en) * 2013-11-15 2016-10-05 华南理工大学 Utilize the method that carbonic anhydrase catalysis lime cream is enriched with sugar refinery carbon dioxide in flue gas
CN104962664A (en) * 2015-07-15 2015-10-07 广州甘蔗糖业研究所 Method for generating calcium carbonate clear raw sugar solution by using boiler flue gas sectional carboxylic acid saturation
CN104962664B (en) * 2015-07-15 2018-07-24 广东省生物工程研究所(广州甘蔗糖业研究所) The method that calcium carbonate clarifies raw sugar liquid is generated using boiler flue segmented carbonation

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